Liquid leakage detection device

Abstract

The invention discloses a liquid leakage detection device. The device comprises a water tank; the differential pressure sensor is arranged outside the water tank; the first end of the high-position pressure tapping pipe is an open end and is higher than the highest liquid level in the water tank, and the high-position pressure tapping pipe is connected with the first connector of the differential pressure sensor; the first end of the low-position pressure tapping pipe is an open end, is inserted into the water tank and is lower than the highest liquid level in the water tank, the second end of the low-position pressure tapping pipe extends out of the water tank and is connected with the second end of the high-position pressure tapping pipe through a switch valve, and the low-position pressure tapping pipe is connected with the second connector of the differential pressure sensor. A liquid level sensor is replaced by the differential pressure sensor, and whether the water tank leaks liquid or not can be accurately monitored through the differential pressure change between the pressure of the low-position pressure tapping pipe and the pressure of the high-position pressure tapping pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature control cabinets, and more specifically to a liquid leakage detection device. Background Art

[0002] The temperature control cabinet has a water tank for storing cooling water. The water tank circulates cooling water to lower the temperature inside the cabinet to ensure that the equipment inside the cabinet operates normally within the appropriate temperature range. It should be noted that leakage from the water tank will damage the electrical components in the equipment, which will cause the equipment to not operate normally. Therefore, it is necessary to monitor the water tank in real time to see if there is any leakage.

[0003] In the prior art, a liquid level sensor is arranged on the top of the water tank, and a probe of the liquid level sensor is inserted into the water tank. The liquid level sensor detects the liquid level height of the water tank in real time, and monitors whether the water tank is leaking by comparing the real-time liquid level height of the water tank with the specified liquid level height of the water tank.

[0004] In the process of implementing the present invention, the inventors found that the prior art has at least the following problems:

[0005] First, the accuracy of current liquid level sensors cannot reach less than 1mm, making it impossible to monitor tiny leaks in water tanks.

[0006] Second, when the tank liquid level fluctuates, the level sensor reading will fluctuate, which in turn affects the tank liquid level measurement.

[0007] Therefore, how to accurately monitor whether a water tank is leaking is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0008] In view of this, an object of the present invention is to provide a liquid leakage detection device, which can accurately monitor whether a water tank is leaking.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A liquid leakage detection device, comprising:

[0011] Water tank;

[0012] A differential pressure sensor is arranged outside the water tank;

[0013] A high-position pressure-taking pipe, wherein the first end of the high-position pressure-taking pipe is an open end and is higher than the highest liquid level in the water tank, and the high-pressure pressure-taking pipe is connected to the first interface of the differential pressure sensor;

[0014] A low-level pressure-taking pipe, wherein the first end of the low-level pressure-taking pipe is an open end and is inserted into the water tank and is lower than the highest liquid level in the water tank, the second end of the low-level pressure-taking pipe extends out of the water tank and is connected to the second end of the high-level pressure-taking pipe through a switch valve, and the low-level pressure-taking pipe is connected to the second interface of the differential pressure sensor.

[0015] Preferably, it also includes an alarm, which is arranged outside the water tank and is connected to the control system via an electrical signal.

[0016] Preferably, the first end of the low-level pressure-taking pipe is located at the lowest liquid level of the water tank.

[0017] Preferably, the first end of the high-position pressure-taking pipe is inserted into the water tank, and the second end of the high-position pressure-taking pipe extends out of the water tank.

[0018] Preferably, the second end of the low-position pressure-taking pipe and the second end of the high-position pressure-taking pipe extend from the bottom position of the same side wall of the water tank.

[0019] Preferably, the outer pipe section of the high-position pressure taking pipe extending out of the water tank is connected to the first interface of the differential pressure sensor, the outer pipe section of the low-position pressure taking pipe extending out of the water tank is connected to the second interface of the differential pressure sensor, and the differential pressure sensor is located between the outer pipe sections of the high-position pressure taking pipe and the low-position pressure taking pipe.

[0020] Preferably, outer pipe sections of the high-position pressure-taking pipe and the low-position pressure-taking pipe are both bent.

