Fault test circuit for blower controller

Abstract

The utility model discloses a fault test circuit for an air blower controller, which relates to the field of air blowers, and comprises an air blower simulation module used for simulating the working state of an air blower and outputting corresponding voltage feedback signals according to air blower control signals and air blower voltage signals sent by the air blower controller; the gear display module comprises indicator lamp units corresponding to a plurality of gears; the controller is used for controlling the corresponding indicating lamp unit to light according to the voltage feedback signal and the blower voltage signal; according to the utility model, the corresponding voltage feedback signal is output according to the air blower control signal, so that a real air blower does not need to be used in the test process, thereby reducing the test cost and improving the test safety and convenience.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of air blower, especially to a fault test circuit for air blower controller. BACKGROUND

[0002] In the process of verifying and testing the air blower control circuit, the traditional method usually involves using actual air blower loads for testing. However, this approach has some obvious defects and shortcomings:

[0003] 1. Volume and weight issues: Actual air blower loads are often large in volume and heavy, which makes them inconvenient to coordinate in terms of resources, such as requiring additional manpower and resources when moving or setting up between different test locations. 2. Poor portability: Due to the above reasons, these devices are not convenient to carry, especially when on-site testing is required or when the testing environment is limited. 3. Low efficiency: Using actual air blowers for testing can result in low testing efficiency due to preparation time and setup complexity. In addition, if problems occur during testing, it may take more time to determine whether the problem is from the testing device itself or the object being tested. 4. Cost factor: The purchase, maintenance, and transportation of large air blowers as test loads also increase costs. 5. Application limitations: For certain testing needs in specific application scenarios (such as rapid detection on the production line), traditional methods may not meet the requirements. SUMMARY

[0004] In order to simplify the testing process of the air blower control circuit (i.e. the air blower controller), improve testing efficiency and reduce testing costs, the utility model provides a fault test circuit for air blower controller, comprising:

[0005] An air blower simulation module for simulating the working state of the air blower and outputting corresponding voltage feedback signals according to the air blower control signals and air blower voltage signals from the air blower controller;

[0006] A gear display module including a plurality of gear corresponding indicator light units; for controlling the corresponding indicator light units to light up according to the voltage feedback signals and air blower voltage signals.

[0007] Further, the air blower simulation module comprises:

[0008] A first resistor for simulating the air blower;

[0009] The air blower simulation module is specifically configured to control the voltage value across the first resistor according to the air blower control signals and air blower voltage signals; the voltage value across the first resistor is the voltage feedback signal.

[0010] Further, the blower simulation module further comprises a first MOS tube; the blower simulation module is specifically used for controlling the on-off degree of the first MOS tube according to the blower control signal sent by the blower controller, and controlling the voltage value of the first resistor based on the on-off degree of the first MOS tube.

[0011] Further, the gear display module further comprises:

[0012] MCU unit;

[0013] The first signal receiving unit is used for accessing the blower voltage signal sent by the blower controller and inputting the MCU unit;

[0014] The second signal receiving unit is used for accessing the voltage feedback signal output by the blower simulation module and inputting the MCU unit.

[0015] Further, the MCU unit is used for performing analog-digital conversion on the input voltage feedback signal and the blower voltage signal, and controlling the corresponding indicator light unit to light up according to the converted signal.

[0016] Further, the blower simulation module comprises:

[0017] The plug, the second resistor R2, the first electrolytic capacitor E1, the second electrolytic capacitor E2, the first capacitor C1 and the second capacitor C2; wherein:

[0018] One end of the second resistor R2 accesses the blower control signal FAN_CTR sent by the blower controller through the plug; the other end of the second resistor R2 is sequentially connected with: the connection end of the first electrolytic capacitor E1 and the second electrolytic capacitor E2, the connection end of the first capacitor C1 and the second capacitor C2, one end of the third resistor R3, and the gate of the first MOS tube Q1;

[0019] The other end of the second electrolytic capacitor E2, the other end of the second capacitor C2, the other end of the third resistor R3 and the drain of the first MOS tube Q1 are all grounded;

[0020] One end of the first resistor R1 accesses the gear display module, and is connected with: the source of the first MOS tube Q1, the other end of the first capacitor C1, and the other end of the first electrolytic capacitor E1, and then connected to the blower controller through the plug;

[0021] The other end of the first resistor R1 accesses the gear display module, and accesses the blower voltage signal sent by the blower controller through the plug.

