JPH11107960A - Closed type motor compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the water-tightness of a terminal connection part of a closed type compressor so as to prevent moisture from entering and pooling in a terminal cover in order to avoid deteriorating the insulation between high voltage terminals even though the compressor is splashed with a large volume of water or from being submerged in water. SOLUTION: A porous film 15 having micro-pores is set in a part of a terminal cover 9 so that the atmospheric pressure in the terminal cover 9 is maintained constant by the porous film 15 even though the atmospheric temperature varies, and accordingly, no moisture such as steam enters into the terminal cover 9 through a harness 8. Further, even if the closed compressor is splashed with liquid such as shower-like water or is submerged in water, the porous film 15 can check moisture from passing therethrough, and accordingly, no moisture can enter the terminal cover 9. Thus, it is possible to prevent the electrical insulation of the terminal part from being deteriorated by dew condensation water or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic electric compressor having a terminal portion used for an air conditioner or the like.

[0002]

2. Description of the Related Art As shown in FIG. 8, a terminal around a terminal of a conventional hermetic electric compressor is provided with a terminal 102 on an outer surface of a sealed container 101, and a gasket 103 is set around the terminal 102. The terminal cover 106 is fixed on the outer surface of the sealed container 101 via the gasket 107 and the nut 108 so that the harness 105 connected to the terminal 104 of the terminal 102 comes out of the outlet of the terminal cover 106.

[0003]

However, in the above-mentioned conventional configuration, when a large amount of water falls on the hermetic electric compressor or when the electric compressor is submerged, moisture is taken out of the harness 105 of the terminal cover 106 through the outlet. Even if the outlet of the harness 105 is made to have a closed structure, moisture invades and accumulates inside the terminal through the harness 105 due to the respiratory action due to the pressure difference between the inside and outside of the terminal cover. In some cases, the insulation between the terminals is deteriorated, and therefore, there has been a demand for an improvement in the watertightness of the terminal connection portions.

An object of the present invention is to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a hermetic electric compressor having a terminal portion in which watertightness is improved and water does not accumulate inside.

[0005]

Means for Solving the Problems In order to achieve the above object, a hermetic electric compressor according to the present invention is provided with a porous membrane having fine holes installed in a part of a terminal cover covering a terminal portion. It is.

[0006] According to the above-described structure, the installation of the porous film having fine pores prevents moisture from penetrating and adhering to the terminal portion, and ensures electrical insulation between the high-voltage terminals.

[0007]

According to the first aspect of the present invention, a compressor element and a motor element having a drive shaft for driving the compressor element are provided inside a closed container, and are mounted on an outer peripheral surface of the closed container. With a porous membrane having micropores installed in a part of the terminal cover that covers the terminal part made, according to this configuration, the pressure inside and outside the terminal can be kept uniform by the porous membrane having micropores, Water can be prevented from entering the terminal cover.

According to a second aspect of the present invention, the porous membrane is bonded and fixed so as to cover one or more holes formed in a part of the terminal cover. By increasing the number, the adhesive force can be further increased, and peeling of the porous film due to invasion of foreign matter (external force or the like) from the outside can be prevented.

According to a third aspect of the present invention, a packing-like resilient material is attached to the outer peripheral portions of the front and back surfaces of the porous membrane, and is provided via a lid-like component having one or more holes. The terminal cover is fixed to a part of the terminal cover, and it is possible to prevent intrusion of moisture from around the porous membrane.

According to a fourth aspect of the present invention, the porous film is fused and fixed to a part of the terminal cover, so that operations such as attaching the porous film to the terminal cover can be omitted. Can be reduced.

According to a fifth aspect of the present invention, a resin component having the porous membrane is previously installed on a part of a terminal cover, and the resin component can be set as a standard product on any terminal cover. It is possible to increase the versatility of parts.

According to a sixth aspect of the present invention, a bolt fixed to the surface of the sealed container of the terminal portion is passed through a mounting hole provided in the terminal cover, and the terminal cover is fixed to the sealed container with a nut. Adhesion between the terminal cover and the sealed container can be made uniform.

