JPS6073083A - Scroll type compressor - Google Patents

Abstract

PURPOSE:To aim at greatly increasing the lubricating performance of a compressor and as well at reducing the input thereof, by combining a suction port formed in the center section in the lower end face of a rotary shaft, with a part extending from the suction port to the inner surface of a bearing for the lower end of the rotary shaft, so that the lower end part of a centrifugal pump hole is formed. CONSTITUTION:A rotary shaft 160 is formed therein with a hole 164 for pumping up lubrication oil 105 under operation of a centrifugal pump upto an upper small bearing 162. The inlet section of the hole 164 is composed of, in combination, a part 165 having a suction port positioned in the center section in the lower end face of the rotary shaft 160 and extending upward from this port, a part 166 radially extending from the part 165 to the inner surface of a bearing 163, a part 167 extending directly below the part 166 and a part 168 radially extending from the part 167 by a length slightly shorter than the diameter of the rotary shaft 160. With this arrangement the function of the centrifugal pump may be maximumly exhibited to greatly enhance lubrication, and it is possible to aim at reducing sliding losses in sliding sections, reducing the input of the compressor and enhancing the performance thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement of a scroll-type compression device in which a scroll-type compression mechanism is housed in a closed container.

[Background technology of the invention and its problems]

Scroll-type compression devices are conventionally known as low-pressure compression devices. This compression device has a compression mechanism constructed by combining a pair of scroll blades in the axial direction, and has advantages such as small size, high efficiency, and low vibration.

By the way, such a scroll type compression device usually
It is constructed as shown in FIG.

That is, a frame 2 is fixed at a position slightly above the closed container 1 to partition the inside of the closed container 1 in the vertical direction, and a scroll-type compression mechanism is installed above the frame 2! A motor 4 for providing driving power to the scroll type compression mechanism J is arranged below the frame 2, and a lubricating oil 5 is stored in the bottom of the closed container 1.

The scroll type compression mechanism J includes a fixed element 11 and a movable element 12 arranged below the fixed element 11. The fixing element 11 includes a disk-shaped mirror plate 13, an annular wall 14 protruding from the peripheral edge of one side of the mirror plate 13, and a field surrounded by the annular wall 14 that is approximately equal to the annular wall 14. It is composed of a scroll blade 15 projecting from above, a discharge port 16 provided at the center of the end plate 13, and a suction port 17 provided at the peripheral edge of the end plate 13. In the fixing element 1 configured as described above, the peripheral edge of the annular wall 14 is fixed to the upper surface of the frame 2 with the protruding direction of the annular wall 14 and the scroll blades 15 facing downward, and the suction port 17 is fixed to the upper surface of the frame 2. It is connected to a suction pipe 18 that is provided by penetrating the earthen wall of the closed container 1 in an airtight manner. On the other hand, the movable element 12 includes a mirror plate 19 having an outer diameter larger than the inner diameter of the annular wall 14;
It consists of a scroll blade 20 protruding from one surface of the end plate 19 at a height approximately equal to the height of the forward scroll B15, and a cylindrical portion 21 protruding from the center of the other side of the end plate 19. There is. The movable element 12 is arranged so that the scroll blades 20 are arranged in a direction in which the scroll blades 20 protrude upward.
The scroll blades 15 are engaged with each other, and the mirror plate 19 is mounted so that its peripheral portion is in sliding contact with the end face of the annular wall 14, and this mounted state is the Oldham mechanism 31 provided between the mirror plate 19 and the frame 2 described above. is held by.

As shown in FIG. 2, the Oldham mechanism 3 includes keys 32a and 32b fixed on the lower surface of the end plate 19 and located on the same line on both sides of the cylindrical part 21, and seven frames 2. The keys 33m and 33b fixed on the upper surface and on a line perpendicular to the arrangement line of the keys 32a and 32b, and the grooves 34a to 34d into which these keys 33a, 33b, 32a, and 32b are fitted with minute gaps, are vertically inserted. The ring 35 has a ring 35.

Thus, the frame 2 is provided with a bearing hole 41 that is eccentric from the axis of the cylindrical portion 2 and passes through it in the vertical direction. This bearing hole 41 is located on the side of the cylindrical portion 21 (the portion thereof is formed with a large diameter, and the rotating shaft 42 of the above-mentioned /C motor 4 is rotatably supported in the bearing hole 4). There is. A large diameter portion 43 is formed in the rotating shaft 42 at a portion located at the large diameter HB of the bearing hole 41 described above.
A small shaft 44 that fits into the above-mentioned cylindrical portion 2 into this large diameter portion 43
is formed. Note that the rotating shaft 42 is formed in such a length that its lower jaw penetrates into the lubricating oil 5, and inside the rotating shaft 42, the lubricating oil 5 is pumped between the bearing surface, the cylindrical portion 21, and the small shaft 44 by the action of a centrifugal pump. A pumping hole 45 is formed in the fitting part.

