JPH03195873A - Refrigerant flow divider - Google Patents

Abstract

PURPOSE:To enable a uniform dividing of flow of refrigerant to be carried by a method wherein a refrigerant flow divider is comprised of a hollow body, a plurality of flow- out pipes fixed in sequence in a longitudinal direction of the hollow body and a feeding-in pipe inserted up to an end part, and the feeding pipe is provided with a flow-out hole of which diameter is decreased from an upper part to a lower part. CONSTITUTION:A refrigerant flow divider 11 is comprised of a cylindrical hollow body 2, a feeding-in pipe 3 inserted from a lower end 2L of the hollow body 2 to a part near an upper end and a plurality of flowing-out pipes 4 equally spaced apart at an outer circumferential side surface 2S of the hollow body 2. Refrigerant R for a heat exchanging operation passes from the flowing-in pipe 3 through a flowing-out hole 6 and into the hollow body 2. The refrigerant R of two gas and liquid phases has much volume of liquid compound in the flowing-out hole 6 and there are much amount of gaseous component in the upper flowing-out hole 6. Since the flowing-out hole 6 is reduced as it is lowered, refrigerant of much volume is flowed from the lower flowing-out hole 6. Accordingly, the refrigerant amount in respect to its weight is uniform in each of the flowing-out holes 6 and then an approximate uniform flow division of the refrigerant R for an entire flowing-out pipes 4 can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refrigerant flow divider for uniformly dividing refrigerant in a refrigeration cycle of an air conditioner, a refrigeration equipment, or the like.

Conventional technology In recent years, refrigerant flow dividers have been diversified in order to cope with the multiplication of refrigeration systems and the creation of multiple circuits due to the reduction in diameter of heat exchanger tubes due to the miniaturization of heat exchangers, and their importance has increased. It is increasing.

Among the refrigerant flow dividers mentioned above, cylindrical refrigerant flow dividers are often used because they are compact even after being attached to the side of the heat exchanger and are low cost (Utility Model No. 69-92).
Publication No. 383).

Hereinafter, the conventional cylindrical refrigerant flow divider mentioned above will be explained with reference to the drawings.

Figures 4 to 7 show the shapes of conventional dividing flow dividers. 1
Reference numeral 1 designates a refrigerant flow divider, which includes a cylindrical hollow body 12 whose longitudinal direction is vertical, an inflow pipe 13 connected to the lower end 12L of the hollow body 12 from vertically downward with brazing, and an outer circumferential side surface 12S of the hollow body 12. It is composed of a plurality of stages of flat outflow pipes 14 which are successively connected with brazing at equal intervals in the vertical direction. Further, the distal end of the outflow pipe 14 partially protrudes into the interior of the hollow body 12 and is connected by brazing. 16 is a heat exchanger, which includes a plurality of refrigerant pipes 16 arranged in parallel in the horizontal direction;
The fins 17 are provided between the fins 17. Furthermore, by connecting one longitudinal end of the refrigerant pipes 16 constituting the heat exchanger 16 and the outflow pipe 14 of the refrigerant flow divider 11, the refrigerant flow divider 11 is attached to the side surface of the heat exchanger. .

In addition to attaching the refrigerant flow divider 11 to the heat exchanger 16 by connecting the outflow pipe 14 and the refrigerant pipe 16, it is also possible to connect the outflow pipe 14 by directly inserting the refrigerant pipe 16 into the side surface 123 of the hollow body 12. It may be formed.

The operation of the refrigerant flow divider 11 configured as described above will be explained.

The refrigerant R for heat exchange flows into the hollow body 12 from the inflow pipe 13 of the refrigerant flow divider 11, and then gradually flows into the outflow pipe 14 connected to the side surface 123 while flowing vertically upward within the hollow body 12. , the refrigerant flows through each outflow pipe 14 to a plurality of refrigerant pipes 1θ of the heat exchanger 16.

Problems to be Solved by the Invention The refrigerant R evaporates or condenses inside the heat exchanger 15 and flows while gas and liquid coexist and separate. Therefore, in the above configuration, since the refrigerant R flows vertically upward in the hollow body 12 of the refrigerant flow divider 11, it is greatly affected by the gravity G, and gas and liquid are completely separated, and the refrigerant R flows into the outflow pipe 14. At this time, a large amount of the liquid phase with a high specific gravity flows into the lower outlet pipe 14L, and only the gas phase with a lower specific gravity flows into the upper outlet pipe 14H, causing uneven flow division. Therefore, there was a problem in that the amount of heat exchanged in the heat exchanger 15, which flows in through the outflow pipe 14, decreases.

