TW201925947A - Heat dissipation control method and immersion cooling system thereof - Google Patents

Abstract

A heat dissipation control method is applied to an immersion cooling apparatus for cooling a heat generating member. The immersion cooling apparatus includes a chamber, a fan device, and a pump communicated with the chamber and the fan device for transmitting steam generated by the cooling solution to the fan device and transmitting the cooling solution to the chamber. The heat generating member is immersed in a cooling solution stored in the chamber. The fan device cools the steam into liquid. The heat dissipation control method includes utilizing a sensing device to detect a steam temperature, the sensing device preferentially increasing power of the pump when determining the steam temperature is larger than a maximum of a temperature control range, and the sensing device preferentially decreasing power of the fan device when determining the steam temperature is less than a minimum of the temperature control range.

Description

Heat dissipation control method and immersion cooling system thereof

The present invention relates to a heat dissipation control method and an immersion cooling system thereof, and more particularly to a heat dissipation control method for using a sensing processing device to detect a vapor temperature of a coolant to preferentially adjust an operating power of a pump device or a fan device, and immersion cooling thereof system.

In general, the immersion cooling system uses a heating element (such as a blade type servo, a disk array, etc.) to be immersed in the coolant stored in the coolant tank, and the vapor generated by the heat absorption of the coolant removes the heating element. In the operation of the thermal energy, the fan device is used to cool the vapor back to the liquid and the liquid-gas two-phase conversion process sent back by the pump device to generate heat dissipation effect. However, since the conventional immersion cooling system does not optimize the heat dissipation power consumption, only the staff manually adjusts the operating power of the fan unit and the pump unit according to the practical experience or directly connects the fan unit and the pump. The operating power of the pump is adjusted to the highest, so the immersion cooling system often causes time and labor and considerable power consumption in the heat control operation.

It is an object of the present invention to provide a heat dissipation control method for detecting the operating power of a pump device or a fan device using a sensing processing device to detect the vapor temperature of the coolant, and an immersion cooling system thereof to solve the above problems.

According to an embodiment, the heat dissipation control method of the present invention is applied to an immersion cooling device that dissipates heat from a heat generating component. The immersion cooling device comprises a coolant tank, a pumping device, and a fan device, wherein the heating element is immersed in the coolant stored in the coolant tank, the fan device is configured to absorb the coolant into the heating element The steam generated by the thermal energy is cooled back to the liquid, the pumping device is in communication with the coolant tank and the fan unit for sending steam to the fan unit and for returning the coolant cooled back to the liquid to the coolant groove. The heat dissipation control method includes the initialization of at least one cooling-related parameter during the startup of the immersion cooling device, and detecting a vapor temperature in the coolant tank by using a sensing processing device, wherein the sensing processing device determines the Preferably, when the vapor temperature is greater than a maximum value of a temperature control range, the operating power of the pumping device is preferentially increased, and the sensing processing device preferentially lowers the fan device when determining that the vapor temperature is less than a minimum value of a temperature control range Operating power.

According to another embodiment, the immersion cooling system of the present invention is used to dissipate heat from a heat generating component comprising an immersion cooling device and a sensing processing device. The immersion cooling apparatus includes a coolant tank, a fan unit, and a pump unit. The coolant tank is used for storing a coolant and accommodating the heat generating component to immerse the heat generating component in the coolant. The fan unit is configured to cool the vapor generated by the coolant when absorbing heat energy of the heat generating component back to the liquid. The pumping device is in communication with the coolant tank and the fan unit for delivering steam to the fan unit and for returning coolant cooled back to the liquid tank. The sensing processing device is electrically connected to the immersion cooling device for detecting a vapor temperature in the coolant tank, and preferentially raising the pump device when it is determined that the vapor temperature is greater than a maximum value of a temperature control range The operating power, and the operating power of the fan device is preferentially reduced when it is determined that the vapor temperature is less than a minimum of a temperature control range.

