JPH09287564A - Reciprocating compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an increase in size and manufacturing cost of a reciprocating compressor, reduce pulsative motion, and prevent generation of abnormal noises. SOLUTION: A valve plate 2 is dividably composed of a throttle adjusting member 41 having only a throttle hole 41a and a valve plate body 40. The throttle adjusting member 41 is detachably fitted to an arcuate recession of the valve plate body 40. A throttle rate of the throttle hole 41a can be varied only by replacing the throttle adjusting member 41 with one having a different hole diameter. It is unnecesary to replace the whole of the valve plate 2 with another kind of one in every change of vehicle models.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating compressor, and more particularly to a reciprocating compressor capable of reducing high pressure pulsation and low pressure pulsation.

[0002]

2. Description of the Related Art Conventionally, as a reciprocating compressor of this type, FIG.
And that shown in FIG. 8 (JP-A-7-189896).

FIG. 7 is a vertical sectional view showing a part of a conventional reciprocating compressor, and FIG. 8 is a sectional view taken along line VII-VII of FIG.

The cylinder block 101 includes a shaft 1
A plurality of cylinder bores 106 are provided at predetermined intervals in the circumferential direction around the center 05. Cylinder block 10
A rear head 103 is fixed to the rear end surface of the valve 1 via a valve plate 102, and a discharge chamber 112 and a suction chamber 113 are formed in the rear head 103.

The valve plate 102 has a discharge port 116 for connecting the cylinder bore 106 and the discharge chamber 112.
And a suction port (not shown) that communicates the cylinder bore 106 with the suction chamber 113.

The discharge port 116 is opened and closed by a discharge valve 117, and the discharge valve 117 is fixed to the rear head side end surface of the valve plate 102 by a valve retainer 118 and a bolt 119, and the bolt 119 is fixed to the valve plate 102.

A recess 101a is provided on the outer peripheral surface of the cylinder block 101, and a discharge flange 131 is attached to the opening end of the recess 101a via a seal member 130. The cylinder block 101 and the discharge flange 131 form a compression chamber 132. It is formed.

The compression chamber 132 and the discharge chamber 112 have a passage 135 (see FIG. 8) provided in the cylinder block 101.
And a throttle hole 141a provided in the valve plate 102
And communicate with.

The high-pressure refrigerant gas discharged from each cylinder bore 106 into the discharge chamber 112 has a passage 135 and a throttle hole 14.
It is introduced into the suppression chamber 132 through 1a. The high-pressure refrigerant gas is throttled by the passage 135 and the throttle hole 141 a before reaching the compression chamber 132, expanded in the compression chamber 132, and discharged from the discharge port 13.
It is sent out from 1a. In this way, the refrigerant gas is drawn through the throttle hole 1
Since it is sent out via 41a and the suppression chamber 132,
The pulsating component is attenuated.

[0010]

By the way, the vehicle air conditioner is set for each vehicle type, and even if the vehicle air conditioner is operated under the same conditions, the high pressure and the low pressure are different for each vehicle type. In the machine, the throttling amount by the throttling hole 141a of the valve plate 102 of the refrigerant compressor is changed for each vehicle type,
The volume of the compression chamber 132 must be changed.

However, in the method of changing the volume of the compression chamber 132 for each vehicle type, when the volume of the compression chamber 132 is increased, the refrigerant compressor itself is increased in size, and it is difficult to mount it on the vehicle. .

On the other hand, the method of changing the throttle amount by the throttle hole 141a of the valve plate 102 does not require a large mounting space, but various valve plates 102 corresponding to the number of vehicle models are prepared in advance. There is a problem in that it has to be done and costs money.

The present invention has been made in view of the above circumstances, and its problem is a reciprocating compressor capable of reducing pulsation and preventing abnormal noise while preventing an increase in size and an increase in cost. Is to provide.

[0014]

In order to solve the above-mentioned problems, a reciprocating compressor according to a first aspect of the present invention includes a cylinder block having a plurality of cylinder bores, and a valve plate on one side or both sides of the cylinder block. And a pressure chamber that is formed in the side member and that communicates with a compression chamber in the cylinder bore through a first hole of the valve plate, and a pressure chamber that is formed in the cylinder block. In a reciprocating compressor including a pressure suppression chamber that communicates with the pressure chamber via a second hole, the valve plate includes a throttle amount adjusting member having the second hole and the first hole. The valve plate body is separated from the valve plate body, and the throttle amount adjusting member is detachably held by the valve plate body.

As described above, since the valve plate is separated into the throttling amount adjusting member having only the throttling hole and the valve plate body, and the throttling amount adjusting member is detachably held by the valve plate body, the throttling amount adjusting member. It is possible to change the amount of throttling by the throttling hole by simply exchanging only one with another type of throttling amount adjusting member having a different hole diameter, and it is not necessary to replace the entire valve plate with another valve plate for each vehicle model.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view of an oscillating plate type compressor according to a first embodiment of the present invention.

