JPS59153987A - Vibro-compressor - Google Patents

Abstract

PURPOSE:To eliminate necessity for use of any covering to enclose the casing by allowing a pair of pistons to reciprocate in the opposite directions in the casing, and thereby canceling the vibrations produced by these reciprocative motions of the pistons. CONSTITUTION:A pair of pistons 2, 3 are reciprocated in the opposite directions by actuating a switch 133 to apply alternate current to a pair of drive coils 4, 5, and thus a fluid begins the intake/discharge action. Here the motions of these pistons 2, 3 are made in the opposite directions to each other to cause canceling of the vibrations produced. Accordingly the vibration applied to the casing 1 will be quite mild to provide possibility of eliminating the use of any covering to be used otherwise for the purpose of preventing conduction of the vibration of casing 1 to the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a drive coil energized by alternating power is arranged in the gap between a permanent magnet and a pole piece, and a piston integrated with the coil is slidably loose in a cylinder part. The present invention relates to a vibratory compressor in which fluid is sucked and discharged by the reciprocating movement of the piston, in which the reciprocating movement caused by the magnetic force of the drive coil is amplified by a resonant coil spring.

Conventionally, in this type of vibratory compressor, a single vibrating system consisting of a permanent magnet, a pole piece, a drive coil, a piston, a resonant coil spring, etc. is entirely disposed within a casing to constitute a compressor body. Therefore, as a reaction to the reciprocating movement of the piston along the axial direction of the casing, it is unavoidable that vibrations occur in the compressor main body along the axial direction. The container is supported by, for example, an electric refrigerator, which inevitably increases the size of the entire compressor. Furthermore, since the compressor body is covered with a container, the efficiency of cooling the heat generated inside the compressor body is poor. In order to further increase the capacity, it is necessary to increase the weight of vibrating bodies such as resonant coil springs and pistons to increase the vibration energy, so the strength of each member must be improved to withstand the increased vibration energy. There is a need. In particular, in a resonant coil spring, in order to maintain a constant resonant frequency, it is necessary to suppress the spring constant to a large stress, and there is a limit to the increase in capacity due to the life of the spring itself.

The first object of the present invention is to solve all of these conventional technical problems, and to cover the casing by configuring a pair of vibration systems that vibrate in opposite directions within the casing to prevent vibration of the casing. It is an object of the present invention to provide a vibratory compressor which can omit a container, improve cooling efficiency, have a smaller overall size, and whose capacity can be easily increased.

A second object of the present invention is to provide a structure in which both cylinder portions are provided in the axial center of the casing, and a discharge valve chamber is formed between the two cylinder portions via a discharge valve. An object of the present invention is to provide a simplified vibratory compressor.

A third object of the present invention is to provide a vibratory compressor whose structure is simplified by simplifying the electrical connection of the drive coil.

In the vibratory compressor according to the first invention, a pair of permanent magnets and a pair of pole pieces each forming an annular gap between the permanent magnets are housed in a cylindrical casing with both ends closed. , fixedly provided symmetrically with respect to the axial center portion of the casing, a pair of drive coils in which a pair of pistons are individually integrated and are energized by alternating power are disposed in each of the gaps, A pair of cylinder parts into which the piston is slidably and loosely fitted are integrally provided in the casing, and the two pairs of drive coils and the piston are floatingly supported by a resonant coil spring so as to be movable in the axial direction of the casing. The winding direction of each of the drive coils, the manner of electrical connection between each of the drive coils, and the direction of the magnetizing force of each of the permanent magnets are selected such that the directions of movement of both of the drive coils are opposite to each other.

