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EP1939557A1 - Structure enveloppante pour dispositif refrigerant et procede de fabrication de la structure enveloppante - Google Patents

Structure enveloppante pour dispositif refrigerant et procede de fabrication de la structure enveloppante Download PDF

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Publication number
EP1939557A1
EP1939557A1 EP06810874A EP06810874A EP1939557A1 EP 1939557 A1 EP1939557 A1 EP 1939557A1 EP 06810874 A EP06810874 A EP 06810874A EP 06810874 A EP06810874 A EP 06810874A EP 1939557 A1 EP1939557 A1 EP 1939557A1
Authority
EP
European Patent Office
Prior art keywords
plate
nut
heat insulating
seat
inner sub
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06810874A
Other languages
German (de)
English (en)
Other versions
EP1939557A8 (fr
EP1939557A4 (fr
Inventor
Yoshinori Kitamura
Hiroki Ishihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
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
Publication of EP1939557A1 publication Critical patent/EP1939557A1/fr
Publication of EP1939557A8 publication Critical patent/EP1939557A8/fr
Publication of EP1939557A4 publication Critical patent/EP1939557A4/fr
Withdrawn legal-status Critical Current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
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/065—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large 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
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/065—Details
    • F25D23/067—Supporting elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49359—Cooling apparatus making, e.g., air conditioner, refrigerator