[0022] Further, the first signal receiving unit comprises:

[0023] The sixth resistor R6, the seventh resistor R7 and the third capacitor C3; wherein:

[0024] One end of the sixth resistor R6 is connected with the other end of the first resistor R1 in the blower simulation module, and the other end is sequentially connected with one end of the seventh resistor R7 and one end of the third capacitor C3 and then connected to the MCU unit, and the other end of the seventh resistor R7 is commonly grounded with the other end of the third capacitor C3.

[0025] Further, the second signal receiving unit comprises:

[0026] The ninth resistor R9, the eleventh resistor R11 and the fourth capacitor C4, wherein:

[0027] One end of the ninth resistor R9 is connected with one end of the first resistor R1 in the blower simulation module, and the other end is sequentially connected with one end of the eleventh resistor R11 and one end of the fourth capacitor C4 and then connected to the MCU unit, and the other end of the eleventh resistor R11 is commonly grounded with the other end of the fourth capacitor C4.

[0028] Further, the indicator light unit comprises a fourth resistor R4, an eighth resistor R8, a first triode TR1, a fifth resistor R5 and a first LED lamp DL1, wherein:

[0029] One end of the fourth resistor R4 is connected with the MCU unit, and the other end is sequentially connected with one end of the eighth resistor R8 and the base of the first triode TR1; the other end of the eighth resistor R8 is commonly grounded with the emitter of the first triode TR1; the collector of the first triode TR1 is connected with one end of the fifth resistor R5; the other end of the fifth resistor R5 is connected with the negative electrode end of the first LED lamp DL1; and the positive electrode end of the first LED lamp DL1 is connected with the positive electrode power supply.

[0030] Further, the blower simulation module further comprises a voltmeter, which is connected in parallel across the first resistor R1, for measuring and displaying the voltage value across the first resistor R1.

[0031] Compared with the prior art, the utility model at least has the following beneficial effects:

[0032] (1) The fault test circuit of the utility model, including: blower simulation module, for simulating the working state of the blower, and outputting corresponding voltage feedback signal according to the blower control signal and the blower voltage signal of the blower controller;Gear display module, which comprises a plurality of gear corresponding indicator light units;For controlling the corresponding indicator light unit according to the voltage feedback signal and the blower voltage signal to light up;That is, the utility model outputs corresponding voltage feedback signal according to the blower control signal, and this design makes it unnecessary to use real blower in the test process, thereby reducing the test cost and improving the safety and convenience of the test.

[0033] (2) The blower fan simulation module in the utility model controls the on-off degree of the first MOS tube according to the blower fan control signal sent by the blower fan controller, and controls the voltage value across the first resistor based on the on-off degree of the first MOS tube, that is, the first resistor and the first MOS tube realize simulation of the actual working state of the blower fan, thereby avoiding the use of the real blower fan in the testing process, greatly reducing the testing cost, and improving the testing efficiency and the convenience of testing;

[0034] (3) The gear display module in the utility model directly displays the current air volume gear through a plurality of indicator light units, so that the user can quickly understand the working state of the blower fan; different air volumes correspond to different gears, and after the voltage feedback signal and the blower fan voltage signal are processed by the MCU unit, the corresponding LED light is lit, so that the operator can obtain accurate information in time;

[0035] (4) The MCU unit in the utility model is responsible for receiving the voltage feedback signal from the blower fan simulation module and the blower fan voltage signal from the blower fan controller, and performing analog-digital conversion on the signals, in this way, the signals can be processed with high precision, and the state of each indicator light unit is controlled according to the conversion result, so that the response speed and accuracy of circuit processing are ensured;

[0036] (5) Electrolytic capacitors, ordinary capacitors and other elements are introduced into the blower fan simulation module for filtering and smoothing voltage fluctuations, so as to ensure the stability of the entire circuit operation, in addition, the on-off degree of the first MOS tube is controlled by the blower fan control signal sent by the blower fan controller, which realizes effective adjustment of the voltage value across the simulated load resistor R1, and further enhances the reliability of circuit processing;

