US20120291478A1 - Condenser for vehicle and air conditioning system for vehicle - Google Patents

Condenser for vehicle and air conditioning system for vehicle Download PDF

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Publication number
US20120291478A1
US20120291478A1 US13/316,262 US201113316262A US2012291478A1 US 20120291478 A1 US20120291478 A1 US 20120291478A1 US 201113316262 A US201113316262 A US 201113316262A US 2012291478 A1 US2012291478 A1 US 2012291478A1
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US
United States
Prior art keywords
refrigerant
condenser
vehicle
radiator
supplied
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/316,262
Other languages
English (en)
Inventor
Jae Yeon Kim
Soon-Jong Lee
Wan Je Cho
Man Hee Park
Yoo-Sung Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hyundai Motor Co
Kia Corp
Original Assignee
Hyundai Motor Co
Kia Motors Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020110048077A external-priority patent/KR101734281B1/ko
Priority claimed from KR1020110084194A external-priority patent/KR101274241B1/ko
Application filed by Hyundai Motor Co, Kia Motors Corp filed Critical Hyundai Motor Co
Assigned to HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION reassignment HYUNDAI MOTOR COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHO, WAN JE, KIM, JAE YEON, KIM, YOON-SUNG, LEE, SOON-JONG, PARK, MAN HEE
Publication of US20120291478A1 publication Critical patent/US20120291478A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • 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
    • B60H1/00321—Heat exchangers for air-conditioning devices
    • B60H1/00335—Heat exchangers for air-conditioning devices of the gas-air type
    • 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
    • B60H1/3204—Cooling devices using compression
    • B60H1/3227—Cooling devices using compression characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator
    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0084—Condensers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses

Definitions

  • the present invention relates to a condenser for a vehicle and an air conditioning system for a vehicle. More particularly, the present invention relates to a condenser for a vehicle that uses a coolant to condense a refrigerant and an air conditioning system for a vehicle that prevent heat deterioration of a compressor to improve overall cooling performance.
  • an air conditioning unit for a vehicle maintains suitable cabin temperature regardless of ambient temperature and realizes a comfortable indoor environment.
  • Such an air conditioning unit includes a compressor compressing a refrigerant, a condenser condensing and liquefying the refrigerant compressed by the compressor, an expansion valve quickly expanding the refrigerant condensed and liquefied by the condenser, and an evaporator evaporating the refrigerant expanded by the expansion valve such that cooling air is supplied to the cabin in which the air conditioning unit is installed by using evaporation latent heat.
  • the condenser cools the compressed gaseous refrigerant of a high temperature/pressure by using outside air flowing into the vehicle when running and condenses it into a liquid refrigerant of low a temperature.
  • Such a condenser is generally connected through a pipe to a receiver-drier which is provided for improving condensing efficiency through gas-liquid separation and removing moisture in the refrigerant.
  • a condenser for a vehicle is a fin-tube type that is cooled by outside air, and the overall size thereof needs to be increased so as to increase cooling performance such that there is a drawback that it is too large to fit in a narrow engine compartment.
  • a water-cooled condenser that uses a coolant as refrigerant is applied to the vehicle.
  • the water-cooled condenser compared with the air-cooled condenser, has a lower refrigerant condensing temperature by about 5-15° C., and accordingly the difference between the condensing temperature and the ambient temperature is small. Therefore, condensing efficiency may be deteriorated due to a small sub-cooling effect, and accordingly cooling efficiency may also be deteriorated.
  • the size of a radiator or capacity of a cooling fan may be increased so as to increase the condensing efficiency or cooling efficiency of the water-cooled condenser for the vehicle. Therefore, the cost and weight may increase and connections between the receiver-drier and the condenser may be complex.
  • the coolant that is cooled by outside air exchanges heat with the coolant of the condenser to increase the coolant temperature at the outlet of the condenser, and therefore there is a problem that power consumption is increased.
  • the present invention has been made in an effort to provide a condenser for a vehicle having advantages of reducing the number of components and simplifying the layout of a connecting pipe, reducing cost and weight, and reducing volume of a receiver drier to increase a radiating area such that the cooling efficiency and overall performance are improved.
  • the present invention has been made in an effort to provide a condenser for vehicle in which an accumulator is integrally formed, and only gaseous refrigerant is supplied to a compressor such that damage to the compressor is prevented and durability of the compressor is improved.
