JP5338756B2 - Air conditioner refrigerant branching unit - Google Patents

Description

  The present invention relates to a refrigerant branching unit of an air conditioner that distributes refrigerant from an outdoor unit to a plurality of indoor units, and particularly relates to a configuration inside a main body and improvement of heat insulation.

The refrigerant branching unit that branches the refrigerant from the outdoor unit of the air conditioner to a plurality of indoor units is a branching unit that distributes the refrigerant from one outdoor unit to a plurality of indoor units as in the conventional example shown in FIG. , The branch pipe 1200 for branching and connecting the outdoor-unit-side refrigerant pipe 1000 to a plurality of indoor-unit-side branch refrigerant pipes 1100, and the refrigerant pipe 1000 and a part of the branch refrigerant pipe 1100 are hermetically sealed. It is configured by being housed in a case 2000, surrounded by a heat insulating material case 3000 made of two foams, and sandwiched between an upper case and a lower case covering the outer periphery. (See Patent Document 1)
In addition, the sealing case 2000 and the heat insulating material case 3000 are integrated, and the workability in the manufacturing process is improved and the internal sealing property and the heat insulating property are improved.

  When assembling the refrigerant branching unit according to the conventional example, the upper part and the lower part of the integrated sealing case 2000 and the heat insulating material case 3000 are aligned, and the screw hole 4000 in the edge 2100 provided at the joint is screwed. As shown in FIG. 2, the periphery 2100 of the closed casing 2000 is extended to the pipe outlet 1300 so that the periphery of the refrigerant outlet 1000 and the pipe outlet 1300 of the plurality of branch refrigerant pipes 1100 can be accessed by pipe installation work during construction. I can't put it out. Therefore, the screw hole 4000 is provided in the edge 2100 in front of the pipe outlet 1300. Since the sealing case 2000 and the heat insulating material case 3000 are integrated, the portion of the heat insulating material case 3000 that contacts the edge having the screw hole 4000 is It is necessary to provide a notch 3100 for the space of the tool for screwing the screw.

JP 2006-300380 A (FIG. 3)

However, since the heat insulating effect cannot be obtained unless the heat insulating material has a certain thickness, the thickness of the portion that becomes thinner at the notch 3100 of the heat insulating material case 3000 is required. As a result, the heat insulating material becomes thicker toward the inside of the main body 2210, and similarly, the sealed case 2000 protrudes into the main body inside 2210 to form the convex portion 2220, and the volume of the sealed inner 2210 becomes smaller, and the refrigerant branch unit is relatively Will increase in size.
In addition, since a heat insulating material is not provided around the screw and the screw hole 4000, and the screw hole 4000 to which the screw is fixed, there is a risk that the screw may be exposed if it is installed in a place subject to high temperature and high humidity such as the back of the ceiling. There is.

  In view of the above problems, the present invention is a refrigerant branch unit of an air conditioner that distributes refrigerant from an outdoor unit to a plurality of indoor units, and in particular, can secure the volume inside the main body and make the size of the main body compact, It aims at providing the refrigerant | coolant branch unit of the air conditioner from which the heat insulation improvement is obtained.

The present invention includes an outdoor unit-side refrigerant pipe, a plurality of indoor unit-side branch refrigerant pipes, a branch part that branches the refrigerant from the refrigerant pipe to the branch refrigerant pipe, and a main body part that houses the branch part. In the refrigerant branching unit
The main body includes an upper sealing case and a lower sealing case that draw out the refrigerant pipe and the branched refrigerant pipe from opposite sides, a heat insulating material case that covers the upper sealing case and the lower sealing case, and an upper case and a lower part that constitute an outer shell. A case and
The upper sealing case and the lower sealing case have an edge around the periphery, and the inside is sealed by fixing the edges to each other by a fixing means.
The heat insulating material case is configured to adhere to the upper sealing case, the lower sealing case, and the fixing means to obtain a heat insulating effect.

