JPH0868574A - Distributor for air conditioner - Google Patents

Abstract

PURPOSE: To uniformly distribute operating medium to many capillary tubes at low cost by enclosing a capillary tube connecting member with an overcoating member made of copper formed with a capillary tube connecting hole and a flow tube connecting hole, and brazing the tube to the capillary tube connecting hole and a medium flow tube to the flow tube connecting hole. CONSTITUTION: A plurality of capillary tube connecting holes 7 parallel with the axial core of a capillary tube connecting member 4 are formed through the member 4, and the member 4 is enclosed by a overcoating member 6 made of copper having excellent ductility. Accordingly, even if the number of the tubes 3 are many, it can be simply manufactured with low cost. Since the tube 3 is connected to the hole 7 formed at the member 4 made of brass, etc., via the hole 11 formed at the member 6, it can be accurately connected, and operating medium can be uniformly distributed. Even at the time of brazing the tube 3, since it can be brazed 13 to the hole 11 of the member 6 of the copper of the same material, its melting temperature may be low, and even if the pitch between the tubes 3 is short, no erosion occurs at the adjacent tubes 3 but the tube can be connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow divider for a working medium in an air conditioner, and more particularly, to an evaporator having a plurality of independent vaporizing sections for supplying the working medium evenly to the vaporizing sections. To a suitable flow divider.

[0002]

2. Description of the Related Art In recent air conditioners, in order to reduce the pipe diameter of the evaporator and to improve the characteristics of the evaporator, the evaporator is composed of a plurality of independent evaporation parts, and each evaporation part has What has been developed is one in which the working medium is evenly supplied. Explaining with reference to FIG. 5, the working medium is compressed by the compressor 31 into high-temperature and high-pressure gas, which is supplied to the condenser 33 via the flow path switching valve 32, and the working medium is condensed by the condenser 33. Is condensed and liquefied, and the working medium in a liquid state containing a part of gas is branched into a plurality of thin tubes 35 by the flow divider 34,
The working medium is supplied to a plurality of evaporators 37 constituting the evaporator 36 via the thin tubes 35, and the working medium is evaporated by these evaporators 37 to remove the heat of vaporization from the outside air to cool the outside air, The working medium discharged from 37 is recirculated to the compressor 31 via the flow path switching valve 32.

As a conventional flow divider 34, as shown in FIG. 6, a main body 41 made of brass is bored with a flow pipe connecting hole 42 for connecting a medium flow pipe communicating with the condenser, and the other end side is formed. It is known that a plurality (three in the illustrated example) of thin tube connection holes 43 for connecting thin tubes communicating with each evaporation part are formed at equal intervals on a circumference centered on the axis of the main body. Each thin tube connecting hole 43 is drilled diagonally from the other end surface of the main body so as to communicate with the end of the flow tube connecting hole 42, and the opening end portion 43a is separately drilled perpendicularly to the other end surface to form a thin tube. It can be joined vertically.

Further, as shown in FIG. 7, a flow pipe connecting hole 52 is bored from one end side of the main body 51 and a vertical thin pipe connecting hole 53 is bored from the other end side of the main body 51 at an intermediate portion in the axial center direction. It is also known that a radial communication hole 54 for communicating the end of the thin tube connection hole 53 and the end of the flow tube connection hole 52 with each other is bored from the outer peripheral surface in the radial direction, and the outer peripheral open end is sealed with a plug 55. Has been.

Further, as shown in FIG. 8, the main body 61 is composed of a flow pipe connecting member 65 and a thin pipe connecting member 66, and the two are fitted to each other and integrated by brazing 67. A communicating portion 64 is formed by recessing on the joint end surface of either one of the pipe 65 and the thin pipe connecting member 66, and the communicating portion 64 is formed in the flow pipe connecting member 65 and the thin pipe connecting member 66 respectively.
It is known that the flow pipe connecting hole 62 and the thin pipe connecting hole 63 are perforated so as to penetrate through.

