Hourglass-type multi-cavity ribbed tubular vapor chamber and preparation method thereof

Abstract

The invention discloses a hourglass type multi-cavity rib pressing pipe type temperature equalizing plate and a preparation method thereof.The temperature equalizing plate comprises a heat conduction pipe body, a first sealing part is arranged at one end of the heat conduction pipe body, a second sealing part is arranged at the other end of the heat conduction pipe body, the heat conduction pipe body comprises a first sheet body and a second sheet body, and a linear groove is formed in the middle of the first sheet body; the linear groove is formed by recessing the first sheet body towards the inner side, the linear groove extends along the two ends of the first sheet body, and the bottom of the linear groove is fixedly connected with the inner side of the second sheet body. The linear groove is rolled in the upper surface of the vapor chamber, and the bottom of the linear groove is in contact connection with the inner side of the lower part of the vapor chamber, so that a supporting effect is achieved, the mounting and using strength of the vapor chamber is enhanced, the width size of the vapor chamber can be expanded, and the vapor chamber can be applied to a wider heat receiving source; and the strength of the uniform temperature plate is not reduced due to size expansion, so that the overall strength is ensured, and the heat dissipation effect is also ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature equalizing plate preparation, and in particular to an hourglass-shaped multi-cavity ribbed tube-type temperature equalizing plate and a preparation method thereof. Background Art

[0002] With the continuous increase in heat flux density of electronic chips and the increase in power demand, traditional air cooling technology can no longer meet the heat dissipation needs of highly integrated electronic chips, and liquid cooling technology has gradually become the mainstream of the market.

[0003] At present, liquid cooling technology includes direct cooling and indirect cooling. Direct cooling is to fill the chassis with insulating liquid such as fluorinated liquid to directly contact the electronic chip to dissipate heat. This method is limited by the insulating liquid, is costly and difficult to maintain, and is rarely used in the market. Indirect cooling is to set up a liquid flow channel inside the liquid cooling plate. The fluid conducts heat through the contact between the liquid cooling plate and the electronic chip. Since direct contact between the fluid and the electronic chip is avoided, indirect cooling is more popular in existing liquid cooling technologies. However, the process of opening a liquid flow channel in the liquid cooling plate is relatively complicated, the cost is high, and the heat dissipation efficiency cannot be well guaranteed. The liquid cooling plate is easily deformed by pressure during installation and use, which seriously affects the overall heat dissipation performance. In order to ensure a certain installation strength of the liquid cooling plate, the width of the liquid cooling plate cannot be expanded. Therefore, the liquid cooling plate with a small width cannot be used on large chips. In order to solve the above problems, the prior art improves the installation strength of the liquid cooling plate by separately setting a supporting structure in the cavity of the liquid cooling plate. The supporting structure is composed of more than two columns, and each column is arranged one by one inside the liquid cooling plate at an interval. Too many columns not only occupy a large amount of internal space, which affects the circulation of the coolant, but also it is difficult to ensure that the thickness of the set columns is consistent with the thickness of the liquid cooling plate, which leads to uneven overall thermal conductivity and unstable thermal conductivity of the liquid cooling plate.

[0004] Therefore, it is necessary to provide an hourglass-shaped multi-cavity ribbed tubular temperature equalizing plate and a preparation method thereof. Summary of the invention

[0005] The purpose of the present invention is to provide an hourglass-shaped multi-cavity ribbed tube-type temperature-averaging plate and a preparation method thereof in response to the above-mentioned problems. Linear grooves are rolled out on the upper surface of the temperature-averaging plate, and the bottom of the linear grooves is in contact and connected with the lower inner side of the temperature-averaging plate, which plays a supporting role, thereby enhancing the installation and use strength of the temperature-averaging plate, so that the width of the temperature-averaging plate can be expanded and applied to heat sources of wider sizes, and the strength of the temperature-averaging plate will not decrease due to the expansion of the size, thereby ensuring both the overall strength and the heat dissipation effect. The linear grooves are arranged in the middle and do not occupy too much internal space, thereby improving the efficiency of circulating heat conduction. The linear grooves can be achieved by only rolling, and the process is simple, easy to prepare, and production efficiency is improved.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0007] According to one aspect of the present invention, an hourglass-shaped multi-cavity ribbed tube-type temperature equalizing plate is provided, comprising a heat-conducting tube body with a coolant arranged inside, a first sealing portion is arranged at one end of the heat-conducting tube body, the first sealing portion is connected to the heat-conducting tube body as a whole, and a second sealing portion is arranged at the other end of the heat-conducting tube body, the second sealing portion is connected to the heat-conducting tube body as a whole;

