JPH09195967A - Hermetic compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure reliability of a hermetic compressor using refrigerant taking HFC as a main component and using insoluble lubricating oil by sucking insoluble lubricating oil without sucking liquid refrigerant separated into two layers through an oil supplying pipe, and performing lubrication and the cooling action on the sliding surface in the compressor. SOLUTION: Liquid refrigerant is mostly outside a partition wall 16 by providing the cylindrical partition wall 16 having the height higher than the tip of an oil supplying pipe 9 on the tip of the oil supplying pipe and on the bottom surface inside a sealed casing 13 even if it is separated into two layers, insoluble lubricating oil 15 on the upper layer enters the partition wall 16 and sucked from the oil supplying pump 9, and therefore, liquid refrigerant on the lower layer is not sucked.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a refrigerator, a freezer,
The present invention relates to a hermetic compressor used in a showcase, a vending machine, etc.

[0002]

2. Description of the Related Art In recent years, chlorofluorocarbon (hereinafter referred to as C)
Environmental problems such as ozone layer depletion and global warming due to the effects of FC) and hydrochlorofluorocarbons (hereinafter referred to as HCFC) are drawing attention. From this point of view, various improvements have been made in order to substitute hydrofluorocarbon (hereinafter referred to as HFC) as a refrigerant to replace CFC and HCFC.

Specifically, HFC-13 which is an HFC refrigerant is used.
4a and R404A, R40 which are HFC mixed refrigerants
7C, R410A, etc. are mentioned as candidates. These H
FC-based refrigerants have characteristics that they have no chlorine at all and are inferior in solubility, they have hydrogen and have a large polarity, and they dissolve water well.
It is said that it is not compatible with the conventional mineral oil type refrigerating machine oil and is difficult to use. On the other hand, the synthetic oil alkylbenzene, which is compatible with the HFC-based refrigerant, has a high hygroscopicity and a poor electrical insulation because it contains a large amount of oxygen in the molecule. In addition, ester oils that are compatible with HFC-based refrigerants also have a problem of hydrolysis as compared with conventional mineral oils, and are said to be difficult to handle in terms of process control and market service.

Conventionally, a hermetic compressor has been disclosed in Japanese Patent Laid-Open No. 4-350.
As shown in the conventional example of Japanese Patent No. 386, a soluble lubricating oil that dissolves in the refrigerant is used. The differential pressure in the compressor,
Utilizing the rotation of the shaft and using springs, etc., the lubricating oil is sucked up from the oil supply pipe and conveyed to the sliding part of the machine part by the oil supply device, and the lubricating action of the sliding part and the cooling action of removing frictional heat are performed. To ensure the wear resistance of the compressor.

An example of a conventional hermetic compressor will be described below with reference to the drawings. FIG. 9 is a sectional view of a conventional hermetic compressor. Reference numeral 1 denotes a mechanical section, which is composed of a shaft 2, an auxiliary bearing 3, a bearing 4, a piston 5 and a cylinder 6. The shaft 2, the sub bearing 3, the bearing 4, the piston 5 and the cylinder 6 form a compression chamber 7. Reference numeral 8 denotes an oil supply device, which comprises an oil supply pipe 9 and a spring 10 located in the oil supply pipe and acting as a viscous pump. 11 is a mixed liquid of a refrigerant and refrigerating machine oil, and the oil supply device 8 is a mixed liquid 11
Is supplied to the sliding surface. 12 is a motor part. Reference numeral 13 is a metallic closed casing that houses the mechanical unit 1 and the motor unit 12.

The operation of the refrigerating system of the hermetic compressor constructed as described above will be described below. The shaft 2 is rotated by the rotation of the motor unit 12, moves the piston 5, and compresses the refrigerant in the compression chamber 7. The compressed refrigerant is liquefied in the condenser, dehydrated by the desiccant in the dryer, evaporated in the evaporator, cooled, and then returned to the compressor again.

