JPS6394092A - Closed-type rotary compressor - Google Patents

Abstract

PURPOSE:To miniaturize a closed type, rotary compressor and enhance the weld-workability to the compressor, by forming a projected part, which faces outward, on a side wall of a closed case, which is situated facing the outer peripheral surface of the lower coil end of a motor, and installing a feeding terminal to this projected part. CONSTITUTION:A feeding terminal 15 is arranged, taking advantage of a space surrounded by the lower coil end 3b of a motor 2, a cylinder block 8, and a side wall, of a closed case 1, and is installed to a projected part 13 that is formed on the side wall of a closed case 1 in such a manner that it projects outward, facing the outer peripheral surface of the lower coil end 3b of the motor 2. With this constitution, it becomes unnecessary to increase the height of the closed case 1 for the sake of the feeding terminal 15, while it can be avoided that the closed case 1 is deformed because of the stress caused by drilling of an installation hole to the feeding terminal 15. As a result, the weld- workability of the closed case 1 can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a rotary compressor in which a rotary refrigerant compressor and an electric gj machine for driving the compressor are housed in a sealed case.

(b) Conventional technology In general, rotary compressors have less vibration than reciprocating compressors and require less eccentricity of the crank, so they are suitable for downsizing the airframe, especially in hermetic compressors. be.

However, in most conventional hermetic rotary compressors, a compression device and an electric motor for driving the compression device are simply press-fitted into a cylindrical hermetic case. No effort was made to reduce the overall height of the compressor.

Therefore, as disclosed in Japanese Unexamined Patent Publication No. 58-150092 and shown in FIG. cylinder block 2
By utilizing the space surrounded by the recess 25 of No. 4 and the bottom wall 26 of the sealed case 20, the height of the sealed case 20 can be reduced and the compressor can be downsized. be.

(c) Problems to be solved by the invention However, according to the above configuration, the power supply terminal 2
2 is mounted close to the bottom wall 26 of the sealed case 2o, and is flush with the side wall of the press-fitted portion of the cylinder block 24. Therefore, when forming the hole 27 of the terminal 22 in the side wall of the sealed case 20, There was a problem in that the stress during drilling tends to affect the lower opening of the sealed case 2o and the press-fitted part of the cylinder block 24, and the sealed case 2o is easily distorted at the lower opening and the press-fitted part, and the roundness is easily lost. This problem results in deterioration of the yield when welding the cylindrical case body 20a and the bottom cover 20b, as well as poor fitting between the case body 20a and the cylinder block 24 (2), resulting in poor welding workability. This will reduce reliability. In addition, in such a configuration, since the welded part between the case body 20a and the bottom cover 20b and the terminal 22 are close to each other, the terminal 22 is easily affected by heat during welding, and the quality of the insulation part of the terminal 22 is affected. Furthermore, since the terminal 22 is located low, the lead wire connected to the outer terminal pin of the terminal is likely to come into contact with the floor and be damaged.

The present invention was made in view of the above points, and while maintaining the conventional convenience of reducing the height of the sealed case and thereby downsizing the compressor, it also maintains the welded part of the sealed case and the press-fitted part of the case with the cylinder block. The purpose is to increase the accuracy of welding and improve welding workability and reliability.

(d) Means for Solving Problems The present invention comprises a cylindrical sealed case, an electric motor press-fitted with its axis parallel to the central axis of the sealed case, and a rotary refrigerant driven by the electric motor. The refrigerant compression device has a cylinder block that is press-fitted into a sealed case, and a terminal for power supply to the electric motor is provided on the side wall of the sealed case, and is surrounded by the motor, the cylinder block, and the sealed case. In the hermetic rotary compressor, which is installed in a space that utilizes a space, a protrusion that protrudes outward is provided on a side wall of the hermetic case at a position facing the outer peripheral surface of the lower coil end of the motor. and the power feeding terminal is attached to this protrusion.

(e) Operation of the sealed rotary JE compressor of the present invention With the above configuration, the power supply terminal attached to the side wall of the sealed case is arranged using the space surrounded by the electric motor, the cylinder block, and the sealed case. By doing so, while maintaining the conventional convenience of reducing the height of the sealed case and making the compressor smaller, the side wall facing the outer peripheral surface of the lower coil end protrudes outward, and this protruding part By attaching the terminal to the space, the power supply terminal can be attached as high as possible on the side wall corresponding to the space, and the stress generated when drilling the hole in the terminal can cause damage to the lower opening of the case body or the cylinder block. This reduces the distortion of the press-fitted part of the cylinder block and improves the circularity of the closed case at the lower opening and the press-fitted part, thereby improving the welding workability of the closed case and the precision of the bottom metal of the cylinder block.

(f) Examples Examples of the present invention will now be described based on the drawings. 1 is a case body 1a and an upper lid 1b that closes the upper and lower openings of this body.
It is a closed case consisting of a lower lid 1c and a lower lid 1c. Reference numeral 2 denotes an electric motor which is press-fitted into the sealed case 1 with its axis parallel to the central axis of the case. This electric motor consists of a stator 4 having a coil 3 wound thereon, and a rotary shaft 5 which will be described later.
The lower coil end 3b of the coil is formed to have a smaller outer diameter than the upper coil end 3a.

Reference numeral 7 denotes a rotary refrigerant compression device driven by the electric motor 2 via the rotating shaft 5, and this device includes a closed case 1.
a cylindrical cylinder block 8 press-fitted into the cylinder block 8; an end plate 9.10 that closes the opening of the cylinder 8a; a roller 11 that is inserted into the rotating shaft 5 and rotates eccentrically within the cylinder 81;
From the vane 12 whose tip is always in contact with this roller and divides the inside of the sill 82 into a high pressure side and a low pressure side? ,'＝
It is made up of ¥. Reference numeral 13 denotes a protrusion formed on the side wall of the sealed case 1 at a position facing the outer peripheral surface of the lower coil end 3b of the electric motor 2, and this protrusion is pushed outward from the surface of the side wall by a seat pressing process. It is formed to protrude by about .51TIII, and a hole 14 is completely formed in the center. Reference numeral 15 denotes a power supply terminal that passes through the hole 14 of the protrusion 13 and is completely attached to the protrusion. That is, this terminal can be disposed by utilizing the space surrounded by the lower coil end 3b of the electric motor 2, the cylinder block 8, and the side wall of the sealed case 1.
It is installed in a position that is turned outward by 3.

In the hermetic rotary compressor configured in this way, the power supply terminal 15 attached to the side wall of the hermetic case 1 is connected to the lower coil end 3b of the electric motor 2, the cylinder block 8, and the side wall of the hermetic case 1. Because it is installed by effectively utilizing the space surrounded by
In addition to being able to reduce the height of the compressor and making the compressor smaller, a protrusion 13 is provided on the side wall at a position facing the outer peripheral surface of the lower coil end 3b, and the terminal 15 is attached to this protrusion. , and lower coil end 3
By reducing the outer diameter of b, power supply terminal 1
5 can be mounted as high as possible on the side wall corresponding to the space, and when drilling the hole 14 of the terminal 15,
By preventing the perforation stress from being transmitted to the lower opening of the case body 1a and the press-fitted part of the cylinder block 8 as much as possible, distortion of the lower opening and press-fitted part of the case is reduced, and the closed case 1
By improving the roundness of the cylinder, it is possible to improve the welding workability of the sealed case 1 and the precision of the bottom metal of the cylinder block 8. Also, here, the position of the power supply terminal 15 is changed to the position of the electric motor 2.
A recess between the main windings at the lower coil end 3b of
Alternatively, the above-mentioned effect can be further enhanced by making it correspond to the recess between the main winding and the auxiliary winding. Furthermore, it is also effective to shorten the length of the terminal bin inside the sealed case 1 of the terminal 15.

In addition, by arranging the power supply terminal 15 as high as possible on the side wall corresponding to the space, the case body 1
It is possible to suppress the heat transmitted to the terminal when welding a and the bottom cover 1c, and the quality of the insulating part (glass part, etc.) of the terminal is not deteriorated. This also reduces the risk of lead wires contacting the floor and being damaged.

(g) Effects of the Invention As described above, the present invention includes a cylindrical sealed case, an electric motor press-fitted with the axis parallel to the central axis of the sealed case, and a rotary refrigerant compressor driven by the electric motor. The refrigerant compression device has a cylinder block that is press-fitted into a sealed case, and a terminal for power supply to the electric motor is surrounded by the motor, the cylinder block, and the sealed case on the (II wall) of the sealed case. In a hermetically sealed rotary compressor that is installed by utilizing a closed space, a protrusion protruding outward is provided on a side wall of the hermetically sealed case at a position facing the outer peripheral surface of the lower coil end of the electric suction. Since the power supply terminal is attached to this protrusion, the power supply terminal can be placed as high as possible in the space while maintaining the convenience of reducing the height of the sealed case. , and the stress when drilling the terminal hole is reduced.
It reduces the distortion of the lower opening of the case body and the press-fitted part of the cylinder block, and improves the roundness of the sealed case, making it easier to weld the sealed case and the bottom metal of the cylinder block. Accuracy can be increased.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a hermetic rotary compressor showing an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a hermetic rotary compressor showing a conventional example. 1... Sealed case, 2... Electric motor, 3b...
Lower coil end, 7... Refrigerant compression device, 8...
・Cylinder block, 13...Protruding part, 15
...Power supply terminal. Applicant Sanyo Electric Co., Ltd. and one other agent Patent attorney Takuji Nishino and one other person Figure 1 8a Ic 12 Figure 2

Claims (1)

[Claims] (1) It consists of a cylindrical sealed case, an electric motor press-fitted with the axis parallel to the central axis of the sealed case, and a rotary refrigerant compression device driven by the electric motor. The sealed case has a cylinder block that is press-fitted into the sealed case, and a terminal for power supply to the electric motor is disposed on the side wall of the sealed case, making use of the space surrounded by the motor, the cylinder block, and the sealed case. In the type rotary compressor, a side wall of the sealed case facing the outer peripheral surface of the lower coil end of the electric motor is provided with a protrusion that protrudes outward, and the power supply terminal is attached to the protrusion. A hermetic rotary compressor that is characterized by: