JP2937895B2 - Rotary compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor, and more particularly to a rotary compressor capable of reducing vibration noise and compression loss.

[0002]

2. Description of the Related Art A conventional rotary compressor is shown in FIGS.
As shown in the figure, the cylinder 1 has a cylindrical shape, a slot 8 provided on the outer wall of the cylinder 1, a shaft 3 which rotates eccentrically in the cylinder 1, and revolves and revolves by eccentric rotation of the shaft 3. The roller 2, the suction chamber 6 in the cylinder 1, the suction port 11 formed to allow the refrigerant gas to flow in, and the gas compressed in the compression chamber 7 in the cylinder 1 are formed to flow out. Discharge port 10
And a vane 9 for reciprocating in the lot 8 to separate the compression chamber 7 and the suction chamber 6 by the rotation (eccentric movement) of the roller 2 accompanying the rotation of the rotary shaft 3, and a discharge for opening and closing the discharge port 10. It consists of a valve (not shown).

In the drawings, reference numerals 4 and 5 denote main / sub bearings for supporting the shaft 3, reference numeral 13 denotes a rotor of a driving motor integrated therewith, reference numeral 13a denotes a rotating shaft thereof, and reference numeral 14 denotes a stator. is there. As is clear from FIG. 4, the shaft 3 is eccentrically connected to the rotation shaft of the rotor 13.

In such a conventional rotary compressor, when the roller 2 makes an eccentric motion including rotation and revolution while being in contact with the cylinder due to eccentric rotation of the shaft 3 accompanying rotation of the rotor 13 of the driving motor, The gas in the compression chamber 7 is compressed from a position at a certain rotation angle, but the volume of the suction chamber 6 increases during the compression process, and the refrigerant gas flows into the suction chamber 6 through the suction port 11. As described above, the roller moves by the eccentric motion to compress the gas in the compression chamber 7, and when the pressure becomes larger than a predetermined value, the operation of opening the discharge valve and discharging through the discharge port 10 is repeated. Done. During this time, the vane 9 reciprocates in the slot 8 in a state of being in close contact with the outer peripheral surface of the roller 2.

However, in such a conventional rotary compressor, since the roller 2 performs an eccentric motion, not only large vibration and noise are generated due to the unbalanced mass, but also excessive compression loss due to the discharge valve and re-expansion. There is a problem that loss occurs. That is, the discharge valve opens at a pressure higher than a predetermined pressure in order to maintain airtightness, so that an over-compression loss occurs, and a part of the discharge gas expands in the compression chamber at a specific rotation position. There is a problem that expansion loss occurs.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the vibration noise caused by the eccentric movement of the roller, and at the same time to reduce the over-compression loss and the compression loss caused by the discharge valve. It is an object of the present invention to provide a rotary compressor capable of preventing re-expansion loss and improving performance.

[0007]

In order to achieve the above object, a rotary compressor according to the present invention comprises a cylindrical cylinder and a radially formed groove which rotates at an eccentric position in the cylinder. Rotating means having a rotating means, and a dividing means which rotates around the same center as the cylinder by the rotation of the rotating means outside the rotating means and is inserted into the groove to divide the internal space into a compression chamber and a suction chamber. The rotating means and the outer roller are configured to make a self-rotational movement at their respective centers.

[0008]

1 and 2 show the structure of a rotary compressor according to an embodiment of the present invention. The structure of the rotary compressor according to the present invention, except for the main part, is the same as that of the prior art described with reference to FIGS. But the rotor 1 of the drive motor
A rotary shaft 16 integrated with a roller, which is connected to a rotary shaft 13a of the cylinder 3 and rotates at an eccentric position in the cylinder 1;
6 has an outer roller 12 which rotates around the same center as the cylinder 1 outside the shaft by the rotation of 6. The shaft 16 has a groove 16a extending in a radial direction.
Are formed, and the groove 1 is formed in the outer roller 12.
A vane portion 12a inserted into 6a is formed radially inward. Therefore, the space inside the outer roller 12 and outside the shaft 16 is defined by the vane portion 1.
The compression chamber 18 and the suction chamber 17 are divided by 2a (see FIG. 3). A linear suction port 11a and an L-shaped discharge port 10a are formed on the outer wall of the cylinder 1, and a common port 15 is formed through the outer roller 12. The common port 15 is formed depending on the rotation angle of the shaft 16. It communicates with the suction port 10a.

