TWI808656B - Liquid cooling device and liquid cooling system having the liquid cooling device - Google Patents

Abstract

A liquid cooling device and liquid cooling system having the liquid cooling device are used to solve the problem of poor heat dissipation efficiency of the conventional liquid cooling device. The liquid cooling device includes a housing with an accommodating groove and a heat conductor combined with the housing. The housing has a one-way valve structure located in the accommodating groove. A phase change chamber is formed between the heat conductor and the housing, and the phase change chamber is used for filling a working fluid, so that the working fluid flows in a downstream direction along the one-way valve structure.

Description

Liquid cooling heat dissipation device and liquid cooling heat dissipation system with the liquid cooling heat dissipation device

The present invention relates to a heat dissipation device and a heat dissipation system with the heat dissipation device, in particular to a liquid cooling heat dissipation device and a liquid cooling heat dissipation system with the liquid cooling heat dissipation device.

The product development of today's technology industry tends to be more sophisticated, such as integrated circuits or computers. In addition to the miniaturization of the volume design, the operating speed has also been greatly increased, so that the current frequently flows between the components, so the heat generated during operation is also considerable. There are corresponding heat exchange devices for various electronic heating elements to maintain their normal operation at the allowable temperature.

For high-power electronic heating elements, a liquid-cooled heat dissipation device (for example: a water cooling head, a water-cooled radiator) is generally used to assist in heat dissipation. A conventional liquid-cooled heat dissipation device has a housing and a heat conduction plate. The housing and the heat conduction plate are combined to form a phase change chamber. The plate is transferred into the phase change chamber, and the heat energy at the heat source is taken away by the circulating flow of the flowing fluid to achieve the purpose of heat dissipation.

However, in the above-mentioned conventional liquid-cooled heat dissipation device, since the flow direction of the fluid is different according to the state of use of the liquid-cooled heat dissipation device (for example: laying flat or standing), the flowing fluid will be affected by gravity and cause instability, so that the flowing fluid cannot efficiently flow out toward the The flow in the direction of the hole causes the flowing fluid to have a limited heat dissipation effect on the heat source, and further makes it difficult for the flowing fluid to effectively dissipate heat to the heat source, resulting in poor heat dissipation efficiency.

In view of this, there is still a need to improve the conventional liquid cooling heat dissipation device.

In order to solve the above problems, the purpose of the present invention is to provide a liquid cooling device and a liquid cooling system with the liquid cooling device, which can make the working fluid flow efficiently in a single direction to provide good heat dissipation efficiency.

Another object of the present invention is to provide a liquid cooling heat dissipation device and a liquid cooling heat dissipation system with the liquid cooling heat dissipation device, which can improve heat exchange efficiency.

Another object of the present invention is to provide a liquid-cooled heat dissipation device and a liquid-cooled heat dissipation system with the liquid-cooled heat dissipation device, which can reduce manufacturing costs.

Another object of the present invention is to provide a liquid-cooled heat dissipation device and a liquid-cooled heat dissipation system having the liquid-cooled heat dissipation device, which can improve manufacturing convenience.

Directions or similar terms mentioned throughout the present invention, such as "front", "rear", "left", "right", "upper (top)", "lower (bottom)", "inner", "outer", "side", etc., mainly refer to the directions of the attached drawings. Each direction or similar terms are only used to assist in explaining and understanding the various embodiments of the present invention, and are not intended to limit the present invention.

The elements and components described throughout the present invention use the quantifier "a" or "an" for convenience and to provide a general meaning of the scope of the present invention; in the present invention, it should be interpreted as including one or at least one, and a single concept also includes plural situations, unless it clearly means otherwise.

Approximate terms such as "combination", "combination" or "assembly" mentioned throughout the present invention mainly include forms that can be separated without destroying the components after connection, or that the components cannot be separated after connection, etc. Those with ordinary knowledge in the field can choose according to the material of the components to be connected or the assembly requirements.

The liquid-cooled heat dissipation device of the present invention includes: a housing with a tank, the housing has a check valve structure located in the tank; and a heat conductor, combined with the housing, a phase change chamber is formed between the heat guide and the housing, and the phase change chamber is used to fill a working fluid so that the working fluid flows along the check valve structure in a downstream direction. There is a gap between the check valve structure and the heat spreader. The gap is less than or equal to the width of the main flow portion.

