TWI383563B - A linear motor applied to compressor - Google Patents

Description

Linear motor for compressor

The invention relates to motors, and more particularly to a linear motor for use in a compressor.

At present, small and medium-sized, domestic refrigerating and air-conditioning equipment, such as refrigerators or air-conditioners, are still mainly reciprocating compressors, and the power source in the compressor is a rotary motor, and then through the crank slider mechanism, or The cam mechanism converts the rotary motion of the rotary motor into a linear motion. In the case of the crank slider mechanism, the crank portion is rotated by the rotary motor, and the slider is used as the piston portion of the reciprocating compressor. In other words, the rotary motor drives the cam to rotate, and the cam then pushes the top piston to move forward and backward. Both of these mechanisms convert rotary motion into linear motion, but the disadvantage is that these mechanisms have many movable components, which undoubtedly increase the cost, and the components themselves have a limited life limit, which increases the difficulty of maintenance. In addition, these movable elements also have frictional forces with each other, and these frictional forces cause energy loss, which detracts from the power transmitted by the motor and reduces the efficiency of the compressor.

In order to omit the above-described rotary/linear motion conversion mechanism, a concept of replacing a rotary motor with a linear motor has been proposed, so that the motion of the motor itself is linear without requiring an additional mechanism to convert the rotational motion into a linear motion. It can be seen that the use of a linear motor can eliminate the cost, maintenance and wear of the rotary/linear motion conversion mechanism.

One of the conventional techniques is U.S. Patent No. 6,184,597, however, the disadvantage is that the size of the mover is too large.

Another conventional technique is U.S. Patent No. 6,946,754, in which the coil of the stator is wound with the moving axis of the mover as the center of the circle, and the mover is placed entirely in the stator coil, so that the steel piece is surrounded by the mover. Arranged, and the plane of the silicon steel sheet is parallel to the moving axis of the mover, and if the stator steel sheet is aligned with the line of sight parallel to the moving axis of the mover, it can be seen that the silicon steel sheet is radially surrounded by the mover. And arranged. The disadvantage of this technique is that the silicon steel sheets are radially arranged, so that the larger the gap between the steel sheets facing the outside of the stator, the lower the electromagnetic efficiency. In order to avoid the unevenness of the gap between the steel sheets, it is necessary to pay more attention when arranging the steel sheets, or to use other components to maintain the uniformity of the above gaps, which in turn increases the cost.

Another conventional technique is U.S. Patent No. 5,945,748. The structure of the mover is as described in the above-mentioned U.S. Patent No. 6,184,597, which is bulky, and the structure of the stator is as in the above-mentioned US6946754. The moving axis of the mover is radially centered. Arranged, so there are problems as mentioned above.

As can be seen from the above various conventional techniques, the concept of a linear motor is very desirable, but the solutions of various conventional technologies are not perfect, so a new thinking is required to make the linear motor more perfect.

In order to achieve the above object, the present invention provides a linear motor applied to a compressor, comprising a mover having an axis, and the magnetic lines of force of the mover are flat with a radial direction along the axis And two stators located beside the mover, each stator having two magnetic pole combinations, the first magnetic pole combination comprising a first pole and a second pole of the same polarity; the second magnetic pole combination comprising the first magnetic pole combination a first pole and a second pole of different polarities; wherein a reciprocating direction of the mover is parallel to an axial direction of the axial center, and a direction of stacking the magnetic conductive material of the magnetic pole assembly is parallel to an axial direction of the axial center .

A linear motor as described above, wherein the stator has a plurality of magnetic pole combinations.

A linear motor as described above, wherein the number of the stators is two or more.

A linear motor as described above, wherein the magnetic pole is combined with two magnetic poles formed by winding a coil, and the two magnetic poles are arranged along the circumference of the axial center and are spaced by one hundred and eighty degrees.

A linear motor as described above, in which four of the magnetic poles are combined, and the four magnetic pole combinations are arranged along the circumference of the axial center, and the adjacent ones are spaced by ninety degrees.

The linear motor as described above, wherein the stator has two, each of the stators having the magnetic pole combination is formed by laminating a plurality of annular magnetic sheets.

A linear motor as described above, wherein each of the annular magnetic sheets has a plurality of winding portions for winding the wires to form the first and second poles.

