Intelligent regulation and control air pump system

Abstract

The invention belongs to the technical field of inflator pumps, and particularly relates to an intelligent regulation and control air pump system, the air pump system realizes air compression through cooperation of a brushless motor and a screw which are arranged, and a main control module calculates theoretical output pressure of a compression module according to obtained target tire pressure and real-time tire pressure data fed back by a pressure detection module; the main control module controls the electronic controller according to the theoretical output pressure, then the rotating speed of the screw is adjusted by controlling the rotating speed of the brushless motor, intelligent control over the air pressure of compressed air by the inflator pump is achieved, the air pump system can reduce the size of the air pump, the air inlet mode of the screw is continuous and is not interrupted, and the air inlet efficiency is improved. According to the air pump, the effects of low noise and large air output can be achieved, efficient, stable and safe operation of the air pump under different working conditions can be guaranteed on the basis of the PID control calculation unit and the multi-stage pressure regulation and optimization technology, the use experience of a user is improved, the service life of equipment is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of air pumps, and in particular relates to an intelligently controlled air pump system. Background Art

[0002] In modern industry and daily life, air pumps are widely used in many scenarios, such as tire inflation, driving pneumatic components in industrial automation equipment, etc. However, traditional air pumps mainly use cylinders and motors to pressurize. Although this method is relatively simple and mature, it has significant shortcomings in practical applications. First, since the working mode of the cylinder is reciprocating motion, sufficient space needs to be reserved for the piston rod to move each time the air is inhaled, which not only increases the overall size of the entire air pump, but also limits its applicability in compact environments, such as portable devices or small household appliances. Secondly, the traditional cylinder drive method can only achieve two states of on / off, that is, either fully compressing the air (providing maximum pressure) or not compressing (no pressure). The lack of a continuously adjustable pressure output function makes it impossible for users to flexibly adjust the output pressure according to specific needs, reducing the adaptability of the equipment and user experience.

[0003] Moreover, due to the reciprocating motion characteristics of the cylinder, the gas output by the air pump has periodic pressure fluctuations. This periodic pressure change causes the air pump to exhibit pulsation during the inflation process, which makes it difficult for the air pump to maintain a constant output pressure. Even if the target pressure value is set, the actual output pressure may fluctuate above and below the set value, resulting in unsatisfactory inflation effect.

[0004] In addition, the mechanical vibrations generated during the operation of the cylinder and the sound of gas quickly entering and exiting the valve will cause a high noise level, which will disturb the user and affect comfort, especially when used in a quiet environment.

[0005] Therefore, an air pump that can both intelligently adjust and stabilize the inflation pressure is needed to solve the above problems. Summary of the invention

[0006] In order to solve the above problems existing in the prior art, the present invention provides an intelligently controlled air pump system to solve the problem that the output gas pressure of the air pump is unstable under the prior art, which affects the subsequent intelligent control of the inflation pressure by the air pump.

[0007] The object of the present invention can be achieved by the following technical solutions: an intelligently controlled air pump system, comprising a main control module and a compression module and a pressure detection module electrically connected to the main control module;

[0008] The pressure detection module is used to detect the tire pressure of the tire and feed it back to the main control module, wherein the tire pressure includes the initial pressure of the tire and the real-time tire pressure during the inflation process;

[0009] The compression module includes a screw, a brushless motor and an electronic controller for controlling the rotation of the brushless motor. The brushless motor is connected to the screw through a shaft connector. The rotation of the motor drives the screw to rotate to compress the gas. The electronic controller is connected to the main control module and is controlled by the main control module.

[0010] The main control module obtains the target tire pressure of the tire, and calculates the theoretical output pressure of the compression module according to the real-time tire pressure data fed back by the pressure detection module. The main control module controls the operation of the electronic controller according to the theoretical output pressure.

[0011] Preferably, it also includes a gas volume detection module, which is controlled by the main control module and feeds back the gas volume detection result to the main control module;

[0012] The gas volume detection module includes an intake gas volume detection unit and an exhaust gas volume measurement unit, and the intake gas volume detection unit and the exhaust gas volume detection unit are respectively used to detect the gas volume Qin flowing into the compression module and the gas volume Qout flowing out of the compression module, and the main control module calculates the theoretical output pressure based on Qin and Qout.

[0013] Preferably, the gas volume detection module further includes an inlet air temperature detection device and an outlet air temperature detection device;

[0014] The inlet temperature detection device is used to detect the temperature Tin of the gas flowing into the compression module, and the outlet temperature detection device is used to detect the temperature Tout of the gas flowing out of the compression module;

[0015] The main control module corrects the theoretical output pressure according to the data uploaded by the intake temperature detection device and the outlet temperature detection device. The corrected theoretical output pressure of the main control module is:

[0016] P repair = P meter × (Q in / Q out) × (T out / T in), P meter is the theoretical output pressure, and the main control module controls the operation of the electronic controller according to the corrected theoretical output pressure.

