JP7012827B2 - Outdoor unit of air conditioner - Google Patents

Description

The present invention relates to an outdoor unit of an air conditioner and to a configuration of a bell mouth.

Conventionally, an outdoor unit of an air conditioner is configured to exchange heat between a refrigerant and outside air in a heat exchanger. Inside the outdoor unit, a fan that supplies outside air to the heat exchanger is provided, and a bell mouth is provided on the front surface of the fan. The outside air that has exchanged heat with the refrigerant in the heat exchanger is exhausted to the outside of the outdoor unit via the bell mouth.

The bell mouth of the outdoor unit described in Patent Document 1 has a bell-shaped opening having an opening in the center and a flat surface portion fixed to the front surface of the casing of the outdoor unit. The opening of the bell mouth has an R portion located on the upstream side in the air flow direction, an R portion located on the downstream side in the air flow direction, and a straight portion located between these R portions. It is formed in an annular shape as a whole.

Japanese Unexamined Patent Publication No. 2013-96622

When the outdoor unit is used in cold regions, snow may accumulate on the top plate of the outdoor unit, and as the temperature rises, the snow on the top plate melts, and the melted snow water flows from the top of the outdoor unit to the front panel. In some cases. In addition, not only in cold regions, rain may blow from the front side of the outdoor unit when it rains. In such a case, water will flow into the opening of the bell mouth attached to the front panel. Then, in the bell mouth described in Patent Document 1, water flows downward along the edge of the opening, and water is concentrated and stored in the lower end portion of the bell mouth.

In cold regions, the water stored in the lower end of the bell mouth freezes due to the outside air, and then water may further adhere to the frozen portion and ice may grow. If the ice grows at the lower end of the bell mouth, the fan may come into contact with the ice as the fan rotates, causing abnormal noise and damage to the fan. Further, if water continues to be stored in the lower end of the bell mouth, the casing of the outdoor unit and the contents of the outdoor unit may be adversely affected. As described above, the accumulation of water at the lower end of the bell mouth has been a factor of lowering the reliability of the outdoor unit.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to suppress the accumulation of water at the lower end of a bell mouth and to provide a highly reliable outdoor unit of an air conditioner. do.

The outdoor unit of the air conditioner according to the present invention is an outdoor unit of an air conditioner including a bottom plate, a heat exchanger, a fan for supplying air to the heat exchanger, and an annular bell mouth. The heat exchanger is arranged on the bottom plate on the back side of the outdoor unit, the bell mouth is provided on the bottom plate at the opening of the front panel arranged on the front side of the outdoor unit, and the fan is provided. The suction port located in front of the heat exchanger and into which the air guided by the fan in the bell mouth flows is located on the back side of the outdoor unit, and the outlet from which air flows out in the bell mouth is the front surface of the outdoor unit. An inclined groove is formed at the lower end of the bell mouth , which is located on the side and is inclined downward only toward the rear side of the outdoor unit, and is formed at the rear end of the outdoor unit in the bottom plate. A drain hole is formed, a drain channel for guiding water to the drain hole is formed, and the end portion on the back surface side of the inclined groove faces the drain hole .

According to the outdoor unit of the air conditioner according to the present invention, even when water enters from the front side of the outdoor unit, the water does not accumulate in the lower end portion of the bell mouth. Therefore, a highly reliable outdoor unit can be obtained.

It is an exploded perspective view of the outdoor unit which concerns on embodiment of this invention. It is a front view of the front panel of the outdoor unit which concerns on embodiment of this invention. It is sectional drawing of the bell mouth of the outdoor unit which concerns on embodiment of this invention. It is an enlarged sectional view of the lower end part of the bell mouth of the outdoor unit which concerns on embodiment of this invention. It is a figure which shows the inside of the outdoor unit which concerns on embodiment of this invention from the back side. It is a perspective view of the bottom plate of the outdoor unit which concerns on embodiment of this invention. It is a top view of the bottom surface of the outdoor unit which concerns on embodiment of this invention. FIG. 5 is an enlarged view showing a portion indicated by reference numeral C in FIG. FIG. 7 is a cross-sectional view taken along the line DD of FIG.

