JP5487019B2 - Variable capacity compressor - Google Patents

Description

  The present invention relates to a variable capacity compressor that lubricates a lubricated part with oil contained in a refrigerant, and more particularly to an apparatus that adjusts the amount of oil supplied to the lubricated part.

In variable capacity compressors used in vehicle heat pump air conditioners and the like, lubrication of lubricated parts such as sliding parts of the compressor is performed by supplying oil contained in refrigerant circulating in the compressor. Yes.
However, oil may be excessively stored in the crank chamber in the compressor during compressor operation. If the oil is excessively stored in the crank chamber, there is no problem when the rotating body in the crank chamber is at a low speed. However, when the oil rotates at a high speed, the oil is stirred at a high speed, and frictional heat is generated by the stirring. The frictional heat causes the oil and crank chamber to become extremely hot, and the entire compressor also becomes hot. When the temperature is high, the durability of the resin material or rubber material member is lowered.

  For this reason, in Patent Document 1, an oil storage chamber is provided outside the compressor in communication with the compressor internal space (crank chamber), and the centrifugal force acting on the oil during high speed rotation of the rotating member is increased. A technique for suppressing frictional heat by storing excess oil in an oil storage chamber is disclosed.

JP 2009-150261 A

However, in the technique disclosed in Patent Document 1, when oil is stored in the storage chamber above the oil introduction passage, the refrigerant blocked in the storage chamber is pressurized and the oil does not easily flow into the storage chamber. It was difficult to store a sufficient amount of oil in the chamber.
The present invention has been made paying attention to such a conventional problem, and in a variable capacity compressor, by adjusting the oil supply amount to the lubricated part to an appropriate amount according to the rotational speed of the rotating member in the compressor. It aims at ensuring lubrication performance and ensuring the durability of each member.

In order to achieve this object, the present invention provides:
A cylindrical storage member; a rotation member that is driven to rotate in a non-horizontal plane around a central axis of the cylindrical storage member; and a plurality of cylinders formed around the outer side of the central axis of the cylindrical storage member. A plurality of pistons that reciprocate in an axial direction parallel to the shaft to suck / discharge refrigerant, a movement direction conversion mechanism that converts the rotational movement of the rotating member into a reciprocating movement of the piston, and rotation in the movement direction conversion mechanism A variable displacement compressor that includes a control mechanism that controls the amount of piston reciprocation relative to the amount of rotation of the member to control the refrigerant discharge amount includes the following configuration.

An oil receiving portion for receiving the oil in the refrigerant to which the centrifugal force acts is disposed outside the rotation locus of the rotating member in the inner space that houses the rotating member of the cylindrical storage member.
A first communication hole that is formed through the inside and outside of the cylindrical storage member and is close to the oil receiving portion on the upstream side in the rotation direction of the rotation member, and the first communication hole is the rotation direction. A plurality of communication holes including a second communication hole disposed apart from each other are disposed.

  A storage chamber for storing oil in the refrigerant is provided outside the cylindrical storage member so as to communicate with the inner space of the cylindrical storage member via the plurality of communication holes.

In the inner space of the cylindrical storage member, the oil that is stirred together with the refrigerant and subjected to centrifugal force by the rotation of the rotating member is received by the oil receiving portion, and the received oil passes through the first communication hole that is close. Through the storage chamber.
At this time, among the plurality of communication holes, the refrigerant in the oil storage chamber is discharged into the inner space of the cylindrical storage member through the communication hole located on the upper side, and the pressurization in the storage chamber is suppressed, so that the oil Smoothly flows into the storage chamber.

The amount of oil flowing in (or about to flow in) from the first communication hole and the amount of oil flowing out (or about to flow out) from any of the communication holes due to the weight of the oil stored in the storage chamber In an equilibrium state, excess oil can be stored in the storage chamber.
Here, during high-speed rotation of the rotating member, a large amount of excess oil is stored in the storage chamber and the amount of oil stirred by the rotating member is reduced, thereby suppressing the generation of frictional heat due to the oil stirring and lubricating performance. , Durability can be ensured.

