WO2023061321A1

WO2023061321A1 - Liquid leakage detection apparatus and power supply

Info

Publication number: WO2023061321A1
Application number: PCT/CN2022/124343
Authority: WO
Inventors: 赵东升; 强永攀
Original assignee: 华为技术有限公司
Priority date: 2021-10-15
Filing date: 2022-10-10
Publication date: 2023-04-20
Also published as: CN113945332A

Abstract

A liquid leakage detection apparatus (4) and a power supply, relating to the technical field of detection devices. The liquid leakage detection apparatus (4) comprises a detection box (40), a detection capacitor (41), and a detection unit (42); the detection box (40) is provided with an accommodating cavity; an opening is formed at one end of the accommodating cavity; the opening is used for corresponding to a liquid inlet (20) and a liquid outlet (21) of a power supply cold liquid; the detection capacitor (41) is provided in the accommodating cavity; the detection unit (42) is connected to the detection capacitor (41); and the detection unit (42) is configured to detect the capacitance information of the detection capacitor (41), and according to the capacitance information, determine whether the detection capacitor (41) is anomalous. The liquid leakage detection apparatus (4) is provided at the liquid inlet (20) and the liquid outlet (21) of the power supply cold liquid, and can detect, in real time, whether liquid leakage occurs at the liquid inlet (20) and the liquid outlet (21) of the power supply cold liquid, thereby preventing the cold liquid from causing serious harm to a device and a power supply.

Description

Leakage detection device and power supply

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 202111202703.9 and the application title "Liquid Leakage Detection Device and Power Supply" filed with the China Patent Office on October 15, 2021, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of detection equipment, in particular to a liquid leakage detection device and a power supply.

Background technique

As the operating frequency of the central processing unit (CPU for short) and the graphics processing unit (GPU for short) is getting higher and higher, the power density requirements of the power supply are also getting higher and higher. Traditional air-cooled heat dissipation has been unable to effectively dissipate the heat energy accumulated by the power supply.

At present, most high-power-density power supplies generally use liquid-cooled radiators to dissipate the heat generated by the power supply quickly, and the liquid-cooled radiator has the characteristics of low noise and low energy consumption, which is very suitable for large Thermal dissipation of power and high power density power supplies.

However, the way of liquid cooling and heat dissipation has a high probability of leakage of cold liquid. If the leakage of cold liquid cannot be detected in time, the cold liquid will cause serious hazards such as equipment failure and power burnout.

Contents of the invention

The application provides a liquid leakage detection device and a power supply. The liquid leakage detection device is installed at the liquid inlet and outlet of the power supply cooling liquid, and can detect in real time whether there is liquid leakage at the liquid inlet and liquid outlet of the power supply cooling liquid. Prevent the cold liquid from causing serious damage to the equipment and power supply.

In the first aspect, the application provides a liquid leakage detection device. The liquid leakage detection device may include a detection box, a detection capacitor, and a detection unit. Corresponding to the liquid outlet, wherein the detection capacitor can also be arranged in the accommodation cavity, the detection unit is connected to the detection capacitor, the detection unit can detect the capacitance information of the detection capacitor, and can judge whether the detection capacitor is abnormal according to the capacitance information. When the cooling liquid inlet and/or the cooling liquid outlet of the power supply are leaking cold liquid, the leaked cold liquid enters the housing cavity from the opening of the housing chamber, and the cold liquid entering the housing chamber will cause the detection capacitor to If the capacitance value becomes abnormal, the detection unit can detect the abnormal capacitance information, and judge the leakage of the liquid inlet and/or liquid outlet of the power cooling liquid according to the abnormal capacitance information, and then find the leakage in time , improve the safety of power supply, and reduce the harm caused by leakage.

In one embodiment, the detection capacitance may include a first detection electrode plate, a detection paper and a second detection electrode plate arranged in layers, wherein the detection paper can absorb the leakage. Specifically, the first detecting electrode plate and/or the second detecting electrode plate are provided with a leaking liquid passing area through which the leaking liquid passes. When the liquid leaks, the leaked cold liquid can pass through the leakage area and flow onto the detection paper. After the detection paper absorbs the cold liquid, the first detection electrode plate and the second detection electrode plate can be in a conduction state , which in turn leads to a change in the capacitance between the first detection electrode plate and the second detection electrode plate. When the detection circuit can detect the capacitance change (abnormality) between the first detection electrode plate and the second detection electrode plate, it can judge Leakage from the inlet and/or outlet of cooling fluid from the power supply.

