Multi-zone controlled glass precision tempering method and apparatus

Abstract

The application relates to a multi-region controlled glass precision tempering method and equipment, belonging to the technical field of glass tempering, wherein the blowing region of glass tempering is divided into multiple blowing units along the horizontal direction and the vertical direction, each blowing unit is provided with an independent fan, the position of glass in the blowing region is estimated according to the glass size and the glass conveying parameters, the blowing unit covering the glass is opened and the blowing unit not covering the glass is closed along with the movement of the glass, energy waste caused by the overall blowing is avoided, the purpose of energy saving and consumption reduction is achieved, the sensor arranged in the blowing unit is used to detect the glass tempering process data, the fan of each blowing unit is respectively regulated and controlled according to the region of the blowing unit covering the glass and the preset tempering process parameters, the blowing parameters of each region of the glass are matched in different cooling stages, the quenching rate of each part of the glass is matched, and the quality of the tempered glass is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to glass tempering technology, in particular to a multi-region control glass precision tempering method and equipment. BACKGROUND

[0002] With the more and more widely application of tempered glass in society, people's quality requirements for tempered glass are also higher and higher. At present, glass tempering is mostly adopted by the way of whole blowing of air grid, whether it is the tempering of flat glass or the tempering of curved glass, the whole blowing quenching tempering method is adopted. This method adopts the method of large wind flooding, which often accompanies a large amount of energy waste. Moreover, since the cooling rate of the center and the edge of the glass is not the same in the process of tempering, the whole blowing method cannot adjust the blowing air pressure, air volume and other places separately, and cannot match the quenching rate of each part of the glass, which easily causes the large deviation of stress value of the glass after tempering, increases the self-explosion probability of the tempered glass. The large stress difference also easily causes the large deviation of the geometric size of the glass, reduces the quality of the tempered glass. In addition, the process of tempered glass production is often not full production, but the traditional tempering method must be whole blowing, which causes a large amount of energy waste.

[0003] At present, the tempering equipment mostly adopts large fan to provide the cooling air required for glass tempering, each large fan controls several meters long blowing area, since the air path is long, when the fan frequency is adjusted, the terminal air pressure has serious time lag, which cannot be adjusted in real time, and has influence on the quality of the tempered glass. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the defects of energy waste caused by whole blowing and the inability to accurately control the blowing parameters of each region of the glass, and to provide a multi-region control glass precision tempering method and equipment.

[0005] The technical scheme adopted by the present application to solve the above technical problem is: a multi-region control glass precision tempering method, characterized in that: the blowing area of glass tempering is divided into a plurality of blowing units along the horizontal and vertical directions, and each blowing unit is provided with an independent fan.

[0006] The heated glass is sent into the blowing area of glass tempering, the position of the glass in the blowing area is estimated according to the glass size and glass conveying parameters, and the blowing unit covering the glass is opened and the blowing unit not covering the glass is closed with the movement of the glass.

[0007] The sensor provided on the blowing unit detects the glass tempering process data of the blowing unit, and the fans of each blowing unit are respectively adjusted according to the area of the blowing unit covering the glass and the preset tempering process parameters, so that each region of the glass has matching blowing parameters.

[0008] Further, the temperature sensor arranged in the blowing unit detects temperature data to determine the cooling stage of the glass, and controls the fan of each blowing unit to make the blowing unit have blowing parameters matched with the cooling stage.

[0009] Further, the steeling process parameters of different cooling stages of the glass are preset according to the data information of the glass, the temperature sensor arranged in the blowing unit detects the ambient temperature, and the detected ambient temperature is compared with the preset gradient target temperature threshold value, and the fan frequency is reduced with the gradient of the ambient temperature.

[0010] Further, the blowing effective coefficient of the blowing unit is set according to the area of the glass covered by the blowing unit, the blowing effective coefficient of the blowing unit whose covered area completely coincides with the glass is set to 1, and the blowing effective coefficient of the blowing unit whose covered area does not completely coincide with the glass is set to the ratio of the area of the glass covered by the blowing unit to the covered area of the blowing unit.

[0011] Further, the position of the glass in the blowing area is estimated according to the size of the glass and the glass conveying parameters, and each blowing unit is controlled in advance according to the estimated position of the glass in the next 3-5 seconds.

