Anti-freezing device and method for insulation resistance meter

Abstract

The invention provides an anti-freezing device and method for an insulation resistance meter, and the device comprises a resistance meter temperature sensor, a control unit, and a heating unit. Wherein the resistance meter temperature sensor is used for monitoring the real-time temperature of the insulation resistance meter and sending the real-time temperature to the control unit; the control unit is used for generating a control instruction according to the real-time temperature of the insulation resistance meter and sending the control instruction to the heating unit; the heating units are distributed on the outer surfaces of the shell and the connecting line of the insulation resistance meter and used for heating the shell and the connecting line of the insulation resistance meter according to the control instruction. According to the invention, the normal work of the insulation resistance meter in a low-temperature environment is ensured, and the detection efficiency and the equipment safety are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical equipment detection and protection, and in particular relates to an antifreeze device and method for an insulation resistance meter. Background Art

[0002] Insulation resistance meter is an important testing tool commonly used in power systems, industrial production lines and scientific research experiments. It is used to measure the insulation resistance value of electrical equipment or lines to evaluate their insulation performance. However, in cold areas or severe winter conditions, the insulation resistance meter and its connecting lines are easily affected by low temperatures and freeze, resulting in inaccurate measurements or even equipment damage, which seriously affects the progress of testing. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide an antifreeze device and method for an insulation resistance meter to ensure the normal operation of the insulation resistance meter in a low temperature environment and to improve the detection efficiency and the safety of the equipment.

[0004] The technical solution adopted by the present invention is: an antifreeze device for an insulation resistance meter, comprising a resistance meter temperature sensor, a control unit and a heating unit;

[0005] The resistance meter temperature sensor is used to monitor the real-time temperature of the insulation resistance meter and send it to the control unit;

[0006] The control unit is used to generate a control instruction according to the real-time temperature of the insulation resistance meter and send it to the heating unit;

[0007] The heating units are distributed on the outer surface of the shell and the connecting line of the insulation resistance meter, and are used for heating the shell and the connecting line of the insulation resistance meter according to the control instruction.

[0008] The above technical solution also includes a heat preservation unit, which covers the outside of the heating unit and is wrapped around the outside of the insulation resistance meter and its connecting lines.

[0009] In the above technical solution, a drainage pipe is arranged inside the insulation resistance meter; the drainage pipe is used to connect the water accumulation part of the insulation resistance meter with the outside of the insulation resistance meter; one end of the drainage pipe used for the water accumulation part of the insulation resistance meter is higher than the end used for connecting to the outside of the insulation resistance meter.

[0010] The above technical solution also includes an ambient temperature sensor; the ambient temperature sensor is used to monitor the ambient temperature outside the insulation resistance meter in real time; a control valve is provided on the drainage pipe; the control unit is used to generate a control instruction according to the ambient temperature outside the insulation resistance meter and send it to the control valve; the control valve is used to control the drainage pipe to be opened and closed according to the control instruction.

[0011] In the above technical solution, a humidity sensor is arranged in the drainage pipe, which is used to monitor the humidity in the drainage pipe and send it to the control unit; the control unit is used to generate a control instruction according to the humidity in the drainage pipe and send it to the control valve; the control valve is used to control the opening and closing of the drainage pipe according to the control instruction.

[0012] In the above technical solution, a water reservoir is arranged inside the insulation resistance meter; all drainage pipes are connected to the water inlet of the water reservoir; the water outlet of the water reservoir is connected to the outside of the insulation resistance meter; and the control valve is arranged at the water outlet of the water reservoir.

[0013] In the above technical solution, the drainage pipe is arranged in the drainage layer inside the insulation resistance meter; the drainage layer is the space between the inner bottom surface and the outer bottom surface of the insulation resistance meter.

[0014] In the above technical solution, when the control unit determines that the real-time temperature of the insulation resistance meter is less than the first set value, it sends a control instruction to start the heating unit; when the control unit determines that the real-time temperature of the insulation resistance meter is greater than the second set value, it sends a control instruction to turn off the heating unit.

[0015] The above technical solution also includes a current sensor for real-time monitoring of the working current of the insulation resistance meter and sending it to the control unit; when the control unit determines that the real-time current of the insulation resistance meter is greater than the safety threshold, it sends a control instruction to shut down the heating unit.

