JPH0118854Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibratory compressor for compressing refrigerant, which is suitably used as a compressor for a refrigerator for home use or in a vehicle, and is driven by AC power.

First, a conventional vibrating compressor of this type will be explained with reference to FIG. 1. A compressor body 2 is floatingly supported within a container 1 by springs 3 and 4. The casing 5 of the compressor main body 2 is constructed by integrally tightening a bottomed cylindrical yoke 6, a cylindrical intervening member 7, and a basically thick disk-shaped cylinder block 8 with bolts 9. A pole core 10 is fixed to the bottom of the yoke 6, and a ring-shaped permanent magnet 12 is mounted on the inner surface of the yoke 6, facing a ring-shaped pole piece 11 that is integrally provided at the free end of the pole core 10.
is fixed. A drive coil 13 is disposed in the annular gap between the permanent magnet 12 and the pole piece 11, and a hollow piston 14 that is substantially integral with the drive coil 13 is slidable in the cylinder portion 15 of the cylinder block 8. It is loosely fitted into. Further, the piston 14 is supported by a pair of upper and lower resonance springs 16 and 17, and a suction valve 18 is provided at the lower end of the piston 14.
will be equipped.

A cap-shaped lid 19 is fixed to the lower end of the cylinder block 8, and the cap-shaped lid 19 and the cylinder block 8
Accordingly, the discharge valve chamber 21 is located below the cylinder chamber 20.
A high pressure chamber 2 is formed on the side of the cylinder chamber 20 and communicates with the discharge valve chamber 21 through a communication hole 22.
3 is formed. The discharge valve chamber 21 has a cylinder chamber 2.
A discharge valve 25 that can be seated on a valve seat 24 formed at the lower end of the discharge valve 25, and a pressing coil spring 26 of this discharge valve 25.
is stored. In addition, cylinder block 8 has
A refrigerant suction pipe 28 is attached that communicates between the bottom of the container 1 and a refrigerant storage chamber 27 formed inside the compressor body 2, and a discharge pipe 29 that communicates with the high pressure chamber 23 is further provided. This discharge pipe 29 passes through the container 1 and is connected to a condenser of a refrigerator, for example, installed outside the container 1.

In the vibratory compressor configured in this manner, when an alternating current is passed through the drive coil 13, the piston 14 vibrates up and down together with the drive coil 13 depending on the polarity of the alternating current. Moreover, that piston 1
The vertical vibration of 4 is amplified by the upper and lower resonance springs 16 and 17. Due to the amplified vertical vibration of the piston 14, the suction valve 18 and the discharge valve 25 perform a pumping action, and the gaseous refrigerant filling the container 1 first flows into the refrigerant storage chamber 27 via the refrigerant suction pipe 28, and the piston 14, the suction valve 18, the cylinder chamber 20, and the discharge valve 25 to the discharge valve chamber 21.
The liquid flows into the refrigerator and is further discharged through the communication hole 22, the high pressure chamber 23, and the discharge pipe 29 to the condenser of the refrigerator.

By the way, in such a conventional vibrating compressor,
The casing 5 of the compressor body 2 is constructed by integrally tightening a cylinder block 8 with bolts 9 to which a yoke 6, an intervening member 7, and a cap-shaped lid 19 are integrally fixed.The structure is complicated and difficult to assemble. The work is complicated.

It is an object of the present invention to provide a vibratory compressor for compressing refrigerant that solves such conventional technical problems and improves assembly work efficiency by simplifying the casing structure of the compressor main body.