In the vibratory compressor according to the second aspect of the invention, a pair of cylinder portions into which a pair of pistons are slidably and loosely fitted are provided in the partition member 5 and /U for partitioning the inside of the casing, respectively, with the same axis. In addition, in the vibratory compressor according to the third invention, in which a common discharge valve chamber is formed between both cylinder parts via a pair of discharge valves, each drive coil is electrically connected in series. Either the winding directions are the same and the magnetic poles on the sides facing the corresponding drive coils of the permanent magnets are mutually opposite, or the winding directions of each drive coil are mutually reversed and the magnetic poles are opposite to the drive coils of the respective permanent magnets. The magnetic poles on both sides are the same.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. First, in FIG. A pair of pistons 2.3 are arranged symmetrically with respect to the central part of the direction, and these pistons 2.3 each drive a corresponding drive coil 4.5.
By supplying alternating power to the refrigerant, they reciprocate in opposite directions, and the fluid trace draws in and discharges refrigerant.

The casing 1 includes a pair of closing members 7 at both ends of the cylindrical body 6.
The two closing members 7 and 8, which are constructed by fitting and fixing the two closing members 7 and 8, are basically cylindrical and have a radially outwardly projecting collar portion 9.1 (l) at each end. These flanges 9.10 are fitted and fixed to both ends of the cylindrical body 60. That is, thin-walled portions 11.12 are provided at both ends of the cylindrical body 60, and the aforementioned thin-walled portions 11.12 are provided at both ends of the cylindrical body 60. The flanges 9.10 of each closing member 7.8 are fitted into the thin wall portion 1.
1.By caulking and bending 12 as shown,
A casing 1 is constructed. In addition, as described above, all of the caulked portions are in contact with each other, so that the fixation between the closing member 7.8 and the cylindrical body 6 is further ensured.

In this way, closing members 7 of the same shape are attached to both ends of the cylindrical body 6.
Since the casing 1 is constructed by fitting and bonding the parts 8 to 8, the structure of the casing 1 is extremely simplified and the assembly efficiency is improved.

In the axially central part of the casing 1, a partition member 13, which is basically a thick disk, is fixed to the inner surface of the cylindrical body 6, so that the inside of the casing 1 is divided into a pair of low pressure chambers 14.1.
It is divided into 5.

In both low pressure chambers 14.15, permanent magnets 16.1γ are each fixed in a ring shape on the inner surface of the cylindrical body 60 near both ends. In addition, permanent magnets 16.
Annular gaps 1B and 19'z are formed between the pole pieces 17 and the ring-shaped pole pieces 20 and 21 are respectively fixed or integrally molded. Each gap 18,19 has a drive coil 4
．． 5 are respectively disposed so as to be able to reciprocate in the axial direction of the casing 1. These drive coils 4.5 are connected to the support member 22
．． 23 respectively, and each support part month 22.2
3 is a cylindrical piston 2.3 concentric with the axis of the casing 1;
Both are fixed.

One support member 22 includes a base 24 that is basically disk-shaped and is fixed to the piston 2, and a plurality of bases 24 that are fixed to the peripheral edge of the base 240 at intervals in the circumferential direction and extend parallel to the axis of the piston 2. each support part 25
A drive coil 4 is wound around one end. The other support member 23 has a base portion 26 and a support portion 27 and is formed in the same manner as the one support member 22. The drive coil 5 is wound around one end of the support portion 27, and the base portion 26 is connected to the piston 3. It can be firmly attached to. In this way, each drive coil 4.5 and its corresponding piston 2.3 are substantially integrated.

At the other end of the support portion 25.27 of each support member 22.23, a blade plate 28.29 is provided at right angles to the moving direction of one drive coil 4.5.

These blade plates 28,29 serve to scatter all the lubricating oil into each low pressure chamber 14,15 when the drive coil 4.5 and the piston 2.3 integral therewith reciprocate.

On the inner end surfaces of the closing members 7.8 at both ends of the casing 1, receiving plates 33, 34 made of an electrically conductive material are abutted, respectively, through insulating plates 31, 32 made of an electrically insulating material. ′! f, the surface of the base 24.26 of each supporting member 22.23 facing the blocking part 7.8 is provided with an electrically conductive plate 35.36 made of an electrically insulating material. The plates 37 and 38 are brought into contact with the receivers.Resonant coil springs 39 and 40 are interposed between the plates 33, 37 and 34, 38 of the receivers that face each other.

