WO2018198398A1 - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
WO2018198398A1
WO2018198398A1 PCT/JP2017/035926 JP2017035926W WO2018198398A1 WO 2018198398 A1 WO2018198398 A1 WO 2018198398A1 JP 2017035926 W JP2017035926 W JP 2017035926W WO 2018198398 A1 WO2018198398 A1 WO 2018198398A1
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WO
WIPO (PCT)
Prior art keywords
drain pan
heat exchanger
air conditioner
indoor heat
insulating material
Prior art date
Application number
PCT/JP2017/035926
Other languages
French (fr)
Japanese (ja)
Inventor
佑芽 赤津
能登谷　義明
吉田　和正
真和 粟野
正徳 秋元
幸範 田中
貴郎 上田
Original Assignee
日立ジョンソンコントロールズ空調株式会社
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Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=62706324&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2018198398(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 日立ジョンソンコントロールズ空調株式会社 filed Critical 日立ジョンソンコントロールズ空調株式会社
Priority to CN201780088134.5A priority Critical patent/CN110392808B/en
Publication of WO2018198398A1 publication Critical patent/WO2018198398A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents

Definitions

  • the present invention relates to an air conditioner.
  • the indoor unit that constitutes the air conditioner is provided with a drain pan that receives the condensed water generated in the indoor heat exchanger.
  • a technique related to the structure of the drain pan a technique described in Patent Document 1 is known.
  • Patent Document 1 in the drain pan and the foam heat insulating material for the drain pan disposed on the inner wall of the drain pan, the condensed water is prevented from flowing between the drain pan and the foam heat insulating material for the drain pan and being exposed to the outer wall of the drain pan.
  • the air conditioning is characterized by lowering the expansion ratio of the foam insulation for drain pans and reducing only the drain pan outlet for discharging condensed water and the foam insulation insulation outlet for drain pan for the purpose of reducing work man-hours. The machine is listed.
  • JP 2008-292100 A (refer to FIG. 2 in particular)
  • the present inventors cause the refrigerant having an evaporation temperature lower than the evaporation temperature of the refrigerant to be passed during the cooling operation and the dehumidifying operation to flow through the indoor heat exchanger, and deliberately generate condensed water in the indoor heat exchanger.
  • the “condensation water” here includes liquid water directly adhering to the indoor heat exchanger and liquid water generated by melting frost adhering to the indoor heat exchanger.
  • the term “condensed water” is synonymous.
  • the refrigerant having an evaporation temperature lower than the evaporation temperature of the refrigerant to be passed during the cooling operation and the dehumidifying operation flows through the indoor heat exchanger. Therefore, the amount of condensed water that is instantaneously generated is larger than the amount of condensed water that is generated during cooling operation and dehumidifying operation. Therefore, from the viewpoint of preventing the condensed water flowing down to the drain pan from overflowing from the drain pan, it is preferable that the condensed water flowing down to the drain pan is quickly discharged to the outside.
  • An object of the present invention is to provide an air conditioner including a preventable drain pan.
  • the gist of the present invention is that the cross-flow fan, the indoor heat exchanger, and the condensed water generated in the indoor heat exchanger disposed below the indoor heat exchanger are received on the surface, and the received condensed water is outdoors.
  • a drain outlet for draining water is formed, and a drain pan having concavities and convexities for guiding condensed water received on the surface to the drain outlet and the indoor heat exchanger are passed through during the cooling operation and the dehumidifying operation.
  • the present invention relates to an air conditioner having an indoor unit including a control unit that causes a refrigerant having an evaporation temperature lower than an evaporation temperature of the refrigerant to flow.
  • an air conditioner including a drain pan that can prevent the dew condensation from overflowing from the drain pan even when a large amount of dew condensation water is instantaneously generated.
  • FIG. 7 is an end view taken along line BB in FIG. 6.
  • FIG. 7 is a cross-sectional view taken along the line CC of FIG.
  • FIG. 1 is a cross-sectional view of an indoor unit 100 constituting an air conditioner 10 (see FIG. 2, not shown in FIG. 1) of the present embodiment.
  • the indoor unit 100 includes a cross-flow fan 4, an indoor heat exchanger 3 disposed so as to surround the cross-flow fan 4, and a drain pan 2 disposed below the indoor heat exchanger 3. These are accommodated in the housing 9.
  • the indoor heat exchanger 3 includes fins 3a and heat transfer tubes 3b.
  • the fins 3a are heated or cooled by allowing the refrigerant from the compressor 11 (see FIG. 2; not shown in FIG. 1) to flow through the heat transfer tubes 3b.
  • condensed water including liquid water generated by freezing and thawing as described above
  • the condensed water flows down to the drain pan 2 disposed below the indoor heat exchanger 3. The structure of the drain pan 2 will be described later with reference to FIG.
  • a discharge device 8 that discharges air is disposed at a position that does not block the flow of air during air-conditioning operation (specifically, above the front side).
  • the discharge device 8 When the discharge device 8 is discharged during air conditioning, the moisture in the air inside the housing 9 is charged with a negative charge, and the negatively charged water is released into the housing 9. The negatively charged moisture is released into the room by the rotational drive of the cross-flow fan 4 and the water retention of human skin existing in the room is enhanced.
  • an ultraviolet irradiation device for irradiating the inner surface of the drain pan 2 with ultraviolet rays is provided in the vicinity of the drain pan 2. While the air conditioning operation of the indoor unit 100 is stopped, the drain pan 2 is sterilized by irradiating the drain pan 2 with ultraviolet rays, and the occurrence of fungi and the like in the drain pan 2 is suppressed.
  • the front panel 7 is provided in front of the indoor unit 100.
  • the front panel 7 is pivotable to the front side with the lower end as the center.
  • the lower surface of the indoor unit 100 is provided with an up / down airflow direction plate 18 that can be rotated downward about the rear side end portion thereof.
  • the front panel 7 rotates and upper direction opens, and the air suction inlet which is not shown in figure is formed.
  • an air outlet (not shown) is formed.
  • an air suction port 6 a that is opened in advance is formed above the indoor unit 100.
  • the cross-flow fan 4 is rotationally driven, so that the inside of the housing 9 is passed from the air suction port 6a and the air suction port formed by the rotation of the front panel 7 through the filters 15a and 15b.
  • the indoor air is sucked into the room.
  • the sucked air is heat-exchanged by the indoor heat exchanger 3 arranged so as to surround the cross-flow fan 4 and then blown out into the room through an air outlet formed by the rotation of the vertical air direction plate 18.
  • the blowing position of an up-down direction is controlled by controlling the rotation angle of the up-down wind direction board 18.
  • one end of the left / right wind direction plate 17 can also be rotated, and by controlling the rotation angle of the left / right wind direction plate 17, the left / right direction direction plate 17 can be moved in the left / right direction (the direction from the front side to the back side in FIG. 1). The blowing position is controlled.
  • FIG. 2 is a diagram showing a refrigeration cycle provided in the air conditioner 10 of the present embodiment.
  • the air conditioner 10 includes an outdoor unit 101 in addition to the indoor unit 100 shown in FIG.
  • the indoor unit 100 and the outdoor unit 101 are connected by a refrigerant pipe 5 so that the refrigerant can circulate.
  • the indoor unit 100 includes the indoor heat exchanger 3 and the cross-flow fan 4 as described above, and also includes the indoor unit control unit 1 that controls the operation of the indoor unit 100. Although details will be described later with reference to FIG. 3, in the air conditioner 10 of the present embodiment, after the air conditioning operation by the indoor unit 100, the indoor heat exchanger 3 is controlled to generate dew condensation water. And the indoor heat exchanger 3 is wash
  • the indoor unit control unit 1 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), an I / F (interface), and the like. And the indoor unit control part 1 is embodied when the predetermined
  • CPU Central Processing Unit
  • RAM Random Access Memory
  • ROM Read Only Memory
  • I / F interface
  • the outdoor unit 101 includes a compressor 11, a four-way valve 12, an outdoor fan 13, an outdoor heat exchanger 14, an expansion valve 15, and an outdoor unit control unit 16.
  • the refrigerant is discharged from the compressor 11 in the direction of the arrow in FIG.
  • the operation mode of the indoor unit 100 is switched to any one of the heating operation, the cooling operation, and the dehumidifying operation.
  • the operation mode of the indoor unit 100 is the heating operation
  • the refrigerant flows through the solid line in the four-way valve 12 shown in FIG.
  • the operation mode of the indoor unit 100 is the cooling operation and the dehumidifying operation
  • the refrigerant flows through the broken line in the four-way valve 12 shown in FIG.
  • the opening degree of the expansion valve 15 provided in the outdoor unit 101 can be adjusted. Adjustment of the opening degree of the expansion valve 15 is performed by driving an actuator (not shown) based on an instruction signal from the outdoor unit control unit 16 that controls the outdoor unit 101.
  • the outdoor unit control unit 16 includes a CPU, a RAM, a ROM, an I / F, and the like (not shown).
  • the outdoor unit control unit 16 is realized by a predetermined control program stored in the ROM being executed by the CPU.
  • the overall control of the air conditioner 10 is performed in cooperation with the outdoor unit controller 16 and the indoor unit controller 1 described above.
  • the indoor heat exchanger 3 is controlled to generate condensed water. Specifically, by allowing a low-temperature (for example, 0 ° C. or lower) refrigerant to flow through the indoor heat exchanger 3, moisture near the indoor heat exchanger 3 is frozen on the surface of the indoor heat exchanger 3. In other words, frost is generated on the surface of the indoor heat exchanger by allowing the refrigerant having an evaporation temperature that generates frost on the surface of the indoor heat exchanger 3 to flow through the indoor heat exchanger 3.
  • a low-temperature for example, 0 ° C. or lower
  • FIG. 3 is a diagram showing a freeze cleaning flow performed in the air conditioner 10 of the present embodiment. This flow is performed in cooperation with the indoor unit control unit 1 and the outdoor unit control unit 16 unless otherwise specified.
  • the air conditioning operation is stopped by the user operating, for example, a remote controller (step S1).
  • standby is performed for a predetermined time (for example, several minutes).
  • the outdoor unit control unit 16 throttles the opening of the expansion valve 15 (see FIG. 2). Specifically, the opening degree of the expansion valve 15 is made smaller than the opening degree of the indoor unit 100 during the cooling operation and the dehumidifying operation.
  • the outdoor unit control part 16 makes the direction of the four way valve 12 the same direction as the direction at the time of the air_conditionaing
  • the degree of expansion by the expansion valve 15 increases, and therefore, the indoor heat exchanger 3 is supplied with a low-temperature (for example, 0 ° C. or lower) refrigerant. Thereby, the indoor heat exchanger 3 is cooled. As a result, the moisture contained in the air inside the housing 9 is frozen on the surface of the indoor heat exchanger 3 and becomes frost (step S2).
  • the temperature (evaporation temperature) of the refrigerant flowing through the indoor heat exchanger 3 is lower than the evaporation temperature of the refrigerant flowing during the cooling operation and the dehumidifying operation. Therefore, the amount of water that has become frost in the indoor heat exchanger 3 is larger than the amount of condensed water that is generated during the cooling operation and the dehumidifying operation.
  • the outdoor unit control unit 16 changes the direction of the four-way valve 12 to the direction during the heating operation after a predetermined time has elapsed (for example, several minutes), and converts the high-temperature refrigerant discharged from the compressor 11 into the indoor heat exchanger 3.
  • a predetermined time for example, several minutes
  • the indoor heat exchanger 3 is heated and the frost on the surface of the indoor heat exchanger 3 is thawed (step S3).
  • the condensed water generated by thawing flows down to the drain pan 2. Thereby, dust, oil droplets, etc. adhering to the indoor heat exchanger 3 are washed away to the drain pan 2, and the same effect as “cleaning” is obtained.
  • the amount of water that has become frost is larger than the amount of condensed water that is generated during cooling operation and dehumidifying operation. Therefore, the amount of water that instantaneously flows down to the drain pan 2 is larger than the amount of condensed water generated during the cooling operation and the dehumidifying operation. Condensed water that has flowed down to the drain pan 2 is quickly discharged outside the drain 42 (see FIG. 4 and the like, not shown in FIG. 3), as will be described in detail later.
  • the outdoor unit control unit 16 starts driving the cross-flow fan 4. Thereby, air circulates inside the housing 9 and as a result of the air coming into contact with the indoor heat exchanger 3, the indoor heat exchanger 3 is dried (step S4).
  • FIG. 4 is a perspective view showing a state of the drain pan 2 provided in the indoor unit 100 constituting the air conditioner 10 of the present embodiment.
  • the drain pan 2 is disposed below the indoor heat exchanger 3 as described above.
  • the drain pan 2 is made of, for example, a resin such as acrylonitrile-butadiene-styrene copolymer resin (ABS resin) or polystyrene.
  • ABS resin acrylonitrile-butadiene-styrene copolymer resin
  • the resin which comprises the drain pan 2 contains antibacterial agents, such as an imidazole series, for example.
  • the drain pan 2 is molded, for example, by filling a resin material in a mirror-finished mold and solidifying it.
  • the drain pan 2 includes a front drain pan 35 (see FIG. 5, not shown in FIG. 4, left-right flow path) extending in the left-right direction when the indoor unit 100 is viewed from the front. And on the inner surface of the front drain pan 35, the flat heat insulating material 31 (left-right direction flow path) is arrange
  • the heat insulating material 31 is formed in a container shape by extending upward at the respective end portions on the front side and the back side.
  • the heat insulating material 31 is fixed to the inner surface of the front drain pan 35 by being fitted after applying an adhesive to a recess (not shown) formed on the inner surface of the front drain pan 35 (see FIG. 5). At this time, generation of a gap between the inner surface of the recess and the heat insulating material 31 is suppressed by using the heat insulating material 31 having elasticity and slightly larger than the hollow as the heat insulating material 31. .
  • the heat insulating material 31 contains antibacterial agents, such as an imidazole series, for example.
  • the front-rear direction flow path 40 extending from the front to the back as a part of the drain pan 2 is provided at each of the left and right ends of the front drain pan 35 (see FIG. 5) (that is, the left and right ends of the heat insulating material 31). Connected. Although details will be described later, a drain port 42 for draining the dew condensation water received by the drain pan 2 to the outside is formed on the back side of the front-rear direction flow path 40 disposed on each of the left and right sides.
  • convex portions 32 extending in the left-right direction, and concave portions 33 and 34 arranged on the front side and the back side of the convex portions 32 are formed on the surface of the heat insulating material 31 so as to guide the dew condensation water received on the surface to the front-rear direction flow path 40. It is a thing.
