KR20230064057A - Scroll compressor - Google Patents

Abstract

This embodiment relates to a scroll compressor. The scroll compressor according to the present embodiment can be used by minimizing vibration and noise generated when the compressed refrigerant is discharged into the discharge chamber through the rotary valve unit that rotates together with the orbiting scroll.

Description

Scroll compressor {Scroll compressor}

The present invention relates to a scroll compressor, and more particularly, to a scroll compressor in which vibration and noise generated when compressed refrigerant is discharged into a discharge chamber are reduced.

In general, a compressor used in an air conditioning system sucks evaporated refrigerant from an evaporator, changes it to a high-temperature, high-pressure state that is easy to liquefy, and transfers it to a condenser, and the compressor operates to compress the refrigerant transferred via the evaporator.

Compressors include a reciprocating type in which a drive source for compressing refrigerant performs reciprocating motion while performing compression, and a rotary type in which compression is performed while rotating.

The reciprocating type includes a crank type that transmits the driving force of a driving source to a plurality of pistons using a crank, a swash plate type that transmits the driving force to a rotation shaft on which a swash plate is installed, and a wobble plate type that uses a wobble plate.

The rotary type includes a vane rotary type using a rotating rotary shaft and a vane, and a scroll type using a rotating scroll and a fixed scroll.

The scroll compressor has advantages such as high efficiency, low noise, low vibration, and light weight compared to other types of compressors. In particular, when an inverter is installed, overpressure can be automatically prevented when liquid refrigerant or foreign matter is injected into the compressor. It has structural features.

Due to these advantages, the current range of use of the scroll compressor has been expanded to various cooling capacities, and for example, it is used in various ways such as room air conditioners and commercial air conditioners as well as residential air conditioners.

The scroll compressor is provided with two scrolls that are engaged with each other and can rotate relatively. The two scrolls are composed of a fixed scroll and an orbiting scroll. The fixed scroll and the orbiting scroll are composed of a circular end plate and a wrap or spiral element protruding outward from the circular end plate.

The fixed scroll and each spiral element of the orbiting scroll are interlocked with each other, and as the orbiting scroll rotates relative to the fixed scroll, the volume between the spiral element of the orbiting scroll and the spiral element of the fixed scroll is varied while moving. More fluid pockets are formed.

As the orbiting operation of the orbiting scroll proceeds, the fluid pocket moves to the discharge port of the housing and decreases in volume, and the refrigerant fluid in the fluid pocket is compressed and discharged through the discharge port.

The orbiting scroll of the scroll compressor is driven by a driving shaft, and the driving shaft is driven by an external power source. The orbiting scroll is installed eccentrically with respect to the driving shaft via an eccentric bush, and when the driving mechanism is operated, the orbiting scroll rotates eccentrically with respect to the center of the driving shaft by the rotation of the driving shaft. A bearing is interposed between the drive shaft, the eccentric bush, and a rotating contact portion of the orbiting scroll to support stable operation according to high-speed rotation.

The compressor operating in this way needs to be provided with proper lubrication in order to promote smooth operation and durability, and a small amount of oil is contained in the refrigerant fluid for this lubrication.

The refrigerant fluid containing the oil is configured to lubricate the driving shaft, the eccentric bush, and the orbiting scroll while moving. The scroll compressor discharges refrigerant compressed by a fluid pocket, and the compressed refrigerant discharged in this way contains oil for lubrication.

A conventional scroll compressor will be described with reference to the drawings.

1, when the compressed refrigerant compressed by the orbiting scroll 80 is discharged in the conventional scroll compressor, a plate-shaped lid 60 is provided on the outside of the fixed scroll 90, and the lid ( 60) is installed together with the retainer 70, and the compressed refrigerant is discharged while reciprocating to the outside of the fixed scroll 90 according to the discharge of the compressed refrigerant.

The lid 60 continuously reciprocates between the fixed scroll 90 and the retainer 70 while discharging the compressed refrigerant. In this process, noise and vibration caused by impact are generated, which is A solution was needed.

KR 10-2086349

The scroll compressor according to the present embodiment intends to provide a scroll compressor in which noise is reduced by changing the discharge method of the compressed refrigerant in a rotational manner by means of a valve body rotating together with the orbiting scroll.

