KR102284366B1 - Compressor - Google Patents

Abstract

The present invention relates to a compressor with high efficiency and reduced vibration by maintaining a constant rotational frequency even under a low load condition, which provides an internal space and has a suction part through which refrigerant is sucked into the internal space and a discharge unit through which the sucked refrigerant is discharged a cylinder to be used, a roller for compressing the refrigerant while rotating eccentrically in the inner space, a first vane provided between the suction part and the discharge part and contacting the roller to partition the inner space, spaced apart from the first vane and divided by the first vane A compressor comprising: a second vane in contact with the roller to divide any one of the spaced spaces into a first area and a second area; and a valve assembly for selectively communicating the first area with any one of the second area and the outside of the cylinder provides

Description

Compressor {COMPRESSOR}

The present invention relates to a compressor, and more particularly, to a compressor having high efficiency and reduced vibration under a low load condition.

In general, a compressor is applied to a vapor compression type refrigeration cycle (hereinafter, abbreviated as a refrigeration cycle) such as a refrigerator or an air conditioner. As the compressor, a constant-speed compressor driven at a constant speed or an inverter-type compressor whose rotational speed is controlled has been introduced.

In the case of a compressor, a case in which a drive motor, which is a normal electric motor, and a compression part operated by the drive motor are installed together in the inner space of a sealed casing is called a closed compressor, and a case in which the drive motor is separately installed outside the casing is called an open compressor. can do. Most refrigeration appliances for home or business use a hermetic compressor.

In addition, the compressor may be classified into a reciprocating type, a scroll type, a rotary type, etc. according to a method of compressing the refrigerant. Here, the rotary compressor is a method of compressing the refrigerant using a roller performing eccentric rotation in the compression space of the cylinder and a vane that divides the compression space of the cylinder into a suction chamber and a discharge chamber in contact with the roller.

Recently, a variable capacity rotary compressor capable of varying the refrigeration capacity of the compressor according to a change in load has been introduced. This is because, when the compressor is operated at a low speed under a low load condition, not only the efficiency is reduced, but also the vibration caused by the low speed operation is increased.

As a technology for changing the refrigeration capacity of a compressor, there are a technology of applying an inverter motor and a technology of changing the refrigeration capacity by so-called exclusion volume switching, which changes the volume of the compression chamber by bypassing a part of the compressed refrigerant to the outside of the cylinder. is known

However, when an inverter motor is applied, the price of a driver for driving the inverter motor is usually very expensive compared to a driver of a constant speed motor, and there is a problem in that the production cost of the compressor is increased.

In addition, when the refrigerant is bypassed, the piping system becomes complicated, and as the flow resistance of the refrigerant increases, the efficiency of the compressor decreases.

In addition, in order to obtain a desired flow rate of the bypassed refrigerant, there is a problem in that the overall volume of the piping system must be increased due to the flow resistance of the refrigerant.

Furthermore, since it is impossible to control the flow rate of the bypassed refrigerant, it is always bypassed, so there is a problem that is no different from operating a compressor with a small volume of the compression chamber.

An object of the present invention is to provide a compressor with high efficiency and reduced vibration by maintaining a constant rotation frequency even under a low load condition.

An object of the present invention is to provide a compressor in which the exclusion volume is adjusted by adjusting the distance between the first vane and the second vane.

In order to solve the above problems, the present invention provides an internal space, the cylinder having a suction part through which the refrigerant is sucked into the inner space and a discharge part through which the sucked refrigerant is discharged; a roller for compressing the refrigerant while rotating eccentrically in the inner space; a first vane provided between the suction unit and the discharge unit and in contact with the roller to partition the inner space; a second vane provided spaced apart from the first vane and contacting the roller to divide any one of the spaces partitioned by the first vane into a first area and a second area; and a valve assembly selectively communicating the first region with any one of the second region and the outside of the cylinder.

The roller may rotate eccentrically through the first region and the second region sequentially.

