JPH05180180A - Horizontal scroll compressor - Google Patents

Abstract

(57) [Summary] [Purpose] A horizontal scroll with high reliability is obtained by suppressing the oil rise while maintaining the amount of working fluid necessary for cooling the motor. In a horizontal scroll compressor in which a compression mechanism 7, a main shaft 3, a motor 4, a diversion chamber 17 and the like are provided in a shell 1, a coil end portion 21 of a stator 6 of a motor 4 is provided.
Of the coil end portion 21 of the stator 6 from the outflow hole 22 of the flow dividing chamber 17 between the outer periphery of the rotor and the oil sump 2 in the shell 1.
In addition, a shielding plate 24 for shielding the working fluid guided to the oil sump 2 from colliding with the oil sump 2 is provided. [Effect] The rise of oil can be prevented, the rise of oil can be suppressed, the seizure of the sliding portion due to oil depletion can be prevented, and the amount of working fluid required for cooling the motor can be maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal scroll compressor used for a refrigerating machine or an air conditioner for compressing a gas body (refrigerant) such as CFC.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view showing a horizontal scroll compressor disclosed in Japanese Patent Application Laid-Open No. 2-157493. In the figure, 1 is a cylindrical shell having an oil sump 2 at its bottom and a central axis extending horizontally, and 3 is a main shaft rotated by a rotor 5 and a stator 6 of a motor 4 provided in the shell 1. Reference numerals 7 and 7 denote a compression mechanism including a compression chamber 10 which is connected to the main shaft 3 and configured by a fixed scroll 8 and an orbiting scroll 9 for compressing fluid.
Is a positive displacement oil pump consisting of a trochoid type pump, and is connected to the main shaft 3 by a joint 12. Further, 13 is a second bearing frame disclosed in Japanese Patent Laid-Open No. 2-157488, 14 is a concave portion provided on the outer peripheral portion of the second bearing frame 13, and 15 is a concave portion 1.
4 is an outer edge portion formed so as to surround the periphery of the shell 4. The outer edge portion 15 is pressed into the inner wall of the shell 1 or closely adhered thereto by shrink fitting, and the inner wall of the shell 1 and the concave portion 14 form the flow dividing chamber 1
7 is formed, and the diversion chamber 17 communicates with the suction pipe 18. Further, a part of the outer edge portion 15 is cut out on both sides of the recess 14 in the horizontal direction, and outflow holes 19 and 20 are formed between the outer edge portion 15 and the inner wall of the shell 1. The outflow hole 19 allows the working fluid to flow out to the compression mechanism portion 7, and the outflow hole 20 allows the working fluid to flow out to the motor 4.

Further, in the vertical direction, an outflow hole 22 extending between the coil end 21 of the stator 6 of the motor 4 and the base plate portion 16 of the second bearing frame 13 is formed. The suction pipe 18 is attached to the shell 1 so as to be located near the center of the diversion chamber 17. Reference numeral 23 is a first bearing frame that supports the orbiting scroll 9 in the axial direction via bearings.

Next, the operation will be described. When the rotor 5 of the motor 4 starts rotating, the working fluid is sucked into the flow dividing chamber 17 through the suction pipe 18. A part of the sucked working fluid flows out through the outflow hole 19, and the compression chamber 1 of the compression mechanism portion 7
Lead to zero. Further, a part thereof flows out from the outflow hole 20, flows horizontally between the outer peripheral surface of the stator 6 of the motor 4 and the inner wall of the shell 1 in the direction of the positive displacement pump 11, and the lower coil end of the stator 6 and the entire stator 6. Is cooled and then introduced into the compression chamber 10 of the compression mechanism 7. Further, a part of the gas flows out from the outflow hole 22, cools the upper coil end 21 of the stator 6, merges with the gas outflowing from the outflow hole 19, and is guided to the compression chamber 10 of the compression mechanism section 7.

[0005]

Since the conventional horizontal scroll compressor is constructed as described above, the working fluid flows out from the outflow hole 22 through the flow dividing chamber 17 in the vertical direction, so that the upper portion of the stator 6 is prevented. Since it directly passes through the coil end 21 and the base plate portion 16 of the second bearing frame 13 and collides with the oil sump 2, the oil in the oil sump 2 rises, and together with the working fluid guided to the compression mechanism section 7, the compression chamber Guided to 10. Due to the increase of oil, the oil is taken out of the shell 1 and the sliding portion is burned due to the oil depletion, which lowers the reliability of the device.

It is an object of the present invention to provide a highly reliable horizontal scroll compressor which suppresses oil rise while maintaining a working fluid in an amount necessary for cooling a motor.

