JP5884069B2 - Built-in air conditioner - Google Patents

Description

  The present invention relates to a built-in type air conditioner including an indoor unit installed on a ceiling portion of a building.

  2. Description of the Related Art Conventionally, a built-in type air conditioner including an indoor unit installed in a ceiling portion such as a ceiling space of a building and an outdoor unit connected to the indoor unit through a refrigerant pipe is known. In this type of built-in type air conditioner, the outdoor unit stores a compressor and an outdoor heat exchanger, the indoor unit stores an indoor heat exchanger and a blower, the compressor, the outdoor heat exchanger, and The indoor heat exchanger is connected by a refrigerant pipe to form a refrigerant circuit, and conditioned air that is blown to the indoor heat exchanger by the blower and exchanges heat with the refrigerant flowing in the indoor heat exchanger is covered through the blowout duct. It blows out into the harmony room (for example, refer to patent documents 1).

JP 2002-162064 A

By the way, in the indoor unit of a built-in type air conditioner, the inside of the unit case is a partition plate provided substantially perpendicularly to the top plate and the bottom plate, and a blower chamber that houses a blower fan and heat that houses a heat exchanger. The heat exchange chamber is further divided into a primary chamber on the upstream side of the heat exchanger and a secondary chamber on the downstream side by the heat exchanger. In the heat exchange chamber, the heat exchanger becomes a ventilation resistance, and the static pressure increases in the primary side chamber. At the bottom of the heat exchange chamber, a drain pan that receives drain water from the heat exchanger is supported by the bottom plate. The heat exchanger is attached with its lower end in contact with the drain pan. However, the drain pan is pushed down below the unit case 11 by the high static pressure in the primary chamber, and the lower end of the heat exchanger is at the drain pan. It may be in a state of being lifted from. When the lower end of the heat exchanger is lifted from the drain pan, the air in the primary side chamber flows from the gap between the drain pan and the lower end of the heat exchanger to the secondary side chamber, and heat exchange efficiency is reduced. There's a problem.
An object of the present invention is to provide a built-in type air conditioner that solves the above-described problems of the related art and prevents the drain pan from being pushed downward by the static pressure in the primary side chamber.

In order to achieve the above object, the present invention partitions the inside of the unit body into a heat exchange chamber that houses a heat exchanger and a blower chamber that houses a blower fan by a partition plate, and sucks the blower fan. In the built-in type air conditioner that blows air by exchanging heat with the heat exchanger, the heat exchanger includes an upper heat exchange part and a lower heat exchange part connected in a substantially square shape in a side view, The drain pan on the lower surface of the heat exchanger is covered with a bottom plate, and the drain pan is provided with a drain reservoir whose bottom portion is one step lower than the contact portion with which the lower end portion of the lower heat exchange portion abuts. the bottom plate, extending in the longitudinal direction of the unit body, in contact with the drain pan, characterized in that the drain pan is provided a bead for supporting push from below the contact portion.

In this configuration, the drain pan may be sandwiched between the bead and the heat exchanger. Further, the partition plate is provided with a positioning plate with which the upper end of the side surface of the drain pan abuts, the bottom plate includes a second bead below a contact portion between the positioning plate and the drain pan, and the drain pan includes the second pan It is good also as a structure clamped between a bead and the said positioning board . Moreover, it is good also as a structure which provided the blower outlet of the said ventilation fan so as to oppose the vertex of the shape of the said heat exchanger .

  According to the present invention, the inside of the unit main body is partitioned by the partition plate into a heat exchange chamber that houses the heat exchanger and a blower chamber that houses the blower fan, and the air sucked by the blower fan is exchanged with the heat. In the built-in type air conditioner that heats and blows off with a heat exchanger, the drain pan on the lower surface of the heat exchanger is covered with a bottom plate, the bottom plate extends in the longitudinal direction of the unit body, contacts the drain pan, and Since the bead for supporting the drain pan by pushing it up from below is provided, the strength of the bottom plate can be improved by the bead and the deformation of the bottom plate can be prevented, and the bead plays an auxiliary role to fix the drain pan to the inside of the unit body 10, It is possible to prevent the drain pan from being pushed downward by the static pressure on the primary side chamber side of the heat exchange chamber.

It is a side view which shows the built-in type air conditioning apparatus which concerns on embodiment of this invention. It is an external appearance perspective view of an indoor unit. It is the external appearance perspective view which looked at the indoor unit from the lower surface side. It is a figure which shows the internal structure of an indoor unit. It is sectional drawing of an indoor unit. It is sectional drawing of a heat exchange chamber. It is a perspective view of an indoor heat exchange unit. It is a perspective view of a one side fixing member. It is a figure which shows the other side fixing member, (A) is a front view of the other side fixing member, (B) is a front view which shows the state which attached the other side fixing member to the indoor heat exchanger. It is a perspective view which shows the piping drawer side of an indoor unit at the time of removing an indoor heat exchange unit. It is a perspective view which shows a pump unit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
A built-in type air conditioner 1 according to an embodiment to which the present invention is applied includes an outdoor unit (not shown) and an indoor unit 5 connected to the outdoor unit through a refrigerant pipe. Although not shown, the outdoor unit is installed outdoors such as on the rooftop of a building, exchanges heat with outdoor air, condenses the refrigerant during cooling operation and releases heat to the outside air, and evaporates the refrigerant during heating operation. Heat is taken from outside air. The built-in type air conditioning apparatus 1 circulates this refrigerant between the outdoor unit and the indoor heat exchanger (heat exchanger) 60 of the indoor unit 5 to perform air conditioning of the conditioned room 2.

