JP3485638B2 - Horizontal scroll compressor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor used in, for example, an air conditioner or a refrigerator, and more particularly to a structure for supplying lubricating oil to a sliding portion in a closed container of the scroll compressor.

[0002]

BACKGROUND ART Figure the structure of a conventional horizontal type scroll compressor
6 shows. In this horizontal scroll compressor, a drive shaft 3 is horizontally supported in a closed container 1. The drive shaft 3 is rotationally driven by the electric element 5. That is, the electric element 5 is
An electromagnetic force acts on the rotor 7 provided around the drive shaft 3 between the rotor 7 and the stator 9 provided on the sealed container 1 side, and the rotor 7 and the drive shaft 3 are rotationally driven. By this rotation, the scroll compression element 11 works and compresses the gas 12. That is, the scroll compression element 11 is the closed container 1
Is divided into a high pressure chamber 13 and a low pressure chamber 15. Then, the gas 12 sucked into the low pressure chamber 15 from the suction port 17 is compressed,
Discharge from the discharge port 19 to the outside through the high pressure chamber 13. An oil supply mechanism 21 is provided at the right end of the drive shaft 3 in the figure, and sucks up the lubricating oil 23 collected at the bottom of the closed container 1 to drive the drive shaft 3
Lubricating oil 23 is supplied to the sliding parts existing around and around.

[0003]

However, in the horizontal scroll compressor, the electric element 5 and the scroll compression element 11 are arranged along the drive shaft 3 which is horizontally supported in the closed container 1.
Etc. are provided and driven to rotate. The lubricating oil 23 cannot be stored up to the height of these rotary drive parts. This is because otherwise, a large amount of the lubricating oil 23 mixed by the rotary drive portion is mixed with the gas 12, and the lubricating oil 23 is discharged. Further, the lubricating oil 23 supplied to the sliding portion is mixed with the gas 12 to some extent, and is discharged from the discharge port 19 together with the gas 12. For these reasons, the amount of the lubricating oil 23 cannot be secured sufficiently and the oil level cannot be kept high, so the supply of the lubricating oil 23 by the oil supply mechanism 21 becomes insufficient, and in extreme cases, the sliding part is damaged. To do. The present invention has been made to solve the above problems, and a horizontal scroll compression that secures a sufficient amount of lubricating oil, keeps the oil level high, and can sufficiently supply lubricating oil by an oil supply mechanism. The purpose is to provide a machine.

[0004]

In order to achieve the above-mentioned object, the invention of claim 1 supports in a sealed container in a horizontal position.
The driven element drives the driven element to rotate, and this rotation causes
To divide the closed container into a high pressure chamber and a low pressure chamber.
The compression element works to compress the gas drawn into the low pressure chamber.
And discharge it through the high pressure chamber to the bottom of the closed container.
Lubricating oil is sucked up by the oil supply mechanism and supplied to sliding parts
In a horizontal scroll compressor used in
With multiple holes that create a pressure drop in the flow of
Partition by partition, in the room on the gas flow downstream side of the partition
The lubrication mechanism is provided, and the sliding part is located below the partition plate.
A plurality of holes are formed to form an oil return passage for returning the dropped lubricating oil.
In some of the holes, the pressure difference on both sides of
Horizontal scroll compression with a valve that opens at the top
It is a machine.

According to a second aspect of the invention, the apparatus is placed horizontally in a closed container.
The electric element rotates the drive shaft supported by
The closed container is divided into a high-pressure chamber and a low-pressure chamber by rolling.
Gas drawn into the low-pressure chamber by operating the scroll compression element
Compressed and discharged through a high-pressure chamber to the outside,
The lubricating oil at the bottom of the
In a horizontal scroll compressor supplied to
The mechanism is installed in a room that is separated from other parts, and next to this room
Install a filter near the gas inlet at the contact position.
And the cross section of the gas flow path is on the downstream side across this filter.
A step portion that expands toward the
From the pressure guiding path that guides the low pressure from the low pressure part of the vortex and the sliding part
The lower oil return passage for returning the dropped lubricating oil to the room
It is an open horizontal scroll compressor.