Definitions

  • This invention relates to casing structures for refrigeration systems and methods for producing such casings.
  • Reefer containers are conventionally known that are transported while storing and cooling materials, such as food products, in their casings.
  • the casing of such a reefer container has a structure that can ensure air tightness in the interior and heat insulation between the interior and outside of the casing (see, for example, Patent Document 1).
  • Patent Document 1 The casing of a reefer container disclosed in Patent Document 1 has a heat insulating layer of expandable synthetic resin formed between a metal outer sub-casing and an integrally molded inner sub-casing made of synthetic resin, thereby ensuring air tightness and heat insulating property of the casing interior.
  • Patent Document 1 Published Japanese Patent Application No. H08-337285
  • the inner sub-casing ( 2 ) is formed with a mounting hole ( 31 ) through which a mounting bolt ( 30 ) for mounting a component ( 16 ) to the inner sub-casing ( 2 ) passes.
  • the heat insulating layer ( 4 ) contains a nut ( 40 ) disposed to correspond to the mounting hole ( 31 ) and threadedly engageable with the mounting bolt ( 30 ).
  • the nut ( 40 ) is covered with a receptacle mold ( 101 ) filled with a resin adhesive ( 100 ), and attached to the inner sub-plate ( 2 ) by an adhesion force of the adhesive ( 100 ). Therefore, if the adhesion force of the adhesive ( 100 ) is uneven, the nut ( 40 ) might be detached from the inner sub-plate ( 2 ) and come loose during screwing of the mounting bolt ( 30 ) thereinto.
  • part of the inner sub-plate ( 2 ) surrounding the mounting hole is first sanded and the sanded surface is then rinsed with an organic solvent. Subsequently, the nut ( 40 ) is put on the sanded surface and temporarily retained by a temporal bolt. Thereafter, the resin adhesive ( 100 ) is prepared and the nut ( 40 ) is covered with the receptacle mold ( 101 ) filled with the prepared adhesive ( 100 ). The adhesive ( 100 ) is cured over about 12 hours to fix the nut ( 40 ).
  • the temporal bolt is screwed off and an expandable heat insulating material, such as urethane, is charged into the space between the inner and outer sub-plates ( 2 , 3 ) to form the heat insulating layer ( 4 ). Therefore, a large number of processing steps including sanding, rinsing and adhesive mixing are needed. In addition, the time taken to cure the adhesive is long, resulting in a long production time.
  • an expandable heat insulating material such as urethane
  • an object of the present invention is a casing for a refrigeration system in which a heat insulating layer between inner and outer sub-plates contains a nut threadedly engageable with a mounting bolt for a component, wherein the fixing force of the nut can be stabilized, the casing production process can be simplified and the casing production time can be reduced.
  • a first aspect of the invention is directed to a casing structure for a refrigeration system which includes an outer sub-plate ( 3 ), an inner sub-plate ( 2 ) and a heat insulating layer ( 4 ) formed between the outer sub-plate ( 3 ) and the inner sub-plate ( 2 ) and made of a heat insulating material and in which the inner sub-plate ( 2 ) is formed with a mounting hole ( 31 ) through which a mounting bolt ( 30 ) for a component ( 16 ) passes.
  • the casing structure further includes a nut ( 40 ) disposed in the heat insulating layer ( 4 ) to correspond to the mounting hole ( 31 ) in the inner sub-plate ( 2 ) and threadedly engaged on the mounting bolt ( 30 ).
  • the casing structure further includes a turning stop piece ( 41 ) having the nut ( 40 ) secured thereto, including a seat ( 42 ) in contact with the inner sub-plate ( 2 ) and an extension ( 43 ) extending from the seat ( 42 ) towards the outer sub-plate ( 3 ) and disposed in the heat insulating layer ( 4 ) to correspond to the mounting hole ( 31 ) in the inner sub-plate ( 2 ).
  • a turning stop piece ( 41 ) having the nut ( 40 ) secured thereto, including a seat ( 42 ) in contact with the inner sub-plate ( 2 ) and an extension ( 43 ) extending from the seat ( 42 ) towards the outer sub-plate ( 3 ) and disposed in the heat insulating layer ( 4 ) to correspond to the mounting hole ( 31 ) in the inner sub-plate ( 2 ).
  • the contact area with the inner sub-plate ( 2 ) is increased by the seat ( 42 ) of the turning stop piece ( 41 ) as compared with the case where only the nut ( 40 ) is brought into contact with the inner sub-plate ( 2 ). Furthermore, since the turning stop piece ( 41 ) includes the extension ( 43 ), resistance from the heat insulating material to the seat ( 42 ) and the extension ( 43 ) in the heat insulating layer ( 4 ) is used to prevent that the nut ( 40 ) drops out of the position corresponding to the mounting hole ( 31 ) and comes loose during screwing of the mounting bolt ( 30 ) thereinto.