  According to the present invention, in the refrigerant branching unit of the air conditioner that distributes the refrigerant from the outdoor unit to the plurality of indoor units, particularly the volume inside the main body can be secured, the size of the main body can be made compact, and the heat insulation can be improved. The refrigerant branching unit of the air conditioner is obtained.

It is a schematic block diagram of the air conditioner of this invention. It is a perspective view of the refrigerant branch unit of the present invention. It is an exploded view of the refrigerant branching unit of the present invention. It is sectional drawing of the refrigerant | coolant branch unit of this invention. It is an internal block diagram of the refrigerant | coolant branch unit of this invention. It is a lower case and electrical component box exploded view of the refrigerant branching unit of the present invention. It is a piping acceptance part detail drawing of the refrigerant | coolant branch unit of this invention. FIG. 4 is an AA end view of FIG. 3 in the refrigerant branching unit of the present invention. It is a BB end view of Drawing 3 with a refrigerant branching unit of the present invention. FIG. 2 is a diagram of the refrigerant branching unit of the present invention with the electrical component box attached to the right side when viewed from the outdoor unit side, with the lower case removed, (A) looking up from below, and (B) bottom view. is there. FIG. 3 is a view of the refrigerant branching unit of the present invention with the electrical component box attached to the left side when viewed from the outdoor unit side, with the lower case removed, (A) looking up from below, (B) in bottom view. is there. It is a figure of the main-body part of the refrigerant | coolant branching unit of a prior art example.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated in detail as an Example based on an accompanying drawing.

<Air conditioner>
The air conditioner 1 shown in FIG. 1 includes one outdoor unit 11 and a plurality of indoor units 12, 13, and 14.
The outdoor unit 11 includes a part of a refrigerant circuit such as an outdoor heat exchanger, a compressor, and a four-way valve, and a fan that causes air to flow to exchange heat between the refrigerant in the outdoor heat exchanger and the outside air. A fan motor for driving, a control circuit (none of which is shown) for controlling the device, and the like are incorporated.
The indoor units 12, 13, and 14 are respectively a part of a refrigerant circuit such as an indoor heat exchanger, a fan that allows air to flow in order to exchange heat between the refrigerant in the indoor heat exchanger and room air, A fan motor for driving, a control circuit (none of which is shown) for controlling the device, and the like are incorporated.
The refrigerant circuit in the outdoor unit 11 and the refrigerant circuit in the indoor units 12, 13, and 14 are connected via the outdoor unit side pipe 110 and the indoor unit side pipes 120, 130, and 140, and the outdoor unit side pipe. A refrigerant branching unit 15 for equally branching the refrigerant from 110 to the indoor unit side pipes 120, 130, and 140 is installed between the outdoor unit 11 and the indoor units 12, 13, and 14.

<Refrigerant branch unit>
The refrigerant branching unit 15 in FIG. 2 connects the outdoor unit side pipe 110 and the indoor side pipes 120, 130, and 140, respectively, the branching pipe unit 2, the main body 150 that houses the piping unit 2, and the piping unit. It is comprised from the electrical component box 3 provided with the control part which controls 2 electrical components.

  The refrigerant branch unit 15 is suspended and fixed in a horizontal manner on the interior ceiling or the like by a ceiling suspension fitting 62. In order to cope with the environment behind the ceiling, which is likely to be hot and humid, the inside of the main body 150 has a heat insulating property so as not to be affected by temperature changes, and is sealed so as not to be affected by humidity. ing.

  2, 3, and 4, the piping unit 2 includes a refrigerant pipe 21 connected to the outdoor unit side pipe 110, a branching unit 25 housed in the main body 150, and indoor unit side pipes 120, 130, and 140. It is comprised by the branch refrigerant | coolant piping 22, 23, 24 connected, respectively.