Compression of the first region and expansion of the second region may be sequentially performed by eccentric rotation of the roller.

The suction part may be selectively disposed in the first area.

The discharge part may be selectively disposed in the second area.

The suction unit may be provided on a side in a direction in which the roller rotates of the first vane, and the discharge unit may be provided on a side opposite to a direction in which the roller rotates of the first vane.

In the first region, suction and discharge of refrigerant may be performed by eccentric rotation of the roller.

In the second region, suction of the refrigerant may be selectively performed by eccentric rotation of the roller.

The valve assembly includes a three-way valve; a first connection pipe connecting the three-way valve and the first region; a second connection pipe connecting the three-way valve and the second region; It may include; a third connection pipe for communicating the three-way valve and the outside of the cylinder.

The cylinder may include: a first through part communicating the outside with the first area; and a second through-portion communicating the outside with the second region, wherein the first connector may be connected to the first through-port, and the second connecting pipe may be connected to the second through.

The three-way valve may selectively connect the first connection pipe to the third connection pipe or the second connection pipe.

The first through portion and the second through portion may be provided adjacent to the second vane.

The discharge part may be provided adjacent to the first vane.

The second vane may be provided to be spaced apart from the first vane by a preset rotational angle along the rotational direction of the roller so that the volume of the space compressed by the rotation of the roller corresponds to a preset volume.

The present invention has the effect of providing a compressor with high efficiency and reduced vibration by maintaining a constant rotation frequency even under a low load condition.

The present invention has the effect of providing a compressor in which the exclusion volume is controlled by adjusting the distance between the first vane and the second vane.

1 is a partial longitudinal cross-sectional view showing a compressor according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view illustrating the compressor shown in FIG. 1 .
3 to 5 are transverse cross-sectional views sequentially illustrating compression and discharge of a refrigerant as the rollers of the compressor revolve according to an embodiment of the present invention.

It should be understood that the embodiments described below are illustratively shown to help understanding of the invention, and that the present invention may be implemented with various modifications different from the embodiments described herein. However, in the description of the present invention, if it is determined that a detailed description of a related known function or component may unnecessarily obscure the gist of the present invention, the detailed description and detailed illustration thereof will be omitted. In addition, the accompanying drawings are not drawn to scale in order to help understanding of the invention, but dimensions of some components may be exaggerated.

The first and second terms used in the present application may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one constituent from another.

In addition, the terms used in the present application are only used to describe specific embodiments, and are not intended to limit the scope of rights. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this application, terms such as "comprises", "consisting of" or "consisting It is to be understood that this does not preclude in advance the possibility of the presence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

1 is a partial longitudinal cross-sectional view showing a compressor 1 according to an embodiment of the present invention.

Referring to FIG. 1 , a compressor 1 according to an embodiment of the present invention includes a case, a power generating unit positioned inside the case, and a compression unit.

Although the power generating unit 300 is shown in FIG. 1 as being disposed on the upper part of the compressor 1 and the compression part 100 being disposed on the lower part of the compressor 1, this is only an embodiment and their positions as needed can be interchanged with each other.

The case 11 is formed in a cylindrical shape with an open upper and lower portions, and a closed inner space is formed as the upper cap 12 and the lower cap 13 are installed in the open upper and lower portions, respectively.

The case 11 is provided with a suction pipe 16 for sucking the working fluid, that is, the refrigerant on one side. The suction pipe 16 is connected to the accumulator 15 that separates the lubricant from the refrigerant to supply the refrigerant to the case.

The upper cap 12 is formed to seal the open upper part of the case 11 . In the upper cap 12 , a discharge pipe through which the compressed fluid is discharged is installed through the center of the upper cap 12 , and a terminal 17 for receiving power from the outside is installed.

The lower cap 13 is also formed to seal the open lower part of the case 11 , and is filled with a certain amount of lubricant O for lubrication and cooling of the friction-moving member such as the drive shaft 330 . Here, the end of the drive shaft 330 is immersed in the lubricant (O).

