US20230073535A1 - Refrigeration system for chilled storage container - Google Patents
Refrigeration system for chilled storage container Download PDFInfo
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- US20230073535A1 US20230073535A1 US18/055,009 US202218055009A US2023073535A1 US 20230073535 A1 US20230073535 A1 US 20230073535A1 US 202218055009 A US202218055009 A US 202218055009A US 2023073535 A1 US2023073535 A1 US 2023073535A1
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- cooling liquid
- thermal exchange
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 21
- 239000000110 cooling liquid Substances 0.000 claims abstract description 34
- 239000003507 refrigerant Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000000779 depleting effect Effects 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims 1
- 230000001939 inductive effect Effects 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 26
- 239000002826 coolant Substances 0.000 description 15
- 241000251468 Actinopterygii Species 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000003670 easy-to-clean Effects 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 230000002860 competitive effect Effects 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
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- 235000013361 beverage Nutrition 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
-
- 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
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
- F25D11/025—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures using primary and secondary refrigeration systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
-
- 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
- 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
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/02—Devices using other cold materials; Devices using cold-storage bodies using ice, e.g. ice-boxes
- F25D3/04—Stationary cabinets
- F25D3/045—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B29/00—Accommodation for crew or passengers not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/12—Heating; Cooling
-
- 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
- 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
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
-
- 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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
- F25D19/003—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors with respect to movable containers
-
- 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
- F25D2300/00—Special arrangements or features for refrigerators; cold rooms; ice-boxes; Cooling or freezing apparatus not covered by any other subclass
Definitions
- the present invention relates to refrigeration systems for chilled storage containers (CSC), or more particularly, to a refrigeration system for CSC's aboard boats.
- CSC chilled storage containers
- a “single-phase system” means that the system operates with a single refrigerant as the cooling agent that is delivered directly to freezer plates in the CSC.
- the design of these systems usually requires the use of rigid, typically copper, tubing to carry high pressure refrigerant in a liquid form to expansion valves which must be located in close proximity to the freezer plates. This often requires the construction of a compartment within the CSC to contain the expansion valve and other components. This system is prone to failure because in an environment with significant vibration, impact, and other stresses, the rigid lines are susceptible to failure and may leak the coolant out of the system.
- Single-phase systems also lack cooling capacity, particularly during a “recovery phase” which occurs when heat is added to the CSC, which occurs during normal opening and closing, or the addition of a heat source like a fish or other warm product like beverages.
- the systems have a low mass of cooling inertia which is a function of the volume and temperature of coolant in the CSC. Since the plates are mounted lower in the box, they often “freeze up,” meaning that ice accumulates rapidly on the plate, but the cooling effect is not evenly distributed across the box.
- FIG. 1 shows a perspective view of one embodiment of a refrigeration system for chilled storage container (CSC);
- CSC chilled storage container
- FIG. 2 shows a detailed perspective view of a CSC
- FIG. 3 shows a section view of the CSC invention, taken along line 3 - 3 of FIG. 2 ;
- FIG. 4 shows a schematic view of the a refrigeration system for chilled storage container (CSC).
- FIG. 5 shows a schematic view of an embodiment of a Control Module (CM).
- CM Control Module
- a refrigeration system for a chilled storage container (CSC) in a boat includes an input coolant tube that is configured for communication of a cooling liquid to an interior cavity of the CSC.
- An output coolant tube is configured for communication of the cooling liquid from the interior cavity of the CSC.
- a conduit is disposed in a plurality of coils that are configured to be attached to an interior sidewall of the CSC. The plurality of coils are disposed about an upper margin of the interior sidewall.
- the conduit is in communication with the input coolant tube and the output coolant tube.
- a circulation pump is provided for circulating the cooling liquid through the input coolant tube, the plurality of coils, and the output coolant tube.
- a plate is configured for attachment to the interior sidewall of the CSC.
- the plate holds the plurality of coils in a vertically spaced configuration within the interior cavity.
- an evaporator has a first channel communicating the cooling fluid and is configured for thermal exchange with a Non-Ozone Depleting Hydrofluorocarbon (NODHFC) refrigerant carried in a second channel of the evaporator.
- NODHFC Non-Ozone Depleting Hydrofluorocarbon
- a compressor or series of compressors is/are in communication with the second channel of the evaporator.
- the compressor is selectively operable to compress the low-pressure gaseous NODHFC refrigerant from the evaporator to a high-pressure gaseous state.
- a condenser has a first channel that is configured to receive the high-pressure gaseous NODHFC refrigerant from the compressor and deliver high-pressure liquid NODHFC refrigerant to the receiver.
- a second channel of the condenser is configured for thermal exchange with a circulating water source carried in a second channel of the condenser.
- the inlet of the second channel of the condenser is in communication with hoses delivering circulating water and the outlet of the condenser is in communication with hoses that expel the circulating water overboard.
