Straightening comb automatic aging temperature measuring equipment

Abstract

The application discloses a straightening comb automatic aging temperature measuring equipment, which comprises a rack and at least one layer of test station layers arranged on the rack. The test station layers are arranged with multiple groups of independent test units in the horizontal direction. Each test unit comprises a positioning jig, a pressing mechanism, a non-contact infrared temperature measuring module and an electric parameter detection module, which are used for collecting working voltage and working current data in the aging process of the straightening comb in real time. A timing module is used for automatically starting timing after the pressing is in place and the power supply is turned on, and automatically cutting off the power supply of the corresponding station when the preset aging time is reached. The main control module is used for controlling the test process, collecting and processing the detection data, and executing the protection action when the parameters are abnormal. The heat removal device is arranged in the rack and used for removing the heat inside the equipment. The technical scheme of the application aims to solve the problems of low aging test efficiency and inaccurate temperature measurement of the straightening comb.

Description

Technical Field

[0001] This invention relates to the field of automatic performance testing equipment for small household appliances, and in particular to an automatic aging temperature measuring device for hair straighteners. Background Technology

[0002] As a mainstream small hair styling appliance, hair straighteners must undergo aging tests before leaving the factory to verify their thermal stability and electrical safety. Existing aging test equipment generally suffers from the following shortcomings: First, low automation, relying heavily on manual clamping and timing inspections. Single-machine testing stations are limited, making multi-station parallel independent testing impossible. Furthermore, manual clamping makes it difficult to ensure consistent temperature measurement positions and fixation states for each product, leading to inconsistent testing conditions within the same batch and low data comparative value. Second, the equipment lacks an effective heat dissipation mechanism. During aging, the product continuously generates heat, causing heat accumulation and a continuously rising test environment temperature, severely interfering with the accuracy of non-contact infrared temperature measurement. This also poses overheating and safety hazards. Third, the testing dimensions are limited, only performing power-on timing. It cannot simultaneously monitor the product's operating voltage, operating current, and heating temperature in real time. In case of abnormalities such as short circuits, overcurrent, overheating, or open circuits, it cannot provide timely power-off protection, making faults prone to escalation and lacking test data traceability capabilities. Summary of the Invention

[0003] The main objective of this invention is to provide an automatic aging temperature measurement device for hair straighteners, aiming to solve the problems of low efficiency and inaccurate temperature measurement in hair straightener aging tests.

[0004] To achieve the above objectives, the present invention proposes an automatic aging and temperature testing device for hair straighteners, comprising a frame and at least one testing station layer disposed on the frame. The testing station layer is arranged in a horizontal array with multiple independent testing units, each testing unit comprising: A positioning fixture is fixed on the test station layer and has a limiting groove that matches the shape of the straight hair comb to be tested. A clamping mechanism is provided on the side of the positioning fixture and is used to clamp and fix the straightening comb that is inserted into the limiting groove. A non-contact infrared temperature measurement module is set next to the positioning fixture, with its temperature measuring end facing the heating area of ​​the straight hair comb in the limiting groove, for real-time collection of heating temperature data; The electrical parameter detection module is used to collect the working voltage and current data of the hair straightener during the aging process in real time. The timing module is used to automatically start timing after the clamping is in place and the power supply is turned on, and to automatically cut off the power supply to the corresponding station when the preset aging time is reached. The device also includes a main control module and a heat dissipation device. The main control module is electrically connected to the pressing mechanism, infrared temperature measurement module, electrical parameter detection module, timing module and heat dissipation device respectively, and is used to control the testing process, collect and process test data, and perform protection actions when parameters are abnormal. The heat dissipation device is set in the frame and is used to dissipate heat from inside the device.

[0005] In one possible implementation, the positioning fixture has an exhaust channel inside, and the exhaust channels of all positioning fixtures on the same test station layer are interconnected to form a converged air duct extending along the length of the station layer. The end of the converged air duct is provided with an air outlet. The heat dissipation device is connected to the air outlet through a connecting pipe to extract the heat emitted by the straightening combs in each positioning fixture to the outside of the equipment in real time.

