JP2000249061A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the occurrence of noise due to resonance of a shell in a compressor used in a domestic refrigerator or the like. SOLUTION: A fulcrum fixing part 16 is fixed at the resonance node part 21 of the resonance mode of a shell 2, a working contact surface part 18 is forced to press contact with a resonance belly part 20 through oil 22. The fulcrum fixing part 16 and the working contact surface part 18 reduce the occurrence of noise by adding a baffle plate 19, coupled by a coupling vibration part 17, to the shell 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor,
In particular, the present invention relates to a technique for reducing noise generated by resonance of a compressor shell for obtaining a low-noise compressor.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for low noise compressors.

As a conventional compressor, Japanese Utility Model Laid-Open No. 55-16
JP-A-7581, JP-A-2-159440, JP-B-63-2630, JP-A-53-110506, and JP-A-51-81406. JP-A-63-1
No. 24890.

Hereinafter, a conventional compressor will be described with reference to the drawings.

FIG. 13 is a longitudinal sectional view of a compressor described in Japanese Utility Model Laid-Open No. 55-167581.

In FIG. 13, 1 is a compressor, 2 is an upper shell, 3 is a lower shell, 4 is a compression element, 5 is a supporting device, 6 is a first baffle plate, 7 is an interval, and 8 is a second baffle. It is a board.

The sonic vibration and mechanical vibration generated by the compression element 4 are transmitted to the supporting device 5 or directly oscillate the upper shell 2 and the lower shell 3 as sound waves to cause the upper shell 2 and the lower shell 3 to vibrate.
However, there is described a technique in which the second baffle plate 8 is pressed against the first baffle plate 7 at an interval 7 to attenuate the resonance.

FIG. 14 shows an example of an equivalent technique which has been disclosed in recent years and is described in Japanese Patent Application Laid-Open No. 2-159440.

In FIG. 14, 11 is a vibrating body, 12 is a vibration isolating member,
13 is a contact member, 14 is a fixing member, and 15 is a connecting member.

The vibrating body 11 in FIG. 14 corresponds to the vertical plane of the upper shell 2 and the lower shell 3 in FIG. 13, but in FIG. Contact member 1 fixed at 14 and connected to connecting member 15
A technique is described in which a friction damping effect is obtained by contacting the vibration member 3 with the vibrating body 11 with elastic force.

FIG. 15 is that described in Japanese Patent Application Laid-Open No. 2-159440.

The same elements as those in FIG. 14 are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 15 shows an application example of the vibration isolating member 12 of FIG. 14, which is composed of a plurality of contact members 13 and a connecting member 15.

In each of the examples, the basic principle utilizes frictional attenuation (Equation 1) due to metal contact.

[0015]

(Equation 1)

It is shown that the vibration energy attenuation L is obtained by the product of the contact force F and the relative displacement δ of the contact between the objects A and B.

The objects corresponding to the objects A and B are a first baffle plate 7 and a second baffle plate 8 in FIG.
In FIG. 4, the vibrating body 11 and the contact member 14 are provided.

A number of technically similar or equivalent techniques have been disclosed, for example, Japanese Utility Model Publication No. Sho 63-2630, Japanese Utility Model Publication No. Sho 53-110506, and Japanese Utility Model Application Publication No. Sho 51-81406.
And JP-A-63-124890.

[0019]

However, in the above-described conventional configuration or technique, a slight damping effect can be obtained by damping metal friction energy generated between the vibrating body 11 and the contact member 14 in FIG. The mode of 11 itself is not taken into account, and there is a problem that the amount of damping effect is insufficient or that no effect is obtained due to the mode of the vibrating body, that is, the shell of the compressor, and that the noise reduction effect is insufficient. .

Such a problem has not been solved even if a plurality of contact members are provided as shown in FIG.

The principle of the conventional noise reduction is as follows.
In FIG. 14, only the frictional energy between the vibrating body 11 and the contact member 14 is attenuated, and there is a problem that the energy is not sufficiently attenuated or the noise is not sufficiently reduced.

Furthermore, the vibration isolating member is attached to the amplitude portion of the vibrating body, that is, to the antinode of the mode, in many cases as a known method. However, the relationship between the fulcrum and the action point is not considered. There were also problems that the noise reduction effect was insufficient or could not be obtained at all.

Further, there has been a problem that it has not been possible to ensure a sufficient and stable noise reduction effect and to attain easy manufacturing.

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems, and has as its object to provide a low-noise compressor that can be manufactured easily and at low cost.

[0025]

In order to achieve the above object, a compressor according to the present invention follows the concepts of (Equation 2) and (Equation 3).

[0026]

(Equation 2)

[0027]

(Equation 3)

That is, in order to reduce the energy of the noise generated in the equation (2), the frictional heat conversion energy, the elastic damping / heat conversion energy in the oil molecule, and the vibration frequency conversion damping energy are increased.

More specifically, in order to reduce the noise energy at the specific frequency f in (Equation 3), the oil intramolecular elasticity is reduced so as to reduce the noise energy generated at the specific frequency f among the energy amounts in the entire frequency band. Decay
It increases heat conversion energy and vibration frequency conversion damping energy.

Incidentally, (Equation 3) is a mathematical expression of (Equation 2).