[0007]

The ester-based refrigerating machine oil, which is compatible with the HFC-based refrigerant, is hydrolyzed by a small amount of water in the refrigerating machine oil to generate an acid, and the acid serves as a catalyst to further increase the amount of the acid. It will generate acid or harmful substances. The acid generated in this way acts on the sliding surface of the mechanical part and shortens the life of the compressor which has been corroded and abraded. Further, there is a problem that the polymer contained in the harmful substance is clogged in the piping of the refrigeration system to prevent the refrigerant from flowing back and cause a cooling failure. Therefore, compatible ester-based refrigerating machine oils are considered to be difficult to meet the market service from the viewpoint of water management.

On the other hand, in the case of the HFC-based refrigerant and the insoluble lubricating oil, two layers are separated in the compressor in the state of the liquid refrigerant in the lower layer and the insoluble lubricating oil in the upper layer, and refueling. When the tip of the pipe is in the lower layer liquid refrigerant, it sucks the liquid refrigerant instead of the lubricating oil, and not only does it not lubricate the sliding part, but it also has the effect of cleaning the lubricating oil, leading to abnormal wear. Have

In view of the above conventional problems, therefore, in the present invention, in a hermetic compressor of HFC-based refrigerant and non-dissolving lubricating oil, the upper layer of non-dissolving lubrication without sucking the liquid refrigerant from the oil supply pipe. It is an object of the present invention to provide a refrigeration system having a highly reliable compressor that sucks oil and reliably performs a sliding action on a sliding portion.

[0010]

In order to solve this problem, the present invention provides a closed casing in which a refrigerant containing HFC as a main component, a non-dissolving lubricating oil that is a refrigerating machine oil is enclosed, and the enclosed casing is housed in the closed casing. A mechanical part, a motor part for driving the mechanical part, an oil supply device for conveying refrigerating machine oil to the mechanical part, an oil supply pipe serving as an oil supply port of the oil supply device, and (at the tip of the oil supply pipe) On the bottom in the closed casing,
It is provided with a cylindrical partition wall which is located higher than the tip of the oil supply pipe.

As a result, the insoluble lubricating oil in the cylindrical partition wall is sucked. Further, a refrigerant mainly composed of HFC, a hermetic casing in which a non-dissolving lubricating oil which is a refrigerating machine oil is sealed, a machine part housed in the hermetic casing, a motor part for driving the machine part, and the machine part. An oil supply device for conveying refrigerating machine oil, an oil supply port of the oil supply device, which is located at an end of the hermetic casing, and a tip end portion of the oil supply pipe, so that an oil supply range of the oil supply pipe is narrowed. A partition plate is provided on the bottom surface in the closed casing and is located higher than the tip of the oil supply pipe.

Further, a refrigerant having HFC as a main component and a non-dissolving lubricating oil which is a refrigerating machine oil are enclosed, a mechanical section housed in the hermetic casing, a motor section for driving the mechanical section, By providing a refueling device that conveys refrigerating machine oil to the machine section, a refueling pipe that serves as a refueling port of the refueling device, and a refueling tank having a through hole on the upper surface at the tip of the refueling pipe, the liquid refrigerant in the lower layer Instead, the non-dissolved lubricating oil in the upper layer can be guided to the oil supply tank through the through hole and sucked through the oil supply pipe.

Furthermore, by providing a movable refueling tank having a through hole in the upper surface, which is made of a plastic float having a specific gravity that moves in conjunction with the liquid surface of the liquid refrigerant, the liquid refrigerant in the lower layer fluctuates. In addition, the movable refueling tank also moves in conjunction with this, and the non-dissolving lubricating oil can be reliably sucked from the refueling pipe.

Further, by providing an oil supply pipe having a slanted tip shape or an oil supply pipe having an uneven tip shape, even if the movable oil supply tank comes up with the liquid refrigerant, the tip of the oil supply pipe has the lower surface of the movable oil supply tank. It will not block and will be able to reliably refuel.