As shown in FIG. 1, the indoor unit 5 is arranged suspended in a ceiling space 34 between the ceiling 32 and the ceiling plate 33 of the building 31, and an indoor heat exchanger (heat exchanger) 60. And the unit main body 10 configured to accommodate the blower fan 50 for blowing air to the indoor heat exchanger 60, the suction duct 53 extending from the unit main body 10 to the ceiling plate 33, and the blowout duct 54. The
The unit case 11 of the unit body 10 includes a top plate 12, a bottom plate 13, side plates 14A and 14B, a suction side panel 15, and a blowout side panel (front plate) 16, and is formed in a substantially rectangular shape. The unit case 11 includes a plurality of hanging brackets 41 fixed to the side plates 14A and 14B. The unit main body 10 is suspended in the ceiling back space 34 by attaching these suspension fittings 41 to suspension bolts 42 suspended from the ceiling 32. A detachable ceiling panel 35 is attached to the ceiling plate 33 at an appropriate position, particularly near the unit main body 10. By removing the ceiling panel 35, the indoor unit 5 can be connected from the conditioned room 2 side. Various maintenance can be performed.

  The unit case 11 includes a suction side panel 15 disposed on a pair of opposed side surfaces and a blowout side panel 16, and a suction port 17 formed on the suction side panel 15 disposed on the upstream side of the blower fan 50. And an outlet 18 formed in the outlet side panel 16 disposed on the downstream side of the indoor heat exchanger 60. At an appropriate position of the ceiling plate 33, an air inlet 51 and an air supply port 52 are provided that allow the interior of the conditioned room 2 to communicate with the ceiling space 34. The suction port 17 of the unit case 11 and the suction port 51 of the ceiling plate 33 are connected by a suction duct 53. Further, the air outlet 18 of the unit case 11 and the air supply port 52 of the ceiling plate 33 are connected by an air outlet duct 54.

  The indoor unit 5 sucks the air in the conditioned room 2 into the unit main body 10 through the air inlet 51, the air inlet duct 53, and the air inlet 17 by driving the blower fan 50, and the air thus sucked in the indoor heat exchanger 60. Then, heat is exchanged with the refrigerant flowing through the indoor heat exchanger 60, and conditioned air is supplied into the conditioned room 2 through the air outlet 18, the air outlet duct 54, and the air inlet 52. That is, the indoor unit 5 sucks the air in the conditioned room 2 and blows the conditioned air heat-exchanged with the refrigerant flowing in the indoor heat exchanger 60 to the conditioned room 2 again.

  As shown in FIG. 2, a maintenance panel 56, a pump unit 75, and a lid (pipe presser) 68 are detachably attached to the side plate 14 </ b> A that forms one side surface of the unit case 11. . The maintenance panel 56 is attached to the side plate 14A so as to close a maintenance opening provided in the side plate 14A in order to perform maintenance of an electrical unit (not shown) accommodated in the unit case 11. The pump unit 75 includes a drain pump 78 that draws drain water from a drain pan 70, which will be described later, and a fixture 79 of the drain pump 78, and the drain pump 78 is unitized via a pump mounting opening 75A provided in the side plate 14A. While being accommodated in the case 11, the fixture 79 is attached to the side plate 14A so as to close the pump attachment opening 75A. The lid 68 is connected to the indoor heat exchanger 60 and is disposed to hold down the auxiliary refrigerant pipe 67 that penetrates the side plate 14A through the notch 68C. Moreover, when the cover body 68 is attached to the side plate 14A, the cutout 68C formed in the side plate 14A is closed.

Thus, since the electrical unit, the drain pump 78, and the auxiliary refrigerant pipe 67 are arranged together on the side plate 14A side of the unit case 11, the maintainability of the unit body 10 can be improved.
Below the pump unit 75, a drain pipe cutout 19 is provided by cutting out the side plate 14A so as to open downward. The drain pipe notch 19 is provided with a drain pipe presser 76 that is detachably fitted to the drain pipe notch 19. The drain pipe retainer 76 is provided with a hole 76A (see FIG. 10) through which the drain drain pipe 77 passes, and a drain drain pipe 77 connected to a drain pan 70 described later protrudes from the hole 76A. For example, when drain water remaining in the drain pan 70 is discharged during maintenance of the unit main body 10, the drain water can be discharged outside the unit main body 10 through the drain drain pipe 77.

  Screw holes 69 </ b> A and 69 </ b> A are formed in the blowout side panel 16 so as to be vertically arranged on both sides outside the blowout port 18. Screw holes 69B and 69B are formed in the top plate 12 at substantially the same position in the unit width W direction of the screw holes 69A and the unit case 11. As will be described in detail later, the screws 4 (see FIG. 5) for fixing the indoor heat exchanger 60 to the unit case 11 are screwed into the screw holes 69A and 69B.

  In the unit main body 10, the air sucked from the suction port 17 flows toward the blowout port 18 along the depth L direction of the unit case 11, and the refrigerant circulating between the outdoor units is approximately the flow of this air. The unit case 11 is configured to flow straight along the unit width W direction of the unit case 11.

