A blown plate-fin combined phase change radiator

Abstract

The present invention provides a blown plate-fin combined phase change radiator, which includes a base plate, a cover plate, blown plate fins and a heat transfer working fluid. The evaporation cavity formed by the combination of the base plate and the cover plate serves as an evaporation heat absorption part for direct heat transfer. Moreover, there are a first groove, a second groove and a metal powder sintered capillary structure in the base plate, which increase the reflux of the heat transfer working fluid, enlarge the heat absorption and evaporation area, and improve the heat transfer capacity. The evaporation cavity is communicated with the condensation cavity in the blown plate fins. The evaporated gaseous heat transfer working fluid enters the condensation cavity to condense and release heat with a tiny pressure drop and temperature drop, and is dissipated through the heat exchange between the outer surface of the blown plate fins and the cooling air, enabling the radiator to have better heat transfer and better heat dissipation performance. The blown plate fins are provided with heat dissipation corrugated teeth to increase the heat dissipation area and improve the heat dissipation efficiency and heat dissipation capacity. Fixed columns are arranged on the base plate to strengthen the fixing strength between the base plate and the cover plate. Side plates are provided on the cover plate to protect the heat sink from external forces and damage, and improve the service life of the radiator.

Description

Technical Field

[0001] The present invention relates to the field of semiconductor heat dissipation, and particularly to an inflated plate-fin combined phase change radiator. Background Art

[0002] With the rapid development of laser semiconductor and electronic technologies, the integration degree of high-power components is getting higher and higher, the power density is also getting larger, and the heat generated during operation is getting greater. If the heat generated by the power device cannot be removed in time and quickly, the temperature of the chip in the power device will rise, which will cause a decrease in work efficiency and a shortening of the service life in the light case, and will directly lead to device damage and failure in the heavy case. Therefore, a radiator capable of efficient heat dissipation is needed to solve the heat dissipation problem of high-power devices.

[0003] There are two heat dissipation methods for laser modules: air cooling and water cooling. Since the fin efficiency of traditional air-cooled heat sinks is relatively low and the heat diffusion performance is poor, it can no longer meet the heat dissipation requirements of high heat flux density high-power modules. Therefore, water cooling is basically selected for current high-power laser modules because the noise of water cooling is smaller than that of air cooling, and the temperature control of water cooling is more accurate than that of air cooling, which can meet the cooling of fiber lasers, ultraviolet lasers, and CO2 radio frequency modules with different powers. However, using water cooling requires a large and heavy chiller unit to be equipped. Therefore, water-cooled radiators have problems such as complex systems, high costs, and occupying a large space.

[0004] Traditional and single heat dissipation methods have been difficult to meet the heat dissipation requirements of lasers. It is necessary to integrate multiple heat dissipation methods and optimize the radiator structure for application in lasers to improve the heat dissipation efficiency. Summary of the Invention

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide an inflated plate-fin combined phase change radiator, which is used to solve the problems of excessive weight and volume, complex structure, and large occupied space of the radiator in the prior art, and uses the property that the heat transfer working fluid absorbs heat during the phase change process while its own temperature remains unchanged to dissipate heat from the laser and improve the heat dissipation efficiency.

[0006] To achieve the above purpose and other related purposes, the present invention provides an inflated plate-fin combined phase change radiator, and the inflated plate-fin combined phase change radiator at least includes:

[0007] A cover plate, one end of the cover plate is provided with a steam rising pipeline interface penetrating through the cover plate, and the other end of the cover plate is correspondingly provided with a liquid return pipeline interface penetrating through the cover plate;

[0008] A substrate, the substrate is provided with an evaporation groove and a sintered metal powder capillary structure, the sintered metal powder capillary structure is laid on the bottom of the evaporation groove, the substrate is fixedly welded to the cover plate, the cover plate and the substrate form an evaporation cavity in combination with the evaporation groove, and the evaporation cavity is communicated with the steam rising pipeline interface and the liquid reflux pipeline interface;

[0009] An inflated plate fin, the inflated plate fin is fixed on the other side of the cover plate relative to the substrate, the inflated plate fin is provided with a condensation cavity, a steam rising communication pipe and a liquid reflux communication pipe, the condensation cavity, the steam rising communication pipe and the liquid reflux communication pipe are communicated with each other, and the steam rising communication pipe is correspondingly arranged and communicated with the steam rising pipeline interface, the liquid reflux communication pipe is correspondingly arranged and communicated with the liquid reflux pipeline interface, and the condensation cavity and the evaporation cavity together form a mutually communicated sealed cavity;

[0010] A heat transfer working fluid, the heat transfer working fluid is filled in the sealed cavity formed by the evaporation cavity and the condensation cavity.

