JPH0476360A - Refrigerant distributor - Google Patents

Abstract

PURPOSE:To promote the mixing of the gas and the liquid of refrigerant at the nozzle, to dispense with adjustment of outflow tubes with regard to their marginal portions for insertion, and to enable even distribution by providing an inflow tube and a plurality of outflow tubes, said inflow tube having an outflow port formed of a nozzle part and each of said outflow tubes having the inserted end in contact with and joined with the lower side of a cylindrical vessel and having a notch in the inserted end. CONSTITUTION:A nozzle part 8 in an inflow tube 3 functions to promote the mixing and reduce the separation between the gas and the liquid of refrigerant. Each of outflow tubes 4 is inserted into a cylindrical vessel 2 and brought into contact with the lower side of the cylindrical vessel 2 and joined so that adjustment of the marginal portions for insertion between the outflow tubes 4 can be dispensed with and the parts in contact can be joined easily. The uniformity of the marginal portions for insertion between the outflow tubes, which is rendered possible, enables providing a refrigerant inlet with a fixed height in each outflow tube so that, in the operation of a refrigeration cycle, the refrigerant, which flows out of the nozzle part 8 as a mixture of the gas and the liquid as a result of the effect of the nozzle part 8, flows smoothly into the respective equally distant outflow tubes. Thus even distribution can be rendered possible. Also according to this constitution, the marginal portions for insertion between refrigerant distributors show little diversity so that refrigerant distributors having stabilized distribution characteristics can be supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refrigerant flow divider for uniformly dividing refrigerant in a refrigeration cycle of aircraft equipment, refrigeration equipment, etc.

BACKGROUND OF THE INVENTION In recent years, refrigerant flow dividers have been used to cope with the multiplication of refrigeration systems and the use of multiple circuits as heat exchanger tubes become smaller in diameter, and their importance is increasing.

Among the refrigerant flow dividers, copper molded products are often used because they are compact, low cost, and easy to manufacture and install (for example, Japanese Patent Application Laid-Open No. 61-93366).

Hereinafter, the conventional refrigerant flow divider mentioned above will be explained with reference to the drawings.

Figures 8 and 9 are a perspective view and a cross-sectional view showing the shape of a conventional refrigerant divider, Figure 10 is an external perspective view showing how the refrigerant divider is attached to a heat exchanger, and Figure 11 is a perspective view showing the shape of a conventional refrigerant divider. FIG. 13 is a sectional view showing the refrigerant state inside the refrigerant flow divider when the heat exchanger is operated in a refrigeration cycle and used as an evaporator.

8 to 13, reference numeral 51 denotes a refrigerant flow divider, which is composed of an inflow pipe 52, a plurality of outflow pipes 63, and a cylindrical container 64.

The cylindrical container 54 has an outflow pipe insertion hole 56 arranged on the top surface.
A plurality of outflow pipes 53 are joined to the inflow pipe 62, and an inflow pipe 62 is joined to the inflow pipe insertion hole 56 disposed below. Also, 5
Reference numeral 7 denotes a heat exchanger that constitutes a refrigerant circuit using refrigerant pipes 58, and a refrigerant flow divider 61 is attached to the side surface of the heat exchanger 67 to form a plurality of refrigerant circuits. Note that arrow A in the figure indicates the moving direction of the refrigerant flow, and arrow G indicates the direction of gravity.

Regarding the refrigerant flow divider configured as above, the following is the first part.
The operation will be explained using FIG. 0 and FIG. 11.

When the refrigerant A flowing through the refrigeration cycle flows into the heat exchanger 57, it once flows into the refrigerant flow divider 61, is divided by the refrigerant flow divider 61, and flows into a plurality of refrigerant circuits formed by refrigerant pipes 68. When a heat exchanger is used as an evaporator, the refrigerant flow divider 61 allows the refrigerant A, which has become a two-phase flow of a gas phase A1 and a liquid phase A2, to flow into the cylindrical container 64 from the inflow pipe 52, and flows into the cylindrical container 64 through multiple outflows. It flows out from the pipe 53. At this time, the flow velocity of the gas-liquid two-phase refrigerant A is reduced in the cylindrical container 64, and the gas and liquid are further separated. A portion of the liquid phase A2 remains at the bottom of the cylindrical container 64, forming a liquid pool, and the liquid pool is circulated and agitated by the newly flowing refrigerant A.

Problems to be Solved by the Invention However, the first problem with the above configuration is that it is difficult to adjust the insertion of the plurality of outflow pipes 530 into the cylindrical container 64, and variations in the insertion margin occur during joining.

