A graphite temperature-uniform composite phase-change energy storage radiator

Abstract

The invention discloses a graphite uniform temperature composite phase change energy storage radiator, which relates to the technical field of energy storage radiators, and comprises an upper shell and a lower shell. The lower shell is provided with a plurality of heat conduction cavities on the end surface close to the upper shell, and the lower shell is provided with heat dissipation cavities on both sides of the heat conduction cavity. A thin graphite sheet is arranged in the heat conduction cavity, and a heat transfer space is formed between the thin graphite sheet and the bottom of the heat conduction cavity. The lower shell is provided with a plurality of flow holes on both side walls of the heat conduction cavity, and the flow holes are connected with the heat dissipation cavity on the same side. The heat dissipation cavity is filled with phase change material, and the phase change material is filled into the heat transfer space through the flow holes. A heat conduction block is fixed at the bottom of the upper shell corresponding to the thin graphite sheet, and the heat conduction block contacts the thin graphite sheet, thereby effectively solving the temperature control problem of electronic components with high heat flux density in a closed space for a short time.

Description

Technical Field

[0001] The invention relates to the technical field of energy storage radiators, and in particular to a graphite uniform temperature composite phase change energy storage radiator. Background Art

[0002] The phase change materials filled in the existing traditional phase change heat sink are mostly paraffin-based phase change materials, which have a large latent heat of phase change and can effectively absorb a large amount of heat. However, the thermal conductivity of paraffin-based phase change materials is relatively low. For scenarios where a large amount of heat dissipation is required in a short period of time, the heat cannot be quickly transferred to the entire heat sink, resulting in insufficient phase change of the phase change material and the inability to effectively exert the temperature suppression function of the heat sink.

[0003] For traditional single phase change heat sinks, electronic chips with high power and concentrated heat sources in a confined space may fail due to rapid temperature rise before the heat is transferred to the entire phase change material part. Although traditional solid-state temperature-averaging heat sinks can quickly distribute heat to the entire heat sink through their own high thermal conductivity properties, they are limited by the heat transfer structure and will sacrifice the filling space of the phase change material, resulting in a reduction in the heat absorption of the phase change material itself, which can effectively reduce the temperature limit of electronic components. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a graphite temperature-uniform composite phase-change energy storage radiator, which effectively solves the temperature control problem of electronic components with short-term high heat flux density in a confined space.

[0005] The objective of the present invention is achieved through the following technical scheme: a graphite uniform temperature composite phase change energy storage radiator, comprising an upper shell and a lower shell, the lower shell having a plurality of heat conduction cavities on the end face close to the upper shell, the lower shell having heat dissipation cavities on both sides of the heat conduction cavity, a thin graphite sheet is arranged in the heat conduction cavity, a heat transfer space is formed between the thin graphite sheet and the bottom of the heat conduction cavity, the lower shell having a plurality of flow holes on both side walls of the heat conduction cavity, the flow holes being connected to the heat dissipation cavity on the same side, the heat dissipation cavity being filled with phase change material, and the phase change material being filled into the heat transfer space through the flow holes, a heat conduction block is fixed at the bottom of the upper shell corresponding to the thin graphite sheet, and the heat conduction block contacts the thin graphite sheet.

[0006] Furthermore, an elastic pad is fixed to the bottom of the heat-conducting cavity, an L-shaped tube is connected to the side wall of the lower shell, one end of the L-shaped tube is connected to the heat dissipation cavity, a pressure sensor is provided at one end of the L-shaped tube away from the lower shell, an elastic part is provided in the L-shaped tube, and a detection axis of the pressure sensor penetrates into the L-shaped tube and contacts the elastic part.

[0007] Furthermore, the elastic member includes a piston, a spring and a pressure plate. The piston is fitted in the L-shaped tube through its own deformation interference fit. The pressure plate contacts the detection axis of the pressure sensor. The two ends of the spring are respectively connected to the piston and the pressure plate.

[0008] Furthermore, an elastic support platform is provided in the heat-conducting cavity, the outer wall of the elastic support platform is fitted and connected to the inner wall of the heat-conducting cavity, the elastic support platform is hollow, the thin graphite sheet is placed on the elastic support platform, a buffer gap is formed between the outer wall of the heat-conducting block and the inner wall of the heat-conducting cavity, a plurality of conduction paths are opened in the heat-conducting block, one end of the conduction path is conducted to the bottom of the heat-conducting block, and the other end is conducted to the buffer gap from the side wall of the heat-conducting block.

[0009] Furthermore, four side walls of the heat-conducting cavity are each provided with a heat-conducting groove, a metal heat-conducting sheet is slidably arranged in the heat-conducting groove, and one end of the metal heat-conducting sheet extends out of the heat-conducting groove to contact the top surface of the thin graphite sheet.

