WO2014175109A1 - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
WO2014175109A1
WO2014175109A1 PCT/JP2014/060664 JP2014060664W WO2014175109A1 WO 2014175109 A1 WO2014175109 A1 WO 2014175109A1 JP 2014060664 W JP2014060664 W JP 2014060664W WO 2014175109 A1 WO2014175109 A1 WO 2014175109A1
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WO
WIPO (PCT)
Prior art keywords
indoor
air conditioner
indoor unit
drain
indoor units
Prior art date
Application number
PCT/JP2014/060664
Other languages
French (fr)
Japanese (ja)
Inventor
中村　芳郎
尚宣 日野
克明 矢部
哲也 毛利
浩 高西
直樹 相澤
池田　昌弘
柴田　克彦
正憲 井上
博之 森本
Original Assignee
東芝キヤリア株式会社
株式会社 関電エネルギーソリューション
株式会社東芝
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 東芝キヤリア株式会社, 株式会社 関電エネルギーソリューション, 株式会社東芝 filed Critical 東芝キヤリア株式会社
Publication of WO2014175109A1 publication Critical patent/WO2014175109A1/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
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/26—Refrigerant piping
    • F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
    • 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
    • F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/20—Cooling means

Definitions

  • Embodiments of the present invention relate to an air conditioner.
  • data centers and server rooms contain information processing devices such as communication devices for constructing servers and networks having various functions.
  • Patent Document 1 As this type of conventional air conditioning system, for example, an air conditioning system described in Patent Document 1 is known.
  • the cooling unit which is an indoor unit, includes a plurality of dry coil units.
  • Each dry coil unit is provided with a heat exchanger, and a refrigerant supply port and a refrigerant discharge port of the heat exchanger are provided so as to protrude from the side surface of the dry coil unit.
  • the problem to be solved by the present invention is to provide an air conditioner that saves space for installing an indoor unit.
  • the problem to be solved by the present invention is an air conditioner having a plurality of indoor units each having a machine room and at least one outdoor unit, wherein the plurality of indoor units are stacked in a vertical direction to form a plurality of stages.
  • the indoor units arranged in such a manner that each machine room of these indoor units communicates with each other in the vertical direction, and pipe connection end portions of the indoor units connected to the pipes of the outdoor units are stacked on the plurality of stages.
  • This is achieved by providing an air conditioner characterized by being provided at the upper part of the indoor unit located at the uppermost stage.
  • the said air conditioner can take the following suitable embodiment.
  • Each of the indoor units includes a ventilation path communicating with an air inlet and an air outlet provided in the indoor unit, and a heat exchanger and a fan for blowing air to the heat exchanger are provided in the ventilation path. It is desirable that the exchangers are connected in parallel by piping in the machine room.
  • each indoor unit preferably includes a first drain pan that receives drain from the heat exchanger.
  • a top plate may be provided at the upper end of the uppermost indoor unit, and a rope guide for hooking a transportation rope to the top plate may be formed.
  • a panel for closing the air suction port can be attached.
  • a plurality of indoor units 2 and 3 are stacked in the vertical direction to form a plurality of stages, so that these indoor units are installed rather than side by side. Space can be saved. The installation space can be effectively used, and connection with other related arrangement devices can be effectively performed. Further features of the present invention and effects thereof will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings.
  • FIG. 3 The front view by the side of the air blower outlet of the indoor unit apparatus of the air conditioner shown in FIG. 3 is a sectional view taken along line III-III in FIG. 2.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. 2.
  • the perspective view seen from the air blower outlet side of the indoor unit apparatus shown in FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 4.
  • the schematic diagram which shows the positional relationship of the 1st, 2nd drain pan, inclination board, etc. which are shown by FIG. FIG.
  • FIG. 4 is a schematic diagram mainly showing a positional relationship between first to third drain pans.
  • the plane sectional view of the indoor unit which shows the modification of the inner duct shown in FIG. The front view of the indoor unit which shows the modification of the indoor fan shown in FIG.
  • the schematic diagram which shows the modification of the air conditioner shown in FIG. The schematic diagram which shows the other modification of the air conditioner shown in FIG.
  • FIG. 1 is a schematic diagram showing an overall configuration of an air conditioner according to an embodiment, and a free cooling system (FC) is not shown.
  • the air conditioner 1 according to this embodiment is configured such that a refrigerant heat exchanger (indoor heat exchanger) of a refrigeration cycle in which refrigerant such as R410A circulates and a water heat exchanger of a free cooling system (FC) can be provided. Has been.
  • the air conditioner 1 includes a plurality of units of the same shape and size, for example, two indoor units 2 and 3, and one or more units, for example, two outdoor units 4 and 5. It has.
  • the cooling rated (maximum) capacity of each of the indoor units 2 and 3 is 10 horsepower (28 kW), and the entire air conditioner 1 is 20 horsepower (56 kW).
  • These two indoor units 2 and 3 are stacked in a plurality of stages in the vertical direction and fixed to each other to constitute one indoor unit device 6.
  • Each of the indoor units 2 and 3 has a cubic frame structure (frame structure) 7 and 8 as will be described later, and a top plate 39 which will be described later is provided at the upper end of the upper body 7 of the upper indoor unit 2.
  • ventilation chambers 2a and 3a for accommodating indoor heat exchangers 9 and 10, indoor fans 11 and 12 and machine chambers 2b and 3b for accommodating refrigerant piping 13 and the like. Is forming.
  • the machine rooms 2b and 3b are formed so that a pair of upper and lower indoor units 2 and 3 can communicate with each other in the vertical direction.
  • the refrigerant pipe 13 includes a liquid side refrigerant pipe 13a connected to each indoor heat exchanger 9, 10, and a gas side refrigerant pipe 13b.
  • the liquid-side refrigerant pipe 13a are connected to the refrigerant inlet of the branch pipe 13a 1, 13a 2 of the upper and lower through the indoor heat exchanger 9 and 10 for branching the tip 2 crotch.
  • Each of the bifurcated branch pipes 13a 1 and 13a 2 is provided with expansion valves 15 and 16 in the middle thereof.
  • the expansion valves 15 and 16 are electronic expansion valves whose opening degrees can be adjusted.
  • the gas-side refrigerant pipe 13b is also connected to the refrigerant outlets of the pair of upper and lower indoor heat exchangers 9 and 10 via branch pipes 13b 1 and 13b 2 that branch the tip part into two branches. That is, the upper and lower indoor heat exchangers 9 and 10 are connected in parallel.
  • liquid side and gas side refrigerant pipes 13a and 13b extend the upper end portion in FIG. 1 upward and outward from the upper end through hole 14 of the top plate 39 of the uppermost indoor unit 2, respectively.
  • Liquid side and gas side pipe connection ends 17 and 18 are formed at the ends, respectively.
  • the liquid-side and gas-side pipe connection ends 17 and 18 do not have to be provided on the upper end of the upper indoor unit 2, and the upper side is close to the upper end where a worker who performs the pipe connection work can reach. It may be inside the machine room 2b of the indoor unit 2.
  • the liquid side pipe connection end portion 17 is connected to the liquid side refrigerant connection pipe 19 connected to each liquid side pipe connection portion of at least one, for example, two refrigerant outdoor units 4 and 5.
  • gas side refrigerant connection pipes 20 connected to the gas side pipe connection portions of the refrigerant outdoor units 4 and 5 are connected to the gas side pipe connection end portions 18 on the indoor units 2 and 3 side. That is, the two refrigerant outdoor units 4, 5 are also connected in parallel.
  • Each outdoor unit 4, 5 is provided with at least a compressor, an outdoor heat exchanger, an outdoor fan, etc. (not shown) in its housing, and the indoor heat exchangers 9, 10 of each indoor unit 2, 3, Are connected in many ways.
  • the indoor unit device 6 is configured such that the casings 7 and 8 of the indoor units 2 and 3 are formed into a rectangular parallelepiped frame structure (frame structure) using, for example, a C-shaped or L-shaped steel.
  • an air suction port 21 is formed on the back surface (upper end in FIG. 3) side of the housings 7 and 8, and an air outlet 22 is formed on the front surface (lower end in FIG. 3) side.
  • the suction port 21 is formed so that the back sides of the indoor units 2 and 3 are opened almost entirely, and almost the entire back surfaces of the water heat exchangers 26 and 27 are exposed.
  • the air outlet 22 is formed in, for example, a square shape by opening almost the entire front surface of the indoor units 2 and 3.
  • a metal strip-shaped reinforcing plate 23 is fixed over almost the entire circumference of each side (four sides) of the outer periphery of the joint between the pair of upper and lower housings 7 and 8. Improvement of fixing strength is achieved.
  • the casings 7 and 8 are provided with inner ducts (ventilation passages) 24 and 25 having a substantially rectangular tube straight body shape made of sheet metal or the like in the ventilation chambers 2a and 3a.
  • Each of the inner ducts 24 and 25 is provided with the indoor heat exchangers 9 and 10 on the inlet 21 side, and the indoor fans 11 and 12 are provided on the outlet 22 side of the inner ducts 24 and 25, respectively.
  • the suction port 21 and the air outlet 22 are opposed to each other and communicated with each other.
  • the inner ducts 24 and 25 are each comprised so that the water heat exchangers 26 and 27 of a free cooling system can be additionally provided between the indoor heat exchangers 9 and 10 and the suction inlet 21 side. Yes.
  • a pair of upper and lower water heat exchangers 26 and 27 are connected to each other by a water pipe (not shown) and the water outlets are connected to each other by an inlet side and an outlet side water pipe (not shown).
  • the heat exchangers 26 and 27 are connected in parallel.
  • These inlet and outlet water pipes extend upward from the machine room 2b, and as shown in FIGS. 5 and 7, the inlet side, as well as the liquid side of the refrigerant pipe and the gas side pipe connection ends 17 and 18, Outlet pipe connection end portions 50 and 51 are formed.
  • the inlet side and outlet side pipe connection ends 50 and 51 of these water pipes are connected to a water cooler such as a cooling tower via a connection water pipe (not shown).
  • At least one cooling tower may be used, but in the case of a plurality of units, for example, two units, they are connected in parallel by a connecting water pipe (not shown) as in the case of the outdoor units 4 and 5.
  • the flow rate of the cooling water passing through the water heat exchangers 26 and 27 is controlled by the opening degree of the electric two-way valve interposed in the middle of the water pipe and the rotational speed of the water circulation pump (both not shown).
  • capacitance of the water heat exchangers 26 and 27 is set so that the free cooling system can output the capacity
  • the inner ducts 24 and 25 are substantially rectangular tube-shaped ducts, and air flow paths connecting the water heat exchangers 26 and 27, the indoor heat exchangers 9 and 10 and the indoor fans 11 and 12 are provided. These heat exchangers 9 and 10 and the water heat exchangers 26 and 27 are formed in an air flow path (ventilation path) having substantially the same cross section as the lateral width.
