JP2008151009A - Scroll compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-quality and highly reliable scroll compressor, by restraining the occurrence of trouble caused by seizure and abrasion powder of a coating film, by improving performance by minimizing a tip clearance. <P>SOLUTION: This scroll compressor has a fixed scroll member 12 and a turning scroll member 13. The coating films 40A and 40B are selectively arranged on tip surfaces 12E and 13E of a spiral lap and/or bottom surfaces 12F and 13F of spiral laps 12B and 13B in the fixed scroll member 12 and/or the turning scroll member 13. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a scroll compressor configured by combining a fixed scroll member and a turning scroll member.

  The scroll compressor is configured by a compression mechanism combining a pair of fixed scroll members and a turning scroll member. Further, a tip seal groove along the spiral direction is provided on the tip surface of the spiral wrap of both scroll members, and a tip seal portion (chip) is fitted by fitting and mounting the chip seal member in the tip seal groove. The gap) is sealed to reduce gas leakage and improve compression efficiency.

  On the other hand, in the scroll compressor as described above, in order to seal the tip gap and the gap between the side surfaces of the wrap, PTFE or the like is provided on the surface of the spiral wrap and the tooth bottom surface of at least one of the fixed scroll member and the orbiting scroll member. Conventionally, those coated with a fluorine resin film, PTFE composite electroless nickel plating, DLC (Diamond Like Carbon) film, or the like are known (see, for example, Patent Documents 1, 2, 3, and 4).

JP-A 64-69788 JP 2003-42078 A JP 2001-304151 A JP 2001-115959 A

  By the way, in the scroll compressor, in order to improve the compression performance, it is necessary to make the tip gap as small as possible and reduce gas leakage. However, when the tip gap is made small, the tip surface of the spiral wrap is moved to the other scroll member. There is a risk of contact with the lap tooth base and seizure. For this reason, the actual situation is that the chip gap is set in the conflicting demands of improving performance and ensuring reliability.

  Moreover, in the thing of patent document 1 thru | or 4 which provided the coating film, such as PTFE, on the surface of a scroll member, even if the lap tip surface and tooth bottom surface of a scroll member contact, metals remain in direct contact While it is possible to suppress the occurrence of seizure without sliding, it is inevitable that a lot of wear powder is generated due to the progress of wear of the coating film. In particular, the coating film is almost always provided on the entire surface including the wrap tip surface, the wrap side surface, and the lap tooth bottom surface on one side where the spiral wrap of the scroll member end plate is erected, There is a concern that the amount of generation increases and this wear powder is caught in the sliding portion to cause trouble, or it circulates in the refrigerant circuit and causes clogging of various valves.

  The present invention has been made in view of such circumstances, and while improving the performance by reducing the gap between the chips as much as possible, it suppresses the occurrence of troubles caused by seizure and wear powder of the coating film. An object of the present invention is to provide a high-quality and highly reliable scroll compressor.

In order to solve the above problems, the scroll compressor of the present invention employs the following means.
That is, the scroll compressor according to the present invention has a fixed scroll member in which a fixed spiral wrap is integrally provided on one surface of the fixed end plate, and a swirl spiral wrap is integrally provided on one surface of the revolving end plate. A scroll scroll member that is combined with the fixed scroll member so as to be driven to revolve while being prevented from rotating, and forms a compression chamber, wherein the fixed scroll member and / or the orbiting scroll is provided. A coating film is selectively provided on a tip surface of the spiral wrap and / or a tooth bottom surface of the spiral wrap in the member.

  According to the present invention, since the coating film is selectively provided on the tip surface of the spiral wrap and / or the tooth bottom surface of the spiral wrap in the fixed scroll member and / or the orbiting scroll member, the tip seal of each spiral wrap is provided. Since the conformability of the portion can be improved and the gap between the portions can be made as small as possible, gas leakage from the tip seal portion can be reduced and the compression efficiency can be improved. Further, even if the tip surface and the tooth bottom surface of the spiral wrap of each scroll member come into contact with each other depending on the operation state, the coating film is interposed and direct contact between the metals is avoided, so that seizure at that portion is suppressed. be able to. In addition, since the coating film is selectively provided only on the limited portions of the tip surface and the tooth bottom surface of the spiral wrap, generation of wear powder can be minimized. Therefore, it is possible to suppress a failure or an accident that occurs due to the wear powder being caught in the sliding portion or the like.

