WO2006109617A1 - エジェクタ式冷凍サイクル用ユニット - Google Patents
エジェクタ式冷凍サイクル用ユニット Download PDFInfo
- Publication number
- WO2006109617A1 WO2006109617A1 PCT/JP2006/307092 JP2006307092W WO2006109617A1 WO 2006109617 A1 WO2006109617 A1 WO 2006109617A1 JP 2006307092 W JP2006307092 W JP 2006307092W WO 2006109617 A1 WO2006109617 A1 WO 2006109617A1
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- WO
- WIPO (PCT)
- Prior art keywords
- refrigerant
- ejector
- evaporator
- unit
- tank
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
- F28D1/05391—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators
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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
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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
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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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
- F25B41/00—Fluid-circulation 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
- F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
- F25B5/04—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in series
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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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/08—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using ejectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0202—Header boxes having their inner space divided by partitions
- F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H2001/3286—Constructional features
- B60H2001/3298—Ejector-type refrigerant circuits
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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
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/001—Ejectors not being used as compression device
- F25B2341/0011—Ejectors with the cooled primary flow at reduced or low pressure
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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
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/001—Ejectors not being used as compression device
- F25B2341/0012—Ejectors with the cooled primary flow at high pressure
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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
- F25B2400/23—Separators
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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
- F25B2500/01—Geometry problems, e.g. for reducing size
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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
- F25B2500/18—Optimization, e.g. high integration of refrigeration components
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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
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
Definitions
- the present invention relates to an ejector-type refrigeration cycle unit having an ejector that serves as a refrigerant decompression unit and a refrigerant circulation unit.
- an ejector-type refrigeration cycle having an ejector that functions as a refrigerant decompression unit and a refrigerant circulation unit is known.
- This ejector-type refrigeration cycle is effective when applied to, for example, a vehicle air conditioner or a vehicle refrigeration device that freezes and refrigerates on-board luggage.
- the ejector refrigeration cycle is effective when applied to a stationary refrigeration cycle system such as an air conditioner, a refrigerator, and a freezer.
- Patent Document 1 This type of ejector refrigeration cycle is known from Patent Document 1 and the like.
- a first evaporator is disposed on the outlet side of an ejector that functions as refrigerant decompression means and refrigerant circulation means, and a gas-liquid separator is disposed on the outlet side of the first evaporator.
- An ejector-type refrigeration cycle in which a second evaporator is disposed between the liquid refrigerant outlet side of the gas-liquid separator and the refrigerant suction port of the ejector is disclosed.
- the gas-phase refrigerant discharged from the second evaporator is sucked and expanded using the pressure drop generated by the high-speed flow of the refrigerant during expansion.
- the speed energy of the refrigerant at the time is converted into pressure energy by the diffuser part (pressure raising part) of the ejector to increase the refrigerant pressure, so that the driving power of the compressor can be reduced. For this reason, the operating efficiency of the cycle can be improved.
- first and second evaporators can exert an endothermic (cooling) action on separate spaces or the first and second evaporators in the same space.
- Patent Document 1 Japanese Patent No. 3322263
- Patent Document 1 describes each component machine in the concrete description of the ejector refrigeration cycle. What is the specific power of how to assemble the vessel?
- an object of the present invention is to improve mountability in an ejector refrigeration cycle.
- Another object of the present invention is to improve the cooling performance in the ejector refrigeration cycle.
- the refrigerant is sucked from the refrigerant suction port (14b) by the high-speed refrigerant flow injected from the nozzle part (14a), and is injected from the nozzle part (14a).
- the ejector (14) that mixes and discharges the refrigerant sucked from the refrigerant suction port (14b), and the refrigerant sucked by the ejector (14) or discharged from the ejector (14). Equipped with evaporators (15, 18) to evaporate the refrigerant,
- the evaporators (15, 18) and the ejector (14) are integrally assembled to form an integrated unit (20), which is characterized by a unit for the ejector type refrigeration cycle.
- the whole integral unit (20) including the ejector (14) and at least one evaporator (15, 18) can be handled as an integral object. Therefore, it is possible to perform the mounting work when mounting the ejector-type refrigeration cycle on the application target such as a vehicle very efficiently.
- integrated assembly of the ejector (14) and the at least one evaporator (15, 18) means that both members are mechanically coupled as an “integral structure”. ing. This “integrated assembly” can be implemented in various ways as will be described later.
- the evaporator of the integrated unit (20) includes the refrigerant suction port (
- the evaporator (18) is connected to 14b) and evaporates the refrigerant sucked into the refrigerant suction port.
- the length of the passage between the outlet side of the evaporator (18) and the refrigerant suction port (14b) can be shortened by configuring the integral unit (20), so the evaporator (18) Pressure loss on the outlet side can be reduced. This reduces the evaporation pressure of the evaporator (18) and improves the cooling performance of the evaporator (18).
- the throttle (17, 17a, 17b) is disposed on the refrigerant flow inlet side of the evaporator (18) connected to the refrigerant suction port (14b), and depressurizes the refrigerant flow.
- the mechanism may be assembled to the integrated unit (20).
- the first evaporator (15) connected to the outlet side of the ejector (14) and evaporating the refrigerant discharged from the ejector and the refrigerant suction port (14b) are connected.
- a second evaporator (18) may be provided.
- the first evaporator (15) is assembled to the integrated unit (20).
- the cooling performance can be exhibited by the combination of the two evaporators (15) and (18) on the ejector discharge side and the ejector suction side, and the first evaporator (15) and the second evaporator (18) can be configured as an integrated unit (20), and effects such as improved workability can be achieved.
- the integrated unit (20) has a saddle configuration so as to have one refrigerant inlet (25) and one refrigerant outlet (26).
- the entire unit unit (20) can be connected to other refrigerant circuit components with only one refrigerant inlet (25) and one refrigerant outlet (26), and the efficiency of the mounting work It is very useful for conversion.
- the integrated unit (20) has one refrigerant inlet (25) and one refrigerant outlet (26), and the refrigerant inlet (25) is an inlet of the ejector (14).
- the first passage (25a) connected to the side and the second passage (16) connected to the inlet side of the throttle mechanism (17, 17a, 17b) can be branched.
- the refrigerant branched on the inlet side of the ejector (14) can be supplied to the second passage (16). Therefore, the refrigerant can be supplied to the second evaporator (18) by utilizing the compression function that is not limited to the refrigerant suction ability of the ejector (14). As a result, the input of the ejector (14) is small. Even when the load is low, the refrigerant flow rate on the second evaporator (18) side and thus the cooling performance of the second evaporator (18) can be easily secured. At the same time, the refrigerant flow rate on the second evaporator (18) side can be independently adjusted by the throttle mechanism (17, 17a, 17b).
- the refrigerant inlet (25) and the refrigerant outlet (26) are formed in one connection block (23).
- connection block (23) the joint function of the refrigerant inlet / outlet can be exerted on one connection block (23).
- first evaporator (15) can be arranged on the upstream side of the air flow
- second evaporator (18) can be arranged on the downstream side of the air flow.
- the ejector (14) is disposed inside the tank (18b) for distributing or collecting the refrigerant flow to the plurality of refrigerant passages of the evaporator (15, 18), the mounting space can be reduced. Can be realized even more.
- connection between the ejector (14) and the evaporator (15, 18) side refrigerant flow path can be easily performed without a connection pipe. Furthermore, since low-temperature low-pressure refrigerant flows in the tank (18b) of the evaporator (15, 18), it is not necessary to insulate the outer surface of the ejector (14)! Can also be demonstrated.
- the ejector (14) may be disposed in the dedicated tank (34).
- the integrated unit (20) of this invention can be comprised using the existing evaporator structure.
- the evaporator (18) connected to the refrigerant suction port (14b) may include a plurality of tanks (18b, 18c) for distributing or collecting the refrigerant flow to the plurality of refrigerant passages. Good. In this case, if the ejector (14) and the throttle mechanism (17a) are arranged in the same tank (18b) among the plurality of tanks (18b, 18c), the mounting space can be reduced. It can be realized more effectively.
- the mechanism (17a) may be disposed outside the tank (18b, 18c).
- the throttle mechanism may be a capillary tube (17a).
- the throttle mechanism may be a fixed throttle hole (17b).
- the evaporator (18) connected to the refrigerant suction port (14b) may have tanks (18b, 18c) for distributing or collecting refrigerant flows to a plurality of refrigerant passages.
- the ejector (14) can be arranged in the internal space (27) constituting the outlet of the refrigerant passage of the evaporator (18) among the internal spaces of the tanks (18b, 18c).
- the tank internal space (27) constituting the outlet portion of the refrigerant passage of the evaporator (18) can be directly connected to the ejector refrigerant suction port (14b) without connecting piping, it is integrated.
- the assembly of the unit (20) can be simplified.
- the evaporation pressure of the evaporator (18) can be reduced by this pressure loss reduction, and the cooling performance of the evaporator (18) is improved. it can.
- the first evaporator (15) and the second evaporator (18) are tanks (15b, 15c, 18b) for distributing or collecting refrigerant flows to a plurality of refrigerant passages. 18c), and the ejector (14) is a refrigerant passage of the second evaporator (18) in the internal space of the tank (18b, 18c) of the second evaporator (18).
