EP1975527B1 - Appareil de circuit de réfrigération - Google Patents

Appareil de circuit de réfrigération Download PDF

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Publication number
EP1975527B1
EP1975527B1 EP08001834.4A EP08001834A EP1975527B1 EP 1975527 B1 EP1975527 B1 EP 1975527B1 EP 08001834 A EP08001834 A EP 08001834A EP 1975527 B1 EP1975527 B1 EP 1975527B1
Authority
EP
European Patent Office
Prior art keywords
filter
refrigeration cycle
refrigerant
foreign matters
cycle apparatus
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.)
Ceased
Application number
EP08001834.4A
Other languages
German (de)
English (en)
Other versions
EP1975527A3 (fr
EP1975527A2 (fr
Inventor
Hiroaki Tsuboe
Kenichi Nakamura
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.)
Hitachi Johnson Controls Air Conditioning Inc
Original Assignee
Hitachi Johnson Controls Air Conditioning Inc
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 Hitachi Johnson Controls Air Conditioning Inc filed Critical Hitachi Johnson Controls Air Conditioning Inc
Publication of EP1975527A2 publication Critical patent/EP1975527A2/fr
Publication of EP1975527A3 publication Critical patent/EP1975527A3/fr
Application granted granted Critical
Publication of EP1975527B1 publication Critical patent/EP1975527B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003—Filters
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/18—Refrigerant conversion
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size

