KR20140014852A - Swash plate type compressor - Google Patents

Abstract

The present invention relates to a swash plate type compressor having a suction check valve (500), which is capable of effectively reducing the pulsation of a high-frequency component generated when an opening/closing core (520) controlling the flow of a refrigerant is actuated, and is capable of preventing vibration noise. According to the present invention, the opening degree of the suction check valve (500) gradually increases, and then decreases while the opening/closing core (520) of the suction check valve (500) drops so that the pulsation of the high-frequency component can be effectively reduced; and a fixing structure applied to mounting surfaces (521aa, 516) on which a spring (S) touches the opening/closing core (520) or a case (510) allows the opening/closing core (520) to adhere to the inner surface of the case (510) when the opening/closing core (520) is actuated so that the generation of the vibration noise can be prevented when the opening/closing core is actuated, wherein the fixing structure regulates the position of the end portion of the spring (S).

Description

Swash Plate Compressor {SWASH PLATE TYPE COMPRESSOR}

The present invention relates to a swash plate compressor, and more particularly, in adjusting the opening degree of the refrigerant pipe flowing from the refrigerant line into the compressor through the suction check valve, the opening degree can be properly adjusted during the variable operation of the compressor, and the pulsation of the high frequency component can be achieved. The present invention relates to a swash plate compressor that can effectively reduce the noise and prevent the occurrence of vibration noise during operation of the open / close core.

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 various types of compressors described above, the swash plate type compressor is driven according to the 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 increased.

On the other hand, the swash plate type compressor includes a fixed displacement type and a variable displacement type. These compressors are driven by receiving power from the rotational force of the engine of the vehicle. The fixed displacement type electronic clutch is provided to control the driving of the swash plate type compressor. However, in the case of the fixed-capacity type provided with the electronic clutch, there is a problem in that the RPM of the vehicle flows when the compressor is driven or stopped, thereby preventing stable vehicle operation.

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

However, in the case of the conventional variable displacement swash plate type compressor as described above, when the refrigerant suction amount decreases, vibration occurs in the suction port, thereby causing a pulsation or roar.

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, Even when the maximum variable operation is not performed, the opening / closing core 153 can be opened to a maximum similar to the case of the maximum variable operation, so that the effect of preventing the occurrence of suction pulsation or noise 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 improved suction check valve 250 as described above, the inlet port 251a penetrates on one side, and when the inlet port 251a is opened, the outlet port 251b communicating with the inlet port 251a penetrates to the other side. And a case 251 having a guide hole 251 d formed at another side thereof, and being supported by a spring S inside the case 251, leading from the suction port 251 a to the discharge port 251 b. Opening and closing core 252 for controlling the flow of the refrigerant, and the crank chamber 121 is 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. It includes a pressure receiving chamber 253 that accommodates the pressure of, 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 adjusted opening degree can be reduced. As a result, .

However, in the case of the conventional improved suction check valve 250 as described above, although the suction pulsation or the noise that was a problem during variable operation could be considerably reduced, there was a problem that the suction pulsation of the high frequency component was still not reduced. In addition, due to a gap between the side of the opening and closing core 252 and the inner surface of the case 251, there was a problem that vibration noise occurs during the operation of the opening and closing core 252.

The present invention has been proposed to solve the above problems, by increasing the valve opening degree gradually decreases again as the opening and closing core of the suction check valve descends from the inlet port, it is possible to effectively reduce the pulsation of high-frequency components, spring By applying a fixing structure that regulates the end position of the spring to the spring seating surface in contact with the opening core or the case so that the opening core is in close contact with the inner surface of the case, the occurrence of vibration noise during the operation of the opening and closing core can be prevented. An object of the present invention is to provide a swash plate type compressor.

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, A case having a plurality of pistons for discharging, a pipe connecting the suction port to the suction chamber, a suction port penetrating on one side, and a discharge port communicating with the suction port on the other side; and a spring inside the case. And an intake check valve configured to be supported by a medium to control the flow of the refrigerant from the inlet to the outlet, and having a structure in which the valve opening is gradually increased and then decreased again as the opening and closing core is lowered. It is characterized by.

The discharge port is formed at a position spaced apart from the suction port in a downward direction by a predetermined distance, and the upper end of the opening and closing core is formed to have a length equal to the distance between the suction port and the discharge port, to determine the valve opening degree with the discharge port on one side It is preferable that an auxiliary opening and closing core having an auxiliary discharge port is provided.

Preferably, the auxiliary discharge port has an upper end formed at a position spaced apart from the upper end of the auxiliary opening and closing core by a predetermined distance.

It is preferable that a pressure control hole communicating with the inside of the case and the suction chamber is formed at the lower side of the other side of the case so that the pressure of the suction chamber can act on the inside of the opening / closing core.

A passage connecting the crank chamber and the conduit is further formed so that the opening degree of the suction check valve can be adjusted by the differential pressure between the suction port, the suction chamber and the crank chamber, and on another side of the case of the suction check valve A guide hole is formed, and the suction check valve is positioned inside the opening / closing core so that the pressure of the crank chamber can be applied to the inside of the opening / closing core to receive the pressure of the crank chamber, and penetrates the guide hole of the case. It is preferable to further include a pressure receiving chamber to move up and down integrally with the opening and closing core.

The case is formed of a hollow cylinder through which the suction port and the discharge port respectively penetrate the one end surface in the axial direction and one side in the transverse direction, and the guide hole penetrates the other end surface in the axial direction. It is preferable that it is formed of the hollow cylinder which moves up and down in the direction, and the lower side opened, and the said pressure accommodating chamber is formed by the hollow cylinder which moves up and down along the said guide hole.

A spring seating surface is formed on the case and the opening and closing core, respectively, and a spring seating fixing jaw is formed on the spring seating surface formed in the opening and closing core to guide one end of the spring to be biased toward the center of the spring seating surface. It is desirable to be.

The spring seating surface formed on the case is preferably formed with a spring bottom position fixing projection for inducing the lower end of the spring to be seated in the central portion of the spring seating surface.

The spring bottom position fixing protrusion is preferably formed with an inclined surface to guide the lower end of the spring to be seated smoothly on the spring seating surface formed in the case.

