Control circuit and air blower

Abstract

The utility model relates to the technical field of power supplies, discloses a control circuit and an air blower, and aims to solve the problems caused by independent existence of an emergency starting power supply and an air blower in the current market. The provided control circuit is applied to the air blower and comprises an emergency battery cell, a switch module, a driving module and a control module. A first end of the switch module is connected with the emergency battery cell, a second end is connected with an emergency interface of the air blower, and the emergency interface is used for emergency starting; the driving module is connected with the emergency battery cell and an air blowing motor of the air blower; the control module is connected with the control end of the switch module and is used for controlling the switch-on or switch-off of the switch module; the control module is connected with the driving module and used for driving the air blowing motor to blow air through the driving module. The provided control circuit aims to combine an emergency starting power supply and an air blower into one, so that a vehicle owner can use the air blower more conveniently, and meanwhile, the economic cost and the occupied space in the vehicle are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply technical field especially relates to a control circuit and air blower. BACKGROUND

[0002] In daily driving, the car owner often needs to deal with various emergency situations, for example, the car battery is out of power and cannot be started. Therefore, the emergency starting power supply has become a necessary tool for many car owners. But because the power shortage scene is very rare, the purchased emergency starting power supply is often idle in the car, and even the battery of the emergency starting power supply is damaged. This practice not only increases the economic burden of the car owner, causes waste of resources, and greatly reduces the demand of the car owner to purchase the emergency starting power supply. SUMMARY

[0003] The utility model provides a control circuit and air blower, it aims at solving the current market, emergency starting power supply and air blower two kinds of products generally exist in the form of independence, the car owner needs to purchase emergency starting power supply and air blower respectively, and they are carried and stored separately. This practice not only increases the economic burden of the car owner, but also leads to the problem of inconvenience and waste of space in the car.

[0004] In the first aspect, the utility model provides a control circuit applied to air blower, and the control circuit comprises:

[0005] Emergency cell, the emergency cell is connected with the emergency interface of the air blower, and the emergency interface is used for emergency starting;

[0006] Drive module, the first end of the drive module is connected with the emergency cell, and the second end of the drive module is connected with the blowing motor of the air blower;

[0007] First control module, the first control module is connected with the controlled end of the drive module, and is used for driving the blowing motor to blow through the drive module.

[0008] In some embodiments, the control circuit further comprises: a protection module for connecting the emergency cell and the emergency interface;A second control module is connected with the protection module, and the second control module is used to control the conduction or disconnection of the protection module to control the emergency cell to output power supply to external equipment through the emergency interface.

[0009] For example, the control circuit further comprises: a first trigger module for receiving the trigger operation of the user to generate a first trigger signal;The first trigger module is connected with the second control module, and the second control module is used to control the conduction or disconnection of the protection module according to the first trigger signal.

[0010] In some embodiments, the control circuit further comprises a battery detection module connected with the emergency cell and the first control module respectively, the battery detection module generates a first detection signal of the emergency cell; if the first detection signal indicates that the emergency cell is abnormal, the first control module controls the driving module to stop the blowing motor from blowing.

[0011] For example, the first detection signal comprises one or more of a battery voltage detection signal, a battery current detection signal and a battery temperature detection signal; the battery detection module further comprises a battery voltage detection unit connected with the emergency cell and the control module respectively, which generates the battery voltage detection signal; if the battery voltage detection signal indicates that the emergency cell is under-voltage, the first control module controls the switch module to be disconnected and stops the blowing motor from blowing through the driving module; and / or, a battery current detection unit connected with the emergency cell and the control module respectively, which generates the battery current detection signal; if the battery current detection signal indicates that the emergency cell is over-current, the first control module controls the switch module to be disconnected and stops the blowing motor from blowing through the driving module; and / or, a battery temperature detection unit connected with the emergency cell and the control module respectively, which generates the battery temperature detection signal; if the battery temperature detection signal indicates that the emergency cell is over-temperature, the first control module controls the switch module to be disconnected and stops the blowing motor from blowing through the driving module.

[0012] In some embodiments, the control circuit further comprises a second trigger module connected with the first control module, the second trigger module generates a second trigger signal when triggered, and the first control module drives or stops the blowing motor according to the second trigger signal.

[0013] In some embodiments, the supply voltage of the emergency cell is input to the driving module, the first control module converts the supply voltage into a driving voltage through the driving module, and the driving voltage drives the blowing motor to blow.

[0014] For example, the blowing motor comprises N blowing gears, N is a positive integer greater than or equal to 2; each blowing gear corresponds to a different driving voltage.

[0015] In some embodiments, the control circuit further comprises: a motor detection module connected with the blowing motor and the first control module respectively, and generating a second detection signal of the blowing motor; if the second detection signal indicates that the blowing motor is abnormal, the first control module stops the blowing motor from blowing through the driving module.

[0016] For example, the second detection signal at least includes one or more of a motor current detection signal and a motor temperature detection signal; the motor detection module further comprises: a motor current detection unit connected with the blowing motor and the first control module respectively, and generating the motor current detection signal; if the motor current detection signal indicates that the blowing motor is overcurrent, the first control module stops the blowing motor from blowing through the driving module; and / or, a motor temperature detection unit connected with the blowing motor and the first control module respectively, and generating the motor temperature detection signal; if the motor temperature detection signal indicates that the blowing motor is overheated, the first control module stops the blowing motor from blowing through the driving module.

[0017] In some embodiments, the control circuit further comprises: a pre-warning module connected with the first control module; if the emergency cell is abnormal and / or the blowing motor is abnormal, the first control module controls the pre-warning module to pre-warn.

[0018] In some embodiments, the driving module comprises: a first switching unit, a first end of the first switching unit being connected with the emergency cell, a second end of the first switching unit being connected with a preset ground end, and a controlled end of the first switching unit being connected with the control module; an interface unit, an output end of the interface unit being used for accessing the blowing motor; an input end of the interface unit being connected between the emergency cell and the first end of the first switching unit, or the input end of the interface unit being connected between the second end of the first switching unit and the ground end; wherein the first control module controls the first switching unit to be conductive through the controlled end of the first switching unit, so as to power on the interface unit to drive the blowing motor to blow.

[0019] In the second aspect, the utility model provides a gas blowing machine, the gas blowing machine includes emergency interface, blowing motor and the control circuit of any embodiment provided by the utility model, the control circuit is connected with the emergency interface, is used for controlling the emergency interface to carry out emergency start; the control circuit is connected with the blowing motor, is used for driving the blowing motor blows.