  Furthermore, the scroll compressor according to the present invention includes a fixed scroll member in which a fixed spiral wrap is erected integrally on one surface of the fixed end plate, and a swirl spiral wrap is integrally erected on one surface of the revolving end plate. And a revolving scroll member that is combined with the fixed scroll member so as to be driven to revolve while being prevented from rotating, to form a compression chamber, in the scroll compressor, the revolving end plate of the revolving scroll member, etc. A coating film having heat resistance and slidability is selectively provided at a sliding portion of the surface with respect to the thrust bearing surface.

  According to the present invention, the coating film having heat resistance and slidability is selectively provided on the sliding portion of the orbiting scroll member on the other surface of the orbiting end plate with respect to the thrust bearing surface. Even if the tip surface and the tooth bottom surface contact each other and the thrust load acting on the orbiting scroll member increases due to the increase in surface pressure, the coating film is interposed and sliding due to direct contact between metals is avoided. The seizure on the sliding surface with the bearing surface can be suppressed. Further, since the coating film is selectively provided only on the sliding portion with respect to the thrust bearing surface, the generation of wear powder can be minimized. Therefore, it is possible to suppress a failure or an accident that occurs due to the wear powder being caught in the sliding portion or the like.

  Furthermore, the scroll compressor according to the present invention includes a fixed scroll member in which a fixed spiral wrap is erected integrally on one surface of the fixed end plate, and a swirl spiral wrap is integrally erected on one surface of the revolving end plate. A scroll scroll member that is combined with the fixed scroll member so as to be driven to revolve while being prevented from rotating, and forms a compression chamber, the scroll compressor comprising: A coating film having heat resistance and slidability is selectively provided on a sliding portion of the tip surface, the tooth bottom surface of the spiral wrap, and the thrust bearing surface of the other surface of the swivel end plate.

  According to the present invention, the tip end surface of the spiral wrap and the tooth bottom surface of the spiral wrap in the orbiting scroll member and the sliding portion of the other surface of the orbiting end plate with respect to the thrust bearing surface are selectively heat resistant and slidable. Since the coating film is provided, the conformability of the tip seal part of each spiral wrap can be improved and the gap between the parts can be made as small as possible, reducing gas leakage from the tip seal part and compressing it. Efficiency can be improved. Moreover, even if the thrust load of the orbiting scroll member increases due to the contact pressure between the tip surface and the tooth bottom surface of the spiral wrap of each scroll member depending on the operating state, or due to the contact pressure increase due to the contact, each coating film is interposed, Since sliding due to direct contact between metals is avoided, seizure at the tip surface or thrust surface of each spiral wrap can be suppressed. In addition, the coating film is selectively provided only on the tip and bottom surfaces of the spiral wrap and the limited area of the sliding surface relative to the thrust bearing surface. It is possible to suppress a failure or an accident that occurs due to being caught in the moving part or the like. Moreover, a coating film should just be provided in only one component of a turning scroll member, and can be produced efficiently.

  Furthermore, the scroll compressor according to the present invention is the scroll compressor according to any one of the above-described scroll compressors, wherein the fixed scroll member and the orbiting scroll member are fitted and attached to a tip seal groove provided on a front end surface of the spiral wrap. A tip seal member is provided, and the coating film is provided on at least a portion of the spiral wrap tip surface of the fixed scroll member and / or the orbiting scroll member excluding the tip seal groove.

