JPH10220346A - Swash plate compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a swash plate compressor by which an appropriate amount of gas sucked from an intake opening into a swash plate chamber can be sucked into a plurality of suction passages, gas can be appropriately supplied to suction chambers formed in front and rear housings, and compression efficiency can be improved. SOLUTION: In this compressor, a swash plate 34 is stored in a swash plate chamber 21 formed in a center part between front and rear side cylinder blocks 11, 12, and fitted and fixed on a driving shaft 18. A suction passage 22 is formed in the rear side cylinder block 12. First suction passages 301, 311 through which gas is introduced from the swash plate chamber 21 to suction chambers 24, 25 formed in a front housing 15 and a rear housing 16, are formed in the cylinder blocks 11, 12. A first deflection plate 41 by which gas sucked from an intake opening 122 into the swash plate chamber 21 is deflected to a front side, is arranged in the swash plate chamber 21, thereby a gas suction amount into the first suction passages 301, 311 is equalized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-headed swash plate type compressor used in, for example, a vehicle air conditioner. More specifically, the gas sucked into the swash plate chamber from the suction port provided in the cylinder block of the swash plate compressor can be smoothly guided to the front and rear suction chambers through a plurality of pairs of front and rear suction passages. The present invention relates to a gas suction structure.

[0002]

2. Description of the Related Art In general, in a double head piston type swash plate type compressor, front and rear housings which define a suction chamber and a discharge chamber are fixedly joined to both front and rear end surfaces of a cylinder block having a plurality of cylinder bores. . The swash plate chamber formed in the center of the cylinder block accommodates a swash plate which is pivotally rotated by a drive shaft. On both front and rear sides of the swash plate, a double-headed piston accommodated in the cylinder bore is moored via shoes. ing. The cylinder block is provided with a suction port for introducing gas into the swash plate chamber,
A plurality of pairs of suction passages for guiding gas in the swash plate chamber to the front and rear suction chambers are provided. Then, when the double-headed piston is reciprocated by the rotation of the swash plate,
Gas is sucked from the suction chamber into a compression chamber in the cylinder bore, and the gas compressed in the compression chamber is discharged to the discharge chamber.

As shown in FIG. 6, a pair of cylinder blocks 11 and 12 are provided on the front and rear sides so as to form a swash plate chamber 21 in the center, and the cylinder blocks 11 and 12 are inclined from the external refrigerant circuit to the cylinder block 12 on the rear side. A suction port 122 for sucking gas into the plate chamber 21 is provided. Also, FIG.
As shown in FIG. 7, a suction passage 30 for introducing gas from the swash plate chamber 21 to suction chambers 24, 25 formed in the front and rear housings 15, 16 is provided in the cylinder blocks 11, 12.
1, 302, 303, 311, 312, and 313 are provided, respectively. Reference numeral 17 denotes a tightening bolt for the cylinder blocks 11 and 12 and the housings 15 and 16,
Reference numeral 18 denotes a drive shaft, reference numeral 22 denotes a double-headed piston, and reference numeral 34 denotes a swash plate which is fitted and fixed to the drive shaft 18 and reciprocates the piston 22.

[0004]

However, in the gas suction structure of the swash plate type compressor, when the gas is sucked from the suction port 122 into the swash plate chamber 21, each pair of the suction passages 30 is provided.
1, 302, 303, 311, 312, and 313 have a problem in that the amount of gas sucked into them is difficult to be uniform. That is, as described above, since the suction port 122 is provided so as to be displaced rearward from the center of the swash plate chamber 21, when the outer peripheral surface of the swash plate 34 is located at a position facing the suction port 122, gas is temporarily supplied. The amount of introduction into the swash plate chamber 21 is limited. Swash plate 3
6, the gas introduced from the suction port 122 into the swash plate chamber 21 is sucked into the suction passages 311, 312, 313 on the rear side as shown by arrows in FIG. However, the swash plate 34 is difficult to reach the front side. For this reason, the front-side suction passages 301 to 3
There is a problem that a difference occurs in the gas suction amount between the intake passages 03 and the rear suction passages 311 to 313 to lower the compression efficiency.

