WO2018047387A1 - Stockage à froid de refroidissement de tuyau multicouche - Google Patents

Stockage à froid de refroidissement de tuyau multicouche Download PDF

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Publication number
WO2018047387A1
WO2018047387A1 PCT/JP2017/011315 JP2017011315W WO2018047387A1 WO 2018047387 A1 WO2018047387 A1 WO 2018047387A1 JP 2017011315 W JP2017011315 W JP 2017011315W WO 2018047387 A1 WO2018047387 A1 WO 2018047387A1
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WO
WIPO (PCT)
Prior art keywords
heat exchange
brine solution
storage space
tube
plate
Prior art date
Application number
PCT/JP2017/011315
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English (en)
Japanese (ja)
Inventor
邦夫 大澤
Original Assignee
株式会社中温
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 JP2017030383A external-priority patent/JP6300970B2/ja
Application filed by 株式会社中温 filed Critical 株式会社中温
Priority to EP17848334.3A priority Critical patent/EP3511660A4/fr
Priority to KR1020187037699A priority patent/KR102272197B1/ko
Priority to US16/331,481 priority patent/US10852048B2/en
Priority to CN201780039813.3A priority patent/CN109416211B/zh
Publication of WO2018047387A1 publication Critical patent/WO2018047387A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D9/00—Devices not associated with refrigerating machinery and not covered by groups F25D1/00 - F25D7/00; Combinations of devices covered by two or more of the groups F25D1/00 - F25D7/00
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically

Definitions

  • the present invention relates to a refrigerator that can store an object to be cooled at a temperature lower than 0 ° C. without being frozen.
  • Patent Document 1 discloses a method of immersing and storing fresh food in storage water at -2 ° C to 0 ° C.
  • Patent Document 2 discloses a method for preserving fresh food by cooling with ultra-low temperature water maintained in an unfrozen state at 0 ° C. or lower.
  • JP 60-49740 A JP-A-8-116869
  • the inventor invented the cool box according to the present invention as a means for easily solving this problem.
  • the object of the present invention is to provide a cool box that can be easily stored without freezing the object to be cooled below 0 ° C.
  • the cool box according to the present invention is a cool box including a housing having a storage space for an object to be cooled inside, and a heat exchange pipe provided in the storage space, wherein the heat exchange pipe is: An outer tube having a thermal conductivity with an outer surface facing the storage space, and an inner tube provided inside the outer tube, and a multiple tube, between the outer tube and the inner tube A first brine solution that does not freeze at 0 ° C. is accommodated, and a refrigerant or a second brine solution that does not freeze at 0 ° C. is accommodated in the inner tube.
  • the inner tube is selected from cold resistant rubber, plastics, foamed resins, ceramics, and glass, and materials coated with copper, titanium, stainless steel, aluminum, and aluminum alloy. It is preferably a multilayer structure formed of a material or having an air layer inside.
  • the cold storage according to the present invention may further include at least one middle tube between the outer tube and the inner tube.
  • the cool box according to the present invention further includes a thermometer that measures the temperature of the first brine solution, and a control unit that controls the temperature of the second brine solution or the refrigerant based on the temperature. It is preferable.
  • the material, thickness, and heat transfer area of the inner tube are set so that the first brine solution is not completely frozen.
  • the cool box according to the present invention further includes a plurality of plate-like fins provided in the storage space, and the heat exchange pipe passes through the plate-like fins.
  • the cool box according to the present invention further includes air blowing means for blowing air in the storage space between the plate fins.
  • the cool box according to the present invention further includes a plate facing the inner surface of the housing, and the heat exchange tube and the plate fin are provided between the inner surface and the plate.
  • a slit is formed in the plate.
  • the cool box according to the present invention includes a housing having a storage space for an object to be cooled inside, a first heat exchange pipe provided in the storage space and containing a third brine solution, and the first A cold storage room comprising: a brine tank that contains the third brine solution supplied to the heat exchange pipe; and a second heat exchange pipe provided in the brine tank, wherein the second heat
  • the exchange tube is a multiple tube comprising an outer tube having an outer surface facing the third brine solution and having heat conductivity, and an inner tube provided inside the outer tube, and the outer tube and the A first brine solution that does not freeze at 0 ° C. is accommodated between the inner tube and a refrigerant or a second brine solution that does not freeze at 0 ° C. is accommodated inside the inner tube.
