Calendering roll unit of paper calender and paper calender

Abstract

This invention discloses a calendering roller unit and a paper calender, relating to the field of paper calendering technology. It includes a guide roller with a humidity detection matrix at its bottom and a humidity regulating roller at its top. The humidity regulating roller also has a humidity calibration matrix at its top. The humidity detection matrix and humidity calibration matrix divide the paper into several measurement units. The humidity detection matrix is ​​used to obtain the initial humidity data of the measurement units, and the humidity calibration matrix is ​​used to obtain the measured humidity data of the measurement units. A control module is mounted on the humidity regulating roller to control the humidity regulation data. This ensures that the humidity of the measurement units on the paper is highly consistent when they enter the calendering operation between the upper and lower calendering rollers, resulting in high-quality and highly consistent paper after calendering.

Description

Technical Field

[0001] This invention relates to the field of paper calendering technology, specifically to the calendering roller unit of a paper calendering machine and the paper calendering machine itself. Background Technology

[0002] A paper calender is a device used to apply pressure and heat to paper, cardboard or similar materials to achieve a flat and smooth effect. The humidity of the paper affects the calendering effect of the paper calender. If the humidity of the paper is controlled within a certain range, paper with a good calendering effect can be obtained.

[0003] Existing paper calenders, such as the slide and supercalender disclosed in Chinese Patent No. CN105544278B and the heating device of a paper calender disclosed in Chinese Patent No. CN102251430B, all involve wetting the paper before it enters the calendering rollers for calendering. However, the internal humidity of the wetted paper is not uniform, resulting in inconsistent calendering effects and affecting the stability of the paper. Summary of the Invention

[0004] In order to overcome the above-mentioned technical problems, the present invention aims to provide a calendering roller unit and a paper calendering machine to solve the problem in the prior art that the uneven humidity inside the paper during the wetting process leads to inconsistent calendering effects when the paper is calendered.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] Specifically, a calendering roller unit for a paper calendering machine is provided, including a guide roller with a humidity detection matrix at its bottom and a humidity regulating roller at its top. The humidity regulating roller also has a humidity calibration matrix at its top. The humidity detection matrix and humidity calibration matrix divide the paper into several measurement units. The humidity detection matrix is ​​used to obtain the initial humidity data for each measurement unit, and the humidity calibration matrix is ​​used to obtain the measured humidity data for each measurement unit. A control module is mounted on the humidity regulating roller. The control module controls the humidity regulation data of the humidity regulating roller. Based on the humidity regulation data and the difference between the initial humidity data and the measured humidity data, the control module uses a computer regression algorithm to establish a humidity control model. The humidity detection matrix transmits the initial humidity data to the control module. Preset humidity data is input into the control module. Based on the difference between the initial humidity data and the preset humidity data, the control module uses the humidity control model to predict the humidity regulation data of the humidity regulating roller. The humidity regulation data includes humidification data and heating data.

[0007] As a further aspect of the present invention: an upper pressure roller and a lower pressure roller are provided on one side of the humidity regulating roller.

[0008] As a further aspect of the present invention: the humidity regulating roller includes a control roller body, and a plurality of humidity regulating plates are provided on the side of the control roller body, the area of ​​the humidity regulating plates being equal to the area of ​​the measuring unit.

[0009] As a further aspect of the present invention: the humidity regulating plate includes a plurality of spray ports and a heating resistance plate, the plurality of spray ports are evenly distributed on the heating resistance plate, the bottom of the humidity regulating plate is provided with a spray cavity, one end of the spray cavity is connected to the spray port, and the other end of the spray cavity is connected to a flow meter.

[0010] As a further aspect of the present invention: the control module calculates the difference between the initial humidity data and the preset humidity data;

[0011] If the initial humidity data is greater than the preset humidity data:

[0012] Heating data = (Initial humidity data - Preset humidity data) × Unit time × k;

[0013] The heating data refers to the operating temperature of the heating resistance plate, the unit time refers to the contact time between the heating resistance plate and the measuring unit, and k is a constant.

[0014] As a further aspect of the present invention: the control module calculates the difference between the initial humidity data and the preset humidity data;

[0015] If the initial humidity data equals the preset humidity data, the control module will not activate the humidity adjustment function of the humidity adjustment roller.

[0016] As a further aspect of the present invention: the control module calculates the difference between the initial humidity data and the preset humidity data;

[0017] If the initial humidity data is less than the preset humidity data:

[0018] Humidification data = (Preset humidity data - Initial humidity data) × Unit time × m;

[0019] The humidification data refers to the working flow rate of the flow meter, the unit time refers to the contact time between the heating resistance plate and the measuring unit, and m is a constant.