Definitions

  • the present invention relates to a refrigeration cycle apparatus, and particularly to a refrigeration cycle apparatus suitable for reusing existing pipes in which solid foreign matters and liquid impurities remain.
  • a refrigeration cycle apparatus of the kind referred to in the preamble portion of patent claim 1 is known from JP 2005 315435 A .
  • an air conditioner As a refrigeration cycle apparatus forming a refrigeration cycle by connecting a compressor, a heat source unit side heat exchanger, an expansion device, and a using side heat exchanger by means of a liquid refrigerant pipe and a gas refrigerant pipe, there is known an air conditioner, for example.
  • the reused connection pipes may retain residual contaminants (liquid impurities) enclosed within the old machine such as a refrigerating machine oil (an mineral oil, alkylbenzene or the like), an oxidation degraded reactant of the refrigerating machine oil and a chlorine compound, which are insoluble or poor soluble components with respect to the HFC-based refrigerant used in the new machine.
  • a refrigerating machine oil an mineral oil, alkylbenzene or the like
  • an oxidation degraded reactant of the refrigerating machine oil and a chlorine compound
  • JP-2003-42603 A discloses a working method of setting the concentration of the impurities remaining in the connection pipes with respect to the refrigerating machine oil in the new machine to be equal to or smaller than an acceptable value by enclosing the same refrigerating machine oil as that in the new machine within the pipes at the time of vacuuming, for example.
  • JP-2000-9368 A discloses to perform cleaning operation of collecting the impurities remaining in the connection pipes when reusing the connection pipes, for example.
  • JP-2002-224513 A discloses one example of the strainer used herein, for example.
  • GB 2411712 A discloses a refrigeration cycle apparatus, forming a refrigeration cycle by connecting a compressor, a heat source unit side heat exchanger, an expansion device, and a using side heat exchanger by means of a liquid refrigerant pipe and a gas refrigerant pipe.
  • the period of renewal construction may become long due to addition of refrigerating machine oil enclosing work, cleaning operation work or the like for setting the concentration of impurities to be equal to or smaller than an acceptable value, for example.
  • a problem to be solved of the present invention is to provide a refrigeration cycle apparatus which can efficiently reuse existing pipes.
  • the liquid impurity such as mineral oil is almost insoluble with respect to the liquid refrigerant, it is separated from the liquid refrigerant, and since the liquid impurity has a lower specific gravity than the liquid refrigerant, it moves upwards. Accordingly, by providing a filter for capturing the liquid impurity at the upper stage side in the liquid refrigerant stored in the receiver, the liquid impurity can be effectively captured. Further, since the space of each of the openings of the refrigerant pipes is defined by the lower stage side filter, the solid foreign matter is captured by the filter soon after discharged from the refrigerant pipes.
  • Figs 1 to 5 an embodiment of the refrigeration cycle apparatus to which the present invention is applied will be described with reference to Figs 1 to 5 .
  • the present invention is not only limited to this but also applicable to a refrigeration cycle apparatus which forms a refrigeration cycle and reuses existing pipes.
  • a multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit is described as an example, the present invention is not limited to this but also applicable to an air conditioner with one to one connection.
  • the same functional parts are denoted by the same reference numerals to eliminate duplicated descriptions.
  • Fig. 1 is a view showing a cycle system diagram of the air conditioner of the present embodiment.
  • the air conditioner is composed by an outdoor unit 30, indoor units 40a and 40b, a liquid refrigerant pipe 7 and a gas refrigerant pipe 12 which connect these, and the like.
  • the outdoor unit 30 is provided with a compressor 1, a four-way valve 2, a heat source unit side heat exchanger 3, an outdoor expansion valve 4, a receiver 5, an accumulator 15 and the like, and constructed by connecting those with a refrigerant pipe.
  • a compressor 1 a four-way valve 2
  • a heat source unit side heat exchanger 3 an outdoor expansion valve 4
  • a receiver 5 an accumulator 15 and the like
  • a refrigerant pipe At connection ports to the liquid refrigerant pipe 7 and the gas refrigerant pipe 12, gate valves 6 and 13 are provided, and a solid matter capturing strainer 14a is provided in the refrigerant pipe on a suction side of the compressor 1.
  • the respective indoor units 40a and 40b are provided with indoor expansion valves 9a and 9b, using side heat exchangers 10a and 10b, and the like, and constructed by connecting those with the refrigerant pipes.
  • Fig. 2 is a view showing a modified embodiment of the air conditioner of the present embodiment.
  • the difference between Fig. 1 and Fig. 2 is only the position on which the strainer 14 is arranged.
  • the solid matter capturing strainer 14a is provided on the suction side of the compressor 1 in the outdoor unit 30 in Fig. 1 , however, alternatively, a solid matter capturing strainer 14b may be provided in the gas refrigerant pipe 12 as shown in Fig. 2 .
  • a high temperature and high pressure gas refrigerant compressed by the compressor 1 is discharged from the compressor 1, passes through the four-way valve 2, flows into the heat source unit side heat exchanger 3, and exchanges heat there to be condensed into liquid.
  • the condensed liquid refrigerant passes through the outdoor expansion valve 4, which is a first expansion device and fully opened, an excess refrigerant is accumulated in the receiver 5, and a remaining refrigerant passes through the gate valve 6 and is sent to the indoor units 40a and 40b.
  • the sent liquid refrigerant flows into the indoor expansion valves 9a and 9b, which are second expansion devices, is decompressed there to be at a low pressure so as to be in a low pressure two phase state, and exchanges heat with a using side medium, such as air, to be evaporated into gas in the using side heat exchangers 10a and 10b.
  • the gas refrigerant returns to the compressor 1 through the solid matter capturing strainer 14b, the gate valve 13 and the four-way valve 2 in the case of Fig. 2 , through the gate valve 13, the four-way valve 2, and through the solid matter capturing strainer 14a in the case of Fig. 1 .
