JP6828458B2 - Ceiling embedded air conditioner - Google Patents

Description

The present invention relates to a ceiling-embedded air conditioner, and particularly to a structure of an indoor unit.

In the ceiling-embedded air conditioner, the outdoor unit installed outdoors and the indoor unit installed behind the ceiling of the air conditioning room are connected by a gas pipe and a liquid pipe to form a refrigerant circuit. The indoor unit has a main body unit having a box-shaped outer body embedded in the ceiling, and a decorative panel arranged on the air-conditioning room side of the ceiling and attached to the main body unit.

The main unit of the ceiling-embedded air conditioner shown in the conventional example is provided with a turbofan type blower fan and a heat exchanger surrounding the blower fan, and the lower end of the main body unit receives drain water generated from the heat exchanger. A drain pan made of foamed styrene to receive is provided. A suction port is formed in the center of the decorative panel, and outlets are formed around the suction port along each of the four sides of the decorative panel. The air blower is sucked in from the suction port and blown out to all four sides of the air fan. The indoor air is exchanged with the refrigerant by the heat exchanger to become cold or warm air, flows through the air passage formed between the outer body and the heat exchanger, and is blown out from the air outlet to the air conditioning room. .. (See Patent Document 1)

Japanese Unexamined Patent Publication No. 2016-70612

The heat-exchanged air flowing through the air passage has a temperature difference from the air around the outer cylinder, so that the temperature of the outer cylinder becomes lower than the temperature of the air around the outer cylinder during cooling operation, causing dew condensation on the surface of the outer cylinder. appear. Therefore, a plate-shaped styrofoam heat insulating material is provided on the air passage side of the outer cylinder to insulate between the heat-exchanged air and the outer cylinder. Therefore, the inside of the outer body becomes narrower by the thickness of the heat insulating material. Since the size of the mounting opening provided on the ceiling is constant, the volume inside the main body unit is reduced by the thickness of the heat insulating material. Along with this, the heat exchanger becomes smaller and the heat exchange capacity decreases.

The present invention provides a ceiling-embedded air conditioner that solves the miniaturization of a heat exchanger by reducing the volume inside the main body unit with a heat insulating material.

In order to solve the above-mentioned problems, the present invention presents a rectangular top plate, a box-shaped outer body with side plates extending downward from the four sides of the top plate, and a main body provided with a heat exchanger inside the outer body. A unit, a first suction port on one side for sucking indoor air, a blown air heat exchanged by the heat exchanger on the other side facing the one side, and a decorative panel attached to the bottom surface of the main body unit. In the ceiling-embedded air conditioner
The main body unit is provided with a fan unit having a fan motor and a sirocco fan pivotally supported by the rotation shaft of the fan motor, and the heat exchanger surrounds the front, rear, left and right sides of the fan unit to exchange heat. A partition plate is provided on the lower surface of the vessel, and an air suction chamber into which indoor air sucked from the suction port flows is formed between the partition plate and the decorative panel and between the heat exchanger and the side plate. It is characterized by.

In the ceiling-embedded air conditioner of the present invention configured as described above, since the air suction chamber is provided between the heat exchanger and the side plate, the heat insulating material provided on the side plate becomes unnecessary, and the volume inside the main body unit is increased accordingly. You can make it bigger.

It is explanatory drawing which shows the installation state of the ceiling-embedded type air conditioner of Example 1 of this invention. It is a perspective view of the ceiling-embedded air conditioner of Example 1. FIG. It is an exploded view of the ceiling-embedded type air conditioner of Example 1. FIG. FIG. 2 is a schematic cross-sectional view taken along the line AA of FIG. FIG. 6 is a schematic cross-sectional view taken along the line CC of FIG. FIG. 2 is a schematic cross-sectional view taken along the line BB of FIG. It is explanatory drawing in the bottom view of the ceiling-embedded type air conditioner of Example 1. FIG. FIG. 1 is an explanatory diagram showing an air flow of the ceiling-embedded air conditioner of the first embodiment. FIG. 2 is an explanatory diagram showing an air flow of the ceiling-embedded air conditioner of the first embodiment. (A) is an exploded view of the ceiling-embedded air conditioner according to the second embodiment of the present invention, and (b) is a perspective view of a connecting member for two units. FIG. 1 is a perspective view 1 of a ceiling-embedded air conditioner according to a second embodiment of the present invention. FIG. 11 is a schematic cross-sectional view taken along the line EE of FIG. FIG. 11 is a schematic cross-sectional view taken along the line FF of FIG. FIG. 2 is a perspective view 2 of the ceiling-embedded air conditioner of the second embodiment.

Hereinafter, the first embodiment for carrying out the present invention will be described in detail as an example based on the accompanying drawings. The present invention is not limited to this.