  • the present invention has been made in an effort to provide an air conditioning system for a vehicle of which heat exchange efficiency is improved through heat exchange using potential heat of a middle temperature/high pressure liquid refrigerant and a low temperature/low pressure liquefying mixed refrigerant, and therefore a sub-cool area and temperature are increased to improve overall cooling performance of the system of an environmentally-friendly vehicle in which an electrically driven compressor is applied.
  • the present invention has been made in an effort to provide an air conditioner for a vehicle in which, when a gas refrigerant is supplied to the electrically driven compressor and a sub-cool area is increased, the flow rate of the refrigerant is increased through an opening rate increment of the expansion valve, and superheat of the refrigerant is reduced below a predetermined value such that an increment of the interior temperature is prevented and heat deterioration of the electrically driven compressor 509 is prevented after the electrically driven compressor compresses the refrigerant.
  • a condenser for a vehicle that is disposed between the compressor and the expansion valve and circulates coolant that is supplied from a radiator to condense refrigerant through heat exchange with refrigerant that is supplied from a compressor in an air conditioning system including an expansion valve that expands liquid refrigerant, an evaporator that evaporates the expanded refrigerant through heat exchange with air, and a compressor that receives gaseous refrigerant from the evaporator to compress the gaseous refrigerant, may include a main radiating portion that is formed by laminating a plurality of plates, is connected to the radiator to circulate coolant, and circulates refrigerant that is supplied from the compressor to condense the refrigerant through heat exchange, a receiver drier portion that receives the condensed refrigerant through the main radiating portion, separates gas and liquid of the refrigerant, eliminates water, and is integrally formed at one side end of the main radiating portion to exhaust only liquid refrigerant, a supercooling radiator
  • the main radiating portion may guide the coolant and the refrigerant to flow in opposite directions such that the coolant and the refrigerant exchange heat efficiently.
  • the main radiating portion may have a first connection passage through which the condensed refrigerant flows in the receiver drier portion.
  • the supercooling radiator may have a second connection passage through which the refrigerant of which liquid and gas is separated and water is eliminated is supplied from the receiver drier portion.
  • the supercooling radiator may have a refrigerant passage through which refrigerant that flows through the second connection passage from the receiver drier portion flows and a gas refrigerant passage through which low temperature/pressure that is supplied from the evaporator flows, wherein the condensed refrigerant of the refrigerant passage and the gas refrigerant of the gas refrigerant passage exchange heat from each other to be supercooled.
  • the supercooling radiator may have a third connection passage through which the low temperature and low pressure gas refrigerant that is supplied from the evaporator is supplied to the accumulator portion.
  • the heat transfer prevention portion may be formed between the main radiating portion and the supercooling radiator to prevent heat exchange of the refrigerant passing the main radiating portion with the supercooled refrigerant flowing from the supercooling radiator.
  • the heat transfer prevention portion may have a plurality of brazing communication holes that are formed in a length direction on one side surface between the main radiating portion and the supercooling radiator, wherein N2 gas is charged through the brazing communication holes.
  • the main radiating portion, the receiver drier portion, the supercooling radiator, and the accumulator portion respectively may have upper and lower covers to be disposed between the upper cover and the lower cover.
  • the upper cover may have a coolant inlet and a coolant outlet through which coolant flows in or is exhausted corresponding to one side and the other side of the main radiating portion, wherein a refrigerant inlet through which refrigerant is supplied from the compressor is formed at a side of the coolant outlet, and a gas refrigerant outlet that is connected to the compressor is formed at one side corresponding to the accumulator portion.
  • the lower cover may have a refrigerant outlet that is formed at one end portion in an opposite side of the receiver drier portion corresponding to the refrigerant inlet to be connected to the expansion valve and a gas refrigerant inlet that is formed at one side of the supercooling radiator near the receiver drier portion, wherein the low temperature and low pressure gas refrigerant is supplied from the evaporator through the gas refrigerant inlet.
  • the receiver drier portion may have a first mounting space that is formed therein and an insertion hole is formed in a lower cover corresponding to the first mounting space.
  • a drier may be inserted into the first mounting space through the insertion hole.
  • a fixing cap may be mounted in the insertion hole to prevent separation of the drier that is inserted into the first mounting space and to prevent the escape of the refrigerant in the receiver drier portion.
  • the accumulator portion may have a second mounting space in which an accumulator is disposed.
  • the radiator may be a lower temperature type to be connected to a reservoir tank, and a cooling fan is disposed at a rear side thereof.
