JP2007056860A - Rotary compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the reliability of a rotary compressor by increasing the rigidity of a bearing part without changing the hole position of a delivery port in the upper support member bearing part of an upper support member as a part forming a rotary compression element or without reducing the diameter of a rotating shaft. <P>SOLUTION: This rotary compressor comprises, in a hermetic container, drive elements, a cylinder having the rotary compression element driven by the drive elements and forming the rotary compression element, a support member closing the opening face of the cylinder, and two discharge noise reducing chambers formed by a discharge noise reducing chamber formed by the support member and a partition plate, the partition plate, and a cover. The outer diameters of a discharge port part formed in the upper support member and the upper bearing part not interfered with a recessed part for fitting a discharge valve are formed thicker, and the upper support member and the cover are mounted by press-fitting. The partition plate forming the discharge noise reducing chamber together with the upper support member is formed in the same shape as the upper support member bearing part. The end of the upper bearing is rounded. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a rotary compressor including a driving element in a hermetic container and a rotary compression element driven by a rotation shaft of the driving element.

Conventionally, a rotary compressor of this type, for example, a multi-stage compression rotary compressor having first and second rotary compression elements, has a first and a second driven by a drive element and a rotary shaft of the drive element in a sealed container. 2 rotational compression elements.

The first and second rotary compression elements include an intermediate partition plate, upper and lower cylinders disposed above and below the intermediate partition plate, and an eccentricity provided in the rotation shaft with a phase difference of 180 degrees inside these cylinders. A roller that is fitted to the part and rotates eccentrically, a vane that abuts on each roller and divides the inside of the cylinder into a low-pressure chamber side and a high-pressure chamber side, an upper opening surface of the upper cylinder, and a lower side of the lower cylinder Each of the opening surfaces is closed, and includes an upper support member and a lower support member each having a bearing for a rotating shaft, and discharge muffler chambers formed on the upper and lower sides, respectively. Each discharge silencer chamber and the high-pressure chamber side in each cylinder communicate with each other via a discharge port, and a discharge valve that closes the discharge port in an openable and closable manner is provided in the discharge silencer chamber.

The cover shape that forms the discharge silencing chamber together with the upper support member extends as much as possible in the longitudinal direction of the upper support member, and is discharged into the sealed container from an opening provided in a ring shape near the outer diameter portion of the upper support member. It was. (For example, see Patent Document 1)
JP 2003-97473 A

  However, in order to increase the thickness of the bearing portion of the upper support member and increase the rigidity of the bearing portion, it is necessary to change the discharge port position or to reduce the diameter of the rotary shaft. There is a problem in that the efficiency of the rotating shaft decreases and the rotating shaft becomes thinner, so that the deflection of the rotating shaft increases and the reliability decreases.

  In addition, it is difficult to improve the rigidity of the bearing portion against an increase in load due to the use conditions of the compressor, and there is a problem that the amount of deflection of the rotating shaft increases and the reliability decreases.

  Further, the discharge silencer chamber formed by the upper support member, the partition plate, and the cover has a problem that noise increases due to a change in the discharge passage area and the discharge passage shape due to a change in the shape of the bearing portion of the upper support member. there were.

  The rotary compressor of the present invention closes a drive element in a sealed container, a rotary compression element driven by a rotary shaft connected to the drive element, and an opening of a cylinder forming the rotary compression element, Formed on the upper support member in a compressor having a discharge silencer chamber formed by closing with a support member having a bearing of the rotating shaft and a cover attached to the surface of the support member opposite to the cylinder The outer diameter of the upper support member that does not intersect with the discharge port portion and the concave portion to which the discharge valve is attached is thickened, and the natural frequency of the upper support member is changed, and the bearing portion and cover of the upper support member are sealed The part is attached by press fitting.

In addition to the above, the rotary compressor according to claim 2 is provided with a partition plate for partitioning the discharge silencer chamber formed by the upper support member and the cover into the first discharge silencer chamber and the second discharge silencer chamber. The inner peripheral shape of the plate is the same as the outer peripheral shape of the upper support member bearing portion, and the gap between the support member and the partition plate is made uniform, thereby improving the expansion muffler effect.

