JP2003065258A - Scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll compressor improving reliability by ameliorating abrasion resistance of Oldham ring. SOLUTION: This scroll compressor is provided in a closed container 1 with a scroll compressing element 2, a motor driving element 3, and a support frame 4 having a bearing portion 6 for journaling a rotary shaft 5 of the motor driving element 3. The scroll compressing element 2 comprises a fixed scroll provided with a swirl lap 13 erected on a surface of an end plate 11, and an oscillating scroll 8 moving around the fixed scroll 7 by drive of the motor driving element 3 while being supported by a thrust bearing surface 26 of the support frame 4, and provided with a swirl lap 16 erected on one side surface of a panel boad 15. The Oldham ring 20 is arranged for enabling the oscillating scroll 8 to move around the fixed scroll 7 and not to rotate on its axis. The Oldham ring 20 is made of aluminum material containing more than 13.0% of silicone.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to H such as R407C.
The present invention relates to a scroll compressor suitable for compressing an FC refrigerant.

[0002]

2. Description of the Related Art A conventional general scroll compressor has a fixed scroll having a head plate on which a spiral wrap made of an involute curve is erected on the surface, and a spiral wrap made of an involute curve on the surface. In addition, an orbiting scroll which has an end plate having a pair of key grooves on the back and is engaged with the fixed scroll so as to face each other, and a plurality of compression spaces formed by the orbiting scroll and the fixed scroll from the outside to the inside. The orbiting scroll is a fixed scroll having an electric element that orbits the orbiting scroll with respect to the fixed scroll so that the orbiting scroll is gradually reduced and compressed, and a pair of keys that engage with the key grooves of the orbiting scroll. On the other hand, it is configured to include an Oldham ring (joint means) that revolves so as not to rotate.

In this case, the orbiting scroll orbits while being supported by the thrust bearing surface of the support frame. The Oldham ring also has a pair of key grooves formed at a position offset by 90 degrees from the key, and a pair of keys (sintered material) protruding from the fixed scroll in the thrust bearing surface direction of the support frame.
Will engage with this keyway and slide.

[0004]

In view of the ozone layer depletion problem of the global environment, HFC refrigerants such as R407C which have no or little ozone layer depletion in recent years have been replaced by general-purpose refrigerants such as R22. It has also come to be used in a cooling device in which a scroll compressor is used. On the other hand, the Oldham ring is conventionally made of an aluminum die-cast material (for example, ADC12), and the keys of the fixed scroll are made of an iron-based sintered material, but the HFC refrigerant as described above is used. In that case, there is a problem that the sliding characteristic between the key of the fixed scroll and the key groove of the Oldham ring deteriorates.

FIG. 12 shows an Oldham ring (aluminum) in the combination of the iron-based sintered material and the aluminum die-cast material.
The results of the accelerated durability test in which the amount of wear of the key groove is measured are shown. In the figure, L3 is the amount of wear when R22 is used as the refrigerant, and L4 is the amount of wear when R407C is used (both relative comparisons). ).

As is clear from this figure, assuming that the amount of wear after 1000 hours when using the R407C refrigerant is 100%, it is 20% or less in the case of R22, and the amount of wear is 5 times that of the HFC refrigerant. Increase to above. Such severe wear of the Oldham ring significantly reduces the reliability of the scroll compressor.

Therefore, the present invention has been made in order to solve the conventional technical problems, and provides a scroll compressor in which the wear resistance of the Oldham ring is improved to improve the reliability. With the goal.

[0008]

According to another aspect of the present invention, there is provided a scroll compressor in which a scroll compression element, an electric element for driving the scroll compression element, and a rotary shaft of the electric element are centrally supported. A supporting frame having a bearing portion for supporting the scroll compression element, and the scroll compression element with respect to the fixed scroll supported by the thrust bearing surface of the support frame and the fixed scroll in which a spiral wrap is erected on the surface of the end plate. It is composed of an orbiting scroll that revolves when driven by an electric element, and a spiral wrap is erected on one surface of the end plate. It is intended to perform compression by gradually contracting toward the fixed scroll, and is an order for revolving the orbiting scroll with respect to the fixed scroll so as not to rotate. It comprises a ring, the Oldham ring, silicon is characterized in that it is made of aluminum material contained more than 13.0%.

In the scroll compressor according to a second aspect of the present invention, the aluminum material contains 16.0% silicon.
It is characterized in that the content is 18.0% or less.

