RU2580675C2 - Cooling device for heat dissipating equipment - Google Patents

Abstract

FIELD: cooling.

SUBSTANCE: invention relates to cooling devices and can be used in electric power elements with high heat release. Disclosed cooling device includes housing 7, dielectric plate 2, mounting platform 3 with inner hollow shape at cooled element 1 (device), radial fins 4 with heat exchange intensifiers, fan 8 installed in upper part of housing. Between radial fins 4 are provided removable chamber 10 with liquid low-boiling coolant, wherein radial fins 4 are components of stationary 21 and removable fins 22 and each removable chamber 10 is provided with a viewing window 16, filler 11 and drain neck portion 14 with sealed screw cap 12, outlet tube 13 and side flanges 18 with holes for bolting. In said stationary radial fins 21 are integrally formed with mounting platform and on ends of each stationary fin, a groove for installing removable radial fins 22 and holes 18 for bolting stationary edges and two removable side flanges of adjacent chambers.

EFFECT: technical result is improving efficiency of device by means of heat exchange intensification, increasing device reliability.

3 cl, 11 dwg

Description

The invention relates to electrical engineering, in particular to cooling devices for semiconductor devices, and can be used in power electrical elements, as well as electric power elements with high heat dissipation.

The well-known "Cooler for semiconductor devices" (Klimov V.L., USSR AS No. 983838, IPC H01L 23/36, Н05К 7/20, bull. No. 47 dated 12/23/82), containing a radiator with vertical hollow cylindrical fins between which there are closed chambers filled with liquid low-boiling cooler.

The disadvantages of this device are the poor heat dissipation of closed chambers, as the constructive implementation of the device does not provide its full functionality in the process of evaporation, condensation and return of liquid condensate back to the chamber cavity, as well as the lack of the possibility of operational control of the required level of liquid cooler in each individual closed chamber; lack of the possibility of refueling a liquid cooler (if necessary); the inability to drain the liquid cooler (for example, during repair or when replacing with another type of liquid cooler or mixtures thereof); the inability to replace one defective closed camera with a working (or new) one or replace several (or all) closed cameras; lack of reliable cooling at various tilts and turns of the entire system, which generally reduces the efficiency and reliability of the cooling device.

The closest technical solution and taken as a prototype is the “Cooling device for elements of fuel equipment (Kochenkov A.G., Lopatin A.A., Schelchkov A.V. et al.: RF patent for invention №2334378, IPC Н05Л 7/20 , BI No. 26 of 09/20/2008), comprising a housing, a plateau-dielectric plate, an installation pad with a cooled device, radial ribs with heat transfer intensifiers made in the form of bulges on one side and holes on the other, an annular deflector mounted on the ribs between case and board, fan, mouth tained in the upper housing part.

The disadvantages of this device are the low cooling efficiency due to the structural limitations of the functional capabilities inherent in the device, namely the absence of closed chambers with a liquid low boiling cooler between the ribs; the lack of structurally possible cooling of the nomenclature of elements with high heat dissipation (for example, different in size, in shape or immediately, and both); the lack of the ability to change the ribs (for example, if it breaks); insufficient rib efficiency due to the structural presence of only bulges on one side of it and only holes on the other side, which reduces the surface intensification of heat transfer, and in general the efficiency and reliability of the device.

The object of the invention is to increase the efficiency of the device by intensifying heat transfer and high-quality removal of steam and its condensate through radial ribs and heat pipes of removable cameras by expanding the functionality and increasing the reliability of the device.

The technical result of the invention is to increase the efficiency of the device by intensifying heat transfer by expanding the functionality and increasing the reliability of the device.

The technical result is achieved by the fact that in the cooling device of the elements of the heat-generating electric equipment, comprising a housing, a dielectric plate, an installation pad with an internal hollow shape for the cooled element, radial ribs with heat transfer intensifiers, made in the form of bulges on one side and holes on the other, an annular deflector, mounted on the ribs between the housing and the dielectric plate, a fan installed in the upper part of the housing, according to which between the radial ribs are installed removable chambers with a liquid low-boiling cooler with the possibility of organizing the process of boiling, evaporation, condensation and return of liquid condensate back to the chamber cavity, while the radial ribs are made up of stationary and removable ribs, and each removable chamber has a structurally inclined upper wall in the form of a conical extension and equipped with a visualization window with a horizontal dashed line for controlling the level of filling with a liquid low-boiling cooler, a filler and a drain neck with sealed screw caps , a discharge tube and side flanges with holes for bolting, while the radial stationary ribs are made integral with the installation platform, and at the ends of each stationary rib there is a groove for installing a radial removable rib, and holes for bolting the removable rib, as well as two side flanges neighboring removable cameras.

