JPH06337183A - Flow dividing device for refrigerant - Google Patents

Abstract

PURPOSE:To provide a flow dividing device capable of distributing refrigerant into a plurality of distributing pipes evenly without,making any variety in gas and liquid condition. CONSTITUTION:The flow dividing device 1 of refrigerant, which distributes refrigerant, introduced from an introducing pipe 11, into a plurality of distributing pipes 5, is provided with an introducing unit 13, to which the introducing pipe 11 is connected, a cylindrical unit 14, having a diameter larger than the dimeter of the introducing unit 13, an injecting unit 15, having a diameter smaller than the diameter of the cylindrical unit 14, and a mixing wall 4a, mixing refrigerant by colliding the refrigerant injected out of the injection unit 15 thereagainst. The refrigerant, introduced from the introducing pipe 11, is diffused in the cylindrical unit 14, then, the refrigerant is injected by the injecting unit 15, having a small diameter, while the injected refrigerant is collided against the mixing wall 11a and liquid refrigerant is mixed with gas refrigerant sufficiently, then, the refrigerant is distributed into the distributing pipes under almost equal gas and liquid condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant flow divider, particularly in a refrigeration cycle used in an air conditioner or the like, for distributing the refrigerant to a plurality of distribution pipes arranged in a heat exchanger (evaporator). Refrigerant flow divider.

[0002]

2. Description of the Related Art Generally, in a refrigerating cycle of an air conditioner, a plurality of distribution pipes (refrigerant pipes) are incorporated in a heat exchanger. It is connected to each of the refrigerant pipes through, and distributes the refrigerant introduced by the introduction pipe to each of the refrigerant pipes.

As such conventional shunts, those disclosed in Japanese Examined Patent Publication No. 60-42855 and Japanese Utility Model Publication No. 1-29493 are known. The flow dividers disclosed in these publications are
As shown in the sectional views of FIGS. 4 and 5, the introduction pipe 2
1 is connected to the flow distributor main body 23, and a plurality of distribution pipes 25 are connected to the position facing the introduction pipe 21, and the refrigerant introduced from the introduction pipe 21 is directly distributed to the distribution pipe 25. It is designed to be supplied.

[0004]

However, since the refrigerant supplied from the introduction pipe is in a state where liquid and gas are mixed and the specific gravities of the liquid and gas are different, the refrigerant supplied to the flow divider is Liquid and gas are separated or mixed in a biased manner. For example, the distribution pipe located above has a small amount of liquid and a large amount of gas, so that the refrigerant is uneven in gas-liquid state (state in which liquid and gas are mixed). Occurs, and the refrigerant cannot be distributed to the distribution pipe in a uniform gas-liquid state.

When the gas-liquid state of the refrigerant supplied to the distribution pipe becomes uneven in this way, the efficiency of heat exchange in the heat exchanger decreases.

Therefore, an object of the present invention is to provide a flow distributor which can evenly distribute a refrigerant to a plurality of distribution pipes without unevenness in a gas-liquid state.

[0007]

In order to achieve the above object, the present invention is a refrigerant flow distributor for distributing a refrigerant introduced from an introduction pipe to a plurality of distribution pipes, wherein the introduction pipe is connected. The introduction portion, the body portion having a larger diameter than the introduction portion, the ejection portion having a smaller diameter than the body portion, and the ejection portion, which are provided to face the ejection portion, collide with the refrigerant flowing out from the ejection portion to remove the refrigerant. And a mixing wall.

[0008]

In the refrigerant flow divider of the present invention, the refrigerant introduced from the introduction pipe is diffused in the barrel portion, and then the jet portion having a small diameter accelerates the flow velocity of the refrigerant and is ejected. The ejected refrigerant collides with the mixing wall, the liquid refrigerant and the gas refrigerant are sufficiently mixed here, and then the mixed refrigerant is distributed to the distribution pipe in a substantially liquid-vapor state.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In the refrigerant circuit of the air conditioner, the heat exchanger 3 is formed with a plurality of cooling passages, and as shown in FIG. In this embodiment, a total of 12 cooling passages are formed in the heat exchanger.
Two distribution pipes 5 are provided. Then, the refrigerant is introduced from the refrigerant pipe 7 constituting the refrigeration cycle into the flow divider 1 via the electromagnetic valve 9 and the introduction pipe 11, and then divided into each distribution pipe 5.

The flow distributor 1 is generally composed of a main body 2 and a distributor 4, as shown in FIG.
An inlet pipe 11 is connected to 3 and the above-mentioned 12 is connected to the distributor 4.
Book distribution pipe 5 is connected.

A strainer 16 for removing impurities in the refrigerant is inserted into the body portion 14 of the main body 2, and the diameter of the body portion 14 is formed to be larger than that of the introduction portion 13. In this embodiment, the diameter of the introduction portion 13 is about 9.52 m.
m, the diameter of the body is about 25.4 mm. The tip of the main body 2 is formed with a diameter smaller than that of the body portion 14,
A jet portion 15 for jetting the refrigerant is formed from here.
The diameter of the ejection portion 15 is 1: 2. With respect to the diameter of the body portion.
A ratio of about 5 is preferable, and by narrowing the diameter of the ejection portion smaller than the diameter of the body portion in this way, the flow velocity of the refrigerant ejected from this can be increased.

The distribution section 4 is fixed to the outside of the body section 13, and a large number of distribution pipes 5 are inserted in a disc-shaped mixing wall 4a provided facing the injection section 15. As shown in FIG. 2, the distribution pipes 5 are arranged in a circle along the periphery of the mixing wall 4a, and in this embodiment, twelve distribution pipes 5 are provided at equal intervals of about 30 degrees. There is. Therefore, the distribution pipe 5 is not arranged in the central portion of the disc-shaped mixing wall 4a, and the refrigerant ejected from the ejection portion 15 directly collides with the distribution pipe 5 here.

The distribution pipe 5 arranged on the mixing wall 4a is
As shown in FIG. 1, the ejection portion 15 extends beyond the tip surface to a position intersecting with the tip surface. In this way, the spout 1
By arranging the distribution pipe 5 so as to cross the tip end surface of the pipe 5, a surely and sufficiently mixed product can be introduced into the distribution pipe 5.

Next, the operation of the flow divider according to this embodiment will be described.

In FIG. 3, the refrigerant introduced into the refrigerant pipe 7 is introduced into the flow divider 1 from the introduction pipe 11 via the solenoid valve 9. In the flow divider 1, the refrigerant is divided and supplied to a large number of distribution pipes 5, and each of the distribution pipes 5 is introduced into the heat exchanger 3 for heat exchange.

In the flow distributor 1, as shown in FIG. 1, the refrigerant introduced from the introduction pipe 11 into the introduction portion 13 of the main body 2 is introduced into the body portion 14 having a larger diameter than the introduction portion 13 and diffused therein. Further, the impurities are removed by passing through the strainer 16. The refrigerant that has passed through the strainer 16 is guided from the body portion 14 to the jet portion 15 whose diameter is narrowed, and the jet portion 15
Is ejected at high speed from and hits the mixing wall 17. In this way, the jetted refrigerant directly abuts the mixing wall 17, whereby the refrigerant is mixed and stirred, and the liquid refrigerant and the gas refrigerant mixed in the refrigerant are sufficiently mixed. The refrigerant thus sufficiently mixed is further inverted and flows into a substantially S-shape as shown by an arrow in FIG.

By flowing the refrigerant in the S-shape, the refrigerant can be more surely mixed, and the deviation between the liquid refrigerant and the gas refrigerant in the refrigerant introduced into each refrigerant pipe 5 can be surely prevented.

In this embodiment, since the gas-liquid state (mixed state of liquid and gas) of the refrigerant supplied to each distribution pipe 5 can be made substantially uniform, the heat exchange in the heat exchanger does not depend on heat.
The efficiency of heat exchange in the heat exchanger can be increased.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified without departing from the gist of the present invention.

For example, the distribution pipe 5 is the ejection part 1 of the introduction part 13.
It is not limited to extend so as to intersect with 5, and may extend so as not to intersect, and the distribution pipe 5 is not limited to being arranged on the mixing wall 4a, and the distribution pipe 5 may be distributed. The same effect can be obtained even if it is arranged on the peripheral wall 4b of No. 4.

Further, the diameter of the body portion 14 may be larger than that of the introduction portion 13, and the strainer 16 may be omitted.

[0023]

According to the refrigerant flow divider of the present invention, the refrigerant introduced from the introduction pipe is diffused in the body portion, and then is ejected by the ejection portion having a small diameter to accelerate the flow velocity of the refrigerant and eject it. The generated refrigerant collides with the mixing wall, and the liquid refrigerant and the gas refrigerant are sufficiently mixed here, and then distributed to the respective distribution pipes in a substantially equal gas-liquid state. Therefore, according to the present invention, the refrigerant can be evenly distributed to the plurality of distribution pipes without unevenness in the gas-liquid state.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a flow divider according to an exemplary embodiment of the present invention.

2 is a side view of the flow divider shown in FIG. 1. FIG.

3 is a front view showing a part of a refrigeration cycle using the flow divider shown in FIG. 1. FIG.

FIG. 4 is a sectional view of a conventional flow divider.

FIG. 5 is a cross-sectional view of another conventional shunt.

[Explanation of symbols]

 1 Divider 4a Mixing wall 5 Minute pipe 13 Introductory part 14 Body part 15 Spout part

Claims (1)

[Claims] 1. In a refrigerant flow divider for distributing the refrigerant introduced from an introduction pipe to a plurality of distribution pipes, an introduction part to which the introduction pipe is connected, a body part having a diameter larger than that of the introduction part, and the body part. And a mixing wall which is provided to face the ejection part and which mixes the refrigerant by colliding the refrigerant flowing out from the ejection part. .