It should be noted that the first detection electrode plate and/or the second detection electrode plate can be provided with a plurality of hollow parts, and the hollow parts run through the thickness direction of the first detection electrode plate and the second detection electrode plate, so that the first detection electrode plate The detection electrode plate and/or the second detection electrode plate may form a leaking liquid passing region for the leaking liquid to pass through.

In the above embodiment, the first detection electrode plate can specifically be a mesh-shaped metal plate, wherein the metal plate can be a copper plate or other alloy conductive plates, which are not listed here; the detection paper can be a metal plate containing a fixed conductive medium. For example, the detection paper can be composed of foam and sodium chloride; the second detection electrode plate can be a thin copper sheet or other metal alloy conductors.

In one embodiment, the detection unit may include a detection circuit and a logic processing circuit, wherein one end of the detection circuit is connected to the second detection electrode plate, and the other end of the detection circuit is connected to the logic processing circuit, and the logic processing circuit can detect the detected Check whether the output level of the circuit is abnormal. If the level is abnormal, there is a problem of liquid leakage at the inlet and/or outlet of the cooling liquid of the power supply.

More specifically, the detection circuit may include a comparator, one end of the comparator is connected to the second detection electrode plate, and the other end of the comparator is connected to the logic processing circuit. When there is liquid, the first detection electrode plate and the second detection electrode plate are relatively insulated, and the level output by the comparator is the first level (the current is small); when the liquid inlet and/or liquid outlet of the power supply cold liquid When liquid leakage occurs at the mouth, the test paper conducts between the first detection electrode plate and the second detection electrode plate, and the level output by the comparator is the second level (larger current), and the logic processing circuit can be based on the first The change of the power level and the second level is used to judge whether the liquid inlet and/or the liquid outlet of the power supply cooling liquid leaks, thereby improving the safety of the power supply and reducing the harm caused by the leakage.

In a possible embodiment, in order to facilitate the use of the liquid leakage detection device, a power supply terminal and a ground terminal can be provided on the side wall of the detection box, wherein one end of the power supply terminal can be connected to the first detection electrode plate to supply power. The other end of the terminal is connected to the power supply circuit, one end of the comparator can be connected to the ground terminal, and the other end of the comparator is connected to the second detection electrode plate.

In the above-mentioned embodiment, in order to let the user quickly know whether the cooling liquid of the power supply has leaked, the liquid leakage detection device may also include an alarm unit, which is connected to the detection unit, and when the detection unit judges that the cooling liquid of the power supply has entered When liquid leakage occurs at the liquid outlet and/or the liquid outlet, the detection unit can control the alarm unit to generate an audible and visual alarm signal to prompt the user or maintenance personnel to perform maintenance.

In the second aspect, the present application also provides a power supply, including a casing, a heat dissipation device, a power supply module, and the liquid leakage detection device in any of the above technical solutions, wherein the power supply module and part of the heat dissipation device are arranged in the casing, and the heat dissipation device English dissipates heat for the power module, the liquid inlet and outlet of the heat dissipation device are arranged outside the casing, and the liquid leakage detection device is also arranged outside the casing, and in the first direction, the opening of the liquid leakage detection device is located at the heat dissipation Below the liquid inlet and outlet of the device, so that when liquid leakage occurs at the liquid inlet and/or outlet of the cooling device, the leaked cold liquid can enter the leakage detection device through the opening and enter the leakage The cold liquid in the detection device will cause the capacitance value of the detection capacitor to become abnormal. The detection unit can detect the abnormal capacitance information, and judge the leakage of the cooling liquid inlet and/or outlet of the power supply according to the abnormal capacitance information. Liquid, and then can find the leakage in time, improve the safety of the power supply, and reduce the harm caused by the leakage.