[0006] In one possible implementation, the clamping mechanism includes a clamping cylinder and an insulating pressure head, wherein the piston rod end of the clamping cylinder is connected to the insulating pressure head, and the insulating pressure head is directly opposite the limiting groove.

[0007] In one possible implementation, speed control valves are provided at both ends of the air inlet and air outlet passages of the clamping cylinder.

[0008] In one possible implementation, the non-contact infrared temperature measurement module includes a probe bracket and an infrared temperature measurement probe mounted on the probe bracket. The probe bracket is positioned above the test station layer, and the temperature measuring end of the infrared temperature measurement probe is vertically downward and maintains a preset fixed distance from the heating surface of the straightening comb in the limiting groove.

[0009] In one possible implementation, each of the test units corresponds to an independent power supply circuit, and the power supply circuit is provided with a power supply interface that matches the hair straightener. The electrical parameter detection module includes a current detection unit connected in series in the power supply circuit and a voltage detection unit connected in parallel in the power supply circuit, used to determine the short circuit, open circuit and power abnormality of the hair straightener.

[0010] In one possible implementation, the rack has a storage cabinet and a test chamber, the test station layer is disposed in the test chamber, and the heat dissipation device is installed in the storage cabinet.

[0011] In one possible implementation, the rack has two test station layers, each of which is arranged vertically and horizontally.

[0012] This invention's technical solution utilizes an array of multiple independent testing units. Each unit integrates a contour positioning fixture, an automatic clamping mechanism, a non-contact infrared temperature measurement module, an electrical parameter detection module, and an independent timing module. This enables parallel and independent aging tests on multiple hair straighteners. Each workstation can be independently started, stopped, and parameter-set, automating the entire testing process. This solves the problems of low batch testing efficiency, large timing errors, and frequent human error caused by existing manual feeding and timing methods. Furthermore, by creating exhaust channels within each positioning fixture and connecting them into a unified air duct, along with a heat dissipation device, the heat generated during product aging is forcibly extracted from the equipment in real time. Stable control of the ambient temperature inside the test chamber was achieved, solving the problem that the accuracy of non-contact infrared temperature measurement was severely affected by environmental interference due to heat accumulation inside traditional equipment. This significantly improved the reliability and consistency of dynamic monitoring data of heating temperature during the aging process. In addition, by equipping each test unit with an independent electrical parameter synchronous detection circuit and abnormal protection logic of the main control module, immediate automatic power-off and audible and visual alarms were achieved for short circuit, open circuit, power deviation, and over-temperature faults. This solved the problems of existing equipment having a single detection dimension, being unable to detect and isolate faulty products in a timely manner, and having potential safety hazards. This made the testing process safe and controllable and had complete full-process data traceability capabilities. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the test station layer according to an embodiment of the present invention; Figure 3 This is an enlarged schematic diagram of the structure at point A in an embodiment of the present invention; Figure 4 This is a schematic diagram of the back of a device according to an embodiment of the present invention.

[0015] Explanation of icon numbers: 1. Frame; 11. Test station layer; 12. Test unit; 13. Storage cabinet; 14. Test chamber; 2. Positioning fixture; 21. Limiting groove; 3. Clamping mechanism; 31. Clamping cylinder; 32. Insulating pressure head; 33. Speed ​​control valve; 4. Non-contact infrared temperature measurement module; 41. Probe bracket; 42. Infrared temperature measurement probe; 5. Electrical parameter detection module; 6. Timing module; 7. Heat dissipation device; 71. Exhaust duct; 72. Centralized air duct; 74. Air outlet.