The liquid-cooled heat dissipation device of the present invention includes: a housing with a tank, the housing has a check valve structure located in the tank; a heat conductor, combined with the housing, a phase change chamber is formed between the heat guide and the housing, and the phase change chamber is used to fill a working fluid so that the working fluid flows along the check valve structure in a downstream direction, and there is a gap between the check valve structure and the heat guide; and a porous structure layer is located in the heat guide, and the gap is formed between the check valve structure and the housing. between the porous layers.

The liquid-cooling heat dissipation device of the present invention includes: a housing with a tank, the housing has a check valve structure located in the tank, the check valve structure has several flow channels, each of the flow channels has a main flow part and several flow dividers, and the several flow dividers are located on both sides of the main flow part; - flow in the direction of flow.

The liquid-cooling heat dissipation device of the present invention includes: a housing with a container, the housing has a one-way valve structure located in the container, the one-way valve structure has several flow channels, each of the flow channels has a main flow part and several flow distribution parts, the several flow distribution parts are located on both sides of the main flow part, and the main flow part forms a straight line; and a heat conductor is combined with the housing, and a phase change chamber is formed between the heat conduction device and the housing The phase change chamber is used to fill a working fluid so that the working fluid flows along the one-way valve structure in a forward direction.

The liquid-cooling heat dissipation device of the present invention comprises: a housing with a container, the housing has a one-way valve structure located in the container, the one-way valve structure has several flow channels, each of the flow channels has a main flow part and several return parts, the several return parts are located on both sides of the main flow part, and the several return parts form a taper in the downstream direction; and a heat conductor is combined with the case, and a phase change chamber is formed between the heat transfer device and the case, and the phase change chamber is used to fill a working fluid , making the working fluid flow in a forward direction along the one-way valve structure.

The liquid-cooling heat dissipation device of the present invention comprises: a housing with a tank, the housing has a check valve structure located in the tank, the check valve structure has several triangular prisms, in the downstream direction, a return flow portion is formed between adjacent triangular prisms, the downstream direction is perpendicular to a transverse direction, and in the transverse direction, a main flow portion is formed between adjacent triangular prisms, and the return flow portion communicates with the main flow portion; The chamber is used for filling a working fluid so that the working fluid flows along the one-way valve structure in a forward direction.

The liquid-cooling heat dissipation device of the present invention includes: a housing with a tank, the housing has a one-way valve structure located in the tank; a heat conductor, combined with the housing, a phase change chamber is formed between the heat conductor and the housing, and the phase change chamber is used to fill a working fluid so that the working fluid flows along the one-way valve structure in a downstream direction; and a porous structure layer is located in the heat conductor, and the porous structure layer contacts the working fluid.

The liquid cooling system of the present invention comprises: the aforementioned liquid cooling device; a cooling unit; and a tube set connected in series between the liquid cooling device and the cooling unit, and the working fluid circulates along the tube set between the liquid cooling device and the cooling unit.

Accordingly, the liquid cooling device of the present invention and the liquid cooling device having the same In a thermal system, the working fluid in the phase change chamber can absorb heat energy from a liquid state and evaporate into a gaseous state, so that the heat energy at the heat source can be absorbed by the working fluid in the phase change chamber. Since the one-way valve structure is provided, the working fluid can efficiently flow and evaporate in a single direction (ie, the downstream direction) along the one-way valve structure. In this way, no matter what the use state of the liquid-cooled heat sink is (for example: lying flat or standing), the working fluid only flows in one direction, that is, The working fluid can be affected to various degrees by overcoming the gravity according to the use state, so that the working fluid can effectively dissipate heat from the heat source, thereby achieving the effect of providing good heat dissipation efficiency. In addition, the heat energy at the heat source can be taken away and cooled when passing through the cooling unit, and then guided to the liquid cooling device again after cooling down. Such continuous circulation can effectively cool down the heat source, which has the effect of improving heat dissipation efficiency, and the liquid cooling system of the present invention can circulate the working fluid without installing a pump, which has the effect of reducing manufacturing costs. In addition, the gap can make the area of the heat source completely covered by the working fluid, and can increase the contact area between the porous structure layer and the working fluid, which has the effect of improving heat exchange efficiency.

Wherein, the containing tank may have a tank surface facing the heat conductor, and the one-way valve structure may be integrally formed on the tank surface. In this way, the one-way valve structure can be firmly connected to the groove surface, which has the effect of improving the structural strength of the one-way valve structure.