  • the condenser may include a heat exchanger of which a plurality of plates are laminated.
  • An air conditioning system for a vehicle that includes an expansion valve that expands fluid refrigerant, an evaporator that evaporates the expanded refrigerant through heat exchange with air, and an electrically driven compressor that receives the gaseous refrigerant from the evaporator to compress the gaseous refrigerant, wherein they are connected through a refrigerant line, may include a water cooler condenser that circulates a coolant that is supplied from a radiator through a cooling line and condenses the refrigerant through heat exchange with the refrigerant that is supplied from the electrically driven compressor, and a heat exchanger that is disposed on the refrigerant line between the water cooler condenser and the evaporator, wherein a liquid state refrigerant of a middle temperature and a high pressure passing the water cooler condenser exchanges heat with a low temperature/pressure refrigerant passing the evaporator in the heat exchanger.
  • the water cooler condenser may include a radiation portion that circulates the refrigerant that is supplied from the electrically driven compressor and condenses the refrigerant through heat exchange with the coolant, and a receiver drier portion that receives the condensed refrigerant through the radiating portion and is integrally formed with the radiating portion to be connected to the radiation portion such that gas and liquid of the refrigerant are separated and water thereof is eliminated.
  • the heat exchanger may have a double pipe structure, wherein a middle temperature and high pressure liquid state refrigerant and a low temperature/pressure refrigerant that is being gasified flow in opposite directions to exchange heat with each other.
  • An accumulator may be disposed on the refrigerant line between the electrically driven compressor and the heat exchanger so as to supply the electrically driven compressor with only gasified refrigerant among the mixed refrigerant of fluid and gas passing the heat exchanger.
  • a cooling that may be disposed at a rear side of the radiator to blow air, wherein the radiator is connected to the reservoir tank through a coolant line and coolant is circulated through the radiator by a water pump that is disposed on the coolant line.
  • the condenser for a vehicle may be a laminated plate type in which a receiver drier and an accumulator are integrally formed and uses a coolant to condense a refrigerant, supercools the condensed refrigerant through heat exchange with a gas refrigerant of low temperature/pressure that is supplied from the evaporator, can eliminate a separate device for supercooling the condensed refrigerant, simplifies components and connection pipes to save cost and weight, and increases a radiating area by reducing the volume of a receiver drier such that cooling efficiency and performance of a vehicle are improved.
  • the refrigerant that is condensed in the main radiating portion may be supplied to the supercooling radiator to be supercooled by heat exchange with a low temperature/pressure gas refrigerant such that a separate device or pipe for supercooling the condensed refrigerant is not necessary and more cost is saved.
  • the receiver drier portion may be integrally formed therein to reduce the volume of the condenser and therefore condensing efficiency and cooling efficiency are improved, and overall cooling performance of the vehicle air conditioning system is improved without the increment of the radiating area and the size increment.
  • the accumulator portion may be integrally formed therein and only gas refrigerant is supplied to the compressor such that damage to the compressor caused by liquid refrigerant is prevented and the durability of the compressor is improved.
  • heat exchange efficiency is improved through heat exchange using potential heat of a middle temperature/high pressure liquid refrigerant and a low temperature/low pressure liquefying mixed refrigerant, and therefore a sub-cool area and temperature are increased to improve overall cooling performance of the system of an environmentally-friendly vehicle to which the electrically driven compressor is applied.
  • the flow rate of the refrigerant may be increased through an opening rate increment of the expansion valve, and superheat of the refrigerant is reduced below a predetermined value such that an increment of the interior temperature is prevented and heat deterioration of the electrically driven compressor 509 is prevented after the electrically driven compressor compresses the refrigerant.
  • Efficiency of the evaporator may be improved through the flow rate increment of the refrigerant, and when the superheat is reduced by applying the accumulator, the liquid refrigerant that is not gasified to an overheated gas is supplied to the compressor, damage to the electrically driven compressor is prevented, and durability of the electrically driven compressor and overall durability of the air conditioning system are improved.
  • FIG. 1 is a block diagram of an exemplary vehicle air conditioning system to which a condenser for a vehicle is applied according to the present invention.
  • FIG. 2 is a perspective view of an exemplary condenser for a vehicle according to the present invention.
  • FIG. 3 is a cross-sectional view along line A-A of FIG. 2 .
  • FIG. 4 is a cross-sectional view along line B-B of FIG. 2 .
  • FIG. 5 is a block diagram of an exemplary air conditioning system for a vehicle according to the present invention.
