JPH08219067A - Scroll compressor - Google Patents

Abstract

PURPOSE: To cool a turning scroll effectively by providing cooling holes, in which gas flows, in the end plate (shell plate) of the turning scroll so as to directly cool specially the high temperature part (near a discharge port) of the turning scroll. CONSTITUTION: Cooling holes 7 formed in the end plate of a turning scroll are so formed as to communicate one peripheral end side (suction side of the outermost peripheral part of the lap 2b of a fixed scroll) A with the other peripheral end side (the suction side of the outermost peripheral part of the lap of the turning scroll) B, and partitions 27, 28 for isolating the suction spaces A, B from each other are provided in the suction space of the fixed scroll so that much of air sucked from one suction side B passes through these cooling holes 7. With this constitution, part of sucked air is sucked to one side suction side of a scroll compressor through the cooling holes 7, and the scroll compressor can be cooled using the own suction space.

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 as an air compressor or a compressor for refrigeration and air conditioning, and in particular, a wrap on both sides suitable for realizing a large scroll compressor. The invention relates to a scroll compressor suitable for general industry, that is, for compressing gas without lubrication, that is, in the fields of food industry, pharmaceutical manufacturing, clean room of semiconductor manufacturing equipment, air conveying equipment, etc. .

[0002]

2. Description of the Related Art A conventional cooling method for a scroll compressor, such as an oil-free scroll compressor disclosed in Japanese Patent Laid-Open No. 63-125188, is to install a cooling fin on a fixed scroll to The method of cooling from the outside was adopted.

[0003]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention
A large-sized oil-free scroll compressor for air compression with a pressure of 0.85 MPa, and a conventional oil-free scroll compressor without a cooling medium in the compression process,
The temperature of the discharge air becomes as high as about 200 ° C. only by external cooling from the fixed scroll. As a result, unless the radial and thrust gaps of the orbiting scroll and fixed scroll are set to be large by predicting the thermal expansion during operation between the orbiting scroll and the fixed scroll, the scroll The laps touch each other. As described above, there is a problem that the performance of the compressor is deteriorated because the gap at the time of assembly becomes large. Further, the oil-free scroll compressor is usually provided with a tip seal at the tip of the scroll to prevent compressed gas from leaking. Although a resin of tetrafluoroethylene resin type is usually used as the material of the tip seal, there is a problem that the life of the tip seal is shortened because it is exposed to a high temperature condition of about 200 ° C. because the compressor is in operation. It was

An object of the present invention is to obtain a scroll compressor capable of effectively cooling a swirl scroll.

Another object of the present invention is to provide a scroll compressor capable of improving the compressor performance by reducing the radial gap and thrust gap between the swirl scroll and the fixed scroll. Especially.

A further object of the present invention is to provide a scroll compressor which can improve the life of the tip seal provided at the tip of the scroll wrap against wear.

Another object of the present invention is to obtain a scroll compressor capable of directly performing a swirl scroll with intake air having a low temperature.

Another object of the present invention is to obtain a scroll compressor which can lower the discharge temperature of the compressor to facilitate cooling of the discharge air and improve the reliability of the compressor.

Another object of the present invention is to balance the thrust force acting on the orbiting scroll of the oil free double scroll compressor to reduce the load acting on the tip seal and increase its life. To get a scroll compressor.

[0010]

SUMMARY OF THE INVENTION The present invention has been made based on the above object, and a cooling hole through which gas flows is provided in an end plate (body plate) of an orbiting scroll, and the orbiting scroll is performed by this gas.
In particular, a particularly high temperature portion (near the discharge port) of the tool is directly cooled. In particular, in the present invention, the intake air of its own is caused to flow through the cooling hole due to the pressure difference on the outer circumference of the swirl scroll, and the swirl scroll is directly cooled by the low temperature air of the outside air.

That is, the first feature of the present invention is to provide an orbiting scroll in which a spiral wrap is formed like a mirror plate, and a fixed scroll having a spiral wrap that meshes with the wrap, and rotate the orbiting scroll. In a scroll fluid machine configured so as to be able to revolve without a revolver, a cooling hole is formed in the end plate of the orbiting scroll so as to penetrate from one outer end side of the end plate to the outer end side of the other end of the scroll compressor. After at least a part of the suction gas has passed through the cooling hole, the suction gas is sucked into the compression working chamber from the suction side of the spiral wrap.

