Portable range hood electrical detection box

Abstract

The utility model relates to the technical field of electrical detection, and especially relates to a portable range hood electrical detection box comprising a housing; the sensor wiring terminal area, the relay socket mounting area and the information display area are arranged on the surface of the shell; the main control circuit board, the power supply assembly, the battery compartment and the communication assembly are arranged in the shell and are electrically connected with one another; the master control circuit board is provided with a single-chip microcomputer assembly, a sensor input assembly and a relay detection assembly which are electrically connected with one another. The sensor wiring terminal area is electrically connected with the sensor input assembly, the relay socket installation area is electrically connected with the relay detection assembly, and the communication assembly is electrically connected with the single-chip microcomputer assembly and the signal display area. The power supply assembly comprises a detachable lithium battery and a DC-DC boosting assembly, and the lithium battery is installed in the battery bin through a sliding rail structure. According to the utility model, the technical problems of failure detection, low maintenance efficiency and high maintenance cost in the equipment field in the prior art are solved.

Description

Technical Field

[0001] This utility model relates to the field of electrical testing technology, and in particular to a portable electrical testing box for a smoke machine. Background Technology

[0002] In the routine maintenance of electrical equipment in tobacco hoods, maintenance personnel typically need to perform functional tests on key components such as sensors and relays to locate faults. Currently, due to the lack of rapid and accurate methods for determining component status, maintenance personnel generally employ a replacement-based repair method. This involves disassembling suspected faulty components and replacing them with new ones of the same model. This approach increases maintenance costs, and there's a possibility that the new parts may be of the wrong model or damaged, leading the maintenance process in the wrong direction, artificially increasing the difficulty of maintenance, and reducing efficiency.

[0003] Therefore, there is an urgent need for a portable electrical testing box for tobacco machinery that has a simple structure and can detect faults in tobacco machinery equipment. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a portable electrical testing item for range hoods, which solves the technical problems of the inability to detect faults and high maintenance costs in the prior art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] This utility model embodiment provides a portable electrical testing box for tobacco hoods, comprising:

[0009] Housing; sensor wiring terminal area, relay socket mounting area and information display area set on the surface of the housing; main control circuit board, power supply assembly, battery compartment and communication assembly that are electrically connected inside the housing;

[0010] The main control circuit board is equipped with a microcontroller component, a sensor input component, and a relay detection component that are electrically connected to each other.

[0011] The sensor terminal block area is electrically connected to the sensor input component, the relay socket mounting area is electrically connected to the relay detection component, and the communication component is electrically connected to the microcontroller component and the signal display area.

[0012] The power supply assembly includes a removable lithium battery and a DC-DC boost converter. The lithium battery is mounted in the battery compartment via a sliding rail structure.

[0013] Optionally, the sensor terminal area is a three-core connector, including:

[0014] 24V input terminal, ground terminal, and sensor signal output terminal;

[0015] The 24V input terminal is electrically connected to the power supply node of the sensor input component, and the signal output terminal is connected to the signal acquisition node of the sensor input component.

[0016] Optionally, the sensor input component includes an NPN detection branch and a PNP detection branch that are mirror-symmetric and connected in parallel;

[0017] The NPN detection branch includes: a first optocoupler, a second optocoupler, a first resistor, a third resistor, and a fifth resistor;

[0018] The 24V input terminal is electrically connected to the anode of the first optocoupler via the first resistor. The cathode of the first optocoupler is electrically connected to the collector of the second optocoupler. The collector of the first optocoupler is electrically connected to the microcontroller assembly. The emitter of the first optocoupler is grounded. One end of the third resistor is connected to the power supply assembly, and the other end is connected between the collector of the first optocoupler and the microcontroller assembly.

[0019] The anode of the second optocoupler is electrically connected to the communication component through the fifth resistor, the cathode of the second optocoupler is grounded, and the emitter of the second optocoupler is electrically connected to the PNP detection branch.

[0020] The sensor signal output terminal is electrically connected between the emitter of the second optocoupler and the PNP detection branch.

