JP3326280B2 - Hermetic rotary compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic rotary compressor having a rotary compressor element and a motor element disposed in a casing, and more particularly to a motor element having a magnetized magnetic metal instead of a permanent magnet. Related to the rotor.

[0002]

2. Description of the Related Art In a conventional hermetic rotary compressor, an inner bottom portion of a casing is used as an oil reservoir, and a rotary compressor element having a cylinder chamber and rollers provided in the cylinder chamber is disposed in a lower portion of the casing. On the other hand, an electric motor element composed of a stator having at least two stator windings wound thereon and a rotor having permanent magnets embedded in a plurality of protrusions provided on the laminated core is arranged at the upper part. There is something like that.

[0003] In such a hermetic rotary compressor, the rotor of the rotary compressor element is eccentrically moved by the eccentric portion provided below the drive shaft of the rotor by rotating the rotor of the motor element. Like that. By eccentrically moving the rollers in this manner, the gas refrigerant is sucked and compressed in the cylinder chamber, and then discharged from the rotary compressor element, while the gas refrigerant is passed through the electric motor element and then provided at the upper part of the casing. From the discharge port to the external refrigeration circuit.

[0004]

However, in such a conventional hermetic rotary compressor, when a permanent magnet is embedded in the protrusion of the rotor, the magnetic force of the permanent magnet hinders the installation. There is a problem that installation work takes time.

Therefore, in order to solve such a problem, for example, after a non-magnetized magnetic metal is buried and installed in the protrusion of the rotor, the stator winding is energized to generate a magnetic flux in the stator winding. The magnetic flux is magnetized by the magnetic flux. However, when the magnetic metal is magnetized in this way, if the magnetic metal is not located at a position where the maximum magnetic flux generated in the stator winding passes, the magnetic force of the magnetized magnetic metal becomes small, so There is a problem in that the rotational torque of the child is insufficient, and the current value increases accordingly.

Accordingly, the present invention has been made to solve such a problem, and an object of the present invention is to provide a hermetic rotary compressor capable of magnetizing a magnetic metal with a desired magnitude of magnetic force. It is the purpose.

[0007]

According to a first aspect of the present invention, there is provided a rotary compressor element disposed at a lower part of a casing, and a stationary compressor disposed at an upper part of the casing and having at least two stator windings wound thereon. And a motor element comprising a rotor having a magnetic metal embedded in a plurality of protrusions provided on the laminated core, wherein the rotor is configured such that the rotor magnetizes the magnetic metal. When the winding is energized, the magnetic metal is incorporated into the stator such that the center of the magnetic metal is located at a position where the maximum amount of magnetic flux generated in the stator winding passes.

According to a second aspect of the present invention, there is provided a groove for incorporating the rotor at a position where the position at which the maximum magnetic flux amount passes and the center of the magnetic metal can be matched by matching at a predetermined phase angle. Are provided on the rotor and the stator, respectively.

According to a third aspect of the present invention, the rotor is provided with an oil separating plate above the oil separating plate, and the oil separating plate is provided with the groove for assembling, and when the magnet is magnetized, the oil separating plate cooperates with the groove. A stop groove for stopping rotation is formed.

[0010]

According to the first aspect of the present invention, a stator in which at least two stator windings are wound on an upper portion of a casing in which a rotary compressor element is disposed at a lower portion, and a plurality of protrusions provided on a laminated core are embedded. And a motor element comprising a rotor having a magnetic metal disposed therein. Then, when the stator winding is energized to magnetize the magnetic metal, the rotor is connected to the stator in such a way that the center of the magnetic metal is located at the position where the maximum magnetic flux generated in the stator winding passes. By incorporating the magnetic metal, a magnetic force of a desired magnitude can be magnetized on the magnetic metal.

According to the second aspect of the present invention, the position where the maximum amount of magnetic flux generated in the stator winding passes and the center of the magnetic metal are aligned by matching the grooves provided in the rotor and the stator at a predetermined phase angle. The rotor can be mounted at a position where it can be matched.

According to the third aspect of the present invention, the oil separating plate provided above the rotor is formed with a groove for installation and a stop groove, so that the groove for installation and the stop groove cooperate with each other. Thus, during magnetization, the rotation of the rotor can be stopped.

[0013]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view of a hermetic rotary compressor according to one embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a casing of the hermetic rotary compressor 2;
Is a bottomed case 1a provided with two gas refrigerant suction pipes 3 at the lower part of the side surface, and an upper lid case 1b provided with a gas refrigerant discharge pipe 4.
And more.

Here, the bottomed case 1a is
A is an oil reservoir, and two circular upper and lower cylinder chambers 5a and 5b are provided in the cylinder chambers 5a and 5b, and the phases of eccentric rotation along the inner walls of the cylinder chambers 5a and 5b are made different. Two rollers 6a, 6 provided
and a rotary compressor element 7 having a position b. The motor element 8 is arranged at the upper part.