  • a second aspect of the invention is the casing structure for the refrigeration system according to the first aspect of the invention, wherein the seat ( 42 ) of the turning stop piece ( 41 ) is formed into a flat plate extending orthogonally to the mounting bolt ( 30 ).
  • the seat ( 42 ) is surely brought into contact with the inner sub-plate ( 2 ) to prevent loosening and dropping of the nut ( 40 ).
  • a third aspect of the invention is the casing structure for the refrigeration system according to the second aspect of the invention, wherein the extension ( 43 ) of the turning stop piece ( 41 ) is formed by being bent from one side of the seat ( 42 ) in the axial direction of the mounting bolt ( 30 ).
  • the extension ( 43 ) of the turning stop piece (41) is substantially orthogonal to the inner sub-plate ( 2 ), the resisting force of the heat insulating material surely acts on the extension ( 43 ) in the heat insulating layer ( 4 ). Furthermore, since the turning stop piece ( 41 ) is formed not by especially attaching the extension ( 43 ) to the seat ( 42 ) but by simply bending the seat ( 42 ), this reduces the number of parts constituting the turning stop piece ( 41 ) and simplifies the processing of the turning stop piece ( 41 ).
  • a fourth aspect of the invention is an example of the casing structure for the refrigeration system according to the third aspect of the invention, wherein the turning stop piece ( 41 ) is an L-piece ( 41 ) formed in an L-shaped cross section.
  • a fifth aspect of the invention is the casing structure for the refrigeration system according to the first aspect of the invention, wherein the seat ( 42 ) of the turning stop piece ( 41 ) is formed with a through hole ( 42a ) through which the mounting bolt ( 30 ) passes, and the nut ( 40 ) is welded to the turning stop piece ( 41 ) so that the threaded hole ( 40a ) of the nut ( 40 ) corresponds to the through hole ( 42a ).
  • the nut ( 40 ) is welded to the turning stop piece ( 41 ) to surely fix it to the turning stop piece ( 41 ). Furthermore, since the mounting bolt ( 30 ) is threadedly engaged in the nut ( 40 ) through the seat ( 42 ) of the turning stop piece ( 41 ), the seat ( 42 ) functions as a washer for the nut ( 40 ).
  • a sixth aspect of the invention is the casing structure for the refrigeration system according to the first aspect of the invention, wherein the seat ( 42 ) of the turning stop piece ( 41 ) is formed with a fitting hole ( 42b ) for fixing the nut ( 40 ) to the seat ( 42 ) by fitting the nut ( 40 ) into the fitting hole ( 42b ).
  • the turning stop piece ( 41 ) and the nut ( 40 ) are fixed to each other without being welded to each other, the step of securing the seat ( 42 ) to the turning stop piece ( 41 ) is simplified.
  • a seventh aspect of the invention is the casing structure for the refrigeration system according to the first aspect of the invention, wherein the extension ( 43 ) of the turning stop piece ( 41 ) is formed with a charging hole ( 43a ) for the heat insulating material.
  • An eighth aspect of the invention is directed to a method for producing a casing for a refrigeration system which includes an outer sub-plate ( 3 ), an inner sub-plate ( 2 ) and a heat insulating layer ( 4 ) formed between the outer sub-plate ( 3 ) and the inner sub-plate ( 2 ) and in which the inner sub-plate ( 2 ) is formed with a mounting hole ( 31 ) through which a mounting bolt ( 30 ) for a component ( 16 ) passes.
  • the method includes a temporarily retaining step of putting, between the outer sub-plate ( 3 ) and the inner sub-plate ( 2 ), a nut ( 40 ) threadedly engageable on the mounting bolt ( 30 ) and a turning stop piece ( 41 ) including a seat ( 42 ) with the nut ( 40 ) secured thereto and an extension ( 43 ) extending from the seat ( 42 ) in the axial direction of the mounting bolt ( 30 ), while bringing the seat ( 42 ) of the turning stop piece ( 41 ) a
  • the method further includes a heat insulating step of charging a heat insulating material between the outer sub-plate ( 3 ) and the inner sub-plate ( 2 ) to form a heat insulating layer ( 4 ).
  • the method further includes a component mounting step of removing the temporal bolt ( 45 ) and mounting a component ( 16 ) to the inner sub-plate ( 2 ) by threadedly engaging the mounting bolt ( 30 ) in the nut ( 40 ).
  • the heat insulating layer ( 4 ) is formed, after the temporal retention of the nut ( 40 ), with the heat insulating material closely charged in the part around the nut ( 40 ) and the turning stop piece ( 41 ).
  • the nut ( 40 ) is fixed in the heat insulating layer ( 4 ) by resistance acting on the seat ( 42 ) and the extension ( 43 ) of the turning stop piece ( 41 ).
