JP3104513B2 - accumulator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accumulator used for an air conditioner or a refrigerator .

[0002]

Refrigeration cycle of the Prior Art In general, as shown in FIG. 8,
The compressor (14), the condenser (15), the pressure reducer (16), the evaporator (17), and the accumulator (18) are connected in a ring shape by piping. For example the well-known accumulator described Japanese Patent Publication No. 57-17187 and in JP-B-62-52230 (18), as shown in FIG. 7, the cylindrical closed vessel
The suction pipe (2) is attached to the middle part of (1), and the discharge pipe (7) is attached to the bottom part. The discharge pipe (7) has one opening projecting into the cylindrical closed container (1), and the cylindrical closed container (1)
A small hole (8) is provided in the vicinity of the hole.

Conventional accumulator, which is configured as described above, the liquid mixture of lubricants and refrigerant liquid collected in the bottom of the cylindrical closed container (1), the discharge pipe from the small holes (8)
It is sucked into (7) and sent to the compressor (14).

[0004] Generally, in a refrigeration cycle apparatus,
The accumulator is provided in front of the compressor suction side, separates the gas-liquid refrigerant into gas and liquid, prevents the compressor from inhaling the liquid refrigerant, and accumulates the lubricating oil of the compressor flowing together with the refrigerant. It is required to return to the compressor smoothly without staying in the inside. Figure of conventional refrigeration cycle
As shown in FIG. 9 , a compressor (51), a condenser (52), a decompression device (5
3), the evaporator (54) and the accumulator (55) are connected in order by a refrigerant pipe.
Accumulator (55) was published in JP, as shown in FIG. 10, includes a refrigerant suction pipe (56) and the refrigerant discharge pipe (57),
An oil return pipe (58) is provided in the refrigerant discharge pipe (57), and a heating device (60) for heating the liquid refrigerant and a detection device (63) for detecting the liquid level are provided in the accumulator (55). Configuration.

In such a conventional refrigeration cycle apparatus, when a wet refrigerant flows in from a suction pipe (56),
The liquid refrigerant accumulates at the bottom of the accumulator (55), and the discharge pipe
From (57), only the gas refrigerant flows out. accumulator
Lubricating oil also accumulates at the bottom of (55), dissolves with the liquid refrigerant, and a mixed fluid of the lubricating oil and liquid refrigerant is sucked from the oil return pipe (58) into the discharge pipe (57) to lubricate the sliding parts of the compressor. It is carried out.
Then, when the liquid level in the accumulator (55) rises above a certain value, this is detected by the level detector (63),
The liquid refrigerant is heated by the heating device (60), becomes a gas refrigerant, and is sucked into the compressor through the discharge pipe (57).

Another conventional refrigeration cycle is as follows:
As shown in FIG. 11 , a compressor (71), a four-way valve (72), an indoor heat exchanger (73), a check valve (74a) (74b), a receiver (75), a pressure reducing device (76a) (76b) , Outdoor heat exchanger (77), accumulator (78)
Are sequentially and functionally connected by a refrigerant pipe.

[0007] In such a conventional refrigeration cycle apparatus, lubricating oil required for normal operation of the compressor (71) is supplied from an accumulator (78). The lubricating oil is present in the accumulator (78) in a state of being dissolved with the refrigerant, accumulates as a mixed fluid with the liquid refrigerant at the bottom of the accumulator, returns to the refrigerating cycle through an oil return hole provided in the discharge pipe of the accumulator, and is sent to the compressor. The lubrication of the sliding part of the compressor is performed.

[0008]

A conventional accumulator as shown in FIG. 9 is provided in front of a suction side of a compressor to prevent refrigerant liquid from flowing into the compressor.
It is required that the lubricating oil flows smoothly, but if a lubricating oil having a specific gravity smaller than the refrigerant liquid is used, the moist refrigerant gas will flow through the suction pipe (2) into the cylindrical closed vessel (1). The liquid mixture collected at the bottom of the cylindrical closed container (1) when it flows into the small closed hole (8) is divided into lubricating oil at the top and refrigerant liquid at the bottom.
, The lubricating oil cannot return to the compressor, and the compressor may be damaged due to wear or the like.

Further, an accumulator as shown in FIG. 10 that constitutes the conventional refrigeration cycle apparatus as shown in FIG. 9 (5
In (5), the mixed liquid of the liquid refrigerant and the lubricating oil accumulated at the bottom of the accumulator (55) has a layer rich in lubricating oil in the upper layer and a layer rich in liquid refrigerant in the lower layer due to the specific gravity of the two. Depending on the vertical position of the oil return pipe (58), only liquid refrigerant is sucked from the oil return pipe (58), and lubricating oil may not return to the compressor and wear may cause damage to the compressor due to wear. there were.
In the above description, the accumulator (55) is based on the assumption that the refrigerant and the lubricating oil are mutually soluble.If the refrigerant does not dissolve in the lubricating oil at all, the refrigerant and the lubricating oil are completely separated in the accumulator (55). As a result, the lubricating oil accumulates in the upper layer of the liquid refrigerant due to the specific gravity of the two, and the lubricating oil does not return to the compressor unless the lubricating oil is at the position of the oil return pipe (58). Lubricating oil could accumulate in (), causing damage to the compressor.

Also, in the accumulator constituting the conventional refrigeration cycle apparatus as shown in FIG. 11 , the lubricating oil does not return to the compressor in the same manner as described above, and the compressor may be damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. Even when lubricating oil and a refrigerant are compatible with each other or when the lubricating oil does not dissolve at all, the lubricating oil is stored in the accumulator. Provided are an accumulator and a refrigeration cycle device that ensure refrigerant reliability and prevent compressor damage by preventing refrigerant gas and lubricating oil from being efficiently sucked into a compressor without stagnation and preventing lubrication failure. The purpose is to do so.

[0012]

An accumulator according to the invention of claim 1 Means for Solving the Problems] is connected to the suction pipe to the discharge pipe into the cylindrical closed vessel, the gasified refrigerant from the upper Symbol discharge pipe in the cylindrical closed vessel In the accumulator, which is made to suck the separated lubricating oil into the compressor while being sucked into the compressor,
A first partitioning means having a suction pipe opened above the cylindrical closed container, a discharge pipe having an opening disposed below the opening of the suction pipe, and a communication hole provided between the suction pipe and the suction pipe. A second partitioning means provided below the opening of the discharge pipe and having a rising surrounding wall so as to be able to store liquid from the suction pipe, and one end connected to the second partitioning means and the other end being A U-shaped pipe opened below the upper end of the rising surrounding wall and in a space communicating below the second partition means, and the U-shaped pipe is provided at the same level as an opening at the other end of the U-shaped pipe. Oil return means for returning oil from the liquid stored in the one partition means to the compressor is a main configuration.

An accumulator according to a second aspect of the present invention comprises:
A suction pipe and a discharge pipe are connected to the cylindrical airtight container, and the refrigerant gasified in the cylindrical airtight container is sucked into the compressor from the discharge pipe, and the separated lubricating oil is sucked into the compressor. In the accumulator, a suction pipe opened above the cylindrical closed container, a discharge pipe having an opening disposed below the opening of the suction pipe, and a communication hole provided between the suction pipe and the discharge pipe having a communication hole. Partition means, and a second partition means provided below the opening of the discharge pipe and having a rising surrounding wall so as to be able to store liquid from the suction pipe,
Provided between the second partitioning means and the bottom of the cylindrical closed container;
A third partitioning means capable of storing the liquid, and the third partition
Communicating the step with the second partitioning means and the third
One end is connected to the partition means and the other end is
Comprising a pipe having an opening below the upper end of an oil return means returning the oil from the reservoir with liquid at the other end of the opening and the first partitioning means provided on the same level of the upper Sharing, ABS pipe to the compressor, the That is the main configuration.

An accumulator according to a third aspect of the present invention comprises:
In addition to the structure of claim 1 or 2 , a conical fourth partition plate is provided at the upper, lower or upper and lower portions of the first partition plate.

An accumulator according to a fourth aspect of the present invention comprises:
In addition to the configuration of claim 1, 2, or 3 , a wire mesh screen is provided above the first partition means or between the first partition means and the second partition means.

An accumulator according to a fifth aspect of the present invention comprises:
In addition to the configuration according to any one of claims 1 to 4 , a second discharge pipe that opens upward in the cylindrical closed container is provided.