On the surface of the base 24.26 of the support member 22.23 facing the partition member 13, there is a support plate 43.4 made of an electrically conductive material via an insulating plate 41.42 made of an electrically insulating material.
4 are brought into contact with each other, and receiving plates 47 and 48 made of a conductive material are brought into contact with both surfaces of the partition member 13, respectively, through insulating plates 45 and 46 made of an electrically insulating material. Resonant coil springs 49.50 are interposed between plates 43.47 and 44.48 of the mutually opposing supports.

In this way, the reciprocating motion of the drive coil 4 is amplified by the pair of resonant coil springs 39,49, and the reciprocating motion of the drive coil 5 is amplified by the pair of resonant coil springs 40,50.
is amplified by The pistons 2.3, which perform an amplified reciprocating motion together with each drive coil 4.5, are slidably fitted into cylinder portions 51.52 integrally provided with the partition member 13, respectively.

Referring also to FIG. 2, a through hole 53 concentric with the casing 1 is bored in the partition part 13, and a pair of cylindrical cylinder bodies 54 and 55 are inserted into the through hole 53 from both ends thereof.
By fitting, both low pressure chambers 14 of the partition part 13 are closed.
Portions VC/cylinder portions 51 and 52 facing 15 are each integrally provided. That is, in the middle of the through hole 53,
Two undercut step portions 56 and 57 are formed facing outward on both sides in the axial direction, and these step portions 5
6.57, for example, metal flow materials such as lead and copper 58.
59 and the cylindrical 7-ring body 54.55 is inserted into the through hole 5.
3 is suppressed and inserted. This increases the metal flow rate by 58%.
．． 59 is the step part 56.57 and each cylinder body 54.5.
The metal flow material 58, 59 flows between the outer circumferential surface of the cylinder body 54, 55 and the inner circumferential surface of the through hole 13 and becomes fixed. and/or functions are performed.

On the outer periphery of the mutually opposite ends of the cylinder body 54,55,
Annular notches 60 and 61 are respectively formed between the cylinder bodies 54 and 55, and both ends are connected to the notches 60.
．． A substantially cylindrical liner 62 is inserted into each of the liners 61 . In this way, a discharge valve chamber 63 is formed between the ends of both cylinder bodies 54,55, which is common to both cylinder parts 51,52.

This discharge valve chamber 63 includes a pair of discharge valves 66.6 which can be respectively seated on valve seats 64.65 formed on the end face of each cylinder body 54.55 and are guided by the liner 62.
7 and both discharge valves 66.67 interposed between them.
A pressing coil spring 68 that biases toward the valve seats 64 and 65 corresponding to the valve seats 67' is housed.

In the discharge valve chamber 63, each discharge valve 66.67 is activated by a biasing coil spring 68 when the corresponding piston 2.3 moves outward in the cylinder chamber 69.70 of the cylinder part 51.52 to perform a suction operation. When the piston 2.3 seats on the valve seat 64.65 and closes the valve due to the spring force of the piston 2.3, the piston 2.3 moves inward within the cylinder chamber 69 and performs a discharge operation. The valve seat 64.65 resists the spring force of the spring 68.
The cylinder chambers 69 and 70 are opened and the cylinder chambers 69 and 70 are communicated with the discharge valve chamber 63.

On the other hand, the piston 2.3 in each cylinder chamber 69.70
A bottomed cylindrical holding member 73.74 having a communication hole 71.72 at the bottom forms a suction valve chamber 75.76 between the tip of each piston 2.3 and is fixed to the tip of each piston 2.3. be done. In these suction valve chambers 75.76, suction valves 79.80 that can be seated on valve seats 77.7B formed on the tip surface of each piston 2.3 are movable in the axial direction of the pistons 2.3. Each is retained.