  • the cold storage according to the present invention further comprises a plurality of plate-like fins provided in the storage space, It is preferable that the first heat exchange tube penetrates the plate fin.
  • the cool box according to the present invention further includes air blowing means for blowing air in the storage space between the plate fins.
  • the present invention it is possible to provide a refrigerator that can easily store an object to be cooled at less than 0 ° C. without being frozen.
  • FIG. 2 is a cross-sectional view (vertical cross-sectional view) taken along line AA of FIG. In FIG. 2, the caster 7 is not shown.
  • FIG. 2 is a cross-sectional view (cross-sectional view) taken along line BB in FIG. (A) is the elements on larger scale of the edge part of a heat exchange pipe, (b) is CC sectional drawing of a heat exchange pipe.
  • A) is the elements on larger scale of the edge part of a heat exchange pipe
  • (b) is CC sectional drawing of a heat exchange pipe.
  • It is a longitudinal cross-sectional view of the cool box which concerns on the modification of embodiment of this invention.
  • It is a longitudinal cross-sectional view of the cool box which concerns on other embodiment of this invention.
  • FIG. 7 is a DD sectional view (transverse sectional view) of FIG. 6. It is a longitudinal cross-sectional view which shows the modification of the cool box of FIG.
  • FIG. 9 is a cross-sectional view (transverse cross-sectional view) taken along line EE in FIG. 8. It is sectional drawing which shows the modification of a heat exchange pipe. It is a longitudinal cross-sectional view of the cool box which concerns on the other modification of embodiment of this invention. It is a perspective view which shows a part of cold storage of FIG. It is sectional drawing of a 2nd heat exchange pipe. It is a longitudinal cross-sectional view of the cool box which concerns on the further another modification of embodiment of this invention. It is a perspective view which shows a part of cold storage of FIG.
  • FIG. 1 shows the external appearance of the cool box 1 according to an embodiment of the present invention
  • FIGS. 2 and 3 show the internal structure of the cool box 1.
  • the cool box 1 includes at least a housing 2 having a storage space S for storing the object to be cooled and a heat exchange tube 3 provided in the storage space S.
  • casing 2 is not specifically limited, In this embodiment, it is a rectangular parallelepiped, and the inner side of the wall which makes the external shape of the housing
  • the storage space S may be provided with multistage shelves in order to increase the storage capacity, and the size of the storage space S with respect to the housing 2 is not particularly limited.
  • the object to be stored in the storage space S is kept at a temperature lower than 0 ° C. and stored without freezing, and the quality can be maintained for a long time, for example, fresh vegetables, seafood, livestock, etc. Examples include food, organs and organs for transplantation, and blood.
  • the cool box 1 is provided with a refrigerator 6 for supplying a refrigerant to the heat exchange pipe 3 on the housing 2.
  • the outer wall of the housing 2 includes a front wall 2a and a back wall 2b facing each other, a top wall 2c and a bottom wall 2d facing each other, and a right side wall 2e and a left side wall 2f facing each other.
  • These walls 2a to 2f are preferably formed of a heat-insulating material.
  • a heat-shielding aluminum coating foamed resin for example, a foamed resin such as foamed polystyrene, a fiber reinforced plastic (FRP), and the inside It is made of a heat insulating material such as a vacuum insulating wall.
  • Four casters 7 are attached to the bottom wall 2d, and the cool box 1 can be self-propelled.
  • the front wall 2a is a door for opening the storage space S, and is attached to the left side wall 2f so as to be openable and closable by known means, although not shown.
  • a handle 8 for opening and closing is provided on the outer surface of the front wall 2a.
  • a plurality of heat exchange tubes 3 are provided in a row along the inner surfaces of the right side wall 2e and the left side wall 2f.
  • the number of heat exchange tubes 3 is not particularly limited, but is appropriately determined in consideration of the size of the storage space S, the efficiency of heat exchange, and the like.
  • a brine solution supply pipe 4 and a refrigerant supply pipe 5 are connected to both ends of each heat exchange pipe 3.
  • the position where the heat exchange tube 3 is provided is not particularly limited as long as it is within the storage space S.
