Wireless temperature measuring device

Abstract

The utility model discloses a wireless temperature measuring device, and relates to the technical field of switch cabinets, the wireless temperature measuring device is applied to a switch cabinet, the switch cabinet is provided with a cabinet body and a cabinet door rotatably connected with the cabinet body, and the wireless temperature measuring device comprises a housing arranged on the cabinet door; the temperature measurement module is arranged on one side, facing the mounting cavity, of the shell, is used for measuring the temperature in the mounting cavity and comprises a first temperature measurement sensor and a second temperature measurement sensor; the display screen group is arranged on one side, away from the mounting cavity, of the shell; the fault detection module is used for detecting the state of the first temperature measurement sensor, and when the first temperature measurement sensor breaks down, the controller controls the signal switching module to be triggered, so that the display screen group displays the temperature measured by the second temperature measurement sensor. According to the technical scheme provided by the utility model, the internal temperature of the switch cabinet is continuously monitored, and the influence on the normal operation of the switch cabinet is reduced.

Description

Technical Field

[0001] This utility model relates to the field of switch cabinet technology, and in particular to a wireless temperature measurement device. Background Technology

[0002] Wireless temperature measurement is a temperature monitoring system based on wireless communication technology, used to collect, transmit and process temperature data in real time. The single-chip microprocessor of the wireless temperature sensor controls the temperature of the device under test to be converted into a digital signal by the temperature sensor, and then transmitted to the reader through the wireless transmitter and receiver module.

[0003] Switchgear plays a crucial role in the distribution, control, and protection of electrical energy in power systems. During operation, the electrical connection points inside the switchgear will heat up due to the thermal effect of the current. Temperature sensors can monitor the temperature inside the cabinet in real time. Once the temperature rises abnormally, it can promptly alert maintenance personnel to take measures to avoid short circuits or even fires. After working for a long time, temperature sensors may malfunction, resulting in inaccurate temperature measurements and thus untimely monitoring and maintenance of the switchgear. Utility Model Content

[0004] The main purpose of this invention is to propose a wireless temperature measurement device, which aims to solve the technical problems of inaccurate temperature measurement and untimely monitoring and maintenance caused by temperature sensor failure.

[0005] To achieve the above objectives, the present invention proposes a wireless temperature measurement device applied to a switch cabinet. The switch cabinet has a cabinet body and a door rotatably connected to the cabinet body. The door and the cabinet body together form an installation cavity. The wireless temperature measurement device includes:

[0006] The outer casing is detachably mounted on the cabinet door;

[0007] A temperature measuring module is disposed on the side of the housing facing the mounting cavity. The temperature measuring module is used to measure the temperature inside the mounting cavity. The temperature measuring module includes a first temperature sensor and a second temperature sensor.

[0008] A display screen assembly is located on the side of the housing away from the mounting cavity. The output terminals of both the first and second temperature sensors are electrically connected to the display screen assembly. The display screen assembly is used to display the temperature measured by either the first or second temperature sensor.

[0009] The system includes a controller, a signal switching module, and a fault detection module. The fault detection module, the signal switching module, the temperature measurement module, and the display screen are all electrically connected to the controller. The fault detection module is used to detect the working status of the first temperature sensor. When the first temperature sensor fails, the controller controls the signal switching module to trigger and turn on the display screen and the second temperature sensor, so that the display screen displays the temperature measured by the second temperature sensor.

[0010] In one embodiment, the signal switching module employs a relay switch; and / or, the fault detection module employs a resistor voltage divider detection structure.

[0011] In one embodiment, the outer casing has a mounting groove on the side facing the mounting cavity. The first temperature sensor and the second temperature sensor are respectively disposed in one of the mounting grooves. Each mounting groove is provided with a mounting assembly, the mounting assembly including:

[0012] A slider is slidably disposed in the mounting groove;

[0013] An elastic element is disposed in the mounting groove, with one end of the elastic element elastically connected to the slider and the other end elastically connected to the housing. The elastic element is disposed on the side of the slider away from the first temperature sensor / second temperature sensor.

[0014] A pull ring is connected to the slider;

[0015] The elastic element is compressed such that the slider tends to move toward the first temperature sensor / second temperature sensor to lock the first temperature sensor / second temperature sensor, and the elastic element is compressed when the pull ring is pulled to release the first temperature sensor / second temperature sensor.

