CN115435628A

CN115435628A - Cold plate heat exchanger with inlet and outlet centralizing device

Info

Publication number: CN115435628A
Application number: CN202210990744.7A
Authority: CN
Inventors: 徐鹏华; 夏文庆; 钟宇
Original assignee: Hangzhou Le Maiji New Energy Technology Co ltd
Current assignee: Hangzhou Le Maiji New Energy Technology Co ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2022-12-06

Abstract

The invention discloses a cold plate heat exchanger with an inlet and outlet centralizing device, aiming at providing a cold plate heat exchanger with an inlet and outlet centralizing device with compact structure, which comprises a heat-conducting substrate, a heat-radiating heat source, an inlet centralizing box, an outlet centralizing box and a plurality of heat-conducting pipes, wherein the heat-conducting substrate is contacted with the heat-radiating heat source, a plurality of channels matched with the plurality of heat-conducting pipes one by one are arranged on the heat-conducting substrate, the heat-conducting pipes are attached to the side walls of the channels, heat-conducting working media flow in the heat-conducting pipes, one ends of the heat-conducting pipes are communicated with the inlet centralizing box, the other ends of the heat-conducting pipes are communicated with the outlet centralizing box, and the heat-conducting substrate is positioned between the inlet centralizing box and the outlet centralizing box. The invention has the beneficial effects that: the structure is compact, and the pipeline connection is simpler and more convenient; the device is suitable for different use scenes, and the practicability is improved; the installation and the maintenance are convenient; the heat exchange efficiency is high, and the energy is saved.

Description

Cold plate heat exchanger with inlet and outlet centralizing device

Technical Field

The invention relates to the technical field of heat exchangers, in particular to a cold plate heat exchanger with an inlet and outlet concentration device.

Background

At present, the application of heat exchangers is more and more extensive, but the requirement on the uniformity of the surface temperature of the heat exchanger is high in many occasions.

The large difference of the internal temperature of the high-power electronic and electric element is caused by the non-uniformity of the heat consumption and the heat transfer process, additional temperature drift and temperature stress are formed, and the performance and the service life of the high-power electronic and electric element are seriously influenced.

The existing heat pipe heat exchanger can effectively reduce the unevenness of a temperature field, but the heat pipe needs to be filled with working media, the heat transfer effect of the heat pipe is limited by the fact that the thermophysical properties of the working media are more, although the temperature is leveled, two heat transfer links of an evaporation end and a condensation end are added, and the arrangement of a small micro space is very unfavorable.

In order to solve the technical problems, the chinese patent of invention with application number CN201710966028.4 "a cold plate heat exchanger and heat exchange method based on temperature difference hedging" discloses a cold plate heat exchanger and heat exchange method based on temperature difference hedging, which comprises a heat conduction substrate, a heat transfer pipe, a double-inlet header pipe and a double-outlet header pipe, wherein the heat conduction substrate is provided with a heat dissipation heat source and is provided with an open channel or a closed channel, the heat transfer pipe is embedded in the channel, and the heat transfer pipe and the channel form interference fit; the heat transfer working medium in the tube of the cold plate symmetrically enters the double-inlet collecting tube in two ways, flows into the heat transfer tube, passes through the heat transfer tube, then flows out of the cold plate through the double-outlet collecting tube.

The cold plate heat transfer process is in the temperature equalizing process through a heat transfer temperature difference hedging mechanism of the heat transfer infinitesimal, the uniformity of high-density heat transfer temperature and temperature difference of a narrow space is greatly improved, and thermal stress, temperature characteristic drift and the like caused by non-uniformity of temperature difference in the heat transfer process can be effectively eliminated. However, the heat exchanger still has some disadvantages and shortcomings in practical processing and application, which are embodied as follows: (1) The configuration mode of limiting the double inlets and the double outlet headers is not enough to meet all practical application requirements, and the number of inlets and outlets cannot be flexibly configured; (2) the pipeline is complicated and is inconvenient to connect; (3) Because the two paths of the heat transfer working medium in the tube of the cold plate symmetrically enter the double-inlet collecting tube and then flow into the heat transfer tube, the cold plate occupies larger space and has a not compact structure.

Therefore, there is a need for an improved cold plate heat exchanger configuration that addresses both of the above-mentioned problems.

Disclosure of Invention

The invention provides a cold plate heat exchanger with a centralized inlet and outlet device, which has a compact structure and aims to overcome the defect that the cold plate heat exchanger in the prior art is not compact enough.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a centralized arrangement's cold plate heat exchanger is imported and exported in area, it includes heat conduction base plate, heat dissipation heat source, import centralized box, export centralized box and a plurality of heat-transfer pipes, the heat conduction base plate contacts with the heat dissipation heat source, be equipped with a plurality of and a plurality of heat-transfer pipe one-to-one assorted passageway on the heat conduction base plate, the heat-transfer pipe laminates with the lateral wall of passageway mutually, it has heat transfer working medium to flow in the heat-transfer pipe, the one end and the import centralized box of heat-transfer pipe communicate mutually, the other end and the export centralized box of heat-transfer pipe communicate mutually, the heat conduction base plate is located between import centralized box and the export centralized box.