[0020] In some embodiments, the air blower further comprises: a housing for accommodating at least part of the blowing motor and the control circuit, the housing is further formed with an air outlet and an air inlet, when the blowing motor is working, air is blown from the air inlet to the air outlet through the blowing motor; a flow guide member for connecting the air outlet, the flow guide member is used to adjust the air outlet effect of the air flow of the air outlet.

[0021] For example, the air inlet side of the flow guide member is connected to the air outlet, the air outlet side of the flow guide member is used for air outlet, the area of the air inlet side of the flow guide member is smaller than the area of the air outlet side of the flow guide member, so that the air flow of the air outlet is concentrated.

[0022] In some embodiments, the blowing motor comprises a motor and a fan blade, the motor and the fan blade are enclosed in the same housing; the blowing of the air blower is used for cleaning, including blowing dust, sundries or snow; the emergency interface of the air blower is used for external connection of a vehicle, and provides electric energy for starting the vehicle.

[0023] The utility model provides a kind of control circuit and air blower. It aims at solving the problems caused by the independent existence of emergency starting power supply and air blower in current market, specifically including increasing the economic burden of car owner, inconvenience to carry and waste of in-vehicle space etc. The control circuit integrates the functions of emergency starting power supply and air blower, so that car owner only needs to purchase one device to realize two functions. The control circuit comprises the following modules: emergency cell is used to provide the electric energy required by air blower and emergency starting. Emergency interface is used to start vehicle in emergency when vehicle battery is insufficient. Driving module is connected with emergency cell and blowing motor of air blower, and is used to drive blowing motor to work. First control module is connected with driving module, and is used to drive blowing motor to blow by driving module.

[0024] In conclusion, the control circuit provided by the utility model aims at integrating emergency starting power supply and air blower, car owner only needs to purchase one device integrating emergency starting power supply and air blower, without needing to purchase two products respectively, effectively solve the problems in current market, improve the comprehensive performance and user experience of air blower. This not only simplifies the purchase process, but also reduces overall economic cost. This innovative design not only reduces the economic burden of car owner, but also improves the carrying convenience and space utilization efficiency of equipment.

[0025] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the premise of not paying creative labor.

[0027] Figure 1 is a structural schematic block diagram of the first control circuit provided by the embodiments of the present application;

[0028] Figure 2 is a structural schematic block diagram of the second control circuit provided by the embodiments of the present application;

[0029] Figure 3 is a structural schematic block diagram of the third control circuit provided by the embodiments of the present application;

[0030] Figure 4 is a structural schematic block diagram of the fourth control circuit provided by the embodiments of the present application;

[0031] Figure 5 is a structural schematic block diagram of the fifth control circuit provided by the embodiments of the present application;

[0032] Figure 6 is a structural schematic block diagram of the sixth control circuit provided by the embodiments of the present application;

[0033] Figure 7 is a structural schematic block diagram of the first driving module provided by the embodiments of the present application;

[0034] Figure 8 is a structural schematic block diagram of the second driving module provided by the embodiments of the present application;

[0035] Figure 9 is a circuit schematic block diagram of the driving module provided by the embodiments of the present application;

[0036] Figure 10 is a structural schematic block diagram of the seventh control circuit provided by the embodiments of the present application;

[0037] Figure 11 is a schematic block diagram of a blowing machine provided by the present application;

[0038] Figure 12 is a structural schematic block diagram of the first blowing machine provided by the embodiments of the present application;

[0039] Figure 13 is a structural schematic block diagram of the second blowing machine provided by the embodiments of the present application.

[0040] Mark explanation:

[0041] 100, air blower;

[0042] 10, control circuit;

[0043] 11, emergency cell; 12, drive module; 121, first switch unit; 122, interface unit; 13, first control module; 14, protection module; 15, second control module; 16, battery detection module; 161, battery voltage detection unit; 162, battery current detection unit; 163, battery temperature detection unit; 17, first trigger module; 18, second trigger module; 19, motor detection module; 10a, early warning module;

[0044] 20, emergency interface;

[0045] 30, blowing motor; 31, motor; 32, fan blade;

[0046] 40, ground terminal;

[0047] 50, shell;

[0048] 60, flow guide.

[0049] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the utility model. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0051] The flow chart shown in the drawings is only illustrative, and does not necessarily include all the contents and operations / steps, nor does it necessarily execute in the described order. For example, some operations / steps can also be decomposed, combined or partially merged, so that the actual execution order can be changed according to the actual situation.

[0052] It should be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in the utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0053] It should be understood that, in order to facilitate the clear description of the technical scheme of the embodiments of the utility model, in the embodiments of the utility model, the same items or similar items with basically same function and action are distinguished by using "first", "second" and the like. For example, the first trigger module and the second trigger module are only used to distinguish different trigger modules, and the sequence is not limited. The skilled in the art can understand that "first", "second" and the like do not limit the quantity and execution sequence, and "first", "second" and the like do not necessarily mean different.

[0054] It should also be understood that the term "and / or" used in the utility model specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0055] Some embodiments of the utility model are described in detail below. In the case of no conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0056] In daily driving, the car owner often needs to deal with various unexpected situations, for example, the car battery is out of power and cannot be started. Therefore, the emergency starting power supply has become a necessary tool for many car owners. However, due to the rareness of the power shortage scene, the purchased emergency starting power supply is often idle in the car, and even the battery of the emergency starting power supply is damaged by power shortage. This practice not only increases the economic burden of the car owner, causes resource waste, and greatly reduces the demand of the car owner to purchase the emergency starting power supply.

[0057] To solve the above problems, please refer to Figure 1 The control circuit provided by the embodiments of the utility model is applied to a hair dryer, and the control circuit comprises an emergency cell, a driving module and a first control module.

[0058] The emergency cell 11 is connected with the emergency interface 20 of the hair dryer 100, and the emergency interface 20 is used for emergency starting. The driving module 12 is connected with the emergency cell 11 and the blowing motor 30 of the hair dryer 100. The first control module 13 is connected with the driving module 12, and is used for driving the blowing motor 30 to blow through the driving module 12.

[0059] Specifically, the control circuit 10 provided by the utility model aims to solve the problems caused by the independent existence of the emergency starting power supply and the hair dryer in the current market, specifically including increasing the economic burden of the car owner, inconvenience in carrying and waste of space in the car and the like. The control circuit 10 provided integrates the functions of the emergency starting power supply and the hair dryer, so that the car owner only needs to purchase one device to realize two functions.

