Control method for cordless heat gun

Abstract

The invention discloses a cordless heat gun control method, which belongs to the technical field of heating control, and comprises the following steps of: setting two judgment checks when a battery pack is installed, and eliminating a battery pack which is not matched with a heat gun by judging whether interface parameters of the battery pack are consistent with a power supply module and whether communication of the battery pack is matched with a communication module; the problems of over-temperature, over-current and the like caused by mismatching of the battery pack are avoided, the use safety of the heat gun is improved, and the problem that potential safety hazards are easily caused as the heat gun is easily provided with the unmatched battery pack is solved; the muzzle temperature of the hot air gun is adjusted by considering the air speed, the power of the heating core and the first temperature difference value and the second temperature difference value between the muzzle temperature and the set temperature, various factors influencing the muzzle temperature are fully considered, and therefore the accuracy and stability of muzzle temperature control are improved.

Description

Technical Field

[0001] The invention relates to the technical field of heating control, and in particular to a cordless hot air gun control method. Background Art

[0002] A hot air gun is a tool that uses an electric heating element to generate heat and blows the heat out through a fan. It is mainly composed of a heater, a fan, a control circuit, and other parts. The working principle of a hot air gun is that when its switch is turned on, the heater starts working, converting electrical energy into thermal energy, and then the fan blows out the hot air to form a high-temperature airflow. This high-temperature airflow can be used in a variety of processes and operations, such as welding, removing components, heat shrink packaging, removing paint, plastic molding, welding plastics, plastic pipe installation, thawing, and activating adsorbent materials. However, with more and more hot air gun products on the market, there is a possibility of using battery packs that do not match the hot air gun as a power source. This behavior has certain safety hazards. Due to different battery pack parameters, the hot air gun may be overloaded, resulting in excessive output temperature and causing safety accidents. At the same time, with the improvement of process quality, the requirements for hot air gun products to control the outlet temperature are also getting higher and higher. It is necessary to consider all factors affecting the outlet temperature in order to improve the accuracy and stability of the outlet temperature.

[0003] Chinese patent, publication number: CN117570574A, publication date: February 20, 2024, discloses a heating control method for a hot air gun, by obtaining the user demand mode, demand temperature, demand air volume, the current air outlet temperature and the current air volume of the hot air gun; when the user demand mode is the temperature priority mode, a temperature comparison result is generated according to the current air outlet temperature and the demand temperature, and an air volume comparison result is generated according to the current air volume and the demand air volume; when the current air outlet temperature does not enter the temperature range corresponding to the demand temperature, the air volume auxiliary temperature adjustment mode is enabled; the heating power and blowing power of the hot air gun are controlled according to the temperature comparison result and the air volume comparison result. Although it has a certain regulating effect on the temperature control, it does not take into account that the wind speed can also increase the air outlet temperature within a certain range, and does not take into account the influence of battery packs with different parameters on the operation of the hot air gun, and there are certain safety hazards. Summary of the invention

[0004] The present invention aims at the problem that the existing hot air guns are easy to install incompatible battery packs, which may easily cause safety hazards, and the temperature control is not stable due to few considerations for temperature regulation. The present invention provides a cordless hot air gun control method. When installing the battery pack, two judgment levels are set up to check whether the interface parameters of the battery pack are consistent with the power supply module and whether the communication of the battery pack matches the communication module, so as to exclude battery packs that are not compatible with the hot air gun, thereby avoiding the occurrence of problems such as overtemperature and overcurrent caused by battery pack mismatch, and improving the safety of the use of the hot air gun; the muzzle temperature of the hot air gun is adjusted by considering the wind speed, the power of the heating core, and the first temperature difference and the second temperature difference between the muzzle temperature and the set temperature, fully considering various factors that affect the muzzle temperature, thereby improving the accuracy and stability of the muzzle temperature control.

[0005] In a first aspect, a technical solution provided in an embodiment of the present invention is: a cordless hot air gun control method, comprising the following steps: S1. Obtain the battery pack interface parameters and determine whether the battery pack interface parameters are consistent with the power supply module interface parameters. If so, execute S2; otherwise, stop working; S2, the battery pack sends a matching request instruction, the communication module receives the matching request instruction and analyzes it to determine whether it can be matched, if yes, execute S3, if not, stop working; S3, the power supply module is connected to the fan drive circuit and the heating core drive circuit, and the corresponding working mode is selected based on the working requirements; S4. Real-time detection of the muzzle temperature of the hot air gun outlet, and adjustment of the fan speed and / or the output power of the heating core based on the muzzle temperature and the first temperature difference and the second temperature difference set for the corresponding working mode; setting a safety temperature threshold based on the configuration parameters of the heating core, generating a braking signal based on a numerical comparison result between the temperature of the heating core and the safety temperature threshold, and protecting the hot air gun based on the braking signal.

[0006] In this solution, since there are various types of hot air guns, and the structures of the hot air guns are basically the same, the battery pack installation interfaces they use may be very similar, which leads to the situation that the battery packs of different types of hot air guns are interchangeable. In this case, due to the different electrical parameters of different hot air guns and battery packs, it is very easy to cause the battery pack output power to be too large, causing the hot air gun to overload and cause a safety accident, or the battery pack output power is less than the rated power of the hot air gun, causing the hot air gun to fail to work normally. In order to solve these problems, two judgment levels are set up when installing the battery pack to exclude battery packs that are not compatible with the hot air gun by checking whether the interface parameters of the battery pack are consistent with the power supply module and whether the communication of the battery pack matches the communication module, thereby avoiding the occurrence of problems such as overtemperature and overcurrent caused by battery pack mismatch, and improving the safety of the use of the hot air gun; in order to improve the control stability of the output temperature of the hot air gun muzzle, the muzzle temperature of the hot air gun is adjusted by considering the wind speed, the power of the heating core, and the difference range between the muzzle temperature and the set temperature, and fully considering various factors affecting the muzzle temperature, thereby improving the accuracy and stability of the muzzle temperature control.

[0007] Preferably, in S1, obtaining the battery pack interface parameters and determining whether the battery pack interface parameters are consistent with the power supply module interface parameters include the following steps: Obtaining battery pack interface parameters, where the battery pack interface parameters include at least operating voltage, operating current, and interface type; if the battery pack can be installed on the hot air gun, then it is determined that the battery pack interface parameters are consistent with the power supply module interface parameters; If the battery pack cannot be installed on the heat gun, it is determined that the battery pack interface parameters are inconsistent with the power module interface parameters.

