JP2002266760A - Hermetic electric compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hermetic electric compressor capable of effectively preventing the breaking of a terminal and the occurrence of gas leakage even if the inside of the hermetic container is highly pressurized. SOLUTION: This two-stage compression type compressor 10 is provided with an electric element 14 in the hermetic container 12, compression elements 32 and 34 driven by the electric element, and a terminal 20 attached to the hermetic container. The terminal 20 is provided with a circular base part 3 through which an electric terminal 2 penetrates and is attached and an attachment part 4 formed in the circumference of the base part and welded and fixed to the circumferential part of an attachment hole 12C of the hermetic container. The attachment part is so set as to be deformable in its whole circumference relative to the base part.

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 provided with an electric element and a compression element driven by the electric element in a closed container.

[0002]

2. Description of the Related Art Conventionally, this type of hermetic electric compressor is provided with an electric element composed of a motor such as an induction motor and a DC motor and a rotary compression element in a hermetic container, and a terminal mounted on the hermetic container. The electric element is operated by supplying electric power, and the compression element is driven to compress the refrigerant.

In recent years, due to the problem of destruction of the global environment, conventionally used CFC refrigerants cannot be used, and natural refrigerants such as carbon dioxide (CO ₂ ) have been used.

[0004]

Here, since the refrigerant such as carbon dioxide has a large difference between high and low pressures, the pressure of the refrigerant discharged from the compression element is set to an extremely high value such as 3 MPa to 10 MPa as compared with the conventional refrigerant. Reach. For this reason, the pressure inside the closed container increases due to the pressure of the refrigerant discharged from the compression element, which causes a problem that the terminal attached to the closed container is broken.

That is, the terminal has a circular shape in order to receive the pressure from the inside of the closed container uniformly, and the mounting portion formed on the entire periphery of the base portion is completely inserted into the circular mounting hole formed in the closed container. It is fixed by welding over the circumference. Conventionally, the terminal itself is formed by pressing a steel plate having a thickness of about 1.7 mm, and an electric terminal for energizing the electric element penetrates a base portion of the terminal and is fixed by a glass seal. And it was.

However, when the pressure in the sealed container is increased by using the refrigerant as described above, the base portion of the terminal is deformed in a direction to expand outward, and the glass seal and the electric terminal are blown off.

Therefore, it is conceivable that the thickness of the base portion of the terminal is made thicker than before so as to increase the strength of the base portion to prevent deformation, but the sealed container itself expands outward due to the high internal pressure. To deform in the direction
The periphery of the mounting hole also deforms outward. For this reason, distortion due to stress concentrates on the welded portion between the terminal mounting portion and the sealed container, which causes a problem that the sealing is broken and the refrigerant gas inside leaks (gas leak).

The present invention has been made to solve the above-mentioned conventional technical problem, and it is possible to effectively prevent the destruction of the terminal and the occurrence of gas leak even when the pressure in the sealed container becomes high. It is intended to provide a hermetic electric compressor that can be used.

[0009]

The hermetic electric compressor according to the present invention comprises an electric element in a closed container and a compression element driven by the electric element. A circular base portion through which the electrical terminals are mounted, and a terminal formed around the base portion and fixedly welded to a periphery of the mounting hole of the closed container. And the mounting portion is capable of being deformed over the entire circumference with respect to the base portion.

Further, in the hermetic electric compressor according to the present invention, in the above, the mounting portion of the terminal extends in a direction from the periphery of the base portion to the inside of the hermetic container. A slit cut from the surface inside the closed container is formed over the entire circumference between the base and the base.

According to the present invention, in a hermetic electric compressor having an electric element in a closed container and a compression element driven by the electric element, a terminal attached to the closed container is provided, The terminal has a circular base portion through which the electric terminal is mounted, and a mounting portion formed around the base portion and fixed by welding to a peripheral portion of a mounting hole of the closed container. Since the portion can be deformed over the entire circumference with respect to the base portion, a CO ₂ refrigerant is used as the refrigerant gas as in claim 4, and the pressure inside the closed container becomes high, and the closed container around the mounting hole will be deformed. Also in this case, the mounting portion deforms following deformation around the mounting hole of the closed container.

