KR20230049366A - Compressor - Google Patents

Abstract

The present invention relates to a scroll compressor, comprising: a motor; a rotation shaft rotated by the motor; an orbiting scroll that is pivotally moved by the rotation shaft; a fixed scroll engaged with the orbiting scroll to form a compression chamber; a rear housing accommodating the refrigerant discharged from the compression chamber; and a discharge valve opening and closing the discharge port of the fixed scroll, wherein the discharge valve includes a case assembled to the rear housing and a core reciprocating inside the case, wherein the rear housing includes a first chamber, the A second chamber accommodating the first chamber and communicating with a discharge port of the rear housing, and a partition wall partitioning the first chamber and the second chamber, wherein the discharge valve is accommodated in the first chamber, thereby discharging Noise caused by the valve is reduced, deformation of the fixed scroll caused by the discharge valve is suppressed, and the number of parts and manufacturing cost can be reduced.

Description

Scroll Compressor {COMPRESSOR}

The present invention relates to a scroll compressor, and more particularly, to a scroll compressor capable of reducing noise, preventing deformation of a fixed scroll, and reducing cost.

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 according to the reciprocating motion of a piston and a rotary type that compresses refrigerant while rotating. In the reciprocating type, there is a crank type that uses a crank to transmit to a plurality of pistons according to the transmission method of the drive source, a swash plate type that transmits to a rotating shaft with a swash plate installed, and the like. There are scrolling types that use orbiting scrolls and fixed scrolls.

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.

The scroll compressor includes a housing, a motor provided inside the housing, a rotation shaft rotated by the motor, an orbiting scroll rotated by the rotation shaft, a stationary fixed to the housing and engaged with the orbiting scroll to form a compression chamber. and a rear housing fastened to the scroll and the fixed scroll and accommodating the refrigerant discharged from the compression chamber.

Here, the fixed scroll includes a discharge port for discharging the refrigerant in the compression chamber, and is provided with a discharge valve that opens and closes the discharge port. The discharge valve includes a cantilever-shaped discharge lead and a valve for limiting the opening amount of the discharge lead. A retainer and a fastening bolt fixing the discharge lead and the valve retainer to the fixed scroll are included.

On the other hand, the rear housing includes an oil separator for separating oil from the refrigerant and an oil return passage for recovering the oil separated from the refrigerant by the oil separator, and a screen member for collecting foreign substances from the oil in the oil return passage is inserted

In the conventional scroll scroll compressor according to this configuration, when power is applied to the motor, the rotational shaft is rotated by the motor, the orbiting scroll receives rotational force from the rotational shaft and rotates, and the compression chamber moves toward the center. As it moves continuously, its volume decreases. The refrigerant is introduced into the compression chamber, moved toward the center along a moving path of the compression chamber, compressed, and then discharged toward the rear housing. The refrigerant discharged to the rear housing is separated from the oil by the oil separator and then discharged to the outside of the housing. Meanwhile, the oil separated from the refrigerant by the oil separator is recovered through the oil return passage.

However, in such a conventional scroll scroll compressor, when the discharge valve opens and closes the discharge port, noise increases as the discharge lead continuously strikes the fixed scroll.

In addition, as the discharge valve is assembled with the fixed scroll, there is a problem in that the fixed scroll is deformed.

In addition, as the discharge lead, the valve retainer, the fastening bolt, the oil separator, and the screen member are assembled after being formed, the number of parts and the number of manufacturing processes increase, resulting in an increase in manufacturing cost.

Japanese Unexamined Patent Publication 2018-053827

Accordingly, an object of the present invention is to provide a scroll compressor capable of reducing noise caused by a discharge valve.

Another object of the present invention is to provide a scroll compressor capable of suppressing deformation of a fixed scroll by a discharge valve.

In addition, another object of the present invention is to provide a scroll compressor capable of reducing the number of parts and manufacturing cost.

