JPH0141837B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hermetic scroll compressor, and more particularly to a manufacturing method, an easy-to-assemble structure, and a compressor structure with little oil spillage.

As shown in FIG. 1, a conventional hermetic scroll compressor includes a pair of scroll-type compression mechanisms 1 and 2 that rotate relative to each other, a frame 3 on which the compression mechanisms are mounted, a motor 4,...a closed container 5, It consists of a suction pipe 8 and a discharge pipe 9. Low-pressure gas sucked in from the suction pipe 8 is compressed by a pair of scroll-type compression mechanisms 1 and 2, and is discharged into the closed container 5 as high-pressure gas. Then, the discharged gas is eventually sent under pressure from the discharge pipe 9 to other equipment (condenser) constituting the refrigeration cycle. Since the frame equipped with the compression mechanism and the motor are fixed to the seats 6 and 7 provided in the sealed container 5, the parallelism of the seats 6 and 7 is required to ensure the air gap of the motor 4. , finishing work is required to expose the rear surface of the seat welded to the sealed container. Furthermore, in order to prevent these seats from being deformed during operation of the compressor, the hermetic container needs to be made thicker to increase its rigidity, which increases its weight. Further, a suction pipe 8 is connected to the fixed scroll 1 of the scroll compression mechanism. Since the suction pipe 8 is fixed to both the fixed scroll 1 and the closed container 5, if the closed container is deformed, excessive stress will be generated and breakage will occur. Further, since the discharge pipe 9 is connected to the inner wall of the closed container below the frame 3, oil mixed in the compressed gas is likely to travel along the inner wall of the container and be discharged together with the discharge gas, causing oil to rise. Related to these, for example, JP-A-56-
156490 etc. The purpose is to prevent an increase in suction pipe stress due to deformation of the closed container.

An object of the present invention is to connect and fix an airtight container whose internal pressure becomes a discharge pressure, a compressor in which a fixed scroll and an orbiting scroll are engaged with a motor, and a motor connected to each other via a drive shaft. A suction passage communicating with the suction side of the compressor and a discharge passage communicating with the discharge side are connected by piping to other equipment constituting the refrigeration cycle, and the fixed scroll and the motor are mounted and fixed on one frame. , a hermetic scroll compressor in which the frame is press-fitted and fixed into the hermetic container, and a suction pipe communicating with the suction passage is connected to a press-fitting part of the frame, the connection end of the suction pipe being connected to the hermetic container. This is achieved by not protruding inward, being connected and fixed only to the sealed container, and by sealing between the high pressure part inside the sealed container and the low pressure side suction pipe connection part only by the frame press-fit part. .

An embodiment of the invention is shown in FIG. Note that the same reference numerals as in the prior art indicate the same parts as in the prior art, and they function in the same way.
At one end of the frame 3 are scroll compression mechanisms 1 and 2.
is attached, and there is a motor seat 10 at the other end, on which the motor 4 is attached. Further, the press-fitting part of the frame has a suction port 11 communicating with the suction pipe 8 and a suction passage 12 communicating with the suction port, and the fixed scroll 1 has a suction passage 1 communicating with the suction passage 12.
3 and an inlet 14. The end surface of the suction pipe 8 does not protrude into the inside of the closed container 5 and
Only fixed by welding. Further, like the suction pipe 8, the discharge pipe 9 is also fixed so as not to protrude inward. Therefore, the frame 3 can be assembled by press-fitting after the suction pipe 8 and discharge pipe 9 are welded and attached, and the assembly process of the compressor can be simplified. Further, the press-fitted portion of the frame has a discharge passage 15 communicating with the discharge pipe 9. Since both the compression mechanism and the motor are mounted on the frame, they are not affected by deformation of the closed container. Further, the frame is simply press-fitted into the closed container, and the inner surface of the closed container only needs to be finished precisely at the press-fitting portion. Moreover, since the suction pipe is also located in the press-fitted part of the frame, it is not affected by the deformation of the closed container. In addition, the seal between the high-pressure part in the sealed container and the suction pipe connection part on the low-pressure side is reliably sealed by the contact between the inner wall surface of the sealed container and the outer wall surface of the frame at the press-fitting part of the frame. No welding required. Furthermore, since the discharge pipe communicates with the discharge port of the frame press-fitting part, the flow direction of the gas in the closed container changes at right angles and is discharged, so there is little oil rise.

Furthermore, by providing the passage entrance at a position distant from the inner wall of the container, the passage becomes a room independent from the inner wall of the container, and oil traveling along the inner wall is no longer discharged, resulting in a further effect of preventing oil from rising.

As described above, since the deformation of the sealed container does not adversely affect the operation of the compressor, the sealed container can be made thinner and lighter. For more information on the discharge passage, see Figure 3.
As shown in FIG. 4, by opening the discharge passage inlet 16 at a position away from the inner wall of the container, it is more effective to prevent oil from rising.

According to the present invention, there is an effect of preventing an increase in suction pipe stress due to deformation of the closed container.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the structure of a conventional hermetic scroll compressor, FIG. 2 is a cross-sectional view showing the structure of a hermetic scroll compressor according to an embodiment of the present invention, and FIG.
4 are sectional views of other embodiments. 1...Fixed scroll, 2...Orbiting scroll, 3
...Frame, 4...Motor, 5...Airtight container, 6...Setting seat, 7...Setting seat, 8...Suction pipe, 9...Discharge pipe, 1
0...Motor seat, 11...Suction port, 12...Suction passage,
13...Suction passage, 14...Suction port, 15...Discharge passage, 16...Discharge passage entrance.

Claims (1)

[Claims] 1. A closed container whose internal pressure becomes a discharge pressure, and a compressor and a motor in which a fixed scroll and an orbiting scroll are engaged are connected and fixed via a drive shaft, A suction passage communicating with the suction side of the compressor and a discharge passage communicating with the discharge side are connected by piping to other equipment constituting the refrigeration cycle, and the fixed scroll and the motor are mounted and fixed on one frame. and a hermetic scroll compressor in which the frame is press-fitted and fixed in the hermetic container, and a suction pipe communicating with the suction passage is connected to the press-fitted part of the frame, wherein the connecting end of the suction pipe is connected to the airtight container. It is characterized in that it does not protrude into the container, is connected and fixed only to the sealed container, and seals between the high-pressure part in the sealed container and the low-pressure side suction pipe connection part only by the frame press-fit part. Hermetic scroll compressor.