[0011] Preferably, a groove is provided at the bottom of the evaporation groove, and the sintered metal powder capillary structure extends and fills the groove.

[0012] Preferably, the groove includes a first groove and a second groove which are communicated with each other, the first groove is adjacent to the liquid reflux pipeline interface, and a plurality of protrusions are arranged at intervals in the same direction in the first groove, the second groove is a plurality of grooves distributed in the same direction, and the extending directions of the protrusions and the grooves are parallel to the connection line of the steam rising pipeline interface and the liquid reflux pipeline interface.

[0013] Preferably, side plates are further provided on both sides of the cover plate.

[0014] Preferably, fixing columns are further provided on the substrate, and the columns are located between the substrate and the cover plate.

[0015] Preferably, a plurality of installation grooves are provided on the cover plate, and the inflated plate fins are installed in the installation grooves.

[0016] Preferably, the steam rising communication pipe is located on the top side of the inflated plate fin, the liquid reflux communication pipe is located on the bottom side of the inflated plate fin, and the diameter of the steam rising communication pipe is greater than or equal to the diameter of the liquid reflux communication pipe.

[0017] Preferably, the number of the inflated plate fins is N, where N≥2.

[0018] Preferably, it further includes heat dissipation corrugated teeth, and the heat dissipation corrugated teeth are fixed on one side or both sides of the inflated plate fin.

[0019] Preferably, the blown plate fins are in a single-sided expansion form, a double-sided expansion form or a double-sided flat form.

[0020] As described above, a blown plate fin combined phase change radiator of the present invention has the following beneficial effects: The blown plate fin combined phase change radiator at least includes a base plate, a cover plate, blown plate fins and a heat transfer working fluid. The base plate, the cover plate and the plurality of blown plate fins form a sealed cavity. The heat transfer working fluid circulates in the sealed cavity in different forms to form a blown plate fin combined phase change radiator with phase change heat transfer. The base plate is provided with an evaporation groove and a metal powder sintered capillary structure, so that the base plate and the cover plate are combined as the evaporation heat absorption part of the blown plate fin combined phase change radiator, and are fixedly connected to the heat generating power device for direct heat transfer, improving the heat transfer capacity. Since the evaporation cavity is communicated with the condensation cavity, the gaseous heat transfer working fluid in the evaporation cavity enters the condensation cavity with a small pressure drop and temperature drop, condenses and liquefies in the condensation cavity to release heat, and exchanges heat with the flowing cooling air through the outer surface of the blown plate fins, dissipating the heat to the surrounding environment, reducing the heat transfer resistance between the radiator base plate and the heat dissipation fins, increasing the temperature of the blown plate fins, increasing the temperature difference between the surface of the blown plate fins and the ambient temperature, increasing the heat dissipation per unit area of the blown plate fins, improving the utilization efficiency of the blown plate fins, and making the blown plate fin combined phase change radiator have a smaller volume and a larger heat dissipation capacity. Compared with other radiators, the blown plate fin combined phase change radiator does not require additional equipment or treatment, has the characteristics of small volume and light weight, simple structure and low cost, and conforms to the current trend of energy conservation and emission reduction.

[0021] Furthermore, the evaporation groove is further provided with a groove including a first groove and a second groove which are communicated with each other, and a plurality of protrusions are arranged at intervals in the same direction in the first groove. The metal powder sintered capillary structure extends and fills the groove. The combination of the groove and the metal powder sintered capillary structure effectively increases the cross-sectional area of the heat transfer working fluid flow channel and the evaporation area of the heat transfer working fluid, strengthens the boiling heat transfer, reduces the heat transfer resistance and the heat transfer temperature difference of evaporation heat absorption, increases the capillary force on the reflux liquid heat transfer working fluid, increases the return flow of the liquid heat transfer working fluid, avoids the phenomenon of dry burning, and ensures the stability of the heat dissipation efficiency of the blown plate fin combined phase change radiator while improving the heat transfer capacity. The blown plate fins are also provided with heat dissipation corrugated teeth, increasing the heat dissipation area for heat exchange between the blown plate fins and the cooling air, and improving the heat dissipation capacity and heat dissipation efficiency of the blown plate fin combined phase change radiator.

