TWI546516B - Micro-liquid cooler - Google Patents

Description

Micro liquid cooler

This invention relates to a cooler, and more particularly to a micro-liquid cooler.

A conventional cooling method for key parts (such as CPU...) related to the computer information industry is to use a small-volume fan for forced convection. However, in recent years, with the improvement of computer processing performance, the heating power of related key parts (ie, the load) has also increased rapidly. Moreover, the heating power of the key parts manufacturing process is also moving toward a larger trend. For example, the heating power of a single electronic chip package can reach about 150 W or more. The cooling effect of the fan is not good, and this method cannot automatically adjust the cooling capacity according to the heating power of the key parts of the computer.

Another conventional cooling method is to use an electronic thermoelectric wafer, the principle of which is to use the Peltier effect, which is used when a DC power source passes through a plurality of pairs of n-type and p-type semiconductor materials in the electronic thermoelectric wafer. The ceramic surfaces on both sides of the wafer (cold surface, hot surface, respectively) will create a temperature difference, and this temperature difference can be used to remove the heat of key parts of the computer, although this method can adjust the cooling capacity by adjusting the size of the DC power supply, however, The electronic thermoelectric chip still has the following defects:

1. The coefficient of performance (COP) of the currently commercially available electronic thermoelectric wafers is still not high, and the COP may even be small. At 1.0, the cooling efficiency is not good, so it is relatively energy intensive.

Second, although the cooling capacity can be adjusted by adjusting the size of the DC power supply, the current commercial products cannot achieve the precise fluid temperature thermal compensation control effect (the error between the actual value and the set value is above ±1.0 °C).

3. In order to maintain the cooling effect of the electronic thermoelectric chip, it is necessary to place a heat sink (for example, an aluminum heat sink) and a fan on the hot surface, thereby removing the heat of the hot surface, but even if it is already A thermal grease is applied between the hot surface and the heat sink, and a relative thermal resistance between the hot surface and the heat sink is still present, thereby causing a decrease in the cooling effect of the electronic thermoelectric wafer, and even a temperature due to the hot surface. Too high and burned.

For cooling applications in the medical field, in order to alleviate the discomfort of the body part (ie, load) of the patient, a cold and hot bag containing a liquid (for example, water) and having a small volume is generally used. Before the hot pack, the hot and cold pack must be placed in a heat source (such as hot water) to increase the temperature. Before the cold pack, the hot pack must be placed in a cold source (such as a refrigerator) to lower the temperature.

However, since the hot and cold pack is affected by factors such as room temperature, initial liquid temperature, and patient temperature, the hot and cold pack can provide heat and cold for a long time (about tens of minutes), that is, at intervals. It is necessary to perform the operation of storing heat or storing cold again, which is time consuming and inconvenient.

Therefore, the object of the present invention is to provide a liquid which can accurately supply a liquid of a required temperature for a long time, and which is small in size and convenient to carry. Liquid cooler.

Therefore, the micro liquid cooler of the present invention is suitable for stably providing a temperature-thermally compensated liquid to a load to satisfy a required temperature. The micro liquid cooler includes a housing unit, a refrigeration system, a liquid circulation system, and an automatic control system.

The housing unit includes a plurality of heat dissipating air inlets, a plurality of cooling air outlets, a liquid inlet, and a liquid outlet.

The refrigeration system is disposed in the housing unit and includes a miniature DC brushless compressor, a condenser adjacent to the cooling air inlets and the cooling air outlets, a dryer, an expander, an evaporator, A fan and several refrigerant tubes.

The fan introduces ambient air from the heat-dissipating air inlets and through the condenser, and then discharges back to the environment via the heat-dissipating air outlet to form a circulation of the heat-dissipating air.

The refrigerant tubes are connected in series to the micro DC brushless compressor, the condenser, the dryer, the expander, and the evaporator.

The liquid circulation system is disposed in the housing unit, and includes a pump, a heater, a liquid container for the evaporator, the heater and the liquid, and a pump, the liquid container A liquid tube connected to the load via the liquid inlet and the liquid outlet.

The automatic control system is disposed on a front surface of the housing unit, and includes a controller, a driver electrically connecting the controller and the micro DC brushless compressor, and an actuator electrically connecting the controller and the heater And a temperature sensor connected to the controller through a temperature signal line.