In order to achieve the above object, the present invention forms a refrigerant storage chamber to which a refrigerant suction pipe is connected inside a closed cylindrical casing with both ends closed, and this refrigerant storage chamber is equipped with a permanent magnet. and a pole piece that forms an annular gap between the permanent magnet and the permanent magnet, and a drive coil energized by alternating power is disposed in the gap so as to be movable in the axial direction of the casing. A vibratory compressor for refrigerant compression in which a piston substantially integral with a coil is slidably loosely fitted into a cylinder portion fixedly provided on the casing, wherein the casing has a pair of closing members at both ends of the cylindrical body. Formed by an airtight fit and fixation,
The pole piece is fixed to one closing member, the permanent magnet is fixed to a cylindrical body, and a cylindrical cylinder body for forming the cylinder portion is fitted to the other closing member, A refrigerant suction passage that communicates between the cylinder chamber in the cylinder body and the refrigerant storage chamber only during suction operation of the piston, and a high pressure chamber that can communicate with the cylinder chamber via a discharge valve are formed. It is characterized by being communicated with a discharge pipe.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIG. 2, a vibrating compressor 31 used as a compressor for, for example, a household or car-mounted electric refrigerator is constructed in a vertically long cylindrical sealed container as shown in the figure. The compressor main body 33 is inserted into the spring 34,
35 with floating support. Compressor main body 33
By energizing the drive coil 36 with alternating power within the piston 36, the piston 37 reciprocates up and down integrally with the drive coil 36. The piston 37 is slidably and loosely fitted into the cylinder portion 38, and the reciprocating movement of the piston 37 causes the gaseous refrigerator refrigerant filling the container 32 to flow into the cylinder chamber 38.
9 and is further discharged to a condenser of a refrigerator installed outside the container 32 via a discharge valve 40, a high pressure chamber 41, and a discharge pipe 42. Such operation is basically the same as the conventional one, and the structure different from the conventional one will be explained in detail below.

The casing 43 of the compressor main body 33 has a pair of closing members 45 and 46 at both ends of a cylindrical body 44 extending vertically.
It is constructed by fitting and fixing. That is, the cylindrical body 44
A closing member 45 is integrally provided with a protrusion 47 basically shaped like a thick disk and protruding downward at its lower end.
The outer flange 48 of a closing member 46, which is basically cylindrical and integrally provided with an outer flange 48 at the upper end, is fitted and fixed to the upper end of the cylindrical body 44. That is, the thin wall portion 4 is provided at both ends of the cylindrical body 44.
9 and 50 are provided respectively, and projections 51 and 52 protruding from the outer periphery of the closing members 45 and 46 are fitted into these thin parts 49 and 50, and the thin parts 49 and 50 The casing 43 is constructed by caulking and bending as shown. Furthermore, the caulked portions are welded as described above to further ensure the fixation between the closing members 45, 46 and the cylindrical body 44.

In this way, the closing members 45,
Since the casing 43 is configured by fitting and fixing the casing 46, the structure of the casing 43 is extremely simplified, and the efficiency of assembly work is improved.

Inside the casing 43, a permanent magnet 53 is fixed to the inner surface of the cylindrical body 44 in a ring shape. Further, a ring-shaped pole piece 55 is fixedly provided on the closing member 46 so as to form an annular gap 54 with the permanent magnet 53. Note that this pole piece 55 may be integrally molded with the closing member 46.

A drive coil 36 is arranged in the gap 54 so as to be able to reciprocate in the axial direction of the casing 43, that is, in the vertical direction. This drive coil 36 is connected to the support member 57
The supporting member 57 is wound around the casing 4.
It is fixed to a bottomed cylindrical piston 37 concentric with the axis of No. 3. This support member 57 has a basically cylindrical base 58 fixed to the piston 37, and the piston 37 is connected to the piston 37 from the peripheral edge of the base 58 with a gap in the circumferential direction.
and a plurality of support parts 59 extending in opposite directions, and the drive coil 36 is wound around the support parts 59. In this way, the drive coil 36 and the piston 37 are substantially integrated.

A bottomed hole 60 that is concentric with the axis of the piston 37 is formed in the closing member 45 and extends to the protrusion 47, and an undercut stepped portion 61 is formed in the middle of this hole 60. A metal flow material 62 made of, for example, lead or copper is applied to the stepped portion 61 and a cylindrical cylinder body 63 is press-fitted into the hole 60, thereby integrally providing the cylinder portion 38 in the closing member 45. Moreover, a stepped portion 64 with an undercut is formed in the cylinder body 63 in correspondence with the stepped portion 61, and a metal flow material 62 is formed between the stepped portions 61 and 64.
is crushed and flows between the cylinder body 63 and the inner surface of the hole 60, thereby achieving a fixing and sealing effect. A piston 37 is slidably and loosely fitted into such a cylinder portion 38 .