A connecting rod having a predetermined length in the axial direction is connected to the upper end of the opening and closing core, and an end portion of the connecting rod is provided with an inlet portion closing block for gradually reducing the open cross-sectional area of the inlet after the opening and closing core is lowered by a predetermined length. It is preferable.

Preferably, the inlet port closing block is formed such that its cross-sectional area is gradually increased until it is separated by a predetermined distance from the upper end of the connecting rod.

The inlet portion closing block is preferably formed so that the cross-sectional area is gradually smaller from the position away from the upper end of the connecting rod by a predetermined distance from the upper end of the connecting rod.

A passage connecting the crank chamber and the conduit is further formed so that the opening degree of the suction check valve can be adjusted by the differential pressure between the suction port, the suction chamber and the crank chamber, and on another side of the case of the suction check valve A guide hole is formed, and the suction check valve is positioned inside the opening / closing core so that the pressure of the crank chamber can be applied to the inside of the opening / closing core to receive the pressure of the crank chamber, and penetrates the guide hole of the case. It is preferable to further include a pressure receiving chamber to move up and down integrally with the opening and closing core.

The case is formed of a hollow cylinder through which the suction port and the discharge port respectively penetrate the one end surface in the axial direction and one side in the transverse direction, and the guide hole penetrates the other end surface in the axial direction. It is preferable that it is formed of the hollow cylinder which moves up and down in the direction, and the lower side opened, and the said pressure accommodating chamber is formed by the hollow cylinder which moves up and down along the said guide hole.

It is preferable that a pressure control hole communicating with the inside of the case and the suction chamber is formed at the lower side of the other side of the case so that the pressure of the suction chamber can act on the inside of the opening / closing core.

The case and the opening and closing core are respectively formed with a spring seating surface, the spring seating surface formed in the opening and closing core is formed with a locking jaw for fixing the spring top position to guide the one end of the spring is biased toward the center of the spring seating surface It is preferable.

The spring seating surface formed on the case is preferably formed with a spring bottom position fixing projection for inducing the lower end of the spring to be seated in the central portion of the spring seating surface.

The spring bottom position fixing protrusion is preferably formed with an inclined surface to guide the lower end of the spring to be seated smoothly on the spring seating surface formed in the case.

According to the swash plate compressor as described above, as the opening and closing core of the intake check valve descends from the inlet port, the valve opening degree gradually increases and then decreases again, so that the pulsation of the high frequency component can be effectively reduced, and the spring is opened or closed. By applying a fixing structure that regulates the end position of the spring to the spring seating surface in contact with the case so that the opening and closing core is in close contact with the inner surface of the case, it is possible to prevent the generation of vibration noise during the opening and closing core operation.

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 of the suction check valve applied to the swash plate compressor according to the first embodiment of the present invention, showing a state in which the opening degree of the suction check valve is minimum.
6 is a longitudinal sectional view of a suction check valve applied to a swash plate compressor according to a first embodiment of the present invention, showing a state in which the opening degree of the suction check valve is maximum.
7 is a longitudinal sectional view of the suction check valve applied to the swash plate compressor according to the first embodiment of the present invention, even if the opening and closing core is lowered the maximum opening degree of the suction check valve due to the action of the auxiliary opening and closing core than the maximum state Figure showing the state.
8 is a longitudinal sectional view of the suction check valve applied to the swash plate compressor according to the first embodiment of the present invention, showing a state in which the suction port of the suction check valve is properly opened during the variable operation of the compressor.
9 is a longitudinal sectional view of a suction check valve applied to a swash plate compressor according to a second embodiment of the present invention, showing a state in which the opening degree of the suction check valve is minimum.
10 is a longitudinal sectional view of a suction check valve applied to a swash plate compressor according to a second embodiment of the present invention, showing a state in which the opening degree of the suction check valve is maximum.
11 is a longitudinal cross-sectional view of the suction check valve applied to the swash plate compressor according to the second embodiment of the present invention, even if the opening and closing core is lowered the maximum opening degree of the suction check valve due to the action of the auxiliary opening and closing core than the maximum state Figure showing the state.
12 is a longitudinal cross-sectional view of a suction check valve applied to a swash plate compressor according to a second embodiment of the present invention, in which the suction port of the suction check valve is properly opened during the variable operation of the compressor.
13 is a longitudinal sectional view of a suction check valve applied to a swash plate compressor according to a third embodiment of the present invention, showing a state in which the opening degree of the suction check valve is minimum;
14 is a longitudinal sectional view of the suction check valve applied to the swash plate compressor according to the third embodiment of the present invention, even if the opening and closing core is lowered by the closing block 560 than the opening degree of the suction check valve. Figure showing a reduced state.
15 is a longitudinal sectional view of a suction check valve applied to a swash plate compressor according to a third embodiment of the present invention, showing a state in which the suction port of the suction check valve is properly opened during the variable operation of the compressor.

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

Figure 3 is a longitudinal cross-sectional view of the swash plate compressor according to the present invention, the swash plate is a view showing the inclined state with respect to the rotation axis, Figure 4 is a longitudinal sectional view of the swash plate compressor according to the present invention, the swash plate in the radial direction of the rotation axis 5 is a vertical cross-sectional view of the suction check valve applied to the swash plate compressor according to the first embodiment of the present invention, and the opening degree of the suction check valve is minimal, and FIG. A longitudinal cross-sectional view of a suction check valve applied to a swash plate compressor according to a first embodiment of the present invention, showing a state in which an opening degree of the suction check valve is maximum, and FIG. 7 is a swash plate compressor according to a first embodiment of the present invention. This is a longitudinal cross-sectional view of the suction check valve applied to the valve. And tanaen drawings, Figure 8 is a longitudinal cross-sectional view of the present is applied to a swash plate type compressor according to a first embodiment of the invention, the suction check valve is also a view showing a state in which the intake of the suction check valve when the compressor variable operating properly open.

