US20170219270A1 - Refrigeration facility - Google Patents

Refrigeration facility Download PDF

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Publication number
US20170219270A1
US20170219270A1 US15/500,994 US201515500994A US2017219270A1 US 20170219270 A1 US20170219270 A1 US 20170219270A1 US 201515500994 A US201515500994 A US 201515500994A US 2017219270 A1 US2017219270 A1 US 2017219270A1
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United States
Prior art keywords
condensate
sensor
corrosive gas
refrigeration
container
Prior art date
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Abandoned
Application number
US15/500,994
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English (en)
Inventor
Kazuma Yokohara
Kazuhide Mizutani
Makoto Ikemiya
Noritaka KAMEI
Naohiro Tanaka
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Daikin Industries Ltd
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Daikin Industries Ltd
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
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Assigned to DAIKIN INDUSTRIES, LTD. reassignment DAIKIN INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IKEMIYA, MAKOTO, KAMEI, Noritaka, TANAKA, NAOHIRO, YOKOHARA, KAZUMA, MIZUTANI, KAZUHIDE
Publication of US20170219270A1 publication Critical patent/US20170219270A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • 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
    • F25D11/003—Transport 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/142—Collecting condense or defrost water; Removing condense or defrost water characterised by droplet guides
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/143—Collecting condense or defrost water; Removing condense or defrost water characterised by means to fix, clamp, or connect water pipes or evaporation trays
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/146—Collecting condense or defrost water; Removing condense or defrost water characterised by the pipes or pipe connections
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/36—Visual displays
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor

Definitions

  • the present invention relates to a refrigeration facility, which includes a refrigeration device cooling an interior of a storage chamber, and more specifically to a technique for lowering the risk of corrosion of components installed in the interior of the storage chamber.
  • Refrigeration containers used in, e.g., marine transportation are known in the art as refrigeration facilities provided with a refrigeration device for cooling an interior of a container.
  • Such refrigeration containers include a container refrigeration device cooling the interior of a container body.
  • Refrigeration storages and cold storages are also known in the art as a refrigeration facilities cooling an interior of a container.
  • Patent Document 1 discloses a container refrigeration device.
  • This container refrigeration device is installed at a front opening of a container.
  • the container refrigeration device includes a frame, at a lower side of which an outside storage space facing an exterior of the container is formed.
  • a compressor, a condenser, an exterior fan, and other components are installed in this outside storage space.
  • an inside storage space facing an interior of the container is formed at an upper side of the frame.
  • An evaporator and an interior fan are installed in this inside storage space.
  • the compressor, the condenser and the evaporator are connected by a refrigerant pipe thus forming a refrigerant circuit.
  • a refrigerating cycle is operated as a refrigerant is circulated through this refrigerant circuit, and air inside the container is cooled by the evaporator.
  • PATENT DOCUMENT 1 Japanese Unexamined Patent Publication No. 2004-325022
  • fumigation is applied to sterilize an interior of the container.
  • cases have occurred where components installed inside the container have suffered from corrosion due to fumigants released during fumigation, as well as due to gases (e.g., SO 2 ) emerging from disinfectant wipes.
  • Corrosion may occur on components made of copper (pipes, temperature thermistors etc.), aluminum (fan blades, plate members etc.), or stainless steel.
  • Components suffering from corrosion need to be repaired or exchanged. Moreover, while the corrosion of components can be detected after the fact, it is difficult to estimate in advance whether corrosion is imminent. A procedure is conceivable where, for example, a worker surveys whether air inside the container contains SO 2 and, based on results of this survey, estimates the possibility of corrosion. This, however, is no realistic procedure.
  • the corrosion of components is a problem occurring not only in refrigeration containers. It may also occur in refrigeration facilities such as refrigeration storages and cold storages.
  • the present invention attempts to provide a technique for easily surveying corrosion of components installed inside a refrigeration facility.
