KR20230098434A - Scroll compressor - Google Patents

Abstract

The present invention relates to a scroll compressor, comprising: a housing; a motor provided inside the housing; a rotation shaft rotated by the motor; an orbiting scroll that is pivotally moved by the rotation shaft; a fixed scroll meshed with the orbiting scroll to form a compression chamber; a suction chamber accommodating low-pressure refrigerant to be sucked into the compression chamber; a discharge chamber accommodating the high-pressure refrigerant discharged from the compression chamber; an injection port for injecting medium-pressure refrigerant into the compression chamber; and a sealing member preventing leakage of the injection port while preventing leakage between the suction chamber and the discharge chamber. As a result, the number of parts of the sealing member, cost, and possibility of omission during assembly 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 with a fixed scroll and an orbiting scroll.

In general, an air conditioning unit (A/C) for cooling and heating the interior of a vehicle is installed. As a component of a cooling system, such an air conditioner includes a compressor that compresses a low-temperature, low-pressure gaseous refrigerant introduced from an evaporator into a high-temperature, high-pressure gaseous refrigerant and sends it to a condenser.

Compressors include a reciprocating type that compresses refrigerant through a reciprocating motion of a piston and a rotary type that compresses refrigerant while rotating. The reciprocating type includes a crank type that transmits power to a plurality of pistons using a crank according to a power transmission method, a swash plate type that transmits power to a shaft on which a swash plate is installed, and the rotary type includes a rotating rotary shaft and a vane. There are a vane rotary type used, a scroll type using an orbiting scroll and a fixed scroll.

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

And, in recent scroll compressors, a technique of injecting a medium-pressure refrigerant into a compression chamber is applied to increase the refrigerant discharge amount.

1 is a cross-sectional view showing a conventional scroll compressor, FIG. 2 is a cross-sectional view showing a rear housing portion of the scroll compressor of FIG. 1 cut in another direction, and FIG. 3 is a rear housing, an injection valve assembly, and a second It is a left side view showing the first sealing member and the second sealing member.

1 to 3, a conventional scroll compressor includes a housing 100, a motor 200 provided inside the housing 100, a rotation shaft 300 rotated by the motor 200, The orbiting scroll 400 that is pivotally moved by the rotary shaft 300, the fixed scroll 500 that forms the compression chamber C together with the orbiting scroll 400, and the medium-pressure refrigerant from the outside of the housing 100 It includes an injection passage for guiding the compression chamber (C) and an injection valve assembly 700 for opening and closing the injection passage.

Here, the housing 100 includes a suction chamber (S2) accommodating the low-pressure refrigerant to be sucked into the compression chamber (C), a discharge chamber (D) accommodating the high-pressure refrigerant discharged from the compression chamber (C), and An introduction chamber (I) accommodating intermediate pressure refrigerant introduced from the outside of the housing 100, and the injection valve assembly 700 has an inlet 712 communicating with the introduction chamber (I), A cover plate 710 covering the introduction chamber (I), an injection valve 720 that opens and closes the inlet 712 of the cover plate 710, and the refrigerant passing through the injection valve 720 is transferred to the compression chamber (C). and a valve plate 730 having outlets 736a and 736b leading to the side.

The housing 100 further includes an annular wall 136 contacting the fixed scroll 500 and partitioning the suction chamber S2 and the discharge chamber D, and the valve plate 730 is extended to the fixed scroll 500 and further includes injection ports 732a and 732b in which the outlets 736a and 736b are formed.

A sealing member 830 preventing leakage between the suction chamber S2 and the discharge chamber D is interposed between the fixed scroll 500 and the annular wall 136, and the fixed scroll 500 Sealing members 842 and 844 for preventing leakage of the injection ports 732a and 732b are interposed between the injection ports 732a and 732b.

Here, the injection ports 732a and 732b are formed in plurality, and the sealing members 842 and 844 preventing leakage of the injection ports 732a and 732b are formed in the same number as the injection ports 732a and 732b. do.

