JPS593197A - Rotary hermetic compressor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a compressor that simultaneously realizes a soundproof structure for reducing the noise of a rotary hermetic compressor and a heat dissipation mechanism for the heat generated by the compressor. Regarding.

(Constitution of Conventional Example and its Problems) Conventionally, the hermetic container of a rotary hermetic compressor has been constructed by combining cold-rolled steel pipes or pressed plates.

However, since the sealed container made of a single plate exhibits unique sharp resonance characteristics, the vibrations generated from the rotary complete compression mechanism element disposed inside the sealed container cause welding between the compression mechanism element and the sealed container. propagates into closed containers through joints,
The sealed container resonated at the peak of the resonant frequency unique to the sealed container, and the compressor generated loud noise.

Conventional noise reduction structures for the resonance of a sealed container include those in which the resonance of the sealed container is suppressed as much as possible by making the shape of the sealed container close to a spherical shape;
There are some types in which an allocation mechanism is attached to the inner wall of a closed container, and these structures are known to suppress the vibration of the closed container and reduce the noise of the compressor. However, when the shape of the airtight container is changed, the space inside the airtight container is restricted, resulting in various inconveniences in the shape design of the compressor. However, there were problems such as not being able to sufficiently reduce noise.

Furthermore, the principle of generation of vibration and noise due to the closed container in a conventional rotary hermetic compressor will be explained with reference to FIGS. 1 to 4. In the figure, 1 is a closed container, and FIG.
(not shown), and FIG. 3 shows a vertical cross-sectional shape parallel to the axis of rotation. This airtight container 1
is made of a single homogeneous material. Therefore, the sealed container 1 is subjected to a deforming force as indicated by the broken line 2 due to an external force F generated from the rotary compression mechanism element portion supported in direct contact with the inner surface of the sealed container 1. Here, the broken line 2 schematically represents an example of how the closed container 1 deforms when it receives an external force F.

At this time, as shown in FIG. 1, when the closed container 1 is observed in a cross section, when the external force F acts at point a, the point a.

A tensile force acts on the outer wall surface at points C and e, and an inner wall surface at points b, d, and f, and a compressive force acts on the wall surface opposite each point. To explain this situation in more detail, Fig. 2 is an enlarged view of point a in Fig. A compressive force acts in the direction of point q, which is the outer wall surface position of point p.
A tensile force acts at . However, there is a force neutral plane o - o' where the tensile force and the compressive force cancel each other out and no force acts on them, and this always exists in the closed container 1 made of a single, homogeneous material. be. Similarly, when the closed container 1 is observed in a vertical section, the external force F generated from the directly supported portion of the closed container is propagated to the compressed airtight container 1, and the electric motor element installed and fixed on the upper part of the closed container 1 is (not shown) and support at both ends of the bottom of the closed container cause surface vibration. FIG. 3 shows a longitudinal sectional view of FIG. 1, and the closed container 1 is subjected to a deforming force as indicated by the broken line 2 due to an external force F generated from the rotary compression mechanism element. At this time, the sealed container 1 that has received the external force F has a tensile force applied to the outer wall surface of the point e and the inner wall surface of the point e in the vertical direction parallel to the rotation axis of the compression mechanism element (not shown). A compressive force acts on the wall opposite the point. To explain this situation in more detail, Figure 4 is an enlarged view of point e in Figure 3.
Similarly to FIG. 2, when an external force F is applied to the closed container 1, a compressive force acts at point r on the inner wall surface (a tensile force acts at point p, which is the position of point r on the outer wall surface). Similarly, a neutral force plane o-o' where neither tensile force nor compressive force acts exists in a closed container made of a single, homogeneous material.

However, since the external force F is a quantity that fluctuates irregularly over time, when the above-mentioned neutral plane exists in the closed container, the closed container exhibits extremely clear resonance characteristics, so the external force F does not change due to this resonance characteristic. This can be amplified and cause vibrations and noise to be generated from the sealed container.

(Object of the Invention) The present invention eliminates the above-mentioned drawbacks of the conventional art.The purpose of the present invention is to suppress the resonance characteristics of the closed container and to reduce the generation of vibration and noise by eliminating the above-mentioned neutral plane. It's about suppressing it.

(Structure of the Invention) As a structure for achieving this object, the present invention provides a stator of a motor element section and a rotary complete compression mechanism element section driven by the motor element section on the inner wall surface of a closed container. A cylinder block is fixed, and a vibration-proof radiation zone is tightly wrapped and fixed around the outer periphery of the closed container so as to cover the entire cylinder block and at least a part of the stator.

With this configuration, the above-mentioned neutral plane does not exist in the closed container, suppressing the resonance characteristics of the closed container, suppressing the generation of vibration and noise, and dissipating the heat generated during compressor operation, increasing operating efficiency. , the life of the compressor can be extended.

(Description of Embodiment) A rotary hermetic compressor according to an embodiment of the present invention will be described below with reference to FIGS. 5 to 7.