In the air conditioner according to the present invention, an outdoor unit (not shown) installed outdoors and an indoor unit 1 attached to the ceiling T1 of the air conditioning chamber R are connected by a gas pipe and a liquid pipe (neither shown) to form a refrigerant circuit. To form.
The indoor unit 1 shown in FIGS. 1 and 2 includes a box-shaped main unit 10 embedded in the ceiling T2 and a decorative panel 70 arranged on the air conditioning chamber R side of the ceiling T1 and attached to the bottom surface of the main unit 10. It is a ceiling-embedded air conditioner, and in particular, a one-way blowout type ceiling-embedded air conditioner that blows out in one direction.

With reference to FIG. 3, the main body unit 10 has a rectangular top plate 111 made of sheet metal, and a box-shaped outer body 11 formed of side plates 112 and 113 extending downward from the four sides of the top plate 111. The side plate on the long side of the top plate 111 is the side plate 112, the side plate on the short side is the side plate 113, and two mounting brackets 12 are fixed to the two side plates 113 facing each other.

The mounting bracket 12 includes a hanging lower portion 121 formed by bending the upper end outward and a fixing portion 122 formed by bending the lower end outward. The main body unit 10 is installed in the attic T2 by suspending the hanging lower portion 121 with a plurality of hanging bolts (not shown) fixed to the attic T2.

The decorative panel 70 is erected from the back surface of the rectangular panel portion 71 and the panel portion 71, which are larger than the top plate 111, to the main body unit 10 side, and is attached to the open bottom surface of the box-shaped outer body 11 in the same size. It has a side wall portion 72. The side wall portion 72 includes a screwed portion 721 that is aligned and protrudes from the fixing portion 122 of the mounting bracket 12. The decorative panel 70 is fixed to the main body unit 10 by fixing the screw fixing portion 721 to the fixing portion 122 of the mounting bracket 12 with screws.

The panel portion 71 is provided with a suction port (first suction port) 731 having a square opening on one side of the long side facing each other, and a plurality of outlets 74 (a plurality of outlets 74) having a square opening on the other side of the long side facing one side. In FIG. 2, four locations) are provided, a second suction port 732 is provided on one side of two short sides adjacent to one side of the long side, and a third suction port 733 is provided on the other side.

In the indoor unit 1 in FIG. 2, the top plate 111 direction is the upper surface or the upper side, the air conditioning chamber R direction is the bottom surface or the lower side, the air outlet 74 side is the front side or the front side, and the first suction port 731 side is the back side or the rear side. 2 The suction port 732 side will be referred to as the left side surface or the left side, and the third suction port 733 side will be referred to as the right side surface or the right side. The same applies to each part.
≪Outer body≫

Next, the parts housed in the main body unit 10 shown in FIGS. 3 to 6 will be described. A heat insulating material 13 made of thick styrofoam is provided on the inner surface of the top plate 111 of the outer body 11. A thin heat insulating sheet (not shown) may be provided on the inner surfaces of the side plates 112 and 113 of the outer body 11 without providing the heat insulating material 13. The center of the heat insulating material 13 is opened, and a part of the top plate 111 is exposed when viewed from below. The heat exchanger 21 and the fan unit 30 are fixed to the top plate 111 of the exposed portion.

An electrical component box 14 containing electrical components (not shown) for controlling the indoor unit 1 is attached to the outer surface of the left side surface of the outer body 11.
≪Heat exchanger≫

The heat exchanger 21 is a fin tube type formed by a plurality of strip-shaped aluminum fins 23 arranged in parallel and a plurality of heat transfer tubes 22 penetrating the aluminum fins 23. The heat exchanger 21 is provided by being bent so as to form a frame along the side plates 112 and 113 of the outer body 11, and is a front left corner portion which is a corner portion of the heat exchanger 21. The 211, the rear left corner portion 212, and the rear right corner portion 213 have a rounded corner shape in which the aluminum fin 23 and the heat transfer tube 22 are bent so as to have the smallest possible radius. Both end portions of the heat exchanger 21 are located at the front right corner portion 214, which is the remaining corner portion. Therefore, the heat exchanger 21 is a short straight line connecting the rear left corner portion 212 and the rear right corner portion 213, which is a long straight portion, the heat exchanger rear portion 215, and the front left corner portion 211 and the rear left corner portion 212. The left part of the heat exchanger 216, the right part of the heat exchanger 217 which is a short straight part connecting the front right corner part 214 and the rear right corner part 213, and the long part connecting the front left corner part 211 and the front right corner part 214. A truck-type heat exchanger having a shape similar to that of a land truck will be described below by means of the heat exchanger front portion 218, which is a straight portion of the above.

Regarding the distance between the heat exchanger 21 and the outer body 11, the distance between the outer body 11 and the rear portion 215 of the heat exchanger is wider than the other parts. This is because the size of the opening of the first suction port 731, which is the main suction port, is adjusted so as to be outside the rear portion 215 of the heat exchanger.

