Direct current motor simulation detector

Abstract

The invention discloses a direct current motor simulation detector, which is used for detecting an air conditioner indoor unit, and comprises a voltage detection light-emitting module which is provided with a voltage stabilizing diode and a light-emitting element which are connected in series; the oscillation module is connected with the voltage detection light-emitting module and is used for generating a square wave oscillation signal for simulating a direct current motor; the voltage detection light-emitting module and the oscillation module are used for being connected with an air conditioner indoor unit mainboard to be detected. According to the application, the square wave pulse signal generated when the direct current motor normally runs can be simulated, and the fault component which causes the air-out failure of the air conditioner indoor unit can be quickly and accurately detected and judged, so that maintenance personnel can conveniently maintain the air-out failure of the air conditioner indoor unit, the maintenance time is reduced, the maintenance efficiency is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioner fault detection, and in particular to a DC motor simulation detector. Background Art

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

[0003] However, once the air conditioner indoor unit fails, it will bring many difficulties to the maintenance of the air conditioner indoor unit. For example, when the air conditioner indoor unit fails to blow air, it may be that the DC motor itself fails to blow air, or it may be that the main board of the air conditioner indoor unit fails to rotate and the air is not blown out. When repairing the air conditioner indoor unit, maintenance personnel often find it difficult to accurately determine whether the failure to blow air is caused by the failure of the main board of the air conditioner indoor unit or the failure of the DC motor. In this case, if the maintenance personnel directly dismantle the shell and replace the DC motor and fail to solve the failure of the air conditioner indoor unit, they will need to dismantle and replace the main board of the air conditioner indoor unit. This brings a lot of inconvenience to the maintenance personnel in repairing the failure of the air conditioner indoor unit, and the maintenance takes a long time and has low maintenance efficiency, which increases the maintenance cost. Summary of the Invention

[0004] The purpose of this application is to provide a DC motor simulation detector, which can simulate the square wave pulse signal generated by the normal operation of the DC motor, and is used to quickly and accurately detect and determine the faulty components that cause the air conditioner indoor unit to not blow air, thereby facilitating maintenance personnel to repair the fault of the air conditioner indoor unit not blowing air, reducing the maintenance time, improving maintenance efficiency, and reducing maintenance costs.

[0005] To achieve the above objectives, the present application provides a DC motor simulation detector for detecting an indoor unit of an air conditioner, the DC motor simulation detector comprising:

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

[0007] an oscillation module, connected to the voltage detection and light-emitting module, and configured 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 mainboard of the air conditioner indoor unit to be detected.

[0009] During the implementation of the above technical solution, when an air conditioner indoor unit fails to produce air, maintenance personnel can use this DC motor simulation detector to detect and determine the faulty component that causes the air conditioner indoor unit to fail to produce air. Specifically, during maintenance, the maintenance personnel connect the voltage detection light-emitting module and the oscillation module of the DC motor simulation detector to the mainboard of the air conditioner indoor unit to be detected. The oscillation module is used to generate a square wave oscillation signal that simulates the DC motor. The square wave oscillation signal corresponds to the square wave pulse signal generated when the DC motor is operating normally. By determining whether the light-emitting element of the voltage detection light-emitting module emits light and whether the display panel of the air conditioner indoor unit displays a fault code, it can be determined whether it is a faulty mainboard of the air conditioner indoor unit or a faulty DC motor. In this way, the faulty component that causes the air conditioner indoor unit to fail to produce air can be detected and determined quickly and accurately, which can facilitate maintenance personnel to repair the fault of the air conditioner indoor unit failing to produce air, reduce maintenance time, improve maintenance efficiency, and reduce maintenance costs.

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

[0011] The first voltage detection light emitting unit and the second voltage detection light emitting unit include a voltage stabilizing diode and a light emitting element arranged in series, and the third voltage detection light emitting unit includes a light emitting element;

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

[0013] In the process of implementing the above technical solution, the voltage detection light-emitting module is provided 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-conditioning indoor unit mainboard. When the maintenance personnel detect and determine the faulty component that causes the air-conditioning indoor unit to not blow air, they can quickly determine whether there is an abnormality in the VDC, VCC and VSP voltages provided to the DC motor by the air-conditioning indoor unit mainboard through the lighting conditions 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-conditioning indoor unit mainboard is faulty. This structural setting can more quickly and accurately detect and determine whether the faulty component that causes the air-conditioning indoor unit to not blow air is the air-conditioning indoor unit mainboard.