- an outlet of the second channel of the condenser is in communication with the body of water.
- a two-phase thermal exchange system for extracting thermal energy from a chilled storage container (CSC) in a boat.
- the two-phase thermal exchange system includes a condenser configured for thermal exchange between a NODHFC refrigerant carried through a first channel of the condenser and a circulating water carried through a second channel of the condenser. Hoses aboard the boat deliver the circulating water from a body of water supporting the boat.
- An evaporator is configured for thermal exchange between a cooling fluid carried through a first channel of the evaporator and the NODHFC refrigerant that is carried through a second channel of the evaporator.
- a circulation pump or pumps are configured to circulate the cooling liquid between the evaporator and a plurality of coils installed to plates attached to the interior sidewall of the CSC.
- a compressor or series of compressors is/are provided for selectively compressing the NODHFC refrigerant between a low-pressure gas upon exiting the evaporator and a high-pressure gaseous state for entering the condenser.
- an expansion valve is disposed proximal to an inlet to the evaporator.
- the expansion valve is in communication with the outlet of the receiver and receives high-pressure NODHFC refrigerant liquid from the receiver. It is selectively operable by the solenoid and converts high-pressure liquid NODHFC refrigerant to a low-pressure liquid for delivery to the evaporator.
- a method of extracting thermal energy from a chilled storage container (CSC) in a boat includes circulating water from a body of water supporting the boat through a second channel of a condenser.
- the water absorbs heat from a NODHFC refrigerant circulating through a first channel of the condenser.
- a cooling liquid is also circulated through a first channel of an evaporator for thermal exchange to the NODHFC refrigerant circulating through a second channel of the evaporator.
- the cooling liquid is circulated through a conduit disposed as a plurality of coils within an interior cavity of the CSC for thermal exchange between the interior cavity of the CSC and the cooling liquid.
- embodiments of the current invention provide a two-phase refrigeration system 10 for a CSC 12 carried aboard a boat 11 .
- the two-phase refrigeration system 10 extracts heat from the CSC 12 and chills the interior cavity and airspace in an upper portion of the CSC 12 .
- a cooling liquid is circulated through a conduit disposed as a plurality of coils 14 within the CSC 12 .
- the invention takes advantage of thermodynamic properties of air, namely, cold air descends forcing warm air to rise and come in contact with the cooling coils.
- the plurality of coils 14 are installed above an ice level 24 within the interior cavity of the CSC 12 .
- the cooling liquid is circulated through an interior heat exchanger formed by the plurality of coils 14 that chills the air and slows or reduces melting of ice 24 carried within the CSC 12 .
- additional coils are added to the exterior surface of the CSC to further enhance cooling.
- ice 24 is added to CSC's to further enhance cooling.
- the greatest cause of ice 24 melting is the temperature differential between the ice 24 and that of the air above it.
- the cooling liquid circulates within the plurality of coils 14 , advantageously reduces the air temperature, and eliminates the temperature differential across this large surface area.
- the present invention maintains ice 24 better, is easy to clean, and provides a greater mass of cooling energy within the CSC 12 .
- the system 10 achieves lower temperatures in the CSC 12 because: the cooling liquid can circulate in the coils at much lower temperatures than the average temperature of Freon in a “single-phase” system, the surface area of cooling coils is much greater than the comparable surface area of the freezer plates, and the thermodynamically advantaged design of the coil location creates a natural air circulation within the CSC which aids cooling.
- the claimed system is made of high-quality parts, which have demonstrated their ability to be durable at sea.
- the claimed system confines the use of environmentally friendly hydrofluorocarbons (HFC) to the NODHFC refrigerant in the refrigeration skid 22 which is located in a protected area aboard the boat 11 .
- HFC hydrofluorocarbons
- the refrigeration gases used in competitive systems that may contain ozone depleting chlorofluorocarbons (CFC's) are circulated through rigid lines in more vulnerable areas that are susceptible to leaks.
- FIG. 1 shows a non-limiting embodiment of a two-phase refrigeration system 10 of the present invention installed on a boat 11 .
- the system may include a starboard side CSC 12 A having a conduit disposed in a plurality of cooling coils 14 A about an upper margin of the CSC 12 A.
- the conduit is made of a stainless-steel tubing.
- the plurality of cooling coils 14 A are attached to an interior sidewall of the CSC 12 A and are maintained in a vertically spaced configuration by a plurality of coil support brackets 16 .
- the starboard CSC 12 A includes an input coolant tube 20 A, and an output coolant tube 18 A extending through a sidewall of the starboard CSC 12 A and connected to a first end and a second end of the conduit, respectively.
- the port CSC 12 B includes an input coolant tube 20 B, and an output coolant tube 18 B extending through a sidewall of the port CSC 12 B and connected to a first end and a second end of the conduit, respectively.
- the two-phase refrigeration system 10 may also be configured with a port side CSC 12 B with cooling coils 14 B, a port input cooling tube 20 B, and a port output coolant tube 18 A.