[0020] As a further aspect of the present invention: the humidity regulating roller is also provided with a calibration module, which calibrates the value of k or m according to the magnitude of the preset humidity data and the measured humidity data.

[0021] As a further aspect of the present invention: the calibration module determines the magnitude of the preset humidity data and the measured humidity data;

[0022] If the preset humidity data > the measured humidity data:

[0023] We need to decrease the value of k or increase the value of m;

[0024] If the preset humidity data = the measured humidity data:

[0025] The value of k or the value of m remains unchanged;

[0026] If the preset humidity data is less than the measured humidity data:

[0027] We need to either increase the value of k or decrease the value of m.

[0028] A paper calender is also provided, including a calender body on which a calender roll unit is mounted.

[0029] The beneficial effects of this invention are:

[0030] 1. In this invention, the initial humidity data of the paper can be obtained through the humidity detection matrix by the calendering roller unit. Then, the humidity control model is used to calculate the humidity of the paper by the humidity adjustment plate, so as to ensure that the humidity of the measuring unit on the paper is highly consistent when it enters the upper calendering roller and the lower calendering roller for calendering operation, so that the paper after calendering operation has good quality and high consistency.

[0031] 2. In this invention, the calibration module calibrates the humidity control model based on the preset humidity data and the measured humidity data, and improves the heating mode and humidification mode in the humidity control model, thereby ensuring the accuracy of the humidity of the measuring unit regulated by the humidity adjustment plate. Attached Figure Description

[0032] The invention will now be further described with reference to the accompanying drawings.

[0033] Figure 1 This is the front view of the present invention;

[0034] Figure 2 This is a partial cross-sectional view of the humidity regulating roller in this invention;

[0035] Figure 3 This is a front view of the humidity regulating plate in this invention;

[0036] Figure 4 This is a schematic diagram of the division of the measurement unit in this invention;

[0037] Figure 5 This is a flowchart of the control module in this invention;

[0038] Figure 6 This is a flowchart of the calibration module in this invention.

[0039] In the diagram: 1. Calender body; 2. Humidity detection matrix; 21. Humidity calibration matrix; 3. Guide roller; 4. Humidity regulating roller; 41. Control roller body; 42. Humidity regulating plate; 421. Spray port; 422. Heating resistor; 43. Spray chamber; 44. Solenoid valve; 5. Upper calender roller; 6. Lower calender roller; 7. Paper; 71. Measuring unit. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1:

[0042] like Figure 1 and Figure 4 As shown, this invention discloses a calendering roller unit and a paper calender, including a guide roller 3 with a humidity detection matrix 2 at its bottom and a humidity regulating roller 4 at its top. The humidity regulating roller 4 has a humidity calibration matrix 21 at its top. The humidity detection matrix 2 and the humidity calibration matrix 21 divide the paper 7 into several measurement units 71. The humidity detection matrix 2 is used to measure the initial humidity data of the measurement unit 71, and the humidity calibration matrix 21 is used to obtain the measured humidity data of the measurement unit 71. A control module is mounted on the humidity regulating roller 4. The control module is used to control the humidity regulating data of the humidity regulating roller 4. The control module uses a computer regression algorithm to establish a humidity control model based on the humidity regulating data and the difference between the initial humidity data and the measured humidity data. The humidity detection matrix 2 transmits the initial humidity data to the control module and inputs preset humidity data to the control module. The control module uses the humidity control model to predict the humidity regulating data of the humidity regulating roller 4 based on the difference between the initial humidity data and the preset humidity data. The humidity regulating data includes humidification data and heating data.

[0043] It should be noted that the humidity detection matrix 2 and the humidity calibration matrix 21 have the same structure, and the humidity detection matrix 2 and the humidity calibration matrix 21 use a capacitive humidity sensor or an infrared humidity detector.

[0044] Specifically, several capacitive humidity sensors or infrared humidity detectors are arranged in a straight line at equal intervals and set at the bottom of the guide roller 3 and the top surface of the humidity regulating roller 4. The interval between the capacitive humidity sensors or infrared humidity detectors is equal to the width of the measuring unit 71. When the paper 7 passes the bottom of the guide roller 3, the capacitive humidity sensors or infrared humidity detectors on the humidity detection matrix 2 will detect the humidity of the measuring unit 71 on the paper 7 and obtain the initial humidity data of the measuring unit 71. The capacitive humidity sensors or infrared humidity detectors work intermittently to ensure that the humidity detection matrix 2 can obtain the initial humidity data of all measuring units 71 on the paper 7.