Compared with the prior art, the operating power of the pumping device with low power consumption is preferentially increased in the case of overheating of the steam temperature, and the operation of the fan device with high power consumption is preferentially reduced in the case where the steam temperature is too low. The invention discloses an automatic monitoring method for power, and the invention can effectively solve the problem that the immersion cooling system mentioned in the prior art is time-consuming and labor-consuming and consumes electricity in the heat-dissipating control operation, thereby greatly improving the heat-dissipating control of the immersion cooling system. It is easy to operate and achieves energy saving.

The advantages and spirit of the present invention will be further understood from the following embodiments and the accompanying drawings.

Please refer to FIG. 1 , which is a functional block diagram of an immersion cooling system 10 according to an embodiment of the present invention. The immersion cooling system 10 is used for a heating element 12 (such as a blade type servo, magnetic The dish array or the like performs heat dissipation. As shown in FIG. 1, the immersion cooling system 10 includes an immersion cooling device 14 and a sensing processing device 16. The immersion cooling device 14 includes a coolant tank 18, a fan unit 20, and a pump unit 22. The coolant tank 18 can be a coolant storage tank chamber commonly used in immersion cooling equipment (the relevant tank chamber design is common in the prior art, so it will not be described here) and is used to store a coolant 24 And accommodating the heating element 12 so that the heating element 12 can be immersed in the cooling liquid 24, wherein the cooling liquid 24 can be an inert dielectric liquid (such as mineral oil, polyoxygenated oil, etc.) commonly used for immersion cooling. The fan unit 20 is for cooling the vapor generated by the cooling liquid 24 when absorbing the thermal energy of the heat generating element 12 back to the liquid. The pumping device 22 is in communication with the coolant tank 18 and the fan unit 20 for sending steam to the fan unit 20 for cooling and for returning the coolant 24 cooled back to the coolant tank 18. The sensing processing device 16 is electrically coupled to the immersion cooling device 14 for monitoring the immersion cooling device 14 with the associated values of the cooling and the vapor temperature of the coolant bath to ensure smooth operation of the immersion cooling device 14 as well. Sensing principles for sensing processing device 16 (eg, system temperature sensing, coolant flow sensing, pumping speed sensing, fan speed sensing, system pressure sensing, level sensing, and vapor temperature sensing) The related descriptions are common in the prior art, and thus will not be described again. In addition, in this embodiment, the immersion cooling device 14 may further include a filter pump 26 that communicates with the coolant tank 18 for impurities in the coolant 24 stored in the coolant tank 18. (such as tiny foreign matter adhering to the heating element 12) is filtered out to prevent heat dissipation problems caused by impurity deposition and electrical short-circuit problems due to conductivity of impurities.

For the heat dissipation control method of the immersion cooling system 10, please refer to FIG. 1 and FIG. 2, and FIG. 2 is a flow chart of a heat dissipation control method according to an embodiment of the present invention. The control method consists of the following steps.

Step 200: The immersion cooling device 14 initializes cooling related parameters during startup.

Step 202: The sensing processing device 16 determines whether the cooling related parameter is abnormal; if yes, step 204 is performed; if not, step 206 is performed.

Step 204: Turn off the immersion cooling device 14.

Step 206: The sensing processing device 16 determines whether the vapor temperature of the coolant tank 18 is greater than the maximum value of the temperature control range; if yes, step 208 is performed; if not, step 214 is performed.

Step 208: The sensing processing device 16 determines whether the operating power of the pumping device 22 has risen to the highest; if yes, step 210 is performed; if not, step 212 is performed.

Step 210: The sensing processing device 16 boosts the operating power of the fan device 20.

Step 212: The sensing processing device 16 boosts the operating power of the pumping device 22.

Step 214: The sensing processing device 16 determines whether the vapor temperature of the coolant tank 18 is less than the minimum value of the temperature control range; if yes, step 216 is performed; if not, step 222 is performed.

Step 216: The sensing processing device 16 determines whether the operating power of the fan device 20 has been reduced to a minimum; if yes, step 218 is performed; if not, step 220 is performed.

Step 218: The sensing processing device 16 reduces the operating power of the pumping device 22.