Both side ends of the heat exchanger 21 are located at the front right corner portion 214 of the heat exchanger 21. Both side ends of the heat exchanger 21 are covered with the first side plate 24 and the second side plate 25, respectively. The heat exchanger 21 is a top with a mounting piece 251 provided at the upper end of each of the first side plate 24 and the second side plate 25, and a U-shaped mounting tool 27 provided at the rear part 215 of the heat exchanger and the front part 218 of the heat exchanger. Suspended and fixed to the plate 111.

A heat transfer tube 22 is penetrated through the first side plate 24, and the penetrating heat transfer tubes 22 are connected to each other by a U-shaped tube 221 at the end of the first side plate 24. A heat transfer tube 22 is penetrated through the second side plate 25, and is connected to a gas side connecting officer 222 and a liquid side connecting pipe 223 connected to the outdoor unit. The inner end sides of the first side plate 24 and the second side plate 25 are fixed to the connecting plate 26. The connecting plate 26 separates the inner space and the outer space of the heat exchanger 21. As a result, the space inside the heat exchanger 21 in which the inside of the main body unit 10 is separated by the connecting plate 26, the drain pan 40 described later, and the partition plate 50 becomes the blower chamber F. The space between the outer outer circumference of the heat exchanger 21 and the inner circumferences of the side plates 112 and 113 of the outer body 11 (lattice line portion in FIG. 5) is air for guiding the air sucked from the suction port to the heat exchanger. It becomes the suction chamber S. The air suction chamber S is formed so as to surround the outer periphery of the heat exchanger 21. The air suction chamber S guides the air K sucked from the first suction port 731, the second suction port 732, and the third suction port 733 to the heat exchanger 21. Further, the lower end 219 of the heat exchanger 21 is closed by the drain pan 40 and the partition plate 50, and is a part of the air suction chamber S, and is a space between the decorative panel 70, the drain pan 40 and the partition plate 50 (lattice line portion in FIG. 6). ) Is the air guide L, which will be described later.
≪Blower fan≫

The fan unit 30 is arranged in the blower chamber F provided inside the heat exchanger 21. The fan unit 30 includes a sirocco fan type blower fan 31, a fan motor 36, a fan mount 37 that supports the blower fan 31 and fixes it to the top plate 111, and a motor mount base that fixes the fan motor 36 to the top plate 111 ( (Not shown). The blower fan 31 has a tubular impeller 32 having a plurality of blades, a spiral fan casing 34 accommodating the impeller 32, and a rotating shaft 35 connected to the center of the impeller 32, with reference to FIG. Has. One or a plurality of blower fans 31 (4 in FIG. 3) are arranged side by side and coaxially. In addition, each blower fan 31 has the same structure.

In the fan unit 30, after fixing the fan motor 36 to the top plate 111 with a motor mount, two blower fans 31 are connected to each other by a rotating shaft 35 at both ends of the fan motor 36. Both ends of the rotating shaft 35 are connected to the fan mounting base 37, and the fan mounting base 37 is fixed to the top plate 111. Further, there is also a fixing portion 341 on the upper portion of the fan casing 34, which is fixed to the top plate 111 with screws.

The fan casing 34 has an accommodating portion 342 for accommodating the impeller 32 and a tubular blower portion 343 formed so as to extend downward from the accommodating portion 342 and continuously below the lower end 219 of the heat exchanger 21. A fan suction port 344 for taking air into the impeller 32 is circularly opened on the side surface of the accommodating portion 342. The fan casing 34 may be vertically divided on a surface parallel to the axis of the impeller 32 so that the impeller 32 can be accommodated therein, or may be divided into left and right on a surface perpendicular to the axis of the impeller 32. May be formed. Inside the fan casing 34, the accommodating portion 342 and the blowing portion 343 continuously serve as a blowing passage 33 for the blown air H.

The blower portion 343 of the fan casing 34 extends forward from the center of the blower chamber F until the lower end 345 of the fan casing is located below the front portion 218 of the heat exchanger. The lower end 345 of the fan casing is connected to the outlet 74 of the decorative panel 70. When the impeller 32 of the blower fan 31 rotates, the blown air H sucked from the fan suction port 344 is blown out around the impeller 32, and the blown air goes in one direction along the blower path 33 in the fan casing 34. Is blown out and blown out to the air conditioning room R. By extending the blower portion 343 of the fan casing 34 from the center of the indoor unit 1 to the front for a long time, the blown air H is widely blown out to the air conditioning chamber R and blown out in the direction opposite to that of the first suction port 731. By doing so, a short circuit is prevented.

The outlet 74 is provided with an outlet wind direction plate 38. By changing the direction of the blowout air direction plate 38 of each of the four outlets 74, the blown air H can be blown out in different directions, and further widely blown out to the air conditioning chamber R.
≪Drain pan≫

A drain pan 40 for receiving the drain water generated by the heat exchanger 21 is provided at the lower end 219 of the heat exchanger 21. In the drain pan 40, a styrofoam heat insulating member 41 and a resin drain sheet 42 provided on a surface facing the heat exchanger 21 are integrally formed.

