JPH03217679A - Transverse type scroll compressor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a horizontal scroll compressor used in equipment such as refrigerators and air conditioners.

[Conventional technology]

3 and 4 are cross-sectional views showing a conventional horizontal scroll compressor disclosed in Japanese Patent Application No. 63-175508. In the configured shell, this shell 5
1 is provided with an oil reservoir 52 at the bottom for storing oil for lubricating the sliding parts of each bearing, and a compression mechanism assembly 53 for compressing the working fluid is installed inside. The compression mechanism assembly 53 includes a fixed scroll 54 and an oscillating scroll 55, each of which is eccentrically assembled to the other, and a motor stator 56 and a motor rotor 57 that drive the oscillating scroll 55 of these two scrolls. has been done. A fixed scroll 54 of this compression mechanism assembly 53 has a discharge port 54a, a gas intake port 54b, and a spiral wrap 54c, and is fixed to a bearing support 58.

The gas inlet 54b of the fixed scroll 54 communicates with the compression chamber 13, and both side openings of the gas inlet 54b open above the central axis of the shell 5l. The bearing support 58 is provided in the axial direction of the fixed scroll 54, is fixed to the inner circumferential surface of the shell 51 by shrink fitting, and has a generally circular shape as a whole. The outer peripheral edge of the bearing support 58 is provided with an oil discharge port 58a that opens downward from the central axis of the shell 5l, and a recess 58b that constitutes the oil discharge port 58a.
In addition, as shown in FIG. 4, there is a notch 5 that opens in the upper and lower radial directions.
8c, 58d and a mounting portion 58e for fixing the motor stator 56 with bolts or the like. 59 is a main shaft connecting the swinging scroll 55, supported by the bearing support 58, and mounted inside the shell 5l. It is configured to be rotated by a motor A consisting of the motor stator 56 and the motor rotor 57, and has an oil supply passage 59a extending in the axial direction. Reference numeral 60 denotes a housing having a tubular body 6l facing the oil reservoir 52, which is provided in the axial direction of the oscillating scroll 55, and is fixed to the motor stator 56 of the motor A with bolts or the like.
A displacement bomb 62 that is driven by the rotation of the main shaft 59 is disposed inside. 66 is a suction pipe that sucks working fluid into the shell 51. In the conventional horizontal scroll compressor as described above, when motor A is driven,
The gas, which is the working fluid, was sucked into the shell 5l as shown by the solid line arrow in FIG. Thereafter, it passes through the notch 58c above the bearing support 58 and is taken into the compression chamber l3 from the gas inlet 54b.

On the other hand, oil flows as shown by the dashed arrow in FIG.

That is, the pump 62 is driven by the rotation of the main shaft 59, and the oil is fed under pressure to the oil supply passage 59a through the pipe body 61 and the bomb 62, and after lubricating each sliding part, is returned to the oil reservoir 52 through the oil discharge port 58a. It will be done.

[Problem to be solved by the invention]

Since the conventional horizontal scroll compressor is configured as described above, the flow rate of the gas sucked into the shell 5l through the suction pipe 66 is such that at the same time as it flows into the shell 51 from the suction pipe 66, the passage area is large. As a result, the flow velocity decreases. However, after cooling the motor A, the passage area decreases when passing through the notch 58c above the bearing support 58, so the flow speed increases again, and the maximum flow speed occurs when passing through the gas inlet 54b of the fixed scroll 54. becomes.

As a result, the pressure distribution inside the shell 5I becomes uneven due to passage resistance of gas flow, etc., and the gas inlet 54b
The pressure near is lowest. Therefore, the oil level in the oil reservoir 52 inside the shell 5l becomes uneven, and the scum intake port 54b
The oil level near the oil discharge port 58b closest to is the highest, and the oil level near the pipe body 6l is the lowest. In addition, oil drain port 5
Since the length between the pipe 8b and the pipe 6l is large, the difference between the highest oil level and the lowest oil level is large.

As a result, under conditions where the oil discharged from the compressor along with the gas does not return easily, such as when configuring a refrigeration cycle with long pipe lengths or when operating under high compression ratio conditions,
Due to the drop in the oil level and uneven oil level distribution, the pipe 6l comes out above the oil level, which makes it impossible for the bomb 62 to pump oil to each sliding part, causing accidents such as seizure of the sliding parts. 6 This invention was made to solve the above-mentioned problem, and it has been developed to solve the problem of reducing the reliability of the compressor when using it. It is an object of the present invention to provide a horizontal scroll compressor that can prevent seizure of moving parts and improve reliability in use of the compressor.