  • FIG. 6 is a graph comparing conventional art with a refrigeration cycle of an exemplary air conditioning system for a vehicle according to the present invention.
  • FIG. 1 is a block diagram of a vehicle air conditioning system to which a condenser for a vehicle is applied according to an exemplary embodiment of the present invention
  • FIG. 2 is a perspective view of a condenser for a vehicle according to an exemplary embodiment of the present invention
  • FIG. 3 is a cross-sectional view along line A-A of FIG. 2
  • FIG. 4 is a cross-sectional view along line B-B of FIG. 2 .
  • a condenser 100 for a vehicle is applied to an air conditioning system that includes an expansion valve 101 that expands a fluid refrigerant, an evaporator 103 that evaporates the expanded refrigerant through heat exchange with air, and a compressor 105 the compresses the gaseous coolant from the evaporator 103 .
  • the condenser 100 is disposed between the compressor 105 and the expansion valve 101 , circulates coolant that is supplied from a radiator 107 , and condenses the refrigerant through heat exchange with the refrigerant that is supplied from the compressor 105 .
  • the radiator 107 is a low temperature type to be connected to a reservoir tank 108 and a cooling fan 109 is disposed at a rear side thereof.
  • the condenser 100 for a vehicle is a laminated plate type in which a receiver drier and an accumulator are integrally formed, and uses a coolant to condense a refrigerant, supercools the condensed refrigerant through heat exchange with a low temperature/pressure gas refrigerant that is supplied from the evaporator 103 , can eliminate a separate device for supercooling the condensed refrigerant, simplifies components and connection pipes to save cost and weight, and increases a radiating area by reducing volume of a receiver drier such that cooling efficiency and performance of a vehicle are improved.
  • an accumulator is integrally formed therein, and only gaseous refrigerant is supplied to a compressor such that damage to the compressor is prevented and durability of the compressor is improved.
  • the condenser 100 for a vehicle includes a main radiating portion 110 , a receiver drier portion 130 , a supercooling radiator 140 , and an accumulator portion 150 , and these will be described as follows.
  • the main radiating portion 110 includes upper and lower covers 111 and 113 , and plurality of plates 115 are laminated between the upper cover 111 and the lower cover 113 .
  • the main radiating portion 110 is connected to the radiator 107 to a circulate coolant, circulate a refrigerant that is supplied from the compressor 105 , and condense the refrigerant through heat exchange.
  • the coolant and the refrigerant flow in opposite directions in the main radiating portion 110 to effectively exchange heat.
  • the coolant and the refrigerant are not mixed to respectively flow through a refrigerant passage 117 and a coolant passage 119 that are alternately disposed between the plates 115 and do not communicate with each other in the main radiating portion 110 , and as shown in FIG. 3 and FIG. 4 , the coolant and the refrigerant flow in opposite directions from each other to exchange heat with each other.
  • the upper cover 111 has a coolant inlet 121 and a coolant outlet 123 that are formed at one side and the other side corresponding to the main radiating portion 110 , wherein the coolant flows in through the inlet from the radiator 107 or is exhausted out through the outlet.
  • a refrigerant inlet 125 is formed at a side of the coolant outlet 123 , high temperature and high pressure coolant flows in through the inlet 125 , and a gas refrigerant outlet 151 that is connected to the compressor 105 is formed at one side corresponding to the accumulator portion 150 .
  • the refrigerant inlet 125 is formed at one side of the upper cover 111 and the coolant outlet 123 is formed in an opposite direction of the coolant inlet 121 such that the coolant flows in an opposite direction to that of the refrigerant.
  • the receiver drier portion 130 receives condensed refrigerant through the main radiating portion 110 , and is integrally formed with one end of the main radiating portion 110 to be connected to the main radiating portion 110 so as to separate gas and liquid of the refrigerant and eliminate water.
  • the receiver driver portion and the main radiating portion may be monolithically formed.
  • a first connection passage 127 is formed in a lower side of the main radiating portion 110 such that the refrigerant that is condensed through heat exchange with the coolant flows in the receiver drier portion 130 through the passage 127 .
  • the receiver drier portion 130 reduces the volume through a receiver drier that has the same shape as the condenser 100 to be able to eliminate a separate pipe, compared to a conventional cylindrical receiver drier.
  • a first mounting space 131 is formed in the receiver drier portion 130 and an insertion hole 133 is formed on the lower cover 113 corresponding to the first mounting space 131 in the present exemplary embodiment.
