EP1930663B9 - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
EP1930663B9
EP1930663B9 EP07023472.9A EP07023472A EP1930663B9 EP 1930663 B9 EP1930663 B9 EP 1930663B9 EP 07023472 A EP07023472 A EP 07023472A EP 1930663 B9 EP1930663 B9 EP 1930663B9
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
indoor
air conditioner
indoor unit
air
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.)
Active
Application number
EP07023472.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1930663A2 (en
EP1930663B1 (en
EP1930663A3 (en
Inventor
Tadashi Saito
Seiji Hirakawa
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP1930663A2 publication Critical patent/EP1930663A2/en
Publication of EP1930663A3 publication Critical patent/EP1930663A3/en
Publication of EP1930663B1 publication Critical patent/EP1930663B1/en
Application granted granted Critical
Publication of EP1930663B9 publication Critical patent/EP1930663B9/en
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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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0025—Cross-flow or tangential fans
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0057—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in or on a wall
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • 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
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0071—Indoor units, e.g. fan coil units with means for purifying supplied air
    • F24F1/0073—Indoor units, e.g. fan coil units with means for purifying supplied air characterised by the mounting or arrangement of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving

Definitions

  • the present invention relates to an air conditioner, and more specifically to an indoor unit.
  • a conventional air conditioner including an indoor unit with dimensions of 360 mm in height and 150 mm in depth, wherein a cross flow fan is 86 mm in diameter, and the number of stages in an indoor heat exchanger is 14 (For example, refer to the Japanese Examined Patent Publication No. 7-30926 (second paragraph, and Fig. 1 ).
  • air conditioners have become larger in dimension and weight.
  • air conditioners having a configuration in which one wall-hung type indoor unit and one outdoor unit are connected through a refrigerant pipe is a mainstream of the air conditioners for household use, whose regulation value according to Energy Conservation Law (Law concerning the Rational Use of Energy) is high among air conditioners.
  • Air conditioners with high energy-saving performance have a tendency to grow in size, and an outer dimension of the outdoor unit and a horizontal width and a vertical width of the indoor unit have a tendency to increase in size.
  • a 3.5-sun column (a column with a dimension of about 106.75 mm, where "sun” is one of the units in Shaku-Kan system) is often used, so that a horizontal width of a space of the wall surface whereon the indoor unit for air conditioner can be installed is approximately 800 mm.
  • US 2002/0172588 A1 discloses an air conditioning apparatus which provides a favorable atmosphere. It is provided with an impeller which is formed by a plurality of vanes and a ring for supporting the plurality of vanes. It includes a nozzle portion formed by a stabilizer and an air outset, a cross-flow fan formed by a guide wall and a heat exchanger. The ratio of the outside diameter of the impeller to the heat of the air conditioning apparatus is 2.2 or above and 3.0 or below.
  • GB 2 360 840 A discloses an air conditioner having two front panels forming a front phase of an oblong cabinet having a fan, heat exchanger and detachable air filter arranged inside the cabinet.
  • the front panels are supported pivotably in a horizontal direction and detachably from the outside ends of the cabinet.
  • EP 1 326 055 A1 discloses an air conditioner with an indicator panel for indicating its operation status.
  • the indicator panel has a half-mirror film formed on its surface so that only a pattern illuminated by a light source provided inside is made visually recognizable.
  • EP 1 632 725 discloses an air conditioner upon which the preamble of appending claim 1 is based.
  • the present invention aims to solve the above-mentioned problems, which intends to define a size of an indoor unit for air conditioner in consideration of an installation space for an air conditioner in houses in recent years, to realize a high energy-saving performance (under APF standard) with size constraints due to a shape and a structure of the indoor unit, and to lighten the burden on the environment by reducing the material usage and promoting recycling.
  • Fig. 1 is a refrigerant circuit diagram of an air conditioner according to the present invention.
