EP1956307A1 - Unite exterieure pour conditionneur d'air - Google Patents

Unite exterieure pour conditionneur d'air Download PDF

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Publication number
EP1956307A1
EP1956307A1 EP06822483A EP06822483A EP1956307A1 EP 1956307 A1 EP1956307 A1 EP 1956307A1 EP 06822483 A EP06822483 A EP 06822483A EP 06822483 A EP06822483 A EP 06822483A EP 1956307 A1 EP1956307 A1 EP 1956307A1
Authority
EP
European Patent Office
Prior art keywords
fan
outdoor unit
air conditioner
outdoor
spaced away
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP06822483A
Other languages
German (de)
English (en)
Other versions
EP1956307B1 (fr
EP1956307A4 (fr
Inventor
Keiji Ishida
Tadashi Sao
Ikuji Ishii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Publication of EP1956307A1 publication Critical patent/EP1956307A1/fr
Publication of EP1956307A4 publication Critical patent/EP1956307A4/fr
Application granted granted Critical
Publication of EP1956307B1 publication Critical patent/EP1956307B1/fr
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Classifications

    • 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
    • F24F1/38—Fan details of outdoor units, e.g. bell-mouth shaped inlets or fan mountings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/705—Adding liquids
    • 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
    • F24F1/40—Vibration or noise prevention at outdoor 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
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/46—Component arrangements in separate outdoor units
    • F24F1/48—Component arrangements in separate outdoor units characterised by air airflow, e.g. inlet or outlet airflow
    • F24F1/50—Component arrangements in separate outdoor units characterised by air airflow, e.g. inlet or outlet airflow with outlet air in upward direction
    • 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
    • F24F1/56—Casing or covers of separate outdoor units, e.g. fan guards
    • 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
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards
    • 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units

Definitions

  • the present invention relates to an outdoor unit of an air conditioner. More specifically, the present invention relates to a type of outdoor unit of an air conditioner that blows out air from a ceiling.
  • a conventional type of outdoor unit of an air conditioner that blows out air from a ceiling includes an air discharge port formed on a top panel of a casing, and a fan guard (also called a fan grille) is disposed so as to cover the air discharge port (for example, see Patent Document 1).
  • a fan guard also called a fan grille
  • the fan guard mounted so as to cover the air discharge port disposed with an impeller of the fan becomes a resistance at the time of air blowing, causing a pressure loss.
  • pressure loss is reduced as much as possible, it is possible to increase the air volume by a corresponding amount.
  • a purpose of the present invention is to provide an outdoor unit capable of reducing pressure loss due to the presence of a fan guard and improving the performance of an air conditioner.
  • An outdoor unit of an air conditioner includes a fan, an air discharge port, and a fan guard.
  • the air discharge port is an opening for discharging air blown out from the fan to the outside.
  • the fan guard covers the air discharge port and includes a spaced away portion disposed away from the fan by a distance greater than the length of a test finger.
  • the spaced away portion has a first opening formed therein into which the test finger can be inserted.
  • a resin fan guard With a conventional outdoor unit of an air conditioner, a resin fan guard has a large number of slits formed therein through which air passes. The maximum width of each slit is limited to be below 12 mm so as to prevent the test finger from being inserted.
  • the fan guard is provided with the spaced away portion at a position away from the fan by a distance greater than the length of the test finger. With such spaced away portion, even when a finger is inserted therein, the finger tip is prevented from touching the rotating fan.
  • the first opening at the spaced away portion is formed large (wide width) enough for the test finger to be inserted therein.
  • the first opening of a large size is formed at the spaced away portion of the fan guard.
  • An outdoor unit of an air conditioner according to a second aspect of the present invention is the outdoor unit according to the first aspect of the present invention, wherein the spaced away portion is disposed away from the fan by 80 mm or more, and the minimum width of the first opening of the spaced away portion is 12 mm or more.