On each radial removable rib, holes and bulges are made on both sides.

The installation site with radial stationary and removable ribs is made of copper or copper alloys.

The scientific novelty of the proposed device is to increase the efficiency of the device by intensifying heat transfer due to:

1) the presence of removable cameras with visualization windows, with inclined upper walls, with outlet tubes;

2) the presence of both holes and bulges on both sides of each radial removable rib;

3) design features of the removable chamber, which allows to intensify the heat sink from the cooled element by creating optimal conditions for boiling, vaporization and condensation of the used coolant;

4) expanding the functionality of the device for cooling heated removable parts of various shapes and sizes;

5) the ability to tilt at various angles and rotate the entire device together with the cooled element;

6) increase the reliability, resource and maintainability of the entire device due to the presence of composite, removable and replaceable parts.

To clarify the technical nature, consider the drawings:

FIG. 1 - general view of the device - top view (without fan);

FIG. 2 is a side view of the device in cross section (A-A);

FIG. 3 - removable chamber with a low-boiling liquid cooler - side view (from the outside of the side flange);

FIG. 4 - removable chamber with a low-boiling liquid cooler - view from the side of the inner concave side wall;

FIG. 5 - removable chamber with a low-boiling liquid cooler - view from the side of the outer convex side wall;

FIG. 6 - installation site with radial stationary ribs - top view (the inner part is in the form of a circle);

FIG. 7 - removable rib - top view;

FIG. 8 - removable rib - side view;

where 1 is the cooled element;

2 - dielectric plate;

3 - installation site with radial stationary cooling fins;

4 - radial composite rib;

5 - hole (shown in the example of a horizontal section of one of the removable ribs 22 shown in Fig. 1);

6 - convexity (shown by the example of a horizontal section of one removable rib 22 shown in Fig. 1);

7 - case;

8 - fan;

9 - annular deflector;

10 - removable camera;

11 - filler neck;

12 - screw tight cover of a jellied mouth;

13 - outlet pipe;

14 - a drain mouth;

15 - screw tight cover of a drain mouth;

16 - visualization window;

17 - side flange of the removable camera;

18 - hole for bolting the side flange of the removable chamber and the removable rib to the stationary rib;

19 - inner concave side wall of the removable camera;

20 - the outer convex side wall of the removable camera;

21 - stationary radial rib;

22 - radial removable rib.

Before starting the operation of the entire device, it must be assembled, secured and installed on the cooled element 1 (see Fig. 1, 2) before it starts to heat up. During assembly, it is necessary to install two adjacent removable chambers 10 to the left and right of the stationary rib 21, and to install the radial removable rib 22 in the groove of the radial stationary rib 21, then tighten all four parts tightly with bolts and nuts through the holes 18 (see Fig. 1-8 ) Further assembly must be carried out in the same sequence. When fully assembled, the structure shown in FIG. 1, which provides tight contact between the contacting surfaces of stationary and removable parts. The assembled structure can be installed on the cooled element 1 (see Fig. 1).

Next, it is necessary to refuel the removable chambers 10 (see Fig. 1, 3-5) with a liquid low-boiling cooler. Refueling is carried out through the filler neck 11 (see Fig. 1, 3, 4) to the level shown on the visualization window 16 (see Fig. 5) in the form of a horizontal dashed line. After refueling the chambers 10 (see Figs. 1, 3-5), tightness is ensured by tightening the screw caps 12, 15 together with the discharge pipes 13 on the filler 11 and drain 14 necks, respectively (see Fig. 1-5). Refueling can be carried out both before installing the entire device on the cooled element 1, and after (see Fig. 1, 2). After refueling all the removable cameras, it is necessary to carry out a general control of their tightness - by tilting the entire system to various angles, turning and holding in each state for several minutes. The tightness control can be carried out before and after the installation of the device on the cooled element 1 - depending on the design of the entire object (engine, device, technology, etc.), which includes the cooled element 1 (see Fig. 1).

Consider the operation of the device in statics, i.e. before heating the cooled element 1 (see Fig. 1). In this mode, all parts of the device, including the cooled element and coolant in removable chambers, are at a temperature equal to the ambient temperature. Pressure in removable cameras is normal. All contacting parts fit snugly together. The fan 8 (see. Fig. 2) is in a stationary (off) state, so the movement of the external cooling air does not occur.

