JP2003050063A - Divider for heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a divider for a heat exchanger which can enhance the performance and the energy saving and prevent the dew condensation by providing the inflow port of a dividing pipe at the inlet of a heat exchanger with a joint pipe which separates a refrigerant in the state of two phases of gas and liquid into gas phase and liquid phase, and dividing the refrigerant equally, and suppressing the collapse of path balance. SOLUTION: In the divider for a heat exchanger where the dividing pipe 10 for diving the stream into at least two lines is connected through crosswise to the tip of the inflow pipe 12 which is equipped with a bend in the vicinity of the tip and where the refrigerant in the state of two phases of gas and liquid circulates, the joint pipe 14, which is equipped with a partition plate 13 for partitioning the interior of the pipe into at least two refrigerant passages, is provided between the outflow port 12a of the inflow pipe 12 and the inflow port 10a of the dividing pipe 10, and the partition plate 13 is so twisted as to partition the interior right and left on the inflow side 14a of the refrigerant and partition the interior above and below on the outflow side 14b of the refrigerant.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a flow dividing device for a heat exchanger of an air conditioner in which a refrigerant in a gas-liquid two-phase state flows.
Specifically, the present invention relates to a tubular body structure of a joint pipe which is provided at an inlet of a diversion pipe and can evenly divert a refrigerant.

[0002]

2. Description of the Related Art A heat exchanger 6 as shown in FIG. 5, for example, is used on the indoor unit side of a conventional air conditioner. The heat exchanger 6 has an upper heat exchanger 6a whose front surface is inclined forward of the air passage 4, and a rear heat exchanger 6b which is connected to an upper portion of the upper heat exchanger 6a and inclined rearward. The upper heat exchanger 6a is composed of a lower heat exchanger 6c which is connected to a lower portion of the upper heat exchanger 6a so as to stand substantially vertically. When the refrigerant passes through the heat exchanger 6, the cooling performance is deteriorated due to the pressure loss of the refrigerant. Therefore, two refrigerant flow paths (plural) are provided at the inlet of the heat exchanger 6.
It is divided into two to reduce pressure loss and improve performance.

That is, in the conventional heat exchanger 6, the inlet during the heating operation of the refrigerant is the central portion of the rear row of the upper heat exchanger 6a (the inlet during the cooling operation is the central portion of the front row), and the branch pipe 10 'is provided there. The refrigerant flowing in from the inflow pipe 12 'having the curved portion R'is vertically split, and the refrigerant flowing to the upper portion is rear heat exchanger 6b.
After making one round, the upper heat exchanger 6a is directed to the outlet located at the center of the front row, while the refrigerant flowing down from the diversion pipe 10 'makes one round in the lower heat exchanger 6c, and then the upper heat exchanger 6a. The refrigerant was circulated by forming a so-called two-system path in which the refrigerant was directed to another outlet located in the center of the front row of 6a.

However, when dividing the refrigerant flow passage into two,
It is difficult to divide the refrigerant evenly. As shown in FIG.
The flow dividing pipe 10 'is inclined and attached to the upper heat exchanger 6a. In order to make the diversion pipe 10 'vertical, it must be spliced with a joint or the like. However, in many cases, the flow dividing pipe 10 'is mounted at an angle due to a problem such as space. Therefore, gas-liquid 2
As shown in FIG. 6B, in the phase refrigerant AB, the vapor phase refrigerant A and the liquid phase refrigerant B are separated at the bent portion R ′ of the inflow pipe 12 ′, and enter the heat exchanger 6 as they are. That is, when the refrigerant flows through the curved portion R ′, due to centrifugal force, the heavy liquid-phase refrigerant B flows on the lower side, and a large amount of the liquid-phase refrigerant B flows on the lower path side, thereby impairing the path balance and increasing the cooling performance. There was a problem that it would decrease.

[0005]

The present invention has been made in view of the above problems, and is a joint for separating a refrigerant in a gas-liquid two-phase state into a gas phase and a liquid phase at an inlet of a flow dividing pipe at an inlet of a heat exchanger. It is an object of the present invention to provide a flow dividing device for a heat exchanger, which is provided with a pipe and which divides the refrigerant evenly to prevent the path balance from being disturbed to improve the performance, save energy, and prevent dew.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the tip of an inflow pipe having a bent portion near the tip and through which a refrigerant in a gas-liquid two-phase state flows, In a flow dividing device of a heat exchanger in which a flow dividing pipe that intersects with the flow dividing pipe and divides into at least two systems is connected, at least two refrigerants in the pipe are provided between the flow outlet of the inflow pipe and the flow inlet of the flow dividing pipe. A joint pipe having a partition plate for partitioning the passage is provided, and the partition plate is twisted so as to partition in the left and right directions on the refrigerant inlet side and vertically in the refrigerant outlet side with respect to the diversion direction of the diversion pipe. It is configured to be.