[0006]

However, in the flow distributor shown in FIG. 6, a plurality of thin tube connection holes 43 are provided in the distribution tube connection hole 4.
It is necessary to form a hole diagonally so as to communicate with No. 2, and it is difficult to form a hole with high precision and the workability is poor. It was

Further, in the flow distributor shown in FIG. 7, it is possible to eliminate the oblique hole processing of the thin tube connecting hole, but it is necessary to accurately perforate the radial communicating hole 54 from the outer peripheral surface of the main body 51, and the plug is provided. Since it is necessary to completely seal it with 55, there is a problem that the number of processing steps increases and the cost increases.

Further, in the flow distributor shown in FIG. 8, the flow pipe connecting member 65 and the thin pipe connecting member 66 can be easily processed.
It is necessary to join the both in a completely sealed state by brazing 67 or welding, which causes a problem that the number of processing steps increases and the cost increases.

Further, if the number of the thin tubes 35 to be connected is about three as shown in FIG. 6, it is not so large, but recently, there is a demand for a flow diverter capable of dividing into 10 or more thin tubes 35. In that case In addition to the above problems, the more important problem is that the brass body 41,
When joining the thin tubes 35 composed of 51 and 61 and copper tubes by brazing, the pitch between the thin tubes 35 and 35 is small, and a high melting temperature is required for joining with brass,
There is a problem that the thin tube adjacent to the joined thin tube may be melted and damaged.

Further, even if the working medium is condensed by the condenser, 10
About 15% of the working medium remains in a gas state, and the working medium flows in a two-phase flow state from the condenser 33 to the evaporator 36. Therefore, in solving the above problem, a two-phase flow state is obtained. It is also necessary to solve the problem that even if the working medium is, the flow must be divided evenly. A configuration is also known in which the working medium in a gas state after condensation is extracted to bypass the evaporator, but there is a problem that the cost becomes high.

The present invention has been made in view of the above problems of the prior art, and it is an object of the present invention to propose a flow divider for an air conditioner which can be manufactured at low cost and can evenly divide the working medium into a large number of thin tubes. And

[0012]

In order to achieve the above object, the present invention provides a working medium flowing to a condenser according to claim 1, if indicated by reference numerals in the drawings. In the shunt 1 of the air conditioner in which the medium flow pipe 2 to be connected is connected to one end and the plurality of thin pipes 3 which are respectively connected to the plurality of evaporation portions are connected to the other end, the connection ends of the respective thin pipes 3 are fitted and connected. Thin tube connecting member 4 having a plurality of thin tube connecting holes 7 formed therethrough
Is surrounded by a copper jacket member 6 formed with a thin tube connecting hole 11 corresponding to the thin tube connecting hole 7 and a flow tube connecting hole 12 for inserting the medium flow tube 2, and the thin tube 3 is soldered in the thin tube connecting hole 11. The medium distribution pipe 2 is attached to the distribution pipe joint hole 12 by brazing.

In the second aspect, the thin pipe connecting member is a thin pipe connecting member 5 in which a connecting pipe connecting hole of the medium flowing pipe 2 is inserted into the outer jacket member 6 to form a through hole. The contact portion is arranged so as to be in contact with 4, and the communication tube connecting hole 8 and each thin tube connecting hole 7 are connected to each other to form a communicating portion.

Further, according to a third aspect of the present invention, the thin tube connecting member 4 or both the thin tube connecting member 4 and the flow tube connecting member 5 are formed of die cast products. Is adopted.

Further, according to a fourth aspect of the present invention, a communication chamber 10 facing the distribution pipe connection hole 7 and each of the narrow pipe connection holes 8 is formed on the contact surface between the narrow pipe connection member 4 and the distribution pipe connection member 5. Claim 2
Alternatively, the configuration described in 3 is adopted.

Further, in the fifth aspect, the contact surface 14 is formed on the outer peripheral portions of the thin tube connecting member 4 and the flow tube connecting member 5,
A concavity in which a conical projection 15 is provided in the center of the thin tube connecting member 4 and an annular communication chamber 17 having a V-shaped cross section is formed between the flow tube connecting member 5 and the projection 15. 16 is formed, and the structure according to claim 4 is adopted.

