CN111200921A

CN111200921A - Heat dissipation cold plate structure with divide water, water collection function

Info

Publication number: CN111200921A
Application number: CN202010018888.7A
Authority: CN
Inventors: 李舒; 晏腾飞; 李�荣; 陈伟
Original assignee: 724th Research Institute of CSIC
Current assignee: 724th Research Institute of CSIC
Priority date: 2020-01-08
Filing date: 2020-01-08
Publication date: 2020-05-26
Anticipated expiration: 2040-01-08
Also published as: CN111200921B

Abstract

The invention provides a heat dissipation cold plate structure with water distribution and collection functions, and belongs to the field of cooling and heat dissipation of electrical component assemblies. The inner flow passage of the heat dissipation cold plate comprises an inlet flow passage and an outlet flow passage; the inlet flow channel comprises a main inlet flow channel and n branch inlet flow channels; the outlet flow passage comprises a main outlet flow passage, an outlet flow passage heat dissipation area and n branch outlet flow passages. The outer surface of the heat dissipation cold plate is provided with a boss group, and the position of the boss group corresponds to the position of the heating element at the outer side of the upper cold plate. The heat dissipation cold plate reduces the weight of the cold plate and enables the cold plate to have the functions of water distribution and water collection through the reasonable design of the internal flow channel; and the heat dissipation efficiency of the laminated water-cooling heat dissipation structure is improved through the boss group on the outer surface of the cold plate. The heat dissipation cold plate structure provided by the invention can be widely applied to an integrated laminated water-cooling heat dissipation structure.

Description

Heat dissipation cold plate structure with divide water, water collection function

Technical Field

The invention belongs to the field of cooling and heat dissipation of electrical component assemblies.

Background

Traditional cold drawing distributes and the temperature distribution according to the heating element spare position of installing on the cold drawing, and the trend of runner in the reasonable design cold drawing takes away the heating element spare heat through the cooling heat in the runner, to the heating element spare forced cooling. In order to adapt to large-scale array of the cold plate assembly, a water distributor and a water collector are designed, and cooling liquid in a main flow passage is distributed according to a cold plate array form. In a limited space, the water-cooling heat dissipation efficiency and the water-cooling heat dissipation reliability are improved, patent CN203826531U proposes a stacked water-cooling heat dissipation structure, but the heat dissipation of the structure is mainly realized by an upper cold plate, and a lower cold plate only plays the role of a water separator and a water collector. When the heating components on the upper cold plate are distributed in a stacked manner and the number of layers is large, the heat dissipation effect of the upper cold plate is obviously reduced. How to effectively use the lower cold plate and make the lower cold plate and the upper cold plate cool the heating source device together is the point to be improved of the laminated heat dissipation structure.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a heat dissipation cold plate structure with water distribution and collection functions, which fully utilizes double cold plates, particularly a lower cold plate, in a laminated water cooling heat dissipation structure to achieve the aim of improving the heat dissipation efficiency.

The invention provides a heat dissipation cold plate structure with water distribution and collection functions, wherein an inner flow passage of the heat dissipation cold plate comprises an inlet flow passage and an outlet flow passage; the inlet channel has a water distribution effect and comprises a main inlet channel and n branch inlet channels; the outlet flow passage has a water collecting effect and comprises a main outlet flow passage, an outlet flow passage heat dissipation area and n branch outlet flow passages. Every branch inlet runner, divide the outlet runner and all correspond the blind-inserting water socket of heat dissipation cold drawing surface installation, 2n blind-inserting water sockets are installed at heat dissipation cold drawing surface altogether, correspond n and go up 2n blind-inserting water connectors of cold drawing. The outer surface of the cold plate is provided with a boss group, and the position of the boss group corresponds to the position of the heating element at the outer side of the upper cold plate.

The cooling liquid flows into the main inlet runner of the inlet runner through the cooling liquid inlet of the cold plate; after the cooling liquid passes through the inlet flow channel, the cooling liquid is divided into n paths with different flows, and each path of flow corresponds to different heat dissipation requirements of the upper cold plate; after the cooling liquid passes through the branch inlet channel, the cooling liquid flows into the upper cooling plate through the matching of the blind-plugging water socket on the outer surface of the cooling plate and the blind-plugging water plug on the upper cooling plate, and the components of the upper cooling plate are cooled.