[0012] Further, the target wind pressure of the glass steeling is preset according to the cooling stage of the glass, the actual wind pressure is detected by the sensor of the blowing unit, the fan frequency is adjusted according to the wind pressure error and the error change rate, and the formula is:

[0013]

[0014] wherein, is the fan frequency, is the sampling period, is the wind pressure error, is the error change rate, is the proportional gain, is the integral gain, is the differential gain.

[0015] Further, when the blowing amount required by the blowing unit is greater than the maximum air supply amount of the fan in the blowing unit, the blowing unit and the adjacent blowing unit not covering the glass are connected in series by a pipeline, the air outlet of the blowing unit not covering the glass is closed, and the airflow of the fan is introduced into the connected blowing unit through the pipeline to increase the blowing amount.

[0016] A multi-zone controlled glass precision steeling device, comprising a glass steeling section for receiving heated glass and blowing the glass, and a blowing assembly arranged above and below the glass conveying unit of the glass steeling section.

[0017] In the glass toughening section, the upper and lower blowing assemblies are divided into a plurality of blowing units in the transverse and longitudinal directions, and each blowing unit is provided with an independent fan.

[0018] The glass conveying unit is provided with a speed detection element for detecting the glass conveying speed to determine the glass position, and each blowing unit is provided with a sensor for detecting the glass toughening process data.

[0019] The control system of the glass toughening equipment can control the opening and closing of each blowing unit according to the position of the glass, so that the blowing unit covering the glass is turned on and the blowing unit not covering the glass is turned off, and can control the fan of each blowing unit according to the detected glass toughening process data and the preset toughening process parameters to adjust the blowing parameters of the blowing unit covering different areas of the glass.

[0020] Each blowing unit is provided with a blowing valve connected between the fan and the air outlet, and the blowing valve is used to control whether the air outlet of the blowing unit blows air.

[0021] The series pipelines are connected between different blowing units, and the control valve is arranged on the series pipeline, and the series pipeline is used to introduce the fan airflow of the blowing unit not needing blowing into the blowing unit connected in series to increase the blowing amount.

[0022] The beneficial effects of the present application are: the blowing area of the glass toughening is divided into a plurality of blowing units in the transverse and longitudinal directions, and each blowing unit is provided with an independent fan. Each blowing unit is independently controlled, and the opening and closing of the blowing unit is dynamically adjusted according to the position of the glass in the blowing area, so as to avoid energy waste caused by overall blowing and achieve the purpose of energy saving and consumption reduction. And each blowing unit is provided with a sensor for detecting the glass toughening process data, and each blowing unit is adjusted and controlled according to the detection data, the area of the glass covered by the blowing unit and the set toughening process parameters of each area of the glass, so that each area of the glass has accurately adjusted blowing parameters, so as to match the quenching rate of each part of the glass and improve the quality of the toughened glass.

[0023] Further, different blowing units can be connected in series, and when the fan in one blowing unit cannot meet the blowing amount requirement, air can be introduced from other blowing units to increase the blowing amount, so as to meet the demand of ultra-thin glass toughening and the like. While a plurality of blowing units are independently controlled, they can also be connected in series. The defects of traditional large fans supporting complex air paths occupying valuable production sites can be avoided, and the construction of fan platforms can also save a lot of manpower and material resources. The equipment structure is compact, and the intelligent degree is high, which can greatly save manpower and material resources. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic diagram of the distribution of the blowing unit in the glass toughening blowing area of the present application.

[0025] Figure 2 is the connection diagram of each blowing unit and control system of the present application.

[0026] Figure 3 is the control principle diagram of the control system of the present application.

[0027] Figure 4 is the embodiment diagram of the present application according to the regulation of the glass area of the blowing unit.

[0028] Figure 5 is the embodiment diagram of the present application according to the regulation of the loading area of the blowing unit.

[0029] Figure 6 is the embodiment diagram of the tempered ultra-thin glass of the present application.

[0030] Figure 7 is the embodiment diagram of the present application of simultaneously tempering glass with different thicknesses.

