JP3301285B2 - Vibrating 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 vibrating compressor, and more particularly, to a measure for reducing the size and weight of a compressor while ensuring the operation of filling a working fluid into a compression well.

[0002]

2. Description of the Related Art Conventionally, as one type of a small refrigerator that generates cryogenic-level cold, for example, Japanese Unexamined Patent Publication No. Hei 6-281
A free displacer type Stirling refrigerator disclosed in Japanese Patent Publication No. 278 is known. This refrigerator is configured such that a compressor that compresses refrigerant gas and an expander that expands refrigerant gas discharged from the compressor are connected by a connection pipe.

The structure of the compressor will be described. As shown in FIG. 7, the compressor (a) comprises a cylindrical body (b1) and disk-shaped closing plates (b2, b2). A cylindrical casing (b) whose inside is sealed, a cylinder (c) provided in the casing (b), and a reciprocatingly fitted fit in the cylinder (c). It has a pair of pistons (e, e) forming a compression chamber (d) in the space, and a linear motor (f) as a drive source for driving the piston (e) back and forth. In the cylinder (c), a cylindrical recess (c1) concentric with the cylinder (c) is formed on the outer peripheral side of the compression chamber (d). The linear motor (f) is provided with the concave portion (c1).
An annular permanent magnet (g) is disposed in the inside of the cylinder, and the permanent magnet (g) generates a magnetic field using the cylinder (c) as a yoke. Also, in the recess (c1),
A substantially inverted cup-shaped bobbin (h) integrally fixed to the piston (e) at the center is provided so as to be able to reciprocate.
A drive coil (i) is provided on the bobbin (h) located in (c1), and the drive coil (i) is attached to the permanent magnet (g).
And it is arranged facing. Each of the closing plates (b2, b2) of the casing (b) has a pair of current introduction terminals (m, m,...).
Are arranged in a penetrating state, and the drive coil (i)
Lead wires (j, j) for supplying a current to the current supply terminals (m, m) are respectively derived from the bobbins (h) and connected to the current introduction terminals (m, m). That is, the upper current introduction terminal (m) in FIG. 7 is connected to the upper drive coil (i) by the lower current introduction terminal (m).
From (m), current is supplied to the lower drive coil (i), respectively. Furthermore, the outer surface of the bottom surface of the bobbin (h) (the side opposite to the piston) and the closing plate (b) of the casing (b)
A piston spring (k) for elastically supporting the piston (e) so as to be able to reciprocate is installed between the inner surface of 2) and the piston spring (k). One end of the cylinder (c) has a compression chamber (d).
In addition, gas passages (c2) each having the other end open to the outer surface of the casing (b) are formed. Then, one end of the connecting pipe (n) is connected to the gas passage (c
The other end of the connecting pipe (n) is connected to an expander (not shown).

When the refrigerator is driven, an alternating current having a predetermined frequency is applied to the drive coil (i) through the lead wire (j), and the drive coil (i) is acted upon by a magnetic field formed around the drive coil (i). Drive bobbin (h) to drive piston
(e) is reciprocated linearly in the cylinder (c), and the compression chamber (d)
Then, a gas pressure of a predetermined cycle is generated, and the compressed refrigerant gas is sent to the expander by the connecting pipe (n) to expand the refrigerant gas in the expander, thereby causing cold.

[0005] The compressor (a) is provided with a charge port (o) for charging a refrigerant gas into the casing (b) during assembly. This charge port (o)
Are formed in the cylindrical body (b1) and the cylinder (c) of the casing (b), one end of which is open to the outside of the casing (b) and the other end is open to the recess (c1) of the cylinder (c). I have. Also,
The charge port (o) can be sealed by a sealing bolt (p). Further, as shown in FIG. 8, the outer periphery of the casing (b) around the charge port (o) is provided with a charging jig used for filling the working gas.
A mounting seat (r) for mounting (q) is integrally formed. This mounting seat (r) has a flat part (r1) for mounting the charge jig (q). When filling the working gas, this flat part (r1) has an O-ring (s) (Fig. 9) is attached via the charging jig (q).

When charging the working gas into the casing (b), a charge jig (q) is mounted on the flat portion (r1) of the mounting seat (r) as shown in FIG. In this state, rotate the handle (q1) of the charge jig (q) to
With (p) loosened, air is evacuated from the inside of the casing (b) by the charging pipe (q2) connected to the charging jig (q) to create a vacuum, and then the working gas is filled. Operate the handle (q1) of the charging jig (q) again to close the sealing bolt (p).
To seal the charge port (o).

[0007]

As described above, in this type of compressor (a), the mounting seat (r) for mounting the charge jig (q) is mounted on the outer peripheral surface of the cylindrical portion (b1) of the casing (b). ) Exists,
This mounting seat (r) has a flat surface (r1) for mounting the charging jig (q) while ensuring high airtightness, while the outer peripheral surface of the cylindrical portion (b1) of the casing (b) is a curved surface. ), The mounting seat (r) will protrude greatly from the outer peripheral surface of the cylindrical portion (b1) of the casing (b) (see FIG. 8). For this reason, there is a limit in reducing the size and weight of the entire compressor. In other words, the mounting seat (r), which is necessary only at the time of charging the refrigerant gas, remains on the outer peripheral surface of the casing (b) even after the charging, so that the entire compressor becomes large and heavy, and this compression becomes large. When the compressor is installed at a predetermined installation position, the installation space is large, and the strength of the support structure of the compressor needs to be secured large.

[0008] The present invention has been made in view of this point, and by changing the position of the charge port,
An object of the present invention is to eliminate the need for a mounting seat for mounting a charge jig, thereby reducing the size and weight of the entire compressor.