Further, as shown in FIG.
Is formed so as to face the drive shaft 18, the gas sucked into the swash plate chamber 21 is driven by the drive shaft 1.
Go to 8. At this time, the gas flow colliding with the body of the left and right double-headed pistons 22 is easily sucked into the suction passage 301 (311) closest to the suction port 122 as shown by the arrow in FIG. 312), 303 (31
3), the flow rate of the gas to the rear intake passages 31 decreases.
There is a problem that the compression efficiency is reduced due to a difference in the gas suction amount of 1 to 313.

[0006] Even in a single-headed piston type swash plate type compressor in which a piston is provided only on one side of the swash plate, there is a difference in the amount of gas sucked into a plurality of suction passages, so that the compression efficiency is reduced. was there.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems in the prior art and to allow a suitable amount of gas to be sucked from a suction port into a swash plate chamber into a plurality of suction passages. It is an object of the present invention to provide a swash plate type compressor capable of appropriately supplying the above gas and improving the compression efficiency.

Another object of the present invention is to solve the problems in the prior art, and to allow a plurality of pairs of front and rear suction passages to suck an appropriate amount of gas sucked from a suction port into a swash plate chamber. It is an object of the present invention to provide a double-headed piston type swash plate compressor capable of appropriately supplying gas to suction chambers formed in front and rear housings and improving compression efficiency.

[0009]

According to a first aspect of the present invention, a housing defining a suction chamber and a discharge chamber is joined and fixed to an end face of a cylinder block having a plurality of cylinder bores. A swash plate rotated by a drive shaft, a piston housed in the cylinder bore is connected to the swash plate, and the swash plate chamber is provided with a suction port for introducing gas into the swash plate chamber, and the cylinder block A plurality of suction passages for guiding the gas in the swash plate chamber to the suction chamber are provided, and the piston is reciprocated by the rotational movement of the swash plate to suck the gas from the suction chamber into the compression chamber in the cylinder bore. In the swash plate type compressor configured to discharge the gas compressed in the compression chamber to the discharge chamber, the swash plate chamber changes a flow of gas sucked into the swash plate chamber from the suction port. It is provided deflection member for homogenizing the gas flow inhaled into the suction passage.

According to a second aspect of the present invention, in the first aspect, the suction port is formed so as to be directed to the drive shaft, and the deflecting member divides a part of the gas in a circumferential direction in the swash plate chamber. ing.

According to a third aspect of the present invention, in any one of the first and second aspects, the cross-sectional area of the suction passage is set larger as the distance from the suction port increases. According to a fourth aspect of the present invention, in the second aspect, the deflection member is an arc-shaped deflection plate provided on a cylinder block.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, one of the plurality of suction paths is provided corresponding to the suction port, and the deflecting member is connected to the suction port. Is provided at a position that suppresses the gas suction amount of the suction passage closest to the intake passage.

According to a sixth aspect of the present invention, in the fifth aspect, the suction passage also serves as an insertion hole for a tightening bolt for tightening the cylinder block and the housing, and the deflecting member covers an outer peripheral side of the tightening bolt. As in the cylinder block.

According to a seventh aspect of the present invention, in the sixth aspect, the deflecting plate is opposed to the first deflecting plate having an arc shape for deflecting the gas from the suction port with the clamping bolt interposed therebetween. And an arc-shaped second deflecting plate for suppressing the gas reflected by the outer peripheral surface of the piston from flowing into the suction passage closest to the suction port.

According to an eighth aspect of the present invention, the front and rear housings which define a suction chamber and a discharge chamber are formed on both front and rear end surfaces of a cylinder block having a plurality of cylinder bores. A swash plate chamber, which is joined and fixed, and is rotated by a drive shaft, is housed in a swash plate chamber formed in the center of the cylinder block, and a double-headed piston housed in the cylinder bore is moored on both front and rear side surfaces of the swash plate via shoes. The cylinder block has a suction port for introducing gas into the swash plate chamber, and a plurality of pairs of suction passages for guiding gas in the swash plate chamber to the front and rear suction chambers. It is a plate compressor.