Therefore, even when the base portion of the terminal is made thicker than the mounting portion to increase the strength of the base portion and prevent deformation of the terminal portion, the mounting portion is deformed to prevent deformation of the sealed container. It becomes possible to absorb over the entire circumference. This makes it possible to eliminate the disadvantage of gas leakage occurring between the terminal and the mounting hole of the sealed container over the entire periphery of the terminal while improving the strength of the terminal.

According to the second aspect of the present invention, in addition to the above, the mounting portion of the terminal extends in a direction from the periphery of the base to the inside of the hermetic container, and is provided between the mounting portion and the base. Since a slit cut from the inner surface of the closed container is formed over the entire periphery, the slit allows the mounting portion to expand outward from the base portion over the entire periphery of the terminal. Deformable.

Thus, the deformation of the sealed container can be absorbed by the mounting portion with a simple structure, and the cost increase can be kept low. In addition, the presence of the slit makes it difficult for the welding heat when the mounting portion is fixed to the closed container to be transmitted in the direction of the electric terminals, and causes a defect that a crack occurs in a glass seal or the like generally used for mounting the electric terminals. Inconvenience can be prevented.

[0015]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional side view of a two-stage compression type compressor 10 having first and second compression elements 32 and 34 as an embodiment of the hermetic electric compressor of the present invention, and FIG. Each shows a top view. In each of the figures, reference numeral 10 denotes a two-stage compression compressor as a hermetic electric compressor. The two-stage compression compressor 10 includes a cylindrical hermetic container 12 made of a steel plate having a thickness of about 4.5 mm, and a hermetic container 12. And a rotary compression mechanism 18 comprising a first rotary compression element 32 and a second rotary compression element 34 driven by the rotary shaft 16 of the electric element 14. ing.

The hermetically sealed container 12 has an oil reservoir at the bottom, and the container body 1 containing the electric element 14 and the rotary compression mechanism 18.
2A and a bowl-shaped end cap (lid) 12B for closing an upper opening of the container body 12A.
A terminal (wiring omitted) 20 of the present invention, which is provided with three electric terminals (pins) 2 for supplying power to the power supply, is attached. The terminal 20 will be described later in detail.

The motor-driven element 14 has a stator 22 mounted annularly along the inner peripheral surface of the upper space of the closed casing 12.
And a rotor 24 inserted and arranged with a slight gap provided inside the stator 22. The rotor 24 is fixed to the rotating shaft 16 extending vertically through the center.

The stator 22 has a laminated body 26 in which ring-shaped electromagnetic steel sheets are laminated, and a stator coil 28 wound around the laminated body 26. Further, the rotor 24 is also formed of a laminated body 30 of electromagnetic steel sheets similarly to the stator 22, and the two constitute an AC motor (induction motor).
Instead of the AC motor, a DC motor (DC motor) having a permanent magnet embedded in the rotor can be used.

An intermediate partition plate 36 is sandwiched between the first rotary compression element 32 and the second rotary compression element 34. That is, the first rotary compression element 32 and the second rotary compression element 34 include an intermediate partition plate 36, cylinders 38 and cylinders 40 disposed above and below the intermediate partition plate 36, and the upper and lower cylinders 38 and 40. And upper and lower rollers 46 and 48 which are fitted to upper and lower eccentric portions 42 and 44 provided on the rotating shaft 16 with a phase difference of 180 degrees and rotate eccentrically, and an upper and lower cylinder which comes into contact with the upper and lower rollers 46 and 48 Upper and lower vanes (not shown) which partition the inside of the chamber 38 and 40 into a low pressure chamber side and a high pressure chamber side, respectively, an upper support member 54 which also serves as a bearing for the rotary shaft 16 by closing each opening surface of the upper and lower cylinders 38 and 40. It is composed of a member 56.

Upper support member 54 and lower support member 56
Are formed with suction passages 58, 60 and discharge muffling chambers 62, 64 which are appropriately communicated with the insides of the upper and lower cylinders 38, 40, and the openings of these discharge muffling chambers 62, 64 are closed by covers, respectively. . That is, the discharge muffling chamber 62 is closed by the upper cover 66 as a cover, and the discharge muffling chamber 64 is closed by the lower cover 68 as a cover. The discharge muffling chamber 64 and the space on the electric element 14 side of the upper cover 66 in the sealed container 12 are communicated with each other through a communication passage 63.