Further, in the sixth aspect, a conical projecting portion 18 having a narrow tube connection hole 7 opening to the inclined surface is provided on the contact surface of the thin tube connection member 4 with the flow tube connection member 5 in a protruding manner. In addition, the concave portion 1 having a V-shaped cross section in which the protruding portion 18 is fitted in the flow pipe connecting member 5 and the flow pipe connecting hole 8 is opened at the center position
9. The structure according to claim 2 or 3, wherein the narrow pipe connecting holes 7 are formed and the thin pipe connecting holes 7 are connected to the flow pipe connecting holes 8 by the communication grooves 20 formed on the slopes of the protrusions 18, respectively. .

Further, in the present invention, an annular relay chamber 22 facing the thin tube connecting hole 7 is formed on the contact surfaces of the thin tube connecting member 4 and the flow tube connecting member 5, and the relay chamber of the thin tube connecting member 4 is formed. 22
A conical protrusion 18 is provided on the inner side of the so that the protrusion 18 fits into the flow pipe connecting member 5 and the flow pipe connecting hole 8 is formed.
Forming a concave portion 19 having a V-shaped cross-section that opens at a central position, and connecting the flow pipe connecting hole 8 and the relay chamber 22 with a plurality of spiral communication grooves 23 formed on the slope of the protrusion. Two
Alternatively, the configuration described in 3 is adopted.

Further, in claim 8, the relay room 2
The configuration according to claim 7 in which the net-like body 24 is housed in 2 is adopted.

[0020]

In the first aspect of the present invention, the thin tube connecting member 4 is provided.
Since a plurality of thin tube connecting holes 7 parallel to the axis of the thin tube connecting holes 7 are formed through the holes, the thin tube connecting member 4 is surrounded by a copper outer jacket member 6 having good ductility. Even if the number of 3 is large, it can be easily manufactured at low cost, and the thin tube 3 is connected to the thin tube connecting hole 7 formed in the thin tube connecting member 4 made of brass or the like through the thin tube connecting hole 11 formed in the outer jacket member 6. Since they are connected, the working medium can be connected accurately and the working medium can be evenly divided. Also, when brazing the thin tube 3, it is sufficient to braze 13 to the thin tube joining hole 11 of the copper outer member 6 made of the same material. The temperature may be low, and even if the pitch between the thin tubes 3 is small, there is no risk of melting damage to the adjacent thin tubes 3, and the thin tubes 3 can be joined with good workability.

In the second aspect, the distribution pipe connecting member 5 having the distribution pipe connecting hole 8 formed in the outer jacket member 6 is disposed in contact with the thin pipe connecting member 4, and the distribution pipe connecting hole 8 and each thin pipe are arranged. Since the communication portion 10 that communicates with the connection hole 7 is formed, the working medium smoothly flows from the flow pipe 2 to the thin tube 3 without stagnation in the outer jacket member 6, and the working medium does not drop in pressure. The flow pipe connection member 5 and the thin tube connection member 4 that abuts the flow pipe connection member 5 are surrounded by the outer jacket member 6, and the flow pipe connection hole 8 and the thin tube connection hole 7 are provided at both ends of the outer jacket member 6, respectively. Since the flow pipe 2 and the thin pipe 3 to be fitted are brazed to the outer jacket member 6, even if there is some leakage in the abutting portion and the fitting portion, these leaked gases do not leak to the outside, and as a whole. Good airtightness can be maintained.

According to the third aspect of the present invention, the thin tube connecting member 4 or both the thin tube connecting member 4 and the flow tube connecting member 5 are made of die-cast products, so that they are machined as compared with the case where they are machined. It can be manufactured at a lower cost.

According to the fourth aspect of the present invention, the communication chamber 10 facing the distribution pipe connection hole 8 and each of the distribution pipe connection holes 7 is formed in the contact surface between the distribution pipe connection member 4 and the distribution pipe connection member 5. The communication chamber 10 can be easily formed while ensuring an even flow distribution, and can be manufactured at low cost.

According to the fifth aspect of the present invention, the conical protrusion 15 projecting from the thin tube connecting member 4 and the recess 16 formed in the flow tube connecting member 5 form an annular communication chamber 17 having a V-shaped cross section. Since it is formed, the working medium can be evenly divided while flowing more smoothly from the flow pipe 2 to the thin pipe 3.