In addition, 46 in FIG. 1 indicates a delivery pipe that communicates with the middle part of the closed container 1 in the vertical direction and does not send out high-pressure gas, and 47 indicates a groove that guides high-pressure gas and lubricating oil downward. .

This device compresses gas in the following manner. That is, when the motor 4 is rotated,
The rotational force is transmitted to the movable element 12 via the shaft 42. In this case, since the cylindrical portion 2 of the movable element 12 is eccentric with respect to the shaft 42 and is supported by the Oldham mechanism 3, the movable element 12 performs a turning motion without rotation. Therefore, the scroll blades 20 of the movable element 12 also perform a swirling movement.

Along with this turning movement, the scroll Bls.

As shown in FIGS. 3(a), (b), and (e), the volume of the so-called compression chamber P formed between
The compressor functions as a compression device.

However, the conventional scroll type compression device configured as described above has the following problems. In other words, if this device is installed in an actual refrigeration cycle, the low-pressure refrigerant that has passed through the evaporator will directly flow into the compression chamber P.
It will be introduced within. Therefore, there is a possibility that a liquid return phenomenon may occur. When this liquid return phenomenon occurs, it damages the scroll blades 15, 20. Therefore, in the conventional apparatus, it was necessary to provide a large volume gas-liquid separator between the evaporator and the suction pipe 18. For this reason, there is a problem in that space is required to install the gas-liquid separator, and as a result, the overall size of the device increases. Further, the inside of the closed container 1 is maintained at a pressure of 2, and the motor 4 is installed within this high pressure. As is well known, when gas is compressed to high pressure, this high pressure gas becomes high temperature. Therefore, with the above configuration, special measures are taken to cool the motor 4,
There was also the problem of having to incorporate a large-capacity motor from the beginning to ensure temperature margins. Furthermore, it is difficult to supply lubricating oil to the sliding parts in the compression chamber P, resulting in problems such as seizure of the sliding parts.

Therefore, in order to eliminate such problems, the discharge pipe 46 is used as a suction pipe, and the suction pipe 18 is connected to the space between the earthen wall of the closed container l and the fixing element 1 and used as a discharge pipe.
Still, it is conceivable to suck low-pressure gas into the compression chamber P from the periphery of the sliding contact portion between the fixed element 11 and the movable element 12.

In this way, the lower space inside the closed container 1 can be used as a gas-liquid separator, and low-pressure, low-temperature gas can be transferred to the motor 4.
Furthermore, it is possible to easily supply oil to the sliding parts in the compression chamber P, and the above-mentioned problems can be solved.

However, even with the above configuration, the supply of oil to the sliding parts in the compression chamber P and the cold oil to each sliding part are
It still depends on the delivery performance of the hole that performs the centrifugal bomb f function. Therefore, it is desired that a device with superior centrifugal pump functionality be developed.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and its purpose is to improve lubrication performance, eliminate the risk of seizing on sliding parts, reduce human labor, and improve performance. The object of the present invention is to provide a scroll-type compression device that can be used in various ways.

[Summary of the invention]

The scroll type compression device according to the present invention is characterized by the arrangement of the centrifugal pump hole provided in the rotating shaft of the motor. That is, the lower end of the centrifugal pump hole is configured by a combination of a suction port provided at the center of the lower end surface of the rotating shaft and a portion extending from the suction port to the inner surface of the bearing that supports the lower end of the rotating shaft. It is characterized by what it did.

[Effect of investigation]

With the above configuration, the portion extending from the suction port to the inner surface of the bearing can exhibit the maximum centrifugal pump function of 1M with its shaft diameter. Therefore, the amount of refueling can be increased, thereby reducing the sliding loss of each sliding part and improving the distance between the scroll blades, reducing input and improving performance. It is possible to aim for In addition, since the lower end of the rotating shaft is also supported by a bearing, it is possible to prevent the rumble of the rotating shaft, and this, together with the improvement of pump performance, realizes more rounded operation. I can do it.

