KR101939217B1 - Swash plate type compressor - Google Patents

Abstract

The present invention relates to a swash plate type compressor, and is characterized in that a suction check valve is installed to prevent an excessive pressure rise of the damping chamber and to improve the performance thereof. According to such a swash plate type compressor, in adjusting the suction amount of refrigerant flowing into the suction port through the suction check valve, the opening degree of the suction check valve is adjusted not only by the differential pressure between the suction port and the suction chamber but also by the crank chamber pressure A hole communicating with the suction chamber is formed in the case of the suction check valve to guide the path of the refrigerant gas toward the damping chamber through the gap between the pressure transmitting rod and the case toward the suction chamber to prevent excessive pressure rise of the damping chamber So that the performance of the swash plate type compressor can be improved.

Description

[0001] SWASH PLATE TYPE COMPRESSOR [0002]

The present invention relates to a swash plate type compressor, and more particularly, to a swash plate type compressor which compresses a refrigerant sucked from an external refrigerant line by a plurality of reciprocating pistons in accordance with rotation of a swash plate, And the opening degree of the suction check valve mounted between the chambers can be appropriately adjusted according to the amount of refrigerant sucked from the refrigerant line.

Generally, compressors that serve to compress refrigerant in automotive cooling systems have been developed in various forms. Such a compressor includes a reciprocating type in which compression is performed while a refrigerant is compressed and a rotary type in which compression is performed while rotating. In the reciprocating type, there are a crank type in which the driving force of the drive source is transmitted to a plurality of pistons by using a crank, a swash plate type in which the swash plate is transmitted by a swash plate installed shaft, a wobble plate type in which a wobble plate is used, There are vane rotary type, scroll type using revolving scroll and fixed scroll.

Among the above various types of compressors, the swash plate type compressor is driven according to on / off of the air conditioner switch. When the compressor is driven, the temperature of the evaporator is lowered, and when the compressor is stopped, the temperature of the evaporator is raised.

On the other hand, as the swash plate type compressor, there are fixed capacity type and variable capacity type. These compressors are driven by receiving power from the rotational force of the engine of the vehicle. In the fixed capacity type, an electromagnetic clutch is provided to control the operation of the swash plate type compressor. However, in the case of the fixed capacity type having the electromagnetic clutch, there is a problem that the RPM of the vehicle flows when the compressor is driven or stopped, thereby hindering stable vehicle operation.

Therefore, in recent years, a variable displacement type, which is not provided with a clutch, is always driven with the driving of the engine of the vehicle, and can vary the discharge capacity by changing the inclination angle of the swash plate, is widely used. In such a variable displacement swash plate type compressor, a pressure control valve for adjusting the inclination angle of the swash plate is generally used for adjusting the refrigerant discharge amount.

However, in the conventional variable displacement swash plate type compressor, when the suction amount of the refrigerant is reduced, there is a problem that vibration occurs in the suction port and pulsation or roaring occurs.

In order to solve such a problem, a suction check valve 150 shown in FIG. 1 has been proposed in order to gradually change the flow area of the suction port when the suction amount of refrigerant is small to avoid abrupt suction.

The suction check valve 150 includes a case 151, an opening and closing core 153 and a recoil spring 155. The case 151 is a cylindrical body that is opened to serve as a body of the valve 150 And an opening cover 169 is fitted around the opened suction port 161. A discharge port 163 is formed at one side of the side wall surface at a right angle to the suction port 161. [

The opening and closing core 153 is a cylindrical plunger which is installed inside the case 151 so as to be movable in an axial direction and moves up and down inside the case 151 in accordance with the refrigerant pressure applied to the suction port 161, To the discharge port 163, as shown in FIG.

The recoil spring 155 is installed to elastically support the opening / closing core 153 against the pressure of the refrigerant flowing into the case 151 through the suction port 161. The refrigerant pressure The opening / closing core 153 is brought into close contact with the cover 169 so that the suction port 161 can be closed.