According to the sixth aspect of the present invention, a conical projection 18 and a recess 19 are formed on the thin tube connecting member 4 and the flow tube connecting member 5, respectively, and the communicating groove 20 is formed on the slope of the projecting portion 18. Since each thin tube connection hole 7 is connected to the distribution tube connection hole 8 with each other, the working medium can be uniformly split while smoothly flowing from the distribution tube 2 to the thin tube 3 without causing stagnation. Even in the case of a two-phase flow of gas and liquid, the flow can be divided evenly, and the communication groove 2 can be formed on the outer surface of the protrusion 18.
Since it is only necessary to form 0, it is possible to easily and accurately process and form.

According to a seventh aspect of the present invention, a plurality of spiral communication grooves 23 are formed which form an annular relay chamber 22 facing the thin tube connecting hole 7 and which are formed on the slope of the projecting portion 18 provided on the thin tube connecting member 4.
Since the distribution pipe connection hole 8 and the relay chamber 22 are connected by
The relay chamber 22 can be easily provided even when a large number of thin tube connection holes 7 are provided.
And the working medium flows into the relay chamber 22 through the spiral communication groove 23 formed on the slope of the conical protrusion 18, so that the working medium is disturbed in the relay chamber 22.
Even when the working medium is a two-phase flow of gas and liquid when the flow is divided into a large number of thin tubes 3, the flow can be evenly divided.

In the eighth aspect, since the mesh body 24 is housed in the relay chamber 22, the working medium that spirally flows into the relay chamber 22 through the spiral communication groove 23 is the same. The bubbles contained therein are finely pulverized and mixed into the liquid while passing through the mesh 24, so that the subsequent operability can be improved.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A flow divider according to a first embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, reference numeral 1 denotes a flow divider, which is connected to a medium flow pipe 2 connected to a condenser (not shown) at one end, and is connected to a plurality of evaporators (not shown). A plurality of (three in the illustrated example) thin tubes 3 are connected to the other end.
The flow distributor 1 includes a short round shaft-shaped thin tube connecting member 4 and a flow pipe connecting member 5 that is arranged to abut on the thin tube connecting member 4 in the axial direction and has a tapered portion 5a formed on the side opposite to the abutting portion. The outer cover member 6 surrounds the connecting members 4 and 5. Both the thin tube connecting member 4 and the distribution tube connecting member 5 are made of a die cast product such as brass. Of course, it can also be manufactured by machining. Further, the jacket member 6 is composed of a bottomed copper pipe, and such a copper pipe is easily and inexpensively manufactured by deep drawing or the like.

The thin tube connecting member 4 is formed with a plurality of thin tube connecting holes 7 into which the connecting ends of the respective thin tubes 3 are fitted and connected from one end surface thereof in parallel with the axis. These thin tube connecting holes 7 are arranged at equal intervals on the circumference centered on the axis of the thin tube connecting member 4. In addition, a step portion 7 a that regulates the insertion amount of the thin tube 3 is formed in the middle of the thin tube connection hole 7.

A distribution pipe connection hole 8 is formed at the axial center of the distribution pipe connection member 5 for inserting and connecting the connection end of the medium distribution pipe 2 from the other end surface on the side opposite to the thin pipe connection member 4. There is. A step portion 8 a that regulates the insertion amount of the medium circulation pipe 2 is formed in the middle of the circulation pipe connection hole 8. In addition, a shallow circular concave portion 9 having a diameter such that the opening end of each thin tube connecting hole 7 faces the one end surface of the flow tube connecting member 5 that abuts on the thin tube connecting member 4.
Is formed, and the communication chamber 1 is formed between the thin tube connecting member 4 and the other end surface thereof.
0 is formed.

The outer jacket member 6 has a bottom end at one end formed with a thin tube connection hole 11 corresponding to the thin tube connection hole 7 of the thin tube connection member 4 disposed inside, and the other end portion is a flow tube disposed inside. A cylindrical flow pipe connecting hole 12 having the same diameter and the same diameter as the flow pipe connecting hole 8 of the connecting member 5 is formed. When the thin pipe connecting member 4 and the flow pipe connecting member 5 are arranged in the outer jacket member 6 and then the flow pipe connecting hole 12 is narrowed down and formed, the thin pipe connecting hole 7 is formed.
By appropriately setting the pins by raising the pins corresponding to the thin pipe joining holes 11 and by raising the pins corresponding to the flow pipes 2 in the flow pipe connection holes 8 and drawing the pins, it is possible to perform molding with high dimensional accuracy.

