JPH08247581A - Distributor - Google Patents

Abstract

PURPOSE: To easily control the refrigerant distributing amount of a distributor by forming the both ends of the distributor as outlet side tubes, providing an inlet side tube substantially at the center of the outlet side tube, and inserting a pipe having a small diameter to the end of the outlet side tube in the distributor for partly dividing a refrigerant circuit into a plurality. CONSTITUTION: The inner diameter of an inlet side tube 62 provided at the center of a distributor 61 is formed equal to or larger than those of outlet side tubes 64a, 64b of both ends, and the inner diameter of a pipe inserted to one of the tubes 64a, 64b is reduced thinner than that d3 of the outlet side tube 64a. Thus, the flow of refrigerant fed to the distributor 61 via a refrigerant tube 66 is made scarcely changed in the gravity direction from the part of the tube 52, and the adherence of the flow to the inner wall 65 of the branch scarcely occurs so that the refrigerant can be freely distributed. Thus, the distribution refrigerant ratio to the tubes 64a, 64b is stably maintained despite the circulation amount, the dryness and the path configuration change of the refrigerant according to the size of the inner diameter of the pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow divider for partially making a plurality of refrigerant circuits for refrigerating and refrigerating equipment and air conditioners.

[0002]

2. Description of the Related Art In recent years, with the demand for higher efficiency of equipment, higher efficiency of heat exchangers has been further advanced. As one of the streams for improving the efficiency of the heat exchanger, the diameter of the refrigerant pipe has been reduced, and along with this, the refrigerant flow divider has come to be widely used. Among them, a three-way bend tubular flow divider which is compact as a refrigerant flow divider and can be used as a part of piping of a heat exchanger is often used in combination with its low cost.

As one example thereof, as disclosed in Japanese Patent Application Laid-Open No. 2-71063, there is one in which the inner diameter of the inflow side pipe portion of the flow diverter is varied to make the diverter flow uniform.

[0004]

The above-mentioned prior art is devised to evenly divide the refrigerant in the flow divider, and suppresses fluctuations due to different cycle conditions and variations in the shape of the flow divider. However, controlling the refrigerant flow rate was not considered.

An object of the present invention is to control the refrigerant flow rate by inserting a pipe. Further, it is to suppress the fluctuation due to the difference in the cycle condition and the shape variation.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a pipe is inserted in the upper or lower part of the outlet side pipe of a flow distributor, and the inner diameter of the insertion pipe is adjusted.

[0007]

The operation of the above means is as follows.

In order to control the refrigerant flow rate,
It can be controlled by inserting a pipe into the upper part or the lower part of the outflow side pipe of the flow distributor and adjusting the inner diameter of the insertion pipe.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First, FIGS. 1 and 2 show a flow diverter according to a first embodiment of the present invention. FIG. 1 is a front view and FIG. 2 is a plan view. In the figure, 61 is a flow divider, 62 is an inflow side pipe portion, 63 is a pipe end of the inflow side pipe portion 62, 64a and 64b are outflow side pipe portions, and the inner diameter of the inflow side pipe portion 62 is the outflow side pipe portion 64.
A pipe having a diameter equal to or larger than the inner diameters of a and 64b and having a diameter smaller than the inner diameter of the outflow side pipe portion is inserted into either one of the outflow side pipe portions 64a and 64b.

Regarding the shunt configured as described above,
The operation will be described below with reference to FIG. FIG. 7 shows the flow of the refrigerant in the flow divider 61 according to the first embodiment of the present invention. The figure shows a simulated development of the cross section of the flow path. Reference numerals 61 to 64a and 64b correspond to FIGS. Reference numeral 65 is an inner wall of the branch portion, 66 is a refrigerant pipe forming a heat exchanger, 67 is a brazing material joining the refrigerant pipe 66 and the flow divider 61, 68 is a liquid phase portion of the refrigerant, and 69 is a vapor phase portion of the refrigerant. , D1, d2, d3 are inner diameters of the inflow-side pipe portion 62, the inflow-side pipe portion 62, and the outflow-side pipe portions 64a, 64b, respectively, and the inner diameter d1, the inner diameter d2, and the inner diameter d3 are equal. Refrigerant pipe 6
The flow of the refrigerant that has separated into the gas-liquid two phases that has flowed into the flow divider 61 through 6 is smaller in the inside diameter of the pipe inserted in the outflow side pipe portion 64b than the inside diameter d3 of the outflow side pipe portion 64a. The flow of gas and liquid that has flowed in from the portion of the pipe portion 62 is unlikely to change in the direction of gravity, and the flow is less likely to adhere to the inner wall 65 of the branch portion, so that the refrigerant can be freely split.

As described above, according to the present embodiment, even if the amount of circulation of the refrigerant, the degree of dryness, and the path configuration change depending on the size of the inner diameter of the pipe inserted into the pipe end of the outflow side pipe portion 64b. Refrigerant distribution ratio (mass ratio) to the outflow side pipes 64a, 64b
It freely splits and stabilizes.

A flow divider according to a second embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a front view and FIG. 4 is a plan view. In the figure, 70 is a flow divider, 71 is an inflow side pipe portion, 72 is a pipe end of the inflow side pipe portion 71, 73a and 73b are outflow side pipe portions, and the inflow side pipe portion 71 and the inflow side pipe portion 71 are pipe ends 72. Has a substantially straight shape and is connected to the outflow side pipe portions 73a and 73b. Inflow side pipe section 7
The inner diameter of 1 is equal to the inner diameter of the outflow side tube portions 73a and 73b.

