WO2011111602A1 - Climatiseur - Google Patents

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Publication number
WO2011111602A1
WO2011111602A1 PCT/JP2011/054911 JP2011054911W WO2011111602A1 WO 2011111602 A1 WO2011111602 A1 WO 2011111602A1 JP 2011054911 W JP2011054911 W JP 2011054911W WO 2011111602 A1 WO2011111602 A1 WO 2011111602A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
refrigerant
air conditioner
section
air
Prior art date
Application number
PCT/JP2011/054911
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English (en)
Japanese (ja)
Inventor
竜児 北野
Original Assignee
東芝キヤリア株式会社
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 東芝キヤリア株式会社 filed Critical 東芝キヤリア株式会社
Priority to JP2012504421A priority Critical patent/JPWO2011111602A1/ja
Publication of WO2011111602A1 publication Critical patent/WO2011111602A1/fr

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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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/153—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature
    • 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
    • F24F13/30—Arrangement or mounting of heat-exchangers

Definitions

  • the present invention relates to an air conditioner, and more particularly to an air conditioner using a non-azeotropic refrigerant mixture as a refrigerant.
  • a refrigerant flow path is formed in a plurality of plate-like fins arranged side by side with a predetermined fin pitch as an indoor and outdoor heat exchanger of a heat pump type air conditioner using a non-azeotropic refrigerant mixture
  • a finned tube heat exchanger that penetrates the heat transfer tubes
  • the refrigerant outlet portion of the heat transfer tube is positioned on the windward side, and the temperature difference between the refrigerant temperature and the air temperature on the outlet side is increased in both the cooling operation and the heating operation.
  • An air conditioner has been proposed (see, for example, Patent Document 1).
  • the connecting pipe between the first heat exchanger and the second heat exchanger is provided with a throttle means used as a throttle during the dehumidification operation, so that the cooling operation and the dehumidification operation are performed.
  • a throttle means used as a throttle during the dehumidification operation, so that the cooling operation and the dehumidification operation are performed.
  • Patent Document 1 the air conditioner described in Patent Document 1 is intended to improve performance during normal cooling operation and heating operation, and there is a problem that performance improvement during dehumidification cannot be achieved.
  • the air conditioner described in Patent Document 2 is a suitable arrangement when an azeotropic refrigerant is used, and a temperature gradient occurs in a non-azeotropic refrigerant mixture so that the refrigerant flows from the windward side to the leeward side.
  • a temperature gradient occurs in a non-azeotropic refrigerant mixture so that the refrigerant flows from the windward side to the leeward side.
  • the present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide an air conditioner that can improve the dehumidifying performance even when a non-azeotropic refrigerant mixture is used as the refrigerant.
  • an air conditioner includes a hermetic compressor, a four-way valve, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger.
  • the first heat exchanger unit that is communicated by a refrigerant pipe and the indoor heat exchanger serves as a condensing unit during dehumidifying operation
  • the second heat exchanger unit that serves as an evaporating unit during dehumidifying operation
  • the first An air conditioner having a throttle means that is provided between the heat exchanger section and the second heat exchanger section and performs a throttling action during a dehumidifying operation, and uses a non-azeotropic refrigerant mixture as a refrigerant.
  • the exchanger has a plurality of fins arranged side by side at a predetermined interval, and heat transfer tubes provided in a plurality of rows along the circulation direction of the heat exchange air, penetrating through the fins, and in the reheat dehumidification operation
  • the refrigerant inlet portion of the second heat exchanger section is provided in the leeward row, and the refrigerant outlet portion is provided in the leeward row. And wherein the door.
  • the air conditioner according to a preferred embodiment of the present invention can improve the dehumidifying performance even when a non-azeotropic refrigerant mixture is used as the refrigerant.
