JP2010133644A - Distributor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust an inflow ratio of fluid to each distribution flow channel with respect to a fluid distributor. <P>SOLUTION: In this distributor having a receiving section 2 to receive the fluid 11, and having the plurality of distribution flow channels 5a-5f for distributing the fluid flowing into the receiving section, concave and convex sections 13 for increasing flow channel resistance, are formed on the distribution flow channels as the flow channel resistance elements, and the inflow ratio of the distribution flow 12 to each distribution flow channel is adjusted by making the flow channel resistance to each of the plurality of distribution flow channels different from each other by the flow channel resistance elements. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a distributor that distributes a fluid transferred in an upstream flow path to a plurality of downstream flow paths, and more particularly to a distributor that is suitable for circulating a refrigerant through a heat transfer tube of a heat exchanger in a refrigeration cycle. .

  A refrigeration cycle used in an air conditioner or the like includes a process of circulating a refrigerant through a heat exchanger and exchanging heat with surrounding air, and the heat exchanger includes a plurality of heat transfer tubes and a plurality of fins. A fin tube type is generally used. The heat exchange between the refrigerant and the air is generally performed by blowing an air flow generated by a blower using a propeller fan or the like through the heat exchanger.

  In the heat exchange between the refrigerant and air in such a refrigeration cycle, the flow rate and flow rate of the air that blows through the heat exchanger will be different in the heat exchanger parts, and accordingly in each heat transfer tube constituting the heat exchanger The heat exchange efficiency will be different. For this reason, in the heat exchanger, it is desirable to increase the overall heat exchange efficiency so that the amount of refrigerant flowing through each heat transfer tube can be adjusted according to the heat exchange efficiency of each.

  By the way, a distributor is used as a method of circulating the refrigerant through each heat transfer tube of the heat exchanger. Specifically, the refrigerant transferred from the upstream side by a single pipe is distributed by a distributor to a number of branch pipes corresponding to the number of heat transfer pipes and is circulated through each heat transfer pipe. In this case, it is common to use a distributor having a receiving part for receiving the fluid transferred from the upstream and having a plurality of distribution channels for distributing the fluid flowing into the receiving part. is there. Conventionally, in the distribution of such a refrigerant, an even distribution type distributor has been used. In the uniform distribution type distributor, each distribution flow path is formed in the same manner, and the distribution rate (inflow rate) of the fluid to each distribution flow path becomes uniform, and thus the heat transfer tubes of the heat exchanger itself. It is not possible to adjust the refrigerant flow rate to

  Therefore, conventionally, a branch piping system has been used to adjust the flow rate of the refrigerant flowing through each heat transfer tube. That is, this is a method of adjusting the circulation amount of the refrigerant to each heat transfer tube by adjusting the pipe length and the pipe route of the branch pipe for each heat transfer tube connected to the plurality of distribution flow paths in the distributor.

  In addition, about the divider | distributor used for distribution of the refrigerant | coolant distribute | circulated to the heat exchanger in a refrigerating cycle, the example disclosed by patent document 1-patent document 3 is known, for example.

JP-A-3-260566 Japanese Patent Laid-Open No. 10-148419 JP 2002-22313 A

  The branch piping system as described above requires adjustment of the pipe length and the piping path for each branch pipe. Therefore, the branch piping method has problems that the piping space increases and the piping cost increases due to complicated piping work. Therefore, there is a need for a method that enables adjustment of the refrigerant flow rate to each heat transfer tube of the heat exchanger without using the branch piping method.

  In order to make it possible to adjust the refrigerant flow rate regardless of the branch piping system, the distributor itself is provided with a refrigerant flow rate adjustment function. In other words, it is effective for the distributor to be able to adjust the distribution ratio (inflow rate) of the refrigerant to each distribution flow path.

  As for the distributor itself having the refrigerant flow rate adjustment function, for example, as in the example disclosed in Patent Document 1, the flow path diameter of each distribution flow path in the distributor is made different, thereby the flow path of each distribution flow path. A structure for adjusting the resistance is conceivable. However, the flow resistance adjustment of the distribution flow path by the flow path diameter does not necessarily provide a large distribution rate difference, and cannot sufficiently meet the refrigerant flow rate adjustment to each heat transfer tube required by the heat exchanger in the refrigeration cycle. . This is especially true when the distributor is rotationally symmetric.

