WO2018198398A1 - 空気調和機 - Google Patents

空気調和機 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
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English (en)
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/zh
Publication of WO2018198398A1 publication Critical patent/WO2018198398A1/ja

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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)
PCT/JP2017/035926 2017-04-28 2017-10-03 空気調和機 WO2018198398A1 (ja)

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JP2017089731A JP6349011B1 (ja) 2017-04-28 2017-04-28 空気調和機
JP2017-089731 2017-04-28

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JP7421064B2 (ja) * 2019-09-30 2024-01-24 ダイキン工業株式会社 空気調和機
CN215982864U (zh) * 2021-09-30 2022-03-08 广东美的暖通设备有限公司 空调室内机和空调

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JPH07172152A (ja) * 1993-05-19 1995-07-11 Nippondenso Co Ltd 空気調和装置のクーリングユニットおよび排水ケース
JP2002277044A (ja) * 2001-03-19 2002-09-25 Mitsubishi Heavy Ind Ltd 床置型空気調和装置
JP2003279190A (ja) * 2002-03-19 2003-10-02 Kitakyushu Foundation For The Advancement Of Industry Science & Technology 気体の除湿装置及び除湿方法
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TW201839328A (zh) 2018-11-01
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JP6349011B1 (ja) 2018-06-27
CN110392808A (zh) 2019-10-29
CN110392808B (zh) 2021-06-11

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