According to a seventh aspect of the present invention, a packing-like repellent material is provided between the terminal cover and the closed container, and this structure improves the watertightness between the terminal cover and the closed container. be able to.

According to an eighth aspect of the present invention, a resilient harness holding component through which a harness penetrates is held and fixed in a closed container by a terminal cover. Watertightness can be improved.

An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a side view in which main parts and a part of the hermetic electric compressor of the first embodiment are cut away.

That is, as shown in the figure, the sealed container 1 is formed by seam welding a steel cylindrical shell 1a, an upper shell 1b, and a lower shell 1c. Closed container 1
Inside, a motor element 2 and a compressor element 3 are incorporated. The refrigerant gas is sucked from a suction pipe 4 welded and fixed to the lower shell 1c, is compressed in the compressor element 3, and then passes through the outer periphery of the motor element 2 and is fixed to the discharge pipe 5 welded to the upper shell 1b. Is discharged from. Reference numeral 6 denotes a glass terminal provided with a terminal 7 for passing electricity for driving the motor element 2. The glass terminal 6 is the upper shell 1b of the closed container 1.
(The outer peripheral surface of the sealed container), and is fixed. The terminal 7 of the glass terminal 6 is connected to an electric harness 8. The glass terminal 6 is covered by a terminal cover 9 on the outer peripheral surface of the closed container 1. The terminal cover 9 is connected to the closed container 1 via a first gasket 10, a second gasket 11, and a grommet 12 holding a harness 8. It is tightly fixed on the sealed container 1 by a stud bolt 13 and a flange nut 14 welded to the surface.

A portion of the terminal cover 9, that is, a top surface portion in the figure, is provided with a porous film 15 having fine holes. The porous membrane 15 has a 1 cm ² per hundreds of millions of micropores, through the gas, such as air or water vapor, satisfying simultaneously waterproof and dustproof and a breathability that repels liquids such as greater water contact angle function And air pressure (air pressure) inside and outside the terminal cover 9 while maintaining watertightness.
Can be adjusted. Also, the porous membrane 15
It has excellent properties such as water repellency, heat resistance, chemical resistance, weather resistance, and electrical insulation.

With the above structure, even if a change in air temperature occurs, the pressure inside and outside the terminal cover 9 is kept constant by the porous film 15, so that the air enters the terminal cover 9 through the core wire of the harness 8. The accumulated water vapor does not accumulate due to condensation. Further, even when a liquid such as shower-like water is splashed on the hermetic electric compressor or when it is submerged, the porous membrane 15 does not allow moisture to pass through, so that moisture does not enter the terminal cover 9. For this reason, the electrical insulation of the glass terminal 6 (terminal portion) does not deteriorate.

FIGS. 2 (a) and 2 (b) show a terminal cover according to the second embodiment. As shown in FIG. That is, here, a plurality of holes 16 are formed, and the porous film 15 is adhered and fixed from the inside of the terminal cover 9. With this configuration, since the porous film 15 is covered with the outside and the plurality of holes, damage to the porous film 15 due to foreign matter from the outside can be reduced, and the porous film 15 due to foreign matter and the like can be reduced. 15 is reduced, and the bonding area between the terminal cover 9 and the porous film 15 is increased, so that the bonding strength can be increased.

FIGS. 3 (a) and 3 (b) are views showing a terminal cover portion of the third embodiment. As shown in FIG.
The terminal cover 9 has a part of the top surface formed in a concave shape, a plurality of holes 16 similar to the above are formed in the concave bottom portion, and the outer peripheral portion is sandwiched between two ring-shaped packings 17 (repellent material). The porous membrane 15 is disposed on a hole in the concave bottom, and the porous membrane 15 is sandwiched and fixed to the terminal cover 9 by a lid 18 (lid-like component) having a plurality of holes 16 formed thereon. Thus, the use of the packing 17 can reliably prevent moisture from entering the terminal cover 9.

