Cigarette making machine oil supply constant temperature control system and its constant temperature control method

Abstract

The present invention discloses a constant temperature control system for oil supply of a cigarette making machine and its constant temperature control method. The system includes: an oil sump, an oil supply unit, an oil temperature outlet detection unit, a constant temperature circulation unit and a control module. The oil supply unit includes an oil sump oil temperature sensor, an oil sump liquid level sensor, an oil supply motor and an inlet oil pressure sensor. The oil temperature outlet detection unit includes sensors for detecting the temperatures of the main shaft return oil, the spider hand return oil, the first brand box return oil, the second brand box return oil, and the spiral reclaimed stem and splitting cutter head return oil. The constant temperature circulation unit includes an oil temperature stirring motor, a constant temperature circulation motor, a semiconductor refrigerator, an axial flow fan, a condensation temperature sensor and a circulation pipeline return oil temperature sensor. The semiconductor refrigerator includes condensation fins, pipelines and semiconductors. The constant temperature control system for oil supply of a cigarette making machine and its constant temperature control method provided by the present invention control the lubricating oil temperature within a reasonable range, keep the lubricating oil viscosity highly constant, reduce part wear, and improve the service life of seals.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette production, and particularly relates to a constant-temperature control system for oil supply of a cigarette making machine and a constant-temperature control method therefor. Background Art

[0002] As a machine for manufacturing cigarettes, the high-speed movement of the cigarette making machine not only requires the drive of an electric motor, but also requires precise cooperation and transmission of internal parts such as gears and bearings. A large amount of heat is generated by various frictions between the parts, and the lubricating oil circulates to play the roles of lubrication, heat dissipation, and temperature reduction. During long-term operation of the machine, the lubricating oil continuously accumulates heat, resulting in a continuous increase in temperature, accelerating the wear of mechanical parts, causing equipment failures, and at the same time accelerating the aging of the sealing rings, causing oil leakage, making the cigarette rods contaminated with oil, and causing serious quality accidents; while using a cooling device will cause the overall oil temperature to be too low, resulting in an increase in viscosity and a decrease in fluidity, causing equipment damage. The level of oil temperature not only affects the wear of transmission parts, but also affects the service life of seals.

[0003] Therefore, there is an urgent need for a constant-temperature control system for oil supply of a cigarette making machine and a constant-temperature control method therefor. Summary of the Invention

[0004] The purpose of the present invention is to provide a constant-temperature control system for oil supply of a cigarette making machine and a constant-temperature control method therefor to solve the above problems in the prior art, which can control the temperature of the lubricating oil within a reasonable range, maintain the high efficiency and constancy of the lubricating oil viscosity, reduce part wear, improve the service life of seals, and make the operation of the equipment more stable.

[0005] The present invention provides a constant-temperature control system for oil supply of a cigarette making machine, including:

[0006] An oil sump, an oil supply unit, an oil temperature outlet detection unit, a constant-temperature circulation unit, and a control module, wherein:

[0007] The oil sump is divided into an oil supply area and a constant-temperature circulation area by a partition, and the bottom of the partition communicates the oil supply area and the constant-temperature circulation area;

[0008] The oil supply unit includes an oil sump oil temperature sensor, an oil sump liquid level sensor, an oil supply motor, and an inlet oil pressure sensor. Among them, the oil sump oil temperature sensor is arranged on the left side of the oil sump to detect the oil temperature in the oil supply area, the oil sump liquid level sensor is arranged above the oil sump cover to detect the level of the oil sump liquid level, the oil supply motor is arranged on the oil sump cover in the oil supply area to supply oil for the operation of the machine, and the inlet oil pressure sensor is arranged on the pipeline of the oil supply inlet to detect the oil supply pressure of the pipeline and adjust the oil supply pressure by adjusting the rotation speed of the oil supply motor to maintain the constancy of the oil supply pressure;

[0009] The oil temperature outlet detection unit includes a main shaft return oil temperature sensor, a spider hand return oil temperature sensor, a first brand box return oil temperature sensor, a second brand box return oil temperature sensor, and a spiral stem and cutter head return oil temperature sensor;

[0010] The constant temperature circulation unit includes an oil temperature stirring motor, a constant temperature circulation motor, a semiconductor refrigerator, an axial flow fan, a condensation temperature sensor, and a circulating pipeline return oil temperature sensor. The oil temperature stirring motor and the constant temperature circulation motor are arranged on the oil tank cover plate of the constant temperature circulation area. The semiconductor refrigerator includes condensation fins, pipelines, and semiconductors. Among them, the pipelines are wound around the condensation fins, and the semiconductors are fixed on the condensation fins by a patch method to conduct the cold or heat generated by the semiconductors to the condensation fins. The axial flow fan is arranged at the rear end of the condensation fins on the semiconductor side to accelerate the conduction of the cold or heat dissipated by the semiconductors to the condensation fins. The condensation temperature sensor is arranged in the condensation fins, and the circulating pipeline return oil temperature sensor is arranged on the circulating return oil pipe on the side far from the semiconductor refrigerator;

[0011] The control module is respectively connected to the oil supply motor, the oil temperature stirring motor, and the constant temperature circulation motor, and is used to control the speed regulation operation of the oil supply motor, the oil temperature stirring motor, and the constant temperature circulation motor according to the detection results of the oil supply unit, the oil temperature outlet detection unit, and the constant temperature circulation unit.

[0012] For the cigarette making machine oil supply constant temperature control system as described above, preferably, the control module adopts a PLC controller, has a Profibus port, and is respectively connected to the frequency converters of the oil supply motor, the oil temperature stirring motor, and the constant temperature circulation motor through the Profibus port to control the speed regulation operation of the oil supply motor, the oil temperature stirring motor, and the constant temperature circulation motor in a bus mode.

[0013] For the cigarette making machine oil supply constant temperature control system as described above, preferably, the cigarette making machine oil supply constant temperature control system further includes an input / output module, which is respectively connected to the oil supply unit, the oil temperature outlet detection unit, the constant temperature circulation unit, and the control module.