  • a first aspect of the present disclosure relates to a refrigeration facility including a refrigeration device ( 10 ), which cools an interior of a storage chamber and has an evaporator ( 24 ) allowing air inside the container to pass through, the refrigeration facility including: a condensate treatment unit ( 40 ) including a condensate collection unit ( 41 ) collecting condensate water generated by the evaporator ( 24 ) and a condensate disposal unit ( 42 ) disposing condensate water from the condensate collection unit ( 41 ); and a corrosive gas detector ( 50 ) installed in the condensate treatment unit ( 40 ) to detect corrosive gas in air inside the container based on properties of the condensate water.
  • a condensate treatment unit ( 40 ) including a condensate collection unit ( 41 ) collecting condensate water generated by the evaporator ( 24 ) and a condensate disposal unit ( 42 ) disposing condensate water from the condensate collection
  • the corrosive gas detector ( 50 ) by using the corrosive gas detector ( 50 ) to examine the properties of the condensate water, it may be detected whether corrosion of components installed inside the container is imminent.
  • the corrosive gas detector ( 50 ) may be installed in the condensate disposal unit ( 42 ).
  • the corrosive gas detector ( 50 ) is installed in the condensate disposal unit ( 42 ).
  • the corrosive gas detector ( 50 ) may as well be installed in the condensate collection unit ( 41 ). Since, however, the condensate disposal unit ( 42 ) may be installed at an arbitrary spot in the refrigeration facility, in the second aspect corrosive gas detection may be performed easily at an arbitrary location.
  • the refrigeration device ( 10 ) may be a container refrigeration device ( 10 ) including a casing ( 12 ) mounted to a container ( 11 ), the condensate disposal unit ( 42 ) may be a drain hose ( 42 ) connected to the condensate collection unit ( 41 ), the drain hose ( 42 ) may have a part at a condensate disposal side located in an external storage space (S 1 ), which is formed in the casing ( 12 ) so as to house refrigerant circuit components of the refrigeration device ( 10 ), and the corrosive gas detector ( 50 ) may be installed in the drain hose ( 42 ) at a location inside the external storage space (S 1 ).
  • corrosive gas inside the container may be detected by using the corrosive gas detector ( 50 ) installed in the drain hose ( 42 ) provided in the exterior storage space (S 1 ), which is easy to access for maintenance.
  • a condensate trap ( 44 ) may be formed in the drain hose ( 42 ) at a location inside the external storage space (S 1 ), and the corrosive gas detector ( 50 ) may be installed in the condensate trap ( 44 ) of the drain hose ( 42 ).
  • the condensate trap ( 44 ) is installed in the drain hose ( 42 ). As condensate accumulates in the condensate trap ( 44 ), corrosive gas detection may be performed easily based on the properties of the accumulated condensate water.
  • the condensate trap ( 44 ) may include a first U-turn ( 44 a ) curving downward and a second U-turn ( 44 b ) curving upward, which are formed in the run of the drain hose ( 42 ) and connected from upstream to downstream, and the corrosive gas detector ( 50 ) may be installed in the second U-turn portion ( 44 b ) and located above a level of condensate water accumulated in the first U-turn ( 44 a ) when the condensate water flows through the second U-turn ( 44 b ).
  • condensate water accumulates in the first U-turn ( 44 a ) of the condensate trap ( 44 ).
  • the corrosive gas detector ( 50 ) may perform corrosive gas detection based on the water properties gained from information regarding the condensate water.
  • the condensate water seals off an end of the drain hose ( 42 ) inside the container from an end of the drain hose ( 42 ) at a disposal side.
  • the corrosive gas detector ( 50 ) may be a condensate port ( 43 ) including a portable pH sensor ( 45 ), which measures a pH value as a property of the condensate water.
  • installing the portable pH sensor ( 45 ) in the condensate port ( 43 ), which is provided for a refrigeration facility such as a refrigeration container or a refrigeration storage, allows for detecting corrosive gas inside the container.
  • the corrosive gas detector ( 50 ) may include a stationary pH sensor ( 47 ) measuring the pH value as the property of the condensate water, and the refrigeration facility may further include a measurement result display ( 48 ) connected to the pH sensor and displaying measurement results provided by the sensor.
  • the pH sensor ( 47 ) is permanently installed in a refrigeration facility such as a refrigeration container or a refrigeration storage and detects corrosive gas inside the refrigeration facility. Measurement results provided by the pH sensor ( 47 ) are displayed on the measurement result display ( 48 ).