[0008] The heat-conducting pipe body includes a first sheet and a second sheet. A linear groove is provided in the middle of the first sheet. The linear groove is formed by the first sheet being recessed inward. The linear groove extends along both ends of the first sheet. The bottom of the linear groove is fixedly connected to the inner side of the second sheet.

[0009] Preferably, the thickness of the linear groove is consistent with the thickness of the first sheet.

[0010] Preferably, it further comprises a liquid absorbent core, which is fixedly arranged on the inner side wall of the first sheet body and the outer side wall of the linear groove.

[0011] Preferably, heat dissipation fins are provided on the outer side wall of the first sheet body, and the heat dissipation fins are fixedly connected to the first sheet body.

[0012] Preferably, the heat dissipation fin includes a first zigzag fin and a second zigzag fin, the first zigzag fin and the second zigzag fin are alternately arranged in sequence along the transverse direction of the first sheet body, the first zigzag fin and the second zigzag fin are fixedly connected, and the crest of the first zigzag fin and the crest of the second zigzag fin are staggered, and the first zigzag fin and the second zigzag fin are both extended along the longitudinal direction of the first sheet body.

[0013] Preferably, the first zigzag fin and the second zigzag fin both have square wave cross-sections.

[0014] Preferably, the heat dissipation fins include a third zigzag fin group, the third zigzag fin group includes a plurality of third zigzag fins arranged in sequence along the longitudinal direction of the first sheet body, the plurality of third zigzag fins are connected in sequence as a whole, and the crests of the third zigzag fins are arranged in a wavy shape along the transverse direction of the first sheet body.

[0015] Preferably, the heat dissipating fins include a fourth zigzag fin group, the fourth zigzag fin group includes a plurality of fourth zigzag fins arranged in sequence along the transverse direction of the first sheet body, the plurality of fourth zigzag fins are connected in sequence, and the crests of the fourth zigzag fins are arranged in a straight line along the longitudinal direction of the first sheet body.

[0016] Preferably, a method for preparing an hourglass-shaped multi-cavity ribbed tubular temperature equalizing plate comprises the following steps:

[0017] S1, selecting a planar substrate, dividing the planar substrate into a first sheet area, a bending area, and a second sheet area, wherein the first sheet area and the second sheet area have the same size, rolling and pressing ribs in the middle of the first sheet area, and rolling out linear grooves arranged along the longitudinal direction of the first sheet;

[0018] S2, after the rolling and rib pressing is completed, the side of the first sheet area away from the bending area is rolled along the longitudinal direction of the first sheet to roll out a first connecting portion with an arc, and the first connecting portion is bent toward the side where the linear groove is recessed, and the side of the second sheet area away from the bending area is rolled along the longitudinal direction of the second sheet to roll out a second connecting portion with an arc, and the second connecting portion is bent toward the side where the linear groove is recessed, and then the middle part of the bending area is rolled to make the first connecting portion and the second connecting portion close to each other to form a U-shaped material, and the rolling is continued until the first connecting portion contacts the second connecting portion, and the contact between the first connecting portion and the second connecting portion is welded to form an O-shaped tube body;

[0019] S3, rolling the two opposite sides of the O-shaped tube body until the bottom of the linear groove contacts the second sheet area, at which time the O-shaped tube body becomes an elliptical tube body, cutting the elliptical tube body to form tube body segments, cleaning the tube body segments, and checking for leaks;

[0020] S4. Weld the contact between the linear groove in the tube body section and the second sheet area, then punch one end of the tube body section so that the upper and lower sides of the end are in close contact, and weld the contact part to form a semi-sealed tube body section. Liquid is passed through the open end of the semi-sealed tube body section for water testing. After the water testing, vacuum the semi-sealed tube body section from the open end and inject coolant;

[0021] S5. Punch and weld the open end of the semi-sealed pipe body section so that both ends of the pipe body section are sealed to form a temperature equalizing plate.