[0016] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0018] To address the problems in the background technology, this invention proposes an automatic aging and temperature testing device for hair straighteners, comprising a frame 1 and at least one testing station layer 11 disposed on the frame 1. The testing station layer 11 is arranged in a horizontal array with multiple sets of independent testing units 12, each testing unit 12 comprising: The positioning fixture 2 is fixed on the test station layer 11 and has a limiting groove 21 that matches the shape of the straight hair comb to be tested. The clamping mechanism 3 is located beside the positioning fixture 2 and is used to clamp and fix the straightening comb that is inserted into the limiting groove 21. A non-contact infrared temperature measurement module 4 is set on the side of the positioning fixture 2, with its temperature measuring end facing the heating area of ​​the straight hair comb in the limiting groove 21, for real-time collection of heating temperature data. Electrical parameter detection module 5 is used to collect the working voltage and working current data of the hair straightener during the aging process in real time; The timing module 6 is used to automatically start timing after the clamping is in place and the power supply is turned on, and to automatically cut off the power supply to the corresponding station when the preset aging time is reached. The device also includes a main control module and a heat dissipation device 7. The main control module is electrically connected to the pressing mechanism 3, the infrared temperature measurement module, the electrical parameter detection module 5, the timing module 6 and the heat dissipation device 7, respectively, and is used to control the testing process, collect and process the test data, and perform protection actions when the parameters are abnormal. The heat dissipation device 7 is set inside the frame 1 and is used to dissipate the heat inside the device.

[0019] Combined with reference Figures 1 to 4As shown, in this embodiment, the equipment includes a frame 1, which is structurally divided into a lower cabinet and an upper test chamber 14. The cabinet is used to install electrical control devices and a heat dissipation device 7, while the test chamber 14 provides a relatively enclosed testing space. The test chamber 14 has at least one test station layer 11, which can be configured as two parallel layers according to production capacity requirements. Each test station layer 11 has multiple independent test units 12 arranged in a horizontal array. Each test unit 12 can independently complete the aging test of a hair straightener without interference. Each test unit 12 integrates a positioning fixture 2, a clamping mechanism 3, a non-contact infrared temperature measurement module 4, an electrical parameter detection module 5, and a timing module 6. The positioning fixture 2 is fixed to the mounting panel of the testing station layer 11 by bolts. Its body is machined with a contour-fitting limiting groove 21 that perfectly matches the outline of the straightener to be tested. This limiting groove 21 precisely fits the handle and body of the straightener, ensuring that the heating comb teeth or heating plate area is uniquely determined in both the horizontal and vertical directions after the straightener is placed in. This guarantees that the temperature measurement position and distance are completely consistent for each product during each clamping, providing a basis for subsequent horizontal comparison of non-contact temperature measurement data. An exhaust channel 71 running through the positioning fixture 2 along its length or width is also provided inside. All the exhaust channels 71 of the positioning fixtures 2 on the same layer are connected end-to-end during installation to form a combined air duct 72 extending along the overall length of the station layer. Air outlets 74 are provided at both ends or one end of the combined air duct 72. These exhaust ducts 71 and the combined air ducts 72 constitute a heat collection and flow path, which can promptly constrain and concentrate the heat continuously emitted by each hair straightener during the aging and power-on process, preventing the heat from spreading disorderly into the test chamber 14 space and avoiding the gradual increase of ambient temperature.

[0020] The clamping mechanism 3 is positioned above the positioning fixture 2 and includes a cylinder fixing bracket. A clamping cylinder 31 is vertically mounted on the fixing bracket. The piston rod end of the clamping cylinder 31 is equipped with a pressure head made of an insulated and flexible material, such as a silicone pressure head. This pressure head is positioned directly in the appropriate area of ​​the limiting groove 21 of the positioning fixture 2, typically at the handle. After the straightener is inserted, the cylinder extends to clamp and fix the product, preventing displacement due to vibration or thermal deformation during the aging process, which could affect the accuracy of temperature measurement. The non-contact infrared temperature measurement module 4 is fixed to the frame 1 via a probe bracket 41. The probe bracket 41 is equipped with one or more infrared temperature measurement probes 42, which are distributed as needed. The temperature measurement window of each probe is vertically downward, facing the heating core area of ​​the straightener in the lower limiting groove 21, and a preset fixed distance is maintained between the temperature measurement window and the heating surface of the product being measured.