A second feature of the present invention is that a turning scroll having lap surfaces on both sides of the end plate, fixed scrolls arranged on both sides of the turning scroll, and fixed scrolls arranged on the both sides. In a scroll compressor provided with a drive shaft (crank shaft) and an auxiliary crank shaft that are rotatably supported by a scroll to rotate the swivel scroll, in an end plate of the orbiting scroll, from one end plate outer peripheral side. It is provided with a cooling hole which is formed so as to penetrate to the outer peripheral side of the other end plate and which allows at least a part of the suction gas of the scroll compressor to pass therethrough.

A third feature of the present invention is that the orbiting scroll has spiral wraps provided on both sides in the axial direction of the end plate, and the orbiting scrolls are respectively disposed on the left and right sides of the orbiting scroll. -Left and right fixed scrolls each having a spiral wrap that meshes with each of the rule wraps, and a drive shaft and an auxiliary crank that are rotatably supported by the left and right fixed scrolls via bearings to rotate the orbiting scroll. In a scroll compressor including a shaft and a timing belt for synchronously rotating the drive shaft and the auxiliary crankshaft, an end plate of the orbiting scroll is penetrated from one end plate outer peripheral side to the other end plate outer peripheral side. And a cooling hole through which at least a part of the intake gas of the scroll compressor passes, and the left and right fixed scroll outer surfaces. In further comprising a cooling fin extending in a direction for connecting the drive shaft and the auxiliary crank shaft and a cooling fan for supplying a coolant to the cooling fins.

A fourth feature of the present invention is that the orbiting scroll having lap surfaces on both sides of the end plate, the fixed scrolls disposed on both sides of the orbiting scroll, and the fixed scrolls disposed on the both sides. The main body of the scroll compressor, which has a drive shaft and an auxiliary crankshaft that are rotatably supported by the scroll and that causes the swivel scroll to make a swivel motion, and the main body of the scroll compressor are V
A motor driven via a belt, a starter board for controlling this motor drive, a discharge pipe for guiding the discharge gas from the compressor body to the outside, and a discharge pipe provided from the upstream side along the discharge pipe. A check valve, a precurler, an aftercooler, a cooling fan that cools each of the above devices, and a housing that contains the above devices are provided, and one end plate outer peripheral side of the other end plate is attached to the end plate of the orbiting scroll. A cooling hole is formed so as to penetrate to the outer circumferential side of the end plate of the scroll plate, and after at least a part of the suction gas of the scroll compressor has passed through the cooling hole, the spiral wrap is sucked into the compression working chamber. It is configured to be inhaled.

A fifth feature of the present invention is that the orbiting scroll having lap surfaces on both sides of the end plate, the fixed scrolls disposed on both sides of the orbiting scroll, and the fixed scrolls disposed on the both sides. In a scroll compressor provided with a drive shaft and an auxiliary crankshaft that are rotatably supported by a scroll and that causes the orbiting scroll to make a orbiting motion, in an end plate of the orbiting scroll,
A scroll compressor which is formed near the central portion of the end plate and which communicates with the compression working chambers formed on both sides of the end plate, and which is formed so as to penetrate from one outer peripheral side to the other outer peripheral side of the end plate. And a cooling hole through which at least a part of the intake gas is passed.

A sixth feature of the present invention is that a turning scroll having wrap surfaces on both sides of the end plate, fixed scrolls arranged on both sides of the turning scroll, and fixed scrolls arranged on the both sides. In a scroll compressor provided with a drive shaft and an auxiliary crank shaft which are rotatably supported by a scroll and rotate the orbiting scroll, a scroll compressor is formed in the vicinity of a central portion of an end plate of the orbiting scroll, and is provided on both sides of the end plate. A communication hole for communicating the formed compression working chamber and at least a part of the suction gas of the scroll compressor formed so as to penetrate from one outer peripheral side of the end plate of the orbiting scroll to the other outer peripheral side thereof. It is provided with a cooling hole, a suction space on the inlet side of the cooling hole, and a partition provided so as to isolate the suction space on the outlet side of the cooling hole.

A seventh feature of the present invention is that a turning scroll having lap surfaces on both sides of the end plate, fixed scrolls arranged on both sides of the turning scroll, and fixed scrolls arranged on the both sides. A double-toothed scroll that is rotatably supported by a scroll and that has a drive shaft and an auxiliary crankshaft that swivel the swivel scroll and that compresses the fluid sucked from the suction port by the eccentric movement of the swivel scroll. In the compressor, the end plate (body plate) of the orbiting scroll is provided with a cooling hole formed so as to penetrate in the circumferential direction and through which at least a part of the suction gas of the scroll compressor passes.