  • the high temperature and high pressure gas refrigerant compressed by the compressor 1 is discharged from the compressor 1 together with the refrigerating machine oil for HFC, flows into the using side heat exchangers 10a and 10b through the four-way valve 2 and the gate valve 13 (and the solid matter capturing strainer 14b in the case of Fig. 2 ), exchanges heat there with the using side medium such as air and is condensed into liquid.
  • the condensed liquid refrigerant is flown into the gate valve 6 and the receiver 5, decompressed to be at a low pressure by the outdoor expansion valve 4, exchanges heat with a heat source unit side medium such as air and water in the heat source unit side heat exchanger 3, and is evaporated into gas.
  • the gas refrigerant returns to the compressor 1 through the four-way valve (and the solid matter capturing strainer 14a in the case of Fig. 1 ).
  • the horizontal axis indicates the solubility of refrigerant with respect to the refrigerating machine oil (refrigerating machine oil for HFC + mineral oil quantity), 0% indicates the case of consisting only of the refrigerating machine oil (refrigerating machine oil for HFC + mineral oil), and 100% indicated the case of consisting only of the refrigerant.
  • the vertical axis indicates temperature.
  • the mineral oil is hardly dissolved in the HFC-based refrigerant while it is dissolved in the refrigerating machine oil for HFC.
  • the mineral oil do not separate in the compressor in which a large quantity of refrigerating machine oil for HFC exists, but separates in the liquid connection pipe 7 and the receiver 5 in which a large quantity of liquid refrigerant exists.
  • the filter device which is a characteristic part of the present invention and installed in the receiver 5 will be described with reference to Fig. 4 .
  • the filter device is composed by different filters 53 and 54 and the like, which are configured in a two stage of upper and lower sides in the receiver 5.
  • the filter 53 is provided in the upper stage in the receiver 5 and made of a fibrous material with a relatively large mesh number, and the material of the fiber is composed of at least one of polyester and polypropylene.
  • the liquid refrigerant and the refrigerating machine oil for HFC dissolved in the liquid refrigerant are the liquid with remarkably low viscosity.
  • the mineral oil is the liquid with remarkably higher viscosity as compared to those of the liquid refrigerant and the refrigerating machine oil for HFC dissolved in the liquid refrigerant. Therefore, while the liquid refrigerant and the refrigerating machine oil for HFC dissolved in the liquid refrigerant pass through the filter 53, the mineral oil is trapped between the fibers of the filter 53 with the large mesh number, and after that, it is captured by a capillary phenomenon in the fibers.
  • the filter 53 in the receiver 5, the mineral oil discharged together with the refrigerating machine oil for HFC from the inside of the compressor 1 separates in the receiver 5, and it is possible to capture only the separated mineral oil by the filter 53.
  • the compressor 1 is of a high-pressure chamber type in which the pressure of the refrigerating machine oil accumulating part in the compressor 1 is high, or that an oil separator is arranged at the discharge part of the compressor 1, the temperature of the refrigerating machine oil accumulated in the compressor 1 and the oil separator becomes high.
  • the temperature of the receiver 5 becomes lower than that temperature.
  • the filter 53 in order to capture the mineral oil in the filter 53, it is necessary for the filter 53 to be brought into contact with the mineral oil. Therefore, when starting and stopping the compressor 1, the refrigerant is recovered in the receiver 5 by performing operation while setting the expansion device on the downstream side of the receiver 5 (which is the indoor expansion valves 9a and 9b in the case of cooling operation, or the outdoor expansion valve 4 in the case of heating operation) in a fully closed state or a slightly opened state close to the fully closed state.
  • the expansion device on the downstream side of the receiver 5 which is the indoor expansion valves 9a and 9b in the case of cooling operation, or the outdoor expansion valve 4 in the case of heating operation
  • the captured amount of the mineral oil by the filter 53 decreases as the flow rate with respect to the filter 53 becomes higher. This is because the mineral oil once captured by the filter 53 is extruded outside the filter 53 by fluid force of the refrigerant.
  • the flowing-in speed of the mixed liquid becomes higher as it is close to pipe tip end parts of refrigerant introducing and delivering pipes 51 and 52 for introducing the mixed liquid of the HFC-based refrigerant, the refrigerating machine oil for HFC and the mineral oil into the receiver 5, the mixed liquid of the HFC-based refrigerant, the refrigerating machine oil for HFC and the mineral oil introduced in the receiver 5 is delivered from the receiver 5 after passing through the filter 53 by directing the pipe tip end parts downwards. This enables the mineral oil introduced in the receiver 5 to be prevented from being delivered without passing through the filter 53.
  • connection pipes when reusing the connection pipes, it is unnecessary to perform cleaning operation for recovering the impurities remaining in the connection pipes, and thus the working time of the renewing construction work can be suppressed, resulting in effectively reusing of the existing pipes.
  • the filter 54 arranged in the lower stage than the filter 53 is provided near the pipe tip end parts of the refrigerant introducing and delivering pipes 51 and 52 in the receiver 5.
  • the spaces 62 at the tip end portions of the refrigerant introducing and delivering pipes 51 and 52 are defined by the filter 54.
  • the filter 54 is made of a fibrous material of which size is greater than that of the filter 53, and has a mesh number enabling solid matters of several ⁇ m to be removed. That is, the material is fibrous in which fibers are more densely superposed, gaps between fibers are smaller, and the density is larger than those of the filter 53, and is composed of at least one of polyester, polypropylene, and SUS, as a characteristic of the fiber.