[0031] Marked in the figure: 1, blowing area, 2, blowing unit, 201, blowing valve, 202, fan, 203, sensor, 3, series pipeline, 301, control valve, 4, glass, 5, ultra-thin glass, 6, thick plate glass, 7, thin plate glass. DETAILED DESCRIPTION

[0032] The technical solutions of the present application are clearly and completely explained in combination with the drawings and specific embodiments. The specific contents listed in the following embodiments are not limited to the technical features necessary for the technical problems to be solved by the technical solutions recited in the claims. At the same time, the listed examples are only a part of the present application, not all the embodiments.

[0033] As shown in Figure 1 the present application divides the glass tempering blowing area 1 into multiple blowing units 2 in the transverse and longitudinal directions, Figure 1 In the embodiment, the left-right direction is the transverse direction, i.e. the glass conveying direction, and 6 blowing units are divided, and the up-down direction in the figure is the longitudinal direction, i.e. the glass conveying path width direction, and 4 blowing units are divided, and the actual number is divided according to the needs. Each blowing unit has an air outlet facing the glass, and a fan 202 for supplying air to the air outlet. The fan 202 of each blowing unit is independently provided and can be individually controlled. Each blowing unit 2 is provided with a blowing valve 201 for controlling the on-off of the air path between the fan 202 and the air outlet.

[0034] The blowing area 1 is provided in the glass tempering section of the glass tempering equipment, and the glass tempering section is connected after the glass heating equipment for receiving the heated glass and blowing. The blowing assembly is provided above and below the glass conveying unit of the glass tempering section, and the blowing assemblies above and below areFigure 1 The blowing units 2 are divided in the illustrated manner.

[0035] As Figure 2 illustrated, the electrical elements in each blowing unit are connected to the control system and are controlled by the control system. The process parameters for glass tempering can be preset in the control system, and the control system controls the operation of each blowing unit 2 according to the preset process parameters and the real-time state of the glass. In an embodiment of the present application, a plurality of glass tempering process parameters are preset in the control system, and before glass tempering, information of the glass to be processed, such as glass size, glass thickness, loading rate, whether it is coated glass and film layer information, etc., is input into the control system, and the control system sets the appropriate tempering process parameters according to the glass information. Sensors can be provided in the blowing units in the glass tempering section to obtain environmental parameters such as temperature, humidity, and air pressure, which are fed back to the control system for secondary correction of related tempering process parameters.

[0036] In the glass tempering method of the present application, the heated glass is sent to the blowing area for glass tempering, and the glass is moved in the blowing area by the glass conveying unit according to the set mode, for example, the glass is tempered by blowing in a reciprocating manner in the blowing area. The control system estimates the position of the glass in the blowing area according to the size of the glass and the conveying parameters of the glass, and determines the blowing units covering the upper and lower surfaces of the glass at any time. As the glass moves in the blowing area, the control system controls the opening or closing of each blowing unit according to the position of the glass, so that the blowing area of the blowing unit matches the area where the glass is located, that is, the blowing units covering the glass are opened and the blowing units not covering the glass are closed.

[0037] The position of the glass can be determined according to the size of the glass and the speed of the reciprocating conveying of the glass on the conveying unit. The size of the glass is input into the control system before tempering, and the speed of the reciprocating conveying of the glass on the conveying unit can be determined by a speed detection element provided on the glass conveying unit, for example, the glass conveying unit uses a conveying roller, and the speed detection element uses an encoder provided on the driving mechanism of the conveying roller to calculate the conveying speed according to the detection data of the encoder and the parameters of the conveying roller. The position of the front end of the glass in the blowing area can be determined according to the time when the glass enters the blowing area and the conveying speed, and the position of the rear end of the glass in the blowing area can be further determined according to the size of the glass, and then the coverage of the blowing units to the glass can be determined. The specific way of detecting the speed and position of the glass can be set as needed, which is not limited to the above embodiment.

[0038] Each blowing unit 2 is provided with sensors 203 for detecting glass tempering process data, such as temperature sensors, humidity sensors, air pressure sensors, etc. The actual tempering process data of the blowing unit is detected in real time by the sensors provided on the blowing unit, and each blowing unit and its fan are controlled according to the area of the glass covered by the blowing unit and the preset tempering process parameters.

