JP5494705B2 - Two-way blowout ceiling air conditioner - Google Patents

Description

  The present invention relates to a two-way blowing type ceiling-embedded air conditioner, and more particularly to the structure of an indoor heat exchanger.

  As a conventional ceiling-embedded air conditioner, there are a four-way blowing type in which a blower outlet is formed along four sides of the lower surface of the decorative panel attached to the ceiling surface, and a blower along two opposing sides of the lower surface of the decorative panel. A two-way blowing type (double flow type) provided with an outlet is used. The latter two-way blowout type ceiling-embedded air conditioner is provided along the long side where the interior outlet is opposed to the rectangular shape of the decorative panel in order to harmonize with the interior design. There are many things that have been made.

  A conventional example of such a two-way blowing type ceiling-embedded air conditioner is disclosed in Patent Document 1, for example. This will be described with reference to FIG. In such a two-way blowing type ceiling-embedded air conditioner, as shown in this figure, an indoor heat exchanger 102 and a turbo are placed in a rectangular parallelepiped product main body 101 as viewed in plan. A fan 103 is incorporated. The indoor heat exchanger 102 is usually composed of two branch heat exchangers 104. The two branch heat exchangers 104 are respectively arranged inside the longitudinal side walls in the product main body 101, and are formed with the turbo fan 103 interposed therebetween. The turbo fan 103 is generally disposed on a center line 105 extending in the longitudinal direction of the product main body 101. Further, in this example, the two branch heat exchangers 104 are bent toward the blower side, that is, the center line side so that an obtuse angle is formed at the central portion in the longitudinal direction when seen in a plan view. It is formed in a mountain shape. The reason why the indoor heat exchanger 102 is formed in a mountain shape is that the longitudinal dimension of the branch heat exchanger 104 is made as long as possible in order to make the heat exchange area of the indoor heat exchanger 102 as large as possible. Is.

JP 2003-287239 A

  However, from the viewpoint of increasing the heat exchange area of the indoor heat exchanger 102 as much as possible, there is still room for improvement. That is, in the conventional air conditioner, the two branch heat exchangers 104 are symmetrically sandwiched between the turbofan 103 inside the side wall on the side where the two opposing long sides exist in the product body 101 having a rectangular parallelepiped shape. However, by changing the shape, the longitudinal dimension of the branch heat exchanger 104 can be further increased. When the longitudinal dimension of the branch heat exchanger 104 is increased to increase the heat exchange area in this way, it is important to consider not to lower the productivity by using an unreasonable shape and structure. .

  From the above viewpoint, the present invention is a two-way blowout type ceiling-embedded air conditioner in which the heat exchange area of the indoor heat exchanger can be as large as possible while considering not to lower the productivity. The purpose is to provide.

A two-way blowing type ceiling-embedded air conditioner according to the invention described in claim 1 includes a decorative panel provided with an indoor air outlet that blows out temperature-controlled air into the room and an indoor air inlet that sucks in indoor air; A two-way blowout ceiling-embedded air conditioner having a rectangular planar shape, comprising a rectangular parallelepiped product main body incorporating a blower and an indoor heat exchanger, wherein the decorative panel includes two opposing panels Two indoor outlets are formed along the long side, the blower is a centrifugal blower arranged in the product body with the rotation axis as a vertical direction, and the indoor heat exchanger is seen in a plan view. And two branched heat exchangers arranged between the two indoor outlets and the blower and formed in a symmetrical shape with the blower sandwiched therebetween, and these branched heat exchanges The vessel is branched in the longitudinal direction A first end on the side where the refrigerant pipe outside the branch heat exchanger is connected to the refrigerant passage in the exchanger, an intermediate portion, and a second end opposite to the first end where the refrigerant passage is folded back. The intermediate portion is formed in parallel with the indoor outlet, and the first end portion and the second end portion are each bent toward the blower side, and The first end portion and the second end portion are formed to have different bending angles with respect to the intermediate portion, and the shunt pipe is formed at the first end portion of both branch heat exchangers in plan view. The outermost line connecting the outermost positions in the longitudinal direction to each other and the branch heat exchanger side facing the line perpendicular to the air passage surface from the edge of the first end side of the air passage part in both branch heat exchangers The pipe is processed in a substantially triangular area formed by two lead lines drawn to It is characterized in.
Here, the outermost position in the longitudinal direction at the first end is a communication pipe that connects the heat exchange tubes constituting the refrigerant passage in the branch heat exchanger at the first end, for example, a U-shaped bent pipe. The position located on the outermost side.