  • the filter 53 for capturing the mineral oil it is desirable to set a different density from that of the filter 54 in order to make the gaps between the fibers of the filter 53 large possibly, and to set the amount of the mineral oil which can be captured to be large possibly, since the mineral oil is captured inside the fibers by means of the capillary phenomena.
  • the filter 54 is arranged to surround the vicinity of the pipe tip end parts of the refrigerant introducing and delivering pipes 51 and 52.
  • a strainer for capturing foreign matters or the prior art can capture solid foreign matters of which particle size is equal to or greater than 20 ⁇ m.
  • the number of the solid foreign matters having a particle diameter equal to or greater than 20 ⁇ m is half or more of the total number of the solid foreign matters, and thus in case of the strainer which can capture solid foreign matters of which particle diameter is equal to or greater than 20 ⁇ m, solid foreign matters of which particle diameter is equal to or smaller than 20 ⁇ m will flow into the refrigerant compressor.
  • the solid foreign matters discharged from the refrigerant introducing and delivering pipes 51 and 52 are attached on a surface of the filter 54 on a side of the refrigerant introducing and delivering pipes 51 and 52 by the above mentioned configuration.
  • caps 58 and 59 and a body 60 are welded together. At that time, the temperature of the inner wall surface of the body 60 exceeds the maximum operation temperature of the filters 53 and 54. Accordingly, if the filters 53 and 54 are constructed so as to be in contact with the inner wall surface of the body 60, the filters 53 and 54 will be melted by the heat, and will not be able to capture the refrigerant insoluble components.
  • this causes the passage of the liquid refrigerant introduced in the receiver 5 and the refrigerating machine oil for HFC dissolved in the liquid refrigerant to be blocked in the receiver 5, so that those can not be delivered from the inside of the receiver 5, and the equipment stops due to overshooting of the discharge temperature of the compressor 1, or the abrasion of the sliding part occurs due to lack of the refrigerating machine oil in the compressor 1.
  • a predetermined gap ⁇ d is provided between the body 60 and the filters 53 and 54 so that the temperatures of the filters 53 and 54 is equal to or smaller than the maximum operation temperature, to prevent the temperature of the inner wall surface of the body 60 from being transmitted to the filters.
  • the solid matter capturing strainers 14a and 14b have the structure in which an introducing cap 71 having an opening in its center is connected on one bottom side, and a cylindrical screen 70 having a screen arranged therein for capturing solid foreign matters is encapsulated in a pressure-resistant container 74 on the other bottom side.
  • the connection of the introducing cap 71 and the screen 70 prevents the solid foreign matters from flowing into and out from a connection part of the introducing cap 71 and the screen 70 by entire welding in the circumferential direction.
  • connection between the inner surface of the pressure-resistant container 74 and the introducing cap 71 also prevents the flowing-in and flowing-out of the solid foreign matters by entire caulking in the circumferential direction or by entire welding in the circumferential direction.
  • the flow of the refrigerant, the refrigerating machine oil and the solid foreign matters in the solid matter capturing strainer 14a and 14b flows as shown in the solid line arrows when the refrigerant, the refrigerating machine oil and the solid foreign matters firstly flow into the strainers from the side of the pipe 72.
  • the refrigerant and the refrigerating machine oil pass through the openings of the screen and flow out from the side of the pipe 73. Since the solid matters having a particle size equal to or greater than that of the openings of the screen 70 cannot pass through the screen 70, those are captured by the inner surface of the screen 70.
  • the material of the screen 70 used for the solid matter capturing strainer 14a and 14b is desirably made from SUS, which is a material which captures solid foreign matters having a particle size equal to or greater than several ⁇ m, does not degrades the refrigerant and the refrigerating machine oil to be used, as well as the screen 70 itself.
  • the acceptable value of the mixing amount of the solid foreign matters is set as a specification of the refrigerant compressor 1, and if the mixing amount of the solid foreign matters is equal to or smaller than the acceptable value, there is no problem even if a part of the solid foreign matters remaining in the liquid refrigerant pipe 7 and the gas refrigerant pipe 12, passes through the screen 70 and flows into the refrigerant compressor 1.
  • the screen 70 used for the solid matter capturing strainer 14a and 14b captures solid foreign matters having a particle size equal to or greater than several ⁇ m, there is no problem if the capturing rate is equal to or smaller than 100%.
  • the inner periphery and the outer periphery of the screen 70 may be reinforced by a high-strength member such as punching metal
  • the solid matter capturing strainer 14a is arranged on the suction side of the compressor 1 as illustrated in Fig. 1 , the solid foreign matters remaining in the liquid refrigerant pipe 7 and the gas refrigerant pipe 12, which are solid foreign matters in the refrigeration cycle, and abrasion powder generated due to the aging degradation of the compressor 1 are all gathered in the solid matter capturing strainer 14a. Therefore, it is important to ensure the area of the screen 70 of the solid matter capturing strainer 14a sufficiently, so as not to clog the solid matter capturing strainer 14a by the solid foreign matters.
  • the solid matter capturing strainer 14b is arranged between the gas connection pipe 12 and the gas gate valve 13
  • only the solid foreign matters remaining in the liquid refrigerant pipe 7 and the gas refrigerant pipe 12 flow into the solid matter capturing strainer 14b during the cooling operation.
  • only abrasion powder generated due to the aging degradation of the compressor 1 flows into the solid matter capturing strainer 14b.
  • the amount of the solid foreign matters flowing into the solid matter capturing strainer 14b is smaller than the solid matter capturing strainer 14a, and the area of the screen 70 of the solid matter capturing strainer 14b can be set smaller, which enables downsizing.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
  • Lubricants (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (7)

