JP6092637B2 - Air conditioner drainage structure - Google Patents

Description

  The present invention relates to a drainage structure of an air conditioner having a drain pan at the front and rear.

  Conventionally, as a drainage structure in an indoor unit of this type of air conditioner, Patent Document 1 discloses that a cabinet with a rear case and a front case includes a front side heat exchanger and a rear side heat exchanger with a reverse side view V. An indoor heat exchanger formed in a letter shape is disposed, and a cross flow fan is disposed in an inverted V-shaped space of the indoor heat exchanger to receive drain water generated in the front heat exchanger. A front drain pan is disposed below the front heat exchanger, and a rear drain pan that receives drain water generated in the rear heat exchanger is disposed below the rear heat exchanger in a state of being integrally formed with the rear case. A drainage structure is disclosed in which a water conduit that guides drain water from the back side drain pan to the front side drain pan is formed.

JP 2002-98347 A

  By the way, in this type of drainage structure, the water conduit is adjacent to the air passage from the inlet to the outlet in the cabinet, and there is a gap at the joint between the water conduit provided on the back side drain pan and the front drain pan. And communicated with the air flow path. When the fan in the air passage is driven, negative pressure is generated in the air passage, and drain water dripping from the leading end of the water guide passage to the front drain pan is sucked from the gap to the air passage side. There is a possibility that drain water enters the air passage and is discharged into the room through the outlet.

  In particular, when the amount of drain water generated on the back side is large, the drain water falling from the water conduit does not go downward, but is likely to be sucked into the air passage and blown out from the outlet.

  In order to prevent drain water from entering the air passage, it is necessary to newly insert a sealing material so as to close the gap, which may increase the number of parts.

  Further, in order to reduce the influence of the fan in the air passage, it is possible to configure the water conduit so as to be away from the fan. When the water guide path is designed to be separated from the air passage in this way, an extra space is required, and the indoor unit becomes larger or the air passage becomes narrower, which may reduce the blowing performance.

  In view of the above, an object of the present invention is to provide a drainage structure of an air conditioner that can suppress the influence of wind by a fan in an air passage and can prevent drain water from entering the air passage.

  In the air conditioner according to the present invention, the front heat exchanger and the rear heat exchanger are disposed in the air passage in the cabinet, the fan is disposed in the space surrounded by both heat exchangers, and the front heat exchange A front drain pan that receives drain water generated in the condenser is disposed below the front heat exchanger, and a rear drain pan that receives drain water generated in the rear heat exchanger is disposed below the rear heat exchanger, A water conduit that guides the drain water of the drain pan to the front drain pan is provided on the side of the air passage, and a dripping portion at the front end of the water conduit is located above the front drain pan. A plurality of extension walls are formed around the dripping portion so as to block the wind in the flow direction of the wind generated in the vicinity of the dripping portion when the air passage becomes negative pressure.

  When the plurality of extension walls surround the dripping part, the wind flowing around the dripping part is blocked, and the drain water dripping from the dripping part can be prevented from flowing by the wind.

  There may be a gap between the side wall of the air passage and the front drain pan, and each extension wall may be provided between the gap and the dropping portion. By driving the fan, wind toward the gap is generated around the dropping portion. However, since the extension wall is between the gap and the dripping portion, the flow of wind toward the gap changes, and the drain water is less likely to be drawn into the gap.

  The plurality of extension walls may be positioned on at least the air passage side and the rear side of the dropping portion, respectively. As an extension wall on the air passage side of the dripping part, a front extension wall is formed by extending the side wall on the air passage side of the conduit to the front, and as an extension wall on the rear side of the dropping part, from the front end of the conduit A rear extension wall may be formed extending toward. The drain water falls from the dropping portion along each extension wall, and the drain water that falls can be kept away from the gap. Thereby, drain water becomes difficult to receive the influence of a wind.

  You may make it form the at least 1 downward extension wall extended toward the downward direction in the side wall by the side of the air passage of a water conduit. Even if the drain water wraps around each extension wall, the lower extension wall can prevent the drain water from moving toward the air passage.

  According to the present invention, it is possible to prevent drain water from flowing into the air passage and entering the air passage by the plurality of extension walls formed around the dropping portion blocking the wind.

