COOLING ELEMENT
Cooling element, with multiple cooling disks (16, 17) arranged in an array to restrict flow interspaces for the air to be cooled. Cooling disks (16) extending to the inlet side for the air to be cooled, and shorter cooling disks (17) not extending to the inlet side, are arranged alternating order.
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The invention relates to a cooling element according to the introductory part of claim 1. More specifically, it relates to a cooling element with a number of cooling disks being assembled to provide restricted interspaces for air to be cooled.
BACKGROUNDWhen assembling cooling elements with disks or lamellas arranged in an air flow to be cooled, it is important to have an efficient exchange between air and metal. The distance between the cooling disks is adapted to the manufacturing, typically without optimization relative to the size.
For some purposes, the available space is restricted, requiring compact cooling elements.
OBJECTThe main object of the invention is to provide a cooling element having higher efficiency than corresponding prior art cooling elements.
THE INVENTIONThe invention is stated in claim 1. This design provides a substantial increase in cooling and lowering the temperature of air passing through such a cooling element. This is believed to be due to an increased degree of collision at the cooling dishes due to the stepwise constriction of the width of the air slots.
The claims 2-4 state particular favourable features of the invention. More details will be given in the following description of embodiments of the invention.
The invention is now described with reference to the drawings, wherein
In
Air molecules being cooled at the transfer from the wider to the narrower interspaces are believed to be getting an increased specific weight and thus have an increased fall velocity and simultaneously oscillate more slowly and create fewer collisions with the succeeding neighbouring molecules.
A reduction of the disk interspace to lower than ca. 2.5 millimetres will increase the risk of icing and clogging.
The cooling element 11 of the example has a vertical orientation of the interspaces, with a gravitational air flow. The cooling element according to the example can also be used in a forced flow cooling system with a fan. This provides more versatility.
The cooling element 11 according to the invention may be used for various cooling purposes, for technical uses and in housings and offices. It is suitable for cooling elements to be suspended over the goods to be cooled.
ModificationsIt is also possible to achieve corresponding advantages with other arrangements of stepwise restricted interspaces. Two or more short dishes can be used between each pair with full extension. Or multiple steps can be arranged, provided the narrowest interspaces are in the range 2.5 to 3 millimetre.
Claims
1. Cooling element, with multiple cooling disks (16, 17) arranged in an array to restrict flow interspaces for the air to be cooled, characterized in that cooling disks (16) extending to the inlet side for the air to be cooled, and shorter cooling disks (17) not extending to the inlet side, are arranged in alternating order.
2. Cooling element according to claim 1, characterized in that the shorter cooling disks (17) extend over about half the flow distance for the air through the cooling element.
3. Cooling element according to claim 1, characterized in that the distance between the cooling disks (16, 17) at the dense side of the cooling element (11) is 2.5 - 3 millimetres.
4. Cooling element according to claim 1, characterized in that from 3 to 4 different heights of disks are arranged, to provide stepwise narrowing interspaces.
Type: Application
Filed: Sep 18, 2007
Publication Date: Nov 12, 2009
Applicant: SPOT COOLER SYSTEMS AS (Meraaker)
Inventor: Jan Ragnar Stokke (Stjordal)
Application Number: 12/442,586