Electric leakage detection device

Abstract

The utility model provides an electric leakage detection device, and relates to the technical field of electric leakage testing. The electric leakage detection device comprises a device body, a mobile power supply, an inverter, a current display and a test mechanism, the inverter and the current display are both arranged on the device body, and the mobile power supply is electrically connected with the inverter and / or the current display. A test loop is formed among the inverter, the current display and the test mechanism, the test mechanism is used for contacting a line of external equipment to detect leakage current, and the output voltage of the mobile power supply is less than 36V, so that leakage detection can be carried out safely, and the personal safety of testers is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of leakage testing, and in particular to a leakage detection device. Background Art

[0002] A data center is an industrial plant with extremely high electricity consumption. The modules that store servers generate heat due to the large amount of power consumed by the servers. Therefore, large-scale water-cooled precision air conditioners are installed to cool the modules. This results in extremely high electricity consumption in the data center. With so many electrical devices concentrated in the plant, leakage may occur at any time. Once leakage occurs in the electrical equipment, the leakage energy will eventually be converted into heat, and the accumulation of heat to a certain level will cause a fire.

[0003] In order to detect leakage in devices in a timely manner, wires are currently used in conjunction with devices such as light bulbs for testing. One end of the wire is connected to a 220V AC circuit, and the other end is placed close to the device for testing. If a leakage is detected, the light bulb will light up. However, if the detection time is too long, the insulation layer of the wire will melt. At this time, if a short circuit occurs in the device, the light bulb is at risk of breaking, and the risk to the tester himself is also very high. Utility Model Content

[0004] The purpose of the present application includes, for example, providing a leakage detection device that can perform leakage detection relatively safely.

[0005] This application can be implemented as follows:

[0006] The present application provides a leakage detection device, which includes a device body, a mobile power supply, an inverter, a current display and a testing mechanism. The inverter and the current display are both arranged on the device body, the mobile power supply is electrically connected to the inverter and / or the current display, and a test loop is formed between the inverter, the current display and the testing mechanism. The testing mechanism is used to contact the circuit of an external device to detect leakage current, wherein the output voltage of the mobile power supply is less than 36V.

[0007] Optionally, the mobile power supply includes a first mobile power supply and a second mobile power supply, the first mobile power supply is electrically connected to the inverter, and the second mobile power supply is electrically connected to the current display.

[0008] Optionally, a power switch is provided on the current display, and the second mobile power supply is electrically connected to the current display via the power switch.

[0009] Optionally, the output voltage of the mobile power supply is 3-7V, and the output current of the mobile power supply is 1-3A.

[0010] Optionally, the testing mechanism is a clamp-type testing mechanism, which is used to clamp on the circuit of the external device to detect leakage current.

[0011] Optionally, the clamp-type testing mechanism is a magnetoelectric effect current sensing clamp or a Hall effect current sensing clamp.

[0012] Optionally, the leakage detection device further includes a variable resistor, which is connected to the test circuit.

[0013] Optionally, the rheostat is a knob rheostat or a sliding rheostat.

[0014] Optionally, the maximum resistance of the variable resistor is less than 10KΩ.

[0015] Optionally, the leakage detection device further includes a test switch, which is connected to the test circuit.

[0016] Optionally, the leakage detection device further includes a protection switch, which is connected to the test circuit.

[0017] Optionally, the device body is made of PVC.

[0018] The beneficial effects of the leakage detection device of the present application include, for example, in order to enable relatively safe leakage detection, a leakage detection device is designed, which includes a device body, a mobile power supply, an inverter, a current display, and a testing mechanism. The inverter and the current display are both arranged on the device body, the mobile power supply is electrically connected to the inverter or the current display, and a test circuit is formed between the inverter, the current display, and the testing mechanism. The testing mechanism is used to contact the circuit of the external device to detect the leakage current. During the leakage detection process of the external device, the mobile power supply supplies power to the test circuit, and the inverter converts the direct current of the mobile power supply into alternating current. If the external device has a leakage, the current display can display the magnitude of the leakage current when the testing mechanism contacts the circuit of the external device, thereby enabling the leakage device to be discovered in time so that the leakage device can be repaired in time, thereby effectively avoiding the occurrence of fires in the data center. Moreover, since a mobile power supply with an output voltage of less than 36V is used to power the test circuit, it is safer than directly connecting the wires to a 220V AC circuit, thereby ensuring the personal safety of the tester. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a circuit connection diagram of the leakage detection device in an embodiment of the present application;

[0021] Figure 2 Schematic diagram of the structure of the leakage detection device in the embodiment of the present application.

