KR101936099B1 - Swash plate type compressor - Google Patents

Abstract

The present invention relates to a swash plate compressor, and more particularly, to a swash plate type compressor having a suction check valve capable of solving the problem of excessive opening and closing of the opening / closing core due to a pressure transmitting rod, which may occur when the pressure in the crank chamber becomes abnormally high, . 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 The pressure transmitting rod for transmitting the pressure of the crank chamber and the opening and closing core for adjusting the opening degree of the suction check valve are independently constructed so that the pressure transmitting rod and the opening and closing core can be moved integrally , The occurrence of the hunting phenomenon can be prevented.

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, when the pressure of the crank chamber 121 becomes abnormally high, the suction port 251a due to the action of the pressure transmission rod 253 and the opening / closing core 252 This state is a state in which the pressure in the suction chamber 132 rises, the pressure control valve is closed, the suction port 251a is opened by the pressure drop of the crank chamber 121, the suction chamber 132 is opened, And the pressure regulating valve is opened. As a result, the performance of the compressor may be deteriorated due to the so-called hunting phenomenon.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a crankcase which is capable of independently moving a pressure transmission rod for transmitting pressure in a crankcase and an opening / The present invention provides a swash plate type compressor capable of solving the problem of excessive opening and closing of the opening and closing cores due to the pressure transmitting rod which may occur when the pressure of the crank chamber becomes abnormally high, .

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, A case having a discharge hole communicating with the suction port and having a guide hole formed on the other side thereof and a spring supported on the inside of the case to control the flow of the refrigerant from the suction port to the discharge port, Wherein the crank chamber is pressurized by the pressure of the crank chamber and penetrates through the guide hole of the case and the through hole of the opening and closing core and the pressure of the crank chamber is selectively applied according to the position of the opening and closing core And a suction check valve including a pressure-transmitting rod provided with a pressure means for allowing the pressure- .

Preferably, the pressure transmission rod further includes an upward movement restricting means for restricting the upward movement of the pressure transmission rod to a predetermined section.

Preferably, the upward movement restricting means is formed separately from the pressure transmission bar and is installed in the pressure transmission bar.

And a downward movement restricting means for restricting a downward movement of the pressure transmitting rod to a predetermined section is formed on the inside of the case by engaging a pressing means provided on the pressure transmitting rod.

It is preferable that the pressure transmitting bar is formed by being separated from the first constituent portion including the pressing means and the second constituent portion including the movement restricting means and being coupled to each other.

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, And a rear head formed with a suction chamber, a discharge port, and a discharge chamber, and configured to form an outer body; a rotary shaft mounted to be rotatable through one side of the housing; A swash plate installed to vary an angle with respect to the rotating shaft so that a refrigerant discharge amount can be controlled; and a swash plate coupled to an edge portion of the swash plate so as to be relatively movable with respect to an inner peripheral surface of the cylinder bore, By performing the movement, the refrigerant sucked through the suction port is compressed, A plurality of pistons to be discharged to the discharge chamber, and a part of the piston is provided on a pipe connecting the suction port to the suction chamber, a part of which is provided on a passage connecting the crank chamber and the pipe, A case having a guide hole formed at one side thereof and a spring connected to the inside of the case to control the flow of the refrigerant from the suction port to the discharge port, Wherein the crank chamber is pressed by the pressure of the crank chamber and passes through the guide hole of the case and moves along the guide groove of the opening and closing core, And a pressure transmitting rod provided with a pressing means for selectively applying the pressure to the suction check valve It characterized in that it comprises.

Preferably, the pressure transmitting rod is formed with a damping preventing groove for preventing a damping phenomenon occurring when the pressure transmitting rod moves along the guide groove of the opening / closing core.

Preferably, the pressure transmission rod further includes an upward movement restricting means for restricting the upward movement of the pressure transmission rod to a predetermined section.

Preferably, the upward movement restricting means is formed separately from the pressure transmission bar and is installed in the pressure transmission bar.

And a downward movement restricting means for restricting a downward movement of the pressure transmitting rod to a predetermined section is formed on the inside of the case by engaging a pressing means provided on the pressure transmitting rod.