- the connection block (24) which is disposed in the internal space (27) constituting the outlet portion of the second evaporator (14) and fixes the refrigerant outlet side portion of the ejector (14) is connected to the tank (18b, 18c) of the second evaporator (18).
- connection block (24) is formed with a communication hole (24c) communicating with the refrigerant outlet side passage of the ejector (14).
- the communication hole (24c) further includes the communication hole (24c).
- connection block (24) for fixing the refrigerant outlet side portion of the ejector (14) is connected to the refrigerant outlet side passage of the ejector (14) and the refrigerant passage of the first evaporator (15). It is possible to have a role of communicating with the tank internal space (32) constituting the part.
- the first evaporator (15) and the second evaporator (18) are tanks (15b) for distributing or collecting refrigerant flows to a plurality of refrigerant passages. 15c, 18b, 18c)
- the ejector (14) is an inner part of the internal space of the tank (18b, 18c) of the second evaporator (18) that constitutes the outlet of the refrigerant passage of the second evaporator (18). Placed in space (27)
- the second evaporator (18) is disposed at the end opposite to the internal space (27) where the ejector (14) is disposed. 18) and the cut off communication space (52d).
- the refrigerant outlet side passage of the ejector (14) is connected to the first evaporator (15) via the communication space (52d). ) Communicating with the internal space (32) constituting the inlet portion of the refrigerant passage.
- the refrigerant is sucked from the refrigerant suction port (14b) by the high-speed refrigerant flow injected from the nozzle part (14a), and the refrigerant injected from the nozzle part (14a) And an ejector (14) that mixes and discharges the refrigerant sucked from the refrigerant suction port (14b), and vaporizes the refrigerant discharged from the ejector connected to the outlet side of the ejector (14).
- a second evaporator (18) connected to the refrigerant suction port (14b) and evaporating the refrigerant sucked into the ejector (14);
- the first evaporator (15), the second evaporator (18), the cage ejector (14), and the capillary tube (17a) are assembled together to form an integrated cabinet unit (20). It is characterized by being.
- the cooling performance can be exhibited by the combination of the two evaporators (15, 18) on the ejector outlet side and the ejector suction side, and the two evaporators (15, 18), the ejector (14) and the integrated unit (20) including the capillary tube (17a) that forms the throttle mechanism for the second evaporator can be configured, and the effects of improving the mounting workability can be exhibited more effectively. wear.
- the first evaporator (15) and the second evaporator (18) have tanks (15b, 15c, 18b, 18c) for distributing or collecting the refrigerant flow to a plurality of refrigerant passages,
- the tanks (15b, 15c) of the first evaporator (15) and the tanks (18b, 18c) of the second evaporator (18) are disposed adjacent to each other in the air flow direction, and the first evaporator ( A trough (51) extending in the longitudinal direction of the tank is formed between the tank (15b, 15c) of 15) and the tank (18b, 18c) of the second evaporator (18),
- the capillary tube (17a) is disposed in the valley (51), and the tank (15b, 15c
- the integrated unit (20) can be effectively downsized even if the configuration is such that the capillary tube (17a) is arranged outside the tank.
- the ejector mixes the high-speed refrigerant flow injected from the nozzle portion (14a) and the refrigerant sucked from the refrigerant suction port (14b).
- a mixing section (14c) and a pressure increasing section (14d) for converting the velocity energy of the refrigerant flow mixed in the mixing section (14c) into pressure energy can be provided.
- the heat exchange core portions (15a, 18a) of the evaporators (15, 18) may be configured by a laminated structure of flat tubes (21) and corrugated fins (22).
- the heat exchange core portions (15a, 18a) of the evaporators (15, 18) are specifically the hole portions of the flat plate fins (220).
- the heat exchange core portions (15a, 18a) of the evaporators (15, 18) are specifically the hole portions of the flat plate fins (220).
- the plate fin type heat exchange structure that joins the tube (221) in a skewer shape.
- the heat exchange core portions (15a, 18a) of the evaporators (15, 18) have a serpentine type heat exchange structure having a tube (230) bent in a meandering manner. Make it.
- the ejector-type refrigeration cycle unit can also be called an ejector-type refrigeration cycle evaporator unit or an ejector-equipped evaporator unit.
- the ejector-type refrigeration cycle unit is connected to a condenser, which is another component of the refrigeration cycle, and a compressor via a pipe in order to configure a refrigeration cycle including the ejector.
- the projector-type refrigeration cycle unit is used as an indoor unit for cooling air.
- the ejector-type refrigeration cycle unit can be used as an outdoor unit in another form.
- FIG. 1 to 4 show a first embodiment of the present invention
- FIG. 1 shows an example in which an ejector refrigeration cycle 10 according to the first embodiment is applied to a refrigeration cycle apparatus for a vehicle.
- a compressor 11 that sucks and compresses refrigerant is rotationally driven by a vehicle travel engine (not shown) via an electromagnetic clutch 11a, a belt, and the like.
- the compressor 11 may be a variable capacity compressor that can adjust the refrigerant discharge capacity by changing the discharge capacity, or the refrigerant discharge capacity by changing the operation rate of the compressor operation by intermittently connecting the electromagnetic clutch 11a. Any of the fixed capacity compressors to be adjusted may be used. If an electric compressor is used as the compressor 11, the refrigerant discharge is achieved by adjusting the rotation speed of the electric motor. You can adjust the output ability.
- a radiator 12 is disposed on the refrigerant discharge side of the compressor 11.
- the radiator 12 cools the high-pressure refrigerant by exchanging heat between the high-pressure refrigerant discharged from the compressor 11 and outside air (air outside the passenger compartment) blown by a cooling fan (not shown).
- the refrigerant of the ejector refrigeration cycle 10 in the present embodiment, a refrigerant whose high pressure does not exceed the critical pressure, such as a refrigerant of chlorofluorocarbon and HC, is used. Is configured. For this reason, the radiator 12 acts as a condenser that condenses the refrigerant.
- a liquid receiver 12a On the outlet side of the radiator 12, a liquid receiver 12a is provided.
- this liquid receiver 12a has a vertically long tank shape, and constitutes a gas-liquid separator that separates the gas-liquid refrigerant and accumulates excess liquid refrigerant in the cycle.
- the liquid refrigerant is led out from the lower side inside the tank shape to the outlet of the liquid receiver 12a.
- the liquid receiver 12a is provided integrally with the radiator 12 in this example.
- radiator 12 a heat exchanger for condensation located on the upstream side of the refrigerant flow, and a receiver 12a for introducing the refrigerant from the heat exchanger for condensation to separate the gas and liquid of the refrigerant
- a known configuration having a supercooling heat exchange section for supercooling the saturated liquid refrigerant from the liquid receiver 12a may be adopted.
- a temperature type expansion valve 13 is arranged on the outlet side of the liquid receiver 12a.
- the temperature type expansion valve 13 is a pressure reducing means for reducing the pressure of the liquid refrigerant from the liquid receiver 12a, and has a temperature sensing part 13a arranged in the suction side passage of the compressor 11.
- the temperature type expansion valve 13 detects the degree of superheat of the compressor suction side refrigerant based on the temperature and pressure of the suction side refrigerant (evaporator outlet side refrigerant described later) of the compressor 11, The valve opening (refrigerant flow rate) is adjusted so that the degree of superheat of the refrigerant on the compressor suction side becomes a predetermined value set in advance.
- An ejector 14 is arranged on the outlet side of the temperature type expansion valve 13.
- the ejector 14 is a decompression means for decompressing the refrigerant, and is also a refrigerant circulation means (momentum transport type pump) for transporting the fluid by circulating the refrigerant by a suction action (convolution action) of the refrigerant flow ejected at high speed.
- the ejector 14 includes a nozzle portion 14a for reducing the passage area of the refrigerant (intermediate pressure refrigerant) after passing through the expansion valve 13 to further expand the refrigerant under reduced pressure, and a refrigerant outlet of the nozzle portion 14a.
- a refrigerant suction port 14b that is disposed in the same space and sucks a gas-phase refrigerant from the second evaporator 18 described later is provided.
- a mixing unit 14c that mixes the high-speed refrigerant flow from the nozzle unit 14a and the suction refrigerant from the refrigerant suction port 14b is provided in the refrigerant flow downstream portion of the nozzle unit 14a and the refrigerant suction port 14b.
- a diffuser portion 14d that forms a pressure increasing portion is disposed downstream of the refrigerant flow in the mixing portion 14c.
- the diffuser portion 14d is formed in a shape that gradually increases the passage area of the refrigerant, and functions to decelerate the refrigerant flow to increase the refrigerant pressure, that is, to convert the velocity energy of the refrigerant into pressure energy.
- the first evaporator 15 is connected to the outlet side of the diffuser portion 14 d of the ejector 14, and the outlet side of the first evaporator 15 is connected to the suction side of the compressor 11.
- a refrigerant branch passage 16 is branched from the inlet side of the ejector 14 (an intermediate portion between the outlet side of the thermal expansion valve 13 and the inlet side of the ejector 14), and the downstream side of the refrigerant branch passage 16 is It is connected to the refrigerant suction port 14b of the ejector 14.