In order to achieve the above object, the scroll compressor according to an embodiment of the present invention includes a suction chamber in which a refrigerant is sucked, a driving unit for generating a driving force to compress the sucked refrigerant, and the compressed refrigerant. a housing in which a discharge chamber is formed so that the is discharged; Orbiting scroll inserted into the housing; a fixed scroll forming a compression chamber together with the orbiting scroll and having a discharge hole through which compressed refrigerant is discharged; and a rotary valve unit selectively discharging the compressed refrigerant flowing into the discharge hole into the discharge chamber while rotating together with the orbiting scroll.

The rotary valve unit includes a valve body that faces the orbiting scroll and is inserted into a discharge hole formed in the fixed scroll, has a slot hole through which the compressed refrigerant moves, and rotates in the discharge hole.

The rotary valve unit further includes a valve support provided to support the valve body from the outside.

The valve support part may include a support plate installed on an outer surface of the fixed scroll and having a communication hole communicating with the slot hole while being in surface contact with the outer surface of the valve body part; and a coupling pin coupled to the orbiting scroll via the support plate so as to rotate together with the orbiting scroll.

The valve support part further includes a fixing member coupled to the fixed scroll via the support plate so that the support plate is fixed to the fixed scroll.

The communication hole is opened with a relatively small size at a position facing the discharge hole formed in the fixed scroll in the axial direction.

The communication hole is opened at a position spaced outward in a radial direction based on the center of the discharge hole.

The discharge hole and the communication hole may move the compressed refrigerant when the valve body part rotates and coincides with each other in an axial direction.

The maximum cross-sectional area of the channel discharged from the fixed scroll to the discharge chamber corresponds to the cross-sectional area of the communication hole or the cross-sectional area of the slot hole minus the cross-sectional area of the communication hole.

The slot hole is opened to a predetermined length along the circumferential direction at a position eccentric outward in the radial direction with respect to the center of the valve body, and the position of the slot hole changes to different positions according to the turning motion of the orbiting scroll characterized by

The slot hole and the communication hole remain spaced apart from each other when the orbiting scroll is stopped.

When the orbiting scroll is stopped, the rotational valve unit maintains a first state in which the discharge of the refrigerant is blocked because the slot hole is positioned facing the opposite surface of the support plate except for the open area of the communication hole. When the orbiting scroll is rotated at a first rotational angle, a second state in which the refrigerant is discharged to the first communication area S1 in which the slot hole partially communicates with the communication hole is maintained.

In addition, when the orbiting scroll is rotated at a second rotational angle, a third state in which the refrigerant is discharged to the second communication area S2 in which the slot hole communicates with the communication hole in the entire area is maintained, and the orbiting scroll When rotated at a third rotation angle, a fourth state in which the sled hole is positioned at a position communicating with the communication hole through a third communication area (S3) communicating with an area smaller than the third state is maintained. .

The rotational angle of the orbiting scroll increases from the first rotational angle to the second to third rotational angles.

The orbiting scroll maintains a state in which one end is supported by the rotary shaft provided in the driving unit and the other end is supported by the rotary valve unit.

The rotary valve unit may further include a sealing member interposed between the fixed scroll and the support plate to prevent leakage of refrigerant to an outer surface of the fixed scroll.

The sealing member includes a first sealing member provided between the support plate and the fixed scroll.

The rotary valve unit further includes a flat bearing inserted into the discharge hole and relatively rotated with the valve body.

In this embodiment, the scroll compressor can be operated in a different way from the conventional method by changing the compressed refrigerant to be moved in conjunction with the rotation of the valve body when the compressed refrigerant is discharged into the discharge chamber.

This embodiment can reduce vibration and noise generated when the compressed refrigerant is discharged into the discharge chamber.

This embodiment can support the orbiting scroll on both sides in the axial direction, so that stable operation and durability of the scroll compressor can be improved.

