JPH08331805A - Vibrating type compressor - Google Patents

Abstract

PURPOSE: To secure a cable way by not using any lead wire, but a mechanical component. CONSTITUTION: A vibrating type compressor 1 which generates a high-pressure gas by making a piston 45 reciprocate while the piston 45 is supported by resonant springs 20 and 21 is provided with a conductive seat terminal 51 which is brought into face-contact with the end section of the spring 21, an insulation base 50 between a hermetic seal terminal 53 provided on the lid body 42 of the compressor 1 and the seat terminal 51, and a connecting mechanism which electrically and mechanically connects and fixes the center terminal 54 of the hermetic seal terminal 53 to the seat terminal 51.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a mechanical component in an internal structure of a vibration type compressor, in particular, a vibration type compressor without using a lead wire which is liable to cause a contact failure, a disconnection or the like due to its structure. The present invention relates to a vibration type compressor that secures an electric path.

[0002]

2. Description of the Related Art Conventionally, a vibration type compressor used as a compressor for a vehicle-mounted refrigerator, for example, has a structure as shown in FIG.

Referring to FIG. 1, a vibration type compressor 1 includes a cylinder 2
a and a lid plate 2b for closing both open ends of the cylinder 2a,
A compressor body 3 is elastically supported by springs 4 and 5 in a cylindrical hermetic container 2 constituted by 2c.

The casing 6 of the compressor body 3 has a cylindrical portion 7
The cylinder 8 is fixed to one end, that is, the upper end of a, and the other end, that is, the lower end of the pot-shaped bottom 7b. The bottom 7b is formed by turning, for example, the cylindrical portion 7a.
The stepped portion 7c perpendicularly intersecting the inner peripheral surface and the fitting portion 7d fitted to the inner peripheral surface are formed.
Then, as shown in the drawing, the fitting portion 7d is connected to the cylindrical portion 7d.
The yoke 7 is configured by fixing (for example, welding) the bottom 7b and the cylindrical portion 7a so as to be fitted to the inner peripheral surface of a.

The cylinder 8 is fitted on the lower end of the yoke 7. And on the inner peripheral surface of the lower end side of the yoke 7,
A mounting plate 9 formed by cutting out a part of a ring-shaped disc is mounted, and a plurality of screw members 10 penetrating the cylinder 8 are screwed into the mounting plate 9 and tightened. The cylinder 8 is fixed to the lower end of the yoke 7.

An arc-shaped permanent magnet 11 is fixed inside the casing 6 so as to abut the inner peripheral surface of the yoke 7 and the step portion 7c. Further, a pole piece 13 for forming an annular gap 14 with the permanent magnet 11 is provided on the bottom 7b via a permanent magnet (alnico magnet) 12,
For example, it is fixed by a screw member 15.

A drive coil 16 is arranged in the gap 14 so as to be reciprocally movable in the axial direction of the casing 6, that is, in the vertical direction. The drive coil 16 is fixed to a support member 17, and the support member 17 is substantially integrated with the shaft of the casing 6 and a piston 18 which is a concentric cylinder. The piston 18 is slidably fitted into a cylinder portion 19 integrally formed with the piston 18 so as to project into the casing 6.

A resonance spring 20 is interposed between the pole piece 13 and the support member 17, and a resonance spring 21 is also interposed between the support member 17 and the terminal 34d on the cylinder 8. Therefore, the piston 18 is supported by the pair of upper and lower resonance springs 20 and 21. Further, a suction valve 22 is installed at the lower end of the piston 18.

A cap-like lid 23 is fixed to the lower end of the cylinder 8 by, for example, a bolt (not shown). This cap 2
A discharge valve chamber 25 is provided between the cylinder 3 and the cylinder 8 below the cylinder chamber 24 located below the piston 18 in the cylinder portion 19.
The high-pressure chamber 26 and the low-pressure chamber 27 are formed by closing the hole provided in 8 with the cap 23.

Further, the cap-like lid 23 is provided with a communication passage 28 which communicates between the discharge valve chamber 25 and the high pressure chamber 26.
Further, a discharge pipe 29 communicating with the high pressure chamber 26 is provided,
The discharge pipe 29 penetrates the cover plate 2c and is drawn out to the outside to be discharged to, for example, a condenser of a refrigerator (not shown). That is, the high-pressure refrigerant compressed by the compressor body 3 is discharged to the condenser.

