JPS6282291A - Closed type rotary compressor - Google Patents

Abstract

PURPOSE:To realize longer life of a compressor by constituting the compressor through a process of inserting a bent portion provided on the end part of a cylindrical coil spring in the bulkhead direction, into a fixing hole provided on the notch of the bulkhead and by making the notch of the bulkhead in secure contact with the cylindrical coil spring. CONSTITUTION:A fixing hole 14 is provided on the notch 9 of a bulkhead 8 partitioning the inside of a cylinder 5 into an intake chamber 6 of coolant and a compression chamber 7. And a bent portion 15 bent in the bulkhead 8 direction is provided on the end part of a cylindrical coil spring 10 with which the notch 9 of the bulkhead 8 makes contact and the bent portion 15 is inserted into the fixing hole 14. The cylindrical coil spring 10 generates resonance at a certain running number of the compressor but as the bent portion 15 is inserted into the fixing hole 14 of the bulkhead 8, the cylindrical coil spring 10 comes in secure contact with the bulkhead 8. Then deformation of the coil spring 10 can be prevented and life of the compressor can be prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a structure for ensuring contact between a partition plate and a cylindrical coil spring of a hermetic rotary compressor comprising a refrigeration cycle (Vf).

2. Description of the Related Art An example of a conventional hermetic rotary compressor is shown in FIGS. 4, 5, and 6, and its problems will be explained.

A conventional hermetic rotary compressor includes a hermetic container 1, an electric motor element 2, and a crankshaft 3 driven by the electric motor element 2.
, a piston 4 rotatably fitted to the crankshaft 3
．． A cylindrical cylinder S containing the histones, a partition plate 8 that reciprocates with its tip in contact with the piston 4 and divides the wQ medium inside the cylinder 5 into a suction chamber 6 and a compression chamber 7;
A cylindrical coil spring 10 contacts the cylindrical coil spring contact notch 9 of the partition plate 3 and biases the partition plate 2. The compressor element 13, which is formed by an upper bearing end plate 11 and a lower bearing end plate I2, which support the crankshaft 3 and close the openings at both ends of the cylinder 5, is housed therein.

- The operation of the hermetic rotary compressor configured as above will be explained below.

The crankshaft 3 is driven and rotated by the electric motor element.

The partition plate 8 is pushed toward the outer circumference by the piston 40 rotations, and the cylindrical coil spring 10 is in contact with the cylindrical coil spring contact notch 9 of the partition plate 80.
The cylindrical coil spring 10 urges the partition plate 8 to make reciprocating motion in contact with the piston 4.

Problems to be Solved by the Invention However, in the above configuration, a gap is provided between the cylinder 5 and the partition plate 8 so that the cylinder 5 and the partition plate 8 can slide freely.
The partition plate 8 tilts due to the pressure difference between the compression chamber 7 and the suction chamber 6 and performs a reciprocating motion. Therefore, when the cylindrical coil spring 10 resonates at a certain number of rotations, and the stress generated in the cylindrical coil spring 10 that urges the partition plate 8 changes, and the partition plate 8 and the cylindrical coil spring 0 become separated for a moment, the cylindrical coil spring 10 becomes the partition. It may not fit accurately into the notch 9 of the plate 8.

There was a problem in that the cylindrical coil spring was abnormally deformed and damaged.

In view of the above-mentioned problems, the present invention aims to ensure that the cylindrical coil contact notch of the partition plate and the cylindrical coil spring are in contact with each other.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a fixing hole in the notch of the partition plate, and a fixing hole in the end of the cylindrical coil spring in contact with the notch of the partition plate in the direction of the partition plate. A six-bent portion is provided on the holder, and this bent portion is inserted into the fixing hole.

Effect: With the above-described configuration, even when the cylindrical coil spring resonates at a certain rotation speed and the force that biases the partition plate generated in the cylindrical coil spring fluctuates, the bent portion of the cylindrical coil 7 is provided on the partition plate. Since the five cylindrical coil springs are inserted into the fixing holes of the notch portions, the five cylindrical coil springs reliably contact the cylindrical coil spring contact notch portions of the partition plate.