[0021] Furthermore, the electrical parameter detection module 5 is integrated into the independent power supply circuit of each test unit 12. Each test unit 12 is equipped with a power socket that matches the power plug of the hair straightener and has an independent on / off control relay. In the power supply circuit, a current detection sensor, such as a Hall current sensor or a precision sampling resistor, is connected in series, and a voltage sampling circuit is connected in parallel to collect the current and terminal voltage flowing through the hair straightener during the aging process in real time and transmit these electrical signals to the main control module. The main control module usually adopts a programmable logic controller (PLC), which has preset upper and lower limit thresholds for voltage and current and over-temperature thresholds. After the magnetic switch of the clamping cylinder 31 detects that the cylinder is clamped in place and the power supply circuit is connected, the timing module 6 automatically triggers the main control module to start the countdown. The preset aging time for each station can be set individually or uniformly. During the timing process, the timing display screen on the front of the station displays the remaining time in real time. When the countdown reaches zero, the main control module controls the power supply relay of that station to disconnect and automatically stop the test. If, during the aging process, the real-time operating voltage, operating current, or heating temperature of a certain workstation exceeds the preset safety range, such as a short circuit causing a sudden increase in current, an open circuit causing zero current, or an abnormal increase in temperature, the main control module will immediately cut off the power supply to the abnormal workstation. It will also provide audible and visual alarms and display abnormal information through the three-color alarm light on the top of rack 1 and the human-machine interface touch screen on the front of test chamber 14, accurately locating the faulty workstation and recording complete data at the moment of the abnormality for easy traceability and analysis, thus preventing further product damage and safety accidents.

[0022] Meanwhile, the front of rack 1 features a human-machine interface touchscreen, allowing operators to uniformly set parameters such as overall aging time and voltage / current thresholds. Operators can also individually start / stop and modify parameters for any workstation. Each workstation has an independent control panel including start / stop buttons, status indicator lights, a digital voltmeter, and a timing display, supporting fully independent manual operation and real-time monitoring of each workstation. An emergency stop button is conveniently located on the front of the cabinet, allowing for one-button power cut-off of all workstations in emergencies. Through this structure, the equipment achieves automatic clamping and positioning of straightening combs, fully automatic timing aging, multi-dimensional synchronous real-time monitoring of voltage, current, and temperature, intelligent heat dissipation and temperature control, and rapid anomaly protection, significantly improving the efficiency, data accuracy, and operational safety of batch aging tests.

[0023] In one possible implementation, the positioning fixture 2 has an exhaust channel 71 inside, and the exhaust channels 71 of all positioning fixtures 2 on the same test station layer 11 are interconnected to form a converged air duct 72 extending along the length of the station layer. The end of the converged air duct 72 is provided with an air outlet 74. The heat dissipation device 7 is connected to the air outlet 74 via a connecting pipe to extract the heat emitted by the straightening combs in each positioning fixture 2 to the outside of the equipment in real time.