[0060] Specifically, the provided control circuit 10 aims to integrate the emergency starting power supply and the air blower, so as to facilitate the owner to use more conveniently, and reduce the economic cost and the occupation of the space in the vehicle.

[0061] In the control circuit 10, the emergency cell 11 is the energy source of the device, which can provide the high current required in the emergency starting and the low current required in the normal operation of the air blower motor 30. The embodiments of the present application do not limit the size of the current and voltage provided by the control circuit 10 to the air blower motor 30 and the emergency interface 20.

[0062] The driving module 12 can drive the air blower motor 30, and can also adjust the rotating speed and power of the motor according to the instruction of the first control module 13. The provided control circuit 10 reduces the energy loss by using the high-efficiency driving module 12. At the same time, the provided driving module 12 supports PWM (pulse width modulation) and other control strategies designed according to actual needs, which can accurately adjust the rotating speed of the motor. For example, the rotating speed of the air blower motor 30 can be adjusted by the first control module 13 sending a PWM signal.

[0063] The first control module 13 is responsible for controlling the on or off of the switching module 14, and adjusting the working state of the air blower motor 30 through the driving module 12. It can be a microcontroller (MCU) to perform complex logical operations and signal processing. At the same time, the first control module 13 can realize the overload protection, short circuit protection, overheat protection, and undervoltage protection of the emergency cell 11 through the control of the switching module 14 and the motor driving module 12, to ensure the safe use of the battery.

[0064] At the same time, the provided control circuit 10 can also include a user interface, such as a selection of an LCD display screen or an LED indicator light, to provide clear mode selection and state display. Further, the user can realize mode switching through buttons or touch screens. The user interface can also monitor parameters such as battery voltage, current, and temperature in real time, to ensure the safe operation of the device.

[0065] In some embodiments, as shown in Figure 2 The control circuit 10 further includes a protection module 14 connected to the emergency cell 11 and the emergency interface 20, and a second control module 15 connected to the protection module 14. The second control module 15 is used to control the on or off of the protection module 14, to control the emergency cell 11 to output power to external devices through the emergency interface 20.

[0066] The protection module 14 is used to ensure that the current of the emergency cell 11 can be input to the emergency interface 20 in the emergency starting. The emergency interface 20 is used to start the vehicle in the case of insufficient vehicle battery power. A relay or a MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) can be selected as a switching element, and its on or off is controlled by the signal of the first control module 13.

[0067] As shown in Figure 3 The control circuit 10 further comprises a first trigger module 17 configured to receive a user's trigger operation and generate a first trigger signal. The first trigger module 17 is connected to the second control module 15, which is configured to control the on or off of the protection module 14 according to the first trigger signal.

[0068] The user can manually control the on or off of the protection module 14 through the first trigger module 17, increasing the autonomy of the air blower 100. In some cases where immediate disconnection of the corresponding connection of the emergency interface 20 or emergency start is required, the user can quickly operate through the button without going through other complex steps. The first trigger module 17 provides an intuitive physical button that the user can easily operate. Through the physical button, the possibility of misoperation can be reduced, and the reliability of the device can be improved.

[0069] At the same time, the user can perform a cycle operation through the first trigger module 17, such as the first trigger signal corresponding to the first trigger module 17 received by the first control module 13 last time being to turn on the protection module 14, and the next time being to turn off the protection module 14, and so on. The introduction of the first trigger module 17 provides the user with the function of manually controlling the on or off of the protection module 14, increasing the autonomy and safety of the device.

[0070] In some embodiments, as shown in Figure 3 The control circuit 10 further comprises a second trigger module 18 connected to the first control module 13. The second trigger module 18 generates a second trigger signal when triggered, and the first control module 13 drives or stops the air blowing motor 30 according to the second trigger signal.

[0071] The user can manually control the start and stop of the air blowing motor 30 through the second trigger module 18, increasing the autonomy of the device. In the case of needing to quickly start and stop the air blowing function, the user can quickly operate through the second trigger module 18 without going through other complex steps. After the user presses the second trigger module 18, the first control module 13 can quickly respond and immediately drive or stop the air blowing motor 30, improving work efficiency. At the same time, functions such as gear adjustment and steering of the air blowing motor 30 can also be realized. The manual control of the start and stop function can save the user's time, especially in the case of needing to quickly stop the air blowing motor 30 in an emergency.

[0072] The introduction of the second trigger module 18 provides the user with the function of manually controlling the start and stop of the blowing motor 30, improving the convenience and efficiency of operation. These two designs not only make the device more user-friendly, but also significantly improve the reliability and safety of the device. Users can quickly respond to abnormal situations of the device through physical buttons, ensuring that the device operates in a safe state.

[0073] It should be noted that the first trigger module 17 and the second trigger module 18 can be buttons, toggle switches, touch screens, and voice receiving modules, and the user's trigger operation includes pressing, touching, voice input, etc. The embodiments of the present application do not limit the types of the first trigger module 17 and the second trigger module 18.

[0074] In combination with the above embodiments, the specific use of the control circuit 10 can be:

[0075] 1. Emergency start: The owner connects the positive and negative poles of the emergency interface 20 of the device to the positive and negative poles of the car battery. By triggering the corresponding button of the protection module 14, the control circuit 10 enters the pre-set emergency start mode, the second control module 15 detects the trigger signal corresponding to the emergency start mode, sends a signal to the protection module 14, and the high current of the emergency cell 11 flows to the car battery through the emergency start interface, to realize the start of the car. After the car starts successfully, the owner can disconnect the emergency interface 20 and disconnect the protection module 14.

[0076] 2. Blowing operation: The owner points the blowing nozzle of the device to the part that needs to be cleaned. By triggering the corresponding button of the protection module 14, the control circuit 10 enters the pre-set blowing mode, the first control module 13 detects the trigger signal corresponding to the blowing mode, sends a signal to the driving module 12, and the emergency cell 11 generates a low current through the driving module 12 to flow to the blowing motor 30 through the driving module 12. The blowing motor 30 starts to work and blows strong wind to clean dust. The owner can adjust the wind speed by pressing the button on the first control module 13 or generating different trigger signals, and the first control module 13 controls the driving module 12 through the PWM signal to adjust the motor speed, realizing multi-grade blowing control. After cleaning the dust, the owner turns off the blowing motor 30, disconnects the nozzle, and selects to disconnect the driving module 12 and the blowing motor 30 through the control circuit 10.