[0039] The control of the blowing unit and its fan includes several aspects:

[0040] 1. Blowing unit on-off control: As described above, the blowing unit is dynamically controlled to be turned on or off according to the area where the glass is located. When the glass enters a blowing unit, the fan 202 of the blowing unit is turned on, and when the glass leaves a blowing unit, the fan of the blowing unit is turned off, so as to avoid blowing in the area without glass and wasting energy.

[0041] For example Figure 5 In the embodiment shown, the glass with a small loading area in the blowing area will not be covered by the blowing units on both sides of the conveying direction, and the blowing units can be turned off. The symbol "on" in the figure indicates that the blowing valve of the blowing unit is in the open state, and the symbol "off" in the figure indicates that the blowing valve of the blowing unit is in the closed state. In actual production, the loading rate is often low. For the existing tempering method, the blowing area cannot be adjusted, but the method of the present application can match the effective blowing area with the actual loading area by turning off the blowing units above the glass that is not loaded. As the glass moves, when the blowing units in the front and rear directions of the glass also cannot cover the glass, the blowing units can also be turned off. In order to facilitate dynamic control, for the blowing units at both ends of the swinging direction of the glass, the fan of the blowing unit can be adjusted to the lowest frequency as the closing mode of the blowing unit, so as to respond in time when the blowing unit needs to be turned on again.

[0042] 2. Blowing unit blowing effective coefficient control: The blowing effective coefficient is set according to the blowing unit covering the glass. The value of the coefficient ranges from 0 to 1. The blowing effective coefficient of the blowing unit that does not cover the glass is 0. The blowing effective coefficient of the blowing unit that covers the glass completely is 1, which corresponds to the middle area of the glass. The blowing effective coefficient of the blowing unit that covers the glass incompletely is The ratio of the glass area under the blowing unit coverage area S G to the blowing unit coverage area S Q. The fan operating frequency is adjusted according to the blowing effective coefficient, for example, the blowing effective coefficient f(s) of a blowing unit is 0.7, and the original fan frequency set for the cooling stage is S, then the fan frequency of the blowing unit is adjusted to 0.7xS. Since the glass is reciprocating, the blowing effective coefficient of the blowing unit changes in real time according to the detected glass position, and the fan frequency is adjusted accordingly, realizing uniform cooling of each area of the glass.

[0043] For example Figure 4 In the embodiment shown, the blowing area is a single large piece of glass 4, and the blowing units around the glass only cover the edge area of the glass. Since the edge glass cools faster and the edge exhaust is smoother, the tempering parameters of the edge blowing units can be appropriately reduced, i.e. the wind pressure of the edge blowing units is reduced. The center area glass cools slower, so the tempering parameters can be appropriately increased, i.e. the wind pressure of the center area blowing units is increased. The symbol "+" in the figure represents higher wind pressure or larger air volume, and the symbol "-" in the figure represents lower wind pressure or smaller air volume. When the blowing area is a plurality of pieces of glass with high loading rate and the same thickness, the plurality of pieces of glass arranged in a substantially continuous manner can be regarded as a single large piece of glass, and the wind pressure of the edge and center area can be adjusted in the above manner. In this way, the cooling rate of the glass at all positions tends to be consistent, ensuring the consistency of the stress of the tempered glass, weakening the geometric size deformation of the glass caused by uneven stress, improving the quality of the tempered glass, and effectively reducing the self-explosion rate of the tempered glass.

[0044] 3. Staged Control of the Blowing Unit: When the glass first exits the heating furnace and enters the air grid, its temperature is at its highest (close to the softening point). At this time, extremely high cooling intensity (large air volume, high air pressure) is required to quickly establish a surface compressive stress layer. As the glass circulates and gradually cools in the air grid, its surface temperature drops rapidly. Maintaining the highest air pressure would consume enormous energy and could even cause potential uneven cooling. Therefore, as the glass temperature decreases, the fan frequency should gradually decrease according to a preset gradient. This invention sets temperature sensors in each blowing unit and controls the blowing unit in stages based on the difference between the ambient temperature and the tempering temperature. The tempering process parameters of the glass are preset based on data such as the glass thickness, and different tempering process parameters and blowing control strategies are set for different cooling stages. The control function is a gradient pressure reduction control 𝑓(𝑇) based on the ambient temperature T. When the glass first exits the heating furnace and enters the tempering section, the fan uses high-frequency, high-pressure rapid tempering blowing. As the tempering process progresses, the glass temperature gradually decreases. The system compares the ambient temperature detected by the temperature sensor with the preset gradient target temperature threshold to determine the cooling stage of the glass. It then selects the fan frequency corresponding to the preset gradient target temperature and adjusts the air pressure of the blowing unit so that each area of ​​the glass has matching blowing parameters at different cooling stages.