- Z indicates the branch point of the refrigerant branch passage 16.
- a throttle mechanism 17 is arranged in the refrigerant branch passage 16, and a second evaporator 18 is arranged downstream of the refrigerant flow from the throttle mechanism 17.
- the throttle mechanism 17 is a pressure reducing means for adjusting the flow rate of the refrigerant to the second evaporator 18, and can be specifically configured by a fixed throttle such as a capillary tube or an orifice.
- the two evaporators 15 and 18 are assembled into an integral structure with the configuration described later.
- the two evaporators 15 and 18 are housed in a case (not shown), and air (cooled air) is blown as indicated by an arrow A by an electric blower 19 common to the air passage configured in the case.
- the blown air is cooled by the two evaporators 15 and 18.
- the vehicle interior space is the space to be cooled.
- the space inside the refrigeration refrigerator of the refrigeration vehicle is a space to be cooled.
- FIG. 2 is a perspective view showing an outline of the overall configuration of the integrated unit 20
- FIG. 4 is a longitudinal (longitudinal) cross-sectional view of the upper tank portion of the evaporators 15 and 18, and
- FIG. 4 is a transverse cross-sectional view of the upper tank portion of the second evaporator 18.
- the two evaporators 15 and 18 are completely integrated as one evaporator structure. Therefore, the first evaporator 15 constitutes an upstream region of the air flow A in one evaporator structure, and the second evaporator 18 constitutes a downstream region of the air flow A in one evaporator structure. Come to compose.
- the basic configurations of the first evaporator 15 and the second evaporator 18 are the same.
- the heat exchanger cores 15a to 18a and the tank tanks located on both upper and lower sides of the heat exchange cores 15a to 18a are respectively provided.
- each of the heat exchange core portions 15a and 18a includes a plurality of tubes 21 extending in the vertical direction. Between the plurality of tubes 21, a passage through which the heat exchange medium, in this embodiment, air to be cooled, is formed.
- the fins 22 can be disposed between the plurality of tubes 21 so that the tubes 21 and the fins 22 can be joined.
- the heat exchange core portions 15a and 18a have a laminated structure of tubes 21 and fins 22.
- the tubes 21 and the fins 22 are alternately stacked in the left-right direction of the heat exchange core portions 15a and 18a. In other embodiments, a configuration without the fins 22 may be employed.
- FIG. 2 only a part of the laminated structure of the tube 21 and the fin 22 is illustrated.
- a laminated structure of the tube 21 and the fins 22 is formed in the entire area of the replacement core parts 15a and 18a, and the blown air of the electric blower 19 passes through the gap of the laminated structure.
- the tube 21 constitutes a refrigerant passage, and is made of a flat tube whose cross-sectional shape is flat along the air flow direction A.
- the fin 22 is a corrugated fin formed by bending a thin plate material into a wave shape, and is joined to the flat outer surface side of the tube 21 to expand the air-side heat transfer area.
- the tube 21 of the heat exchange core portion 15a and the tube 21 of the heat exchange core portion 18a constitute independent refrigerant passages, and tank portions 15b, 15c on both the upper and lower sides of the first evaporator 15 and the second steam
- the tank portions 18b, 18c on the upper and lower sides of the generator 18 constitute independent refrigerant passage spaces.
- the tank portions 15b and 15c on both the upper and lower sides of the first evaporator 15 have tube fitting holes (not shown) into which the upper and lower ends of the tube 21 of the heat exchange core portion 15a are inserted and joined.
- the upper and lower ends of the tube 21 communicate with the internal space of the tank portions 15b and 15c.
- tank portions 18b and 18c on both the upper and lower sides of the second evaporator 18 are tube fitting hole portions (not shown) into which the upper and lower end portions of the tube 21 of the heat exchange core portion 18a are inserted and joined.
- the upper and lower ends of the tube 21 communicate with the internal spaces of the tank portions 18b and 18c.
- the tank portions 15b, 15c, 18b, 18c on both the upper and lower sides distribute the refrigerant flow to the plurality of tubes 21 of the corresponding heat exchange core portions 15a, 18a, and the plurality of tubes 21.
- the two upper tanks 15b, 18b and the two lower tanks 15c, 18c are adjacent to each other, the two upper tanks 15b, 18b and the two lower tanks 15c, 18c are integrally formed. can do.
- the two upper tanks 15b and 18b and the two lower tanks 15c and 18c may be formed as independent members.
- the capillary tube 17a that constitutes the rotary mechanism 17 is also assembled integrally with the first and second evaporators 15 and 18 by brazing.
- the ejector 14 forms a highly accurate micro passage in the nozzle portion 14a, when the ejector 14 is brazed, a high temperature during brazing (a brazing temperature of aluminum: 600) The nozzle portion 14a is thermally deformed at around ° C), and the passage shape and dimensions of the nozzle portion 14a cannot be maintained as designed.
- ejector 14 is integrally brazed with first and second evaporators 15 and 18, first and second connection blocks 23 and 24, and capillary tube 17a, it is moved to the evaporator side. It is designed to be assembled.
- the capillary tube 17a and the first and second connection blocks 23, 24 is formed of an aluminum material in the same manner as the evaporator parts.
- the first connection block 23 is a member that is brazed and fixed to one side surface in the longitudinal direction of the upper tanks 15b and 18b of the first and second evaporators 15 and 18. 1 constitutes one refrigerant inlet 25 and one refrigerant outlet 26 of the unitary unit 20 shown in FIG.
- the refrigerant inlet 25 is directed toward the inlet side of the ejector 14.
- the main passage 25a that forms the first passage and the inlet force toward the inlet side of the capillary tube 17a.
- branch passage 16 Branches to branch passage 16 forming the second passage.
- This branch passage 16 corresponds to the entrance of the branch passage 16 in FIG. Accordingly, the branch point Z in FIG. 1 is configured inside the first connection block 23.
- the refrigerant outlet 26 is constituted by one simple passage hole (circular hole or the like) that penetrates the first connection block 23 in the thickness direction.
- the branch passage 16 of the first connection block 23 is connected to one end of the capillary tube 17a (FIG. 2).
- the second connection block 24 is a member that is disposed at a substantially central portion in the longitudinal direction of the internal space of the upper tank 18b of the second evaporator 18 and is brazed to the inner wall surface of the upper tank 18b.
- the second connection block 24 serves to partition the inner space of the upper tank 18b into two spaces in the tank longitudinal direction, that is, the left space 27 and the right space 28.
- the other end side (right end side) of the capillary tube 17a passes through the support hole 24a of the second connection block 24 and opens into the right space 28 of the upper tank 18b as shown in FIG. is doing. Since the space between the outer peripheral surface of the capillary tube 17a and the support hole 24a is sealed by brazing, the space between the left and right spaces 27 and 28 remains blocked.
- the nozzle portion 14a is formed of a material such as stainless steel or brass, and portions other than the nozzle portion 14a (housing portion forming the refrigerant suction port 14b, mixing portion 14c, diff user portion 14d, etc.) It is made of a metal material such as copper or aluminum, but may be made of a resin (non-metal material).
- the ejector 14 passes through the hole shapes of the refrigerant inlet 25 and the main passage 25a of the first connection block 23 after the assembly process (brazing process) for integrally brazing the first and second evaporators 15 and 18 and the like. Into the upper tank 18b.
- the distal end portion of the ejector 14 in the longitudinal direction is a portion corresponding to the exit portion of the diffuser portion 14d in FIG. 1, and this ejector distal end portion is inserted into the circular recess 24b of the second connection block 24, Sealed with O-ring 29a.
- the ejector tip communicates with the communication hole 24c of the second connection block 24.
- a partition plate 30 is disposed at a substantially central portion in the longitudinal direction of the internal space of the upper tank 15b of the first evaporator 15, and the partition plate 30 divides the internal space of the upper tank 15b into two spaces in the longitudinal direction. That is, the left space 31 and the right space 32 are partitioned.
- the communication hole 24c of the second connection block 24 communicates with the right space 32 of the upper tank 15b of the first evaporator 15 through the through hole 33a of the intermediate wall surface 33 of both the upper tanks 15b and 18b.
- the left end in the longitudinal direction of the ejector 14 corresponds to the inlet of the nozzle portion 14a in FIG. 1, and this left end uses the O-ring 29b to form the first connection block 23. It fits on the inner wall surface of the main passage 25a and is fixed with a seal.
- the ejector 14 may be fixed in the longitudinal direction using, for example, screw fixing means (not shown).
- the O-ring 29a is held in the groove (not shown) of the second connection block 24, and the O-ring 29b is held in the groove (not shown) of the first connection block 23.
- the refrigerant outlet 26 communicates with the left space 31 of the upper tank 15b
- the main passage 25a communicates with the left space 27 of the upper tank 18b
- the branch passage 16 has a capillary tube. Brazed to side walls of upper tanks 15b and 18b in communication with one end of 17a Be lost.
- the refrigerant suction port 14b of the ejector 14 communicates with the left space 27 of the upper tank 18b of the second evaporator 18.
- the second connection block 24 divides the inside of the upper tank portion 18b of the second evaporator 18 into left and right spaces 27, 28, and the left space 27 collects refrigerant from the plurality of tubes 21.