  • the convex portion 32 is continuously formed in the left-right direction, and the width (length in the front-rear direction) is uniform throughout the left-right direction. Further, the recesses 33 and 34 are also formed continuously in the left-right direction, and the width (front-back length) is also uniform in the entire left-right direction.
  • the convex portion 32 is formed to extend in the left-right direction at the center in the front-back direction (hereinafter referred to as the front-rear direction).
  • the height of the convex portion 32 is constant on the surface of the heat insulating material 31.
  • the surface of the heat insulating material 31 is not formed with an inclination downward toward the front-rear direction channel 40 described later, and the entire convex portion 32 is formed in the same plane.
  • the thickness of the heat insulating material 31 is also constant in the left-right direction.
  • the heat insulating material 31 is made of a material that does not absorb moisture, such as foamed polystyrene or foamed urethane, and its surface is water repellent. That is, in the heat insulating material 31, a water-repellent surface is disposed at a portion where condensed water flows. Thereby, when the dew condensation water flows down to the heat insulating material 31, the dew condensation water on the surface of the heat insulating material 31 becomes easy to evaporate, and the remainder after the dew condensation water hardly occurs. Moreover, since the heat insulating material 31 does not absorb moisture, generation
  • the heat insulating material 31 is molded, for example, by filling a resin material into a mirror-finished mold and foaming.
  • a drain port 42 connected to a drain pipe (not shown) for draining the condensed water that has flowed down to the drain pan 2 to the outside is formed on the back side of the front-rear channel 40.
  • the details will be described later with reference to FIG. 8, and a slope that is lowered toward the drain outlet 42 is formed on the bottom surface on the back side of the front-rear direction flow path 40. Thereby, the dew condensation water that has flowed down to the drain pan 2 is easily guided to the drain port 42.
  • a motor (not shown) for driving the left and right wind direction plates 17 is disposed on the back side of the front-rear direction flow path 40 on the front side. Therefore, the front side of the front-rear direction flow path 40 is raised, and a raised portion 41 is formed.
  • the height of the raised portion 41 is slightly lower than the height of the concave portion 33 formed in the heat insulating material 31. Therefore, the dew condensation water guided from the heat insulating material 31 to the front-rear direction flow path 40 is prevented from flowing back to the heat insulating material 31 side.
  • the condensed water that reaches the rising portion 41 from the heat insulating material 31 descends the rising portion 41 and is guided to the drain port 42.
  • a heat insulating material is not disposed on the inner surface of the front-rear direction flow path 40. Therefore, it is not necessary to prepare the heat insulating material 31 having a complicated shape in which the heat insulating material 31 and the heat insulating material arranged on the inner surface of the front-rear direction flow path 30 are integrated, and the manufacturing cost can be reduced. Illustrated
  • the drain pan 2 is molded using the mirror-finished mold as described above. Therefore, the surface of the drain pan 2 is almost smooth. Therefore, in the front-rear direction flow path 40, the portion where the condensed water flows is water repellent. As a result, the condensed water easily evaporates, and the remainder after the condensed water is unlikely to occur.
  • FIG. 5 is a cross-sectional view showing a relative positional relationship between the drain pan 2 and the indoor heat exchanger 3 in the indoor unit 100 constituting the air conditioner 10 of the present embodiment.
  • the fins 3 a constituting the indoor heat exchanger 3 and the heat insulating material 31 constituting the drain pan 2 are in contact with each other.
  • the fins 3 a are in contact with the recesses 34 of the heat insulating material 31, so that the back side inner surface of the heat insulating material 31 and the lower back side end of the indoor heat exchanger 3 are in contact.
  • the condensed water that has flowed down the fins 3 a easily moves to the heat insulating material 31. That is, if there is a gap between them, the condensed water will fall between the gaps, but the surface tension of the fin 3a is utilized because the fin 3a and the heat insulating material 31 are in contact with each other. Condensed water will flow down. As a result, the falling speed of the condensed water is increased, and the condensed water is quickly drained to the outside using the drain pan 2.
  • FIG. 6 is an enlarged view of part A in FIG.
  • thick arrows indicate the directions in which the condensed water that has flowed down into the recesses 33 and 34 flows.
  • the dew condensation water flowing through the concave portion 33 reaches the front-rear direction flow path 40 via the rising portion 41.
  • the dew condensation water flowing through the concave portion 34 directly reaches the front-rear direction flow path 40.
  • Condensed water flowing down to the drain pan 2 includes not only water generated during cooling operation and dehumidifying operation in the indoor unit 100, but also water generated by freezing as described above (see step S2 in FIG. 3).
  • the dew condensation water generated at the time of freezing is defrosted frost, so that it is at a lower temperature than the dew condensation water generated during the cooling operation and the dehumidification operation. Therefore, when the low-temperature dew condensation water flows down on the heat insulating material 31, the front drain pan 35 (see FIG. 5 and not shown in FIG. 6) is not easily cooled. As a result, the back surface of the front drain pan 35 (the side opposite to the side on which the heat insulating material 31 is disposed) is prevented from condensing.
  • both the front side end and the back side end of the heat insulating material 31 extend upward. Thereby, it is prevented that the dew condensation water which flowed down to the heat insulating material 31 from the indoor heat exchanger 3 (not shown in FIG. 4) arranged above the drain pan 2 leaks to the front side and the back side.
  • neither of the left and right ends of the heat insulating material 31 extends upward. Thereby, the dew condensation water that has flowed down to the heat insulating material 31 is guided along the convex portion 32 to the front-rear direction flow path 40 connected to the left and right ends thereof.
  • convex portions 32 extending in the left-right direction toward the front-rear direction flow path 40 are formed on the surface of the heat insulating material 31.
  • the present inventors examined it turned out that the dew condensation water which flowed down to the heat insulating material 31 flows easily along the wall surface which comprises the convex part 32 formed continuously. Therefore, the convex part 32 which can guide dew condensation water to the drain port 42 is formed, and dew condensation water can flow continuously without interruption on the way, The front-back direction flow path formed in both right and left ends 40 is easily guided. Thereby, the remainder after the dew condensation water on the surface of the heat insulating material 31 is suppressed.
  • the convex portion 32 is formed at the center in the front-rear direction of the heat insulating material 31, it is possible to prevent water droplets from being combined and growing excessively on the surface of the heat insulating material 31. Thereby, the water droplets of the condensed water are kept small on the surface of the heat insulating material 31, and the condensed water is easily moved (that is, drained).
  • the condensed water guided to the front-rear direction flow path 40 is guided to the drain port 42 by the convex part 43 and the concave part 44 formed on the surface thereof.
  • the surface shape of the front-rear channel 40 will be described with reference to FIG.
  • FIG. 7 is an end view taken along the line BB of FIG.
  • FIG. 7 is a diagram illustrating a state of an end face of the front-rear direction channel 40 when viewed from the flow direction of the dew condensation water in the front-rear direction channel 40.
  • a convex portion 43 formed at equal intervals and a concave portion 44 formed between adjacent convex portions 43, 43 are provided.
  • Four convex portions 43 are formed in the present embodiment.
  • the convex portion 43 and the concave portion 44 are formed integrally with the drain pan 2 by using a mold in which concave and convex portions are formed at positions and sizes corresponding to the convex portion 43 and the concave portion 44 when the drain pan 2 is molded.
  • the convex part 43 and the recessed part 44 are continuously formed in the front-back direction of the front-back direction flow path 40 in the shape shown in FIG. 7, respectively (refer also to FIG. 6). ).
  • the convex portion 43 has a substantially rectangular cross section in which two upper end portions are chamfered. Since the cross-sectional shape of the convex portion 43 is substantially rectangular, the contact area between the upper surface of the convex portion 43 and the condensed water increases. Thereby, coupled with the fact that the upper surface of the convex portion 43 is water-repellent, the growth of water droplets that straddle the convex portion 43 is suppressed. Therefore, the water droplets are kept small, and the water droplets of the dew condensation water are easily guided to the drain port 42 (see FIG. 6).
  • the convex portion 32 constituting the heat insulating material 31 the water droplets of the dew condensation water easily flow through the concave portion 44 along the convex portion 43 formed so as to be guided to the drain port 42. Therefore, as a result of the growth being suppressed by the convex portion 43, small water droplets are easily guided to the drain port 42 by the convex portion 43 and the concave portion 44.
  • the dew condensation water flowing into the front-rear direction channel 40 becomes easier to flow to the drain outlet 42, the dew condensation water disappears quickly from the front-rear direction channel 40. Therefore, as described above, low-temperature dew condensation water hardly remains in the front-rear direction flow path 40.
  • the front-rear channel 40 is prevented from being excessively cooled, and dew condensation on the back surface is prevented without providing a heat insulating material in the front-rear channel 40. Thereby, water is prevented from dripping into the ventilation path formed on the back surface side of the front-rear direction flow path 40 and facing the room where the indoor unit 100 is installed, and scattering of water into the room is prevented.
  • the width (length L1) of the convex portion 43 in the left-right direction is, for example, about 3 mm.
  • the center-to-center distance (length L2) between the protrusion 43 and the protrusion 43 adjacent to the protrusion 43 is, for example, about 4 mm.
  • the height (length L3) of the convex part 43 is about 0.3 mm, for example.
  • FIG. 8 is a cross-sectional view taken along the line CC of FIG.
  • FIG. 8 is a view showing a state in the vicinity of the drain port 42 when viewed from a direction perpendicular to the flow direction of the dew condensation water in the front-rear direction flow path 40 in a horizontal plane.
  • an inclination is formed that descends toward the drain port 42 formed on the back side. That is, the front-rear direction flow path 40 extends horizontally on the front side starting from the boundary 45, but a slope is formed downward toward the drain outlet 42 on the back side starting from the boundary 45.
  • the condensed water that has flowed along the convex portion 43 toward the back surface through the concave portion 44 is accelerated by the downward slope, and is easily drained through the drain port 42.
  • the dew condensation water that has flowed from the heat insulating material 31 to the front-rear channel 40 is retained in the front-rear channel 40 without being drained.
  • the air conditioner 10 of this embodiment since the inclination is formed in the vicinity of the drain port 42, the air conditioner 10 is preferentially collected in the vicinity of the drain port 42. Then, if this slope is moderated and the depth is made shallower, the amount of accumulated water is reduced in the vicinity. Therefore, even if condensed water accumulates, the accumulated condensed water tends to evaporate. As a result, even when the drain port 42 is blocked, the dew condensation water stays on the entire surface of the front-rear channel 40 and is prevented from condensing on the back surface of the front-rear channel 40.
  • the vicinity of the drain port 42 refers to the position where the boundary 45 is formed (distance L4 from the end of the drain port 42) and the degree of inclination (depth from the horizontal plane of the front-rear channel 40). It can be defined by the length L5). That is, since the amount of dew condensation water that is retained by L4 and L5 is determined, the amount that can be evaporated in, for example, several hours is determined in consideration of the area where the indoor unit 100 is installed, and is larger than that amount. L4 and L5 are determined so as to be volume. L4 is about 30 mm, for example, and L5 is about several mm, for example.
  • the height of the convex portion 43 formed in the front-rear direction channel 40 is described with reference to the boundary portion 46 that is the same position in the front-rear direction as the boundary portion 45 (see FIG. 7 above).
  • the length L3) gradually decreases in the direction of decreasing slope.
  • the change in the slope of the convex portion 43 (that is, the slope of the straight line in FIG. 7) is larger than the change in the slope of the concave portion 44 (that is, the slope of the straight line in FIG. 7). For this reason, the convex portion 43 disappears in the middle of the inclination formed in the front-rear direction flow path 40.
  • the convex portion 43 is not formed in the vicinity of the drain port 42 (see also FIG. 6). Thereby, the dew condensation water that has flowed through the concave portion 44 along the convex portion 43 is easily collected at the drain port 42. Therefore, it is suppressed that dew condensation water accumulates on the back side of the front-rear direction flow path 40, and is easily drained outside through the drain port 42.
  • the drain pan 2 having the above-described configuration is configured such that condensed water flows easily. Therefore, even if a large amount of dew condensation water instantaneously flows down from the indoor heat exchanger 3, it is quickly drained from the drain pan 2 to the outside through the drain port 42. As a result, it is possible to prevent the condensed water from overflowing from the drain pan 2.
  • the dew condensation water in the indoor heat exchanger 3 first flows down to the heat insulating material 31 extending in the left-right direction on the front side. If it does so, especially the low-temperature dew condensation water of washing
  • the heat insulating material 31 prevents the front drain pan 35 from being cooled by the low-temperature cooling water, and prevents condensation on the back side (ventilation path side) of the front drain pan 35. Thereby, scattering of water into the room is prevented.
  • the dew condensation water that has flowed over the heat insulating material 31 flows in the front-rear direction flow path 40. Therefore, the dew condensation water is warmed at room temperature while flowing through the heat insulating material 31, and as a result, the dew condensation water having a temperature higher than the temperature of the dew condensation water immediately after flowing down the heat insulating material 31 flows in the front-rear direction flow path 40. Therefore, dew condensation on the back side of the front-rear channel 40 can be prevented without arranging a heat insulating material in the front-rear channel 40.
  • the width (length in the front-rear direction) of the convex portion 32 and the concave portions 33 and 34 formed on the heat insulating material 31 is the same in the entire region in the left-right direction. It may gradually become wider (becomes longer) or may become gradually narrower (becomes shorter). For example, by making the widths of the recesses 33 and 34 gradually widen toward the front-rear direction flow path 40, the clogging of dust is reliably prevented at the left and right end portions of the heat insulating material 31 where dust tends to collect.
  • the widths of the recesses 33 and 34 can be gradually become wider toward the front-rear direction flow path 40, the flow rate of the condensed water can be increased at the left and right end portions of the heat insulating material 31.
  • the dew condensation water existing in 31 can flow into the front-rear direction flow path 40 more quickly.
  • the number and shape of the irregularities formed on the surface of the heat insulating material 31 are not limited to the example shown in the figure, and may be those formed so that the condensed water can be guided to the drain port 42. Any shape is acceptable. Specifically, for example, the protrusion 32 does not need to have a rectangular cross section (see FIG. 5), and may have a substantially rectangular cross section with chamfered corners. Moreover, it is good also as other shapes other than rectangular shape. Further, the number of the convex portions 32 formed on the heat insulating material 31, for example, does not need to be only one in the left-right direction (see FIG. 4) as illustrated, and may be two or more, for example. And what is necessary is just to form the recessed parts 33 and 34 corresponding to the number and shape of the convex part 32. FIG.