[0045] The working principle of the humidity calibration matrix 21 is exactly the same as that of the humidity detection matrix 2. The difference is that the humidity calibration matrix 21 obtains the measured humidity data of all measurement units 71 on the paper 7 through a capacitive humidity sensor or an infrared humidity detector.

[0046] like Figure 1 As shown, an upper calendering roller 5 and a lower calendering roller 6 are provided on one side of the humidity regulating roller 4. The upper calendering roller 5 and the lower calendering roller 6 are specifically used to calender the paper 7. The preset humidity data that the control module needs to input is determined according to the specifications of the paper 7 and the pressure of the upper calendering roller 5 and the lower calendering roller 6. The preset humidity data is determined by those skilled in the art based on a large number of experiments. For example, the preset humidity data is set to 10%, which is a mass fraction.

[0047] like Figure 2 As shown, the humidity regulating roller 4 includes a control roller body 41, and a plurality of humidity regulating plates 42 are provided on the side of the control roller body 41. The area of ​​the humidity regulating plates 42 is equal to the area of ​​the measuring unit 71.

[0048] It should be noted that the control roller body 41 is equipped with a power module and a water tank. The water tank contains an atomizer and an air pump. The power module is directly connected to the atomizer and air pump in the water tank. When the air pump is working, it can draw water from the water tank through the atomizer. The atomizer will convert the water into mist during the water transfer process.

[0049] like Figure 2 and Figure 3 As shown, the humidity regulating plate 42 includes several spray ports 421 and a heating resistance plate 422. The several spray ports 421 are evenly distributed on the heating resistance plate 422. The bottom of the humidity regulating plate 42 is provided with a spray chamber 43. One end of the spray chamber 43 is connected to the spray port 421, and the other end of the spray chamber 43 is connected to a flow meter 44.

[0050] It should be noted that the output end of the air pump is connected to the spray chamber 43 through the flow meter 44. The air pump can deliver the mist converted by the atomizer to the spray chamber 43 through the flow meter 44. The spray chamber 43 then delivers the mist to several spray ports 421 at the same time. When the measuring unit 71 comes into contact with the humidity regulating plate 42, the humidity regulating plate 42 can spray the mist onto the measuring unit 71 to achieve the effect of increasing the humidity of the measuring unit 71.

[0051] The power module is also directly connected to the heating resistance plate 422. When the heating resistance plate 422 is needed to heat the measuring unit 71, the control module connects the power module and the heating resistance plate 422. The heating resistance plate 422 will convert electrical energy into heat energy, which will heat the measuring unit 71 and evaporate the moisture in the area of ​​the measuring unit 71, thereby reducing the humidity of the measuring unit 71.

[0052] like Figure 5 As shown, before using the calendering roller unit, the staff first trains the humidity control model using the control module, specifically following these steps:

[0053] Step 1: Pass the paper 7 through the guide roller 3 and the humidity regulating roller 4 in sequence, and then through the upper calendering roller 5 and the lower calendering roller 6;

[0054] Step 2: Obtain the rotation speed data and diameter data of the humidity regulating roller 4 to obtain the contact time between the measuring unit 71 and the humidity regulating plate 42.

[0055] Step 3: The control module obtains the initial humidity data of several measurement units 71 through the humidity detection matrix 2, and divides the several measurement units 71 into two groups. The first group of measurement units 71 uses the spray port 421 for humidification, and the second group of measurement units 71 uses the heating resistor 422 for heating.

[0056] Step 4: The control module adjusts the flow meter 44 corresponding to the spray port 421. A solenoid valve is installed between the flow meter 44 and the air pump. The solenoid valve is used to control the working flow of the flow meter 44. The working flow of the flow meter 44 can be set in stages.

[0057] Step 5: The control module adjusts the operating temperature of the heating resistor 422, and the operating temperature of the heating resistor 422 can be set in stages.

[0058] Step 6: After the two sets of measuring units 71 pass through the humidity adjustment plate 42, the control module obtains the measured humidity data of the two sets of measuring units 71 through the humidity calibration matrix 21.

[0059] For the first set of measuring units 71, humidification is performed through the spray port 421, so the measured humidity data must be greater than the initial humidity data. Then, the initial humidity data and the measured humidity data corresponding to the first set of measuring units 71 are substituted into the formula "humidification data = (preset humidity data - initial humidity data) × unit time × m".