  • the conceptual diagram of the refrigerating cycle used for 1st Embodiment of the air conditioner which concerns on this invention The conceptual diagram which shows the side surface of the indoor side heat exchanger used for 1st Embodiment of the air conditioner which concerns on this invention.
  • coolant temperature in the evaporation part of the indoor side heat exchanger used for 1st Embodiment of the air conditioner which concerns on this invention Explanatory drawing of the air temperature and refrigerant
  • the conceptual diagram which shows the side surface of the indoor side heat exchanger used for 2nd Embodiment of the air conditioner which concerns on this invention The conceptual diagram which shows the side surface of the indoor side heat exchanger used for 3rd Embodiment of the air conditioner which concerns on this invention.
  • the air conditioner according to the first embodiment includes a refrigeration cycle 1, which includes a hermetic compressor 2, a four-way valve 3, an outdoor heat exchanger 4, The expansion device 5 and the indoor heat exchanger 6 are communicated with each other through a refrigerant pipe P.
  • the indoor heat exchanger 6 includes a first heat exchanger unit 61 that becomes a condensing unit during reheat dehumidification (hereinafter simply referred to as dehumidification) operation, and a second heat exchanger that becomes an evaporation unit during dehumidification operation. Further, a dehumidifying throttling means 7 is provided between the first heat exchanger section 61 and the second heat exchanger section 62, and performs a throttling action during the dehumidifying operation.
  • the refrigeration cycle 1 having such a configuration, as indicated by a broken line arrow, is a hermetic compressor 2 ⁇ a four-way valve 3 ⁇ a second heat exchanger 62 of the indoor heat exchanger 6 ⁇
  • the refrigerant is circulated through the path of the dehumidifying throttling means 7 ⁇ the first heat exchanger portion 61 of the indoor heat exchanger 6 ⁇ the expansion device 5 ⁇ the outdoor heat exchanger 4 ⁇ the four-way valve 3 ⁇ the hermetic compressor 2.
  • the hermetic compressor 2 ⁇ the four-way valve 3 ⁇ the outdoor heat exchanger 4 ⁇ the expansion device 5 ⁇ the first of the indoor heat exchanger 6
  • the refrigerant is circulated through the path of the heat exchanger section 61 ⁇ the dehumidifying throttling means 7 ⁇ the second heat exchanger section 62 of the indoor heat exchanger 6 ⁇ the four-way valve 3 ⁇ the hermetic compressor 2.
  • the dehumidifying throttling means 7 is fully opened to adjust the opening degree of the expansion device 5, and during the dehumidifying operation, the expansion device 5 is fully opened to open the dehumidifying throttling means 7 opening degree. Adjust.
  • the refrigeration cycle 1 enabling the dehumidifying operation is called a reheat dehumidifying circuit.
  • reheat dehumidification is to separate the indoor heat exchanger into a part having a lower temperature than room air, that is, an evaporation part, and a part having a higher temperature than room air, that is, a condensing part.
  • the first heat exchanger part 61 of the indoor heat exchanger 6 forms a condensing part and the second heat exchanger part 62 forms an evaporating part with the dehumidifying throttling means 7 as a boundary.
  • it is a system which dehumidifies, suppressing the change of room temperature by cooling the air in an evaporation part, dewing the water vapor
  • the indoor air cooled and dehumidified by the second heat exchanger section 62 is heated by the first heat exchanger section 61, or the indoor air cooled and dehumidified by the second heat exchanger section 62 and
  • the room air heated by the first heat exchanger unit 61 is mixed and blown out, and dehumidification is performed without lowering the room temperature.
  • the indoor heat exchanger 6 includes a plurality of fins f and heat transfer tubes that are provided in a plurality of rows (two rows in FIG. 2) through the fins f along the flow direction of the heat exchange air.
  • a fin-tube heat exchanger composed of p 1 to p 4 , a vertical portion 6a, a front inclined portion 6b that is connected to the vertical portion 6a and inclined forward and downward, and a front inclined portion 6b that is connected to the front inclined portion 6b at the top and rear downward
  • the rear inclined portion 6c is inclined to form a substantially reverse fishing hook shape (reverse V-shaped) when viewed from the side.
  • the vertical portion 6a and the front inclined portion 6b have a left side and a left side as shown by a thick arrow in FIG. Air flows from the upper side, and air flows from the upper side to the rear inclined portion 6c.
  • the outer surface side of the vertical portion 6a, the front inclined portion 6b, and the rear inclined portion 6c is the windward (air suction) side