[0077] In summary, the control circuit 10 provides an efficient, convenient, economical and safe solution by integrating the emergency starting power supply and the air blower. Its design not only meets the needs of the vehicle owner in various scenarios, but also ensures the long-term stable use of the applied air blower 100 through various protection mechanisms and intelligent monitoring functions. This integrated air blower 100 is very practical in daily driving and can significantly improve the user experience of the vehicle owner.

[0078] In some embodiments, as shown in Figure 4 The control circuit 10 further includes a battery detection module 16 connected with the emergency cell 11 and the first control module 13, respectively. The battery detection module 16 generates a first detection signal of the emergency cell 11. If the first detection signal indicates that the emergency cell 11 is abnormal, the first control module 13 stops the air blowing motor 30 through the driving module 12.

[0079] The battery detection module 16 can monitor the key parameters of the emergency cell 11 in real time to generate the first detection signal. The type of detected parameters can be set according to actual needs, such as voltage, current and temperature, which are not limited in the embodiments of the present application. The first control module 13 can determine abnormal conditions such as low battery voltage, excessive current and high temperature according to the detected battery parameters. The first detection signal can include the above abnormal conditions. The battery detection module 16 is connected with the first control module 13 to ensure that the detection signal can be transmitted to the first control module 13 in real time.

[0080] The first control module 13 receives and processes the first detection signal generated by the battery detection module 16. If the first detection signal indicates that the emergency cell 11 is abnormal, the first control module 13 will stop the operation of the air blowing motor 30 through the driving module 12, so as to ensure that the air blowing motor 30 does not continue to work when the battery is abnormal, thereby avoiding further damage.

[0081] For example, as shown in Figure 4 The battery detection module 16 is also connected with the second control module 15. If the first detection signal indicates that the emergency cell 11 is abnormal, the second control module 15 controls the protection module 14 to be disconnected.

[0082] At the same time, the second control module 15 can be externally connected to the battery clamp, and the starting function of the protection module 14 is controlled by the second control module 15 in the battery clamp.

[0083] If the first detection signal indicates that the emergency cell 11 is abnormal, the second control module 15 will immediately control the protection module 14 to be disconnected, thereby cutting off the connection between the emergency cell 11 and the emergency starting interface, preventing the current from continuing to flow.

[0084] In summary, by adding the battery detection module 16, the safety and reliability of the control circuit 10 are greatly improved. It can monitor various state parameters of the emergency battery 11 in real time, and take protective measures quickly when an abnormality is detected, thereby avoiding equipment damage and potential safety risks. This design not only prolongs the service life of the equipment, but also improves the user experience, especially in emergency situations to better protect the safety of the vehicle owner and the vehicle.

[0085] For example, the first detection signal includes one or more of a battery voltage detection signal, a battery current detection signal, and a battery temperature detection signal. Figure 5 As shown, the battery detection module 16 further includes: a battery voltage detection unit 161, the battery voltage detection unit 161 is connected with the emergency battery 11 and the first control module 13 respectively, generates a battery voltage detection signal, if the battery voltage detection signal indicates that the emergency battery 11 is overvoltage, the first control module 13 stops the blowing motor 30 blowing through the driving module 12; and / or, a battery current detection unit 162, the battery current detection unit 162 is connected with the emergency battery 11 and the first control module 13 respectively, generates a battery current detection signal, if the battery current detection signal indicates that the emergency battery 11 is overcurrent, the first control module 13 stops the blowing motor 30 blowing through the driving module 12; and / or, a battery temperature detection unit 163, the battery temperature detection unit 163 is connected with the emergency battery 11 and the first control module 13 respectively, generates a battery temperature detection signal, if the battery temperature detection signal indicates that the emergency battery 11 is overheating, the first control module 13 stops the blowing motor 30 blowing through the driving module 12.

[0086] The battery voltage detection unit 161 is used to monitor the voltage of the emergency battery 11 in real time. A battery voltage detection signal is generated to indicate whether the voltage of the emergency battery 11 is within a safe range. It can include a voltage sensor for detecting the voltage of the emergency battery 11.

[0087] When the battery voltage detection unit 161 detects that the voltage of the emergency battery 11 exceeds the set upper limit of safety (for example, 14.5V). The first control module 13 receives the overvoltage signal sent by the battery voltage detection unit 161, determines that the emergency battery 11 is overvoltage, immediately controls the driving module 12 to be disconnected (at the same time as Figure 5 As shown, the battery voltage detection unit 161 can also control the protection module 14 to be disconnected when it is connected with the second control module 15), to cut off the connection between the emergency battery 11 and the emergency starting interface and the blowing motor 30. The first control module 13 can also prompt the vehicle owner that the battery voltage is too high and the emergency battery 11 needs to be checked.

[0088] At the same time, the battery voltage detection unit 161 can also detect that the voltage of the emergency battery 11 is lower than the set safety lower limit (for example, 10.5V). The first control module 13 receives the undervoltage signal sent by the battery voltage detection unit 161, and immediately cuts off the connection between the emergency battery 11 and the blower motor 30. At the same time, the first control module 13 can issue a warning to prompt the vehicle owner that the voltage of the emergency battery 11 is too low and needs to be charged or replaced.

[0089] The battery current detection unit 162 is used to monitor the current of the emergency battery 11 in real time. A battery current detection signal is generated to indicate whether the current of the emergency battery 11 is within a safe range. It can include a current sensor for detecting the current of the emergency battery 11. When the battery current detection unit 162 detects that the current of the emergency battery 11 exceeds the set safety upper limit (for example, 100A), the first control module 13 will receive the overcurrent signal sent by the battery current detection unit 162, and immediately control the drive module 12 to disconnect, to cut off the connection between the emergency battery 11 and the blower motor 30 (at the same time, as shown in Figure 5 the battery current detection unit 162 is connected with the second control module 15, it can also control the protection module 14 to disconnect at the same time). At the same time, the first control module 13 can prompt the vehicle owner to check whether the connection between the emergency battery 11 or the emergency interface 20 and the blower motor 30 is normal.