  On the other hand, when the rotating member is at a low speed, the reduction of the centrifugal force acting on the oil suppresses the oil from being stored in the storage chamber, so that the amount of oil remaining in the inner space of the cylindrical storage member can be increased. A good lubricating performance can be ensured by increasing the amount of oil supplied to the portion to be lubricated.

1 is a longitudinal sectional view showing a variable capacity compressor according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line FF in FIG. The figure which looked at the compressor same as the above from the front. CC sectional view taken on the line of FIG. The schematic diagram which shows 2nd Embodiment and 3rd Embodiment which show another example which provides a storage chamber in the side rotated toward the downward direction from upper direction like 1st Embodiment. The schematic diagram which shows the 4th-6th embodiment which provides a storage chamber in the side rotated upwards from the downward direction. Schematic diagram showing a seventh embodiment different from the fourth to sixth embodiments in which a storage chamber is provided on the side rotating from the lower side to the upper side. The schematic diagram which shows 8th Embodiment which provides a some storage chamber. The longitudinal cross-sectional view which shows 9th Embodiment which provides an oil receiving part separately from a through bolt. The longitudinal cross-sectional view which shows 10th Embodiment applied to the variable displacement compressor of a different type.

Embodiments of the present invention will be described below with reference to the drawings.
1 to 4 are longitudinal sectional views of a variable capacity compressor to which the present invention is applied.
A variable capacity compressor 100 used in a vehicle air conditioner is provided at one end of a cylinder block 101 having a plurality of (six in this embodiment) cylinders 101a around an outer periphery of a central axis. A front housing 102 and a rear housing 104 provided at the other end of the cylinder block 101 via a valve plate 103 are provided.

The front housing 102, the cylinder block 101, the valve plate 103, and the rear housing 104 constituting these cylindrical storage members are mutually connected by a plurality of (six in this embodiment) through bolts 201 penetrating these peripheral portions. It is concluded.
A drive shaft 106 is provided across the crank chamber (inner space of the cylindrical storage member) 105 defined by the cylinder block 101 and the front housing 102, and a swash plate 107 is provided around the center thereof. Has been placed.

  The swash plate 107 is coupled to a rotor 108 fixed to the drive shaft 106 via a connecting portion 109, and the inclination angle of the swash plate 107 is variable along the drive shaft 106. A coil spring 110 is mounted between the rotor 108 and the swash plate 107 to urge the swash plate 107 toward the minimum inclination side, and the swash plate 107 is disposed on the opposite side of the swash plate 107. A coil spring 111 that biases the inclination angle toward the increasing direction is mounted.

One end of the drive shaft 106 penetrates through a boss portion 102a protruding to the outside of the front housing 102 and extends to the outside, and is connected to a pulley 131 that engages with a compressor drive belt (not shown) of the electromagnetic clutch. It is connected through a connection 132 freely.
A shaft seal device 112 is inserted between the drive shaft 106 and the boss portion 102a to block the inside and outside of the compressor.

  A piston 117 is inserted into the cylinder 101 a so as to be able to reciprocate. The periphery of the outer peripheral portion of the swash plate 107 is accommodated in a recess 117 a at one end inside the piston 117. The piston 117 and the swash plate 107 are configured to interlock with each other via a pair of shoes 118 that are in sliding contact. Therefore, the piston 117 can reciprocate in the cylinder 101a by the rotation of the drive shaft 106, and these series of members constitute a motion direction conversion mechanism.

  A suction chamber 119 and a discharge chamber 120 are defined in the rear housing 104. The suction chamber 119 is connected to the cylinder 101a through a communication hole 103a (suction hole) provided in the valve plate 103 and a suction valve (not shown). The discharge chamber 120 communicates with the cylinder 101a via a discharge valve (not shown) and a communication hole 103b (discharge hole) provided in the valve plate 103.

