US20100223949A1 - Evaporator with cool storage function - Google Patents

Evaporator with cool storage function Download PDF

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Publication number
US20100223949A1
US20100223949A1 US12/656,971 US65697110A US2010223949A1 US 20100223949 A1 US20100223949 A1 US 20100223949A1 US 65697110 A US65697110 A US 65697110A US 2010223949 A1 US2010223949 A1 US 2010223949A1
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United States
Prior art keywords
cool storage
storage material
refrigerant flow
material container
container
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Abandoned
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US12/656,971
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English (en)
Inventor
Naohisa Higashiyama
Hironaka Sasaki
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.)
Mahle Behr Thermal Systems Japan Ltd
Original Assignee
Showa Denko KK
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Filing date
Publication date
Priority claimed from JP2009052871A external-priority patent/JP5315094B2/ja
Priority claimed from JP2009113286A external-priority patent/JP5486837B2/ja
Application filed by Showa Denko KK filed Critical Showa Denko KK
Assigned to SHOWA DENKO K.K. reassignment SHOWA DENKO K.K. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HIGASHIYAMA, NAOHISA, SASAKI, HIRONAKA
Publication of US20100223949A1 publication Critical patent/US20100223949A1/en
Assigned to KEIHIN THERMAL TECHNOLOGY CORPORATION reassignment KEIHIN THERMAL TECHNOLOGY CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SHOWA DENKO K.K.
Assigned to KEIHIN THERMAL TECHNOLOGY CORPORATION reassignment KEIHIN THERMAL TECHNOLOGY CORPORATION CORRECTIVE ASSIGNMENT TO CORRECT THE RECEIVING PARTY'S ADDRESS PREVIOUSLY RECORDED AT REEL: 028982 FRAME: 0429. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: SHOWA DENKO K.K.
Assigned to KEIHIN THERMAL TECHNOLOGY CORPORATION reassignment KEIHIN THERMAL TECHNOLOGY CORPORATION CORRECTIVE ASSIGNMENT TO CORRECT THE INCORRECT APPL. NO. 13/064,689 PREVIOUSLY RECORDED AT REEL: 028982 FRAME: 0429. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: SHOWA DENKO K.K.
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
    • F25B39/02—Evaporators
    • F25B39/022—Evaporators with plate-like or laminated elements
    • 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
    • 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
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • 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
    • F25B2400/24—Storage receiver heat
    • 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
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D2020/0004—Particular heat storage apparatus
    • F28D2020/0008—Particular heat storage apparatus the heat storage material being enclosed in plate-like or laminated elements, e.g. in plates having internal compartments
    • 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
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D2020/0004—Particular heat storage apparatus
    • F28D2020/0013—Particular heat storage apparatus the heat storage material being enclosed in elements attached to or integral with heat exchange conduits
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • the present invention relates to an evaporator with a cool storage function for use in a car air conditioner for a vehicle in which an engine serving as a drive source for a compressor is temporarily stopped when the vehicle is stopped.
  • an ordinary car air conditioner has a problem in that, when an engine of an automobile in which the air conditioner is mounted is stopped, a compressor driven by the engine is stopped, and supply of refrigerant to an evaporator stops, whereby the cooling capacity of the air conditioner sharply drops.
  • imparting a cool storage function to the evaporator has been considered, to thereby enable cooling of a vehicle compartment by making use of cool stored in the evaporator, when the compressor stops as a result of stoppage of the engine.
  • the proposed evaporator includes a pair of refrigerant header sections disposed apart from each other, and a plurality of flat refrigerant flow tubes disposed between the two refrigerant header sections such that their width direction coincides with an air flow direction, and they are spaced from one another in the longitudinal direction of the refrigerant header sections. Opposite ends of the refrigerant flow tubes are connected to the two refrigerant header sections, respectively.
  • the evaporator further includes a plurality of hollow cool storage material containers disposed such that their width direction coincides with the air flow direction.
  • Each of the cool storage material containers is fixedly provided on one side of a corresponding refrigerant flow tube and contains a cool storage material therein.
  • the dimension of each cool storage material container with respect to the thickness direction is made uniform over the entirety of the cool storage material container.
  • a plurality of sets each composed of refrigerant flow tubes and a cool storage material container are disposed apart from each other, and a space between adjacent pairs each composed of refrigerant flow tubes and a cool storage material container serves as an air-passing clearance.
  • a fin is disposed in the air-passing clearance, and is joined to the refrigerant flow tube and the cool storage material container.
  • the evaporator having a cool storage function disclosed in the publication, when an increase in the amount of the cool storage material in the cool storage material container is desired in order to improve the cool storage performance, the lengths of the cool storage material containers and the refrigerant flow tubes must be increased, and the container height (dimension with respect to the thickness direction) of the cool storage material containers must be increased over the entirety thereof.