In view of the above problems, the present invention provides a refrigerant flow divider capable of uniformly dividing refrigerant.

Means for Solving the Problems In order to solve the above problems, the refrigerant flow divider of the present invention includes a hollow body, a plurality of outflow pipes sequentially attached in the longitudinal direction of the hollow body, and an end pipe in the hollow body. The inflow pipe is provided with a large number of outflow holes whose diameters are gradually reduced from the top to the bottom due to gravity.

Effect of the Invention With the above-described configuration, the present invention reduces the amount of refrigerant flowing out into the outflow pipe on the gravitational lower side, where liquid refrigerant normally tends to flow due to the influence of gravity, and conversely reduces the amount of refrigerant flowing out to the upper side where liquid refrigerant does not easily flow. The amount of refrigerant flowing into the pipes can be increased, and as a result, a substantially equal amount of refrigerant can be divided and flowed out from all the outflow pipes.

Embodiments Hereinafter, refrigerant flow dividers according to embodiments of the present invention will be described with reference to the drawings.

1 and 2 show a refrigerant flow divider according to an embodiment of the present invention. In Figures 1 and 2, 1 is a refrigerant flow divider;
A cylindrical hollow body 2 whose longitudinal direction is vertical, an inflow pipe 3 inserted from the lower end 2L of the hollow body 2 to the vicinity of the upper end 2H,
It is composed of a plurality of flat outflow pipes 4 that are connected continuously at equal intervals in the vertical direction to the multi-circumferential side surface 2S of the hollow body 2, and the side surface of the inflow pipe 3 has a plurality of flat outflow pipes 4 that are connected downward due to gravity. Accordingly, an outflow hole 6 with a smaller diameter is provided. Note that the installation of the refrigerant flow divider 1 to the heat exchanger is the same as that of the conventional example, so a description thereof will be omitted.

Regarding the refrigerant flow divider configured as described above.

The operation will be explained below using FIG.

The refrigerant R for heat exchange flows from the inflow pipe 3 of the refrigerant flow divider 1 through the outflow hole 6 and flows into the hollow body 2 .

At this time, the refrigerant R, which is a gas-liquid two-phase flow, has a large liquid component in the outflow hole 6 which is downward due to gravity, and has a large gas component in the outflow hole 6 which is upward due to gravity. In this embodiment, the outflow holes 6 become smaller as they move downward due to gravity.
A large volume of refrigerant flows from the outlet hole 6 at the bottom.

Therefore, the amount of refrigerant in terms of weight related to heat exchange becomes uniform in each outlet hole 6, and as a result, the refrigerant H can be distributed almost equally to the entire outlet pipes 4 provided in a plurality of stages.

It consists of a plurality of flat outflow pipes 4 and an inflow pipe 3 inserted from the lower end 2L of the hollow body 2 to the vicinity of the upper end 2H. By making the lowered outflow hole 6 smaller, the refrigerant R flowing in from the inflow pipe 3 can be almost equally divided into the outflow pipe 4, and a heat exchanger (not shown) provided on the downstream side of the outflow pipe 4 can be used. ) can bring out their full potential.

In this embodiment, the inflow pipe is attached from the bottom to the top due to gravity, but the same effect can be obtained even if the direction is reversed.

Effects of the Invention The refrigerant flow divider of the present invention includes a hollow body, a plurality of outflow pipes sequentially attached in the longitudinal direction of the hollow body, and an inflow pipe inserted into the hollow body up to the end of the hollow body. , the inflow pipe is provided with a large number of outflow holes, and the diameter of the outflow holes is gradually reduced downward due to gravity, so that the refrigerant flowing from the inflow pipe is almost equally divided into a plurality of outflow pipes. It can flow out.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a schematic shape of a refrigerant flow divider according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. A cross-sectional view showing the condition,
FIG. 4 is a perspective view showing the general shape of a conventional refrigerant flow divider, FIG. 6 is a sectional view of FIG. It is. 1... Refrigerant flow divider, 2... Hollow body, pipe, 4... Outflow pipe, 6... Outflow hole.

Claims (1)

[Claims] It is composed of a hollow body, a plurality of outflow pipes attached sequentially in the longitudinal direction of the hollow body, and an inflow pipe inserted into the hollow body up to the end of the hollow body. A refrigerant flow divider with a large number of outflow holes that gradually become smaller from top to bottom.