[0010] Furthermore, the heat-conducting groove extends to the top surface of the lower shell body, and the shape of the heat-conducting groove is L-shaped. A heat-conducting wedge block is slidably arranged in the heat-conducting groove, and the heat-conducting wedge block moves in a horizontal direction. One end of the metal heat-conducting sheet is connected to the heat-conducting wedge block. A downward pressure rod is slidably arranged in the heat-conducting groove, and the downward pressure rod moves in a vertical direction. A wedge-shaped surface is provided on the top of the heat-conducting wedge block away from one end of the metal heat-conducting sheet, and the wedge surface is located on the moving path of the downward pressure rod. When the upper shell body and the lower shell body are connected together, the downward pressure rod contacts the upper shell body, and the metal heat-conducting sheet extends from the heat-conducting groove to contact the thin graphite sheet.

[0011] Furthermore, the metal heat conductive sheet includes a transfer portion and a contact portion, the heat conductive wedge block is connected to an elastic sealing block, a horizontal groove is provided at one end of the elastic sealing block close to the heat conductive wedge block, a notch is provided at the bottom of the elastic sealing block, the notch is connected to the horizontal groove, the contact portion is embedded in the notch, and the transfer portion is inserted into the horizontal groove to connect to the contact portion.

[0012] Furthermore, a plug-in rod is fixed at the four corners of the bottom of the upper shell body, the cross-sectional shape of the plug-in rod is rectangular, the side wall of the plug-in rod is connected with an elastic sheet, the elastic sheet is transitionally connected to the bottom arc of the plug-in rod, the angle between the elastic sheet and the plug-in rod is an acute angle, a rectangular groove is provided on the top surface of the lower shell body corresponding to the position of the plug-in rod, a vertical groove is provided on the side wall of the rectangular groove close to the edge of the lower shell body, the lower shell body is connected to a limiting groove at the bottom of the vertical groove, the plug-in rod is slidably adapted to the rectangular groove, and the top of the elastic sheet is against the step formed by the vertical groove and the limiting groove.

[0013] Furthermore, a sealing ring is fixed to the bottom of the upper shell, and an annular sealing groove is opened at the top of the lower shell. The heat conduction cavity and the heat dissipation cavity are both located in the annular sealing groove. The depth of the annular sealing groove is smaller than the axial length of the sealing ring. The sealing ring is interference fitted in the annular sealing groove, and the limit groove passes through the side wall of the lower shell.

[0014] Furthermore, a liquid injection hole is provided on the side wall of the lower shell, and the liquid injection hole is connected to the heat dissipation cavity. The liquid injection hole is a stepped hole, and the liquid injection hole includes a large-diameter threaded hole and a small-diameter hole sequentially opened in a direction close to the heat dissipation cavity. The internal thread of the large-diameter threaded hole is adapted with a hard plug, and one end of the hard plug is connected to a butyl rubber block, and the butyl rubber block rests on the step formed by the large-diameter threaded hole and the small-diameter hole. The hard plug is provided with a pin hole along its own axial direction.

[0015] The beneficial effects of the present invention are:

[0016] 1. High thermal conductivity thin graphite sheets are used for rapid heat conduction, transferring the heat from the heat source to the surroundings along the plane. Most of the heat is transferred to the phase change material through the thin graphite sheet, and the phase change material absorbs the heat through phase change; the other part of the heat is transferred to the aluminum alloy structure of the radiator, reducing the temperature difference of the structure itself, and making full use of the heat capacity of the structure for heat dissipation, thereby adopting a combination of high thermal conductivity and phase change heat absorption for heat dissipation, which can quickly transfer the heat to the phase change material for absorption, improve the heat dissipation effect, and achieve a rapid cooling effect.

[0017] 2. As the state of the phase change material changes, its volume will also change. The elastic deformation of the elastic pad adapts to the volume change of the phase change material, so that the thin graphite sheet can always contact the phase change material, achieving a high thermal conductivity effect.

[0018] 3. Since the thermal conductivity of the graphite sheet in the thickness direction is not high, in order to achieve high thermal conductivity, the graphite sheet needs to be set in a thin sheet shape, which causes the graphite sheet to break after long-term use. When the thin graphite sheet breaks, the phase change material will enter the buffer gap through the thin graphite sheet, reducing the pressure in the L-shaped tube. The pressure state in the L-shaped tube is detected in real time by the pressure sensor to determine the operating state of the thin graphite sheet, so as to facilitate timely maintenance.

