JPH11303744A - Hermetic compressor - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent breakage of an airtight terminal due to abnormally high pressure inside a sealed container. A cup-shaped metal body of an airtight terminal is provided.
The thickness of the bottom flat part 7 is made thicker than the thickness of the cylindrical side wall 8 of the cup-shaped metal body 9, so that the pressure inside the closed vessel rises abnormally, the upper end plate 1 is deformed, and stress is applied to the airtight terminal 11. Even if it is applied, the cylindrical side wall 8 of the cup-shaped metal body 9 absorbs the stress, and the bottom flat portion 7 of the cup-shaped metal body 9 is not deformed. I can do it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor used as a refrigerant compressor or air compressor for refrigeration and air conditioning.

[0002]

2. Description of the Related Art Conventionally, this type of compressor has an upper end plate 101, a body 102, and a lower end plate 103 as shown in FIG.
, A compression mechanism 10
5 and a motor 106 for driving the compression mechanism 105 are fixed, and the power source of the motor 106 is a conductive pin 108 insulated with glass on the bottom flat surface of the cup-shaped metal body 107 fixed to the closed container 104 by welding. Sealed terminal 109 having
Via an external power supply (not shown).

[0003] The refrigerant is compressed by a compression mechanism 105 from a suction pipe 110 connected to a refrigeration cycle (not shown), becomes a high pressure, is discharged into a sealed container 104, and is returned from a discharge pipe 111 to a refrigeration cycle (not shown).

[0004]

However, in the above-mentioned conventional structure, when the inside of the sealed container becomes abnormally high in pressure, the upper head plate bulges outward, and the deformation causes stress on the cup-shaped metal body of the airtight terminal to deform. However, there is a risk that the glass seal portion is broken, the high-temperature and high-pressure refrigerant leaks to the outside, and the conductive pins jump out.

The present invention solves such a conventional problem, and prevents the glass seal of an airtight terminal from cracking due to an abnormally high pressure inside a sealed container. Another object of the present invention is to provide an inexpensive compressor without using materials or the like even when using a mixed refrigerant containing the same.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for reducing the stress from the cup-shaped metal body of the airtight terminal even if the pressure in the sealed container becomes high and the upper plate is deformed. It is shaped to absorb. Due to the above shape, even if the upper end plate is deformed, the stress applied to the airtight terminal can be reduced, and the glass seal of the airtight terminal can be prevented from cracking.

[0007]

According to a first aspect of the present invention, a cup-shaped metal body of an airtight terminal has a plate thickness at a bottom flat portion which is larger than a plate thickness at a cylindrical side wall. . As a result, even if the pressure inside the sealed container rises abnormally and the upper head plate is deformed and stress is applied to the airtight terminal, the cylindrical side wall of the cup-shaped metal body absorbs the stress and the bottom flat portion is deformed. Therefore, the glass seal is protected.

According to a second aspect of the present invention, a rib for absorbing distortion applied to the glass seal portion of the airtight terminal is provided.

According to a third aspect of the present invention, a rib is provided on the cylindrical side wall of the cup-shaped metal body of the hermetic terminal, and the rib relieves stress on the glass insulating terminal.

According to a fourth aspect of the present invention, a rib is provided on the outer periphery of the flat bottom surface of the cup-shaped metal body of the airtight terminal, the rib absorbs distortion, and relieves stress on the glass seal.

According to a fifth aspect of the present invention, a rib is provided on the outer periphery of the glass seal portion on the bottom surface of the cup-shaped metal body of the hermetic terminal, and the rib alleviates the stress on each of the glass insulating terminals.

According to a sixth aspect of the present invention, a stress acting on the hermetic terminal is reduced by providing a rib for preventing deformation on the outer periphery of the hermetic terminal of the hermetic container.

According to a seventh aspect of the present invention, the hermetic terminal is made of a base metal body made of an iron plate thicker than the hermetic container to which the thickness of the hermetic terminal is welded, thereby preventing the hermetic terminal from being deformed due to the deformation of the hermetic container.