  • the inner surface side is the leeward (air blowing) side.
  • the first heat exchanger unit 61 is made heat transfer tube p 2 provided on the leeward side of the heat transfer tube p 1 and the front inclined portion 6b provided on the rear inclined portion 6c, the heat transfer tube p 1 is continuous to the outside of the refrigerant piping P outside upper p 1a windward column, continuous to the inner upper p 2a of the heat transfer tube p 2 at the inner upper p 1b, the heat transfer tubes p 2 are diaphragm dehumidification at the inner lower end p 2b It continues to the means 7.
  • the second heat exchanger unit 62 is made of the heat transfer tubes p 4 provided on the upwind side of the heat transfer tube p 3 and the front inclined portion 6b provided on the vertical portion 6a, the heat transfer tubes p 3 is the leeward column upper end continuous with throttle means 7 for dehumidification at p 3a, the heat transfer tubes p 4 is connected to an external refrigerant piping P at the upper p 4a.
  • the refrigerant inlet portion p 3a of the second heat exchanger section (evaporation section) 62 at the time of dehumidifying operation is provided in the column of the leeward side
  • the refrigerant outlet portion p 4a is provided in the column of the windward side.
  • the refrigerant outlet (inner lower end p 2b ) of the first heat exchanger section (condensing section) 61 during the dehumidifying operation is disposed leeward of the second heat exchanger section (evaporating section) 62.
  • the cooling mode operation will be described first.
  • the refrigerant is compressed by the compressor 2, and the high-temperature and high-pressure refrigerant is sent to the outdoor heat exchanger 4 as a condenser through the four-way valve 3, where the outside air
  • the liquid is condensed and liquefied by heat exchange with a high-temperature and high-pressure liquid refrigerant.
  • This high-temperature and high-pressure liquid refrigerant is squeezed by the expansion device 5 which is the main squeezing mechanism, becomes a low-temperature and low-pressure liquid refrigerant, and is sent to the first heat exchanger section 61. To the second heat exchanger section 62.
  • the low-temperature and low-pressure liquid refrigerant sent to the two first heat exchanger sections 61 and the second heat exchanger section 62 functioning as evaporators is heated with indoor air and heat in both the heat exchanger sections 61 and 62. It exchanges and vaporizes, and becomes a low-temperature and low-pressure gaseous refrigerant.
  • the room air is deprived of heat by heat exchange with the evaporative refrigerant at this time, and the room temperature is lowered.
  • the gaseous refrigerant from the second heat exchanger section 62 is sent again to the suction side of the compressor 2 through the four-way valve 3, and is compressed by the compressor 2, and the same process as described above is repeated.
  • the expansion device 5 is opened, the dehumidifying throttling means 7 is throttled, the first heat exchanger section 61 functions as a condenser, and the second heat exchanger section 62 functions as an evaporator.
  • the indoor air cooled and dehumidified by the second heat exchanger section 62 is heated by the first heat exchanger section 61, or the indoor air cooled and dehumidified by the second heat exchanger section 62 and the first
  • the indoor air heated by the heat exchanger unit 61 is mixed and blown out, and the indoor temperature is gradually increased.
  • the temperature of the azeotropic refrigerant is substantially constant in the evaporation section (indicated by a thin solid line in the figure), but the temperature of the non-azeotropic refrigerant mixture used in the present invention is evaporated. In the section, the temperature rises from the inlet to the outlet of the refrigerant (indicated by a thick solid line in the figure).
  • the air temperature is relatively high before the air passes through the evaporation section (windward), and is relatively low during the passage through the evaporation section (downwind after passing through the heat transfer tubes in the windward row). ((Indicated by broken lines in the figure).
  • the refrigerant inlet portion (p 3a ) of the second heat exchanger portion (evaporating portion) 62 is provided in the leeward row.
  • the refrigerant outlet portion (p 4a ) is provided in the windward row so that the air passing through each of the refrigerant inlet portion (p 3a ) and the refrigerant outlet portion (p 4a ) of the second heat exchanger portion 62 is provided.
  • the large temperature differences ⁇ t 1 and ⁇ t 2 are secured, and water vapor in the windward air is removed.