The axial groove 171 is formed on the outer peripheral surface of the opening and closing core 153 so that the refrigerant can flow through the axial groove 171 even when the opening and closing core 153 is in close contact with the lid 169 So that a sudden change in the opening of the suction check valve can be prevented even if there is a sudden change in the refrigerant pressure applied to the suction port 161. [

However, since the conventional suction check valve 150 is configured to operate only by the differential pressure between the suction port and the suction chamber of the variable displacement swash plate type compressor, when the differential pressure between the suction port and the suction chamber exceeds a certain limit, The opening / closing core 153 can be opened to the maximum in a state where the maximum variable operation is not performed, similarly to the case of the maximum variable operation, so that the effect of preventing pulsation or roaring of the suction pulsation and high frequency components is insignificant.

In order to solve this problem, in order to adjust the suction amount of the refrigerant flowing into the suction port through the suction check valve, the opening degree of the suction check valve is adjusted not only by the differential pressure between the suction port and the suction chamber but also by the crank chamber pressure An improved suction check valve 250 as shown in FIG. 2 has been proposed so that the occurrence of suction pulsation or roar can be prevented.

The improved suction check valve 250 is installed on the pipe 135 connecting the suction port (not shown) to the suction chamber 132 and is provided between the suction port 132 and the crank chamber 121 So that the opening degree can be controlled. At this time, a passage 136 connecting the crank chamber 121 and the conduit 135 is formed.

On the other hand, the above-described improved suction check valve 250 has a suction port 251a at one side thereof and a discharge port 251b communicating with the suction port 251a when the suction port 251a is opened, A case 251 having a guide hole 251d formed at one side thereof and a case 251 supported by the inside of the case 251 via a spring S so as to extend from the suction port 251a to the discharge port 251b An opening and closing core 252 for adjusting the flow of the refrigerant and a crank chamber 121 located inside the opening and closing core 252 so that the pressure of the crank chamber 121 can be applied to the inside of the opening and closing core 252, And a pressure transmitting rod 253 which is pressed by the pressure of the case 251 and moves up and down integrally with the opening and closing core 252 through the guide hole 251d of the case 251. [

In the case where the above-described improved suction check valve 250 is applied, when the pressure of the suction port is excessive in a state where the inlet port 251b is not maximally variable, the discharge port 251b can be adjusted to the maximum opening degree by the opening / closing core 252 The pressure of the crank chamber 121 acts on the opening / closing core 252 in a direction opposite to the pressure direction of the suction port, so that the final controlled opening degree can be reduced. As a result, Could be improved.

However, in the case of the conventional improved suction check valve 250 as described above, it was possible to considerably reduce the noise that was a problem in the variable operation, but the suction pulsation was still not reduced to a satisfactory level.

In order to solve such a problem, as shown in FIG. 3, the inside of the opening / closing core 252 'and the case 251' are provided so that the pressure of the suction chamber 132 does not act inside the opening / closing core 252 ' Another improved suction check valve 250 'has been proposed in which the damping chamber M is formed by the damping effect to improve the effect of the suction pulsation improvement.

However, when the pressure of the crank chamber 121 is transmitted to the pressure transmission rod 253 ', the gap between the pressure transmission rod 253' and the case The refrigerant gas of the crank chamber 121 flows into the damping chamber M and the pressure of the damping chamber M is excessively increased to thereby substantially close the inlet of the compressor 252 ' .

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems and it is an object of the present invention to provide an air conditioner in which the opening of the suction check valve is controlled not only by the differential pressure between the suction port and the suction chamber, A hole communicating with the suction chamber is formed in the casing of the suction check valve so that the path of the refrigerant gas directed toward the damping chamber through the gap between the pressure transmission bar and the casing is guided toward the suction chamber by the crank chamber pressure, And it is an object of the present invention to provide a swash plate type compressor capable of preventing excessive increase in pressure of a seal and thereby improving performance.