According to the principle described above, the compressor of the present invention has a shell for accommodating a compression element, a support device for supporting the compression element, and an internal pipe for guiding gas in the shell to the outside of the shell. A baffle plate having a fulcrum fixing portion, a connecting vibration portion, and a working contact surface portion on the inner surface of the shell is fixed to the fulcrum fixing portion on a resonance node of a resonance mode on the inner surface of the shell, and the working contact surface portion is attached to a resonance antinode of the mode of the shell. The resonance antinode and the resonance node are connected to each other by a connection vibrating portion made of a vibrating member.

As a result, a sufficient noise reduction effect can be obtained.

A baffle plate having a fulcrum fixing portion, a connecting vibrating portion, and a working contact surface portion on the inner surface of the shell is fixed to the fulcrum fixing portion on the resonance antinode of the resonance mode on the inner surface of the shell, and is attached to the resonance node of the shell mode. The working contact surface portion is brought into press contact with an oil or an oil film, and the resonance antinode and the resonance node are connected by a connection vibration portion made of a vibrating member.

Thus, a sufficient noise reduction effect can be obtained.

A baffle plate having a fulcrum fixing portion, a connecting vibration portion, and a working contact surface portion, wherein a plurality of the connecting vibration portions having different natural frequencies are provided.

Thus, a sufficient noise reduction effect can be obtained.

Further, a compressing element is supported on the shell bottom surface of the shell by a supporting device in a substantially vertical direction, and a working contact surface portion is brought into pressure contact with the vicinity of the central portion of the shell bottom surface in the oil retained on the shell bottom surface, whereby the shell is pressed. A fulcrum fixing portion is fixed in the vicinity of the corner between the bottom surface and the side surface of the shell.

As a result, a sufficient noise reduction effect can be obtained with respect to the noise caused by the large shell bottom surface as a noise factor of the compressor having the supporting device on the shell bottom surface.

Further, a compression device is supported on the shell bottom surface of the shell by a support device in a substantially vertical direction, and a fulcrum fixing portion is fixed in the vicinity of the center of the shell bottom surface in the oil reserved on the shell bottom surface. The working contact surface portion is pressed and contacted in the oil near the corners of the bottom and side surfaces of the shell.

As a result, it is possible to obtain a sufficient noise reduction effect on the noise caused by the large shell bottom surface as a noise factor of the compressor having the support device on the shell bottom surface.

In addition, there is provided an oil supply device for supplying oil to the upper surface of the shell, and a working contact surface portion is pressed near the center of the main curvature surface of the upper surface of the shell via an oil film of the oil supplied by the oil supply device. The fulcrum fixing portion is fixed to a connecting curved surface connecting the main curvature surface and the side surface of the shell.

As a result, a sufficient noise reduction effect can be obtained for the noise caused by the upper surface of the shell which is a large factor of the noise of the compressor.

Further, an oil supply device for supplying oil to the upper surface of the shell is provided, and a fulcrum fixing portion is fixed near the center of the main curvature surface of the upper surface of the shell to connect the main curvature surface and the side surface of the shell. The working contact surface portion is brought into pressure contact with a curved surface via an oil film of the oil supplied by the oil supply device.

As a result, it is possible to obtain a sufficient noise reduction effect on the noise caused by the upper surface of the shell which is a large factor of the noise of the compressor.

[0045]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A compressor according to the present invention has a shell for accommodating a compression element, a support device for supporting the compression element, and an internal pipe for guiding gas in the shell to the outside of the shell. A baffle plate having a fulcrum fixing portion, a connecting vibration portion, and a working contact surface portion on the inner surface is fixed to the fulcrum fixing portion on a resonance node of a resonance mode on the inner surface of the shell, and the working contact surface portion is oiled on a resonance antinode of the mode of the shell. Alternatively, the resonance abdomen and the resonance node are connected by a connection vibrating portion made of a vibrating member.

As a result, the working contact surface located at the abdomen of the mode in which resonance of the shell is to be suppressed receives a large amplitude at the natural frequency of the mode, but the amplitude displacement energy depends on the vibration generated by the mechanical elements of the compressor. If the energy is the same, the frictional heat energy of the contact surface and the vibration frequency conversion damping energy dispersed and vibrated to the frequency of the connected vibration part and the energy in the oil molecule elastic damping and heat conversion energy by the oil present in the working contact surface The effect of reducing the noise energy generated by the shell at the natural frequency of the mode to be suppressed by the conversion is obtained.

Further, since the baffle plate is fixed to the shell, that is, the fulcrum is near a node having no amplitude of the mode to be controlled, there is no phenomenon that the baffle plate vibrates integrally with the mode. A sufficient noise reduction effect of machine noise can be obtained.

A baffle plate having a fulcrum fixing portion, a connecting vibrating portion, and a working contact surface portion on the inner surface of the shell is fixed to the fulcrum fixing portion on the resonance antinode of the resonance mode on the inner surface of the shell, and is attached to the resonance node of the mode of the shell. The working contact surface portion is brought into press contact with an oil or an oil film, and the resonance antinode and the resonance node are connected by a connection vibration portion made of a vibrating member.