  • the refrigerant outlet part (inner lower end p 2b ) of the first heat exchanger part (condensing part) 61 at the time of the dehumidifying operation is arranged leeward of the second heat exchanger part (evaporating part) 62. As shown in FIG.
  • the temperature of the azeotropic refrigerant is substantially constant in the condensing part (indicated by a thin solid line in the figure), but the temperature of the non-azeotropic refrigerant used in the present invention is the first.
  • the temperature decreases from the inlet to the outlet of the refrigerant (shown by a thick solid line in the figure).
  • the outlet portion having the lowest temperature of the first heat exchanger section (condensing section) 61 is disposed leeward of the dehumidifying section (windward side of the front inclined section 6b), Temperature drop can be suppressed.
  • an air conditioner that can improve the dehumidifying performance even when a non-azeotropic refrigerant mixture is used as the refrigerant is realized.
  • the heat transfer tubes of the first heat exchanger section and the heat transfer tubes of the second heat exchanger section are adjacent to each other in the air flow direction. Cut portions or cuts are provided at the fin portions located between the rows.
  • the heat transfer pipe p 2 of the first heat exchanger section 61 and the heat transfer pipe p of the second heat exchanger section 62 of the indoor heat exchanger 6 used in the second embodiment A cutting portion 11 or a cut-up is provided at a portion of the fin f positioned between adjacent rows 4 .
  • a third embodiment of the present invention will be described.
  • the heat transfer tube of the first heat exchanger section of the indoor heat exchanger used in the first embodiment and the heat transfer pipe of the second heat exchanger section are adjacent to each other in the air flow direction.
  • the fins of the second heat exchanger section are made independent.
  • the fin portions 62 ⁇ / b> A of the second heat exchanger section 62 adjacent to the first heat exchanger section 61 are made independent.
  • the fourth embodiment in the indoor heat exchanger used in the second embodiment, the first heat exchanger section before and after the throttling means and the heat transfer tubes of the second heat exchanger section are arranged in the vicinity.
  • a cutting part or a cut-and-raised part is provided in a part of the fin.
  • the heat transfer tubes p 2 of the first heat exchanger section 61 and the second heat exchanger section 62 before and after the expansion means 7 are used.
  • P 4 is provided in the part of the fin f in the vicinity where the p 4 is disposed.
  • the fifth embodiment uses the number of refrigerant channels of the second heat exchanger section (evaporating section) 62 as the first heat exchanger section (evaporating section). More than 61 refrigerant flow paths.
  • the outer bottom p 1c of the heat transfer tube p 1 is connected to the refrigerant pipe P, heat extending in first flow passage to the outer upper end p 1a of the heat pipe p 1, at the outer upper p 1a, the heat transfer tube p 11 provided on the rear inclined portion 6c, branched into the heat exchanger tubes p 2 provided on the front inclined portion 6b
  • the two flow paths are joined by the dehumidifying throttling means 7.
  • Refrigerant inlet portion (heating operation the outlet) p 1c of the rear inclined portion 6c is positioned upwind.
  • the heat transfer tubes from the dehumidifying throttling means 7 are the heat transfer tubes p 3 and p 31 provided in the vertical portion 6a and the heat transfer tubes p 4 provided in the front inclined portion 6b in the second heat exchanger 62. Are branched into three flow paths so as to be connected to each other by a refrigerant pipe P.
  • the pressure loss of the evaporation unit is high, but the number of passes of the evaporation unit is larger than the number of passes of the condensing unit, and the circulation amount of the refrigerant can be increased to improve the dehumidification performance.
  • the condenser inlet (exit of the indoor heat exchanger 6 during heating operation) p1c during the dehumidifying operation is disposed on the windward side, and the windward (outside side) of the rear inclined portion 6c is disposed. 9)
  • the number of refrigerant flow paths to one flow path as shown in FIG. 9, it is possible to ensure overcooling and improve performance by air on the windward side having a relatively low temperature during heating operation. Can do.
  • an air conditioner that can improve the dehumidifying performance even when a non-azeotropic refrigerant mixture is used as the refrigerant is realized.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Central Air Conditioning (AREA)

