JPH0522766Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a connection structure for the inlet of a flow divider mainly used in refrigeration equipment, specifically, it divides refrigerant flowing through one pipe into multiple paths. The present invention relates to a connection structure for a flow divider inlet, which includes a flow divider and connects the piping to an inlet pipe of the flow divider.

(Prior Art) Conventionally, a flow divider is connected to a pipe extending from a compressor through a condenser and an expansion mechanism, and the flow divider divides the refrigerant flowing through the pipe into multiple paths to be supplied to an evaporator or the like. Refrigeration equipment, for example,
It is already known from the publication No. 57-7992.

Therefore, when connecting the inlet of the flow divider and the pipe, as shown in FIG. An enlarged diameter part a is formed, and an insertion part b having approximately the same diameter as the enlarged diameter part a is formed on the side of the pipe 5, and the insertion part b is inserted into the enlarged diameter part a and fixed. I try to do that.

Further, the enlarged diameter portion a provided in the inlet pipe 61
is used to connect to the coupler of the airtightness tester when performing the airtightness test of the flow divider 6. For example, when the outer diameter of the inlet pipe 61 is 9.5 mm, the expanded diameter part The length of a is set to approximately 7 mm.

(Problem to be solved by the invention) By the way, in the connection structure of the inlet part of the flow divider as described above, since the length of the enlarged diameter part a provided in the inlet pipe 61 is set short, the enlarged diameter part When connecting a and the insertion part b of the pipe 5, the insertion distance of the enlarged diameter part a to the insertion part b becomes small, and as shown in the figure, the pipe 5 and the flow divider are connected. 6 may be connected in an inclined state, and when the compressor is operated in this inclined state, the liquid-gas mixed refrigerant supplied from the pipe 5 through condensation and expansion action is connected to the pipe 5. A problem arises in that drifting occurs at the connection between the refrigeration system and the inlet pipe 61, leading to a decline in the functionality of the refrigeration system.

That is, in the connection part, due to its inclination,
Since the liquid refrigerant mainly flows on the side where the flow velocity is high, and the gas refrigerant mainly flows on the side where the flow velocity is low, each state of the refrigerant divided into a plurality of parts through the flow divider 6 is different from that in the liquid shortage state. As a result, it was not possible to extract sufficient refrigerating capacity.

The present invention was devised in view of the above-mentioned conventional problems, and its purpose is to accurately connect the inlet pipe and piping of the flow divider with simple connection work without slanting the inlet pipe and piping. It is an object of the present invention to provide a connection structure for a flow divider inlet that can be connected to the flow divider and that can stabilize the function of the refrigeration system without causing refrigerant drift in the flow divider.

(Means for solving the problem) In order to achieve the above purpose, the present invention first has the following features:
As shown in FIG. 1, a flow divider inlet section is provided with a flow divider 6 that divides the refrigerant flowing through one pipe 5 into multiple paths, and the pipe 5 is connected to an inlet pipe 61 of the flow divider 6. In the connection structure, the inlet pipe 61 and the piping 5 have the same diameter, and the inlet pipe 6
A first enlarged diameter portion 63 is formed at the end of 1, and
A second enlarged diameter portion 6 is located at a position apart from this first enlarged diameter portion 63.
4, a third enlarged diameter part 51 into which the first and second enlarged diameter parts 63 and 64 are inserted is formed at the end of the pipe 5, and the third enlarged diameter part 51 is inserted into the third enlarged diameter part 51. 1 and the first enlarged diameter portions 63 and 64 are inserted and fixed.

In the above connection structure, as shown in FIG. 1, the end of the inlet pipe 61 opens downward, and the pipe 5
It is desirable to apply this to a device whose end opens upward.

In addition, to achieve the same purpose as above, a second
As shown in the figure, a flow divider 6 is provided which divides the refrigerant flowing through one pipe 5 into multiple paths, and the flow divider 6
In the connection structure of the flow divider inlet part in which the pipe 5 is connected to the inlet pipe 61 of the flow divider, the inlet pipe 6
1 and the pipe 5 have the same diameter, and an enlarged diameter part 65 is formed at the end of the inlet pipe 61 into which the outer peripheral part of the pipe 5 is inserted. A small diameter portion 52 is formed to be inserted into the inside, and the piping 5 is inserted into the inlet pipe 61 and fixed therein.

In the above connection structure, as shown in FIG. 2, the end of the inlet pipe 61 opens upward, and the pipe 5
It is desirable to apply this to devices whose ends open downward.

(Function) Therefore, when connecting the inlet pipe 61 of the flow divider 6 and the pipe 5 in FIG.
In the third enlarged diameter portion 51 of this pipe 5, the inlet pipe 6
The first enlarged diameter portion 63 provided in the first enlarged diameter portion 63
A second enlarged diameter portion 64 provided at a predetermined distance from
In this way, the inlet pipe 61 and the piping 5 can be connected through the enlarged diameter portions 63 and 64 without being tilted, and even a simple connection operation can be performed easily. They are connected in a straight line and accurately.