As shown in Fig. 11, the variation in the insertion allowance is caused by
3, the distance between the inlet and the liquid level will vary, and a large amount of liquid phase A2 of refrigerant A will flow into the outlet pipe that is close to the liquid level, making it impossible to divide the flow evenly. Also, due to variations in the insertion clearance, each refrigerant flow divider The problem was that it was not possible to supply a stable refrigerant flow divider with different flow characteristics.

In addition, as a second problem, in the above configuration, the 12th
If the entire flow divider is installed at an angle as shown in the figure,
Among the outflow pipes 53 attached to the upper surface of the cylindrical container 64, some of the outflow pipes 53 located at the bottom vertically are closer to the liquid surface, so a large amount of the liquid phase A2 of the refrigerant A flows, and the weight of the refrigerant A is reduced. The problem was that it was not possible to divide the flow evenly. Further, even when the inflow pipe 62 is inclined as shown in FIG. 13, the liquid level in the inflow direction is disturbed by the refrigerant A flowing in from the inflow pipe 62, and the liquid phase A2 easily flows into a part of the outflow pipe 53. However, the problem was that it was not possible to distribute the weight evenly to the refrigerant.

In view of the above problems, the present invention provides a refrigerant flow divider that can evenly divide refrigerant.

Means for Solving the Problems In order to solve the above first problem, the first invention of the present invention is as follows:
A cylindrical container consisting of a plurality of outflow pipe insertion holes arranged on the upper surface and an inflow pipe insertion hole arranged in the center of the lower surface, and a nozzle part joined to the inflow pipe insertion hole and formed at the outflow port. Consisting of an inflow pipe and a plurality of outflow pipes that are inserted into the outflow pipe insertion hole and joined with the tip of the insertion part in contact with the lower surface of the cylindrical container, and have a notch at the insertion side end toward the center of the cylindrical container. It is something that will be done.

However, in order to solve the second problem, the second aspect of the present invention has a convex portion disposed at the center of the upper surface, a plurality of outflow pipe insertion holes disposed around the convex portion, and a central portion of the lower surface. a cylindrical container consisting of an inflow pipe insertion hole disposed in the inflow pipe insertion hole; an inflow pipe joined to the inflow pipe insertion hole and having a nozzle portion formed at the outflow port; and a plurality of outflow pipes joined to the outflow pipe insertion hole. It consists of:

Effects The first aspect of the present invention, with the above-described configuration, can promote gas-liquid mixing of the refrigerant and suppress separation of gas and liquid.

Furthermore, there is no need to adjust the insertion allowance of the outflow pipes, and the insertion allowance of each outflow pipe can be made uniform, so the height of the refrigerant inlet of the outflow pipe can be made constant for each outflow pipe,
Equal flow distribution becomes possible. Furthermore, a refrigerant flow divider with stable flow characteristics between samples can be provided.

Further, according to the second aspect of the present invention, with the above-described configuration, the refrigerant separated into gas and liquid flowing through the inflow pipe is ejected from the nozzle portion of the inflow pipe outlet and collides with the inner surface of the convex portion provided on the upper surface of the cylindrical container. The jetting effect, collision with the wall surface, and disturbance effect promote gas-liquid mixing, promote uniformity of the gas-liquid two-phase flow, and allow each refrigerant to flow smoothly into the outflow pipes arranged in the radial direction, even when installed at an inclined angle. It divides the flow evenly into the pipes.

EXAMPLE Hereinafter, a refrigerant flow divider according to an example of the first aspect of the present invention will be described with reference to the drawings.

Figures 1 and 2 show the shape of the refrigerant divider in the first embodiment of the present invention, and Figure 3 shows the inside of the refrigerant divider when the heat exchanger is operated in a refrigeration cycle and used as an evaporator. Indicates refrigerant status.

1 is a refrigerant flow divider, 2 is a cylindrical container having an outflow pipe insertion hole 7 on the top surface and an inflow pipe insertion hole 6 on the bottom surface, and 3 is a cylindrical container 2.
The inflow pipe 4 is connected to the inflow pipe insertion hole 6 of the cylindrical container 2 and has a nozzle part 8 at the outflow port. It is an outflow pipe joined to the container 2. Further, a notch 19 is provided at the end of the outflow pipe 14 toward the center of the cylindrical container 2,
It becomes a passage for refrigerant.

In the refrigerant flow divider 1, the nozzle portion 8 of the inflow pipe 3 promotes gas-liquid mixing of the refrigerant, and prevents separation of gas and liquid. Further, by inserting and joining the outflow pipe 4 until it touches the bottom surface of the cylindrical container 2, there is no need to adjust the insertion margin of the outflow pipe 4, and joining can be easily performed. Since the insertion allowance of each outflow pipe can be made uniform, the height of the refrigerant inlet of the outflow pipe is constant for each outflow pipe, and during refrigeration cycle operation, the effect of the nozzle part 8 as shown in FIG. The refrigerant mixed with gas and liquid flows smoothly to each outflow pipe having the same distance, and can be evenly divided. Further, according to this method, there is almost no variation in insertion between refrigerant flow dividers, and refrigerant flow dividers having stable flow distribution characteristics can be provided.

