JP2012102611A - Method of manufacturing hermetic compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the mixture of a fine foreign matter from an oil supply mechanism of a hermetic compressor by a simple constitution so as to improve the reliability of the compressor.SOLUTION: In such a constitution that a mesh filter 207 is put inside an inlet (caulked type) 208 to prevent the mixture of the foreign matter into a compressor mechanism 102, the mesh filter 207 is nipped in the caulking part provided at the inlet 208 and thereafter it is fixed by laser welding to a lid plate. Thus, a step of brazing the mesh filter 207 can be eliminated. In addition, the attachment of the mesh filter 207 takes place by a nipping method, whereby a stainless steel mesh filter 207 can be also attached, and thus an extremely fine mesh can be constituted.

Description

  The present invention relates to a manufacturing method of a hermetic compressor used in commercial and household air conditioners, in-vehicle air conditioners, water heaters, and the like, and more particularly to a method of manufacturing the oil supply mechanism. .

  As a conventional example, a hermetic electric scroll compressor will be described as an example with reference to the drawings.

  Conventionally, when an oil supply mechanism is provided inside a hermetic compressor, an object is to reliably supply lubricating oil to the inside of the mechanism at any operating frequency such as inverter drive (for example, see Patent Document 1).

  FIG. 2 is a cross-sectional view in the case of a hermetic electric scroll compressor showing the configuration of the conventional oil supply mechanism described in Patent Document 1, and FIG. 3 is an assembly part configuration diagram of the oil supply mechanism in this case. .

  As shown in FIG. 2, a compression mechanism portion 102, an electric motor portion 103, a crankshaft 106, and a plate 116 are installed inside the sealed container 101. The electric motor unit 103 includes a stator 104 and a rotor 105, and the rotational force generated by the electric motor unit 103 is transmitted to the compression mechanism unit 102 by the crankshaft 106.

  The compression mechanism unit 102 includes a main bearing 109 provided with a bearing member 108, a fixed scroll 110, a turning scroll 113, and an Oldham ring 115.

  When the rotational force of the electric motor is transmitted to the compression mechanism unit 102, a compression action is generated by these components. As a result, the low-pressure refrigerant is sucked from the suction pipe 111 provided in the sealed container 101, and the compression mechanism unit 102. After being compressed by the above, it is discharged from the discharge pipe 112 as a high-pressure refrigerant. The compression principle of the scroll compressor is already known and will not be described here.

  The crankshaft 106 is rotatably supported by a main bearing 109 installed in the compression mechanism unit 102 and a sub-bearing 114 provided on a plate 116 fixed to the sealed container 101.

  Here, an oil supply mechanism 117 in which a pump case 201, a gear pump 202, a cover plate portion 203, and a suction port portion 205 are assembled and fixed by bolts 206 is installed on the plate 116, and the crankshaft 106 rotates to be sealed. The lubricating oil 107 stored in the container 101 is pumped up, and each part of the compression mechanism 102 is lubricated through an oil supply hole provided in the crankshaft 106.

JP 2005-113792 A

However, in the case of the oil supply mechanism as in the above-described conventional configuration, a mesh filter is brazed inside the suction port portion to prevent foreign matter from entering the compression mechanism portion, and then laser welding is fixed to the lid plate portion, which complicates the process. is there.

  Also, the iron mesh filter that can be brazed does not have a fine mesh, and stainless steel with a fine mesh cannot be brazed. For this reason, fine foreign matter enters the compression mechanism together with the lubricating oil, causing a decrease in reliability.

  The present invention has been made to solve these problems, and an object of the present invention is to provide a method for manufacturing a hermetic compressor that reduces the welding process of an oil supply mechanism, prevents foreign matter contamination, and is low in cost and excellent in reliability.

  In order to solve the above-described conventional problems, the mesh filter brazing step can be omitted by sandwiching the mesh filter with a caulking portion provided at the suction port portion and then fixing the mesh filter by laser welding.

  Further, by adopting a sandwiching method for attaching the mesh filter, it is possible to attach a stainless steel mesh filter, and an ultra fine mesh can be constructed.

  According to the configuration of the oil supply mechanism of the present invention, it is possible to provide a method for manufacturing a hermetic compressor that is low in cost and excellent in reliability by reducing the assembly process of the oil supply mechanism and preventing entry of fine foreign matters.

Assembly part block diagram of oil supply mechanism in embodiment of this invention Sectional view of a conventional hermetic electric scroll compressor Oil supply mechanism assembly configuration diagram for a conventional hermetic electric scroll compressor

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is an example of an assembly part configuration of an oil supply mechanism 117 according to an embodiment of the present invention. The suction port 208 is fixed to the lid plate 203 by laser welding.

  At this time, in the configuration in which the mesh filter 207 is attached to the inside of the suction port portion 208 to prevent foreign matter from entering the compression mechanism portion 102, the mesh filter 207 is sandwiched between the crimping portions provided in the suction port portion. By doing so, the brazing step can be omitted.

  According to this configuration, it is possible to reduce the number of assembling steps and to mount the stainless steel mesh filter 207, thereby preventing the entry of fine foreign matter with a fine mesh and improving the reliability.

  As described above, the hermetic compressor according to the present invention can provide a hermetic compressor that can reduce the assembly process of the oil supply mechanism, prevent fine foreign matters from being mixed, and is low in cost and excellent in reliability.

DESCRIPTION OF SYMBOLS 101 Airtight container 102 Compression mechanism part 103 Electric motor part 104 Stator 105 Rotor 106 Crankshaft 107 Lubricating oil 108 Bearing member 109 Main bearing 110 Fixed scroll 111 Suction pipe 112 Discharge pipe 113 Orbiting scroll 114 Sub bearing 115 Oldham ring 116 Plate 117 Oil supply Mechanism 201 Pump case 202 Gear pump 203 Cover plate part 205 Suction port part 206 Bolt 207 Mesh filter 208 Suction port part

Claims (2)

A compression mechanism part that performs a compression operation via a crankshaft in an airtight container, an electric motor that drives the compression mechanism part, and an oil supply mechanism that supplies lubricating oil to the compression mechanism part from an oil supply hole provided in the crankshaft are arranged. In such a hermetic compressor, the oil supply mechanism is formed by fitting and fixing a suction port portion, a cover plate portion, a positive displacement suction mechanism portion, and a pump case for storing the same with bolts or the like. In the configuration in which a mesh filter is attached to the inside of the suction port portion to prevent foreign matter from entering the compression mechanism portion, the lid plate portion after the mesh filter is sandwiched between the crimping portions provided in the suction port portion A method of manufacturing a hermetic compressor that is laser-welded to the inside. The method for manufacturing a hermetic compressor according to claim 1, wherein the mesh filter is made of stainless steel.