  As shown in FIG. 3, the bottom plate 13 is divided into two in the depth L direction of the unit case 11, and includes a blower chamber side bottom plate 13 </ b> B on the suction port 17 side and a heat exchange chamber side bottom plate 13 </ b> A on the outlet 18 side. Is done. A first bead 71 and a second bead 72 extending in the width direction (longitudinal direction) of the unit case 11 are formed at a predetermined position in the depth L direction of the unit case 11 on the heat exchange chamber side bottom plate 13A. The The beads 71 and 72 may be a single continuous bead like the first bead 71 or may be divided into a plurality of beads like the second bead 72. The bottom plate 13 is formed from a thin plate member made of metal, and the beads 71 and 72 are formed by subjecting this plate member to press working or the like. The length of each bead 71, 72, the position to be formed, and the number to be formed can be appropriately changed with respect to the size, shape, and thickness of the bottom plate 13. The dimension of the depth L of the unit case 11 can be changed as appropriate according to the output of the indoor unit 5. In the unit case 11 having a small depth L dimension, the bottom plate 13 is also shortened. In this case, for example, the beads 71 and 72 are It may be configured to have the same length and be provided all the way in the width W direction of the unit case 11. Since the heat exchange chamber side bottom plate 13A includes the beads 71 and 72, the strength is improved.

  FIG. 4 is a diagram in which the top plate 12 is removed from the unit case 11. As shown in FIG. 4, the inside of the unit case 11 is a partition plate 55 provided substantially perpendicular to the top plate 12 and the bottom plate 13, and a blower chamber R <b> 1 that houses the blower fan 50 and an indoor heat exchanger 60. And a heat exchange chamber R2 that accommodates The partition plate 55 is formed of a metal plate material or the like.

  As the blower fan 50, a sirocco fan that is a centrifugal blower fan is used. In the blower fan 50, a cylindrical fan main body 50A having a large number of blades is accommodated in a fan case 50B, and a motor shaft 50C extending in the axial direction of the fan main body 50A is connected to the fan motor 20, and the fan motor 20 The fan main body 50A is rotated by the drive of. The number of the blower fans 50 accommodated in the blower chamber R1 can be appropriately changed according to the dimensions of the unit case 11 (the output capacity of the indoor unit 5). In the present embodiment, the blower chamber R1 is provided with a plurality of blower fans 50 connected by a single motor shaft 50C, and the plurality of blower fans 50 are similarly rotated by the single fan motor 20. However, the present invention is not limited to this, and each of the plurality of blower fans 50 may include the fan motor 20. The partition plate 55 is provided with an opening 55A, and an air blowing port (blowing port) 50D of the blower fan 50 is connected to the opening 55A and exposed to the heat exchange chamber R2.

  As shown in FIG. 5, the indoor heat exchanger 60 includes a flat plate-like upper heat exchange unit 61 and a lower heat exchange unit 62, and these upper heat exchange unit 61, lower heat exchange unit 62, and However, they are connected in a substantially square shape in a side view. According to this configuration, the indoor heat exchanger 60 is configured by connecting the two plate-shaped heat exchange parts 61 and 62 in a substantially square shape in a side view. The height of the heat exchanger can be kept low and the heat exchange area can be increased compared to the case where the heat exchanger is arranged vertically.

  The upper heat exchanging portion 61 and the lower heat exchanging portion 62 are both fin-and-tube heat exchangers, and are arranged with a space between the pair of tube plates extending in the ventilation direction and the tube plates. A plurality of fin plates and a plurality of tubes penetrating the fin plates. The tubes are arranged in a plurality of rows in the front and rear (three rows in the present embodiment) and in a plurality of stages in the vertical direction, and are connected as one refrigerant pipe by a U-shaped portion (U vent) provided at the end of each tube. Yes.

  The upper heat exchanging portion 61 has an upper end 61C extending to the side of the lower surface of the top plate 12, and the lower heat exchanging portion 62 is in contact with a drain pan 70 whose lower end 62C will be described later. The indoor heat exchanger 60 divides the primary side chamber 65 </ b> A on the upstream side of the indoor heat exchanger 60 and the secondary side chamber 65 </ b> B on the downstream side of the indoor heat exchanger 60. Further, the upper heat exchanging portion 61 and the lower heat exchanging portion 62 are formed with the same width, and are accommodated almost fully in the unit width W.

  The upper heat exchanging portion 61 and the lower heat exchanging portion 62 are arranged at the lower end (lower end) of the upper heat exchanging portion 61 on the air inflow side surface 62A facing the primary chamber 65A of the lower heat exchanging portion 62. ) 61A rides and is arranged in a stacked state. In this way, the upper heat exchanging portion 61 and the lower heat exchanging portion 62 overlap each other with the lower end portion 61A of the upper heat exchanging portion 61 on the air inflow side surface 62A of the lower heat exchanging portion 62. They are connected at a right angle in a substantially square shape in side view. In other words, the vertex 60 </ b> A of the cross-section of the indoor heat exchanger 60 is formed by the corner on the outlet 18 side of the upper end 62 </ b> B of the lower heat exchange unit 62. The upper heat exchanging portion 61 is arranged closer to the blower fan 50 side, that is, the primary side chamber 65A side than the upper end portion 62B of the lower heat exchanging portion 62, and the air outflow side surface 61B of the upper heat exchanging portion 61 is disposed. And a step 60 </ b> C is formed between the upper end 62 </ b> B of the lower heat exchange unit 62.

  Drain water, such as condensed water, that is generated in the upper heat exchange unit 61 and flows along the outflow side surface 61B under its own weight, flows out from the air outflow side surface 61B of the upper heat exchange unit 61 and the upper end portion 62B of the lower heat exchange unit 62. It is received by the step 60 </ b> C formed between and flows along the surface of the lower heat exchange unit 62. Thereby, it is possible to prevent the drain water generated in the upper heat exchange part 61 from being scattered from the connecting part 60 </ b> B between the upper heat exchange part 61 and the lower heat exchange part 62.