According to a third aspect of the invention, the main gas flow from the suction port
The filter should be installed at a right angle to the
The gas passage through which the side gas flow generated along the luther passes
The horizontal scroll according to claim 3, wherein the horizontal scroll is provided along the side gas stream.
It is a compressor.

[0015]

In the first aspect of the invention, the compressed gas is separated by the partition.
The passage resistance causes a pressure drop when passing through the holes in the plate.
The pressure in the room on the downstream side of the gas flow of the partition plate becomes low. This
This keeps the lubricating oil level in this room high.
Wear. When the gas flow rate is small, the pressure drop is small.
The valve is closed because the differential pressure on both sides of the punch is small.
It remains open, and therefore it is a partition compared to the case without a valve
It is possible to increase the differential pressure between the two sides of the plate, which is the amount that can be increased.
You can keep the oil level high. If the gas flow rate is high, the partition plate
The valve opens because the differential pressure on both sides increases. By this
Therefore, the number of open holes increases and the differential pressure is reduced.
it can. In other words, reducing this differential pressure is
The passage resistance of the hole in the cutting plate is larger than necessary.
Is to prevent the
To prevent it from affecting the performance.

In the invention of claim 2 or 3, the filter
The low pressure from the low pressure part of the gas vortex generated at the step of the
Guided to the room where the mechanism was installed, the pressure in this room was lowered
Then, keep the oil level of the lubricating oil returning from the oil return passage to this room high.
One.

According to the invention of claim 3, in addition to the above-mentioned action,
In addition, if the filter is
Since a sidestream of the gas flows into the closed container, all gas
The flow does not have to pass through a clogged filter. at the same time,
Harmful dust such as iron powder has a heavy specific gravity
Fully supplemented by filters to ride the stream.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment according to the invention of claim 1 will be described .
1 to 3 will be described. A drive shaft 3 is supported in a horizontal position at the approximate center of the closed container 1. This support is
It is performed by a support frame 25 fixed to the inner peripheral surface of the closed container 1 and a shaft support element 27 at both left and right ends of the drive shaft 3. The drive shaft 3 is rotationally driven by the electric element 5. In the electric element 5, an electromagnetic force acts between the rotor 7 fixed around the drive shaft 3 and the stator 9 fixed on the inner peripheral surface side of the closed casing 1 to generate a driving force. Drive shaft 3
A scroll compression element 11 is provided at one end of the drive shaft 3, and compresses gas by rotation of the drive shaft 3.

The scroll compression element 11 divides the closed container 1 into a high pressure chamber 13 and a low pressure chamber 15. The scroll compression element 11 is composed of a fixed scroll 29 and an orbiting scroll 31. The spiral wrap 35 protruding from the end plate 33 of the orbiting scroll 31 is meshed with the spiral wrap 35 protruding from the end plate 33 of the fixed scroll 29. Due to this meshing, a compression chamber is formed that is composed of a plurality of compression spaces 41 that are gradually reduced from the spiral outside toward the inside. Further, due to the function of the Oldham's joint 43, the orbiting scroll 31 revolves on a circular orbit so as not to rotate with respect to the fixed scroll 29. An oil supply mechanism 21 is provided at the other end of the drive shaft 3, and sucks up the lubricating oil 23 at the bottom via a suction pipe 45. The sucked lubricating oil 23 passes through an oil supply passage 47 formed in the drive shaft 3 between each sliding portion, that is, between the drive shaft 3 and the shaft support element 27, and between the drive shaft 3 and the Oldham coupling 43. And between the drive shaft 3 and the support frame 25.

A discharge port 19 is provided on the upper right side of the closed container 1. A suction port 17 is provided at the upper part of the left end, and guides the gas 12 to the gas suction portion 49 existing on the outer circumference of the scroll compression element 11. The gas 12 compressed in this embodiment is a refrigerant gas.

Now, inside the closed container 1, the electric element 5
An oil separation element 51 is provided between the rotor 7 and the shaft support element 27. The oil separating element 51 is a baffle plate having a large number of small holes or a fine net (demister) knitted with fibrous metal wires. The inside of the closed container 1 is divided by the oil separation element 51, and the compressed gas 12 always passes through the oil separation element 51 and is discharged. In addition, 53 in FIG. 1 (B) is a gas passage,
55 is a hexagon socket head cap screw.

