JP3249323B2 - Linear 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 linear compressor used for air conditioning and refrigeration, for example.

[0002]

2. Description of the Related Art A conventional linear (vibration type) compressor of this type is disclosed, for example, in Japanese Utility Model Publication No. 57-26061 (F04).
As shown in B35 / 04), a movable body (vibrator) composed of an electromagnet (drive coil) is provided in a magnetic field of a stator composed of a permanent magnet, and a piston and a spring are attached to the movable body, and the movable body is provided with an alternating member. Refrigerant is compressed by reciprocating a piston by an attraction / repulsion action between a permanent magnet and an electromagnet generated by passing an electric current and a compression / extension of a spring.

Further, as shown in Japanese Utility Model Publication No. Sho 63-2628 (F04B35 / 04), for example, an electromagnet is used on the stator side and a permanent magnet is used on the movable body side.

[0004]

However, in the former case, the magnetic field generated by using the electromagnet on the movable body side is small, so that it is difficult to increase the size, and the stability and durability reliability of the current collecting portion are low. There was a problem.

Further, in the latter case, since the lamination direction of the electromagnetic steel plates of the stator core constituting the stator is conventionally perpendicular to the direction of movement of the piston, the lamination direction of the electromagnetic steel plate is smaller than the inner diameter of the sealed container (sealed casing) of the compressor. For this reason, there is a problem that the thickness of the stator core is limited and it is difficult to satisfy a wide range of output. In some cases, a dedicated winding frame is required, and there is a problem that the number of parts increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem, and has as its object to provide a linear compressor capable of realizing stable operation with high efficiency over a wide range of output. And

[0007]

According to a first aspect of the present invention, there is provided a linear compressor in which an electric element and a compression element are housed in a closed container, and the electric element is fixed to a stator and a magnetic field generated in the stator. The compression element is composed of a cylinder and a piston attached to the vibrator, and the stator is laminated in the moving direction of the piston. And a coil wound around the stator core, permanent magnets having different polarities are arranged on the vibrator, and permanent magnets having different polarities are arranged opposite to each other. They are juxtaposed in the moving direction.

[0008] The linear compressor of the invention according to claim 2 is:
An electric element and a compression element are housed in a closed container, and the electric element is composed of a stator and a vibrator reciprocated by the action of a magnetic field generated by the stator and a permanent magnet. Is composed of a cylinder and a piston attached to the vibrator, and the stator is provided with a stator core made of a plurality of electromagnetic steel sheets laminated in the moving direction of the piston, and The coil generates a magnetic flux in a plane perpendicular to the direction of movement of the piston, and a permanent magnet having a different polarity is disposed on the vibrator so as to face the same. They are juxtaposed in the direction.

A third aspect of the present invention provides a linear compressor
An electric element and a compression element are housed in a closed container, and the electric element is composed of a stator and a vibrator reciprocated by the action of a magnetic field generated by the stator and a permanent magnet. Is composed of a cylinder and a piston attached to the vibrator, wherein the stator generates a magnetic flux in a plane perpendicular to the moving direction of the piston, and the vibrator has permanent magnets having different polarities. The magnets are arranged in parallel in the movement direction of the piston, and a plurality of permanent magnets are also arranged in the direction of the magnetic flux, the poles of the permanent magnets are opposed to each other, and a non-magnetic material is provided between them. The periphery is provided with a magnetic material.

[0010]

According to the linear compressor of the first aspect of the present invention, the stator of the electric element is wound around the stator core composed of a plurality of electromagnetic steel sheets stacked in the direction of movement of the piston. In addition, the permanent magnets with different polarities are arranged facing each other on the vibrator, and are arranged side by side in the moving direction of the piston, so that the thickness of the electromagnetic steel sheet of the stator core can be easily increased and decreased, A wide range of output can be supported. Further, various types of systems such as single-phase, two-phase, and three-phase can be supported by a combination of coils.

Further, according to the linear compressor of the second aspect of the present invention, in addition to this, the magnetic flux is generated in a plane orthogonal to the moving direction of the piston by the coil wound around the stator core. The magnetic flux generated from the coil easily reaches the vibrator, and the operating efficiency is improved.