The power generating unit 300 includes a stator 310 fixed to the case 11 , a rotor 350 rotatably supported inside the stator 310 , and a drive shaft 330 press-fitted into the rotor 350 . .

The stator 310 is supplied with power from the outside through a terminal 17 installed on the upper cap 12 . When power is supplied to the stator 310, the rotor 350 rotates by electromagnetic force.

The driving shaft 330 passes through the rotor 350 and transmits the rotational force of the rotor 350 to the compression unit 100 . On the other hand, the driving shaft 330 is provided with an eccentric portion 331 on which the outer peripheral surface is formed to protrude in order to eccentrically rotate the roller 130, which will be described later.

The compression unit 100 includes a cylinder 110 fixed to the case 11 , a roller 130 positioned inside the cylinder 110 , a first vane 121 and a second partitioning an inner space of the cylinder 110 . The space partitioned by the vane 124 , the upper bearing 150 installed in the upper part of the cylinder 110 , the lower bearing 170 installed in the lower part of the cylinder 110 and the second vane 124 is selectively communicated It includes a valve assembly (500).

This compression unit 100 will be described in more detail with reference to FIG. 2 . FIG. 2 is an exploded perspective view showing the compressor 1 shown in FIG. 1 .

Referring to FIG. 2 , the cylinder 110 is formed in a cylindrical shape in which an internal space of a predetermined size is formed in the central portion, and is made of a material having sufficient strength to withstand the pressure of the compressed fluid.

The eccentric portion 331 formed on the drive shaft 330 is accommodated in the inner space of the cylinder 110 . Here, the eccentric part 331 is a kind of eccentric cam formed to have a center spaced apart by a predetermined distance from the rotation center of the driving shaft 330 .

A first vane slit 123 and a second vane slit 126 extending by a predetermined depth in a direction away from the center of the cylinder 110 are formed on the inner circumferential surface of the cylinder 110 . The first vane slit 123 and the second vane slit 126 accommodate the first vane 121 and the second vane 124 , respectively. When the first vane slit 123 and the second vane slit 126 are accommodated in the first vane 121 and the second vane 124, the ends of the first vane 121 and the second vane 124 are cylinders ( 110) is formed to have a sufficient depth so as not to protrude onto the inner circumferential surface.

The cylinder 110 is provided with a suction unit 113 for sucking the refrigerant and a discharge unit 115 for discharging the refrigerant.

The suction part 113 is adjacent to one side of the first vane slit 123 , and the discharge part 115 is provided adjacent to the other side located in the opposite direction to one side of the first vane slit 123 . That is, the suction unit 113 and the discharge unit 115 are provided adjacent to each other with the first vane 121 interposed therebetween. The suction unit 113 and the discharge unit 115 are disposed to sequentially pass through the discharge unit 115 , the first vane slit 123 , and the suction unit 113 while the roller 130 rotates.

The suction part 113 is formed to pass through the outer circumferential surface and the inner circumferential surface of the cylinder 110 , and the refrigerant transferred from the suction pipe 16 connected to the accumulator 15 is sucked into the inner space of the cylinder 110 .

The discharge part 115 is made of a groove formed on the inner circumferential surface of the cylinder 110 and is connected to a discharge pipe 153 to be described later so that the refrigerant is discharged.

In addition, the cylinder 110 is provided with a first through portion 117 for discharging the refrigerant and a second through portion 118 for allowing the refrigerant discharged through the first through portion 117 to be sucked again.

The first through portion 117 is adjacent to one side of the second vane slit 126 and is formed to penetrate the outer and inner peripheral surfaces of the cylinder 110 . The first through part 117 is connected to a first connection pipe 510 which will be described later.

The second through portion 118 is adjacent to the other side positioned in the opposite direction to one side of the second vane slit 126 , and is formed to pass through the outer circumferential surface and the inner circumferential surface of the cylinder 110 . The second through part 118 is connected to a second connection pipe 520 which will be described later.

