[특허]Low temperature zoning formation system for holding freshness of food

Mayekawa Mfg. Co., Ltd.

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Low temperature zoning formation system for holding freshness of food

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A47F-003/04
미국특허분류(USC)	062/255; 062/257; 062/434
출원번호	US-0508056 (2003-03-18)
등록번호	US-7322204 (2008-01-29)
우선권정보	JP-2002-075993(2002-03-19)
국제출원번호	PCT/JP03/003281 (2003-03-18)
§371/§102 date	20050614 (20050614)
국제공개번호	WO03/078908 (2003-09-25)
발명자 / 주소	Hirao,Yasuhiro Hariu,Kazuo Nakagawa,Hiroyuki Nishida,Kousaku
출원인 / 주소	Mayekawa Mfg. Co., Ltd.
대리인 / 주소	Crowell & Moring LLP
인용정보	피인용 횟수 : 5 인용 특허 : 6

초록
▼

A low temperature zone forming system by convection type thermal stratification in which the low temperature zone separated from polluted outside air is formed on a movable or fixed table for handling commodities such as marine products while maintaining freshness thereof during the period from carrying-in in the whole sale market, during selling by auction, until shipment of the commodities from the market, comprising an upward-open case body (30) mounted on a chassis (30a), a separate brine chilling unit (30b), and a brine piping (30c), the upward-open case body (30) further comprising a roller conveyer (35) installed in the center part of the floor of the case body (30), cooling flat plates each of which is installed adjacent to the roller conveyer (35), and cooling flat plates are installed on the inside faces of both laterally longitudinal side walls.