The refrigerant pipe 21 includes a gas pipe 210 and a liquid pipe 211. The gas pipe 210 is provided with a gas pipe joint part 212 in the vicinity of the branch unit 15, and the liquid pipe 211 is provided with a liquid pipe joint part 213 in the vicinity of the branch unit 3, and the gas pipe joint part 212 and the liquid pipe joint part 213 provide an outdoor Connection to or removal from the machine-side piping 110 is possible.
The gas pipe 210 and the liquid pipe 211 are horizontally arranged in a state of being separated from each other by 40 mm or more, and are accommodated in the main body 150 from the refrigerant pipe receiving part 151.

  The branch refrigerant pipes 22, 23, and 24 include branch gas pipes 220, 230, and 240 and branch liquid pipes 221, 231, and 241, respectively. The branch gas pipes 220, 230, and 240 are respectively provided with branch gas pipe joint portions 222, 232, and 242 in the vicinity of the branch unit 15, and the branch liquid pipes 221, 231, and 241 are in front of the branch unit 3. 233, 243, and the branch gas pipe joint portions 222, 232, 242 and the branch liquid pipe joint portions 223, 233, 243 can be connected to and detached from the indoor unit side pipes 120, 130, 140, respectively. Become.

  The branch gas pipes 220, 230, and 240 are formed in a straight line, and the branch liquid pipes 221, 231, and 241 are arranged at a predetermined distance from the branch gas pipes 220, 230, and 240, and are located in front of the main body 150. Bending upward, the branch gas pipe 220 and the branch liquid pipe 221 become one, the branch gas pipe 230 and the branch liquid pipe 231 become one, and the branch gas pipe 240 and the branch liquid pipe 241 become one, respectively. The branch refrigerant pipes 22, 23, and 24 are bundled by the rubber bush 26 so as to be horizontally arranged in a state of being separated from each other by 40 mm or more, and are accommodated in the main body part 150 from the branch refrigerant pipe receiving part 152. .

<Branching part>
FIG. 5 is a view showing an internal configuration by removing a lower part of the main body 150 to be described later. The branch unit 25 of the pipe unit 2 includes a branch pipe 27 that branches the gas pipe 210 into branch gas pipes 220, 230, and 240, and branch gas pipe temperature sensors 224, 234 provided in the branch gas pipes 220, 230, and 240, respectively. 244, a flow divider 28 for diverting the refrigerant in the liquid pipe 211 to the branch liquid pipes 221, 231 and 241, and electronic expansion valves 225, 235 and 245 for adjusting the amount of refrigerant flowing in the branch liquid pipes 221, 231 and 241. The branch liquid pipe temperature sensors 226, 236, and 246 provided on the indoor units 12, 13, and 14 side of the electronic expansion valves 225, 235, and 245, and the open / close valve 29 that bypasses the refrigerant from the branch pipe 27 to the flow divider 28. It consists of and.

  The branch gas pipe temperature sensors 224, 234, 244 and the branch liquid pipe temperature sensors 226, 236, 246 are connected to signal lines for sending the detected results to the control board 30, and the electronic expansion valves 225, 235, 245 and the open / close valves Wires for driving the respective wires 29 are connected to each other, and a cable 80 in which signal lines and wires are bundled together is connected to the control board 30 of the electrical component box 3.

<Main body>
The main body 150 shown in FIG. 3 is configured such that the piping unit 2 is sandwiched between the sealed case 4, the heat insulating material case 5, and the case 6 in order from the inside.

<Sealed case>
In the sealed case 4, an upper sealed case 40 and a lower sealed case 41 are vertically divided along the center of the horizontal refrigerant pipe 21 and the branch refrigerant pipes 22, 23, and 24, and are formed of synthetic resin. .

