JP2985705B2 - 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 as an air compressor or a compressor for refrigeration and air conditioning, and more particularly to a wrapping on both sides suitable for realizing a large-sized scroll compressor. The present invention relates to a scroll compressor suitable for general industry, that is, for the fields of food industry, pharmaceutical manufacturing, clean room of semiconductor manufacturing equipment, pneumatic conveying equipment, etc. .

[0002]

2. Description of the Related Art As a conventional scroll compressor cooling method, such as an oilless scroll compressor disclosed in Japanese Patent Application Laid-Open No. 63-125188, a fixed scroll is provided with cooling fins and a scroll fin is provided. A method of cooling from the outside was adopted.

[0003]

The discharge pressure is 0.7 to
A large oil-free scroll compressor for air compression having a pressure of 0.85 MPa, and a conventional oil-free scroll compressor having no cooling medium in the compression process,
The discharge air temperature is as high as about 200 ° C. only by external cooling from the fixed scroll. As a result, unless the radial gap and the thrust gap of the orbiting scroll and the fixed scroll are made large by estimating the thermal expansion during the operation between the orbiting scroll and the fixed scroll, the scroll is not compressed during the compression operation. The wraps come in contact. As described above, there is a problem that the performance of the compressor is reduced due to a large gap at the time of assembly. The oil-free scroll compressor is provided with a tip seal at the tip of the normal scroll to prevent the compressed gas from leaking. Normally, a tetrafluoroethylene resin is used as the material for the tip seal, but there is a problem that the life of the tip seal is shortened because the tip seal is exposed to a high temperature condition of about 200 ° C. during the operation of the compressor. Was.

An object of the present invention is to provide a scroll compressor capable of effectively cooling a swirling 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 the thrust gap between the revolving scroll and the fixed scroll. It is in.

It is still another object of the present invention to provide a scroll compressor capable of improving the life of a tip seal provided at the tip of a scroll wrap against abrasion.

It is another object of the present invention to provide a scroll compressor which can directly perform a swirling scroll with low-temperature intake air.

Another object of the present invention is to provide a scroll compressor capable of lowering the discharge temperature of the compressor, facilitating cooling of the discharge air, and improving the reliability of the compressor.

Another object of the present invention is to balance the thrust force acting on the swirl scroll of the oil free double scroll compressor, thereby reducing the load acting on the chip seal and increasing its life. It is to obtain 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 a gas flows is provided in a head plate (body plate) of an orbiting scroll.
In particular, the high temperature portion (near the discharge port) of the nozzle is directly cooled. In the present invention, in particular, its own intake air is caused to flow through the cooling hole by the pressure difference on the outer periphery of the swirl scroll, and the swirl scroll is directly cooled by the low-temperature air of the outside air.

[0011]

A first feature of the present invention is that a turning scroll having wrapping surfaces on both sides of a head plate, fixed scrolls disposed on both sides of the turning scroll, and fixed scrolls disposed on both sides of the turning scroll In a scroll compressor provided with a drive shaft (crankshaft) rotatably supported by a scroll and rotating the orbiting scroll and an auxiliary crankshaft, the end plate of the orbiting scroll is attached to the end plate from the outer peripheral side of one of the end plates. It is provided with a cooling hole formed to penetrate the other end plate outer peripheral side and through which at least a part of the suction gas of the scroll compressor passes.

A second feature of the present invention is that a turning scroll having spiral wraps provided on both axial sides of a head plate, and the turning scroll is disposed on each of the left and right sides of the turning scroll. Left and right fixed scrolls having a spiral wrap meshing with each of the left and right wraps, and the left and right fixed scrolls are rotatably supported via bearings respectively.
It is pre Symbol orbiting scroll - a drive shaft and an auxiliary crank shaft pivoting movement Le, scroll and a timing belt for synchronously rotating the auxiliary crank shaft and the drive shaft - in Le compressor, the orbiting scroll A cooling hole formed in the end plate so as to penetrate from one end plate outer periphery side to the other end plate outer periphery side, and through which at least a part of the suction gas of the scroll compressor passes, and outside the left and right fixed scrolls. and cooling fins formed on the surface is to comprise a cooling fan for supplying a coolant to the cooling fins.