Here, one side of the second vane slit 126 is formed to face in a direction opposite to the direction of rotation of the roller 130 , and the other side of the second vane slit 126 is formed to face in the direction of rotation of the roller 130 .

On the other hand, on the inner peripheral surface of the cylinder 110, as shown in FIG. 3, starting with the first vane slit 123, the suction part 113, the first through part 117, and the second vane along the counterclockwise direction in the drawing. A slit 126 , a second through portion 118 and a discharge portion 115 are provided.

The roller 130 is a ring member having an outer diameter smaller than the inner diameter of the cylinder 110 . The roller 130 is in contact with the inner circumferential surface of the cylinder 110 , and is rotatably coupled to the eccentric portion 331 so as to be eccentrically rotatable about the driving shaft 330 in the inner space of the cylinder 110 .

Therefore, the roller 130 rotates while the inner peripheral surface of the roller 130 slides on the outer peripheral surface of the eccentric part 331 when the driving shaft 330 rotates. At the same time, the roller 130 revolves with the center of the roller 130 being spaced apart from the rotation center C of the drive shaft 330 by a predetermined distance. At this time, the roller 130 rolls on the inner circumferential surface of the cylinder 110 due to rotation during revolution.

As the roller 130 is disposed in the inner space of the cylinder 110 , the inner space excluding the volume occupied by the roller 130 is used for suction and compression of the refrigerant. Hereinafter, the inner space refers to a space excluding the volume occupied by the roller 130 among the inner space of the cylinder 110 unless otherwise specified.

The first vane 121 is accommodated in the first vane slit 123 and is elastically supported by the first elastic member 122 accommodated in the first vane slit 123 . Since the first vane 121 is pushed toward the roller 130 by the first elastic member 122 , it maintains contact with the outer peripheral surface of the roller 130 despite the eccentric rotation of the roller 130 .

Accordingly, when the first vane 121 is installed alone, the inner space of the cylinder 110 is divided into two independent spaces by the first vane 121 . During rotation of the drive shaft 330 , that is, during revolution of the roller 130 , the size of each space partitioned by the first vane 121 changes but is complementary. That is, when the roller 130 rotates, one space gradually decreases while the other space gradually increases. However, the sum of each space is always constant.

The second vane 124 is accommodated in the second vane slit 126 like the first vane 121 and is elastically supported by the second elastic member 125 accommodated in the second vane slit 126 . Since the second vane 124 is pushed toward the roller 130 by the second elastic member 125 , it maintains contact with the outer peripheral surface of the roller 130 despite the eccentric rotation of the roller 130 . When the second vane 124 is additionally installed following the first vane 121 , any one of the internal spaces of the cylinder 110 partitioned by the first vane 121 is formed by the second vane 124 . It is divided into a first area (A) and a second area (B).

The size of each space represented by the first area (A) and the second area (B) changes according to the rotation of the roller 130 and is not complementary. In addition, the sum of each space represented by the first area (A) and the second area (B) changes according to the rotation of the roller (130).

The first area (A) and the second area (B) are sequentially arranged along the direction in which the roller 130 rotates. In other words, the first area (A) is located on the side opposite to the rotational direction of the roller 130 from the second vane 124 and the second area (B) is the second area (B) of the roller 130 from the second vane 124 . located on the rotational side. Accordingly, while the roller 130 sequentially passes through the first area A and the second area B, the compression of the first area A and the expansion of the second area B are sequentially performed.

When the first region (A) is compressed, the refrigerant is discharged from the first region (A). On the other hand, the compressed and discharged refrigerant is discharged to the outside of the cylinder 110 according to the control of the three-way valve 550, which will be described later, or is sucked into the second region B, which expands thereafter.

