JP3510673B2 - 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 for separating a gas-liquid mixture in which a gas and a liquid are mixed into a gas and a liquid, and more particularly to an accumulator incorporated in a refrigeration cycle of a refrigerator or an air conditioner. .

[0002]

2. Description of the Related Art For example, in a refrigerating cycle, a refrigerant which could not be completely evaporated in an evaporator is sucked into a compressor in a liquid state and a so-called liquid back phenomenon is prevented from occurring in the compressor. The accumulator is built in between the machine.

Such a conventional accumulator is disclosed in Japanese Utility Model Publication No. 5
As disclosed in JP-A-5-48370 and JP-B-62-55588, a refrigerant mixed with a gas and a liquid is introduced from an upper end portion of a container, and the mixed refrigerant is applied to a guide plate to form a liquid refrigerant. Is dropped into the lower part of the container, and only the gaseous refrigerant is taken in from the upper part of the container and led out to the compressor.

In this type of accumulator, from the viewpoint of ease of manufacture and improvement of assemblability, Japanese Patent Publication No. 4-80.
As disclosed in Japanese Patent No. 314, a shell cover (top plate side) of a container in which an inlet pipe and an outlet pipe of a refrigerant are put together.
It is desirable to place it in.

[0005]

However, in the above-mentioned conventional accumulator, since the outlet pipe and the inlet pipe are directly fixed to the shell cover of the container, the holes to which these pipes are attached are attached to the shell cover of the container. It is necessary to form a rise around the periphery of the pipe (burring hole processing), weld these pipes, and braze with copper or the like. Therefore, the conventional accumulator has a problem that it takes time to manufacture and pinholes are easily generated in the brazed portion, which causes leakage. Especially in the accumulator,
If you fix the outlet pipe and the outlet pipe only with the shell cover,
There is a problem in that vibration generated by a compressor or the like cannot be completely suppressed.

In such a case, it may be considered that the inlet pipe and the outlet pipe are separately fixed by the respective fixing members, but a plurality of fixing members are required, and the guide plate is also fixed inside the container. Therefore, there is a problem that the structure becomes complicated and the manufacturing becomes complicated due to an increase in the number of parts and an increase in welding points.

Therefore, an object of the present invention is to provide an accumulator having a simple structure and easy to manufacture.

[0008]

A first invention is a container,
In an accumulator having an inlet pipe for introducing a gas-liquid mixture, a guide plate for guiding the introduced gas-liquid mixture, and an outlet pipe for taking in and separating the gas separated in the container, in the container, said inlet pipe, said guide plate above the and the fixed plate has a fixed plate for holding said outlet tube
It is characterized in that it is located integrally in front of the lower end of the inlet pipe .

A second aspect of the present invention is a container, an inlet pipe for introducing the gas-liquid mixture, a guide plate for guiding the introduced gas-liquid mixture, and one end located above the container and separated in the container. in accumulator having an outlet tube for deriving captures gaseous, into the said container, said inlet tube, the guide plate is above the and the fixed plate has a fixed plate for holding said outlet tube It is characterized in that it is integrally formed at the front of the lower end of the inlet pipe, and that the fixing plate is fixed to the upper shell cover that constitutes the container.

[0010]

According to the first aspect of the present invention, since the inlet pipe and the outlet pipe are held by the single fixing plate, the outlet pipe and the inlet pipe can be reliably fixed. Therefore, the accumulator can be easily manufactured. Moreover, since the inlet pipe and the outlet pipe are fixed by one fixing plate, the number of parts can be reduced.

Further, since the guide plate is formed integrally with the fixed plate, the number of parts is small and the structure is simple.
The number of welding points during manufacturing can be reduced. Therefore, the structure is simple and the manufacturing is easy.

According to the second aspect of the present invention, the inlet pipe and the outlet pipe are collectively arranged in the upper shell cover, which is a so-called upper and lower split system, so that the ease of manufacture and the assemblability can be further improved. it can.

[0013]

EXAMPLE An accumulator according to this example will be described below using an air conditioner as an example.

As shown in FIG. 6, an air conditioner 6 includes a compressor (compressor) 1 for compressing a refrigerant, an outdoor heat exchanger 2, a pressure reducer 4, an indoor heat exchanger 3, and an accumulator 5 in this order. It is provided with a refrigerant circulation circuit. In this refrigerant circuit, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 1 is condensed by the outdoor heat exchanger 2,
It is evaporated in the indoor heat exchanger 3 via the pressure reducer 4 and performs cooling operation.

The accumulator 5 is provided between the compressor 1 and the indoor heat exchanger 3 to prevent liquid return of the compressor.

