DC motor analog detector

Abstract

This application discloses a DC motor simulation detector for detecting air conditioner indoor units. The DC motor simulation detector includes: a voltage detection and light-emitting module, which has a voltage-regulating diode and a light-emitting element connected in series; and an oscillation module connected to the voltage detection and light-emitting module, used to generate a square wave oscillation signal simulating a DC motor. The voltage detection and light-emitting module and the oscillation module are used to connect to the main board of the air conditioner indoor unit to be tested. This application can simulate the square wave pulse signal generated when a DC motor is running normally, which can be used to quickly and accurately detect and determine the faulty components causing the air conditioner indoor unit to not blow air. This facilitates the repair of air conditioner indoor unit faults that do not blow air, reduces repair time, improves repair efficiency, and reduces repair costs.

Description

Technical Field

[0001] This application relates to the field of air conditioning fault detection technology, and more specifically, to a DC motor analog detector. Background Technology

[0002] Currently, most air conditioners use a built-in DC motor as the driving source for the fan blades in their indoor units.

[0003] However, a malfunction in the indoor unit of an air conditioner can bring many difficulties to its repair. For example, when the indoor unit fails to blow air, it may be due to a fault in the DC motor itself, or it may be due to a fault in the main board of the indoor unit, causing the DC motor to stop turning and thus preventing airflow. During the repair process, technicians often find it difficult to accurately determine whether the problem is caused by a fault in the main board or the DC motor. In such cases, if technicians directly disassemble the casing to replace the DC motor, and this fails to resolve the issue, they will need to disassemble and replace the main board as well. This causes many inconveniences for technicians when repairing indoor unit malfunctions, and the repair process is time-consuming, inefficient, and increases repair costs. Utility Model Content

[0004] The purpose of this application is to provide a DC motor simulation detector that can simulate the square wave pulse signal generated when a DC motor is running normally, so as to quickly and accurately detect and identify the faulty components that cause the indoor unit of the air conditioner to not blow air. This will facilitate maintenance personnel in repairing the fault of the indoor unit of the air conditioner not blowing air, reduce maintenance time, improve maintenance efficiency, and reduce maintenance costs.

[0005] To achieve the above objectives, this application provides a DC motor simulation detector for detecting indoor units of air conditioners, the DC motor simulation detector comprising:

[0006] A voltage detection and light-emitting module, wherein the voltage detection and light-emitting module has a Zener diode and a light-emitting element arranged in series;

[0007] An oscillation module, which is connected to the voltage detection and light-emitting module, is used to generate a square wave oscillation signal simulating a DC motor;

[0008] The voltage detection light-emitting module and the oscillation module are used to connect to the main board of the indoor unit of the air conditioner to be tested.

[0009] In the implementation of the above technical solution, when an air conditioner indoor unit fails to blow air, maintenance personnel can use this DC motor simulation detector to detect and determine the faulty component causing the air conditioner indoor unit to fail to blow air. Specifically, during maintenance, the maintenance personnel connect the voltage detection light-emitting module and oscillation module of the DC motor simulation detector to the main board of the air conditioner indoor unit to be tested. The oscillation module is used to generate a square wave oscillation signal simulating a DC motor. This square wave oscillation signal corresponds to the square wave pulse signal generated when the DC motor is running normally. By checking whether the light-emitting element of the voltage detection light-emitting module emits light and whether the air conditioner indoor unit display panel displays a fault code, it can be determined whether the fault is with the main board of the air conditioner indoor unit or the DC motor. In this way, the faulty component causing the air conditioner indoor unit to fail to blow air can be detected and determined quickly and accurately. This facilitates the maintenance personnel in repairing the air conditioner indoor unit's failure to blow air, reduces maintenance time, improves maintenance efficiency, and reduces maintenance costs.

[0010] In a preferred embodiment of this application, the voltage detection and light-emitting module includes a first voltage detection and light-emitting unit, a second voltage detection and light-emitting unit, and a third voltage detection and light-emitting unit.