  • the heat exchange tube 3 may be provided along the inner surface of the back wall 2b or the top wall 2c.
  • FIG. 4A is a partially enlarged view of the end portion of the heat exchange tube 3, and FIG. 4B is a cross-sectional view of the heat exchange tube 3.
  • FIG. The heat exchange tube 3 is a multiple tube including an outer tube 3a and an inner tube 3b.
  • the outer tube 3a has an outer surface facing the storage space S and is formed of a material having thermal conductivity.
  • the inner tube 3b is smaller in diameter than the outer tube 3a and is provided inside the outer tube 3a.
  • the first brine solution L1 is accommodated in a region T1 between the outer tube 3a and the inner tube 3b.
  • the brine solution is an antifreeze solution having a freezing point of less than 0 ° C.
  • coolant L2 is accommodated in the area
  • the 2nd brine solution may be accommodated instead of the refrigerant
  • both ends of the outer tube 3a are connected to a brine solution supply tube 4 via a connecting member 3c.
  • the brine solution supply pipe 4 is attached to a circulation pump (not shown).
  • the brine solution L1 supplied from the circulation pump to the one end of the outer tube 3a through the brine solution supply tube 4 is discharged from the other end of the outer tube 3a through the space between the outer tube 3a and the inner tube 3b.
  • the feed pipe 4 is returned to the circulation pump.
  • the structure of the connection member 3c will not be specifically limited if it is a structure which can be poured so that the brine solution L1 may not leak between the outer tube
  • both ends of the inner pipe 3 b are connected to the refrigerant supply pipe 5.
  • the refrigerant supply pipe 5 is covered with a heat insulating material, and is connected to the refrigerator 6 shown in FIGS. 1 and 2.
  • the refrigerant L2 supplied from the refrigerator 6 through the refrigerant supply pipe 5 to one end of the inner pipe 3b is discharged from the other end of the inner pipe 3b through the inside of the inner pipe 3b, and is refrigerated through the refrigerant supply pipe 5. Return to machine 6. While the refrigerant L2 flows through the inner pipe 3b, heat exchange with the brine solution L1 is performed, and the brine solution L1 is cooled to 0 ° C. or lower.
  • the heat transfer coefficient of the inner tube 3b is not particularly limited, in the present embodiment, the inner tube 3b is formed of a material having a high heat transfer coefficient, and is formed of a material such as copper, titanium, stainless steel, aluminum, or an aluminum alloy. be able to.
  • the inner tube 3b may have a single layer structure or a multilayer structure.
  • the brine solution L1 accommodated between the outer tube 3a and the inner tube 3b is an aqueous solution that does not freeze at 0 ° C. but freezes at a predetermined temperature below 0 ° C.
  • the freezing temperature of the brine solution L1 may be equal to or lower than the set cool temperature of the storage object, that is, the set temperature of the storage space S.
  • the brine solution L1 is an aqueous solution that freezes at a temperature of less than 0 ° C. to ⁇ 5 ° C., and for example, an aqueous solution in which an organic solvent such as a salt, organic acid salt, saccharide, or alcohol is dissolved can be used.
  • the freezing temperature of the brine solution L1 is not limited to this.
  • the solute of the brine solution L1 is not particularly limited as long as it lowers the freezing point of water, but is preferably one that does not adversely affect the human body.
  • salt, alcohol, sucrose, etc. can be used.
  • the freezing temperature of the brine solution L1 can be set to a desired temperature by adjusting the solute concentration.
  • the salts used for the solute are not particularly limited as long as they are salts that are harmless to the human body, such as sodium chloride, calcium chloride, phosphate, sulfite, and the like.
  • the salt concentration of the brine solution L1 is not particularly limited as long as the freezing temperature of the brine solution L1 is equal to or lower than the set temperature of the storage space S.
  • the salt concentration when the brine solution L1 is ethanol is used. Is 2.3 wt% (freezing point ⁇ 0.1 ° C.) to 12.9 wt% (freezing point ⁇ 5.0 ° C.).
  • the refrigerant L2 accommodated in the inner pipe 3b is not particularly limited as long as it can cool the brine solution L1 to the set temperature of the storage space S or less. can do.