The upper cover 66 is connected to the second rotary compression element 34.
The opening of the discharge muffling chamber 62 communicating with the inside of the cylinder 38 is closed to partition the inside of the sealed container 12 between the discharge muffling chamber 62 and the electric element 14 side.

The upper support member 54 and the lower support member 56
Are provided with discharge ports 39 and 41 for communicating the insides of the cylinders 38 and 40 with the discharge muffling chambers 62 and 64. Each of the discharge ports 39 and 41 is always closed by a valve body (not shown) having elasticity, and the valve bodies are opened by the pressure of the high-pressure chamber. Further, the discharge port 39 provided in the second rotary compression element 34 is formed smaller in diameter than the discharge port 41 provided in the first rotary compression element 32. This corresponds to a situation where the volume flow rate of the refrigerant gas discharged from the discharge port 41 of the first rotary compression element 32 is larger than the volume flow rate of the refrigerant gas discharged from the discharge port 39 of the second rotary compression element 34. It is. In addition, the displacement volume of the second rotary compression element 34 is set to 55% of the displacement volume of the first rotary compression element 32.
It is set to at least 85%.

That is, since the diameter of the discharge port 39 of the second high-pressure rotary compression element 34 is made smaller than the diameter of the discharge port 41 of the low-pressure first rotary compression element 32, the pressure of the first high-pressure rotary compression element 32 is reduced. The loss can be reduced and the performance of the two-stage compression type compressor 10 can be maximized. Further, by reducing the pressure loss, the compression balance between the first rotary compression element 32 and the second rotary compression element 34 becomes uniform, so that vibrations due to torque fluctuations of the two-stage compression compressor 10 are also effectively reduced. It is possible to improve efficiency.

On the other hand, among the elements constituting the rotary compression mechanism 18, the upper support member 54, the cylinder 38,
Intermediate partition plate 36, cylinder 40 and lower support member 56
Are arranged in this order, and are integrally connected and fixed together with the upper cover 66 and the lower cover 68 using a plurality of mounting bolts 78, 78A. In the lower part of the rotating shaft 16, a vertical oil hole 80 is formed at the center of the shaft, and a horizontal oil supply hole (not shown) is formed in the oil hole 80.

In this embodiment, carbon dioxide (CO ₂ ) as an example of carbon dioxide, which is a natural refrigerant in consideration of flammability and toxicity, is friendly to the global environment as a refrigerant.
As the oil as a lubricating oil, existing oils such as mineral oil (mineral oil), alkylbenzene oil, ether oil and ester oil are used.

On the other hand, it is well known that the reliability of the bearing made of carbon is higher than that of iron made of iron, and the bearing portions of the upper support member 54 and the lower support member 56 with the rotating shaft 16 are made of carbon. It is made of material.

The upper support member 54 and the lower support member 5
6 includes suction passages 58, 60 and discharge muffling chambers 62, 64.
The refrigerant introduction pipes 92 and 94 for introducing the refrigerant gas to the upper and lower cylinders 38 and 40 via the refrigeration pipes are connected to the refrigerant discharge pipes 96 and 98 for discharging the compressed refrigerant gas. The refrigerant introduction pipes 92 and 94 and the refrigerant discharge pipes 96 and 98 are fixed to the collar 143. A mounting pedestal 110 is provided on the bottom surface of the sealed container 12.

Next, an outline of the operation of the above embodiment will be described. The two-stage compression type compressor 10 of the embodiment is used, for example, as a hot water supply device (not shown). Normally, the hot water supply device is composed of a heat source unit and a hot water tank unit. The heat source unit is connected from the refrigerant discharge pipe 96 on the outlet side of the two-stage compression type compressor 10 to the refrigerant pipe 106 on the inlet side of the heat exchanger for water heating, The outlet pipe of the heat exchanger for water heating is connected to an expansion valve and an evaporator, and the refrigerant pipe on the outlet side of the evaporator is connected to the refrigerant inlet pipe 9 of the two-stage compression compressor 10.
2 is connected.

In the hot water tank unit, a water pipe provided in a general household is connected to one of hot water storage tanks for temporarily storing hot water, and the water pipe branches off before being connected to the hot water storage tank and is pumped. , A solenoid valve, and piping. The pipe exits the hot water tank unit, passes through the heat exchanger for water heating in the heat source unit, and is connected to the outlet pipe. The outlet pipe exits the heat source unit, reenters the hot water tank unit, and is connected to the hot water storage tank. The outlet pipe that has entered the hot water tank unit exits the hot water tank unit, and a faucet in a kitchen or a lavatory or a shower is connected thereto.