[0024] Combined with reference Figures 1 to 4 As shown, in this embodiment, each positioning fixture 2 has an independent exhaust channel 71 inside its body. The exhaust channel 71 can be formed by directly casting a cavity inside the side wall or bottom plate of the fixture. One or both ends of the channel extend to the side interface of the fixture, and several ventilation slots or vents are provided between the exhaust channel 71 and the bottom or side wall of the upper contour limiting groove 21, so that when the straightener is placed in the limiting groove 21 and powered on, the heated air around its heating area can naturally or be forced to convect into the exhaust channel 71. All positioning fixtures 2 in the same test station layer 11 are arranged closely in a straight array, and the exhaust channels 71 of adjacent positioning fixtures 2 are connected end to end, thereby splicing and combining the various independent exhaust channels 71 into a continuous converged air duct 72 extending along the overall length of the station layer. At the end of the converged air duct 72, that is, at the exposed exhaust port of the outermost positioning fixture 2, a centralized air outlet 74 is provided, and a flange can be fixedly connected to the air outlet 74. The heat exhaust device 7 is installed in the cabinet at the bottom of the frame 1. A low-noise centrifugal fan is preferably used as the exhaust power source. The inlet of the centrifugal fan is sealed to the outlet 74 of the main air duct 72 via a connecting pipe. This connecting pipe is made of high-temperature resistant tin foil corrugated pipe or other flexible heat-resistant tubing to accommodate installation deviations and withstand continuous exhaust of hot air. The outlet 74 of the centrifugal fan is led to the outside of the equipment via a pipe, which can be connected to the main exhaust duct of the workshop or directly discharged outdoors. During the batch aging test of the hair straighteners, the heat exhaust device 7 is continuously powered on and operates. The rotating impeller of the centrifugal fan creates a stable negative pressure suction force within the main air duct 72 and each level of exhaust duct 71, drawing the heat continuously emitted by each tested hair straightener after power-on into the fixture exhaust duct 71 as hot air through the vent near the limiting slot 21. This heat then flows into the main air duct 72 and is finally forcibly extracted to the outside of the equipment by the fan via the connecting pipe. In this way, the heat generated by the aging of the hair straightener is captured at the source and dissipated immediately, completely preventing the unorganized diffusion and accumulation of heat into the test chamber 14. This solves the problem of the continuously rising ambient temperature inside the test chamber caused by multiple products heating up simultaneously, eliminates the serious interference of ambient heat radiation on the non-contact infrared temperature measurement module 4, and ensures that the infrared radiation received by the temperature probe mainly comes from the heating surface of the tested product rather than the surrounding high-temperature environment, thereby significantly improving the accuracy and data reliability of dynamic temperature measurement during the aging process.

[0025] In one possible implementation, the clamping mechanism 3 includes a clamping cylinder 31 and an insulating pressure head 32. The piston rod end of the clamping cylinder 31 is connected to the insulating pressure head 32, and the insulating pressure head 32 is directly opposite the limiting groove 21.

[0026] In one possible implementation, speed control valves 33 are provided at both ends of the air inlet and air outlet passages of the clamping cylinder 31.

[0027] Combined with reference Figure 3 As shown, in this embodiment, the clamping mechanism 3 applies a vertically downward clamping force to the product after the straightener is inserted into the contoured limiting groove 21 of the positioning fixture 2. This ensures that the product will not shift or loosen during the aging test, which lasts for several hours, due to minor vibrations of the equipment itself, environmental disturbances, or thermal deformation of the product casing. The clamping mechanism 3 includes a clamping cylinder 31 and an insulating pressure head 32. The clamping cylinder 31 is a double-acting cylinder, and its cylinder body is vertically fixed downward on the horizontal mounting surface of the frame 1 by a flange or nut. The piston rod extends vertically downward through the mounting hole. The selection of the clamping cylinder 31 takes into account the required clamping force, ensuring that it provides sufficient clamping force without damaging the product casing due to excessive torque. The piston rod end of the clamping cylinder 31 is machined with external or internal threads and is fixed to the connection part of the insulating pressure head 32 by a threaded connection. The insulating pressure head 32 is made of engineering plastic or silicone-based materials with excellent insulation properties and a certain degree of flexibility, preferably silicone. Its overall shape is cylindrical or square, with a flat pressing surface at the bottom and a pre-embedded metal threaded insert or threaded hole at the center of the top surface for reliable connection to the end of the cylinder piston rod. One-way speed control valves 33 are connected in series on both the inlet and outlet ports of the pressing cylinder 31. These valves are screwed directly into the two ports of the cylinder. By adjusting the throttle knob on the speed control valve 33, the gas flow rate during cylinder extension and retraction can be controlled separately, thereby independently adjusting the piston rod's downward and retraction speeds. In actual operation, adjusting the downward speed to a slower level allows the insulating pressure head 32 to descend smoothly and evenly to contact the product surface, achieving flexible pressing and avoiding rapid impact. The pressing force is indirectly set by controlling the air source output pressure through a pressure regulating valve, thus generating sufficient pressing force while ensuring the safety of the product casing.