In the conventional scroll compressor according to this configuration, when power is applied to the motor 200, the rotary shaft 300 rotates together with the rotor of the motor 200, and the orbiting scroll 400 rotates with the rotary shaft ( 300), the refrigerant is sucked into the compression chamber (C) from the suction chamber (S2) by the orbiting motion of the orbiting scroll (400), compressed in the compression chamber (C), and the discharge A series of processes of being discharged into the yarn (D) are repeated.

Here, as the intermediate pressure refrigerant is injected into the compression chamber C through the injection passage, not only the low pressure refrigerant but also the intermediate pressure refrigerant are compressed and discharged. Accordingly, the discharge amount of the refrigerant is increased compared to when only the low-pressure refrigerant is suctioned, compressed, and discharged, thereby improving performance and efficiency of the scroll compressor.

However, in such a conventional scroll compressor, the sealing member 830 prevents leakage between the suction chamber S2 and the discharge chamber D and the second seal prevents leakage between the injection ports 732a and 732b. As the members 842 and 844 are formed separately, there is a problem in that the number of parts of the sealing member, cost, and possibility of omission during assembly increase.

Republic of Korea Patent Publication No. 10-2021-0118743

Accordingly, an object of the present invention is to provide a scroll compressor capable of reducing the number of parts of the sealing member, the cost, and the possibility of missing during assembly.

The present invention, to achieve the object as described above, the housing; a motor provided inside the housing; a rotation shaft rotated by the motor; an orbiting scroll that is pivotally moved by the rotation shaft; a fixed scroll meshed with the orbiting scroll to form a compression chamber; a suction chamber accommodating low-pressure refrigerant to be sucked into the compression chamber; a discharge chamber accommodating the high-pressure refrigerant discharged from the compression chamber; an injection port for injecting medium-pressure refrigerant into the compression chamber; and a sealing member preventing leakage of the injection port while preventing leakage between the suction chamber and the discharge chamber.

The housing may further include a barrier rib contacting the fixed scroll and partitioning the suction chamber and the discharge chamber, and the sealing member may include a first sealing part interposed between the fixed scroll and the barrier rib.

The fixed scroll may include a fixed end plate having an injection port communicating with the injection port and the compression chamber, and the sealing member may include a second sealing part interposed between the fixed end plate and the injection port.

The injection ports may be formed in plural, and the injection ports and the second sealing parts may be formed in the same number as the injection ports.

The first sealing part and the second sealing part may be integrally formed.

The partition wall is formed in an annular shape, the suction chamber is formed radially outside the partition wall, the discharge chamber is formed radially inside the partition wall, the injection port is accommodated in the discharge chamber, and the first sealing part is formed in the discharge chamber. It is formed in an annular shape along the partition wall, the second sealing part is formed radially inside the first sealing part, and the sealing member is a connecting part connecting the first sealing part and the second sealing part across the discharge chamber. may further include.

The sealing member may further include a positioning hole penetrating the sealing member, the fixed scroll may further include a positioning pin inserted into the positioning hole, and the positioning hole may be formed in the connection part.

The first sealing part and the second sealing part may be formed on the same plane.

The first sealing part and the second sealing part may be formed to have the same thickness.

A seating groove into which the sealing member is inserted may be formed in the fixed end plate.

A scroll compressor according to the present invention includes a housing; a motor provided inside the housing; a rotation shaft rotated by the motor; an orbiting scroll that is pivotally moved by the rotation shaft; a fixed scroll meshed with the orbiting scroll to form a compression chamber; a suction chamber accommodating low-pressure refrigerant to be sucked into the compression chamber; a discharge chamber accommodating the high-pressure refrigerant discharged from the compression chamber; an injection port for injecting medium-pressure refrigerant into the compression chamber; and a sealing member preventing leakage of the injection port while preventing leakage between the suction chamber and the discharge chamber. As a result, the number of parts of the sealing member, cost, and possibility of omission during assembly can be reduced.