[0016] In one embodiment, a cushioning pad is provided at the bottom and / or sides of the mounting groove;

[0017] And / or, the thickness of the first temperature sensor and / or the second temperature sensor is less than or equal to the depth of the mounting groove.

[0018] In one embodiment, a mounting window is provided on the side of the outer casing away from the mounting cavity. The mounting window communicates with the mounting groove, and the display screen is assembled inside the mounting window and does not protrude from the mounting window.

[0019] In one embodiment, a waterproof and breathable membrane is provided between the mounting window and the display screen assembly.

[0020] In one embodiment, the wireless temperature measurement device further includes a signal conversion module, which is electrically connected to the temperature measurement module and the display screen assembly to amplify the output signal of the temperature measurement module.

[0021] In one embodiment, the cabinet door is provided with a through mounting hole, the outer shell is disposed at the mounting hole, and a sealing strip is provided between the outer shell and the mounting hole.

[0022] In one embodiment, the wireless temperature measuring device further includes a mounting base disposed on the edge of the housing, and the mounting base is installed on the cabinet door by threaded fasteners.

[0023] In one embodiment, the mounting base is provided with an adsorption element on the side facing the cabinet door and is adsorbed and connected to the cabinet door.

[0024] In this invention, the wireless temperature measurement device includes a housing mounted on the door of a switchgear cabinet. A temperature measurement module is positioned on the side facing the mounting cavity, while a display screen is positioned on the side facing away from the mounting cavity. The temperature measurement module measures the temperature of the electronic components inside the mounting cavity and transmits the detected signal data to a controller. The controller then transmits the signal data to the display screen, which displays the temperature so that staff can monitor the switchgear temperature promptly. The display screen includes a first temperature sensor and a second temperature sensor, both used to detect the temperature inside the mounting cavity. A fault detection module detects whether the first temperature sensor is functioning correctly. When the first temperature sensor is functioning correctly, the display screen displays the temperature data detected by the first temperature sensor. When the fault detection module detects that the first temperature sensor is malfunctioning and unable to properly detect the temperature inside the mounting cavity, the controller switches the signal to the second temperature sensor. At this time, the second temperature sensor operates normally, and the display screen shows the temperature data measured by the second temperature sensor. Through the coordinated operation of the fault detection module, the signal switching module, and the first and second temperature sensors, even if the first temperature sensor malfunctions, the second temperature sensor will promptly take over the temperature measurement, enabling continuous monitoring of the internal temperature of the switchgear. This reduces the impact on the normal operation of the switchgear, prevents overheating from going undetected and causing damage or safety accidents, and reduces maintenance time and costs. In addition, if the first temperature sensor is working for a long time, it can switch to the second temperature sensor to avoid measurement errors and ensure the accuracy of the temperature measurement data. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A schematic diagram of an embodiment of the wireless temperature measurement device provided by this utility model;

[0027] Figure 2 A schematic diagram of another embodiment of the wireless temperature measurement device provided by this utility model;

[0028] Figure 3 A schematic diagram of another embodiment of the wireless temperature measurement device provided by this utility model;

[0029] Figure 4 A schematic diagram of the mounting components provided by this utility model.

[0030] Explanation of icon numbers:

[0031] 10. Switch cabinet; 11. Cabinet door; 12. Cabinet body; 101. Mounting holes; 102. Sealing strip;

[0032] 100. Housing; 110. Mounting base; 120. Mounting slot;

[0033] 200. Temperature measuring module; 210. First temperature sensor; 220. Second temperature sensor;

[0034] 300. Display screen assembly;

[0035] 400. Mounting component; 410. Slider; 420. Pull ring; 430. Elastic element.

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0038] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0040] Switchgear plays a crucial role in the distribution, control, and protection of electrical energy in power systems. During operation, the electrical connection points inside the switchgear will heat up due to the thermal effect of the current. Temperature sensors can monitor the temperature inside the cabinet in real time. Once the temperature rises abnormally, it can promptly alert maintenance personnel to take measures to avoid short circuits or even fires. After working for a long time, temperature sensors may malfunction, resulting in inaccurate temperature measurements and thus untimely monitoring and maintenance of the switchgear.

[0041] This utility model proposes a wireless temperature measurement device.