  • the number and shape of the irregularities formed in the front-rear direction flow path 40 are not limited to the example shown in the drawing, and any form may be used as long as it is formed so that condensed water can be guided to the drain port 42. It may be a simple shape. Specifically, for example, the convex portion 43 does not need to have a substantially rectangular shape (see FIG. 7) in which corner portions are chamfered, and may have a rectangular shape in which corner portions are not chamfered. Moreover, it is good also as other shapes other than rectangular shape. Furthermore, the number of the convex parts 43 does not need to be four in the front-rear direction as shown in the figure (see FIG. 7), and can be three or less, or five or more, for example. And what is necessary is just to form the recessed part 44 corresponding to the number and shape of the convex part 43. FIG.
  • the frost generated in the indoor heat exchanger 3 was thawed by heating the indoor heat exchanger 3.
  • the frost generated in the indoor heat exchanger 3 is thawed by passing a refrigerant (a refrigerant having an evaporating temperature that is not frozen) during cooling operation or dehumidifying operation, for example, instead of the refrigerant during heating operation. May be.
  • natural thawing may be performed without flowing the refrigerant.
  • the cross-flow fan 4 may be rotationally driven as necessary to promote thawing.
  • step S4 in order to promote the drying of the indoor heat exchanger 3, a member for directing the flow of air generated by the cross-flow fan 4 toward the indoor heat exchanger 3, ventilation A road or the like may be provided.
  • the heat insulating material 31 is disposed on the front drain pan 35.
  • the heat insulating material 31 is preferably disposed on the surface (inner surface), the heat insulating material 31 is not essential.
  • the convex portion 32 formed on the heat insulating material 31 is directly formed on the inner surface of the front drain pan 35.
  • the heat insulating material 31 may be disposed on the back surface (outer surface) of the front drain pan 35.
  • the heat insulating material is not disposed on the surface of the front-rear flow path 40
  • the above example is preferable, but for example, the heat insulating material is disposed on the front surface (inner surface) or the back surface (outer surface) of the front-rear flow channel 40 You may make it do. Thereby, generation
  • a heat insulating material is provided on the surface (inner surface) of the front-rear direction flow path 40, it is preferable that the convex portion 43 and the concave portion 44 are formed on the surface of the heat insulating material.
  • the thickness of the heat insulating material 31 is constant in the left-right direction, but has a slope that goes down in the direction toward the front-rear direction flow path 40 with the vicinity of the center in the left-right direction as a boundary. Also good.
  • ozone is generated by discharging the air into the air by the discharge device 8.
  • Ozone gas may be generated inside the body 9.
  • both the negatively charged moisture and ozone gas may be generated by the discharge device 8 and released into the housing 9.
  • the discharge of the discharge device 8 is performed during the air conditioning in the above example, but instead, it may be performed while the air conditioning is stopped. Furthermore, it may be performed while the air conditioning is stopped as well as during the air conditioning as in the above example. The discharge performed while the air conditioning is stopped may be performed intermittently at regular intervals, for example, or may be performed continuously.
  • Air conditioner 16 Outdoor unit control unit (control unit) 31 Heat insulation material (drain pan, left and right channel) 32 Convex (drain pan, left and right channel) 33 Concave portion (drain pan, left and right channel) 34 Recessed part (drain pan, left and right channel) 35 Front drain pan (drain pan, left and right channel) 40 Front-rear channel (drain pan) 42 Drain port 43 Convex part (drain pan) 44 Concave part (drain pan) 100 indoor unit 101 outdoor unit

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)

Abstract

This air conditioner includes an indoor unit (100) provided with: a cross-flow fan (4); an indoor heat exchanger (3); a drain pan (2) which is disposed below the indoor heat exchanger (3), which receives, at a surface thereof, dew condensation water generated at the indoor heat exchanger (3), which has formed therein a discharge port (42) for discharging the received dew condensation water to the outside of a room, and which has a projection (32) on the surface; and an indoor-unit control unit and an outdoor-unit control unit for circulating, through the indoor heat exchanger (3), refrigerant having an evaporation temperature lower than the evaporation temperature of refrigerant that circulates during a cooling operation and during a dehumidifying operation.

Description

空気調和機Air conditioner
　本発明は、空気調和機に関する。 The present invention relates to an air conditioner.
　空気調和機を構成する室内機には、室内熱交換器において発生した結露水を受けるドレンパンが備えられる。ドレンパンの構造に関する技術として、特許文献１に記載の技術が知られている。 The indoor unit that constitutes the air conditioner is provided with a drain pan that receives the condensed water generated in the indoor heat exchanger. As a technique related to the structure of the drain pan, a technique described in Patent Document 1 is known.
　特許文献１には、ドレンパンと前記ドレンパンの内壁に配置されるドレンパン用発泡断熱材において、凝縮水がドレンパンとドレンパン用発泡断熱材の間に流れ込んでドレンパンの外壁に露付きすることを防止すること及び作業工数を低減させることを目的に、ドレンパン用発泡断熱材の発泡倍率を低くし、凝縮水を排出させるドレンパン排出口とドレンパン用発泡断熱材排出口のみを接着させることを特徴とした空気調和機が記載されている。 In Patent Document 1, in the drain pan and the foam heat insulating material for the drain pan disposed on the inner wall of the drain pan, the condensed water is prevented from flowing between the drain pan and the foam heat insulating material for the drain pan and being exposed to the outer wall of the drain pan. The air conditioning is characterized by lowering the expansion ratio of the foam insulation for drain pans and reducing only the drain pan outlet for discharging condensed water and the foam insulation insulation outlet for drain pan for the purpose of reducing work man-hours. The machine is listed.
特開２００８－２９２１００号公報（特に図２を参照）JP 2008-292100 A (refer to FIG. 2 in particular)
　ところで、本発明者らは、冷房運転時及び除湿運転時に通流させる冷媒の蒸発温度よりも低い蒸発温度の冷媒を室内熱交換器に通流させ、室内熱交換器に敢えて結露水を発生させる技術を検討した。なお、ここでいう「結露水」には、室内熱交換器に直接付着する液体の水を含むほか、室内熱交換器に付着した霜が溶けて発生した液体の水を含むものとする。以下、「結露水」という場合には同義である。そして、このような技術により、発生した結露水がドレンパンに流れ落ちる際、室内熱交換器に付着した埃、油分等を洗い流すことができ、室内熱交換器を清浄に保つことができる。 By the way, the present inventors cause the refrigerant having an evaporation temperature lower than the evaporation temperature of the refrigerant to be passed during the cooling operation and the dehumidifying operation to flow through the indoor heat exchanger, and deliberately generate condensed water in the indoor heat exchanger. The technology was examined. The “condensation water” here includes liquid water directly adhering to the indoor heat exchanger and liquid water generated by melting frost adhering to the indoor heat exchanger. Hereinafter, the term “condensed water” is synonymous. And by such a technique, when the generated dew condensation water flows down to a drain pan, the dust, oil, etc. which adhered to the indoor heat exchanger can be washed away, and an indoor heat exchanger can be kept clean.
　ただ、この技術において、室内熱交換器には、前記のように、冷房運転時及び除湿運転時に通流させる冷媒の蒸発温度よりも低い蒸発温度の冷媒が通流する。そのため、瞬間的に発生する結露水の量は、冷房運転時及び除湿運転時に発生する結露水の量よりも多くなる。従って、ドレンパンに流れ落ちた結露水がドレンパンから溢れることを防止する観点から、ドレンパンに流れ落ちた結露水は速やかに外部に排出されることが好ましい。 However, in this technique, as described above, the refrigerant having an evaporation temperature lower than the evaporation temperature of the refrigerant to be passed during the cooling operation and the dehumidifying operation flows through the indoor heat exchanger. Therefore, the amount of condensed water that is instantaneously generated is larger than the amount of condensed water that is generated during cooling operation and dehumidifying operation. Therefore, from the viewpoint of preventing the condensed water flowing down to the drain pan from overflowing from the drain pan, it is preferable that the condensed water flowing down to the drain pan is quickly discharged to the outside.
　しかし、特許文献１に記載の技術では、ドレンパン外壁への露付き防止については考慮されているが、ドレンパンからの速やかな排水については考慮されていない。そのため、瞬間的に多量の結露水が発生した場合にドレンパンから速やかに排水し、ドレンパンから結露水が溢れることを防止可能な技術が望まれている。 However, in the technique described in Patent Document 1, prevention of dew condensation on the drain pan outer wall is considered, but rapid drainage from the drain pan is not considered. Therefore, there is a demand for a technique capable of quickly draining water from the drain pan when a large amount of condensed water is generated instantaneously, and preventing the water from overflowing from the drain pan.
　本発明はこのような課題に鑑みて為されたものであり、本発明が解決しようとする課題は、瞬間的に多量の結露水が発生した場合であってもドレンパンから結露水が溢れることを防止可能なドレンパンを備える空気調和機を提供することである。 The present invention has been made in view of such problems, and the problem to be solved by the present invention is that the condensed water overflows from the drain pan even when a large amount of condensed water is instantaneously generated. An object of the present invention is to provide an air conditioner including a preventable drain pan.
　本発明者らは前記課題を解決するために鋭意検討を行った結果、以下の知見を見出して本発明を完成させた。即ち、本発明の要旨は、貫流ファンと、室内熱交換器と、当該室内熱交換器の下方に配置されて前記室内熱交換器において発生した結露水を表面に受け、受けた結露水を室外に排水する排水口が形成されているとともに、表面で受けた結露水を前記排水口に導く凹凸を表面に有するドレンパンと、前記室内熱交換器に対し、冷房運転時及び除湿運転時に通流する冷媒の蒸発温度よりも低い蒸発温度の冷媒を通流させる制御部と、を備える室内機を有することを特徴とする、空気調和機に関する。 As a result of intensive studies to solve the above problems, the present inventors have found the following knowledge and completed the present invention. That is, the gist of the present invention is that the cross-flow fan, the indoor heat exchanger, and the condensed water generated in the indoor heat exchanger disposed below the indoor heat exchanger are received on the surface, and the received condensed water is outdoors. A drain outlet for draining water is formed, and a drain pan having concavities and convexities for guiding condensed water received on the surface to the drain outlet and the indoor heat exchanger are passed through during the cooling operation and the dehumidifying operation. The present invention relates to an air conditioner having an indoor unit including a control unit that causes a refrigerant having an evaporation temperature lower than an evaporation temperature of the refrigerant to flow.
　本発明によれば、瞬間的に多量の結露水が発生した場合であってもドレンパンから結露水が溢れることを防止可能なドレンパンを備える空気調和機を提供することができる。 According to the present invention, it is possible to provide an air conditioner including a drain pan that can prevent the dew condensation from overflowing from the drain pan even when a large amount of dew condensation water is instantaneously generated.
本実施形態の空気調和機を構成する室内機の断面図である。It is sectional drawing of the indoor unit which comprises the air conditioner of this embodiment. 本実施形態の空気調和機に備えられる冷凍サイクルを示す図である。It is a figure which shows the refrigerating cycle with which the air conditioner of this embodiment is equipped. 本実施形態の空気調和機において行われる凍結洗浄フローを示す図である。It is a figure which shows the freezing washing | cleaning flow performed in the air conditioner of this embodiment. 本実施形態の空気調和機を構成する室内機に備えられるドレンパンの様子を示す斜視図である。It is a perspective view which shows the mode of the drain pan with which the indoor unit which comprises the air conditioner of this embodiment is equipped. 本実施形態の空気調和機を構成する室内機において、ドレンパンと室内熱交換器との相対的な位置関係を示す断面図である。In the indoor unit which comprises the air conditioner of this embodiment, it is sectional drawing which shows the relative positional relationship of a drain pan and an indoor heat exchanger. 図４のＡ部拡大図である。It is the A section enlarged view of FIG. 図６のＢ－Ｂ線端面図である。FIG. 7 is an end view taken along line BB in FIG. 6. 図６のＣ－Ｃ線断面図である。FIG. 7 is a cross-sectional view taken along the line CC of FIG.
　以下、図面を適宜参照しながら本発明を実施するための形態（本実施形態）を説明する。ただし、参照する各図はあくまでも模式図である。また、本実施形態は以下に記載する事項に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲で任意に変更して実施可能である。 Hereinafter, a mode for carrying out the present invention (this embodiment) will be described with reference to the drawings as appropriate. However, each drawing referred to is a schematic diagram to the last. In addition, the present embodiment is not limited to the matters described below, and can be implemented with any changes without departing from the gist of the present invention.
　図１は、本実施形態の空気調和機１０（図２参照、図１では図示しない）を構成する室内機１００の断面図である。図１に示す状態では、貫流ファン４は停止し、かつ、前面パネル７及び上下風向板１８は閉じられて、室内機１００による空調運転は停止している。室内機１００は、貫流ファン４と、貫流ファン４を囲うように配置された室内熱交換器３と、室内熱交換器３の下方に配置されたドレンパン２とを備える。これらは筐体９に収容される。 FIG. 1 is a cross-sectional view of an indoor unit 100 constituting an air conditioner 10 (see FIG. 2, not shown in FIG. 1) of the present embodiment. In the state shown in FIG. 1, the cross-flow fan 4 is stopped, the front panel 7 and the vertical airflow direction plate 18 are closed, and the air conditioning operation by the indoor unit 100 is stopped. The indoor unit 100 includes a cross-flow fan 4, an indoor heat exchanger 3 disposed so as to surround the cross-flow fan 4, and a drain pan 2 disposed below the indoor heat exchanger 3. These are accommodated in the housing 9.
　室内熱交換器３は、フィン３ａ及び伝熱管３ｂを備える。この伝熱管３ｂに圧縮機１１（図２参照、図１では図示しない）からの冷媒が通流することでフィン３ａが加熱又は冷却される。これらのうち、特に伝熱管３ｂに冷たい冷媒が通流し、フィン３ａが冷却されると、フィン３ａの表面には結露水（前記のように凍結後解凍により生じた液体の水を含む）が発生する。そこで、この結露水は、室内熱交換器３の下方に配置されたドレンパン２に流れ落ちる。ドレンパン２の構造は、図４等を参照しながら後記する。 The indoor heat exchanger 3 includes fins 3a and heat transfer tubes 3b. The fins 3a are heated or cooled by allowing the refrigerant from the compressor 11 (see FIG. 2; not shown in FIG. 1) to flow through the heat transfer tubes 3b. Among these, in particular, when a cold refrigerant flows through the heat transfer tubes 3b and the fins 3a are cooled, condensed water (including liquid water generated by freezing and thawing as described above) is generated on the surfaces of the fins 3a. To do. Therefore, the condensed water flows down to the drain pan 2 disposed below the indoor heat exchanger 3. The structure of the drain pan 2 will be described later with reference to FIG.