  • a drier 135 is inserted into the first mounting space 131 through the insertion hole 133 , and the drier 135 eliminates water in the refrigerant that is supplied from the main radiating portion 110 .
  • a filter is integrally formed in the drier 135 to filter foreign materials included in the refrigerant of the receiver drier portion 130 .
  • the receiver drier portion 130 eliminates water in the refrigerant through the drier 135 and filters foreign materials through the filter to prevent the foreign material from being supplied to the expansion valve 101 .
  • the expansion valve 101 is not plugged by foreign materials of the refrigerant.
  • a fixing cap 137 is disposed in the insertion hole 133 to prevent separation of the drier 135 that is inserted into the first mounting space 131 and to prevent leakage of the refrigerant of the receiver drier portion 130 .
  • the supercooling radiator 140 is integrally formed with a lower portion of the main radiating portion 110 between the main radiating portion 110 and the receiver drier portion 130 .
  • the supercooling radiator and the main radiating portion may be monolithically formed.
  • the supercooling radiator 140 circulates low temperature/pressure gas refrigerant that is supplied from the evaporator 103 and supercools the refrigerant that is supplied from the receiver drier portion 130 through heat exchange with the low temperature/pressure gas refrigerant.
  • the supercooling radiator 140 has a refrigerant passage through which refrigerant that flows in the second connection passage 141 from the receiver drier portion 130 flows and a gas refrigerant passage 117 through which low temperature/pressure that is supplied from the evaporator 103 flows, wherein the condensed refrigerant of the refrigerant passage 117 and the gas refrigerant of gas refrigerant passage 143 exchange heat with each other.
  • the supercooling radiator 140 has the plate 115 that is laminated to be alternately disposed, and the condensed refrigerant passing the receiver drier portion 130 and the low temperature and low pressure gas refrigerant flows without mixing to heat exchange with each other through the refrigerant passage 117 and the gas refrigerant passage 143 that do not communicate with each other.
  • the lower cover 113 has a refrigerant outlet 129 to be connected to the expansion valve 101 , wherein the outlet 129 is formed at one end portion of an opposite side of the receiver drier portion 130 corresponding to the refrigerant inlet 125 .
  • the lower cover 113 has a gas refrigerant inlet 147 that is formed at one side of the supper cooling radiator 140 near the receiver drier portion 130 , wherein the low temperature/pressure gas refrigerant is supplied from the evaporator 103 .
  • the accumulator portion 150 is integrally formed with the main radiating portion 110 and the other end of the supercooling radiator 140 to be connected to the supercooling radiator 140 , and receives the low temperature/pressure refrigerant passing the supercooling radiator 140 such that only the gas refrigerant is supplied to the compressor through the gas refrigerant outlet 151 .
  • the portions of the accumulator portion, main radiating portion, and supercooling radiator may be monolithically formed.
  • the accumulator portion 150 has a second mounting space 155 for an accumulator 153 , and the accumulator 153 supplies only gas refrigerant to the compressor 105 through the gas refrigerant outlet 151 .
  • the accumulator portion 150 is integrally formed with the main radiating portion 110 of an opposite side of the receiver drier portion 130 and the other portion of the supercooling radiator 140 , wherein the gas refrigerant is supplied to the compressor 105 through the accumulator 153 to prevent the fluid refrigerant from being supplied to the compressor 105 .
  • the accumulator portion 150 is integrally formed with the other side of the main radiating portion 110 and the supercooling radiator 140 , and refrigerant or coolant is not supplied to a remaining portion except the supercooling radiator 140 and the third connection passage 145 in a height direction of the condenser 100 .
  • portions of the accumulator portion, the main radiating portion and the supercooling radiator may be monolithically formed.
  • a heat transfer prevention portion 160 is formed between the main radiating portion 110 and the supercooling radiator 140 to prevent heat transfer between the refrigerant passing the main radiating portion 110 and the supercooled refrigerant passing the supercooling radiator 140 .
  • the heat transfer prevention portion 160 is formed by supplying N2 gas through a plurality of brazing communication holes 161 that are formed during lamination of the plates 115 between the main radiating portion 110 and the supercooling radiator 140 .
  • the brazing holes 161 are closed after supplying the N2 gas for forming the heat transfer prevention portion 150 .
  • the condenser 100 is a heat-exchanger type in which plurality of plates 115 are laminated.