In the accumulator 5, as shown in FIGS. 1 and 2, the container 10 is composed of a case body 11, an upper shell cover 13a, and a lower shell cover 13b.

An inlet pipe 14 for introducing a refrigerant as a gas-liquid mixture in which a gas and a liquid are in a mixed state into the container 10.
A guide plate 15 for receiving the gas-liquid mixed refrigerant introduced from the inlet pipe 14, an outlet pipe 16 for taking out only the gaseous refrigerant separated in the container 10, and an inlet pipe 14 and an outlet in the container 10. A fixing plate 17 for fixing the pipe 16 is provided.

The inlet pipe 14 is inserted through a hole formed in the upper shell cover 13a, and its upper end is
It is airtightly held on the upper shell cover 13a by welding or brazing. A refrigerant pipe circulated from the outdoor heat exchanger 3 is connected to the upper end portion of the inlet pipe 14.

The lower end portion 14a of the inlet pipe 14 extends to the upper end portion in the container 10 so that the refrigerant is jetted from the upper portion of the container 10. Lower end 14 of outlet pipe 14
a is inserted into the first holding hole 19 formed in the fixed plate 17 and held by the container.

The outlet pipe 16 is formed in a substantially U shape, and one end portion 16a thereof extends outward from the upper shell cover 13a and is connected to the compressor 1 of the refrigerant circuit.

The other end 16b of the U-shape is opened at the top in the container 10. The other end 16b is inserted into the second holding hole 21 formed in the fixed plate 17,
It is fixed to the fixing plate 17 by welding or brazing.

The holes 20a and 20b formed in the upper portion and the lower portion of the outlet pipe 16 are a pressure balancing hole and an oil return hole, respectively.

As shown in FIG. 3, the fixing plate 17 has a first holding hole 19 for holding the inlet pipe 14 and the outlet pipe 16 described above, and a second holding hole 21. The pipe 14 and the outlet pipe 16 are fixed to these holes 19 and 21 or to the fixing plate 17 by brazing welding. Therefore,
Two of the inlet pipe 14 and the outlet pipe 16 are provided by one fixing plate 17.
Since the two tubes are fixed, the number of parts can be reduced. In addition, a portion to be welded to the inside of the container can be eliminated, and the structure is simple and the manufacturing is easy.

The periphery of the fixing plate 17 is fixed to the inside of the upper shell cover 13a by welding or brazing.

This fixed plate 17 is the inlet pipe 1 in this embodiment.
The gas-liquid mixed refrigerant introduced from 4 and the gas refrigerant to be taken in from the other end of the outlet pipe 16 also have a function of separating so as not to mix with each other, and a plate-like shape is formed to vertically separate the inside of the container 10. Is formed in.

The fixed plate 17 is further integrally provided with a guide plate 15 at a position opposed to the first holding hole 19. The fixed plate 17 and the guide plate 15 are formed by bending a single sheet metal.

The guide plate 15 has a rising portion 23 with respect to the fixed plate 17, and is further bent from the rising portion 23, and as shown in FIG. It is formed in a letter shape.

The bending angle of the guide plate 15 may be formed at a right angle to the rising portion 23, or may have a predetermined angle Θ as shown in FIG. . Further, the guide plate 15 may form an angle in a desired direction. In this way, if the configuration is such that an angle is formed in the desired direction, it is possible to guide the liquid refrigerant that hits the guide plate 15 and is scattered to the intake port side of the outlet pipe 16, so that only the gas refrigerant is reliably ensured. Can be derived.

Next, the operation of this embodiment will be described.

In the refrigeration cycle, the outdoor heat exchanger 3
The refrigerant as a gas-liquid mixture containing the liquid refrigerant that has not been completely evaporated in the above is introduced into the accumulator 5 before being supplied to the compressor 1, where it is separated from the liquid refrigerant gas-liquid mixed refrigerant and only the gas refrigerant is compressed by the compressor 1. Supply to. This prevents the so-called liquid back phenomenon from occurring in the compressor 1.

In the accumulator 5, a refrigerant containing a mixture of liquid and gas is supplied from the inlet pipe 14. This refrigerant is
It is dissipated in a guide plate 15 provided in front of the inlet pipe 14,
The liquid refrigerant discharged here loses its velocity and is guided in the circumferential direction, and at the same time, stirring, bubbling and scattering of the liquid stored in the lower portion of the container 10 are prevented.