The perspective view of the indoor unit of the air conditioner of this invention Front view of indoor unit AA sectional view of FIG. Front view of back plate with drain pan unit attached Perspective view of back plate with drain pan unit attached Sectional view of the back plate with the drain pan unit attached Front view of back plate and enlarged view of dripping part of waterway Perspective view of back plate and enlarged perspective view of dripping portion of water conduit The figure which shows the flow of the wind around the dripping part provided with the extension wall

  The air conditioner according to the present invention is a separate type and includes an indoor unit and an outdoor unit. The indoor unit includes an indoor heat exchanger and a fan, and the outdoor unit includes a compressor, a four-way valve, an outdoor heat exchanger, and a throttle device. The indoor unit and the outdoor unit are connected by a refrigerant pipe to form a refrigeration cycle, and various operation modes such as cooling, heating, and dehumidification are executed.

  As shown in FIGS. 1 to 4, the indoor unit has a suction port 2 for sucking room air in the top surface of the cabinet 1, and a blower outlet 3 in the opening at the lower front of the cabinet 1. An air passage 4 extending from the suction port 2 to the air outlet 3 is formed inside the cabinet 1, and a heat exchanger 5 and a fan 6 are disposed in the air passage 4. When the cabinet 1 is viewed from the front, the width direction is the left-right direction, the depth direction of the cabinet 1 is the front-rear direction, and the height direction of the cabinet 1 is the vertical direction.

  As shown in FIG. 1, the cabinet 1 includes a back plate 7 and a front panel 8, and the front panel 8 is detachably attached to the back plate 7. The back plate 7 is formed in a box shape with an open front, and the back side is a flat surface that can be attached to a wall surface in the room. Further, a curved rear guide wall 9 is formed on the front side of the back plate 7, and this wall 9 becomes the lower wall of the air passage 4. A suction port grill 10 is formed on the top surface of the back plate 7 and constitutes a rear portion of the suction port 2.

  The front panel 8 is formed in a box shape with the back side open, and the front cover 11 is disposed so as to be openable and closable so as to cover the opening on the front surface. A filter cleaning unit 13 for cleaning the filter 12 is provided in the cabinet 1, and the filter 12 can be attached and detached by opening the front cover 11.

  A suction grill 14 is formed on the top surface of the front panel 8. The suction port 2 is formed by the suction port grill 14 and the suction port grill 10 of the back plate 7. The filter 12 is disposed on the back side of the inlet grilles 10 and 14, and the heat exchanger 5 is disposed on the downstream side of the filter 12 in the air passage 4. The heat exchanger 5 includes a front heat exchanger 5a located on the front panel 8 side and a back side heat exchanger (rear side heat exchanger) 5b located on the back plate 7 side. 5b is arranged in an inverted V shape in a side view. In the air passage 4, the fan 6 is disposed on the downstream side of the heat exchanger 5 and surrounded by the heat exchanger 5.

  As shown to FIGS. 3-6, the drain pan unit 20 which has the drain pan and the blower outlet 3 is provided in the cabinet 1 so that attachment or detachment is possible. The drain pan unit 20 is attached to the front side of the back plate 7 and is fitted into the opening at the lower front of the front panel 8. The drain pan unit 20 is formed in a cylindrical shape, the central hollow portion serves as the air outlet 3, and the air outlet 3 communicates with the air passage 4. A rotatable horizontal louver 21 is provided in front of the air outlet 3, and a plurality of vertical louvers 22 that can swing in the left-right direction are provided behind the horizontal louver 21. As the lateral louver 21 rotates, the air outlet 3 is opened and closed.

  The lower wall of the air outlet 3 communicates with the rear guide wall 9 of the back plate 7 and becomes a part of the lower wall of the air passage 4. The rear side of the upper wall of the air outlet 3 faces the fan 6 and becomes the upper wall of the air passage 4. A pair of left and right side walls 23, 24 are formed on the back plate 7 so as to protrude forward, and a pair of left and right side walls are also formed on the front panel 8, and the side walls 23 .24 of the back plate 7 are formed. And the side wall of the front panel 8 are combined to form the left and right side walls of the upstream portion of the air passage 4. Further, the left and right side walls of the air outlet 3 are connected to the side walls 23 and 24 of the back plate 7 and the side walls of the front panel 8, and become the side walls of the downstream portion of the air passage 4.