  • An outdoor unit of an air conditioner according to a third aspect of the present invention is the outdoor unit according to the first or second aspect of the present invention, wherein the spaced away portion is disposed away from the fan by 100 mm or more, and the minimum width of the first opening of the spaced away portion is 15 mm or more.
  • An outdoor unit of an air conditioner according to a fourth aspect of the present invention is the outdoor unit according to any one of the first through third aspects of the present invention, wherein the fan guard further includes a near-fan portion that is closer to the fan than the spaced away portion is. Also, the near-fan portion has a second opening formed therein into which the test finger cannot be inserted.
  • the near-fan portion is also provided with the second opening whose size is small (narrow width) enough to prevent the test finger from being inserted therein. Accordingly, it is possible to further reduce pressure loss.
  • An outdoor unit of an air conditioner according to a fifth aspect of the present invention is the outdoor unit according to the fourth aspect of the present invention, wherein the maximum width of the second opening is smaller than 12 mm.
  • An outdoor unit of an air conditioner according to a sixth aspect of the present invention is the outdoor unit according to the fourth or fifth aspect of the present invention, wherein the spaced away portion faces the air discharge port. Also, the near-fan portion extends toward the periphery of the air discharge port from the periphery of the spaced away portion.
  • the spaced away portion facing the air discharge port is disposed sufficiently away from the fan. Also, within the portion which prevents the contact with the fan between the spaced away portion and the peripheral portion of air discharge port, the near-fan portion which is close to the fan is disposed with the second opening so as to reduce pressure loss while securing the safety.
  • the distance between the spaced away portion and the fan should be equal to or smaller than 500 mm, preferably equal to or smaller than 300 mm.
  • the minimum width of the first opening of the spaced away portion should be equal to or smaller than 60 mm, preferably equal to or smaller than 50 mm.
  • the second opening whose maximum width is set to be smaller than 12 mm so as to prevent the finger from being inserted therein, when such maximum width is too small, the air resistance by the near-fan portion becomes large, and thus the maximum width should be equal to or greater than 3 mm, preferably equal to or greater than 5 mm.
  • the present invention it is possible to reduce the pressure loss due to the presence of the fan guard while ensuring a safety function by the fan guard to prevent the contact with the fan, thus improving the performance of the air conditioner compared to the conventional air conditioner.
  • FIG. 1 shows a refrigerant circuit diagram of an air conditioner including an outdoor unit according to an embodiment of the present invention.
  • An air conditioner 1 is a multi-type air conditioner to be used in a building, and has a structure in which a plurality of indoor units 3 are connected in parallel to one or a plurality of outdoor units 2.
  • a refrigerant circuit 10 of the air conditioner 1 mainly includes a compressor 11, a four way switching valve 12, an outdoor heat exchanger 13, an outdoor expansion valve 14, an indoor expansion valve 15, and an indoor heat exchanger 16, which are sequentially connected, constituting a vapor compression refrigeration cycle.
  • the compressor 11, the four way switching valve 12, the outdoor heat exchanger 13, and the outdoor expansion valve 14 are included in each outdoor unit 2, and the indoor expansion valve 15 and the indoor heat exchanger 16 are included in each indoor unit 3.
  • the four way switching valve 12 and the indoor heat exchanger 16 are connected by a gas-side refrigerant communication pipe 17a
  • the outdoor expansion valve 14 and the indoor expansion valve 15 are connected by a liquid-side refrigerant communication pipe 17b.
  • the refrigerant communication pipes 17a, 17b are disposed between the outdoor unit 2 and the indoor unit 3.
  • an accumulator and other auxiliary components are also provided in the outdoor unit 2.
  • a gas-side shut-off valve 18 and a liquid-side shut-off valve 19 are provided at a terminal portion of the refrigerant circuit inside of the outdoor unit 2.
  • the gas-side shut-off valve 18 is disposed on the four way switching valve 12 side, and the liquid-side shut-off valve 19 is disposed on the outdoor expansion valve 14 side.
  • the gas-side refrigerant communication pipe 17a is connected to the gas-side shut-off valve 18, and the liquid-side refrigerant communication pipe 17b is connected to the liquid-side shut-off valve 19.
  • shut-off valves 18, 19 are put into an opened state.
  • the refrigerant circuit of the air conditioner 1 shown in Figure 1 is a simplified drawing of an actual circuit.
  • a capacity variable compressor whose rotation speed is controlled by an inverter (hereinafter referred to as an inverter compressor) and a fixed capacity compressor which is on/off controlled (hereinafter referred to as a fixed capacity compressor) are often used in combination.
  • a 5-horsepower (HP) unit as shown in Figure 2(a)
  • an 8, 10, 12-horsepower unit as shown in Figure 2(b) and a 14, 16, 18-horsepower unit as shown in Figure 2(c) are provided as the outdoor units 2.
  • the unit in Figure 2(a) houses one inverter compressor
  • the unit in Figure 2(b) houses one inverter compressor and one fixed capacity compressor
  • the unit in Figure 2(c) houses one inverter compressor and two fixed capacity compressors.
  • an electric wire of the inverter compressor and an electric wire of the fixed capacity compressor are bound together at a crossing portion by a tie wrap.
  • each outdoor unit 2 is provided with an outdoor fan 29 that blows air to the outdoor heat exchanger 13 and promotes heat exchange between refrigerant and air (see Figure 2 ).
  • the outdoor fan 29 the outdoor unit 2 shown in Figure 2(a) uses a fan with a diameter of 680 mm having four blades instead of the conventional fan with a diameter of 700 mm having three blades (see Figure 8 ), and the outdoor unit 2 shown in Figure 2(c) uses a double fan with a diameter of 540 mm having three blades instead of the fan with a diameter of 700 mm having three blades (see Figure 9 ).
  • optimization of the fan is performed for each casing.
  • the blade area is made larger than that of the conventional fan by 20 - 25%.
  • the blade pitch is made irregular and thereby the NZ noise is reduced and the noise level is reduced by approximately 1 dB.
  • the four way switching valve 12 is held in a state shown by the solid lines in Figure 1 .
  • a high-temperature high-pressure gas refrigerant discharged from the compressor 11 flows into the outdoor heat exchanger 13 via the four way switching valve 12, exchanges heat with outdoor air, and becomes condensed/liquefied.
  • the liquefied refrigerant passes through the outdoor expansion valve 14 in a fully opened state, and flows into each indoor unit 3 via the liquid-side refrigerant communication pipe 17b.
  • the pressure of the refrigerant is reduced to a predetermined low pressure in the indoor expansion valve 15. Further, the refrigerant exchanges heat with indoor air in the indoor heat exchanger 16 and becomes evaporated.
  • the indoor air that is cooled by the evaporation of the refrigerant is blown out into the room by an indoor fan (not shown), and cools the room.
  • the refrigerant that is evaporated and gasified in the indoor heat exchanger 16 returns to the outdoor unit 2 via the gas-side refrigerant communication pipe 17a and is sucked into the compressor 11.
  • the four way switching valve 12 is held in a state shown by the dashed lines in Figure 1 .
  • a high-temperature high-pressure gas refrigerant discharged from the compressor 11 flows into the indoor heat exchanger 16 of each indoor unit 3 via the four way switching valve 12, exchanges heat with indoor air, and becomes condensed/liquefied.
  • the indoor air that is heated by the condensation of the refrigerant is blown out into the room by the indoor fan and heats the room.
  • the refrigerant liquefied in the indoor heat exchanger 16 returns to the outdoor unit 2 from the indoor expansion valve 15 in a fully opened state via the liquid-side refrigerant communication pipe 17b.
  • the pressure of the refrigerant that returned to the outdoor unit 2 is reduced to a predetermined pressure in the outdoor expansion valve 14. Further, the refrigerant exchanges heat with outdoor air in the outdoor heat exchanger 13, and becomes evaporated. Then, the refrigerant that is evaporated and gasified in the outdoor heat exchanger 13 is sucked into the compressor 11 via the four way switching valve 12.
  • the indoor expansion valve 15 of the indoor unit 3 during non-operation is in a closed state, and hardly any refrigerant flows in the indoor heat exchanger 16 of such indoor unit 3.
  • Figure 3 is an external view of the outdoor unit 2 having the double outdoor fan 29 shown in Figure 2(c) .
  • Figure 4 is a perspective view of the outdoor unit 2 with the casing and the outdoor fan 29 removed.
  • Figure 5 is a plan view of the outdoor unit 2 viewed from the center in a height direction.
  • the drawings of the shut-off valves 18, 19 are omitted.
  • the drawings of the refrigerant pipe and the like inside are also omitted.
  • Support pillars 51, 52, 53, and 54 are integrally formed with support pillars 51, 52, 53, and 54.
  • a front plate 21 of the casing is mounted to the outside of the support pillars 52, 53.
  • four support pillars 51 to 54 that vertically extend are mutually connected by a bottom frame 61 in the vicinity of the lower end, and a cross stay 62 and a motor support table 63 at the upper portion.
  • the motor support table 63 is equipped with a motor 70 having an impeller shown in Figure 2(b) which drives the outdoor fan 29.
  • a top panel 24 shown by the two-dot chain lines in Figure 7 is disposed at a position which is immediately above and around a bellmouth 29a (a member which, along with the top panel 24, forms the air discharge port of the outdoor unit 2) disposed around the impeller of the outdoor fan 29.
  • the outer periphery of the top panel 24 is fixed to the support pillars 51, 52, 53, and 54 or the side plates 22 and the back plate 23.
  • a circular hole that corresponds to the bellmouth 29a is opened in the top panel 24, and an inner circumferential end that forms the circular hole is bent upward.
  • the bottom frame 61 supports the compressor 11, the outdoor heat exchanger 13, and the like, and fulfills a role for fixing the shut-off valves 18, 19 via a mounting structure 64.
  • the bottom frame 61 has an opening at a portion below the shut-off valves 18, 19.
  • the gas-side shut-off valve 18 and the liquid-side shut-off valve 19 of the outdoor unit 2 are arranged side by side. Further, a direction of arrangement of the gas-side shut-off valve 18 and the liquid-side shut-off valve 19 is approximately 45 degrees with respect to both of the front plate 21 and the side plates 22 of the casing.
  • the gas-side shut-off valve 18 and the liquid-side shut-off valve 19 are arranged separately, and at the same time, they are offset in a left-right direction (direction along the front plate 21) and are also offset in a front-back direction (direction along the side plates 22). Accordingly, the pipes can be easily pulled out in a front-back direction and also in a left-right direction.
  • lagging the refrigerant communication pipes 17a, 17b (winding a thermally insulated tape around the both pipes or covering the both pipes with a decorative metal plate) can be easily performed, and the thickness of the pipes can be made thin, which improves the appearance.
  • both of a pipe connection port 18a of the gas-side shut-off valve 18 and a pipe connection port 19a of the liquid-side shut-off valve 19 face downward in the same manner.
  • the structures of the shut-off valves 18, 19 are simplified.
  • the shut-off valves 18, 19 do not have a conventional structure in which they are joined to the refrigerant communication pipes 17a, 17b with a flare nut or a flange, but have a structure in which brazing (a metal are joined to a metal by using wax with heat) can be performed. Accordingly, when performing the joining work of the shut-off valves 18, 19 and the refrigerant communication pipes 17a, 17b onsite, there is no need for a screw tightening work. Thus, the construction performance is improved and the possibility of refrigerant leakage can be reduced.
  • a fan guard 30 is a three-dimensional integrated grille of a low carbon steel wire, and the entire surface thereof is coated with a resin coating.
  • the strength is increased compared to a conventional resin grille, and the load capacity is 60 kgf.
  • the blow out area is larger compared to the conventional resin grille.
  • the fan guard 30 is formed by a steel wire with a diameter of 2.0 mm and a steel wire with a diameter of 3.5 mm, and a crossing portion is welded.
  • the fan guard 30 is formed by a spaced away portion 31 in a quadrilateral shape which is approximately 110 mm away from the outdoor fan 29 in a height direction, and a lateral side portion 32 that surrounds a gap between the spaced away portion 31 and the top panel 24 in a height direction.
  • a dimension H1 in Figure 7 is 110 mm.
  • portions that extend diagonally downward from the four sides of the spaced away portion 31 are near-fan portions 32a that are relatively close to the outdoor fan 29.
  • connecting portions 32b are formed between the four near-fan portions 32a of the lateral side portion 32.
  • four members 34 whose lower portions extend from the spaced away portion 31 to be in contact with the top panel 24 through the connecting portion 32b are welded to the spaced away portion 31 and the connecting portion 32b. Lower portions 34a of these four members 34 are screwed to the top panel 24.
  • steel wires 33 that are also members that constitute the spaced away portion 31 and the near-fan portions 32a extend downward so as to be inserted in a hole (not shown) in the top panel 24 as shown in Figure 7 .
  • the spaced away portion 31 has a large number of first openings OP1 formed therein by a steel wire in a grid pattern.
  • the width of the narrow side of each first opening OP 1 is equal to or greater than 20 mm.
  • a pitch P1 of the steel wire that forms the first openings OP1 is 22 mm and the diameter of the steel wire is 2 mm. Therefore, the width of each first opening OP 1 is 20 mm.
  • the size of the first opening OP 1 is such that a test finger 100 shown in Figure 12 can be inserted therein. However, it is not large enough for a person to insert his hand therein, and the spaced away portion 31 is away from the outdoor fan 29 by 100 mm or more. Thus, a person is prevented from touching the rotating outdoor fan 29 with his fingertip.
  • the size of a second opening OP2 formed in each near-fan portion 32a of the lateral side portion 32 is limited to a small size, in view of that the distance between a portion of the near-fan portion 32a closest to the outdoor fan 29 and the outdoor fan 29 is less than 50 mm.
  • a steel wire pitch P2 on the narrow side of the steel wire in a grid pattern is 11 mm, and consequently the width of the second opening OP2 is reduced to approximately 9 mm. Accordingly, a situation where the test finger 100 shown in Figure 12 penetrates through the second opening OP2 and reaches the outdoor fan 29 is avoided.
  • the connecting portions 32b of the lateral side portion 32 are further away from the outdoor fan 29 than the near-fan portions 32a are, but the steel wire pitch is set in accordance with the steel wire pitch of the near-fan portions 32a.
  • the test finger 100 mainly includes a stop plate 101 in a circular disk shape, a first cylindrical portion 102 extending from the stop plate 101, a second cylindrical portion 103 extending from the first cylindrical portion 102, and a false fingertip portion 104 extending from the second cylindrical portion 103, and two joint portions are formed so as to be bent at a predetermined angle.
  • the spaced away portion 31 is provided at a position away from the outdoor fan 29 (a position approximately 110 mm away) by a distance longer than the length of the test finger 100 (80 mm).
  • a person is prevented from touching the rotating outdoor fan 29 with his fingertip even if he inserts his finger. Consequently, each first opening OP1 of the spaced away portion 31 is formed to be large enough for the test finger 100 to be inserted (i.e., the width of the narrow side is equal to or greater than 20 mm).
  • the lateral side portion 32 that surrounds the gap between the spaced away portion 31 and the top panel 24 in a height direction also has an opening formed therein for air ventilation, which is small enough to prevent a person from inserting his finger. With this opening, resistance against airflow blown out upward from the bellmouth 29a is reduced as much as possible. Also in this manner, pressure loss due to the presence of the fan guard 30 is reduced.
  • the air conditioner 1 in which the fan guard 30 is adopted can increase the air volume and raise the static pressure by the outdoor fan 29, thus significantly improving the performance. Specifically, pressure loss due to the fan guard 30 is reduced to half or less, compared to the case where the conventional fan guard in which a person cannot insert his finger in any portion and which covers the air discharge port in a manner adjacent to the outdoor fan is used.
  • a control board 42 disposed inside of a switch box 41 (see Figure 4 ) arranged on the back of the front plate 21.
  • a plurality of push buttons 43 are provided on the control board 42.
  • a display unit 45 which is a display capable of performing high luminance display is provided at the front plate 21 of the outdoor unit 2.
  • This display unit 45 is formed by two display plates disposed above and below, which can display three digit numbers (see Figure 11 ).
  • This air conditioner 1 is configured such that, a pressure sensor and an electronic pressure gauge of brazed type are installed when a pressure gauge is installed as an option, unlike a conventional manner in which a Bourdon tube pressure gauge is connected to a gauge port of a refrigerant pipe with a flare. A pressure measured by such electronic pressure gauge with high precision is displayed on the display unit 45 along with the temperature of refrigerant.
  • the air conditioner 1 is equipped with an automatic refrigerant charging operation function.
  • refrigerant can be charged to obtain an appropriate amount with a high precision of 500 grams.
  • a refrigerant canister is connected to a charging port and one of the push buttons 43 on the control board 42 is pressed, the automatic refrigerant charging operation is started, and the operation automatically stops when the appropriate amount is added.
  • the canister becomes empty, a display indicating an "empty" state appears on the display unit 45.
  • the air conditioner 1 is equipped with an automatic test run function that is performed after the automatic refrigerant charging operation.
  • an automatic test run function that is performed after the automatic refrigerant charging operation.
  • the air conditioner 1 is equipped with a refrigerant leakage detection operation function.
  • the refrigerant leakage detection has a precision of 500 grams, and the refrigerant leakage detection operation is started when one of the push buttons 43 on the control board 42 is pressed.
  • the push button 43 When the push button 43 is pressed, all the indoor units 3 automatically start cooling operation, detect the amount of refrigerant leakage within approximately 30 minutes, and stop the operation. Then, a display by LED on the control board 42 is performed or an indicator is displayed on the display unit 45. Also, for example, when only 0.6 kg of refrigerant has leaked from the initial charging amount of refrigerant, a number "0.6" is displayed on the display unit 45.
  • the air conditioner 1 starts an automatic diagnostic operation when one of the push buttons 43 on the control board 42 is pressed.
  • This automatic diagnostic operation contributes to acceleration of inspection work, and enables quick diagnostics of problems.
  • the automatic diagnostic operation helps to guess where the problems are, such as unplugged connectors and malfunction of a thermistor, solenoid valve, and motor-operated expansion valve, compressor failure, a communication error between the outdoor units 2 and the indoor units 3, and the like.
  • the automatic diagnostic operation can be used for checking whether or not maintenance work was appropriate, by performing the automatic diagnostic operation after repair and checking.
  • unexpected maintenance failure such as that a thermistor is erroneously mounted and the like can be prevented.
  • the pair of motor support tables 63 preferably has a structure in which the resistance against the airflow from down to up is reduced.
  • each motor support table 63 that extends across the cross stays 62 in Figure 4 , a channel member 63a whose cross section is in an angular U-shape is used, and a member 63b to make the lower surface of the channel member 63a into a downward convex shape is welded to the channel member 63a.
  • Each motor support table 63 formed by the channel member 63a and the member 63b has a cross section as shown in Figure 13 .
  • the cross sectional view has a downward convex shape in which the center of the lower surface protrudes further downward than the both ends. Accordingly, the airflow flowing from down to up becomes as indicated by arrow A1 in Figure 13 , and the resistance from the motor support table 63 is reduced.
  • the shape of the lower surface of the motor support table 63 is not limited to the inverted triangular cross sectional shape shown in Figure 13 .
  • the lower surface of the member 63a may be in a circular arc shape.
  • the mounting structure 64 that extends upward from the bottom frame 61 and supports the shut-off valves 18, 19 preferably has a gate shape.
  • the mounting structure 64 is formed by a pair of pillars 91, 91 that extend upward from the bottom frame 61 and a horizontal beam 92 that connects upper end portions of the pillars 91, 91.
  • a concave-convex pattern is formed or the drawing process is performed on the pillars 91, 91 and the horizontal beam 92 in order to ensure the strength of each of them.
  • the horizontal beam 92 is used to support the shut-off valves 18, 19, and an opening OP3 is formed below the shut-off valves 18, 19. Accordingly, when performing brazing below the shut-off valves 18, 19 to join the refrigerant communication pipes 17a, 17b to each other, a space for such work can be secured.
  • the horizontal beam 92 is preferably provided in two types so as to be capable of supporting an exclusive component 99 in the case of an air conditioner for simultaneous heating and cooling.
  • the outdoor unit 2 of the air conditioner 1 is preferably configured, in case of a breakdown, such that operation data (high pressure, low pressure, various setting values, subcool, and the like) ten minutes before the occurrence of a breakdown is stored in a memory in the switch box 41.
  • operation data high pressure, low pressure, various setting values, subcool, and the like
  • data can be analyzed in detail after the breakdown, and the cause of the breakdown can be determined, which allows a countermeasure to be easily taken and the cause of the breakdown to be easily removed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Other Air-Conditioning Systems (AREA)
EP06822483.1A 2005-11-01 2006-10-27 Unité extérieure pour conditionneur d'air Not-in-force EP1956307B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2005318921 2005-11-01
JP2006042557A JP4323489B2 (ja) 2005-11-01 2006-02-20 空気調和装置の室外ユニット
PCT/JP2006/321522 WO2007052560A1 (fr) 2005-11-01 2006-10-27 Unite exterieure pour conditionneur d'air

Publications (3)

Publication Number Publication Date
EP1956307A1 true EP1956307A1 (fr) 2008-08-13
EP1956307A4 EP1956307A4 (fr) 2013-03-06
EP1956307B1 EP1956307B1 (fr) 2014-06-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06822483.1A Not-in-force EP1956307B1 (fr) 2005-11-01 2006-10-27 Unité extérieure pour conditionneur d'air

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EP (1) EP1956307B1 (fr)
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EP2549194A1 (fr) * 2011-07-19 2013-01-23 Sanyo Electric Co., Ltd. Grille de protection pour ventilateur et climatiseur comprenant une telle grille de protection
FR3013807A1 (fr) * 2013-11-28 2015-05-29 Air Liquide Dispositif de ventilation pour echangeur frigorifique avec grille de protection deportee
EP3252387A1 (fr) * 2016-05-31 2017-12-06 Fujitsu General Limited Unité extérieure pour climatiseur
WO2019114945A1 (fr) * 2017-12-13 2019-06-20 Electrolux Appliances Aktiebolag Unité extérieure de climatiseur
CN112097329A (zh) * 2020-07-17 2020-12-18 郑博文 一种智能空调室外机保护罩
US11435110B2 (en) 2016-05-27 2022-09-06 Electrolux Appliances Aktiebolag Air conditioner with window connection
US11566815B2 (en) 2017-12-13 2023-01-31 Electrolux Appliances Aktiebolag Installation device for split air-conditioner
US11841148B2 (en) 2017-12-13 2023-12-12 Electrolux Appliances Aktiebolag Window-type air conditioner
US11879647B2 (en) 2021-12-22 2024-01-23 Electrolux Appliances Aktiebolag Portable air conditioning unit window installation system

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KR101298372B1 (ko) * 2007-10-31 2013-08-20 엘지전자 주식회사 공기조화기의 실외기
JP4896912B2 (ja) * 2008-03-24 2012-03-14 富士フイルム株式会社 乾燥装置及び画像形成装置
JP2010101592A (ja) * 2008-10-27 2010-05-06 Mitsubishi Electric Corp 空気調和機の室外機
JP5289200B2 (ja) * 2009-06-19 2013-09-11 三菱電機株式会社 空気調和機用室外機
JP5402987B2 (ja) * 2011-05-20 2014-01-29 ダイキン工業株式会社 冷凍装置の室外ユニット
US20130167871A1 (en) * 2011-08-24 2013-07-04 Peco Corporation Car Wash Air Dryer Blower Flow Restrictor Arrangement And Method
JP5441981B2 (ja) * 2011-10-26 2014-03-12 三菱電機株式会社 空気調和機の室内機
US9322561B2 (en) * 2012-02-17 2016-04-26 Mitsubishi Electric Corporation Air-conditioning apparatus and configuration of installation of same
US9599118B2 (en) 2013-04-04 2017-03-21 Trane International Inc. System and method for controlling a system that includes fixed speed and variable speed compressors
DE102015109611A1 (de) * 2015-06-16 2016-12-22 Aht Cooling Systems Gmbh Kühlregal
JP6495860B2 (ja) * 2016-04-21 2019-04-03 ダイキン工業株式会社 熱源ユニット
US20180031266A1 (en) 2016-07-27 2018-02-01 Johnson Controls Technology Company Interactive outdoor display
JP6281619B1 (ja) 2016-09-29 2018-02-21 ダイキン工業株式会社 熱源ユニット
KR102147693B1 (ko) * 2016-10-28 2020-08-25 미쓰비시덴키 가부시키가이샤 공기 조화기
USD898884S1 (en) * 2019-06-03 2020-10-13 Bard Manufacturing Company, Inc. Frame for HVAC unit
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Cited By (10)

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Publication number Priority date Publication date Assignee Title
EP2549194A1 (fr) * 2011-07-19 2013-01-23 Sanyo Electric Co., Ltd. Grille de protection pour ventilateur et climatiseur comprenant une telle grille de protection
FR3013807A1 (fr) * 2013-11-28 2015-05-29 Air Liquide Dispositif de ventilation pour echangeur frigorifique avec grille de protection deportee
US11435110B2 (en) 2016-05-27 2022-09-06 Electrolux Appliances Aktiebolag Air conditioner with window connection
EP3252387A1 (fr) * 2016-05-31 2017-12-06 Fujitsu General Limited Unité extérieure pour climatiseur
WO2019114945A1 (fr) * 2017-12-13 2019-06-20 Electrolux Appliances Aktiebolag Unité extérieure de climatiseur
US11519615B2 (en) 2017-12-13 2022-12-06 Electrolux Appliances Aktiebolag Outdoor unit of an air conditioner
US11566815B2 (en) 2017-12-13 2023-01-31 Electrolux Appliances Aktiebolag Installation device for split air-conditioner
US11841148B2 (en) 2017-12-13 2023-12-12 Electrolux Appliances Aktiebolag Window-type air conditioner
CN112097329A (zh) * 2020-07-17 2020-12-18 郑博文 一种智能空调室外机保护罩
US11879647B2 (en) 2021-12-22 2024-01-23 Electrolux Appliances Aktiebolag Portable air conditioning unit window installation system

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KR100948776B1 (ko) 2010-03-24
US20090277205A1 (en) 2009-11-12
JP2007147248A (ja) 2007-06-14
AU2006309888A1 (en) 2007-05-10
EP1956307B1 (fr) 2014-06-25
JP4323489B2 (ja) 2009-09-02
KR20080066038A (ko) 2008-07-15
AU2006309888B2 (en) 2009-12-10
EP1956307A4 (fr) 2013-03-06
WO2007052560A1 (fr) 2007-05-10

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