An eighth feature of the present invention is that a swivel scroll having lap surfaces on both sides of the end plate, fixed scrolls arranged on both sides of the swivel scroll, and fixed scrolls arranged on the both sides. A scroll compressor rotatably supported by a scroll and having a drive shaft and an auxiliary crankshaft for rotating the orbiting scroll, the scroll compressor being formed so as to laterally penetrate the end plate of the orbiting scroll. A cooling hole that allows at least a part of the intake gas of the compressor to pass through, a partition provided so as to isolate the suction space on the inlet side of the cooling hole and the suction space on the outlet side of the cooling hole. To prepare.

It is more effective to add the following features to the above features.

(1) A plurality of pressure equalizing holes for connecting the compression working chambers formed on both sides of the end plate of the orbiting scroll to balance the thrust force due to the gas pressure in the compression working chambers on both sides of the orbiting scroll end plate. To provide.

(2) The scroll compressor is provided with a tip seal at the tip of the spiral wrap of the fixed and orbiting scroll.

(3) The cooling hole is provided so as to pass near the center of the orbiting scroll, which has the highest temperature.

(4) The cooling hole has a checkered cross section.

(5) A plurality of cooling holes may be provided in parallel,
It is configured to include a plurality of vertical cooling holes provided in parallel and a plurality of lateral cooling holes that communicate these cooling holes.

(6) The cooling hole intersects a plurality of obliquely upward cooling holes and a plurality of obliquely upward left cooling holes at their intersections. It is formed so as to communicate with each other.

[0026]

The scroll compressor performs compression by the eccentric movement of the orbiting scroll with respect to the fixed scroll. A crankshaft is used to impart this eccentric motion to the orbiting scroll. The orbiting motion of the orbiting scroll gradually reduces the compression space of the orbiting scroll and the fixed scroll, and the compression progresses. During this compression process, the compressed air gradually becomes hot, and accordingly, the fixed and orbiting scroll itself also becomes hot from the outer circumference toward the center. The heat of compression is
Since it is attached to the outside of the fixed scroll, it can be indirectly cooled, and heat can be released to the outside of the scroll compressor via the cooling fins. As a result, the fixed scroll portion is cooled, but the orbiting scroll cannot be sufficiently cooled by the cooling fins. Therefore, in the present invention, a plurality of cooling holes are formed in the end plate (body plate) of the orbiting scroll. That is, the cooling hole is preferably provided so as to penetrate from the outer peripheral surface of the orbiting scroll to the center portion, and the one end opening portion of this cooling hole is brought close to the suction port to the scroll compressor and the other end portion thereof is provided. Since it is formed close to the suction side of the compression working chamber, a part of the intake air to the compressor passes through the cooling hole due to the pressure difference between both ends of the cooling hole. That is, the suction air of the compressor flows through the cooling hole from the position closer to the suction port toward the suction negative pressure, and the orbiting scroll is directly cooled by the suction air. This cools the high temperature part of the orbiting scroll, especially in the vicinity of the discharge port, reduces the thermal expansion of the center part of the orbiting scroll and cools the discharge air temperature, preventing contact between the orbiting scroll and fixed scroll and improving performance. And reliability can be improved.

[0027]

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

First, the overall construction of a scroll compressor when the present invention is used as an air compressor will be described with reference to FIG. In the figure, 101 is a housing, and inside the housing is a main block (compressor) 1 of a double scroll compressor.
02, a motor 103 that drives this scroll compressor via a V-belt 112, a starter board 104 that controls the drive of this motor, and a cooling fan 105 that cools the equipment in the housing.
And so on. The discharge gas from the compressor 102 is guided to the outside via a discharge pipe 106, and a check valve 107, a precooler 108, and an aftercooler 109 are provided in the middle of the discharge gas from the upstream side. In the figure,
110 is an unloader for controlling the intake gas to the compressor, 1
11 Suction filter provided in the suction pipe, 113
Is a motor base, 114 is a pedestal for supporting a motor and a compressor, and 115 is a fan casing.

A first embodiment of the present invention will be described with reference to FIGS. ◆ Fig. 1 is a cross-sectional plan view showing the structure of the main body block part of a double scroll type (both tooth type) oil-free scroll compressor, Fig. 2 is a view taken along the line II-II of Fig. 1, and Fig. 3 is that of Fig. 1. 5 is a right side view of the orbiting scroll shown in FIG. 1 with the right fixed scroll removed, and FIG. 4 is a view taken along the line VV of FIG.

