Fan control detection device and image forming apparatus

Abstract

The invention discloses a fan control detection device and image forming equipment. The fan control detection device is used for being connected with a fan assembly. The fan control detection device is provided with a control end and a detection end, and is used for connecting the control end with the power input end of the fan assembly and connecting the detection end with the feedback end of the fan assembly under the condition that the connection sequence is correct; the fan control detection device is further used for detecting the received electric signal through the detection end when the drive control signal is not sent to the fan assembly through the control end; and according to the signal state of the electric signal, whether sequence connection errors exist in the control end and the detection end relative to the fan assembly or not is determined. According to the fan control detection device, the functions of the fan control detection device can be more complete, and meanwhile, the troubleshooting cost during abnormity can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of fan detection, and particularly to a fan control detection device and an image forming apparatus. Background Art

[0002] In the traditional technology, among the cooling fans inside the equipment products, some adopt three-wire fans with feedback status. In addition to the control signal and the ground terminal, there is also a status detection signal terminal in the three wires. However, due to reasons such as production and assembly, it is easy to cause the problem of reverse socket insertion, resulting in abnormal control and detection, affecting the normal use of the equipment products and the production efficiency. Summary of the Invention

[0003] Aiming at the above problems, the main purpose of this application is to provide a fan control detection device and an image forming apparatus that can be used to detect whether there is a connection sequence problem.

[0004] In one embodiment, this application provides a fan control detection device for connecting with a fan assembly;

[0005] The fan control detection device is provided with a control end and a detection end, which are used to connect the power input end of the fan assembly at the control end and the feedback end of the fan assembly at the detection end when the connection sequence is correct;

[0006] The fan control detection device is further used to detect the received electrical signal through the detection end when a drive control signal is not sent to the fan assembly through the control end; and determine whether there is a connection sequence error of the control end and the detection end relative to the fan assembly according to the signal state of the electrical signal.

[0007] In one of the embodiments, the fan detection device is further used to output a connection sequence error message when it is determined that there is a connection sequence error of the control end and the detection end relative to the fan assembly.

[0008] In one of the embodiments, determining whether there is a connection sequence error of the control end and the detection end relative to the fan assembly according to the signal state of the electrical signal includes:

[0009] According to the signal state of the electrical signal, if the signal state of the electrical signal is different from the first preset state, it is determined that there is a connection sequence error of the control end and the detection end relative to the fan assembly.

[0010] In one of the embodiments, determining whether there is a connection sequence error of the control end and the detection end relative to the fan assembly according to the signal state of the electrical signal further includes:

[0011] According to the signal state of the electrical signal, if the signal state of the electrical signal is the same as the first preset state, it is determined that the connection sequence of the control end and the detection end relative to the fan assembly is correct.

[0012] In one embodiment, the cases of incorrect connection sequence include any one of the following: the control terminal is connected to the feedback terminal, and the detection terminal is connected to the power input terminal; the control terminal is connected to the power input terminal, and the detection terminal is connected to the ground terminal of the fan assembly; the control terminal is connected to the ground terminal of the fan assembly, and the detection terminal is connected to the power input terminal.

[0013] In one embodiment, the first preset state is a high-level state.

[0014] In one embodiment, the fan control detection device includes: a control module and a detection module;

[0015] The detection module includes a pull-up resistor; one end of the pull-up resistor is used to connect to an external power supply, the other end of the pull-up resistor is grounded, and is connected to the input terminal of the control module and serves as the detection terminal. When the connection sequence is correct and no drive control signal is sent to the fan assembly through the control terminal, the signal state of the electrical signal received by the detection terminal is in a high-level state; when the connection sequence is incorrect and no drive control signal is sent to the fan assembly through the control terminal, the signal state of the electrical signal received by the detection terminal is in a low-level state;

[0016] The control terminal of the control module serves as the control terminal of the fan control detection device.

[0017] In one embodiment, the fan control detection device is further configured to, when it is determined that the connection sequence is correct, start sending a drive control signal to the fan assembly through the control terminal to control the operation of the fan assembly, and detect the received electrical signal through the detection terminal during the operation; and determine whether there is an abnormality in the fan assembly according to the signal state of the electrical signal.

