WO2004076945A1 - 冷凍サイクル装置 - Google Patents
冷凍サイクル装置 Download PDFInfo
- Publication number
- WO2004076945A1 WO2004076945A1 PCT/JP2004/002062 JP2004002062W WO2004076945A1 WO 2004076945 A1 WO2004076945 A1 WO 2004076945A1 JP 2004002062 W JP2004002062 W JP 2004002062W WO 2004076945 A1 WO2004076945 A1 WO 2004076945A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- pipes
- pipe
- equalizing
- compressors
- Prior art date
Links
Classifications
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- 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
- F25B13/00—Compression machines, plants or systems, with reversible 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
- F25B1/00—Compression machines, plants or systems with non-reversible 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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
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- 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
- F25B43/04—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for withdrawing non-condensible gases
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/006—Compression machines, plants or systems with reversible cycle not otherwise provided for two pipes connecting the outdoor side to the indoor side with multiple indoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
- F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel arrangements
-
- 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
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0401—Refrigeration circuit bypassing means for the compressor
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- 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
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
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- 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
- F25B2500/06—Damage
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- 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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/03—Oil level
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2105—Oil temperatures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Definitions
- the present invention relates to a refrigeration cycle apparatus including a plurality of r-pressure compressors in which oil is accommodated in a case.
- a refrigerating cycle device comprising a plurality of high-pressure compressors in which a case contains lubricating oil, and connecting a discharge pipe and a suction pipe of these compressors to each other.
- the amount of the lubricating oil mixed with the refrigerant and discharged from each compressor and the amount of the lubricating oil returned to each compressor become unbalanced, which may cause an oil shortage in the compressor.
- Insufficient oil causes the sliding parts of the compressor to run out of oil, adversely affecting the life of the compressor
- a refrigeration cycle in which a single collecting pipe is connected to each oil equalizing pipe connected to each compressor via a thunderbolt type opening / closing valve, and the vertex is connected to the suction pipe of each compressor.
- Le device power is s (for example, Japanese 2 0 0 2 - 2 4 2 8 3 3 JP)
- a refrigerating cycle in which one collecting pipe is connected to the oil equalizing pipe connected to each compressor via an electronic opening / closing valve, and the collecting pipe is branched and connected to the suction pipe of each compressor.
- the refrigeration cycle apparatus includes a compressor.
- the refrigeration cycle device includes:
- a first decompressor provided on each of the first oil equalizing pipes
- a second decompressor provided in each of the second equalizing pipes;
- a bypass pipe connected between the high-pressure side pipe and the gas-liquid separator;
- a third decompressor provided in the bypass pipe
- FIG. 1 is a diagram illustrating a configuration of a first embodiment.
- FIG. 2 is a diagram illustrating a configuration of a second embodiment.
- FIG. 3 is a diagram showing a configuration of a third embodiment.
- FIG. 4 is a flowchart for explaining the operation of the third embodiment.
- the refrigeration cycle device 1 is an air conditioner including an outdoor unit 2 and an indoor unit 3.
- the outdoor unit 2 includes compressors 4 a and 4 b, an oil separator 7, a four-way valve 9, an outdoor heat exchanger 10, a liquid tank 11, an accumulator 16, and an outdoor fan 2. 0, the outdoor control unit 50, and the inverters 51, 52.
- the indoor unit 3 includes an electronic expansion valve 13, an indoor heat exchanger 14, an indoor fan 30, an indoor control unit (not shown), and the like.
- the outdoor unit 2 and the indoor unit 3 are connected by a liquid pipe 12 and a gas pipe 15.
- the outdoor controller 50 controls the operation of the outdoor unit 2.
- the inverters 51 and 52 rectify the voltage of the commercial AC power supply 53 and convert the rectified voltage to an AC power having a frequency in accordance with a command from the outdoor control unit 50.
- the compressors 4a and 4b, which convert the pressure into pressure and output the pressure, are of variable capacity and are driven by the outputs of the inverters 51 and 52, respectively.
- the compressors 4a and 4b are high-pressure compressors in which the pressure inside the case becomes high during the operation Is.
- the oil L for lubrication is stored in the case.
- the refrigerant discharge of the compressors 4a and 4b mouth is ejection big 5 a, 5 b force s their respective connections, these discharge pipe 5 a, 5 b is connected to the high-pressure side pipe 6.
- suction pipes 18a and 18b are connected to the refrigerant suction ports of the compressors 4a and 4b, and these suction pipes 18a
- Suction cups 19a and 19b are connected to 18b.