According to a ninth aspect of the present invention, in the ninth aspect, the suction port is provided at a position displaced in the axial direction from the center of the swash plate chamber, and the deflecting member is configured to transfer gas from the suction port to a front side of the swash plate chamber. It is provided so as to be diverted to the rear side.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. As shown in FIG. 1, a front housing 15 and a rear housing 16 are joined to front and rear end surfaces of a pair of front and rear (left and right) cylinder blocks 11 and 12 that are opposed to each other via valve plates 13 and 14. ing. The cylinder blocks 11 and 12, the valve plates 13 and 14, the front housing 15, and the rear housing 16 are joined and fixed to each other by a plurality of tightening bolts 17.

A drive shaft 18 is rotatably supported in the center holes of the cylinder blocks 11 and 12 via a pair of front and rear radial bearings 19 and 20. A swash plate chamber 21 is formed at the joint between the cylinder blocks 11 and 12, and cylinder bores 111 and 121 are formed at a plurality of locations around the drive shaft 18 at predetermined intervals as shown in FIG. Refrigerant gas is drawn into the swash plate chamber 21 from a suction port 122 provided on the outer periphery of the cylinder block 12. Each cylinder bore 111, 1
As shown in FIG. 3, a double-headed piston 22 is accommodated in 21 so as to be able to reciprocate in the front-rear direction, and a compression chamber 23 is formed between the end face of the double-headed piston 22 and the valve plates 13, 14.

As shown in FIG. 1, the front and rear housings 15 and 16 have suction chambers 24 and 25 near the outer periphery.
Are formed near the center, respectively. The valve plates 13 and 14 are shown in FIGS.
As shown in FIG.
29 are provided. First to third suction passages 301, 302, 303 are formed between the cylinder bores 111 of the cylinder block 11 on the front side so as to extend in the axial direction. Cylinder bore 12 of rear cylinder block 12
The first to third suction passages 311, 312, 313
Are formed to extend in the axial direction. The swash plate chamber 21 includes first to third suction passages 301, 302, 30 on the front side.
3 communicates with the suction chamber 24 on the front side. The swash plate chamber 21 is communicated with the rear suction chamber 25 through first to third rear suction passages 311, 312 and 313. The first to third suction passages 301, 302, and 303 on the front side and the first to third suction passages on the rear side.
The third suction passages 311, 312 and 313 are axially aligned with each other. First to third pairs formed before and after
Suction passages 301 (311), 302 (312), 30
3 (313), the tightening bolt 17 is inserted. That is, the suction passage also serves as an insertion hole for the fastening bolt 17.

The valve plates 13 and 14 are provided in FIG.
As shown in FIG. 3, the discharge valve mechanism 3 corresponds to each compression chamber 23.
2, 32 are provided. The discharge chambers 26 and 27 are connected to an external refrigerant circuit by discharge passages 331, muffler chambers 332 and discharge ports 123 formed in the valve plates 13 and 14 and the cylinder blocks 11 and 12.

The swash plate chamber 21 is provided with the drive shaft 18.
A swash plate 34 fitted and fixed to the swash plate 34 is accommodated, and the double-headed piston 22 is moored to the swash plate 34 via shoes 35 and 36. The boss of the swash plate 34 and the cylinder block 11,
Thrust bearings 37 and 38 are interposed between the swash plate chamber 21 and the side wall forming the swash plate chamber 21. When the drive shaft 18 is rotated, the swash plate 34 swings and rotates, and the double-headed piston 22 reciprocates in the cylinder bores 111 and 121 in the front-rear direction, thereby performing a compression operation.

Next, a structure for sucking gas into the swash plate chamber 21, which is a main part of the present invention, will be described. As shown in FIG.
The suction port 122 is provided in the cylinder block 12 on the rear side, and is displaced by a predetermined distance from the axial center of the swash plate chamber 21 to the rear side. Also, as shown in FIG.
The opening is provided between the double-headed pistons 22 (between the cylinder bores 111 and 112 when viewed from the axial direction), and is provided so as to be directed to the drive shaft 18. As shown in FIG. 4, a plurality of pairs of first to third suction passages 301 to 303, 311 to 31 are provided.
3, a pair of first suction passages 301 and 311 are provided corresponding to the suction port 122. That is, the first suction passage 311 on the rear side is the suction passage closest to the suction port 122.