[0022] Meanwhile, fixing columns are also arranged on the substrate, and the columns strengthen the fixing strength between the substrate and the cover plate, improving the safety and reliability of the use of the blown plate-fin combined phase change radiator; side plates are also arranged on the cover plate to protect the fins from external forces and damage, and to extend the service life of the blown plate-fin combined phase change radiator. Brief Description of the Drawings

[0023] Figure 1 It shows a schematic structural diagram of the blown plate-fin combined phase change radiator in an embodiment of the present invention.

[0024] Figure 2 It shows a schematic diagram of the heat dissipation principle of the blown plate-fin combined phase change radiator in an embodiment of the present invention.

[0025] Figure 3 It shows Figure 1 an enlarged schematic structural diagram of area A in

[0026] Description of Component Labels

[0027] 100 Substrate

[0028] 110 Evaporation Groove

[0029] 111 First Groove

[0030] 112 Triangular Columnar Protrusion

[0031] 113 Second Groove

[0032] 114 Column

[0033] 115 Metal Powder Sintered Capillary Structure

[0034] 120 Evaporation Cavity

[0035] 200 Cover Plate

[0036] 210 Steam Rising Pipeline Interface

[0037] 220 Liquid Return Pipeline Interface

[0038] 230 Side Plate

[0039] 300 Blown Plate-Fin

[0040] 310 Steam Rising Connecting Pipe

[0041] 320 Liquid Return Connecting Pipe

[0042] 330 Condensation Cavity

[0043] 400 Heat Dissipation Corrugated Teeth Detailed Description of the Invention

[0044] The embodiments of the present invention are described below through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0045] When detailing the embodiments of the present invention, for ease of description, the cross-sectional views showing the device structure will be enlarged locally in a non-general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention here. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0046] For convenience of description, the following definitions are made: The end where the steam rising pipeline interface 210 and the liquid reflux pipeline interface 220 of the cover plate 200 are located is the wide side of the cover plate 200, and the other two sides are the long sides of the cover plate 200. Similarly, the length and width definitions of the substrate 100 are the same as those of the cover plate 200. The side of the blown plate fin 300 away from the cover plate 200 is the top side, and the side fixed on the cover plate 200 is the bottom side. The direction of the vertical connection line between the top side and the bottom side is the vertical direction.

[0047] It should be noted that the diagrams provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0048] As Figure 1 - Figure 2 shown, the present invention provides a blown plate fin combined phase change radiator, and the blown plate fin combined phase change radiator at least includes:

[0049] A cover plate 200, one end of the cover plate 200 is provided with a steam rising pipeline interface 210 penetrating through the cover plate, and the other end of the cover plate 200 is correspondingly provided with a liquid reflux pipeline interface 220 penetrating through the cover plate 200;

[0050] A substrate 100, the substrate 100 is provided with an evaporation groove 110 and a metal powder sintered capillary structure 115. The metal powder sintered capillary structure 115 is laid on the bottom of the evaporation groove 110. The substrate 100 is fixedly welded to the cover plate 200. The cover plate 200 and the substrate 100 combine the evaporation groove 110 to form an evaporation cavity 120, and the evaporation cavity 120 is communicated with the steam rising pipeline interface 210 and the liquid reflux pipeline interface 220;

[0051] The blown plate fin 300 is fixed to the other side of the cover plate 200 relative to the substrate 100. The blown plate fin 300 is provided with a condensation cavity 330, a steam rising communication pipe 310, and a liquid reflux communication pipe 320. The condensation cavity 330, the steam rising communication pipe 310, and the liquid reflux communication pipe 320 communicate with each other. The steam rising communication pipe 310 is correspondingly arranged and connected to the steam rising pipeline interface 210, and the liquid reflux communication pipe 320 is correspondingly arranged and connected to the liquid reflux pipeline interface 220. The condensation cavity 330 and the evaporation cavity 120 together form a mutually communicating sealed cavity;

[0052] A heat transfer working fluid is filled in the sealed cavity formed by the evaporation cavity 120 and the condensation cavity 330.

[0053] Specifically, in this embodiment, one end of the cover plate 200 is provided with a plurality of steam rising pipeline interfaces 210 that penetrate the cover plate 200 and are arranged at intervals in a straight line. The other end of the cover plate 200 is correspondingly provided with the same number of liquid reflux pipeline interfaces 220 that penetrate the cover plate 200 and are arranged at intervals in a straight line. Each steam rising pipeline interface 210 is vertically corresponding to the corresponding liquid reflux pipeline interface 220. Of course, if there are special needs, the connection line between each steam rising pipeline interface 210 and the corresponding liquid reflux pipeline interface 220 can also be any angle inclined line in the plane of the cover plate 200.