Further, in addition to claims 1 and 2, the rotary compressor of claim 3 has improved sealing performance by making the shape of the bearing front end of the upper support member round, thereby improving the expansion muffler effect. It is characterized by that.

  As described above in detail, according to the present invention, a sealed element is provided with a drive element and a rotary compression element driven by a rotary shaft connected to the drive element. A discharge port portion formed in the upper support member, and a discharge valve having a discharge member chamber that is formed by the support member that closes the opening surface of the cylinder, the support member, and the cover. The reliability of the bearing portion can be improved by increasing the rigidity of the outer diameter of the upper bearing portion that does not intersect with the recessed portion to be attached to increase the rigidity. Further, by changing the natural frequency of the upper support member, it is possible to reduce the noise generated by the vibration of the internal parts. Further, by attaching the upper support member bearing portion and the seal portion of the cover by press fitting, it is possible to improve the muffler effect of the discharge silencing chamber and to reduce noise.

According to the invention of claim 2, in addition to the above, a partition plate is provided for partitioning the discharge silencer chamber formed by the upper support member and the cover into the first discharge silencer chamber and the second discharge silencer chamber. The inner peripheral shape of the partition plate is the same shape as the outer peripheral shape of the upper support member bearing portion, and the gap between the support member and the partition plate is made uniform, thereby improving the expansion muffler effect and by the pulsation of the discharge gas Noise can be reduced.

According to the invention of claim 3, in addition to claims 1 and 2, the shape of the seal surface of the upper support member and the cover at the tip of the upper bearing of the upper support member is rounded. The muffler effect of the second discharge silencing chamber is improved, and the noise generated by the pulsation of the discharge gas can be further reduced.

  The present invention is characterized in that the rigidity of the bearing portion of the upper support member is increased and the reliability is improved without changing the discharge port position of the rotary compressor. Further, by changing the natural frequency of the upper support member, the noise generated by the vibration of the internal parts is reduced, and the partition plate that forms the first discharge silencer chamber together with the upper support member is provided with the upper support member bearing portion. The expansion muffler effect is further improved by adopting the same shape as the above shape, and the sealing performance of the cover is improved by rounding the shape of the seal portion at the tip of the upper bearing, and the second discharge silencer chamber Realized by improving the muffler effect.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal side view of an internal high-pressure rotary compressor 10 having first and second rotating elements 32 and 34 as an embodiment of the rotary compressor of the present invention, and FIG. 2 is a support member 54 of the present invention. FIG. 3 shows a plan view of the support member 54 of the present invention.

In each drawing, the rotary compressor 10 of the embodiment is an internal high-pressure type rotary compressor 10 as a drive element disposed in a vertical cylindrical sealed container 12 made of a steel plate above the internal space of the sealed container 12. And a rotary compression mechanism portion 18 including a first rotary compression element 32 and a second rotary compression element 32, which are disposed on the lower side of the electric element 14 and driven by the rotary shaft 16 of the electric element 14. ing. In the rotary compressor 10 of the embodiment, carbon dioxide is used as a refrigerant.

The hermetic container 12 has an oil reservoir at the bottom, and includes a container body 12A that houses the electric element 14 and the rotary compression mechanism, and a substantially bowl-shaped end cap (lid body) 12B that closes the upper opening of the container body 12A. In addition, a circular mounting hole 12D is formed on the upper surface of the end cap 12B, and a terminal (wiring is omitted) 20 for supplying power to the electric element 14 is mounted in the mounting hole 12D. Yes.

  The electric element 14 includes a stator 22 that is welded and fixed in an annular shape along the inner peripheral surface of the upper space of the sealed container 12, and a rotor 24 that is inserted and installed inside the stator 22 with a slight gap. The rotor 24 is fixed to a rotary shaft 16 that extends in the vertical direction through the center.

  The stator 22 has a laminated body 26 in which donut-shaped electromagnetic steel plates are laminated, and a stator coil 28 wound around the teeth of the laminated body 26 by a direct winding (concentrated winding) method. Similarly to the stator 22, the rotor 24 is also formed of a laminated body 30 of electromagnetic steel plates.