[0014] The input / output module includes an analog input module, an analog output module, a digital input module, and a digital output module, where:

[0015] The analog input module is respectively connected to the oil sump liquid level sensor, the oil sump oil temperature sensor, the inlet oil pressure sensor, the main shaft return oil temperature sensor, the spider hand return oil temperature sensor, the first brand box return oil temperature sensor, the second brand box return oil temperature sensor, the spiral return stem and the splitting knife disc return oil temperature sensor, the condensation temperature sensor and the circulating pipeline return oil temperature sensor, and is used for collecting the voltage signals of 0 to 10V of each sensor, and converting the voltage signals into data signals of 0 to 32000, so as to provide the data signals to the control module for data calculation;

[0016] The analog output module is used for converting the data calculated by the control module into voltage signals of 0 to 10V, and controlling the temperature of the semiconductor cooler through the current regulating control module;

[0017] The digital input module is used for collecting the operation signals of the auxiliary drive of the cigarette machine;

[0018] The digital output module is used for controlling the temperature inversion of the semiconductor cooler 14 and the operation of the axial flow fan.

[0019] For the cigarette machine oil supply constant temperature control system as described above, preferably, the cigarette machine oil supply constant temperature control system further includes a human-machine interaction module, which is used for real-time feedback of the control situation of the overall oil temperature through a curve graph and reflecting the alarm information in the oil temperature control.

[0020] The present invention also provides a cigarette machine oil supply constant temperature control method adopting the above system, including:

[0021] Step S1, the auxiliary drive of the cigarette machine is turned on, the oil temperature in the oil supply area is detected through the oil sump oil temperature sensor, and the oil temperature detection result is sent to the control module, and the liquid level of the oil sump is detected through the oil sump liquid level sensor, and the liquid level detection result is sent to the control module; the control module judges whether the oil temperature of the oil sump detected by the oil sump oil temperature sensor is between the first temperature threshold and the second temperature threshold, and whether the liquid level of the oil sump detected by the oil sump liquid level sensor is greater than or equal to the preset liquid level threshold, wherein the first temperature threshold is less than the second temperature threshold;

[0022] Step S2, if not satisfied, the auxiliary drive cannot be turned on; if satisfied, the control module controls the oil supply motor to supply oil at a preset oil supply start frequency, and controls the oil temperature stirring motor to stir at a preset stirring start frequency;

[0023] Step S3, the oil supply pressure of the pipeline is detected through the inlet oil pressure sensor, and the inlet oil pressure detection result is sent to the control module, and the control module adjusts the rotation speed of the oil supply motor through the frequency converter according to the inlet oil pressure detection result to adjust the oil supply pressure;

[0024] Step S4: Detect the oil temperature in the oil supply area through the oil sump temperature sensor, and send the oil temperature detection result to the control module. The control module determines whether the oil temperature in the oil sump detected by the oil sump temperature sensor is between the first temperature threshold and the second temperature threshold;

[0025] Step S5: If so, return to Step S4. If not, the control module sequentially determines the spindle return oil temperature detected by the spindle return oil temperature sensor, the spider hand return oil temperature detected by the spider hand return oil temperature sensor, the first brand box return oil temperature detected by the first brand box return oil temperature sensor, the second brand box return oil temperature detected by the second brand box return oil temperature sensor, and whether the spiral return stem and the splitter plate return oil temperature detected by the spiral return stem and splitter plate return oil temperature sensor are less than the first temperature threshold or greater than the second temperature threshold, and record the data;

[0026] Step S6: The control module determines whether the oil temperature in the oil sump detected by the oil sump temperature sensor is less than the first temperature threshold or greater than the second temperature threshold;

[0027] Step S7: According to the magnitude relationship between the oil sump temperature and the first temperature threshold or the second temperature threshold, select the lowest or highest item among the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, and the spiral return stem and splitter plate return oil temperature as the reference temperature. The control module adjusts the speed of the oil sump stirring motor through the frequency converter, and the controller controls the semiconductor refrigerator to heat or cool to the regulated temperature according to the reference temperature.

[0028] For the cigarette making machine oil supply constant temperature control method as described above, preferably, in Step S3, the control module adjusts the speed of the oil supply motor through the frequency converter according to the oil inlet pressure detection result to adjust the oil supply pressure, specifically including:

[0029] If the oil inlet pressure is less than the first preset pressure threshold, the frequency of the oil supply motor is increased by the first preset amplitude through the frequency converter, so as to increase the speed of the oil supply motor by the first preset amplitude;

[0030] If the oil inlet pressure is greater than or equal to the second preset pressure threshold, the frequency of the oil supply motor is decreased by the second preset amplitude through the frequency converter, so as to decrease the speed of the oil supply motor by the second preset amplitude;

[0031] If the oil inlet pressure is between the second preset pressure threshold and the second preset pressure threshold, the frequency of the oil supply motor remains constant;

[0032] After a preset time, return to the step of judging the oil inlet pressure.

[0033] The cigarette making machine oil supply constant temperature control method as described above, wherein, preferably, in step S5, the control module sequentially determines the spindle return oil temperature detected by the spindle return oil temperature sensor 7, the spider hand return oil temperature detected by the spider hand return oil temperature sensor 8, the first brand box return oil temperature detected by the first brand box return oil temperature sensor 9, the second brand box return oil temperature detected by the second brand box return oil temperature sensor 10, and whether the spiral re-stemming and splitting disc return oil temperature detected by the spiral re-stemming and splitting disc return oil temperature sensor 11 is less than the first temperature threshold or greater than the second temperature threshold, and records the data, specifically including:

[0034] Record the current oil sump oil temperature through register 0 inside the control module. If the oil sump oil temperature is greater than the second temperature threshold or less than the first temperature threshold;

[0035] Then gradually determine whether the spindle return oil temperature, spider hand return oil temperature, first brand box return oil temperature, second brand box return oil temperature, and spiral re-stemming and splitting disc return oil temperature are greater than the second temperature threshold or less than the first temperature threshold, and record the corresponding return oil temperatures in registers 1, 2, 3, 4, and 5 inside the control module respectively.