The electric motor element 8 is formed by punching a silicon steel plate into a substantially annular shape, and laminating a thin steel plate having a slot formed on the inner periphery thereof.
In the present embodiment, the stator comprises a stator 9 on which three stator windings 10 are wound, and a rotor 11. The rotor 11 is embedded in a drive shaft 12, a laminated iron core 13 attached to the drive shaft 12 by shrink fitting, and a protrusion provided on the laminated iron core 13, and a stator winding of the stator 9 as described later. The magnetic metal 14 is magnetized by the magnetic flux from the wire 10 and becomes a permanent magnet.

Note that two eccentric portions 15a and 15b for eccentrically moving the two rollers 6a and 6b are provided vertically below the drive shaft 12 of the rotor 11.
The eccentric portions 15a and 15b rotate with the rotation of the drive shaft 12, and the rollers 6a and 6b eccentrically move along the inner walls of the cylinder chambers 5a and 5b by the rotation of the eccentric portions 15a and 15b. Has become.

When the rollers 6a and 6b eccentrically move, the gas refrigerant from the accumulator 16 passes through the gas refrigerant suction pipe 3 and the refrigerant suction passage 17 and is sucked and compressed in the cylinder chambers 5a and 5b. After that, the fluid is discharged from the rotary compressor element 7. Further, the gas refrigerant discharged from the rotary compressor element 7 passes through the electric motor element 8 as shown by an arrow, and is discharged from the gas refrigerant discharge pipe 4 to an external refrigeration circuit (not shown).

On the other hand, the laminated iron core 13 of the rotor 11 is formed with a refrigerant passage hole 18 penetrating vertically, and an oil separation space S is provided above the refrigerant passage hole 18 between the refrigerant passage hole 18 and the rotor 11. Are fixed to the laminated iron core 13 by rivets 20. Here, by providing the oil separation plate 19 above the refrigerant passage hole 18 in this manner,
The mist-like oil that has passed through the refrigerant passage hole 18 together with the gas refrigerant is separated from the gas refrigerant by the centrifugal force of the oil separating plate 19 that rotates together with the rotor 11, adheres to the inner surface of the casing 1, and returns to the inner bottom 1A. Have to be able to.

By separating the oil from the gas refrigerant by the oil separating plate 19 in this manner, the gas refrigerant containing the oil is prevented from flowing into the refrigeration circuit, thereby preventing the cooling efficiency from being lowered. Have to be able to. Further, by returning the oil to the inner bottom portion 1A, the shortage of the oil in the casing 1 can be prevented, so that the smooth operation of the rotary compressor element 7 and the electric motor element 8 can be prevented from being lost. ing.

Incidentally, a balance weight (not shown) for maintaining the balance with the eccentric portions 15a and 15b of the drive shaft 12 is formed on the oil separating plate 19, and the balance weight prevents the vibration of the drive shaft 12 during rotation. It can be eliminated. On the other hand, a groove for positioning (hereinafter referred to as a positioning groove) 21 is formed at the center of the balance weight as shown in FIG.

When the laminated iron core 13 is mounted on the drive shaft 12, the alignment groove 21 and the eccentric portions 15a, 15b of the drive shaft 12 are mounted in the same direction, so that the drive shaft is mounted. In this way, it is possible to more reliably prevent blurring during rotation of the twelfth wheel.

When the oil separating plate 19 is fixedly mounted on the laminated iron core 13, the positioning groove 21 is provided with two adjacent magnetic metals 14a, 14a, as shown in FIG.
14b, the groove 21
The figure shows the intermediate position between the magnetic metals 14a and 14b.

In FIG. 1, reference numeral 13a denotes a drive shaft insertion hole formed in the center of the laminated core, and 13b denotes a rivet insertion hole formed in the circumferential portion. Reference numeral 19a denotes a drive shaft insertion hole formed in the central portion of the oil separation plate 19, and 19b denotes a rivet insertion hole formed in a circumferential portion thereof. Reference numeral 22 denotes a disk-shaped side plate attached to the upper and lower surfaces of the laminated core 13 so that oil does not pass through a groove 13c formed in the outer peripheral portion of the laminated core 13. The side plate 22 has a drive shaft insertion hole at the center. 22a, a rivet insertion hole 22b and a communication hole 22c communicating with the refrigerant passage hole 18 of the laminated iron core 13 are formed in the circumference thereof.

By the way, as shown in the figure, for example, four embedded grooves 23 are formed in the laminated iron core 13, and the magnetic metal 14 is embedded in these embedded grooves 23. ing. Then, the magnetic metal 14 is
When the stator winding 10 of the stator 9 is energized after being embedded, the magnetic metal 14 is magnetized by the magnetic flux from the stator winding 10 to become a permanent magnet.

Here, the magnetic metal 14 embedded in the embedding groove 23 is located at a position where the maximum magnetic flux generated in the stator winding 10 passes through the center, that is, as shown in FIG. On the center line A between the junction U of the stator winding 10a on the inner periphery and the junction W of the stator winding 10b on the outer periphery of the stator winding 10, an intermediate portion between two adjacent magnetic metals 14a and 14b. When it is placed at a position where the numbers match, a desired magnetic force can be magnetized.