  • the container height of the cool storage material containers and the refrigerant flow tubes are increased, the size of the heat exchange core section of the evaporator increases, with a resultant increase in weight and deterioration in space saving performance.
  • the container height of the cool storage material containers is increased over the entirety thereof without changing the dimension of the heat exchange core section, the air passage area of each air-passing clearance decreases, and air passage resistance increases.
  • An object of the present invention is to solve the above problems and to provide an evaporator with a cool storage function of reduced size and weight which can suppress an increase in air passage resistance.
  • the present invention comprises the following modes.
  • An evaporator with a cool storage function comprising a plurality of flat refrigerant flow tube sections disposed such that their width direction coincides with an air flow direction and they are spaced from one another, and a plurality of flat cool storage material containers disposed such that their width direction coincides with the air flow direction, each of the cool storage material containers being in contact with one side surface of the corresponding refrigerant flow tube section and containing a cool storage material, wherein
  • an internal-volume-increasing portion is provided at an upstream or downstream portion of each cool storage material container with respect to the air flow direction, and has a container height greater than that of the remaining portion of the cool storage material container, the container height being a dimension in a thickness direction of the cool storage material container.
  • An evaporator with a cool storage function according to par. 1), wherein a plurality of sets each composed of a refrigerant flow tube section and a cool storage material container are disposed such that they are spaced from one another in a direction perpendicular to the width direction of the refrigerant flow tube sections; a space between adjacent sets each composed of a refrigerant flow tube section and a cool storage material container serves as an air-passing clearance; and a fin is disposed in the air-passing clearance, and is joined to the corresponding refrigerant flow tube section and the corresponding cool storage material container.
  • An evaporator with a cool storage function according to par. 1), wherein a plurality of refrigerant flow tube sections are juxtaposed in the air flow direction; a tube section height of at least the refrigerant flow tube section disposed on the downstream end, the tube section height being a dimension in the thickness direction thereof, is smaller than that of the remaining refrigerant flow tube section(s); and the internal-volume-increasing portion is provided at a portion of each cool storage material container, which portion is in contact with the refrigerant flow tube section having the smaller tube section height.
  • the internal-volume-increasing portion whose container height (dimension in the thickness direction of the cool storage material container) is greater than that of the remaining portion is provided on the upstream portion or downstream portion of the cool storage material container. Therefore, as compared with the case where the container height of the cool storage material container is uniform over the entirety thereof, the amount of the cool storage material charged into the cool storage material container can be increased without increasing the lengths of the cool storage material container and the refrigerant flow tube sections or increasing the container height of the cool storage material container over the entirety thereof. Accordingly, the size and weight of the evaporator can be reduced as compared with the case of a conventional evaporator with a cool storage function.
  • each cool storage material container and each fin project outward, with respect to the air flow direction, from the refrigerant flow tube sections, and the internal-volume-increasing portion is provided at a portion of each cool storage material container which portion projects outward, with respect to the air flow direction, from the refrigerant flow tube sections, a decrease in the area of the air-passing clearances stemming from provision of the internal-volume-increasing portions can be suppressed. Therefore, even when the dimension of the heat exchange core section is not changed, an increase in air passage resistance can be suppressed.
  • the internal-volume-increasing portion is provided at a portion of the cool storage material container which portion is in contact with the refrigerant flow tube section having a smaller tube section height, a decrease in the area of the air-passing clearances stemming from provision of the internal-volume-increasing portions can be suppressed. Therefore, even when the dimension of the heat exchange core section is not changed, an increase in air passage resistance can be suppressed.
  • each cool storage material container and each fin project outward, with respect to the air flow direction, from the refrigerant flow tube sections;
  • the internal-volume-increasing portion is provided at a portion of each cool storage material container which portion projects outward, with respect to the air flow direction, from the refrigerant flow tube sections; and the fins are joined to opposite side surfaces of the internal-volume-increasing portion of each cool storage material container.
  • the amount of the cool storage material charged into the cool storage material container can be increased without increasing the lengths of the cool storage material container and the refrigerant flow tube sections or increasing the container height of the cool storage material container over the entirety thereof. Accordingly, the size and weight of the evaporator can be reduced as compared with the case of a conventional evaporator with a cool storage function. In addition, a decrease in the area of the air-passing clearances stemming from provision of the internal-volume-increasing portions can be suppressed. Therefore, even when the dimension of the heat exchange core section is not changed, an increase in air passage resistance can be suppressed.