The drain pan 40 covers the lower end 219 of the heat exchanger 21. The drain pan 40 is formed in a frame shape having an opening 43 in the center in accordance with the heat exchanger 21. The drain pan 40 has the minimum required functions as a drain pan that only receives the drain water generated by the heat exchanger 21, so that the drain pan 40 becomes smaller and the area occupied by the drain pan 40 in the main body unit 10 becomes smaller. The ventilation resistance due to the 40 is also reduced, and the ventilation area around the drain pan 40 is expanded to improve the ventilation efficiency. A gutter portion 45 is provided on the drain sheet 42 side of the drain pan 40 to receive the drain water generated by the heat exchanger 21.

The drain pan 40 is provided with three corners connecting to the corners of the outer body 11, and the first corner 481 is located at the rear right corner 213 of the heat exchanger 21 and drains water from the gutter 45. Is gathered, and a drain pump 15 for discharging the drain water is arranged. A drain pipe 16 is connected to the drain pump 15, and drain water is discharged to the outside by a drain hose (not shown) that is guided from the drain pump 15 to the drain pipe 16 and connected to the drain pipe 16. The second corner portion 482 is located at both end portions of the front right corner portion 214 of the heat exchanger 21 and receives the drain water generated by the heat transfer tube 22 and the U-shaped tube 221. The third corner portion 483 is located at the rear left corner portion 212 of the heat exchanger 21, and a float switch (not shown) is arranged.

The corners 481, 482, and 483 of the drain pan 40 have an attachment portion 421 formed by extending the drain sheet 42 to the lower side of the heat insulating member 41 and bending the tip outward. The drain pan 40 is fixed to the main body unit 10 by fixing the mounting portion 421 to the fixing portion 122 of the mounting bracket 12.

On the other hand, referring to FIG. 9, the left front portion of the drain pan 40 is aligned with the front left corner portion 211 of the heat exchanger 21 in order to draw a large amount of air K2, which is a part of the air K, into the heat exchanger front portion 218. It is formed in a rounded corner shape. A partition 46 for partitioning the second notch 442 and the fourth notch 444, which will be described later, is provided. The partition portion 46 has a plate shape extending forward from the left end having a rounded corner toward the outer cylinder 11, and the end portion of the partition portion 46 is fixed from the outer cylinder 11 side with screws. As a result, the air K sucked from the second suction port 732 exceeds the partition portion 46 and reaches the fourth notch portion 444, so that the drain pan 40 can be fixed without obstructing the ventilation of the air K2.

On the four sides of the drain pan 40, a first notch 441 and a second notch 442 formed to take in air K from the first suction port 731, the second suction port 732, and the third suction port 733 of the decorative panel 70, respectively. And a third notch 443, and a fourth notch 444 opened to send the taken-in air K to the front part 218 of the heat exchanger are provided. By forming the opening facing the suction port and the air outlet by cutting out, the heat insulating member 41 is not provided between the side plates 112 and 113. As a result, a wide opening is provided and the ventilation area is expanded.
≪Partition plate≫

A blower portion 343 of the fan casing 34 is inserted through the central opening 43 of the drain pan 40. Therefore, a partition plate 50 is provided to stably fix the fan casing 34 by closing the central opening 43 of the drain pan 40 and surrounding the periphery of the inserted fan casing 34. The partition plate 50 may have a size larger than the central opening 43 of the drain pan 40. The partition plate 50 fixes the screw holes 52 provided in the partition plate 50 to the boss 47 of the drain pan 40 with screws. The partition plate 50 is provided with a hole 51 for a blower portion for the blower portion 343 of the fan casing 34 for each blower fan 31. The partition plate 50 may be divided on a line connecting the centers of the blower holes 51 to sandwich the fan casing 34 from the front and rear, or simply pass the fan casing 34 through the blower holes 51 provided in the plate material. It may be. A sealing material (not shown) closes the gaps between the blower hole 51 and the blower 343 of the fan casing 34. As a result, the blower chamber F and the air guide path L are separated to prevent air from flowing to each other.
≪Cosmetic panel≫

With reference to FIG. 7, the panel portion 71 of the decorative panel 70 is provided with four outlets 74 in accordance with the fan casing 34. The outlet 74 is located below the heat exchanger front portion 218 of the heat exchanger 21. Further, as described above, the first suction port 731, the second suction port 732, and the third suction port 733 are provided. The first suction port 731 is provided between the outer body 11 and the rear portion 215 of the heat exchanger. The left-right width of the first suction port 731 is substantially the same as the width of the rear portion 215 of the heat exchanger. A suction air direction plate 734 is provided at the first suction port 731. The suction air direction plate 734 closes the first suction port 731 when the operation is stopped, and when the operation is started, the suction air direction plate 734 is rotated by a motor (not shown) to open the first suction port 731. Then, the sucked air K is rectified by being sucked along the back surface of the suction wind direction plate 734. It also has a role of preventing a short circuit by partitioning the sucked air K and the blown air H.