First, the swash plate compressor according to the first embodiment of the present invention will be described with reference to FIGS. 3 to 8. The swash plate compressor according to the first embodiment of the present invention roughly includes a housing 100, a rotary shaft 200, a swash plate 300, a plurality of pistons 400, and a suction check valve 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. In addition, the rotating pulley 140 is coupled to one end of the rotating shaft 200 exposed to the outside of the front head 120, the external rotation driving force is transmitted to the rotating shaft 200 through the rotating 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 to the edge portion of the swash plate 300 in the circumferential direction so that the plurality of pistons 400 are slidably supported so as to be relatively movable.

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.

Meanwhile, in the swash plate compressor according to the present invention, the suction check valve 500 whose opening degree is adjusted according to the amount of refrigerant flowing through the suction port 131 is a pipe connecting the suction port 131 to the suction chamber 132. It is installed on the 135, and as shown in Figure 5, includes a case 510, the opening and closing core 520, and the auxiliary opening and closing core 530.

The suction check valve 500 is opened by the differential pressure between the suction port 131 and the suction chamber 132 of the rear head 130, the opening and closing core 520 due to the auxiliary opening and closing core 530 The valve opening is gradually increased and decreases again as) decreases.

The case 510 is a part forming an outer body of the suction check valve 500, and as shown in FIGS. 5 to 8, on the conduit 135 connecting the suction port 131 to the suction chamber 132. Is installed.

The case 510 is formed of a hollow cylinder such as a cylindrical body, the bottom side of the drawing is formed in a closed shape, and the cover 513 is covered on the top side on the drawing opened toward the suction port 131. In addition, one side of the case 510, that is, the center of the cover 513 is passed through the suction port 511 to form a flow path in series with the suction port 131, the other side of the case 510 A discharge port 512 communicating with the suction port 511 is formed through.

On the other hand, the opening and closing core 520 is a means for controlling the flow of the refrigerant passing through the case 510, so that the flow of the refrigerant from the inlet 511 of the case 510 to the discharge port 512 can be interrupted. In accordance with the pressure difference between the pressure of the refrigerant flowing through the suction port 511 of the case 510 (which is also the pressure of the suction port 131) and the pressure of the suction chamber 132, the case 510 is reciprocated. The opening degree of the suction check valve 500 from the suction port 511 to the discharge port 512 is adjusted.

On the other hand, the opening and closing core 520 is formed of a hollow cylinder, such as a cylindrical body reciprocating up and down inside the case 510, the lower side is opened, as shown in Figures 5 to 8, the case 510 Supported by the spring (S) is inserted into the lower end of the reciprocating movement between the top dead center and the bottom dead center that is no longer compressed by the spring (S) is restrained by the cover 513 of the case 510. The opening and closing core 520 is to reciprocate the inside of the case 510 up and down. Therefore, in order to suppress noise and vibration, the inner circumferential surface of the case 510 is preferably formed to have a size that can slide in the axial direction along the inner circumferential surface, but the opening and closing core 520 is too close to the inner circumferential surface of the case 510. If so, the opening and closing core 520 is formed to a size that can be spaced apart from the inner circumferential surface of the case 510 by a predetermined distance because it can affect the smooth reciprocating movement.

The spring S is resilient repulsion means for supporting the opening and closing core 520 as described above and is disposed between the bottom of the inner space of the case 510 and the opening and closing core 520 to support the opening and closing core 520 And serves to repel the opening / closing core 520 against the pressure of the refrigerant flowing through the inlet 511. That is, for example, when there is no pressure of the refrigerant acting through the inlet 511, as shown in FIG. 5, the opening and closing core 520 is pushed upward as much as possible, while the pressure of the refrigerant acting through the inlet 511 is increased. At this maximum, as shown in FIG. 7, the maximum compression is made toward the bottom of the case 510.

On the other hand, the discharge port 512 is formed at a position spaced apart from the inlet 511 by a predetermined distance, the lower end is formed at a position spaced from the case 510 by a predetermined distance, the opening and closing core 520 Auxiliary opening / closing core is formed on the upper end of the inlet to have a length equal to the distance between the inlet 511 and the outlet 512, and an auxiliary outlet 531 is formed on one side thereof to determine the valve opening degree along with the outlet 512. 530 is integrally formed on the opening and closing core 520 or installed by assembling.

Here, the auxiliary discharge port 531, the upper end portion 531a is formed at a position spaced apart from the upper end of the auxiliary opening and closing core 530 by a predetermined distance, the upper end portion 531a of the auxiliary discharge port 531 as described above. Due to the position of the opening and closing core 520, the upper end portion 531a of the auxiliary discharge port 531 and the upper end portion of the discharge port 512 are positioned at the same height (as shown in FIG. 6). Although the valve opening degree becomes larger, when the upper end portion 531a of the auxiliary outlet 531 becomes lower than the upper end of the outlet 512, the upper side of the outlet 512 is gradually closed by the auxiliary opening / closing core 530. As the valve opening degree decreases again, and finally the valve opening degree may not be at a maximum state even if the opening / closing core 530 is located at the bottom dead center as shown in FIG. 7.

On the other hand, the pressure of the inside of the case 510 and the suction chamber 132 so that the pressure of the suction chamber 132 acts on the inner side of the opening and closing core 520 on the lower side of the other side of the case 510. It is preferable that an adjustment hole 514 is formed. Because the discharge port 512 formed in the case 510 is limited to the middle portion of the case 510 as shown in the drawing, in this structure, the pressure of the suction chamber 132 is opened and closed through the discharge port 512. It is difficult to act inside of). Therefore, the pressure adjusting hole 514 is formed in the lower part of the case 510 so that the pressure of the suction chamber 132 acts on the inside of the opening / closing core 520 through the pressure adjusting hole 514. 520 may be reciprocated in the axial direction according to the differential pressure between the pressure of the refrigerant flowing through the suction port 511 (also the pressure of the suction port 131) and the pressure of the suction chamber 132.

As described above, the valve opening degree gradually increases as the opening / closing core 520 of the suction check valve 500 descends and moves away from the inlet 511 by the interaction between the opening / closing core 520 and the auxiliary opening / closing core 530. Then, it is configured to decrease again, and the pressure of the suction chamber 132 acts on the inside of the opening and closing core 520 through the pressure adjusting hole 514, so that the pulsation change by the rapid increase in the valve opening at the initial operation is slowed down. It is possible to effectively reduce the pulsation of the high frequency components generated during the operation of the suction check valve 500, the valve opening degree is maximum even when the opening and closing core 530 is lowered in accordance with the maximum operation of the compressor. By preventing excessive pressure change of the suction port 511, the effect of pulsation improvement can be sufficiently obtained.