[0022] Icons: 1-device body; 2-mobile power supply; 21-first mobile power supply; 22-second mobile power supply; 3-inverter; 4-current display; 5-test mechanism; 6-variable resistor; 7-test switch; 8-protection switch. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0026] In the description of this application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application.

[0027] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0028] It should be noted that, in the absence of conflict, the features in the embodiments of this application can be combined with each other.

[0029] The inventors of this application have discovered that in order to promptly detect devices with leakage, wires are currently used in conjunction with devices such as light bulbs for detection. One end of the wire is connected to a 220V AC circuit through a power plug, and the other end is placed close to the device for detection. If a leakage is detected, the light bulb will light up, but if the detection time is slightly longer, the insulation layer of the wire will melt. At this time, if the device short-circuits, the light bulb is at risk of breaking, and the tester himself is also at high risk. Therefore, two testers are often required to work together, with one tester performing the test and the other acting as a safety officer, and the test time is relatively long. The embodiments of this application provide a leakage detection device that is at least used to solve the above-mentioned technical problems.

[0030] Please refer to Figure 1 、 Figure 2 The leakage detection device provided in the embodiment of the present application includes a device body 1, a mobile power supply 2, an inverter 3, a current display 4 and a testing mechanism 5. The inverter 3 and the current display 4 are both arranged on the device body 1. The mobile power supply 2 is electrically connected to the inverter 3 and / or the current display 4. A test loop is formed between the inverter 3, the current display 4 and the testing mechanism 5. The testing mechanism 5 is used to contact the circuit of the external device to detect the leakage current, wherein the output voltage of the mobile power supply 2 is less than 36V.

[0031] In this embodiment, the device body 1 is a low-voltage box, the mobile power supply 2 can be arranged inside the device body 1 or outside the device body 1, the inverter 3 is arranged inside the device body 1, a part of the current display 4 is arranged inside the device body 1, and the other part of the current display 4 is embedded in the box of the device body 1. The aforementioned part of the current display 4 is, for example, a circuit board of the current display, and the other part of the current display 4 is, for example, a display screen of the current display, so that the tester can judge whether the external device has leakage through the current data displayed by the current display 4; the contact method between the test mechanism 5 and the line of the external device includes direct contact and indirect contact; the connection of the line in the test loop is achieved by quick connection through male and female terminals; the external device can be an electrical device such as a transformer.

[0032] The mobile power supply 2 is electrically connected to the inverter 3 and / or the current display 4, including: the mobile power supply 2 is only electrically connected to the inverter 3, in which case the mobile power supply 2 supplies power to the test circuit through the inverter 3; or, the mobile power supply 2 is only electrically connected to the current display 4, in which case the mobile power supply 2 supplies power to the test circuit through the current display 4; or, the mobile power supply 2 is electrically connected to the inverter 3 and the current display 4 at the same time, in which case the mobile power supply 2 can supply power to the test circuit through the inverter 3 or through the current display 4.

[0033] It should be noted that the inverter 3 is a converter that converts DC power into constant frequency and constant voltage or frequency and voltage regulated AC power. It consists of an inverter bridge, control logic and filter circuit. Since the leakage current on the external device is AC, the inverter 3 can convert the DC power of the mobile power supply 2 into AC, so that the current on the test circuit matches the leakage current properties of the external device, thereby facilitating the detection of leakage conditions of the external device.

[0034] During leakage detection of external equipment, the mobile power supply 2 supplies power to the test circuit, and the inverter 3 converts the DC power of the mobile power supply 2 into AC power. If the external equipment has leakage, the current display 4 will be able to display the magnitude of the leakage current when the test mechanism 5 contacts the circuit of the external equipment. The tester judges whether the leakage current is higher than the reference value based on the magnitude of the displayed leakage current. If the tester judges that the leakage current is lower than the reference value based on the magnitude of the displayed leakage current, there is no need to repair the equipment. If the tester judges that the leakage current is higher than the reference value based on the magnitude of the displayed leakage current, it is necessary to repair the equipment in time, thereby effectively avoiding the occurrence of fire in the data center. In addition, since a mobile power supply 2 with an output voltage less than 36V is used to power the test circuit, it is safer than the detection method of directly connecting the wires to the 220V AC circuit through the power plug, thereby ensuring the personal safety of the tester.

[0035] It should be pointed out that the above-mentioned reference value is generally 300-500mA. For example, if the reference value is 500mA, if the tester judges that the leakage current is lower than 500mA based on the displayed leakage current, there is no need to repair the equipment. If the tester judges that the leakage current is higher than 500mA based on the displayed leakage current, the equipment needs to be repaired in time.