According to the present invention, the fixed scroll member and the orbiting scroll member include the tip seal member fitted and mounted in the tip seal groove provided on the tip surface of the spiral wrap, and the spiral of the fixed scroll member and / or the orbiting scroll member is provided. Since the coating film is provided on at least the tip seal groove except the tip seal groove, even if the tip seal member is provided, it is provided at least on the spiral wrap tip surface except the tip seal groove. The coating film can improve the conformability of the tip seal part and make the gap between the parts as small as possible, thereby reducing gas leakage from the tip seal part and improving the compression efficiency. . Further, even if the tip surface and the tooth bottom surface of the spiral wrap of each scroll member come into contact with each other depending on the operation state, the coating film is interposed and direct contact between the metals is avoided, so that seizure at that portion is suppressed. be able to. Further, since the coating film is selectively provided only in a limited part, the generation of wear powder can be minimized. Therefore, it is possible to suppress a failure or an accident that occurs due to the wear powder being caught in the sliding portion or the like.
In the present invention, the coating film is provided at least on the tip end surface of the spiral wrap except for the chip seal groove, but this does not prevent the coating film from being provided in the chip seal groove.

  Furthermore, the scroll compressor of the present invention is characterized in that, in any of the scroll compressors described above, the coating film is composed of a fluorine resin film.

  According to the present invention, since the coating film is composed of a fluorine resin film, heat resistance and sliding properties can be sufficiently ensured by the characteristics of the fluorine resin, and seizure resistance and wear resistance can be ensured. Can be improved.

  Furthermore, the scroll compressor according to the present invention is characterized in that, in the scroll compressor, the fluorine-based resin coating is composed of a polytetrafluoroethylene coating.

  According to the present invention, since the fluororesin coating is composed of a polytetrafluoroethylene coating, the seizure resistance can be further improved not only by heat resistance and slidability but also by its self-lubricating property.

  Furthermore, the scroll compressor according to the present invention is characterized in that, in any of the scroll compressors described above, the coating film is coated on an anodized film.

In the present invention, since the coating film is coated on the anodized film, the adhesion of the coating film can be improved.
The anodized film is applied to, for example, one scroll member when the scroll member is made of an aluminum alloy.

  Furthermore, the scroll compressor according to the present invention is characterized in that, in any of the scroll compressors described above, the coating film is coated on a shot blast treatment as a base.

  According to the present invention, since the coating film is coated on the shot blast treatment, the adhesion of the coating film can be improved.

  Furthermore, the scroll compressor of the present invention is characterized in that, in any of the scroll compressors described above, the coating film is coated by screen printing.

Screen printing is a printing method in which holes are made in a flexible plate itself, and a printing medium is rubbed from the plate to be printed on the printing material, which can be easily printed on the surface of the printing material including metal. is there.
According to the present invention, since the coating film is coated by the above-described screen printing, the coating film as the printing medium can be accurately and easily coated only on a limited portion of the scroll member that is the printing object. Can do. Therefore, a scroll member in which only a specific portion is coated with a coating film can be easily manufactured at low cost.

  Furthermore, the scroll compressor according to the present invention is characterized in that, in any of the scroll compressors described above, the coating film is coated by pad printing.

Pad printing is a printing method in which a printing medium is transferred onto a flexible pad, and the pad is pressed against the printed material to be printed on the printed material. Can be printed easily.
According to the present invention, since the coating film is coated by the above pad printing, the coating film as a printing medium can be accurately and easily coated only on a limited portion of the scroll member that is the printing object. Can do. Therefore, a scroll member in which only a specific portion is coated with a coating film can be easily manufactured at low cost.

  Furthermore, the scroll compressor of the present invention is characterized in that, in any of the scroll compressors described above, the coating film is coated with a roll coater.

The roll coater coats the coating medium on the required part of the coating material by applying the coating medium on the rotating roll and passing the coating material between the rolls. Is possible.
According to the present invention, since the coating film is coated by the roll coater described above, the coating film as the medium to be coated can be accurately and easily coated only on a limited portion of the scroll member that is the coating material. Can do. Therefore, a scroll member in which only a specific portion is coated with a coating film can be easily manufactured at low cost.

  The scroll compressor according to the present invention is characterized in that, in any of the scroll compressors described above, the coating film is composed of a Sn-impregnated anodized film.

  According to the present invention, since the coating film is composed of the Sn-impregnated anodized film, the heat resistance and slidability can be sufficiently ensured due to the characteristics of the Sn-impregnated anodized film, and seizure resistance can be ensured. And wear resistance can be improved.