As a result, the fulcrum fixing portion at the abdomen of the mode in which the resonance of the shell is to be suppressed receives a large amplitude at the natural frequency of the mode, but the amplitude displacement energy is transmitted to the working contact surface by transmitting the coupled vibration portion. Can be

Since the working contact surface portion is in pressure contact with the shell at the node of the mode, which is the non-vibrating portion of the mode to be suppressed, the portion does not vibrate as the mode of the shell to be suppressed.

The vibration energy is dissipated in the frictional heat energy of the contact surface and the frequency of the connected vibration part, and the vibration frequency conversion damping energy oscillates, and the elastic damping and heat conversion in the oil molecules due to the oil present in the working contact surface. The noise generated by the shell at the natural frequency of the mode that is desired to be suppressed by being converted into energy is reduced, and as a result, a sufficient noise reduction effect of the compressor generated noise can be obtained.

A baffle plate having a fulcrum fixing portion, a connecting vibration portion, and a working contact surface portion, wherein a plurality of the connecting vibration portions having different natural frequencies are provided.

As a result, the vibration energy is dissipated in the frictional heat energy of the contact surface and the vibration of the connected vibration part, and the vibration frequency conversion damping energy is vibrated. The noise generated by the shell at the natural frequency of the mode that you want to suppress by being converted to converted energy has the effect of reducing the noise energy.However, since there are multiple connected vibrating parts and the natural frequencies are different, the vibration frequency conversion frequency Is dispersed, the frequency components of the noise can be dispersed, and a sufficient noise reduction effect can be obtained. As a result, a sufficient noise reduction effect of the compressor generated noise can be obtained.

Further, a compression device is supported on the shell bottom surface of the shell in a substantially vertical direction by a support device, and the working contact surface portion is brought into pressure contact with the shell bottom surface in the oil retained on the shell bottom surface in the vicinity of the center of the shell bottom surface. A fulcrum fixing portion is fixed in the vicinity of the corner between the bottom surface and the side surface of the shell.

By the above-described operation, it is possible to obtain a sufficient noise reduction effect on noise caused by a large shell bottom surface as a noise factor of the compressor having the support device on the shell bottom surface.

Further, the compression element is supported on the shell bottom surface of the shell in a substantially vertical direction by a supporting device, and a fulcrum fixing portion is fixed near the center of the shell bottom surface in the oil reserved on the shell bottom surface, thereby fixing the shell. The working contact surface portion is pressed and contacted in the oil near the corners of the bottom and side surfaces of the shell.

By the above-described operation, a sufficient noise reduction effect can be obtained for the noise caused by the large shell bottom surface as a noise factor of the compressor having the support device on the shell bottom surface.

Further, an oil supply device for supplying oil to the shell upper surface of the shell is provided, and a working contact surface portion is pressed near the center of a main curvature surface of the shell upper surface via an oil film of the oil supplied by the oil supply device. The fulcrum fixing portion is fixed to a connecting curved surface connecting the main curvature surface and the side surface of the shell.

By the above-described operation, it is possible to obtain a sufficient noise reduction effect on noise caused by the upper surface of the shell which is a large noise factor of the compressor.

Further, an oil supply device for supplying oil to the upper surface of the shell is provided, and a fulcrum fixing portion is fixed near the center of the main curvature surface of the upper surface of the shell to connect the main curvature surface and the side surface of the shell. The working contact surface portion is brought into pressure contact with a curved surface via an oil film of the oil supplied by the oil supply device.

By the above-described operation, it is possible to obtain a sufficient noise reduction effect on noise caused by the upper surface of the shell which is a large noise factor of the compressor.

[0062]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a compressor according to the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a perspective sectional view of a compressor according to Embodiment 1 of the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 shows a noise frequency mode and a partial cross section of a baffle plate, which are problems of the compressor of the first embodiment.

FIG. 4 is a sectional view of a main part of a shell and a baffle plate according to an application of the first embodiment.

In FIG. 1, reference numeral 1 denotes a compressor, and a compression element 5 having a mechanical section 3 in the upper part of the shell 2 and a motor 4 in the lower part is elastically supported by a support device 6. The shell 2 is filled with a compressed gas 7, and the compressed gas 7 compresses the space volume of a cylinder 9 provided integrally with the block 8 by a piston 10, and the compressed gas 7 is compressed outside the shell 2 through a discharge pipe 12 from an internal pipe 11. It is led to.

The rotational power of the motor 4 is transmitted to the reciprocating motion of the piston 10 by the crankshaft 13, the connecting rod 14, and the like.

On the inner surface 15 of the shell 2, a baffle plate 19 having a fulcrum fixing portion 16, a connecting vibrating portion 17, and an operating contact surface portion 18 is provided near the fulcrum fixing portion 20 in the mode to be reduced. 16 is fixed by spot welding, projection welding, or the like, so that the working contact surface 18 near the resonance antinode 21 of the mode is pressed against the inner surface 15 of the shell 2 in the oil 22.

FIG. 2 is a cross-sectional view of a main part of the working contact surface portion 18. The working contact surface portion 18 microscopically presses and contacts the shell inner surface 15 of the shell 2 via the oil film 23.

The compressor configured as described above
The operation will be described below.