A third feature of the present invention is that a turning scroll having wrapping surfaces on both sides of a head plate, fixed scrolls arranged on both sides of the turning scroll, and fixed scrolls arranged on both sides of the turning scroll A scroll compressor having a drive shaft and an auxiliary crank shaft rotatably supported by a scroll and having a swinging motion of the swivel scroll, and a main body of the scroll compressor having a V
A motor driven via a belt, a starter for controlling the motor drive, a discharge pipe for guiding the discharge gas from the compressor body to the outside, and an upstream pipe provided along the discharge pipe. A check valve, a pre-cooler, an after-cooler, a cooling fan for cooling the above-mentioned devices, and a housing for housing the above-mentioned devices; A cooling hole is formed so as to penetrate the outer peripheral side of the end plate, and at least a part of the suction gas of the scroll compressor passes through the cooling hole.

A fourth feature of the present invention is that a turning scroll having lap surfaces on both sides of a head plate, fixed scrolls arranged on both sides of the turning scroll, and fixed scrolls arranged on both sides of the turning scroll In a scroll compressor having a drive shaft rotatably supported by a scroll and an orbital movement of the orbiting scroll, and an auxiliary crankshaft, the end plate of the orbiting scroll includes:
Is formed on its mirror plate, it is formed so as to penetrate the end plate communicating hole for communicating the compression operation chamber is formed on both sides, from one outer peripheral side of the end plate to the other outer peripheral side scroll - Le compressor suction gas And a cooling hole for passing at least a part of the cooling water.

A fifth feature of the present invention is that a turning scroll having wrapping surfaces on both sides of a head plate, fixed scrolls arranged on both sides of the turning scroll, and fixed scrolls arranged on both sides of the turning scroll sucrose - is rotatably supported in Le said orbiting scroll - scroll and a drive shaft and an auxiliary crank shaft pivoting movement Le - in Le compressor, made form <br/> mirror plate of the orbiting scroll, the end plate A communication hole formed on both sides for communicating the 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 to the other outer peripheral side of the end plate of the orbiting scroll. A cooling hole to be passed, a suction space on the inlet side of the cooling hole, and a partition provided to isolate the suction space on the outlet side of the cooling hole.

A sixth feature of the present invention is that a turning scroll having lap surfaces on both sides of a head plate, fixed scrolls provided on both sides of the turning scroll, and fixed scrolls provided on the both sides are provided. A double-toothed scroll, which is rotatably supported by a scroll and rotates the orbiting scroll, and an auxiliary crankshaft, and compresses the fluid sucked from the suction port by the eccentric movement of the orbiting scroll. In the compressor, a drive shaft is provided on the end plate (body plate) of the orbiting scroll.
A cooling hole is formed so as to penetrate in a direction perpendicular to a line connecting the crankshafts and allows at least a part of the intake gas of the scroll compressor to pass therethrough.

A seventh feature of the present invention is that a turning scroll having wrapping surfaces on both sides of a head plate, fixed scrolls disposed on both sides of the turning scroll, and fixed scrolls disposed on the both sides are provided. In a scroll compressor having a drive shaft rotatably supported by a scroll and an orbital movement of the orbiting scroll and an auxiliary crankshaft, the scroll is formed so as to penetrate the end plate of the orbiting scroll in a lateral direction. A cooling hole through which at least a part of the suction gas of the compressor passes, a suction space on the inlet side of the cooling hole, and a partition provided to isolate the suction space on the outlet side of the cooling hole. It is to provide.

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

(1) Compression working chambers formed on both sides of the orbiting scroll are communicated with the head plate of the orbiting scroll, and a plurality of pressure equalizing holes for balancing the thrust force due to gas pressure in the compression working chambers on both sides of the orbiting scroll head plate. Is provided.

(2) A scroll compressor having a tip seal at the tip of a spiral wrap of a fixed and orbiting scroll.

(3) The cooling hole is provided so as to pass near the center of the swirling scroll where the temperature is the highest.

