JPH09189293A - Rotary refrigerant compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise of a compressor by arranging a vane holding groove on the outer peripheral part of a roller which is eccentrically rotated in a cylinder in the axial direction of the roller so as to fit to the top end of a vane, and arranging a half-closing shaped groove part on the rotator of a motor. SOLUTION: A motor which consists of a rotator 2a and a stator is housed in an enclosed casing, and a compressor part driven by the motor is fixed. The compressor abuts on a roller which is eccentrically rotated in a cylinder, and it is constituted by a vane for dividing the inside of the cylinder into an intake chamber and a compressing chamber. A vane holding groove is arranged on the outer peripheral part of the roller of the compressor part in the axial direction of the roller so as to fit to the top end of the vane, and a half closing shaped groove 19 is formed on the rotator of the motor. It is thus possible to reduce noise of the compressor caused by increase of electromagnetic noise at the time of operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary refrigerant compressor used in refrigerators and the like.

[0002]

2. Description of the Related Art Conventionally, the tip of a vane of a rotary refrigerant compressor has a semi-circular shape and is in line contact with a cylindrical roller. However, this method has a problem that the contact pressure between the vane and the roller is high and the vane and the roller are easily worn. As one conventional example of the countermeasures against this point, for example, Japanese Utility Model Laid-Open No. 57-8438.
Some of them are described in Japanese Patent No. 4, etc.

This will be described with reference to FIGS. 4 to 7
In FIG. 1, 1 is a closed casing having a suction pipe 1 a and a discharge gap 1 b, in which a rotor 2 and a stator 3 are provided.
The motor 4 consisting of and the compressor unit 5 driven by this motor 4 are fixed. The rotor 2 has a groove portion 6 of a fully closed shape, and the appearance is covered with an electromagnetic rope 7, and the aluminum bar 8 cannot be seen directly.

The compressor section 5 will be described in detail below.
Is a cylinder in which a roller 11 rotatably fitted to a part of the eccentric rotary shaft 10 is installed. In addition, the compression space in the cylinder 9 is provided in a part of the cylinder 9 and the suction chamber 12
A vane 14 for partitioning the compression chamber 13 and the compression chamber 13 is provided in a vane groove 15 so as to be retractable and retractable, and one end of the vane 14 is provided in the groove 15 on the outer circumference of the roller 11.
A spring (not shown) is arranged so as to always come into contact with the vane holding groove 16 having a semicircular cross section. A main bearing 17 that supports the shaft 10 at both ends of the cylinder 9 and closes an end surface of the cylinder 9, and an auxiliary bearing 1
8 are provided.

In the above structure, when the motor 4 is driven, the gas sucked from the suction pipe 1a as the roller 11 rolls is compressed from the suction chamber 12 through the compression chamber 13,
It is discharged to the system from the discharge pipe 1b. In the specification that the vane holding groove 16 provided on the outer circumference of the roller 11 is not provided in the process of compressing the gas, the roller 11 is rotated at a certain speed during operation, and therefore, depending on severe operating conditions. , Vane 14 and roller 11
There was a case where wear was generated on the outer circumference of the vane. However, in this example, since the vane holding groove 16 is provided on the outer circumference of the roller 11, the tip of the vane 14 is located at the tip of the vane holding groove 1 during operation.
Since it fits in 6, the rotation of the roller 11 did not occur, and the occurrence of wear could be reduced.

[0006]

However, in the above-mentioned conventional structure, when the compressor is in operation, the electromagnetic noise around 400 to 500 Hz becomes high due to the complicated behavior of the tip of the vane in the vane holding groove, and There was a problem that noise increased.

The present invention is intended to reduce noise in a rotary refrigerant compressor.

[0008]

In order to solve this problem, in the present invention, in a rotary refrigerant compressor, a groove is provided on the outer periphery of a roller so that the tip of a vane can be fitted, and a rotor of a motor. Is configured to have a semi-closed groove portion.

