WO1996012921A1 - Appareil de conditionnement de l'air et procede pour controler l'operation de lavage de celui-ci - Google Patents
Appareil de conditionnement de l'air et procede pour controler l'operation de lavage de celui-ci Download PDFInfo
- Publication number
- WO1996012921A1 WO1996012921A1 PCT/JP1995/002181 JP9502181W WO9612921A1 WO 1996012921 A1 WO1996012921 A1 WO 1996012921A1 JP 9502181 W JP9502181 W JP 9502181W WO 9612921 A1 WO9612921 A1 WO 9612921A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compressor
- pressure
- temperature
- air conditioner
- sensor
- Prior art date
Links
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
- F25B45/00—Arrangements for charging or discharging refrigerant
-
- 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
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/001—Charging refrigerant to a cycle
-
- 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/002—Collecting refrigerant from a cycle
-
- 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
Definitions
- the present invention relates to an air conditioner capable of performing a cleaning operation for removing impurities in a refrigerant circuit and a cleaning operation control method thereof.
- the refrigerating machine oil for the HFC-based refrigerant examples include synthetic oils (eg, ester, ether, alkylbenzene oil, etc.).
- the conventional cleaning of the refrigerant circuit is performed on the ffi cloud, the cleaning operation is often performed for a long time, and there is a problem that much time is required for cleaning.
- each time exhausting residual impurities, in other words, changing oil it was necessary to remove and reinstall the troublesome parts. As a result, much time was required to remove the residual impurities.
- the conventional method has a problem in that the oil is changed each time the washing operation is performed once, and the operation of removing the residual impurities includes many steps as described above, so that the cost is high.
- the conventional method also had the problem that the number of steps required for development tests, such as reliability and evaluation tests, increased.
- the present invention has been made in view of such a point, and an object of the present invention is to perform a cleaning operation efficiently and in a short time, to perform an impurity removing operation easily, and to enhance a cleaning effect to improve reliability.
- Air conditioner that can improve
- An object of the present invention is to provide a cleaning operation control method for that purpose.
- the present invention relates to a compressor, a condenser, an expansion mechanism, and an evaporator, which are sequentially connected to form a closed circuit refrigerant circuit, and circulates the refrigerant through the refrigerant circuit.
- an air conditioner characterized in that a boat for extracting and filling oil is provided in a portion of the refrigerant circuit of the air us-wasted machine where the oil S in the refrigerant circuit is exposed.
- a dedicated port for extracting and filling oil is provided in a portion where oil accumulation is likely to occur, so that the oil exchange operation performed in connection with the removal of impurities is easier than in the past. And work time is reduced.
- Typical examples of the portion where the oil pool is likely to be generated include a bottom portion of a compressor, an accumulator, a receiver, and the like.
- the present invention provides an air net filter that connects a compressor, a condenser, an expansion mechanism, and an evaporator in order to form a closed circuit refrigerant circuit, and circulates refrigerant through the refrigerant circuit.
- a cleaning operation control method characterized in that during the cleaning operation, the start and stop of the operation of the compressor are repeated a predetermined number of times within a predetermined time.
- the air conditioner that executes the rotation control method includes a control unit that controls the compressor so that start and stop of the operation are repeated a predetermined number of times within a predetermined time.
- the present inventors investigated the product cleaning effect in the refrigerant circuit using the operating time, the number of start / stop times, and the discharge temperature as parameters. As a result, they found that increasing the number of times of starting and stopping had a greater cleaning effect than increasing the operating time.
- the present invention has been made based on these results. Therefore, according to the present invention, it is possible to remove the residual impurities in the refrigerant circuit in a shorter time than before, and to perform the washing. The effect can be enhanced. Since the cleaning time can be shortened, the cost can be reduced. In addition, by improving the cleaning effect, it is possible to improve the reliability of the pressure reducer such as the capillary tube and the electric expansion valve and to protect the compressor.
- the cleaning operation control method detects a pressure or temperature at a predetermined position in the refrigerant circuit, and the pressure or temperature is larger than a predetermined value in one operation.
- the compressor is operated for a predetermined time while controlling the operating frequency of the compressor, and then stopped for a predetermined time.