[0018] In one embodiment, determining whether there is an abnormality in the fan assembly according to the signal state of the electrical signal includes:

[0019] According to the signal state of the electrical signal, if the signal state of the electrical signal is the same as the second preset state, it is determined that there is an abnormality in the fan assembly.

[0020] In another embodiment, the present application further provides an image forming apparatus including the fan control detection device.

[0021] A fan control detection device and an image forming apparatus provided by the present application at least have the following technical effects:

[0022] When the fan control detection device is correctly connected, its control terminal is connected to the power input terminal of the fan assembly, and the detection terminal is connected to the feedback terminal of the fan assembly. When the fan control detection device does not send a drive control signal to the fan assembly through the control terminal, it detects the received electrical signal through the detection terminal, and then determines whether there is an incorrect connection sequence according to the signal state of the electrical signal. In each embodiment of the present application, the fan control detection device can detect the signal state of the detection terminal and judge the connection sequence when the fan assembly is not started, so as to prevent the problem of incorrect connection sequence between the fan control detection device and the fan assembly wiring. The present application can make the function of the fan control detection device more perfect, and at the same time help to reduce the cost of troubleshooting during anomalies. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic connection structure diagram of the fan control detection device provided by an embodiment of the present application;

[0024] Figure 2 It is another schematic connection structure diagram of the fan control detection device provided by an embodiment of the present application;

[0025] Figure 3 It is a specific connection diagram of the fan control detection device provided by an embodiment of the present application;

[0026] Figure 4 It is another specific connection diagram of the fan control detection device provided by an embodiment of the present application;

[0027] Figure 5 It is a schematic connection structure diagram of the drive detection circuit of the fan assembly provided by an embodiment of the present application;

[0028] Figure 6 It is a schematic connection structure diagram of the detection module of the fan control detection device provided by an embodiment of the present application;

[0029] Figure 7 It is a schematic connection structure diagram of the fan control detection device with correct connection sequence provided by an embodiment of the present application;

[0030] Figure 8 It is a schematic connection structure diagram of the fan control detection device with incorrect connection sequence provided by an embodiment of the present application;

[0031] Figure 9 It is a schematic connection structure diagram of the control module of the fan control detection device provided by an embodiment of the present application;

[0032] Figure 10 It is a flowchart of the execution method of the fan control detection device provided by an embodiment of the present application;

[0033] Figure 11 It is a schematic structure diagram of an image forming apparatus provided by another embodiment of the present application. Detailed implementation manners

[0034] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] In the description of the present application, unless otherwise clearly specified and limited, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; unless otherwise specified or stated, the term "plurality" means two or more; the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Refer to Figure 1 , the present application provides a fan control detection device for connecting to a fan assembly; the fan control detection device is provided with a control end and a detection end, and is used to connect the power input end of the fan assembly to the control end and the feedback end of the fan assembly to the detection end when the connection sequence is correct.

[0037] The fan control detection device is further used to detect the received electrical signal through the detection end when a drive control signal is not sent to the fan assembly through the control end; and determine whether there is an incorrect connection sequence of the control end and the detection end relative to the fan assembly according to the signal state of the electrical signal.

[0038] When a drive control signal is not sent to the fan assembly through the control end, it means that the operation of the fan assembly is not started. The incorrect connection sequence includes that when the control end and the detection end are connected to the fan assembly, they are not connected to the corresponding ports. For example, the control end is connected to the feedback end and the detection end is connected to the power input end; or the control end is connected to the power input port, but the detection end is connected to the ground end of the fan assembly.

[0039] In order to enable the fan assembly to have a feedback detection function so that a signal different from that during normal operation can be detected when the fan stops rotating, a pull-up circuit is provided in the drive detection circuit of the internal circuit structure of the fan assembly, or the feedback terminal of the drive detection circuit, that is, the feedback terminal of the fan assembly, is connected to the detection terminal of the fan control detection device through an external pull-up circuit during use. When the fan is not running or is abnormally blocked, the drive detection circuit inside the fan assembly is in an unconducted state. At this time, the signal state of the electrical signal received by the detection terminal through the feedback terminal is a signal state higher than a certain voltage value, or a high-level state. That is, if the connection sequence is correct and no drive control signal is output to make the fan run, the signal state of the electrical signal received by the detection terminal of the fan control detection device should also be like this. However, when the connection sequence is incorrect, for example, the detection terminal is connected to the power input terminal or the ground terminal of the fan assembly. Since the power input terminal is the input terminal of the motor winding in the fan assembly and the other end of the motor winding is grounded, at this time, since no drive control signal is input to the input terminal, the signal state of the electrical signal received by the detection terminal is a signal state lower than a certain voltage value, or a low-level state.