[0019] 4. Heat conduction is carried out by contacting the thin graphite sheet with the metal thermal conductive sheet, so that the thin graphite sheet indirectly contacts the lower shell through the metal thermal conductive sheet and the thermal conductive wedge block to achieve rapid heat transfer, and the influence of the assembly gap of the thin graphite sheet on the thermal conductivity effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1Schematic diagram of the explosion of a graphite uniform temperature composite phase change energy storage radiator of the present invention Figure 1 ;

[0021] Figure 2 Schematic diagram of the explosion of a graphite uniform temperature composite phase change energy storage radiator of the present invention Figure 2 ;

[0022] Figure 3 Schematic diagram of the explosion of a graphite uniform temperature composite phase change energy storage radiator of the present invention Figure 3 ;

[0023] Figure 4 It is a partial schematic diagram of the lower shell of a graphite temperature-uniform composite phase-change energy storage radiator of the present invention;

[0024] Figure 5 Schematic diagram of the explosion of a graphite uniform temperature composite phase change energy storage radiator of the present invention Figure 4 ;

[0025] Figure 6 A top view of a graphite temperature-uniform composite phase-change energy storage radiator according to the present invention;

[0026] Figure 7 for Figure 6 Middle AA section view;

[0027] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0028] Fig. 9 This is a schematic diagram of the structure of a graphite temperature-uniform composite phase-change energy storage radiator of the present invention;

[0029] Fig.10 for Fig. 9 Middle BB section view;

[0030] Fig.11 for Fig.10 Enlarged view of point E in the middle;

[0031] Fig.12 for Fig. 9 Middle DD section view;

[0032] Fig.13 for Fig.12 Enlarged view of point G in the middle;

[0033] Fig.14 for Figure 5 Enlarged view of point F in the middle;

[0034] In the figure, 1-upper shell, 2-lower shell, 3-heat conduction cavity, 4-thin graphite sheet, 5-heat dissipation cavity, 6-circulation hole, 7-heat conduction block, 8-elastic pad, 9-L-shaped tube, 10-pressure sensor, 11-piston, 12-spring, 13-pressure plate, 14-elastic support platform, 15-conduction path, 16-heat conduction groove, 17-metal heat conduction sheet, 18-heat conduction wedge block, 19-lower pressure rod, 20-wedge surface, 21-transmission part, 22-contact part, 23-elastic sealing block, 24-horizontal groove, 25-slot, 26-plug rod, 27-elastic sheet, 28-rectangular groove, 29-vertical groove, 30-limiting groove, 31-sealing ring, 32-annular sealing groove, 33-injection hole, 34-hard plugging, 35-butyl rubber block, 36-pin hole. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0036] Embodiment 1

[0037] like Figures 1 to 14As shown, a graphite uniform temperature composite phase change energy storage radiator comprises an upper shell 1 and a lower shell 2, wherein the lower shell 2 is provided with a plurality of heat conduction cavities 3 on the end surface close to the upper shell 1, and the lower shell 2 is provided with heat dissipation cavities 5 on both sides of the heat conduction cavity 3, wherein a thin graphite sheet 4 is arranged in the heat conduction cavity 3, and a heat transfer space is formed between the thin graphite sheet 4 and the bottom of the heat conduction cavity 3, and the lower shell 2 is provided with a plurality of flow holes 6 on both side walls of the heat conduction cavity 3, and the flow holes 6 are connected with the heat dissipation cavity 5 on the same side, and the heat dissipation cavity 5 is filled with phase change material, and the phase change material is filled into the heat transfer space through the flow holes 6, and a heat conduction block 7 is fixed to the bottom of the upper shell 1 corresponding to the thin graphite sheet 4, and the heat conduction block 7 contacts A thin graphite sheet 4 and a liquid injection hole 33 are provided on the side wall of the lower shell 2, and the liquid injection hole 33 is connected to the heat dissipation cavity 5. A thin graphite sheet 4 is installed in each heat conduction cavity 3, and the arrangement position of the thin graphite sheet 4 is the uniform temperature area. The heat source is arranged above the uniform temperature area, and heat conduction is transferred through the high thermal conductivity thin graphite sheet 4. After the upper shell 1 and the lower shell 2 are installed together, the phase change material is injected into the heat dissipation cavity 5 through the liquid injection hole 33. The phase change material can be selected from paraffin phase change material or metal phase change material. The phase change material is liquefied by high temperature, and the phase change material is injected into the heat dissipation cavity 5 through the liquid injection hole 33 by an injection gun at high temperature. The liquefied phase change material has fluidity, so that the phase change The material enters the heat-conducting cavity 3 through the flow hole 6, so that the phase change material is located below the thin graphite sheet 4 to absorb the heat transferred by the thin graphite sheet 4, so that the heat dissipation cavity 5 and the bottom of the thin graphite sheet 4 are filled with the phase change material, so that the phase change material can contact the thin graphite sheet 4 after solidification, and can quickly and effectively absorb the heat transferred by the thin graphite sheet 4 through contact heat absorption. Since the thermal conductivity of the graphite sheet in the thickness direction is not high, in order to achieve high thermal conductivity, the thin graphite sheet is set to a thin sheet shape, and the heat source is installed in the uniform temperature area of ​​the radiator. The upper shell 1, the lower shell 2 and the heat-conducting block 7 are all made of aluminum alloy material, which has good thermal conductivity. The heat generated by the heat source passes through the upper shell 1 and the heat-conducting block 7 is transferred to the thin graphite sheet 4, and the heat from the heat source is transferred to the surroundings along the plane through the thin graphite sheet 4. Most of the heat is transferred to the phase change material by the thin graphite sheet 4, and the phase change material absorbs the heat through phase change. Due to the contact arrangement between the thin graphite sheet 4 and the phase change material, the phase change material can quickly and effectively absorb the heat transferred by the thin graphite sheet 4; the other part of the heat is transferred to the aluminum alloy structural parts of the radiator, that is, the upper shell 1 and the lower shell 2, to reduce the temperature difference of the structural parts themselves, and make full use of the heat capacity of the structural parts for heat dissipation, so as to adopt the combination of high thermal conductivity and phase change heat absorption for heat dissipation, which can quickly transfer the heat to the phase change material for absorption, improve the heat dissipation effect, and achieve the effect of rapid cooling.

