JPH08326678A - Hermetic rotary compressor - Google Patents

Abstract

PURPOSE: To balance the static weight of the whole of a compressor in the installing condition of an external attached device so as to reduce vibration and noise at the time of operation by applying a load by which the static weight can be balanced against the load of the external attached device on a compressor main body. CONSTITUTION: An accumulator 20 serving as an external attached device is installed on the outer side part of a closed container 2 in a compressor main body 1 by connecting to an intake piping 11. In this case, a projection 61 serving as a mass body is projectingly formed on a part corresponding to the installing part of the accumulator 20 in the cylinder 6 of a rotary compressing element 5 housed in the closed container 2. The working point P1 of a load F1 by the projection 61 is set, for example, so that a distance L1 from the cross point Q of the axis P-P of the intake piping 11 and the axis O-O of a crankshaft 4 where the gravity center of the compressor main body 1 is positioned, and a distance L2 leading from the cross point Q to the working point 2 of a load F2 acted on the installing part of the accumulator 20, satisfy F1, L1=F2.L2 of the relational expression.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic rotary compressor mounted in, for example, an air conditioner or a refrigerator, and more particularly, to a whole structure due to the load of an external auxiliary device such as an accumulator mounted on the outer side of the compressor body. By maintaining a static static weight balance, vibration during operation is reduced and noise is reduced.

[0002]

2. Description of the Related Art Conventionally, a hermetic rotary compressor of this type is usually designed with a balanced balance so that the center of gravity of the compressor body is located on the central axis of the crank shaft of the electric element. It is the current situation.

[0003]

However, in the hermetic rotary compressor having such a conventional structure, an external auxiliary device such as an accumulator is attached to the outer side of the hermetic container constituting the compressor body by welding or the like. In addition, the overall static weight balance (rotational moment) due to the load of this external accessory becomes unbalanced, and when operating in this state, a large vibration is generated due to the exciting force during operation, which causes However, there was a problem of increasing noise.

An object of the present invention is to provide a hermetically-sealed rotary compressor capable of reducing vibration during operation and noise.

[0005]

In order to solve the above-mentioned problems, the present invention relates to a hermetic rotary compressor in which an external accessory device such as an accumulator is attached to the outer side of a compressor body. A load is added to the main body so that a static weight balance can be maintained with respect to the load of the external accessory device.

[0006]

That is, according to the present invention, by adopting the above-mentioned configuration, the compressor is provided with a load capable of maintaining a static weight balance with respect to the load of an external auxiliary device such as an accumulator attached to the outer portion of the compressor body. Since it is added to the main body, the static weight balance (rotational moment) of the compressor as a whole is balanced when the external accessory is attached.
As a result, vibration during operation can be reduced and noise can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows the overall construction of a hermetic rotary compressor according to the present invention, in which 1 is a compressor body.

In this compressor body 1, an electric element 3 is housed in an upper part of a closed container 2, and a rotary compression element 5 driven by a crankshaft 4 of the electric element 3 is provided in a lower part thereof.
Is stored.

The rotary compression element 5 includes a cylinder 6 fixed to the inner peripheral side wall of the hermetically sealed container 2, and upper and lower bearing members 7 for pivotally supporting the crankshaft 4 arranged above and below the cylinder 6. 8 and a piston roller 9 provided on an eccentric shaft 4a of the crank shaft 4 which is pivotally supported by the upper and lower bearing members 7, 8, and the piston roller 9 is connected to the crank shaft 4 of the electric element 3. By eccentrically rotating, the suction gas sucked from the suction port portion 10 of the closed container 2 through the suction pipe 11 is compressed, and the compressed high-pressure suction gas is opened to the upper bearing member 7 side. It is configured to discharge to the high-pressure portion side in the closed container 2 through the discharge ports 12 and 13.

Reference numeral 20 in the figure is an accumulator 20 as an external accessory device for separating the suction gas, which is attached to the outer side of the hermetic container 2 constituting the compressor body 1, into gas and liquid.
The accumulator 20 is attached to the suction pipe 11 by welding or the like.

Then, a protrusion 61 as a mass body is integrally or separately projected at a portion corresponding to the attachment portion of the accumulator 20 of the cylinder 6 constituting the rotary compression element 5 housed in the closed container 2. The point of action P1 of the load F1 due to the formation of the protrusion 61 is formed, for example, with respect to the central axis P-P of the suction pipe 11 and the compressor body 1
The distance L1 from the intersection Q with the central axis O-O of the crankshaft 4 where the center of gravity of the crankshaft 4 is located, and the distance L2 from this intersection Q to the point P2 of action of the load F2 acting on the mounting portion of the accumulator 20 are F1. It is set so that the relational expression of L1 = F2 · L2 is satisfied, that is, the static weight balance (rotational moment) of the entire compressor body 1 in the mounted state of the accumulator 20 is maintained in equilibrium.

In the above embodiment, the position where the mass body is formed on the compressor body 1 is not limited to the cylinder 6, and the mass body may be integrated with or separate from other components other than the cylinder 6. It may be formed in.

[0013]

As is apparent from the above description, according to the present invention, a compressor is provided with a load capable of maintaining a static weight balance with respect to a load of an external auxiliary device such as an accumulator attached to the outer side of the compressor body. Since it is added to the main body,
The balance (rotational moment) of the static weight of the entire compressor in the mounted state of the external accessory is balanced, whereby vibration during operation can be reduced and noise can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a hermetic rotary compressor according to the present invention.

[Explanation of symbols]

1 ... Compressor main body, 61 ... Protrusion (mass body), 20 ... External accessory device (accumulator), OO ... Central axis of compressor main body, F1 ... Load by protrusion, F2 ... Load by external accessory, P1 ... Point of action of load by protrusion, P2 ... Point of action of load by external accessory, L1 ... Action of load by protrusion from central axis of compressor body Distance to the point, L2 ... Distance from the central axis of the compressor body to the point of action of the load by the external accessory device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Reiko Kambayashi 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A hermetic rotary compressor in which an external accessory device such as an accumulator is attached to the outer side of the compressor body, wherein a static weight balance is achieved in the compressor body against the load of the external accessory device. A hermetic rotary compressor characterized by having a load that can be maintained.