It should be noted that, in order to further reduce the hazards caused by the leakage of the power supply cooling liquid, it may also include a valve body assembly for controlling the liquid inlet into the liquid inlet. The valve body assembly may specifically include a drive unit and a valve. When the power supply cooling liquid leaks The detection unit can send a driving signal to the driving unit to close the valve, thereby reducing the leakage of the cooling liquid of the power supply, thereby reducing the harm caused by the leakage of the cooling liquid of the power supply.

Description of drawings

FIG. 1 is a schematic structural diagram of a power supply provided by an embodiment of the present application;

Fig. 2 is a side view of the liquid leakage detection device provided by the embodiment of the present application;

Fig. 3 is a flowchart of the detection of the liquid leakage detection device provided by the embodiment of the present application;

FIG. 4 is a schematic structural diagram of a liquid leakage detection device provided in an embodiment of the present application;

Fig. 5a is a top view of the first detection electrode plate in the liquid leakage detection device provided by the embodiment of the present application;

Fig. 5b is a top view of the detection paper in the liquid leakage detection device provided by the embodiment of the present application;

Fig. 5c is a top view of the second detection electrode plate in the liquid leakage detection device provided by the embodiment of the present application.

Reference signs:

1-shell; 2-radiating device; 20-liquid inlet; 21-liquid outlet; 3-power module; 4-leakage detection device; 40-detection box; 41-detection capacitor; 410-first detection electrode plate ; 4100-the first metal connection column; 411-detection paper; 412-the second detection electrode plate; 4120-the second metal connection column; 42-detection unit; 420-detection circuit; 421-logic processing circuit; 43-alarm unit ; 44-power supply terminal; 45-ground terminal.

Detailed ways

In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings.

In the prior art, with the gradual increase in the power density requirements of the power supply, the heat dissipation of the power supply is generally carried out in a liquid-cooled manner. Generally, a liquid-cooled power supply uses a cold liquid tube for conduction heat dissipation, and liquid leakage is prone to occur at the interface. The leaked liquid has a certain conductivity, and the leaked liquid will cause serious harm to the equipment and power supply.

The current way of detecting liquid leakage is realized by means of a detection rope. However, the assembly of the production device in this way is cumbersome, the detection range is small, and there is a problem of untimely detection.

To this end, the application provides a liquid leakage detection device, which can detect in real time whether the liquid inlet and outlet of the cold liquid of the power supply are leaking, and the liquid leakage detection device can be conveniently installed on the power supply.

The terms used in the following examples are for the purpose of describing particular examples only, and are not intended to limit the application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also Expressions such as "one or more" are included unless the context clearly dictates otherwise.

Reference to "one embodiment" or "some embodiments" or the like in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean "one or more but not all embodiments" unless specifically stated otherwise. The terms "including", "comprising", "having" and variations thereof mean "including but not limited to", unless specifically stated otherwise.

Fig. 1 is a schematic structural diagram of a power supply provided by the embodiment of the present application. The direction of the arrow in Fig. 1 is the first direction. Referring to Fig. 1, the power supply may include a housing 1, a cooling device 2, a power module 3 and a liquid leakage detection device 4 The power module 3 is arranged in the casing 1, and at least part of the cooling device 2 is also arranged in the casing. The cooling device 2 arranged in the casing 1 can dissipate heat to the power module 3 to ensure that the power module 3 can continue to work stably. Wherein, the liquid inlet 20 and the liquid outlet 21 of the cooling device 2 are arranged on the outside of the casing 1, and the liquid leakage detection device 4 is detachably arranged on the outside of the casing 1, and along the first direction, the liquid leakage detection device 4 is located above the Below the liquid inlet 20 and the liquid outlet 21, to ensure that most of the liquid leaked from the liquid inlet 20 and/or the liquid outlet 21 can flow into the leakage detection device 4. Specifically, when the heat dissipation device 2 dissipates heat from the power module 3, the cold liquid in the cooling device can enter the interior of the housing 1 through the liquid inlet of the heat dissipation device 2, and take out the heat generated by the power module 3 to absorb the heat. The cold liquid flows back to the cooling device through the liquid outlet, so as to continuously cool down the power module 3, wherein, when there is leakage of cold liquid at the liquid inlet 20 and/or liquid outlet 21, the leaked cold liquid can pass through The opening of the liquid leakage detection device 4 enters the liquid leakage detection device 4, and the cold liquid entering the liquid leakage detection device 4 will cause the capacitance value of the detection capacitor 41 in the liquid leakage detection device 4 to become an abnormal state, and the liquid leakage detection The detection unit 42 in the device 4 can detect abnormal capacitance information, and judge that there is leakage at the liquid inlet 20 and/or liquid outlet 21 of the power cooling liquid according to the abnormal capacitance information, and then can find out in time Liquid leakage improves the safety of power supply and reduces the harm caused by liquid leakage.