[0028] The insulating pressure head 32 is positioned directly over the pre-set pressing area of ​​the contour-limiting groove 21 of the positioning fixture 2. This area is typically located at the rear end of the straightener's handle or on a non-heating part of the body with high structural strength, avoiding the heat-generating comb teeth area and decorative parts. This ensures that the infrared temperature measurement module's view of the core heat-generating area is not obstructed during pressing, and that the product's exterior parts are not damaged due to localized force. When the operator places the straightener into the limiting groove 21 and presses the start button for the corresponding station, the pressing cylinder 31 extends, the insulating pressure head 32 descends and presses the product. The magnetic switch on the cylinder detects the piston's position and outputs a signal. Upon receiving this signal, the main control module determines that pressing is complete and then controls the power supply circuit to begin aging timing and various parameter checks. After the aging test is completed, the main control module controls the solenoid reversing valve of the pressing cylinder 31 to reverse, the cylinder piston rod retracts, the insulating pressure head 32 rises and resets, and the operator can then remove the product.

[0029] In one possible implementation, the non-contact infrared temperature measurement module 4 includes a probe bracket 41 and an infrared temperature measurement probe 42 mounted on the probe bracket 41. The probe bracket 41 is mounted above the test station layer 11. The temperature measuring end of the infrared temperature measurement probe 42 is vertically downward and maintains a preset fixed distance from the heating surface of the straightening comb in the limiting groove 21.

[0030] Combined with reference Figure 2 and Figure 3 As shown, in this embodiment, the non-contact infrared temperature measurement module 4 is used to collect surface temperature data of the heated area of ​​the tested product in a non-contact manner during the aging test of the hair straightener, and transmit the temperature signal to the main control module for analysis and recording. This module includes two main parts: a probe bracket 41 and an infrared temperature measurement probe 42. The probe bracket 41, as the fixed support structure for the infrared temperature measurement probe 42, is made of rigid metal material, preferably aluminum alloy or stainless steel sheet, formed by laser cutting, bending, welding, or bolt assembly. Its overall structure has sufficient rigidity and stability to ensure that it will not deform or loosen under long-term operation and multi-station vibration environments. The bottom of the probe bracket 41 is fixedly mounted on the mounting panel of the test station layer 11 by bolts. Its vertical support extends upward to a certain height, forming a horizontal cantilever or platform structure. The horizontal position of this cantilever or platform is precisely aligned with the contoured limiting groove 21 of the positioning fixture 2 below in the vertical direction. The probe bracket 41 has multiple probe mounting holes on its horizontal cantilever or platform, the inner diameter of which matches the outer diameter of the infrared temperature probe 42. The infrared temperature probe 42 is locked and fixed in the mounting holes of the probe bracket 41 by its own mounting nuts or retaining rings. During installation, the cylindrical outer shell of the probe is inserted from above or below the mounting hole, and the probe is clamped and fixed to the probe bracket 41 by tightening the two locking nuts located on the upper and lower sides of the mounting hole, respectively.

[0031] The infrared temperature probe 42 employs an industrial-grade non-contact infrared temperature sensor, integrating an infrared detection element, signal amplification and conditioning circuit, and a linearization processing unit. It connects to the main control module via a communication interface. The probe's temperature-sensing end is its front-end optical window, typically made of infrared-transmitting material. The internal infrared detection element receives infrared energy radiated from the surface of the object being measured through this window. After installation, the infrared temperature probe 42's temperature-sensing end, i.e., the optical window end, is vertically downward, directly facing the core area of ​​the straightener's heating surface within the contoured limiting groove 21 of the positioning fixture 2. The core area of ​​the heating surface is typically the planar area containing the straightener's heating comb teeth or metal heating plate. After the straightener is inserted into the limiting groove 21, this area is horizontally upward, directly aligned with the probe's vertically downward temperature-sensing field of view. The probe's optical axis is perpendicular to the heating surface plane, ensuring maximum infrared radiation reception efficiency.