According to a third aspect of the present invention, there is provided a scroll compressor in which a scroll compression element, an electric element for driving the scroll compression element, and a bearing portion for pivotally supporting a rotary shaft of the electric element are provided in the center. The scroll compression element is provided with a fixed scroll in which a spiral wrap is erected on the surface of the end plate and a thrust bearing surface of the support frame to revolve the scroll compression element by driving an electric element. A plurality of compression spaces formed by meshing both wraps with each other are gradually reduced from the outer side to the inner side. By doing so, it is provided with an Oldham ring for revolving the orbiting scroll so as not to rotate with respect to the fixed scroll. The Oldham ring, copper is 4.0%
It is characterized by being composed of an aluminum material that is contained in a larger amount.

The scroll compressor according to a fourth aspect of the present invention is characterized in that the aluminum material contains copper in an amount of more than 4.0% and 5.0% or less.

According to a fifth aspect of the present invention, there is provided a scroll compressor in which a scroll compression element, an electric element for driving the scroll compression element, and a bearing portion for pivotally supporting a rotary shaft of the electric element are provided in the center. The scroll compression element is provided with a fixed scroll in which a spiral wrap is erected on the surface of the end plate and a thrust bearing surface of the support frame to revolve the scroll compression element by driving an electric element. A plurality of compression spaces formed by meshing both wraps with each other are gradually reduced from the outer side to the inner side. By doing so, it is provided with an Oldham ring for revolving the orbiting scroll so as not to rotate with respect to the fixed scroll. The Oldham ring, silicon 1
It is characterized by being composed of an aluminum material containing more than 2.0% and containing more than 3.5% of copper.

In the scroll compressor according to the invention of claim 6, 16.0% of silicon is contained in the aluminum material.
The content of copper is 18.0% or more and the content of copper is 4.0% or more and 5.0% or less.

According to a seventh aspect of the present invention, in the scroll compressor in each of the above aspects, the fixed scroll has a pair of keys projecting from the end plate toward the support frame, and the Oldham ring allows the fixed scroll keys to slide. The invention is characterized in that a pair of key grooves that engage with each other is provided, and the key of the fixed scroll is made of an iron-based sintered material.

In the scroll compressor according to an eighth aspect of the present invention, in each of the above inventions, the object to be compressed by the scroll compression element is an HFC refrigerant.

In the scroll compressor of the ninth aspect of the present invention, the HFC refrigerant is R407C or R410.
A or R404A refrigerant.

According to the first to sixth aspects of the present invention, since the wear resistance of the Oldham ring is improved, an iron-based sintered material is used as the material of the fixed scroll key as in the seventh aspect. And R407C, R41 as claimed in claim 9.
When compressing HFC refrigerants such as 0A and R404A, even if the sliding characteristics between the key groove of the Oldham ring and the keys of the fixed scroll deteriorate, wear of the Oldham ring is suppressed and a highly reliable scroll compressor is provided. It will be something that can be provided.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a vertical cross-sectional side view of a scroll compressor S to which the present invention is applied (a cross section taken along line AA in FIG. 2), FIG. 2 is a partially cutaway top view of the scroll compressor S of FIG. 1, and FIG. 1 is a vertical side view of the scroll compressor S excluding the end cap 1B and the bottom cap 1C of FIG.
4 is a top view of the scroll compressor S of FIG. 3, and FIG. 5 is FIG.
6 is a front view of the terminal T portion of the scroll compressor S of FIG. 6, FIG. 6 is a top view of the scroll compressor S from FIG. 4, and FIG. 7 is a vertical cross-sectional side view of the scroll compression element 2 of the scroll compressor S of FIG. 8 is a bottom view of the scroll compression element 2 of FIG. 7, and FIG. 9 is a vertical cross-sectional side view of the electric element 3 and the support frame 4 of the scroll compressor S of FIG.

In each figure, reference numeral 1 denotes a closed container, which is a cylindrical main body 1A and a bowl-shaped end cap 1 welded and fixed to both upper and lower ends of the main body 1A.
B and a bottom cap 1C. Then, in the closed container 1, the scroll compression element 2 is provided on the upper side.
However, an electric element 3 as a driving means for driving the scroll compression element 2 is housed in the lower side. A support frame 4 is housed in a closed container 1 between the scroll compression element 2 and the electric element 3, and a bearing portion 6 for pivotally supporting a rotary shaft 5 is formed at the center of the support frame 4 so as to project downward. Has been done.

