A low voltage apparatus temperature monitoring device

Abstract

The utility model discloses a low -voltage equipment temperature monitoring devices, including the casing, and set up in the temperature monitor of casing inside, the casing has including the anti - electromagnetic interference subassembly and the outer casing from inside to outside, the temperature monitor includes controller, temperature monitoring module, temperature early warning module, temperature regulation module and communication module, temperature monitoring module, temperature early warning module, temperature regulation module and communication module are electrically connected in proper order to the controller, temperature monitoring module includes infrared temperature monitoring probe, sets up in the temperature acquisition hole of casing front side middle part, and the top of infrared temperature monitoring probe is with temperature acquisition hole and is located on the same horizontal plane, the casing rear side is provided with topological identification port, RS485 port and mutual inductor connecting port from below to above in proper order. The utility model discloses can realize anti - electromagnetic interference's while realizing temperature monitoring and temperature control.

Description

Technical Field

[0001] This utility model belongs to the field of wireless temperature measurement, specifically relating to a temperature monitoring device for low-voltage equipment. Background Technology

[0002] The safety and reliability of the power system are the two core elements for the stable operation and continuous power supply of the power industry. However, with rapid economic development and increasing power consumption, some electrical equipment needs to carry large currents. If it operates under overload for a long time, it will cause the temperature to rise. If it is not dealt with in time, it may cause serious consequences.

[0003] Traditional temperature measurement methods, such as those described in "Research on Fault Diagnosis of Power Equipment by Infrared Thermal Imaging," employ infrared cameras and smoothing filtering algorithms to reduce the impact of noise signals on temperature diagnosis, enabling thermal fault monitoring of each phase of transformers. However, they cannot monitor the internal temperature of low-voltage equipment such as distribution boxes and switchgear. Another example is the wireless temperature measurement device CN222318237U, which uses an internal temperature probe on an electrolytic alloy sheet to collect temperature data and transmit it to the wireless temperature measurement host. However, the wireless temperature sensor is battery-powered, resulting in high power consumption, requiring frequent battery replacements for long-term monitoring equipment, which does not meet current needs.

[0004] The existing temperature measurement devices in distribution boxes have some shortcomings that need to be improved during use. Electrical equipment is prone to strong electromagnetic interference under high voltage and high current conditions, which affects the accuracy of temperature monitoring and leads to inaccurate temperature measurement or data transmission interruption.

[0005] Therefore, in order to solve the above problems and achieve temperature control, a temperature monitoring device is urgently needed. Utility Model Content

[0006] The technical problem this invention aims to solve is to achieve temperature monitoring while simultaneously resisting interference. Overcoming the shortcomings of existing technologies, this invention provides a low-voltage equipment temperature monitoring device that can achieve both electromagnetic interference resistance and temperature monitoring and control.

[0007] The technical solution adopted by this utility model to solve its existing problems is: a low-pressure equipment temperature monitoring device, including a housing and a temperature monitor installed inside the housing; the housing 1 includes an anti-electromagnetic interference component 9 and an outer housing 1 from the inside to the outside;

[0008] The temperature monitor includes a controller, a temperature monitoring module, a temperature early warning module, a temperature regulation module, and a communication module, wherein the temperature monitoring module, the temperature early warning module, the temperature regulation module, and the communication module are electrically connected to the controller in sequence.

[0009] The temperature monitoring module includes an infrared temperature monitoring probe, which is located in the temperature acquisition hole 6 in the middle of the front side of the housing. The top of the infrared temperature monitoring probe and the temperature acquisition hole 6 are located on the same horizontal plane. The rear side of the housing is provided with a topology identification port 5, an RS485 port 4 and a current transformer connection port 3 from bottom to top.

[0010] Preferably, the bottom of the housing is provided with a guide rail mounting port 7, which is specifically an irregular groove, wherein the first side is a vertical surface and the second side is specifically an "L" shaped groove.

[0011] Preferably, the temperature warning module includes an indicator light, which is specifically disposed in an indicator light hole located on the top of the housing.