[0011] The first voltage detection light-emitting unit and the second voltage detection light-emitting unit have a Zener diode and a light-emitting element connected in series, and the third voltage detection light-emitting unit has a light-emitting element;

[0012] The first voltage detection light-emitting unit is used to connect to the VDC terminal of the main board of the air conditioner indoor unit to be tested, the second voltage detection light-emitting unit is used to connect to the VCC terminal of the main board of the air conditioner indoor unit to be tested, and the third voltage detection light-emitting unit is used to connect to the VSP terminal of the main board of the air conditioner indoor unit to be tested.

[0013] In the implementation of the above technical solution, the voltage detection light-emitting module is equipped with three voltage detection light-emitting units, which are respectively used to connect to the VDC terminal, VCC terminal and VSP terminal of the air conditioner indoor unit main board. When the maintenance personnel detect and judge the faulty component that causes the air conditioner indoor unit to not blow air, they can quickly judge whether there is any abnormality in the VDC, VCC and VSP voltages supplied by the air conditioner indoor unit main board to the DC motor by observing the illumination of the three voltage detection light-emitting units. If there is an abnormality in the corresponding voltage supplied to the DC motor, the corresponding voltage detection light-emitting unit will not light up, indicating that the air conditioner indoor unit main board is faulty. This structure can more quickly and accurately detect and judge whether the faulty component that causes the air conditioner indoor unit to not blow air is the air conditioner indoor unit main board.

[0014] In a preferred embodiment of this application, the first voltage detection light-emitting unit includes a first light-emitting element, a first resistor, and a first Zener diode arranged in series.

[0015] In the implementation of the above technical solution, the circuit components of the first voltage detection light-emitting unit are relatively simple, and the detection function can be well achieved without complicated settings.

[0016] In a preferred embodiment of this application, the second voltage detection light-emitting unit includes a second light-emitting element, a second resistor, and a second Zener diode arranged in series.

[0017] In the implementation of the above technical solution, the circuit components of the second voltage detection light-emitting unit are relatively simple, and the detection function can be well achieved without complicated settings.

[0018] In a preferred embodiment of this application, the third voltage detection light-emitting unit includes a third light-emitting element and a third resistor arranged in series.

[0019] In the implementation of the above technical solution, the circuit components of the third voltage detection light-emitting unit are relatively simple, and the detection function can be well achieved without complicated settings.

[0020] In a preferred embodiment of this application, the oscillation module includes an oscillation unit, a resistor unit, and a capacitor unit, wherein the resistor unit and the capacitor unit are both connected to the oscillation unit, and the resistor unit is connected to the capacitor unit.

[0021] In the implementation of the above technical solution, the structure of the oscillation module enables the oscillation unit to stably generate a square wave oscillation signal simulating a DC motor, which better ensures the simulation of the square wave pulse signal generated during normal operation of the DC motor. This, in turn, ensures the accuracy of using this DC motor simulation detector to detect and judge the faulty components that cause the indoor unit of the air conditioner to not blow air.

[0022] In a preferred embodiment of this application, the oscillation unit is an IC555 chip.

[0023] In the implementation of the above technical solution, the oscillation unit adopts the IC555 chip, which has the advantages of high flexibility, accurate timing and simple interface. It can generate square wave oscillation signals of analog DC motors relatively stably, so as to better ensure the detection effect and accuracy.

[0024] In a preferred embodiment of this application, the resistor unit includes a fifth resistor and a sixth resistor, and the capacitor unit includes a first capacitor and a second capacitor.

[0025] The first end of the fifth resistor is connected to the oscillation unit, and the second end of the fifth resistor is connected to the first end of the second capacitor;

[0026] The first end of the sixth resistor is connected to the oscillation unit, and the second end of the sixth resistor is connected to the first end of the second capacitor;

[0027] The first end of the first capacitor is connected to the oscillation unit, and the second ends of both the first capacitor and the second capacitor are connected to the voltage detection light-emitting module.

[0028] In the implementation of the above technical solution, the resistor unit and capacitor unit with this structure can better ensure the stable generation of the square wave oscillation signal and the stability of the DC motor simulation detector, and reduce the occurrence of abnormalities in the DC motor simulation detector.

[0029] In a preferred embodiment of this application, the DC motor simulation detector further includes a self-test light-emitting module, which is connected to the oscillation module and is used to connect to the main board of the air conditioner indoor unit to be tested.