The suction chamber 119 is connected to the air conditioner system side via a suction port (not shown), and the discharge chamber 120 is connected to the air conditioner system side via a discharge port (not shown).
The rear housing 104 is provided with a capacity control valve 200. The capacity control valve 200 adjusts the opening of an air supply passage 121 (121a, 121b) that communicates the discharge chamber 120 and the crank chamber 105, and controls the amount of discharge gas introduced into the crank chamber 105. In addition, the refrigerant in the crank chamber 105 enters the suction chamber 119 via a bleed passage through a clearance between the outer periphery of the drive shaft 106 and the bearing 115, a space 122 and a fixed orifice 103c formed in the valve plate 103 and having a fixed opening. Flowing. Therefore, the discharge capacity can be controlled by adjusting the discharge gas introduction amount into the crank chamber 105 by the capacity control valve 200 and changing the pressure in the crank chamber 105.

In the variable capacity compressor 100 having such a basic structure, an appropriate amount of oil contained in the refrigerant in the crank chamber 105 is stored in accordance with the operation state (rotational speed), and thereby the lubrication target in the compressor 100 is stored. A storage chamber that appropriately maintains the amount of oil supplied to the section is formed as follows.
As shown in FIG. 2, of the six through bolts 201 described above, one is above the through bolt 201 positioned directly below and upstream of the rotational member (hereinafter simply referred to as the rotational direction) of the rotating member such as the swash plate 107. A first communication hole 202 penetrating the inside and outside of the peripheral wall of the front housing 102 adjacent to the upstream side in the rotation direction is formed with respect to the through bolt 201a located on the side.

In addition, a second communication hole 203 is formed that penetrates the inside and outside of the peripheral wall of the front housing 102 adjacent to the downstream side in the rotational direction with respect to the through bolt 201b positioned one upstream from the through bolt 201a and upstream in the rotational direction. To do.
The first communication hole 202 and the second communication hole 203 are formed near the front end portion of the front housing 102. As a result, even when the maximum capacity, that is, when the swash plate 107 is at the maximum tilt and the piston 117 is at the maximum stroke, the first communication hole 202 and the oil in the refrigerant become dense without interfering with the piston 117. A second communication hole 203 is formed.

Then, a protruding wall 101b that surrounds the peripheral wall of the front housing 102 in a rectangular shape including the first communication hole 202 and the second communication hole 203 inside is formed, and the outer opening end of the protruding wall 101b is covered with the cover 204. Are brought into contact with each other and sealed, and four rectangular corners are fastened by bolts 205.
Thus, an oil storage chamber 206 is formed in the inner space surrounded by the peripheral wall of the front housing 102, the protruding wall 101 b and the cover 204.

Next, the operation of the storage chamber 206 will be described.
The refrigerant in the crank chamber 105 also rotates in the crank chamber 105 by the rotation of the rotating member such as the rotor 108 and the swash plate 107 connected to the rotor 108 according to the rotational speed of the engine or motor that is the driving source of the variable compressor 100. Then, the oil contained in the refrigerant receives a rotational centrifugal force.

  The oil subjected to the centrifugal force rotates along the outer peripheral side in the crank chamber 105 and is received by the upstream side of the through-bolt 201. In particular, the oil received by the through-bolt 201a is the first adjacent to the upstream side. It flows into the storage chamber 206 through the communication hole 202. Thus, in this embodiment, the intermediate part exposed in the crank chamber 105 of the through-bolt 201a comprises an oil receiving part.

When the rotational speed is low and the centrifugal force acting on the oil is less than or equal to a predetermined value, when the oil level flowing into the storage chamber 206 reaches the first communication hole 202, the amount of flow into the storage chamber 206 And the amount of outflow from the storage chamber 206 are balanced, and storage in the storage chamber 206 can be suppressed.
On the other hand, when the oil received by the other through-bolts 201 reaches a receiving amount corresponding to the centrifugal force, the more oil falls by its own weight or flows down along the inner wall of the front housing 102 and accumulates at the bottom of the crank chamber 105.