[0060] The humidification data refers to the working flow rate of the flow meter 44, and the unit time refers to the contact time between the measuring unit 71 and the humidity regulating plate 42. Therefore, the value of m can be determined.

[0061] For the second set of measuring units 71, heating is performed by heating resistor 422, so the measured humidity data will inevitably be less than the initial humidity data. Then, the initial humidity data and the measured humidity data corresponding to the second set of measuring units 71 are substituted into the formula "Heating data = (initial humidity data - preset humidity data) × unit time × k".

[0062] The heating data refers to the working temperature of the heating resistance plate 422, and the unit time refers to the contact time between the heating resistance plate 422 and the measuring unit 71. Therefore, the value of k can be determined.

[0063] Step 7: Once the values ​​of k and m are determined, input the humidity control model into the control module. The humidity control model includes two working modes: humidification mode and heating mode. The humidification mode uses the formula "humidification data = (preset humidity data - initial humidity data) × unit time × m", and the heating mode uses the formula "heating data = (initial humidity data - preset humidity data) × unit time × k". The mode selection is determined by the control module based on the magnitude of the initial humidity data and the preset humidity data.

[0064] When the initial humidity data is greater than the preset humidity data, it indicates that the humidity of the measuring unit 71 is too high and the humidity of the measuring unit 71 needs to be reduced. Therefore, the control module selects the heating mode, that is, the humidity control model adopts the formula "heating data = (initial humidity data - preset humidity data) × unit time × k".

[0065] Specifically, the control module first obtains the initial humidity data of the measurement unit 71 through the humidity detection matrix 2. Then, the operator inputs the preset humidity data into the control module and substitutes the initial humidity data and the preset humidity data into the following formula:

[0066] Heating data = (Initial humidity data - Preset humidity data) × Unit time × k;

[0067] The heating data refers to the working temperature of the heating resistance plate 422, the unit time refers to the contact time between the heating resistance plate 422 and the measuring unit 71, and k is a constant, which is measured by the control module using the humidity control model.

[0068] For measurement units 71 with different initial humidity data, the humidity control model will output different heating data. Then, the control module controls the working temperature of the heating resistance plate 422 according to the heating data to ensure that the humidity of the measurement units 71 on the paper 7 is consistent when they enter the calendering operation between the upper calendering roller 5 and the lower calendering roller 6, so that the paper 7 that has undergone the calendering operation has good quality and high consistency.

[0069] Specifically, when the control module calculates the difference between the initial humidity data and the preset humidity data, if the initial humidity data is equal to the preset humidity data, it means that the humidity of the measuring unit 71 is the most suitable. At this time, the control module does not start the humidity adjustment function of the humidity adjustment roller 4, and the measuring unit 71 directly enters the space between the upper pressure roller 5 and the lower pressure roller 6 for pressure operation after passing through the humidity adjustment roller 4.

[0070] Example 2:

[0071] like Figure 5 As shown, unlike Example 1, when the initial humidity data is less than the preset humidity data, it indicates that the humidity of the measuring unit 71 is too low and the humidity of the measuring unit 71 needs to be increased. Therefore, the control module selects the humidification mode, that is, the humidity control model adopts the formula "humidification data = (preset humidity data - initial humidity data) × unit time × m".

[0072] Specifically, the control module first obtains the initial humidity data of the measurement unit 71 through the humidity detection matrix 2. Then, the operator inputs the preset humidity data into the control module and substitutes the initial humidity data and the preset humidity data into the following formula:

[0073] Humidification data = (Preset humidity data - Initial humidity data) × Unit time × m;

[0074] The humidification data refers to the working flow rate of the flow meter 44, the unit time refers to the contact time between the heating resistance plate 422 and the measuring unit 71, and m is a constant that is measured by the control module using the humidity control model.

[0075] For measurement units 71 with different initial humidity data, the humidity control model will output different humidification data. Then, the control module controls the solenoid valve between the flow meter 44 and the air pump according to the humidification data, and adjusts the working flow of the flow meter 44 to ensure that the humidity of the measurement units 71 on the paper 7 is consistent when they enter the calendering operation between the upper calendering roller 5 and the lower calendering roller 6, so that the paper 7 that has undergone the calendering operation has good quality and high consistency.

[0076] Example 3:

[0077] like Figure 6As shown, the humidity regulating roller 4 is also equipped with a calibration module, which calibrates the value of k or m according to the preset humidity data and the measured humidity data.