According to the present invention, only one conductive pin is provided on the bottom flat portion to reduce the area of the bottom flat portion of the cup-shaped metal body and to reduce the force applied to the bottom flat portion. A plurality of terminals are provided in a closed container.

According to a ninth aspect of the present invention, the thickness of the upper end plate of the closed vessel to which the airtight terminal is welded is made thicker than the body of the closed vessel.

According to a tenth aspect of the present invention, the cup-shaped metal body of the airtight terminal which is easily deformed is eliminated, the conductive pins are inserted directly into the closed container, and the periphery thereof is insulated and sealed by a glass seal portion.

An eleventh aspect of the present invention relates to a high-pressure refrigerant HF
It is implemented with C32 or a refrigerant containing it, and is more effective.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) In FIGS. 1 and 2, a compression mechanism 5 and a compression mechanism 5 are driven inside a cylindrical hermetic container 4 composed of an upper head 1, a body 2, and a lower head 3. The motor 6 is fixed and the power supply of the motor 6 is hermetically welded to the sealed container 4.
It is supplied from an external power supply (not shown) through a hermetic terminal 11 having a conductive pin 10 insulated by a glass seal 14 to a thicker cup-shaped metal body 9.

The refrigerant is compressed by a compression mechanism 5 from a suction pipe 12 connected to a refrigeration cycle (not shown), becomes a high pressure, discharged into the closed vessel 4, and returned from a discharge pipe 13 to a refrigeration cycle (not shown).

In the above configuration, when the ventilation of the condenser in the refrigeration cycle is obstructed, or when the refrigerant is abnormally charged, the pressure in the sealed container 4 is abnormally increased, and in particular, the upper head plate formed by sealingly welding the airtight terminal 11. Although stress concentrates on the upper end plate 1 and causes deformation of the upper end plate 1, since the cylindrical side wall 8 of the cup-shaped metal body 9 of the airtight terminal 11 is configured to be thinner than the bottom flat portion 7, the upper end plate 1 is deformed. The stress on the hermetic terminal 11 due to the deformation of the airtight terminal 11 is absorbed by the cylindrical side wall 8, the deformation of the bottom plane portion 7 can be prevented, the glass seal 14 that insulates and seals the conductive pin 10 is prevented from cracking, and It is possible to eliminate dangers such as leakage and jumping out of the conductive pins 10.

(Embodiment 2) FIG.
The rib 1 is attached to the cylindrical side wall 8 near the welding position with the upper head 1
5 is provided. With this configuration, even if the upper end plate 1 is deformed, the deformation is absorbed at the lower part of the rib 15 and the deformation of the bottom plane portion 7 can be prevented.

(Embodiment 3) FIG.
A rib 16 is provided on the outer periphery of the bottom plane portion 7 of the base member, and the stress on the glass seal 14 is reduced by the rib 16 so that the glass seal 14
Cracking can be prevented.

(Embodiment 4) FIG.
Ribs 17 are provided on the outer periphery of the glass seal 14 on the bottom flat surface portion 7, stresses on the individual glass seals 14 are alleviated by the ribs 17, and breakage of the glass seal 14 can be prevented.

(Embodiment 5) FIG. 6 shows that the upper end plate 1 near the airtight terminal 11 is provided with a rib 19 against deformation so that the deformation of the upper end plate 1 near the airtight terminal 11 is reduced. 9 is to reduce the stress applied.

(Embodiment 6) FIG.
Is composed of the base metal body 18 which is sufficiently thicker than the upper head plate 1 so that even if the upper head plate 1 is deformed,
Is not deformed, so that the glass seal 14 does not crack.

(Embodiment 7) FIG. 8 shows that a glass seal 1 is attached to the cup-shaped metal body 9 in order to reduce the area of the bottom plane part 7 of the cup-shaped metal body 9 and reduce the force applied to the bottom plane part 7.
The upper end plate 1 is provided with a plurality of hermetic terminals 11 each provided with only one conductive pin 10 sealed by the reference numeral 4.
According to this configuration, since the bottom plane portion 7 is small, the rigidity of the bottom plane portion is high, and the influence of stress on the glass seal 14 is reduced. In addition, by arranging the individual airtight terminals 11 at arbitrary high rigidity positions of the upper end plate 1, a highly safe compressor can be provided.