[Embodiments of the invention]

Hereinafter, embodiments of the present invention will be described with reference to FIG. 1nj.

In FIG. 4, 70 J id, #1itJ in the figure is a mysteriously formed airtight container, and in the upper part of this airtight container 101 there is a form that partitions the inside of the closed container 101 in the vertical direction. Scroll type compression mechanisms 103 are arranged on three sides of the frame 102, and a drive power is applied to the scroll type compression mechanism (imaginary 103) below the frame 102. The motor 104 for the purpose of
A lubricating oil 105 is stored at the bottom of the #j answerer 10.

The scroll type compression mechanism 103 is similar to the known one,
It is composed of a fixed element 111 and a movable element 112 arranged below the fixed element 111. The fixing element 11 is a mirror plate 11 on a disc.
3, an annular wall 114 protruding from the periphery of one surface of the mirror plate 113, and a scroll R115 protruding from a portion surrounded by the annular wall 114 at approximately the same height as the annular wall 114; The discharge port 116 is provided approximately at the center of the end plate 113. And the annular wall 11
The inner edge of 4 may be a curved surface with an appropriate curvature or a notched surface 1 such as a chi/guji as shown in Figures 5 (a) and (b).
17. Therefore, the fixing element Ill configured as described above has the circumferential edge of the annular wall 114 airtightly attached to the circumferential edge of the upper surface of the frame 102 with the arrow direction of the annular wall 114 and the scroll blades 1i5 facing downward. is fixed. It should be noted that a cap 119 is applied to the upper surface of the fixing element Ill during fixation, and this cap 119 is also fixed IAI integrally by the bolt l18. The cap 119 is formed in a size that can form a gap 120 of a predetermined thickness between the cap 119 and the upper surface of the end plate 113, and has a hole 121 in a part of the wall that forms this gap 120.
is formed. Further, a reservoir hole 122 for guiding lubricating oil, which will be described later, is formed in a part of the side wall.

On the other hand, the movable element 1f2 includes a mirror plate 123 having an outer diameter slightly larger than the inner diameter of the annular wall 114, and a scroll R124 protruding from one 1+i of the mirror plate 123 at a height approximately equal to the height of the scroll blade 115. and a cylindrical portion 125 protruding from the center of the external force of the end plate 123. The peripheral edge of the mirror plate 123 on the side on which the scroll blades 124 protrude is formed into a cutout surface 126 such as a chi-8 surface, as shown in FIGS. 6(a) and 6(b). . And the movable element 112 configured as described above.
The scroll blades 124 and the scroll blades 115 are engaged with each other with the protruding direction of the scroll blades 124 facing upward, and the peripheral portion of the mirror plate 123, the end face of the annular wall 114, the end face of the scroll blades 124, the mirror plate 113, and the scroll blades are interlocked with each other. The end face of the mirror plate 115 and the mirror plate 123 are mounted so as to be in sliding contact with each other, and this mounted state is maintained by an Oldham mechanism 130 provided between the mirror plate 123 and the frame L2.

The Oldham mechanism 2.90 is at the lower peripheral edge of the end plate 123,
In addition, key grooves 131a are provided at two locations on the same line drawn through the center of the mirror plate 123.

131b, and on a line perpendicular to the arrangement direction of the keyways 131a, 131b, and on the upper surface of the frame 102.
Keyways 132a, l provided as shown in the figure
32b, and keys 133a and 133a, which fit into the keys 1318 and 131b on the other hand, as shown in FIG.
3b and the keyway 132a on the other surface.
, 132b, and a ring 135 having keys 134a, 134b that fit into the rings 132b. In fact, as shown in FIG. 8, on both sides of the ring 135, for example, mesh-shaped oil grooves 136 are formed to reduce the sliding resistance. Also, each key of the previous user? 71 J 32
a, l32b, IJl&.

An enlarged step 137 is formed on the inner surface of the key groove 131b to reduce the sliding area with the key, as represented by the key groove 132b in FIG.