Hereinafter, embodiments of the outdoor unit of the air conditioner in the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below. Further, in the following drawings, the size and shape of each component may differ from the actual device.

Embodiment.
FIG. 1 is an exploded perspective view of an outdoor unit according to an embodiment of the present invention. FIG. 2 is a front view of the front panel of the outdoor unit according to the embodiment of the present invention. The outdoor unit 1 has a bottom plate 10, a front panel 20, a side panel 30, a top plate panel 40, and a heat exchanger 50. The outer shell of the outdoor unit 1 is formed by the bottom plate 10, the front panel 20, the side panel 30, and the top plate panel 40. The bottom plate 10 is located on the bottom surface of the outdoor unit 1. The front panel 20 has a front surface portion 20A located on the front surface of the outdoor unit 1 and a left side surface portion 20B located on the left side surface of the outdoor unit 1. The side panel 30 is located on the right side surface of the outdoor unit 1. The top plate panel 40 is located on the upper surface of the outdoor unit. The front panel 20 and the side panel 30 are fixed to the bottom plate 10. The heat exchanger 50 has an L-shape and is arranged on the bottom plate 10 so as to be located on the back surface and the left side surface of the outdoor unit 1.

The inside of the outdoor unit 1 is divided into a blower chamber 70 and a machine room 80 by a partition plate 60. The blower chamber 70 is located on the left side of the outdoor unit 1, and the machine room 80 is located on the right side of the outdoor unit 1. A fan 71 is provided in the blower chamber 70. The fan 71 is located in front of the heat exchanger 50. By rotating the fan 71, outside air, that is, gas is supplied to the heat exchanger 50. The compressor 81 is housed in the machine room 80. The compressor 81 is attached to the bottom plate 10. An electric component box 82 is installed above the compressor 81. An opening 21 is formed in the front portion 20A of the front panel 20, and the bell mouth 90 is fixed to the opening 21. The bell mouth 90 has an annular shape as a whole. A fan guard 72 is provided on the front side of the bell mouth 90. In FIG. 2, the lowermost end portion of the lower end portion of the bell mouth 90 located closest to the bottom plate 10 of the outdoor unit 1 is indicated by reference numeral 90C.

FIG. 3 is a cross-sectional view of a bell mouth of an outdoor unit according to an embodiment of the present invention. FIG. 3 shows the bell mouth 90 cut at the position indicated by the line AA in FIG. 2 and shown from the direction of the arrow in FIG. In FIG. 3, the air flow when the fan 71 shown in FIGS. 1 and 2 is being driven is indicated by a white arrow. The suction port 90A into which air flows into the bell mouth 90 faces the fan 71 shown in FIG. 1, and the outlet 90B into which air flows out from the bell mouth 90 faces the fan guard 72 shown in FIG. That is, the suction port 90A is located on the back side of the outdoor unit 1, and the outlet 90B is located on the front side of the outdoor unit 1. The bell mouth 90 has an upstream curved portion 91, a downstream curved portion 92, and a connecting portion 93.

The upstream curved portion 91 is located on the suction port 90A side, that is, on the back side of the outdoor unit 1. The upstream curved portion 91 is curved so that the diameter gradually decreases from the suction port 90A toward the outlet 90B. In other words, the diameter of the upstream curved portion 91 gradually decreases from the back surface side to the front surface side of the outdoor unit 1. The downstream curved portion 92 is located on the outlet 90B side, that is, on the front side of the outdoor unit 1. The downstream curved portion 92 is curved so that the diameter gradually increases from the suction port 90A toward the outlet 90B. In other words, the diameter of the downstream curved portion 92 gradually increases from the back surface side to the front surface side of the outdoor unit 1. The connecting portion 93 is located between the upstream curved portion 91 and the downstream curved portion 92, and connects the portion having the smallest diameter in the upstream curved portion 91 and the portion having the smallest diameter in the downstream curved portion 92. .. The diameter of the connecting portion 93 is constant. The diameter of the bell mouth 90 gradually increases from both ends of the outdoor unit 1 in the connecting portion 93 in the front-rear direction toward the suction port 90A and the outlet 90B.

