JP2000287397A - Motor for compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply increase torque at a low cost by forming a skew to the surface side face of a rotor while forming a through-hole to the yoke section of the rotor. SOLUTION: Skews 34 are formed extending over the whole surface side face of a rotor 32, and through-holes 36 are formed symmetrically to the yoke section 35 of the rotor 32. The through-holes 36 function as flowing channels when a solvent at high pressure compressed by a compressive element is flowed to a discharge pipe. Magnetizing members composed of a rare earth metal or the like are buried into the through-holes 36, and the through-holes are magnetized after the assembly of a prime mover and can also be used as permanent magnets. Accordingly, when the permanent magnets are buried to the yoke section 35 and the skews 34 are formed to the surface of the rotor 32, the skews 34 and the action of the permanent magnets are involved, and revolving torque can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an electric motor used for a compressor.

[0002]

2. Description of the Related Art Today, air conditioners are widely used in homes and the like. Such an air conditioner compresses a refrigerant with a compressor, and a number of configurations such as a reciprocating compressor, a rotary compressor, and a scroll compressor have been proposed for the compressor.

However, there is no difference between these compressors in that the compression chamber is mechanically reduced by the power of an electric motor.

[0004] The electric motor is composed of a cylindrical stator fixed to a case and a rotor inserted into the stator. The rotor is rotated by receiving a magnetic force by a magnetic field generated by the stator. Has become.

At this time, a skew is provided on the inner surface of the stator or the front surface of the rotor to increase the rotational torque.

Whether to provide the skew on the stator side or the rotor side is a design matter that is appropriately selected.

[0007]

However, when a skew is provided on the inner surface of the stator, a large capital investment is required for the coil winding equipment constituting the stator, and the number of man-hours is increased, resulting in an increase in the number of motors. There has been a problem that the factors that lead to quality deterioration are included.

[0008] Skew is a necessary technical element in order to increase the rotational torque, but further development and the like have been required to respond to the recent demand for higher torque.

Accordingly, an object of the present invention is to provide a motor for a compressor capable of meeting the above-mentioned problems and demands.

[0010]

Means for Solving the Problems To solve the above problems, the invention according to claim 1 has a stator and a rotor rotatably provided with respect to the stator, and has a refrigerant. In the compressor motor, which serves as a power source for compressing the sucked refrigerant while suctioning air into the compression chamber, a skew is formed on the front surface of the rotor, and a through-hole is provided in the yoke portion thereof. Thus, high torque can be generated easily and inexpensively.

The invention according to claim 2 is characterized in that the skew angle of the through hole provided in the yoke portion is zero.

The invention according to claim 3 is characterized in that the skew and the skew angle of the through hole are formed so as to change from the middle.

The invention according to claim 4 is characterized in that the through hole is a hollow hole.

The invention according to claim 5 is characterized in that a magnetized member is embedded in the through hole.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram when an electric motor according to the present invention is applied to a rotary compressor. The rotary compressor has an electric motor 10 as a driving element and a compression element provided below the electric motor 10.

The compression element is urged by a cylinder 11 forming a compression chamber for sucking and compressing the refrigerant, a roller 12 disposed in the cylinder 11 and rotating, a high-pressure refrigerant, etc., and is ejected into the cylinder 11. And a main bearing 13 provided at an upper portion of the cylinder 11, a sub bearing 14 provided at a lower portion of the cylinder 11, and the like.

The rotating shaft 15 of the electric motor 10 is
And a cylinder 16 is provided with a crank 16 at the cylinder 11 portion.
2 is configured to perform eccentric rotational movement in the cylinder 11.

The rotating shaft 15 is supported by a main bearing 13 and a sub bearing 14. That is, the radial direction of the rotating shaft 15 is supported by the main bearing 13 and the sub-bearing 14,
The thrust direction is supported by the auxiliary bearing 14.
The main bearing 13 and the sub-bearing 14 allow the cylinder 11
The inside is closed to form a closed space.

Further, the inside of the rotary shaft 15 is formed hollow to provide an oil passage 17 and a crank 16.
An oil supply hole 18 penetrates in the radial direction of the rotating shaft 15 in the vicinity of the upper and lower ends.

The lower end of the oil passage 17 has a rotating shaft 15
A screw (not shown) fixed to the oil passage 17 is provided so that the screw sucks up the oil 20 stored in the bottom of the sealed case 19 into the oil passage 17 as the rotating shaft 15 rotates.

As a result, the oil passage 17 is filled with the oil 20, and the oil 20 flows out of the oil supply hole 18, whereby the sliding surface of the rotating shaft 15 and the main bearing 13 and the sliding surface of the rotating shaft 15 and the sub bearing 14 are formed. The sliding surface is lubricated.