  According to the present invention, by reducing the gap between the tip seal portions of the spiral wrap as much as possible, gas leakage can be reduced and compression efficiency can be improved. In addition, even if the tip surface and the tooth bottom surface of the spiral wrap of the scroll member are in direct contact with each other, the coating film is interposed, and sliding due to direct contact between metals is avoided. Burn-in can be suppressed. Furthermore, since the coating film is selectively provided only on a limited part, the generation of wear powder is minimized, and troubles caused by wear powder being bitten into the sliding portion or the like are suppressed. be able to.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
FIG. 1 shows a cross-sectional view of a scroll compressor 1 according to this embodiment. The scroll compressor 1 has a housing 2 that constitutes its outline. The housing 2 includes a front housing 3 and a rear housing 4 made of aluminum alloy, and each flange portion is fixed in a state of being integrally tightened by a bolt (not shown).

A crankshaft 5 is supported inside the front housing 3 via a main bearing 6 and a sub-bearing 7 so as to be rotatable around its axis L. One end side (left side in the drawing) of the crankshaft 5 is a small diameter shaft portion 5A, and this small diameter shaft portion 5A penetrates the front housing 3 and protrudes to the left side in FIG. As is well known, an unillustrated electromagnetic clutch, pulley, and the like for receiving power are provided on the protruding portion of the small diameter shaft portion 5A, and power is transmitted from a drive source such as an engine (not shown) via a V belt. It is like that.
A mechanical seal (lip seal) 8 is installed between the main bearing 6 and the sub-bearing 7, and hermetically seals the inside of the housing 2 and the atmosphere.

  A large-diameter shaft portion 5B is provided on the other end side (right side in the drawing) of the crankshaft 5. Further, the large-diameter shaft portion 5B has an eccentric pin that is eccentric from the axis L of the crankshaft 5 by a predetermined dimension. 5C is provided integrally. The large-diameter shaft portion 5B and the small-diameter shaft portion 5A are rotatably supported by the front housing 3 via the main bearing 6 and the sub bearing 7, respectively. The eccentric pin 5C is connected to a turning scroll member 13 to be described later via a drive bush 9 and a drive bearing 10, and the turning scroll member 13 is driven to turn by rotating the crankshaft 5. ing.

The drive bush 9 is provided with a balance weight 9 </ b> A for removing an unbalanced load that is generated when the orbiting scroll member 13 is orbitally driven.
Also, a pair of aluminum alloy fixed scroll member 12 and orbiting scroll member 13 constituting the scroll compression mechanism 11 are incorporated in the housing 2. The fixed scroll member 12 is composed of a fixed end plate 12A and a fixed spiral wrap 12B standing from the fixed end plate 12A. On the other hand, the orbiting scroll member 13 is composed of the orbiting end plate 13A and the orbiting end plate 13A. The swirl spiral wrap 13B is erected.

  Tip seal grooves 12C and 13C are provided along the spiral direction on the front end surfaces of the fixed spiral wrap 12B and the swirl spiral wrap 13B of the fixed scroll member 12 and the orbiting scroll member 13, respectively. The chip seal members 14 and 15 are fitted and mounted respectively. The tip seal members 14 and 15 are made of, for example, PPS (polyphenylene sulfide), PEEK (polyether ether ketone), or the like, and are slidably contacted with the spiral wrap tooth bottom surface of the other scroll member to constitute the tip seal portion. is doing.

  The pair of fixed scroll member 12 and the orbiting scroll member 13 are assembled in a state where the centers of the fixed scroll member 12 and the orbiting scroll member 13 are separated from each other by the orbiting radius and the fixed spiral wrap 12B and the orbiting spiral wrap 13B are engaged with each other with a phase difference of 180 degrees. . Thus, between the fixed and orbiting scroll members 12 and 13, a pair of compression chambers 16 limited by the fixed end plate 12A and the orbiting end plate 13A, the fixed spiral wrap 12B and the orbiting spiral wrap 13B are located at the center of the scroll. Will be formed symmetrically with respect to. The fixed scroll member 12 is fixedly installed on the inner surface of the rear housing 4 with bolts 17, and the orbiting scroll member 13 is provided on one end side of the crankshaft 5 on the boss portion provided on the back surface of the orbiting end plate 13A. The eccentric pins 5C are connected and driven to rotate.