An insulating plate 65 made of an electrically insulating material is in contact with the lower end of the closing member 46, and a supporting member 57
An insulating member 66 is brought into contact with the upper surface of the base 58 at. Between the insulating plate 65 and the insulating member 66,
A resonant coil spring 69 made of a conductive material is interposed between receiving plates 67 and 68 made of a conductive material. Therefore, the receiving plate 67, the resonant coil spring 69, and the receiving plate 68 are electrically connected. Further, an insulating member 70 made of an electrically insulating material is brought into contact with the lower surface of the base 58 of the support member 57, and a receiving plate 71 made of a conductive material is further brought into contact with the lower surface of this insulating member 70. Receiving plate 71 and closing member 4
5, a resonant coil spring 72 made of a conductive material is interposed. Therefore, the receiving plate 71 and the closing member 45 and therefore the casing 43 are electrically connected via the resonant coil spring 72.
The pair of upper and lower resonant coil springs 69 and 72 arranged in this manner amplify the vertical vibration of the drive coil 36. Therefore, even if the electric power for energizing the drive coil 36 is small, the amount of vibration of the piston 37 is large, and the amount of power consumption can be reduced.

In the closing member 45, the cylinder body 6 of the hole 60
A step surface 73 facing upward is formed below the portion into which 3 is inserted, and a support plate 75 having a small hole 74 in the center abuts on this step surface 73.
A hard cylindrical liner 77 is interposed between the step surface 73 and an annular notch 76 formed on the outer periphery of the lower end of the cylinder body 63. That is, when the cylinder body 63 is press-fitted into the hole 60, the liner 7
7 is a support plate 75 and a notch 76 of the cylinder body 63
A clamping pressure is maintained between the As a result, the cylinder chamber 39 is placed below the cylinder chamber 39 in the cylinder body 63.
A discharge valve chamber 78 is formed concentrically with.

The discharge valve chamber 78 accommodates a disc-shaped discharge valve 40 that can sit on a valve seat 79 formed on the lower end surface of the cylinder body 63 facing the discharge valve chamber 78 and is guided by a liner 77 . A pressing coil spring 80 is interposed between the discharge valve 40 and the support plate 75,
The discharge valve 40 is biased by the spring force of the pressing coil spring 80 in the direction of seating on the valve seat 79. Therefore, when the piston 37 descends within the cylinder chamber 39 and the pressure in the cylinder chamber 39 becomes greater than the spring force of the pressing coil spring 80, the discharge valve 40 separates from the valve seat 79 and opens. Fluid in the cylinder chamber 39 is introduced into the discharge valve chamber 78 .

A high pressure chamber 41 partitioned off from a discharge valve chamber 78 by a support plate 75 is formed at the bottom of the hole 60 . Therefore, the fluid discharged from the cylinder chamber 39 into the discharge valve chamber 78 flows into the high pressure chamber 41 through the small hole 74. In this way, the fluid expands when flowing into the high pressure chamber 41 from the small hole 74, thereby reducing noise during discharge. Such a high pressure chamber has been provided in the past, but as in this embodiment, the hole 60 formed in the closing member 45 to form the cylinder portion 38 is further extended, and the support plate 75 having a small hole 74 is formed. By partitioning the discharge valve chamber 78 from the discharge valve chamber 78, the high pressure chamber 41 having a noise reduction effect can be formed very easily.