[0040] Furthermore, when the fan control detection device does not send a drive control signal to the fan assembly through the control terminal, after receiving the electrical signal at the detection terminal, according to the signal state of the electrical signal, it can determine whether there is an incorrect connection sequence between the control terminal and the detection terminal relative to the fan assembly by judging whether the voltage value of the electrical signal is higher than a certain voltage value, or whether it is a high-level state, or whether it is the same as the signal state of the electrical signal that should be received by the detection terminal when the connection sequence is correct.

[0041] Further, due to the reason of the internal circuit structure of the fan assembly, when the connection sequence is incorrect, the fan control detection device outputs a drive control signal to the fan assembly, but the fan cannot run. However, at this time, the electrical signal received by the detection terminal is the same as the signal state of the electrical signal output by the feedback terminal of the fan assembly when the fan runs smoothly under the correct connection sequence. Furthermore, when the connection sequence is incorrect, if a drive control signal is output to the fan assembly to start the fan running, the electrical signal detected by the detection terminal is an incorrect feedback signal, which will lead to misjudgment of information and cause other related faults to be reported.

[0042] In the fan control detection device according to the embodiment of the present application, when the connection sequence is correct, its control end is connected to the power input end of the fan assembly, and the detection end is connected to the feedback end of the fan assembly. When the fan control detection device does not send a drive control signal to the fan assembly through the control end, it detects the received electrical signal through the detection end, and then determines whether there is an incorrect connection sequence according to the signal state of the electrical signal. The fan control detection device according to the embodiment of the present application can detect the signal state of the detection end and judge the connection sequence when the fan assembly is not started, so as to prevent the problem of incorrect connection sequence between it and the fan assembly. The embodiment of the present application can make the function of the fan control detection device more perfect, reduce misjudgment, and at the same time help reduce the cost of troubleshooting in case of abnormality.

[0043] In a specific embodiment, the fan control detection device is further configured to output an incorrect connection sequence message when it is determined that there is an incorrect connection sequence of the control end and the detection end relative to the fan assembly.

[0044] The fan control detection device according to the embodiment of the present application can make the function more perfect, and at the same time help reduce the cost of troubleshooting in case of abnormality and reduce the occurrence of misjudgment.

[0045] Furthermore, outputting the incorrect connection sequence message can play a role in reminding or alarming.

[0046] In a specific embodiment, determining whether there is an incorrect connection sequence of the control end and the detection end relative to the fan assembly according to the signal state of the electrical signal includes:

[0047] According to the signal state of the electrical signal, if the signal state of the electrical signal is different from the first preset state, it is determined that there is an incorrect connection sequence of the control end and the detection end relative to the fan assembly.

[0048] In the embodiment of the present application, the first preset state is set in advance. The first preset state can be a voltage value higher than a certain voltage value, or a high-level state, etc., which represents the signal state of the electrical signal that should be received by the detection end in the case of correct connection sequence. Furthermore, when the drive control signal is not sent to the fan assembly through the control end, if it is detected that the signal state of the electrical signal received by the detection end is different from the first preset state, it can be determined that the connection sequence is incorrect.

[0049] The detection method of the fan control detection device according to the embodiment of the present application is relatively simple and easy to implement, which can help to timely and effectively detect incorrect line connections, reduce misjudgment, help optimize fault troubleshooting, and reduce the labor cost of fault troubleshooting.

[0050] In a specific embodiment, determining whether there is an incorrect connection sequence of the control end and the detection end relative to the fan assembly according to the signal state of the electrical signal further includes:

[0051] According to the signal state of the electrical signal, if the signal state of the electrical signal is the same as the first preset state, it is determined that the connection sequence of the control terminal and the detection terminal relative to the fan assembly is correct.