The operation of this embodiment will be described below. The gas 12 from the outside is guided to the gas suction portion 49 on the outer circumference of the scroll compression element 11 through the suction port 17 and is compressed. The compressed gas 12 passes through the inside of the closed container 1 in which the electric element 5 and the like are stored. At this time,
Lubricating oil 23 stirred by the rotor 7 of the electric element 5
Mixes with gas 12. Further, the compressed space 4 is supplied to the sliding portion between the fixed scroll 29 and the orbiting scroll 31.
The lubricating oil 23 for sealing 1 also mixes with the gas 12.
However, the lubricating oil 23 mixed with the gas 12 is captured by the oil separation element 51, separated, and drops to the bottom of the closed container 1. The compressed gas 12 from which the lubricating oil 23 is separated in this way is discharged from the discharge port 19 to the outside.

Therefore, the amount of the lubricating oil 23 discharged to the outside is reduced, and the oil level of the lubricating oil 23 near the oil supply mechanism 21 can be kept high. Therefore, the oil supply mechanism 21 can easily suck up the lubricating oil 23 and can sufficiently supply the lubricating oil to the sliding portion. As a result, it is possible to prevent the sliding portion from being damaged, and it is possible to sufficiently seal between the fixed scroll 29 and the orbiting scroll 31.

Further, since the lubricating oil 23 mixed with the gas 12 is not discharged, the lubricating oil 23 mixed with the refrigerant gas which is the gas 12 is brought into a condenser or an evaporator (not shown),
It is possible to reduce contamination of these heat transfer surfaces and impede heat transfer efficiency.

Further, by providing the oil separating element 51 in the closed container 1, it is not necessary to newly install another oil separator (not shown) on the downstream side of the discharge port 12. Therefore, the size of the device can be reduced by the space of the other oil separator.

Further, by providing the oil separation element 51, a pressure drop occurs in the gas flow passing through the oil separation element 51,
Since the pressure in the vicinity of the oil supply mechanism 21 can be lowered, the oil supply mechanism 2
The oil level of the lubricating oil 23 below 1 can be kept higher.

The discharge port 19 is provided at the right end of the closed container 1, and the suction port is provided at the left end (not shown) of the closed container 1. The electric element 5 and the like are located in the high pressure chamber 13 of the closed container 1. The shaft support element 27 that supports the right end of the drive shaft 3 also serves as a partition plate 95 and partitions the right end of the high pressure chamber 13 in the figure. The oil supply mechanism 21 is provided in the partitioned room 97, that is, the room 97 on the downstream side of the partition plate 95 in the gas flow.

A plurality of holes are formed in the partition plate 95. Some holes 99 of the plurality of holes are
A valve 101 is attached. A hole (not shown) to which the valve 101 is not attached is used for gas 1
2 has a function of causing a pressure drop in the flow of gas 12. Due to this pressure drop, the partition plate 95
The valve 101 is adjusted so that the valve 101 opens when the pressure difference generated on both sides of the valve becomes close to 0.1 kg / square cm. The valve 101 is a leaf spring fixed by a bolt 103, and the tip of the leaf spring is normally the hole 9
9 is closed. An oil return passage 105 is formed below the partition plate 95.

The operation of this embodiment will be described below. The gas 12 sucked from a suction port (not shown) is sucked into the scroll compression element 11 through the low pressure chamber 15, and the high pressure chamber 13
Is discharged to the side. The flow of gas flowing in the high pressure chamber 13 is
When passing through the hole (not shown) of the partition plate 95, a pressure drop occurs due to the passage resistance of the hole. Due to the pressure drop, the pressure in the room 97 on the gas flow downstream side of the partition plate 95 becomes lower than that in the room where the electric element 5 is located. Therefore, when the lubricating oil 23 that has dropped from the sliding portion returns to the chamber 97 through the oil return passage 105, the oil level is kept high. As a result, the lubricating oil 23 by the oil supply mechanism 21 provided in the room 97
Is sufficiently sucked, the lubricating oil 23 can be sufficiently supplied to the sliding portion, and damage to the sliding portion can be prevented.