The heat conduction substrate is in contact with a heat dissipation heat source, a plurality of channels matched with the heat transfer pipes one by one are arranged on the heat conduction substrate, the heat transfer pipes are attached to the side walls of the channels, heat transfer working media flow in the heat transfer pipes, one ends of the heat transfer pipes are communicated with the inlet concentration box, the other ends of the heat transfer pipes are communicated with the outlet concentration box, and the heat conduction substrate is located between the inlet concentration box and the outlet concentration box. The inlet concentration box and the outlet concentration box are all objects with any shapes and certain volumes, and the shapes of the inlet concentration box and the outlet concentration box are determined according to practical requirements. The heat dissipation heat source flows through the surface of the heat conduction substrate or flows through the inside of the heat conduction substrate or is placed on the heat conduction substrate or is placed inside the heat conduction substrate or is not in direct contact with the heat conduction substrate. The arrangement, number, channel size and length of the heat transfer pipes are determined according to the space size and size of the heat dissipation heat source. The heat transfer working medium enters the inlet concentration box firstly, then is distributed into the plurality of heat transfer pipes in a concentrated manner through the inlet concentration box, exchanges heat with an external heat source through the heat conduction substrate, flows into the outlet concentration box for converging after heat exchange in the plurality of heat transfer pipes, and finally flows out from the outlet concentration box in a concentrated manner.

Preferably, the number of the inlet header tanks is one or more. So as to adapt to different use scenes and improve the practicability.

Preferably, the number of the outlet concentration boxes is one or more. So as to adapt to different use scenes and improve the practicability.

Preferably, the inlet and outlet concentration tanks are separated from each other for easy installation and maintenance.

As another preferred, the inlet collection box and the outlet collection box are connected into a whole, so that the structure is compact, and the space is saved.

Preferably, the cross-sectional shape of the channel on the heat-conducting substrate is a large semicircle or an ellipse, and the central angle is not less than 180 °.

Preferably, the channels on the heat-conducting substrate are made by extrusion or cutting or die casting or fusion casting or corrosion.

Preferably, the heat transfer working medium is gas or liquid of single-phase temperature difference heat exchange.

As another preference, the heat transfer working medium is a phase-change heat exchange liquid.

Preferably, the interior of the heat-conducting substrate is a solid compact structure.

As another preferable mode, the interior of the heat conducting substrate has a spatial structure.

Preferably, the heat exchanger further comprises an external cold source, and the outlet header is communicated with the inlet header through the external cold source. The quantity of outside cold source is one or more, concentrates the heat transfer working medium that flows out in the concentrated case of follow export, gets back to the concentrated incasement of import once more after getting the cooling with outside cold source contact, circulates in proper order, and heat exchange efficiency is high, and does benefit to the energy saving.

The invention has the beneficial effects that: the structure is compact, and the pipeline connection is simpler and more convenient; the device is suitable for different use scenes, and the practicability is improved; the installation and the maintenance are convenient; high heat exchange efficiency and is beneficial to energy conservation.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is a schematic cross-sectional view of a thermally conductive substrate.

In the figure: 1. the heat transfer tube, 2, heat conduction base plate, 3, import collection box, 4, export collection box, 5, heat dissipation heat source, 6, heat transfer working medium.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

In the embodiment shown in fig. 1 and 2, a cold plate heat exchanger with an inlet and outlet concentrator includes a heat conducting substrate 2, a heat dissipating source 5, an inlet concentrator box 3, an outlet concentrator box 4, and a plurality of heat transfer tubes 1, the heat conducting substrate 2 contacts with the heat dissipating source 5, the heat conducting substrate 2 is provided with a plurality of channels matching with the plurality of heat transfer tubes 1 one by one, the heat transfer tubes 1 are attached to the side walls of the channels, a heat transfer medium 6 flows in the heat transfer tubes 1, one end of the heat transfer tubes 1 is communicated with the inlet concentrator box 3, the other end of the heat transfer tubes 1 is communicated with the outlet concentrator box 4, and the heat conducting substrate 2 is located between the inlet concentrator box 3 and the outlet concentrator box 4.

The number of inlet header tanks 3 and outlet header tanks 4 may be one or more.

The inlet header tank 3 and the outlet header tank 4 are separated from each other. The inlet header 3 and the outlet header 4 may be integrated.

As shown in fig. 3, the cross-sectional shape of the channel of the heat conductive substrate 2 is a large semicircle or an ellipse having a central angle of not less than 180 °.

The channels on the heat-conducting substrate 2 are made by extrusion or cutting or die-casting or fusion-casting or corrosion.

The heat transfer working medium 6 is gas or liquid of single-phase temperature difference heat exchange. The heat transfer medium 6 may also be a phase change heat exchange liquid.

As shown in fig. 3, the heat conductive substrate 2 has a solid and dense structure inside. The interior of the heat conductive substrate 2 may also be a spatial structure.

Still include external cold source, export case 4 is concentrated and is linked together through external cold source and import case 3.