  • the installation position of the refrigerator 6 that supplies the refrigerant L2 is not particularly limited.
  • the refrigerator 6 may be attached to the outer surface of the back wall 2b, the right side wall 2e, or the left side wall 2f of the housing 2.
  • the second brine solution is not particularly limited as long as the brine solution L1 can be cooled below the set temperature of the storage space S. They may be the same or different.
  • the cool box 1 is provided with a thermometer (not shown) that measures the temperature of the first brine solution.
  • the installation position of the thermometer is not particularly limited.
  • thermometer can transmit the measured temperature of the brine solution L1 to the controller by wired or wireless communication (wireless communication in FIG. 2) from the main body, and the controller refrigerates based on the temperature.
  • the operating state of the machine 6 is controlled to control the temperature of the refrigerant L2 supplied to the inner pipe 3b.
  • the temperature in the storage space S may be measured with a thermometer, and the controller may control the operating state of the refrigerator 6 based on the temperature.
  • the set cold storage temperature of the storage object is ⁇ 1.0 ° C.
  • the freezing temperature of the brine solution L1 is less than ⁇ 1.0 ° C.
  • the temperature of the refrigerant L2 is not particularly limited as long as it is lower than ⁇ 1.0 ° C.
  • the refrigerator 6 is operated and the refrigerant is supplied to the refrigerant coil inside the inner pipe 3b.
  • heat exchange is performed between the refrigerant
  • the controller of the refrigerator 6 stops the supply of the refrigerant L2 from the refrigerator 6 Let Thereby, cooling of the brine solution L1 is stopped.
  • the outer tube 3a is formed of a material having a high heat transfer coefficient, heat exchange is quickly performed between the brine solution L1 and the air in the storage space S, and the temperature in the storage space S is equal to that of the brine solution L1. Nearly equal to temperature. As a result, the temperature in the storage space S becomes ⁇ 1.0 ° C.
  • the controller of the refrigerator 6 operates the refrigerator 6 and restarts the supply of the refrigerant L2. Thereafter, when the temperature of the brine solution L1 reaches ⁇ 1.0 ° C., the controller of the refrigerator 6 stops the refrigerator 6. Thereafter, the refrigerator 6 repeats the operation cycle of the refrigerator 6 based on the temperature of the brine solution L1.
  • the inside of the storage space S is cooled by the brine solution L1 cooled to a desired temperature of less than 0 ° C.
  • the brine solution L1 has less temperature unevenness than the air in the storage space S with temperature unevenness depending on the position, the temperature of the brine solution L1 is accurately adjusted to an arbitrary temperature not lower than the freezing temperature and lower than 0 ° C. Can do. Therefore, the object to be cooled can be easily stored without being frozen at less than 0 ° C.
  • the temperature of the refrigerant L2 is set to about ⁇ 1.0 ° C., which is the set cool temperature of the storage object, but the temperature of the refrigerant L2 may be set lower (for example, ⁇ 10 ° C).
  • the inner tube 3b is formed of a material capable of adjusting heat transfer so that the brine solution L1 does not freeze.
  • materials for example, cold resistant rubber, plastics, foamed resins, ceramics, glass, and the like, and materials obtained by coating them with copper, titanium, stainless steel, aluminum, aluminum alloy, or the like can be used.
  • the inner pipe 3b may be covered with a material having high heat transfer property, and the heat transfer area of the inner pipe 3b may be adjusted to be small. Further, in order to reduce the heat transfer property of the inner tube 3b, the inner tube 3b may have a multilayer structure having an air layer inside like a pair of glass. Thus, by setting (controlling) the material, thickness, and heat transfer area of the inner tube 3b, the heat transfer speed of the inner tube 3b is adjusted, the cold storage capacity of the refrigerant L2 is increased, and the brine solution L1 Can be prevented from freezing completely.
  • heat exchange with the air in the storage space S can be performed via the surface of the heat exchange tube 3. Therefore, for example, compared to a configuration in which heat exchange is performed via the wall of the storage space S, the area for heat exchange can be increased, and thus the air in the storage space S can be efficiently cooled.
  • the cool box 1 has a structure in which the front wall 2a of the housing 2 can be opened and closed.
  • the present invention is not limited to this structure as long as the housing has at least a housing having a storage space for the object to be cooled.