According to the above configuration, since both ends of each branch heat exchanger are bent toward the blower, branch heat exchange is performed as compared with the above-described conventional two-way blowing type ceiling-embedded air conditioner. The length in the longitudinal direction of the vessel can be lengthened, thereby increasing the heat exchange area of each branch heat exchanger. In addition, since the bending angles of the first end portion and the second end portion constituting both ends of the bent branch heat exchanger are not necessarily the same, the dimensions of the product main body, the branch heat In consideration of the relationship between the gripping margin of the bending bender of the exchanger and the bending length of both ends, the convenience of the piping connection process to the branch heat exchanger, etc., the bending angle with respect to the intermediate portion at both ends is arbitrarily set Can be set. Thereby, the bad effect on manufacture of a branch heat exchanger can be avoided. In addition, since the piping space of the shunt pipe connecting from the shunt to the two branch heat exchangers does not protrude to the side of the outermost line of the split heat exchanger, the air flow passing through the heat exchanger The air conditioner can be compactly formed without increasing the size of the product main body while maintaining the position where the flow of air is not hindered.

According to a second aspect of the present invention, in the two-way blowing type ceiling-embedded air conditioner according to the first aspect , the indoor heat exchanger includes a plurality of refrigerants derived from the two branch heat exchangers. The outlet pipe is configured to be connected to one header.

  According to the above configuration, since the plurality of refrigerant outlet pipes led out from both the branch heat exchangers are connected to one header, the header required for each of the branch heat exchangers is essentially completed with one component. Can do. Therefore, the space required for the header can be minimized, and the air conditioner can be formed compactly.

According to a third aspect of the present invention, there is provided the two-way blow-out type ceiling-embedded air conditioner according to the first or second aspect , wherein the blower has a longitudinal position in the product main body at the second end portion. It is characterized by being biased to the side.
According to the said structure, since the air blower is biased and arrange | positioned in the said product main body at the said 2nd edge part side, rather than the space between an air blower and the said 2nd edge part, an air blower and the said 1st edge part. The space between can be increased. This larger space can be utilized as a wiring space for connecting the electrical component box and the electrical components. In particular, electrical components such as a drain pump are often connected near the first end portion, which is convenient for connecting these electrical components.

The invention described in claim 4 is the two-way blowing type ceiling-embedded air conditioner according to any one of claims 1 to 3 , wherein the blower is constant in the longitudinal direction in the product body. Two of them are arranged at an interval, and the middle point of these two blowers is arranged to be biased toward the second end portion side.

  According to the above configuration, the two blowers are arranged in the product main body so as to be biased toward the second end portion, and therefore, more than the space between one of the two blowers and the second end portion. A space between the other of the two blowers and the first end can be increased. This larger space can be effectively used as a wiring space for connecting the electrical component box and the electrical components. In particular, electrical components such as a drain pump are often connected near the first end portion, which is convenient for connecting these electrical components.

According to the present invention, the longitudinal dimension of the branch heat exchanger is made longer than that of the conventional two-way blowing type ceiling-embedded air conditioner, thereby increasing the heat exchange area of each branch heat exchanger. Can be made. In addition, the bent angles at both ends of the bent branch heat exchanger are not necessarily the same, but are different, so the dimensions of the product body, the gripping margin of the bending bender of the branch heat exchanger, and the bending at both ends The bending angle with respect to the intermediate portion at both ends can be arbitrarily set in consideration of the relationship with the length and the convenience of the piping connection process with respect to the branch heat exchanger. Thereby, the bad effect on manufacture of a branch heat exchanger can be avoided. In addition, since the piping space of the shunt pipe connecting from the shunt to the two branch heat exchangers does not protrude to the side of the outermost line of the split heat exchanger, the air flow passing through the heat exchanger The air conditioner can be compactly formed without increasing the size of the product main body while maintaining the position where the flow of air is not hindered.

1 is an external perspective view of a two-way blowing type ceiling-embedded air conditioner according to Embodiment 1 of the present invention. It is the plane sectional view showing device arrangement inside the product main part in the ceiling embedding type air conditioner. It is side sectional drawing which showed the apparatus arrangement | positioning inside the ceiling embedded type air conditioner. It is an enlarged view of the edge part by the side which connects the piping of the indoor side heat exchanger in the same ceiling-embedded air conditioner. FIG. It is the state figure which attached the indoor side heat exchanger to the brazing jig. It is state explanatory drawing in the case of brazing to the 1st end part of the side which connects the external refrigerant | coolant piping in the indoor side heat exchanger of the same state. It is the plane sectional view which showed apparatus arrangement | positioning inside the product main body in the two-way blowing type ceiling-embedded air conditioner which concerns on Embodiment 2 of this invention. It is the plane sectional view which showed the apparatus arrangement | positioning inside the product main body in the two-way blowing type ceiling-embedded air conditioner which concerns on a prior art example.

(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS.
The ceiling-embedded air conditioner according to Embodiment 1 is a two-way blowing-type ceiling-embedded air conditioner, and constitutes an indoor unit in a separate air conditioner.