Hereinafter, the swash plate compressor according to the second embodiment of the present invention will be described with reference to FIGS. 3 and 4 partially and FIGS. 9 to 12.

9 is a longitudinal cross-sectional view of a suction check valve applied to a swash plate compressor according to a second embodiment of the present invention, showing a state in which an opening degree of the suction check valve is minimum, and FIG. 10 is a second embodiment of the present invention. A longitudinal cross-sectional view of the suction check valve applied to the swash plate compressor according to the present invention is a view showing a state in which the opening degree of the suction check valve is maximum, and FIG. 11 is a longitudinal cross section of the suction check valve applied to the swash plate compressor according to the second embodiment of the present invention. As shown in FIG. 12, the opening degree of the suction check valve is reduced from the maximum state due to the action of the auxiliary opening and closing core even when the opening and closing core is lowered. Longitudinal sectional view of the applied suction check valve, showing a state in which the suction port of the suction check valve is properly opened during the variable compressor operation.

The swash plate compressor according to the second embodiment of the present invention includes a housing 100, a rotation shaft 200, a swash plate 300, a plurality of pistons 400, and a suction check valve 500. In general, similar to the swash plate compressor according to the first embodiment of the present invention described above.

However, the opening degree of the suction check valve 500 is configured to be adjusted not only by the pressure difference between the suction port 131 and the suction chamber 132 but also by the pressure of the crank chamber 121, and the spring is opened or closed core or By applying a fixed structure that regulates the end position of the spring to the spring seating surface in contact with the case to operate the opening and closing core in close contact with the inner surface of the case, in order to prevent the generation of vibration noise during operation of the opening and closing core There are differences, and the differences will be explained mainly.

As shown in FIG. 9, the suction check valve 500 applied to the swash plate compressor according to the second embodiment of the present invention includes a case 510, an opening / closing core 520, an auxiliary opening / closing core 530, A pressure receiving chamber 540. The suction check valve 500 applied to the swash plate compressor according to the second embodiment of the present invention is mainly controlled by the differential pressure between the suction port 131 and the suction chamber 132 of the rear head 130, In the variable operation, the pressure of the crank chamber 121 of the front head 120 is added to the pressure of the suction chamber 132, and the pressure difference between the suction port 131 and the suction chamber 132 and the crank chamber 121 is increased. More precise opening adjustment is achieved. The crank chamber 121 and the channel 135 are connected to each other through the passage 136 for precise opening adjustment.

On the other hand, the case 510 is a portion constituting the outer body of the suction check valve 500, as shown in Figures 5 to 7, one side is a pipe for connecting the suction port 131 to the suction chamber 132 ( 135 is installed on the other side is installed on the passage 136 connecting the crank chamber 121 and the conduit 135. At this time, an O-ring R is installed between the case 510 and the passage 136 to maintain airtightness.

The case 510 is formed of a hollow cylinder, such as a cylindrical body, the lower side in the drawing is made of a blocked shape except for the guide hole 515 through which the pressure receiving chamber 540 can be penetrated, suction A cover 513 is covered on the upper side in the figure opened toward the port 131. In addition, one side of the case 510, that is, the center of the cover 513 is passed through the suction port 511 to form a flow path in series with the suction port 131, the other side of the case 510 A discharge port 512 communicating with the suction port 511 is formed through.

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.

On the other hand, the opening and closing core 520 is formed of a hollow cylinder, such as a cylindrical body reciprocating up and down inside the case 510, the lower side is opened, as shown in Figures 9 to 12, the case 510 Supported by the spring (S) is inserted into the lower end of the reciprocating movement between the top dead center and the bottom dead center that is no longer compressed by the spring (S) is restrained by the cover 513 of the case 510. The opening and closing core 520 is to reciprocate the inside of the case 510 up and down. Therefore, in order to suppress noise and vibration, the inner circumferential surface of the case 510 is preferably formed to have a size that can slide in the axial direction along the inner circumferential surface, but the opening and closing core 520 is too close to the inner circumferential surface of the case 510. If so, the opening and closing core 520 is formed to a size that can be spaced apart from the inner circumferential surface of the case 510 by a predetermined distance because it can affect the smooth reciprocating movement.

The spring S is resilient repulsion means for supporting the opening and closing core 520 as described above and is disposed between the bottom of the inner space of the case 510 and the opening and closing core 520 to support the opening and closing core 520 And serves to repel the opening / closing core 520 against the pressure of the refrigerant flowing through the inlet 511. That is, for example, when there is no pressure of the refrigerant acting through the inlet 511, as shown in FIG. 9, the opening and closing core 520 is pushed upward as much as possible, while the pressure of the refrigerant acting through the inlet 511 is increased. At this maximum, as shown in FIG. 11, the maximum compression is made toward the bottom of the case 510.

On the other hand, the discharge port 512 is formed at a position spaced apart from the inlet 511 by a predetermined distance, the lower end is formed at a position spaced from the case 510 by a predetermined distance, the opening and closing core 520 Auxiliary opening / closing core is formed on the upper end of the inlet to have a length equal to the distance between the inlet 511 and the outlet 512, and an auxiliary outlet 531 is formed on one side thereof to determine the valve opening degree along with the outlet 512. 530 is integrally formed on the opening and closing core 520 or installed by assembling.

Here, the auxiliary discharge port 531, the upper end portion 531a is formed at a position spaced apart from the upper end of the auxiliary opening and closing core 530 by a predetermined distance, the upper end portion 531a of the auxiliary discharge port 531 as described above. Due to the position of the opening and closing core 520, the upper end 531a of the auxiliary outlet 531 and the upper end of the outlet 512 are located at the same height (as shown in FIG. 10). Although the valve opening degree becomes larger, when the upper end portion 531a of the auxiliary outlet 531 becomes lower than the upper end of the outlet 512, the upper side of the outlet 512 is gradually closed by the auxiliary opening / closing core 530. As the valve opening degree decreases again, and finally, as shown in FIG. 11, even when the opening / closing core 530 is located at the bottom dead center, the valve opening degree may not be at a maximum state.

