TWI599304B - Liquid cooling device and liquid cooling heat temperature control method - Google Patents

Description

Liquid cooling heat sink and liquid cooling heat control method

The invention relates to a liquid cooling heat dissipating technology, in particular to a liquid cooling heat dissipating device and a liquid cooling heat dissipating control method applied to a computer device.

The water-cooling heat dissipating device for the computer main body usually includes a heat-dissipating pump and a water-cooling head, and the fan cool-cools the heat-dissipating row. Under the aforementioned architecture, the main noise of the water-cooling heat sink comes from the pump operation, the flow of the coolant, and the rotation of the fan.

Water-cooled heat sinks are typically set to operate in two modes: low power mode and high power mode. The above two modes only detect the temperature of the heat source (such as CPU and drawing chip). When the temperature exceeds the warning value, the fan and the pump run at the same time at full speed; when the temperature is lower than the warning value, the fan and the pump are reduced. power.

However, in a typical water-cooling heat sink, the user cannot adjust the operating power of the fan and the pump, and only in two low-power modes and a high-power mode. In the low power mode, although the fan and the pump reduce the running power, the individual users feel that the noise of the fan and the pump is inconsistent, and the computer case itself may amplify the noise of one of the fan or the pump due to resonance. .

However, if the user directly intervenes in the speed switching of the fan or the pump, the heat dissipation efficiency of the heat dissipation row may be insufficient or the coolant flow rate may be insufficient, and the operation state may be quickly switched to the high power mode.

In the conventional water-cooling heat dissipation system, the user is not allowed to arbitrarily switch the operating power of the fan and the pump, so that the user cannot surely adjust the noise value and the noise frequency.

In order to solve the above problems, at least one embodiment of the present invention provides a liquid cooling heat sink for pumping a coolant to cool a heat source. The liquid cooling heat dissipating device comprises a liquid cooling head, a heat dissipating row, a pump, at least one fan, a liquid inlet temperature sensing device, a liquid outlet temperature sensing device, a heat source temperature sensing device and a control unit.

The liquid cooling head is used to contact the heat source to absorb the heat generated by the heat source, and to pass the coolant for heat exchange. The heat dissipating row has a heat dissipating liquid inlet port and a heat dissipating liquid port; wherein the heat dissipating liquid port and the heat dissipating liquid port are connected to the liquid cooling head to form a circulation line for circulating the cooling liquid, so that the cooling liquid passes through Heat the heat sink and exchange heat. The pump is disposed on the circulation line to pump the coolant to circulate in the circulation line. A fan is fixed on the heat dissipation block for forced air cooling of the heat dissipation row. The liquid inlet temperature sensing device is disposed at the heat dissipating liquid inlet port for detecting the liquid entering temperature of the heat dissipating liquid inlet. The liquid outlet temperature sensing device is disposed at the heat dissipating liquid port, and detects a temperature of the liquid discharged from the heat discharging liquid port, and a temperature difference is formed between the liquid discharging temperature and the liquid entering temperature. The heat source temperature sensing device is disposed at the heat source to detect the temperature of the heat source. The control unit is configured to control the rotation speed of the pump and the fan; the control unit stores a high temperature warning value, a temperature difference upper limit value and a temperature difference lower limit value, and inputs at least one speed setting value.

Wherein, when the temperature of the heat source is not greater than the high temperature warning value, and the temperature difference is between the upper limit of the temperature difference and the lower limit of the temperature difference, the control unit sends a control signal according to the set value of the speed to adjust the speed of the fan or the pump. When the temperature of the heat source is not greater than the high temperature warning value, and the temperature difference is greater than the upper limit of the temperature difference, the control unit forcibly increases the speed of the fan. When the temperature of the heat source is not higher than high When the temperature alarm is displayed and the temperature difference is less than the lower limit of the temperature difference, the control unit forcibly raises the speed of the pump.

At least one embodiment of the present invention provides a liquid cooling heat-dissipating temperature control method for pumping a cooling liquid to cool a heat source, the method comprising the steps of: contacting a heat source with a liquid cold head to absorb heat generated by the heat source, and supplying the coolant Through the heat exchange; a heat dissipation row is connected to the liquid cooling head to form a circulation pipeline for circulating the cooling liquid; wherein the heat dissipation row has a heat discharge liquid inlet port and a heat dissipation liquid discharge port, and the heat dissipation discharge liquid The port and the heat discharge port are connected to the liquid cooling head; detecting the temperature of the heat source, the temperature of the heat sinking into the liquid port, and the temperature of the heat discharging liquid outlet; determining whether the temperature of the heat source is greater than a high temperature warning value, and calculating The temperature difference between the temperature of the liquid and the temperature of the liquid; when the temperature of the heat source is not greater than the warning value of the high temperature, and the temperature difference is between the upper limit of the temperature difference and the lower limit of the temperature difference, the set value is adjusted according to a speed Forced cooling efficiency of the heat dissipation row or increase the flow rate of the pumped coolant; when the temperature of the heat source is not greater than the high temperature warning value, and the temperature difference is greater than the upper limit of the temperature difference, the forced heat dissipation row is strong Cooling efficiency; and when the temperature of the heat source is not greater than the warning temperature value and the temperature difference is less than a lower limit value of the temperature difference, coolant pumping force of increase traffic.

With the above system and method, the user can adjust one of the fan speed or the pump power when the temperature of the heat source permits, and change the noise value and the noise frequency. The system will perform the necessary interventions, and avoid the problem of inefficient heat dissipation or insufficient coolant flow.

100‧‧‧Liquid cooling device

110‧‧‧ liquid cold head

120‧‧‧Heat Discharge

130‧‧‧ pump

140‧‧‧fan

150‧‧‧Inlet temperature sensing device

160‧‧‧liquid outlet temperature sensing device

170‧‧‧heat source temperature sensing device

180‧‧‧Control unit

192‧‧‧bypass

194‧‧‧ 塞盖

195‧‧‧Cylinder

196‧‧‧bypass

197‧‧‧ 塞盖

198‧‧‧Cylinder

190‧‧‧Input interface

200‧‧‧Display interface

900‧‧‧heat source

L‧‧‧Circulation line

T1‧‧‧Inlet temperature

T2‧‧‧ liquid temperature

Temperature of Ts‧‧‧ heat source

Figure 1 is a schematic view of an embodiment of the present invention.

Figure 2 is a block diagram of a circuit of an embodiment of the present invention.

Fig. 3 and Fig. 4 are enlarged views of some of the elements in Fig. 1.

Figure 5 is a flow chart of a method according to an embodiment of the present invention.

Referring to FIG. 1 , FIG. 2 , FIG. 3 , and FIG. 4 , a liquid cooling device 100 for pumping a coolant is disclosed in the embodiment of the present invention. Cooling a heat source 900 is performed. The aforementioned heat source 900 includes, but is not limited to, a high power running integrated circuit chip (eg, a central processing unit or a graphics chip). The liquid cooling device 100 includes a liquid cooling head 110, a heat dissipation row 120, a pump 130, at least one fan 140, a liquid inlet temperature sensing device 150, a liquid outlet temperature sensing device 160, a heat source temperature sensing device 170, and A control unit 180.

As shown in Fig. 1, the liquid cooling head 110 is usually a metal block or other block having a heat transfer coefficient to rapidly conduct heat. The liquid cooling head 110 is used to contact the heat source 900 to absorb the heat generated by the heat source 900. The liquid cooling head 110 has at least one heat exchange zone for heat exchange by passage of the coolant. The heat exchange zone may be a passage through the liquid cooling head 110 or a cavity formed by the cover or the pump 130 on the surface of the liquid cooling head 110.

As shown in FIG. 1, the heat dissipation row 120 has fins (not shown) arranged in parallel, a pipe passing through the fins (not shown), a heat dissipating liquid inlet port, and a heat dissipating liquid port. The heat dissipation row 120 is used for the coolant to enter the heat dissipation row 120, and passes through the pipeline and then exits the heat dissipation row 120 by the heat dissipation liquid discharge port. The coolant can be heat exchanged in the pipeline to transfer heat to the fins for air cooling. The heat dissipating liquid inlet port and the heat dissipating liquid discharge port are connected to the heat exchange zone of the liquid cooling head 110 to form a circulation line L for circulating the cooling liquid.

As shown in "Fig. 1" and "Fig. 2", the pump 130 is disposed in the circulation line L to circulate and flow the coolant in the circulation line L. The fan 140 is fixed on the heat dissipation row 120 for blowing or inhaling the heat dissipation row 120 to perform forced air cooling on the heat dissipation row 120. The fan 140 is shown as one, but in practice, the fan 140 may be two or more.

As shown in "Fig. 1" and "Fig. 2", the liquid inlet temperature sensing device 150 is disposed at the heat discharge liquid inlet for detecting the liquid inlet temperature T1 of the heat discharge liquid inlet; the liquid outlet temperature sensing device 160 The temperature is set to the heat discharge liquid outlet, and the temperature T2 of the heat discharge liquid outlet is detected, and a temperature difference dT is formed between the liquid discharge temperature T2 and the liquid inlet temperature T1. The heat source temperature sensing device 170 is disposed at the heat source 900 for detecting the temperature Ts of the heat source of the heat source 900.

As shown in "Fig. 3 and Fig. 4", the installation position of the inlet temperature sensing device 150 is preferably disposed at the center of the water flow to ensure that the temperature picked up is close to the average temperature of the coolant at that point. The manner in which the liquid inlet temperature sensing device 150 is located at the center of the water flow is connected to the circulation line L through a bypass pipe 192 and close to the heat discharge liquid inlet port, and the bypass pipe 192 is sealed by the plug cover 194. A cylinder 195 is fixed to the plug cover 194, and the top end of the plug cover 194 extends to the center of the circulation line L, and the liquid inlet temperature sensing device 150 is fixed to the top end of the cylinder 195. Similarly, another bypass pipe 196 is connected to the circulation line L and is close to the heat discharge discharge port, and a plug cover 197 seals the bypass pipe 196. A cylinder 198 is secured to the plug cap 197, and the top section of the plug cap 197 extends to the center of the circulation line, and the outlet port temperature sensing device 160 is secured to the top end of the cylinder 198.

Referring to FIG. 1 , the control unit 180 is configured to control the rotation speed of the pump 130 and the rotation speed of the fan 140 to control the flow rate of the pumped coolant and the cooling efficiency of the heat dissipation row 120 . The control unit 180 stores a high temperature warning value, a temperature difference upper limit value and a temperature difference lower limit value, and inputs at least one speed setting value. The control unit 180 is connected to the pump 130, the fan 140, the liquid inlet temperature sensing device 150, the liquid outlet temperature sensing device 160, and the heat source temperature sensing device 170 for obtaining the liquid inlet temperature T1 and the heat dissipation liquid outlet of the heat discharge liquid inlet. The discharge temperature T2 and the temperature Ts of the heat source are used to control the rotation speed of the pump 130 and the rotation speed of the fan 140.

As shown in "1" and "2", the liquid cooling device 100 further includes a Input interface 190 and a display interface 200. The input interface 190 is for the user to operate to input the rotational speed setpoint. The display interface 200 is used to display the temperature of the water cooling head and the flow rate of the cooling liquid.

The control unit 180 includes a forced operation mode and a user setting mode. In the forced working mode, the control unit 180 sends out a control signal to force the speed of the fan 140 or the pump 130 to be raised according to a preset value, and ignores the speed setting value provided by the user. In the user setting mode, the control unit 180 issues a control signal according to the set speed value set by the user, so that the user controls the speed of the fan 140 and the pump 130 to adjust the noise value.

Please refer to FIG. 1 , FIG. 2 and FIG. 5 , which illustrate a liquid cooling heat control method according to an embodiment of the present invention.

In step 110 and step 120, the liquid inlet temperature sensing device 150, the liquid outlet temperature sensing device 160, and the heat source temperature sensing device 170 respectively detect the liquid inlet temperature T1, the liquid outlet temperature T2, and the temperature Ts of the heat source, and the foregoing The value is transmitted to the control unit 180.

Next, the control unit 180 compares the temperature Ts of the heat source with the high temperature warning value Tth to determine whether the temperature Ts of the heat source is greater than the high temperature warning value, as shown in step 130. For example, when the heat source 900 is a drawing chip, the safe operating temperature of the drawing wafer is less than 85 degrees Celsius, the high temperature warning value Tth can be set to 80 degrees Celsius; if the heat source 900 is another wafer, the safe working temperature for the wafer is Set the high temperature warning value.