During low-speed rotation, the amount of oil stored in the storage chamber 206 is small as described above, and most of the oil is retained in the crank chamber 105.
At low speed, the oil film is more likely to be cut off at the rotating member such as the swash plate 107 and the sliding portion such as the piston 117 that are to be lubricated, and the amount of oil necessary for lubrication increases. A large amount of oil stays inside, and the oil is scraped up by a rotating member such as the swash plate 107 and a sufficient amount of oil is supplied to the lubricated part, thereby preventing oil film breakage and ensuring good lubricating performance. Can do.

In addition, the frictional heat is generated by stirring the refrigerant containing oil by the rotation of the rotating member such as the swash plate 107. However, since the heat generation amount is sufficiently low at low speed, the influence of the heat on the compressor can be ignored.
When the rotational speed increases and the centrifugal force acting on the oil increases, the oil received at the upstream side of the through bolt 201a hits the oil with enhanced centrifugal force, and the force that pushes the oil into the storage chamber 206 is increased. Increase. As a result, the amount of oil flowing into the storage chamber 206 increases, and the liquid level of the oil stored in the storage chamber 206 rises from the first communication hole 201a. If it increases, the fluid pressure due to the weight of the oil increases, the amount of oil discharged from the first communication hole 201a also increases, and the liquid level rises until the inflow amount and the outflow amount are balanced.

Thus, the amount of oil stored in the storage chamber 206 increases as the rotational speed increases.
At high speed, the tendency of oil film breakage at the sliding portion decreases, and the amount of oil necessary for lubrication decreases, while heat generation due to stirring of the oil in the refrigerant becomes a problem. However, by increasing the amount of oil stored in the storage chamber 206 as the speed increases, the amount of oil stirred in the crank chamber 105 is decreased, thereby suppressing heat generation and durability of each part of the compressor due to thermal effects. Reduction can be suppressed.

  Further, the oil stored in the storage chamber 206 causes the refrigerant in the storage chamber 206 to be discharged into the crank chamber 105 from the second communication hole 203, so that the oil is smoothly discharged into the storage chamber 206 by a so-called gas venting function. Can flow in. In particular, in the present embodiment, the second communication hole 203 is disposed close to the downstream side of the upper through bolt 201b, and a negative pressure is generated at this position, so that the refrigerant in the storage chamber 206 is supplied to the crank chamber. The degassing action discharged to 105 is promoted, and the oil flows into the storage chamber 206 more smoothly.

As described above, after oil is stored in the storage chamber 206 during high-speed rotation, if the rotational speed of the rotating member decreases, the amount of oil received by the through bolt 201a decreases due to the decrease in centrifugal force received by the oil, and the storage chamber 206 is returned to. And the oil in the storage chamber 206 is returned to the crank chamber 105 from the first communication hole 202 by its own weight.
As in the first embodiment, the first communication hole 202 is disposed above the lowermost part of the crank chamber 105, and the storage chamber 206 is disposed on the side of the crank chamber 105. However, it is also possible to arrange the storage chamber at another position.

5 to 7 show various possible arrangement positions of the storage chamber 206 other than the first embodiment.
In the second and third embodiments shown in FIGS. 5A and 5B, through bolts 201a, which are close to the first communication hole 202 and the second communication hole 203, compared to the first embodiment. Reference numerals 201b respectively denote one on the upper side and one on the lower side. While discharging the refrigerant in the storage chamber 206 from the second communication hole 203 into the crank chamber 105, the oil received on the upstream side in the rotation direction of the through bolt 201a is caused to flow into the storage chamber 206 from the first communication hole 202. Storing up to the liquid level in equilibrium with the outflow amount is the same. However, in the case of (B), as compared with (A), since the storage chamber 206 is located below the first communication hole 202, the oil is easy to flow into the storage chamber 206 and not easily flow out. Become. Therefore, the opening area, opening direction, shape, and the like of the first communication hole 202 may be set so that an appropriate amount of oil is stored with respect to the rotation speed in accordance with each characteristic.

