Double-screw-lug NTC (Negative Temperature Coefficient) temperature collection sensor assembly

Abstract

The utility model discloses a double-screw-lug type NTC (Negative Temperature Coefficient) temperature acquisition sensor assembly. The double-screw-lug type NTC temperature acquisition sensor assembly is reinforced by screws on the surfaces of two power device radiators on a tested PWR power board in a 1U semi-bipolar power supply complete machine; the double-screw lug type NTC temperature acquisition sensor assembly comprises a screw lug terminal, and a thermistor is placed in a protection buckle of the screw lug terminal and is encapsulated by flexible epoxy resin; two pins of the thermistor are welded and led out through leads, and when the leads are bent, the bending radius of the leads is larger than 2 mm. The structure of the sensor is convenient to install on the radiator, and the temperature of a test surface on the sensitive radiator is synchronously monitored in real time; machining is easy to achieve, a good machining process method is achieved, the assembly matching relation size is reasonable, the technical requirement of the whole machine is met, and meanwhile the overall quality warehousing qualification rate of products is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to a power supply equipment especially a double screw ear formula NTC temperature acquisition sensor assembly. BACKGROUND

[0002] With the development of electronic science and technology, more integrated, larger current, smaller and thinner power supply technology, power supply equipment diversification high density type, the internal layout of power supply, appearance size and installation mode put forward higher requirements. There are more high temperature control points in the power supply, and the heat sinks of the measured power devices need temperature acquisition. Usually, single point data acquisition is used to meet the adaptability of sensitive elements, connecting wires, fixing seats, local protective covers and other materials.

[0003] However, when collecting temperature at multiple different positions, it is necessary to ensure reasonable measurement accuracy, and the temperature acquisition sensor must be isolated from the environment and the heat radiation source.

[0004] Usually, high-power devices are installed on heat sinks to facilitate heat dissipation, to ensure that the device or module works safely and reliably, and the temperature of the heat sink needs to be collected. The sensor quickly tracks the temperature change of the heat sink and transmits real-time data to the main control board. The main control board calculates and controls the fan in real time according to the feedback data, and the fan cools at different wind speeds.

[0005] Based on the above reasons, a multi-point temperature acquisition NTC sensor assembly is needed for real-time monitoring of high temperature and high reliability.

[0006] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0007] The utility model aims at providing a double screw ear formula NTC temperature acquisition sensor assembly to solve the above technical problems in the prior art.

[0008] The utility model aims at realizing the following technical scheme:

[0009] The double screw ear formula NTC temperature acquisition sensor assembly of the utility model is used to reinforce the double screw ear formula NTC temperature acquisition sensor assembly on the surface of the two power device heat sinks on the measured PWR power board in the 1U half bipolar power supply complete machine.

[0010] The double screw ear formula NTC temperature acquisition sensor assembly comprises a screw ear terminal, and the thermistor is placed in the protection buckle of the screw ear terminal and is filled with flexible epoxy resin.

[0011] The two pins of the thermistor are welded with lead wires, and the lead wire bending radius is greater than 2mm when the lead wire is bent.

[0012] Compared with the existing technology, the double-screw ear NTC temperature sensor component provided by the utility model has a narrow and multi-heat dissipation physical structure layout space in the high-density current element sampling, which not only satisfies the structure of the sensor to be conveniently installed on the radiator, but also synchronously monitors the test surface temperature on the sensitive radiator in real time; it makes full use of the spatial layout, reasonable process design, selects the double NTC temperature resistance acquisition component wiring harness, follows the "universalization, serialization, and interchangeability" three-dimensional design principles, meets the "interface and interchangeability requirements", uses the least time, the most economical investment, and the most mature technology to implement the product interface standards and implementation requirements, and has good functionality and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The resistance-temperature curve of the NTC temperature sensor (B25 / 85=3975K) in the embodiment of the present utility model;

[0014] Figure 2a 、 Figure 2b They are respectively the front view and top view schematic diagrams of thermistor components and lead sizes in an embodiment of the present invention;

[0015] Figure 3 This is a dimension processing diagram of the double screw ear NTC temperature sensor assembly in the embodiment of the utility model;

[0016] Figure 4 This is a schematic diagram of the application circuit principle of the double-screw ear NTC temperature sensor component in the embodiment of the present utility model.