The second suction port 732 is provided between the outer body 11 and the left portion 216 of the heat exchanger. The front-rear width of the second suction port 732 is the width from the rear end of the left portion 216 of the heat exchanger to the front surface of the outer body 11. The third suction port 733 is provided between the outer body 11 and the right portion 217 of the heat exchanger. The second suction port 732 and the third suction port 733 do not have a suction air direction plate, but are provided with a crosspiece 735 for suppressing the insertion of fingers. The first suction port 731, the second suction port 732, and the third suction port 733 may be connected in a U shape to form one suction port.
≪Assembly≫

Next, the assembly of the indoor unit 1 will be described. In the main body unit 10, first, the top plate 111 side of the outer body 11 is placed on the assembly table, and the heat insulating material 13 is fitted inside the outer body 11. Then, the gas connecting pipe 222 and the liquid connecting pipe 223 of the assembled heat exchanger 21 are pulled out from the side plate 113, and the heat exchanger 21 is fixed to the top plate 111 by the attachment 27 and the attachment piece 251. Next, the assembled fan unit 30 is aligned with the center of the heat exchanger 21, and the motor mounting base (not shown) and the fan mounting base 37 are fixed to the top plate 111.

Next, the drain pump 15 is fixed to the side plate 113 and the drain pipe 16 is connected. The gutter portion 45 on the drain sheet 42 side of the drain pan 40 is aligned with the lower end 219 of the heat exchanger 21 and fitted so as to cover the bottom surface of the outer body 10, and the mounting portion 421 of the drain pan 40 is screwed to the fixing portion 122 of the mounting bracket. At this time, the blower portion 343 of the fan casing 34 is inserted through the central opening 43 of the drain pan 40. Next, the partition plate 50 covers the periphery of the blower portion 343 of the fan casing 34, and the screw holes 52 of the partition plate 50 are fixed to the boss 47 of the drain pan 40 with screws.

The main body unit 10 and the decorative panel 70 assembled as described above are individually packed, and the main body unit 10 is installed in the attic T2 by suspending it with a plurality of hanging bolts embedded in the attic T2 first. Will be done. Then, the decorative panel 70 is attached from the air conditioning chamber R side. At this time, the outlet 74 of the decorative panel 70 is aligned with the mouth of the blower portion 343 of the fan casing 34. Then, the screwed portion 721 of the decorative panel 70 is fixed to the fixing portion 122 of the mounting bracket 12 of the main body unit 10, and the indoor unit 1 is attached to the air conditioning chamber R by connecting the refrigerant pipe, the power supply line, and the signal line to the outdoor unit. Be done.

As shown in FIGS. 4, 6 and 8, the indoor unit 1 assembled as described above has a space between the drain pan 40 provided with the partition plate 50 and the panel portion 71 of the decorative panel 70. This space becomes a wind guide L that is a part of the air suction chamber S. Further, in the air suction chamber S, the rear suction chamber S1 that guides the air K sucked from the first suction port 731 to the rear part 215 of the heat exchanger and the air K sucked from the second suction port 732 are sent to the left part 216 of the heat exchanger. The left suction chamber S2 to guide, the right suction chamber S3 to guide the air K sucked from the third suction port 733 to the right part 217 of the heat exchanger, the first suction port 731, the second suction port 732, and the third suction port. A part of the air K sucked from the 733 is composed of a front suction chamber S4 which is guided to the front part 218 of the heat exchanger through the air guide L.
≪Action≫

Next, the operation of the one-way blowout type ceiling-embedded air conditioner configured as described above will be described.
≪Driving≫

When the indoor unit 1 is stopped, the suction air direction plate 734 is closed. Then, the compressor and fan motor of the outdoor unit (none of which are shown) and the fan motor 36 of the indoor unit 1 start operation according to a command of the remote controller (not shown) by the user U or a command of the air conditioning system. In the indoor unit 1, the suction air direction plate 734 is opened, and the blower fan 31 is rotated by the operation of the fan motor 36. The rotation of the blower fan 31 blows out the air in the blower portion 34 of the blower fan 31, so that the inside of the blower chamber F becomes a negative pressure, and the first suction port 731, the second suction port 732, and the second suction port provided in the decorative panel 70 3 The air K in the air conditioning chamber R is sucked from the suction port 733. The blower fan 31 is a sirocco fan type, and sucks air K from all directions of the truck-type heat exchanger 21 surrounding the fan unit 30.

With reference to FIGS. 6, 8 and 9, the air K sucked by the blower fan 31 flows into the air suction chamber S. Since the air suction chamber S is provided around the heat exchanger 21, the air K is taken into the heat exchanger 21 in a state where the air velocity and the air volume are less biased, and efficient heat exchange can be performed.