FIG. 4 is an enlarged cross-sectional view of the lower end of the bell mouth of the outdoor unit according to the embodiment of the present invention. FIG. 4 shows an enlarged portion indicated by reference numeral B in FIG. FIG. 5 is a perspective view showing the inside of the outdoor unit 1 from the rear side. In FIG. 5, the partition plate 60, the fan 71, the compressor 81, the electric component box 82, and the like are omitted. As shown in FIGS. 4 and 5, an inclined groove 94 is formed at the lower end of the bell mouth 90. The inclined groove 94 is formed over the connecting portion 93 and the upstream curved portion 91 at the lowermost end portion of the bell mouth 90 indicated by reference numeral 90C in FIG. 2 described above. The inclined groove 94 is radially outward from the end of the connecting portion 93 on the side continuous with the downstream curved portion 92 toward the end of the upstream curved portion 91 on the suction port 90A side. It is inclined in the extending direction, that is, downward. As described above, the inclined groove 94 is formed so as to incline downward toward the back surface side of the outdoor unit 1 at the lowermost end portion 90C which is the lower end portion closest to the bottom plate 10 of the bell mouth 90.

FIG. 6 is a perspective view of the bottom plate of the outdoor unit according to the embodiment of the present invention. FIG. 7 is a plan view of the bottom surface of the outdoor unit according to the embodiment of the present invention. 6 and 7 show the bottom plate 10 from the inside of the outdoor unit 1. The bottom plate 10 is a thin plate-shaped member and has a rectangular shape. A flange 11, a flange 12, a flange 13, and a flange 14 are formed on the edge of the bottom plate 10 in the upward direction. The flange 11 and the flange 12 extend in parallel. The flange 13 and the flange 14 intersect the flange 11 and the flange 12 and extend in parallel. The flange 11 and the flange 12 are longer than the flange 13 and the flange 14.

As shown in FIG. 5, the flange 11 extends in the left-right direction of the outdoor unit 1 on the front side of the outdoor unit 1. The flange 12 extends in the left-right direction of the outdoor unit 1 on the back side of the outdoor unit 1. The flange 13 extends in the front-rear direction of the outdoor unit 1 at the left end portion of the outdoor unit 1. The flange 14 extends in the front-rear direction of the outdoor unit 1 at the right end of the outdoor unit 1. That is, the longitudinal direction of the bottom plate 10 coincides with the left-right direction of the outdoor unit 1, and the lateral direction of the bottom plate 10 coincides with the front-rear direction of the outdoor unit 1.

At the end of the bottom plate 10 on the side where the flange 12 is formed, a circular drain hole 15 is formed at substantially the center of the bottom plate 10 in the longitudinal direction. As shown in FIG. 5, the drain hole 15 is located substantially in the center of the end portion on the back surface side of the outdoor unit 1.

The bottom plate 10 is formed with a first bank portion 101, a second bank portion 102, a third bank portion 103, a fourth bank portion 104, and a fifth bank portion 105. The first bank portion 101, the second bank portion 102, the third bank portion 103, the fourth bank portion 104, and the fifth bank portion 105 are raised upward.

The first bank portion 101 extends along the longitudinal direction of the bottom plate 10 at the side end portion on the side where the flange 11 is formed. The first bank portion 101 is located slightly closer to the flange 13 side than the center of the bottom plate 10 in the longitudinal direction. The second bank portion 102 is located on the flange 13 side of the first bank portion 101 at intervals. The second bank portion 102 extends from a position facing the end of the first bank portion 101 on the flange 13 side to substantially the center of the bottom plate 10 in the lateral direction. The third bank portion 103 is located at a distance on the flange 12 side with respect to the first bank portion 101. The third bank portion 103 extends from the end portion of the second bank portion 102 on the flange 12 side in the direction in which the flange 14 is located along the longitudinal direction of the bottom plate 10. The end 103A on the flange 14 side of the third bank 103 is located closer to the flange 13 than the drain hole 15 in the longitudinal direction of the bottom plate 10.