The heat transfer pipe 1 may be a multi-pass, and the heat transfer pipe 1 and the heat conductive substrate 2 are made of metal or nonmetal.

The heat exchange process inside the cold plate heat exchanger with the inlet and outlet centralizing device is as follows: the heat transfer working medium 6 enters the inlet concentration box 3 firstly, then is distributed to a plurality of heat transfer pipes 1 in a centralized way through the inlet concentration box 3, through the heat convection in the pipes, the heat conduction of the heat transfer pipes 1 and the heat conduction substrate 2, the heat conduction or convection or radiation of the heat conduction substrate 2 and the heat dissipation heat source 5 completes the heat transfer process, the heat transfer working medium 6 in the heat transfer pipes 1 all flows into the outlet concentration box 4 to be converged, finally flows out from the outlet concentration box 4 in a centralized way, the heat transfer function is completed, the heat transfer working medium 6 flowing out from the outlet concentration box 4 in a centralized way returns to the inlet concentration box 3 again after being cooled down by being in contact with an external cold source, and the circulation is carried out in sequence. The temperature field of the heat conducting substrate 2 and the heat exchange surface of the external heat source of the heat exchanger can be controlled by controlling the flow direction and flow velocity of the heat transfer working medium 6 in each heat transfer pipe 1. Specially, (1) heat transfer pipes 1 are arranged at equal intervals; (2) the heat transfer working media 6 in the two adjacent heat transfer pipes 1 have opposite flow directions and equal flow; (3) the heat-conducting substrate 2 has a sufficient thickness; (4) when the external heat source dissipates heat evenly, the temperature fields of the heat-conducting substrate 2 and the heat-exchanging surface of the external heat source of the heat exchanger are considered to be even due to the symmetry of the internal heat conduction.

In a word, the cold plate heat exchanger with the inlet and outlet centralizing device provided by the invention can effectively make up for the defects in the prior art, so that the heat transfer process of the heat exchanger is in a temperature field controllable state, a temperature field with average temperature can be formed, a temperature field with specified temperature distribution can also be formed, the heat exchange density is high, and the occupied space is small.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can understand that the modifications or substitutions should be included in the scope of the present invention, and therefore, the scope of the present invention should be subject to the protection scope of the claims.

Claims

1. The utility model provides a cold plate heat exchanger of centralized arrangement is imported and exported in area, its characterized in that, includes heat conduction base plate (2), heat dissipation heat source (5), import centralized box (3), export centralized box (4) and a plurality of heat-transfer pipe (1), heat conduction base plate (2) contacts with heat dissipation heat source (5), be equipped with a plurality of and a plurality of heat-transfer pipe (1) one-to-one assorted passageway on heat conduction base plate (2), heat-transfer pipe (1) laminates with the lateral wall of passageway mutually, it has heat transfer working medium (6) to flow in heat-transfer pipe (1), the one end and the import centralized box (3) of heat-transfer pipe (1) are linked together, the other end and the export centralized box (4) of heat-transfer pipe (1) are linked together, heat conduction base plate (2) are located between import centralized box (3) and the export centralized box (4).

2. Cold plate heat exchanger with inlet and outlet centralizers according to claim 1, characterised in that the number of inlet centralizers (3) is one or more.

3. Cold plate heat exchanger with inlet and outlet centralizers according to claim 1, characterised in that the number of outlet centralizers (4) is one or more.

4. Cold plate heat exchanger with inlet and outlet concentration device according to claim 1, characterized in that the inlet (3) and outlet (4) concentration tanks are separate from each other.

5. The cold plate heat exchanger with inlet and outlet centralizers as claimed in claim 1, characterized in that the inlet centralizers (3) and the outlet centralizers (4) are connected into a whole.

6. The cold plate heat exchanger with inlet and outlet centralizers as claimed in claim 1, characterized in that the cross-sectional shape of the channel on the heat conducting base plate (2) is a large semicircle or an ellipse, and the central angle is not less than 180 °.

7. Cold plate heat exchanger with inlet and outlet centralizers according to claim 1, characterised in that the channels on the heat conducting base plate (2) are made by extrusion or cutting or die casting or fusion casting or corrosion.

8. Cold plate heat exchanger with inlet and outlet centralizers according to claim 1, characterised in that the heat transfer medium (6) is a gas or a liquid with single phase temperature difference heat exchange.

9. Cold plate heat exchanger with inlet and outlet centralizers according to claim 1, characterised in that the heat transfer medium (6) is a phase change heat exchange liquid.

10. The cold plate heat exchanger with inlet and outlet centralizers as claimed in claim 1, characterized in that the interior of the heat conducting base plate (2) is of solid dense structure.

11. The cold plate heat exchanger with inlet and outlet centralizers as claimed in claim 1, characterized in that the interior of the heat conducting base plate (2) is a spatial structure.

12. A cold plate heat exchanger with inlet and outlet concentration means according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11, characterized in that it further comprises an external heat source, and the outlet concentration tank (4) is connected with the inlet concentration tank (3) through the external heat source.