According to the swash plate type compressor as described above, the pressure transmitting rod for transmitting the pressure in the crank chamber and the opening / closing core for adjusting the opening degree of the suction check valve are separately arranged so that they can move independently. The problem of excessive opening and closing of the opening / closing core due to the pressure transmitting rod which may be caused when the pressure of the crank chamber becomes abnormally high, and the problem of hunting phenomenon caused thereby can be solved.

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 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.
4 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;
5 is a longitudinal sectional view showing a first embodiment 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;
6 is a longitudinal sectional view showing a first embodiment of a suction check valve applied to a swash plate type 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.
7 is a longitudinal sectional view showing a first embodiment 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 opened properly.
FIG. 8 is a longitudinal sectional view showing a first embodiment of a suction check valve applied to a swash plate type compressor according to an embodiment of the present invention, in which the upward movement restricting means is configured in another form;
9 is a longitudinal sectional view showing a first embodiment of a suction check valve applied to a swash plate type compressor according to an embodiment of the present invention, in which the pressure transmission rod is configured as a separate type.
10 is a longitudinal sectional view showing a second embodiment of the 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.
11 is a longitudinal sectional view showing a second embodiment of the 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 opened to the maximum.
12 is a longitudinal sectional view showing a second embodiment 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 properly opened.

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. 3 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. 4 is a longitudinal sectional view of the swash plate type compressor according to the present invention, 5 is a vertical sectional view showing a first embodiment 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, FIG. 6 is a longitudinal sectional view showing a first embodiment 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 opened to the maximum, FIG. 1 is a longitudinal sectional view showing a first embodiment of a suction check valve applied to a swash plate type compressor according to an embodiment, in which the suction port of the suction check valve is properly opened, 8 is a longitudinal sectional view showing a first embodiment of a suction check valve applied to a swash plate type compressor according to an embodiment of the present invention, FIG. 10 is a longitudinal sectional view showing a first embodiment of a suction check valve applied to a swash plate type compressor according to an embodiment of the present invention, and FIG. 10 is a perspective view of a swash plate type compressor according to an embodiment of the present invention. 11 is a longitudinal sectional view showing a suction check valve applied to a compressor according to an embodiment of the present invention, and FIG. 11 is a sectional view showing a suction check valve applied to a swash plate compressor according to an embodiment of the present invention. Fig. 12 is a longitudinal sectional view showing a second embodiment of the suction check valve according to the embodiment of the present invention, Groups as a longitudinal cross-sectional view showing a second embodiment of the inlet check valve is also applied, a view showing the suction port of the suction check valve suitably opened state.

3 to 9, 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).

3 and 4, the housing 100 includes a cylinder block 110, a front head 120, and a rear head 130. As shown in FIGS. 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. 3 and 4, 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.

3 and 4, 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 a 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.

3, the swash plate 300 is mounted on the rotary shaft 200 in an inclined state. The swash plate 300 is a member for converting the rotational driving force of the rotary shaft 200 into 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.

In particular, the swash plate type compressor shown in FIGS. 3 and 4 is a variable displacement swash plate type compressor. The swash plate type compressor is installed such that the inclination angle of the swash plate 300 is variable, Is 90 DEG, the reciprocation motion of the piston 400 disappears, so that the rotation shaft 200 idles. Conversely, when the swash plate 300 is inclined with respect to the rotary shaft 200 as shown in FIG. 3, 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. 3 and 4, 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.

In the first embodiment of the suction check valve applied to the swash plate type compressor according to the embodiment of the present invention, the suction check valve 500 includes a pipe 135 connecting the suction port 131 to the suction chamber 132 A part of the crankcase 121 is installed on the crankcase 121 and a part of the crankcase 121 is connected to the channel 136 connecting the crankcase 121 and the channel 135. As shown in Figures 5 to 9, An opening / closing core 520, and a pressure transmitting rod 530.

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 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 a hollow cylinder having a lower side opened. A through hole 512a through which the pressure transmitting bar 530 can pass is formed at the center of the opening / closing core 520. 5 to 7, the opening / closing core 520 is supported by a spring S inserted into the inside of the case 510 and is engaged with the lid 513 of the case 510 Reciprocating between the top dead center and the bottom dead center where 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. 5, the opening / closing core 520 is pushed up to the uppermost position so as to be brought into close contact with the lid 513, while the suction port 511 is closed by the suction port 511. In other words, when there is no pressure of the refrigerant acting through the suction 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 for transmitting the pressure of the crank chamber 121 is separated and configured to move independently of the opening / closing core 520 that controls the opening degree of the suction check valve, unlike the conventional art described above And may move integrally with the opening / closing core 520 in a certain period. This is due to the problem of excessive opening and closing of the opening / closing core 520 due to the pressure transmitting rod 530 which may occur when the pressure of the crank chamber 121 becomes abnormally high in the prior art, .