The effect of the invention is that, after the logic operation of the controller, the output of the driver and the actuator are simultaneously adjusted, so that the micro DC brushless compressor, the evaporator and the heater can be provided in the liquid container The suitable heat exchange effect of the liquid achieves the effect of precise heat compensation for controlling the temperature of the liquid, and the micro liquid cooler is small in size, does not occupy space when used, and has the advantages of being convenient to carry.

1‧‧‧Sheet unit

11‧‧‧Thermal air inlet

12‧‧‧heating air outlet

13‧‧‧Liquid inlet

14‧‧‧Liquid exports

15‧‧‧Controller mounting port

16‧‧‧Power input port

161‧‧‧ terminals

17‧‧‧Liquid view window

2‧‧‧ refrigeration system

21‧‧‧Micro DC Brushless Compressor

22‧‧‧Condenser

23‧‧‧ Dryer

24‧‧‧Expander

25‧‧‧Evaporator

26‧‧‧Fan

27‧‧‧ refrigerant tube

3‧‧‧Liquid circulation system

31‧‧‧ pump

32‧‧‧heater

33‧‧‧Liquid container

331‧‧‧Adding port

332‧‧‧Draining port

333‧‧‧Liquid window

34‧‧‧Liquid tube

4‧‧‧Automatic Control System

41‧‧‧ Controller

411‧‧‧ comparator

412‧‧‧Operator

413‧‧‧Temperature setting button

414‧‧‧Power button

415‧‧‧ display panel

416‧‧‧Up and down button

417‧‧‧Setting key

42‧‧‧ drive

43‧‧‧Actuator

44‧‧‧temperature sensor

45‧‧‧Temperature signal line

9‧‧‧ load

Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: FIG. 1 is a schematic diagram illustrating an embodiment of a micro-liquid cooler of the present invention; FIG. 2 is a side view illustrating A housing unit of the embodiment; FIG. 3 is a rear view of the embodiment; FIG. 4 is a perspective view of the embodiment, in which parts of the housing unit are omitted, and one of the embodiments is The dryer, an expander, an evaporator and a plurality of refrigerant tubes are represented by imaginary lines; FIG. 5 is a block flow diagram illustrating signals between an automatic control system, a freezing system and a liquid circulation system of the embodiment. Transmission mode; and Fig. 6 is a front view showing the appearance of a controller of this embodiment.

Referring to FIG. 1 to FIG. 3, the micro liquid cooler of the present invention is suitable for a load 9 (for example, a cold heat pack used in the medical field, a computer CPU) Parts, etc.) stably supply liquid that has been subjected to temperature thermal compensation to meet the required temperature. An embodiment of the micro liquid cooler includes a housing unit 1, a refrigeration system 2, a liquid circulation system 3, and an automatic control system 4.

The housing unit 1 includes a plurality of heat dissipating air inlets 11, a plurality of heat dissipating air outlets 12, a liquid inlet 13, a liquid outlet 14, a controller mounting port 15, a power input port 16, and a liquid level viewing window 17.

The power input port 16 has a terminal 161 electrically connected to the refrigeration system 2, the liquid circulation system 3, and the automatic control system 4.

Referring to FIG. 1 and FIG. 4, the refrigeration system 2 is disposed in the housing unit 1 and includes a miniature DC brushless compressor 21 (approximately 300 cm ^{3 in} volume), a heat dissipating air inlet 11 adjacent to the cooling air, and the cooling air. The condenser 22 of the outlet 12, a dryer 23, an expander 24, an evaporator 25, a fan 26 and a plurality of refrigerant tubes 27.

The refrigerant tubes 27 are connected in series to the micro DC brushless compressor 21, the condenser 22, the dryer 23, the expander 24, and the evaporator 25.