  • the coolant cooled through the radiator 107 is supplied to the main radiating portion 110 through the coolant inlet 121 .
  • the inflow coolant circulates along the coolant passage 119 that is formed between the plates 115 in the main radiating portion 110 and is exhausted to the radiator 107 again through the coolant outlet 123 .
  • the refrigerant flows from the compressor 105 into the main radiating portion 110 through the refrigerant inlet 125 , and flows through the refrigerant line 117 alternately formed with the coolant line 119 .
  • the condensed refrigerant circulates in the receiver drier portion 130 . At this time, gas-liquid separation is performed and the moisture in the refrigerant is removed by the drier 135 . After that, the condensed refrigerant is supplied to the second heat-radiating portion 140 through the second connecting line 141 .
  • the refrigerant supplied to the supercooling radiating portion 140 circulates through the refrigerant line 117 in the supercooling radiating portion 140 .
  • low temperature/pressure gas refrigerant that is supplied from the evaporator 103 is supplied to the supercooling radiator 140 near the receiver drier portion 130 Through the gas refrigerant inlet 147 that is formed on the lower cover 113 .
  • the gas refrigerant that is supplied to the supercooling radiator 140 flows to the accumulator portion 150 through the gas refrigerant passage 143 and exchanges heat with the refrigerant flowing in the refrigerant passage 117 .
  • the gas refrigerant supercools the refrigerant that is supplied from the receiver drier portion 130 to the supercooling radiator 140 through heat exchange with the refrigerant passing the main radiating portion 140 and the receiver drier portion 130 .
  • the refrigerant that is supplied to the supercooling radiator 140 exchanges heat with the gas refrigerant to be supercooled and is exhausted through the refrigerant outlet 129 to be supplied to the expansion valve 101 .
  • the gas refrigerant that is supplied to the gas refrigerant inlet 147 exchanges heat within the supercooling radiator 140 to be supplied to the accumulator portion 150 through the third connection passage 145 .
  • the gas refrigerant that is supplied to the accumulator portion 150 is exhausted through the gas refrigerant outlet 151 in a condition that the gas is separated from the remaining fluid refrigerant thereof to be supplied to the compressor 105 that is connected to the gas refrigerant outlet 151 .
  • receiver drier portion 130 and accumulator portion 150 are integrally formed with one end portion of the main and supercooling radiator 110 and 140 , additional connection pipes for connecting the receiver-drier portion 130 to the first and second heat-radiating portions 110 and 120 can be eliminated.
  • the receiver-drier of the receiver-drier portion 130 has the same shape as the condenser 100 , dead volume can be minimized.
  • gas refrigerant is supplied to the compressor 105 through the accumulator portion 150 to prevent damage and faults of the compressor 105 and to improve the durability thereof.
  • the heat transfer prevention portion 160 prevents the heat exchange of the refrigerant in the main radiating portion 110 and the supercooling radiator 140 to improve overall condensing efficiency and cooling efficiency of the condenser 100 .
  • the main radiating portion 110 , the receiver drier portion 130 , the supercooling radiator 140 , and the accumulator portion 150 are formed between the upper and lower covers 111 and 113 by laminating the plurality of plates 115 , but it is not limited thereto, and only the laminated structure of the plurality of plates 115 can form the main radiating portion 110 , the supercooling radiator 140 , the receiver drier portion 130 , and the accumulator portion 150 without the upper/lower covers 111 and 113 .
  • a condenser 100 for a vehicle is a laminated plate type in which the receiver drier and the accumulator are integrally formed, and uses a coolant to condense the refrigerant and supercools the condensed refrigerant through heat exchange with the low temperature/pressure gas refrigerant that is supplied from the evaporator 103 to simplify to layout of connecting pipes, to reduce components thereof, and to decrease cost and weight.
  • the refrigerant that is condensed in the main radiating portion 110 is supplied to the supercooling radiator 140 to be supercooled by heat exchange with the low temperature/pressure gas refrigerant such that a separate device or pipe for supercooling the condensed refrigerant is not necessary and further cost is saved.
  • receiver drier portion 140 is integrally formed therein to reduce volume of the condenser 100 and therefore condensing efficiency and cooling efficiency are improved, and overall cooling performance of the vehicle air conditioning system is improved without the increment of the radiating area and the size increment.
  • the accumulator portion 150 is integrally formed therein and only gas refrigerant is supplied to the compressor such that damage to the compressor caused by liquid refrigerant is prevented and the durability of the compressor is improved.