Further, by using the oil supply pipe provided with the stopper for restricting the movable range of the movable oil supply tank, even if the movable oil supply tank comes up with the liquid refrigerant, the tip of the oil supply pipe is blocked by the lower surface of the movable oil supply tank. Can be surely refueled.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention includes a closed casing in which a refrigerant containing HFC as a main component and a non-dissolved lubricating oil that is a refrigerating machine oil are enclosed, and the closed casing is housed in the closed casing. A mechanical part, a motor part for driving the mechanical part, an oil supply device for conveying refrigerating machine oil to the mechanical part, an oil supply pipe serving as an oil supply port of the oil supply device, and the sealing (at the tip of the oil supply pipe) The bottom of the casing is a hermetic compressor with a cylindrical partition wall that is higher than the tip of the oil supply pipe, and even if the liquid refrigerant and the insoluble lubricating oil are separated into two layers, the liquid in the lower layer is The upper layer of insoluble lubricating oil enters the cylindrical partition wall without sucking the refrigerant from the oil supply pipe, so the insoluble lubricating oil should be sucked in and the sliding part lubricated reliably. It has the effect that

According to the second aspect of the present invention, even when the refrigerant containing HFC as a main component and the insoluble lubricating oil are separated,
Due to the partition plate, the oil supply range at the tip of the oil supply pipe is narrow,
Since the amount of liquid refrigerant is small, the lower layer liquid refrigerant outside the partition plate is not sucked, but the upper layer non-dissolved lubricating oil is sucked from the oil supply pipe to perform lubrication and cooling of the sliding surface. Therefore, the reliability of the compressor and the refrigeration system using the insoluble lubricating oil can be secured.

According to a third aspect of the present invention, a hermetically sealed casing enclosing a refrigerant containing HFC as a main component and a non-dissolving lubricating oil that is a refrigerating machine oil, a mechanical part housed in the hermetically sealed casing, and the mechanical part. A motor part for driving the oil supply device, an oil supply device for conveying refrigerating machine oil to the mechanical part, an oil supply pipe serving as an oil supply port of the oil supply device, and a movable oil supply tank having a through hole at the top end of the oil supply pipe. It is a closed type compressor,
Even if the liquid refrigerant and the insoluble lubricating oil are separated into two layers, the upper layer of the insoluble lubricating oil enters the movable refueling tank through the through hole on the upper surface without sucking the lower layer liquid refrigerant from the oil supply pipe. Therefore, it can be inhaled from the oil supply pipe.

The invention according to claim 4 is a hermetically-sealed compression machine comprising a float made of plastic having a specific gravity that moves in conjunction with the liquid surface of the liquid refrigerant, and having a movable refueling tank having a through hole in the upper surface. Even if the liquid refrigerant and non-dissolved lubricating oil are separated into two layers and the separation surface (liquid surface of the liquid refrigerant) fluctuates, the movable refueling tank also moves (the lower layer liquid refrigerant is refueled). Can move without sucking from pipe) Non-dissolving lubricating oil in refueling tank can be sucked from refueling pipe.

The invention according to a fifth aspect is the hermetic compressor according to the third aspect, which is provided with an oil supply pipe whose tip shape is oblique.
Even if the movable refueling tank rises together with the liquid refrigerant due to the separation of two layers (a part of the tip of the refueling pipe hits the movable refueling tank), the front face of the refueling pipe will not be blocked by the lower surface of the movable refueling tank. As a result, the insoluble lubricating oil can be surely sucked from the oil supply pipe.

According to a sixth aspect of the present invention, there is provided the hermetic compressor according to the third aspect, which is provided with an oil supply pipe having an uneven tip.
Even if the liquid refrigerant is separated into two layers and the movable refueling tank rises together with the liquid refrigerant, the convex part at the tip of the refueling pipe hits the lower surface of the movable refueling tank, and the non-dissolving lubricating oil is released from the recess at the end of the refueling pipe. Can be inhaled from the oil supply pipe.

The invention according to claim 7 is the hermetic compressor according to claim 3, further comprising an oil supply pipe having a stopper for restricting the movable range of the movable oil supply tank, wherein the liquid refrigerant and the insoluble lubricating oil are included. Even if the movable refueling tank rises together with the liquid refrigerant due to the two layers, the movable refueling tank stops at the stopper of the refueling pipe, so the tip of the refueling pipe is not blocked by the lower surface of the movable refueling tank and the refueling pipe More always insoluble lubricant can be inhaled.