1 is a cross-sectional view showing a conventional scroll compressor;
2 is a cross-sectional view of the scroll compressor of FIG. 1 by cutting a rear housing portion in another direction;
3 is a left side view showing the rear housing, the injection valve assembly, the first sealing member and the second sealing member of FIG. 2;
4 is a cross-sectional view showing a rear housing part in a scroll compressor according to an embodiment of the present invention;
5 is a left side view showing the rear housing, the injection valve assembly and the third sealing member of FIG. 4;
Figure 6 is a perspective view showing the third sealing member of Figure 5;
FIG. 7 is a right side view of the fixed scroll of FIG. 4;

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

Figure 4 is a cross-sectional view showing a rear housing portion in a scroll compressor according to an embodiment of the present invention, Figure 5 is a left side view showing the rear housing, injection valve assembly and third sealing member of Figure 4, Figure 6 is 5 is a perspective view of the third sealing member, and FIG. 7 is a right side view of the fixed scroll of FIG. 4 .

Meanwhile, components not shown in FIGS. 4 to 7 refer to FIG. 1 .

4 to 7 and 1, the scroll compressor according to an embodiment of the present invention is rotated by a housing 100, a motor 200 provided in the housing 100, and the motor 200. It may include a rotating shaft 300, an orbiting scroll 400 that is pivotally moved by the rotation shaft 300, and a fixed scroll 500 forming a compression chamber C together with the orbiting scroll 400.

In addition, the scroll compressor according to the present embodiment includes an injection passage for guiding the intermediate pressure refrigerant from the outside of the housing 100 (for example, downstream of the condenser) to the compression chamber (C) and opening and closing the injection passage It may further include an injection valve assembly 700 .

Here, the injection passage includes an introduction port 133, an introduction chamber (I), an inlet 712, a connection passage 738, an outlet, and an inlet, which will be described later, from the rear housing 130 to the fixed scroll 500. The injection valve assembly 700 may be extended and include an inlet 712, a connection passage 738, and an outlet, which will be described later, and may be interposed between the rear housing 130 and the fixed scroll 500.

Specifically, the housing 100 includes a center housing 110 through which the rotating shaft 300 passes, and a front housing forming a motor accommodating space S1 in which the motor 200 is accommodated together with the center housing 110. 120 and the center housing 110 together with a rear housing 130 forming a suction chamber S2 in which the orbiting scroll 400 and the fixed scroll 500 are accommodated.

The center housing 110 divides the motor accommodating space S1 and the suction chamber S2 and includes a center head plate 112 supporting the orbiting scroll 400 and the fixed scroll 500 and the center head plate. It may include a center side plate 114 protruding from the outer circumference of 112 toward the front housing 120.

The center head plate 112 is formed in a substantially disk shape, and at the center of the center head plate 112, a shaft hole 112a through which one end of the rotary shaft 300 passes and the orbiting scroll 400 are fixed to the fixed scroll ( 500) side, a back pressure chamber 112b may be formed. Here, an eccentric bush 310 for converting the rotational motion of the rotational shaft 300 into the rotational motion of the orbiting scroll 400 is formed at one end of the rotational shaft 300, and the back pressure chamber 112b is the eccentric It also provides a space in which the bush 310 can rotate.

And, as will be described later, a suction passage (not shown) may be formed on an outer circumference of the center head plate 112 to guide the refrigerant flowing into the motor accommodating space S1 to the suction chamber S2.

The front housing 120 is opposed to the center head plate 112 and protrudes from the front head plate 122 supporting the other end of the rotation shaft 300 and the outer circumferential portion of the front head plate 122, and the center side plate 114 ) and may include a front side plate 124 for supporting the motor 200.

Here, the center end plate 112, the center side plate 114, the front end plate 122, and the front side plate 124 may form the motor accommodating space S1.

