CN205071597U - Enhancing heat emission liquid cooling radiator - Google Patents

Abstract

The utility model discloses a heat dissipation liquid-cooled radiator, which aims to provide a liquid-cooled radiator which can effectively reduce the flow resistance and increase the heat dissipation per unit volume of the radiator. It includes a sealed working chamber composed of a bottom plate and an upper cover. The bottom plate is an evaporation chamber; there are multiple heat dissipation units, multiple rib columns and partitions parallel to the bottom plate in the working chamber. The first flow channel, the second flow channel is formed between the partition plate and the bottom plate, the first flow channel communicates with the second flow channel to form a coolant flow channel, and there is a liquid inlet on the upper cover opposite to the first flow channel, opposite to the second flow channel There is a liquid outlet on the upper cover; each heat dissipation unit is composed of a connected adiabatic chamber and a condensation chamber, the adiabatic chamber is located between the partition and the bottom plate, and the condensation chamber is located above the partition; the lower end of the adiabatic chamber communicates with the evaporation chamber; the bottom plate There are multiple rib columns that pass through the bulkhead. The heat sink can effectively maintain the temperature of the cooled device within a safe range, and realize the miniaturization of the heat sink.

Description

An enhanced heat dissipation liquid cooling radiator

technical field

The utility model relates to the technical field of thermal energy engineering heat dissipation, in particular to a liquid cooling heat dissipation device used for heat dissipation of high heat flux density devices.

Background technique

With the increasing integration of electronic components, the heat dissipation of single equipment and the whole machine of high heat flux devices in the fields of electronic product equipment, aerospace, energy and chemical industry has increased sharply, and the cooling problem of high heat flux devices has become a constraint for related fields. The biggest obstacle to a technological leap. The traditional heat dissipation method is mainly based on air cooling, and other heat dissipation methods include liquid cooling, heat pipe heat dissipation, semiconductor refrigeration, and micro refrigeration system cooling. Among them, air cooling and liquid cooling are the most common and cheap cooling methods for high heat flux devices. Air cooling is to remove the heat load generated by the object to be cooled through forced convection heat transfer by the fan, and the air cooling itself has certain limitations. When the heat flux density exceeds a certain value, the ordinary air cooling heat dissipation will reach the limit. Compared with the air-cooled radiator, the liquid-cooled radiator mainly drives the fluid to take away the heat from the surface of the heating element through the circulation pump. The liquid-cooled radiator has the advantages of low noise, low thermal resistance, and small impact on the ambient temperature. Traditional liquid cooling heat dissipation is mainly through processing a large number of heat-conducting ribs with different shapes on the bottom plate of the evaporator, which not only increases the flow resistance of the liquid and the volume of the radiator itself, but also increases the power consumption of the circulating pump, and heat transfer The effect is not good, and hot spots are prone to appear on the surface of heating components, which limits the further application of liquid cooling radiators.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a liquid-cooled radiator which can effectively reduce the flow resistance and increase the heat dissipation per unit volume of the radiator.

The technical scheme adopted for realizing the purpose of this utility model is:

An enhanced heat dissipation liquid cooling radiator, including a sealed working chamber composed of a bottom plate and an upper cover, the inside of the bottom plate is an evaporation chamber; a plurality of heat dissipation units, a plurality of rib columns and the A partition parallel to the bottom plate, a first flow channel is formed between the partition plate and the top inner wall of the upper cover, a second flow channel is formed between the partition plate and the bottom plate, and the first flow channel communicates with the second flow channel to form Coolant flow channel, the upper cover opposite to the first flow channel is provided with a liquid inlet, and the upper cover opposite to the second flow channel is provided with a liquid outlet; each of the heat dissipation units is connected by The heat insulation chamber and the condensation chamber are composed, the heat insulation chamber is located between the partition plate and the bottom plate, the condensation chamber is located on the top of the partition plate; the lower end of the heat insulation chamber communicates with the evaporation chamber in the bottom plate; the A plurality of rib columns passing through the partition are installed on the bottom plate; the evaporation chamber, the heat insulation chamber and the condensation chamber are filled with heat transfer working medium.