The cylinder block 12 includes the block 1
The first and second deflecting plates 4 as deflecting members cover the opening of the first suction passage 311 provided on the swash plate chamber 21 side.
1, 42 are provided integrally. Deflection members 41 and 42
1 extends in the axial direction to a position facing the suction port 122 as shown in FIG. The first deflecting plate 41 is formed in an arc shape so as to cover the outer periphery of the tightening bolt 17 as shown in FIG. 4, and the gas sucked from the suction port 122 into the swash plate chamber 21 is inclined as shown by an arrow in FIG. It is guided to the front side of the plate room 21.
The first deflecting plate 41 guides the gas to the second suction passage 312 and the third suction passage 313 along the inner peripheral wall surface of the swash plate chamber 21 as shown in FIG. Second deflection plate 42
Is for suppressing the amount of gas reflected by the outer peripheral surface of the piston 22 into the first suction passage 311 on the rear side.

The first deflecting plate 41 as a deflecting member is present between the opening of the suction port 122 and the opening of the suction passage 311 closest to the suction port 122 when viewed from the axial direction.
It is provided so as to prevent the refrigerant gas from 22 from flowing directly into the suction passage 311 and to divide the refrigerant gas in the axial direction and the circumferential direction. In addition, the second deflection member
The deflection plate 42 exists between the opening of the suction passage 311 and the peripheral surface of the piston 22 when viewed from the axial direction, and the refrigerant gas flowing from the suction port 122 and deflected by the adjacent piston 22 is transferred to the suction passage 311. It is provided to suppress inflow.

Next, the operation of the swash plate type compressor constructed as described above will be described. Now, when the swash plate 34 is rotated by the rotation of the drive shaft 18, each double-headed piston 22 reciprocates in the cylinder bores 111 and 121 in the front-rear direction via the shoes 35 and 36. The refrigerant gas sucked into the swash plate chamber 21 from the external refrigerant circuit and the suction port 122 by the reciprocating motion of the double-headed piston 22 collides with the first deflecting plate 41,
As shown by the arrow in FIG.
As shown by arrows in FIG. 4, the fluid flows along the inner peripheral surface of the swash plate chamber 21 to the bottom of the swash plate chamber 21. Then, from the swash plate chamber 21 to the first to third front side formed in the cylinder block 11.
Through the suction passages 301, 302, 303. Also, first to third suction passages 311 and 312 formed in the rear cylinder block 12 are formed.
313 is led to the rear suction chamber 25. The refrigerant gas in the suction chambers 24, 25 is supplied to the valve plates 13, 1
Suction valve mechanisms 29 provided in the cylinder 4 are sucked into the compression chamber 23 in the cylinder bore. The compressed gas is discharged from the discharge valve mechanisms 32, 32 to the discharge chambers 26, 27. Further, the refrigerant gas discharged into the discharge chambers 26 and 27 is pressure-fed to the external refrigerant circuit from the discharge port 123 via the discharge passage 331 and the muffler chamber 332, and is sent to, for example, an evaporator of a vehicle air conditioner, thereby controlling the indoor air conditioning. To be served.

Next, the operation and effect obtained by the configuration of the above embodiment will be described. In the above embodiment, the suction port 122 is formed in the rear cylinder block 12 so as to be displaced in the axial direction (rear side) from the center of the swash plate chamber 21 and to direct the drive shaft 18. An arc-shaped first deflecting plate 41 is provided on the rear side wall surface of each of the first and second suction passages 311 in proximity to the first suction passage 311.

Therefore, a part of the gas sucked into the swash plate chamber 21 from the suction port 122 is deflected to the front side, and
The first to third suction passages 301 to 30 on the front side
The gas supply to the front and rear sides of the swash plate chamber 21 can be equalized by compensating for the shortage of the gas flow to the swash plate chamber 21.

The gas that has not flowed to the front side of the swash plate chamber 21 is divided in two directions along the inner peripheral surface of the swash plate chamber 21 by the first deflecting plate 41 as shown in FIG. Some of the gas flows from the outer peripheral surface of the piston 22 to the swash plate chamber 21
Through the gap with the inner peripheral surface of the swash plate chamber 21. Therefore, the second suction passage 312 and the third suction passage 3
The supply of gas to the passage 13 is performed smoothly, and the amount of gas suction into both passages is made uniform.

