KR102706573B1 - Swash-plate type compressor - Google Patents

Abstract

The present invention comprises: a cylinder block having a cylinder bore formed therein and a piston reciprocally installed in the cylinder bore; a swash plate housing installed on one side of the cylinder block and having a swash plate room formed therein, wherein a drive shaft, a lug plate coupled to the drive shaft and configured to rotate, and a swash plate coupled to the lug plate and having an inclination adjusted with respect to the drive shaft and configured to reciprocate the piston are installed; an input/output housing installed on the other side of the cylinder block and having a suction room formed in which refrigerant is sucked into the cylinder bore and a discharge room formed in which refrigerant is discharged from the cylinder bore; a valve plate interposed between the cylinder block and the input/output housing and having a control communication hole formed between the swash plate room and the suction room; And a swash plate type compressor including a CS valve installed in a valve pressurization path formed in the cylinder block so as to communicate the swash plate room and the control communication hole, and controlling the area of the control communication hole according to pressurization by the refrigerant present in the swash plate room, thereby controlling the amount of refrigerant discharged through the control communication hole is provided.

Description

Swash-plate type compressor

The present invention relates to a swash plate compressor, and more specifically, to a swash plate compressor that sucks in and discharges refrigerant by rotating a swash plate whose inclination is adjusted with respect to a driving shaft.

In general, a compressor is a device that compresses a fluid by receiving external power, and is widely used in air conditioning or cooling devices. Among these, the compressor that constitutes an air conditioning device for an automobile is driven by selectively receiving power from a power source through the interlocking action of an electromagnetic clutch. And this automobile compressor sucks refrigerant gas from the evaporator into it, compresses it, and then discharges it to the condenser side.

A general swash plate compressor, which is widely used as a compressor for air conditioning systems in automobiles, refers to a compressor that sucks in and discharges refrigerant by rotating a swash plate whose inclination is adjusted with respect to a drive shaft. A swash plate compressor is designed so that a disk-shaped swash plate with a constant inclination angle is installed on a drive shaft that receives power from an engine and rotates by the drive shaft. In this swash plate compressor, by the rotation of the swash plate, a plurality of pistons connected through shoes arranged along the circumference of the swash plate reciprocate in a straight line inside a plurality of cylinder bores formed in a cylinder block, thereby sucking in, compressing, and discharging refrigerant gas.

Meanwhile, in order to control the refrigerant pressure in the swash plate chamber where the swash plates are arranged, the conventional swash plate compressor has a suction chamber into which refrigerant is introduced from the outside into the swash plate compressor, and a separate passage connecting the swash plate chamber to the inside. In addition, in the conventional swash plate compressor, a separate valve is arranged inside the passage connecting the discharge chamber and the swash plate chamber.

At this time, in the conventional swash plate type compressor, when the rotation speed of the swash plate is sufficiently increased or the cooling load is small and variable capacity is controlled, a considerable amount of refrigerant is recovered from the swash plate room to the suction room. Therefore, in the conventional swash plate type compressor, not only is the compression efficiency of the refrigerant kept low, but in order to achieve the cooling performance desired by the operator, the power supplied from the engine to the swash plate type compressor must be increased, which causes a problem in that the fuel efficiency of the vehicle also deteriorates.

Republic of Korea Publication Patent No. 10-1992-0021870 (Title of invention: Saw-plate type compressor)

The present invention has been created to solve the above problems, and its purpose is to provide a swash plate type compressor capable of optimally controlling the area of a passage through which refrigerant recovered from a swash plate chamber to a suction chamber passes depending on the operating state.