Furthermore, the above connection structure is preferably applied to a structure in which the end of the inlet pipe 61 opens downward and the end of the pipe 5 opens upward, and when applied to such a structure, Since no constriction is formed inside the inlet pipe 61, that is, in the refrigerant flow path, the flow resistance of the refrigerant can be reduced even though the refrigerant is supplied upward from the bottom of the pipe 5. This enables smooth distribution.

Furthermore, in FIG. 2, when connecting the inlet pipe 61 of the flow divider 6 and the pipe 5, the small diameter part 52 provided in the pipe 5 is replaced with the enlarged diameter part 52 provided in the inlet pipe 61. The piping 5 is inserted into the interior from the portion 65 and fixed.
The inlet pipe 61 and the pipe 5 can be accurately connected in a straight line through the small diameter portion 52 with a simple connection operation without being inclined.

Furthermore, the above connection structure is preferably applied to a structure in which the end of the inlet pipe 61 opens upward and the end of the pipe 5 opens downward, and when applied to such a structure, Despite the fact that the small diameter portion 52 forms a constriction inside the inlet pipe 61, the refrigerant can flow from the upper side of the pipe 5 to the lower side with less flow resistance. .

(Example) Examples will be described with reference to the drawings.

The refrigeration system shown in FIG. 3 consists of a compressor 1, a condenser 2, and a capillary reach tube 3 that constitutes an expansion mechanism.
and an evaporator 4, and these devices are connected via refrigerant piping 5.

Furthermore, a flow divider 6 is interposed between the capillary reach tube 3 and the evaporator 4, which divides the refrigerant flowing through the pipe 5 into a plurality of paths and supplies the refrigerant to the evaporator 4 side. , this flow divider 6
An inlet pipe 61 integrally fixed to the pipe 5 is connected to the end of the pipe 5, and a plurality of connecting pipes 62 provided on the refrigerant discharge side of the flow divider 6 are connected to the evaporator 4, respectively.
He is trying to connect it to each heat exchange tube 41 of.
A header 42 to which each of the heat exchange tubes 41 is connected is provided on the refrigerant discharge side of the evaporator 4, and the refrigerant is circulated from the header 42 to the compressor 1 side.

Therefore, when connecting the inlet pipe 61 of the flow divider 6 and the end of the piping 5, the following connection structure was adopted.

That is, as shown in detail in FIG. 1, the inlet pipe 61 integrally fixed to the flow divider 6 and the pipe 5 are each formed to have the same outer diameter, and the inlet pipe 61 is provided at an intermediate portion in the longitudinal direction. A first enlarged diameter section 63 having a diameter larger than that of the inlet pipe 61 is formed by flaring means or the like, and a first enlarged diameter section is formed at the tip of the inlet pipe 61 remote from the first enlarged diameter section 63. A second enlarged diameter part 64 having the same outer diameter as that of 63 is formed by a pipe expanding means, while a second enlarged diameter part 64 having the same outer diameter as that of
The third enlarged diameter portion 51, which allows insertion of the second enlarged diameter portions 63 and 64, is integrally formed by flaring means or the like as in each of the above cases.

When connecting the inlet pipe 61 of the flow divider 6 and the piping 5, the third
The inlet pipe 61 of the flow divider 6 is provided inside the enlarged diameter portion 51.
The first and second enlarged diameter portions 63 and 64 provided in the
Each outer peripheral portion of the expanded diameter portion 51 is fixed by brazing means or the like.

As described above, the piping 5 and the flow divider 6
By connecting the inlet pipe 61 to the inlet pipe 61, the inlet pipe 61 and the pipe 5 can be easily connected via the enlarged diameter portions 63, 64, and 51 without inclining the two. This allows for accurate connections in a straight line.

Furthermore, as is clear from FIG. 1, the above connection structure is applicable to the flow divider 6 where the end of the inlet pipe 61 opens downward and the end of the piping 5 opens upward. In case of application to such a device, since no constriction is formed inside the inlet pipe 61 through which the refrigerant flows, the pipe 5 is Even though the refrigerant is supplied, the flow resistance of the refrigerant is reduced, allowing smooth flow.

Further, the connection structure of the present invention can also be constructed as shown in FIG. An enlarged diameter part 65 having a diameter larger than that of the inlet pipe 61 is integrally formed at the tip of the inlet pipe 61 by flaring means or the like, and an enlarged diameter part 65 having a diameter smaller than that of the pipe 5 is integrally formed at the tip of the pipe 5. The small diameter portion 52 having an outer diameter that is approximately the same as the inner diameter of the inlet pipe 61 may be integrally formed by drawing means or the like.

When connecting the inlet pipe 61 of the flow divider 6 and the piping 5, the small diameter portion 52 provided on the pipe 5 is inserted into the inside of the flow divider 6 from the enlarged diameter portion 65 of the inlet pipe 61. With the outer periphery of the pipe 5 locked in the enlarged diameter part 65, the enlarged diameter part 65 and each outer periphery of the pipe 5 are fixed by brazing means or the like.