1 is a longitudinal sectional view showing a conventional scroll compressor;
2 is a view showing a lid and a retainer provided in a conventional scroll compressor;
Figure 3 is a longitudinal cross-sectional view showing a scroll compressor according to the present embodiment.
4 is an exploded perspective view showing a rotary valve unit according to the present embodiment;
5 is a front view showing a valve body according to the present embodiment;
6 is a coupled cross-sectional view showing a state in which the rotary valve unit according to the present embodiment is installed in a scroll compressor.
7 is an operating state diagram of the rotary valve unit according to the present embodiment.
8 is a view showing a scroll compressor according to another embodiment of the present invention.
9 is a view showing a plain bearing provided in the rotary valve unit.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. The thickness of lines or the size of components shown in the accompanying drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention of a user or operator or a precedent. Therefore, definitions of these terms should be made based on the content throughout this specification.

Hereinafter, a scroll compressor according to a first embodiment of the present invention will be described with reference to the drawings. For reference, FIG. 3 is a longitudinal cross-sectional view showing a scroll compressor according to this embodiment, FIG. 4 is an exploded perspective view showing a rotary valve unit according to this embodiment, and FIG. 5 shows a valve body according to this embodiment. It is a front view, and FIG. 6 is a combined cross-sectional view showing a state in which the rotary valve unit according to the present embodiment is installed in the scroll compressor.

3 to 6, in the scroll compressor 1 according to the present embodiment, when the compressed refrigerant compressed by the orbiting scroll 30 to be described later is discharged, the vibration noise generated by the reciprocating motion of the lid plate In order to prevent this, it is possible to improve the vibration and noise phenomenon caused by the discharge of the compressed refrigerant by installing the rotary valve unit 100 that rotates together with the orbiting scroll 30.

To this end, the scroll compressor 1 according to the present embodiment has a suction chamber 12 in which the refrigerant is sucked, a driving unit 2 for generating a driving force to compress the sucked refrigerant, and the compressed refrigerant. A compression chamber 42 is formed together with the housing 100 in which the discharge chamber 52 is formed to discharge, the orbiting scroll 30 inserted into the housing 100, and the orbiting scroll 30, As the rotational motion is performed together with the orbiting scroll 30 and the fixed scroll 40 having a discharge hole 44 through which the compressed refrigerant is discharged, the compressed refrigerant flowing into the discharge hole 44 is selectively discharged into the discharge chamber 52 ) and a rotary valve unit 100 for discharging.

For example, the housing 10 according to this embodiment has a suction chamber 12 formed therein, a front housing 10 equipped with a driving unit 2 generating driving force, and facing the front housing 10, It may be composed of a center housing 20 coupled to the back pressure chamber 22 formed therein, and a rear housing 50 coupled to the center housing 20 and having a discharge chamber 52 formed therein, but the above configuration It should be noted that it is not necessarily limited to .

The scroll compressor 1 forms an overall appearance and is composed of a front housing 10, a center housing 20, and a rear housing 50 in a direction from right to left based on the drawing.

A suction chamber 12 having a predetermined volume is formed inside the front housing 10 , and a driving unit 2 is provided in an axial direction at an inner center of the front housing 10 .

The drive unit 2 includes a stator 2a located in the inner circumferential direction of the front housing 10, a rotor 2b rotated by interaction with the stator 2a inside the stator 2a, and the It is fastened to the rotor 2b and includes a rotating shaft 2c extending through the center of the front housing 10 .

The stator 2a and the rotor 2b are accommodated in the suction chamber 12, and the rotating shaft 2c passes through the center housing 20 to move the orbiting scroll 30 in the suction chamber 12. It extends toward, and the extended end is connected to the orbiting scroll 30.

The orbiting scroll 30 compresses the refrigerant while being rotated at a predetermined speed by the rotation of the rotary shaft 2c.

The center housing 20 faces and is coupled to the front housing 10, a back pressure chamber 22 is formed therein, and oil for lubrication is supplied to the back pressure chamber 22.

The center housing 20 may communicate with a refrigerant intake pipe (not shown) for guiding refrigerant from the outside of the compressor 1 to the suction chamber 12 .

The rear housing 50 is in close contact with the left side of the center housing 20 based on the drawing, and is selectively detachably mounted to the center housing 20 . The refrigerant discharged through the orbiting scroll 30 and the fixed scroll 40 is discharged toward the discharge chamber 52 via the back pressure chamber 22 at a predetermined pressure.