In FIG. 1, reference numerals 1 and 2 denote fixed scrolls made of an aluminum alloy, which are arranged in parallel with each other, and an orbiting scroll 3 also made of an aluminum alloy is interposed between the fixed scrolls 1. , 2 spiral wraps 1b, 2b and spiral scroll 3 spiral wraps 3c, 3d mesh with each other,
Thereby, compression working chambers 4 and 5 are formed on both sides of the end plate (body plate) 3a of the orbiting scroll 3. Tip seals 1a, 2a, 3b are provided at the respective wrap tips of the fixed scroll and the orbiting scroll. These chip seals are made of an inorganic material such as carbon or a composite material of tetrafluoroethylene resin or polyimide resin. A communication hole 6 that connects the compression working chambers 4 and 5 is provided at the center of the end plate 3a of the orbiting scroll.
As shown in FIGS. 3 to 5, the cooling holes 7 are provided on both sides of the cooling plate so as to communicate from one outer peripheral end side of the end plate to the other outer peripheral end side thereof.
Is formed, and a part of the intake air is sucked into the intake side on one side of the scroll compressor through the cooling hole 7.

A drive shaft (crankshaft) 8 having a crank portion 8a and an auxiliary crankshaft 9 having a crank portion 9a having the same eccentric amount are arranged on the outer peripheral portion of the orbiting scroll 3, and the orbiting scroll 3 has them. The crank portion is engaged via rolling bearings 11a and 11b having elastic supporting portions so as to be capable of turning. On the other hand, fixed scroll 2
Has a discharge port 12 in the substantially central portion thereof, and further has radiating fins 1c, 2 on the entire outer surfaces of the fixed scrolls 1, 2.
c is provided, and flange portions 1d and 2d are provided on the outer peripheral portions thereof, respectively, and they are joined by bolts 13 as shown in FIGS. At the time of this coupling, the relative positions of the fixed scrolls 1 and 2 are adjusted by a positioning means 14 such as a knock pin. Further, the positional relationship between the fixed scrolls 1 and 2 and the orbiting scroll 3 is also properly positioned, and after that, with the phases of the drive shaft 8 and the auxiliary crank shaft 9 being proper, both shafts 8 and 9 are connected by the timing belt 15. Combined, shafts 8 and 9 are arranged to rotate in synchronism. The timing belt 15 includes a drive shaft 8 and a pulley 2 attached to an auxiliary crank shaft 9.
It is hung on 1, 22. V from a power source such as a motor
Rotational power is supplied to the drive shaft 8 via the belt 112 and the pulley 23.

The drive shaft 8 is axially supported by a rolling bearing (load side bearing) 16 fixed to the fixed scroll 1 in a state of being fixed in the axial direction, and the tip end of the drive shaft 8 is the other fixed scroll 2. Is rotatably supported by a bearing (anti-load side bearing) 17 fixed to A balance weight 18 is attached to the drive shaft 8 so as to be arranged in the suction atmosphere of the scroll compressor. The auxiliary crank shaft 9 is also axially supported in a state of being axially positioned by a rolling bearing (load side bearing) 19 fixed to the fixed scroll 1, and the tip end portion of the auxiliary crank shaft 9 is fixed to the other fixed scroll 2. It is axially supported by a fixed bearing (anti-load side bearing) 20.

The suction port 24 for handling gases such as air is shown in FIG.
As shown in FIG. 3, the shafts 8 and 9 are provided so as to extend across both fixed scrolls in a direction orthogonal to the axes. On the opposite lower side, as shown in FIG. 2, a leg 25 for installing the compressor is attached. ◆ As mentioned above, fixed scrolls 1 and 2
It is desirable that the orbiting scroll 3 is made of a material that is light and has good thermal conductivity, as typified by an aluminum alloy. In the case of a non-lubricating scroll compressor, it is desirable to apply an aluminum alloy containing silicon. Further, in order to improve the lubricity at the time of contact with the lap surface, a surface treatment such as an anodized film may be applied.

As shown in FIG. 3, the cooling hole 7 formed in the end plate 3a of the orbiting scroll 3 is on one outer peripheral end side (the outermost suction side of the wrap 2b of the fixed scroll 2).
From A to the other outer peripheral end side (wrap 3c of the turning scroll 3)
Of the fixed scroll so that most of the air sucked from one suction side B passes through this cooling hole 7. Partitions 27 and 28 are provided so as to isolate A and B from each other. With this configuration, a part of the intake air passes through the cooling hole 7 and is sucked into the suction side of the scroll compressor on one side as shown by the arrow in FIG. Air can be used to cool the scroll compressor.