Step 220: The sensing processing device 16 reduces the operating power of the fan device 20.

Step 222: The sensing processing device 16 turns on the filter pump 26 to filter the coolant 24 when the immersion cooling device 14 is turned on.

Step 224: The sensing processing device 16 periodically turns on the filtered pump 26 to filter the coolant.

The following is a detailed description of the above steps. First, in step 200, the immersion cooling device 14 can perform a power-on operation to dissipate heat from the heat generating component 12, during which the immersion cooling device 14 can perform initialization of cooling related parameters for the immersion cooling device 14. In order for the immersion cooling device 14 to dissipate heat from the heating element 12 under suitable cooling related parameter settings, wherein the cooling related parameters may preferably include system temperature, coolant flow rate, pump speed, fan speed, system pressure And the level of the coolant level (but not limited to this, it may be increased or decreased according to the actual heat control requirements of the immersion cooling device 14). Next, the sensing processing device 16 can monitor the cooling related parameter during the startup of the immersion cooling device 14 and determine whether the abnormality is determined (step 202), if the sensing processing device 16 determines the cooling related parameter. If an abnormality occurs (such as excessive system temperature, too slow coolant flow rate, low pump speed, low fan speed, high system pressure, and low coolant level), the immersion cooling device will be shut down. After the immersion cooling device 14 is overhauled, the above cooling related parameters are all returned to the normal value and then turned on, thereby achieving the effect of protecting the immersion cooling device 14.

After the detection of the cooling-related parameters is completed, the sensing processing device 16 can monitor the temperature of the vapor generated by the cooling liquid 24 when absorbing the thermal energy of the heating element 12 and adjust the operating power of the fan device 20 or the pumping device 22 accordingly. The heat dissipation power consumption of the immersion cooling device 14 is optimized. In more detail, in step 206, the sensing processing device 16 can be used to determine whether the vapor temperature of the coolant tank 18 is greater than the maximum value of the temperature control range. The temperature control range mentioned herein can preferably be The temperature range formed by the boiling point temperature of the coolant ± the hysteresis temperature (the immersion cooling system 10 allows the operating temperature to be exceeded) is defined (but not limited thereto, it may also be expanded or reduced according to practical experience) . When the sensing processing device 16 determines that the vapor temperature of the coolant tank 18 is greater than the maximum value of the temperature control range, which means that the immersion cooling system 10 is in an overheated state, the sensing processing device 16 can improve the immersion cooling device. 14 heat dissipation capabilities.

In practical applications, since the power consumption of the pumping device 22 is lower than the power consumption of the fan device 20, the sensing processing device 16 can preferentially increase the operating power of the pumping device 22 under the consideration of energy saving and power saving. That is, the sensing processing device 16 can first determine whether the operating power of the pumping device 22 has risen to the highest (step 208); if the sensing processing device 16 determines that the operating power of the pumping device 22 has not risen to the highest The sensing processing device 16 can continue to increase the operating power of the pumping device 22 (step 212, for example, increasing the rotational speed of the pumping device 22 by Pulse Width Modulation (PWM)) until the coolant tank 18 The vapor temperature drops to within the temperature control range; conversely, if the sensing processing device 16 determines that the operating power of the pumping device 22 has risen to the highest, but the vapor temperature of the coolant tank 18 is still greater than the maximum value of the temperature control range, The sensing processing device 16 can increase the operating power of the fan device 20 (step 210, for example, increasing the rotational speed of the fan device 20 in a pulse width modulation manner), so that the vapor temperature of the coolant tank 18 can be the same. It means the case where the lift pump 22 into the operating power of the fan device 20 is controlled in the range down to the ground quickly, in order to avoid overheating of an immersion cooling system 10.