(4) The cross section of the cooling hole is formed in a chrysanthemum shape.

(5) A plurality of cooling holes may be provided in parallel,
A plurality of cooling holes in the vertical direction are provided in parallel, and a plurality of cooling holes in the horizontal direction connecting the cooling holes are provided.

(6) The cooling holes cross each other with a plurality of obliquely formed cooling holes ascending to the right and a plurality of obliquely formed cooling holes ascending to the left. They are formed so as to communicate with each other.

[0026]

The scroll compressor performs compression by eccentric movement of the orbiting scroll with respect to the fixed scroll. A crankshaft is used to give this eccentric movement to the orbiting scroll. The orbiting motion of the orbiting scroll gradually reduces the compression space between the orbiting scroll and the fixed scroll, and the compression proceeds. During the compression process, the temperature of the compressed air gradually increases, and accordingly, the fixed and orbiting scrolls themselves also increase in temperature from the outer periphery toward the center. The heat of compression is
By being mounted outside the fixed scroll, it can be indirectly cooled, and can radiate heat to the outside of the scroll compressor via cooling fins. Thus, the fixed scroll portion is cooled, but the cooling fins cannot sufficiently cool the orbiting scroll. For this reason, 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 holes are preferably provided so as to penetrate the central portion from the outer peripheral surface of the orbiting scroll, one opening of the cooling holes sucrose - while brought close to the suction port of the Le compressor made form Therefore, a part of the intake air to the compressor passes through the cooling hole due to a 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 portion of the orbiting scroll, especially near the discharge port, reduces thermal expansion at the center of the orbiting scroll, and cools the discharge air temperature to prevent contact between the orbiting scroll and the fixed scroll and improve performance. And reliability can be improved.

[0027]

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

First, the overall structure of a scroll compressor in the case where the present invention is used as an air compressor will be described with reference to FIG. In the figure, reference numeral 101 denotes a housing. Inside the housing, a main block (compressor) 1 of a double scroll compressor is provided.
02, a motor 103 for driving the scroll compressor via a V-belt 112, a starter panel 104 for controlling the driving of the motor, and a cooling fan 105 for cooling the devices in the housing.
And so on. The discharge gas from the compressor 102 is guided to the outside through a discharge pipe 106, and a check valve 107, a pre-cooler 108, and an after-cooler 109 are provided on the way from the upstream side. In the figure,
Reference numeral 110 denotes an unloader for controlling the intake gas to the compressor, 1
11 suction filter provided in suction pipe, 113
, A motor base; 114, a stand for supporting a motor and a compressor; and 115, a fan casing.

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

In FIG. 1, reference numerals 1 and 2 denote fixed scrolls made of an aluminum alloy, respectively, which are arranged in parallel with each other, and between which a orbiting scroll 3 also made of an aluminum alloy is interposed. , 2 and the spiral wraps 3c and 3d of the orbiting scroll 3 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 tips of the wraps of the fixed scroll and the orbiting scroll, respectively. These tip seals are formed of an inorganic material such as carbon or a composite material of tetrafluoroethylene resin or polyimide resin. A communication hole 6 for communicating 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, cooling holes 7 communicating from one outer peripheral end to the other outer peripheral end of the end plate are provided on both sides of the end plate.
Is formed so that a part of the intake air is sucked into one suction side of the scroll compressor through the cooling holes 7.

