A plate heat pipe radiator

Abstract

The present invention discloses a plate heat pipe radiator, which includes a bottom plate, a heat transfer plate and at least one low-temperature startup plate. One side of the bottom plate has a horizontally arranged installation groove. The high-temperature sides of the heat transfer plate and the low-temperature startup plate are both connected to the bottom plate through the installation groove. The installation groove has a preset included angle with the horizontal plane so that the heat dissipation sides of the heat transfer plate and the low-temperature startup plate are higher than the high-temperature sides. The heat transfer plate and the low-temperature startup plate are respectively provided with a long heat transfer channel and a short heat transfer channel. Both the long heat transfer channel and the short heat transfer channel extend from the high-temperature side to the heat dissipation side, and the length of the short heat transfer channel is shorter than that of the long heat transfer channel. The heat pipe radiator is provided with a low-temperature startup plate. Since the length of the short heat transfer channel in the low-temperature startup plate is shorter, the temperature of its heat dissipation side is higher than that of the heat transfer plate. In a low-temperature environment, the low-temperature startup plate can still work normally, transfer heat to its heat dissipation side, play a heat dissipation role, and further enable the heat pipe radiator to still work normally in a low-temperature environment.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and particularly to a plate heat pipe radiator. Background Art

[0002] A low-temperature start-up test was carried out on a traditional heat pipe radiator. A simulated air-cooling test with a walking shape was carried out at an ambient temperature of -40°C, the air inlet speed was 4.5 m / s, the heat pipes on the inlet side could not start, and the heat pipes on the outlet side could not start at this temperature either. This test was carried out at an ambient temperature of -25°C, the inlet heat pipes could not start, and some of the heat pipes on the outlet could start. This test was carried out at an ambient temperature of -10°C, and all the heat pipes could start. It shows that the existing heat pipe radiators have certain limitations in use in low-temperature environments, especially at -40°C, there is a risk of failure.

[0003] Therefore, how to ensure the low-temperature environmental adaptability of the heat pipe radiator is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0004] The purpose of the present invention is to provide a plate heat pipe radiator, which is provided with a low-temperature start-up plate. The temperature of the heat transfer short channel in the low-temperature start-up plate drops less near the heat dissipation side, which can avoid the freezing of the starting working medium, and thus ensure the low-temperature environmental adaptability of the plate heat pipe radiator.

[0005] To achieve the above purpose, the present invention provides a plate heat pipe radiator, including a bottom plate, a heat transfer plate and at least one low-temperature start-up plate. One side of the bottom plate has a horizontally arranged installation groove. The high-temperature sides of the heat transfer plate and the low-temperature start-up plate are both connected to the bottom plate through the installation groove. The installation groove has a preset angle with the horizontal plane so that the heat dissipation sides of the heat transfer plate and the low-temperature start-up plate are higher than the high-temperature sides. The heat transfer plate and the low-temperature start-up plate are respectively provided with a heat transfer long channel and a heat transfer short channel. The heat transfer long channel and the heat transfer short channel both extend from the high-temperature side to the heat dissipation side, and the length of the heat transfer short channel is less than that of the heat transfer long channel.

[0006] Preferably, it further includes support fins. The support fins have insertion holes penetrating along the thickness direction. The heat transfer plate and the low-temperature start-up plate are connected to the support fins through the insertion holes.

[0007] Preferably, a folding edge for fitting with the side wall of the heat transfer plate or the low-temperature start-up plate is provided on the outer periphery of the insertion hole. The angle between the folding edge fitting with the upper and lower side walls of the heat transfer plate or the low-temperature start-up plate and the horizontal plane is equal to the preset angle.

[0008] Preferably, the value range of the preset angle is 0° to 10°.

[0009] Preferably, the length of the low-temperature starting plate is less than or equal to 1 / 2 of the length of the heat transfer plate, and the length of the short heat transfer channel is less than or equal to 1 / 2 of the length of the long heat transfer channel.