The fourth to sixth embodiments shown in FIGS. 6A to 6C show examples in which the storage chamber 206 is disposed on the side (the left side in the drawing) where the rotating member rotates upward from below. The first communication hole 202 is disposed on the upstream side (lower side) of the common through-bolt 201c located in the central portion in the circumferential direction of the storage chamber 206, and the second on the downstream side (upper side). The communication hole 203 is provided.
Also in this case, the oil is received on the upstream side of the through bolt 201c and flows into the storage chamber 206 through the first communication hole 202. At this time, the oil is disposed on the negative pressure generation side downstream of the through bolt 201c. By discharging the refrigerant in the storage chamber 206 into the crank chamber 206 through the provided second communication hole 203, the oil can flow smoothly.

In the above embodiment, the oil is introduced from the lower first communication hole 202 and the gas is vented from the upper second communication hole 203.
On the other hand, in the seventh embodiment shown in FIG. 7, in the example in which the storage chamber 206 is disposed on the side (the left side in the drawing) where the rotating member rotates upward from below as in FIG. A first communication hole 202 is disposed close to the upstream side in the rotational direction of 201d, and a second communication hole 203 is disposed close to the downstream side of the lower through bolt 201e. That is, it is the same as that of the first embodiment and FIGS. 5A and 5B that the two through bolts adjacent to each communication hole are separate, but the first communication hole 202 is the upper side, The difference is that the two communication holes 203 are located on the lower side.

Even in this case, it is the same that oil received on the upstream side of the through bolt 201 d flows into the storage chamber 206 through the first communication hole 202.
On the other hand, the second communication hole 203 arranged below the storage chamber 206 has a function of flowing into the storage chamber 206 from the first communication hole 202 and discharging stored oil. Then, the storage amount in the storage chamber 206 is adjusted by reducing the opening area of the second communication hole 203 to provide a throttle function. Specifically, the amount of oil inflow from the first communication hole 202 increases due to the increase in the rotational speed, and the amount of oil stored in the storage chamber 206 increases. On the other hand, the hydraulic pressure due to the weight of the oil in the storage chamber 206 increases. The amount of oil discharged from the second communication hole 203 also increases, and the liquid level rises to a point where the inflow amount and the outflow amount are balanced.

  Here, since the 1st communicating hole 202 is connected on the upper side of the storage chamber 206, it is not obstruct | occluded with the oil stored below. Therefore, if the first communication hole 202 has an opening area of a certain extent or more, it has a degassing function for discharging the refrigerant in the storage chamber 206 to the crank chamber 105 simultaneously with the inflow of oil into the storage chamber 206. Thus, the oil can smoothly flow into the storage chamber 206.

As described above, the seventh embodiment is different in that the oil inflow function of the first communication hole 202 and the oil outflow function of the second communication hole 203 are separated, but the upper communication hole is different. The degassing is the same.
In addition, as shown in FIG. 8, a plurality (two in the figure) of storage chambers 206 may be disposed around the crank chamber 105.

As described above, the storage chamber 206 can be placed in various positions around the crank chamber 105, and is in a position that avoids interference with other equipment such as an engine room in which the compressor 100 is disposed. It can be arranged.
However, the position immediately below is excluded because oil is always stored in the storage chamber regardless of the rotational speed. The position directly above should be excluded because it is difficult to store substantially enough oil.