[0022] Preferably, in step S5, the following steps are also included:

[0023] Select a heat sink fin and place it close to an outer wall of the temperature homogenizing plate;

[0024] Welding is performed at the contact point between the heat dissipation fin and the temperature equalizing plate to fix the heat dissipation fin on the outer wall of the temperature equalizing plate.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. The present invention rolls out linear grooves on the upper surface of the temperature equalizing plate, and the bottom of the linear grooves is in contact with the inner side of the lower part of the temperature equalizing plate, which plays a supporting role, thereby strengthening the installation and use strength of the temperature equalizing plate, so that the width of the temperature equalizing plate can be expanded and applied to a heat source of a wider size, and the strength of the temperature equalizing plate will not decrease due to the expansion of the size, thereby ensuring both the overall strength and the heat dissipation effect.

[0027] 2. The linear groove of the present invention is arranged in the middle, which does not occupy too much internal space and improves the efficiency of circulating heat conduction.

[0028] 3. The linear groove of the present invention can be realized only by rolling, the process is simple, easy to prepare, and the production efficiency is improved.

[0029] 4. After the linear groove of the present invention is connected to the second sheet, it is equivalent to dividing the internal space of the temperature equalizer into two relatively independent spaces. The temperature equalizer can be applied to two different chips to dissipate heat for the two chips, thereby improving the utilization rate of the temperature equalizer.

[0030] 5. The linear groove of the present invention can be realized by rolling, which makes it easy to control the thickness of the linear groove to be consistent with the thickness of the first sheet, so that the overall heat conduction of the manufactured temperature equalizing plate is uniform and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0032] Figure 2 is a cross-sectional view of the internal structure of the present invention;

[0033] Figure 3 It is a structural schematic diagram of the rolling and rib-pressing equipment of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the roller device of the present invention;

[0035] Figure 5 is a schematic structural diagram of a welding station of the present invention;

[0036] Figure 6 is a schematic structural diagram of the heat dissipation fin of embodiment 1 of the present invention;

[0037] Figure 7-10 It is the simulation cloud diagram of the comparison 1-3 and the embodiment 1 in the comparative experiment of the present invention;

[0038] Fig.11 is a schematic diagram of the heat dissipation fin structure of embodiment 2 of the present invention;

[0039] Fig.12 is a schematic diagram of the heat dissipation fin structure of embodiment 3 of the present invention;

[0040] Figure 13-16 It is the simulation cloud diagram of Control 1-3 and Example 1 in the comparative experiment of the present invention.

[0041] In the attached drawings, 1, heat-conducting pipe body; 2, first sheet body; 3, second sheet body; 4, linear groove; 5, first sealing part; 6, second sealing part; 7, first zigzag fin; 8, second zigzag fin; 9, third zigzag fin; 10, fourth zigzag fin. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the purpose of enabling the reader to have a thorough understanding of one or more aspects of the invention, and these aspects of the present invention can be realized even without these specific details.

[0043] See also Figures 1 to 16 The present invention provides an hourglass-shaped multi-cavity ribbed tubular temperature equalizing plate and a preparation method thereof, and the technical scheme is as follows:

[0044] like Figure 1-2 As shown, an hourglass-shaped multi-cavity ribbed tube-type temperature-averaging plate comprises a heat-conducting tube body 1, which is formed by bending a sheet and connecting the two sides. The heat-conducting tube body 1 comprises a first sheet body 2 and a second sheet body 3, and a linear groove 4 is provided in the middle of the first sheet body 2, which is formed by the first sheet body being recessed inward, and the linear groove 4 is extended along the two ends of the first sheet body 2, and the bottom of the linear groove 4 is fixedly connected to the inner side of the second sheet body 3. By providing the linear groove 4, the installation strength of the first sheet body 2 and the second sheet body 3 is increased, so that the strength of the manufactured temperature-averaging plate will not decrease due to the increase in the width dimension, so that the temperature-averaging plate is not easy to deform during installation and use, and the heat dissipation performance is not affected by the deformation of the tube body. Moreover, since the linear groove 4 is provided by rolling, the thickness of the linear groove 4 can be controlled to be consistent with the thickness of the first sheet body 2, so that the overall thermal conductivity is more uniform and the thermal conductivity rate is easier to control. Among them, the bottom of the linear groove 4 is set to be a plane, which not only ensures that the contact surface between the linear groove 4 and the second sheet 3 is larger, but also facilitates welding of the contact between the linear groove and the second sheet 3, providing more reliable support for the whole.