[0045] 4. Real-time air pressure control of the blower unit: The actual air pressure PV of the blower unit is detected by the air pressure sensor installed in the blower unit, and the air pressure of each blower unit is adjusted in real time according to the set target air pressure PS. The formula for adjusting the fan frequency is:

[0046]

[0047] in, For the frequency of the fan, The sampling period is For wind pressure error, The rate of change of error, For proportional gain, For integral gain, This is the differential gain.

[0048] The target air pressure PS is set according to the process parameters of the preset glass cooling stage and the coverage of the glass by the air blowing unit, as described above. As a proportional gain, it can quickly increase the wind pressure when the actual wind pressure is low; As an integral gain, it accumulates the errors that have occurred, so that the actual wind pressure can smoothly reach the set target wind pressure value; As a differential gain, it prevents wind pressure overshoot or oscillation in advance when the actual wind pressure is close to the set target wind pressure. , , Selectively adjust according to the range set in the control system.

[0049] 5. Position prediction compensation control: In the above regulation method, different control strategies are used for different blowing units according to the position of the glass. When corresponding regulation is performed, the position of the glass can be predicted in advance, for example, the current position of the glass based on the encoder feedback is , the running speed of the glass is , and the coordinate system of the direction of the glass can be established as , where t is time. According to the formula and the size of the glass, the position of the glass in the blowing area is estimated, for example, the position of the glass in the next 3-5 seconds is estimated to determine the situation of the glass covered by each blowing unit, and the fan frequency of each blowing unit is adjusted in advance to compensate for the thermal inertia delay.

[0050] According to the present application, the fan of each blowing unit is accurately controlled according to the area of the glass in the blowing area, so that the blowing parameters of the blowing unit are matched with the corresponding area of the glass and the cooling stage, thereby matching the quenching rate of each part of the glass and improving the quality of the tempered glass.

[0051] Figure 3The control principle schematic diagram of the control system of the present application is shown. The control system adopts a computer and a PLC module group. The computer is used as a man-machine interface. It displays the state of the equipment and related data in real time and can also set parameters for the PLC module group. The computer sets the processing parameters according to the basic information of the glass to be processed and sends the parameters to the frequency converter group and the control valve group through the PLC module group to control the blowing units. The frequency converter group controls the operating frequency of the blowers of the blowing units, and the control valve group controls the connection or shutdown of the related air paths of the blowing units. The front-end data obtained by the computer includes the main information such as the glass specification, the glass type, and the loading rate. According to the information, the tempering parameters and the effective blowing area are preliminarily matched. The control system can also correct the tempering parameters according to the current environmental parameters including the temperature and the humidity. After the glass is heated in the heating furnace, it enters the blowing area of the tempering section. During this process, the computer obtains the actual air pressure through the air pressure sensor and adjusts the air pressure through PID adjustment according to the set air pressure value. At the same time, the real-time position of the glass is obtained through the position encoder on the equipment side. Combined with the mechanical structure layout of the blowing units, the working coefficient of each blowing unit can be analyzed through the blowing control unit of the computer, and the air pressure requirement of each blowing unit in the next 3-5 seconds can be predicted. Through the temperature sensor on the equipment side, the computer can obtain the real-time environmental temperature of each blowing unit. By comparing the difference between the tempering requirement temperature and the environmental temperature through the blowing control unit, the execution frequency of the blowing unit can be further corrected. The high-speed counting module receives the encoder pulse number to calculate the position of the glass. The digital quantity module inputs 0 / 1 state to determine whether the sensor is triggered. The execution frequency of each blower corrected by the computer is sent to the frequency converter group through the analog output module in the PLC module group, and the on-off of the control valve group is controlled through the digital output module. Each blowing unit executes the action according to the output frequency of the frequency converter and the on-off state of the control valve.