3 is a closed container forming the outer shell of the rotary hermetic compressor, and its horizontal cross section is circular. Reference numeral 4 designates a vibration-proof radiation radiation zone that is wound so as to be tightly fixed to the closed container 3 in a thermally conductive manner. Consisting of a protruding heat dissipation fin portion 4b, this pedestal portion 4 is placed around the airtight container 3.
They are wound with an appropriate tensile force applied so that parts of a are overlapped with each other. Reference numeral 5 denotes a fixed fixed element of a motor element part housed in the closed container 3, and its outer periphery is fixedly supported by welding in close contact with the inner surface of the closed container 3. Reference numeral 6 denotes a cylinder block which is driven by the electric motor element and forms a part of an ordinary rotary compression mechanism element for compressing refrigerant, and is firmly supported by welding in close contact with the inner surface of the closed container 3. ing. The vibration isolation radiation zone 4 has a base portion 4a thereof.
is fixed at both ends by welding or gluing while maintaining an appropriate tensile force on the outer periphery of the sealed container 3 to a size that surrounds at least a part of the stator 5 of the electric mechanism element part and the entire cylinder block 6. ing.

Next, regarding the relationship between the airtight container 3 and the vibration isolation radiation zone 4,
This will be explained with reference to FIGS. 6 and 7.

Now, when an external force F acts on the inner wall surface from inside the closed container 3, a compressive force is generated on the inner wall surface side of the closed container 3 at the point where the external force F is applied, and a tensile force is generated on the outer wall portion. In the same way, the inner wall surface (Ull has a compressive force,
A tensile force is generated on the outer wall side.

However, since the vibration isolation radiation zone 4 is installed in close contact with the closed container 3 with an appropriate tensile force, when an external force F is applied, the compressive force and the tensile force interfere with each other at the interface between the two.
As a result, there is no clear neutral force plane in the transverse and longitudinal sections of the closed container 3, and the broken line 2 in FIG.
There is no such deformation as shown in . Therefore, the sealed container 3 in which the vibration-isolating radiation zone 4 is installed exhibits clear resonance characteristics at a specific frequency.The vibration energy due to the relative motion between the two is converted into thermal energy at the interface, and the vibration of the sealed container 3 is is attenuated, and as a result, the vibration and noise of the rotary electric compressor are reduced.

Furthermore, since the vibration-isolating radiation zones 4 are partially overlapped, even if the vibration generated from the compressor hits the resonance frequency of the heat-radiating fin portion 4b, the vibration-proof radiation zones 4 overlap each other. The above-mentioned neutral plane of the force no longer exists even in the overlapping parts, and frictional reaction force is generated in the overlapped parts, so that the vibration isolating radiation zone 4 is eventually caused by vibrations generated from the compression mechanism element part. Increase in noise due to resonance of the closed container is also prevented.

When the rotary compressor configured as described above is operated, the vibrations generated in the d-tary compressor mechanism element are as follows:
Cylinder block 6 OK, propagates to closed container 3,
Due to the laminated structure composed of the vibration-proof radiation zone 4 and the sealed container 3, the sealed container 3 no longer exhibits resonance characteristics at a specific frequency, so it does not resonate, and furthermore, the vibration energy is converted into thermal energy due to friction. The shooting performance will further decline.

Moreover, the heat generated by the compression mechanism element and the electric mechanism element is conducted to the vibration-proof radiation zone 4 through the closed container 3, and is radiated into the atmosphere along with the frictional heat from the vibration-proof radiation zone 4 through the radiation fin section 4b. be done.

Regarding the material of the vibration-isolating radiation zone 4, any material can be used as long as it is a metal with good conductivity, but if the material is different from the material of the sealed container 3, it is difficult for a neutral plane of force to exist. Therefore, even better results can be obtained.

In the present invention, the fin portions of the vibration isolating and radiating area are placed so as to overlap each other so that they do not have resonance characteristics, but by using the material of the vibration isolating and radiating area as a vibration isolating alloy, -) Good damping and soundproofing effects can be obtained.

(Effects of the Invention As described above, the rotary complete compressor according to the present invention has a rotary complete compressor that is driven by the stator of the electric mechanism element and the electric motor element on the inner wall surface of the closed container. The cylinder block of the element part was fixedly supported, and a vibration isolation number PA band was tightly wrapped and fixed around the outer periphery of the sealed container so as to cover the entire cylinder block and at least a part of the stator. This function prevents the occurrence of resonance characteristics at specific frequencies in the sealed container, attenuates the vibrations generated by the compressor, and also radiates heat generated from inside the compressor. This has vague effects such as improved efficiency and longer life.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the hermetic container of a conventional rotary hermetic compressor, Fig. 2 is a partially enlarged cross-sectional view of the hermetic container, and Fig. 3 is a longitudinal sectional view of the hermetic container of the same compressor. Fig. 4 is a partially enlarged vertical sectional view of the hermetic container, Fig. 6 is a partially cutaway front sectional view of a rotary hermetic compressor according to an embodiment of the present invention, and Fig. 6 is similar to Fig. 5. FIG. 7 is an enlarged cross-sectional view taken along the line V+-■, and FIG. 7 is an enlarged cross-sectional view taken at the section ■ shown in FIG. 3... Airtight container, 4... Vibration-proof radiation zone,
4a... Pedestal part, 4b... Radiation fin part, 5... Stator, 6... Cylinder block. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure α 9- Figure 3 Figure 5

Claims (1)

[Claims] A stator of an electric motor element and a cylinder block of a rotary compression mechanism element driven by the electric motor element are fixed to the inner wall surface of the airtight container, and the entire cylinder block and the fixed cylinder block are fixed to the outer periphery of the airtight container. A hermetic rotary compressor with a vibration-isolating radiation zone tightly wrapped around it so as to cover at least a portion of the rotary compressor.