[0036] The cigarette making machine oil supply constant temperature control method as described above, wherein, preferably, in the case where the oil sump oil temperature is less than the first temperature threshold, step S7: According to the magnitude relationship between the oil sump oil temperature and the first temperature threshold or the second temperature threshold, select the lowest or highest item among the spindle return oil temperature, spider hand return oil temperature, first brand box return oil temperature, second brand box return oil temperature, and spiral re-stemming and splitting disc return oil temperature as the reference temperature. The control module adjusts the speed of the oil sump stirring motor through the frequency converter, and the controller controls the semiconductor cooler to heat or cool to the regulated temperature according to the reference temperature, specifically including:

[0037] Step S71: If the oil sump oil temperature is less than the first temperature threshold, select the lowest item among the spindle return oil temperature, spider hand return oil temperature, first brand box return oil temperature, second brand box return oil temperature, and spiral re-stemming and splitting disc return oil temperature as the reference temperature;

[0038] Step S72: The control module increases the speed of the oil sump stirring motor through the frequency converter;

[0039] Step S73: The controller controls the semiconductor cooler to heat to the regulated temperature according to the reference temperature;

[0040] Step S74: The constant temperature circulation motor operates at a constant frequency of 20 Hz;

[0041] Step S75: Determine whether the oil temperature in the circulation pipeline is between the first temperature threshold and the second temperature threshold. If not, make up for the difference between the heating temperature and the temperature of the circulation pipeline, and return to step S73.

[0042] For the constant temperature control method of the oil supply of the cigarette making machine as described above, preferably, in step S71, select the lowest item among the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, the spiral return stem and the splitting knife disc return oil temperature as the reference temperature, which specifically includes:

[0043] Compare the temperature data in register 1 - register 5, and take the minimum temperature as the reference value Tda.

[0044] In step S73, the controller controls the semiconductor cooler to heat to the regulated temperature according to the reference temperature, which specifically includes:

[0045] Calculate the temperature heating point to be reached through the following formula.

[0046]

[0047] Among them, Tam represents the normal constant temperature, Tda represents the reference temperature, Tmax represents the second temperature threshold, Tmin represents the first temperature threshold, Tou represents the circulation pipeline return oil temperature, Tin represents the semiconductor cooler temperature, and To represents the temperature heating point to be reached.

[0048] The semiconductor cooler performs heating work, and the temperature heating regulation is carried out through the following formula.

[0049]

[0050] Among them, kp represents the proportionality coefficient in the range from high temperature to low temperature, Ti represents the response time coefficient approaching the low temperature range, and Td represents the pre-regulation time coefficient approaching the low temperature range.

[0051] For the constant temperature control method of the oil supply of the cigarette making machine as described above, preferably, when the oil temperature in the oil sump is less than the first temperature threshold, in step S7, select the lowest item or the highest item among the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, the spiral return stem and the splitting knife disc return oil temperature as the reference temperature according to the size of the oil temperature in the oil sump and the first temperature threshold or the second temperature threshold. The control module adjusts the speed of the oil sump stirring motor through the frequency converter, and the controller controls the semiconductor cooler to heat or cool to the regulated temperature according to the reference temperature, which specifically includes:

[0052] Step S71-1: If the oil temperature in the oil sump is greater than the second temperature threshold, select the highest value among the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, the spiral return stem and the splitting tool disc return oil temperature as the reference temperature;

[0053] Step S72-1: The control module determines whether the difference between the reference temperature and the second temperature threshold is greater than the preset temperature difference threshold. If so, the control module reduces the speed of the oil sump stirring motor through the frequency converter;

[0054] Step S73-1: The controller controls the semiconductor refrigerator to refrigerate to the regulated temperature according to the reference temperature;

[0055] Step S74-1: The constant temperature circulation motor operates at a constant frequency of 30Hz, and for every 1°C increase in the oil temperature in the oil sump, the frequency increases by 1Hz. If the oil temperature in the oil sump exceeds the third temperature threshold, it operates at the highest frequency;

[0056] Step 75-1: Determine whether the oil temperature in the circulation pipeline is between the first temperature threshold and the second temperature threshold. If not, make up for the temperature difference between the refrigeration temperature and the temperature of the circulation pipeline, and return to Step S73-1;

[0057] Among them, when the oil temperature in the oil sump is greater than the second temperature threshold, the Step S71-1: Select the highest value among the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, the spiral return stem and the splitting tool disc return oil temperature as the reference temperature, specifically includes:

[0058] Compare the temperature data in register 1 to register 5, and take the largest temperature data as the reference value Tda;

[0059] The Step S73-1: The controller controls the semiconductor refrigerator to refrigerate to the regulated temperature according to the reference temperature, specifically includes:

[0060] Calculate the temperature refrigeration point to be reached through the following formula,

[0061]

[0062] Among them, Tam represents the normal constant temperature, Tda represents the reference temperature, Tmax represents the second temperature threshold, Tmin represents the first temperature threshold, Tou represents the circulation pipeline return oil temperature, Tin represents the semiconductor refrigerator temperature, and To represents the temperature refrigeration point to be reached;

[0063] The semiconductor refrigerator performs refrigeration work, and the temperature refrigeration regulation is carried out through the following formula,

[0064]

[0065] Among them, kp represents the proportionality coefficient in the range from high temperature to low temperature, Ti represents the response time coefficient approaching the low temperature range, and Td represents the pre-regulation time coefficient approaching the low temperature range.

[0066] In step S74-1, the constant temperature circulation motor operates at a constant frequency of 30 Hz, and for every 1 °C increase in the oil temperature of the oil sump, the frequency increases by 1 Hz. If the oil temperature of the oil sump exceeds the third temperature threshold, it operates at the highest frequency. Specifically, it includes:

[0067] The constant temperature circulation motor operates at a reference frequency of 30 Hz. The difference obtained by subtracting the second temperature threshold from the reference temperature Tda is used as the number of Hertz by which the frequency of the constant temperature circulation motor increases. When the oil temperature of the oil sump is greater than or equal to 65 °C, the constant temperature circulation motor operates at the highest frequency. When the feedback return oil temperature of the circulation pipeline reaches the constant temperature range, after a 5 s delay, temperature acquisition and regulation are carried out again.

[0068] The constant temperature control system for oil supply of a cigarette making machine and its constant temperature control method according to the present invention can ensure the constancy of oil temperature control, significantly reduce the temperature of each lubricated part of the equipment, improve the wear condition of the parts, extend the service life of the seals, reduce the equipment maintenance time, improve the effective operation rate of the equipment, and reduce the occurrence of cigarette quality accidents; it works stably and reliably, keeps the lubricating oil temperature within the most effective range, significantly increases the service life of the seals, reduces the risk of cigarette contamination, effectively reduces the equipment maintenance time, improves the effective operation rate of the equipment, reduces the consumption of spare parts, and improves the overall efficiency; it reduces the risk of cigarette contamination and has good market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described below in conjunction with the drawings, where:

[0070] Figure 1 is a schematic structural diagram of an embodiment of the constant temperature control system for oil supply of a cigarette making machine provided by the present invention;

[0071] Figure 2 is a control principle diagram of the constant temperature control system for oil supply of a cigarette making machine provided by the present invention;

[0072] Figure 3 is a flowchart of an embodiment of the constant temperature control method for oil supply of a cigarette making machine provided by the present invention;

[0073] Figure 4 is a logic diagram for adjusting the inlet oil pressure in an embodiment of the constant temperature control method for oil supply of a cigarette making machine provided by the present invention;

[0074] Figure 5 is a logic diagram of an embodiment of the constant temperature control method for oil supply of a cigarette making machine provided by the present invention.