[0038] Furthermore, if Figures 1 to 7As shown, the injection hole 33 is a stepped hole, and the injection hole 33 includes a large-diameter threaded hole and a small-diameter hole sequentially opened in a direction close to the heat dissipation cavity 5. The internal thread of the large-diameter threaded hole is adapted to be equipped with a hard plug 34, and one end of the hard plug 34 is connected to a butyl rubber block 35. The butyl rubber block 35 rests on the step formed by the large-diameter threaded hole and the small-diameter hole. The hard plug 34 is provided with a pin hole 36 along its own axial direction, and the injection hole 33 is blocked by the hard plug 34. Since the hard plug 34 and the large-diameter threaded hole are connected by threads, the sealing between the hard plug 34 and the large-diameter threaded hole is not strong. For this reason, a butyl rubber block 35 is arranged on the hard plug 34. After the hard plug 34 is tightened into place, the butyl rubber block 35 5 is squeezed on the step formed by the large-diameter threaded hole and the small-diameter hole, so that the small-diameter hole is blocked by the butyl rubber block 35, thereby improving the sealing performance of the injection hole 33. In order to ensure the normal filling of the phase change material and facilitate the subsequent replenishment of the phase change material, a pin hole 36 is opened. The injection gun pierces the butyl rubber block 35 through the pin hole 36 and penetrates into the heat dissipation cavity 5, so as to fill the phase change material. After the filling is completed, the injection gun can be directly pulled out. The puncture entrance is automatically closed by the deformation of the butyl rubber block 35, so that the phase change material can be filled without removing the hard plug 34. The operation is simple, and during the filling process, the butyl rubber block 35 wraps the injection gun to ensure that there will be no omissions during the filling process.

[0039] Embodiment 2

[0040] Since the volume of the phase change material will also change after the shape changes, and the phase change material is injected in liquid form, the phase change material will cool into a solid state after filling. The volume of the phase change material will decrease after changing from liquid to solid, resulting in the phase change material being unable to contact the thin graphite sheet 4, affecting the rapid heat conduction of the thin graphite sheet 4. Therefore, based on the first embodiment, as Figures 1 to 8As shown, an elastic pad 8 is fixed to the bottom of the heat-conducting cavity 3, an L-shaped tube 9 is connected to the side wall of the lower shell 2, one end of the L-shaped tube 9 is connected to the heat dissipation cavity 5, a pressure sensor 10 is arranged at the end of the L-shaped tube 9 away from the lower shell 2, an elastic member is arranged in the L-shaped tube 9, a detection axis of the pressure sensor 10 penetrates into the L-shaped tube 9 and contacts the elastic member, the elastic member includes a piston 11, a spring 12 and a pressure plate 13, the piston 11 is adapted in the L-shaped tube 9 through its own deformation interference fit, the pressure plate 13 contacts the detection axis of the pressure sensor 10, the two ends of the spring 12 are respectively connected to the piston 11 and the pressure plate 13, the deformation strength of the spring 12 is greater than the deformation strength of the elastic pad 8, when the heat transfer space and the heat dissipation cavity 5 are filled with phase change material, the phase change material is continued to be injected. Since the deformation strength of the spring 12 is greater than the deformation strength of the elastic pad 8, the elastic pad 8 will first undergo compression deformation to increase the filling volume of the phase change material. The pressure in the heat dissipation cavity 5 acts on the piston 11, and the piston 11 will squeeze the spring 12. Under the reaction force of the spring 12, the pressure plate 13 will squeeze the detection axis of the pressure sensor 10. The filling condition of the phase change material is judged according to the pressure signal fed back by the pressure sensor 10. When the pressure detected by the pressure sensor 10 reaches the set value, the filling of the phase change material is stopped. At this time, the elastic pad 8 is in a compressed state. When the phase change material cools down, the elastic pad 8 will restore the deformation to adapt to the volume change of the phase change material, so that the phase change material can contact the thin graphite sheet 4 in the solid state to achieve better heat absorption.