Since the refrigerant is discharged with a predetermined pressure when the refrigerant is discharged into the discharge chamber 52, the rear housing 50 is formed in a structure that partially protrudes outward with a predetermined length.

The fixed scroll 40 is disposed to face the orbiting scroll 30, and compression of the refrigerant is performed while the orbiting scroll 30 rotates with respect to the fixed scroll 40 at a predetermined speed. The fixed scroll 40 forms a compression chamber 42 together with the orbiting scroll 30 .

The rotary valve unit 100 according to the present embodiment does not operate in a reciprocating manner to the outside of the fixed scroll 40 when the compressed refrigerant is discharged like a conventional lid plate, but rotates together with the orbiting scroll 30 and Silent scroll compression (1 ) becomes possible.

The rotary valve unit 100 faces the orbiting scroll 30 and is inserted into the discharge hole 44 formed in the fixed scroll 40, and a slot hole 112 is formed to move the compressed refrigerant and the discharge hole 112 is formed. It includes a valve body portion 110 in which a pivoting movement is made inside the hole 44 .

And, the rotary valve unit 100 further includes a valve support part 130 provided to support the valve body part 110 from the outside. The rotary valve unit 100 can be stably supported through the valve support part 130 when the valve body part 110 is rotated, and the components shown in the figures are shown as an example, and the valve body part It can be variously changed into other shapes for stable rotational operation of (110).

For example, the valve support part 130 according to this embodiment is installed on the outer surface of the fixed scroll 40 and communicates with the slot hole in a state of surface contact with the outer surface of the valve body part 110. It includes a support plate 132 on which 132a is formed, and a coupling pin 134 coupled to the orbiting scroll 30 via the support plate 132 so as to rotate together with the orbiting scroll 30.

In addition, the rotary valve unit 100 is provided with a fixing member 136 coupled to the fixed scroll 40 via the support plate 132 so that the support plate 132 is fixed to the fixed scroll 40. .

The communication hole 132a is formed at a position facing the discharge hole 44 formed in the fixed scroll 40 in the axial direction, so that when the compressed refrigerant is discharged through the discharge hole 44, the movement path is shortened and pressure is reduced. Problems caused by descent are also minimized.

As shown in the drawings, the valve body 110 is formed in a cylindrical shape to be rotated in the discharge hole 44, but may be changed into another shape if stable rotation is possible.

The slot hole 112 is opened to a predetermined length along the circumferential direction at a position eccentric outward in the radial direction based on the center of the valve body portion 110, and has a circumferential length greater than the radial length L1 ( L2) is extended relatively long.

The slot hole 112 is formed, for example, as an elliptical slot with a long length L2 in the circumferential direction and is rounded with a predetermined curvature on the inside, so that resistance generated when the compressed refrigerant is moved is minimized.

The support plate 132 according to this embodiment is shown in the form of a plate, but may be changed to other forms, and is installed on the outer surface of the fixed scroll 40, and the fixed scroll 40 via the fixing member 136 to be described later. Since it is installed in close contact with the outer side of the valve body 110 can be stably supported even when rotation occurs.

A communication hole 132a is formed in the support plate 132 to communicate with the slot hole 112 , and the communication hole 132a has a relatively larger diameter than the slot hole 112 .

The reason why the communication hole 132a is formed in this way is that when the compressed refrigerant moves through the slot hole 112, the open area of the communication hole 132a must be larger than the open area of the slot hole 112 for compression. This is to minimize resistance caused by the movement of the refrigerant and to reduce vibration and noise caused by the movement.

When the valve body 110 is rotated by the orbiting scroll 30, the discharge hole 44 and the communication hole 132a are aligned in the axial direction at a specific rotation angle, and the compressed refrigerant moves while communicating with each other. this will be done

Since the communication hole 132a according to the present embodiment is opened in a relatively small size at a position facing the discharge hole 44 formed in the fixed scroll 40 in the axial direction, the compressed refrigerant can be smoothly discharged.