  The orbiting scroll member 13 has a thrust bearing surface 3B formed on the front housing 3 and a thrust surface 13D on the back surface of the orbiting end plate 13A supported on the thrust bearing surface 3B. The orbiting scroll member 13 is configured to be revolved and driven with respect to the fixed scroll member 12 while being prevented from rotating by a rotation prevention mechanism 18 such as a pin ring or an Oldham ring interposed between them.

  A discharge port 12D for discharging the compressed refrigerant gas is opened at the center of the fixed end plate 12A in the fixed scroll member 12, and the discharge port 12D is attached to the fixed end plate 12A via a retainer 19. The discharge reed valve 20 is provided. Further, a sealing member 21 such as an O-ring is provided on the outer peripheral surface of the fixed end plate 12A so as to be in close contact with the inner surface of the rear housing 4, and the discharge separated from the inner space of the housing 2 with the rear housing 4. A chamber 22 is formed. Thereby, the internal space of the housing 2 excluding the discharge chamber 22 is configured to function as the suction chamber 23. The refrigerant gas returning from the refrigeration cycle is sucked into the suction chamber 23 through the suction port 24 provided in the rear housing 4, and is formed between the fixed scroll member 12 and the orbiting scroll member 13 through the suction chamber 23. The refrigerant gas is sucked into the compression chamber 16. Note that a sealing material 25 such as an O-ring is interposed on the joint surface between the front housing 3 and the rear housing 4, and the suction chamber 23 formed in the housing 2 is hermetically sealed from the atmosphere.

  The fixed scroll member 12 and the orbiting scroll 13 of the scroll compressor 1 are made of an aluminum alloy as described above. On the other hand, here, the anodized film 30 (for preventing adhesion) is formed on the orbiting scroll member 13 side. Anodized coating film; anodized is a trade name). As shown in FIG. 2, the anodized film 30 is formed on the entire surface on the side meshing with the fixed scroll member 12. In addition, the whole surface here means the whole surface including the front end surface 13E, the tooth bottom surface 13F, and the side surface 13G of the swirl spiral wrap 13B on the side where the swirl spiral wrap 13B of the swivel end plate 13A is erected. .

  Further, as shown in FIGS. 2 to 3, the orbiting scroll member 13 has a portion where the tip end surface 13E of the lap tip surface 13E except the tip seal groove 13C and the tip end surface 12E of the mating spiral wrap 12B of the tooth bottom surface 13F slide. (The hatched area shown in FIGS. 2 and 3) and the sliding portion of the thrust surface 13D with respect to the thrust bearing surface 3B on the back surface of the swivel end plate 13A (the surface opposite to the surface on which the spiral wrap 13B is erected) ( The coating films 40A, 40B, and 40C having heat resistance and slidability are selectively provided in the hatched area shown in FIGS. In the above description, selectively providing a coating film on a specific part means that a coating film is literally provided only in an area selected, and no coating is applied to an area outside the area. Even if it is the tip seal groove 13C or the wrap side surface 13G of the surface or the end plate surface, the portion where the counterpart tip surface is out of the sliding area, or the portion outside the sliding area with respect to the thrust bearing surface is coated. A coating will not be provided.

The coating films 40A, 40B, and 40C preferably have a heat resistance of at least about 160 ° C. and good slidability, and PTFE and PFA having excellent heat resistance and slidability characteristics. Fluorine-based resins such as FEP are preferable, and among them, PTFE (polytetrafluoroethylene) having solid lubricity (self-lubricating property) is preferable. The coating films 40A, 40B, and 40C are coated on the anodized film 30 as a base. For this reason, the anodic oxidation coating 30 is also provided on the thrust surface 13D of the turning end plate 13A.
When the anodized film 30 is not provided as a base for the coating films 40A, 40B, and 40C, it can be replaced by a shot blast process.