  The fan 6 is a cross flow fan, and is provided with rotating shafts on the left and right sides. The left and right rotating shafts of the fan 6 are rotatably supported on the left and right side walls of the upstream portion of the air passage 4 via bearings 25 and 26, respectively. A fan motor 27 is connected to the shaft end of the one rotation shaft. An electrical box is installed on one side of the air passage 4 in the left-right direction.

  The front side of the drain pan unit 20 is located below the front heat exchanger 5a, and a front drain pan 30 is formed on the upper surface of the front side of the drain pan unit 20. The front drain pan 30 is formed in a dish shape that is long in the left-right direction. A heat insulating material 31 is attached to the inner surface of the front drain pan 30. The width of the front drain pan 30 in the left-right direction is larger than the width of the air passage 4 in the left-right direction, and the left and right ends of the front drain pan 30 are located outside the left and right side walls of the air passage 4.

  The rear side of the front drain pan 30 is slightly recessed and lowered, and drainage ports 32 for discharging drain water are formed at both left and right ends, respectively. A drain hose is connected to either the left or right drain port 32, and drain water is discharged to the outside of the cabinet 1 through the drain hose.

  Further, as shown in FIG. 3, a rear drain pan 33 is provided below the back side heat exchanger 5b. The rear drain pan 33 is formed integrally with the back plate 7 and is formed in a dish shape that is long in the left-right direction, like the front drain pan 30. The rear drain pan 33 is located higher than the front drain pan 30.

  As shown in FIGS. 6 to 8, a water conduit 34 that guides the drain water of the rear drain pan 33 to the front drain pan 30 is provided. The water conduit 34 is located on the other side of the air passage 4 and is formed integrally with the back plate 7. The water conduit 34 is formed along the other side wall of the air passage 4 and is formed in a bowl shape by a pair of left and right side walls 35a and 35b. The other side wall 35a located on the outer side is formed vertically, and the one side wall 35b located on the air passage side is formed to be inclined. The lower end of the one side wall 35b is connected to the lower end of the other side wall 35a. One side wall 35 b is formed integrally with the side wall 23 of the air passage 4 formed in the back plate 7. In addition, the eaves shape of the water conduit 34 is not limited to the square shape as described above, but may be a U shape, a V shape, a J shape, or the like.

  The water conduit 34 is lowered from the rear side toward the front side, and the front end of the water conduit 34 is located above the other side of the front drain pan 30. The front end of the water conduit 34 is a dropping unit 36, and the dropping unit 36 is located above the front drain pan 30, and the drain water flowing from the rear drain pan 33 falls from the dropping unit 36 to the front drain pan 30. A portion outside the side wall of the air passage 4 on the rear side of the front drain pan 30 is a joining portion 37 that receives drain water from the rear drain pan 33, and the joining portion 37 is located immediately below the dropping portion 36.

  By the way, the side wall on the other side of the air passage 4 can be divided in order to attach and detach the fan 6. The side walls of the back plate 7, the front panel 8, and the drain pan unit 20 come into contact with each other to form one side wall. Therefore, when the drain pan unit 20 is attached to the back plate 7, the side wall 38 of the outlet 3 of the drain pan unit 20 and the side wall 23 of the back plate 7 face each other as shown in FIG. A gap 39 is formed between the upper edge and the lower edge of the side wall 23 of the back plate 7 in the front-rear direction. The gap 39 faces the air passage 4 where the fan 6 is located, and the air passage 4 and the front drain pan 30 communicate with each other through the gap 39. Therefore, when the fan 6 is driven, the air passage 4 becomes negative pressure. Air in the front drain pan 30 is sucked into the air passage 4 from the gap 39, and wind toward the gap 39 is generated in the vicinity of the dripping portion 36 of the water conduit 34. Due to this wind, water drops that have dropped from the dropping section 36 are sucked into the gap and enter the air passage 4. In order to prevent this, a plurality of extension walls that block the wind are provided around the dropping portion 36.

  In the vicinity of the dripping portion 36, a left-right wind that goes directly to the gap 39 on the side and a front-rear wind that goes backward are generated. Note that the space in front of the dropping portion 36 communicates with the air passage 4 through the front drain pan 30, and the air from the air passage 4 flows. Therefore, the wind which goes to the air path 4 does not arise, and a water droplet does not go ahead.