Since the oil-free scroll compressor is designed to obtain a clean compressed gas without inserting a cooling medium such as oil into the compression chamber, the discharge pressure is 0.7 to 0.
Even at about 8 MPa, the temperature rises to about 200 ° C due to the compression heat generated in the compression chamber. In order to cool the compression heat, cooling fins 1c and 2c are provided on the outer surfaces of the left fixed scroll 1 and the right fixed scroll 2, and a cooling fan (see FIG. 12) forcibly blows the cooling air to radiate the compression heat. To cool. On the other hand, in the present embodiment, the communication hole 6 is sandwiched in the end plate 3a of the orbiting scroll 3 and the vertical direction (suction port 24
Since at least two cooling holes 7 are provided in the same direction), the compressor can be cooled from the inside. The cooling hole 7 penetrates the central portion of the orbiting scroll 3 having the highest temperature.

As shown in FIG. 3, the outer peripheral portion of the orbiting scroll 3 is the suction spaces A and B of the compressor, and the suction port 2
The air sucked from 4 is flowing. There is a slight negative pressure on the cooling outlet 7b side of the cooling hole 7 than on the cooling inlet 7a side (a differential pressure of about 100 mmAq). This differential pressure 100mmA
Using q, the suction air passes through the cooling hole 7 and is sucked into the compression chamber. Since the air passing through the cooling hole 7 is the outside air, the temperature is about 0 to 40 ° C., which is much lower than the discharge gas temperature of the compressor. It is cooled by exchanging heat with the part.

The gas sucked in through the suction port 24 has the orbiting scroll 3, the left fixed scroll 1 and the right fixed scroll 2
Is sucked into the lap surface of the nozzle, and the pressure is increased to a predetermined pressure each time the rotation advances, and is discharged from the discharge port 12. In the drive system for orbiting the orbiting scroll 3, first, power is transmitted from the power source 103 such as a motor to the V pulley 23 to rotate the drive shaft 8. The drive shaft 8 is supported by a load-side rolling bearing 16 and an anti-load-side rolling bearing 17,
Orbiting scroll 3 via a crank bearing 11a provided on the
To make a swivel motion. The crank bearing 11a supports a gas load generated by compression. The auxiliary crankshaft 9 rotates in synchronization with the drive shaft 8 by the timing belt 15. The auxiliary crank shaft 9 is supported by a rolling bearing 19 on the load side and a rolling bearing 20 on the counter load side, and the crank portion 9a is supported.
Through the rolling bearing 11b provided on the drive shaft 8
Drives the orbiting scroll 3 in cooperation with.

When the rotational power is transmitted to the pulley 23, the drive shaft 8 and the auxiliary crank shaft 9 rotate in synchronization with each other by the timing belt 15, so that the orbiting scroll 3 adjusts the eccentric amount of the drive shaft 8 and the auxiliary crank shaft 9. Performs a turning motion with a radius. With this swirling motion, the external air is sucked from the suction port 24 and enters the suction chamber (suction space) A. After that, the sucked air further flows into the compression working chambers 4 and 5 formed by the orbiting scroll 3 and the fixed scrolls 1 and 2, and is compressed to a predetermined pressure. The air compressed in the compression working chambers 4 and 5 is finally discharged from the discharge port 12, but the gas compressed in the compression working chamber 4 on the side opposite to the discharge port 12 with the mirror plate 3a interposed therebetween is mirror plate. 3a through a communication hole 6 provided in the central portion, flow into and merge into the compression working chamber 5 at the central portion on the opposite side, and discharge from the discharge space to the outside of the machine from a discharge port 12 provided in the fixed scroll 2. To be done.

Since there is almost no lubricating oil in the compression working chamber, the temperature of the compressed gas becomes higher than that of the oil-cooled compressor, but the radiator fins 1c, 2c provided on the outer surface of the fixed scroll are forcedly air-cooled by a duct structure. As a result, the cooling effect can be further improved. 3 and 4, reference numeral 30 denotes a pressure equalizing hole formed on both sides of the swivel scroll 3 for maintaining the pressure balance of the compression working chambers 4 and 5, which is a double (double-toothed) scroll of the present invention. In the compressor, the pressure equalizing holes 30 make the total thrust forces due to the gas in the compression working chambers on both sides of the end plate 3a substantially equal, so that the laps 1b, 2b, 3c, 3d.
A large thrust load does not act on the tip seals 1a, 2a, 3b on the tip surface of the. Therefore, the sliding loss at the tip of the lap can be kept to a minimum. Further, since the thrust forces acting on the orbiting scroll 3 are almost balanced, the positioning means for the bearings 11a and 11b supporting the orbiting scroll 3 can be simplified and the assemblability can be improved.