The scroll compression element 2 is composed of a fixed scroll 7 and an orbiting scroll 8. The fixed scroll 7 has an end cap 1B around the closed container 1
A disk-shaped end plate 11 that is shrink-fitted to the inner surface of the inner wall of the closed container 1 and divides the closed container 1 into a high-pressure chamber 9 and a low-pressure chamber 10,
It is composed of an involute shape that is erected on one surface (lower surface) of 1 or a spiral wrap 13 that is a curve that approximates this. A discharge hole 14 communicating with the high-pressure chamber 9 in the closed container 1 is formed in the central portion of the end plate 11 of the fixed scroll 7. And fixed scroll 7
Is the downward direction of the wrap 13.

The orbiting scroll 8 has a disk-shaped end plate 15,
A spiral wrap 16 which is erected on one surface (upper surface) of the mirror plate 15 or which is a curve similar to this, and the center of the other surface (lower surface) of the mirror plate 15. And a boss hole portion 17 formed to project. Then, the orbiting scroll 8 has the protruding direction of the wrap 16 as the upper side, and the wrap 16 is fixed to the fixed scroll 7.
The wraps 13 are rotated 180 degrees so as to face each other and engage with each other to form a plurality of compression spaces 18 between the inner wraps 13 and 16.

Reference numeral 19 is a pin portion provided at the tip (upper end) of the rotary shaft 5 and inserted into the boss hole 17 of the orbiting scroll 8. The center of the pin portion 19 is offset from the axis of the rotary shaft 5. It is provided in mind. An Oldham ring 20 is located between the supporting frame 4 and the lower side of the orbiting scroll 8.

As shown in FIG. 10, a pair of keys 21 and 21 are formed on the Oldham ring 20 so as to face each other at 180-degree symmetrical positions and project upward, and these keys 21 and 21.
21 has a pair of key grooves 22 and 22 formed at a position 90 degrees apart from each other and facing each other at a position symmetrical by 180 degrees.
The material of this Oldham ring 20 is ADC in the case of the embodiment.
It is composed of 14 aluminum die-cast materials. This aluminum die cast material has 1 silicon in aluminum
Contains 6.0% or more and 18.0% or less, and contains 4.0 of copper.
% To 5.0%.

On the other hand, a pair of key grooves 2 are provided at the 180-degree symmetrical position on the peripheral portion of the other surface (lower surface) of the orbiting scroll 8.
3 and 23 are formed, and the keys 21 and 21 of the Oldham ring 20 are slidably engaged in the key grooves 23 and 23. Further, as shown in FIG. 11, a pair of key members (keys) 24 having a substantially L-shaped cross section are protruded downward and fixed by screws 25 on the peripheral portion of the fixed scroll 7 at a position of 180 degrees symmetry. There is. The key members 24, 24 are made of an iron-based sintered material that retains lubricating oil between particles and can suppress deterioration of sliding characteristics in the embodiment.

The key members 24, 24 include fixing pieces 24A, 24A extending in the vertical direction and engaging pieces 24B, 24 bending inward from the lower ends of the fixing pieces and extending inward.
It is formed in an L shape as a whole from B and B. The fixing pieces 24A, 24A are screwed to the fixed scroll 7, and the lower engaging pieces 24B, 24B are in the key grooves 22, 22 of the Oldham ring 20. Slidably engage with. At this time, the engagement pieces 24B and 24B of the key members 24 and 24 project to the lower side (the electric element 3 side) of the thrust bearing surface 26 of the support frame 4 described later. Due to this engagement relationship, the Oldham ring 20 revolves around the circular orbit so that the orbiting scroll 8 does not rotate with respect to the fixed scroll 7.

The thrust bearing surface 26 for supporting the orbiting scroll 8 is formed in the central portion of the support frame 4, and the outer side of the thrust bearing surface 26 is inwardly displaced from the peripheral portion at a position displaced by 90 degrees. 4 are cut out toward the mounting arm 2 protruding outward and downward from the thrust bearing surface 26 by these four cutouts 27.
8 ... are formed with their positions shifted by 90 degrees. Two screw holes 29 are formed on the upper surface of the peripheral edge of each of the mounting arms 28 ... Further, pin holes 32, 32 for inserting the positioning pin 31 are formed between the screw holes 29, 29 of the pair of mounting arms 28, 28 facing each other.