The upper sealing case 40 shown in FIGS. 3 and 5 includes a storage part 400 that stores the branch part 25 of the piping unit 2, and an edge part 401 that is edged around the storage part 400 and maintains hermeticity.
In the edge 401, a refrigerant pipe receiving part 151 for receiving the refrigerant pipe 21 and a branch refrigerant pipe receiving part 152 for receiving the branch refrigerant pipes 22, 23, 24, and a pipe mounting part 402 in a semicircular shape to match the pipe shape It has been extended. Anchors 405 for attaching screws, which will be described later, are erected on the left and right ends of the pipe attachment portion.
A cable lead-out portion 403 that pulls out a cable (not shown) is also formed in a semicircular shape. Furthermore, the edge 401 is provided with two rows of convex ribs 404 so as to surround the storage portion 400. A heat insulating seal 44 (see FIG. 8) is stuck on the convex rib 404.
An anchor 405 that receives a screw, which will be described later, is erected at an interval from the convex rib 404 provided on the outer side of the two rows. Anchors 405 are also erected at the four corners of edge 401.

The lower sealing case 41 shown in FIG. 3 includes a storage portion 410 that stores the branching portion 25 of the piping unit 2 and an edge portion 411 that is edged around the storage portion 410 and maintains hermeticity.
In the edge portion 411, a pipe attachment portion 412 is formed in a semicircular shape at a portion in contact with the refrigerant piping 21 and the branch refrigerant piping 22, 23, 24, and a cable lead-out portion 413 for pulling out the cable 80 is semicircular. Is formed. The edge 411 is provided with a concave rib 412 that receives the convex rib 404. Furthermore, a screw hole 415 for screwing to the anchor 405 is provided.

<Insulation case>
The heat insulating material case 5 is formed of foamed polystyrene having excellent heat insulating properties, and has a certain thickness as a whole in order to improve the heat insulating properties.
In the heat insulating material case 5 shown in FIG. 3, portions corresponding to the refrigerant pipe receiving portion 151 and the branch refrigerant pipe receiving portion 152 protrude in a cylindrical shape, and are centered on the pipe diameters of the refrigerant pipe 21 and the branch refrigerant pipes 22, 23, 24. Along with this, an upper heat insulating material case 50 and a lower heat insulating material case 51 are divided.

  The upper heat insulating material case 50 is formed by matching the inner shape with the outer shape of the upper sealed case 40. Further, a cable drawing recess 500 is formed in accordance with the cable drawing portion 403 of the upper sealed case 40, and a cable side recess 501 for introducing the drawn cable 80 into the electrical component box 3 is formed on the left side as viewed from the outdoor unit side. Has been.

  The lower heat insulating material case 51 is formed by matching the inner shape with the outer shape of the lower sealed case 41. Further, a cable drawing recess 510 is formed in accordance with the cable drawing portion 413 of the lower sealed case 41, and a cable side recess 511 for introducing the drawn cable 80 into the electrical component box 3 is formed on the left side as viewed from the outdoor unit side. Has been. Further, a cable bottom surface recess 512 is provided on the bottom surface of the lower heat insulating material case 51. The cable bottom recess 512 is provided across the bottom surface of the lower heat insulating material case 51 so as to connect a first outlet 604 and a second outlet 605 of the lower case 51 described later.

<Case>
The case 6 constituting the outline of the main body 150 is formed by bending a sheet metal, and includes an upper case 60 and a lower case 61.

  The upper case 60 shown in FIG. 3 includes an outdoor unit side surface 60a, an indoor unit side surface 60b facing the outdoor unit side surface 60a, and a left first side surface 60c as viewed from the outdoor unit. And a right side surface portion 60d facing the first side surface portion 60c and a ceiling surface portion 60e.

  The outdoor unit side surface 60a and the indoor unit side surface 60b have lengths up to the center of the pipe diameters of the refrigerant pipe 21 and the branch refrigerant pipes 22, 23, and 24, respectively, and are cylindrical in the upper heat insulating material case 50. In addition, an upper heat insulating material receiving portion 600 cut into a semicircular shape is provided, and a screw hole is provided at the left and right ends so that a ceiling suspension fitting 62 for suspending the refrigerant branching unit 2 from the ceiling can be screwed. A screw hole is provided so that the hanging metal fitting 63 can be screwed.