The operating principle of the refrigeration system 2 is as follows: after the low-pressure gaseous refrigerant in the refrigerant tubes 27 passes through the micro-DC brushless compressor 21, the micro-DC brushless compressor 21 increases the gaseous refrigerant in the refrigerant tubes 27 (Fig. The pressure of the high pressure gaseous refrigerant is driven to the condenser 22, and the condenser 22 introduces ambient air from the heat dissipation air inlets 11 through the fan 26, and the ambient air will pass through the condenser 22 to Dissipating the high-temperature heat of the high-pressure gaseous refrigerant in the condenser 22 to cause the high-pressure gaseous refrigerant to condense and condense in the condenser 22 to a high temperature The liquid refrigerant is pressurized and the ambient air is discharged back to the environment via the cooling air outlets 12.

Then, the high-pressure liquid refrigerant enters the dryer 23, and the dryer 23 absorbs the water vapor in the high-pressure liquid refrigerant, and then continues to flow to the expander 24, and the expander 24 reduces the pressure of the high-pressure liquid refrigerant by using the friction principle. Then, the low-pressure liquid refrigerant exchanges heat in the evaporator 25 to absorb heat from the heat exchange in the load 9, and evaporates into a low-pressure gaseous refrigerant. Finally, the low pressure gaseous refrigerant is again drawn into the micro DC brushless compressor 21, and the above cycle is repeated to form the refrigeration system 2.

In the present embodiment, the expander 24 is a capillary made of copper.

The liquid circulation system 3 is disposed in the housing unit 1 and includes a pump 31, a heater 32, a liquid container 33 for the evaporator 25, the heater 32 and the liquid, and a connection with the liquid The pump 31, the liquid container 33 is connected to the liquid tube 34 of the load 9 via the liquid inlet 13 and the liquid outlet 14. The liquid container 33 has a liquid supply port 331, a liquid discharge port 332, and a liquid level window 333.

The operation principle of the liquid circulation system 3 is as follows: the pump 31 drives the liquid flowing out through the load 9 so that the liquid can enter the liquid container 33 from the liquid inlet 13 via the liquid tube 34 for thermal compensation work. That is, the liquid in the liquid container 33 is exchanged with the heater 32 in the liquid container 33 to increase the heat absorption, or the heat is exchanged with the evaporator 25 to release the heat. The interactive thermal compensation temperature control meets the different heat generation of the load 9. Finally, the liquid will flow from the liquid container 33 through the liquid outlet 14 back to the load 9 due to the pump 31, and The operation of performing heat exchange within the load 9. The liquid flows cyclically in accordance with the above process to form the liquid circulation system 3.

Referring to FIG. 1 , FIG. 4 and FIG. 5 , the automatic control system 4 is disposed on the housing unit 1 and includes a controller 41 mounted on the controller mounting port 15 , electrically connecting the controller 41 and the micro DC. a driver 42 of the brushless compressor 21, an actuator 43 electrically connected to the controller 41 and the heater 32, and a controller 41 connected to the evaporator through a temperature signal line 45, and the heater 32 is placed in the same liquid container 33 as the temperature sensor 44.

Referring to FIG. 5 and FIG. 6, the controller 41 has a comparator 411, an operator 412 electrically connected to the comparator 411, the driver 42 and the actuator 43, an electrical connection of the comparator 411, and a setting requirement. A temperature setting button 413 for the liquid temperature, a power button 414, and a display panel 415 for displaying the temperature of the liquid.

The temperature setting key 413 has a vertical key portion 416 and a setting key portion 417.

In this embodiment, the actuator 43 is a solid state power supply, and may also be a voltage controlled rectifier.

Referring to FIG. 1 , FIG. 2 and FIG. 6 , in actual operation, the user first adds a liquid (for example, water) from the liquid filling port 331 into the liquid container 33 , and observes the liquid surface window 333 from the liquid surface viewing window 17 . Liquid level, about join Eight minutes of full liquid can be used, and then the power supply line (not shown) for supplying the mains is connected to the terminal 161 of the power input port 16, and the power button 414 of the controller 41 is pressed to provide power. The refrigeration system 2, the liquid circulation system 3, and the automatic control system 4 are supplied.

Next, the user inputs a required liquid temperature (hereinafter referred to as a set temperature value) through the up and down key portion 416 of the controller 41 and the setting key portion 417, and the display panel 415 can display the set temperature value, and the display panel 415 can display the set temperature value. The set temperature value is simultaneously transmitted to the comparator 411 (see Fig. 5).