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

[0015] In the process of implementing 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 the present application, the second voltage detection light-emitting unit includes a second light-emitting element, a second resistor and a second voltage-stabilizing diode arranged in series.

[0017] In the process of implementing 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 complex settings.

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

[0019] In the process of implementing 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 complex settings.

[0020] In a preferred embodiment of the present application, the oscillation module includes an oscillation unit, a resistance unit and a capacitance unit, the resistance unit and the capacitance unit are both connected to the oscillation unit, and the resistance unit is connected to the capacitance unit.

[0021] During 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, better ensuring the simulation of the square wave pulse signal generated during the normal operation of the DC motor, and further ensuring the accuracy of using this DC motor simulation detector to detect and determine the faulty components that cause the air conditioner indoor unit to fail to produce air.

[0022] In a preferred embodiment of the present 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, precise timing and simple interface. It can generate a square wave oscillation signal simulating a DC motor more stably, and better ensure the detection effect and accuracy.

[0024] In a preferred embodiment of the present 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] A first end of the fifth resistor is connected to the oscillation unit, and a second end of the fifth resistor is connected to the first end of the second capacitor;

[0026] A first end of the sixth resistor is connected to the oscillation unit, and a 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 end of the first capacitor and the second end of the second capacitor are both connected to the voltage detection light-emitting module.

[0028] In the process of implementing the above technical solution, the use of the resistance unit and the capacitance unit of this structure can better ensure the stable generation of the square wave oscillation signal and the stability of this DC motor simulation detector, and reduce the abnormal situation of this DC motor simulation detector.

[0029] In a preferred embodiment of the present 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 mainboard of the air conditioner indoor unit to be detected.

[0030] During the implementation of the above technical solution, maintenance personnel can connect the self-test light-emitting module to the FG terminal of the main board of the air-conditioning indoor unit to be tested, and connect the self-test light-emitting module to the oscillation module. The light emission of the self-test light-emitting module can be used to determine 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 maintenance personnel to repair the fault of the air-conditioning indoor unit not producing air, and further improve the accuracy of detection and judgment and maintenance efficiency.

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

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

[0033] The present invention provides a DC motor simulation detector, which has at least the following advantages compared with the prior art:

[0034] The DC motor simulation detector of the present application is used for fault detection of the indoor unit of the air conditioner, which includes a voltage detection light-emitting module and an oscillation module, wherein the voltage detection light-emitting module has a voltage-stabilizing 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 mainboard of the indoor unit of the air conditioner to be detected. 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 that causes the air conditioner indoor unit to fail to blow air. Specifically, during maintenance, maintenance personnel connect the voltage detection light-emitting module and oscillation module of the DC motor simulation detector to the air conditioner indoor unit mainboard to be detected. The oscillation module is used to generate a square wave oscillation signal that simulates the DC motor. The square wave oscillation signal corresponds to the square wave pulse signal generated when the DC motor is operating normally. By determining whether the light-emitting element of the voltage detection light-emitting module is illuminated and whether the air conditioner indoor unit display panel displays a fault code, it can be determined whether it is the air conditioner indoor unit mainboard fault or the DC motor fault. In this way, the faulty component that causes the air conditioner indoor unit to fail to blow air can be detected and determined quickly and accurately, which can facilitate maintenance personnel to repair the air conditioner indoor unit failure, reduce maintenance time, improve maintenance efficiency, and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

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

[0037] Figure 2 This is a schematic diagram of a second connection structure between a DC motor simulation detector and an air conditioner indoor unit mainboard provided in an embodiment of the present application;

[0038] Figure 3 This is a schematic diagram of the circuit connection structure between the DC motor simulation detector and the air conditioner indoor unit mainboard provided in an embodiment of the present application;

[0039] Figure 4 This is a schematic diagram of a third connection structure between a DC motor simulation detector and an air conditioner indoor unit mainboard provided in an embodiment of the present application;

[0040] Figure 5 This is a structural block diagram of the oscillation module provided in an embodiment of the present application.

[0041] Figure markings: 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-resistance unit; 123-capacitance 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 voltage-stabilizing diode; D2-second voltage-stabilizing diode; C1-first capacitor; C2-second capacitor. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0043] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0044] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to express a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0045] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or point connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

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

[0047] At present, when the air conditioner indoor unit fails to produce air, it may be due to a fault in the DC motor itself, or it may be due to a fault in the air conditioner indoor unit main board, causing the DC motor to stop rotating and not producing air. When repairing the air conditioner indoor unit, maintenance personnel often find it difficult to accurately determine whether the failure to produce air is caused by a fault in the air conditioner indoor unit main board or a fault in the DC motor. In this case, if the maintenance personnel directly dismantle the shell and replace the DC motor and fail to solve the failure of the air conditioner indoor unit, they will need to dismantle and replace the air conditioner indoor unit main board again. This brings a lot of inconvenience to the maintenance personnel in repairing the failure of the air conditioner indoor unit, and the maintenance takes a long time and has low maintenance efficiency, which increases the maintenance cost.

[0048] In response to the problems in the above-mentioned prior art, an embodiment of the present application provides a DC motor simulation detector that can simulate the square wave pulse signal generated by the normal operation of the DC motor, and is used to quickly and accurately detect and determine the faulty components that cause the air conditioner indoor unit to not produce air, thereby facilitating maintenance personnel to repair the fault of the air conditioner indoor unit not producing air, reducing the maintenance time, improving maintenance efficiency, and reducing maintenance costs.

[0049] Example 1

[0050] See also Figure 1 The DC motor simulation detector of the embodiment of the present application includes:

[0051] A voltage detection light emitting module 11 includes a voltage stabilizing diode and a light emitting element arranged in series;

[0052] An oscillation module 12 is connected to the voltage detection light-emitting module 11 and 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 mainboard 20 of the air conditioner indoor unit to be detected.

[0054] In this embodiment, the DC motor simulation detector is used to detect 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 of the air conditioner to not produce air when the indoor unit of the air conditioner fails to produce air, and determine whether the faulty component is the indoor unit mainboard 20 of the air conditioner or the DC motor provided 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 simulating a DC motor. The square wave oscillation signal corresponds to the square wave pulse signal generated when the DC motor is operating normally. In this way, the DC motor is simulated.

[0056] The voltage detection light-emitting module 11 has a voltage-stabilizing diode and a light-emitting element arranged in series, which can be used to detect and determine whether the air-conditioning indoor unit main board 20 or the DC motor is faulty when the voltage detection light-emitting module 11 and the oscillation module 12 are connected to the air-conditioning indoor unit main board 20 to be detected. Specifically, if the light-emitting element of the voltage detection light-emitting module 11 does not emit light, it means that the air-conditioning indoor unit main board 20 is faulty; if the light-emitting element of the voltage detection light-emitting module 11 emits light, and the air-conditioning indoor unit display panel still displays a fault code after a predetermined detection time (for example, 2 minutes), ... does not display a fault code after a predetermined detection time, it means that the DC motor is faulty.

[0057] In some embodiments, 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 motor pin seat position corresponding to the air conditioner indoor unit main board 20 via a connecting wire.

[0058] The DC motor simulation detector of the embodiment of the present application can be used by maintenance personnel to detect and determine the faulty component causing the air conditioner indoor unit to fail to blow air when an air conditioner indoor unit fails to blow air. Specifically, during maintenance, the maintenance personnel connect the voltage detection light-emitting module 11 and the oscillation module 12 of the DC motor simulation detector to the air conditioner indoor unit mainboard 20 to be detected. The oscillation module 12 is used to generate a square wave oscillation signal simulating a DC motor. The square wave oscillation signal corresponds to the square wave pulse signal generated when the DC motor is operating normally. By determining whether the light-emitting element of the voltage detection light-emitting module 11 is illuminated and whether the air conditioner indoor unit display panel displays a fault code, it can be determined whether the fault is in the air conditioner indoor unit mainboard 20 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. After determining whether the faulty component causing the air conditioner indoor unit to fail to blow air is in the air conditioner indoor unit mainboard 20 or the DC motor, the maintenance personnel can accurately repair or replace the faulty component, thereby facilitating the maintenance personnel to repair the fault causing the air conditioner indoor unit to fail to blow air, reducing the maintenance time, improving maintenance efficiency, and reducing maintenance costs.

[0059] Example 2

[0060] See also Figure 2 and Figure 3 Based on the above-mentioned embodiment 1, the difference between this embodiment and embodiment 1 is that the DC motor simulation detector of this embodiment includes a voltage detection light-emitting module 11 including 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 voltage stabilizing 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 the VDC terminal of the air-conditioning indoor unit main board 20 to be detected, the second voltage detection light-emitting unit 112 is used to connect the VCC terminal of the air-conditioning indoor unit main board 20 to be detected, and the third voltage detection light-emitting unit 113 is used to connect the VSP terminal of the air-conditioning indoor unit main board 20 to be detected.

[0063] In some embodiments, a VDC terminal, a VCC terminal, and a VSP terminal may be provided at the motor pin socket position corresponding to the air conditioner indoor unit mainboard 20 .

[0064] In the above structure, the voltage detection light-emitting module 11 is provided 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-conditioning indoor unit main board 20. When the maintenance personnel detect and determine the faulty component that causes the air-conditioning indoor unit to not blow air, they can quickly determine whether the VDC, VCC and VSP voltages provided to the DC motor by the air-conditioning indoor unit main board 20 are abnormal through the lighting conditions of the three voltage detection light-emitting units. If the corresponding voltage provided to the DC motor is abnormal, the corresponding voltage detection light-emitting unit will not emit light, indicating that the air-conditioning indoor unit main board 20 is faulty. Specifically, if the VDC high-voltage voltage of the air-conditioning indoor unit main board 20 is 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 emit light, indicating that the VDC voltage provided to the DC motor by the air-conditioning indoor unit main board 20 is abnormal and the air-conditioning indoor unit main board 20 is faulty. If the VCC control voltage of the air conditioner indoor unit main board 20 is low, for example, when the voltage is lower than 13V and does not reach the normal working voltage of the DC motor, the light-emitting element of the second voltage detection light-emitting unit 112 will not emit light, indicating that the VCC voltage provided by the air conditioner indoor unit main board 20 to the DC motor is abnormal and the air conditioner indoor unit main board 20 is faulty; if the motor speed control voltage VSP of the air conditioner indoor unit main board 20 is low, for example, when the voltage is lower than 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 emit light, indicating that the VSP voltage provided by the air conditioner indoor unit main board 20 to the DC motor is abnormal and the air conditioner indoor unit main board 20 is faulty; for the case where all three voltage detection light-emitting units are lit, please refer to the corresponding detection and judgment method of Example 1, which will not be repeated here; this structural setting can more quickly and accurately detect and determine whether the faulty component that causes the air conditioner indoor unit to not air out 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 voltage-stabilizing 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 voltage-stabilizing diode D2 arranged in series; 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 can achieve the detection function well without complicated settings.

[0068] Example 3

[0069] See also Figure 3 and Figure 4 Based on the above-mentioned embodiment 1 or embodiment 2, the difference between this embodiment and embodiment 1 or embodiment 2 is that the DC motor simulation detector of this embodiment further includes a self-test light-emitting module 13, the self-test light-emitting module 13 is connected to the oscillation module 12, and the self-test light-emitting module 13 is used to connect to the air conditioner indoor unit mainboard 20 to be detected.

[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, maintenance personnel can connect the self-test light-emitting module 13 to the FG terminal of the air-conditioning indoor unit main board 20 to be tested, and the self-test light-emitting module 13 is connected to the oscillation module 12. The light-emitting condition of the self-test light-emitting module 13 can be used to determine whether the DC motor simulation detector is faulty. If the self-test light-emitting module 13 does not emit light, it indicates that the DC motor simulation detector is faulty. The setting of the self-test light-emitting module 13 can further facilitate maintenance personnel to repair the fault of the air-conditioning indoor unit not producing air, and further improve the accuracy of detection and judgment and maintenance efficiency.

[0072] Example 4

[0073] See also Figures 3 to 5 Based on any one of the above-mentioned embodiments 1 to 3, the difference between this embodiment and any one of the embodiments 1 to 3 is that, in the DC motor simulation detector of this embodiment, the oscillation module 12 includes an oscillation unit 121, a resistance unit 122 and a capacitance unit 123, the resistance unit 122 and the capacitance unit 123 are both connected to the oscillation unit 121, and the resistance unit 122 is connected to the capacitance unit 123.