According to the embodiment described above, the following effects can be obtained. (1) Not only can the fixed scrolls 1 and 2 be cooled from the outside by the radiation fins 1c and 2c, but also the orbiting scroll 3 arranged inside can be directly cooled by the cooling hole 7, so that the center portion of the orbiting scroll is also cooled. The temperature can be lowered by about 30 ° C. as compared with the conventional case. As a result, the gap formed by the fixed scroll and the orbiting scroll can be made smaller, and as a result, the compressor performance can be improved by 3 to 5%. (2) The discharge air temperature of the compressor can be lowered, the discharge air can be easily cooled, and the reliability of the compressor can be improved.
◆ (3) The temperature of the tip seal provided at the tip of each wrap of the oil-free double scroll compressor is about 30 compared to the conventional temperature.
Since the temperature can be lowered by ° C, the material for the tip seal can be easily selected and the life of the tip seal can be improved. Particularly, in this embodiment, since the orbiting scroll end plate is provided with the pressure equalizing holes 30 for communicating the compression working chambers on both sides of the end plate to balance the pressure, it is possible to further balance the thrust force acting on the orbiting scroll. The load acting on each tip seal can also be reduced and its life can be increased.

Various modifications of the present invention will be described with reference to FIGS.

FIG. 6 shows a cross-sectional shape of the cooling hole 7 formed in the end plate of the orbiting scroll, which is replaced by the round hole shown in FIG. The heat area can be increased, and the cooling effect can be improved.

In FIG. 7, the number of cooling holes 7 formed in the end plate of the swirl scroll is changed from the two shown in FIG. 4 to four, and the passage area of the intake air passing through the cooling holes 7 is changed. Increase
The passage resistance is reduced, the amount of air passing through is increased, the cooling effect is improved, and the entire swirl scroll can be cooled. In addition, by making the passage area of the cooling hole near the center portion larger than the passage area of the cooling hole formed on the outer side, it is possible to generate the cooling capacity according to the amount of heat generated in the orbiting scroll.

FIG. 8 is a vertical direction as shown in FIG. 7 (a vertical direction in the figure, and its inlet side is close to the suction port 24).
4 cooling holes 7 are provided, and four lateral (horizontal) cooling holes 71 formed so as to connect these cooling holes 7 are also provided. ◆ In FIG. 9, a plurality of diagonally upward cooling holes 72 and a plurality of diagonally upward left cooling holes 73 intersect each other,
It is formed so as to communicate with each other at the intersection. ◆ By configuring as shown in FIGS. 8 and 9, the cooling can be performed more uniformly. FIG. 10 shows a turning scroll.
In this case, two cooling holes 74 are provided in the lateral direction in the lens end plate 3a. When the cooling holes are provided as shown in this figure, partitions 31, 32, 33 are provided so that the intake air flows from left to right, for example, as shown by the arrow in FIG. According to this example, the intake air flowing through the cooling hole 74 flows into the intake sides on both sides of the scroll compressor, so that the amount of cooling air flowing through the cooling hole can be increased. .

In the embodiment described above, the swirl scroll is cooled by its own intake air.
If another cooling fluid (for example, external air or cooled low-temperature air) is introduced from the outside and the cooling fluid is forced to flow directly into the cooling hole formed in the swirl scroll, the cooling effect is further improved. You can also do it.

[0046]

According to the embodiments described above, the following effects can be obtained. (1) Even if the orbiting scroll cannot be cooled from the outside by a cooling fin or the like due to the cooling hole formed in the end plate of the orbiting scroll, the orbiting scroll can be directly cooled from the inside, and the temperature of the orbiting scroll is reduced. Can be reduced. As a result, the gap formed by the fixed scroll and the orbiting scroll can be made smaller, and the performance of the compressor can be improved. (2) The discharge air temperature of the compressor can be lowered, the discharge gas can be easily cooled, and the reliability of the compressor can be improved.
◆ (3) In the case where the fixed radiator is provided with a radiation fin,
The fixed scroll can be efficiently cooled from the outside. ◆ (4) Since the temperature of the tip seal provided at the tip of each wrap of the oil-free double scroll compressor can also be lowered, the tip seal material can be selected easily.
In addition, the service life due to wear can be improved. If the swirl scroll end plate is provided with a pressure equalizing hole that communicates the compression working chambers on both sides of the end plate to balance the pressure, the thrust force acting on the swirl scroll can be more balanced.
The load acting on each tip seal can be further reduced, and the life can be increased.

[Brief description of drawings]

FIG. 1 is a plan sectional view of a partial structure of a main block of a double scroll type oil-free scroll compressor showing an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II of FIG.

[FIG. 3] III-III by removing the right side fixed scroll of FIG.
It is the right view seen from the line direction.