[0017]

[Action] accumulator according to a first aspect of the invention, refrigerant
The liquid accumulates in the upper part of the second partition means, and accumulates in the cylindrical closed container via the U-shaped pipe. Since the liquid level of the refrigerant is equal to the level of the lubricating oil return means, the lubricating oil having a small specific gravity is efficiently sent to the compressor to ensure the reliability of the compressor.

An accumulator according to a second aspect of the present invention comprises:
Refrigerant liquid accumulated at the bottom of the cylindrical closed vessel via the communicating pipe overflows from the straight pipe and keeps the liquid level constant, so that the liquid level of the refrigerant is equal to the level of the lubricating oil return means, so lubricating oil with a small specific gravity can be used efficiently. It is sent to the compressor well to prevent damage to the compressor.

[0019] In the accumulator according to the third aspect of the present invention, the refrigerant sucked by the conical fourth partition plate does not directly flow into the liquid level on the second partition means, so that the liquid level is prevented from being disturbed and the liquid level is kept constant. Therefore, the lubricating oil is efficiently separated and can be selectively returned to the compressor, thereby preventing damage to the compressor.

An accumulator according to a fourth aspect of the present invention comprises:
Refrigerant gas that has flowed into the cylindrical closed container will have a low viscous refrigerant liquid flow first through the wire mesh screen,
The lubricating oil and the refrigerant liquid are separated, and the lubricating oil is efficiently separated and selectively returned to the compressor.

An accumulator according to a fifth aspect of the present invention comprises:
Since the refrigerant gas flowing into the cylindrical airtight container is also sent from the second discharge pipe to the compressor, the amount of refrigerant passing through the first partitioning means is reduced, and disturbance of the liquid level is prevented. Are efficiently separated.

[0022]

[Embodiment 1] An embodiment of the present invention will be described below with reference to the drawings. FIG.
Is a longitudinal sectional view, and FIG. 2 is a plan sectional view. In the figure, (1)
Is a cylindrical airtight container that penetrates its upper wall (1a)
(1) A suction pipe (2) opened upward inside is attached, and a lubricating oil return pipe (5) opened on the side wall of the cylindrical airtight container (1). A first partition plate (first partition plate) having a plurality of holes between a suction pipe (2) and a lubricating oil return pipe (5) serving as an oil return means is provided in a cylindrical closed container (1). 3) as a second donut-shaped partitioning means having a cylindrical rising enclosure (4a) at the center of the cylindrical closed vessel (1) located below the lubricating oil return pipe (5). A second partition plate (4), one end of which is open at the height of the lubricating oil return pipe (5) in the rising wall (4a) and the other end of the plurality of U-shaped pipes is the second partition plate.
Connect to (4). Further, a discharge pipe (7) which rises through the bottom wall (1b) of the cylindrical airtight container (1) is formed between the lubricating oil return pipe and the first partition plate (3), and the upper end thereof is the first partition. Opening facing the partition plate. The discharge pipe (7) has a small hole (8) opened near the bottom wall (1b) of the cylindrical airtight container (1). This small hole
According to (8), when starting while the liquid is stored in the cylindrical airtight container (1) as the accumulator, the circulation amount of the refrigerant is insufficient just by evaporating and returning the refrigerant, so that the reliability of the compressor is reduced. The liquid within the range that can be kept can be returned. In addition, the first
The plurality of holes provided in the partition plate (3) are, as shown in FIG.
It is located outside the rising surrounding wall (4a) and its size should be larger than the hole of the suction pipe (2) in order to reduce the flow rate of the refrigerant flowing down on the second partition plate (4). Is preferred.

Next, the operation will be described. When the refrigerant humid from the suction pipe (2) flows into the cylindrical closed vessel (1), the refrigerant gas passes through the first partition plate (3) and is sent to the compressor via the discharge pipe (7). Further, the refrigerant liquid and the lubricating oil accumulate between the rising wall (4a) of the second partition plate (4) and the side wall (1c) of the cylindrical closed vessel (1), and the U-shaped pipe (6) It flows in from the end (6a), overflows from the higher end (6b), and accumulates at the bottom of the cylindrical airtight container (1). At this time, since the height of the high end (6b) of the U-shaped pipe (6) is almost equal to the height of the lubricating oil return pipe (5), the liquid level of the refrigerant is always constant, and the lubricating oil return It matches the mounting position of the pipe (5). Refrigerant liquid and lubricating oil are second
In the case of lubricating oil having a lower specific gravity than the refrigerant liquid, while the lubricating oil has a lower specific gravity than the refrigerant liquid, the lubricating oil accumulates on the refrigerant liquid. It can be sent to the compressor, ensuring compressor reliability and preventing compressor damage.