  • the contact area with the inner sub-plate ( 2 ) can be increased by the seat ( 42 ) of the turning stop piece ( 41 ) as compared with the case where only the nut ( 40 ) is brought into contact with the inner sub-plate ( 2 ).
  • the turning stop piece ( 41 ) includes the extension ( 43 )
  • a resisting force that the seat ( 42 ) and the extension ( 43 ) receive from the heat insulating material in the heat insulating layer ( 4 ) can be used to prevent that the nut ( 40 ) comes loose during screwing of the mounting bolt ( 30 ) thereinto and drops out of the position corresponding to the mounting hole ( 31 ).
  • the fixing force in mounting a component ( 16 ) can be stabilized.
  • the seat ( 42 ) of the turning stop piece ( 41 ) is formed into a flat plate extending orthogonally to the mounting bolt ( 30 ), the seat ( 42 ) can be surely brought into contact with the inner sub-plate ( 2 ), which prevents loosening and dropping of the nut ( 40 ).
  • the extension ( 43 ) of the turning stop piece ( 41 ) is formed by being bent from one side of the seat ( 42 ) in the axial direction of the mounting bolt ( 30 ), the extension ( 43 ) of the turning stop piece ( 41 ) is substantially orthogonal to the inner sub-plate ( 2 ). As a result, the resisting force of the heat insulating material can surely be exerted on the extension ( 43 ) in the heat insulating layer ( 4 ).
  • the turning stop piece ( 41 ) is an L-piece ( 41 ) formed in an L-shaped cross section, the resistance of the heat insulating material can surely be exerted on the extension ( 43 ).
  • the seat ( 42 ) of the turning stop piece ( 41 ) is formed with a through hole ( 42a ) through which the mounting bolt ( 30 ) passes and the nut ( 40 ) is welded to the turning stop piece ( 41 ) so that the threaded hole ( 40a ) of the nut ( 40 ) corresponds to the through hole ( 42a ), the nut ( 40 ) can surely be fixed to the turning stop piece ( 41 ).
  • the seat ( 42 ) functions as a washer for the nut ( 40 ), which stabilizes the fastening force between the nut ( 40 ) and the mounting bolt ( 30 ).
  • the nut ( 40 ) is fixed to the seat ( 42 ) of the turning stop piece ( 41 ) by fitting the nut ( 40 ) into the fitting hole ( 42b ) in the seat ( 42 ), this eliminates the need for welding or any other joining work of the nut ( 40 ) to the seat ( 42 ) of the turning stop piece ( 41 ). Therefore, the step of securing the seat ( 42 ) to the turning stop piece ( 41 ) can be simplified.
  • the extension ( 43 ) of the turning stop piece ( 41 ) is formed with a charging hole ( 43a ) for the heat insulating material, the heat insulating material is charged through the extension ( 43 ) of the turning stop piece ( 41 ) during charging of the heat insulating material.
  • the heat insulating layer ( 4 ) can be uniformly formed with no void.
  • the resisting force of the heat insulating material surely acts on the extension ( 43 ), which prevents loosening and dropping of the nut ( 40 ).
  • the nut (40) since the nut (40) is secured to the turning stop piece ( 41 ) and the heat insulating layer ( 4 ) is formed, after the temporal retention of the nut ( 40 ), with the heat insulating material closely charged in the part around the nut ( 40 ) and the turning stop piece ( 41 ), the nut ( 40 ) can be fixed in the heat insulating layer ( 4 ) using a resisting force acting on the seat ( 42 ) and the extension ( 43 ) of the turning stop piece ( 41 ).
  • Embodiment 1 of the invention is an application to a reefer container ( 10 ).
  • the reefer container ( 10 ) includes a casing ( 11 ) and is transported by a container ship or a container car while cooling materials stored in the casing ( 11 ).
  • the casing ( 11 ) comprises a top plate ( t ), a base plate ( b ) and four side plates ( s1 , s2 , s3 , s4 ) and is formed in the shape of a substantially rectangular parallelepiped.
  • the side plate ( s1 ) located at the left front of the casing ( 11 ) as viewed in Figure 1 is a component mounting plate ( s1 ).
  • Mounted to the component mounting plate ( s1 ) are cooling components for cooling the interior of the container.
  • FIG. 2 is a cross-sectional view taken along the line A-A of Figure 1 , showing the component mounting plate ( s1 ).
  • each of the plates ( t , b , s1 , s2 , ...) constituting the casing comprises an inner sub-plate ( 2 ), an outer sub-plate ( 3 ) and a heat insulating layer ( 4 ).
  • the inner sub-plate ( 3 ) is a 3mm thick synthetic resin plate integrally formed from a synthetic resin material.
  • the outer sub-plate ( 3 ) is a 3mm thick metal plate obtained by forming a metal, such as an aluminium alloy, in the shape of a plate.