A plurality of condensation sub-chambers are arranged at the end of the condensation chamber, and the plurality of condensation sub-chambers are arranged radially from the center of the condensation chamber.

The heat transfer medium filled in the evaporation chamber, the heat insulation chamber and the condensation chamber is water, liquid ammonia, acetone, ethanol or Freon refrigerant.

The upper cover and the bottom plate are processed by copper or stainless steel.

The height of the evaporation chamber in the bottom plate is 0.5-5mm.

The utility model has the following beneficial effects:

1. Through the design of the heat dissipation unit, the liquid-cooled radiator of the present utility model greatly improves the efficiency of phase change heat transfer, and the heat dissipation per unit volume is greatly increased, which can effectively reduce the number of heat-conducting ribs and reduce the circulation of cooling water flow Flow resistance; for applications with strict heat dissipation space requirements, the volume of the liquid cooling radiator itself can be greatly reduced under the same heat dissipation conditions. It can be applied to places with higher heat load heat dissipation requirements, or applications with strict heat dissipation volume requirements, and can effectively maintain the temperature of the cooled device within a safe range, which is of great importance to the miniaturization and high efficiency of radiators. important value.

2. In the liquid-cooled radiator of the present invention, a heat-insulating chamber coated with a heat-insulating material is provided between the second evaporation chamber and the condensation chamber, which has the effect of disturbing the cooling medium and enhancing heat transfer.

Description of drawings

Fig. 1 shows the appearance schematic diagram of the utility model liquid-cooled radiator;

Fig. 2 shows the top view of the utility model liquid cooling radiator;

Fig. 3 shows the A-A sectional view of the utility model liquid cooling radiator;

Fig. 4 shows the B-B sectional view among Fig. 3;

Fig. 5 shows a three-dimensional view of the liquid cooling radiator of the present invention.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

The schematic diagram of the enhanced heat dissipation liquid cooling radiator of the utility model is shown in Fig. 1-Fig. The bolts are fastened, and the working cavity constitutes a space for the circulating flow of the cooling medium. Inside the bottom plate 5 is an evaporation chamber 6 . The working chamber is provided with a plurality of cooling units, a plurality of rib columns 8 and a partition 9 parallel to the bottom plate 5, a first flow channel 11 is formed between the partition 9 and the top inner wall of the upper cover 2, A second flow channel 12 is formed between the partition plate 9 and the bottom plate 5, and the first flow channel 11 communicates with the second flow channel 12 to form a coolant flow channel. The upper cover 2 opposite to the first flow channel 11 A liquid inlet 3 is arranged on the upper cover, and a liquid outlet 4 is arranged on the upper cover 2 opposite to the second flow channel 12 . Each heat dissipation unit is composed of a connected heat insulating cavity 16 and a condensation cavity 7 , the heat insulating cavity 16 is located between the partition plate 9 and the bottom plate 5 , and the condensation cavity 7 is located on the upper part of the partition plate 9 . The lower end of the heat insulating chamber 16 communicates with the evaporation chamber 6 in the bottom plate 5 . A plurality of ribs 8 passing through the partition 9 are installed on the bottom plate 5 . The evaporation chamber 6 , the heat insulation chamber 16 and the condensation chamber 7 are filled with a heat transfer medium 14 .

In order to enhance the heat dissipation effect, a plurality of condensation sub-chambers 1 are arranged at the end of the condensation chamber 7 , and the plurality of condensation sub-chambers 1 are arranged radially from the center of the condensation chamber 7 .

The heat transfer medium 14 filled in the evaporating chamber 6 , the adiabatic chamber 16 and the condensing chamber 7 is water, liquid ammonia, acetone, ethanol or Freon refrigerant.

In this embodiment, the upper cover 2 and the bottom plate 5 are made of copper, and 20 mutually independent heat dissipation units are distributed on the bottom plate 5, and each of the condensation chambers 7 has 6 equiangular distributions. The condensation sub-chamber 1 and the rib columns 8 are uniformly arranged on the bottom plate 5 in an arrangement of 9 rows and 5 columns in units of three. The height of the evaporation chamber 6 in the bottom plate 5 is 0.5-5mm.