Cylinder block 1 of this oscillating plate compressor
A rear head (side member) 3 is fixed to one end surface of the valve via a valve plate 2, and a front head 4 is fixed to the other end surface thereof.

The cylinder block 1 is provided with a plurality of cylinder bores 6 around the drive shaft 5 at predetermined intervals in the circumferential direction. A piston 7 is slidably accommodated in each of the cylinder bores 6.

A crank chamber 8 is provided in the front head 4.
The crank chamber 8 accommodates a swing plate 10 that swings around the hinge ball 9 as the drive shaft 5 rotates. The rocking plate 10 is connected to the piston 7 via a connecting rod 11, and the rocking of the rocking plate 10 causes the piston 7 to reciprocate in the cylinder bore 6.
The oscillating plate 10 has a larger inclination angle as the pressure in the crank chamber 8 decreases, and conversely becomes smaller as the pressure in the crank chamber 8 increases.

A discharge chamber (pressure chamber) 12 and a suction chamber (pressure chamber) 13 located around the discharge chamber 12 are formed in the rear head 3.

The valve plate 2 is composed of a valve plate body 40 and a disc-shaped throttle amount adjusting member 41 detachably held by the valve plate body 40. The valve plate body 40 has a discharge port (first hole) 14 for communicating the cylinder bore 6 with the discharge chamber 12.
And a suction port (first hole) 15 that connects the cylinder bore 6 and the suction chamber 13 to each other. The discharge port 14 is opened and closed by a discharge valve 16, and the discharge valve 16 is provided with a valve retainer 17 on the end face of the valve plate body 40 on the rear head side.
It is fixed together with a bolt 18, and this bolt 18 is screwed into a screw hole 19 of the cylinder block 1. Further, the intake port 15 is opened and closed by an intake valve 21, and the intake valve 21 includes the valve plate body 40 and the cylinder block 1.
It is arranged between and.

FIG. 2 is an enlarged sectional view showing a part of the oscillating plate compressor of FIG. 1, FIG. 3 is a view of the fitting state of the valve plate body and the throttle amount adjusting member as seen from the rear side, and FIG. FIG. 5 is a cross-sectional view of the throttle amount adjusting member, and FIG. 5 is a view showing a separated state of the valve plate body and the throttle amount adjusting member.

A diaphragm hole (second hole) 41a is provided at the center of the diaphragm amount adjusting member 41. The throttle amount adjusting member 41 is fitted into an arcuate recess 40a provided on the outer peripheral surface of the valve plate body 40. Aperture amount adjusting member 41
Rubber 42 is coated on both end surfaces as a seal member.

Further, the cylinder block 1, the valve plate main body 40, etc. are provided with a communication passage 22 for communicating the suction chamber 13 with the crank chamber 8, and a valve chamber 23 is provided in the middle of the communication passage 22. A pressure regulating valve 24 is housed in the valve chamber 23.

A concave portion 1a is provided on the outer peripheral surface of the cylinder block 1. A discharge flange 31 is attached to the opening end of the recess 1 a via a seal member 30, and the cylinder block 1 and the discharge flange 31 form a pressure suppression chamber 32. The discharge flange 31 is provided with a discharge port 31 a that communicates with the compression chamber 32.

A hole 33 communicating with the compression chamber 32 is provided on the rear end surface of the cylinder block 1, and
A protrusion 36 that supports the diaphragm amount adjusting member 41 is provided. A port 34 is provided on the front end surface of the rear head 3, and the port 34 is provided in the passage 3 provided in the rear head 3.
It communicates with the discharge chamber 12 through 5. The hole 33 and the port 34 communicate with each other through the throttle hole 41 a of the throttle amount adjusting member 41.

Next, the operation of the above oscillating plate compressor will be described.

When the rotational power of the vehicle-mounted engine (not shown) is transmitted to the drive shaft 5, the oscillating plate 1 is rotated along with the rotation of the drive shaft 5.
0 swings, and the swing causes the piston 7 to reciprocate sequentially in the cylinder bores 6 to change the volume in each cylinder bore 6, and the suction, compression and discharge of the refrigerant gas are sequentially performed due to the change in the volume. A high-pressure refrigerant gas having a capacity corresponding to the inclination angle of the moving plate 10 is discharged.

That is, when the heat load decreases and the pressure adjusting valve 24 closes the communication passage 22, the refrigerant gas in the crank chamber 8 does not leak to the suction chamber 13 side through the communication passage 22,
Since the high pressure gas supplied from the discharge chamber 12 through the throttle (not shown) is accumulated in the crank chamber 8, the pressure in the crank chamber 8 increases. As the pressure in the crank chamber 8 increases, the inclination angle of the oscillating plate 10 decreases, which reduces the stroke amount of the piston 7 and reduces the discharge capacity.