- One end of the first oil equalizing pipes 41a, 41b is connected to a predetermined height position on the side surface of the case of the compressors 4a, 4b, and is connected to the oil equalizing pipes 41a, 41b.
- first pressure reducer such as a cavity tube 43 a and 43 b
- first temperature sensors T1a and Tib are provided downstream of the capillary tubes 43a and 43b.
- the other ends of the oil equalizing pipes 41a and 41b are collectively connected to a buffer tank 44 which is a gas-liquid separator.
- the buffer tank 44 has a function of separating gas and liquid, and temporarily stores excess oil L flowing from the oil equalizing pipes 41a and 41b. store.
- the -end of the second oil equalizing pipe 45 is connected to the bottom of the buffer tank 44, and the other end of the oil equalizing pipe 45 branches into two oil equalizing pipes 45a45b and the suction pipe 18
- a third temperature detection sensor T2 for detecting the temperature of the oil L flowing out of the buffer tank 44 is attached to one end of the second oil leveling pipe 45 connected to a, 18 It has been done.
- Oil equalizing pipes 45a and 45b are provided with second pressure reducers, for example, capillary tubes 46a and 46b.
- a degree sensor T3 is attached at a position downstream of the capillary tube 48 in FIG.
- the diameter of the notch tank 44 is larger than those of the oil equalizing pipes 41 a 41 b, the oil equalizing pipes 45, 45a, 45b, and the noise pipe 47. are doing.
- the resistance of 46 b is smaller than the resistance of the capillary tubes 43 a and 43 b in the oil equalizing pipes 41 a and 41 b, and is smaller than the resistance of the capillary tube 48 in the bypass path 47. Is also small. Therefore, the oil L in the buffer tank 44 is equal to the oil leveling pipes 45a, 4b.
- One end of the oil return pipe 71 is connected to a predetermined height position on a side surface of the oil separator 7.
- the oil return pipe 71 is provided with a cable tubing 73.
- the oil L in the oil separator 7 accumulated above the connection position of the oil return pipe 7 1 flows into the oil return pipe 7 1, and flows into the oil equalization pipe 4 5 via the cable tubing 7 3. I do.
- the oil L that has flowed into the oil equalizing pipe 45 is split into the oil equalizing pipes 45a and 45b, and flows into the suction pipes 18a and 18b through the capillary tubing 46a and 46b. Then, the refrigerant is sucked into the compressors 4a and 4b together with the refrigerant circulated through the refrigeration cycle.
- the oil return pipe 72 is connected to the lower part of the oil separator 7.
- the oil return pipe 72 is provided with an open / close valve 74 and a cavity tube 75.
- the refrigerant discharged from the compressors 4a and 4b flows through the discharge pipes 5a and 5b to the high pressure side pipe 6, and the high pressure side pipe 6 to the oil separator 7.
- the oil separator 7 separates the refrigerant and the oil L, and the refrigerant in the oil separator 7 flows to the four-way valve 9.
- the refrigerant flowing through the four-way valve 9 flows into the outdoor heat exchanger 10 during the cooling operation, and exchanges heat with outdoor air in the outdoor heat exchanger 10 to condense (liquefy).
- the refrigerant that has passed through the outdoor heat exchanger 10 flows to the indoor unit 3 through the liquid tank 11, the back valve 21 a, the liquid pipe 12, and the packed nozzle 21 c in this order.
- the refrigerant that has flowed into the indoor unit 3 flows through the expansion valve 13 to the indoor heat exchanger 14, where it exchanges heat with indoor air to be vaporized.
- Indoor heat The refrigerant that has passed through the exchanger 14 is packed, packed, valves 21d, and gas pipes 1
- the refrigerant flows in the opposite direction by switching the four-way valve 9.
- the excess oil L beyond the connection position is regarded as surplus.
- the oil L that has flowed into the oil equalizing pipes 41a and 41b flows into the no-funk tank 44 via the capillary tubes 43a and 43b.
- a small amount of high-pressure refrigerant gas flows into the buffer tank 44 from the high-pressure side pipe 6 through the bypass pipe 47.
- the oil L flowing into the buffer tank 44 receives the pressure applied through the bypass pipe 47, the suction pipes 18 a, 18 b, the oil equalizing pipes 45, 45 b and the oil equalizing pipe 45.
- the oil flows out to the oil equalizing pipe 45 and is diverted therefrom to the oil equalizing pipes 45a and 45b.
- the separated oil flows into the suction pipes 18a and 18b via the capillary tubes 46a and 46b.