The present invention comprises: a cylinder block having a cylinder bore formed therein and a piston reciprocally installed in the cylinder bore; a swash plate housing installed on one side of the cylinder block and having a swash plate room formed therein, wherein a drive shaft, a lug plate coupled to the drive shaft and configured to rotate, and a swash plate coupled to the lug plate and having an inclination adjusted with respect to the drive shaft and configured to reciprocate the piston are installed; an input/output housing installed on the other side of the cylinder block and having a suction room formed in which refrigerant is sucked into the cylinder bore and a discharge room formed in which refrigerant is discharged from the cylinder bore; a valve plate interposed between the cylinder block and the input/output housing and having a control communication hole formed between the swash plate room and the suction room; And a CS valve which is installed in the valve pressurization passage formed in the cylinder block so as to communicate the swash plate room and the control communication hole, and which adjusts the area of the control communication hole as it is pressurized by the refrigerant present in the swash plate room, thereby controlling the amount of refrigerant discharged through the control communication hole, wherein the CS valve includes a hollow fixed member arranged so that its outer circumference is fixedly coupled to the inner wall of the valve pressurization passage, and an opening/closing member which is installed penetrating the fixed member so as to be movable with respect to the fixed member, and is arranged so that one end faces the swash plate room and the other end faces the control communication hole, and which moves in a direction in which the other end reduces the area of the control communication hole as one end is pressurized by the refrigerant flowing into the valve pressurization passage from the swash plate room, and the opening/closing member includes an opening/closing rod which is movably arranged inside the fixed member, and an opening/closing rod which is coupled to one end of the opening/closing rod on the swash plate room side and has a diameter larger than that of the opening/closing rod. The present invention provides a swash plate type compressor, which further includes an opening/closing member, an elastic member disposed between the fixed member and the opening/closing member and pressurizing the opening/closing member toward the swash plate chamber, and a stop ring which is coupled to an outer peripheral surface of the other end side of the opening/closing member and is selectively seated on a surface of the fixed member on the control communication hole side to prevent the opening/closing member from being separated from the fixed member toward the swash plate chamber by the elastic member.

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The above control communication hole is formed with a shape smaller than the diameter of the other end of the opening/closing member, and the opening/closing member operates so that when one end is pressurized by the refrigerant flowing into the valve pressurized passage from the swash plate chamber, the other end closes the entire control communication hole, and the cylinder block is arranged in parallel with the valve pressurized passage, and a block communication room into which refrigerant flows from the swash plate chamber is formed, and the valve plate is formed with a permanent communication hole connecting the block communication room and the suction chamber.

The above control communication hole is formed in a slot shape that is longer than the diameter of the other end of the opening/closing member, and the opening/closing member operates so that when one end is pressurized by the refrigerant flowing into the valve pressurization passage from the swash plate room, the other end closes a part of the control communication hole.

The above valve pressurization path includes an elastic path in which one end of the opening/closing member is arranged, and a fixed path arranged between the elastic path and the control communication hole and having an inner diameter larger than that of the elastic path, in which the fixed member is arranged, and the opening/closing member is formed such that one end is in contact with the inner wall of the elastic path.

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The cylinder block is arranged in parallel with the valve pressurization path, and a block communication room is formed in which refrigerant flows from the swash plate room, and the valve plate connects the block communication room and the control communication hole, and a valve communication path is formed between the valve pressurization path and the control communication hole.

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According to the swash plate type compressor according to the present invention, during initial operation, the area of the control communication hole is expanded so that the swash plate chamber refrigerant is quickly discharged to the suction chamber, so that the inclination angle of the swash plate quickly reaches the maximum inclination angle, and under variable capacity operating conditions where the inclination angle changes, the area of the control communication hole is reduced so that the amount of refrigerant recovered to the suction chamber can be reduced. Accordingly, according to the swash plate type compressor according to the present invention, the compression efficiency of the refrigerant and the fuel efficiency of the vehicle can be improved.