(Eighth Embodiment) FIG.
Is made thicker than the thickness of the body part 2. Thereby, the rigidity of the upper end plate 1 that is easily affected by the deformation due to the internal pressure increases, and a highly safe compressor can be provided.

(Embodiment 9) FIG. 10 shows a case where a cup-shaped metal body of an airtight terminal which is easily deformed is eliminated, and conductive pins 10 are inserted into a plurality of holes 20 formed in the upper end plate 1, and the periphery thereof is sealed with a glass. 14 insulated. According to this configuration, a highly safe compressor can be provided only by improving the rigidity of the upper end plate 1 (for example, changing the shape or increasing the plate thickness).

Further, when it is used for HFC32, which is a high-pressure refrigerant, or a mixed refrigerant containing it, it is more effective.

[0031]

As is apparent from the above embodiment, according to the first aspect of the present invention, the plate thickness of the bottom flat portion of the cup-shaped metal body of the airtight terminal is made larger than the plate thickness of the cylindrical side wall. Due to this, even if the pressure inside the sealed container rises abnormally and the upper head plate is deformed and stress is applied to the airtight terminal, the cylindrical side wall absorbs the stress and the bottom flat part does not deform, so the glass seal of the airtight terminal Is protected.

As described in the second aspect of the present invention, by providing the ribs, the glass seal is protected by absorbing the strain applied to the glass seal portion of the airtight terminal.

According to the third aspect of the present invention, a rib is provided on the cylindrical side wall of the cup-shaped metal body of the hermetic terminal, and the stress on the glass insulating terminal is alleviated by the rib, so that the above-described effect can be obtained.

According to a fourth aspect of the present invention, a rib is provided on the outer periphery of the cup-shaped metal body bottom flat portion of the airtight terminal, the rib absorbs distortion, and relieves stress on the glass seal.
The above effects can be obtained.

According to a fifth aspect of the present invention, a rib is provided on the outer periphery of the glass seal portion on the bottom surface of the cup-shaped metal body of the hermetic terminal, and the stress on each glass insulated terminal is reduced by the rib. The effect of is obtained.

According to the sixth aspect of the present invention, the stress applied to the hermetic terminal portion is reduced by providing a rib for preventing deformation on the outer periphery of the hermetic terminal of the hermetically sealed container, and the above-mentioned effects can be obtained.

According to a seventh aspect of the present invention, the airtight terminal is formed of a base metal body made of an iron plate thicker than a closed container to which the thickness of the airtight terminal is welded, thereby preventing deformation of the airtight terminal due to deformation of the closed container. Due to the high airtight terminal, no stress is applied to the glass seal, and a highly reliable compressor can be provided.

According to the present invention, in order to reduce the area of the bottom flat portion of the cup-shaped metal body and to reduce the force applied to the bottom flat portion, only one conductive pin is provided on the bottom flat portion, and a glass-sealed hermetic seal is provided. Since a plurality of terminals are provided in the closed container, the rigidity of the hermetic terminal itself is improved, and the effect of the hermetic terminal deformation due to the deformation of the upper end plate can be reduced, and the above-described effects can be obtained.

According to the ninth aspect of the present invention, the thickness of the upper end plate of the closed vessel to which the airtight terminal is welded is made thicker than the body of the closed vessel, so that the deformation of the closed vessel itself can be suppressed small, and the above-mentioned effects can be obtained. .

According to a tenth aspect of the present invention, the conductive pins are inserted directly into the closed container, and the periphery thereof is insulated and sealed with a glass seal portion. Since there is no easily deformable airtight terminal cup-shaped metal body, A sealed container that can withstand higher pressures can be provided. Furthermore, it is also possible to freely dispose the upper end plate at a place where the strength is strong.

It is more effective to use HFC32, which is a high-pressure refrigerant, or a refrigerant containing the same.

[Brief description of the drawings]

FIG. 1 is a sectional view of a hermetic compressor showing one embodiment of the present invention.