  A rotationally symmetric distributor is provided such that a plurality of distribution channels are arranged on a virtual circle centered on the axis of the receiving unit, that is, the plurality of distribution channels are related to the axis of the receiving unit. It is a divider | distributor provided so that it may be in a rotationally symmetric state. Such a rotationally symmetric distributor is excellent in space saving and cost reduction regarding refrigerant distribution in the heat exchanger. However, a rotationally symmetric distributor is generally manufactured by machining using, for example, a brass bar, and there is a limit to the length of the distribution channel due to restrictions on the processing, In addition, there is a lower limit to the channel diameter of the distribution channel due to the problem of clogging due to contamination in the fluid. For this reason, merely changing the flow path diameter of each distribution flow path within the range of possible flow path diameter adjustments can hardly give a difference to the flow path resistance of each distribution flow path, and therefore can be obtained with a heat exchanger in the refrigeration cycle. It is practically impossible to adjust the refrigerant flow rate to each heat transfer tube.

  The present invention has been made in the background as described above, and its problem is to adjust the refrigerant flow rate to each heat transfer tube required for a heat exchanger in a refrigeration cycle for a rotationally symmetric distributor, for example. It is possible to adjust the inflow rate of the fluid into each distribution channel so that it can sufficiently respond.

  The inventors of the present invention have studied the structure for varying the inflow rate of the fluid into each distribution channel in the rotationally symmetric distributor. As a result, it has been found that a structure in which a flow path resistance element for increasing the flow path resistance is provided in the distribution flow path, and thereby the flow path resistance of each distribution flow path is made different is effective.

  That is, if the flow path resistance of the distribution flow path is different by 10% or more depending on whether or not the flow path resistance element is provided, that is, if the flow path resistance when the flow path resistance element is not provided is 1, the appropriate When the flow path resistance element is provided, the flow path resistance can be 1.1 or more. Further, if the channel resistance by the channel resistance element and the channel resistance by the channel diameter are combined, a larger channel resistance difference can be given to each distribution channel. The flow path resistance difference of 1.1 times or more can sufficiently meet the refrigerant flow amount adjustment to each heat transfer tube required by the heat exchanger in the refrigeration cycle, for example, thereby providing a rotationally symmetric distributor. Thus, for example, the refrigerant distribution structure in the heat exchanger of the refrigeration cycle can be reduced in space and cost.

  The present invention solves the above problems based on the above knowledge. Specifically, it has a receiving part which receives the fluid transferred by the upstream flow path, and distributes the fluid flowing in from the upstream flow path to the receiving part to flow down to a plurality of downstream flow paths. In a distributor having a plurality of distribution channels and arranged so that the plurality of distribution channels are arranged on a virtual circle centered on the axis of the receiving portion, A flow resistance element is provided in the distribution flow path, and the flow resistance of the plurality of distribution flow paths is made different by the flow path resistance element so that the fluid flows into the distribution flow paths from the receiving portion. It is characterized by adjusting the rate.

  An uneven surface portion is effective as a flow path resistance element in the distributor as described above. The uneven surface portion in this case is formed on the inner peripheral surface of the distribution flow path so as to make the inner peripheral surface of the distribution flow path uneven, and is excellent in workability. That is, the rotationally symmetric distributor is generally manufactured by machining as described above, but the uneven surface portion is formed in one step of machining of the distributor (for example, machining by an NC lathe). Can be processed as a single step), thereby reducing the processing cost related to the flow path resistance element. For this reason, in the distributor as described above in the present invention, as the flow path resistance element, it is preferable to use an uneven surface portion formed so as to make the inner peripheral surface of the distribution flow path uneven. .

  Making the uneven surface for the uneven surface portion, for example, by forming a spiral groove on the inner peripheral surface of the distribution flow path, which can be formed by threading with a tap, enables a larger flow resistance. In that respect, it is also excellent in workability. Therefore, in the distributor as described above in the present invention, the uneven surface of the inner peripheral surface of the distribution channel is formed by forming a spiral groove on the inner peripheral surface of the distribution channel. This is a preferred form.

  A coil member is also effective as the flow path resistance element in the distributor as described above. When the flow path resistance element is formed of a coil member, for example, a standard commercially available coil spring can be used, and the processing burden related to the flow path resistance element can be reduced. For this reason, in the distributor as described above in the present invention, it is preferable that a coil member inserted and installed in the distribution flow path is used as the flow path resistance element.

  An orifice member is also effective as a flow path resistance element in the distributor as described above. In this case, the orifice member is provided with a flow hole (orifice) having a diameter smaller than the diameter of the distribution channel, and is used by partially installing the distribution channel to narrow the channel diameter of the distribution channel. It is a member to be. Such an orifice member is inserted and installed, for example, or by using a combination of a plurality of different diameters of the respective flow holes, so that the diameter of the distribution flow path is simply different from that of the case. It is possible to provide a large flow path resistance. Therefore, in the distributor as described above in the present invention, a flow hole having a diameter smaller than the diameter of the distribution flow path is formed as the flow path resistance element, and an orifice member inserted and installed in the distribution flow path is provided. It is a preferred form that it is used.

  In the distributor as described above, different flow path resistances are set for the respective distribution flow paths by the flow path resistance element. For example, in the case of distribution of the refrigerant to the heat exchanger in the refrigeration cycle, the heat exchanger The distribution flow path to be connected to each heat transfer tube is determined corresponding to the flow resistance set for each. Therefore, if the connection of each branch pipe connected to each heat transfer tube of the heat exchanger and each distribution flow path is wrong, the desired performance cannot be exhibited in the heat exchanger. In order to effectively prevent such a connection error, it is effective to attach an identification mark that enables identification of each inflow rate for each distribution channel. For this reason, in the present invention, the distributor as described above is preferably provided with an identification mark for each of the plurality of distribution channels for each of the distribution channels.

  According to the present invention as described above, with respect to the rotationally symmetric distributor, for example, each distribution flow that can sufficiently meet the refrigerant flow amount adjustment to each heat transfer tube required by the heat exchanger in the refrigeration cycle. It is possible to adjust the flow rate of the fluid into the channel.

  Hereinafter, modes for carrying out the present invention will be described. 1-3, the structure of the divider | distributor 1 by 1st Embodiment is simplified and shown. FIG. 1 shows an appearance viewed from the side, FIG. 2 shows a state seen from the direction of arrow A in FIG. 1, and FIG. 3 shows a state taken along the line BB in FIG. ing.

  As shown in FIG. 3, the distributor 1 includes a receiving part (aggregation part) 2, a rectification part 3, a diffusion part 4, a distribution flow path 5 (5 a to 5 f), and a branch pipe connection part 6 (6 a to 6 f). A rotationally symmetric type in which a plurality (six in the example in the figure) of distribution channels 5 are arranged on a virtual circle S (FIG. 2) centered on the axis of the receiving portion 2 It is. Such a distributor 1 is usually manufactured by a cutting process of cutting from a bar material such as brass by an NC lathe or the like.

  The receiving part 2 receives the fluid 11 transferred by the upstream pipe Pa for the upstream flow path. Here, when the transfer destination of the fluid distributed by the distributor 1 is, for example, a heat exchanger of a refrigeration cycle that functions as an evaporator, the fluid 11 becomes a refrigerant, and the refrigerant is in a gas-liquid two-phase state. The fluid 11 received by the receiving unit 2 flows down so as to be collected at the center by the rectifying unit 3 and flows into the diffusion unit 4 where the gas and liquid are homogenized. The fluid 11 that has passed through the diffusing section 4 has a distribution flow 12 (in the drawing, a distribution flow 12a in the distribution flow channel 5a and a distribution flow 12d in the distribution flow channel 5d in accordance with the flow rates of the distribution flow channels 5a to 5f. It flows into each of the distribution flow paths 5a to 5f. The distribution flow 12 generated by the distribution flow path 5 flows down the branch pipe Pb for the downstream flow path connected to each of the distribution flow paths 5a to 5f via the branch pipe connection portions 6 (6a to 6f). Then, it is transferred to each transfer destination (not shown) (for example, each heat transfer tube in the heat exchanger of the refrigeration cycle).

  The flow path resistance of each of the above-described distribution flow paths 5a to 5f is set using a flow path resistance element that increases the flow path resistance of the distribution flow path 5. That is, the inflow rate (distribution rate) of the distribution flow 12 to each of the distribution channels 5a to 5f can be adjusted by varying the degree of increase in the channel resistance by the channel resistance element for each of the distribution channels 5a to 5f. Thereby, the transfer amount of the fluid to each transfer destination of the distribution flow 12 by the distributor 1 can be adjusted.