- a pressure or temperature in a discharge pipe connected to the compressor or a pressure or temperature in the condenser can be used as the pressure or temperature at the predetermined position.
- the pressure or temperature in the discharge pipe connected to the compressor and the pressure or temperature in the condenser are detected, and the pressure or temperature of either the discharge pipe or the condenser is detected.
- the frequency of the compressor is controlled so as to be larger than the predetermined value.
- the air conditioner of one embodiment is provided with a sensor for detecting the temperature or pressure of the discharge pipe or / and the condenser. Since temperature and pressure can be converted into each other, the sensor used is a temperature sensor or a pressure sensor.
- the control unit includes: a first determination unit that determines whether an output from the sensor is greater than the predetermined value; and a first determination unit that determines whether an output from the sensor is greater than the predetermined value. When it is determined that the output is equal to or less than the predetermined value, the operation frequency control device is controlled. Operating frequency control means for increasing the operating frequency of the compression contact.
- control unit has a start / stop control unit that starts the operation of the compressor until a predetermined time elapses from the start of the operation, and then stops the operation for a predetermined time.
- control unit of the air conditioner uses the first determination means, the operation frequency control means, and the start / stop control means to control the pressure or temperature at a predetermined location of the refrigerant circuit to be greater than a predetermined value for one operation.
- the operation of the compressor is continued for a predetermined time while controlling the frequency of the compressor so that the operation is stopped for a certain time.
- the start / stop of the operation of the compressor by the start / stop control means is repeated a predetermined number of times.
- the differential pressure between the high pressure side pressure and the low pressure side pressure of the compressor (2) is obtained, and the frequency of the compressor is set so that the differential pressure becomes larger than a predetermined value in one operation. After the compressor is operated for a predetermined time while controlling the pressure, the compressor is stopped for a predetermined time.
- the air conditioner that implements this method includes a sensor that detects the high-pressure side and the low-pressure side pressure of the compressor. Also, the control unit of the air conditioner receives the output from the sensor and determines whether or not the differential pressure between the high pressure side pressure and the low pressure side pressure is greater than a predetermined value; Operating frequency control means for controlling the operating frequency control device to increase the operating frequency of the compressor when the determining means determines that the differential pressure is equal to or less than the predetermined value. Further, the control unit has a start / stop control unit for continuing the operation of the compressor until a predetermined time has elapsed from the start of the operation, and then stopping the operation for a certain time.
- the control unit of the air conditioner uses the second determination means, the operation frequency control means, and the start / stop control means to determine the differential pressure between the high pressure side pressure and the low pressure side pressure of the compressor for one operation.
- the compressor operation is continued for a predetermined time while controlling the frequency of the compressor so that it becomes larger than a predetermined value, and then the operation is stopped for a predetermined time.
- the start / stop of the operation of the compressor by the start / stop control means is repeated a predetermined number of times.
- the air conditioner of one embodiment further includes a four-way switching valve provided in the refrigerant circuit for switching between a cooling operation and a heating operation, and an outside air temperature sensor for detecting an outside air temperature.
- the control unit includes a third determination unit that determines whether an output from the temperature sensor is equal to or higher than a predetermined temperature, and an operation mode control unit that controls the four-way switching valve according to a result of the determination.
- the operation mode control means determines that the outside air temperature is lower than the predetermined value so that the cleaning operation is performed in the cooling mode. In such a case, the four-way switching valve is controlled so that the washing operation is performed in the heating mode.
- FIG. 1 is a refrigerant circuit diagram of an air filter according to an embodiment of the present invention.
- FIG. 2 is an explanatory view showing a connection mode between the compressor and accumulator and the extraction / filling boat in the embodiment of the present invention.
- FIG. 3 is an explanatory diagram showing a connection mode between the receiver and the extraction / filling port in the embodiment of the present invention.
- FIG. 4 is a graph showing the results of an investigation of the product cleaning effect in the refrigerant circuit of FIG. 1 using the operating time and the number of starts and stops as parameters.
- FIG. 5 is a flowchart of the cleaning operation control in the embodiment of the present invention.
- FIGS. 5A and 5B are modifications of step S5 in FIG.
