JP7275478B2 - Ceiling-mounted air conditioner - Google Patents

Description

The present invention relates to a ceiling-embedded air conditioner.

A ceiling-embedded air conditioner (indoor unit) installed behind the ceiling in an air-conditioned room is connected to an outdoor unit installed outdoors by refrigerant pipes to form a refrigerant circuit. A ceiling-mounted air conditioner consists of a main unit installed in the ceiling, an electrical component box attached to the side of the main unit, and an air inlet and outlet that cover the lower surface of the main unit. and a decorative panel attached to.

The main unit includes a box-shaped housing, a heat exchanger arranged inside the housing, a sirocco fan arranged near the heat exchanger, and a drain pan for collecting dew generated in the heat exchanger. Prepare. The sirocco fan draws in air through a heat exchanger from a suction port of a decorative panel, and blows the air heat-exchanged with a refrigerant into a room from a blowout port (Patent Document 1).

The decorative panel generally has a horizontal airflow direction plate and a vertical airflow direction plate attached to the air outlet so that the blown air can be guided in the vertical direction and the horizontal direction.

JP-A-2000-213767

By the way, in order to increase the heat exchange capacity by sucking more air, it is necessary to increase the opening area of the suction port of the decorative panel. However, if the opening area of the suction port is increased, the size of the decorative panel is increased. Moreover, if the opening area of the suction port is increased, the opening area of the blowout port formed on the lower surface of the decorative panel may have to be decreased.

An object of the present invention is to increase the heat exchange capacity by increasing the opening area of the air inlet without increasing the size of the decorative panel and reducing the opening area of the air outlet. It is to provide an air conditioner.

In order to solve the above-described problems, the invention according to claim 1 is a ceiling-mounted air conditioner comprising a main unit and a decorative panel attached to the bottom surface of the main unit and having an air inlet and an air outlet, wherein: The main unit has a box-shaped housing, a heat exchanger arranged inside the housing, and a blowout pipe, and the heat exchange is carried out from the suction port of the decorative panel arranged inside the housing. a fan unit having a sirocco fan that sucks air through a heat exchanger and sends the air blown out from the blowout cylinder to the blowout port; and a drain pan that collects dew generated in the heat exchanger, and the decorative panel has a rectangular shape. The suction port is formed along the long side in the left-right direction on the rear end side of the lower surface of the decorative panel, and a rear wall is formed at the rear end of the decorative panel, and the rear wall communicates with the suction port. and an auxiliary suction port is formed, and the suction port is covered with a grill.
The invention according to claim 2 is the ceiling-mounted air conditioner according to claim 1, wherein the central portion of the grill in the left-right direction is positioned below the left end side of the grill and the right end side of the grill. A first slanted surface is formed between a center portion of the grill and a left end side of the grill, and a second slanted surface is formed between a center portion of the grill and a right end side of the grill. It is characterized by
The invention according to claim 3 is the ceiling-embedded air conditioner according to claim 1 or 2 , wherein the grille is arranged so as to be sandwiched between the underside cover of the decorative panel and the auxiliary air inlet. characterized by

According to the present invention, in addition to the suction port formed in the lateral direction on the rear end side of the lower surface of the decorative panel, the auxiliary suction port communicating with the suction port is formed in the back wall. Therefore, since the opening area of the auxiliary suction port is added to the opening area of the suction port, a large opening area can be realized. Therefore, the heat exchange capacity can be increased by increasing the opening area of the suction port without reducing the opening area of the blow port and without increasing the size of the decorative panel.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing an installation state of a ceiling-embedded air conditioner according to an embodiment of the present invention; FIG. 2 is a perspective view of the ceiling-embedded air conditioner of FIG. 1 as viewed from below; FIG. 2 is a perspective view of the ceiling-embedded air conditioner of FIG. 1 as seen from the rear end; Fig. 3 is a perspective view of the ceiling-embedded air conditioner of Fig. 2 with the decorative panel removed; FIG. 3 is an exploded perspective view of the main body unit of the present embodiment as viewed from below; It is a top perspective view of a drain pan. It is a perspective view of a reinforcing metal fitting. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2; FIG. 3 is a cross-sectional view taken along the line BB of FIG. 2; It is a partial sectional view of the undersurface of a decorative panel. FIG. 9 is a cross-sectional view taken along line CC of FIG. 8;

A ceiling-mounted air conditioner 100 according to an embodiment of the present invention will be described below. As shown in FIG. 1, the ceiling-mounted air conditioner 100 is attached to the ceiling T1 of the air conditioning room R, and is connected by refrigerant pipes to an outdoor unit (not shown) installed outdoors to form a refrigerant circuit. do. The ceiling-mounted air conditioner 100 has a box-shaped main unit 200 arranged in the ceiling space T2, and a decorative panel 300 attached to the bottom surface of the main unit 200 so as to be exposed to the air conditioning room R side. An electrical component box 400 in which a control circuit is mounted is attached to the side surface of the main unit 200 .

