JP3396770B2 - Integrated refrigeration cycle component for air conditioner and air conditioner provided with the component - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-cooled air conditioner, and more particularly to an integrated structure of refrigeration cycle parts around a heat exchanger.

[0002]

2. Description of the Related Art FIG. 4 is a system diagram showing an example of a refrigeration cycle of an air conditioner. This air conditioner is composed of an outdoor unit and an indoor unit, and generally operates as follows during cooling. On the outdoor unit side, the high-temperature and high-pressure gas refrigerant discharged from the compressor 30 is fed to the outdoor heat exchanger 32 via the four-way valve 31, where it is condensed to become a liquid refrigerant, and this liquid refrigerant is non-returned. It is fed from the outdoor unit to the indoor unit via the valve 36 and the opening / closing valve 37. In the indoor unit, the inflowing liquid refrigerant passes through the strainer 24 and enters the expansion valve 25, where it is decompressed to become a liquid / gas mixed refrigerant containing droplet-like refrigerant, and further passes through another strainer 24 to reach the distributor 25. to go into. The liquid / gas mixed refrigerant is sent from the distributor 25 to the heat exchanger 21 via a plurality of pipes. Heat exchanger 2
Reference numeral 1 is an evaporation tube connected to each pipe coming from the distributor 25, and the droplet-like refrigerant is evaporated into a vapor in this evaporation tube. This refrigerant vapor is collected in the header 27 through a plurality of return intervals 26, returns from the indoor unit to the indoor unit, and returns from the four-way valve 31 to the compressor 30 via the accumulator 40.

In the indoor unit of the air conditioner configured as described above, as shown in FIG. 5, the expansion valve 23, the strainer 24, the distributor 25, the header 27, and other parts are copper pipes of various lengths. Since they are connected in a three-dimensional form, they have the following drawbacks.

(1) There are many pipe connection points between parts, and the number of processing steps such as brazing of connection points is high, and the cost is high. (2) Since there are many brazing points, it takes time for the airtight test. 3) Inside the indoor unit, the expansion valve 23 to the header 2
It is difficult to secure a space for accommodating the assembly of No. 7, and it is often necessary to install it on the ventilation surface of the heat exchanger. Therefore, the flow of air from the blower 22 (see FIG. 5) is disturbed, and the performance of the heat exchanger deteriorates, and the refrigerant flow noise easily leaks out of the machine.

(4) Butyl rubber, which has a relatively large mass, is wound around the sound generating part as a soundproof material in order to prevent the refrigerant flow noise, but the work space is narrow due to the presence of piping parts around it, and Since the device element is a cylinder, the attachment work on the cylindrical surface is troublesome and time-consuming.

[0006]

The prior art has not taken into consideration compactification by integrating a plurality of parts in order to facilitate the assembly work and piping work of the refrigeration cycle piping system, and the mass production There is a problem that the air-cooled heat exchanger that is a product is expensive.

An object of the present invention is to provide an integrated refrigeration cycle component for an air conditioner, which is suitable for facilitating assembly work and piping work of a refrigeration cycle piping system.

[0008]

In order to achieve the above object, the following technical means are used. The integrated refrigeration cycle component for an air conditioner of the present invention is an assembly of a refrigeration cycle strainer, a distributor, and a header. These are drawn from two steel plates and joined together with a brazing material at their mating surfaces. It is composed. That is,
The integrated refrigeration cycle component of the present invention includes a strainer for filtering a refrigerant, an expansion valve for expanding the refrigerant, a distributor for distributing the expanded refrigerant to a plurality of heat exchangers, and a plurality of heat exchangers. It is an integrated refrigeration cycle component in which container-shaped parts of the header that receive the split flow and return refrigerant are collected and joined by piping, and the upper half of each container of the strainer, distributor, and header is arranged in a plane and molded. , And one metal plate having a pipe connection port formed in the upper half of each container, and the lower half of the container corresponding to the upper half of each container are arranged in a plane and molded, and in the lower half of each container. It is characterized in that another metal plate having a pipe connection port is combined with each other so as to form each container, and is integrated by brazing.

[0009] Then, connect the pipe vessel lower half of de I string Byuta introducing the refrigerant to the central portion, whereas the flat portion halves on the container at a site facing the connection port of the lower container half It has, and providing a pipe for distributing the refrigerant to a more high ceiling portion around the flat portion. Also a plurality of return piping connections of the header arranged in a row, characterized next to each other in the header, two strainer to parallel rows of a plurality of return piping connections, placing sequentially one row distributor In this case, it is preferable to further form an elongated hole in the metal plate at the middle of the header and the strainer, the middle of the header and the distributor, and the middle of the strainer and the distributor so that the boundary of each component is provided on the metal plate. .

The integral refrigeration cycle component of the present invention is
Manufactured brazed in a furnace, is in each strainer in the ambient is decorated plate screen surrounded by the frame, and wherein the brazing and the frame and the container.