[0030] In the implementation of the above technical solution, during maintenance, the maintenance personnel can connect the self-test light-emitting module to the FG terminal of the main board of the air conditioner indoor unit to be tested, and connect the self-test light-emitting module to the oscillation module. By observing the light emission of the self-test light-emitting module, it can be determined whether the DC motor simulation detector is faulty. If the self-test light-emitting module does not emit light, it indicates that the DC motor simulation detector is faulty. The setting of the self-test light-emitting module can further facilitate the maintenance personnel in repairing the fault of the air conditioner indoor unit not blowing air, and further improve the accuracy of detection and judgment and maintenance efficiency.

[0031] In a preferred embodiment of this application, the self-testing light-emitting module includes a fourth light-emitting element and a fourth resistor arranged in series.

[0032] In the implementation of the above technical solution, the circuit components of the self-testing light-emitting module are relatively simple, and the detection function can be well achieved without complicated settings.

[0033] This application discloses a DC motor simulation detector, which, compared with the prior art, has at least the following advantages:

[0034] The DC motor simulation detector of this application is used for fault detection of an indoor air conditioner unit. It includes a voltage detection light-emitting module and an oscillation module. The voltage detection light-emitting module has a Zener diode and a light-emitting element arranged in series. The oscillation module is connected to the voltage detection light-emitting module and is used to generate a square wave oscillation signal simulating a DC motor. The voltage detection light-emitting module and the oscillation module are used to connect to the main board of the indoor air conditioner unit to be tested. When an air conditioner's indoor unit fails to blow air, technicians can use this DC motor simulation detector to identify the faulty component causing the lack of airflow. Specifically, during repair, technicians connect the voltage detection and oscillation modules of the DC motor simulation detector to the mainboard of the indoor unit being tested. The oscillation module generates a square wave oscillation signal simulating a DC motor. This square wave oscillation signal corresponds to the square wave pulse signal generated when a DC motor is running normally. By checking whether the light-emitting element of the voltage detection module illuminates and whether the air conditioner's display panel shows a fault code, it can be determined whether the fault lies with the mainboard or the DC motor. This allows for quick and accurate detection of the faulty component causing the air conditioner's indoor unit to fail to blow air, thus facilitating repairs, reducing repair time, increasing efficiency, and lowering costs. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the first connection structure between the DC motor simulation detector and the air conditioner indoor unit main board provided in an embodiment of this application;

[0037] Figure 2 This is a schematic diagram of the second connection structure between the DC motor simulation detector and the air conditioner indoor unit main board provided in the embodiments of this application;

[0038] Figure 3 This is a schematic diagram of the circuit connection structure between the DC motor simulation detector and the main board of the air conditioner indoor unit provided in the embodiments of this application;

[0039] Figure 4 This is a schematic diagram of the third connection structure between the DC motor simulation detector and the air conditioner indoor unit main board provided in the embodiments of this application;

[0040] Figure 5 This is a structural block diagram of the oscillation module provided in the embodiments of this application.

[0041] Reference numerals: 11-Voltage detection light-emitting module; 111-First voltage detection light-emitting unit; 112-Second voltage detection light-emitting unit; 113-Third voltage detection light-emitting unit; 12-Oscillation module; 121-Oscillation unit; 122-Resistor unit; 123-Capacitor unit; 13-Self-test light-emitting module; 20-Air conditioner indoor unit main board; LED1-First light-emitting element; LED2-Second light-emitting element; LED3-Third light-emitting element; LED4-Fourth light-emitting element; R1-First resistor; R2-Second resistor; R3-Third resistor; R4-Fourth resistor; R5-Fifth resistor; R6-Sixth resistor; D1-First Zener diode; D2-Second Zener diode; C1-First capacitor; C2-Second capacitor. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0043] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0044] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0045] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0046] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0047] Currently, when an air conditioner's indoor unit fails to blow air, it could be due to a fault in the DC motor itself, or a fault in the indoor unit's main board causing the DC motor to stop turning and thus preventing airflow. During repairs, technicians often struggle to accurately determine whether the problem stems from the main board or the DC motor. If simply disassembling the casing to replace the DC motor fails to resolve the issue, the main board must also be disassembled and replaced. This process introduces numerous inconveniences for repair personnel, is time-consuming, inefficient, and increases repair costs.

