TWI750670B - Water tank sensing device for water cooling system - Google Patents

Abstract

The present invention provides a water tank sensing device for water cooling system, comprising a water tank, a floating unit, a water level sensing unit having a magnetic sensor, and a control unit. The water tank comprises a water receiving chamber, a water inlet and a water outlet. The floating unit, disposed in the water receiving chamber, includes a buoy, a rotation section and a connection part for connecting the buoy and the rotation section. The rotation section is pivotedly disposed in the water receiving chamber and has a magnetic zone at an outer part. The magnetic sensor is mounted at a side out of the water tank at a position corresponding to the magnetic zone of the rotation section. The control unit generates a detection signal according to a rotation angle of the magnetic zone detected by the magnetic sensor. Through the present invention, the water level in the water tank is detected in real-time.

Description

Water tank water level sensing device for water cooling system

The present invention relates to a water tank water level sensing device of a water cooling system, in particular to a water tank water level sensing device of a water cooling system that can achieve the effect of sensing the height of the water level in the water tank.

Press, most of the general industrial computers, server computers and high heat dissipation components operate on a 24-hour basis, and the server of the computer will generate high heat during operation. Although there are cooling fans installed in the computer, the heat source of the computer equipment is constantly generated. The air convection effect of the cooling fan is not good, which makes the heat dissipation effect limited. Therefore, in order to effectively reduce the temperature, some manufacturers have developed a water cooling system, which is installed on the heating element of the electronic equipment and can use the water cooling liquid to circulate continuously In and out, it is used to adjust the working temperature of the computer server.

The existing water-cooling system is composed of a water-cooling head, a pump, a water tank filled with working liquid (such as pure water), a water-cooling row and a plurality of water pipes. The rows are connected in series, and the water-cooling head is in contact with the heating element (such as CPU (central processing unit), GPU (graphics processing unit) or other chips or elements) to absorb the heat on the heating element, and the pump The pump drives the working liquid in it to flow through the water-cooled head, the water-cooled row and the water tank in sequence, and finally circulates back to the pump to continue the water circulation to dissipate heat. There will be loss after a period of time. For example, the liquid level (or water level) of the working liquid in the water tank is 5 cm (for example, the working liquid capacity is 200 ml). After a period of use, the working liquid in the water tank The height of the liquid level will gradually decrease to 4 cm (such as the working liquid capacity of 160 ml), 3 cm (such as the working liquid Body volume 120 ml) to 0 cm (for example, the working liquid capacity is 0 ml), so that there is no working liquid in the water cooling system or there is not enough working liquid to provide the heating element for water cooling and heat dissipation, so that the heat of the heating element cannot be quickly dissipated. damage, and the heating element will also decrease with the gradual loss of the working liquid in the water tank, which will affect the operation performance and the phenomenon of insufficient heat dissipation.

Therefore, at present, it is artificially used to check whether the working liquid in the water tank has decreased. For example, after using the water cooling system for a period of time, the user must disassemble the water tank to check whether the working liquid in the water tank has decreased. Only by replenishing the working liquid in it to a standard liquid level scale position in the water tank at any time (for example, the liquid level of the working liquid is 5 cm), can the water cooling system not work normally, which will cause inconvenience and trouble in use.

An object of the present invention is to provide a water tank water level sensing device for a water cooling system that can sense the height of the water level in the water tank.

Another object of the present invention is to provide a water tank water level sensing device for a water cooling system with reduced cost.

Another object of the present invention is to provide a magnetic sensor disposed outside the water tank through a water level sensing unit, and to sense the rotation angle of a magnetic area corresponding to a magnetic area disposed outside a rotating part in the water tank in a non-contact manner , which can achieve the effect of high accuracy of water level sensing, and the water tank water level sensing device of the water cooling system can avoid the problem of water leakage without drilling and pulling wires in the water tank itself.

In order to achieve the above object, the present invention provides a water tank water level sensing device for a water cooling system, comprising a water tank body, a floating unit, a water level sensing unit and a control unit, the water tank body having a water-accommodating chamber and a water inlet and a water outlet, the water chamber is used for storing and supplying a working liquid introduced by the water inlet, the floating unit is arranged in the water chamber, and the floating unit is provided with a water level that floats with the water level in the water chamber The buoy, a rotating part and a connecting part connecting the buoy and the rotating part, the rotating part The water level sensing unit includes a magnetic sensor, and the magnetic sensor is arranged on an outer side of the water tank body corresponding to the magnetic area of the rotating part, and is used for Sensing a rotation angle of the magnetic area floating up and down with the buoy, and generating a sensing signal, the control unit is electrically connected to the magnetic sensor, the control unit processes according to the sensing signal, and generates a water level information , Through the design of the water tank water level sensing device of the present invention, the effect of sensing the water level height in the water tank can be achieved and the cost can be reduced, and the water level sensing accuracy can also be high, and the water tank does not need to drill the cable to effectively avoid water leakage The problem.