As described above, according to this embodiment, the cylindrical container 2 includes a plurality of outflow pipe insertion holes 7 arranged on the upper surface and an inflow pipe insertion hole 6 arranged at the center of the lower surface, and the inflow pipe an inflow pipe 3 joined to the insertion hole 6 and having a nozzle portion 8 formed at the outflow port;
It is composed of a plurality of outflow pipes 4 which are inserted into the outflow pipe insertion hole 7 and joined with the tip of the insertion part in contact with the lower surface of the cylindrical container, and which has a notch 9 at the insertion side end toward the center of the cylindrical container. The refrigerant flow divider 1 promotes gas-liquid mixing of the refrigerant, making it possible to suppress gas-liquid separation within the refrigerant flow divider. In addition, the outflow pipes can be easily joined without the need for adjusting the insertion margin, and furthermore, since the insertion margin is uniform, it is possible to divide the flow evenly. Furthermore, a refrigerant flow divider with stable flow flow characteristics with almost no variation in insertion margin between samples can be provided.

Next, a refrigerant flow divider according to a second embodiment of the present invention will be described with reference to the drawings.

4 and 6 show the shape of the refrigerant flow divider in the embodiment of the second invention of the present invention, and FIGS. 6 and 7 show the refrigerant flow when the heat exchanger is operated in a refrigeration cycle and used as an evaporator. Indicates the refrigerant condition inside the flow divider.

11 is a refrigerant flow divider, 12 is a convex part 15 and a convex part 1 in the center of the upper surface.
A cylindrical container having an outflow pipe insertion hole 17 around 5 and an inflow pipe insertion hole 16 on the lower surface; 13 is joined to the inflow pipe insertion hole 16 of the cylindrical container 12, and a nozzle part 18 is provided at the outflow port. The inflow pipe 14 is an outflow pipe inserted into the outflow pipe insertion hole 17. In addition, arrow B in the figure indicates the flow direction of the refrigerant, and arrow G
indicates the direction of gravity.

Regarding the refrigerant flow divider configured as above, the sixth section will be described below.
The operation will be explained using the diagram and FIG. 7.

The refrigerant B flowing through the closed circuit of the refrigeration cycle becomes a two-phase flow B of a gas phase B1 and a liquid phase B2 and flows into the refrigerant flow divider 11.

The refrigerant B flowing into the refrigerant flow divider 11 is contracted and accelerated by the nozzle portion 18 of the inflow pipe 13 and becomes a jet flow, which flows into the cylindrical container 1.
2, collides with the inner wall of the convex portion 16 on the upper surface of the cylindrical container 12, and is further stirred and mixed. Through this collision, stirring, and mixing action, the mixed state of the gas-liquid two-phase flow of the coolant B is homogenized, and the homogenized refrigerant B is transferred to the convex portion 15 and the cylindrical container 1.
2 radially along the inner wall and flow into each outflow pipe 14 . At this time, because the refrigerant B (l-1: gas-liquid separation is small and uniform inside the cylindrical container 12), even if the refrigerant B (l-1) is installed at an angle as shown in FIG. Furthermore, even if the inflow pipe is installed at an angle as shown in FIG. By colliding, the refrigerant directly flows out of some pipes 1
Since the flow does not flow into 4, an even divided flow can be obtained.

Note that the smaller the height of the cylindrical container 12 and the shorter the distance to the outlet of the outflow pipe, the higher the flow velocity of the refrigerant B in the cylindrical container, the more effective the gas-liquid mixing effect of the refrigerant is, and the more the generation of liquid pools can be suppressed. .

As described above, according to this embodiment, the convex portion 16 disposed at the center of the upper surface, the plurality of outflow pipe insertion holes 17 disposed around the convex portion 16, and the plurality of outflow pipe insertion holes 17 disposed at the center of the lower surface. Inflow pipe insertion hole 1
6, and an inflow pipe 1 which is in contact with and fitted to the inflow pipe insertion hole 16 and has a nozzle portion 18 formed at the outflow port.
3, and a refrigerant flow divider 11 consisting of a plurality of outflow pipes 14 connected to the outflow pipe insertion hole 17, the gas-liquid mixing of the refrigerant in the cylindrical container 12 is progressed, and the gas-liquid two-phase flow is homogenized. , the refrigerant can flow smoothly into the outflow pipes 14 arranged in the radial direction, and even if the refrigerant flow divider 11 is installed at an angle, the flow can be divided evenly.