In each suction valve chamber 75.76, when the piston 2.3 moves outward in the cylinder chamber 69.70 to perform a suction operation, the suction valve 79.80 separates from the valve seat 77.78 and the piston 2.3 The interior of the piston 2.3 communicates with the suction valve chamber 75.76, and thus the interior of the piston 2.3 with the cylinder chamber 69.70 via the suction valve chamber 75.76 and the communication hole 71.72. On the contrary, the piston 2.3 is located in the cylinder chamber 69.
．． When moving inward within 70 for a discharge operation, the suction valves 79, 80 are seated on the valve seats 77, 78 and closed. .

Further, referring to FIG. 3, a hole 81 that opens laterally is bored in the side of the partition member 13.
1 is closed by the inner surface of the cylindrical body 6 when the partition member 13 is fixed to the inner surface of the cylindrical body 6 to form a suction chamber 82 . An oil-impregnable porous metal or wire mesh 83 is inserted into the suction chamber 82 . Further, a suction pipe 84 is connected to the cylindrical body 6 so as to communicate with the inside of a suction chamber 82.
A small amount of lubricating oil is sucked into the suction chamber 82 along with a fluid such as a refrigerant for an electric refrigerator. The partition member 13 has a pair of suction holes 8 that open near the bottom of the suction chamber 82 and communicate with the low pressure chambers 14 and 15 on both sides of the partition member 130, respectively.
5.86 are drilled in each case. Accordingly, the sucked fluid is distributed from the suction chamber 82 to the suction holes 85, 86 and flows into the two image pressure chambers 14, 15, respectively. In addition, the lubricating oil introduced into the suction chamber 82 is
It diffuses into the interior by capillary action and is further distributed along with the fluid to the low pressure chamber 14.15 through the suction hole 85.86. Such lubricating oil serves in each low-pressure chamber 14.15 to lubricate each piston 2.3 and the inner surface of the cylinder chamber 69.70. In addition, the lubricating oil diffused and contained in the porous metal and wire mesh 83 becomes atomized when it is entrained in the fluid, so that it is uniformly distributed and supplied to the outer surface of the piston 2.3. Furthermore, since the fluid sucked into the suction chamber 82 from the suction pipe 84 expands within the suction chamber 82, suction noise is effectively reduced. Therefore, the suction chamber 82 has a function as a lubricating oil distributor and a muffler.

An annular groove 87 is formed on the inner surface of the partition member 13 corresponding to the discharge valve chamber 63 of the through hole 53. on the other hand,
The liner 62 has a slit 88 formed in a part of the circumferential direction over the entire length in the axial direction, and a cross section perpendicular to the axis is formed in an arc shape with a center angle of nearly 360 degrees. Therefore, no matter how the Lychiro 2 is arranged within the through hole 53, the discharge valve chamber 63 and the annular groove 87 will always communicate with each other. The material of the liner 62 is required to be hard and have excellent wear resistance in order to guide the discharge valves 66, 67'e, but as described above, the slits 88 are completely formed and the partition member 1
By forming an annular groove 87 in the partition member 13, a hole for guiding the fluid from the discharge valve chamber 63 is provided in the liner, and the trouble of arranging the liner so that the hole corresponds to the discharge hole bored in the partition member 13 is eliminated. This eliminates the need for additional work.

Referring again to FIG. 2, the partition member 13 is provided with a small diameter discharge hole 90 which communicates with the annular groove 87 at one end and communicates with the high pressure chamber 89 at the other end. , is formed by closing a hole 91 opened toward the right low pressure chamber 15 and bored in the partition member 13 parallel to the axis of the casing 1 with a lid member 92 .

This lid member 92 is basically in the shape of a thick disk, and has holes 9
10 Metal flow material 93 between the undercut stepped part
It is press-fitted and fixed into the hole 91 with the .