[0008] In this solution, since the structure of the battery pack installed in the hot air gun is similar, most battery packs can provide power to the hot air gun. The difference lies in whether the provided power supply is suitable and whether it will affect the normal operation of the hot air gun. Therefore, it is determined by judging whether the working voltage and working current of the battery pack are compatible with the power supply module and whether the interface type of the battery pack is consistent with the power supply module, that is, whether the battery pack can be connected to the hot air gun to preliminarily judge whether the battery pack is compatible with the hot air gun. If it is preliminarily judged to be compatible, the battery pack is used as the power supply for the subsequent judgment module to further analyze the adaptation of the battery pack, thereby reducing the probability of misjudgment.

[0009] Preferably, in S2, the battery pack sends a matching request instruction, and the communication module receives the matching request instruction and analyzes it to determine whether a match can be made, including the following steps: The battery pack sends a matching request instruction, wherein the matching request instruction includes at least a communication protocol and a communication parameter; If the communication protocol and communication parameters of the battery pack are consistent with the communication protocol and communication parameters of the communication module, it is determined that the communication module can match the battery pack; If the communication protocol and communication parameters of the battery pack are inconsistent with the communication protocol and communication parameters of the communication module, it is determined that the communication module cannot match the battery pack.

[0010] In this scheme, in order to further judge the compatibility of the battery pack and the hot air gun, since the interface parameters of the battery pack are consistent with the interface parameters of the power supply module, the battery pack serves as the power supply of the communication module and sends a matching request instruction to the communication module. When the two modules are matched, the most important thing is that the communication protocol needs to be consistent. Only when the communication protocol is consistent can data interaction be carried out between the two. Therefore, when judging whether the battery pack can match the communication module, the communication protocol, communication parameters such as IP address, and software interface parameters are adapted. If they are successfully adapted, the battery pack can establish a communication link with the communication module, thereby realizing communication matching between the battery pack and the communication module. At this time, it can be basically determined that the battery pack is compatible with the hot air gun, and the screening degree is relatively high.

[0011] Preferably, in S3, the power supply module is connected to the fan drive circuit and the heating core drive circuit, and a corresponding working mode is selected based on working requirements, including the following steps: The power supply module obtains the electric energy of the battery pack and provides power to the fan drive circuit and the heating core drive circuit; Obtain the material and size of the heated object, and determine the work requirements based on the material and size of the heated object; The corresponding working mode is selected based on working requirements, and the working mode at least includes set temperature, fan speed, heating core working power and preheating time.

[0012] In this solution, after determining that the battery pack is compatible with the hot air gun, the fan drive circuit and the heating core drive circuit are connected to the power supply module. If they are not compatible, they will not be connected, which plays a role of safety protection. Before the hot air gun works, it is necessary to set the working mode of the hot air gun according to the object heated by the hot air gun, including the set temperature, fan speed, heating core working power and preheating time. The preheating time is the theoretical time required from the start of the hot air gun to the muzzle temperature reaching the set temperature. After setting these parameters, the hot air gun can be started for heating. During the operation of the hot air gun, the muzzle temperature is kept consistent with the set temperature. The degree of fluctuation of the muzzle temperature can reflect the temperature control ability of the hot air gun. The smaller the temperature fluctuation, the stronger the temperature control ability and the more stable the output temperature.

[0013] Preferably, in S4, the muzzle temperature of the hot air gun outlet is detected in real time, and the speed of the fan and / or the output power of the heating core are adjusted based on the muzzle temperature and the first temperature difference and the second temperature difference set for the corresponding working mode, including the following steps: Real-time detection of the muzzle temperature of the hot air gun outlet. After the preheating time of the hot air gun is over, if the difference between the muzzle temperature of the hot air gun and the set temperature is less than or equal to the first temperature difference, the fan auxiliary adjustment mode is selected; If the difference between the muzzle temperature of the hot air gun and the set temperature is greater than the first temperature difference and less than or equal to the second temperature difference, the heating core auxiliary adjustment mode is selected; If the difference between the muzzle temperature of the hot air gun and the set temperature is greater than the second temperature difference, the mixed auxiliary adjustment mode is selected.

[0014] In this scheme, since the hot air gun will inevitably be affected by external factors such as the environment during its operation, which will cause a certain deviation between the muzzle temperature and the set temperature. In order to correct these deviations, three working modes are set according to the degree of deviation. When the deviation between the muzzle temperature and the set temperature is small, the output power of the heating core can be kept unchanged, and only the rotation speed of the fan can be changed to adjust the air outlet speed of the muzzle. Within a certain range, increasing the air outlet speed can take away more heat from the heating core, thereby increasing the muzzle temperature. Reducing the air outlet speed will reduce the speed of taking away the heat from the heating core, thereby reducing the muzzle temperature. When the deviation between the muzzle temperature and the set temperature is large, When the temperature is large, the fan rotation speed can be maintained unchanged to adjust the output power of the heater core to adjust the muzzle temperature. By adjusting the output power of the heater core, the muzzle temperature can be changed within a larger range. When the deviation between the muzzle temperature and the set temperature is too large, in order to expand the range of temperature adjustment, the fan and the heater core are adjusted in coordination with each other to expand the adjustment range of the muzzle temperature. In this way, corresponding solutions can be selected for different changes in muzzle temperature, which not only improves the muzzle temperature range that the hot air gun can output, but also improves the hot air gun's ability to adjust the muzzle temperature, so that it can adapt to different working environments and ensure the stability of the muzzle temperature.

[0015] Preferably, if the difference between the muzzle temperature of the hot air gun and the set temperature is less than or equal to the first temperature difference, the fan-assisted adjustment mode is selected, including the following steps: If the muzzle temperature of the hot air gun is lower than the set temperature, and the difference is less than or equal to the first temperature difference, the speed of the fan is increased until the muzzle temperature is equal to the set temperature; If the temperature at the muzzle of the hot air gun is greater than the set temperature, and the difference is less than or equal to the first temperature difference, the speed of the fan is reduced until the muzzle temperature is equal to the set temperature.

[0016] In this scheme, in order to adjust the muzzle temperature within a small range, the speed of the fan is changed to adjust it. Generally speaking, the larger the air volume, the faster the heating speed, but it may also cause local overheating; the smaller the air volume, the slower the heating speed, but the temperature distribution is more uniform. However, the determining factor of the muzzle temperature is still the output power of the heating core. Therefore, adjusting the muzzle temperature within a small range by changing the speed of the fan not only has higher adjustment accuracy, but also generates less additional energy consumption during adjustment.

[0017] Preferably, if the difference between the muzzle temperature of the hot air gun and the set temperature is greater than the first temperature difference and less than or equal to the second temperature difference, the heating core auxiliary adjustment mode is selected, including the following steps: If the muzzle temperature of the hot air gun is lower than the set temperature, and the difference is greater than the first temperature difference and less than or equal to the second temperature difference, the output power of the heating core is increased until the muzzle temperature is equal to the set temperature; If the muzzle temperature of the hot air gun is greater than the set temperature, and the difference is greater than the first temperature difference and less than or equal to the second temperature difference, the output power of the heating core is reduced until the muzzle temperature is equal to the set temperature.