The present invention, to achieve the object as described above, the motor; a rotation shaft rotated by the motor; an orbiting scroll that is pivotally moved by the rotation shaft; a fixed scroll engaged with the orbiting scroll to form a compression chamber; a rear housing accommodating the refrigerant discharged from the compression chamber; and a discharge valve opening and closing the discharge port of the fixed scroll, wherein the discharge valve includes a case assembled to the rear housing and a core reciprocating inside the case, and the rear housing includes a first chamber , a second chamber accommodating the first chamber and communicating with a discharge port of the rear housing, and a partition wall partitioning the first chamber and the second chamber, wherein the discharge valve is accommodated in the first chamber Scroll Compressors are provided.

The rear housing further includes a first through hole penetrating the partition wall and communicating the first chamber and the second chamber, and a groove formed in a recess at a corner where a front end surface of the partition wall and an inner circumferential surface meet and supporting the discharge valve. An oil separation chamber may be formed between the bulkhead and the core to separate oil from the refrigerant.

The case includes an annular first head plate, a first annular wall portion protruding in an axial direction from an inner circumferential portion of the first head plate portion and accommodated in the first chamber, a second head plate portion covering a front end of the first annular wall portion, and A second annular wall portion protruding from the outer circumference of the first head plate in an axial direction and surrounding the first annular wall portion, and a flange portion protruding in a radial direction from the outer circumference of the first head plate portion and being inserted into the groove.

The flange portion may include a stepped portion supported by the groove and a preload portion supported by the fixed scroll so as to be compressed and fixed between the fixed scroll and the rear housing.

The flange portion may be formed as close to the fixed scroll as possible within a range in which a force applied to the fixed scroll by the discharge valve is equal to or less than a predetermined value.

The first head plate portion and the flange portion may be formed such that a volume between the discharge hole and the discharge valve is 1% or less of the scroll capacity.

The flange portion may further include a cutout formed between the stepped portion and the preload portion to facilitate deformation of the preload portion.

A sealing member may be interposed between the second annular wall portion and the barrier rib.

The first annular wall portion and the second end plate portion form a core chamber accommodating the core, and the first end portion, the first annular wall portion, and the second annular wall portion form the oil separation chamber. 1, a window that communicates the core chamber and the oil separation chamber and is opened and closed by the core may be formed on the annular wall portion.

The core may include a protrusion protruding toward the first annular wall portion, and a guide slit extending in a movement direction of the core and into which the protrusion is inserted may be formed in the first annular wall portion.

The guide slit may be formed to limit the movement of the protrusion when the core is to be moved in a direction closer to the discharge port than a predetermined position.

Concavo-convex may be formed on an inner circumferential surface of the second annular wall portion.

The discharge valve further includes a cap covering a front end of the second annular wall, and the cap collects foreign substances from a valve outlet communicating the oil separation chamber and the first chamber and refrigerant and oil passing through the valve outlet. It includes a screen that does, and the cap and the screen may be integrally formed.

The rear housing may further include a second through-hole passing through the bulkhead and communicating the oil return passage and the first chamber, and the second through-hole may be formed in a gravity direction side of the first through-hole.

The discharge valve communicates with the discharge port and includes a core chamber in which the core reciprocates, a window opened and closed by the core, an oil separation chamber separating oil from the refrigerant discharged from the core chamber through the window, the oil It may further include a valve outlet for guiding the refrigerant and oil in the separation chamber to the outside of the discharge valve, and a screen for collecting foreign substances from the refrigerant and oil passing through the valve outlet.