If the temperature Ts of the heat source is greater than the high temperature warning value Tth, the control unit performs the forced control mode, and simultaneously increases the rotational speed of the fan and the rotational speed of the pump to increase the forced cooling efficiency of the heat dissipation row 120 and increase the flow rate of the pumped coolant. Thereby, the temperature Ts of the heat source is quickly lowered to below the high temperature warning value Tth, as shown in step 140.

If the temperature Ts of the heat source is not greater than the high temperature warning value Tth, the control unit 180 The temperature difference dT between the liquid temperature T2 and the liquid inlet temperature T1 is further calculated as shown in step 150.

The control unit 180 sets a temperature difference upper limit value B and a temperature difference lower limit value A (B>A).

When the temperature difference dT is between the temperature difference upper limit value B and the temperature difference lower limit value A, it indicates that the operation state of the liquid cooling heat sink 100 is normal, and the user can freely control the rotation speed of the fan 140 and the rotation speed of the pump 130. To adjust the noise. At this time, the control unit 180 switches to the user setting mode, and the control unit 180 issues a control signal according to the set speed value set by the user, adjusts the forced cooling efficiency of the heat sink 120 or increases the flow rate of pumping the coolant. For example, the user can adjust the rotation speed of the fan 140 and the pump 130 to adjust the noise value, as shown in step 160 and step 162.

When the temperature difference dT is greater than the temperature difference upper limit value B, the heat dissipation performance of the heat dissipation row is not good. At this time, the control unit 180 switches to the forced operation mode to forcibly increase the cooling efficiency of the heat dissipation row 120, that is, the forced lifting fan 140. The speed is as shown in step 170 and step 172. In addition, the control unit 180 can further control the fan to repeatedly change the wind direction, start the dust removal function of the heat dissipation row 120 in the reciprocating wind direction, and reduce the dust on the heat dissipation row, as shown in step 174.

When the temperature difference dT is less than the temperature difference lower limit value A, the flow rate of water passing through the water cooling head is insufficient. At this time, the control unit 180 is also switched to the forced operation mode to forcibly increase the flow rate of the pumped coolant, that is, the pump is lifted. The rotational speed of 130 is as shown in step 180 and step 182.

With the above system and method, the user can adjust one of the fan speed or the pump power when the temperature of the heat source permits, and change the noise value and the noise frequency. The system will perform the necessary interventions, and avoid the problem of inefficient heat dissipation or insufficient coolant flow.

Claims (14)