[0048] To address the problems in the prior art, this application provides a DC motor simulation detector that can simulate the square wave pulse signal generated during normal operation of a DC motor. This detector can quickly and accurately detect and identify faulty components that cause the indoor unit of an air conditioner to not blow air, thereby facilitating maintenance personnel in repairing the air conditioner's lack of airflow, reducing maintenance time, improving maintenance efficiency, and lowering maintenance costs.

[0049] Example 1

[0050] See Figure 1 The DC motor analog detector of this application includes:

[0051] Voltage detection light-emitting module 11, which has a voltage-detecting light-emitting module 11 having a voltage-regulating diode and a light-emitting element arranged in series;

[0052] Oscillating module 12, which is connected to voltage detection and light-emitting module 11, is used to generate a square wave oscillation signal simulating a DC motor;

[0053] The voltage detection light-emitting module 11 and the oscillation module 12 are used to connect to the main board 20 of the indoor unit of the air conditioner to be tested.

[0054] In this embodiment, the DC motor simulation detector is used for the detection of the indoor unit of the air conditioner. Specifically, the DC motor simulation detector can be used to detect and determine the faulty component that causes the indoor unit to not blow air when the indoor unit of the air conditioner has a fault of not blowing air. It can determine whether the faulty component is the main board 20 of the indoor unit of the air conditioner or the DC motor installed in the indoor unit of the air conditioner.

[0055] In this embodiment, the oscillation module 12 is used to generate a square wave oscillation signal that simulates a DC motor. This square wave oscillation signal corresponds to the square wave pulse signal generated when the DC motor is running normally, thereby simulating the DC motor.

[0056] The voltage detection light-emitting module 11 has a Zener diode and a light-emitting element connected in series. When the voltage detection light-emitting module 11 and the oscillation module 12 are connected to the main board 20 of the air conditioner indoor unit to be tested, it is used to detect and determine whether the main board 20 of the air conditioner indoor unit or the DC motor is faulty. Specifically, if the light-emitting element of the voltage detection light-emitting module 11 does not light up, it indicates that the main board 20 of the air conditioner indoor unit is faulty; if the light-emitting element of the voltage detection light-emitting module 11 lights up, and the air conditioner indoor unit display panel still displays a fault code after a predetermined detection time (e.g., 2 minutes), it indicates that the main board 20 of the air conditioner indoor unit is faulty; if the light-emitting element of the voltage detection light-emitting module 11 lights up, and the air conditioner indoor unit display panel does not display a fault code after the predetermined detection time, it indicates that the DC motor is faulty.

[0057] In some implementations, the voltage detection light-emitting module 11 and the oscillation module 12 can be arranged on a PCB board; during detection, the DC motor simulation detector can be connected to the corresponding motor pin socket position on the air conditioner indoor unit main board 20 via a connecting wire.

[0058] The DC motor simulation detector of this application embodiment allows maintenance personnel to detect and determine the faulty component causing the lack of airflow in an air conditioner indoor unit when the unit fails to blow air. Specifically, during maintenance, the technician connects the voltage detection light-emitting module 11 and the oscillation module 12 of the DC motor simulation detector to the main board 20 of the indoor unit to be tested. The oscillation module 12 generates a square wave oscillation signal simulating a DC motor, which corresponds to the square wave pulse signal generated when the DC motor is running normally. By checking whether the light-emitting element of the voltage detection light-emitting module 11 emits light and whether the display panel of the indoor unit shows a fault code, it can be determined whether the fault is in the main board 20 or the DC motor. This allows for quick and accurate detection and determination of the faulty component causing the lack of airflow in the indoor unit. Once it is determined whether the faulty component is in the main board 20 or the DC motor, the technician can accurately repair or replace the faulty component. This facilitates the repair of the air conditioner indoor unit's lack of airflow, reduces maintenance time, improves maintenance efficiency, and lowers maintenance costs.

[0059] Example 2

[0060] See Figure 2 and Figure 3 Based on the above embodiment one, the difference between this embodiment and embodiment one is that the DC motor simulation detector in this embodiment includes a first voltage detection light-emitting unit 111, a second voltage detection light-emitting unit 112, and a third voltage detection light-emitting unit 113.

