1. An immersed spray cooled heat exchanger, characterized in that: the cooling device comprises a base body (1) and a cooling liquid external circulation heat dissipation device, wherein a static pressure cavity (2) filled with cooling liquid and a working cavity (3) filled with the cooling liquid are arranged in the base body (1), and the static pressure cavity (2) is positioned above the working cavity (3);

a separation barrel (4) is fixed at the top end of the working cavity (3), the inner wall of the separation barrel (4) is enclosed to form a spray mixing cavity (301), a backflow cavity (302) is formed between the outer wall of the separation barrel (4) and the inner wall of the working cavity (3), a gap is reserved between the end part of the bottom end of the separation barrel (4) and the cavity bottom of the working cavity (3) to form an injection port (303), an internal circulation inlet (101) and an internal circulation outlet (102) are formed in the base body (1), the backflow cavity (302) is communicated with the static pressure cavity (2) through the internal circulation inlet (101), and the static pressure cavity (2) is communicated with the spray mixing cavity (301) through the internal circulation outlet (102);

a liquid inlet pipe (5) is fixed on the base body (1), the liquid inlet pipe (5) extends into the spraying mixing cavity (301), a plurality of nozzles (6) are fixed at the bottom end of the liquid inlet pipe (5), the nozzles (6) are communicated with the liquid inlet pipe (5), a heat dissipation area for mounting a heat source (7) is arranged at the cavity bottom of the working cavity (3), the heat source (7) is fixedly mounted in the heat dissipation area, and the nozzles (6) are located in the spraying mixing cavity (301) and above the heat source (7);

the cooling liquid external circulation heat dissipation device is used for circularly cooling liquid in the static pressure cavity (2) and the working cavity (3), the inlet end of the cooling liquid external circulation heat dissipation device is communicated with the static pressure cavity (2), and the outlet end of the cooling liquid external circulation heat dissipation device is communicated with the liquid inlet pipe (5).

2. A submerged spray cooled heat exchanger according to claim 1, wherein: the heat source (7) inclines towards the injection port (303) from top to bottom, and an included angle between the axis of the nozzle (6) and the upper surface of the heat source (7) is an acute angle.

3. A submerged spray cooled heat exchanger according to claim 2, wherein: the heat source (7) in the heat dissipation area is multiple.

4. A submerged spray cooled heat exchanger according to claim 2, wherein: the height of the topmost end of the heat source (7) in the heat dissipation area is lower than the height of the bottommost end of the separation cylinder (4).

5. A submerged spray cooled heat exchanger according to claim 1, wherein: the cooling liquid extrinsic cycle heat abstractor includes circulating pump (8), cooler (9) and stock solution container (10), pipeline and stock solution container (10) intercommunication are passed through in static pressure chamber (2), stock solution container (10) pass through pipeline and cooler (9) intercommunication, pipeline and circulating pump (8) intercommunication are passed through in cooler (9), circulating pump (8) pass through pipeline and feed liquor pipe (5) intercommunication.

6. The submerged spray cooled heat exchanger of claim 5, wherein: the cooler (9) is an air-cooled cooler, a tube cooler or a plate cooler.

7. The submerged spray cooled heat exchanger of claim 5, wherein: the circulating pump (8) is a piezoelectric pump.

Background

At present, the immersed liquid cooling heat dissipation scheme of the electronic chip adopting the fluorinated liquid is concerned, and the 3M company in the united states can provide various immersed cooling heat dissipation technical schemes of the data center based on the electronic fluorinated liquid.

The electronic fluorination liquid is an electrically insulated fluorination liquid used as a cooling medium, is a non-flammable insulating liquid, has the characteristics of wide working temperature range, easy maintenance and easy cleaning, and can be used as a substitute of the traditional cooling liquid (such as water, water glycol or oil).

The immersed liquid cooling heat dissipation refers to that a heat source is directly immersed in cooling liquid, and heat generated by the heat source is directly and efficiently transferred to the liquid, so that the requirements on active cooling components such as heat-conducting interface materials, radiators and fans are reduced. These improvements increase energy efficiency while allowing higher packing densities to be employed. The electronic chip cluster mainly has the following advantages by adopting immersion cooling: the cooling energy consumption is reduced; reducing the frequency of moving parts for maintenance and replacement; based on the efficient heat transfer characteristic of liquid, the design density of hardware can be improved; the operating temperature is maintained below the chip temperature limit, allowing for higher processor utilization; the element is dry and clean, and the maintenance is convenient; significantly reducing operating noise.

However, although the liquid cooling method of the immersion type of the electronic fluorinated liquid is adopted, the actual convection heat transfer coefficient of the heat exchange surface is still difficult to compare favorably with the spray cooling heat transfer technology because the flow velocity of the liquid coolant on the surface of the chip is difficult to greatly increase. At present, the heat transfer coefficient of spray cooling is ten times or even dozens of times higher than that of immersion liquid cooling.