[0021] Preferably, it also includes a liquid level sensor, which is arranged on the top of the water tank and has a probe inserted into the water tank, and the liquid level sensor is electrically connected to the control system.

[0022] Preferably, a wave-breaking plate in the shape of an “X” is provided in the water tank at a position directly opposite to the liquid level sensor, and the probe is inserted into the wave-breaking plate.

[0023] Preferably, it also includes a cabinet, the water tank is arranged on the bottom plate of the cabinet, and the outer pipe sections of the high-position pressure-taking pipe and the low-position pressure-taking pipe extending out of the water tank are both arranged on the bottom plate of the cabinet, and the differential pressure sensor is arranged on the bottom plate of the cabinet and is located between the outer pipe sections of the high-position pressure-taking pipe and the low-position pressure-taking pipe.

[0024] Before the leakage detection device provided by the present invention starts to operate, the switch valve is opened, and the high-level pressure-taking pipe and the low-level pressure-taking pipe are connected, which is equivalent to a communicating vessel. The cooling water in the water tank will flow into the high-level pressure-taking pipe through the low-level pressure-taking pipe. After the pressure of the low-level pressure-taking pipe and the high-level pressure-taking pipe is balanced, the liquid level of the high-level pressure-taking pipe is level with the liquid level in the water tank, and the switch valve is closed, and the liquid level in the high-level pressure-taking pipe remains unchanged. If the water tank leaks, the liquid level in the water tank will decrease, even if the liquid level of the low-level pressure-taking pipe decreases. At this time, the differential pressure sensor detects that the pressure difference between the low-level pressure-taking pipe and the high-level pressure-taking pipe is not zero, and transmits the signal to the control system, and after the algorithm processing, the leakage amount can be obtained. At this time, the leakage amount is not zero; if the water tank does not leak, the differential pressure sensor detects that the pressure difference between the low-level pressure-taking pipe and the high-level pressure-taking pipe is zero, and transmits it to the control system, and after the algorithm processing, it can be obtained that the leakage amount is zero.

[0025] In summary, the present invention has the following beneficial effects:

[0026] 1. Since the pipeline liquid level is positively correlated with the pipeline pressure, and the differential pressure sensor can achieve a 2Pa differential pressure value, corresponding to a 0.2mm liquid level change, the differential pressure sensor has high detection accuracy. Even if a small leak occurs in the water tank, the differential pressure sensor can detect the pressure difference between the low-level pressure-taking pipe and the high-level pressure-taking pipe, thereby monitoring small leaks in the water tank.

[0027] 2. Since the differential pressure sensor is used to monitor the pressure difference change between the low-level pressure-taking pipe and the high-level pressure-taking pipe to determine whether the water tank is leaking, as long as the pressure difference remains unchanged, the measurement accuracy of the differential pressure sensor will not be affected even if the water tank liquid level fluctuates.

[0028] Therefore, the present invention can accurately monitor whether the water tank is leaking by utilizing the pressure difference change between the low-level pressure-taking pipe pressure and the high-level pressure-taking pipe pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0030] Figure 1 A schematic structural diagram of a liquid leakage detection device provided by the present invention;

[0031] Figure 2 for Figure 1 The temperature control cabinet in the system is used to monitor whether the water tank is leaking.

[0032] Reference numerals:

[0033] 1-cabinet; 2-water tank; 3-differential pressure sensor; 4-low-position pressure pipe; 5-high-position pressure pipe; 6-switch valve; 7-low-position pressure point; 8-high-position pressure point; 9-liquid level sensor; 10-wave-breaking board; 11-transparent sight tube; 12-water pump; 13-check valve. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The core of the present invention is to provide a liquid leakage detection device, which can accurately monitor whether a water tank is leaking.

[0036] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper" and "lower" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, "first" and "second" are only used to describe the effect, and cannot be understood as indicating or implying relative importance.

[0037] Please refer to Figure 1 and Figure 2 The present application provides a liquid leakage detection device, including a water tank 2, a pressure difference sensor 3, a low-position pressure-taking pipe 4, a high-position pressure-taking pipe 5 and a control system.