[0021] Optionally, the relay detection component includes:

[0022] The coil detection circuit and four sets of parallel contact detection branches are respectively electrically connected to the relay socket mounting area.

[0023] The coil detection circuit includes: a push-button switch, a first current-limiting resistor, a coil status indicator light, and a Zener diode;

[0024] One end of the push-button switch is electrically connected to the fifth terminal of the relay socket mounting area, and the other end is connected in series with the coil status indicator light and then electrically connected to the power supply component.

[0025] The first current-limiting resistor is connected in parallel across the coil status indicator light, and the Zener diode is connected in parallel between the fifth and sixth terminals of the relay socket mounting area.

[0026] Optionally, each contact detection branch includes a current-limiting resistor and a contact status indicator light;

[0027] In each contact detection branch, the contact status indicator light is electrically connected to the first, second, third and fourth terminals of the relay socket installation area, respectively, and the current limiting resistor is electrically connected to the power supply component.

[0028] Optionally, the information display area includes:

[0029] The NPN status indicator branch consists of an NPN status indicator and a second current-limiting resistor connected in series. The anode of the NPN status indicator is connected to pin 28 of the microcontroller component, and the cathode is grounded through the second current-limiting resistor.

[0030] The PNP status indicator branch consists of a PNP status indicator and a third current-limiting resistor connected in series. The anode of the PNP status indicator is connected to pin 27 of the microcontroller component, and the cathode is grounded through the third current-limiting resistor.

[0031] Optionally, the information display area further includes:

[0032] The dual-color power indicator branch consists of a dual-color indicator, a fourth current-limiting resistor, and a fifth current-limiting resistor connected in series. The dual-color indicator includes a red light-emitting terminal and a green light-emitting terminal.

[0033] The anode of the red light-emitting end is connected to pin 25 of the microcontroller component via the fourth current-limiting resistor, the anode of the green light-emitting end is connected to pin 26 of the microcontroller component via the fifth current-limiting resistor, and the cathodes of the red and green light-emitting ends are grounded.

[0034] Optionally, the surface of the housing is further provided with an extended communication interface; the communication component is a MAX232 communication chip.

[0035] Pins 13 and 14 of the MAX232 communication chip are connected to the extended communication interface on the surface of the housing, and pins 11 and 12 of the MAX232 communication chip are electrically connected to pins 19 and 22 of the microcontroller component.

[0036] Optionally, the information display area further includes:

[0037] Touch buttons, LED display screen, and buzzer alarm;

[0038] The touch buttons, LED display screen, and buzzer alarm are all electrically connected to the communication component.

[0039] Optionally, an electromagnetic shielding assembly is further provided inside the housing, the electromagnetic shielding assembly comprising:

[0040] A metal isolation layer is placed between the main control circuit board and the power supply assembly;

[0041] A magnetic ring filter is fitted onto the input cable in the sensor terminal area.

[0042] A grounded copper foil layer covers the inner wall of the battery compartment and is grounded.

[0043] (III) Beneficial Effects

[0044] The beneficial effects of this utility model are as follows: This portable electrical testing box for range hoods achieves high efficiency and portability through integrated hardware design. The internal casing features a layered layout of the main control circuit board, power supply components, and communication components, optimizing space utilization. The external design of the sensor wiring terminal area and relay socket mounting area facilitates quick connection to the device under test, while the information display area provides real-time status feedback. The power supply component combines a removable lithium battery with a DC-DC boost converter, balancing battery life and voltage stability. The sliding battery compartment design further simplifies battery replacement. The main control circuit board centrally controls the sensor input components and relay detection components via a microcontroller, achieving hardware synergy for multi-functional testing and significantly improving testing efficiency and equipment reliability. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of a portable electrical testing box for a tobacco appliance according to the present invention;

[0046] Figure 2 This is a diagram of the internal structure of a microcontroller component.