The air K1 sucked from the first suction port 731 in the air suction chamber S passes through the first notch 441 of the drain pan 40 and is guided from the rear suction chamber S1 to the rear part 215 of the heat exchanger. Further, the air K1 sucked from the second suction port 732 passes through the second notch 442 of the drain pan 40 and is guided from the left suction chamber S2 to the heat exchanger left 216. Further, the air K1 sucked from the third suction port 733 passes through the third notch 443 of the drain pan 40 and is guided from the right suction chamber S3 to the heat exchanger right 217.

The blower fan 31 also tries to suck air from the direction of the front part 218 of the heat exchanger, so that a part of the air K sucked from the first suction port 731, the second suction port 732, and the third suction port 733 is sucked. K2 flows into the air guide path L, passes through the air blowing portion 343 of the fan casing 34, passes through the fourth notch portion 444 of the drain pan 40, and is guided from the front suction chamber S4 to the heat exchanger front portion 218.

By providing the air guide path L between the drain pan 40 provided with the partition plate 50 and the decorative panel 70 in this way, the first suction port 731 and the first suction port 731 can be provided even if the suction port is not provided below the front portion 218 of the heat exchanger. A part of the air K2 sucked from the second suction port 732 and the third suction port 733 can be guided to the front part 218 of the heat exchanger, and the air K is sucked from the entire circumference of the truck-type heat exchanger 21. Is possible.

Further, by covering the periphery of the fan unit 30 with the truck-type heat exchanger 21, the area of the heat exchanger 21 facing the air suction chamber S increases. The distance between the heat exchanger 21 and the blower fan 31 is less likely to vary depending on the position, and the distance is almost constant as a whole, and the ventilation resistance is also reduced. Therefore, the air K passing through the heat exchanger 21 can pass through the heat exchanger 21 on the increased air suction chamber S side in a state where the ventilation resistance is small and the deviation between the air velocity and the air volume is small, and the refrigerant flowing through the heat exchanger 21. And heat exchange can be performed efficiently. The heat exchanger 21 is connected to a reversible refrigeration cycle circuit capable of cooling operation and heating operation (not shown), and functions to cool the air K as an evaporator during the cooling operation and as a condenser during the heating operation. It works and heats.

The air K is heat-exchanged with the refrigerant by the heat exchanger 21 to become blown air H, and the blown air H is sucked into the fan suction ports 344 of the four blower fans 31 arranged in the center of the truck-type heat exchanger 21. While passing through the long air passage 33 of the fan casing 34 from the impeller 32, the air is rectified in one direction, the wind direction is adjusted by the blowout air direction plate 38, and the air is blown out from the air outlet 74 to the air conditioning chamber R. As a result, the wind direction is fixed and it is possible to prevent a short circuit.
≪Structure≫

With reference to FIGS. 3 and 4, as described above, the indoor unit 1 has the first suction port 731 on one side of the long side facing the panel portion 71 of the decorative panel 70 and the first suction port 731 on the short side adjacent to the long side. The structure is such that the indoor air K is sucked from the two suction ports 732 and the third suction port 733, and the heat-exchanged blown air H is blown downward from the blower fan 31 arranged in the center of the indoor unit 1. Therefore, the wind flowing along the outer cylinder 11 in the main body unit 10 is the air in the air conditioning chamber R, and the temperature difference between the inside of the outer cylinder 11 and the circumference of the outer cylinder 11 is small. As a result, the occurrence of dew condensation generated due to the temperature difference between the inside and the outside of the outer body 11 which is a sheet metal is reduced, and dew condensation is caused by attaching a thin heat insulating sheet (not shown) instead of the thick foamed styrofoam heat insulating material 13. Can be prevented. Therefore, the inside of the side plates 112 and 113 of the outer body 11 directly becomes the air suction chamber S, and the side plates 112 and 113 do not require a thick heat insulating material 13, so that the size of the main body unit 10 can be reduced. Further, since the heat insulating material 13 is not provided, the internal parts of the main body unit 10, for example, the heat exchanger 21 can be enlarged.

Similarly, the heat insulating member 41 of the drain pan 40 may be provided only in the gutter portion 45 that receives the drain water generated in the heat exchanger 21 and the lower portion (first corner portion 481) of the drain pump 15 that discharges the gutter portion 45. Therefore, the heat insulating member 41 is not required on the outer body 11 side of the first notch portion 441, the second notch portion 442, the third notch portion 443, and the fourth notch portion 444 through which the air K passes, and a wide passage for suction is secured. can do. Further, by opening the center of the drain pan 40, less material is required to form the heat insulating member 41, and the fan casing 30 can be pulled out.

Next, Example 2 will be described. A common reference numeral is used for the parts common to those in the first embodiment. The indoor unit 1a of the ceiling-embedded air conditioner shown in FIGS. 10 to 14 has a fan casing 34a, a partition plate 50a, and an assembly structure different from those of the first embodiment.