In view of this, the present invention provides an immersion type spray cooling heat exchanger, which can effectively utilize the advantages of both.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to solve the defects in the prior art, an immersed spray cooling heat exchanger is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: an immersed spray cooling heat exchanger comprises a base body and a cooling liquid external circulation heat dissipation device, wherein a static pressure cavity filled with cooling liquid and a working cavity filled with cooling liquid are formed in the base body, and the static pressure cavity is positioned above the working cavity;

a separation barrel is fixed at the top end of the working cavity, the inner wall of the separation barrel is enclosed to form a spray mixing cavity, a backflow cavity is formed between the outer wall of the separation barrel and the inner wall of the working cavity, a gap is reserved between the end part of the bottom end of the separation barrel and the cavity bottom of the working cavity to form an injection port, an internal circulation inlet and an internal circulation outlet are arranged in the matrix, the backflow cavity is communicated with the static pressure cavity through the internal circulation inlet, and the static pressure cavity is communicated with the spray mixing cavity through the internal circulation outlet;

a liquid inlet pipe is fixed on the base body, the liquid inlet pipe extends into the spray mixing cavity, a plurality of nozzles are fixed at the bottom end of the liquid inlet pipe, the nozzles are communicated with the liquid inlet pipe, a heat dissipation area for mounting a heat source is arranged at the cavity bottom of the working cavity, the heat source is fixedly mounted in the heat dissipation area, and the nozzles are located in the spray mixing cavity and above the heat source;

the cooling liquid external circulation heat dissipation device is used for circularly cooling the cooling liquid in the static pressure cavity and the working cavity, the inlet end of the cooling liquid external circulation heat dissipation device is communicated with the static pressure cavity, and the outlet end of the cooling liquid external circulation heat dissipation device is communicated with the liquid inlet pipe.

Through nozzle blowout coolant liquid in this scheme, high-speed washing heat source surface carries out the heat transfer, and simultaneously, the high-speed flow that nozzle blowout coolant liquid produced can drive the coolant liquid mixing flow of spraying mixing intracavity, form the entrainment effect, on the one hand, promote the coolant liquid at the velocity of flow of coolant liquid on the heat source surface, improve heat exchange efficiency, on the other hand, make the coolant liquid at the spraying mixing chamber, draw the mouth, the inner loop entry, constitute the inside circulation flow between static pressure chamber and the inner loop export, promote the mutual intensive mixing of coolant liquid self, be favorable to the heat transfer between the coolant liquid, promote the coolant liquid ability of carrying the heat, heat exchange efficiency is high.

Furthermore, the heat source inclines towards the injection port from top to bottom, and an included angle between the axis of the nozzle and the upper surface of the heat source is an acute angle; thereby preventing collision and backflow and enabling the cooling liquid sprayed by the nozzle to flow to the injection port more easily.

Further, the heat source in the heat dissipation area is multiple.

Further, the height of the topmost end of the heat source in the heat dissipation area is lower than the height of the bottommost end of the separation cylinder; the heat sources can be all positioned in the area where the flow rate of the cooling liquid is high.

Further, the cooling liquid outer circulation heat dissipation device comprises a circulating pump, a cooler and a liquid storage container, the static pressure cavity is communicated with the liquid storage container through a pipeline, the liquid storage container is communicated with the cooler through a pipeline, the cooler is communicated with the circulating pump through a pipeline, and the circulating pump is communicated with the liquid inlet pipe through a pipeline.

Further, the cooler is an air-cooled cooler, a tube cooler or a plate cooler.

Further, the circulation pump is a piezoelectric pump.

The invention has the beneficial effects that: the immersed spray cooling heat exchanger disclosed by the invention adopts the design of the nozzle, the heat transfer coefficient of the immersed liquid cooling is greatly improved, the cooling liquid matrix circularly flows in the interior, the mutual sufficient mixing of the cooling liquids is promoted, the heat transfer between the cooling liquids is facilitated, the heat carrying capacity of the cooling liquid is improved, the heat exchange efficiency is high, and meanwhile, most of the cooling liquid is stored in the matrix, the contact with a pipeline is reduced, and the noise is reduced.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of an immersion spray cooled heat exchanger of the present invention.

In the figure: 1. a basal body, 101, an internal circulation inlet, 102 and an internal circulation outlet;

2. a static pressure chamber;

3. a working cavity 301, a spray mixing cavity 302, a reflux cavity 303 and an injection port;

4. a separating cylinder 5, a liquid inlet pipe 6, a nozzle 7 and a heat source;

8. a circulating pump 9, a cooler 10 and a liquid storage container.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention, and directions and references (e.g., upper, lower, left, right, etc.) may be used only to help the description of the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