  • the indoor fans 11 and 12 are configured by, for example, providing a motor such as a direct current fan motor integrally with a fan such as a propeller fan or a turbo fan. As shown in FIGS. 2 to 5, in this embodiment, a turbo fan is employed as the fan.
  • the indoor fans 11 and 12 include a fan guard (not shown) that covers the outer surface of the fan, and a protective cover that covers and protects the outer surface of the fan motor is provided on the outer surface of the center of the fan guard.
  • the indoor fans 11 and 12 are attached to attachment plates 24a and 25b provided in the inner ducts 24 and 25, respectively.
  • the inner ducts 24, 25 are partitioned by the mounting plates 24 a, 25 b into a primary side (indoor heat exchanger side) and a secondary side (outlet 22 side) of the indoor fans 11, 12.
  • the flow path cross section is formed in a substantially square shape.
  • the longitudinal dimension of the inner ducts 24 and 25 is provided with an inclined plate 34 (FIG. 8) to be described later on the lower surface of the primary duct.
  • the primary side is smaller than the secondary side.
  • the longitudinal dimension Lh and the width dimension Lw of the secondary side flow passage cross section (blower port 22) of the inner ducts 24 and 25 are each 1000 mm, and the turbo fan diameter D1 of the indoor fans 11 and 12 is 500 mm. It is said. It is most preferable in terms of air blowing efficiency that the secondary side channel shape is square and the diameter D1 of the turbofan is approximately 1 ⁇ 2 of the channel cross-sectional dimensions (Lh, Lw).
  • FIG. 11 shows the indoor unit device 6 in which a propeller fan is adopted as the fan of the indoor fans 11 and 12.
  • the secondary side channel cross-sectional dimensions Lh and Lw of the inner ducts 24 and 25 are the same at 1000 mm
  • the diameter D2 of the propeller fan is set to 630 mm.
  • the diameter D2 of a propeller fan shall be about 3/5 of flow-path cross-sectional dimension (Lh, Lw).
  • the machine chambers 2b and 3b are formed between one side surface of the inner ducts 24 and 25 and the outer side surface (right side surface in FIG. 3) of the indoor units 2 and 3. .
  • the machine chambers 2b and 3b are formed so as to communicate in the vertical direction of the pair of upper and lower indoor units 2 and 3, and the main control shown in FIG.
  • the board 28, the sub control board 29, the expansion valves 15 and 16 interposed in the refrigerant pipe 13, and the like are accommodated.
  • the expansion valves 15 and 16 are disposed on the back side of the indoor units 2 and 3 or in the vicinity thereof, and can be easily accessed and maintained from the back side.
  • the main control board 28 shown in FIG. 5 is a control device that integrally controls the operation of the two indoor units 2 and 3, and is disposed, for example, in the machine room 2 b of the upper indoor unit 2.
  • the sub-control board 29 is a control device that is disposed in each of the machine chambers 2b and 3b of the indoor units 2 and 3 and controls the opening degree of the expansion valves 15 and 16 according to a command from the control device of the outdoor unit. is there.
  • the casing 8 of the lower indoor unit 3 is provided with a pair of right and left prism bases 30a and 30b having a predetermined height (thickness) on the outer surfaces of the bottom left and right ends thereof.
  • the indoor unit device 6 is installed and fixed on a required installation surface via 30b, and a required gap is formed between this installation surface and the outer bottom surface of the lower indoor unit 3.
  • the indoor units 2 and 3 are located below the indoor heat exchangers 9 and 10 and the water heat exchangers 26 and 27 and below the inner ducts 24 and 25, respectively.
  • a first drain pan 31 that receives drain generated in the indoor and water heat exchangers 9, 10, 26, and 27 is provided.
  • the first drain pan 31 is provided with a water receiving port 32 communicating with the downstream side of the air flow from the indoor heat exchangers 9 and 10 on the upper surface in FIG. 8, while a drain port 33 is provided below the first drain pan 31.
  • the drain port 33 is illustrated in a short tube shape in FIG. 8, it may be a simple drain port instead of a short tube shape.
  • the first drain pan 31 has the upper surface in FIG. 8 having the water receiving port 32 and the height of the drain port 33 on the primary side of the indoor fans 11 and 12 (secondary side of the indoor heat exchangers 9 and 10). Is set to a height that is sufficiently larger than the maximum differential pressure between the static pressure and the indoor static pressure.
  • an inclined plate 34 is provided on the bottom surface of the inner ducts 24 and 25 on the downstream side of the air flow of the indoor heat exchangers 9 and 10.
  • the inclined plate 34 is formed at a required inclination angle that gradually decreases from the indoor fans 11, 12 side toward the indoor heat exchangers 9, 10, and receives the splash of drain from the indoor heat exchangers 9, 10, The water is guided to the water receiving port 32 of the first drain pan 31 and drained.
  • the second drain pans 35 for receiving the drains are provided.
  • the second drain pan 35 has a drain water-receiving side opening larger than the first drain pan 31 and has one end (left end in FIG. 9) slightly extended to the machine chambers 2b and 3b.
  • a third drain pan 36 is provided at the lower part of the machine room 2b of the lower indoor unit 3 to receive the drain dripped from the refrigerant pipes 13 and the like of the machine rooms 2b and 3b and guide it into the second drain pan 35. Yes.
  • a short tubular external drain outlet 37 and a short tubular preliminary drain pipe 38 are arranged in parallel on the back side bottom outer surface of the machine room 2 b, 3 b of each indoor unit 2, 3. Yes.
  • the external drain drain port portion 37 communicates the inner opening end with the inside of each second drain pan 35, and drains the drain in the second drain pan 35 from the external drain drain port portion 37 to the outside.
  • an external drain drain pipe (not shown) having a deodorizing trap is connected to the external drain drain port 37.
  • a preliminary drain pipe 38 is disposed above the external drain outlet 37. Normally, the drain is not drained from the preliminary drain pipe 38, but even if the external drain drain port 37 is clogged, the drain in the second drain pan 35 is drained, so that the air conditioning operation can be continued. Further, by providing a sensor for detecting water in a connection pipe (not shown) connected to the preliminary drain pipe 38, it is possible to detect clogging of the external drain outlet 37.
  • a top plate 39 is provided at the upper end of the upper indoor unit 2 shown in FIGS.
  • a pair of left and right rope guides 40a and 40b for hooking a transport rope are provided on the top and bottom ends of the top plate 39 as viewed from the front.
  • These rope guides 40a and 40b are made of, for example, a U-shaped steel, and are attached over almost the entire length from one end on the front side of the top plate 39 to the other end on the back side with the U-shaped opening facing upward in the figure. .
  • the transport rope can be hung on the pair of left and right rope guides 40a and 40b to prevent the rope being transported from coming off.
  • the rope guides 40a and 40b can reinforce the strength of the casing of the indoor unit device 6, it is possible to prevent or reduce the deformation and distortion of the indoor unit device 6 during the transportation of the indoor unit device 6. it can.
  • the indoor unit device 6 has an opening including the suction ports 21 and 21 on the back side of the pair of upper and lower indoor units 2 and 3 almost at a predetermined interval.
  • Each rear panel 41a, 41b made of sheet metal, for example, is configured to be attachable.
  • These rear panels 41a and 41b have, for example, a small air conditioning load, so that when one operation of the indoor units 2 and 3 is stopped or when the operation is stopped due to a failure, the indoor units 2 and 3 are stopped.
  • a small air conditioning load By attaching to the back surface and closing the suction port 21, it is possible to prevent or reduce a short circuit in which the temperature-controlled air blown from the blower port 22 is sucked into the suction ports 21 and 21.
  • each indoor unit 2, 3 has a structure in which a pair of left and right sheet metal side panels 42a, 42b for closing the left and right side openings can be attached to the left and right side surfaces.
  • the side panels 42a and 42b are attached, the appearance can be improved, and even when the side panels 42a and 42b are not attached, the air ducts are secured by the inner ducts 24 and 25 and the air conditioning operation is possible. . In that case, cost reduction and weight reduction can be achieved.
  • each indoor unit 2, 3 has a configuration in which a pair of upper and lower front panels 43a, 43b made of a sheet metal closing the front opening can be attached to the front side of the machine room 2b, 3b.
  • An operation unit 44 for operating the air conditioning operation is provided on the outer surface of the upper front panel 43a.
  • the operation is controlled in the following four operation modes (1) to (4) based on the air conditioning load and the cooling water temperature of FC (free cooling).
  • (1) When the outside air temperature is low and the air conditioning load is small, only the FC is operated, and the refrigeration cycle is stopped. Since FC saves power, it uses FC as much as possible.
  • (2) When the air conditioning load is larger than the above (1) by a predetermined value, the compressor of the refrigeration cycle is operated with the minimum capacity, and the FC capacity is controlled variably.
  • the FC capacity is controlled by controlling the opening of a two-way valve (not shown) and controlling the rotational speed of a water circulation pump.
  • the FC capacity is fixed to the maximum (for example, the opening of the two-way valve is fully opened (100%)) and the refrigeration cycle is compressed.
  • the machine's ability is controlled variably.
  • the outside air temperature is high, such as in midsummer, and the hot water of the FC is hot, when the FC is operated, the FC operation is stopped and the refrigeration cycle only is operated when the FC is not cooled but rather heated. To do.
  • the refrigeration cycle and the FC can be controlled in a coordinated manner, and the operation of both systems can be controlled in an integrated manner according to the air conditioning load. Electricity can be planned.
  • the installation space is larger than the case where the indoor units 2 and 3 are installed side by side. Savings.
  • the liquid side of the refrigeration cycle, the gas side pipe connection end portions 17 and 18 and the FC system inlet side and outlet side pipe connection end portions are provided on the upper end surface of the upper indoor unit 2, so that the server By providing the refrigerant system and FC system pipes using the ceiling space in the room or the like, it is possible to save the pipe connection space between the pipe connection ends 17 and 18.
  • the indoor unit devices 6 can be installed in close contact with each other, and installation space can be saved.
  • the indoor unit device 6 can be added and removed easily.
  • this air conditioner 1 since a plurality of indoor units 2, 3 are connected in parallel to the outdoor units 4, 5, so-called multi-connected (multi) connection, the indoor units 2, Even if one of the 3 stops due to a failure or the like, the other can continue the operation. For this reason, it is possible to prevent or reduce an information processing device such as an expensive server or communication device from being down due to a temperature rise.