　室内機１００の内部には、空調運転中に空気の流れを遮らない位置（具体的には正面側の上方）に、空気に対して放電を行う放電装置８が配置される。空気調和中に放電装置８の放電がなされると、筐体９の内部の空気中の水分にマイナスの電荷が荷電され、マイナスに荷電された水分が筐体９内に放出される。そして、このマイナスに荷電された水分は、貫流ファン４の回転駆動により室内に放出され、室内に存在する人の肌の保水性が高められる。 Inside the indoor unit 100, a discharge device 8 that discharges air is disposed at a position that does not block the flow of air during air-conditioning operation (specifically, above the front side). When the discharge device 8 is discharged during air conditioning, the moisture in the air inside the housing 9 is charged with a negative charge, and the negatively charged water is released into the housing 9. The negatively charged moisture is released into the room by the rotational drive of the cross-flow fan 4 and the water retention of human skin existing in the room is enhanced.
　また、図示はしないが、ドレンパン２の近傍には、ドレンパン２の内表面に紫外線を照射する紫外線照射装置が備えられる。室内機１００の空調運転停止中に紫外線照射装置によってドレンパン２に紫外線が照射されることで、ドレンパン２の殺菌が行われ、ドレンパン２でのかび等の発生が抑制される。 Although not shown, an ultraviolet irradiation device for irradiating the inner surface of the drain pan 2 with ultraviolet rays is provided in the vicinity of the drain pan 2. While the air conditioning operation of the indoor unit 100 is stopped, the drain pan 2 is sterilized by irradiating the drain pan 2 with ultraviolet rays, and the occurrence of fungi and the like in the drain pan 2 is suppressed.
　室内機１００の正面には、下方端部を中心として正面側に回動可能な前面パネル７が備えられる。また、室内機１００の下面には、その背面側端部を中心として下方に回動可能な上下風向板１８が備えられる。そして、室内機１００による空調運転が開始されるときには、前面パネル７が回動して上方が開口することで、図示しない空気吸込口が形成される。一方で、上下風向板１８が下方に回動して正面側下方が開口することで、図示しない空気吹出口が形成される。なお、室内機１００の上方には、予め開口した空気吸込口６ａが形成される。 The front panel 7 is provided in front of the indoor unit 100. The front panel 7 is pivotable to the front side with the lower end as the center. In addition, the lower surface of the indoor unit 100 is provided with an up / down airflow direction plate 18 that can be rotated downward about the rear side end portion thereof. And when the air-conditioning driving | operation by the indoor unit 100 is started, the front panel 7 rotates and upper direction opens, and the air suction inlet which is not shown in figure is formed. On the other hand, when the up-and-down air direction plate 18 is rotated downward and the front side lower side is opened, an air outlet (not shown) is formed. In addition, an air suction port 6 a that is opened in advance is formed above the indoor unit 100.
　そして、この状態で貫流ファン４が回転駆動することで、空気吸込口６ａと、前面パネル７の回動により形成された空気吸込口とから、フィルタ１５ａ，１５ｂを介して、筐体９の内部に室内の空気が吸い込まれる。吸い込まれた空気は、貫流ファン４を囲うように配置された室内熱交換器３によって熱交換された後、上下風向板１８の回動により形成された空気吹出口を通じて、室内に吹き出される。 In this state, the cross-flow fan 4 is rotationally driven, so that the inside of the housing 9 is passed from the air suction port 6a and the air suction port formed by the rotation of the front panel 7 through the filters 15a and 15b. The indoor air is sucked into the room. The sucked air is heat-exchanged by the indoor heat exchanger 3 arranged so as to surround the cross-flow fan 4 and then blown out into the room through an air outlet formed by the rotation of the vertical air direction plate 18.
　このとき、筐体９の内部では、放電装置８による放電が行われている。そのため、室内に吹き出される空気には、マイナスに荷電された水分が含まれている。そして、上下風向板１８の回動角度が制御されることで、上下方向の吹き出し位置が制御される。また、左右風向板１７も、その一端が回動可能になっており、左右風向板１７の回動角度が制御されることで、左右方向（図１において紙面手前と奥側との方向）の吹き出し位置が制御される。 At this time, the discharge by the discharge device 8 is performed inside the housing 9. Therefore, negatively charged moisture is included in the air blown into the room. And the blowing position of an up-down direction is controlled by controlling the rotation angle of the up-down wind direction board 18. As shown in FIG. Further, one end of the left / right wind direction plate 17 can also be rotated, and by controlling the rotation angle of the left / right wind direction plate 17, the left / right direction direction plate 17 can be moved in the left / right direction (the direction from the front side to the back side in FIG. 1). The blowing position is controlled.
　図２は、本実施形態の空気調和機１０に備えられる冷凍サイクルを示す図である。なお、図２において、図示の簡略化のために、室内機１００に備えられる部材を、図１に示したものから一部省略して示している。空気調和機１０は、前記の図１に示した室内機１００のほか、室外機１０１を有する。室内機１００と室外機１０１とは、冷媒配管５により、冷媒が循環可能に接続される。 FIG. 2 is a diagram showing a refrigeration cycle provided in the air conditioner 10 of the present embodiment. In FIG. 2, for simplification of illustration, members provided in the indoor unit 100 are partially omitted from those illustrated in FIG. 1. The air conditioner 10 includes an outdoor unit 101 in addition to the indoor unit 100 shown in FIG. The indoor unit 100 and the outdoor unit 101 are connected by a refrigerant pipe 5 so that the refrigerant can circulate.
　室内機１００は、前記のように室内熱交換器３及び貫流ファン４を備えるほか、室内機１００の運転を制御する室内機制御部１を備える。詳細は図３を参照しながら後記するが、本実施形態の空気調和機１０では、室内機１００による空調運転後に、室内熱交換器３に結露水を発生させる制御が行われる。そして、この結露水により、室内熱交換器３の洗浄が行われる。 The indoor unit 100 includes the indoor heat exchanger 3 and the cross-flow fan 4 as described above, and also includes the indoor unit control unit 1 that controls the operation of the indoor unit 100. Although details will be described later with reference to FIG. 3, in the air conditioner 10 of the present embodiment, after the air conditioning operation by the indoor unit 100, the indoor heat exchanger 3 is controlled to generate dew condensation water. And the indoor heat exchanger 3 is wash | cleaned with this dew condensation water.
　室内機制御部１は、いずれも図示しないが、ＣＰＵ（Central Processing Unit）、ＲＡＭ（Random Access Memory）、ＲＯＭ（Read Only Memory）、Ｉ／Ｆ（インターフェイス）等を備えて構成される。そして、室内機制御部１は、ＲＯＭに格納されている所定の制御プログラムがＣＰＵによって実行されることにより具現化される。 Although not shown, the indoor unit control unit 1 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), an I / F (interface), and the like. And the indoor unit control part 1 is embodied when the predetermined | prescribed control program stored in ROM is run by CPU.
　室外機１０１は、圧縮機１１と、四方弁１２と、室外ファン１３と、室外熱交換器１４と、膨張弁１５と、室外機制御部１６とを備える。圧縮機１１からは図２において矢印の方向に冷媒が吐出する。そして、四方弁１２によって吐出された冷媒の流路が切り替えられることで、室内機１００の運転モードが、暖房運転、冷房運転又は除湿運転のいずれかに切り替えられる。具体的には、室内機１００の運転モードが暖房運転のときには、図２に示す四方弁１２において、実線の流路で冷媒が流れる。一方で、室内機１００の運転モードが冷房運転及び除湿運転のときには、図２に示す四方弁１２において、破線の流路で冷媒が流れる。 The outdoor unit 101 includes a compressor 11, a four-way valve 12, an outdoor fan 13, an outdoor heat exchanger 14, an expansion valve 15, and an outdoor unit control unit 16. The refrigerant is discharged from the compressor 11 in the direction of the arrow in FIG. Then, by switching the flow path of the refrigerant discharged by the four-way valve 12, the operation mode of the indoor unit 100 is switched to any one of the heating operation, the cooling operation, and the dehumidifying operation. Specifically, when the operation mode of the indoor unit 100 is the heating operation, the refrigerant flows through the solid line in the four-way valve 12 shown in FIG. On the other hand, when the operation mode of the indoor unit 100 is the cooling operation and the dehumidifying operation, the refrigerant flows through the broken line in the four-way valve 12 shown in FIG.
　また、室外機１０１に備えられる膨張弁１５では、その開度が調整可能である。膨張弁１５の開度の調整は、室外機１０１の制御を行う室外機制御部１６からの指示信号に基づき、図示しないアクチュエータが駆動することで行われる。 Moreover, the opening degree of the expansion valve 15 provided in the outdoor unit 101 can be adjusted. Adjustment of the opening degree of the expansion valve 15 is performed by driving an actuator (not shown) based on an instruction signal from the outdoor unit control unit 16 that controls the outdoor unit 101.
　室外機制御部１６は、いずれも図示しないが、ＣＰＵ、ＲＡＭ、ＲＯＭ、Ｉ／Ｆ等を備えて構成される。そして、室外機制御部１６は、ＲＯＭに格納されている所定の制御プログラムがＣＰＵによって実行されることにより具現化される。なお、空気調和機１０の全体の制御は、この室外機制御部１６と前記の室内機制御部１とにより協動して行われる。 The outdoor unit control unit 16 includes a CPU, a RAM, a ROM, an I / F, and the like (not shown). The outdoor unit control unit 16 is realized by a predetermined control program stored in the ROM being executed by the CPU. The overall control of the air conditioner 10 is performed in cooperation with the outdoor unit controller 16 and the indoor unit controller 1 described above.
　本実施形態の空気調和機１０では、前記のように、室内機１００による空調運転後に、室内熱交換器３に結露水を発生させる制御が行われる。具体的には、室内熱交換器３に対して低温（例えば０℃以下）の冷媒を通流させることで、室内熱交換器３近傍の水分が室内熱交換器３の表面で凍結する。即ち、室内熱交換器３の表面に霜を発生させる蒸発温度の冷媒を室内熱交換器３に通流させることで、前記室内熱交換器の表面に霜が発生する。その後、暖房運転時の冷媒を通流させて室内熱交換器３を加熱して凍結した霜（水分）を解凍することで、発生した液体の結露水がドレンパン２（図１参照）に流される。これにより、空調中に筐体９に取り込まれ、室内熱交換器３に付着した微細な塵埃、油滴等が、結露水によって洗い流される。この制御について、図３を参照しながら説明する。 In the air conditioner 10 of the present embodiment, as described above, after the air conditioning operation by the indoor unit 100, the indoor heat exchanger 3 is controlled to generate condensed water. Specifically, by allowing a low-temperature (for example, 0 ° C. or lower) refrigerant to flow through the indoor heat exchanger 3, moisture near the indoor heat exchanger 3 is frozen on the surface of the indoor heat exchanger 3. In other words, frost is generated on the surface of the indoor heat exchanger by allowing the refrigerant having an evaporation temperature that generates frost on the surface of the indoor heat exchanger 3 to flow through the indoor heat exchanger 3. Then, the refrigerant | coolant at the time of heating operation is flowed, the indoor heat exchanger 3 is heated, and the frozen frost (water | moisture) is thawed, The generated condensed water of a liquid is poured into the drain pan 2 (refer FIG. 1). . As a result, fine dust, oil droplets and the like that are taken into the housing 9 during the air conditioning and attached to the indoor heat exchanger 3 are washed away by the condensed water. This control will be described with reference to FIG.
　図３は、本実施形態の空気調和機１０において行われる凍結洗浄フローを示す図である。このフローは、特に断らない限り、室内機制御部１と室外機制御部１６とが協動して行われる。まず、室内機１００による空調運転中、使用者が例えばリモコン等を操作することで、空調運転が停止される（ステップＳ１）。次いで、冷凍サイクル内の冷媒の状態を安定させるため、所定時間（例えば数分）の待機が行われる。所定時間の待機後、室外機制御部１６は、膨張弁１５（図２参照）の開度を絞る。具体的には、室内機１００の冷房運転時及び除湿運転時の開度よりも小さくなるように、膨張弁１５の開度が小さくされる。 FIG. 3 is a diagram showing a freeze cleaning flow performed in the air conditioner 10 of the present embodiment. This flow is performed in cooperation with the indoor unit control unit 1 and the outdoor unit control unit 16 unless otherwise specified. First, during the air conditioning operation by the indoor unit 100, the air conditioning operation is stopped by the user operating, for example, a remote controller (step S1). Next, in order to stabilize the state of the refrigerant in the refrigeration cycle, standby is performed for a predetermined time (for example, several minutes). After waiting for a predetermined time, the outdoor unit control unit 16 throttles the opening of the expansion valve 15 (see FIG. 2). Specifically, the opening degree of the expansion valve 15 is made smaller than the opening degree of the indoor unit 100 during the cooling operation and the dehumidifying operation.
　そして、室外機制御部１６は、四方弁１２の向きを、室内機１００が冷房運転時及び除湿運転時の方向の同じ方向にし、室内熱交換器３に冷媒を通流させる。この一連の動作により、膨張弁１５による膨張度合いが大きくなるため、室内熱交換器３には低温（例えば０℃以下）の冷媒が供給されることになる。これにより、室内熱交換器３は冷却される。この結果、筐体９の内部の空気に含まれる水分は室内熱交換器３の表面で凍結され、霜となる（ステップＳ２）。 And the outdoor unit control part 16 makes the direction of the four way valve 12 the same direction as the direction at the time of the air_conditionaing | cooling operation and the dehumidifying operation of the indoor unit 100, and makes the indoor heat exchanger 3 flow a refrigerant | coolant. As a result of this series of operations, the degree of expansion by the expansion valve 15 increases, and therefore, the indoor heat exchanger 3 is supplied with a low-temperature (for example, 0 ° C. or lower) refrigerant. Thereby, the indoor heat exchanger 3 is cooled. As a result, the moisture contained in the air inside the housing 9 is frozen on the surface of the indoor heat exchanger 3 and becomes frost (step S2).