The upper bearing 150 and the lower bearing 170 are respectively installed in the upper and lower portions of the cylinder 110 as shown in FIG. 2 and include a respective sleeve and an upper shaft hole 155 formed therein. The drive shaft 330 is rotatably supported using the lower shaft hole 175 .

The upper bearing 150 and the lower bearing 170 and the cylinder 110 include a plurality of fastening holes 151 , 111 and 171 formed to correspond to each other. And by using fastening members such as bolts and nuts, the cylinder 110 and the upper and lower bearings 150 and 170 are firmly fastened to each other so that the inner space of the cylinder 110 is sealed.

The upper bearing 150 is provided with a discharge pipe 153 and a discharge valve 152 for opening and closing the discharge pipe 153 . The discharge pipe 153 is made of a flow path formed inside the upper bearing 150 so that the refrigerant can move, and is connected to the discharge unit 115 .

The discharge valve 152 selectively opens the discharge pipe 153 only when the pressure in the inner space of the cylinder 110 is greater than or equal to a predetermined pressure. To this end, the discharge valve 152 may be formed of a leaf spring having one end fixed to a portion adjacent to the discharge pipe 153 and the other end being freely deformable. However, this is only an example, and valves having various operating methods may be applied.

Meanwhile, although not shown, a retainer may be installed on the discharge valve 152 to limit the amount of deformation so that the valves operate stably. In addition, a muffler (not shown) for reducing noise generated when the compressed fluid is discharged may be installed on the upper part of the upper bearing 150 .

The valve assembly 500 is located outside the cylinder 110 , and serves to selectively communicate the first area A with any one of the second area B and the outside of the cylinder 110 . The valve assembly 500 includes a three-way valve 550, a first connecting pipe 510 that communicates the three-way valve 550 and the first region A, and a three-way valve 550 and It includes a second connection pipe 520 that communicates with the second region B and a third connection pipe 530 that communicates the outside of the cylinder 110 with the three-way valve 550 .

The first connecting pipe 510 has one end connected to the first through-portion 117 and the other end connected to the three-way valve 550 , and the second connecting pipe 520 has one end connected to the second through-port 118 . and the other end is connected to the three-way valve 550 , and the third connecting pipe 530 has one end connected to the three-way valve 550 and the other end communicated with the outside of the cylinder 110 .

This three-way valve 550 connects the first connection pipe 510 and the second connection pipe 520 to communicate the first area (A) and the second area (B), and the first area (A) The first connecting pipe 510 and the third connecting pipe 530 are connected to communicate with the outside of the cylinder 110 .

Hereinafter, the operation of the compressor 1 according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 to 6 .

3 to 6 , the roller 130 is illustrated as rotating in a counterclockwise direction, but is not limited thereto, and the roller 130 may rotate in a clockwise direction.

The discharge part 115 , the first vane 121 , the suction part 113 , the first penetration part 117 , the second vane 124 and the second penetration part 118 along the rotation direction of the roller 130 . ) are provided sequentially. 3 to 6, the above components are shown to be sequentially arranged in a counterclockwise direction, but this is a result along the rotational direction of the roller 130 . If the roller 130 rotates in a clockwise direction, the above components will be shown as being sequentially arranged in a clockwise direction, which is the rotational direction of the roller 130 .

The first vane 121 is positioned at 0 degrees with respect to the rotation center and the second vane 124 is positioned at a point rotated by 180 degrees counterclockwise from the first vane 121 . The roller 130 will be described on the assumption that it rotates counterclockwise starting from the 0 degree point. In addition, the description will be made on the assumption that the first connecting pipe 510 and the second connecting pipe 520 are provided adjacent to the second vane 124 as described above.