[0036] In this embodiment, the mobile power supply 2 includes a first mobile power supply 21 and a second mobile power supply 22 . The first mobile power supply 21 is electrically connected to the inverter 3 , and the second mobile power supply 22 is electrically connected to the current display 4 .

[0037] The first mobile power supply 21 is electrically connected to the inverter 3. The first mobile power supply 21 supplies power to the test circuit through the inverter 3. The inverter 3 converts the DC power of the first mobile power supply 21 into AC power, so that the current on the test circuit matches the leakage current on the external device; the second mobile power supply 22 is a backup power supply. The second mobile power supply 22 is electrically connected to the current display 4. When the first mobile power supply 21 is out of power, the second mobile power supply 22 supplies power to the test circuit through the current display 4. The inverter 3 converts the DC power provided by the second mobile power supply 22 into AC power to ensure that the test circuit can work normally.

[0038] In other embodiments, the mobile power supply 2 only includes the first mobile power supply 21, and the first mobile power supply 21 supplies power to the test circuit through the inverter 3. In this case, the current display 4 can work normally; or, the mobile power supply 2 only includes the second mobile power supply 22. In this case, the second mobile power supply 22 supplies power to the test circuit through the current display 4.

[0039] It should be noted that the first mobile power source 21 and the second mobile power source 22 are both mobile power banks that are portable and safe. Of course, it is understandable that in other embodiments, the first mobile power source 21 and the second mobile power source 22 may also be other power sources that are portable and safe, which is not limited here.

[0040] In this embodiment, a power switch is provided on the current display 4 , and the second mobile power source 22 is electrically connected to the current display 4 via the power switch.

[0041] It should be noted that the power switch is exposed outside the device body 1 for easy operation by the tester. When the tester turns off the power switch, the electrical connection between the second mobile power supply 22 and the current display 4 is disconnected. At this time, the second mobile power supply 22 cannot supply power to the test circuit through the current display 4. This prevents excessive power consumption of the second mobile power supply 22 when leakage detection is not being performed, thereby ensuring the power of the second mobile power supply 22. When the first mobile power supply 21 is out of power, the tester closes the power switch, reconnecting the electrical connection between the second mobile power supply 22 and the current display 4. At this time, the second mobile power supply 22 can supply power to the test circuit through the current display 4.

[0042] The output voltage of the mobile power supply 2 is 3-7V, and the output current of the mobile power supply 2 is 1-3A.

[0043] In this embodiment, the output voltage of the first mobile power supply 21 and the second mobile power supply 22 are both 3-7V, and the output current of the first mobile power supply 21 and the second mobile power supply 22 are both 1-3A. By selecting the first mobile power supply 21 and the second mobile power supply 22 with lower output voltage and output current, on the one hand, the normal progress of the leakage detection operation can be guaranteed, and on the other hand, the personal safety of the tester can be guaranteed.

[0044] For example, the output voltage of the first mobile power supply 21 and the second mobile power supply 22 are both 5V, and the output current of the first mobile power supply 21 and the second mobile power supply 22 are both 2A; of course, it can be understood that in other embodiments, the output voltage and output current of the mobile power supply 2 can be determined according to the actual working conditions, as long as the normal progress of the leakage detection operation and the personal safety of the testers can be guaranteed.

[0045] In this embodiment, the testing mechanism 5 is a clamp-type testing mechanism, which is used to clamp onto a circuit of an external device to detect leakage current.

[0046] The clamp-type test mechanism can be conveniently clamped on the circuit of the external device, thus having better stability. During the leakage detection process, the tester clamps the clamp-type test mechanism on the circuit of the external device, and then judges whether the leakage current is lower than the reference value based on the magnitude of the leakage current displayed on the current display 4. If the leakage current is lower than the reference value, there is no need to repair the equipment. If the leakage current is higher than the reference value, the equipment needs to be repaired in time.

[0047] In other embodiments, the testing mechanism 5 may also be in other shapes. For example, the testing mechanism 5 may be in a hook shape, as long as the testing mechanism 5 can stably contact the circuit of the external device to facilitate the detection of leakage current.

[0048] Exemplarily, the clamp-type testing mechanism is a magnetoelectric effect current sensing clamp or a Hall effect current sensing clamp.

[0049] It should be noted that the magnetoelectric effect current sensing clamp contains a ring-shaped iron core. When current passes through the encircled wire, a magnetic field is generated. This magnetic field induces eddy currents in the iron core, which in turn generates a voltage proportional to the measured current. The current display 4 converts this voltage into a corresponding current reading and displays it. The magnetoelectric effect current sensing clamp is suitable for rapid on-site detection and maintenance work and is generally used to measure AC current.