Wherein, the one-way valve structure may have several flow channels, and each flow channel may have a main flow part and several flow distribution parts, and the several flow distribution parts may be alternately located on both sides of the main flow part. In this way, the one-way valve has a simple structure and is easy to manufacture, and has the effect of reducing manufacturing cost.

Wherein, each of the return parts may have a curved end and a connecting end, the curved end may be closer to an inflow hole of the casing than the connecting end, the connecting end may be closer to an outlet hole of the casing than the curved end, the returning part may be connected to the main flow part through the connecting end, and the returning part may be tapered from the curved end toward the connecting end. In this way, the structure of the one-way valve is simple and easy to manufacture, which has the effect of convenient manufacture.

Wherein, the plurality of triangular prisms can form several triangular prism groups in the downstream direction, any three adjacent triangular prism groups are defined as the first group, the second group and the third group in sequence, each of the triangular prisms can have a left tip, a right tip and a lower tip, the lower tip can be closer to an inflow hole of the housing than the left tip and the right tip, the left tip and the right tip can be closer to an outlet hole of the housing than the lower tip, and there can be a gap between the left tip and the right tip In the concave arc portion, there may be a left wall between the left tip and the lower tip, and there may be a right wall between the right tip and the lower tip. In the downstream direction, the lower tip of each triangular prism group can be aligned with the concave arc of the adjacent triangular prism. In the transverse direction, the left tip of the triangular prism in the second group can be aligned with the right wall of the adjacent triangular prism in the first group, and the right tip of the triangular prism in the second group can be aligned with the adjacent triangular prism in the third group. The left wall of the body. In this way, the one-way valve has a simple structure and is easy to manufacture, and has the effect of reducing manufacturing cost.

Wherein, the one-way valve structure may be a Tesla valve structure. In this way, the structure of the one-way valve is simple and easy to manufacture, which has the effect of convenient manufacture.

Wherein, the one-way valve structure can abut against the porous structure layer, and there is a gap between the one-way valve structure and the heat conductor. In this way, after the working fluid in the phase change chamber absorbs heat energy from the liquid state and evaporates into a gaseous state, it can immediately enter the plurality of flow channels through the gap and flow in the downstream direction along the one-way valve structure, which has the effect of improving heat dissipation efficiency.

Wherein, the one-way valve structure may have several flow channels, each flow channel may have a main flow portion, and the slit portion may be smaller than or equal to the width of the main flow portion. In this way, the working fluid can stably flow into the plurality of channels, which has the effect of improving the smoothness of flow.

〔this invention〕

1: Shell

11: Tank

11a: groove surface

12: Inflow hole

13: Outflow hole

14: Check valve structure

14a: Triangular prism

141: left tip

142: right tip

143: lower tip

144: Concave arc

145: left wall

146: right wall

2: heat spreader

2a: Heat source contact surface

3: Working fluid

4: Porous structure layer

E1: downstream direction

E2: reverse flow direction

E3: horizontal direction

G1: Gap

G2: width

G3: Gap

H: heat source

J: liquid cooling device

K: Triangular column group

K1: the first group

K2: the second group

K3: The third group

P: Runner

P1: mainstream department

P2: Diverter

P21: arc segment

P3: Return section

P31: Curved end

P32: connected end

Q: cooling unit

Q1: Fan assembly

Q2: Fin assembly

S: phase change chamber

U: pipe fitting group

U1: pipe fittings

U2: pipe fittings

[FIG. 1] An exploded perspective view of a first embodiment of the present invention.

[Fig. 2] An assembled front view of the first embodiment of the present invention.

[Fig. 3] A sectional view taken along line A-A in Fig. 2.

[Fig. 4] A combined sectional view of the gap formed between the heat spreader and the one-way valve structure in the first embodiment of the present invention.

[Fig. 5] A sectional view along the line B-B in Fig. 3.

[Fig. 6] An enlarged view of C shown in Fig. 5.

[Fig. 7] It is a schematic diagram showing that the working fluid will be blocked when it intends to flow in the countercurrent direction according to the first embodiment of the present invention.

[Fig. 8] A structural diagram of a liquid-cooled heat dissipation system with a liquid-cooled heat dissipation device according to the present invention.

[FIG. 9] An assembled sectional view of the second embodiment of the present invention.

[Fig. 10] A cross-sectional view taken along the line D-D in Fig. 9.

[Fig. 11] A cross-sectional view of the structure of the check valve according to the third embodiment of the present invention.