[0017] In the picture:

[0018] 1. Thermistor, 2. Pin node, 3. Lead, 4. Screw terminal, 5. Heat shrink tubing (3 sections, 20mm each), 6. A1008H-4P (front, convex card surface). DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them, and do not constitute a limitation of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] First, the following terms may be used in this article:

[0021] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y includes both “X” or “Y” and “X and Y”.

[0022] The terms "comprising", "containing", "including", "having" or other similar semantic descriptions should be interpreted to be non-exclusive inclusion. For example: including a technical feature element (such as raw materials, components, ingredients, carriers, dosage forms, materials, sizes, parts, components, mechanisms, devices, steps, processes, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or articles, etc.), should be interpreted as not only including the explicitly listed technical feature element, but also including other technical feature elements not explicitly listed but known in the art.

[0023] The contents not described in detail in the embodiments of the utility model belong to the prior art known to the person skilled in the art. The embodiments of the utility model are not marked with specific conditions, and are carried out according to the conventional conditions in the art or the conditions recommended by the manufacturer. The reagents or instruments used in the embodiments of the utility model are not marked with the manufacturer, and are all conventional products that can be obtained by market purchase.

[0024] The double-screw-ear NTC temperature sensing sensor assembly is screwed to the surface of the two power device radiators on the measured PWR power board in the 1U half-bipolar power supply complete machine;

[0025] The double-screw-ear NTC temperature sensing sensor assembly comprises a screw ear terminal, and the thermistor is placed in the protection buckle of the screw ear terminal and is filled with flexible epoxy resin.

[0026] The two pins of the thermistor are welded out by lead wires, and the lead wire bending radius is greater than 2mm when the lead wire is bent.

[0027] The screw ear terminal is formed by stamping H62 brass, the placement position of the thermistor is a rectangular three-side surrounding buckle structure, and the lead wire on the solidification assembly side of the thermistor and the thermistor body are located in the terminal rectangular surrounding buckle.

[0028] The screw ear terminal is provided with a circular mounting hole, the inner diameter of the circular mounting hole is φ3.2, and the outer diameter of the circular mounting hole is φ7.5.

[0029] The thermistor is selected from NTC brand thermistors.

[0030] The ends of the two thermistors are provided with black one-arm heat shrink tubes with a length of 20mm and an interval of 20mm, and a A1008H-4P plug is connected after the wire harness is gathered into a bundle.

[0031] The A1008H-4P plug of the double-screw-ear NTC temperature sensing sensor assembly is connected to the A1008-4P socket of the main control panel CN30.

[0032] The two thermistors of the double-spiral-ear NTC temperature acquisition sensor assembly can accurately measure and collect the temperatures of two heat sinks inside the power supply in real time, and the collected temperature data is transmitted to the MCU of the main control board through an A / D analog-digital signal converter for operation and processing, and a PWR control signal is output to control the rotating speed of the two fans in the system, so that the normal operation of the system circuit can be ensured.

[0033] As can be seen, the double-spiral-ear NTC temperature acquisition sensor assembly of the embodiment of the utility model can meet the requirements of the structure of the sensor for the installation of the heat sink, and can simultaneously and synchronously monitor the surface temperature of the sensitive heat sink.

[0034] The space layout is fully utilized, the process design is reasonable, the double-NTC temperature acquisition resistor acquisition assembly wire harness is selected, the three design principles of generalization, serialization and interchangeability are followed, the interface and interchangeability requirements are met, the product interface standard and implementation requirements are implemented with the least time, the most economical investment and the most mature technology, and good functionality and applicability are achieved.