[0010] Preferably, a low-temperature starting cavity is formed in the low-temperature starting plate, and a plurality of support rib plates extending from the high-temperature side to the heat dissipation side are arranged in the low-temperature starting cavity. The support rib plates divide the low-temperature starting cavity to form the short heat transfer channels.

[0011] Preferably, the low-temperature starting cavity is a negative pressure cavity.

[0012] Preferably, a first preset distance is provided between the support rib plate and the inner side wall of the low-temperature starting cavity close to the high-temperature side to form a starting temperature equalizing cavity communicating with all the short heat transfer channels.

[0013] Preferably, a second preset distance is provided between the support rib plate and the inner side wall of the low-temperature starting cavity close to the heat dissipation side to form a steam mixing cavity communicating with all the short heat transfer channels.

[0014] Preferably, a starting capillary mechanism for increasing the transfer of the liquid working medium is provided on the inner side wall of the low-temperature starting cavity close to the high-temperature side.

[0015] The plate heat pipe radiator provided by the present invention includes a bottom plate, a heat transfer plate and at least one low-temperature starting plate. One side of the bottom plate has a horizontally arranged installation groove. The high-temperature sides of the heat transfer plate and the low-temperature starting plate are both connected to the bottom plate through the installation groove. A preset angle is provided between the installation groove and the horizontal plane so that the heat dissipation sides of the heat transfer plate and the low-temperature starting plate are higher than the high-temperature sides. The heat transfer plate and the low-temperature starting plate are respectively provided with long heat transfer channels and short heat transfer channels. The long heat transfer channels and the short heat transfer channels both extend from the high-temperature side to the heat dissipation side, and the length of the short heat transfer channels is less than that of the long heat transfer channels.

[0016] The farther away from the high-temperature side in the heat pipe, the lower the temperature. In the prior art, the plate heat pipe radiator often fails due to the icing of the working medium on the heat dissipation side in a low-temperature environment. In the plate heat pipe radiator in this application, a low-temperature starting plate is provided. Since the length of the short heat transfer channels in the low-temperature starting plate is short, the temperature of its heat dissipation side is higher than that of the heat transfer plate. In a low-temperature environment, the low-temperature starting plate can still work normally, transfer heat to its heat dissipation side, play a role in heat dissipation, and heat the heat transfer working medium in the heat transfer plate, so that the plate heat pipe radiator can still work normally in a low-temperature environment. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0018] Figure 1 Side view of the plate heat pipe radiator provided by the present invention;

[0019] Figure 2 For Figure 1 Enlarged view of I in

[0020] Figure 3 For Figure 1 Structural schematic diagram of the bottom plate in

[0021] Figure 4 For Figure 1 Structural schematic diagram of the heat transfer plate in

[0022] Figure 5 For Figure 4 View in the direction of II in

[0023] Figure 6 For Figure 5 View in the direction of III in

[0024] Figure 7 For Figure 1 Side view of the bottom plate in

[0025] Figure 8 For Figure 7 Enlarged view of IV in

[0026] Figure 9 For Figure 1 Structural schematic diagram of the low-temperature start-up plate in

[0027] Figure 10 For Figure 9 View in the direction of V in

[0028] Figure 11 For a specific embodiment of the present application Figure 10 View in the direction of VI in

[0029] Figure 12 For another specific embodiment of the present application Figure 10 View in the direction of VI in

[0030] Figure 13 For Figure 1 Side view of the low-temperature start-up plate in

[0031] Figure 14 For Figure 13Enlarged view of VII;

[0032] Figure 15 is Figure 1 Schematic structural diagram of the middle support plate;

[0033] Figure 16 is Figure 15 Side view of the middle support plate.

[0034] Among them, Figures 1 to 16 The reference numerals in are:

[0035] Bottom plate 1, heat transfer plate 2, low-temperature starting plate 3, support fins 4, installation groove 11, heat transfer and temperature equalizing cavity 21, heat transfer long channel 22, heat transfer rib plate 23, heat transfer capillary mechanism 24, heat transfer working medium 25, starting temperature equalizing cavity 31, heat transfer short channel 32, support rib plate 33, starting capillary mechanism 34, starting working medium 35, folding edge 41. Specific implementation manner

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0038] Please refer to Figures 1 to 16 .