[0061] The first voltage detection light-emitting unit 111 and the second voltage detection light-emitting unit 112 have a Zener diode and a light-emitting element arranged in series, and the third voltage detection light-emitting unit 113 has a light-emitting element;

[0062] The first voltage detection light-emitting unit 111 is used to connect to the VDC terminal of the main board 20 of the air conditioner indoor unit to be tested, the second voltage detection light-emitting unit 112 is used to connect to the VCC terminal of the main board 20 of the air conditioner indoor unit to be tested, and the third voltage detection light-emitting unit 113 is used to connect to the VSP terminal of the main board 20 of the air conditioner indoor unit to be tested.

[0063] In some implementations, the motor pin socket position corresponding to the indoor unit main board 20 of the air conditioner may be provided with a VDC terminal, a VCC terminal, and a VSP terminal.

[0064] In the above structure, the voltage detection light-emitting module 11 is equipped with three voltage detection light-emitting units, which are respectively used to connect to the VDC terminal, VCC terminal and VSP terminal of the air conditioner indoor unit main board 20. When the maintenance personnel detect and judge the faulty parts that cause the air conditioner indoor unit to not blow air, they can quickly judge whether there is an abnormality in the VDC, VCC and VSP voltages provided by the air conditioner indoor unit main board 20 to the DC motor by observing the light emission status of the three voltage detection light-emitting units. If there is an abnormality in the corresponding voltage provided to the DC motor, the corresponding voltage detection light-emitting unit will not light up, indicating that the air conditioner indoor unit main board 20 is faulty. Specifically, if the VDC high voltage of the air conditioner indoor unit main board 20 is too low, for example, when the voltage is lower than 250V and does not reach the high voltage working voltage of the DC motor, the light-emitting element of the first voltage detection light-emitting unit 111 will not light up, indicating that there is an abnormality in the VDC voltage provided by the air conditioner indoor unit main board 20 to the DC motor, and the air conditioner indoor unit main board 20 is faulty. If the VCC control voltage of the air conditioner indoor unit main board 20 is too low, for example, when the voltage is below 13V and does not reach the normal operating voltage of the DC motor, the light-emitting element of the second voltage detection light-emitting unit 112 will not light up, indicating that there is an abnormality in the VCC voltage provided by the air conditioner indoor unit main board 20 to the DC motor, and the air conditioner indoor unit main board 20 is faulty; if the motor speed regulation voltage VSP of the air conditioner indoor unit main board 20 is too low, for example, when the voltage is below 2.5V and does not reach the voltage required for the normal operation of the DC motor, the light-emitting element of the third voltage detection light-emitting unit 113 will not light up, indicating that there is an abnormality in the VSP voltage provided by the air conditioner indoor unit main board 20 to the DC motor, and the air conditioner indoor unit main board 20 is faulty; for the case where all three voltage detection light-emitting units light up, please refer to the detection and judgment method corresponding to Embodiment 1, which will not be repeated here; this structural setting can more quickly and accurately detect and judge whether the faulty component causing the air conditioner indoor unit to not blow air is the air conditioner indoor unit main board 20.

[0065] In this embodiment, the first voltage detection light-emitting unit 111 includes a first light-emitting element LED1, a first resistor R1 and a first Zener diode D1 arranged in series; the second voltage detection light-emitting unit 112 includes a second light-emitting element LED2, a second resistor R2 and a second Zener diode D2 arranged in series; and the third voltage detection light-emitting unit 113 includes a third light-emitting element LED3 and a third resistor R3 arranged in series.

[0066] Specifically, the first light-emitting element LED1, the second light-emitting element LED2, and the third light-emitting element LED3 are all light-emitting diodes.

[0067] In the above structure, the circuit components of the first voltage detection light-emitting unit 111, the second voltage detection light-emitting unit 112 and the third voltage detection light-emitting unit 113 are relatively simple, and the detection function can be well achieved without complicated settings.

[0068] Example 3

[0069] See Figure 3 and Figure 4 Based on the above embodiment one or embodiment two, the difference between this embodiment and embodiment one or embodiment two is that the DC motor simulation detector in this embodiment also includes a self-test light-emitting module 13, which is connected to the oscillation module 12 and is used to connect to the main board 20 of the air conditioner indoor unit to be tested.