[0038] The differential pressure sensor 3 is arranged outside the water tank 2 .

[0039] It should be noted that the differential pressure sensor 3 is often used to measure the pressure difference between two components. The differential pressure sensor 3 has a diaphragm, a first interface and a second interface. Both interfaces are used to connect the pressure component to be measured through a pipeline. The diaphragm is used to directly sense the water pressure in the two interfaces and the micro-displacement proportional to the water pressure, thereby realizing the detection of the pressure difference value between the two components. In addition, the specific structure of the differential pressure sensor 3 can refer to the prior art, which is not the focus of the present invention and will not be described in detail herein.

[0040] The first end of the high-level pressure-taking pipe 5 is an open end and is higher than the highest liquid level in the water tank 2 , and the high-pressure pressure-taking pipe 5 is connected to the first interface of the differential pressure sensor 3 .

[0041] Specifically, the first end of the high-position pressure-taking pipe 5 is an open end, so that the high-position pressure-taking pipe 5 is connected to the atmosphere and only takes the static pressure of the water surface. It should be noted that the high-position pressure-taking pipe 5 can be set in the water tank 2, or it can be set outside the water tank 2. Both settings require that the first end of the high-position pressure-taking pipe 5 is higher than the highest liquid level of the water tank 2. Therefore, after the high-position pressure-taking pipe 5 is connected to the low-position pressure-taking pipe 4 and the pressure is balanced, the liquid level of the high-position pressure-taking pipe 5 is level with the liquid level of the water tank 2. In addition, a high-position pressure-taking point is set on the high-position pressure-taking pipe, and the high-position pressure-taking point is connected to the first interface of the differential pressure sensor 3 through a pipeline.

[0042] The first end of the low-level pressure taking pipe 4 is an open end and is inserted into the water tank 2 and is lower than the highest liquid level in the water tank 2. The second end of the low-level pressure taking pipe 4 extends out of the water tank 2 and is connected to the second end of the high-level pressure taking pipe 5 through the switch valve 6, and the low-level pressure taking pipe 4 is connected to the second interface of the differential pressure sensor.

[0043] Specifically, the second end of the low-level pressure-taking pipe 4 extends out of the water tank 2 and is connected to a valve port of the switch valve 6, and the other valve port of the switch valve 6 is connected to the second end of the high-level pressure-taking pipe 4, so that the low-level pressure-taking pipe 4 and the high-level pressure-taking pipe 4 are controllably connected through the switch valve 6. Preferably, the switch valve 6 can adopt a two-way valve with precise control and safe and reliable operation. Since the first end of the low-level pressure-taking pipe 4 is inserted into the water tank 2, and the first end of the low-level pressure-taking pipe 4 is an open end and is lower than the highest liquid level in the water tank 2, when the switch valve 6 is opened, the water in the water tank 2 will flow into the high-level pressure-taking pipe 5 through the low-level pressure-taking pipe 4. In addition, a low-level pressure-taking point is set on the low-level pressure-taking pipe, and the low-level pressure-taking point is connected to the second interface of the differential pressure sensor 3 through a pipeline. It should be noted that the low-level pressure-taking pipe 4 is sealed and connected to the water tank 2 to ensure the sealing of the water tank 2.

[0044] The control system electrical signal is connected to the pressure difference sensor 3.

[0045] Specifically, the control system generally includes a programmable logic controller and a host computer, the differential pressure sensor 3 is connected to the programmable logic controller through a wire, and the programmable logic controller is also connected to the host computer through a wire. Therefore, the differential pressure sensor 3 detects a differential pressure value and can transmit a signal to the programmable logic controller. After algorithm processing, the programmable logic controller can determine the size of the leakage, and the leakage can be transmitted to the host computer through a signal. The host computer can display the leakage data more intuitively to facilitate the user to determine whether the water tank 2 is leaking.

[0046] Before the above leakage detection device starts to operate, the switch valve 6 is opened, and the high-level pressure-taking pipe 5 and the low-level pressure-taking pipe 4 are connected, which is equivalent to a communicating vessel. The cooling water in the water tank 2 will flow into the high-level pressure-taking pipe 5 through the low-level pressure-taking pipe 4. After the pressure of the low-level pressure-taking pipe 4 and the high-level pressure-taking pipe 5 is balanced, the liquid level of the high-level pressure-taking pipe 5 is equal to the liquid level in the water tank 2, and the switch valve 6 is closed, and the liquid level in the high-level pressure-taking pipe 5 remains unchanged. If the water tank 2 leaks, the liquid level in the water tank 2 will decrease. Even if the liquid level of the low-level pressure-taking pipe 4 decreases, the pressure difference sensor 3 detects that the pressure difference between the low-level pressure-taking pipe 4 and the high-level pressure-taking pipe 5 is not zero, and transmits the signal to the control system. After the algorithm processing, the leakage amount can be obtained. At this time, the leakage amount is not zero; if the water tank 2 does not leak, the pressure difference sensor 3 detects that the pressure difference between the low-level pressure-taking pipe 4 and the high-level pressure-taking pipe 5 is zero, and transmits the signal to the control system. After the algorithm processing, it can be obtained that the leakage amount is zero.

[0047] Therefore, compared with the prior art method of using the liquid level sensor 9 to monitor whether the water tank 2 is leaking, the present invention can accurately monitor whether the water tank 2 is leaking by using the pressure difference change between the low-level pressure taking pipe 4 and the high-level pressure taking pipe 5.

[0048] On the basis of the above-mentioned embodiment, the present invention further comprises an alarm, which is arranged outside the water tank 2 and the electrical signal of which is connected to the control system.

[0049] Specifically, the alarm can be set at any position of the cabinet 1. The alarm is preferably set on the outer shell of the cabinet 1, which is not only convenient for users to hear the sound of the alarm in a timely and clear manner, but also does not occupy the internal space of the cabinet 1. The alarm is connected to the host computer in the control system through a wire, and the pressure difference value signal detected by the pressure difference sensor 3 is transmitted to the programmable logic controller. After algorithm processing, the programmable logic controller transmits the leakage amount signal to the host computer. If the host computer determines that the leakage amount is not zero, the alarm is controlled to sound an alarm to remind the user to repair it; if the host computer determines that the leakage amount is zero, the alarm is not controlled to operate. Therefore, the use of an alarm can remind users to repair the water tank 2 in time, thereby avoiding excessive water leakage in the water tank 2 and damaging the electrical components in the cabinet 1, and ensuring the normal operation of the equipment in the cabinet 1.

[0050] Based on the above examples, please refer to Figure 1 and Figure 2 The insertion portion of the low-level pressure-taking pipe 4 is arranged at the lowest liquid level of the water tank 2 .

[0051] Specifically, the lowest point of the water tank 2 has the lowest liquid level, and a plug hole is provided on the side wall or bottom wall corresponding to the lowest point of the water tank 2, and the first end of the low-level pressure-taking pipe 4 is provided in the plug hole. Thus, on the one hand, the length of the low-level pressure-taking pipe 4 can be simplified, and on the other hand, before all the cooling water in the water tank 2 leaks out, the pressure difference sensor 3 can detect the pressure difference between the high-level pressure-taking pipe 5 and the low-level pressure-taking pipe 4, and then the control system can calculate the leakage amount using the pressure difference value, which is convenient for subsequent maintenance and fluid replenishment.

[0052] Based on the above examples, please refer to Figure 2 The first end of the high-position pressure-taking pipe 5 is inserted into the water tank 2 , and the second end of the high-position pressure-taking pipe 5 extends out of the water tank 2 .