  The blower fan 50 is arranged so that the blower port 50D is provided obliquely downward so that the blowing direction from the blower port 50D is directed to the connecting part 60B between the upper heat exchange unit 61 and the lower heat exchange unit 62. . In the indoor heat exchanger 60, the number of tube stages of the upper heat exchange unit 61 is configured to be six, and the number of tube stages of the lower heat exchange unit 62 is configured to be ten. That is, the upper heat exchange unit 61 and the lower heat exchange unit 62 are formed with the same thickness and the same width, and the heat exchange area of the lower heat exchange unit 62 is the heat exchange of the upper heat exchange unit 61. It is formed larger than the area. Thereby, since the blowing direction of the blower fan 50 is downward and the heat exchange area of the lower heat exchange part 62 is large, the air passing through the upper heat exchange part 61 and the lower heat exchange part 62 The amount of heat can be made substantially the same, the temperature difference in the heat exchange surface between the upper heat exchange unit 61 and the lower heat exchange unit 62 is reduced, and heat exchange in the indoor heat exchanger 60 is performed. Efficiency can be made uniform.

  As shown in FIG. 4, the indoor heat exchanger 60 may have a configuration in which the open side of the character is disposed in a direction facing the blower opening 50D of the blower fan 50, or the illustration is omitted. However, the structure arrange | positioned in the direction which opposes the ventilation port 50D of the ventilation fan 50 may be sufficient as the vertex side of a character-shape. The heat exchanger 60 is arranged so that the inclination α of the lower heat exchange part 62 with respect to the horizontal direction does not become smaller than 37 degrees. By setting the inclination angle of the lower heat exchange part 62 with respect to the horizontal direction to 37 degrees or more, it is possible to prevent the drain water from flowing through the lower heat exchange part 62 and the heat of the heat exchanger 60. It is possible to prevent the exchange capacity from being lowered due to adhesion of drain water.

  A drain pan 70 that receives drain water from the indoor heat exchanger 60 is disposed below the indoor heat exchanger 60. The drain pan 70 covers the entire bottom surface of the heat exchange chamber R2 and is supported by the bottom plate 13. The drain pan 70 is made of foamed polystyrene, and the inside of the indoor heat exchanger 60 that receives the drain water is covered with a resin sheet or the like for waterproofing and mold prevention. Thereby, the drain pan 70 can be reduced in weight. The drain pan 70 is formed with a drain reservoir 70A whose bottom is lowered by one step, and the drain reservoir 70A is provided with a suction port of a drain pump 78, although not shown.

Further, the drain pan 70 is formed with an abutting portion 73 with which the lower end portion 62C of the lower heat exchanging portion 62 abuts. Although not shown in the drawing, the contact portion 73 may have a configuration in which the cushioning material extends substantially fully in the width direction of the drain pan 70.
The bottom plate 13 is divided into a blower chamber side bottom plate 13B that covers the bottom surface on the blower chamber R1 side, and a heat exchange chamber side bottom plate 13A that covers the bottom surface on the heat exchange chamber R2 side. The drain pan 70 is detachably provided from the unit case 11 by removing the heat exchange chamber side bottom plate 13A. The drain pan 70 is formed in a box shape with four side surfaces rising from the bottom surface. A plurality of positioning plates 74 </ b> A with which the upper end of the side surface of the drain pan 70 abuts are provided at predetermined intervals in the width direction of the unit case 11 on the surface of the partition plate 55 and the heat exchange chamber R <b> 2 side of the blowout side panel 16. . That is, the drain pan 70 is held in a state of being sandwiched between the positioning plates 74A and 75 and the heat exchange chamber side bottom plate 13A. Thus, since the drain pan 70 is supported by the heat exchange chamber side bottom plate 13A and accommodated in the unit case 11, the heat exchange chamber side bottom plate 13A can be removed and easily detached from the bottom surface side of the unit case 11. Can do.

As shown in FIG. 6, the beads 71 and 72 described above are formed on the heat exchange chamber side bottom plate 13 </ b> A. The beads 71 and 72 are located below the primary side chamber 65 </ b> A between the partition plate 55 and the heat exchanger 60. The first bead 71 is positioned below the contact portion 73 where the lower end portion 62C of the lower heat exchange portion 62 and the drain pan 70 contact. In other words, in a state where the indoor heat exchanger 60, the drain pan 70, and the heat exchange chamber side bottom plate 13A are attached to the unit case 11, the lower end 62C of the lower heat exchange unit 62 and the drain pan 70 come into contact with each other. The part 73 and the first bead 71 of the heat exchange chamber side bottom plate 13A are arranged in the vertical direction.
The second bead 72 is provided below the position where the side surface upper end 70 </ b> A of the drain pan 70 contacts the positioning plate 74 </ b> A attached to the partition plate 55. That is, the contact portion where the positioning plate 74A attached to the partition plate 55 and the side surface upper end 70A of the drain pan 70 abut with the drain pan 70 and the heat exchange chamber side bottom plate 13A attached to the unit case 11. In addition, the second bead 72 is arranged in the vertical direction.

  The partition plate 55 includes an upper partition plate 55B and a lower partition plate 55C. The lower partition plate 55C includes a connection portion 74B that is bonded to the upper partition plate 55B by bending a single plate into a substantially L shape, and a bottom plate portion 74C that forms part of the bottom surface of the unit case 11. Are formed so as to be integrally provided. A positioning plate 74A is integrally formed with the lower partition plate 55C. The positioning plate 74A has a plurality of extended portions provided at a predetermined interval in the width direction of the unit case 11 at the upper part of the connection portion 74B, substantially perpendicular to the connection portion 74B and in the direction opposite to the bottom plate portion 74C. It is formed by bending it.