After flowing through the upper cold plate, the cooling liquid flows into the branch outlet channel of the cold plate through the matching of the blind-plugging water plug of the upper cold plate and the blind-plugging water socket on the outer surface of the cold plate; the cooling liquid in the branch outlet flow passage is gradually gathered in the heat dissipation area of the outlet flow passage, flows into the main outlet flow passage and then flows out of the cold plate through the cooling liquid outlet of the main outlet flow passage. The heat dissipation area of the outlet flow passage of the flow passage in the cold plate is in a small-section flow passage form, and the area position corresponds to the boss group on the outer surface of the cold plate; the boss group consists of a series of bosses with different heights and different section sizes, the position, the size and the height of each boss correspond to the outer-layer heating element of the upper cold plate, and the top surface of each boss is connected with the outer-layer heating element of the upper cold plate through a heat-conducting gasket; the heat of the heating element is led into the cooling liquid in the cooling area of the cooling plate branch outlet flow passage through the heat-conducting gasket, the boss group and the cooling plate and is taken away along with the cooling liquid.

The heat dissipation cold plate structure provided by the invention has the advantages that the inner flow channel is reasonably arranged, so that the cold plate has the functions of water diversion and water collection, and meanwhile, the heat dissipation cooling is carried out on heating components outside the cold plate through the reasonable design of the inner flow channel and the matching of the boss group on the outer surface of the cold plate. Dividing water in the inlet flow channel of the cold plate, and cooling the heating element of each upper cold plate; the outer-layer heating element of the upper cold plate is cooled before water is collected by the cold plate outlet flow passage, so that the heat dissipation efficiency of the laminated water-cooling heat dissipation structure on the heating element is improved.

Compared with the prior art, the invention has the following advantages: on the premise of keeping the overall dimension of the original laminated water-cooling heat dissipation structure, the cold plate has the functions of water diversion and water collection, and meanwhile, the heat dissipation efficiency of the laminated water-cooling heat dissipation structure is improved.

Drawings

FIG. 1 is an isometric view of a heat sink cold plate.

FIG. 2 is a rear view of a flow passage in a heat sink cold plate.

FIG. 3 is a diagram of the relationship between the flow channels and the sets of bosses in the heat sink cold plate.

Fig. 4 is a schematic view of an embodiment of the present invention.

1. A coolant inlet; 2. a coolant outlet; 3. a boss group; 4. the electric plug passes the hole; 5. blind plugging a water socket; 6. a guide pin hole; 7. an upper cold plate mounting hole; 8. a primary inlet channel; 9. an inlet flow channel; 10. an outlet flow channel is divided; 11. an outlet flow channel heat dissipation area; 12. a primary outlet flow passage; 13. a heat generating element; 14. upper cooling plate

Detailed Description

The invention is further described with reference to the embodiments and the attached drawings.

As shown in fig. 1, the bottom of the cold plate is distributed with a cooling liquid inlet 1 and a cooling liquid outlet 2. Corresponding to the area of 1 upper

cold plate

14, 2 blind-

plug water sockets

5, 2

guide pin holes

6, 4 upper cold plate mounting holes 7, an electric plug through hole 4 and a boss group 3 are distributed on the outer surface of the cold plate. The features are distributed in an array on the cold plate corresponding to the array mounting of the upper cold plate 14 on the cold plate. Wherein an electrical plug passes through the cold plate for a module electrical plug mounted at the rear of the cold plate through the aperture 4 and connects with a module on the upper cold plate 14. The position of the boss group 3 corresponds to the position of the outer heating element 13 of the upper cold plate 14, the boss group 3 is composed of a series of bosses with different heights and different section sizes, the position, the size and the height of each boss correspond to the outer heating element 13 of the upper cold plate 14, and the top surface of each boss is connected with the upper cold plate heating element 13 through a heat conduction gasket.

As shown in fig. 2, the internal flow channels in the rear view of the cold plate are distributed, and the internal flow channels include a main inlet flow channel 8, an inlet flow channel 9, an outlet flow channel 10, an outlet flow channel heat dissipation area 11, and a main outlet flow channel 12. The primary inlet flow passage 8 and the primary outlet flow passage 12 correspond to the coolant inlet 1 and the coolant outlet 2 of the cold plate. Each of the inlet flow passage 9 and the outlet flow passage 10 corresponds to 1 blind-mate water outlet 5 in fig. 1. An outlet channel heat dissipation area 11 is arranged between the branch outlet channel 10 and the main outlet channel 12, and the cooling liquid is converged in the outlet channel heat dissipation area 11, absorbs heat conducted by an outer layer heating element 13 of the upper cooling plate 14, and then flows into the main outlet channel 12.