- the starboard 12 A and port 12 B CSCs may be positioned where they may be conveniently opened to receive one or more fish, such as may be caught during a fishing expedition or charter.
- the CSCs 12 A, 12 B may also store other items in need of refrigeration.
- a plurality of insulated flex tubes 54 connect the input of each CSC 12 A and 12 B with a corresponding port circulation pump 36 and a starboard circulation pump 38 .
- Each of the starboard circulation pump 38 and the port circulation pump 36 may be independently controlled to circulate the cooling liquid through the coils 14 A, 14 B in the CSCs 12 A, 12 B.
- An Accumulator 40 may be provided proximal in communication with the flex tubes 54 to accommodate the expansion and contraction of the cooling liquid.
- additional CSC's 12 A & 12 B can be supported by the same refrigeration system using an additional set of insulated flex tubes 54 .
- the cooling liquid is circulated through a first circulation channel of an evaporator 26 , where thermal energy in the cooling liquid is exchanged with a chilled NODHFC refrigerant carried in a second circulation channel of the evaporator 26 .
- Thermodynamic air flow in the CSC is the result of cold air, that is denser than warm air, tends to fall and force the warmer air up within the CSC 12 .
- This brings the warm air toward the plurality of coils 14 A, 14 B where it is cooled by heat exchange with coils containing a circulating cooling liquid.
- This creates a thermodynamic circulation of air within the chilled storage containers 12 A and 12 B. This effect is enhanced by the large cooling surface area of the coils 14 and the spacing between the coils 14 which optimizes air flow.
- the claimed system exploits these thermal properties of air to extract heat from the chilled storage containers 12 A and 12 B. If the contents are ice 24 , this cooled air reduces or eliminates the temperature differential across the air/ice interface and slows or eliminates ice 24 melting.
- the two-phase refrigeration system 10 is illustrated in the schematic view of the refrigeration skid 22 , shown in FIG. 4 .
- circulating water enters a condenser 34 through flexible hoses from a source of circulating water, typically through an inlet 33 from a body of water supporting the boat 11 .
- This circulating water flows through the second channel of the condenser 34 and absorbs heat from the warm NODHFC refrigerant which is circulating in a first channel of the condenser 34 .
- the circulating water extracts heat from the NODHFC refrigerant in the condenser 34 it is routed overboard for discharge from the boat 11 via a discharge port 35 .
- the NODHFC refrigerant changes state in the condenser 34 as it is cooled by the circulating water and exits the condenser 34 as a high-pressure liquid.
- the liquid NODHFC refrigerant may be stored in a receiver 30 until it is required for cooling the liquid coolant in the evaporator 26 .
- the solenoid valve 28 A When energized by a signal from a CM, shown in FIG. 5 , the solenoid valve 28 A opens and the NODHFC refrigerant passes through an expansion valve 28 B, where it is converted into a low-pressure liquid NODHFC refrigerant.
- low-pressure liquid NODHFC refrigerant from the expansion valve 28 B enters the evaporator 26 where it absorbs heat from the cooling liquid.
- the NODHFC refrigerant changes state again in the evaporator 26 and exits as a low-pressure gas.
- the low-pressure NODHFC refrigerant gas moves to the compressor or series of compressors 32 where it increases in temperature and pressure. Then it flows back to the condenser 34 where it is cooled back into a high-pressure liquid as described in Phase 1 .
- the cooling liquid is a food grade liquid to enhance boater and food safety.
- the chilled cooling liquid is circulated by the circulation pumps 36 , 38 to be carried from the evaporator 26 and through the plurality of coils 14 A, 14 B in each CSC 12 A, 12 B.
- the plurality of coils 14 A, 14 B are chilled by the circulating cooling liquid and reduce the air temperature in each CSC 12 A, 12 B so that the temperature across the ice/air interface is optimized.
- a control module is shown in reference to FIG. 5 .
- the CM allows the operator to set a desired temperature for the air within each CSC 12 A, 12 B, and operates as a thermostat, which turns the refrigeration skid on and off as needed to maintain the air temperature.
- the CM may include a starboard pump switch 42 , a port pump switch 44 , a Liquid Line Solenoid (LLS) switch 46 , a compressor switch 48 , a power supply controller 50 , and control module 52 .
- LLS Liquid Line Solenoid
- compressor switch 48 a compressor switch 48
- control module 52 In one embodiment, data from a thermostat, contained within each CSC 12 A, 12 B is processed by the CM it and controls the operation of the system.
- the claimed system can be used to cool any container, which has access to electrical power.
- These embodiments can also include flexible radius tubes in lieu of or in combination with coils 14 to conform to irregular spaces and enable after-market installations.
- the claimed invention better maintains low temperatures, better preserves the ice 24 , is easy to clean, and provides a greater degree of temperature control within the CSC as compared to existing systems.