According to another aspect of the present invention, there is provided a swash plate compressor including a cylinder block having a plurality of cylinder bores formed therein, a front head disposed in front of the cylinder block and formed with a crank chamber, A rotary shaft mounted on the rotary shaft so as to be rotatable through one side of the rotary shaft; a rotary shaft integrally rotated with the rotary shaft; A swash plate installed so as to be able to vary the angle with respect to the rotation axis so that the swash plate can be adjusted; and a linear reciprocating motion, which is jointly connected to the edge of the swash plate, Thereby compressing the refrigerant sucked through the suction port, Wherein a part of the piston is provided on a passage connecting the suction port to the suction chamber, a part of the piston is provided on a passage connecting the crank chamber and the pipe, a suction port is formed on one side of the piston, An opening and closing core for controlling the flow of the refrigerant from the suction port to the discharge port, the discharge port being communicated with the discharge port, the discharge port being communicated with the discharge port, The crank chamber is pressurized by the pressure of the crank chamber so as to be located inside the opening and closing core so that the pressure of the crank chamber can be applied to the inside of the opening and closing core and moves up and down integrally with the opening and closing core through the guide hole of the case Wherein the suction check valve includes a suction check valve including a pressure transmitting rod, A damping chamber formed by the inner side of the opening and closing core and the inner surface of the case to improve the suction pulsation by a damping effect is formed at a lower portion of the case of the suction check valve, And a hole for guiding the path of the refrigerant gas toward the chamber toward the suction chamber is formed.

The holes formed in the case may have a circular shape, and a plurality of holes may be formed circumferentially along the circumference of the case.

And a groove is formed on the inside of the case so that the plurality of holes communicate with the inner surface of the case.

And the hole formed in the case is preferably formed into a long hole having a length larger than the diameter of the pressure transmission rod.

According to the swash plate type compressor as described above, in adjusting the suction amount of the refrigerant flowing into the suction port through the suction check valve, the opening degree of the suction check valve is controlled not only by the differential pressure between the suction port and the suction chamber, A hole communicating with the suction chamber is formed in the casing of the suction check valve to guide the path of the refrigerant gas toward the damping chamber through the gap between the pressure transmission bar and the casing toward the suction chamber, So that the performance of the swash plate type compressor can be improved.

1 is a perspective view showing a suction check valve employed in a conventional swash plate type compressor.
2 shows an improved suction check valve employed in a conventional swash plate compressor.
3 shows another improved suction check valve employed in a conventional swash plate compressor.
Fig. 4 is a longitudinal sectional view of a swash plate type compressor according to the present invention, showing a swash plate inclined with respect to a rotation axis; Fig.
5 is a longitudinal sectional view of a swash plate compressor according to the present invention, showing a swash plate erected in a radial direction of a rotating shaft;
6 is a longitudinal sectional view of a suction check valve applied to a swash plate type compressor according to an embodiment of the present invention, in which the suction port of the suction check valve is closed;
7 is a sectional view showing the case of the suction check valve shown in Fig.
8 is a cross-sectional view taken along line AA in Fig.
9 is a longitudinal sectional view of a suction check valve applied to a swash plate compressor according to an embodiment of the present invention, showing a state in which the suction port of the suction check valve is opened to the maximum.
10 is a vertical cross-sectional view of a suction check valve applied to a swash plate type compressor according to an embodiment of the present invention, showing a suction port of a suction check valve properly opened.
11 is a longitudinal sectional view of a suction check valve applied to a swash plate compressor according to an embodiment of the present invention, showing another embodiment of a hole formed in a case of a suction check valve.
12 is a sectional view showing the case of the suction check valve shown in Fig.
13 is a cross-sectional view taken along the line AA in Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. In the following description of the present invention, detailed description of known related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily obscured by the present invention. Also, the thickness of the lines and the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, terms used are terms defined in consideration of functions in the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be based on the entire contents of the present specification.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4 is a vertical sectional view of a swash plate type compressor according to the present invention, in which a swash plate is inclined with respect to a rotation axis, FIG. 5 is a longitudinal sectional view of the swash plate type compressor according to the present invention, 6 is a longitudinal sectional view of a suction check valve applied to the swash plate type compressor according to the embodiment of the present invention, in which the suction port of the suction check valve is closed, and FIG. 7 is a cross- FIG. 8 is a cross-sectional view taken along line AA of FIG. 7, and FIG. 9 is a longitudinal sectional view of a suction check valve applied to a swash plate compressor according to an embodiment of the present invention, 10 is a longitudinal sectional view of a suction check valve applied to a swash plate type compressor according to an embodiment of the present invention, in which suction check 11 is a vertical cross-sectional view of a suction check valve applied to a swash plate type compressor according to an embodiment of the present invention, and shows another embodiment of a hole formed in the case of the suction check valve 12 is a sectional view showing the case of the suction check valve shown in FIG. 11, and FIG. 13 is a sectional view taken along line AA of FIG.