  As extension walls of the first embodiment, a front extension wall 40 located in front of the dropping part 36, a rear extension wall 41 located behind the dropping part 36, two lower extension walls 42 located below the dropping part 36, 43 is provided, and each of the extension walls 40, 41, 42, 43 is located between the gap 39 and the dropping part 36.

  The front extension wall 40 is formed by extending a side wall 35b on one side of the water conduit 34 forward, and projects forward from the side wall 35a on the other side of the water conduit 34. The lower end of the front extension wall 40 formed to be inclined is located below the dropping portion 36 and outside the other side wall 35a. The front extension wall 40 is located on the side of the dripping portion 36 on the side of the air passage, and blocks wind from the dripping portion 36 toward the side.

  The rear extension wall 41 is located at the front end of the other side wall 35a, is formed to protrude outward in the left-right direction from the side wall 35a, and is formed long in the up-down direction. The upper end of the rear extension wall 41 is at a position higher than the lower end of the dropping part 36, and the lower end of the rear extension wall 41 is at a position lower than the lower end of the dropping part 36. The front extension wall 40 is located on the front side of the rear extension wall 41, and the extension walls 40, 41 are integrally formed. The rear extension wall 41 blocks the wind that flows backward from the dripping portion 36.

  The lower extension walls 42 and 43 are formed along the front-rear direction and are formed integrally with the front extension wall 40. The first lower extension wall 42 is located away from the air passage 4, is formed to extend downward from the lower end of the front extension wall 40, and forward from the side end of the rear extension wall 41 on the air passage side. Is formed to extend. The lower end of the first downward extending wall 42 is formed to be inclined downward from the front side to the rear side.

  The second lower extension wall 43 is formed so as to protrude downward from the back surface of the front extension wall 40, and is formed long in the front-rear direction along the gap 39. The second downward extension wall 43 is located near the side wall of the air passage 4 and is close to the gap 39. The lower end of the second downward extending wall 43 is formed to be inclined downward toward the outer side in the left-right direction.

  Each downward extension wall 42 and 43 blocks the wind which goes to the air passage side. In particular, the first lower extension wall 42 wraps around the lower end of the front extension wall 40 and blocks the wind toward the gap. The second downward extending wall 43 blocks the wind flowing into the gap 39.

  In the above configuration, when the fan 6 is driven by the operation of the air conditioner, the air passage 4 around the fan 6 becomes negative pressure. At this time, air outside the air passage 4 is sucked into the air passage 4 from the gap 39. As a result, a wind toward the gap 39 is generated around the dripping portion 36 near the gap 39.

  The drain water accumulated in the rear drain pan 33 passes through the water conduit 34 and reaches the dripping portion 36. The drain water falling from the dropping part 36 drops along the extended walls 40, 41, 42. The drain water is collected in the front drain pan 30 without being affected by the wind.

  Specifically, the drain water flowing out from the dropping part 36 flows downward through the front extension wall 40 and the rear extension wall 41, and further flows downward through the first lower extension wall 42 and the rear extension wall 41. . The drain water falls from the lower end of the first lower extension wall 42 and the lower end of the rear extension wall 41. In addition, since the lower end of the first lower extension wall 42 is inclined toward the rear extension wall 41, the drain water flowing along the first lower extension wall 42 flows toward the rear extension wall 41, Drain water is collected. By these extension walls 40, 41, 42, the drain water is dripped after being guided to a position away from the dripping portion 36. That is, the drain water is guided to a position below the gap 39 and far from the gap 39.

  On the other hand, as shown in FIG. 9, the wind that flows toward the gap 39 on the side of the dripping portion 36 is blocked by the first downward extending wall 42 as the flow of wind around the dripping portion 36. It flows around the lower extension wall 42 and flows upward along the back surface of the front extension wall 40. However, the wind flowing along the front extension wall 40 is blocked by the second lower extension wall 43 and does not flow directly into the gap 39. Further, the wind toward the rear of the dropping part 36 flows around the rear extension wall 41 and flows obliquely upward. Thus, by providing the plurality of extension walls 40, 41, 42 around the dropping portion 36, the flow of wind changes compared to the case where the extension walls 40, 41, 42 are not provided. Around the dropping part 36, the wind toward the gap 39 is blocked, and the wind directly from the dropping part 36 toward the gap 39 disappears. That is, the suction force due to the negative pressure in the air passage 4 can be weakened by increasing the distance from the dropping part 36 to the gap 39.