When the medium flow pipe 2 and the thin pipe 3 are connected to the flow distributor 1 having the above structure, the medium flow pipe 2 is connected to the flow pipe connecting hole until the tip of the medium flow pipe 2 contacts the step portion 8a of the flow pipe connecting hole 8. 12
, And the end of the flow pipe joining hole 12 and the outer peripheral surface of the medium flow pipe 2 are brazed 13 with copper braze until the tip of the thin pipe 3 comes into contact with the step 7a of the thin pipe connecting hole 7. The connection is completed by inserting from the thin tube joining hole 11 and brazing 13 the peripheral edge of the thin tube joining hole 11 and the outer peripheral surface of the thin tube 3 with copper solder.

According to this embodiment, a plurality of thin tube connecting holes 7 parallel to the axis of the thin tube connecting member 4 are machined,
With respect to the distribution pipe connection member 5, the distribution pipe connection hole 8 and the circular recess 9
Since these are processed and surrounded by the mantle member 6 made of copper having good ductility, they can be easily manufactured at low cost even if the number of the thin tubes 3 is large. Furthermore, by constructing the thin tube connecting member 4 and the distribution tube connecting member 5 with die-cast products, it is possible to manufacture them at a lower cost than when machining them. When the number of the thin tubes 3 to be connected is changed, the thin tube connecting members 4 having different numbers of the thin tube connecting holes 7 may be used, and even in that case, the distribution tube connecting member 5 can be used as a common component. .

Also, when the brazing 13 of the thin tube 3 is performed, the thin tube 3 made of copper may be brazed to the thin tube joining hole 11 of the mantle member 6 made of copper, so that the melting temperature may be low, and the number of thin tubes 3 is large. Even if the pitch between 3 and 3 is small, there is no risk of melting damage to the adjacent thin tubes 3, and the thin tubes 3 can be joined with good workability.

Further, since the thin tube 3 is connected to the thin tube connecting hole 7 formed in the thin tube connecting member 4 made of brass or the like through the thin tube connecting hole 11 formed in the outer jacket member 6, an accurate connection can be made and operation is possible. The medium can be evenly divided, and the distribution pipe connection member 5 is arranged in contact with the thin pipe connection member 4, and a communication chamber 10 that connects the distribution pipe connection hole 8 and each thin pipe connection hole 7 is formed on the contact surface. Therefore, the working medium flows smoothly from the flow pipe 2 to the thin tube 3 without causing stagnation in the outer jacket member 6, and the working medium can be evenly divided without a pressure drop.
Moreover, since it is only necessary to form the circular concave portion 9 on the one end surface of the flow pipe connecting member 5, it is possible to easily form the circular concave portion 9.

In the above embodiment, the thin tube connecting member 4 and the flow tube connecting member 5 are arranged and surrounded in the outer jacket member 6, but the flow tube connecting member 5 may be omitted in some cases. The flow pipe 2 may be inserted and connected to the flow pipe joining hole 12 of the outer jacket member 6 so that the working medium is diverted from the space in the outer jacket member 6 to each thin tube connection hole 7 of the thin tube connection member 4. However, in this case, the space in the mantle member 6 is inevitably large in volume to some extent, causing a slight stagnation in the flow of the working medium to cause a pressure drop, and in the case of a two-phase flow of gas and liquid, it becomes The liquid may not be evenly distributed.

Next, a flow divider according to a second embodiment of the present invention will be described with reference to FIG. In the following description of the embodiments, constituent elements common to the preceding embodiment will be designated by the same reference numerals, description thereof will be omitted, and only different points will be described.

In FIG. 2, a contact surface 14 is formed on the outer peripheral portions of the thin tube connecting member 4 and the flow tube connecting member 5, and a conical projecting portion 15 is provided at the center of the thin tube connecting member 4. A conical recess 16 is formed in the center of the flow pipe connecting member 5, and an annular communication chamber 17 having a V-shaped cross section is formed between the protrusion 15 and the recess 16. The thin tube connecting hole 7 is arranged so as to open on the inclined surface of the protruding portion 15 on the radially inner side of the contact surface 14, and the opening faces the communication chamber 17.