　ここで、霜を付着させる際、室内熱交換器３を通流する冷媒の温度（蒸発温度）は、冷房運転時及び除湿運転時に通流する冷媒の蒸発温度よりも低い。そのため、室内熱交換器３において霜となった水の量は、冷房運転時及び除湿運転時に発生する結露水の量よりも多い。 Here, when attaching frost, the temperature (evaporation temperature) of the refrigerant flowing through the indoor heat exchanger 3 is lower than the evaporation temperature of the refrigerant flowing during the cooling operation and the dehumidifying operation. Therefore, the amount of water that has become frost in the indoor heat exchanger 3 is larger than the amount of condensed water that is generated during the cooling operation and the dehumidifying operation.
　次いで、室外機制御部１６は、所定時間経過後（例えば数分）、四方弁１２の方向を暖房運転時の方向に変更し、圧縮機１１から吐出された高温の冷媒を室内熱交換器３に供給する。これにより、室内熱交換器３は加熱され、室内熱交換器３の表面の霜が解凍される（ステップＳ３）。そして、解凍されて発生した結露水は、ドレンパン２に流れ落ちる。これにより、室内熱交換器３に付着していた塵埃、油滴等がドレンパン２に洗い流され、「洗浄」と同じ効果が得られる。 Next, the outdoor unit control unit 16 changes the direction of the four-way valve 12 to the direction during the heating operation after a predetermined time has elapsed (for example, several minutes), and converts the high-temperature refrigerant discharged from the compressor 11 into the indoor heat exchanger 3. To supply. Thereby, the indoor heat exchanger 3 is heated and the frost on the surface of the indoor heat exchanger 3 is thawed (step S3). The condensed water generated by thawing flows down to the drain pan 2. Thereby, dust, oil droplets, etc. adhering to the indoor heat exchanger 3 are washed away to the drain pan 2, and the same effect as “cleaning” is obtained.
　前記のように、霜となっていた水の量は、冷房運転時及び除湿運転時に発生する結露水よりも多い量である。そのため、ドレンパン２に瞬間的に流れ落ちる水量も、冷房運転時及び除湿運転時に発生する結露水の水量よりも多い。そして、ドレンパン２に流れ落ちた結露水は、詳細は後記するが、排水口４２（図４等参照、図３では図示しない）速やかに室外に排出される。 As described above, the amount of water that has become frost is larger than the amount of condensed water that is generated during cooling operation and dehumidifying operation. Therefore, the amount of water that instantaneously flows down to the drain pan 2 is larger than the amount of condensed water generated during the cooling operation and the dehumidifying operation. Condensed water that has flowed down to the drain pan 2 is quickly discharged outside the drain 42 (see FIG. 4 and the like, not shown in FIG. 3), as will be described in detail later.
　そして、所定時間経過後、室外機制御部１６は貫流ファン４の駆動を開始する。これにより、筐体９の内部で空気が循環し、室内熱交換器３に空気が接触する結果、室内熱交換器３が乾燥される（ステップＳ４）。 Then, after a predetermined time has elapsed, the outdoor unit control unit 16 starts driving the cross-flow fan 4. Thereby, air circulates inside the housing 9 and as a result of the air coming into contact with the indoor heat exchanger 3, the indoor heat exchanger 3 is dried (step S4).
　この図３を参照しながら説明したように、室内熱交換器３の表面で水分を凍結及び解凍することで、室内熱交換器３の所謂「洗浄」が行われる。そして、この一連の動作により、ドレンパン２には、前記のように、通常の運転モード（冷房運転及び除湿運転）の際に発生する結露水の量よりも多量の結露水が瞬間的に流れ込む。そこで、瞬間的に多量の結露水が流れ込んだ場合であってもドレンパン２から溢れださずに速やかに排水されるように、ドレンパン２が構成されている。以下、ドレンパン２の構成を中心に説明を続ける。 As described with reference to FIG. 3, so-called “cleaning” of the indoor heat exchanger 3 is performed by freezing and thawing moisture on the surface of the indoor heat exchanger 3. As a result of this series of operations, a larger amount of condensed water than the amount of condensed water generated in the normal operation mode (cooling operation and dehumidifying operation) flows instantaneously into the drain pan 2 as described above. Therefore, the drain pan 2 is configured so that even if a large amount of condensed water flows instantaneously, the drain pan 2 is quickly drained without overflowing. Hereinafter, description will be continued focusing on the configuration of the drain pan 2.
　図４は、本実施形態の空気調和機１０を構成する室内機１００に備えられるドレンパン２の様子を示す斜視図である。このドレンパン２は、前記のように室内熱交換器３の下方に配置されたものである。ドレンパン２は、例えばアクリロニトリル－ブタジエン－スチレン共重合樹脂（ＡＢＳ樹脂）、ポリスチレン等の樹脂により構成される。また、ドレンパン２を構成する樹脂には、ドレンパン２でのかび等の発生を抑制するために、例えばイミダゾール系等の抗菌剤が含まれている。なお、ドレンパン２は、例えば鏡面加工された金型に樹脂材料を充填して固化させることで成型される。 FIG. 4 is a perspective view showing a state of the drain pan 2 provided in the indoor unit 100 constituting the air conditioner 10 of the present embodiment. The drain pan 2 is disposed below the indoor heat exchanger 3 as described above. The drain pan 2 is made of, for example, a resin such as acrylonitrile-butadiene-styrene copolymer resin (ABS resin) or polystyrene. Moreover, in order to suppress generation | occurrence | production of the mold | fungi etc. in the drain pan 2, the resin which comprises the drain pan 2 contains antibacterial agents, such as an imidazole series, for example. The drain pan 2 is molded, for example, by filling a resin material in a mirror-finished mold and solidifying it.
　ドレンパン２は、室内機１００の正面視で左右方向に延在する前ドレンパン３５（図５参照、図４では図示しない。左右方向流路）を備える。そして、前ドレンパン３５の内面では、平板状の断熱材３１（左右方向流路）が、前記の室内熱交換器３で発生した結露水を受ける位置に配置される。ただし、この断熱材３１は、その正面側及び背面側のそれぞれ端部において上方に延びることで容器形状になっている。 The drain pan 2 includes a front drain pan 35 (see FIG. 5, not shown in FIG. 4, left-right flow path) extending in the left-right direction when the indoor unit 100 is viewed from the front. And on the inner surface of the front drain pan 35, the flat heat insulating material 31 (left-right direction flow path) is arrange | positioned in the position which receives the dew condensation water which generate | occur | produced in the said indoor heat exchanger 3. FIG. However, the heat insulating material 31 is formed in a container shape by extending upward at the respective end portions on the front side and the back side.
　断熱材３１は、前ドレンパン３５（図５参照）の内表面に形成された窪み（図示しない）に接着材を塗布した後に嵌められることで、前ドレンパン３５の内表面に固定される。このとき、断熱材３１として、弾力性を有し、かつ、当該窪みよりもやや大きな断熱材３１を使用することで、窪みの内側面と断熱材３１との間で隙間の発生が抑制される。なお、断熱材３１には、断熱材３１でのかび等の発生を抑制するために、例えばイミダゾール系等の抗菌剤が含まれている。 The heat insulating material 31 is fixed to the inner surface of the front drain pan 35 by being fitted after applying an adhesive to a recess (not shown) formed on the inner surface of the front drain pan 35 (see FIG. 5). At this time, generation of a gap between the inner surface of the recess and the heat insulating material 31 is suppressed by using the heat insulating material 31 having elasticity and slightly larger than the hollow as the heat insulating material 31. . In addition, in order to suppress generation | occurrence | production of the mold | fungi etc. in the heat insulating material 31, the heat insulating material 31 contains antibacterial agents, such as an imidazole series, for example.
　また、前ドレンパン３５（図５参照）の左右両端（即ち、断熱材３１の左右両端）のそれぞれには、ドレンパン２の一部として、正面から背面に向かって延在する前後方向流路４０が接続される。なお、詳細は後記するが、左右のそれぞれに配置された前後方向流路４０の背面側には、ドレンパン２で受けた結露水を室外に排水するための排水口４２が形成される。 Moreover, the front-rear direction flow path 40 extending from the front to the back as a part of the drain pan 2 is provided at each of the left and right ends of the front drain pan 35 (see FIG. 5) (that is, the left and right ends of the heat insulating material 31). Connected. Although details will be described later, a drain port 42 for draining the dew condensation water received by the drain pan 2 to the outside is formed on the back side of the front-rear direction flow path 40 disposed on each of the left and right sides.
　断熱材３１の表面には、左右方向に延びる凸部３２と、凸部３２の正面側と背面側とにそれぞれ配置された凹部３３，３４とが形成される。凸部３２及び凹部３３，３４（それぞれドレンパン２に形成された凹凸に相当）は、いずれも、表面で受けた結露水を前後方向流路４０に導くようにして断熱材３１の表面に形成されたものである。 On the surface of the heat insulating material 31, convex portions 32 extending in the left-right direction, and concave portions 33 and 34 arranged on the front side and the back side of the convex portions 32 are formed. Both the convex portion 32 and the concave portions 33 and 34 (corresponding to the concave and convex portions formed on the drain pan 2) are formed on the surface of the heat insulating material 31 so as to guide the dew condensation water received on the surface to the front-rear direction flow path 40. It is a thing.
　凸部３２は左右方向に連続的に形成されており、その幅（正面－背面方向の長さ）は左右方向全域で一様な長さになっている。さらに、凹部３３，３４も左右方向に連続的に形成されており、その幅（正面－背面の長さ）も左右方向全域で一様な長さになっている。そして、凸部３２は、正面－背面方向（以下、前後方向という）の中央に、左右方向に延在して形成される。 The convex portion 32 is continuously formed in the left-right direction, and the width (length in the front-rear direction) is uniform throughout the left-right direction. Further, the recesses 33 and 34 are also formed continuously in the left-right direction, and the width (front-back length) is also uniform in the entire left-right direction. The convex portion 32 is formed to extend in the left-right direction at the center in the front-back direction (hereinafter referred to as the front-rear direction).
　また、断熱材３１の表面では、凸部３２の高さは一定になっている。即ち、断熱材３１の表面には、後記する前後方向流路４０に向かって下る傾斜が形成されておらず、凸部３２の全体が同一平面内に形成される。ちなみに、断熱材３１の厚さも、左右方向で一定である。これらの構成により、仮に室内機１００が室内で傾いて取り付けられた場合でも、結露水が断熱材３１の表面で溜まることが無く、左右いずれかの前後方向流路４０に至らせることができる。 Further, the height of the convex portion 32 is constant on the surface of the heat insulating material 31. In other words, the surface of the heat insulating material 31 is not formed with an inclination downward toward the front-rear direction channel 40 described later, and the entire convex portion 32 is formed in the same plane. Incidentally, the thickness of the heat insulating material 31 is also constant in the left-right direction. With these configurations, even when the indoor unit 100 is attached to be inclined in the room, condensed water does not accumulate on the surface of the heat insulating material 31 and can reach either the left or right front-rear direction flow path 40.
　断熱材３１は、例えば発泡スチロール、発泡ウレタン等の吸湿しない材料で構成され、その表面は撥水性になっている。即ち、断熱材３１において、結露水が流れる部分には撥水性の表面が配置される。これにより、断熱材３１に結露水が流れ落ちた場合に、断熱材３１の表面の結露水が蒸発し易くなり、結露水の後残りが生じにくい。また、断熱材３１は吸湿しないため、断熱材３１が含水してしまう結果生じるかび等の発生が抑制される。なお、断熱材３１は、例えば鏡面加工された金型に樹脂材料を充填し、発泡させることで成型される。 The heat insulating material 31 is made of a material that does not absorb moisture, such as foamed polystyrene or foamed urethane, and its surface is water repellent. That is, in the heat insulating material 31, a water-repellent surface is disposed at a portion where condensed water flows. Thereby, when the dew condensation water flows down to the heat insulating material 31, the dew condensation water on the surface of the heat insulating material 31 becomes easy to evaporate, and the remainder after the dew condensation water hardly occurs. Moreover, since the heat insulating material 31 does not absorb moisture, generation | occurrence | production of the mold etc. which arise as a result of the heat insulating material 31 containing water is suppressed. The heat insulating material 31 is molded, for example, by filling a resin material into a mirror-finished mold and foaming.
　前後方向流路４０の背面側には、ドレンパン２に流れ落ちた結露水を室外に排水するための排水管（図示しない）に接続された排水口４２が形成される。そして、詳細は図８を参照しながら後記するが、前後方向流路４０の背面側の底面には、排水口４２に向かって下る傾斜が形成される。これにより、ドレンパン２に流れ落ちた結露水が排水口４２に導かれ易くなる。 A drain port 42 connected to a drain pipe (not shown) for draining the condensed water that has flowed down to the drain pan 2 to the outside is formed on the back side of the front-rear channel 40. The details will be described later with reference to FIG. 8, and a slope that is lowered toward the drain outlet 42 is formed on the bottom surface on the back side of the front-rear direction flow path 40. Thereby, the dew condensation water that has flowed down to the drain pan 2 is easily guided to the drain port 42.
　前後方向流路４０の裏側には、その正面側に、左右風向板１７を駆動させるためのモータ（図示しない）が配置される。そのため、前後方向流路４０の正面側は盛り上がっており、盛り上がり部４１が形成される。この盛り上がり部４１の高さは、前記の断熱材３１に形成された凹部３３の高さよりもわずかに低い程度である。そのため、断熱材３１から前後方向流路４０に導かれた結露水は、断熱材３１の側への逆流が防止される。なお、断熱材３１から盛り上がり部４１に至った結露水は、盛り上がり部４１を降りて排水口４２に導かれる。 A motor (not shown) for driving the left and right wind direction plates 17 is disposed on the back side of the front-rear direction flow path 40 on the front side. Therefore, the front side of the front-rear direction flow path 40 is raised, and a raised portion 41 is formed. The height of the raised portion 41 is slightly lower than the height of the concave portion 33 formed in the heat insulating material 31. Therefore, the dew condensation water guided from the heat insulating material 31 to the front-rear direction flow path 40 is prevented from flowing back to the heat insulating material 31 side. The condensed water that reaches the rising portion 41 from the heat insulating material 31 descends the rising portion 41 and is guided to the drain port 42.