- the claimed system can achieve lower temperatures in the CSC because; the cooling liquid circulates at a much lower temperature than existing freezer plates can maintain, the cold surface area of the coils 14 far exceeds that of the freezer plates, and the location of the coils 14 in the upper portion of the CSC exploits the thermodynamic properties of air to create a natural air circulation which aids in the cooling process.
- the claimed invention contains a greater mass of cooling media, uses cooling media with a higher capacity to absorb heat, and more uniformly distributes cooling energy throughout the storage container 12 .
- the mass of cooling liquid combined with the significant mass of cooling coils 14 creates a thermal bank of cooling inertia, capable of quickly responding to warm air intrusions from the opening of the container 12 or from adding a heat source like a recently caught fish.
- the claimed system is made of high-quality parts, which have demonstrated their ability to be durable at sea. As a result, the system has greater reliability and the boater does not have to sacrifice cool space to create a “walled off” area to protect components of this invention.
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Abstract
A dual-phase refrigeration system for chilled storage containers (CSC) aboard boats maintains cold temperatures in the CSC by chilling the airspace in the upper portion of the CSC. A cooling liquid is circulated through coils installed on an interior sidewall about an upper margin of the CSC. The cooling liquid chills the air in the upper portion of the CSC which creates a thermodynamic airflow within the CSC which aids in cooling. The temperature of the cooling liquid is maintained by a heat exchange with a Non-Ozone Depleting Hydrofluorocarbon (NODHFC) refrigerant which, in turn, is cooled by a heat exchange with circulating water sourced from the body of water supporting the boat. If ice is added to the CSC, the cooling liquid in the coils reduces the air temperature.
Description
- This application is a continuation of U.S. patent application Ser. No. 16/717,238, Filed Dec. 17, 2019, and claims the benefit of priority of U.S. provisional application No. 62/800,623, filed on Feb. 4, 2019, the contents of which are herein incorporated by reference.
- The present invention relates to refrigeration systems for chilled storage containers (CSC), or more particularly, to a refrigeration system for CSC's aboard boats.
- Currently, cold temperatures are difficult to maintain in CSC's or other storage containers aboard boats. The natural process of warming is often accelerated by inadequate insulation, frequent opening and closing of the unit, intrusion of saltwater into the box, and the radiant heating from the sun warming the top of CSC. If the CSC contains ice for enhanced cooling, these warming processes can result in the melting of the ice.
- Current systems use a single-phase cooling system to chill freezer plates, which are inadequate for the task. A “single-phase system” means that the system operates with a single refrigerant as the cooling agent that is delivered directly to freezer plates in the CSC. The design of these systems usually requires the use of rigid, typically copper, tubing to carry high pressure refrigerant in a liquid form to expansion valves which must be located in close proximity to the freezer plates. This often requires the construction of a compartment within the CSC to contain the expansion valve and other components. This system is prone to failure because in an environment with significant vibration, impact, and other stresses, the rigid lines are susceptible to failure and may leak the coolant out of the system. Such leaks can lead to the venting of potentially ozone depleting gases like chlorofluorocarbons (CFC) used in some competitive systems. Additionally, “walling off” this space reduces the size of the chilled storage container available for use by boaters. The “walling off” process does not fully prevent, water, debris, fish blood, slime, and potentially fish meat and entrails from entering and potentially becoming trapped in the “walled-off” area, creating unsanitary conditions. The equipment in the space, including the expansion valve, is exposed to corrosive saltwater and powerful chemicals and cleaners used to try to prevent harmful bacteria growth.
- “Single-phase” systems also lack cooling capacity, particularly during a “recovery phase” which occurs when heat is added to the CSC, which occurs during normal opening and closing, or the addition of a heat source like a fish or other warm product like beverages. The systems have a low mass of cooling inertia which is a function of the volume and temperature of coolant in the CSC. Since the plates are mounted lower in the box, they often “freeze up,” meaning that ice accumulates rapidly on the plate, but the cooling effect is not evenly distributed across the box.
- There exists a need for a cooling system that removes heat and maintains any ice in the box, is easy to clean, optimizes thermodynamic effectiveness, is eco-friendly, and improves the ability to achieve low temperatures in the CSC.
-
FIG. 1 shows a perspective view of one embodiment of a refrigeration system for chilled storage container (CSC); -
FIG. 2 shows a detailed perspective view of a CSC; -
FIG. 3 shows a section view of the CSC invention, taken along line 3-3 ofFIG. 2 ; -
FIG. 4 shows a schematic view of the a refrigeration system for chilled storage container (CSC); and -
FIG. 5 shows a schematic view of an embodiment of a Control Module (CM). - In one aspect of the invention, a refrigeration system for a chilled storage container (CSC) in a boat is disclosed. The refrigeration system includes an input coolant tube that is configured for communication of a cooling liquid to an interior cavity of the CSC. An output coolant tube is configured for communication of the cooling liquid from the interior cavity of the CSC. A conduit is disposed in a plurality of coils that are configured to be attached to an interior sidewall of the CSC. The plurality of coils are disposed about an upper margin of the interior sidewall. The conduit is in communication with the input coolant tube and the output coolant tube. A circulation pump is provided for circulating the cooling liquid through the input coolant tube, the plurality of coils, and the output coolant tube.