According to this embodiment, the conical protrusion 15 provided on the thin tube connecting member 4 and the conical concave portion 16 formed on the flow tube connecting member 5 form an annular communication chamber having a V-shaped cross section. 1
7, the working medium is passed from the flow pipe 2 to the thin pipe 3.
It is possible to divide the flow pipe connection member 5 evenly while smoothly flowing, and to change the axial length of the contact member 14a extending toward the contact portion 14 of the flow pipe connection member 5 so that the communication chamber 17 communicates with the communication chamber 17. The volume can be made to be the desired volume.

Next, a flow divider according to a third embodiment of the present invention will be described with reference to FIG.

In FIG. 3, at the center of the contact surface of the thin pipe connecting member 4 with the flow pipe connecting member 5, a thin pipe connecting hole 7 is provided with a conical protruding portion 18 opening to the slope thereof, and the flow pipe is provided. A concave portion 19 having a V-shaped cross section, in which a protruding portion 18 is fitted in the connecting member 5 and the flow pipe connecting hole 8 is opened at a central position
Are formed. Each thin tube connection hole 7 is individually connected to the distribution tube connection hole 8 by a radial communication groove 20 formed on the slope of the projecting portion 18.

According to this embodiment, a conical protrusion 18 and a recess 19 which are fitted to each other are formed in the thin pipe connecting member 4 and the flow pipe connecting member 5, and the communicating groove 20 formed on the slope of the protruding portion 18 is formed. Since each thin tube connection hole 7 is connected to the distribution tube connection hole 8 with each other, the working medium can be uniformly split while smoothly flowing from the distribution tube 2 to the thin tube 3 without causing stagnation. Even in the case of a two-phase flow of gas and liquid, it is possible to divide the flow evenly, and since it is sufficient to form the communication groove 20 on the outer surface of the protruding portion 18, it is possible to easily and accurately perform processing.

Next, a flow divider according to a fourth embodiment of the present invention will be described with reference to FIG.

In FIG. 4, the protruding portion 1 of the thin tube connecting member 4 is shown.
An annular recess 21 is formed in either one or both of the outer peripheral portion of the flow tube connecting member 8 and the outer peripheral portion of the recess 19 of the flow pipe connecting member 5 to form an annular relay chamber 22 facing the opening of the thin pipe connecting hole 7.
The distribution pipe connection hole 8 and the relay chamber 22 are connected by a plurality of spiral communication grooves 23 formed on the slope of the protruding portion 18, and the relay chamber 22 is filled with gas-liquid such as porous resin, wire mesh, or fine wire lumps. The net-like body 24 that does not hinder the passage of the

According to this embodiment, the annular relay chamber 22 facing the narrow pipe connection hole 7 is provided, and the spiral pipe communicating groove 23 is formed through the plurality of spiral communication grooves 23 formed on the slope of the protrusion 18. Since the working medium is allowed to flow into the relay chamber 22, it can be easily communicated with the relay chamber 22 even when the plurality of thin tube connection holes 7 are provided, and the spiral communication groove 23 can be connected to the relay chamber 22.
Even if the working medium is disturbed in the relay chamber 22 due to the inflow of the working medium through the passages and splits into a large number of thin tubes 3, even if the working medium is a two-phase flow of gas and liquid, the working medium can be split equally. it can.

Further, according to the present embodiment, since the mesh body 24 is housed in the relay chamber 22, the working medium which spirally flows into the relay chamber 22 through the spiral communication groove 23 is the same. The bubbles contained therein are finely pulverized and mixed into the liquid while passing through the mesh 24, so that the subsequent operability can be improved.

In the above embodiment, only an example in which an evaporator having a plurality of evaporators divides the flow into the thin tubes 3 connected to the respective evaporators, but the flow divider of the present invention is not limited to a single outdoor unit. It can also be applied to the case where the working medium is diverted to the indoor unit.