- the right space 28 serves as a distribution tank that distributes the refrigerant to a plurality of tubes 21.
- the ejector 14 has an elongated cylindrical shape extending in the axial direction of the nozzle portion 14a, and the ejector 14 is configured such that the longitudinal direction of the elongated cylindrical shape coincides with the longitudinal direction of the upper tank portion 18b. It is installed in parallel with the upper tank 18b.
- the ejector 14 and the evaporator 18 can be arranged in a compact manner, and as a result, the physique of the entire unit can be gathered in a compact manner.
- the ejector 14 is also disposed in the left space 27 that forms the collecting tank, and the refrigerant suction port 14b is directly opened in the left space 27 that forms the collecting tank. This configuration makes it possible to reduce refrigerant piping.
- This configuration provides an advantage that the collection of the refrigerant from the plurality of tubes 21 and the supply of the refrigerant to the ejector 14 (refrigerant suction) can be realized with one tank.
- the first evaporator 15 is provided adjacent to the second evaporator 18, and the downstream end of the ejector 14 is connected to the distribution tank (upper tank) of the first evaporator 15. It is installed adjacent to the right side space 32) of part 15.
- the refrigerant flow of the entire unit 20 in the above configuration will be described in detail with reference to Figs. 2 and 3.
- the refrigerant inlet 25 of the first connection block 23 branches into the main passage 25a and the branch passage 16. Is done.
- the refrigerant in the main passage 25a first passes through the ejector 14 (nozzle part 14a ⁇ mixing part 14c ⁇ diff user part 14d) and is depressurized, and the low-pressure refrigerant after this depressurization is connected to the communication hole 24c of the second connection block 24, in the middle. It flows into the right space 32 of the upper tank 15b of the first evaporator 15 as shown by the arrow a through the through hole 33a of the wall surface 33.
- the refrigerant in the right space 32 descends the plurality of tubes 21 on the right side of the heat exchange core portion 15a as indicated by arrow b and flows into the right side in the lower tank 15c. Since no partition plate is provided in the lower tank 15c, the refrigerant moves from the right side of the lower tank 15c to the left side as indicated by an arrow c.
- the refrigerant on the left side of the lower tank 15c moves up the plurality of tubes 21 on the left side of the heat exchange core part 15a as shown by the arrow d and flows into the left space 31 of the upper tank 15b.
- the refrigerant also flows to the refrigerant outlet 26 of the first connection block 23 as shown by an arrow e.
- the refrigerant in the branch passage 16 of the first connection block 23 is first depressurized through the capillary tube 17a, and the depressurized low-pressure refrigerant is second evaporator 18 as shown by an arrow f.
- the refrigerant in the branch passage 16 of the first connection block 23 is first depressurized through the capillary tube 17a, and the depressurized low-pressure refrigerant is second evaporator 18 as shown by an arrow f.
- the refrigerant in the branch passage 16 of the first connection block 23 is first depressurized through the capillary tube 17a, and the depressurized low-pressure refrigerant is second evaporator 18 as shown by an arrow f.
- the refrigerant in the right space 28 descends the plurality of tubes 21 on the right side of the heat exchange core portion 18a as indicated by the arrow g and flows into the right side in the lower tank 18c. Since no partition plate is provided in the lower tank 18c, the refrigerant moves from the right side of the lower tank 18c to the left side as indicated by an arrow h.
- the refrigerant on the left side of the lower tank 18c moves up the plurality of tubes 21 on the left side of the heat exchange core 18a as indicated by arrow i and flows into the left space 27 of the upper tank 18b. Since the refrigerant suction port 14b of the ejector 14 communicates with the left space 27, the refrigerant in the left space 27 is sucked into the ejector 14 from the refrigerant suction port 14b.
- the integrated unit 20 has the above-described refrigerant flow path configuration, only one refrigerant inlet 25 is provided in the first connection block 23 as the entire integrated unit 20, and the refrigerant outlet 26 is sufficient. It is sufficient to provide only one for the first connection block 23.
- the compressor 11 When the compressor 11 is driven by the vehicle engine, the high-temperature and high-pressure refrigerant compressed and discharged by the compressor 11 flows into the radiator 12. In the heat radiator 12, the high-temperature refrigerant is cooled and condensed by the outside air. The high-pressure refrigerant that has flowed out of the radiator 12 flows into the receiver 12a, and the gas-liquid refrigerant is separated in the receiver 12a, and the liquid refrigerant is led out from the receiver 12a and passes through the expansion valve 13. .
- valve opening (refrigerant flow rate) is adjusted so that the degree of superheat of the outlet refrigerant (compressor suction refrigerant) of the first evaporator 15 becomes a predetermined value, and the high-pressure refrigerant is decompressed. .
- This expansion valve 1 The refrigerant (intermediate pressure refrigerant) after passing through 3 flows into one refrigerant inlet 25 provided in the first connection block 23 of the integrated unit 20.
- the refrigerant flow is directed toward the ejector 14 from the main passage 25a of the first connection block 23 and from the refrigerant branch passage 16 of the first connection block 23 toward the capillary tube 17a. Split into refrigerant flow.
- the refrigerant flow flowing into the ejector 14 is decompressed and expanded by the nozzle portion 14a. Accordingly, the pressure energy of the refrigerant is converted into velocity energy at the nozzle portion 14a, and the refrigerant is also ejected at a high velocity in the nozzle part 14a. Due to the refrigerant pressure drop at this time, the refrigerant (gas-phase refrigerant) after passing through the second evaporator 18 in the branch refrigerant passage 16 is sucked from the refrigerant suction port 14b.
- the refrigerant that has flowed out of the diffuser portion 14d of the ejector 14 flows through the refrigerant flow paths indicated by arrows a to e in FIG.
- the low-temperature low-pressure refrigerant absorbs the blast air force in the direction of arrow A and evaporates.
- the vapor phase refrigerant after evaporation is sucked into the compressor 11 from one refrigerant outlet 26 and is compressed again.
- the refrigerant flow that has flowed into the refrigerant branch passage 16 is depressurized by the capillary tube 17a to become a low-pressure refrigerant, and this low-pressure refrigerant enters the refrigerant flow path of arrows f to i in FIG. Refrigerant flows.
- the low-temperature low-pressure refrigerant absorbs heat from the blown air that has passed through the first evaporator 15 and evaporates.
- the vapor phase refrigerant after the evaporation is sucked into the ejector 14 from the refrigerant suction port 14b.
- the cooling medium downstream of the diffuser portion 14d of the ejector 14 is supplied to the first evaporator 15, and the refrigerant on the branch passage 16 side is supplied to the capillary tube (throttle mechanism). Since it can also be supplied to the second evaporator 18 through 17a, the first and second evaporators 15 and 18 can simultaneously exert a cooling action. Therefore, it is cooled by both the first and second evaporators 15 and 18. The cooled cold air is blown out into the space to be cooled, and the space to be cooled can be cooled (cooled).
- the refrigerant evaporation pressure of the first evaporator 15 is the pressure after being increased by the diffuser portion 14d, while the outlet side of the second evaporator 18 is connected to the refrigerant suction port 14b of the ejector 14. Therefore, the lowest pressure immediately after the pressure reduction in the nozzle portion 14a can be applied to the second evaporator 18.
- the refrigerant evaporation pressure (refrigerant evaporation temperature) of the second evaporator 18 can be made lower than the refrigerant evaporation pressure (refrigerant evaporation temperature) of the first evaporator 15.
- the first evaporator 15 having a high refrigerant evaporation temperature with respect to the flow direction A of the blown air is arranged on the upstream side, and the second evaporator 18 having a low refrigerant evaporation temperature is arranged on the downstream side. It is possible to secure both the temperature difference between the refrigerant evaporation temperature and the blown air in the first evaporator 15 and the temperature difference between the refrigerant evaporation temperature and the blown air in the second evaporator 18.
- both the cooling performances of the first and second evaporators 15 and 18 can be effectively exhibited. Therefore, the cooling performance for the common cooling target space can be effectively improved by combining the first and second evaporators 15 and 18. Further, the suction pressure of the compressor 11 can be increased by the pressure increasing action in the diffuser portion 14d, and the driving power of the compressor 11 can be reduced.
- the refrigerant flow rate on the second evaporator 18 side can be independently adjusted by a capillary tube (throttle mechanism) 17 that does not depend on the function of the ejector 14, and the refrigerant flow rate to the first evaporator 15 can be adjusted. Adjustable with 14 aperture characteristics. Therefore, the refrigerant flow rate to the first and second evaporators 15 and 18 can be easily adjusted according to the respective heat loads.
- the refrigerant after passing through the expansion valve 13 is branched at the upstream portion of the ejector 14, and the branched refrigerant is sucked into the refrigerant suction port 14b through the refrigerant branch passage 16.
- the refrigerant branch passage 16 is connected in parallel to the ejector 14.
- the compressor 11 has only the refrigerant suction capacity of the ejector 14 in the refrigerant branch passage 16.
- the refrigerant can be supplied also using the refrigerant suction and discharge capabilities.
- the degree of decrease in the refrigerant flow rate on the second evaporator 18 side is smaller than the cycle of Patent Document 1. it can. Therefore, it is easy to ensure the cooling performance of the second evaporator 18 even under low heat load conditions.
