CN218469639U

CN218469639U - End connecting structure of pulsating heat pipe

Info

Publication number: CN218469639U
Application number: CN202222491771.8U
Authority: CN
Inventors: 童保健
Original assignee: Huajing Micro Nano Technology Suzhou Co ltd
Current assignee: Huajing Micro Nano Technology Suzhou Co ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2023-02-10
Anticipated expiration: 2032-09-20

Abstract

The utility model discloses a pulsation heat pipe end connection structure, this connection structure include a microchannel parallel pipe, connect and many connecting pipes are constituteed. The connecting structure is characterized in that connecting pipes are placed in the parallel pipes of the micro-channels in advance, the parallel pipes of the micro-channels are connected end to form a flow channel connected in series inside the parallel pipes of the micro-channels in a staggered manner, two pipe orifices on the edge part of the parallel pipes of the micro-channels, which are not connected in a crossed manner inside the parallel pipes of the micro-channels, are connected with the connectors through the connecting pipes, the parallel pipes of the micro-channels and the connecting pipes and the connectors are sealed in a welding or gluing manner, a fabrication hole is reserved in each connector and used for vacuumizing and filling working media by the heat pipe, and after filling is completed, the fabrication hole needs to be sealed. The design has low processing cost, and is convenient for realizing large-scale production and industrialization of the pulsating heat pipe.

Description

End connecting structure of pulsating heat pipe

Technical Field

The invention relates to the field of radiators, in particular to a pulsating heat pipe end connecting structure.

Background

The pulsating heat pipe is a kind of a relatively common pipeline, and patent CN203148276U describes a parallel flow pulsating heat pipe, which adopts a serpentine arrangement, but in the patent, no detailed description is given to the interface of the pulsating heat pipe, which causes difficulty in actual production and is inconvenient for mass production of the pulsating heat pipe.

Disclosure of Invention

In order to solve the problems, the invention provides a connection structure for the end part of a pulsating heat pipe.

According to the utility model discloses an aspect provides a pulsation heat pipe end connection structure, its characterized in that: the connecting structure comprises a micro-channel parallel pipe, a joint and a plurality of connecting pipes. The micro-channel parallel pipes are opposite end to end through bending, the connecting structure is characterized in that connecting pipes are preset in the micro-channel parallel pipes, the micro-channel parallel pipes are connected end to end through staggered connection to form a flow channel connected in series inside, two pipe openings at the edge part of the micro-channel parallel pipes which are not connected in a crossed manner inside are connected with a connector through two connecting pipes, the micro-channel parallel pipes and the connecting pipes are sealed in a welding or cementing mode, a process hole is reserved in the connector and used for vacuumizing and filling working media by a heat pipe, and the process hole needs to be sealed after filling is completed;

preferably, the microchannel parallel tubes are bent into a snake shape, the ends of the microchannel parallel tubes are opposite to each other by bending, the gap between the end faces is 0.1-5 mm, and the gap is connected and sealed by using solder or glue when the connecting tube is in sealed connection with the microchannel parallel tubes;

preferably, the number of the connecting pipes is at least 5, and the length of the connecting pipes needs to be larger than the gap between the end faces of the micro-channel; when the connecting pipe is placed, both ends of the connecting pipe exceed the gap of the end surface of the micro-channel, and the exceeding length is more than 1mm; the longer length is adopted, which is beneficial to avoiding the blockage formed by the solder or colloid flowing into the connecting pipe orifice in the welding or gluing sealing process.

Preferably, the material of the connecting pipe is different from that of the parallel pipe of the micro-channel, the parallel pipe of the micro-channel is made of aluminum alloy, and the connecting pipe is made of stainless steel or red copper; the material of the connecting pipe needs to be selected by considering that the melting point of the connecting pipe is higher than the solidification temperature of the solder or the thermal solidification glue, and the material of the connecting pipe can be selected to be non-wetting to the solder or the glue so as to reduce the probability of blockage caused by a sealing process.

