JP4246411B2 - Linear compressor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a linear compressor, and is particularly suitable for a linear compressor used in an air conditioner, a refrigerator, a refrigerator, a cooling device, and the like.
[0002]
[Prior art]
As a conventional vibration type compressor, as disclosed in Japanese Patent Application Laid-Open No. 59-192873, a compressor main body is supported in a pressure accumulator vessel by support springs from both upper and lower sides, and the compressor main body has a cylinder inside. Is provided with a piston which is inserted into the shaft and vibrates in the axial direction, and is provided with a suction pipe and a discharge pipe which are formed in a coil shape and are fixed to the compressor body and the accumulator container.
[0003]
[Problems to be solved by the invention]
However, in the conventional vibration type compressor, since both sides of the suction pipe and the discharge pipe are directly fixed to the compressor main body and the accumulator container, the vibration of the compressor main body passes through the suction pipe and the discharge pipe to the accumulator container. There is a risk that noise and vibration of the accumulator container may be generated, and a large and repeated stress is applied to the suction pipe and the discharge pipe due to vibration of the compressor body, which may cause fatigue failure. Therefore, in order to reduce the vibration transmitted to the pressure accumulator vessel and to reduce the repeated stress, it is conceivable to wind the suction pipe and the discharge pipe in large coils many times, but the storage space for the suction pipe and the discharge pipe However, there is a problem that a large compressor and high cost are caused. In order to reduce the vibration transmitted to the accumulator vessel and reduce the repeated stress, it is conceivable to reduce the diameter of the suction pipe and the discharge pipe, but this leads to an increase in the flow resistance of the suction gas and the discharge gas. The problem of lowering is generated.
[0004]
Moreover, in the conventional vibration type compressor, since the compressor body is only supported by the support springs from the upper and lower sides in the accumulator vessel, the installation posture is limited to the vertical type. That is, if this vibration type compressor is used in, for example, a horizontal type, the position of the compressor body changes downward due to the weight of the compressor body, and excessive stress is applied downward to the support spring, the suction pipe and the discharge pipe. It will be difficult to fully perform these functions.
[0005]
The first object of the present invention is to reduce the repetitive stress applied to the members constituting the suction passage or the discharge passage from the compressor body to the sealed container and to reduce the vibration transmitted from the compressor body to the sealed container. It is to provide a high linear compressor.
[0006]
The second object of the present invention is to reduce the repetitive stress applied to the members constituting the suction passage or the discharge passage from the compressor main body to the sealed container and to reduce the vibration transmitted from the compressor main body to the sealed container. It is providing the linear compressor with a high freedom degree of the installation attitude | position of a compressor, maintaining this.
[0007]
The third object of the present invention is to reduce the repetitive stress applied to the members constituting the suction passage or the discharge passage from the compressor body to the sealed container and to reduce the vibration transmitted from the compressor body to the sealed container. An object of the present invention is to provide a linear compressor having a high degree of freedom in the installation posture of the compressor while maintaining high reliability.
[0008]
[Means for Solving the Problems]
The first feature of the present invention for achieving the first object described above is that in the linear compressor in which the compressor main body including the compression mechanism section and the linear motor section is housed in a sealed container via a support device. The sealed container has a suction passage for sucking gas from the outside and a discharge passage for discharging gas to the outside, and the compression mechanism section reciprocates between the cylinder having a cylinder chamber and the cylinder chamber. The linear motor unit includes a stator and a movable element that reciprocates by connecting the piston, and the support device elastically supports the compressor body from both sides in the reciprocating direction of the piston. And at least one member of the suction passage and the discharge passage includes a suction side or a discharge side passage of the compression mechanism section. So as to communicate is to bound slidably reciprocating direction of the piston in the compressor body.
[0009]
A second feature of the present invention for achieving the second object described above is that the compressor main body including a compression mechanism portion and a linear motor portion is housed in a sealed container via a support device. The sealed container has a suction passage for sucking gas from the outside and a discharge passage for discharging gas to the outside, and the compression mechanism section reciprocates between the cylinder having a cylinder chamber and the cylinder chamber. A piston, and the linear motor unit includes a stator and a movable element that reciprocates by connecting the piston, and the support device includes a support unit on the compressor body side and a support unit on the airtight container side. And a vibration-proof spring that elastically supports the compressor body from both sides in the reciprocating direction of the piston. The suction passage and the discharge aisle At least one member of the constituent members is slidable in the reciprocating direction of the piston in the compressor body so that the suction passage or the discharge passage communicates with the suction side or the discharge side passage of the compression mechanism section. It is in being connected to.