- FIG. 5 is a comparative example, and is an example in which the integral unit 20 is not configured in the ejector refrigeration cycle 10 similar to the present embodiment. That is, in the comparative example of FIG. 5, the ejector 14, the first evaporator 15, the second evaporator 18, and the throttle mechanism 17 (specifically, the capillary tube 17a that forms a fixed throttle) are configured as independent components. In addition, each of these parts is independently fixed to a chassis part such as a vehicle body, and these parts are connected to each other by pipes.
- a chassis part such as a vehicle body
- the ejector 14, the first and second evaporators 15 and 18, and the fixed tube 17a that forms a fixed throttle as shown in FIG.
- the single unit 20 is assembled so that only one refrigerant inlet 25 and one refrigerant outlet 26 are provided as a whole.
- the mountability of the ejector refrigeration cycle 10 having a plurality of evaporators 15 and 18 on the vehicle can be significantly improved as compared with the comparative example of FIG. Compared with the comparative example of FIG. 5, the number of vital parts can be reduced to reduce costs.
- the following effects such as the improvement of the cooling performance can be exhibited by adopting the integrated unit 20 as follows.
- the length of the connection passage between the various components (14, 15, 18, 17a) can be reduced to a very small amount, so that the pressure loss of the refrigerant flow path can be reduced and at the same time the low-pressure refrigerant. Heat exchange with the surrounding atmosphere can be effectively reduced.
- the cooling performance of the first and second evaporators 15 and 18 can be improved.
- the evaporation pressure of the second evaporator 18 can be reduced by the pressure loss reduction due to the abolition of the connection pipe between the outlet side and the ejector refrigerant suction port 14b.
- the cooling performance of the second evaporator 18 can be effectively improved without increasing the compressor power.
- the heat insulation treatment (attaching the heat insulating material) of the ejector 14 can be eliminated.
- a capillary tube 17a is disposed between the branch passage 16 of the first connection block 23 of the integrated housing unit 20 and the inlet side of the second evaporator 18, and the capillary tube 17a
- a capillary tube is used as the pressure reducing means of the second evaporator 18.
- 17a is not used, and instead, the branch passage 16 of the first connection block 23 is provided with a fixed restricting hole 17b such as an orifice for restricting the passage area to a predetermined amount, and accordingly, the capillary tube of the first embodiment is provided.
- a connecting pipe 160 having a passage diameter larger than that of the capillary tube 17a is arranged at the arrangement site of 17a.
- the low-pressure refrigerant depressurized by the fixed throttle hole 17b formed in the branch passage 16 of the first connection block 23 is passed through the connection pipe 160 to the right space 28 of the upper tank 18b of the second evaporator 18.
- the other refrigerant flow paths are the first embodiment. It is the same as the state. Therefore, the use of the integrated unit 20 can exhibit the same effects as those of the first embodiment.
- the ejector 14 and the capillary tube 17a are both arranged in a common tank, that is, in the upper tank 18b of the second evaporator 18, but in the third embodiment, FIG. As shown in FIG. 11, only the capillary tube 17a is arranged in the upper tank 18b of the second evaporator 18, whereas the ejector 14 is arranged in a separate tank 34 for exclusive use.
- the second connection block 24 in the first embodiment is eliminated, and instead, the longitudinal center in the upper tank 18b is removed.
- a partition plate 35 is disposed in the section, and the partition plate 35 partitions the internal space of the upper tank 18b to the left and right.
- the tip of the capillary tube 17a passes through the partition plate 35 and communicates with the right space 28 in the upper tank 18b.
- the separate tank 34 is disposed at an intermediate position between the upper tank 15b of the first evaporator 15 and the upper tank 18b of the second evaporator 18, and the longitudinal lengths of both tanks 15b and 18b.
- the separate tank 34 is integrally formed with the upper tanks 15b and 18b.
- the ejector 14 and this cylindrical separate tank 34 extend to the rear side (right side) of the partition plates 30 and 35 of both tanks 15b and 18b as shown in FIG. Section (the outlet section of the diffuser section 14d) passes through a through hole (horizontal hole) 34a that penetrates the circumferential wall of the separate tank 34 and communicates with the right space 32 of the upper tank 15b of the first evaporator 15. .
- the refrigerant suction port 14b of the ejector 14 also passes through a through hole (horizontal hole) 34b that penetrates the circumferential wall of another tank 34 and communicates with the left space 27 of the upper tank 18b of the second evaporator 18. ing.
- a refrigerant flow path similar to that in the first embodiment can be configured in a configuration in which the ejector 14 is disposed in a separate dedicated tank 34, and thus the same as in the first embodiment. The operational effects of can be demonstrated.
- the fourth embodiment is a modification of the third embodiment described above, in which the cylindrical tube 17a of the third embodiment is abolished, and instead of the fixed throttle hole 17b and the connecting pipe 160 in the second embodiment.
- a fixed throttle hole 17b is formed as a pressure reducing means in the branch passage 16 of the first connection block 23, and the downstream side of the fixed throttle hole 17b. Is connected to the right space 28 of the upper tank 18b of the second evaporator 18 through the connection pipe 160.
- each of the first to fourth embodiments a configuration is adopted in which the ejector 14 is arranged in the upper tank 18b of the second evaporator 18 or in another tank 34 adjacent to the upper tank 18b. Then, as shown in FIG. 15, the ejector 14 is configured in an external cassette portion 36 disposed outside the first and second evaporators 15 and 18.
- the cassette portion 36 forms an external member attached to the outside of the first and second evaporators 15 and 18, and is roughly divided into an ejector 14 portion and a lower case that accommodates the ejector 14 portion. And the upper case portion 38.
- the main body portion of the ejector 14 (portion in which the nozzle portion 14a is incorporated) is
- the main body of the ejector 14 can be made of metal such as aluminum or grease!
- seal materials Sl and S2 having O-ring force are arranged on the outer peripheral wall of the main body portion of the ejector 14.
- the main body portion of the ejector 14 may be formed in a shape such as a rectangular parallelepiped other than the cylindrical shape.
- a lower case portion 37 is fixed in advance to the side surfaces of the first and second evaporators 15 and 18.
- the lower case portion 37 is formed in a vertically long rectangular parallelepiped shape that closes the bottom surface portion and opens the top surface portion.
- the material of the lower case portion 37 may be a metal such as aluminum or a resin. Then, the lower case portion 37 is fixed to the side portions of the first and second evaporators 15 and 18 by means such as screwing.
- the ejector 14 part is inserted into the lower case part 37 from the upper surface opening of the lower case part 37 Insert into.
- the upper part of the ejector 14, that is, the part above the refrigerant suction port 14 b of the ejector 14 (the inlet side part of the nozzle part 14 a) protrudes above the lower case part 37.
- the upper case portion 38 is fitted as a lid member on the upper surface opening of the lower case portion 37 while the upper case portion 38 is fitted to the upward protruding portion of the ejector 14, and the upper case portion 38 and the lower case portion 37 are covered. Are fastened together by means such as screwing.
- the ejector 14 portion can be held and fixed in the lower case portion 37 and the upper case portion 38.
- the air flow direction A is shown as reversed from that shown in FIG. 2, etc., the left and right sides of the first and second evaporators 15, 18 are also reversed as compared with FIG.
- the upper case portion 38 is configured integrally with the function of the first connection block 23 in the first to fourth embodiments. That is, in the upper case portion 38, the refrigerant inlet 25 and the refrigerant outlet 26 are adjacently formed in parallel.
- the refrigerant inlet 25 is branched into a main passage 25a and a branch passage 16 toward the inlet side of the ejector 14 in the middle of the passage.
- a fixed throttle hole 17b is formed in the branch passage 16 as a pressure reducing means.
- the fixed throttle hole 17b is the same as the fixed throttle hole 17b in the second and fourth embodiments.
- the main passage 25a extends in the longitudinal direction (vertical direction) of the ejector 14 as the passage direction force of the refrigerant inlet 25 is also refracted in an L shape.
- a nozzle portion 14a, a mixing portion 14c, and a diffuser portion 14d of the ejector 14 are sequentially formed.
- the outlet portion of the ejector 14 (the outlet portion of the diffuser portion 14d) is positioned near the other end portion (lower end portion) of the ejector 14 in the longitudinal direction.
- the outlet of the ejector 14 is connected to one end of the connection pipe 39 through the communication hole 37a of the lower case part 37.
- the other end of the connection pipe 39 is the right space of the upper tank 15b of the first evaporator 15. Connected to section 32.
- the passage of the refrigerant outlet 26 of the upper case portion 38 is connected to the left space portion 31 of the upper tank 15b of the first evaporator 15.
- the refrigerant suction port 14b of the ejector 14 is formed so as to penetrate the wall surface of the main body portion of the ejector 14 in the radial direction, and communicates with the downstream portion of the nozzle portion 14a of the ejector 14. .
- the refrigerant suction port 14b is connected to one end of the connection pipe 40 through the communication hole 38a of the upper case section 38, and the other end of the connection pipe 40 is the left space 27 of the upper tank 18b of the second evaporator 18. Connected to.
- the outlet side of the fixed throttle hole 17b of the branch passage 16 is connected to the right space 28 of the upper tank 18b of the second evaporator 18 via the connection pipe 41.