  • cool stored in the cool storage material within the internal-volume-increasing portion of each cool storage material container is transmitted to air passing through the corresponding air-passing clearances from the opposite side surfaces of the internal-volume-increasing portion via the fins fixed to the opposite side surfaces of the internal-volume-increasing portion.
  • cool releasing performance is improved.
  • the interiors of the cool storage material containers communicate with one another at the internal-volume-increasing portions thereof. Therefore, through formation of a cool-storage-material charging opening in the internal-volume-increasing portion of one cool storage material container and an air bleeding opening in the internal-volume-increasing portion of another cool storage material container, an operation of charging the cool storage material into the mutually connected cool storage material containers becomes easier.
  • the internal-volume-increasing portion containing a larger amount of the cool storage material is present in a region where the air flowing through the corresponding air-passing clearance has a decreased temperature. Therefore, the cool storage material can be cooled efficiently, whereby cool storage performance is improved.
  • a plurality of refrigerant flow tube sections are juxtaposed in the air flow direction; a tube section height of at least the refrigerant flow tube section disposed on the downstream end, the tube section height being a dimension in the thickness direction thereof, is smaller than that of the remaining refrigerant flow tube section(s); and the internal-volume-increasing portion is provided at a portion of each cool storage material container which portion is in contact with the refrigerant flow tube section having the smaller tube section height.
  • the amount of the cool storage material charged into the cool storage material container can be increased without increasing the lengths of the cool storage material container and the refrigerant flow tube sections or increasing the container height of the cool storage material container over the entirety thereof. Accordingly, the size and weight of the evaporator can be reduced as compared with the case of a conventional evaporator with a cool storage function. In addition, a decrease in the area of the air-passing clearances stemming from provision of the internal-volume-increasing portions can be suppressed. Therefore, even when the dimension of the heat exchange core section is not changed, an increase in air passage resistance can be suppressed.
  • the cool storage material can be cooled efficiently, whereby cool storage performance is improved.
  • FIG. 1 is a partially cut-away perspective view showing the overall structure of an evaporator with a cool storage function according to the present invention
  • FIG. 2 is a partially omitted enlarged sectional view taken along line A-A of FIG. 1 ;
  • FIG. 3 is an enlarged sectional view taken along line B-B of FIG. 2 ;
  • FIG. 4 is an enlarged sectional view taken along line C-C of FIG. 2 ;
  • FIG. 5 is a perspective view showing a plurality of cool storage material containers united together
  • FIG. 6 is an exploded perspective view showing a single cool storage material container
  • FIG. 7 is a graph showing a relation between cool releasing time and container height of the container body of each cool storage material container of the evaporator with a cool storage function shown in FIGS. 1 to 6 ;
  • FIG. 8 is a graph showing a relation between air passage resistance and container height of the container body of each cool storage material container of the evaporator with a cool storage function shown in FIGS. 1 to 6 ;
  • FIG. 9 is a graph showing a relation between cool storing time and container height of the container body of each cool storage material container of the evaporator with a cool storage function shown in FIGS. 1 to 6 ;
  • FIG. 10 is a graph showing a relation between air passage resistance and tube height of the refrigerant flow tubes of the evaporator with a cool storage function shown in FIGS. 1 to 6 ;
  • FIG. 11 is a graph showing a relation between air passage resistance and fin height of corrugated fins of the evaporator with a cool storage function shown in FIGS. 1 to 6 ;
  • FIG. 12 is a sectional view corresponding to FIG. 3 and showing another embodiment of the evaporator with a cool storage function according to the present invention.
  • the downstream side (a direction represented by arrow X in FIGS. 1 to 4 ) with respect to an air flow direction will be referred to as the “front,” and the opposite side as the “rear.”
  • the upper, lower, left-hand, and right-hand sides as viewed rearward from the front side; i.e., the upper, lower, left-hand, and right-hand sides of FIG. 1 will be referred to as “upper,” “lower,” “left, and “right,” respectively.
  • aluminum encompasses aluminum alloys in addition to pure aluminum.
  • FIG. 1 shows the overall configuration of an evaporator with a cool storage function according to the present invention
  • FIGS. 2 to 6 show the configurations of essential portions of the evaporator.
  • an evaporator with a cool storage function 1 includes a first header tank 2 and a second header tank 3 formed of aluminum and disposed apart from each other in the vertical direction such that they extend in the left-right direction; and a heat exchange core section 4 provided between the two header tanks 2 and 3 .
  • the first header tank 2 includes a refrigerant inlet header section 5 located on the front side (downstream side with respect to the air flow direction); and a refrigerant outlet header section 6 located on the rear side (upstream side with respect to the air flow direction) and united with the refrigerant inlet header section 5 .