  1. Appareil à cycle de réfrigération, formant un cycle de réfrigération en connectant un compresseur (1), un échangeur de chaleur situé du côté de l'unité de source de chaleur (3), un dispositif d'expansion, et un échangeur de chaleur situé du côté utilisation au moyen d'un tuyau de réfrigérant liquide (7) et d'un tuyau de réfrigérant gazeux (12),
    le tuyau de réfrigérant liquide (7) étant pourvu d'un réservoir (5),
    sachant que, dans le réservoir (5), des ouvertures respectives (63,64) d'un tuyau situé côté amont (51) et d'un tuyau situé côté aval (52) de réfrigérant liquide sont prévues,
    caractérisé en ce que le tuyau de réfrigérant gazeux (12) est pourvu d'une passoire (14) et que, dans le réservoir du tuyau de réfrigérant liquide, il est prévu deux filtres (53,54) qui sont réalisés dans deux niveaux des côtés supérieur et inférieur du réservoir, le filtre (54) disposé dans le niveau inférieur définissant des espaces (62) aux ouvertures respectives (63,64) du tuyau situé du côté amont (51) et du tuyau situé côté aval (52) et capturant différents objets cibles déchargés respectivement par le tuyau de réfrigérant (7), et
    le filtre (53) prévu dans le niveau supérieur pour capturer de l'huile minérale est composé d'un matériau fibreux ayant un nombre de mailles permettant à de l'huile de machine réfrigérante HFC de traverser et à l'huile minérale d'être capturée, le filtre (54) prévu au niveau inférieur pour capturer des matières étrangères solides est composé d'un matériau fibreux ayant un nombre de mailles permettant à de l'huile de machine réfrigérante HFC de traverser et à des matières étrangères solides de plusieurs µm ou plus d'être capturées.
  2. Appareil à cycle de réfrigération selon la revendication 1, caractérisé en ce que le dispositif d'expansion comprend un premier dispositif d'expansion (4) et un second dispositif d'expansion (9a, 9b), et que le réservoir est un récepteur (5) prévu entre le premier dispositif d'expansion (4) et le second dispositif d'expansion (9a, 9b) pour stocker le réfrigérant liquide.
  3. Appareil à cycle de réfrigération selon la revendication 2, caractérisé en ce que les deux filtres (53,54) sont prévus dans le récepteur avec un intervalle prédéterminé par rapport à une surface de paroi interne du récepteur (5).
  4. Appareil à cycle de réfrigération selon la revendication 3, caractérisé en ce que le filtre (54) destiné à capturer les matières étrangères solides et le filtre (53) destiné à capturer l'huile minérale sont composés d'un matériau fibreux constitué de polyester, et que le filtre (54) destiné à capturer les matières étrangères solides est réalisé de manière à avoir une densité supérieure à celle du filtre (53) destiné à capturer l'huile minérale.
  5. Appareil à cycle de réfrigération selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la passoire (14) est prévue entre les échangeurs de chaleur situés du côté utilisation (10a, 10b) et le compresseur (1), et qu'un écran de la passoire (14) est composé de SUS permettant à des matières solides de plusieurs µm ou plus d'être capturées.
  6. Appareil à cycle de réfrigération selon la revendication 2, caractérisé en que l'un parmi le premier dispositif d'expansion (4) et le second dispositif d'expansion (9a,9b) situé du côté aval du récepteur (5) est entièrement fermé, décrit un angle légèrement ouvert lors d'au moins une opération de démarrage et d'arrêt du compresseur.
  7. Appareil à cycle de réfrigération selon la revendication 2, comprenant en outre une vanne à quatre distributions (2).
EP08001834.4A 2007-03-28 2008-01-31 Appareil de circuit de réfrigération Ceased EP1975527B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007084909A JP4370478B2 (ja) 2007-03-28 2007-03-28 冷凍サイクル装置