A drive shaft (crankshaft) 8 having a crank portion 8a and an auxiliary crankshaft 9 having a crank portion 9a having the same eccentricity are arranged on the outer peripheral portion of the end plate of the orbiting scroll 3. Are pivotally engaged via rolling bearings 11a and 11b having elastic support portions. On the other hand, fixed scroll 2
Has a discharge port 12 at a substantially central portion thereof, and further has radiation fins 1c and 2 on the entire outer surfaces of the fixed scrolls 1 and 2.
c are provided, and flange portions 1d and 2d are provided on their outer peripheral portions, respectively, and they are connected by bolts 13 as shown in FIGS. At the time of this connection, the relative positions of the fixed scrolls 1 and 2 are adjusted by 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 determined, and then, with the phases of the drive shaft 8 and the auxiliary crankshaft 9 properly adjusted, the two shafts 8 and 9 are Combined, the shafts 8 and 9 are configured to rotate synchronously. The timing belt 15 includes a drive shaft 8 and a pulley 2 attached to an auxiliary crank shaft 9.
Multiplied by 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 where it is fixed in the axial direction. Is supported by a bearing (anti-load side bearing) 17 fixed to the shaft. A balance weight 18 is mounted on the drive shaft 8 so as to be disposed in the suction atmosphere of the scroll compressor. The auxiliary crankshaft 9 is also axially supported by a rolling bearing (load-side bearing) 19 fixed to the fixed scroll 1 in a state of being positioned in the axial direction. The tip of the auxiliary crankshaft 9 is fixed to the other fixed scroll 2. Bearing (anti-load side bearing) 20.

The intake port 24 for handling gas such as air is shown in FIG.
As shown in the figure, the shafts 8 and 9 are provided across both fixed scrolls in a direction perpendicular to the shafts. As shown in FIG. 2, a leg 25 for installing the compressor is mounted on the lower side of the opposite side. ◆ As described above, fixed scrolls 1, 2
The orbiting scroll 3 is desirably made of a light material having good heat conductivity, as represented by an aluminum alloy or the like. In the case of a non-lubricating scroll compressor, it is desirable to use 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 anodic oxide film may be performed.

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

The oil-free scroll compressor is designed to obtain a clean compressed gas without introducing a cooling medium such as oil into the compression chamber, so that the discharge pressure is 0.7 to 0.1.
Even at about 8 MPa, the temperature rises to about 200 ° C. due to the heat of compression generated in the compression chamber. Cooling fins 1c, 2c are provided on the outer surfaces of the left fixed scroll 1 and the right fixed scroll 2 for cooling the compression heat, and the cooling air is forced to flow by a cooling fan (see FIG. 12) to release the compression heat. And let it cool. On the other hand, in the present embodiment, the communication hole 6 is interposed in the end plate 3a of the orbiting scroll 3, and
(In the same direction as above), and at least two cooling holes 7 are provided, so that the compressor can be cooled from the inside. The cooling hole 7 passes through the center of the orbiting scroll 3 where the temperature is the highest.

As shown in FIG. 3, the outer periphery of the orbiting scroll 3 forms suction spaces A and B of the compressor.
The air sucked from 4 is flowing. The cooling outlet 7b has a slightly lower pressure than the cooling inlet 7a of the cooling hole 7 (differential pressure of about 100 mmAq). This differential pressure is 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 outside air, it has a temperature of about 0 to 40 ° C., which is much lower than the discharge gas temperature of the compressor. Heat exchange with part and cooling.

The gas sucked from the suction port 24 is supplied to the orbiting scroll 3, the left fixed scroll 1 and the right fixed scroll 2
The pressure is raised to a predetermined pressure as the rotation proceeds, and is discharged from the discharge port 12. In the drive system for orbiting the orbiting scroll 3, first, power is transmitted from a 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 a non-load-side rolling bearing 17.
Scroll 3 via crank bearing 11a provided in
Is swiveled. The crank bearing 11a supports a gas load generated by compression and the like. The auxiliary crankshaft 9 is rotated by the timing belt 15 in synchronization with the drive shaft 8. The auxiliary crankshaft 9 is supported by a rolling bearing 19 on the load side and a rolling bearing 20 on the non-load side.
Of the drive shaft 8 via a rolling bearing 11b provided in
Cooperates to drive the turning scroll 3.

When the rotational power is transmitted to the pulley 23, the drive shaft 8 and the auxiliary crank shaft 9 rotate synchronously by the timing belt 15, whereby the orbiting scroll 3 reduces the amount of eccentricity of the drive shaft 8 and the auxiliary crank shaft 9. Perform a turning motion with a radius. The external air is sucked from the suction port 24 with this swirling motion and enters the suction chamber (suction space) A. Thereafter, 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 end plate 3a interposed therebetween. Through the communication hole 6 provided in the central portion of 3a, it flows into the compression operation chamber 5 in the opposite central portion and merges, and discharges from the discharge space to the outside from the discharge port 12 provided in the fixed scroll 2 from the discharge space. Is done.