On the refrigerant outlet side, the joint pipe is divided into a vapor-phase refrigerant on the upper side and a liquid-phase refrigerant on the lower side, and is branched into the diversion pipe as a single-phase flow.

Further, the inside of the joint pipe is divided into two parts by the partition plate, and then the partition plate is twisted by twisting at least one side of the joint pipe.

Further, the joint pipe is constructed such that a partition plate whose both ends are twisted in advance is inserted into the pipe, and the partition plate is fixed to the inner wall of the pipe by welding.

A partition wall is provided at the inlet of the flow dividing pipe to partition the inlet in the vertical direction.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
~ It demonstrates based on FIG. FIG. 1 shows a pipe connection state of a heat exchanger of an indoor unit of an air conditioner, FIG. 2 is an enlarged perspective view of an essential part showing an embodiment of the present invention, and FIG. 2 (A) shows a joint pipe before connection. Fig. 2 (B) is an assembly diagram after connecting the joint pipe, Fig. 3 is a diagram for explaining the flow of the refrigerant according to the present invention, and Fig. 3
2A is a view as seen in the direction of arrow a in FIG. 2B, and FIG.
It is a b arrow figure of (B). In the figure, the heat exchanger 6 has an upper heat exchanger 6 whose front surface is inclined forward of the air passage 4.
a, a rear heat exchanger 6b connected to the upper part of the upper heat exchanger 6a and inclined rearward of the air passage 4, and a lower part of the upper heat exchanger exchanger 6a connected to each other to stand substantially vertically. The lower heat exchanger 6c is installed.

By the way, the heat exchanger 6 (6a, 6b, 6)
The wind speed passing through c) differs depending on the position, and variations in the wind speed affect the heat exchange of each part, and reduce the overall heat exchange amount. Therefore, in this heat exchanger 6, the refrigerant inlet (during heating operation) is defined as the central portion of the rear row of the upper heat exchanger 6a, the branch pipe 10 is provided there, and the gas-liquid two-phase provided with the curved portion R near the tip is provided. The refrigerant that flows in from the inflow pipe 12 (the discharge pipe of the compressor) in which the refrigerant in the state flows is vertically split, and the refrigerant that has flowed to the upper side makes a round in the rear heat exchanger 6b, and then the front row of the upper heat exchanger 6a. On the other hand, the refrigerant directed to the outlet located in the central portion, while flowing down from the flow dividing pipe 10 goes through the lower heat exchanger 6c once, and then to the other outlet located in the central portion in the front row of the upper heat exchanger 6a. In this configuration, the T-shaped pipe 11 is used to join the above-described refrigerant from the upper portion and return it to the compressor via a four-way valve (not shown).

Even so, if the split ratio of the refrigerant flowing through the upper and lower paths (refrigerant passages) is not good, the original capacity of the heat exchanger 6 cannot be fully obtained. Therefore, in the present embodiment, a joint pipe 14 having a partition plate 13 for partitioning the inside of the pipe into at least two refrigerant passages is provided between the outlet 12a of the inflow pipe 12 and the inlet 10a of the diversion pipe 10. The partition plate 13 has a twist of about 90 degrees so that it is partitioned in the left-right direction on the refrigerant inlet side 14a and in the vertical direction on the refrigerant outlet side 14b with respect to the diversion direction of the diversion pipe 10. ing.

In the above structure, the gas-liquid two-phase refrigerant AB flowing in from the inflow pipe 12 is a light gas-phase refrigerant in which the heavy liquid-phase refrigerant B flows under the inside of the pipe under the influence of centrifugal force at the bent portion R. A flows up. After that, the refrigerant flows into the joint pipe 14, and is separated into the gas-phase refrigerant A on the upper side of the partition plate 13 and the liquid-phase refrigerant A on the lower side at the refrigerant outlet side 14b, and each of them is divided into a single-phase flow and separately. The wall of the tube 10 is hit and the flow is evenly split. As a result, the refrigerant is evenly divided into the refrigerant passages that divide into at least two paths, the path balance is not lost, and the flow dividing device of the heat exchanger can improve performance, improve energy saving, and prevent dew condensation.

Further, as shown in FIG. 4 (A), the joint pipe 14 is divided into two parts by drawing both sides of the partition plate 13 into two parts, and then the pipe is twisted by about 90 degrees to form the joint pipe. The pipe 14 and the partition plate 13 are integrally formed, and the joint pipe 14 is easy to process and is advantageous in cost.

Further, as shown in FIG. 4 (B), the joint pipe 14 has a twisted relationship of about 90 at both ends in a hollow pipe.
It is also possible to insert the partition plate 13 that has been processed once and fix the partition plate 13 to the inner wall of the pipe by welding. Also, FIG.
As shown in (A), the inlet 10a of the flow dividing pipe 10
In addition, a partition wall 10b for partitioning the inflow port 10a in the vertical direction may be provided to communicate with the partition plate 13 of the joint pipe 14.