Now, when the gas flow rate through the hole (not shown) is small, the valve 101 is closed and a sufficient passage resistance is obtained as compared with the case where there is no valve, and the difference between both sides sandwiching the partition plate 95 is obtained. The pressure can be increased and the oil level in the room 97 is kept high enough. On the other hand, when the gas flow rate through the hole becomes large, the passage resistance becomes unnecessarily large and the differential pressure between the both sides of the partition plate 95 becomes a certain value or more, so that the valve 101 opens. Valve 10
When 1 is opened, the number of open holes increases and the passage resistance decreases, so that the differential pressure decreases. Eventually, the gas flow rate is less affected and the differential pressure is kept within a certain range.
As a result, the oil level in the room is maintained at an appropriate constant height. Also, when the gas flow rate is large like this, the valve 1
When 01 is opened, it is possible to prevent the passage resistance from becoming unnecessarily large and not to impair the performance of the compressor.
The size of this hole (not shown) is set according to the case where the gas flow rate is small.

[0055]

An embodiment according to claims 2 and 3 is shown in FIG.
And shown in FIG. The same parts as those in the above embodiment are designated by the same reference numerals. The oil supply mechanism 21 provided at the right end of the drive shaft 3 is provided in a room 97 that is partitioned from the other parts by a partition plate 95. The partition plate 95 also serves as the shaft support element 27 that supports the right end of the drive shaft 3. This room 9
The wing 111 is provided on the drive shaft 3 at a position adjacent to 7. That is, it is provided at the right end of the right end ring 112 of the rotor 7 fixed to the drive shaft 3. This feather 11
As shown in FIG. 4 (B) , No. 1 rotates clockwise so that the gas 12 flows outward from the center of the wing 111. The central portion of the wing 111 is a low pressure portion.
Pressure guiding paths 113 and 115 (FIG. 5) for guiding the low pressure of the low pressure portion to the chamber 97 are provided. That is, the pivot element 27
The bearing portion 117 of the wing 1 is used to provide the first pressure guiding path 113 on one side of the bearing portion 117.
11 is opened in the central part. Also, bearing part 1
A second pressure guiding passage 115 is provided on the other side of
Open to the side. These two pressure guiding paths 113 and 115 guide the low pressure due to the wing. An oil return passage 105 is formed below the partition plate 95. That is, the lubricating oil that has dropped from the sliding portion of the drive shaft 3 into the low pressure chamber 15 returns to the chamber 97 through the oil return passage 105.

A gas suction port 17 is provided at a position adjacent to the room 97. A suction filter chamber 119 is formed continuously with the suction port 17. In the suction filter chamber 119, the inhaled gas 12
A filter 121 for removing impurities from the filter is attached. The flow path 12 through which the gas of this filter 121 flows
The flow passage 127 cross section of the mounting flange 125 that supports the lower surface of the filter 121 is larger than the three cross sections. That is, a step portion in which the cross section of the gas flow path expands toward the downstream side of the gas flow is formed across the filter 121, and vortices are generated in the gas flow. Further, a pressure guiding path 129 is formed on the mounting flange 125. The pressure guiding path 129 is for guiding low pressure to the chamber 97 from the low pressure portion of the gas swirl 131 generated at the step. Since the gas vortex 131 is generated at the pole, the diameter of the pressure guiding path 129 needs to be 5 mm or less, for example. Further, the filter 121 is mounted at a right angle to the main gas stream 12A which goes straight downward from the suction port 17. Further, another gas passage 133 is provided along the filter 121 so that the gas side stream 12B perpendicular to the gas main stream 12A passes. That is, the gas passage 133 is composed of a hole 135 formed in the side surface of the suction filter chamber 119 and a cutout portion 137 formed in a rib on the inner peripheral surface of the closed container 1 continuous with the hole 135.