A portable device according to the present invention will be described below with reference to FIGS. 1 to 7. The same components as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

(Embodiment 1) FIGS. 1 and 2 are a sectional view and a partial sectional view of a hermetic compressor according to a mobile phone 1 embodying the present invention.

In FIGS. 1 and 2, 14 is a refrigerant containing HFC as a main component, 15 is an insoluble lubricating oil, and the refrigerant 14 containing HFC as a main component and the insoluble lubricating oil 15 are contained in the closed casing 13. Represents a separated state. Reference numeral 16 denotes a tip end portion of the oil supply pipe 9, which is a cylindrical partition wall which is located on the bottom surface in the closed casing 13 and is located higher than the tip of the oil supply pipe 9.

In FIGS. 1 and 2, reference numeral 16 designates a cylindrical partition wall. However, when the oil supply pipe 9 is located toward the end of the closed casing 13, as shown in FIG. 16 'may be formed to surround the tip of the oil supply pipe 9 in a narrow range.

Although FIG. 1 shows a rotary compressor, it can also be applied to a reciprocating compressor and a scroll compressor.

The operation of the hermetic compressor constructed as described above will be described below. When the hermetic compressor is operated, the shaft 2 is rotated by the rotation of the motor unit 12, and the oil supply device 8 causes the differential pressure of the oil supply pipe 9 and the spring 10 to rotate.
The oil is supplied by the rotation of the
Are transported and perform lubrication and cooling of the sliding surface. In the initial stage of the operation of the hermetic compressor, the refrigerant 14 composed mainly of HFC and the insoluble lubricating oil 15 are separated into two layers, and the refrigerant 14 composed mainly of HFC having a specific gravity of about 1.1 is formed in the lower layer. The non-dissolving lubricating oil 15 having a specific gravity of about 0.9 is the upper layer. Since the tubular partition wall 16 is provided, even if the HFC-based refrigerant 14 is separated into the lower layer as a liquid refrigerant, most of it is outside the tubular partition wall 16 and the tubular partition wall 16
The non-dissolved lubricating oil 15 in the upper layer will enter the inside. Therefore, it is the non-soluble lubricating oil 15 that is started and sucked from the oil supply pipe 9. Even when a small amount of the HFC-based refrigerant 14 is present in the cylindrical partition wall 16 in the liquid refrigerant state, the liquid refrigerant is sucked for only a very short time, and thereafter, the upper layer of the insoluble lubricating oil is used. 15 will be inhaled.

As described above, since the hermetic compressor of the present embodiment is provided with the cylindrical partition wall 16 at the position of the tip of the oil supply pipe 9, the refrigerant 14 mainly composed of HFC and the insoluble lubricating oil 15 are provided.
Even in the separated state, the non-soluble lubricating oil 15 can be sucked in and the sliding surface can be lubricated and cooled.

(Second Embodiment) Next, a hermetic compressor according to a second embodiment of the present invention will be described with reference to the drawings. Regarding the same configuration as the first embodiment,
The same reference numerals are given and the detailed description is omitted.

FIG. 4 is a partial sectional view of a hermetic compressor according to the second embodiment of the present invention. In FIG. 4, 17 is
It is an oil supply tank provided at the tip of the oil supply pipe 9, and a through hole 18 is provided in the upper surface of the oil supply tank 17.

With the above structure, the HFC-based refrigerant 14
Even if is separated into the lower layer as a liquid refrigerant, the upper layer non-dissolving lubricating oil 15 enters the oil supply tank 17 through the through hole 18 on the upper surface. In addition, H in the refueling tank 17
Even when a small amount of the FC-based refrigerant 14 exists in the liquid refrigerant state, the liquid refrigerant is sucked for only a very short time, and the non-soluble lubricating oil 15 is sucked thereafter.

(Third Embodiment) FIG. 5 is a partial sectional view of a hermetic compressor according to a third embodiment of the present invention.