On the other hand, the pressure of the inside of the case 510 and the suction chamber 132 so that the pressure of the suction chamber 132 acts on the inner side of the opening and closing core 520 on the lower side of the other side of the case 510. It is preferable that an adjustment hole 514 is formed. Because the discharge port 512 formed in the case 510 is limited to the middle portion of the case 510 as shown in the drawing, in this structure, the pressure of the suction chamber 132 is opened and closed through the discharge port 512. It is difficult to act inside of). Therefore, the pressure adjusting hole 514 is formed in the lower part of the case 510 so that the pressure of the suction chamber 132 acts on the inside of the opening / closing core 520 through the pressure adjusting hole 514. The sum of the pressure of the refrigerant (which is 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 crank chamber 121) 520 flows through the suction port 511. ] To reciprocate in the axial direction according to the differential pressure between them.

As described above, the valve opening degree gradually increases as the opening / closing core 520 of the suction check valve 500 descends and moves away from the inlet 511 by the interaction between the opening / closing core 520 and the auxiliary opening / closing core 530. Then, it is configured to decrease again, and the pressure of the suction chamber 132 acts on the inside of the opening and closing core 520 through the pressure adjusting hole 514, so that the pulsation change by the rapid increase in the valve opening at the initial operation is slowed down. It is possible to effectively reduce the pulsation of the high frequency components generated during the operation of the suction check valve 500, the valve opening degree is maximum even when the opening and closing core 530 is lowered in accordance with the maximum operation of the compressor. By preventing excessive pressure change of the suction port 511, the effect of pulsation improvement can be sufficiently obtained.

On the other hand, the pressure receiving chamber 540 is a means for allowing the pressure of the crank chamber 121 to additionally act on the opening and closing core 520, the suction port 131 applied to the opening and closing core 520 during the variable operation By the pressure of the crank chamber 121 to be added to the pressure of the suction chamber 132 to correspond to the pressure of the), even if the pressure of the suction port 131 is excessively adjusted by the opening and closing core 520 The opening degree of the discharge port 512 to be adjusted can be adjusted appropriately.

To this end, the pressure receiving chamber 540 has a space 540a formed therein so that the pressure of the crank chamber 121 can be applied to the inside of the opening and closing core 520, the inside of the opening and closing core 520 Located in the through-hole guide hole 514 of the case 510 is formed of a hollow cylinder, such as a cylindrical body moving up and down integrally with the opening and closing core 520.

On the other hand, the bottom of the inner space of the case 510, that is, the portion of the lower side of the inner space in the drawing except for the guide hole 515 forms a spring seating surface 516 in contact with the lower end of the spring (S). In addition, a pressure action plate 521 is formed on the unopened upper side of the opening / closing core 520 to receive the pressure of the suction port 121, the suction chamber 132, and the crank chamber 121. A portion of the inner side surface 521a of the inner surface 521a except for the portion where the pressure receiving chamber 530 is located forms a spring seating surface 521aa to which the upper end of the spring S contacts.

On the other hand, it is necessary to induce the opening and closing core 520 to be in close contact with one side of the case 510 to prevent the generation of vibration noise during the operation of the opening and closing core 520. To this end, the spring seating surface 521aa formed at the opening and closing core 520 has a spring top position fixing jaw 521aaa for inducing one side of the upper end of the spring S to be biased toward the center of the spring seating surface 521aa. And a spring seating surface fixing protrusion 516a for inducing a lower end of the spring S to be seated at a central portion of the spring seating surface 516 on the spring seating surface 516 formed in the case 510. It is preferable to form. In addition, it is preferable that the inclined surface 516aa is formed in the spring lower position fixing protrusion 516a to guide the lower end of the spring S to be smoothly seated on the spring seating surface 516 formed on the case 510. .

As such, a spring top position fixing jaw 521aaa is formed on the spring seating surface 521aa formed on the opening and closing core 520, and a spring bottom position fixing protrusion (50) is formed on the spring seating surface 516 formed on the case 510. By forming the 516a, the spring S supports the opening / closing core 520 in an oblique position with respect to the opening / closing core 520 and the case 510 as shown in FIGS. 9 to 12. Accordingly, an unbalance occurs in the repulsive force of the spring S for elastically supporting the opening / closing core 520 while the compression degree of the spring S on the left and right sides of the drawing is changed based on the pressure receiving chamber 540. Then, the opening and closing core 520 is inclined in the oblique direction of the spring (S), a portion of the side of the opening and closing core 520 is in close contact with the inner peripheral surface of the case 510.

As such, when a part of the sides of the opening and closing core 520 is kept in close contact with the inner circumferential surface of the case 510, the opening and closing core 520 reciprocates in the case 510 and the side of the opening and closing core 520. Even if a gap Gap exists between inner circumferential surfaces of the case 510, vibration noise may be prevented during the reciprocating movement of the opening / closing core 520.

Hereinafter, a swash plate compressor according to a third embodiment of the present invention will be described with reference to FIGS. 3 and 4 partially and FIGS. 13 to 15.

13 is a longitudinal cross-sectional view of a suction check valve applied to a swash plate compressor according to a third embodiment of the present invention, showing a state in which an opening degree of the suction check valve is minimum, and FIG. 14 is a third embodiment of the present invention. The longitudinal cross-sectional view of the suction check valve applied to the swash plate compressor according to the present invention shows a state in which the opening degree of the suction check valve is reduced from the maximum state by the closing block 560 even when the opening / closing core is lowered to the maximum. Longitudinal cross-sectional view of a suction check valve applied to a swash plate compressor according to a third embodiment of the present invention, showing a state in which the suction port of the suction check valve is properly opened during the variable operation of the compressor.