The pressure transmitting rod 530 is pressurized by the pressure of the crank chamber 121 and a pressing surface for receiving the pressure of the crank chamber 121 is formed at an end of the pressure transmitting rod 530, 514 and the through-hole 521 of the opening / closing core 520. As shown in FIG. The pressure of the crank chamber 121 may be selectively controlled by the opening and closing core 520 only when the opening and closing core 520 is in a predetermined position. And a pressing means 531 for transmitting the pressing force. 5 to 7, the pressing means 531 may be formed in a protruding shape to surround the outer circumference of the pressure transmitting bar 530. Here, the pressure transmitting rod 530 is preferably formed in a shaft shape, and may be formed as a solid rod such as a circular rod.

Meanwhile, the pressure transmission rod 530 may further include an upward movement restricting means 532 for limiting the upward movement of the pressure transmission rod 530 to a predetermined section.

The upward movement restricting means 532 may be formed at a lower end of the pressure transmission rod 530 and may have a protrusion shape surrounding the outer circumference of the pressure transmission rod 530. 8, the upward movement restricting means 532 may be integrally formed with the pressure transmission rod 530. However, as shown in FIGS. 5 to 7, the pressure transmission rod 530 may be integrally formed with the pressure transmission rod 530, And may be installed in the pressure transmission rod 530. [

On the other hand, downward movement restricting means (not shown) for restricting the downward movement of the pressure transmission rod 530 to a predetermined section by engaging a pressing means 531 provided on the pressure transmission rod 530, 510a may be further formed. The downward movement restricting means 510a regulates the pressure transmitting rod 530 so as not to descend when the pressure of the crank chamber 121 is low.

9, the pressure transmitting rod 530 includes a first component 530a including the pressing unit 531 and a second component including the movement restricting unit 532 530b, and may be coupled to each other.

10 to 12, in the second embodiment of the suction check valve applied to the swash plate type compressor according to the embodiment of the present invention, the suction check valve 500 includes a suction port 131, A part of which is provided on a channel 135 connecting the crankcase 121 to the crankcase 132 and a part of which is provided on the passage 136 connecting the crankcase 121 and the channel 135, As described above, the suction check valve includes the case 510, the opening / closing core 520, and the pressure transmitting rod 530 in the same manner as the first embodiment of the suction check valve described above. The description is omitted.

In the case of the second embodiment of the suction check valve applied to the swash plate compressor according to the embodiment of the present invention, as shown in FIGS. 10 to 12, the opening / closing core 520 is not formed in a through- And the pressure transmitting rod 530 is moved along the guide groove 522. The pressure transmitting rod 530 is formed in a shape having a through hole 522 formed therein.

As described above, when the opening / closing core 520 is formed in a non-penetrating shape unlike the first embodiment of the above-described suction check valve, a pressure leak in the penetrated portion can be reduced.

Further, in the case of the second embodiment of the suction check valve applied to the swash plate compressor according to the embodiment of the present invention, since the opening / closing core 520 is formed in a closed shape, The damping phenomenon may occur and the movement of the pressure transmitting rod 530 may be restricted.

Therefore, as shown in FIGS. 10 to 12, in order to prevent the damping phenomenon occurring when the pressure transmitting rod 530 moves along the guide groove 522 of the opening / closing core 520, It is preferable to form the damping preventing groove 533 in the groove 530.

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 type 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, 4, the role 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.

3, when the inclination of the swash plate 300 is the maximum, the stroke of each piston 400 becomes the maximum, and therefore 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. 6 or 11 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 becomes 90 deg. As shown in Fig. 4, the reciprocation of each piston 400 disappears and the piston bores 111 remain stationary. At this time, the amount of the refrigerant flowing through the suction port 131 is minimized. In this case, as shown in FIG. 5 or 10, the opening / closing core 520 moves the suction port 511 Closing.