- FIG. 6 shows a printed wiring board of an outdoor unit according to an embodiment of the present invention.
- Figure 7 shows the printed circuit board of the current outdoor unit.
- FIG. 1 shows a refrigerant circuit diagram in this embodiment.
- A indicates an outdoor unit
- B indicates an indoor unit.
- the outdoor unit A is provided with a compressor 1, and the compressor 1 is connected to an inverter 52.
- the inverter 52 controls the operating frequency of the compressor 1 under the control of the control unit 50.
- the c suction pipe 3 connected to the four-way switching valve 4 and the discharge pipe 2 and suction pipe 3 of the compressor 1 accumulator 5 is interposed.
- the four-way switching valve 4 is connected to a first gas pipe 6 and a second gas pipe 7, respectively.
- An outdoor heat exchanger 9 is connected to the second gas pipe 7, and a propeller fan 10 is attached to the outdoor heat exchanger 9.
- the first liquid pipe 11, the receiver 12, and the second liquid pipe 13 are sequentially connected to the outdoor heat exchanger 9, and the first liquid pipe 11 is provided with an electric expansion valve 14. Have been.
- a liquid shutoff valve 15 and a first local pipe 16 are connected to the second liquid pipe 13 in this order.
- a gas shut-off valve 8 and a second local pipe 17 are connected to the first gas pipe 6 sequentially.
- An indoor heat exchanger 18 is connected between the first local pipe 16 and the second local pipe 17, and a cross flow fan 19 is attached to the indoor heat exchanger 18.
- the second liquid pipe 13 and the first liquid pipe 11 are connected by a defrost bypass pipe 20, and an electromagnetic valve 21 is interposed in the defrost bypass pipe 20.
- reference numeral 25 denotes a check valve
- reference numeral 26 denotes a capillary tube
- reference numerals 27 and 28 denote mufflers
- reference numerals 29 and 30 denote single union fittings
- reference numeral 33 denotes a filter
- reference character M denotes a motor.
- P1 to P9 are pressure sensors
- Te is a temperature sensor for measuring the outside air temperature
- C1 and TC2 are temperature sensors attached to the outdoor heat exchanger 9 and the indoor heat exchanger 18, respectively.
- outputs from the pressure sensors P1 to P9 those used for the cleaning operation control in this embodiment are, as described later, output from the pressure sensor P1 provided in the discharge pipe 2. is there.
- Outputs from other pressure sensors are used for control during operations other than cleaning operation. Used for
- the four-way switching valve 4 is switched, and the refrigerant discharged from the compressor 1 is transferred from the outdoor heat exchanger 9 as a condenser to the indoor heat as an evaporator, as indicated by a dashed arrow in the figure. Cooling operation is performed by circulating to exchanger 18. On the other hand, as indicated by the solid arrows in the figure, heating operation is performed by circulating the discharged refrigerant from the indoor heat exchanger 18 serving as a condenser to the outdoor heat exchanger 9 serving as an evaporator, in the reverse of the above. I do.
- the compressor 1, the accumulator 5, and the receiver 12 are connected to extraction / charging ports 22, 23, and 24, respectively.
- the connection mode between the pressure box machine 1 and the accumulator 5 and the extraction ports 22 and 23 is shown in FIG. 2, and the connection mode between the receiver 12 and the extraction boat 20 is shown. See Figure 3.
- a suction port 31 formed at the upper part of the accumulator 5 is a boat connected to the refrigerant circuit and sucking the refrigerant, and a pipe 32 extends from a lower part of the accumulator 5 and has a distal end.
- An extraction port 23 is provided at the top of the compressor 1.
- a discharge port 34 formed at the top of the compressor 1 is a boat connected to the refrigerant circuit to discharge the refrigerant.
- a pipe 35 extends from the lower surface of the compressor 1 and is provided with an extraction port 22 at the tip thereof. Ports 37 and 38 are ports that are connected to the refrigerant circuit and absorb and discharge refrigerant, respectively.From the lower surface of the receiver 12, a pipe 39 extends and is extracted at the tip. 24 are provided.