[0007]

A horizontal scroll compressor according to the present invention is provided with a compression mechanism in which a fixed scroll and an orbiting scroll are combined with each other, the orbiting scroll is driven by a main shaft, and the main shaft is a rotor of a motor section and Driven by the stator, the orbiting scroll is axially supported by the first bearing frame via the bearing, the main shaft is radially supported by the second bearing frame via the bearing, and the oil sump is stored at the bottom. And a compression mechanism section, a rotor and a stator, which are partitioned and fixed, are fixed on the outer peripheral surface of the second bearing frame, and a closed shell having a suction pipe for sucking the working fluid is provided so as to communicate with the suction pipe. A diversion chamber having an outflow hole for guiding the working fluid sucked from the suction pipe to the compression mechanism portion, the rotor and the stator, the coil end portion of the stator, and the oil sump is provided in the shell. A shield plate was provided between the outer periphery of the coil end portion of the theta and the oil sump to shield the working fluid led to the coil end portion and the oil sump of the stator from the outflow hole of the diversion chamber and the collision with the oil sump. It is characterized by that.

[0008]

According to the horizontal scroll compressor of the present invention, the collision between the working fluid guided to the coil end of the stator and the oil sump through the outflow hole of a part of the diversion chamber and the oil sump is shielded by the shield plate. The rise of oil is suppressed and the rise of oil is suppressed, and the amount of working fluid required for cooling the motor can be maintained.

[0009]

【Example】

Example 1. A first embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The same parts as those in FIG. 4 are designated by the same reference numerals and the description thereof will be omitted.

In the figure, reference numeral 24 is a shielding plate provided between the oil sump 2 and the outer peripheral portion of the upper coil end 21 of the stator 6 and above the oil sump 2, and is a semi-cylindrical cylinder having an opening in the radial direction. It is formed into a shape. The shield plate 24 is shown in FIG.
As shown in, the screw is fixed to the oil passage portion 25 of the second bearing frame 13 on the side opposite to the flow dividing chamber 17 by the screw 26.

According to the horizontal scroll compressor constructed as described above, the working fluid flowing out of the outflow hole 22 through the suction pipe 18 and the flow dividing chamber 17 has an upper coil end 21 of the stator 6 and the second bearing frame 13. After the upper coil end 21 is cooled by passing between the base plate portions 16 of the above, it collides with the shield plate 24 provided between the upper coil end 21 and the oil sump 2, and is guided in the horizontal direction. That is, the working fluid is blocked from directly impinging on the oil sump 2,
Prevents oil from rising. As a result, oil depletion can be prevented, the reliability of the device can be maintained, and a sufficient amount of working fluid required for cooling the motor 4 can be maintained.

Example 2. A second embodiment of the present invention is shown in FIG.
Shown in. In this embodiment, the oil passage portion 25 of the second bearing frame 13 on the vertically opposite side of the flow dividing chamber 17 is extended in a semi-cylindrical shape to form a shielding plate 27, which is the oil sump 2 The upper side is formed along the outer diameter of the base plate portion 16. Also in the horizontal scroll compressor configured as described above, the same effect as that of the first embodiment can be obtained. Furthermore, since the shielding plate 27 is formed integrally with the oil passage portion 25, the number of parts can be reduced.

[0013]

According to the horizontal scroll compressor of the present invention, since the working fluid flowing out from the outflow hole of a part of the diversion chamber and the shielding plate for blocking the collision with the oil sump are provided, the working fluid is directly supplied. It is possible to prevent collision with the oil sump, suppress oil rising, prevent seizure of the sliding part due to oil depletion, and maintain the amount of working fluid required for cooling the motor. Be done.

[Brief description of drawings]

FIG. 1 is a sectional view of a horizontal scroll compressor showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a main part of the horizontal scroll compressor shown in FIG.

FIG. 3 is a perspective view showing a configuration of a main part of a horizontal scroll compressor according to a second embodiment of the present invention.

FIG. 4 is a sectional view showing a conventional horizontal scroll compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 shell 2 oil sump 3 main shaft 4 motor 5 rotor 6 stator 7 compression mechanism 10 compression chamber 13 second bearing frame 16 base plate part 17 diversion chamber 18 suction pipe 21 upper coil end 22 outflow hole 24 shielding plate

Claims (1)

[Claims] 1. A compression mechanism in which a fixed scroll and an orbiting scroll are combined with each other, a main shaft for driving the orbiting scroll, a rotor and a stator of a motor unit for driving the main shaft, and the orbiting scroll via a bearing. Bearing frame for axially supporting the main shaft through a bearing in the radial direction, a second bearing frame for supporting the main shaft in the radial direction via a bearing, and an oil sump at the bottom for partitioning the compression mechanism section from the rotor and stator. A hermetic shell having a suction pipe arranged and fixed to the outer peripheral surface of the second bearing frame and sucking a working fluid; and a suction pipe provided in the shell so as to communicate with the suction pipe. And a diversion chamber having outflow holes for guiding the working fluid to the compression mechanism section, the rotor and the stator, the coil end section of the stator, and the oil sump, respectively. In a horizontal scroll compressor provided with, between the outer periphery of the coil end portion of the stator and the oil reservoir, a working fluid led to the coil end portion of the stator and the oil reservoir from the outflow hole of the flow dividing chamber, A horizontal scroll compressor characterized in that a shield plate for shielding the collision with the oil sump is provided.