  As shown in FIGS. 1 and 3, the two-way blowing type ceiling-embedded air conditioner is a ceiling-embedded air conditioner having a rectangular planar shape, and includes a decorative panel 10 and the decorative panel. 10 and a product main body 20 connected to the upper side. The decorative panel 10 is attached below the product body 20 so as to sandwich the ceiling material 1 (see FIG. 3), and the product body 20 is attached so as to be suspended from a building structural member (not shown) on the ceiling. . Both the decorative panel 10 and the product main body 20 have a rectangular planar shape, but the product main body is a slightly smaller rectangle like the conventional one.

  As shown in FIGS. 1 and 3, the decorative panel 10 is formed with an indoor outlet 11 that blows out temperature-adjusted air along two opposing long sides. Further, an elongated indoor inlet 12 for sucking indoor air is formed inside the indoor outlet 11.

As shown in FIG. 2, the product main body 20 includes a blower 30, an indoor heat exchanger 40 and the like in a box-shaped main body casing 21 having a rectangular parallelepiped shape.
The blower 30 is a centrifugal blower, more specifically a turbo fan, disposed in the product main body (20) with the rotation axis as a vertical direction. As shown in FIG. 2 , the blower 30 is attached so that the rotation axis is positioned on a center line CL extending in the longitudinal direction of the product main body 20 when viewed in plan. The blower 30 is configured to be rotated in the direction of the rotation arrow shown in FIG. 2 by a drive motor 32 attached to the top plate of the main body casing 21. Further, the blower 30 is configured so that the shroud 33 is a lower surface, air is sucked from an opening on the inner peripheral side of the shroud 33, and the pressurized air is blown out from the outer periphery of the impeller 31. The blower 30 has a bell mouth 34 so as to communicate with the shroud 33. The bell mouth 34 is configured to communicate with the indoor air inlet 12 via the air filter 22 disposed on the lower surface in the product main body 20 and the internal space 13 of the decorative panel 10.

  The indoor heat exchanger 40 includes two branch heat exchangers 41 disposed between the two indoor outlets 11 and the blower 30 when viewed in plan. Therefore, each branch heat exchanger 41 is disposed at a position on the blowing side of the blower 30.

  The branch heat exchanger 41 is a plate fin coil in which plate fins 43 are attached to a U-shaped heat exchange tube 42 (see FIG. 4) that constitutes a refrigerant passage component. Each branch heat exchanger 41 has two rows and sixteen stages as can be seen from FIGS. 4 and 5, and each has a seven-pass refrigerant passage.

Further, as shown in the plan sectional view of FIG. 2, the branch heat exchanger 41 has an intermediate portion 41 a formed in parallel with the indoor air outlet 11 as viewed in the longitudinal direction, and both ends at the fan 30 side. In other words, it is bent toward the center line CL. In the following description, the end on the side where the refrigerant pipe outside the branch heat exchanger 41 is connected to the refrigerant passage in the branch heat exchanger 41 is referred to as a first end 41b, and the refrigerant passage in the branch heat exchanger 41 is An end portion on the opposite side of the first end portion 41b to be folded is referred to as a second end portion 41c. The plate fin coil in the present embodiment will be specifically described. The end on the side where the external refrigerant pipe is connected to the U-shaped heat exchange tube 42 is a first end 41b, and the U of the heat exchange tube 42 is U. The end on the side where the character portion is arranged is referred to as a second end 41c. Thus, each branch heat exchanger 41 has a first end portion 41b bent toward the blower 30 side, an intermediate portion 41a, and a second bent toward the blower 30 side in the longitudinal direction. It is divided into an end portion 41c.

  The bending angle α of the first end portion 41b with respect to the intermediate portion 41a and the bending angle β of the second end portion 41c with respect to the intermediate portion 41a are 90 degrees in the sense of increasing the longitudinal dimension of the branch heat exchanger 41. However, in order to satisfy the conditions required for production, the angle is set to a different angle smaller than 90 degrees.

  The bending angle α of the first end portion 41b of the branch heat exchanger 41 is formed at about 45 degrees in order to facilitate the operation of brazing the pipe to the heat exchange tube 42. The bending angle α is synonymous with the angle with respect to the center line CL because the intermediate portion 41a is formed substantially parallel to the center line CL.

  The bending angle β of the second end portion 41c of the branch heat exchanger 41 is required for the length of the bent second end portion 41c to hold the bender used for forming the second end portion 41c. The length is longer than that. And while ensuring this length, the 2nd end part 41c can take the largest angle with respect to the intermediate part 41a. In this embodiment, the bending angle β of the second end portion 41c is formed at about 60 degrees. Since the bent first end portion 41b has a bending angle α of 45 degrees, the bent first end portion 41b has a sufficient length necessary for the gripping margin of the vendor. Further, the bending angle α of the second end portion 41c is synonymous with the angle with respect to the center line CL because the intermediate portion 41a is formed substantially parallel to the center line CL.

The product main body 20 includes a drain pan 50 below the indoor heat exchanger 40.
In the drain pan 50, a portion directly below the branch heat exchanger 41 is formed in a groove 51 for receiving drain water from the branch heat exchanger 41. Further, the drain pan 50 is connected to a portion other than the groove portion 51 in order to serve as a partition member that partitions the blowing side and the suction side of the blower 30. This portion is referred to as a partition plate combined portion 52 in this specification. However, as shown in FIG. 3, the partition plate portion 52 is formed such that a round hole 53 is opened at a portion where the bell mouth 34 is attached, and the air filter 22 and the bell mouth 34 communicate with each other. Further, as shown in FIG. 2 and FIG. 3, the partition plate combined portion 52 is elongated so as to communicate with the indoor outlet 11 of the decorative panel 10 below the space between the branch heat exchanger 41 and the side wall. The square hole 54 is formed.

Next, the configuration of the branch heat exchanger 41 on the first end 41b side will be further described.
As shown in FIG. 2, on the first end 41b side of the branch heat exchanger 41, it is related to refrigerant pipe connection with equipment constituting the refrigerant circuit around the indoor heat exchanger 40 and an outdoor unit (not shown). Equipment that drains drain water, etc. are arranged. Specifically, around the indoor heat exchanger 40, a flow divider 61 for diverting the liquid refrigerant conveyed from the outdoor unit, and the refrigerant diverted by the flow divider 61 is conveyed to each branch heat exchanger 41. There are arranged a plurality of flow dividing pipes 62, a plurality of refrigerant outlet pipes 63 for letting out the gas refrigerant from the branch heat exchanger 41, and a header 64 for collecting the refrigerant outlet pipes 63. Further, a liquid side pipe joint 65 and a gas side pipe joint 66 for connecting a communication pipe (not shown) to the outdoor unit are attached to the side plate of the main body casing 21. Furthermore, a drain water level sensor 67 for detecting the level of drain water stored in the drain water storage section of the drain pan 50, a drain pump 68 for draining the accumulated drain water, and drain water pumped out by the drain pump 68 A discharge pipe 68a for discharging, a pipe joint 69 for connecting this to a drain pipe outside the machine, and the like are arranged.

  Since each of the branch heat exchangers 41 has seven paths for the refrigerant passage, seven branch pipes 62 are connected to each branch heat exchanger 41 from the distributor 61. The shunt pipe 62 is drawn from both the branch heat exchangers 41 and the outermost line 45 that connects the outermost positions in the longitudinal direction of the first end portions 41 b of the two branch heat exchangers 41 in a plan view. The piping is processed in a substantially triangular region formed by the two lead lines 46 and 47.

  The outermost line 45 of the indoor side heat exchanger 40 is defined as follows. In the branch heat exchanger 41, connecting pipes that connect the refrigerant passage are attached to a plurality of locations of the first end portion 41b so that the refrigerant passage in the branch heat exchanger 41 has a predetermined length and route. Therefore, the outermost line 45 related to the indoor heat exchanger 40 is a line connecting the outermost positions of such connecting pipes in the two branch heat exchangers 41 facing each other. This embodiment will be described in more detail. The branch heat exchanger 41 includes a heat exchange tube that forms a refrigerant passage so that the refrigerant passage has a predetermined length and arrangement at a plurality of locations of the first end portion 41b. A U-shaped bending tube 48 that communicates between 42 is attached. The outermost line 45 related to the indoor heat exchanger 40 means a line connecting points located on the outermost side of the bent pipe 48.

  Further, the two lead lines 46 and 47 are perpendicular to the air passage surface drawn out from the end edge on the first end portion 41b side of the air passage portion in both the branch heat exchangers 41 to the opposite branch heat exchanger 41 side. It is a line. In this embodiment, the end edge of the air passage portion on the first end portion 41 b side is a tube plate on the first end portion 41 b side in the branch heat exchanger 41. Therefore, more specifically, the lead lines 46 and 47 mean lines obtained by extending the surface of the tube sheet.

  The two branch heat exchangers 41 are configured to lead out seven refrigerant outlet pipes 63 because the refrigerant passages are formed in seven paths. Further, as shown in FIG. 5, these refrigerant outlet pipes 63 are led out from the first end portions 41 b of the respective branch heat exchangers 41, and the tip ends thereof with respect to one header 64 on the respective branch heat exchanger 41 side. Connected from. In the present invention, the piping outside the branch heat exchanger 41 connected to the refrigerant passage in the branch heat exchanger 41 refers to the aforementioned branch pipe 62 and the aforementioned refrigerant outlet pipe 63.