[0075] Description of Reference Numerals: 1 - oil sump oil temperature sensor, 2 - oil sump liquid level sensor, 3 - oil supply motor, 4 - oil temperature stirring motor, 5 - inlet oil pressure sensor, 6 - constant temperature circulation motor, 7 - spindle return oil temperature sensor, 8 - robot arm return oil temperature sensor, 9 - first label box return oil temperature sensor, 10 - second label box return oil temperature sensor, 111 - spiral return stem and splitter plate return oil temperature sensor, 12 - axial flow fan, 13 - condensation temperature sensor, 14 - semiconductor refrigerator, 15 - circulating pipeline return oil temperature sensor, 16 - oil supply area, 17 - constant temperature circulation area. Detailed Implementation Modes

[0076] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions and values set forth in these embodiments should be construed as merely exemplary and not as limitations.

[0077] The "first", "second", and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "comprising" or "including" mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements. Terms such as "upper" and "lower" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0078] In the present disclosure, when it is described that a specific component is located between a first component and a second component, there may or may not be an intermediate component between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without an intermediate component, or may not be directly connected to the other components and have an intermediate component.

[0079] All terms used in the present disclosure (including technical terms or scientific terms) have the same meaning as understood by those of ordinary skill in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary such as should be interpreted as having a meaning consistent with their meaning in the context of the related art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0080] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be considered part of the specification.

[0081] As Figure 1 shown, the constant temperature control system for fuel supply of the cigarette making machine provided in this embodiment includes: an oil tank, a fuel supply unit, an oil temperature outlet detection unit, a constant temperature circulation unit, and a control module, where:

[0082] The oil tank is separated into a fuel supply area 16 and a constant temperature circulation area 17 by a partition board, and the bottom of the partition board communicates the fuel supply area 16 and the constant temperature circulation area 17;

[0083] The fuel supply unit includes an oil tank oil temperature sensor 1, an oil tank liquid level sensor 2, a fuel supply motor 3, and an inlet oil pressure sensor 5. Among them, the oil tank oil temperature sensor 1 is arranged on the left side of the oil tank to detect the oil temperature in the fuel supply area, the oil tank liquid level sensor 2 is arranged above the oil tank cover to detect the height of the oil level in the oil tank, the fuel supply motor 3 is arranged on the oil tank cover in the fuel supply area to supply fuel for the operation of the machine, and the inlet oil pressure sensor 5 is arranged on the pipeline at the fuel supply inlet to detect the fuel supply pressure of the pipeline, and adjusts the rotation speed of the fuel supply motor 3 to adjust the fuel supply pressure so as to keep the fuel supply pressure constant;

[0084] The oil temperature outlet detection unit includes a main shaft return oil temperature sensor 7, a spider hand return oil temperature sensor 8, a first brand box return oil temperature sensor 9, a second brand box return oil temperature sensor 10, and a spiral return stem and splitting knife disc return oil temperature sensor 11;

[0085] The constant temperature circulation unit includes an oil temperature stirring motor 4, a constant temperature circulation motor 6, a semiconductor refrigerator 14, an axial flow fan 12, a condensation temperature sensor 13, and a circulation pipeline return oil temperature sensor 15. The oil temperature stirring motor 4 and the constant temperature circulation motor 6 are arranged on the oil tank cover in the constant temperature circulation area 17. The semiconductor refrigerator 14 includes condensation fins, pipelines, and semiconductors. Among them, the pipelines are wound around the condensation fins, and the semiconductors are fixed on the condensation fins by a patch method to conduct the cold or heat generated by the semiconductors to the condensation fins. The axial flow fan 12 is arranged at the rear end of the condensation fins on the semiconductor side to accelerate the conduction of the cold or heat dissipated by the semiconductors to the condensation fins. The condensation temperature sensor 13 is arranged in the condensation fins, and the circulation pipeline return oil temperature sensor 15 is arranged on the circulation return oil pipe on the side far from the semiconductor refrigerator 14;

[0086] The control module is respectively connected to the fuel supply motor 3, the oil temperature stirring motor 4 and the constant temperature circulation motor 6, and is used to control the speed regulation operation of the fuel supply motor 3, the oil temperature stirring motor 4 and the constant temperature circulation motor 6 according to the detection results of the fuel supply unit, the oil temperature outlet detection unit and the constant temperature circulation unit.

[0087] Among them, as Figure 2 shown, the control module adopts a PLC controller, has a Profibus port, and is respectively connected to the frequency converters of the fuel supply motor 3, the oil temperature stirring motor 4 and the constant temperature circulation motor 6 through the Profibus port, so as to control the speed regulation operation of the fuel supply motor 3, the oil temperature stirring motor 4 and the constant temperature circulation motor 6 in a bus mode.

[0088] Furthermore, as Figure 2 shown, the cigarette making machine fuel supply constant temperature control system further includes an input / output module, which is respectively connected to the fuel supply unit, the oil temperature outlet detection unit, the constant temperature circulation unit and the control module.

[0089] The input / output module includes an analog input module, an analog output module, a digital input module and a digital output module, where:

[0090] The analog input module is respectively connected to the oil sump liquid level sensor 2, the oil sump oil temperature sensor 1, the inlet oil pressure sensor 5, the main shaft return oil temperature sensor 7, the spider hand return oil temperature sensor 8, the first brand box return oil temperature sensor 9, the second brand box return oil temperature sensor 10, the spiral reclaimed stem and splitting disc return oil temperature sensor 11, the condensation temperature sensor 13 and the circulation pipeline return oil temperature sensor 15, and is used to collect the 0-10V voltage signals of each sensor, and convert the voltage signals into 0-32000 data signals, so as to provide the data signals to the control module for data calculation.