With the above structure, in the system in which the tip of the vane is inserted into the groove on the outer periphery of the roller, even if the electromagnetic noise increases during operation, the rotor provided with the semi-closed groove portion generates the electromagnetic noise. Since there is almost no compressor, the operating noise of the compressor can be suppressed to the same level of noise as that of the compressor, which does not have the groove inside the outer circumference of the roller.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention includes a motor, a cylinder, and a motor which are housed in a closed casing.
An eccentric rotary shaft, a roller, and a compressor unit including a vane, and the like, and a vane holding groove in the axial direction is provided on the outer periphery of the roller of the compressor unit so that the tip of the vane is fitted, and The rotor is provided with a semi-closed groove portion and has an action of reducing electromagnetic noise in the vicinity of 400 to 500 Hz.

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a side view of a rotor according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view thereof. In the figure, 2a is a rotor, which adopts a semi-closed groove portion 19. Aluminum bar 8 is exposed on the outer periphery,
You can see it directly. Due to its characteristics, the specifications of the groove portion 19 can almost suppress the generation of electromagnetic noise near 400 to 500 Hz. On the other hand, the method of providing the vane holding portion 16 on the outer circumference of the roller, which is adopted to suppress the wear of the vane and the roller, is 400 to 500 due to the complicated movement of the vane in the roller holding groove 16 that occurs during operation.
There was a characteristic that electromagnetic noise near Hz increased. FIG. 4A is a noise pattern in the vicinity of 400 to 500 Hz in the specification in which the conventional roller holding groove is not provided and the rotor is fully closed. (B) is a noise pattern in the vicinity of 400 to 500 Hz when the rotor has a conventional roller holding groove and the rotor has a fully closed shape. As can be seen from (a) and (b), an increase in electromagnetic noise can be seen in the specification having the roller holding groove and the groove portion of the rotor having a fully closed groove. However, (c) is a noise pattern in the vicinity of 400 to 500 Hz having the roller holding groove of the present invention and the rotor groove portion 19 having a semi-closed shape specification, and electromagnetic noise is significantly larger than that of (b). You can see that it is decreasing.

As described above, since the rotor 2a having the specifications of the semi-closed groove portion 19 has the characteristic of suppressing electromagnetic noise in the same region, the problem of noise increase can be solved by combining the two. It will be possible.

[0013]

As described above, in the rotary refrigerant compressor of the present invention, the groove of the roller in the axial direction is provided on the outer periphery of the roller so that the tip of the vane can be fitted, and the rotor of the motor is By adopting a semi-closed groove specification, the noise of the compressor does not increase due to the increase of electromagnetic noise during operation,
A rotary refrigerant compressor can be provided.

[Brief description of the drawings]

FIG. 1 is a side view of a rotor of a rotary refrigerant compressor according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 (a) is a characteristic diagram showing a noise pattern around 400 to 500 Hz in the specification without the conventional roller holding groove. (B) 40 in the specification with the conventional roller holding groove.
Characteristic diagram showing a noise pattern in the vicinity of 0 to 500 Hz. (C) 4 in the specification having the roller characteristic groove of the present invention
Characteristic diagram showing noise pattern around 00-500Hz

FIG. 4 is a longitudinal sectional view of a conventional rotary refrigerant compressor.

FIG. 5 is a side view of a rotor of a conventional rotary refrigerant compressor.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7A is a perspective view of essential parts of a roller of a conventional rotary refrigerant compressor. FIG. 7B is a perspective view of essential parts of a roller and a vane of the conventional rotary refrigerant compressor.

[Explanation of symbols]

 1 Hermetically-sealed casing 2a Rotor 4 Motor 9 Cylinder 10 Eccentric rotary shaft 11 Roller 12 Suction chamber 13 Compression chamber 14 Vane 16 Vane holding groove 17 Main bearing 18 Auxiliary bearing 19 Semi-closed groove

Claims (1)

[Claims] 1. A hermetically sealed casing, a motor housed in the hermetically sealed casing, a cylinder, a main bearing and a sub bearing fixed to both ends of the cylinder, and a rotatably mounted portion between the main bearing and the sub bearing. A roller that is housed and fitted to an eccentric rotation shaft, and that eccentrically rotates in the cylinder; and a compressor unit that is in contact with the roller and that includes a vane that divides the cylinder into a suction chamber and a compression chamber, A rotary refrigerant in which a vane holding groove is provided in the axial direction of the roller so that the tip of the vane is fitted to the outer periphery of the roller, and the rotor of the motor is provided with a semi-closed groove portion. Compressor.