[0011]

In the present invention, since the strainer, the distributor and the header are formed by molding two metal plates and integrally brazing them, this integrated refrigeration cycle component becomes compact and disassembled during assembly and maintenance. -Reassembly can be completed in a short time. Further, since the integrated refrigeration cycle component has a flat shape as a whole, the piping connection port is also arranged in a plane, so that the piping work can be facilitated and the soundproofing material can be easily adhered.

Further, the distributor is provided with a flat portion at a portion facing the introduction port and a pipe for distributing the refrigerant to a portion having a higher ceiling around the flat portion. It is possible to distribute the refrigerant evenly by dispersing it in all directions. In addition, since a long hole is provided in the metal plate in the middle of the header and strainer, the middle of the header and distributor, etc., the entire integrated refrigeration cycle component can be deformed according to the shape at the mounting location, and the space at the mounting location is reduced. Easy to fit. This long hole is useful for checking the airtightness of the brazing part of two metal plates.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows, as an integrated refrigeration cycle component for an air conditioner, a collective component including two strainers and one expansion valve, a distributor, and a header that constitute an indoor unit. 2 is a sectional view taken along the line II-II of FIG. 1 showing the configuration of the distributor, and FIG. 3 is a sectional view taken along the line III-III of FIG. 1 showing the configuration of the strainer. The integrated refrigeration cycle component shown in FIG. 1 corresponds to the "A" portion shown by the chain double-dashed line in FIG.

The integrated refrigeration cycle component of this embodiment includes a strainer 2A, an expansion valve 1, a strainer 2B, a distributor 3, and a plurality of outlet side pipes (which are connected to a heat exchanger) connected to the strainer 2A in this order. The header 4 and a plurality of inlet side pipes of the header 4 (connected from the heat exchanger). Note that, in FIG. 1, the flow direction of the refrigerant when the air conditioner is in the cooling operation is indicated by an arrow, and when the air conditioner is in the heating operation, the refrigerant flows in the opposite direction to that in FIG.

The strainer 2A, the strainer 2B, the distributor 3 and the header 4 each have a flat container shape and are arranged in a plane. For these flat containers, two metal plates are drawn to form the upper and lower halves of each container on each metal plate, then the connection port of the pipe is punched with a press, and the connection port is burred. Then, a rising portion is provided, and then these two pressed metal plates are put together, and the mating surfaces are joined with a phosphor bronze-based brazing material to manufacture. At this time, at the same time, appropriate pipes are also arranged using a jig and brazed. The brazing is carried out in a furnace with an inert atmosphere, but during this brazing in the furnace, the expansion valve is not attached from the viewpoint of its heat resistance and will be brazed in a later step. Since the pipe connection port and the rising portion are pressed on the flat container as described above, it is possible to simultaneously process a plurality of holes at the joint ports of the header 4 and the multiple branch pipes of the distributor 3.

In addition, in order to prevent the brazing filler metal from leaking from the outer peripheral portion of the integrated refrigeration cycle component during brazing in the furnace and to facilitate the repair of airtight leakage, as shown in FIGS. A rise 6 is formed on the outer peripheral portion of the component. The rising portion 6 is a component shown in FIG. 1, and is formed over the entire outline line except for the refrigerant inlet / outlet to the outdoor unit at the right end in the figure.

In addition, elongated holes 5 are provided in the metal plates between the plate strainers 2A and 2B and between the strainers 2A and 2B and the header 4 so that the leaked portion can be easily found in the air tightness test. Since the elongated hole 5 facilitates bending between the plate strainers 2A and 2B and between the plate strainers 2A and 2B, it is possible to arrange the integrated refrigeration cycle component in a limited space in the indoor unit. It is easy and has a great effect on downsizing of refrigeration cycle parts. By the way, it is needless to say that most of the surrounding plates may be appropriately removed like the distributor 3 shown in FIG. 1 without providing the elongated holes 5.

In the distributor 3 shown in FIG. 2, a flat portion 7 is provided in the upper half portion of the container 3, and the flat portion 7 is provided so as to face the central refrigerant inlet of the lower half portion of the container. Refrigerant liquid particles introduced from the opening located in the center of the flat part 7 collide with the flat part 7 and are finely pulverized and dispersed in four directions, and are evenly discharged from a plurality of distribution outlets provided in the area around the flat part 7. Therefore, the evaporation of the refrigerant in the heat exchanger can be efficiently performed.

The strainer 2 (2A, 2B) shown in FIG.
Had a flat strainer screen 8 placed inside it and was brazed in the furnace simultaneously with the metal plate. A screen holder 9 was used as a frame surrounding the outer periphery of the screen 8 in order to prevent the brazing material from flowing into the strainer during brazing in the furnace. The screen holder 9 was provided with a start-up 10 by burring. The brazing material was annularly arranged at the contact portion between the screen holder 9 and the container.

[0020]

The present invention has the following effects.

(1) In the integrated refrigeration cycle component of the present invention, a plurality of components such as a strainer, a distributor and a header are integrally formed by press forming and brazing two metal plates, so that the manufacturing cost is reduced. And, it can be easily incorporated into the heat exchanger.

