JPS5865991A - Rotary compressor - Google Patents

Abstract

PURPOSE:To obviate a starting failure caused by strain, by truing up the direction made by opposite setting parts of a cylinder pressed in a closed case with the direction of magnetic attraction of a motor element's main winding, among rotary compression elements in a rotary compressor. CONSTITUTION:A cylinder 10 housing a rotor 12 has setting parts 8 and 9 for a closed case 2 at the outer surface part in its opposited diametral direction and it is pressed in the inner wall of the closed case 2 whereby secured thereto. On the other hand, a motor element 5 has both a main winding 3 and an auxiliary winding 4 but it is to be installed, as shown in illustration, by adjusting the direction of magnetic attraction produced out of the main winding 3 with the direction of said setting parts 8 and 9. With this, even when the magnetic attraction has acted, there produces no strain on the cylinder 10 at all and clearance between the rotor 12 and the cylinder 10 can be always kept in an optimum state so that a starting failure can be obviated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improving the startability of a rotary compressor,
At the time of starting, the magnetic attraction force of the main winding of the electric element causes distortion in the weak part, causing starting failure.
The purpose is to apply air suction force to prevent distortion and improve starting performance.

A conventional rotary compressor of this type is constructed as shown in FIGS. 1 to 6. (1) has an electric element (5) having a main winding (3) and an auxiliary winding (4) in the upper part of the airtight container (2), and a rotating shaft (6) driven by the electric element in the lower part. This is a rotary compressor constructed by press-fitting and housing a rotary compression element (7). 9), a roller σ3 which rotates eccentrically in the cylinder by an eccentric portion α of the rotating shaft (6), and the tip of the roller σ3 is pressed against the roller by an elastic means 3 to apply high pressure to rotate the cylinder. It is constituted by a sliding vane (161) that divides the chamber I and the low pressure chamber 1151.1ηα mark is the outer circumference of the stator σ■ of the electric element (5) and the outer circumference of the cylinder strike of the rotary compression element (5). This is a recess drilled in the rotary compression element for positioning the electric element and the rotary compression element.

In the rotary compressor configured in this way,
When the electric element (5) and the rotary compression element (7) are press-fitted into the inner wall of the closed container (2), the main winding (3J
Cylinder 1 was simply determined arbitrarily by positioning, ignoring the direction of the magnetic attraction force that occurs when starting the cylinder.
The magnetic attraction force of 3J acts on the thin part of the main winding 101, causing distortion and the fitting dimensions with the roller lI4 to be incorrect, causing poor starting and eventually causing burnout problems. occured.

Misfire 1 was made in consideration of the above points.

The following description will be made based on the embodiments shown in FIGS. 4 to 7.

The same parts as in FIGS. 1 to 6 are designated by the same reference numerals, and their explanation will be omitted.

Differences from Figures 1 to 6 &-1 The direction of the magnetic attraction force of the main winding (3) of the electric element (5) and the inner wall of the closed container (2) of the rotary compression element (7) of the cylinder (101) The point is that the opposing mounting portions 18H9) to be press-fitted are in the same direction.

In the rotary compressor configured in this way,
'The magnetic attraction force between the main winding (3) and the auxiliary winding (4) of the direct-acting element (5) at the time of starting is as shown in FIG.
The magnetic attraction force of 3) is about 5 times larger than the magnetic attraction force of the auxiliary winding f4J, and the magnetic attraction force of the auxiliary winding can be practically ignored, so it is less than the magnetic attraction force of the main winding (3). By aligning the opposite mounting parts +81 (91) which are press-fitted into the inner wall of the cylinder (11NlCD sealed cupboard (2)), the cylinder (in the direction in which the magnetic attraction force of the main winding (3) acts)
The wall thickness of 1α can be accommodated (81 (91) becomes thicker, the tonality becomes larger, and no attempt occurs, and the fitting dimension between the cylinder aα and roller l) 4 can be maintained at an appropriate clearance, thereby preventing starting failure. It can be prevented.

As described above, the present invention provides a rotary compressor in which an electric element having a main winding and an auxiliary winding and a rotating l:E compression element driven by the electric element are housed in a closed container. The power rotation of the cylinder, which constitutes the rotary compression element and is press-fitted and fixed to the inner wall of the closed container, is matched with the magnetic attraction force surface of the main winding of the electric element. For practical purposes, such as increasing the cylinder wall thickness in the direction of the magnetic attraction force generated by the main winding of the engine, and increasing the tonality of the cylinder to prevent distortion caused by the magnetic attraction force, improving startability. mouth with effect

[Brief explanation of drawings]

Figures 1 to 6 show conventional examples, where Figure 1 is a vertical cross-sectional view of a rotary compressor, Figure 2 is a line direction view along the ■-■' line in Figure 1, and Figure 6 is a line direction view of the rotary compressor in Figure 1. -1' Linear gyrus cross section, Figures 4 to ! Figure 86 is an embodiment of the invention, Figure 51I+4 is a cross-sectional view of the rotary contact wrench, and Figure 5 is the v of Figure 4.
v' line force direction cross-sectional view. FIG. 6 is a cross-sectional view taken along the line Vl-Vl' in FIG. 4, and FIG. l! 71 is a characteristic diagram showing the direction and strength of the magnetic attraction force of purple. (1)...Rotary combiner °% (2)...Airtight container s (3)...Main winding, (4)...Auxiliary winding, (5)...Electrical! lI element, (7)...Rotary compression element, rso9t...Mounting part, +101...Cylinder. Figure 1' ya 2゜Otsutafukotohege 1/

Claims (1)

[Claims] 1. In a rotary compressor in which an electric element having a main winding and an auxiliary winding and a rotary compression element driven by the electric element are press-fitted into a closed container, the magnetism generated by the main winding of the electric element A rotary compressor characterized in that the longitudinal direction of a cylinder, which constitutes a rotary compression element and is press-fitted and fixed to the inner wall of a closed container, is made to coincide with the direction of suction force.