[0090] The battery temperature detection unit 163 is used to monitor the temperature of the emergency battery 11 in real time. A battery temperature detection signal is generated to indicate whether the temperature of the emergency battery 11 is within a safe range. It can include a temperature sensor for detecting the temperature of the emergency battery 11. When the battery temperature detection unit 163 detects that the temperature of the emergency battery 11 exceeds the set safety upper limit (for example, 60°C), the first control module 13 receives the overheat signal sent by the battery temperature detection unit 163, and immediately controls the drive module 12 to disconnect, to cut off the connection between the emergency battery 11 and the blower motor 30 (at the same time, as shown in Figure 5 the battery temperature detection unit 163 is connected with the second control module 15, it can also control the protection module 14 to disconnect at the same time). At the same time, the first control module 13 will also prompt the vehicle owner that the battery temperature is too high, and the device needs to be cooled before use.

[0091] In summary, through the functions and effects of the battery voltage detection unit 161, the battery current detection unit 162 and the battery temperature detection unit 163, the safety, reliability of the control circuit 10 and the service life of the air blower 100 can be improved through these detection units. This design not only provides a more convenient use experience for the vehicle owner, but also greatly reduces the risk of damage to the device due to abnormal battery, thereby saving maintenance costs and prolonging the service life of the device.

[0092] It should be noted that in some embodiments, the battery voltage detection unit 161 is connected to the positive electrode of the emergency cell 11; and / or, the battery current detection unit 162 is connected to the negative electrode of the emergency cell 11.

[0093] By connecting the battery voltage detection unit 161 to the positive electrode of the emergency cell 11, the voltage of the battery can be more accurately monitored, avoiding the influence of voltage drop caused by line resistance on the detection result. By connecting the battery current detection unit 162 to the negative electrode of the emergency cell 11, the discharge current of the battery can be more accurately measured, because the negative electrode is usually closer to the inside of the battery, reducing the influence of line resistance.

[0094] It should be noted that in some embodiments, if the battery voltage detection signal indicates that the battery is overvoltage, the first control module 13 controls the emergency cell 11 to stop charging

[0095] When the battery voltage exceeds the set safety upper limit (for example, 14.5V), the first control module 13 will immediately stop charging to prevent overcharging of the battery, avoiding shortening or damaging the battery life. Overcharging can cause the battery temperature to rise, and even cause a fire or explosion. Stopping charging can significantly improve the safety of the device. The first control module 13 can automatically determine whether the battery is fully charged and stop charging without human intervention, making it convenient for users to use. By preventing overcharging, the service life of the battery is extended, thereby extending the use time of the entire device

[0096] It should be noted that in some embodiments, if the battery current detection signal indicates that the battery is overcurrent, the first control module 13 controls the emergency cell 11 to stop charging.

[0097] When the battery current exceeds the set safety upper limit (for example, 100A), the first control module 13 will immediately stop charging to prevent overcurrent of the battery, avoiding damage to the internal structure of the battery or shortening the service life. Overcurrent can cause the internal temperature of the battery to rise sharply, and even cause a fire or explosion. Stopping charging can significantly reduce this risk. Overcurrent may be caused by a fault in the charging device or a fault in the battery. The first control module 13 stops charging to prompt the user to check the charging device or the battery, and timely discover and solve the problem. Stopping charging can prevent current from continuing to pass through the fault point, avoiding damage to other parts of the device.

[0098] It should be noted that in some embodiments, the emergency cell 11 is connected to a charging module, the charging module is used to charge the emergency cell 11, and the control circuit 10 controls the charging module to disconnect the connection with the emergency cell 11 to control the emergency cell 11 to stop charging by the first control module 13.

[0099] The first control module 13 can comprehensively judge the battery state through the battery voltage detection signal and the battery current detection signal, more intelligently control the disconnection and connection of the charging module, and ensure that the battery always works within a safe range. When overvoltage or overcurrent of the battery is detected, the first control module 13 will automatically disconnect the connection between the charging module and the emergency cell 11, preventing overcharging or overcurrent of the battery, and improving the reliability and safety of the device.

[0100] In some embodiments, the power supply voltage of the emergency cell 11 is input to the driving module 12, and the first control module converts the power supply voltage into a driving voltage through the driving module 12, and the driving voltage drives the blower motor 30 to blow.

[0101] Through the driving module 12, different voltages provided by the emergency cell 11 can be converted into driving voltages suitable for the operation of the blower motor 30, ensuring that the device can work normally under different battery voltages. Users can use emergency cells 11 with different voltages without worrying about voltage mismatching, improving the flexibility and application range of the device. At the same time, the driving module 12 can ensure the stability of the power supply voltage, avoiding the instability of the blower motor 30 caused by the fluctuation of the battery voltage. Through the voltage conversion of the driving module 12, it can prevent the battery voltage from being too high and directly acting on the blower motor 30, causing damage to the motor. Similarly, through the voltage conversion of the driving module 12, it can prevent the battery voltage from being too low, causing the motor to fail to start or work normally. By introducing the driving module 12, the stable conversion of the power supply voltage of the emergency cell 11 to the driving voltage of the blower motor 30 is realized, improving the compatibility and energy efficiency of the device, and protecting the motor.

[0102] For example, the blower motor 30 includes N blowing gears, where N is a positive integer greater than or equal to 2; each blowing gear corresponds to a different driving voltage.

[0103] Users can select different blowing gears according to actual needs to meet the needs in different scenarios. For example, low gears are suitable for light dust cleaning, and high gears are suitable for heavy dust or rapid cooling. Different blowing gears correspond to different driving voltages, which can achieve more precise wind power control and improve the user's operation experience. According to the selected gear, the driving module 12 outputs the corresponding driving voltage, avoiding energy waste caused by excessive power supply. Through on-demand power supply, the battery's discharge current and discharge time are effectively controlled, reducing the burden on the battery and prolonging the service life of the battery. Through multi-gear design, users can select different wind power gears according to actual needs, achieving more precise control and more energy-efficient operation. Not only improves the performance and safety of the device, but also improves the user's operation experience, making the device more intelligent and user-friendly.

[0104] In some embodiments, as Figure 6As shown, the control circuit 10 further comprises a motor detection module 19 connected with the blowing motor 30 and the first control module 13 respectively, generating a second detection signal of the blowing motor 30. If the second detection signal indicates that the blowing motor 30 is abnormal, the first control module 13 stops the blowing motor 30 through the driving module 12.

[0105] Through the motor detection module 19, the working state of the blowing motor 30 can be monitored in real time, and abnormal conditions can be found in time. Real-time monitoring can ensure that the motor always operates in a normal state, improving the reliability and stability of the equipment. If the blowing motor 30 is abnormal, the first control module 13 will immediately stop the operation of the motor to prevent the fault from further expanding. By protecting the motor in time, the damage to the motor can be reduced, and the service life of the entire equipment can be prolonged.