A linear motor as described above, in which the winding directions of two adjacent winding portions are opposite.

The linear motor as described above, wherein the mover also has a plurality of magnetic pole combinations, the number of which is the same as the magnetic pole combination of the stator, and the magnetic pole combination of each mover is arranged according to the circumference of the axial center, and adjacent movers Magnetic field direction of one of the magnetic pole combinations In the case of the centrifugal direction, the direction of the magnetic field line of the other is the centripetal direction.

A linear motor as described above, wherein the pole assembly of the mover is made of a permanent magnet.

In order to achieve the above object, the present invention provides a linear motor applied to a compressor, comprising a mover having a direction of motion and forming a magnetic line of force perpendicular to the direction of motion; and a stator having a first winding The wire combination is combined with a second winding, and each has a winding portion, wherein adjacent winding portions of different combinations have opposite magnetic lines of force, and the overlapping direction of the combined steel sheets of the windings is parallel to the moving direction .

a linear motor as described above, wherein the magnetic lines of force on the mover have a complex array disposed about the direction of movement, and the magnetic directions of adjacent sets of magnetic lines of force are opposite; and the plurality of winding portions are located at each The inside of the winding combination is adjacent to the mover.

In the linear motor as described above, in the plurality of winding portions in each of the winding combinations, all of the winding portions are wound by the same wire, and the winding directions of the adjacent two winding portions are opposite.

A linear motor as described above, wherein the silicon steel sheet is annular and extends in the inner circumference to form a plurality of the winding portions.

What the present invention is intended to provide is a linear motor for use in a compressor to solve the shortcomings of the prior art.

Please refer to FIG. 1, which is a side cross-sectional view of an embodiment of the present invention. The compressor 1 disclosed therein has a casing 10 and a cylinder chamber 12, and the cylinder chamber 12 is also connected to an intake port 12a and an exhaust port 12b. The piston 30 is located in the cylinder chamber 12 for compressing the gas therein (usually a refrigerant), and the uncompressed gas enters the cylinder chamber 12 from the intake port 12a, and is compressed by the piston 30 and then discharged from the cylinder through the exhaust port 12b. Room 12. Since the present invention is a linear motor, the piston 30 is actually directly fixed to the mover 3. The structure of the mover 3 is substantially a shaft 32, at one end of the shaft 32 is the piston 30, and the other end It is a spring 4 for providing a restoring force and limiting the movement of the mover 3 to a certain extent. Again, the direction of movement of the mover 3 is the axial direction 31, which generally overlaps the geometrical axial direction of the shaft 32. A plurality of mover steel sheets 36 are superposed on the mover 3 along the axial direction 31, and a mover magnet 34 (usually a permanent magnet) is jacketed on the mover steel sheet 36.

Referring to FIG. 1 , a space surrounding the mover in the casing 10 fixes a first stator 21 and a second stator 22 on the first stator 21 near the mover 3 (ie, The winding portion 20 of 2 is wound with the first stator coil 210, and the portion of the second stator 22 close to the mover 3 (ie, the winding portion 20 of FIG. 2) is wound with the second stator coil 220. When the stator coils are energized, a magnetic field is generated. In the first stator 21 and the second stator 22 of the upper half of the mover 3, since the first stator coil 210 and the second stator coil 220 are wound in opposite directions, When energized, the polarity above the first stator 21 is the N pole and the lower side is the S pole; conversely, the polarity above the second stator 22 is the S pole and the lower side is the N pole. The outer side of the mover 3 is an N pole, so it is repelled with the second stator 22 and sucks with the first stator 21. Therefore, the mover 3 moves to the left of the plane of FIG. 1 and pushes the piston 30 to compress cold. coal. On the other hand, if AC power is used, when the current direction is exchanged next time, the lower side of the first stator 21 becomes the N pole, and the lower side of the second stator 22 becomes the S pole. The sub 3 is mutually exclusive with the first stator 21 and sucks with the second stator 22, and the mover 3 moves to the right. It can also be seen that a first stator coil 210 and a second stator coil 220 can each form a magnetic pole combination.