Although the compression working chamber has almost no lubricating oil, the temperature of the compressed gas is higher than that of the oil-cooled compressor. However, forced air cooling is performed around the radiation fins 1c and 2c provided on the outer surface of the fixed scroll as a duct structure. Thereby, the cooling effect can be further improved. In FIGS. 3 and 4, reference numeral 30 denotes a pressure equalizing hole formed on both sides of the revolving scroll 3 for maintaining the pressure balance between the compression working chambers 4 and 5, and a double (double tooth) scroll of the present invention. In the compressor, the sum of the thrust forces due to the gas in the compression working chambers on both sides of the end plate 3a is made substantially equal by the pressure equalizing holes 30, so that the wraps 1b, 2b, 3c, 3d
A large thrust load does not act on the tip seals 1a, 2a, 3b on the front end face of the first. Therefore, the sliding loss at the tip of the wrap can be kept to a minimum. Furthermore, since the thrust forces acting on the orbiting scroll 3 are substantially balanced, the means for positioning the bearings 11a and 11b that support 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) The fixed scrolls 1 and 2 can be cooled not only from the outside by the radiation fins 1c and 2c, but also the orbiting scroll 3 disposed inside can be directly cooled by the cooling holes 7, so that the center of the orbiting scroll can be cooled. The temperature can be reduced by about 30 ° C. as compared with the related art. Thereby, 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 temperature of the discharge air of the compressor can be lowered, the cooling of the discharge air becomes easy, 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 times lower than before.
Since the temperature can be lowered by ° C., the material of the tip seal can be easily selected, and the life of the tip seal can be improved. In particular, in the present embodiment, since the turning scroll head plate is provided with the pressure equalizing holes 30 which communicate the compression working chambers on both sides of the head plate to balance the pressure, the thrust force acting on the turning scroll can be more balanced. The load acting on each chip seal can 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 revolving scroll in the form of a chrysanthemum instead of the round hole shown in FIG. The heat area can be increased, and the cooling effect can be improved.

FIG. 7 shows that the number of cooling holes 7 formed in the end plate of the revolving scroll is four instead of the two shown in FIG. 4, and the passage area of the intake air passing through the cooling holes 7 is increased. Increase
By reducing the passage resistance, the amount of air passing therethrough is increased, the cooling effect is improved, and cooling can be performed over the entire swirling scroll. By making the passage area of the cooling hole near the center larger than the passage area of the cooling hole formed on the outside, a cooling capacity corresponding to the amount of heat generated in the swirl scroll can be generated.

FIG. 8 shows the vertical direction as shown in FIG. 7 (the vertical direction in the figure, the direction in which the inlet side approaches the suction port 24).
The four cooling holes 7 are provided, and four transverse (horizontal) cooling holes 71 formed so as to communicate with the cooling holes 7 are also provided. FIG. 9 shows that a plurality of obliquely formed cooling holes 72 and a plurality of obliquely formed cooling holes 73 cross each other.
It is formed so as to communicate with each other at the intersection. ◆ By configuring as shown in FIGS. 8 and 9, cooling can be performed more uniformly. Fig. 10 shows a swivel scroll.
In this case, two cooling holes 74 are provided in the horizontal direction on the mirror end plate 3a. When the cooling holes are provided as shown in this figure, partitions 31, 32, and 33 are provided so that the intake air flows from left to right, for example, as shown by arrows in FIG. According to this example, the intake air flowing through the cooling holes 74 flows into the suction sides on both sides of the scroll compressor, so that the amount of cooling air flowing through the cooling holes can be increased. .

In the embodiment described above, the swirl scroll is cooled by its own intake air.
The cooling effect can be further improved by introducing another cooling fluid (for example, external air or cooled low-temperature air) from the outside and forcibly flowing the cooling fluid directly into the cooling holes formed in the swirl scroll. You can also.

