KR19980013865A - Motors for refrigerator compressors with improved insulation - Google Patents

Abstract

The present invention relates to a motor for a refrigerator compressor having improved insulation which improves an insulation structure of a stator constituting a motor unit in a hermetic compressor of a refrigerator having means for sucking and discharging a refrigerant into a sealed can.

The motor for a refrigerator compressor with improved insulation according to the present invention is constituted by a rotor 22 and a stator 21 installed in a compressor 10 in a refrigerator and a slit 21b on the stator 21 is provided with an inter- And the auxiliary coil 25. The interphase insulating paper 33 can be easily and easily formed by the bumps B whose stem portions 23a are formed parallel to the both sides of the main coil 24 and the auxiliary coils 25, And is inserted into the slat 21b, and the main coil 24 or the auxiliary coil 25 is sufficiently wrapped and insulated by the bent portion.

Accordingly, the present invention improves insulation between the phases of the stator constituting the motor in the hermetically sealed compressor for a refrigerator, thereby improving the insulation between the main coil 24 and the auxiliary coil 25 and preventing the reliability and life of the motor from being degraded It is effective.

Description

Motors for refrigerator compressors with improved insulation

1 is an exemplary view showing the internal structure of a hermetic compressor;

Fig. 2 (a) is a perspective view of the stator of Fig. 1, and Fig. 2 (b) is a developed view of the inter-phase insulating paper of Fig.

3 (a) and 3 (b) are exploded views and cross-sectional views, respectively, of the inter-phase insulating paper of the present invention.

FIG. 4 is an exemplary view showing a mounting state of FIG. 3; FIG.

Description of the Related Art [0002]

10: compressor 11: sealed can

12: Eccentric shaft 13: Cylinder (conventional)

14: piston (conventional) 21: stator

21a: stator core 21b: slat

22: rotor 23: inter-phase insulating paper (conventional)

23a, 33a: stem portion 24: main coil

25: auxiliary coil 33: inter-phase insulating paper (present invention)

B: Groove

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor, and more particularly, to a compressor of a refrigerator having a means for sucking and discharging a refrigerant into an airtight can, an insulated refrigerator compressor Motor.

BACKGROUND ART [0002] In a refrigerator, a compressor is a means for converting a rotational force due to electrical energy into a mechanical energy of reciprocating motion, and a refrigerant having a low boiling point passes through the compressor to a high pressure (about 12 atmospheres). The high-pressure refrigerant is cooled in the condenser to be in a liquid state. When the liquid refrigerant is vaporized in the cooler, one refrigeration cycle is completed.

FIG. 1 shows an example of an internal structure of a hermetic compressor.

The compressor 10 has a structure in which a suction pipe (not shown) and a discharge pipe 16 of a refrigerant are connected to the outside of the sealed can 11 and a high-pressure generating means is mounted inside. The high pressure generating means can be divided into a cylinder 13, a piston 14, a valve 15, and the like, and is connected to a motor portion provided at the lower portion thereof by an eccentric shaft 12.

In operation, the rotation or eccentric shaft 12 by the motor induces cam movement of the eccentric cam at its upper portion, and the cam movement again reciprocates the piston 14 in the cylinder 13 through the connecting rod, (15) is opened and closed by the pressure difference between both sides formed at this time to move the refrigerant in one direction.

For reference, the refrigerant introduced through the suction pipe flows into the cylinder 13 through the suction muffler after being filled in the sealed can 11, and the refrigerant compressed in the cylinder 13 passes through the discharge muffler 16 and is discharged And sent to a condenser (not shown) through a pipe. The suction muffler and the exhaust muffler 16 serve to reduce the compressor noise that occupies most of the refrigerator operating noise.

At this time, a single-phase induction motor is usually used for the refrigerator in order to provide the electric energy to sustain the flow of the refrigerant in the refrigeration cycle. Fig. 1 shows the arrangement of the stator 21 and the rotor 22 of the induction motor. In particular, in the winding process of the stator 21, which is a stator, the insulated process is insufficient and there is a lot of defects.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a hermetic compressor of a refrigerator having a means for sucking and discharging a refrigerant into a sealed can, And to provide a motor.