In the heat exchange chamber side bottom plate 13A, one side in the depth L direction of the unit case 11 extends from the partition plate 55 to the air blowing chamber R1 side. The one side of the heat exchange chamber side bottom plate 13A is fixed to the bottom plate portion 74C of the lower partition plate 55C from the bottom surface side with a plurality of screws 3 at predetermined intervals in the width direction of the unit case 11. .
The front plate 16 is bent in the upper and lower sides in the unit case 11 in a substantially U shape in a sectional view to form a top portion 16A and a bottom portion 16B. On the bottom portion 16B, the other side of the heat exchange chamber side bottom plate 13A is fixed by being screwed with a plurality of screws 3 at a predetermined interval in the width direction of the unit case 11 from the bottom surface side. As described above, the heat exchange chamber side bottom plate 13A is screwed with the screw 3 in a state where both end portions in the width direction are pressed against the bottom portion 16B and the bottom plate portion 74C from the bottom surface side of the unit case 11. Moreover, it can be easily removed from the conditioned room 2 side from which the ceiling panel 35 is removed, and the maintainability of the heat exchange chamber R2 can be improved.
The top plate 12 is fixed to the top portion 16A with screws, and formed between the upper end 60D of the indoor heat exchanger 60 and the top plate 12 by a foam material or the like covering the upper surface of the secondary side chamber 65. A heat insulating material 21 is attached.

  By the way, in the heat exchange chamber R2, since the indoor heat exchanger 60 becomes ventilation resistance, a static pressure becomes high in the primary side chamber 65A. In the primary chamber 65A, the drain pan 70 is sandwiched between the lower end 62C of the lower heat exchange unit 62 and the first bead 71, and between the positioning plate 74A and the second bead 72. As a result, the beads 71 and 72 play a role of auxiliaryly fixing the drain pan 70 and can prevent the drain pan 70 from being lifted by the static pressure on the primary side chamber 65A side with a simple configuration.

As shown in FIG. 7, one end side fixing member 63A and the other end side fixing member 63B are attached to both width end portions in the width direction of the indoor heat exchanger 60, respectively. The fixing members 63A and 63B are molded of resin, and are fixed integrally with the indoor heat exchanger 60 so that the indoor heat exchanger 60 is sandwiched between the fixing members 63A and 63B.
One end side fixing member 63 </ b> A is fixed to one end portion of the indoor heat exchanger 60. One end portion of the indoor heat exchanger 60 is formed integrally with a tube plate attached to the one end portion, and the upper end portion 61C of the upper heat exchange portion 61, the upper heat exchange portion 61, and the lower heat exchange portion 62. A fixing portion 8 extending to the air outflow side surfaces 61B and 62A is provided (see FIG. 6). The one end side fixing member 63A is screwed to the fixing portion 8 with a screw 8a and fixed to the indoor heat exchanger 60.

  FIG. 8 is a view of the one-end-side fixing member 63A viewed from the direction of the arrow shown in FIG. As shown in FIG. 8, the one end side fixing member 63A is formed with a plurality of vent holes 81 into which U vents protruding from the tube plate of the indoor heat exchanger 60 are inserted. Each vent hole 81 is formed in correspondence with the position of the U vent protruding from the tube plate, and the one end side fixing member 63A is positioned by inserting the U vent into each vent hole 81, as described above. By screwing the fixing portion 8, it can be easily attached to the indoor heat exchanger 60. A peripheral wall 81A is formed in the vent hole 81 along the outer periphery. The peripheral wall 81A is formed at substantially the same height as the height of the U vent inserted into the vent hole 81. Further, the width W2 of the one end side fixing member 63A is formed to be substantially the same as the height of the U vent inserted into the vent hole 81. The peripheral wall 81A and the one end side fixing member 63A surround the periphery of the U vent protruding from the tube sheet, and prevent the U vent from colliding with other members when the indoor heat exchanger 60 is attached to and detached from the unit case 11. be able to. Further, by inserting a U vent into each vent hole 81, the one end side fixing member 63A can be positioned and temporarily fixed with respect to the indoor heat exchanger 60, and the fixing member 63 can be easily exchanged with the indoor heat. It can be fixed to the vessel 60 integrally.

  As shown in FIG. 7, the other end side fixing member 63 </ b> B is attached to the other end side of the indoor heat exchanger 60. An auxiliary refrigerant pipe 67 for connecting the indoor heat exchanger 60 to the gas pipe and the liquid pipe extends from the other end side fixing member 63B. The auxiliary refrigerant pipe 67 includes a gas pipe auxiliary refrigerant pipe 67A for connection to the gas pipe and a liquid pipe auxiliary refrigerant pipe 67B for connection to the liquid pipe. The auxiliary refrigerant pipe 67 is gathered on the other end side fixing member 63B side, and is configured such that no member protrudes from the indoor heat exchanger 60 to the outside of the one end side fixing member 63A.