  • a refrigerant inlet 7 is provided at the right end of the refrigerant inlet header section 5
  • a refrigerant outlet 8 is provided at right end of the refrigerant outlet header section 6 .
  • the second header tank 3 includes a first intermediate header section 9 located on the front side, and a second intermediate header section 11 located on the rear side and united with the first intermediate header section 9 .
  • the respective interiors of the first and second intermediate header sections 9 and 11 of the second header tank 3 are connected together via a communication member 12 which extends across and is joined to the right ends of the intermediate header sections 9 and 11 and which has a flow passage formed therein.
  • the heat exchange core section 4 includes a plurality of sets each composed of a plurality of (two in the present embodiment) vertically extending flat refrigerant flow tubes (refrigerant flow tube sections) 13 formed of aluminum extrudate, and a vertically extending flat cool storage material container 14 formed of aluminum.
  • the refrigerant flow tubes 13 are disposed such that their width direction coincides with the front-rear direction and they are spaced from each other in the front-rear direction.
  • the cool storage material container 14 is disposed such that its width direction coincides with the front-rear direction, and is brought into contact with selected side surfaces (left side surfaces in the present embodiment) of the front and rear refrigerant flow tubes 13 .
  • the cool storage material container 14 is brazed to the front and rear refrigerant flow tubes 13 .
  • the cool storage material container 14 contains a cool storage material (not shown) therein.
  • the plurality of sets 15 each composed of front and rear refrigerant flow tubes 13 and one cool storage material container 14 are disposed such that the sets are spaced from one another in the left-right direction (direction perpendicular to the width direction of the refrigerant flow tubes 13 ).
  • Upper-end portions of the front refrigerant flow tubes 13 are connected to the refrigerant inlet header section 5 , and lower end portions of the front refrigerant flow tubes 13 are connected to the first intermediate header section 9 . Further, upper end portions of the rear refrigerant flow tubes 13 are connected to the refrigerant outlet header section 6 , and lower end portions of the rear refrigerant flow tubes 13 are connected to the second intermediate header section 11 .
  • a space between adjacent sets 15 each composed of two refrigerant flow tubes 13 and one cool storage material container 14 serves an air-passing clearance 16 .
  • a corrugated fin 17 formed of aluminum is disposed in the air-passing clearance 16 , and is brazed to the corresponding refrigerant flow tubes 13 and the corresponding cool storage material container 14 .
  • corrugated fin 17 formed of aluminum is disposed on the outer sides of two sets 15 located at the left and right ends, respectively.
  • the right end corrugated fin 17 is brazed to the front and rear refrigerant flow tubes 13 located at the right end, and the left end corrugated fin 17 is brazed to the cool storage material container 14 located at the left end.
  • a side plate 18 formed of aluminum is disposed on the outer side of each of the corrugated fins 17 located at the left and right ends, respectively, and is brazed to the corresponding corrugated fin 17 .
  • each cool storage material container 14 includes a container body 21 and an internal-volume-increasing portion 22 .
  • the container body 21 is located rearward of the front edges of the refrigerant inlet header section 5 and the first intermediate header section 9 , and is brazed to the front and rear refrigerant flow tubes 13 of the corresponding set 15 .
  • the internal-volume-increasing portion 22 extends from the front edge of the container body 21 such that the volume-increasing portion 22 projects frontward from the front edges of the refrigerant inlet header section 5 and the first intermediate header section 9 .
  • the dimension of the internal-volume-increasing portion 22 as measured in the thickness direction (left-right direction) is greater than that of the container body 21 .
  • the container height of the internal-volume-increasing portion 22 is equal to the sum of a tube height (tube section height), which is the dimension of the refrigerant flow tubes 13 as measured in the thickness direction and the container height of the container body 21 of each cool storage material container 14 .
  • the internal-volume-increasing portion 22 is swelled rightward only in relation to the container body 21 , and the left side surface of the internal-volume-increasing portion 22 is flush with the left side surface of the container body 21 .
  • a communication hole 24 formed in a swelled end wall portion of each of the tank-forming portions 23 establishes communication between the interiors of the tank-forming portions 23 of the internal-volume-increasing portions 22 of adjacent cool storage material containers 14 .
  • the upper tank-forming portions 23 of the internal-volume-increasing portions 22 of all the cool storage material containers 14 form an upper communication tank 25
  • the lower tank-forming portions 23 of the internal-volume-increasing portions 22 of all the cool storage material containers 14 form a lower communication tank 25 .
  • the interiors of all the cool storage material containers 14 are connected together via the upper and lower communication tanks 25 .
  • a cool-storage-material charging opening is formed in one of the upper and lower communication tanks 25
  • an air-bleeding opening is formed in the other of the upper and lower communication tanks 25 .