Fluid flowing into the pressure chamber 89 from the discharge valve chamber 63 through the slit 88, annular groove 87 and discharge hole 90 expands when flowing into the high pressure chamber 89 from the small diameter discharge hole 90, thereby reducing discharge noise. be done.

One end of a discharge pipe 94 that communicates with the high pressure chamber 89 is connected to a lid member 92 that closes the high pressure chamber 89, and this discharge pipe 94 extends through the right low pressure chamber 15 along the inner surface of the cylindrical body 6. It is drawn out through a guide tube 95 provided in the closing member 8 and connected to a condenser of an electric refrigerator or the like. After the guide tube 95 is inserted into the through hole 96 formed in the closing member 8, its one end 97 is attached to the closing member 8 by brazing welding.
is fixed all around. Furthermore, since it is necessary to keep the low pressure chamber 15 airtight, the other end 98 of the guide tube 95 and the discharge tube 94 are also fixed over the entire circumference by brazing welding.

However, the position where the guide tube 95 is provided is close to the permanent magnet 17, as is clear from FIG. Therefore, if one end 97 of the guide tube 95 is brazed and welded to the closing part 8 after the closing member 8 is fitted and fixed to the cylindrical body 6, the heat from the brazing welding will cause the closing member 8 and the cylindrical body 6 to The heat is then transmitted to the permanent magnet 17, and the permanent magnet 17 is affected by heat. Therefore, one end 97 of the guide tube 95 is inserted into the through hole 96 and brazed welded before the closing member 8 is fitted and fixed to the cylindrical body 6. Next, after fitting and attaching the closing member 8 to the cylindrical body 6 while inserting the discharge pipe 94 into the guide pipe 95, the guide pipe 9
5 and the discharge pipe 94 are brazed and welded together. At this time, since the other end 98 of the guide tube 95 is in a position away from the permanent magnet 17, the permanent magnet 17 is not affected by heat due to brazing welding.

At both ends of the casing 1, that is, at both closure members 7.8,
Sealed terminal 101.1 for connecting socket connection terminal 99.100 while keeping each low pressure chamber 14.15 airtight
02 is inserted and fixed. That is, through holes 103 and 104 concentric with the cylindrical body 6 are bored in both of the closing members 7.8, and a step formed in the middle of these through holes 103 and 104 faces inward of the casing 1. Sealed terminals 101, 102 are fixed to the circularly bent edges 107, 108 of portions 105, 106, respectively, by projection welding.

The sealed terminal 101 has a cylindrical portion 109 and a conical portion 1101I:
A holding frame 111K made of a conductive material.

The terminal bar 11 is inserted through a non-conductive material such as a glass body 112.
3 are held concentrically. This sealed terminal 1U1 is placed in line contact with the entire outer surface bent edge 107 of the conical portion 110 in the holding frame 111, and the closing member 7
By creating a potential difference between the holding frame 111 and the holding frame 111, projection welding is performed. At this time, the holding frame 111
The outer circumferential surface of the cylindrical portion 109 and the inner circumferential surface of the through hole 103 are close to each other, and there is a possibility that projection welding at the bent edge 107 may be inhibited. Therefore, when inserting the sealed terminal 101 into the through hole 103, the cylindrical portion 10
A cylindrical insulator 114 made of an electrically insulating material is interposed between the outer circumferential surface of the terminal 9 and the inner circumferential surface of the through hole 103.
Projection welding is ensured at the line contact area. In this way, the airtightness of the low pressure chamber 14 is maintained.

Moreover, the terminal rod 113 of the sealed terminal 101 passes through the insulating plate 31 and the receiver is fitted into the cylindrical connecting member 115 fixed to the plate 33. This allows the terminal bar 113 to connect to the connecting member 11.
The receiver is electrically connected to the plate 33 via 5.