FIG. 4 is a right side view of the orbiting scroll shown in FIG.

FIG. 5 is a view taken along line VV of FIG. 4;

6 is a modified example of the shape of the cooling hole 7 formed in the end plate of the orbiting scroll and corresponds to FIG.

FIG. 7 is a diagram corresponding to FIG. 4 showing a modified example of the cooling holes formed in the end plate of the orbiting scroll.

FIG. 8 is a diagram corresponding to FIG. 4 showing another modified example of the cooling holes formed in the end plate of the orbiting scroll.

FIG. 9 is a view corresponding to FIG. 4 showing another modified example of the cooling holes formed in the end plate of the orbiting scroll.

FIG. 10 is a view corresponding to FIG. 4 showing another modified example of the cooling holes formed in the end plate of the orbiting scroll.

11 is a diagram illustrating a structure of a partition in the modification example of FIG. 10 and is a diagram corresponding to FIG. 3. FIG.

FIG. 12 is a diagram illustrating an entire configuration of a scroll compressor.

[Explanation of symbols]

1 ... Left fixed scroll, 2 ... Right fixed scroll, 1c,
2c ... Heat dissipation (cooling) fins, 3 ... Orbiting scroll, 3a
... Orbiting scroll end plate, 1a, 2a, 3b ... Chip sheet
1b, 2b, 3c, 3d ... Wrap, 4,5, compression working chamber, 7, 71, 72, 73, 74 ... Cooling hole, 7a.
Cooling hole inlet, 7b ... Cooling hole outlet, 8 ... Drive shaft, 9 ...
Auxiliary crankshaft, 8a, 9a ... Crank part, 11a, 1
1b ... Rolling bearing (crank bearing), 12 ... Discharge port
G, 15 ... Timing belt, 16, 19 ... Rolling bearing (load side bearing), 17, 20 ... Rolling bearing (anti-load side bearing) 21, 22, ... Pulley, 23 ... V pulley, 24 ...
Suction port, 25 ... Legs, 27, 28 ... Partitions, A, B ... Suction side (suction space).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Machida 502 Kintatemachi, Tsuchiura, Ibaraki Prefecture

Claims (15)