- the oil L flowing into the suction pipes 18a and 18b is sucked into the compressors 4a and 4b through the suction pipes 19a and 19b together with the refrigerant circulating in the refrigeration cycle. .
- the oil level in the case of compressor 4a is the same as the connection position of oil equalizing pipe 4 1a.
- Oil level in the case of the compressors 4a and 4b, such that the oil level in the case of the compressor 4b is lower than the connection position of the oil equalizing pipe 41b. May be biased.
- the oil L flows into the oil equalizing pipe 41a on the compressor 4a side
- the high-pressure refrigerant gas flows into the oil equalizing pipe 4b on the compressor 4b side.
- the refrigerant gas is collected in the buffer tank 44.
- the collected oil L and the refrigerant gas are separated from each other in the buffer tank 44, and when flowing out of the buffer tank 44, they are mixed and flow into the oil equalizing pipe 45.
- the mixed oil and refrigerant flowing into the oil equalizing pipe 45 are equally divided into the oil equalizing pipes 45a and 45b by the resistance action of the capillary tubes 46a and 46b.
- the oil moves from the compressor 4a on the side with a larger amount of oil to the compressor 4b on the side with a smaller amount of oil, and the oil in the cases of the compressors 4a and 4b.
- the surface level quickly changes.
- an oil tank 60 is used instead of the oil tank 44 in the first embodiment. Then, at a predetermined height on the side of the oil tank 60,
- the oil L that exceeds the connection position of the oil equalizing pipe 45 flows into the oil equalizing pipe 45 as surplus.
- the oil L that has flowed into the oil equalizing pipes 4 5 is
- the refrigerant flows through the suction pipes 18a and 18b via the 46a and 46b, and circulates through the refrigeration cycle. Both are sucked into the compressors 4a and 4b.
- the oil tank 60 has basically the same function as the buffer tank 44 in the first embodiment, but the oil L capacity is larger than the buffer tank 44 in particular. It has the following features.
- the oil tank 60 can store a predetermined amount or more of oil L, the amount of oil L flowing out of the compressors 4a and 4b increases due to a change in operation conditions and the like. Even if it does, the oil L can be quickly supplied to the compressors 4a and 4b without delaying the increase.
- the supply of the oil L from the oil tank 60 is faster than the case where the oil L in the oil separator 7 is supplied through the oil return pipe 71.
- an air conditioner is composed of a plurality of outdoor units 2a and 2b and a plurality of indoor units 3.
- the outdoor unit 2a has the same configuration as the outdoor unit 2 of the second embodiment, and has compressors 4a and 4b.
- the outdoor unit 2b also has the same configuration as the outdoor unit 2 of the second embodiment, and has compressors 4a and 4b.
- the first on-off valve V 1 is connected in parallel with the capillary tube 48 in the bypass pipe 47 for each of the outdoor units 2 a and 2 b.
- the third oil equalizing pipe 61 is connected from the bottom of the oil tank 48 to the low pressure side pipe 17 and the second open / close valve V2 and the third open / close are connected to the oil equalizing pipe 61.
- Valve V 3 is provided for each of the outdoor units 2a and 2b.
- the series circuit of the capillary tube 33 and the check valve 34 is connected in parallel.
- O Balance tube 3 1 is connected via 1 e, 2 1 e
- an imbalance in oil amount may occur between the outdoor units 2a and 2b.
- the amount of oil in the compressor of the outdoor unit 2a increases, and the amount of oil in the compressor of the outdoor unit 2b may become insufficient.
- the oil L flows into the equalizing pipes 41a and 41b, and the oil L flows into the oil tank 60. Then, the oil L in the oil tank 60 flows into the oil equalizing pipe 45 and is supplied to the suction sides of the compressors 4a and 4b.
- the refrigerant flowing into the oil equalizing pipes 41a and 41b is not oil L but refrigerant, and the oil level in the oil tank 60 is also high. Decreases. Therefore, the refrigerant flows from the oil tank 60 into the oil equalizing pipe 45.
- the temperature of the oil L or the refrigerant flowing into the oil equalizing pipes 4 1 a and 41 b is detected by the temperature sensors T la and T ib, and the temperature of the oil L or the refrigerant flowing into the oil equalizing pipe 45 is detected by the temperature sensor T 2. Detected by The detected temperatures of these temperature sensors T la, T ib, and T 2 are higher when the oil L passes than when the refrigerant passes. The temperature of the refrigerant flowing through the bypass pipe 47 is detected by the temperature sensor T3. As shown in the flow chart of FIG. 4, the compressors 2a and 2b
- the oil amount of each compressor in the outdoor units 2a, 2b is detected based on the detected temperatures of the temperature sensors T1aTib, T2, ⁇ 3 (step 102). ) o Detection was performed every minute, but detection is always possible.