[0054] An evaporation groove 110 and a metal powder sintered capillary structure 115 are arranged in the substrate 100. The outer edge of the evaporation groove 110 forms a flange plate for fusing and sealing with the cover plate 200. The metal powder capillary structure 115 is laid on the bottom of the evaporation groove 110. The flange plate on the substrate 100 is welded and sealed to the cover plate 200, so that the cover plate 200 and the substrate 100 combine with the evaporation groove 110 to form an evaporation cavity 120. The evaporation cavity 120 communicates with the steam rising pipeline interface 210 and the liquid reflux pipeline interface 220.

[0055] The blown fin 300 is fixed to the other side of the cover plate 200 relative to the substrate 100 by welding or other means. The blown fin 300 is provided with blown channels, a steam rising communication pipe 310 and a liquid return communication pipe 320 that are in communication with each other, and the blown channels, the steam rising communication pipe 310 and the liquid return communication pipe 320 are also in communication with each other. The blown channels, as the subsequent condensation and liquefaction channels for the gaseous heat transfer medium, can also be referred to as the condensation cavity 330. The internal channels of the condensation cavity 330 are preferably parallel to each other in the vertical direction, so as to facilitate the rapid collection of the heat transfer medium after liquefaction. The steam rising communication pipe 310 is correspondingly arranged with the steam rising pipeline interface 210, and is located on the top side of the blown fin 300 at the end of the steam rising pipeline interface 210, and the steam rising communication pipe 310 is welded and communicated with the steam rising pipeline interface 210. The liquid return communication pipe 320 is correspondingly arranged with the liquid return pipeline interface 220, and is located on the bottom side of the blown fin 300 at the end of the liquid return pipeline interface 220, and the liquid return communication pipe 320 is welded and communicated with the liquid return pipeline interface 220. In this way, through the steam rising pipeline interface 210 and the liquid return pipeline interface 220, the evaporation cavity 120 is connected to the condensation cavity 330.

[0056] Specifically, after the welded assembly of the blown plate-fin combined phase change radiator is completed, the heat transfer working fluid is injected into the sealed cavity formed by the evaporation cavity 120 and the condensation cavity 330 through the liquid injection port reserved at the connection between the base plate 100 and the cover plate 200. After vacuum pumping, the liquid injection port is compacted and fused and sealed to prevent air from entering the sealed cavity. When the base plate 100 starts to be heated, the heat transfer working fluid in the evaporation cavity absorbs heat and evaporates into a gaseous heat transfer working fluid, which enters the condensation cavity 330 through the steam rising pipeline interface 210 and the liquid return pipeline interface 220. In the condensation cavity 330, as the temperature decreases, the gaseous heat transfer working fluid releases heat and condenses and liquefies back into a liquid heat transfer working fluid. Under the action of gravity, the liquid heat transfer working fluid gathers at the bottom side of the blown plate fins 300 and returns to the evaporation cavity 120 through the liquid return communication pipe 320 at the bottom side and the liquid return pipeline interface 220. Finally, the metal powder sintered capillary structure 115 in the evaporation cavity 120 diffuses the returned liquid heat transfer working fluid towards the steam rising pipeline interface 210 end, that is, disperses it throughout the evaporation cavity. Initially, the temperature of the blown plate fins 300 is low, and the liquefaction speed of the heat transfer working fluid is fast, so the liquid heat transfer working fluid at the bottom side of the blown plate fins 300 quickly gathers. When the height of the liquid heat transfer working fluid at the bottom side of the blown plate fins 300 is not lower than the height of the liquid return communication pipe 320, the gaseous heat transfer working fluid will not be able to enter the condensation cavity 330 through the liquid return pipeline interface 220. Under the influence of the internal pressure, the gaseous heat transfer working fluid will enter the condensation cavity 330 along the evaporation cavity 120 through the steam rising pipeline interface 210 and the steam rising communication pipe 310 of the blown plate fins 300, release heat and condense and liquefy to form a liquid heat transfer working fluid in the condensation cavity 330; the liquid heat transfer working fluid gathers at the bottom side of the blown plate fins 300 under the action of gravity, and then returns to the evaporation cavity 120 through the liquid return communication pipe 320 and the liquid return pipeline interface 220 and diffuses and returns towards the steam rising pipeline interface 210 end under the influence of the metal powder sintered capillary structure 115. At the same time, it also absorbs the heat generated when the heat generating power device fixed on the base plate works and continues to evaporate. In this way, the evaporation heat absorption and condensation heat release cycle is continuously carried out, continuously conducting the heat of the power device to the surface of the radiator fins and taking it away by the cooling air flowing through the surface of the radiator fins, so as to ensure the normal, safe and reliable operation of the electronic power device.