  • a cool storage material is charged into all the cool storage material containers 14 via the cool-storage-material charging opening. After the cool storage material is charged into the cool storage material containers 14 , the cool-storage-material charging opening and the air-bleeding opening are closed by appropriately means.
  • the cool storage material to be charged into the cool storage material containers 14 include a water-based cool storage material and a paraffin-based cool storage material having an adjusted freezing point of about 3 to 10° C. Further, preferably, the amount of the cool storage material charged into the cool storage material containers 14 is determined so that the cool storage material fills all the cool storage material containers 14 up to their upper ends.
  • each cool storage material container 14 is composed of two generally rectangular, vertically elongated aluminum plates 26 and 27 brazed together along their peripheral edge portions. Both the aluminum plates 26 and 27 are formed from an aluminum brazing sheet having a brazing material layer on each of opposite sides thereof, and have the same external shape when they are viewed from the left and right sides, respectively.
  • the left-hand aluminum plate 26 which partially constitutes the cool storage material container 14 , includes a first swelled portion 28 for forming the container body 21 , a second swelled portion 29 for forming the internal-volume-increasing portion 22 , and third swelled portions 31 for forming the tank-forming portions 23 .
  • the first swelled portion 28 accounts for the greater part of the aluminum plate 26 , excluding a front portion thereof, and is swelled leftward.
  • the second swelled portion 29 which extends frontward from the first swelled portion 28 , is swelled leftward, and has the same swelling height as the first swelled portion 28 .
  • the third swelled portions 31 are provided at the upper and lower ends of the second swelled portion 29 , are swelled leftward, and have a swelling height greater than that of the second swelled portion 29 .
  • the above-mentioned communication holes 24 are formed on the swelled end walls of the third swelled portions 31 of the left and aluminum plate 26 of each cool storage material container 14 , excluding the cool storage material container 14 at the left end.
  • the right-hand aluminum plate 27 which partially constitutes the cool storage material container 14 , includes a flat portion 32 for forming the container body 21 , a first swelled portion 33 for forming the internal-volume-increasing portion 22 , and second swelled portions 34 for forming the tank-forming portions 23 .
  • the flat portion 32 accounts for the greater part of the aluminum plate 27 , excluding a front portion thereof.
  • the first swelled portion 33 which extends frontward from the flat portion 32 , is swelled rightward.
  • the second swelled portions 34 are provided at the upper and lower ends of the first swelled portion 33 , are swelled rightward, and have a swelling height greater than that of the first swelled portion 33 .
  • the above-mentioned communication holes 24 are formed on the swelled end walls of the second swelled portions 34 of the right-hand aluminum plate 27 of each cool storage material container 14 , excluding the cool storage material container 14 at the right end.
  • the two aluminum plates 26 and 27 are assembled and brazed together so that the openings of the swelled portions 29 and 31 face the openings of the swelled portions 33 and 34 , and the opening of the first swelled portion 28 is closed by the flat portion 32 .
  • the cool storage material container 14 is formed.
  • the tank formation portions 23 of two adjacent cool storage material containers 14 are brazed to each other such that the communication holes 24 of the third swelled portions 31 communicate with the communication holes 24 of the second swelled portions 34 .
  • each corrugated fin 17 projects frontward from the front refrigerant flow tubes 13 .
  • a portion of the corrugated fin 17 which portion projects frontward from the front refrigerant flow tubes 13 , is brazed to the left side surface of the internal-volume-increasing portion 22 of the cool storage material container 14 located on the right side of the corrugated fin 17 , and is brazed to the right side surface of the internal-volume-increasing portion 22 of the cool storage material container 14 located on the left side of the corrugated fin 17 .
  • a container height Hc is the dimension (as measured in the thickness direction (left-right direction)) of the container body 21 of the cool storage material container 14 in thermal contact with the refrigerant flow tubes 13 ; i.e., the dimension of the cool storage material container 14 , excluding the internal-volume-increasing portion 22 .
  • a tube height Ht which is the dimension of the refrigerant flow tubes 13 as measured in the thickness direction (left-right direction)
  • a fin height Hf which is the dimension of the corrugated fins 17 as measured in the direction of arrangement of the sets 15 each composed of the refrigerant flow tubes 13 and the cool storage material container 14 (left-right direction)
  • the container height Hc of the container body 21 is set to 1
  • the tube height Ht of the refrigerant flow tubes 13 is set to 0.25 to 2.0
  • the fin height Hf of the corrugated fins 17 is set to 1.0 to 5.5
  • a core length L of the heat exchange core section 4 (the distance between the outer edges of the corrugated fins 17 at the left and right ends; see FIG. 1 ) is 300 mm; a core height H (the vertical length of the corrugated fins 17 , excluding the corrugated fins 17 at the left and right ends; see FIG. 1 ) is 250 mm; a core width W 1 (the distance between the front edges of the front refrigerant flow tubes 13 and the rear edges of the rear refrigerant flow tubes 13 ; see FIG.