4 to 13, a swash plate compressor according to an embodiment of the present invention includes a housing 100, a rotary shaft 200, a swash plate 300, a plurality of pistons 400, (500).

The housing 100 includes a cylinder block 110, a front head 120 and a rear head 130 as shown in FIGS. 4 and 5, which is an outer body of the swash plate compressor. Here, the cylinder block 110 is a tubular body disposed at an intermediate portion in the longitudinal direction of the housing 100, and a hollow portion is formed therein to house the plurality of pistons 400 as well as the rotary shaft 200 .

The front head 120 and the rear head 130 are cylinders for closing the open and close ends of the upper cylinder block 110. As shown in FIGS. 4 and 5, the front head 120 includes a cylinder block 110 So that the inclination adjusting mechanism 320 can be received while securing the crank chamber 121 which is the rotating space of the swash plate 300. [

The rear head 130 has a front end open toward the cylinder block 110 and includes a suction chamber 132 for supplying the refrigerant to the cylinder bore 111 of the cylinder block 110 during the suction stroke, A discharge chamber 134 through which the refrigerant in the cylinder bore 111 is discharged is formed. A suction port 131 and a discharge port (not shown), which are connected to the suction chamber 132 and the discharge chamber 134, respectively, are formed on an outer wall surface of the rear head 130. On the other hand, a suction check valve 500 is mounted on the channel 135 connecting the suction port 131 to the suction chamber 132.

4 and 5, the rotating shaft 200 is a means for transmitting the rotational driving force of the external driving source to the inside of the compressor. The rotating shaft 200 penetrates the central portion of the front head 120, And is rotatably mounted. A rotary pulley 140 is coupled to one end of a rotary shaft 200 exposed to the outside of the front head 120 and an external rotary driving force is transmitted to the rotary shaft 200 through the rotary pulley 140 The rotating shaft 200 is rotated.

4, the swash plate 300 is mounted on the rotary shaft 200 in an inclined state. The swash plate 300 is rotated by the reciprocating linear motion of the piston 400, And rotates together with the rotating shaft 200. At this time, a plurality of shoes 310 are mounted in the circumferential direction of the swash plate 300, and the plurality of pistons 400 are slidably supported by the shoe 310 through the shoe 310.

4 and 5 are variable displacement swash plate type compressors. The swash plate type compressor is installed such that the inclination angle of the swash plate 300 varies, and the swash plate 300 Is 90 DEG, the reciprocation motion of the piston 400 disappears, so that the rotation shaft 200 idles. In contrast, when the swash plate 300 is inclined with respect to the rotary shaft 200 as shown in FIG. 4, the piston 400 reciprocates in the cylinder bore 111 to compress the refrigerant.

The suction check valve 500 installed on the pipeline 135 between the suction port 130 and the suction chamber 132 through which the refrigerant flows from the outside is connected to the suction check valve 500 when the slope of the swash plate 300 approaches 90 °, The amount of inflow of the refrigerant becomes small, and on the contrary, when the inclination becomes smaller than 90 degrees, the inflow amount of the refrigerant increases, thereby increasing the opening degree.

The plurality of pistons 400 are means for compressing the refrigerant while reciprocating in the cylinder bore 111 by the swash plate 300. As shown in FIGS. 4 and 5, And is reciprocated linearly along the inner peripheral surface of the cylinder bore 111 of the cylinder block 110 by the rotation of the swash plate 300, The refrigerant sucked into the cylinder bore 111 through the discharge port 131 is discharged to an external refrigerant line through a discharge port (not shown) of the rear head 130.

The suction check valve 500 whose opening degree is adjusted according to the amount of the refrigerant flowing through the suction port 131 in the swash plate type compressor according to the present invention is mainly composed of the suction port 131 of the rear head 130, The pressure in the crank chamber 121 of the front head 120 is added to the pressure in the suction chamber 132 to control the opening degree of the suction port 131 and the suction chamber 132 132 and the crank chamber 121. In this way, The crank chamber 121 and the channel 135 are connected to each other through the passage 136 for precise opening adjustment.