[Fig. 12] A sectional view of the structure of the check valve of the fourth embodiment of the present invention.

In order to make the above and other purposes, features and advantages of the present invention more comprehensible, preferred embodiments of the present invention are specifically cited below, together with the accompanying drawings for detailed description; in addition, those marked with the same symbols in different drawings are deemed to be the same, and their descriptions will be omitted.

Please refer to Figures 1 and 3, which is the first embodiment of the liquid-cooled heat dissipation device J of the present invention. It includes a casing 1 and a heat spreader 2. The heat spreader 2 is combined with the casing 1 to form a phase change chamber S, and the phase change chamber S is used to fill a working fluid 3.

The material of the casing 1 is not limited in the present invention. For example, the casing 1 can be made of see-through material, so that the user can observe the internal conditions through the casing 1, and at the same time, it can have a visual effect of improving the appearance. Alternatively, the housing 1 can be made of high thermal conductivity such as copper or aluminum The housing 1 has a tank 11, which can be formed by injection molding, stamping, die-casting, dry etching, wet etching or plasma etching. The tank 11 can have a groove surface 11a, and the groove surface 11a can face the heat conductor 2.

Please refer to Figures 1, 2 and 3, the housing 1 may have at least one inflow hole 12 and at least one outflow hole 13, the inflow hole 12 and the outflow hole 13 are arranged on different sides of the housing 1, the inflow hole 12 can be used for the working fluid 3 to flow into the housing 1, and the outflow hole 13 can be used for the working fluid 3 to flow out in a direction away from the housing 1. In this embodiment, the inflow direction of the working fluid 3 is the same as the outflow direction, and the inflow hole 1 2. The direction to the outlet hole 13 is defined as a forward flow direction E1, and the direction from the outlet hole 13 to the inlet hole 12 is defined as a reverse flow direction E2.

Please refer to Figures 1 and 3, the housing 1 has a one-way valve structure 14, and the one-way valve structure 14 is located in the tank 11. The one-way valve structure 14 can be manufactured separately from the tank 11 and then assembled to the tank 11. The combination can be welded or welded to the tank 11. Alternatively, the housing 1 can be integrally formed with the one-way valve structure 14. The one-way valve structure 14 can be integrally formed on the groove surface 11a, and the forming method of the one-way valve structure 14 is not limited by the present invention.

Please refer to Figures 5 and 6. Specifically, the one-way valve structure 14 can be a Tesla valve structure. The one-way valve structure 14 can be used to restrict the flow of the working fluid 3 along the forward flow direction E1 to prevent the flow of the working fluid 3 along the reverse flow direction E2. A splitter P2, the plurality of splitters P2 can have an arc segment P21, each of the arc segment P21 can be adjacent to the inflow hole 12, and the splitter P2 can be connected to the main flow part P1 by the arc segment P21, and the plurality of splitters P2 can only be located in the main flow part One side of the P1, or the plurality of splitters P2 may be located on both sides of the main stream P1 respectively. In this embodiment, the plurality of splitters P2 are alternately located on both sides of the main stream P1.

Please refer to Figures 1, 2, and 3. The present invention does not limit the combination of the heat spreader 2 and the housing 1. For example, the heat spreader 2 can be bonded, embedded or locked to the shell 1; Wherein, the heat spreader 2 can be made of a material with high thermal conductivity, such as metal such as copper or aluminum, or coated with a graphene layer, etc., and the heat spreader 2 can be positioned opposite to the container 11 so that the phase change chamber S is formed between the heat spreader 2 and the housing 1 .

Please refer to Figures 1 and 3, and it is further explained that the heat spreader 2 can be located between the housing 1 and a heat source H of an electronic device (not shown in the figure). Wherein, the heat conductor 2 may have a heat source contact surface 2a, and the heat conductor 2 is thermally connected to the heat source H through the heat source contact surface 2a.

In addition, the phase change chamber S is used to fill the working fluid 3 so that the working fluid 3 flows along the one-way valve structure 14 toward the downstream direction E1. The working fluid 3 can be water or other fluids. Preferably, the working fluid 3 can be alcohol, fluorinated liquid or other low-boiling phase change liquids, whereby the working fluid 3 can absorb heat energy from a liquid state and evaporate into a gaseous state, and then use the gas-liquid phase change mechanism to achieve heat energy transfer. The working fluid 3 can also be a non-conductive fluid, so that even if the working fluid 3 leaks, it will not cause a short circuit in the electrical circuit, and it can be used safely.