[0009]

In order to achieve the above-mentioned object, the present invention has been made by providing a charge port on one flat surface portion of a cylindrical casing and a current introduction terminal on the other portion. Was arranged.

Specifically, the invention according to claim 1 is a cylindrical body.
(3a) and a flat closing plate for closing both ends of the cylindrical body (3a)
(3b, 3b), and the casing (3).
(3) The cylinder member (4) disposed in the
Inside the material (4), relative to the cylinder member (4).
The cylinder member (4) is provided so as to be able to reciprocate.
And a pair of pistons (6, 6) forming a compression chamber (7)
And each piston (6, 6) with respect to the casing (3).
Resilient means (14, 14) for elastically supporting reciprocally;
Each of the pistons (6, 6) is provided corresponding to each of the pistons.
(6, 6) so as to approach and separate from each other in the cylinder member (4).
A plurality of driving means (10, 10) for returning, and each of the driving means (1
(0,10) and a plurality of current introduction terminals (19,19)
And supplying a current to each of the driving means (10, 10).
Each piston (6,6) against the cylinder member (4)
Compress the working fluid in the compression chamber (7) by relatively reciprocating
It is assumed that a vibrating compressor is used. And the driving hand
The step (10) is the outer periphery of the compression chamber (7) in the cylinder member (4).
Side recess (4d), and is connected to the cylinder member (4).
A magnet (11) forming a magnetic circuit as an iron part, and the piston
Cylindrical bobbin connected to the housing (6) and extending into the recess (4d).
(13) and the magnetic circuit of the magnetic circuit provided on the bobbin (13).
Placed opposite the magnet (11) so as to be located in the field,
Coil (12) supplied with current from current introduction terminals (19, 19)
Supplying current to the coil (12).
The piston (6) relative to the cylinder member (4).
Reciprocating motion to compress the working fluid in the compression chamber (7).
The one closing plate (3b) has a casing
When filling the working fluid into (3), the one closing plate (3b)
Chassis released by the attached charge jig (25)
Storage port (18) and the other obturator plate (3b)
Two current introduction terminals (19, 19) are provided,
The lead-in terminal (19) is connected to the coil (12,12) of both drive means (10,10).
At one end, and the other side of the current introduction terminal (19) of the two drive hands
Connected to the other end of the coil (12,12) of the step (10,10) respectively
Configuration.

According to the present invention, each drive
Supply current to the driving means (10, 10) from the current supply terminals (19, 19)
By doing so, each piston (6, 6) becomes a cylinder member (4).
Reciprocating relative to the compression chamber (7).
Will compress the working fluid. In the present invention,
Connect the current introducing terminals (19, 1) to the other closing plate (3b) or cylindrical body (3a).
9), one of the closing plates (3b) is charged.
Port (18)
There is no need for a charging jig mounting seat. And the case
When filling the working fluid into the ring (3),
Attach the charging jig (25) to (3b), and
5) Open the charge port (18) by
A body filling operation is performed.

Further, the structure of the driving means (10) can be embodied,
The practicality of the compressor can be improved.

Further, each coil (1) is provided inside the casing (3).
2,12) are connected in parallel.
Only by connecting the child (19) to the power supply, each coil (12)
Can be connected in parallel to
You can avoid.

According to a second aspect of the present invention, the cylindrical body (3a) and the circle
Flat closing plates (3b, 3b) for closing both ends of the cylindrical body (3a);
And a casing (3) comprising:
Cylinder member (4) and the inside of the cylinder member (4).
Reciprocating relative to the cylinder member (4)
And compressed between the cylinder member (4)
A pair of pistons (6, 6) forming a chamber (7);
(6, 6) to reciprocate with respect to the casing (3).
Elastic means (14, 14) for elasticity support and each of the pistons (6, 6)
Each piston (6, 6) is provided with a syringe.
Multiple members that reciprocate within the
Drive means (10, 10) and currents to the respective drive means (10, 10).
A plurality of current introduction terminals (19, 19) for supplying
By supplying current to the driving means (10, 10),
Relatively reciprocating tons (6,6) for the cylinder member (4)
Vibrating compressor that compresses the working fluid in the compression chamber (7)
Is assumed. Then, the one closing plate (3b)
When filling the casing (3) with working fluid,
By the charging jig (25) attached to the closing plate (3b)
An open charge port (18) is provided. Cha
A sealing bolt (20) is attached to the storage port (18)
The charging jig (25) is sealed in the internal space (A).
Airtight on one obstruction plate (3b) so that the
A main body (26) attached to the main body (26);
The charge port is operated by operating the sealing bolt (20).
The operation rod (27) for opening and closing the port (18) and the body (26)
Communicates with the internal space (A), and through the internal space (A), the case
Discharges and introduces fluid into the internal space of
And a charging pipe (28), and the main body (26)
Attached to one closing plate (3b) and operated by operating rod (27)
Open the charge port (18) by operating the sealing bolt (20)
Of the casing (3) from the charging pipe (28).
Discharge and introduction of fluid into the space
You. The current introducing terminals (19,
19), and one of the current introduction terminals (19) is
(10,10) at one end of the coil (12,12) and at the other end
The current introduction terminal (19) is connected to the coils (12, 1) of both drive means (10, 10).
2) are connected to the other ends respectively.

With such a configuration, the other closing plate (3b)
Or, make sure that the cylindrical body (3a) is equipped with current introduction terminals (19, 19).
And one of the closing plates (3b) is provided with a charge port (18).
The working fluid in the casing (3).
When filling, charge jig (25) is attached to one closing plate (3b).
Install and charge port with this charge jig (25)
By releasing (18), a fluid filling operation is performed.