A scroll compressor according to the present invention includes a motor; a rotation shaft rotated by the motor; an orbiting scroll that is pivotally moved by the rotation shaft; a fixed scroll engaged with the orbiting scroll to form a compression chamber; a rear housing accommodating the refrigerant discharged from the compression chamber; and a discharge valve opening and closing the discharge port of the fixed scroll, wherein the discharge valve includes a case assembled to the rear housing and a core reciprocating inside the case, and the rear housing includes a first chamber , a second chamber accommodating the first chamber and communicating with a discharge port of the rear housing, and a partition wall partitioning the first chamber and the second chamber, and the discharge valve is accommodated in the first chamber. , Noise due to the discharge valve is reduced, deformation of the fixed scroll caused by the discharge valve is suppressed, and the number of parts and manufacturing cost can be reduced.

1 is a cross-sectional view showing a scroll compressor according to an embodiment of the present invention;
2 is an enlarged cross-sectional view of an installation site of a discharge valve in the scroll compressor of FIG. 1;
3 is a cross-sectional view of the discharge valve of FIG. 2 by cutting it from another side;
4 is a cross-sectional view showing a state in which the discharge valve of FIG. 2 is closed;
5 is a cross-sectional view of the discharge valve of FIG. 4 by cutting it from another side;
6 is a perspective view showing the discharge valve of FIGS. 1 to 5;
Figure 7 is a side view showing the case from the left in the discharge valve of Figure 6;
8 is a perspective view of a case from the right side of the discharge valve of FIG. 6;
9 is a perspective view of the cap in the discharge valve of FIG. 6 from the left;
Fig. 10 is a right side view of Fig. 6;

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

1 is a cross-sectional view showing a scroll compressor according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of a discharge valve installation site in the scroll compressor of FIG. 1, and FIG. 3 is a cross-sectional view showing the discharge valve of FIG. 4 is a cross-sectional view showing the discharge valve of FIG. 2 in a closed state, FIG. 5 is a cross-sectional view of the discharge valve of FIG. 4 cut away from another surface, and FIG. A perspective view showing the discharge valve of FIGS. 1 to 5, FIG. 7 is a side view of the discharge valve case of FIG. 6 from the left, and FIG. 8 is a perspective view of the discharge valve of FIG. 6 from the right side of the case. 9 is a perspective view of the cap in the discharge valve of FIG. 6 from the left side, and FIG. 10 is a right side view of FIG. 6 .

Referring to FIG. 1, the scroll compressor according to an embodiment of the present invention includes a housing 100, a motor 200 generating power inside the housing 100, and a rotation shaft rotated by the motor 200 ( 300), an orbiting scroll 400 that is pivotally moved by the rotary shaft 300, and a fixed scroll 500 fixed to the housing 100 and engaged with the orbiting scroll 400 to form a compression chamber. there is.

The housing 100 includes a center housing 110, a front housing 120 fastened to one side of the center housing 110 and forming a motor accommodating space in which the motor 200 is accommodated, and the center housing 110. It may include a rear housing 130 fastened to the other side and forming a scroll accommodating space accommodating the orbiting scroll 400 and the fixed scroll 500 and a discharge space accommodating the refrigerant discharged from the compression chamber.

The center housing 110 divides the motor accommodating space and the scroll accommodating space, and the main frame 112 supporting the orbiting scroll 400 and the rear housing 130 from the outer circumference of the main frame 112 A center housing side plate 114 protruding to the side and supporting the fixed scroll 500 may be included.

The main frame 112 is formed in a substantially disk shape, and at the center of the main frame 112, 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 A space in which the bush 310 can rotate may be provided.

The front housing 120 is opposed to the main frame 112 and protrudes from a front housing head plate 122 supporting the other end of the rotating shaft 300 and an outer circumferential portion of the front housing head plate 122, and the main frame It may include a front housing side plate 124 that is fastened to the outer periphery of 112 and supports 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 134 protruding from an outer circumference of the rear housing head plate 132 and fastened to the center housing side plate 114 ) may be included.

In addition, the rear housing 130 is a partition wall that protrudes annularly from the rear housing head plate 132 toward the fixed scroll 500 to divide the discharge space into a first chamber C1 and a second chamber C2. (136) may be further included.