- the residual impurities are residual oils such as cutting oil, oil forming oil, pipe expanding oil, and processing oil that are contained in a refrigerant system other than the refrigerating machine oil. It also contains residual foreign substances such as gold and abrasion powders and bolimers.
- Figure 4 shows the washing effect in the case of using only the operation time and the number of times of start and stop as parameters in the form of the accumulated amount of residual impurities (mg).
- the cleaning effect was greater when the number of starts and stops was increased than when the operation time was extended.
- it is better to repeat the cleaning operation three times, starting and stopping 20 times during the operation time of 2 hours, than to repeat the cleaning operation three times during the operation time of 24 hours. was big. Therefore, it has been clarified that the residual impurities in the refrigerant system can be removed in a shorter time than before by increasing the number of starts and stops.
- the differential pressure ⁇ between the discharge boat 34 (high pressure side) of the compressor 1 and the suction port 31 (low pressure side) of the accumulator 5 is proportional to the discharge pressure. Residual impurities remaining in the motor (between the laminates) are now easily extruded. Therefore, it is clear that increasing the discharge pressure to increase the differential pressure ⁇ ⁇ ⁇ is effective for enhancing the cleaning effect.
- a cleaning operation mode switch 41 is provided in the printed wiring board 40 of the outdoor unit A, and the control unit 50 ( Performs a series of cleaning operation controls as shown below.
- the cleaning operation mode switch 41 is turned ON (Step S1). Accordingly, a counter (not shown) for counting the number of operations N and a timer (not shown) for measuring the operation time t are initialized.
- the outside air temperature Te measured by the temperature sensor Te is compared with a predetermined temperature T1 (step S2). If the outside air temperature Te is equal to or higher than the predetermined temperature T1 in step 2, the four-way switching valve 4 is switched to the cooling operation side to perform the cleaning operation in the cooling mode (step S3). The switching valve 4 is switched to the heating operation side, and the cleaning operation is performed in the heating mode (step S4).
- step S5 the discharge pipe temperature Td and the condensing temperature Tc are respectively compared with the set temperature T2, and if the discharge pipe temperature Td or the condensing temperature Tc is lower than the set temperature T2, the inverter 52
- the operating frequency of the compressor 1 is increased by controlling (step S6). If the discharge pipe temperature Td or the condensation temperature Dc is higher than the set temperature T2, or if the operation frequency is increased in Step S6 and Dd or Tc becomes higher than D2, the process proceeds to Step S7.
- the discharge pipe temperature Td is obtained by converting the pressure detected by the pressure sensor P1 provided in the discharge pipe 2 into a temperature.
- a temperature sensor can be provided instead of the pressure sensor -P1 to directly measure the discharge pipe temperature Td.
- the condensing temperature Tc is the temperature of the outdoor heat exchanger 9 or the indoor heat exchanger 18 detected by the temperature sensor TC1 or D2 (TC1 in the cooling mode, TC2 in the heating mode).
- the operation is continued until the operation time t elapses 60 minutes to warm the refrigerant and oil, and when the number of operations N is the second or subsequent time, In this case, since the refrigerant and oil have already been warmed, the operation continues until the operation time t has elapsed 10 minutes.
- step S8 the operation is stopped for 3 minutes, and the process proceeds to step S9. If the number of operations N exceeds the set number n1 in step S9, the process proceeds to step S10. If the number of operations N is less than the set number n1, the process returns to step S5 and repeats the above operation.
- the set number nl is set to, for example, 20.
- step S10 an alarm is displayed. Then, the operation is stopped in step S11.
- the oil is exchanged in the extraction / filling boats 22, 23, and 24 provided in the compressor 1, the accumulator 5, and the receiver 12.
- the extraction / filling ports 22, 23, 24 have a pinch brazing or the like.
- an extraction / filling port for extracting / filling oil in a portion of the refrigerant circuit, such as the bottom of the compressor 1, the accumulator 5, and the receiver 12, where oil accumulation is likely to occur. Since 2, 2, 3, and 24 are provided, there is no need to remove and reassemble the compression contact 1, the accumulator 5, and the receiver 1 2 from the air conditioner itself, and extract and fill oil. Work becomes easier than before. In addition, it is possible to reduce costs by improving workability in this way.