[0053] Specifically, the first end of the high-level pressure-taking pipe 5 is inserted into the water tank 2. Since the first end of the high-level pressure-taking pipe 5 is lower than the highest liquid level in the water tank 2, it is possible to prevent the cooling water in the water tank 2 from being poured into the high-level pressure-taking pipe 5 and affecting the pressure difference detection between it and the low-level pressure-taking pipe 4. The second end of the high-level pressure-taking pipe 5 extends out of the water tank 2 and is connected to the switch valve 6 to achieve connection with the low-level pressure-taking pipe 4. It should be noted that the high-level pressure-taking pipe 5 is sealed and connected to the water tank 2 to ensure that the water tank 2 is sealed. Therefore, the high-level pressure-taking pipe 5 is partially located in the water tank 2 using the above-mentioned setting method, which is conducive to saving the internal space of the cabinet 1.

[0054] Preferably, the inner pipe section of the high-position pressure-taking pipe 5 inserted into the water tank 2 is vertically arranged, and the inner pipe section of the low-position pressure-taking pipe 4 inserted into the water tank 2 is vertically arranged. This can not only save the length of the pipe section to save costs, but also facilitate the smooth flow of fluid between the low-position pressure-taking pipe 4 and the high-position pressure-taking pipe 5 to achieve pressure balance at a faster speed.

[0055] For further information, please refer to Figure 2 The inner pipe section of the high-position pressure-taking pipe 5 inserted into the water tank 2 is vertically fixedly connected to the inner wall of the water tank 2. Specifically, the inner pipe section of the high-position pressure-taking pipe 5 can be connected to the side wall of the water tank 2 through a fixing member, or the inner pipe section of the high-position pressure-taking pipe 5 can be directly welded to the side wall of the water tank 2, which can enhance the water impact resistance of the high-position pressure-taking pipe 5 and ensure the stability of the structure of the high-position pressure-taking pipe 5.

[0056] Based on the above examples, please refer to Figure 1 The second end of the low-position pressure-taking pipe 4 and the second end of the high-position pressure-taking pipe 5 extend from the bottom position of the same side wall of the water tank 2 .

[0057] Specifically, the water tank 2 is generally installed at the bottom of the cabinet 1, and the internal space of the cabinet 1 is limited. The second ends of the low-position pressure-taking pipe 4 and the high-position pressure-taking pipe 5 both pass through the box body 2 from the same side wall at the bottom of the box body, so that the outer pipe sections of the low-position pressure-taking pipe 4 and the high-position pressure-taking pipe 5 extending out of the water tank 2 are arranged at the bottom of the cabinet 1 on the same side, which is conducive to saving the internal space of the cabinet 1.

[0058] Based on the above examples, please refer to Figure 1 The outer pipe section of the high-position pressure-taking pipe 5 extending out of the water tank 2 is connected to the first interface of the differential pressure sensor 3, the outer pipe section of the low-position pressure-taking pipe 4 extending out of the water tank 2 is connected to the second interface of the differential pressure sensor 3, and the differential pressure sensor 3 is located between the outer pipe sections of the high-position pressure-taking pipe 5 and the low-position pressure-taking pipe 4.

[0059] Specifically, the high-position pressure point 8 is located on the outer pipe section of the high-position pressure-taking pipe 5, and the pipe section at the position of the high-position pressure-taking point 8 is connected to the first interface of the differential pressure sensor 3 through the high-position pressure-taking pipe, and the low-position pressure point 7 is located on the outer pipe section of the low-position pressure-taking pipe 4, and the pipe section at the position of the low-position pressure-taking point 7 is connected to the second interface of the differential pressure sensor 3 through the low-position pressure-taking pipe, thereby realizing that the differential pressure sensor 3 takes pressure from the high-position pressure-taking pipe 5 and the low-position pressure-taking pipe 4. Further, the high-position pressure-taking pipe and the low-position pressure-taking pipe are located between the outer pipe sections of the high-position pressure-taking pipe 5 and the low-position pressure-taking pipe 4 on the same side. With this arrangement, on the one hand, it can avoid the situation where the pressure-taking pipe passes through the water tank 2 and causes a complicated layout, so as to facilitate and simplify the arrangement of the pressure-taking pipe, that is, to facilitate the pressure-taking of the differential pressure sensor 3, and on the other hand, it can save the internal space of the cabinet 1.