  • the upper surface wall 2c may be open / closed or detachable.
  • the heat exchange tubes 3 are arranged so that the axial direction is vertical, but the present invention is not limited to this.
  • the heat exchange tubes 3 may be arranged so that the axial direction is horizontal.
  • each heat exchange pipe 3 was connected in parallel, you may connect in series like the cool box 1 'shown in FIG. In FIG. 5, the heat exchange tubes 3 are connected to each other by a semicircular arc-shaped curved portion 3 d and extend in the lateral direction of the cool box 1 ′ while meandering as a whole.
  • FIGS. 6 and 7 show the internal structure of a cold box 1a according to another embodiment of the present invention.
  • the basic structure of the cool box 1a shown in FIGS. 6 and 7 is the same as that of the cool box 1 shown in FIGS. 2 and 3, and here, the same reference numerals are given to the corresponding structures. Detailed description is omitted.
  • the cool box 1a of the present embodiment has a configuration in which the cool box 1 shown in FIGS. 2 and 3 is further provided with a plurality of plate-like fins 9.
  • the plate-like fins 9 have a thin plate shape extending in the horizontal direction of the cool box 1a, and a plurality of plate-like fins 9 are spaced apart from each other on the right side wall 2e and the left side wall 2f with their main surfaces parallel to each other. It is attached to become.
  • the plate-like fins 9 are preferably formed of a material having high thermal conductivity, and examples of such materials include copper, copper alloy, aluminum, aluminum alloy, titanium, titanium alloy, and stainless steel.
  • the heat exchange tube 3 extends in the horizontal direction of the cool box 1 a and vertically penetrates the main surfaces of the plurality of plate-like fins 9.
  • the cool box 1a may further include a blower (blower means, not shown) that blows the air in the storage space S between the plurality of plate-like fins 9.
  • a blower for example, a wing fan such as a small fan or a pressure ventilation fan, a sirocco fan, a turbo fan, a limit load fan, or the like can be used.
  • heat exchange with the air in the storage space S can be performed through the surface of the plate fin 9 in addition to the surface of the heat exchange tube 3. Furthermore, by reducing the distance between the plate-like fins 9 and increasing the number of the plate-like fins 9, the area for heat exchange with the air in the storage space S can be easily increased. Therefore, the air in the storage space S can be cooled more efficiently by the plate-like fins 9.
  • the air in the storage space S is blown between the plate-like fins 9 by a blower so that the cooled air near the surfaces of the heat exchange tubes 3 and the plate-like fins 9 is efficiently circulated in the storage space S. Can be made. Thereby, the cooling effect in the storage space S can be further enhanced.
  • FIG.8 and FIG.9 shows the internal structure of the cool box 1a 'which concerns on the modification of the cool box 1a.
  • the cool box 1a ′ further includes a plate 10 that faces the inner surface of the casing 2, and the plate-like fins 9 It is provided between the inner surface and the plate 10.
  • two plates 10 are provided so as to face the right side wall 2e and the left side wall 2f, respectively, between the right side wall 2e and the one plate 10, and between the left side wall 2f and the other plate.
  • the heat exchange tube 3 and the plate-like fins 9 are provided between them.
  • the plate 10 is a flat plate having a rectangular shape in plan view.
  • the material of the board 10 is not particularly limited, and can be selected according to the use of the cool box 1a ′ and the size of the storage space S.
  • the plate 10 may be formed of a plastic having a heat insulating effect, or may be formed of stainless steel, copper, copper alloy, aluminum, aluminum alloy, titanium or the like having a heat transfer effect.
  • the plate 10 serves as a partition, and the heat exchange tube 3 and the plate-like fins 9 are separated from the storage space S.
  • the temperature around the plate fin 9 is lower than the temperature on the center side of the storage space S.
  • the cool box 1 a ′ may further include a blower that blows air between the plate-like fins 9.
  • a blower that blows air between the plate-like fins 9.
  • the above-described cold storage provided with the plate-like fins 9 and the plate 10 is suitable for a refrigerated showcase in which outside air can easily enter the storage space and a cold storage vehicle having a large storage space.
  • the outer shape of the casing of the cool box is a rectangular parallelepiped, but is not limited thereto, and may be a cube, a tetrahedron, a cylinder, or the like.