[0091] The analog output module is used to convert the data calculated by the control module into 0-10V voltage signals, and control the temperature of the semiconductor cooler 14 through a current regulation control module.

[0092] The digital input module is used to collect the operation signals of the auxiliary drive of the cigarette making machine.

[0093] The digital output module is used to control the temperature inversion of the semiconductor cooler 14 and the operation of the axial flow fan 12.

[0094] Even further, the cigarette making machine fuel supply constant temperature control system further includes a human-machine interaction module, which is used to real-time feedback the control situation of the overall oil temperature through a curve graph and reflect the alarm information in the oil temperature control.

[0095] Correspondingly, as Figures 3 - 5 shown, in the actual execution process of the constant temperature control method for oil supply of the cigarette making machine provided in this embodiment, the following steps are specifically included:

[0096] Step S1: As Figure 4 shown, the auxiliary drive of the cigarette making machine is turned on, the oil temperature in the oil supply area is detected by the oil sump oil temperature sensor, and the oil temperature detection result is sent to the control module. The height of the oil sump liquid level is detected by the oil sump liquid level sensor, and the liquid level detection result is sent to the control module. The control module determines whether the oil temperature of the oil sump detected by the oil sump oil temperature sensor is between the first temperature threshold (for example, 35°C) and the second temperature threshold (for example, 45°C), and whether the oil sump liquid level detected by the oil sump liquid level sensor is greater than or equal to the preset liquid level threshold (for example, 50%), where the first temperature threshold is less than the second temperature threshold.

[0097] Step S2: If not satisfied, the auxiliary drive cannot be turned on; if satisfied, the control module controls the oil supply motor to supply oil at a preset oil supply start frequency (for example, 25 Hz), and controls the oil temperature stirring motor to stir at a preset stirring start frequency (for example, 15 Hz).

[0098] Step S3: The oil supply pressure of the pipeline is detected by the inlet oil pressure sensor 5, and the inlet oil pressure detection result is sent to the control module. The control module adjusts the speed of the oil supply motor 3 through the frequency converter according to the inlet oil pressure detection result to adjust the oil supply pressure.

[0099] In an implementation manner of the constant temperature control method for oil supply of the cigarette making machine of the present invention, step S3 may specifically include:

[0100] Step S31: If the inlet oil pressure is less than the first preset pressure threshold (for example, 0.2 MPa), the frequency of the oil supply motor is increased by the first preset amplitude (for example, 5%) through the frequency converter, so as to increase the speed of the oil supply motor by the first preset amplitude.

[0101] Step S32: If the inlet oil pressure is greater than or equal to the second preset pressure threshold (for example, 0.35 MPa), the frequency of the oil supply motor is decreased by the second preset amplitude (for example, 5%) through the frequency converter, so as to decrease the speed of the oil supply motor by the second preset amplitude.

[0102] Wherein, the first preset amplitude and the second preset amplitude may be the same or different, and the present invention does not make specific limitations on this.

[0103] Step S33: If the inlet oil pressure is between the second preset pressure threshold and the second preset pressure threshold, the frequency of the oil supply motor remains constant.

[0104] Step S34: After a preset time (e.g., 10 s), return to the step of judging the inlet oil pressure.

[0105] Step S4: As Figure 5 shown, the oil temperature of the oil supply area is detected by the oil sump temperature sensor 1, and the oil temperature detection result is sent to the control module. The control module judges whether the oil temperature of the oil sump detected by the oil sump temperature sensor is between the first temperature threshold and the second temperature threshold.

[0106] Step S5: If so, return to Step S4; if not, the control module sequentially judges the spindle return oil temperature detected by the spindle return oil temperature sensor 7, the spider hand return oil temperature detected by the spider hand return oil temperature sensor 8, the first brand box return oil temperature detected by the first brand box return oil temperature sensor 9, the second brand box return oil temperature detected by the second brand box return oil temperature sensor 10, and the spiral return stem and splitting knife disc return oil temperature detected by the spiral return stem and splitting knife disc return oil temperature sensor 11 to see if they are less than the first temperature threshold or greater than the second temperature threshold, and record the data.

[0107] As Figure 5 shown, in an implementation manner of the cigarette machine oil supply constant temperature control method of the present invention, the step S5 may specifically include:

[0108] Step S51: Record the current oil temperature of the oil sump through register 0 inside the control module. If the oil temperature of the oil sump is greater than the second temperature threshold (45 °C) or less than the first temperature threshold (35 °C).

[0109] Step S52: Then gradually judge whether the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, and the spiral return stem and splitting knife disc return oil temperature are greater than the second temperature threshold (45 °C) or less than the first temperature threshold (35 °C), and record the corresponding return oil temperatures in registers 1, 2, 3, 4, and 5 inside the control module respectively.

[0110] Step S6: The control module judges whether the oil temperature of the oil sump detected by the oil sump temperature sensor 1 is less than the first temperature threshold (35 °C) or greater than the second temperature threshold (45 °C).

[0111] Step S7: According to the comparison between the oil temperature of the oil sump and the first temperature threshold (35 °C) or the second temperature threshold (45 °C), select the lowest or highest item among the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, and the spiral return stem and splitting knife disc return oil temperature as the reference temperature. The control module adjusts the speed of the oil sump stirring motor through the frequency converter, and the controller controls the semiconductor cooler to heat or cool to the regulated temperature according to the reference temperature.

[0112] In an implementation of the constant temperature control method for oil supply of a cigarette making machine according to the present invention, when the oil temperature in the oil sump is lower than the first temperature threshold, step S7 may specifically include:

[0113] Step S71: If the oil temperature in the oil sump is lower than the first temperature threshold (35 °C), select the lowest value among the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, the spiral stem return and the splitting knife disc return oil temperature as the reference temperature.

[0114] Specifically, compare the temperature data in registers 1 - 5, and take the minimum temperature as the reference value Tda.

[0115] Step S72: The control module increases the speed of the oil sump stirring motor through the frequency converter.

[0116] Step S73: The controller controls the semiconductor cooler to heat up to the regulated temperature according to the reference temperature.

[0117] In an implementation of the constant temperature control method for oil supply of a cigarette making machine according to the present invention, step S73 may specifically include:

[0118] Step S731: Calculate the temperature hot spot to be reached through the following formula,

[0119]

[0120] where Tam represents the normal constant temperature, Tda represents the reference temperature, Tmax represents the second temperature threshold, Tmin represents the first temperature threshold, Tou represents the return oil temperature of the circulation pipeline, Tin represents the temperature of the semiconductor cooler, and To represents the temperature hot spot to be reached.