In addition, a suction port (not shown) may be formed in the front side plate 124 to guide low-pressure refrigerant from the outside to the motor accommodating space S1.

The rear housing 130 includes a discharge chamber D for accommodating the high-pressure refrigerant discharged from the compression chamber C, and a discharge port for guiding the refrigerant in the discharge chamber D to the outside of the housing 100 ( 131), an introduction port 133 through which medium-pressure refrigerant is introduced from the outside of the housing 100, and an introduction chamber I accommodating the refrigerant introduced through the introduction port 133 may be further included.

Here, the rear housing 130 is a rear head plate 132 facing the center head plate 112, protruding from the rear head plate 132 and located at the outermost side of the rear housing 130 in the radial direction. A first annular wall 134, a second annular wall 136 that protrudes from the rear end plate 132 and is accommodated in the first annular wall 134, and a second annular wall that protrudes from the rear end plate 132 and is accommodated in the first annular wall 134 It may include a third annular wall 138 received in 136.

The first annular wall 134 is formed in an annular shape having a diameter approximately equal to that of the outer circumference of the center end plate 112, is fastened to the outer circumference of the center end plate 112, and forms the suction chamber S2. can do.

The second annular wall 136 is formed in an annular shape having a smaller diameter than the first annular wall 134, contacts the outer circumferential portion of the fixing head plate 510 to be described later, and is accommodated in the suction chamber S2. The discharge chamber (D) partitioned from the suction chamber (S2) may be formed.

The third annular wall 138 is formed in an annular shape having a diameter smaller than that of the second annular wall 136, is spaced apart from a fixed end plate 510 to be described later, and is covered by an injection valve assembly 700 to be described later. , It is possible to form an introduction chamber (I) accommodated in the discharge chamber (D) and partitioned from the discharge chamber (D).

The discharge port 131 is formed in the rear head plate 132, and the discharge port 131 extends from the center of the rear head plate 132 to one side of the outer circumference of the rear head plate 132. It extends in the radial direction and may communicate with the discharge chamber (D).

In addition, the introduction port 133 is also formed in the rear head plate 132, and the introduction port 133 extends from the other side of the outer circumference of the rear head plate 132 to the center of the rear head plate 132. ), and may be formed extending in the radial direction of, and communicate with the introduction chamber (I).

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

The rotating shaft 300 is fastened to the rotor 220 and passes through the center of the rotor 220 so that one end of the rotating shaft 300 passes through the bearing hole 112a of the center mirror plate 112 and The other end of the rotating shaft 300 may be supported by the front end plate 122 .

The orbiting scroll 400 is interposed between the center end plate 112 and the fixed scroll 500, and extends toward the fixed scroll 500 from the disk-shaped orbiting head plate 410 and the center of the orbiting head plate 410. It may include a protruding orbiting wrap 420 and a boss portion 430 protruding from the center of the orbiting end plate 410 to an opposite side of the orbiting wrap 420 and fastened to the eccentric bush 310 .

The fixed scroll 500 includes a disc-shaped fixed end plate 510, a fixed wrap 520 protruding from the center of the fixed end plate 510 and engaged with the orbiting wrap 420, and an outer periphery of the fixed end plate 510. It may include a fixed side plate 530 protruding from and fastened to the center end plate 112 .

The fixed end plate 510 includes a discharge hole 512 for discharging the refrigerant in the compression chamber C to the discharge chamber D, and the discharge hole 512 is connected to the fixed end plate 510 and the injection valve assembly. It can be opened and closed by the discharge valve 600 interposed between (700).

Also, the fixed end plate 510 may further include an inlet for guiding the refrigerant discharged from the injection valve assembly 700 to the compression chamber C.

Here, the compression chamber (C) is located on the radially centrifugal side of the fixed scroll 500 and the first compression chamber located on the radially centrifugal side of the fixed scroll 500 and is larger than the first compression chamber. A second compression chamber having a high pressure may be included, and each of the first compression chamber and the second compression chamber may be formed as a pair.