[0052] In the embodiment of the present application, when no drive control signal is sent to the fan assembly through the control terminal, if it is detected that the signal state of the electrical signal received by the detection terminal is the same as the first preset state, it can be determined that the connection sequence is correct.

[0053] The fan control detection device of the embodiment of the present application has a relatively simple and easy-to-implement detection method, which helps to timely and effectively detect wiring connection errors, reduce misjudgment, optimize fault troubleshooting, and reduce the labor cost of fault troubleshooting.

[0054] In a specific embodiment, the situations of incorrect connection sequence include: the control terminal is connected to the feedback terminal, and the detection terminal is connected to the power input terminal; the control terminal is connected to the power input terminal, and the detection terminal is connected to the ground terminal of the fan assembly; the control terminal is connected to the ground terminal of the fan assembly, and the detection terminal is connected to the power input terminal, any one of which.

[0055] Generally, what is more likely to cause misjudgment is that the detection terminal of the fan control detection device is not connected to the feedback terminal of the fan assembly, but is connected to the power input terminal or the ground terminal, thus causing incorrect connection sequence.

[0056] For example, referring to Figure 2 , according to the arrangement of the socket pin ports, the correct connection sequence is as follows:

[0057]

[0058] When the connection sequence is incorrect, for example, reverse connection occurs, as shown in the following table:

[0059]

[0060] For example, in the case of the incorrect connection sequence of the above reverse connection, if a drive control signal is output to the fan assembly to start the fan operation, the electrical signal detected by the detection terminal is an incorrect feedback signal, which will lead to misjudgment of information and cause other associated faults to be reported.

[0061] The fan control detection device of the embodiment of the present application has a relatively simple and easy-to-implement detection method, which helps to timely and effectively detect wiring connection errors, reduce misjudgment, optimize fault troubleshooting, and reduce the labor cost of fault troubleshooting.

[0062] Referring to Figure 3 , Figure 4 and Figure 5 , in a specific embodiment, the first preset state is a high-level state.

[0063] In an embodiment of the present application, the fan assembly includes a motor winding circuit 310 and a drive detection circuit 320 that are connected to each other. Pin 1 of the drive detection circuit 320 serves as the feedback terminal WHITE-RD of the fan assembly. The drive detection circuit 320 is provided with a pull-up circuit such as Figure 5 the pull-up resistor R1 shown, or in use, its pin 1 is connected to the detection terminal FAN_PWM_Z of the fan control detection device through an external pull-up circuit. Thus, the fan assembly is provided with a feedback detection function, enabling a signal different from the normal operation state to be output when the fan stops rotating.

[0064] Specifically, as Figure 3 shown, when the connection sequence is correct, one end of the motor winding circuit 310 serves as the power input terminal RED+ for connecting to the control terminal FAN_PWM_Z of the fan control detection device. The other end of the motor winding circuit 310 is grounded and is also connected to drive terminals pin 2 and pin 3 of the drive detection circuit 320. Pin 4 of the drive detection circuit 320 serves as the ground terminal BLACK- of the fan assembly and is grounded, and pin 1 serves as the feedback terminal of the fan assembly for connecting to the detection terminal FAN_DET_Z of the fan control detection device. As Figure 5 shown in the schematic diagram of the connection structure of the drive detection circuit 320, pin LOCKEDSIGNAL is pin 1 of the drive detection circuit 320. When the connection sequence is correct and no drive control signal is sent to the fan assembly through the control terminal FAN_PWM_Z, the fan does not start running. At this time, the triode Q1 in the drive detection circuit 320 is not conducting, and the potential of the feedback terminal WHITE-RD is pulled up to a high level state by the pull-up resistor R1. Thus, the signal state of the electrical signal received by the detection terminal FAN_DET_Z is a high level state. Figure 4 As

[0065] shown, when the connection sequence is incorrect, for example, the detection terminal FAN_DET_Z of the fan control detection device is connected to the power input terminal RED+, and the control terminal FAN_PWM_Z of the fan control detection device is connected to the feedback terminal WHITE-RD. At this time, the fan also does not start running, and the triode Q1 is not conducting. However, the pull-up resistor R1 and the motor winding circuit 310 form a voltage dividing circuit, thereby pulling down the potential of the power input terminal to a low level potential. Thus, the signal state of the electrical signal received by the detection terminal FAN_DET_Z is a low level state. Similarly, when the detection terminal is connected to the ground terminal, the potential will also be pulled down to a low level.