The other sealed terminal 102, like the above-mentioned sealed terminal 101, has a holding frame 11 consisting of a cylindrical portion 116 and a conical portion 117.
8 holds a terminal rod 120 through a glass body 119, and with a cylindrical insulator 121 interposed between the cylindrical portion 116 and the inner surface of the through hole 104, the bent edge 108 and the conical portion 117 are connected to each other. are fixed by projection welding, and the terminal rod 120 is fitted into the cylindrical connecting member 136. In this way, the sealed terminal 1 is placed in the middle of the through hole 103.
01 and 102, and terminal rods 113 and 120 project from these sealed terminals 101 and 102, respectively. Socket connection terminals 99 and 100 are fitted into these terminal bars 113 and 120, respectively.

The socket connection terminals 99.100 are connected to the terminal bar 113.
Female terminal part 122, 123 for receiving 120
An insulating layer 124 made of an electrically insulating material such as synthetic resin.
．． 125, and the outer surface of each insulating layer 124, 125 has a plurality of cutouts that slope radially outward from the open end portion toward the rear and have stepped portions 126, 127 formed at the rear end. Stopper claws 128 and 129 are provided projecting at intervals in the circumferential direction. On the other hand, the middle of the through hole 103.104 in the closing member 7.8 means the sealed terminal 101.10.
2, each sealed terminal 10 at a location axially spaced from
1. Locking surface 130.131 that forms a step facing the 102 side
are formed respectively.

Each socket connection terminal 99, '100 is removed with a mark 128
．． The terminal bar 113.120 is inserted into the through hole 103.104 while bending the terminal bar 129, thereby inserting the terminal bar 113.120 into the female terminal portion 122.123 and electrically connecting it. At this time, each removal stopper claw 128.129 has a locking surface 130.131.
are respectively engaged with the socket connection terminals 99 , and thus the socket connection terminals 99
．． 100 is prevented from coming out of the through holes 103, 104.

AC power supply 132 is connected between socket connection terminals 99 and 100.
and switch 133 are connected in series. In addition, an insertion hole 134 is bored in the partition part 13 parallel to the axis of the casing 1, and a plate 47.4 is provided in this insertion hole 134.
Covered connection #j to connect 8! 135 is inserted. Further, the receiver plate 37 is connected to one end of the drive coil 4, the other end of the drive coil 4 is connected to the receiver plate 43, the receiver plate 44 is connected to one end of the drive coil 5, and the other end of the drive coil 4 is connected to the receiver plate 44. The end of the receiver is connected to plate 38.

In this way, the female terminal portion 122 is connected to the AC power source 132.
, terminal bar 113, connection member 115, receiver plate 33, resonance coil spring 39, receiver plate 37, drive coil 4, receiver plate 43
, resonant coil spring 49, plate 47 as a receiver, coated connection wire 135
, the receiver is plate 48, the resonance coil spring 50, the receiver is plate 44, the drive coil 5, the receiver is plate 38, the resonance coil spring 40, the receiver is plate 3
4. Connection member 136, terminal bar 120, female terminal part 12
AC power supply 132 via 3 and switch 133 in sequence.
An electrical closed circuit is formed that returns to .

Here, the complete magnetization direction of the permanent magnets 16 and 17 will be explained as follows.
The result is as shown in FIG. That is, if the iN pole is on the inner surface of the permanent magnet 16 facing the drive coil 4 corresponding to one of the 5 drive coils 4, then the inner surface of the permanent magnet 17 corresponding to the other drive coil 5 is the inner surface facing the drive coil 5. is the S pole.On the other hand, the inner surface of the permanent magnet 17 may be set as the 4s pole on the inner surface of the permanent magnet 16 (zN pole). The driving coils 4.5 are wound in opposite directions, and the driving coils 4.5 are wound in the same direction.