　なお、前後方向流路４０の内側表面には、前記の前ドレンパン３５（図５参照）とは異なり、断熱材は配置されていない。そのため、前記の断熱材３１と前後方向流路３０の内表面に配置される断熱材とが一体になったような複雑な形状の断熱材３１を用意する必要が無く、製造コストの安価化が図られる In addition, unlike the front drain pan 35 (see FIG. 5), a heat insulating material is not disposed on the inner surface of the front-rear direction flow path 40. Therefore, it is not necessary to prepare the heat insulating material 31 having a complicated shape in which the heat insulating material 31 and the heat insulating material arranged on the inner surface of the front-rear direction flow path 30 are integrated, and the manufacturing cost can be reduced. Illustrated
　また、ドレンパン２は、前記のように鏡面加工された金型を使用して成型される。そのため、ドレンパン２の表面ではほぼ平滑になっている。従って、前後方向流路４０において、結露水が流れる部分は撥水性になっている。これにより、結露水が蒸発し易くなり、結露水の後残りが生じにくい。 Also, the drain pan 2 is molded using the mirror-finished mold as described above. Therefore, the surface of the drain pan 2 is almost smooth. Therefore, in the front-rear direction flow path 40, the portion where the condensed water flows is water repellent. As a result, the condensed water easily evaporates, and the remainder after the condensed water is unlikely to occur.
　図５は、本実施形態の空気調和機１０を構成する室内機１００において、ドレンパン２と室内熱交換器３との相対的な位置関係を示す断面図である。図５に示すように、室内熱交換器３を構成するフィン３ａとドレンパン２を構成する断熱材３１とは接触している。具体的には、断熱材３１の凹部３４にフィン３ａが接触することで、断熱材３１の背面側内側面と室内熱交換器３の下方背面側端部とが接触している。 FIG. 5 is a cross-sectional view showing a relative positional relationship between the drain pan 2 and the indoor heat exchanger 3 in the indoor unit 100 constituting the air conditioner 10 of the present embodiment. As shown in FIG. 5, the fins 3 a constituting the indoor heat exchanger 3 and the heat insulating material 31 constituting the drain pan 2 are in contact with each other. Specifically, the fins 3 a are in contact with the recesses 34 of the heat insulating material 31, so that the back side inner surface of the heat insulating material 31 and the lower back side end of the indoor heat exchanger 3 are in contact.
　このような配置により、室内熱交換器３の下背面側端部と、断熱材３１の背面側内側面との間には、隙間が形成されない。そのため、貫流ファン４（図１参照）の回転により正面側から背面側に空気が通流する際（図５において白抜きの矢印）、室内熱交換器３の下方背面側端部と、断熱材３１の背面側内側面との間の隙間を通じた空気の抜けが防止される。特に、凹部３４に隣接して凸部３２が形成されることで、この凸部３２が障害となって空気が流れにくくなることから、そのような抜けが確実に防止される。この結果、室内熱交換器３での熱交換量を増やし、エネルギ効率が高められる。さらには、断熱材３１を掠めるようにした空気の抜けが防止されるため、断熱材３１の表面に存在し得る水滴が室内に飛散することが防止される。 With this arrangement, no gap is formed between the lower back side end of the indoor heat exchanger 3 and the back side inner surface of the heat insulating material 31. Therefore, when air flows from the front side to the back side by the rotation of the once-through fan 4 (see FIG. 1) (the white arrow in FIG. 5), the lower back side end of the indoor heat exchanger 3 and the heat insulating material The escape of air through the gap between the back side inner surface of 31 is prevented. In particular, since the convex portion 32 is formed adjacent to the concave portion 34, the convex portion 32 becomes an obstacle and it becomes difficult for air to flow. As a result, the amount of heat exchange in the indoor heat exchanger 3 is increased, and energy efficiency is increased. Furthermore, since the escape of the air that is intended to give up the heat insulating material 31 is prevented, water droplets that may be present on the surface of the heat insulating material 31 are prevented from scattering into the room.
　また、室内熱交換器３のフィン３ａと断熱材３１とが接触していることで、フィン３ａを流れ落ちた結露水が断熱材３１に移動し易くなる。即ち、これらの間に隙間があいていれば、その隙間の間で結露水が落下することになるが、フィン３ａと断熱材３１とが接触していることで、フィン３ａの表面張力を利用して結露水が流れ落ちることになる。これにより、結露水の落下速度を速め、ドレンパン２を利用して速やかに室外に結露水が排水される。 In addition, since the fins 3 a of the indoor heat exchanger 3 and the heat insulating material 31 are in contact with each other, the condensed water that has flowed down the fins 3 a easily moves to the heat insulating material 31. That is, if there is a gap between them, the condensed water will fall between the gaps, but the surface tension of the fin 3a is utilized because the fin 3a and the heat insulating material 31 are in contact with each other. Condensed water will flow down. As a result, the falling speed of the condensed water is increased, and the condensed water is quickly drained to the outside using the drain pan 2.
　図６は、図４のＡ部拡大図である。図６において太線矢印は、凹部３３，３４のそれぞれに流れ落ちた結露水が流れる方向を示している。 FIG. 6 is an enlarged view of part A in FIG. In FIG. 6, thick arrows indicate the directions in which the condensed water that has flowed down into the recesses 33 and 34 flows.
　断熱材３１には、前記のように、ドレンパン２の上方に配置された室内熱交換器３（図４では図示しない）に付着した結露水が流れ落ちる。そして、流れ落ちた結露水は、凸部３２に沿って凹部３３，３４を通流して前後方向流路４０に導かれる。このとき、凹部３３を通流する結露水は、盛り上がり部４１を経由して、前後方向流路４０に至る。一方で、凹部３４を通流する結露水は、直接、前後方向流路４０に至る。 As described above, condensed water that has adhered to the indoor heat exchanger 3 (not shown in FIG. 4) disposed above the drain pan 2 flows down to the heat insulating material 31. The dew condensation water that has flowed down flows through the concave portions 33 and 34 along the convex portion 32 and is guided to the front-rear direction flow path 40. At this time, the dew condensation water flowing through the concave portion 33 reaches the front-rear direction flow path 40 via the rising portion 41. On the other hand, the dew condensation water flowing through the concave portion 34 directly reaches the front-rear direction flow path 40.
　ドレンパン２に流れ落ちる結露水は、室内機１００での冷房運転時及び除湿運転時に発生するもののほか、前記のように凍結（前記の図３のステップＳ２を参照）により発生したものも含まれる。特に、凍結時に発生した結露水は、霜を解凍したものであるから、冷房運転時及び除湿運転時に発生する結露水よりも低温である。そのため、断熱材３１の上に低温の結露水が流れ落ちることで、前ドレンパン３５（図５参照、図６では図示しない）が冷やされにくい。この結果、前ドレンパン３５の裏面（断熱材３１が配置された側とは反対側）が結露することが防止される。これにより、前ドレンパン３５の裏面側に形成された、室内機１００が設置される室内に臨む通風路に水が垂れることが防止され、室内への水の飛散が防止される。さらには、当該通風路が広く確保される結果、通風抵抗の増大が防止される Condensed water flowing down to the drain pan 2 includes not only water generated during cooling operation and dehumidifying operation in the indoor unit 100, but also water generated by freezing as described above (see step S2 in FIG. 3). In particular, the dew condensation water generated at the time of freezing is defrosted frost, so that it is at a lower temperature than the dew condensation water generated during the cooling operation and the dehumidification operation. Therefore, when the low-temperature dew condensation water flows down on the heat insulating material 31, the front drain pan 35 (see FIG. 5 and not shown in FIG. 6) is not easily cooled. As a result, the back surface of the front drain pan 35 (the side opposite to the side on which the heat insulating material 31 is disposed) is prevented from condensing. This prevents water from dripping into the ventilation path that faces the room where the indoor unit 100 is installed, which is formed on the back side of the front drain pan 35, and prevents water from scattering into the room. Furthermore, as a result of ensuring the ventilation path widely, an increase in ventilation resistance is prevented.
　また、断熱材３１の正面側端部及び背面側端部はいずれも上方向に延びている。これにより、ドレンパン２の上方に配置された室内熱交換器３（図４では図示しない）から断熱材３１に流れ落ちた結露水が正面側及び背面側に漏出することが防止される。一方で、断熱材３１の左右両端では、いずれも上方向に延びていない。これにより、断熱材３１に流れ落ちた結露水は、凸部３２に沿って、その左右両端に接続された前後方向流路４０に導かれる。 Further, both the front side end and the back side end of the heat insulating material 31 extend upward. Thereby, it is prevented that the dew condensation water which flowed down to the heat insulating material 31 from the indoor heat exchanger 3 (not shown in FIG. 4) arranged above the drain pan 2 leaks to the front side and the back side. On the other hand, neither of the left and right ends of the heat insulating material 31 extends upward. Thereby, the dew condensation water that has flowed down to the heat insulating material 31 is guided along the convex portion 32 to the front-rear direction flow path 40 connected to the left and right ends thereof.
　ここで、断熱材３１の表面には、前後方向流路４０に向かって左右方向に延びる凸部３２が形成される。そして、本発明者らが検討したところ、断熱材３１に流れ落ちた結露水は、連続的に形成された凸部３２を構成する壁面に沿って流れ易いことがわかった。そのため、排水口４２に結露水を導くことが可能な凸部３２が形成されることで、結露水が途中で途切れることなく連続して流れることができ、左右両端に形成された前後方向流路４０に導かれ易くなる。これにより、断熱材３１の表面への結露水の後残りが抑制される。 Here, convex portions 32 extending in the left-right direction toward the front-rear direction flow path 40 are formed on the surface of the heat insulating material 31. And when the present inventors examined, it turned out that the dew condensation water which flowed down to the heat insulating material 31 flows easily along the wall surface which comprises the convex part 32 formed continuously. Therefore, the convex part 32 which can guide dew condensation water to the drain port 42 is formed, and dew condensation water can flow continuously without interruption on the way, The front-back direction flow path formed in both right and left ends 40 is easily guided. Thereby, the remainder after the dew condensation water on the surface of the heat insulating material 31 is suppressed.
　また、断熱材３１の前後方向の中央に凸部３２が形成されることで、断熱材３１の表面で水滴同士が結合して過度に成長することが防止される。これにより、断熱材３１の表面において結露水の水滴が小さいまま維持され、結露水が移動（即ち排水）され易くなる。 In addition, since the convex portion 32 is formed at the center in the front-rear direction of the heat insulating material 31, it is possible to prevent water droplets from being combined and growing excessively on the surface of the heat insulating material 31. Thereby, the water droplets of the condensed water are kept small on the surface of the heat insulating material 31, and the condensed water is easily moved (that is, drained).
　前後方向流路４０に導かれた結露水は、その表面に形成された凸部４３及び凹部４４により、排水口４２に導かれる。前後方向流路４０の表面形状について、図７を参照しながら説明する。 The condensed water guided to the front-rear direction flow path 40 is guided to the drain port 42 by the convex part 43 and the concave part 44 formed on the surface thereof. The surface shape of the front-rear channel 40 will be described with reference to FIG.
　図７は、図６のＢ－Ｂ線端面図である。この図７は、前後方向流路４０での結露水の流れ方向から視たときの前後方向流路４０の端面の様子を示す図である。前後方向流路４０の上表面には、等間隔に形成された凸部４３と、隣接する凸部４３，４３の間に形成された凹部４４とが備えられている。凸部４３は、本実施形態では四つ形成される。凸部４３及び凹部４４は、ドレンパン２の成型時に、凸部４３及び凹部４４に対応する位置及び大きさで凹及び凸が形成された金型を使用することで、ドレンパン２と一体に形成される。 FIG. 7 is an end view taken along the line BB of FIG. FIG. 7 is a diagram illustrating a state of an end face of the front-rear direction channel 40 when viewed from the flow direction of the dew condensation water in the front-rear direction channel 40. On the upper surface of the front-rear direction flow path 40, a convex portion 43 formed at equal intervals and a concave portion 44 formed between adjacent convex portions 43, 43 are provided. Four convex portions 43 are formed in the present embodiment. The convex portion 43 and the concave portion 44 are formed integrally with the drain pan 2 by using a mold in which concave and convex portions are formed at positions and sizes corresponding to the convex portion 43 and the concave portion 44 when the drain pan 2 is molded. The
　なお、凸部４３及び凹部４４は、前記の図６に示すように、図７に示す形状で、それぞれ、前後方向流路４０の前後方向に連続的に形成される（図６を併せて参照）。 In addition, as shown in the said FIG. 6, the convex part 43 and the recessed part 44 are continuously formed in the front-back direction of the front-back direction flow path 40 in the shape shown in FIG. 7, respectively (refer also to FIG. 6). ).
　凸部４３は、上部の二つの端部が面取りされたような断面略矩形状である。凸部４３の断面形状が略矩形状となっていることで、凸部４３の上面と結露水との接触面積が増加する。これにより、凸部４３の上面が撥水性になっていることと相俟って、凸部４３を跨ぐようにした水滴の成長が抑制される。そのため、水滴が小さいまま維持され、結露水の水滴が排水口４２（図６参照）に導かれ易くなる。 The convex portion 43 has a substantially rectangular cross section in which two upper end portions are chamfered. Since the cross-sectional shape of the convex portion 43 is substantially rectangular, the contact area between the upper surface of the convex portion 43 and the condensed water increases. Thereby, coupled with the fact that the upper surface of the convex portion 43 is water-repellent, the growth of water droplets that straddle the convex portion 43 is suppressed. Therefore, the water droplets are kept small, and the water droplets of the dew condensation water are easily guided to the drain port 42 (see FIG. 6).
　また、前記の断熱材３１を構成する凸部３２において説明したのと同様に、結露水の水滴は、排水口４２に導かれるように形成された凸部４３に沿って凹部４４を流れ易い。そのため、凸部４３によって成長が抑制された結果、小さいままの水滴は、凸部４３及び凹部４４により、排水口４２に導かれ易くなる。 Also, as described in the convex portion 32 constituting the heat insulating material 31, the water droplets of the dew condensation water easily flow through the concave portion 44 along the convex portion 43 formed so as to be guided to the drain port 42. Therefore, as a result of the growth being suppressed by the convex portion 43, small water droplets are easily guided to the drain port 42 by the convex portion 43 and the concave portion 44.
　そして、前後方向流路４０に流し込まれた結露水が排水口４２に流れ易くなる結果、前後方向流路４０からは速やかに結露水が消失する。そのため、前記のように低温の結露水が前後方向流路４０に残留し難くなる。この結果、前後方向流路４０が過度に冷やされることが防止され、前後方向流路４０に断熱材を設けなくても、裏面での結露が防止される。これにより、前後方向流路４０の裏面側に形成された、室内機１００が設置される室内に臨む通風路に水が垂れることが防止され、室内への水の飛散が防止される。 And, as a result of the dew condensation water flowing into the front-rear direction channel 40 becoming easier to flow to the drain outlet 42, the dew condensation water disappears quickly from the front-rear direction channel 40. Therefore, as described above, low-temperature dew condensation water hardly remains in the front-rear direction flow path 40. As a result, the front-rear channel 40 is prevented from being excessively cooled, and dew condensation on the back surface is prevented without providing a heat insulating material in the front-rear channel 40. Thereby, water is prevented from dripping into the ventilation path formed on the back surface side of the front-rear direction flow path 40 and facing the room where the indoor unit 100 is installed, and scattering of water into the room is prevented.