Publications (3)

Publication Number Publication Date
EP1975527A2 EP1975527A2 (fr) 2008-10-01
EP1975527A3 EP1975527A3 (fr) 2010-04-14
EP1975527B1 true EP1975527B1 (fr) 2019-01-16

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Application Number Title Priority Date Filing Date
EP08001834.4A Ceased EP1975527B1 (fr) 2007-03-28 2008-01-31 Appareil de circuit de réfrigération

Country Status (3)

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EP (1) EP1975527B1 (fr)
JP (1) JP4370478B2 (fr)
CN (1) CN101275786B (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011226729A (ja) * 2010-04-22 2011-11-10 Panasonic Corp 冷凍装置
JP5536817B2 (ja) * 2012-03-26 2014-07-02 日立アプライアンス株式会社 冷凍サイクル装置
JP5673645B2 (ja) * 2012-10-11 2015-02-18 ダイキン工業株式会社 室外機
FR3116598A1 (fr) * 2020-11-24 2022-05-27 Valeo Systemes Thermiques Circuit de fluide réfrigérant comprenant un filtre à particules

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0771842A (ja) * 1993-08-31 1995-03-17 Toshiba Corp 冷却装置
JP3361765B2 (ja) 1998-04-24 2003-01-07 三菱電機株式会社 冷凍サイクル装置及びその形成方法並びに冷凍サイクル装置の室外機
JP3546736B2 (ja) * 1999-01-21 2004-07-28 三菱電機株式会社 冷凍装置
JP2002224513A (ja) 2001-02-01 2002-08-13 Tokyo Gas Co Ltd フィルタ
JP2002355508A (ja) * 2001-05-31 2002-12-10 Fuji Koki Corp 流体用濾過装置
JP2003042603A (ja) 2001-08-02 2003-02-13 Mitsubishi Electric Corp 冷凍サイクル装置の製造方法、冷凍サイクル装置、及び冷凍サイクル装置の運転方法
WO2003064941A1 (fr) * 2002-01-25 2003-08-07 Sporlan Valve Company Deshydrateur a noyau agglomere
JP2005249336A (ja) * 2004-03-05 2005-09-15 Mitsubishi Electric Corp 空気調和機
JP4225239B2 (ja) * 2004-04-27 2009-02-18 日立アプライアンス株式会社 冷凍サイクル装置
KR100710352B1 (ko) * 2004-11-23 2007-04-23 엘지전자 주식회사 공기조화기의 냉매 바이패스 여과장치 및 그 제어방법

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* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
JP4370478B2 (ja) 2009-11-25
CN101275786B (zh) 2012-07-04
JP2008241196A (ja) 2008-10-09
EP1975527A3 (fr) 2010-04-14
CN101275786A (zh) 2008-10-01
EP1975527A2 (fr) 2008-10-01

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