In this way, when the switch 133 is turned on and an alternating current flows through both drive coils 4.5, during a half cycle of the alternating current, the magnetic forces in the drive coils 4.5 approach each other as shown by the solid arrows. In the next half cycle, magnetic force F acts on both drive coils 4.5 in directions that separate them from each other as indicated by the broken line arrows. In this way, by energizing both drive coils 4.5 connected in series with alternating power, drive coil 4 and piston 2, as well as drive coil 5 and piston 3, reciprocate in opposite directions.

Next, to explain the operation of this embodiment, switch 1
33 is electrically connected and the drive coil 4.5'ff is energized by alternating power, the piston 2.3 reciprocates in opposite directions to perform fluid suction and discharge operations. On this occasion,
The directions of movement of the two pistons 2.3 are mutually opposite, but when one is performing a dispensing action, the other piston 2.3 is also performing a dispensing action.

Since the vibration directions due to the movement of the pistons 2.3 are mutually opposite, the vibrations cancel each other out.

Therefore, the vibrations exerted on the casing 1 become extremely small, making it possible to directly attach the casing 1 to an electric refrigerator, etc., which was conventionally necessary to prevent the vibrations of the casing from being exerted on the outside. The entire container can be omitted, making it possible to downsize. There is also the advantage that the trench casing 1 can be directly cooled with the outside air. Furthermore, since the vibration system is divided into two, the relatively small capacity 2
A large capacity dead metal can be achieved by combining all two vibration systems, and 3 resonant coil springs! (, 40, 49, 50 can be extended in life.

Due to the movement of both pistons 2.3 in mutually opposite directions, the suction pipe 8
The suction noise of the fluid sucked into the suction chamber 82 from the suction chamber 82 is reduced by the silencing effect of the expansion in the suction chamber 82, and the fluid is introduced into the image pressure chambers 14.15 by force distributed to the suction holes 85.86. Lubricating oil 137 accompanying the fluid introduced from the suction chamber 82 is stored in the lower part of both low-pressure interiors 14.15, and this lubricating oil 137
3 and into the low pressure chamber 14.15 by the blade plate 28.29 which physically reciprocates. This scattered ff
al The lubricating oil adheres uniformly to the outer surface of the piston 2.3,
As a result, a lubrication effect between the piston 2.3 and the inner surface of the cylinder chamber 69.70 is achieved, and smooth movement of both pistons 2.3 is maintained.

During the suction movement of the piston 2.3, the fluid in the low pressure chamber 14.15 is introduced into the cylinder chamber 69.70 through the piston 2.3 and through the suction valve 79.80, and is further introduced into the cylinder chamber 69.70.
During the discharge movement of 3, the discharge valve chamber 63 passes through the discharge valves 66 and 67.
will be introduced in When the fluid discharged into the discharge valve chamber 63 flows into the high pressure chamber 89 through the discharge hole 90, it expands, its discharge noise is reduced, and is further led to a condenser of an electric refrigerator or the like through a discharge pipe 94.

As another embodiment of the present invention, as shown in FIG.
5 may be wound in opposite directions.

Even in this case, the magnetic forces F? in the directions that the drive coil 4.5 approaches each other as shown by the solid arrows during a half cycle of the alternating current. Then, in the next half cycle, the magnetic forces F-i in opposite directions can be applied as shown by the dashed arrows.

As described above, according to the first invention, since the pair of pistons are all reciprocated in opposite directions within the casing with both ends closed, the vibrations caused by the reciprocating motion of the pistons are mutually canceled out. Therefore, the casing can be supported by a support without being covered with a container, and the heat generated within the casing can be cooled with the outside air, making it possible to reduce the overall size. Furthermore, since the two sets of pistons and the drive coil are each supported in a floating manner by all the resonant coil springs, each resonant coil spring has sufficient strength, making it easy to increase the capacity.

