US20090241588A1 - Casing Structure for Refrigeration System and Method for Producing Casing Therefor - Google Patents
Casing Structure for Refrigeration System and Method for Producing Casing Therefor Download PDFInfo
- Publication number
- US20090241588A1 US20090241588A1 US11/992,662 US99266206A US2009241588A1 US 20090241588 A1 US20090241588 A1 US 20090241588A1 US 99266206 A US99266206 A US 99266206A US 2009241588 A1 US2009241588 A1 US 2009241588A1
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- US
- United States
- 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.)
- Abandoned
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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
- 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
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- 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).
- 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 ( 1 ) 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 ( 42 a ) through which the mounting bolt ( 30 ) passes, and the nut ( 40 ) is welded to the turning stop piece ( 41 ) so that the threaded hole ( 40 a ) of the nut ( 40 ) corresponds to the through hole ( 42 a ).
- 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 ( 42 b ) for fixing the nut ( 40 ) to the seat ( 42 ) by fitting the nut ( 40 ) into the fitting hole ( 42 b ).
- 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 ( 43 a ) 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 ) into contact with the inner sub-plate ( 2 ), and threadedly engaging a temporal bolt ( 45 ) through the mounting hole in the inner sub-plate ( 2 ) into the nut to retain the temporal bolt ( 45 ) to the inner sub-plate ( 2 ).
- 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 ( 42 a ) through which the mounting bolt ( 30 ) passes and the nut ( 40 ) is welded to the turning stop piece ( 41 ) so that the threaded hole ( 40 a ) of the nut ( 40 ) corresponds to the through hole ( 42 a ), 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 ( 42 b ) 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 ( 43 a ) 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 ).
- FIG. 1 is a perspective view showing the structure of a reefer container according to Embodiment 1.
- FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1 , showing a component mounting plate of the reefer container according to Embodiment 1.
- FIG. 3 is a cross-sectional view of a necessary part of the component mounting plate in Embodiment 1, illustrating a mounting structure of an in-container component.
- FIG. 4 is a perspective view showing the structure of an L-piece in Embodiment 1 and a nut secured to the L-piece.
- FIG. 5 is a view showing a production process for the component mounting plate of the reefer container according to Embodiment 1.
- FIG. 6 is a cross-sectional view of a component mounting plate in Embodiment 2, illustrating a mounting structure of an in-container component.
- FIG. 7 is a cross-sectional view of a component mounting plate in a modification of Embodiment 2, illustrating a mounting structure of an in-container component.
- FIG. 8 is a cross-sectional view of a casing showing a known art, in which a nut is fixed to an inner sub-plate with an adhesive.
- 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 (s 1 , s 2 , s 3 , s 4 ) and is formed in the shape of a substantially rectangular parallelepiped.
- the side plate (s 1 ) located at the left front of the casing ( 11 ) as viewed in FIG. 1 is a component mounting plate (s 1 ).
- Mounted to the component mounting plate (s 1 ) are cooling components for cooling the interior of the container.
- FIG. 2 is a cross-sectional view taken along the line A-A of FIG. 1 , showing the component mounting plate (s 1 ).
- each of the plates (t, b, s 1 , s 2 , . . . ) 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 3 mm thick synthetic resin plate integrally formed from a synthetic resin material.
- the outer sub-plate ( 3 ) is a 3 mm 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, s 2 , s 3 , s 4 ) excluding the component mounting plate (s 1 ) are formed into flat plates.
- the lower part of the component mounting plate (s 1 ) 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 (s 1 )
- an inside recess ( 6 ) is formed on the inside of the container ( 10 ) and in the upper part of the component mounting plate (s 1 ).
- the outside recess ( 5 ) of the component mounting plate (s 1 ) 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 (s 1 ) further contains a fan ( 18 ) for feeding outside air to the condenser ( 14 ), while the inside recess ( 6 ) of the component mounting plate (s 1 ) 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 (s 1 ) 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 ( 42 a ), while the extension ( 43 ) thereof has charging holes ( 43 a ) for a heat insulating material.
- the seat ( 42 ) is for the purpose of passing the mounting bolt ( 30 ) therethrough.
- the charging holes ( 43 a ) 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 ⁇ 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 ( 40 a ) of the nut ( 40 ) corresponds to the through hole ( 42 a ) 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 ( 42 a ) 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 ( 40 a ) of the nut ( 40 ) corresponds via the through hole ( 42 a ) 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 (s 1 ) by passing the mounting bolt ( 30 ) through a bolt insertion hole ( 16 a ) 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 ( 42 a ) 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 ( 42 a ) 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 FIG. 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 ( 43 a ) 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 ( 2 a ) 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 ( 2 a ) 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 ( 16 a ) 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 ( 42 a ) 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 (s 1 ) 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 ( 2 a ) 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 ( 42 a ) in the seat ( 42 ) of the associated L-piece ( 41 ) and is threadedly engaged in the threaded hole ( 40 a ) 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 (s 1 ) 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 ( 43 a ) 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 ).
- a fitting hole ( 42 b ) is formed for axial fitting of the nut ( 40 ) therein as shown in FIG. 6 .