  • the heat insulating layer ( 4 ) is provided between the inner sub-plate ( 2 ) and the outer sub-plate ( 3 ) and formed by charging an expandable heat insulating material, such as urethane, between the inner sub-plate ( 2 ) and the outer sub-plate ( 3 ).
  • the plates ( t , b , s2 , s3 , s4) excluding the component mounting plate ( s1 ) are formed into flat plates.
  • the lower part of the component mounting plate ( s1 ) bends towards the interior of the container ( 10 ).
  • an outside recess ( 5 ) is formed on the outside of the container (10) and in the lower part of the component mounting plate ( s1 ), while an inside recess ( 6 ) is formed on the inside of the container ( 10 ) and in the upper part of the component mounting plate ( s1 ).
  • the outside recess ( 5 ) of the component mounting plate ( s1 ) contains a compressor ( 20 ), a condenser ( 14 ) and an expansion mechanism ( 22 ).
  • the inside recess ( 6 ) of the above side plate contains an evaporator ( 16 ).
  • the outside recess ( 5 ) of the component mounting plate ( s1 ) further contains a fan ( 18 ) for feeding outside air to the condenser ( 14 ), while the inside recess ( 6 ) of the component mounting plate ( s1 ) further contains an internal fan ( 19 ) for feeding in-container air to the evaporator ( 16 ).
  • the inner sub-plate ( 2 ) of the component mounting plate ( s1 ) has a mounting hole ( 31 ) formed therein.
  • the mounting hole ( 31 ) is for the purpose of passing therethrough a mounting bolt ( 30 ) for mounting a component.
  • 40 mounting holes ( 31 ) are formed in the inner sub-plate ( 2 ) according to the number of in-container components and the number of mounting bolts ( 30 ).
  • the heat insulating layer ( 4 ) contains nuts ( 40 ) disposed to correspond to the mounting holes ( 31 ) and L-pieces ( 41 ) disposed to correspond to the mounting holes ( 31 ) and having their respective nuts ( 40 ) secured thereto.
  • each L-piece ( 41 ) is formed by bending one side of a metal flat plate made such as of an iron sheet or a galvanized steel sheet substantially at right angles and includes a seat ( 42 ) and an extension ( 43 ).
  • the seat ( 42 ) of the L-piece ( 41 ) is formed into a flat plate and the extension ( 43 ) thereof extends substantially orthogonally from the seat ( 42 ).
  • the L-piece ( 41 ) constitutes a turning stop piece for preventing the nut ( 40 ) from turning and dropping down in the heat insulating layer ( 4 ).
  • the seat ( 42 ) of the L-piece ( 41 ) has a through hole ( 42a ), while the extension ( 43 ) thereof has charging holes ( 43a ) for a heat insulating material.
  • the seat ( 42 ) is for the purpose of passing the mounting bolt ( 30 ) therethrough.
  • the charging holes ( 43a ) are, in charging an expandable heat insulating material, for the purpose of allowing the heat insulating material to smoothly flow therethrough and thereby forming a heat insulating layer with no void.
  • Used as the L-piece ( 41 ) in this embodiment is a piece having a thickness of 1.2 mm and including an extension ( 43 ) of 8 mm extension length formed by bending one side of a 40 x 40 mm square metal flat plate.
  • the L-piece ( 41 ) is not particularly limited in dimensions and the dimensions are preferably selected appropriately according to the size of the nut ( 40 ) used and the type of heat insulating material used.
  • the nut ( 40 ) is welded to the seat ( 42 ) of the L-piece ( 41 ) so that the threaded hole ( 40a ) of the nut ( 40 ) corresponds to the through hole ( 42a ) in the seat ( 42 ) of the L-piece ( 41 ) and that the nut ( 40 ) and the extension ( 43 ) are directed in the same direction with respect to the seat ( 42 ).
  • the L-piece ( 41 ) is disposed to allow the seat ( 42 ) to come into contact with the inner sub-plate ( 2 ) so that the through hole ( 42a ) in the seat ( 42 ) corresponds to the mounting hole ( 31 ) in the inner sub-plate ( 2 ) and that the extension ( 43 ) extends towards the outer sub-plate ( 3 ).
  • the threaded hole ( 40a ) of the nut ( 40 ) corresponds via the through hole ( 42a ) in the seat ( 42 ) of the L-piece ( 40 ) to the mounting hole ( 31 ) in the inner sub-plate ( 2 ).
  • the evaporator ( 16 ) is mounted to the component mounting plate ( s1 ) by. passing the mounting bolt ( 30 ) through a bolt insertion hole ( 16a ) formed such as in the flange of the evaporator ( 16 ) and threadedly engaging the mounting bolt ( 30 ) into the nut ( 40 ) through the mounting hole ( 31 ) in the inner sub-plate ( 2 ) and the through hole ( 42a ) in the seat ( 42 ) of the L-piece ( 41 ).
  • refrigerant is discharged from the compressor ( 20 ) disposed in the outside recess ( 5 ) and flows into the condenser ( 14 ).
  • the refrigerant in the condenser ( 14 ) releases heat to outside air fed to the condenser ( 14 ) by the external fan ( 18 ) to condense into liquid refrigerant.