The mounting arm 28 of the support frame 4
.., that is, the outer diameter of the support frame 4 is the closed container 1
It is set to be smaller than the inner diameter of the main body 1A.

On the other hand, a total of eight screw holes 33 are formed in the peripheral portion of the end plate 11 of the fixed scroll 7 at positions corresponding to the screw holes 29 ... Pin holes 34, 34 are formed at positions corresponding to the pin holes 32, 32 on the peripheral portion of the surface (lower surface), respectively. Then, with the positioning pin 31 inserted into the pair of pin holes 32 and 34, the screw 36 is inserted into the screw hole 33, ... And screwed into the screw hole 29 of the support frame 4. By
The fixed scroll 7 is fixed to the support frame 4. As a result, the support frame 4 is fixed to the end cap 1B of the closed container 1 via the fixed scroll 7.

On the other hand, the electric element 3 is composed of a stator (stator) 38 and a rotor 39 rotating in the stator 38, and the rotary shaft 5 is fitted to the center of the rotor 39. And forms a part of the rotor 39. A crank portion 41 pivotally supported by the bearing portion 6 of the support frame 4 is formed below the pin portion 19 at the tip of the rotary shaft 5, and the lower portion of the rotary shaft 5 (below the rotor 39) is a sub bearing. 42 is pivotally supported. This sub bearing 42 is the main body 1A of the closed container 1.
It is pressed into the inner surface.

Screw holes 43 are formed through the auxiliary bearing 42 at a plurality of positions, and through holes 44 are also formed in the stator 38 of the electric element 3 at positions corresponding to the screw holes 43.
Further, screw holes 46 are formed on the lower surface of the mounting arms 28 of the support frame 4 at positions corresponding to the through holes 44. Then, the screw 47 is inserted into the screw hole 43 of the auxiliary bearing 42, penetrates the through hole 44 of the stator 38, and is screwed into the screw hole 46 of the support frame 4, whereby the auxiliary bearing 42, the electric element 3, and the support are supported. It is integrated with the frame 4, and the electric element 3 and the support frame 4 are fixed to the main body 1A of the closed container 1 via the sub bearing 42.

The body 1A of the closed container 1 is provided with a flat seat pressing portion 49 having a shape as shown in FIG. The seat pusher 49 is configured by pushing the main body 1A inward from the outside, and the terminal T connected to the electric element 3 is attached to the seat pusher 49. The seat push portion 49 needs to be positioned above the electric element 3 at the height (side) of the support frame 4, but as shown in FIG. 6, the seat push portion 49 is a cutout portion (mounting arm) of the support frame 4. Part 2
The support frame 4 is mounted so as to be located within (between 8 and 28) 27. On the other hand, the key member 2 of the fixed scroll 7
4 and 24 are notches 27 and 9 where the seat pusher 49 is located.
Notch at 0 degree offset (between mounting arms 28, 28)
27, 27, that is, the fixed scroll 7 and the rocking member 7 are swung so that the key members 24, 24 of the fixed scroll 7 are positioned at a position substantially 90 degrees away from the seat pressing portion 49 to which the terminal T is attached. Scroll 8, Oldham ring 2
Place 0.

The key member 2 of the fixed scroll 7 as described above.
Since the reference numerals 4 and 24 project below the thrust bearing surface 26 of the support frame 4, when the key member 24 is located in the direction of the terminal T, the key member 24 and the terminal T interfere with each other. Although it is necessary to increase the position of the scroll compression element 2 to increase the size of the scroll compressor S, since the key member 24 and the terminal T are displaced by about 90 degrees as described above, such interference occurs. Therefore, it becomes possible to prevent the dimensional expansion.

When the seat pressing portion 49 is pushed, the main body 1A
However, since the outer diameter of the support frame 4 is set to be smaller than the inner diameter of the main body 1A of the closed container 1 as described above, the support frame 4 is deformed even when inserted into the main body 1A. The support frame 4 is pressed by the main body 1A, and the risk of distortion is eliminated.

Reference numeral 51 denotes a suction pipe attached to the lower portion of the main body 1A of the closed container 1, and the suction pipe 51 communicates with the low pressure chamber 10 in the closed container 1 below the electric element 3. 52
Is a discharge pipe attached to the end cap 1B of the closed container 1, and the discharge pipe 52 is a high pressure chamber 9 in the closed container 1.
Is in communication with. The cutouts 27 ... Of the support frame 4 serve as passages for guiding the refrigerant from the low pressure chamber 10 to the scroll compression element 2.