Further , a charge jig used for filling is used.
(25) and charging of the working fluid by the charging jig (25).
The filling operation can be specifically obtained.

Further, each coil (1) is provided inside the casing (3).
2,12) are connected in parallel.
Only by connecting the child (19) to the power supply, each coil (12)
It can be connected in parallel for, turn the connection mistake of wiring
You can avoid.

According to a third aspect of the present invention, the cylindrical body (3a) and the circle
Flat closing plates (3b, 3b) for closing both ends of the cylindrical body (3a);
And a casing (3) comprising:
Cylinder member (4) and the inside of the cylinder member (4).
Reciprocating relative to the cylinder member (4)
And compressed between the cylinder member (4)
A pair of pistons (6, 6) forming a chamber (7);
(6, 6) to reciprocate with respect to the casing (3).
Elastic means (14, 14) for elasticity support and each of the pistons (6, 6)
Each piston (6, 6) is provided with a syringe.
Multiple members that reciprocate within the
Drive means (10, 10) and currents to the respective drive means (10, 10).
A plurality of current introduction terminals (19, 19) for supplying
By supplying current to the driving means (10, 10),
Ton (6,6) reciprocating relative to cylinder member (4)
Vibrating compressor that compresses the working fluid in the compression chamber (7)
Is assumed. The driving means (10) is a cylinder member
(4) is provided in the recess (4d) on the outer peripheral side of the compression chamber (7).
A magnetic circuit is formed using the cylinder member (4) as a yoke.
Formed by the magnet (11) and the piston (6)
A cylindrical bobbin (13) extending into the portion (4d), and the bobbin (13)
So that it is located in the magnetic field of the magnetic circuit.
It is placed facing the magnet (11), and the current introduction terminals (19, 19)
And a coil (12) to which current is supplied.
The piston (6) by supplying current to the
The compression chamber is reciprocated relative to the cylinder member (4).
It is configured to compress the working fluid in (7). Up
The one closing plate (3b) has a working fluid inside the casing (3).
When filling, the chamber attached to the one closing plate (3b)
The charge port (18) opened by the storage jig (25)
Is provided, and current is introduced to four locations on the other obturator plate (3b).
Terminals (19, 19,…) are provided and two current introduction terminals (19, 19,
19) are at both ends of the coil (12) of one drive means (10) and
The other two current introduction terminals (19, 19) are connected to the other drive means (1
(0) coil (12)
You.

With such a configuration, the other closing plate (3b)
Or, make sure that the cylindrical body (3a ) is equipped with current introduction terminals (19, 19).
And one of the closing plates (3b) is provided with a charge port (18).
The working fluid in the casing (3).
When filling, charge jig (25) is attached to one closing plate (3b).
Install and charge port with this charge jig (25)
By releasing (18), a fluid filling operation is performed.

Further, the structure of the driving means (10) can be embodied,
The practicality of the compressor can be improved.

Further, outside the casing (3), each coil
Select whether to connect (12,12) in parallel or in series.
Each coil (12,12) as necessary
It will be possible to connect them in series.

According to a fourth aspect of the present invention, there is provided a cylindrical body (3a) and the cylindrical body (3a).
(3a) and a flat closing plate (3b, 3b) for closing both ends.
And a casing (3) disposed in the casing (3).
Cylinder member (4), and inside the cylinder member (4),
Reciprocal movement relative to the cylinder member (4) becomes possible.
And the compression chamber between the cylinder member (4)
(7) and a pair of pistons (6, 6)
(6, 6) is elastic so that it can reciprocate with respect to the casing (3).
Elastic means (14, 14) to support and each of the pistons (6, 6)
Each piston (6, 6) is installed in a cylinder
A plurality of members reciprocatingly move toward and away from each other in the member (4).
A current is supplied to the driving means (10, 10) and the respective driving means (10, 10).
A plurality of current introduction terminals (19, 19) for supplying
By supplying current to the driving means (10, 10).
(6, 6) is reciprocated relative to the cylinder member (4).
To compress the working fluid in the compression chamber (7).
It is assumed. On one of the closing plates (3b), a casing
When the working fluid is filled in the plug (3), the one closing plate (3b)
That is released by the charge jig (25)
Charge port (18) and charge port (1
8) is provided with a sealing bolt (20) that can be freely opened and closed. H
The charging jig (25) has a sealing bolt (20) in the internal space (A).
Airtightly attached to one obstruction plate (3b) so that
Body part (26), and a sealing bolt supported by the body part (26).
Open / close the charge port (18) by operating (20)
Operating rod (27) and the internal space (A) of the main body (26).
Through the interior space (A) of the casing (3).
Charge piping for discharging and introducing fluid into the space
(28), and the main body (26) is provided with one of the closing plates (3
b) Attaching to the operating rod (27) and sealing bolt (20)
Operation to open the charge port (18) and charge
Fluid from the piping (28) to the internal space of the casing (3).
Emissions and introductions take place. The other
Current introduction terminals (19, 19,…) are provided at four places on the closing plate (3b)
And two current introduction terminals (19, 19) are connected to one drive means (1
0) at both ends of the coil (12) and the remaining two current introduction terminals
Child (19, 19) is attached to both ends of the coil (12) of the other drive means (10).
Each is connected.

With such a configuration, the other closing plate (3b)
Or, make sure that the cylindrical body (3a) is equipped with current introduction terminals (19, 19).
And one of the closing plates (3b) is provided with a charge port (18).
The working fluid in the casing (3).
When filling, charge jig (25) is attached to one closing plate (3b).
Install and charge port with this charge jig (25)
By releasing (18), a fluid filling operation is performed.

The casing (3) is filled with a working fluid.
Of the charging jig (25) used for
The operation of filling the working fluid with the jig (25) can be specifically obtained.
Can be.