  • the liquid refrigerant then passes through the expansion mechanism ( 22 ) to reduce its pressure and then flows into the evaporator ( 16 ) in the inside recess ( 6 ).
  • the refrigerant in the evaporator ( 16 ) takes heat from in-container air fed to the evaporator ( 16 ) by the internal fan ( 19 ) to evaporate and thereby cool the in-container air. Then, the evaporated refrigerant returns to the compressor ( 20 ). In this manner, the interior of the reefer container ( 10 ) is cooled.
  • mounting holes ( 31 ) are formed in the inner sub-plate ( 2 ) and the inner sub-plate ( 2 ) is then opposed to the outer sub-plate ( 3 ).
  • a temporal bolt ( 45 ) is put through each mounting hole ( 31 ) in the inner sub-plate ( 2 ) from the opposite side to the outer sub-plate ( 3 ). Then, the temporal bolt ( 45 ) is threadedly engaged into a nut ( 40 ) through the through hole ( 42a ) in the seat ( 42 ) of the associated L-piece ( 41 ) to which the nut ( 40 ) is welded.
  • the seat ( 42 ) is brought into contact with the inner sub-plate ( 2 ) and the nut ( 40 ) and the L-piece ( 41 ) are temporarily retained to direct the extension ( 43 ) of the L-piece ( 41 ) towards the outer sub-plate ( 3 ).
  • the method proceeds to a heat insulating step of forming a heat insulating layer ( 4 ) between the outer sub-plate ( 3 ) and the inner sub-plate ( 2 ).
  • an expandable heat insulating material such as urethane
  • the heat insulating material is previously mixed with a foaming aid.
  • the heat insulating material is in liquid form and, as shown in the arrows in Figure 5 , flows in arbitrary directions between the outer sub-plate ( 3 ) and the inner sub-plate ( 2 ).
  • the heat insulating material flows through the charging holes ( 43a ) in the extension ( 43 ) of the L-piece ( 41 ).
  • the heat insulating material is charged closely between the inner sub-plate ( 2 ) and the outer sub-plate ( 3 ) and expands to form a heat insulating layer ( 4 ).
  • the heat insulating material also flows in a small amount into a narrow gap ( 2a ) between the seat ( 42 ) of the L-piece ( 41 ) and the inner sub-plate ( 2 ).
  • each temporal bolt ( 45 ) is first removed.
  • the heat insulating material such as urethane is initially in liquid form and has adhesiveness
  • the L-piece ( 41 ) is adhered to the inner sub-plate ( 2 ) by a small amount of heat insulating material having flowed in the gap ( 2a ) between the seat ( 42 ) of the L-piece ( 41 ) and the inner sub-plate ( 2 ).
  • the extension ( 43 ) undergoes a resisting force of the heat insulating material in the heat insulating layer ( 4 ). Therefore, the nut ( 40 ) can be fixed at a position corresponding to the mounting hole ( 31 ) without coming loose during the removal of the temporal bolt ( 45 ) and without dropping down in the heat insulating layer ( 4 ) after the removal of the temporal bolt ( 45 ).
  • a mounting bolt ( 30 ) is inserted into each bolt insertion hole ( 16a ) in the component, such as the evaporator ( 16 ), and screwed and threadedly engaged in the nut ( 40 ) through the mounting hole ( 31 ) in the inner sub-plate ( 2 ) and the through hole ( 42a ) in the seat ( 42 ) of the L-piece ( 41 ), thus being fixed to the inner sub-plate ( 2 ).
  • the heat insulating material in the heat insulating layer ( 4 ) acts as a resisting force on the extension ( 43 ) and the seat ( 42 ) of the L-piece ( 41 ), this prevents the nut ( 40 ) from coming loose and stabilizes the fixing force of the mounting bolt ( 30 ).
  • the component mounting plate ( s1 ) of the casing ( 11 ) of the reefer container ( 10 ) includes nuts ( 40 ) disposed in the heat insulating layer ( 4 ) to correspond to mounting holes ( 31 ) in the inner sub-plate ( 2 ) and their respective L-pieces ( 41 ) disposed in the heat insulating layer ( 4 ) with the nuts ( 40 ) welded thereto, and the extensions ( 43 ) of the L-pieces ( 41 ) are extended towards the outer sub-plate ( 3 ). Therefore, the resistance from the heat insulating material in the heat insulating layer ( 4 ) to the extensions ( 43 ) can be used to prevent the nuts ( 40 ) from being displaced.
  • each L-piece ( 41 ) is formed into a flat plate, the seat ( 42 ) can be surely brought into contact with the inner sub-plate ( 2 ), which surely increases the contact area with the inner sub-plate ( 2 ) as compared with the case where only the nut ( 40 ) is brought into contact with the inner sub-plate ( 2 ). Therefore, a small amount of heat insulating material in the gap ( 2a ) between the inner sub-plate ( 2 ) and the seat ( 42 ) of the L-piece ( 41 ) can significantly exert its adhesion force to fix the nut ( 40 ).
  • each mounting bolt ( 30 ) passes through the through hole ( 42a ) in the seat ( 42 ) of the associated L-piece ( 41 ) and is threadedly engaged in the threaded hole ( 40a ) of the nut ( 40 ), the seat ( 42 ) of the L-piece ( 41 ) functions as a washer to stabilize the fastening force between the nut ( 40 ) and the mounting bolt ( 30 ).