Reference numerals 54 and 56 denote balancers (balance weights) attached to the rotary shaft 5 of the rotor 39 of the electric element 3 by shrink fitting or press fitting, and the balancer 5 on the upper side.
4 is attached to the rotating shaft 5 above the coil end at the upper end of the rotor 39 at a position symmetrical to the pin portion 19 with respect to the axis of the rotating shaft 5, and the lower balancer 56 rotates on the same side as the pin portion 19. It is attached to the rotary shaft 5 between the coil end at the lower end of the child 39 and the sub bearing 42.

In particular, the upper balancer 54 is the rotor 39.
Of the bearing frame 6 of the support frame 4 and the outer diameter of the stator 39 is larger than the outer diameter of the rotor 39 above the coil end of the stator 39. The upper portion is located on the outer circumference of the bearing portion 6 of the support frame 4. As a result, the balancer 5
The center of gravity (indicated by arrow R in FIG. 9) of the eccentric portion of 4 is moved upward and brought close to the orbiting scroll 8 to be positioned on the outer periphery of the bearing portion 6. As a result, the balancer 54 is lightened, and the generation of vibration due to the eccentric movement of the pin portion 19 is effectively eliminated. Further, the flexure of the rotary shaft 5 is reduced, and the disadvantage that the crank portion 41 hits the bearing portion 6 one-sided can be suppressed.

Next, 61 is an end plate 11 of the fixed scroll 7.
Is a discharge valve attached to the other surface (the upper surface opposite to the wrap 13). This discharge valve 61 is used for the end plate 1
A frame body 63 having a substantially gate-shaped cross-section attached by screws 62, 62 corresponding to one discharge hole 14, and a moving space portion 64 formed in the frame body 63 so as to open laterally and downward. And a disc-shaped valve body 66 that is vertically movable. The center of the valve element 66 coincides with the center of the discharge hole 14. A contact surface 67 is formed on the upper surface of the moving space 64 of the frame 63.

Further, a total of two first and second communication passages 68, 69 are formed through the upper wall of the frame 63, and the lower ends of the communication passages 68, 69 are opened at the contact surface 67. However, the upper end is open to the high pressure chamber 9. Both the communication passages 68, 69 extend in the vertical direction, and the first communication passage 68 is open at the contact surface 67 at a portion corresponding to a position deviated from the center of the valve body 66. On the other hand, the second communication passage 69 is located at a position corresponding to the lower center of the end cap 1B.
A through hole 71 is formed at the center of B. Then, a pipe 72, which is a part of a temperature detecting device (not shown), is inserted into the second communication passage 69, and the pipe 72 has a through hole 7
It passes through 1 and is pulled out. This pipe 72
A temperature sensing unit of the temperature detecting device is built in the inside.

Next, the procedure for assembling the scroll compressor S of the present invention will be described. First, the rotary shaft 5 is fitted to the rotor 39 of the electric element 3, and the balancers 54 and 56 are attached to the rotary shaft 5 by press fitting or shrink fitting to be assembled. Then, the stator 38 of the electric element 3 is placed on the sub bearing 42, and the through hole 44 is aligned with the screw hole 43. Next, the rotor 3 in which the rotary shaft 5 and the balancers 54 and 56 are assembled
9 is inserted into the stator 38, and the lower portion of the rotary shaft 5 is attached to the auxiliary bearing 4
2 is pivoted. Next, the support frame 4 is covered on the stator 38, the screw holes 46 are aligned with the through holes 44, and the crank portion 41 of the rotary shaft 5 is inserted into the bearing portion 6 to be pivotally supported. Then, as described above, the screw 47 is inserted from the side of the auxiliary bearing 42 in the order of the screw hole 43, the through hole 44, and the screw hole 46, and finally screwed into the screw hole 46, whereby the support frame 4 and the electric element 3 are connected. And the sub bearing 42 is assembled in advance and integrated. This is the state shown in FIG.

On the other hand, the fixed scroll 7 is placed with the wrap 13 facing upward, and the orbiting scroll 8 with the wrap 16 facing downward is put on the fixed scroll 7 to engage the wraps 13 and 16. Next, attach the Oldham ring 20 to the keys 21 and 21.
On the orbiting scroll 8 with the key 21
21 is engaged in the key grooves 23, 23 of the orbiting scroll 8. Next, the keys 21 and 21 and the key grooves 23 and 23
The key member 2 on the fixed scroll 7 at a position deviated by 90 degrees
4, 24 are screwed and engaged in the respective key grooves 22, 22 in a state of protruding above the Oldham ring 20.
In this way, the scroll compression element 2 as shown in FIG.
Assemble.