In the above embodiment, since the second deflecting plate 42 is provided corresponding to the first deflecting plate 41, the first suction passage 31
It is possible to make the amount of gas sucked into 1 appropriate. That is, a part of the gas flowing into the gap between the tightening bolt 17 and the two pistons 22 located closest to the bolt hits the outer peripheral surfaces of the pistons 22 and rebounds,
An attempt is made to flow into the first suction passage 311. However, since this gas is repelled by the second deflection plate 42, the first
The suction into the suction passage 311 is suppressed, and the piston 2
After flowing through the gap between the drive shaft 18 and the drive shaft 18, it is sucked into the second and third suction passages 312 and 313. As a result, the amount of gas suction into the first suction passage 311 is appropriately controlled, and the amount of gas suction into the first to third suction passages 311 to 313 is made uniform.

In the above-described embodiment, the first to the first on the front side
Since the cross-sectional areas of the third suction passages 301, 302, and 303 are small, medium, and large, the gas flowing to the front side of the swash plate chamber 21 is uniformly sucked into the first to third suction passages 301, 302, and 303. Is done. If the first to third suction passages 301,
When the cross-sectional areas of the passages 302 and 303 are the same, the third suction passage 303 located at a position far from the suction port 122.
As the amount of gas suctioned increases, the flow path resistance (pressure loss) in the swash plate chamber 21 increases.
Degraded by. In the above embodiment, the first to the rear side
Since the cross-sectional area of the third suction passages 311, 312, and 313 is small, medium, and large, the gas flowing to the rear side of the swash plate chamber 21 is uniformly sucked into the first to third suction passages 311, 312, and 313. Is done.

In the above embodiment, since the first deflecting plate 41 is formed in an arc shape, the gas from the suction port 122 can be smoothly deflected in the circumferential direction of the swash plate chamber 21. The above embodiment can be modified as follows.

In the embodiment shown in FIG. 4, the second deflecting plate 42 is omitted, and the formation range of the first deflecting plate 41 is increased to reduce the amount of gas suction into the first suction passage 311 on the rear side. Control properly.

The suction port 122 is formed only in the cylinder block 11 on the front side. In the embodiment, the first to third suction passages 301 to 3 are used.
03, 311 to 313 are provided, but two pairs or four or more pairs are provided.

In the above-described embodiment, as shown in FIG. 5, the position of the suction port 122 is formed at the center of the swash plate chamber 21 in the axial direction, and only the first deflection plate 41 is provided.

In this embodiment, the gas flowing from the suction port 122 toward the swash plate chamber 21 is equally distributed to the front side and the rear side as shown by arrows in FIG. Is also guided in the circumferential direction of the swash plate chamber 21, so that the amount of gas suction into the first to third suction passages 301 to 303 and 311 to 313 on the front and rear sides can be equalized.

The present invention is applied to a single head piston type swash plate type compressor having a piston on only one side of the swash plate. In this case, the suction amount of gas into each suction passage can be equalized, the compression efficiency can be improved, and the gas diverted to the front side of the swash plate chamber is transferred to the shaft seal chamber of the drive shaft. Since it is positively guided, the cooling and lubrication of the shaft seal mechanism can be reliably performed. (Definition) In this specification, the deflection member is an arc-shaped first member.
In addition to the deflecting plate 41, a flat deflecting plate, a mountain-shaped deflecting plate,
It includes a rod-shaped deflection member or a net-shaped deflection member.

[0037]

The present invention has the following advantages because it is configured as in the appended claims. According to the first to ninth aspects of the present invention, a suitable amount of gas sucked from the suction port into the swash plate chamber can be sucked into the plurality of suction passages, and the gas can be appropriately supplied to the suction chamber formed in the housing, and the compression efficiency can be improved. Can be improved.

According to the second aspect of the present invention, the gas impinging on the deflecting member from the suction port is diverted in the circumferential direction along the inner peripheral surface of the swash plate chamber, thereby optimizing the amount of gas sucked into another suction passage. be able to.

According to the third aspect of the present invention, the amount of gas suction into the plurality of suction passages can be further equalized, the gas can be appropriately supplied to the suction chamber, and the compression efficiency can be further improved. it can.

According to the eighth aspect of the present invention, a suitable amount of gas sucked into the swash plate chamber from the suction port can be sucked into a plurality of pairs of front and rear suction passages, and then into the suction chambers formed in the front and rear housings. Gas can be supplied appropriately, and the compression efficiency can be improved.

