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CN-224218692-U - Jet phase change cold plate

CN224218692UCN 224218692 UCN224218692 UCN 224218692UCN-224218692-U

Abstract

The utility model relates to the technical field of cold plates, in particular to a jet phase change cold plate, which comprises a cold plate body, wherein a first partition plate and a second partition plate are arranged in the cold plate body, and a plurality of jet holes are formed in the middle of the second partition plate in a penetrating manner. The utility model ensures that the refrigerant entering the middle cavity can exchange heat with the refrigerant of the upper cavity and the refrigerant of the lower cavity respectively by arranging the upper cavity, the middle cavity and the lower cavity, so that the temperature of the refrigerant in the middle cavity is increased, the refrigerant is changed into a low supercooling degree state or a vapor-liquid two-phase state, the temperature of the refrigerant in the vapor-liquid two-phase state is unchanged after absorbing heat until the liquid refrigerant is completely changed into a gaseous refrigerant, the uniformity of the temperature of a cold plate is ensured, and in addition, the refrigerant with certain pressure is shot into a boiling structure at a certain speed by arranging a plurality of jet holes, the thickness of a wall temperature boundary layer is reduced, thereby achieving the effects of increasing the heat exchange capacity and improving the cooling efficiency.

Inventors

  • WU XIANYING
  • YANG CONGCONG

Assignees

  • 广东海悟科技有限公司

Dates

Publication Date
20260508
Application Date
20250408

Claims (10)

  1. 1. A jet phase change cold plate is characterized by comprising a cold plate body (1), wherein a first partition plate (11) and a second partition plate (12) are arranged in the cold plate body (1), the first partition plate (11) and the second partition plate (12) divide the interior of the cold plate body (1) into an upper cavity (21), a middle cavity (22) and a lower cavity (23), the upper cavity (21) is arranged at the top of the first partition plate (11), the middle cavity (22) is arranged between the first partition plate (11) and the second partition plate (12), the lower cavity (23) is arranged at the bottom of the second partition plate (12), the cold plate body (1) is provided with a liquid inlet pipe (31) and a liquid outlet pipe (32), the liquid inlet pipe (31) is communicated with the middle cavity (22), and the liquid outlet pipe (32) is communicated with the upper cavity (21). The middle part of the second partition plate (12) is provided with a plurality of jet holes (4) in a penetrating mode, two sides of the second partition plate (12) are provided with guide pipes (5), the lower cavity (23) is communicated with the middle cavity (22) through the jet holes (4), and the lower cavity (23) is communicated with the upper cavity (21) through the guide pipes (5).
  2. 2. The jet phase change cold plate according to claim 1, wherein the liquid outlet pipe (32) is arranged in the middle of the upper cavity (21), and the guide pipes (5) are arranged on two sides of the cold plate body (1) along the length direction.
  3. 3. The jet phase change cold plate according to claim 1, wherein the middle part of the second partition plate (12) is provided with a plurality of jet holes (4) in a penetrating mode, and the jet holes (4) are uniformly distributed in the second partition plate (12).
  4. 4. A jet phase change cold plate according to claim 1, wherein the lower cavity (23) is provided with a boiling structure.
  5. 5. A jet phase change cold plate according to claim 4, wherein a gap (6) is provided between the boiling structure and the second partition (12).
  6. 6. A jet phase change cold plate according to claim 4, wherein the jet holes (4) are arranged at the top of the boiling structure.
  7. 7. A jet phase change cold plate according to claim 4, wherein the boiling structure comprises a plurality of ribs (71) extending along the length of the cold plate body (1), and micro channels (72) are formed between the ribs (71).
  8. 8. A jet phase change cold plate according to claim 7, wherein the surface of the rib (71) is provided with a roughness.
  9. 9. A jet flow phase change cold plate according to claim 4, wherein said boiling structure comprises a plurality of granular pieces (81) made of porous material.
  10. 10. A jet phase change cold plate according to claim 9, wherein said boiling structure further comprises copper pillars (82).

Description

Jet phase change cold plate Technical Field The utility model relates to the technical field of cold plates, in particular to a jet phase change cold plate. Background Along with the development of artificial intelligence and big data, the electronic chip is developed in the direction of small size and high power, the heat flow density of the electronic chip is increased more and more, the local temperature exceeds the threshold value of the electronic chip in a very short time, the electronic chip generates thermal stress and thermal strain, the inside of the chip is extruded and pulled, and the chip is damaged permanently due to instant induction of fracture in extreme cases, so that the reasonable control of the temperature and the temperature uniformity of the refrigeration plate is particularly important. The microchannel two-phase cooling plate mainly takes heat away through phase change heat absorption in the fluid flow boiling process, and has the advantages of compact structure, strong heat exchange capability, high heat transfer coefficient, good temperature uniformity and less working medium filling quantity by virtue of the heat transfer characteristic of flow boiling and the microscale effect of the microchannel. Therefore, the technology of fluid boiling phase change cooling in the micro-channel is one of the effective schemes for solving the problem of heat dissipation of high heat flux density. However, since flow boiling is a very intense and complex multiphase flow process, the growth, expansion and movement of bubbles are very susceptible to many factors, resulting in poor stability of the flow boiling process of various working fluids in the microchannels. Once unstable boiling occurs in the microchannels, a series of problems such as maldistribution of flow, intermittent hot spots, oscillations in flow and pressure drop between the parallel multiple channels may result. Disclosure of utility model The utility model aims to overcome the defects in the prior art and provides a jet flow phase change cold plate. The jet phase change cold plate comprises a cold plate body, wherein a first partition plate and a second partition plate are arranged in the cold plate body, the first partition plate and the second partition plate divide the cold plate body into an upper cavity, a middle cavity and a lower cavity, the upper cavity is arranged at the top of the first partition plate, the middle cavity is arranged between the first partition plate and the second partition plate, the lower cavity is arranged at the bottom of the second partition plate, the cold plate body is provided with a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is communicated with the middle cavity, and the liquid outlet pipe is communicated with the upper cavity; The middle part of the second partition board is provided with a plurality of jet holes in a penetrating mode, two sides of the second partition board are provided with guide pipes, the lower cavity is communicated with the middle cavity through the jet holes, and the lower cavity is communicated with the upper cavity through the guide pipes. The utility model is further arranged that the liquid outlet pipe is arranged in the middle of the upper cavity, and the guide pipes are arranged at two sides of the cold plate body along the length direction. The utility model further provides that the middle part of the second partition plate is provided with a plurality of jet holes in a penetrating way, and the jet holes are uniformly distributed on the second partition plate. The utility model further provides that the lower cavity is provided with a boiling structure. The utility model is further arranged that a gap is arranged between the boiling structure and the second partition plate. The utility model is further arranged that the jet holes are arranged at the top of the boiling structure. The utility model further provides that the boiling structure comprises a plurality of ribs extending along the length direction of the cold plate body, and micro-channels are formed among the ribs. The utility model is further arranged that the surface of the rib is provided with a rough structure. The utility model is further arranged that the boiling structure comprises a plurality of granular pieces made of porous material. The utility model further provides that the boiling structure further comprises copper columns. The utility model has the beneficial effects that the upper cavity, the middle cavity and the lower cavity are arranged, so that the refrigerant entering the middle cavity can exchange heat with the refrigerant in the upper cavity and the refrigerant in the lower cavity respectively, the temperature of the refrigerant in the middle cavity is increased, the refrigerant is changed into a low supercooling degree state or a vapor-liquid two-phase state, the temperature of the refrigerant in the vapor-liquid two-phase state is unchanged after absorb