[0121] Step S732: The semiconductor cooler performs heating work, and conducts temperature heating regulation through the following formula,

[0122]

[0123] where kp represents the proportionality coefficient in the range from high temperature to low temperature, Ti represents the response time coefficient approaching the low temperature range, and Td represents the pre-regulation time coefficient approaching the low temperature range. It should be noted that kp is related to the selected cooling material, and Ti and Td need to be adjusted through trial and error during debugging. They are not specific values, and different equipment characteristics have differences, and the corresponding values are also different.

[0124] Step S74: The constant temperature circulation motor operates at a constant frequency of 20 Hz.

[0125] When the feedback return oil temperature of the circulation pipeline reaches the constant temperature range, after a 5 s delay, the temperature acquisition and regulation are carried out again.

[0126] Step S75: Determine whether the oil temperature in the circulation pipeline is between the first temperature threshold (35°C) and the second temperature threshold (45°C). If not, make up the difference between the heating temperature and the temperature of the circulation pipeline, and return to Step S73.

[0127] In an embodiment of the constant temperature control method for oil supply of a cigarette making machine according to the present invention, when the oil temperature in the oil sump is greater than the second temperature threshold, Step S7 may specifically include:

[0128] Step S71-1: If the oil temperature in the oil sump is greater than the second temperature threshold (45°C), select the highest value among the main shaft return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, the spiral return stem and the splitter plate return oil temperature as the reference temperature.

[0129] Specifically, compare the temperature data in registers 1 to 5, and use the largest temperature data as the reference value Tda.

[0130] Step S72-1: The control module determines whether the difference between the reference temperature and the second temperature threshold is greater than the preset temperature difference threshold. If so, the control module reduces the speed of the oil sump stirring motor through the frequency converter (for example, the reduction amplitude is 10%).

[0131] Step S73-1: The controller controls the semiconductor refrigerator to refrigerate to the regulated temperature according to the reference temperature.

[0132] In an embodiment of the constant temperature control method for oil supply of a cigarette making machine according to the present invention, Step S73-1 may specifically include:

[0133] Step S73-11: Calculate the temperature refrigeration point to be reached through the following formula,

[0134]

[0135] where Tam represents the normal constant temperature, Tda represents the reference temperature, Tmax represents the second temperature threshold, Tmin represents the first temperature threshold, Tou represents the circulation pipeline return oil temperature, Tin represents the semiconductor refrigerator temperature, and To represents the temperature refrigeration point to be reached.

[0136] Step S73-12: The semiconductor refrigerator performs refrigeration work, and conducts temperature refrigeration regulation through the following formula,

[0137]

[0138] where kp represents the proportionality coefficient in the range from high temperature to low temperature, Ti represents the response time coefficient approaching the low temperature range, and Td represents the pre-regulation time coefficient approaching the low temperature range.

[0139] Step S74-1: The constant-temperature circulation motor operates at a constant frequency of 30 Hz. And for every 1°C increase in the oil temperature of the oil sump, the frequency increases by 1 Hz. If the oil temperature of the oil sump exceeds the third temperature threshold (e.g., 5°C), it operates at the maximum frequency.

[0140] Specifically, the constant-temperature circulation motor operates at a reference frequency of 30 Hz. The difference obtained by subtracting the second temperature threshold from the reference temperature Tda is used as the number of Hertz for the frequency increase of the constant-temperature circulation motor. When the oil temperature of the oil sump is greater than or equal to 65°C, the constant-temperature circulation motor operates at the maximum frequency. When the feedback oil return temperature of the circulation pipeline reaches the constant temperature range, after a 5-second delay, the temperature acquisition and regulation are carried out again.

[0141] Step 75-1: Determine whether the oil temperature of the circulation pipeline is between the first temperature threshold and the second temperature threshold. If not, make up for the difference between the refrigeration temperature and the temperature of the circulation pipeline, and return to Step S73-1.

[0142] Furthermore, in some embodiments of the present invention, the constant-temperature control method for the oil supply of the cigarette machine further includes:

[0143] Step S8: In the case where the auxiliary drive cannot be started, the control module controls the human-machine interaction module to alarm and display the fault information.

[0144] The constant-temperature control system for the oil supply of the cigarette machine and its constant-temperature control method provided by the embodiments of the present invention can ensure the constancy of the oil temperature control, significantly reduce the temperature of each lubrication part of the equipment, improve the wear condition of the parts, extend the service life of the seals, reduce the equipment maintenance time, improve the effective operation rate of the equipment, and reduce the occurrence of cigarette quality accidents; it works stably and reliably, keeps the lubricating oil temperature within the most effective range, significantly increases the service life of the seals, reduces the risk of cigarette contamination, effectively reduces the equipment maintenance time, improves the effective operation rate of the equipment, reduces the consumption of spare parts, and improves the overall efficiency; it reduces the risk of cigarette contamination and has a good market application prospect.

