JPH08200212A - Linear compressor - Google Patents

Abstract

PURPOSE: To provide a linear compressor capable of realizing a highly efficient and stable action to the output of a vast range. CONSTITUTION: An electrically driven element 3 and a compression element 4 are stored inside a closed container 2 of a linear compressor 1 and the electrically driven element 3 is composed of a stator 6 and a trembler 7, which makes a reciprocating motion by the behavior of a magnetic field produced by the stator 6 and permanent magnets 26 to 29, while the compression element 4 is composed of a cylinder 11 and a piston 12, which is fitted to the trembler 7. The stator 6 is composed of a stator iron core 17, which is composed of a plurality of sheets of electro-magnetic steel plates 16 laminated in the moving direction of the piston 12, and a coil 19 wound around the stator iron core 17, while the trembler 7 has provided thereon in parallel permanent magnets 26, 28 and 27, 29 of different polarity in the moving direction of the piston 12.

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 freezing, 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).
B35 / 04), a movable body (vibrator) composed of an electromagnet (driving coil) is provided in the magnetic field of a stator composed of a permanent magnet, and a piston and a spring are attached to this movable body, and the movable body is alternately arranged. The refrigerant is compressed by causing the piston to reciprocate by the attraction / repulsion action of the permanent magnet and the electromagnet caused by passing an electric current and the compression / extension of the spring.

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

[0004]

However, in the former case, the magnetic field generated by the electromagnet on the movable body side is small, making it 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 stacking direction of the magnetic steel sheets of the stator core constituting the stator has been perpendicular to the moving direction of the piston in the conventional case, it is different from the inner diameter of the closed container (closed casing) of the compressor. As a result, there is a problem that the laminated thickness of the stator core is limited and it is difficult to satisfy a wide range of output. Then, in some cases, a dedicated reel is required, which causes a problem of increasing the number of parts.

The present invention has been made to solve the above-mentioned conventional technical problems, and an object of the present invention is to provide a linear compressor capable of realizing highly efficient and stable operation over a wide range of outputs. And

[0007]

A linear compressor according to a first aspect of the present invention houses an electric element and a compression element in a closed container, and the electric element is a permanent magnet and a magnetic field generated in the stator. A vibrator is reciprocated by the action of a magnet, and a compression element is composed of a cylinder and a piston attached to the vibrator, and a stator is laminated in the moving direction of the piston. A stator core made of a plurality of electromagnetic steel plates and a coil wound around the stator core, and permanent magnets having different polarities are arranged in parallel in the moving direction of the piston on the vibrator. It is a thing.

The linear compressor according to the invention of claim 2 is
The electric element and the compression element are housed in a closed container, and the electric element is composed of a stator and an oscillator reciprocated by the action of a magnetic field generated in the stator and a permanent magnet. Is composed of a cylinder and a piston attached to a vibrator, and a stator is composed of a plurality of electromagnetic steel plates laminated in the moving direction of the piston, and a stator core and a stator core. It is composed of a wound coil, and this coil generates magnetic flux in a plane orthogonal to the moving direction of the piston, and the vibrator has permanent magnets of different polarities arranged in parallel in the moving direction of the piston. Is.

According to the linear compressor of the invention of claim 3,
The electric element and the compression element are housed in a closed container, and the electric element is composed of a stator and an oscillator reciprocated by the action of a magnetic field generated in the stator and a permanent magnet. Is composed of a cylinder and a piston attached to a vibrator, and a magnetic flux is generated by a stator in a plane perpendicular to the moving direction of the piston, and the vibrator has permanent magnets of different polarities. The magnets are arranged side by side in the moving direction of the piston, 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. A magnetic material is provided on the peripheral portion.

[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 plates laminated in the moving direction of the piston. In addition to being composed of a coil and a permanent magnet with different polarities arranged side by side in the moving direction of the piston, it is easy to increase or decrease the thickness of the electromagnetic steel plate of the stator core and support a wide range of output. It will be possible. Also, by combining the coils, various types such as single phase, two phase, and three phase can be supported.

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

According to the linear compressor of the invention of claim 3, magnetic flux is generated in the plane orthogonal to the moving direction of the piston by the stator of the electric element, and the vibrator is
Permanent magnets having different polarities are arranged in parallel in the moving direction of the piston, a plurality of permanent magnets are also arranged in the direction of the magnetic flux, and the poles of each permanent magnet are opposed to each other to provide a non-magnetic body between them. Since the magnetic body is provided on the inner peripheral portion of the vibrator, the vibrator moves to a side suitable for passing the magnetic flux generated in the stator, and the magnetic flux is divided by the non-magnetic body to form the vibrator. It comes to pass through the inner magnetic body.