[0060] Based on the above examples, please refer to Figure 1 The outer pipe sections of the high-position pressure-taking pipe 5 and the low-position pressure-taking pipe 4 are both bent.

[0061] It can be understood that other electrical components are usually provided at the bottom of the cabinet 1, and the outer pipe sections of the high-level pressure-taking pipe 5 and the low-level pressure-taking pipe 4 are arranged in a bent shape, which can better pass over other electrical components to flexibly adapt to different internal spaces of the cabinet 1. In addition, the bent pipe can also effectively alleviate the impact force of the fluid, thereby reducing the damage to both the high-level pressure-taking pipe 5 and the low-level pressure-taking pipe 4, thereby increasing the service life of the high-level pressure-taking pipe 5 and the low-level pressure-taking pipe 4.

[0062] Based on the above examples, please refer to Figure 2 The present invention further comprises a liquid level sensor 9, which is arranged at the top of the water tank 2 and has its probe inserted into the water tank 2, and the liquid level sensor 9 is electrically connected to the control system.

[0063] Thus, the liquid level sensor 9 can detect the real-time liquid level of the water tank 2 by using the probe inserted into the water tank 2, and transmit the real-time liquid level signal to the control system, and the control system compares the real-time liquid level with the preset maximum liquid level to determine whether the water tank 2 is leaking. The present invention uses the liquid level sensor 9 and the pressure difference sensor 3 to monitor whether the water tank 2 is leaking. If either of them fails, the other can continue to monitor whether the water tank 2 is leaking.

[0064] Based on the above examples, please refer to Figure 2 A wave-breaking plate 10 in the shape of a Chinese character "X" is provided in the water tank 2 at a position opposite to the liquid level sensor 9, and the probe is inserted in the wave-breaking plate 10.

[0065] Specifically, the wave-breaking plate 10 is vertically arranged in the water tank 2 and directly faces the liquid level sensor 9. The wave-breaking plate 10 is in a "J" shape, so that the probe inserted in the wave-breaking plate 10 contacts the cooling water in the water tank 2 to realize the liquid level height detection of the water tank 2. The wave-breaking plate 10 wraps the liquid level sensor 9, which can prevent the liquid level fluctuation from affecting the collected value of the liquid level sensor 9, which is beneficial to improve the detection accuracy of the liquid level sensor 9.

[0066] Based on the above examples, please refer to Figure 2 A transparent sight glass tube 11 is provided on the outer side wall of the water tank 2 and is extended along the height direction of the water tank 2 .

[0067] Specifically, the transparent sight glass 11 is usually made of transparent material, and the user can clearly see the liquid level in the water tank 2 through the transparent sight glass, so that the user can directly observe the liquid level height of the water tank 2 to determine whether the water tank 2 is leaking.

[0068] Based on the above examples, please refer to Figure 1 The present invention also includes a cabinet 1, a bottom plate is provided at the bottom end of the cabinet 1, and a water tank 2 is provided on the bottom plate of the cabinet 1 to achieve fixed installation of the water tank 2.

[0069] The extensions of the high-position pressure-taking pipe 5 and the low-position pressure-taking pipe 4 are also arranged on the bottom plate of the cabinet 1, which not only realizes the fixed installation of the two pipes, but also arranges the two pipes adjacent to the bottom plate, which can increase a certain amount of cooling to the bottom plate, which is beneficial to the heat dissipation and cooling of the bottom plate or the electrical components thereon.

[0070] The differential pressure sensor 3 is arranged on the bottom plate of the cabinet 1 to realize the fixed installation of the differential pressure sensor 3. It is located between the extensions of the high-position pressure-taking pipe 5 and the low-position pressure-taking pipe 4, so that the two pipes are conveniently connected to the two interfaces of the differential pressure sensor 3, which is conducive to the compact arrangement of the high-position pressure-taking pipe 5, the low-position pressure-taking pipe 4 and the differential pressure sensor 3, thereby saving the internal space of the cabinet 1.