Here, the first chamber C1 is a space formed inside the partition wall 136 in the radial direction, and a discharge valve 600 to be described later may be accommodated in the first chamber C1.

The second chamber C2 is a space formed outside the partition wall 136 in the radial direction, and can accommodate the first chamber C1 and guide the refrigerant to the outside of the housing 100. It may be in communication with the discharge port 138 for

Further, the rear housing 130 has a first through hole 136a passing through one side of the partition wall 136 to communicate the first chamber C1 with the second chamber C2 and the partition wall 136 It may further include a second through hole 136b penetrating the other side of the first chamber C1 to communicate with the oil return passage P.

Here, the refrigerant in the first chamber (C1) flows to the second chamber (C2) through the first through hole (136a), and the oil in the first chamber (C1) flows through the second through hole ( 136b), the second through hole 136b may be formed closer to the gravity direction than the first through hole 136a so as to flow into the oil return passage P.

And, referring to FIGS. 2 and 4, the rear housing 130 includes a groove 136c formed in a negative shape at a corner where the front end surface of the partition wall 136 and the inner circumferential surface meet to support a discharge valve 600 to be described later. may further include.

The motor 200 may include a stator 210 fixed to the front housing 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 shaft hole 112a of the main frame 112 and The other end of the rotating shaft 300 may be supported by the front housing head plate 122 .

The orbiting scroll 400 is interposed between the main frame 112 and the fixed scroll 500, and the disk-shaped orbiting scroll head 410 extends from the center of the orbiting scroll head 410 to the fixed scroll 500. ) Includes an orbiting scroll wrap 420 protruding to the side and an orbiting scroll boss 430 protruding from the center of the orbiting scroll head plate 410 to the opposite side of the orbiting scroll wrap 420 and fastened to the eccentric bush 310 can do.

The fixed scroll 500 consists of a disk-shaped fixed scroll head plate 510, a fixed scroll wrap 520 protruding from the center of the fixed scroll head plate 510 and engaged with the orbiting scroll wrap 420, and the compression chamber. A discharge port 530 passing through the fixed scroll head plate 510 may be included at the center of the fixed scroll head plate 510 to discharge the refrigerant toward the first chamber C1.

And, the scroll compressor according to the present embodiment further includes a discharge valve 600 that opens and closes the discharge port 530, and the discharge valve 600 reduces noise and manufacturing cost and prevents deformation of the fixed scroll 500. It can be formed to suppress.

Specifically, referring to FIGS. 2 to 10 , the discharge valve 600 includes a case 610 assembled to the rear housing 130, a core 620 reciprocating inside the case 610, the An elastic member 630 for applying an elastic force to the core 620 and a cap 640 fastened to the case 610 may be included.

The case 610 includes an annular first head plate portion 612, a first annular wall portion 614 protruding from an inner circumference of the first head plate portion 612 in the axial direction and accommodated in the first chamber C1. , a second head plate portion 616 covering the front end of the first annular wall portion 614, and a second head plate portion 616 protruding from the outer circumference of the first head plate portion 612 in the axial direction and surrounding the first annular wall portion 614. An annular wall portion 618 and a flange portion 619 protruding in a radial direction from an outer circumferential portion of the first head plate portion 612 and inserted into the groove 136c may be included.

Here, the first annular wall portion 614 and the second end plate portion 616 form a core chamber V1 accommodating the core 620, and one bottom surface of the core chamber V1 has the discharge port ( 530) may be formed in a cylindrical shape open to the side.

In addition, the first head plate part 612, the first annular wall part 614, and the second annular wall part 618 together with the cap 640 form an oil separation chamber V2 separating oil from the refrigerant. And, the oil separation chamber (V2) extends in the circumferential direction of the core chamber (V1) and may be formed in an annular shape accommodating the core chamber (V1).