  The first rotary compression element 32 and the second rotary compression element 34 have the second rotary compression element 34 at the second stage sandwiched by an intermediate partition plate 36 as an intermediate partition member, and the electric element 14 in the sealed container 12. The first rotary compression element 32 that is the first stage is arranged on the side opposite to the electric element 14. That is, the first rotary compression element 32 and the second rotary compression element 34 are the lower cylinder 40 as the first cylinder and the second cylinder as the first and second rotary compression elements 32, 34. An opening between the upper cylinder 38 and each of the cylinders 38, 40 is provided on the opening of the lower cylinder 40 on the side of the electric element 14 (upper side) and on the side of the upper cylinder 38 opposite to the electric element 14 (lower side). The intermediate partition plate 36 to be closed, and the upper and lower cylinders 38, 40 are fitted into first and second eccentric portions 42, 44 provided on the rotary shaft 16 with a phase difference of 180 degrees, and each cylinder 38, The first roller 48 and the second roller 46 that rotate eccentrically in the shaft 40, and the rollers 46 and 48 are in contact with each other to partition the cylinders 38 and 40 into a low pressure chamber side and a high pressure chamber side, respectively (not shown). Vane and lower cylinder 40 A lower support member 56 serving as a first support member having a bearing 56A of the rotating shaft 16 by closing an opening (lower side) opposite to the electric element 14 side, and the electric element 14 side of the second cylinder 38 The upper support member 54 as a second support member having the bearing 54A of the rotating shaft 16 and the bearings 54A and 56A of the upper and lower support members 54 and 56 are provided outside the upper support member while closing the (upper) opening. A partition plate 65 for constituting the first discharge silencing chamber 62A and a cover 63 constituting the second discharge silencing chamber 62B are attached to the member 54 through the partition plate 65, and the intermediate pressure discharge silencing is attached to the lower support member 56. It is comprised with the obstruction | occlusion plate 68 for comprising the chamber 64. FIG.

  The upper support member 54 and the lower support member 56 are provided with suction passages 58 and 60 that communicate with the inside of the upper and lower cylinders 38 and 40 through the suction ports 160 and 161 and discharge silencer chambers 62A, 62B, and 64, respectively. Yes. The first discharge silencing chamber 62A is formed by recessing the surface opposite to the upper cylinder 38 of the upper support member 54 as described above, and closing the recess with the partition plate 65. Further, the second discharge silencing chamber 62 </ b> B is formed by attaching a cover 63 to the partition plate 65. Further, the intermediate pressure discharge silencing chamber 64 is formed by recessing the surface of the lower support member 56 opposite to the first cylinder 40 and closing the recess with a closing plate 68. That is, the first discharge silencing chamber 62A is blocked by the partition plate 65, the second discharge silencing chamber 62B is blocked by the cover 63, and the intermediate pressure discharge silencing chamber 64 is blocked by the blocking plate 68. Is.

In the center of the upper support member 54, a bearing 54A is formed upright. The outer periphery of the bearing 54A is formed upright with the outer diameter of the upper bearing 54A not crossing the discharge port 69 formed in the upper support member 54 and the recess 72 to which the discharge valve is attached as a thick shape. By making the part other than the part corresponding to the discharge port thick, the rigidity of the bearing is increased, the natural frequency is changed, vibration noise is prevented, and the discharge refrigerant from the discharge port can flow smoothly. Therefore, the silencing effect in the silencing chamber is not hindered. Further, a first discharge silencing chamber 62A formed by the partition plate 65 is formed on the outer periphery of the bearing 54A. A substantially donut-shaped chamber is formed between the outer periphery of the bearing 54A that is erected and the inner periphery of the partition plate 65. A gap, that is, a communication passage 70 is formed. Further, a substantially donut-shaped gap, that is, a discharge passage 71 is also formed between the upper inner periphery of the cover 63 and the outer periphery of the bearing 54A, and the second discharge silencing chamber 62B and the sealed container 12 are communicated with each other. ing. With the above-described configuration, the refrigerant discharged from the second rotary compression element 34 is introduced into the first discharge silencing chamber 62A, is primarily silenced, is discharged into the cover 63 through the communication passage 70, and the second discharge silencing chamber. The secondary sound is muted at 62B. Thereafter, the air is discharged into the sealed container 12 through a substantially donut-shaped discharge passage 71 between the outer periphery of the bearing 54A and the upper inner periphery of the cover 63.