The high-pressure refrigerant passes through a condenser, a capillary tube, and an evaporator to become a low-pressure refrigerant, and a suction pipe 30a penetrating the cover plate 2c and a cap-shaped lid 23 are communicated with the low-pressure chamber 27. The casing 6, that is, the compressor body 3 is connected via the pipe 30b and the suction pipe 30c that communicates the low pressure chamber 27 with the inside of the casing 6.
Be introduced inside.

In the discharge valve chamber 25, a discharge valve 32 which can be seated on a valve seat 31 provided on the cylinder 8 at the lower end of the cylinder chamber 24, and a biasing force of the discharge valve 32 in a direction for seating the discharge valve 32 on the valve seat 31. And a pressing spring 33 that operates.

A power supply terminal 34a is attached to the cover plate 2c. Then, the power supply terminal 34a and the resonance spring 2
There are provided connection members 34b, 34c, 34d for connecting to 1. The drive coil 16 and the resonance spring 21 are connected by a lead wire 35a, and the drive coil 16 and the resonance spring 20 are connected by a lead wire 35b.

Therefore, one end of the drive coil 16 is connected to the lead wire 35a, the resonance spring 21, and the connecting members 34d and 34.
connected to the power supply terminal 34a via the terminals c and 34b, and the other end connected to the closed container 2 via the lead wire 35b, the resonance spring 20, the pole piece 13, the screw member 15, the bottom 7b, and the spring 4. There is. That is, the power supply terminal 3
By applying an alternating voltage between 4a and the closed container 2, it is possible to supply an alternating current to the drive coil 16.

Further, on the bottom 7b and the cap-like lid 23, at a position corresponding to the protrusions 7b 'and 23', a buffer member 36 formed in a ring shape by an elastic body such as rubber.
And 37 are provided. Therefore, it is possible to suppress undesired swinging of the compressor body 3 to a minimum range by the buffer members 36 and 37.

With such a structure, when an alternating current is passed through the drive coil 16, the piston 18 vibrates up and down together with the drive coil 16 depending on the polarity of the alternating current. The vertical vibration of the piston 18 is amplified by the pair of upper and lower resonance springs 20 and 21. The suction valve 22 and the discharge valve 32 are caused by the amplified vertical vibration of the piston 18.
In other words, it performs a pumping action, and the fluid introduced into the closed container 2 by the pumping action is a suction pipe 30.
a, 30b, the low pressure chamber 27, and the suction pipe 30c to flow into the inside of the casing 6, and the piston 18 and the cylinder chamber 24
Then, the gas flows into the discharge valve chamber 25 through the discharge valve 32 and is further discharged to the condenser of the refrigerator through the communication passage 28, the high pressure chamber 26 and the discharge pipe 29.

[0017]

In the conventional vibration type compressor, as described above, the material connecting portion 34b of the lead wire is used between the power supply terminal 34a and the resonance spring 21 forming the electric path. There is a defect that the material connecting portion 34b of the lead wire is broken by vibration or causes poor contact. Further, since the compressor body 3 has a double hermetically sealed structure housed in the hermetic container 2, there is a drawback that the electric path from the power supply terminal 34a to the resonance spring 21 becomes complicated.

The present invention is intended to solve the above-mentioned drawbacks, and in a vibration type compressor having a caseless structure, mechanical components can be provided without using a lead wire which is apt to cause contact failure, disconnection, etc. structurally. It is an object of the present invention to provide a vibration type compressor that secures an electric path by using the vibration type compressor.

[0019]

In order to solve the above-mentioned problems, a vibration type compressor of the present invention has a structure in which a piston is supported by a resonance spring and a high pressure gas is generated by the reciprocating motion of the piston. In the machine, a conductive seat terminal that makes surface contact with the end of the resonance spring, an insulation base provided between the hermetic seal terminal provided on the lid of the vibration type compressor and the seat terminal, A connecting mechanism for connecting and fixing the center terminal of the hermetic seal terminal to the seat terminal is provided.
It is characterized by the cordless construction of the circuit. A push nut type connection mechanism is used as a connection mechanism between the center terminal and the seat terminal of the hermetic seal terminal.

[0020]

[Function] The seat terminal electrically connected to the resonance spring forming the electric circuit is the center terminal of the hermetically sealed terminal provided on the lid and the push nut type connection mechanism provided on the seat terminal. By being electrically and mechanically connected and fixed, an electric path can be secured without using a lead wire.

[0021]

1 is a sectional view showing the construction of an embodiment of a vibration type compressor to which the present invention is applied.

In the figure, the vibration type compressor 1 according to the present invention has a structure without a case, unlike the conventional double hermetic structure shown in FIG. 6, in which one is an open end and the other is an open end. The closed container 2 is composed of a bottomed double-cylindrical housing 40 and cap-shaped lids 41 and 42 attached to both ends of the housing 40 to keep airtightness. The outer cylinder 40a and the inner cylinder 40b are integrally formed in the housing 40, but the housing 40 does not necessarily have to be integrally formed, and may be integrally formed by fixing.

The outer cylinder 40a of the housing 40 forms a yoke and also serves as a casing, and the arc-shaped permanent magnet 11 is fixed to its inner peripheral surface. A cylinder 43 is provided in the center of the inner cylinder 40b in the axial direction, and the cylinder 43 is fixed to the inner cylinder 40b with a plurality of screws 44.

A cylindrical piston 45 is fitted inside the cylinder 43, and one end of the piston 45 is fixed to a cylindrical portion 46c formed on a flange portion 46a of the bobbin 46. A drive coil 16 is wound around the bobbin 46, and the drive coil 16 is arranged at a spatial position between the magnet 11 and the outer peripheral surface of the inner cylinder 40b.
Are configured to reciprocate up and down substantially integrally with the reciprocating motion of the piston 45.

As shown in FIGS. 4 and 5, the bobbin 46 has four coil yoke pieces 46b, a flange portion 46a that bundles the coil yoke pieces 46b, and one end of the piston 45 connected to the flange portion 46a. The drive coil 16 is wound so that it is provided with a cylindrical portion 46c to be fixed and is supported by four coil yoke pieces 46b.

An insulating member 47 is attached to the flange portion 46a of the bobbin 46, and a terminal 48 of a conductive material provided on the surface of the insulating member 47 is mounted. The winding start end of the drive coil 16 wound around the coil yoke piece 46b is connected to any one of the coil yoke pieces 46b, and the winding end end thereof is connected to the terminal of the terminal 48.

The resonance spring 20 is interposed between the flange portion 46a of the bobbin 46 and the inside of the inner cylinder 40b of the housing 40, and the terminal 48 is provided on the flange portion 46a of the bobbin 46 via an insulating member 47. And the seat terminal 51 installed on the cap-shaped lid 42 via the insulation base 50, the resonance spring 21 is interposed, and each end of the resonance spring 21 has the terminal 48 and the seat terminal 51. And are electrically connected to each other by surface contact. In this way the piston 45
Has a structure supported by a pair of upper and lower resonance springs 20 and 21.

The seat terminal 51, as shown in the front view of the seat terminal of FIG. 2 and its sectional view of FIG.
A plurality of (for example, three) cut-and-raised claws 52 are formed in the central portion of a dish-shaped conductive seat terminal 51,
By the cut-and-raised claws 52, rod-shaped conductors inserted into the plurality (3) of the cut-and-raised claws 52 are electrically and mechanically fixedly connected by a so-called push nut method. The end of the resonance spring 21 comes into surface contact with the dish portion of the seat terminal 51. The claw portion of the dish-shaped seat terminal 51 includes not only the shape of the cut-and-raised claw 52 but also a flat shape, a cylindrical shape, and the like, and as a fixed connection method, welding, soldering, or the like may be added. ..