[0047] Figure 3 Internal circuit diagram of the sensor input component;

[0048] Figure 4 This is the internal circuit diagram of the power supply component;

[0049] Figure 5 This is the internal circuit diagram of the relay detection component;

[0050] Figure 6 This is the internal circuit diagram of the information display area;

[0051] Figure 7 This is a diagram of the internal structure of the communication component.

[0052] [Explanation of Labels in the Attached Image]

[0053] 1: Housing; 2: Information display area; 3: Main control circuit board; 4: Power supply assembly; 5: Communication assembly; 6: Microcontroller assembly; 7: Sensor input assembly; 8: Relay detection assembly; 9: Expansion communication interface;

[0054] J1: Sensor terminal block area; J1-1: 24V input terminal; JI-2: Grounding terminal; JI-3: Sensor signal output terminal; J3: Relay socket mounting area;

[0055] U1: First optocoupler; U2: Second optocoupler; U3: Third optocoupler; U4: Fourth optocoupler; U6: DC-DC boost converter;

[0056] D1: NPN status indicator; D2: Dual-color indicator; D3: PNP status indicator; D4: Coil status indicator; D5: First contact status indicator; D6: Second contact status indicator; D7: Third contact status indicator; D8: Fourth contact status indicator; D9: Zener diode;

[0057] S1: First switch; S2: Push-button switch;

[0058] R1: First resistor; R2: Second resistor; R3: Third resistor; R4: Fourth resistor;

[0059] R7: Seventh resistor; R12: Twelfth resistor;

[0060] R18: First current-limiting resistor; R8: Second current-limiting resistor; R9: Third current-limiting resistor; R10: Fourth current-limiting resistor; R11: Fifth current-limiting resistor;

[0061] R14: Sixth current-limiting resistor; R15: Seventh current-limiting resistor; R16: Eighth current-limiting resistor; R17: Ninth current-limiting resistor;

[0062] DS1: Power display device; BT1: Lithium battery. Detailed Implementation

[0063] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0064] This utility model addresses the technical problems of low efficiency and high cost in sensor and relay fault detection during cigarette equipment maintenance. It proposes a portable electrical testing box for cigarette machines. This box integrates a sensor terminal block area, a relay socket installation area, and an information display area within its casing. Internally, a main control circuit board with a microcontroller component works in conjunction with sensor input components and relay detection components. This utility model's electrical testing box can achieve core functions such as sensor good / badness determination, category identification, and contact status detection, improving on-site maintenance efficiency and reducing misjudgment rates. It possesses technical advantages such as compact structure, strong anti-interference capabilities, and comprehensive testing capabilities.

[0065] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0066] Example 1

[0067] See Figure 1 A portable electrical testing box for a range hood, according to this embodiment, includes:

[0068] Housing 1; sensor wiring terminal area J1, relay socket mounting area J3 and information display area 2 are set on the surface of the housing; main control circuit board 3, power supply assembly 4, battery compartment and communication assembly 5 are set inside the housing and are electrically connected to each other;

[0069] The main control circuit board 3 is equipped with a microcontroller component 6, a sensor input component 7, and a relay detection component 8 that are electrically connected to each other; the structure of the microcontroller component 6 is as follows: Figure 2 As shown.

[0070] The main control circuit board 3 uses a 4-layer FR4 board with a star-shaped ground plane on the inner layer. The grounding pin of the microcontroller component 6 is connected to this star-shaped ground plane.

[0071] The sensor terminal block area J1 is electrically connected to the sensor input component 7, and the relay socket mounting area J3 is electrically connected to the relay detection component 8. The communication component 5 is electrically connected to the microcontroller component 6 and the signal display area 2.

[0072] The power supply assembly 4 includes a detachable lithium battery BT1 and a DC-DC boost assembly U6. The lithium battery BT1 is installed in the battery compartment via a sliding rail structure.

[0073] The shell 1 is divided into an upper shell and a lower shell that interlock with each other. The surface of the upper shell is divided into:

[0074] Left operating area: Set sensor wiring terminal area J1, which is a three-core connector with three ports;

[0075] Central testing area: Set up relay socket installation area J3, where relay socket installation area J3 is two pluggable 8-pin relay sockets;

[0076] Right side display area: Set signal display area 2, which includes NPN status indicator D1, PNP status indicator D3, dual-color indicator D2, coil status indicator D4, first contact status indicator D5, second contact status indicator D6, third contact status indicator D7, and fourth contact status indicator D8.