[0066] Therefore, the first preset state is set to a high level state, which is convenient for performing signal state detection on the detection terminal and judging the connection sequence. Figure 3 See Figure 4 、 Figure 6 、 Figure 7 and Figure 8, in a specific embodiment, the fan control detection device includes: a control module 330 and a detection module 340;

[0067] The detection module 330 includes a pull-up resistor R4; one end of the pull-up resistor R4 is used to connect to the external power supply EC_3.3V, the other end FAN_DET of the pull-up resistor R4 is grounded, and is connected to the input end of the control module 330 and serves as the detection end FAN_DET_Z. When the connection sequence is correct and no drive control signal is sent to the fan assembly through the control end FAN_PWM_Z, the signal state of the electrical signal received by the detection end FAN_DET_Z is in a high-level state; when the connection sequence is incorrect and no drive control signal is sent to the fan assembly through the control end FAN_PWM_Z, the signal state of the electrical signal received by the detection end FAN_DET_Z is in a low-level state;

[0068] The control end of the control module 330 serves as the control end FAN_PWM_Z of the fan control detection device.

[0069] Among them, the control module 330 and the detection module 340 can be an integrated circuit module, or the two are discrete circuit modules. As Figure 7 shown, when the connection sequence is correct and no drive control signal is sent to the fan assembly through the control end FAN_PWM_Z, the drive detection circuit 320 is not conducting, and the potential of its feedback end WHITE-RD is pulled up to a high level by the pull-up resistor R4, that is, the signal state of the electrical signal received through the detection end FAN_DET_Z is in a high-level state. As Figure 8 shown, when the connection sequence is incorrect, for example, the control end FAN_PWM_Z, the detection end FAN_DET_Z, are reversely connected to the power input end RED+ and the feedback end WHITE-RD. At this time, the motor winding circuit 310 and the pull-up resistor R4 form a voltage-dividing circuit, dividing the external power supply EC_3.3V, and then the potential of the electrical signal detected through the detection end FAN_DET_Z is pulled down, that is, the signal state of the electrical signal received through the detection end FAN_DET_Z is in a low-level state. Another example is that the detection end FAN_DET_Z is connected to the ground end of the drive detection circuit 320. At this time, since the external power supply is connected to the ground, the signal state of the electrical signal received through the detection end FAN_DET_Z is also in a low-level state.

[0070] The fan control detection device according to the embodiment of the present application includes a control module 340 and a detection module 330. The detection module 330 includes a pull-up resistor R4, which can give an initial state to the signal of the connected circuit port to prevent abnormal level determination caused by an uncertain initial state. At the same time, the circuit structure is simple and easy to implement, which can help detect the wiring sequence when the fan is not started, improve the fault detection efficiency, and make the function more perfect.

[0071] See Figure 6 , in a specific embodiment, the detection module 340 further includes a current-limiting resistor R3 and a filtering capacitor C4.

[0072] In a specific embodiment, the fan control detection device is further configured to, when it is determined that the connection sequence is correct, send a drive control signal to the fan assembly through the control end to control the operation of the fan assembly, and detect the received electrical signal through the detection end during the operation; and determine whether there is an abnormality in the fan assembly according to the signal state of the electrical signal.

[0073] The fan control detection device according to the embodiment of the present application can start sending a drive control signal to the fan assembly to start the operation of the fan assembly when it is determined that the connection sequence is correct. Then, abnormal detection is performed according to the signal state of the electrical signal during the operation.

[0074] As Figure 2 shown, during the stable operation of the fan assembly, the internal drive detection circuit is conducting, and the signal state of the electrical signal received by the detection end FAN_DET_Z is in a low level state. When an abnormal stall occurs, the internal drive detection circuit is not conducting, and the signal state of the electrical signal received by the detection end FAN_DET_Z is in a high level state. Specifically, when the drive control signal reaches the preset time after it is determined that the connection sequence is correct, the abnormal detection of the fan assembly can be started. Thus, detection can be performed when the control is stable, improving the detection accuracy.