  • the corrosive gas detector ( 50 ) by using the corrosive gas detector ( 50 ) to examine properties of the condensate water, it may be easily determined whether corrosion of the components installed inside the container is imminent. Thus, an imminent corrosion of the components inside the container may be delayed by cleaning the interior of the container. Further, in the first aspect of the present disclosure, simply installing the corrosive gas detector ( 50 ) in the condensate treatment unit ( 40 ) may reduce the risk of failures of the refrigeration device and may cut costs to a minimum.
  • the corrosive gas detector ( 50 ) is installed in the condensate disposal unit ( 42 ), the installation location of which may be chosen relatively freely within the refrigeration device. Therefore, corrosive gas detection for the interior of the container may be performed even outside the container, which improves efficiency in performing the detection procedure.
  • disposing the drain hose ( 42 ) in the external storage space (S 1 ) of the container refrigeration device ( 10 ) and installing the corrosive gas detector ( 50 ) in the drain hose ( 42 ) allows for performing corrosive gas detection for the interior of the container ( 11 ) in the external storage space (S 1 ), which is easy to access for maintenance.
  • installing the condensate trap ( 44 ) in the drain hose ( 42 ) and having the condensate water accumulate in the condensate trap ( 44 ) may allow for easily performing corrosive gas detection based on the properties of the accumulated condensate water as well as for maintaining an uncomplicated configuration.
  • the corrosive gas detector ( 50 ) is installed above the level of the condensate water accumulated in the first U-turn ( 44 a ) of the condensate trap ( 44 ) when the condensate water flows out of the second U-turn ( 44 b ).
  • this corrosive gas detector ( 50 ) may allow for easily and accurately performing corrosive gas detection based on the properties of the condensate water gained from information regarding the condensate water level.
  • it is superfluous to provide a sealant for preventing water leakage from the condensate port ( 43 ) an uncomplicated configuration may be maintained.
  • installing the condensate port ( 43 ) in a refrigeration facility such as a refrigeration container or a refrigeration storage allows for easily detecting corrosive gas in an interior of the refrigeration facility by using the portable pH sensor ( 45 ).
  • the pH sensor ( 45 ) is permanently installed in a refrigeration facility such as a refrigeration container or a refrigeration storage, and measurement results provided by the pH sensor ( 47 ) are displayed on the measurement result display ( 46 ).
  • a concentration of corrosion gas in the interior of the refrigeration facility is high, an alarm signal may be given out to prompt cleaning of the interior of the refrigeration facility. Further, by re-performing the corrosion gas detection after the cleaning, it may be determined whether the interior of the refrigeration facility is clean.
  • FIG. 1 is a perspective view of a container refrigeration device according to an embodiment of the present invention when viewed from outside the container.
  • FIG. 2 is a cross-sectional side view illustrating a configuration of the container refrigeration device according to the embodiment.
  • FIG. 3 is a piping system diagram illustrating a configuration of a refrigerant circuit of the embodiment.
  • FIG. 4 is a front view of the container refrigeration device having an electrical component box removed.
  • FIG. 5 is a perspective view of the container refrigeration device having the electrical component box, a condenser and a gas mixture supply device removed.
  • FIG. 6 is a side view showing a part of a drain hose at a condensate disposal side.
  • FIG. 7 is a back view of the container refrigeration device.
  • FIG. 8 is a partial cross-sectional view of the container refrigeration device.
  • FIG. 9 is a side view illustrating a part of the condensate disposal side according to a variation of the embodiment.
  • FIG. 10 is a side view illustrating a part of the drain hose at a condensate disposal side according to another variation of the embodiment.
  • a container refrigeration device ( 10 ) is designed to cool or to refrigerate an interior of a container ( 11 ) used in, e.g., marine transportation.
  • the container refrigeration device ( 10 ) includes a refrigerant circuit ( 20 ) employing a refrigerating cycle to cool air in the container ( 11 ) (see FIG. 3 ).
  • the interior of a container ( 11 ) is loaded with plants ( 15 ) packed in boxes, such as grapes.
  • the container ( 11 ) has the shape of a box with an open end.
  • a casing ( 12 ) is attached to close this one open end.