In FIG. 5, reference numeral 19 denotes a movable refueling tank made of a plastic float having a specific gravity that moves in conjunction with the liquid surface of the liquid refrigerant at the tip of the refueling pipe 9A. On the upper surface of the refueling tank 19 made of the float,
A through hole 18 is provided. A protrusion 20 is attached to the tip of the oil supply pipe 9A so that the movable oil supply tank 19 does not come off. The movable refueling tank 19 is HF
The specific gravity of the C-based refrigerant 14 is about 1.1, and the insoluble lubricating oil 1
Since the specific gravity of 5 is about 0.9, the through hole 18 is slightly above the liquid surface of the liquid refrigerant by taking advantage of the difference in specific gravity.

With the above structure, the HFC-based refrigerant 14
However, even when the liquid refrigerant is separated into the lower layer and is present in a large amount, the movable refueling tank 19 rises together with the liquid surface of the liquid refrigerant, and the non-dissolved lubricating oil 15 in the upper layer is discharged from the through hole 18.
Comes into the movable refueling tank 19. Further, when the liquid refrigerant is small or runs out, the movable refueling tank 19 is lowered and stopped at the protrusion 20 at the tip of the refueling pipe 9A, and the non-dissolving lubricating oil 15 in the upper layer enters through the through hole 18. In this way, even when the HFC-based refrigerant 14 and the insoluble lubricating oil 15 are separated and the boundary surface changes, the insoluble lubricating oil 15 is sucked in from the oil supply pipe 9A,
The sliding surface can be lubricated and cooled.

(Fourth Embodiment) FIG. 6 is a partial sectional view of a hermetic compressor according to a fourth embodiment of the present invention.

In FIG. 6, 9B is an oil supply pipe having a slanted tip. By providing the oil supply pipe 9B having an oblique tip shape, the refrigerant 14 mainly composed of HFC is separated into the lower layer as the liquid refrigerant and is present in a large amount, and the movable oil supply tank 19 rises together with the liquid surface of the liquid refrigerant. Also, the bottom surface of the movable refueling tank 19 hits the tip of the refueling pipe 9B having a slanted tip shape, and the refueling port is not completely blocked, so that the upper layer insoluble lubricating oil 15 is reliably sucked in to lubricate the sliding surface. A cooling action can be performed.

(Fifth Embodiment) FIG. 7 is a partial sectional view of a hermetic compressor according to a fifth embodiment of the present invention.

In FIG. 7, reference numeral 9C designates an oil supply pipe having an uneven tip. By providing the oil supply pipe 9C having an irregular tip shape, the refrigerant 14 mainly composed of HFC is separated as a liquid refrigerant into the lower layer and is present in a large amount, and even when the movable oil supply tank 19 rises together with the liquid surface of the liquid refrigerant. The bottom surface of the movable oil supply tank 19 corresponds to the convex portion of the oil supply pipe 9C having a concave and convex shape, and the non-dissolved lubricating oil 15 in the upper layer can be reliably sucked in from the concave portion to perform the lubrication and cooling action on the sliding surface. You can

(Sixth Embodiment) FIG. 8 is a partial sectional view of a hermetic compressor according to a sixth embodiment of the present invention.

In FIG. 8, 21 is a movable refueling tank 19.
Is a stopper for restricting the movable range of the above, and is a link-shaped stopper pressed against the oil supply pipe 9D. By providing the stopper 21 on the oil supply pipe 9D, even when the refrigerant 14 mainly composed of HFC is separated as a liquid refrigerant into the lower layer and exists in a large amount, and the movable oil supply tank 19 rises along with the liquid surface of the liquid refrigerant, the stopper is provided. In 21, the non-dissolved lubricating oil 15 in the upper layer can be reliably sucked in without blocking the oil supply port at the tip of the oil supply pipe 9D, and the sliding surface can be lubricated and cooled.

[0042]

As described above, according to the present invention, a closed casing in which a refrigerant containing HFC as a main component, a non-dissolved lubricating oil that is a refrigerating machine oil is enclosed, and a mechanical section housed in the closed casing, A motor unit that drives the machine unit, an oil supply device that conveys refrigerating machine oil to the machine unit, an oil supply pipe that serves as an oil supply port of the oil supply device, and a tip portion of the oil supply pipe on the bottom surface in the closed casing. Even if the HFC-based refrigerant and the insoluble lubricating oil are separated, the upper layer (without sucking the liquid refrigerant in the lower layer) is provided by providing the cylindrical partition wall that is located higher than the tip of the oil supply pipe. The non-dissolved lubricating oil can be sucked from the oil supply pipe to lubricate and cool the sliding surface, and the reliability of the compressor and the refrigeration system using the non-dissolved lubricating oil can be secured.