With the above configuration, according to the present embodiment, the following operational effects are obtained.
When a rotational driving force is transmitted from an external drive source to the crankshaft 5 via a pulley, electromagnetic clutch, etc. (not shown) and the crankshaft 5 is rotated, the eccentric pin 5C of the crankshaft 5 is connected to the eccentric pin 5C via the drive bush 9 and the drive bearing 10. The orbiting scroll member 13 connected to the fixed scroll member 12 is driven to rotate orbit with respect to the fixed scroll member 12 while being prevented from rotating by the rotation preventing mechanism 18. As a result, the refrigerant gas in the suction chamber 23 is sucked into the compression chamber 16 formed radially outward. The compression chamber 16 is moved to the center side while being reduced in volume after being closed by suction at a predetermined turning angle position. During this time, the refrigerant gas is compressed, and when the compression chamber 16 reaches a position where it communicates with the discharge port 12D, the discharge reed valve 20 is pushed open and the compressed gas is discharged into the discharge chamber 22. Then, it is discharged out of the scroll compressor 1.

  During operation, depending on the state, the wrap tip surfaces 12E and 13E and the tooth bottom surfaces 12F and 13F of the spiral wraps 12B and 13B of the orbiting scroll 13 may come into contact with each other. However, in this embodiment, since the coating films 40A and 40B having heat resistance and sliding properties are provided on the tip surface 13E and the tooth bottom surface 13F of the spiral wrap 13B in the orbiting scroll member 13, the metals are directly connected to each other. There is no sliding on contact. In addition, since the coating films 40A and 40B have heat resistance and slidability, seizure does not occur even when the wrap tip surfaces 12E and 13E and the tooth bottom surfaces 12F and 13F contact and slide. Therefore, the seizure resistance between the spiral wraps 12B and 13B can be improved as much as possible.

  Further, as described above, when the tip surfaces 12E and 13E of the spiral wraps 12B and 13B come into contact with the tooth bottom surfaces 12F and 13F, the surface pressure increases and the thrust load acting on the orbiting scroll member 13 increases. The contact load between the thrust surface 13D on the back of the orbiting scroll member 13 and the thrust bearing surface 3B increases, and seizure is likely to occur. However, since the coating surface 40C having heat resistance and sliding property is also provided on the thrust surface 13D, seizure on the sliding surface between the thrust surface 13D and the thrust bearing surface 3B can be prevented, and the thrust sliding surface can be prevented. The seizure resistance in can be improved as much as possible.

  In addition, the coating films 40A, 40B, and 40C are selectively provided only on limited portions of the wrap tip surface 13E, the tooth bottom surface 13F, and the thrust surface 13D of the orbiting scroll member 13 that may cause seizure. The abrasion powder generated from the coating films 40A, 40B, and 40C can be minimized. Therefore, it is possible to suppress a failure or an accident that occurs due to the wear powder being caught in the sliding portion or the like. The coating films 40A, 40B, and 40C may be provided only on the orbiting scroll member 13, and can be efficiently produced.

Further, since the conformability between the tip surfaces 12E and 13E and the tooth bottom surfaces 12F and 13F of the spiral wraps 12B and 13B can be improved and the gap between the tip seal portions can be made as small as possible, Gas leakage can be reduced and compression efficiency can be improved.
Furthermore, since the coating films 40A, 40B, and 40C are coated on the anodized film 30 or the shot blast process as a base, the adhesion of the coating films 40A, 40B, and 40C is improved. Can do.

[Second Embodiment]
Next, a second embodiment according to the present invention will be described.
In the first embodiment, the example in which the coating films 40A and 40B are provided on the wrap tip surface 13E and the tooth bottom surface 13F of the orbiting scroll member 13 has been described. However, the coating films 40A and 40B are not limited to this and can be provided as follows.
First, the coating films 40A and 40B may be provided on the wrap tip surface 12E and the tooth bottom surface 12F of the fixed scroll member 12.
Further, the coating films 40 </ b> A and 40 </ b> B may be provided on the wrap front end surfaces 12 </ b> E and 13 </ b> E of the fixed scroll member 12 and the orbiting scroll member 13.
Further, the coating films 40A and 40B may be provided on the tooth bottom surfaces 12F and 13F of the fixed scroll member 12 and the orbiting scroll member 13.
In any of the above embodiments, the same effects as those of the first embodiment can be obtained.