1: Water tank water level sensing device

10: Water tank body

101: Water chamber

102: Water inlet

103: Water outlet

11: Floating unit

111: Float

112: Connection part

113: Rotation part

1131: Magnetic Zone

1132: Non-magnetic area

114: Combined rod

12: Water level sensing unit

123: Magnetic sensor

1231: Magnetic induction element

13: Control unit

2: Water cooling system

21: water cooling head

22: Pump

23: Aqueduct

3: Working liquid

4: Electronic equipment

41: Motherboard

FIG. 1 is a schematic diagram of a water level state of a water-holding chamber of a water tank water level sensing device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of another water level state of the water containing chamber of the water tank water level sensing device according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of another water level state of the water containing chamber of the water tank water level sensing device according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of a water cooling system according to an embodiment of the present invention.

The above-mentioned objects of the present invention and their structural and functional characteristics will be described with reference to the preferred embodiments of the accompanying drawings.

The present invention provides a water tank water level sensing device for a water cooling system. Please refer to FIG. 1 , which is a schematic diagram of the water level state of the water-containing chamber of the water tank water level sensing device according to an embodiment of the present invention; and FIG. 2 , an implementation of the present invention. Figure 3 is a schematic diagram of another water level state of the water containing chamber of the water tank water level sensing device according to an embodiment of the present invention; Figure 4 is a schematic diagram of another water level state of the water containing chamber of the water tank water level sensing device according to an embodiment of the present invention. It is a schematic diagram of a water cooling system according to an embodiment of the present invention. As shown in Figures 1 and 2, the water tank of the present invention The position sensing device 1 is applied to a water cooling system 2, through the water cooling system 2, a heating element (such as a CPU (Central Processing Unit) of an electronic device 4 (such as an industrial computer, a server computer or a communication case or other equipment) is connected. ), GPU (graphics processing unit) or other chips or components or heat sources) for water cooling and heat dissipation. The water tank water level sensing device 1 includes a water tank body 10 , a floating unit 11 , a water level sensing unit 12 and a control unit 13 . The water tank body 10 has a water containing chamber 101 , a water inlet 102 and a water outlet 103, the water outlet 103 is used to guide the working liquid 3 in the water containing chamber 101 to flow out, and the water containing chamber 101 is used for storing a working liquid 3 (such as pure water) introduced by the water inlet 102 and supply; the floating unit 11 is set in the water-accommodating chamber 101, the floating unit 11 is provided with a buoy 111 that floats with the water level in the water-accommodating chamber 101, a rotating part 113 and a connecting part 112, the Both ends of the connecting portion 112 (eg, connecting rod) are respectively connected to one end of the buoy 111 and the outer peripheral side of the rotating portion 113 , so that the buoy 111 follows the water level of the working fluid 3 in the water-holding chamber 101 (or The liquid level) changes and floats up or down, and at the same time, the rotating part 113 is driven by the connecting part 112 to rotate in the counterclockwise direction or in the clockwise direction. In a possible embodiment, the buoy 111, the rotating part 113 and the connecting part 112 are integrally formed, for example, by plastic injection molding or 3D printing, or non-integrated by connecting means such as screwing, splicing or gluing connected in one way.

A magnetic area 1131 is disposed outside the rotating portion 113 , and the magnetic area 1131 is located on the entire rotating portion 113 in this embodiment, that is, the rotating portion 113 is a magnet, but not limited thereto. The rotating portion 113 is pivoted in the water-accommodating chamber 101 . In this embodiment, the rotating portion 113 is selected to be pivoted with a combination rod 114 provided in the water-accommodating chamber, which is one end of the combination rod 114 . The other end of the coupling rod 114 is fixed on an inner wall of the water tank body 10 , pivoted with the rotating portion 113 and used as a fulcrum for rotation. In other embodiments, referring to FIG. 3 , the rotating part 113 is made of plastic material or metal material, and a magnetic area 1131 and a non-magnetic area 1132 are disposed outside the rotating part 113 , and the magnetic area 1131 is a magnet or The magnetic portion is disposed on the outer surface of the rotating portion 113 corresponding to the magnetic inductor 123 , and the other outer surfaces of the rotating portion 113 that do not correspond to the magnetic inductor 123 are the non-magnetic regions 1132 , and the non-magnetic regions 1132 are non-magnetic regions 1132 . The outer surface of the rotating part 113 of the magnetic sensor 123 should be a region (position) that is non-magnetic and does not act inductively with the magnetic sensor 123 .

