JPS61129483A - Sealed type motor compressor - Google Patents

Abstract

PURPOSE:To expand a passage area of coolant without reducing contact area of a stator and a cylindrical sealing vessel by providing slits on the stator concentrically with the cylindrical sealing vessel. CONSTITUTION:Slits 8, 8 concentrically passing through a cylindrical sealing vessel 3 are provided on a stator of a rotary system sealing type compressor, and the slits 8, 8 are made passages of discharging coolant. And the stator 6 is injected into the cylindrical sealing vessel by shrinkage fit so that the entire outer periphery of the stator is contacted to the inner face of the sealing vessel 3 and it fixing force is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rotary hermetic electric compressor mainly used in refrigeration equipment.

Development of conventional examples and their problems Conventionally, as shown in FIGS. 2 and 3, rotary hermetic compressors operate inside a cylindrical hermetic container 3 provided with a refrigerant suction pipe 1 and a discharge pipe 2. A compression mechanism section 4 and an electric motor 5 for driving the compression mechanism section 4 are provided. This electric motor 5
is composed of a stator 6 and a rotor 7, and the stator 6 is provided with a notch 6a, forming a passage 6b with the cylindrical closed container 3.

Next, problems with such a conventional rotary compressor will be described.

By driving the electric motor 5, the compression mechanism section 4
sucks the refrigerant through the suction pipe 1, compresses it, and discharges it into the sealed container a. The discharged high-pressure refrigerant flows through a passage 6b opened by the sealed container 3 and the notch 6a of the stator 6.
It passes through the discharge pipe 2 and is pumped to the condenser (not shown) of the refrigeration cycle.

At this time, if the area of the passage 6b is small, it will create resistance when the refrigerant passes through it, reducing the efficiency of the compressor.

In order to prevent this decrease in the efficiency of the compressor, the area of the passage 6b may be increased, but in order to increase this area, it is necessary to cut out the notch 6a to a large extent. However, since the stator 6 is fixed to the airtight container 3 by shrink fitting or the like, if the notch 6a is made larger, the contact area between the stator 6 and the airtight container 3 becomes smaller, and the stator 6 is attached to the airtight container 3.
The fixing force to the stator 6 is weak, causing problems such as generation of noise and movement of the stator 6, and the reduction of the contact area, which inhibits the conduction of heat generated by the stator 6 to the closed container 3. It had the following drawbacks.

OBJECTS OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the conventional hermetic electric compressor mentioned above and provide a highly efficient compressor.

Structure of the Invention In order to achieve the above object, the present invention provides a hermetic electric compressor, in which a motor and a compression mechanism are provided inside a cylindrical hermetic container, and a #J electric motor stator is provided in the cylindrical hermetic container. are fixed by shrink fitting or the like, and the stator is provided with a slit concentric with the cylindrical sealed container.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. A compression mechanism section 4 is provided inside a cylindrical sealed container 3 provided with a refrigerant suction pipe 1 and a discharge pipe 2;
An electric motor 5 is provided to drive the . This electric motor 5 is composed of a stator 6 and a rotor 7, and the stator 6 is provided with two slits 8 that are concentric with the hermetic container 3.

By driving the electric motor 5, the compressor groove 4
sucks the refrigerant through the suction pipe 1, compresses it, and puts it into the airtight container 3.
Discharge into the inside of. The discharged high-pressure refrigerant is transferred to the stator 6
It passes through the IJ nozzle part 8 provided in the refrigeration cycle, passes through the discharge pipe 2, and is pumped to the condenser (not shown) of the refrigeration cycle.

At this time, the stator 6 is in contact with the cylindrical sealed container 3 over the entire circumference, so the stator 6 can be firmly fixed to the cylindrical sealed container 3, and the heat generated by the stator 6 is transferred to the cylindrical sealed container 3. 3 and the temperature rise of the stator 6 can be suppressed.

In this embodiment, there are two slits 8, but
This may be provided in any number of locations. Moreover, the slit of the present invention and the conventional notch may be used together.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, the refrigerant passage area can be expanded without reducing the contact area between the stator and the cylindrical closed container, and a highly efficient hermetic electric compressor can be realized. can be provided.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a hermetic electric compressor showing an embodiment of the present invention, Fig. 2 is a vertical sectional view showing an overview of a rotary hermetic electric compressor, and Fig. 3 is a conventional hermetic electric compressor. FIG. 3 is a cross-sectional view of the compressor. 3... Cylindrical sealed container, 4... Compression mechanism section, 5... Electric motor, 6... Stator,
7... Rotor, 8... Pickpocket, rF. Name of agent: Patent attorney Toshio Nakao and 1 other person @
Figure 1

Claims (1)

[Claims] A motor and a compression mechanism are provided inside a cylindrical sealed container, a stator of the motor is fixed to the cylindrical sealed container by shrink fitting, etc., and a slit concentric with the cylindrical sealed container is provided in the stator. A hermetic electric compressor with a section.