Therefore, the frame 102 has the movable element 11
A bearing hole 141 eccentric to the 1Ii11 core line of the cylindrical portion 25 of No. 2 is provided vertically penetrating therethrough, and a portion of the bearing hole 14 located on the cylindrical portion 125 side is formed to have a large diameter. ing. The frame structure on the larger diameter side is specifically constructed as shown in FIG. That is,
The inner diameter of the airtight container 101 on the outermost side? 1 has an equal outer diameter and a circular diameter larger than the inner diameter of the annular wall 114, and an annular wall 142 is formed on the annular wall 114 to which the annular wall 114 is tightened and fixed with a bolt 11B. The annular receiver that receives the peripheral portion of the lower surface of the substrate 123 via the groove 143 (7th and 11j) is formed with the surface 144 generally lowered,
The annular receiver that receives the ring 135 on the inside has a surface 145.
is further lowered by one step, and an annular receiver 146 is formed inside this by further lowering by one step to receive a thrust force reduction mechanism 149, which will be described later. The surface of the pedestal is divided into a plurality of parts in the same direction by i4 J47 provided radially, and at least one of the grooves 747 is provided on the wall of the frame l02 to allow direct communication between the inside and outside. It communicates with hole 148. In addition, the key groove hole 32 a
, l 32 b are formed in the receiver 145. Specifically, the thrust force reduction mechanism 149
As shown in Figures 0 (a), (b), and (c), the annular receiver includes an annular body 50 that is fitted and supported by the annular body 146, and an annular groove 151 carved on the upper surface of this annular body 150. An annular groove 152 that is shallower and narrower than the annular groove 151 formed inside [and outside] the annular groove 151 on the upper surface.
．． 153 and these annular grooves 152.1 s per 153 yen
The seal rings 154 and 155 are made of, for example, tetrafluoroethylene and are mounted so as not to protrude outward, respectively. At the lower end of the outer peripheral surface of the seal ring 154, a groove i4 and 156 is formed as shown in FIG. Even now that the taper is formed,
At four positions in the circumferential direction of the groove 151, the groove 151 is connected to the annular groove 152°1 with the same depth as the groove 151.
A bottomed hole 157 communicating with 53 is formed. Inside the mirror plate 23, a thrust force reduction mechanism 14 is provided.
9 is attached as shown in FIG. 4, the annular body 151, the seal ring i54.
Holes 158, 159 that allow the space Q separated by the lower surface of 23 to always communicate with the medium pressure ports S, S' of the compression chamber P.
is formed.

Thus, the rotating shaft 160 of the fMfJ motor 104 is rotatably supported in the hole 14 of the fefJ frame 102. The rotating shaft 160 has a bearing hole 1410.
A large diameter portion 161 is formed in a portion located at the large diameter portion, and a small shaft 162 that fits into the aforementioned cylindrical portion 125 is protruded from this large diameter portion 161. Then, the rotating shaft 16
0 has a length such that its lower end penetrates into the lubricating oil 105, and its lower end is supported by a lower bearing 163 supported inwardly of the closed container 10 via a support member 200. Is there a centrifugal number inside the rotating shaft 160? The lubricating oil 105 is applied to the bearing surface, small shaft 162 and cylindrical part 12 by
A pumping hole 164 is formed in the fitting portion with 5.

Shape 1 of 5 minutes located at the entrance of this hole 164, that is, the lower end of the rotating shaft 160. 1: A suction port is placed in the center of the lower end surface of the rotating shaft 160, and a portion 165 extends upward from the suction port, and a portion 1ifa extends from this portion 165 in the radial direction to the inner surface of the bearing 163.

166, a portion 167 extending upward from this portion 166, and a portion 16B extending radially from this portion 167 by a length slightly shorter than the diameter of the rotating shaft 160. . The upper end 164a of the hole 164 is provided at an eccentric position within the small hole 162.

Therefore, the motor 04 has a ratchet type reversal prevention mechanism 1 between the cage-shaped guide and the frame 102.
74 is provided, and a shoulder bottom hole 175 is provided on the inner surface side of this 173 facing in the direction of the center line of the rotating shaft, and this bottomed hole 17
A stopper rod 176 is slidably accommodated in the hole 175, and a force is applied between the rod 176 and the inner surface of the bottom wall of the bottomed hole 175 in a direction that causes the rod 176 to protrude from the bottomed hole 175. A spring 177 is provided, and a claw-shaped notch 17B is further provided on the outer surface of the frame 102 on which the tip of the rod 176 slides.

Therefore, the scroll type compression mechanism 103 and the motor 104 are connected to a portion of the side wall of the closed container 101 that is located between the scroll type compression mechanism 103 and the motor 104.
4 and a suction pipe 181 in communication with the space 180 of mountain 1.
is connected to the upper wall of the airtight container 101.
A discharge pipe 183 is connected in communication with a space 182 formed between this upper wall and the fixing element 11.