In the above embodiment, the fastening bolt is used as the oil receiving portion. However, the oil receiving portion may be provided separately from the through bolt to promote the oil receiving function.
FIG. 9 shows such an embodiment. In the first embodiment, an oil receiving portion 301 having a predetermined length in the axial direction is formed from the inner wall portion of the front housing 101 near the lower end periphery of the first communication hole 202. , And projecting toward the inside (crank chamber 105 side). The oil receiving portion 301 may be formed integrally with the chlorofluorocarbon and the housing 102, but may be formed separately from the chlorofluorocarbon and the housing 102. The oil receiving portion 301 is preferably disposed so that the lower end surface thereof is connected to the upper surface of the through bolt 201 close to the downstream side. In this way, the through bolt 201 on the side of the oil receiving portion 301 is disposed. The oil received in step 1 can be guided from the first communication hole 202 to the storage chamber 206 through the oil receiving portion 301.

With such a configuration, the oil in the crank chamber 105 can be more efficiently received on the upper surface of the oil receiving portion 301 connected to the first communication hole 202, and the oil can easily flow into the storage chamber 206.
Furthermore, the present invention can also be applied to a variable capacity compressor that is partially different in mechanism from the variable capacity compressor applied in the above embodiment.

  For example, a variable displacement compressor disclosed in Japanese Patent Publication No. 4-28911 or the like includes a swash plate 401 and a piston 402 as shown in FIG. The mechanism for converting to 402 reciprocating motion is different. Specifically, a swing plate 403 is disposed along the inclined surface of the swash plate 401 so as to be freely rotatable relative to the swash plate 401, and the swing plate 403 is disposed on the inner wall of the storage housing 404 along the axial direction. The piston 402 engaged with the guide plate 405 is swung while restraining rotation, and the piston 402 linked to the swing plate 405 via the rod 406 is reciprocated.

  In such a variable capacity compressor, the guide plate 405 is disposed on the outer peripheral side of a rotating member such as the swash plate 401, so that the oil in the refrigerant hits the guide plate 405 and is received. Therefore, even when the storage housing 404 formed by being divided in the axial direction is fastened by means other than through bolts, the present invention can be applied using the guide plate 405 as an oil receiving portion.

  Specifically, as shown in FIG. 5B, the first communication hole 407 penetrating the cylinder block close to the upstream side of the swash plate 401 in the rotational direction of the guide plate 405, and the first communication hole A second communication hole 408 is disposed at a position away from the rotation direction 407, and a storage chamber 409 that includes the first communication hole 407 and the second communication hole 408 is formed outside the storage housing 404. . Then, the second communication hole 408 is disposed above the first communication hole, and oil is introduced into the storage chamber 409 from the first communication hole 407 while the second communication hole 408 has a gas venting function. Alternatively, the first communication hole 407 is disposed higher than the second communication hole 408 so that the first communication hole 407 has a gas venting function and the oil flows in, and the oil flows out from the second communication hole 408. You can make it.

In the above embodiment, the storage chamber may be connected to the cylinder via a negative pressure introduction passage such as a tube and a pipe, and the negative pressure in the suction chamber may be guided to the storage chamber. It becomes easy to introduce oil into the water. In this case, a communication hole having a gas venting function can be connected to the suction chamber.
Further, the storage chamber 206 may be formed to extend in the axial direction so as to extend not only to the front housing but also to the cylinder block and further to the rear housing, thereby expanding the storage capacity.

  DESCRIPTION OF SYMBOLS 100 ... Variable capacity compressor, 101 ... Cylinder block, 101a ... Cylinder, 102 ... Front housing, 103 ... Valve plate, 104 ... Rear housing, 105 ... Crank chamber, 106 ... Drive shaft, 107 ... Swash plate, 108 ... Rotor, 117 ... Piston, 118 ... Shoe, 119 ... Suction chamber, 120 ... Discharge chamber, 121 ... Air supply passage, 200 ... Volume control valve, 201, 201a to 201e ... Through bolt, 202 ... First communication hole, 203 ... No. 2 communication holes, 204 ... cover, 205 ... bolt, 206 ... storage chamber, 301 ... oil receiving part, 401 ... swash plate, 402 ... piston, 403 ... swing plate, 404 ... storage housing, 405 ... guide plate, 406 ... Rod, 407 ... First communication hole, 408 ... Second communication hole