That is, the first compression chamber is a first outer compression chamber formed by the outer circumferential surface of the orbiting wrap 420 and the inner circumferential surface of the stationary wrap 520, and the inner circumferential surface of the orbiting wrap 420 and the stationary wrap 520. It may include a first inner compression chamber formed by the outer circumferential surface.

In addition, the second compression chamber is a second outer compression chamber formed by the outer circumferential surface of the orbiting wrap 420 and the inner circumferential surface of the stationary wrap 520 and the inner circumferential surface of the orbiting wrap 420 and the stationary wrap 520. It may include a second inner compression chamber formed by the outer circumferential surface.

At this time, the outlet 512 may be formed at the center of the fixed end plate 510 to discharge the refrigerant of the second outer compression chamber and the second inner compression chamber.

Also, the inlet may be formed to supply all of the refrigerant discharged from the injection valve assembly 700 to the pair of first compression chambers. That is, the inlet may include a first inlet 514a capable of communicating with the first outer compression chamber and a second inlet 514b capable of communicating with the first inner compression chamber.

The fixed end plate 510 communicates with the first injection port 514a and communicates with the first injection port insertion groove 516a into which the first injection port 732a to be described later is inserted and the second injection port 514b. and may further include a second injection port insertion groove 516b into which a second injection port 732b to be described later is inserted.

The fixed wrap 520 may extend from the center of the fixed scroll 500 toward the outer circumference of the fixed scroll 500 in a logarithmic spiral shape, for example.

The fixed side plate 530 may be formed in an annular shape extending along an outer circumference of the fixed end plate 510 .

The injection valve assembly 700 may be formed on a front end surface of the third annular wall 138 to communicate and shield the introduction chamber I and the injection hole.

Specifically, the injection valve assembly 700 is fastened to the front end surface of the third annular wall 138 to cover the introduction chamber (I), the cover plate 710, based on the cover plate 710 A valve plate 730 fastened to the cover plate 710 on the opposite side of the introduction chamber I and an injection valve 720 interposed between the cover plate 710 and the valve plate 730 may be included. there is.

The cover plate 710 includes a cover plate upper surface 710a facing the introduction chamber I and the third annular wall 138, and a cover plate facing the valve plate 730 and the injection valve 720. An inlet passing through the cover plate 710 from the lower surface 710b and the center of the cover plate 710 from the upper surface 710a of the cover plate to the lower surface 710b of the cover plate and communicating with the introduction chamber I ( 712) may be included.

The injection valve 720 may be formed in the form of a reed valve.

The valve plate 730 forms an upper surface 730a of the valve plate opposite to the cover plate 710 and the injection valve 720 and a rear surface of the upper surface 730a of the valve plate and faces the fixed scroll 500. It may include a lower valve plate (730b).

Also, the valve plate 730 may include a first injection port 732a and a second injection port 732b protruding from the lower surface 730b of the valve plate.

The first injection port 732a has a first large-diameter portion 732aa protruding from one side of the lower surface 730b of the valve plate and an outer diameter smaller than the first large-diameter portion 732aa, and the first large-diameter portion 732aa A first small-diameter portion 732ab that protrudes further from and is inserted into the first injection port insertion groove 516a may be included.

The second injection port 732b has a second large-diameter portion 732ba protruding from the other side of the lower surface 730b of the valve plate and an outer diameter smaller than the second large-diameter portion 732ba, and the second large-diameter portion 732ba It may further protrude from and include a second small diameter portion 732bb inserted into the second injection port insertion groove 516b.

The valve plate 730 penetrates the first outlet 736a communicating with the first injection port 514a through the first injection port 732a and the second injection port 732b to pass through the first injection port 732b. 2 a second outlet 736b communicating with the inlet 514b and a connection passage 738 for guiding the refrigerant passing through the injection valve 720 to the first outlet 736a and the second outlet 736b can include more.