The swash plate compressor according to the third embodiment of the present invention includes a housing 100, a rotation shaft 200, a swash plate 300, a plurality of pistons 400, and a suction check valve 500. The opening degree of the suction check valve 500 is configured to be adjusted not only by the differential pressure between the suction port 131 and the suction chamber 132 but also by the pressure of the crank chamber 121, and the spring is connected to the opening / closing core or the case. Applying a fixed structure that regulates the end position of the spring to the spring seating surface to be contacted to operate in close contact with the inner surface of the case, it is configured to prevent the generation of vibration noise during the operation of the core It is generally similar to the swash plate compressor according to the second embodiment of the present invention described.

However, as the opening / closing core 520 descends, there is a difference in the structure that the valve opening degree gradually increases and then decreases again. That is, in detail, the auxiliary opening / closing core 530 shown in FIGS. 9 to 12 is not applied, and the inlet port closing block 560 formed at the end of the connecting rod 550 as shown in FIGS. 13 and 15 is shown. The valve opening is configured to be auxiliary adjusted.

Hereinafter, a description will be given of the difference between the swash plate compressor according to the second embodiment of the present invention and the swash plate compressor according to the third embodiment.

As shown in FIG. 13, the suction check valve 500 applied to the swash plate compressor according to the third embodiment of the present invention includes a case 510, an opening / closing core 520, a pressure receiving chamber 540, And a connecting rod 550 and a block for closing the inlet portion 560.

The case 510 is a portion constituting the outer body of the suction check valve 500, and as shown in FIGS. 13 to 15, one side of the pipe 135 connects the suction port 131 to the suction chamber 132. The other side is installed on the passage 136 connecting the crank chamber 121 and the conduit 135. At this time, an O-ring R is installed between the case 510 and the passage 136 to maintain airtightness.

The case 510 is formed of a hollow cylinder, such as a cylindrical body, the lower side in the drawing is made of a shape blocked except for the guide hole 514 through which the pressure receiving chamber 530 can be penetrated, suction A cover 513 is covered on the upper side in the figure opened toward the port 131, and a suction port 511 penetrating the suction port 131 is formed in the center of the cover 513. 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.

On the other hand, the opening and closing core 520 is formed of a hollow cylinder, such as a cylindrical body reciprocating up and down inside the case 510, the lower side is opened, as shown in Figures 13 to 15, the case 510 Supported by the spring (S) is inserted into the lower end of the reciprocating movement between the top dead center and the bottom dead center that is no longer compressed by the spring (S) is restrained by the cover 513 of the case 510. The opening and closing core 520 is to reciprocate the inside of the case 510 up and down. Therefore, in order to suppress noise and vibration, the inner circumferential surface of the case 510 is preferably formed to have a size that can slide in the axial direction along the inner circumferential surface, but the opening and closing core 520 is too close to the inner circumferential surface of the case 510. If so, the opening and closing core 520 is formed to a size that can be spaced apart from the inner circumferential surface of the case 510 by a predetermined distance because it can affect the smooth reciprocating movement.

The spring S is resilient repulsion means for supporting the opening and closing core 520 as described above and is disposed between the bottom of the inner space of the case 510 and the opening and closing core 520 to support the opening and closing core 520 And serves to repel the opening / closing core 520 against the pressure of the refrigerant flowing through the inlet 511. That is, for example, when there is no pressure of the refrigerant acting through the inlet 511, as shown in FIG. When the pressure of the refrigerant acting through is maximum, as shown in FIG. 14, the pressure is maximally compressed toward the bottom of the case 510 to open the discharge port 512 as much as possible.

On the other hand, the connecting rod 550 is formed in a rod shape formed to have a predetermined length in the axial direction in which the opening and closing core 520 is reciprocated, it is installed or integrally formed on the upper end of the opening and closing core 520.

In addition, at the end of the connecting rod 550, the inlet portion closing block 560 for gradually reducing the open cross-sectional area of the inlet 511 is provided or integrally formed after the opening / closing core 520 is lowered by a predetermined length. do.

Here, the inlet port closing block 560 is formed such that the cross-sectional area is gradually increased until the distance from the upper end of the connecting rod 550 by a predetermined distance. Therefore, since the partial closing block 560 gradually reduces the open cross-sectional area of the inlet 511 after the opening / closing core 520 descends a certain length, the valve opening degree gradually increases as the opening / closing core 520 descends. It will decrease again.

In addition, the suction port part closing block 560 is formed such that the cross-sectional area is gradually smaller as the distance from the upper end of the connecting rod 550 from a position away from the upper end of the connecting rod 550 by a predetermined distance. The rear shape of the partial closing block 560 is a flow of refrigerant flowing into the inlet 511 when the inlet partial closing block 560 closes a part of the inlet 511. The shape is considered to minimize the degree of disconnection by) to allow the refrigerant to flow smoothly through the inlet 511.

On the other hand, the spring mounting position fixing jaw (521aaa) is formed on the spring seating surface (521aa) formed in the opening and closing core 520, and the spring bottom position fixing projection (50) on the spring seating surface 516 formed on the case 510 ( 516a is formed so that the spring S supports the opening / closing core 520 in a state in which the spring S is obliquely positioned with respect to the opening / closing core 520 and the case 510. The reciprocating movement in close contact with the inner circumferential surface of the 510 to prevent the shaking noise during the operation of the opening and closing core 520 is the same as the case of the second embodiment of the present invention described above.

In addition, a space portion 540a is formed therein so that the pressure of the crank chamber 121 may be applied to the inside of the opening and closing core 520, and the opening and closing core 520 passes through the guide hole 514 of the case 510. The pressure receiving chamber 540, which is formed of a hollow cylinder such as a cylindrical body that moves up and down integrally, is located inside the opening / closing core 520, as in the case of the second embodiment of the present invention.

In addition, the pressure adjusting hole 514 communicating the inside of the case 510 and the suction chamber 132 at one lower side of the case 510 so that the pressure of the suction chamber 132 may act on the inside of the opening / closing core 520. ) Is the same as in the second embodiment of the present invention described above.