[0057] Since the substrate 100 is tightly connected to the heat-generating power device for direct heat conduction and forms an evaporation heat absorption part together with the cover plate 200, there is no need for other heat-smoothing components to cause indirect heat transfer with the heat source, thereby improving the heat transfer performance of the blown plate-fin combined phase change radiator. The evaporation cavity 120 is connected to the condensation cavity 330 through the vapor rising communication pipe 310 and the liquid reflux communication pipe 320. The gaseous heat transfer working medium in the evaporation cavity 120 enters the condensation cavity 330 with a small pressure drop and temperature drop, condenses and liquefies in the condensation cavity 330 to release heat, and exchanges heat with the flowing cooling air through the outer surface of the blown plate fins 300, dissipating the heat to the surrounding environment, reducing the thermal resistance of the radiator, further improving the heat transfer performance, increasing the temperature of the blown plate fins 300, and increasing the temperature difference between the blown plate fins 300 and the ambient temperature. As is well known, the greater the temperature difference, the greater the heat dissipation per unit area, and the higher the utilization efficiency of the blown plate fins 300, enabling the blown plate-fin combined phase change radiator to have better heat transfer and better heat dissipation performance. At the same time, compared with other radiators, the blown plate-fin combined phase change radiator has the characteristics of small volume, light weight, and simple structure, reducing the use of materials and conforming to the current trend of energy conservation and emission reduction.

[0058] As an example, the bottom of the evaporation groove 110 is provided with a groove, and the metal powder sintered capillary structure 115 extends and fills the groove.

[0059] Specifically, as Figure 2 , in this embodiment, the bottom of the evaporation groove 110 is provided with a groove, and the bottom of the metal powder sintered capillary structure 115 extends to the groove and fills the voids in the groove. The groove can not only effectively increase the cross-sectional area of the heat transfer working medium flow channel, but also provide capillary force for the heat transfer working medium flow. Combined with the metal powder sintered capillary structure 115 that provides driving force for the heat transfer working medium, the flow resistance of the heat transfer working medium is effectively reduced, and the heat transfer ability of the blown plate-fin combined phase change radiator is improved.

[0060] As an example, the groove includes a first groove 111 and a second groove 113 that are connected. The first groove 111 is adjacent to the liquid reflux pipeline interface 220, and a plurality of protrusions are arranged at intervals in the same direction in the first groove 111. The second groove 113 is a plurality of grooves distributed in the same direction, and the extending directions of the protrusions and the grooves are parallel to the connection line of the vapor rising pipeline interface 210 and the liquid reflux pipeline interface 220.

[0061] Specifically, as Figure 1, in this embodiment, the groove includes a first groove 111 and a second groove 113 that are connected and communicate with each other. Among them, the first groove 111 is adjacent to the liquid return pipeline interface 220, and a plurality of triangular columnar protrusions 112 are arranged in the first groove 111 at intervals in the same direction. The triangular columnar protrusions 112 can achieve a smaller structure and a smaller gap between adjacent triangular columnar protrusions 112. Therefore, the triangular columnar protrusions 112 effectively increase the cross-sectional area of the heat transfer working medium flow channel, increase the evaporation area of the heat transfer working medium, strengthen boiling heat transfer, reduce the thermal resistance of evaporation heat absorption and the heat transfer temperature difference, increase the capillary force on the reflux liquid heat transfer working medium, increase the return flow rate of the liquid heat transfer working medium, avoid the occurrence of dry burning phenomenon, improve the heat transfer ability, and ensure the stability of the heat dissipation efficiency of the blown plate-fin combined phase change radiator. The second groove 113 is a plurality of grooves distributed in the same direction. The second groove 113 communicates with the first groove 111 at the junction, and the extending directions of the triangular columnar protrusions 112 and the grooves are parallel to the connection line between the steam rising pipeline interface 210 and the liquid return pipeline interface 220, increasing the cross-sectional area of the heat transfer working medium flow channel, reducing the flow resistance of the heat transfer working medium, and improving the heat transfer ability.

[0062] In this embodiment, the plurality of protrusions arranged at intervals in the same direction in the first groove 111 are triangular columnar protrusions. In fact, it is not limited thereto. According to actual needs, it can be set as other polygonal protrusions such as squares, or other curved protrusions such as circles. There is no special limitation here to expand the application range of the blown plate-fin combined phase change radiator.