[0018] In this scheme, in order to adjust the muzzle temperature within a larger range, the blowing speed is maintained unchanged by keeping the fan speed unchanged, and the muzzle temperature is adjusted by changing the output power of the heating core. Generally speaking, the higher the output power of the heating core, the higher the muzzle temperature and the faster the heating speed. However, the temperature scale for adjusting the muzzle temperature by adjusting the output power of the heating core is large, so the adjustment accuracy is low. When the difference between the muzzle temperature and the set temperature is adjusted to a smaller difference by changing the output power of the heating core, the muzzle temperature can be accurately adjusted by keeping the output power of the heating core unchanged and adjusting the fan speed, thereby improving the adjustment accuracy.

[0019] Preferably, if the difference between the muzzle temperature of the hot air gun and the set temperature is greater than the second temperature difference, the mixed auxiliary adjustment mode is selected, including the following steps: If the muzzle temperature of the hot air gun is lower than the set temperature, and the difference is greater than the second temperature difference, the speed of the fan and the output power of the heating core are increased synchronously until the muzzle temperature is equal to the set temperature; If the muzzle temperature of the hot air gun is greater than the set temperature, and the difference is greater than the second temperature difference, the speed of the fan and the output power of the heating core are synchronously reduced until the muzzle temperature is equal to the set temperature.

[0020] In this solution, when the difference between the muzzle temperature and the set temperature is too large, in order to quickly reduce the deviation, the fan speed and the heating core output power are changed at the same time, the difference is first reduced through a larger adjustment scale, and then the corresponding adjustment means are selected according to the set first temperature difference and second temperature difference boundaries, and the adjustment accuracy is gradually improved until the muzzle temperature is equal to the set temperature. The muzzle temperature is adjusted by adopting a temperature adjustment method from coarse to fine and from fast to slow. Under the premise of ensuring the adjustment accuracy, the adjustment range is expanded and the ability of the hot air gun to adapt to the working environment is improved.

[0021] Preferably, a safety temperature threshold is set based on the configuration parameters of the heating core, a braking signal is generated based on the numerical comparison result between the temperature of the heating core and the safety temperature threshold, and the hot air gun is protected based on the braking signal, including the following steps: obtaining the corresponding safety temperature threshold based on the configuration parameters of the heating core, and if the temperature of the heating core exceeds the safety temperature threshold, the heating core is disconnected and an alarm signal is sent; If the temperature of the heating core drops below the safe temperature threshold, it will automatically recover.

[0022] In this solution, a safety temperature threshold is set according to configuration parameters such as the material of the heating core. When the temperature of the heating core exceeds the safety temperature threshold, it means that the heating core is in an overloaded operating state and there is a safety hazard. In order to improve the response speed of protection when the hot air gun is overheated, the heating core can adopt a recoverable fuse material. When the heating core is overheated, it will automatically disconnect and automatically restore when the temperature recovers. The hot air gun is protected by the automatic disconnection and restoration of the heating core according to the temperature. When overheating, the staff can be reminded by means of alarm bells, warning lights, etc. that the hot air gun has a fault and needs to be inspected and repaired, thereby reducing the safety hazards caused by the failure of the hot air gun and ensuring the personal safety of the staff.

[0023] Preferably, the first temperature difference and the second temperature difference are both positive numbers, and the first temperature difference is smaller than the second temperature difference.

[0024] In this solution, the first temperature difference is smaller than the second temperature difference. The first temperature difference indicates that the muzzle temperature deviates less from the set temperature, while the second temperature difference indicates that the muzzle temperature deviates more from the set temperature.

[0025] The beneficial effects of the present invention are as follows: (1) The present invention sets up two judgment checkpoints when installing the battery pack, and checks whether the interface parameters of the battery pack are consistent with the power supply module and whether the communication of the battery pack matches the communication module to exclude the battery pack that is not compatible with the hot air gun, thereby avoiding the occurrence of problems such as overheating and overcurrent caused by battery pack mismatch, and improving the safety of the use of the hot air gun; (2) The present invention adjusts the muzzle temperature of the hot air gun by considering the wind speed, the power of the heating core, and the difference range between the muzzle temperature and the set temperature, and fully considers various factors that affect the muzzle temperature. When the difference between the muzzle temperature and the set temperature is small, the air outlet speed is selected to accurately adjust the muzzle temperature. When the difference between the muzzle temperature and the set temperature is large, the heating core and / or the air outlet speed are selected to coordinately adjust to quickly reduce the difference between the muzzle temperature and the set temperature. When the difference is small, the muzzle temperature is accurately adjusted by adjusting the air outlet speed. The speed of adjusting the muzzle temperature is ensured while the accuracy of the adjustment is ensured, thereby improving the accuracy and precision of the muzzle temperature control and improving the stability of the muzzle temperature output by the hot air gun.

[0026] The above invention content is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the drawings to represent the same parts.

[0028] Figure 1 This is a flow chart of a cordless hot air gun control method of the present invention; Figure 2 This is a circuit schematic diagram of the power supply module of the present invention; Figure 3 is a circuit schematic diagram of the communication module of the present invention; Figure 4 The diagram is a circuit schematic diagram of the fan drive circuit and the heating core drive circuit of the present invention. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the operations (or steps) as sequential processes, many of the operations (or steps) therein can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the drawings; the process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0031] Example: Figure 1 As shown, in order to solve the problem that the existing hot air guns in the prior art are easy to install unmatched battery packs, which may easily cause safety hazards, and the temperature control is not stable enough due to the few factors considered in temperature regulation, this embodiment provides a cordless hot air gun control method, including the following steps: S1: Get the battery pack interface parameters and determine whether the battery pack interface parameters are consistent with the power supply module interface parameters. If so, execute S2, otherwise stop working.

[0032] In this embodiment, obtaining the battery pack interface parameters and determining whether the battery pack interface parameters are consistent with the power supply module interface parameters include the following steps: Obtaining battery pack interface parameters, where the battery pack interface parameters include at least operating voltage, operating current, and interface type; if the battery pack can be installed on the hot air gun, then it is determined that the battery pack interface parameters are consistent with the power supply module interface parameters; If the battery pack cannot be installed on the heat gun, it is determined that the battery pack interface parameters are inconsistent with the power module interface parameters.

[0033] In this embodiment, since the structure of the battery pack installed in the hot air gun is similar, most battery packs can provide power to the hot air gun. The difference lies in whether the provided power supply is suitable and whether it will affect the normal operation of the hot air gun. Therefore, it is determined by judging whether the working voltage and working current of the battery pack are compatible with the power supply module and whether the interface type of the battery pack is consistent with the power supply module, that is, whether the battery pack can be connected to the hot air gun, to preliminarily judge whether the battery pack is compatible with the hot air gun. If it is preliminarily judged to be compatible, the battery pack is used as the power supply of the subsequent judgment module to further analyze the adaptation of the battery pack, thereby reducing the probability of misjudgment.