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. 6 or FIG. 11 even when the differential pressure is not the maximum variable. 7 or 12, the pressure of the refrigerant from the crank chamber 121 rises the pressure transmitting rod 530 and the opening / closing core 520 so that the opening degree of the discharge port 512 is appropriately adjusted .

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, Accordingly, the final adjusted opening degree can be reduced as shown in FIG. 7 or 12 by raising the opening / closing core 520 by the pressure transmitting rod 530, thereby preventing the generation of suction pulsations and / And the pulsation of the high frequency component can also be effectively reduced.

7 or 12, even when the pressure of the crank chamber 121 suddenly increases abnormally, the upward movement restricting means 532 provided in the pressure transmitting rod 530 is not moved to the case 510 And the upward movement of the opening and closing core 520 by the pressure transmitting rod 530 is restricted so that the problem of excessive opening and closing of the opening and closing core 520 can be solved, Can be solved.

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, The pressure transmitting rods for transmitting the pressure of the crank chamber and the opening and closing cores for adjusting the opening degree of the suction check valves are independently separated from each other so that the upward movement of the pressure transmitting rods is limited to a predetermined range, It is possible to solve the problem of excessive opening and closing of the opening and closing core due to the pressure transmitting rod which may occur when the pressure of the crank chamber becomes abnormally high, and the problem of hunting phenomenon caused thereby.

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
511: Inlet port 512: Outlet port
513: cover 514: guide hole
520: opening / closing core 522: guide groove
530: pressure transmitting rod 533: damping preventing groove
531: Pressurizing means 532:

Claims (10)

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; And an opening / closing core (520) having a through hole (521) formed at the center thereof, which is supported by the spring (S) inside the case (510) and controls the flow of refrigerant from the inlet And is inserted through the guide hole 514 of the case 510 and the through hole 521 of the opening and closing core 520 by the pressure of the crank chamber 121, 121) are selectively applied depending on the position of the opening / closing core (520) A suction check valve 500 including a month rod 530;
Wherein the compressor is a compressor. The method according to claim 1,
Wherein the pressure transfer rod (530) is further provided with upward movement restricting means (532) for restricting the upward movement of the pressure transmission rod (530) to a predetermined section. The method of claim 2,
Wherein the upward movement restricting means (532) is formed separately from the pressure transmission rod (530) and installed in the pressure transmission rod (530). The method according to any one of claims 1 to 3,
A lowering movement restricting means 510a for restricting the downward movement of the pressure transmitting bar 530 to a predetermined section by engaging a pressurizing means 531 provided on the pressure transmitting bar 530, Is formed on the outer circumferential surface of the swash plate compressor. The method of claim 2,
The pressure transmitting rod 530 is divided into a first component portion 530a including the pressing means 531 and a second component portion 530b including the movement restricting means 532, Wherein the first and second compression members are formed in the first and second compression chambers. 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; And an opening / closing core 520 having a guide groove 522 formed at the center thereof for controlling the flow of refrigerant from the inlet port 511 to the outlet port 512 through the spring S, And is pressed by the pressure of the crank chamber 121 and passes through the guide hole 514 of the case 510 and moves along the guide groove 522 of the opening / closing core 520, A pressure means for selectively applying the pressure of the crank chamber 121 in accordance with the position of the opening / closing core 520 A suction check valve (500) including a pressure transmission rod (530) provided with a suction port (531);
Wherein the compressor is a compressor. The method of claim 6,
A damping preventing groove 533 is formed in the pressure transmitting rod 530 to prevent a damping phenomenon occurring when the pressure transmitting rod 530 moves along the guide groove 522 of the opening / closing core 520 Characterized by a swash plate compressor. The method of claim 7,
Wherein the pressure transfer rod (530) is further provided with upward movement restricting means (532) for restricting the upward movement of the pressure transmission rod (530) to a predetermined section. The method of claim 8,
Wherein the upward movement restricting means (532) is formed separately from the pressure transmission rod (530) and installed in the pressure transmission rod (530). The method according to any one of claims 6 to 9,
A lowering movement restricting means 510a for restricting the downward movement of the pressure transmitting bar 530 to a predetermined section by engaging a pressurizing means 531 provided on the pressure transmitting bar 530, Is formed on the outer circumferential surface of the swash plate compressor.

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