As shown in FIGS. 2 and 3, the decorative panel 300 has a rectangular shape with a front end 301 and a rear end 302 longer than a left end 303 and a right end 304 . Inside the bottom cover 370 facing the air conditioning room R shown in FIG.

The air blown out from the blow-out guide tube 310 on the left end 303 side is blown out from the blow-out port 306 of the rotary plate 380L. This rotating plate 380L can be rotated 90 degrees in the direction of arrow a from the state shown in FIG. be done. In addition, the vertical blowing direction of the wind is guided by the vertical wind direction plate 311 that rotates together with the rotary plate 380L.

The blowing direction of the air blown from the central blow-off guide cylinders 320, 330 is guided by respective left and right wind direction plates 392, 393 of a lower guide plate 390 described later, merged by the lower guide plate 390 described later, and then common. The air is blown out from the outlet 307 . The vertical blowing direction of the wind is guided by the vertical wind direction plate 321 .

The air blown out from the blow-out guide tube 340 on the right end 304 side is blown out from the blow-out port 308 of the rotary plate 380R. This rotating plate 380R can be rotated 90 degrees in the direction of arrow b from the state shown in FIG. be done. In addition, the vertical blowing direction of the wind is guided by the vertical wind direction plate 341 that rotates together with the rotary plate 380R.

A lower surface cover 370 of the decorative panel 300 is formed by a lower surface inner cover 371 and a lower surface outer peripheral cover 372 . The lower inner cover 371 covers the inside surrounded by the rotating plates 380L, 380R, the outlet 307, and the intake grille 360. As shown in FIG. The lower outer peripheral cover 372 covers the rotating plates 380L, 380R, the air outlet 307, the intake grille 360, and the lower inner cover 371. As shown in FIG.

On the side of the rear end 302 of the lower surface cover 370 of the decorative panel 300, a laterally elongated suction port 350 is formed from the left end 303 to the right end 304. The suction port 350 is formed by a laterally elongated suction grille 360. covered.

As shown in FIG. 3 , the intake grille 360 has a center portion 361 in the left-right direction protruding below the left end 303 and the right end 304 . A first inclined surface 362 is formed between the central portion 361 and the left end 303 of the intake grille 360 , and a second inclined surface 363 is formed between the central portion 361 and the right end 304 . The first inclined surface 362 and the second inclined surface 363 have the same length in the horizontal direction, but are set shorter than the length in the horizontal direction of the central portion 361 . A rear wall 305 is formed at the rear end 302 of the decorative panel 300 , and an auxiliary suction port 351 communicating with the suction port 350 is formed from the left end 303 side to the right end 304 side of the rear wall 305 . The auxiliary suction port 351 is divided into a plurality of parts by the struts 305a.

The housing 500 has a box shape formed by a rectangular top plate 510 , a front plate 520 extending downward from the four sides of the top plate 510 , a rear plate 530 , a left side plate 540 and a right side plate 550 . An electrical component box 400 and a drain pipe 551 are attached to the right side plate 550 . Further, two mounting brackets 560 are attached to the outside of the left side plate 540 and the outside of the top plate 510 of the right side plate 550, respectively. The main unit 200 is installed in the ceiling space T2 by suspending the mounting bracket 560 with a suspension bolt (not shown) fixed to the ceiling space T2.

The heat exchanger 600 has a first heat exchanger 610 and a second heat exchanger 620 housed in the housing 500 . The first heat exchanger 610 is arranged on the front plate 520 side of the housing 500 , and the second heat exchanger 620 is arranged on the rear plate 530 side. Upper ends of the first heat exchanger 610 and the second heat exchanger 620 are attached to the top plate 510 of the housing 500 . A motor shaft support plate 630 for supporting a rotation shaft 712 (to be described later) is attached between the left side plate 540 side of each of the first heat exchanger 610 and the second heat exchanger 620 . and the second heat exchanger 620 on the side of the right side plate 550, a motor shaft support plate 640 that supports a rotation shaft 713, which will be described later, is attached.