- In some embodiments, a plate is configured for attachment to the interior sidewall of the CSC. The plate holds the plurality of coils in a vertically spaced configuration within the interior cavity.
- In some embodiments, an evaporator has a first channel communicating the cooling fluid and is configured for thermal exchange with a Non-Ozone Depleting Hydrofluorocarbon (NODHFC) refrigerant carried in a second channel of the evaporator.
- In some embodiments, a compressor or series of compressors is/are in communication with the second channel of the evaporator. The compressor is selectively operable to compress the low-pressure gaseous NODHFC refrigerant from the evaporator to a high-pressure gaseous state.
- In some embodiments, a condenser has a first channel that is configured to receive the high-pressure gaseous NODHFC refrigerant from the compressor and deliver high-pressure liquid NODHFC refrigerant to the receiver. A second channel of the condenser is configured for thermal exchange with a circulating water source carried in a second channel of the condenser. The inlet of the second channel of the condenser is in communication with hoses delivering circulating water and the outlet of the condenser is in communication with hoses that expel the circulating water overboard.
- In yet other embodiments, an outlet of the second channel of the condenser is in communication with the body of water.
- In other aspects of the invention, a two-phase thermal exchange system for extracting thermal energy from a chilled storage container (CSC) in a boat is disclosed. The two-phase thermal exchange system includes a condenser configured for thermal exchange between a NODHFC refrigerant carried through a first channel of the condenser and a circulating water carried through a second channel of the condenser. Hoses aboard the boat deliver the circulating water from a body of water supporting the boat. An evaporator is configured for thermal exchange between a cooling fluid carried through a first channel of the evaporator and the NODHFC refrigerant that is carried through a second channel of the evaporator. A circulation pump or pumps are configured to circulate the cooling liquid between the evaporator and a plurality of coils installed to plates attached to the interior sidewall of the CSC.
- In other embodiments of the system, a compressor or series of compressors is/are provided for selectively compressing the NODHFC refrigerant between a low-pressure gas upon exiting the evaporator and a high-pressure gaseous state for entering the condenser.
- In yet other embodiments, an expansion valve is disposed proximal to an inlet to the evaporator. The expansion valve is in communication with the outlet of the receiver and receives high-pressure NODHFC refrigerant liquid from the receiver. It is selectively operable by the solenoid and converts high-pressure liquid NODHFC refrigerant to a low-pressure liquid for delivery to the evaporator.
- In yet other aspects of the invention, a method of extracting thermal energy from a chilled storage container (CSC) in a boat is disclosed. The method includes circulating water from a body of water supporting the boat through a second channel of a condenser. The water absorbs heat from a NODHFC refrigerant circulating through a first channel of the condenser. A cooling liquid is also circulated through a first channel of an evaporator for thermal exchange to the NODHFC refrigerant circulating through a second channel of the evaporator. The cooling liquid is circulated through a conduit disposed as a plurality of coils within an interior cavity of the CSC for thermal exchange between the interior cavity of the CSC and the cooling liquid.
- These and other features, aspects and advantages of the present invention will become better understood with reference to the following drawings, description and claims.
- The following detailed description is of the best currently contemplated modes of carrying out exemplary embodiments of the invention. The description is not to be taken in a limiting sense but is made merely for the purpose of illustrating the general principles of the invention, since the scope of the invention is best defined by the appended claims.
- Broadly, embodiments of the current invention provide a two-
phase refrigeration system 10 for a CSC 12 carried aboard aboat 11. The two-phase refrigeration system 10 extracts heat from the CSC 12 and chills the interior cavity and airspace in an upper portion of the CSC 12. A cooling liquid is circulated through a conduit disposed as a plurality ofcoils 14 within the CSC 12. By cooling the air at the top of the CSC, the invention takes advantage of thermodynamic properties of air, namely, cold air descends forcing warm air to rise and come in contact with the cooling coils. Preferably, the plurality ofcoils 14 are installed above anice level 24 within the interior cavity of the CSC 12. The cooling liquid is circulated through an interior heat exchanger formed by the plurality ofcoils 14 that chills the air and slows or reduces melting ofice 24 carried within the CSC 12. - In another embodiment, additional coils are added to the exterior surface of the CSC to further enhance cooling.