(2) In this integrated refrigeration cycle component, since each component is arranged in a plane and the long holes are provided in the metal plate portion connecting the components, it fits in a narrow space such as the side of the heat exchanger. It can be deformed, and the heat exchange performance is improved because the heat exchanger is not arranged on the ventilation surface as in the conventional case. Further, since the pipe connection port is also arranged in a plane, the piping work can be facilitated.

(3) The production management cost can be reduced by reducing the number of parts.

[Brief description of drawings]

FIG. 1 is a perspective view of an integrated refrigeration cycle component for an air conditioner according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG. 1, showing the structure of the distributor.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1, showing the structure of the strainer.

FIG. 4 is a diagram showing an example of a refrigeration cycle system of an air conditioner.

[Fig. 5] Fig. 5 is a diagram showing an assembled state of each component forming a refrigeration cycle in a conventional indoor unit.

[Explanation of symbols]

1 expansion valve 2, 2A, 2B strainer 3 distributors 4 header 5 slots 6 rising

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuhito Muramatsu 390 Muramatsu, Shimizu City, Shizuoka Prefecture, Hitachi, Ltd., Air Conditioning Systems Division (72) Inventor, Futoshi Kawamura 390 Muramatsu, Shimizu City, Shizuoka Hitachi, Ltd., Air Conditioning Systems Business (56) Reference JP-A-4-98057 (JP, A) JP-A-60-141365 (JP, A) JP-A-4-148167 (JP, A) JP-A-4-91822 (JP, A) JP 58-195793 (JP, A) Actual opening 50-142569 (JP, U) Actual opening 62-160238 (JP, U) Actual opening Flat 3-76653 (JP, U) Actual opening 64-42771 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) F25B 41/00 F25B 41/06 F25B 43/00 F25B 39/02 F25B 39/04 F24F 5/00 B23K 1/12 B23K 1/20 B23K 1/00 330

Claims (5)

(57) [Claims] 1. A strainer for filtering a refrigerant, an expansion valve for expanding the refrigerant, a distributor for distributing the expanded refrigerant to a plurality of heat exchangers, and a refrigerant for diverting and returning from the heat exchanger. In the integrated refrigeration cycle parts for air conditioners in which the container-shaped parts of the header are assembled and joined by piping, the strainer, distributor, and the upper half of each container of the header are arranged in a plane, and molded. One metal plate with a pipe connection port formed in the part and the lower half part of the container corresponding to the upper half part of each container are planarly arranged and molded, and the pipe connection port is formed in the lower half part of each container. and another metal plate, combined to form each container, constructed and integrated by brazing, wherein the di
The lower half of the container of the distributor introduces the refrigerant into the center.
Connect the piping, while on the distributor vessel
The half part is flat on the bottom half of the container facing the pipe connection port.
Around the flat part and with a higher ceiling
The feature is that multiple pipes for distributing the refrigerant are evenly arranged in the part.
Integral refrigeration cycle parts for air conditioners. 2. A strainer for filtering the refrigerant, expanding the refrigerant
Expansion valve, which distributes the expanded refrigerant into multiple heat exchangers
To the distributor and heat exchanger.
Each of the headers accepting refrigerant that splits back into a number
Integral type for air conditioner where container-shaped parts are assembled and joined by piping
Strainers and distributors for refrigeration cycle parts
The upper half of each container of the
One piece molded and formed with a pipe connection port in the upper half of each container
Of the metal plate and the lower half of the container corresponding to the upper half of each container
And mold them, and connect the pipe connection port to the bottom half of each container.
With the other metal plate that was formed, form each container
, And then integrated by brazing.
A plurality of return pipe connection ports are arranged in a line,
Adjacent to the header, in the row of multiple return pipe connection ports
The strainer and the distribution to be in parallel
Integral for air conditioner characterized by arranging data in a row
Shaped refrigeration cycle parts. 3. An intermediate between the header and the strainer, an intermediate between the header and the distributor,
3. The integrated refrigeration cycle component for an air conditioner according to claim 2 , wherein an elongated hole is formed in the metal plate so as to provide a boundary between the components in the middle of the strainer and the distributor. 4. A strainer for filtering the refrigerant, expanding the refrigerant
Expansion valve, which distributes the expanded refrigerant into multiple heat exchangers
To the distributor and heat exchanger.
Each of the headers accepting refrigerant that splits back into a number
Integral type for air conditioner where container-shaped parts are assembled and joined by piping
Strainers and distributors for refrigeration cycle parts
The upper half of each container of the
One piece molded and formed with a pipe connection port in the upper half of each container
Of the metal plate and the lower half of the container corresponding to the upper half of each container
And mold them, and connect the pipe connection port to the bottom half of each container.
With the other metal plate that was formed, form each container
And brazed together to form
Brazing is done in the furnace, and the inside of each strainer is surrounded.
The interior of the plate type screen surrounded by a frame,
It is characterized in that the container of the strainer is brazed.
Integrated refrigeration cycle parts for air conditioners. 5. An air conditioner comprising the integrated refrigeration cycle component for an air conditioner according to any one of claims 1 to 4 .