  In this embodiment, as shown in FIG. 3, the uneven surface portion 13 is used as a flow path resistance element. The uneven surface portion 13 is formed so as to make the inner peripheral surface of the distribution flow path 5 uneven, and the flow resistance of the distribution flow path 5 is increased by the uneven surface. Further, in the present embodiment, the concave and convex surface for the concave and convex surface portion 13 is formed by forming a spiral groove on the inner peripheral surface of the distribution flow path 5. That is, the uneven surface portion 13 is formed as a spiral groove portion. The spiral groove of the concavo-convex surface portion 13 can be formed by threading with a tap. In such a case, the concavo-convex surface portion 13 that is also the spiral groove portion is formed as a threaded portion. Here, the threading process can be performed as one step of the machining process of the distributor 1, thereby reducing the machining cost related to the flow path resistance element.

  The degree of increase in the channel resistance due to the uneven surface portion 13 in the case of the threaded portion can be set by using the screw length (length of the uneven surface portion 13), the thread height, and the screw pitch as parameters. However, when a standard tap is used for threading, the thread height and the thread pitch are determined by the tap, so the screw length is a practical parameter.

  In the example of FIG. 3, the distribution flow path 5a is provided with a flow path resistance element, and the distribution flow path 5d is not provided with a flow path resistance element. However, by appropriately selecting the screw length L, the distribution flow path 5a is not provided. The channel resistance between the channel 5a and the distribution channel 5d can be different by 1.1 times or more. Therefore, the distribution rate to the distribution channel 5a is set to 1 / 1.1 or less of the distribution rate to the distribution channel 5d. be able to. Such a difference in flow path resistance can sufficiently meet the refrigerant flow rate adjustment to each heat transfer tube required by a heat exchanger in a refrigeration cycle, for example, and space saving and cost reduction can be achieved. Thus, a distribution structure that takes advantage of the characteristics of the rotationally symmetric distributor can be realized in a heat exchanger in a refrigeration cycle.

  Here, when the spiral groove of the concavo-convex surface portion 13 is formed by threading, various shapes of screws such as a triangular screw, a square screw, a trapezoidal screw, a sawtooth screw, and a round screw can be used as the screw. However, the triangular screw is excellent in the function of increasing the flow resistance, and the triangular screw is also used in this embodiment.

  As described above, in the distributor 1, different inflow rates (distribution ratios) are set in the distribution flow paths 5a to 5f. For example, if the refrigerant is distributed to the heat exchanger in the refrigeration cycle, The distribution flow paths 5a to 5f to be connected to the heat transfer tubes of the exchanger are determined in accordance with the set inflow rates. Therefore, if the connection between each branch pipe Pb connected to each heat transfer tube of the heat exchanger and each distribution flow path 5 is wrong, the desired performance cannot be exhibited in the heat exchanger. In order to effectively prevent such a connection mistake, the distributor 1 has an identification mark 14 (in the example shown in the figure, “1”, “2”...) For identifying the inflow rates of the distribution flow paths 5a to 5f. Are marked) in correspondence with the positions of the distribution flow paths 5a to 5f. The marking process of the identification mark 14 can be performed as one step of the cutting process of the distributor 1, thereby reducing the processing cost related to the marking process.

  FIG. 4 shows a simplified configuration of the distributor 21 according to the second embodiment. The distributor 21 of this embodiment is basically the same as the distributor 1 according to the first embodiment. The distributor 21 is different from the distributor 1 in that the distribution channel 5a is provided with a channel resistance element and the distribution channel 5d is not provided with a channel resistance element. It is to make it smaller than that of 5d. That is, in the distributor 21, in relation to the distribution flow path 5d, the distribution flow path 5a is combined with the flow path resistance due to the uneven surface portion 13 and the flow path resistance due to the flow path diameter. By doing so, a larger flow path resistance difference can be given to the distribution flow path 5a and the distribution flow path 5d, and therefore the distribution rate difference between the distribution flow path 5a and the distribution flow path 5d can be further increased. .

  Other configurations are the same as those of the distributor 1 of FIG. Therefore, the same reference numerals as those in FIG. 3 are given to the components common to the distributor 1, and the above explanation is used for them.