[0041] Embodiment 3

[0042] Since the thin graphite sheet 4 is in the form of a thin sheet, it is squeezed by the phase change material for a long time, resulting in the thin graphite sheet 4 being broken after a long period of operation. At this time, in order not to affect the heat dissipation performance of the radiator, the damaged thin graphite sheet 4 needs to be replaced. Therefore, it is necessary to understand the operating status of the thin graphite sheet 4 in real time. For this purpose, based on the second embodiment, as shown in FIG. Figures 1 to 11As shown, an elastic support platform 14 is provided in the heat-conducting cavity 3, the outer wall of the elastic support platform 14 is fitted and connected to the inner wall of the heat-conducting cavity 3, the elastic support platform 14 is hollow, and the thin graphite sheet 4 is placed on the elastic support platform 14. A buffer gap is formed between the outer wall of the heat-conducting block 7 and the inner wall of the heat-conducting cavity 3, and a plurality of conduction paths 15 are provided in the heat-conducting block 7. One end of the conduction path 15 is conducted to the bottom of the heat-conducting block 7, and the other end is conducted from the side wall of the heat-conducting block 7 to the buffer gap. In order to ensure better heat transfer, the heat-conducting block 7 is arranged according to the size of the thin graphite sheet 4, so that the heat-conducting block 7 and the thin graphite sheet 4 have a larger contact area. , the heat generated by the heat source is transferred to the thin graphite sheet 4 through the upper shell 1 and the heat conductive block 7, and then the heat is transferred to the phase change material for absorption through the thin graphite sheet 4. The elastic support platform 14 is made of rubber material and has good elastic properties. The thin graphite sheet 4 is placed on the elastic support platform 14 and supported by the elastic support platform 14. After the upper shell 1 is connected to the lower shell 2, the heat conductive block 7 will contact the thin graphite sheet 4 to limit its freedom of movement in the thickness direction. Since the phase change material needs to be filled in the heat transfer space at high pressure, it will squeeze the elastic pad 8 and the elastic support platform 14 to deform, and the phase change material will push the elastic support platform 14 close to the The thin graphite sheet 4 is squeezed so that the position of the thin graphite sheet 4 is limited between the elastic support platform 14 and the heat conductive block 7, and at the same time, a high-strength sealing surface is provided between the elastic support platform 14 and the thin graphite sheet 4 to prevent the phase change material from entering the buffer gap and changing the high-pressure environment in other heat transfer spaces. When the thin graphite sheet 4 is broken, the phase change material absorbs heat and liquefies, passes through the thin graphite sheet 4, and then enters the buffer gap through the conductive path 15, thereby reducing the pressure in the heat dissipation cavity 5. At this time, under the reaction force of the spring 12, the spring 12 drives the piston 11 to move away from the pressure plate 13 to reset, so that the pressure sensor 1 0 can detect the signal of pressure reduction and determine that the thin graphite sheet 4 is damaged, so that the operating status of the thin graphite sheet 4 can be monitored in real time according to the pressure signal fed back by the pressure sensor 10, so as to facilitate the timely disassembly of the upper shell 1 and the lower shell 2 to replace the thin graphite sheet 4. When replacing, it is necessary to deal with the deformation material in the heat conduction cavity 3 accordingly, and use hot melting to deal with the phase change material on and above the elastic support platform 14, and then install a new thin graphite sheet 4, and then connect the upper shell 1 and the lower shell 2. Finally, according to the pressure signal of the pressure sensor 10, the corresponding amount of phase change material is supplemented through the injection hole 33.

