JPS6285186A - Closed type motor-driven compressor - Google Patents

Abstract

PURPOSE:To reduce the size of a closed type compressor, by a method wherein the coil ends, positioned on the side opposite to a compressor, of the stator winding of an electric motor are formed in a way to be bent and protruded inwardly from the inner bore of a stator. CONSTITUTION:Coil ends 9 and 10, positioned on the side opposite to a compressor 3, of a stator 5 winding of an electric motor 4 placed in a closed container 2 are formed in a manner to be protruded inwardly from the inner bore of the stator. This enables shortening of the outer size in a radial direction of the coil ends 9 and 10 of the stator winding without lowering of performance of the electric motor, resulting in the possibility to employ a spherical closed container and reduce the size of a closed type compressor.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hermetic electric compressor used in refrigerators, near conditioners, and the like.

BACKGROUND OF THE INVENTION In recent years, compressors have been trending toward smaller sizes and lighter weights, and the closed containers of reciprocating compressors have been made spherical in order to reduce noise. An example of the conventional electric compressor mentioned above will be described below with reference to the drawings.

FIG. 2 is a sectional view of the compressor. 1 is a hermetic electric compressor, 2 is a hermetic container, and 3 is a compression element. 4 is airtight container 2
The motor-driven element provided inside the motor is composed of a stator 5 and a rotor 6. γ is a rotating shaft connected to the electric element 4 via the bearing portion 8 of the compression element 3. Reference numerals 9 and 10 denote coil ends of the stator, which extend in the vertical direction in FIG. Moreover, the compression element 3 is located above the electric element 4. In the compressor configured as described above, the compression element 30 located on one side with respect to the axis of the rotating shaft 7 has a long radial length, so the rotating shaft 7 is connected to the sealed container 2 in the same direction as the axis of the core rotating shaft. The airtight container 2 is made spherical by being shifted toward the reaction pressure line element side from the center line 11 of the airtight container 2.

Problems to be Solved by the Invention However, in the above configuration, the upper end of the radial outer circumference of the compression element 3 and the lower coil end 10 of the electric element 4 are close to the spherical closed container 2 on the lower surface side, and when starting and stopping, A certain gap must be provided to prevent collisions during transportation, and the sealed container 2 has become larger than necessary. This is because the upper end of the radial outer periphery of the compression element 3 and the radial length of the coil end 1o on the side opposite to the compression element with respect to the axis of the rotating shaft 7 become longer.

Means to solve the problem In order to solve the above problem, the coil end on the side opposite to the compression element of the stator winding of the electric element was formed inside the inner diameter of the stator, and the compression element was connected through the rotating shaft. It is structured as follows.

Effect: With the above-described configuration, the coil end on the anti-compression element side becomes shorter in the radial direction of the rotating shaft, and the gap between it and the sealed container becomes wider. If this is ensured, the sealed container can be made smaller accordingly.

EXAMPLES Below, a compressor of the present invention will be described with reference to the drawings, but components that are the same as those of the prior art will be denoted by the same reference numerals and detailed explanations thereof will be omitted. FIG. 1 shows an embodiment of the invention. 9' and 10' are coil ends of the stator 6.

11 is the axis of the closed container. The coil ends 9' and 10' of the stator 6 are the lower coil ends on the anti-compression element side, and are arranged inside the inner diameter of the stator 6 within a range that does not interfere with the rotor 6 and at a distance from the rotating shaft 7. It is bent and molded in the direction in which it is inserted. Further, the rotating shaft 7 is provided with an opening hole for oil supply on the end surface on the side opposite to the compression element.

In the compressor configured as described above, since the compression element 3 has a longer radial length with respect to the axis of the rotating shaft 7, the rotating shaft 7 is placed at the center of the closed container 2, which is the same as the axial direction of the rotating shaft. The coil ends 9' and 10' on the anti-compression element side are provided to be shifted from the wire 12 toward the anti-compression element side, and the coil ends 9' and 10' on the anti-compression element side are located inside the inner diameter of the stator 5 compared to the coil end 11 on the compression element side of the electric element 4. It is bent and formed to shorten the length in the radial direction with respect to the axis of the rotating shaft 7. As a result, the anti-compression device 1111 is connected to the upper end of the radial outer circumference of the compression element 3 and the axis of the rotating shaft 7.
Since the shape of the closed container 2 determined by the outer circumferential diameter of the lower coil end 1o can be made into a spherical shape, the size can be reduced. In addition, by narrowing the distance between the coil ends 9', 10' and the rotating shaft 7, the oil on the lower surface of the sealed container 2 is less likely to be caught up in the rotating shaft 7 and scattered to the rotor 6. Therefore, it is possible to prevent oil from flowing into the air gap between the rotor 6 and the stator 5 and increasing the electrical input.

Effects of the Invention As described above, the present invention makes it possible to minimize the gap between the coil end of the electric element and the closed container by forming the coil end on the side of the counter-pressure mesh inside the inner diameter of the stator, so that the closed container has a spherical shape. This allows for miniaturization.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a hermetic electric compressor according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional hermetic electric compressor.

Claims (2)

[Claims] (1) Consisting of a compression element, an electric element, and a sealed container, one coil end of the stator winding of the electric element is molded inside the inner diameter of the stator, and the coil end is placed on the opposite side of the compression element. A hermetic electric compressor characterized by being arranged in a. (2) The hermetic electric compressor according to claim 1, wherein the hermetic container is spherical.