  • a refrigeration cycle is formed by sequentially connecting a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an expansion mechanism 4 (electronically-controlled expansion valve), and an indoor heat exchanger 5.
  • an outdoor blower 6 propeller fan
  • An indoor blower 7 cross flow fan
  • the indoor heat exchanger 5 is provided.
  • a compressed high temperature and pressure refrigerant blows out from the compressor 1 and flows into the outdoor heat exchanger 3 via the four-way valve 2.
  • outdoor air is heat exchanged while the outdoor air is made to pass through between fins and tubes (heat transfer tubes) in the outdoor heat exchanger 3 by the outdoor blower 6 installed in the air flow path of the outdoor heat exchanger 3, while the refrigerant is cooled to a high pressure liquid state, and the outdoor heat exchanger 3 acts as a condenser.
  • the refrigerant passes through the expansion mechanism 4 and is reduced the pressure to a low-pressure two-phase refrigerant, and then flows into the indoor heat exchanger 5.
  • indoor air is made to pass through between fins and tubes (heat transfer tubes) in the indoor heat exchanger 5 by driving the indoor blower 7 in the air flow path wherein the indoor heat exchanger 5 is installed, and exchanges heat with the refrigerant.
  • This makes air blown out into an indoor space to be cooled, while the refrigerant to receive heat from air and to evaporate to a gas state (the indoor heat exchanger 5 acts as an evaporator).
  • the refrigerant returns to the compressor 1 and circulates so that the air is conditioned in the indoor space.
  • the four-way valve 2 is reversed, so that the refrigerant flows in an opposite direction to the above in the refrigeration cycle.
  • the indoor heat exchanger 5 acts as a condenser and the outdoor heat exchanger 3 act as an evaporator to warm indoor air.
  • Fig. 2 is a transverse sectional view of the indoor unit for air conditioner according to the first embodiment of the present invention.
  • Fig. 3 is a front view of the air conditioner according to the first embodiment of the present invention.
  • the indoor heat exchanger 5 housed inside the indoor unit cools and warms air suctioned from a suction opening 17, which is composed of heat transfer tubes penetrating through radiation fins provided in a laminated manner at certain intervals.
  • the indoor heat exchanger 5 composes a part of a refrigeration cycle including the compressor and the expansion valve, and a refrigerant circulating in the refrigeration cycle flows inside the heat transfer tubes and exchanges heat with air to be cooled and warmed.
  • a cross flow fan 7 sends air to a blowout opening 18 through an air flow path 16 from a suction opening 17.
  • a vertical airflow direction vane controls a flow direction of the air blown out from the blowout opening 18 in an up and down direction.
  • a filter 13 captures powder dust included in the air suctioned from the suction opening 17.
  • a filter cleaning mechanism 14 removes the powder dust which adheres to the filter 13.
  • a drain pan 15 includes a nozzle 20, which forms an upper wall of the air flow path adjacent to the blowout opening 18, to retrieve dew condensation created at the indoor heat exchanger 5 at a time of cooling or dehumidification operation.
  • the air flow path 16 leads from the suction opening 17 to the blowout opening 18.
  • a blowout opening 18 releases the air suctioned from the suction opening 17 by the cross flow fan 7 into a room through the air flow path 16.
  • a display unit 12 displays an operating status of the indoor unit.
  • a reception unit 19 receives a remote control signal for remote control.
  • installation interval (stage pitch) of centers of the heat transmission tubes, which constitute the indoor heat exchanger 5, in a vertical direction is 15 to 22 mm, and the indoor unit has a size of height H of 295 mm or less.
  • the front side heat exchanger 5a is formed in V-shape folded at an approximately center in a dual-partitioning or integral manner, and mountable quantities (the number of the stages) of the heat transfer tubes in the front side heat exchanger 5a in a vertical direction is around 12, while mountable quantities of the heat transfer tubes in a back side heat exchanger 5b in a vertical direction is around 6. That is, the indoor heat exchanger 5 has a capacity of not less than 16 stages as a whole.
  • auxiliary heat exchangers 5c each constituted of one row placed on an upstream side of airflow in the indoor heat exchanger 5.
  • the auxiliary heat exchangers 5c are provided on air upstream sides of each of lower sides of the back side heat exchanger 5b and the front side heat exchanger 5a.