[0010]
According to a third aspect of the present invention for achieving the third object described above, in the linear compressor in which the compressor main body including the compression mechanism unit and the linear motor unit is housed in a sealed container via a support device, The sealed container has a suction passage for sucking gas from the outside and a discharge passage for discharging gas to the outside, and the compression mechanism section reciprocates between the cylinder having a cylinder chamber and the cylinder chamber. And a piston having a suction hole into the cylinder chamber, the linear motor unit includes a stator and a movable element that reciprocates by connecting the piston, and the support device supports the compressor body. And a vibration isolation spring that elastically supports the compressor body from both sides of the piston in the reciprocating direction. Wherein the support member, said suction passage and said discharge passage is formed, in that the suction passage and the discharge passage is provided so as to communicate with the suction side or passage on the discharge side of the compression mechanism.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a longitudinal sectional view of a linear compressor according to an embodiment of the present invention in a vertically placed state, FIG. 2 is a longitudinal sectional view of the compressor in a horizontally placed state, and FIG. 3 is an AA view of FIG. It is arrow sectional drawing.
[0012]
The sealed container 3 includes a cylindrical cylindrical portion 3A having both ends opened, and lid portions 3B and 3C welded to the cylindrical portion 3A so as to seal the both end openings of the cylindrical portion 3A. The lid portions 3B and 3C are composed of a disk-shaped portion and a flange portion, and the flange portion is fitted into the cylindrical portion 3A in the axial direction and welded.
[0013]
The iron support members 1A, 2A have a suction passage 1 and a discharge passage 2 in the center, and are composed of pipe portions 1A1, 2A1, flange portions 1A2, 2A2, and container penetration portions 1A3, 2A3. It is fixed. The flange portions 1A2 and 2A2 are in contact with the inner surfaces of the lid portions 3B and 3C. The pipe portions 1A1 and 2A1 protrude from the center of the flange portions 1A2 and 2A2 coaxially with the cylindrical portion 3A toward the inner center of the sealed container 3. And this pipe part 1A1 has the front-end | tip part so that the suction passage 1 may open and communicate with the space in the airtight container 3. FIG. Further, the pipe portion 1A2 has a tip portion formed so that the discharge passage 2 is open to communicate with the discharge silencer. The container penetrating portions 1A3 and 2A3 extend from the center of the flange portions 1A2 and 2A2 through the center of the lid portions 3B and 3C so as to protrude outward, and the outer periphery thereof is welded so as to be airtight to the lid portions 3B and 3C. It is fixed. A suction pipe 18 is connected to the support member 1 </ b> A so as to communicate with the suction passage 1, and a discharge pipe 19 is connected to the support member 2 </ b> A so as to communicate with the discharge passage 2. In addition, when applying this compressor to a refrigerating cycle, the suction pipe 18 is connected to a cooler, and the discharge pipe 19 is connected to a condenser.
[0014]
A compressor main body 4 is accommodated in the sealed container 3 via a support device. The compressor main body 4 includes a compression mechanism 5 that compresses the gas sucked into the sealed container 3, a linear motor unit 6 that drives the compression mechanism 5, and a mover 6 </ b> B of the linear motor unit 6. The spring 7A, 7B, an iron spring pressing member 15 that supports the spring 7B, and the like. The spring retainer member 15 has a through hole 15a formed at the central portion thereof coaxially with the cylindrical portion 3A, and the pipe portion 1A1 of the support member 1A is inserted into the through hole 15a and is slid with respect to the pipe portion 1A1. It is possible to move. The spring pressing member 15 and the supporting member 1 </ b> A constitute a part of a supporting device for the compressor body 4.