[0078] The calibration module compares the preset humidity data with the measured humidity data.

[0079] If the preset humidity data > the measured humidity data:

[0080] There are two scenarios: one is the case where the humidity control model in Example 1 selects the heating mode, and the other is the case where the humidity control model in Example 2 selects the humidification mode.

[0081] When selecting the heating mode for the humidity control model, if the preset humidity data > the measured humidity data, it means that after the humidity is adjusted by the humidity adjustment plate 42, the operating temperature of the heating resistor 422 is too high, causing the actual humidity of the measuring unit 71 to be less than the set humidity. As a result, when the measuring unit 71 enters the calendering roller 5 and the lower calendering roller 6 for calendering operation, the humidity of the measuring unit 71 will be too low. Therefore, it is necessary to reduce the operating temperature of the heating resistor 422.

[0082] Specifically:

[0083] k 校准 =[k×(initial humidity data - preset humidity data)] / (initial humidity data - measured humidity data);

[0084] Then k 校准 The value is assigned to k to improve the heating mode in the humidity control model and ensure the accuracy of the humidity of the measuring unit 71 adjusted by the humidity regulating plate 42.

[0085] When the humidity control model selects the humidification mode, the preset humidity data > the measured humidity data indicates that after the humidity is adjusted by the humidity adjustment plate 42, the spray volume of the spray port 421 is insufficient, resulting in the actual humidity of the measuring unit 71 being less than the set humidity. As a result, when the measuring unit 71 enters the calendering roller 5 and the lower calendering roller 6 for calendering operation, the humidity of the measuring unit 71 will be too low. Therefore, it is necessary to increase the spray volume of the spray port 421, that is, to increase the working flow rate of the flow meter 44.

[0086] Specifically:

[0087] m 校准 =[(Preset humidity data - Initial humidity data) × m] / (Measured humidity data - Initial humidity data);

[0088] Then m 校准 The value is assigned to m to improve the humidification mode in the humidity control model and ensure the accuracy of the humidity of the measuring unit 71 adjusted by the humidity adjustment plate 42.

[0089] If the preset humidity data = the measured humidity data:

[0090] The value of k or increasing the value of m remains unchanged;

[0091] If the preset humidity data is less than the measured humidity data:

[0092] There are still two cases: one is the case where the humidity control model in Example 1 selects the heating mode, and the other is the case where the humidity control model in Example 2 selects the humidification mode.

[0093] When selecting the heating mode for the humidity control model, the preset humidity data < measured humidity data indicates that after the humidity is adjusted by the humidity adjustment plate 42, the operating temperature of the heating resistor 422 is too low, causing the actual humidity of the measuring unit 71 to be greater than the set humidity. As a result, when the measuring unit 71 enters the calendering roller 5 and the lower calendering roller 6 for calendering operation, the humidity of the measuring unit 71 will be too high. Therefore, it is necessary to increase the operating temperature of the heating resistor 422.

[0094] Specifically:

[0095] k 校准 =[k×(initial humidity data - preset humidity data)] / (initial humidity data - measured humidity data);

[0096] Then k 校准 The value is assigned to k to improve the heating mode in the humidity control model and ensure the accuracy of the humidity of the measuring unit 71 adjusted by the humidity regulating plate 42.

[0097] When the humidity control model selects the humidification mode, the preset humidity data < measured humidity data indicates that after the humidity is adjusted by the humidity adjustment plate 42, the spray volume of the spray port 421 is too large, resulting in the actual humidity of the measuring unit 71 being greater than the set humidity. As a result, when the measuring unit 71 enters the calendering roller 5 and the lower calendering roller 6 for calendering operation, the humidity of the measuring unit 71 will be too high. Therefore, it is necessary to reduce the spray volume of the spray port 421, that is, reduce the working flow of the flow meter 44.

[0098] Specifically:

[0099] m 校准 =[(Preset humidity data - Initial humidity data) × m] / (Measured humidity data - Initial humidity data);

[0100] Then m 校准 The value of m is assigned to improve the humidification mode in the humidity control model, ensuring the accuracy of the humidity of the measuring unit 71 adjusted by the humidity regulating plate 42.

[0101] Example 4:

[0102] like Figure 1 As shown, the present invention also discloses a paper calender, which includes a calender body 1 and a calender roller unit mounted on the calender body 1. The paper calender uses a guide roller 3, a humidity regulating roller 4, an upper calender roller 5 and a lower calender roller 6 on the calender roller unit to perform calendering operations on paper 7.