For example, the communication hole 132a is opened at a position spaced outward in a radial direction based on the center of the discharge hole 44 . The reason why the communication hole 132a is positioned in this way is that the valve body 110 is rotated together with the orbiting scroll 30 and discharged when the compressed refrigerant is maximally compressed, considering the characteristics of the scroll compressor. are located together

When the discharge hole 44 and the communication hole 132a coincide in the axial direction as the valve body 110 rotates, the compressed refrigerant is moved and discharged according to the open area of the communication hole 132a. The amount of compressed refrigerant can be adjusted.

The maximum cross-sectional area of the passage discharged from the fixed scroll 40 to the discharge chamber 52 is the cross-sectional area of the communication hole 132a or the cross-sectional area of the slot hole 112 minus the cross-sectional area of the communication hole 132a. applies to When the open area of the communication hole 132a is changed, the discharge amount of the compressed refrigerant can be adjusted, so that the design can be changed in various ways according to the type of scroll compressor.

The slot hole 112 is opened to a predetermined length along the circumferential direction at a position eccentric outward in the radial direction based on the center of the valve body part 110, and according to the turning motion of the orbiting scroll 30 The positions of the slotted holes 112 are changed to different positions. That is, the slot hole 112 is not always positioned at the correct position, but changes according to the rotation of the valve body 110 and maintains communication with the aforementioned communication hole 132a.

The slot hole 112 and the communication hole 132a remain spaced apart from each other when the orbiting scroll 30 is stopped, but when the scroll compressor is stopped, they do not communicate with each other, blocking the movement of refrigerant. do.

The coupling pin 134 is located at a position eccentric to one side with respect to the center of the valve body 110 and is coupled to the orbiting scroll 30 . A pin hole 31 is formed in the orbiting scroll 30 so that the coupling pin 134 is coupled thereto.

For example, the coupling pin 134 is formed with a first screw thread (not shown) in the outer length direction so as to be stably coupled to the orbiting scroll 30, and the first screw thread and the pin hole 31 of the orbiting scroll 30 A second screw thread (not shown) to be coupled may be formed and fixed to each other in a screwing manner.

The coupling pin 134 is formed in a direction opposite to the rotational direction of the orbiting scroll 30 in the coupling direction of the first screw thread, so that the coupling pin 134 is prevented from loosening due to long-term rotation.

The fixing member 136 may be a bolt, pin, or other member fixable to the fixed scroll 40, and is not particularly limited to the member shown in the drawings.

The aforementioned slot hole 112 and the communication hole 132a are kept spaced apart so as not to face each other when the orbiting scroll 30 is stopped.

An operating state of the rotary valve unit according to the present embodiment will be described with reference to the drawings.

Referring to attached FIG. 7 , when the orbiting scroll 30 is in a stopped state, the rotary valve unit 100 has the slot hole 112 on the support plate 132 excluding the open area of the communication hole 132a. ) is positioned facing the opposite surface of the refrigerant, and the first state in which the discharge of the refrigerant is blocked is maintained.

And, when the orbiting scroll 30 is rotated at a first rotational angle, the slot hole 112 partially communicates with the communication hole 132a to the first communication area S1 where the refrigerant starts to be discharged at a second time. state is maintained, and when the orbiting scroll 30 is rotated at the second rotation angle, the refrigerant is discharged to the second communication area S2 in which the slot hole 112 communicates with the communication hole 132a in the entire area. The third state in which this is achieved is maintained.

In addition, when the orbiting scroll 30 is rotated at a third rotation angle, the sled hole 112 communicates with the communication hole 132a through a third communication area S3 communicating with an area smaller than that of the third state. A fourth state of being located at the position is maintained.

In the rotational valve unit 100, since the orbiting scroll 30 is not rotated in the first state, the slot hole 112 does not communicate with the discharge hole 44 and the communication hole 132a, so that the refrigerant is discharged. don't lose

In the second state, while the orbiting scroll 30 is rotated at an angle of 90 degrees corresponding to the first rotation angle, the slot hole 112 is partially communicated with the communication hole 132a through the first communication area S1, thereby dispersing the refrigerant. discharge begins. In the second state of the rotary valve unit 100, the slot hole 112 coincides with the communication hole 132a only by the first communication area S1 shown in the drawing.