  The first side surface portion 60c and the second side surface portion 60d have a length that reaches the bottom surface of the main body, and the electrical component box 3 is attached to the upper and lower ends of the left and right ends by the electrical component box locking claws 320 described later. An electrical component box locking hole 601 for mounting is provided. A dowel 602 that is detachably locked to a dowel hole 612, which will be described later, is provided below the position of the electrical component box lock hole 601 provided below the left and right ends. In addition, a screw mounting portion 603 is provided below the dowel 602 so as to go around to the bottom surface.

The first side surface portion 60c has a first cable outlet 604 formed by a notch groove on the outdoor unit side to the vicinity of the ceiling surface. The second side surface portion 60d shown in FIG. 6 has a second side surface portion on the outdoor unit side. There is a second cable outlet 605 which is a notch groove in the middle of 60d.
A cable outlet cover hole 606 for locking a cable outlet cover 64 described later is provided on the ceiling surface portion 60e side in the vicinity of the first cable outlet 604 and the second cable outlet 605.

The lower case 61 has a U-shape including an outdoor unit side surface 61a, an indoor unit side surface 61b facing the outdoor unit side surface 61a, and a bottom surface 61e.
The outdoor unit side surface 61a and the indoor unit side surface 61b have lengths up to the center of the pipe diameters of the refrigerant pipe 21 and the branch refrigerant pipes 22, 23, and 24, respectively. An upper heat insulating material receiving portion 610 cut out into a semicircular shape is provided.
The sheet metal that forms the lower case 61 includes a flange portion 611 that is partially bent from the bottom surface portion 61e and bent, and is joined by spot welding to the outdoor unit side surface portion 61a and the indoor unit side surface portion 61b. ing.
The flange portion 611 is provided with a dowel hole 612 so that the dowel 602 is detachably locked when the lower case 61 is assembled. The bottom surface portion 61e adjacent to the dowel hole 612 is provided with a screw hole.

<Electrical component box>
The electrical component box 3 shown in FIGS. 3 and 6 includes a control board 30 that controls the refrigerant branching unit 15, an electrical component box body 31, an electrical component box mounting plate 32, and an electrical component box cover 33. Yes.
The electrical component box body 31 is made of a U-shaped sheet metal, and the control board 30 and a plurality of terminal blocks 34 are arranged inside the U-shape. A part of the electrical component box main body 31 is provided with a cable introduction hole 310 for introducing the cable 80. The cable 80 is bound to the electrical component box main body 31 and guided to the control board 30 inside the proximity of the cable introduction hole 310. A cable introduction guide 311 is provided.
The electrical component box mounting plate 32 has a rectangular shape, and has electrical component box locking claws 320 bent in two symmetrically in the vertical direction, and has two left and right ends on the outer side of the electrical component box body 31. It is welded to.

<Assembly method>
The refrigerant branching unit 15 is assembled by reversing the top and bottom from the installation state suspended from the ceiling. First, the ceiling surface portion 60e of the upper case 60 is placed downward, and the upper heat insulating material case 50 is stacked therein. The upper heat insulating material case 50 is supported by the heat insulating material receiving portion 600 of the upper case 60.

Next, as shown in FIGS. 3, 5, and 7, the upper sealed case 40 is fitted into the upper heat insulating material case 50. Then, the portions of the pipe unit 2 where the rubber bushing 26 of the gas pipe 210, the liquid pipe 211 and the branch refrigerant pipes 22, 23, 24 are wound are fitted into the pipe mounting portion 402 of the upper sealed case 40, and the pipe retainer 91 is attached. The rubber bushing 26 is fastened and fixed to the pipe mounting portion 402 with screws 94.
Next, as shown in FIG. 7 and FIG. 8, the pipe attachment fitting 402 of the gas pipe 210 and the branch refrigerant pipe 23 is provided with a pipe hanging bracket 63 whose upper end is screwed to the upper case 60. The pipe suspension 91 and the pipe retainer 91 are collectively fastened with screws 94 and fixed to the upper sealed case 40.
The cables 80 are bundled together by a binding tool 82 and pulled out from the cable receiving portion 403 of the upper sealed case 40.