[0145] So far, the embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0146] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A constant temperature control method for the fuel supply of a cigarette making machine using a constant temperature control system for the fuel supply of the cigarette making machine, characterized in that, The oil supply constant temperature control system of the cigarette making machine includes: An oil tank, an oil supply unit, an oil temperature outlet detection unit, a constant temperature circulation unit, and a control module, where: The oil tank is separated into an oil supply area and a constant temperature circulation area by a partition board, and the bottom of the partition board connects the oil supply area and the constant temperature circulation area; The oil supply unit includes an oil tank oil temperature sensor, an oil tank liquid level sensor, an oil supply motor, and an inlet oil pressure sensor. Among them, the oil tank oil temperature sensor is arranged on the left side of the oil tank to detect the oil temperature of the oil supply area, the oil tank liquid level sensor is arranged above the oil tank cover to detect the height of the oil tank liquid level, the oil supply motor is arranged on the oil tank cover of the oil supply area to supply oil for the operation of the machine, and the inlet oil pressure sensor is arranged on the pipeline of the oil supply inlet to detect the oil supply pressure of the pipeline, and adjusts the oil supply pressure by adjusting the rotation speed of the oil supply motor to keep the oil supply pressure constant; The oil temperature outlet detection unit includes a main shaft return oil temperature sensor, a spider hand return oil temperature sensor, a first brand box return oil temperature sensor, a second brand box return oil temperature sensor, and a spiral return stem and splitting knife disc return oil temperature sensor; The constant temperature circulation unit includes an oil temperature stirring motor, a constant temperature circulation motor, a semiconductor refrigerator, an axial flow fan, a condensation temperature sensor, and a circulating pipeline return oil temperature sensor. The oil temperature stirring motor and the constant temperature circulation motor are arranged on the oil tank cover of the constant temperature circulation area. The semiconductor refrigerator includes condensation fins, a pipeline, and a semiconductor. Among them, the pipeline is wound around the condensation fins, and the semiconductor is fixed on the condensation fins by a patch method to conduct the cold or heat generated by the semiconductor to the condensation fins. The axial flow fan is arranged at the rear end of the condensation fins on the semiconductor side to accelerate the conduction of the cold or heat dissipated by the semiconductor to the condensation fins. The condensation temperature sensor is arranged in the condensation fins, and the circulating pipeline return oil temperature sensor is arranged on the circulating return oil pipe on the side far from the semiconductor refrigerator; The control module is respectively connected to the oil supply motor, the oil temperature stirring motor, and the constant temperature circulation motor, and is used to control the speed regulation operation of the oil supply motor, the oil temperature stirring motor, and the constant temperature circulation motor according to the detection results of the oil supply unit, the oil temperature outlet detection unit, and the constant temperature circulation unit; The oil supply constant temperature control method of the cigarette making machine includes the following steps: Step S1: The auxiliary drive of the cigarette making machine is turned on. The oil temperature of the oil supply area is detected by the oil tank oil temperature sensor, and the oil temperature detection result is sent to the control module. The height of the oil tank liquid level is detected by the oil tank liquid level sensor, and the liquid level detection result is sent to the control module. The control module judges whether the oil temperature of the oil tank detected by the oil tank oil temperature sensor is between a first temperature threshold and a second temperature threshold, and whether the oil tank liquid level detected by the oil tank liquid level sensor is greater than or equal to a preset liquid level threshold, where the first temperature threshold is less than the second temperature threshold; Step S2: If not satisfied, the auxiliary drive cannot be started; if satisfied, the control module controls the fuel supply motor to supply fuel at a preset fuel supply start frequency, and controls the oil temperature stirring motor to stir at a preset stirring start frequency; Step S3: Detect the fuel supply pressure of the pipeline through the inlet oil pressure sensor, and send the detected result of the inlet oil pressure to the control module. The control module adjusts the rotation speed of the fuel supply motor through the frequency converter according to the detected result of the inlet oil pressure to adjust the fuel supply pressure; Step S4: Detect the oil temperature of the fuel supply area through the oil sump oil temperature sensor, and send the detected result of the oil temperature to the control module. The control module determines whether the oil temperature of the oil sump detected by the oil sump oil temperature sensor is between the first temperature threshold and the second temperature threshold; Step S5: If so, return to Step S4; if not, the control module sequentially determines whether the spindle return oil temperature detected by the spindle return oil temperature sensor, the spider hand return oil temperature detected by the spider hand return oil temperature sensor, the first brand box return oil temperature detected by the first brand box return oil temperature sensor, the second brand box return oil temperature detected by the second brand box return oil temperature sensor, and the spiral return stem and chopper disk return oil temperature detected by the spiral return stem and chopper disk return oil temperature sensor are less than the first temperature threshold or greater than the second temperature threshold, and records the data; Step S6: The control module determines whether the oil temperature of the oil sump detected by the oil sump oil temperature sensor is less than the first temperature threshold or greater than the second temperature threshold; Step S7: According to the magnitude relationship between the oil sump oil temperature and the first temperature threshold or the second temperature threshold, select the lowest or highest item among the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, and the spiral return stem and chopper disk return oil temperature as the reference temperature. The control module adjusts the rotation speed of the oil sump stirring motor through the frequency converter, and the controller controls the semiconductor refrigerator to heat or cool to the regulated temperature according to the reference temperature.

2. The constant temperature control method for fuel supply of a cigarette making machine according to claim 1, wherein The control module uses a PLC controller, has a Profibus port, and is connected to the frequency converters of the fuel supply motor, the oil temperature stirring motor, and the constant temperature circulation motor through the Profibus port to control the speed regulation operation of the fuel supply motor, the oil temperature stirring motor, and the constant temperature circulation motor in a bus mode.

3. The cigarette making machine fuel supply constant temperature control method according to claim 1, characterized in that, The cigarette machine fuel supply constant temperature control system further includes an input / output module, which is respectively connected to the fuel supply unit, the oil temperature outlet detection unit, the constant temperature circulation unit, and the control module, The input / output module includes an analog input module, an analog output module, a digital input module, and a digital output module, where: The analog input module is respectively connected to the oil sump liquid level sensor, the oil sump oil temperature sensor, the inlet oil pressure sensor, the spindle return oil temperature sensor, the spider hand return oil temperature sensor, the first brand box return oil temperature sensor, the second brand box return oil temperature sensor, the spiral return stem and the splitting knife disc return oil temperature sensor, the condensation temperature sensor and the circulating pipeline return oil temperature sensor, and is used to collect the voltage signals of 0 to 10V of each sensor, and convert the voltage signals into data signals of 0 to 32000, so as to provide the data signals to the control module for data calculation; The analog output module is used to convert the data calculated by the control module into voltage signals of 0 to 10V, and control the temperature of the semiconductor refrigerator through the current regulation control module; The digital input module is used to collect the operation signals of the auxiliary drive of the cigarette machine; The digital output module is used to control the temperature inversion of the semiconductor refrigerator and the operation of the axial flow fan.

4. The constant temperature control method for oil supply of a cigarette making machine according to claim 1, wherein The cigarette machine oil supply constant temperature control system further includes a human-machine interaction module, which is used to real-time feedback the control situation of the overall oil temperature through a curve graph and reflect the alarm information in the oil temperature control.

