JPH07317654A - Swash plate compressor - Google Patents

Abstract

PURPOSE:To improve the assembling, manufacture, and installation efficiency of a device while maintaining excellent discharge performance. CONSTITUTION:A cylinder head partitioned into an intake chamber 3b and a discharge chamber 3c of a fluid by the first bulkhead 3a inside is fitted at one end of a main body casing 1 in this swash plate compressor. The intake chamber 3b is partitioned into the first intake chamber 13b and the second intake chamber 23b by the second bulkhead 13a, a fluid intake port 11 is connected to the first intake chamber 13b, and the first fluid passage 12a communicated with a swash plate chamber 5 is connected to the first intake chamber 13b. The second fluid passage 12b communicated with the swash plate chamber 5 is connected to the second intake chamber 23b, and an intake port 23d capable of being communicated with a cylinder bore 6b is provided on the second intake chamber 23b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swash plate compressor used for an air conditioner for vehicles, and more particularly to a swash plate compressor having a so-called double-headed piston.

[0002]

2. Description of the Related Art Conventionally, as a double-headed piston type swash plate compressor, for example, one shown in FIG. 3 has been known. In FIG. 3, reference numeral 31 denotes a main body casing. A front housing 32 and a cylinder head 33 are connected to both ends of the main body casing 31. A swash plate chamber 35 for accommodating the swash plate 34 and a cylinder bore 36 are formed in the main body casing 31.

A drive shaft 37 is inserted through the swash plate 34. The drive shaft 37 is supported on the body casing 31 side via a bearing 38. A piston 40 is connected to the swash plate 34 via a shoe 39. The piston 40 extends into the left and right cylinder bores 36a and 36b. The main body casing 31 is provided with a fluid suction port 41 for sucking a fluid (for example, a refrigerant) from the outside, and the sucked fluid is further sucked into the cylinder bore 36.

The inside of the cylinder head 33 is divided into a suction chamber 44 and a discharge chamber 45 by a partition wall 33a. The suction chamber 44 and the cylinder bore 36b are communicated with each other through a suction port 44a. The discharge chamber 45 is communicated with the cylinder bore 36b through a discharge port 45a having an opening / closing valve 45b.

Further, the inside of the front housing 32 connected to the other end of the main body casing 31 is divided into a suction chamber 42 and a discharge chamber 43 by a partition wall 32a. The suction chamber 42 and the cylinder bore 36a communicate with each other through a suction port 42a. The discharge chamber 43 communicates with the cylinder bore 36a through a discharge port 43a having an opening / closing valve 43b.

The swash plate chamber 35 and the suction chambers 42 and 44 are communicated with each other via fluid flow passages 46a and 46b.

In the above device, the drive shaft 37
When the swash plate 34 is rotated along with the rotation of the piston, the piston 40 connected through the shoe 39 moves the cylinder bore 36a,
Reciprocates 36b. The fluid that has flowed in from the fluid suction port 41 flows into the suction chambers 42 and 44 through the swash plate chamber 35 and the fluid flow passages 46 a and 46 b, and enters the cylinder bore 36.
a, 36b, compressed by the reciprocating movement of the piston 40, and then discharged into the discharge chambers 43, 45.

The fluid that has flowed into the system from the fluid suction port 41 is dispersed in the swash plate chamber 35 in a well-balanced manner and sent to the suction chambers 42 and 44. Therefore, the fluid amount, the fluid temperature, the fluid pressure, etc. before and after the drive shaft 37 in the axial direction are made uniform,
Efficient compression and ejection are performed.

[0009]

However, in the conventional device as described above, the fluid suction port 41 is directly connected to the main body housing 31. Therefore, first, there is a problem that the mechanism of the main body housing 31 itself becomes complicated.

Depending on the installation location of the compressor, a fluid suction hose (not shown) joined to the fluid suction port 41 in the case of installation in the engine room of an automobile or the like.
However, it may be necessary to connect from the axial side of the drive shaft 37. In such a case, the fluid suction port 41 must be extended to a joint position with the fluid suction hose by using a meandering extension pipe or the like. Therefore, there is a problem that the structure of the fluid suction port 41 or its extension pipe becomes complicated, and the installation space of the entire apparatus increases due to the meandering extension pipe.

However, if the connection position of the fluid suction port 41 is simply changed in the axial direction in order to solve the above problem, the amount of fluid dispersed in the cylinder bores located on both sides in the axial direction, Fluid pressure, fluid temperature, etc.
This may result in non-uniformity, inefficient compression and ejection, which may result in increased vibration and noise of the device and reduced ejection performance.

The present invention focuses on the above problems,
Provides a swash plate compressor that maintains the high performance of the device, changes the connection position of the fluid suction port, improves manufacturing and assembly efficiency, and can be easily installed in a limited installation space. The purpose is to do.