[0070] Specifically, the self-test light-emitting module 13 includes a fourth light-emitting element LED4 and a fourth resistor R4 connected in series, wherein the fourth light-emitting element LED4 is a light-emitting diode.

[0071] In the above structure, when performing maintenance, the maintenance personnel can connect the self-test light-emitting module 13 to the FG terminal of the main board 20 of the indoor unit of the air conditioner to be tested. The self-test light-emitting module 13 is also connected to the oscillation module 12. The illumination status of the self-test light-emitting module 13 can determine whether the DC motor simulation detector is faulty. If the self-test light-emitting module 13 does not light up, it indicates that the DC motor simulation detector is faulty. The setting of the self-test light-emitting module 13 can further facilitate the maintenance personnel to repair the fault of the indoor unit of the air conditioner not blowing air, and further improve the accuracy of detection and judgment and maintenance efficiency.

[0072] Example 4

[0073] See Figures 3 to 5 Based on any of the above embodiments one to three, the difference between this embodiment and any of the embodiments one to three is that the DC motor simulation detector in this embodiment has an oscillation module 12 including an oscillation unit 121, a resistor unit 122 and a capacitor unit 123. The resistor unit 122 and the capacitor unit 123 are both connected to the oscillation unit 121, and the resistor unit 122 is connected to the capacitor unit 123.

[0074] In the above structure, the structure of the oscillation module 12 enables the oscillation unit 121 to stably generate a square wave oscillation signal simulating a DC motor, which better ensures the simulation of the square wave pulse signal generated during normal operation of the DC motor, thereby ensuring the accuracy of using this DC motor simulation detector to detect and judge the faulty components that cause the indoor unit of the air conditioner to not blow air.

[0075] In this embodiment, the oscillation unit 121 is an IC555 chip. Pin 1 (GND): Ground or 0V, is the negative power supply pin of the IC; Pin 2 (TRIG): Flip-flop or input pin, a negative momentary trigger on this input pin causes output pin 3 to go high; Pin 3 (OUT): Output pin, responding to the output of the input pin, either goes high, goes low, or oscillates on / off; Pin 4 (RST): Reset pin, always connected to a positive power supply to ensure normal IC operation; when grounded, the IC output will temporarily reset to its initial position; if permanently grounded, IC operation will remain disabled; Pin 5 (CONTROL): Control pin, an external variable DC potential can be applied to this pin to control or adjust the pulse width of pin 3 and generate controlled PWM; Pin 6 (THRESH): Threshold pin, when the charge of the timing capacitor reaches the upper threshold of 2 / 3 of the power supply voltage, it causes the output to go low (0V); Pin 7 (D ISCH): Discharge pin, controlled by an internal trigger. When the timing capacitor reaches 2 / 3 of the power supply voltage threshold level, it will force the timing capacitor to discharge; Pin 8 (VCC): Power supply pin, which provides the operating voltage for the IC.

[0076] In the above structure, the oscillation unit 121 uses the IC555 chip, which has the advantages of high flexibility, accurate timing and simple interface. It can generate square wave oscillation signals of analog DC motors relatively stably, so as to better ensure the detection effect and accuracy.

[0077] In this embodiment, the resistor unit 122 includes a fifth resistor R5 and a sixth resistor R6, and the capacitor unit 123 includes a first capacitor C1 and a second capacitor C2.

[0078] The first end of the fifth resistor R5 is connected to the oscillation unit 121, and the second end of the fifth resistor R5 is connected to the first end of the second capacitor C2.

[0079] The first end of the sixth resistor R6 is connected to the oscillation unit 121, and the second end of the sixth resistor R6 is connected to the first end of the second capacitor C2.

[0080] The first terminal of the first capacitor C1 is connected to the oscillation unit 121, and the second terminals of the first capacitor C1 and the second capacitor C2 are both connected to the voltage detection light-emitting module 11.

[0081] Specifically, the specific circuit connection structure of the IC555 chip, the fifth resistor R5 and the sixth resistor R6, the first capacitor C1 and the second capacitor C2 in this embodiment, and the first voltage detection light-emitting unit 111, the second voltage detection light-emitting unit 112 and the third voltage detection light-emitting unit 113 in Embodiment 2 can be found in [reference needed]. Figure 3The details will not be repeated in this embodiment; similarly, the specific circuit connection structure of the IC555 chip, the fifth resistor R5 and the sixth resistor R6, the first capacitor C1 and the second capacitor C2 in this embodiment, and the fourth light-emitting element LED4 and the fourth resistor R4 of the self-test light-emitting module 13 in Embodiment 3 can be found in [reference needed]. Figure 3 This will not be elaborated further in this embodiment.