The fan unit 700 includes a double shaft fan motor 710 fixed to a motor mounting base 711 , two impellers 721 and 722 fixed to one rotating shaft 712 of the fan motor 710 , and the motor 710 . It has two impellers 723 and 724 fixed to the other rotating shaft 713, and four fan casings 731-734 that individually surround each impeller 721-724. The fan casings 731 to 734 include upper surface attachment portions 731a to 734a attached to the top plate 510 of the housing 500, suction openings 731b to 734b formed on both side surfaces, and blowout cylinders formed to protrude downward. 731c to 734c, respectively. The impeller 721 and the fan casing 731, the impeller 722 and the fan casing 732, the impeller 723 and the fan casing 733, and the impeller 724 and the fan casing 734 form sirocco fans, respectively.

The drain pan 800 is made of a heat insulating material 810 made of polystyrene foam. In the heat insulating material 810, four blowing openings 821 to 824 are formed in a line in the left-right direction, penetrating from the upper surface 810a to the lower surface 810b. As shown in FIG. 6, the upper surface 810a of the drain pan 800 is surrounded by a peripheral wall 830, and has a substantially rectangular shape with a front end 831 and a rear end 832 as long sides.

A groove 841 for receiving dew generated in the first heat exchanger 610 is formed between the front end portion 831 of the peripheral wall 830 and the blowout openings 821 to 824 on the upper surface 810a of the heat insulating material 810. A groove 842 for receiving dew generated in the second heat exchanger 620 is formed between the portion 832 and the blowing openings 821 to 824 . A groove 843 is also formed inside the right end portion 833 of the peripheral wall 830 . Furthermore, a drain tank 844 is formed on the inner side of the peripheral wall 830 so as to connect to the far right end of the upper surface 810 a of the heat insulating material 810 . The groove 841 communicates with the groove 843 , and the grooves 842 and 843 communicate with the drain tank 844 .

In addition, a reinforcing metal fitting 870 having a shape as shown in FIG. This reinforcing metal fitting 870 includes a long piece 871 corresponding to the front end portion 831 of the drain pan 800, a long piece 872 corresponding to the rear end portion 832, a short piece 873 connecting the left side of the long piece 871 and the long piece 872 in FIG. It has a short piece 874 connecting the right side of the long piece 872 in FIG.

The reinforcing metal fittings 870 are embedded in the heat insulating material 810 by positioning the reinforcing metal fittings 870 in advance in a mold for molding the heat insulating material 810, and then foaming the foamed polystyrene. Thereby, the reinforcing metal fitting 870 is integrated with the lower surface 810 b of the heat insulating material 810 .

The blowout guide cylinder 310 of the decorative panel 300 is formed so as to be connected to the blowout opening 821 of the drain pan 800, the blowout guide cylinder 320 is formed so as to be connected to the blowout opening 822 of the drain pan 800, and the blowout guide cylinder 330 is formed to be connected to the drain pan 800. The blowout guide cylinder 340 is formed so as to be connected to the blowout opening 823 , and the blowout guide cylinder 340 is formed so as to be connected to the blowout opening 824 of the drain pan 800 .

Here, referring to FIGS. 8 to 11, the part of the blow guide tube 320 will be described as a representative. In FIG. 8, the vertical wind direction plate 321 and the left and right wind direction plates 322 and 332 are omitted.

The lower surface cover 370 is formed by the lower surface middle cover 371 and the lower surface peripheral cover 372 as described above. The lower middle cover 371 protrudes downward from the lower peripheral cover 372 . A front portion 372a of a lower peripheral cover 372 covers the lower portion of the front portion 305a of the guide tube holder 305, and a lower inner cover 371 covers the rear portion 305b of the guide tube holder 305 and the lower portion of the lower guide plate 390.

The air outlet guide tube 320 has an upper end opening 320a connected to the air outlet tube 732c of the fan casing 732 and the air outlet opening 822 of the drain pan 800, and a curved air passage S4 between the upper end opening 320a and the lower end opening 320b. It is slanted so as to face downward on the side of 301, that is, diagonally downward to the front. The upper end 390a of the lower guide plate 390 communicates with the blow-out guide cylinders 320 and 330, and the curved air passage S5 between the upper end 390a and the lower end 390b continues to the air passage S4 and is similar to the inclination of the air passage S4. is inclined downward on the front end 301 side.

The front end 320c of the blow guide tube 320 is engaged with the rear end 372a1 of the front portion 372a of the lower peripheral cover 372. As shown in FIG. The lower end 390b of the lower guide plate 390 is engaged with the front end 371a of the lower inner cover 371. As shown in FIG. The blowout port 307 between the lower end 390b of the lower guide plate 390 and the front end 320c of the blowout guide tube 320 faces downward toward the front end 301 of the decorative panel 300. As shown in FIG.