Furthermore, the pulsating heat pipe with the end connecting structure of the pulsating heat pipe is applied, fins are arranged between the wall surfaces of the parallel pipes of the micro-channel to form a pulsating heat pipe heat exchanger, wherein one part of the pulsating heat pipe heat exchanger is used for absorbing heat to form an evaporation section of the pulsating heat pipe, and one part of the pulsating heat pipe heat exchanger is used for releasing heat to form a condensation section of the pulsating heat pipe. The product can be used for energy heat recovery application and can also be used for heat dissipation in an environment with air as a heat source.

Furthermore, the pulsating heat pipe with the structure for connecting the end parts of the pulsating heat pipe is applied, a heat collecting plate is arranged between the wall surfaces of the parallel pipes of the micro-channel at one end, and a fin is arranged between the wall surfaces of the parallel pipes of the micro-channel at the other end to form a pulsating heat pipe radiator, wherein one end of the heat collecting plate is arranged to be an evaporation section of the pulsating heat pipe, and the other end of the fin is arranged to be a condensation section of the pulsating heat pipe.

The invention has the beneficial effects that:

1. the connecting pipe is arranged in the micro-channel parallel pipe in advance, so that the butt joint difficulty of the micro-channel parallel pipe is greatly reduced;

2. a sealing structure is formed between the connecting pipe and the parallel pipe of the micro-channel in a welding or cementing mode, so that the sealing strength is increased;

3. the processing cost is low, and large-scale production and pulse heat pipe industrialization are conveniently realized.

Drawings

FIG. 1 is a front view of a pulsating heat pipe end connection in accordance with the present invention;

FIG. 2 is a partial front view of a pulsating heat pipe end connection of the type shown in FIG. 1;

FIG. 3 is a partial end detail cross-sectional view of one pulsating heat pipe end connection of FIG. 2;

FIG. 4 is a front view of a heat sink comprising a pulsating heat pipe end connection of FIG. 1;

FIG. 5 is a front view of a heat exchanger constructed with a pulsating heat pipe end connection of FIG. 1.

In the figure: the device comprises a joint 1, a plurality of pipelines 2, a micro-channel parallel pipe 3, fins 4, a metal block 5 and a sealing material 7.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, the connecting structure comprises a micro-channel parallel pipe 3 having a plurality of parallel channels (16 in the present embodiment), a joint 1, and a plurality of (17 in the present embodiment) connecting pipes 2. The micro-channel parallel pipe 3 is bent into a serpentine shape having a straight middle and a curved end by a sheet metal bending technique, and the end faces of the micro-channel parallel pipe 3 are placed opposite to each other by bending, the distance between the end faces is 0.1mm to 5mm, preferably 1mm, the length of the connecting pipe 2 is greater than the gap between the end faces of the micro-channel parallel pipe 3

The connection structure is formed by placing each connection pipe 2 in advance through a part thereof (15 in this embodiment) into the interior of the parallel microchannel tubes 3, inserting both sides thereof into the parallel microchannel tubes 20mm and 30mm, respectively, by cross-connecting, and connecting the parallel microchannel tubes 3 end to form flow channels connected in series inside.

Two pipe orifices of the edge part which are not connected with each other in a crossing way in the micro-channel parallel pipe 3 are also connected with the joint 1 through another 2 connecting pipes 2, and the two connecting pipes 2 are inserted into the micro-channel parallel pipe 3 by 30mm.

The connecting pipe and the micro-channel parallel pipe 3, the connecting pipe 2 and the connector 1 are sealed in a cementing mode, a fabrication hole is reserved in the connector, and the outer diameter of the fabrication hole connecting pipe is preferably 3-8 mm.

The design adopts a 6mm aluminum pipe for vacuumizing and filling working media of the heat pipe, the working media can adopt materials such as ethanol, acetone, ammonia, fluoride liquid, freon and the like, R134a is adopted in the embodiment, after filling is completed, the process hole is sealed in a cementing mode, and in order to guarantee cementing strength and service life, the sealing material 7 completely covers all the connecting pipes 2.

The connecting pipe 2 is made of stainless steel or red copper.