- the refrigerant branched to the branch passage 16 side at the refrigerant inlet 25 and depressurized by the fixed throttle hole 17b passes through the connection pipe 41, and then flows through the second evaporator 18 by arrows f to i. It flows on the road and reaches the left space 27 of the upper tank 18b. Then, the left space 27 is sucked into the refrigerant suction port 14b of the ejector 14 through the connection pipe 40.
- the upper case portion 38 of the external cassette portion 36 is integrally formed with a portion corresponding to the first connection block 23.
- the first connection block 23 is provided as an external cassette. It is separated from the part 36 and configured as an independent part.
- the first connection block 23 is arranged on one (right) side of the left and right side portions of the first and second evaporators 15 and 18, and the other ( Place the external cassette part 36 on the side of the left side!
- the external cassette portion 36 is configured to hold and fix the ejector 14 portion in the lower case portion 37 and the upper case portion 38 as in the fifth embodiment.
- the upper case portion 38 is fixed in advance to one side surface portion of the first and second evaporators 15 and 18.
- the ejector 14 is inserted into the upper case portion 38 from the lower opening portion of the upper case portion 38, and then the lower case portion 37 is covered with the lower opening portion of the upper case portion 38 as a lid member. Both case parts 37 and 38 are fastened together by means such as screwing!
- the assembly direction of the ejector 14 is opposite to that of the fifth embodiment, and the ejector 14 is arranged such that the nozzle portion 14a side (inlet side) is downward and the diffuser portion 14d side (outlet side) is upward. Is assembled.
- the refrigerant suction port 14b of the ejector 14 is connected to the left side portion of the lower tank 18c of the second evaporator 18 through the communication hole 37b of the lower case portion 37.
- the diffuser portion 14d is connected to the left space portion 31 of the upper tank 15b of the first evaporator 15 through the communication hole 38b of the upper case portion 38.
- the refrigerant inlet 25 of the first connection block 23 is branched into a main passage 25a and a branch passage 16, and the main passage 25a is connected to the communication hole 37c of the lower case portion 37 of the external cassette portion 36 by the connection pipe 42.
- the communication hole 37c is connected to the inlet portion 43 of the nozzle portion 14a of the ejector 14.
- the branch passage 16 is connected to the right side portion of the lower tank 18c of the second evaporator 18 via a capillary tube 17a serving as pressure reducing means.
- the partition plate 35 of the upper tank 18b is abolished, and instead, the partition plate 35a is arranged at the center in the longitudinal (left-right) direction of the lower tank 18c. This partition plate 35a partitions the inner space of the lower tank 18c to the left and right.
- the low-pressure refrigerant that has passed through the capillary tube 17a flows through the second evaporator 18 through the refrigerant flow path indicated by arrows f to i, and then passes through the communication hole 37b from the left side of the lower tank 18c.
- the refrigerant is sucked into the refrigerant suction port 14b of the projector 14.
- the refrigerant in the main passage 25a of the refrigerant inlet 25 passes through the connection pipe 42, flows into the inlet portion 43 of the ejector 14 of the external cassette portion 36 through the communication hole 37c, and is decompressed by the nozzle portion 14a. It expands.
- the low-pressure refrigerant at the outlet of the ejector 14 flows into the left space 31 of the upper tank 15b of the first evaporator 15 through the communication hole 38b of the upper case 38.
- the low-pressure refrigerant flows in the first evaporator 15 through the refrigerant flow paths indicated by arrows a to d, and then flows to the refrigerant outlet 26 of the first connection block 23.
- the liquid receiver 12a is disposed on the outlet side of the radiator 12, and the expansion valve 13 is disposed on the outlet side of the liquid receiver 12a.
- the surplus refrigerant is separated by separating the gas-liquid refrigerant at the outlet side of the first evaporator 15.
- An accumulator 50 that is a gas-liquid separator that stores the gas as a liquid is provided, and the gas-phase refrigerant is led out from the accumulator 50 to the suction side of the compressor 11.
- the liquid receiver 12a and the expansion valve 13 are eliminated, so that the refrigerant inlet 25 of the integrated unit 20 may be directly connected to the outlet side of the radiator 12. . Then, the refrigerant outlet 26 of the integrated unit 20 may be connected to the inlet side of the accumulator, and the outlet side of the accumulator may be connected to the suction side of the compressor 11.
- the eighth embodiment is a modification of the seventh embodiment.
- the accumulator 50 is also integrally assembled as one element of the integrated unit 20, and the outlet of the accumulator 50 is integrated with the integrated unit 20.
- the entire refrigerant outlet 26 is configured.
- the branch passage 16 branched on the inlet side of the ejector 14 is connected to the refrigerant suction port 14b of the ejector 14, and the throttle mechanism 17 and the second evaporator 18 are connected to the branch passage 16.
- an accumulator 50 serving as a gas-liquid separator is provided on the outlet side of the first evaporator 15, and the liquid-phase refrigerant outlet portion of the accumulator 50 is provided in the ninth embodiment.
- a branch passage 16 is provided to connect 50a to the refrigerant suction port 14b of the ejector 14, and the throttle mechanism 17 and the second evaporator 18 are arranged in the branch passage 16.
- the ejector 14, the first and second evaporators 15, 18, the throttle mechanism 17 and the accumulator 50 constitute an integrated unit 20.
- one refrigerant inlet 25 is provided on the inlet side of the ejector 14, and this refrigerant inlet 25 is connected to the outlet side of the radiator 12.
- one refrigerant outlet 26 is provided at the gas-phase refrigerant outlet portion of the accumulator 50, and this refrigerant outlet 26 is connected to the suction side of the compressor 11.
- each includes the first evaporator 15 connected to the outlet side of the ejector 14 and the second evaporator 18 connected to the refrigerant suction port 14b of the ejector 14.
- an integrated unit 20 is configured in an ejector-type refrigeration cycle 10 that includes only an evaporator 18 connected to a refrigerant suction port 14b of an ejector 14.
- the integrated unit 20 of the tenth embodiment includes an ejector 14, an evaporator 18, a throttle mechanism 17, and an accumulator 50.
- the unit as a whole has one refrigerant inlet 25 and one refrigerant outlet 26. And have. That is, the tenth embodiment corresponds to a configuration in which the first evaporator 15 of the ninth embodiment is eliminated.
- the throttle mechanism 17 is also integrated in the integrated unit 20, but in the eleventh embodiment, as shown in FIG.
- the first and second evaporators 15 and 18 and the ejector 14 are configured, and the throttle mechanism 17 is provided separately from the integral unit 20.
- FIG. 22 shows a twelfth embodiment.
- an accumulator 50 that forms a gas-liquid separator is provided on the outlet side of the first evaporator 15, and the accumulator 50 is installed in the integrated unit 20. It ’s all in one. That is, in the twelfth embodiment, the ejector 14, the first and second evaporators 15, 18 and the accumulator 50 constitute an integral unit 20, and the throttling mechanism 17 is separated from the integral unit 20. Are provided independently.
- the heat exchange core portions 15a and 18a of the first and second evaporators 15 and 18 are configured by a laminated structure of flat tubes 21 and corrugated fins 22.
- the heat exchange core portions 15a and 18a of the first and second evaporators 15 and 18 are configured by a plate fin type heat exchange structure. .
- a flat tube having a flat cross section may be used as the tube 210, and the flat tube 210 may be fixed to the inner wall surface of the tube insertion hole (flat hole) 221 of the plate fin 220.
- FIG. 24 shows a fourteenth embodiment, in which the heat exchange core portions 15a, 18a of the first and second evaporators 15, 18 are configured with a serpentine type heat exchange structure.
- a flat multi-hole tube is used as the tube 230.
- the flat multi-hole tube 230 is formed by, for example, extruding an aluminum material and has a large number of refrigerant passage holes (not shown) formed in parallel in the flat cross-sectional shape of the tube material.
- FIG. 24 (a) is a first example of the fourteenth embodiment, in which the flat multi-hole tube 230 is bent and formed in a meandering manner, and the refrigerant inlet pipe 231 is joined to one end of the flat multi-hole tube 230.
- a refrigerant outlet pipe 232 is joined to the other end of the flat multi-hole tube 230.
- corrugated fins 22 are joined between adjacent straight tube portions, and air passes through the corrugated fin 22 portions.
- FIG. 24 (b) is a second example of the fourteenth embodiment.
- Two tubes are used as the flat multi-hole tube 230, and the two flat multi-hole tubes 230 are connected to the refrigerant inlet pipe 231. It is arranged in parallel with the refrigerant outlet pipe 232.
- the two flat multi-hole tubes 230 are configured as a two-pass type in which the refrigerant flows in parallel.
- FIGS. 25 to 27 show a fifteenth embodiment, corresponding to FIGS. 2 to 4 of the first embodiment.
- the in the first embodiment similarly to the ejector 14, the capillary tube 17a constituting the throttle mechanism 17 on the inlet side of the second evaporator 18 connected to the ejector suction side is used as the upper tank 18b of the second evaporator 18. Force Arranged Inside In the fifteenth embodiment, only the ejector 14 is arranged inside the upper tank 18b, and the capillary tube 17a is arranged outside the upper tank 18b.
