JPH03260566A - Two-phase fluid distributor for gas and liquid - Google Patents

Abstract

PURPOSE:To equalize the flow rate of a liquid-phase fluid flowing out and to dispense with a rotary vane by providing a plurality of erected slender pipes for distribution of flow of which the inside diameters are increased sequentially from the one on the downstream side to the one on the upstream side and by making thereby uniform the flow rate of the liquid flowing out of each slender pipe. CONSTITUTION:The inside diameters of four slender pipes are made larger toward the downstream side so as to reduce a flow passage resistance, and thereby a liquid-phase fluid of a two-phase fluid of gas and liquid is distributed uniformly. Another construction may also be adopted wherein the diameters of outflow holes 2a provided in the places of connection of the slender pipes 2 with a distribution pipe 1 respectively are made larger toward the downstream side so as to reduce the flow passage resistance and to equalize the flow rate of the liquid flowing out of each of the slender pipes 2, although all the four slender pipes 2 are made to have the same inside diameter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a gas-liquid two-phase fluid distributor that evenly distributes a liquid refrigerant to an evaporator constituting a refrigeration cycle, for example.

[Prior Art] Fig. 4 is a vertical sectional view of this type of distributor disclosed in Japanese Patent Application Laid-Open No. 63-220054, and in the figure (1) is a distribution pipe through which a gas-liquid two-phase fluid passes. , (2) is a plurality of diversion thin tubes with the same inner diameter planted in this distribution pipe, (3
) is a rotary blade that is installed on the inlet side of the distribution pipe (1) and stirs the flowing gas-liquid two-phase fluid (4) by its flow.

In other words, the gas-liquid two-phase fluid (4) supplied into the distribution pipe (1)
) is stirred by the rotary blade (3) to give a swirling component, resulting in a gas-liquid mixture that flows evenly into each of the dividing tubes (2).

[Problems to be Solved by the Invention] Since the conventional gas-liquid two-phase fluid distributor is configured as described above, it is necessary to provide a rotor blade in the one-way pipe, which causes an increase in cost. was.

This invention has been made to solve the above-mentioned problems, and its purpose is to equalize the flow rate of liquid flowing out from each capillary without using the rotor blades as described above.

[Means for Solving the Problems] In the gas-liquid two-phase fluid distributor according to the present invention, the flow path resistance of a plurality of thin flow dividing tubes installed in a distribution pipe is changed.

[Function] In the gas-liquid two-phase fluid distributor according to the present invention, the flow path resistance of each set of dividing pipes gradually decreases from the downstream side to the upstream side, so that The flow rate of the effluent becomes equal.

[Example] An example of the present invention will be described below. That is, in FIG. 1, (1) is a distribution pipe into which gas-liquid two-phase fluid flows;
(2> is a plurality of thin flow dividing tubes branched in a vertical line from this distribution pipe, (1a) is the inner chamber of the distribution pipe (1), and (4) is the gas/liquid supplied to the above distribution pipe (1). two-phase fluid, (4a)
(4b) indicates the gas phase, (4b) indicates the liquid phase, and solid arrows indicate the flow of the gas phase fluid.

Moreover, FIG. 2 is an enlarged sectional view taken along the line -■ of FIG. 1.

D is the inner diameter of the distribution pipe (1), d is the inner diameter of the capillary (2), and θ is the angle between the center of the distribution pipe (1) and the inner diameter of the root of the capillary (2).

In other words, the gas-liquid two-phase fluid (4) that has flowed into the distribution pipe (1)
, (gas phase (4a) and liquid phase (4b)) rises on the inner peripheral surface as an annular flow with a substantially uniform liquid film thickness. Therefore, the liquid film passing through the inlet of each capillary (2)
). The flow rate of liquid flowing into each capillary is expressed by the following equation based on the relationship between the distribution pipe (1) and each capillary (2).

Here, G is the flow rate of the effluent from the capillary, Giu is the flow rate of the inflow, D is the inner diameter of the distribution pipe, d is the inner diameter of the capillary, and θ is the above angle.

Therefore, if the inner diameter of the distribution pipe is uniform and the inner diameters d of the plurality of thin tubes are all the same, the flow rate of the inflow to the downstream thin tube will be small, and the flow rate of the liquid flowing out from it will also be reduced.

Therefore, in the embodiment shown in Fig. 1, the inner diameter of the four thin tubes is increased to the smaller tube on the downstream side to reduce the flow path resistance, thereby uniformly distributing the liquid phase fluid of the gas-liquid two-phase fluid. It is something that exists.

In the above embodiment, the inner diameter of each thin tube is made larger toward the downstream side, but as shown in another embodiment in FIG. 3, all four thin tubes (2) have the same inner diameter. However, the diameter of the outflow hole (2a) provided at the connection point between each thin tube (2) and the distribution pipe (1) is made larger toward the downstream side to reduce flow resistance, and each thin tube (2) The flow rate of the effluent may be made equal.

In the above embodiment, a distributor that distributes a gas-liquid two-phase fluid into four parts has been described, but the present invention is not limited to this. Furthermore, in the above embodiment, the interval between the attachments of each thin tube is not mentioned, but the interval between the attachment of each thin tube is 2 of the inner diameter d of the thin tube.
By increasing the size by at least twice as much as possible, the flow rate of the effluent can be made even more uniform.

[Effects of the Invention] Since the gas-liquid two-phase fluid distributor of the present invention is configured as described above, the gas-liquid two-phase fluid distributor in which the flow rate of the liquid phase fluid flowing out from each capillary is equal, This has the advantage of being achieved without the need for conventional rotors.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a gas-liquid two-phase fluid distributor of the present invention, FIG. , FIG. 4 is a vertical cross-sectional view of a conventional gas-liquid two-phase fluid distributor. In the figure, (1) is a distribution pipe, (2) is a thin tube, and (4) is a gas-liquid two-phase fluid. 3rd figure 0~

Claims (1)

[Claims] A plurality of thin tubes for dividing flow, each of which gradually reduces the flow resistance from the downstream side to the upstream side, is installed in the distribution pipe that carries the gas-liquid two-phase fluid inside, and the flow from each thin tube is A gas-liquid two-phase fluid distributor characterized in that the flow rate of the effluent is made uniform.