| 摘要 |
<p>For controlling the coolant flow in cooling units in a plate freezer, a valve (6) is inserted that allow normal flow-through in one direction, but only limited flow-through in the opposite direction. The valve is designed with a valve chamber (12) in which is provided a movable valve body (20). In a first position of the valve body (20) (Fig. 2b), the valve body (20) only allows limited flow-through of coolant through a central hole (22). In a second position (Fig. 2a), where the fluid flow has changed to the opposite direction, the valve body (20) is pressed away from its valve seat (23). Due to the size of the valve chamber (12) and the use of legs (21) on the valve body (20), a substantially larger flow-through of coolant is allowed. <??>Applied to cooling units of a plate freezer, in the first position the valve acts as a flow resistance, meaning even distribution of coolant in a freezing stage for the cooling unit when coolant is to flow from a distribution chamber to the cooling unit. When the cooling unit (1) is to be defrosted, the coolant is sent the opposite way through the cooling unit (1) through the valve chamber (12) of the valve (6), whereby the valve opens up and allows a rapid flow-through of coolant and thereby a rapid and uniform defrosting of the cooling unit (1). <IMAGE></p> |