The liquid refrigerant, which has lost its velocity, falls to the bottom of the container 10 as it is or travels along the inner wall of the container 10 to form the container 1.
As shown in FIG. 2, the gas refrigerant above 0 is taken in from the other end 16b of the outlet pipe 16, passes through the U-shaped outlet pipe 16, is led out from the one end 16a thereof, and is fed to the compressor 1. Be guided.

On the other hand, in manufacturing the accumulator 5, the inlet pipe 14 is held by passing through the upper shell cover 13a, and then the one end portion 14a of the inlet pipe 14 is passed through the first holding hole 19 formed in the fixing plate 17. Hold. Outlet pipe 16
Has one end thereof passed through the second holding hole and is fixed to the fixing plate 17 by spot welding or brazing, and the fixing plate 17
Is similarly fixed to the inside of the upper shell cover 13a by spot welding. The other end portion 16a has an upper shell cover 13
It is fixed to a by welding or brazing. Finally, the main body is assembled with the upper shell cover 13a and the lower shell cover 13b and welded or brazed.

As described above, according to this embodiment, the fixing plate 17
Since the inlet pipe 14 and the outlet pipe 16 are fixed to the inlet pipe 14, the inlet pipe 14 and the outlet pipe 16 can be held securely and
There is no need to perform burring hole processing or special welding on the upper shell cover 13a.

Further, since the inlet pipe 14 and the outlet pipe 16 are arranged collectively on the upper part of the container, the assembling work can be performed only on the upper shell cover 13a, so that the manufacturing is easy and simple.

On the other hand, the fixed plate 17 is manufactured by forming a hole in a sheet of metal or by bending it with a press or the like at the same time. Therefore, the number of parts can be reduced, and the fixing plate 17 having the guide plate 15 can be easily manufactured by a simple process.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified without departing from the gist of the present invention.

For example, the first holding hole 19 and the second holding hole 21
Are not limited to be formed on the same surface, but may be formed on different surfaces as shown in FIG. In this case, the inlet pipe 14 is formed by forming the first holding hole in the smaller bent piece.
Is held, and the piece facing this is used as the guide plate 15.

Further, as shown in FIG. 5, the opening of the other end portion 16b, which is the inlet for the gas refrigerant of the outlet pipe 16, may be obliquely cut to enlarge the area of the inlet.

Further, the accumulator of the present invention is not limited to the refrigerant circuit, and the same effect can be obtained even if it is used in a steam engine using steam as a gas-liquid mixture.

[0041]

According to the first aspect of the present invention, since the inlet plate and the outlet pipe are held by the fixing plate, the outlet pipe and the inlet pipe can be reliably fixed. Therefore, the accumulator can be easily manufactured. Moreover, since the inlet pipe and the outlet pipe are fixed by one fixing plate, the number of parts can be reduced.

Furthermore, since the guide plate is formed integrally with the fixed plate, the number of parts is small and the structure is simple.
Welding points during manufacturing can also be reduced. Therefore, the structure is simple and the manufacturing is easy.

According to the second aspect of the invention, the inlet pipe and the outlet pipe are collectively arranged in the upper shell cover, which is a so-called upper and lower split system. Therefore, the easiness of manufacturing and the assembling property can be further improved. it can.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing a characteristic portion of the present invention.

FIG. 3 is a perspective view of a fixing plate shown in FIG.

FIG. 4 is a sectional view of the fixing plate shown in FIG.

FIG. 5 is a perspective view showing another embodiment of the present invention.

FIG. 6 is a circuit diagram of an air conditioner in which the accumulator shown in FIG. 1 is used.

[Explanation of symbols]

5 Accumulator 10 containers 14 Inlet pipe 15 Information board 16 outlet pipe 17 Fixed plate

Claims (2)

(57) [Claims] 1. A container, a inlet pipe for introducing a gas-liquid mixture, a guide plate for guiding the introduced gas-liquid mixture, and an outlet pipe for taking in and discharging the gas separated in the container. In the accumulator, the container has a fixing plate that holds the inlet pipe and the outlet pipe, and the guide plate is located on the fixing plate in front of a lower end portion of the inlet pipe.
Accumulator, characterized in that provided integrally with. 2. A container, an inlet pipe for introducing the gas-liquid mixture, a guide plate for guiding the introduced gas-liquid mixture, one end of which is located above the container, and a gas separated in the container. in accumulator having an outlet tube which takes in deriving, wherein the container, said inlet tube, said outlet tube and the guide plate to and the fixing plate has a fixed plate which holds the previous
An accumulator, characterized in that it is integrally formed at the front of the lower end of the entry port tube, and that the fixing plate is fixed to an upper shell cover constituting the container.