A liquid cooling heat dissipating device for pumping a cooling liquid to cool a heat source, the liquid cooling heat dissipating device comprising: a liquid cooling head for contacting the heat source to absorb heat generated by the heat source, and supplying the cooling liquid Passing through the heat exchange; a heat dissipating row having a heat dissipating liquid inlet port and a heat dissipating liquid port; wherein the heat dissipating liquid port and the heat dissipating liquid port are connected to the liquid cooling head to form the cooling liquid Circulating flow circulation line, passing the coolant through the heat dissipation row and performing heat exchange; a pump is disposed on the circulation pipeline to pump the coolant to circulate in the circulation pipeline; at least one fan, Fixed on the heat dissipation row for forced air cooling of the heat dissipation row; a liquid inlet temperature sensing device is disposed at the heat dissipation liquid inlet port for detecting the liquid inlet temperature of the heat dissipation liquid inlet; a liquid port temperature sensing device is disposed at the heat dissipating liquid outlet port for detecting a liquid discharge temperature of the heat dissipating liquid discharge port, and a temperature difference is formed between the liquid discharge temperature and the liquid inlet temperature; a heat source temperature sensing device is disposed For the heat source, for detecting a temperature of the heat source; a control unit for controlling the rotation speed of the pump and the rotation speed of the fan; the control unit storing a high temperature warning value, a temperature difference upper limit value and a temperature difference lower limit value, and inputting at least one a speed setting value; wherein, when the temperature of the heat source is not greater than the high temperature warning value, and the temperature difference is between the upper limit value of the temperature difference and the lower limit value of the temperature difference, the control unit issues a control according to the speed setting value a signal to adjust the speed of the fan or the pump; When the temperature of the heat source is not greater than the high temperature warning value, and the temperature difference is greater than the upper limit of the temperature difference, the heat dissipation performance of the heat dissipation row is relatively poor, and the control unit forcibly raises the rotation speed of the fan; when the temperature of the heat source is When the temperature difference is less than the temperature difference lower limit, the water flow rate through the liquid cooling head is relatively insufficient, and the control unit forcibly raises the rotation speed of the pump. The liquid cooling heat dissipating device of claim 1, wherein the control unit controls the fan to repeatedly change the wind direction after the rotation speed of the fan is raised. The liquid cooling heat dissipating device according to claim 1, wherein the liquid cooling head has at least one heat exchange area for the coolant to pass, and the heat dissipating liquid inlet port and the heat dissipating liquid discharge port are connected to the liquid cooling head. Heat exchange area. The liquid cooling device of claim 3, wherein the heat exchange zone is a passage through the liquid cooling head. The liquid cooling device of claim 3, wherein the heat exchange zone is a chamber formed by covering a surface of the liquid cooling head with a cover. The liquid cooling device of claim 1, further comprising: a bypass pipe connected to the circulation pipe and close to the heat dissipation liquid inlet; a plug cover to seal the bypass pipe; and a column body, The plug cover is fixed, and a top end of the cylinder extends to the center of the circulation line, and the liquid inlet temperature sensing device is fixed to the top end of the cylinder. The liquid cooling device of claim 1, further comprising: a bypass pipe connected to the circulation pipe and adjacent to the heat dissipation liquid outlet; a plug cap sealing the bypass pipe; and a cylinder fixed to the plug cover, and a top end of the column body extends to a center of the circulation pipe, and the liquid outlet temperature sensing device is fixed to the column body The top. The liquid cooling device of claim 1, wherein when the temperature of the heat source is greater than the high temperature warning value, the control unit simultaneously forcibly increases the rotation speed of the fan and the rotation speed of the pump. The liquid cooling device of claim 1, further comprising an input interface for inputting the speed setting value. The liquid cooling heat dissipating device according to claim 9 further comprises a display interface for displaying the temperature of the liquid cooling head and the coolant flow rate. A liquid cooling heat-dissipating temperature control method for pumping a cooling liquid to cool a heat source, the method comprising: contacting a heat source with a liquid cold head to absorb heat generated by the heat source, and allowing the coolant to pass through Heat exchange; is connected to the liquid cooling head by a heat dissipation row to form a circulation line for circulating the cooling liquid; wherein the heat dissipation row has a heat discharge liquid inlet port and a heat dissipation liquid discharge port, and the heat dissipation liquid is discharged The mouth and the heat dissipation liquid outlet are connected to the liquid cooling head; detecting the temperature of the heat source, the liquid entering temperature of the heat discharging liquid inlet, and the liquid discharging temperature of the heat discharging liquid outlet; determining whether the temperature of the heat source is greater than a high temperature a warning value, and calculating a temperature difference between the liquid outlet temperature and the liquid inlet temperature; when the temperature of the heat source is not greater than the high temperature warning value, and the temperature difference is between the upper limit of the temperature difference and the lower limit value of the temperature difference During the interval, the cooling of the heat sink is adjusted according to a speed setting value. However, the efficiency or the flow rate of the pump is increased; when the temperature of the heat source is not greater than the high temperature warning value, and the temperature difference is greater than the upper limit of the temperature difference, the heat dissipation performance of the heat dissipation row is relatively poor, and the heat dissipation is forced to be increased. The forced cooling efficiency of the heat dissipation row; and when the temperature of the heat source is not greater than the high temperature warning value, and the temperature difference is less than a lower temperature limit value, the water flow through the liquid cooling head is relatively insufficient, and the lifting is forced to pump the cooling The flow of liquid. The liquid cooling heat control method according to claim 11, wherein when the temperature of the heat source is greater than the high temperature warning value, the forced cooling efficiency of the heat dissipation row is increased or the flow rate of the cooling liquid is increased. The liquid cooling heat-dissipating temperature control method according to claim 11, wherein the step of increasing the forced cooling efficiency of the heat dissipation row is to increase the rotation speed of a fan for blowing or inhaling the heat dissipation row. The liquid cooling heat control method according to claim 13, wherein after the speed of the fan is raised, the method further includes a step of controlling the fan to repeatedly change the wind direction.