[0016] In the above technical solution, the heating unit is made of PTC thermistor material.

[0017] In the above technical solution, when the control unit determines that the ambient temperature outside the insulation resistance meter is less than the third set value or determines that the humidity in the drainage pipe is greater than the fourth set value, it sends a control instruction to the control valve to open the drainage pipe; when the control unit determines that the humidity of the insulation resistance meter is less than the fifth set value, it sends a control instruction to the control valve to close the drainage pipe.

[0018] The above technical solution also includes a remote monitoring unit, which is wirelessly connected to the control unit; the remote monitoring unit is used to receive and display the temperature and humidity of the insulation resistance meter, the external ambient temperature of the insulation resistance meter and the control instructions sent by the control unit in real time.

[0019] In the above technical solution, the remote monitoring unit performs an alarm operation after determining that the real-time temperature and humidity of the insulation resistance meter are lower than the corresponding set thresholds.

[0020] The present invention also provides an antifreeze method for an insulation resistance meter, comprising the following steps:

[0021] The resistance meter temperature sensor monitors the real-time temperature of the insulation resistance meter and sends it to the control unit;

[0022] The control unit generates a control instruction according to the real-time temperature of the insulation resistance meter and sends it to the heating unit;

[0023] The heating units are distributed on the outer surface of the shell and the connecting line of the insulation resistance meter, and heat the shell and the connecting line of the insulation resistance meter according to the control instruction.

[0024] The above technical solution also includes the following steps: insulating the insulation resistance meter by means of a heat preservation unit which covers the outside of the heating unit and wraps around the outside of the insulation resistance meter and its connecting lines.

[0025] In the above technical solution, a drainage pipe is arranged inside the insulation resistance meter; the drainage pipe is used to connect the water accumulation part of the insulation resistance meter with the outside of the insulation resistance meter; one end of the drainage pipe used for the water accumulation part of the insulation resistance meter is higher than the end used for connecting to the outside of the insulation resistance meter.

[0026] The above technical solution also includes the following steps: the ambient temperature sensor monitors the ambient temperature outside the insulation resistance meter in real time; a control valve is provided on the drainage pipe; the control unit generates a control instruction according to the ambient temperature outside the insulation resistance meter and sends it to the control valve; the control valve controls the drainage pipe to be opened and closed according to the control instruction.

[0027] In the above technical solution, a water reservoir is arranged inside the insulation resistance meter; all drainage pipes are connected to the water inlet of the water reservoir; the water outlet of the water reservoir is connected to the outside of the insulation resistance meter; and the control valve is arranged at the water outlet of the water reservoir.

[0028] In the above technical solution, the drainage pipe is arranged in the drainage layer inside the insulation resistance meter; the drainage layer is the space between the inner bottom surface and the outer bottom surface of the insulation resistance meter.

[0029] The above technical solution also includes the following steps: the humidity sensor monitors the humidity in the drainage pipe in real time and sends it to the control unit; the control unit generates a control instruction based on the humidity in the drainage pipe and sends it to the control valve; the control valve is used to control the drainage pipe to be open and closed according to the control instruction.

[0030] The above technical solution also includes the following steps: when the control unit determines that the real-time temperature of the insulation resistance meter is less than the first set value, the control unit sends a control instruction to start the heating unit; when the control unit determines that the real-time temperature of the insulation resistance meter is greater than the second set value, the control unit sends a control instruction to turn off the heating unit.

[0031] The above technical solution also includes the following steps: the current sensor monitors the working current of the insulation resistance meter in real time and sends it to the control unit; when the control unit determines that the real-time current of the insulation resistance meter is greater than the safety threshold, it sends a control instruction to shut down the heating unit.

[0032] The above technical solution also includes the following steps: when the control unit determines that the ambient temperature outside the insulation resistance meter is less than the third set value or determines that the humidity in the drainage pipe is greater than the fourth set value, it sends a control instruction to the control valve to open the drainage pipe; when the control unit determines that the humidity of the insulation resistance meter is less than the fifth set value, it sends a control instruction to the control valve to close the drainage pipe.

[0033] The above technical solution also includes the following steps: the remote monitoring unit receives and displays the temperature and humidity of the insulation resistance meter, the external environment temperature of the insulation resistance meter and the control instructions sent by the control unit in real time.