A discharge hole 81 communicating with the high pressure chamber 41 is obliquely bored in the closing member 45, and this discharge hole 81 is formed in a recess 89 in the end surface 83 of the closing member 45 facing the refrigerant storage chamber 82 formed in the casing 43. It is opened. The casing 4 is located at the open end of the discharge hole 81.
The lower end of a discharge pipe 42 extending upwardly within 3 is connected to the discharge pipe 42 . A recess 84 facing into the casing 43 is formed in the outer flange 48 of the upper closing member 46, and a guide tube 85 is provided passing through the bottom of the recess 84. This guide tube 85 is fixed to the closing member 46 by brazing welding, and by brazing the thin walled portion in this way, the guide tube 85
is securely fixed to the closing member 46. The discharge pipe 42 is inserted through the guide pipe 85 . Guide tube 85
The discharge pipe 42 that protrudes above the casing 43 through the compressor body 33 is connected to a helical pipe 86 that allows slight vibration due to the vertical vibration of the piston 37 of the compressor main body 33. The upper part of the spiral tube 86 is inserted into a take-out pipe 87 attached to the upper end of the container 32, brazed and welded, and then pulled out of the container 32 and connected to a condenser of a refrigerator or the like.

A circular recess 89 is formed in the center of the end surface 83 of the lower closing member 45, excluding the part where the cylinder body 63 is fitted and forms the cylinder part 38. A recess 90 is formed, and a suction tube 91 is provided through the bottom of this recess 90. A refrigerant suction pipe 91 is provided. The upper part of the suction pipe 91 projects slightly upwards from the bottom of the recess 90, and the lower end of the suction pipe 91 is positioned approximately at the same level as the oil level of the lubricating oil 92 stored in the container 32. Moreover, suction tube 9
1 is fixed to the closing member 45 by brazing welding, and therefore is brazed to the thin wall portion of the closing member 45 in the same way as the guide tube 85 described above, so that it is securely fixed to the closing member 45. be done.

A hole 93 opened laterally is provided on the side of the closing member 45.
is formed, and when the closing member 45 is fitted into the cylindrical body 44, the open end of the hole 93 is connected to the cylindrical body 44.
, thereby forming a suction chamber 94 . Further, a first suction hole 95 of a small diameter is formed in the end surface 83 of the closing member 45 and communicates with the suction chamber 94. Recess 8
It is at a higher level than the bottom of 9. Also, the closing member 4
5 has a small diameter second suction hole 9 communicating with the suction chamber 94.
6 is bored, and this second suction hole 96 is communicated with the cylinder chamber 39 via a communication hole 97 formed in the cylinder body 63. In addition, the communication hole 97 is formed in such a position that it is opened when the piston 37 moves upward in the cylinder chamber 39, and is closed by the side surface of the piston 37 when the piston 37 descends.

In this way, the fluid in the refrigerant storage chamber 82 is
Although the fluid is sucked into the cylinder chamber 39 through the suction hole 95, the suction chamber 94, the second suction hole 96, and the communication hole 97, the fluid expands when flowing into the suction chamber 94 from the small-diameter first suction hole 95. Noise during inhalation is thereby reduced. Moreover, the suction chamber 94 having such a noise-reducing effect can be formed very easily by simply forming a hole 93 in the side of the closing member 45 and fitting and fixing the closing member 45 into the cylindrical body 44. The first suction hole 95, the suction chamber 94, and the second suction hole 96 cooperate with each other to form a refrigerant suction passage P that communicates between the cylinder chamber 39 and the refrigerant storage chamber 82 only during the suction operation of the piston 37. Configure.

A through hole 98 for supplying alternating power to the drive coil 36 is bored in the center of the upper closing member 46, and a circular bent edge 99 is provided in the middle of the through hole 98. A step surface 100 facing downward is formed. That is, the inner diameter of the through hole 98 is made larger below the stepped surface 100 than above. The electrical connection member 101 is inserted and fixed into the through hole 98 . This electrical connection member 101 includes a metal holding frame 104 consisting of a cylindrical portion 102 and a conical portion 103, and a non-conductive material such as a glass body 105.
The rod-shaped terminal 106 is held concentrically through the terminal.

The electrical connection member 101 has a cylindrical insulator 10 made of an electrically insulating material between the outer peripheral surface of the cylindrical portion 102 and the inner surface of the through hole 98 in the holding frame 104.
7 is inserted into the through hole 98 with the holding frame 1
The outer surface of the conical portion 103 in 04 is the step surface 100
It is in line contact with the bent edge 99 over the entire circumference. By creating a potential difference between the holding frame 104 and the closing member 46 in this state, projection welding is performed at the line contact portion at the bent edge 99 between the holding frame 104 and the closing member 46, and the electrical connection member 101 is fixed to the closing member 46. At this time, the inner surface of the through hole 98 and the cylindrical portion 102 of the holding frame 104 are close to each other, but since the insulator 107 is interposed between them, projection welding at the line contact portion is ensured. It is done.

One end of the rod-shaped terminal 106 of the electrical connection member 101 fixed to the closing member 46 in this manner is inserted and connected to the cylindrical terminal 108 fixed to the receiving plate 67 through the insulating plate 65. Therefore, the rod-shaped terminal 106 is electrically connected to the resonant coil spring 69. Further, the receiving plate 68 is connected to the drive coil 3.
6, and the other end of the drive coil 36 is connected to the receiving plate 71. One end of a lead wire 109 is connected to the other end of the rod-shaped terminal 106, and the other end of this lead wire 109 is fitted into a hole 110 formed in the upper end of the container 32, and is connected to the electrical connection member 10 described above.
It is connected to one end of the rod-shaped terminal 112 of the electrical connection member 111 fixed by projection welding in the same manner as in 1. The other end of the rod-shaped terminal 112 is connected to a connecting terminal 115 fixed to the upper end of the container 32 via a series circuit consisting of an AC power source 113 and a switch 114.

In this way, the AC power supply 113, the rod-shaped terminal 1
12, lead wire 109, rod-shaped terminal 106, cylindrical terminal 108, receiving plate 67, resonant coil spring 69,
Reception plate 68, drive coil 36, reception plate 71, resonance coil spring 72, casing 43, springs 34, 3
5. A closed circuit is constituted by the connection terminal 115 and the switch 114, and when the switch 114 is made conductive, an alternating current flows through the closed circuit and the drive coil 36 is energized.

An introduction pipe 116 is connected to the upper end of the container 32, and a fluid to be pressurized is introduced into the container 32 from this introduction pipe 116.

Next, the operation of this embodiment will be explained. When the switch 114 is turned on and the drive coil 36 is energized with alternating power, the magnetic field generated in the gap 54 applies a force to the drive coil 36 to vibrate up and down. The vibrations are amplified by the resonant coil springs 69 and 72 and transmitted to the piston 37.
reciprocates up and down within the cylinder chamber 39. As a result, the fluid introduced into the container 32 is sucked into the refrigerant storage chamber 82 within the casing 43 via the refrigerant suction pipe 91. At this time, the fluid is
When rising, lubricating oil 92 is drawn in and turned into droplets,
The refrigerant is blown up into the refrigerant storage chamber 82. Therefore, fine particles of lubricating oil are scattered in the refrigerant storage chamber 82, and these fine particles adhere to the piston 37, thereby achieving a lubricating effect between the piston 37 and the cylinder portion 38.

The fluid introduced into the refrigerant storage chamber 82 is sucked into the suction chamber 94 through the first suction hole 95, and at this time, the suction noise is reduced due to the expansion of the fluid in the suction chamber 94. Furthermore, although lubricating oil should be avoided as much as possible from being introduced into the suction chamber 94, the opening end of the first suction hole 95 to the refrigerant storage chamber 82 should be lower than the bottom surface of the refrigerant storage chamber 82, that is, the bottom surface of the recess 89. Since the lubricating oil is at a high level and does not accumulate on the end face 83,
Introducing lubricating oil into the suction chamber 94 is prevented as much as possible.

The fluid introduced into the suction chamber 94 is guided to the cylinder chamber 39 through the second suction hole 96 and the communication hole 97, and is discharged into the discharge valve chamber 78 when the discharge valve 40 is opened. Furthermore, the fluid is discharged from the discharge valve chamber 78
The gas is introduced into the high-pressure chamber 41 through the small hole 74, but at this time, the discharge noise is reduced by the expansion action, and it is discharged through the discharge hole 81, the discharge pipe 42, and the spiral pipe 86.