FIGS. 4 (a) and 4 (b) show a terminal cover according to the fourth embodiment. As shown in FIG. 4, the porous film 15 has a hole opened in the top surface of the terminal cover 9. 19, which are fixed by fusion or by integral molding. Thereby, the porous film 15 can be formed integrally with the terminal cover 9, and the upper shell 1 of the terminal cover 9 can be formed.
The number of assembling steps for b can be greatly reduced.

FIGS. 5 (a) and 5 (b) show a terminal cover portion according to a fifth embodiment. As shown in FIG. 5, a resin part 20 formed by fusing a porous film 15 is formed. Is fixed to the top surface of the terminal cover 9. With this configuration, the resin component 20 can be set as a separate component, and can be provided with versatility so that it can be attached to another terminal cover.

FIGS. 6 (a) and 6 (b) show a terminal cover according to the sixth embodiment. As shown in FIG. And a bolt 24 welded and fixed to the upper shell 1b is erected at the center of the terminal 23,
The terminal cover 21 is fixed to the upper shell 1b by a flange nut 26 through an O-ring 25 made of a resilient material between the upper shell 1b and the terminal 23 through the mounting hole 22 of the terminal cover 21 through the bolt 24,
With this configuration, the terminal cover 21 is
Can be fixed so as to be pressed against the upper shell 1b with substantially even force, whereby the water tightness of the O-ring 25 can be improved.

FIGS. 7 (a) and 7 (b) show a terminal cover according to a seventh embodiment. As shown in FIGS.
The harness 28 passed through the grommet 27 (harness holding component) is fixed by a terminal cover 29 on the upper shell 1b via a stud pin 30 erected on the upper shell 1b and a flange nut 31. In this configuration, the grommet 27 is tightly held between the terminal cover 29 and the upper shell 1b, so that the harness 28
Is adhered to the grommet 27 to improve watertightness.

As described above, the structure of the porous membrane 15 and the structure for maintaining the water tightness around the terminal cover keep the air pressure inside and outside the terminal cover constant, and do not accumulate moisture in the terminal cover. The electrical insulation of the terminal part can always be ensured.

[0026]

As is apparent from the above embodiment, the first aspect of the present invention is a closed type having a compressor element and a motor element having a drive shaft for driving the compressor element in a closed container. In an electric compressor, a part of a terminal cover that covers a terminal part provided on an outer peripheral surface of a sealed container is provided with a porous membrane having fine pores. Since the air pressure inside and outside the cover is kept constant by the porous film, the outside moisture and the like are not sucked into the terminal cover through the harness, so that dew condensation does not occur. In addition, even when a shower-like liquid such as water is splashed on the hermetic electric compressor or when submerged, the porous membrane does not allow moisture to pass through, so that moisture does not enter the inside of the terminal cover. This has the effect of not deteriorating the insulation.

According to a second aspect of the present invention, at least one or more holes are formed in a part of the terminal cover, and a porous film having fine holes is provided so as to close the holes. According to this, since the porous film is covered with one or more holes, damage to the porous film due to foreign matter from outside is reduced, and the bonding area between the terminal cover and the porous film is increased, and Power can be increased.

According to a third aspect of the present invention, a packing-like repellent material is provided on the outer peripheral portions of the front and back surfaces of a porous film having fine pores, and is provided via a lid-like component having one or more holes. It is fixed to one or more holes provided in the terminal cover, and according to this configuration, by using a packing-like repellent material,
This has the effect of reliably preventing the intrusion of moisture from around the porous membrane into the terminal cover.

According to a fourth aspect of the present invention, a porous film having fine pores is fused and fixed to a part of the terminal cover. With this structure, the porous film is integrally formed with the terminal cover. Can significantly reduce the number of assembly steps.

According to a fifth aspect of the present invention, a resin component provided with a porous film having fine holes is fixed to a part of a terminal cover. According to this configuration, the resin component is provided as a separate component. It can be set and versatile so that it can be attached to other terminal covers.