[0034] like Figure 2 As shown, it is a circuit schematic diagram of the power supply module of this embodiment, including transistor Q4, resistor R2, resistor R3, resistor R5, capacitor C10, power module U5, power module U1, capacitor C11, capacitor C3, resistor R34, capacitor C8, resistor R6, Zener diode DZ1, transistor Q6, resistor R4, MOS tube Q2, resistor R12, capacitor C2, and resistor R10.

[0035] The first end of the resistor R2 is connected to the P+ electrode of the battery pack and the emitter of the transistor Q4 respectively, and the second end of the resistor R2 is connected to the first end of the resistor R3 and the base of the transistor Q4 respectively.

[0036] The second end of the resistor R3 is connected to the cathode of the voltage-stabilizing diode DZ1 , and the anode of the voltage-stabilizing diode DZ1 is connected to the collector of the transistor Q8 .

[0037] The emitter of the transistor Q8 is grounded, the base of the transistor Q8 is connected to the first end of the resistor R4, and the second end of the resistor R4 receives the total power control signal PWR_HOLD, which controls the switch of the power supply module.

[0038] The collector of the transistor Q4 is connected to the first end of the resistor R5. A device detection terminal VBUS in the USB connection is provided between the transistor Q4 and the resistor R5 for identifying the insertion status of the device. By detecting the voltage on VBUS, it can be determined whether the interface parameters of the battery pack and the power supply module are consistent, whether they are correctly connected and can start to supply power to the power supply module.

[0039] The second end of the resistor R5 is connected to the first end of the capacitor C10 and the input end of the power module U5 respectively, the second end of the capacitor C10 and the ground end of the power module U5 are grounded, and the output end of the power module U5 outputs a 12V voltage.

[0040] The output end of the power module U5 is connected to the first end of the capacitor C11 and the first end of the resistor R34 respectively, the second end of the resistor R34 and the first end of the capacitor C3 are connected to the input end of the power module U1, and the power modules U5 and U1 are connected in series to reduce the burden of a single power module and improve output stability.

[0041] The output end of the power module U1 outputs a 5V voltage, and the output end of the power module U1 is connected to the first end of the capacitor C8 and the resistor R6. The second ends of the capacitor C11, the capacitor C3, the capacitor C8, and the resistor R6 are grounded, and the ground end of the power module U1 is grounded.

[0042] The gate of the MOS transistor Q2 is connected to the first end of the resistor R12, the drain of the MOS transistor Q2 is connected to the collector of the transistor Q8, and the drain of the MOS transistor Q2 and the second end of the resistor R12 are grounded.

[0043] The first end of the capacitor C2 is connected to the gate of the MOS tube Q2, the second end of the capacitor C2 is connected to the first end of the resistor R10, and the second end of the resistor R10 is connected to the P+ pole of the battery pack.

[0044] Figure 2 The P+ in the middle is the positive connection position of the battery pack, which provides power for the entire circuit. When the total power control signal PWR_HOLD is at a high level, the transistor Q8 is turned on, and the base level of the transistor Q4 is pulled up through the voltage-stabilizing diode DZ1 and the resistor R3, so that the transistor Q4 is turned on, and the battery pack starts to provide power for the power module U5. U5 starts to work and converts the voltage into a stable 12V voltage, and serves as the input of the power module U1. The power module U1 also starts to work. After internal processing, it outputs a stable 5V voltage for components that require a 5V working voltage. The 5V voltage is mainly used to drive some control chips in the hot air gun.

[0045] S2: The battery pack sends a matching request instruction, and the communication module receives the matching request instruction and analyzes it to determine whether it can be matched. If so, S3 is executed, otherwise it stops working.

[0046] In this embodiment, the battery pack sends a matching request instruction, and the communication module receives the matching request instruction and analyzes it to determine whether a match can be made, including the following steps: The battery pack sends a matching request instruction, wherein the matching request instruction includes at least a communication protocol and a communication parameter; If the communication protocol and communication parameters of the battery pack are consistent with the communication protocol and communication parameters of the communication module, it is determined that the communication module can match the battery pack; If the communication protocol and communication parameters of the battery pack are inconsistent with the communication protocol and communication parameters of the communication module, it is determined that the communication module cannot match the battery pack.

[0047] In order to further judge the compatibility of the battery pack and the hot air gun, this embodiment uses the battery pack as the power source of the communication module, and sends a matching request instruction to the communication module because the interface parameters of the battery pack are consistent with the interface parameters of the power supply module. When the two modules are matched, the most important thing is that the communication protocol needs to be consistent. Only when the communication protocol is consistent can data interaction be carried out between the two. Therefore, when judging whether the battery pack can be matched with the communication module, the communication protocol, communication parameters such as IP address, and software interface parameters are adapted. If they are successfully adapted, the battery pack can establish a communication link with the communication module, thereby realizing communication matching between the battery pack and the communication module. At this time, it can be basically determined that the battery pack is compatible with the hot air gun, and the screening degree is relatively high.

[0048] like Figure 3As shown, it is a circuit schematic diagram of the communication module of this embodiment, including a voltage-stabilizing diode ZD1, a resistor R47, a resistor R116, an induction coil L1, a resistor R120, a diode D11, a diode D10, a resistor R114, a resistor R121, a resistor R119, a transistor Q1, a transistor Q12, a resistor R123, a resistor R117, a resistor R118, a resistor R124, a transistor Q10, a resistor R125, a resistor R122, a capacitor C30, a capacitor C31, a capacitor C32 and a communication chip U4.

[0049] The voltage zener diode ZD1 is connected in parallel with the resistor R47 , the cathode of the voltage zener diode is connected to the 12V voltage, and the anode of the voltage zener diode is connected to the first end of the resistor R120 .

[0050] The second end of the resistor R120 is connected to the positive electrodes of the diode D10 and the diode D11 respectively, the cathode of the diode D10 is connected to the first end of the resistor R114, and the cathode of the diode D11 is connected to the first end of the resistor R121, the second end of the induction coil L1 and the first end of the resistor R119 respectively; the second end of the resistor R114 is connected to the second end of the resistor R121 and the base of the transistor Q1, the emitter of the transistor Q1 is connected to the cathode of the diode D10, and the collector of the transistor Q1 is connected to the first end of the resistor R123.

[0051] The second end of the resistor R123 is connected to the first end of the resistor R117 , and the second end of the resistor R117 is connected to the emitter of the transistor Q10 .

[0052] The base of the transistor Q10 is connected to the second end of the resistor R123 and the first end of the resistor R117 , the collector of the transistor Q10 is connected to the second end of the resistor R125 , and the first end of the resistor R125 is connected to a 5V voltage.