The operation of this embodiment will be described below. When the drive shaft 3 rotates, the oil supply mechanism 21 operates, and at the same time, the blade 11
1 produces a gas flow from the center outward. Due to this gas flow, the central portion of the wing 111 becomes a low pressure portion. The lubricating oil 23 supplied to each sliding portion by the oil supply mechanism 21 falls from this sliding portion and is received by the bottom of the low pressure chamber 15.
The received lubricating oil 23 is supplied to the oil return passage 10 of the partition plate 95.
Room 97 divided by partition plate 95 through 5
Return to. A low pressure is introduced into the chamber 97 by pressure guiding paths 113 and 115 from a low pressure portion generated by the rotation of the wing 111. Further, when the gas 12 is sucked in through the suction port 17, the cross section of the gas flow path suddenly expands at the stepped portion of the filter 121 (see 123 and 127 in FIG. 5 ) .
31 is formed. This gas swirl 131 becomes a low pressure. Then, a low pressure is introduced into the chamber 97 from the low pressure portion of the gas swirl 131 generated in the step portion by another pressure guiding path 129. Therefore, the pressure in the chamber 97 becomes lower than the pressure in the adjacent low pressure chamber 15. Therefore, the oil level of the lubricating oil 23 in the chamber 97 is maintained high. Therefore, the oil supply mechanism 21 can sufficiently supply the lubricating oil 23 and prevent the sliding portion from being damaged.

Conventionally, the oil level was sometimes controlled by utilizing the pressure of the discharge gas, but the stability of the oil level was poor because the pressure of the discharge gas changed depending on the pressure condition and the degree of superheat. . On the other hand, in this embodiment, the low pressure of the gas vortex 131 generated by the suction gas is used, or the low pressure generated by the blade 111 provided on the rotating drive shaft 3 is used, and these low pressures are constant. Therefore, there is no instability as in the conventional example. If the filter 121 is not clogged, the main gas stream 1 flowing directly from the suction port 17
2A all pass through the filter 121. At this time, since the filter 121 is not clogged, the gas main stream 12
The pressure loss of A is small. Next, when the filter 121 is clogged, the main gas stream 12A collides with the filter 121 and a side gas stream 12B is generated. This gas sidestream 12B
Is generated along the filter 121, and the gas main stream 12A
At a right angle to. This gas sidestream 12B is a filter 12
1 flows through the gas passage 133 and flows into the inside of the closed container 1. Therefore, it is possible to prevent all gas flow from passing through the clogged filter 121, and prevent a large pressure loss from occurring. Harmful dust such as iron powder contained in the inhaled gas 12 has a high specific gravity and can be sufficiently captured by the filter 121 along the main stream of the gas. Therefore, the problem caused by the gas sidestream 12B is small.

[0061]

As described above, these inventions have the following effects. First, according to the invention of claim 1, a pressure drop occurs in the gas flow due to the function of the holes of the partition plate, and the pressure of the room on the gas flow downstream side of the partition plate is reduced, so that the lubricating oil The oil level can be kept high, the supply of lubricating oil by the oil supply mechanism provided in this room can be made sufficient, and damage to the sliding parts can be prevented. At the same time, when the gas flow rate becomes large, the valves attached to some of the holes open,
Unnecessarily large passage resistance due to the holes can be eliminated to prevent the performance of the compressor from being hindered.

According to the second or third aspect of the present invention, the low pressure generated by the low pressure of the gas vortex is introduced, so that the oil level in the room in which the oil supply mechanism is installed is kept high and sufficient lubricating oil is supplied. It is possible to prevent the sliding part from being damaged.

According to the invention of claim 3, in addition to the above effect, it is possible to prevent the pressure loss from increasing due to the clogged filter.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment according to the invention of claim 1. (A) is a vertical sectional view showing the whole (B) is a BB sectional view of (A).

FIG. 2 is an overall vertical sectional view showing an embodiment according to the invention of claim 1.

FIG. 3A is an enlarged view showing a main part of FIG. (B) is a front view of (A).

FIG. 4 is a view showing an embodiment according to the invention of claim 2 or claim 3 (A) is an overall longitudinal sectional view (B) is a sectional view taken along line BB of (A).

5 is an enlarged view of a main part of FIG. 4 (A).