[0032] In one possible implementation, each of the test units 12 corresponds to an independent power supply circuit, and the power supply circuit is provided with a power supply interface that matches the hair straightener. The electrical parameter detection module 5 includes a current detection unit connected in series in the power supply circuit and a voltage detection unit connected in parallel in the power supply circuit, used to determine the short circuit, open circuit and power abnormality of the hair straightener.

[0033] Specifically, each test unit 12 is equipped with a completely independent power supply circuit. The power input terminal of each power supply circuit is connected in parallel to the output terminal of the main power busbar of the whole machine or the switching power supply. The on / off control is achieved by independent relays or solid-state switches, realizing independent connection and disconnection of power supply for each station. The stations are electrically isolated from each other and do not interfere with each other. The output terminal of each power supply circuit is equipped with a power supply interface that matches the power plug of the hair straightener under test. This power supply interface is usually a female connector consistent with the hair straightener product, such as a DC round hole socket, USB socket, or AC two-hole socket, etc., and is fixedly installed on the side of the positioning fixture 2 or on the panel of the test station layer 11, so that the operator can directly insert the power cord plug of the hair straightener. The electrical parameter detection module 5 is integrated in this power supply circuit, including a current detection unit connected in series with the power supply circuit and a voltage detection unit connected in parallel with the power supply circuit. The current detection unit can be a Hall current sensor or a precision sampling resistor, connected in series in the live wire or positive line of the power supply circuit. Its output signal is amplified and filtered by the conditioning circuit and sent to the analog input channel of the main control module to reflect the working current value in the circuit in real time. The voltage detection unit is connected between the voltage output terminal of the power supply interface and the reference ground via a parallel resistor voltage divider network or an isolated voltage sensor. Its output signal is also sent to the main control module to reflect the working voltage value applied to the straightener in real time. The main control module continuously monitors and analyzes the real-time collected voltage and current values. When the current value suddenly increases above the preset short-circuit threshold, a short-circuit fault is determined. When the current value remains at or near zero and the voltage output is normal, an open-circuit fault is determined. When the actual power deviates from the preset upper or lower limits of the product's rated power range, the product's power is determined to be out of tolerance. Once the above-mentioned short-circuit, open-circuit, or power out-of-tolerance abnormal states are identified, the main control module immediately cuts off the power supply circuit of the faulty station by controlling the relay, triggers an audible and visual alarm, and displays the abnormal station number and fault type on the human-machine interface touch screen.

[0034] In one possible implementation, the rack 1 has a storage cabinet 13 and a test chamber 14, the test station layer 11 is disposed in the test chamber 14, and the heat dissipation device 7 is installed in the storage cabinet 13.

[0035] Specifically, the frame 1, serving as the load-bearing skeleton of the entire machine, is structurally divided into two independent yet interconnected spatial areas: the lower storage cabinet 13 and the upper test chamber 14. The storage cabinet 13, located below the frame 1, is a closed or semi-closed cabinet structure made of bent and welded metal sheets. Its internal space is used to install and house electrical control devices and the heat dissipation device 7. The cabinet has an openable and closable door on the front or back, with ventilation louvers for air intake or heat dissipation from the heat dissipation device 7. Electrical components such as the main control module, power module, relay group, and terminal blocks are uniformly installed on an electrical mounting plate inside the storage cabinet 13, with neat wiring and clear separation of strong and weak current circuits for convenient centralized maintenance and repair. The centrifugal fan of the heat dissipation device 7 is also bolted to the base or partition inside the storage cabinet 13, making full use of the lower space of the cabinet, lowering the center of gravity of the equipment, and ensuring stable operation of the entire machine. The test chamber 14 is located above the frame 1 and consists of a profile frame and an outer panel, forming a relatively enclosed test operation space. The test station layer 11 is horizontally installed inside the test chamber 14, and the test units 12 are arranged in an array inside the test chamber 14. The front of the test chamber 14 is the operation surface, equipped with a human-machine interface touch screen and operation panels for each station. Cable inlets and outlets can be opened on the back or side, and a three-color alarm light is installed on the top. The storage cabinet 13 is connected to the test chamber 14 by a partition or directly. The air outlet 74 of the combined air duct 72 passes down through the partition into the storage cabinet 13 through a connecting pipe and connects to the air inlet of the centrifugal fan.