FIG. 1 is a cross-sectional view of a swash plate compressor according to a first embodiment of the present invention.
Figure 2 is an enlarged view of part A shown in Figure 1, showing the CS valve opening the control communication hole.
Figure 3 is an enlarged view of part A shown in Figure 1, showing the CS valve closing the control communication hole.
Figure 4 is a perspective view of the CS valve shown in Figure 1.
Figure 5 is a cross-sectional view of a swash plate compressor according to a second embodiment of the present invention.
Figure 6 is an enlarged view of part B shown in Figure 5, showing the CS valve opening the control communication hole.
Figure 7 is an enlarged view of part B shown in Figure 5, showing the CS valve closing the control communication hole.
Figure 8 is a perspective view of the CS valve and valve plate when viewing the valve plate from the cylinder block side in Figure 5.

Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical idea of the appended claims.

Referring to FIGS. 1 to 4, a swash plate type compressor (1000) according to a first embodiment of the present invention includes a cylinder block (1100), a swash plate housing (1200), an inlet/outlet housing (1300), a valve plate (1400), a CS valve (1500), and a gasket (1600).

The cylinder block (1100) is arranged between the swash plate housing (1200) and the intake/exit housing (1300), has a cylinder bore (1110) formed inside, and a piston (1120) is installed in the cylinder bore (1110) so as to be reciprocally operable. The cylinder bores (1110) may be arranged in parallel with each other along the circumferential direction of the cylinder block (1100), and the pistons (1120) may also be provided in multiple numbers and arranged in each of the cylinder bores (1110).

In the cylinder block (1100), a valve pressurization path (1130) is formed. The valve pressurization path (1130) is formed between the swash plate chamber (1210) of the swash plate housing (1200) and the suction chamber (1310) of the intake/exit housing (1300), and the CS valve (1500) is arranged. In addition, the valve pressurization path (1130) includes an elastic path (1131) and a fixed path (1132). The elastic path (1131) is arranged on the swash plate chamber (1210) side. The fixed path (1132) is formed to have an inner diameter larger than that of the elastic path (1131), and is arranged between the elastic path (1131) and the suction chamber (1310).

The above-described swash plate housing (1200) is installed on one side of the cylinder block (1100), and a swash plate room (1210) is formed inside. A drive shaft (1220), a lug plate (1230), and a swash plate (1240) are arranged inside the swash plate room (1210). One end of the drive shaft (1220) is inserted into the swash plate housing (1200), and the other end is rotatably installed in the cylinder block (1100). The drive shaft (1220) rotates by power transmitted from an external power source. Meanwhile, a block communication room (1150) is formed inside the cylinder block (1100), which is arranged in parallel with the valve pressurization passage (1130) and into which refrigerant flows from the swash plate room (1210). The refrigerant present in the above-mentioned refrigerant chamber (1210) is supplied to the block communication chamber (1150) through a path formed inside the above-mentioned driving shaft (1220).

The lug plate (1230) is coupled to the outer surface of the drive shaft (1220) and rotates together with the drive shaft (1220). The swash plate (1240) is coupled to the drive shaft (1220) to form a predetermined inclination angle and is coupled to the lug plate (1230). A shoe is installed on the outer end of the swash plate (1240), and the shoe is installed to be able to slide on the piston (1120). When the swash plate (1240) rotates by the drive shaft (1220), the inclination angle of the swash plate (1240) with respect to the drive shaft (1220) changes. Accordingly, the piston (1120) reciprocates in a linear direction by the shoe, and the refrigerant introduced into the suction chamber (1310) from the outside is introduced into the cylinder bore (1110) and then discharged to the outside through the discharge chamber (1320).

The above-mentioned intake/exit housing (1300) is installed on the other side of the cylinder block (1100), and has the suction chamber (1310) and discharge chamber (1320) formed inside. The suction chamber (1310) and discharge chamber (1320) are formed to be in communication with each of the plurality of cylinder bores (1110) formed in the cylinder block (1100).