A bearing 56 is formed through the center of the lower support member 56. The bearing 56A has a substantially donut shape with the rotation shaft 16 as a center and a hole through which the rotation shaft 16 passes in the center. Further, an intermediate pressure discharge silencing chamber 64 is provided on the outer periphery of the bearing 56A. On the other hand, the closing plate 68 is formed of a donut-shaped circular steel plate, and is fixed to the lower support member 56 from below with bolts 80 at the peripheral portion. The lower surface opening of the intermediate pressure discharge silencing chamber 64 communicating with the inside of the first cylinder 40 is closed. The bolt 80 is a bolt for assembling the first and second rotary compression elements 32 and 34, and the tip thereof is screwed into the upper support member 54. That is, the upper support member 54 is formed with a screw groove that is screwed with a screw thread formed at the tip of the bolt 80.

Here, a procedure for assembling the rotary compression mechanism unit 18 including the first and second rotary elements 32 and 34 will be described. First, the cover 63, the partition plate 65, the upper support member 54, and the upper cylinder 38 are positioned, and the two upper bolts 78 and 78 that are screwed into the upper cylinder 38 are moved from the cover 63 side (upper side) to the axial direction (lower side). Direction) to integrate them. Thereby, the second rotary compression element 34 is assembled.

Next, the second rotary compression element 34 integrated by the above-described upper bolts 78 and 78 is inserted into the rotary shaft 16 from the upper end side. Next, the intermediate partition plate 36 and the lower cylinder 40 are assembled, inserted into the rotary shaft 16 from the lower end side, positioned with the already attached upper cylinder 38, and screwed into the lower cylinder 40. The upper bolts that are not to be inserted are inserted in the axial direction (downward) from the cover 63 side (upper side) to fix them.

Then, after the lower support member 56 is inserted into the rotary shaft 16 from the lower side, the closing plate 68 is also inserted from the lower end portion into the rotary shaft 16 to close the recessed portion of the lower support member 56, and the four lower bolts 80. Is inserted in the axial direction (upward) from the closing plate 68 side (lower side), and the first and second rotations are made by screwing the tip portions into thread grooves formed in the upper cylinder 38, respectively. The shaft elements 32 and 34 are assembled. In addition, since the 1st and 2nd eccentric parts 42 and 44 are formed in the rotating shaft 16, it cannot attach to the rotating shaft 16 by methods other than the order mentioned above. Therefore, the closing plate 68 is attached to the rotating shaft 16 last.

In this way, the second rotary compression element 34, the intermediate partition plate 36 and the lower cylinder 40, the lower support member 56, and the closing plate 68 are sequentially attached to the rotating shaft 16, and the lower side of the closing plate 68 attached last. Then, the first and second rotary compression elements 32 and 34 can be fixed to the rotary shaft 16 by inserting the four bolts 80 and screwing them into the upper cylinder 38.

  In this case, the above-described carbon dioxide refrigerant (CO2 refrigerant) or hydrocarbon refrigerant (HC refrigerant), which is a natural refrigerant that is friendly to the global environment, is used as the refrigerant, and the oil as the lubricating oil is, for example, mineral oil (mineral oil) ), Existing oils such as alkylbenzene oil, ether oil, ester oil, PAG (polyalkylglycol) are used.

The sleeves 140 and 141 are disposed on the side surfaces of the container main body 12 </ b> A of the sealed container 12 at positions corresponding to the suction passages 58 and 60 of the support member 54 and the lower support member 56, the discharge silencer chamber 64, and the electric element 14. , 142 and 143 are fixed by welding. The sleeves 140 and 141 are adjacent to each other in the vertical direction, and the sleeve 142 is substantially diagonal to the sleeve 141.