　なお、凸部４３の左右方向の幅（長さＬ１）は例えば３ｍｍ程度である。さらに、凸部４３と当該凸部４３に隣接する凸部４３との中心間距離（長さＬ２）は例えば４ｍｍ程度である。そして、凸部４３の高さ（長さＬ３）は例えば０．３ｍｍ程度である。 Note that the width (length L1) of the convex portion 43 in the left-right direction is, for example, about 3 mm. Furthermore, the center-to-center distance (length L2) between the protrusion 43 and the protrusion 43 adjacent to the protrusion 43 is, for example, about 4 mm. And the height (length L3) of the convex part 43 is about 0.3 mm, for example.
　図８は、図６のＣ－Ｃ線断面図である。この図８は、前後方向流路４０での結露水の流れ方向に水平面内で垂直な方向から視たときの、排水口４２の近傍の様子を示す図である。図８に示すように、前後方向流路４０では、背面側に形成された排水口４２に向かって下る傾斜が形成される。即ち、境界部４５を起点として正面側では前後方向流路４０は水平に延在するが、境界部４５を起点として背面側では、排水口４２に向かって下る傾斜が形成される。これにより、凸部４３に沿って凹部４４を背面に向かって流れてきた結露水が、下る傾斜により流速が加速され、排水口４２を通じて排水され易くなる。 FIG. 8 is a cross-sectional view taken along the line CC of FIG. FIG. 8 is a view showing a state in the vicinity of the drain port 42 when viewed from a direction perpendicular to the flow direction of the dew condensation water in the front-rear direction flow path 40 in a horizontal plane. As shown in FIG. 8, in the front-rear direction flow path 40, an inclination is formed that descends toward the drain port 42 formed on the back side. That is, the front-rear direction flow path 40 extends horizontally on the front side starting from the boundary 45, but a slope is formed downward toward the drain outlet 42 on the back side starting from the boundary 45. As a result, the condensed water that has flowed along the convex portion 43 toward the back surface through the concave portion 44 is accelerated by the downward slope, and is easily drained through the drain port 42.
　ここで、室内機１００の設置状況によっては、誤って排水口４２に栓が為され、排水口４２が閉塞される可能性がある。この場合、断熱材３１から前後方向流路４０に流れてきた結露水は、排水されずに前後方向流路４０に滞留することになる。しかし、本実施形態の空気調和機１０では、排水口４２の近傍に傾斜が形成されていることから、排水口４２の近傍に優先的に溜まることになる。そして、この傾斜をある程度緩やかにして深さを浅くすれば、この近傍の部分では、溜まる水の量が少なくなる。そのため、結露水が溜まったとしても、溜まった結露水は蒸発し易い。この結果、排水口４２が閉塞された場合でも前後方向流路４０の全面に結露水が滞留して、前後方向流路４０の裏面で結露してしまうことが防止される。 Here, depending on the installation status of the indoor unit 100, there is a possibility that the drain port 42 is accidentally plugged and the drain port 42 is blocked. In this case, the dew condensation water that has flowed from the heat insulating material 31 to the front-rear channel 40 is retained in the front-rear channel 40 without being drained. However, in the air conditioner 10 of this embodiment, since the inclination is formed in the vicinity of the drain port 42, the air conditioner 10 is preferentially collected in the vicinity of the drain port 42. Then, if this slope is moderated and the depth is made shallower, the amount of accumulated water is reduced in the vicinity. Therefore, even if condensed water accumulates, the accumulated condensed water tends to evaporate. As a result, even when the drain port 42 is blocked, the dew condensation water stays on the entire surface of the front-rear channel 40 and is prevented from condensing on the back surface of the front-rear channel 40.
　なお、排水口４２の近傍とは、本明細書では、境界部４５が形成される位置（排水口４２の端部からの距離Ｌ４）及び傾斜の程度（前後方向流路４０の水平面からの深さＬ５）により規定可能である。即ち、Ｌ４及びＬ５により滞留する結露水の量が決定されるため、室内機１００が設置される地域等を考慮して例えば数時間程度で蒸発可能な量を決定し、その量よりも大きくなる体積となるようにＬ４及びＬ５が決定される。Ｌ４は例えば３０ｍｍ程度であり、Ｌ５は例えば数ｍｍ程度である。 In the present specification, the vicinity of the drain port 42 refers to the position where the boundary 45 is formed (distance L4 from the end of the drain port 42) and the degree of inclination (depth from the horizontal plane of the front-rear channel 40). It can be defined by the length L5). That is, since the amount of dew condensation water that is retained by L4 and L5 is determined, the amount that can be evaporated in, for example, several hours is determined in consideration of the area where the indoor unit 100 is installed, and is larger than that amount. L4 and L5 are determined so as to be volume. L4 is about 30 mm, for example, and L5 is about several mm, for example.
　また、前後方向流路４０に形成された凸部４３について、前記の境界部４５と前後方向で同じ位置となる境界部４６を境に、その高さ（前記の図７を参照しながら説明した長さＬ３）が傾斜の下る方向に向かって徐々に低くなる。ただし、凸部４３の傾斜の変化（即ち、図７における直線の傾き）は、凹部４４の傾斜の変化（即ち、図７における直線の傾き）よりも大きい。そのため、前後方向流路４０に形成された傾斜の途中で凸部４３が無くなることになる。 Further, the height of the convex portion 43 formed in the front-rear direction channel 40 is described with reference to the boundary portion 46 that is the same position in the front-rear direction as the boundary portion 45 (see FIG. 7 above). The length L3) gradually decreases in the direction of decreasing slope. However, the change in the slope of the convex portion 43 (that is, the slope of the straight line in FIG. 7) is larger than the change in the slope of the concave portion 44 (that is, the slope of the straight line in FIG. 7). For this reason, the convex portion 43 disappears in the middle of the inclination formed in the front-rear direction flow path 40.
　このことを言い換えれば、排水口４２の近傍では、凸部４３は形成されていない（図６を併せて参照）。これにより、凸部４３に沿って凹部４４を流れてきた結露水が、排水口４２に集まり易くなる。そのため、結露水が前後方向流路４０の背面側に溜まることが抑制され、排水口４２を通じて室外に排水され易くなる。 In other words, the convex portion 43 is not formed in the vicinity of the drain port 42 (see also FIG. 6). Thereby, the dew condensation water that has flowed through the concave portion 44 along the convex portion 43 is easily collected at the drain port 42. Therefore, it is suppressed that dew condensation water accumulates on the back side of the front-rear direction flow path 40, and is easily drained outside through the drain port 42.
　以上の構成を有するドレンパン２では、前記のように、結露水が流れ易いように構成されている。そのため、室内熱交換器３から瞬間的に多量の結露水が流れ落ちたとしても、速やかに排水口４２を通じてドレンパン２から室外に排水される。この結果、ドレンパン２から結露水が溢れることが防止される。 As described above, the drain pan 2 having the above-described configuration is configured such that condensed water flows easily. Therefore, even if a large amount of dew condensation water instantaneously flows down from the indoor heat exchanger 3, it is quickly drained from the drain pan 2 to the outside through the drain port 42. As a result, it is possible to prevent the condensed water from overflowing from the drain pan 2.
　また、結露水が排水され易い結果、ドレンパン２の表面に付着した塵埃も洗い流され易くなる。この結果、ドレンパン２の表面に塵埃が堆積し難くなり、ドレンパン２の内容積が長期間に亘って十分に確保される。そのため、このような作用によっても、瞬間的に多量の結露水が流れ込んだ場合に、ドレンパン２から結露水が溢れることが防止される。 Also, as a result of the dew condensation water being easily drained, the dust adhering to the surface of the drain pan 2 is easily washed away. As a result, it is difficult for dust to accumulate on the surface of the drain pan 2, and the internal volume of the drain pan 2 is sufficiently ensured over a long period of time. Therefore, even with such an action, when a large amount of condensed water flows instantaneously, the condensed water is prevented from overflowing from the drain pan 2.
　さらに、室内熱交換器３での結露水は、正面側において左右方向に延在する断熱材３１に初めに流れ落ちることになる。そうすると、特に洗浄の低温の結露水が断熱材３１に流れ落ちることになる。しかし、断熱材３１により、低温の冷却水によって前ドレンパン３５が冷却されることが防止され、前ドレンパン３５の裏面側（通風路側）での結露が防止される。これにより、室内への水の飛散が防止される。 Furthermore, the dew condensation water in the indoor heat exchanger 3 first flows down to the heat insulating material 31 extending in the left-right direction on the front side. If it does so, especially the low-temperature dew condensation water of washing | cleaning will flow down to the heat insulating material 31. FIG. However, the heat insulating material 31 prevents the front drain pan 35 from being cooled by the low-temperature cooling water, and prevents condensation on the back side (ventilation path side) of the front drain pan 35. Thereby, scattering of water into the room is prevented.
　また、前後方向流路４０には、断熱材３１の上を流れた結露水が流れる。そのため、断熱材３１を流れるうちに結露水は室温によって温められ、この結果、前後方向流路４０には、断熱材３１に流れ落ちた直後の結露水の温度よりは高い温度の結露水が流れる。そのため、前後方向流路４０に断熱材を配置しなくても、前後方向流路４０の裏面側での結露が防止される。 Moreover, the dew condensation water that has flowed over the heat insulating material 31 flows in the front-rear direction flow path 40. Therefore, the dew condensation water is warmed at room temperature while flowing through the heat insulating material 31, and as a result, the dew condensation water having a temperature higher than the temperature of the dew condensation water immediately after flowing down the heat insulating material 31 flows in the front-rear direction flow path 40. Therefore, dew condensation on the back side of the front-rear channel 40 can be prevented without arranging a heat insulating material in the front-rear channel 40.
　以上、本発明を具体的な実施形態を挙げながら説明したが、本発明は前記の実施形態に何ら限定されず、本発明の要旨を逸脱しない範囲内で任意に変更して実施することができる。 The present invention has been described above with reference to specific embodiments. However, the present invention is not limited to the above-described embodiments, and can be arbitrarily modified and implemented without departing from the gist of the present invention. .
　例えば、前記の例では、断熱材３１に形成された凸部３２及び凹部３３，３４の幅（前後方向の長さ）は、左右方向の全域で同じとしたが、例えば、前後方向流路４０に向かって徐々に広くなったり（長くなったり）、又は、徐々に狭くなったり（短くなったり）してもよい。例えば、凹部３３，３４の幅が前後方向流路４０に向かって徐々に広くなるようにすることで、塵埃が集まり易い断熱材３１の左右端部において、塵埃のつまりが確実に防止される。一方で、例えば、凹部３３，３４の幅が前後方向流路４０に向かって徐々に広くなるようにすることで、断熱材３１の左右端部において結露水の流速を速めることができ、断熱材３１に存在する結露水がさらに速やかに前後方向流路４０に流れ込ませることができる。 For example, in the above-described example, the width (length in the front-rear direction) of the convex portion 32 and the concave portions 33 and 34 formed on the heat insulating material 31 is the same in the entire region in the left-right direction. It may gradually become wider (becomes longer) or may become gradually narrower (becomes shorter). For example, by making the widths of the recesses 33 and 34 gradually widen toward the front-rear direction flow path 40, the clogging of dust is reliably prevented at the left and right end portions of the heat insulating material 31 where dust tends to collect. On the other hand, for example, by allowing the widths of the recesses 33 and 34 to gradually become wider toward the front-rear direction flow path 40, the flow rate of the condensed water can be increased at the left and right end portions of the heat insulating material 31. The dew condensation water existing in 31 can flow into the front-rear direction flow path 40 more quickly.
　また、例えば、断熱材３１の表面に形成される凹凸の数及び形状は図示の例に限定されるものではなく、排水口４２に結露水を導くことができるように形成されたものであれば、どのような形状であってもよい。具体的には、例えば凸部３２は断面矩形状（図５参照）とする必要は無く、角が面取りされたような断面略矩形状としてもよい。また、矩形状以外のその他の形状としてもよい。さらに、断熱材３１に形成される例えば凸部３２の数も、図示のような、左右方向に一つのみ（図４参照）とする必要は無く、例えば二つ以上とすることができる。そして、凸部３２の数及び形状に対応して、凹部３３，３４を形成すればよい。 Further, for example, the number and shape of the irregularities formed on the surface of the heat insulating material 31 are not limited to the example shown in the figure, and may be those formed so that the condensed water can be guided to the drain port 42. Any shape is acceptable. Specifically, for example, the protrusion 32 does not need to have a rectangular cross section (see FIG. 5), and may have a substantially rectangular cross section with chamfered corners. Moreover, it is good also as other shapes other than rectangular shape. Further, the number of the convex portions 32 formed on the heat insulating material 31, for example, does not need to be only one in the left-right direction (see FIG. 4) as illustrated, and may be two or more, for example. And what is necessary is just to form the recessed parts 33 and 34 corresponding to the number and shape of the convex part 32. FIG.
　さらに、例えば、前後方向流路４０に形成された凹凸の数及び形状も図示の例に限定されず、排水口４２に結露水を導くことができるように形成されたものであれば、どのような形状であってもよい。具体的には、例えば凸部４３は、角部が面取りされたような略矩形状（図７参照）とする必要は無く、角部が面取りされていない矩形状としてもよい。また、矩形状以外のその他の形状としてもよい。さらに、凸部４３の数も、図示のような、前後方向に四つ（図７参照）とする必要は無く、例えば三つ以下、又は、五つ以上とすることができる。そして、凸部４３の数及び形状に対応して、凹部４４を形成すればよい。 Furthermore, for example, the number and shape of the irregularities formed in the front-rear direction flow path 40 are not limited to the example shown in the drawing, and any form may be used as long as it is formed so that condensed water can be guided to the drain port 42. It may be a simple shape. Specifically, for example, the convex portion 43 does not need to have a substantially rectangular shape (see FIG. 7) in which corner portions are chamfered, and may have a rectangular shape in which corner portions are not chamfered. Moreover, it is good also as other shapes other than rectangular shape. Furthermore, the number of the convex parts 43 does not need to be four in the front-rear direction as shown in the figure (see FIG. 7), and can be three or less, or five or more, for example. And what is necessary is just to form the recessed part 44 corresponding to the number and shape of the convex part 43. FIG.