- the oil L flows into the oil equalizing pipes 41a and 41b and the oil equalizing pipe 45, respectively, and the detected temperatures of the temperature sensors T la, T ib and T 2 are reduced.
- the temperature becomes higher than the temperature detected by the temperature sensor T3 (the temperature of the refrigerant flowing through the bypass pipe 47), and the following relationship is established. Note that 1>] 3 1> 0.
- the detected temperatures of the sensors T la, T ib, and T 2 are detected by the temperature sensors ⁇ 3 (the refrigerant flowing through the bypass pipe 47). Temperature), and the following relationship is established. Note that a2 is ⁇ 2 and hi2 is 0.
- the oil amount in each compressor can be detected based on the relationship between the detected temperatures.
- the outdoor unit 2 a and 2 b for example, the outdoor unit 2 a (if oil shortage is detected (NO in step 103)), the outdoor unit 2 a V And the on-off valves V 1 and V 3 of the outdoor unit 2b are opened for the same constant time t (step 104). Step 105). Then, the flag f is set to "1" as an index that the opening / closing valves V1, V2, and V3 have opened (step 106).
- the oil L stored in the oil tank 60 of the outdoor unit 2b is supplied to the oil equalizing pipe 61.
- Flows into the parallel pipe 31 via The oil L flowing into the balance pipe 31 is discharged by the open / close valve V2 of the outdoor unit 2a on the side where the oil amount is insufficient, so that the low pressure side pipe 17 of the outdoor unit 2a is opened. Is led to.
- the oil L guided to the low pressure side pipe 17 is sucked into the compressors 4a and 4b.
- Oil amount detection is continued every minute.
- Step 103 Y E S), if the flag f is (step 1
- the oil tanks 60 of the outdoor units 2a and 2b are By adjusting the fixed time t during which the on-off valves VI, V2, V3, which are shared by both outdoor units 2a, 2b, are opened, the oil tank 6 1 Supply of these oils L: It can be limited to the required amount only. In this case, it is possible to avoid the shortage of oil L on the outdoor unit that supplies oil L.
- the same oil amount detection and oil amount balance can be executed only by increasing the temperature sensor T 1 by the number of compressors.
- the temperature detected by the temperature sensor # 3 attached to the bypass pipe 47 is used for detecting the oil amount.
- the compressor 4a, 4 At least one of the discharge pipes 5a and 5b of b
- the detected temperature may be used for oil pressure detection.
- the pressure sensor ⁇ d is attached to the high pressure side piping 6 and the refrigerant ⁇ is detected from the detected pressure of the pressure sensor.
- the temperature detected by the temperature sensor T 2 attached to the oil equalizing pipe 45 was used for oil level detection, but without using the temperature sensor T 2, the oil temperature in the oil equalizing pipe 45 was measured by the bypass pipe 47. n Captured from the sensor T3, the captured temperature may be used for oil prediction.
- the present invention is not limited to the above embodiments.
- the present invention can be used for, for example, an air conditioner.