Further, outside the casing (3), each coil
Select whether to connect (12,12) in parallel or in series.
Each coil (12,12) as necessary
It will be possible to connect them in series.

The invention according to claim 5 provides the above-mentioned claim 1 or
Is a charge port (18) in the vibratory compressor described in 3.
Is provided with a sealing bolt (20) that can be freely opened and closed.
The jig (25) has a sealing bolt (20) located in the internal space (A).
Airtightly attached to one closure plate (3b)
A main body (26) and a sealing bolt (2) supported by the main body (26);
Open / close the charge port (18) by operating (0)
Connect the operation rod (27) to the internal space (A) of the main body (26).
Through the internal space (A) and through the internal space of the casing (3) .
Between the charging pipes (2
8), and the main body part (26) has one closing plate (3b).
Of the sealing bolt (20) with the operating rod (27)
Open charge port (18) by operation to charge
Drain the fluid from the pipe (28) to the internal space of the casing (3).
It is configured to take out and introduce.

According to this structure, the first or third aspect of the present invention is provided.
In the described invention as well, the working fluid is contained in the casing (3).
Configuration of charge jig (25) used for filling
The filling operation of the working fluid by the
Can be

[0028]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a compressor (1) for a Stirling refrigerator according to the present embodiment. The compressor (1) is a piston-opposed vibratory compressor, and has a closed cylindrical casing (3). Inside the casing (3),
A cylinder member (4) is provided. The casing (3) includes a cylindrical body (3a) having both open ends, and the cylindrical body (3a).
(3a) disk-shaped closing plates (3b, 3b) for closing open portions at both ends. The cylinder member (4) is made of pure iron, and has an outer cylinder (4a) fixed to the inner wall of the casing (3);
An inner cylinder (4b) arranged at a position at a predetermined interval inside the outer cylinder (4a) is connected by a donut-shaped connecting portion (4c), and the outer cylinder (4a) A cylindrical recess (4d) concentric with the cylinder member (4) is formed between the inner cylinder (4b) and the inner cylinder (4b). Further, the inner cylinder (4b) is a part which becomes an original cylinder, and the center thereof is formed in the piston insertion hole (5).

A piston (6, 6) is inserted into the piston insertion hole (5) of the cylinder inner cylinder (4b) from both the upper and lower sides in FIG. 1, and a cylinder is inserted between the pistons (6, 6). A portion surrounded by the inner cylinder (4b) is formed in the compression chamber (7). The outer diameter of the piston (6) is
The diameter is slightly smaller than the inner diameter of (4b), and a small gap (not shown) of, for example, about 10 μm is formed between the two, and this small gap is sealed by a clearance seal or fluid seal (not shown). Being a compression chamber
(7) airtightness is ensured.

Further, a gas passage (8) extending in a radial direction from the piston insertion hole (5) is formed in the cylinder member (4), and an inner end of the gas passage (8) is connected to the compression chamber (7). Opening,
The gas passage (8) is communicated with an internal passage (9a) of the connecting pipe (9), and the compressor (1) and an expander (not shown) are connected through the connecting pipe (9).

Each of the pistons (6, 6) is drivingly connected to a linear motor (10, 10) as driving means for reciprocatingly driving the piston (6, 6). That is, each of the linear motors (10, 10) includes a permanent magnet (11) and a coil (12). The permanent magnet (11) is
And (4) a cylindrical magnet externally fitted to the outer peripheral surface of the inner cylinder (4b). As a result, a magnetic circuit is formed by the permanent magnet (11) using the cylinder member (4) made of pure iron as a yoke portion, and a magnetic field of a predetermined strength is formed around the periphery. Each of the pistons (6) is a substantially inverted cup-shaped bobbin (13).
It is supported by. The bobbin (13) has a concave coil winding portion (13a) formed at a position facing the permanent magnet (11) in the outer peripheral portion, and the coil (12a) is formed in the coil winding portion (13a). ) Is wound so that the coil (12) is located in the magnetic field of the magnetic circuit.

Then, an alternating current of a predetermined frequency (for example, 50 Hz) corresponding to a natural frequency determined by the mass of each piston (6, 6) and a spring constant of a spring (14) described later is applied to both linear motors (10, 10). By energizing the coils (12, 12) in synchronization with each other, the pistons (6, 6) reciprocate in opposite directions at the above natural frequency, and a gas pressure of a predetermined cycle is generated in the compression chamber (7). Is configured to generate.

A spring mounting seat (13b) is provided at the center of the bottom of each of the bobbins (13, 13) facing the closing plate (3b) of the casing (3), while the center of the closing plate (3b) is provided. A similar spring mounting seat (3c) is also formed in each part, and the piston (6) and the bobbin (13) reciprocate in the cylinder member (4) over both spring mounting seats (13b, 3c). A spring (14) as an elastic means for movably elastically supporting is provided.

A feature of this embodiment is that one of the upper and lower closing plates (3b, 3b) of the casing (3) is charged with a gas for filling the casing (3) with He gas as a refrigerant gas. The port (18) is provided with a current introduction terminal (19, 19) for supplying a current to the coil (12) on the other side.

First, the charge port (18) will be described. The charge port (18) is formed through the center of the upper closing plate (3b). That is, the charge port (1
The outer end of 8) is open to the outer surface of the upper closing plate (3b), and the inner end is open to the end surface of the spring mounting seat (3c).
The direction in which the charge port (18) extends (vertical direction)
A female screw (18a) is formed in substantially the outer half of. The charge port (18) can be sealed by a sealing bolt (20). This sealing bolt (20) is
0a) is a hexagon socket head cap screw having a hexagonal groove on the end face, and has a male screw portion (20b) that can be screwed into the female screw (18a) of the charge port (18). That is, by screwing the sealing bolt (20) into the charge port (18), the internal space of the casing (3) is sealed, and by loosening the sealing bolt (20), the casing (3) is loosened. ) Communicates with the interior space. FIG. 1 (21) shows a state in which the sealing bolt (20) is screwed into the charge port (18), and is crushed between the sealing bolt (20) and the closing plate (3b). It is a metal seal that secures performance.