According to the linear compressor of the third aspect of the present invention, the stator of the electric element generates magnetic flux in a plane perpendicular to the moving direction of the piston, and the vibrator has:
Permanent magnets having different polarities are arranged side by side in the movement direction of the piston, and a plurality of permanent magnets are also arranged in the direction of the magnetic flux, with the poles of the permanent magnets facing each other and a non-magnetic material provided between them. Since a magnetic material is provided on the inner peripheral portion of the vibrator, the vibrator moves to a side suitable for the magnetic flux generated in the stator to pass therethrough, and the magnetic flux is divided by the non-magnetic material to vibrate the vibrator. Pass through the magnetic material on the inner circumference.

[0013] Further, as described above, the magnetic flux generated from the coil also easily reaches the vibrator, so that the flow of the magnetic flux can be made effective and unnecessary, and the operation efficiency can be improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a longitudinal sectional side view of a linear compressor 1 of the present invention. An electric element 3 and a compression element 4 are housed in a sealed container 2 of the linear compressor 1, and the electric element 3 is composed of a stator 6, a vibrator 7 disposed inside the stator 6, and a spring member 8. 9, the compression element 4 is a cylinder 11 serving as a motor case to which the stator 6 is attached.
And a piston 12 which is freely inserted into the cylinder portion 11A of the cylinder 11 so as to reciprocate (vertically move).

A suction valve and a discharge valve (not shown) are mounted on the upper end of the cylinder portion 11A of the cylinder 11, and a suction muffler 13 and a discharge muffler 14 are mounted on the upper portion of the cylinder 11 in communication with the respective valves.

As shown in FIGS. 2 and 3, the stator 6 includes a stator core 17 composed of a plurality of donut-shaped electromagnetic steel plates 16 stacked in the moving direction (up and down direction) of the piston 12, and A plurality of (two or more) grooves 18 are formed in the inner peripheral portion of the electromagnetic steel plate 16. A coil 19 is wound around a groove insulating paper (not shown).

In this case, the coil 19 is wound so that the direction of the current is reversed (up and down) with respect to the diameter of the magnetic steel sheet 16 (horizontal direction in FIG. 3) as shown in FIG. Is equipped. Therefore, when a current is applied to the coil 19, the electromagnetic steel sheet 1 is attached to the stator 6 as shown in FIG.
A magnetic flux passing through the center of the stator 6 is generated, and in the figure, the right half tooth portion of the inner circumference of the stator 6 is magnetized to the N pole and the left half is magnetized to the S pole. Of course, when the direction of the current is reversed, it is needless to say that the magnetization is reversed.

Next, the vibrator 7 includes an outermost cylindrical nonmagnetic material (such as plastic or stainless steel) 21, nonmagnetic materials 22 covering the upper and lower ends thereof, and an innermost cylindrical nonmagnetic material. Body 23, a cylindrical magnetic body 24 provided outside the nonmagnetic body 23, and four semicircular permanent magnets 26 to 29 inserted between the magnetic body 24 and the nonmagnetic body 21.
The piston 12 is fixed inside the innermost non-magnetic member 23. The vibrator 7 including the piston 12 is inserted concentrically with the center of the electromagnetic steel plate 16 of the stator 6. As a result, the magnetic flux of the stator 6 is generated in a plane (horizontal plane) in a direction crossing the vibrator 7 including the piston 12 in the horizontal direction, and is actually orthogonal to the moving direction (up and down direction) of the piston 12.

On the other hand, the permanent magnets 26 and 27 are
The permanent magnets 28 and 29 are provided at the lower part of the upper part of the piston 12, whereby the permanent magnets 26 and 28, 27 and 29 are arranged side by side in the moving direction (up and down direction) of the piston 12.
The permanent magnets 26 and 27 and 28 and 29 are juxtaposed in the direction of the magnetic flux crossing the vibrator 7. Further, the permanent magnets 26 and 27 are opposite poles (the N pole of the permanent magnet 26 and the permanent magnet 27
S-pole) are opposed to each other, and a non-magnetic material 31,
The permanent magnets 28 and 29 also have opposing poles (the S pole of the permanent magnet 28 and the N pole of the permanent magnet 29), and the non-magnetic members 31, 31 are provided between the poles. Have been.

The permanent magnets 26 and 28 and the permanent magnets 27 and 29 have different polarities, and a non-magnetic member 32 is provided between the permanent magnets as shown in FIG. In FIGS. 2 and 4, the non-magnetic member 32 is inserted between the upper and lower magnetic members 24. However, as shown in FIG.
It may be up to the outside of 4. However, the structure of FIG. 4 has higher efficiency. Further, the non-magnetic material 23 on the inner periphery is for preventing magnetization of the piston 12, and is not necessary when the piston 12 is a non-magnetic material.

