Patent Application
20230217627
This application is based upon and claims priority to Turkish Patent Application No. 2021/021953, filed on Dec. 30, 2021, the entire contents of which are incorporated herein by reference.
The invention relates to the cooling of electronic cards, namely it provides a cooling case to cool electronic cards in military electronics packaging efficiently.
Today in military electronics packaging printed circuit boards need to be fixed to a mechanics for cooling as well as meeting mechanical and electrical requirements. They shall be resistant against shock and vibration mechanically and required connectors shall be combine with one another electrically. Particularly, cooling of boards having very high heating by heat transmission method provides huge advantages in many platforms. The case where the boards are located can be more than one. However, if one or more than one of the boards have excessive heat load, all cooling architecture in the case may change.
In the current related art, the electronic board (PCB) is used together with a wedge mechanism and this structure, which is connected to each other outside, is mounted by sliding it into the case from the upper part. Because of space and interface resistance inside the wedge lock mechanisms used, higher thermal resistance occurs. In the related art, the biggest problem is that the thermal resistances are about 0.2° C./W in the filled mechanical place, and this resistance is 0.5° C./W in the wedge-lock surface. In this case heat is not equally distributed and parallel conveyed heat compound resistance varies between 0.143-0.2° C./W. In such case, when a heat load of 70 W is transferred from only one wall via wedge mechanism, at least temperature increase of minimum 10° C. occurs there from.
Upon investigation of the prior art, a document numbered US2012175094 is seen. This document relates to cooling systems adapted for use in cooling heat sources such as integrated circuit components, processors and memory modules in computer systems and particularly a cold plate embodied to provide efficient heat exchange. The structure disclosed under the document describes a conventional liquid cooling module. The liquid in this structure cools the heat source by entering finned structure inlet interface and exiting from another outlet interface.
In conclusion, developments have been made in embodiments used in cooling electronic boards and, therefore, new design/concept eliminating the above disadvantages and offering solutions to existing systems are needed.
The present invention relates to cooling case meeting the needs mentioned above, eliminating all disadvantages and providing some additional advantages.
The main purpose of the invention is to provide cooling of electronic boards used in military vehicles. For this purpose, a method to improve to provide other requirements when compared to any method of cooling with heat transmission known before. By this method a method to minimize thermal performance loss caused by wedge mechanism of a board having very high heat load is developed. With this method a slot is provided on board area of the case and the plate called cold plate and used to take heat from electronic member to case wall is put into case from outside. Wedge mechanism is fully removed. Edges of elongated plate are kept wide, and fins are added to increase cooling effectiveness and flange gaskets are added thereon to provide sealing and thus both fluid cooling case and air-cooling cases are provided with high, effectiveness, easy production and considerably advantage embodiment.
In order to achieve all of the advantages mentioned above and described in detail below, the present invention relates to cooling case providing cooling of electronic cards in military electronics packaging and located on electronic cards and characterized by;
The structural and characteristic features and all advantages of the invention will be understood better in the figures given below and the detailed description by reference to the figures. Therefore, the assessment should be made based on the figures and taking into account the detailed descriptions.
In order to make the embodiment and additional members being subject of the present invention as well as the advantages clearer for better understanding, it should be assessed with reference to the fallowing described figures.
In this detailed description, the preferred embodiments of the cooling case (1) being subject of this invention have been disclosed solely for the purpose of better understanding of the subject and described in a manner not causing any restrictive effect.
The invention is a cooling case (1) providing cooling case including a cold plate (3) of electronic cards in military electronics packaging and located on electronic cards and comprises
Cooling case (1) of the invention includes in the most general form, a cold plate (3) where electronic card is located. Cold plate (3) is mounted to cooling case (1) by passing it through cold plate opening (2) located on one side of cooling case (1). Connection of cold plate (3) to cooling case (1) is provided by primary connection members (8) which are preferably screw. An outer cover (4) is connected onto cold plate opening (2) to cut connection of cold plate (3) mounted into cooling case (1) with outer environment. Also connection of outer cover (4) to cooling case (1) is provided by secondary connection members (9) which are preferably screw.
Fins (7) are provided on side parts where cold plate (3) is connected to cooling case (1). Similarly, inner walls where cooling case (1) is connected to cold plate (3) are of finned form. Said fins (7) provide transmission of heat taken by cold plate (3) to fluid passing through cooling case (1). The areas where fins (7) are connected on cooling case (1) have areas containing air or fluid passing formed on cooling case (1). Thus fins (7) are enabled to take heat directly (without use of any connection part) from cold plate (3).
Secondary sealing members (6) are provided between cold plate (3) and cooling case (1) in order to provide sealing between cold plate (3) and cooling case (1). Also, primary sealing member (5) is provided between outer cover (4) and cooling case (1). Said primary sealing member (5) and secondary sealing members (6) are preferably gasket. Thus, a sealing structure is achieved in cases (1) run by both air cooling and fluid cooling and thermal loss is prevented.
With embodiment of invention cold plate (3) is on fins (7) and thus contact with direct fluid (air or fluid) is provided and a performance loss of 10 - 15° C. that might occur in a card having 100 W-120W heat load to occur in the related art is eliminated. Also, if it is desired to use said card at higher performance, fin (7) design of cold plate (3) is changed and thermal performance can be improved without need to change cooling case (1).
| Number | Date | Country | Kind |
|---|---|---|---|
| 2021/021953 | Dec 2021 | TR | national |