The operation of the flow shunt configured as described above will be described below.

The centrifugal force (indicated by f in FIG. 1) acting on the refrigerant flowing in the flow distributor 61 of the first embodiment of the present invention shown in FIG. 1 does not act on the refrigerant flowing in the flow distributor 70. . As for the flow of the refrigerant separated into the gas-liquid two phases, since the inner diameter of the pipe inserted in the outflow side pipe portion 73b is smaller than the inner diameter of the outflow side pipe portion 73a, the flow of the gas and liquid flowing in from the portion of the inflow side pipe portion 71. However, it is difficult for the flow to adhere to the inner wall of the branch,
The refrigerant can be freely branched into the outflow side pipe portions 73a and 73b.

According to the present embodiment, the outflow side tube portion 73 is changed even if the circulation amount, the dryness, or the path configuration of the refrigerant changes depending on the inner diameter of the pipe inserted into the tube end of the outflow side tube portion 73b.
The refrigerant distribution ratio (mass ratio) to a and 73b is more freely divided and stabilized.

A flow divider according to a third embodiment of the present invention will be described below with reference to the drawings.

FIG. 5 is a front view and FIG. 6 is a plan view. In the figure, 74 is a flow divider, 75 is an inflow side pipe part, 76 is a pipe end of the inflow side pipe part 75, 77a and 77b are outflow side pipe parts, and the inner diameter of the inflow side pipe part 75 is the outflow side pipe parts 77a and 77b. And the inner diameter of the tube end 76 of the inflow side tube portion 75.

With respect to the flow divider configured as described above,
The operation will be described below with reference to FIG. FIG. 8 shows the flow of the refrigerant in the flow divider 74 in the third embodiment of the present invention. The figure shows a simulated development of the cross section of the flow path. 74 to 77a and 77b correspond to FIG. 5 and FIG. Reference numeral 78 is an inner wall of the branch portion, 79 is a refrigerant pipe forming a heat exchanger, 80 is a brazing material joining the refrigerant pipe 79 and the flow divider 74, 81 is a liquid phase portion of the refrigerant, and 82 is a vapor phase portion of the refrigerant. , D4, d5, d6 are the inner diameters of the pipe end 76, the inflow side pipe 75, and the outflow side pipes 77a, 77b of the inflow side pipe 75, and the inner diameter d4, the inner diameter d5, and the inner diameter d6 are equal. Since the flow of the refrigerant that has separated into the gas-liquid two phases that has flowed into the flow divider 74 through the refrigerant pipe 79 is smaller in the inner diameter of the pipe inserted in the outflow side tube portion 77b than the inner diameter d6 of the outflow side tube portion 77a. Since the flow of gas and liquid that has flowed in from the portion of the inflow side pipe portion 75 is less likely to change in the direction of gravity and the flow is less likely to adhere to the inner wall 78 of the branch portion, the refrigerant flows out of the inflow side pipe portion 77.
Can be freely branched to a and 77b.

According to the present embodiment, the outflow side tube portion 77 is changed even if the amount of circulation of the refrigerant, the dryness, and the path configuration are changed depending on the inner diameter of the pipe inserted into the tube end of the outflow side tube portion 77b.
The refrigerant distribution ratio (mass ratio) to a and 77b is freely separated and stabilized. Also, in the step of forming the flow distributor, it becomes easy to form the substantially T-shaped tube.

[0021]

The amount of refrigerant flowing out can be freely controlled by inserting a pipe in the upper part or the lower part of the outflow side pipe of the flow divider and controlling the inner diameters of the upper and lower outflow side pipes.

[Brief description of drawings]

FIG. 1 is a front view of a flow divider according to a first embodiment.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view of a flow divider according to a second embodiment.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a front view of a flow divider according to a third embodiment.

FIG. 6 is a plan view of FIG.

FIG. 7 is a cross-sectional view showing a state of the refrigerant flowing inside the flow divider in the first embodiment.

FIG. 8 is a cross-sectional view showing a state of the refrigerant flowing inside the flow divider in the third embodiment.

FIG. 9 is a perspective view of a conventional flow divider.

FIG. 10 is a front view of a part of a heat exchanger to which a conventional flow divider is attached.

11 is a right side view of FIG.

FIG. 12 is a perspective view of another conventional shunt.

FIG. 13 is a front view of a portion of a heat exchanger to which a conventional flow divider is attached.

FIG. 14 is a side view of FIG. 13;

FIG. 15 is an explanatory diagram of a state of a refrigerant flowing inside a conventional flow divider.

[Explanation of symbols]

62, 71, 75 ... Inflow side pipe part, 63, 72, 76 ... Pipe end, 64a, 64b, 73a, 73b, 77a, 77b ... Outflow side pipe part, d1, d2, d3, d4 ... Inner diameter.

Claims (1)

[Claims] 1. An air conditioner including a heat exchanger, wherein both ends of a flow diverter are used as outflow side pipe parts and are extruded integrally from a substantially central part of the outflow side pipe, and a pipe is provided at an end of the outflow side pipe. Thus, the flow distributor is characterized by being constituted by an outflow side pipe portion having a reduced inner diameter.