[0034] The above technical solution also includes the following steps: the remote monitoring unit performs an alarm operation after determining that the real-time temperature and humidity of the insulation resistance meter are lower than the corresponding set thresholds.

[0035] The beneficial effects of the present invention are as follows: the present invention monitors the temperature information of the insulation resistance meter in real time through the intelligent antifreeze function, and heats the insulation resistance meter in a low-temperature environment, thereby ensuring that the insulation resistance meter works normally in a low-temperature environment, avoiding inaccurate measurements or equipment damage caused by icing, thereby improving detection efficiency, and can be widely used in insulation performance detection of electrical equipment in cold areas and under severe winter conditions.

[0036] Furthermore, the present invention effectively ensures the body temperature of the insulation resistance meter in a low-temperature environment by means of a heat preservation unit disposed outside the insulation resistance meter, thereby further ensuring the safety of the insulation resistance meter.

[0037] Furthermore, the present invention provides a drainage pipe inside the insulation resistance meter to effectively prevent water from accumulating and freezing inside the insulation resistance meter, thereby further ensuring the safety of the insulation resistance meter.

[0038] Furthermore, the present invention controls the control valve on the drainage pipe through the ambient temperature and humidity of the insulation resistance meter to ensure the automation of the drainage function, so as to improve the working efficiency of the drainage function of the antifreeze device.

[0039] Furthermore, the present invention gathers the accumulated water collected by the drainage pipe into a water reservoir, which can improve the efficiency of draining the accumulated water. The drainage pipe is arranged in the drainage layer inside the insulation resistance meter; the drainage layer is the space between the inner bottom surface and the outer bottom surface of the insulation resistance meter, which effectively realizes the isolation between the accumulated water and the internal components of the insulation resistance meter.

[0040] Furthermore, the present invention realizes automation of the heating function by setting the temperature threshold of the insulation resistance meter, so as to improve the working efficiency of the heating function of the antifreeze device.

[0041] Furthermore, when the insulation resistance meter is over-heated or over-current occurs, the control unit of the present invention automatically terminates the heating operation of the heating unit, thereby effectively ensuring the safety of the insulation resistance meter.

[0042] Furthermore, the present invention realizes automatic closing of the drainage pipe by setting the ambient temperature and humidity threshold of the drainage pipe, thereby ensuring effective drainage while preventing foreign debris from entering due to the long-term connection between the insulation resistance meter and the outside world.

[0043] Furthermore, the present invention realizes remote viewing of temperature data, heating status, drainage status and remote control of heating and drainage operations through a remote monitoring unit; the platform also has an alarm function, which can promptly notify the user when the temperature is lower than the set threshold or the system fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a system schematic diagram of the present invention;

[0045] Figure 2 It is a structural schematic diagram of the present invention;

[0046] Among them, 1-insulation resistance meter, 2-heating unit, 3-insulation unit, 4-drainage pipe, 5-water reservoir, 6-control valve, 7-drainage layer, 8-connecting line, 9-water accumulation area. DETAILED DESCRIPTION

[0047] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not constitute a limitation on the present invention.

[0048] Example 1

[0049] like Figure 1 As shown, the present invention provides an antifreeze device for an insulating resistance meter, comprising a resistance meter temperature sensor, a control unit and a heating unit 2;

[0050] Wherein, the resistance meter temperature sensor is used to monitor the real-time temperature of the insulation resistance meter 1 and send it to the control unit;

[0051] The control unit is used to generate a control instruction according to the real-time temperature of the insulation resistance meter 1 and send it to the heating unit 2;

[0052] The heating units 2 are distributed on the outer surface of the housing and the connecting line 8 of the insulation resistance meter 1 , and are used to heat the housing and the connecting line 8 of the insulation resistance meter 1 according to control instructions.

[0053] Specifically, the main body of the insulation resistance meter 1 adopts a standard structural design, including conventional components such as a measuring circuit, a display screen, and buttons. The measuring circuit is responsible for receiving external signals and measuring insulation resistance; the display screen is used to display the measurement results; and the buttons are used to receive user input, such as selecting a measurement mode, setting parameters, etc. The connecting line 8 is located inside the insulation resistance meter 1. The heating unit 2 is coated on the outer surface of the insulation resistance meter 1 and the outer surface of the connecting line 8 inside it.

[0054] The temperature sensor is installed at key positions of the housing and the connection line 8 of the insulation resistance meter 1, such as interfaces, cable trenches and other areas that are prone to water accumulation or temperature influence, so as to ensure that the temperature sensor can accurately sense the temperature change in the actual working environment of the insulation resistance meter 1. When the temperature sensor senses the temperature change, its internal resistance value or output voltage will change, and the above change is transmitted to the control unit.

[0055] Specifically, the heating unit 2 is made of PTC thermistor material. The heating unit 2 is evenly distributed around the housing of the insulation resistance meter 1 and the connecting line 8, and is made of PTC thermistor material with low resistivity and high thermal conductivity. The above material can quickly generate a large amount of heat at a low voltage, and can evenly distribute the heat to ensure the heating effect.

[0056] Specifically, it also includes a heat preservation unit 3, which covers the outside of the heating unit 2 and is wrapped around the outside of the insulation resistance meter 1 and its connecting line 8. The heating unit 2 starts to work, generates heat and transfers it to the insulation resistance meter 1 and its connecting line 8. At the same time, the heat preservation unit 3 locks the heat inside the device to reduce heat loss. In this way, the heating unit 2 and the heat preservation unit 3 can maintain the temperature of the insulation resistance meter 1 in a low temperature environment, prevent ice formation and maintain the normal working state of the device.

[0057] Preferably, the heat preservation unit 3 is made of environmentally friendly and durable heat preservation material, has good heat preservation performance and fireproof performance, and can maintain the heat preservation effect of the equipment for a long time.

[0058] Specifically, a drainage pipe 4 is provided inside the insulation resistance meter 1; the drainage pipe 4 is used to connect the water accumulation part 9 of the insulation resistance meter 1 with the outside of the insulation resistance meter 1; one end of the drainage pipe 4 used for the water accumulation part 9 of the insulation resistance meter 1 is higher than the end used for connecting to the outside of the insulation resistance meter 1. The drainage pipe 4 uses micro-drainage holes, which are provided at the water accumulation part 9 of the insulation resistance meter 1, such as the interface, the cable trench, etc. The diameter of the drainage hole is moderate to ensure effective drainage and prevent external debris from entering.

[0059] Preferably, the drainage pipe 4 is made of corrosion-resistant and low-temperature-resistant materials, and can work stably in harsh environments to ensure the reliability of the drainage function.

[0060] Specifically, it also includes an ambient temperature sensor; the ambient temperature sensor is used to monitor the ambient temperature outside the insulation resistance meter 1 in real time; a control valve 6 is provided on the drainage pipe 4; the control unit is used to generate a control instruction according to the ambient temperature outside the insulation resistance meter 1 and send it to the control valve 6; the control valve 6 is used to control the drainage pipe 4 to be opened and closed according to the control instruction.

[0061] Preferably, the control valve 6 selects a solenoid valve, which can be opened and closed according to the instructions of the control circuit, controls the on-off of the drainage hole, and realizes the automatic drainage function. When it is detected that the temperature of the surrounding area of ​​the insulation resistance meter 1 is lower than the preset antifreeze threshold, the control unit will start the control valve 6, allowing the accumulated water to flow out of the insulation resistance meter 1 through the micro drainage hole.

[0062] Specifically, a water reservoir 5 is provided inside the insulation resistance meter 1; all drainage pipes 4 are connected through the water inlet of the water reservoir 5; the water outlet of the water reservoir 5 is connected to the outside of the insulation resistance meter 1; and the control valve 6 is provided at the water outlet of the water reservoir 5. The present invention collects the accumulated water collected by the drainage pipe 4 into the water reservoir 5, which can improve the efficiency of draining the accumulated water. The drainage pipe 4 is provided in the drainage layer 7 inside the insulation resistance meter 1; the drainage layer 7 is the space between the inner bottom surface and the outer bottom surface of the insulation resistance meter 1, which effectively realizes the isolation between the accumulated water and the internal components of the insulation resistance meter 1.

[0063] Specifically, a humidity sensor is provided in the drainage pipe 4 to monitor the humidity in the drainage pipe 4 and send it to the control unit; the control unit is used to generate a control instruction according to the humidity in the drainage pipe 4 and send it to the control valve 6; the control valve 6 is used to control the on and off of the drainage pipe 4 according to the control instruction. When the control unit determines that the humidity in the drainage pipe 4 detected by the humidity sensor is greater than the set threshold, it determines that there is water accumulation in the drainage pipe 4, and the control unit will start the control valve 6 to allow the accumulated water to flow out of the insulation resistance meter 1 through the micro-drain hole.

[0064] Preferably, when the control unit determines that the ambient temperature outside the insulation resistance meter 1 is less than the third set value or determines that the humidity in the drainage pipe 4 is greater than the fourth set value, it sends a control instruction to the control valve 6 to open the drainage pipe 4; when the control unit determines that the humidity of the insulation resistance meter 1 is less than the fifth set value, the control unit determines that the accumulated water in the drainage pipe 4 has been drained, and sends a control instruction to the control valve 6 to close the drainage pipe 4 to prevent external debris from entering the interior of the equipment.

[0065] Specifically, when the control unit determines that the real-time temperature of the insulation resistance meter 1 is less than the first set value, the control unit sends a control instruction to start the heating unit 2 to ensure the automation of the start of the heating unit 2; when the control unit determines that the real-time temperature of the insulation resistance meter 1 is greater than the second set value, the control unit sends a control instruction to shut down the heating unit 2 to ensure that the insulation resistance meter 1 will not cause an over-temperature failure due to the heating unit 2.

[0066] Specifically, it also includes a current sensor for monitoring the working current of the insulation resistance meter 1 in real time and sending it to the control unit; when the control unit determines that the real-time current of the insulation resistance meter 1 is greater than the safety threshold, it sends a control instruction to shut down the heating unit 2 to prevent damage to the equipment or safety accidents caused by excessive current during the heating process.

[0067] Specifically, it also includes a remote monitoring unit, which is wirelessly connected to the control unit; the remote monitoring unit is used to receive and display the temperature and humidity of the insulation resistance meter 1, the external environment temperature of the insulation resistance meter 1, and the control instructions sent by the control unit in real time. The remote monitoring unit performs an alarm operation after determining that the real-time temperature and humidity of the insulation resistance meter 1 are lower than the corresponding set thresholds.

[0068] Preferably, the remote monitoring unit is wirelessly connected to the control units of the multiple insulation resistance meters 1 respectively, so as to centrally monitor and manage the status and operation of the multiple insulation resistance meters 1, thereby improving management efficiency and convenience. The remote monitoring and control units communicate with each other using a standardized remote control protocol to realize cross-platform and cross-device remote monitoring and operation functions.

[0069] The remote monitoring unit provides a graphical interface, which is connected to the control unit of the insulation resistance meter 1 through a wireless network, so as to realize remote viewing of temperature data, heating status, drainage status and remote control of heating and drainage operations; the platform also has an alarm function, which can promptly notify the user when the temperature is lower than the set threshold or the system fails.

[0070] The remote monitoring unit allows users to remotely access and control the insulation resistance meter 1 through the network, realizing real-time monitoring and remote operation of the equipment status. It is mainly composed of two parts: hardware equipment and software system. Hardware equipment: including network communication module, data processing unit, etc., used to realize data transmission and communication between the device and the network. The network communication module supports wired or wireless connection methods, such as Ethernet, Wi-Fi, 4G / 5G, etc., to ensure that the device can stably access the Internet. The software system is installed on the cloud platform and is responsible for receiving data from the insulation resistance meter 1, performing data processing and analysis, and providing a user interaction interface. The software system includes data acquisition module, data storage module, data processing and analysis module, user interaction interface and other parts.

[0071] Through the remote monitoring unit, users can view various parameters and status information of the insulation resistance meter 1 in real time, such as temperature, humidity, insulation resistance value, etc. The platform can update data in real time and display it to users in the form of charts, curves, etc., so that users can quickly understand the status of the equipment.

[0072] The user can remotely start the heating and insulation unit 3, open the drain valve, etc. through the remote monitoring unit. The remote operation function supports multiple operation modes, such as button clicking, sliding bar adjustment, etc., to ensure that the user can operate conveniently.

[0073] The remote monitoring unit can process and analyze the received data and determine whether the equipment is operating normally according to the preset thresholds and rules. Once an abnormal situation is found (such as low temperature, abnormal insulation resistance value, etc.), the platform will immediately issue an alarm message to remind the user to deal with it in time.

[0074] The remote monitoring unit can store a large amount of historical data and provide data query function. Users can query data records within a specific time period as needed for subsequent data analysis and processing.

[0075] The remote monitoring unit supports multi-user login and permission management functions to ensure that different users can access different data and functions. The user management function can also realize operations such as adding, deleting, and modifying user information, making it convenient for administrators to manage users.

[0076] Example 2

[0077] The present invention also provides an antifreeze method for an insulation resistance meter 1, comprising the following steps:

[0078] The resistance meter temperature sensor monitors the real-time temperature of the insulation resistance meter 1 and sends it to the control unit;

[0079] The control unit generates a control instruction according to the real-time temperature of the insulation resistance meter 1 and sends it to the heating unit 2;

[0080] The heating units 2 are distributed on the outer surface of the housing and the connecting line 8 of the insulation resistance meter 1 , and heat the housing and the connecting line 8 of the insulation resistance meter 1 according to the control instruction.

[0081] Specifically, the method further includes the following steps: the insulation resistance meter 1 is insulated by the insulation unit 3 which covers the outside of the heating unit 2 and wraps around the outside of the insulation resistance meter 1 and its connecting line 8 .

[0082] Specifically, a drainage pipe 4 is provided inside the insulation resistance meter 1; the drainage pipe 4 is used to connect the water accumulation part 9 of the insulation resistance meter 1 with the outside of the insulation resistance meter 1; one end of the drainage pipe 4 used for the water accumulation part 9 of the insulation resistance meter 1 is higher than the end used for connecting to the outside of the insulation resistance meter 1.

[0083] Specifically, the following steps are also included: the ambient temperature sensor monitors the ambient temperature outside the insulation resistance meter 1 in real time; a control valve 6 is provided on the drainage pipe 4; the control unit generates a control instruction according to the ambient temperature outside the insulation resistance meter 1 and sends it to the control valve 6; the control valve 6 controls the drainage pipe 4 to be opened and closed according to the control instruction.

[0084] Specifically, the following steps are also included: the humidity sensor monitors the humidity in the drainage pipe 4 in real time and sends it to the control unit; the control unit generates a control instruction according to the humidity in the drainage pipe 4 and sends it to the control valve 6; the control valve 6 is used to control the drainage pipe 4 to be open or closed according to the control instruction.

[0085] Specifically, the following steps are also included: when the control unit determines that the real-time temperature of the insulation resistance meter 1 is less than the first set value, the control unit sends a control instruction to start the heating unit 2; when the control unit determines that the real-time temperature of the insulation resistance meter 1 is greater than the second set value, the control unit sends a control instruction to turn off the heating unit 2.

[0086] Specifically, the following steps are also included: the current sensor monitors the working current of the insulation resistance meter 1 in real time and sends it to the control unit; when the control unit determines that the real-time current of the insulation resistance meter 1 is greater than the safety threshold, it sends a control instruction to shut down the heating unit 2.

[0087] Specifically, the following steps are also included: when the control unit determines that the ambient temperature outside the insulation resistance meter 1 is less than the third set value or determines that the humidity in the drainage pipe 4 is greater than the fourth set value, the control unit sends a control instruction to the control valve 6 to open the drainage pipe 4; when the control unit determines that the humidity of the insulation resistance meter 1 is less than the fifth set value, the control unit sends a control instruction to the control valve 6 to close the drainage pipe 4.

[0088] Specifically, the method further includes the following steps: the remote monitoring unit receives and displays the temperature and humidity of the insulation resistance meter 1 , the external environment temperature of the insulation resistance meter 1 , and the control instructions sent by the control unit in real time.

[0089] Specifically, the method further includes the following steps: the remote monitoring unit performs an alarm operation after determining that the real-time temperature and humidity of the insulation resistance meter 1 are lower than corresponding set thresholds.

[0090] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0091] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0092] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0093] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0094] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

[0095] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. An antifreeze device for an insulation resistance meter, characterized in that: It includes a resistance meter temperature sensor, a control unit and a heating unit; The resistance meter temperature sensor is used to monitor the real-time temperature of the insulation resistance meter and send it to the control unit; The control unit is used to generate a control instruction according to the real-time temperature of the insulation resistance meter and send it to the heating unit; The heating units are distributed on the outer surface of the shell and the connecting line of the insulation resistance meter, and are used for heating the shell and the connecting line of the insulation resistance meter according to the control instruction.

2. The antifreeze device of an insulation resistance meter according to claim 1, characterized in that: It also includes a heat preservation unit, which covers the outside of the heating unit and is wrapped around the outside of the insulation resistance meter and its connecting lines.

3. The antifreeze device of an insulation resistance meter according to claim 1, characterized in that: A drainage pipe is arranged inside the insulation resistance meter; the drainage pipe is used to connect the water accumulation part inside the insulation resistance meter with the outside of the insulation resistance meter; one end of the drainage pipe used for the water accumulation part of the insulation resistance meter is higher than the other end used for connecting to the outside of the insulation resistance meter.

4. The antifreeze device of the insulation resistance meter according to claim 3, characterized in that: It also includes an ambient temperature sensor; the ambient temperature sensor is used to monitor the ambient temperature outside the insulation resistance meter in real time; a control valve is provided on the drainage pipe; the control unit is used to generate a control instruction according to the ambient temperature outside the insulation resistance meter and send it to the control valve; the control valve is used to control the opening and closing of the drainage pipe according to the control instruction.

5. The antifreeze device of the insulation resistance meter according to claim 4, characterized in that: A water reservoir is arranged inside the insulation resistance meter; all drainage pipes are connected with the water inlet of the water reservoir; the water outlet of the water reservoir is connected with the outside of the insulation resistance meter; and the control valve is arranged at the water outlet of the water reservoir.

6. The antifreeze device of the insulation resistance meter according to claim 5, characterized in that: The drainage pipe is arranged in the drainage layer inside the insulation resistance meter; the drainage layer is the space between the inner bottom surface and the outer bottom surface of the insulation resistance meter.

7. The antifreeze device of an insulation resistance meter according to claim 4, characterized in that: A humidity sensor is provided in the drainage pipe for monitoring the humidity in the drainage pipe and sending the humidity to the control unit; the control unit is used to generate a control instruction according to the humidity in the drainage pipe and send the control instruction to the control valve; the control valve is used to control the opening and closing of the drainage pipe according to the control instruction.

8. The antifreeze device of an insulation resistance meter according to claim 1, characterized in that: When the control unit determines that the real-time temperature of the insulation resistance meter is less than the first set value, the control unit sends a control instruction to start the heating unit; when the control unit determines that the real-time temperature of the insulation resistance meter is greater than the second set value, the control unit sends a control instruction to turn off the heating unit.

9. The antifreeze device of the insulation resistance meter according to claim 7, characterized in that: It also includes a current sensor for real-time monitoring of the working current of the insulation resistance meter and sending it to the control unit; when the control unit determines that the real-time current of the insulation resistance meter is greater than the safety threshold, it sends a control instruction to shut down the heating unit.

10. The antifreeze device of the insulation resistance meter according to claim 1, characterized in that: The heating unit is made of PTC thermistor material.

11. The antifreeze device of the insulation resistance meter according to claim 6, characterized in that: When the control unit determines that the ambient temperature outside the insulation resistance meter is less than the third set value or that the humidity in the drainage pipe is greater than the fourth set value, the control unit sends a control instruction to the control valve to open the drainage pipe; when the control unit determines that the humidity of the insulation resistance meter is less than the fifth set value, the control unit sends a control instruction to the control valve to close the drainage pipe.

12. The antifreeze device of the insulation resistance meter according to claim 6, characterized in that: It also includes a remote monitoring unit, which is wirelessly connected to the control unit; the remote monitoring unit is used to receive and display the temperature and humidity of the insulation resistance meter, the external environment temperature of the insulation resistance meter and the control instructions sent by the control unit in real time.

13. The antifreeze device of the insulation resistance meter according to claim 6, characterized in that: The remote monitoring unit performs an alarm operation after determining that the real-time temperature and humidity of the insulation resistance meter are lower than the corresponding set thresholds.