The lower middle cover 371 has a flat portion 371b extending from the front end 371a toward the rear end 302 of the decorative panel 300, and a rising portion 371c extending obliquely upward from the rear end 302 of the flat portion 371b. A folded portion 371d is formed continuously on the rear end 302 side of the rising portion 371c, and a rising portion 371e rising from the rear end 302 side of the folded portion 371d is formed and extends in the direction of the rear end 302 from the rising portion 371e. A flat screw receiving portion 371f is formed. The screw receiving portion 371f is the rear end of the lower inner cover 371. As shown in FIG.

The lower inner cover 371 is attached by engaging the front end 371 a with the front left end 394 and the front right end 395 of the lower end 390 b of the lower guide plate 390 , and then engaging the rear screw receiving portion 371 f with the rear end of the rear portion 305 b of the guide tube holder 305 . 305b1 is fixed from below with a screw B1.

Now, assembly of the ceiling-mounted air conditioner 100 will be described. First, the housing 500 of the main unit 200 is placed on the assembly table with the top plate 510 side down, and the assembled first heat exchanger 610 and second heat exchanger 620 are screwed to the inside of the top plate 510. do.

Next, after aligning the assembled fan unit 700 between the first heat exchanger 610 and the second heat exchanger 620, the motor mount 711 of the fan motor 710 is screwed to the top panel 510, One rotating shaft 712 of the fan motor 710 is supported by a rotating shaft support plate 630 , and the other rotating shaft 713 is supported by a rotating shaft support plate 640 . Further, the upper mounting portions 731a to 734a of the fan casings 731 to 734 are screwed to the top plate 510. As shown in FIG. Further, rotating shaft support plates 630 and 640 are attached to the first heat exchanger 610 and the second heat exchanger 620, respectively. Then, the drain pump 900 is attached inside the right side plate 550 of the housing 500, and its discharge port 920 is connected to the drain pipe 551 shown in FIGS.

Next, after aligning the groove 841 of the upper surface 810 a of the drain pan 800 with the lower portion of the first heat exchanger 610 and aligning the groove 842 with the lower portion of the second heat exchanger 620 , this drain pan 800 is attached to the housing 500 . The short side 873 of the reinforcing metal fitting 870 is screwed to the left side plate 540 of the housing 500 , and the mounting pieces 875 and 876 are screwed to the right side plate 550 by pushing in from the bottom to the inside.

As described above, the blowout cylinders 731c to 734c of the four fan casings 731 to 734 of the fan unit 700 enter into the upper surface 810a side of the four blowout openings 821 to 824 of the drain pan 800, and the blowout openings 821 to 824 and the blowout cylinders 731c to 734c are individually communicated. Also, the suction port 910 of the drain pump 900 is located in the drain tank 844 of the drain pan 800 .

Since the assembled main unit 200 is packed separately from the decorative panel 300, when installing the ceiling-mounted air conditioner 100, the packing is first unpacked, and then it is embedded in the ceiling space T2. The main unit 200 is hung from a plurality of hanging bolts by mounting metal fittings 560 and installed in the ceiling space T2. Then, the decorative panel 300 is attached from the air conditioning room R side shown in FIG.

At this time, the upper end opening 322 of the blowout guide cylinder 320 of the decorative panel 300 is inserted into the blowout opening 822 from the lower surface 810b of the drain pan 800 to communicate with the blowout cylinder 732c of the fan casing 732 . Similarly, the remaining blow-out guide cylinders 310, 330, 340 are inserted into the blow-out openings 821, 823, 824 of the drain pan 800 and communicated with the blow-out cylinders 731c, 733c, 734c of the fan casings 731, 733, 734, respectively. Then, the decorative panel 300 is screwed to the housing 500 of the main unit 200, and a refrigerant pipe, a power line, a signal line, and the like (not shown) are connected.

Ceiling-mounted air conditioner 100 assembled as described above includes, as shown in FIG. Ventilation path S2 between housing 500 and front plate 520 communicates with ventilation path S3 between lower surface 810b of drain pan 800 and decorative panel 300. As shown in FIG. Blow-out guide cylinders 310 to 340 are arranged in the air passage S3.

As described above, in the ceiling-embedded air conditioner 100 of the present embodiment, the air sucked from the suction port 350 of the decorative panel 300 reaches the second heat exchanger 620 through the air passage S1. Further, the air sucked from the suction port 350 of the decorative panel 300 reaches the first heat exchanger 610 on the front side through the ventilation passages S3 and S2 in sequence. Therefore, even if the first heat exchanger 610 is arranged at a location farther from the suction port 350 than the second heat exchanger 620 in order to increase the heat exchange capacity, the first heat exchanger 61 is sufficiently A large amount of air can be pumped in.