[0050] The Hall effect current sensing clamp contains a Hall sensor. When current flows through the conductor, the magnetic field generated passes through the Hall element, generating a Hall voltage in the element. This voltage is proportional to the strength of the magnetic field, which is in turn proportional to the current. Therefore, by measuring the Hall voltage, the current can be indirectly calculated and displayed on the current display 4. The Hall effect current sensing clamp has high accuracy and fast response speed, making it suitable for precise measurement.

[0051] In this embodiment, the leakage detection device further includes a rheostat 6 , which is connected to the test circuit.

[0052] It should be noted that the variable resistor 6 can adjust the resistance and can adjust the current when connected to the circuit. Generally, the variable resistor 6 is composed of a resistance wire with a relatively large resistance and a device that can change the contact point to adjust the effective length of the resistance wire.

[0053] By setting the variable resistor 6 in the test circuit, the detection range of the leakage current is expanded, so that the leakage detection device can detect smaller leakage currents. When the resistance value of the variable resistor 6 is larger, the leakage current that can be detected is smaller. If the leakage current to be detected is 90-1000mA, the resistance value of the variable resistor 6 is adjusted so that the leakage detection device can detect a leakage current of 90-1000mA.

[0054] Exemplarily, the rheostat 6 is a knob rheostat or a sliding rheostat.

[0055] It should be noted that a rheostat, often called a potentiometer or variable resistor, is an electronic component that allows the user to continuously adjust the resistance value by turning a knob. This adjustment is achieved by changing the contact point position of the resistive material, thereby changing the effective resistance length of the connected circuit, thereby affecting the current flow.

[0056] The sliding rheostat is one of the commonly used rheostats. Its working principle is to change the resistance by changing the length of the resistance wire connected to the circuit, thereby gradually changing the current in the circuit.

[0057] In other embodiments, the rheostat 6 is not limited to the aforementioned knob rheostat or sliding rheostat. For example, the rheostat 6 may also be a resistance box. Compared with a sliding rheostat, a sliding rheostat cannot indicate the resistance value of the connected circuit, but can continuously change the resistance in the connected circuit. A resistance box can indicate the resistance value of the connected circuit, but the resistance value changes discontinuously.

[0058] In this embodiment, the maximum resistance of the resistor 6 is less than 10KΩ.

[0059] It should be noted that the reference value for comparison with the leakage current displayed on the current display 4 is generally 300-500mA. If the leakage current displayed on the current display 4 is less than the reference value, it indicates that the equipment is normal and no maintenance is required. When the maximum resistance of the variable resistor 6 is below 10KΩ, the leakage detection device can detect a current less than the reference value, and the leakage detection work can be carried out normally. Therefore, there is no need for a variable resistor 6 with a maximum resistance of more than 10KΩ.

[0060] In this embodiment, the leakage detection device further includes a test switch 7 , which is connected to the test circuit.

[0061] It should be noted that the test switch 7 is exposed outside the device body 1 for easy operation by the tester. The test mechanism 5 is connected to the test circuit via the test switch 7. When the tester opens the test switch 7, the test circuit is disconnected, and the leakage detection device is in a shutdown state, unable to perform leakage detection on external devices. When the tester closes the test switch 7, the test circuit is connected, and the clamp-type test mechanism 5 can be clamped on the circuit of the external device to detect leakage current.

[0062] In this embodiment, the leakage detection device further includes a protection switch 8 , which is connected to the test circuit.

[0063] It should be noted that the protective switch 8 is exposed outside the device body 1 to facilitate operation by the tester. When the tester disconnects the protective switch 8 and the test switch 7, the test circuit is disconnected, and the leakage detection device is now in the off state, unable to perform leakage detection on the external device. When the tester disconnects the protective switch 8 and opens the test switch 7, the test circuit is disconnected, and the leakage detection device is also in the off state, unable to perform leakage detection on the external device. When the tester closes the test switch 7 and the protective switch 8 at the same time, the test circuit is connected, and the clamp test mechanism 5 can be clamped on the circuit of the external device to detect leakage current.

[0064] By setting the test switch 7 and the protection switch 8 in the test circuit at the same time, the test switch 7 and the protection switch 8 play a dual protection role. Only when the test switch 7 and the protection switch 8 are closed at the same time can leakage detection be performed. If the protection switch 8 is disconnected, the test circuit will not be connected even if the test switch 7 is accidentally touched and the test switch 7 is closed, thereby ensuring the safety of the tester.

[0065] In this embodiment, the device body 1 is made of PVC.