[0053] The first end of the resistor R122 is connected to the second end of the resistor R125 , and the second end of the resistor R122 is connected to the P2 end of the communication chip U4 .

[0054] The first end of the resistor R116 receives the matching request instruction DATA of the battery pack, the second end of the resistor R116 is connected to the first end of the induction coil L1, and the second end of the induction coil L1 is connected to the first end of the resistor R119.

[0055] The second end of the resistor R119 is connected to the collector of the transistor Q12, the emitter of the transistor Q12 is grounded, the first end of the base domain resistor R124 of the transistor Q12 is connected to the first end of the resistor R118, and the second end of the resistor R118 is connected to the P1 end of the communication chip U4.

[0056] The VDD terminal of the communication chip is connected to the first terminal of the capacitor C31 and the 5V voltage respectively. The first terminal of the capacitor C31 is also connected to the first terminal of the capacitor C30. The second terminals of the capacitor C30 and the capacitor C31 are grounded.

[0057] A first end of the capacitor C32 is connected to the collector of the transistor Q1 , and a second end of the capacitor C32 is grounded.

[0058] Figure 3 The communication module receives the 12V working voltage and 5V chip driving voltage provided by the power supply module, wherein the 5V chip driving voltage is used to drive the communication chip U4, DATA is the matching request instruction of the battery pack, and 12V is the driving voltage of the communication module. After the matching request instruction of the battery pack is sent, the 12V voltage pulls up the base level of the transistor Q1, thereby turning on the transistor Q1. Therefore, the base level of the transistor Q10 is pulled up to turn on the transistor Q10, thereby providing a high level to the P2 end of the communication chip U4. The matching request instruction DATA of the battery pack transmits the data to the P1 end of the communication chip U4 through the induction coil L1 and the transistor Q12. After matching and analysis by the communication chip, it is determined whether the communication module and the battery pack are matched successfully. If the communication module and the battery pack are matched successfully, the TX port of the communication chip will send the U1-TX instruction, which is sent to the power supply module through the circuit. After receiving the information, the power supply module will connect to the heating core drive circuit and the fan drive circuit to provide driving power for the heating core drive circuit and the fan drive circuit.

[0059] S3: The power supply module is connected to the fan drive circuit and the heating core drive circuit, and the corresponding working mode is selected based on working requirements.

[0060] In this embodiment, the power supply module is connected to the fan drive circuit and the heating core drive circuit, and a corresponding working mode is selected based on working requirements, including the following steps: The power supply module obtains the electric energy of the battery pack and provides power to the fan drive circuit and the heating core drive circuit; Obtain the material and size of the heated object, and determine the work requirements based on the material and size of the heated object; The corresponding working mode is selected based on working requirements, and the working mode at least includes set temperature, fan speed, heating core working power and preheating time.

[0061] In this embodiment, after determining that the battery pack is compatible with the hot air gun, the fan drive circuit and the heating core drive circuit are connected to the power supply module. If they are not compatible, they will not be connected, which plays a role of safety protection. Before the hot air gun works, it is necessary to set the working mode of the hot air gun according to the object heated by the hot air gun, including the set temperature, fan speed, heating core working power and preheating time, wherein the preheating time is the theoretical time required from the start of the hot air gun to the muzzle temperature reaching the set temperature. After setting these parameters, the hot air gun can be started for heating. During the operation of the hot air gun, the muzzle temperature is kept consistent with the set temperature. The degree of fluctuation of the muzzle temperature can reflect the temperature control ability of the hot air gun. The smaller the temperature fluctuation, the stronger the temperature control ability and the more stable the output temperature.

[0062] like Figure 4 As shown, it is a schematic diagram of the fan drive circuit and the heating core drive circuit of this embodiment, including a power switch S1, a motor M1, a diode D3, a MOS tube Q7, a resistor R26, a resistor R25, a resistor R27, a resistor RS, a capacitor C12, a resistor R35, a capacitor C14, a heating core HEATER1, a MOS tube Q11, a resistor R31, a resistor R33, a resistor RS1, a resistor R23, a MOS tube Q6, a resistor R21, a resistor R24, a capacitor C9, a resistor R36, a capacitor C13, a resistor R20, a voltage regulator diode DZ2, a capacitor C7, a drive control chip U3 and a resistor R22.

[0063] The first end of the power switch S1 is connected to the B+ pole of the battery pack, and the second end is connected to the P+ pole of the battery pack. The P+ pole of the battery pack is connected to the M+ pole of the motor.

[0064] The M-pole of the motor is connected to the drain of the MOS tube Q7, the gate of the MOS tube Q7 is connected to the first end of the resistor R26, the second end of the resistor R26 receives the motor drive control signal MOTO PWM, and the motor M1 is connected in parallel with the diode D3.

[0065] The source of the MOS transistor Q7 is connected to the first end of the resistor RS, and the second end of the resistor RS is grounded.

[0066] A first end of the resistor R25 is connected to the gate of the MOS transistor Q7 , and a second end of the resistor R25 is connected to the source of the MOS transistor Q7 .

[0067] A first end of the resistor R27 is connected to the source of the MOS tube Q7 , and a second end of the resistor R27 receives the motor overcurrent protection signal ISENSE MOTOR .

[0068] A first end of the capacitor C12 is connected to a second end of the resistor R27 , and a second end of the capacitor C12 is grounded.

[0069] The first end of the resistor R35 is connected to the source of the MOS tube Q7, and the second end of the resistor R35 receives the motor IP comparison signal COMP IP MOTOR. An amplifier or a comparator is used to monitor or control certain parameters of the motor (such as current, speed, position, etc.), and the motor is controlled through a specific IP technology or module.

[0070] The second end of the power switch S1 is also connected to the first end HEATER+ of the heating core, the second end HEATER of the heating core is connected to the drain of the MOS tube Q11, and the heating core HEATER is connected in parallel with the diode D4.

[0071] The gate of the MOS tube Q11 is connected to the first end of the resistor R31, the second end of the resistor R31 is connected to the output end of the drive control chip U3, and the drive control chip U3 outputs the heating core drive control signal HEATER DRV.

[0072] The source of the MOS transistor Q11 is connected to a first end of the resistor RS1 , and a second end of the resistor RS1 is grounded.

[0073] A first end of the resistor R33 is connected to the gate of the MOS transistor Q11 , and a second end of the resistor R33 is connected to the source of the MOS transistor Q11 .

[0074] The drain of the MOS tube Q6 is connected to the second end HEATER- of the heating core, the gate of the MOS tube Q6 is connected to the first end of the resistor R21, the second end of the resistor R21 is respectively connected to the second end of the resistor R31 and the output end of the driving control chip U3, and the source of the MOS tube Q6 is connected to the first end of the resistor RS1.

[0075] The first end of the resistor R24 ​​is connected to the gate and source of the MOS transistor Q6 respectively.