Further, the air passages S3 and S4 are curved and inclined so that the suction port 307 of the lower guide plate 390 faces obliquely forward and downward. Therefore, the flow of air blown out by the rotation of the impellers 722, 332 is less likely to be resisted by the blow-out guide cylinders 320, 330, and the reaching distance of the blown air flow to the front of the ceiling-mounted air conditioner 100 is extended. becomes possible.

Further, in the decorative panel 300, a suction port 350 is formed in the left-right direction from the left end 303 side of the rear end 302 side of the lower surface 370 to the right end 304 side, and the back wall 305 of the rear end 302 communicates with the suction port 350. A suction port 351 is formed. Since the auxiliary suction port 351 is formed in addition to the suction port 350 in this way, the opening area of the auxiliary suction port 351 is added to the opening area of the suction port 350, so that a large opening area can be realized. Therefore, the heat exchange capacity can be increased without reducing the opening area of the outlets 306 to 308 and without increasing the size of the decorative panel. In addition, since the auxiliary suction port 351 of the inner wall surface 305 is divided into a plurality of parts by the struts 305a, it is possible to prevent the strength of the inner wall surface 305 from becoming insufficient due to the formation of the auxiliary suction ports 351 . In addition, since the first inclined surface 362 and the second inclined surface 363 are formed on both sides of the central portion 361 of the grille 360, the central portion 361 not only draws in air from directly below the ceiling-mounted air conditioner. , slanted surfaces 362 and 363 suck in air also from oblique sides. The inclination of the first inclined surface 362 and the second inclined surface 363 is provided from the design point of view, but since they are shorter than the central portion 361, the amount of air sucked from the central portion 361 does not decrease significantly. . In addition, another suction port 352 may be formed on the side of the lower inner cover 371 of the suction grille 360 as shown in FIG.

100: Ceiling-embedded air conditioner 200: Main unit 300: Decorative panel 305: Back wall 310 to 340: Blow-out guide tube 310b, 320b, 340b: Lower end opening 322: Left/right wind direction plate 323: Guide tube , 324: lower guide plate, 311, 321, 341: vertical wind direction plate, 350: suction port, 351: auxiliary suction port, 360: suction grille, 370: lower surface cover, 371: lower surface middle cover, 372: lower surface peripheral cover, 380, 390: Rotating plate 400: Electrical component box 500: Housing 510: Top plate 520: Front plate 530: Rear plate 540: Left side plate 550: Right side plate 560: Mounting bracket 551: Hose 600 : heat exchanger 610: first heat exchanger 620: second heat exchanger 630, 640: motor shaft support plate 700: fan unit 710: fan motor 721 to 724: impeller 731 to 734: Fan casing, 731c to 734c: blowout pipe 800: drain pan, 810: heat insulating material, 821 to 824: blowout opening, 841 to 843: groove, 844: drain tank, 870: reinforcing metal fitting 900: drain pump

Claims (3)

A ceiling-embedded air conditioner comprising a main unit and a decorative panel attached to the bottom surface of the main unit and having an air inlet and an air outlet,
The main unit has a box-shaped housing, a heat exchanger arranged inside the housing, and a blowout cylinder, and is arranged inside the housing so that the heat is discharged from the suction port of the decorative panel. A fan unit having a sirocco fan that sucks air through an exchanger and sends the air blown out from the blowout cylinder to the blowout port, and a drain pan that collects dew generated in the heat exchanger,
The decorative panel has a rectangular shape,
The suction port is formed along the long side in the left-right direction on the rear end side of the lower surface of the decorative panel. A rear wall is formed at the rear end of the decorative panel, and the rear wall is an auxiliary suction port communicating with the suction port. A ceiling-mounted air conditioner, wherein a mouth is formed and the air intake is covered with a grill. In the ceiling-mounted air conditioner according to claim 1,
A center portion of the grill in the left-right direction projects downward from a left end side of the grill and a right end side of the grill, and a first inclined surface is formed between the center portion of the grill and the left end side of the grill. and a second inclined surface is formed between the center portion of the grill and the right end side of the grill. 3. The ceiling-embedded air conditioner according to claim 1 or 2 , wherein the grille is arranged so as to be sandwiched between the cover in the lower surface of the decorative panel and the auxiliary air inlet. harmony machine.

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