In addition, a window 614a that communicates with the core chamber V1 and the oil separation chamber V2 and is opened and closed by the core 620 may be formed in the first annular wall portion 614 .

A guide slit 614b for guiding motion of the core 620 may be further formed in the first annular wall portion 614 .

The guide slit 614b may extend in the movement direction of the core 620 to prevent rotation and abnormal behavior of the core 620 .

In addition, the guide slit 614b is intended to move in a direction in which the core 620 is closer to the discharge port 530 than a predetermined position so as to limit the movement range of the core 620 toward the discharge port 530. It may be formed to limit the movement of the projection 622 to be described later.

In addition, irregularities may be formed on an inner circumferential surface of the second annular wall portion 618 to improve oil separation performance of the oil separation chamber V2.

The unevenness may include a concave portion 618a that is engraved radially outward of the second annular wall portion 618 and a protrusion 618b that protrudes radially inward of the second annular wall portion 618 .

The concave portion 618a may extend in an axial direction of the second annular wall portion 618 .

Also, the concave portion 618a may be formed in plurality, and the plurality of concave portions 618a may be arranged along a circumferential direction of the second annular wall portion 618 .

The protruding portion 618b may be formed parallel to the concave portion 618a.

Also, the protruding portion 618b may be formed between the plurality of concave portions 618a.

The flange portion 619 includes a stepped portion 619a supported by the groove 136c and a preload portion bent toward the fixed scroll 500 based on the stepped portion 619a and supported by the fixed scroll 500 ( 619b) and a cutout 619c formed between the stepped portion 619a and the preload portion 619b.

Here, a plurality of stepped portions 619a may be formed, and the plurality of stepped portions 619a may be arranged in a circumferential direction of the flange portion 619 .

Also, the preload portion 619b may be formed between the plurality of stepped portions 619a.

Also, the cutout 619c may be formed on both sides of the preload portion 619b in the circumferential direction of the flange portion 619 .

The core 620 may be formed in a cylindrical shape having an upper surface opposite to the outlet 530, a side surface opposite to the inner circumferential surface of the first annular wall part 614, and a lower surface opposite to the second end plate part 616. there is.

Further, in the core 620, the axial length of the side surface is between the front end surface of the window 614a at the side of the first head plate part 612 and the second head plate part 616 so as to open and close the window 614a. It may be formed smaller than the axial distance.

The core 620 may include a protrusion 622 protruding from the side surface toward the first annular wall portion 614, and the protrusion 622 may be inserted into the guide slit 614b.

The elastic member 630 may be formed as a coil spring having one end supported on the lower surface of the core 620 and the other end supported on the second end plate 616 .

The cap 640 is formed to cover the front end of the second annular wall portion 618, and the valve outlet 642 and the valve outlet ( 642) may include a screen 644 to collect foreign substances from the refrigerant and oil passing through.

Here, the valve outlets 642 are formed in plurality, the plurality of valve outlets 642 are arranged along the circumferential direction of the cap 640, and the screen 644 is the plurality of valve outlets 642 can be formed each time.

Also, the cap 640 and the screen 644 may be integrally formed by, for example, an insert injection process. In this case, being integrally formed may mean that they are formed as a single product that is not segmented from the beginning, rather than being separately formed and then assembled with each other.

Meanwhile, a non-explained numeral 700 denotes a gasket interposed between the fixed scroll head plate 510 and the barrier rib 136, and 800 denotes a gasket interposed between the second annular wall portion 618 and the barrier rib 136. It is a ring-shaped sealing member, and 618c is a fixing protrusion formed to protrude from the outer circumferential surface of the second annular wall portion 618 to fix the sealing member.

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 volume of the compression chamber may be reduced while continuously moving toward the center side.

Also, the refrigerant introduced into the housing 100 from the outside of the housing 100 may flow into the compression chamber.

In addition, the refrigerant sucked into the compression chamber may be compressed while moving toward the center along the movement path of the compression chamber and discharged through the outlet 530 .