The other end side fixing member 63B is substantially along the air outflow side surfaces 61B and 62A of the upper heat exchanging portion 61 and the lower heat exchanging portion 62, as shown in FIGS. 9A and 9B. It has the groove | channel 25 formed in the character. A recess 26 is formed in the groove 25, and a screw hole 26 </ b> A into which the screw 7 for fixing the tube plate 9 is screwed is provided in the recess 26. The other end side fixing member 63 </ b> B extends from the secondary side of the indoor heat exchanger 60 to the tube plate 9 along the groove 25 along the air outflow side surfaces 61 </ b> B and 62 </ b> A of the upper heat exchange unit 61 and the lower heat exchange unit 62. Fixed to. The tube plate 9 includes a plate material 9 </ b> A that is integrally formed with the tube plate 9 and extends from the tube plate 9. The plate material 9 </ b> A is inserted into the recess 26 formed in the groove 25. The plate member 9 </ b> A and the recess 26 are screwed together with the screws 7, and the other end side fixing member 63 </ b> B is fixed integrally with the indoor heat exchanger 60. Thus, since the other end side fixing member 63B includes the groove 25 along the tube plate 9 on the secondary side of the indoor heat exchanger 60, it interferes with the auxiliary refrigerant pipe 67 connected to the indoor heat exchanger 60. Can be installed without
In this way, the indoor heat exchanger 60, the fixing members 63A and 63B, and the auxiliary refrigerant pipe 67 are integrated as an indoor heat exchange unit 80, and the indoor heat exchange unit 80 is integrally attached to and detached from the unit case 11. Can be installed freely.

  As shown in FIGS. 7, 8, and 9, screw holes 64 </ b> A and 64 </ b> B for fixing the indoor heat exchange unit 80 to the unit case 11 with screws are formed in the fixing members 63 </ b> A and 63 </ b> B. The screw hole 64A is provided at a position corresponding to the screw hole 69B formed in the top plate 12 of the unit case 11, and the screw hole 69B and the screw hole 64A are screwed together with a screw, so that the indoor heat exchange unit 80 is fixed to the top plate 12 of the unit case 11. The screw hole 64A may be formed integrally with the one end side fixing member 63A as provided in the one end side fixing member 63A, or the other end as provided in the other end side fixing member 63B. You may form in the metal bracket etc. which are integrally fixed to the side fixing member 63B. The fixing members 63A and 63B are provided with a boss portion 64C in which a screw hole 64B is formed, and a screw thread into which a screw is screwed through the screw hole 64A is formed inside the boss portion 64C. .

The screw hole 64 </ b> B is provided at a position corresponding to the screw hole 69 </ b> A formed in the outlet side panel 16 of the unit case 11. A plurality of screw holes 69A are provided in the vicinity of the air outlet 18 formed in substantially the same width as the indoor heat exchanger 60. The screw holes 69A and the screw holes 64B are screwed together with screws, The indoor heat exchange unit 80 is fixed to the blow-out side panel 16 of the unit case 11.
Thus, the fixing members 63A and 63B function to partition the primary side chamber 65A upstream of the indoor heat exchanger 60 and the secondary side chamber 65B from both side surfaces of the indoor heat exchanger 60 in the heat exchange chamber R2. Fulfill. In addition, since the fixing members 63A and 63B are formed of a resin material having excellent heat insulation properties, the secondary side chamber 65B and the primary side chamber 65A are formed on the fixing members 63A and 63B without attaching the heat insulating material. Can be insulated.

  The indoor heat exchange unit 80 is fixed to the top plate 12 and the blowout side panel 16 using screw holes 64A and 64B provided in fixing members 63A and 63B attached to both end portions in the width direction. It can be fixed inside the main body 10. Thus, the fixing members 63A and 63B serve to partition the primary side chamber 65A and the secondary side chamber 65B on both side surfaces of the indoor heat exchanger 60, and fix the indoor heat exchanger 60 in the unit body 10. In order to fulfill the role, for example, a fixture for fixing the indoor heat exchanger 60 to the partition plate 55 is provided, and the number of parts is reduced as compared with the case where the indoor heat exchanger 60 is fixed inside the unit body 10. And improvement of workability | operativity can be aimed at. Moreover, there is no protrusion of the fixture from the indoor heat exchanger 60 to the blower fan 50 side, and the ventilation resistance in the primary side chamber 65A of the heat exchange chamber R2 can be reduced.

  In addition, the one end side fixing member 63A attached to one end side of the indoor heat exchanger 60 is provided with a vent hole 81 into which a U vent protruding from the tube plate is inserted, and is attached to the other end side of the indoor heat exchanger 60. Since the end-side fixing member 63B includes the groove 25 formed in a shape along the secondary side shape of the tube sheet 9, the end-side fixing member 63B does not interfere with members protruding outward from both ends of the indoor heat exchanger 60, and the indoor heat The fixing members 63A and 63B can be attached so as to sandwich the exchanger 60 from both ends. As described above, the indoor heat exchanger 60 is integrated with the auxiliary refrigerant pipe 67 connected to the indoor heat exchanger 60 in the unit main body 10 using the pair of fixing members 63A and 63B formed in different shapes. The maintenance of the indoor heat exchanger 60 is improved. Although details will be described later, the indoor heat exchange unit 80 is provided so as to be inserted into the heat exchange chamber R2 from the lower opening 40 shown in FIG.

FIG. 10 is a view of the unit main body 10 with the heat exchange chamber side bottom plate 13 </ b> A and the drain pan 70 removed, as viewed obliquely from below. Thus, the lower opening (opening) 81 over the whole bottom of the heat exchange chamber R2 is formed on the lower surface of the unit case 11 by removing the heat exchange chamber side bottom plate 13A and the drain pan 70.
On the side plate 14A, a lid body (pipe presser) 68, a fixture 79 for fixing the drain pump, and a maintenance panel 56 for the electrical unit housed inside are formed separately and are detachable. It is attached. FIG. 10 shows a state where the lid 68 is removed from the unit case 11 for convenience of explanation.