Referring to FIGS. 2 and 3, the valve plate (1400) is interposed between the cylinder block (1100) and the input/output housing (1300), and a control communication hole (1410) and a valve communication path (1420) are formed. The control communication hole (1410) is arranged between the fixed path (1132) and the suction chamber (1310). The valve communication path (1420) is formed to communicate the block communication room (1150) and the control communication hole (1410). Therefore, the refrigerant introduced into the interior of the drive shaft (1220) from the swash plate room (1210) flows into the suction chamber (1310) through the block communication room (1150) and the control communication hole (1410).

Referring to FIGS. 2 to 4, the CS valve (1500) is installed in the valve pressurization path (1130) and includes a fixing member (1510), an opening/closing member (1520), an elastic member (1530), and a stop ring (1540). The fixing member (1510) is formed in a hollow cylindrical shape and is arranged so that its outer circumference is in contact with the inner wall of the fixing path (1132). In addition, the fixing member (1510) is arranged so that it is fixed on the fixing path (1132) as its outer circumference is coupled to the inner wall of the fixing path (1132). The above-described opening/closing member (1520) is installed so as to penetrate the above-described fixed member (1510), and is arranged so that one end faces the swash plate room (1210) and the other end faces the control communication hole (1410). In addition, the opening/closing member (1520) includes an opening/closing rod (1521) and an opening/closing end (1522). The opening/closing rod (1521) has a diameter formed smaller than that of the above-described fixed member (1510), and is installed so as to penetrate the above-described fixed member (1510) so as to be movable with respect to the above-described fixed member (1510). The opening/closing end (1522) is coupled to one end of the opening/closing rod (1521) on the swash plate room (1210) and has a diameter formed larger than that of the opening/closing rod (1521). As the opening/closing end (1522) is pressurized by the refrigerant flowing from the above-mentioned swash plate (1210) to the above-mentioned elastic path (1131), the opening/closing member (1520) moves toward the above-mentioned suction chamber (1310), and accordingly, the other end of the opening/closing rod (1521) closes the above-mentioned control communication hole (1410).

At this time, the opening/closing member (1520) is not formed as a hollow structure like the fixed member (1510), but is formed as a structure whose interior is filled. In this case, the opening/closing end (1522) is arranged so as to completely close the elastic flow path (1131), so that the refrigerant flowing into the elastic flow path (1131) from the swash plate chamber (1210) is blocked by the opening/closing end (1522) and cannot flow toward the fixed flow path (1132). Accordingly, the refrigerant existing in the swash plate chamber (1210) can flow to the block communication chamber (1150) through the flow path inside the drive shaft (1220), and then flow to the suction chamber (1310) only through the valve communication flow path (1420) and the control communication hole (1410).

The elastic member (1530) is arranged between the opening/closing end (1522) and the fixed member (1510), and is arranged to surround the outer surface of the opening/closing bar (1521). In addition, the elastic member (1530) presses the opening/closing end (1522) toward the swash plate chamber (1210) with respect to the fixed member (1510). The stop ring (1540) is selectively seated on the surface of the fixed member (1510) on the control communication hole (1410) side, thereby preventing the opening/closing member (1520) from being separated from the fixed member (1510) toward the swash plate chamber (1210) by the elastic member (1530). That is, since the force with which the elastic member (1530) presses the opening/closing end (1522) is greater than the force with which the opening/closing end (1522) is pressurized by the refrigerant pressure difference between the swash plate chamber (1210) and the suction chamber (1310), when the opening/closing member (1520) moves toward the swash plate chamber (1210) by the elastic member (1530), the stop ring (1540) is secured to the surface of the fixed member (1510) on the control communication hole (1410) side, thereby limiting the movement of the opening/closing member (1520). Accordingly, the stop ring (1540) enables the opening/closing member (1520) to continuously perform the opening/closing operation with respect to the control communication hole (1410) on the valve pressurization passage (1130).