  • the heat exchange tube 3 is a double tube composed of an outer tube 3a and an inner tube 3b.
  • at least one middle tube is further provided between the outer tube and the inner tube.
  • an intermediate tube 3e is provided between the outer tube 3a and the inner tube 3b, such as a heat exchange tube 3 'shown in FIG.
  • a brine solution may be accommodated in the region T3 between the inner tube 3b and the middle tube 3e, or a refrigerant may be accommodated.
  • the second brine solution when allowed to flow through the inner tube 3b, the second brine solution may be frozen or may not be frozen. However, if the second brine solution is frozen, the inner tube 3b may be damaged, and the heat exchange efficiency with the brine solution L1 is reduced. Therefore, it is preferable not to freeze the second brine solution. Therefore, it is preferable to use a liquid that does not freeze as the second brine solution even at a temperature (for example, ⁇ 20 ° C.) significantly lower than the set temperature in the storage space S. If the second brine solution is not frozen, the livestock cooling effect after the supply of power to the cold storage is reduced is reduced. However, when the cold storage is used as a refrigerated showcase, the refrigerated showcase is always powered. Because it is used, there is no problem.
  • a temperature for example, ⁇ 20 ° C.
  • FIG. 11 shows the internal structure of a cold box 1b according to another modification of the present invention.
  • the appearance of the cool box 1b is the same as that shown in FIG.
  • members having the same functions as those in the above embodiment are given the same reference numerals, and detailed descriptions thereof are omitted.
  • the cool box 1b is provided in the housing 2 having the storage space S for the object to be cooled inside, the first heat exchange pipe 31 provided in the storage space S, the brine tank A1, and the brine tank A1. And a second heat exchange pipe 32.
  • the first heat exchange pipe 31 is provided on the bottom wall W1 in the storage space S and is covered with the floor board F1.
  • the bottom wall W1 and the floor board F1 face each other, and a bottom space S1 is formed between the bottom wall W1 and the floor board F1.
  • the objects to be stored are placed on the floor board F1.
  • a gap is formed in at least a part between the end of the floor plate F1 and the front wall 2a and the back wall 2b.
  • the bottom space S1 is considered to constitute a part of the storage space S.
  • the first heat exchange pipe 31 is a single pipe and is provided to meander in the bottom space S1, as shown in FIG. Inside the first heat exchange tube 31, a third brine solution L3 is accommodated. As will be described later, the brine solution L3 is stable at a temperature substantially equal to the set cold temperature of the storage object.
  • a plurality of plate fins 9 and a blower 20 are provided in the bottom space S1 in addition to the first heat exchange pipe 31, a plurality of plate fins 9 and a blower 20 are provided.
  • the plate-like fins 9 are arranged on the bottom wall W1 at a predetermined interval so that their main surfaces are parallel to each other.
  • the first heat exchange pipe 31 meanders while passing through these plate-like fins 9.
  • the blower 20 When the blower 20 is operated, the air in the storage space S is blown between the plate-like fins 9 and circulates in the storage space S as indicated by arrows in FIG.
  • the number and position of the blower 20 are not particularly limited as long as the air in the storage space S can be blown between the plate fins 9.
  • the brine tank A1 is a tank for storing the brine solution L3 supplied to the first heat exchange pipe 31, and is provided below the storage space S in this modification.
  • the brine tank A1 and the storage space S are isolated by the bottom wall W1, and the brine tank A1 is defined by the bottom wall W1 and the bottom wall 2d.
  • a second heat exchange pipe 32 is provided in the brine tank A1.
  • the second heat exchange tube 32 is a multiple tube having the same cross-sectional structure as the heat exchange tube 3 in the above embodiment. That is, as shown in FIG. 13, the second heat exchange pipe 32 includes an outer pipe 32a having an outer surface facing the brine solution L3 and an inner pipe 32b provided inside the outer pipe 32a. I have. A region T1 between the outer tube 32a and the inner tube 32b contains a brine solution L1 that does not freeze at 0 ° C., and a region L2 inside the inner tube 3b contains a refrigerant L2. In addition, the 2nd brine solution may be accommodated instead of the refrigerant
  • the second heat exchange pipe 32 is provided to meander in the brine tank A1.