Abstract

L'invention porte sur un climatiseur comportant une première section échangeur de chaleur dans laquelle un échangeur de chaleur interne sert de section de condensation dans une opération de déshumidification, une seconde section échangeur de chaleur servant de section d'évaporation dans l'opération de déshumidification, et un moyen de limitation d'écoulement placé entre la première section échangeur de chaleur et la seconde section échangeur de chaleur et fournissant un effet de limitation d'écoulement durant l'opération de déshumidification. L'échangeur de chaleur interne comporte des ailettes disposées les unes à côté des autres avec des espaces prédéterminés entre celles-ci, et également des rangées de tubes de transfert de chaleur pénétrant les ailettes et étant disposées dans la direction de l'écoulement d'air pour l'échange de chaleur. Durant l'opération de déshumidification, l'entrée de frigorigène de la seconde section échangeur de chaleur est localisée au niveau d'une rangée latérale aval et la sortie de frigorigène est localisée au niveau d'une rangée latérale amont.
PCT/JP2011/054911 2010-03-09 2011-03-03 Climatiseur WO2011111602A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012504421A JPWO2011111602A1 (ja) 2010-03-09 2011-03-03 空気調和機

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010051691 2010-03-09
JP2010-051691 2010-03-09

Publications (1)

Publication Number Publication Date
WO2011111602A1 true WO2011111602A1 (fr) 2011-09-15

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PCT/JP2011/054911 WO2011111602A1 (fr) 2010-03-09 2011-03-03 Climatiseur

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JP (1) JPWO2011111602A1 (fr)
WO (1) WO2011111602A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017103987A1 (fr) * 2015-12-15 2017-06-22 三菱電機株式会社 Déshumidificateur
EP3633273A4 (fr) * 2017-05-26 2021-03-03 Hitachi-Johnson Controls Air Conditioning, Inc. Climatiseur

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0622826U (ja) * 1992-08-31 1994-03-25 株式会社東芝 空気調和機の室内ユニット
JPH11264629A (ja) * 1998-03-19 1999-09-28 Daikin Ind Ltd クロスフィンコイル型熱交換器
JP2001317831A (ja) * 2000-05-08 2001-11-16 Matsushita Electric Ind Co Ltd 空気調和機
JP2003090650A (ja) * 2001-09-18 2003-03-28 Mitsubishi Electric Corp 流量制御装置、冷凍サイクル装置および空気調和装置
JP2004239606A (ja) * 2004-04-05 2004-08-26 Hitachi Ltd 空気調和機
JP2005083606A (ja) * 2003-09-05 2005-03-31 Matsushita Electric Ind Co Ltd フィン付き熱交換器およびその製造方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3397413B2 (ja) * 1993-06-01 2003-04-14 株式会社日立製作所 空気調和機
JP2010014288A (ja) * 2008-07-01 2010-01-21 Toshiba Carrier Corp 空気調和機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0622826U (ja) * 1992-08-31 1994-03-25 株式会社東芝 空気調和機の室内ユニット
JPH11264629A (ja) * 1998-03-19 1999-09-28 Daikin Ind Ltd クロスフィンコイル型熱交換器
JP2001317831A (ja) * 2000-05-08 2001-11-16 Matsushita Electric Ind Co Ltd 空気調和機
JP2003090650A (ja) * 2001-09-18 2003-03-28 Mitsubishi Electric Corp 流量制御装置、冷凍サイクル装置および空気調和装置
JP2005083606A (ja) * 2003-09-05 2005-03-31 Matsushita Electric Ind Co Ltd フィン付き熱交換器およびその製造方法
JP2004239606A (ja) * 2004-04-05 2004-08-26 Hitachi Ltd 空気調和機

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017103987A1 (fr) * 2015-12-15 2017-06-22 三菱電機株式会社 Déshumidificateur
JPWO2017103987A1 (ja) * 2015-12-15 2018-09-20 三菱電機株式会社 除湿機
US10737216B2 (en) 2015-12-15 2020-08-11 Mitsubishi Electric Corporation Dehumidifier
EP3633273A4 (fr) * 2017-05-26 2021-03-03 Hitachi-Johnson Controls Air Conditioning, Inc. Climatiseur

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