EXAMPLE Below, FIGS.
This will be explained with reference to the diagram.

First, the schematic structure of a hermetic rotary compressor will be explained with reference to FIGS. 1, 2, and 3.

In the figure, reference numeral 1 denotes a closed container, inside which is a motor element 2 and a crankshaft 3 driven by the motor element 2.
, a piston 4 rotatably fitted to the crankshaft 3
．． A cylindrical cylinder 5 houses the piston 4, and a partition plate 8 makes reciprocating motion with its tip in contact with the piston 4 and divides the inside of the cylinder 5 into a refrigerant suction chamber 6 and a compression chamber 7.
．． A cylindrical coil spring 10 contacts the notch 9 of the partition plate 8 and biases the partition plate 8. an upper bearing end plate 11 that supports the crankshaft 3 and closes openings at both ends of the cylinder 5;
- The compressor element 13t formed by the lower bearing end plate 12 is housed. Furthermore, a fixing hole 14 is provided in the notch 9 of the partition plate 8, and in the cylindrical coil spring 10,
A bent portion 15 bent in the direction of the partition plate 8 is provided at the end of the partition plate in contact with the notch 9, and this bent portion 15 is inserted into the fixing hole 14.

Regarding the hermetic rotary compressor configured as above,
The operation will be explained below.

The crankshaft 3 is driven by the electric motor element 2, and the piston 4 fitted on the crankshaft 3 rotates inside the cylinder 5 along its inner circumference.

The partition plate 8 is pushed toward the outer circumference by the piston 40 rotations, and a cylindrical coil spring 10 is in contact with the notch of the partition plate 8, and the partition plate 8 is biased by this cylindrical coil spring 10.

It makes reciprocating motion in contact with the piston 4. A gap is provided between the cylinder 5 and the partition plate 8 so that they can slide freely, and the partition plate 8 tilts due to the pressure difference between the compression chamber 7 and the suction chamber 6 and performs a reciprocating movement. The cylindrical coil spring 10 generates resonance at the rotation speed. As a result, the stress generated in the cylindrical fill spring 10 that biases the partition plate fluctuates, but since the bent portion 15 is inserted into the fixing hole 14 of the partition plate 8, one cylindrical coil panel 1
0 makes sure contact with the partition plate portion.

Therefore, deformation of the coil spring 8 is also prevented.

Effects of the Invention As described above, the present invention provides a fixing hole in the notch of the partition plate, and inserts the bent part provided at the end of the cylindrical coil spring in the direction of the partition plate into the fixing hole. This ensures reliable contact between the cylindrical coil springs and extends the life of the compressor.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a partition plate portion of a hermetic rotary compressor according to an embodiment of the present invention, FIGS. 2 and 3 are a longitudinal sectional view and a transverse sectional view of the same compressor, and FIG. FIG. 5 is a longitudinal sectional view of a conventional hermetic rotary compressor;
and a cross-sectional view, and FIG. 6 is a view corresponding to FIG. 1 of the same compressor. 1... Airtight container, 2... Electric motor element,
8...Partition plate, 9...Notch part,
10... Circumferential coil spring, 13-... Compressor element, 14... Fixing hole. 15...Bending part. Figure 1 Figure 3 Figure 4 Figure Z Figure 5 t. Figure 8--I cutting board 10-11 Cylindrical coil year? ---Notch 1 section

Claims (1)

[Claims] Inside the sealed container, there is an electric motor element, a crankshaft driven by the electric motor element, a piston rotatably fitted to the crankshaft, a cylindrical cylinder housing the piston, and a cylinder that moves reciprocatingly with its tip in contact with the piston. a partition plate that divides the inside of the cylinder into a refrigerant suction chamber and a compression chamber;
A compressor element is housed, which is formed by a cylindrical coil spring that contacts the notch of the partition plate and biases the partition plate, and upper and lower bearing end plates that support the crankshaft and close openings at both ends of the cylinder. A fixing hole is provided in the notch of the partition plate, a bent part bent in the direction of the partition plate is provided at the end of the cylindrical coil spring in contact with the notch of the partition plate, and this bent part is inserted into the fixing hole. Closed type rotary compressor.