[0076] The first end of the resistor R23 is connected to the first end of the resistor RS1 , and the second end of the resistor R23 receives the heating core overcurrent protection signal ISENSE HRATER.

[0077] The first end of the resistor R36 is connected to the first end of the resistor RS1, and the second end of the resistor R36 receives the heating core IP comparison signal COMP IP HEATER. An amplifier or comparator is used to monitor or control certain parameters of the heating core (such as current, power, etc.), and the heating core is controlled through specific IP technology or module.

[0078] The first end of the capacitor C9 is connected to the second end of the resistor R23 , the first end of the capacitor C13 is connected to the second end of the resistor R36 , and the second ends of the capacitor C9 and the capacitor C13 are both grounded.

[0079] The VCC end of the drive control chip U3 is connected to the second end of the resistor R20, the second end of the resistor R20 is connected to the device detection end VBUS, the first end of the capacitor C7 is connected to the second end of the resistor R20, the second end of the capacitor C7 is grounded, and the voltage regulator diode DZ2 is connected in parallel with the capacitor C7.

[0080] The signal input terminal VIN of the driving control chip U3 is connected to the first end of the resistor R22, and the second end of the resistor R22 receives the heating core collection signal HEATER PWM.

[0081] When the power switch S1 is closed and the motor drive signal MOTO PWM is at a high level, the MOS tube Q7 is turned on, so that the motor is driven and the motor starts to rotate. At the same time, during the rotation of the motor, there are also motor overcurrent protection signal ISENSEMOTOR and motor IP comparison signal COMP IP MOTOR to protect the motor from overcurrent and monitor and compare the current passing through the motor to ensure the safe operation of the motor.

[0082] When the driving control chip U3 receives the heating core acquisition signal HEATER PWM, it analyzes the signal to obtain the gear that the heating core needs to adjust. After the analysis is completed, the heating core driving control signal HEATER DRV is output. The driving signal will turn on the MOS tubes Q6 and Q11 at the same time. The voltages of the two MOS tubes are the same and are affected by the driving control signal HEATER DRV. The two MOS can increase the conduction current and thus improve the ability to withstand current, reduce the heating of the MOS tube, extend the service life of the MOS tube, and improve the product life and safety. During the operation of the heating core, there are also heating core overcurrent protection signals ISENSE HEATER and heating core IP comparison signals COMP IP HEATER to protect the heating core from overcurrent and monitor and compare the current passing through the heating core to ensure the safe operation of the heating core.

[0083] S4: Detect the muzzle temperature of the hot air gun outlet in real time, and adjust the fan speed and / or the output power of the heating core based on the muzzle temperature and the first temperature difference and the second temperature difference set for the corresponding working mode; set a safety temperature threshold based on the configuration parameters of the heating core, generate a braking signal based on the numerical comparison result between the heating core temperature and the safety temperature threshold, and protect the hot air gun based on the braking signal.

[0084] In this embodiment, the muzzle temperature of the hot air gun outlet is detected in real time, and the speed of the fan and / or the output power of the heating core are adjusted based on the muzzle temperature and the first temperature difference and the second temperature difference set for the corresponding working mode, including the following steps: Real-time detection of the muzzle temperature of the hot air gun outlet. After the preheating time of the hot air gun is over, if the difference between the muzzle temperature of the hot air gun and the set temperature is less than or equal to the first temperature difference, the fan auxiliary adjustment mode is selected; If the difference between the muzzle temperature of the hot air gun and the set temperature is greater than the first temperature difference and less than or equal to the second temperature difference, the heating core auxiliary adjustment mode is selected; If the difference between the muzzle temperature of the hot air gun and the set temperature is greater than the second temperature difference, the mixed auxiliary adjustment mode is selected, and the first temperature difference is less than the second temperature difference.

[0085] In the present embodiment, since the hot air gun is inevitably affected by external factors such as the environment during operation, a certain deviation will occur between the muzzle temperature and the set temperature. In order to correct these deviations, three working modes are set according to the degree of deviation. When the deviation between the muzzle temperature and the set temperature is small, the output power of the heating core remains unchanged, and only the rotation speed of the fan is changed to adjust the air outlet speed of the muzzle. Within a certain range, increasing the air outlet speed can take away more heat from the heating core, thereby increasing the muzzle temperature, and reducing the air outlet speed will reduce the speed of taking away the heat from the heating core, thereby reducing the muzzle temperature; when the deviation between the muzzle temperature and the set temperature is large, When the muzzle temperature is low, the fan rotation speed can be maintained unchanged to adjust the output power of the heating core to adjust the muzzle temperature. By adjusting the output power of the heating core, the muzzle temperature can be changed within a larger range. When the deviation between the muzzle temperature and the set temperature is too large, in order to expand the range of temperature adjustment, the fan and the heating core are adjusted in coordination with each other to expand the adjustment range of the muzzle temperature. In this way, corresponding solutions can be selected for different changes in muzzle temperature, which not only improves the muzzle temperature range that the hot air gun can output, but also improves the ability of the hot air gun to adjust the muzzle temperature, so that it can adapt to different working environments and ensure the stability of the muzzle temperature.

[0086] In this embodiment, if the difference between the muzzle temperature of the hot air gun and the set temperature is less than or equal to the first temperature difference, the fan-assisted adjustment mode is selected, including the following steps: If the muzzle temperature of the hot air gun is lower than the set temperature, and the difference is less than or equal to the first temperature difference, the speed of the fan is increased until the muzzle temperature is equal to the set temperature; in this embodiment, the first temperature difference can be selected as 5°C but is not limited to 5°C; If the temperature at the muzzle of the hot air gun is greater than the set temperature, and the difference is less than or equal to the first temperature difference, the speed of the fan is reduced until the muzzle temperature is equal to the set temperature.

[0087] In order to adjust the muzzle temperature within a small range, this embodiment adjusts the temperature by changing the speed of the fan. Generally speaking, the larger the air volume, the faster the heating speed, but it may also cause local overheating; the smaller the air volume, the slower the heating speed, but the temperature distribution is more uniform. However, the determining factor of the muzzle temperature is still the output power of the heating core. Therefore, adjusting the muzzle temperature within a small range by changing the speed of the fan not only has higher adjustment accuracy, but also generates less additional energy consumption during adjustment.