Further, in the product main body 20, the blower 30 is disposed so as to be biased toward the second end portion 41c.
Thereby, the space between the air blower 30 and the 1st end part 41b of the branch heat exchanger 41 is larger than the space between the air blower 30 and the 2nd end part 41c of the branch heat exchanger 41. FIG. Further, an electrical component box 71 is disposed below the partition plate portion 52 in the drain pan 50 in the enlarged space. Then, using this space, electrical components such as the drain pump 68 and the drain water level sensor 67 arranged on the side to which the piping of the branch heat exchanger 41 is connected become electrical components in the electrical component box 71. It is connected.

Next, the operation of the two-way blowing type ceiling-embedded air conditioner configured as described above will be described.
First, the air conditioning operation in the ceiling-embedded air conditioner according to the present embodiment will be described.

  This ceiling-embedded air conditioner is air-conditioned by operating a compressor mounted in an outdoor unit (not shown) and a blower 30 housed in the product main body 20. When the air conditioning operation is started, the room air is circulated as shown by the white arrows in FIG. Specifically, the indoor air is sucked from the indoor suction port 12 and sucked into the blower 30 through the internal space 13 of the decorative panel 10 and the air filter 22. The temperature of the air blown out from the outer periphery of the blower 30 is adjusted by being dispersed and passing through the two branch heat exchangers 41 facing each other. Then, the temperature-adjusted air is blown into the room from the indoor air outlet 11 through an elongated rectangular hole 54 formed in the side of the drain pan 50.

  Further, in the case of the cooling operation in this air conditioning operation, the liquid refrigerant conveyed from the outdoor unit (not shown) through the liquid side fitting 65 flows as shown by the solid line arrow in FIG. Is shunted by. The refrigerant divided by the flow divider 61 is equally divided into the refrigerant passages of the branch heat exchanger 41 by the flow dividing pipe 62. Then, the gas refrigerant that is vaporized by passing through each refrigerant passage and being heat-exchanged with the indoor air is gathered in the header 64 via the refrigerant outlet pipe 63, and the gas refrigerant is connected to the outdoor unit via the gas side pipe joint 66. Returned to In addition, when this air conditioner is comprised as a heat pump type and heating operation is carried out, although a refrigerant | coolant is distribute | circulated to the reverse direction, the description about the detail is abbreviate | omitted here.

  Further, the performance of the indoor heat exchanger in such air conditioning operation is larger than that of the conventional example described at the beginning. As described above, the shape of the branch heat exchanger 41 is formed such that the intermediate portion 41a in the longitudinal direction is formed in parallel with the indoor outlet 11 and both end portions are bent toward the blower 30 side. This is because the longitudinal dimension of the branch heat exchanger 41 that can be mounted on the product body 20 is made longer than that of the conventional example, and the heat exchange area of the indoor heat exchanger 40 is increased. The both ends here are the first end 41b and the second end 41c.

  Next, the pipe connection work for the indoor heat exchanger 40 configured as described above will be described. The pipe connection work for the indoor side heat exchanger 40 is centered on the brazing work of the branch pipe 62 and the refrigerant outlet pipe 63 for the heat exchange tube 42 at the first end 41 b of the branch heat exchanger 41.

In this brazing operation, as shown in FIG. 6, first, the two branch heat exchangers 41 are temporarily assembled in the same posture as when assembled into the product main body 20 on the brazing jig 80.
Here, the outline of the structure of the brazing jig 80 and the incorporation into the brazing jig 80 will be described. As shown in FIG. 6, the brazing jig 80 is temporarily assembled so as to maintain the posture when the indoor heat exchanger 40 is assembled into the product main body 20. The brazing jig 80 includes an outer member 81 that supports the outside of the indoor heat exchanger 40 from four directions, and an inner member 82 that presses the intermediate portion 41 a in the longitudinal direction of the branch heat exchanger 41 against the outer member 81. It is comprised by. As can be seen from FIG. 6, the outer member 81 has a flat support wall 81 a that supports the bottom surface of the indoor heat exchanger 40, and a side surface support that supports the intermediate portion 41 a of each branch heat exchanger 41 at two opposite locations. It consists of a wall 81b and a bent end support wall 81c that supports the second end 41c of the two branch heat exchangers 41 simultaneously. The side support walls 81b and the end support walls 81c are connected to the flat support walls 81a, respectively. The inner member 82 includes a pressing wall portion 82a that presses the inner surface side of the intermediate portion 41a against the side surface support wall 81b of the outer member 81, and a pressing device 82b that applies a force pressing the pressing wall portion 82a outward.