By the rotation of the motor 4, the piston 10 compresses the compressed gas 7 in the cylinder 9 via the crankshaft 13 and the connecting rod 14, and the compressed gas 7 is discharged to the outside of the shell 2 through the internal pipe 11. .

When the compressed gas 7 is compressed, the sliding vibration of the piston 10 and the like is caused by the rotation vibration and rotation sound of the motor 4, the fluid sound of the compressed gas 7, the vibration of the compression element 5, and the crankshaft 13 and the connecting rod 14 during compression. Various vibrations such as sound
There is noise.

These noises are transmitted directly to the shell 2 as sound waves or as vibrations from the support device 6 or the internal pipe 11, and vibrate the shell 2.

On the other hand, the shell 2 has a mode in which vibration occurs at a specific frequency in response to the excitation. For example, in the case of the present embodiment, it is assumed that the mode shown in FIG. 3 is the main source of noise.

The dotted line shown in FIG. 3 shows the manner in which the shell bottom surface 24 vibrates in the directions indicated by arrows A and B. In this mode, reference numeral 20 denotes a resonance node, and reference numeral 21 denotes a resonance antinode.

In the baffle plate 19, the fulcrum fixing portion 16 is fixed to the vicinity of the resonance node portion 20 by spot welding, projection welding, or fixing by another component. In contact with 21,
The working contact surface portion 18 is in pressure contact with the shell inner surface 15 via the oil 22 or the oil film 23.

The operation of the baffle plate is given by (Equation 2) and (Equation 3)
by.

The frictional heat conversion energy of the formula (2) is obtained by the working contact surface 18 and the shell inner surface 15, and the elastic damping / heat conversion energy in the oil molecule is obtained by the oil film 23 interposed between the working contact surface 18 and the shell inner surface 15. can get.

The working contact surface portion 18 and the fulcrum fixing portion 16 are connected by a connecting vibration portion 17, and the connecting vibration portion 17 partially converts the vibration energy from the working contact surface portion 18 into energy by the frequency of the connecting vibration portion 18. And the energy is converted as vibration frequency conversion damping energy.

More specifically, in order to reduce the noise energy at the specific frequency f in (Equation 3), in the case of this embodiment,
The purpose is to increase the elastic damping energy in oil molecules, heat conversion energy, and vibration frequency conversion damping energy so as to reduce the amount of noise energy generated at the specific frequency f of the shell bottom surface 24, which is the subject.

Further, the baffle plate 19 is attached to the fulcrum fixing portion 1.
6 is located in the vicinity of the resonance contact portion 20, and the operation contact surface portion 18 is located in the vicinity of the resonance antinode 21 or, as in the second embodiment, conversely, the fulcrum fixing portion 16 is located in the vicinity of the resonance antinode 21 and the operation contact surface 18 May be in the vicinity of the resonance node portion 20, but in a state where the fulcrum fixing portion 16 and the working contact surface portion 18 are both on the plane of the resonance abdomen or are biased in the vicinity of the resonance node portion, the baffle plate 19 also vibrates integrally with the mode surface of the shell 2, or the vibration from the working contact surface portion 18 is transmitted to another resonance portion, so that a sufficient reduction effect cannot be obtained.

The position at which the fulcrum fixing portion 16 is fixed to the resonance node 20 and the position at which the working contact surface portion 18 is pressed against the resonance abdomen 21 are determined by fixing the fulcrum at the distance between the resonance node 20 and the resonance abdomen 21. A position within 20% of the portion 16 and a position within 30% of the working contact surface 18 are appropriate.

A conventional technique disclosed in Japanese Utility Model Application Laid-Open No. 555-1
No. 67581, JP-A-2-159440
JP-A-63-2630; JP-A-53-110506; JP-A-51-81406;
Japanese Patent No. 124890 does not describe the relationship between the fulcrum, the action point, and the mode described above, and provides a special effect according to the present invention.

Further, the effect of the noise reduction according to the present invention is that the working contact surface 18 is formed on the inner surface 15 of the shell through the oil film 23.
The oil film 23 is obtained by the action of absorbing the frictional heat conversion energy (Equation 2) and converting the vibration energy by the elastic damping energy in the oil molecule by the pressure contact with the oil film 23. The entire contact surface 18 is in the oil 22, and a sufficient effect can be obtained.

Oil 22 or oil film 23 and working contact surface 1
8. The relation, action and effect of the shell inner surface 15 are not described in the prior art, but provide special effects according to the present invention.

As an application example of this embodiment, a plurality of baffle plates 18 may be provided as shown in FIG.

FIG. 5 shows an example of the noise reduction effect of the compressor according to this embodiment.

The horizontal axis in FIG. 5 is a frequency band, and AP
(A) shows the whole sound, and the vertical axis shows the noise level in dB (A) of the sound pressure level.

According to the present embodiment, 2.5 KHz band,
There is a reduction effect of about 5 dB in the 15 KHz band, and the noise of the entire compressor is obtained as an effect of about 5 dB (A). According to the embodiment of the present invention, a sufficient noise reduction effect is obtained.

The material, shape, and thickness of the baffle plate 19 may be a steel plate, a spring steel, a plastic material, or a composite material thereof. The shape is intended to reduce noise. An appropriate shape is selected according to the mode and the shape of the shell 2.