Next, as shown in FIG. 9, the support frame 4, the electric element 3 and the auxiliary bearing 42 are assembled in advance, the main body 1A of the closed container 1 is covered from above, and the whole is inserted into the main body 1A.
The sub bearing 42 is press-fitted and fixed to the inner surface of the main body 1A. Next, the positioning pins 31 and 31 are inserted into the pin holes 32 and 32 of the support frame 4 as described above. Next, the scroll compression element 2 preassembled as shown in FIG. 7 is placed on the main body 1A with the Oldham ring 20 side facing down, and the positioning pin 31,
31 is inserted into the pin holes 34, 34 of the fixed scroll 7, and the screw holes 33 ... Are screw holes 29.
.. and the pin portion 19 of the rotary shaft 5 is engaged with the boss hole portion 17 of the orbiting scroll 8. Then, as described above, the screw 36 is screwed from the fixed scroll 7 side to the screw hole 33 ...
, And is screwed into the screw holes 29 of the support frame 4 to be fixed. Then, the discharge valve 61 is made to correspond to the discharge hole 14 of the end plate 11 of the fixed scroll 7, and the screws 62, 62
It is fixed to the end plate 11 at
Plug in. This state is the state shown in FIG.

Next, the end cap 1B is shrink-fitted around the end plate 11 of the fixed scroll 7, and a high and low pressure seal is applied to cover the main body 1A.
The pipe 72 standing up as described above is inserted into the through hole 71 of the end cap 1B, and then the end cap 1B is shrink-fitted to the end plate 11 to cover the main body 1A. At this time, since the communication passage 69 is located at the position corresponding to the center of the end cap 1B as described above, the pipe 72 also corresponds to the center of the end cap 1B, and the end cap 1B is attached to the main body 1A while being inserted into the through hole 71. By covering, the end cap 1B is positioned with respect to the main body 1A, and the assembling becomes easy. Further, the restriction on the rotation direction at the time of shrink fitting is relaxed.

Thus, the end plate 11 of the fixed scroll 7
After the end of the end cap 1B is shrink-fitted onto the inner surface of the end cap 1B and the main body 1A is covered with the end cap 1B,
The periphery of B is welded and fixed to the main body 1A. Then, the bottom cap 1C is covered on the lower end of the main body 1A, and the periphery is welded and fixed. Then, other pipes are attached to the closed container 1 to complete the scroll compressor S. In this state, the scroll compression element 2, the support frame 4, the electric element 3, and the auxiliary bearing 42 are integrated in this order from the top, and there are two points, that is, the shrink fitting portion around the end plate 11 of the fixed scroll 7 and the press fitting portion of the auxiliary bearing 42. It will be held in the closed container 1.

Then, the sealed container 1 of the scroll compressor S is filled with a predetermined amount of R407C refrigerant (HFC refrigerant; R410A, R404A, etc. can be applied) as a refrigerant.

Next, the operation of the scroll compressor S of the present invention will be described. When the rotor 39 of the electric element 3 is rotated by the power supply from the terminal T, the rotational force is transmitted to the orbiting scroll 8 via the rotary shaft 5.

That is, the orbiting scroll 8 is driven by the boss hole portion 17 inserted into the pin portion 19 of the rotary shaft 5 eccentrically with respect to the axis of the rotary shaft 5, and the Oldham ring 20 with respect to the fixed scroll 7. Can be revolved in a circular orbit so that it does not rotate. Then, the fixed scroll 7 and the orbiting scroll 8 gradually reduce the compression space 18 formed between these wraps 13 and 16 from the outside to the inside, and from the suction pipe 51 to the low pressure chamber in the closed container 1. The refrigerant flowing into the flow path 10 and passing through the electric element 3 and the cutouts 27 of the support frame 4 is compressed.

The compressed refrigerant is discharged from the discharge hole 14 of the fixed scroll 7 into the high pressure chamber 9,
The valve element 66 of the discharge valve 61 is lifted by the high-pressure refrigerant discharged from the lower discharge hole 14, separates from the discharge hole 14 to open the discharge hole 14, and is brought into close contact with the contact surface 67. The refrigerant discharged from the discharge holes 14 moves in the moving space 64.
It enters into the high-pressure chamber 9 through the side opening and is discharged from the discharge pipe 52 to the outside of the closed container 1.