[0045] It should be noted that if Figure 3As shown, the linear groove 4 is formed by rolling the rib-forming equipment. The rib-forming equipment includes a base, a placement groove is provided on the base, and a rolling assembly is also provided on the base. The rolling assembly is driven to move by a moving assembly. The rolling assembly includes a roller and a motor. The motor drives the roller to rotate. The rotating roller cooperates with the moving assembly to roll the first sheet to roll out the linear groove 4. Specifically, when the sheet is placed in the placement groove, the moving assembly is first controlled, and then the motor controls the roller to rotate. The moving assembly cooperates with the motor to rotate the roller and move at the same time, rolling the sheet, thereby forming a linear groove on the sheet. As shown Figure 4 As shown, the sheet after rolling and rib pressing is made into a heat-conducting pipe body 1 by a roller device. Specifically, an upper roller with a gradually decreasing thickness is used to roll the sheet, and a concave roller with a gradually decreasing width is used to gradually tighten the two sides of the sheet from a flat state and slowly turn it into a U-shaped profile. Finally, the tightening roller is replaced and the U-shaped profile is continued to be rolled to make the two sides of the U-shaped profile close together. Finally, the two sides that are close together are welded by a welding station assembly to form an O-shaped pipe body. The welding station assembly is shown in FIG. Figure 5 shown.

[0046] A first sealing portion 5 is provided at one end of the heat-conducting pipe body 1, and the first sealing portion 5 is connected to the heat-conducting pipe body 1 as a whole. A second sealing portion 6 is provided at the other end of the heat-conducting pipe body 1, and the second sealing portion 6 is connected to the heat-conducting pipe body 1 as a whole. The first sealing portion 5 and the second sealing portion 6 are both formed by stamping at the end of the heat-conducting pipe body by a stamping device. Specifically, the end of the heat-conducting pipe body 1 is placed in the stamping device, and the upper and lower sides of the end of the heat-conducting pipe body 1 are stamped by the stamping device. The end of the first sheet 2 is bent inwardly to form a first bending portion, and the end of the second sheet is bent inwardly to form a second bending portion. The stamping makes the upper and lower sides of the end of the heat-conducting pipe body 1 close together, and finally the close parts of the upper and lower sides are welded by a high-frequency welding station. The same operation is performed on the other end of the heat-conducting pipe body 1 to seal the two ends of the heat-conducting pipe body 1 to form a temperature equalizing plate.

[0047] The cavity of the temperature-averaging board is filled with cooling liquid, which evaporates when the temperature of the heated end of the temperature-averaging board rises. The gaseous cooling material rises to the cold end on the upper side of the temperature-averaging board, and falls back to the hot end after liquefaction, and continuously circulates to achieve the effect of heat dissipation. In the cavity of the temperature-averaging board, the linear groove is equivalent to dividing the cavity into two small cavities, and the two small cavities can perform relatively independent gas-liquid circulation, so that the temperature-averaging board can also be used to dissipate heat and cool different chips at the same time.

[0048] Furthermore, a liquid wick is also provided on the inner side wall of the first sheet 2 and the outer side wall of the linear groove 4. The liquid wick is based on the capillary effect and the principle of liquid dynamics. When the liquid contacts the surface of the liquid wick, due to the micro-pore structure inside the liquid wick, the liquid is quickly sucked in and diffused along the fiber network, forming a "wicking" phenomenon. This effect enables the liquid to flow back to the evaporation end under the action of gravity, thereby facilitating the transfer and circulation of heat. The liquid wick includes a metal mesh type or a metal sintering type. The metal mesh type is to attach a metal wire mesh of a certain mesh number to the inner side wall of the first sheet 2 and the outer side wall of the dotted groove. The metal sintering type includes powder sintering and fiber sintering. By providing the liquid wick, the heat transfer rate and the circulation of the coolant are increased, and the heat dissipation efficiency is further improved.