  One end of a refrigerant introduction pipe 92 for introducing refrigerant gas into the upper cylinder 38 is inserted and connected into the sleeve 140, and one end of the refrigerant introduction pipe 92 communicates with the suction passage 58 of the upper cylinder 38. The refrigerant introduction pipe 92 passes through the upper portion of the sealed container 12 and reaches the sleeve 142, and the other end is inserted and connected into the sleeve 142 and communicates with the intermediate pressure discharge muffler chamber 64.

Also, one end of a refrigerant introduction pipe 94 for introducing refrigerant gas into the lower cylinder 40 is inserted and connected into the sleeve 141, and one end of the refrigerant introduction pipe communicates with the suction passage 60 of the lower cylinder 40. A refrigerant discharge pipe 96 is inserted and connected into the sleeve 143, and one end of the refrigerant discharge pipe 96 is communicated with the sealed container 12.

Next, the operation of the rotary compressor 10 with the above configuration will be described. When the stator coil 28 of the electric element 14 is energized through the terminal 20 and a wiring (not shown), the electric element 14 is activated and the rotor 24 rotates. By this rotation, the first and second rollers 46 and 48 fitted into the first and second eccentric portions 42 and 44 provided integrally with the rotary shaft 16 are eccentrically rotated in the upper and lower cylinders 38 and 40. .

  Thus, the low pressure (first stage suction pressure is about 4 MPaG) sucked from the suction port 161 to the lower cylinder 40 through the refrigerant introduction pipe 94 and the suction passage 60 formed in the lower support member 56 to the low pressure chamber side. The refrigerant gas is compressed to an intermediate pressure by the operation of the first roller 48 and a vane (not shown). The refrigerant gas having an intermediate pressure is discharged from the high pressure chamber side of the lower cylinder 40 into an intermediate pressure discharge silencer chamber 64 formed in the lower support member 56 via a discharge port (not shown).

The intermediate-pressure refrigerant gas discharged into the intermediate-pressure discharge muffler chamber 64 passes through the refrigerant introduction pipe 92 communicated with the intermediate-pressure discharge muffler chamber 64, and a suction passage 58 formed in the upper support member 54. Through the suction port 160 to the low pressure chamber side of the upper cylinder 38.

The sucked intermediate-pressure refrigerant gas is compressed in the second stage by the operation of the roller 46 and a vane (not shown) to become a high-temperature and high-pressure refrigerant gas (about 12 MPaG). Then, high-temperature and high-pressure refrigerant gas is discharged from the high-pressure chamber side of the upper cylinder 38 to the first discharge silencing chamber 62 </ b> A formed in the upper support member 54 through the discharge port 69.

  Then, the refrigerant discharged to the first discharge silencing chamber 62A is discharged from the communication passage 70 to the second discharge silencing chamber 62B.

Then, the refrigerant discharged into the second discharge silencing chamber 62B is discharged into the sealed container 12 from the discharge passage 71 provided in the cover 63, and then passes through the gap of the electric element 14 to the upper part in the sealed container 12. And is discharged from the refrigerant discharge pipe 96 connected to the upper side of the sealed container 12 to the outside of the rotary compressor 10.

In this way, the outer shape of the upper bearing 54A that does not intersect the discharge port 69 formed in the upper support member and the recess 72 to which the discharge valve is attached is made thick, so that the upper portion of the upper port 54A is changed without changing the position of the discharge port. The rigidity of the bearing part of the support member can be increased and the reliability can be improved, and the natural frequency of the upper support member can be changed to prevent vibration noise and to smoothly flow the refrigerant discharged from the discharge port. Therefore, there are two discharge silencing chambers of the first discharge silencing chamber 62A and the second discharge silencing chamber 62B formed by the outer periphery of the bearing 54A and the partition plate 65 without hindering the silencing effect in the silencing chamber. Thus, noise due to discharge pulsation can also be reduced.