  • the casing ( 12 ) includes an exterior wall ( 12 a ) located outside the container ( 11 ) and an interior wall ( 12 b ) located inside the container ( 11 ).
  • the exterior and interior walls ( 12 a ) and ( 12 b ) may be made of, for example, aluminum alloy.
  • the exterior wall ( 12 a ) is attached to a periphery of the opening of the container ( 11 ) so as to close the open end of the container ( 11 ).
  • the exterior wall ( 12 a ) is formed such that a lower part of the exterior wall ( 12 a ) protrudes into the container ( 11 ).
  • the interior wall ( 12 b ) faces the exterior wall ( 12 a ).
  • the interior wall ( 12 b ) fits the lower part of the exterior wall ( 12 a ), and protrudes into the container.
  • a thermal insulator ( 12 c ) is provided in a space between the interior and exterior walls ( 12 b ) and ( 12 a ).
  • a lower part of the casing ( 12 ) is formed so as to protrude into the container ( 11 ).
  • an external storage space (S 1 ) is formed outside the container ( 11 ) in the lower part of the casing ( 12 )
  • an internal storage space (S 2 ) is formed inside the container ( 11 ) in an upper part of the casing ( 12 ).
  • the casing ( 12 ) has two access doors ( 16 ), which are arranged side by side in a width direction and can be opened and closed during maintenance.
  • a partition plate ( 18 ) is located inside the container ( 11 ).
  • This partition plate ( 18 ) is a substantially rectangular plate member, and stands upright against a face of the casing ( 12 ) inside the container ( 11 ).
  • This partition plate ( 18 ) separates the internal storage space (S 2 ) from the interior of the container ( 11 ).
  • a suction port ( 18 a ) is formed between an upper end of the partition plate ( 18 ) and a ceiling surface of the container ( 11 ). Air inside the container ( 11 ) is taken through the suction port ( 18 a ) into the internal storage space (S 2 ).
  • a floorboard ( 19 ) is provided inside the container ( 11 ), leaving a gap between the floorboard ( 19 ) and a bottom surface of the container ( 11 ).
  • the boxed plants ( 15 ) are placed on the floorboard ( 19 ).
  • An air passage ( 19 a ) is formed between the floorboard ( 19 ) and the bottom surface of the container ( 11 ).
  • a gap is left between a lower end of the partition plate ( 18 ) and the bottom surface of the container ( 11 ) and communicates with the air passage ( 19 a ).
  • a blowout port ( 18 b ) is provided at a front side of the container ( 11 ) at the floorboard ( 19 ) (on the right in FIG. 2 ) for blowing air treated by the container refrigeration device ( 10 ) (i.e., cooled air inside the container) into the container ( 11 ).
  • the container refrigeration device ( 10 ) includes a refrigerant circuit ( 20 ) in which a vapor compression refrigeration cycle is operated as a refrigerant is circulated.
  • the refrigerant circuit ( 20 ) includes a compressor ( 21 ), a condenser ( 22 ), an expansion valve ( 23 ), and an evaporator ( 24 ), which are connected by a refrigerant pipe ( 28 ) in this order.
  • the compressor ( 21 ) and the condenser (external heat exchanger) ( 22 ) are housed in the external storage space (S 1 ).
  • the external fan ( 25 ) is located above the condenser ( 22 ).
  • the external fan ( 25 ) is driven in rotation by an external fan motor ( 25 a ), guides air outside the container ( 11 ) into the external storage space (S 1 ), and sends the air to the condenser ( 22 ).
  • heat is exchanged between a refrigerant flowing through the condenser ( 22 ) and the outside air.
  • the evaporator ( 24 ) is housed in the internal storage space (S 2 ).
  • Two internal fans ( 26 ) are located above the evaporator ( 24 ) in the internal storage space (S 2 ) and arranged side by side in the width direction of the casing ( 12 ).
  • the internal fans ( 26 ) are driven in rotation by internal fan motors ( 26 a ), and guide the air inside the container ( 11 ) through the suction port ( 18 a ) to send the air into the evaporator ( 24 ).
  • heat is exchanged between a refrigerant flowing through the evaporator ( 24 ) and the air inside the container.