[0063] As an example, the width of the first groove 111 is the same as the width of the evaporation groove 110, and the spacing between adjacent protrusions is smaller than the spacing between adjacent grooves.

[0064] Specifically, as Figure 1 , in this embodiment, the width of the first groove 111 is the same as the width of the evaporation groove 110, which increases the distribution width of the triangular columnar protrusions 112 in the first groove 111. While increasing the cross-sectional area of the heat transfer working medium flow channel and the evaporation area, it also increases the return flow rate of the heat transfer working medium in the condensation cavity 330, improving the heat transfer ability and heat dissipation efficiency of the blown plate-fin combined phase change radiator. The spacing between adjacent triangular columnar protrusions 112 is smaller than the spacing between adjacent grooves. On the one hand, it increases the pressure near the liquid return pipeline interface 220 and speeds up the flow rate of the gaseous heat transfer working medium towards the steam rising pipeline interface 210; on the other hand, it effectively controls the evaporation rate of the heat transfer working medium near the steam rising pipeline interface 210 so that it is not greater than the return flow rate of the heat transfer working medium, avoiding the occurrence of dry burning phenomenon and increasing the service life of the blown plate-fin combined phase change radiator.

[0065] As an example, side plates 230 are further provided on both sides of the cover plate 200.

[0066] Specifically, as Figure 1 , in this embodiment, side plates 230 are further provided on both sides of the cover plate 200. The side plates 230 are arranged relative to the blown plate fins 300. The side plates 230 are parallel and located outside the blown plate fins 300, and the perpendicular projection of the blown plate fins 300 relative to the side plates 230 is located within the side plates 230. In this way, the side plates 230 can effectively isolate the influence of external forces on the heat dissipation fins, prevent the heat dissipation fins from deforming due to external forces, and protect the blown plate fin combined phase change radiator.

[0067] As an example, fixing columns 114 are further provided on the substrate 100. The columns 114 are located between the substrate 100 and the cover plate 200.

[0068] Specifically, as Figure 1 , in this embodiment, fixing columns 114 are further provided on the substrate 100. The columns 114 are dispersedly located at the entire bottom of the evaporation groove 110. The columns 114, as the strengthening and fixing points between the substrate 100 and the cover plate 200, can increase the bonding force between the substrate 100 and the cover plate 200, resist the internal gas pressure, and maintain the sealing performance and the stability of the heat dissipation efficiency of the blown plate fin combined phase change radiator.

[0069] As an example, a plurality of mounting grooves (not shown) are provided on the cover plate 200, and the blown plate fins 300 are mounted in the mounting grooves.

[0070] Specifically, the cover plate 200 is provided with mounting grooves. The number of the mounting grooves is the same as the number of the blown plate fins 300. The blown plate fins 300 are detachably or fixedly mounted in the mounting grooves. In this way, the contact area between the blown plate fins 300 and the cover plate 200 is increased, the heat conduction effect is enhanced, and the temperature difference between the blown plate fins 300 and the substrate 100 is reduced.

[0071] As an example, the steam rising connecting pipe is located on the top side of the blown plate fin, the liquid reflux connecting pipe is located on the bottom side of the blown plate fin, and the diameter of the steam rising connecting pipe 310 is greater than or equal to the diameter of the liquid reflux connecting pipe 320, so that the gaseous heat transfer working medium heated and evaporated in the evaporation cavity 120 can enter the condensation cavity 330 through the steam rising connecting pipe 310 more, condense and release heat, reduce the gas pressure in the evaporation cavity, and improve the heat dissipation efficiency of the blown plate fin combined phase change radiator. The liquid reflux connecting pipe is located on the bottom side of the blown plate fin and appropriately reduces the diameter of the liquid reflux connecting pipe 320, which can increase the capillary force of the liquid heat transfer working medium reflux, reduce the reflux resistance, increase the reflux amount and reflux speed, and promote the good cycle of the blown plate fin combined phase change radiator.

[0072] As an example, the number of the blown plate fins 300 is N, where N≥2.