  • each cool storage material container 14 as measured in the front-rear direction is set to 50 mm; the container height Hc of the container body 21 of each cool storage material container 14 is set to 1.5 to 4 mm; the tube height Ht of each refrigerant flow tube 13 is set to 1 to 3 mm; and the fin height Hf of each corrugated fin 17 is set to 4 to 8 mm.
  • the container height Hc of the container body 21 When the container height Hc of the container body 21 is less than 1.5 mm, the amount of the cool storage material charged into all the cool storage material containers 14 becomes insufficient, and, when the compressor stops, the cool releasing time becomes short (see FIG. 7 ). When the container height Hc exceeds 4 mm, the area of the air-passing clearances 16 decreases, and the air passage resistance increases, whereby the cooling performance drops (see FIG. 8 ). In addition, when the container height Hc of the container body 21 exceeds 4 mm, the amount of the cool storage material charged into all the cool storage material containers 14 becomes excessive, and the cool storing time increases, whereby the performance of cooling down after start of cooling operation drops (see FIG. 9 ).
  • each refrigerant flow tube 13 when the tube height Ht of each refrigerant flow tube 13 is less than 1 mm, a flow resistance acting on the refrigerant within the refrigerant flow tubes 13 increases, whereby the cooling performance drops.
  • the height Ht of each refrigerant flow tube 13 exceeds 3 mm, the area of the air-passing clearances 16 decreases, and the air passage-resistance increases, whereby the cooling performance drops (see FIG. 10 ).
  • the fin height Hf of each corrugated fin 17 when the fin height Hf of each corrugated fin 17 is less than 4 mm, the air passage resistance increases, whereby the cooling performance drops (see FIG. 11 ).
  • the fin height Hf of each corrugated fin 17 exceeds 8 mm, the number of the refrigerant flow tubes 13 decreases, whereby the cooling performance drops.
  • the above-described evaporator 1 with a cool storage function constitutes a refrigeration cycle using a fluorocarbon refrigerant, in combination with a compressor driven by an engine of a vehicle, a condenser (refrigerant cooler) for cooling the refrigerant discharged from the compressor, and an expansion valve (pressure-reducing unit) for reducing the pressure of the refrigerant having passed through the condenser.
  • the refrigeration cycle is installed, as a car air conditioner, in a vehicle, such as an automobile, which temporarily stops the engine, which serves as a drive source of the compressor, when the vehicle is stopped.
  • two-phase refrigerant (a mixture of vapor refrigerant and liquid refrigerant) having been compressed by the compressor and having passed through the condenser and the expansion valve passes through the refrigerant inlet 7 , and enters the inlet header section 5 of the evaporator 1 .
  • the refrigerant then passes through all the front refrigerant flow tubes 13 , and enters the first intermediate header section 9 .
  • the refrigerant having entered the first intermediate header section 9 passes through the communication member 12 , and enters the second intermediate header section 11 .
  • the refrigerant passes through all the rear refrigerant flow tubes 13 , enters the outlet header section 6 , and flows out via the refrigerant outlet 8 .
  • the refrigerant performs heat exchange with air passing through the air-passing clearances 16 , and flows out of the refrigerant flow tubes 13 in a vapor phase.
  • each cool storage material container 14 is cooled by the refrigerant flowing through the refrigerant flow tubes 13 , and the cool storage material within the internal-volume-increasing portion 22 of each cool storage material container 14 is cooled by air having been cooled by the refrigerant while passing through the air-passing clearances 16 .
  • the cool storage material is frozen, whereby cool is stored therein.
  • each cool storage material container 14 When the compressor stops, the cool stored in the cool storage material within the container body 21 of each cool storage material container 14 is transferred from the left side surface of the container body 21 to air passing through the corresponding air-passing clearance 16 via the corrugated fin 17 brazed to the left side surface of the cool storage material container 14 , and is also transferred from the right side surface of the container body 21 to air passing through the corresponding air-passing clearance 16 via the refrigerant flow tubes 13 and the corrugated fin 17 brazed to the refrigerant flow tubes 13 .
  • each cool storage material container 14 is transmitted from the left and right side surfaces of the internal-volume-increasing portion 22 to the air passing through the corresponding air-passing clearances 16 via the corrugated fins 17 brazed to the left and right side surfaces of the internal-volume-increasing portion 22 . Accordingly, even when the temperature of wind having passed through the evaporator 1 increases, the wind is cooled, so that a sharp drop in the cooling capacity can be prevented.