In order to enhance the heat exchange effect, a partition plate 10 is arranged in the second flow channel 12, and a third flow channel 13 is separated from the second flow channel 12. The first flow channel 11, the second flow channel 12 and the third channel 13 communicate with each other, and the third channel 13 communicates with the liquid outlet 4 .

When the liquid-cooled radiator of the present utility model is in operation, the heat load applied to the heating surface 15 is absorbed by the heat transfer medium 14 in the bottom plate evaporation chamber 6, evaporates into steam, and rises into the condensation chamber 7 along the inner wall of the heat insulation chamber , the heat load is transferred from the bottom of the rib column 8 to the upper part at the same time. The liquid inlet 2 is connected with an external circulating pump, and the cooling water is forced to advance along the first flow channel 11, and in the first flow channel, the cooling water exchanges heat with the condensation sub-chamber 1 of the condensation chamber 7 and the rib column 8; After the heated cooling water encounters the inner wall of the upper cover 2, the flow direction is changed, and the water flow changes direction from the gap of the partition plate 9 and flows along the second flow channel 12, and the cooling water in the second flow channel 12 Perform heat exchange with the rib column 8; the cooling water after heat exchange leaves the liquid cooling radiator through the liquid outlet 4 to complete the cooling process. Since the efficiency of phase change heat transfer is much higher than that of heat conduction, most of the heat load applied to the bottom of the heating surface 15 will pass between the evaporation chamber on the bottom plate, the heat insulation chamber 16 and the condensation sub-chamber of the condensation chamber 7 Phase change heat transfer, the heat is transferred to the cooling water and taken away by the cooling water flowing through the working chamber. Compared with traditional liquid-cooled radiators, the heat dissipation per unit volume is greatly increased, which can effectively reduce the number of heat-conducting ribs 8 and reduce the circulation flow resistance of cooling water flow; for applications with strict requirements on heat dissipation space, this practical model The volume of the liquid cooling radiator can be greatly reduced under the condition of the same heat dissipation. The liquid-cooled radiator of the utility model can be applied to places with higher heat load heat dissipation requirements, or applications with strict heat dissipation volume requirements, and can effectively maintain the temperature of the cooled device within a safe range. The miniaturization and high efficiency of the device are of great value.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these Improvement and retouching should also be regarded as the protection scope of the present utility model.

Claims (5)

1. an enhance heat liquid cooling heat radiator, is characterized in that, comprises the working chamber of the sealing be made up of base plate and upper cover, is evaporation cavity in described base plate; Multiple heat-sink unit, multiple rib post and the dividing plate parallel with described base plate is provided with in described working chamber, first flow is formed between described dividing plate and described upper cover top inner wall, the second runner is formed between described dividing plate and base plate, described first flow and the second flow passage form cooling liquid flowing channel, relative with described first flow described on cover and be provided with liquid-inlet, relative with described second runner described on cover and be provided with liquid outlet; Each described heat-sink unit is made up of the insulation chambers be communicated with and condensation chamber, and described insulation chambers is between described dividing plate and base plate, and described condensation chamber is positioned at described dividing plate top; The lower end of described insulation chambers is communicated with the evaporation cavity in described base plate; Described base plate is provided with multiple rib post through described dividing plate; Heat-transfer working medium is filled with in described evaporation cavity, insulation chambers and described condensation chamber.

2. enhance heat liquid cooling heat radiator according to claim 1, is characterized in that, the end of described condensation chamber is provided with multiple condensation point chamber, and multiple described condensation point chamber becomes radial setting with described condensation chamber center.

3. enhance heat liquid cooling heat radiator according to claim 1 and 2, is characterized in that, the described heat-transfer working medium filled in described evaporation cavity, insulation chambers and described condensation chamber is water, liquefied ammonia, acetone, ethanol or freon refrigerant.

4. enhance heat liquid cooling heat radiator according to claim 3, is characterized in that, described upper cover and base plate are processed by copper or stainless steel material.

5. enhance heat liquid cooling heat radiator according to claim 3, is characterized in that, the height of the evaporation cavity in described base plate is 0.5-5mm.