According to a sixth aspect of the present invention, a mounting hole is provided in a part of a terminal cover holding a porous membrane having fine holes, and a bolt welded and fixed to the surface of the sealed container in the terminal portion is provided in the mounting hole. Through this, the terminal cover is fastened and fixed to the closed container with a nut. According to this configuration, there is an effect that the terminal cover can be fixed on the closed container with a uniform force.

According to a seventh aspect of the present invention, a packing-like repellent material is provided between the terminal cover and the closed container. According to this configuration, the watertightness between the terminal cover and the upper shell is provided. The effect of improving is produced.

According to an eighth aspect of the present invention, the harness holding component through which the harness penetrates is held and fixed in the closed container by the terminal cover. According to this configuration, the harness and the harness holding component are fixed. Are more closely adhered to each other, so that the watertightness is improved.

[Brief description of the drawings]

FIG. 1 is a side view of a hermetic electric compressor according to a first embodiment of the present invention, showing a main part and a part thereof cut away.

FIG. 2A is a partially cutaway plan view of a terminal cover portion according to the second embodiment, and FIG. 2B is a side sectional view of FIG.

FIG. 3A is a partially cutaway plan view of a terminal cover portion according to the third embodiment, and FIG. 3B is a side sectional view of FIG.

FIG. 4A is a partially cutaway plan view of a terminal cover portion according to the fourth embodiment, and FIG. 4B is a side sectional view of FIG.

FIG. 5A is a partially cutaway plan view of a terminal cover according to the fifth embodiment, and FIG. 5B is a side sectional view of FIG.

FIG. 6A is a plan view of a hermetic electric compressor in which a terminal cover of the sixth embodiment is partially cut away, and FIG. 6B is a partial side view in which the terminal cover portion of FIG.

FIG. 7A is a plan view of the hermetic electric compressor in which the terminal cover is partially cut away, showing the seventh embodiment. FIG. 7B is a plan view of the terminal cover shown in FIG. Chipped side view

FIG. 8 is a partially cutaway side view of a conventional hermetic electric compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airtight container 2 Motor element 3 Compressor element 6 Glass terminal (terminal) 8, 28 Harness 9, 21, 29 Terminal cover 12, 27 Grommet (Harness holding part) 15 Porous membrane 16, 19 hole 17 Packing (repellency) Materials) 18, 21 Lid (lid-like part) 20 Resin part 22 Mounting hole 24 Bolt 25 O-ring (repellent material) 26 Flange nut (nut)

Claims (8)

[Claims] In a hermetic electric compressor having a compressor element and a motor element having a drive shaft for driving the compressor element in a hermetic container, a terminal portion provided on an outer peripheral surface of the hermetic container is provided. A hermetic electric compressor comprising a porous membrane having micropores in a part of a terminal cover to be covered. 2. The terminal cover according to claim 1, wherein at least one or more holes are formed in a part of the terminal cover, and a porous film having fine holes is provided so as to close the holes. Hermetic electric compressor. 3. The terminal device according to claim 1, wherein the porous membrane having the micropores has a packing-like repellent material on the front and back sides thereof and a part of the terminal cover via a lid-like component having at least one or more holes. 3. The hermetic electric compressor according to claim 2, wherein the compressor is fixed to the compressor. 4. The hermetic electric compressor according to claim 1, wherein the porous membrane having micropores is fused and fixed to a part of the terminal cover. 5. The hermetic electric compressor according to claim 1, wherein a resin component having a porous film having fine holes is fixed to a part of the terminal cover. 6. A mounting hole is provided in the terminal cover,
2. The hermetic electric compressor according to claim 1, wherein a bolt fixed to the surface of the sealed container of the terminal portion is passed through the mounting hole, and the terminal cover is fixed to the sealed container by a nut. 7. The hermetic electric compressor according to claim 1, wherein a packing-like repellent material is provided between the terminal cover and the closed container. 8. The hermetic electric compressor according to claim 1, wherein the resilient harness holding component through which the harness penetrates is held and fixed in the closed container by the terminal cover.