In the third state, the orbiting scroll 30 is rotated at an angle of 180 degrees corresponding to the second rotation angle, and the slot hole 112 coincides with the communication hole 132a in the entire area of the second communication area S2. status is maintained In this case, the compressed refrigerant may be moved to the discharge chamber 52 via the communication hole 132a through the entire open area of the slot hole 112 .

When the compressed refrigerant is moved to the communication hole 132a through the slot hole 112, the communication hole 132a has a relatively larger diameter than the slot hole 112, so vibration and noise are prevented. .

In particular, the rotary valve unit 100 has a configuration in which rotational motion is performed together with the orbiting scroll 30, and vibration and noise due to hitting noise are prevented from occurring compared to the prior art in which reciprocating motion is performed to the outside of the fixed scroll 40, so that the swash plate compressor The noise reduction effect according to the operation of is improved.

In the fourth state, the orbiting scroll 30 is rotated at an angle of 270 degrees, and the slot hole 112 is connected to the communication hole 132a in a third communication area S3 similar to the first communication area S1 described above. communicated

In this way, the rotary valve unit 100 rotates together with the orbiting scroll 30 and coincides with the compression process of the orbiting scroll 30 rotating relative to the fixed scroll 40 to stably discharge the compressed refrigerant. .

The orbiting scroll 30 is operated so that the rotational angle increases from the first rotational angle to the second to third rotational angles.

The orbiting scroll 30 maintains a state in which one end is supported by the rotary shaft 2c provided in the driving unit 2 and the other end is supported by the rotary valve unit 100 . When the other end of the orbiting scroll 30 is supported by the rotary valve unit 100 rather than being maintained only on the rotary shaft 2c, the phenomenon of eccentricity relative to the rotary shaft 2c is reduced and stable rotation occurs. Over-vibration and noise generation can be minimized.

The supporting force of the orbiting scroll 30 at a position coupled to the rotary shaft 2c is relatively greater than the supporting force at a position where the rotary valve unit 100 is installed.

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

Referring to FIG. 3 or 8, the rotary valve unit 100 according to the present embodiment is interposed between the fixed scroll 40 and the support plate 132 so that the refrigerant flows toward the outer surface of the fixed scroll 40. It further includes a sealing member 150 provided to prevent leakage of.

This embodiment is intended to be used by preventing leakage due to the movement of the compressed refrigerant through the sealing member 150. The sealing member 150 has a size corresponding to that of the support plate 132 described above, but is not necessarily limited to a corresponding size.

For example, the sealing member 150 includes a first sealing member 152 provided between the support plate 132 and the fixed scroll 40 .

As the first sealing member 152, for example, a gasket positioned on the support plate 132 and the fixed scroll 40 is used. The gasket is configured in the form of rubber coating on steel having a predetermined thickness, closely adheres to the outer surface of the valve body 110, and has a gasket hole formed at a position corresponding to the communication hole 132a, thereby communicating the communication. Stable movement of the compressed refrigerant through the hole 132a is achieved.

The first sealing member 152 has a mounting hole 152a into which the fixing member 136 is inserted, so that the fixed state by the support plate 132 is stably maintained.

The first sealing member 152 may also use an O-ring other than the aforementioned gasket type, and in this case, the O-ring insertion groove is formed inside the support plate 132 .

Referring to attached FIG. 9 , this embodiment is inserted into the discharge hole 44 of the rotary valve unit 100 instead of the above-described first sealing member 152 and relatively rotates with the valve body part 110 It further includes a plain bearing 154 provided to achieve this.

The plane bearing 154 may be configured to rotate relative to the valve body 110 .

In another embodiment, a coating layer may be formed on the inside of the discharge hole 44 to prevent wear and sliding caused by rotation of the valve body 110 . The coating layer may be subjected to Teflon coating or resin coating, for example, and other coating methods may also be used.

One embodiment of the present invention described above and shown in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and change the technical idea of the present invention in various forms. Therefore, as long as these improvements and changes are obvious to those skilled in the art, they will fall within the scope of the present invention.