Meanwhile, the first area (A) and the second area (B) have been defined as respective spaces in which any one of the internal spaces partitioned by the first vane 121 is divided into two as described above. When the roller 130 is positioned at 0 degrees and 180 degrees, only the first vane 121 is in contact. In this case, the first vane 121 cannot divide the inner space into two spaces. However, since this case occurs in a very short moment, it can be ignored. Therefore, when the roller 130 is positioned at 0 degrees and 180 degrees, the space located on the left side of the second vane 124 is referred to as the first area A, and the space located on the right side of the second vane 124 is referred to as the second area. It will be referred to as region (B). On the other hand, when the roller 130 rotates counterclockwise and deviates from the positions of 0 degrees and 180 degrees, the first area A and the second area B satisfying the above definitions appear. The continuity of the first area (A) and the second area (B) satisfying these definitions is recognized with the first area (A) and the second area (B) when the roller 130 is in the 0 degree and 180 degree positions. is self-evident

Referring to FIG. 3 , as the roller 130 rotates, the first area A, which is a space located on the left side of the second vane 124 , starts to contract, and the space located on the right side of the second vane 124 . The phosphorus second region B starts to expand. Since the first region (A) is in a state in which the refrigerant is sucked in and filled, the refrigerant in the first region (A) is compressed. The valve assembly 500 closes the first connection pipe 510 so that the refrigerant is sufficiently compressed in the first region (A). At this time, the suction unit 113 is located in the first area (A) and the discharge unit 115 is located in the second area (B).

Referring to FIG. 4 , the roller 130 is rotated to a point of 90 degrees. At this time, the roller 130 is in contact with a point other than the first vane 121 among the inner circumferential surfaces of the cylinder 110, and the second vane 124 removes the right space among the two spaces partitioned by the first vane 121. It is divided into a first area (A) and a second area (B).

This first area (A) has continuity with the space referred to as the first area (A) in FIG. 3 . That is, the first area (A) is a space in which the space referred to as the first area (A) in FIG. 3 is contracted. Similarly, the second region (B) is a space in which the space referred to as the second region (B) in FIG. 3 is expanded.

As the first region (A) contracts, the refrigerant accommodated in the first region (A) is compressed. The valve assembly 500 closes the first connection pipe 510 until the refrigerant is sufficiently compressed.

As the roller 130 rotates, a new space to which the suction unit 113 is connected is generated and expanded on the left side of the first vane 121 . Accordingly, the refrigerant is sucked into the newly generated space through the suction unit 113 . At this time, the suction unit 113 is not located in the first area (A) and the discharge unit 115 is still located in the second area (B). Although the discharge part 115 is located in the second area B in FIG. 5 as well, when the roller 130 rotates, it is set again in the first area A and the second area B according to the definition to set the second area ( There are cases where it is not located in B).

Referring to FIG. 5 , the roller 130 is positioned at an almost 180 degree point, and the refrigerant accommodated in the first region A is sufficiently compressed.

At this time, the valve assembly 500 communicates with the outside of the first region A and the cylinder 110 through the three-way valve 550 if it is a low load condition, and is supplied through the three-way valve 550 if it is not a low load condition. The first area (A) and the second area (B) are connected to each other.

When the first region (A) and the outside of the cylinder 110 are communicated with each other under a low load condition, the displacement volume by the roller 130 is less than the displacement volume when the second vane 124 is not installed. 50% decrease. As the first through portion 117 is closer to the second vane 124 , the reduction in the excluded volume approaches 50%.

Here, the excluded volume is a volume that is excluded when the roller 130 rotates once in the cylinder 110 of the compressor 1 and means an effective volume in which the refrigerant is actually compressed. In a similar concept to the stroke, when a single vane is provided, it is a value obtained by subtracting the volume of the roller 130 from the volume of the compression chamber in the compressor 1, that is, the volume of the internal space.

As described above, under a low load condition, the number of rotations of the compressor 1 is generally reduced. Accordingly, there is a problem in that the efficiency of the compressor 1 is reduced and vibration is increased. However, if the reduction in the number of rotations of the compressor 1 is minimized by reducing the exclusion volume, the efficiency of the compressor 1 is reduced and the problem of increasing vibration is improved.