In the suction check valve 500 applied to the swash plate compressor according to the third embodiment of the present invention, as described above, the opening / closing core 520 of the suction check valve 500 descends and moves away from the suction port 511. Applying the inlet portion closing block 560 so that the valve opening gradually increases and then decreases again, the pressure of the suction chamber 132 acts inside the opening / closing core 520 through the pressure adjusting hole 514. In the initial operation, the pulsation change may be smoothed due to the rapid increase in the valve opening, and the pulsation of the high frequency components generated during the operation of the suction check valve 500 may be effectively reduced. Even when the 530 is maximally lowered, the valve opening degree is not maximized to prevent excessive pressure change of the inlet 511, thereby sufficiently obtaining the effect of pulsation improvement. .

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

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 blocking the inlet 511 of the suction check valve 500 reaches the bottom dead center 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 the minimum, in this case, as shown in Figure 5, 9, 13, the opening and closing core 520 is raised as much as possible by the reaction force of the spring (S) Position, the valve opening is minimized.

Meanwhile, as the inclination of the swash plate 300 varies during variable operation of the swash plate type compressor, the refrigerant pressure acting on the opening / closing core 520 through the suction port 511 is changed, but the suction port 511 and the suction chamber 132 are changed. When the differential pressure is greater than or equal to a certain limit, the opening and closing core 520 descends to the maximum even when the maximum variable is not, and the spring S is also compressed to the maximum. However, in this case, in the first embodiment of the present invention, as shown in FIG. 8, the pressure of the suction chamber 132 acts inside the opening / closing core 520 through the pressure adjusting hole 514 to open and close the core 520. By raising, the opening degree of the discharge port 512 can be adjusted appropriately.

In addition, in the second and third embodiments of the present invention, as shown in FIGS. 12 and 15, the pressure of the refrigerant from the crank chamber 121 is opened and closed through the pressure receiving chamber 530. By opening the opening / closing core 520 by acting on the inner side surface 521a of the pressure action plate 521, the opening degree of the discharge port 512 can be adjusted appropriately.

That is, in a case where the pressure of the suction port 131 is excessive in a situation where the maximum variable is not variable, the discharge opening 512 may be adjusted to the maximum opening degree by the opening / closing core 520. In the case of the example, the pressure of the suction chamber 132 acts on the opening and closing core 520 in a direction opposite to the pressure direction of the suction port 131, so that the final adjusted opening degree can be reduced as shown in FIG. In the second and third embodiments of the present invention, the pressure of the suction chamber 132 and the pressure of the crank chamber 121 act on the opening and closing core 520 in a direction opposite to the pressure direction of the suction port 131. 12 and 15, the final adjusted opening degree can be reduced.

In addition, in the opening and closing core 520 of the suction check valve 500 is moved up and down in the process of operating the suction check valve 500 as described above, the following effects according to each embodiment of the present invention: Can get them.

In the case of the first and second embodiments of the present invention, the opening and closing core 520 of the suction check valve 500 is lowered by the interaction between the opening and closing core 520 and the auxiliary opening and closing core 530 so that the inlet 511 is closed. It is configured to gradually increase and decrease the valve opening as it moves away from, and the pressure of the suction chamber 132 acts on the inside of the opening / closing core 520 through the pressure adjusting hole 514, so that the rapid opening of the valve increases during the initial operation. Due to the pulsation change can be smoothed, the pulsation of the high frequency components generated during the operation of the suction check valve 500 can be effectively reduced. In addition, even when the opening / closing core 530 is maximally lowered according to the maximum operation of the compressor, as shown in FIGS. 7 and 11, the opening degree of the valve does not become the maximum, thereby preventing excessive pressure change of the inlet 511, thereby pulsating The effect of improvement can fully be obtained.

In addition, in the case of the third embodiment of the present invention, the opening degree of the valve 520 of the suction check valve 500 is lowered by the inlet portion closing block 560 so that the valve opening degree gradually increases as the distance from the inlet 511 increases. Again, the pressure of the suction chamber 132 inside the opening and closing core 520 through the pressure adjusting hole 514, the pulsation change by the rapid increase in the valve opening at the initial operation can be smoothed, The pulsation of the high frequency components generated during operation of the suction check valve 500 can be effectively reduced. In addition, even when the opening / closing core 530 is maximally lowered according to the maximum operation of the compressor, the opening degree of the valve is not maximized as shown in FIG. You can get enough.

In addition, in the second and third embodiments of the present invention, the spring S supporting the opening / closing core 520 during the operation of the suction check valve 500 is shown in FIGS. 9 to 12 or 13 to 13. As shown in FIG. 15, a part of the side surface of the opening / closing core 520 is reciprocated in the case 510 while being in close contact with the inner circumferential surface of the case 510. Therefore, even if a gap Gap exists between the side of the opening and closing core 520 and the inner circumferential surface of the case 510, the vibration noise during the reciprocating movement of the opening and closing core 520 can be prevented.

According to the swash plate compressor according to the embodiment of the present invention described above, as the opening and closing core of the suction check valve descends from the suction port, the valve opening degree gradually increases and then decreases again, so that the pulsation of the high frequency component can be effectively reduced. By applying a fixing structure that regulates the end position of the spring to the spring seating surface where the spring is in contact with the opening core or the case, the opening core is in close contact with the inner surface of the case, thereby preventing the occurrence of tremor noise during operation of the opening core. It becomes possible.

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: crankcase
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: suction port 512: discharge port
516: spring seating surface 516a: spring fixing position fixing bottom
516aa: slope 520: opening and closing core
521aa: Spring seating surface 521aaa: Spring fixing position of jaw
530: auxiliary opening and closing core 531: auxiliary outlet
540: pressure receiving chamber 540a: space part
550: connecting rod 560: block for closing the inlet portion

Claims (18)