[Means to solve the problem]

A horizontal scroll compressor according to the present invention includes a cylindrical shell having an oil reservoir at the bottom and a central axis extending in the horizontal direction, and a gas cylinder provided inside the shell and opening upward from the central axis. a fixed scroll having an inlet; a bearing support provided in the axial direction of the fixed scroll and having an oil discharge port opening below the central axis; A gas passage guide is provided that communicates with the vicinity of the center.

[Effect]

In the horizontal scroll compressor of this invention, the gas inlet of the fixed scroll is extended and opened near the center of the shell. The difference in minimum oil level can be reduced.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the drawings, the same members as in FIGS. 3 and 4 are designated by the same reference numerals, and detailed explanations will be omitted.

1 and 2-, 67 is a guide forming a gas passage 68, one end of which is connected to the gas inlet 54b of the fixed scroll 54 through a partition 67a, and the other end connected to the upper part of the bearing support 58. An opening 67b is formed near the coil end on the shell center side of the motor stator 56 through the provided notch 58c. That is, the gas passage guide 67 is a plate-like member formed into a U-shape and fixed to the inner circumferential wall of the shell 51 by welding or the like, and a gas passage 68 is formed between it and the inner circumferential wall of the shell 5l. , it is a passageway isolated from the surrounding area.

In the horizontal scroll compressor configured in this way, the gas serving as the working fluid is sucked into the gas suction port 54b of the fixed scroll 54 through the gas passage 68, so that the pressure distribution within the shell 51 is gas-permeable! 868 opening 67b
The oil level distribution in the oil sump 52 is highest near the center of the shell, and both ends of the shell are at approximately the same height, so that the difference between the highest oil level and the lowest oil level is Minimum. Note that when the opening of the gas passage 68 is moved closer to the bomb 62 than the center of the shell, for example when extended to near the center of the motor A, the difference between the highest oil level and the oil level at the pipe body 61 becomes even smaller. However, by doing so, the gas sucked from the suction pipe 66 is sucked into the gas passage 68 before cooling the motor A.
It is not possible to extend the gas passage 68 from the vicinity of the center to the side of the bong 762, since this will cause problems such as motor overheating.

Therefore, in the present invention, the difference in height of the oil level in the oil sump 52 can be minimized, and even when the oil level in the oil sump 52 is low, the pipe body 6I does not come out of the oil level, so that the oil level can always be reliably maintained. Oil can then be pumped to each sliding part using the pump 62.

Further, in this embodiment, a case is shown in which the gas passage guide 67 is made of a plate-like member, but a steel pipe, a steel pipe, etc. may also be used. In other words, any method can be used as long as the waste suction port 54b and the central part of the shell can be communicated with each other and a passage isolated from the surroundings can be formed.

〔Effect of the invention〕

As explained above, according to the present invention, a gas passage is provided that communicates the gas inlet of the fixed scroll with the center of the shell, thereby reducing the oil level in the oil reservoir caused by uneven pressure distribution within the shell. The height difference can be minimized, and the pump can reliably send oil to each sliding part, so there is no risk of seizure of each sliding part, and highly reliable horizontal scroll compression. There is an effect that can be obtained by machine.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a horizontal scroll compressor according to the present invention, Fig. 2 is a cross-sectional view thereof, Fig. 3 is a sectional view showing a conventional horizontal scroll compressor, and Fig. 4 is a cross-sectional view thereof. It is a diagram. In the figure, 51 is a shell, 52 is an oil reservoir, 54 is a fixed scroll, 54b is a gas inlet, 55 is an oscillating scroll, 5
8 is a bearing support, 58b is an oil discharge port, 59 is a main shaft, 59a
62 is a fuel supply passage, 62 is a bomb, 67 is a guide, and 68 is a gas passage.

Claims (1)

[Claims] A cylindrical shell having an oil reservoir at the bottom and a center axis extending horizontally; a fixed scroll having a gas inlet provided within the shell and opening above the center axis; a bearing support having an oil discharge port provided in the axial direction and opening downward from the central axis; a main shaft supported by the bearing support and having an oil supply passage extending in the axial direction; and a main shaft connected to the main shaft and said fixed part. an oscillating scroll eccentrically combined with the scroll; a positive displacement pump disposed at the end of the main shaft opposite to the fixed scroll for forcibly lubricating each bearing; A horizontal scroll compressor, characterized in that a guide is disposed at the fixed scroll to form a gas passage communicating with the gas suction hole of the fixed scroll and the vicinity of the center of the shell.