[0046]

According to the embodiment described above, the following effects can be obtained. ◆ (1) Even if the orbiting scroll cannot be cooled from the outside by cooling fins or the like due to the cooling holes 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 can be reduced. Can be reduced. Thereby, 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 temperature of the discharge air of the compressor can be reduced, and the discharge gas can be easily cooled, and the reliability of the compressor can be improved.
◆ (3) In the case where the radiation fin is provided on the fixed scroll,
The fixed scroll can be efficiently cooled from the outside. ◆ (4) The temperature of the tip seal provided at the tip of each wrap of the oil-free double scroll compressor can also be reduced, which facilitates selection of the tip seal material,
In addition, the life can be improved with respect to wear. By providing a pressure equalizing hole that communicates the compression working chambers on both sides of the head with the orbiting scroll head and balances the pressure, the thrust force acting on the orbiting scroll can be more balanced.
The load acting on each chip seal can be further reduced, and the life can be increased.

[Brief description of the drawings]

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

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

FIG. 3 is a view showing a state in which the fixed scroll on the right side 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. 1;

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

FIG. 6 is a view corresponding to FIG. 5 showing a modification of the shape of the cooling hole 7 formed in the end plate of the revolving scroll.

FIG. 7 is a view corresponding to FIG. 4, showing a modification of the cooling hole formed in the end plate of the revolving scroll.

FIG. 8 is a view corresponding to FIG. 4 showing another modification of the cooling hole formed in the end plate of the revolving scroll.

FIG. 9 is a view corresponding to FIG. 4 showing another modification of the cooling hole formed in the end plate of the revolving scroll.

FIG. 10 is a view corresponding to FIG. 4 showing another modification of the cooling hole formed in the end plate of the revolving scroll.

FIG. 11 is a view for explaining a partition structure in a modification of FIG. 10 and is a view corresponding to FIG. 3;

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

[Explanation of symbols]

1: fixed left scroll, 2: fixed right scroll, 1c,
2c: heat dissipating (cooling) fin, 3: orbiting scroll, 3a
... orbiting scroll head plate, 1a, 2a, 3b ... tip seal
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 ...
Inlet, 25 ... leg, 27, 28 ... partition, A, B ... suction side (suction space).

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shigeru Machida 502 Kandamachi, Tsuchiura-shi, Ibaraki Machinery Research Laboratory, Hitachi, Ltd. (58) Field surveyed (Int. Cl. ⁶ , DB name) F04C 18/02 311

Claims (10)