Please refer to FIG. 2 , which is a front view of the stator and the mover of the present invention. Wherein the first and second stators (21, 22) and the mover 3 themselves are observed in the axial direction 31 of the mover 3, wherein each stator is actually formed by stacking a plurality of silicon steel sheets, and the inner diameter sleeve is On the outer diameter of the mover 3, each of the stators (21, 22) has a winding portion 20, and for the distribution of the average magnetic force, there are usually four winding portions 20, in terms of the first stator 21, Each of the winding portions 20 is wound with a first stator first coil 210a, a first stator second coil 210b, a first stator third coil 210c, and a first stator fourth coil 210d. Similarly, each of the winding portions 20 of the second stator 22 is also wound with a second stator first coil 220a, a second stator second coil 220b, a second stator third coil 220c, and a second stator fourth coil 220d. The adjacent two winding portions 20 are at an angle of ninety degrees, and the winding directions of the coils thereon are opposite, as viewed from the center of the stator toward the winding portion 20, if the first stator first coil 210a is wound clockwise, The first stator second coil 210b is wound counterclockwise. Therefore, the winding directions of the first and third coils are clockwise, and the winding directions of the second and fourth coils are counterclockwise. Furthermore, the winding of each coil of course has a winding axial direction which is exactly the radial direction of the stator. Moreover, when energized, the coils wound in the same direction have the same magnetic field lines, so in the first stator 21, the magnetic directions of the first and third coils are from the inside to the outside, and the second and fourth numbers are The magnetic direction of the coil is the same from the outside to the inside; similarly, as shown in FIG. 1 and its description, the first stator first coil 210a and the second stator first line The ring 220a needs to have the opposite polarity when energized. Therefore, if the second stator first coil 220a is wound counterclockwise, the second stator second coil 220b is wound clockwise. Therefore, in the second stator 22, the magnetic directions of the first and third coils are the same from the outside to the inside, and the magnetic directions of the second and fourth coils are from the inside to the outside.

Referring to FIG. 2, the shaft 32 of the mover 3 is jacketed with a stack of mover steel sheets 36, and the mover steel sheet 36 is jacketed with a mover magnet 34. Moreover, the mover magnet 34 of the mover 3 can also be equally divided into four parts, wherein the magnetic lines of the upper and lower parts are from the inside to the outside, that is, the outer side of the upper and lower parts is the N pole, the inner side is the S pole; and the left and right parts are The magnetic lines of force are from the outside to the inside, that is, the outer sides of the left and right parts are the S pole and the inner side is the N pole. That is, the magnetic lines of force in the mover magnet 34 are parallel to the radial direction of the mover 3.

In summary, the arrangement of the lines of magnetic force on each of the winding portions 20 or the mover 3 must change the direction of movement of the mover 3 when the current is exchanged, which is a suitable setting.

Therefore, the invention can increase the volume of the mover through the innovative winding method and the arrangement and shape of the silicon steel sheet, and the stator steel sheet does not have a gap, which can increase the density of the magnetic lines. Therefore, the invention can not only reduce the volume of the linear motor, but also improve the efficiency of the motor, thereby improving the efficiency of the compressor.

Those who are familiar with the art in this case are all modified by the ingenuity, and are not protected as intended by the scope of the patent application.

1‧‧‧Compressor

10‧‧‧shell

12‧‧‧Cylinder room

12a‧‧‧air inlet

12b‧‧‧Exhaust port

20‧‧‧Winding Department

21‧‧‧First Stator

210‧‧‧First stator coil

210a‧‧‧First Stator No.1 Coil

210b‧‧‧First Stator No. 2 Coil

210c‧‧‧First Stator No.3 Coil

210d‧‧‧First Stator No.4 Coil

22‧‧‧second stator

220‧‧‧second stator coil

220a‧‧‧Second stator first coil

220b‧‧‧Second stator second coil

220c‧‧‧Second stator three coil

220d‧‧‧Second stator four coil

3‧‧‧ mover

31‧‧‧Moving direction, axial direction

32‧‧‧ shaft

34‧‧‧ mover magnet

36‧‧‧ mover steel sheet

4‧‧‧ Spring

1 is a side cross-sectional view showing an embodiment of the present invention; and FIG. 2 is a front elevational view showing a stator and a mover of the present invention.