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 to penetrate one side of the housing 100;
A swash plate 300 installed on the rotary shaft 200 to be integrally rotated with the rotary shaft 200 and installed so that an angle with respect to the rotary shaft 200 can be changed so that the amount of refrigerant discharge 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
The discharge port 512 is installed on the conduit 135 connecting the suction port 131 to the suction chamber 132, and the suction port 511 penetrates on one side thereof, and the discharge port 512 communicates with the suction port 511 on the other side thereof. Opening and closing core 520 is supported through the case 510 and the inside of the case 510 via a spring (S) to adjust the flow of the refrigerant from the suction port 511 to the discharge port 512. And a suction check valve (500) having a structure in which the valve opening degree gradually increases and then decreases again as the opening / closing core (520) descends. The method according to claim 1,
The discharge port 512 is formed at a position spaced apart from the suction port 511 by a predetermined distance, and an upper end of the opening / closing core 520 has a length equal to the distance between the suction port 511 and the discharge port 512. It is formed to have, and the swash plate compressor characterized in that the auxiliary opening and closing core 530 is formed on one side is formed with the auxiliary discharge port 531 to determine the valve opening degree. The method according to claim 2,
The auxiliary discharge port 531, the swash plate-type compressor, characterized in that the upper end portion (531a) is formed at a position spaced apart from the upper end of the auxiliary opening and closing core 530 by a predetermined distance. The method according to claim 3,
The pressure adjusting hole communicating with the inside of the case 510 and the suction chamber 132 so that the pressure of the suction chamber 132 acts on the inner side of the opening and closing core 520 at the lower side of the other side of the case 510. A swash plate compressor, characterized in that 514 is formed. The method according to any one of claims 2 to 4,
The crank chamber 121 and the conduit 135 may be opened so that the opening degree of the suction check valve 500 can be adjusted by the differential pressure between the suction port 131, the suction chamber 132, and the crank chamber 121. A passage 136 for connecting is further formed, a guide hole 515 is formed at another side of the case 510 of the suction check valve 500, and the suction check valve 500 is the crank chamber 121. ) Is positioned inside the opening / closing core 520 to receive the pressure in the opening / closing core 520 to receive the pressure of the crank chamber 121, and guide holes 515 of the case 510. The swash plate compressor further comprises a pressure receiving chamber (540) moving up and down integrally with the opening and closing core (520) through. The method according to claim 5,
The case 510 is formed of a hollow cylinder in which the suction port 511 and the discharge port 512 penetrate through one end surface in the axial direction and one side in the transverse direction, respectively, and the guide hole 515 penetrates in the other end surface in the axial direction. The opening / closing core 520 is formed of a hollow cylinder having an up and down movement in the axial direction along the inner circumferential surface of the case 510, and a lower side thereof being opened, and the pressure receiving chamber 540 is along the guide hole 515. A swash plate compressor, which is formed of a hollow cylinder that moves up and down. The method of claim 6,
Spring mounting surfaces 516 and 521aa are formed on the case 510 and the opening / closing core 520, respectively, and an upper end side of the spring S is formed on the spring mounting surface 521aa formed on the opening / closing core 520. A swash plate type compressor, characterized in that a spring top position fixing jaw (521aaa) is formed to be biased toward the center of the seating surface (521aa). The method of claim 7,
The spring seating surface 516 formed on the case 510 is provided with a spring bottom position fixing protrusion 516a for inducing the lower end of the spring S to be seated at the center of the spring seating surface 516. Swash plate compressor. The method according to claim 8,
The swash plate, characterized in that the inclined surface (516aa) is formed in the spring lower position fixing projection (516a) to guide the lower end of the spring (S) smoothly seated on the spring seating surface 516 formed on the case 510. Type compressor. The method according to claim 1,
A connecting rod 550 having a predetermined length in the axial direction is connected to an upper end of the opening / closing core 520, and an end portion of the connecting rod 550 is opened after the opening / closing core 520 descends a predetermined length. A swash plate compressor, characterized in that the inlet portion closing block 560 for gradually reducing the open cross-sectional area of the 511. The method of claim 10,
The inlet portion closing block 560 is a swash plate compressor characterized in that the cross-sectional area is gradually increased until the distance from the upper end of the connecting rod 550 by a predetermined distance. The method of claim 11,
The inlet portion closing block 560 is a swash plate type characterized in that the cross-sectional area is gradually reduced from the position away from the upper end of the connecting rod 550 by a predetermined distance from the upper end of the connecting rod 550 compressor. The method according to any one of claims 10 to 12,
A passage connecting the crank chamber and the conduit is further formed so that the opening degree of the suction check valve 500 can be adjusted by the differential pressure between the suction port, the suction chamber and the crank chamber, and the suction check valve 500 Another side of the case 510 is formed with a guide hole 515, the suction check valve 500 is the opening and closing core so that the pressure of the crank chamber 121 can be applied to the inside of the opening and closing core 520 A pressure receiving chamber positioned inside the 520 to receive the pressure of the crank chamber 121 and move up and down integrally with the opening / closing core 520 through the guide hole 515 of the case 510. A swash plate compressor further comprises. The method according to claim 13,
The case 510 is formed of a hollow cylinder in which the suction port 511 and the discharge port 512 penetrate through one end surface in the axial direction and one side in the transverse direction, respectively, and the guide hole 515 penetrates in the other end surface in the axial direction. The opening / closing core 520 is formed of a hollow cylinder having an up and down movement in the axial direction along the inner circumferential surface of the case 510, and a lower side thereof being opened, and the pressure receiving chamber 540 is along the guide hole 515. A swash plate compressor, which is formed of a hollow cylinder that moves up and down. The method according to claim 14,
The pressure adjusting hole communicating with the inside of the case 510 and the suction chamber 132 so that the pressure of the suction chamber 132 acts on the inside of the opening / closing core 520 at the lower side of the other side of the case 510. A swash plate compressor, characterized in that 514 is formed. 16. The method of claim 15,
Spring mounting surfaces 516 and 521aa are formed on the case 510 and the opening / closing core 520, respectively, and an upper end side of the spring S is mounted on the spring mounting surface 521aa formed on the opening / closing core 520. The swash plate compressor, characterized in that the spring top position fixing jaw (521aaa) is guided to be biased toward the center of the surface (521aa). 18. The method of claim 16,
The spring seating surface 516 formed on the case 510 is provided with a spring bottom position fixing protrusion 516a for inducing the lower end of the spring S to be seated at the center of the spring seating surface 516. Swash plate compressor. 18. The method of claim 17,
The swash plate, characterized in that the inclined surface (516aa) is formed in the spring lower position fixing projection (516a) to guide the lower end of the spring (S) smoothly seated on the spring seating surface 516 formed on the case 510. Type compressor.

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