DE112017000646T5 - Air cooled plate rib phase change radiator with composite capillary grooves - Google Patents

Abstract

The present invention discloses an air-cooled plate rib phase change radiator with composite capillary grooves, comprising a heat exchange tank and a base plate in which a base plate interior (3) is provided for receiving the working medium. Within the heat exchanger tank, coolant channels (10) and phase change channels (6) are alternately arranged, wherein cooling fins I (11) are provided in the coolant channels (10), the heat exchange tank being mounted on the base plate such that the phase change channels (6) are connected to the base plate -Interraum (3) are connected and together forms a tightly closed phase change heat exchange chamber. Grooves (5) are arranged on the inner wall of phase change channels (6) and within the phase change channels (6) cooling fins II (7) or metal fiber felts are provided, wherein capillary channels are arranged on the inner wall of the base plate interior (3).

Description

Technical area

The invention relates to a radiator, in particular an air-cooled plate rib phase change radiator with composite capillary grooves.

State of the art

Among the technologies for improving domestic and foreign heat transfer, many efficient phase change heat transfer technologies are being developed based on the high heat transfer coefficient and the uniform temperature of vapor condensation and boiling evaporation of the liquid. Although great success has been achieved in reducing boiler exhaust gas temperature and recycling waste heat to improve heat efficiency, hot air cooling applications are rarely reported. From the current research on phase change heat exchangers, the reflux rate of phase change working fluid is an important factor influencing heat transfer efficiency.

Disclosure of the invention

It is an object of the present invention to provide an air-cooled plate rib phase change radiator with composite capillary grooves on the above problems. According to the invention, the following technical measures are adopted:

An air-cooled plate rib phase change radiator with composite capillary grooves comprises a heat exchanger tank and a base plate in which a base plate interior is provided for receiving a working medium. Within the heat exchanger tank coolant channels and phase change channels are arranged alternately, wherein cooling fins I are provided in the coolant channels. The heat exchange tank is mounted on the base plate such that the phase change channels are connected to the base plate interior and together form a tightly closed phase change heat exchange chamber. Grooves are disposed on the inner wall of phase change channels and within the phase change channels cooling fins II or metal fiber felts are provided. Capillary channels are arranged on the inner wall of the base plate interior.

Further, the cooling fins II are rectangular staggered-toothed fins or flat sine-wave staggered-toothed fins or triangular corrugated fins. The cooling fins I are also rectangular staggered-toothed ribs or flat sine wave-shaped staggered-toothed ribs or triangular corrugated ribs. The capillary channels are metal fiber felts and are regular or irregular pores with an equivalent diameter of 0.001-2 mm. The porosity of the capillary channels is 60% - 90%.

Further, the base plate includes an upper cover base plate and a lower cover base plate. Both the upper cover base plate and the lower cover base plate are provided with metal fiber felts on the inner walls thereof. In the upper cover base plate, strip-shaped through holes are arranged to connect the base plate interior with the phase change channels.

Further, a support structure which is a support pillar or a support rib is provided between the upper cover base plate and the lower cover base plate. Metal fiber felt is attached to the outer wall of the support structure.

Further, the cooling fins I are rectangular staggered-toothed fins having a thickness of 0.05 - 0.5 mm. The wave pitch of the rectangular staggered-toothed shafts of cooling fins I is 3 ~ 15 mm, and the wave height is 2 - 30 mm. The opening width of the rectangular staggered tooth gaps is between 0.5 mm and one quarter of the wave pitch.

Further, the grooves having a width and a depth of 0.1 to 1.5 mm are connected to the pores of the capillary channels.

Further, the phase change channel is surrounded by two parallel partition walls and lateral sealing bands, the side sealing bands being provided at both ends of the partition wall. The phase change channel is sealed at its top with an upper sealing band. On the phase change channel facing side of both the partition and the sealing strip grooves are arranged.

Furthermore, the cooling fins I are clamped between the partitions on both sides of the coolant channel. At the upper and lower ends of the coolant channel airtight bands are provided and on both sides of the heat exchanger tank side fenders are provided.

Further, the base material for the phase change radiator is aluminum, aluminum alloy, copper or copper alloy.