  • the inner ducts 24 and 25 form an air flow path having substantially the same cross section as the horizontal width of the indoor heat exchangers 9 and 10 and the water heat exchangers 26 and 27, pressure loss can be reduced. That is, the air sucked into the indoor units 2 and 3 from the suction port 21 is widened in the air flow path from the water heat exchangers 26 and 27 and the indoor heat exchangers 9 and 10 to the indoor fans 11 and 12.
  • the inner ducts 24 and 25 maintain the width of the cross section of the air flow path substantially the same as the width of the indoor and water heat exchangers 9, 10, 26, and 27. Pressure loss can be reduced. For this reason, the power consumption of the indoor fans 11 and 12 can be saved.
  • a water receiving port 32 of the first drain pan 31 that receives the drain generated in the indoor heat exchangers 9 and 10 is provided on the downstream side of the indoor heat exchangers 9 and 10 below the inner ducts 24 and 25.
  • the upper surface of the first drain pan 31 having 32 and the drainage port 33 are formed so that the negative pressure is sufficiently lower than the maximum negative pressure on the primary side of the indoor fans 11 and 12.
  • the drain in the first drain pan 31 can be forcibly drained from the drain port 33 into the second drain pan 35 due to the negative pressure difference, and the drain is retained on the inner bottom surfaces of the inner ducts 24 and 25. Can be reduced. Further, the drain of the second drain pan 35 can be drained to the outside from the external drain drain port 37. Furthermore, even if the external drain outlet 37 is clogged, it can be drained to the outside by the preliminary drain pipe 38.
  • the inclined plate 34 is provided on the bottom surface of the inner ducts 24 and 25 on the downstream side of the air flow of the indoor heat exchangers 9 and 10, air flows from the indoor and water heat exchangers 9, 10, 26, and 27. Since the slanted plate 34 receives the splash-like drain that scatters on the flow and guides it to the first drain pan 31 by its downward inclined surface, it can be drained. Can be planned.
  • FC water heat exchangers 26 and 27 can be added as appropriate, so that the air conditioner using the refrigeration cycle and the FC water heat exchanger can be installed separately. The installation space can be saved and the cost can be reduced.
  • FIG. 10 is a plan sectional view showing a modification of the indoor units 2 and 3.
  • a diameter-reduced portion 45 that is reduced to a required diameter is formed at the end of the inner ducts 24, 25 shown in FIG. 3 on the indoor fan 11, 12 side.
  • FIG. 12 is a schematic diagram showing an overall configuration of a modification of the air conditioner 1.
  • This modification is not a multi-connection in which the indoor unit 2 and the indoor unit 3 shown in FIG. 1 are connected in parallel, but a pair in which the indoor unit 2 and the indoor unit 3 are independently connected to the outdoor units 4 and 5, respectively. 1 corresponding connection.
  • the indoor units 2 and 3 are not connected in parallel, a branch pipe becomes unnecessary.
  • the outdoor units 4 and 5 are not outdoor units that support multi-connection, and cheaper outdoor units for one-to-one connection can be used.
  • the air conditioner 1 shown in FIG. 12 can further reduce costs.
  • the machine rooms 2b and 3b have been described as being formed in a communication space that simply communicates in the vertical direction of the indoor units 2 and 3, but the present invention is not limited to this.
  • a partition plate that divides the machine chambers 2b and 3b in the vertical direction corresponding to the indoor units 2 and 3 is provided, and the partition plate is provided with a through-hole that penetrates the refrigerant pipe 13 and the water pipe, thereby The machine rooms 2b and 3b may be communicated.
  • the required number of these communication holes may be formed by knockout holes.
  • FIG. 13 is a schematic diagram showing an overall configuration of another modification of the air conditioner 1.
  • the liquid side and gas side pipe connection portions 17 and 18 shown in FIG. 1 are provided on the lower surface of the lowermost indoor unit 3, and the other configuration is the indoor unit device 6 shown in FIG. 1. It is the same composition as. Also in the air conditioner 1 shown in FIG. 13, the cost can be further reduced by saving the installation space.
  • SYMBOLS 1 Air conditioner, 2, 3 ... Indoor unit, 2b, 3b ... Machine room, 4, 5 ... Outdoor unit, 9, 10 ... Indoor heat exchanger, 11, 12 ... Indoor fan, 13 ... Refrigerant piping, 17 ... Liquid side pipe connection end, 18 ... Gas side pipe connection end, 24, 25 ... Inner duct (ventilation path), 26, 27 ... Water heat exchanger, 31 ... First drain pan, 32 ... Receiving port, 33 ... Drainage Mouth, 34 ... inclined plate, 35 ... second drain pan, 36 ... third drain pan, 37 ... external drain drain port, 39 ... top plate, 40a, 40b ... rope guide.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (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)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

An air conditioner is provided with indoor units which each have a machine chamber, and also with at least one outdoor unit. The indoor units are vertically stacked in tiers, the machine chambers of the indoor units are vertically connected to each other, and the connection end of the piping of the indoor units is provided above the uppermost indoor unit of the indoor units which are stacked in tiers, the connection end being connected to the piping of the outdoor unit.

Description

空気調和機Air conditioner
　本発明の実施形態は、空気調和機に関する。 Embodiments of the present invention relate to an air conditioner.
　一般に、データセンターやサーバルームでは、種々の機能を有するサーバやネットワークを構築するための通信機器等の情報処理機器を収容している。 Generally, data centers and server rooms contain information processing devices such as communication devices for constructing servers and networks having various functions.
　これらデータセンターやサーバルームでは、これら情報処理機器を安定して動作させるためには、常に機器動作に適した温度に維持することが必要であり、そのために空調システムを具備している。 In these data centers and server rooms, in order to stably operate these information processing devices, it is necessary to always maintain a temperature suitable for the device operation, and for this purpose, an air conditioning system is provided.
　この種の従来の空調システムとしては、例えば、特許文献１に記載の空調システムが知られている。 As this type of conventional air conditioning system, for example, an air conditioning system described in Patent Document 1 is known.
特開２０１１－２２０６６５号公報JP 2011-220665 A
　上記特許文献１の空調システムは、室内ユニットである冷却ユニットを、複数のドライコイルユニットにより構成している。各ドライコイルユニットには熱交換器が設けられ、熱交換器の冷媒供給口および冷媒排出口がドライコイルユニットの側面から突出して設けられている。 In the air conditioning system of Patent Document 1, the cooling unit, which is an indoor unit, includes a plurality of dry coil units. Each dry coil unit is provided with a heat exchanger, and a refrigerant supply port and a refrigerant discharge port of the heat exchanger are provided so as to protrude from the side surface of the dry coil unit.
　このため、複数のドライコイルユニットを並べて室内ユニットの冷却ユニットを構成する際に、熱源部分からの冷媒配管と冷媒供給口および冷媒排出口とを接続するためのスペースが必要となるため、複数のドラルコイルユニット同士を密接して配置することができず、室内ユニットの冷却ユニット全体の設置スペースが大きくなっていた。 For this reason, when a plurality of dry coil units are arranged to form a cooling unit for an indoor unit, a space for connecting the refrigerant pipe, the refrigerant supply port, and the refrigerant discharge port from the heat source portion is required. The Doral coil units cannot be arranged closely, and the installation space for the entire cooling unit of the indoor unit is large.
　このような事情から、設置スペースの省スペース化を図った室内ユニットが求められている。 For these reasons, there is a need for indoor units that save space.
　本発明が解決しようとする課題は、室内ユニットの設置スペースの省スペース化を図った空気調和機を提供することにある。 The problem to be solved by the present invention is to provide an air conditioner that saves space for installing an indoor unit.
　本発明が解決しようとする課題は、それぞれに機械室を有する複数台の室内ユニットと少なくとも１台の室外ユニットとを有する空気調和機において、前記複数台の室内ユニットを上下方向に重ねて複数段に形成し、これら室内ユニットの各機械室同士を上下方向に連通させ、前記室外ユニットの配管に接続する前記室内ユニットの配管接続端部を、前記複数段に重ねて配置された室内ユニットのうち最上段に位置する室内ユニットの上部に設けたことを特徴とする、空気調和機を提供することにより達成される。
　また、上記空気調和機は、以下の好適な実施形態を取り得る。
　上記前記各室内ユニットは、それに設けた空気吸込口と空気吹出口を連通する通風路を備え、前記通風路内に、熱交換器及び前記熱交換器に空気を送風するファンを設け、前記熱交換器同士は前記機械室内で配管により並列に連結することが望ましい。
　また、前記各室内ユニットは、前記熱交換器からのドレンを受ける第１ドレンパンをそれぞれ具備することが望ましい。
　また、更に加えて、前記第１ドレンパンと前記機械室内の配管からのドレンを受ける第２ドレンパンを具備することが望ましい。
　また、前記最上段の室内ユニットの上端に天板を設け、前記天板に運搬用ロープを掛止させるロープガイドを形成しても良い。
　また、前記室内ユニットの運転を停止させる場合に、前記空気吸込口を閉鎖するパネルを取付可能とすることが望ましい。 The problem to be solved by the present invention is an air conditioner having a plurality of indoor units each having a machine room and at least one outdoor unit, wherein the plurality of indoor units are stacked in a vertical direction to form a plurality of stages. Among the indoor units arranged in such a manner that each machine room of these indoor units communicates with each other in the vertical direction, and pipe connection end portions of the indoor units connected to the pipes of the outdoor units are stacked on the plurality of stages. This is achieved by providing an air conditioner characterized by being provided at the upper part of the indoor unit located at the uppermost stage.
Moreover, the said air conditioner can take the following suitable embodiment.
Each of the indoor units includes a ventilation path communicating with an air inlet and an air outlet provided in the indoor unit, and a heat exchanger and a fan for blowing air to the heat exchanger are provided in the ventilation path. It is desirable that the exchangers are connected in parallel by piping in the machine room.
In addition, each indoor unit preferably includes a first drain pan that receives drain from the heat exchanger.
In addition, it is desirable to further include a second drain pan that receives drain from the first drain pan and piping in the machine room.
Further, a top plate may be provided at the upper end of the uppermost indoor unit, and a rope guide for hooking a transportation rope to the top plate may be formed.
Moreover, when stopping the operation of the indoor unit, it is desirable that a panel for closing the air suction port can be attached.
　上記特徴を有する本発明の空気調和機によれば、複数台の室内ユニット２、３を上下方向に積み重ねて複数段に形成しているので、これら室内ユニットを横並びで設置する場合よりも、設置スペースの節約を図ることができる。設置スペースを有効に利用して、他の関連配設機器との接続を有効に行うことが可能となる。
　更なる本発明の特徴並びにその効果は、以下に添付図面を参照して説明される本発明の好適な実施形態により、より明確になるであろう。 According to the air conditioner of the present invention having the above features, a plurality of indoor units 2 and 3 are stacked in the vertical direction to form a plurality of stages, so that these indoor units are installed rather than side by side. Space can be saved. The installation space can be effectively used, and connection with other related arrangement devices can be effectively performed.