  • the air inside the container is cooled when passing through the evaporator ( 24 ) as heat is dissipated by the refrigerant, and is then blown via the air passage ( 19 a ) from the blowout port ( 18 b ) into the container ( 11 ).
  • the container refrigeration device ( 10 ) includes a gas mixture supply device ( 30 ) for regulating oxygen concentration inside the container by supplying a gas mixture, which has a low oxygen concentration, into the container ( 11 ).
  • the gas mixture supply device ( 30 ) is a unit located in a lower left corner of the external storage space (S 1 ) as shown in FIG. 1 .
  • An inverter box ( 29 ) housing a drive circuit for driving the compressor ( 21 ) at a variable velocity is located to the right of the gas mixture supply device ( 30 ).
  • FIG. 4 is a front view of the container refrigeration device ( 10 ) having the electrical component box ( 17 ) removed.
  • FIG. 5 is a perspective view of the container refrigeration device ( 10 ) having the electrical component box ( 17 ), the condenser ( 22 ), and a gas mixture supply device ( 30 ) removed.
  • FIG. 6 is a side view showing a part of a condensate disposal side of the drain hose ( 42 ).
  • FIG. 7 is a back view of the container refrigeration device ( 10 )
  • FIG. 8 is a partial cross-sectional view of the container refrigeration device ( 10 ).
  • a drain pan (condensate collection unit) ( 41 ) collecting condensate water generated by the evaporator ( 24 ) is provided at a bottom of the internal storage space (S 2 ).
  • This drain pan ( 41 ) has an inclined face which becomes lower from both ends toward a center of the casing ( 12 ).
  • the drain hose (condensate disposal unit) ( 42 ) which disposes condensate water from the drain pan ( 41 ), is connected to a center of the drain pan ( 41 ) and extends into the external storage space (S 1 ).
  • the drain pan ( 41 ) and the drain hose ( 42 ) form the condensate treatment unit ( 40 ).
  • the drain hose ( 42 ) has a part at the condensate disposal side located in the external storage space (S 1 ), which is formed in the casing ( 12 ) so as to house components of the refrigerant circuit ( 20 ).
  • the drain hose ( 42 ) includes the condensate port ( 43 ), which is located inside the external storage space (S 1 ).
  • the condensate trap ( 44 ) is formed in the drain hose ( 42 ) inside the external storage space (S 1 ), and the condensate port ( 43 ) is installed in the condensate trap ( 44 ) of the drain hose ( 42 ).
  • the condensate port ( 43 ) may include a portable corrosive gas sensor ( 45 ) detecting corrosive gas in the air inside the container based on properties of the condensate water.
  • a condensate port ( 43 ) is a port detecting corrosive gas in the air inside the container based on the properties of the condensate water, and forms the corrosive gas detector ( 50 ) of the present invention.
  • a portable pH sensor measuring a hydrogen ion exponent (pH value) of the condensate water may be employed as the portable corrosive gas sensor ( 45 ).
  • the condensate trap ( 44 ) specifically includes a first U-turn ( 44 a ) curving downward and a second U-turn ( 44 b ) curving upward, which are formed in the run of the drain hose ( 42 ) and connected from upstream to downstream.
  • the condensate port ( 43 ) which is the corrosive gas detector ( 50 ), is installed in the second U-turn portion ( 44 b ) and located above a level of condensate water accumulated in the first U-turn ( 44 a ) when the condensate water flows through the second U-turn ( 44 b ).
  • the pH sensor ( 45 ) While detecting corrosive gas inside the container, the pH sensor ( 45 ) is installed in the condensate port ( 43 ) and examines the properties (pH value) of the condensate water.
  • a low pH value detected by the pH sensor ( 45 ) signifies a high acidity and it may be concluded that corrosion of components installed inside the container is imminent since it may be assumed that acid gasses contained in the air inside the container may be found dissolved in the condensate water. In the case where corrosion inside the container is imminent, it is beneficial to clean the interior of the container.
  • a high pH value signifies a low acidity, which may lead to the conclusion that corrosion of components installed inside the container is not imminent.
  • the condensate port ( 43 ) is installed in the drain hose ( 42 ) and serves as the corrosive gas detector ( 50 ).