  • FIG. 12 shows another embodiment of the evaporator with a cool storage function according to the present invention.
  • the tube height (dimension in the thickness direction) of the refrigerant flow tubes 40 disposed on the front side (at the front end) is smaller than that of the refrigerant flow tubes 13 disposed on the rear side.
  • a front portion of each cool storage material container 41 does not project frontward from the front ends of the front refrigerant flow tubes 40 , and an internal-volume-increasing portion 43 is provided at a portion of each cool storage material container 41 , which portion is brazed to the corresponding refrigerant flow tube 40 having a small tube height.
  • the container height (dimension in the thickness direction (left-right direction)) of an internal-volume-increasing portion 43 is greater than that of the remaining portion of the cool storage material container 41 ; i.e., that of a container body 42 located rearward of the rear edges of the front refrigerant flow tubes 40 .
  • the sum of the container height of the internal-volume-increasing portion 43 of the cool storage material container 41 and the tube height (dimension in the thickness direction) of the front refrigerant flow tube 40 is equal to the sum of the container height of the container body 42 of the cool storage material container 41 and the tube height (dimension in the thickness direction) of the rear refrigerant flow tube 13 .
  • each corrugated fin 17 does not project frontward from the front ends of the front refrigerant flow tubes 40 .
  • Each corrugated fin 17 is brazed to the right side surfaces of the refrigerant flow tubes 13 and 40 located on the left side of the corrugated fin 17 , and is also brazed to the left side surfaces of the container body 42 and the internal-volume-increasing portion 43 of the cool storage material container 41 located on the right side of the corrugated fin 17 .
  • each of the refrigerant flow tube sections of the evaporator with a cool storage function may be provided in a flat hollow body formed, by two aluminum plates brazed together along their peripheral edge portions, as in the case of a so-called laminate-type evaporator. That is, each of the refrigerant flow tube sections may be formed between the two aluminum plates which were swelled so as to constitute a flat hollow body.
  • inner fins may be provided inside the cool storage material container.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Air-Conditioning For Vehicles (AREA)
US12/656,971 2009-03-06 2010-02-22 Evaporator with cool storage function Abandoned US20100223949A1 (en)

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US20110154855A1 (en) * 2009-12-25 2011-06-30 Showa Denko K.K. Evaporator with cool storage function
US20120042687A1 (en) * 2010-08-23 2012-02-23 Showa Denko K.K. Evaporator with cool storage function
WO2012128611A1 (en) * 2011-03-18 2012-09-27 Autarkis B.V. Latent heat storage heat exchanger
US20140318176A1 (en) * 2008-12-26 2014-10-30 Keihin Thermal Technology Corporation Evaporator with cool storage function
US20150121945A1 (en) * 2013-11-01 2015-05-07 Keihin Thermal Technology Corporation Heat exchanger with thermal storage function
EP2705318A4 (en) * 2011-05-04 2015-05-20 Halla Visteon Climate Control COLD-STORING HEAT EXCHANGER
US20150198386A1 (en) * 2014-01-16 2015-07-16 Halla Visteon Climate Control Corp. Tube-fin thermal storage evaporator
US20150241080A1 (en) * 2014-02-21 2015-08-27 Keihin Thermal Technology Corporation Air-conditioning apparatus for vehicle
USD738996S1 (en) * 2013-12-06 2015-09-15 Keihin Thermal Technology Corporation Evaporator with cool storage function
US9242530B2 (en) * 2011-10-28 2016-01-26 Hanon Systems Heat exchanger with phase change material manifolds
US20160137019A1 (en) * 2013-06-20 2016-05-19 Valeo Systemes Thermiques Tube Having A Container Of Phase Change Material For A Heat Exchange Bundle, In Particular For An Evaporator Of An Air Conditioning System Of A Vehicle
CN106240306A (zh) * 2016-09-07 2016-12-21 芜湖德鑫汽车部件有限公司 汽车空调蒸发器储冷装置
CN106394180A (zh) * 2016-09-07 2017-02-15 芜湖德鑫汽车部件有限公司 汽车空调蒸发器储冷装置