[0037] (6) The voltmeter provided in the utility model can directly measure and display the voltage value across the first resistor R1, providing engineers with a real-time monitoring means, which is helpful for parameter adjustment and fault troubleshooting during the development stage. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a circuit structure diagram of a fault test circuit for a blower fan controller. DETAILED DESCRIPTION

[0039] The following is a specific embodiment of the present application and further describes the technical scheme of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0040] In order to avoid the use of the real blower fan in the testing process of the blower fan controller, reduce the testing cost, and improve the testing efficiency and the convenience of testing, like Figure 1As shown, the application provides a fault test circuit for a blower controller, comprising:

[0041] a blower simulation module for simulating the working state of the blower and outputting a voltage feedback signal FAN_FB corresponding to the blower control signal FAN_CTR and the blower voltage signal +12V outputted by the blower controller;

[0042] The blower simulation module comprises:

[0043] a first resistor R1 for simulating the blower;

[0044] The blower simulation module is specifically configured to control the voltage value between the first resistor R1 according to the blower control signal FAN_CTR and the blower voltage signal +12V, and the voltage value between the first resistor R1 is the voltage feedback signal FAN_FB.

[0045] The blower simulation module further comprises a first MOS tube, and the blower simulation module is specifically configured to control the on-off degree of the first MOS tube according to the blower control signal FAN_CTR outputted by the blower controller, and control the voltage value between the first resistor R1 based on the on-off degree of the first MOS tube.

[0046] The blower simulation module comprises:

[0047] a connector, a second resistor R2, a first electrolytic capacitor E1, a second electrolytic capacitor E2, a first capacitor C1 and a second capacitor C2; wherein:

[0048] One end of the second resistor R2 is connected to the blower control signal FAN_CTR outputted by the blower controller through the connector; the other end of the second resistor R2 is sequentially connected to: the connection end of the first electrolytic capacitor E1 and the second electrolytic capacitor E2, the connection end of the first capacitor C1 and the second capacitor C2, one end of the third resistor R3, and the gate of the first MOS tube Q1;

[0049] The other end of the second electrolytic capacitor E2, the other end of the second capacitor C2, the other end of the third resistor R3 and the drain of the first MOS tube Q1 are all grounded;

[0050] One end of the first resistor R1 is connected to the gear display module, and after being connected to: the source of the first MOS tube Q1, the other end of the first capacitor C1, and the other end of the first electrolytic capacitor E1, the first resistor R1 is connected to the blower controller through the connector;

[0051] The other end of the first resistor R1 is connected to the gear display module, and the blower voltage signal +12V outputted by the blower controller is connected to the first resistor R1 through the connector.

[0052] The blower simulation module further comprises a voltmeter connected in parallel across the first resistor R1 for measuring and displaying the voltage across the first resistor R1.

[0053] The gear display module comprises a plurality of indicator light units corresponding to gears; and the corresponding indicator light unit is controlled to be lighted according to the voltage feedback signal FAN_FB and the blower voltage signal +12V.

[0054] The gear display module further comprises:

[0055] The MCU unit;

[0056] The first signal receiving unit is configured to access the blower voltage signal +12V sent by the blower controller and input the MCU unit.

[0057] The first signal receiving unit comprises:

[0058] The sixth resistor R6, the seventh resistor R7 and the third capacitor C3; wherein:

[0059] One end of the sixth resistor R6 is connected to the other end of the first resistor R1 in the blower simulation module, and the other end is sequentially connected to one end of the seventh resistor R7 and one end of the third capacitor C3 and then input to the MCU unit; the other end of the seventh resistor R7 and the other end of the third capacitor C3 are commonly grounded.

[0060] The second signal receiving unit is configured to access the voltage feedback signal FAN_FB output by the blower simulation module and input the MCU unit.

[0061] The second signal receiving unit comprises:

[0062] The ninth resistor R9, the eleventh resistor R11 and the fourth capacitor C4; wherein:

[0063] One end of the ninth resistor R9 is connected to one end of the first resistor R1 in the blower simulation module, and the other end is sequentially connected to one end of the eleventh resistor R11 and one end of the fourth capacitor C4 and then input to the MCU unit; the other end of the eleventh resistor R11 and the other end of the fourth capacitor C4 are commonly grounded.

