CN201093903Y - Flat plate type multichannel combined type heat tube - Google Patents

Abstract

The utility model relates to a flatbed multi-channel combined heat pipe, wherein, the flatbed heat pipe functions as evaporation chamber. The flatbed heat pipe is connected with a single or a plurality of tubular heat pipes so that the inner cavity of the tubular heat pipe is communicated with the inner cavity of the flatbed heat pipe, thus forming a closed space. The tubular heat pipe and the flatbed heat pipe are connected on the single side, two sides or plurality sides of the flatbed heat pipe; the tubular heat pipe connected on two sides or plurality sides of the flatbed heat pipe can be independent or cross linked into a closed circuit. In using, the flatbed heat pipe and the plate radiating surface of the parts to be cooled are tightly contacted with low thermal resistance, big evaporation area and strong heat transmission; the radiating surface has more even temperature; the tubular heat pipe can transfer the heat in long-distance; and the multi-channel helps the working medium in the evaporation chamber of the flatbed heat pipes to flow more smoothly, which increases the flowing cross section of the channel, reduces the flowing resistance, reduces the heat transmission temperature difference, and increase the heat-transfer capability.

Description

A flat multi-channel combined heat pipe

technical field

The utility model belongs to the technical field of heat transfer, in particular to heat transfer by using a heat pipe.

Background technique

A heat pipe is a device that relies on the phase change of its internal working medium to achieve heat transfer. The working medium in the tube is heated and evaporated at the evaporating end, and the generated steam flows to the condensing end under a certain pressure difference, and releases heat at the condensing end. Re-condensed into liquid and returned to the evaporation end, thus forming the circulation of the working medium.

Traditional heat pipes are mostly tubular, which can easily realize long-distance heat transmission under small temperature differences, but in many cases, the heat dissipation surface of the cooled components is flat, such as most electronic components, computer CPUs, LED light-emitting components, etc. , in order to transfer the heat of the cooled part to the condensation end more effectively, it is often necessary to add a saddle-shaped or other shaped heat conductor between the heat pipe and the cooled part, which not only increases the distance between the heat pipe and the cooled part Thermal resistance, but also increase the volume and weight of the system, leading to an increase in cost. For heating components with a flat heat dissipation surface, the use of a flat heat pipe is a good solution to heat dissipation. Since the heat dissipation surface of the flat heat pipe and the cooled component can be in close contact, it is no longer necessary such as a saddle-shaped heat conduction An intermediate heat conductor such as a block reduces the thermal resistance and overcomes the problems of the tube heat pipe; but for the flat heat pipe, due to its structural characteristics, the heat transmission distance is greatly limited. When it is necessary to transfer the heat generated by the cooled components to a distant place, the flat heat pipe is often incompetent.

Contents of the invention

The utility model combines the advantages of the tubular heat pipe and the flat heat pipe, not only utilizes the advantages of the flat heat pipe being in close contact with the flat heat dissipation surface, small thermal resistance, and large evaporation area, but also utilizes the advantages that the tubular heat pipe can realize heat dissipation. The advantages of long-distance transmission and flexible arrangement of the condensation section.

The technical scheme adopted by the utility model is: connect the flat heat pipe with single or multiple pipe heat pipes, so that the inner cavity of the tubular heat pipe communicates with the inner cavity of the flat heat pipe to form a closed space

The heating surface of the flat heat pipe is one of quadrilateral, circular, oval and triangular.

The connection between the tube heat pipe and the flat heat pipe is on one side of the flat heat pipe or on both sides of the flat heat pipe or on multiple sides of the flat heat pipe.

The tubular heat pipes connected to two or more sides of the flat heat pipe are independent or connected to each other to form a closed circuit.

The inner and outer shapes of the cross section of the tubular heat pipe are oval or quadrilateral.

The inner wall of the tubular heat pipe is a smooth tube wall or engraved with grooves or attached with a mesh or porous material that increases capillary force.

The outer wall of the tubular heat pipe is smooth or finned.

In use, the flat heat pipe is used as the evaporation chamber of the heat transfer circuit, and the planar heat dissipation surface of the cooled component and the flat evaporation chamber are closely contacted by pressing, bonding, welding or other methods. A tube heat pipe is connected to one or more sides of the evaporation chamber; the tube heat pipe is used as a transmission channel for the working medium and heat; one end of the tube heat pipe is open, and the open end is connected to the flat plate by bonding, welding or other methods The lumens of the heat pipes are connected together so that the lumens of the tubular heat pipes communicate with the lumens of the flat heat pipes to form a closed space, and the working medium of the flat heat pipes can enter the tubular heat pipes, and vice versa. The heat emitted by the cooled parts is transferred to the working medium inside the evaporation chamber through the wall of the flat heat pipe evaporation chamber. The tube-type heat pipe channels connected by the cavity flow to the condensing end, and the steam releases heat at the condensing end of the heat pipe, and is condensed into a liquid again, and then the liquid working medium flows back to the evaporating end along the tube-type heat pipe channel, thereby forming a circulation of the working medium.

The flat heat pipe evaporation chamber is in good contact with the flat heat dissipation surface, the heat transfer resistance is small, the evaporation area is large, the heat transfer capacity is strong, and the temperature on the entire heat dissipation surface is more uniform; the tubular heat pipe realizes long-distance heat transmission; and the multi-channel The arrangement makes the flow of the working medium in the evaporation chamber more uniform, increases the flow cross-sectional area of the channel, reduces the flow resistance, and reduces the heat transfer temperature difference.

The heat transfer capacity is improved; at the same time, the arrangement of the condensation section in the heat transfer circuit is also more flexible, and several condensation sections can be arranged, and each condensation section can be located in a different position.