Roller 12 disposed in cylinder 11
Is rotated by the rotation of a crank 16 disposed inside thereof, and rotates in contact with a vane urged inside the cylinder 11 by a high-pressure refrigerant or the like which is compressed and discharged. Therefore, the space formed by the roller 12 and the cylinder 11 is partitioned by the vane to form an intake chamber and a compression chamber (not shown).

The cylinder 11 is provided with an intake port 22 for communicating the intake pipe 21 with the intake chamber.
The refrigerant is sucked from outside the machine into the suction chamber through the outside.

The suction chamber becomes a compression chamber with the rotation of the roller 12, and the compression chamber is contracted to compress the refrigerant so that the discharge port 23, the discharge valve 24, the discharge muffler 2
After 5 and the like, it is discharged from the discharge pipe 26 to the outside of the machine.

The electric motor 10 has a cylindrical stator 31 fixed to the closed case 19 and a rotor 32 inserted in the stator 31, and the magnetic field generated by the stator 31 causes the rotor 32 to rotate. It is designed to rotate under magnetic force.

FIG. 2 is a perspective view of the rotor 32. The rotor 32 is a cylindrical member formed by laminating a plurality of donut-shaped silicon steel plates. The center hole forms a rotation shaft hole 33, and the rotation shaft 15 is inserted into and fixed to the rotation shaft hole 33. You.

The skew 3 is provided on the front surface of the rotor 32.
4 are formed to act to increase the rotational torque.

FIG. 2 shows only a part of the skew 34, and the skew 34 is actually formed over the entire front surface of the rotor.

Further, through-holes 36 are provided symmetrically in the yoke portion 35 of the rotor 32. The through hole 36 functions as a flow channel when the high-pressure refrigerant compressed by the compression element flows to the discharge pipe 26.

Of course, the through hole 36 is not used only as a flow channel for the refrigerant as described above, but can be used for various purposes depending on the situation.

For example, when the rotor 32 is formed by laminating a plurality of donut-shaped silicon steel plates, the rotor 32 may be used as a rivet insertion hole for fastening these.

It is also possible to embed a magnetized member made of a rare earth metal or the like in the through hole 36 and magnetize it after assembling the prime mover to form a permanent magnet.

As described above, since the permanent magnet is embedded in the yoke portion 35 and the skew 34 is formed on the front surface of the rotor 32, the action of the skew 34 and the action of the permanent magnet act synergistically to increase the rotational torque. And the cogging torque generated when only the skew 34 is provided can be suppressed.

In the above description, the skew angle θ of the skew 34 provided on the front surface of the rotor 32 is constant, and the skew angle of the through hole 36 is zero. The skew angle is not limited to this, but may be an irregular skew in which these skew angles are changed halfway as shown in FIG.

[0035]

As described above, according to the first aspect of the present invention, the skew is formed on the front surface of the rotor and the through-hole is provided in the yoke, so that it is simple and inexpensive. High torque can be generated.

According to the second aspect of the present invention, the skew angle of the through hole provided in the yoke portion is reduced to zero, so
In addition, high torque can be generated at low cost.

According to the third aspect of the present invention, since the skew and the skew angle of the through hole are formed so as to be changed in the middle, a high torque can be generated simply and inexpensively.

According to the fourth aspect of the present invention, since the through-hole is made hollow, the through-hole can be used as a refrigerant flow channel or the like.

According to the fifth aspect of the present invention, since the magnetized member is embedded in the through hole, high torque can be generated simply and at low cost.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a rotary compressor applied to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a rotor.

FIG. 3 is a diagram showing another configuration of the rotor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electric motor 15 Rotating shaft 31 Stator 32 Rotor 33 Rotating shaft hole 34 Skew 35 Yoke part 36 Through hole

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Keishiro Igarashi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 3H003 AA05 AB04 AC03 AD01 CE03 CF05 3H029 AA04 AA13 AA21 AB03 BB31 BB42 CC07 5H615 AA01 BB01 BB07 BB14 BB16 PP02 PP07 PP09 SS05 SS20 SS44 SS54 TT05 5H622 AA02 CA02 CA07 CA12 CB01 CB04 CB05 PP03 PP10 PP11 PP20 QA03 QB03

Claims (5)

[Claims] 1. A power source having a stator and a rotor rotatably provided with respect to the stator, for sucking refrigerant into a compression chamber and compressing the sucked refrigerant. A skew is formed on a front surface of the rotor, and a through-hole is provided in a yoke portion thereof. 2. The electric motor for a compressor according to claim 1, wherein a skew angle of a through hole provided in said yoke portion is zero. 3. The electric motor for a compressor according to claim 1, wherein the skew and the skew angle of the through hole are formed so as to change partway. 4. The electric motor for a compressor according to claim 1, wherein said through-hole is a hollow hole. 5. The compressor motor according to claim 1, wherein a magnetized member is embedded in the through hole.