  FIG. 5 shows a simplified configuration of the distributor 31 according to the third embodiment. The distributor 31 of this embodiment is basically the same as the distributor 1 according to the first embodiment. The distributor 31 is different from the distributor 1 in that the flow path resistance element is formed by the uneven surface member 32. Specifically, the flow path resistance element of the distribution flow path 5a is formed by inserting and installing an uneven surface member 32 having a flow path 34 having an uneven surface portion 33 similar to the uneven surface portion 13 in FIG. . In this case, if the flow path diameter of the distribution flow path 5a is the same as that of the distribution flow path 5d, as a result, the distribution flow path 5a has a flow resistance and flow caused by the uneven surface portion 33 in relation to the distribution flow path 5d. It becomes the structure which combined the flow path resistance by a path diameter. In addition, when using the uneven | corrugated surface member 32, the internal peripheral surface of the flow path 34 turns into an effective internal peripheral surface of the distribution flow path 5a.

  The uneven surface member 32 can be manufactured by a process different from the process of manufacturing the main body of the distributor 31. By this, the uneven surface portion 13 is distributed as in the distributor 1 in the first embodiment. In some cases, the processing cost is more advantageous than the case of processing as part of one manufacturing process.

  Other configurations are the same as those of the distributor 1 of FIG. Therefore, the same reference numerals as those in FIG. 3 are given to the components common to the distributor 1, and the above explanation is used for them.

  FIG. 6 shows a modification of the uneven surface portion 13 (or the uneven surface portion 33) in the above embodiment. FIG. 6 shows a state in which the inner peripheral surface of the distribution flow path 5a (or the inner peripheral surface of the flow path 34 of the uneven surface member 32) is developed. In this modification, the concave and convex surface portion 13 is made uneven by forming triangular grooves 35 that are inclined in a linear state on the inner peripheral surface of the distribution flow path 5a at an appropriate pitch. In this modification, the triangular groove is formed in a straight line state, but the triangular groove may be formed in a curved state instead.

  FIG. 7 shows a simplified configuration of the distributor 41 according to the fourth embodiment. The distributor 41 of this embodiment is basically the same as the distributor 1 according to the first embodiment. The distributor 41 is different from the distributor 1 in that the flow path resistance element is formed by the coil member 42. Specifically, the flow path resistance element of the distribution flow path 5a is formed by inserting and installing the coil member 42. The coil member 42 increases the channel resistance of the distribution channel 5a in the same manner as the uneven surface in the uneven surface portion 13. As such a coil member 42, a standard commercially available coil spring can be used. Therefore, according to the present embodiment, it is possible to reduce the processing burden related to the flow path resistance element.

  Other configurations are the same as those of the distributor 1 of FIG. Therefore, the same reference numerals as those in FIG. 3 are given to the components common to the distributor 1, and the above explanation is used for them.

  FIG. 8 shows a simplified configuration of the distributor 51 according to the fifth embodiment. The distributor 51 of this embodiment is basically the same as the distributor 1 according to the first embodiment. The distributor 51 is different from the distributor 1 in that the flow path resistance element is formed by the orifice member 52. Specifically, the flow path resistance element of the distribution flow path 5a is formed by inserting and installing the orifice member 52.

  The orifice member 52 is configured by providing a flow hole (orifice) 53 having a diameter smaller than the flow path diameter of the distribution flow path 5 a, and the flow path diameter of the distribution flow path 5 a is set by the flow hole 53 by being installed in the distribution flow path 5 a. It functions to partially narrow, thereby increasing the channel resistance of the distribution channel 5a. Therefore, the degree of increase in the channel resistance by the orifice member 52 can be set by the combination of the diameter of the flow hole 53 and the length of the flow hole 53 and the orifice member 52. In particular, the structure in which the orifice member 52 is combined is effective in increasing the flow path resistance. As shown in the example of FIG. By using them in combination, it is possible to exhibit the same flow path resistance increasing performance as in the case of the uneven surface portion 13 in FIG. 3 and the coil member 42 in FIG.

  Other configurations are the same as those of the distributor 1 of FIG. Therefore, the same reference numerals as those in FIG. 3 are given to the components common to the distributor 1, and the above explanation is used for them.