Further, a closed casing in which a refrigerant containing HFC as a main component, a non-dissolving lubricating oil as a refrigerating machine oil is sealed, a machine part housed in the closed casing, and a motor part for driving the machine part, An oil supply device that conveys refrigerating machine oil to the machine part, an oil supply pipe that is an oil supply port of the oil supply device and is located at an end of the closed casing, and a tip end portion of the oil supply pipe has a narrow oil supply range. By providing a partition plate which is provided on the bottom surface in the closed casing and is located higher than the tip of the oil supply pipe,
Even when the refrigerant containing C as a main component and the insoluble lubricating oil are separated, the partition plate narrows the oil supply range at the tip of the oil supply pipe, so the amount of liquid refrigerant is small and the lower layer outside the partition plate A compressor and a refrigeration system using non-dissolving lubricating oil, which can suck the upper layer of non-dissolving lubricating oil from the oil supply pipe to lubricate and cool the sliding surface without sucking the liquid refrigerant. The reliability of can be secured. In addition, the structure is simple, and there are advantages in terms of productivity and cost of the compressor.

Further, a refrigerant having HFC as a main component, a non-dissolving lubricating oil which is a refrigerating machine oil, a hermetically sealed casing, a mechanical part housed in the hermetically sealed casing, a motor part for driving the mechanical part, By providing the refueling device that conveys refrigerating machine oil to the machine part, the refueling pipe that serves as a refueling port of the refueling device, and the refueling tank having a through hole on the upper surface at the tip of the refueling pipe, the HFC-based refrigerant Even if is separated into the lower layer as a liquid refrigerant, the upper layer of non-dissolved lubricating oil enters the oil supply tank and is sucked from the oil supply pipe to allow lubrication and cooling of the sliding surface. The reliability of the compressor and refrigeration system using oil can be ensured.

Further, by providing a movable refueling tank having a through hole on the upper surface, which is made of a plastic float having a specific gravity that moves in conjunction with the liquid surface of the liquid refrigerant,
Even when a large amount of HFC-based refrigerant separates as a liquid refrigerant into the lower layer, the movable refueling tank rises along with the liquid refrigerant surface, and the upper non-dissolving lubricating oil enters the movable refueling tank through the through hole. As it comes in, the fill pipe draws in insoluble lubricating oil. On the other hand, when the liquid refrigerant is in a small amount or runs out, the movable refueling tank is also lowered and sucks the insoluble lubricating oil. Therefore, even if the amount of the liquid refrigerant changes, the insoluble lubricating oil can be reliably sucked from the oil supply pipe, the sliding surface can be lubricated and the cooling action can be performed, and the compressor using the insoluble lubricating oil can be used. Also, the reliability of the refrigeration system can be secured.

Further, by providing the oil supply pipe having the slanted tip shape, the refrigerant containing HFC as a main component is separated as the liquid refrigerant into the lower layer and a large amount thereof is present, and the movable oil supply tank rises together with the liquid surface of the liquid refrigerant. Also, the bottom of the movable refueling tank hits the end of the refueling pipe with a slanted tip shape, and the refueling port is not completely blocked, so the upper layer of insoluble lubricating oil can be reliably sucked in, and the sliding surface is lubricated and cooled. Therefore, the reliability of the compressor and the refrigeration system using the insoluble lubricating oil can be ensured.

Alternatively, by providing the oil supply pipe having the irregular shape at the tip, the refrigerant mainly composed of HFC is separated into the lower layer as the liquid refrigerant and a large amount thereof is present, and the movable oil supply tank rises together with the liquid surface of the liquid refrigerant. Even in such a case, the tip of the bottom surface of the movable refueling tank hits the convex portion of the irregular oil supply pipe, and the insoluble lubricating oil in the upper layer can be reliably sucked in from the concave portion, and the sliding surface can be lubricated and cooled. Therefore, the reliability of the compressor and the refrigeration system using the insoluble lubricating oil can be secured.