[0106] For example, the second detection signal at least includes one or more of a motor current detection signal and a motor temperature detection signal; the motor detection module 19 further comprises a motor current detection unit connected with the blowing motor 30 and the first control module 13 respectively, generating a motor current detection signal. If the motor current detection signal indicates that the blowing motor 30 is overcurrent, the first control module 13 stops the blowing motor 30 through the driving module 12; and / or a motor temperature detection unit connected with the blowing motor 30 and the first control module 13 respectively, generating a motor temperature detection signal. If the motor temperature detection signal indicates that the blowing motor 30 is overheated, the first control module 13 stops the blowing motor 30 through the driving module 12.

[0107] Through the motor current detection unit, the first control module 13 can monitor the current of the blowing motor 30 in real time. If it is detected that the motor is overcurrent (for example, the current exceeds the safety threshold 100A), the first control module 13 will immediately stop the operation of the motor to prevent the motor from being damaged due to excessive current. Overcurrent can cause the internal temperature of the motor to rise sharply, and even cause fire or explosion. Stopping the motor in time can significantly reduce these risks.

[0108] Through the motor temperature detection unit, the first control module 13 can monitor the temperature of the blowing motor 30 in real time. If it is detected that the motor is overheated (for example, the temperature exceeds the safety threshold 80°C), the first control module 13 will immediately stop the operation of the motor to prevent the motor from being damaged due to high temperature. Overheating will cause the performance of the motor material to decrease, reducing the service life of the motor. By stopping in time, the motor can be protected, and its service life can be prolonged.

[0109] The motor detection module 19 can detect the current and temperature of the motor at the same time, providing multiple protection mechanisms to ensure that the motor operates within a safe range. The first control module 13 can comprehensively judge the state of the motor according to the current and temperature of the motor, and provide more accurate protection measures.

[0110] Through the motor current detection unit 181 and the motor temperature detection unit 182, double protection of motor overcurrent and overheating is realized. This comprehensive protection mechanism not only can discover and handle the abnormal situation of the motor in time, but also improves the operation experience of the user and the service life of the equipment through user prompts and operation guidance functions. These designs make the equipment more intelligent and user-friendly, ensuring safe and reliable operation under various use conditions.

[0111] In some embodiments, as Figures 7 to 9 shown. The driving module 12 includes: a first switch unit 121, a first end of the first switch unit 121 connected with the emergency battery 11, a second end of the first switch unit 121 connected with a preset ground end 40, and a controlled end of the first switch unit 121 connected with the first control module 13; an interface unit 122, an input end of the interface unit 122 connected between the emergency battery 11 and the first end of the first switch unit 121 (as Figure 7 shown), or, the input end of the interface unit 122 connected between the second end of the first switch unit 121 and the ground end 40 (as Figure 8 shown), and an output end of the interface unit 122 connected with the blowing motor 30; wherein the first control module 13 controls the first switch unit 121 to conduct through the controlled end of the first switch unit 121, and drives the blowing motor 30 to blow through the interface unit 122.

[0112] The first control module 13 precisely controls the power supply state of the emergency battery 11 through the controlled end of the first switch unit 121, ensuring that the blowing motor 30 only receives driving voltage when needed. By precisely controlling the switch unit, the damage of the motor or over-discharge of the battery caused by misoperation can be reduced. The first switch unit 121 can be quickly disconnected when detecting overloading of the emergency battery 11 or the blowing motor 30, preventing safety problems caused by excessive current. If a short circuit of the emergency battery 11 or the blowing motor 30 is detected, the first switch unit 121 can be immediately disconnected to protect the circuit from damage.

[0113] At the same time, the first control module 13 can control the conduction or disconnection of the first switch unit 121 according to actual needs, avoiding the blowing motor 30 from consuming power when it is not needed. By precisely controlling the switch, the invalid discharge of the battery can be reduced, prolonging the service life of the battery. And through the cooperation of the first switch unit 121 and the interface unit 122, the stability of the driving voltage can be ensured, avoiding unstable operation of the motor caused by battery voltage fluctuations. The interface unit 122 can control and adjust the current provided by the battery to a certain extent, ensuring that the motor works within a safe current range.

[0114] For example, as Figure 9As shown, the interface unit 122 is interface H1, and the first switch unit 121 is MOS tube Q1. The input end of interface H1 includes input terminal 1 and input terminal 2 and an output terminal, which is connected with the blowing motor 30. When the input terminal 1 of interface H1 is connected between the emergency battery 11 and the first end of the first switch unit 121, the input terminal 1 of the interface unit 122 can be connected with the parallel-connected resistance R1 and resistance R2. The input terminal 2 of interface H1 is connected with the D pole of MOS tube Q1, and the S pole of MOS tube Q1 is connected with the ground terminal 40. The S pole of MOS tube Q1 is also connected with the G pole of MOS tube Q1 through resistance R3, and the G pole of MOS tube Q1 is connected with the first control module 13 through resistance R4. The first control module 13 controls the conduction of MOS tube Q1 by sending a conduction signal to the G of MOS tube Q1, and converts the voltage of the emergency battery 11 by means of PWM modulation or the like. When MOS tube Q1 is in conduction, the converted battery voltage is input to the blowing motor 30.

[0115] Among them, resistance R1 and resistance R2 are voltage dividing resistors, which can ensure that the input terminal 1 of interface H1 will not be damaged by too high voltage when connecting the emergency battery 11. At the same time, the parallel-connected resistors can absorb part of the transient voltage peak value, and protect interface H1 from being damaged by too high voltage impact.

[0116] Resistance R3 is a pull-down resistor, which is used to ensure that the G pole of MOS tube Q1 keeps low level without control signal, and MOS tube Q1 is in off state. This can prevent MOS tube from being mis-conducted due to unstable or failure of the signal of the first control module 13. When the first control module 13 stops sending the conduction signal, resistance R3 provides a discharge path to quickly discharge the G pole of MOS tube Q1, so as to ensure that the MOS tube can be quickly turned off, and improve the response speed.

[0117] Resistance R4 is a current-limiting resistor, which limits the current from the first control module 13 to the G pole of MOS tube Q1, so as to prevent excessive current from damaging the output end of the first control module 13 or the G pole of MOS tube. Resistance R4 can play a role in signal matching, so as to ensure that the signal output by the first control module 13 matches the impedance of the input end of the G pole of MOS tube Q1, and improve the stability and reliability of signal transmission.

