# US 7,612,664 B2 · Refrigerated container > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,612,664 B2 - Document ID: US7612664B2 - Status: Granted - Kind: B2 - Application number: 11/623,152 - Filed: 2007-01-15 - Published: 2007-08-23 - Granted: 2009-11-03 - Earliest claimed: 2006-01-16 - Assignees: Qingdao CIMC Special Reefer Co., Ltd. - Inventors: Tian Hua Huang; Guohao Huang; Hu Liang; Jim Sun - Web page: https://patentgrep.com/patent/US7612664B2 ## CPC - F25D 29/008: {Alarm devices} - B65D 90/008: {Doors for containers, e.g. ISO-containers (locking E05B83/12)} - B65D 90/022: {Laminated structures (B65D90/029 takes precedence)} - B65D 90/22: Safety features - G08B 13/06: by tampering with fastening - F25D 29/003: {for movable devices} - F25D 2400/40: Refrigerating devices characterised by electrical wiring - F25D 2700/02: Sensors detecting door opening - Y10T 70/5004: For antitheft signaling device on protected article - Y10T 70/7853: Tubular - F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B) - 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 - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A refrigerated container comprising a door composed of a first and a second door panels and a security device is disclosed. The security device includes a detection plate fixed to an inner side of the first door panel which has a free end extending towards the second door panel; a displacement sensor fixed to an inner side of the second door panel to cooperate with the free end of the detection plate; a monitoring module; and an antenna. Said displacement sensor, monitoring module and antenna are separately arranged in the door, and said monitoring module is arranged within a heat insulating layer in the first door panel or the second door panel, and said antenna is provided at an outer side of the first door panel or the second door panel. ## Claims ### Claim 1 A refrigerated container, comprising a security device and a door composed of a first door panel and a second door panel, said security device including: a detection plate having a first end fixed to an inner side structure of the first door panel, and a second opposite end as a free end extending towards the second door panel and being positioned behind an inner side structure of the second door panel when the door is closed; a displacement sensor fixed to the inner side structure of the second door panel and positioned adjacent to the free end of the detection plate so as to cooperate with the free end of the detection plate and to thus detect a relative displacement between the two door panels; a monitoring module electrically connected to the displacement sensor to receive and process outputs from the displacement sensor; and an antenna electrically connected to the monitoring module to receive and emit outputs from the monitoring module; wherein said displacement sensor, monitoring module and antenna are separately arranged in the door, and said monitoring module is arranged within a heat insulating layer in the first door panel or the second door panel, and said antenna is provided at an outer side of the first door panel or the second door panel. ### Claim 2 (depends on 1) The refrigerated container as claimed in claim 1, wherein in case of arranging on the same door panel, said displacement sensor, monitoring module and antenna are connected with each other by means of electrical wires or cables embedded into said heat insulating layer of said the same door panel. ### Claim 3 (depends on 1) The refrigerated container as claimed in claim 1, wherein said displacement sensor is a travel switch, said inner side structure of the second door panel comprises an inner lining, and the travel switch is fixed to the inner lining; and a contact pin of the travel switch protrudes out of the inner lining, and said free end of the detection plate is configured to press against the contact pin of the travel switch when the door is closed and release the contact pin of the travel switch when the door is opened so as to switch states of the travel switch. ### Claim 4 (depends on 1) The refrigerated container as claimed in claim 1, wherein said displacement sensor is a Hall sensor, said inner side structure of the second door panel comprises an inner lining, and the Hall sensor is fixed to the inner lining; and said free end of the detection plate includes magnetic conductive materials configured to face the Hall sensor when the door is closed. ### Claim 5 (depends on 1) The refrigerated container as claimed in claim 1, wherein said displacement sensor is a Hall sensor, said inner side structure of the second door panel comprises an inner lining, and the Hall sensor is fixed to the inner lining; and said free end of the detection plate includes a magnetic member, and said magnetic member is fixed to a portion of said detection plate which faces the Hall sensor when the door is closed. ### Claim 6 (depends on 1) The refrigerated container as claimed in claim 1, wherein said displacement sensor is a proximity switch, and said inner side structure of the second door panel comprises an inner lining and a U-shaped member fixed to the inner lining; and the proximity switch is fixed to one of two opposite side walls of the U-shaped member, and a magnetic member opposite to the proximity switch is fixed to the other one of the two opposite side walls of the U-shaped member; and said free end of the detection plate includes a bent portion which is inserted into a gap between the two opposite side walls of the U-shaped member and prevents magnetic lines of the magnetic member from reaching the proximity switch when the door is closed. ### Claim 7 (depends on 6) The refrigerated container as claimed in claim 6, wherein said proximity switch is a normally closed type or a normally open type of reed switch. ### Claim 8 (depends on 6) The refrigerated container as claimed in claim 6, wherein said proximity switch includes two reed switches electrically connected in series and arranged to be substantially in parallel with the inner lining and to be spaced apart from each other; and one of said two reed switches near an opening of said U-shaped member is a normally open type, the other one away from the opening of said U-shaped member is a normally closed type. ### Claim 9 (depends on 1) The refrigerated container of as claimed in claim 1, further comprising a reinforcer of heat-insulating materials arranged within the first door panel and abutting against an inner lining of the first door panel, said detection plate being fixed to the reinforcer of heat-insulating materials. ### Claim 10 (depends on 2) The refrigerated container of as claimed in claim 2, further comprising a reinforcer of heat-insulating materials arranged within the first door panel and abutting against an inner lining of the first door panel, said detection plate being fixed to the reinforcer of heat-insulating materials. ### Claim 11 (depends on 3) The refrigerated container of as claimed in claim 3, further comprising a reinforcer of heat-insulating materials arranged within the first door panel and abutting against an inner lining of the first door panel, said detection plate being fixed to the reinforcer of heat-insulating materials. ### Claim 12 (depends on 4) The refrigerated container of as claimed in claim 4, further comprising a reinforcer of heat-insulating materials arranged within the first door panel and abutting against an inner lining of the first door panel, said detection plate being fixed to the reinforcer of heat-insulating materials. ### Claim 13 (depends on 5) The refrigerated container of as claimed in claim 5, further comprising a reinforcer of heat-insulating materials arranged within the first door panel and abutting against an inner lining of the first door panel, said detection plate being fixed to the reinforcer of heat-insulating materials. ### Claim 14 (depends on 6) The refrigerated container of as claimed in claim 6, further comprising a reinforcer of heat-insulating materials arranged within the first door panel and abutting against an inner lining of the first door panel, said detection plate being fixed to the reinforcer of heat-insulating materials. ### Claim 15 (depends on 7) The refrigerated container of as claimed in claim 7, further comprising a reinforcer of heat-insulating materials arranged within the first door panel and abutting against an inner lining of the first door panel, said detection plate being fixed to the reinforcer of heat-insulating materials. ### Claim 16 (depends on 8) The refrigerated container of as claimed in claim 8, further comprising a reinforcer of heat-insulating materials arranged within the first door panel and abutting against an inner lining of the first door panel, said detection plate being fixed to the reinforcer of heat-insulating materials. ### Claim 17 (depends on 1) The refrigerated container as claimed in claim 1, wherein said antenna is arranged within an anti-collision block mounted on a pivot hinge of the first door panel or the second door panel.