In the above embodiment, the refrigerant liquid overflowing from the U-shaped pipe (6) falls to the bottom of the cylindrical airtight container (1). However, by making the cylindrical airtight container vertical and sufficiently taking up space. Even if the amount of the refrigerant liquid fluctuates, it is sufficiently controlled. Further, the liquid overflowing from the U-shaped pipe is isolated from the liquid on the second partition plate by the rising surrounding wall (4a), so that the liquid level does not disturb.

Embodiment 2 FIG. Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. 3, the same or corresponding parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will not be repeated. A third partition plate (9) as third partition means is provided between the second partition plate (4) and the bottom wall (1b) of the cylindrical closed container (1), and this third partition plate is provided. (9) and the second partition plate (4) are connected by a plurality of communication pipes (10). Further, the other end of the straight pipe (11) having one end opened at the level of the lubricating oil return pipe in the rising surrounding wall (4a) is connected to the third partition plate (9). Second divider plate (4) and third divider plate (9)
And a discharge pipe (7) that penetrates the cylindrical closed container side (1c) and opens to face the first partition plate (3). The discharge pipe (7) is provided with a small hole (8) that opens near the side wall (1c) of the cylindrical closed container (1). This small hole (8) is
In order to avoid the effect of dynamic pressure due to bending R in (7), side wall (1c)
It is provided on the lateral side of the vicinity.

Next, the operation will be described. In the above configuration,
When the refrigerant humid from the suction pipe (2) flows into the closed cylindrical container (1), the refrigerant gas passes through the first partition plate (3) and is discharged to the discharge pipe.
It is sent to the compressor via (7). The refrigerant liquid and lubricating oil are
The refrigerant liquid accumulated at the upper part of the second partition plate (4) and between the bottom wall (1b) of the cylindrical closed container and the third partition plate (9) via the communication pipe (10), The straight pipe (11) is raised, overflows the upper end (11a) of the straight pipe (11), and accumulates on the upper part of the third partition plate (9), so that even if the amount of the refrigerant increases or decreases, it is controlled.
Since the liquid level of the refrigerant liquid accumulated between the surrounding wall (4a) of the second partition plate (4) and the cylindrical closed vessel (1) is at a level substantially equal to the upper end (11a) of the straight pipe (11), Constant lubrication oil return pipe
It matches the mounting position of (5). Therefore, the lubricating oil having a lower specific gravity than the refrigerant liquid accumulates on the cooling liquid, so that it can be efficiently sent to the compressor from the lubricating oil return pipe (5), ensuring the reliability of the compressor and preventing damage to the compressor. To prevent. In addition, since there is a large storage space between the bottom wall (1b) and the third partition plate (9), no problem is caused even when the amount of liquid returned is large.

Embodiment 3 FIG. Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. FIG.
In FIG. 1, the same or corresponding parts as those in FIG. FIG. 4 shows a first embodiment in which a conical fourth partition plate (12) is provided below the first partition plate (3). In the above embodiment, when the refrigerant humid from the suction pipe (2) flows into the cylindrical closed container (1), the first
The refrigerant gas passes through the partition plate (3) and is sent to the compressor via the discharge pipe (7). The refrigerant liquid and the lubricating oil are supplied to the second partition plate.
While the oil is stored in the upper portion of (4), lubricating oil having a specific gravity lower than that of the refrigerant liquid accumulates on the refrigerant liquid. By the way, by providing the conical fourth partition plate (12), the sucked refrigerant liquid hits the inner wall of the side part (1b) of the cylindrical airtight container (1), so that the upper part of the second partition plate (4) Is prevented from directly flowing into the liquid surface existing in the liquid, and since the refrigerant gas does not directly hit the liquid surface, disturbance of the liquid surface is prevented, and the state of the liquid surface is kept constant. Therefore, the lubricating oil and the refrigerant liquid can be efficiently separated, so that the lubricating oil can be selectively collected and returned to the compressor, ensuring the reliability of the compressor and damaging the compressor. Can be prevented.

FIG. 4 shows a case where a conical fourth partition plate (12) is provided below the first partition plate (3). The upper portion or both sides of the first partition plate (3) is provided. The fourth conical partition plate (1
Even if 2) is provided, by preventing the liquid surface from being disturbed, the state of the liquid surface can be kept constant, and therefore, the lubricating oil and the refrigerant liquid can be efficiently separated. Can be selectively collected and returned to the compressor, ensuring the reliability of the compressor and preventing damage to the compressor.

FIG. 4 shows an example in which a conical fourth partition plate (12) is provided on the accumulator shown in FIG. 1, but a similar conical fourth partition is provided on the accumulator shown in FIG. A plate (12) may be provided, and a similar effect can be obtained.

Embodiment 4 FIG. Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings. FIG.
In FIG. 1, the same or corresponding parts as those in FIG. FIG. 5 shows a screen in which a wire mesh screen (13) is provided between the first partition plate (3) and the second partition plate (4) of the first embodiment. As already mentioned, while the refrigerant liquid and the lubricating oil remain in the second partition plate (4),
Lubricating oil having a lower specific gravity than the refrigerant liquid accumulates on the refrigerant liquid.
By providing a wire mesh screen (13) between the first partition plate (3) and the second partition plate (4), the refrigerant liquid and the lubricating oil pass through the wire mesh screen (13). At this time, the viscous lubricating oil and the refrigerant liquid are separated by the low-viscosity refrigerant liquid flowing first. As a result, even when a large amount of wet refrigerant flows into the closed cylindrical container (1) at one time from the suction pipe (2), the refrigerant liquid and the lubricating oil are efficiently separated, and the lubricating oil is selectively compressed. Can be returned to the compressor, ensuring the reliability of the compressor and preventing damage to the compressor.

FIG. 5 shows a first partition plate (3) and a second partition plate.
(4) is provided with a screen (13) in the form of a wire mesh. However, even if it is provided above the first partition plate (3), the refrigerant liquid and the lubricating oil can be efficiently separated, The lubricating oil can be selectively returned to the compressor, ensuring the reliability of the compressor and preventing the compressor from being damaged.

The wire mesh screen (13) can be similarly applied to the configuration of the second or third embodiment, and can provide the same function and effect.

Embodiment 5 FIG. Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings. FIG.
In FIG. 7, the same or corresponding parts as those in FIG. FIG. 6 shows an upper wall (1) of a cylindrical airtight container (1) separately from a discharge pipe (7) having a small hole (8) opened at the bottom side or near the side wall of the cylindrical airtight container.
a), a second discharge pipe (7a) is provided in the cylindrical airtight container (1) and opened to face the first partition plate (3).
When the refrigerant humid from the suction pipe (2) flows into the cylindrical closed container (1), the refrigerant gas is discharged together with the discharge pipe (7) into the second discharge pipe (7).
Since the refrigerant gas is sent to the compressor through a), the amount of the refrigerant gas passing through the first partition plate (3) decreases, so that the flow rate of the refrigerant gas at that time decreases, and the second partition plate (4) By preventing disturbance of the liquid level accumulated in the upper part, the state of the liquid level can be kept constant and the lubricating oil and the refrigerant liquid can be efficiently separated, so that the lubricating oil can be selectively compressed. It can be returned to the compressor, ensuring the reliability of the compressor and preventing damage to the compressor.

FIG. 6 shows a first partition plate which penetrates through the upper wall (1a) of the cylindrical container (1) shown in the first embodiment, and
Although a second discharge pipe (7a) opened opposite to (3) is provided, this second discharge pipe (7a) can be similarly applied to the configurations of Embodiments 2 to 4, and Function and effect can be achieved.

[0035]

Since the present invention is configured as described above, it has the following effects.