The above gasket (1600) is arranged between the CS valve (1500) and the valve plate (1400), and has a gasket communication hole (1610) formed therein. The gasket communication hole (1610) is formed to communicate with the fixed flow path (1132) and the control communication hole (1410), respectively. In addition, the opening/closing rod (1521) selectively closes the control communication hole (1410) at the other end as the opening/closing end (1522) is pressurized by the refrigerant flowing into the elastic flow path (1131) from the suction chamber (1310). The above valve communication path (1420) is formed on the surface of the valve plate (1400) on the gasket (1600) side, and as the gasket (1600) is seated on the valve plate (1400), it is formed between the gasket (1600) and the valve plate (1400).

Hereinafter, with reference to FIGS. 2 and 3, the operation of the CS valve (1500) according to the operating state of the swash plate compressor (100) according to the present invention will be described.

During the initial operation of the swash plate compressor (1000) according to the present invention, the pressure difference between the refrigerant existing in the swash plate chamber (1210) and the pressure of the suction chamber (1310) is maintained at a relatively low state. Accordingly, in this case, since the force that the elastic member (1530) exerts on the opening/closing end (1522) is greater than the force that the refrigerant flowing into the elastic path (1131) from the swash plate chamber (1210) exerts on the opening/closing end (1522), as illustrated in FIG. 2, the opening/closing member (1520) maintains a state in which it has moved as much as possible toward the swash plate chamber (1210). And the other end of the opening/closing bar (1521) does not close the gasket communication hole (1610) and the control communication hole (1410), but maintains the gasket communication hole (1610) and the control communication hole (1410) in an open state. This is to enable the refrigerant accumulated inside the swash plate chamber (1210) to be quickly discharged into the suction chamber (1310) when the swash plate type compressor (1000) is initially operated, so that the inclination angle of the swash plate (1240) can be quickly increased. The refrigerant existing in the swash plate chamber (1210) flows into the suction chamber (1310) through the flow path inside the drive shaft (1220), the block communication chamber (1150), the valve communication flow path (1420), and the control communication hole (1410).

However, if the amount of discharged refrigerant is maintained at a constant level even when the rotation speed of the above-mentioned swash plate (1240) is sufficiently increased, or if the cooling load is reduced and the amount of refrigerant discharged through the swash plate compressor (1000) must be reduced, the amount of refrigerant recovered from the swash plate chamber (1210) to the suction chamber (1310) needs to be reduced in response to the air conditioning system of the vehicle. In a state where the rotation speed of the above-mentioned swash plate (1240) is sufficiently increased, the refrigerant pressure difference between the swash plate chamber (1210) and the suction chamber (1310) is maintained at a high level compared to the initial operation of the swash plate type compressor (1000). In this case, the force that the refrigerant flowing into the elastic path (1131) from the swash plate room (1210) exerts on the opening/closing end (1522) is greater than the force that the elastic member (1530) exerts on the opening/closing end (1522), so that, as shown in FIG. 3, the opening/closing member (1520) moves toward the control communication hole (1410). Then, the other end of the opening/closing rod (1521) closes the control communication hole (1410). Therefore, the amount of refrigerant flowing into the suction chamber (1310) from the swash plate room (1210) decreases.

According to the swash plate compressor (1000) according to the present invention, when the refrigerant in the swash plate chamber (1210) is quickly recovered into the suction chamber (1310), thereby preventing initial operation delay, and when the rotation speed of the swash plate (1240) is sufficiently increased, the recovery of the refrigerant from the swash plate chamber (1210) into the suction chamber (1310) is reduced, thereby allowing the amount of refrigerant discharged according to the operating state of the swash plate compressor (1000) to be optimally maintained. Accordingly, according to the swash plate compressor (1000) according to the present invention, the compression efficiency of the refrigerant can be improved, and the fuel efficiency of a vehicle in which the swash plate compressor (1000) according to the present invention is used can also be improved.