The cross-sectional areas of the main inlet flow channel 8 and the main outlet flow channel 12 are the same and are larger than the cross-sectional areas of the branch inlet flow channel 9 and the branch outlet flow channel 10; the cross-sectional areas of the branch inlet flow channel 9 and the branch outlet flow channel 10 are determined by simulation calculation of the heat dissipation requirements of the upper cooling plate 14 corresponding to each flow channel. The heat dissipation area 11 of the outlet flow passage is in the form of a multi-path small-section flow passage, the section of the flow passage is reduced, meanwhile, the cooling area is enlarged by adding the spacer ribs, and the total section area of the heat dissipation area 11 of the outlet flow passage is basically the same as that of the main outlet flow passage 12.

As shown in fig. 3, the relative position relationship between the boss group 3 and the inner flow channel distribution in the front view of the lower cooling plate. The outlet flow channel heat dissipation area 11 of the lower cold plate inner flow channel is located at the lower portion of the boss group 3, and heat of the boss group 3 and the outlet flow channel heat dissipation area 11 can be efficiently transferred.

As shown in fig. 4, the guide pins of the upper cold plate 14 are matched with the guide pin holes 6 of the cold plate to play a role of guiding and positioning, so that the blind-plugging water plugs of the upper cold plate 14 and the blind-plugging water sockets 5 of the cold plate are aligned and communicated, and screws penetrate through the cold plate from the rear part of the cold plate to fasten the upper cold plate 14 on the cold plate. The heat of the outer-layer heating element 13 of the upper cold plate 14 is led into the cooling liquid in the cold plate outlet flow channel heat dissipation area 11 through the heat conducting gasket and the boss group 3 and is taken away with the cooling liquid.

When the cold plate flow channel is used, the section size of the cold plate flow channel is estimated according to the total heat productivity of each heating element, the flow rate is determined, the flow channel trend is designed according to the position of the heating element 13, and the drift diameters of the blind-plug water plug and the blind-plug water socket 5 are reasonably selected according to the flow rate.

Claims

1. The utility model provides a cold plate structure of heat dissipation with divide water, water-collecting function which characterized in that: the inner flow passage of the heat dissipation cold plate comprises an inlet flow passage and an outlet flow passage; the inlet channel has a water distribution effect and comprises a main inlet channel and n branch inlet channels; the outlet flow channel has a water collecting effect and comprises a main outlet flow channel, an outlet flow channel heat dissipation area and n branch outlet flow channels; each branch inlet flow channel and each branch outlet flow channel correspond to blind-plugging water sockets arranged on the outer surface of the heat dissipation cold plate, and 2n blind-plugging water sockets are arranged on the outer surface of the heat dissipation cold plate in total and correspond to 2n blind-plugging water connectors of the n upper cold plates; the outer surface of the cold plate is provided with a boss group, and the position of the boss group corresponds to the position of the heating element at the outer side of the upper cold plate.

2. The structure of the heat-dissipating cold plate with the functions of water diversion and water collection as claimed in claim 1, wherein: the boss group on the outer surface of the cold plate is composed of a series of bosses with different heights and different section sizes, the position, the size and the height of each boss correspond to the outer-layer heating element of the upper cold plate, and the top surface of each boss is connected with the outer-layer heating element of the upper cold plate through a heat conduction gasket.

3. The structure of the heat-dissipating cold plate with the functions of water diversion and water collection as claimed in claim 2, wherein: the heat dissipation area of the outlet flow passage of the flow passage in the cold plate is in a small-section flow passage form, the section of the flow passage is small, and the cooling area is large; the outlet flow channel heat dissipation area of the flow channel in the cold plate is located at the lower part of the boss group on the outer surface of the cold plate, and the heat of the outer-layer heating element of the upper cold plate is conducted to the cooling liquid in the outlet flow channel heat dissipation area through the heat-conducting gasket, the boss group and the outlet flow channel heat dissipation area of the cold plate and is taken away along with the cooling liquid.

4. The structure of the heat-dissipating cold plate with the functions of water diversion and water collection as claimed in claim 3, wherein: the cold plate is provided with an electric plug through hole, the position of the electric plug through hole corresponds to that of the upper cold plate, and a module electric plug arranged at the rear part of the cold plate penetrates through the cold plate and is connected with a module on the upper cold plate.