As described above, the piping 5 and the flow divider 6
By connecting the inlet pipe 61 of
2 and the enlarged diameter portion 63 of the inlet pipe 61 to which the outer circumferential portion of the pipe 5 is locked, the inlet pipe 61 and the pipe 5 can be connected easily without being inclined. This allows for accurate connections in a straight line.

In addition, the above connection structure is simpler than the one in Figure 1 because it requires only the end portions of the tube to be enlarged and drawn, and there is no enlarged diameter section in the middle of the tube. As is clear from FIG. 2, this is applied to the flow divider 6 in which the tip of the inlet pipe 61 opens upward and the tip of the piping 5 opens downward. When applied to such a device, although a constricted portion is formed inside the inlet pipe 61 through which the refrigerant flows by the small-diameter portion 52 provided in the pipe 5, there is no flow from the upper side of the pipe 5. Since the refrigerant is supplied downward, the refrigerant can be circulated with less resistance to flow.

(Effects of the invention) Since the present invention is configured as described above, it has the following effects.

In the connection structure of the first aspect, the inlet pipe 61 and the pipe 5 in the flow divider 6 are formed to have the same diameter, and the first enlarged diameter part 63 is formed at the end of the inlet pipe 61. A second enlarged diameter part 64 is formed at a position apart from the first enlarged diameter part 63, and a third enlarged diameter part 64 is formed in the end of the pipe 5 so that the first and second enlarged diameter parts 63 and 64 can be inserted, respectively. Since the diameter portion 51 is formed and the enlarged diameter portions 63 and 64 are inserted and fixed into the third enlarged diameter portion 51, the inlet pipe 61 of the flow divider 6 and the piping 5 are connected. Even simple connections can be made in a straight line and accurately without tilting.

Further, the connection structure according to claim 2 is applied to a structure in which the end of the inlet pipe 61 of the flow divider 6 opens downward, and the end of the piping 5 opens upward. , even though no constriction is formed inside the inlet pipe 61, that is, in the refrigerant flow path, and therefore the refrigerant is supplied from the bottom of the pipe 5 upwards.
By reducing the flow resistance of this refrigerant, smooth flow becomes possible.

Furthermore, in the connection structure of claim 3, the inlet pipe 61 of the flow divider 6 and the pipe 5 are formed to have the same diameter, and the outer peripheral part of the pipe 5 can be inserted into the end of the inlet pipe 61. At the same time, at the end of the pipe 5, a small diameter part 52 is formed to be inserted into the inlet pipe 61, and the pipe 5 is inserted into the inlet pipe 61 and fixed. Because of this, it is possible to expect the same effects as the above-mentioned connection structure of claim 1, and moreover, the overall structure can be simplified.

Moreover, in the connection structure of claim 4, since the end of the inlet pipe 61 in the flow divider 6 is opened upward and the end of the pipe 5 is opened downward, the Although a constricted portion is formed inside the inlet pipe 61 by the small diameter portion 52 of the pipe 5, the refrigerant can be made to flow from the upper side of the pipe 5 to the lower side with little flow resistance. It's ivy.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing a connection structure at the inlet of a flow divider according to the present invention, Fig. 2 is a partially cutaway front view showing another embodiment, and Fig. 3 is a refrigeration system using the same connection structure. The piping diagram of the device, FIG. 4 is a partially cutaway front view showing a conventional example. 5... Piping, 51... Third enlarged diameter part, 52... Small diameter part, 6... Flow divider, 61... Inlet pipe, 63...
1st enlarged diameter part, 64... second enlarged diameter part, 65... enlarged diameter part.

Claims (1)

[Claims for Utility Model Registration] 1. A flow divider 6 that divides the refrigerant flowing through one pipe 5 into multiple paths, and an inlet pipe 6 of the flow divider 6.
1, the inlet pipe 61 and the pipe 5 are made to have the same diameter, and the end of the inlet pipe 61 is connected to the inlet pipe 5.
A first enlarged diameter section 63 is formed, and a second enlarged diameter section 64 is formed at a position apart from the first enlarged diameter section 63. A third enlarged diameter portion 51 into which the portions 63 and 64 are inserted is formed, and the third enlarged diameter portion 51 is provided with the third enlarged diameter portion 51.
and a connection structure for a flow divider inlet, characterized in that first enlarged diameter portions 63 and 64 are inserted and fixed. 2. A connection structure for a flow divider inlet according to claim 1, wherein the end of the inlet pipe 61 opens downward and connects the pipe 5 that opens upward. 3 A flow divider 6 is provided that divides the refrigerant flowing through one pipe 5 into multiple paths, and an inlet pipe 6 of the flow divider 6 is provided.
1, the inlet pipe 61 and the pipe 5 are made to have the same diameter, and the end of the inlet pipe 61 is connected to the inlet pipe 5.
An enlarged diameter portion 65 into which the outer peripheral portion of the piping 5 is inserted is formed, and a small diameter portion 52 is formed at the end of the piping 5 to be inserted into the inlet pipe 61. A connection structure for a flow divider inlet, characterized in that a pipe 5 is inserted and fixed. 4. A connection structure for a flow divider inlet according to claim 3, wherein the end of the inlet pipe 61 opens upward and connects the pipe 5 which opens downward.