For example, in the case of a steel plate, a thickness of 0.5 to 5 mm is appropriate from the viewpoint of welding aptitude. In each case, an effect amount based on the equations (2) and (3) is obtained. As described above, it is possible to select the specific frequency band to be attenuated, the mode of the frequency to be attenuated, the position of the resonance abdomen and the resonance node, and the characteristics aimed at reduction.

The present embodiment is easy to manufacture and inexpensive.

(Embodiment 2) FIG. 6 is a longitudinal sectional view of a compressor according to Embodiment 2 of the present invention.

The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

In FIG. 6, in the present embodiment, the position of the fulcrum fixing portion 16 of the baffle plate 19 according to the first embodiment is set to the resonance antinode 20 in the mode that is the main source of noise of the shell 2, and the working contact surface portion 18 is set. This is a resonance node 21 of the same mode.

Further, in this embodiment, since the resonance node portion 21 exists on the circumference of the shell bottom surface 24, the working contact surface portion 18 is provided at two places near the resonance node portion 21.

[0098] Regarding the compressor configured as described above,
The operation will be described below.

When the resonance mode of the shell, which is the main factor of noise generation, is the shell bottom surface 15 as in the first embodiment, the second embodiment differs from the first embodiment in that the fulcrum fixing portion 16 of the baffle plate 19 and the shell 2 of the working contact surface portion 18 are different. Mode resonance node 20 and resonance abdomen 21
The operation of the baffle plate 19 is based on (Equation 2) and (Equation 3), as in the case of the first embodiment.

That is, the resonance abdomen 21 of the shell bottom surface 15
The energy of the vibration that occurs in is propagated to the coupling vibration part 17, is frequency-converted and attenuated by the coupling vibration part 17, and is also propagated to the working contact surface part 18, where it is frictionally attenuated between the working contact surface part 18 and the shell inner surface 15. Oil 22
Alternatively, the absorption of the frictional heat conversion energy and the conversion to the oil intramolecular elastic damping energy are performed through the oil film 23.

At this time, the surface of the working contact surface portion 18 that is in pressure contact, that is, the working surface is in the vicinity of the resonance node 20 of the mode. Does not occur, and a sufficient damping effect can be obtained.

The position where the fulcrum fixing portion 16 is fixed to the resonance abdomen 21 and the position where the working contact surface portion 18 is pressed against the resonance abdomen 20 are determined by the distance between the resonance node 20 and the resonance abdomen 21. A position within 20% of the surface portion 18 and a position within 30% of the fulcrum fixing portion 16 are appropriate.

According to the present embodiment, a sufficient noise reduction effect can be obtained as in the case of the first embodiment, the fixing to the shell bottom surface is easy, and the working contact surface can be easily changed according to the structure of the compressor.

As described in the application of the first embodiment, a plurality of baffle plates may be used.

(Embodiment 3) FIG. 7 is a sectional view of a main part of a compressor according to Embodiment 3 of the present invention.

FIG. 8 is a plan view of a baffle plate according to Embodiment 3 of the present invention.

The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

Reference numeral 25 denotes a fulcrum fixing portion, and reference numerals 26, 27, and 28 denote coupling vibrating portions having arms A, B, and C, respectively.

29, 30, 31, 32, 33, 34, 3
Reference numeral 5 denotes a working contact surface portion, which is a portion that is in pressure contact with the shell inner surface 15. Working contact surfaces 29, 30, 31, 32, 3 to be connected
3, 34, and 35.

With respect to the compressor configured as described above,
The operation will be described below.

When the resonance mode of the shell, which is a main factor of noise generation, is the shell bottom surface 15 as in the first embodiment, the connection vibration portions 26 and 2 constituting the baffle plate 36 are different from the first embodiment.
Arm lengths of 7,28 are different.

The natural frequencies of the connecting vibrating parts differ depending on the length of the arms.

Thus, in addition to the first embodiment, since there are a plurality of connected vibrating parts and the natural frequencies are different, the converted frequency of the vibration frequency is dispersed, so that the frequency components of noise can be dispersed and noise characteristics can be improved. A more appropriate or audible noise reduction effect can be obtained.

The method of changing the natural frequency includes factors such as the width and shape of the connecting vibration portion in addition to the length of the connecting vibration portion, so that the shape, productivity and noise reduction effect of the shell 2 are aimed at. Can be applied and developed.

It is appropriate that the natural frequency of the coupled vibrating portion is close to the frequency of the mode which is a problem of the shell by at least 50 Hz and the frequency at which the excitation frequency of the compression element is small.

Further, a plurality of working contact surfaces may be provided near the resonance antinode 20 of the mode as in this embodiment.

Further, as in the second embodiment, a fulcrum fixing portion is fixed to the abdomen of the mode, a plurality of working contact surfaces are pressed against the mode contact portion, and a plurality of couplings having different natural frequencies are connected. A baffle plate having a vibrating section can also be used.

(Embodiment 4) FIG. 9 is a sectional view of a compressor according to Embodiment 4 of the present invention.

FIG. 10 is a mode diagram showing a problem of the fourth embodiment.