Next, the current introduction terminals (19, 19) and their peripheral parts will be described. The current introducing terminals (19, 19) are arranged at two places on the lower closing plate (3b). Specifically, through holes (3d, 3d) for introducing the current introduction terminals (19, 19) are formed at two places on the lower closing plate (3b), and a glass hermetic is formed in the through hole (3d). A seal (22) is fitted, and a current introduction terminal (19, 19) is inserted through an insertion hole formed at the center of the hermetic seal (22). A part of a lead wire (15) for supplying a current to the coil (12) is connected to each of the current introduction terminals (19, 19). In detail, each current introduction terminal (19, 19) has upper and lower coils (12, 12)
Are connected to the two lead wires (15, 15), respectively. Also, a groove (4e) for inserting the lead wire (15) is formed in a part of the outer peripheral surface of the cylinder member (4) in order to supply current to the upper coil (12). Are formed. As a result, each coil (12, 12) is connected in parallel, and each current introduction terminal (19, 19) is connected to both coils (12, 12).
To supply the current. That is, both coils (1
In contrast to 2), current can be supplied only from the lower side.

Next, the operation of the Stirling refrigerator configured as described above will be described. During this operation,
The coil (1) of both linear motors (10, 10) in the compressor (1)
An alternating current of a predetermined frequency (50 Hz) is applied to the lead wire at 2,12).
(15, 15), the coils (12, 12) and the pistons (6, 6) are respectively actuated by the action of the magnetic field generated in the permanent magnet (11) and the cylinder member (4). The piston (6, 6) reciprocates in the opposite direction while deforming the spring (14), and the pistons (6, 6) advance and retreat in synchronization with each other in the cylinder member (4), so that the volume of the compression chamber (7) increases and decreases. Then, a pressure wave of a predetermined cycle is generated in the compression chamber (7). Since the compression chamber (7) communicates with the expander through the coupling pipe (9), the free displacer reciprocates in the expander at the same cycle as the pressure wave in the compression chamber (7). Chilling will occur due to the expansion of the gas in the expansion chamber.

Next, a He gas filling operation performed at the time of assembling or maintaining the compressor (1) will be described. In this He gas filling operation, the He gas is charged from the charge port (18) using the charge jig (25). First, the charge jig (25) will be described. As shown in FIGS. 2 and 3, the charge jig (25) is attached to the upper closing plate (3b) of the compressor (1) and charges He gas from the charge port (18). And a body case as a body having a mounting flange (26a) at a lower end and a through hole (26b) penetrating vertically in a central portion.
(26), and inserted through the through hole (26b) of the main body case (26),
An operating rod (27) having a handle (27a) at the upper end and a charging pipe (28) that communicates with the internal space (A) of the main body case (26) and that can be opened and closed by an on-off valve (28a). Have. The operation rod (27) is formed with a male screw (27d), and the through hole (26b) is formed with a female screw.These screws are screwed into the operation rod (27a) to operate the operation rod (27a). By rotating (27), the operation rod (27) moves up and down. The lower end of the operating rod (27) is formed with a hexagon wrench (27b) that can be engaged with a hexagon hole formed in the head (20a) of the sealing bolt (20). O-rings (29, 29,...) Are provided between the mounting flange (26a) of the main body case (26) and the closing plate (3b), and between the operation rod (27) and the through hole (26b). It is interposed to prevent leakage of He gas.

In the He gas filling operation using the charge jig (25) having such a configuration, first, the main body case (26) of the charge jig (25) is bolted to the closing plate (3b). Stop it. In this state, the internal space (A) of the main body case (26)
There is a sealing bolt (20). From this state, operate the handle (27a) of the operating rod (27) to set the hexagon wrench (27
b) while engaging the sealing bolt (2) with the sealing bolt (2).
Loosen 0). As a result, the male screw portion (2
0b) and a small gap between the internal thread (18a) of the charge port (18) and the internal space of the casing (3) via the internal space (A) of the charge jig (25). (28)
Communicate with And, by this charging pipe (28),
Remove air or gas from the casing interior space to the casing (3)
, And then filled with He gas. Then, with the casing (3) filled with He gas, the handle (27a) of the charge jig (25) is operated again to seal the charge port (18) with the sealing bolt (20). Then, by removing the charge jig (25) from the closing plate
He gas filling operation is completed.

As described above, in the present embodiment, of the respective closing plates (3b, 3b) constituting the cylindrical casing (3), one of the closing plates (3b) has the charge port (18) and the other has the charging port (18). Obstruction plate (3b)
By providing a current introducing terminal (19), the charge jig is attached to the casing without providing a mounting seat, which is a member that protrudes greatly from the outer peripheral surface of the casing to the He gas, unlike the conventional case. , It is possible to reduce the size and weight of the compressor as a whole, and to reduce the installation space and the required supporting strength for the compressor when this compressor is installed at a predetermined installation position. Can be planned.

Conventionally, the closing plate (3b) into which the current introducing terminal (19) is inserted has a relatively large thickness in order to ensure sufficient sealing at the insertion portion of the current introducing terminal (19). In the conventional configuration (see FIG. 7), the current introduction terminals (m, m,...) Are provided on the two closing plates (b2, b2). Both the thicknesses of b2 and b2) had to be increased, which led to an increase in the size of the compressor as a whole. On the other hand, in this embodiment, one (lower) closing plate (b2)
Only the plate thickness needs to be increased, and the plate thickness of the other closing plate (b2) can be reduced, so that the compressor can be downsized.