[0118] The resistance values of the above-mentioned resistors R1, R2, R3 and R4 are set according to actual needs, and the embodiments of the present application do not limit this.

[0119] In some embodiments, as Figure 10As shown, the control circuit 10 further comprises a pre-warning module 10a connected with the first control module 13, which is controlled by the first control module 13 to give a pre-warning if the emergency battery 11 and / or the blowing motor 30 is abnormal.

[0120] Through the pre-warning module 10a, the user can be promptly alerted when the emergency battery 11 or the blowing motor 30 is abnormal, helping the user to take measures in advance to prevent the fault from expanding. Timely pre-warning can reduce potential safety risks caused by faults, such as battery overheating, short circuit, etc.

[0121] The pre-warning module 10a can include but is not limited to: the pre-warning module 10a can give a sound alarm to quickly attract the user's attention. The pre-warning module 10a can display abnormal information through the corresponding LED indicator light, providing visual prompts. In some cases, the pre-warning module 10a can also remind the user through vibration, especially in noisy environments. The pre-warning module 10a can provide detailed fault information through cooperation with the first control module 13, helping the user to quickly locate the problem. The user can be quickly prompted and take action when the device is abnormal, reducing downtime caused by faults.

[0122] By introducing the pre-warning module 10a, timely pre-warning of abnormal conditions of the emergency battery 11 and the blowing motor 30 is realized, improving the safety and reliability of the device. The user can quickly understand the abnormal state of the device through one or more ways (sound, vision, vibration, etc.) and take corresponding measures to reduce the expansion of faults and potential safety risks.

[0123] In combination with Figures 1 to 10 The working principle of the control circuit provided is illustrated with one specific embodiment:

[0124] When the first trigger module 17 is pressed, the second control module 15 detects a low level, and the controlled end of the protection module 14 is set to a high level, and the emergency battery 11 supplies power to the automobile through the emergency interface 20. At this time, the user presses the first trigger module 17 again, and the second control module 15 sets the controlled end of the protection module 14 to a low level, and the emergency battery 11 stops supplying power to the outside through the emergency interface 20.

[0125] When the second trigger module 18 is pressed, the first control module 13 detects a low level, and the emergency battery 11 supplies power to the blowing motor 30 through the driving module 12. At this time, the second trigger module 18 is pressed again, and the first control module 13 sets the corresponding signal of the driving module 12 to the next gear wind signal (the wind signal can be a high level signal), and the product changes the blowing motor speed. By analogy, multiple gear wind control can be set. At the same time, if the wind signal has 5 gears, when the second trigger module 18 is pressed for the sixth time, the first control module 13 can set the corresponding signal of the driving module 12 to a low level signal, and the emergency battery 11 stops supplying power to the blowing motor 30 through the driving module 12.

[0126] The first control module 13 obtains battery temperature information through the battery temperature detection unit 163, and when the battery temperature exceeds the set value, the first control module 13 will close the blowing and starting functions, set the corresponding signals of the protection module 14 and the driving module 12 to low level, and the corresponding LED light of the warning module 10a flashes for two seconds.

[0127] The first control module 13 obtains battery voltage information through the battery voltage detection unit 161, and when the battery voltage exceeds or is lower than the set value, the first control module 13 will perform the same operation to set the corresponding signals of the protection module 14 and the driving module 12 to low level. When the voltage is too high, the first control module 13 closes the charging by setting the charging signal of the emergency battery 11 and the external charging device to low level.

[0128] The first control module 13 obtains battery current information through the battery current detection unit 162, and when the battery discharge current exceeds the set value, the first control module 13 will perform the same operation to set the corresponding signals of the protection module 14 and the driving module 12 to low level. When the battery charging current exceeds the set value, the first control module 13 closes the charging by setting the charging signal of the emergency battery 11 and the external charging device to low level.

[0129] The first control module 13 obtains motor temperature information through the motor temperature detection unit, and when the motor temperature exceeds the set value, the first control module 13 will close the blowing function, set the corresponding signal of the driving module 12 to low level, and the LED flashes for two seconds.

[0130] The first control module 13 obtains motor current information through the motor current detection unit, and when the motor current exceeds the set value, the first control module 13 will close the blowing function, set the corresponding signal of the driving module 12 to low level, and the LED flashes for two seconds.

[0131] Please refer to Figure 11The utility model provides a kind of air blowing machine 100, air blowing machine 100 includes emergency interface 20, blowing motor 30 and the control circuit 10 provided in any embodiment of the utility model, the control circuit 10 is connected with the emergency interface 20, for controlling the emergency interface 20 carries out emergency start;The control circuit 10 is connected with the blowing motor 30, for driving the blowing motor 30 blows.

[0132] Control circuit 10 can include emergency cell 11, protection module 14, drive module 12 and first control module 13.The first end of protection module 14 is connected with emergency cell 11, the second end is connected with the emergency interface 20 of air blowing machine 100, and the emergency interface 20 is used for emergency start.Drive module 12 is connected with emergency cell 11 and the blowing motor 30 of air blowing machine 100.The control end of first control module 13 is connected with protection module 14, for controlling the conduction or disconnection of protection module 14.First control module 13 is connected with drive module 12, for driving blowing motor 30 to blow by drive module 12.

[0133] Meanwhile, the emergency interface 20 can realize the operation such as sparking and power transmission to external equipment, and the air blowing machine 100 can also be a hair dryer, a dust blowing fan or the like, and the embodiments of the present application do not limit this.

[0134] In some embodiments, as shown in Figure 12 and 13 The air blowing machine 100 further includes: a housing 50 for accommodating at least part of the structure of the blowing motor and the control circuit, the housing 50 is further formed with an air outlet and an air inlet, when the blowing motor works, air is blown out from the air inlet to the air outlet through the blowing motor; and a flow guide member 60 connected to the air outlet, the flow guide member 60 is used for adjusting the air outlet effect of the air flow of the air outlet.

[0135] For example, the air inlet side of the flow guide member 60 is connected to the air outlet, the air outlet side of the flow guide member 60 is used for air outlet, and the area of the air inlet side of the flow guide member 60 is smaller than the area of the air outlet side of the flow guide member 60, so as to concentrate the air flow of the air outlet.

[0136] In some embodiments, as shown in Figure 13 The blowing motor 30 includes a motor 31 and a fan blade 32, and the motor 31 and the fan blade 32 are enclosed in the same housing 50; the blowing of the air blowing machine 100 is used for cleaning, including dust blowing, debris or snow; the emergency interface of the air blowing machine 100 is used for external vehicle, and provides electric energy for vehicle start.