[0013]

According to the swash plate type compressor of the present invention for achieving the above object, a swash plate chamber for accommodating a swash plate and a cylinder bore are formed in a main body casing, and a piston connected to the swash plate is connected to the cylinder bore. A swash plate compressor in which a cylinder head, which is reciprocally moved inward, is attached to one end of a main body casing, the inside being defined by a first partition wall into a fluid suction chamber and a discharge chamber arranged around the suction chamber. , The first suction chamber and the second suction chamber are defined by a second partition, and a fluid suction port from the outside is connected to the first suction chamber and the swash plate chamber is connected to the first suction chamber. A first fluid passage communicating with the second suction chamber is connected to the second suction chamber, a second fluid passage communicating with the swash plate chamber is connected to the second suction chamber, and a suction port is provided which is capable of communicating with the cylinder bore by opening and closing a suction valve. It consists of

Further, the first suction chamber and the second suction chamber may communicate with each other through a hole or a groove.

[0015]

In the swash plate type compressor as described above, since the first suction chamber and the second suction chamber are defined by the second partition wall, the fluid suction port connected to the first suction chamber. The fluid that has flowed in from is first sent to the swash plate chamber via the first fluid passage. The fluid flowing into the swash plate chamber is 2
Into two streams, one through the second fluid passage to the second
It flows into the inhalation chamber. The other flows into the suction chamber on the front housing side. Therefore, the amount of fluid dispersed in the axial direction of the drive shaft, the fluid pressure, the fluid temperature, etc. are made uniform,
The compression is efficiently performed in both cylinder bores, and the compression and discharge performance of the device is secured. Since the fluid suction port is provided in the cylinder head instead of the main body housing, the hose extending in the axial direction can be directly and efficiently connected in a narrow space.

Further, when the fluid flowing into the swash plate chamber is branched into the cylinder head side and the front housing side, it may be difficult to flow into the second suction chamber due to the directivity of the flow so far. By communicating the first suction chamber and the second suction chamber with a hole or a groove, a small amount of fluid directly flows from the first suction chamber into the second suction chamber to supplement the suction amount into the second suction chamber and branch. It is also possible to ensure a uniform amount.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the swash plate type compressor of the present invention will be described below with reference to the drawings. 1 and 2 show
1 illustrates a swash plate compressor according to an embodiment of the present invention. In the figure, 1 indicates a main body casing. A front casing 2 is connected to one end of the body casing 1. A cylinder head 3 is connected to the other end of the main body casing 1. A swash plate chamber 5 for accommodating the swash plate 4 and a cylinder bore 6 are formed in the main body casing 1.

A drive shaft 7 is inserted through the swash plate 4.
The drive shaft 7 is supported on the body casing 1 side via a bearing 1a. A piston 9 is connected to the swash plate 4 via a shoe 8 having a spherical shape. The piston 9 extends into the left and right cylinder bores 6a, 6b.

A wall 2a is provided inside the front casing 2 connected to one end of the main body casing 1, and the wall 2a defines a suction chamber 2b and a discharge chamber 2c. The suction chamber 2b communicates with the swash plate chamber 5 via the passage 10. Further, the suction chamber 2b communicates with the cylinder bore 6a through the suction hole 2d. On the other hand, the discharge chamber 2
c is communicated with the cylinder bore 6a through a discharge hole 2f having an opening / closing valve 2e.

As shown in FIG. 2, the inside of the cylinder head 3 connected to the other end of the main body casing 1 is divided into a suction chamber 3b and a discharge chamber 3c by a first partition wall 3a. Further, the inside of the suction chamber 3b is divided into a first suction chamber 13b and a second suction chamber 23b by the second partition wall 13a.

A fluid suction port 11 for sucking fluid from the outside is connected to the first suction chamber 13b. Also,
A first fluid passage 12a is connected to the first suction chamber 13b, and the first suction chamber 1 is connected via the first fluid passage 12a.
3b and the swash plate chamber 5 communicate with each other.

The second fluid passage 1 is provided in the second suction chamber 23b.
2b is connected. The second suction chamber 23b and the swash plate chamber 5 communicate with each other via the second fluid passage 12b. In addition, the second suction chamber 23b is provided with a suction hole 23d having a suction valve 25 that can be opened and closed, and by opening and closing the suction valve 25, the second suction chamber 23b can communicate with the cylinder bore 6b. The first suction chamber 13b and the second suction chamber 23
It is partially communicated with b through the hole 20.

The discharge chamber 3c is provided with a discharge hole 3f having an opening / closing valve 3e, and the cylinder bore 6b and the discharge chamber 3c are communicated with each other through the discharge hole 3f. Further, the discharge chamber 3c is connected to a fluid discharge port 15 that sends the discharged fluid to the outside.