- Often boaters add
ice 24 to CSC's to further enhance cooling. Typically, the greatest cause ofice 24 melting is the temperature differential between theice 24 and that of the air above it. The cooling liquid circulates within the plurality ofcoils 14, advantageously reduces the air temperature, and eliminates the temperature differential across this large surface area. The present invention maintainsice 24 better, is easy to clean, and provides a greater mass of cooling energy within the CSC 12. Thesystem 10 achieves lower temperatures in the CSC 12 because: the cooling liquid can circulate in the coils at much lower temperatures than the average temperature of Freon in a “single-phase” system, the surface area of cooling coils is much greater than the comparable surface area of the freezer plates, and the thermodynamically advantaged design of the coil location creates a natural air circulation within the CSC which aids cooling. Further, the claimed system is made of high-quality parts, which have demonstrated their ability to be durable at sea. The claimed system confines the use of environmentally friendly hydrofluorocarbons (HFC) to the NODHFC refrigerant in therefrigeration skid 22 which is located in a protected area aboard theboat 11. By comparison, the refrigeration gases used in competitive systems, that may contain ozone depleting chlorofluorocarbons (CFC's), are circulated through rigid lines in more vulnerable areas that are susceptible to leaks. -
FIG. 1 shows a non-limiting embodiment of a two-phase refrigeration system 10 of the present invention installed on aboat 11. The system may include astarboard side CSC 12A having a conduit disposed in a plurality of cooling coils 14A about an upper margin of theCSC 12A. Preferably, the conduit is made of a stainless-steel tubing. The plurality of cooling coils 14A are attached to an interior sidewall of theCSC 12A and are maintained in a vertically spaced configuration by a plurality ofcoil support brackets 16. - The
starboard CSC 12A includes aninput coolant tube 20A, and anoutput coolant tube 18A extending through a sidewall of thestarboard CSC 12A and connected to a first end and a second end of the conduit, respectively. Theport CSC 12B includes aninput coolant tube 20B, and anoutput coolant tube 18B extending through a sidewall of theport CSC 12B and connected to a first end and a second end of the conduit, respectively. - In some embodiments, the two-
phase refrigeration system 10 may also be configured with aport side CSC 12B with cooling coils 14B, a portinput cooling tube 20B, and a portoutput coolant tube 18A. Thestarboard 12A andport 12B CSCs may be positioned where they may be conveniently opened to receive one or more fish, such as may be caught during a fishing expedition or charter. As will be appreciated, theCSCs - A plurality of
insulated flex tubes 54 connect the input of eachCSC port circulation pump 36 and astarboard circulation pump 38. Each of thestarboard circulation pump 38 and theport circulation pump 36 may be independently controlled to circulate the cooling liquid through the coils 14A, 14B in theCSCs Accumulator 40 may be provided proximal in communication with theflex tubes 54 to accommodate the expansion and contraction of the cooling liquid. - In some embodiments, additional CSC's 12A & 12B can be supported by the same refrigeration system using an additional set of
insulated flex tubes 54. - The cooling liquid is circulated through a first circulation channel of an
evaporator 26, where thermal energy in the cooling liquid is exchanged with a chilled NODHFC refrigerant carried in a second circulation channel of theevaporator 26. - Thermodynamic air flow in the CSC is the result of cold air, that is denser than warm air, tends to fall and force the warmer air up within the CSC 12. This brings the warm air toward the plurality of coils 14A, 14B where it is cooled by heat exchange with coils containing a circulating cooling liquid. This creates a thermodynamic circulation of air within the chilled
storage containers coils 14 and the spacing between thecoils 14 which optimizes air flow. - The claimed system exploits these thermal properties of air to extract heat from the chilled
storage containers ice 24, this cooled air reduces or eliminates the temperature differential across the air/ice interface and slows or eliminatesice 24 melting. - Having previously described the second phase of the two-
phase refrigeration system 10, the two-phase refrigeration system 10 is illustrated in the schematic view of therefrigeration skid 22, shown inFIG. 4 . In the first phase, circulating water enters acondenser 34 through flexible hoses from a source of circulating water, typically through aninlet 33 from a body of water supporting theboat 11. This circulating water flows through the second channel of thecondenser 34 and absorbs heat from the warm NODHFC refrigerant which is circulating in a first channel of thecondenser 34. After the circulating water extracts heat from the NODHFC refrigerant in thecondenser 34 it is routed overboard for discharge from theboat 11 via adischarge port 35. - The NODHFC refrigerant changes state in the
condenser 34 as it is cooled by the circulating water and exits thecondenser 34 as a high-pressure liquid. The liquid NODHFC refrigerant may be stored in areceiver 30 until it is required for cooling the liquid coolant in theevaporator 26. - When energized by a signal from a CM, shown in