The suction check valve 500 is partly provided on a pipeline 135 connecting the suction port 131 to the suction chamber 132 and includes a passage for connecting the crank chamber 121 and the pipeline 135 And includes a case 510, an opening and closing core 520, and a pressure transmitting rod 530, as shown in FIGS. 6 to 11.

The case 510 is formed as a hollow cylinder such as a cylindrical body and has a suction port 511 formed at one side thereof and a suction port 511 and a suction port 511 formed at the other side thereof. And a guide hole 514 is formed on the other side.

The lower end of the case 510 is formed in a closed shape except for a guide hole 514 through which the pressure transmitting rod 530 can pass, And a lid 513 is placed on the upper end of the lid 513. A suction port 511 is formed at the center of the lid 513 to continuously form a flow path with the suction port 131. [ Therefore, when the suction port 511 is opened, the external refrigerant flowing into the suction port 131 enters the inside of the case 510 through the suction port 511.

 The damping chamber M formed by the inside of the opening / closing core 520 and the inner surface of the case 510 to improve suction pulsation by a damping effect is disposed inside the case 510 of the suction check valve 500 And a path of the refrigerant gas directed toward the damping chamber M is formed at a lower side of the case 510 of the suction check valve 500 through a gap between the pressure transmitting rod 530 and the case 510 And a hole 510a for guiding in the direction of the suction chamber 132 is formed.

The holes 510a formed in the case 510 may have a circular shape as shown in FIGS. 6 to 10, and may be formed in a circumferential direction along the circumference of the case 510.

When the hole 510a is formed in a circular shape, the plurality of holes 510a can communicate with the inner surface of the case 510, so that the pressure in the inner space E of the case 510 It is necessary to allow the refrigerant gas to be smoothly discharged from the multiple directions into the suction chamber 132 in a state where the delivery rods 320 are inserted. To this end, a groove 510b is formed on the inner surface of the case 510 so that the holes 510a of the plurality of gangs can communicate with each other.

11 to 13, the hole 510a formed in the case 510 may have a long hole having a length larger than the diameter of the pressure transmission bar 530. [ The reason why the hole 510a is formed into a long hole having a length larger than the diameter of the pressure transmitting rod 530 is the same as that of forming the groove 519b in the embodiment shown in Figs. 6 to 10 . That is, in a state where the pressure transmitting rod 320 is inserted into the inner space E of the case 510, the refrigerant gas freely moves into the space of the hole 510a formed in the long hole and smoothly flows into the suction chamber 132 So that it can be done.

The opening and closing core 520 is a means for interrupting the flow of the refrigerant passing through the inside of the case 510 so as to control the flow of the refrigerant from the inlet 511 of the case 510 to the outlet 512 The pressure of the refrigerant flowing through the suction port 511 of the case 510 (also the pressure of the suction port 131) and the pressure of the suction chamber 132 (or the pressure of the suction chamber 132 and the pressure of the crank chamber 121) The opening degree of the inlet port 511 and the outlet port 512 of the case 510 is adjusted. In addition, an axial groove (not shown) is formed on the outer circumferential surface of the opening / closing core 520 so that the refrigerant flows through the axial groove 521 even when the opening / closing core 520 is in close contact with the lid 513. It is possible to prevent a sudden change of opening degree of the opening / closing core 520 due to a sudden change in the refrigerant pressure applied to the inlet 511.

On the other hand, the opening / closing core 520 is vertically reciprocated within the case 510 And is supported by a spring S inserted into the inside of the case 510 as shown in Figs. 7 to 9, and the cover 510 of the case 510 513 and the bottom dead center at which the compression of the spring S is no longer possible. The opening / closing core 520 may be formed to be spaced apart from the inner circumferential surface of the case 510 by a predetermined distance because the opening / closing core 520 reciprocates vertically inside the case 510. However, It is more preferable that the protrusion 510 is formed to have a size that is in close contact with the inner circumferential surface of the protrusion 510 and can slide in the axial direction along the inner circumferential surface.

The spring S is an elastic resilience means for supporting the opening and closing core 520 as described above. The spring S is installed between the opening and closing core 520 and a floor formed at a certain point in the inner space of the case 510, 520 and serves to repel the opening / closing core 520 against the pressure of the refrigerant flowing through the inlet 511. 6, the opening / closing core 520 is pushed up to the maximum extent so as to be brought into close contact with the lid 513, while the inlet port 511 is closed by the suction port 511. In other words, when there is no pressure of the refrigerant acting through the inlet port 511, When the pressure of the refrigerant acting through the discharge port 512 is the maximum, the discharge port 512 is maximally compressed toward the bottom of the case 510 as shown in FIG.

The pressure transmitting rod 530 is a means for enabling the pressure of the crank chamber 121 to additionally act on the opening and closing core 520. The pressure transmitting rod 530 is a member for pressing the pressure of the suction port 131 applied to the opening / The pressure of the crank chamber 121 can be added to the pressure of the suction chamber 132 so that the pressure of the suction port 132 can be increased so that the pressure of the suction port 131 becomes excessive. The opening degree of which can be adjusted appropriately.

The pressure transmitting rod 530 is formed with a pressing surface at its end portion to receive the pressure of the crank chamber 121 so that the pressure of the crank chamber 121 can be applied to the inside of the opening and closing core 520, It is preferable that it is formed in a shaft shape which is located inside the opening and closing core 520 and penetrates the guide hole 514 of the case 510 and moves up and down integrally with the opening and closing core 520. For example, It can be formed as a solid seal.

The pressure transmitting rod 530 is reciprocally moved up and down inside the case 510 so that the pressure transmitting rod 530 may be formed to be spaced apart from the inner circumferential surface of the guide hole 514 of the case 510 by a predetermined distance. It is more preferable that it is formed to have a size that is in close contact with the inner circumferential surface of the guide hole 514 of the case 510 and can slide in the axial direction along the inner circumferential surface to suppress noise and vibration.

Hereinafter, the operation of the swash plate compressor according to the embodiment of the present invention will be described with reference to the accompanying drawings.

The swash plate compressor according to the embodiment of the present invention is configured to vary the opening degree of the suction check valve 500 according to the flow rate of the refrigerant flowing from the external refrigerant line through the suction port 131, 5, the function of the suction check valve 500 becomes more important in the case of the variable displacement swash plate type compressor in which the inclination of the swash plate 300 can be varied.

4, when the inclination of the swash plate 300 is the maximum, the stroke of each piston 400 becomes the maximum, so that the amount of the refrigerant flowing from the outside through the suction port 131 becomes maximum do. Accordingly, the opening / closing core 520, which has closed the suction port 511 of the suction check valve 500, reaches the bottom dead center as shown in FIG. 8 while compressing the spring S to the maximum. When the opening / closing core 520 reaches the bottom dead point, the suction port 511 of the suction check valve 500 as well as the discharge port 512 are adjusted to the maximum opening degree so that the refrigerant at the maximum flow rate is delivered to the suction chamber 132 do.

Conversely, when the inclination of the swash plate 300 is 90 deg. As shown in Fig. 5, the reciprocation of each piston 400 disappears and the stationary state in the cylinder bore 111 is maintained. At this time, the amount of the refrigerant flowing through the suction port 131 is minimized. In this case, as shown in FIG. 7, the opening / closing core 520 closes the suction port 511 by the reaction force of the spring S.

In the variable operation of the swash plate type compressor, the slope of the swash plate 300 varies, so that the refrigerant pressure acting on the opening / closing core 520 through the suction port 511 varies, but the suction port 511 and the suction chamber The opening / closing core 520 can be fully lowered to the position shown in FIG. 8 even when the differential pressure between the open / close cores 520 is not the maximum variable. 9, the pressure of the refrigerant from the crank chamber 121 rises the pressure transmission rod 530 and the opening / closing core 520, so that the opening of the discharge port 512 can be appropriately adjusted do.

That is, even when the pressure of the suction port 131 is excessively high and the discharge port 512 can be adjusted to the maximum opening degree by the opening / closing core 520 in a state where the suction port 131 is not the maximum variable, As the pressure transmitting rod 530 raises the opening / closing core 520, the final adjusted opening degree as shown in FIG. 10 can be reduced. As a result, the conventional problems such as the suction pulsation and the noise can be prevented , The pulsation of the high frequency component can also be effectively reduced.

