JP2820428B2 - Refrigerant flow divider - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant flow divider for uniformly dividing a refrigerant in a refrigeration cycle of an air conditioner, a refrigerating device, or the like.

2. Description of the Related Art In recent years, in order to cope with multiple circuits due to the multiplication of a refrigeration system and the thinning of heat transfer tubes of a heat exchanger,
Refrigerant flow dividers have been diversified and their importance has increased. In particular, among the refrigerant distributors, a cylindrical refrigerant distributor is frequently used because it can be compactly mounted on the side surface of the heat exchanger and is low in cost. FIG. 4 shows a conventional cylindrical refrigerant distributor, and FIG. 5 shows a state in which the refrigerant distributor is attached to a heat exchanger. In FIG. 4, the refrigerant flow divider 10 has a lower end portion 11L of a flow distributor main pipe 11 which is a cylindrical hollow body having an upper end closed, and a refrigerant having a smaller outer diameter than the flow distributor main pipe 11 flows in Along with connecting the pipe 12 with brazing, a plurality of pipes projecting slightly from the inner peripheral surface through the outer peripheral side surface 11S continuously and at regular intervals in the longitudinal direction of the flow distributor main pipe 11 and at equal intervals. A flat outflow pipe 13 for discharging the refrigerant is connected by brazing.

Next, the structure of the heat exchanger attached and assembled will be described with reference to FIG. The heat exchanger 7 has a refrigerant distributor 10 disposed on a side surface thereof, and a plurality of refrigerant pipes 8 having the same shape as the outlet pipe 13 and being parallel to the outlet pipe 13 connected to the distributor main pipe 11 in the horizontal direction, respectively. Connected. On the side opposite to the side on which the refrigerant flow divider 10 is disposed, almost the same components as those of the refrigerant flow divider 10 are connected, and the refrigerant flowing through the refrigerant pipe 8 is collected again.

Fins 9 are vertically bonded at regular intervals between the refrigerant tubes 8 arranged in parallel so as to exchange heat well with the passing air.

Next, the operation of the refrigerant flow divider configured as described above will be described.

The refrigerant R flowing through the heat exchanger 1 is supplied to an inlet pipe of the refrigerant distributor 10.
After flowing into the diverter main pipe 11 from 12, the direction is changed at right angles in the diverter main pipe 11 as shown by arrows, and flows into the plurality of outflow pipes 13 connected through the outer peripheral side surface 11S respectively. Then, it flows into the refrigerant pipe 8 of the heat exchanger 7.

However, in the configuration as described above, since there are many outflow pipes 13 for one inflow pipe 12 connected to the lower end 11L of the flow distributor main pipe 11, the refrigerant flow rate flowing out of the plurality of outflow pipes 13 Tends to be uneven. This is because the refrigerant R flowing into the main pipe 11 changes its flow in the right angle direction and flows, and the expansion valve (not shown)
In the case of the refrigerant R in which the gas that has passed through and evaporated is mixed, the refrigerant flowing from the lower end 11L of the flow splitter main pipe 11 is affected by the gravity G, and the light gas portion flows more upward. The refrigerant amount (Kg / H) expressed by weight decreases as the pipe 13H becomes smaller. Therefore, there has been a problem that the heat exchange amount is reduced due to the uneven branch flow as described above.

In order to solve such a problem, an object of the present invention is to provide a refrigerant flow divider that improves the heat exchange amount of a heat exchanger by making the refrigerant flow rate uniform.

Means for Solving the Problems In order to solve this problem, the present invention provides a vertically long hollow flow divider main pipe, and a partition for dividing the inside of the flow divider main pipe into a plurality of vertically adjacent spaces. A plurality of plates, a plurality of which are arranged in the longitudinal direction of the flow distributor main pipe, penetrate the peripheral surface of the flow distributor main pipe perpendicular to the longitudinal direction of the flow distributor main pipe, and A plurality of outflow pipes connected and connected to each other, and a plurality of branch pipes connected and connected to the main flow distributor so as to branch from an inflow pipe into which a refrigerant flows and flow into respective lower portions of the plurality of spaces. We have it.