The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

In FIG. 9, reference numeral 37 denotes a shell bottom surface, and reference numeral 38 denotes a support device, which is supported in a direction perpendicular to the shell bottom surface 37.

39 is a central portion, 40 is a side surface, 41 is a corner portion, and the central portion 39 is the center of the shell bottom surface 37. The side surface 40 has a substantially elliptical shape of the shell 2 rising almost vertically through the corner portion 41. It is a torso.

FIG. 10 is a mode analysis mesh diagram of the shell bottom surface 37, which is the dominant mode of the shell 2 of FIG.
The central part 39 is the resonance abdomen 21 and the maximum point of amplitude is displayed in mesh.

It has been confirmed that the mode shown in FIG. 10 always occurs in the shell similar to that shown in FIG. 9, which is an important mode as a main cause of noise generation of the compressor.

With respect to the compressor configured as described above,
The operation will be described below.

By the rotation of the motor 4, the piston 10 compresses the compressed gas 7 in the cylinder 9 via the crankshaft 13 and the connecting rod 14, and the compressed gas 7 is discharged to the outside of the shell 2 through the internal pipe 11. .

When the compressed gas 7 is compressed, the piston 10 and the like are slid by the rotation vibration and rotation sound of the motor 4, the fluid sound of the compressed gas 7, the vibration of the compression element 5, the crankshaft 13, the connecting rod 14 and the like during compression. Various vibrations such as sound
There is noise.

These noises are transmitted directly to the shell 2 as sound waves or as vibrations from the support device 38 or the internal piping 11, and vibrate the shell 2. The compression element 5 is substantially perpendicular to the shell bottom surface 37 by the support device 38. , The vibration propagation is large relative to the shell bottom surface 37, and the resonance mode of the shell bottom surface 37 greatly affects noise.

The mode of the shell bottom surface 37 is obtained by analysis and response experiments, and the mode of this embodiment is shown in FIG.

As shown in FIG. 10, the resonance node 20 of the mode is near the corner 41 connecting the shell bottom surface 37 and the side surface 40, and the resonance antinode 21 is near the center 39 of the shell bottom 37.

Also in this embodiment, as in the first embodiment,
(Equation 2) and (Equation 3) provide the effect of the baffle plate 19,
The effect of reducing the noise level related to the resonance of the mode shown in FIG. 10 is obtained.

In this embodiment, the fulcrum fixing portion 16 is fixed near the corner portion 41 which is the mode resonance node portion 20 of the shell bottom surface 37 to be reduced, and the shell bottom surface 37 which is the mode resonance antinode 21 is reduced. The working contact surface 18 was pressed against the vicinity of the central portion 39 in the oil 22, but the working contact surface 1 was located near the corner 41 which is the resonance node 20.
8 in oil 22 and presses into contact with the resonance abdomen 2 of the mode.
Even if the fulcrum fixing portion 16 is fixed in the vicinity of the central portion 39 of the shell bottom surface 37, the same noise reduction effect can be obtained.

(Embodiment 5) FIG. 11 shows Embodiment 5 of the present invention.
FIG. 2 is a sectional view of a compressor according to the first embodiment.

FIG. 12 is a mode diagram showing a subject of the fifth embodiment.

The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

11 and 12, reference numeral 42 denotes a shell upper surface, and an oiling device 43 provided on the crankshaft 13 uses the oil 22 stored at the bottom of the shell 2 to store the oil 22 on the shell upper surface 4.
Feed to 2.

The arrow of the oil supply device 43 provided on the crankshaft 13 in FIG. 11 indicates the flow of supply of the oil 22.

The baffle plate 44 presses the working contact surface portion 46 against the shell upper surface 42 through the oil film 47 of the oil 22 supplied by the oil supply device 43 near the center of the main curvature surface 45 of the shell upper surface 42. Side surface 4 of shell upper surface 42
A fulcrum fixing part 50 is fixed to the shell upper surface 42 in the vicinity of a connecting curved surface 49 connecting the main surface 8 and the main curvature surface 45.

The working contact surface portion 46 of the baffle plate 44 and the fulcrum fixing portion 50 are connected by a connecting vibration portion 51.

In FIG. 12, the resonance mode antinode of the main curvature surface 45 of the shell upper surface 42 is a resonance antinode 52, and the node is a resonance node 53. The resonance antinode 52 is near the center of the main curvature surface 45. The resonance node 53 is near a connecting curved surface 49 which is a curved surface connecting the main curvature surface 45 and the side surface 48.

[0141] With regard to the compressor configured as described above,
The operation will be described below.

By the rotation of the motor 4, the piston 10 compresses the compressed gas 7 in the cylinder 9 via the crankshaft 13 and the connecting rod 14, and the compressed gas 7 is discharged to the outside of the shell 2 through the internal pipe 11. .

When the compressed gas 7 is compressed, the piston 10 and the like are slid by the rotation vibration and rotation sound of the motor 4, the fluid sound of the compressed gas 7, the vibration of the compression element 5, and the crankshaft 13 and the connecting rod 14 during compression. Various vibrations such as sound
There is noise.

These noises are transmitted directly to the shell 2 as sound waves or as vibrations from the support device 38 or the internal pipe 11, and vibrate the shell 2. The resonance mode of the shell upper surface 42 greatly affects the noise.