The operation of the two-stage compression type compressor 10 is as follows. First, when the coil 28 of the electric element 14 is energized through the electric terminals 2 of the terminal 20 and the wiring (not shown), the electric element 14 is started and the rotor is started. 24 rotates. By this rotation, the vertical eccentric portion 4 provided integrally with the rotating shaft 16
The upper and lower rollers 46 and 48 fitted to the upper and lower cylinders 44 rotate eccentrically in the upper and lower cylinders 38 and 40.

Thus, the low-pressure refrigerant gas sucked into the low-pressure chamber side of the cylinder 40 from the suction port via the refrigerant introduction pipe 94 and the suction passage 60 formed in the lower support member 56 is transferred to the roller 48 and the vane. Is compressed to an intermediate pressure (for example, 3 MPa) by the above operation, from the high pressure chamber side of the cylinder 40 to the discharge port 41, from the discharge muffling chamber 64 formed in the lower support member 56 to the refrigerant discharge pipe 98, and disposed outside the sealed container 12. The discharged refrigerant pipe 102 is discharged. still,
Part of the refrigerant gas discharged into the discharge muffling chamber 64 is
3 flows into the electric element 14 side of the upper cover 66 in the sealed container 12, and the same intermediate pressure is applied to the electric element 14 side in the sealed container 12 and the discharge muffling chamber 64.

Then, from the refrigerant pipe 102 to the refrigerant introduction pipe 9
The intermediate-pressure refrigerant gas sucked into the low-pressure chamber side of the cylinder 38 from the suction port via the suction passage 58 formed in the second and upper support members 54 is compressed in the second stage by the operation of the roller 46 and the vane. Performed at high temperature and pressure (eg, 1
0 MPa), and flows from the high-pressure chamber through the discharge port 39 to the discharge muffling chamber 6 formed in the upper support member 54.
2. It flows into the heat exchanger for water heating via the refrigerant discharge pipe 96 and the refrigerant pipe 106. Then, the high-temperature and high-pressure refrigerant gas radiates heat and exhibits a heat exchange action with water flowing through the inside of the pipe. Then, the refrigerant gas is throttled by the expansion valve and further cooled (heat radiated) by the evaporator. Is repeated into the first rotary compression element 32.

The water in the pipe, which has been heated by the heat exchange action in the heat exchanger for water heating, circulates in the hot water storage tank by the operation of the pump and the two-stage compression type compressor 10 with the solenoid valve opened. Water is warmed to a predetermined temperature. When the water in the hot water storage tank is heated to a predetermined temperature, the solenoid valve closes and the pump and the two-stage compression type compressor 10 stop. Then, when the hot water in the hot water storage tank is used in a kitchen, a washroom, a shower, or the like, the amount of water used is automatically replenished into the hot water storage tank from a water pipe. At this time,
Since the solenoid valve is closed, the hot water in the hot water storage tank is pushed out by the water flowing from the water supply pipe. When the temperature of the hot water storage tank becomes lower than a predetermined temperature, the solenoid valve opens and the pump,
The two-stage compression type compressor 10 operates to heat the water in the hot water storage tank to a predetermined temperature by the heat exchange action of the water heating heat exchanger.

With the rotation of the rotary shaft 16 as described above, the lubricating oil stored at the bottom of the sealed container 12 rises through a vertical oil hole 80 formed at the center of the rotary shaft 16 and is provided on the way. It flows out from the oil supply hole in the horizontal direction and is supplied to the bearing portion of the rotating shaft 16 and the upper and lower eccentric portions 42 and 44. As a result, the rotating shaft 16 and the vertical eccentric portion 4
2, 44 can perform smooth rotation.

As described above, the two-stage compression type compressor 10
Although the inside of the closed container 12 is set to an intermediate pressure, this pressure is extremely higher than that of a normal Freon refrigerant or the like. Therefore, the structure of the terminal 20 becomes a problem. Next, the structure of the terminal 20 of the present invention will be described with reference to FIGS. 3 is an enlarged cross-sectional view of the two-stage compression type compressor 10 at the terminal 20, FIG. 4 is a cross-sectional view of the terminal 20, FIG. 5 is a top view of the terminal 20, and FIG.