Next, FIGS. 4 to 7 show another embodiment of the present invention, FIG. 4 shows a longitudinal side view of the rotary compressor of the present invention, and FIG. 5 shows an upper support member 54 of the present invention. FIG. 6 is a plan view showing the positional relationship between the upper support member discharge port, the partition plate, and the communication holes of the cover, and FIG. 7 is a plan view of the partition plate 65. The same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted. In the rotary compressor 10 as described in the foregoing embodiment, the partition plate 65 that forms the first discharge silencing chamber 62A together with the upper support member 54 has an outer peripheral shape of the upper support member bearing portion 54 and an inner peripheral shape of the partition plate 65. The clearance between the outer periphery of the bearing and the inner periphery of the partition plate 65 is 0.2 mm or less over the entire periphery, and at least one or more locations communicating with the second discharge silencer chamber 62B are provided on the partition plate 65. A communication hole 66 is provided.

The communication hole 66 provided in the partition plate 65 is provided in a range of ± 45 degrees of a line connecting the center of the bearing hole of the upper support member 54 and the center of the discharge port for discharging the compressed gas. Further, the communication hole 66 provided in the partition plate 65 is provided in a range of Φ2.0 ± 0.5 mm.

Further, the seal portion 54B between the upper support member 54 and the cover 63 has a round shape at the outer periphery of the upper end of the bearing 54A of the upper support member, and the cover 63 is provided with a discharge hole 67 communicating with the inside of the sealed container 12. Further, processing (taper processing, step processing, etc.) for improving the sealing performance is added to the seal portion 54B between the upper and lower support members 54 and the cover 63, and the upper support member seal portion 54B and the cover 63 are press-fitted, and You may seal by O-ring or resin materials, such as PTFE.

The discharge hole 67 provided in the cover 63 is in a range of ± 30 degrees of a line that is orthogonal to a line connecting the bearing center of the upper support member 54 and the center of the communication hole 66 of the partition plate 65 and passes through the bearing center. In addition, two holes are formed so as to face the upper end of the cover. Further, the discharge hole 67 is provided so that one of the holes has a diameter of Φ1.2 ± 0.5 mm and the other hole located in the symmetric direction has a diameter of Φ1.5 ± 0.5 mm.

Thus, the communication passage 70 formed by the outer periphery of the bearing 54A and the inner periphery of the partition plate 65 has the same shape as the shape of the upper support member bearing portion 54A, thereby reducing the gap and improving the effect of the discharge silencing chamber. At the same time, the first discharge silencer chamber is determined by determining the position of the communication hole 66 serving as a communication passage between the partition plate 65 and the cover 63, the communication hole diameter, the position of the discharge hole 67 to the cover 63 and the sealed container 12, and the discharge hole diameter. The noise reduction effect of 62A and the second discharge muffler chamber 62B can be further improved. Moreover, about the hole position and hole diameter provided in the partition plate 65 and the cover 63, the optimal hole position and hole diameter are selected according to various analysis results. Further, by adding processing to the upper bearing tip seal portion 54B, the sealing performance of the cover 63 can be improved, and noise generated by the pulsation of the discharge gas can be effectively reduced.

  In this embodiment, the internal high pressure type rotary compressor 10 provided with the first and second rotary compression elements 32 and 34 is described as the rotary compressor. However, the present invention is not limited to this, and the single cylinder rotary compressor is used. In addition, the present invention may be applied to a rotary compressor having three or more stages of rotating elements. In addition to the internal high-pressure type rotary compressor 10, an internal intermediate pressure type in which the refrigerant compressed by the first rotary compression element is discharged into the sealed container and then compressed by the second rotary compression element, or sealed The present invention may be applied to an internal low-pressure rotary compressor that does not discharge refrigerant into the container.

  In the embodiment, the second rotation compression element 34 provided on the electric element 14 side is the second stage, and the first rotation compression element 32 opposite to the electric element 14 is the first stage, and the first rotation The refrigerant compressed by the compression element 32 is compressed by the second rotary compression element 34. However, the present invention is not limited to this, and the refrigerant compressed by the second rotary compression element is compressed by the first rotary compression element. It does n’t matter.