The mode of the shell bottom surface 42 is obtained by analysis and response experiments, and the mode of this embodiment is shown in FIG.

As shown in FIG. 12, the resonance node 53 of the mode is near the connecting curved surface 49 which is a curved surface connecting the main curvature surface 45 and the side surface 48 of the shell upper surface 42, and the resonance antinode 52
Is near the center of the main curvature surface 45.

In this embodiment, as in the first embodiment,
The effects of the baffle plate 51 can be obtained in (Equation 2) and (Equation 3),
The effect of reducing the noise level related to the resonance of the mode shown in FIG. 10 is obtained.

In this embodiment, a fulcrum fixing portion 50 is fixed near the connecting curved surface 49 as the mode resonance node portion 53 of the shell upper surface 42 to be reduced, and the shell upper surface 42 as the mode resonance antinode 52 is formed. The working contact surface portion 46 was brought into close contact with the vicinity of the central portion of the main curvature surface 45 via the oil film 47 of the oil 22 supplied by the oil supply device 43 in the vicinity of the center portion of the main curvature surface 45, but the resonance node portion 53 was formed. Articulated surface 49
Is in contact with the working contact surface portion 46 through the oil film 47 of the oil 22 supplied by the oil supply device 43 in the vicinity of the main surface of the shell upper surface 42 which is the resonance antinode 52 of the mode. Even if 50 is fixed, the same noise reduction effect can be obtained.

[0149]

As described above, the compressor of the present invention
A shell for accommodating a compression element, a support device for supporting the compression element, and an internal pipe for guiding gas in the shell to the outside of the shell, and a fulcrum fixing portion, a connection vibration portion, and an operation contact surface portion on the shell inner surface. The fulcrum fixing part is fixed to the resonance node of the resonance mode on the inner surface of the shell with the baffle plate having the inner surface of the shell, and the working contact surface is pressed against the resonance antinode of the mode of the shell via an oil or an oil film. The resonance nodes are connected by a connection vibrating portion made of a vibrating member, and a sufficient noise reduction effect can be obtained.

A baffle plate having a fulcrum fixing portion, a connecting vibration portion, and a working contact surface portion on the inner surface of the shell is fixed to the fulcrum fixing portion on the resonance antinode of the resonance mode on the inner surface of the shell, and is attached to the resonance node of the mode of the shell. The working contact surface portion is brought into press contact with an oil or an oil film, and the resonance antinode and the resonance node are connected by a connection vibration portion made of a vibrating member, so that a sufficient noise reduction effect can be obtained. .

A baffle plate having a fulcrum fixing portion, a connecting vibration portion, and a working contact surface portion, wherein a plurality of the connecting vibration portions having different natural frequencies are provided, and a sufficient noise reduction effect is obtained. I can do things.

Further, the compression element is supported on the shell bottom surface of the shell in a substantially vertical direction by a supporting device, and the working contact surface portion is brought into pressure contact with the shell bottom surface in the vicinity of the central portion of the shell bottom surface in the oil retained on the shell bottom surface. A fulcrum fixing portion is fixed in the vicinity of the corner between the bottom surface and the side surface of the shell.

As a result, it is possible to obtain a sufficient noise reduction effect on noise caused by a large shell bottom surface as a noise factor of the compressor having the support device on the shell bottom surface.

Further, the compression element is supported on the shell bottom surface of the shell in a substantially vertical direction by a supporting device, and a fulcrum fixing portion is fixed in the oil retained on the shell bottom surface in the vicinity of the center of the shell bottom surface. The working contact surface portion is pressed and contacted in the oil near the corners of the bottom and side surfaces of the shell.

As a result, it is possible to obtain a sufficient noise reduction effect on noise caused by a large shell bottom surface as a noise factor of the compressor having the support device on the shell bottom surface.

An oil supply device for supplying oil to the upper surface of the shell is provided, and a working contact surface portion is pressed near the center of the main curvature surface of the upper surface of the shell via an oil film of the oil supplied by the oil supply device. The fulcrum fixing portion is fixed to a connecting curved surface connecting the main curvature surface and the side surface of the shell.

As a result, it is possible to obtain a sufficient noise reduction effect on noise caused by the upper surface of the shell which is a large noise factor of the compressor.

Further, an oil supply device for supplying oil to the upper surface of the shell of the shell is provided, and a fulcrum fixing portion is fixed in the vicinity of the center of the main curvature surface of the upper surface of the shell to connect the main curvature surface and the side surface of the shell. The working contact surface portion is brought into pressure contact with a curved surface via an oil film of the oil supplied by the oil supply device.

As a result, a sufficient noise reduction effect can be obtained for the noise caused by the upper surface of the shell which is a large factor of the noise of the compressor.

[Brief description of the drawings]

FIG. 1 is a perspective sectional view of a compressor according to a first embodiment of a compressor according to the present invention.

FIG. 2 is an enlarged sectional view of a main part of the embodiment.

FIG. 3 is a partial cross-sectional view of a noise frequency mode and a baffle plate, which are problems of the embodiment.

FIG. 4 is a sectional view of a main part of an application example of the embodiment.