대표
청구항
▼

The invention claimed is: 1. A low temperature zone forming system including an upward-open case body for displaying commodities, the case body confining a space surrounded by a floor face and four side walls, to be used for maintaining freshness of fresh marine products in a wholesale market, wherein a thermally stratified low temperature zone having temperature distribution in a vertical direction is formed above said floor face, and further wherein said floor face constitutes a cooling heat exchanger having heat transfer faces on both sides thereof, one of the heat transfer faces forming a cooling floor face and the other of the heat transfer faces forming a heat transfer face to perform heat exchange in a cold air producing chamber formed in a rear face side of the floor face, wherein warm air in a warm air zone in an upside opening region of said case body is introduced into said cold air producing chamber to be cooled therein, and cold air produced in the chamber is introduced into the low temperature zone formed above said one of the heat transfer faces to form a new cold air stratified zone. 2. A low temperature zone forming system including an upward-open case body for displaying commodities, the case body confining a space surrounded by a floor face and four side walls, to be used for maintaining freshness of fresh marine products in a wholesale market, wherein a thermally stratified low temperature zone having temperature distribution in a vertical direction is formed above said floor face, and cold air is introduced in a lower part of said low temperature zone as necessary at low velocity in an ordinary operation and the introduction of cold air is switched to a forced introduction to form a stratified low temperature zone having a required temperature distribution in a vertical direction, and further wherein said floor face constitutes a heat exchanger comprising a cooling flat plate having heat transfer faces on both sides thereof, one of the heat transfer faces forming a cooling floor face and the other of the heat transfer faces forming a heat transfer face to perform heat exchange in a cold air producing chamber formed in a rear face side of the floor face, wherein warm air in a warm air zone in an upside opening region of said case body is introduced into said cold air producing chamber to be cooled therein, and cold air produced in the chamber is introduced into the low temperature zone formed above said one of the heat transfer faces to form a new cold air stratified zone. 3. The low temperature zone forming system according to claim 2, wherein a separate cooling panel is attached to the rear face of said floor face, the cold air produced by means of the panel is forced into the low temperature zone above the floor face to form a cold air stratified zone of required temperature. 4. The low temperature zone forming system according to claim 1, wherein cold air is introduced in a lower part of said low temperature zone as necessary. 5. The low temperature zone forming system according to claim 4, wherein said cold air is introduced at low velocity in an ordinary operation and the introduction of cold air is switched to a forced introduction to form a stratified low temperature zone having a required temperature distribution in a vertical direction. 6. The low temperature zone forming system according to claim 1, wherein said floor face is a one-side-cooling flat plate having a flat heat transfer face on one side thereof, and the formation of the thermal stratification is possible in a short time period by concentrating cooling capacity to said heat transfer face. 7. The low temperature zone forming system according to claim 1, wherein an inside face of said four side walls and said floor face are composed to be cooling flat plates, so that a convection type cold air stratified zone is formed by the low temperature zone formed by the convection between a descending cold air current produced due to a cooling of air by the cooling plates of the four side walls and the cold air zone produced due to the cooling of air by the cooling plates of the floor and a hot air region formed above said low temperature zone. 8. The low temperature zone forming system according to claim 7, wherein cooling flat plates are provided on inside faces of laterally longitudinal walls among the four side walls. 9. A low temperature zone forming system including an upward-open case body for displaying commodities, the case body confining a space surrounded by a floor face and four side walls, to be used for maintaining freshness of fresh marine products in a wholesale market, wherein a thermally stratified low temperature zone having temperature distribution in a vertical direction is formed above said floor face, and further wherein a transfer section consisting of a roller conveyer is installed on part of said floor face in a laterally longitudinal direction or in a crosswise direction, and a cooling flat plate or plates which can serve as chopping boards are provided in a position or positions other than the transfer section. 10. The low temperature zone forming system according to claim 9, wherein the roller conveyer is provided on said floor face in a laterally longitudinal direction. 11. The low temperature zone forming system according to claim 1, wherein said four side walls can be turned over outward or detached, and when storing commodities in the case body, the walls are recovered to an erect state with the walls closely contacted with the floor face to be able to again allow the formation of the low temperature zone. 12. The low temperature zone forming system according to claim 1, wherein the temperature of said low temperature zone can be controlled in a temperature range from storage temperature with ice to a temperature for maintaining a frozen state of marine products by adjusting a cooling temperature of the cooling heat exchanger or a cooling flat plate through controlling the temperature of a heat sink for cooling the cooling heat exchanger or the cooling flat plate. 13. The low temperature zone forming system according to claim 1, wherein current plates are provided at an opening for introducing cold air to the low temperature zone. 14. The low temperature zone forming system according to claim 1, wherein a cold air producing chamber which is a shallow passage formed under the cooling heat exchanger or cooling flat plate of which one of the heat transfer faces forms said floor face and the other heat transfer face forms a rear face of the floor, and said rear side heat transfer face is provided with concavities and convexities, fins, or is blast finished. 15. The low temperature zone forming system according to claim 1, wherein said cooling heat exchanger or cooling flat plate provided to said floor face or to both of said floor face and inside faces of the side walls are supplied with a brine cooled by a refrigerating machine which is housed in a space under the floor face of the upward-open case body or the brine cooled by a central refrigerating machine which is located outside the system by means of brine piping. 16. The low temperature zone forming system according to claim 1, wherein a shut-off valve is attached to a connector fixed to an end of each brine piping which is integrated in said cooling heat exchanger or cooling flat plates installed on said floor face or on both of the floor face and the inside faces of said side walls in order that a leakage of brine is prevented when detaching or attaching said cooling flat plates. 17. The low temperature zone forming system according to claim 1, wherein said upward-open case body is provided with a sunshade sheet to prevent sunlight streams into the low temperature zone. 18. The low temperature zone forming system according to claim 1, wherein said upward-open case body is provided with casters or the like at its foot parts, and a vertical position of the floor face of the case body is such that putting-on and-down of commodities is easily possible.

이 특허에 인용된 특허 (6)

이 특허를 인용한 특허 피인용횟수: 5

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Low temperature zoning formation system for holding freshness of food

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Low temperature zoning formation system for holding freshness of food

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