Further features of the present invention and effects thereof will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings.
本発明の一実施形態に係る空気調和機の全体構成を示す模式図。The schematic diagram which shows the whole structure of the air conditioner which concerns on one Embodiment of this invention. 図１で示す空気調和機の室内ユニット装置の空気吹出口側の正面図。The front view by the side of the air blower outlet of the indoor unit apparatus of the air conditioner shown in FIG. 図２のＩＩＩ－ＩＩＩ線断面図。FIG. 3 is a sectional view taken along line III-III in FIG. 2. 図２のＩＶ－ＩＶ線断面図。FIG. 4 is a sectional view taken along line IV-IV in FIG. 2. 図１で示す室内ユニット装置の空気吹出口側から見た斜視図。The perspective view seen from the air blower outlet side of the indoor unit apparatus shown in FIG. 図４のＶＩ－ＶＩ線断面図。FIG. 6 is a sectional view taken along line VI-VI in FIG. 4. 図１で示す室内ユニット装置の空気吸込口側から見た斜視図。The perspective view seen from the air inlet side of the indoor unit apparatus shown in FIG. 図４等で示す第１、第２ドレンパンや傾斜板等の位置関係を示す模式図。The schematic diagram which shows the positional relationship of the 1st, 2nd drain pan, inclination board, etc. which are shown by FIG. 主に第１～第３のドレンパンの位置関係を示す模式図。FIG. 4 is a schematic diagram mainly showing a positional relationship between first to third drain pans. 図３で示すインナーダクトの変形例を示す室内ユニットの平断面図。The plane sectional view of the indoor unit which shows the modification of the inner duct shown in FIG. 図２で示す室内ファンの変形例を示す室内ユニットの正面図。The front view of the indoor unit which shows the modification of the indoor fan shown in FIG. 図１で示す空気調和機の変形例を示す模式図。The schematic diagram which shows the modification of the air conditioner shown in FIG. 図１で示す空気調和機の他の変形例を示す模式図。The schematic diagram which shows the other modification of the air conditioner shown in FIG. 図１で示す空気調和機を複数設置した状態を示す模式図。The schematic diagram which shows the state which installed multiple air conditioners shown in FIG.
　以下、本発明の実施形態を図面を参照して説明する。なお、複数の図面中、同一または相当部分には同一符号を付している。また、以下の記載において、上下、左右等方向を示す用語は図示の状態、または据え付け状態を基準として述べる。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or an equivalent part in several drawing. In the following description, terms indicating vertical and horizontal directions will be described with reference to the illustrated state or the installed state.
　図１は実施形態に係る空気調和機の全体構成を示す模式図であり、フリークーリングシステム（ＦＣ）は図示省略している。この実施形態に係る空気調和機１は、Ｒ４１０Ａ等の冷媒が循環する冷凍サイクルの冷媒熱交換器（室内熱交換器）と、フリークーリングシステム（ＦＣ）の水熱交換器を併設できるように構成されている。 FIG. 1 is a schematic diagram showing an overall configuration of an air conditioner according to an embodiment, and a free cooling system (FC) is not shown. The air conditioner 1 according to this embodiment is configured such that a refrigerant heat exchanger (indoor heat exchanger) of a refrigeration cycle in which refrigerant such as R410A circulates and a water heat exchanger of a free cooling system (FC) can be provided. Has been.
　図１に基づいて空気調和機の冷凍サイクルについて説明する。 The refrigeration cycle of the air conditioner will be described based on FIG.
　すなわち、図１に示すように空気調和機１は、同形同大の複数台、例えば２台の室内ユニット２、３と、１台以上複数台、例えば２台の室外ユニット４、５とを具備している。ここで、各室内ユニット２、３の冷房定格（最大）能力はそれぞれ１０馬力（２８ｋＷ）であり、空気調和機１全体で２０馬力（５６ｋＷ）である。 That is, as shown in FIG. 1, the air conditioner 1 includes a plurality of units of the same shape and size, for example, two indoor units 2 and 3, and one or more units, for example, two outdoor units 4 and 5. It has. Here, the cooling rated (maximum) capacity of each of the indoor units 2 and 3 is 10 horsepower (28 kW), and the entire air conditioner 1 is 20 horsepower (56 kW).
　これら２台の室内ユニット２、３は上下方向に複数段に積み重ねられて互いに固定され、１台の室内ユニット装置６として構成されている。 These two indoor units 2 and 3 are stacked in a plurality of stages in the vertical direction and fixed to each other to constitute one indoor unit device 6.
　上記各室内ユニット２、３は、後述するように立方体のフレーム構造（骨組み構造）の筺体７、８をそれぞれ有し、上段の室内ユニット２の筺体７の上端には、後述の天板３９を設けている。また、これらの各筺体７、８内には、室内熱交換器９、１０、室内ファン１１、１２等を収容する通風室２ａ、３ａと、冷媒配管１３等を収容する機械室２ｂ、３ｂとを形成している。機械室２ｂ、３ｂは上下一対の室内ユニット２、３を上下方向に連通可能に形成されている。冷媒配管１３は、各室内熱交換器９、１０に接続される液側冷媒配管１３ａと、ガス側冷媒配管１３ｂとを具備している。 Each of the indoor units 2 and 3 has a cubic frame structure (frame structure) 7 and 8 as will be described later, and a top plate 39 which will be described later is provided at the upper end of the upper body 7 of the upper indoor unit 2. Provided. Moreover, in each of these housings 7 and 8, ventilation chambers 2a and 3a for accommodating indoor heat exchangers 9 and 10, indoor fans 11 and 12 and machine chambers 2b and 3b for accommodating refrigerant piping 13 and the like. Is forming. The machine rooms 2b and 3b are formed so that a pair of upper and lower indoor units 2 and 3 can communicate with each other in the vertical direction. The refrigerant pipe 13 includes a liquid side refrigerant pipe 13a connected to each indoor heat exchanger 9, 10, and a gas side refrigerant pipe 13b.
　すなわち、液側冷媒配管１３ａは、その先端部を２股に分岐する分岐管１３ａ１、１３ａ２を介して上下一対の室内熱交換器９、１０の冷媒入口にそれぞれ接続されている。これら２股の各分岐管１３ａ１、１３ａ２は、その途中に、膨張弁１５、１６をそれぞれ介装している。この膨張弁１５、１６は、開度を調節可能な電子膨張弁である。 That is, the liquid-side refrigerant pipe 13a are connected to the refrigerant inlet of the branch pipe 13a 1, 13a 2 of the upper and lower through the indoor heat exchanger 9 and 10 for branching the tip 2 crotch. Each of the bifurcated branch pipes 13a 1 and 13a 2 is provided with expansion valves 15 and 16 in the middle thereof. The expansion valves 15 and 16 are electronic expansion valves whose opening degrees can be adjusted.
　ガス側冷媒配管１３ｂも、その先端部を２股に分岐する分岐管１３ｂ１、１３ｂ２を介して上下一対の室内熱交換器９、１０の各冷媒出口にそれぞれ接続されている。すなわち、上下２台の室内熱交換器９、１０同士は並列に接続されている。 The gas-side refrigerant pipe 13b is also connected to the refrigerant outlets of the pair of upper and lower indoor heat exchangers 9 and 10 via branch pipes 13b 1 and 13b 2 that branch the tip part into two branches. That is, the upper and lower indoor heat exchangers 9 and 10 are connected in parallel.
　また、これら液側、ガス側冷媒配管１３ａ、１３ｂは、その図１中の上端部を、最上段の室内ユニット２の天板３９の上端貫通孔１４より上方外方へそれぞれ延出させ、その端部に液側、ガス側配管接続端部１７、１８をそれぞれ形成している。なお、液側、ガス側配管接続端部１７、１８は上段の室内ユニット２の上端部上に設けなくてもよく、配管接続作業を行う作業員の手が届く上端部近傍であれば上段の室内ユニット２の機械室２ｂの内部でもよい。 Further, the liquid side and gas side refrigerant pipes 13a and 13b extend the upper end portion in FIG. 1 upward and outward from the upper end through hole 14 of the top plate 39 of the uppermost indoor unit 2, respectively. Liquid side and gas side pipe connection ends 17 and 18 are formed at the ends, respectively. The liquid-side and gas-side pipe connection ends 17 and 18 do not have to be provided on the upper end of the upper indoor unit 2, and the upper side is close to the upper end where a worker who performs the pipe connection work can reach. It may be inside the machine room 2b of the indoor unit 2.
　この液側配管接続端部１７には、少なくとも１台、例えば２台、の冷媒室外ユニット４、５の各液側配管接続部にそれぞれ接続された液側冷媒接続配管１９が接続される。 The liquid side pipe connection end portion 17 is connected to the liquid side refrigerant connection pipe 19 connected to each liquid side pipe connection portion of at least one, for example, two refrigerant outdoor units 4 and 5.
　また、室内ユニット２、３側のガス側配管接続端部１８には、冷媒室外ユニット４、５の各ガス側配管接続部に接続されたガス側冷媒接続配管２０が接続されている。すなわち、２台の冷媒室外ユニット４、５同士も並列に接続されている。 Further, gas side refrigerant connection pipes 20 connected to the gas side pipe connection portions of the refrigerant outdoor units 4 and 5 are connected to the gas side pipe connection end portions 18 on the indoor units 2 and 3 side. That is, the two refrigerant outdoor units 4, 5 are also connected in parallel.
　各室外ユニット４、５は、その筺体内に、少なくとも図示省略の圧縮機、室外熱交換器、室外ファン等を配設しており、各室内ユニット２、３の室内熱交換器９、１０とは多岐接続されている。 Each outdoor unit 4, 5 is provided with at least a compressor, an outdoor heat exchanger, an outdoor fan, etc. (not shown) in its housing, and the indoor heat exchangers 9, 10 of each indoor unit 2, 3, Are connected in many ways.
　次に、上記室内ユニット装置６のより具体的な構成を説明する。 Next, a more specific configuration of the indoor unit device 6 will be described.
　本実施形態においては、フリークーリングシステム（ＦＣ）の水熱交換器を併設した場合について説明する。 In this embodiment, a case where a water heat exchanger of a free cooling system (FC) is provided will be described.