In order to enable the rotor 11 to be incorporated into the stator 9 in such a relationship, the stator 9 is positioned on the outer peripheral surface thereof at a position corresponding to the junction W of the outer stator winding 10b. Grooves (hereinafter referred to as positioning grooves)
23 are symmetrically formed at two places in the present embodiment. In this embodiment, the rotor 11 is not provided with a separate groove indicating the middle between two adjacent magnetic metals 14a and 14b, and uses the positioning groove 21 described above.

The rotor 11 is positioned so that the positioning groove 21 of the laminated core 13 is located at the center of the angle formed by the positioning groove 23 of the stator 9 and the junction U of the inner stator winding 10a. When incorporated in the stator 9, the maximum amount of magnetic flux generated in the stator winding 10 can be concentrated at the center of the magnetic metal 14.

In the present embodiment, the junction U of the stator winding 10a on the inner periphery is difficult to understand.
By aligning the positioning groove 21 with the positioning groove 23 of the stator 9 at a predetermined phase angle θ, the position where the maximum magnetic flux amount passes and the center of the magnetic metal 14 are matched.

When the magnetic metal 14 is magnetized into a permanent magnet as described above, if a magnetic flux is further passed through the magnetic metal 14 which is becoming a permanent magnet, a repulsive force is generated in the permanent magnet. This causes the rotor 11 to rotate.

Therefore, when the magnetic metal 14 is magnetized, it is necessary to fix the rotor 11 to the stator 9 so that the rotor 11 does not rotate. A stop groove 24 for mounting a jig is formed. The jig for stopping rotation is also mounted on the positioning groove 21, and the rotation of the rotor 11 is stopped in cooperation with the positioning groove 21 and the stopping groove 24. It has become.

As described above, when the stator winding 10 is energized, the rotor 11 is fixed in such a manner that the center of the magnetic metal 14 is located at a position where the maximum magnetic flux generated in the stator winding 10 passes. By assembling the magnetic element 14, a magnetic force of a desired magnitude can be magnetized on the magnetic metal 14.

Further, by aligning the positioning groove 21 of the laminated core 13 with the positioning groove 23 of the stator 9 at a predetermined phase angle θ, the position where the maximum magnetic flux amount passes and the magnetic metal 14
The rotor 11 can be incorporated into the stator 9 at a position where the center can be matched with the center of the rotor 9. Further, an alignment groove 21 and a stop groove 24 are formed in the oil separation plate 19, and the rotation of the rotor 11 can be stopped during magnetization by cooperation with the alignment groove 21 and the stop groove 24. .

[0034]

As described above, according to the present invention, when the stator winding is energized, the center of the magnetic metal is positioned at the position where the maximum magnetic flux generated in the stator winding passes. By incorporating the rotor into the stator, a magnetic force of a desired magnitude can be magnetized on the magnetic metal.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a hermetic rotary compressor according to one embodiment of the present invention.

FIG. 2 is an exploded perspective view of a motor element of the hermetic rotary compressor excluding a drive shaft of a rotor.

FIG. 3 is a plan sectional view of the electric motor element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Hermetic rotary compressor 7 Rotary compressor element 8 Motor element 9 Stator 10, 10a, 10b Stator winding 11 Rotor 13 Laminated core 14, 14a, 14b Magnetic metal 19 Oil separation plate 21 Alignment groove 24 Stop groove

──────────────────────────────────────────────────続 き Continuing on the front page (72) Tsutomu Kon, 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Arisa Sato 2-chome, Keihanhondori, Moriguchi-shi, Osaka No. 5 Inside Sanyo Electric Co., Ltd. (56) Reference Jikken Sho 49-21525 (JP, Y1) International Publication No. 92/7409 (WO, A1) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02K 7/14 F04C 29/00

Claims (3)

(57) [Claims] 1. A rotary compressor element disposed at a lower part of a casing, a stator disposed at an upper part of the casing and wound with at least two stator windings, and a plurality of protrusions provided on a laminated iron core. A motor element comprising a rotor having a magnetic metal embedded and disposed in a portion, wherein the rotor is configured such that when the stator winding is energized to magnetize the magnetic metal, the stator winding The hermetic rotary compressor is incorporated in the stator in such a manner that the center of the magnetic metal is located at a position where the maximum amount of magnetic flux generated in the wire passes. 2. A groove for incorporating the rotor at a position where the position at which the maximum magnetic flux amount passes and the center of the magnetic metal can be matched by matching at a predetermined phase angle. 2. The hermetic rotary compressor according to claim 1, wherein the hermetic rotary compressor is provided on each of the stator and the stator. 3. The rotor is provided with an oil separating plate above, and the oil separating plate is provided with the groove for assembling, and when magnetized, the rotation of the rotor is stopped in cooperation with the groove. 2. The hermetic rotary compressor according to claim 1, wherein a stop groove is formed.