  The side plate 14A of the unit case 11 is provided with a notch 68C to which the lid 68 is attached. The notch 68 </ b> C is formed to open below the unit case 11 and communicate with the lower opening 40. The auxiliary refrigerant pipe 67 protruding outward from the side plate 14A from the indoor heat exchanger 60 is inserted into the heat exchange chamber R2 from the lower opening 40 integrally with the indoor heat exchanger 60 through the notch 68C. . The side plate 14A is provided with inverted U-shaped grooves 66A and 66B that open downward in a notch 68C so that auxiliary refrigerant piping can be inserted. That is, the notch 68 </ b> C is formed such that each inverted U-shaped groove 66 </ b> A, 66 </ b> B is disposed at a position corresponding to the auxiliary refrigerant pipe 67.

  The lid body 68 is provided with U-shaped grooves 68A and 68B opened upward at positions corresponding to the inverted U-shaped grooves 66A and 66B. The lid 68 is fixed to the side plate 14 </ b> A with unillustrated screws that close the notches 68 </ b> C of the side plate 14 </ b> A and are inserted into screw holes 68 </ b> D and 68 </ b> D provided in the lower portion of the lid 68. The lid 68 is formed with a handle 68E extending over the length L2 of the lid 68 above the screw holes 68D and 68D. The handle 68E is pressed by the hand to detach the lid 68 from the side plate 14A. Can do. When the lid 68 is attached to the side plate 14A, the auxiliary refrigerant pipe 67 is held on the side plate 14A by the cooperation of the U-shaped grooves 68A and 68B of the lid 68 and the reverse U-shaped grooves 66A and 66B of the side plate 14A. .

  Further, a water injection opening 85 is formed in the lid 68 between the U-shaped groove 68B and the handle 68E. The water injection opening 85 is normally closed with a lid 86 fixed to the lid body 68 with a screw or the like. When confirming the flow of drain water in the unit main body 10 such as when the unit main body 10 is attached, the lid 86 is removed from the water injection opening 85 and water is injected into the heat exchange chamber R2 through the water injection opening 85. To confirm the flow of drain water.

  The lid body 68 is fixed to the side plate 14A of the unit case 11 with screws or the like, and can be removed downward from the unit case 11 by removing these screws. The notch 68C communicates with the lower opening 40 by removing the lid 68 from the side plate 14A. Thereby, the bottom side of the unit case 11 is opened so that the indoor heat exchange unit 80 can be pulled out and removed from the unit case 11 without removing the auxiliary refrigerant pipe 67 from the indoor heat exchange unit 80.

When removing the indoor heat exchange unit 80, first, the pump-down operation of the built-in type air conditioner 1 is performed, and although illustration is omitted, the refrigerant in the indoor heat exchanger 60 is supplied to the outdoor unit or the refrigerant recovery machine. All are collected, the valve is closed, and the indoor heat exchanger 60 is disconnected from the refrigerant circuit. Next, the heat exchange chamber side bottom plate 13A, the drain pan 70, and the pipe retainer 68 are removed from the unit case 11 through the opening of the ceiling plate 33 from which the ceiling panel 35 has been removed, and the room heat is placed below the unit case 11. An opening for removing the replacement unit 80 downward is provided.
The drain drain pipe 77 connected to the drain pan 70 protrudes to the outside of the unit case 11 via a drain pipe presser 76 that is fitted to a pipe notch 19 that opens downward in the side plate 14A. Is removed from the unit body 10, the drain pipe holder 76 and the drain drain pipe 77 penetrating the drain pipe holder 76 are removed together with the drain pan 70 from the lower opening 40 from which the bottom plate 13 of the unit case 11 is removed. Can do.

  Subsequently, the screw 4 fixing the indoor heat exchange unit 80 to the unit case 11 is removed. Specifically, the screw 4 screwed into the screw hole 64B and the screw hole 69A is removed from the outside of the unit case 11, and the screw 4 screwed into the screw hole 64A and the screw hole 69B is removed from the inside of the unit case 11. Remove from. Thus, the indoor heat exchange unit 80 can be pulled out integrally below the unit case 11 via the lower opening 40 of the heat exchange chamber R2 and removed from the unit body 10. According to this configuration, the indoor heat exchanging unit 80 can be easily removed from the conditioned room 2 side by removing the ceiling panel 35, thereby reducing work in the ceiling space 34 with limited work space. Therefore, the maintainability of the indoor heat exchanger 60 can be improved.

  A pump unit 75 is attached to the side plate 14 </ b> A in the vicinity of the pipe presser 68. As shown in FIG. 11, the pump unit 75 integrally includes a drain pump 78 and a fixture 79 to which the drain pump 78 is fixed. In the fixing device 79, a pump fixing portion 79A to which the drain pump 78 is fixed and a lid portion 79B for closing the pump mounting opening 75A for mounting the pump unit 75 formed on the side plate 14A are integrally formed with resin. ing. A drain pipe 76 is connected between the drain pump 78 and the lid 79B for draining the water sucked from the drain pan 70 by the drain pump 78 to the outside of the unit case 11.

  The pump unit 75 is integrally provided with a drain pump 78 and a fixture 79 so as to be detachable from the side plate 14A, and the lid 79B is fixed to the side plate 14A with screws or the like. As a result, the drain pump 78 can be easily detached from the unit case 11 integrally with the pump unit 75, and the pump unit 75 can be attached to the unit case 11 even after the piping connected to the auxiliary refrigerant pipe 67 is connected to the indoor heat exchanger 60. The drain pump 78 can be easily maintained.