　図２～図９に示すように、室内ユニット装置６は、各室内ユニット２、３の筺体７、８を、例えばＣ形、Ｌ形等の形鋼により直方体のフレーム構造（骨組み構造）に構成しており、筺体７、８の背面（図３では上端）側に、空気の吸込口２１を形成し、その正面（図３では下端）側に、空気の吹出口２２を形成している。吸込口２１は室内ユニット２、３の背面側をほぼ全面的に開口させて形成されており、水熱交換器２６、２７の背面のほぼ全面を露出させている。吹出口２２は室内ユニット２、３の正面のほぼ全面を開口させて例えば正方形に形成されている。また、これら上下一対の筺体７、８同士の接合部の外周の各辺（四辺）には、金属製帯板状の補強板２３をほぼ全周に亘って固定しており、この接合部の固定強度の向上が図られている。 As shown in FIGS. 2 to 9, the indoor unit device 6 is configured such that the casings 7 and 8 of the indoor units 2 and 3 are formed into a rectangular parallelepiped frame structure (frame structure) using, for example, a C-shaped or L-shaped steel. In addition, an air suction port 21 is formed on the back surface (upper end in FIG. 3) side of the housings 7 and 8, and an air outlet 22 is formed on the front surface (lower end in FIG. 3) side. The suction port 21 is formed so that the back sides of the indoor units 2 and 3 are opened almost entirely, and almost the entire back surfaces of the water heat exchangers 26 and 27 are exposed. The air outlet 22 is formed in, for example, a square shape by opening almost the entire front surface of the indoor units 2 and 3. In addition, a metal strip-shaped reinforcing plate 23 is fixed over almost the entire circumference of each side (four sides) of the outer periphery of the joint between the pair of upper and lower housings 7 and 8. Improvement of fixing strength is achieved.
　図３に示すように、各筺体７、８は、その通風室２ａ、３ａに、板金製等のほぼ角筒直胴状のインナーダクト（通風路）２４、２５を配設している。 As shown in FIG. 3, the casings 7 and 8 are provided with inner ducts (ventilation passages) 24 and 25 having a substantially rectangular tube straight body shape made of sheet metal or the like in the ventilation chambers 2a and 3a.
　各インナーダクト２４、２５は、その吸込口２１側に、室内熱交換器９、１０をそれぞれ設け、その内部の吹出口２２側に室内ファン１１、１２をそれぞれ設け、インナーダクト２４、２５を介して吸込口２１と吹出口２２とを対向させると共に連通させている。 Each of the inner ducts 24 and 25 is provided with the indoor heat exchangers 9 and 10 on the inlet 21 side, and the indoor fans 11 and 12 are provided on the outlet 22 side of the inner ducts 24 and 25, respectively. The suction port 21 and the air outlet 22 are opposed to each other and communicated with each other.
　また、インナーダクト２４、２５は、室内熱交換器９、１０と吸込口２１側との間にて、フリークーリングシステムの水熱交換器２６、２７を追加して併設できるようにそれぞれ構成されている。 Moreover, the inner ducts 24 and 25 are each comprised so that the water heat exchangers 26 and 27 of a free cooling system can be additionally provided between the indoor heat exchangers 9 and 10 and the suction inlet 21 side. Yes.
　フリークーリングシステムは、上下一対の水熱交換器２６、２７の図示省略の水入口同士と、各水出口同士を図示しない水配管の入側、出側水配管によりそれぞれ連結して上下一対の水熱交換器２６、２７同士を並列に接続している。そして、これら入側、出側水配管は機械室２ｂの上方へ延出し、図５、図７に示すように冷媒配管の液側、ガス側配管接続端部１７、１８と同様に入側、出側配管接続端部５０、５１を形成している。これら水配管の入側、出側配管接続端部５０、５１は図示省略の接続水配管を介してクーリングタワー等の水冷却器に接続される。クーリングタワーも少なくとも１台でよいが、複数台、例えば２台の場合には、室外ユニット４、５と同様に図示省略の連結用水配管により並列に接続される。 In the free cooling system, a pair of upper and lower water heat exchangers 26 and 27 are connected to each other by a water pipe (not shown) and the water outlets are connected to each other by an inlet side and an outlet side water pipe (not shown). The heat exchangers 26 and 27 are connected in parallel. These inlet and outlet water pipes extend upward from the machine room 2b, and as shown in FIGS. 5 and 7, the inlet side, as well as the liquid side of the refrigerant pipe and the gas side pipe connection ends 17 and 18, Outlet pipe connection end portions 50 and 51 are formed. The inlet side and outlet side pipe connection ends 50 and 51 of these water pipes are connected to a water cooler such as a cooling tower via a connection water pipe (not shown). At least one cooling tower may be used, but in the case of a plurality of units, for example, two units, they are connected in parallel by a connecting water pipe (not shown) as in the case of the outdoor units 4 and 5.
　水熱交換器２６、２７内を通水する冷却水流量は水配管途中に介装された電動二方弁の開度と水循環ポンプ（いずれも図示しない）の回転数により制御される。なお、フリークーリングシステムは、空気調和機１の冷凍サイクルによる冷房定格（最大）能力と同等の能力を出力できるように水熱交換器２６、２７の容量が設定されている。 The flow rate of the cooling water passing through the water heat exchangers 26 and 27 is controlled by the opening degree of the electric two-way valve interposed in the middle of the water pipe and the rotational speed of the water circulation pump (both not shown). In addition, the capacity | capacitance of the water heat exchangers 26 and 27 is set so that the free cooling system can output the capacity | capacitance equivalent to the cooling rated (maximum) capacity | capacitance by the refrigerating cycle of the air conditioner 1. FIG.
　また、インナーダクト２４、２５は、ほぼ角筒直胴状のダクトよりなり、水熱交換器２６、２７、室内熱交換器９、１０と、室内ファン１１、１２とを結ぶ空気流路を、これら熱交換器９、１０、水熱交換器２６、２７の横幅とほぼ同じ断面の空気流路（通風路）に形成している。 The inner ducts 24 and 25 are substantially rectangular tube-shaped ducts, and air flow paths connecting the water heat exchangers 26 and 27, the indoor heat exchangers 9 and 10 and the indoor fans 11 and 12 are provided. These heat exchangers 9 and 10 and the water heat exchangers 26 and 27 are formed in an air flow path (ventilation path) having substantially the same cross section as the lateral width.
　室内ファン１１、１２は、例えばプロペラファンやターボファン等のファンに、直流ファンモータ等のモータを一体に設けることにより構成されている。図２～図５に示すように本実施形態では、ファンにターボファンを採用している。 The indoor fans 11 and 12 are configured by, for example, providing a motor such as a direct current fan motor integrally with a fan such as a propeller fan or a turbo fan. As shown in FIGS. 2 to 5, in this embodiment, a turbo fan is employed as the fan.
　室内ファン１１、１２はファン外面を覆う図示省略のファンガードを備えており、このファンガードの中央部外面には、ファンモータの外面を被覆して保護する保護カバーを設けている。 The indoor fans 11 and 12 include a fan guard (not shown) that covers the outer surface of the fan, and a protective cover that covers and protects the outer surface of the fan motor is provided on the outer surface of the center of the fan guard.
　室内ファン１１、１２は、インナーダクト２４、２５に設けられた取付板２４ａ、２５ｂに取り付けられている。この取付板２４ａ、２５ｂによって、インナーダクト２４、２５は室内ファン１１、１２の一次側（室内熱交換器側）と二次側（吹出口２２側）とに仕切られている。図２に示すように、インナーダクト２４、２５の二次側は、その流路断面が略正方形に形成されている。なお、インナーダクト２４、２５の一次側と二次側の横幅寸法は同一であるが、インナーダクト２４、２５の縦方向寸法は、一次側の下面に後述する傾斜板３４（図８）を設ける分、二次側に比べて一次側の方が小さくなる。本実施形態では、インナーダクト２４、２５の二次側流路断面（吹出口２２）の縦方向寸法Ｌｈ、幅方向寸法Ｌｗをそれぞれ１０００ｍｍとし、室内ファン１１、１２のターボファンの直径Ｄ１を５００ｍｍとしている。二次側流路形状を正方形とし、ターボファンの直径Ｄ１を流路断面寸法（Ｌｈ、Ｌｗ）の略１／２とすることが送風効率の面で最も好ましい。 The indoor fans 11 and 12 are attached to attachment plates 24a and 25b provided in the inner ducts 24 and 25, respectively. The inner ducts 24, 25 are partitioned by the mounting plates 24 a, 25 b into a primary side (indoor heat exchanger side) and a secondary side (outlet 22 side) of the indoor fans 11, 12. As shown in FIG. 2, on the secondary side of the inner ducts 24, 25, the flow path cross section is formed in a substantially square shape. Although the horizontal dimensions of the primary duct and the secondary duct of the inner ducts 24 and 25 are the same, the longitudinal dimension of the inner ducts 24 and 25 is provided with an inclined plate 34 (FIG. 8) to be described later on the lower surface of the primary duct. The primary side is smaller than the secondary side. In the present embodiment, the longitudinal dimension Lh and the width dimension Lw of the secondary side flow passage cross section (blower port 22) of the inner ducts 24 and 25 are each 1000 mm, and the turbo fan diameter D1 of the indoor fans 11 and 12 is 500 mm. It is said. It is most preferable in terms of air blowing efficiency that the secondary side channel shape is square and the diameter D1 of the turbofan is approximately ½ of the channel cross-sectional dimensions (Lh, Lw).
　図１１に室内ファン１１、１２のファンにプロペラファンを採用した室内ユニット装置６を示す。インナーダクト２４、２５の２次側流路断面寸法Ｌｈ、Ｌｗは１０００ｍｍで同じであるが、プロペラファンの直径Ｄ２を６３０ｍｍとしている。このようにプロペラファンを用いる場合には、プロペラファンの直径Ｄ２を流路断面寸法（Ｌｈ、Ｌｗ）の略３／５とすることが送風効率の面で最も好ましい。 FIG. 11 shows the indoor unit device 6 in which a propeller fan is adopted as the fan of the indoor fans 11 and 12. Although the secondary side channel cross-sectional dimensions Lh and Lw of the inner ducts 24 and 25 are the same at 1000 mm, the diameter D2 of the propeller fan is set to 630 mm. Thus, when using a propeller fan, it is most preferable from the surface of ventilation efficiency that the diameter D2 of a propeller fan shall be about 3/5 of flow-path cross-sectional dimension (Lh, Lw).
　図３等に示すように、インナーダクト２４、２５の一側面と、室内ユニット２、３の外側面（図３では右側面）との間には、上記機械室２ｂ、３ｂが形成されている。この機械室２ｂ、３ｂは図１、図６に示すように、上下一対の室内ユニット２、３の上下方向に連通するように形成され、上記冷媒配管１３や水配管、図５で示す主制御基板２８、副制御基板２９、冷媒配管１３に介装された膨張弁１５、１６等が収容される。 As shown in FIG. 3 and the like, the machine chambers 2b and 3b are formed between one side surface of the inner ducts 24 and 25 and the outer side surface (right side surface in FIG. 3) of the indoor units 2 and 3. . As shown in FIGS. 1 and 6, the machine chambers 2b and 3b are formed so as to communicate in the vertical direction of the pair of upper and lower indoor units 2 and 3, and the main control shown in FIG. The board 28, the sub control board 29, the expansion valves 15 and 16 interposed in the refrigerant pipe 13, and the like are accommodated.