[0049]

According to claim 1 of the present invention, since the thin tube connecting member having the plurality of thin tube connecting holes formed therethrough is surrounded by the copper outer jacket member having good ductility, the number of thin tubes is reduced. At most, it can be manufactured easily and at low cost, and since the thin tube is connected to the thin tube connecting hole formed in the thin tube connecting member through the thin tube connecting hole formed in the outer member, accurate connection can be performed and it operates. The medium can be evenly divided, and when brazing the thin tubes, the thin tubes made of copper can be brazed to the thin tube joining holes of the copper outer member so that the melting temperature can be low and even if the pitch between the thin tubes is small The thin tubes can be joined with good workability without the risk of melting damage to the thin tubes.

According to the second aspect, the distribution pipe connecting member having the distribution pipe connecting hole formed in the outer member is disposed in contact with the thin pipe connecting member, and the communicating pipe connecting hole communicates with each thin pipe connecting hole. Since the working medium is formed, the working medium can smoothly flow from the flow pipe to the thin pipe without stagnation in the outer jacket member, and the working medium can be branched without a pressure drop, and the flow pipe connecting member can be formed. 5 and the thin tube connecting member 4 abutting this are surrounded by the outer jacket member 6, and the flow tube 2 and the thin tube 3 fitted into the flow tube connecting holes 8 and the thin tube connecting holes 7 at both ends of the outer jacket member 6 respectively. Since it is brazed to the outer jacket member 6, even if there is some leakage in the abutting portion or the fitting portion, these leaked gases do not leak to the outside, and good airtightness can be maintained as a whole.

According to the third aspect, the thin tube connecting member, or both the thin tube connecting member and the distribution tube connecting member are made of die-cast products, so that the cost can be further reduced as compared with the case where these are machined. Can be manufactured.

According to the fourth aspect of the present invention, since the communication chambers facing the circulation pipe connection holes and the respective thin pipe connection holes are formed on the contact surfaces of the thin pipe connection member and the distribution pipe connection member, a uniform flow distribution is ensured. However, the communication chamber can be easily formed and can be manufactured at low cost.

According to the fifth aspect of the present invention, since the conical projecting portion projecting from the thin pipe connecting member and the concave portion formed in the flow pipe connecting member form an annular communication chamber having a V-shaped cross section, The working medium can be made to flow more smoothly from the flow pipe to the thin pipe to be evenly divided.

According to the sixth aspect of the present invention, the thin tube connecting member and the flow tube connecting member are formed with conical projections and recesses which are fitted to each other, and each thin tube connecting hole is formed by a communicating groove formed on the slope of the projection. Since they are connected to the flow pipe connection holes, respectively, the working medium can be smoothly divided from the flow pipe to the thin pipe without causing any stagnation and can be evenly divided.
Even in the case of a phase flow, the flow can be evenly divided, and since it is sufficient to form the communication groove on the outer surface of the protruding portion, the work can be easily and accurately formed.

According to the seventh aspect of the present invention, an annular relay chamber facing the narrow pipe connecting hole is formed, and a plurality of spiral communicating grooves formed on the slant surface of the protrusion provided on the thin pipe connecting member form the flow pipe connecting hole. Since the relay chamber is connected, it can be easily communicated with the relay chamber even if it has a large number of thin tube connection holes, and the working medium is passed through the spiral communication groove formed on the slope of the conical protrusion with respect to the relay chamber. Since the working medium is disturbed in the relay chamber and splits into a large number of thin tubes, the working medium can be split evenly even if it is a two-phase flow of gas and liquid.

According to the eighth aspect, the working medium flowing in the relay chamber spirally through the spiral communication groove is finely pulverized while the bubbles contained therein pass through the mesh body, and is submerged in the liquid. Since it is mixed, the subsequent operability can be improved.

[Brief description of drawings]

FIG. 1 shows a flow divider according to a first embodiment of the present invention, (a) is a sectional view taken along the line AA of (b), and (b) is a left side view of (a).

2A and 2B show a flow divider according to a second embodiment of the present invention, wherein FIG. 2A is a sectional view taken along the line BB in FIG. 2B, and FIG. 2B is a sectional view taken along the line CC in FIG. .

3A and 3B show a flow distributor according to a third embodiment of the present invention, FIG. 3A is a longitudinal sectional view, and FIG. 3B is a left side view of FIG.