[0103] It should be noted that the guide roller 3, humidity regulating roller 4, upper calendering roller 5, and lower calendering roller 6 are all mounted on the calender body 1 via a rotating shaft. The humidity detection matrix 2 is fixed on the side of the calender body 1 near the bottom of the guide roller 3. The humidity calibration matrix 21 is fixed inside the calender body 1 near the top of the humidity regulating roller 4. The upper calendering roller 5 and the lower calendering roller 6 are vertically arranged. The angle between the plane formed by the central axis of the guide roller 3 and the central axis of the humidity regulating roller 4 and the horizontal plane is 45°.

[0104] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A calendering roll unit of a paper calender, characterized in that, include: A guide roller (3) has a humidity detection matrix (2) at its bottom; a humidity regulating roller (4) is located on top of the guide roller (3), and a humidity calibration matrix (21) is located on top of the humidity regulating roller (4). The humidity detection matrix (2) and humidity calibration matrix (21) divide the paper (7) into several measurement units (71). The humidity detection matrix (2) is used for the initial humidity data of the measurement unit (71), and the humidity calibration matrix (21) is used to obtain the measured humidity data of the measurement unit (71). The control module is located on the humidity regulating roller (4). The control module is used to control the humidity regulating data of the humidity regulating roller (4). The control module uses a computer regression algorithm to establish a humidity control model based on the humidity regulating data and the difference between the initial humidity data and the measured humidity data. The humidity detection matrix (2) transmits the initial humidity data to the control module and inputs preset humidity data into the control module; The control module uses a humidity control model to predict the humidity adjustment data of the humidity adjustment roller (4) based on the difference between the initial humidity data and the preset humidity data. The humidity adjustment data includes humidification data and heating data. The humidity regulating roller (4) includes a control roller body (41), and a plurality of humidity regulating plates (42) are provided on the side of the control roller body (41). The area of ​​the humidity regulating plate (42) is equal to the area of ​​the measuring unit (71). The humidity regulating plate (42) includes several spray ports (421) and a heating resistance plate (422). The several spray ports (421) are evenly distributed on the heating resistance plate (422). The bottom of the humidity regulating plate (42) is provided with a spray chamber (43). One end of the spray chamber (43) is connected to the spray port (421), and the other end of the spray chamber (43) is connected to a flow meter (44).

2. The calendering roll unit of the paper calender according to claim 1, characterized in that, The humidity regulating roller (4) has an upper pressure roller (5) and a lower pressure roller (6) on one side.

3. The calendering roller unit of the paper calender according to claim 1, characterized in that, The control module calculates the difference between the initial humidity data and the preset humidity data; If the initial humidity data is greater than the preset humidity data: Heating data = (Initial humidity data - Preset humidity data) × Unit time × k; The heating data refers to the working temperature of the heating resistance plate (422), the unit time refers to the contact time between the heating resistance plate (422) and the measuring unit (71), and k is a constant.

4. The calendering roll unit of the paper calender according to claim 1, characterized in that, The control module calculates the difference between the initial humidity data and the preset humidity data; If the initial humidity data equals the preset humidity data, the control module will not activate the humidity adjustment function of the humidity adjustment roller (4).

5. The calendering roller unit of the paper calender according to claim 1, characterized in that, The control module calculates the difference between the initial humidity data and the preset humidity data; If the initial humidity data is less than the preset humidity data: Humidification data = (Preset humidity data - Initial humidity data) × Unit time × m; The humidification data refers to the working flow rate of the flow meter (44), the unit time refers to the contact time between the heating resistance plate (422) and the measuring unit (71), and m is a constant.

6. The calendering roll unit of the paper calender according to claim 3 or 5, characterized in that, The humidity regulating roller (4) is also equipped with a calibration module, which calibrates the value of k or m according to the magnitude of the preset humidity data and the measured humidity data.

7. The calendering roll unit of the paper calender according to claim 6, characterized in that, The calibration module determines the magnitude of the preset humidity data and the measured humidity data; If the preset humidity data > the measured humidity data: We need to decrease the value of k or increase the value of m; If the preset humidity data = the measured humidity data: The value of k or the value of m remains unchanged; If the preset humidity data is less than the measured humidity data: We need to either increase the value of k or decrease the value of m.

8. A paper calender, characterized in that, The paper calender includes the calender roll unit as described in any one of claims 1-7, and the calender body (1) is equipped with the calender roll unit.

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