- each L-piece ( 41 ) is formed with a fitting hole ( 42 b ) in which a nut ( 40 ) is axially fitted, and the nut ( 40 ) is fixed by being fitted into the fitting hole ( 42 b ). 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 ( 42 b ) 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 ( 42 a ) for a mounting bolt ( 30 ) like Embodiment 1 and concurrently formed with a fitting hole ( 42 b ) for a nut ( 40 ) like Embodiment 2.
- the seat ( 42 ) of each L-piece ( 41 ) has a hole ( 42 c ) passing therethrough, in which a part of the hole ( 42 c ) towards the inner sub-plate ( 2 ) is a through hole ( 42 a ) and a part thereof towards the outer sub-plate ( 3 ) is a fitting hole ( 42 b ).
- the nut ( 40 ) is fixed to the seat ( 42 ) of the L-piece ( 41 ) by being fitted into the fitting hole ( 42 b ) 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 ( 42 a ) in the seat ( 42 ) of the L-piece ( 41 ).
- each L-piece ( 41 ) is formed with a through hole ( 42 a ) for a mounting bolt ( 30 ) and a fitting hole ( 42 b ) 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 ( 43 a ) for a heat insulating material, it may have no charging hole ( 43 a ).
- the extensions ( 43 ) may comprise some having a charging hole ( 43 a ) and the others having no charging hole ( 43 a ).
- 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 FIG. 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.
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- 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)
Applications Claiming Priority (3)
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 |
JP2005-287496 | 2005-09-30 | ||
PCT/JP2006/319476 WO2007037373A1 (ja) | 2005-09-30 | 2006-09-29 | 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 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090241588A1 true US20090241588A1 (en) | 2009-10-01 |
Family
ID=37899794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/992,662 Abandoned US20090241588A1 (en) | 2005-09-30 | 2006-09-29 | Casing Structure for Refrigeration System and Method for Producing Casing Therefor |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090241588A1 (zh) |
EP (1) | EP1939557A4 (zh) |
JP (1) | JP4017002B2 (zh) |
CN (1) | CN101278161B (zh) |
AU (1) | AU2006295831A1 (zh) |
WO (1) | WO2007037373A1 (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100072210A1 (en) * | 2006-11-30 | 2010-03-25 | Makoto Ikemiya | Cap, multi-layered panel, and refrigerated container |
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 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101225629B1 (ko) * | 2010-04-26 | 2013-01-24 | 한화엘앤씨 주식회사 | 독립형 액화가스 탱크의 단열구조 및 그 형성방법 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US5486045A (en) * | 1993-11-01 | 1996-01-23 | Whirlpool Corporation | Shelf ladder reinforcement member for a refrigeration appliance |
US5655351A (en) * | 1996-04-23 | 1997-08-12 | Maytag Corporation | Reinforced refrigerator door assembly and method of assembling the same |
US6241441B1 (en) * | 1999-02-25 | 2001-06-05 | Abb Alstom Power (Schweiz) Ag | Securing fixture for a screw or a nut |
US20070068418A1 (en) * | 2005-09-23 | 2007-03-29 | Gunderson, Inc. | 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 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 (zh) * | 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 |
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 |
KR19980067370U (ko) * | 1997-05-26 | 1998-12-05 | 배순훈 | 냉장고의 부품고정구 |
-
2005
- 2005-09-30 JP JP2005287496A patent/JP4017002B2/ja active Active
-
2006
- 2006-09-29 CN CN200680036369.1A patent/CN101278161B/zh active Active
- 2006-09-29 WO PCT/JP2006/319476 patent/WO2007037373A1/ja active Application Filing
- 2006-09-29 US US11/992,662 patent/US20090241588A1/en not_active Abandoned
- 2006-09-29 EP EP06810874A patent/EP1939557A4/en not_active Withdrawn
- 2006-09-29 AU AU2006295831A patent/AU2006295831A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US5486045A (en) * | 1993-11-01 | 1996-01-23 | Whirlpool Corporation | Shelf ladder reinforcement member for a refrigeration appliance |
US5655351A (en) * | 1996-04-23 | 1997-08-12 | Maytag Corporation | Reinforced refrigerator door assembly and method of assembling the same |
US6241441B1 (en) * | 1999-02-25 | 2001-06-05 | Abb Alstom Power (Schweiz) Ag | Securing fixture for a screw or a nut |
US20070068418A1 (en) * | 2005-09-23 | 2007-03-29 | Gunderson, Inc. | 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 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100072210A1 (en) * | 2006-11-30 | 2010-03-25 | Makoto Ikemiya | Cap, multi-layered panel, and refrigerated container |
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 |
Also Published As
Publication number | Publication date |
---|---|
EP1939557A8 (en) | 2008-10-29 |
WO2007037373A1 (ja) | 2007-04-05 |
EP1939557A1 (en) | 2008-07-02 |
JP4017002B2 (ja) | 2007-12-05 |
CN101278161B (zh) | 2010-08-18 |
JP2007100982A (ja) | 2007-04-19 |
AU2006295831A1 (en) | 2007-04-05 |
CN101278161A (zh) | 2008-10-01 |
EP1939557A4 (en) | 2012-04-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DAIKIN INDUSTRIES, LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KITAMURA, YOSHINORI;ISHIHARA, HIROKI;REEL/FRAME:020777/0981 Effective date: 20070220 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |