TWI804981B - Condenser and open loop two phase cooling system - Google Patents

Abstract

A condenser includes a first outer plate, a second outer plate, at least one first inner partition, and at least one second inner partition. The first outer plate has a first inlet, a first outlet, a second inlet, and a second outlet. At least one first inner partition and at least one second inner partition are sandwiched between the first outer plate and the second outer plate, and At least one first channel and at least one second channel are form between the first outer plate and the second outer plate. The at least one first channel is used for receiving a cooling fluid, and the second inlet communicates with the second outlet through the at least one first channel. The at least one second channel is used for receiving a two-phase fluid, and the first inlet is connected to the first outlet through the at least one second channel. The opening size of the first inlet is larger than the opening size of the first outlet.

Description

Condenser and open two-phase cooling system

The invention relates to a condenser and a cooling system, in particular to a condenser and an open two-phase cooling system.

With the rapid development of technology, especially in the era of greatly increased demand for network, artificial intelligence, and cloud services, the amount of data that data centers need to process is increasing. In order to maintain or improve the processing efficiency of data centers , it is necessary to continuously and effectively dissipate heat from the data center. However, due to the high power density of the data center, the heat generated is too large, and the traditional heat dissipation methods need to respond by increasing power or scale. However, such an approach is very energy-intensive, which greatly increases the cost and the impact on the environment.

Therefore, in recent years, water cooling technologies such as immersion cooling have been paid more and more attention. In addition to effectively cooling the data center to greatly reduce energy consumption and cost, it can also effectively reduce the overall size of the data center. Specifically, immersion cooling technology is to immerse the heat source of the data center, such as the motherboard and the electronic components on it, in a non-conductive cooling liquid, so that the heat generated by the electronic components can be directly and quickly transferred to the cooling liquid, no longer Additional active cooling devices such as fans need to be provided, thereby improving heat dissipation efficiency and helping to increase the placement density of hardware.

As the amount of data to be processed becomes larger and larger, the waste heat generated by the data center becomes larger and larger. Therefore, the current immersion cooling system also starts to use a condenser to condense the working fluid of the immersion cooling system. However, the existing condenser still has the problem of insufficient heat dissipation efficiency.

The present invention provides a condenser and an open two-phase cooling system, so as to improve the cooling efficiency of the condenser.

A condenser disclosed in an embodiment of the present invention includes a first outer plate, a second outer plate, at least one first inner partition and at least one second inner partition. The first outer plate has a first inlet, a first outlet, a second inlet and a second outlet. At least one first inner partition and at least one second inner partition are sandwiched between the first outer panel and the second outer panel, and at least one first outer panel that is not connected is separated between the first outer panel and the second outer panel. A channel and at least one second channel. At least one first channel is used for a cooling fluid, and the second inlet communicates with the second outlet through the at least one first channel. At least one second channel is used for containing a two-phase fluid, and the first inlet communicates with the first outlet through the at least one second channel. Wherein the opening size of the first inlet is larger than the opening size of the first outlet.

Another embodiment of the present invention discloses an open two-phase cooling system comprising at least one immersion servo device, a condenser, a liquid storage tank and a fluid driver. The condenser communicates with at least one immersion servo device. The liquid storage tank is communicated with at least one immersion servo device. The coolant monitoring host is connected to the condenser. The fluid driver communicates with the reservoir. Wherein, the condenser includes a first outer plate, a second outer plate, at least one first inner partition and at least one second inner partition. The first outer plate has a first inlet, a first outlet, a second inlet and a second outlet. At least one first inner partition and at least one second inner partition are sandwiched between the first outer panel and the second outer panel, and at least one first outer panel that is not connected is separated between the first outer panel and the second outer panel. A channel and at least one second channel. At least one first channel is used for a cooling fluid, and the second inlet communicates with the second outlet through the at least one first channel. At least one second channel is used for containing a two-phase fluid, and the first inlet communicates with the first outlet through the at least one second channel. Wherein the opening size of the first inlet is larger than the opening size of the first outlet.

According to the condenser and the open two-phase cooling system of the above-mentioned embodiment, since the volume of the gaseous working fluid is larger than that of the liquid working fluid, the opening size of the first inlet is designed to be larger than the opening size of the first outlet to effectively improve the Cooling performance of the condenser.

The above description of the content of the present invention and the following description of the implementation are used to demonstrate and explain the principle of the present invention, and provide further explanation of the patent application scope of the present invention.