[0077] The upper housing contains a main control circuit board 3 and a communication component 5, which are fixed inside the upper housing by four corner studs.

[0078] The lower housing contains a power supply assembly 4 and a battery compartment, which has a built-in mounting slot for the lithium battery BT1 with a sliding rail structure.

[0079] The layered layout optimizes space utilization and reduces signal interference through physical isolation. Furthermore, the interlocking upper and lower housings allow for rapid maintenance should a fault occur inside the electrical testing box, ensuring its normal operation and meeting the high-intensity usage requirements of the testing equipment in the cigarette manufacturing environment.

[0080] Example 2

[0081] This embodiment provides a portable electrical testing box for cigarette equipment, used for testing cigarette manufacturing equipment, including:

[0082] Housing 1; sensor wiring terminal area J1, relay socket mounting area J3 and information display area 2 are set on the surface of the housing; main control circuit board 3, power supply assembly 4, battery compartment and communication assembly 5 are set inside the housing and are electrically connected to each other;

[0083] The main control circuit board 3 is equipped with a microcontroller component 6, a sensor input component 7, and a relay detection component 8 that are electrically connected to each other;

[0084] The sensor terminal block area J1 is electrically connected to the sensor input component 7, and the relay socket mounting area J3 is electrically connected to the relay detection component 8, the communication component 5 is electrically connected to the microcontroller component 6 and the signal display area 2;

[0085] The power supply assembly 4 includes a removable lithium battery BT1 and a DC-DC boost assembly U6. The lithium battery BT1 is installed in the battery compartment via a sliding rail structure.

[0086] The DC-DC boost converter U6 uses the TPS61040 chip. The battery compartment houses a built-in wireless charging receiver coil, a WPC-Qi 15W standard module with a 40mm diameter, connected in parallel with the lithium battery BT1 via an LTC4120 chip. The slide rail structure uses POM plastic guide rails with V-shaped guide grooves (1.2mm deep, 60° angle) on the surface, forming a reverse-insertion-proof fit with the raised structure of the lithium battery BT1 casing.

[0087] In this embodiment, the internal connections of the power supply component 4 are as follows: Figure 4 As shown, the lithium battery BT1 is a 3.7V lithium battery BT1. This voltage supplies power to the portable smoke machine electrical detection box through the first switch S1. The power level of the power supply component 4 is displayed through the power display device DS1. After being converted by the DC-DC boost component U6, it independently outputs a stable DC voltage of 24V.

[0088] In this embodiment, the sensor terminal block J1 is a three-core connector, including:

[0089] 24V input terminal JI-1, ground terminal JI-2, and sensor signal output terminal JI-3;

[0090] The 24V input terminal is electrically connected to the power supply node of the sensor input component 7. This port is responsible for drawing 24V DC power from the power supply component 4 to provide the necessary power support. By directly connecting to the power supply node of the sensor input component 7, the stability and efficiency of power transmission are ensured, and the impact of voltage drop or current fluctuations on the sensor input component 7 is reduced.

[0091] The signal output terminal is connected to the signal acquisition node of the sensor input component 7;

[0092] Grounding terminal J1-2 provides an important guarantee for the safe operation of electrical equipment. It can not only effectively prevent the accumulation of static electricity, but also avoid damage to electronic equipment due to overvoltage caused by circuit faults. Grounding terminal J1-2 is connected to the common ground of the portable tobacco machine electrical test box to ensure that the potential reference point between circuits is consistent and to guarantee the reliability of signals.