[0088] This embodiment adjusts by changing the speed of the fan. When the speed at which the heating core outputs heat is greater than the speed at which the air generated by the fan takes away the heat, increasing the speed of the fan can increase the speed at which the heat output from the heating core is taken away, thereby increasing the muzzle temperature, while reducing the speed of the fan can reduce the speed at which the heat output from the heating core is taken away, thereby reducing the muzzle temperature. However, when the speed at which the heating core outputs heat is less than the speed at which the wind generated by the fan takes away the heat, increasing the speed of the fan will instead reduce the heat carried by the wind and will reduce the muzzle temperature. Therefore, in this embodiment, when the muzzle temperature of the hot air gun is lower than the set temperature and the difference is small, it is necessary to ensure that the speed at which the heating core outputs heat is slightly greater than the speed at which the air takes away the heat output from the heating core. In this way, the temperature difference can be within the first temperature difference. The muzzle temperature can be increased by increasing the fan speed, and the muzzle temperature can be reduced by reducing the fan speed.

[0089] In this embodiment, if the difference between the muzzle temperature of the hot air gun and the set temperature is greater than the first temperature difference and less than or equal to the second temperature difference, the heating core auxiliary adjustment mode is selected, including the following steps: If the muzzle temperature of the hot air gun is lower than the set temperature, and the difference is greater than the first temperature difference and less than or equal to the second temperature difference, the output power of the heating core is increased until the muzzle temperature is equal to the set temperature; the second temperature difference in this embodiment can be selected as 10°C but is not limited to 10°C; If the muzzle temperature of the hot air gun is greater than the set temperature, and the difference is greater than the first temperature difference and less than or equal to the second temperature difference, the output power of the heating core is reduced until the muzzle temperature is equal to the set temperature.

[0090] In order to adjust the muzzle temperature within a larger range, the present embodiment maintains the blowing speed by keeping the fan speed unchanged, and adjusts the muzzle temperature by changing the output power of the heating core. Generally speaking, the higher the output power of the heating core, the higher the muzzle temperature and the faster the heating speed. However, the temperature scale for adjusting the muzzle temperature by adjusting the output power of the heating core is large, so the adjustment accuracy is low. When the difference between the muzzle temperature and the set temperature is adjusted to a smaller difference by changing the output power of the heating core, the muzzle temperature can be accurately adjusted by keeping the output power of the heating core unchanged and adjusting the fan speed, thereby improving the adjustment accuracy.

[0091] In this embodiment, if the difference between the muzzle temperature of the hot air gun and the set temperature is greater than the second temperature difference, the mixed auxiliary adjustment mode is selected, including the following steps: If the muzzle temperature of the hot air gun is lower than the set temperature, and the difference is greater than the second temperature difference, the speed of the fan and the output power of the heating core are increased synchronously until the muzzle temperature is equal to the set temperature; If the muzzle temperature of the hot air gun is greater than the set temperature, and the difference is greater than the second temperature difference, the speed of the fan and the output power of the heating core are synchronously reduced until the muzzle temperature is equal to the set temperature.

[0092] In this embodiment, when the difference between the muzzle temperature and the set temperature is too large, in order to quickly reduce the deviation, the fan speed and the heating core output power are changed at the same time, the difference is first reduced through a larger adjustment scale, and then the corresponding adjustment means are selected according to the set first temperature difference and second temperature difference boundaries, and the adjustment accuracy is gradually improved until the muzzle temperature is equal to the set temperature. The muzzle temperature is adjusted by adopting a temperature adjustment method from coarse to fine and from fast to slow. Under the premise of ensuring the adjustment accuracy, the adjustment range is expanded and the ability of the hot air gun to adapt to the working environment is improved.

[0093] In this embodiment, a safety temperature threshold is set based on the configuration parameters of the heating core, a braking signal is generated based on the numerical comparison result between the temperature of the heating core and the safety temperature threshold, and the hot air gun is protected based on the braking signal, including the following steps: obtaining the corresponding safety temperature threshold based on the configuration parameters of the heating core, and if the temperature of the heating core exceeds the safety temperature threshold, the heating core is disconnected and an alarm signal is sent; If the temperature of the heating core drops below the safe temperature threshold, it will automatically recover.

[0094] In this embodiment, a safe temperature threshold is set according to configuration parameters such as the material of the heating core. When the temperature of the heating core exceeds the safe temperature threshold, it means that the heating core is in an overloaded operating state and there is a safety hazard. In order to improve the response speed of protection when the hot air gun is overheated, the heating core can adopt a recoverable fuse material. When the heating core is overheated, it will automatically disconnect and automatically restore when the temperature recovers. The hot air gun is protected by the automatic disconnection and restoration of the heating core according to the temperature. When overheating, the staff can be reminded by means of alarm bells, warning lights, etc. that the hot air gun has a fault and needs to be checked and repaired, thereby reducing the safety hazard caused by the failure of the hot air gun and ensuring the personal safety of the staff.

[0095] In this embodiment, the rotation speed of the fan and the output power of the heating core can be controlled by including but not limited to changing the duty cycle of the PWM wave.

[0096] In order to control the speed of the fan and the output power of the heating core, this embodiment adopts PWM wave as the driving signal of the fan and / or the heating core, and adjusts the fan speed and / or the output power of the heating core by adjusting the duty cycle of the PWM wave. When the duty cycle of the PWM wave increases, the fan speed increases and the output power of the heating core increases. When the duty cycle of the PWM wave decreases, the fan speed decreases and the output power of the heating core decreases. Control through PWM wave can accurately adjust the fan speed and the output power of the heating core, and it is convenient to adjust the muzzle temperature in a small range by adjusting the fan speed, thereby ensuring the muzzle temperature adjustment accuracy of the hot air gun and facilitating precise control of the heating core.

[0097] In this embodiment, since there are various types of hot air guns, and the structures of the hot air guns are basically the same, the battery pack installation interfaces they use may be very similar, which leads to the situation that the battery packs of different types of hot air guns are interchangeable. In this case, due to the different electrical parameters of different hot air guns and battery packs, it is very easy to cause the battery pack output power to be too large, causing the hot air gun to overload and cause a safety accident, or the battery pack output power is less than the rated power of the hot air gun, causing the hot air gun to fail to work normally. In order to solve these problems, two judgment levels are set up when installing the battery pack to exclude battery packs that are not compatible with the hot air gun by checking whether the interface parameters of the battery pack are consistent with the power supply module and whether the communication of the battery pack is matched with the communication module, thereby avoiding the occurrence of problems such as overtemperature and overcurrent caused by battery pack mismatch, and improving the safety of the use of the hot air gun. In order to improve the control stability of the output temperature of the hot air gun muzzle, the muzzle temperature of the hot air gun is adjusted by considering the wind speed, the power of the heating core, and the difference range between the muzzle temperature and the set temperature, and fully considering various factors affecting the muzzle temperature, thereby improving the accuracy and stability of the muzzle temperature control.