[0052] As Figure 7 shown in the embodiment, two kinds of glass with different thicknesses are loaded in the blowing area, i.e. thick plate glass 6 and thin plate glass 7 placed side by side. The control system sets different tempering parameters for the two kinds of glass due to the different thickness parameters. The symbol "low pressure" in the figure represents the reduction of the air pressure of a specific blowing unit, and the symbol "high pressure" represents the increase of the air pressure of a specific blowing unit. The present application adjusts the blowing parameters of each blowing unit separately, which can adjust the tempering parameters of each blowing unit in the specified area to match the thickness of the glass and meet the tempering requirements of glass with different thicknesses at the same time.

[0053] As Figure 6In the illustrated embodiment, the blowing area contains ultra-thin glass 5 that needs to be tempered. Tempering ultra-thin glass requires significant air pressure and volume. Conventional methods use high-power fans, with sufficient fan capacity designed in advance. However, this invention uses a method where each blowing unit is equipped with a small-power fan, and the fan power of each blowing unit only needs to meet the tempering requirements of glass of conventional thickness. Figure 1 As shown, each blower unit 2 is equipped with a blower valve 201, which is connected to the air path between the blower 202 and the air outlet. The blower valve 201 controls whether air is blown from the air outlet of the blower unit. Different blower units are connected by series pipes 3, for example... Figure 1 In the illustrated embodiment, adjacent air-blowing units are connected via a series pipeline 3, and the series pipeline 3 is equipped with a control valve 301 to control its connection or disconnection. When the required air volume of an air-blowing unit exceeds the maximum air supply volume of the fan in that unit, it can be adjusted as follows: Figure 6 As shown, the air outlet of the blower unit that does not cover the glass is closed, and the airflow from its fan is introduced into the blower unit that requires a large air volume through the series pipe 3. The symbol "series" in the figure indicates that the side fan and the middle fan are connected in series, and the symbol "+" in the figure indicates high air pressure and large air volume. Figure 1 In this embodiment, adjacent air-blowing units are connected in series. It is foreseeable that connecting non-adjacent air-blowing units in series via suitable piping is also an option, depending on requirements. This invention achieves precise control of the small fans in each air-blowing unit while simultaneously enabling centralized, high-volume air supply through the coordinated operation of multiple units. This allows for ultra-high pressure and ultra-large air volume in specific areas, enabling the tempering of ultra-thin glass. This method avoids the drawback of traditional tempering methods requiring the upgrading of large fans when producing ultra-thin glass, effectively reducing customer operating costs.

[0054] This invention divides the blowing area into multiple blowing units both horizontally and vertically. Each blowing unit is precisely and efficiently controlled according to the glass's position, allowing each unit to match the tempering rate of its corresponding glass area. Furthermore, the process parameters of the blowing units are adjusted based on real-time tempering data, achieving precise zoned tempering. Moreover, the multi-zone controlled glass tempering equipment of this invention uses independently configured small blowing units arranged in a combination. This eliminates the drawbacks of traditional large fans with complex airflow paths occupying valuable production space, and avoids the significant manpower and material costs associated with building fan platforms. The equipment has a compact structure, a high degree of intelligence, and can greatly save manpower and resources.

[0055] The above description of specific implementation is only used to help understand the technical concept of the present application and its core idea. Although the technical solutions are described and illustrated by using specific preferred embodiments in the present application, it should not be understood as a limitation on the present application itself. Those skilled in the art can make various changes in form and details without departing from the technical concept of the present application. These easily thought changes or replacements should be covered within the protection scope of the present application.

Claims

1. A method of precision tempering of glass in a multi-zone controlled manner, characterized in that: The glass blowing area of the glass tempering is divided into a plurality of blowing units in the transverse and longitudinal directions, and each blowing unit is provided with an independent fan; The heated glass is sent into the glass blowing area of the glass tempering, the position of the glass in the blowing area is estimated according to the size of the glass and the glass conveying parameters, and the blowing units covering the glass are opened and the blowing units not covering the glass are closed as the glass moves; The actual glass tempering process data of the blowing unit is detected by the sensor arranged in the blowing unit, and the fan of each blowing unit is controlled according to the area of the blowing unit covering the glass and the preset tempering process parameters, so that each area of the glass has matching blowing parameters; The blowing effective coefficient of the blowing unit is set according to the area of the blowing unit covering the glass, the blowing effective coefficient of the blowing unit covering the glass completely is set as 1, the blowing effective coefficient of the blowing unit not covering the glass completely is set as the ratio of the area of the blowing unit covering the glass to the area of the blowing unit, and the running frequency of the fan is adjusted according to the blowing effective coefficient.