[0049] like Figure 6 As shown, a heat dissipation fin is arranged on the outer wall of the first sheet 2, and the heat dissipation fin is fixedly connected to the first sheet 2. The heat dissipation fin includes a first zigzag fin 7 and a second zigzag fin 8, which are arranged alternately in the transverse direction of the first sheet 2, the first zigzag fin 7 and the second zigzag fin 8 are fixedly connected, and the wave crest of the first zigzag fin 7 and the wave crest of the second zigzag fin 8 are staggered, and the first zigzag fin 7 and the second zigzag fin 8 are both extended along the longitudinal direction of the first sheet 2. The heat dissipation fin is in contact with the first sheet 2, and the heat of the first sheet 2 can be transferred to dissipate heat, thereby improving the heat dissipation effect. The wave crest of the first zigzag fin 7 of the heat dissipation fin is staggered with the wave crest of the second zigzag fin 8, so that the first zigzag fin 7 and the second zigzag fin 8 form a staggered gap, and air can flow through the staggered gap, thereby improving the heat dissipation effect of the heat dissipation fin.

[0050] A method for preparing an hourglass-shaped multi-cavity ribbed tube-type temperature-averaging plate and a method for preparing the same, characterized in that the method comprises the following steps:

[0051] S1, selecting a planar substrate, dividing the planar substrate into a first sheet area, a bending area, and a second sheet area, wherein the first sheet area and the second sheet area have the same size, rolling and pressing ribs in the middle of the first sheet area, and rolling out linear grooves arranged along the longitudinal direction of the first sheet;

[0052] S2, after the rolling and rib pressing is completed, the side of the first sheet area away from the bending area is rolled along the longitudinal direction of the first sheet to roll out a first connecting portion with an arc, and the first connecting portion is bent toward the side where the linear groove is recessed, and the side of the second sheet area away from the bending area is rolled along the longitudinal direction of the second sheet to roll out a second connecting portion with an arc, and the second connecting portion is bent toward the side where the linear groove is recessed, and then the middle part of the bending area is rolled to make the first connecting portion and the second connecting portion close to each other to form a U-shaped material, and the rolling is continued until the first connecting portion contacts the second connecting portion, and the contact between the first connecting portion and the second connecting portion is welded to form an O-shaped tube body;

[0053] S3, rolling the two opposite sides of the O-shaped tube body until the bottom of the linear groove contacts the second sheet area, at which time the O-shaped tube body becomes an elliptical tube body, cutting the elliptical tube body to form tube body segments, cleaning the tube body segments, and checking for leaks;

[0054] S4. Weld the contact between the linear groove in the tube body section and the second sheet area, then punch one end of the tube body section so that the upper and lower sides of the end are in close contact, and weld the contact part to form a semi-sealed tube body section. Liquid is passed through the open end of the semi-sealed tube body section for water testing. After the water testing, vacuum the semi-sealed tube body section from the open end and inject coolant;

[0055] S5. Punch and weld the open end of the semi-sealed tube section to seal both ends of the tube section to form a temperature-averaging plate. Select a heat sink fin, place the heat sink fin close to an outer wall of the temperature-averaging plate, weld the heat sink fin at the contact point with the temperature-averaging plate, and fix the heat sink fin to the outer wall of the temperature-averaging plate.

[0056] By adopting the above-mentioned preparation process, the process is simple, the preparation efficiency is improved, and the process cost is reduced. Through this process, a temperature homogenizing board with better heat dissipation performance can be prepared.