[0015]
The compression mechanism portion 5 has a cylinder 8 having a cylindrical cylinder chamber coaxially with the cylindrical portion 3A in the center, an end slidable in the cylinder chamber, and a suction hole 9a provided through the center. A piston 9, a suction valve 10 provided to open and close the suction hole 9 a on the cylinder chamber side end surface of the piston 9, a discharge valve 11 provided to open and close the discharge side of the cylinder chamber of the cylinder 8, and the cylinder 8 The head 16 and the head cover 17 are fixed to the discharge valve side by bolts 22. The compression chamber 12 is formed by a cylinder chamber located between the suction valve 10 and the discharge valve 11. A discharge silencer is formed on the discharge side end face of the cylinder 8 by a space surrounded by the head 16 and the head cover 17. The head cover 17 has a through hole 17a formed at the center thereof coaxially with the cylindrical portion 3A. The seal member 14 is disposed in the through hole 17a and a sleeve 31 for retaining the press fit is press-fitted. The sleeve 31 forms a central hole coaxially with the cylindrical portion 3A. The head cover 17 is inserted into the through hole 17a with the pipe portion 2A1 of the support member 2A described above, sealed with the seal member 14, and slidable with respect to the pipe portion 2A1 via the sleeve 31. . The sleeve 31, the head cover 17, and the support member 2 </ b> A constitute a part of a support device for the compressor body 4.
[0016]
The linear motor unit 6 includes a stator 6A and a movable element 6B. By applying an alternating voltage to the coil 6C of the stator 6A, a reciprocating driving force is generated in the movable element 6B having a magnet 6D on the outer periphery. The stator 6A is formed in a cylindrical shape, and the cylinder 8 and the spring pressing member 15 are fixed to both ends thereof by bolts 20 and 21. A piston 9 is fixed to the center of the movable element 6B by press-fitting or the like. The mover 6B is pressed from both sides in the axial direction by a spring 7A supported by the cylinder 8 and a spring 7B supported by the spring pressing member 15. Thereby, the driving force of the linear motor unit 6 acts on the vibration system of the movable element 6B and the piston 9 and the springs 7A and 7B, and the piston 9 reciprocates in the cylinder 8. The volume of the compression chamber 12 is changed by this reciprocation, and the gas sucked through the suction passage 1 enters the compression chamber 12 through the suction valve 10, is compressed in the compression chamber 12, and is discharged into the discharge silencer through the discharge valve 11. Further, the ink is discharged through the discharge passage 2. And on the linear motor part 6 side of the compressor main body 4, the vibration-proof spring 13B is interposed between the spring pressing member 15 and the cover part 3C in a state compressed to some extent. Further, on the side of the compression mechanism section 5 of the compressor body 4, a vibration-proof spring 13A is interposed between the head cover 17 and the lid section 3B in a state where it is compressed to some extent.
[0017]
In the present embodiment, the support member 1A, which is a member constituting the suction passage 1, is connected to the compressor body 4 so that the suction passage 1 communicates with the through hole 15a communicated with the suction side of the compression mechanism section 5. The piston 9 is slidably coupled in the reciprocating direction. Further, the support member 2A, which is a member constituting the discharge passage 2, is connected to the discharge silencer, which is a discharge-side passage of the compression mechanism section 5, with the discharge passage 2 being kept in a sealed state and communicating with the compressor main body 4 The piston 9 is slidably coupled in the reciprocating direction of the piston 9. With this configuration, while maintaining the function of connecting the suction passage 1 and the discharge passage 2 to the suction side and the discharge side of the compressor body 4, vibrations generated in the compressor body 4 are supported by the support members 1A and 2A. 4, the magnitude of vibration absorbed by sliding on the airtight container 3 and transmitted to the sealed container 3 is reduced, and the repeated stress applied to the support members 1 </ b> A and 2 </ b> A is reduced. As a result, noise and vibration of the compressor can be reduced, and the reliability can be improved with a small size.
[0018]
And since the sealing member 14 is provided in the sliding part of the support member 2A and the compressor body 4 configured to communicate the discharge passage 2 and the discharge silencer which is the discharge-side passage, Even if the sliding portion between the support member 2A and the compressor body 4 reciprocates due to the operation of the compressor, the airtightness can be reliably maintained.