  In the temporary assembly on the brazing jig 80, first, the branch heat exchanger 41 is brought into a state where the end plates of the second end portion 41c are connected to each other. Then, the branch heat exchanger in this state is mounted inside the outer member 81 so as to have the same shape as that stored in the product main body 20 as shown in FIG. Next, in this state, the pressing device 82b of the inner member 82 is operated, and the intermediate portion 41a of the branch heat exchanger 41 is pressed against the side surface support wall 81b of the outer member 81 through the pressing wall portion 82a. As a result, the intermediate portion 41 a of the branch heat exchanger 41 is sandwiched between the side surface support wall 81 b of the outer member 81 and the pressing wall portion 82 a of the inner member 82. In this way, the indoor heat exchanger 40 is temporarily assembled on the brazing jig 80.

  Next, the necessary brazing is performed at the end portion of the indoor heat exchanger 40 temporarily assembled on the brazing jig 80 in this manner. In order to perform this brazing operation easily and reliably, brazing of one branch heat exchanger 41 is performed, and then brazing is performed on the other branch heat exchanger 41.

  For example, first, the indoor heat exchanger 40 in the temporarily assembled state on the brazing jig 80 is set to the state shown in the left side of FIG. By doing in this way, the end plate of the 1st end part 41b in the left branch heat exchanger 41 is hold | maintained horizontally, and the pipe axis of the heat exchange tube 42 brazed is orient | assigned to a perpendicular direction. In this way, for example, the branch pipe 62 and the refrigerant outlet pipe 63 can be brazed easily and reliably to the heat exchange tube 42 at the first end 41b of the left branch heat exchanger 41. And when brazing about the left branch heat exchanger 41 is complete | finished, it rotates like the figure on the right side in the figure, and the left branch heat exchanger 41 is rotated about the right branch heat exchanger 41. Brazing is performed in the same manner as in.

  Note that other pipes and devices connected around the first end 41 b of the branch heat exchanger 41 should be brazed before being incorporated into the product body 20 on the brazing jig 80. It is more convenient to do. For example, brazing of the refrigerant outlet pipe 63 to the header 64 is an operation of brazing so that the front end portion of the refrigerant outlet pipe 63 is directed to the header 64 from the branched heat exchanger 41 side. Accordingly, at the brazing location, as described above, the brazing is performed by rotating the indoor heat exchanger 40 attached to the brazing jig 80 so that the tube axis of the refrigerant outlet pipe 63 faces the vertical direction. If it does, brazing of the refrigerant | coolant exit pipe | tube 63 with respect to the header 64 can be performed easily and reliably.

Since the ceiling-embedded air conditioner according to the present embodiment is configured as described above, the following effects can be achieved.
(1) The longitudinal dimension of the branch heat exchanger 41 is made longer than that of the above-described conventional two-way blowing type ceiling-embedded air conditioner, whereby the heat exchange area of each branch heat exchanger 41 is increased. Can be increased.

  (2) Further, the bending angle α of the first end portion 41b and the bending angle β of the second end portion 41c in the branch heat exchanger 41 are not necessarily the same, but are different. Therefore, taking into account the dimensions of the product main body 20, the relationship between the bending bend of the bending heat exchanger 41 and the bending length of both ends, the convenience of the piping connection process to the branch heat exchanger 41, etc. The bending angles α and β at the end can be arbitrarily set. Thereby, the bad effect on manufacture of a branch heat exchanger can be avoided.

  (3) Since the bending angle α of the first end 41b of the branch heat exchanger 41 is 45 degrees or less in the indoor heat exchanger 40, the branch pipe 62 is connected to both the branch heat exchangers 41. This makes it easier to braze. The reason is that, as described above, the posture of the indoor heat exchanger 40 temporarily assembled on the brazing jig is changed so that the tube axis of the heat exchange tube 42 to be brazed is in the vertical direction. This is because it becomes easy.

  (4) Since the bending angle β of the second end portion 41c is formed larger than the bending angle α of the first end portion 41b, the branch heat exchanger 41 is advantageous in making the longitudinal dimension as long as possible. It is. Thereby, the heat exchange area of each branch heat exchanger 41 can be increased, and the heat exchange area of the indoor side heat exchanger 40 can be increased.

  (5) The shunt pipe 62 from the shunt 61 opposes a line perpendicular to the air passage surface from the edge of the first end portion 41b of both branch heat exchangers 41 on the first end portion 41b side of the air passage portion. The piping is processed so as to be within a triangular region formed by two lead lines 46 and 47 drawn out to the branch heat exchanger 41 side. Therefore, the bundle of the branch pipes 62 does not hinder the air flow passing through the branch heat exchanger 41.

  (6) A plurality of, specifically, a total of 14 shunt pipes 62 led out from the shunt 61 are outermost in the longitudinal direction at the first ends 41b of the two branch heat exchangers 41 as viewed in a plan view. Since the outermost line 45 that connects the positions is processed so as not to protrude outward in the longitudinal direction, the air conditioner can be formed compactly.