Here, the rotational force of the electric element 3 is transmitted to the orbiting scroll 8 via the rotary shaft 5, and the orbiting scroll 8 is rotated.
When it revolves, the Oldham ring 20 makes a linear reciprocating motion, and the engagement piece 24B of the key member 24 of the fixed scroll 7 is moved.
Will slide back and forth in the key groove 22 of the Oldham ring 20. As described above, the Oldham ring 20 contains 16.0% or more and 18.0% or less of silicon and 4.0% of copper. % And 5.0% or less of aluminum die cast material (ADC14), the abrasion resistance is improved as compared with the conventional case.

L1 and L2 in FIG. 12 represent the results of the accelerated durability test in which the wear amount of the key groove 22 of the Oldham ring 20 in the combination of the aluminum die cast material (ADC14) and the iron-based sintered material was measured, In the figure, L2 is the wear amount when R22 is used as the refrigerant, and L1 is R407C.
Is the amount of wear when using (all are relative comparisons).

As described above, H such as R407C is used as the refrigerant.
When the FC refrigerant is used, the sliding characteristics between the iron-based sintered material key member 24 and the aluminum die cast material Oldham ring 20 are lower than those when the R22 refrigerant is used.
As is clear from this figure, according to the Oldham ring 20 of the present invention, it is 100% when R22 refrigerant is used.
If the amount of wear after 0 hours was about 10%, R
It can be seen that even when the 407C refrigerant is used, it can be suppressed to 20% or less.

As a result, even when the HFC refrigerant is used in response to the ozone layer depletion problem, the wear of the key groove 22 of the Oldham ring 20 can be suppressed, and the reliability of the scroll compressor S can be significantly improved. Like

In the embodiment, the material of the Oldham ring 20 is aluminum with silicon of 16.0% or more.
8.0% or less and copper 4.0% to 5.0%
Although the aluminum die cast material ADC14 included below was adopted, the present invention is not limited to this, and attention is paid only to silicon, and the aluminum die cast material or silicon in which the silicon content is greater than 13% in aluminum is 16.0% or more. 0
%, It is expected that the reliability will be improved by improving the wear resistance even with an aluminum die cast material. Also, paying attention only to copper, the wear resistance of the aluminum die-cast material containing more than 4.0% of the copper and the aluminum die-cast material containing more than 4.0% and 5.0% or less of copper also has wear resistance. Improvement can be expected. Further, even in the case of an aluminum die cast material containing silicon in an amount of more than 12.0% and copper in an amount of more than 3.5%, improvement in reliability due to improved wear resistance can be expected.

In the embodiment, the key member 24 of the fixed scroll 7 is made of an iron-based sintered material. However, the invention is not particularly limited to this, and can be used as a scroll compressor in terms of performance. If so, other materials may be used. Further, in the inventions of claims 1 to 7, the refrigerant to be compressed is not limited to the HFC refrigerant such as R407C, and
The HFC is not limited to the R407C refrigerant, but may be the R4 described above.
The present invention is also effective for other HFC refrigerants such as 10A and R404A.

[0054]

As described in detail above, the first to sixth aspects of the invention are described.
According to the invention, since the abrasion resistance of the Oldham ring is improved, an iron-based sintered material is used as the material of the fixed scroll key as in claim 7, and R407C as in claim 8 and claim 9, When compressing R410A, R404A and other HFC refrigerants, wear of the Oldham ring is suppressed and a highly reliable scroll compressor is provided even if the sliding characteristic between the key groove of the Oldham ring and the key of the fixed scroll deteriorates. It will be something that can be provided.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view of a scroll compressor to which the present invention is applied (cross section taken along the line AA in FIG. 2).

2 is a partially cutaway top view of the scroll compressor of FIG. 1. FIG.

FIG. 3 is a vertical sectional side view of the scroll compressor of FIG. 1 excluding an end cap and a bottom cap of a closed container.

FIG. 4 is a top view of the scroll compressor of FIG.

5 is a front view of a terminal portion of the scroll compressor shown in FIG. 1. FIG.

6 is a top view of FIG. 4 with the scroll compression element removed.

7 is a longitudinal side view of a scroll compression element of the scroll compressor of FIG.

8 is a bottom view of the scroll compression element of FIG. 7. FIG.