[0012] Preferably, a limit post 10 is provided on the inner side of the housing.

[0013] Preferably, a connector 2 is provided above the bottom guide rail mounting port 7 of the housing, and the connector 2 is electrically connected to a power supply device.

[0014] Preferably, the communication module includes an HPLC communication module, and the HPLC communication module is electrically connected to a controller.

[0015] Preferably, the anti-electromagnetic interference component 9 is provided with holes, and the inner limiting post 10 of the housing corresponds one-to-one with the holes.

[0016] Preferably, the communication module includes an RS485 port 4, which can be connected to a PC via a data cable.

[0017] Preferably, steel balls 11 are provided at both the front and rear ends of the lower part of the limiting post 10. The steel balls 11 are movably connected to compression springs. The radius of the steel balls 11 is slightly larger than the hole of the limiting post 10, and the compression springs are movably disposed inside the steel balls.

[0018] Preferably, the pressure plate 12 is movably connected to the limiting post 10. The inner side of the pressure plate 12 is provided with a groove, one side of which fits with the steel ball, and the other side is a curved groove connected to the inner wall of the pressure plate 12.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This temperature monitoring device uses an infrared temperature monitoring probe through a temperature acquisition hole on the outer casing to collect the temperature of a certain area inside the distribution box, thus solving the problem that traditional temperature monitoring chips can only monitor their own temperature and cannot monitor the temperature inside electrical equipment.

[0021] This temperature monitoring device allows for temperature alarm parameter settings via a host computer system, flexibly configuring three temperature ranges, and dynamically controlling the temperature-regulating fan for temperature control. Internally, the device incorporates an electromagnetic interference (EMI) protection component. This component is located between the device's outer casing and the main board, secured by limiting posts to prevent displacement due to different installation positions. EMI protection components are located on both sides of the main board, effectively preventing the influence of electromagnetic fields generated by high voltage within the distribution box on the results, thus achieving EMI-free temperature acquisition for low-voltage equipment. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of a low-pressure equipment temperature monitoring device.

[0024] Figure 2 This is a structural schematic diagram of a low-pressure equipment temperature monitoring device from another side view.

[0025] Figure 3 This is a schematic diagram of a low-pressure equipment temperature monitoring device from a top view.

[0026] Figure 4 This is a schematic diagram of the structure of an anti-electromagnetic interference component inside the housing of a low-voltage equipment temperature monitoring device;

[0027] Figure 5 This is a circuit diagram of a temperature early warning module and a voltage reduction section in a low-voltage equipment temperature monitoring device.

[0028] Figure 6 This is a circuit diagram of a temperature regulation module in a low-voltage equipment temperature monitoring device.

[0029] Figure 7 This is a schematic diagram of the control principle of a temperature monitoring device for low-pressure equipment.

[0030] Figure 8 This is a schematic diagram of the internal structure of the limit column of a low-pressure equipment temperature monitoring device.

[0031] Figure 9 This is a schematic diagram of the pressure plate structure of a low-pressure equipment temperature monitoring device.

[0032] In the diagram: 1. Housing; 2. Connecting strip; 21. Side of connecting strip; 3. Current transformer connection interface; 4. RS485 port; 5. Topology identification port; 6. Temperature acquisition hole; 7. Guide rail mounting port; 8. Indicator light hole; 9. Electromagnetic interference protection component; 10. Limiting post; 11. Steel ball; 12. Pressure plate. Detailed Implementation

[0033] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0034] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] The attached figure shows the preferred embodiment of this low-pressure equipment temperature monitoring device. The present invention will be further described in detail below with reference to the attached figure.

[0037] As attached Figures 1-9 As shown, this utility model discloses a low-voltage equipment temperature monitoring device, including a housing and a temperature monitor disposed inside the housing. The temperature monitor includes a controller, a temperature monitoring module, a temperature early warning module, a temperature regulation module, and a communication module, wherein the temperature monitoring module, temperature early warning module, temperature regulation module, and communication module are electrically connected to the controller in sequence.

[0038] The controller specifically uses an APM32F103RET6 microcontroller, which mainly processes the collected temperature data and incorporates a low-power programming framework to reduce device power consumption. The temperature monitoring module uses an MLX90621 infrared temperature sensor. The specific connection circuit is as follows... Figure 5As shown, the SCL clock line and SDA data line of the microcontroller's I2C interface are connected to one side of the infrared temperature sensor, enabling the microcontroller to receive data information from the infrared temperature sensor through the I2C interface, specifically the obtained temperature data information.

[0039] The temperature information acquired by the temperature monitoring module is processed internally by the microcontroller, and the current temperature is judged based on the threshold parameters set in the host computer. Specifically, the threshold parameters represent three temperature ranges. When the current temperature is detected to be lower than the higher temperature threshold, no action is taken; when the current temperature is detected to be higher than the higher temperature threshold but lower than the higher temperature threshold, the controller records the current temperature information; when the current temperature is detected to be higher than the higher temperature threshold, the controller records the current temperature information, controls the temperature warning module to issue a high-temperature warning, and controls the temperature regulation module to cool down the temperature.

[0040] The temperature warning module includes an indicator light, which is specifically located in the indicator light hole on the top of the housing. A detailed circuit diagram is shown below. Figure 5 As shown, the controller output is connected to an indicator light, specifically a light-emitting diode, after being current-limited.

[0041] The temperature control module is as follows: Figure 6 The controller's output pins control the operation of the motor, specifically the cooling fan. The controller is connected to the motor via a pin-connected protection circuit, as detailed below. Figure 6 As shown. In actual operation, the wiring is connected to the cooling fan of the distribution box via the reserved pins of the power strip. When the temperature exceeds the maximum temperature threshold, the controller activates the cooling fan.

[0042] The communication module includes an RS485 communication module and an HPLC communication module. The RS485 communication module is used to connect to a PC for debugging. The PC is equipped with a host computer. After connecting the device to the PC via RS485 terminal 4, the host computer on the PC adjusts the higher and highest temperature threshold parameters. The RS485 terminal has a total of 5 interfaces, including two sets of communication interfaces (A1-B1, A2-B2) and a common port. The HPLC communication module is used by the controller to transmit and upload the collected temperature data, and stores the data through a physical medium for later data analysis. Specifically, the LLCMNZ-SM01A chip is selected; the circuit diagram is shown below. Figure 7 As shown.

[0043] The housing 1 comprises an electromagnetic interference (EMI) shielding component 9 and an outer housing 1 from the inside out. The housing can be split into left and right components along its centerline. Limiting posts 10 are provided on the inner side of the housing, and the EMI shielding component 9 has holes. The limiting posts 10 on the inner side of the housing correspond one-to-one with the holes. The limiting posts are used to position the EMI shielding component.

[0044] The infrared temperature monitoring probe of the infrared temperature sensor is located in the temperature acquisition hole 6 in the middle of the front side of the housing. The top of the infrared temperature monitoring probe is on the same horizontal plane as the temperature acquisition hole 6. The rear side of the housing is provided with a topology identification port 5, an RS485 port 4 and a current transformer connection port 3 from bottom to top. The topology identification port 5 and the current transformer connection port 3 are reserved interfaces for measuring the current magnitude as a further functional upgrade of the device.

[0045] The bottom of the housing has a guide rail mounting port 7, which is specifically an irregularly shaped groove, with the first side being a vertical surface and the second side being an "L"-shaped groove. A connection strip 2 is located above the guide rail mounting port 7 at the bottom of the housing. Specifically, in equipment connection, a ribbon cable is connected via the connection strip 2, with one end of the cable connected to the equipment and the other end connected to the power supply box for the equipment. A movable baffle with a fixed connection at one end is provided at the current transformer connection port 3.

[0046] The limiting post 10 has steel balls 11 at both its lower front and rear ends. Each steel ball 11 is movably connected to a compression spring. The radius of each steel ball 11 is slightly larger than the hole in the limiting post 10, and the compression spring is movably positioned inside the steel ball. A pressure plate 12 is movably connected to the limiting post 10. The pressure plate 12 has a groove on its inner side; one side fits the steel ball, and the other side is an arc-shaped groove connected to the inner wall of the pressure plate 12. When installing the anti-electromagnetic interference component 9 into the bottom inner side of the housing 1, the pressure plate 12 is passed through the limiting post from above. When it reaches the appropriate position, the pressure plate 12 is rotated to allow the steel ball to enter the groove and be fixed. To remove the anti-electromagnetic interference component 9, the pressure plate 12 is rotated in the opposite direction, allowing the steel ball 11 to be positioned on the smooth surface of the pressure plate and removed. In this embodiment, the limiting post 10 has steel balls 11 at both its front and rear ends. The limiting post is threadedly fixed to the housing and can be divided into two parts from the center line, which are then fixedly connected by snap-fit ​​mechanisms, facilitating the installation of the internal steel balls and compression spring. The structure of the pressure plate 12 effectively blocks the electromagnetic interference protection component 9, preventing the electromagnetic interference protection component 9 from shaking during transportation and other activities.

[0047] After setting the threshold, install the device. During installation, the device should be mounted inside the distribution box using a guide rail, with the temperature acquisition port facing the high-temperature area of ​​the distribution box that needs to be monitored.

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A temperature monitoring device for low-voltage equipment, characterized in that: The device includes a housing and a temperature monitor installed inside the housing. The housing (1) includes an electromagnetic interference protection component (9) and an outer housing (1) from the inside out. The temperature monitor includes a controller, a temperature monitoring module, a temperature warning module, a temperature regulation module, and a communication module. The temperature monitoring module, temperature warning module, temperature regulation module, and communication module are electrically connected to the controller in sequence. The temperature monitoring module includes an infrared temperature monitoring probe, which is installed in the temperature acquisition hole (6) in the middle of the front side of the housing. The top of the infrared temperature monitoring probe is on the same horizontal plane as the temperature acquisition hole (6). The rear side of the housing is provided with a topology identification port (5), an RS485 port (4), and a current transformer connection port (3) arranged from bottom to top.

2. The low-pressure equipment temperature monitoring device according to claim 1, characterized in that, The bottom of the housing is provided with a guide rail mounting port (7), which is specifically a shaped groove, wherein the first side is a vertical surface and the second side is specifically an "L" shaped groove.

3. The low-pressure equipment temperature monitoring device according to claim 1, characterized in that, The temperature warning module includes an indicator light, which is specifically located in the indicator light hole on the top of the housing.

4. The low-voltage equipment temperature monitoring device according to claim 1, characterized in that, A limit post (10) is provided on the inner side of the housing.

5. A low-pressure equipment temperature monitoring device according to claim 2, characterized in that, A connector (2) is provided above the bottom guide rail mounting port (7) of the housing, and the connector (2) is electrically connected to the power supply device.

6. The low-voltage equipment temperature monitoring device according to claim 1, characterized in that, The communication module includes an HPLC communication module, and the HPLC communication module is electrically connected to a controller.

7. A low-voltage equipment temperature monitoring device according to claim 4, characterized in that, The electromagnetic interference protection component (9) is provided with holes, and the inner side limiting post (10) of the housing corresponds one-to-one with the holes.

8. A low-voltage equipment temperature monitoring device according to claim 1, characterized in that, The communication module includes an RS485 port (4), which can be connected to a PC via a data cable.

9. A low-pressure equipment temperature monitoring device according to claim 7, characterized in that, The lower part of the limiting post (10) is provided with steel balls (11) at both the front and rear ends. The steel balls (11) are movably connected to compression springs. The radius of the steel balls (11) is slightly larger than the hole of the limiting post (10), and the compression springs are movably located inside the steel balls.

10. A low-voltage equipment temperature monitoring device according to claim 9, characterized in that, The pressure plate (12) is movably connected to the limiting post (10). The inner side of the pressure plate (12) is provided with a groove, one side of which fits with the steel ball, and the other side is a curved groove connected to the inner wall of the pressure plate (12).

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