  (7) Since a plurality of, specifically, seven refrigerant outlet pipes 63 led out from both branch heat exchangers 41 are connected to one header 64, respectively, each of the branch heat exchangers 41 is inherently provided. The header 64 required for this can be completed with one component. Therefore, the space required for the header 64 can be minimized, and this air conditioner can be formed compactly.

  (8) Since the blower 30 is disposed in the product main body 20 so as to be biased toward the second end portion 41c, the blower 30 and the first end portion 41b are more than the space between the blower 30 and the second end portion 41c. The space between can be increased. Therefore, this large space can be effectively used as a wiring space for connecting the electrical component box 71 and the electrical components. In particular, electrical components such as the drain pump 68 and the drain water level sensor 67 are often connected near the first end 41b of the branch heat exchanger 41, which is convenient for connecting these electrical components.

(Embodiment 2)
Next, Embodiment 2 will be described with reference to FIG. The two-way blowing type ceiling-embedded air conditioner according to the second embodiment is improved in performance by enlarging the longitudinal dimension of the decorative panel 10 and the product main body 20 as compared with the first embodiment. is there. Other configurations are the same as those of the first embodiment. Hereinafter, a two-way blowing type ceiling-embedded air conditioner according to the second embodiment will be described focusing on differences from the first embodiment. In addition, the same code | symbol is attached | subjected to the component same as Embodiment 1, and the description is abbreviate | omitted or simplified.

  In the ceiling-embedded air conditioner according to the second embodiment, the dimensions of the main body casing 21, the decorative panel 10, and the drain pan 50 are increased in order to increase the longitudinal dimension of the product main body 20 as described above. It has changed. Further, in this ceiling-embedded air conditioner, the longitudinal dimension of the branch heat exchanger 41 is made larger than that of the first embodiment so as to correspond to the longitudinal dimension of the product body 20. Yes. More specifically, compared with Embodiment 1, the dimension of the intermediate part 41a of the branch heat exchanger 41 is enlarged, and the bent dimensions of the bent first end part 41b and second end part are included. Are the same.

  In addition, the ceiling-embedded air conditioner according to the second embodiment has two blowers 30 that are housed in the product main body 20 at regular intervals in the longitudinal direction in order to improve performance. In addition, a partition wall 35 for partitioning the blow-out space of both the blowers 30 is installed at an intermediate portion of these blowers 30. Furthermore, the air blowers 30 are arranged such that the intermediate point is biased toward the second end 41c.

The two-way blowing type embedded ceiling air conditioner according to the second embodiment is mainly compared with the two-way blowing type ceiling embedded air conditioner according to the first embodiment in the above points. Is different.
Since the ceiling-embedded air conditioner according to the second embodiment is configured as described above, the effects (1) to (7) according to the first embodiment and the following effects are achieved. Can do.

  (9) Since the two blowers 30 are arranged in the product main body 20 so as to be biased toward the second end 41c, the space between the one of the two blowers 30 and the second end 41c is more than Also, the space between the other blower 30 and the first end 41b is larger. As a result, the space on the first end 41b side can be effectively used as a wiring space for connecting the electrical component box 71 and the electrical component. In particular, electrical components such as the drain pump 68 and the drain water level sensor 67 are often connected near the first end 41b of the branch heat exchanger 41, which is convenient for connecting these electrical components.

(Modification)
The two-way blowing type ceiling-embedded air conditioner according to the present invention is not limited to the above-described embodiment, and the following modifications are also applicable. Note that the following modifications may be applied by combining different modifications as appropriate.

  In the first and second embodiments, a plate fin coil in which plate fins are attached to the U-shaped heat exchange tube 42 is exemplified as the indoor side heat exchanger 40. The present invention is not limited to such a type of heat exchanger, but can be applied to other types using a heat exchanger for air. As another type of heat exchanger, for example, a microchannel heat exchanger having a microchannel serving as a refrigerant passage can be cited.

  The bending angle α of the first end 41b in the first and second embodiments is that the longitudinal dimension of the branch heat exchanger 41 is made as long as possible and the piping brazing operation at the first end 41b. 45 degrees is considered most preferable from the balance. However, the present invention is not limited to this, and other angles may be used. The bending angle α is preferably set to 45 degrees or less when importance is attached to pipe brazing workability.

  In the first and second embodiments, the bending angle β of the second end portion 41c is as much as possible as long as the bending margin of the bent second end portion 41c can be secured. It is preferable to approach 90 degrees. Therefore, the bending angle β described in the previous embodiment is not limited to 60 degrees.

  -In the said Embodiment 1 and 2, the position of the air blower 30 in the product main body 20 is biased to the 2nd end part 41c side. However, the present invention is not limited to this. However, as in the first and second embodiments, when an electrical component box is installed between the blower 30 and the first end portion 41b side, wiring or the like does not increase the air resistance in the machine. It is preferable to install the blower 30 so as to be biased toward the second end 41c side of the branch heat exchanger 41.