[0019]
Further, in this embodiment, the spring pressing member 15 and the sleeve 31 which are the support portions on the compressor body 5 side and the support members 1A and 1B which are the support portions on the closed container 3 side are slid in the reciprocating direction of the piston 9. Since the support mechanism coupled movably and the vibration-proof springs 13A and 13B that elastically support the compressor body 4 from both sides in the reciprocating direction of the piston 9 constitute a support device for the compressor body 4. Even if the compressor is placed vertically, horizontally, or obliquely, the deformation direction of the vibration-proof springs 13A, 13B due to the weight of the compressor body 4 is regulated by the reciprocating direction of the piston 9, and the installation posture other than vertically installed The weight of the compressor main body 4 is borne by the support mechanism. As a result, even if the compressor is installed in a posture other than vertical installation, no excessive stress is applied to the anti-vibration springs 13A and 13B, so that the functions of the anti-vibration springs 13A and 13B can be maintained. Therefore, it is possible to maintain sufficient reliability and to have a high degree of freedom in the placement.
[0020]
In this embodiment, the suction passage 1, the piston 9, and the discharge passage 2 are arranged on the same axis. Further, the suction passage 1 and the discharge passage 2 are formed in a straight line which is a simple shape. Therefore, in this embodiment, the space for the suction passage 1 and the discharge passage 9 can be saved, and the entire compressor can be reduced in size. In addition, since the gas flow during the operation of the compressor is linear from the suction side to the discharge side, the flow path loss is reduced and the efficiency of the compressor can be improved. However, in the present embodiment, discharge silencers are provided in the head 16 and the head cover 17 to reduce noise, and only this portion is not a linear flow path, but a necessary minimum flow path loss can be achieved. .
[0021]
In the present embodiment, the suction passage 1 and the discharge passage 2 are provided on the support members 1A and 2A that support the compressor body 4 in the hermetic container 3 so as to be movable in the axial direction, and the vibration-proof springs 13A and 13B are compressed. Vibration transmitted from the machine body 4 to the sealed container 3 is reduced. Therefore, the structure can be simplified and the size can be reduced as compared with the case where the support members 1A and 2A are provided separately from the suction passage 1 and the discharge passage 2.
[0022]
In the present embodiment, the same axis is an axis passing through the center of gravity of the compressor body 4, and is the center axis of the sealed container 3 and the compressor body 4. By passing through the center of gravity of the compressor body 4, the compressor body 4 does not rotate in the hermetic container 3 due to the deviation of the center of gravity and the axis of the support member, regardless of which direction is horizontal or oblique. Is obtained. If the central axis of the sealed container 3 is used, the alignment of the suction passage 1 and the discharge passage 2 is easy.
[0023]
In the present embodiment, the pressure in the sealed container 3 is the pressure of the suction gas, and the seal member 14 is provided between the discharge passage 2 and the compressor body 4. The sealing member 14 may be provided between the suction passage 1 and the compressor body 4 at a pressure, or the inside of the sealed container 3 is set to a pressure intermediate between the suction gas and the discharge gas, and the discharge passage 2 and the suction passage 1 You may make it provide the sealing member 14 between the compressor main bodies 4 in both.
[0024]
The linear compressor of the present invention can be used, for example, in an air conditioner to increase performance by increasing the size of a heat exchanger or to increase the internal volume of a refrigerator by reducing the size of the compressor. it can. In addition, it can be used as a compact cooling technique for electronic devices that have recently been developed for high-density mounting. In addition, since the degree of freedom of installation posture is high, the degree of freedom of design and installation of products using this compressor is increased, and it is also easy to apply to vehicles, trains, airplanes, etc. whose posture changes due to movement. is there.
[0025]
【The invention's effect】
According to the present invention, highly reliable linear compression is achieved by reducing the repeated stress applied to the members constituting the suction passage or the discharge passage from the compressor body to the sealed container and the vibration transmitted from the compressor body to the sealed container. You can get a chance.
[0026]
In addition, according to the present invention, it is possible to reduce the repeated stress applied to the members constituting the suction passage or the discharge passage from the compressor body to the sealed container and the vibration transmitted from the compressor body to the sealed container, and to achieve high reliability. A linear compressor having a high degree of freedom in the installation posture of the compressor can be obtained while maintaining it.
[0027]
Further, according to the present invention, it is possible to reduce the repetitive stress applied to the members constituting the suction passage or the discharge passage from the compressor body to the sealed container and to reduce the vibration transmitted from the compressor body to the sealed container. A linear compressor having a high degree of freedom in the installation posture of the compressor can be obtained while maintaining reliability.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a linear compressor according to an embodiment of the present invention in a vertically placed state.