  Therefore, the drain water flowing out from the dripping portion 36 of the water conduit 34 flows down on the surfaces of the extension walls 40, 41, 42 without being affected by the wind. And drain water leaves | separates from each extension wall 40,41,42. At the lower end of each extension wall 41, 42, the drain water is affected by the wind, but since the first lower extension wall 42 and the rear extension wall 41 are vertical, the drain water passes through the extension walls 40, 41, 42. It does not wrap around the back side.

  The drain water that has reached the lower end of the first lower extension wall 42 flows toward the rear extension wall 41 along the inclined lower end, and merges with the drain water that has flowed down the rear extension wall 41 to form large water droplets. Fall. Although the water droplets are caused to flow by the wind, the wind near the lower ends of the extension walls 41 and 42 is the wind directed upward and away from the gap 39, so the wind force is also weak. For this reason, the water drops are not carried to the gap 39 but fall to the front drain pan 30 by their own weight.

  In this way, the wind toward the gap 39 is blocked by the plurality of extension walls 40 to 43 provided around the dripping portion 36, and the drain water dripping from the water conduit 34 is surrounded by the extension walls 40 to 43. The inside falls to the front drain pan 30 without being blown by the wind. Therefore, it is possible to reliably prevent the drain water from being blown by the wind and entering the air passage 4 from the gap 39.

  As described above, in the air conditioner of the present invention, the front heat exchanger 5a and the rear heat exchanger 5b are disposed in the air passage 4 in the cabinet 1, and the space surrounded by both the heat exchangers 5a and 5b. The rear drain pan 30 is disposed below the front heat exchanger 5a and receives the drain water generated in the rear heat exchanger 5b. The front drain pan 30 receives the drain water generated in the front heat exchanger 5a. A drain pan 33 is disposed below the rear heat exchanger 5 b, a water conduit 34 that guides the drain water of the rear drain pan 33 to the front drain pan 30 is provided on the side of the air passage 4, and a dripping portion at the front end of the water conduit 34 A plurality of extension walls 40 to 43 are disposed at the dripping portion so that the air is blocked in the direction of the wind generated near the dripping portion 36 when 36 is positioned above the front drain pan 30 and the air passage 4 becomes negative pressure. 36 is formed around the periphery.

  When the plurality of extension walls 40 to 43 surround the periphery of the dropping part 36, the flow of wind around the dropping part 36 changes. The wind flowing from the dripping portion 36 toward the air passage 4 is blocked, and the drain water dripping from the dripping portion 36 is not flowed by the wind.

  There is a gap 39 between the side wall of the air passage 4 and the front drain pan 30, and the extension walls 40 to 43 are provided between the gap 39 and the dropping part 36. By driving the fan 6, wind toward the gap 39 is generated around the dropping portion 36. However, the flow of wind toward the gap 39 is changed by the extension walls 40 to 43. The wind does not go directly from the dripping portion 36 to the gap 39, and the influence of the wind on the drain water can be reduced, and the drain water is hardly attracted to the gap 39.

  The plurality of extension walls 40 to 43 are located at least on the air passage side and the rear side of the dropping portion 36, respectively. The water conduit 34 is formed toward the front side of the cabinet 1, and the dripping portion 36 is at the front end of the water conduit 34. Therefore, around the dripping portion 36, a wind that goes directly to the side gap 39 and a wind that reaches the gap 39 rearward are generated. In order to block these winds, the extension walls 40 to 43 may be provided on the air passage side and the rear side of the dropping portion 36.

  As the extension wall 40 on the air passage side of the dripping part 36, the front extension wall 40 is formed by extending the side wall 35 b on the air passage side of the water conduit 34 forward, and as the extension wall 41 on the rear side of the dropping part 36. A rear extension wall 41 extending downward from the front end of the water conduit 34 is formed.

  The front extension wall 40 blocks the wind toward the side gap 39. The rear extension wall 41 obstructs the wind toward the rear. Then, the drain water flows from the dropping portion 36 along the extension walls 40 and 41 and falls from the lower ends of the extension walls 40 and 41. Since the lower ends of the extension walls 40 and 41 are located away from the dripping portion 36, the position where the drain water is separated from the extension walls 40 and 41 is far from the gap 39. The falling drain water can be kept away from the gap 39. The extension walls 40 and 41 change the flow of the wind from upward to the gap 39. Therefore, the drain water is not easily affected by the wind, and the drain water falls by its own weight.

  At least one downward extending wall extending downward is formed on the side wall 35b of the water conduit 34 on the air passage side. Even if the drain water is swept by the wind and wraps around each extension wall, the drain water is blocked by the lower extension wall, and the drain water does not go to the air passage side.

  The lower extension wall 42 is formed at the lower end of the front extension wall 40. The drain water flows down from the front extension wall 40 along the lower extension wall 42. It is possible to prevent the drain water from entering the back surface of the front extension wall 40. Further, the lower extension wall 43 is formed on the back surface on the air passage side from the lower end of the front extension wall 40. Even if the drain water goes around to the back side of the front extension wall 40, the drain water is blocked by the lower extension wall 43 near the air passage 4.

  In addition, this invention is not limited to the said embodiment, Of course, many corrections and changes can be added within the scope of the present invention. As an extension wall of the second embodiment, the rear extension wall 41 may be inclined forward and downward. Other extension walls are the same as those of the first embodiment. By combining the rear extension wall 41 and the front extension wall 40 inclined to each other, the drain water flowing out from the dripping portion 36 can be collected in one place. It becomes large water droplets and can be made less susceptible to wind.

  As the extension wall of the third embodiment, the front extension wall 40 and the rear extension wall 41 may be combined to form a series of walls. At this time, a space between the front extension wall 40 and the rear extension wall 41 is used as a curved surface, and a series of extension walls surrounding the rear from the side of the dripping portion 36 is formed. The lower extension walls 42 and 43 are provided in the same manner as in the above embodiment.

3 Outlet 4 Air Passage 5 Heat Exchanger 5a Front Heat Exchanger 5b Rear Heat Exchanger 6 Fan 7 Back Plate 8 Front Panel 20 Drain Pan Unit 23 Other Side Wall 30 Front Drain Pan 33 Rear Drain Pan 34 Water Conduit 35a Other Side Side wall 35b One side wall 36 Dropping portion 39 Clearance 40 Front extension wall 41 Rear extension wall 42 First lower extension wall 43 Second lower extension wall

Claims (3)

A front heat exchanger and a rear heat exchanger are disposed in the air passage in the cabinet, a fan is disposed in a space surrounded by both heat exchangers, and a front side that receives drain water generated by the front heat exchanger. A drain pan is disposed below the front heat exchanger, a rear drain pan that receives drain water generated in the rear heat exchanger is disposed below the rear heat exchanger, and the drain water of the rear drain pan is guided to the front drain pan. The water conduit is provided on the side of the air passage, the dripping portion at the front end of the water conduit is located above the front drain pan, there is a gap between the side wall of the air passage and the front drain pan, and the air passage becomes negative pressure. A plurality of extension walls are formed around the dropping part so that the wind is blocked in the direction of the wind generated in the vicinity of the dropping part, and among the plurality of extension walls, the lower extension wall extending downward is a gap. characterized in that formed along the Drainage structure of the air conditioner to be. As an extension wall located on the rear side of the dripping part, a rear extension wall extending in the vertical direction is formed at the front end of the side wall of the water conduit, and the upper end of the rear extension wall is higher than the lower end of the dripping part, and the rear extension The drainage structure for an air conditioner according to claim 1, wherein the lower end of the wall is located at a position lower than the lower end of the dropping portion. As an extension wall positioned on the air passage side of the dripping portion, a front extension wall is formed by extending a slanted side wall on the air passage side of the water conduit to the front, and an air passage on the back surface of the front extension wall The lower extension wall is formed at a position near the side wall of the first extension wall, and the first lower extension wall is formed so as to protrude downward from the lower end of the front extension wall located below the dropping portion. The drainage structure for an air conditioner according to claim 1 or 2.

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