• 1.Phasenänderung des Arbeitsmediums wird verwendet, um eine schnelle Wärmeübertragung zu realisieren und eine hohe Wärmeübertragungseffizienz zu erzielen;
• 2.Luftgekühlte Wärmeabfuhr, die auf die Rippen mit einer Sinus-Rechteckwellen-Verbundstruktur basiert, realisiert eine effiziente Wärmeabfuhr, ohne Wassertank vorzusehen;
• 3. Eine hoch integrierte kompakte Anordnung von beabstandeten Kühlrippen I-Phasenänderungskanal führt dazu, dass der Bauraum wirksam gespart wird. Die Größe und die Anzahl der Phasenänderungskanäle sind einstellbar. Der Wärmetauscher hat einen breiten anwendbaren Leistungsbereich.
• 4. Eine Verbundstruktur von Rillen und gestaffelten-verzahnten Rippen ist im Phasenänderungskanal angeordnet, was die Wärmeaustauschfläche sehr stark vergrößert, so dass das Arbeitsmedium zum Wärmeaustausch am Wärmeabfuhrsende schnell kondensiert wird und unter der Doppelwirkung von Schwerkraft und Kapillarfähigkeitein schneller Rückfluss in der rechteckigen gestaffelten-verzahnten Rippenfläche und in der Kapillarrille erreicht wird.
• 5. Der gesinterte Metallfaserfilz in dem Innenraum kann dem Arbeitsmedium bei Rückfluss helfen und verhindert, dass das Arbeitsmedium zur Trockene verdampft wird. Außerdem ermöglicht der Metallfaserfilz, dass das flüssige Arbeitsmedium gleichmäßig auf der gesamten Innenraumoberfläche verteilt ist, wodurch die gleichmäßige Temperatur auf der Grundplatte erzielt wird.
• 6. Die Stützsäule oder die Stützrippe ist im Innenraum der Grundplatte angebracht, was effektiv verhindert, dass sich der Innenraum der Grundplatte verformt. Außerdem kann der Rückfluss von Arbeitsmedium beschleunigt werden, indem ein Hilfsfaserfilz auf der Oberfläche der Stützsäule oder der Stützrippe angeordnet ist.

Compared to the prior art, the air-cooled plate rib according to the invention has Phase change radiator with composite capillary grooves the following advantages:

• 1. Phase change of the working medium is used to realize rapid heat transfer and achieve high heat transfer efficiency;
• 2. Air-cooled heat dissipation based on the ribs with a sine-square wave composite structure realizes efficient heat dissipation without providing water tank;
• 3. A highly integrated compact arrangement of spaced cooling fins I-phase change channel leads to the fact that the space is effectively saved. The size and the number of phase change channels are adjustable. The heat exchanger has a wide applicable power range.
• 4. A composite structure of grooves and staggered-serrated ribs is located in the phase change channel, greatly increasing the heat exchange area so that the working medium is rapidly condensed to heat exchange at the heat removal end and under the dual action of gravity and capillary capability a fast reflux in the rectangular staggered-toothed one Rib surface and in the capillary groove is achieved.
• 5. The sintered metal fiber felt in the interior can help the working fluid at reflux and prevents the working fluid from evaporating to dryness. In addition, the metal fiber felt allows the liquid working fluid to be uniformly distributed over the entire interior surface, thereby achieving the uniform temperature on the base plate.
• 6. The support column or support rib is mounted in the interior of the base plate, which effectively prevents the interior of the base plate from deforming. In addition, the return flow of working medium can be accelerated by an auxiliary fiber felt on the surface of the support column or the support rib is arranged.

list of figures

• 1 schematically shows the structure of an embodiment of the present invention;
• 2a schematically shows the internal structure of the phase change channel according to the embodiment of the present invention (rectangular staggered-toothed ribs);
• 2 B schematically shows the internal structure of the phase change channel according to the embodiment of the present invention (flat sine wave-shaped staggered-toothed ribs);
• 2c schematically shows the internal structure of the phase change channel according to the embodiment of the present invention (triangular corrugated fins);
• 3 schematically shows the structure of the base plate according to the embodiment of the present invention;
• 4 schematically shows the top view of the embodiment of the present invention;
• 5 schematically shows the structure of the flat sine wave-shaped staggered-toothed ribs according to the embodiment of the present invention;
• 6 schematically shows the three-dimensional structure of the rectangular staggered-toothed ribs according to the embodiment of the present invention.