  In the first and second embodiments, the example in which the coating film is not provided in the chip seal grooves 12C and 13C has been described. However, the coating film is provided on the bottom surface or the bottom surface and the side surface of the chip seal grooves 12C and 13C. Also good.

[Third Embodiment]
Next, a third embodiment according to the present invention will be described.
In the said 1st Embodiment, although coating film 40A, 40B, 40C is premised on coating using a normal spraying method, a dipping method, etc., this embodiment performs said coating film with the following printing methods. It is to be coated.
First, the coating films 40A, 40B, and 40C can be coated by screen printing. This screen printing is a printing method in which a hole is made in a flexible plate itself, and a printing medium is rubbed from the plate to be printed on the printing material, which can be easily printed on the surface of the printing material containing metal. It is.

  By coating the coating films 40A, 40B, and 40C using such a screen printing method, the coating films 40A and 40B that are printing media are applied only to the limited portions of the scroll members 12 and 13 that are printing objects. , 40C can be accurately and easily coated. Thereby, the scroll members 12 and 13 in which the coating films 40A, 40B, and 40C are coated only on specific portions can be manufactured relatively easily and at low cost.

Secondly, the coating films 40A, 40B, 40C can be coated by pad printing. This pad printing is a printing method in which a printing medium is transferred onto a flexible pad, and the pad is pressed against the printing material to print on the printing material. Not only the flat surface of the printing material containing metal, but also a curved surface, etc. In addition, printing can be easily performed.
By coating the coating films 40A, 40B, and 40C using such a pad printing method, the coating films 40A, 40B, and 40C, which are printing media, only at specific portions, as in the case of the above-described screen printing method. Can be accurately and easily coated.

[Fourth Embodiment]
Next, a fourth embodiment according to the present invention will be described.
In the present embodiment, the coating films 40A, 40B, and 40C are coated by the following roll coater.
The roll coater coats the coating medium on the required part of the coating material by applying the coating medium on the rotating roll and passing the coating material between the rolls. Is possible.
By using such a roll coater, a coating film as a medium to be coated can be accurately and easily coated only on a limited portion of the scroll member which is a coating material.

Coating with a roll coater has features such as high film thickness accuracy, coating on specific parts such as the wrap tip surface, high processing speed, high coating efficiency, high yield, and low cost. Have.
Therefore, a scroll member in which only a specific portion is coated with a coating film can be easily manufactured at low cost.

[Fifth Embodiment]
Next, a fifth embodiment according to the present invention will be described.
In this embodiment, an Sn-impregnated anodized film in which Sn (tin) is impregnated is provided on the anodized film 30 in place of the coating films 40A, 40B, and 40C of the fluororesin in the first embodiment. It is a thing.
As described above, even when the coating film is composed of the Sn-impregnated anodized film, the seizure resistance and the wear resistance can be sufficiently improved due to the heat resistance and sliding property of the Sn-impregnated anodized film. Can do.
Therefore, according to the present embodiment, the chip gap can be made as small as possible to improve the compression efficiency, and seizure due to contact between the tip surface of the spiral wrap and the tooth bottom surface in each scroll member can be suppressed. Can do. In addition, since the Sn-impregnated anodized film is selectively provided only on a specific part, the generation of wear powder is minimized, and failures and accidents that occur due to the wear powder being bitten into the sliding portion or the like Can be suppressed.

  In the above-described embodiment, the coating film to be coated on a specific part of the scroll member may be used after being subjected to the coating process by being incorporated in the compressor as it is. It is also possible to use it. This is because the coating film thickness accuracy is low and non-uniform when the coating treatment is performed, or the coating film may be attached to the part where the coating is not desired. It can be incorporated as dimensions and conditions. Thereby, even if the coating method is not necessarily appropriate, it becomes possible to manufacture an accurate product.

