JPH01244191A - Enclosed rotary compressor - Google Patents

Abstract

PURPOSE:To make improvements in refrigerating capacity in quickening a compression starting position by installing a notch leading to an inlet port and a compression space and being equal in each area, in a cylinder wall, and forming an opening to the compression space of the notch in a spot nearer to a vane groove. CONSTITUTION:A motor element is constituted of a stator 1 and a rotator 2, and motive power produced by this motor element is transmitted to a piston 7 by a crankshaft 3. A cylinder 6 is set up around this piston 7, and an end face of the cylinder 6 is closed by an upper end plate 4 and a lower end plate 5. A notch 9 piercing through both these end faces is installed in the cylinder 6, and it leads to an inlet port 8 and a compression space 10. In this notch 9, its area leading to the inlet port 8 is equal to that leading to the compression space 10, and an opening leading to the compression space 10 is formed in such a form as becoming nearer to a vane groove 11. With a sucklike form constitution, a compression starting position can be quickened without having a suction area changed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hermetic rotary compressor constituting a refrigeration cycle.

Prior Art Conventionally, as shown in FIG. 3, the suction port 8 was cylindrical and communicated with the compression chamber. Therefore, one way to improve efficiency is to reduce the resistance when suctioning refrigerant.
The resistance during suction was reduced by increasing the opening area to the compression chamber 1o and by increasing the cross-sectional area of the suction port B.

Problems to be Solved by the Invention In such a conventional suction port configuration, the suction area can be increased by increasing the opening area and cross-sectional area of the suction port, but since the opening of the suction port is widened, it is difficult to start compression. The position was delayed, the compressed volume was reduced, and the refrigeration capacity was reduced, so no improvement in efficiency could be expected even though the suction resistance was reduced.

An object of the present invention is to improve compression efficiency.

Means for Solving the Problems In order to solve the above problems, the present invention provides a notch in the cylinder wall of the cylinder that communicates with the suction port and the compression chamber, and determines the area where the suction port and the notch communicate, and the area between the compression chamber and the notch. The area of communication is made equal, and the opening of the notch to the compression chamber is placed closer to the vane groove.

Effects of the present invention With the above-described configuration, the compression start position can be made earlier without changing the suction area, which is the cause of suction resistance.
Refrigeration capacity and efficiency can be improved.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

FIG. 2 shows an embodiment of the present invention, in which an electric motor element is composed of a stator 1 and a rotor 2, and power generated by this electric motor element is transmitted to a piston 7 through a crankshaft 3. A cylinder 6 is disposed around the piston 70, and the end surfaces of the cylinder 6 are closed by an upper end plate 4 and a lower end plate 5. As shown in FIG. 2, the cylinder 6 is provided with a notch 9 passing through both end faces, communicating with the suction port 8 and the compression chamber 10. The notch 9 is formed in such a shape that the area communicating with the suction port 8 is equal to the area communicating with the compression chamber 1o, and the opening communicating with the compression chamber 10 is closer to the vane groove 11. With such a configuration, the compression start position can be made earlier without changing the suction area compared to the conventional one. Therefore, the refrigerating capacity can be improved without changing the suction resistance, and the efficiency can also be improved.

As described in detail of the invention, the hermetic rotary compressor of the present invention has a space provided in the cylinder wall of the cylinder, which communicates with the suction port and the compression chamber, and which penetrates both end surfaces of the cylinder, and which communicates with the suction port. The area of the cutout and the area communicating with the compression chamber were made equal, and the opening communicating with the compression chamber was formed closer to the vane groove.

This allows the compression start position to be moved earlier without changing the suction area, thereby improving the refrigerating capacity and efficiency.

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view of the main parts of a hermetic rotary compressor according to an embodiment of the present invention, Fig. 2 is a sectional view of the same compressor, and Fig. 3 is a main part of a conventional hermetic rotary compressor. It is an enlarged sectional view. 6...Cylinder, 8...Intake port, 9...
...Notch, 10...Compression chamber. Name of agent: Patent attorney Toshio Nakao and 1 other person6-
--Nwander 8-Suction port 9-Notch 1 rlA to-75-m t// Fig. 3/1

Claims (1)

[Claims] A rotary compressor is constructed by sealing an electric motor element and a compressor element driven by the electric motor element, and a cylinder wall of a cylinder constituting the compressor element has a suction port and a compression chamber connected to each other, and a cylinder wall at both ends of the cylinder. A closed rotary compressor that has a space that passes through the surface, and a notch that has an equal area leading to the suction port and a compression chamber, with the opening leading to the compression chamber being closer to the vane groove.