According to the ninth aspect of the present invention, the gas sucked into the swash plate chamber from the suction port displaced in the axial direction from the center of the swash plate chamber can be uniformly divided into the front side and the rear side in the swash plate chamber. In addition, the gas can be appropriately supplied to the suction chamber formed in the rear housing, and the compression efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of the swash plate type compressor embodying the present invention, taken along line 1-1 in FIG.

FIG. 2 is a sectional view taken along line 2-2 of FIG. 1 with a cylinder block omitted.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 4;

FIG. 4 is a sectional view taken along line 4-4 in FIG. 1;

FIG. 5 is a sectional view of a main part of another embodiment of the present invention.

FIG. 6 is a partial sectional view showing a conventional swash plate type compressor.

FIG. 7 is a cross-sectional view of a conventional swash plate type compressor.

[Explanation of symbols]

11, 12 ... cylinder block, 13, 14 ... valve plate, 15, 16 ... front and rear housing,
18 ... drive shaft, 21 ... swash plate chamber, 22 ... piston,
23 compression chamber, 24, 25 suction chamber, 26, 27 discharge chamber, 34 swash plate, 41 first deflecting plate as deflecting member,
42 ... second deflecting plate as deflecting member.

Claims (9)

[Claims] A swash plate, which is rotatable by a drive shaft, is housed in a swash plate chamber, and the cylinder bore is mounted on the swash plate. The swash plate chamber is provided with a suction port for introducing gas into the swash plate chamber, and the cylinder block is provided with a plurality of suction passages for guiding gas in the swash plate chamber to the suction chamber. The piston is reciprocated by the rotation of a swash plate to suck gas from the suction chamber into a compression chamber in a cylinder bore, and discharge the gas compressed in the compression chamber to the discharge chamber. In the plate compressor, a deflecting member for changing a flow of gas sucked into the swash plate chamber from the suction port in the swash plate chamber to equalize a flow rate of gas sucked into each of the suction passages is provided. Only the swash plate type compressor. 2. The swash plate compressor according to claim 1, wherein the suction port is formed so as to face the drive shaft, and the deflecting member diverts a part of the gas in a circumferential direction in the swash plate chamber. 3. The swash plate type compressor according to claim 1, wherein a cross-sectional area of the suction passage is set to be larger as a distance from the suction port is larger. 4. The swash plate compressor according to claim 2, wherein said deflecting member is an arc-shaped deflecting plate provided on a cylinder block. 5. The method according to claim 1, wherein:
One of the plurality of suction passages is provided corresponding to the suction port, and the deflecting member is provided at a position for suppressing a gas suction amount of the suction passage closest to the suction port. . 6. The cylinder block according to claim 5, wherein the suction passage also serves as an insertion hole for a tightening bolt for tightening the cylinder block and the housing, and the deflecting member covers the outer peripheral side of the tightening bolt. The swash plate type compressor provided in. 7. The deflecting plate according to claim 6, wherein the deflecting plate faces the first deflecting plate having an arc shape for deflecting the gas from the suction port and a first deflecting plate with a clamping bolt interposed therebetween. A swash plate type compressor including a second arc-shaped deflecting plate for suppressing the reflected gas from flowing into the suction passage closest to the suction port. 8. The method according to claim 1, wherein
The swash plate type compressor has a front and a rear housing, which defines a suction chamber and a discharge chamber, joined and fixed to both front and rear end surfaces of a cylinder block having a plurality of cylinder bores, and a drive shaft is mounted on a swash plate chamber formed in the center of the cylinder block. The swash plate which is rotated by the swash plate is housed, a double-headed piston housed in the cylinder bore is moored on both front and rear side surfaces of the swash plate via shoes, and the cylinder block has a suction port for introducing gas into the swash plate chamber. A swash plate type compressor of a double-headed piston type provided with a plurality of pairs of suction passages for guiding gas in the swash plate chamber to the front and rear suction chambers. 9. The swash plate chamber according to claim 8, wherein the suction port is provided at a position displaced in an axial direction from a center of the swash plate chamber, and the deflecting member divides the gas from the suction port to a front side and a rear side of the swash plate chamber. Swash plate type compressor that is provided as follows.