[0066] It should be noted that PVC, namely polyvinyl chloride, is a synthetic polymer plastic, which is available in two types: hard and soft. The device body 1 can be made of hard PVC material, which has the advantages of being easy to carry and preventing electric shock.

[0067] It is understandable that, in other embodiments, the device body 1 may also be made of TPE material or TPU material, wherein TPE is also called artificial rubber or synthetic rubber, and TPU is also called thermoplastic polyurethane rubber.

[0068] The leakage detection device provided in the present embodiment operates as follows: During leakage detection of an external device, a first mobile power supply 21 supplies power to a test circuit via an inverter 3. Inverter 3 converts the DC power of the first mobile power supply 21 into AC power. When the first mobile power supply 21 is depleted, a second mobile power supply 22 is activated to supply power to the test circuit via a current display 4. The clamp-type test mechanism is clamped onto the circuit of the external device. If the external device has leakage, the current display 4 displays the magnitude of the leakage current. The tester determines whether the leakage current exceeds a reference value based on the displayed leakage current. If the leakage current is below the reference value, no device repair is required. If the leakage current is above the reference value, prompt repair is required, thereby effectively preventing fires in data centers. Furthermore, since the output voltages of the first and second mobile power supplies 21 and 22 are relatively low, the device is safer than testing by plugging a wire into a 220V AC circuit, thus ensuring the personal safety of the tester.

[0069] The technical effects of the leakage detection device provided in the embodiment of the present application include at least: the output voltage and output current of the mobile power supply 2 are small, the mobile power supply 2 is portable and safe, and can also better ensure the personal safety of the tester; by setting the variable resistor 6 in the test loop, the detection range of the leakage current is expanded, so that the leakage detection device can detect smaller leakage currents; the current display 4 can directly display the magnitude of the leakage current, which is convenient for the tester to observe and judge whether the equipment is working normally; the use of a clamp-type test mechanism to clamp on the line of the external device can effectively increase the safety distance and ensure personal safety; the leakage detection device is easy to carry, and only one tester is needed to complete the detection. Each electric well detection only takes about half an hour, and the detection time is greatly shortened.

[0070] In summary, the embodiment of the present application provides a leakage detection device. During the leakage detection of an external device, the clamp-type test mechanism is clamped to the circuit of the external device, and the current display 4 displays the magnitude of the leakage current, so that the leaking device can be discovered in time so that the leaking device can be repaired in time, thereby effectively avoiding the occurrence of fire in the data center. Moreover, since a mobile power supply 2 with a smaller output voltage is used to power the test circuit, it is safer than the detection method of directly connecting the wires to the 220V AC circuit, thereby ensuring the personal safety of the test personnel.

[0071] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A leakage detection device, characterized in that: The device comprises a device body, a mobile power supply, an inverter, a current display, and a testing mechanism. The inverter and the current display are both arranged on the device body. The mobile power supply is electrically connected to the inverter and / or the current display. A test loop is formed between the inverter, the current display, and the testing mechanism. The testing mechanism is used to contact the circuit of an external device to detect leakage current. The output voltage of the mobile power supply is less than 36V.

2. The leakage detection device according to claim 1, characterized in that: The mobile power supply includes a first mobile power supply and a second mobile power supply. The first mobile power supply is electrically connected to the inverter, and the second mobile power supply is electrically connected to the current display.

3. The leakage detection device according to claim 2, characterized in that: The current display is provided with a power switch, and the second mobile power supply is electrically connected to the current display via the power switch.

4. The leakage detection device according to claim 1, characterized in that: The output voltage of the mobile power supply is 3-7V, and the output current of the mobile power supply is 1-3A.

5. The leakage detection device according to claim 1, characterized in that: The testing mechanism is a clamp-type testing mechanism, which is used to clamp on the circuit of the external device to detect leakage current.

6. The leakage detection device according to claim 5, characterized in that: The clamp-shaped testing mechanism is a magnetoelectric effect current sensing clamp or a Hall effect current sensing clamp.

7. The leakage detection device according to claim 1, characterized in that: The leakage detection device further includes a variable resistor, which is connected to the test circuit.

8. The leakage detection device according to claim 7, characterized in that: The rheostat is a knob rheostat or a sliding rheostat.

9. The leakage detection device according to claim 7, characterized in that: The maximum resistance of the variable resistor is less than 10KΩ.

10. The leakage detection device according to claim 1, characterized in that: The leakage detection device further includes a test switch connected to the test circuit.

11. The leakage detection device according to claim 10, characterized in that: The leakage detection device further includes a protection switch connected to the test circuit.

12. The leakage detection device according to claim 1, characterized in that: The device body is made of PVC material.

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