14. A method for preventing freezing of an insulation resistance meter, characterized in that: The following steps are involved: The resistance meter temperature sensor monitors the real-time temperature of the insulation resistance meter and sends it to the control unit; The control unit generates a control instruction according to the real-time temperature of the insulation resistance meter and sends it to the heating unit; The heating units are distributed on the outer surface of the shell and the connecting line of the insulation resistance meter, and heat the shell and the connecting line of the insulation resistance meter according to the control instruction.

15. The antifreeze method of the insulation resistance meter according to claim 14, characterized in that: The following steps are also included: The insulation resistance meter is insulated by a heat preservation unit which covers the outside of the heating unit and wraps around the outside of the insulation resistance meter and its connecting lines.

16. The antifreeze method for an insulation resistance meter according to claim 14, characterized in that: A drainage pipe is arranged inside the insulation resistance meter; the drainage pipe is used to connect the water accumulation part of the insulation resistance meter with the outside of the insulation resistance meter; one end of the drainage pipe used for the water accumulation part of the insulation resistance meter is higher than the other end used for connecting to the outside of the insulation resistance meter.

17. The antifreeze method of an insulation resistance meter according to claim 14, characterized in that: The following steps are also included: The ambient temperature sensor monitors the ambient temperature outside the insulation resistance meter in real time; a control valve is provided on the drainage pipe; the control unit generates a control instruction according to the ambient temperature outside the insulation resistance meter and sends it to the control valve; the control valve controls the on and off of the drainage pipe according to the control instruction.

18. The antifreeze method of an insulation resistance meter according to claim 17, characterized in that: A water reservoir is arranged inside the insulation resistance meter; all drainage pipes are connected with the water inlet of the water reservoir; the water outlet of the water reservoir is connected with the outside of the insulation resistance meter; and the control valve is arranged at the water outlet of the water reservoir.

19. A method for antifreezing an insulation resistance meter according to claim 1 / 8, characterized in that: The drainage pipe is arranged in the drainage layer inside the insulation resistance meter; the drainage layer is the space between the inner bottom surface and the outer bottom surface of the insulation resistance meter.

20. The antifreeze method of an insulation resistance meter according to claim 14, characterized in that: It also includes the following steps: the humidity sensor monitors the humidity in the drainage pipe in real time and sends it to the control unit; the control unit generates a control instruction according to the humidity in the drainage pipe and sends it to the control valve; the control valve is used to control the drainage pipe to be open and closed according to the control instruction.

21. The antifreeze method of an insulation resistance meter according to claim 14, characterized in that: The following steps are also included: When the control unit determines that the real-time temperature of the insulation resistance meter is less than the first set value, the control unit sends a control instruction to start the heating unit; when the control unit determines that the real-time temperature of the insulation resistance meter is greater than the second set value, the control unit sends a control instruction to turn off the heating unit.

22. The antifreeze method of an insulation resistance meter according to claim 21, characterized in that: The following steps are also included: The current sensor monitors the working current of the insulation resistance meter in real time and sends it to the control unit; when the control unit determines that the real-time current of the insulation resistance meter is greater than the safety threshold, it sends a control instruction to shut down the heating unit.

23. The antifreeze method of an insulation resistance meter according to claim 20, characterized in that: The following steps are also included: When the control unit determines that the ambient temperature outside the insulation resistance meter is less than the third set value or that the humidity in the drainage pipe is greater than the fourth set value, the control unit sends a control instruction to the control valve to open the drainage pipe; when the control unit determines that the humidity of the insulation resistance meter is less than the fifth set value, the control unit sends a control instruction to the control valve to close the drainage pipe.

24. The antifreeze method of an insulation resistance meter according to claim 20, characterized in that: The following steps are also included: The remote monitoring unit receives and displays the temperature and humidity of the insulation resistance meter, the external environment temperature of the insulation resistance meter and the control instructions sent by the control unit in real time.

25. The antifreeze method of an insulation resistance meter according to claim 24, characterized in that: The following steps are also included: The remote monitoring unit performs an alarm operation after determining that the real-time temperature and humidity of the insulation resistance meter are lower than the corresponding set thresholds.

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