[Claims] 1. A scroll comprising an orbiting scroll having an end plate-like spiral wrap and a fixed scroll having a spiral wrap meshing with the wrap, and being capable of revolving without revolution of the orbiting scroll. In a scroll fluid machine, a cooling hole is formed in an end plate of the orbiting scroll so as to penetrate from one end plate outer peripheral side to the other end plate outer peripheral side, and at least a part of intake gas of a scroll compressor is cooled by the cooling plate. A scroll compressor, wherein the scroll compressor is configured to be sucked into the compression working chamber from the suction side of the spiral wrap after passing through the use hole. 2. A swivel scroll having lap surfaces on both sides of an end plate.
A fixed scroll arranged on both sides of the swivel scroll, a drive shaft (crankshaft) which is rotatably supported by the fixed scrolls arranged on both sides of the swivel scroll, and causes the swivel scroll to swivel. In a scroll compressor having an auxiliary crankshaft, an end plate of the orbiting scroll is formed so as to penetrate from one end plate outer peripheral side to the other end plate outer peripheral side, and at least the intake gas of the scroll compressor. A scroll compressor having a cooling hole for passing a part thereof. 3. A swivel scroll having spiral wraps respectively provided on both axial sides of the end plate, and swivel scrolls disposed on the left and right sides of the swivel scroll, respectively.
The left and right fixed scrolls each having a spiral wrap that meshes with each of the rule wraps, and the swivel scroll rotatably supported by the left and right fixed scrolls through bearings.
In a scroll compressor having a drive shaft and an auxiliary crank shaft for rotating the rotary shaft, and a timing belt for synchronously rotating the drive shaft and the auxiliary crank shaft, the end plate of the orbiting scroll has one end plate. A cooling hole which is formed so as to penetrate from the outer peripheral side to the outer peripheral side of the other end plate and which allows at least a part of the suction gas of the scroll compressor to pass therethrough, and which is formed on the outer surfaces of the left and right fixed scrolls, A scroll compressor comprising: a cooling fin extending in a direction connecting a drive shaft and the auxiliary crankshaft; and a cooling fan for flowing a cooling medium through the cooling fin. 4. A swivel scroll having lap surfaces on both sides of an end plate.
A fixed scroll arranged on both sides of the swivel scroll, and a drive shaft and an auxiliary crankshaft that are rotatably supported by the fixed scrolls arranged on both sides of the swivel scroll to rotate the swivel scroll. A main body of the scroll compressor, a motor for driving the main body of the scroll compressor via a V-belt, a starter board for controlling the drive of the motor, and a gas discharged from the main body of the compressor. A discharge pipe that guides the air to the outside, a check valve, a precooler, and an aftercooler provided from the upstream side along the discharge pipe, a cooling fan that cools each of the above devices, and the above device. A casing is provided, a cooling hole is formed on the end plate of the orbiting scroll so as to penetrate from one end plate outer peripheral side to the other end plate outer peripheral side, and at least a part of the suction gas of the scroll compressor is After passing through the cooling hole, Scroll compressor, characterized by being configured as a suction side of Jo lap is drawn into the compression operation chamber. 5. A swivel scroll having lap surfaces on both sides of the end plate.
A fixed scroll arranged on both sides of the swivel scroll, and a drive shaft and an auxiliary crankshaft that are rotatably supported by the fixed scrolls arranged on both sides of the swivel scroll to rotate the swivel scroll. In a scroll compressor provided with, the orbiting scroll end plate, a communication hole formed in the vicinity of the central portion of the end plate, for communicating compression working chambers formed on both sides of the end plate, and one outer peripheral side of the end plate. To a second outer peripheral side of the scroll compressor, and a cooling hole through which at least a part of the suction gas of the scroll compressor passes. 6. A swivel scroll having lap surfaces on both sides of an end plate.
A fixed scroll arranged on both sides of the swivel scroll, and a drive shaft and an auxiliary crankshaft that are rotatably supported by the fixed scrolls arranged on both sides of the swivel scroll to rotate the swivel scroll. In a scroll compressor provided with, a communication hole that is formed near the central portion of the end plate of the orbiting scroll and connects the compression working chambers formed on both sides of the end plate, and one outer peripheral side of the end plate of the orbiting scroll. To the other outer peripheral side for passing at least a part of the suction gas of the scroll compressor, a suction space (A) on the inlet side of the cooling hole, and a cooling hole And a partition provided so as to isolate the suction space (B) on the outlet side of the scroll compressor. 7. A swivel scroll having lap surfaces on both sides of an end plate.
A fixed scroll arranged on both sides of the swivel scroll, and a drive shaft and an auxiliary crankshaft that are rotatably supported by the fixed scrolls arranged on both sides of the swivel scroll to rotate the swivel scroll. In a double-toothed scroll compressor for compressing the fluid sucked from the suction port by the eccentric movement of the orbiting scroll, the end plate (body plate) of the orbiting scroll is penetrated in the circumferential direction. A scroll compressor, characterized in that it is provided with a cooling hole for passing at least part of the suction gas of the scroll compressor. 8. A compression operation chamber (4) (5) formed on both sides of the orbiting scroll is communicated with an end plate of the orbiting scroll, and compression operation is performed on both sides of the orbiting scroll end plate. A scroll compressor having a plurality of pressure equalizing holes for balancing thrust forces caused by gas pressure in a room. 9. A scroll compressor according to any one of claims 1 to 8, wherein a tip seal is provided at the tip of the spiral wrap of the fixed and orbiting scrolls. 10. The scroll compressor according to claim 1, wherein the cooling hole is provided so as to pass near a central portion of the orbiting scroll having the highest temperature. 11. The method according to any one of claims 1 to 10,
A scroll compressor, wherein the cooling hole has a cross-sectional shape in a chrysanthemum pattern. 12. The method according to any one of claims 1 to 11,
A scroll compressor, wherein a plurality of the cooling holes are provided in parallel. 13. The method according to any one of claims 1 to 12,
The scroll compressor is characterized in that the cooling holes include a plurality of vertical cooling holes provided in parallel and a plurality of lateral cooling holes communicating the cooling holes. 14. The method according to any one of claims 1 to 13,
As for the cooling holes, a plurality of diagonally upward cooling holes and a plurality of diagonally upward left cooling holes are intersected with each other so that they communicate with each other at the intersections. A scroll compressor characterized by being formed. 15. A swivel scroll having lap surfaces on both sides of the end plate, fixed scrolls disposed on both sides of the swivel scroll, and rotatably supported by the fixed scrolls disposed on the both sides. In a scroll compressor having a drive shaft and an auxiliary crank shaft for rotating the orbiting scroll, a suction gas of the scroll compressor is formed so as to laterally penetrate the end plate of the orbiting scroll. A cooling hole through which at least a part passes, a partition provided so as to isolate the inlet space (A) on the inlet side of the cooling hole and the inlet space (B) on the outlet side of the cooling hole. A scroll compressor characterized by comprising.