4A and 4B show a flow distributor according to a fourth embodiment of the present invention, FIG. 4A is a longitudinal sectional view, and FIG. 4B is a left side view of FIG.

FIG. 5 is an overall schematic configuration diagram of an air conditioner.

FIG. 6 shows a conventional flow divider, (a) is a left side view,
(B) is a vertical cross-sectional view taken along the line DD of (a).

FIG. 7 is a sectional view similar to FIG. 6B of another conventional flow divider.

FIG. 8 is a cross-sectional view similar to FIG. 6 (b) of another conventional flow divider.

[Explanation of reference numerals] 1 flow divider 2 medium flow pipe 3 narrow pipe 4 narrow pipe connecting member 5 flow pipe connecting member 6 outer jacket member 7 thin pipe connecting hole 8 flow pipe connecting hole 10 communicating chamber 11 narrow pipe connecting hole 12 flow pipe connecting hole 13 brazing 14 Contact Surface 15 Projection 16 Recess 17 Communication Room 18 Projection 19 Recess 20 Communication Groove 22 Relay Chamber 23 Spiral Communication Groove 24 Net

Claims (8)

[Claims] 1. A flow divider of an air conditioner, wherein a medium flow pipe for circulating a working medium to a condenser is connected to one end, and a plurality of thin pipes respectively connected to a plurality of evaporation sections are connected to the other end, A thin tube connecting member having a plurality of thin tube connecting holes penetrating and connecting the connecting ends of the respective thin tubes is formed, and a thin tube connecting hole corresponding to the thin tube connecting hole and a flow tube connecting hole for inserting the medium flow tube are formed. A shunt for an air conditioner, characterized in that it is surrounded by a copper jacket member, a thin tube is brazed to a thin tube joint hole, and a medium flow pipe is brazed to a flow pipe joint hole. 2. A distribution pipe connecting member, which is formed by penetrating a distribution pipe connecting hole for inserting and connecting a connecting end of a medium distribution pipe into the outer member, is arranged in contact with the thin pipe connecting member, and the distribution pipe connecting hole is formed. The flow divider of the air conditioner according to claim 1, wherein a communication portion that communicates with each thin tube connection hole is formed. 3. The flow divider for an air conditioner according to claim 1, wherein the thin tube connecting member, or both the thin tube connecting member and the distribution tube connecting member are made of die-cast products. 4. The air-conditioning system according to claim 2, wherein the contact surfaces of the thin pipe connecting member and the distribution pipe connecting member are formed with a communication chamber where the distribution pipe connecting hole and each thin pipe connecting hole face. Shunt. 5. A contact surface is formed on the outer peripheral portions of the thin tube connecting member and the flow tube connecting member, and a conical projecting portion is projectingly provided at the central portion of the thin tube connecting member so as to project at the central portion of the flow tube connecting member. The flow divider of the air conditioner according to claim 4, wherein a concave portion is formed between the portion and the portion to form an annular communication chamber having a V-shaped cross section. 6. A conical projecting portion having a narrow tube connecting hole opened to an inclined surface is projected from the contact surface of the thin tube connecting member with the flow tube connecting member, and the projecting portion is fitted to the flow tube connecting member. In addition, the flow pipe connecting hole is formed with a concave portion having a V-shaped cross-section opening at the central position, and each thin pipe connecting hole is connected to the flow pipe connecting hole by a communication groove formed on the slope of the protrusion. The shunt of the air conditioner according to claim 2 or 3. 7. An annular relay chamber facing the thin tube connecting hole is formed on the contact surfaces of the thin tube connecting member and the flow tube connecting member, and a conical projecting portion is projectingly provided inside the relay chamber of the thin tube connecting member. A plurality of recesses each having a V-shaped cross section in which the protrusion is fitted to the flow pipe connection member and the flow pipe connection hole is opened at a central position, and the flow pipe connection hole and the relay chamber are formed on the slope of the protrusion. The flow divider of the air conditioner according to claim 2 or 3, wherein the spiral communication grooves are connected. 8. The shunt of the air conditioner according to claim 7, wherein a mesh is housed in the relay chamber.