Also, the refrigerant discharged from the outlet 530 flows into the core chamber V1 and may apply force to the upper surface of the core 620 .

And, when the force applied to the upper surface of the core 620 by the refrigerant is greater than the force applied to the lower surface of the core 620 by the elastic member 630, as shown in FIGS. 1 to 3, The core 620 may be moved in a direction away from the outlet 530 to open the window 614a.

Then, the refrigerant introduced into the core chamber V1 may move to the oil separation chamber V2 through the window 614a.

Also, the refrigerant introduced into the oil separation chamber V2 is subjected to cyclonic motion, and the oil contained in the refrigerant is adsorbed to the wall surface of the oil separation chamber V2 and separated from the refrigerant.

The refrigerant and oil separated from each other in the oil separation chamber V2 may be discharged to the first chamber C1 of the rear housing 130 through the valve outlet 642 .

At this time, foreign substances contained in the refrigerant and oil may be collected by the screen 644 .

Here, the relatively low-density refrigerant moves to the upper part of the first chamber C1 through the upper part of the oil separation chamber V2 and the valve outlet on the upper side of the plurality of valve outlets 642, and has a relatively low density. The oil having a large value may be moved to the lower portion of the first chamber C1 through the lower portion of the oil separation chamber V2 and the lower one of the plurality of valve outlets 642 .

Also, the refrigerant distributed over the first chamber C1 may be moved to the second chamber C2 through the first through hole 136a. Also, the refrigerant in the second chamber C2 may be guided to the outside of the housing 100 through the discharge port 138 .

In addition, the oil distributed in the lower portion of the first chamber C1 may be moved to the oil return passage P through the second through hole 136b. Also, the refrigerant in the oil return passage P may be guided to at least one of the motor accommodating space, the back pressure chamber 112b, and the scroll accommodating space.

Meanwhile, when the force applied to the upper surface of the core 620 by the refrigerant is smaller than the force applied to the lower surface of the core 620 by the elastic member 630, as shown in FIGS. 4 to 5 , the core 620 may be moved toward the outlet 530 to close the window 614a.

Then, the movement of the refrigerant from the outlet 530 to the oil separation chamber V2 may be stopped, and the reverse flow of the refrigerant and oil from the oil separation chamber V2 to the outlet 530 may also be stopped.

Meanwhile, when the core 620 tries to move in a direction closer to the discharge port 530 than a predetermined position, the fixed scroll 500 is blocked by the guide slit 614b and the protrusion 622. may not come into contact with

Here, in the scroll compressor according to the present embodiment, the discharge valve 600 opens and closes the window 614a with the core 620 not in contact with the fixed scroll 500 and controls the discharge of the compressed refrigerant. As such, noise generated when the discharge valve 600 strikes the fixed scroll 500 may be prevented.

Also, the discharge valve 600 may be inserted into the first chamber C1 and assembled with the rear housing 130 . Specifically, the flange portion 619 may be inserted into and supported in the groove 136c, and the second annular wall portion 618 may be supported on an inner circumferential surface of the partition wall 136 by the sealing member. Accordingly, since the discharge valve 600 is not fastened to the fixed scroll 500, the fixed scroll 500 is deformed by the force applied to the fixed scroll 500 by the discharge valve 600. this can be suppressed.

Further, as the flange portion 619 includes the stepped portion 619a supported by the groove 136c and the preload portion 619b supported by the fixed scroll 500 and deformable, the fixed scroll ( 500 may be compressed between the barrier rib 136 and the fixed scroll 500 while suppressing deformation. That is, the discharge valve 600 can be stably fixed while the deformation of the fixed scroll 500 is suppressed.

In addition, as the flange portion 619 includes the preload portion 619b, the first hard plate portion 612 may come as close to the fixed scroll 500 as possible. As a result, the dead volume between the discharge port 530 and the discharge valve 600 is minimized, and problems such as re-expansion of the scroll can be suppressed.