In addition, 184 in FIG. 4 is an annular wall 1 for returning the lubricating oil pushed out into the space 182 downward through the frame 102.
14 and the holes provided in the frame 102 are shown, and 18
5 indicates a balance weight, 186 indicates a connection mechanism for power supply to the motor 104, and 187il-i indicates a reservoir hole through which lubricating oil passes.

Next, the operation of the compression device configured as shown above will be explained.

First, when power is supplied to the motor 104, the rotating shaft 160 starts rotating, and this rotational force is transmitted to the movable element 112.

In this case, the cylindrical portion 125 of the movable baron 112 is connected to the rotating shaft 160.
Since the movable element 112 is fitted with a small shaft 162 provided eccentrically with respect to the movable element 112 and is supported by the Oldham mechanism 130, the movable element 112 performs a turning motion without rotation. Therefore, the scroll blades 124 provided on the movable element 112 also perform a swirling motion. Along with this swirling movement, the size of the compression chamber P formed between the scroll blade 115 and the scroll blade 124 becomes smaller periodically as shown in FIG. is discharged from discharge D 116. The discharged high pressure gas is sent out from the discharge pipe 183 through a gap 120 formed by the cap 119, a hole 121 provided in the cap 119, and a space 182. On the other hand, when the movable element 112 pivots as described above, the upper surface periphery of the base plate 123 of the movable element 112 and the annular wall 11 of the fixed element 111
The fact that the notches 126 and 117 are formed in the inner end edge of the frame 102 effectively acts so that the peripheral edge of the compression point P is always connected to the annular shape i) $ 14.9 formed in the frame 102. The state is as follows. The annular groove 43 is connected to the frame 1.
Hole 14B through grooves 147 etc. provided radially in 02
Unfortunately, this hole 148 communicates with the suction pipe 181 through the space 180, so the low-pressure gas ends up passing through the suction pipe 1B1 to the raw space 180 to the hole 148 to the groove 147 and the annular groove 143. Then, it is sucked into the low pressure port in the compression 'ff1P, where it functions as a compression device. In this case, even if liquid such as a refrigerant is mixed in the low-pressure gas that has flowed in through the suction pipe 181, this liquid will fall downward while moving within the space 80, causing υ] slippage. It is about to move to the bottom of the tank 101 where the oil 105 is stored. Note that since the motor 104 generates heat by itself, the fallen liquid is gasified by the heat,
It mixes with the flow of the already gasified material and moves into the compression chamber P. Therefore, the space 180 has exactly the same function as a gas distribution vessel, and the existence of this chamber 180, that is, the existence of such a gas flow path, prevents damage to the scroll blades 115 and 124. Ru.

On the other hand, when the motor 104 rotates as described above, a portion of the seven-slur oil 105 is pumped upward into the hole 164 by the centrifugal pump action due to the shape of the hole 164. This pumped up lubricating oil lubricates the inner peripheral surface of the bearing hole 141, then lubricates the fitting part between the small shaft 162 and the cylindrical part 125, and then passes through the hole 187 to the Oldham mechanism ls o 7).
: Clean the provided part, and then part of the hole 14
The residue flows downward from B, enters the pressure system chamber P, and lubricates the sliding parts in the pressure system chamber P.

The lubricating oil that has entered the pressurization chamber P is finally discharged from the discharge hole 116, and then flows downward through the hole 122 and the hole 184 provided in the cap 119. Therefore, heavy pressure gas without lubricating oil is discharged from the discharge pipe 183.

In addition, as described above, when the oJ dynamic element 112 performs a turning motion and performs a compression operation, the pressure inside the compression chamber P becomes high, so that the oJ dynamic element 112 is forced downward. f: Receptacle, this force is applied to the receiving surface 144, large diameter portion 161, etc. of the Oldham mechanism 13o1 frame 102, and there is a possibility that powder and cracking phenomenon may occur in these elements. However, in the case of this embodiment, the thrust force reduction mechanism 149 prevents the occurrence of the seizure phenomenon in the following manner. That is, the annular body 150 of the thrust force reduction mechanism 149. ring ring 154,
155. and an annular space Q&'' which is quadrupled with mirror plates 123.
-1 always via the so-called medium pressure port S of the compression chamber P via the holes 158, 159.