WO2017212201A1 (fr) * 2016-06-10 2017-12-14 Hutchinson Procede d'echange et de conditionnement d'un echangeur thermique
WO2017212198A1 (fr) * 2016-06-10 2017-12-14 Hutchinson Echangeur stockeur d'energie thermique
US9989315B2 (en) 2012-08-07 2018-06-05 Denso Corporation Cold storage heat exchanger
US20190016190A1 (en) * 2015-05-30 2019-01-17 Air International (Us) Inc. Storage Evaporator Having Phase Change Material For Use In Vehicle Air Conditioning System
EP3480545A4 (en) * 2016-08-04 2019-07-03 Japan Climate Systems Corporation COLD STORAGE EVAPORATORS
CN110879015A (zh) * 2018-09-05 2020-03-13 广东美的白色家电技术创新中心有限公司 蓄能换热装置及空调设备
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US20140318176A1 (en) * 2008-12-26 2014-10-30 Keihin Thermal Technology Corporation Evaporator with cool storage function
US9297561B2 (en) * 2008-12-26 2016-03-29 Keihin Thermal Technology Corporation Evaporator with cool storage function
US20110154855A1 (en) * 2009-12-25 2011-06-30 Showa Denko K.K. Evaporator with cool storage function
US20120042687A1 (en) * 2010-08-23 2012-02-23 Showa Denko K.K. Evaporator with cool storage function
WO2012128611A1 (en) * 2011-03-18 2012-09-27 Autarkis B.V. Latent heat storage heat exchanger
US10220673B2 (en) 2011-05-04 2019-03-05 Hanon Systems Cold-storage heat exchanger
EP2705318A4 (en) * 2011-05-04 2015-05-20 Halla Visteon Climate Control COLD-STORING HEAT EXCHANGER
US9555687B2 (en) 2011-05-04 2017-01-31 Hanon Systems Cold-storage heat exchanger
US9242530B2 (en) * 2011-10-28 2016-01-26 Hanon Systems Heat exchanger with phase change material manifolds
US9989315B2 (en) 2012-08-07 2018-06-05 Denso Corporation Cold storage heat exchanger
US10144266B2 (en) * 2013-06-20 2018-12-04 Valeo Systems Thermiques Tube having a container of phase change material for a heat exchange bundle, in particular for an evaporator of an air conditioning system of a vehicle
US20160137019A1 (en) * 2013-06-20 2016-05-19 Valeo Systemes Thermiques Tube Having A Container Of Phase Change Material For A Heat Exchange Bundle, In Particular For An Evaporator Of An Air Conditioning System Of A Vehicle
US20150121945A1 (en) * 2013-11-01 2015-05-07 Keihin Thermal Technology Corporation Heat exchanger with thermal storage function
US9863652B2 (en) * 2013-11-01 2018-01-09 Keihin Thermal Technology Corporation Heat exchanger with thermal storage function
USD738996S1 (en) * 2013-12-06 2015-09-15 Keihin Thermal Technology Corporation Evaporator with cool storage function
US20150198386A1 (en) * 2014-01-16 2015-07-16 Halla Visteon Climate Control Corp. Tube-fin thermal storage evaporator
US20150241080A1 (en) * 2014-02-21 2015-08-27 Keihin Thermal Technology Corporation Air-conditioning apparatus for vehicle
US20190016190A1 (en) * 2015-05-30 2019-01-17 Air International (Us) Inc. Storage Evaporator Having Phase Change Material For Use In Vehicle Air Conditioning System
US11059345B2 (en) * 2015-05-30 2021-07-13 Air International (Us) Inc. Storage evaporator having phase change material for use in vehicle air conditioning system
US11073342B2 (en) * 2016-06-01 2021-07-27 Denso Corporation Regenerative heat exchanger
WO2017212201A1 (fr) * 2016-06-10 2017-12-14 Hutchinson Procede d'echange et de conditionnement d'un echangeur thermique
FR3052549A1 (fr) * 2016-06-10 2017-12-15 Hutchinson Echangeur stockeur d'energie thermique
WO2017212198A1 (fr) * 2016-06-10 2017-12-14 Hutchinson Echangeur stockeur d'energie thermique
US11067342B2 (en) 2016-06-10 2021-07-20 Hutchinson Method for heat exchange and conditioning of a heat exchanger
FR3052548A1 (fr) * 2016-06-10 2017-12-15 Hutchinson Procede d'echange et de conditionnement d'un echangeur thermique
US11326839B2 (en) 2016-06-10 2022-05-10 Hutchinson Thermal exchanger-accumulator
EP3480545A4 (en) * 2016-08-04 2019-07-03 Japan Climate Systems Corporation COLD STORAGE EVAPORATORS
CN106394180A (zh) * 2016-09-07 2017-02-15 芜湖德鑫汽车部件有限公司 汽车空调蒸发器储冷装置
CN106240306A (zh) * 2016-09-07 2016-12-21 芜湖德鑫汽车部件有限公司 汽车空调蒸发器储冷装置
CN110879015A (zh) * 2018-09-05 2020-03-13 广东美的白色家电技术创新中心有限公司 蓄能换热装置及空调设备

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