[0043] Embodiment 4

[0044] In order to prevent the gap between the thin graphite sheet 4 and the lower shell 2 from affecting the heat transfer efficiency, preferably, the thin graphite sheet 4 is installed in the heat conduction cavity 3 with interference fit, so that the outer edge of the thin graphite sheet 4 contacts the lower shell 2, so that the heat can be transferred to the aluminum alloy structural member of the radiator to achieve a high thermal conductivity effect. Since the thin graphite sheet 4 adopts a thin sheet structure, interference fit installation is likely to cause damage to the thin graphite sheet. Therefore, based on the third embodiment, as shown in FIG. Figures 1 to 11 As shown, the four side walls of the heat-conducting cavity 3 are all provided with heat-conducting grooves 16, and a metal heat-conducting sheet 17 is slidably arranged in the heat-conducting groove 16. One end of the metal heat-conducting sheet 17 extends from the heat-conducting groove 16 to contact the top surface of the thin graphite sheet 4, and the heat-conducting groove 16 extends to the top surface of the lower shell 2. The shape of the heat-conducting groove 16 is L-shaped, and a heat-conducting wedge block 18 is slidably arranged in the heat-conducting groove 16. The heat-conducting wedge block 18 moves in the horizontal direction. One end of the metal heat-conducting sheet 17 is connected to the heat-conducting wedge block 18. A downward pressure rod 19 is slidably adapted in the heat-conducting groove 16, and the downward pressure rod 19 moves in the vertical direction. The top of the block 18 away from the end of the metal heat conductive sheet 17 is provided with a wedge-shaped surface 20, and the wedge-shaped surface 20 is located on the moving path of the lower pressure rod 19. When the upper shell 1 and the lower shell 2 are connected together, the lower pressure rod 19 contacts the upper shell 1, and the metal heat conductive sheet 17 extends from the heat conductive groove 16 to contact the thin graphite sheet 4. The metal heat conductive sheet 17 is initially located in the heat conductive groove 16. At this time, the top of the lower pressure rod 19 extends from the top surface of the lower shell 2. After the thin graphite sheet 4 is placed on the elastic support platform 14, the upper shell 1 is connected to the lower shell 2, and the upper shell 1 will press down the lower pressure rod 19, and the lower pressure rod 19 The wedge-shaped surface 20 of the metal heat conductive sheet 17 is squeezed, and under the action of the wedge-shaped surface 20, the heat conductive wedge block 18 drives the metal heat conductive sheet 17 to move close to the thin graphite sheet 4, so that the metal heat conductive sheet 17 extends from the heat conductive groove 16 to contact the top surface of the thin graphite sheet 4. At this time, the lower pressing rod 19 is completely located in the heat conductive groove 16, so that the thin graphite sheet 4 indirectly contacts the lower shell 2 through the metal heat conductive sheet 17, and the thin graphite sheet 4 indirectly contacts the upper shell 1 through the heat conductive block 7, so that the thin graphite sheet 4 can efficiently transfer heat to the aluminum alloy structural member of the radiator, reducing the temperature of the structural member itself. The difference improves the heat dissipation effect; when replacing the thin graphite sheet, after removing the upper shell 1, the metal heat conductive sheet 17 is inserted into the heat conductive groove 16, so that the heat conductive wedge block 18 pushes the lower pressure rod 19 to move upward and reset, and a new thin graphite sheet 4 is completed; the lower pressure rod 19, the heat conductive wedge block 18 and the metal heat conductive sheet 17 are all made of aluminum alloy material, which has good thermal conductivity; it is worth noting that the edge position of the metal heat conductive sheet 17 contacts the thin graphite sheet 4 and is not released from the heat conductive block 7, so that the heat conductive block 7 can smoothly contact the top surface of the thin graphite sheet 4, so that it is indirectly in contact with the upper shell 1.

[0045] Furthermore, the metal heat conductive sheet 17 includes a transfer portion 21 and a contact portion 22. The heat conductive wedge block 18 is connected to an elastic sealing block 23. The elastic sealing block 23 is provided with a horizontal groove 24 at one end close to the heat conductive wedge block 18. A notch 25 is provided at the bottom of the elastic sealing block 23. The notch 25 is connected to the horizontal groove 24. The contact portion 22 is embedded in the notch 25. The transfer portion 21 penetrates from the horizontal groove 24 to connect the contact portion 22. In order to prevent the phase change material from entering the conductive sheet 4 when the thin graphite sheet 4 is damaged, An elastic sealing block 23 is provided in the heat groove 16. The elastic sealing block 23 is made of rubber material and is interference fit in the bottom outlet of the heat-conducting groove 16. The contact portion 22 is embedded in the groove 25 so that the contact portion 22 can contact the thin graphite sheet 4 for heat transfer. Through the deformation of the elastic sealing block 23, the outer wall of the elastic sealing block 23 is tightly attached to the inner wall of the bottom opening of the heat-conducting groove 16 to form a high-strength sealing surface, so that after the thin graphite sheet 4 is broken, the phase change material will not enter the heat-conducting groove 16.