The fan casing 34a has an accommodating portion 342 that accommodates the impeller 32 and a tubular blower portion 343a that is continuously formed from the accommodating portion 342 to the partition plate 50a. The partition plate 50a is provided with a hole 51a for a blower portion, and the blower portion 343a of the fan casing 34a is connected to the hole 51a for the blower portion. A connecting member 80 is provided between the blower hole 51a and the air outlet 74 of the decorative panel 70a.
≪Partition plate≫

The partition plate 50a closes the central opening 43 of the drain pan 40a and connects the blowing portion 343a and the connecting member 80 with the blowing portion hole 51a. Further, the partition plate 50a is formed according to the shape around the drain pan 40a. A mounting piece 53 formed in accordance with the mounting portion 421a of the drain pan 40a is provided.

The periphery of the blower hole 51a of the partition plate 50a is a fixed portion 56, and the flange portion 54 is provided from the fixed portion 56 to the blower portion 343a and a flange portion 54 erected at a position on the outer peripheral side by the wall thickness of the connecting member 80. Flange portions 54 are provided above and below the blower portion holes 51a according to the outer shapes of the blower portion 343a and the connecting member 80. The blower portion 343a and the connecting member 80 are inserted from above and below inside the flange portion 54. The blower portion 343a and the connecting member 80 abut on the fixing portion 56 and are supported by the flange portion 54 around the periphery. A sealing material 55 is provided in the gap between the blower portion 343a, the connecting member 80, and the flange portion 54. As a result, the blower portion 343a and the connecting member 80 are fixed to the partition plate 50a without any gap.
≪Connecting member≫

The connecting member 80 connects one blower fan 31a and the outlet 74 of the decorative panel 70a. Further, a connecting member 81 for two units may be provided to connect the two blower fans 31a shown in FIG. 11 to one large outlet 74a. Further, as shown in FIG. 14, one large outlet 74b may be provided on the decorative panel 70b, and a connecting member 82 for four units may be provided to connect the four blower fans 31a to the outlet 74b.

For example, as shown in FIGS. 10 and 11, the panel portion 71a includes a large outlet 74a in which two outlets 74 are connected in the center to form one opening by using a connecting member 81 for two units. Further, by using the connecting member 80 for the air outlets 74 at the left and right ends, a decorative panel 70a having a total of three air outlets 74 and 74a can be obtained. Further, although not shown, a decorative panel may be provided with two large outlets 74a having two outlets 74 on the right side and two outlets 74 on the left side as one opening by using the connecting member 81 for two units.

The cross-sectional view of the two-unit connecting member 81 shown in FIG. 12 is common to the connecting member 80. The connecting member 80 and the connecting member 81 for two units have a tubular connecting blowing portion 801 connected to the tip end portion 34a1 of the blowing portion 343a of the fan casing 34a, and outlets 74 and 74a at the lower end 80a of the connecting blowing portion 801. A fixed piece 802 to be abutted is provided. The connecting air blower 801 extends forward from the air blower hole 51a of the partition plate 50a until it is located below the heat exchanger front portion 218.

Further, the connecting member 81 for two units shown in FIGS. 10B and 13 includes two connecting blower portions 801. Each connecting blower 801 is connected by a connecting portion 811 at a portion 812 in the vicinity of the outlet 74a. The connecting portion 811 slightly protrudes toward the air guide L side, but the air K2 flowing through the air duct L passes through the space above the connecting portion 811 between the partition plate 50a and the connecting air passage 801 and passes through the front suction chamber S4. Because it is guided by, it does not interfere with the air K2.

The outer shape of the air outlet 74a is formed by combining the connecting blower 801 and the connecting portion 811 of the connecting member 81 for two units. As a result, the width of the air outlet 74 is more than twice as wide as that of the air outlet 74, so that the air outlet 74a is visually wide, and the user U is made to recognize that the air outlet has a sufficient amount. Further, since the man-hours for attaching the individual connecting members 80 can be the work of attaching one connecting member 81 for two units, the man-hours for attaching are halved.

A blowout wind direction plate 38a is provided at the lower end 80a of the connecting member 81 for two units. The blowout wind direction plate 38a has a length corresponding to the left and right width in the inner dimension of the connecting member 81 for two units. The height of the blown wind direction plate 38a is shortened at the lower part of the connecting portion 811 so as not to come into contact with the connecting portion 811 even if the direction is changed.
≪Assembly 1≫

The assembly of the indoor unit 1a will be described with reference to FIG. 10A. In the main body unit 10a of the indoor unit 1a, a heat exchanger 21 and a drain pan 40a are incorporated in the outer body 11. Then, the motor mounting base (not shown) of the fan unit 30a and the fan mounting base 37a are mounted on the partition plate 50a. At this time, the blower portion 343a of the fan casing 34a is inserted into the flange portion 54 of the partition plate 50a, brought into contact with the fixing portion 56, and attached by the sealing material 55 without a gap. Next, the connecting member 80 and the connecting member 81 for two units are inserted into the flange portion 54 of the partition plate 50a, brought into contact with the fixing portion 56, and attached by the sealing material 55 without a gap.