[0071] Based on the above examples, please refer to Figure 2 The present invention also includes a water pump 12, a one-way valve 13, a circulation pipeline and a radiator. The water-cooling circulation pipeline is arranged in the cabinet 1, and the liquid inlet end and the liquid return end of the water-cooling circulation pipeline are both connected to the inside of the water tank 2. The water pump 12 and the one-way valve 13 are arranged on the water-cooling circulation pipeline in sequence from near to far from the liquid inlet end.

[0072] Among them, the one-way valve 13 mainly prevents the cooling water from flowing back and damaging the water pump 12. The water pump 12 mainly provides circulation power for the unit refrigeration, even if the cooling water in the water tank 2 circulates in the water cooling circulation pipeline.

[0073] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0074] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0075] The above is a detailed introduction to a liquid leakage detection device provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A liquid leakage detection device, characterized in that: include: Water tank (2); A differential pressure sensor (3) is arranged outside the water tank (2); A high-position pressure-taking pipe (5), wherein the first end of the high-position pressure-taking pipe (5) is an open end and is higher than the highest liquid level in the water tank (2), and the high-pressure pressure-taking pipe (5) is connected to the first interface of the differential pressure sensor (3); A low-position pressure-taking pipe (4), wherein the first end of the low-position pressure-taking pipe (4) is an open end and is inserted into the water tank (2) and is lower than the highest liquid level in the water tank (2); the second end of the low-position pressure-taking pipe (4) extends out of the water tank (2) and is connected to the second end of the high-position pressure-taking pipe (5) via a switch valve (6); and the low-position pressure-taking pipe (4) is connected to the second interface of the differential pressure sensor.

2. The liquid leakage detection device according to claim 1, characterized in that: It also comprises an alarm, which is arranged outside the water tank (2) and is connected to the control system via an electrical signal.

3. The liquid leakage detection device according to claim 1, characterized in that: The first end of the low-level pressure-taking pipe (4) is located at the lowest liquid level of the water tank (2).

4. The liquid leakage detection device according to claim 1, characterized in that: The first end of the high-position pressure-taking pipe (5) is inserted into the water tank (2), and the second end of the high-position pressure-taking pipe (5) extends out of the water tank (2).

5. The liquid leakage detection device according to claim 4, characterized in that: The second end of the low-position pressure-taking pipe (4) and the second end of the high-position pressure-taking pipe (5) extend from the bottom of the same side wall of the water tank (2).

6. The liquid leakage detection device according to claim 5, characterized in that: The outer pipe section of the high-position pressure-taking pipe (5) extending outside the water tank (2) is connected to the first interface of the differential pressure sensor (3), the outer pipe section of the low-position pressure-taking pipe (4) extending outside the water tank (2) is connected to the second interface of the differential pressure sensor (3), and the differential pressure sensor (3) is located between the outer pipe sections of the high-position pressure-taking pipe (5) and the low-position pressure-taking pipe (4).

7. The liquid leakage detection device according to claim 6, characterized in that: The outer pipe sections of the high-position pressure-taking pipe (5) and the low-position pressure-taking pipe (4) are both in a bent shape.

8. The liquid leakage detection device according to any one of claims 1 to 7, characterized in that: It also comprises a liquid level sensor (9), the liquid level sensor (9) being arranged at the top of the water tank (2) and having a probe inserted into the water tank (2), and the electrical signal of the liquid level sensor (9) being connected to the control system.

9. The liquid leakage detection device according to claim 8, characterized in that: A wave-breaking plate (10) in the shape of an “X” is provided in the water tank (2) at a position directly opposite to the liquid level sensor (9), and the probe is inserted into the wave-breaking plate (10).

10. The liquid leakage detection device according to any one of claims 1 to 7, characterized in that: It also comprises a cabinet (1), the water tank (2) being arranged on the bottom plate of the cabinet (1), and the outer pipe sections of the high-position pressure-taking pipe (5) and the low-position pressure-taking pipe (4) extending outside the water tank (2) being arranged on the bottom plate of the cabinet (1), and the differential pressure sensor (3) being arranged on the bottom plate of the cabinet (1) and being located between the outer pipe sections of the high-position pressure-taking pipe (5) and the low-position pressure-taking pipe (4).

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