[0082] In this embodiment, by selecting a suitable fifth resistor R5 and a second capacitor C2, the pulse frequency of the oscillation unit 121 can be made to be basically the same as the FG signal of the DC motor.

[0083] In the above structure, the resistor unit 122 and capacitor unit 123 with this structure can better ensure the stable generation of square wave oscillation signal and the stability of this DC motor analog detector, and reduce the occurrence of abnormalities in this DC motor analog detector.

[0084] In all the above embodiments, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0085] It should be understood that phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0086] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0087] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A DC motor simulation detector, characterized in that, The DC motor simulation detector, used for testing indoor units of air conditioners, includes: A voltage detection light-emitting module (11) has a Zener diode and a light-emitting element connected in series; An oscillation module (12) is connected to the voltage detection and light-emitting module (11) and is used to generate a square wave oscillation signal simulating a DC motor. The voltage detection light-emitting module (11) and the oscillation module (12) are used to connect to the main board (20) of the indoor unit of the air conditioner to be tested.

2. The DC motor simulation detector according to claim 1, characterized in that, The voltage detection light-emitting module (11) includes a first voltage detection light-emitting unit (111), a second voltage detection light-emitting unit (112), and a third voltage detection light-emitting unit (113). The first voltage detection light-emitting unit (111) and the second voltage detection light-emitting unit (112) have a Zener diode and a light-emitting element connected in series, and the third voltage detection light-emitting unit (113) has a light-emitting element; The first voltage detection light-emitting unit (111) is used to connect to the VDC terminal of the air conditioner indoor unit main board (20) to be tested, the second voltage detection light-emitting unit (112) is used to connect to the VCC terminal of the air conditioner indoor unit main board (20) to be tested, and the third voltage detection light-emitting unit (113) is used to connect to the VSP terminal of the air conditioner indoor unit main board (20) to be tested.

3. The DC motor simulation detector according to claim 2, characterized in that, The first voltage detection light-emitting unit (111) includes a first light-emitting element, a first resistor and a first Zener diode arranged in series.

4. The DC motor simulation detector according to claim 2, characterized in that, The second voltage detection light-emitting unit (112) includes a second light-emitting element, a second resistor, and a second Zener diode arranged in series.

5. The DC motor simulation detector according to claim 2, characterized in that, The third voltage detection light-emitting unit (113) includes a third light-emitting element and a third resistor arranged in series.

6. The DC motor simulation detector according to any one of claims 1-5, characterized in that, The oscillation module (12) includes an oscillation unit (121), a resistor unit (122) and a capacitor unit (123). The resistor unit (122) and the capacitor unit (123) are both connected to the oscillation unit (121), and the resistor unit (122) is connected to the capacitor unit (123).

7. The DC motor simulation detector according to claim 6, characterized in that, The oscillation unit (121) is an IC555 chip.

8. The DC motor simulation detector according to claim 6, characterized in that, The resistor unit (122) includes a fifth resistor and a sixth resistor, and the capacitor unit (123) includes a first capacitor and a second capacitor. The first end of the fifth resistor is connected to the oscillation unit (121), and the second end of the fifth resistor is connected to the first end of the second capacitor; The first end of the sixth resistor is connected to the oscillation unit (121), and the second end of the sixth resistor is connected to the first end of the second capacitor; The first end of the first capacitor is connected to the oscillation unit (121), and the second end of the first capacitor and the second end of the second capacitor are both connected to the voltage detection light-emitting module (11).

9. The DC motor simulation detector according to any one of claims 1-5, characterized in that, The DC motor simulation detector also includes a self-test light-emitting module (13), which is connected to the oscillation module (12) and is used to connect to the main board (20) of the indoor unit of the air conditioner to be tested.

10. The DC motor simulation detector according to claim 9, characterized in that, The self-test light-emitting module (13) includes a fourth light-emitting element and a fourth resistor connected in series.

Images