[0073] Specifically, as Figure 1 , in this embodiment, each blown plate fin 300 is connected to the evaporation cavity 120 through the steam rising connecting pipe 310, the liquid reflux connecting pipe 320, the steam rising pipeline interface 210 and the liquid reflux pipeline interface 220 of the cover plate 200. The adjacent blown plate fins 300 are not connected to each other, so as to increase the total surface area of the blown plate fins 300, increase the heat dissipation area and also increase the liquefaction speed of the gaseous heat transfer working medium, and improve the heat dissipation efficiency of the blown plate fin combined phase change radiator. In this embodiment, the number of the blown plate fins 300 is shown as 9, but in fact it is not limited thereto. The number of the blown plate fins 300 is greater than or equal to 2, and can be set to 3, 4, 5, 6, 7, 8, 10, etc. according to needs, and no special limitation is made here.

[0074] As an example, it further includes a heat dissipation corrugated tooth 400, and the heat dissipation corrugated tooth 400 is fixed on one side or both sides of the blown plate fin 300.

[0075] Specifically, as Figure 1, in this embodiment, in order to increase the heat dissipation area and heat dissipation capacity, heat dissipation corrugated teeth 400 are further provided on both sides of the blown plate fin 300. Due to its corrugated shape, the heat dissipation corrugated teeth 400 can greatly increase the heat dissipation area when the blown plate fin 300 exchanges heat with the cooling air, thereby improving the heat dissipation efficiency and heat dissipation capacity of the blown plate fin combined phase change radiator. In this embodiment, the heat dissipation corrugated teeth 400 are located on both sides of the blown plate fin 300, but in fact, it is not limited thereto. According to actual needs, the heat dissipation corrugated teeth 400 can also be located on one side of the blown plate fin 300. The distribution of the heat dissipation corrugated teeth 400 among different blown plate fins 300 can be the same or different, that is, they can be located on one side of the blown plate fin 300 together, or they can all be located on both sides of the blown plate fin 300, or there can be a coexistence of being located on one side and being located on both sides. When the heat dissipation corrugated teeth 400 are provided, the side plate 230 is located outside the heat dissipation corrugated teeth 400, which can provide protection for the heat dissipation corrugated teeth 400 and prevent the heat dissipation corrugated teeth 400 from being deformed by external forces and affecting the heat dissipation efficiency.

[0076] As an example, the blown plate fin 300 is in a single-sided expansion form, a double-sided expansion form or a double-sided flat form.

[0077] Specifically, the blown plate fin 300 is in a single-sided expansion form, a double-sided expansion form or a double-sided flat form. For the double-sided expansion form, since its surface is not a plane, the heat dissipation corrugated teeth 400 cannot be fitted and installed on this surface. Therefore, when there is no need to add the heat dissipation corrugated teeth 400 to increase the heat dissipation area, the double-sided expansion form can be adopted. When it is necessary to add the heat dissipation corrugated teeth 400, the single-sided expansion form or the double-sided flat form can be selected according to actual needs. The specific selection is based on requirements and is not particularly limited here to expand the application range of the blown plate fin combined phase change radiator.

[0078] In summary, a blown plate-fin combined phase change radiator of the present invention has the following beneficial effects: The blown plate-fin combined phase change radiator at least includes a base plate, a cover plate, blown plate fins and a heat transfer working fluid. The base plate, the cover plate and a plurality of the blown plate fins form a sealed cavity, and the heat transfer working fluid circulates in different forms in the sealed cavity to form a blown plate-fin combined phase change radiator with phase change heat transfer; The base plate is provided with an evaporation groove and a metal powder sintered capillary structure, so that the base plate and the cover plate are combined as the evaporation heat absorption part of the blown plate-fin combined phase change radiator, and are tightly connected to the heat generating power device for direct heat transfer, improving the heat transfer capacity; Since the evaporation cavity is communicated with the condensation cavity, the gaseous heat transfer working fluid in the evaporation cavity enters the condensation cavity with a small pressure drop and temperature drop, condenses and liquefies in the condensation cavity to release heat, and exchanges heat with the flowing cooling air through the outer surface of the blown plate fins, dissipating the heat to the surrounding environment, reducing the heat transfer resistance between the radiator base plate and the heat dissipation fins, increasing the temperature of the blown plate fins, increasing the temperature difference between the surface of the blown plate fins and the ambient temperature, increasing the heat dissipation per unit area of the blown plate fins, improving the utilization efficiency of the blown plate fins, and making the blown plate-fin combined phase change radiator have a smaller volume and a larger heat dissipation capacity. Compared with other radiators, the blown plate-fin combined phase change radiator does not require additional equipment or treatment, has the characteristics of small volume and light weight, simple structure and low cost, and conforms to the current trend of energy conservation and emission reduction.