The terminal 20 is made of a steel plate and includes a circular base portion 3 and a mounting portion 4 extending from the periphery of the base portion 3 while expanding diagonally outward and downward (inward of the sealed container 12). . The base portion 3 has a thickness of about 6 mm and is at least stronger than the end cap 12B.
Are provided, and are fixed to the base portion 3 by the glass seal 7.

On the other hand, the thickness of the mounting portion 4 of the terminal 20 is about 1.75 mm, and the lower surface side (inward of the sealed container 12) is provided between the base of the mounting portion 4 and the base portion 3.
A slit 6 cut from the entire circumference is formed. The distance between the slit 6 and the upper surface of the base 3,
That is, the thickness of the base portion of the mounting portion 4 is also equal to the thickness of the mounting portion 4, and with such a configuration, the mounting portion 4 is positioned outside or obliquely above the base portion 3 as indicated by black arrows in FIG. It can be transformed into

On the other hand, the end cap 12 of the closed container 12
A flat portion 12D is formed on the upper surface of B (FIG. 2).
A circular mounting hole 12C is formed in the flat portion 12D. The inner diameter of the mounting hole 12C is larger than the outer dimension of the base 3 by a predetermined clearance so that the base 3 of the terminal 20 can be inserted.

Then, the terminal 20 is connected to the closed vessel 1
When attaching to terminal 2, first, base 3 of terminal 20 is inserted into attachment hole 12C from inside closed container 12 of end cap 12B, and attachment portion 4 is brought into contact with the periphery of attachment hole 12C. In this state, the mounting portion 4 is connected to the end cap 12 around the mounting hole 12C by projection welding.
B (FIG. 3).

As described above, since the inside of the closed container 12 is in an extremely high pressure state, the end cap 12B of the closed container 12 is deformed in a direction expanding outward. Thereby, the mounting hole 12
C also bulges outward and deforms in a direction to expand the mounting hole 12C as shown by a white arrow in FIG. 3, so that a welded portion between the terminal 20 and the end cap 12B (P in FIG. 3)
Is applied in the peeling direction.

Here, since the base portion 3 of the terminal 20 is formed thick as described above, it does not deform even if it receives a high pressure in the sealed container 12. Therefore, no inconvenience such as the electrical terminals 2. On the other hand, although a stress in the direction of peeling off the welded portion P is applied to the mounting portion 4 over the entire circumference, the mounting portion 4 can be deformed by the slit 6 in a direction spreading outward with respect to the base portion 3 as described above. Therefore, the mounting portion 4 can be deformed following deformation around the mounting hole 12C of the end cap 12B.

Accordingly, since the mounting portion 4 of the terminal 20 is deformed and the deformation of the end cap 12B of the closed container 12 can be absorbed over the entire circumference, the thickness of the base portion 3 is increased to improve the strength of the terminal 20. The terminal 20 and the sealed container 12
This prevents inconvenience in which the seal is broken between the mounting holes 12C of the end cap 12B, thereby preventing the occurrence of leakage (leakage) of the refrigerant gas therefrom.

In particular, since the attachment portion 4 can be deformed in the direction of expanding outward from the base portion 3 over the entire circumference of the terminal 20 by the slit 6, the end cap 12B of the sealed container 12 can be deformed with a simple structure. Can be absorbed by the mounting portion 4, so that the cost can be kept low. Also, due to the presence of the slit 6,
When fixing the mounting portion 4 to the end cap 12B of the sealed container 12, the heat of the projection welding is applied to the electric terminals 2.
And the glass seal 7 for attaching the electrical terminals 2... Can be prevented from being disadvantageously cracked.

Although the embodiment has been described using the two-cylinder two-stage compression type compressor 10 in which the rotary shaft 16 is installed vertically, it goes without saying that the present invention can be applied to a compressor in which the rotary shaft is installed horizontally. . In the embodiment, the two-stage compression type compressor having the first and second compression elements has been described. However, the present invention is not limited to this, and the multi-stage compression type having three, four, or more compression elements may be used. The present invention may be applied to a compressor having a single compression element.