[0039] The plate heat pipe radiator provided by the present invention has a structure as Figure 1As shown in the figure, it includes a bottom plate 1, a heat transfer plate 2 and at least one low-temperature start-up plate 3. The bottom plate 1 can be arranged in the vertical direction. One side surface of the bottom plate 1 is the heat source acting surface, and the heat source acting surface is closely attached to the equipment that needs to dissipate heat, playing a heat transfer role. The other side surface of the bottom plate 1 has a horizontally arranged installation groove 11. The heat transfer plate 2 and the low-temperature start-up plate 3 are both connected to the installation groove 11 by means of welding or interference fit. The side of the heat transfer plate 2 and the low-temperature start-up plate 3 that is connected to the installation groove 11 is the high-temperature side, and the side far from the high-temperature side is the heat dissipation side. When connecting, the gap between the heat transfer plate 2 or the low-temperature start-up plate 3 and the side wall of the installation groove 11 should be minimized to ensure good heat transfer effect between the heat transfer plate 2 or the low-temperature start-up plate 3 and the bottom plate 1. The heat transfer plate 2 has a heat transfer long channel 22 extending from the high-temperature side to the heat dissipation side, and the low-temperature start-up plate 3 has a heat transfer short channel 32 extending from the high-temperature side to the heat dissipation side. The heat transfer long channel 22 and the heat transfer short channel 32 are respectively filled with a heat transfer working medium 25 and a start-up working medium 35. At the same time, the heat transfer plate 2 and the low-temperature start-up plate 3 are inclined, and the height of the heat transfer long channel 22 and the heat transfer short channel 32 near the heat dissipation side is higher than that near the high-temperature side, and heat pipes are formed in the heat transfer long channel 22 and the heat transfer short channel 32. The working medium takes heat at the high-temperature side, vaporizes and flows to the heat dissipation side, and condenses and dissipates heat at the heat dissipation side. The selection of the heat transfer working medium 25 and the start-up working medium 35 can refer to the prior art, and the two can also use the same substance, which is not limited here.

[0040] The side wall of the installation groove 11 has a preset included angle with the horizontal plane, and the height of the side wall of the installation groove 11 near the groove opening is higher than that near the groove bottom. When the heat transfer plate 2 and the low-temperature start-up plate 3 are inserted into the installation groove 11, the side wall of the installation groove 11 supports the heat transfer plate 2 or the low-temperature start-up plate 3, so that the two are inclined, and the heat dissipation side of the two is higher than the high-temperature side. Therefore, the working medium can flow to the heat dissipation side after taking heat and vaporizing at the high-temperature side, and flow back to the high-temperature side after releasing heat and condensing at the heat dissipation side, realizing heat transfer. The heat transfer plate 2 and the low-temperature start-up plate 3 can both be rectangular, the length of the heat transfer plate 2 is greater than the length of the low-temperature start-up plate 3, and the length of the heat transfer long channel 22 is greater than the length of the heat transfer short channel 32.

[0041] Optionally, the length of the low-temperature start-up plate 3 can be less than or equal to 1 / 2 of the length of the heat transfer plate 2, and the length of the heat transfer short channel 32 can be less than or equal to 1 / 2 of the length of the heat transfer long channel 22. In the projection on the horizontal plane, the heat dissipation side of the low-temperature start-up plate 3 is located in the middle of the heat transfer plate 2. When the low-temperature start-up plate 3 dissipates heat, it will cause a temperature rise in the middle part of the heat transfer plate 2, thereby reducing the condensation of the heat transfer working medium 25 in the heat transfer plate 2 and ensuring that the heat transfer plate 2 can also start to work. Of course, the user can set the length of the low-temperature start-up plate 3 according to needs, which is not limited here.