When the heat load increases and the pressure regulating valve 24 opens the communication passage 22, the pressure in the crank chamber 8 is increased.
Leaks to the suction chamber 13 side through the crank chamber 8
The pressure inside is reduced. As the pressure in the crank chamber 8 decreases, the inclination angle of the oscillating plate 10 increases, thereby increasing the stroke amount of the piston 7 and increasing the displacement.

The refrigerant gas compressed in the compression chamber in the cylinder bore 6 opens the discharge valve 16 and flows into the discharge chamber 12 from the discharge port 14 of the valve plate body 40. Discharge chamber 12
The refrigerant gas of the passage 35, the port 34, the throttle amount adjusting member 4
It flows into the pressure suppression chamber 32 through the first throttle hole 41a and the passage 33, and is discharged from the discharge port 31a.

The high-pressure refrigerant gas is throttled by the throttle hole 41a of the throttle amount adjusting member 41 before reaching the compression chamber 32 and expanded in the compression chamber 32, so that the discharge pulsation is reduced.

According to the first embodiment, the valve plate 2 is separated into the valve plate body 40 and the throttle amount adjusting member 41 having the throttle hole 41a. Therefore, only the throttle amount adjusting member 41 has a different hole diameter. The amount of throttling by the throttling hole 41a can be changed according to the vehicle type simply by exchanging the type of throttling amount adjusting member, and it is not necessary to replace the entire valve plate with another valve plate for each vehicle type, thus increasing the size and cost. It is possible to reduce the pulsation while preventing the increase of.

FIG. 6 is a view showing a part of a valve plate of an oscillating plate type compressor according to a second embodiment of the present invention. Portions common to the above-described embodiments are denoted by the same reference numerals, and description thereof is omitted.

In the above-described first embodiment, the case where the arcuate recess 40a is provided on the outer peripheral surface of the valve plate body 40 and the disk-shaped throttle amount adjusting member 41 is fitted into the arcuate recess 40a has been described. Instead, as shown in FIG. 6, two convex portions 80 are formed on the outer peripheral surface of the valve plate body 80.
It is also possible to provide a and 80b and to fit the disk-shaped diaphragm amount adjusting member 41 between the convex portions 80a and 80b.

According to the second embodiment, the same effect as that of the first embodiment can be obtained.

In each of the above-described embodiments, the case where the disk-shaped diaphragm amount adjusting member 51 is used has been described, but the diaphragm amount adjusting member is not limited to the disk shape and may have another shape.

In each of the above-mentioned embodiments, the case where the present invention is applied to the reduction of the discharge pulsation has been described, but the present invention can also be applied to the reduction of the suction pulsation.

Further, in each of the above-described embodiments, the case where the present invention is applied to the oscillating plate type compressor has been described, but the present invention is not limited to the oscillating plate type compressor, and other swash plate type compressors and the like may be used. It can also be applied to a reciprocating compressor of the type.

[0041]

As described above, according to the reciprocating compressor of the invention described in claim 1, only the throttle amount adjusting member having the throttle hole is replaced with another type of throttle amount adjusting member having a different hole diameter. With, you can change the aperture amount by the aperture hole,
Since it is not necessary to replace the entire valve plate with another valve plate for each vehicle model, pulsation can be reduced while preventing an increase in size and cost.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a wobble plate compressor according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a part of the oscillating plate type compressor of FIG.

FIG. 3 is a view of the fitting state of the valve plate body and the throttle amount adjusting member as seen from the rear side.

FIG. 4 is a cross-sectional view of a diaphragm amount adjusting member.

FIG. 5 is a view showing a separated state of the valve plate body and the throttle amount adjusting member.

FIG. 6 is a diagram showing a part of a valve plate of an oscillating plate compressor according to a second embodiment of the present invention.

FIG. 7 is a sectional view showing a part of a conventional oscillating plate compressor.

FIG. 8 is a sectional view taken along line VII-VII of FIG.

[Explanation of symbols]

 1 Cylinder Block 2 Valve Plate 3 Rear Head 6 Cylinder Bore 12 Discharge Chamber 14 Discharge Port 31 Discharge Flange 32 Squeezing Chamber 34 Port 35, 33 Passage 36 Convex 40, 80 Valve Plate Body 41 Throttling Amount Adjusting Member 41a Throttling Amount Adjusting Hole 80a, 80b convex part

Claims (1)

[Claims] 1. A cylinder block having a plurality of cylinder bores, a side member fixed to one or both sides of the cylinder block via a valve plate, and a first member of the valve plate formed on the side member.
A reciprocating chamber having a pressure chamber communicating with the compression chamber in the cylinder bore through the hole, and a pressure suppressing chamber formed in the cylinder block and communicating with the pressure chamber through the second hole of the valve plate. In the compressor, the valve plate is separated into a throttle amount adjusting member having the second hole and a valve plate main body having the first hole, and the throttle amount adjusting member is provided in the valve plate main body. A reciprocating compressor which is detachably held.