Meanwhile, a first sealing member 810 may be interposed between the upper surface 710a of the cover plate and the third annular wall 138 to seal between the discharge chamber D and the introduction chamber I.

In addition, a second sealing member 820 may be interposed between the upper surface 730a of the valve plate and the lower surface 710b of the cover plate to seal between the discharge chamber D and the connection passage 738 .

And, a first sealing part 852 interposed between the front end surface of the fixed end plate 510 and the second annular wall 136 to prevent leakage between the suction chamber S2 and the discharge chamber D, A second injection port 732a is interposed between the fixed end plate 510 and the first injection port 732a (more precisely, the front end surface of the first large-diameter portion 732aa) to prevent leakage of the first injection port 732a. 1 sealing portion 854 and the fixed end plate 510 and the second injection port 732b (more precisely, the front end face of the second large-diameter portion 732ba) to prevent leakage of the second injection port 732b. A 2-2 sealing part 856 interposed therebetween, a first connection part 853 connecting the first sealing part 852 and the 2-1 sealing part 854, and the first sealing part 852 ) and the second sealing member 850 having a second connecting portion 855 connecting the 2-2 sealing portion 856 may be provided.

Here, the first sealing portion 852 is formed in an annular shape along the second annular wall 136, and the 2-1 sealing portion 854 and the 2-2 sealing portion 856 are respectively It is formed on the inside of the first sealing part 852 in the radial direction, and the first connection part 853 crosses the discharge chamber D from one side of the first sealing part 852 to the 2-1st sealing part. 854, and the second connection part 855 may extend from the other side of the first sealing part 852 to the 2-2 sealing part 856 across the discharge chamber D. .

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

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

In addition, the orbiting scroll 400 may receive rotational force from the rotary shaft 300 through the eccentric bush 310 and perform a orbital motion.

Accordingly, the compression chamber (C) can be reduced in volume while continuously moving toward the center side.

The low-pressure refrigerant may be introduced into the compression chamber C through the suction port (not shown), the motor accommodation space S1, the suction passage (not shown), and the suction chamber S2.

In addition, the refrigerant sucked into the compression chamber (C) may be compressed while moving toward the center along the moving path of the compression chamber (C) and discharged to the discharge chamber (D) through the discharge port (512).

Also, the refrigerant at the discharge pressure discharged into the discharge chamber D may be discharged to the outside of the compressor through the discharge port 131 .

In this process, as the intermediate pressure refrigerant is injected into the compression chamber C through the injection passage opened and closed by the injection valve assembly 700, not only the low pressure refrigerant but also the intermediate pressure refrigerant are compressed and discharged. can That is, when the pressure in the introduction chamber (I) exceeds a predetermined value, the injection valve 720 may be deformed and the inlet 712 may be opened. Accordingly, the refrigerant in the introduction chamber (I) is injected into the first outer compression chamber through the inlet 712, the connection passage 738, the first outlet 736a, and the first inlet 514a. After that, it may proceed to the second outer compression chamber and be compressed. In addition, after the refrigerant in the introduction chamber (I) is injected into the first inner compression chamber through the inlet 712, the connection passage 738, the second outlet 736b, and the second inlet 514b, It proceeds to the second inner compression chamber and can be compressed. Accordingly, the discharge amount of the refrigerant may be increased, and performance and efficiency may be improved, compared to when only the low-pressure refrigerant is suctioned, compressed, and discharged.

On the other hand, when the pressure in the introduction chamber (I) is lower than a predetermined value, the injection valve 720 may be restored and the inlet 712 may be closed. Accordingly, the injection of the intermediate pressure refrigerant into the compression chamber (C) can be stopped.

Here, in the scroll compressor according to the present embodiment, the third sealing member 850 includes the first sealing part 852, the 2-1 sealing part 854, and the 2-2 sealing part 856 , As the first connection part 853 and the second connection part 855 are included, a member preventing leakage between the suction chamber S2 and the discharge chamber D, the first injection port 732a The leakage preventing member and the leakage preventing member of the second injection port 732b may be integrally formed. As a result, the number of parts of the sealing member, the cost, and the possibility of omission during assembly can be reduced.