[0137] The air blower 100 solves the problems of heavy economic burden, inconvenience of carrying and waste of space in the vehicle by integrating the emergency starting power supply and the dust blowing function, and provides a diversified, simple-to-operate and safe and reliable solution.

[0138] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected. It can be mechanical connection, or electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements or the interaction between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0139] The above disclosure provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described in the above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0140] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0141] The above embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art on the basis of the present application are within the scope of protection of the present application.

Claims

1. A control circuit, characterized in that, The control circuit, applied to an air blower, includes: An emergency battery cell is provided, which is connected to the emergency interface of the air blower. The emergency interface is used for emergency start-up. A drive module, the first end of which is connected to the emergency battery cell, and the second end of which is connected to the blower motor of the air blower; A first control module is connected to the controlled end of the drive module and is used to drive the blower motor to blow air through the drive module.

2. The control circuit according to claim 1, characterized in that, The control circuit also includes: A protection module is used to connect the emergency battery cell and the emergency interface; The second control module is connected to the protection module and is used to control the protection module to turn on or off, so as to control the emergency battery cell to output power to external devices through the emergency interface.

3. The control circuit according to claim 2, characterized in that, The control circuit also includes: The first trigger module is used to receive a user's trigger operation and generate a first trigger signal; the first trigger module is connected to the second control module. The second control module is used to control the protection module to be turned on or off according to the first trigger signal.

4. The control circuit according to claim 1, characterized in that, The control circuit also includes: A battery detection module is connected to both the emergency battery cell and the first control module, and the battery detection module generates a first detection signal for the emergency battery cell. If the first detection signal indicates that the emergency battery cell is abnormal, the first control module controls the drive module to stop the blower motor from blowing air.

5. The control circuit according to claim 4, characterized in that, The first detection signal includes at least one or more of the following: battery voltage detection signal, battery current detection signal, and battery temperature detection signal; the battery detection module further includes: A battery voltage detection unit, connected to both the emergency battery cell and the control module, generates a battery voltage detection signal. If the battery voltage detection signal indicates that the emergency battery cell is undervoltage, the first control module controls the switch module to disconnect and stops the blower motor from blowing air via the drive module; and / or... A battery current detection unit, connected to both the emergency battery cell and the control module, generates a battery current detection signal. If the battery current detection signal indicates that the emergency battery cell is experiencing overcurrent, the first control module controls the switch module to disconnect and stops the blower motor from blowing air via the drive module; and / or... A battery temperature detection unit is connected to both the emergency battery cell and the control module to generate a battery temperature detection signal. If the battery temperature detection signal indicates that the emergency battery cell is overheating, the first control module controls the switch module to disconnect and stops the blower motor from blowing air through the drive module.

6. The control circuit according to claim 1, characterized in that, The control circuit also includes: The second trigger module is connected to the first control module. When the second trigger module is triggered, it generates a second trigger signal. The first control module is used to drive or stop the blower motor from blowing air according to the second trigger signal.

7. The control circuit according to claim 1, characterized in that, The emergency battery cell's power supply voltage is input to the drive module, and the first control module converts the power supply voltage into a drive voltage through the drive module, which drives the blower motor to blow air.

8. The control circuit according to claim 7, characterized in that, The blower motor includes N blowing speed settings, where N is a positive integer greater than or equal to 2; each blowing speed setting corresponds to a different driving voltage.

9. The control circuit according to claim 1, characterized in that, The control circuit also includes: The motor detection module is connected to both the blower motor and the first control module. It generates a second detection signal for the blower motor. If the second detection signal indicates that the blower motor is abnormal, the first control module stops the blower motor from blowing air through the drive module.

10. The control circuit according to claim 9, characterized in that, The second detection signal includes at least one or more of the motor current detection signal and the motor temperature detection signal; the motor detection module further includes: A motor current detection unit, connected to both the blower motor and the first control module, generates a motor current detection signal. If the motor current detection signal indicates that the blower motor is experiencing overcurrent, the first control module stops the blower motor from blowing air via the drive module; and / or A motor temperature detection unit is connected to both the blower motor and the first control module to generate a motor temperature detection signal. If the motor temperature detection signal indicates that the blower motor is overheating, the first control module stops the blower motor from blowing air through the drive module.

11. The control circuit according to claim 1, characterized in that, The control circuit also includes: The early warning module is connected to the first control module. If the emergency battery cell is abnormal and / or the blower motor is abnormal, the first control module controls the early warning module to issue an early warning.

12. The control circuit according to claim 1, characterized in that, The driving module includes: The first switching unit has a first end connected to the emergency battery cell, a second end connected to a preset grounding terminal, and a controlled end connected to the control module. An interface unit, the output of which is used to connect to the blower motor; the input of the interface unit is connected between the emergency battery cell and the first terminal of the first switch unit, or the input of the interface unit is connected between the second terminal of the first switch unit and the ground terminal. The first control module controls the first switch unit to conduct through the controlled terminal of the first switch unit, thereby energizing the interface unit and driving the blower motor to blow air.

13. An air blowing machine, characterized in that, The air blower includes an emergency interface, a blower motor, and a control circuit according to any one of claims 1 to 12. The control circuit is connected to the emergency interface and is used to control the emergency interface to start in an emergency. The control circuit is also connected to the blower motor and is used to drive the blower motor to blow air.

14. The air blowing machine according to claim 13, characterized in that, The air blowing machine also includes: A housing for accommodating at least a portion of the structure of the blower motor and the control circuit, the housing also forming an air outlet and an air inlet, wherein when the blower motor is operating, air is blown from the air inlet through the blower motor to the air outlet; A flow guide is used to connect to the air outlet, and the flow guide is used to adjust the airflow effect of the air outlet.

15. The air blowing machine according to claim 14, characterized in that, The air inlet side of the air guide is connected to the air outlet, and the air outlet side of the air guide is used for air outlet. The area of ​​the air inlet side of the air guide is smaller than the area of ​​the air outlet side of the air guide, so as to concentrate the airflow at the air outlet.

16. The air blowing machine according to claim 13, characterized in that, The blower motor includes a motor and a fan blade, which are enclosed in the same housing. The air blower is used for cleaning, including blowing away dust, debris, or snow. The emergency interface of the air blower is used to connect to an external vehicle and provide power for starting the vehicle.

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