In this embodiment, since the coils (12) are connected in parallel by the lead wires (15, 15) inside the casing (3), only the current introduction terminal (19) is connected to the power supply. Thus, since each coil (12) can be connected in parallel to the power supply, it is possible to avoid that each coil (12) is connected in series to the power supply due to a wiring connection error.

(Modification) Next, a modification of the above-described embodiment will be described. In this modified example, each modified example of the charge jig (25), the sealing bolt (20), and the current introducing terminal (19) will be described. First, a modification of the charge jig (25) will be described. As shown in FIG. 4, the charge jig (25) of the present example includes a main body case (26).
Are composed of a lower case (31) and an upper case (32). The lower case (31) is provided with a mounting flange (31a) to be mounted on the closing plate (3b) of the casing (3), similarly to the main body case (26) of the above-described embodiment, and the outer peripheral surface of the upper end portion thereof. Is formed with an external thread (31b). On the other hand, the upper case (32) has a female screw (32a) which is screwed to the male screw (31b) at the lower end of the inner peripheral surface.
By rotating the upper case (32) in a state where the and the female screw (32a) are screwed, the upper case (32) is turned into the lower case (31).
It moves up and down relatively to.

The operating rod (27) has an upper case (3
2) is provided with a flange (27c) at the portion located inside, and this flange (27c) can contact the upper end of the upper case (32), and the lower case (32) (3
The operating rod (27) is also lowered with the lowering of (1). Other configurations are substantially the same as those of the charge jig (25) of the above-described embodiment.

When operating the sealing bolt (20) with the charge jig (25), first, the upper case (32)
Is rotated to lower the operation rod, and accordingly, the operation rod (27) also lowers. Thereby, the operation rod (27) is engaged with the head (20a) of the sealing bolt (20). By operating the handle (27a) of the operating rod (27) from this state, the sealing bolt (20) is rotated, and the sealing bolt (20) is screwed or loosened with the closing plate (3b). Let it. With such a configuration, the engagement state of the operation rod (27) with the sealing bolt (20) is reliably obtained, and good operability is ensured.

Next, a modified example of the sealing bolt (20) will be described. As shown in FIG. 5, the sealing bolt (20)
The head has no head and is composed only of the male screw (20b) .The hexagonal wrench (27b) of the charge jig (25) can be engaged with the upper surface of this male screw (20b). A hole (not shown) is formed. According to such a configuration,
In a state where the sealing bolt (20) is screwed into the closing plate (3b) (the state shown in FIG. 5), the sealing bolt from the end face of the closing plate (3b)
Since the amount of protrusion of (20) can be made extremely small, the entire compressor (1) can be further downsized. In this case, the metal seal (21) is disposed at the tip of the male screw portion (20b) of the sealing bolt (20).

Next, a modification of the current introducing terminal (19) will be described. In the embodiment described above, one of the closing plates (3b) is
Of the current introduction terminals (19,19), and each coil (12,12)
Are connected in parallel in the casing (3) via the lead wires (15, 15,...). In this embodiment, as shown in the circuit diagram of FIG. 4 in (3b)
Of the current introduction terminals (19,19,…)
The current introduction terminals (19, 19,...) Are connected to the respective ends of (12) by the lead wires (15, 15,...). In other words, two current introduction terminals (19, 19) are connected to both ends of one coil (12), and the other two current introduction terminals (19, 19) are connected to both ends of the other coil (12). Have been. According to this configuration, it is possible to select whether to connect each coil (12, 12) in parallel or in series outside the casing (3), so that each coil (12, 12 ) Can be connected in series.

In this embodiment, the current introducing terminals (19, 19) are provided on one of the closing plates (3b). They may be provided respectively. Further, although the non-contact type compressor in which a small gap is provided between the cylinder member (4) and the piston (6) has been described, the present invention is not limited to this, and the present invention is not limited to this. May be applied to a contact type compressor in which a small gap is not formed.

[0049]

According to the present invention, when a working fluid is filled in a casing of one of the closing plates, the vibrating compressor provided with a cylindrical casing comprising a cylindrical body and a closing plate. Since a charge port opened by a charge jig attached to one of the closing plates is provided, and a current introducing terminal is provided on the other closing plate or the cylindrical body, a conventional charge jig mounting seat is required. The charging jig can be attached to the casing without performing. For this reason, it is possible to reduce the size and weight of the compressor as a whole, and to reduce the installation space and the required supporting strength for the compressor when the compressor is installed at a predetermined installation position. .

According to the first, third or fifth aspect of the present invention,
For example, by realizing the configuration of the driving means, the practicality of the compressor can be improved.

According to the second, fourth or fifth aspect of the present invention,
For example, it is possible to specifically obtain the configuration of the charging jig used when filling the casing with the working fluid and the operation of charging the working fluid by the charging jig, thereby also improving the practicality of the compressor. Can be planned.

According to the first, second or fifth aspect of the present invention,
For example, two current blocking terminals are provided on the other closing plate,
One current introduction terminal is connected to one end of the coil of both driving means, and the other current introduction terminal is connected to the other end of the coil of both driving means, and each coil is connected in parallel inside the casing. Therefore, by simply connecting the current introduction terminal to the power supply, each coil can be connected in parallel to the power supply, avoiding incorrect wiring connections, and preventing damage to the compressor due to this incorrect wiring. Reliability can be improved.