It leads to S'. Therefore, the cotton plate 123 receives an upward force due to the gas pressure within the annular groove, and depending on this force, the downward force applied to the first plug plate 123 is reduced. Therefore, the occurrence of the burning phenomenon is prevented by this sanity. Furthermore, Isamu mjl '7
The downward force applied to the element 112 is the compressor lung, the position of the space)
- It pulsates as it changes. For this reason, there is a flow of high-pressure gas from the thrust force reduction mechanism 149 to the low-pressure side, but in this embodiment, as shown in FIG. A bottomed hole 5 that communicates with the block grooves 152 and 153 in which the
7, a force that presses the brim seal rings 154, 155 against the lower surface of the mirror plate 123 is always applied to the seal rings 154, 155 as shown by the solid line arrows in FIG. 10(e). Therefore, this push-in prevents the high-pressure gas from flowing out.

Furthermore, when the motor 104 is stopped, there is a possibility that the pressure difference between the space 182 and the space 180 will cause the pump 112 to rotate backwards, causing high pressure gas to flow into the low pressure side. However, in the case of this embodiment, since a ratchet-type reversal prevention mechanism 174 is provided, the occurrence of reverse rotation is reliably prevented.
High pressure gas leakage is prevented.

In this way, the lowermost end of the hole 164 that exerts the centrifugal pump function is connected to the shaft S part 165 whose suction port is located in the middle part of the lower end surface of the rotating shaft 160, and the bearing 163 in the radial direction from this part 165. It is configured in combination with a portion 166 that extends to the inner surface.

Therefore, portion 166 will provide the maximum centrifugal pumping function available with this shaft diameter.

It is possible to pump up a large amount of lubricating oil, and this allows the scroll blades 11 that make up the compression chamber P to smoothly slide each mass and moving part.
5.124 can be well sealed. Also,
The presence of the bearing 163 makes the rotating shaft 160 more stable.
Moreover, it can be supported and moved smoothly, and the above-mentioned effects can be obtained after all.

[Brief explanation of drawings]

Figure 1 shows the conventional equipment for this building.
Figure 2 shows an explanatory diagram of the Oldham mechanism incorporated into the device.
FIG. 3 is a diagram for explaining the compression principle of the same device, FIG. ) is a bottom view of the fixing element in the same device, and (b) is the A-A in (a).
6(a) is a cross-sectional view of the setup +1 condition when cut purely at the center and viewed in the direction of the arrow; FIG.
The same figure (b) is a BB line cut arrow view in (a), the seventh
The figure is a partially cutaway exploded perspective view showing only the upper part of the frame of the device, Figure 8 is a top view of the Oldham machine Diagram for explaining the shape of the keyway, No. 10
Figure (a) is a top view of the thrust force reduction mechanism incorporated in the device, figure (b) is a view taken along the line C-C in (a), and figure (e) is a seal incorporated in the mechanism. FIG. 11, which is a diagram for explaining the shape of the ring, is a view taken along the line DD in FIG. 4. 101... airtight container, 102... frame, melt
...Scroll type compression mechanism, 104...Motor, 10
5... Lubricating oil, 111...1^ [Constant element, 112...
・oj moving element, 115, 124...scroll cumulative, 1
16...Discharge port, 130...Oldham mechanism, 14)
... Bearing hole, 143 ... Massive groove, 147 ... Groove, 1
48... Hole, 149... Thrust force reduction mechanism, 16
0... Rotating shaft, 164... Hole for centrifugal pump, 17
0... Rotor, 171... Stator, 174... Reversal prevention mechanism, 180, 182... Space, 181... Suction pipe, 183... Discharge pipe. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 '11 331) Figure 5 (a) (b) Figure 6 (a) (b) 23 Figure 7, 8゜ 1 dream''GO- 73083 (10) Figure 9 Figure 10 (a) (b) (c) Figure 11

Claims (1)

[Claims] A scroll-type compression mechanism consisting of a fixed element and a movable element, each of which is joined in the axial direction to form a compression chamber therebetween, and each of which has scroll blades that engage with each other within the compression chamber. is housed in an airtight container with the fixed element on the upper side and the movable element on the lower side, and the movable element is rotated without rotation by the power of a motor provided at the lower part of the airtight container. The gas is compressed by the movement of the motor, and the suction port is located at the lower end surface of the rotary shaft of the motor through a centrifugal pump hole provided in the rotary shaft to the bottom of the closed container. In a scroll type compression device that pumps up lubricating oil contained therein to supply oil to each sliding part, the lower end of the centrifugal pump hole is connected to a suction port formed at the center of the lower end surface of the rotating shaft; A scroll type compression device comprising a portion extending from the suction port to the inner surface of a bearing that supports the lower end of the rotating shaft.