[0057] The present invention carries out comparative experiment, and the conditions are:

[0058] Under the same outer dimensions (120mm×26mm T=2mm), compared with aluminum plate, O-tube without internal support and harmonica tube with internal columnar support, using the same heat source, heat source conditions: size (10mm×10mm) heat flow (50w), no cooling conditions, two seconds transient performance, the following Table 1 is obtained:

[0059] Table 1

[0060]

[0061] In Table 1, Comparative Example 1 is an aluminum plate, Comparative Example 2 is an O-type tube, Comparative Example 3 is a harmonica tube, and Example 1 is a temperature averaging board of the present invention. As can be seen from Table 1, the temperature averaging board of the present application has a significant drop in heat source temperature and a significant heat dissipation effect compared to Comparative Examples 1-3, and is lighter and has better heat dissipation performance. Figure 7-10 shown.

[0062] Example 2

[0063] like Fig.11As shown, the present invention provides an hourglass-shaped multi-cavity ribbed tubular temperature equalizing plate and a preparation method thereof. Different from Example 1, in this embodiment, the heat dissipation fins include a third folded-line fin group, and the third folded-line fin group includes a plurality of third folded-line fins 9 arranged in sequence along the longitudinal direction of the first sheet body, and the plurality of third folded-line fins 9 are sequentially connected as a whole, and the crests of the third folded-line fins 9 are arranged in a wavy shape along the transverse direction of the first sheet body. The wavy heat dissipation fins increase the space for air circulation, so that the air can take away more heat from the heat dissipation fins, thereby improving the heat dissipation effect.

[0064] Example 3

[0065] like Fig.12 As shown, the present invention provides an hourglass-shaped multi-cavity ribbed tubular temperature equalizing plate and a preparation method thereof. Different from Example 1, in this embodiment, the heat dissipation fins include a fourth folded-line fin group, and the fourth folded-line fin group includes a plurality of fourth folded-line fins 10 arranged in sequence along the transverse direction of the first sheet body, and the plurality of fourth folded-line fins 10 are sequentially connected as a whole, and the crests of the fourth folded-line fins 10 are arranged in a straight line along the longitudinal direction of the first sheet body. The straight-line heat dissipation fins improve the heat dissipation efficiency, are simple to manufacture, and are easy to produce, thereby improving production efficiency.

[0066] Under the same outer dimensions (120mm×26mm T=2mm), compared with the combination of aluminum plate and heat sink fin, the combination of O-tube and heat sink fin without internal support, and the combination of harmonica tube and heat sink fin with internal columnar support, the same heat source is used, the heat source conditions are: size (10mm×10mm) heat flow (50w), no cooling conditions, two seconds transient performance, and the following Table 2 is obtained:

[0067] Table 2

[0068]

[0069] In Table 2, Control Example 1 is a combination of aluminum plate and heat sink fins, Control Example 2 is a combination of O-tube and heat sink fins, Control Example 3 is a combination of harmonica tube and heat sink fins, and Example 1 is a combination of the temperature averaging plate and heat sink fins of the present invention. It can be seen from Table 2 that the combination of the temperature averaging plate and heat sink fins of the present application has a significant drop in heat source temperature and a significant heat dissipation effect compared to Controls 1-3, and is lighter and has better heat dissipation performance. The simulation cloud diagram is shown in FIG. Figure 13-16 shown.

[0070] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An hourglass-shaped multi-cavity ribbed tube-type temperature equalizing plate, characterized in that: A heat-conducting pipe body is provided with a cooling liquid inside, a first sealing part is provided at one end of the heat-conducting pipe body, the first sealing part is connected to the heat-conducting pipe body as a whole, and a second sealing part is provided at the other end of the heat-conducting pipe body, the second sealing part is connected to the heat-conducting pipe body as a whole; The heat-conducting pipe body includes a first sheet and a second sheet. A linear groove is provided in the middle of the first sheet. The linear groove is formed by the first sheet being recessed inward. The linear groove extends along both ends of the first sheet. The bottom of the linear groove is fixedly connected to the inner side of the second sheet.

2. The hourglass-shaped multi-cavity ribbed tube-type temperature equalizing plate according to claim 1, characterized in that: The thickness of the linear groove is consistent with the thickness of the first sheet.

3. The hourglass-shaped multi-cavity ribbed tube-type temperature equalizing plate according to claim 1, characterized in that: It also includes a liquid absorbent core, which is fixedly arranged on the inner side wall of the first sheet body and the outer side wall of the linear groove.