  • a rotational center of the cross flow fan 7 is placed on a lower side with respect to a center of the height H of the indoor unit, but located above one third of the height H from the lower end, so that a space is provided on an upper side of the inside of the indoor unit, whereon the back side heat exchanger 5b can be mounted.
  • a diameter of the fan of the cross flow fan 6 can be equal to or more than 100 mm, which enables noise reduction and high efficiency.
  • the suction opening 17 of indoor air into the indoor unit is provided at an upper section of the indoor unit facing the upper side of the front side heat exchanger 5a and the back side heat exchanger 5b, and is covered by a grille 9 through which indoor air passes. Since the suction opening 17 is formed in a manner to occupy most of the upper section of the indoor unit, having sufficient suction area, a design surface on the front side of the indoor unit does not include a suction opening of indoor air.
  • the filter 13 is placed at an air flow path between the panel 9 whereto the suction opening 17 is provided and the indoor heat exchanger 5, having a function to capture powder dust flows in along with air from the suction opening 17 before the powder dust enters into the indoor heat exchanger 5.
  • the filter cleaning mechanism 14 is composed of a moving device to move the filter 13, a pressurizing unit 14c to press the filter 13 against a brush 14a, the brush 14a to collect powder dust which adheres to the filter 13, and a dust-collection box 14b to store the collected powder dust. Since the air conditioner periodically removes the powder dust adheres to the filter 13, it is possible to keep the indoor heat exchanger 5 or the cross flow fan 7, etc.
  • the filter cleaning mechanism 14 is located diagonally to the upper front of the front side heat exchanger 5a in V-shape with a prescribed interval, and a space is provided between the filter cleaning mechanism 14 and the front side heat exchanger 5a, air which passes through the filter 13 flows to a lower portion of the front side heat exchanger 5a without being obstructed by the filter cleaning mechanism 14.
  • heat exchange can be performed efficiently, and a high energy-saving performance can be obtained.
  • the filter cleaning mechanism 14 is not placed between an upper end of the front side heat exchanger 5a and an upper end of the back side heat exchanger 5b, and the suction opening 17, so that the filter cleaning mechanism 14 does not affect a size of the height H of the indoor unit. Further, the indoor heat exchanger 5 can be efficiently installed inside the indoor unit 1 with a restriction on the size of the height. Thus, a high energy-saving performance can be obtained.
  • the filter cleaning mechanism 14 is located ahead of the front side heat exchanger 5a, and a part or whole the filter cleaning mechanism 14 is not placed between an end of the indoor heat exchanger 5 in a horizontal direction and a side surface of the indoor unit, so that the filter cleaning mechanism 14 does not affect a size of the width L of the indoor unit to increase, or to be horizontally long. Further, the indoor heat exchanger 5 can be efficiently installed inside the indoor unit 1 with a restriction on the size of the width. Thus, a high energy-saving performance can be obtained.
  • the grille 10 which is provided at a position facing the front side heat exchanger 5a on a front side of the indoor unit in an openable and closable manner, or a detachable manner, does not include a suction opening on the front side thereof, as shown in Fig. 3 , so that it is possible to provide sophisticated interior. Since the suction opening 17 is concentrated in the upper portion of the indoor unit, it is possible to reduce the size of the filter 13, which allows for an inexpensive configuration. Further, since the height of the indoor unit is up to 295 mm in Fig. 2 , and the width of the indoor unit is up to 800 mm in Fig.
  • Fig. 4 is a graph showing a relation between the number of the stages in the indoor heat exchanger and the total of material usage of the indoor heat exchanger and the outdoor heat exchanger (sum of copper and aluminum) under a same achievement ratio of standard values according to Energy Conservation Law (Law concerning the Rational Use of Energy), wherein the vertical axis shows the material usage (unit: kg), and the horizontal axis shows the number of stages in the indoor heat exchanger. It is calculated as changes in heat exchange capacity according to changes in the number of the stages in the indoor heat exchanger when assuming a unit size (width) of the indoor unit is constant.