- a capillary tube 17a is disposed in a trough 51 formed by the curved shape of the arc of the cross section of the upper tank 18b of the second evaporator (leeward side evaporator) 18.
- the capillary tube 17a is disposed in the valley 51 so as to contact the outer surfaces of the upper tanks 15b and 18b, and is fixed to the outer surfaces of the upper tanks 15b and 18b by integral brazing.
- the inlet side of the capillary tube 17a is connected to the branch passage 16 of the first connection block 23 outside the upper tanks 15b and 18b.
- the outlet side of the tube 17a passes through the wall of the right side surface of the upper tank 18b of the second evaporator (leeward side evaporator) 18 and passes through the upper tank. It communicates with the right space 28 of 18b.
- the above-described valley portion 51 is an unused dead space formed along the longitudinal direction of the upper tanks 15b and 18b and over the entire length in the tank longitudinal direction.
- the capillary tube 17a has a narrow tube shape extending in the longitudinal direction of the tank, the valley 51 is very convenient as a space for disposing the capillary tube 17a, and the cavity 51 is formed in the concave shape of the valley 51.
- the entire narrow tube shape of the billiary tube 17a can be stored.
- the capillary tube 17a is positioned outside the second evaporator tank, so that the second evaporator ( The refrigerant passage area in the upper tank 18b of the leeward side evaporator 18 can be increased by the amount of the capillary tube 17a, and the refrigerant passage resistance in the upper tank 18b can be reduced.
- (16th embodiment) 28 to 30 show the sixteenth embodiment.
- the cavity tube 17a in the fifteenth embodiment is abolished, and instead, the branch passage 16 of the first connection block 23 has an orifice that restricts the passage area to a predetermined amount.
- the fixed throttle hole 17b is provided.
- the connecting pipe 160 having a sufficiently larger passage diameter than that of the capillary tube 17a is arranged in the arrangement portion of the capillary tube 17a of the fifteenth embodiment, that is, in the valley portion 51.
- the connecting pipe 160 is fixed to the outer surfaces of the upper tanks 15b and 18b by integral brazing, similarly to the capillary tube 17a of the fifteenth embodiment.
- the low-pressure refrigerant depressurized in the fixed throttle hole 17b formed in the branch passage 16 of the first connection block 23 is connected to the right side of the upper tank 18b of the second evaporator 18 through the connection pipe 160. Introduce into space 28.
- the arrangement of the cylindrical tube 17a inside the upper tank 18b of the second evaporator 18 is abolished, and the connecting pipe 160 is arranged in the valley 51 of the upper tanks 15b, 18b. Therefore, while suppressing the enlargement of the integrated unit 20, the effect of reducing the refrigerant passage resistance in the upper tank 18 b of the second evaporator (leeward evaporator) 18 can be exhibited.
- a fixed throttle hole 17b is provided in the branch passage 16 of the first connection block 23 instead of the capillary tube 17a, as in the second embodiment (FIGS. 6 to 8). It is.
- FIGS. 31 to 33 show a seventeenth embodiment, in which the formation position of a fixed throttle hole 17b such as an orifice in the sixteenth embodiment is changed.
- This fixed throttle hole 17b forms the throttle mechanism of the second evaporator 18 on the ejector suction side, and the position of the fixed throttle hole 17b in the example shown in FIG. This is set to the refrigerant inlet portion, specifically, the refrigerant inlet passage portion of the right space 28 of the upper tank 18b of the second evaporator 18.
- the position where the fixed throttle hole 17b is formed is set at a portion immediately after the outlet of the branch passage 16 of the first connection block 23. Further, the fixed throttle hole 17b may be formed in the middle of the connecting pipe 160. [0209] Thus, the fixed throttle hole 17b is formed in any part of the refrigerant passage where the partial force immediately after the outlet of the branch passage 16 of the first connection block 23 reaches the refrigerant inlet passage portion of the upper tank 18b of the second evaporator 18. Make it.
- the second connection block 24 is arranged at the middle position in the longitudinal direction of the upper tank 18b of the second evaporator (leeward side evaporator) 18 as in the first embodiment, and the upper tank 18b.
- the inner space of the left and right spaces 27 and 28 are divided into two spaces, and the outlet side of the ejector 14 (through the through holes 33a opened in the intermediate wall 33 and the communication holes 24c of the second connection block 24) ( (Downstream side) Force that connects the refrigerant passage to the right space 32 of the upper tank 15b that forms the refrigerant inlet of the first evaporator (windward evaporator) 15
- the outlet-side refrigerant passage of the ejector 14 And the refrigerant inlet of the first evaporator (windward evaporator) 15 are configured to communicate with each other without using the second connection block 24.
- FIG. 34 to 38 show an eighteenth embodiment.
- FIG. 34 is a schematic perspective view of the first and second evaporators 15 and 18 as a whole.
- FIG. 35 (a) shows the first and second evaporators 15.
- Fig. 35 (b) is a vertical cross-sectional view of the upper tanks 15b and 18b
- Fig. 36 is a cross-sectional view of the upper tanks 15b and 18b
- Fig. 37 is Fig. 35 (b).
- FIG. 38 is an explanatory view of a single auxiliary tank member for forming a communication space, which is an additional part according to the eighteenth embodiment.
- the upper tanks 15b, 18b of the first and second evaporators 15, 18 are formed in the range of the length L1 in Fig. 35 (a), and the right side of the length L1 (the ejector 14).
- the auxiliary tank member 52 for forming the communication space is disposed over the length L2 on the opposite side of the refrigerant inlet side.
- the auxiliary tank member 52 is also formed of an aluminum material, and is a component that is integrally brazed with the first and second evaporators 15 and 18.
- One end side of the auxiliary tank member 52 (the left end side in FIGS. 34 and 35 (a)) has the same cross-sectional shape as the upper tanks 15b and 18b, that is, the shapes having the double arcuate curved shapes 52a and 52b (FIG. 38). (see (c)).
- One end side of the auxiliary tank member 52 is integrally joined to the end portions of the upper tanks 15b and 18b.
- a communication space 52d formed in both the region on the 15b side and the region on the upper tank 18b side of the second evaporator 18 on the leeward side is formed.
- the other end side of the inner space (communication space 52d) of the auxiliary tank member 52 is sealed by a cap member 56.
- the cap member 56 is also made of an aluminum material, and the first and second evaporators 15
- the second connection block 24 is eliminated, and a ring-shaped first partition plate 53 is replaced by a second evaporator (leeward evaporator). It arrange
- a ring-shaped second partition plate 54 is disposed at the right end of the upper tank 18b (the end opposite to the refrigerant inlet side of the ejector 14).
- the first partition plate 53 is for cutting the internal space of the upper tank 18b into a left space 27 and a right space 28.
- the second partition plate 54 partitions the right space 28 and the communication space 52d by the auxiliary tank member 52 located further to the right end side.
- FIG. 37 is an enlarged cross-sectional view of the vicinity of the right end portion of the upper tank 18b (B portion of FIG. 35 (b)), and the communication space 52d is illustrated by a thin dot portion.
- the outlet side refrigerant passage of the diffuser portion 14d of the ejector 14 does not communicate with the internal spaces 27 and 28 of the upper tank 18b, and communicates only with the communication space 52d through the connection pipe 55.
- a partition plate is provided at the right end of the upper tank 15b of the first evaporator (windward evaporator) 15. Since it is not arranged, the region on the first evaporator side in the communication space 52d communicates directly with the right space 32 of the upper tank 15b.
- the refrigerant outlet side passage of the ejector 14 communicates with the right space 32 of the upper tank 15b that forms the refrigerant inlet of the first evaporator 15 via the communication space 52d of the connection pipe 55 and the auxiliary tank member 52. To do.
- the capillary tube 17a is disposed in the valley 51 of the upper tanks 15b, 18b, and is integrally brazed to the outer surfaces of the upper tanks 15b, 18b as in the fifteenth embodiment.
- the outlet portion of the capillary tube 17a is an upper tank that forms the refrigerant inlet portion of the second evaporator 18 at an intermediate portion between the first and second partition plates 54 and 53, as shown in FIG. 35 (b). It communicates with the right space 28 of 18b.
- the refrigerant from the diffuser portion 14d of the ejector 14 apparently passes through the connecting pipe 55 and is discharged to the upper tank 18b side of the second evaporator 18
- This discharge refrigerant is It does not flow into the upper tank 18b but flows into the right space 32 of the upper tank 15b that forms the refrigerant inlet of the first evaporator 15 through the communication space 52d of the auxiliary tank member 52.
- the auxiliary tank member 52 can be efficiently manufactured by pressing only one metal plate.
- 39 to 41 show the nineteenth embodiment, in which the portion 17a of the cylindrical tube 17a in the eighteenth embodiment is replaced with a connecting pipe 160, and the second evaporator (leeward evaporator) 18 is used as a throttling mechanism on the 18th side.
- 1 Corresponds to a fixed block 17b in the branch passage 16 of the connection block 23.
- Other points of the nineteenth embodiment are the same as those of the eighteenth embodiment.
- the fixed throttle hole 17b forms the throttle mechanism of the second evaporator 18 on the ejector suction side, and the position of the fixed throttle hole 17b is the same as that of the seventeenth embodiment.