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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)
- Compressor (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2005502867A JP4323484B2 (ja) | 2003-02-27 | 2004-02-23 | 冷凍サイクル装置 |
ES04713659T ES2382736T3 (es) | 2003-02-27 | 2004-02-23 | Aparato de ciclo de refrigeración |
EP04713659A EP1605211B1 (en) | 2003-02-27 | 2004-02-23 | Refrigeration cycle apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-051317 | 2003-02-27 | ||
JP2003051317 | 2003-02-27 |
Publications (1)
Publication Number | Publication Date |
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WO2004076945A1 true WO2004076945A1 (ja) | 2004-09-10 |
Family
ID=32923364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/002062 WO2004076945A1 (ja) | 2003-02-27 | 2004-02-23 | 冷凍サイクル装置 |
Country Status (7)
Country | Link |
---|---|
EP (2) | EP1605211B1 (ja) |
JP (1) | JP4323484B2 (ja) |
KR (1) | KR100694915B1 (ja) |
CN (1) | CN100344915C (ja) |
ES (2) | ES2407651T3 (ja) |
RU (1) | RU2297577C2 (ja) |
WO (1) | WO2004076945A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100758901B1 (ko) | 2004-11-17 | 2007-09-14 | 엘지전자 주식회사 | 멀티형 공기조화기 |
JP2008537718A (ja) * | 2005-04-08 | 2008-09-25 | エア プロダクツ アンド ケミカルズ インコーポレイテッド | 製品の配送および担体の返送のための効率的なシステムおよび方法 |
JP2008256333A (ja) * | 2007-04-09 | 2008-10-23 | Mitsubishi Electric Corp | 冷凍サイクル装置 |
WO2011099628A1 (ja) * | 2010-02-15 | 2011-08-18 | 東芝キヤリア株式会社 | 空気調和機 |
KR101203848B1 (ko) | 2005-08-31 | 2012-11-21 | 엘지전자 주식회사 | 멀티형 공기조화기의 압축기 오일 회수장치 |
WO2014045394A1 (ja) * | 2012-09-21 | 2014-03-27 | 三菱電機株式会社 | 冷凍装置 |
WO2015025514A1 (ja) * | 2013-08-19 | 2015-02-26 | ダイキン工業株式会社 | 冷凍装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
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- 2004-02-23 KR KR1020057015656A patent/KR100694915B1/ko active IP Right Grant
- 2004-02-23 EP EP04713659A patent/EP1605211B1/en not_active Expired - Lifetime
- 2004-02-23 WO PCT/JP2004/002062 patent/WO2004076945A1/ja active Application Filing
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US7721559B2 (en) | 2004-11-17 | 2010-05-25 | Lg Electronics Inc. | Multi-type air conditioner and method for controlling the same |
KR100758901B1 (ko) | 2004-11-17 | 2007-09-14 | 엘지전자 주식회사 | 멀티형 공기조화기 |
US7784502B2 (en) | 2005-04-08 | 2010-08-31 | Air Products And Chemicals, Inc. | Method and system of supply and delivery of product contained in a carrier |
US7775245B2 (en) | 2005-04-08 | 2010-08-17 | Air Products And Chemicals, Inc. | Secure loop system and method for supply and delivery of product contained in a carrier |
US7784501B2 (en) | 2005-04-08 | 2010-08-31 | Air Products And Chemicals, Inc. | Efficient system and method for delivery of product and return of carrier |
JP2008537718A (ja) * | 2005-04-08 | 2008-09-25 | エア プロダクツ アンド ケミカルズ インコーポレイテッド | 製品の配送および担体の返送のための効率的なシステムおよび方法 |
JP4791529B2 (ja) * | 2005-04-08 | 2011-10-12 | エア プロダクツ アンド ケミカルズ インコーポレイテッド | 製品の配送および担体の返送のための効率的なシステム |
KR101203848B1 (ko) | 2005-08-31 | 2012-11-21 | 엘지전자 주식회사 | 멀티형 공기조화기의 압축기 오일 회수장치 |
JP2008256333A (ja) * | 2007-04-09 | 2008-10-23 | Mitsubishi Electric Corp | 冷凍サイクル装置 |
WO2011099628A1 (ja) * | 2010-02-15 | 2011-08-18 | 東芝キヤリア株式会社 | 空気調和機 |
JP5655014B2 (ja) * | 2010-02-15 | 2015-01-14 | 東芝キヤリア株式会社 | 空気調和機 |
WO2014045394A1 (ja) * | 2012-09-21 | 2014-03-27 | 三菱電機株式会社 | 冷凍装置 |
JP5819000B2 (ja) * | 2012-09-21 | 2015-11-18 | 三菱電機株式会社 | 冷凍装置 |
WO2015025514A1 (ja) * | 2013-08-19 | 2015-02-26 | ダイキン工業株式会社 | 冷凍装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1605211A1 (en) | 2005-12-14 |
ES2407651T3 (es) | 2013-06-13 |
ES2382736T3 (es) | 2012-06-13 |
RU2297577C2 (ru) | 2007-04-20 |
EP2397793B1 (en) | 2013-05-01 |
JP4323484B2 (ja) | 2009-09-02 |
EP2397793A1 (en) | 2011-12-21 |
EP1605211B1 (en) | 2012-04-18 |
KR20050107451A (ko) | 2005-11-11 |
JPWO2004076945A1 (ja) | 2006-06-08 |
CN100344915C (zh) | 2007-10-24 |
KR100694915B1 (ko) | 2007-03-14 |
RU2005126948A (ru) | 2006-01-20 |
EP1605211A4 (en) | 2010-11-17 |
CN1751213A (zh) | 2006-03-22 |
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