Detailed embodiments

Referring to 1 to 6 For example, an air cooled plate rib phase change radiator with composite capillary grooves includes a heat exchange tank and a base plate in which a base plate interior 3 is provided for receiving a working medium. Within the heat exchanger tank are coolant channels 10 and phase change channels 6 alternately arranged, with cooling fins I 11 in the coolant channels 10 are provided. The heat exchange tank is mounted on the base plate such that the phase change channels 6 with the base plate interior 3 are connected and together form a tightly closed phase change heat exchange chamber. The phase change heat exchange chamber is evacuated in use to become a vacuum chamber and the base plate interior 3 is filled with working fluid. grooves 5 are on the inner wall of the phase change channels 6 arranged and within the phase change channels 6 are cooling fins II 7 or metal fiber felts provided, wherein the metal fiber felt is fixed in the phase change channel on the inner wall of the phase change channel. Capillary channels are on the inside wall of the baseplate interior 3 arranged.

The capillary channels in this embodiment are metal fiber felts and are regular or irregular pores with an equivalent diameter of 0.001-2 mm. The porosity of the capillary channels is 60% ~ 90%. The base plate includes an upper cover base plate 2 and a lower cover base plate 1, which are firmly welded together. Between the top Cover base 2 and the lower cover base plate 1 is a support structure 12 provided, which is a support column or a support rib. Both the top cover base plate 2 as well as the lower cover base plate 1 are provided on the inner walls with metal fiber felts. An upper fiber felt 15 is on the inner wall of the upper cover base plate 2 arranged. A lower fiber felt 16 is on the inner wall of the lower cover base plate 1 arranged, and an auxiliary fiber felt 13 is on the outer wall of the support structure 12 arranged. The upper fiber felt 15, the lower fiber felt 16 and the auxiliary fiber felt 13 may be either the same metal fiber felt or different metal fiber felts and their pores are all interconnected. The metal fiber felt is sintered to the inner wall of the base plate or to the outer wall of the support column. In the upper cover base plate 2 are strip-shaped through holes 14 arranged to connect the base plate interior with the phase change channels. The support structure 12 may have various shapes, such as a cylindrical, prismatic, oval or flattened or rod-shaped rib, and can be arbitrarily set as needed.

The phase change channel 6 consists of two parallel partitions surrounding it 18 and lateral sealing tapes 17 at both ends of the partitions 18 , A phase change channel 6 with a rectangular cross-section is formed by the partitions 18 and the side sealing bands 17 are fixed by soldering. The phase change channel 6 is at its top with an upper sealing tape 8th sealed and with its underside on the strip-shaped through hole of the upper cover base plate 2 attached. On the phase change channel facing side of both the partition 18 as well as from the lateral sealing tape 17 are grooves 5 arranged. In this embodiment, the grooves 5 Longitudinal grooves. The cross section of the groove 5 may have various shapes, such as a rectangular shape, a trapezoidal shape, a semicircular shape or a sine wave shape, and the width and depth of the groove 5 Both are 0.15 to 1.5 mm. The groove 5 is connected to the pores of the capillary channel. By the arrangement of the groove 5 the heat exchange surface can be increased, so that the working medium on the inner wall of the phase change channel 6 condenses rapidly and under the dual action of gravity and capillary ability, a rapid reflux in the groove 5 is reached. The combined air cooling part attaches a water tank while achieving the effects of heat exchange and storage, thereby improving the heat removal efficiency of the system.

The cooling fins I 11 are between the partitions 18 on both sides of the coolant channel 10 trapped. In this embodiment, the coolant channel 10 an air duct, ie air is used as a coolant. The wave crests of the cooling fins I 11 are on the partitions 18 soldered on both sides. At the top and bottom of the coolant channel are airtight bands 9 provided and on both sides of the heat exchanger tanks are side fenders 19 intended.

With reference to 2a . 2 B and 2c are the cooling fins II 7 Rectangular staggered-toothed ribs or flat sine wave-shaped staggered-toothed ribs or triangular corrugated ribs. The cooling fins I 11 are rectangular staggered-toothed ribs or flat sine wave-shaped staggered-toothed ribs or triangular corrugated ribs. The shallow sine waveform is a sine waveform with a flattened tip.

The cooling fins I 11 are rectangular staggered-toothed ribs with a thickness of 0.05 ~ 0.5 mm and a wave height of 2 ~ 30 mm. The wavelength of the rectangular staggered-toothed waves of cooling fins I 11 is 3 ~ 15 mm, and the wave height is 2 - 30 mm. The opening width of the rectangular staggered tooth gaps is between 0 mm and one quarter of the wave pitch.

The base material for the phase change radiator is aluminum, aluminum alloy, copper or copper alloy. The individual components can either consist of the same material or of different materials.