In addition, the damping effect of the damping chamber M formed by the inside of the opening / closing core 252 'and the case 251' can improve the suction pulsation generated in the variable operation.

By forming a hole 510a communicating with the suction chamber 132 at one lower side of the case 510, the refrigerant flowing toward the damping chamber M through the gap between the pressure transmitting rod 530 and the case 510 The path of the gas can be guided in the direction of the suction chamber 132, so that an excessive pressure rise of the damping chamber M can be prevented, and the performance of the swash plate type compressor can be improved.

According to the above-described embodiment of the present invention, in adjusting the suction amount of the refrigerant flowing into the suction port through the suction check valve, the opening degree of the suction check valve is controlled not only by the differential pressure between the suction port and the suction chamber, A hole communicating with the suction chamber is formed in the casing of the suction check valve to guide the path of the refrigerant gas toward the damping chamber through the gap between the pressure transmission bar and the casing toward the suction chamber, So that the performance of the swash plate type compressor can be improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It is to be understood that the invention may be variously modified and changed.

100: housing 110: cylinder block
120: front head 121: crank chamber
130: rear head 131: suction port
132: suction chamber 135: channel
136: passage 200: rotating shaft
300: swash plate 400: piston
500: Suction check valve 510: Case
510a: hole 510b: groove
M: damping chamber 511: inlet
512: discharge port 513: cover
514: guide hole 520: opening / closing core
530: pressure transmitting rod

Claims (4)

A cylinder block 110 having a plurality of cylinder bores 111 formed therein and a front head 120 disposed in front of the cylinder block 110 and formed with a crank chamber 121, And a rear head (130) having a port (131), a suction chamber (132), a discharge port and a discharge chamber (134) formed therein to form an outer body;
A rotating shaft 200 rotatably mounted through one side of the housing 100;
A swash plate 300 mounted on the rotary shaft 200 and integrally rotated with the rotary shaft 200 so as to be able to vary the angle with respect to the rotary shaft 200 so that the refrigerant discharge amount can be adjusted;
And is linearly reciprocated along the inner circumferential surface of the cylinder bore 111 by the rotation of the swash plate 300 so as to be reciprocated relative to the edge of the swash plate 300, A plurality of pistons (400) for compressing the refrigerant and discharging the compressed refrigerant to the discharge chamber (134); And
A part of which is provided on a channel 135 connecting the suction port 131 to the suction chamber 132 and a part of which is installed on a passage 136 connecting the crank chamber 121 and the channel 135 A case 510 having a suction port 511 formed on one side thereof and a discharge port 512 communicating with the suction port 511 formed on the other side thereof and a guide hole 514 formed on the other side thereof; An opening and closing core 520 which is supported on the inner side of the case 510 via a spring S to control the flow of refrigerant from the inlet 511 to the outlet 512, And is pressurized by the pressure of the crank chamber 121 so that the guide hole 514 of the case 510 is pressurized by the pressure of the crank chamber 121. [ And a pressure-transmitting rod 530 which penetrates and vertically moves together with the opening / closing core 520. The suction check valve 5 00);
And a damping chamber M formed by the inner side of the opening / closing core 520 and the inner surface of the case 510 to improve suction pulsation by a damping effect is disposed inside the case 510 of the suction check valve 500 The suction check valve 500 is formed at a lower side of the case 510 with a refrigerant gas flowing toward the damping chamber M through a gap between the pressure transmission rod 530 and the case 510. [ A hole 510a for guiding the path in the direction of the suction chamber 132 is formed,
A plurality of holes 510a are formed circumferentially along the circumference of the case 510,
And a groove 510b is formed inside the case 510 to allow the plurality of holes 510a to communicate with the inner surface of the case 510. [ The method according to claim 1,
Wherein a hole (510a) formed in the case (510) is formed in a circular shape. delete The method according to claim 1,
Wherein the hole (510a) formed in the case (510) is in the shape of a long hole having a length larger than the diameter of the pressure transmission rod (530).

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