2. A method of multi-zone controlled precision toughening of glass as claimed in claim 1, wherein: The temperature data is detected by the temperature sensor arranged in the blowing unit to determine the cooling stage of the glass, and the fan of each blowing unit is controlled so that the blowing unit has blowing parameters matching the cooling stage.

3. A method of multi-zone controlled precision toughening of glass according to claim 2, characterized in that: The tempering process parameters of different cooling stages of the glass are preset according to the data information of the glass, the ambient temperature is detected by the temperature sensor arranged in the blowing unit, the detected ambient temperature is compared with the preset gradient target temperature threshold, and the frequency of the fan is reduced as the gradient of the ambient temperature decreases.

4. The method of claim 1, wherein the glass is a multi-zone controlled glass precision tempering method, characterized in that: The position of the glass in the blowing area is estimated according to the size of the glass and the glass conveying parameters, and each blowing unit is controlled in advance according to the estimated position of the glass in the next 3-5 seconds.

5. A method of multi-zone controlled precision toughening of glass as claimed in claim 1, wherein: The target wind pressure of the glass tempering is preset according to the cooling stage of the glass, the actual wind pressure is detected by the sensor of the blowing unit, the wind pressure is dynamically and real-timely adjusted online by PID adjustment, the frequency of the fan is adjusted according to the wind pressure error and the error change rate, and the formula is: wherein, is the fan frequency, is the sampling period, is the wind pressure error, is the error rate of change, is the proportional gain, is the integral gain, is the derivative gain.

6. A method of multi-zone controlled precision toughening of glass as claimed in claim 1, wherein: When the blowing amount required by the blowing unit is greater than the maximum air supply amount of the fan in the blowing unit, the blowing unit and the adjacent blowing unit not covering the glass are connected in series by a pipeline, the air outlet of the blowing unit not covering the glass is closed, and the airflow of the fan is introduced into the connected blowing unit through the pipeline, so as to increase the blowing amount. 7.A glass precision tempering equipment with multi-zone control, comprising a glass tempering section for receiving heated glass and blowing the glass, and blowing assemblies arranged above and below the glass conveying unit of the glass tempering section, characterized in that: In the blowing area (1) of the glass tempering section, the blowing assemblies above and below are divided into a plurality of blowing units (2) in the transverse and longitudinal directions, and each blowing unit is provided with an independent fan (202); The glass conveying unit is provided with a speed detection element for detecting the conveying speed of the glass to determine the position of the glass, and each blowing unit (2) is provided with a sensor (203) for detecting the actual glass tempering process data; The control system of the glass toughening equipment can control the opening and closing of each blowing unit according to the position of the glass, so that the blowing unit covering the glass is opened and the blowing unit not covering the glass is closed, and can control the fan of each blowing unit according to the detected glass toughening process data and the preset toughening process parameters to adjust the blowing parameters of the blowing unit covering different areas of the glass; the blowing effective coefficient of the blowing unit is set according to the area of the blowing unit covering the glass, the blowing effective coefficient of the blowing unit covering the area completely coinciding with the glass is set as 1, the blowing effective coefficient of the blowing unit covering the area not completely coinciding with the glass is set as the ratio of the area of the blowing unit covering the glass to the covering area of the blowing unit; the running frequency of the fan is adjusted according to the blowing effective coefficient.

8. A multi-zone controlled glass precision tempering apparatus as claimed in claim 7, characterized in that: Each blowing unit (2) is provided with a blowing valve (201) connected with the fan (202) and the air outlet, and the blowing valve (201) is used to control whether the air outlet of the blowing unit blows air.

9. A multi-zone controlled glass precision tempering apparatus as claimed in claim 8, characterized in that: The series pipeline (3) is connected between different blowing units, the control valve (301) is arranged on the series pipeline (3), and the series pipeline (3) is used to introduce the air flow of the fan of the blowing unit not needing to blow air into the blowing unit in series to increase the blowing amount.

Images