9 is a vertical side view of an electric element and a support frame of the scroll compressor of FIG. 1. FIG.

10 is a perspective view of an Oldham ring of the scroll compressor of FIG. 1. FIG.

11 is a perspective view of a fixed scroll of the scroll compressor of FIG. 1. FIG.

FIG. 12 is a diagram showing a result of comparison of wear amounts of a combination of an iron-based sintered material and an aluminum die cast material.

[Explanation of symbols]

S scroll compressor 1 closed container 1A body 2 scroll compression element 3 electric elements 5 rotation axes 7 fixed scroll 8 swing scroll 20 Oldham Ring 21 key 22, 23 keyway 24 key members 38 Stator 39 rotor

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor registration             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F term (reference) 3H029 AA14 AB03 BB24 BB44 CC08                       CC30 CC38                 3H039 AA03 AA04 AA12 BB02 BB04                       CC16 CC35

Claims (9)

[Claims] 1. A scroll compression element, an electric element for driving the scroll compression element, and a support frame having a bearing portion for supporting a rotation shaft of the electric element in the center are provided in a hermetic container. The scroll compression element is supported by the fixed scroll in which a spiral wrap is erected on the surface of the end plate and the thrust bearing surface of the support frame, and revolves by driving the electric element with respect to the fixed scroll, A plurality of compression spaces, which are formed by an orbiting scroll in which a spiral wrap is erected on one surface, are formed by meshing the two wraps with each other. In the scroll compressor for performing the above, an Oldham ring for revolving the orbiting scroll with respect to the fixed scroll so as not to rotate is provided. A scroll compressor being characterized in that constitutes the Oldham ring, an aluminum material containing a large amount of silicon is 13.0%. 2. Silicon is contained in the aluminum material.
The scroll compressor according to claim 1, wherein the scroll compressor is contained in an amount of 6.0% or more and 18.0% or less. 3. A scroll compression element, an electric element for driving the scroll compression element, and a support frame having a bearing portion for supporting a rotating shaft of the electric element in the center are provided in a hermetic container. The scroll compression element is supported by the fixed scroll in which a spiral wrap is erected on the surface of the end plate and the thrust bearing surface of the support frame and revolves by driving the electric element with respect to the fixed scroll, A plurality of compression spaces formed by oscillating scrolls in which spiral wraps are erected on one surface are erected, and the plurality of compression spaces are gradually compressed from the outside to the inside to compress In the scroll compressor for performing the above, an Oldham ring for revolving the orbiting scroll with respect to the fixed scroll so as not to rotate is provided. A scroll compressor, characterized in that the Oldham ring was made of aluminum material which copper is contained more than 4.0%. 4. The aluminum material contains 4.0% copper.
The scroll compressor according to claim 3, wherein the scroll compressor is contained in an amount of 5.0% or less. 5. A scroll compression element, an electric element for driving the scroll compression element, and a support frame having a bearing portion for pivotally supporting a rotating shaft of the electric element in the center are provided in a hermetic container. The scroll compression element is supported by the fixed scroll in which a spiral wrap is erected on the surface of the end plate and the thrust bearing surface of the support frame, and revolves by driving the electric element with respect to the fixed scroll, A plurality of compression spaces, which are formed by an orbiting scroll in which a spiral wrap is erected on one surface, are formed by meshing the two wraps with each other. In the scroll compressor for performing the above, an Oldham ring for revolving the orbiting scroll with respect to the fixed scroll is provided. , The Oldham ring, silicon is contained more than 12.0 percent, and, scroll compressor, characterized by being configured of an aluminum material which copper is contained more than 3.5%. 6. The aluminum material contains 1 silicon.
Contains 6.0% or more and 18.0% or less, and contains 4.0 of copper.
% Or more and 5.0% or less is contained.
Scroll compressor. 7. The fixed scroll includes a pair of keys protruding from the end plate toward the support frame, and the Oldham ring has a pair of key grooves with which the keys of the fixed scroll slidably engage. The scroll compressor of claim 1, claim 2, claim 3, claim 4, claim 5, or claim 6, wherein the fixed scroll key is made of an iron-based sintered material. . 8. The object to be compressed by the scroll compression element is an HFC refrigerant, claim 1, claim 2, claim 3, claim 4, claim 5, claim 6, or claim 6. 7 scroll compressor. 9. The HFC refrigerant is R407C or
The scroll compressor according to claim 8, wherein the scroll compressor is R410A or R404A refrigerant.