  • the component mounting plate ( s1 ) is produced through the temporarily retaining step, the heat insulating step and the component mounting step, there is no need to attach the nut ( 40 ) with an adhesive unlike the known art.
  • there is no need to cure an adhesive this reduces the casing production time.
  • the heat insulating material can be closely and uniformly charged through the charging holes ( 43a ) during the heat insulating step.
  • the heat insulating material is closely charged also around the extension ( 43 ). Therefore, the resisting force of the heat insulating material surely acts on the extension ( 43 ), which prevents loosening and dropping of the nut ( 40 ). Furthermore, heat insulation can be surely provided between the interior and outside of the container ( 10 ).
  • each L-piece ( 41 ) is formed with a fitting hole ( 42b ) in which a nut ( 40 ) is axially fitted, and the nut ( 40 ) is fixed by being fitted into the fitting hole ( 42b ). Furthermore, the mounting bolt ( 30 ) passes through the mounting hole ( 31 ) in the inner sub-plate ( 2 ) and is directly threadedly engaged in the nut ( 40 ).
  • each nut ( 40 ) can be fixed to the seat ( 42 ) of the associated L-piece ( 41 ) by fitting the nut ( 40 ) into the fitting hole ( 42b ) in the seat ( 42 ), there is no need to weld the nut ( 40 ) to the seat ( 42 ) of the L-piece ( 41 ).
  • the step of securing the nut ( 40 ) to the L-piece ( 41 ) can be simplified.
  • each L-piece ( 41 ) is formed with a through hole ( 42a ) for a mounting bolt ( 30 ) like Embodiment 1 and concurrently formed with a fitting hole ( 42b ) for a nut ( 40 ) like Embodiment 2.
  • the seat ( 42 ) of each L-piece ( 41 ) has a hole ( 42c ) passing therethrough, in which a part of the hole ( 42c ) towards the inner sub-plate ( 2 ) is a through hole ( 42a ) and a part thereof towards the outer sub-plate ( 3 ) is a fitting hole ( 42b ).
  • the nut ( 40 ) is fixed to the seat ( 42 ) of the L-piece ( 41 ) by being fitted into the fitting hole ( 42b ) in the seat ( 42 ).
  • the mounting bolt ( 30 ) passes through the mounting hole ( 31 ) in the inner sub-plate ( 2 ) and is threadedly engaged in the nut ( 40 ) through the through hole ( 42a ) in the seat ( 42 ) of the L-piece ( 41 ).
  • each L-piece ( 41 ) is formed with a through hole ( 42a ) for a mounting bolt ( 30 ) and a fitting hole ( 42b ) for a nut ( 40 ), the nut ( 40 ) can be fixed to the seat ( 42 ) of the L-piece ( 41 ) without welding the nut ( 40 ) to the seat ( 42 ).
  • the seat ( 42 ) can function as a washer for the nut ( 40 ) to stabilize the fastening force between the nut ( 40 ) and the mounting bolt ( 30 ).
  • the above embodiments may have the following configurations.
  • the turning stop piece is an L-piece ( 41 ), it only has to include a seat ( 42 ) and an extension ( 43 ) and is not particularly limited in configuration.
  • the turning stop piece in Embodiment 1 has a single extension ( 43 ), the turning stop piece may include a plurality of extensions and, for example, may be a U-piece.
  • the extension ( 43 ) has charging holes ( 43a ) for a heat insulating material, it may have no charging hole ( 43a ).
  • the extensions ( 43 ) may comprise some having a charging hole ( 43a ) and the others having no charging hole ( 43a ).
  • the extension ( 43 ) of the turning stop piece may be attached to the seat ( 42 ) such as by welding.
  • the heat insulating material in the heat insulating layer ( 4 ) is an expandable resin, such as urethane
  • it may also be some other kind of heat insulating material.
  • an expandable resin, such as urethane for the heat insulating layer ( 4 ), as shown in Figure 5 , it reaches a very small gap between the seat ( 42 ) of the L-piece ( 41 ) and the inner sub-plate ( 2 ), thereby providing a secure fixing of the nut ( 40 ) and the L-piece ( 41 ).
  • loosening and dropping of the nut ( 40 ) can be prevented by resisting forces of the seat ( 42 ) and the extension ( 43 ) of the L-piece ( 41 ).
  • the present invention is useful for casing structures for refrigeration systems and methods for producing such casings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Refrigerator Housings (AREA)
EP06810874A 2005-09-30 2006-09-29 Structure enveloppante pour dispositif refrigerant et procede de fabrication de la structure enveloppante Withdrawn EP1939557A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005287496A JP4017002B2 (ja) 2005-09-30 2005-09-30 冷凍装置のケーシング構造及びそのケーシングの製造方法
PCT/JP2006/319476 WO2007037373A1 (fr) 2005-09-30 2006-09-29 Structure enveloppante pour dispositif refrigerant et procede de fabrication de la structure enveloppante