[0035] The fan in the power supply is started when, and the rotating speed is adjusted. The power supply is loaded and heated, and the precision components in the machine that are very sensitive to heat may be damaged. The negative temperature coefficient NTC thermistor measures the temperature in the equipment by using the negative temperature coefficient resistor, and then transmits the temperature signal to the main control board, and the main control board controls the rotating speed of the fan.

[0036] The utility model, wire harness assembly structure layout meets the wiring installation space physical position requirement, component function design and material inherent characteristic of each material should be reasonable perfect match, ensure 1U half height performance DC power supply heat accurate measurement, also want to give consideration to performance stability, low cost investment, wiring installation is reasonable, the cost of working hours is reasonable, easy to process realizes.

[0037] The module structured high-voltage wire harness of the utility model, the component adopts spiral-ear reinforcement to meet the requirements of frequent disassembly and convenient installation, and can be reused. The wire harness conductor cross-sectional area, temperature requirement, flexibility and optimized anti-interference shielding effect of the component are quantified, excessive size and excessive components are avoided, and the overall size of the component is fully matched with the narrow use environment space.

[0038] The processing method of the double-spiral-ear NTC temperature acquisition sensor assembly meets the reasonable limited space layout connection, ensures the stable temperature acquisition function and performance safety, is easy to process, has a better processing method, the matching relationship size of the component is reasonable, meets the technical requirements of the whole machine, and improves the whole machine quality storage qualification rate.

[0039] In order to more clearly show the technical scheme provided by the utility model and the technical effects generated, the following will describe the in detail with specific embodiments.

[0040] Embodiment 1

[0041] As Figures 1 to 4 shown:

[0042] According to technical requirements:

[0043] As Figure 1 shown, NTC brand thermistor is selected, and the resistance parameter is R25=10KΩ±5%, the NTC thermosensitive sensor is large in resistance value at normal temperature, and the resistance value gradually decreases with the temperature rising, the NTC thermistor is an important sensitive element. The thermosensitive insulation performance of the NTC temperature sensing sensor assembly is good, the resistance value of the NTC thermistor changes with the temperature in the range of 25 DEG C to 85 DEG C, the rate of the resistance value of the NTC thermistor changing with the temperature, B25 / 85=3975K±5%, it can be seen that the assembly has high reliability, small time constant, and the temperature range is -40~120 DEG C.

[0044] As Figure 2a , Figure 2b shown, the thermistor component size is 2.7*2.8*2.3, the internal structure is fragile, and is easily affected by external environment, in order to solve the short service life and poor stability, the thermistor is wrapped in the protection buckle of the screw ear buckle type terminal by the quantitative flexible epoxy resin, the impact resistance and thermal shock resistance can be effectively enhanced, the epoxy resin has excellent insulation and corrosion resistance, can isolate the influence of external environment on the thermistor, guarantees the normal work, and improves the overall performance and reliability of the power supply product.

[0045] As Figure 3As shown in Table 1, the screw lug terminal is made of H62 brass stamping, the inner diameter of the circular hole is φ3.2, and the outer diameter is φ7.5. M3*6 three combination screws can be used to the two radiator positions, the contact metal surface is tinned to resist oxidation, the metal contact has good conductivity, which ensures the stability and reliability of the electrical components. The thermal resistance placement position is rectangular three-sided around the buckle, which plays a good protective role for the thermal resistance body, and the epoxy resin glue is easy to quantitatively seal. The two pins of the thermal resistance are UL10362#28 black American standard line welding leads, the lead bending radius is greater than 2mm when bending the lead, and the solidified component side lead and thermal resistance body are exactly located in the rectangular surrounding buckle of the terminal. The lead tension is strictly controlled during the process to prevent the joint between the lead and the component from breaking or cracking. Two temperature resistance positions are different, and the reinforcement wire length is different, one is 240mm, and the other is 210mm. In order to ensure the flexibility of the wire bending, the two temperature resistance components at the end are spaced 20mm apart by 3 sections of 20mm black single-arm heat shrink tube, which also plays a role in wire protection and wire bundle bundling, and then an A1008H-4P plug is used.