  • FIG. 5 is a block diagram of an air conditioning system for a vehicle according to an exemplary embodiment of the present invention.
  • heat exchange efficiency is increased through heat exchange using potential heat of a middle temperature/high pressure liquid refrigerant and a low temperature/low pressure liquid/gas mixed refrigerant to increase a sub-cool temperature and area in an environmentally-friendly vehicle in which an electrically driven compressor 505 is applied such that the overall cooling performance is improved in an air conditioning system 500 for a vehicle according to an exemplary embodiment of the present invention.
  • an air conditioning system 500 for a vehicle is disposed in a vehicle and includes an expansion valve 501 that expands fluid refrigerant, an evaporator 503 that evaporates the expanded refrigerant through the expansion valve 501 and minimizes the degree of overheat, and an electrically driven compressor 505 that receives the gaseous refrigerant from the evaporator 503 and compresses the gaseous refrigerant, wherein these are connected with each other through a refrigerant line (hereinafter, “R.L”).
  • R.L refrigerant line
  • the air conditioning system 500 for a vehicle further includes a water cooler condenser 510 and a heat exchanger 520 , and these will be described in more detail as follows.
  • the water cooler condenser 510 circulates coolant that is supplied from the radiator 507 through a cooling line (hereinafter, “C.L”) to condense the refrigerant through heat exchange with refrigerant that is supplied from the electrically driven compressor 505 .
  • C.L a cooling line
  • the radiator 507 is a low-temperature type to be connected to a reservoir tank 507 through the cooling line C.L, and circulates coolant through operation of a water pump 506 that is disposed in the cooling line C.L to cool the coolant through heat exchange with the outside air.
  • a cooling fan 509 is disposed at a rear side of the radiator 507 to blow air.
  • the water cooler condenser 510 is disposed between the electrically driven compressor 505 and the expansion valve 501 to circulate coolant that is supplied from the radiator 507 and condenses the refrigerant through heat exchange with the refrigerant that is supplied from the electrically driven compressor 505 .
  • the water cooler condenser 510 includes a radiating portion 511 and a receiver drier portion 513 .
  • the radiating portion 511 circulates the refrigerant that is supplied from the electrically driven compressor 505 and condenses the refrigerant through heat exchange with the coolant.
  • the radiating portion is a fin-tube type, but may be made of a plate type in which a plurality of plates are laminated.
  • the receiver drier portion 513 is integrally formed with the radiating portion 511 to be connected to the radiating portion 511 , receives the condensed refrigerant of the radiating portion 511 , separates gas and liquid thereof, and eliminates moisture.
  • the water cooler condenser 510 that is described above condenses the refrigerant that is supplied from the electrically driven compressor 505 through the heat exchange with the cooled coolant that is supplied from the radiator 507 through the radiating portion 511 .
  • the water cooler condenser 510 makes the condensed refrigerant that exchanges heat through the radiating portion 511 pass the receiver drier portion 513 , separates liquid and gas of the refrigerant, and eliminates moisture.
  • the heat exchanger 520 is disposed in the refrigerant line (R.L) between the water cooler condenser 510 and the evaporator 503 and makes a middle temperature/high pressure liquid state refrigerant passing the water cooler condenser 510 exchange heat with the low temperature/low pressure liquefying refrigerant passing the evaporator 503 .
  • the heat exchanger 520 is a double-pipe type, wherein the middle temperature/high pressure liquid state refrigerant and the low temperature/low pressure refrigerant flow in opposite directions to exchange heat.
  • the heat exchanger 520 makes the refrigerant passing the water cooler condenser 510 exchange heat with the refrigerant passing the evaporator 503 , and therefore heat exchange efficiency is increased.
  • the evaporator 503 evaporates the expanded refrigerant through heat exchange with air and maintains a uniform degree of superheat of the refrigerant to maximize the performance thereof in a condition of minimizing the degree of superheat of the refrigerant through the heat exchanger 520 of a double-pipe type.
  • the middle temperature/high pressure refrigerant passing the water cooler condenser 510 increases the sub-cool temperature and area compared with a conventional art, and when the sub-cool area is increased, the flow rate of the refrigerant is increased by adjusting the opening rate of the expansion valve 501 to be able to reduce superheat to less than a predetermined value.
  • an accumulator 530 is disposed between the electrically driven compressor 505 and the heat exchanger 520 in the refrigerant line (R.L) to supply the electrically driven compressor 505 with only gaseous refrigerant of the liquid/gas refrigerant passing the heat exchanger 520 .