FIG. 6 is an overall vertical sectional view showing a conventional example.

[Simple explanation of symbols]

1 closed container 3 drive axis 5 electric elements 7 rotor 9 stator 11 scroll compression element 12 gas 13 High pressure chamber 15 Low pressure chamber 17 Inlet 19 outlets 21 Lubrication mechanism 23 Lubricating oil 25 Support frame 27 Shaft support element 29 Fixed scroll 31 rocking scroll 33, 37 End plate 35, 39 laps 41 Compressed space 43 Oldham coupling 45 suction pipe 47 Oil supply path 49 Gas suction part 51 oil separation element 53 gas passage 55 Hexagon nut 57 Discharge port 59, 61 Oil passage 63 Float type oil flow rate control mechanism 65 float 67 Needle valve 69 arm 71 pin 73 fingers 75 oil separation element 79 holes 77 Partition board 79 holes 81 cover 83 First supply passage 85 Squeeze 87 Second supply passage 89 Capillary tube 91 Solenoid valve 93 pipe 95 partition boards 97 rooms 99 holes 101 valve 103 volts 105 Oil return passage 107, 109 Pressure guide path 111 birds

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsutoshi Tsuchiya 2-5-5 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Yoshinori Tobi, 2-5 Keihan Hondori, Moriguchi City, Osaka Prefecture No. 5 Sanyo Denki Co., Ltd. (72) Inventor Toshiyuki Ehara 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Denki Co., Ltd. (56) Reference Japanese Patent Laid-Open No. 5-133375 (JP, A) Kaihei 5-248374 (JP, A) JP 61-205386 (JP, A) JP 5-126072 (JP, A) JP 6-66275 (JP, A) JP 5-288171 ( JP, A) JP 6-26473 (JP, A) JP 62-113880 (JP, A) Actual opening 61-103592 (JP, U) Actual opening Flat 5-38383 (JP, U) Actual opening 55-88095 (JP, U) Actual development 63-82080 (JP, U) (58) Field (Int.Cl. ^7, DB name) F04C 18/02 311 F04C 29/02 311

Claims (3)

(57) [Claims] 1. A drive shaft horizontally supported in a closed container.
The electric element is driven to rotate, and this rotation causes the sealed
Scroll compression element that divides the container into a high pressure chamber and a low pressure chamber
The high pressure chamber by compressing the gas sucked into the low pressure chamber.
To the outside and supply the lubricating oil at the bottom of the closed container.
A horizontal type sleeve that is sucked up by an oil mechanism and supplied to sliding parts.
In a Kroll compressor, a high pressure chamber is defined by multiple holes that create a pressure drop in the gas flow.
Partition by the partition plate formed with, the gas flow of the partition plate
The above refueling mechanism was installed in the room on the downstream side, and it was installed below the partition plate.
Forms an oil return passage for returning the lubricating oil dropped from the sliding part
However, some of the holes are not
Side with a valve that opens when the differential pressure on the side exceeds a certain level
Type scroll compressor. 2. A drive shaft laterally supported in a closed container.
The electric element is driven to rotate, and this rotation causes the sealed
Scroll compression element that divides the container into a high pressure chamber and a low pressure chamber
The high pressure chamber by compressing the gas sucked into the low pressure chamber.
To the outside and supply the lubricating oil at the bottom of the closed container.
A horizontal type sleeve that is sucked up by an oil mechanism and supplied to sliding parts.
In the crawl compressor, the refueling mechanism is provided in a room partitioned from other parts,
Filter near the gas inlet located adjacent to the room
Install the filter, and sandwich the filter to cross section of the gas flow path.
Has a stepped portion that expands toward the downstream side, and
Sliding with the pressure guiding path that guides the low pressure from the low pressure part of the swirling gas vortex
In front of the lower oil return passage, where the lubricating oil dropped from the part returns.
A horizontal scroll compressor that opens in the writing room. 3. A filter for the main gas flow from the suction port
Mounted at right angles and caused along a clogged filter
A gas passage through which the gas bypass flows is installed along the gas bypass.
The horizontal scroll compressor according to claim 2.