It should be noted that the cooling device 2 can be a liquid-cooled heat sink, and the liquid-cooled heat sink can wrap the power module 3; in addition, in order to reduce the damage of the cooling liquid leakage to the equipment and the power supply, it can be installed in the liquid inlet 20 or in the cooling device. A valve body assembly is provided, and the setting of the valve body assembly can not only control the amount of cooling liquid entering the liquid inlet 20, but also quickly close the liquid inlet 20 to reduce the leakage of the power supply cooling liquid.

Specifically, the valve body assembly may include a drive unit and a valve, wherein the drive unit may be electrically connected to the detection unit 42 and the valve, and when the detection unit 42 detects that the cold liquid of the power supply is leaking, the detection unit 42 may launch a closed valve to the drive unit. The driving signal of the valve, the driving unit receives the above-mentioned driving signal, and drives the valve to close, thereby reducing the leakage of the cooling liquid of the power supply, thereby reducing the harm caused by the leakage of the cooling liquid of the power supply.

The liquid leakage detection device in the above embodiments will be described in detail below.

Fig. 2 is a side view of the detection device, and Fig. 3 is a flow chart of detection by the detection device, with reference to Fig. 1, Fig. 2 and Fig. 3, the leakage detection device 4 may include a detection box 40, a detection capacitor 41 and a detection unit 42, wherein, The detection box 40 has an accommodating cavity, and one end of the accommodating cavity has an opening, and the opening corresponds to the liquid inlet 20 and the liquid outlet 21 of the cold liquid in the power supply. In addition, the detection capacitor 41 is also arranged in the accommodating cavity, and the detection unit 42 and the The detection capacitor is connected, and the detection unit 42 can detect the capacitance information of the detection capacitor 41 , and can judge whether the detection capacitor is abnormal according to the capacitance information. When the cooling liquid inlet 20 of the power supply and/or the liquid outlet 21 of the cooling liquid is leaking cold liquid, the leaked cold liquid will drop into the receiving chamber under the action of gravity, and will drop into the cooling liquid in the receiving chamber. The liquid will react with the detection capacitor 41, and make the capacitance value of the detection capacitor 41 into an abnormal state. The detection unit 42 can detect the capacitance information of the abnormal state, and judge the liquid inlet of the power cooling liquid according to the capacitance information of the abnormal state. 20 and/or the liquid outlet 21 has the problem of leakage, and then the leakage can be found in time, the safety of power supply can be improved, and the harm caused by leakage can be reduced.

In one embodiment, the detection capacitor 41 may include a first detection electrode plate 410, a detection paper 411 and a second detection electrode plate 412, wherein the detection paper 411 is arranged on the first detection electrode plate 410 and the second detection electrode plate 412 , and the detection paper 411 is also in contact with the first detection electrode plate 410 and the second detection electrode plate 412 respectively. Specifically, the first detection electrode plate 410 and/or the second detection electrode plate 412 may be provided with a leakage area through which the liquid leaks through, and the detection paper 411 can absorb the cold liquid, and when the power supply cold liquid does not leak, When the detection paper 411 does not absorb the cold liquid, the first detection electrode plate 410 and the second detection electrode plate 412 are relatively insulated. At this time, the capacitance value of the detection capacitor 41 is in a normal state; And/or when there is cold liquid leakage from the liquid outlet 21 of the cold liquid, the leaked cold liquid can pass through the leakage area and flow onto the detection paper 411. After the detection paper 411 absorbs the cold liquid, the detection paper 411 becomes The conductor can make the first detection electrode plate 410 and the second detection electrode plate 412 in a conduction state, thereby causing the capacitance between the first detection electrode plate 410 and the second detection electrode plate 412 to change, and the detection unit 42 can detect the capacitance change (abnormality) between the first detection electrode plate 410 and the second detection electrode plate 412, then it can be judged that the liquid inlet 20 and/or the liquid outlet 21 of the cooling liquid of the power supply leaks.