In the apparatus of this embodiment, when power from a drive source (not shown) such as an automobile engine is transmitted to the drive shaft 7, the swash plate 4 is rotated along with the rotation of the drive shaft 7. It Due to the rotation of the swash plate 4, the piston 9 connected through the sliding contact with the shoe 8 causes the cylinder bore 6a,
6b is reciprocated, the fluid is compressed, and the discharge chamber 2
c, 3c is discharged.

The fluid sucked from the outside through the fluid suction port 11 is first sucked into the first suction chamber 13b. Since the second suction chamber 23b and the first suction chamber 13b are partitioned by the second partition wall 13a, most of the fluid sucked from the fluid suction port 11 has the first fluid passage 12a. Is sent into the swash plate chamber 5 via.

The swash plate chamber 5 is connected to the passage 10 communicating with the suction chamber 2b of the front casing 2 and the second fluid passage 12b communicating with the second suction chamber 23b of the cylinder head 3. The fluid sucked into the swash plate chamber 5 is
The suction chamber 2b passes through the passage 10 and the second fluid passage 12b.
And is sent to the second suction chamber 23b.

That is, most of the fluid sucked from the fluid suction port 11 is sucked into the swash plate chamber 5 and then branched in the axial direction of the drive shaft 7 (left and right in FIG. 1). Therefore, the amount of fluid sent to the suction chamber 2b and the second suction chamber 23b, the fluid pressure, and the fluid temperature are substantially equalized.

Further, since the fluid suction port 11 is connected to the cylinder head 3, the structure and manufacturing of the main body housing 1 is simplified, and a hose (not shown) connected to the port 11 is shown in FIG. The hose is easily connected directly to the port 11 even if it extends axially from the right side of the.

In the present embodiment, the second suction chamber 2
Since 3b is provided in the cylinder head 3, the fluid once sucked into the swash plate chamber 5 passes through the second fluid passage 12b in the direction opposite to the flow of the fluid from the first fluid passage 12a, and 2 is sucked into the suction chamber 23b. At this time, due to the directivity of the fluid introduced into the swash plate chamber 5, a sufficient amount of the target fluid (that is, about half the total amount of the inhaled fluid) is supplied into the second suction chamber 23b. It may not be done.

However, the first suction chamber 13b and the second suction chamber 2
Since the second partition wall 13a defining 3b is provided with the hole 20, part of the fluid sucked from the fluid suction port 11 is sent from the hole 20 into the second suction chamber 23b. As a result, a sufficient amount of fluid is supplied also into the second suction chamber 23b, and the left and right cylinder bores 6a, 6b of the suction fluid are supplied.
The homogenization of the branches to b is achieved more reliably.

The first suction chamber 13b and the second suction chamber 23
The communication with b is not limited to the hole 20, but the second
It is also possible to engrave a groove in the partition wall 13a.

[0032]

As described above, according to the swash plate type compressor of the present invention, the suction chamber of the cylinder head is divided into the first suction chamber and the second suction chamber to suck the fluid into the cylinder head. It is possible to adopt a configuration in which the use port is connected, and it is possible to secure excellent compression and discharge performance of the device.

Further, by connecting the fluid suction port to the cylinder head, the main body housing can be simplified, and the external hose can be easily connected to reduce the installation space of the entire compressor. .

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a swash plate compressor according to an embodiment of the present invention.

2 is an enlarged cross-sectional view of the device of FIG. 1 taken along the line II-II.

FIG. 3 is a cross-sectional view of a conventional swash plate compressor.

[Explanation of symbols]

 1 main casing 1a bearing 2 front casing 2a wall 2b, 3b suction chamber 2c, 3c discharge chamber 2d, 23d suction hole 2e, 3e opening / closing valve 2f, 3f discharge hole 3 cylinder head 3a first partition wall 4 swash plate 5 swash plate chamber 6 , 6a, 6b Cylinder bore 7 Drive shaft 8 Shoe 9 Piston 10 Passage 11 Fluid suction port 12a First fluid passage 12b Second fluid passage 13a Second partition wall 13b First suction chamber 15 Fluid discharge port 20 Hole 23b 2 Suction chamber 25 Suction valve

Claims (2)

[Claims] 1. A swash plate chamber for accommodating a swash plate and a cylinder bore are formed in a main body casing, and a piston connected to the swash plate is reciprocated in the cylinder bore. In the swash plate compressor in which a cylinder head defined by a fluid suction chamber and a fluid discharge chamber is attached, the suction chamber is defined by a second partition wall into a first suction chamber and a second suction chamber, A port for fluid intake from the outside is connected to the first suction chamber, a first fluid passage communicating with the swash plate chamber is connected, and a second suction chamber communicating with the swash plate chamber is connected to the second suction chamber. A swash plate type compressor, characterized in that two fluid passages are connected to each other and an intake port is provided which can communicate with the cylinder bore by opening and closing an intake valve. 2. The swash plate compressor according to claim 1, wherein the first suction chamber and the second suction chamber communicate with each other through a hole or a groove.