  • the refrigerant L2 is supplied to the inner pipe 3b of the second heat exchange pipe 32 from the refrigerator 6 shown in FIG.
  • the brine solution L1 accommodated between the outer tube 32a and the inner tube 32b is cooled by the refrigerant L2, and the brine solution L3 in the brine tank A1 is further cooled by the brine solution L1. That is, heat exchange between the refrigerant L2 and the brine solution L1 and heat exchange between the brine solution L1 and the brine solution L3 are performed.
  • the temperature of the brine solution L3 is stabilized near a desired temperature (the set cool temperature of the object to be stored in the storage space S). Can do.
  • the brine tank A1 is connected to the first heat exchange pipe 31 via the pump P1.
  • the pump P1 may be embedded in the back wall 2b, for example.
  • the brine solution L3 flows through the first heat exchange pipe 31 in the storage space S1, and then returns to the brine tank A1.
  • the brine solution L3 Since the temperature fluctuation of the brine solution L3 is very small, by flowing the brine solution L3 through the first heat exchange tube 31, the brine solution L3 has a substantially constant temperature via the first heat exchange tube 31 and the plate-like fins 9. Cold air can be supplied into the storage space S1. Therefore, the temperature in the storage space S1 can be easily maintained. Moreover, since switching of ON / OFF of the refrigerator 6 can be decreased, the power consumption of the cool box 1b can be reduced.
  • the positions of the first heat exchange pipe 31 and the plate-like fins 9 are not particularly limited as long as they are in the storage space S.
  • the first heat exchange pipe 31 and the plate-like shape are provided on the side wall or ceiling of the storage space S. Fins 9 may be provided. In that case, it is not essential to provide a plate such as the floor plate F ⁇ b> 1 that covers the first heat exchange pipe 31 and the plate-like fins 9.
  • the position of the brine tank A1 is not particularly limited as long as it is within the housing 2.
  • the brine tank A1 may be provided above the storage space S.
  • the second heat exchange pipe 32 is a double pipe, but it may be a triple pipe as shown in FIG.
  • FIG. 14 shows the internal structure of a cold box 1c according to still another modification of the present invention.
  • the appearance of the cool box 1c is the same as that shown in FIG.
  • members having the same functions as those in the above-described cold storage 1b are assigned the same reference numerals, and detailed descriptions thereof are omitted.
  • the cool box 1c is provided in the housing 2 having the storage space S for the object to be cooled inside, the first heat exchange pipe 31 provided in the storage space S, the brine tank A2, and the brine tank A2.
  • the third heat exchange pipe 33 and the fourth heat exchange pipe 34 are provided at least.
  • the structure of the installation location of the 1st heat exchange pipe 31 and the 1st heat exchange pipe 31 is the same as that in the above-mentioned cool box 1b.
  • the brine solution L3 is accommodated in the first heat exchange pipe 31, and the brine solution L3 is stable at a temperature substantially equal to the set cold temperature of the storage object.
  • the brine tank A2 is a tank for storing the brine solution L1, and is provided below the storage space S in the present modification.
  • the brine tank A2 and the storage space S are isolated by the bottom wall W1, and the brine tank A2 is defined by the bottom wall W1 and the bottom wall 2d.
  • the brine solution L1 is accommodated, and further, a third heat exchange pipe 33 and a fourth heat exchange pipe 34 are provided.
  • the third heat exchange tube 33 and the fourth heat exchange tube 34 are both single tubes.
  • the third heat exchange pipe 33 is provided to meander in the brine tank A1, and is connected to the first heat exchange pipe 31 via the pump P1. Therefore, the brine solution L ⁇ b> 3 flows through the third heat exchange pipe 33 in the same manner as the first heat exchange pipe 31.
  • the fourth heat exchange pipe 34 is also provided so as to meander in the brine tank A1.
  • the fourth heat exchange pipe 34 is supplied with the refrigerant L2 (or the second brine solution) from the refrigerator 6 shown in FIG.