In particular, since the housing 1 has the one-way valve structure 14, Yites Pull valve principle (tesla valve, when the fluid enters the pipeline from the positive direction, it can be unimpeded without being hindered; but when it enters from the other direction, the fluid flowing out from the branch channel will collide with the fluid in the main channel, thereby hindering the flow of the fluid, and then achieving the effect of preventing backflow). Please refer to FIG. 6 , in the downstream direction E1, even if each flow channel P has the plurality of splitter portions P2, only a small part of the working fluid 3 chooses to detour through the arc segment P21 and flow along the plurality of splitter portions P2, while most of the working fluid 3 will directly flow along the plurality of main flow portions P1, so that the working fluid 3 can flow in the forward direction E1. Also, please refer to FIG. 7 , in the reverse flow direction E2, the working fluid 3 (as shown in FIG. 5 ) is directly divided into the main flow portion P1 and the split flow portion P2, and the working fluid 3 in the flow split portion P2 collides with the working fluid 3 in the main flow portion P1 in the arc segment P21, so that the working fluid 3 will be blocked when it wants to flow in the reverse flow direction E2 in the main flow portion P1. Therefore, the working fluid 3 in the one-way valve structure 14 It is restricted to flow in only one direction, that is, the downstream direction E1 shown in the present invention.

Please refer to Figures 1 and 3, the liquid cooling device J of the present invention can further include a porous structure layer 4, the porous structure layer 4 is located in the heat conductor 2, the porous structure layer 4 can be completely located in the phase change chamber S, and the porous structure layer 4 can contact the working fluid 3; by setting the porous structure layer 4, the contact area between the porous structure layer 4 and the working fluid 3 can be increased, the heat exchange efficiency can be improved, and the heat dissipation performance can be improved. Wherein, the porous structure layer 4 can be made by a powder sintering process. For example, the porous structure layer 4 can be formed by sintering copper powder, or a copper mesh is laid on the heat conductor 2 with solder paste and then reflowed and welded. The system has the advantages of simple manufacturing process and easy processing. The present invention is not limited, as long as the porous structure can be formed.

In addition, please refer to Figures 3 and 6, the porous structure layer 4 may not be in contact with the one-way valve structure 14, there may be a gap G1 between the porous structure layer 4 and the one-way valve structure 14, and the gap G1 may preferably be less than or equal to the width G2 of the main flow portion P1, so that the working The working fluid 3 can stably flow into the plurality of channels P, so that the gap G1 can completely cover the area of the heat source H by the working fluid 3, so that the working fluid 3 can effectively dissipate heat from the heat source H, which can provide good heat dissipation efficiency. In other embodiments, the liquid cooling device J may not include the porous structure layer 4 as shown in FIG. 4 , and the gap G1 may be formed between the heat spreader 2 and the one-way valve structure 14 .

Please refer to Figures 3 and 5, when the liquid cooling device J is in operation, the heat source H can be thermally connected to the heat source contact surface 2a of the heat spreader 2, the working fluid 3 in the phase change chamber S can absorb heat energy from a liquid state and evaporate into a gaseous state, so that the working fluid 3 in the phase change chamber S can absorb the heat energy at the heat source H; at this time, because the one-way valve structure 14 is provided, the working fluid 3 in the phase change chamber S can flow through the several channels P, and the The working fluid 3 can only flow in the direction of the outflow hole 13, that is, the working fluid 3 can efficiently flow and evaporate along the one-way valve structure 14 towards the downstream direction E1. In this way, no matter how the liquid cooling device J is used (for example: lying flat or standing), the working fluid 3 can only flow in one direction, that is, it can overcome gravity. To achieve the effect of providing good heat dissipation efficiency.

Please refer to FIG. 8, which is a preferred embodiment of the liquid-cooled heat dissipation system of the present invention, which includes at least one aforementioned liquid-cooled heat dissipation device J, a cooling unit Q, and a tube set U, and the tube set U is connected in series with the liquid-cooled heat sink J and the cooling unit Q.

In detail, the tube set U can communicate with the inflow hole 12 of the liquid-cooled heat sink J and the cooling unit Q through a tube U1; the tube set U can also connect the outlet hole 13 of the liquid-cooled heat sink J with the cooling unit Q through a tube U2.