[0046] Embodiment 5

[0047] Since the thin graphite sheet 4 needs to be replaced later, the upper shell 1 and the lower shell 2 need to be disassembled. In order to improve the disassembly efficiency of the upper shell 1 and the lower shell 2, based on the fourth embodiment, as shown in FIG. Figures 1 to 14As shown, the four corners of the bottom of the upper shell 1 are fixed with a plug rod 26, the cross-sectional shape of the plug rod 26 is rectangular, the side wall of the plug rod 26 is connected with an elastic sheet 27, the elastic sheet 27 is transitionally connected to the bottom arc of the plug rod 26, and the angle between the elastic sheet 27 and the plug rod 26 is an acute angle. A rectangular groove 28 is provided at the top surface of the lower shell 2 corresponding to the plug rod 26, and a vertical groove 29 is provided on the side wall of the rectangular groove 28 near the edge of the lower shell 2. The lower shell 2 is connected to the bottom of the vertical groove 29 to form a limiting groove 30, and the plug rod 26 is slidably adapted to the rectangular groove 28, the top of the elastic sheet 27 is against the step formed by the vertical groove 29 and the limiting groove 30, a sealing ring 31 is fixed to the bottom of the upper shell 1, and an annular sealing groove 32 is opened on the top of the lower shell 2. The heat conduction cavity 3 and the heat dissipation cavity 5 are both located in the annular sealing groove 32. The depth of the annular sealing groove 32 is less than the axial length of the sealing ring 31. The sealing ring 31 is interference fitted in the annular sealing groove 32. The limiting groove 30 passes through the side wall of the lower shell 2. When assembling the upper shell 1 and the lower shell 2, the plug-in rod 26 of the upper shell 1 is inserted into the rectangular groove 28 of the lower shell 2. During the process of inserting the rod 26 into the rectangular groove 28, the connecting end of the elastic sheet 27 and the plug-in rod 26 is first inserted into the vertical groove 29. As the plug-in rod 26 is inserted, the elastic sheet 27 will be squeezed and deformed close to the plug-in rod 26, so that the elastic sheet 27 can be smoothly inserted into the vertical groove 29. At the same time, the sealing ring 31 is inserted into the annular sealing groove 32. Since the depth of the annular sealing groove 32 is less than the axial length of the sealing ring 31, when the upper shell 1 and the lower shell 2 are assembled, the top of the elastic sheet 27 moves to the bottom of the vertical groove 29, so that the elastic sheet 27 recovers to the bottom of the vertical groove 29 under its own elastic action. The elastic sheet 27 is pressed against the inner top wall of the limiting groove 30. At the same time, the sealing ring 31 is compressed and deformed to be interference-fitted in the annular sealing groove 32. The reaction force of the sealing ring 31 causes the elastic sheet 27 to press against the inner top wall of the limiting groove 30. The cooperation between the plug-in rod 26 and the rectangular groove 28 limits the horizontal freedom between the upper shell 1 and the lower shell 2. The elastic sheet 27 is pressed against the inner top wall of the limiting groove 30, limiting the vertical freedom between the upper shell 1 and the lower shell 2, making the connection between the upper shell 1 and the lower shell 2 more stable.Since the sealing ring 31 is interference-fitted in the annular sealing groove 32 to form a high-strength sealing surface, the upper shell 1 and the lower shell 2 have a strong sealing performance. The radiator is equipped with two disassembly plates, and the two disassembly plates are fixed with protrusions at the positions corresponding to the limit grooves 30. When the upper shell 1 and the lower shell 2 need to be disassembled, the two disassembly plates are pressed on both sides of the radiator at the same time, so that the protrusions are inserted into the limit grooves 30, and the elastic sheet 27 is squeezed by the protrusions to deform close to the plug rod 26, so that the elastic sheet 27 is separated from the limit groove 30. Under the reaction force of the sealing ring 31, the upper shell 1 carries the plug rod 26 and moves upward for a distance, so that the elastic sheet 27 is squeezed into the vertical groove 29. At this time, the disassembly plate is removed, and the upper shell 1 and the lower shell 2 can be directly separated, realizing rapid disassembly, which is equivalent to the connection method of screws and has a high disassembly and assembly efficiency. ;

Claims

1. A graphite temperature-uniform composite phase-change energy storage radiator, characterized in that: The invention comprises an upper shell (1) and a lower shell (2), wherein the lower shell (2) is provided with a plurality of heat-conducting cavities (3) on an end surface close to the upper shell (1), and the lower shell (2) is provided with heat-dissipating cavities (5) on both sides of the heat-conducting cavities (3), wherein a thin graphite sheet (4) is arranged in the heat-conducting cavity (3), and a heat transfer space is formed between the thin graphite sheet (4) and the bottom of the heat-conducting cavity (3), wherein the lower shell (2) is provided with a plurality of flow holes (6) on both side walls of the heat-conducting cavity (3), wherein the flow holes (6) are connected to the heat-dissipating cavity (5) on the same side, wherein the heat-dissipating cavity (5) is filled with a phase change material, and the phase change material is filled into the heat transfer space through the flow holes (6), and a heat-conducting block (7) is fixed on the bottom of the upper shell (1) corresponding to the thin graphite sheet (4), and the heat-conducting block (7) contacts the thin graphite sheet (4); An elastic pad (8) is fixed to the bottom of the heat-conducting cavity (3); an L-shaped tube (9) is connected to the side wall of the lower shell (2); one end of the L-shaped tube (9) is connected to the heat-dissipating cavity (5); a pressure sensor (10) is arranged at one end of the L-shaped tube (9) away from the lower shell (2); an elastic member is arranged inside the L-shaped tube (9); and a detection shaft of the pressure sensor (10) penetrates into the L-shaped tube (9) and contacts the elastic member; The elastic member comprises a piston (11), a spring (12) and a pressure plate (13); the piston (11) is fitted into the L-shaped tube (9) by means of its own deformation interference fit; the pressure plate (13) contacts the detection axis of the pressure sensor (10); and the two ends of the spring (12) are respectively connected to the piston (11) and the pressure plate (13); An elastic support platform (14) is arranged in the heat-conducting cavity (3), the outer wall of the elastic support platform (14) is closely connected to the inner wall of the heat-conducting cavity (3), the elastic support platform (14) is hollow, the thin graphite sheet (4) is placed on the elastic support platform (14), a buffer gap is formed between the outer wall of the heat-conducting block (7) and the inner wall of the heat-conducting cavity (3), a plurality of conducting paths (15) are provided in the heat-conducting block (7), one end of the conducting path (15) is connected to the bottom of the heat-conducting block (7), and the other end is connected to the buffer gap from the side wall of the heat-conducting block (7).