It should be noted that when specifically setting up the first detection electrode plate 410, the second detection electrode plate 412 and the detection paper 411, the first detection electrode plate 410 can be placed in the storage chamber close to the liquid inlet 20 and the outlet of the cold liquid of the power supply. Where the liquid port 21 is located, the detection paper 411 and the second detection electrode plate 412 are sequentially arranged on the side of the first detection electrode plate 410 facing away from the liquid inlet 20 and the liquid outlet 21 of the cold liquid of the power supply. More specifically, in order to allow the leaked cold liquid to pass through the first detection electrode plate 410 to reach the detection paper 411 and be absorbed by the detection paper 411, a plurality of hollow parts can be formed on the first detection electrode plate 410. The hollow parts The thickness direction of the first detection electrode plate 410 can be penetrated, and the plurality of hollowed out parts can make the first detection electrode plate 410 be formed with a leaking liquid passing area for the leaking liquid to pass through.

In one embodiment, FIG. 4 is a schematic structural diagram of a liquid leakage detection device, and FIG. 5a is a top view of the first detection electrode plate. Referring to FIGS. 4 and 5a, the first detection electrode plate 410 may be a mesh-shaped metal plate, Wherein, the metal plate can be a copper plate or other alloy conductive plates, which are not listed here; in addition, the first metal connection post 4100 can be provided on the first detection electrode plate 410, and the first metal connection post 4100 can be It is used to pass through the side wall of the detection box 40 so that when the first detection electrode plate 410 is set in the detection box 40 , the first detection electrode plate 410 can be conveniently connected to the power supply terminal 44 on the detection box 40 .

Fig. 5b is a top view of the detection paper. Referring to Fig. 5b, the detection paper 411 can be composed of a water-absorbing material containing a fixed conductive medium. Specifically, the detection paper 411 can be composed of foam and sodium chloride. When absorbing cold liquid, the detection paper 411 has better insulation, at this time, there is a first dielectric constant between the first detection electrode plate and the second detection electrode plate; after the detection paper 411 absorbs the cold liquid, the detection paper 411 It has better conductivity. At this time, there is a second dielectric constant between the first detection electrode plate and the second detection electrode plate, and the second dielectric constant is greater than the first dielectric constant, resulting in the capacitance value of the detection capacitor abnormal.

Figure 5c is a top view of the second detection electrode plate, referring to Figure 4 and Figure 5c, the second detection electrode plate 412 can be a thin copper sheet or other metal alloy conductor; and the second detection electrode plate 412 can be provided with a second The metal connection post 4120, the second metal connection post 4120 can also pass through the side wall of the detection box 40, so that when the second detection electrode plate 412 is arranged in the detection box 40, it is convenient to connect with the detection unit, and in the detection box 40 There is also a ground terminal 45 connected to the detection unit, which can improve the degree of integration.

It should be noted that the first metal connection post 4100, the second metal connection post 4120, the power supply terminal 44 and the ground terminal 45 are all arranged on the same side of the detection box 40, and the detection box is also provided with a through hole for the screw to pass through. The screw passes through the through hole and is connected with the casing, so that the detection box 40 is fixed on the casing.

In the above-mentioned embodiment, continue referring to FIGS. 1 to 3 , the detection unit 42 may include a detection circuit 420 and a logic processing circuit 421, one end of the detection circuit 420 may be connected to the second detection electrode plate 412, and the other end of the detection circuit 420 may be It is connected to the logic processing circuit 421, wherein the logic processing circuit 421 can detect whether the level output by the detection circuit 420 is abnormal, and if the level is abnormal, the side can judge that the liquid inlet 20 and/or the liquid outlet 21 of the power cooling liquid appear The problem of leakage.