  With this configuration, when the piping unit 2 is fixed to the upper case 40 with the piping hanging metal fitting 63, the refrigerant branching unit 15 is suspended from the ceiling, and then the internal piping, the electronic expansion valve, etc. are maintained. In other words, by removing the lower case 61, the lower heat insulating material case 51, and the lower sealing case 41, the piping unit 2 appears, and maintenance can be performed without disassembling the refrigerant branching unit 15.

Next, the sealing case locking hole 416 of the lower sealing case 41 is inserted in accordance with the sealing case locking claw 406 protruding from the upper sealing case 40. When the upper sealing case 40 and the lower sealing case 41 are combined, as shown in FIG. 9, the concave rib 414 of the lower sealing case 41 is in close contact with the convex rib 404 of the upper sealing case 40 with a heat insulating seal 44 therebetween. . Next, screws 94 are screwed into the anchors 405 at a plurality of positions on the edge 401 from the screw holes 415.
As shown in FIG. 7, the pipe mounting portion 412 of the lower sealed case 41 is fitted into the rubber bush 26 of the gas pipe 210 and the liquid pipe 211 that are housed in the upper sealed case 40, and is connected to the pipe mounting section 402 of the upper sealed case 40. Since it is configured so as not to cover, the upper sealing case 40 and the lower sealing case 41 are overlapped without any gap, and the inside is sealed.
Since the inside is in a sealed state, the piping unit 2 is not exposed to air, and the generation of drain water can be prevented.

  Next, the lower heat insulating material case 51 is put on the lower airtight case 41. At this time, in addition to the lower sealing case 41, the pipe retainer 91 and the screw 94 screwed to the pipe hanging fitting 63 are also attached to the lower heat insulating material case 51. Thus, as in the conventional example, without forming the convex portion 2220 protruding into the sealed inside of the sealed case 2000 by the notch 3100 for the space of the tool to which the screw of the heat insulating material case 3000 is screwed, The volume can be secured, the size of the main body can be made compact, and exposure to the screw can be prevented.

  The electrical component box 3 is attached to both the first side surface portion 60c and the second side surface portion 60d of the upper case 60. When attached to the second side surface portion 60d on the right side when viewed from the outdoor unit side, as shown in FIGS. 10A and 10B, the cable 80 is connected to the recessed portion 500 for drawing out the upper heat insulating material case and the lower heat insulating material case. And led to the cable bottom recess 512. The cable 80 guided to the cable bottom recess 512 is folded back at the cable bottom recess 512 and drawn out of the main body 150 from the second cable outlet 605. As shown in FIG. 6, the drawn cable 80 is introduced into the electrical component box 3 from the cable introduction hole 310 of the electrical component box body 150, and is bundled with the electrical component box body 31 by the cable introduction guide 311. Are connected to a plurality of connectors (not shown) on the control board 30. The electrical component box main body 31 connected to the cable 80 is connected to the electrical component box retaining plate 320 of the electrical component box mounting plate 32 welded to the electrical component box main body 31, and the electrical component box locking hole of the upper case 60. Plug in 601. At this time, the electrical component box locking claws are temporarily fixed with the upper claws hanging. Next, the upper case 60 is screwed into the upper case 60 from the inside of the electrical component box body 31. As a result, the electrical component box 3 temporarily fixed by the electrical component box locking claws 320 is fixed. An electrical component box cover 33 is placed thereon.