Here, the flange portion 619 is formed as close to the fixed scroll 500 as possible within a range in which the force applied to the fixed scroll 500 by the discharge valve 600 is equal to or less than a predetermined value, The first head plate part 612 and the flange part 619 may be formed so that the dead volume between the discharge hole 530 and the discharge valve 600 is 1% or less of the scroll capacity.

In addition, as the cutout 619c is formed at the side of the preload portion 619b, deformation of the preload portion 619b may be facilitated. Accordingly, when the flange portion 619 is compressed between the fixed scroll 500 and the partition wall 136, the force applied by the flange portion 619 to the fixed scroll 500 is further reduced, Deformation of the fixed scroll 500 may be further suppressed. Accordingly, within a range where the deformation of the fixed scroll 500 is suppressed, the distance between the first hard plate portion 612 and the fixed scroll 500 is further reduced, so that the dead volume can be further reduced.

On the other hand, the refrigerant and oil in the first chamber (C1) can leak through the body by the cutout (619c), the sealing member as shown in Figs. By blocking 619c, the possibility of such leakage may be reduced.

And, as described above, the sealing member serves not only to fix the discharge valve 600 to the inner circumferential surface of the partition wall 136 and to prevent leakage through the cutout 619c, but also to prevent the discharge valve 600 from leaking. It can also play a role of suppressing radial vibration of the.

Here, the axial vibration of the discharge valve 600 compresses the flange portion 619, that is, the support structure between the preload portion 619b and the fixed scroll 500 and the stepped portion 619a and the groove ( 136c) can be restrained by a support structure between them.

Meanwhile, since the discharge valve 600 is formed in a so-called core 620 valve shape, the number of parts and manufacturing cost can be reduced compared to the case of having a discharge lead, a valve retainer, and a fastening bolt as in the prior art.

In addition, the discharge valve 600 may perform an oil separation function as it further includes the oil separation chamber V2. Accordingly, manufacturing cost can be further reduced compared to the case of separately providing an oil separator for separating oil as in the prior art.

In addition, as the discharge valve 600 further includes the screen 644, it can even perform a function of removing foreign substances contained in the refrigerant and oil. As a result, manufacturing costs can be further reduced compared to the case of separately providing a screen member for removing foreign substances as in the prior art.

On the other hand, the opening pressure of the discharge valve 600 (the pressure applied to the upper surface of the core 620 when the window 614a is opened) is the opening starting position of the window 614a (of the window 614a in the axial direction). position of the front end surface on the side of the first hard plate part 612) and the elastic force of the elastic member 630. Specifically, in the design stage of the discharge valve 600, the closer the opening start position of the window 614a is set to the discharge port 530, and the elastic modulus (=stress/strain) of the elastic member 630 The smaller is set, the smaller the opening pressure can be set. That is, the window 614a may be opened at a relatively low pressure. On the other hand, as the opening start position of the window 614a is set farther from the outlet 530 and the elastic modulus of the elastic member 630 is set higher, the opening pressure can be set higher. That is, the window 614a may be opened at a relatively high pressure. Using these characteristics, the performance of the scroll compressor can be easily set as needed.

130: rear housing 136: bulkhead
136a: first through hole 136b: second through hole
136c: groove 138: discharge port
200: motor 300: axis of rotation
400: orbiting scroll 500: fixed scroll
530: discharge port 600: discharge valve
610: case 612: first hard plate portion
614: first annular wall portion 614a: window
614b: guide slit 616: second hard plate portion
618: second annular wall portion 618a: recessed portion
618b: protrusion 619: flange portion
619a: stepped portion 619b: preload portion
619c: incision 620: core
622: protrusion 630: elastic member
640: cap 642: valve outlet
644: screen C1: first chamber
C2: second chamber V1: core chamber
V2: oil separation chamber