  In the first and second embodiments, the shunt pipe 62 from the shunt 61 is opposed from the edge on the first end 41b side of the air passage portion in the first end 41b of both branch heat exchangers 41. Pipe processing is performed within a triangular region formed by two lead lines 46 and 47 perpendicular to the air passage surface drawn out to the branch heat exchanger 41 side. However, the present invention is not limited to this. In addition, when pipe processing is performed within the triangle as described above, an increase in the in-machine air resistance by the shunt pipe 62 is prevented.

  In the first and second embodiments, the indoor suction port 12 is formed in an elongated shape similar to the indoor air outlet 11 inside the indoor air outlet 11 on the lower surface of the decorative panel 10. However, the indoor suction port 12 may be configured to extend over substantially the entire inside of the indoor air outlet 11.

  -Moreover, the lower surface of the decorative panel 10 in the said Embodiment 1 and 2 is formed in the plane. However, the present invention is not limited to this. For example, the slanted surface that projects the center part in the short side direction of the decorative panel 10 downward, makes the projecting part a flat part extending in the entire long side direction, and extends both sides in the short side direction in the entire long side direction. And And it is good also as what formed the indoor inlet 12 into the shape extended to the substantially whole flat part of a center, and formed the indoor blower outlet 11 in the inclined surface formed in the both sides of this flat part.

  α, β: bending angle, 10: decorative panel, 11: indoor outlet, 12: indoor inlet, 20 ... product body, 30 ... blower, 40 ... indoor heat exchanger, 41 ... branch heat exchanger, 41a ... intermediate part, 41b ... first end part, 41c ... second end part, 42 ... heat exchange tube, 45 ... outermost line, 46, 47 ... (drawn from the edge on the first end side of the air passage part E) Leader line, 61 ... shunt, 62 ... shunt pipe, 63 ... refrigerant outlet pipe, 64 ... header.

Claims (4)

A decorative panel (10) having an indoor outlet (11) for blowing out temperature-controlled air into the room and an indoor inlet (12) for sucking in indoor air, a blower (30), and an indoor heat exchanger (40) A built-in rectangular parallelepiped product main body (20), and a two-way blowing type ceiling embedded air conditioner having a rectangular planar shape,
The decorative panel (10) has two indoor outlets (11) formed along two opposing long sides,
The blower (30) is a centrifugal blower disposed in the product main body (20) with a rotation axis as a vertical direction,
The indoor heat exchanger (40) is arranged between the two indoor outlets (11) and the blower (30) and is symmetrical with respect to the blower (30) in plan view. Comprising two branch heat exchangers (41) formed to form a typical shape,
These branch heat exchangers (41) have a first end (41b) on the side where the refrigerant pipe outside the branch heat exchanger is connected to the refrigerant passage in the branch heat exchanger (41) when viewed in the longitudinal direction. ), An intermediate portion (41a), and a second end portion (41c) opposite to the first end portion (41b) where the refrigerant passage is folded,
The intermediate part (41b) is formed in parallel with the indoor outlet (11), and the first end part (41b) and the second end part (41c) are respectively on the fan (30) side. Further, the first end portion (41b) and the second end portion (41c) are formed to have different bending angles (α, β) with respect to the intermediate portion (41a), A shunt pipe (62) from a shunt (61) is connected to the first end (41b) of the branch heat exchanger (41) ,
The shunt pipe (62) has an outermost line (45) connecting the outermost positions in the longitudinal direction at the first ends (41b) of the two branch heat exchangers (41) when viewed in plan. Two drawers in which a line perpendicular to the air passage surface is drawn from the end edge on the first end (41b) side of the air passage portion in both branch heat exchangers (41) to the opposite branch heat exchanger (41) side A two-way blow-out type ceiling-embedded air conditioner characterized in that piping is processed in a substantially triangular region formed by the lines (46) and (47) . In the two-way outlet type ceiling-embedded air conditioner according to claim 1 ,
The indoor heat exchanger (40) is configured such that a plurality of refrigerant outlet pipes (63) led out from the two branch heat exchangers (41) are connected to one header (64). A two-way blowout type ceiling-embedded air conditioner. The two-way blowing type ceiling-embedded air conditioner according to claim 1 or 2 ,
The blower (30) is arranged in a two-way blowing type ceiling-embedded type, characterized in that the position in the longitudinal direction in the product body (20) is biased toward the second end (41c) side. Air conditioner. The two-way blowing type ceiling-embedded air conditioner according to any one of claims 1 to 3 ,
Two of the blowers (30) are arranged at regular intervals in the longitudinal direction in the product body (20), and an intermediate point between the two blowers (30) is the second end. A two-way blow-out type ceiling-embedded air conditioner that is biased toward the portion (41c).