Referring to FIG. 1 and FIG. 5, after sensing the actual liquid temperature (hereinafter referred to as the actual temperature value) in the liquid tube 34 via the temperature sensor 44, the temperature signal line 45 can be transmitted to the controller 41 through the temperature signal line 45, and then The display panel 415 displays the actual temperature value and the actual temperature value is also transmitted to the comparator 411.

The set temperature value input by the user and the actual temperature value sensed by the temperature sensor 44 in the liquid tube 34 are processed by the comparator 411, if the set temperature value is different from the actual temperature value. The comparator 411 will transmit the difference to the operator 412 for logical operation. It is worth mentioning that the arithmetic unit 412 performs logical operations according to the PID control law.

When the difference after the comparison by the comparator 411 is that the actual temperature value is greater than the set temperature value, the operator 412 provides the difference to the driver 42 via the signal after the logic operation, and then via the driver 42. Driving the micro DC brushless compressor 21 so that the micro DC brushless compressor 21 is repeatedly adapted according to the calculation result of the arithmetic unit 412 The speed is operated to adjust the heat exchange effect of the evaporator 25 and the liquid in the liquid container 33, so that the evaporator 25 can cope with the heat generation condition of the load 9 and the liquid container 33 can be handled. The liquid is subjected to temperature control of heat exchange endothermic cooling, so that the actual temperature value can be gently reduced and accurately tracked, and the actual temperature value is stably provided for a long time and the set temperature value is between ±0.1 and 0.2 °C. The varying liquid gives the load 9.

When the difference after the comparator 411 is processed, the actual temperature value is less than the set temperature value, the operator 412 provides the difference to the driver 42 and the actuation via the signal after the logic operation. The micro-DC brushless compressor 21 is further driven by the driver 42 to reduce the heat exchange between the evaporator 25 and the liquid in the liquid container 33. The effect is to maintain a certain flow rate of the refrigerant in the refrigerant tubes 27 to meet the oil return requirement of the micro DC brushless compressor 21, and the actual temperature value of the liquid does not have a significant amplitude change, and the operation The heater 412 also drives the heater 32 via the actuator 43 to perform precise heat exchange cooling and heat exchange temperature increase thermal compensation control for the liquid in the liquid container 33, so that the actual temperature value can be gently increased. The high value is used to track the set temperature value, and the liquid which is changed between the actual temperature value and the set temperature value between ±0.1 and 0.2 ° C is stably supplied for a long time.

In addition, since the controller 41 can precisely adjust the cooling heat exchange amount or the temperature increase heat exchange amount according to the actual temperature value of the load 9, it is not necessary to add additional heat storage or cold storage action as in the conventional method. The motor efficiency of the micro-DC brushless compressor 21 is about 15% higher than that of the conventional AC compressor motor, and the refrigeration system 2 has a coefficient of performance (COP) of more than 2.5, so the contribution to energy saving and carbon reduction is remarkable. .

Through the above description, the advantages of the present invention can be summarized as follows:

1. The present invention can adjust the output of the driver 42 and the actuator 43 simultaneously by the logic operation of the controller 41 according to the demand of the load 9, so that the micro DC brushless compressor 21 and the evaporator 25 and the heater 32 can provide a suitable heat exchange result of the liquid in the liquid container 33, thereby achieving an accurate liquid temperature thermal compensation control effect (the actual temperature value of the liquid and the set temperature value is between ±0.1~) Between 0.2 ° C), it is effective to improve the conventional lack of cooling effect of the fan, and at the same time improve the lack of the temperature control effect of the electronic thermoelectric wafer (error of ±1.0 ° C or more).

2. The refrigeration system 2 of the micro DC brushless compressor 21 has a coefficient of performance (COP) of more than 2.5, which is superior to the conventional electronic thermoelectric wafer (COP is less than 1.0), so that the cooling efficiency is good and the energy contribution is positively contributed. .

Third, the use does not require a complicated process such as reverse heat storage or cold storage, and can be continuously used, and the liquid having the required temperature is supplied stably and accurately for a long time for the load 9 to be used.

4. The micro-DC brushless compressor 21 has a small volume (about 300 cm ³ ), so that the volume of the invention is small (width 158 mm ‧ deep 320 mm ‧ high 306 mm), so that it does not occupy space when used, and has the advantages of convenient carrying .