  • the brine solution L1 accommodated in the brine tank A1 is cooled by the refrigerant L2, and the brine solution L3 accommodated in the third heat exchange tube 33 is further cooled by the brine solution L1. That is, similarly to the above-described cool box 1b, heat exchange between the refrigerant L2 and the brine solution L1 and heat exchange between the brine solution L1 and the brine solution L3 are performed in two stages. Therefore, the temperature of the brine solution L3 can be stabilized in the vicinity of a desired temperature (the set cool temperature of the object to be stored in the storage space S).
  • the cold storage according to the present invention can be applied to a cold storage vehicle, a cold storage container (air cargo, maritime container, railway container), a large cold storage, a refrigerated showcase, a small cold storage container, and the like.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

L'invention concerne un stockage à froid (1) comprenant un boîtier (2) qui a un espace de stockage (S) pour article à conserver à froid à l'intérieur de celui-ci, et un tube d'échangeur de chaleur (3) qui est disposé dans l'espace de stockage (S). Le tube d'échangeur de chaleur (3) est un tuyau multicouche comprenant un tuyau externe thermo-conducteur, dont la face externe fait face à l'espace de stockage (S), et un tuyau interne disposé sur l'intérieur du tuyau externe. Une première solution de saumure ne congelant pas à 0 °C est reçue entre le tuyau externe et le tuyau interne. Un fluide frigorigène ou une seconde solution de saumure qui ne se congèle pas à 0 °C est reçu dans le tuyau interne.
PCT/JP2017/011315 2016-09-08 2017-03-22 Stockage à froid de refroidissement de tuyau multicouche WO2018047387A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP17848334.3A EP3511660A4 (fr) 2016-09-08 2017-03-22 Stockage à froid de refroidissement de tuyau multicouche
KR1020187037699A KR102272197B1 (ko) 2016-09-08 2017-03-22 다중관 냉각 보냉고
US16/331,481 US10852048B2 (en) 2016-09-08 2017-03-22 Multilayer pipe cooling cold storage
CN201780039813.3A CN109416211B (zh) 2016-09-08 2017-03-22 多重管冷却冷藏库

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2016-175691 2016-09-08
JP2016175691 2016-09-08
JP2017030383A JP6300970B2 (ja) 2016-09-08 2017-02-21 多重管冷却保冷庫
JP2017-030383 2017-02-21

Publications (1)

Publication Number Publication Date
WO2018047387A1 true WO2018047387A1 (fr) 2018-03-15

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PCT/JP2017/011315 WO2018047387A1 (fr) 2016-09-08 2017-03-22 Stockage à froid de refroidissement de tuyau multicouche

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WO (1) WO2018047387A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180108A (en) * 1963-08-14 1965-04-27 Herbert C Rhodes Liquid cooling device
JPS4938948Y1 (fr) * 1970-12-29 1974-10-25
JPS5239848A (en) * 1975-09-23 1977-03-28 Hitachi Plant Eng & Constr Co Ltd Cooling apparatus
JPS61106792U (fr) * 1984-12-12 1986-07-07
JPS6358079A (ja) * 1986-08-27 1988-03-12 ホシザキ電機株式会社 恒温多湿冷蔵庫
JPH05296631A (ja) * 1992-04-20 1993-11-09 Sanden Corp 自動販売機
JP2004354007A (ja) * 2003-05-30 2004-12-16 Hoshizaki Electric Co Ltd 保存庫
JP2005009832A (ja) * 2003-06-20 2005-01-13 Hitachi Cable Ltd 二重管式熱交換器

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180108A (en) * 1963-08-14 1965-04-27 Herbert C Rhodes Liquid cooling device
JPS4938948Y1 (fr) * 1970-12-29 1974-10-25
JPS5239848A (en) * 1975-09-23 1977-03-28 Hitachi Plant Eng & Constr Co Ltd Cooling apparatus
JPS61106792U (fr) * 1984-12-12 1986-07-07
JPS6358079A (ja) * 1986-08-27 1988-03-12 ホシザキ電機株式会社 恒温多湿冷蔵庫
JPH05296631A (ja) * 1992-04-20 1993-11-09 Sanden Corp 自動販売機
JP2004354007A (ja) * 2003-05-30 2004-12-16 Hoshizaki Electric Co Ltd 保存庫
JP2005009832A (ja) * 2003-06-20 2005-01-13 Hitachi Cable Ltd 二重管式熱交換器

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