1‧‧‧Compressor

10‧‧‧shell

12‧‧‧ cylinder

12a‧‧‧air inlet

12b‧‧‧Exhaust port

21‧‧‧First Stator

210‧‧‧First stator coil

22‧‧‧second stator

220‧‧‧second stator coil

3‧‧‧ mover

31‧‧‧Moving direction, axial direction

32‧‧‧ shaft

34‧‧‧ mover magnet

36‧‧‧ mover steel sheet

4‧‧‧ Spring

30‧‧‧Piston

Claims (21)

A linear motor applied to a compressor includes: a mover having an axial center, and a magnetic line of the mover is parallel to a radial direction along the axis; and a stator having a magnetic pole combination, the magnetic pole combination being further a first pole and a second pole having opposite polarities; wherein a direction of reciprocation of the mover is parallel to an axial direction of the axial center, and a direction of stacking the magnetic conductive material of the magnetic pole assembly and an axial direction of the axial center parallel. The linear motor of claim 1, wherein the stator has a plurality of magnetic pole combinations. The linear motor of claim 2, wherein the magnetic pole combination has two, and the two magnetic pole combinations are arranged along the circumference of the axial center and are spaced by one hundred and eighty degrees. The linear motor of claim 2, wherein the magnetic pole combination has four, and the four magnetic pole combinations are arranged along the circumference of the axial center, and the adjacent ones are spaced ninety degrees apart. The linear motor of claim 1, wherein the stator has two stators, and the magnetic pole combination on each of the stators is formed by laminating a plurality of annular magnetic sheets. The linear motor of claim 5, wherein each of the annular magnetic sheets has a plurality of winding portions for winding the wires to form the first and second poles. The linear motor of claim 6, wherein the winding directions of the two adjacent winding portions are opposite. The linear motor of claim 1, wherein the mover also has a plurality of magnetic pole combinations, the number of which is the same as the magnetic pole combination of the stator, and the magnetic pole combination of each mover is set according to the circumference of the axial center. And adjacent ones of the mover magnetic poles If the direction of the magnetic field line is the centrifugal direction, the direction of the magnetic field line of the other is the centripetal direction. The linear motor of claim 8, wherein the magnetic pole combination of the mover is made of a permanent magnet. A linear motor applied to a compressor, comprising: a mover having a direction of motion and forming a magnetic field line perpendicular to the direction of motion; and a stator having a first winding combination and a second winding Combining, and the first winding combination and the second winding combination each have a winding portion, wherein adjacent winding portions of different combinations have opposite magnetic field lines, and the overlapping directions of the combined steel sheets of the windings Parallel to the direction of motion. The linear motor of claim 10, wherein: the magnetic lines of force on the mover have a complex array disposed about the direction of movement, and magnetic directions of adjacent sets of magnetic lines of force are opposite; and the winding portion There are a plurality of them, and they are located on the inner side of each winding combination and are adjacent to the mover. The linear motor of claim 10, wherein among the plurality of winding portions in each of the winding combinations, all the winding portions are wound by the same wire, and the adjacent two winding portions are The winding direction is reversed. The linear motor of claim 10, wherein the silicon steel sheet is annular and extends in the inner circumference to form a plurality of the winding portions. The linear motor of claim 10, wherein when the stator is energized, the first stator coil is attracted to the mover to bring the mover toward the first stator coil, and the second The stator coil repels the mover, causing the mover to move away from the second stator coil to approach the first stator coil, causing the mover to move in a straight line. The linear motor of claim 10, wherein the stator is plural. The linear motor of claim 10, wherein the first winding combination and the second winding combination are plural. The linear motor of claim 10, wherein the winding portion has a plurality of winding portions, and each of the winding portions is disposed around the mover. The linear motor of claim 10, wherein each of the windings has four winding portions, and the four winding portions are arranged along a circumference formed by the moving direction, and the adjacent two The winding portions have an interval of ninety degrees with respect to the moving direction, and the winding directions of the adjacent two winding portions are opposite. The linear motor of claim 10, wherein the stator is plural. The linear motor of claim 10, wherein the mover also has a plurality of magnetic lines of force, the number of the plurality of lines of magnetic force being the same as the number of winding portions of the first stator coil or the second stator coil, and If one of the two adjacent magnetic lines of force has a direction of centrifugation, the direction of the magnetic line of the other is a centripetal direction. The linear motor of claim 10, wherein the magnetic lines of force of the mover are formed by permanent magnets.