See Figures 1 through 3. FIG. 1 is a schematic perspective view of a condenser 20 according to a first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of FIG. 1 . FIG. 3 is an exploded schematic diagram of FIG. 2 . FIG. 4 is a schematic cross-sectional view of another viewing angle of FIG. 1 . FIG. 5 is a system diagram of an open two-phase cooling system 1 with the condenser 20 of FIG. 1 .

The condenser 20 in this embodiment is, for example, a plate heat exchanger. The condenser 20 includes a first outer plate 100 and a second outer plate 200 , a plurality of first inner partitions 300 and a plurality of second inner partitions 400 . The first outer plate 100 has a first inlet 110 , a first outlet 120 , a second inlet 130 and a second outlet 140 . The first outlet 120 communicates with the first inlet 110 . The second outlet 140 communicates with the second inlet 130 , and the second outlet 140 does not communicate with the first outlet 120 . That is to say, the first inlet 110 and the first outlet 120 are the inlet and outlet of one channel, and the second inlet 130 and the second outlet 140 are the inlet and outlet of the other channel. The first inlet 110 is used for gaseous working fluid to flow in, and the first outlet 120 is used for condensed liquid working fluid to flow out. The working fluid is, for example, a dielectric fluid. The second inlet 130 is used for cooling fluid to flow in, and the second outlet 140 is used for cooling fluid to flow out. The cooling fluid is, for example, water or refrigerant.

The second outer panel 200 is spaced apart from the first outer panel 100 . The first inner partitions 300 and the second inner partitions 400 are alternately arranged in the order of the first inner partitions 300 and the second inner partitions 400 from the first outer panel 100 to the second outer panel 200 . That is to say, the first outer panel 100 , the first inner partition 300 , the second inner partition 400 , the first inner partition 300 , and the second inner partition 400 are arranged in order, and then closed by the second outer panel 200 The outermost second inner partition 400 .

These first inner partitions 300 and these second inner partitions 400 are sandwiched between the first outer panel 100 and the second outer panel 200 and separated from the first outer panel 100 and the second outer panel 200 without communication. A plurality of first channels S1 and a plurality of second channels S2. The first passages S1 and the second passages S2 are arranged in the order of the first passages S1 and the second passages S2 from the first outer panel 100 to the second outer panel 200 . That is to say, they are arranged in the order of the first channel S1, the second channel S2, the first channel S1, and the second channel S2.

The first inlet 110 and the first outlet 120 of the first outer plate 100 respectively communicate with the second passages S2 through a plurality of first deflectors 510 . That is to say, the first inlet 110 and the first outlet 120 are not communicated with the first channel S1 through the barriers of the first deflectors 510 .

The second inlet 130 and the second outlet 140 of the first outer plate 100 respectively communicate with the first passages S1 through a plurality of second deflectors 520 . That is to say, the second inlet 130 and the second outlet 140 cannot communicate with the second channel S2 through the barrier of the second deflectors 520 .

In addition, the first inlet 110 is used for a two-phase fluid to flow in and flow out from the first outlet 120 through the second channel S2. The second inlet 130 is used for a cooling fluid to flow in and flow out from the second outlet 140 through the first passage S1.

Specifically, the two-phase fluid will change from liquid to gas when passing through the heat source, and the heat generated by the heat source will be taken away by the two-phase transition from liquid to gas. The gaseous two-phase fluid flows in from the first inlet 110 , and flows out from the first outlet 120 after being condensed by the cooling fluid in the first channel S1 to a liquid state in the second channel S2 .

In this embodiment, the opening size of the first inlet 110 is larger than the opening size of the first outlet 120 . Assuming that the cross-sectional shapes of the first inlet 110 and the first outlet 120 are circular, that is, the diameter of the first inlet 110 is larger than the diameter of the first outlet 120 . Since the volume of the gaseous working fluid is larger than that of the liquid working fluid, the opening size of the first inlet 110 is designed to be larger than the opening size of the first outlet 120 to effectively improve the heat dissipation performance of the condenser 20 .

In this embodiment, in the arrangement direction E of the first inner partitions 300 and the second inner partitions 400 , the length L1 of the second passages S2 is greater than the length L2 of the first passages S1 . Considering the difference in heat transfer capability between gas and liquid, in the design, the gaseous working fluid flows in the second channel S2 with a longer length L1, and the cooling fluid flows in the first channel S1 with a shorter length L2, so as to facilitate further The cooling efficiency of the condenser 20 is improved.