  • the accumulator 530 stores fluid refrigerant of the gas/liquid mixed refrigerant and evaporates the fluid refrigerant to supply the gas refrigerant to the electrically driven compressor 505 such that the efficiency and durability of the electrically driven compressor 505 are improved.
  • a refrigeration cycle of an air conditioning system 500 of a vehicle according to an exemplary embodiment of the present invention is described as follows, referring to FIG. 6 .
  • FIG. 6 is a graph comparing a conventional art with a refrigeration cycle of an air conditioning system for a vehicle according to an exemplary embodiment of the present invention.
  • the refrigeration cycle shows a relation of enthalpy according to pressure.
  • ⁇ T and ⁇ T 1 denote sub-cool
  • T is an outlet temperature of the compressor
  • ⁇ T 2 , ⁇ T 3 , and ⁇ T 4 shows superheat
  • ⁇ h and ⁇ h′ show an enthalpy of the increased evaporator.
  • a sub-cool in an air conditioning system 500 for a vehicle according to an exemplary embodiment of the present invention is increased ( ⁇ T 1 > ⁇ T) compared to a conventional art ( ⁇ T).
  • the water cooler condenser 510 condenses the inflow refrigerant to a middle temperature/high pressure liquid refrigerant by cooling the inflow refrigerant through heat exchange with the coolant, and the middle temperature and high pressure liquid refrigerant further exchanges heat with the low temperature/low pressure liquefying refrigerant that is exhausted from the evaporator 503 through the heat exchanger 520 , and therefore heat exchange efficiency is increased and sub-cool temperature and area are increased compared to a conventional art.
  • enthalpy ( ⁇ h') of the evaporator 503 is increased ( ⁇ h′> ⁇ h) compared to evaporator enthalpy ( ⁇ h) of Conventional Art 1 and Conventional Art 2 , wherein this signifies that the liquid refrigerant to gaseous refrigerant ratio is increased by increasing the flow rate of the refrigerant according to an opening rate increment of the expansion valve 501 and the cooling performance is thereby improved.
  • the flow rate of the refrigerant is increased by increasing the opening rate of the expansion valve 501 such that the superheat ⁇ T 4 of the present exemplary embodiment is decreased compared to the superheat ⁇ T 2 of a Conventional Art 1 and the superheat ⁇ T 3 of a Conventional Art 2 .
  • the discharge temperature T 1 of the compressor 505 of the present exemplary embodiment is remarkably decreased compared to the compressor discharge temperature T 2 of the Conventional Art 1 and a compressor discharge temperature T 3 of the Conventional Art 2 , wherein the temperature is decreased (T 1 >T 2 >T 3 ).
  • heat exchange efficiency is improved through heat exchange using potential heat of a middle temperature/high pressure liquid refrigerant and a low temperature/low pressure liquefying mixed refrigerant, and therefore the sub-cool area and temperature are increased to improve overall cooling performance of the system of an environmentally-friendly vehicle to which the electrically driven compressor 505 is applied.
  • the flow rate of the refrigerant is increased through an opening rate increment of the expansion valve 501 , and superheat of the refrigerant is reduced below a predetermined value such that an increment of interior temperature is prevented and heat deterioration of the electrically driven compressor 509 is prevented after the electrically driven compressor 505 compresses the refrigerant.
  • efficiency of the evaporator 503 is improved through the flow rate increment of the refrigerant, and when superheat is reduced by applying the accumulator 530 , liquid refrigerant that is not gasified to an overheat as being supplied to the compressor 505 is prevented, damage to the electrically driven compressor 505 is prevented, and durability of the electrically driven compressor 505 and overall durability of the air conditioning system 500 are improved.
US13/316,262 2011-05-20 2011-12-09 Condenser for vehicle and air conditioning system for vehicle Abandoned US20120291478A1 (en)

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US10648701B2 (en) 2018-02-06 2020-05-12 Thermo Fisher Scientific (Asheville) Llc Refrigeration systems and methods using water-cooled condenser and additional water cooling
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US9851154B2 (en) * 2010-12-03 2017-12-26 Hyundai Motor Company Condenser for vehicle
US10753686B2 (en) 2010-12-03 2020-08-25 Hyundai Motor Company Condenser for vehicle
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JP6022156B2 (ja) 2016-11-09
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CN102788452B (zh) 2016-08-10
JP2012240670A (ja) 2012-12-10

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