[0093] In this embodiment, the sensor input component 7 includes an NPN detection branch and a PNP detection branch that are mirror-symmetric and connected in parallel, such as... Figure 3 As shown,

[0094] The NPN detection branch includes: a first optocoupler U1, a second optocoupler U2, a first resistor R1, a third resistor R3, and a fifth resistor R5;

[0095] The 24V input terminal JI-1 is electrically connected to the anode of the first optocoupler U1 via the first resistor R1. The cathode of the first optocoupler U1 is electrically connected to the collector of the second optocoupler U2. The collector of the first optocoupler U1 is electrically connected to the microcontroller assembly 6. The emitter of the first optocoupler U1 is grounded. One end of the third resistor R3 is connected to the lithium battery BT1 of the power supply assembly 4, and the other end is connected between the collector of the first optocoupler U1 and the microcontroller assembly 6.

[0096] The anode of the second optocoupler U2 is electrically connected to the communication component 5 through the fifth resistor R5, the cathode of the second optocoupler U2 is grounded, and the emitter of the second optocoupler U2 is electrically connected to the PNP detection branch.

[0097] The sensor signal output terminal JI-3 is electrically connected between the emitter of the second optocoupler U2 and the PNP detection branch.

[0098] Specifically, the first optocoupler U1, as a key component for signal isolation and transmission, has its anode connected to the 24V input terminal J1-1 via the first resistor R1, and its cathode electrically connected to the collector of the second optocoupler U2, forming part of the current path. The collector of the first optocoupler U1 is connected to the microcontroller component 6 for sending detection signals to the microcontroller; its emitter is directly grounded.

[0099] The third resistor R3 is connected at one end to the lithium battery BT1 of the power supply component 4, and at the other end to the collector of the first optocoupler U1 and the microcontroller component 6, which serves to limit current and protect the circuit from overcurrent damage.

[0100] The fifth resistor R5 is connected between the anode of the second optocoupler U2 and the communication component 5 to adjust the current entering the second optocoupler U2, ensuring the stability and accuracy of signal transmission.

[0101] Furthermore, the second optocoupler U2 not only participates in the NPN detection branch but also connects to the PNP detection branch through its emitter, enabling interaction between the two types of detection branches. The sensor signal output terminal J1-3 is connected between the emitter of the second optocoupler U2 and the PNP detection branch, thereby integrating information from both the NPN and PNP detection branches and transmitting it to the subsequent communication component 5.

[0102] In the sensor input component 7, if the first optocoupler U1 has a signal, it indicates that the sensor under test is an NPN type; if the third optocoupler U3 has a signal, it indicates that the sensor under test is a PNP type; if the signals of the first optocoupler U1 and the third optocoupler U3 are pulse signals, it indicates that the sensor under test is a self-diagnostic sensor.

[0103] By employing both NPN and PNP detection branches, the types of sensors can be detected more comprehensively, improving the adaptability and comprehensiveness of the electrical testing box.

[0104] Further, see Figure 5 The relay detection component 8 in this embodiment includes:

[0105] The coil detection circuit and four sets of parallel contact detection branches are electrically connected to the relay socket mounting area J3.

[0106] The coil detection circuit includes: push-button switch S2, first current-limiting resistor R18, coil status indicator D4, and Zener diode D9;

[0107] One end of the push-button switch S2 is electrically connected to the fifth terminal of the relay socket mounting area J3, and the other end is connected in series with the coil status indicator D4 and then electrically connected to the DC-DC boost module U6 of the power supply component 4.

[0108] The first current-limiting resistor R18 is connected in parallel across the coil status indicator D4, and the Zener diode D9 is connected in parallel between the fifth and sixth terminals of the relay socket mounting area J3.

[0109] In the four parallel contact detection circuits, each contact detection branch includes a current-limiting resistor and a contact status indicator light.

[0110] like Figure 5 As shown, the current-limiting resistors in the four sets of contact detection circuits are the sixth current-limiting resistor R14, the seventh current-limiting resistor R15, the eighth current-limiting resistor R16, and the ninth current-limiting resistor R17, respectively. The contact status indicator lights are the first contact status indicator light D5, the second contact status indicator light D6, the third contact status indicator light D7, and the fourth contact status indicator light D8, respectively.

