| 摘要 |
A freezing plant consists of a row of plate freezers (1, 2, 3 and 4), a feeding conveyor (5) and a removing conveyor (6). Each of the plate freezers (1, 2, 3, 4) has a stack of freezing plates and means for stepwise lifting the stack in such a way that interspaces may be provided between the plates for filling and emptying the interspaces. Supporting means serve to support the at any time lowermost plate of the upper part of the stack at the upper limit of the interspace and releasable support means serve to support the at any time uppermost plate of the lowermost part of the stack at the lower limit of the interspace. The disengageable and the releasable supporting means are adapted to release the stack for lowering the stack after positioning of the product to be frozen upon each freezing plate. Each plate freezer has means for applying pressure upon the plate stack after the filling and the lowering of the stack. Each plate freezer (1, 2, 3, 4) moreover, is adapted in such a way that the plates have a freezing period during at least a part of the time during which pressure is applied to the plate stack, and during this period freezing medium is fed to the freezing plates. After the freezing period a thawing loose period follows during which thawing loose medium is fed to the plates and after this period an inactive period follows for emptying and filling the plate freezer. The number of plate freezers in the series is equal to one plus the sum of the freezing period and the thawing loose period of a plate freezer divided by the inactive period of the plate freezer. A compact frozen product, a continuous feeding of the product to be frozen and a continuous removal of the frozen product is achieved. |