　また、室内熱交換器３の洗浄に際して、前記の例では室内熱交換器３をいったん凍結させた後解凍させることで結露水を発生させているが、凍結させることなく液体の結露水をそのまま発生させるようにしてもよい。即ち、冷房運転時及び除湿運転時に通流させる冷媒の蒸発温度よりも低い蒸発温度の冷媒であれば、凍結させなくても、冷房運転時及び除湿運転時に生じる結露水の量よりも多量の結露水を発生させて、洗浄することができる。 In the above example, when the indoor heat exchanger 3 is washed, condensed water is generated by freezing the indoor heat exchanger 3 and then thawing it, but liquid condensed water is generated as it is without freezing. You may make it make it. That is, if the refrigerant has an evaporation temperature lower than the evaporation temperature of the refrigerant that is passed during cooling operation and dehumidification operation, a larger amount of condensation than the amount of condensed water generated during cooling operation and dehumidification operation can be obtained without freezing. Water can be generated and washed.
　さらに、室内熱交換器３の洗浄に際して、前記の例では、室内熱交換器３に発生した霜は、室内熱交換器３の加熱により解凍されていた。また、室内熱交換器３に発生した霜の解凍は、暖房運転時の冷媒に代えて、例えば冷房運転時又は除湿運転時の冷媒（凍結しない蒸発温度の冷媒）を通流させることで、行ってもよい。さらには、冷媒を通流させずに、自然解凍させてもよい。なお、解凍の際には、必要に応じて、貫流ファン４を回転駆動させて、解凍を促してもよい。 Furthermore, when the indoor heat exchanger 3 was washed, in the above example, the frost generated in the indoor heat exchanger 3 was thawed by heating the indoor heat exchanger 3. In addition, the frost generated in the indoor heat exchanger 3 is thawed by passing a refrigerant (a refrigerant having an evaporating temperature that is not frozen) during cooling operation or dehumidifying operation, for example, instead of the refrigerant during heating operation. May be. Furthermore, natural thawing may be performed without flowing the refrigerant. At the time of thawing, the cross-flow fan 4 may be rotationally driven as necessary to promote thawing.
　また、例えば、前記の図３を参照しながら説明したステップＳ４において、室内熱交換器３の乾燥を促すため、貫流ファン４による発生した空気の流れを室内熱交換器３に向かわせる部材、通風路等を設けるようにしてもよい。 In addition, for example, in step S4 described with reference to FIG. 3 above, in order to promote the drying of the indoor heat exchanger 3, a member for directing the flow of air generated by the cross-flow fan 4 toward the indoor heat exchanger 3, ventilation A road or the like may be provided.
　さらに、例えば、前記の例では、前ドレンパン３５の上に断熱材３１が配置されているが、断熱材３１が表面（内面）に配置されることが好ましいものの、断熱材３１は必須ではない。断熱材３１が使用されない場合、断熱材３１に形成されていた凸部３２は前ドレンパン３５の内表面に直接形成されることになる。また、断熱材３１は、前ドレンパン３５の裏面（外面）に配置されるようにしてもよい。 Further, for example, in the above example, the heat insulating material 31 is disposed on the front drain pan 35. However, although the heat insulating material 31 is preferably disposed on the surface (inner surface), the heat insulating material 31 is not essential. When the heat insulating material 31 is not used, the convex portion 32 formed on the heat insulating material 31 is directly formed on the inner surface of the front drain pan 35. Further, the heat insulating material 31 may be disposed on the back surface (outer surface) of the front drain pan 35.
　また、例えば、前後方向流路４０の表面に断熱材を配置していないことについて、前記の例が好ましいものの、例えば前後方向流路４０の表面（内面）又は裏面（外面）に断熱材を配置するようにしてもよい。これにより、前後方向流路４０の裏面での結露の発生がより確実に防止される。前後方向流路４０の表面（内面）に断熱材が設けられる場合、その断熱材の表面に凸部４３及び凹部４４が形成されることが好ましい。 In addition, for example, with respect to the fact that the heat insulating material is not disposed on the surface of the front-rear flow path 40, the above example is preferable, but for example, the heat insulating material is disposed on the front surface (inner surface) or the back surface (outer surface) of the front-rear flow channel 40 You may make it do. Thereby, generation | occurrence | production of the dew condensation by the back surface of the front-back direction flow path 40 is prevented more reliably. When a heat insulating material is provided on the surface (inner surface) of the front-rear direction flow path 40, it is preferable that the convex portion 43 and the concave portion 44 are formed on the surface of the heat insulating material.
　さらに、例えば、前記の例では、断熱材３１の厚さは左右方向で一定としたが、左右方向で中央近傍を境にして、前後方向流路４０に向かう方向に下る傾斜を有していてもよい。 Further, for example, in the above-described example, the thickness of the heat insulating material 31 is constant in the left-right direction, but has a slope that goes down in the direction toward the front-rear direction flow path 40 with the vicinity of the center in the left-right direction as a boundary. Also good.
　また、例えば、前記の例では、放電装置８により、マイナスに荷電された水分が筐体９の内部で発生するようにしたが、放電装置８によって空気中に放電させてオゾンを発生させ、筐体９の内部にオゾンガスを発生させるようにしてもよい。また、放電装置８により、前記のマイナスに荷電された水分とオゾンガスとの双方を発生させて、これらを筐体９の内部に放出するようにしてもよい。 Further, for example, in the above example, negatively charged moisture is generated inside the housing 9 by the discharge device 8, but ozone is generated by discharging the air into the air by the discharge device 8. Ozone gas may be generated inside the body 9. Alternatively, both the negatively charged moisture and ozone gas may be generated by the discharge device 8 and released into the housing 9.
　さらに、例えば、放電装置８の放電は、前記の例では空調中に行うようにしたが、これに代えて、空調停止中に行うようにしてもよい。さらには、前記の例のように空調中に行うとともに、空調停止中にも行うようにしてもよい。空調停止中に行う放電は、例えば、一定時間毎に断続的に行ってもよいし、連続的に行うこともできる。 Further, for example, the discharge of the discharge device 8 is performed during the air conditioning in the above example, but instead, it may be performed while the air conditioning is stopped. Furthermore, it may be performed while the air conditioning is stopped as well as during the air conditioning as in the above example. The discharge performed while the air conditioning is stopped may be performed intermittently at regular intervals, for example, or may be performed continuously.
　１　　室内機制御部（制御部）
　２　　ドレンパン
　３　　室内熱交換器
　３ａ　　フィン
　３ｂ　　伝熱管
　４　　貫流ファン
　８　　放電装置
　１０　　空気調和機
　１６　　室外機制御部（制御部）
　３１　　断熱材（ドレンパン、左右方向流路）
　３２　　凸部（ドレンパン、左右方向流路）
　３３　　凹部（ドレンパン、左右方向流路）
　３４　　凹部（ドレンパン、左右方向流路）
　３５　　前ドレンパン（ドレンパン、左右方向流路）
　４０　　前後方向流路（ドレンパン）
　４２　　排水口（ドレンパン）
　４３　　凸部（ドレンパン）
　４４　　凹部（ドレンパン）
　１００　　室内機
　１０１　　室外機 1 Indoor unit control unit (control unit)
2 Drain pan 3 Indoor heat exchanger 3a Fin 3b Heat transfer tube 4 Cross-flow fan 8 Discharge device 10 Air conditioner 16 Outdoor unit control unit (control unit)
31 Heat insulation material (drain pan, left and right channel)
32 Convex (drain pan, left and right channel)
33 Concave portion (drain pan, left and right channel)
34 Recessed part (drain pan, left and right channel)
35 Front drain pan (drain pan, left and right channel)
40 Front-rear channel (drain pan)
42 Drain port
43 Convex part (drain pan)
44 Concave part (drain pan)
100 indoor unit 101 outdoor unit

Claims (14)

  1. 　貫流ファンと、
    　室内熱交換器と、
    　当該室内熱交換器の下方に配置されて前記室内熱交換器において発生した結露水を表面に受け、受けた結露水を室外に排水する排水口が形成されているとともに、凹凸を表面に有するドレンパンと、
    　前記室内熱交換器に対し、冷房運転時及び除湿運転時に通流する冷媒の蒸発温度よりも低い蒸発温度の冷媒を通流させる制御部と、を備える室内機を有することを特徴とする、空気調和機。     With once-through fans,
    An indoor heat exchanger,
    A drain pan which is disposed below the indoor heat exchanger and receives condensate water generated in the indoor heat exchanger on the surface, and has a drainage port for draining the received dew condensation water to the outside, and has irregularities on the surface. When,
    An air conditioner comprising: an indoor unit comprising: a control unit that causes a refrigerant having an evaporation temperature lower than an evaporation temperature of a refrigerant that flows during cooling operation and dehumidifying operation to the indoor heat exchanger. Harmony machine.
  2. 　前記ドレンパンは、前記室内機の正面視で左右方向に延在する左右方向流路と、当該左右方向流路の左右両端にそれぞれに接続され、前記室内機の正面から背面に向かって延在する前後方向流路とを備えて構成されることを特徴とする、請求項１に記載の空気調和機。 The drain pan is connected to the left and right flow paths extending in the left-right direction in the front view of the indoor unit, and to the left and right ends of the left-right flow path, and extends from the front to the back of the indoor unit. The air conditioner according to claim 1, comprising an anteroposterior channel.
  3. 　前記凹凸は、前記左右方向流路の内部に、前記室内機の正面視で左右方向に延在していることを特徴とする、請求項２に記載の空気調和機。 The air conditioner according to claim 2, wherein the unevenness extends in the left-right direction in the left-right direction flow path in a front view of the indoor unit.
  4. 　前記ドレンパンは、前記左右方向流路の表面に断熱材を備える一方で、前記前後方向流路の表面には断熱材を備えないことを特徴とする、請求項２又は３に記載の空気調和機。 4. The air conditioner according to claim 2, wherein the drain pan is provided with a heat insulating material on a surface of the left-right direction flow path, but does not include a heat insulating material on a surface of the front-rear direction flow path. .
  5. 　前記左右方向流路の表面に備えられた断熱材は、前記室内熱交換器において発生した結露水を受ける部分に配置され、
    　前記凹凸は当該断熱材の表面に形成されていることを特徴とする、請求項４に記載の空気調和機。     The heat insulating material provided on the surface of the left-right flow path is disposed in a portion that receives the condensed water generated in the indoor heat exchanger,
    The air conditioner according to claim 4, wherein the unevenness is formed on a surface of the heat insulating material.
  6. 　前記前後方向流路の背面側には、前記排水口が形成されていることを特徴とする、請求項２又は３に記載の空気調和機。 The air conditioner according to claim 2 or 3, wherein the drain outlet is formed on a back side of the front-rear direction flow path.
  7. 　前記前後方向流路の底面には、前記排水口の近傍において、前記排水口に向かって下る傾斜が形成されていることを特徴とする、請求項２又は３に記載の空気調和機。 The air conditioner according to claim 2 or 3, wherein an inclined surface is formed on the bottom surface of the front-rear direction flow path so as to descend toward the drain port in the vicinity of the drain port.
  8. 　前記前後方向流路には凸部が形成され、
    　当該凸部は、前記傾斜の途中で無くなるように前記傾斜の下る方向に徐々に高さが低くなっていることを特徴とする、請求項７に記載の空気調和機。     A convex portion is formed in the front-rear direction flow path,
    The air conditioner according to claim 7, wherein the height of the convex portion is gradually lowered in a direction of descending the slope so as to disappear in the middle of the slope.
  9. 　前記室内熱交換器を構成するフィンと前記ドレンパンとは接触しており、
    　前記ドレンパンを構成する凹凸のうちの凹んだ部分の内側に前記フィンの先端が接触していることを特徴とする、請求項１乃至３の何れか１項に記載の空気調和機。     The fins constituting the indoor heat exchanger and the drain pan are in contact with each other,
    The air conditioner according to any one of claims 1 to 3, wherein a tip of the fin is in contact with a concave portion of the unevenness constituting the drain pan.
  10. 　前記ドレンパンのうち、前記結露水が流れる部分には撥水性の表面が配置されていることを特徴とする、請求項１乃至３の何れか１項に記載の空気調和機。 The air conditioner according to any one of claims 1 to 3, wherein a water-repellent surface is disposed in a portion of the drain pan through which the condensed water flows.
  11. 　前記制御部は、冷房運転時及び除湿運転時に通流する冷媒の蒸発温度よりも低い蒸発温度であって、かつ、前記室内熱交換器の表面に霜を発生させる蒸発温度の冷媒を前記室内熱交換器に通流させて、前記室内熱交換器の表面に霜を発生させ、
    　前記室内熱交換器の表面に霜を発生させた後に、発生した霜を解凍することで液体の水を発生させて、結露水として前記ドレンパンに流すことを特徴とする、請求項１乃至３の何れか１項に記載の空気調和機。     The control unit converts a refrigerant having an evaporation temperature lower than an evaporation temperature of a refrigerant flowing during a cooling operation and a dehumidifying operation and having an evaporation temperature that generates frost on the surface of the indoor heat exchanger into the indoor heat. Flowing through the exchanger, generating frost on the surface of the indoor heat exchanger,
    The frost is generated on the surface of the indoor heat exchanger, and then the liquid frost is generated by thawing the generated frost, and flows into the drain pan as condensed water. The air conditioner of any one of Claims.
  12. 　前記室内機は、オゾンガス、及び、マイナスに荷電された水分のうちの少なくとも一方を発生させる放電装置を備えることを特徴とする、請求項１乃至３の何れか１項に記載の空気調和機。 The air conditioner according to any one of claims 1 to 3, wherein the indoor unit includes a discharge device that generates at least one of ozone gas and negatively charged moisture.
  13. 　前記室内機は、前記ドレンパンに紫外線を照射する紫外線照射装置を備えることを特徴とする、請求項１乃至３の何れか１項に記載の空気調和機。 The air conditioner according to any one of claims 1 to 3, wherein the indoor unit includes an ultraviolet irradiation device that irradiates the drain pan with ultraviolet rays.
  14. 　前記ドレンパンには抗菌剤が含まれていることを特徴とする、請求項１乃至３の何れか１項に記載の空気調和機。 The air conditioner according to any one of claims 1 to 3, wherein the drain pan contains an antibacterial agent.
PCT/JP2017/035926 2017-04-28 2017-10-03 Air conditioner WO2018198398A1 (en)

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