Publications (3)

Publication Number Publication Date
EP1939557A1 true EP1939557A1 (fr) 2008-07-02
EP1939557A8 EP1939557A8 (fr) 2008-10-29
EP1939557A4 EP1939557A4 (fr) 2012-04-25

Family

ID=37899794

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06810874A Withdrawn EP1939557A4 (fr) 2005-09-30 2006-09-29 Structure enveloppante pour dispositif refrigerant et procede de fabrication de la structure enveloppante

Country Status (6)

Country Link
US (1) US20090241588A1 (fr)
EP (1) EP1939557A4 (fr)
JP (1) JP4017002B2 (fr)
CN (1) CN101278161B (fr)
AU (1) AU2006295831A1 (fr)
WO (1) WO2007037373A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4304533B2 (ja) * 2006-11-30 2009-07-29 ダイキン工業株式会社 キャップ、複層構造パネル、冷凍コンテナ及び複層構造パネルの製造方法
KR101225629B1 (ko) * 2010-04-26 2013-01-24 한화엘앤씨 주식회사 독립형 액화가스 탱크의 단열구조 및 그 형성방법
WO2021141154A1 (fr) * 2020-01-07 2021-07-15 엘지전자 주식회사 Réfrigérateur
CN113978605A (zh) * 2021-12-01 2022-01-28 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） 适用于冷藏集装箱船的组合式舱壁平台结构

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US2822850A (en) * 1952-09-17 1958-02-11 Earl E Howe Method of forming welding projections on a standard nut blank and article so formed
US3351116A (en) * 1965-12-20 1967-11-07 Marvin J Madsen Lock washer
US3802476A (en) * 1972-05-08 1974-04-09 Illinois Tool Works Screw anchor
US3826458A (en) * 1973-02-20 1974-07-30 Illinois Tool Works Plastic fastener
US3917206A (en) * 1974-04-05 1975-11-04 White Westinghouse Corp Refrigerator shelf support assembly
US4040463A (en) * 1974-07-12 1977-08-09 Eaton Corporation Fastener
JPH0512701Y2 (fr) * 1985-02-27 1993-04-02
JPH068474Y2 (ja) * 1986-11-19 1994-03-02 三洋電機株式会社 断熱箱体
US4752171A (en) * 1987-04-16 1988-06-21 Illinois Tool Works, Inc. Frictionally welded fastening anchor
US5486045A (en) * 1993-11-01 1996-01-23 Whirlpool Corporation Shelf ladder reinforcement member for a refrigeration appliance
JP3612792B2 (ja) * 1995-06-13 2005-01-19 ダイキン工業株式会社 冷凍コンテナ用冷凍装置のケーシング構造
US5655351A (en) * 1996-04-23 1997-08-12 Maytag Corporation Reinforced refrigerator door assembly and method of assembling the same
KR19980067370U (ko) * 1997-05-26 1998-12-05 배순훈 냉장고의 부품고정구
DE19908134A1 (de) * 1999-02-25 2000-08-31 Abb Alstom Power Ch Ag Sicherungsvorrichtung für eine Schraube oder eine Schraubenmutter
US9174656B2 (en) * 2005-09-23 2015-11-03 Gunderson Llc Insulative railway boxcar
US7240707B1 (en) * 2006-07-24 2007-07-10 Russell Lee Schweitzer Portable work bench station
US20090071088A1 (en) * 2007-09-19 2009-03-19 Thermo King Corporation Wall construction for insulated enclosure

Also Published As

Publication number Publication date
EP1939557A8 (fr) 2008-10-29
CN101278161B (zh) 2010-08-18
CN101278161A (zh) 2008-10-01
EP1939557A4 (fr) 2012-04-25
JP4017002B2 (ja) 2007-12-05
AU2006295831A1 (en) 2007-04-05
US20090241588A1 (en) 2009-10-01
WO2007037373A1 (fr) 2007-04-05
JP2007100982A (ja) 2007-04-19

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