As described above, according to the present invention, the refrigerant storage chamber 82 to which the refrigerant suction pipe 91 is connected is formed inside the closed cylindrical casing 43 with both ends closed, and the refrigerant storage chamber 82 includes: Permanent magnet 53 and
A pole piece 55 is fixedly provided to form an annular gap 54 between the permanent magnet 53 and the drive coil 3 energized by alternating power.
6 is arranged to be movable in the axial direction of the casing 43, and a piston 37 is substantially integral with the coil 36.
In the vibratory compressor for compressing refrigerant, the casing 43 has a pair of closing members 45 and 46 at both ends of a cylindrical body 44. The pole piece 55 is formed to be airtightly fitted and fixed.
is attached to one of the closing members 46 and the permanent magnet 53
are respectively fixed to the cylindrical body 44, and a cylindrical cylinder body 63 for forming the cylinder portion 38 is fitted into the other closing member 45, and the cylinder chamber 39 in the cylinder body 63 and A refrigerant suction passage P that communicates with the refrigerant storage chamber 82 only during the suction operation of the piston 37, and a high pressure chamber 41 that can communicate with the cylinder chamber 39 via a discharge valve 40 are formed. Since it is connected to the discharge pipe 42, the closed cylindrical casing 43 of the vibratory compressor for refrigerant compression is connected to the pole piece 55.
One closing member 46 holding the permanent magnet 53
The cylinder body 44 that holds the cylinder body 63, and the other closing member 45 in which the refrigerant suction passage P and the high pressure chamber 41 are formed are formed. The casing 43 can be easily assembled by simply fitting and fixing the closing members 45 and 46 to both ends of the casing 44, and therefore the structure of the casing 43 in this type of vibratory compressor for refrigerant compression is extremely simplified. Assembly work efficiency is also improved. Moreover, the internal space of the casing 43 can be effectively used as a wide refrigerant storage chamber 82, as before.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a conventional vibratory compressor, and FIG. 2 is a longitudinal sectional view of a vibratory compressor according to an embodiment of the present invention. 31... Vibration compressor, 36... Drive coil, 3
7... Piston, 38... Cylinder section, 43...
Casing, 44...Cylindrical body, 45, 46...Closing member, 53...Permanent magnet, 54...Gap, 55
...Pole piece, 63...Cylinder body, 82...
...refrigerant storage chamber, 91...refrigerant suction pipe, P...refrigerant suction passage.

Claims (1)

[Scope of utility model registration request] Closed cylindrical casing 4 with both ends closed
A refrigerant storage chamber 82 to which a refrigerant suction pipe 91 is connected is formed inside the refrigerant storage chamber 3 , and a permanent magnet 53 and a pole forming an annular gap 54 between the permanent magnet 53 are formed in the refrigerant storage chamber 82 . piece 55 is fixedly provided, a drive coil 36 energized by alternating power is disposed in the gap 54 so as to be movable in the axial direction of the casing 43, and a piston 37 substantially integral with the coil 36 is provided in the gap 54. In a vibratory compressor for refrigerant compression that is slidably and loosely fitted into a cylinder portion 38 fixedly provided on a casing 43, the casing 43 has a pair of closing members 4 at both ends of a cylindrical body 44.
The pole piece 55 is fixed to one of the closing members 46, the permanent magnet 53 is fixed to the cylindrical body 44, and the other closing member 45 has: Cylindrical cylinder body 63 for forming the cylinder portion 38
is fitted, and a refrigerant suction passage P that communicates between the cylinder chamber 39 in the cylinder body 63 and the refrigerant storage chamber 82 only during the suction operation of the piston 37, and a discharge valve 40 in the cylinder chamber 39 are provided. A vibratory compressor for compressing refrigerant, characterized in that a high pressure chamber 41 is formed which can be communicated through a discharge pipe 42.