[0042] Optionally, as Figure 1As shown, in a specific embodiment of the present application, the plate heat pipe radiator includes seven heat transfer plates 2 and five low-temperature startup plates 3. The top layer of the plate heat pipe radiator has two adjacent heat transfer plates 2, and one low-temperature startup plate 3 is provided between each pair of adjacent heat transfer plates 2. The heat transfer plates 2 and the low-temperature startup plates 3 are arranged alternately. One low-temperature startup plate 3 can transfer heat to the heat transfer plates 2 on both sides of it, enabling it to start normally in a low-temperature environment. Of course, users can also set the distribution method of the heat transfer plates 2 and the low-temperature startup plates 3 according to their needs, which is not limited here.

[0043] In addition, in this specific embodiment, the value range of the preset angle is 0° to 10°. Since the preset angle is relatively small, the working medium steam will slowly flow from the high-temperature side to the heat dissipation side along the long heat transfer channel 22 or the short heat transfer channel 32, so that the heat transfer plates 2 or the low-temperature startup plates 3 can be fully utilized for heat dissipation. In addition, the heat transfer plates 2 and the low-temperature startup plates 3 are arranged in parallel, so the distance between the two ends of the short heat transfer channel 32 is relatively small, making it easier for the working medium steam to flow to the heat dissipation side, and also enabling the low-temperature startup plate 3 to work normally in a low-temperature environment. Of course, users can also set the angle of the preset angle according to their needs, which is not limited here.

[0044] Optionally, the interior of the low-temperature startup plate 3 is a hollow structure, and a sealed low-temperature startup cavity is formed inside it. A plurality of support rib plates 33 are provided in the low-temperature startup cavity, and the support rib plates 33 extend from the side close to the high-temperature side to the heat dissipation side. At the same time, the upper and lower sides of the support rib plates 33 are respectively fixedly connected to the top surface and the bottom surface of the low-temperature startup cavity, so the support rib plates 33 divide the low-temperature startup cavity to form a plurality of short heat transfer channels 32.

[0045] In addition, the low-temperature startup cavity can be a negative pressure cavity. The boiling point of the startup working medium 35 decreases in a negative pressure environment, which can further ensure the effectiveness of the low-temperature startup cavity in a low-temperature environment. At the same time, the filling amount of the startup working medium 35 in the low-temperature startup plate 3 can also be reduced proportionally compared with that in the heat transfer plate 2. The manufacturing method of the low-temperature startup plate 3 can refer to the existing technology and will not be elaborated here.

[0046] The bottom plate 1, the heat transfer plates 2 and the low-temperature startup plates 3 are usually arranged along the direction parallel to the flow direction of the heat exchange air. The temperature at the heat exchange air inlet is relatively high, and the temperature at the outlet is relatively low. In a specific embodiment of the present application, to improve the temperature uniformity performance of the low-temperature startup plate 3, there is a first preset distance between the support rib plate 33 and the inner side wall of the low-temperature startup cavity close to the high-temperature side, and the support rib plate 33 is connected to the inner side wall of the low-temperature startup cavity close to the heat dissipation side. As Figure 11 shown, a startup temperature uniformity cavity 31 is formed between the support rib plate 33 and the high-temperature side. The startup temperature uniformity cavity 31 connects all the short heat transfer channels 32 close to the high-temperature side, and the working medium in all the short heat transfer channels 32 is mixed in the startup temperature uniformity cavity 31 to improve the temperature uniformity performance.