Further, as shown in FIGS. 11A and 11B, when mounting on the first side surface portion 60c on the left side when viewed from the outdoor unit side, the electrical component box main body 31 is turned upside down and the electrical component box mounting plate 32 is mounted. The electrical component box locking claws 320 are inserted into the locking holes 601 of the upper case 60. By reversing the electrical component box body 31 upside down, the cable introduction hole 310 moves to the ceiling side.
The cable 80 guided to the cable bottom recess 512 crosses the cable bottom recess 512, passes through the cable side recesses 501 and 511, and is drawn out of the main body 150 from the upper side of the first cable outlet 604. It is introduced into the electrical component box from the cable introduction hole 310 of the product box body 150.
With this attachment method, for example, even when the electrical component box 3 is replaced according to the place to be installed at the time of construction, the cable 80 can be easily replaced while being connected.

  Next, the cable outlet cover 64 is attached to either the first cable outlet 604 or the second cable outlet 605 on the side where the electrical component box 3 is not installed. The cable outlet cover 64 is formed longer than the first cable outlet 604, and the cable outlet cover hole 606 is also provided at a symmetrical position between the first side surface portion 60c and the second side surface portion 60d. The outlet cover 64 is attached to either side. The upper claw of the cable outlet cover 64 is engaged with the cable outlet cover hole 606 of the upper case 60 and screwed with a screw. As a result, the cable outlet can be concealed, the aesthetics are improved, and dust can be prevented from entering the interior.

Next, the lower case 61 is assembled to the upper case 60. At that time, the lower case 61 is temporarily fixed by engaging the dowel 602 provided in the upper case 60 with the dowel hole 612 provided in the lower case 61. Next, the upper case 60 and the lower case 61 are fixed by screwing the screws 94 to the screw attaching portions 603 on the upper case 60 and the bottom surface 61e.
At the time of maintenance work, the screw 94 screwed to the screw mounting portion 603 is removed. At this time, even if the screw 94 is removed, the lower case 61 is temporarily fixed because the dowel 602 is engaged with the dowel hole 612. Therefore, there is no possibility that the lower case 61 will drop unexpectedly.
Since the dowel 602 is temporarily fixed by the dowel hole 612, a temporary fixing function can be provided without providing new parts.

  As described above, according to the present invention, in the refrigerant branching unit of the air conditioner that distributes the refrigerant from the outdoor unit to the plurality of indoor units, the volume of the main body can be particularly secured and the size of the main body can be made compact. At the same time, the refrigerant branch unit of the air conditioner can be improved in heat insulation.

DESCRIPTION OF SYMBOLS 1 Air conditioner 11 Outdoor unit 12, 13, 14 Indoor unit 15 Refrigerant branch unit 2 Piping unit 21 Refrigerant piping 22, 23, 24 Branched refrigerant piping 3 Electrical component box 40 Upper sealing case 41 Lower sealing case 50 Upper heat insulation case 51 Lower heat insulating material case 60 Upper case 61 Lower case 63 Piping hanging bracket 80 Cable 91 Piping presser 94 Screw

Claims (1)

Refrigerant branching unit comprising an outdoor unit side refrigerant pipe, a plurality of indoor unit side branch refrigerant pipes, a branch part for branching the refrigerant from the refrigerant pipe to the branch refrigerant pipe, and a main body part for storing the branch part In
The main body includes an upper sealing case and a lower sealing case that draw out the refrigerant pipe and the branched refrigerant pipe from opposite sides, a heat insulating material case that covers the upper sealing case and the lower sealing case, and an upper case and a lower part that constitute an outer shell. A case and
The upper sealing case and the lower sealing case have an edge around the periphery, and the inside is sealed by fixing the edges to each other by a fixing means.
The air conditioner refrigerant branching unit according to claim 1, wherein the heat insulating material case is attached to the upper sealing case, the lower sealing case, and the fixing means to obtain a heat insulating effect.

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