Although not shown, the joint pipe is divided into three stages in the vertical direction on the refrigerant outlet side by a partition plate, and depending on the weight of the refrigerant, the vapor phase refrigerant is in the upper stage, the gas-liquid two-phase refrigerant is in the middle stage, and the lower stage is in the lower stage. You may make it isolate | separate into a liquid-phase refrigerant | coolant and separately apply | coat each to a wall of a diversion pipe | tube by a single-phase flow, and evenly divide it.

As described above, the partition plate 1 for partitioning the inside of the pipe into at least two refrigerant passages is provided between the outlet 12a of the inflow pipe 12 and the inlet 10a of the diversion pipe 10.
3, the partition plate 13 divides the at least two refrigerant passages in the left-right direction on the refrigerant inlet side 14a with respect to the flow dividing direction of the flow dividing tube 10, and vertically on the refrigerant outlet side 14b. By having a twist of about 90 degrees so that it is partitioned into two directions, the refrigerant is evenly divided in the refrigerant passage that divides into at least two paths, and the path balance is not lost, improving performance and improving energy efficiency. And it becomes a flow dividing device of a heat exchanger capable of preventing dew condensation.

[0019]

As described above, according to the present invention, a partition plate for vertically separating a refrigerant in a gas-liquid two-phase state into a gas phase and a liquid phase is provided at the inlet of the flow dividing pipe at the inlet of the heat exchanger. Providing a joint pipe equipped with it, in the refrigerant passage that divides into at least two paths, the refrigerant is evenly divided to suppress the collapse of the path balance and improve performance,
It is a flow dividing device for heat exchangers that can improve energy efficiency and prevent dew condensation.

[Brief description of drawings]

FIG. 1 is a side view showing a pipe connection state of a heat exchanger according to the present invention.

FIG. 2 is an enlarged perspective view of an essential part showing an embodiment of the present invention,
(A) is a diagram before connecting the joint pipe, and (B) is an assembly diagram after connecting the joint pipe.

FIG. 3 is a diagram illustrating a flow of a refrigerant according to the present invention,
2A is a view as seen from an arrow a in FIG. 2B, and FIG.
FIG.

FIG. 4 is a perspective view showing a method of processing a joint pipe and a partition plate according to the present invention, (A) being a first example and (B) being a second example.

FIG. 5 is a side view of a heat exchanger showing a conventional example.

6A and 6B show a schematic configuration of a conventional flow dividing pipe for a heat exchanger, in which FIG. 6A is a perspective view and FIG. 6B is a diagram illustrating a flow of a refrigerant.

[Explanation of symbols]

6 heat exchanger 6a Upper heat exchanger 6b Rear heat exchanger 6c Lower heat exchanger 10 branch pipe 10a Inlet 11 T-tube 12 Inflow pipe 12a Outlet 13 partition boards 14 Joint pipe 14a Refrigerant inlet side 14b Refrigerant outlet side AB gas-liquid two-phase refrigerant A Gas phase refrigerant B liquid phase refrigerant

Claims (5)

[Claims] 1. A heat exchanger having a tip end of an inflow pipe having a bent portion near the tip and through which a refrigerant in a gas-liquid two-phase state flows, and a diversion pipe that intersects the inflow pipe and diverts into at least two systems are connected in communication. In the flow dividing device, between the outlet of the inflow pipe and the inlet of the flow dividing pipe,
A joint pipe having a partition plate for partitioning the inside of the pipe into at least two refrigerant passages is provided, and the partition plate partitions the refrigerant flow inlet side in the horizontal direction and the refrigerant flow outlet side in the vertical direction with respect to the flow dividing direction of the flow dividing pipe. A shunt device for a heat exchanger, which is twisted so as to be divided into two parts. 2. The joint pipe is divided into a gas-phase refrigerant on the upper side and a liquid-phase refrigerant on the lower side on the refrigerant outlet side, and is branched into the diversion pipe as a single-phase flow. 1. The flow dividing device of the heat exchanger according to 1. 3. The inside of the joint pipe is divided into two by the partition plate.
The flow dividing device for a heat exchanger according to claim 1, wherein the partition plate is twisted by dividing and then twisting at least one side of the joint pipe. 4. The heat exchange according to claim 1, wherein the joint pipe is formed by inserting a partition plate whose both ends are twisted in advance into the pipe and fixing the partition plate to the inner wall of the pipe by welding. Flow diversion device. 5. The flow dividing device for a heat exchanger according to claim 1, wherein the flow inlet of the flow dividing pipe is provided with a partition wall for partitioning the flow inlet vertically.