[0047] Furthermore, in a specific embodiment of the present application, asFigure 12 As shown, there is a first preset distance between the support rib plate 33 and the inner wall of the low-temperature starting cavity near the high-temperature side, so as to form a starting temperature equalization cavity 31 on the side of the low-temperature starting cavity near the high-temperature side; there is a second preset distance between the support rib plate 33 and the inner wall of the low-temperature starting cavity near the heat dissipation side, so as to form a steam mixing cavity on the side of the low-temperature starting cavity near the heat dissipation side that communicates with all the heat transfer short channels 32. The heat transfer long channels 22 and the heat transfer short channels 32 near the heat exchange air inlet are at a higher temperature, so the evaporation amount of the working medium is higher, and the pressure in the corresponding channels will also be higher. On the contrary, the pressure in the channels is lower. Under the action of the pressure difference, the working medium steam can flow along the steam mixing cavity towards the side near the heat exchange air outlet, and at the same time transfer heat to the heat exchange air outlet, further improving the temperature equalization performance.

[0048] Optionally, the inside of the heat transfer plate 2 is also a hollow structure and forms a sealed heat transfer cavity. The heat transfer cavity is divided by multiple heat transfer rib plates 23 to form multiple heat transfer long channels 22. In addition, there is a preset gap between the support rib plate 33 and the inner wall of the heat transfer cavity near the high-temperature side, so as to form a heat transfer temperature equalization cavity 21, and the heat transfer temperature equalization cavity 21 can improve the temperature equalization performance of the heat transfer plate 2. The structures of the heat transfer long channels 22 and the heat transfer temperature equalization cavity 21 can refer to the heat transfer short channels 32 and the starting temperature equalization cavity 31, and will not be elaborated here.

[0049] Furthermore, as Figure 14 shown, the inner wall of the low-temperature starting cavity near the high-temperature side is provided with a starting capillary mechanism 34. On the one hand, the starting capillary structure can increase the heat transfer area between the working medium and the side wall of the low-temperature starting plate 3. On the other hand, the capillary force of the starting capillary structure will make the working medium flow in the starting temperature equalization cavity 31, ensuring that the working medium is evenly distributed in the starting temperature equalization cavity 31. The starting capillary structure can specifically be multiple capillary grooves distributed from top to bottom on the inner wall of the low-temperature starting cavity near the high-temperature side, and the capillary grooves extend along the width direction of the low-temperature starting plate 3. Figure 14 Among them, the cross-section of the capillary groove is rectangular. Users can also set it as a trapezoidal groove, a triangular groove according to needs, or set a metal mesh on the inner wall of the low-temperature starting cavity near the high-temperature side as the starting capillary mechanism 34, which is not limited here. In addition, a heat transfer capillary mechanism 24 can also be set in the heat transfer cavity. As Figure 8 shown, the heat transfer capillary structure 24 can refer to the starting capillary mechanism 34, and will not be elaborated here.

[0050] Optionally, the plate heat pipe radiator further includes a support fin 4. As Figure 1 shown, the support fin 4 is parallel to the bottom plate 1. The support fin 4 has insertion holes penetrating along the thickness direction. The heat transfer plate 2 and the low-temperature starting plate 3 are connected to the support fin 4 through the insertion holes. Both the heat transfer plate 2 and the low-temperature starting plate 3 are in contact with the support fin 4, which can increase the heat dissipation area. In addition, the support fin 4 can support the heat transfer plate 2 and the low-temperature starting plate 3, improving the structural strength.

[0051] Optionally, a turned-up edge 41 is provided on the outer periphery of the inserted hole, as Figure 15 and Figure 16 shown. The turned-up edge 41 includes side edges that fit against both sides of the heat transfer plate 2 or the low-temperature starting plate 3, and a main edge that fits against the plate surface of the heat transfer plate 2 or the low-temperature starting plate 3. The angle between the main edge and the horizontal plane is equal to a preset angle. When inserting into the inserted hole, the heat transfer plate 2 or the low-temperature starting plate 3 is connected to the turned-up edge 41 by welding or interference fit. The turned-up edge 41 can increase the contact area between the heat transfer plate 2 or the low-temperature starting plate 3 and the support fins 4, thereby improving the heat transfer effect.