According to the third, fourth or fifth aspect of the present invention,
In this case, the current blocking terminals are provided at four places on the other closing plate,
Since the two current introduction terminals were connected to both ends of the coil of one driving means, and the remaining two current introduction terminals were connected to both ends of the coil of the other driving means, the respective coils were connected in parallel outside the casing. To be connected in series or connected in series, and each coil can be connected in series as needed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an internal structure of a vibrating compressor according to an embodiment.

FIG. 2 is a diagram showing a state in which a charge jig is attached to a closing plate.

FIG. 3 is a sectional view showing a state in which a charge jig is attached to a closing plate.

FIG. 4 is a sectional view showing a modification of the charge jig.

FIG. 5 is a cross-sectional view showing a modification of the sealing bolt.

FIG. 6 is a circuit diagram showing a modification of the current introduction terminal.

FIG. 7 is a view corresponding to FIG. 1 showing a conventional linear motor compressor.

FIG. 8 is a diagram corresponding to FIG. 2 in a conventional example.

FIG. 9 is a diagram corresponding to FIG. 3 in a conventional example.

[Explanation of symbols]

 (1) Compressor (3) Casing (3a) Cylindrical body (3b) Closure plate (4) Cylinder member (4d) Recess (6) Piston (7) Compression chamber (10) Linear motor (drive means) (11) Permanent magnet (12) Coil (13) Bobbin (14) Spring (elastic means) (18) Charge port (19) Current introduction terminal (20) Sealing bolt (25) Charge jig (26) Body case (body part) (27) Operation rod (28) Charge pipe (A) Internal space of main body case

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-50-37011 (JP, A) JP-A-5-133632 (JP, A) JP-A-6-174193 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) F25B 9/14 520 F25B 9/00

Claims (5)