[0036] In one possible implementation, the rack 1 is provided with two test station layers 11, and each test station layer 11 is arranged vertically and horizontally.

[0037] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" 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 application 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0038] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An automatic aging and temperature testing device for hair straighteners, comprising a frame and at least one testing station layer disposed on the frame, wherein the testing station layer is arranged in a horizontal array with multiple sets of independent testing units, characterized in that, Each of the aforementioned test units includes: A positioning fixture is fixed on the test station layer and has a limiting groove that matches the shape of the straight hair comb to be tested. A clamping mechanism is provided on the side of the positioning fixture and is used to clamp and fix the straightening comb that is inserted into the limiting groove. A non-contact infrared temperature measurement module is set next to the positioning fixture, with its temperature measuring end facing the heating area of ​​the straight hair comb in the limiting groove, for real-time collection of heating temperature data; The electrical parameter detection module is used to collect the working voltage and current data of the hair straightener during the aging process in real time. The timing module is used to automatically start timing after the clamping is in place and the power supply is turned on, and to automatically cut off the power supply to the corresponding station when the preset aging time is reached. The device also includes a main control module and a heat dissipation device. The main control module is electrically connected to the pressing mechanism, infrared temperature measurement module, electrical parameter detection module, timing module and heat dissipation device respectively, and is used to control the testing process, collect and process test data, and perform protection actions when parameters are abnormal. The heat dissipation device is set in the frame and is used to dissipate heat from inside the device.

2. The automatic aging and temperature measuring device for hair straighteners according to claim 1, characterized in that, The positioning fixture has an exhaust channel inside. The exhaust channels of all positioning fixtures on the same test station layer are interconnected to form a converged air duct extending along the length of the station layer. The end of the converged air duct is provided with an air outlet. The heat dissipation device is connected to the air outlet through a connecting pipe to extract the heat emitted by the straightening combs in each positioning fixture to the outside of the equipment in real time.

3. The automatic aging and temperature measuring device for hair straighteners according to claim 1, characterized in that, The clamping mechanism includes a clamping cylinder and an insulating pressure head. The piston rod end of the clamping cylinder is connected to the insulating pressure head, which is directly opposite the limiting groove.

4. The automatic aging and temperature measuring device for hair straighteners according to claim 3, characterized in that, The inlet and outlet air passages of the clamping cylinder are both equipped with speed regulating valves.

5. The automatic aging and temperature measuring device for hair straighteners according to claim 1, characterized in that, The non-contact infrared temperature measurement module includes a probe bracket and an infrared temperature measurement probe mounted on the probe bracket. The probe bracket is set above the test station layer. The temperature measuring end of the infrared temperature measurement probe is vertically downward and maintains a preset fixed distance from the heating surface of the straightening comb in the limiting groove.

6. The automatic aging and temperature measuring device for hair straighteners according to claim 1, characterized in that, Each of the aforementioned test units corresponds to an independent power supply circuit, and the power supply circuit is equipped with a power supply interface that matches the hair straightener; The electrical parameter detection module includes a current detection unit connected in series in the power supply circuit and a voltage detection unit connected in parallel in the power supply circuit, used to determine the short circuit, open circuit and power abnormality of the hair straightener.

7. The automatic aging and temperature measuring device for hair straighteners according to claim 1, characterized in that, The rack has a storage cabinet and a test chamber. The test station layer is located in the test chamber, and the heat dissipation device is installed in the storage cabinet.

8. The automatic aging and temperature measuring device for hair straighteners according to claim 1, characterized in that, The frame has two test station layers, and each test station layer is arranged vertically and horizontally.

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