FIG. 5 , thesolenoid valve 28A opens and the NODHFC refrigerant passes through an expansion valve 28B, where it is converted into a low-pressure liquid NODHFC refrigerant. In phase 2, low-pressure liquid NODHFC refrigerant from the expansion valve 28B enters theevaporator 26 where it absorbs heat from the cooling liquid. The NODHFC refrigerant changes state again in theevaporator 26 and exits as a low-pressure gas. The low-pressure NODHFC refrigerant gas moves to the compressor or series ofcompressors 32 where it increases in temperature and pressure. Then it flows back to thecondenser 34 where it is cooled back into a high-pressure liquid as described in Phase 1. - In a preferred embodiment, the cooling liquid is a food grade liquid to enhance boater and food safety. The chilled cooling liquid is circulated by the circulation pumps 36, 38 to be carried from the
evaporator 26 and through the plurality of coils 14A, 14B in eachCSC CSC - A control module (CM) is shown in reference to
FIG. 5 . The CM allows the operator to set a desired temperature for the air within eachCSC starboard pump switch 42, aport pump switch 44, a Liquid Line Solenoid (LLS)switch 46, acompressor switch 48, apower supply controller 50, andcontrol module 52. In one embodiment, data from a thermostat, contained within eachCSC - In additional embodiments, the claimed system can be used to cool any container, which has access to electrical power. These embodiments can also include flexible radius tubes in lieu of or in combination with
coils 14 to conform to irregular spaces and enable after-market installations. - Advantageously, the claimed invention better maintains low temperatures, better preserves the
ice 24, is easy to clean, and provides a greater degree of temperature control within the CSC as compared to existing systems. The claimed system can achieve lower temperatures in the CSC because; the cooling liquid circulates at a much lower temperature than existing freezer plates can maintain, the cold surface area of thecoils 14 far exceeds that of the freezer plates, and the location of thecoils 14 in the upper portion of the CSC exploits the thermodynamic properties of air to create a natural air circulation which aids in the cooling process. The claimed invention contains a greater mass of cooling media, uses cooling media with a higher capacity to absorb heat, and more uniformly distributes cooling energy throughout the storage container 12. The mass of cooling liquid combined with the significant mass of cooling coils 14 creates a thermal bank of cooling inertia, capable of quickly responding to warm air intrusions from the opening of the container 12 or from adding a heat source like a recently caught fish. - In preferred embodiments, the claimed system is made of high-quality parts, which have demonstrated their ability to be durable at sea. As a result, the system has greater reliability and the boater does not have to sacrifice cool space to create a “walled off” area to protect components of this invention.
- It should be understood, of course, that the foregoing relates to exemplary embodiments of the invention and that modifications may be made without departing from the spirit and scope of the invention as set forth in the following claims.
Claims (13)
1. A chilled storage container (CSC) for a refrigeration system in a boat comprising:
a plurality of coils disposed in a spaced apart relation coupled with an interior sidewall of the CSC about an upper margin of the interior sidewall, the plurality of coils positioned above an ice fill level defined in a lower portion of an interior cavity of the CSC;
an input to the plurality of coils configured for communication of a cooling liquid into the plurality of coils;
an output to the plurality of coils configured for communication of the cooling liquid from the plurality of coils, wherein, when the cooling liquid is circulated through the plurality of coils, a thermodynamic airflow of a volume of cold air above the ice fill level is imparted by a thermal exchange between a volume of warm air contained within the upper margin of the CSC and the plurality of coils, with the volume of cold air reducing a temperature differential at an air/ice interface within the CSC.
2. The CSC of claim 1 , further comprising:
one or more coil support brackets configured for attachment to the interior sidewall of the CSC, the one or more coil support brackets retaining the plurality of coils in a vertically spaced configuration about the upper margin of the interior sidewall of the CSC.
3. The CSC of claim 2 , further comprising:
a thermostat to detect a temperature condition within the CSC.
4. A two-phase thermal exchange system for extracting thermal energy from a chilled storage container (CSC) mounted in a boat, comprising:
a condenser configured for a first thermal exchange between a non-ozone depleting hydrofluorocarbon (NODHFC) refrigerant carried through a first channel of the condenser and a source of circulating water carried through a second channel of the condenser;
an evaporator configured for a second thermal exchange between a cooling liquid carried through a first channel of the evaporator and the NODHFC refrigerant carried through a second channel of the evaporator;
a plurality of coils disposed in a spaced apart relation about an upper margin of an interior sidewall of the CSC, the plurality of coils positioned above an ice containment level defined in a lower portion of an interior cavity of the CSC; and
at least one circulation pump selectively operable to circulate the cooling liquid between the evaporator and the plurality of coils.
5. The two-phase thermal exchange system of claim 4 , wherein the source of circulating water is a body of water supporting the boat.
6. The two-phase thermal exchange system of claim 4 , further comprising:
a first insulated flex tube interconnecting the circulation pump with the plurality of coils; and
a second insulated flex tube interconnecting the plurality of coils and the evaporator.
7. The two-phase thermal exchange system of claim 4 , further comprising:
a compressor for selectively compressing the NODHFC refrigerant between a low-pressure gaseous state upon exiting the evaporator and a high-pressure gaseous state within the condenser.