Meanwhile, referring to FIGS. 2 and 3, the control communication hole (1410) is formed with a shape smaller than the diameter of the other end of the opening/closing member (1520). Accordingly, the opening/closing member (1520) operates so that when one end is pressurized by the refrigerant flowing into the valve pressurization path (1420) from the swash plate chamber (1210), the other end completely closes the control communication hole (1410).

At this time, a constant communication hole (1430) is additionally formed in the valve plate (1400). The constant communication hole (1430) is formed to communicate the block communication room (1150) and the suction room (1310) with each other, so that the refrigerant flowing into the block communication room (1150) flows into the suction room (1310). Unlike the control communication hole (1410), the constant communication hole (1430) is not closed by the CS valve (1500), so that even if the control communication hole (1410) is closed by the CS valve (1500), the refrigerant existing in the swash plate room (1210) is constantly introduced into the suction room (1310) through the constant communication hole (1430). Therefore, in this case, even when the rotation speed of the swash plate (1240) is at its maximum, a minimum amount of refrigerant can be recovered from the swash plate chamber (1210) to the suction chamber (1310).

Hereinafter, a swash plate type compressor (2000) according to a second embodiment of the present invention will be described in detail with reference to FIGS. 5 to 8. At this time, only the parts that are different from the first embodiment of the present invention will be described.

Referring to FIGS. 5 to 8, a swash plate compressor (2000) according to a second embodiment of the present invention has a changed structure of a valve plate (1401) compared to the first embodiment of the present invention. That is, a cylinder block (1100), a swash plate housing (1200), an inlet/outlet housing (1300), a CS valve (1500), and a gasket (1600) of a swash plate compressor (2000) according to the second embodiment of the present invention are formed with the same structure and shape as the cylinder block (1100), a swash plate housing (1200), an inlet/outlet housing (1300), a CS valve (1500), and a gasket (1600) of a swash plate compressor (1000) according to the first embodiment of the present invention.

The above valve plate (1401) is also formed with a control communication hole (1411) and a valve communication path (1421). Since the valve communication path (1421) has the same structure as the valve communication path (1420) in the first embodiment, a description thereof will be omitted. On the other hand, the valve plate (1401) does not have a permanent communication hole (1430) as in the first embodiment, and the control communication hole (1411) is formed in the shape of a slot that is longer than the diameter of the other end of the opening/closing member (1520). More specifically, referring to FIG. 8, the control communication hole (1411) may be formed in the shape of a slot that is smaller than the diameter of the other end of the opening/closing member (1520) in width but larger than the diameter of the other end of the opening/closing member (1520). Accordingly, the opening/closing member (1520) operates so that one end is pressurized by the refrigerant flowing into the valve pressurization passage (1130) from the swash plate room (1210), and the other end closes only a part, not the entire, of the control communication hole (1411).

Here, since the opening/closing member (1520) closes only a portion of the control communication hole (1411), a portion of the control communication hole (1411) that is not closed by the opening/closing member (1520) remains in communication with the valve communication path (1521). Accordingly, the refrigerant flowing into the block communication room (1150) is constantly flowing into the suction chamber (1310) through the unclosed portion of the valve communication path (1521) and the control communication hole (1411). Accordingly, in this case, even when the rotation speed of the swash plate (1240) is at its maximum, a minimum amount of refrigerant can be recovered from the swash plate room (1210) to the suction chamber (1310).

Meanwhile, in the first and second embodiments of the present invention, the valve communication path (1420, 1421) was described as being formed in the valve plate (1400, 1401), but this is only an example, and the valve communication path (1420, 1421) may be formed in the cylinder block (1100) rather than the valve plate (1400, 1401).

In addition, in the first and second embodiments of the present invention, it was described that the refrigerant is introduced into the block communication room (1150) through a passage formed inside the drive shaft (1220), but this is only an example, and the refrigerant introduced into the block communication room (1150) may be supplied through other passages other than the passage formed inside the drive shaft (1220).