FIG. 2 is a sectional view of FIG. 1 showing the glass terminal of the present invention.

FIG. 3 is a cross-sectional view of a glass terminal showing another embodiment of the present invention.

FIG. 4 is a cross-sectional view of a glass terminal showing still another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a glass terminal showing still another embodiment of the present invention.

FIG. 6 is a sectional view of a weschel showing still another embodiment of the present invention.

FIG. 7 is a sectional view of a glass terminal showing still another embodiment of the present invention.

FIG. 8 is a cross-sectional view of a glass terminal showing still another embodiment of the present invention.

FIG. 9 is a cross-sectional view of a weschel showing still another embodiment of the present invention.

FIG. 10 is a sectional view of a weschel showing another embodiment of the present invention.

FIG. 11 is a sectional view of a conventional hermetic compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top end plate 7 Bottom plane part 8 Cylindrical side wall 9 Cup-shaped metal body 10 Conductive pin 11 Airtight terminal 14 Glass seal 15, 16, 17, 19 Rib 18 Base metal body 20 hole

Claims (11)

[Claims] An electric motor and a compression mechanism driven by the electric motor are provided inside a closed container, and a hermetic terminal hermetically welded to the closed container to supply the electric motor power from outside the closed container is a cup-shaped metal. A closed body comprising a body, a conductive pin, and a glass seal portion that insulates the cup-shaped metal body from the conductive pin, wherein the thickness of the cylindrical side wall of the cup-shaped metal body is smaller than the thickness of the bottom flat portion of the cup-shaped metal body. Type compressor. 2. An electric motor and a compression mechanism driven by the electric motor are disposed inside the closed container, and an airtight terminal hermetically welded to the closed container to supply the electric power from the outside of the closed container is a cup-shaped metal. A hermetic compressor comprising a body, a conductive pin, and a glass seal portion for insulating the cup-shaped metal body and the conductive pin, and having a rib for absorbing distortion so as to surround the glass seal portion. 3. The hermetic compressor according to claim 2, wherein a rib is provided on a cylindrical side wall of the cup-shaped metal body. 4. The hermetic compressor according to claim 2, wherein a rib is provided on a bottom flat portion of the cup-shaped metal body so as to surround a plurality of glass seal portions. 5. The hermetic compressor according to claim 2, wherein ribs are provided so as to surround the glass seal portions on the bottom flat surface of the cup-shaped metal body. 6. The hermetic compressor according to claim 2, wherein a rib is provided in the hermetic container so as to surround the outer peripheral welded portion of the hermetic terminal. 7. An electric motor and a compression mechanism driven by the electric motor are disposed inside the closed container, and an airtight terminal hermetically welded to the closed container to supply the electric power of the motor from outside the closed container is a base metal body. And a conductive pin and a glass seal portion that insulates the base metal body and the conductive pin,
A hermetic compressor in which the thickness of the base metal body is greater than the thickness of the hermetically sealed container. 8. An electric motor and a compression mechanism driven by the electric motor are provided inside the closed container, and an airtight terminal for supplying the electric power from the outside of the closed container is provided with a cup-shaped metal body and one conductive pin. A hermetic compressor comprising a glass seal portion that insulates the cup-shaped metal body from the conductive pins, and hermetically welds a plurality of independent hermetic terminals for each terminal to a hermetic container. 9. The airtight terminal according to any one of claims 1 to 8, wherein the closed container is constituted by a body portion and a head plate portion, the plate thickness of the head plate portion is made larger than that of the body portion, and an airtight terminal is hermetically welded to the head plate portion. Hermetic compressor. 10. An electric motor and a compression mechanism driven by the electric motor are disposed inside the closed container, the closed container is constituted by a body and a head plate, and conductive pins are provided in a plurality of holes formed in the head plate. And hermetically sealed with glass seals around them, and used as an airtight terminal to supply electric motor power from outside the sealed container. 11. The hermetic compressor according to claim 1, wherein HFC32 or a mixed refrigerant containing the same is used as the refrigerant.