[0017] Preferably, it also includes a volume detection module for real-time detection of tire volume, the volume detection module is connected to the main control module and feeds back real-time volume data of the tire to it, the main control module is provided with a volume warning threshold, and the main control module issues a warning when the real-time volume data is greater than the volume warning threshold.

[0018] Preferably, the main control module is preset with a PID control unit, and the PID control unit controls the motor controller to adjust the rotation speed of the brushless motor according to the detection value of the corrected air outlet detection unit.

[0019] Preferably, the main control module further includes a judgment unit, and the main control module adjusts the proportional gain value of the PID control unit according to the tire pressure of the tire fed back by the pressure detection module.

[0020] Preferably, it also includes a temperature monitoring module, which is used to monitor the temperature of the compression module. The temperature monitoring module is electrically connected to the main control module and feeds back temperature measurement data to the main control module. The main control module is preset with a temperature threshold. When the temperature measurement data value is greater than the temperature threshold, the main control module controls the operation of the electronic controller.

[0021] Preferably, the compression module further comprises a reduction gearbox, the output shaft of the brushless motor is connected to the input shaft of the reduction gearbox via a coupling, and the output shaft of the reduction gearbox and the input shaft of the screw are synchronously driven and connected.

[0022] The beneficial effects of the present invention are:

[0023] The air pump system of the present invention realizes gas compression through the cooperation of the brushless motor and the screw, wherein the main control module calculates the theoretical output pressure of the compression module according to the acquired target tire pressure and the real-time tire pressure data fed back by the pressure detection module, and controls the operation of the electronic controller according to the theoretical output pressure. The electronic controller realizes the control of the speed of the brushless motor by controlling the magnitude of the current. The speed of the brushless motor controls the speed of the screw. Different screw speeds realize different compressions of the gas in the cavity, and control the pressure of the gas going out of the exhaust port according to the target tire pressure required by the tire, thereby realizing intelligent adjustment according to the pressure requirements of different tires.

[0024] Moreover, the screw rod combined with the brushless motor power mode adopted in this application, in conjunction with the control of the main control module, can realize intelligent adjustment of the output air pressure, which effectively reduces the volume of the air pump compared to the cylinder air intake mode of the traditional technology. At the same time, the air intake mode of the screw rod is continuous, and there is no intermittent mode. In addition, the brushless motor as a power has the effect of low noise and large air output.

[0025] The air pump system is based on PID control unit, multi-stage pressure regulation and optimization technology, which can ensure that the air pump can maintain efficient, stable and safe operation under different working conditions. This intelligent design not only improves the user experience, but also extends the service life of the equipment and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0027] Figure 1 It is a system block diagram of the present invention. DETAILED DESCRIPTION

[0028] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0029] See also Figure 1 This embodiment provides an intelligently controlled air pump system, comprising a main control module, a compression module and a pressure detection module electrically connected to the main control module; the pressure detection module is used to detect the tire pressure of the tire and feed it back to the main control module, the tire pressure includes the initial pressure of the tire and the real-time tire pressure during the inflation process, and the pressure detection module can detect the pressure inside the tire through a pressure detection gauge provided on the air inlet nozzle of the air pump;

[0030] The compression module is composed of a screw, a brushless motor, and an electronic controller that controls the rotation of the brushless motor. It is a modular structure that realizes gas compression according to the control of the main control module. The brushless motor is directly connected to the screw through a coupling or a gearbox, or indirectly connected through a belt drive system. The rotation of the motor drives the screw to rotate to compress the gas. The stator of the brushless motor is composed of multiple electromagnetic coils, and the rotor is composed of permanent magnets. The brushless motor can accurately control the flow of current so that the rotor rotates continuously in the magnetic field generated by the stator. The electronic controller adjusts the speed and torque of the motor in real time to ensure that the air pump can maintain optimal performance under different working conditions.

[0031] Due to the fluctuation of the output air pressure of the piston type air pump, it is difficult for the air pump to maintain a constant output pressure. Even if the target pressure value is set, the actual output pressure may fluctuate above and below the set value, resulting in unsatisfactory inflation effect. Therefore, a screw rod is used in conjunction with a brushless motor to achieve stable control of the output pressure.

[0032] The brushless motor uses a pair of spiral rotors (male and female screws) to compress air. When the two screws mesh with each other and rotate, the air is sucked into the cavity between the screws, and is gradually compressed as the screws rotate, and finally discharged from the exhaust port. Compared with piston compressors, the air is compressed by ensuring that the screws rotate within a limited speed. The output gas is more stable, continuous, almost pulsating, and has low noise, which is conducive to the stability of the gas output from the air pump.