[0098] It can be seen from the above embodiments that at least the following substantial effects are achieved: (1) The present invention sets up two judgment checkpoints when installing the battery pack, and checks whether the interface parameters of the battery pack are consistent with the power supply module and whether the communication of the battery pack matches the communication module to exclude battery packs that are incompatible with the hot air gun, thereby avoiding the occurrence of problems such as overheating and overcurrent caused by battery pack mismatch, and improving the safety of the use of the hot air gun; (2) The present invention adjusts the muzzle temperature of the hot air gun by considering the wind speed, the power of the heating core, and the difference range between the muzzle temperature and the set temperature, and fully considers various factors that affect the muzzle temperature, thereby improving the accuracy and precision of the muzzle temperature control, thereby improving the stability of the muzzle temperature output by the hot air gun.

[0099] The specific implementation described above is a preferred implementation of a cordless hot air gun control method of the present invention, and is not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to this specific implementation. All equivalent changes made in accordance with the shape and structure of the present invention are within the protection scope of the present invention.

Claims

1. A cordless hot air gun control method, Features: The following steps are involved: S1. Obtain the battery pack interface parameters and determine whether the battery pack interface parameters are consistent with the power supply module interface parameters. If so, execute S2; otherwise, stop working; S2, the battery pack sends a matching request instruction, the communication module receives the matching request instruction and analyzes it to determine whether it can be matched, if yes, execute S3, if not, stop working; S3, the power supply module is connected to the fan drive circuit and the heating core drive circuit, and the corresponding working mode is selected based on the working requirements; S4. Real-time detection of the muzzle temperature of the hot air gun outlet, and adjustment of the fan speed and / or the output power of the heating core based on the first temperature difference and the second temperature difference between the muzzle temperature and the corresponding working mode setting; setting a safety temperature threshold based on the configuration parameters of the heating core, generating a braking signal based on the numerical comparison result between the heating core temperature and the safety temperature threshold, and protecting the hot air gun based on the braking signal.

2. A cordless hot air gun control method according to claim 1, Features: In S1, the battery pack interface parameters are obtained, and it is determined whether the battery pack interface parameters are consistent with the power supply module interface parameters, including the following steps: Acquire battery pack interface parameters, where the battery pack interface parameters include at least operating voltage, operating current, and interface type; If the battery pack can be installed on the hot air gun, it is judged that the battery pack interface parameters are consistent with the power module interface parameters; If the battery pack cannot be installed on the hot air gun, it is judged that the battery pack interface parameters are inconsistent with the power module interface parameters.

3. A cordless hot air gun control method according to claim 1, Features: In S2, the battery pack sends a matching request instruction, and the communication module receives the matching request instruction and parses it to determine whether a match can be made, including the following steps: The battery pack sends a matching request instruction, wherein the matching request instruction includes at least a communication protocol and a communication parameter; If the communication protocol and communication parameters of the battery pack are consistent with the communication protocol and communication parameters of the communication module, it is determined that the communication module can match the battery pack; If the communication protocol and communication parameters of the battery pack are inconsistent with the communication protocol and communication parameters of the communication module, it is determined that the communication module cannot match the battery pack.

4. A cordless hot air gun control method according to claim 1, Features: In S3, the power supply module is connected to the fan drive circuit and the heating core drive circuit, and a corresponding working mode is selected based on working requirements, including the following steps: The power supply module obtains the electric energy of the battery pack and provides power to the fan drive circuit and the heating core drive circuit; Obtain the material and size of the heated object, and determine the work requirements based on the material and size of the heated object; The corresponding working mode is selected based on working requirements, and the working mode at least includes set temperature, fan speed, heating core working power and preheating time.

5. A cordless hot air gun control method according to claim 1, Features: In S4, the muzzle temperature of the hot air gun outlet is detected in real time, and the speed of the fan and / or the output power of the heating core are adjusted based on the muzzle temperature and the first temperature difference and the second temperature difference set for the corresponding working mode, including the following steps: Real-time detection of the muzzle temperature of the hot air gun outlet. After the preheating time of the hot air gun is over, if the difference between the muzzle temperature of the hot air gun and the set temperature is less than or equal to the first temperature difference, the fan auxiliary adjustment mode is selected; If the difference between the muzzle temperature of the hot air gun and the set temperature is greater than the first temperature difference and less than or equal to the second temperature difference, the heating core auxiliary adjustment mode is selected; If the difference between the muzzle temperature of the hot air gun and the set temperature is greater than the second temperature difference, the mixed auxiliary adjustment mode is selected.

6. A cordless hot air gun control method according to claim 5, Features: If the difference between the muzzle temperature of the hot air gun and the set temperature is less than or equal to the first temperature difference, the fan auxiliary adjustment mode is selected, including the following steps: If the muzzle temperature of the hot air gun is lower than the set temperature, and the difference is less than or equal to the first temperature difference, the speed of the fan is increased until the muzzle temperature is equal to the set temperature; If the temperature at the muzzle of the hot air gun is greater than the set temperature, and the difference is less than or equal to the first temperature difference, the speed of the fan is reduced until the muzzle temperature is equal to the set temperature.

7. A cordless hot air gun control method according to claim 5, Features: If the difference between the muzzle temperature of the hot air gun and the set temperature is greater than the first temperature difference and less than or equal to the second temperature difference, the heating core auxiliary adjustment mode is selected, including the following steps: If the muzzle temperature of the hot air gun is lower than the set temperature, and the difference is greater than the first temperature difference and less than or equal to the second temperature difference, the output power of the heating core is increased until the muzzle temperature is equal to the set temperature; If the muzzle temperature of the hot air gun is greater than the set temperature, and the difference is greater than the first temperature difference and less than or equal to the second temperature difference, the output power of the heating core is reduced until the muzzle temperature is equal to the set temperature.

8. A cordless hot air gun control method according to claim 5, Features: If the difference between the muzzle temperature of the hot air gun and the set temperature is greater than the second temperature difference, the mixed auxiliary adjustment mode is selected, including the following steps: If the muzzle temperature of the hot air gun is lower than the set temperature, and the difference is greater than the second temperature difference, the speed of the fan and the output power of the heating core are increased synchronously until the muzzle temperature is equal to the set temperature; If the muzzle temperature of the hot air gun is greater than the set temperature, and the difference is greater than the second temperature difference, the speed of the fan and the output power of the heating core are synchronously reduced until the muzzle temperature is equal to the set temperature.

9. A cordless hot air gun control method according to claim 1, Features: In S4, a safety temperature threshold is set based on the configuration parameters of the heating core, a braking signal is generated based on a numerical comparison result between the output temperature of the heating core and the safety temperature threshold, and the hot air gun is protected based on the braking signal, including the following steps: The corresponding safety temperature threshold is obtained based on the configuration parameters of the heating core. If the temperature of the heating core exceeds the safety temperature threshold, the heating core is disconnected and an alarm signal is sent; If the temperature of the heating core drops below the safe temperature threshold, it will automatically recover.

10. A cordless hot air gun control method according to claim 5, Features: The first temperature difference and the second temperature difference are both positive numbers, and the first temperature difference is smaller than the second temperature difference.

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