Claims (10)

A cylindrical storage member; a rotation member that is driven to rotate in a non-horizontal plane around a central axis of the cylindrical storage member; and a plurality of cylinders formed around the outer side of the central axis of the cylindrical storage member. A plurality of pistons that reciprocate in an axial direction parallel to the shaft to suck / discharge refrigerant, a movement direction conversion mechanism that converts the rotational movement of the rotating member into a reciprocating movement of the piston, and rotation in the movement direction conversion mechanism In a variable capacity compressor configured to include a control mechanism that controls a refrigerant discharge amount by controlling a conversion amount of piston reciprocation with respect to a member rotation amount,
An oil receiving portion for receiving oil in the refrigerant, which is disposed in an inner space for accommodating the rotating member of the cylindrical storage member and is disposed outside the rotation locus of the rotating member, and subjected to centrifugal force;
A first communication hole that is formed through the inside and outside of the cylindrical storage member and is close to the oil receiving portion on the upstream side in the rotation direction of the rotation member, and the first communication hole is the rotation direction. A plurality of communication holes including a second communication hole disposed apart from each other,
A storage chamber that is formed outside the cylindrical storage member so as to communicate with the inner space of the cylindrical storage member via the plurality of communication holes, and stores oil in the refrigerant;
A variable capacity compressor characterized by comprising.   The variable capacity compressor according to claim 1, wherein a central axis of the cylindrical storage member is disposed in a substantially horizontal direction and is driven by a vehicle drive source.   3. The variable capacity compressor according to claim 1, wherein the first communication hole is disposed at a lower portion of the storage chamber, and the second communication hole is disposed at an upper portion of the storage chamber.   The cylindrical storage member is divided into a plurality of parts in the axial direction, and the oil receiving portion is a cylinder of a plurality of through-bolts around a central axis for fastening the divided cylindrical storage members to each other. The variable capacity compressor according to any one of claims 1 to 3, wherein the compressor is an intermediate portion exposed to the inner space of the cylindrical storage member.   The storage chamber is disposed on a side where the rotating member rotates from above to below, and the first communication hole is disposed close to an upstream side of a through bolt that is close to a lower portion of the storage chamber, 5. The variable capacity compressor according to claim 4, wherein the second communication hole is disposed above the first communication hole adjacent to a downstream side of another through bolt adjacent to the upper portion of the storage chamber.   The storage chamber is disposed on a side where the rotating member rotates upward from below, and the first communication hole is disposed below a through bolt disposed in an intermediate portion in the vertical direction of the lower portion of the storage chamber. The variable capacity compressor according to claim 4, wherein the second communication hole is disposed above the same through bolt.   The storage chamber is disposed on a side where the rotating member rotates from below to above, and the first communication hole is disposed in proximity to an upstream side of a through bolt that is close to the upper portion of the storage chamber, 5. The variable capacity compressor according to claim 4, wherein the second communication hole is disposed below the first communication hole adjacent to a downstream side of another through bolt adjacent to the lower portion of the storage chamber.   The rotating member is coupled to the drive shaft with an inclined rotation surface, and the control mechanism controls a rotation surface inclination angle of the rotating member, thereby reciprocating the piston with respect to the rotation amount of the rotating member in the motion direction conversion mechanism. The variable capacity compressor according to any one of claims 1 to 7, wherein a refrigerant discharge amount is controlled by controlling a dynamic conversion amount.   The movement direction conversion mechanism converts the rotary motion of the rotating member into a reciprocating motion of the piston through a swing plate that swings by the rotary motion, and the oil receiving portion prevents the swing plate from rotating. The variable capacity compressor according to claim 8, comprising a guide plate disposed on an inner wall of the cylindrical housing member so as to be swung.   The variable capacity compressor according to any one of claims 1 to 9, wherein the storage chamber communicates with a suction chamber that sucks a refrigerant into the cylinder.