Please refer to the 3rd and 8th figures, the liquid cooling system with the liquid cooling heat dissipation device J of this embodiment When the heat dissipation system is in operation, the working fluid 3 in the phase change chamber S can quickly absorb the heat energy at the heat source H, and the working fluid 3 can absorb heat energy from a liquid state and evaporate into a gaseous state, which can dissipate heat from the heat source H connected to the heat conductor 2; at this time, the gaseous working fluid 3 enters the pipe U2 and cools down when passing through the cooling unit Q, and the working fluid 3 can be recondensed into a liquid state, so that the liquid working fluid 3 can be guided to the liquid cooling device again J; such a continuous cycle can effectively reduce the temperature of the heat source H received by the liquid-cooled heat dissipation device J, which can achieve the effect of providing good heat dissipation performance. In particular, the liquid cooling system of the present invention can circulate the working fluid 3 without installing an additional pump, which has the effect of reducing manufacturing cost and saving space.

Please refer to FIG. 8, and it is also explained that the cooling unit Q can have a fan assembly Q1 and a fin assembly Q2, and the fan assembly Q1 can guide the airflow so as to take away the heat energy transferred from the liquid cooling device J to the fin assembly Q2, which can further have a good heat dissipation performance.

Please refer to Figures 9 and 10, which are the second embodiment of the liquid cooling device J of the present invention. The second embodiment is substantially the same as the first embodiment. In the second embodiment, the check valve structure 14 can extend toward the heat spreader 2, so that a part of the check valve structure 14 can abut the porous structure layer 4, so that there can be a gap G3 between the part of the check valve structure 14 and the heat spreader 2, and the gap G3 can preferably be smaller than or equal to the main flow part P1. The width G2, in this way, after the working fluid 3 in the phase change chamber S absorbs heat energy from a liquid state and evaporates into a gaseous state, it can immediately enter the plurality of flow channels P through the gap G3, and flow along the one-way valve structure 14 toward the downstream direction E1, which can improve heat dissipation efficiency. In addition, the plurality of splitters P2 of the one-way valve structure 14 can be located opposite to each other on both sides of the main flow part P1, and each of the main flow parts P1 can preferably be formed in a straight line, so that the working fluid 3 can flow in a straight line in each of the main flow parts P1, which can improve the evaporation efficiency of the working fluid 3.

Please refer to Figure 11, which is the third embodiment of the liquid-cooling heat dissipation device J of the present invention. The third embodiment is substantially the same as the second embodiment. In the third embodiment, each flow channel P may have several return portions P3, and the several return portions P3 may be located only on one side of the main flow portion P1, or the several return flow portions P3 may be respectively located on both sides of the main flow portion P1. In this embodiment, the plurality of return flow portions P3 may be alternately located in the main flow portion P1. On both sides, each of the return portions P3 can have a curved end P31 and a connecting end P32. The curved end P31 is closer to the inflow hole 12 than the connecting end P32 (as shown in Figure 1), and the connecting end P32 is closer to the outlet hole 13 than the curved end P31 (as shown in Figure 1). The end P32 is tapered so that the plurality of recirculation portions P3 can be tapered in the forward flow direction E1 . In this way, the reflux formed by the plurality of recirculation parts P3 is substantially along the forward flow direction E1 of the main flow part P1, and is reversed to the reverse flow direction E2, so that the working fluid 3 will be blocked when it wants to flow in the reverse flow direction E2 in the main flow part P1. Therefore, the working fluid 3 is restricted in the check valve structure 14 to only flow in a single direction, that is, the forward flow direction E1 shown in the present invention. Thus, the check valve structure 14 provides another form. And the one-way valve structure 14 is simple and easy to manufacture, and has the effect of manufacturing convenience.

Please refer to Fig. 12, which is the fourth embodiment of the liquid cooling device J of the present invention. This fourth embodiment is substantially the same as the third embodiment. In the fourth embodiment, the check valve structure 14 may have several triangular prisms 14a, and the several triangular prisms 14a may not be connected. Several triangular prisms 14a of a triangular prism group K are arranged at intervals in the downstream direction E1. For convenience of description, any three adjacent triangular prism groups K are defined as a first group K1, a second group K2 and a third group K3 in sequence.