2. The graphite temperature-uniform composite phase-change energy storage radiator according to claim 1, characterized in that: The four side walls of the heat-conducting cavity (3) are each provided with a heat-conducting groove (16), a metal heat-conducting sheet (17) being slidably arranged in the heat-conducting groove (16), and one end of the metal heat-conducting sheet (17) extending out from the heat-conducting groove (16) to contact the top surface of the thin graphite sheet (4).

3. The graphite temperature-uniform composite phase-change energy storage radiator according to claim 2 is characterized in that: The heat-conducting groove (16) extends to the top surface of the lower shell (2), and the shape of the heat-conducting groove (16) is L-shaped. A heat-conducting wedge block (18) is slidably arranged in the heat-conducting groove (16), and the heat-conducting wedge block (18) moves in the horizontal direction. One end of the metal heat-conducting sheet (17) is connected to the heat-conducting wedge block (18). A downward pressure rod (19) is slidably adapted in the heat-conducting groove (16), and the downward pressure rod (19) moves in the vertical direction. A wedge surface (20) is provided at the top of one end of the heat-conducting wedge block (18) away from the metal heat-conducting sheet (17), and the wedge surface (20) is located on the moving path of the downward pressure rod (19). When the upper shell (1) and the lower shell (2) are connected together, the downward pressure rod (19) contacts the upper shell (1), and the metal heat-conducting sheet (17) extends out of the heat-conducting groove (16) to contact the thin graphite sheet (4).

4. The graphite temperature-uniform composite phase-change energy storage radiator according to claim 3 is characterized in that: The metal heat conducting sheet (17) comprises a transmission portion (21) and a contact portion (22); an elastic sealing block (23) is connected to the heat conducting wedge block (18); a horizontal groove (24) is formed at one end of the elastic sealing block (23) close to the heat conducting wedge block (18); a notch (25) is formed at the bottom of the elastic sealing block (23); the notch (25) is connected to the horizontal groove (24); the contact portion (22) is embedded in the notch (25); and the transmission portion (21) penetrates through the horizontal groove (24) to connect to the contact portion (22).

5. The graphite temperature-uniform composite phase-change energy storage radiator according to claim 1, characterized in that: A plug rod (26) is fixed at each of the four corners of the bottom of the upper shell (1); the plug rod (26) has a rectangular cross-sectional shape; an elastic sheet (27) is connected to the side wall of the plug rod (26); the elastic sheet (27) is transitionally connected to the bottom circular arc of the plug rod (26); the angle between the elastic sheet (27) and the plug rod (26) is an acute angle; a rectangular groove (28) is provided on the top surface of the lower shell (2) at a position corresponding to the plug rod (26); a vertical groove (29) is provided on the side wall of the rectangular groove (28) close to the edge of the lower shell (2); a limiting groove (30) is provided on the bottom of the lower shell (2) in communication with the vertical groove (29); the plug rod (26) is slidably adapted to fit into the rectangular groove (28); the top of the elastic sheet (27) abuts against a step formed by the vertical groove (29) and the limiting groove (30).

6. The graphite temperature-uniform composite phase-change energy storage radiator according to claim 5, characterized in that: A sealing ring (31) is fixed to the bottom of the upper shell (1), an annular sealing groove (32) is provided at the top of the lower shell (2), the heat conduction cavity (3) and the heat dissipation cavity (5) are both located in the annular sealing groove (32), the depth of the annular sealing groove (32) is less than the axial length of the sealing ring (31), the sealing ring (31) is interference-fitted in the annular sealing groove (32), and the limiting groove (30) passes through the side wall of the lower shell (2).

7. The graphite temperature-uniform composite phase-change energy storage radiator according to claim 1, characterized in that: The side wall of the lower shell (2) is provided with a liquid injection hole (33), the liquid injection hole (33) being connected to the heat dissipation cavity (5), the liquid injection hole (33) being a stepped hole, the liquid injection hole (33) comprising a large-diameter threaded hole and a small-diameter hole sequentially provided in a direction close to the heat dissipation cavity (5), the internal thread of the large-diameter threaded hole being adapted with a hard plug (34), one end of the hard plug (34) being connected with a butyl rubber block (35), the butyl rubber block (35) being against a step formed by the large-diameter threaded hole and the small-diameter hole, and the hard plug (34) being provided with a pin hole (36) penetrating along its own axial direction.

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