[0052] In this embodiment, a low-temperature starting plate 3 is provided in the plate heat pipe radiator. The low-temperature starting plate 3 shortens the length of the heat transfer channel, so it can still work normally in a low-temperature environment, improving the low-temperature adaptability of the plate heat pipe radiator. Temperature equalizing cavities are provided in both the heat transfer plate 2 and the low-temperature starting plate 3. The temperature equalizing cavities connect the heat transfer channels, improving the uniformity of the working fluid temperature, and thus improving the temperature equalizing performance of the plate heat pipe radiator. In addition, the heat transfer plate 2, the low-temperature starting plate 3, and the support fins 4 are all arranged along the direction parallel to the flow direction of the heat exchange air, reducing the thermal resistance of the plate heat pipe radiator and further improving the heat dissipation performance of the plate heat pipe radiator.

[0053] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0054] The above has introduced the plate heat pipe radiator provided by the present invention in detail. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A plate heat pipe radiator, characterized in that, It includes a bottom plate (1), a heat transfer plate (2) and at least one low-temperature starting plate (3). One side of the bottom plate (1) has a horizontally arranged mounting groove (11). The high-temperature sides of the heat transfer plate (2) and the low-temperature starting plate (3) are both connected to the bottom plate (1) through the mounting groove (11). The mounting groove (11) has a preset angle with the horizontal plane so that the heat dissipation sides of the heat transfer plate (2) and the low-temperature starting plate (3) are higher than the high-temperature sides. The heat transfer plate (2) and the low-temperature starting plate (3) are respectively provided with a heat transfer long channel (22) and a heat transfer short channel (32). The heat transfer long channel (22) and the heat transfer short channel (32) both extend from the high-temperature side to the heat dissipation side, and the length of the heat transfer short channel (32) is less than that of the heat transfer long channel (22). The low-temperature starting plate (3) has a low-temperature starting cavity inside. A plurality of support rib plates (33) extending from the high-temperature side to the heat dissipation side are arranged in the low-temperature starting cavity. The support rib plates (33) divide the low-temperature starting cavity to form the heat transfer short channel (32). There is a first preset distance between the support rib plate (33) and the inner side wall of the low-temperature starting cavity close to the high-temperature side to form a starting temperature equalizing cavity (31) communicating with all the heat transfer short channels (32). There is a second preset distance between the support rib plate (33) and the inner side wall of the low-temperature starting cavity close to the heat dissipation side to form a steam mixing cavity communicating with all the heat transfer short channels (32). The inner side wall of the low-temperature starting cavity close to the high-temperature side is provided with a starting capillary mechanism (34) for increasing the transfer of liquid working medium. The inside of the heat transfer plate (2) is a hollow structure and forms a sealed heat transfer cavity. A plurality of heat transfer rib plates (23) are arranged in the heat transfer cavity. There is a preset gap between the heat transfer rib plates (23) and the inner side wall of the heat transfer cavity close to the high-temperature side, thus forming a heat transfer temperature equalizing cavity (21).

2. The plate heat pipe radiator according to claim 1, wherein It further includes support fins (4). The support fins (4) have insertion holes penetrating along the thickness direction. The heat transfer plate (2) and the low-temperature starting plate (3) are connected to the support fins (4) through the insertion holes.

3. The plate heat pipe radiator according to claim 2, wherein, The outer periphery of the insertion hole is provided with a folding edge (41) for fitting with the side wall of the heat transfer plate (2) or the low-temperature starting plate (3). The angle between the folding edge (41) fitting with the upper and lower side walls of the heat transfer plate (2) or the low-temperature starting plate (3) and the horizontal plane is equal to the preset angle.

4. The plate heat pipe radiator according to claim 3, wherein, The value range of the preset angle is 0° to 10°.

5. The plate heat pipe radiator according to claim 4, characterized in that, The length of the low-temperature starting plate (3) is less than or equal to 1 / 2 of the length of the heat transfer plate (2), and the length of the heat transfer short channel (32) is less than or equal to 1 / 2 of the length of the heat transfer long channel (22).

6. The plate heat pipe radiator according to claim 1, characterized in that The low-temperature starting cavity is a negative pressure cavity.

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