Further, by providing a stopper for restricting the movable range of the movable refueling tank in the refueling pipe, the refrigerant of the HFC main component is separated into the lower layer as a liquid refrigerant and a large amount thereof is present, and the movable refueling tank has a liquid refrigerant. Even if it goes up with the liquid surface of the above, the upper surface of the movable refueling tank does not stop with the stopper and the refueling port is not completely blocked, and the non-dissolved lubricating oil in the upper layer can be reliably sucked in, and the sliding surface lubrication and cooling action Therefore, the reliability of the compressor and the refrigeration system using the insoluble lubricating oil can be ensured.

[Brief description of the drawings]

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

FIG. 2 is a partial cross-sectional view of the hermetic compressor of the same embodiment.

FIG. 3 is a partial cross-sectional view of a hermetic compressor showing another aspect of the partition wall in the same embodiment.

FIG. 4 is a partial cross-sectional view of Embodiment 2 of the hermetic compressor according to the present invention.

FIG. 5 is a partial cross-sectional view of Embodiment 3 of the hermetically sealed Takata compressor according to the present invention.

FIG. 6 is a partial sectional view of a hermetic compressor according to a fourth embodiment of the present invention.

FIG. 7 is a partial cross-sectional view of Embodiment 5 of the hermetic compressor according to the present invention.

FIG. 8 is a partial sectional view of a hermetic compressor according to a sixth embodiment of the present invention.

FIG. 9 is a sectional view of a conventional hermetic compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine part 8 Oil supply device 9,9A, 9B, 9C, 9D Oil supply pipe 12 Motor part 13 Closed casing 14 HFC main component refrigerant 15 Non-dissolving lubricating oil 16 Cylindrical partition wall 16 'Partition plate 17 Oil tank 18 penetration Hole 19 Movable refueling tank 21 Stopper

Claims (7)

[Claims] 1. A hermetic casing in which a refrigerant containing HFC as a main component and a non-dissolving lubricating oil that is a refrigerating machine oil are sealed, a mechanical section housed in the hermetic casing, and a motor section for driving the mechanical section. An oil supply device that conveys refrigerating machine oil to the machine part, an oil supply pipe that serves as an oil supply port of the oil supply device, and a cylinder at a tip of the oil supply pipe on a bottom surface of the closed casing up to a position higher than the tip of the oil supply pipe. Hermetic compressor with a circular partition wall. 2. A hermetic casing in which a refrigerant containing HFC as a main component and a non-dissolving lubricating oil that is a refrigerating machine oil are sealed, a mechanical section housed in the hermetic casing, and a motor section for driving the mechanical section. An oil supply device that conveys refrigerating machine oil to the machine part, an oil supply pipe that is an oil supply port of the oil supply device and is located at an end of the closed casing, and a tip end portion of the oil supply pipe has a narrow oil supply range. A hermetic compressor provided with a partition plate which is provided on the bottom surface in the hermetic casing so as to be higher than the tip of the oil supply pipe. 3. A hermetically sealed casing in which a refrigerant containing HFC as a main component and a non-dissolving lubricating oil that is a refrigerating machine oil are sealed, a mechanical section housed in the hermetically sealed casing, and a motor section for driving the mechanical section. A hermetic compressor that includes an oil supply device that conveys refrigerating machine oil to the machine section, an oil supply pipe that serves as an oil supply port of the oil supply device, and an oil supply tank that has a through hole at the top surface of the oil supply pipe. 4. The hermetic compressor according to claim 2, wherein a movable refueling tank having a through hole on the upper surface is provided, which is made of a plastic float having a specific gravity that moves in conjunction with the liquid surface of the liquid refrigerant. 5. The hermetic compressor according to claim 3, further comprising an oil supply pipe having a beveled tip. 6. The hermetic compressor according to claim 3, further comprising an oil supply pipe having an uneven tip. 7. The hermetic compressor according to claim 3, which is an oil supply pipe provided with a stopper for restricting a movable range of the oil supply tank.