[0064] The MCU unit is configured to perform analog-to-digital conversion on the input voltage feedback signal and the blower voltage signal, and control the corresponding indicator light unit to be lighted according to the converted signal.

[0065] The indicator light unit comprises a fourth resistor R4, an eighth resistor R8, a first triode TR1, a fifth resistor R5 and a first LED lamp DL1; wherein:

[0066] One end of the fourth resistor R4 is connected with the MCU unit, and the other end is connected with one end of the eighth resistor R8 and the base of the first triode TR1 in sequence; the other end of the eighth resistor R8 is connected with the emitter of the first triode TR1 and is grounded in common; the collector of the first triode TR1 is connected with one end of the fifth resistor R5; the other end of the fifth resistor R5 is connected with the negative electrode end of the first LED lamp DL1; the positive electrode end of the first LED lamp DL1 is connected with the positive electrode power supply.

[0067] The working process of the whole fault test circuit is as follows:

[0068] 1, the input and control of the blower control signal FAN_CTR:

[0069] The blower control signal FAN_CTR is a different amplitude level signal given by the controller of the product to be tested (i.e. the blower controller). Different level amplitude ranges correspond to different air volume positions.

[0070] This FAN_CTR signal is connected with one end of the second resistor R2 in the blower simulation module through the connector, and then passes through the first electrolytic capacitor E1, the second electrolytic capacitor E2, the first capacitor C1, the second capacitor C2 and the third resistor R3 in sequence, and finally reaches the gate of the first MOS tube Q1.

[0071] According to the level amplitude of the FAN_CTR signal, the conduction degree of the first MOS tube Q1 is controlled, and then the voltage between the first resistor R1 (i.e. the FAN_FB signal) is adjusted.

[0072] 2, transmission and feedback of FAN_FB signal:

[0073] The voltage signal between the first resistor R1 (FAN_FB) is given to the MCU unit and the blower controller at the same time:

[0074] Given to the MCU unit: for internal processing and position display control;

[0075] Given to the blower controller: form a loop to ensure normal operation of the circuit, and the voltage signal can be further transmitted by the controller to the upper computer for monitoring and judgment;

[0076] 3, processing and LED display of the MCU unit:

[0077] The MCU unit receives signals from the first signal receiving unit (the sixth resistor R6, the seventh resistor R7 and the third capacitor C3) and the second signal receiving unit (the ninth resistor R9, the eleventh resistor R11 and the fourth capacitor C4) of the gear display module, which are respectively FAN_FB and the blower voltage signal. The MCU unit performs analog-to-digital conversion on the two signals, and calculates the AD difference between the two signals according to the converted signals, and determines the current air volume gear according to the AD difference. Specifically, determining the current air volume gear according to the AD difference includes: determining the current air volume gear by judging the preset range in which the AD difference is located; different preset ranges correspond to different air volume gears.

[0078] Then, the MCU outputs corresponding control signals to make the corresponding triode conductive, so as to light up the LED lamp of the corresponding gear, thereby realizing the visual display of the gear.

[0079] If the gear indicated by the FAN_CTR signal is consistent with the gear represented by the actually lit LED, it indicates that the working state of the measured blower controller is normal, and the blower controller can correctly send control signals.

[0080] The fault test circuit of the utility model, include: blower simulation module, for simulating the working state of the blower, and according to the blower controller sends the blower control signal and the blower voltage signal output corresponding voltage feedback signal;Gear display module, it includes a plurality of gear corresponding indicator light unit;For according to the voltage feedback signal and the blower voltage signal control corresponding indicator light unit light;That is, the utility model according to the blower control signal output corresponding voltage feedback signal, this design makes it unnecessary to use real blower in the test process, thereby reduce the test cost and improve the safety and convenience of test.

[0081] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0082] In addition, in the present application, the description such as "first", "second", "one" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0083] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be internal communication of two elements or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0084] In addition, the technical solutions among various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the present application.

Claims

1. A fault test circuit for a blower controller, characterized by, The application relates to a fan simulation module for simulating the working state of a fan and outputting a corresponding voltage feedback signal according to a fan control signal and a fan voltage signal output by a fan controller; and a gear display module including a plurality of indicator lamp units corresponding to gears; the gear display module is used for controlling the corresponding indicator lamp units to light up according to the voltage feedback signal and the fan voltage signal. The fan simulation module includes a first resistor for simulating the fan. The fan simulation module is specifically used for controlling the voltage value across the first resistor according to the fan control signal and the fan voltage signal; the voltage value across the first resistor is the voltage feedback signal.

2. A fault testing circuit for a blower controller according to claim 1, wherein, The fan simulation module further includes a first MOS tube; the fan simulation module is specifically used for controlling the on-off degree of the first MOS tube according to the fan control signal output by the fan controller, and controlling the voltage value across the first resistor based on the on-off degree of the first MOS tube. The gear display module further includes an MCU unit; a first signal receiving unit for accessing the fan voltage signal output by the fan controller and inputting the MCU unit; and a second signal receiving unit for accessing the voltage feedback signal output by the fan simulation module and inputting the MCU unit. The MCU unit is used for analog-digital conversion of the input voltage feedback signal and the fan voltage signal, and controls the corresponding indicator lamp units to light up according to the converted signals.

3. A fault testing circuit for a blower controller according to claim 2, wherein, The fan simulation module includes a connector, a second resistor R2, a first electrolytic capacitor E1, a second electrolytic capacitor E2, a first capacitor C1 and a second capacitor C2; wherein: one end of the second resistor R2 is connected to the fan control signal FAN_CTR output by the fan controller through the connector; the other end of the second resistor R2 is sequentially connected to the connection end of the first electrolytic capacitor E1 and the second electrolytic capacitor E2, the connection end of the first capacitor C1 and the second capacitor C2, one end of a third resistor R3 and the gate of a first MOS tube Q1; the other end of the second electrolytic capacitor E2, the other end of the second capacitor C2, the other end of the third resistor R3 and the drain of the first MOS tube Q1 are grounded; one end of a first resistor R1 is connected to the gear display module and is connected to the source of the first MOS tube Q1, the other end of the first capacitor C1 and the other end of the first electrolytic capacitor E1, and then connected to the fan controller through the connector; the other end of the first resistor R1 is connected to the gear display module and connected to the fan voltage signal output by the fan controller through the connector.

4. A fault testing circuit for a blower controller according to claim 3, wherein, The first signal receiving unit includes a sixth resistor R6, a seventh resistor R7 and a third capacitor C3; wherein: one end of the sixth resistor R6 is connected to the other end of the first resistor R1 in the fan simulation module, and the other end is sequentially connected to one end of the seventh resistor R7 and one end of the third capacitor C3 and then connected to the MCU unit; the other end of the seventh resistor R7 and the other end of the third capacitor C3 are grounded. The second signal receiving unit includes a ninth resistor R9, an eleventh resistor R11 and a fourth capacitor C4; wherein: ​ ​ 5. A fault testing circuit for a blower controller according to claim 4, wherein, ​ 6. A fault testing circuit for a blower controller according to claim 5, wherein, ​ ​ ​ ​ ​ ​ 7. A fault testing circuit for a blower controller according to claim 6, wherein, ​ ​ ​ 8. A fault testing circuit for a blower controller according to claim 7, wherein, ​ ​ One end of the ninth resistor R9 is connected with one end of the first resistor R1 in the blower simulation module, and the other end is connected with one end of the eleventh resistor R11 and one end of the fourth capacitor C4 in turn and then connected with the MCU unit; the other end of the eleventh resistor R11 is grounded together with the other end of the fourth capacitor C4.

9. A fault testing circuit for a blower controller according to claim 8, wherein, The indicator light unit comprises a fourth resistor R4, an eighth resistor R8, a first triode TR1, a fifth resistor R5 and a first LED light DL1; wherein: One end of the fourth resistor R4 is connected with the MCU unit, and the other end is connected with one end of the eighth resistor R8 and the base of the first triode TR1 in turn; the other end of the eighth resistor R8 is grounded together with the emitter of the first triode TR1; one end of the fifth resistor R5 is connected with the collector of the first triode TR1; the other end of the fifth resistor R5 is connected with the negative electrode end of the first LED light DL1; the positive electrode end of the first LED light DL1 is connected with the positive electrode power supply.

10. A fault testing circuit for a blower controller according to claim 6, wherein, The blower simulation module further comprises a voltmeter, which is connected in parallel across the first resistor R1, for measuring and displaying the voltage value across the first resistor R1.

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