The partition plate 50a to which the fan unit 30a is attached is placed on the drain pan 40a, and the attachment portion 421a of the drain pan 40a and the attachment piece 53 of the partition plate 50a are simultaneously fixed to the fixing portion 122 of the attachment bracket 12 of the outer body 11.

Next, the main body unit 10a assembled in this way is installed in the attic T2 by suspending it with a plurality of hanging bolts embedded in the attic T2. Then, the decorative panel 70a is attached from the air conditioning chamber R side. At this time, the outlets 74 and 74a of the decorative panel 70a are aligned with the mouths of the connecting member 80 and the lower end 80a of the connecting member 81 for two units. Then, the screwed portion 721 of the decorative panel 70a is fixed to the fixing portion 122 of the mounting bracket 12 of the outer body 11, and the indoor unit 1a is attached to the air conditioning chamber R by connecting the refrigerant pipe, the power supply line, and the signal line to the outdoor unit. Be done.
≪Assembly 2≫

Further, the connecting member 80 and the connecting member 81 for two units are first attached to the outlets 74 and 74a of the decorative panel 70a, and the decorative panel 70a is fixed to the fixing portion 122 of the mounting bracket 12 of the outer body 11 and at the same time. The connecting member 80 and the connecting member 81 for two units may be inserted into the flange portion 54 of the partition plate 50a, brought into contact with the fixing portion 56, and attached by the sealing material 55 without a gap. In this case, the connecting member 80 and the connecting member 81 for two units are connected to the blower portion 343 of the fan casing 34 via the partition plate 50a. Dew and ventilation are eliminated by eliminating steps and gaps at the joints between the connecting member 80 and the connecting member 81 for two units and the outlets 74 and 74a.

In this embodiment, the fan unit 343 of the fan casing 34 of the first embodiment is divided into the blower portion 343a and the connecting member 80, so that the fan unit 30a can be assembled to the partition plate 50a, which facilitates positioning and improves assemblability. Will be done. Further, by attaching the connecting member 80 to the decorative panel 70a and fixing the decorative panel 70a to the main body unit 10a, there is no deviation or gap in the joint portion between the connecting member 80 and the air outlet 74, and dew or ventilation is prevented. There is no obstruction. Further, by connecting the adjacent connecting members 80, a wide outlet 74a is obtained. At the narrow outlet of the first embodiment, even if the air conditioner blows out a sufficient amount of air for air conditioning control, the user may recognize that the amount of air is insufficient. The wide air outlet 74a provides a visually wide air outlet, and makes it possible for the user U to recognize that the air conditioner is a ceiling-embedded air conditioner having a sufficient air volume. In addition, the man-hours for attaching the individual connecting members 80 are halved.

1 / 1a: Indoor unit, 10 / 10a: Main unit, 11: Outer body, 111: Top plate, 112/113: Side plate, 12: Mounting bracket, 13: Insulation material, 15: Drain pump 21: Heat exchanger, 215: Rear part of heat exchanger, 216: Left part of heat exchanger, 217: Right part of heat exchanger, 218: Front part of heat exchanger 30 / 30a: Fan unit, 31 / 31a: Blower fan, 32: Impeller, 33 : Blower, 34 / 34a: Fan casing, 343 / 343a: Blower, 35: Rotating shaft, 36: Fan motor, 38 / 38a: Blowout air direction plate 40 / 40a: Drain pan, 41: Insulation member, 42: Drain sheet , 43: Central opening, 441: 1st notch, 442: 2nd notch, 443: 3rd notch, 444: 4th notch, 45: Higashi, 46: Partition 50 / 50a: Partition plate , 51 / 51a: Blower hole, 53: Mounting piece, 54: Flange part, 56: Fixed part 70 / 70a: Decorative panel, 71 / 71a: Panel part, 72: Side wall part, 731: First suction port, 732: 2nd suction port, 733: 3rd suction port, 734: suction air direction plate, 74 / 74a: air outlet 80: connecting member, 801: connecting air blower, 81: connecting member for 2 units, 811: connecting part R : Air conditioning room, T1: Ceiling, T2: Behind the ceiling, F: Blower room, S: Air suction room, L air guide, U: User, K / K1 / K2: Air, H: Blow air

Claims (1)

A rectangular top plate, a box-shaped outer body with side plates extending downward from the four sides of the top plate, a main unit with a heat exchanger inside the outer body, and a first side on one side that sucks in indoor air . A ceiling-embedded air conditioner equipped with a suction port and an outlet for blowing out air that has been heat-exchanged by the heat exchanger on the other side facing the one side, and a decorative panel attached to the bottom surface of the main body unit. In
The main body unit is provided with a fan unit having a fan motor and a sirocco fan pivotally supported by the rotation shaft of the fan motor, and the heat exchanger surrounds the front, rear, left and right sides of the fan unit to exchange heat. A partition plate is provided on the lower surface of the vessel, and an air suction chamber into which indoor air sucked from the suction port flows is formed between the partition plate and the decorative panel and between the heat exchanger and the side plate. A ceiling-embedded air conditioner that features this.

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