  • the pH sensor ( 45 ) is installed in this condensate port ( 43 ) to measure the pH value of the condensate water. In this way it may be determined whether the condensate water has a high acidity, and thus it may be easily determined whether corrosion of the components installed inside the container is imminent. If corrosion of the components installed inside the container is imminent, it is beneficial to clean the interior of the container.
  • the drain trap ( 44 ) is formed in the drain hose ( 42 ), and the condensate port ( 43 ) is installed in the condensate trap ( 44 ).
  • the pH sensor ( 45 ) may be securely introduced into the condensate water. This may make corrosion gas detection more precise.
  • the condensate port ( 43 ), which is the corrosive gas detector ( 50 ), is installed above the level of the condensate water accumulated in the first U-turn ( 44 a ) of the condensate trap ( 44 ) when the condensate water flows out of the second U-turn ( 44 b ).
  • the condensate port ( 43 ) above the level of the condensate water may perform the corrosive gas detection easily and accurately based on the properties of the condensate water accumulated in the first U-turn ( 44 a ) of the condensate trap ( 44 ).
  • an uncomplicated configuration may be maintained.
  • condensate water accumulates in the first U-turn ( 44 a ), an end of the drain hose ( 42 ) inside the container and an end of the drain hose ( 42 ) at a disposal side are sealed off by the condensate water.
  • the condensate water accumulated in the first U-turn ( 44 a ) serves as a seal and keeps air from entering the container.
  • the above embodiment may have the following configurations.
  • the present invention is applied to the container ( 11 ) including the container refrigeration device ( 10 ) cooling the interior of the container.
  • the present invention is not limited to the container ( 11 ).
  • the present invention may be for example applied to a refrigeration storage or a cold storage, given that the refrigeration storage or cold storage is a refrigeration facility, which includes a refrigeration device cooling the interior of the facility, and that this refrigeration device has an evaporator, which allows air inside the facility to pass through.
  • a stationary pH sensor ( 47 ) serving as the corrosive gas detector ( 50 ) may be installed in the drain hose ( 42 ) instead.
  • a measurement result display ( 48 ) which is connected to the pH sensor ( 47 ) and displays measurement results provided by the pH sensor ( 47 ), is installed in the container refrigeration device ( 10 ) (see FIG. 1 ).
  • FIG. 1 shows an example where the measurement result display ( 48 ) is installed in the electrical component box ( 17 ). Installing the measurement result display ( 46 ) allows for giving out a warning signal to prompt cleaning of the interior of the container. Further, by re-performing the corrosion gas detection after the cleaning, it may be determined whether the interior of the container is clean.
  • the corrosive gas detector ( 50 ) is installed in the drain hose ( 42 ).
  • the corrosive gas detector ( 50 ) may as well be installed in the drain pan ( 41 ).
  • an installation location different from that in the above embodiment may be chosen.
  • the present invention is useful for a technique for lowering the risk of corrosion of components installed inside a refrigeration facility, which includes a refrigeration device cooling an interior of the refrigeration facility.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Removal Of Water From Condensation And Defrosting (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
US15/500,994 2014-09-16 2015-06-23 Refrigeration facility Abandoned US20170219270A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2014188190A JP5949864B2 (ja) 2014-09-16 2014-09-16 コンテナ冷凍設備
JP2014-188190 2014-09-16
PCT/JP2015/003143 WO2016042690A1 (ja) 2014-09-16 2015-06-23 冷凍設備

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US20180313595A1 (en) * 2012-10-29 2018-11-01 Solercool Ltd. Cold storage arrangement and related methods

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JP6863427B2 (ja) * 2019-09-30 2021-04-21 ダイキン工業株式会社 コンテナ用冷凍装置

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EP3168555B1 (en) 2020-11-11
DK3168555T3 (da) 2021-02-01
CN106605113B (zh) 2019-08-06
JP5949864B2 (ja) 2016-07-13
WO2016042690A1 (ja) 2016-03-24
CN106605113A (zh) 2017-04-26
EP3168555A1 (en) 2017-05-17
CL2017000633A1 (es) 2017-11-17
EP3168555A4 (en) 2018-03-14

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