On the other hand, in step 214, the sensing processing device 16 can be used to determine whether the vapor temperature of the coolant tank 18 is less than the minimum value of the temperature control range. When the sensing processing device 16 determines that the vapor temperature of the coolant tank 18 is less than When the temperature control range is at a minimum, this means that the immersion cooling system 10 has to properly reduce the heat dissipation capability. As described above, in practical applications, since the power consumption of the pumping device 22 is lower than the power consumption of the fan device 20, the sensing device 16 can preferentially reduce the fan device 20 under the consideration of energy saving and power saving. The operating power, that is, the sensing processing device 16 can first determine whether the operating power of the fan device 20 has been minimized (step 216); if the sensing processing device 16 determines that the operating power of the fan device 20 has not decreased At a minimum, the sensing processing device 16 can continue to reduce the operating power of the fan device 20 (step 220, for example, reducing the rotational speed of the fan device 20 in a pulse width modulation manner) until the vapor temperature of the coolant tank 18 rises to within the temperature control range. On the other hand, if the sensing processing device 16 determines that the operating power of the fan device 20 has been reduced to a minimum, but the vapor temperature of the coolant tank 18 is still less than the minimum value of the temperature control range, the sensing processing device 16 can lower the pump. The operating power of the pump device 22 (step 218, for example, reducing the rotational speed of the pump device 22 in a pulse width modulation manner), so that the vapor temperature of the coolant tank 18 can simultaneously reduce the pumping load 22 rises to within the operating temperature range and a case where the power of the fan device 20.

In this way, the operating power of the pump device with low power consumption is preferentially increased in the case of overheating of the steam temperature, and the operating power of the fan device having high power consumption is preferentially lowered in the case where the steam temperature is too low. The invention provides an automatic monitoring method, which can effectively solve the problem that the immersion cooling system mentioned in the prior art is time-consuming and labor-intensive and consumes electricity in the heat-dissipating control operation, thereby greatly improving the heat-dissipating control operation of the immersion cooling system. The simplicity and energy saving effect.

In addition, in step 222, the sensing processing device 16 can open the filter pump 26 to filter the coolant 24 stored in the coolant tank 18 during the startup of the immersion cooling device 14, thereby reliably The problem of poor heat dissipation due to deposition of impurities in the immersion cooling device 14 and the problem that the heat generating element 12 is electrically short-circuited due to the conductivity of the impurities are solved. In addition, since the immersion cooling device 14 is still prone to the above problems after a period of operation, in step 224, the sensing processing device 16 periodically turns on the filter pump 26 according to a specific time (for example, one week). The coolant 24 stored in the coolant tank 18 is filtered out of impurities, that is, the sensing device 16 is in addition to the filter pump 26 being filtered immediately after the immersion cooling device 14 is turned on. It is determined that when the operation time of the immersion cooling device 14 after the power-on has exceeded a multiple of the above specific time (for example, one week, two weeks, etc.), the filter pump 26 is turned on to filter the coolant 24 again to ensure that the immersion cooling device 14 can be smoothly performed. The heat generating element 12 is radiated.

It is worth mentioning that, in the above, the step of determining whether the cooling related parameter is abnormal, the filtering pump is turned on at the time of turning on, and the step of periodically turning on the filtering pump may be an elliptable step. For example, in another embodiment, The invention can simplify the heat dissipation of the present invention by using only the monitoring of the vapor temperature of the coolant and the operation power of the fan device or the pump device to optimize the heat dissipation power consumption of the immersion cooling device. Control design. For the description of other derivational variants (such as the embodiment of determining whether the cooling-related parameters are abnormal and the monitoring of the vapor temperature, etc.), reference may be made to the analogy of the above embodiments, and details are not described herein again. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10‧‧‧Immersion cooling system

12‧‧‧heating components

14‧‧‧Immersion cooling equipment

16‧‧‧Sensing device

18‧‧‧ coolant tank

20‧‧‧Fan device

22‧‧‧ pumping device

24‧‧‧ Coolant

26‧‧‧Filter pump

Steps 200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224 ‧

1 is a functional block diagram of an immersion cooling system in accordance with an embodiment of the present invention. 2 is a flow chart of a heat dissipation control method according to an embodiment of the present invention.