[0111] In each contact detection branch, the contact status indicator light is electrically connected to the first, second, third and fourth terminals of the relay socket installation area, respectively, and the current limiting resistor is electrically connected to the lithium battery BT1 in the power supply assembly 4.

[0112] In practical use, the relay is energized by observing the coil status indicator D4. The first current-limiting resistor R18 is connected in parallel across the coil status indicator D4 to limit the current flowing through the indicator and prevent damage to the indicator due to excessive current. The Zener diode D9 is connected in parallel between the fifth and sixth terminals of the relay socket mounting area J3 to provide overvoltage protection and prevent damage caused by the voltage on the relay coil exceeding the safe value.

[0113] With the above settings, users can intuitively understand the working status of the relay through the push-button switch S2 and various status indicator lights, which facilitates fault diagnosis and daily maintenance.

[0114] In this embodiment, see Figure 6 Information display area 2 includes:

[0115] The NPN status indicator branch consists of NPN status indicator D1 and second current limiting resistor R8 connected in series. The anode of NPN status indicator D1 is connected to pin 28 of microcontroller component 6, and the cathode is grounded through the second current limiting resistor R8.

[0116] The PNP status indicator branch consists of PNP status indicator D3 and third current limiting resistor R9 connected in series. The anode of PNP status indicator D3 is connected to pin 27 of microcontroller component 6, and the cathode is grounded through third current limiting resistor R9.

[0117] The dual-color power indicator branch consists of a dual-color indicator D2, a fourth current-limiting resistor R10, and a fifth current-limiting resistor R11 connected in series. The dual-color indicator D2 includes a red light-emitting terminal and a green light-emitting terminal.

[0118] The anode of the red light-emitting end is connected to pin 25 of the microcontroller component 6 via the fourth current-limiting resistor R10, and the anode of the green light-emitting end is connected to pin 26 of the microcontroller component 6 via the fifth current-limiting resistor R11. The cathodes of the red and green light-emitting ends are grounded.

[0119] In information display area 2, NPN status indicator D1 and PNP status indicator D3 indicate whether the sensor is NPN or PNP, and whether it is a general-purpose sensor or a self-diagnostic sensor, respectively. The dual-color indicator D2 includes a red and a green light-emitting end. The anode of the red light-emitting end is connected to pin 25 of the microcontroller component 6 via a fourth current-limiting resistor R10, and the cathode is grounded. When the microcontroller sends a control signal to pin 25, the red light-emitting end is activated, indicating an error state or other situations requiring user attention. The anode of the green light-emitting end is connected to pin 26 of the microcontroller component 6 via a fifth current-limiting resistor R11, and the cathode is also grounded. When pin 26 receives a control signal, the green light-emitting end illuminates, typically indicating normal operation or readiness, etc.

[0120] In this embodiment, different colored indicator lights are used to distinguish various states, enabling users to quickly understand the current status of the system, greatly improving the user experience. At the same time, clear status indicators help technicians quickly locate the problem, reduce troubleshooting time, and improve maintenance efficiency.

[0121] Specifically, the surface of the housing 1 is also provided with an extended communication interface 9;

[0122] Communication component 5 is a MAX232 communication chip, such as Figure 7 As shown.

[0123] Pins 13 and 14 of the MAX232 communication chip are connected to the extended communication interface 9 on the surface of the housing, and pins J1 and 12 of the MAX232 communication chip are electrically connected to pins 19 and 22 of the microcontroller component 6.

[0124] Furthermore, the information display area 2 also includes:

[0125] Touch buttons, LED display screen, and buzzer alarm;

[0126] The touch buttons, LED display screen, and buzzer alarm are electrically connected to the communication component 5.

[0127] The touch button uses capacitive touch sensing technology and consists of a touch sensing motor and a capacitance detection circuit. The touch sensing electrode is a conductive material that contacts the surface touched by the finger. When the finger approaches or touches the electrode, it causes a change in capacitance.