In order to achieve the above object, the present invention provides a refrigerator comprising a rotor (22) and a stator (21) installed in a compressor (10), and a slit (21b) on the stator (21) In the motor having the main coil 24 and the auxiliary coil 25 which are insulated from each other, the interphase insulating paper 33 is easily bent (bent) by the bumps B whose stem portions 23a are formed in parallel on both sides And inserted into the slat 21b, and the main coil 24 or the auxiliary coil 25 is sufficiently wrapped and insulated by the bent portion to insulate the motor for the refrigerator compressor.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 (a) is a perspective view of the stator of Fig. 1, and Fig. 2 (b) is a developed view of insulating paper between phases .

The stator 21 has a stator core 21a in which a plurality of (for example 24) slats 21b are formed by punching a plurality of piles of a silicon steel sheet, and the main and auxiliary coils 24, (25) is wound in a round shape. The main coil 24 and the auxiliary coil 25 are also called operation windings and starting windings, respectively, and the motor is switched from the auxiliary coil 25 to the main coil 24 and operated by automatic speed sensing means (for example, centrifugal force switch) .

The main coil 24 and the auxiliary coil 25 are wound after inserting insulating paper (not shown) made of a predetermined insulating material (for example, polyester) into the slit 21b. The main coil 24, Phase insulating paper 23 is inserted between the auxiliary coils 25 and the auxiliary coils 25 to maintain the insulation between the operating winding and the starting winding.

The inter-phase insulating paper 23 having the upper and lower insulating portions and the stem portion 23a is formed by inserting the main coil 24 into the slit 21b and then inserting a stem portion 23a ) Is inserted into the slats 21b to insulate it. At this time, the interphase insulating paper 23 made of polyester does not pass through the slats 21b, and insulation can not be maintained.

When the width of the stem portion 23a is narrowed so that the phase insulating paper 23 passes through the slat 21b as shown in FIG. 2 (a), the main coil 24 and the auxiliary coils 25 And the motor may be severely damaged in some cases.

FIG. 3 (a) is a developed view for the inter-phase insulating paper of the present invention, and FIG. 3 (b) is a sectional view taken along line X-X of FIG.

The interphase insulating paper 33 of the present invention is made of a polyester material and the stem portion 33a is formed in a manner that the width of the stem portion 23a is narrowed so that the conventional interphase insulating paper 23 passes through the slat 21b well. To both sides. And a groove portion B is formed parallel to both sides of the widened portion.

At this time, as indicated by a dotted line in the drawing, the groove portion B is formed throughout the plugging of the stem portion 33a. The groove portion B is a portion that is made thinner by compressing the polyester material and is the portion that is most easily bent out of the stem portion 33a of the inter-phase insulating paper 33.

Alternatively, the groove portion B of the inter-phase insulating paper 33 may be cut at a predetermined depth or at predetermined intervals instead of being formed by pressing. As another modified embodiment, it is also possible to form the substrate in a bent state by local heating. In any case, the groove B is most easily bent out of the stem portion 33a of the inter-phase insulating paper 33.

FIG. 4 is an exemplary view showing the mounting state of FIG.

The interval between the grooves B of the interphase insulating paper 33 is formed to be similar to the size of the inlet portion of the slats 21b as shown by the dashed line in the drawing, Minimize distortion.

With this structure, when inserting the inter-phase insulating paper 33 and the auxiliary coil 25 in a state where the operator inserts the main coil 24 into the slat 21b in the process of assembling the compressor motor for a refrigerator, The main coil 24 and the auxiliary coil 25 are sufficiently wrapped and insulated while the grooves B of the main coil 24 and the auxiliary coil 25 are bent.

As described above, according to the present invention, the inter-phase insulating paper of the stator constituting the motor is improved in the hermetic compressor for a refrigerator having the means for sucking and discharging the refrigerant into the sealed can, whereby the insulating property between the main coil 24 and the auxiliary coil 25 is improved And the reliability and life of the motor can be prevented from lowering.

Although the present invention has been shown and described with respect to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as set forth in the following claims Those skilled in the art will readily know what is known in the art.

Claims (1)

And a rotor 22 and a stator 21 provided inside the compressor 10 in the refrigerator. A main coil 24 and an auxiliary coil 24, which are insulated with an insulating paper between phases, are disposed inside the slats 21b on the stator 21, (25), comprising: The interstage insulation paper 33 is easily bent by the groove portion B formed in parallel with the stem portion 23a and inserted into the slat 21b, (24) or the auxiliary coil (25) are sufficiently wrapped and insulated from each other.