Meanwhile, although not separately shown, means for positioning the third sealing member 850 to a predetermined position may be further provided.

That is, for example, the third sealing member 850 further includes a positioning hole passing through the third sealing member 850, and the fixed scroll 500 further includes a positioning pin inserted into the positioning hole. can include

Here, when the positioning hole is formed in the first sealing part 852, the 2-1 sealing part 854, or the 2-2 sealing part 856, the sealing area is reduced and the leakage prevention performance is deteriorated. Possibly, the positioning hole may be preferably formed at the first connection part 853 and the second connection part 855 that are not related to leakage prevention.

Alternatively, a seating groove into which the third sealing member 850 is inserted may be formed in the fixed end plate 510 .

Here, in order to prevent the first sealing part 852, the 2-1 sealing part 854, and the 2-2 sealing part 856 from being compressed when some of them are compressed, the first sealing part 852 is not compressed. The first sealing part 852, the 2-1 sealing part 854, and the 2-2 sealing part 856 may be formed on the same plane and have the same thickness. In addition, it may be preferable that the seating groove is also formed to have a certain depth.

100: housing
136: second annular wall
200: motor
300: axis of rotation
400: turning scroll
500: fixed scroll
510: fixed head plate
514a: first inlet
514b: second inlet
700: injection valve assembly
730: valve plate
732a first injection port
732b second injection port
850: third sealing member
852: first sealing part
853: first connection
854: 2-1 sealing part
856: 2-2 sealing part
855: second connection
C: compression chamber
D: discharge chamber
S2: suction chamber 10

Claims (10)

housing;
a motor provided inside the housing;
a rotation shaft rotated by the motor;
an orbiting scroll that is pivotally moved by the rotation shaft;
a fixed scroll meshed with the orbiting scroll to form a compression chamber;
a suction chamber accommodating low-pressure refrigerant to be sucked into the compression chamber;
a discharge chamber accommodating the high-pressure refrigerant discharged from the compression chamber;
an injection port for injecting medium-pressure refrigerant into the compression chamber; and
and a sealing member preventing leakage of the injection port while preventing leakage between the suction chamber and the discharge chamber. According to claim 1,
The housing further includes a partition wall that is in contact with the fixed scroll and partitions the suction chamber and the discharge chamber;
The sealing member includes a first sealing part interposed between the fixed scroll and the partition wall. According to claim 2,
The fixed scroll includes a fixed end plate having an injection port communicating with the compression chamber and the injection port;
The sealing member includes a second sealing part interposed between the fixed end plate and the injection port. According to claim 3,
The injection port is formed in plurality,
The injection port and the second sealing portion are formed in the same number as the injection ports, respectively. According to claim 4,
The scroll compressor wherein the first sealing part and the second sealing part are integrally formed. According to claim 5,
The barrier rib is formed in an annular shape,
The suction chamber is formed radially outside the partition wall,
The discharge chamber is formed radially inside the partition wall,
the injection port is accommodated in the discharge chamber;
The first sealing part is formed in an annular shape along the partition wall,
The second sealing portion is formed radially inside the first sealing portion,
The sealing member further comprises a connecting portion connecting the first sealing portion and the second sealing portion across the discharge chamber. According to claim 6,
The sealing member further comprises a positioning hole penetrating the sealing member,
The fixed scroll further includes a positioning pin inserted into the positioning hole,
The positioning hole is formed in the connecting portion scroll compressor. According to claim 3,
The first sealing part and the second sealing part are formed on the same plane as the scroll compressor. According to claim 8,
The first sealing part and the second sealing part are formed to have the same thickness. According to claim 3,
A scroll compressor in which a seating groove into which the sealing member is inserted is formed in the fixed end plate.

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