A frame 34 is attached to the lower end of the stator 6, and an upper sub-bearing 36 is attached to the upper surface of the frame 34 so as to face below the cylinder portion 11A and face upward. The lower part of the piston 36 is supported by the auxiliary bearing 36 so as to be vertically movable, and an oil pump 37 is mounted in the lower part of the piston 36.

The spring members 8, 9 are coil springs. The spring member 8 is provided between the cylinder 11 and the upper surface of the vibrator 7, and the spring member 9 is provided between the frame 34 and the lower surface of the vibrator 7. In the non-energized state, the vibrator 7 is held at the vertical center of the stator 6, that is, at the center of the reciprocating motion of the piston 12. Thereby, the operation of the piston 12 is smoothed. Incidentally, the spring members 8 and 9 may be constituted by so-called Oxford leaf springs.

When an alternating current flows through the coil 19 in the above configuration, the vibrator moves from right to left (FIG. 6) in a plane perpendicular to the moving direction of the piston 12 as described above, for example, by a current in the direction shown in FIG. 7 is generated. Vibrator 7
The spring member 8 is extended and the spring member 9 is compressed so as to move downward so that the permanent magnets 26 and 27 through which the magnetic flux easily passes face the stator 6 (FIG. 8). When the direction of the current is reversed, the permanent magnets 28 and 29 are reversed.
The piston 12 moves upward so as to face the piston 11, thereby causing the piston 12 to reciprocate (vertically move) in the cylinder portion 11 </ b> A.
Will do. By the reciprocating motion of the piston 12,
Refrigerant and air are sucked from the suction valve via the suction muffler 13, compressed, and discharged to the discharge muffler 14 from the discharge valve.

At this time, the magnetic flux generated by the coil 19 of the stator 6 is generated in a plane perpendicular to the moving direction of the piston 12, so that the magnetic flux easily reaches the vibrator 7 and the operating efficiency is improved. In particular, since the non-magnetic material 31 or 32 is provided between the horizontal permanent magnets 26 and 27 and 28 and 29, and the vertical permanent magnets 26 and 28 and 27 and 29, the magnetic flux there is Be divided. Therefore, the magnetic flux generated by the coil 19 passes through the magnetic body 24 on the inner periphery of the vibrator 7 as shown in FIG. Therefore, the flow of magnetic flux can be made effective and wasteless, and the operation efficiency can be further improved.

The magnetic steel plates 16 of the stator core 17
Are stacked in the moving direction of the piston 12, so that the thickness of the electromagnetic steel plates 16 can easily be increased or decreased, and a wide range of output can be handled. Further, various types of systems such as single-phase, two-phase, and three-phase can be used by combining the coils 19.

In the above embodiment, the permanent magnet 2 of the vibrator 7 is used.
6 to 27 are arc-shaped, but the invention is not limited thereto. As shown in FIG. 9, the vibrator 7 is composed of a plurality of electromagnetic steel plates 7A stacked in the moving direction of the piston 12, and a slot is formed therein. Each permanent magnet is replaced by a rectangular plate-like permanent magnet (for example, 2
6A, 26B, 27A, 27B) and inserted into each slot. According to such a configuration, the manufacturing cost of the permanent magnet can be reduced. However, the polarity of each permanent magnet is the same as described above, and the permanent magnets 26A, 27A
The nonmagnetic members 31, 31 are provided between the gaps 26B, 27B except for the inner peripheral portion of the electromagnetic steel sheet 7A.

Further, the permanent magnets 26 to 29 may be formed in an arc shape composed of a polyhedron as shown in FIG. Also in this case, the manufacturing cost of the permanent magnet can be reduced.

Further, in the embodiment, the number of poles of the stator 6 is two, but may be three or more. The number of the permanent magnets in the horizontal direction of the vibrator 7 is also two. It may be constituted by.

[0029]

According to the first aspect of the present invention, the stator of the electric element is wound around the stator core composed of a plurality of electromagnetic steel sheets stacked in the moving direction of the piston. The permanent magnets with different polarities are arranged facing each other on the vibrator and are arranged side by side in the moving direction of the piston, making it easy to increase and decrease the thickness of the electromagnetic steel sheet of the stator core. Output can be supported. Further, various types of systems such as single-phase, two-phase, and three-phase can be supported by a combination of coils.