- the discharge temperature T d the discharge temperature T d.
- the condensing temperature T c and the operation time t are controlled to a constant temperature and a constant time, and the stop of the operation is determined during the fixed operation time.
- the cleaning operation control repeated a number of times the residual impurities in the refrigerant circuit can be removed in a shorter time than before, and the cleaning effect can be enhanced.
- cost reduction is achieved by shortening the cleaning time.
- By improving the washing effect it is possible to improve the reliability of the pressure reducer such as the capillary tube and the electric expansion valve and to protect the compressor.
- extraction / filling ports 22, 23, and 24 for extracting and filling oil are provided at the bottom of the compressor 1, the accumulator 5, and the receiver 12, respectively. It may be provided in one part, and may be provided in another part as long as it is a part where oil pools easily occur in the refrigerant circuit. Further, the boats 22, 23, and 24 may be any that can extract and fill oil and can be opened and closed.
- a cleaning operation mode switch 41 is installed in the printed wiring board 40 of the outdoor unit to control the cleaning operation in the cleaning operation mode.However, as shown in Fig. 7, a cleaning operation mode switch is provided. Instead, the above-described series of cleaning operation controls may be performed using the current forced cooling or forced heating operation mode on the printed wiring board 42 in contact with the outside of the room.
- step 5 of FIG. 5 both the discharge pipe temperature Td and the condensing temperature Tc are detected, and it is determined whether or not either of them has exceeded the predetermined temperature T2.
- Step S5 in FIG. 5 is interchangeable with step S15 or step S25 in FIG. 5A.
- the discharge pipe temperature d instead of detecting both the discharge pipe temperature Td and the condensing temperature Tc, only the discharge pipe temperature d may be detected and it may be determined whether or not it has exceeded the predetermined temperature T2 (see FIG. 5A Step S15).
- the differential pressure ⁇ ⁇ between the high-pressure side pressure and the low-pressure side pressure of the compression connection 1 is calculated from the output from the pressure sensor P 1 in the discharge pipe 2 and the output from the pressure sensor P 2 in the suction pipe 3. Then, it may be determined whether or not the differential pressure P is equal to or more than a predetermined value Vp (step S25 in FIG. 5B). Further, a temperature sensor may be used instead of the various pressure sensors P1 to P9 used in this embodiment.
- the present invention is used for an apparatus having a refrigerant circuit, such as an air conditioner and a refrigerator.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95934877A EP0787958A4 (en) | 1994-10-25 | 1995-10-24 | AIR CONDITIONING APPARATUS AND METHOD FOR CONTROLLING WASHING OPERATION THEREOF |
JP51378296A JP3915123B2 (ja) | 1994-10-25 | 1995-10-24 | 空気調和機ならびにその洗浄運転制御方法 |
US08/817,774 US5806329A (en) | 1994-10-25 | 1995-10-24 | Air conditioner and washing operation thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6/299143 | 1994-10-25 | ||
JP29914394 | 1994-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996012921A1 true WO1996012921A1 (fr) | 1996-05-02 |
Family
ID=17868686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1995/002181 WO1996012921A1 (fr) | 1994-10-25 | 1995-10-24 | Appareil de conditionnement de l'air et procede pour controler l'operation de lavage de celui-ci |
Country Status (4)
Country | Link |
---|---|
US (1) | US5806329A (ja) |
EP (1) | EP0787958A4 (ja) |