[0075] Therefore, the fan control detection device according to the embodiment of the present application can perform fan abnormality detection when it is determined that the connection sequence is correct, thereby reducing the occurrence of misjudgment.

[0076] In a specific embodiment, determining whether there is an abnormality in the fan assembly according to the signal state of the electrical signal includes:

[0077] According to the signal state of the electrical signal, if the signal state of the electrical signal is the same as the second preset state, it is determined that there is an abnormality in the fan assembly.

[0078] In the embodiments of the present application, a second preset state is set in advance. The second preset state can be a voltage value higher than a certain voltage value, or a high-level state, etc., which represents the signal state of the electrical signal that should be received by the detection end when the fan is abnormal in the case of correct connection sequence. Further, in the case of correct connection sequence, according to the signal state of the electrical signal, if it is the same as the second preset state, it is determined that there is an abnormality in the fan assembly, otherwise the fan operates normally.

[0079] The fan control detection device of the embodiments of the present application has a relatively simple and easy-to-implement detection method, which can help reduce the occurrence of misjudgment problems, reduce the labor cost of troubleshooting, and improve production efficiency.

[0080] See Figure 3 and Figure 9 As shown in and, in a specific embodiment, the control module 330 includes a first switch circuit 910 and a second switch circuit 920. The control terminal FAN_PWM of the first switch circuit 910 is used to connect to the MCU module, the grounding terminal is grounded, and the output terminal is connected to the input terminal of the second switch circuit 920. The power supply terminal of the second switch circuit 920 is connected to an external power supply, and the output terminal is used as the control terminal FAN_PWM_Z of the control module 330.

[0081] Among them, the first switch circuit 910 includes a triode Q2, and the second switch circuit 920 includes a triode Q3, a resistor R5, and a resistor R6. The base 1 of the triode Q2 serves as the control terminal of the first switch circuit 910, the emitter 2 serves as the grounding terminal, and the collector 3 serves as the output terminal. The connection point of one end of the resistor R5 and the emitter 1 of the triode Q3 serves as the power supply terminal of the second switch circuit 920, the collector 3 of the triode Q3 serves as the output terminal of the second switch circuit 920, the base 1 of the triode Q3 is respectively connected to the other end of the resistor R5 and one end of the resistor R6, and the other end of the resistor R6 serves as the input terminal of the second switch circuit 920. Among them, the triode Q2 is an NPN-type triode, and the triode Q3 is a PNP triode.

[0082] Specifically, the fan control detection device controls the fan assembly by outputting a PWM signal as a drive control signal through the MCU module and adjusting the duty cycle. Different duty cycles control the on and off times of the switch circuit. When the triode Q2 is turned on, the level of its collector 3 is pulled down to the ground. At the same time, the resistor R5 and the resistor R6 form a voltage-dividing circuit to divide the external power supply EC24V. At this time, the level value of the base 1 of the triode Q3 is less than the level value of its emitter 2, and the triode Q3 is turned on, and the collector 3 outputs a voltage to the power input terminal of the fan assembly. When the triode Q2 is turned off, the level of its collector 3 is pulled up to 24V, the voltage values of the emitter 2 and the base 1 of the triode Q3 are the same, the triode Q3 is not turned on, and its collector 3 is at a low level, and the fan assembly does not rotate.

[0083] Specifically, the control module 330 further includes a filtering circuit, which includes a capacitor C1, a capacitor C2, and a capacitor C3. The voltage output by the triode Q3 can output a more stable voltage value through the filtering circuit and provide it to the fan assembly.

[0084] See Figure 10 , in a specific embodiment, the detection method of the fan control detection device according to the embodiment of the present application is as follows:

[0085] Step S800: Start.

[0086] Step S810: Power on and initialize, and output a duty cycle of 0%.

[0087] That is, no drive control signal is output to the fan assembly.

[0088] Step S820: Detect whether the signal state of the received electrical signal is a high-level state through the detection end. If so, execute Step S830. Otherwise, execute Step S850.

[0089] Step S830: Determine that the connection sequence is incorrect.

[0090] Step S840: Output the connection sequence error fault information and execute Step S900.

[0091] Step S850: Start to output the drive control signal, set the target duty cycle, and perform for a preset time.

[0092] Step S860: After reaching the preset time, detect whether the signal state of the received electrical signal is a low level through the detection end. If so, execute Step S870. Otherwise, execute Step S880.

[0093] Step S870: Output the fan fault information and execute Step S900.

[0094] Step S880: Determine that the fan is running normally.

[0095] Step S890: Perform the preheating operation and execute Step S900.

[0096] Step S900: End.

[0097] The fan control detection device according to the embodiment of the present application can make the function of the fan control detection device more perfect, and at the same time helps to reduce the cost of troubleshooting in case of abnormalities.

[0098] See Figure 11 , in an embodiment, the present application further provides an image forming apparatus, including: a fan control detection device.

[0099] The fan control detection device according to the embodiment of the present application is the same as the fan control detection devices described in the above embodiments, and will not be described in detail herein.

[0100] As described above, the above are only specific embodiments of the present application that are preferred. However, the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A fan control detection device, characterized in that, For connection with a fan assembly; The fan control detection device is provided with a control end and a detection end. When the connection sequence is correct, the control end is connected to the power input end of the fan assembly, and the detection end is connected to the feedback end of the fan assembly; The fan control detection device is further configured to detect the received electrical signal through the detection end when a drive control signal is not sent to the fan assembly through the control end; And determine whether there is a connection sequence error of the control end and the detection end relative to the fan assembly according to the signal state of the electrical signal.

2. The fan control detection device according to claim 1, characterized in that The fan control detection device is further configured to output a connection sequence error message when it is determined that there is a connection sequence error of the control end and the detection end relative to the fan assembly.

3. The fan control detection device according to claim 1, wherein Determining whether there is a connection sequence error of the control end and the detection end relative to the fan assembly according to the signal state of the electrical signal includes: According to the signal state of the electrical signal, if the signal state of the electrical signal is different from the first preset state, it is determined that there is a connection sequence error of the control end and the detection end relative to the fan assembly.

4. The fan control detection device according to claim 1, characterized in that Determining whether there is a connection sequence error of the control end and the detection end relative to the fan assembly according to the signal state of the electrical signal further includes: According to the signal state of the electrical signal, if the signal state of the electrical signal is the same as the first preset state, it is determined that the connection sequence of the control end and the detection end relative to the fan assembly is correct.

5. The fan control detection device according to claim 1, characterized in that, The connection sequence error cases include: any one of the control end being connected to the feedback end, the detection end being connected to the power input end; the control end being connected to the power input end, the detection end being connected to the ground end of the fan assembly; the control end being connected to the ground end of the fan assembly, and the detection end being connected to the power input end.

6. The fan control detection device according to any one of claims 3 or 4, characterized in that The first preset state is a high level state.

7. The fan control detection device according to claim 1, characterized in that The fan control detection device includes: a control module and a detection module; The detection module includes a pull-up resistor; one end of the pull-up resistor is used to connect to an external power supply, the other end of the pull-up resistor is grounded, and is connected to the input end of the control module and serves as the detection end. When the connection sequence is correct and a drive control signal is not sent to the fan assembly through the control end, the signal state of the electrical signal received by the detection end is in a high level state; when the connection sequence is incorrect and a drive control signal is not sent to the fan assembly through the control end, the signal state of the electrical signal received by the detection end is in a low level state; The control end of the control module serves as the control end of the fan control detection device.

8. The fan control detection device according to claim 1, characterized in that The fan control detection device is further configured to start sending a drive control signal to the fan assembly through the control end to control the operation of the fan assembly when it is determined that the connection sequence is correct, and detect the received electrical signal through the detection end during the operation; And judge whether the fan assembly is abnormal according to the signal state of the electrical signal.

9. The fan control detection device according to claim 8, wherein Judging whether the fan assembly is abnormal according to the signal state of the electrical signal includes: According to the signal state of the electrical signal, if the signal state of the electrical signal is the same as the second preset state, it is determined that there is an abnormality in the fan assembly.

10. An image forming apparatus, characterized in that, Including the fan control detection device according to any one of claims 1 to 9.

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