Although the two-stage compression type compressor 10 is applied to the hot water supply device in the embodiment, the invention is not limited to this, and the present invention is also effective when used for heating a room. Further, in the embodiments, carbon dioxide is also used as the refrigerant, but the invention of claims 1 to 3 is not limited to this.

[0046]

As described above in detail, according to the present invention, in a hermetic electric compressor having an electric element in a closed container and a compression element driven by the electric element, the closed container has A terminal is provided, the terminal comprising: a circular base portion through which the electric terminal is mounted; and a mounting portion formed around the base portion and fixed by welding to a peripheral portion of a mounting hole of the closed container. Since the mounting portion is deformable over the entire circumference with respect to the base portion, a CO ₂ refrigerant is used as a refrigerant gas as in claim 4,
Even when the pressure inside the closed container becomes high and the closed container around the mounting hole attempts to deform, the mounting portion deforms following the deformation around the mounting hole of the closed container.

Therefore, even when the base portion of the terminal is made thicker than the mounting portion to increase the strength of the base portion and prevent the deformation of the base portion, the mounting portion is deformed to prevent deformation of the sealed container. It becomes possible to absorb over the entire circumference. This makes it possible to eliminate the disadvantage of gas leakage occurring between the terminal and the mounting hole of the sealed container over the entire periphery of the terminal while improving the strength of the terminal.

According to the second aspect of the present invention, in addition to the above, the mounting portion of the terminal extends in a direction from the periphery of the base to the inside of the closed container, and is provided between the mounting portion and the base. Since a slit cut from the inner surface of the closed container is formed over the entire periphery, the slit allows the mounting portion to expand outward from the base portion over the entire periphery of the terminal. Deformable.

Thus, the deformation of the closed container can be absorbed by the mounting portion with a simple configuration, and the cost increase can be kept low. In addition, the presence of the slit makes it difficult for the welding heat when the mounting portion is fixed to the closed container to be transmitted in the direction of the electric terminals, and causes a defect that a crack occurs in a glass seal or the like generally used for mounting the electric terminals. Inconvenience can be prevented.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a hermetic electric compressor according to the present invention.
FIG. 4 is a vertical sectional side view of a two-stage compression type compressor including a second compression element.

FIG. 2 is a top view of the two-stage compression type compressor of FIG.

FIG. 3 is an enlarged vertical sectional side view of a two-stage compression compressor of a terminal portion according to the present invention.

FIG. 4 is a vertical sectional side view of a terminal according to the present invention.

FIG. 5 is a top view of a terminal according to the present invention.

FIG. 6 is a bottom view of the terminal according to the present invention.

[Explanation of symbols]

 Reference Signs List 2 electric terminal 3 base part 4 mounting part 6 slit 7 glass seal 10 two-stage compression type compressor 12 hermetic container 12B end cap 12C mounting hole 14 electric element 16 rotary shaft 18 rotary compression mechanism part 20 terminal 32 first rotary compression element 34 second rotary compression element 36 intermediate partition plate 38 cylinder 40 cylinder

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Atsushi Oda 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Kazuya Sato 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Inventor Dai Matsuura 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term (reference) in Sanyo Electric Co., Ltd. 3H003 AA01 AB03 AC03 CD01 CF02 3H029 AA04 AA09 AA13 AB03 BB16 BB44 CC09 CC27

Claims (4)

[Claims] 1. A hermetic electric compressor comprising an electric element in a closed container and a compression element driven by the electric element, comprising: a terminal attached to the closed container; A circular base portion through which the electric terminal is mounted, and a mounting portion formed around the base portion and fixed by welding to a peripheral edge of a mounting hole of the closed container; A hermetic electric compressor characterized in that it can be deformed over its entire circumference. 2. The mounting portion of the terminal extends in a direction from the periphery of the base portion to the inside of the closed container, and a surface between the mounting portion and the base portion on the inside of the closed container. 2. The hermetic electric compressor according to claim 1, wherein a slit cut from the hole is formed over the entire circumference. 3. The terminal according to claim 1, wherein a base portion of the terminal is formed thicker than the mounting portion.
Or the hermetic electric compressor according to claim 2. Wherein said compression element is claimed in claim 1, by compressing the CO ₂ refrigerant gas, characterized in that discharging into the sealed vessel, the sealed type electric compressor according to claim 2 or claim 3.