1000,2000: Swash plate compressor 1100: Cylinder block
1200: Sappan Housing 1300: Entry/Exit Housing
1400,1401: Valve plate 1500: CS valve
1600 : Gasket

Claims (9)

A cylinder block having a cylinder bore formed inside and a piston reciprocally installed in the cylinder bore;
A swash plate housing installed on one side of the cylinder block, having a swash plate room formed inside, a drive shaft, a lug plate coupled to the drive shaft and rotating, and a swash plate coupled to the lug plate and having an inclination adjusted with respect to the drive shaft and causing the piston to reciprocate.
An inlet/outlet housing installed on the other side of the cylinder block and having a suction chamber in which refrigerant is sucked into the cylinder bore and a discharge chamber in which refrigerant is discharged from the cylinder bore;
A valve plate interposed between the cylinder block and the intake/exit housing and having a control communication hole formed between the swash plate room and the suction chamber; and
It includes a CS valve that is installed in a valve pressurization path formed in the cylinder block to communicate the above-mentioned swash plate room and the control communication hole, and controls the area of the control communication hole as it is pressurized by the refrigerant present in the above-mentioned swash plate room, thereby controlling the amount of refrigerant discharged through the control communication hole.
The above CS valve,
A hollow fixing member arranged so that the outer surface is fixedly joined to the inner wall of the valve pressurization passage,
It includes an opening/closing member that is installed through the fixed member so as to be movable with respect to the fixed member, has one end facing the swash plate room and the other end facing the control communication hole, and as one end is pressurized by the refrigerant flowing into the valve pressurization path from the swash plate room, the other end moves in a direction that reduces the area of the control communication hole.
The above opening/closing member includes an opening/closing rod movably arranged inside the above fixed member, and an opening/closing end connected to one end of the opening/closing rod on the side of the sash chamber and having a diameter larger than that of the opening/closing rod.
It further includes an elastic member that is arranged between the fixed member and the opening/closing member and presses the opening/closing member toward the sash chamber.
A swash plate type compressor further comprising a stop ring that is coupled to the outer surface of the other end of the above-mentioned opening/closing member and selectively seated on the surface of the above-mentioned control communication hole side of the above-mentioned fixed member to prevent the above-mentioned opening/closing member from being separated from the above-mentioned fixed member toward the above-mentioned plate room by the above-mentioned elastic member. delete In claim 1,
The above control communication hole is formed with a shape smaller than the diameter of the other end of the opening/closing member,
The above-mentioned opening/closing member operates so that one end is pressurized by the refrigerant flowing into the valve pressurization passage from the above-mentioned swash plate, and the other end closes the entire control communication hole.
The above cylinder block is arranged in parallel with the valve pressurization path, and a block communication room is formed through which refrigerant flows from the swash plate room.
The above valve plate is a swash plate type compressor in which a permanent communication hole is formed that connects the block communication room and the suction room. In claim 1,
The above control communication hole is formed in a slot shape longer than the diameter of the other end of the opening/closing member,
The above-mentioned opening/closing member is a swash plate type compressor that operates so that one end is pressurized by refrigerant flowing into the valve pressurization passage from the swash plate room, and the other end closes a portion of the control communication hole. In claim 1,
The above valve pressurization oil is,
An elastic path in which one end of the above opening/closing member is arranged,
It is arranged between the elastic path and the control communication hole, and includes a fixed path having an inner diameter larger than that of the elastic path and in which the fixed member is arranged.
The above-mentioned opening and closing member is a swash plate type compressor formed so that one end is in contact with the inner wall of the elastic passage. delete delete In claim 1,
The above cylinder block is arranged in parallel with the valve pressurization path, and a block communication room is formed through which refrigerant flows from the swash plate room.
The above valve plate is a swash plate type compressor in which a valve communication passage is formed between the block communication room and the control communication hole and the valve pressurization passage and the control communication hole.
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