JPH0498056A - Refrigerant flow divider - Google Patents

Abstract

PURPOSE:To enable a uniform divided flow of refrigerant to be attained by a method wherein a refrigerant flow divider is comprised of a cylindrical contained composed of a pair of container segments and a flow-in pipe fitted to a flow-in pipe insertion hole, having its extreme end being abutted against the other container segment and having a recessed part with a small area of a flow-out port, and a plurality of flow-out pipes inserted into flow-out pipe insertion holes, connected while the insertion extreme ends being contacted with a lower surface of the cylindrical container and having a recessed part at a central part of the cylindrical container at the insertion end thereof. CONSTITUTION:A refrigerant flow divider 1 is made such that a cylindrical container 2a having flow-out pipe insertion holes 7 at its upper surface and a cylindrical container 2b having a flow-in pipe insertion hole 6 at its lower surface are overlapped to each other and then connected at a welding part 2c. A recessed part 9 is formed at a central part of the cylindrical container 2a at an end part of each of the flow-out pipes 4 so as to act as a passage for refrigerant. The refrigerant flow divider 1 is operated such that a mixing of gaseous refrigerant and liquid refrigerant is promoted at the recess 8 in the flow-in pipe 3 and then a separation of the gaseous lifrigerant and liquid refrigerant is restricted. Each of the flow-in pipe 3 and the flow-out pipes 4 is inserted into and connected until they reach the cylindrical containers 2a and 2b, thereby it is not necessary to adjust a margin of insertion and then their connection can easily be performed. With such an arrangement, a uniform flow dividing can be carried out and a flow dividing property can be made stable.

Description

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

2. Description of the Related Art 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 Laid-Open No. 6193366).

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

Figures 4 and 6 are a perspective view and a cross-sectional view showing the shape of a conventional refrigerant divider. Figure 6 is an external perspective view showing how the refrigerant divider is attached to a heat exchanger, and Figures 7 to 6 are perspective views showing the shape of a conventional refrigerant divider. FIG. 9 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.

In FIGS. 4 to 9, reference numeral 51 denotes a refrigerant flow divider, which is composed of an inflow pipe 52, a plurality of outflow pipes 53, and a cylindrical container 64. In the cylindrical container 64, a plurality of outflow pipes 63 are joined to an outflow pipe insertion hole 55 arranged on the upper surface, and an inflow pipe 52 is joined to an inflow pipe insertion hole 56 arranged below. Also, 57
is a heat exchanger in which a refrigerant circuit is formed by refrigerant pipes 58, and a refrigerant flow divider 51 is attached to the side surface of the heat exchanger 57 to form a plurality of refrigerant circuits. Note that in the figure, arrow A indicates the moving direction of the coolant flow, 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 FIG.

When the cold gA flowing through the refrigeration cycle flows into the heat exchanger 67, it first flows into the refrigerant flow divider 6, is divided by the refrigerant flow divider 51, and flows into a plurality of refrigerant circuits formed by refrigerant pipes 58. 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 rate of the cold HA in the gas-liquid two-phase flow is reduced in the cylindrical container 54, and the gas and liquid are further separated. A part of the liquid phase A2 remains at the bottom of the cylindrical container 64, forming a liquid pool υ, which is circulated and disturbed by the newly flowing cold 11$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 allowance of the plurality of outflow pipes 53 into the cylindrical container 54, and variations in the insertion allowance occur during joining.

As shown in FIG.
This results in variations in the distance between the inlet and the liquid level, and a large amount of liquid phase A2 of refrigerant A flows 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, it is difficult for each refrigerant flow divider to The problem was that it was not possible to supply a stable refrigerant flow divider because of the different flow characteristics.

In addition, as a second problem, in the above configuration, when the entire flow divider is installed at an angle as shown in FIG. Since some of the outflow pipes 53 are close to the liquid surface, a large amount of the liquid phase A2 of the refrigerant A flows, resulting in a problem in that the weight of the refrigerant A cannot be divided evenly. Furthermore, even when the inflow pipe 62 is inclined as shown in FIG. 13, the cold HA flowing in from the inflow pipe 62 disturbs the liquid level in the inflow direction, making it easier for the liquid phase A2 to flow into some of the outflow pipes 53. However, there was a problem in 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 problems, the present invention provides a pair of outflow pipe insertion holes arranged on the upper surface and an inflow pipe insertion hole arranged in the center of the lower surface. a cylindrical container consisting of a container; an inflow pipe that is joined to the inflow pipe insertion hole and has a notch whose tip abuts the other container and reduces the area of the outflow port; The insertion part is joined with the tip of the insertion part in contact with the lower surface of the cylindrical container, and is composed of a plurality of outflow pipes each having a notch in the U direction in the cylindrical container at the insertion side end.

In addition, the inlet pipe has a smaller outlet area or a cutout is formed at the tip.

Function: With the above-described configuration, the present invention can maintain a constant insertion margin for the inflow pipe, and can also produce a throttling effect by reducing the area of the outflow port.

Further, in the present invention, since a notch is formed at the tip of the inflow pipe, the inflow can be made to flow out evenly, and the outflow port can be easily formed.

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.

FIGS. 1 and 2 show the shape of a refrigerant flow divider in a first embodiment of the present invention.