[0128] In addition, an electromagnetic shielding assembly is also provided inside the housing 1, which includes:

[0129] A metal isolation layer is disposed between the main control circuit board 3 and the power supply assembly 4; the metal isolation layer is located at the junction of the upper and lower shells in the middle of the electrical testing box, and its thickness is selected according to the electromagnetic shielding requirements. Furthermore, the edge of the metal isolation layer is connected to the common ground terminal of the shell 1 to achieve a good electrical connection.

[0130] A magnetic ring filter is fitted onto the input cable in the sensor terminal block J1. Specifically, the magnetic ring filter is made of a toroidal magnetic material, such as a ferrite magnetic ring. It is fitted onto the input cable in the sensor terminal block J1 by passing the cable through the central hole of the magnetic ring. The inner diameter of the magnetic ring is selected according to the diameter of the cable to ensure that the cable can pass through tightly and that the magnetic ring can effectively filter the signal in the cable.

[0131] A grounding copper foil layer is evenly covered on the inner wall of the battery compartment and connected to the common grounding terminal of the casing.

[0132] In this embodiment, all analysis and control information and processing in the portable range hood electrical testing box are implemented using existing programs. This utility model does not involve any program improvement; it simply assembles a portable range hood electrical testing box using hardware, circuits, etc.

[0133] This embodiment presents a portable electrical testing box for range hoods. It features a compact structure, high functional integration, and portability, enabling comprehensive one-stop testing of range hood equipment and reducing testing costs. The sensor terminal block design facilitates sensor connection and stable signal transmission, and its input component circuit structure is compatible with different sensors. The relay detection component can comprehensively and accurately detect relay status. The indicator light branch, touch buttons, LED display, and buzzer alarm in the information display area provide intuitive status display, convenient operation input, clear data display, and abnormal alarm functions, respectively. The communication component and extended communication interface facilitate data communication and expansion. The electromagnetic shielding component reduces electromagnetic interference, improving operational stability and testing accuracy. The removable lithium battery BT1 in the power supply component is easy to replace, and the DC-DC boost component U6 ensures the voltage requirements of all components.

[0134] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0135] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0136] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0137] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0138] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A portable electrical testing box for a smoke machine, characterized in that, include: Housing (1); sensor wiring terminal area (J1), relay socket mounting area (J3) and information display area (2) are set on the surface of the housing; main control circuit board (3), power supply assembly (4), battery compartment and communication assembly (5) are electrically connected to each other and are set inside the housing; The main control circuit board is equipped with a single-chip microcomputer component (6), a sensor input component (7), and a relay detection component (8) that are electrically connected to each other; The sensor terminal block area (J1) is electrically connected to the sensor input component (7), the relay socket mounting area (J3) is electrically connected to the relay detection component (8), and the communication component (5) is electrically connected to the microcontroller component (6) and the signal display area (2). The power supply assembly (4) includes a removable lithium battery (BT1) and a DC-DC boost assembly (U6), with the lithium battery (BT1) mounted in the battery compartment via a sliding rail structure.

2. The portable electrical testing box for a tobacco appliance according to claim 1, characterized in that, The sensor terminal block area (J1) is a three-core connector, including: 24V input terminal (JI-1), ground terminal (JI-2), and sensor signal output terminal (JI-3); The 24V input terminal is electrically connected to the power supply node of the sensor input component (7), and the signal output terminal (JI-3) is connected to the signal acquisition node of the sensor input component (7).

3. The portable electrical testing box for a tobacco appliance according to claim 2, characterized in that, The sensor input component (7) includes an NPN detection branch and a PNP detection branch that are mirror-symmetric and connected in parallel; The NPN detection branch includes: a first optocoupler (U1), a second optocoupler (U2), a first resistor (R1), a third resistor (R3), and a fifth resistor (R5); The 24V input terminal (JI-1) is electrically connected to the anode of the first optocoupler (U1) via the first resistor (R1). The cathode of the first optocoupler (U1) is electrically connected to the collector of the second optocoupler (U2). The collector of the first optocoupler (U1) is electrically connected to the microcontroller assembly (6). The emitter of the first optocoupler (U1) is grounded. One end of the third resistor (R3) is connected to the power supply assembly (4), and the other end is connected between the collector of the first optocoupler (U1) and the microcontroller assembly (6). The anode of the second optocoupler (U2) is electrically connected to the communication component (5) through the fifth resistor (R5), the cathode of the second optocoupler (U2) is grounded, and the emitter of the second optocoupler (U2) is electrically connected to the PNP detection branch. The sensor signal output terminal (JI-3) is electrically connected between the emitter of the second optocoupler (U2) and the PNP detection branch.