The operation of the above embodiment of the present invention will be described with reference to FIGS. When the above-described roller-integrated rotary shaft 16 rotates at an eccentric position in the cylinder 1, A in FIG.
As B → D → C, the outer roller 12 rotates around the same center as the cylinder and compresses the refrigerant gas by continuously reducing the volume of the compression chamber 18. When the shaft 16 rotates and reaches a certain rotation angle, the common port 15 provided on the outer roller 12 matches the L-shaped discharge port 10 a provided on the cylinder, and the high-temperature and high-pressure refrigerant gas in the compression chamber 18. Is discharged through the common port 15 and the discharge port 10a. Subsequently, the shaft 16 rotates so that the common port 15 of the outer roller 12 becomes the suction port 11a of the cylinder.
And the low-temperature and low-pressure refrigerant gas flows into the suction port 11a.
And it is sucked into the suction chamber 17 through the common port 15.

[0010] At this time, since the rotating shaft 16 and the outer roller 12, each of which is integrally formed with the roller, perform only a rotation about their own center, vibration noise due to unbalanced mass is prevented. Further, in this case, since it is not necessary to use a valve for discharging the compressed refrigerant gas, over-compression loss and re-expansion loss are prevented.

The embodiment shown in FIG. 1 and FIG.
6 is connected to a rotating shaft 13a of a rotor 13 as a driving shaft, and the outer roller 12 is driven from a rotating shaft 16 via a vane portion 12a, but the driving relationship is reversed. This is the second embodiment shown in FIG.
In this example, the outer roller 12 'is a rotary shaft 13a of the rotor.
And the rotary member 16 'is driven via the vane portion 12a. The rotating member 16 'has a groove 16a for receiving the vane portion 12a, and the rotating shaft portion 16b is supported by the auxiliary bearing 5' eccentric with respect to the rotating shaft 13a of the rotor. In this case, the same operation and effect as those of the above-described embodiment can be obtained.

[0012]

As described above, according to the present invention, since the rotating shaft and the outer roller only rotate, there is no vibration and noise due to the unbalanced eccentric movement, and the discharge can be performed. Since no valve is used, over-compression and re-expansion loss due to the discharge valve can be prevented, so that the performance and efficiency of the compressor can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a rotary compressor according to the present invention.

FIG. 2 is a sectional plan view of a compression section of the rotary compressor according to the present invention.

FIG. 3 is an explanatory view of a compression operation of the rotary compressor according to the present invention.

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

FIG. 5 is a plan sectional view of a compression section of a conventional rotary compressor.

FIG. 6 is a longitudinal sectional view showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cylinder 10a ... Discharge port 11a ... Suction port 12 ... Outer roller 12a ... Vane part 15 ... Common port 16 ... Rotating shaft 16a ... Groove 17 ... Suction chamber 18 ... Discharge chamber

Claims (1)

(57) [Claims] A rotating means having a groove formed in a radial direction while rotating at an eccentric position in the cylinder; receiving a rotation of the rotating means outside the rotating means; An outer roller having a dividing means which rotates around the same center as the cylinder and is inserted into the groove to divide the internal space into a compression chamber and a suction chamber; and wherein the rotating means and the outer roller are respectively provided. in the Carlo Tari compressor is configured to the rotation motion at the center, said rotating means, contact the eccentric position within the outer roller
A rotating shaft of the roller integral rotating you are, the dividing means, the outer roller being inserted into the groove
A vane section that divides the internal space into a compression chamber and a suction chamber.
If a common port is formed through the outer roller,
In both cases, the intake and discharge ports are formed in the cylinder.
When the rotation axis reaches a certain rotation angle,
The port and the discharge port communicate, and compressed refrigerant gas
Discharged, and then the common port and the suction port communicate to cool
Characterized in that the medium gas is configured to be sucked in.
Rotary compressor.