[0079] Furthermore, the evaporation groove is also provided with a groove including a first groove and a second groove which are communicated, and a plurality of protrusions are arranged at intervals in the same direction in the first groove. The metal powder sintered capillary structure extends and fills the groove. The combination of the groove and the metal powder sintered capillary structure effectively increases the cross-sectional area of the heat transfer working fluid flow channel and the evaporation area of the heat transfer working fluid, strengthens the boiling heat transfer, reduces the heat transfer resistance and the heat transfer temperature difference of evaporation heat absorption, increases the capillary force on the reflux liquid heat transfer working fluid, increases the return flow of the liquid heat transfer working fluid, avoids the phenomenon of dry burning, improves the heat transfer capacity while ensuring the stability of the heat dissipation efficiency of the blown plate-fin combined phase change radiator. The blown plate fins are also provided with heat dissipation corrugated teeth to increase the heat dissipation area for heat exchange between the blown plate fins and the cooling air, and improve the heat dissipation capacity and heat dissipation efficiency of the blown plate-fin combined phase change radiator.

[0080] At the same time, fixed columns are also arranged on the base plate. The columns strengthen the fixing strength between the base plate and the cover plate, and improve the safety and reliability of the blown plate-fin combined phase change radiator during use; Side plates are also provided on the cover plate to protect the heat dissipation fins from external forces and damage, and improve the service life of the blown plate-fin combined phase change radiator.

[0081] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A blown plate-fin combined phase change radiator, characterized in that, The blown plate-fin combined phase change radiator at least includes: A cover plate, at one end of which there is a steam rising pipeline interface penetrating through the cover plate, and at the other end of the cover plate there is a liquid reflux pipeline interface correspondingly penetrating through the cover plate; A substrate, which is provided with an evaporation groove and a metal powder sintered capillary structure. The metal powder sintered capillary structure is laid on the bottom of the evaporation groove. The substrate is fixedly welded to the cover plate. The cover plate and the substrate combine the evaporation groove to form an evaporation cavity, and the evaporation cavity is communicated with the steam rising pipeline interface and the liquid reflux pipeline interface; A blown plate-fin, which is fixed to the other side of the cover plate relative to the substrate. The blown plate-fin is provided with a condensation cavity, a steam rising communication pipe and a liquid reflux communication pipe. The condensation cavity, the steam rising communication pipe and the liquid reflux communication pipe are mutually communicated. The steam rising communication pipe is correspondingly arranged and communicated with the steam rising pipeline interface, and the liquid reflux communication pipe is correspondingly arranged and communicated with the liquid reflux pipeline interface. The condensation cavity and the evaporation cavity together form a mutually communicated sealed cavity. The steam rising communication pipe is located on the top side of the blown plate-fin, and the liquid reflux communication pipe is located on the bottom side of the blown plate-fin. The diameter of the steam rising communication pipe is larger than the diameter of the liquid reflux communication pipe; A heat transfer working medium, which is filled in the sealed cavity formed by the evaporation cavity and the condensation cavity.

2. The blown plate-fin combined phase change radiator according to claim 1, characterized in that: A groove is arranged at the bottom of the evaporation groove, and the metal powder sintered capillary structure extends and fills the groove.

3. The blown plate-fin combined phase change radiator according to claim 2, characterized in that: The groove includes a first groove and a second groove that are communicated with each other. The first groove is adjacent to the liquid reflux pipeline interface, and a plurality of protrusions are arranged in the first groove at intervals in the same direction. The second groove is a plurality of grooves distributed in the same direction, and the extending directions of the protrusions and the grooves are parallel to the connection line of the steam rising pipeline interface and the liquid reflux pipeline interface.

4. The blown plate-fin combined phase change radiator according to claim 1, characterized in that: Side plates are also arranged on both sides of the cover plate.

5. The blown plate-fin combined phase change radiator according to claim 1, characterized in that: Fixed columns are also arranged on the substrate, and the columns are located between the substrate and the cover plate.

6. The blown plate-fin combined phase change radiator according to claim 1, characterized in that: A plurality of installation grooves are arranged on the cover plate, and the blown plate-fin is installed in the installation grooves.

7. The blown plate-fin combined phase change radiator according to claim 1, characterized in that: The number of the blown plate-fins is N, where N≥2.

8. The blown plate-fin combined phase change radiator according to claim 1, characterized in that: It also includes heat dissipation corrugated teeth, which are fixed to one side or both sides of the blown plate-fin.

9. The blown plate-fin combined phase change radiator according to claim 1, characterized in that: The blown plate-fin is in a single-sided expansion form, a double-sided expansion form or a double-sided flat form.

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