A convex portion 42a is formed at the center of the cap-shaped lid 42 that closes the opening end of the housing 40, and a hermetic seal terminal 53 is provided on the convex portion 42a. The outer terminal 56 and the lid 42 are electrically connected to each other, and the outer terminal 56 and the center terminal 54 are connected to each other by a glass member 55 which is an insulating member.
Is insulated with. Both ends of the center terminal 54 project from the lid 42, and a conductive seat terminal is provided in the circular recess 42b formed by the protrusion 42a at the center of the lid 42 via the insulation base 50 described above. 51 is provided, and the seat terminal 51 and the center terminal 54 are electrically and mechanically connected and fixed by a push nut method. The suction pipe 30 is attached to the lid 42.

On the other hand, the bottom side of the housing 40 is covered with a cap-shaped lid 41 having a discharge tube 29 and having a convex portion in the central portion to form a space 57. The space formed by the portion forms the discharge valve chamber 58. The discharge valve chamber 58 is provided with a spring 59 that biases the discharge valve 32 disposed at the tip of the cylinder chamber 60 in a direction to press the discharge valve 32. On the cylinder chamber 60 side of the piston 45, the piston head 61 is press-fitted into the piston 45, and the intake valve 22 is arranged between the piston head 61 and the tip of the piston 45.

With such a configuration, when an alternating voltage is applied between the center terminal 54 and the outer terminal 56 of the hermetic seal terminal 53, the center terminal 54, the seat terminal 51, and the resonance spring 2
An alternating current flows through the drive coil 16 through the electric paths of 1, the terminal 48, the drive coil 16, the bobbin 46, the resonance spring 20, the inner cylinder 40b, the outer cylinder 40a, and the outer terminal 56.

As a result, the drive coil 16 arranged in the magnetic field of the permanent magnet 11 vibrates vertically depending on the polarity of the alternating current. The piston 45, which is substantially integrated with the drive coil 16, also reciprocates vertically with the drive coil 16. The vertical reciprocating vibration of the piston 45 is amplified by the pair of upper and lower resonance springs 20 and 21. The amplified reciprocating vibration of the piston 45 causes the suction valve 22 and the discharge valve 32 to perform a pumping action, so that the gas such as the refrigerant introduced into the closed container 2 through the suction pipe 30 by the pumping action is transferred to the piston. 45,
The high-pressure gas such as the refrigerant flows into the discharge valve chamber 58 through the suction valve 22, the cylinder chamber 60 and the discharge valve 32, and is further discharged to the condenser of the refrigerator through the space 57 and the discharge pipe 29.

[0033]

As described above, according to the present invention, the seat terminal is used to electrically and mechanically connect and fix the push nut type connecting mechanism, which may cause contact failure and disconnection against vibration. An electric circuit can be secured without using an easy lead wire. Moreover, the number of parts is small, and the electric circuit can be configured with a structure that is easy to assemble.

[Brief description of drawings]

FIG. 1 is a sectional view of the configuration of an embodiment of a vibration type compressor in which the present invention is used.

FIG. 2 is a front view of a seat terminal.

FIG. 3 is a sectional view thereof.

FIG. 4 is a perspective view of an embodiment of the bobbin.

FIG. 5 is a vertical sectional view of a bobbin.

FIG. 6 is a cross-sectional view of a conventional vibration type compressor.

[Explanation of symbols]

 1 Vibration type compressor 2 Airtight container 16 Drive coil 20,21 Resonance spring 40 Housing 41,42 Lid body 45 Piston 46 Bobbin 50 Insulation base 51 Seat terminal 53 Hermetic seal terminal 54 Center terminal 55 Glass member 56 Outer terminal

Claims (2)

[Claims] 1. A vibration type compressor configured to support a piston by a resonance spring and generate high-pressure gas by reciprocating motion of the piston, wherein an electrically conductive seat terminal is in surface contact with an end of the resonance spring, and a vibration. An insulation base provided between the hermetically sealed terminal provided on the lid of the die-type compressor and the seat terminal, and a connection mechanism for connecting and fixing the center terminal of the hermetically sealed terminal to the seat terminal are provided. The vibration type compressor is characterized in that the electric circuit is configured by. 2. A push nut type connecting mechanism is used as a connecting mechanism between the center terminal and the seat terminal of the hermetic seal terminal, and the center terminal and the seat terminal are electrically and mechanically connected and fixed. The vibration type compressor according to claim 1.