(57) [Claims] 1. A swiveling scroll having lap surfaces on both sides of a head plate.
And fixed scrolls arranged on both sides of the orbiting scroll.
To the fixed scrolls arranged on both sides.
A drive shaft (clutch) that is held to orbit the orbiting scroll.
Rank shaft) and scroll pressure with auxiliary crankshaft
In the contractor, the end plate of the orbiting scroll is attached to the other end plate from the outer peripheral side of one end plate.
Is formed so as to penetrate the outer peripheral side of one end plate, and the scroll
For cooling to pass at least a part of the intake gas of the compressor
A scroll compressor comprising a hole. 2. Screws provided on both axial sides of a head plate, respectively.
Orbiting scroll having a spiral wrap, and the orbiting scroll
The left and right sides of the swivel scroll
Left with spiral wrap meshing with each of the wraps
The right fixed scroll and the left and right fixed scroll
The swivel scroll is rotatably supported via respective bearings.
A drive shaft and an auxiliary crank shaft for rotating the
Tie for synchronous rotation of drive shaft and auxiliary crankshaft
In a scroll compressor equipped with a From the outer peripheral side of one end plate to the end plate of the orbiting scroll,
Is formed so as to penetrate the outer peripheral side of one end plate, and the scroll
For cooling to pass at least a part of the intake gas of the compressor
Holes formed in the outer surfaces of the left and right fixed scrolls.
Cooling fins and a cooling fin for flowing a cooling medium through the cooling fins.
Scroll compression characterized by having a cooling fan
Machine. 3. A swivel scroll having lap surfaces on both sides of a head plate.
And fixed scrolls arranged on both sides of the orbiting scroll.
To the fixed scrolls arranged on both sides.
A drive shaft that is held to orbit the orbiting scroll; and
A scroll compressor body having an auxiliary crankshaft and
The main body of the scroll compressor is driven via a V-belt.
A motor, a starter for controlling the driving of the motor, and a compressor
A discharge pipe for guiding the gas discharged from the main body to the outside,
A check valve provided from the upstream side along the outlet pipe, Pre-cool
And after-cooler, and a cooling fan
And a housing housing the above-described device.
From the outer periphery of one end plate to the outer periphery of the other end plate
A cooling hole is formed to penetrate the
At least a part of the suction gas of the machine passes through the cooling hole.
A scroll compressor characterized in that it is configured as follows. 4. A swiveling scroll having lap surfaces on both sides of a head plate.
And fixed scrolls arranged on both sides of the orbiting scroll.
To the fixed scrolls arranged on both sides.
A drive shaft that is held to orbit the orbiting scroll; and
In a scroll compressor having an auxiliary crankshaft, The end plate of the orbiting scroll is formed on both sides of the end plate.
Communication hole that communicates with the compression working chamber, and one outer periphery of the end plate
Is formed so as to penetrate from one side to the other
Cooling at least part of the suction gas of the compressor
A scroll compressor comprising: 5. A swiveling scroll having lap surfaces on both sides of a head plate.
And fixed scrolls arranged on both sides of the orbiting scroll.
To the fixed scrolls arranged on both sides.
A drive shaft that is held to orbit the orbiting scroll; and
In a scroll compressor having an auxiliary crankshaft, Formed on the end plate of the orbiting scroll, and on both sides of this end plate
A communication hole for communicating the formed compression working chamber;
Penetrating from one outer peripheral side of the scroll head to the other
Through the scroll compressor to reduce the amount of intake gas.
A cooling hole for passing at least a part of the cooling hole,
Suction space (A) on the inlet side and suction air on the outlet side of the cooling hole
And a partition provided so as to isolate the space (B).
Scroll compressor characterized by the following. 6. A swiveling scroll having lap surfaces on both sides of a head plate.
And fixed scrolls arranged on both sides of the orbiting scroll.
To the fixed scrolls arranged on both sides.
A drive shaft that is held to orbit the orbiting scroll; and
With an auxiliary crankshaft Twist scroll moves eccentrically
Compress the fluid sucked from the suction port
In a double toothed scroll compressor, The drive shaft is connected to the end plate (body plate) of the orbiting scroll.
It is formed to penetrate in a direction perpendicular to the line connecting the rank axes.
Through at least a portion of the scroll compressor intake gas.
Scrolls having cooling holes for cooling
Compressor. 7. The method according to claim 1, wherein
The pressure formed on both sides of the end plate of the orbiting scroll
Compression working chambers (4) and (5) communicate with each other,
Balancing thrust force due to gas pressure in compression working chambers on both sides
A scroll with a plurality of pressure equalizing holes
Compressor. 8. The method according to claim 1, wherein
The tip of the spiral wrap of the fixed and orbiting scroll
Scroll compressor with seal. 9. The method according to claim 1, wherein
The cooling hole is located at the center of the orbiting scroll, which is the hottest.
Scroll compression characterized by passing through
Machine. 10. A swivel scroll having lap surfaces on both sides of a head plate.
And fixed scrolls disposed on both sides of the orbiting scroll.
Roll and roll on fixed scrolls located on both sides
A supported drive shaft for orbiting the orbiting scroll;
Scroll compressor with an auxiliary crankshaft
hand, The orbiting scroll is shaped so as to penetrate the end plate in the horizontal direction.
At least a part of the intake gas of the scroll compressor
A cooling hole to be passed therethrough, and a suction air at an inlet side of the cooling hole.
The space (A) is separated from the suction space (B) on the outlet side of the cooling hole.
It is characterized by having a partition provided to cut off
Scroll compressor.