In detail, each of the triangular prisms 14a may have a left tip 141, a right tip 142 and a lower tip 143, and the lower tip 143 is adjacent to the stream than the left tip 141 and the right tip 142. Inlet hole 12 (as shown in Figure 1), the left tip 141 and the right tip 142 are adjacent to the outlet hole 13 (as shown in Figure 1) than the lower tip 143, there may be a concave arc 144 between the left tip 141 and the right tip 142, there may be a left wall 145 between the left tip 141 and the lower tip 143, there may be a gap between the right tip 142 and the lower tip 143 On the right wall portion 146, in the downstream direction E1, the lower tip 143 of each triangular prism group K can align with the concave arc portion 144 of the adjacent triangular prism 14a; in the transverse direction E3, the left tip 141 of the triangular prism 14a in the second group K2 can be aligned with the right wall 146 of the adjacent triangular prism 14a in the first group K1; the right tip 142 of the triangular prism 14a in the second group K2 can be aligned. The left wall portions 145 of the adjacent triangular prisms 14a located in the third group K3 are aligned so that the several triangular prisms 14a can form a staggered arrangement.

Also, in the downstream direction E1, the recirculation portion P3 can be formed between adjacent triangular prisms 14a, that is, the recirculation portion P3 can be adjacent to the concave arc portion 144, and the downstream direction E1 is perpendicular to a transverse direction E3, and in the transverse direction E3, the main flow portion P1 can be formed between adjacent triangular prisms 14a, and the recirculation portion P3 can communicate with the main flow portion P1. In this way, the reflux formed by the plurality of recirculation parts P3 is substantially along the forward flow direction E1 of the main flow part P1, and is reversed to the reverse flow direction E2, so that the working fluid 3 will be blocked when it wants to flow in the reverse flow direction E2 in the main flow part P1. Therefore, the working fluid 3 is restricted in the check valve structure 14 to only flow in a single direction, that is, the forward flow direction E1 shown in the present invention. Thus, the check valve structure 14 provides another form. And the one-way valve structure 14 is simple and easy to manufacture, and has the effect of manufacturing convenience.

In summary, in the liquid cooling device and the liquid cooling system having the liquid cooling device of the present invention, the working fluid in the phase change chamber can absorb heat energy from a liquid state and evaporate into a gaseous state, so that the working fluid in the phase change chamber can absorb the heat energy at the heat source. Since the one-way valve structure is provided, the working fluid can efficiently flow and evaporate in a single direction (that is, the downstream direction) along the one-way valve structure. lying flat or standing), the working fluid only flows in one direction, that is, it can overcome the gravity Depending on the state of use, the working fluid is affected to various degrees, so that the working fluid can effectively dissipate heat from the heat source, thereby achieving the effect of providing good heat dissipation efficiency. In addition, the heat energy at the heat source can be taken away and cooled when passing through the cooling unit, and then guided to the liquid cooling device again after cooling down. Such continuous circulation can effectively cool down the heat source, which has the effect of improving heat dissipation efficiency, and the liquid cooling system of the present invention can circulate the working fluid without installing a pump, which has the effect of reducing manufacturing costs.

Although the present invention has been disclosed by using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications relative to the above-mentioned embodiments without departing from the spirit and scope of the present invention. It still belongs to the technical scope protected by the present invention. Therefore, the scope of protection of the present invention should include all changes within the context and equivalent scope described in the appended patent claims. In addition, when the above-mentioned several embodiments can be combined, the present invention includes any combination of implementation aspects.

1: shell

11: Tank

11a: groove surface

13: Outflow hole

14: Check valve structure

2: heat spreader

2a: Heat source contact surface

3: Working fluid

4: Porous structure layer

G1: Gap

G2: width

H: heat source

J: liquid cooling device

P: Runner

S: phase change chamber

Claims (15)