Further, like the above, the magnetic flux generated from the coil can easily reach the vibrator, so that the flow of the magnetic flux can be made effective and there is no waste, and the operating efficiency can be improved.

[0014]

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

A suction valve and a discharge valve (not shown) are attached to the upper end of the cylinder portion 11A of the cylinder 11, and a suction muffler 13 and a discharge muffler 14 are attached to the upper portion of the cylinder 11 so as to communicate 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 each of them. A plurality of (two or more) grooves 18 are formed on the inner peripheral portion of the electromagnetic steel sheet 16 ... And a coil 19 wound via groove insulating paper (not shown).

In this case, the coil 19 is wound such that, when a current is applied to it, the direction of the current is reversed (up and down) with the diameter (horizontal direction in FIG. 3) of the electromagnetic steel plate 16 as a boundary. It is equipped. Therefore, when a current is applied to the coil 19, the stator 6 has the electromagnetic steel plate 1 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. Needless to say, when the direction of the current is reversed, it is magnetized to have the opposite polarity.

Next, the vibrator 7 has a cylindrical outermost cylindrical non-magnetic material (plastic or stainless steel, etc.) 21, non-magnetic materials 22, 22 covering the upper and lower ends thereof, and an innermost cylindrical non-magnetic material. The body 23, the cylindrical magnetic body 24 provided outside the non-magnetic body 23, and the four semi-circular permanent magnets 26 to 29 inserted between the magnetic body 24 and the non-magnetic body 21.
The piston 12 is fixed inside the non-magnetic body 23 at the innermost circumference. 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 direction transverse to the vibrator 7 including the piston 12 in the horizontal direction, and actually in a plane (horizontal plane) orthogonal to the moving direction (vertical direction) of the piston 12.

On the other hand, the permanent magnets 26 and 27 are the vibrator 7
, The permanent magnets 28 and 29 are provided in the lower part, so that 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, and
The permanent magnets 26 and 27, 28 and 29 are arranged in parallel in the direction of the magnetic flux that crosses the vibrator 7. Further, the permanent magnets 26 and 27 have opposite poles (the north pole of the permanent magnet 26 and the permanent magnet 27).
Of the non-magnetic body 31,
31 is provided, the opposite poles of the permanent magnets 28 and 29 (the S pole of the permanent magnet 28 and the N pole of the permanent magnet 29) are opposed to each other, and the non-magnetic bodies 31 and 31 are also provided between the poles. Has been.

Further, the permanent magnets 26 and 28 and the permanent magnets 27 and 29 have different polarities, and a non-magnetic material 32 is also provided between them as shown in FIG. 2 and 4, the non-magnetic member 32 is inserted between the upper and lower magnetic members 24, 24, but as shown in FIG.
It may be up to the outside of 4. However, the structure of FIG. 4 is more efficient. Further, the non-magnetic body 23 on the inner circumference is for preventing the magnetization of the piston 12, and is unnecessary when the piston 12 is a non-magnetic body.

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

The spring members 8 and 9 are coil springs, the spring member 8 is interposed between the cylinder 11 and the upper surface of the vibrator 7, and the spring member 9 is interposed between the frame 34 and the lower surface of the vibrator 7. It is provided and holds the vibrator 7 in the vertical center of the stator 6, that is, the center of the reciprocating motion of the piston 12, in a non-energized state. This facilitates the operation of the piston 12. The spring members 8 and 9 may be so-called Oxford leaf springs.

With the above construction, when an alternating current is passed through the coil 19, for example, the current in the direction shown in FIG. 6 causes the vibrator to move from right to left (FIG. 6) in the plane orthogonal to the moving direction of the piston 12 as described above. A magnetic flux crossing 7 is generated. Oscillator 7
Expands the spring member 8 and compresses the spring member 9 so that the permanent magnets 26 and 27 through which the magnetic flux passes easily face the stator 6 (FIG. 8). Then, if the direction of the electric current is reversed, the permanent magnets 28 and 29 will be replaced by the stator 6
Since the piston 12 moves upward so as to be opposed to, the piston 12 reciprocally vibrates (moves up and down) in the cylinder portion 11A.
Will be done. By the reciprocating motion of this 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, since the magnetic flux generated by the coil 19 of the stator 6 is generated in the plane orthogonal to the moving direction of the piston 12, 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, 28 and 29 and the vertical permanent magnets 26 and 28, 27 and 29, the magnetic flux is generated there. Divided. Therefore, the magnetic flux generated by the coil 19 passes through the inside of the magnetic body 24 of the vibrator 7 as shown in FIG. Therefore, the flow of the magnetic flux can be made effective and wasteless, and the operating efficiency can be further improved.