Operation With the above-described configuration, the refrigerant flowing from the inflow pipe is separated by the branch pipe, enters the flow splitter main pipe, and flows into the outflow pipe partitioned and divided for each branch pipe. Accordingly, since the gas-liquid mixed refrigerant which is affected by gravity is dispersed in the outlet pipe since the branch pipe is partitioned and divided, the unevenness due to the branch flow is greatly reduced.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a refrigerant distributor 1 is branched from a lower inflow pipe 4 into a hollow hollow cylindrical distributor 2 having a closed upper end in order to divert an inflowing refrigerant.
The branch pipes 3L and 3H having a smaller outer diameter than the branch pipe main pipe 2 are connected to the outer peripheral side face 2S of the lower part and the middle part of the branch pipe, and the branch pipe 3H connected to the middle part is opposite to the branch pipe 3H. Tube 2
A plurality of flat outflow pipes 5 are continuously connected at regular intervals from the lower side to the upper side at equal intervals, projecting from the outer peripheral side surface 2S to the inner peripheral surface portion, and are connected by brazing.

In addition, a branch pipe connected to a lower portion of the main pipe 2 is used to equalize the flow rate (per weight) of the refrigerant.
Inflow from 3L and branch pipe 3H connected to the center, and outflow pipes 5H and 5H
A partition plate 6 is disposed and fixed inside the intermediate portion so that the refrigerant R flows separately from each other.

Therefore, the main branch 2 is divided into an upper main branch 2H corresponding to the branch pipe 3H and the outlet pipe 5H, and a lower main section 2L corresponding to the branch pipe 3L and the outlet pipe 5L.

FIG. 2 is a view showing a structure in which the refrigerant flow divider 1 is assembled using the heat exchanger 7.

In FIG. 2, the refrigerant distributor 1 of the present invention is mounted on the left side of the heat exchanger 7, and the outlet pipe 5 connected to the main pipe 2 has a plurality of outlet pipes 5 having the same shape as the outlet pipe 5. The refrigerant pipes 8 are connected in parallel in the horizontal direction.

Components similar to those described in the conventional example are connected to the side surface on the opposite side where the refrigerant flow divider 2 is disposed, and the refrigerant flowing through the refrigerant pipe 8 is collected.

Further, the fins 9 bonded between the refrigerant tubes 8 arranged in parallel are the same as in the conventional example, and the description is omitted.

Next, the operation of the above configuration will be described. When the refrigerant distributor is used for a refrigerator, the refrigerant R flowing into the heat exchanger 7 first flows into the inflow pipe 4 of the refrigerant distributor 1 as shown by the arrow, and the upper branch pipe. Refrigerant _RH flows through 3H, and refrigerant _RL flows through branch pipe 3L on the lower side. The refrigerant _{RH that} has passed through the upper branch pipe 3H flows into the upper flow divider main pipe 2H, and then is split into multiple outlet pipes 5H and flows out.

Similarly, the refrigerant _{RL that} has passed through the lower branch pipe 3L flows into the lower flow divider main pipe 2L, and then flows into the plurality of outflow pipes 5L to flow out.

As described above, the refrigerant flow divider according to the present embodiment includes a hollow flow divider main pipe 2 that is long in the vertical direction, and a partition plate 6 that divides the inside of the flow divider main pipe 2 into a plurality of vertically adjacent spaces. A plurality of the shunt main pipes 2 are arranged in the longitudinal direction of the shunt main pipe 2, penetrate the peripheral surface of the shunt main pipe 2 perpendicularly to the longitudinal direction of the shunt main pipe 2, and are connected and connected to each of the plurality of spaces of the shunt main pipe 2. Outflow pipes 5
And a plurality of branch pipes 3L and 3H connected to and connected to the main branch 2 so as to branch from the inflow pipe 4 into which the refrigerant flows and to flow into respective lower portions of the plurality of spaces. In the structure (1), the refrigerant R flowing from the inflow pipe 4 through the inflow pipe 4 through the branch pipes 3H and 3L is first separated from the flow from the inflow pipe 12 to the plurality of outflow pipes 13 via the flow splitter main pipe 11. Each refrigerant R _H , R _L is divided into two by a partition plate 6, and the distance from the branch pipes 3 H, 3 L to the farthest outflow pipe is reduced by half and shortened, and the flow divider main pipes 2 H, 2 are shortened.
The refrigerant R is introduced into the L and divided into two outflow pipes 5H and 5L whose number per branch pipe is reduced by half, so that the flow of the refrigerant R due to the gas-liquid mixing is caused by the action of gravity (the bubbles flow upward because the bubbles are light). Uneven flow is reduced. Branch pipe 3H,
By arranging the 3L at the lower part, the liquid refrigerant easily accumulates at the lower part, especially when the circulation amount of the refrigerant R is small, but the distance to the farthest outflow pipe is reduced by half, the effect of preventing it by shortening, and This has the effect of agitating and rising the introduced refrigerant with the refrigerant flowing from the branch pipe and uniformly flowing into the outflow pipe.