If the reduction of the exclusion volume is 50% under the low load condition, the motor efficiency under the low speed operation condition of the compressor (1) may increase by about 3 to 4% compared to the motor efficiency under the compressor (1) low speed operation condition. there is.

On the other hand, when the first region (A) and the second region (B) are interconnected under a non-low load condition, the exclusion volume is the same as the exclusion volume when the second vane 124 is not installed. In this case, the refrigerant moving from the first area (A) to the second area (B) is compressed by the movement of the roller 130 and then discharged through the discharge unit 115 .

In the above description, a case has been described in which the first vane 121 is provided at the 0 degree point and the second vane 124 is provided at the 180 degree point. In this way, when a 180 degree difference occurs between the points at which the first vane 121 and the second vane 124 are provided, the amount of reduction in the excluded volume reaches about 50% as described above.

This amount of reduction in the exclusion volume may be adjusted according to a difference in angle between the points at which the first vane 121 and the second vane 124 are provided.

For example, if the angle difference between the point where the first vane 121 and the second vane 124 is provided is set to 90 degrees, the refrigerant is discharged at ¼ of the total excluded volume, so the excluded volume reaches 25% of the original value. .

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the following by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

1: compressor 100: compression unit
110: cylinder 113: suction unit
115: discharge unit 121: first vane
124: second vane 130: roller
300: power generation unit 310: stator
330: drive shaft 350: rotor
500: valve assembly

Claims (14)

a cylinder providing an inner space and having a suction unit through which the refrigerant is sucked into the inner space and a discharge unit through which the suctioned refrigerant is discharged;
a roller for compressing the refrigerant while rotating eccentrically in the inner space;
a first vane provided between the suction unit and the discharge unit and in contact with the roller to partition the inner space;
a second vane provided spaced apart from the first vane and contacting the roller to divide any one of the spaces partitioned by the first vane into a first area and a second area;
a valve assembly for selectively communicating the first region with any one of the second region and the outside of the cylinder to supply the refrigerant compressed in the first region to any one of the second region and the outside of the cylinder communicating with each other; Compressor included. According to claim 1,
The roller rotates eccentrically through the first region and the second region sequentially. According to claim 1,
Compression of the first region and expansion of the second region are sequentially performed by eccentric rotation of the roller. According to claim 1,
The compressor according to claim 1, wherein the suction part is selectively disposed in the first area. 5. The method of claim 4,
The compressor, characterized in that the discharge part is selectively disposed in the second area. According to claim 1,
The suction part is provided on the side in which the roller rotates of the first vane,
The discharge unit is a compressor, characterized in that provided on the side opposite to the direction in which the roller rotates of the first vane. According to claim 1,
The first region is a compressor, characterized in that suction and discharge of the refrigerant is performed by the eccentric rotation of the roller. 8. The method of claim 7,
The second region is a compressor, characterized in that the suction of the refrigerant is selectively performed by the eccentric rotation of the roller. According to claim 1,
The valve assembly is
3-way valve;
a first connection pipe connecting the three-way valve and the first region;
a second connection pipe connecting the three-way valve and the second region; and
and a third connection pipe connecting the three-way valve and the outside of the cylinder. 10. The method of claim 9,
The cylinder may include: a first through part communicating the outside with the first area; and a second penetrating portion for communicating the second region with the outside;
The first connection pipe is connected to the first through-portion and the second connection pipe is connected to the second through-portion. 11. The method of claim 10,
The three-way valve is
The compressor, characterized in that selectively connecting the first connector to the third connector or the second connector. 11. The method of claim 10,
The first through-portion and the second through-portion are provided adjacent to the second vane. According to claim 1,
The compressor, characterized in that the discharge unit is provided adjacent to the first vane. According to claim 1,
The second vane is spaced apart from the first vane by a preset rotation angle along the rotational direction of the roller so that the volume of the space compressed by the rotation of the roller corresponds to a preset volume. .

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