According to the invention of claim 1, connected to a suction pipe of the discharge pipe into the cylindrical closed vessel, the gasified refrigerant causes sucked into the compressor from the top Symbol discharge pipe in the cylindrical closed vessel, In an accumulator configured to allow the separated lubricating oil to be sucked into the compressor, a suction pipe opened above the cylindrical closed container, a discharge pipe having an opening disposed below the opening of the suction pipe, and A first partitioning means provided between the suction pipes and having a communication hole, and a second partitioning means provided below an opening of the discharge pipe and having a rising wall so as to be able to store liquid from the suction pipe; A U-shaped pipe, one end of which is connected to the second partition means and the other end of which is below the upper end of the rising surrounding wall, and which opens into a space communicating below the second partition means; Level with the opening at the other end of the pipe And oil return means for returning oil from the liquid stored in the first partition means to the compressor, so that even in the case of lubricating oil having a lower specific gravity than the refrigerant liquid, the refrigerant separated in the accumulator. Gas and lubricating oil are efficiently sucked into the compressor to prevent insufficient lubrication, thereby ensuring the reliability of the compressor and preventing the compressor from being damaged.

According to the second aspect of the present invention, the suction pipe and the discharge pipe are connected to the cylindrical closed container, and the refrigerant gasified in the cylindrical closed container is sucked into the compressor from the discharge pipe by the compressor. In an accumulator configured to allow the separated lubricating oil to be sucked into the compressor, a suction pipe opened above the cylindrical closed container, a discharge pipe having an opening disposed below the opening of the suction pipe, and A first partitioning means provided between the suction pipes and having a communication hole, and a second partitioning means provided below an opening of the discharge pipe and having a rising wall so as to be able to store liquid from the suction pipe; The third partitioning means provided between the second partitioning means and the bottom of the cylindrical hermetic container and capable of storing liquid, and the third partitioning means communicates with the second partitioning means. One end is connected to the third partition means and the other A pipe opened below the upper end of the rising surrounding wall, and oil return means provided at the same level as the opening at the other end of the pipe and returning oil from the liquid stored in the first partition means to the compressor. With this arrangement, the same effect as the third aspect of the invention can be obtained.

Further, according to the invention of claim 3 , claim 1
In addition to the invention of or 2 , in addition to the provision of a conical fourth partition plate on the upper, lower or upper and lower portions of the first partition means, it is possible to prevent the sucked refrigerant liquid from directly flowing into the refrigerant liquid level, By preventing the liquid surface from being disturbed, the same effect as the second aspect of the invention can be obtained.

According to the fourth aspect of the present invention,
In addition to the invention of the first, second or third aspect , a wire mesh screen is provided above the first partitioning means or between the first partitioning means and the second partitioning means. By promoting the separation, the same effect as the invention of claim 3 can be obtained.

Further, according to the invention of claim 5, claim 2, 3 or in addition to the fourth invention, through the upper part of the accumulator body, the second which is open above the cylindrical closed vessel Since the discharge pipe is provided, the same effect as the third aspect of the invention can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of an accumulator according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view of an accumulator according to a second embodiment of the present invention.

FIG. 4 is a sectional view of an accumulator according to a third embodiment of the present invention.

FIG. 5 is a sectional view of an accumulator according to a fourth embodiment of the present invention.

FIG. 6 is a sectional view of an accumulator according to a fifth embodiment of the present invention.

FIG. 7 is a sectional view of a conventional accumulator.

FIG. 8 is a refrigerant circuit diagram of the refrigeration cycle device.

FIG. 9 is a refrigerant circuit diagram of a conventional refrigeration cycle device.

FIG. 10 is a sectional view of an accumulator in a conventional refrigeration cycle device.