8. The two-phase thermal exchange system of claim 7 , further comprising:
an expansion valve disposed proximal to an inlet to the evaporator and in communication with an outlet of a receiver, the expansion valve selectively operable to convert a high-pressure liquid NODHFC refrigerant to a low-pressure liquid for delivery to the evaporator.
9. The two-phase thermal exchange system of claim 8 , further comprising:
a skid mounted in a protected area aboard the boat, the skid configured to contain the evaporator, the compressor, and the condenser.
10. A method of extracting thermal energy from a from a chilled storage container (CSC) in a boat, comprising:
circulating a cooling liquid through a plurality of coils coupled within an upper margin of an interior cavity of the CSC, the plurality of coils disposed in a spaced apart relation above an ice fill level of the CSC; and
inducing a thermodynamic airflow of a volume cold air to the ice fill level by a thermal exchange with a volume of warm air contained within the upper margin of the CSC by a ternal exchange with the plurality of coils to reduce a temperature differential at an air/ice interface within the interior cavity of the CSC.
11. The method of claim 10 , further comprising:
circulating the cooling liquid through a first channel of an evaporator; and
circulating a non-ozone depleting hydrofluorocarbon refrigerant through a second channel of the evaporator for thermal exchange with the cooling liquid.
12. The method of claim 11 , further comprising:
circulating a non-ozone depleting hydrofluorocarbon (NODHFC) refrigerant through a first channel of a condenser, and
circulating a water source through a second channel of the condenser.
13. The method of claim 12 , further comprising:
receiving the water source from a body of water supporting the boat; and
discharging the water source to the body of water after a thermal exchange with the NODHFC in the condenser.
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US18/055,009 US20230073535A1 (en) | 2019-02-04 | 2022-11-14 | Refrigeration system for chilled storage container |
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US201962800623P | 2019-02-04 | 2019-02-04 | |
US16/717,238 US11536493B2 (en) | 2019-02-04 | 2019-12-17 | Refrigeration system for chilled storage container |
US18/055,009 US20230073535A1 (en) | 2019-02-04 | 2022-11-14 | Refrigeration system for chilled storage container |
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US16/717,238 Continuation US11536493B2 (en) | 2019-02-04 | 2019-12-17 | Refrigeration system for chilled storage container |
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US18/055,009 Pending US20230073535A1 (en) | 2019-02-04 | 2022-11-14 | Refrigeration system for chilled storage container |
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Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2746272A (en) | 1952-07-24 | 1956-05-22 | Walter H Carpenter | Method for holding shrimp |
US2931192A (en) | 1957-11-15 | 1960-04-05 | Vilter Mfg Co | Fishing boat refrigeration |
US2982109A (en) | 1960-05-12 | 1961-05-02 | Mario J Puretic | Method and apparatus for shipboard storage and refrigeration of freshly caught fish |
US3159982A (en) * | 1962-03-28 | 1964-12-08 | Max H Schachner | Refrigerated container having primary and secondary cooling circuits |
US3260065A (en) | 1964-04-01 | 1966-07-12 | Construcoes Continental Limita | Cold storage for chilled products |
US3729948A (en) | 1970-11-05 | 1973-05-01 | Ovitron Res Corp | Method for preserving comestibles |
US3696631A (en) | 1970-12-09 | 1972-10-10 | Pelayo F Valdes | Integrated modular refrigeration system |
US3961925A (en) | 1974-12-16 | 1976-06-08 | Rhoad John H | Refrigerated storage and transportation container for perishable commodities |
US4276752A (en) | 1978-09-22 | 1981-07-07 | Pax Equipment Management, Inc. | Refrigerated air cargo container |
TW568254U (en) * | 1997-01-06 | 2003-12-21 | Mitsubishi Electric Corp | Refrigerant circulating apparatus |
US6237361B1 (en) | 1999-11-17 | 2001-05-29 | Ken Broussard | Collapsible cold storage system |
US6272879B1 (en) | 2000-08-02 | 2001-08-14 | Oscar-Raul Lopez-Ordaz | Liquid chilling system |
WO2003006898A1 (en) | 2001-06-20 | 2003-01-23 | 3L Filters Ltd. | Apparatus for producing potable water and slush from sea water or brine |
US7024814B1 (en) | 2002-11-13 | 2006-04-11 | Mcdougle Frank Oneil | Fish or fish bait life preservation apparatus and method |
US20050204610A1 (en) * | 2004-03-17 | 2005-09-22 | K.M.B. Companies Of Ohio, L.L.C. | Livewell apparatus for a marine vessel |
KR100962365B1 (en) | 2009-10-07 | 2010-06-10 | 주식회사 대일 | A container for transport of live-fish |
US20160187013A1 (en) | 2014-12-29 | 2016-06-30 | Hy-Save Limited | Air Conditioning with Thermal Storage |
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US20200248931A1 (en) | 2020-08-06 |
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