10: front housing
12: suction chamber
20: center housing
22: back pressure chamber
30: turning scroll
40 : fixed scroll
44: discharge hole
50: rear housing
100: rotary valve unit
110: valve body
112: slot hole
130: valve support
132: support plate
134: coupling pin
132a: communication hole
136: fixing member
150: sealing member
152: first sealing member

Claims (17)

a housing having a suction chamber in which the refrigerant is sucked, a driving unit generating a driving force to compress the sucked refrigerant, and a discharge chamber through which the compressed refrigerant is discharged;
Orbiting scroll inserted into the housing;
a fixed scroll forming a compression chamber together with the orbiting scroll and having a discharge hole through which compressed refrigerant is discharged; and
and a rotary valve unit configured to selectively discharge the compressed refrigerant flowing into the discharge hole into the discharge chamber while rotating together with the orbiting scroll. According to claim 1,
The rotary valve unit is inserted into a discharge hole formed in the fixed scroll facing the orbiting scroll, a slot hole is formed to move the compressed refrigerant, and a valve body portion in which a rotation movement is performed inside the discharge hole Scroll compressor. According to claim 2,
The rotary valve unit further comprises a valve support provided to support the valve body from the outside of the scroll compressor. According to claim 3,
The valve support part may include a support plate installed on an outer surface of the fixed scroll and having a communication hole communicating with the slot hole while being in surface contact with the outer surface of the valve body part;
A scroll compressor comprising a coupling pin coupled to the orbiting scroll via the support plate so as to rotate together with the orbiting scroll. According to claim 4,
The scroll compressor further comprises a fixing member coupled to the fixed scroll via the support plate so that the support plate is fixed to the fixed scroll in the valve support part. According to claim 4,
The communication hole is opened to a relatively small size at a position facing the discharge hole formed in the fixed scroll in the axial direction of the scroll compressor. According to claim 4,
The communication hole is opened at a position spaced outward in a radial direction based on the center of the discharge hole scroll compressor. According to claim 7,
A scroll compressor in which the compressed refrigerant moves when the discharge hole and the communication hole coincide in an axial direction while the valve body rotates. According to claim 7,
The maximum cross-sectional area of the passage discharged from the fixed scroll to the discharge chamber corresponds to an area obtained by subtracting the cross-sectional area of the communication hole from the cross-sectional area of the communication hole or the cross-sectional area of the slot hole. According to claim 2,
The slot hole is opened to a predetermined length along the circumferential direction at a position eccentric outward in the radial direction with respect to the center of the valve body, and the position of the slot hole changes to different positions according to the turning motion of the orbiting scroll scroll compressor. According to claim 7,
The slot hole and the communication hole are kept spaced apart from each other in a state in which the orbiting scroll is stopped. According to claim 7,
When the orbiting scroll is stopped, the rotational valve unit maintains a first state in which the discharge of the refrigerant is blocked because the slot hole is positioned facing the opposite surface of the support plate except for the open area of the communication hole. become,
When the orbiting scroll is rotated at a first rotation angle, a second state in which the refrigerant is discharged to the first communication area S1 in which the slot hole partially communicates with the communication hole is maintained,
When the orbiting scroll is rotated at a second rotational angle, a third state in which the refrigerant is discharged to the second communication area S2 in which the slot hole communicates with the communication hole in the entire area is maintained,
When the orbiting scroll is rotated at a third rotation angle, a fourth state in which the sled hole is positioned at a position communicating with the communication hole through a third communication area S3 communicating with an area smaller than the third state is maintained. scroll compressor. According to claim 1,
A scroll compressor in which the rotational angle of the orbiting scroll increases from a first rotational angle to second to third rotational angles. According to claim 1,
The orbiting scroll is a scroll compressor in which one end is supported on a rotating shaft provided in the driving unit and the other end is maintained by the rotary valve unit. According to claim 4,
The rotary valve unit further includes a sealing member interposed between the fixed scroll and the support plate to prevent leakage of refrigerant to an outer surface of the fixed scroll. According to claim 15,
The sealing member includes a first sealing member provided between the support plate and the fixed scroll scroll compressor. According to claim 14,
The rotary valve unit further includes a flat bearing inserted into the discharge hole and relatively rotated with the valve body.

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