  As described above, according to the embodiment to which the present invention is applied, the inside of the unit main body 10 is divided by the partition plate 55 into the heat exchange chamber R2 that houses the heat exchanger 60 and the blower chamber that houses the blower fan 50. In the built-in type air conditioner 1 that partitions into R1 and blows off air sucked by the blower fan 50 by heat exchange with the heat exchanger 60, the drain pan 70 on the lower surface of the heat exchanger 60 is covered with the bottom plate 13, and the bottom plate 13 is covered. Are provided with beads 71 and 72 that extend in the longitudinal direction of the unit main body 10, abut against the drain pan 70, and support the drain pan 70 by pushing up the drain pan 70 from below, so that the strength of the bottom plate 13 is improved by the beads 71 and 72. 13 can be prevented from being deformed, and the beads 71 and 72 serve to support the drain pan 70 inside the unit body 10. It can be prevented from being pressed downward the drain pan 70 by the static pressure of the primary side chamber 65A side of the heat exchange chamber R2. As a result, the heat exchanger 60 in contact with the drain pan 70 is lifted from the drain pan 70 when the drain pan 70 is pushed downward, and the primary heat is generated from the gap between the drain pan 70 and the lower end 62C of the heat exchanger 60. The air in the side chamber 65A does not flow into the secondary side chamber 65B, and the heat exchange efficiency of the heat exchanger 60 can be prevented from decreasing.

  In addition, according to the embodiment to which the present invention is applied, the beads 71 and 72 are positioned below the partition plate 55 and the heat exchanger 60, and thus the partition plate 55 and the heat exchanger 60 where the static pressure increases. The beads 71 and 72 are provided below the primary side chamber 65A between them, and the drain pan can be effectively prevented from being pushed downward by the static pressure of the primary side chamber 65A.

  Further, according to the embodiment to which the present invention is applied, the beads 71 and 72 include the first bead 71 positioned below the contact portion 73 between the heat exchanger 60 and the drain pan 70, and the drain pan 70 includes the first bead 71. Since it is sandwiched between the 1 bead 71 and the heat exchanger 60, the drain pan can be supported by pushing it up from below against the contact portion 73, and the drain pan 70 is moved downward by the high static pressure in the primary side chamber 65A. The heat exchanger 60 can be prevented from being lifted from the drain pan 70 by being pushed down. This prevents the air in the primary side chamber 65A from flowing into the secondary side chamber 65B from the gap between the drain pan 70 and the lower end portion 62C of the heat exchanger 60, and reduces the heat exchange efficiency of the heat exchanger 60. Can be prevented.

  Further, according to the embodiment to which the present invention is applied, the beads 71, 72 include the second bead 72 positioned below the vicinity of the contact portion between the partition plate 55 and the drain pan 70, and the second bead 72 includes Oppositely, the partition plate 55 is provided with a positioning plate 74A with which the upper end 70A of the side surface of the drain pan 70 abuts, and the drain pan 70 is sandwiched between the second bead 72 and the positioning plate 74A. The drain pan 70 can be supported by pushing up the upper side surface 70A of the drain pan 70 from below with respect to the plate 74A, and the drain pan 70 can be prevented from being pushed down by the high static pressure in the primary side chamber 65A. .

  In addition, according to the embodiment to which the present invention is applied, the heat exchanger 60 includes the upper heat exchanging portion 61 and the lower heat exchanging portion 62 that are connected to each other when viewed in a side view, Since the air outlet 50D of the blower fan 50 is provided so as to be opposed, the capacity (heat exchange area) of the heat exchanger 60 can be increased without changing the height of the unit case 11.

  Further, according to the embodiment to which the present invention is applied, since the blower fan 50 is a sirocco fan that is a centrifugal blower, a large static pressure can be obtained, and the indoor heat exchanger 60 and the downstream of the blower fan 50, and Even in the built-in type air conditioner having a relatively long blowing duct 54 extending to the ceiling plate 33, a large air flow rate can be obtained.

DESCRIPTION OF SYMBOLS 1 Built-in type air conditioner R1 Blower chamber R2 Heat exchange chamber 10 Unit main body 13 Bottom plate 13A Heat exchange chamber side bottom plate 13B Blower chamber side bottom plate 25 Groove 50 Blower fan 55 Partition plate 60 Indoor heat exchanger (heat exchanger)
61 Upper heat exchange part 62 Lower heat exchange part 70 Drain pan 70A Side upper end 71 First bead (bead)
72 Second Bead (Bead)
73 Contact part 74A Positioning plate

Claims (5)

The inside of the unit body is partitioned by a partition plate into a heat exchange chamber that houses a heat exchanger and a blower chamber that houses a blower fan, and the air sucked by the blower fan is heat-exchanged by the heat exchanger. In the built-in type air conditioner that blows out,
The heat exchanger includes an upper heat exchange part and a lower heat exchange part connected in a substantially square shape in a side view,
Cover the drain pan on the lower surface of the heat exchanger with a bottom plate,
The drain pan is provided with a drain pool whose bottom portion is one step lower than the abutting portion with which the lower end portion of the lower heat exchanging portion abuts on the partition plate side,
Wherein the bottom plate, extending in the longitudinal direction of the unit body, in contact with the drain pan, built-in air conditioner which is characterized in that the drain pan is provided a bead for supporting push from below the contact portion . The built-in air conditioner according to claim 1, wherein the drain pan is sandwiched between the bead and the heat exchanger. Provide a positioning plate with which the upper end of the side surface of the drain pan abuts the partition plate;
The bottom plate includes a second bead below a contact portion between the positioning plate and the drain pan,
The built-in air conditioner according to claim 1 or 2, wherein the drain pan is sandwiched between the second bead and the positioning plate . The built-in type air conditioner according to any one of claims 1 to 3, wherein a blower outlet of the blower fan is provided so as to face the apex of the cross of the heat exchanger . The built-in type air conditioner according to any one of claims 1 to 4, wherein the blower is a centrifugal blower.

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