See Figure 4. FIG. 4 is a schematic cross-sectional view of another viewing angle of FIG. 1 . In this embodiment, the condenser 20 may also include a plurality of capillary structures 600 . These capillary structures 600 are respectively located at the downstream of these second channels S2, that is to say, these capillary structures 600 are respectively located at the position of these second channels S2 adjacent to the first outlet 120, so that the width of the second channel S2 at the entrance is larger than The width of the exit. In detail, since the gaseous working fluid is gradually condensed into a liquid working fluid in the second channel S2, that is, the amount of vapor at the downstream of the second channel S2 is relatively low and the amount of liquid is relatively high, so in order to enhance the effect of recovering the liquid working fluid, A capillary structure 600 may be added downstream of the second flow channel. In addition, although the setting of the capillary structure 600 will reduce the width of the downstream of the second channel S2 and increase the flow resistance of the downstream of the second channel S2, because the gaseous working fluid downstream of the second channel S2 is less, so Overall, the arrangement of the capillary structure 600 can improve the recovery of the liquid working fluid without affecting the circulation efficiency of the working fluid.

In this embodiment, the level of the first inlet 110 is higher than that of the second inlet 130 . That is, the cooling fluid flows from bottom to top in the first channel S1 , and the working fluid flows from top to bottom in the second channel S2 . The reason why the working fluid flows from top to bottom is that the working fluid flows from top to bottom along the direction of gravity, which is conducive to the recovery of liquid working fluid, and the flow direction of gaseous working fluid also flows from top to bottom along the direction of gravity, which can avoid liquid working fluid and gaseous working fluid. The working fluids interfere with each other to affect the flow rate of the liquid working fluid and the gaseous working fluid. The reason why the flow direction of the cooling fluid and the working fluid is opposite is that the higher the temperature difference between the cooling fluid and the working fluid, the greater the amount of heat exchange between the two, so the cooling fluid flows from bottom to top in the first channel S1, and let The working fluid flows from top to bottom in the second channel S2.

In this embodiment, the number of the first inner partitions 300 and the second inner partitions 400 is multiple as an example, but it is not limited thereto. In other embodiments, the number of the first inner partition and the second inner partition can also be changed to a single one.

The application of the condenser 20 in the embodiment of FIG. 1 to an open two-phase cooling system 1 will be introduced below. See Figure 5. FIG. 5 is a system diagram of an open two-phase cooling system 1 with the condenser 20 of FIG. 1 . In this embodiment, the open two-phase cooling system 1 includes an immersion servo device 10 , a condenser 20 , a liquid storage tank 30 , a coolant monitoring host 40 (CDU) and a fluid driver 50 .

The immersion servo device 10 , the condenser 20 , the liquid storage tank 30 and the fluid driver 50 are connected, and the working fluid forms a first cooling cycle in the immersion servo device 10 , the condenser 20 and the liquid storage tank 30 . The condenser 20 communicates with the cooling fluid monitoring host 40 , and the cooling fluid forms a second cooling cycle in the condenser 20 and the cooling fluid monitoring host 40 .

According to the condenser and the open two-phase cooling system of the above-mentioned embodiment, since the volume of the gaseous working fluid is larger than that of the liquid working fluid, the opening size of the first inlet is designed to be larger than the opening size of the first outlet to effectively improve the Cooling performance of the condenser.

In addition, in the arrangement direction of the first internal partitions and the second internal partitions, the gaseous working fluid flows in the second channel with a longer length, and the cooling fluid flows in the first channel with a shorter length, so that It is beneficial to further improve the heat dissipation efficiency of the condenser.

In addition, since the capillary structures are respectively located downstream of the second passages, the recovery of the liquid working fluid can be improved without affecting the circulation efficiency of the working fluid.

In one embodiment of the present invention, the immersion server device of the present invention can be used for artificial intelligence (AI) computing, edge computing (Edge Computing), and can also be used as a 5G server, cloud server or vehicle Internet server use

Although the present invention is disclosed above with the foregoing embodiments, it is not intended to limit the present invention. Any person familiar with similar skills may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of patent protection for inventions shall be defined in the scope of patent application attached to this specification.