[0033] The brushless motor is directly connected to the screw through a coupling or a gearbox, or indirectly connected through a belt drive system. The rotation of the brushless motor can be transmitted to the screw smoothly and efficiently. Therefore, the electronic controller is connected to the main control module and is controlled by the main control module. The main control module controls the speed of the motor by controlling the electronic controller to achieve control of the speed of the screw, achieve different compression forces on the gas entering the cavity, and achieve control of the pressure of the gas coming out of the exhaust port.

[0034] The target tire pressure can be input by the operator on the air pump, because the vehicle manufacturer usually clearly marks the target tire pressure of the front and rear wheels in the user manual. The target tire pressure is the pressure after the tire is normally inflated. The user can directly input it through the control display of the air pump; the main control module calculates the theoretical output pressure of the compression module based on the acquired target tire pressure and the real-time tire pressure data fed back by the pressure detection module. The main control module controls the operation of the electronic controller according to the theoretical output pressure. The electronic controller controls the speed of the brushless motor by controlling the size of the current. The speed of the brushless motor controls the speed of the screw. Different screw speeds achieve different compression of the gas in the cavity and control the pressure of the gas out of the exhaust port, thereby realizing the intelligent regulation of the air pump on the air pressure of the compressed gas. Of course, the control of the brushless motor speed, the screw speed and the pressure of the converted compressed gas is achieved by the general screw air compressor control method for gas pressure.

[0035] In order to facilitate the calculation of the theoretical output pressure by the main control module, in one embodiment, a gas volume detection module is also included. The gas volume detection module is controlled by the main control module and feeds back the gas volume detection result to it; the gas volume detection module includes an air intake volume detection unit and an air outlet volume measurement unit, and the air intake volume detection unit and the air outlet volume detection unit are respectively used to detect the gas volume Qin flowing into the compression module and the gas volume Qout flowing out of the compression module. The gas volume Qin is the volume of the gas entering the compression module, and the main control module calculates the theoretical output pressure based on Qin and Qout.

[0036] The gas volume detection module uses a high-precision vortex flowmeter to directly measure the air flow entering or flowing out of the compression module. The main control module calculates the theoretical output pressure of the compression module based on the ideal gas state equation and the law of conservation of energy. The gas volume in the formula of the ideal gas state equation here is the detection value of the gas volume detection module.

[0037] Since the density of the gas is greatly affected by temperature, it is necessary to compensate for pressure and temperature during calculation to reduce the influence of temperature on the main control module when calculating the theoretical output pressure. In one embodiment, the gas volume detection module further includes an inlet temperature detection device and an outlet temperature detection device;

[0038] The main control module corrects the theoretical output pressure according to the temperature data uploaded by the intake temperature detection device and the outlet temperature detection device. The corrected theoretical output pressure of the main control module is:

[0039] Pxiu=Pgauge×(Qin / Qout)×(Tout / Tin), where Pgauge is the theoretical output pressure calculated by the aforementioned main control module taking temperature changes into account. The main control module controls the operation of the electronic controller based on the corrected theoretical output pressure.

[0040] Since large truck tires have a large diameter, the diameter of the tire when inflated will be relatively small, and during the subsequent inflation process, the diameter of the tire will continue to increase. Although the pressure detection module detects the tire pressure in real time, as the tire ages or the ambient temperature rises, the volume of the tire changes too much, causing a deviation between the theoretical pressure and the theoretical volume. In order to prevent over-inflation, in one embodiment, a volume detection module for real-time detection of the tire volume is also included. The volume detection module is connected to the main control module and feeds back the real-time volume data of the tire to it. A volume warning threshold is set in the main control module. The main control module issues a warning when the real-time volume data is greater than the volume warning threshold.

[0041] In order to improve the stability and pertinence of the adjustment of the main control module, in one embodiment, the main control module is preset with a PID control unit. The PID control unit controls the motor controller to adjust the speed of the brushless motor according to the detection value of the corrected air outlet detection unit. The PID control unit is a proportional-integral-differential control algorithm, which includes a proportional term (P): it is adjusted according to the ratio between the current correction value and the theoretical value to quickly respond to pressure changes.

[0042] Integral term (I): accumulates historical correction values, eliminates steady-state errors, and ensures long-term stability.

[0043] Derivative term (D): predicts future correction value changes to prevent overshoot and oscillation.

[0044] The PID control unit adjusts the control of the main control module over the electronic controller according to the difference between the corrected theoretical output pressure and the theoretical output pressure to control the speed of the brushless motor, making the control of the main control module more stable, thereby achieving stable output pressure.