  • the material usage can be reduced more when increasing the size of the indoor unit rather than the outdoor unit. Further, the material usage can be reduced further by using alminun or alminun alloy for either one of or both of the fins and the heat transfer tubes in the heat exchanger.
  • Fig. 5 shows the diameter of the fan and air volume at a same noise level when the number of the stages in the indoor heat exchanger 5 is 16.
  • the vertical axis shows air volume (unit: m 3 /min) to be sent, and the horizontal axis shows a diameter (unit: mm) of a cross flow fan, with values shown in a solid line.
  • APF is improved as the fan diameter is increased.
  • the air volume to be sent can be increased, which results in improvement of APF.
  • the appropriate size of the fan diameter is 110 mm to 115 mm.
  • an air conditioner with an indoor unit larger in dimension than the above-mentioned indoor unit is applied similarity reduction to have an indoor unit with a cross-section shape of 800 mm or smaller in width and 295 mm or smaller in height, and is configured to include a cross flow fan with a diameter of 99 mm or smaller, and an indoor heat exchanger having the stages 15 or less in number so as to reduce the size of the indoor unit, and a deteriorated energy-saving performance (cooling/heating average COP standard) in the indoor unit is compensated in the outdoor unit side, so that the material usage is not increased.
  • Fig. 6 is a transverse sectional view of an indoor unit for another air conditioner according to the first embodiment of the present invention.
  • the indoor heat exchanger 5 is configured to be an integrated heat exchanger whereof a front surface on an air inflow side and a back surface on an air outflow side form a continuous surface from the upper end to the lower end, so that it is possible to freely set a shape of the indoor heat exchanger 5 in accordance with a shape of an indoor air flow path.
  • the heat exchanger can be packed in a more dense state, and downsized with high efficiency.
  • it is possible to further reduce the burden on the environment without the need of using extra materials for the indoor air flow path.
  • Fig. 7 is a right side view of the air conditioner according to the first embodiment of the present invention.
  • reprocessed plastic has been applied not only to a cross flow fan which users does not directly see, but also to design parts.
  • a main body 8 whereto the indoor heat exchanger 5 and a blower device, etc.
  • the panel 9 including a lateral face of an outer shell and a suction opening, the grille 10 as a design surface on the front side, which is provided in an openable and closable manner or a detachable manner, a design part forming an outer shell of the vertical airflow direction vane (not shown), and the cross flow fan.
  • the suction opening 17 is explained in a manner to be formed only at the upper surface of the indoor unit. However, it is not limited to this configuration, and the suction opening 17 can be formed only on the front side of the indoor unit. Meanwhile, in a configuration where the suction opening 17 is formed on both the upper surface and the front surface as well, the same effect can be obtained on transmitted from the server.
  • the air conditioner according to the present invention including the indoor unit of the wall-hung type, the air conditioner being formed by connecting the inverter-driven compressor whose rotation rate can be controlled, the four-way valve, the indoor heat exchanger, the decompression device, and the outdoor heat exchanger, and being capable of operating the cooling cycle and the heating cycle by the switching of the four-way valve, includes the indoor unit includes the case having the suction opening either at the upper surface or the front surface, or at the upper surface and the front surface, and the blowout opening at the lower surface, and the cross flow fan which sends the indoor air suctioned from the suction opening into the case to the blowout opening through the indoor heat exchanger, the indoor unit has the shape of which the size is up to 800 mm in width, and up to 295 mm in height, the diameter of the cross flow fan is not less than 100 mm but not more than 115 mm, and the number of the stage of the indoor heat exchanger is not less than 16.
  • the air conditioner has an effect to realize high energy-saving performance within a size range of the indoor unit in consideration of an installation space of the air conditioner, and to reduce the burden on the environment by reducing material usage.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
  • Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
EP07023472.9A 2006-12-08 2007-12-04 Air conditioner Active EP1930663B9 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006332084A JP4501930B2 (ja) 2006-12-08 2006-12-08 空気調和装置

Publications (4)

Publication Number Publication Date
EP1930663A2 EP1930663A2 (en) 2008-06-11
EP1930663A3 EP1930663A3 (en) 2013-03-13
EP1930663B1 EP1930663B1 (en) 2017-08-16
EP1930663B9 true EP1930663B9 (en) 2018-06-27

Family

ID=38974701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07023472.9A Active EP1930663B9 (en) 2006-12-08 2007-12-04 Air conditioner

Country Status (4)

Country Link
EP (1) EP1930663B9 (zh)
JP (1) JP4501930B2 (zh)
CN (1) CN101196317B (zh)
ES (1) ES2640473T3 (zh)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5316335B2 (ja) * 2008-10-09 2013-10-16 ダイキン工業株式会社 省エネ支援装置
JP2010216718A (ja) * 2009-03-17 2010-09-30 Panasonic Corp フィン付き熱交換器
JP5447566B2 (ja) * 2012-03-22 2014-03-19 ダイキン工業株式会社 空調室内機
JP2014119131A (ja) * 2012-12-13 2014-06-30 Mitsubishi Electric Corp 空気調和機の室内機
EP3412979B1 (en) * 2014-10-30 2023-09-20 Mitsubishi Electric Corporation Air-conditioning device
WO2017092140A1 (zh) * 2015-11-30 2017-06-08 美的集团武汉制冷设备有限公司 除尘模块、净化装置及挂壁式空调器
JP6787942B2 (ja) * 2018-03-30 2020-11-18 ダイキン工業株式会社 空気調和機の室内機
JP6926024B2 (ja) * 2018-03-30 2021-08-25 ダイキン工業株式会社 空気調和機の室内機
WO2020047928A1 (zh) * 2018-09-05 2020-03-12 广东美的制冷设备有限公司 壁挂式空调室内机及壁挂式空调器
WO2020047929A1 (zh) * 2018-09-05 2020-03-12 广东美的制冷设备有限公司 壁挂式空调室内机及壁挂式空调器

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3918207B2 (ja) * 1995-08-02 2007-05-23 株式会社日立製作所 空気調和機
US5987911A (en) * 1997-11-13 1999-11-23 Mitsubishi Denki Kabushiki Kaisha Air conditioner
JP3168266B1 (ja) * 1999-12-27 2001-05-21 株式会社日立製作所 空気調和機
ES2312458T3 (es) * 2000-09-29 2009-03-01 Mitsubishi Denki Kabushiki Kaisha Acondicionador de aire.
AU9417701A (en) * 2000-10-04 2002-04-15 Sharp Kk Air conditioner and temperature detector
JP3828377B2 (ja) * 2001-05-10 2006-10-04 株式会社日立製作所 空気調和機
JP2003232553A (ja) * 2002-02-07 2003-08-22 Daikin Ind Ltd 空気調和機
JP2005016830A (ja) 2003-06-26 2005-01-20 Sanyo Electric Co Ltd 空気調和機
JP3873945B2 (ja) * 2003-08-04 2007-01-31 三菱電機株式会社 空気調和装置
JP4178472B2 (ja) * 2004-03-18 2008-11-12 三菱電機株式会社 熱交換器及び空気調和機
JP4196346B2 (ja) * 2004-03-25 2008-12-17 三菱電機株式会社 空気調和機
JP2006162132A (ja) * 2004-12-06 2006-06-22 Daikin Ind Ltd 空気調和機の室内機

Also Published As

Publication number Publication date
JP4501930B2 (ja) 2010-07-14
ES2640473T3 (es) 2017-11-03
EP1930663A2 (en) 2008-06-11
CN101196317A (zh) 2008-06-11
ES2640473T9 (es) 2018-11-20
EP1930663B1 (en) 2017-08-16
CN101196317B (zh) 2011-02-16
EP1930663A3 (en) 2013-03-13
JP2008145040A (ja) 2008-06-26

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