According to the second aspect of the invention, the inside of the casing is partitioned by a partition member located in the axial center of the casing, and the partition member includes a pair of cylinders into which screws are slidably and loosely fitted. In addition, a common discharge valve chamber is formed between these cylinder parts via a discharge valve, so that the first
In addition to the effects of the invention, the structure can be extremely simplified.

Furthermore, according to the third invention, since both drive coils are electrically connected in series, in addition to the effects of the first invention, the same current can be passed through both drive coils without providing any special means. This makes it possible to reciprocate both drive coils with the same magnetic force, simplifying the structure.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall longitudinal cross-sectional view of one embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view showing an enlarged view of the partition member 13 and its vicinity in FIG. 1. 3 is a sectional view taken along the line II+-1II in FIG. 2, and FIG. 4 is a simplified illustration of the magnetizing direction of the permanent magnet 16.17 and the winding direction of the 1 drive coil 4.5 in FIG. 1. The circuit diagram, FIG. 5, is a circuit diagram schematically showing the magnetization direction of the permanent magnets 16 and 17 and the winding direction of the drive coil 4 and 50 in another embodiment of the present invention. 1...Casing 2.3...Piston 4.5...1 Drive coil 16.17...Permanent magnet 18.19...Gap 20.21...Pole piece 39.40.49. 50... Resonant coil spring 51.5
2... Cylinder part 63... Discharge valve chamber 66.67... Discharge valve Patent applicant Sawafuji Electric Co., Ltd. Figure 2 Side - -532- Figure 4 Figure 5

Claims (3)

[Claims] (1) A pair of permanent magnets and a pair of pole pieces each forming an annular gap between the permanent magnets are placed in a cylindrical casing with both ends closed at the axial center of the casing. A pair of driving coils, in which a pair of pistons are individually integrated and energized by alternating electric power, are disposed in each gap, and each piston is slidable. A pair of cylinder portions are integrally provided with the casing, and the two pairs of drive coils and pistons are floatingly supported by resonant coil springs so as to be freely movable in the axial direction of the casing. A vibratory compressor, characterized in that the winding direction of the drive coils, the electrical connection between the drive coils, and the direction of the magnetizing force of the permanent magnets are selected such that the moving directions of the drive coils are opposite to each other. (2) A pair of permanent magnets and a pair of pole pieces each forming an annular gap between the permanent magnets are arranged in a cylindrical casing with both ends closed in the axial direction of the casing. A pair of drives are provided symmetrically and fixedly with respect to a partition member that partitions and fixes the inside of the casing at the center, and in each gap, a pair of pistons is individually integrated and is energized by alternating power. A coil is disposed in the partition member, and a pair of cylinder parts into which each of the pistons is slidably and loosely fitted are provided with the same axes (~), and a pair of discharge valves are provided between the two cylinder parts. A common discharge valve chamber is formed through the casing, and the two pairs of driving coils and pistons are floatingly supported by a resonant coil spring so as to be movable in the axial direction of the casing. A vibratory compressor, characterized in that the electrical connection mode and the magnetization direction of each of the permanent magnets are selected such that the moving directions of the sub-drive coils are mutually opposite. (3) In a cylindrical casing with both ends closed, a pair of permanent magnets and a pair of pole pieces each forming an annular gap between the permanent magnets are installed at the center in the axial direction of the casing. A pair of driving coils, in which a pair of pistons are individually integrated and energized by alternating electric power, are disposed in each gap, and each piston is slidable. A pair of cylinder parts loosely fitted into the casing are provided integrally with the casing, two pairs of drive coils and pistons are floatingly supported so as to be movable in the axial direction of the casing, and each of the drive coils is electrically connected to the casing. connected in series, and the winding direction of each drive coil is the same, and the magnetic poles of the respective permanent magnets on the side facing the corresponding drive coil are mutually opposite, or the winding direction of each drive coil is mutually opposite. A vibratory compressor characterized in that the magnetic poles of each of the permanent magnets on the side facing the drive coil are the same.