4. The hourglass-shaped multi-cavity ribbed tube-type temperature equalizing plate according to claim 1, characterized in that: The outer wall of the first sheet body is provided with heat dissipation fins, and the heat dissipation fins are fixedly connected to the first sheet body.

5. The hourglass-shaped multi-cavity ribbed tube-type temperature equalizing plate according to claim 4, characterized in that: The heat dissipation fin includes a first zigzag fin and a second zigzag fin, the first zigzag fin and the second zigzag fin are alternately arranged in sequence along the transverse direction of the first sheet body, the first zigzag fin and the second zigzag fin are fixedly connected, and the crest of the first zigzag fin and the crest of the second zigzag fin are staggered, and the first zigzag fin and the second zigzag fin are both extended along the longitudinal direction of the first sheet body.

6. The hourglass-shaped multi-cavity ribbed tube-type temperature equalizing plate according to claim 5, characterized in that: The first zigzag fin and the second zigzag fin both have square wave cross sections.

7. The hourglass-shaped multi-cavity ribbed tube-type temperature equalizing plate according to claim 4, characterized in that: The heat dissipation fins include a third zigzag fin group, which includes a plurality of third zigzag fins arranged in sequence along the longitudinal direction of the first sheet body, the plurality of third zigzag fins are connected in sequence, and the crests of the third zigzag fins are arranged in a wavy shape along the transverse direction of the first sheet body.

8. The hourglass-shaped multi-cavity ribbed tube-type temperature equalizing plate according to claim 4, characterized in that: The heat dissipation fins include a fourth zigzag fin group, which includes a plurality of fourth zigzag fins arranged in sequence along the transverse direction of the first sheet body, the plurality of fourth zigzag fins are connected in sequence, and the crests of the fourth zigzag fins are arranged in a straight line along the longitudinal direction of the first sheet body.

9. The method for preparing an hourglass-shaped multi-cavity ribbed tubular temperature equalizing plate according to claim 1, characterized in that: The following steps are involved: S1, selecting a planar substrate, dividing the planar substrate into a first sheet area, a bending area, and a second sheet area, wherein the first sheet area and the second sheet area have the same size, rolling and pressing ribs in the middle of the first sheet area, and rolling out linear grooves arranged along the longitudinal direction of the first sheet; S2, after the rolling and rib pressing is completed, the side of the first sheet area away from the bending area is rolled along the longitudinal direction of the first sheet to roll out a first connecting portion with an arc, and the first connecting portion is bent toward the side where the linear groove is recessed, and the side of the second sheet area away from the bending area is rolled along the longitudinal direction of the second sheet to roll out a second connecting portion with an arc, and the second connecting portion is bent toward the side where the linear groove is recessed, and then the middle part of the bending area is rolled to make the first connecting portion and the second connecting portion close to each other to form a U-shaped material, and the rolling is continued until the first connecting portion contacts the second connecting portion, and the contact between the first connecting portion and the second connecting portion is welded to form an O-shaped tube body; S3, rolling the two opposite sides of the O-shaped tube body until the bottom of the linear groove contacts the second sheet area, at which time the O-shaped tube body becomes an elliptical tube body, cutting the elliptical tube body to form tube body segments, cleaning the tube body segments, and checking for leaks; S4. Weld the contact between the linear groove in the tube body section and the second sheet area, then punch one end of the tube body section so that the upper and lower sides of the end are in close contact, and weld the contact part to form a semi-sealed tube body section. Liquid is passed through the open end of the semi-sealed tube body section for water testing. After the water testing, vacuum the semi-sealed tube body section from the open end and inject coolant; S5. Punch and weld the open end of the semi-sealed pipe body section so that both ends of the pipe body section are sealed to form a temperature equalizing plate.

10. The preparation process of the hourglass-shaped multi-cavity ribbed tubular temperature equalizing plate according to claim 9, characterized in that: In the step S5, the following steps are also included: Select a heat sink fin and place it close to an outer wall of the temperature homogenizing plate; Welding is performed at the contact point between the heat dissipation fin and the temperature equalizing plate to fix the heat dissipation fin on the outer wall of the temperature equalizing plate.

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