Fig. 4 shows a schematic diagram of a heat sink composed of the pulsating heat pipe connection structure of the present invention. The heat sink comprises a connecting structure, a plurality of fins 4 and a metal block 5. And a heat collecting plate 5 is arranged between the wall surfaces of one end of the micro-channel parallel pipe 3, and a fin 4 is arranged between the wall surfaces of the other end of the micro-channel parallel pipe 3, so that the pulsating heat pipe radiator is formed.

The surface of the metal block 5 is grooved, one end of the micro-channel parallel tube 3 is placed in the metal block groove, and in order to reduce the contact thermal resistance, the contact area between the inner surface of the groove and the outer surface of the micro-channel parallel tube is reduced by adopting heat-conducting glue. And the fins 4 are used to increase the heat dissipation area.

The pulsating heat pipe is divided into an evaporation section for absorbing heat and a condensation section for releasing heat, the end where the heat collecting plate 5 is located is the evaporation section, and the end where the fin 4 is located is the condensation section.

Fig. 5 shows a schematic diagram of a heat exchanger consisting of the pulsating heat pipe connection structure of the present invention, which comprises a connection structure and a plurality of fins 4. Each fin 4 is installed between the wall surfaces of the microchannel parallel tubes 3 for increasing the heat dissipation area.

Wherein, a part of the heat exchanger passes through high-temperature air, the part is called as an evaporation section of the pulsating heat pipe, and the other part of the heat exchanger passes through low-temperature air, the part is called as a condensation section of the pulsating heat pipe, so that heat exchange is realized, and the heat exchanger can be applied to a heat recovery system.

What has been described is just one pulsating heat pipe end connection configuration of the present invention and its application. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which all fall within the scope of the invention.

Claims

1. A pulsation heat pipe end connection structure is characterized in that: including a microchannel parallel tubes (3), connect (1) and many connecting pipes (2), microchannel parallel tubes (3) are relative through bending head and tail, wherein inside of putting into microchannel parallel tubes (3) is preset in some connecting pipe (2), and with microchannel parallel tubes (3) head and tail homogeneous phase connect and form the inside runner of establishing ties, two mouths of pipe of the not inside cross connection's of microchannel parallel tubes (3) limit portion still link to each other with connecting pipe (2) through other two connecting pipes (1), connecting pipe (2) and microchannel parallel tubes (3) and connecting pipe (2) and joint (1) are all sealed through welding or cementated mode, the joint leaves a fabrication hole.

2. A pulsating heat pipe end connection structure as defined in claim 1, wherein: the parallel pipes (3) of the micro-channel are bent into a snake shape and are opposite end to end through bending.

3. A pulsating heat pipe end connection structure as defined in claim 2, wherein: the clearance between the end surfaces of the parallel pipes (3) of the micro-channel is 0.1mm-5mm.

4. A pulsating heat pipe end connection structure as defined in claim 1, wherein: the number of the connecting pipes (2) is at least 5, and the length of the connecting pipes (2) is larger than the clearance between the end surfaces of the parallel pipes (3) of the micro-channel.

5. A pulsating heat pipe end connection structure as defined in claim 1, wherein: the microchannel parallel tubes (3) are made of aluminum alloy.

6. A pulsating heat pipe end connection structure as defined in claim 1, wherein: the connecting pipe (2) is made of stainless steel or red copper.

7. A pulsating heat pipe end connection structure as defined in any of claims 1 to 6, wherein: a heat collecting plate (5) is arranged between the wall surfaces of one end of the micro-channel parallel pipe (3), a fin (4) is arranged between the wall surfaces of the other end of the micro-channel parallel pipe (3), and a pulsating heat pipe radiator is formed, wherein the heat collecting plate (5) is located at an evaporation section of the pulsating heat pipe, and the fin (4) is located at a condensation section of the pulsating heat pipe.

8. A pulsating heat pipe end connection structure as defined in any of claims 1 to 6, wherein: a fin (4) is arranged between the wall surfaces of the micro-channel parallel tubes (3) to form a pulsating heat pipe heat exchanger, one part of the micro-channel parallel tubes (3) is positioned at an evaporation section of the pulsating heat pipe, and the other part of the micro-channel parallel tubes is positioned at a condensation section of the pulsating heat pipe.