In the above-described embodiment, the example in which the chip seal grooves 12C and 13C are provided in the fixed scroll member 12 and the orbiting scroll member 13 and the chip seal members 14 and 15 are fitted and mounted has been described. However, the present invention is limited to this. Needless to say, the present invention can also be applied to a scroll compressor having no chip seal members 14 and 15.
In the above-described embodiment, the example in which the fixed scroll member 12 and the orbiting scroll member 13 are made of an aluminum alloy has been described. However, the present invention is not limited to this, and the fixed scroll member 12 and the orbiting scroll member 13 are not limited thereto. Of course, this can be applied to a scroll compressor made of cast iron.

It is a longitudinal section of the scroll compressor concerning a 1st embodiment of the present invention. It is a partial expanded longitudinal cross-sectional view of the scroll compressor shown in FIG. It is a side view by the side of the spiral wrap in the turning scroll member of the scroll compressor shown in FIG. It is a side view by the side of the thrust surface in the turning scroll member of the scroll compressor shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Scroll compressor 3B Thrust bearing surface 12 Fixed scroll member 12A Fixed end plate 12B Fixed spiral wrap 12C Tip seal groove 12E Wrap tip surface 12F Lap tooth bottom surface 13 Orbiting scroll member 13A Orbit end plate 13B Orbit spiral spiral wrap 13C Tip seal groove 13D Thrust surface 13E Wrap tip surface 13F Wrap tooth bottom surface 14, 15 Tip seal member 30 Anodizing coating 40A, 40B, 40C Coating coating

Claims (12)

A fixed scroll member in which a fixed spiral wrap is erected integrally on one surface of the fixed end plate; and
An orbiting scroll member that is integrally provided on one surface of the orbiting end plate so that the orbiting spiral wrap is erected and combined with the fixed scroll member so as to be revolved and rotated while being prevented from rotating. In the scroll compressor
A scroll compressor, wherein a coating film is selectively provided on a front end surface of the spiral wrap and / or a tooth bottom surface of the spiral wrap in the fixed scroll member and / or the orbiting scroll member. A fixed scroll member in which a fixed spiral wrap is erected integrally on one surface of the fixed end plate; and
An orbiting scroll member that is integrally provided on one surface of the orbiting end plate so that the orbiting spiral wrap is erected and combined with the fixed scroll member so as to be revolved and rotated while being prevented from rotating. In the scroll compressor
A scroll compressor, wherein a coating film having heat resistance and slidability is selectively provided at a sliding portion of the other surface of the orbiting scroll plate with respect to a thrust bearing surface of the orbiting scroll member. A fixed scroll member in which a fixed spiral wrap is erected integrally on one surface of the fixed end plate; and
An orbiting scroll member that is integrally provided on one surface of the orbiting end plate so that the orbiting spiral wrap is erected and combined with the fixed scroll member so as to be revolved and rotated while being prevented from rotating. In the scroll compressor
A coating film having heat resistance and slidability selectively at a sliding portion of the orbiting scroll member with respect to the thrust bearing surface of the tip surface of the spiral wrap, the tooth bottom surface of the spiral wrap and the other surface of the orbiting end plate. A scroll compressor characterized in that is provided.   The fixed scroll member and the orbiting scroll member include a tip seal member fitted and attached to a tip seal groove provided on a tip surface of the spiral wrap, and the spiral scroll of the fixed scroll member and / or the orbiting scroll member is provided. 4. The scroll compressor according to claim 1, wherein the coating film is provided at least on a portion excluding the tip seal groove on the front surface of the wrap-like wrap.   The scroll compressor according to any one of claims 1 to 4, wherein the coating film is made of a fluorine resin film.   The scroll compressor according to claim 5, wherein the fluorine-based resin coating is composed of a polytetrafluoroethylene coating.   The scroll compressor according to any one of claims 1 to 6, wherein the coating film is coated on an anodized film.   The scroll compressor according to any one of claims 1 to 6, wherein the coating film is coated on a shot blast treatment.   9. The scroll compressor according to claim 1, wherein the coating film is coated by screen printing.   The scroll compressor according to claim 1, wherein the coating film is coated by pad printing.   The scroll compressor according to any one of claims 1 to 8, wherein the coating film is coated by a roll coater. The scroll compressor according to any one of claims 1 to 3, wherein the coating film is composed of a Sn-impregnated anodized film.

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