  Further, in the embodiment of the present invention, a ring-shaped gap is formed in the partition plate 65 and a ring-shaped gap is similarly formed in the cover 63, and the communication hole 66 is formed in the partition plate 65. In the embodiment, the discharge hole 67 is also formed in the cover 63, but a ring-shaped gap may be formed in the partition plate, the discharge hole 67 may be formed in the cover 63, and the communication hole 66 is formed in the partition plate 65. However, a gap may be formed in the cover 63.

In the embodiment, the second rotation compression element 34 provided on the electric element 14 side is the second stage, and the first rotation compression element 32 opposite to the electric element 14 is the first stage, and the first rotation The refrigerant compressed by the compression element 32 is compressed by the second rotary compression element 34. However, the present invention is not limited to this, and the refrigerant compressed by the second rotary compression element is compressed by the first rotary compression element. It does n’t matter.

  In the embodiment, the discharge silencer chamber formed by the upper support member 54 and the cover 63 is divided. However, the discharge silencer chamber formed by the lower support member 56 and the closing plate 68 may be divided. Further, both the upper and lower discharge silencing chambers may be divided and formed.

  Furthermore, in the present embodiment, the rotary shaft is described as a vertical type, but it goes without saying that the present invention is also applicable to a rotary compressor in which the rotary shaft is a horizontal type. Further, carbon dioxide is used as the refrigerant of the rotary compressor, but other refrigerants may be used.

It is a vertical side view of the rotary compressor of Example 1 of the present invention. It is assembly sectional drawing of the upper part supporting member, partition plate, and cover of Example 1 of this invention. It is a top view of the upper support member of Example 1 of the present invention. It is a vertical side view of the rotary compressor of Example 2 of the present invention. It is an assembly sectional view of the upper support member, partition plate, and cover of Example 2 of the present invention. It is a figure which shows the detail of the communicating hole positional relationship of the upper support member discharge port of Example 2 of this invention, a partition plate, and a cover. It is a figure which shows the top view of the upper support member of Example 2 of this invention, and a partition plate single-piece | unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rotary compressor 12 Sealed container 12A Container main body 14 Electric element 16 Rotating shaft 18 Rotation compression mechanism 20 Terminal 22 Stator 24 Rotor 26 Laminated body 28 Stator coil 30 Laminated body 32 1st rotation compression element 34 2nd rotation compression element 38 On Cylinder 40 Lower cylinder 42 Second eccentric portion 44 First eccentric portion 46 Second roller 48 First roller 54 Upper support member 56 Lower support member 54A Upper support member bearing 54B Upper bearing tip seal portion 56A Lower Support member bearing 62A First discharge silence chamber 62B Second discharge silence chamber 63 Cover 64 Intermediate pressure discharge silence chamber 65 Partition plate 66 Partition plate communication hole 67 Cover discharge hole 68 Closure plate 69 Upper support member discharge port 70 Partition plate Communication passage 71 cover discharge passage 72 concave portion 78 for attaching the discharge valve Belt 80 lower bolt

Claims (3)

  In a rotary compressor comprising a drive element provided in a hermetic container and a rotary compression element driven by a rotary shaft connected by the drive element, a cylinder constituting the rotary compression element, and an opening of the cylinder In a compressor comprising: a support member that closes a portion and has a bearing for the rotating shaft; and a cover that is provided on the opposite side of the support member from the cylinder and forms a discharge silencing chamber together with the support member. The discharge port part formed in the member and the upper bearing outer diameter part not intersecting with the recess for attaching the discharge valve are formed in a thick shape, and the seal part between the bearing part of the upper support member and the cover is press-fitted A rotary compressor that is installed. A partition plate is provided for partitioning the discharge silencer chamber formed by the upper support member and the cover into a first discharge silencer chamber and a second discharge silencer chamber, and the inner peripheral shape of the partition plate is defined by the upper support member bearing portion. The rotary compressor according to claim 1, wherein the rotary compressor has the same shape as the outer peripheral shape. 3. The rotary compressor according to claim 1, wherein a seal surface between the upper support member and the cover has a round shape at a tip end portion of the upper bearing of the upper support member to improve sealing performance. .