FIG. 11 is a refrigerant circuit diagram of a conventional refrigeration cycle device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cylindrical airtight container, 1a top wall, 1b bottom wall (bottom), 1c side wall (side), 2 suction pipe, 3rd partition (first partitioning means), 4th partition (first Second partition means), 4a rising wall, 5 lubricating oil return pipe (oil return means), 6U pipe, 7 discharge pipe, 7a second discharge pipe, 8 small hole, 9 third partition plate (third partition) Partition means), 10 communication pipes, 11 straight pipes, 12 fourth partition plates, 13 screens, 14 compressors, 15 condensers,
16 decompressor, 17 evaporator, 18 accumulator ,
5 1 compressor, 52 condenser, 53 decompression device, 54
Evaporator, 55 accumulator, 56 suction pipe, 57
Discharge pipe, 58 Oil return pipe, 59 discharge pipe, 60 heating device, 61 valve, 62 liquid storage device, 63 liquid level detector, 64 refrigerant saturation temperature detector, 65 refrigerant temperature detector, 71 compressor, 72 squares Valve, 73 indoor heat exchanger,
74a check valve, 74b check valve, 75 receiver, 7
6a decompressor, 76 b vacuum equipment.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takayuki Yoshida 3-1-1, Oka, Shizuoka-shi Mitsubishi Electric Corporation, Living Environment Engineering Management Center (72) Inventor Masao Nagano 3-1-1, Oka, Shizuoka-shi No. Mitsubishi Electric Corporation, Living Environment Engineering Management Center (72) Inventor Atsushi Edayoshi 3-18-1, Oka, Shizuoka-shi Mitsubishi Electric Corporation, Living Environment Engineering Management Center (72) Inventor Masaru Konishi Tokyo 2-6-2 Otemachi, Chiyoda-ku Nippon Kentetsu Co., Ltd. (72) Inventor Toshihide Koda 8-1-1 Honcho Tsukaguchi, Amagasaki City Mitsubishi Electric Corporation Central Research Laboratory (72) Inventor Yoshihiro Sumida Amagasaki City 8-1-1, Tsukaguchi Honcho Mitsubishi Electric Corporation Central Research Laboratory (72) Inventor Takashi Okazaki Nani 8-1-1, Tsukaguchi-Honmachi, Saki-shi Mitsubishi Electric Corporation Central Research Laboratory (72) Inventor Yoshihisa Kito 3-181-1, Oka, Shizuoka-shi Mitsubishi Electric Corporation Shizuoka Works (72) Inventor Osamu Morimoto 6-5-66 Tegami, Wakayama City Mitsubishi Electric Corporation Wakayama Works (72) Inventor Tomohiko Kasai 6-5-6 Teira Wakayama City Mitsubishi Electric Wakayama Works (56) References JP 61 JP-A-58-31266 (JP, A) JP-A-58-31266 (JP, U) JP-A-63-34968 (JP, U) JP-A-56-26374 (JP, U) JP-B-57-17187 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 43/00 F25B 43/02 F04B 39/02

Claims (5)

(57) [Claims] 1. A connected to the cylindrical closed vessel and the suction pipe discharge pipe, the gasified refrigerant in the cylindrical closed vessel together is sucked into the compressor from the discharge pipe, the separated lubricating oil to the compressor In an accumulator that is made to inhale,
A suction pipe opened above the cylindrical airtight container, and
Discharge pipe having an opening arranged below the opening of the inlet pipe
Partition having a communication hole provided between the suction pipe and the suction pipe
Means, and the suction pipe provided below the opening of the discharge pipe
With a rising wall so as to be able to store liquid from
One end is connected to the second partitioning means and the second partitioning means.
The other end is below the upper end of the rising surrounding wall, and
U-shaped opening in the space communicating below the second partition means
At the same level as the pipe and the opening at the other end of the U-shaped pipe
Compresses oil from the liquid stored in the first partition means provided
An accumulator comprising: oil return means for returning the oil to the machine . 2. A suction pipe and a discharge pipe are connected to a cylindrical airtight container.
In the accumulator, the refrigerant gasified in the cylindrical closed container is sucked into the compressor from the discharge pipe, and the separated lubricating oil is sucked into the compressor.
A suction pipe opened above the cylindrical airtight container, and
Discharge pipe having an opening arranged below the opening of the inlet pipe
And the first partitioning means for have a communication hole provided between the suction pipe, the suction pipe located below the opening of the discharge pipe
With a rising wall so as to be able to store liquid from
The second partitioning means, the second partitioning means and the bottom of the cylindrical closed container
A third partitioning means provided between the first and second parts, and capable of storing a liquid;
Communicating the third partitioning means with the second partitioning means
With one end connected to the third partitioning means and the other end
The pipe opened below the upper end of the rising wall and the upper
The first is provided at the same level as the opening at the other end of the pipe.
An accumulator comprising: oil return means for returning oil from the liquid stored in the partition means to the compressor . 3. The upper, lower or upper and lower portions of the first partition means.
3. The method according to claim 1, wherein a conical fourth partition plate is provided on the portion.
Accumulator as described . 4. An upper part of the first partitioning means or the first partitioning means.
A wire mesh screen between the cutting means and the second partition means
The accumulator according to any one of claims 1 to 3, which is provided . 5. A second, open upper part in a cylindrical airtight container.
The accumulator according to any one of claims 1 to 4, further comprising a discharge pipe .