FIG. 2 is a longitudinal sectional view of the compressor in a horizontal state.
FIG. 3 is a cross-sectional view taken along the line AA in FIG.
DESCRIPTION OF SYMBOLS 1 ... Suction passage, 2 ... Discharge passage, 1A, 2A ... Support member, 3 ... Sealed container, 3A ... Cylindrical part, 3B, 3C ... Cover part, 4 ... Compressor main body, 5 ... Compression mechanism part, 6 ... Linear motor Part, 6A ... stator, 6B ... mover, 6C ... coil, 6D ... magnet, 7A, 7B ... spring, 8 ... cylinder, 9 ... piston, 9a ... suction hole, 10 ... suction valve, 11 ... discharge valve, 12 ... Compression chamber, 13A, 13B ... Anti-vibration spring, 14 ... Seal member, 15 ... Spring pressing member, 16 ... Head, 17 ... Head cover, 18 ... Suction pipe, 19 ... Discharge pipe, 20, 21, 22 ... Bolt, 31 …sleeve.

Claims (6)

In a linear compressor in which a compressor body including a compression mechanism unit and a linear motor unit is housed in a sealed container via a support device.
The sealed container has a suction passage for sucking gas from the outside, and a discharge passage for discharging gas to the outside,
The compression mechanism includes a cylinder having a cylinder chamber and a piston that reciprocates in the cylinder chamber,
The linear motor unit includes a stator and a mover that reciprocates by connecting the piston,
The support device includes an anti-vibration spring that elastically supports the compressor body from both sides in a reciprocating direction of the piston,
At least one of the members constituting the suction passage and the discharge passage is connected to the compressor body so that the suction passage or the discharge passage communicates with the suction side or the discharge side passage of the compression mechanism section. A linear compressor characterized by being slidably coupled in a reciprocating direction of a piston. 2. The seal member according to claim 1, wherein a sealing member is provided at a sliding portion between the member configured to communicate the suction passage or the discharge passage and the suction side or the discharge side passage of the compression mechanism portion and the compressor body. A linear compressor characterized by being provided. In a linear compressor in which a compressor body including a compression mechanism unit and a linear motor unit is housed in a sealed container via a support device.
The sealed container has a suction passage for sucking gas from the outside, and a discharge passage for discharging gas to the outside,
The compression mechanism includes a cylinder having a cylinder chamber and a piston that reciprocates in the cylinder chamber,
The linear motor unit includes a stator and a mover that reciprocates by connecting the piston,
The support device includes a support mechanism in which a support portion on the compressor main body side and a support portion on the airtight container side are slidably coupled in a reciprocating direction of the piston, and the compressor main body is reciprocated with the piston. An anti-vibration spring that elastically supports from both sides of the direction,
At least one of the members constituting the suction passage and the discharge passage is connected to the piston in the compressor body so that the suction passage or the discharge passage communicates with the suction side or the discharge side passage of the compression mechanism section. A linear compressor characterized by being slidably coupled in the reciprocating direction. 4. The linear compressor according to claim 3, wherein an axis of reciprocation of the piston is positioned so as to pass through the center of gravity of the compressor body. In a linear compressor in which a compressor body including a compression mechanism unit and a linear motor unit is housed in a sealed container via a support device.
The sealed container has a suction passage for sucking gas from the outside, and a discharge passage for discharging gas to the outside,
The compression mechanism section includes a cylinder having a cylinder chamber, and a piston having a suction hole into the cylinder chamber while reciprocating in the cylinder chamber,
The linear motor unit includes a stator and a mover that reciprocates by connecting the piston,
The support device includes a support mechanism in which a support portion on the compressor body side and a support member on the airtight container side are slidably coupled in a reciprocating direction of the piston, and the compressor body is reciprocated with the piston. An anti-vibration spring that elastically supports from both sides of the direction,
The support member forms the suction passage and the discharge passage, and the suction passage and the discharge passage are provided so as to communicate with a suction side or a discharge side passage of the compression mechanism section. . 6. The linear compressor according to claim 5, wherein the suction passage of the support member, the suction hole of the piston, and the discharge passage of the support member are provided on the same axis.

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