- the partial force immediately after the branch passage 16 of the first connection block 23 is also applied to the upper tank of the second evaporator 18.
- these parts can be assembled in various ways such as screwing, caulking, welding, bonding, etc. This can be done using fixing means.
- screw fixing is exemplified as the fixing means for the ejector 14.
- Any fixing means other than screw fixing can be used as long as it is a fixing means that does not cause thermal deformation.
- fix the ejector 14 using fixing means such as force and adhesion.
- the present invention may be applied to a cycle.
- the throttle mechanism 17 is constituted by the fixed throttle hole 17b such as the capillary tube 17a or the orifice.
- the throttle mechanism 17 is controlled by the electric actuator with the valve opening (passage throttle). It may be configured with an electric control valve whose opening degree is adjustable.
- the throttle mechanism 17 may be composed of a combination of a fixed throttle and a solenoid valve such as a capillary tube 17a or a fixed throttle hole 17b! / ⁇ .
- the ejector 14 is a force ejector 14 that exemplifies a fixed ejector having a nozzle portion 14a having a constant passage area, and a variable nozzle portion that can adjust the passage area. Use a variable ejector that you have.
- variable nozzle portion for example, there is a mechanism for adjusting the passage area by inserting a needle into the passage of the variable nozzle portion and controlling the position of the dollar by an electric actuator. do it.
- the temperature type expansion valve 13 and the temperature sensing part 13a are configured separately from the ejector type freezing unit.
- the temperature type expansion valve 13 and the temperature sensing part 13a may be integrally assembled in the ejector type refrigeration cycle unit.
- the refrigerant inlet 25 is located between the liquid receiver 12a and the temperature type expansion valve 13 and the refrigerant outlet 26 is located between the passage portion where the temperature sensing part 13a is installed and the compressor 11. Become.
- FIG. 1 is a refrigerant circuit diagram of an ejector refrigeration cycle for a vehicle according to a first embodiment of the present invention.
- FIG. 2 is a perspective view showing a schematic configuration of an integral unit according to the first embodiment.
- FIG. 3 is a longitudinal sectional view of an evaporator tank of the integral tank unit of FIG.
- FIG. 4 is a cross-sectional view of the evaporator tank of the integrated tank unit of FIG.
- FIG. 5 is a refrigerant circuit diagram of an ejector refrigeration cycle of a comparative example.
- FIG. 6 is a perspective view showing a schematic configuration of an integral cup unit according to a second embodiment.
- FIG. 7 is a longitudinal sectional view of an evaporator tank of the integrated tank unit of FIG.
- FIG. 8 is a cross-sectional view of the evaporator tank of the integrated unit of FIG.
- FIG. 9 is a perspective view showing a schematic configuration of an integrated cage unit according to a third embodiment.
- 10 is a longitudinal sectional view of an evaporator tank of the integral tank unit of FIG.
- FIG. 11 is a cross-sectional view of the evaporator tank of the integrated unit of FIG.
- FIG. 12 is a perspective view showing a schematic configuration of an integrated gutter unit according to the fourth embodiment.
- FIG. 13 is a longitudinal sectional view of an evaporator tank of the integral tank unit of FIG.
- FIG. 14 is a side view of the evaporator tank as viewed from A in FIG.
- FIG. 15 is a perspective view showing a schematic configuration of the unitary unit according to the fifth embodiment, combined with a cross-sectional view of the external cassette unit.
- FIG. 16 is a perspective view showing a schematic configuration of the unitary unit according to the sixth embodiment, combined with a cross-sectional view of the external cassette unit.
- FIG. 17 A refrigerant circuit diagram of a vehicle ejector refrigeration cycle according to a seventh embodiment.
- FIG. 18 is a refrigerant circuit diagram of an ejector refrigeration cycle for a vehicle according to an eighth embodiment.
- FIG. 19 is a refrigerant circuit diagram of an ejector refrigeration cycle for a vehicle according to a ninth embodiment.
- FIG. 20 is a refrigerant circuit diagram of a vehicle ejector refrigeration cycle according to a tenth embodiment.
- 21] A refrigerant circuit diagram of a vehicle ejector refrigeration cycle according to an eleventh embodiment.
- FIG. 22 is a refrigerant circuit diagram of a vehicle ejector refrigeration cycle according to a twelfth embodiment. ⁇ 23] It is a schematic perspective view of an evaporator structure according to a thirteenth embodiment.
- FIG. 24 (a) is a schematic perspective view of a first example of an evaporator structure according to a fourteenth embodiment
- FIG. 24 (b) is a schematic front view of a second example of an evaporator structure according to a fourteenth embodiment.
- FIG. 25 A perspective view showing a schematic configuration of an integrated heel unit according to a fifteenth embodiment.
- FIG. 26 is a longitudinal sectional view of an evaporator tank of the integral tank unit of FIG. 25.
- FIG. 27 is a cross-sectional view of the evaporator tank of the integrated unit in FIG. 25.
- ⁇ 28 It is a perspective view showing a schematic configuration of an integrated heel unit according to a sixteenth embodiment.
- FIG. 29 is a longitudinal sectional view of an evaporator tank of the integral tank unit of FIG.
- FIG. 30 is a cross-sectional view of the evaporator tank of the unitary unit of FIG.
- FIG. 31 is a perspective view showing a schematic configuration of an integrated bowl unit according to a seventeenth embodiment.
- FIG. 32 is a longitudinal sectional view of an evaporator tank of the integral tank unit of FIG. 31.
- FIG. 33 is a transverse cross-sectional view of the evaporator tank of the integral tank unit of FIG. 31.
- FIG. 34 A perspective view showing a schematic configuration of an integrated cage unit according to an eighteenth embodiment.
- FIG. 35 (a) is a top view of the evaporator tank of the integrated unit of FIG. 34, and (b) is a longitudinal sectional view of the evaporator tank.
- FIG. 36 is a cross-sectional view of the evaporator tank of the integrated unit of FIG. 34.
- FIG. 37 is an enlarged cross-sectional view of a portion B in FIG. 35 (b).
- (a) is a perspective view of an auxiliary tank member according to an eighteenth embodiment, (b) is a side view, (c) is a front view, and (d) is a sectional view taken along the line CC in (c).
- FIG. 39 is a perspective view showing a schematic configuration of an integrated gutter unit according to a nineteenth embodiment.
- FIG. 40 is a vertical cross-sectional view of the evaporator tank of the integrated unit of FIG. 39.
- FIG. 41 is a cross-sectional view of the evaporator tank of the integral unit in FIG. 39.
- FIG. 42 is a perspective view showing a schematic configuration of an integrated gutter unit according to a twentieth embodiment.
- FIG. 43 is a longitudinal sectional view of an evaporator tank of the integral tank unit of FIG.
- FIG. 44 is a cross-sectional view of the evaporator tank of the integrated unit of FIG. 42.
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air-Conditioning For Vehicles (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06731040.9A EP1870648B1 (en) | 2005-04-05 | 2006-04-04 | Ejector type refrigerating cycle unit |
US11/659,620 US7707849B2 (en) | 2005-04-05 | 2006-04-04 | Unit for ejector type refrigeration cycle |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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JP2005-108800 | 2005-04-05 | ||
JP2005108800 | 2005-04-05 | ||
JP2005-219340 | 2005-07-28 | ||
JP2005219340 | 2005-07-28 | ||
JP2006-064370 | 2006-03-09 | ||
JP2006064370A JP4259531B2 (ja) | 2005-04-05 | 2006-03-09 | エジェクタ式冷凍サイクル用ユニット |
Publications (1)
Publication Number | Publication Date |
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WO2006109617A1 true WO2006109617A1 (ja) | 2006-10-19 |
Family
ID=37086895
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2006/307092 WO2006109617A1 (ja) | 2005-04-05 | 2006-04-04 | エジェクタ式冷凍サイクル用ユニット |
Country Status (6)
Country | Link |
---|---|
US (1) | US7707849B2 (ja) |
EP (1) | EP1870648B1 (ja) |
JP (1) | JP4259531B2 (ja) |
KR (1) | KR100879748B1 (ja) |
CN (1) | CN101737990B (ja) |
WO (1) | WO2006109617A1 (ja) |
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US7647789B2 (en) | 2006-01-19 | 2010-01-19 | Denso Corporation | Evaporator unit and ejector type refrigeration cycle |
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US7770412B2 (en) | 2000-01-20 | 2010-08-10 | Denso Corporation | Integrated unit for refrigerant cycle device and manufacturing method of the same |
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Also Published As
Publication number | Publication date |
---|---|
CN101737990B (zh) | 2013-04-24 |
EP1870648B1 (en) | 2018-11-21 |
US20080264097A1 (en) | 2008-10-30 |
KR100879748B1 (ko) | 2009-01-21 |
EP1870648A4 (en) | 2014-12-03 |
EP1870648A1 (en) | 2007-12-26 |
CN101737990A (zh) | 2010-06-16 |
JP4259531B2 (ja) | 2009-04-30 |
JP2007057222A (ja) | 2007-03-08 |
KR20070067084A (ko) | 2007-06-27 |
US7707849B2 (en) | 2010-05-04 |
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