Example 1

As shown in fig. 1, an immersed spray cooling heat exchanger comprises a base body 1 and a cooling liquid external circulation heat dissipation device, wherein a static pressure cavity 2 filled with cooling liquid and a working cavity 3 filled with cooling liquid are arranged in the base body 1, and the static pressure cavity 2 is positioned above the working cavity 3;

a separation barrel 4 is fixed at the top end of the working cavity 3, the inner wall of the separation barrel 4 is enclosed to form a spray mixing cavity 301, a backflow cavity 302 is formed between the outer wall of the separation barrel 4 and the inner wall of the working cavity 3, a gap is reserved between the bottom end of the separation barrel 4 and the cavity bottom of the working cavity 3 to form an injection port 303, an internal circulation inlet 101 and an internal circulation outlet 102 are formed in the base body 1, the backflow cavity 302 is communicated with the static pressure cavity 2 through the internal circulation inlet 101, and the static pressure cavity 2 is communicated with the spray mixing cavity 301 through the internal circulation outlet 102;

a liquid inlet pipe 5 is fixed on the base body 1, the liquid inlet pipe 5 extends into the spray mixing cavity 301, a plurality of nozzles 6 are fixed at the bottom end of the liquid inlet pipe 5, the nozzles 6 are all communicated with the liquid inlet pipe 5, a heat dissipation area for installing a heat source 7 is arranged at the cavity bottom of the working cavity 3, the heat source 7 is fixedly installed in the heat dissipation area, and the nozzles 6 are all located in the spray mixing cavity 301 and are all located above the heat source 7;

the cooling liquid external circulation heat dissipation device is used for cooling the cooling liquid in the static pressure cavity 2 and the working cavity 3 in a circulation mode, the inlet end of the cooling liquid external circulation heat dissipation device is communicated with the static pressure cavity 2, and the outlet end of the cooling liquid external circulation heat dissipation device is communicated with the liquid inlet pipe 5.

The heat source 7 inclines towards the injection port 303 from top to bottom, and an included angle between the axis of the nozzle 6 and the upper surface of the heat source 7 is an acute angle; thereby preventing collision backflow and enabling the cooling liquid sprayed from the nozzle 6 to flow towards the injection port 303 more easily.

The heat source 7 in the heat dissipation area is multiple.

The height of the topmost end of the heat source 7 in the heat dissipation area is lower than the height of the bottommost end of the separation cylinder 4; the heat sources 7 can be entirely located in a region where the flow rate of the cooling liquid is high.

The coolant liquid extrinsic cycle heat abstractor includes circulating pump 8, cooler 9 and stock solution container 10, hydrostatic pressure chamber 2 passes through pipeline and stock solution container 10 intercommunication, stock solution container 10 passes through pipeline and cooler 9 intercommunication, cooler 9 passes through pipeline and circulating pump 8 intercommunication, circulating pump 8 passes through pipeline and 5 intercommunications of feed liquor pipe.

The cooler 9 is an air-cooled cooler, a tube cooler or a plate cooler.

The circulation pump 8 is a piezoelectric pump.

In this embodiment, the heat source 7 is a chip, two ends of the heat source 7 are fixed on the inner wall of the working chamber 3, and the cooling liquid is an electronic fluorination liquid.

The working principle of the immersed spray cooling heat exchanger in the embodiment is as follows:

the circulating pump 8 works, the cooling liquid in the static pressure cavity 2 sequentially flows through the liquid storage container 10, the cooler 9 and the circulating pump 8, then reaches the liquid inlet pipe 5, and is sprayed out from the nozzle 6 to the heat source 7, the cooling liquid is sprayed out from the nozzle 6 to wash the surface of the heat source 7 at a high speed, the cooling liquid sprayed out from the nozzle 6 generates a high-speed flow in the cooling liquid in the spray mixing cavity 301, so as to drive the surrounding cooling liquid to flow in a mixed manner and mix with the cooling liquid in the spray mixing cavity 301, so as to form an entrainment effect, therefore, the cooling liquid sprayed out from the nozzle 6 can entrain a large amount of cooling liquid in the spray mixing cavity 301 to the entrainment port 303, and further flow to the backflow cavity 302, and then flow to the static pressure cavity 2 from the internal circulation inlet 101, the pressure in the static pressure cavity 2 is relatively stable, and the cooling liquid in the static pressure cavity 2 can be continuously entrained and sucked into the spray mixing cavity 301 from the internal circulation outlet 102, an internal circulation is formed to improve the heat exchange effect, wherein the temperature of the cooling liquid in the matrix 1 is reduced after the cooling liquid is radiated by the cooler 9 in the cooling liquid external circulation radiating device, and then the cooling liquid is sprayed into the spray mixing cavity 301 from the nozzle 6 again.

Wherein, through nozzle 6 blowout coolant liquid, the heat transfer is carried out on the 7 surfaces of high-speed scour heat source, and simultaneously, the high-speed flow that nozzle 6 blowout coolant liquid produced can drive the coolant liquid mixed flow in the spraying hybrid chamber 301, form the entrainment effect, on the one hand, promote the coolant liquid at the velocity of flow of coolant liquid on the 7 surfaces of heat source, improve heat exchange efficiency, on the other hand, make the coolant liquid at spraying hybrid chamber 301, draw mouthful 303, inner loop entry 101, static pressure chamber 2 and inner loop export 102 between constitute the internal circulation and flow, promote the coolant liquid self can be intensive mixing each other, be favorable to the heat transfer between the coolant liquid, promote the ability that the coolant liquid carries the heat, and the heat exchange efficiency is high.

For a chip heat source 7, it is ensured that the operating temperature is maintained below the chip temperature limit, allowing for higher processor utilization.

In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.