Reference numeral 1 designates a refrigerant flow divider, which includes a cylindrical container 2a having an outflow pipe insertion hole 7 on the upper surface, and a cylindrical container 2b having an inflow pipe insertion hole 6 on the lower surface.
are overlapped and joined by welding 2c. Reference numeral 3 denotes an inflow pipe that is joined to the inflow pipe insertion hole 6 of the cylindrical container 2b and has a plurality of notches 8 as outflow ports. The total area of these notches is set to be smaller than the cross-sectional area of the inflow pipe 3. Further, it is brought into contact with the other cylindrical container 2a. Reference numeral 4 designates an outflow pipe that is inserted into the outflow pipe insertion hole A and joined to the cylindrical container 2 with its insertion side tip in contact with the inner wall of the lower surface of the cylindrical container 2. Further, a notch 19 is provided at the end of the outflow pipe 14 toward the center of the cylindrical container 2a, and serves as a passage for the refrigerant.

In the refrigerant flow divider 1, the notch 8 of the inflow pipe 3 promotes gas-liquid mixing of the refrigerant and suppresses separation of gas and liquid.

In addition, the inflow pipe 3 and the outflow pipe 4 are each connected to a cylindrical container 2a.

By inserting and joining until reaching 2b, there is no need to adjust the insertion margin, and joining can be easily performed.

Therefore, each inlet pipe 3. Since the insertion allowance for the outflow pipes 4 can be made uniform, the height of the outflow pipe refrigerant inlet is constant for each outflow pipe, and the refrigerant mixed with gas and liquid is kept at the same distance during refrigeration cycle operation. It is possible to smoothly flow into each outflow pipe and divide the flow evenly.

Further, according to this method, there is almost no variation in the insertion margin between refrigerant flow dividers, and refrigerant flow dividers having stable flow distribution characteristics 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.

FIG. 3 shows the shape of a refrigerant flow divider according to another embodiment of the present invention, in which the cutout 8& of the inflow pipe 3 is formed from the tip of the inflow pipe 3, and the total cross-sectional area is set to be equal to the cross-sectional area of the inflow pipe 3. It is constructed by making it small, and by adjusting the degree of notch 8 from the tip, the amount of wrinkles υ can be easily changed, and the outlet can be easily formed.

Effects of the Invention As described above, the present invention provides a cylindrical container consisting of a pair of containers each having 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 that is joined to the outflow pipe insertion hole and has a notch formed at the outflow port; and an inflow pipe that 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 The refrigerant flow divider consists of a plurality of outflow pipes with notches in the direction of the cylindrical container. Furthermore, since there is no need to adjust the insertion allowance of the inflow pipes and the insertion allowance of each outflow pipe can be made uniform, equal flow division is possible. In addition, there is almost no variation in the insertion distance of the outlet tubes between samples, and a refrigerant flow divider with stable flow flow characteristics can be provided.

Furthermore, since a notch is formed at the tip of the inflow pipe, not only can the position of the insertion margin be adjusted easily, but also the notch can be easily formed.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the general shape of a refrigerant flow divider in an embodiment of the present invention, FIG. 2 is a sectional view of the refrigerant flow divider,
FIG. 3 is a sectional view of a refrigerant flow divider showing another embodiment of the present invention, FIG. 4 is a perspective view showing the general shape of a conventional flow divider, and FIG.
The figure is a cross-sectional view of the refrigerant divider, Figure 6 is a perspective view showing the heat exchanger installation state of the refrigerant divider, and Figure 7 is a refrigeration cycle when the outlet pipe insertion margin is different in the refrigerant divider. A cross-sectional view showing the flow of refrigerant during operation, Figure 8 is a cross-sectional view showing the flow of refrigerant when the entire refrigerant divider is installed at an angle, and Figure 9 is a cross-sectional view showing the flow of refrigerant when the entire refrigerant divider is installed at an angle. FIG. 3 is a cross-sectional view showing the flow of refrigerant when the refrigerant is installed. 1... Refrigerant flow divider, 2a, 2b...
Cylindrical container, 3...inflow pipe, 4...outflow pipe,
6...Inflow pipe insertion hole, 7...Outflow pipe insertion hole,
8, 8a... Notch, 9... Notch part. Name of agent: Patent attorney Shigetaka Awano and one other person
'B; *a yen? 1'l Inflow pipe Exit 萱f Input vII Inlet light pump out 'Il Input tile - 3・ Figure Figure Figure Figure

Claims (2)

[Claims] (1) A cylindrical container consisting of a pair of containers each having 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 connected to the inflow pipe insertion hole. an inflow pipe having a notch with its tip in contact with the other container to reduce the area of the outflow port, and an inflow pipe inserted into the outflow pipe insertion hole with the insertion part tip in contact with the lower surface of the cylindrical container,
A refrigerant flow divider comprising a plurality of outflow pipes each having a notch in the insertion side end toward the center of the cylindrical container. (2) A cylindrical container consisting of a pair of containers having 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 cylindrical container that is joined to the inflow pipe insertion hole. An inflow pipe whose tip is brought into contact with the other container, a notch is formed at the tip to serve as an outflow port, and the area of the outflow port is reduced, and the tip of the insertion portion inserted into the outflow pipe insertion hole contacts the cylindrical container. A refrigerant flow divider comprising a plurality of outlet pipes each having a notch in the direction of the center of the cylindrical container.