[0074] In the above structure, the structure of the oscillation module 12 can enable the oscillation unit 121 to stably generate a square wave oscillation signal simulating a DC motor, better ensure the simulation of the square wave pulse signal generated during the normal operation of the DC motor, and further ensure the accuracy of using this DC motor simulation detector to detect and determine the faulty components that cause the air conditioner indoor unit to fail to produce air.

[0075] In this embodiment, the oscillation unit 121 is an IC555 chip, wherein pin 1 (GND) of the IC555 chip is grounded or 0V and is the negative power supply pin of the IC; pin 2 (TRIG) is a trigger or input pin, a negative momentary trigger on this input pin causes the output pin 3 to become a high level; pin 3 (OUT) is an output pin, which responds to the output of the input pin and either becomes high or low or oscillates on / off; pin 4 (RST) is a reset pin, which is always connected to the positive power supply to ensure the normal operation of the IC; when grounded, the IC output is temporarily reset to its initial position; if permanently grounded, the IC operation will remain disabled; pin 5 (CONTROL) is a 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) is a 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 become a low level (0V); pin 7 (D ISCH): discharge pin, controlled by an internal trigger, which forces the timing capacitor to discharge when it reaches the 2 / 3 power supply voltage threshold level; Pin 8 (VCC): power supply pin, provides operating voltage for the IC.

[0076] In the above structure, the oscillation unit 121 adopts IC555 chip, which has the advantages of high flexibility, precise timing and simple interface, and can generate a square wave oscillation signal simulating a DC motor more stably, thereby better ensuring 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] A first end of the fifth resistor R5 is connected to the oscillation unit 121 , and a second end of the fifth resistor R5 is connected to a first end of the second capacitor C2 ;

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

[0080] A first end of the first capacitor C1 is connected to the oscillation unit 121 , and a second end of the first capacitor C1 and a second end of 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 the second embodiment can be seen in FIG. Figure 3, no further details will be given 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 the third embodiment can be seen in Figure 3 , which will not be described in detail in this embodiment.

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

[0083] In the above structure, the resistor unit 122 and capacitor unit 123 of 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 abnormality of the DC motor simulation detector.

[0084] In all the above embodiments, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expression of such relative terms will not be elaborated in the embodiments of this application.

[0085] It should be understood that expressions such as "in one embodiment", "in this embodiment", "in an embodiment of the present application", or "as an optional implementation method" mentioned throughout the specification mean that specific features, structures, or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment", "in this embodiment", "in an embodiment of the present application", or "as an optional implementation method" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for this application.

[0086] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The order of execution 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 the present application.

[0087] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A DC motor simulation detector, characterized in that: Used for detecting the indoor unit of the air conditioner, the DC motor simulation detector includes: A voltage detection light-emitting module (11), wherein the voltage detection light-emitting module (11) comprises a voltage-stabilizing diode and a light-emitting element connected in series; an oscillation module (12), the oscillation module (12) being connected to the voltage detection light-emitting module (11) and being 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 mainboard (20) of the air conditioner indoor unit to be detected.

2. The DC motor simulation detector according to claim 1, characterized in that: The voltage detection light emitting module (11) comprises 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 voltage stabilizing 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 detected, 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 detected, 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 detected.

3. The DC motor simulation detector according to claim 2, characterized in that: The first voltage detection light-emitting unit (111) comprises a first light-emitting element, a first resistor and a first voltage-stabilizing diode which are connected in series.

4. The DC motor simulation detector according to claim 2, characterized in that: The second voltage detection light-emitting unit (112) comprises a second light-emitting element, a second resistor and a second voltage-stabilizing diode which are connected in series.

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

6. The DC motor simulation detector according to any one of claims 1 to 5, characterized in that: The oscillation module (12) comprises an oscillation unit (121), a resistance unit (122) and a capacitance unit (123); the resistance unit (122) and the capacitance unit (123) are both connected to the oscillation unit (121); and the resistance unit (122) is connected to the capacitance 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. A first end of the fifth resistor is connected to the oscillation unit (121), and a second end of the fifth resistor is connected to a first end of the second capacitor; A first end of the sixth resistor is connected to the oscillation unit (121), and a second end of the sixth resistor is connected to a 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 to 5, characterized in that: The DC motor simulation detector further comprises a self-test light emitting module (13), the self-test light emitting module (13) being connected to the oscillation module (12), and the self-test light emitting module (13) being used to connect to a mainboard (20) of an air conditioner indoor unit to be tested.

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

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