The fourth bank portion 104 is located on the flange 12 side with respect to the third bank portion 103. The fourth bank portion 104 has a wall portion 104A extending in parallel with the third bank portion 103, and a wall portion 104B intersecting the wall portion 104A and extending in the lateral direction of the bottom plate 10. The drainage hole 15 is located on the extension of the wall portion 104B on the flange 12 side. The fifth bank portion 105 is located on the flange 12 side with respect to the first bank portion 101. The fifth bank portion 105 has a protrusion 105A protruding toward the flange 13 along the first bank portion 101. The protrusion 105A is located slightly closer to the flange 11 than the end 103A of the third bank 103. The protrusion 105A is located between the first bank portion 101 and the third bank portion 103 in the lateral direction of the bottom plate 10. The protrusion 105A is located at substantially the same position as the drain hole 15 in the longitudinal direction of the bottom plate 10. Further, the fifth bank portion 105 has a wall portion 105B extending from the base portion of the protrusion portion 105A in the lateral direction of the bottom plate 10.

The third bank portion 103, the fourth bank portion 104, and the fifth bank portion 105 face each other. The protrusion 105A of the fifth bank 105 and the end 103A of the third bank 103 face each other in a state of being offset in the lateral direction of the bottom plate 10, and the wall 104B of the fourth bank 104 and the fifth bank 105 face each other. The wall portions 105B of the above face each other.

FIG. 8 is an enlarged view showing a portion indicated by reference numeral C in FIG. The end of the inclined groove 94 of the bell mouth 90 on the flange 12 side, that is, the end of the suction port 90A of the inclined groove 94 faces the valley formed between the first bank portion 101 and the second bank portion 102. I'm out.

The drainage channel of the present embodiment will be described with reference to FIGS. 6, 7, and 8. The bottom plate 10 is formed with a drainage channel 110 from a position of the flange 11 facing the rear end of the outdoor unit 1 of the inclined groove 94 to the drainage hole 15. The drainage channel 110 has a horizontal path 110A extending in the longitudinal direction of the bottom plate 10, a vertical path 110B extending in the lateral direction of the bottom plate 10, and a connecting path 110C connecting the horizontal path 110A and the vertical path 110B. The lateral path 110A includes a wall portion 101A on the flange 12 side of the first bank portion 101, a wall portion 102A on the flange 14 side of the second bank portion 102, and a wall portion 103B on the flange 11 side of the third bank portion 103. It is formed. The vertical path 110B is formed by a wall portion 104B on the flange 14 side of the fourth bank portion 104 and a wall portion 105B on the flange 13 side of the fifth bank portion 105. The connection path 110C is formed by an end 103A of the third bank 103, a wall 104A on the flange 11 side of the fourth bank 104, and a protrusion 105A of the fifth bank 105.

9 is a cross-sectional view taken along the line DD of FIG. 7. FIG. The vertical path 110B is inclined downward from the connection portion with the connection path 110C toward the drain hole 15. That is, the vertical path 110B is inclined downward from the front surface of the outdoor unit 1 toward the back surface.

As described above, in the present embodiment, the drainage channel 110 is formed in the bottom plate 10 by the above-mentioned plurality of embankments. Then, at least a part of the drainage channel 110 is inclined downward toward the drainage hole 15.

The operation of this embodiment will be described. When the water flows to the front panel 20, the water flows downward along the edge of the bell mouth 90 shown in FIG. 2 and concentrates on the lowermost end 90C. Moisture concentrated on the lowermost end portion 90C flows toward the suction port 90A along the inclined groove 94 as shown by an arrow in FIG. 4, and the first bank portions 101 and the second of the bottom plate 10 shown in FIGS. 5 and 8 It is guided to and from the bank portion 102. Moisture guided between the first bank portion 101 and the second bank portion 102 flows through the lateral path 110A of the drainage channel 110 and then through the connecting path 110C, as shown by the arrows in FIGS. 6 and 8. Reach the vertical path 110B. Since the vertical path 110B is inclined as shown in FIG. 9, the water reaching the vertical path 110B flows as shown by an arrow in FIG. 9 and is guided to the drain hole 15. The water guided to the drain hole 15 is discharged to the outside of the outdoor unit 1 through the drain hole 15.