1: Open two-phase cooling system 10: Immersion Servo 20: Condenser 30: reservoir 40: Coolant monitoring host 50: Fluid Driver 100: the first outer panel 110: The first entrance 120: The first exit 130: Second entrance 140: The second exit 200: second outer panel 300: the first inner partition 400: Second inner partition 510: The first deflector 520: Second deflector 600: capillary structure E: Arrangement direction L1, L2: Length S1: first channel S2: second channel

FIG. 1 is a schematic perspective view of a condenser according to a first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of FIG. 1 . FIG. 3 is an exploded schematic diagram of FIG. 2 . FIG. 4 is a schematic cross-sectional view of another viewing angle of FIG. 1 . FIG. 5 is a system schematic diagram of an open two-phase cooling system with the condenser of FIG. 1 .

20: Condenser

100: the first outer panel

110: The first entrance

120: The first exit

130: Second entrance

140: The second exit

200: second outer panel

300: the first inner partition

400: Second inner partition

Claims (10)

A condenser comprising: a first outer panel having a first inlet, a first outlet, a second inlet, and a second outlet; a second outer panel; and at least one first inner partition and at least one second inner partition, Interposed between the first outer panel and the second outer panel, at least one first channel and at least one second channel that are not connected are separated between the first outer panel and the second outer panel. A first channel is used to accommodate a cooling fluid, and the second inlet communicates with the second outlet through the at least one first channel, the at least one second channel is used to accommodate a two-phase fluid, and the first inlet The at least one second channel communicates with the first outlet; wherein the opening size of the first inlet is larger than the opening size of the first outlet. The condenser as described in Claim 1 further comprises a plurality of first deflectors and a plurality of second deflectors, the at least one first inner partition, at least one second inner partition, the at least one first The number of channels and the at least one second channel is multiple, and the first inner partitions and the second inner partitions are from the first outer panel to the second outer panel according to the first inner partition and the second inner partitions. The order of the second inner partitions is staggered, and the first passages and the second passages are arranged in the order of the first passages and the second passages from the first outer plate toward the second outer plate. The first inlet and the first outlet of the first outer plate respectively communicate with the second passages through the first guide plates, and the second inlet and the second outlet of the first outer plate pass through the first deflectors. The two deflectors communicate with the first passages respectively. The condenser according to claim 2, wherein the length of the second passages is greater than the length of the first passages in the direction in which the first inner partitions and the second inner partitions are arranged. The condenser according to claim 1 further comprises a plurality of capillary structures, wherein the capillary structures are respectively located downstream of the second passages. The condenser according to claim 1, wherein the level of the first inlet is higher than the level of the second inlet. An open two-phase cooling system comprising: At least one immersion servo device; a condenser, connected to the at least one immersion servo device; a liquid storage tank, connected to the at least one immersion servo device; a coolant monitoring host, connected to the condenser; and a The fluid driver is connected to the liquid storage tank; wherein, the condenser includes: a first outer plate having a first inlet, a first outlet, a second inlet and a second outlet; a second outer plate and at least one first inner partition and at least one second inner partition sandwiched between the first outer panel and the second outer panel and separated between the first outer panel and the second outer panel At least one first channel and at least one second channel that are not connected, the at least one first channel is used to accommodate a cooling fluid, and the second inlet communicates with the second outlet through the at least one first channel, the at least one A second channel is used for containing a two-phase fluid, and the first inlet communicates with the first outlet through the at least one second channel; wherein the opening size of the first inlet is larger than the opening size of the first outlet. The open two-phase cooling system as described in Claim 6 further comprises a plurality of first deflectors and a plurality of second deflectors, the at least one first inner partition, at least one second inner partition, the The number of the at least one first channel and the at least one second channel is multiple, and the first inner partitions and the second inner partitions move from the first outer panel toward the second outer panel according to the first The order of the inner partition and the second inner partition is staggered, and the first channels and the second channels are from the first outer plate to the second outer plate in accordance with the first channel and the second channel Arranged sequentially, the first inlet and the first outlet of the first outer plate communicate with the second passages respectively through the first guide plates, and the second inlet and the second outlet of the first outer plate communicate with the first passages respectively through the second deflectors. The open two-phase cooling system as claimed in item 7, wherein in the arrangement direction of the first inner partitions and the second inner partitions, the length of the second passages is longer than that of the first passages length. The open two-phase cooling system as claimed in Claim 6 further comprises a plurality of capillary structures, wherein the capillary structures are respectively located downstream of the second passages. The open two-phase cooling system as claimed in claim 6, wherein the level of the first inlet is higher than the level of the second inlet.

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