Effects of the Invention As described above, the first aspect of the present invention provides a cylindrical container comprising a plurality of outflow pipe insertion holes arranged on the upper surface and an inflow pipe insertion hole arranged in the center of the lower surface, An inflow pipe joined to the pipe insertion hole and having a nozzle portion formed at the outflow port, and a cylindrical container inserted into the outflow pipe insertion hole and joined with the tip of the insertion part in contact with the lower surface of the cylindrical container, and the insertion side end of the cylindrical container. The refrigerant flow divider 1, which is composed of a plurality of outflow pipes having a notch in the center direction, allows the nozzle to promote gas-liquid mixing of the refrigerant and suppress separation of gas and liquid. There is no need to adjust the insertion allowance of the tubes, and the insertion allowance of each outflow pipe can be made uniform, so that equal flow distribution is possible. It is possible to supply a refrigerant flow divider with stable flow characteristics, with almost no variation in outlet tube insertion between samples.

Further, the second invention of the present invention provides a convex portion disposed at the center of the upper surface, a plurality of outflow pipe insertion holes disposed around the convex portion, and an inflow pipe insertion hole disposed at the center of the lower surface. A cylindrical container consisting of a cylindrical container, an inflow pipe joined to the inflow pipe insertion hole and having a nozzle portion formed at the outflow port, and a plurality of outflow pipes joined to the outflow pipe insertion hole. The refrigerant can be mixed with gas and liquid, and the gas-liquid two-phase flow can be made uniform and smoothly flowed out to the outflow pipes arranged in the radial direction, and when the flow divider is installed at an angle. However, it is possible to divide the flow evenly.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the schematic shape of a refrigerant divider in an embodiment of the first invention, FIG. 2 is a sectional view of the refrigerant divider, and FIG. 3 is a diagram of the refrigerant divider during refrigeration cycle operation. FIG. 4 is a cross-sectional view showing the flow of refrigerant, FIG. 4 is a perspective view showing the general shape of a refrigerant divider according to the second embodiment of the present invention, FIG. 6 is a cross-sectional view of the refrigerant divider, and FIG. A cross-sectional view showing the flow of refrigerant during refrigeration cycle operation when the refrigerant divider is installed with the entire inlet pipe tilted. A cross-sectional view showing the flow of refrigerant during refrigeration cycle operation, Fig. 8 is a perspective view showing the general shape of a conventional flow divider, Fig. 9 is a cross-sectional view of the same refrigerant flow divider, and Fig. 10 is a diagram of the same refrigerant flow divider. A perspective view showing the installed state of the heat exchanger, Fig. 11 is a sectional view showing the refrigerant flow during refrigeration cycle operation when the outflow pipe is inserted differently in the refrigerant divider, and Fig. 12 shows the refrigerant divider. Figure 13 is a cross-sectional view showing the refrigerant flow when the entire refrigerant divider is installed with the inlet pipe tilted. be. 1.11... Refrigerant flow divider, 2,12...
・Cylindrical container, 3, 13...Inflow pipe, 4, 14・
...Outflow pipe, 15...Protrusion, 6, 1e.
...Inflow pipe insertion hole, 7゜17...Outflow pipe insertion hole, 8, 18...Nozzle part, 9...
・Notch part. Name of agent: Patent attorney Shigetaka Awano and one other person Seimai 11 --1 N1; Heavy! 9 Shiki 5; [+2-°
Circle Ibu 4th section 13--Zuki inlet tube 17...-5L Outlet insertion hole Figure 10 Sawa No. 11m 0 O- θ Figure 12

Claims (2)

[Claims] (1) A cylindrical container consisting of a plurality of outflow pipe insertion holes arranged on the top surface and an inflow pipe insertion hole arranged in the center of the bottom surface,
The inflow pipe is joined to the inflow pipe insertion hole and has a nozzle portion formed at the outflow port, and the inflow pipe is inserted into the outflow pipe insertion hole and joined with the tip of the insertion part in contact with the lower surface of the cylindrical container, and the insertion side end A refrigerant flow divider consisting of a plurality of outflow pipes each having a notch in the direction of the center of a cylindrical container. (2) A cylindrical container consisting of a convex portion disposed at the center of the upper surface, a plurality of outflow pipe insertion holes disposed around the convex portion, and an inflow pipe insertion hole disposed at the center of the lower surface; A refrigerant flow divider comprising an inflow pipe joined to the inflow pipe insertion hole and having a nozzle portion formed at the outflow port, and a plurality of outflow pipes joined to the outflow pipe insertion hole.