The magnetic sensor 123 is disposed on an outer side of the water tank body 10 corresponding to the magnetic area 1131 , and the magnetic sensor 123 is separated from the working fluid 3 and the rotating part 113 through the water tank body 10 . The magnetic sensor 123 is in this In an embodiment, an angle sensor composed of one or more magnetic induction elements 1231 (for example, a non-contact angle sensor is a Hall angle sensor) is arranged on the outside of the water tank body 10, and the magnetic sensor 123 is connected to The magnetic area 1131 of the rotating portion 113 corresponding to the inner wall of the water-containing space is for non-contact sensing, and the magnetic sensor 123 is used to sense that the magnetic area 1131 floats up and down with the buoy of the floating unit 11 A rotation angle is generated, and a sensing signal is generated, that is, the magnetic sensor 123 senses the change of the magnetic field direction caused by the rotation of the magnetic region 1131 and converts it to generate a sensing signal corresponding to the rotation angle of the magnetic region 1131 .

And the magnetic sensor 123 in the actual implementation is electrically connected (eg wired or wireless) to the control unit 13, and the control unit 13 may be a central processing unit (CPU), a microcontroller (MCU) or a digital A signal processor (DSP), and the control unit 13 is shown as a central processing unit on a motherboard 41 of the electronic device 4 in this embodiment, but not limited to this, the control unit 13 is located in the water tank body 10 outside and not in contact with the working liquid 3 , the control unit 13 obtains the rotation angle of the magnetic region 1131 according to the sensing signal, and then processes the swing angle of the connecting portion 112 , and then calculates the water tank body 10 The water level (or liquid level) inside, and generates a water level information and transmits it to a reminder element (such as LED light, speaker or display; not shown in the figure) to display (or play) the water level information, so that the user can instantly obtain the water level information. Know the current water level information in the water tank, and can immediately (or timely) replenish new working liquid 3 into the water tank The water storage chamber 101 of the body 10 ensures that the working liquid 3 in the water tank body 10 can be maintained at a fixed water level. The water level information is the information of the current water surface height of the working liquid 3 (or the current working liquid 3 capacity) and the position of the buoy 111 in the water storage chamber 101 of the water tank body 10 , such as the highest water surface height in the water storage chamber 101 is 5 cm (as shown in Figure 1), and the relative capacity of the working liquid 3 is 200 ml. At this time, the magnetic sensor 123 senses that the current water level (or liquid level) of the working liquid 3 in the water-containing chamber 101 is 2.5 cm (as shown in Figure 2), and the relative capacity of the working liquid 3 is 100 ml, and so on.

In an alternative embodiment, the control unit 13 can also be an independent control chip and the magnetic sensor 123 disposed on the same circuit board, and transmit the water level information to the reminder element to display (or play) through wired or wireless means. or warning) the water level information.

In addition, referring to Figures 1, 2 and 4, the water inlet 102 and the water outlet 103 of the water tank body 10 are connected to the water cooling system 2 through a plurality of water conduits 23. The water cooling system 2 in this embodiment includes at least A water-cooling head 21, at least one pump 22 and the water tank body 10. The bottom side of the water-cooling head 21 is attached to the heating element to absorb the heat on the heating element. The water outlet 103 guides the outflowing water. The working liquid 3 flows into the pump 22 through a first water conduit 23, the pump 22 is connected through a second water conduit 23 and communicates with an inlet of the water cooling head 21, and the pump 22 is used to drive the The working liquid 3 in the pump 22 flows into the water block 21 through the second water conduit 23, and the water inlet 102 of the water tank body 10 is connected to an outlet of the water block 21 through a third water conduit 23. The outlet of the water-cooled head 21 guides the heat-exchanged working liquid 3 to flow through the water inlet 102 to the water tank body 10 through the third water conduit 23, so as to continuously circulate the water to achieve the effect of water cooling and heat dissipation .