　図７に示すように膨張弁１５、１６は室内ユニット２、３の背面側または、その近傍に配設され、背面側から容易にアクセスし、メンテナンスできるようになっている。 As shown in FIG. 7, the expansion valves 15 and 16 are disposed on the back side of the indoor units 2 and 3 or in the vicinity thereof, and can be easily accessed and maintained from the back side.
　また、図５で示す主制御基板２８は、２台の室内ユニット２、３の運転を統合制御する制御装置であり、例えば上段の室内ユニット２の機械室２ｂ内に配設される。副制御基板２９は室内ユニット２、３の各々の機械室２ｂ、３ｂ内に配設され、室外ユニットの制御装置からの指令により、各膨張弁１５、１６の開度等を制御する制御装置である。 Further, the main control board 28 shown in FIG. 5 is a control device that integrally controls the operation of the two indoor units 2 and 3, and is disposed, for example, in the machine room 2 b of the upper indoor unit 2. The sub-control board 29 is a control device that is disposed in each of the machine chambers 2b and 3b of the indoor units 2 and 3 and controls the opening degree of the expansion valves 15 and 16 according to a command from the control device of the outdoor unit. is there.
　下段の室内ユニット３の筐体８には、その底部左右端部の外面に、所定高さ（厚さ）の左右一対の角柱状の基台３０ａ、３０ｂを配設し、これら基台３０ａ、３０ｂを介して室内ユニット装置６を所要の設置面に設置固定し、この設置面と下段の室内ユニット３の外底面との間に所要の間隙を形成している。 The casing 8 of the lower indoor unit 3 is provided with a pair of right and left prism bases 30a and 30b having a predetermined height (thickness) on the outer surfaces of the bottom left and right ends thereof. The indoor unit device 6 is installed and fixed on a required installation surface via 30b, and a required gap is formed between this installation surface and the outer bottom surface of the lower indoor unit 3.
　また、図８、図９に示すように各室内ユニット２、３は、各室内熱交換器９、１０と各水熱交換器２６、２７の下部かつインナーダクト２４、２５の下部であって、室内熱交換器９、１０の空気流下流側（二次側）に、これら室内、水熱交換器９、１０、２６、２７で発生したドレンを受ける第１のドレンパン３１を設けている。第１のドレンパン３１は、図８における上面に、室内熱交換器９、１０よりも空気流下流側で連通する受水口３２を設ける一方、第１のドレンパン３１の下部に排水口３３を設けている。この排水口３３は図８では短管状に図示しているが、短管状とはせずに単なる排水口でもよい。この第１のドレンパン３１は、その受水口３２を有する図８中の上面と、排水口３３の高さを、室内ファン１１、１２の一次側（室内熱交換器９、１０の二次側）の静圧と室内静圧との最大差圧よりも十分に余裕のある高さに設定している。 Further, as shown in FIGS. 8 and 9, the indoor units 2 and 3 are located below the indoor heat exchangers 9 and 10 and the water heat exchangers 26 and 27 and below the inner ducts 24 and 25, respectively. On the downstream side (secondary side) of the indoor heat exchangers 9 and 10, a first drain pan 31 that receives drain generated in the indoor and water heat exchangers 9, 10, 26, and 27 is provided. The first drain pan 31 is provided with a water receiving port 32 communicating with the downstream side of the air flow from the indoor heat exchangers 9 and 10 on the upper surface in FIG. 8, while a drain port 33 is provided below the first drain pan 31. Yes. Although the drain port 33 is illustrated in a short tube shape in FIG. 8, it may be a simple drain port instead of a short tube shape. The first drain pan 31 has the upper surface in FIG. 8 having the water receiving port 32 and the height of the drain port 33 on the primary side of the indoor fans 11 and 12 (secondary side of the indoor heat exchangers 9 and 10). Is set to a height that is sufficiently larger than the maximum differential pressure between the static pressure and the indoor static pressure.
　これにより、室内ファン１１、１２による静圧低下によりインナーダクト２４、２５内にドレンが滞留することを未然に防止できる。 Thereby, it is possible to prevent drainage from staying in the inner ducts 24 and 25 due to a decrease in static pressure by the indoor fans 11 and 12.
　また、インナーダクト２４、２５の底面には、室内熱交換器９、１０の空気流下流側に傾斜板３４を設けている。傾斜板３４は室内ファン１１、１２側から室内熱交換器９、１０に向けて漸次低くなる所要の傾斜角で形成されており、室内熱交換器９、１０からのドレンの飛沫を受けて、第１のドレンパン３１の受水口３２へ案内し排水するようになっている。 Further, an inclined plate 34 is provided on the bottom surface of the inner ducts 24 and 25 on the downstream side of the air flow of the indoor heat exchangers 9 and 10. The inclined plate 34 is formed at a required inclination angle that gradually decreases from the indoor fans 11, 12 side toward the indoor heat exchangers 9, 10, and receives the splash of drain from the indoor heat exchangers 9, 10, The water is guided to the water receiving port 32 of the first drain pan 31 and drained.
　また、図９にも示すように、第１のドレンパン３１の下方には、このドレンパン３１の排水口３３から排水されるドレンと、室内熱交換器９、１０と水熱交換器２６、２７からのドレンを受ける第２のドレンパン３５をそれぞれ設けている。第２のドレンパン３５は、そのドレン受水側開口を第１のドレンパン３１よりも大きく形成し、その一端部（図９では左端部）を機械室２ｂ、３ｂ側まで若干延在させている。 Further, as shown in FIG. 9, below the first drain pan 31, there are drains drained from a drain port 33 of the drain pan 31, indoor heat exchangers 9 and 10, and water heat exchangers 26 and 27. The second drain pans 35 for receiving the drains are provided. The second drain pan 35 has a drain water-receiving side opening larger than the first drain pan 31 and has one end (left end in FIG. 9) slightly extended to the machine chambers 2b and 3b.
　また、下段の室内ユニット３の機械室２ｂの下部には、機械室２ｂ、３ｂの冷媒配管１３等から滴下するドレンを受けて第２のドレンパン３５内へ案内する第３のドレンパン３６を設けている。 Further, a third drain pan 36 is provided at the lower part of the machine room 2b of the lower indoor unit 3 to receive the drain dripped from the refrigerant pipes 13 and the like of the machine rooms 2b and 3b and guide it into the second drain pan 35. Yes.
　さらに、図７に示すように各室内ユニット２、３の機械室２ｂ、３ｂの背面側底部外面には、短管状の外部ドレン排水口部３７と短管状の予備ドレン管３８を並設している。 Further, as shown in FIG. 7, a short tubular external drain outlet 37 and a short tubular preliminary drain pipe 38 are arranged in parallel on the back side bottom outer surface of the machine room 2 b, 3 b of each indoor unit 2, 3. Yes.
　外部ドレン排水口部３７は、その内側開口端を各第２のドレンパン３５の内部に連通させ、第２のドレンパン３５内のドレンを外部ドレン排水口部３７から外部へ排水する。この外部ドレン排水口部３７には、例えば防臭用のトラップを有する図示省略の外部ドレン排水管が接続される。 The external drain drain port portion 37 communicates the inner opening end with the inside of each second drain pan 35, and drains the drain in the second drain pan 35 from the external drain drain port portion 37 to the outside. For example, an external drain drain pipe (not shown) having a deodorizing trap is connected to the external drain drain port 37.
　外部ドレン排水口３７より上部には予備ドレン管３８が配設される。通常はこの予備ドレン管３８からは排水されないが、万一、外部ドレン排水口３７が詰まった場合にも、第２のドレンパン３５内のドレンを排水するので、空調運転の継続が可能である。また、予備ドレン管３８に接続される図示省略の接続管に水を検知するセンサを設けることにより、外部ドレン排水口３７の詰まりを検出できる。 A preliminary drain pipe 38 is disposed above the external drain outlet 37. Normally, the drain is not drained from the preliminary drain pipe 38, but even if the external drain drain port 37 is clogged, the drain in the second drain pan 35 is drained, so that the air conditioning operation can be continued. Further, by providing a sensor for detecting water in a connection pipe (not shown) connected to the preliminary drain pipe 38, it is possible to detect clogging of the external drain outlet 37.
　尚、図５や図７等で示す上段の室内ユニット２の上端に、天板３９を設けている。図中、天板３９の上面には、その正面から見て左右端部に、図示省略の運搬用ロープを掛止させる左右一対のロープガイド４０ａ、４０ｂが設けられている。これらロープガイド４０ａ、４０ｂは、例えばコ字形の形鋼よりなり、そのコ字形開口を図中上方へ向けて天板３９の正面側一端から背面側他端までほぼ全長に亘って取付けられている。 A top plate 39 is provided at the upper end of the upper indoor unit 2 shown in FIGS. In the drawing, a pair of left and right rope guides 40a and 40b for hooking a transport rope (not shown) are provided on the top and bottom ends of the top plate 39 as viewed from the front. These rope guides 40a and 40b are made of, for example, a U-shaped steel, and are attached over almost the entire length from one end on the front side of the top plate 39 to the other end on the back side with the U-shaped opening facing upward in the figure. .
　したがって、大重量の室内ユニット装置６を運搬する場合に、これら左右一対のロープガイド４０ａ、４０ｂに運搬用ロープを掛け、運搬中のロープの外れを未然に防止できる。 Therefore, when the heavy indoor unit device 6 is transported, the transport rope can be hung on the pair of left and right rope guides 40a and 40b to prevent the rope being transported from coming off.
　また、ロープガイド４０ａ、４０ｂは室内ユニット装置６の筐体の強度を補強できるので、室内ユニット装置６の運搬時の室内ユニット装置６の変形や歪みの発生の防止したり、低減を図ることができる。 Moreover, since the rope guides 40a and 40b can reinforce the strength of the casing of the indoor unit device 6, it is possible to prevent or reduce the deformation and distortion of the indoor unit device 6 during the transportation of the indoor unit device 6. it can.
　さらに、図５、図７に示すように室内ユニット装置６は、その上下一対の各室内ユニット２、３の背面側の吸込口２１、２１を含む開口を所要の間隔を置いてほぼ全面的にそれぞれ閉塞する、例えば、板金製の背面パネル４１ａ、４１ｂを取付可能に構成されている。 Furthermore, as shown in FIGS. 5 and 7, the indoor unit device 6 has an opening including the suction ports 21 and 21 on the back side of the pair of upper and lower indoor units 2 and 3 almost at a predetermined interval. Each rear panel 41a, 41b made of sheet metal, for example, is configured to be attachable.
　これら背面パネル４１ａ、４１ｂは、例えば空調負荷が小さいために、室内ユニット２、３の一方の運転を停止させる場合や故障で運転停止させる場合に、その一方の運転を停止させる室内ユニット２、３の背面に取り付けて吸込口２１を閉塞することにより、吹出口２２から吹き出された調温吹出風が吸込口２１、２１に吸い込まれるショートサーキットの防止または低減を図ることができる。 These rear panels 41a and 41b have, for example, a small air conditioning load, so that when one operation of the indoor units 2 and 3 is stopped or when the operation is stopped due to a failure, the indoor units 2 and 3 are stopped. By attaching to the back surface and closing the suction port 21, it is possible to prevent or reduce a short circuit in which the temperature-controlled air blown from the blower port 22 is sucked into the suction ports 21 and 21.
　また、各室内ユニット２、３は、その左右側面に、その左右側面開口を閉塞する左右一対の板金製の側面パネル４２ａ、４２ｂを取付可能な構成としている。側面パネル４２ａ、４２ｂを取り付ける場合には外観の向上を図ることができ、また、側面パネル４２ａ、４２ｂは取り付けない場合でも、インナーダクト２４、２５により通風路が確保され、空調運転可能であるの。その場合はコスト低減と軽量化を図ることができる。 Further, each indoor unit 2, 3 has a structure in which a pair of left and right sheet metal side panels 42a, 42b for closing the left and right side openings can be attached to the left and right side surfaces. When the side panels 42a and 42b are attached, the appearance can be improved, and even when the side panels 42a and 42b are not attached, the air ducts are secured by the inner ducts 24 and 25 and the air conditioning operation is possible. . In that case, cost reduction and weight reduction can be achieved.
　さらにまた、各室内ユニット２、３は、その機械室２ｂ、３ｂの正面側に、その正面開口を閉塞する上下一対の板金製の上下一対の正面パネル４３ａ、４３ｂを取付可能な構成としている。上部の正面パネル４３ａの外面には、空調運転を操作するための操作部４４を設けている。 Furthermore, each indoor unit 2, 3 has a configuration in which a pair of upper and lower front panels 43a, 43b made of a sheet metal closing the front opening can be attached to the front side of the machine room 2b, 3b. An operation unit 44 for operating the air conditioning operation is provided on the outer surface of the upper front panel 43a.
　このように構成された空気調和機１では、空調負荷とＦＣ（フリークーリング）の冷却水温度とに基づいて、次の４つの運転モード（１）－（４）により運転制御される。
　（１）外気温が低く、空調負荷が小さいときは、ＦＣのみを運転し、冷凍サイクルは運転を停止する。ＦＣは省電力であるので、ＦＣを最大限利用する。
　（２）上記（１）よりも空調負荷が所定値大きい場合は、冷凍サイクルの圧縮機を最小能力に固定して運転し、ＦＣの能力を可変に制御する。ＦＣの能力は図示省略の二方弁の開度制御と、水循環ポンプの回転数制御等により行われる。
　（３）さらに、上記（２）よりも空調負荷が所定値大きい場合は、ＦＣの能力を最大に固定（例えば二方弁の開度を全開（１００％）に固定）し、冷凍サイクルの圧縮機の能力を可変に制御する。
　（４）盛夏期等外気温が高く、ＦＣの温水が高温である場合、ＦＣを運転すると、冷房ではなく、むしろ暖房してしまうような状態ではＦＣの運転を停止し、冷凍サイクルのみを運転する。 In the air conditioner 1 configured as described above, the operation is controlled in the following four operation modes (1) to (4) based on the air conditioning load and the cooling water temperature of FC (free cooling).
(1) When the outside air temperature is low and the air conditioning load is small, only the FC is operated, and the refrigeration cycle is stopped. Since FC saves power, it uses FC as much as possible.
(2) When the air conditioning load is larger than the above (1) by a predetermined value, the compressor of the refrigeration cycle is operated with the minimum capacity, and the FC capacity is controlled variably. The FC capacity is controlled by controlling the opening of a two-way valve (not shown) and controlling the rotational speed of a water circulation pump.
(3) Furthermore, when the air conditioning load is larger than the above (2), the FC capacity is fixed to the maximum (for example, the opening of the two-way valve is fully opened (100%)) and the refrigeration cycle is compressed. The machine's ability is controlled variably.
(4) When the outside air temperature is high, such as in midsummer, and the hot water of the FC is hot, when the FC is operated, the FC operation is stopped and the refrigeration cycle only is operated when the FC is not cooled but rather heated. To do.
　上述のように本実施態様の空気調和機１によれば、冷凍サイクルとＦＣの連携制御が可能であり、また、空調負荷に応じて、これら両系の運転を統合的に制御可能となり、省電力を図ることができる。 As described above, according to the air conditioner 1 of this embodiment, the refrigeration cycle and the FC can be controlled in a coordinated manner, and the operation of both systems can be controlled in an integrated manner according to the air conditioning load. Electricity can be planned.
　上記の空気調和機１によれば、２台の室内ユニット２、３を上下方向に積み重ねて複数段に形成しているので、これら室内ユニット２、３を横並びで設置する場合よりも、設置スペースの節約を図ることができる。 According to the air conditioner 1 described above, since the two indoor units 2 and 3 are stacked in the vertical direction and formed in a plurality of stages, the installation space is larger than the case where the indoor units 2 and 3 are installed side by side. Savings.
　さらに、冷凍サイクルの液側、ガス側配管接続端部１７、１８とＦＣ系の入側、出側配管接続端部（図示省略）を上段の室内ユニット２の上端面上に設けたので、サーバルーム等室内の天井スペースを利用して冷媒系とＦＣ系の配管を設けることにより、これら配管接続端部１７、１８との配管接続スペースの節約を図ることができる。これにより、図１４に示すように複数の室内ユニット装置６を横並びで設置する場合、室内ユニット装置６を互いに密接して設置することが可能になり、設置スペースの節約を図ることができる。さらに、室内ユニット装置６の増設時や交換時において、配管類が邪魔になることがないので、室内ユニット装置６を追加、撤去作業が容易となる。 Further, the liquid side of the refrigeration cycle, the gas side pipe connection end portions 17 and 18 and the FC system inlet side and outlet side pipe connection end portions (not shown) are provided on the upper end surface of the upper indoor unit 2, so that the server By providing the refrigerant system and FC system pipes using the ceiling space in the room or the like, it is possible to save the pipe connection space between the pipe connection ends 17 and 18. As a result, when a plurality of indoor unit devices 6 are installed side by side as shown in FIG. 14, the indoor unit devices 6 can be installed in close contact with each other, and installation space can be saved. Furthermore, since the piping does not get in the way when the indoor unit device 6 is added or replaced, the indoor unit device 6 can be added and removed easily.
　また、この空気調和機１によれば、複数台の室内ユニット２、３を、室外ユニット４、５に対し並列に接続して、いわゆる多岐（マルチ）接続しているので、これら室内ユニット２、３の一方が故障等により万一運転停止した場合でも、その他方により運転を継続できる。このために、高価なサーバや通信機器等、情報処理機器等が温度上昇によりダウンすることを防止または低減できる。 Further, according to this air conditioner 1, since a plurality of indoor units 2, 3 are connected in parallel to the outdoor units 4, 5, so-called multi-connected (multi) connection, the indoor units 2, Even if one of the 3 stops due to a failure or the like, the other can continue the operation. For this reason, it is possible to prevent or reduce an information processing device such as an expensive server or communication device from being down due to a temperature rise.
　さらに、インナーダクト２４、２５は、室内熱交換器９、１０や水熱交換器２６、２７の横幅とほぼ同一の流路の断面を有する空気流路を形成するので、圧損を低減できる。すなわち、吸込口２１から室内ユニット２、３内に吸い込まれた空気が水熱交換器２６、２７、室内熱交換器９、１０を経て室内ファン１１、１２に至るまでの空気流路に、拡幅や縮小が発生すると圧損が発生するが、インナーダクト２４、２５はこの空気流路の断面の横幅を、室内、水熱交換器９、１０、２６、２７の横幅とほぼ同一に維持するので、圧損を低減できる。このために、室内ファン１１、１２の消費電力の節電を図ることができる。 Furthermore, since the inner ducts 24 and 25 form an air flow path having substantially the same cross section as the horizontal width of the indoor heat exchangers 9 and 10 and the water heat exchangers 26 and 27, pressure loss can be reduced. That is, the air sucked into the indoor units 2 and 3 from the suction port 21 is widened in the air flow path from the water heat exchangers 26 and 27 and the indoor heat exchangers 9 and 10 to the indoor fans 11 and 12. However, the inner ducts 24 and 25 maintain the width of the cross section of the air flow path substantially the same as the width of the indoor and water heat exchangers 9, 10, 26, and 27. Pressure loss can be reduced. For this reason, the power consumption of the indoor fans 11 and 12 can be saved.
　また、室内熱交換器９、１０で発生したドレンを受ける第１のドレンパン３１の受水口３２を室内熱交換器９、１０の下流側で、インナーダクト２４、２５の下部に設け、この受水口３２を有する第１のドレンパン３１の図中上面と排水口３３との高さを、室内ファン１１、１２の一次側の最大負圧よりも十分に低い負圧になるように形成している。 In addition, a water receiving port 32 of the first drain pan 31 that receives the drain generated in the indoor heat exchangers 9 and 10 is provided on the downstream side of the indoor heat exchangers 9 and 10 below the inner ducts 24 and 25. The upper surface of the first drain pan 31 having 32 and the drainage port 33 are formed so that the negative pressure is sufficiently lower than the maximum negative pressure on the primary side of the indoor fans 11 and 12.
　上記構成により、負圧差により、第１のドレンパン３１内のドレンを排水口３３から第２のドレンパン３５内へ強制的に排水可能となり、インナーダクト２４、２５の内底面にドレンが滞留することを低減できる。また、第２のドレンパン３５のドレンは外部ドレン排水口部３７から外部へ排水できる。さらに、万一、この外部ドレン排水口部３７に詰まりが発生した場合でも予備ドレン管３８により外部へ排水できる。 With the above configuration, the drain in the first drain pan 31 can be forcibly drained from the drain port 33 into the second drain pan 35 due to the negative pressure difference, and the drain is retained on the inner bottom surfaces of the inner ducts 24 and 25. Can be reduced. Further, the drain of the second drain pan 35 can be drained to the outside from the external drain drain port 37. Furthermore, even if the external drain outlet 37 is clogged, it can be drained to the outside by the preliminary drain pipe 38.