According to the present embodiment, even if water flows into the bell mouth 90, the water flows along the inclined groove 94 and does not accumulate in the lowermost end portion 90C. Therefore, even when the outdoor unit 1 is used in a cold region, ice does not grow in the lower part of the bell mouth 90. As a result, the generation of abnormal noise and damage to the fan 71 due to contact between the fan 71 and ice during rotation of the fan 71 are prevented, and the reliability of the outdoor unit 1 is improved.

According to the present embodiment, the water guided by the inclined groove 94 is discharged to the outside of the outdoor unit 1 through the drainage channel 110 and the drainage hole 15. Therefore, water does not accumulate in the lower part of the bell mouth 90 and the bottom plate 10. Therefore, it is possible to prevent adverse effects on the contents of the bottom plate 10 and the outdoor unit 1, and the reliability of the outdoor unit 1 is improved.

Further, in the present embodiment, the inclined groove 94 is inclined downward from the lowermost end portion of the bell mouth 90 toward the back surface side of the outdoor unit 1. In other words, the inclined groove 94 is inclined toward the inside of the outdoor unit 1. Therefore, the water can be concentrated in the drain hole 15 of the bottom plate 10 of the outdoor unit 1, and the water does not carelessly scatter around the outdoor unit 1. Therefore, the moisture discharged from the outdoor unit 1 does not pollute the surroundings of the outdoor unit 1.

1 outdoor unit, 10 bottom plate, 11 flange, 12 flange, 13 flange, 14 flange, 15 drain hole, 20 front panel, 20A front part, 20B left side surface part, 21 opening, 30 side panel, 40 top plate panel, 50 heat Exchanger, 60 divider, 70 blower chamber, 71 fan, 72 fan guard, 80 machine chamber, 81 compressor, 82 electrical equipment box, 90 bell mouth, 90A suction port, 90B outlet, 90C bottom end, 91 upstream Curved part, 92 Downstream curved part, 93 Connection part, 94 Inclined groove, 101 1st bank part, 101A edge part, 102 2nd bank part, 102A edge part, 103 3rd bank part, 103A end part, 103B edge part, 104 4th bank, 104A edge, 104B edge, 105 5th bank, 105A protrusion, 105B edge, 110 drainage channel, 110A horizontal path, 110B vertical path, 110C connection path.

Claims (2)

An outdoor unit of an air conditioner including a bottom plate, a heat exchanger, a fan for supplying air to the heat exchanger, and an annular bell mouth, wherein the heat exchanger is the outdoor unit of the outdoor unit on the bottom plate. The bell mouth is located on the back side, the bell mouth is provided in the opening of the front panel arranged on the front side of the outdoor unit in the bottom plate, the fan is located in front of the heat exchanger, and the bell is located. The suction port into which the air guided by the fan flows in the mouse is located on the back side of the outdoor unit, and the air outlet from which the air flows out in the bell mouth is located on the front side of the outdoor unit.
An inclined groove that inclines downward only toward the rear side of the outdoor unit is formed at the lower end of the bell mouth.
In the bottom plate, a drainage hole is formed at the rear end of the outdoor unit, and a drainage channel for guiding water to the drainage hole is formed.
An outdoor unit of an air conditioner whose end on the back side of the inclined groove faces the drainage channel. The bell mouth has an upstream curved portion located on the suction port side, a downstream curved portion located on the outlet side, and a connecting portion connecting the upstream curved portion and the downstream curved portion.
The outdoor unit of the air conditioner according to claim 1, wherein the inclined groove is formed over the connection portion and the upstream curved portion.

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