Claims (10)

A heat dissipation control method is applied to an immersion cooling device for dissipating heat from a heat generating component, the immersion cooling device comprising a coolant tank, a pumping device, and a fan device, wherein the heat generating component is immersed in the coolant tank In the stored cooling liquid, the fan device is configured to cool the vapor generated by the cooling liquid in absorbing the thermal energy of the heating element back to the liquid, and the pumping device is connected to the cooling liquid tank and the fan device for The steam is sent to the fan device and the coolant for cooling back to the liquid is sent back to the coolant tank. The heat dissipation control method comprises: initializing at least one cooling related parameter during the booting of the immersion cooling device; The sensing processing device detects a vapor temperature in the coolant tank; the sensing processing device preferentially increases the operating power of the pumping device when determining that the vapor temperature is greater than a maximum value of a temperature control range; The sensing processing device preferentially reduces the operating power of the fan device when it is determined that the vapor temperature is less than a minimum value of a temperature control range. The heat dissipation control method of claim 1, wherein the step of preferentially increasing the operating power of the pumping device by the sensing processing device comprises: when the operating power of the pumping device has been raised to a maximum and the vapor temperature is greater than the temperature control At the maximum of the range, the sensing processing device boosts the operating power of the fan device. The heat dissipation control method of claim 1, wherein the step of preferentially reducing the operating power of the fan device comprises: when the operating power of the fan device has been minimized and the vapor temperature is less than the temperature control range At the minimum value, the sensing processing device reduces the operating power of the pumping device. The heat dissipation control method of claim 1, further comprising: detecting, during the startup of the immersion cooling device, whether the at least one cooling related parameter of the immersed cooling device is abnormal to generate a detective And the sensing processing device controls the switch of the immersion cooling device according to the detection result; wherein the at least one cooling related parameter comprises a system temperature, a coolant flow rate, a pump rotation speed, a fan rotation speed, and a At least one of system pressure and a coolant level. The heat dissipation control method of claim 1, wherein the immersion cooling device further comprises a filter pump, the heat dissipation control method further comprising: the sensing processing device turning on the filter pump when the immersion cooling device is turned on The coolant stored in the coolant bath is filtered out of impurities. An immersion cooling system for dissipating heat from a heat generating component, the immersion cooling system comprising: an immersion cooling device comprising: a coolant bath for storing a coolant and accommodating the heat generating component, So that the heating element is immersed in the cooling liquid; a fan device for cooling the vapor generated by the cooling liquid in absorbing the heat energy of the heating element back to the liquid; and a pumping device communicating with the cooling liquid tank and The fan device for sending steam to the fan device and for returning the coolant cooled back to the liquid to the coolant tank; and a sensing processing device electrically connected to the immersion cooling device for detecting Detecting a steam temperature in the coolant tank, preferentially increasing the operating power of the pumping device when determining that the steam temperature is greater than a maximum value of a temperature control range, and determining that the steam temperature is less than a temperature control range A minimum value preferentially reduces the operating power of the fan unit. The immersion cooling system of claim 6, wherein the sensing processing device lifts the fan device when the operating power of the pumping device has been raised to a maximum and the vapor temperature is greater than the maximum value of the temperature control range Operating power. The immersion cooling system of claim 6, wherein the sensing processing device lowers the pumping device when the operating power of the fan device has been minimized and the vapor temperature is less than the minimum of the temperature control range Operating power. The immersion cooling system of claim 6, wherein the sensing processing device is further configured to detect whether the at least one cooling related parameter of the immersion cooling device is abnormal during the startup of the immersion cooling device to generate a detective And a switch for controlling the immersion cooling device according to the detection result, the at least one cooling related parameter includes a system temperature, a coolant flow rate, a pump rotation speed, a fan rotation speed, a system pressure, and a coolant At least one of the heights of the faces. The immersion cooling system of claim 6, wherein the immersion cooling device further comprises a filter pump, the filter pump is connected to the coolant tank, and the sensing processing device is further used for the immersion cooling device. When the machine is turned on, the filter pump is turned on to filter out the impurities stored in the coolant tank.