Further, the magnetic steel plates 16 of the stator core 17 ...
Is laminated in the moving direction of the piston 12, it is easy to increase or decrease the laminated thickness of the electromagnetic steel plates 16 ,. Furthermore, by combining the coils 19, various systems such as single phase, two phase, and three phase can be supported.

In the above embodiment, the permanent magnet 2 of the vibrator 7 is used.
Although 6 to 27 are formed in an arc shape, the invention is not limited thereto, and as shown in FIG. 9, the vibrator 7 is composed of a plurality of electromagnetic steel plates 7A laminated in the moving direction of the piston 12 to form slots therein, Each permanent magnet is a rectangular plate-shaped permanent magnet (for example, 2
6A, 26B, 27A, 27B) to be inserted into each slot. With this configuration, the manufacturing cost of the permanent magnet can be reduced. However, the polarities of the permanent magnets are the same as described above, and the permanent magnets 26A, 27A
, 26B and 27B, the non-magnetic material 31, 31 is provided while leaving the inner peripheral portion of the electromagnetic steel sheet 7A.

Further, the permanent magnets 26 to 29 may have 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, although the stator 6 has two poles in the embodiment, it may have three or more poles, and the vibrator 7 has two permanent magnets in the horizontal direction, but three or more poles are provided. It may be configured with.

[0029]

According to the first aspect of the present invention, the stator of the electric element is wound around the stator core made of a plurality of electromagnetic steel plates laminated in the moving direction of the piston. In addition to being composed of a coil, the vibrator has permanent magnets of different polarities arranged side by side in the moving direction of the piston.
This makes it easy to increase or decrease the product thickness of the electromagnetic steel plates of the stator core, and it is possible to support a wide range of output. Also, by combining the coils, various types such as single phase, two phase, and three phase can be supported.

Further, according to the invention of claim 2, in addition to this, the magnetic flux is generated in the plane orthogonal to the moving direction of the piston by the coil wound around 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 invention of claim 3, magnetic flux is generated in the plane orthogonal to the moving direction of the piston by the stator of the electric element, and permanent magnets having different polarities are provided in the vibrator in the moving direction of the piston. And a plurality of permanent magnets arranged in the direction of the magnetic flux, the poles of each permanent magnet are opposed to each other, and a non-magnetic material is provided between them. Since the oscillator is provided, the oscillator moves to the side suitable for passing the magnetic flux generated in the stator, and the magnetic flux is divided by the non-magnetic body and passes through the magnetic body inside the oscillator. Become.

Further, like the above description, the magnetic flux generated from the coil can easily reach the vibrator, so that the flow of the magnetic flux can be made effective and there is no waste, and the operating efficiency can be improved.

[Brief description of drawings]

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

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

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

FIG. 4 is an enlarged view of portion C in FIG.

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

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

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

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

FIG. 9 is a plan sectional view of an electric element according to 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]

 1 Linear Compressor 2 Airtight Container 3 Electric Element 4 Compression Element 6 Stator 7 Transducer 11 Cylinder 12 Piston 16 Electromagnetic Steel Plate 17 Stator Iron Core 19 Coil 24 Magnetic Material 26-29 Permanent Magnet 31, 32 Non-Magnetic Material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuyuki Takeda 2-5-5 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Inventor Hiroshi Takagi 2-5 Keihan Hondori, Moriguchi City, Osaka Prefecture No. 5 Sanyo Electric Co., Ltd.

Claims (3)

[Claims] 1. 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 in the stator and a permanent magnet. With the configuration, the compression element is a cylinder,
In a linear compressor composed of a piston attached to the vibrator, the stator is wound around the stator core made of a plurality of electromagnetic steel plates laminated in a moving direction of the piston, and the stator core. And a permanent magnet having different polarities, which are arranged in parallel with each other 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 in the stator and a permanent magnet. With the configuration, the compression element is a cylinder,
In a linear compressor composed of a piston attached to the vibrator, the stator is wound around the stator core made of a plurality of electromagnetic steel plates laminated in a moving direction of the piston, and the stator core. And a magnetic flux is generated in a plane orthogonal to the moving direction of the piston by the coil, and permanent magnets having different polarities are arranged in parallel in the moving direction of the piston on the vibrator. Is a linear compressor. 3. An electric element and a compression element are housed in a closed container, and the electric element is composed of a stator and an oscillator reciprocated by the action of a magnetic field generated in the stator and a permanent magnet. With the configuration, the compression element is a cylinder,
In a linear compressor configured with a piston attached to the vibrator, a magnetic flux is generated in a plane orthogonal to the moving direction of the piston by the stator, and the vibrator is provided with permanent magnets having different polarities. A plurality of permanent magnets are arranged side by side in the moving direction of the piston, and a plurality of permanent magnets are also arranged in the direction of the magnetic flux. A linear compressor characterized in that a magnetic material is provided on the periphery.