Consider the operation of the device in dynamics. In this mode, the cooled element 1 will begin to heat up (see Fig. 1, 2). Heat will be transmitted in all directions. The installation site 3 with the radial stationary fins 21, the bodies of the removable chambers 10 with a liquid low boiling cooler, the radial removable fins 22 will be heated (see Figs. 1, 2). These parts will begin work on the removal of heat from the cooled element 1 (see Fig. 1, 2). Simultaneously with these processes, fan 8 should be turned on (see Fig. 2), which should provide additional intensification of cooling of the entire device by forced convection of ambient air, pumping it from the bottom up through the annular deflector 9, washing all heated outer open walls of the radial removable ribs 22 (see FIG. 1, 2, 7, 8), the upper walls of the removable chambers 10 (see FIG. 1), the outer walls 20 of the removable chambers 10 (see FIG. 5) and side flanges 17 (see FIG. 5), outlet pipes 13 with filler 11 (see Fig. 4) and drain 14 (see Fig. 5) throat ins sealed with screw caps 12, 15 (see. FIGS. 4, 5). At high heat flux densities, it is possible to boil coolant in removable chambers 10 (see Figs. 1, 3-5). In this case, vaporization will occur with some increase in pressure. The steam will begin to move through the filler neck 11 (see Fig. 3, 4) upstream of the discharge pipe 13 (see Fig. 1, 3-5), in which the condensation process will take place, as well as the condensate dropping back into the removable chamber 10 (see Figs. 1, 3, 4) through the drain neck 14 (see Fig. 5). The presence of the discharge tube 13 (see. Fig. 1, 3-5) will intensify the process of heat removal from the heated inner walls 19 of the removable chambers 10 (see. Fig. 4). The presence of holes and bulges on both sides of each radial removable rib will significantly intensify the heat transfer from their heated surface to air under conditions of natural air convection (with the fan turned off), and in conditions of forced air convection (with the fan turned on) this intensity will increase even more. The presence of an inclined upper wall of the removable chamber 10 and the discharge tube 13 (see Figs. 1, 3-5) allows for heat removal at various tilt angles and rotations of the entire device (see Fig. 2).

The advantage of the claimed invention in comparison with the known analogues due to design features, namely:

1) removable chambers with a liquid low-boiling cooler are installed between the radial ribs with the possibility of organizing the process of boiling, evaporation, condensation and return of liquid condensate back to the chamber cavity;

2) each removable camera is equipped with a visualization window with a horizontal dashed line for controlling the level of filling with a liquid low-boiling cooler, a filler and a drain neck with tight screw caps, a discharge tube and side flanges with holes for bolting;

3) each removable chamber structurally has an inclined upper wall in the form of a conical extension;

4) radial ribs are made of composite of stationary and removable ribs;

5) the radial stationary ribs are made integral with the installation platform and at the ends of each stationary rib there is a groove for installing the radial removable ribs and holes for bolting the removable ribs, as well as two side flanges of adjacent removable chambers;

6) both holes and bulges are made on each side of the radial removable rib;

7) the installation site with radial stationary and removable ribs is made of copper or copper alloys.

All this will make it possible to obtain an effective device by increasing heat transfer by expanding the functionality and increasing reliability (availability, resource), as well as the economy of not only cooled elements with high heat generation, but also of new technical systems in general, which include these cooled elements.

Claims (3)

1. A cooling device for elements of a heat-generating electric equipment, comprising a housing, a dielectric plate, an installation pad with an internal hollow shape for the cooled element, radial ribs with heat transfer intensifiers made in the form of bulges on one side and holes on the other, an annular deflector mounted on the ribs between the housing and a dielectric plate, a fan installed in the upper part of the housing, characterized in that between the radial ribs there are removable chambers with liquid low-boiling lacquer with the possibility of organizing the process of boiling, evaporation, condensation and return of liquid condensate back to the cavity of the chamber, while the radial ribs are made up of stationary and removable ribs, and each removable chamber is structurally inclined upper wall in the form of a conical extension and is equipped with a visualization window with horizontal dashed line for controlling the level of filling with a liquid low-boiling cooler, filler and drain mouths with sealed screw caps, outlet pipe and side flanges with holes for bolted connection, wherein the radial ribs are integrally fixed to the mounting platform and at the ends of each stationary fin is configured for setting a radial groove removable ribs and holes for bolting the removable rib and two side flanges of adjacent chambers removable. 2. The device according to p. 1, characterized in that on each radial removable rib is made on both sides of the hole, and the bulge. 3. The device according to p. 1, characterized in that the installation site with radial stationary and removable ribs is made of copper or copper alloys.

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