[0045] In one embodiment, the main control module also includes a judgment unit. The main control module adjusts the proportional gain value of the PID control unit according to the tire pressure fed back by the pressure detection module. Determining the proportional gain is one of the key steps in tuning the PID control unit. The proportional gain determines the sensitivity of the controller to the difference between the correction value and the theoretical value, and directly affects the response speed and stability of the system. To ensure the stability and efficiency of the inflation process, in order to ensure that the system can maintain optimal performance under different working conditions,

[0046] When the initial tire pressure is low, the system can increase the proportional gain appropriately to speed up the inflation speed to ensure that the system can respond quickly. When the tire pressure fed back by the pressure detection module is close to the target pressure: the system should gradually reduce the proportional gain to prevent overshoot and ensure a smoother system response.

[0047] In one embodiment, a temperature monitoring module is also included. The temperature monitoring module is used to monitor the temperature of the compression module. The temperature monitoring module is electrically connected to the main control module and feeds back temperature measurement data to the main control module. The main control module is preset with a temperature threshold. When the temperature measurement data value is greater than the temperature threshold, the main control module controls the operation of the electronic controller.

[0048] In one embodiment, the compression module further includes a reduction gearbox, the output shaft of the brushless motor is connected to the input shaft of the reduction gearbox through a coupling, and the output shaft of the reduction gearbox and the input shaft of the screw are synchronously driven to meet the different compression requirements of the main control module. The reduction gearbox can also increase the torque output of the system to ensure that the screw can generate sufficient compression force even at low speed.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An intelligently controlled air pump system, characterized in that: It includes a main control module, a compression module and a pressure detection module electrically connected to the main control module; The pressure detection module is used to detect the tire pressure of the tire and feed it back to the main control module, wherein the tire pressure includes the initial pressure of the tire and the real-time tire pressure during the inflation process; The compression module includes a screw, a brushless motor and an electronic controller for controlling the rotation of the brushless motor. The brushless motor is connected to the screw through a shaft connector. The rotation of the motor drives the screw to rotate to compress the gas. The electronic controller is connected to the main control module and is controlled by the main control module. The main control module obtains the target tire pressure of the tire, and calculates the theoretical output pressure of the compression module according to the real-time tire pressure data fed back by the pressure detection module. The main control module controls the operation of the electronic controller according to the theoretical output pressure.

2. The intelligently controlled air pump system according to claim 1, characterized in that: It also includes a gas volume detection module, which is controlled by the main control module and feeds back the gas volume detection result to the main control module; The gas volume detection module includes an intake gas volume detection unit and an exhaust gas volume measurement unit, and the intake gas volume detection unit and the exhaust gas volume detection unit are respectively used to detect the gas volume Qin flowing into the compression module and the gas volume Qout flowing out of the compression module, and the main control module calculates the theoretical output pressure based on Qin and Qout.

3. The intelligently controlled air pump system according to claim 2, characterized in that: The gas volume detection module also includes an inlet air temperature detection device and an outlet air temperature detection device; The inlet temperature detection device is used to detect the temperature Tin of the gas flowing into the compression module, and the outlet temperature detection device is used to detect the temperature Tout of the gas flowing out of the compression module; The main control module corrects the theoretical output pressure according to the data uploaded by the intake temperature detection device and the outlet temperature detection device. The corrected theoretical output pressure of the main control module is: P repair = P meter × (Q in / Q out) × (T out / T in), P meter is the theoretical output pressure, and the main control module controls the operation of the electronic controller according to the corrected theoretical output pressure.

4. The intelligently controlled air pump system according to claim 3, characterized in that: It also includes a volume detection module for real-time detection of tire volume. The volume detection module is connected to the main control module and feeds back the real-time volume data of the tire to it. The main control module is provided with a volume warning threshold. The main control module issues a warning when the real-time volume data is greater than the volume warning threshold.

5. The intelligently controlled air pump system according to claim 3, characterized in that: The main control module is preset with a PID control unit, and the PID control unit controls the motor controller to adjust the rotation speed of the brushless motor according to the detection value of the corrected air outlet detection unit.

6. The intelligently controlled air pump system according to claim 4, characterized in that: The main control module further includes a judgment unit, and the main control module adjusts the proportional gain value of the PID control unit according to the tire pressure of the tire fed back by the pressure detection module.

7. The intelligently controlled air pump system according to claim 4, characterized in that: It also includes a temperature monitoring module, which is used to monitor the temperature of the compression module. The temperature monitoring module is electrically connected to the main control module and feeds back temperature measurement data to the main control module. The main control module is preset with a temperature threshold. When the value of the temperature measurement data is greater than the temperature threshold, the main control module controls the operation of the electronic controller.

8. The intelligently controlled air pump system according to claim 1, characterized in that: The compression module also includes a reduction gearbox, the output shaft of the brushless motor is connected to the input shaft of the reduction gearbox through a coupling, and the output shaft of the reduction gearbox and the input shaft of the screw are synchronously driven and connected.

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