　さらにまた、室内熱交換器９、１０の空気流下流側にて、インナーダクト２４、２５の底面に、傾斜板３４を設けたので、室内、水熱交換器９、１０、２６、２７から空気流に乗って飛散する飛沫状のドレンを傾斜板３４により受けて、その下り傾斜面により第１のドレンパン３１に案内し排水できるので、インナーダクト２４、２５の内底面に滞留するドレンの低減を図ることができる。 Furthermore, since the inclined plate 34 is provided on the bottom surface of the inner ducts 24 and 25 on the downstream side of the air flow of the indoor heat exchangers 9 and 10, air flows from the indoor and water heat exchangers 9, 10, 26, and 27. Since the slanted plate 34 receives the splash-like drain that scatters on the flow and guides it to the first drain pan 31 by its downward inclined surface, it can be drained. Can be planned.
　また、適宜フリークーリング（ＦＣ）の水熱交換器２６、２７を追加し、併設できるので、冷凍サイクルを用いた空気調和機とＦＣによる水熱交換器とを別々に設置する場合に比して設置スペースの節約とコスト低減を図ることができる。 In addition, free cooling (FC) water heat exchangers 26 and 27 can be added as appropriate, so that the air conditioner using the refrigeration cycle and the FC water heat exchanger can be installed separately. The installation space can be saved and the cost can be reduced.
　図１０は上記室内ユニット２、３の変形例を示す平断面図である。この変形例は上記図３で示すインナーダクト２４、２５の室内ファン１１、１２側端部に、所要の直径に縮径する縮径部４５を形成したものであり、これ以外の構成は上記図３で示すインナーダクト２４、２５と同様の構成である。 FIG. 10 is a plan sectional view showing a modification of the indoor units 2 and 3. In this modification, a diameter-reduced portion 45 that is reduced to a required diameter is formed at the end of the inner ducts 24, 25 shown in FIG. 3 on the indoor fan 11, 12 side. The inner ducts 24 and 25 shown in FIG.
　この図１０で示すインナーダクト２４、２５によれば、室内ファン１１、１２をインナーダクト２４、２５に取り付ける平板状の取付板２４ａ、２５ａと、この取付板２４ａ、２５ａ側のインナーダクト２４、２５の一端とにより形成される角部に流入する空気流を縮径部４５により室内ファン１１、１２へスムースに案内することができるので、流路抵抗を低減できる。このために、室内ファン１１、１２の消費電力の節約を図ることができる。 According to the inner ducts 24 and 25 shown in FIG. 10, flat mounting plates 24a and 25a for attaching the indoor fans 11 and 12 to the inner ducts 24 and 25, and the inner ducts 24 and 25 on the mounting plates 24a and 25a side. Since the reduced diameter portion 45 can smoothly guide the airflow flowing into the corner formed by one end of the indoor fan 11 and 12, the flow resistance can be reduced. For this reason, the power consumption of the indoor fans 11 and 12 can be saved.
　図１２は上記空気調和機１の変形例の全体構成を示す模式図である。この変形例は上記図１で示す室内ユニット２と室内ユニット３が並列に接続されたマルチ接続ではなく、室内ユニット２と室内ユニット３が独立して室外ユニット４、５にそれぞれ接続された１対１の対応接続としたものである。この構成では、室内ユニット２、３が並列に接続されていないため、分岐管は不要となる。また、室外ユニット４、５もマルチ接続に対応した室外ユニットではなく、より安価な１対１接続用の室外ユニットを用いることができる。 FIG. 12 is a schematic diagram showing an overall configuration of a modification of the air conditioner 1. This modification is not a multi-connection in which the indoor unit 2 and the indoor unit 3 shown in FIG. 1 are connected in parallel, but a pair in which the indoor unit 2 and the indoor unit 3 are independently connected to the outdoor units 4 and 5, respectively. 1 corresponding connection. In this structure, since the indoor units 2 and 3 are not connected in parallel, a branch pipe becomes unnecessary. Also, the outdoor units 4 and 5 are not outdoor units that support multi-connection, and cheaper outdoor units for one-to-one connection can be used.
　上記図１２に示す空気調和機１によれば、さらにコスト低減を図ることができる。 The air conditioner 1 shown in FIG. 12 can further reduce costs.
　なお、上記実施態様においては、機械室２ｂ、３ｂに関し、室内ユニット２、３の上下方向に単に連通する連通空間に形成する場合について述べたが、本発明はこれに限定されるものではなく、例えば機械室２ｂ、３ｂ内を室内ユニット２、３に対応して上下方向に仕切る仕切り板を設け、この仕切り板に、冷媒配管１３や水配管等を貫通させる貫通孔を設けることにより、上下の機械室２ｂ、３ｂを連通させてもよい。また、これら連通孔の所要数をノックアウト孔により形成してもよい。 In the above embodiment, the machine rooms 2b and 3b have been described as being formed in a communication space that simply communicates in the vertical direction of the indoor units 2 and 3, but the present invention is not limited to this. For example, a partition plate that divides the machine chambers 2b and 3b in the vertical direction corresponding to the indoor units 2 and 3 is provided, and the partition plate is provided with a through-hole that penetrates the refrigerant pipe 13 and the water pipe, thereby The machine rooms 2b and 3b may be communicated. Further, the required number of these communication holes may be formed by knockout holes.
　図１３は上記空気調和機１の他の変形例の全体構成を示す模式図である。この変形例は上記図１で示す液側、ガス側配管接続部１７、１８を最下段の室内ユニット３の下面に設けたものであり、これ以外の構成は上記図１で示す室内ユニット装置６と同様の構成である。この図１３に示す空気調和機１においても設置スペースの節約によれば、さらにコスト低減を図ることができる。 FIG. 13 is a schematic diagram showing an overall configuration of another modification of the air conditioner 1. In this modification, the liquid side and gas side pipe connection portions 17 and 18 shown in FIG. 1 are provided on the lower surface of the lowermost indoor unit 3, and the other configuration is the indoor unit device 6 shown in FIG. 1. It is the same composition as. Also in the air conditioner 1 shown in FIG. 13, the cost can be further reduced by saving the installation space.
　以上、本発明の幾つかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、本発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、本発明の要旨を逸脱しない範囲で、種々の省略、置換え、変更を行なうことができる。これら実施形態やその変形は、本発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。 Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the present invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the present invention. These embodiments and modifications thereof are included in the scope and gist of the present invention, and are included in the invention described in the claims and the equivalents thereof.
　１…空気調和機、２、３…室内ユニット、２ｂ、３ｂ…機械室、４、５…室外ユニット、９、１０…室内熱交換器、１１、１２…室内ファン、１３…冷媒配管、１７…液側配管接続端部、１８…ガス側配管接続端部、２４、２５…インナーダクト（通風路）、２６、２７…水熱交換器、３１…第１ドレンパン、３２…受水口、３３…排水口、３４…傾斜板、３５…第２ドレンパン、３６…第３ドレンパン、３７…外部ドレン排水口部、３９…天板、４０ａ、４０ｂ…ロープガイド。 DESCRIPTION OF SYMBOLS 1 ... Air conditioner, 2, 3 ... Indoor unit, 2b, 3b ... Machine room, 4, 5 ... Outdoor unit, 9, 10 ... Indoor heat exchanger, 11, 12 ... Indoor fan, 13 ... Refrigerant piping, 17 ... Liquid side pipe connection end, 18 ... Gas side pipe connection end, 24, 25 ... Inner duct (ventilation path), 26, 27 ... Water heat exchanger, 31 ... First drain pan, 32 ... Receiving port, 33 ... Drainage Mouth, 34 ... inclined plate, 35 ... second drain pan, 36 ... third drain pan, 37 ... external drain drain port, 39 ... top plate, 40a, 40b ... rope guide.

Claims (6)

  1. それぞれに機械室を有する複数台の室内ユニットと少なくとも１台の室外ユニットとを有する空気調和機において、
    　前記複数台の室内ユニットを上下方向に重ねて複数段に形成し、これら室内ユニットの各機械室同士を上下方向に連通させ、前記室外ユニットの配管に接続する前記室内ユニットの配管接続端部を、前記複数段に重ねて配置された室内ユニットのうち最上段に位置する室内ユニットの上部に設けたこと、を特徴とする空気調和機。     In an air conditioner having a plurality of indoor units each having a machine room and at least one outdoor unit,
    A plurality of indoor units are stacked in the vertical direction to form a plurality of stages, the machine rooms of these indoor units communicate with each other in the vertical direction, and a pipe connection end of the indoor unit that connects to the pipe of the outdoor unit An air conditioner provided on an upper part of an indoor unit positioned at the uppermost stage among the indoor units arranged in a plurality of stages.
  2. 前記各室内ユニットは、それに設けた空気吸込口と空気吹出口を連通する通風路を備え、前記通風路内に、熱交換器及び前記熱交換器に空気を送風するファンを設け、前記熱交換器同士は前記機械室内で配管により並列に連結されていることを特徴とする請求項１記載の空気調和機。 Each indoor unit includes a ventilation path that communicates an air inlet and an air outlet provided in the indoor unit, and a heat exchanger and a fan that blows air to the heat exchanger are provided in the ventilation path, and the heat exchange The air conditioner according to claim 1, wherein the units are connected in parallel by piping in the machine room.
  3. 前記各室内ユニットは、前記熱交換器からのドレンを受ける第１ドレンパンをそれぞれ具備していることを特徴とする請求項２記載の空気調和機。 The air conditioner according to claim 2, wherein each of the indoor units includes a first drain pan that receives drain from the heat exchanger.
  4. 前記各室内ユニットは、前記第１ドレンパンと前記機械室内の配管からのドレンを受ける第２ドレンパンを具備していることを特徴とする請求項３記載の空気調和機。 4. The air conditioner according to claim 3, wherein each of the indoor units includes a second drain pan that receives drain from the first drain pan and piping in the machine room. 5.
  5. 前記最上段の室内ユニットの上端に天板を設け、前記天板に運搬用ロープを掛止させるロープガイドを形成したことを特徴とする請求項１ないし４のいずれか１項に記載の空気調和機。 The air conditioner according to any one of claims 1 to 4, wherein a top plate is provided at an upper end of the uppermost indoor unit, and a rope guide for hooking a transport rope to the top plate is formed. Machine.
  6. 前記室内ユニットの運転を停止させる場合に、前記空気吸込口を閉鎖するパネルを取付可能としたことを特徴とする請求項２ないし５項のいずれかに１項に記載の空気調和機。 6. The air conditioner according to claim 2, wherein when the operation of the indoor unit is stopped, a panel for closing the air suction port can be attached.
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