When the water cooling system 2 performs water cooling and heat dissipation on the heating element for a period of time, the original capacity of the working liquid 3 in the water holding chamber 101 of the water tank body 10 is, for example, 200 ml (that is, the height of the water surface is 5 cm; as shown in FIG. 1 ). ) will be gradually lost and reduced, so that the capacity of the working liquid 3 is reduced to, for example, 100 ml (such as the second Fig. ), at the same time, the float 111 will float downward as the working liquid 3 gradually descends. At this time, the magnetic sensor 123 senses that the magnetic region 1131 is driven by the connecting portion 112 to rotate clockwise and the rotation angle is For example, 45 degrees, and a sensing signal corresponding to the rotation angle of the magnetic area 1131 is generated and sent to the control unit 13, so that the control unit 13 can know the rotation angle of the magnetic area 1131 and the connection part 112 according to the sensing signal. The swing angle (such as 45 degrees) is processed to generate the water level information, so as to display (or play) the water level information through the reminder element.

Therefore, through the design of the water tank water level sensing device 1 of the present invention, the effect of real-time sensing of the water level height (water level) in the water tank body 10 can be achieved, and the water level sensing accuracy is high and the cost is reduced. In addition, the user can know the current water level information in real time, which is helpful for timely replenishing the new working liquid 3 into the water tank body 10, so as to effectively achieve good convenience of use and keep the water cooling system 2 in the best state. Water cooling.

In addition, the magnetic sensor 123 is fixed on the outside of the water tank body 10 to sense the angle of the magnetic area 1131 of the rotating part 113 in the water-containing chamber 101 in a non-contact manner, so there is no wire perforated in the water tank body 10 in the present invention ( (or drilling) to the outside of the water tank body 10, so that the water tank body 10 itself does not have any perforations on the walls except the water inlet 102 and the water outlet 103, so that the water tank body 10 has better airtightness and reliability. High, so as to effectively reach without the problem of water leakage. In addition, the water tank body 10 has only mechanical components (eg, the floating unit 11 ), but no electronic components (eg, the magnetic sensor 123 ) in the water tank body 10 , so there is no problem of corrosion of the electronic components.

10: Water tank body

101: Water chamber

102: Water inlet

103: Water outlet

11: Floating unit

111: Float

112: Connection part

113: Rotation part

1131: Magnetic Zone

12: Water level sensing unit

123: Magnetic sensor

1231: Magnetic induction element

Claims (7)

A water tank water level sensing device for a water cooling system, comprising: a water tank body with a water chamber, a water inlet and a water outlet, the water chamber is used for storing and supplying a working liquid introduced by the water inlet ; a floating unit, set in the water-holding chamber, the floating unit is provided with a buoy that floats with the water level in the water-holding chamber, a rotating part and a connecting part connecting the buoy and the rotating part, the rotating part is pivoted in the water-accommodating chamber, and a magnetic area is arranged on the outer side; a water level sensing unit includes a magnetic sensor, the magnetic sensor is arranged on an outer side of the water tank body corresponding to the magnetic area of the rotating part, and is used for Sensing a rotation angle of the magnetic region floating up and down with the buoy, and generating a sensing signal; and a control unit electrically connected to the magnetic sensor, the control unit processes the sensing signal and generates a sensing signal water level information. The water tank water level sensing device for a water cooling system according to claim 1, wherein a non-magnetic area is disposed on the outer side of the rotating part, the magnetic area is located on the outer surface of the rotating part corresponding to the magnetic sensor, and the rotating part does not correspond to the rotating part. The outer surface of the magnetic inductor is a non-magnetic area. The water tank water level sensing device of the water cooling system according to claim 1, wherein the rotating part or the magnetic area is a magnet. The water tank water level sensing device of a water cooling system as claimed in claim 1, wherein a coupling rod is arranged in the water holding chamber, one end of the coupling rod is pivoted with the rotating part, and the other end of the coupling rod is fixed on the An inner wall of the water tank body. The water tank water level sensing device of a water cooling system according to claim 1, wherein the magnetic sensor is an angle sensor. The water tank water level sensing device of a water cooling system according to claim 1, wherein the water inlet and the water outlet are connected and communicated with a water cooling system through a plurality of water conduits. The water tank water level sensing device of the water cooling system according to claim 1, wherein the buoy, the rotating part and the connecting part are integrally formed or non- integrally formed.

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