As a result, the refrigerant R flowing through the refrigerant pipes 8 of the heat exchanger 7 via the plurality of outflow pipes 5 is almost equally diverted, and the amount of heat exchange in the heat exchanger 7 is improved and improved.

In this embodiment, the lower branch pipe 3L is connected to the lowermost end of the flow splitter main pipe 2, but other embodiments will be described with reference to FIG.
As shown in the cross-sectional view of 1a, as in the case of the branch pipe 30H in which the lower end of the flow splitter main pipe 20 is closed and connected to the intermediate portion, the flow splitter main pipe 2
The connection may be made through the lower outer peripheral surface 20S perpendicularly to the longitudinal direction of 0.

In the present embodiment, two branch pipes 3H and 3L, that is, one partition plate 6 has been described. However, the number of branch pipes and partition plates is increased by the circulation amount of the refrigerant R and the number of outlet pipes 5. It goes without saying that an even diversion is achieved.

In addition, in this embodiment, the refrigerant flow divider 1 is attached to the heat exchanger 7 by connecting the outflow pipe 5 and the refrigerant pipe 8, but the refrigerant pipe 8 is directly connected to the flow splitter main pipe 2 and the outflow pipe 5 is connected. May be formed.

Advantageous Effects of the Invention As described above, the refrigerant flow divider of the present invention includes a vertically long hollow flow divider main pipe, a partition plate that divides the inside of the main flow pipe into a plurality of vertically adjacent spaces, A plurality of pipes are arranged in the longitudinal direction of the main pipe, penetrated through the peripheral surface of the main pipe of the flow distributor perpendicularly to the longitudinal direction of the main pipe, and connected and connected to each of the plurality of spaces of the main pipe of the flow distributor. A plurality of outflow pipes, and a plurality of branch pipes connected to and connected to the main distributor so as to flow from the inflow pipe into which the refrigerant flows and flow into the lower portion of each of the plurality of spaces,
The refrigerant flowing from the inflow pipe into the main pipe of the flow divider flows through the pipe with a small difference in height, so that the refrigerant can be almost equally split and flow out to the outflow pipe. Can be improved and improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cross section of a main part of a refrigerant flow divider according to an embodiment of the present invention, FIG. 2 is a view showing a state where the refrigerant flow divider is attached to a heat exchanger, and FIG. 3 is another embodiment of the present invention. , FIG. 4 is a perspective view of a principal part of a conventional refrigerant distributor, and FIG. 5 is a view showing a state where the conventional refrigerant distributor is attached to a heat exchanger. 1… refrigerant splitter 2… splitter main pipe, 2H… upper splitter main pipe, 2L… lower splitter main pipe, 3H… upper branch pipe, 3L… lower branch pipe 4, inflow pipe, 5 outflow pipe, 5H upper outflow pipe, 5L lower outflow pipe, 6
Partition plate.

Continued on the front page (72) Inventor Osamu Aoyagi 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Nagao 3-22 Takaidahondori, Higashi Osaka City, Osaka Matsushita Refrigerator (72) Inventor Hiroaki Kase 3--22, Takaidahondori, Higashi-Osaka-shi, Osaka, Matsushita Refrigeration Machinery Co., Ltd. (56) References Japanese Utility Model Showa 54-38956 (JP, U)

Claims (1)

(57) [Claims] 1. A main flow pipe having a hollow shape that is long in the vertical direction, a partition plate that divides the inside of the main flow path into a plurality of vertically adjacent spaces, and a plurality of the flow dividers are arranged in the longitudinal direction of the main flow splitter. A plurality of outflow pipes that are connected to and communicate with each of the plurality of spaces in the main body of the flow splitter through the peripheral surface of the main flow splitter perpendicular to the longitudinal direction of the main flow splitter, A plurality of branch pipes connected to the main flow distributor so as to flow into respective lower portions of the space divided from the inflow pipe on the inlet side into which the inflow flows, and an outlet of the plurality of outflow pipes; A refrigerant flow divider with one side.