Further, according to the second aspect of the present invention, in addition to the above, the magnetic flux is generated in a plane orthogonal to the moving direction of the piston by the coil wound on the stator core, so that the magnetic flux is generated from the coil. The generated magnetic flux easily reaches the vibrator, and the operating efficiency is improved.

According to the third aspect of the present invention, a magnetic flux is generated in a plane orthogonal to the moving direction of the piston by the stator of the electric element, and the vibrator is provided with permanent magnets having different polarities in the moving direction of the piston. And a plurality of permanent magnets are also arranged in the direction of the magnetic flux, and a non-magnetic material is provided between the permanent magnets with the poles of the permanent magnets facing each other. Is provided, so that the vibrator moves to a side suitable for the magnetic flux generated in the stator to pass therethrough, and the magnetic flux is separated by a non-magnetic material so as to pass through the magnetic material on the inner circumference of the vibrator. Become.

Further, as described above, the magnetic flux generated from the coil also easily reaches the vibrator, so that the flow of the magnetic flux can be made effective and unnecessary, and the operation efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a linear compressor of the present invention.

FIG. 2 is an enlarged vertical sectional side view of an electric element of the linear compressor of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 3;

FIG. 4 is an enlarged view of a portion C in FIG. 3;

FIG. 5 is a diagram showing another structure corresponding to FIG. 4;

FIG. 6 is a plan sectional view of an electric element showing a state of generation of a magnetic flux.

FIG. 7 is a plan sectional view of the electric element showing a state of magnetic flux during operation.

FIG. 8 is an enlarged vertical sectional side view of an electric element showing an operation of a piston during operation.

FIG. 9 is a plan sectional view of an electric element showing another embodiment of the present invention.

FIG. 10 is an enlarged plan sectional view of a part of a vibrator showing still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Linear compressor 2 Airtight container 3 Electric element 4 Compression element 6 Stator 7 Vibrator 11 Cylinder 12 Piston 16 Magnetic steel plate 17 Stator iron core 19 Coil 24 Magnetic body 26-29 Permanent magnet 31, 32 Non-magnetic body

────────────────────────────────────────────────── ─── Continuing on the front page (72) Katsuyuki Takeda 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Hiroshi Takagi 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Inside Sanyo Electric Co., Ltd. (56) References Jiyo Sho 62-31780 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04B 35/04

Claims (3)

(57) [Claims] An electric element and a compression element are housed in a closed container, and the electric element is composed of a stator and a vibrator reciprocated by the action of a magnetic field generated by the stator and a permanent magnet. And a compression element comprising: a cylinder;
In a linear compressor comprising a piston attached to the vibrator, the stator is wound around a stator core made of a plurality of electromagnetic steel sheets stacked in a moving direction of the piston, and the stator core. And a permanent magnet having different polarities is arranged opposite to the vibrator and arranged in parallel in the moving direction of the piston. 2. An electric element and a compression element are housed in a closed container, and the electric element is composed of a stator and a vibrator reciprocated by the action of a magnetic field generated by the stator and a permanent magnet. And a compression element comprising: a cylinder;
In a linear compressor comprising a piston attached to the vibrator, the stator is wound around a stator core made of a plurality of electromagnetic steel sheets stacked in a moving direction of the piston, and the stator core. A magnetic flux is generated in a plane perpendicular to the moving direction of the piston by the coil , and permanent magnets having different polarities are arranged on the vibrator in opposition to each other, and the moving direction of the piston is A linear compressor characterized by being installed side by side. 3. A motor-driven element and a compression element are housed in a closed container, and the motor-driven element is composed of a stator and a vibrator reciprocated by the action of a magnetic field generated by the stator and a permanent magnet. And a compression element comprising: a cylinder;
A linear compressor comprising a piston attached to the vibrator, wherein the stator generates a magnetic flux in a plane perpendicular to the moving direction of the piston, and the vibrator includes permanent magnets having different polarities. A plurality of permanent magnets are arranged side by side in the direction of movement of the piston, and a plurality of permanent magnets are also arranged in the direction of the magnetic flux. A linear compressor characterized by providing a magnetic material on the periphery.