Specifically, the detection circuit 420 may include a comparator, one end of the comparator may be connected to the second detection electrode plate 412, and the other end of the comparator may be connected to the logic processing circuit 421, when the power supply cold liquid inlet 20 and outlet When there is no liquid leakage at the liquid port 21, the detection paper 411 located between the first detection electrode plate 410 and the second detection electrode plate 412 has not absorbed the cold liquid, and between the first detection electrode plate 410 and the second detection electrode plate 412 has a larger resistance, at this time, the level output by the comparator is the first level (lower current), and when the logic processing circuit 421 detects the first level output by the comparator, the logic processing circuit 421 can judge that the power supply There is no problem of leakage of cold liquid; when the liquid inlet 20 and/or liquid outlet 21 of the power supply cold liquid leaks, the cold liquid passes through the first detection electrode plate 410 and is absorbed by the detection paper, so that the first detection electrode plate 410 and the second detection electrode plate 412, at this time, the level output by the comparator is the second level (larger current), and the logic processing circuit 421 can , to determine whether the liquid inlet 20 and/or the liquid outlet 21 of the power cooling liquid leaks, thereby improving the safety of the power supply and reducing the harm caused by the leakage.

In the above-mentioned embodiment, in order to let the user quickly know whether the power supply cold liquid leaks, the liquid leakage detection device 4 can also include an alarm unit 43, which is connected to the detection unit 42, and when the detection unit 42 judges that the power supply When liquid leakage occurs from the liquid inlet 20 and/or the liquid outlet 21 of the cold liquid, the detection unit 42 can control the alarm unit 43 to generate an audible and visual alarm signal to remind users or maintenance personnel to perform maintenance.

The above is only the specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application, and should cover Within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

A liquid leakage detection device is characterized in that it comprises:

A detection box, the detection box has a housing cavity, one end of the housing cavity is open, and the opening is used to correspond to the liquid inlet and liquid outlet of the power cooling liquid;

detection capacitance, the detection capacitance is set in the accommodation cavity;

A detection unit, the detection unit is connected to the detection capacitor, the detection unit is used to detect the capacitance information of the detection capacitor, and judge whether the detection capacitor is abnormal according to the capacitance information.
The liquid leakage detection device according to claim 1, wherein the detection capacitance comprises a first detection electrode plate, a detection paper and a second detection electrode plate arranged in layers, wherein the first detection electrode plate and /or the second detection electrode plate has a leakage through area, the detection paper is used to absorb the leakage, and when the detection paper absorbs the leakage, the detection paper conducts electricity, and the detection unit can detect A change in capacitance between the first detection electrode plate and the second detection electrode plate.
The liquid leakage detection device according to claim 2, characterized in that, the first detection electrode plate and/or the second detection electrode plate have a plurality of hollowed out parts, and the hollowed out parts form the leakage hole. pass.
The liquid leakage detection device according to claim 2, wherein the first detection electrode plate is a mesh metal plate.
The liquid leakage detection device according to claim 2 or 3, wherein the detection unit includes a detection circuit and a logic processing circuit connected to each other, the detection circuit is connected to the second detection electrode plate, and the logic The processing circuit is used to detect whether the output level of the detection circuit is abnormal.
The liquid leakage detection device according to claim 5, wherein the detection circuit includes a comparator, the inverting input terminal of the comparator is connected to the second detection electrode plate, and the output terminal of the comparator Connected with the logic processing circuit.
The liquid leakage detection device according to any one of claims 2 to 6, wherein a power supply terminal and a ground terminal are provided on the side wall of the detection box, and one end of the power supply terminal is connected to the first detection electrode. The other end of the power supply terminal is connected to the power supply circuit, one end of the detection unit is connected to the second detection electrode plate, and the other end of the detection unit is connected to the ground terminal.
The liquid leakage detection device according to any one of claims 2 to 7, further comprising an alarm unit connected to the detection unit.
A power supply, characterized in that it comprises a casing, a cooling device, a power supply module, and the liquid leakage detection device according to any one of claims 1 to 8, the power supply module and part of the cooling device are arranged in the casing , the liquid inlet and outlet of the heat sink are located outside the housing, the liquid leakage detection device is detachably connected to the housing, and in the first direction, the liquid leakage detection device is located on the Below the liquid inlet and the liquid outlet.
The power supply according to claim 9, further comprising a valve body assembly for controlling the liquid inlet into the liquid inlet, and the valve body assembly is connected with the detection unit.
The power supply according to claim 10, wherein the valve body assembly includes a valve and a driving unit, and the driving unit is connected with the detection unit to control the opening and closing of the valve.