IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0628927
(2005-06-07)
|
등록번호 |
US-7823409
(2010-11-22)
|
우선권정보 |
DK-2004 00889(2004-06-07) |
국제출원번호 |
PCT/DK2005/000376
(2005-06-07)
|
§371/§102 date |
20061222
(20061222)
|
국제공개번호 |
WO05/121666
(2005-12-22)
|
발명자
/ 주소 |
- Colding-Kristensen, Holger
- Hellström, Frank
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
5 |
초록
▼
A freezer housing for a freezer for cooling and/or freezing of products lying on a conveyor belt, and which are conveyed through a freezing zone for the freezing, where upper ejector plates are provided above the conveyor belt and lower ejector plates are provided below the conveyor belt for inflow
A freezer housing for a freezer for cooling and/or freezing of products lying on a conveyor belt, and which are conveyed through a freezing zone for the freezing, where upper ejector plates are provided above the conveyor belt and lower ejector plates are provided below the conveyor belt for inflow of air into the freezing zone while applying an impingement principle, where the ejector plates are provided with transverse air return ducts.
대표청구항
▼
The invention claimed is: 1. A freezer for cooling and/or freezing of products lying on a conveyor belt, and which are conveyed through a freezing zone for the freezing, where upper ejector plates are provided above the conveyor belt and lower ejector plates are provided below the conveyor belt for
The invention claimed is: 1. A freezer for cooling and/or freezing of products lying on a conveyor belt, and which are conveyed through a freezing zone for the freezing, where upper ejector plates are provided above the conveyor belt and lower ejector plates are provided below the conveyor belt for inflow of air into the freezing zone while applying an impingement principle, wherein each ejector plate comprises transverse return air ducts with orifices disposed in a plane of the ejector plates and facing the conveyor belt, and wherein the return air ducts are arranged so that return air, at least partly, is conducted transversely of a conveying direction of the conveyor belt through the freezing zone, and wherein each ejector plate comprises a hole pattern covering at least 70% of areas over the conveyor belt on which the products are placed, and wherein the return air ducts cover up to 30% of the areas over the conveyor belt on which the products are placed and wherein the return air ducts are arranged for conducting the return air transversely of a conveying direction of the conveyor belt in the areas in an immediate vicinity of the conveyor belt. 2. The freezer according to claim 1, characterized in that the return air ducts are triangular, four-edged, pentagonal, or semi-circular. 3. The freezer according to claim 1, characterized in that the return air ducts are largely triangular and are oriented with a corner towards the conveyor belt, that each corner is cut off so that no acute angles between adjacent wall parts are formed, and that the return air ducts are connected with the ejector plates via short wall parts which are largely perpendicular to the plane of the ejector plates. 4. The freezer according to claim 1, characterized in that the freezer is designed for injecting a major part of the injection air through the ejector plates at one side of the conveyor belt, and that a large number of return air ducts are provided on the ejector plates at the opposite side. 5. The freezer according to claim 1, characterized in that the return air ducts in the upper ejector plates are displaced in relation to the return air ducts in the lower ejector plates. 6. The freezer according to claim 1, characterized in that the return air ducts have increasing cross-section in direction of the airflow for establishing a largely uniform airspeed across the length of the return air ducts. 7. The freezer according to claim 1, characterized in that the freezer is configured to operate with airspeeds up to 40 m/s. 8. The freezer according to claim 1, characterized in that the freezer includes a heat exchanger/evaporator which is disposed at a position immediately under the conveyor belt. 9. The freezer according to claim 1, in combination with a closed, thermally insulated housing. 10. The freezer combined with the closed, thermally insulated housing according to claim 9, characterized in that the housing is configured to keep a temperature that may be down to minus 40° C., or below. 11. The freezer combined with the closed, thermally insulated housing according to claim 9, characterized in that the freezer includes a heat exchanger/evaporator, and that the freezing housing includes a plate arrangement that divides the housing into a pressurized zone between the evaporator, the heat exchangers and the injection side of the ejector plates, and a second zone with lower pressure where the air flows out from the return air ducts and flows to the inlet side of the heat exchanger/evaporator. 12. The freezer combined with the closed, thermally insulated housing according to claim 9, arrangement is suspended on vertical columns or a pivotably suspended support holder beam. 13. An ejector plate for a freezer for cooling and/or freezing of products lying on a conveyor belt, and which are conveyed through a freezing zone for the freezing, where upper ejector plates are provided above and below the conveyor belt for air inflow in the freezing zone by application of an impingement principle, wherein each ejector plate comprises transverse return air ducts with orifices disposed in a plane of the ejector plates and facing the conveyor belt, and wherein the return air ducts are arranged for conducting return air, at least partly, transversely of a conveying direction of the conveyor belt through the freezing zone, and wherein each ejector plate comprises a hole pattern covering at least 70% of areas over the conveyor belt on which the products are placed, and wherein the return air ducts cover up to 30% of the areas over the conveyor belt on which the products are placed and wherein the return air ducts are arranged for conducting return air transversely of the conveying direction of the conveyor belt in the areas in an immediate vicinity of the conveyor belt. 14. The ejector plate according to claim 13, characterized in that the return air ducts are largely triangular and are oriented with a corner towards the conveyor belt, that each corner is cut off so that no acute angles between adjacent wall parts are formed, and that the return air ducts are connected with the ejector plates via short wall parts which are largely perpendicular to the plane of the ejector plates. 15. The ejector plate according to claim 14, characterized in that the return air ducts have increasing cross-section in direction of the airflow for establishing a largely uniform airspeed over the length of the return air ducts.
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