[0046] Table 1: Material matching table for resistance assembly

[0047]

[0048] As Figure 4 shown, the 4P plug of the double screw lug NTC temperature sensor assembly is connected to the A1008-4P socket of the main control board CN30. The two temperature sensing thermal sensors of the double screw lug NTC temperature sensor assembly accurately measure and collect the temperature of the two radiators inside the power supply in real time, and the collected temperature data is transmitted to the MCU single-chip microcomputer of the main control board through the A / D analog-digital signal converter for operation and processing, and the PWR control signal system outputs the speed of the two fans to ensure the normal operation of the whole system circuit.

[0049] In summary, by measuring the resistance value of the NTC thermal resistance, the temperature of the product system environment is known, the temperature is monitored in real time, the fan speed is adjusted quickly and timely. The packaging and installation method of the assembly meets the 1U half whole machine structure size, air layout interval and system environment demand, and improves the overall quality of the product. The assembly is easy to use and install, which can reduce the product manual assembly time.

[0050] Processing method of double screw lug NTC temperature sensor assembly:

[0051] The structure size and position of the two power device radiators of the measured PWR board, and the type and position of the main control board collection terminal.

[0052] The assembly is reliable and stable at both ends, has certain mechanical strength, has proper length, considers actual wiring distance and has reasonable redundancy, is correct in direction, has error-proof process design, is neat and beautiful, and is reasonable in saving assembly and wiring time.

[0053] The environmental conditions of the heat sink of the measured power device should not damage the temperature measuring element, and when the temperature of the measured heat sink dynamically changes, the hysteresis of the sensor assembly should meet the temperature measuring requirements.

[0054] The processing cost is comprehensively considered, a high cost performance assembly is selected, and contribution is made for cost reduction and benefit increase of products.

[0055] The assembly has 100% conduction rate, no short circuit and wrong way phenomenon, the terminal crimping is firm, and the pulling force should meet the technical safety requirements.

[0056] The assembly has good appearance, no burr damage and mechanical damage, and is neat and beautiful.

[0057] The above is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims. The information disclosed in the background art part of the present application is only intended to deepen the understanding of the overall background art of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes the prior art known to those skilled in the art.

Claims

1. A dual spiral ear NTC temperature sensing sensor assembly, characterized in that, In the 1U half bipolar power supply, the surface of the two power device heat sinks on the measured PWR power board is reinforced with screws to the dual-screw ear NTC temperature sensor assembly; The dual-screw ear NTC temperature sensor assembly includes screw ear terminals, the thermistor is placed in the protective buckle of the screw ear terminals and is filled with flexible epoxy resin; The two pins of the thermistor are welded out with lead wires, and the lead wire bending radius is greater than 2mm when bending the lead wire.

2. The dual spiral lead NTC temperature sensing sensor assembly of claim 1, wherein, The screw ear terminals are made of H62 brass stamping, the placement position of the thermistor is a rectangular three-sided buckle structure, and the lead wire on the side of the thermistor solidification assembly and the thermistor body are located in the terminal rectangular buckle.

3. The dual spiral lead NTC temperature sensing sensor assembly of claim 2, wherein, The screw ear terminals are fixed to the positions of the two heat sinks by three combined M3*6 screws, the contact metal surface is tin-plated, the screw ear terminals are provided with a circular mounting hole with an inner diameter of φ3.2 and an outer diameter of φ7.

5.

4. The dual spiral lead NTC temperature sensing sensor assembly of claim 3, wherein, The thermistor selects an NTC brand thermistor.

5. The dual spiral lead NTC temperature sensing sensor assembly of claim 4, wherein, The ends of the two thermistors are provided with black one-arm heat shrink tubes with a length of 20mm and an interval of 20mm, the wire harness is gathered into a bundle, and then an A1008H-4P plug is connected.

6. The dual spiral lead NTC temperature sensing sensor assembly of claim 5, wherein, The A1008H-4P plug of the dual-screw ear NTC temperature sensor assembly is connected to the A1008-4P socket of the main control board CN30.

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