A liquid-cooled heat dissipation device, comprising: a housing with a tank, the housing has a check valve structure located in the tank; and a heat conductor, combined with the housing, a phase change chamber is formed between the heat guide and the housing, and the phase change chamber is used to fill a working fluid so that the working fluid flows along the one-way valve structure in a downstream direction. There is a gap between the one-way valve structure and the heat spreader. less than or equal to the width of the main stream. The liquid-cooled heat dissipation device according to claim 1, wherein the container has a surface facing the heat spreader, and the one-way valve structure is integrally formed on the surface of the groove. The liquid cooling heat dissipation device according to claim 1, wherein the one-way valve structure has several flow channels, and each flow channel has a main flow part and several flow distribution parts, and the several flow distribution parts are alternately located on both sides of the main flow part. A liquid-cooled heat dissipation device, comprising: a housing with a tank, the housing has a check valve structure located in the tank; a heat conductor, combined with the housing, a phase change chamber is formed between the heat guide and the housing, the phase change chamber is used to fill a working fluid, and the working fluid flows along the one-way valve structure in a downstream direction, and there is a gap between the one-way valve structure and the heat conductor; and a porous structure layer, located in the heat conductor, the gap is formed between the one-way valve structure and the heat conductor between porous layers. A liquid-cooled heat dissipation device, comprising: a housing with a tank, the housing has a one-way valve structure located in the tank, the one-way valve structure has several flow channels, each of the flow channels has a main flow part and several flow distribution parts, and the several flow distribution parts are located on both sides of the main flow part opposite to each other; and a heat conductor is combined with the housing, and a phase change chamber is formed between the heat conductor and the housing. The phase change chamber is used for filling a working fluid so that the working fluid flows along the one-way valve structure in a forward direction. A liquid-cooling heat dissipation device, comprising: a housing with a tank, the housing has a check valve structure located in the tank, the check valve structure has several flow channels, each of the flow channels has a main flow part and several flow diversion parts, the several flow distribution parts are located on both sides of the main flow part, and the main flow part forms a straight line; The structure flows in a downstream direction. A liquid cooling heat dissipation device, comprising: a housing with a container, the housing has a one-way valve structure located in the container, the one-way valve structure has several flow channels, each of the flow channels has a main flow part and several return parts, the several return parts are located on both sides of the main flow part, and the several return parts form a taper in the direction of the flow; and a heat conductor is combined with the case, and a phase change chamber is formed between the heat transfer device and the case, and the phase change chamber is used to fill a working fluid. The working fluid is made to flow in a forward direction along the one-way valve structure. The liquid-cooling heat dissipation device according to claim 7, wherein each of the return parts has a curved end and a connecting end, the curved end is closer to an inlet hole of the casing than the connecting end, and the connecting end is closer to an outlet hole of the casing than the curved end, the returning part is connected to the main flow part from the connecting end, and the returning part is tapered from the curved end to the connecting end. A liquid cooling heat dissipation device, comprising: a housing with a container, the housing has a one-way valve structure located in the container, the one-way valve structure has several triangular prisms, a return flow portion is formed between adjacent triangular prisms in the downstream direction, the downstream direction is orthogonal to a transverse direction, and a main triangular prism is formed between adjacent triangular prisms in the transverse direction A flow part, the return part communicates with the main flow part; and a heat conductor, combined with the housing, a phase change chamber is formed between the heat conductor and the housing, and the phase change chamber is used to fill a working fluid so that the working fluid flows along the one-way valve structure in a downstream direction. The liquid cooling heat dissipation device according to claim 9, wherein the plurality of triangular prisms form several triangular prism groups in the downstream direction, any three adjacent triangular prism groups are defined as the first group, the second group and the third group in sequence, each of the triangular prisms has a left tip, a right tip and a lower tip, the lower tip is closer to an inlet hole of the housing than the left tip and the right tip, the left tip and the right tip are closer to an outlet hole of the housing than the lower tip, the left tip and the right tip There is a concave arc between the tip, there is a left wall between the left tip and the lower tip, and there is a right wall between the right tip and the lower tip. In the downstream direction, the lower tip of each triangular prism group is aligned with the concave arc of the adjacent triangular prism; The left wall of the body. The liquid-cooled heat dissipation device according to claim 1, wherein the one-way valve structure is a Tesla valve structure. A liquid cooling heat dissipation device includes: a housing with a tank, the housing has a one-way valve structure located in the tank; a heat conductor, combined with the housing, a phase change chamber is formed between the heat conductor and the housing, and the phase change chamber is used to fill a working fluid so that the working fluid flows along the one-way valve structure in a downstream direction; and a porous structure layer is located in the heat conductor, and the porous structure layer contacts the working fluid. The liquid cooling device according to claim 12, wherein the one-way valve structure is in contact with the porous structure layer, and there is a gap between the one-way valve structure and the heat spreader. The liquid cooling heat dissipation device according to claim 13, wherein the one-way valve structure has several flow channels, each of which has a main flow part, and the slit part is smaller than or equal to the width of the main flow part. A liquid-cooled heat dissipation system, comprising: a liquid-cooled heat dissipation device according to any one of claims 1 to 14; a cooling unit; and a pipe assembly connected in series to the liquid-cooled heat dissipation device and the cooling unit, and the working fluid circulates along the pipe assembly between the liquid-cooled heat dissipation device and the cooling unit.