(57) [Claims] 1. A cylinder (3a) and both ends of the cylinder (3a) are closed.
Casing consisting of a flat closing plate (3b, 3b) to be closed
(3) and A cylinder member (4) disposed in the casing (3); The inside of the cylinder member (4) is opposed to the cylinder member (4).
Are arranged so that relative reciprocation is possible.
A pair of pistons forming a compression chamber (7) with the cylinder member (4).
Tons (6,6) and Each piston (6, 6) reciprocates with respect to the casing (3).
Elastic means (14, 14) for movably elastically supporting; The pistons (6, 6) are provided so as to correspond to the respective pistons.
The stones (6, 6) are moved toward and away from each other in the cylinder member (4).
A plurality of driving means (10, 10) for reciprocating Introducing a plurality of currents for supplying a current to each of the driving means (10, 10)
Terminals (19, 19), By supplying a current to each of the driving means (10, 10),
Move each piston (6,6) relative to the cylinder member (4).
Vibration type that reciprocates and compresses the working fluid in the compression chamber (7)
In the compressor, The driving means (10) is Depressed portion on the outer peripheral side of compression chamber (7) in cylinder member (4)
(4d), and the cylinder member (4) is used as a yoke.
A magnet (11) forming a magnetic circuit, A circle connected to the piston (6) and extending into the recess (4d)
With a cylindrical bobbin (13), It is provided on the bobbin (13) and located in the magnetic field of the magnetic circuit.
To the magnet (11) so that
And a coil (12) to which current is supplied from the child (19, 19).
Consisting of By supplying current to the coil (12), the piston
(6) is reciprocated relative to the cylinder member (4)
The working fluid is configured to be compressed in the compression chamber (7), and
One of the closing plates (3b) is filled with working fluid in the casing (3).
When filling, Charging attached to one obstruction plate (3b)
There is a charge port (18) opened by the jig (25).
It has been Current introduction terminals (19, 19) are provided at two places on the other closing plate (3b).
Can be One current introduction terminal (19) is the coil of both driving means (10, 10)
(12,12) at one end and the other current introduction terminal (19)
Are connected to the other ends of the coils (12, 12) of both drive means (10, 10).
A vibrating compressor characterized by being connected to each other. 2. A cylindrical body (3a) and both ends of the cylindrical body (3a) are closed.
Casing consisting of a flat closing plate (3b, 3b) to be closed
(3) and A cylinder member (4) disposed in the casing (3); The inside of the cylinder member (4) is opposed to the cylinder member (4).
Are arranged so that relative reciprocation is possible.
A pair of pistons forming a compression chamber (7) with the cylinder member (4).
Tons (6,6) and Each piston (6, 6) reciprocates with respect to the casing (3).
Elastic means (14, 14) for movably elastically supporting; The pistons (6, 6) are provided so as to correspond to the respective pistons.
The stones (6, 6) are moved toward and away from each other in the cylinder member (4).
A plurality of driving means (10, 10) for reciprocating Introducing a plurality of currents for supplying a current to each of the driving means (10, 10)
Terminals (19, 19), By supplying a current to each of the driving means (10, 10),
Move each piston (6,6) relative to the cylinder member (4).
Vibration type that reciprocates and compresses the working fluid in the compression chamber (7)
In the compressor, The working flow flows into the casing (3) on the one closing plate (3b).
When filling the body, a chip attached to the one closing plate (3b) is used.
Charge port (18) opened by large jig (25)
Is provided, The charging port (18) is provided with a sealing bolt (20) that can be freely opened and closed.
Has been worn, The charge jig (25) Position the sealing bolt (20) in the internal space (A)
A main body (26) airtightly attached to the closing plate (3b) of The sealing bolt (20) is supported by the main body (26) and can be operated.
And charge po Operation rod (27) that opens and closes (18)
When, The inner space (A) of the main body (26) communicates with the inner space (A).
(A) to the internal space of the casing (3)
A charge pipe (28) for discharging and introducing
And The main body (26) is attached to one closing plate (3b),
Charged by operating sealing bolt (20) with rod (27)
Open the port (18) and open the case from the charging pipe (28).
Fluid is discharged and introduced into the internal space of
So that Current introduction terminals (19, 19) at two places on the other closing plate (3b)
Is provided, One current introduction terminal (19) is the coil of both driving means (10, 10)
(12,12) at one end and the other current introduction terminal (19)
Are connected to the other ends of the coils (12, 12) of both drive means (10, 10).
A vibrating compressor characterized by being connected to each other. 3. The cylindrical body (3a) and both ends of the cylindrical body (3a) are closed.
Casing consisting of a flat closing plate (3b, 3b) to be closed
(3) and A cylinder member (4) disposed in the casing (3); The inside of the cylinder member (4) is opposed to the cylinder member (4).
Are arranged so that relative reciprocation is possible.
A pair of pistons forming a compression chamber (7) with the cylinder member (4).
Tons (6,6) and Each piston (6, 6) reciprocates with respect to the casing (3).
Elastic means (14, 14) for movably elastically supporting; The pistons (6, 6) are provided so as to correspond to the respective pistons.
The stones (6, 6) are moved toward and away from each other in the cylinder member (4).
A plurality of driving means (10, 10) for reciprocating Introducing a plurality of currents for supplying a current to each of the driving means (10, 10)
Terminals (19, 19), By supplying a current to each of the driving means (10, 10),
Move each piston (6,6) relative to the cylinder member (4).
Vibration type that reciprocates and compresses the working fluid in the compression chamber (7)
In the compressor, The driving means (10) is Depressed portion on the outer peripheral side of compression chamber (7) in cylinder member (4)
(4d) Cylinder member (4) as yoke
A magnet (11) forming a magnetic circuit, A circle connected to the piston (6) and extending into the recess (4d)
With a cylindrical bobbin (13), It is provided on the bobbin (13) and located in the magnetic field of the magnetic circuit.
To the magnet (11) so that
And a coil (12) to which current is supplied from the child (19, 19).
Consisting of By supplying current to the coil (12), the piston
(6) is reciprocated relative to the cylinder member (4)
The working fluid is configured to be compressed in the compression chamber (7), and
One of the closing plates (3b) is filled with working fluid in the casing (3).
When filling, the charcoal attached to the one closing plate (3b)
There is a charge port (18) opened by the jig (25).
It has been Current introduction terminals (19, 19,…) are provided at four places on the other closing plate (3b).
Is provided, Two current introduction terminals (19,19) are connected to one drive means (10).
On both ends of the coil (12) and the remaining two current introduction terminals (19,
19) are connected to both ends of the coil (12) of the other drive means (10).
A vibratory compressor characterized by being connected. 4. A cylindrical body (3a) and both ends of the cylindrical body (3a) are closed.
Casing consisting of a flat closing plate (3b, 3b) to be closed
(3) and A cylinder member (4) disposed in the casing (3); The inside of the cylinder member (4) is opposed to the cylinder member (4).
Are arranged so that relative reciprocation is possible.
A pair of pistons forming a compression chamber (7) with the cylinder member (4).
Tons (6,6) and Each piston (6, 6) reciprocates with respect to the casing (3).
Elastic means (14, 14) for movably elastically supporting; The pistons (6, 6) are provided so as to correspond to the respective pistons.
The stones (6, 6) are moved toward and away from each other in the cylinder member (4).
A plurality of driving means (10, 10) for reciprocating Introducing a plurality of currents for supplying a current to each of the driving means (10, 10)
Terminals (19, 19), By supplying a current to each of the driving means (10, 10),
Move each piston (6,6) relative to the cylinder member (4).
Reciprocatingly compresses the working fluid in the compression chamber (7) Vibration type
In the compressor, The working flow flows into the casing (3) on the one closing plate (3b).
When filling the body, a chip attached to the one closing plate (3b) is used.
Charge port (18) opened by large jig (25)
Is provided, The charging port (18) is provided with a sealing bolt (20) that can be freely opened and closed.
Has been worn, The charge jig (25) Position the sealing bolt (20) in the internal space (A)
A main body (26) airtightly attached to the closing plate (3b) of The sealing bolt (20) is supported by the main body (26) and can be operated.
Operation rod (27) that opens and closes the charge port (18) with
When, The inner space (A) of the main body (26) communicates with the inner space (A).
(A) to the internal space of the casing (3)
A charge pipe (28) for discharging and introducing
And The main body (26) is attached to one closing plate (3b),
Charged by operating sealing bolt (20) with rod (27)
Open the port (18) and open the case from the charging pipe (28).
Fluid is discharged and introduced into the internal space of
So that The current introduction terminals (19, 19, 19) are provided at four places on the other closing plate (3b).
…) Two current introduction terminals (19,19) are connected to one drive means (10).
On both ends of the coil (12) and the remaining two current introduction terminals (19,
19) are connected to both ends of the coil (12) of the other drive means (10).
A vibratory compressor characterized by being connected. 5. The charging port (18) has a sealing bolt (20).
Is attached to open and close freely, The charge jig (25) Position the sealing bolt (20) in the internal space (A)
A main body (26) airtightly attached to the closing plate (3b) of The sealing bolt (20) is supported by the main body (26) and can be operated.
Operation rod (27) that opens and closes the charge port (18) with
When, The inner space (A) of the main body (26) communicates with the inner space (A).
(A) through the casing Fluid flows into the internal space of (3).
A charge pipe (28) for discharging and introducing
And The main body (26) is attached to one closing plate (3b),
Charged by operating sealing bolt (20) with rod (27)
Open the port (18) and open the case from the charging pipe (28).
Fluid is discharged and introduced into the internal space of
4. The method as claimed in claim 1, wherein:
The vibratory compressor as described.