[0042] Please see Figure 1 and Figure 3 In one embodiment of this utility model, the wireless temperature measuring device is applied to a switch cabinet 10, the switch cabinet 10 having a cabinet body 12 and a cabinet door 11 rotatably connected to the cabinet body 12, the cabinet door 11 and the cabinet body 12 forming an installation cavity; characterized in that the wireless temperature measuring device includes:

[0043] The outer casing 100 is detachably mounted on the cabinet door 11;

[0044] A temperature measuring module 200 is disposed on the side of the housing 100 facing the mounting cavity. The temperature measuring module 200 is used to measure the temperature inside the mounting cavity. The temperature measuring module 200 includes a first temperature sensor 210 and a second temperature sensor 220.

[0045] A display screen assembly 300 is disposed on the side of the housing 100 away from the mounting cavity. The output terminals of both the first temperature sensor 210 and the second temperature sensor 220 are electrically connected to the display screen assembly 300. The display screen assembly 300 is used to display the temperature measured by either the first temperature sensor 210 or the second temperature sensor 220.

[0046] The system includes a controller, a signal switching module, and a fault detection module. The fault detection module, the signal switching module, the temperature measuring module 200, and the display screen group 300 are all electrically connected to the controller. The fault detection module is used to detect the working status of the first temperature measuring sensor 210. When the first temperature measuring sensor 210 fails, the controller controls the signal switching module to trigger and turn on the display screen group 300 and the second temperature measuring sensor 220, so that the display screen group 300 displays the temperature measured by the second temperature measuring sensor 220.

[0047] In the technical solution of this utility model, the wireless temperature measuring device includes a housing 100, which is installed on the cabinet door 11 of the switch cabinet 10. A temperature measuring module 200 is arranged on the side facing the mounting cavity, and a display screen group 300 is arranged on the side facing away from the mounting cavity. The temperature measuring module 200 measures the temperature of the electronic components inside the mounting cavity and transmits the detected signal data to the controller. The controller then transmits the signal data to the display screen group 300, and the temperature is displayed on the display screen group 300 so that the staff can pay attention to the temperature of the switch cabinet 10 in a timely manner. The display screen group 300 includes a first temperature sensor 210 and a second temperature sensor 220. Both the first temperature sensor 210 and the second temperature sensor 220 are used to detect the temperature inside the mounting cavity. A fault detection module is used to detect whether the first temperature sensor 210 is in normal working condition. When the first temperature sensor 210 is in normal working condition, the display screen group 300 displays the temperature of the first temperature sensor 210. When the fault detection module detects that the first temperature sensor 210 is malfunctioning and cannot properly detect the temperature inside the installation cavity, the controller switches the signal to the second temperature sensor 220. At this time, the second temperature sensor 220 works normally, and the display panel 300 displays the temperature data measured by the second temperature sensor 220. Through the coordinated operation of the fault detection module, the signal switching module, and the first and second temperature sensors 210 and 220, even if the first temperature sensor 210 malfunctions, the second temperature sensor 220 will take over the temperature measurement in time, realizing continuous monitoring of the internal temperature of the switchgear 10, reducing the impact on the normal operation of the switchgear 10, avoiding overheating that cannot be detected in time, resulting in damage or safety accidents, and reducing maintenance time and costs. In addition, if the first temperature sensor 210 is working for a long time, it can also switch to the second temperature sensor 220 to avoid measurement errors and ensure the accuracy of the temperature measurement data.

[0048] Specifically, the switch cabinet 10 includes a cabinet body 12 and a cabinet door 11 rotatably connected to the cabinet body 12. The cabinet door 11 and the cabinet body 12 together form an installation cavity. Switching devices such as circuit breakers and load switches are installed in the installation cavity. It also includes busbars, current transformers, voltage transformers, surge arresters, and various instruments and protective devices. The cabinet body 12 serves as a supporting structure to protect the internal structure from damage and dust. By operating the switching devices inside the switch cabinet 10, the circuit can be connected and disconnected. This will not be described in detail here. Since the various electrical components inside the installation cavity generate heat during operation, excessively high temperatures can affect the performance of the switchgear 10. Therefore, a wireless temperature measuring device needs to be installed on the switchgear 10, including a housing 100. The housing 100 serves as the main body for installation and can be made of engineering plastics such as glass fiber reinforced nylon PA+GF, aluminum alloy, or stainless steel. The housing 100 is installed on the cabinet door 11. A temperature measuring module 200 is installed on the side of the housing 100 facing the installation cavity, and a display screen group 300 is installed on the side away from the installation cavity. The display screen group 300 faces outward, allowing operators to easily obtain temperature information inside the installation cavity from the display screen group 300. Inside the housing 100, a controller, a signal switching module, a fault detection module, and a circuit board are also installed. The controller, signal switching module, and fault detection module are electrically connected on the circuit board. The fault detection module is used to detect whether the first temperature sensor 210 is working properly. The fault detection module can use an operational amplifier comparator detection circuit. The output signal of the first temperature sensor 210 is compared with the set reference voltage. If the signal exceeds the normal range, it indicates that the first temperature sensor 210 is faulty. A microcontroller, such as a 51 series microcontroller or an STM32, can also be used. The analog-to-digital conversion pin of the microcontroller is connected to the first temperature sensor 210, and the output pin is connected to the display screen group 300. The output signal of the first temperature sensor 210 is sampled through analog-to-digital conversion to determine whether it is working properly. The signal switching module can use a multiplexer, such as a 74HC4051 or a CD4052, to achieve signal switching. The first temperature sensor 210 and the second temperature sensor 220 are connected to the multiplexer at the same time, and its control pin is connected to the output of the fault detection module. After the fault detection module detects a fault in the first temperature sensor 210, the fault detection module outputs a control signal to make the multiplexer select another signal, namely the second temperature sensor 220, to be output to the display screen, so as to realize uninterrupted real-time monitoring of the temperature of the switch cabinet 10.

[0049] In an embodiment of this utility model, the signal switching module uses a relay switch. The coil pin of the relay is connected to the input terminal of the fault detection module, and the relay switch is connected to the input terminals of the second temperature sensor 220 and the display screen group 300 respectively. When the fault detection module detects a fault in the first temperature sensor 210, it outputs a signal to energize the coil of the relay switch, closes the contacts, and enables the second temperature sensor 220 to conduct with the display screen group 300, thereby enabling the display screen group 300 to display the measured temperature of the second temperature sensor 220. In one embodiment, the fault detection module uses a resistor voltage divider detection structure, that is, two resistors are set on the circuit board to form a voltage divider circuit. The output signal of the first temperature sensor 210 is connected to the positive input terminal of one of the voltage comparators, and the negative input terminal is connected to the reference voltage. By comparing the voltage after voltage division with the reference voltage, if the comparator outputs a high level, a fault occurs. The structure is simple and easy to switch the second temperature sensor 220, so as to continuously monitor the inside of the switch cabinet 10.

[0050] In an embodiment of this utility model, the outer shell 100 is provided with a mounting groove 120 on the side facing the mounting cavity. The first temperature sensor 210 and the second temperature sensor 220 are respectively disposed in one of the mounting grooves 120. Each mounting groove 120 is correspondingly provided with a mounting assembly 400, and the mounting assembly 400 includes:

[0051] Slider 410 is slidably disposed in the mounting groove 120;

[0052] An elastic element 430 is disposed in the mounting groove 120, and one end of the elastic element 430 is elastically connected to the slider 410, and the other end is elastically connected to the housing 100. The elastic element 430 is disposed on the side of the slider 410 away from the first temperature sensor 210 / the second temperature sensor 220.

[0053] A pull ring 420 is connected to the slider 410;

[0054] The elastic element 430 is compressed such that the slider 410 tends to move toward the first temperature sensor 210 / the second temperature sensor 220 to lock the first temperature sensor 210 / the second temperature sensor 220, and the elastic element 430 is compressed when the pull ring 420 is pulled to release the first temperature sensor 210 / the second temperature sensor 220.

[0055] like Figure 1 and Figure 4As shown, the first temperature sensor 210 and the second temperature sensor 220 are respectively disposed in a mounting slot 120, that is, they are independently disposed to avoid affecting the detection. The elastic element 430 is a spring. The mounting slot 120 includes a first slot and a second slot. The temperature sensor is placed in the first slot, and the slider 410 and the elastic element 430 are disposed in the second slot. The slider 410 slides in the second slot. The end of the slider 410 away from the elastic element 430 is provided with a plug, which is used to abut against the first temperature sensor 210 / second temperature sensor 220. When it is necessary to put the temperature sensor into the mounting slot 120, the pull ring 420 is pulled, which compresses the elastic element 430 and releases space. After the temperature sensor is put in, the pull ring 420 is released, the elastic element 430 is released and rebounds, driving the slider 410 to move towards the temperature sensor so that the plug abuts against the temperature sensor and prevents the temperature sensor from falling out of the mounting slot 120.

[0056] In another embodiment, the mounting component 400 includes:

[0057] The elastic buckle has two ends installed on the edge of the mounting groove 120, and the middle is arched and protrudes toward the inner cavity of the mounting groove 120, so as to squeeze the first temperature sensor 210 / second temperature sensor 220 after the first temperature sensor 210 / second temperature sensor 220 enters the mounting groove 120.

[0058] A pull ring 420 is connected to one end of the elastic buckle so that the elastic buckle can be opened by pulling the pull ring 420.

[0059] Specifically, the mounting assembly 400 includes a resilient latch. One end of the resilient latch is mounted on the edge of the mounting groove 120 facing the mounting cavity, and the other end is mounted inside the mounting groove 120. A pull member is located on the side of the resilient latch near the mounting cavity. Because the middle of the resilient latch is arched and protrudes into the mounting groove 120, it blocks other structures from entering or exiting the mounting groove 120. When installing the first temperature sensor 210 or the second temperature sensor 220, pulling the pull member causes the arched structure of the resilient latch to move towards the inner wall of the mounting groove 120, thus freeing up space in the mounting groove 120 for the first temperature sensor 210 to be installed. Temperature sensor 210 or second temperature sensor 220 is installed in the corresponding mounting slot 120. When the pull is released, the elastic buckle rebounds, and the arched structure continues to protrude toward the inner cavity of the mounting slot 120, thereby limiting the first temperature sensor 210 and the second temperature sensor 220 in the mounting slot 120. Regardless of which mounting slot 120 is in, the arched structure of the elastic buckle is limited to the edges of the first temperature sensor 210 and the second temperature sensor 220, so as to avoid affecting the temperature measurement of the measuring ends of the first temperature sensor 210 and the second temperature sensor 220 and improve the temperature measurement accuracy.

[0060] The elastic buckle can be made of rubber, which has a certain degree of elasticity, is wear-resistant, and has a long service life. It can also be made of plastic, nylon, or polyoxymethylene, etc. There are no restrictions on its use.

[0061] In an embodiment of this utility model, buffer pads are provided at the bottom and sides of the mounting groove 120. The buffer pads can prevent damage to the first temperature sensor 210 and the second temperature sensor 220, improve the accuracy of temperature measurement, ensure the normal operation of the switch cabinet 10, and also reduce the impact of vibration generated by the switch cabinet 10 during operation or door opening and closing on the first temperature sensor 210 and the second temperature sensor 220, thereby reducing maintenance costs.

[0062] In one embodiment, the thickness of the first temperature sensor 210 and / or the second temperature sensor 220 is less than or equal to the depth of the mounting groove 120, so that when the cabinet door 11 is closed, the detection ends of the first temperature sensor 210 and the second temperature sensor 220 will not protrude from the mounting groove 120 to avoid hitting the electronic components inside the switch cabinet 10, thus ensuring the stable operation of the switch cabinet 10.

[0063] In an embodiment of this utility model, a mounting window is provided on the side of the outer casing 100 away from the mounting cavity. The mounting window communicates with the mounting groove 120. The display screen assembly 300 is disposed within the mounting window and does not protrude from the mounting window. Please refer to [reference needed]. Figure 1 and Figure 3 The installation window is located on the outward-facing side of the housing 100, so that when the display assembly 300 is installed in the installation window, staff or other personnel can directly obtain the temperature information inside the equipment on the display assembly 300, which is simple and quick. In addition, the mounting slot 120 is connected to the installation window, which facilitates the connection to the circuit board through wires. The display assembly 300 is inside the installation window, which reduces the probability of the display assembly 300 being bumped or even damaged, and does not affect the display of temperature data on the display assembly 300. In addition, the connection between the mounting slot 120 and the installation window facilitates direct connection. If a flexible circuit board (FPC) is used, it has good flexibility, can be bent and folded, reduces the space occupied, and achieves installation in a compact installation space.

[0064] In an embodiment of this utility model, a waterproof and breathable membrane is provided between the installation window and the display screen assembly 300. Specifically, the waterproof and breathable membrane is provided on the side of the installation window away from the installation cavity, i.e., at the entrance of the installation window, so that after the display screen assembly 300 is installed into the installation window, the entrance of the installation window is sealed. This can be used to balance the air pressure inside and outside the outer shell 100, and also to prevent external dust and moisture from entering the interior of the outer shell 100, i.e., into the installation window, and affecting the operation of the display screen assembly 300, circuit board, and temperature measuring module 200. In addition, the waterproof and breathable membrane is only provided on the side of the cabinet door 11 facing outward, and does not completely confine the display screen assembly 300 and controller and other structures inside the outer shell 100, so it does not affect the heat dissipation of the display screen assembly 300 and controller and other structures inside the outer shell 100.

[0065] In an embodiment of this utility model, the wireless temperature measuring device further includes a signal conversion module, which is electrically connected to the temperature measuring module 200 and the display screen group 300 to amplify the output signal of the temperature measuring module 200.

[0066] Specifically, the signal conversion module is located inside the housing 100, specifically between the display screen group 300 and the temperature measuring module 200. The signal conversion module is electrically connected to the controller and wired to the display screen group 300. It is used to amplify, filter, and process the signals output by the first temperature sensor 210 and the second temperature sensor 220 to improve the quality and stability of the signals, so that the temperature data can be displayed more accurately on the display screen group 300.

[0067] The signal amplification module can be a signal amplification circuit or a filtering circuit.

[0068] In an embodiment of this utility model, the cabinet door 11 is provided with a through mounting hole 101, and the outer shell 100 is disposed at the mounting hole 101. A sealing strip 102 is provided between the outer shell 100 and the mounting hole 101. When the outer shell 100 is installed on the mounting hole 101 of the cabinet door 11, the sealing strip 102 is compressed to fill the gap between the outer wall of the outer shell 100 and the inner wall of the mounting hole 101 of the cabinet door 11, effectively preventing external dust, moisture and other external substances from entering the mounting cavity and affecting the operation of the internal electrical components.

[0069] Please refer to Figure 2 and Figure 3In an embodiment of this utility model, the wireless temperature measuring device further includes a mounting base 110. The mounting base 110 is disposed on the edge of the outer shell 100 and is installed on the cabinet door 11 by threaded fasteners. The outer shell 100 has the same shape as the mounting hole 101, so that the outer shell 100 can be inserted into the mounting hole 101. In order to improve the stability of the installation of the outer shell 100 and the cabinet door 11 and prevent the outer shell 100 from falling off, a mounting base 110 is provided on the outer edge of the outer shell 100 away from the mounting cavity. That is to say, when the outer shell 100 enters the mounting cavity, the mounting base 110 is provided. After hole 101, mounting base 110 is snapped onto the outside of cabinet door 11 and attached to the outer wall of cabinet door 11. Then, threaded fasteners such as screws and bolts pass through mounting base 110 and are screwed onto cabinet door 11, making the connection between housing 100 and cabinet door 11 more stable. Housing 100 and mounting base 110 can be integrally formed to ensure the stability of housing 100 structure. It should be noted that when the length of the threaded fastener passes through mounting base 110 and is screwed onto cabinet door 11, the threaded fastener should not protrude from the inner wall of cabinet door 11 to avoid the threaded fastener protruding too much and damaging electronic components when the cabinet door 11 is fastened.

[0070] In an embodiment of this utility model, the mounting base 110 is provided with an adsorption member on the side facing the cabinet door 11, and is adsorbed and connected to the cabinet door 11.

[0071] In one embodiment, the adsorption component is an adhesive such as double-sided tape. The adhesive is installed on the mounting base 110. After the outer shell 100 is installed into the mounting hole 101, the mounting base 110 is snapped onto the outside of the mounting hole 101 and attached to the outer wall of the cabinet door 11. Due to the adhesive, the mounting base 110 is bonded to the outer wall of the cabinet door 11, initially connecting the outer shell 100 and the cabinet door 11 to prevent displacement. Then, the threaded fastener is passed through the mounting base 110 and screwed onto the cabinet door 11. That is, the screwing and bonding are combined to make the installation of the outer shell 100 and the cabinet door 11 quick and stable.

[0072] In one embodiment, the mounting base 110 is magnetically connected to the cabinet door 11. If the cabinet door 11 is made of metal, a magnet or other adsorption component is provided on the side of the mounting base 110 facing the cabinet door 11. That is, after the outer shell 100 is installed in the mounting hole 101, the mounting base 110 is adsorbed onto the cabinet door 11. If the cabinet door 11 is made of non-magnetic plastic, a metal sheet or other material can be pasted on the cabinet door 11 at the position corresponding to the mounting base 110. The metal sheet is relatively thin, which can be magnetically connected to the mounting base 110 while avoiding being too thick to affect the assembly of the mounting base 110 and the outer shell 100. After the mounting base 110 is magnetically connected to the cabinet door 11, the outer shell 100 is stably installed in the mounting hole 101 by screwing in the threaded fastener.

[0073] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A wireless temperature measurement device, applied to a switch cabinet, the switch cabinet having a cabinet body and a cabinet door rotatably connected to the cabinet body, the cabinet door and the cabinet body forming an installation cavity; characterized in that, The wireless temperature measurement device includes: The outer casing is detachably mounted on the cabinet door; A temperature measuring module is disposed on the side of the housing facing the mounting cavity. The temperature measuring module is used to measure the temperature inside the mounting cavity. The temperature measuring module includes a first temperature sensor and a second temperature sensor. A display screen assembly is located on the side of the housing away from the mounting cavity. The output terminals of both the first and second temperature sensors are electrically connected to the display screen assembly. The display screen assembly is used to display the temperature measured by either the first or second temperature sensor. The system includes a controller, a signal switching module, and a fault detection module. The fault detection module, the signal switching module, the temperature measurement module, and the display screen are all electrically connected to the controller. The fault detection module is used to detect the working status of the first temperature sensor. When the first temperature sensor fails, the controller controls the signal switching module to trigger and turn on the display screen and the second temperature sensor, so that the display screen displays the temperature measured by the second temperature sensor.

2. The wireless temperature measurement device as described in claim 1, characterized in that, The signal switching module uses a relay switch; and / or, the fault detection module uses a resistor voltage divider detection structure.

3. The wireless temperature measurement device as described in claim 2, characterized in that, The outer casing has a mounting groove on the side facing the mounting cavity. The first temperature sensor and the second temperature sensor are respectively disposed in one of the mounting grooves. Each mounting groove is provided with a mounting assembly, which includes: A slider is slidably disposed in the mounting groove; An elastic element is disposed in the mounting groove, with one end of the elastic element elastically connected to the slider and the other end elastically connected to the housing. The elastic element is disposed on the side of the slider away from the first temperature sensor / second temperature sensor. A pull ring is connected to the slider; The elastic element is compressed such that the slider tends to move toward the first temperature sensor / second temperature sensor to lock the first temperature sensor / second temperature sensor, and the elastic element is compressed when the pull ring is pulled to release the first temperature sensor / second temperature sensor.

4. The wireless temperature measurement device as described in claim 3, characterized in that, A cushioning pad is provided at the bottom and / or sides of the mounting slot; And / or, the thickness of the first temperature sensor and / or the second temperature sensor is less than or equal to the depth of the mounting groove.

5. The wireless temperature measurement device as described in claim 3, characterized in that, An installation window is provided on the side of the outer casing away from the mounting cavity. The installation window communicates with the mounting groove. The display screen is assembled inside the installation window and does not protrude from the installation window.

6. The wireless temperature measurement device as described in claim 5, characterized in that, A waterproof and breathable membrane is provided between the installation window and the display screen assembly.

7. The wireless temperature measurement device as described in claim 2, characterized in that, The wireless temperature measurement device also includes a signal conversion module, which is electrically connected to the temperature measurement module and the display screen group to amplify the output signal of the temperature measurement module.

8. The wireless temperature measuring device according to any one of claims 1 to 7, characterized in that, The cabinet door has a through mounting hole, the outer shell is located at the mounting hole, and a sealing strip is provided between the outer shell and the mounting hole.

9. The wireless temperature measurement device as described in claim 8, characterized in that, The wireless temperature measurement device also includes a mounting base, which is located on the edge of the housing and is mounted to the cabinet door by threaded fasteners.

10. The wireless temperature measurement device as described in claim 9, characterized in that, The mounting base is provided with an adsorption element on the side facing the cabinet door, and is adsorbed and connected to the cabinet door.

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