4. The portable electrical testing box for a tobacco appliance according to claim 2, characterized in that, The relay detection component (8) includes: The coil detection circuit and four sets of parallel contact detection branches are respectively electrically connected to the relay socket mounting area (J3). The coil detection circuit includes: a push-button switch (S2), a first current-limiting resistor (R18), a coil status indicator (D4), and a Zener diode (D9); One end of the push button switch (S2) is electrically connected to the fifth terminal of the relay socket mounting area (J3), and the other end is connected in series with the coil status indicator (D4) and then electrically connected to the power supply assembly (4); The first current-limiting resistor (R18) is connected in parallel across the coil status indicator (D4), and the Zener diode (D9) is connected in parallel between the fifth and sixth terminals of the relay socket mounting area (J3).

5. The portable electrical testing box for a tobacco appliance according to claim 4, characterized in that, Each contact detection branch includes a current-limiting resistor and a contact status indicator light; In each contact detection branch, the contact status indicator light is electrically connected to the first, second, third and fourth terminals of the relay socket installation area, and the current limiting resistor is electrically connected to the power supply component (4).

6. The portable electrical testing box for a tobacco appliance according to claim 1, characterized in that, The information display area (2) includes: The NPN status indicator branch consists of an NPN status indicator (D1) and a second current-limiting resistor (R8) connected in series. The anode of the NPN status indicator (D1) is connected to pin 28 of the microcontroller component (6), and the cathode is grounded through the second current-limiting resistor (R8). The PNP status indicator branch consists of a PNP status indicator (D3) and a third current-limiting resistor (R9) connected in series. The anode of the PNP status indicator (D3) is connected to pin 27 of the microcontroller component (6), and the cathode is grounded through the third current-limiting resistor (R9).

7. The portable electrical testing box for a tobacco appliance according to claim 6, characterized in that, The information display area (2) also includes: The dual-color power indicator branch consists of a dual-color indicator (D2), a fourth current-limiting resistor (R10), and a fifth current-limiting resistor (R11) connected in series. The dual-color indicator (D2) includes a red light-emitting terminal and a green light-emitting terminal. Among them, the anode of the red light-emitting end is connected to pin 25 of the microcontroller component (6) via the fourth current-limiting resistor (R10), the anode of the green light-emitting end is connected to pin 26 of the microcontroller component (6) via the fifth current-limiting resistor (R11), and the cathodes of the red and green light-emitting ends are grounded.

8. The portable electrical testing box for a tobacco appliance according to claim 1, characterized in that, The surface of the housing (1) is also provided with an extended communication interface (9); the communication component (5) is a MAX232 communication chip; Pins 13 and 14 of the MAX232 communication chip are connected to the extended communication interface (9) on the surface of the housing, and pins 11 and 12 of the MAX232 communication chip are electrically connected to pins 19 and 22 of the microcontroller assembly (6).

9. The portable electrical testing box for a tobacco appliance according to claim 7, characterized in that, The information display area (2) also includes: Touch buttons, LED display screen, and buzzer alarm; The touch buttons, LED display screen and buzzer alarm are electrically connected to the communication component (5).

10. The portable electrical testing box for a tobacco appliance according to claim 1, characterized in that, The housing (1) is further provided with an electromagnetic shielding assembly, which includes: A metal isolation layer is disposed between the main control circuit board (3) and the power supply assembly (4); A magnetic ring filter is fitted onto the input cable in the sensor terminal block (J1); A grounded copper foil layer covers the inner wall of the battery compartment and is grounded.

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