Claims (15)

motor;
a rotation shaft rotated by the motor;
an orbiting scroll that is pivotally moved by the rotation shaft;
a fixed scroll engaged with the orbiting scroll to form a compression chamber;
a rear housing accommodating the refrigerant discharged from the compression chamber; and
A discharge valve opening and closing the discharge port of the fixed scroll;
The discharge valve includes a case assembled to the rear housing and a core reciprocating inside the case,
The rear housing includes a first chamber, a second chamber accommodating the first chamber and communicating with a discharge port of the rear housing, and a partition wall partitioning the first chamber and the second chamber,
The discharge valve is accommodated in the first chamber scroll compressor. According to claim 1,
The rear housing further includes a first through hole penetrating the partition wall and communicating the first chamber and the second chamber, and a groove formed in a recess at a corner where a front end surface of the partition wall and an inner circumferential surface meet and supporting the discharge valve. include,
A scroll compressor in which an oil separation chamber separating oil from a refrigerant is formed between the bulkhead and the core. According to claim 2,
The case includes an annular first head plate, a first annular wall portion protruding in an axial direction from an inner circumferential portion of the first head plate portion and accommodated in the first chamber, a second head plate portion covering a front end of the first annular wall portion, and A scroll compressor comprising: a second annular wall portion protruding in an axial direction from an outer circumferential portion of the first head plate portion and surrounding the first annular wall portion, and a flange portion protruding radially from the outer circumferential portion of the first head plate portion and being inserted into the groove. According to claim 3,
The flange portion includes a stepped portion supported by the groove and a preload portion supported by the fixed scroll so as to be compressed and fixed between the fixed scroll and the rear housing. According to claim 4,
The flange portion is formed as close to the fixed scroll as possible within a range in which a force applied to the fixed scroll by the discharge valve is equal to or less than a predetermined value. According to claim 4,
The first head plate portion and the flange portion are formed so that a volume between the discharge port and the discharge valve is 1% or less of the scroll capacity. According to claim 4,
The flange portion further includes a cutout formed between the stepped portion and the preload portion to facilitate deformation of the preload portion. According to claim 7,
A sealing member is interposed between the second annular wall portion and the partition wall. According to claim 3,
The first annular wall portion and the second end plate portion form a core chamber accommodating the core;
the first end plate portion, the first annular wall portion and the second annular wall portion form the oil separation chamber;
A scroll compressor having a window formed on the first annular wall portion to communicate the core chamber and the oil separation chamber and to be opened and closed by the core. According to claim 9,
The core includes a protrusion protruding toward the first annular wall portion,
A scroll compressor having a guide slit extending in a movement direction of the core and inserting the protrusion in the first annular wall portion. According to claim 10,
The guide slit is formed to limit the movement of the protrusion when the core is to be moved in a direction closer to the discharge port than a predetermined position. According to claim 9,
A scroll compressor wherein irregularities are formed on an inner circumferential surface of the second annular wall portion. According to claim 9,
The discharge valve further includes a cap covering the front end of the second annular wall,
The cap includes a valve outlet communicating the oil separation chamber and the first chamber and a screen for collecting foreign substances from the refrigerant and oil passing through the valve outlet,
The cap and the screen are integrally formed scroll compressor. According to claim 2,
The rear housing further includes a second through hole passing through the bulkhead and communicating the oil return passage and the first chamber;
The second through-hole is a scroll compressor formed on a gravitational direction side than the first through-hole. According to claim 1,
The discharge valve may include a core chamber communicating with the discharge port and reciprocating inside the core, a window opened and closed by the core, an oil separation chamber separating oil from the refrigerant discharged from the core chamber through the window, the The scroll compressor further comprises a valve outlet for guiding the refrigerant and oil in the oil separation chamber to the outside of the discharge valve, and a screen for collecting foreign substances from the refrigerant and oil passing through the valve outlet.

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