  An example of a fluid distribution structure to which the distributor according to each embodiment as described above is applied is schematically shown in FIG. In the fluid distribution structure of FIG. 9, this is the case for the heat exchanger 61 of the refrigeration cycle, and thus for the refrigerant distribution. The heat exchanger 61 is of a fin tube type, and includes a plurality of heat transfer tubes 62 and a plurality of fins 63 that are integrated with each heat transfer tube 62 in a heat conductive manner. Heat exchange with the surrounding air. For this purpose, the air flow 65 generated by the blower 64 is blown through the heat exchanger 61. In this case, the flow rate and flow rate of the air flow 65 that blows through the heat exchanger 61 are different in the portion of the heat exchanger 61, for example, the central portion and the peripheral portion, and the heat exchange efficiency in each heat transfer tube 62 is accordingly different. It will be.

  For this reason, in the case of the heat exchanger 61, in order to increase the overall heat exchange efficiency, it is necessary to be able to adjust the circulation amount of the refrigerant circulated through each heat transfer tube 62 according to the heat exchange efficiency of each. For this purpose, for example, the distributor 1 according to the first embodiment is used in the refrigerant distribution structure. Specifically, the refrigerant (which is in a gas-liquid two-phase state by passing through the expansion valve 66) transferred through the upstream pipe Pa for the upstream flow path is passed through the distributor 1, As described above, each distributor flow having a different distribution ratio is formed by the distributor 1. Then, each of the distribution flows is caused to flow down through the branch pipe Pb for the downstream flow path and is circulated through the heat transfer tubes 62.

  Here, each heat transfer tube 62 is formed in a U shape, so that the refrigerant flows in from one end and the refrigerant vaporized by heat exchange flows out from the other end. The vaporized refrigerant is collected by the collecting pipe 66 and transferred downstream.

  As mentioned above, although the form for implementing this invention was demonstrated, these are only representative examples, This invention can be implemented with various forms in the range which does not deviate from the meaning.

It is a figure which shows the side surface appearance of the divider | distributor by 1st Embodiment. It is a figure which shows the state seen from the arrow A direction in FIG. It is a figure which shows the state cut along the BB line in FIG. It is a figure which shows the structure of the divider | distributor by 2nd Embodiment. It is a figure which shows the structure of the divider | distributor by 3rd Embodiment. It is a figure which shows the modification of an uneven surface part. It is a figure which shows the structure of the divider | distributor by 4th Embodiment. It is a figure which shows the structure of the divider | distributor by 5th Embodiment. It is a figure which shows the example of the fluid distribution structure using a divider | distributor.

Explanation of symbols

1, 21, 31, 42, 51 Distributor 2 Receiving part 5 Distribution flow path 11 Fluid 13, 33 Uneven surface part 14 Identification mark 42 Coil member 52 Orifice member 53 Flow hole Pa Upstream side piping (upstream side flow path)
Pb branch piping (downstream channel)
S virtual circle

Claims (6)

A plurality of distribution channels having a receiving unit for receiving fluid transferred in the upstream channel and distributing the fluid flowing from the upstream channel to the receiving unit and flowing down to a plurality of downstream channels; And the plurality of distribution channels are arranged so as to be arranged on a virtual circle centered on the axis of the receiving portion,
A flow path resistance element that increases flow path resistance is provided in the distribution flow path, and the flow resistance of the plurality of distribution flow paths is made different by the flow path resistance element so that the plurality of distribution flow paths from the receiving portion. A distributor characterized by adjusting an inflow rate of the fluid to each.   2. The distributor according to claim 1, wherein an uneven surface portion formed so as to make the inner peripheral surface of the distribution flow path uneven is used as the flow path resistance element.   The distributor according to claim 2, wherein the uneven surface of the inner peripheral surface of the distribution flow path is formed by forming a spiral groove on the inner peripheral surface of the distribution flow path.   The distributor according to claim 1, wherein a coil member inserted and installed in the distribution flow path is used as the flow path resistance element.   2. The flow path resistance element according to claim 1, wherein a flow hole having a diameter smaller than the diameter of the distribution flow path is provided, and an orifice member inserted and installed in the distribution flow path is used. Distributor.   The distributor according to any one of claims 1 to 5, wherein an identification mark for identifying each of the plurality of distribution channels with respect to the inflow rate is attached to each distribution channel.

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