5. The actuator 43 can drive the heater 32 when the heat generation amount of the load 9 becomes small (even in the case of no heat generation), thereby performing precise heat exchange heating on the liquid in the liquid container 33. The temperature control allows the actual temperature value to be accurately increased to track the set temperature value, thereby stably providing the liquid with the actual temperature value and the set temperature value between ±0.1 and 0.2 °C for a long time to reach the load 9 The effect of precise temperature thermal compensation control.

In summary, after the logic operation of the controller 41, the output of the driver 42 and the actuator 43 can be precisely adjusted synchronously, so that the micro DC brushless compressor 21, the evaporator 25 and The heater 32 can provide the most suitable heat exchange result of the liquid in the liquid container 33, and achieve the effect of precise temperature thermal compensation control, and the invention has the advantages of small volume, no space occupation during use, and convenient carrying. It is indeed possible to achieve the object of the invention.

However, the above is only the embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and the patent specification of the present invention are still It is within the scope of the patent of the present invention.

1‧‧‧Sheet unit

11‧‧‧Thermal air inlet

12‧‧‧heating air outlet

13‧‧‧Liquid inlet

14‧‧‧Liquid exports

15‧‧‧Controller mounting port

16‧‧‧Power input port

17‧‧‧Liquid view window

2‧‧‧ refrigeration system

21‧‧‧Micro DC Brushless Compressor

22‧‧‧Condenser

23‧‧‧ Dryer

24‧‧‧Expander

25‧‧‧Evaporator

26‧‧‧Fan

27‧‧‧ refrigerant tube

3‧‧‧Liquid circulation system

31‧‧‧ pump

32‧‧‧heater

33‧‧‧Liquid container

331‧‧‧Adding port

332‧‧‧Draining port

34‧‧‧Liquid tube

4‧‧‧Automatic Control System

41‧‧‧ Controller

42‧‧‧ drive

43‧‧‧Actuator

44‧‧‧temperature sensor

45‧‧‧Temperature signal line

9‧‧‧ load

Claims (7)

A micro liquid cooler for providing a temperature-heat-compensated liquid to a load, the micro-liquid cooler comprising: a housing unit including a plurality of heat-dissipating air inlets, a plurality of heat-dissipating air outlets, a liquid inlet, and a liquid An outlet system is disposed in the housing unit and includes a miniature DC brushless compressor, a condenser adjacent to the cooling air inlet and the cooling air outlet, a dryer, an expander, and a An evaporator, a fan and a plurality of refrigerant tubes, the fan introducing ambient air from the heat-dissipating air inlets and passing through the condenser, and then discharging the heat-dissipating air outlets to the environment, wherein the refrigerant tubes are connected in series with the micro-tubes a DC brushless compressor, the condenser, the dryer, the expander and the evaporator, the expander is a capillary made of copper material; a liquid circulation system is disposed in the housing unit, and The utility model comprises a pump, a heater, a liquid container for the evaporator, the heater and the liquid, and a pump, the liquid container and the liquid inlet The liquid outlet is connected to the liquid tube of the load; and an automatic control system is disposed on the housing unit, and includes a controller, a driver electrically connecting the controller and the micro DC brushless compressor, and an electrical connection The controller and the actuator of the heater, and a temperature sensor connected to the controller through a temperature signal line. A micro-liquid cooler according to claim 1, wherein the controller has a comparator and an operator electrically connected to the comparator, the driver and the actuator. The micro liquid cooler according to claim 2, wherein the controller further has a temperature setting button for setting a required liquid temperature, a power button, and a display panel for displaying a liquid temperature, the temperature setting button having a up and down button And a setting button. The micro liquid cooler according to claim 1, wherein the housing unit further comprises a controller mounting port for the controller, a power input port having a terminal, and a liquid level viewing window, the terminal and the The refrigeration system, the liquid circulation system, and the automatic control system are electrically connected. The micro liquid cooler according to claim 1, wherein the liquid container has a liquid supply port, a liquid discharge port, and a liquid level window. The micro liquid cooler of claim 1, wherein the actuator is a solid state electric power. A micro-liquid cooler according to claim 1, wherein the actuator is a controlled rectifier.