JP (1) | JP3915123B2 (ja) |
WO (1) | WO1996012921A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002357377A (ja) * | 2001-03-28 | 2002-12-13 | Mitsubishi Electric Corp | 配管洗浄装置および配管洗浄方法 |
US6609390B1 (en) | 1998-09-30 | 2003-08-26 | Daikin Industries, Ltd. | Two-refrigerant refrigerating device |
JP2007032964A (ja) * | 2005-07-28 | 2007-02-08 | Mitsubishi Electric Corp | マルチ型空気調和装置 |
JP2012007883A (ja) * | 2011-08-18 | 2012-01-12 | Mitsubishi Electric Corp | 冷凍サイクル装置及び冷凍サイクル装置の製造方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001084064A1 (fr) * | 2000-04-28 | 2001-11-08 | Daikin Industries, Ltd. | Procede de commande de collecte de frigorigene et d'huile et unite de commande de collecte de frigorigene et d'huile |
JP2004263885A (ja) * | 2003-02-07 | 2004-09-24 | Daikin Ind Ltd | 冷媒配管の洗浄方法、空気調和装置の更新方法、及び、空気調和装置 |
JP2004354017A (ja) * | 2003-05-30 | 2004-12-16 | Sanyo Electric Co Ltd | 冷却装置 |
EP2562491B1 (en) * | 2011-08-24 | 2019-05-01 | Mahle International GmbH | Filling system for transferring refrigerant to a refrigeration system and method of operating a filling system |
US20140026600A1 (en) * | 2012-07-25 | 2014-01-30 | Erik A. Wippler | Hvac system of an automotive vehicle and method of operating the same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH04198676A (ja) * | 1990-11-29 | 1992-07-20 | Yoshinori Satomura | 冷媒システム洗浄装置 |
JPH0566482U (ja) * | 1992-02-07 | 1993-09-03 | 三菱重工業株式会社 | アキュムレ−タ |
JPH05321613A (ja) * | 1992-05-25 | 1993-12-07 | Mitsubishi Heavy Ind Ltd | 熱利用装置及びそのための不純物除去装置 |
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GB882114A (en) * | 1957-03-25 | 1961-11-15 | Primore Sales Inc | Improvements in or relating to refrigeration systems |
US4698983A (en) * | 1986-06-11 | 1987-10-13 | Ruben Hechavarria | Modified compressor unit |
SU1744383A1 (ru) * | 1988-07-04 | 1992-06-30 | Опытно-Конструкторское Технологическое Бюро "Укрторгтехника" | Способ мойки внутренних полостей испарителей холодильных машин |
WO1991019140A1 (en) * | 1990-05-25 | 1991-12-12 | Environmental Products Amalgamated Pty. Ltd. | Apparatus for conditioning gas, particularly refrigerant |
US5168720A (en) * | 1990-09-26 | 1992-12-08 | Technical Chemical Company | Refrigerant recovery system with flush mode and associated flushing adapter apparatus |
DE4331769A1 (de) * | 1993-09-18 | 1995-03-23 | Behr Gmbh & Co | Spülanlage für Kältemittel enthaltende Einrichtungen |
-
1995
- 1995-10-24 US US08/817,774 patent/US5806329A/en not_active Expired - Lifetime
- 1995-10-24 JP JP51378296A patent/JP3915123B2/ja not_active Expired - Lifetime
- 1995-10-24 WO PCT/JP1995/002181 patent/WO1996012921A1/ja not_active Application Discontinuation
- 1995-10-24 EP EP95934877A patent/EP0787958A4/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04198676A (ja) * | 1990-11-29 | 1992-07-20 | Yoshinori Satomura | 冷媒システム洗浄装置 |
JPH0566482U (ja) * | 1992-02-07 | 1993-09-03 | 三菱重工業株式会社 | アキュムレ−タ |
JPH05321613A (ja) * | 1992-05-25 | 1993-12-07 | Mitsubishi Heavy Ind Ltd | 熱利用装置及びそのための不純物除去装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0787958A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6609390B1 (en) | 1998-09-30 | 2003-08-26 | Daikin Industries, Ltd. | Two-refrigerant refrigerating device |
JP2002357377A (ja) * | 2001-03-28 | 2002-12-13 | Mitsubishi Electric Corp | 配管洗浄装置および配管洗浄方法 |
JP2007032964A (ja) * | 2005-07-28 | 2007-02-08 | Mitsubishi Electric Corp | マルチ型空気調和装置 |
JP2012007883A (ja) * | 2011-08-18 | 2012-01-12 | Mitsubishi Electric Corp | 冷凍サイクル装置及び冷凍サイクル装置の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP0787958A4 (en) | 1998-09-09 |
JP3915123B2 (ja) | 2007-05-16 |
US5806329A (en) | 1998-09-15 |
EP0787958A1 (en) | 1997-08-06 |
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