In this embodiment, the structure of the plate fin radiator is used, wherein the heat absorption in the evaporation and the heat radiation in the liquefaction of the phase change working medium realize the efficient heat transfer, and the liquefaction at the heat discharge end and the increased heat removal by air cooling enable the base heat to be quickly removed. In addition, the heat exchange surface area can be greatly increased using rectangular stepped-toothed fins such that the working medium is rapidly condensed at the heat removal end for heat exchange and, under the dual action of gravity and capillary action, rapid reflux in the rectangular staggered fin surface and in the capillary groove is reached. Combined air cooling saves the installation of a water tank, while at the same time achieving the effects of heat exchange and storage, which improves the heat dissipation efficiency of the system. The sintered metal fiber felt in the interior can help the working fluid at reflux and prevents the working fluid from evaporating to dryness. In addition, the fibrous layer allows the liquid working medium to be distributed evenly over the entire interior surface, thereby achieving the uniform temperature on the base plate.

The above embodiments describe only the preferred embodiments of this invention and are not to be construed as limiting the invention. Without departing from the spirit of the present invention, any equivalent variation or modification that those skilled in the art will make in accordance with the technical solutions of the present invention shall fall within the scope of the claims set forth by the present invention.

Claims (9)

An air-cooled plate rib phase change radiator with composite capillary grooves, characterized in that the air cooled plate rib phase change radiator comprises a heat exchange tank and a base plate, wherein a base plate interior for receiving the working fluid is provided in the base plate and alternating within the heat exchange tank coolant channels and phase change channels are arranged, wherein cooling fins I are provided in the coolant channels, and wherein the heat exchanger tank of the type is mounted on the base plate, that the phase change channels are connected to the base plate interior and together form a tightly closed phase change heat exchange chamber, and wherein grooves on the inner wall are disposed of phase change channels and cooling fins II or metal fiber felts are provided within the phase change channels, and wherein capillary channels on the inner wall of the base plate interior on are ordered. Air cooled plate rib phase change radiator with composite capillary grooves behind Claim 1 , characterized in that the cooling fins II are rectangular staggered-toothed ribs or flat sine wave-shaped staggered-toothed ribs or triangular corrugated ribs, wherein the cooling ribs I are rectangular staggered-toothed ribs or flat sine-wave-shaped staggered-toothed ribs or triangular corrugated ribs, wherein the Capillary channels are metal fiber felts and are regular or irregular pores with an equivalent diameter of 0.001 ~ 2 mm, with the porosity of the capillary channels being 60% ~ 90%. Air cooled plate rib phase change radiator with composite capillary grooves behind Claim 2 characterized in that the base plate comprises an upper cover base plate and a lower cover base plate, wherein both the upper cover base plate and the lower cover base plate are provided with metal fiber felts on the inner walls thereof, and in the upper cover base plate, strip-shaped through holes are arranged around the base plate interior to connect with the phase change channels. Air cooled plate rib phase change radiator with composite capillary grooves behind Claim 3 characterized in that between the upper cover base plate and the lower cover base plate is provided a support structure which is a support pillar or a support rib, wherein metal fiber felt is attached to the outer wall of the support structure. Air cooled plate rib phase change radiator with composite capillary grooves behind Claim 3 Characterized in that the cooling fins ~ 0.5 mm I rectangular staggered-toothed ribs with a thickness of 0.05, wherein the wave pitch of the rectangular staggered-toothed waves of cooling fins I3 ~ is 15 mm, and the wave height of 2 ~ 30 mm, and wherein the opening width of the rectangular staggered tooth gaps is between 0.5 mm and one quarter of the wave pitch. Air cooled plate rib phase change radiator with composite capillary grooves behind Claim 1 , characterized in that the grooves having a width and a depth of 0.1 to 1.5 mm are connected to the pores of the capillary channels. Air cooled plate rib phase change radiator with composite capillary grooves behind Claim 6 , characterized in that the phase change channel consists of two parallel partitions and lateral sealing bands at both ends of the surrounding, the phase change channel is sealed at its upper side with an upper sealing band and wherein on the phase change channel side facing both the partition and the sealing strip Grooves are arranged. Air cooled plate rib phase change radiator with composite capillary grooves behind Claim 7 characterized in that the cooling fins I are clamped between the partitions on both sides of the coolant channel, wherein air sealing bands are provided at the upper and lower ends of the coolant channel and side fenders are provided on both sides of the heat exchanger tank. Air-cooled plate rib phase change radiator with composite capillary grooves according to one of the preceding Claims 1 to 8th . characterized in that the base material for the phase change radiator is aluminum, aluminum alloy, copper or copper alloy.

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