FIG. 5 is a diagram of a noise reduction effect of the compressor according to the present invention.

FIG. 6 is a longitudinal sectional view of a compressor according to a second embodiment of the compressor according to the present invention.

FIG. 7 is a sectional view of a main part of a compressor according to a third embodiment of the present invention.

FIG. 8 is a plan view of the baffle plate of the embodiment.

FIG. 9 is a sectional view of a compressor according to a fourth embodiment of the present invention.

FIG. 10 is a mode diagram which is a subject of Embodiment 4 of the compressor according to the present invention.

FIG. 11 is a sectional view of a compressor according to a fifth embodiment of the present invention.

FIG. 12 is a diagram showing a mode that is a subject of a fifth embodiment of the compressor according to the present invention.

FIG. 13 is a longitudinal sectional view of a conventional compressor.

FIG. 14 is a partial detailed view of a conventional technique.

FIG. 15 is a partial detailed view of a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Compressor 2 Shell 5 Compression element 6, 38 Supporting device 7 Compressed gas 11 Internal piping 15 Shell inner surface 16, 25 Supporting point fixing part 17, 26, 27, 28 Connection vibration part 18, 29, 30, 31, 32, 33, 34, 35, 4
6 Working contact surface portion 19, 36, 44 Baffle plate 20 Resonant node 21 Resonance antinode 22 Oil 23, 47 Oil film 37 Shell bottom surface 39 Central portion 40 Side surface 41 Corner portion 42 Shell upper surface 43 Oil supply device 45 Main curvature surface

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kenji Kaneshiro 4-5-2, Takaidahondori, Higashiosaka-shi, Osaka Matsushita Refrigerator Co., Ltd. (72) Terumasa Ide 4-chome Takaidahondori, Higashiosaka-shi, Osaka No. 2 Matsushita Refrigerating Machinery Co., Ltd. (72) Inventor Takafumi Horiguchi 4-5-2 Takaita Hondori, Higashi-Osaka City, Osaka Pref. Matsushita Refrigerating Machinery Co., Ltd. 4-5-2-5 Matsushita Refrigeration Co., Ltd. (72) Inventor Fumio Maruyama 4-5-2-5 Takaida Hondori, Higashi-Osaka-shi, Osaka Matsushita Refrigeration Co., Ltd. F-term (reference) 3H003 AA02 AC01 BA00 BB00 BD02 CE02

Claims (7)

[Claims] 1. A shell for accommodating a compression element, a support device for supporting the compression element, and an internal pipe for guiding gas in the shell to the outside of the shell. A baffle plate having an operation contact surface portion is fixed to the fulcrum fixing portion at a resonance node of the resonance mode on the inner surface of the shell, and the operation contact surface portion is pressed against the resonance antinode of the mode of the shell via an oil or oil film, The compressor according to claim 1, wherein the resonance abdomen and the resonance node are connected by a connection vibrating portion made of a vibrating member. 2. A shell for accommodating a compression element, a support device for supporting the compression element, and an internal pipe for guiding gas in the shell to the outside of the shell, wherein a fulcrum fixing part and a connection vibration part are provided on the inner surface of the shell. A baffle plate having a working contact surface portion is fixed to the fulcrum fixing portion on the resonance antinode of the resonance mode on the inner surface of the shell, and the working contact surface portion is pressed into contact with a resonance node of the mode of the shell via an oil or oil film, The compressor according to claim 1, wherein the resonance abdomen and the resonance node are connected by a connection vibrating portion made of a vibrating member. 3. The compressor according to claim 1, further comprising a baffle plate having a fulcrum fixing portion, a connecting vibration portion, and a working contact surface portion, wherein said baffle plate has a plurality of said connecting vibration portions having different natural frequencies. 4. A compression device is supported on the shell bottom surface of the shell in a substantially vertical direction by a support device, and a working contact surface portion is pressed and contacted in the vicinity of a central portion of the shell bottom surface in oil reserved on the shell bottom surface. 4. The compressor according to claim 1, wherein a fulcrum fixing portion is fixed near a corner between the bottom surface and the side surface of the shell. 5. A compression device is supported substantially vertically on a bottom surface of the shell by a support device, and a fulcrum fixing portion is fixed near the center of the bottom surface of the shell in oil reserved on the bottom surface of the shell. 4. The compressor according to claim 2, wherein a working contact surface portion is pressed and contacted in the oil in the vicinity of a corner portion between the bottom surface and the side surface of the shell. 6. An oil supply device for supplying oil to a shell upper surface of the shell, and a working contact surface portion is pressed in the vicinity of the center of a main curvature surface of the shell upper surface via an oil film of the oil supplied by the oil supply device. 4. The compressor according to claim 1, wherein the fulcrum fixing portion is fixed to a connecting curved surface connecting the main curvature surface and the side surface of the shell. 7. An oil supply device for supplying oil to a shell upper surface of a shell, wherein a fulcrum fixing portion is fixed near a center of a main curvature surface of the shell upper surface, and a connection connecting the main curvature surface and a side surface of the shell is provided. 4. The compressor according to claim 2, wherein the working contact surface portion is brought into press contact with the curved surface via an oil film of the oil supplied by the oil supply device.