The beneficial effects of the utility model are: while reducing the heat transfer resistance between the evaporation chamber and the cooled parts, increasing the evaporation area, and improving the heat transfer capacity, it can realize long-distance transmission of heat and flexible arrangement of the condensation section of the heat pipe.

The utility model is especially suitable for the situation that the heat dissipation surface of the cooled component is a plane, such as the heat dissipation of electronic components, computer CPU, LED light emitting components and other components and equipment.

Description of drawings

Fig. 1 is a schematic diagram of a tube heat pipe connected to one side of a flat heat pipe.

Fig. 2 is a schematic diagram of the tube heat pipe connected to the upper side of the flat heat pipe.

Fig. 3 is a schematic diagram of a tube heat pipe connected to both sides of a flat heat pipe.

Fig. 4 is a schematic diagram showing that the tube heat pipes are connected to both sides of the flat plate heat pipes, and the tube heat pipes on both sides are connected to each other to form a closed circuit.

In the figure: 1. Flat heat pipe, 2. Tube heat pipe, 3. Condensing section

Detailed ways

Below in conjunction with accompanying drawing embodiment the utility model is described in further detail:

In the embodiment shown in FIG. 1 , the tube heat pipe 2 is connected to one side of the flat heat pipe 1 so that the inner cavity of the tube heat pipe communicates with the inner cavity of the flat heat pipe to form a closed space. The working medium in the flat-plate heat pipe evaporation chamber is heated and vaporized, and the generated steam enters the tube-type heat pipe channel connected to one side of the evaporation chamber and flows to the condensation end. The steam releases heat at the condensation end and is re-condensed into a liquid, and then the liquid working medium Under the action of gravity and capillary force, it flows back to the evaporation chamber along the tube heat pipe channel.

Fig. 2 shows another embodiment where the tube heat pipe 2 is connected to one side of the flat heat pipe 1, the difference is that the tube heat pipe is connected to the upper side of the flat heat pipe.

FIG. 3 shows a specific embodiment where the tubular heat pipe 2 is connected to both sides of the flat heat pipe 1 . The difference from the embodiment in FIG. 1 is that in this embodiment, the tube heat pipes are connected to both sides of the flat heat pipes.

FIG. 4 shows another specific embodiment in which the tube heat pipe 2 is connected to both sides of the flat heat pipe 1 . In this embodiment, the tube heat pipe is connected on both sides of the flat heat pipe so that the inner cavity of the tube heat pipe communicates with the inner cavity of the flat heat pipe to form a closed space; Tubular heat pipe channels are interconnected to form a closed loop. The working medium in the evaporation chamber is heated and vaporized, and the generated steam enters the tube heat pipe channel connected to both sides of the evaporation chamber and flows to the condensation end 3. The steam releases heat at the condensation end and is re-condensed into a liquid, and then the liquid working medium is released under gravity. Under the action of capillary force, it flows back to the evaporation chamber along the tube heat pipe channel.

The heating surface of the said flat heat pipe evaporation chamber of the utility model can be quadrilateral, also can be circular, oval, triangular or other regular or irregular geometric shapes. The connection between the tube heat pipe and the flat heat pipe can be arranged on one side of the flat heat pipe, as shown in Figure 1 and Figure 2, or it can be arranged on both sides of the flat heat pipe, as shown in Figure 3 and Figure 4, or arranged On many sides of the flat heat pipe.

For the case where the tube heat pipes are installed on both sides or multiple sides of the flat heat pipes, the channels of the tube heat pipes connected to each side of the flat heat pipe evaporation chamber can be independent, as shown in Figure 3, or they can be connected to each other to form a closed circuit, as shown in Figure 4. In the embodiment in which the channels of the tubular heat pipes are connected to each other to form a closed loop, the connection of the channels can be connected in a corresponding order as shown in FIG. 4 , or can be connected in cross-connection or other ways.

The shape of the tubular heat pipe shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4 is a specific embodiment of the present utility model, and the inner and outer shapes of the cross-section of the tubular heat pipe are not limited to circular, and can also be oval , quadrilateral or other geometric shapes; the inner wall of the tube heat pipe can be a smooth tube wall, it can also be engraved with grooves, or with a mesh or porous material to increase the capillary force; the outer wall of the tube heat pipe can be a smooth tube wall or Ribbed.

Claims (7)

1. a flat multi-channel assembled heat pipe is characterized in that: flat plate heat tube and single or multiple tubing hot-pipe are linked together, make the inner chamber of tubing hot-pipe and the inner chamber of flat plate heat tube communicate, form a confined space.

2. flat multi-channel assembled heat pipe according to claim 1 is characterized in that: the heating surface of described flat plate heat tube is one of quadrangle, circle, ellipse, triangle.

3. flat multi-channel assembled heat pipe according to claim 1 is characterized in that: described tubing hot-pipe and flat plate heat tube be connected the one-sided of flat plate heat tube or at the bilateral of flat plate heat tube or in many sides of flat plate heat tube.

4. flat multi-channel assembled heat pipe according to claim 1 is characterized in that: each tubing hot-pipe that is connected flat plate heat tube bilateral or many sides is independently or is interconnected to the closed-loop path.

5. flat multi-channel assembled heat pipe according to claim 1 is characterized in that: the inside and outside shape of the cross section of described tubing hot-pipe is ellipse or quadrangle.

6. flat multi-channel assembled heat pipe according to claim 1 is characterized in that:; The inwall of tubing hot-pipe is smooth tube wall or is carved with conduit or has the netted or porous material that increases capillary force.

7. flat multi-channel assembled heat pipe according to claim 1 is characterized in that: the outer wall of tubing hot-pipe is smooth tube wall or fin is housed.

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