5. The constant temperature control method for fuel supply of a cigarette making machine according to claim 1, characterized in that, In the step S3, the control module adjusts the speed of the oil supply motor through the frequency converter according to the detected result of the inlet oil pressure to adjust the oil supply pressure, specifically including: If the inlet oil pressure is less than the first preset pressure threshold, the frequency of the oil supply motor is increased by the first preset amplitude through the frequency converter, so as to increase the speed of the oil supply motor by the first preset amplitude; If the inlet oil pressure is greater than or equal to the second preset pressure threshold, the frequency of the oil supply motor is decreased by the second preset amplitude through the frequency converter, so as to decrease the speed of the oil supply motor by the second preset amplitude; If the inlet oil pressure is between the second preset pressure threshold and the second preset pressure threshold, the frequency of the oil supply motor remains constant; After a preset time, return to the step of judging the inlet oil pressure.

6. The constant temperature control method for fuel supply of a cigarette making machine according to claim 1, characterized in that In the step S5, the control module sequentially judges whether the spindle return oil temperature detected by the spindle return oil temperature sensor, the spider hand return oil temperature detected by the spider hand return oil temperature sensor, the first brand box return oil temperature detected by the first brand box return oil temperature sensor, the second brand box return oil temperature detected by the second brand box return oil temperature sensor, and the spiral return stem and the splitting knife disc return oil temperature detected by the spiral return stem and the splitting knife disc return oil temperature sensor are less than the first temperature threshold or greater than the second temperature threshold, and records the data, specifically including: Record the current oil sump oil temperature through register 0 inside the control module, if the oil sump oil temperature is greater than the second temperature threshold or less than the first temperature threshold; Then gradually judge whether the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, and the spiral return stem and the splitting knife disc return oil temperature are greater than the second temperature threshold or less than the first temperature threshold, and record the corresponding return oil temperatures in register 1, register 2, register 3, register 4 and register 5 inside the control module respectively.

7. The constant temperature control method for fuel supply of a cigarette making machine according to claim 6, characterized in that, When the oil sump oil temperature is less than the first temperature threshold, in step S7, according to the magnitude relationship between the oil sump oil temperature and the first temperature threshold or the second temperature threshold, the lowest or highest value among the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, the spiral return stem and the splicer return oil temperature is selected as the reference temperature. The control module adjusts the speed of the oil sump stirring motor through the frequency converter, and the controller controls the semiconductor cooler to heat or cool to the regulated temperature according to the reference temperature. Specifically, it includes: Step S71: If the oil sump oil temperature is less than the first temperature threshold, select the lowest value among the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, the spiral return stem and the splicer return oil temperature as the reference temperature; Step S72: The control module increases the speed of the oil sump stirring motor through the frequency converter; Step S73: The controller controls the semiconductor cooler to heat to the regulated temperature according to the reference temperature; Step S74: The constant temperature circulation motor runs at a constant frequency of 20 Hz; Step S75: Judge whether the oil temperature in the circulation pipeline is between the first temperature threshold and the second temperature threshold. If not, make up for the difference between the heating temperature and the temperature of the circulation pipeline, and return to step S73.

8. The constant temperature control method for oil supply of a cigarette making machine according to claim 7, characterized in that, In step S71, the step of selecting the lowest value among the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, the spiral return stem and the splicer return oil temperature as the reference temperature specifically includes: Compare the temperature data in registers 1-5, and take the smallest temperature as the reference value Tda; In step S73, the step that the controller controls the semiconductor cooler to heat to the regulated temperature specifically includes: Calculate the temperature heating point to be reached through the following formula: where Tam represents the normal constant temperature, Tda represents the reference temperature, Tmax represents the second temperature threshold, Tmin represents the first temperature threshold, Tou represents the return oil temperature of the circulation pipeline, Tin represents the temperature of the semiconductor cooler, and To represents the temperature heating point to be reached; The semiconductor cooler performs heating work, and the temperature heating regulation is carried out through the following formula: where kp represents the proportionality coefficient from the high temperature to the low temperature range, Ti represents the response time coefficient approaching the low temperature range, and Td represents the pre-regulation time coefficient approaching the low temperature range.

9. The constant temperature control method for oil supply of a cigarette making machine according to claim 6, wherein, When the oil sump oil temperature is greater than the second temperature threshold, in step S7, according to the magnitude relationship between the oil sump oil temperature and the first temperature threshold or the second temperature threshold, the lowest or highest value among the spindle return oil temperature, the spider hand return oil temperature, the first brand box return oil temperature, the second brand box return oil temperature, the spiral return stem and the splicer return oil temperature is selected as the reference temperature. The control module adjusts the speed of the oil sump stirring motor through the frequency converter, and the controller controls the semiconductor cooler to heat or cool to the regulated temperature according to the reference temperature. Specifically, it includes: Step S71-1: If the oil sump oil temperature is greater than the second temperature threshold, select the highest value among the spindle oil return temperature, the spider hand oil return temperature, the first brand box oil return temperature, the second brand box oil return temperature, the spiral re-stemming and the splitter plate oil return temperature as the reference temperature; Step S72-1: The control module determines whether the difference between the reference temperature and the second temperature threshold is greater than the preset temperature difference threshold. If so, the control module reduces the speed of the oil sump stirring motor through the frequency converter; Step S73-1: The controller controls the semiconductor cooler to refrigerate to the regulated temperature according to the reference temperature; Step S74-1: The constant temperature circulation motor operates at a constant frequency of 30Hz, and for every 1°C increase in the oil sump oil temperature, the frequency increases by 1Hz. If the oil sump oil temperature exceeds the third temperature threshold, it operates at the highest frequency; Step S75-1: Determine whether the oil temperature in the circulation pipeline is between the first temperature threshold and the second temperature threshold. If not, make up for the temperature difference between the refrigeration temperature and the temperature of the circulation pipeline, and return to Step S73-1; Among them, in the case where the oil sump oil temperature is greater than the second temperature threshold, the Step S71-1, selecting the highest value among the spindle oil return temperature, the spider hand oil return temperature, the first brand box oil return temperature, the second brand box oil return temperature, the spiral re-stemming and the splitter plate oil return temperature as the reference temperature, specifically includes: Compare the temperature data in registers 1 to 5, and take the largest temperature data as the reference value Tda; The Step S73-1, the controller controls the semiconductor cooler to refrigerate to the regulated temperature according to the reference temperature, specifically includes: Calculate the temperature refrigeration point to be reached through the following formula; Among them, Tam represents the normal constant temperature, Tda represents the reference temperature, Tmax represents the second temperature threshold, Tmin represents the first temperature threshold, Tou represents the oil return temperature of the circulation pipeline, Tin represents the temperature of the semiconductor cooler, and To represents the temperature refrigeration point to be reached; The semiconductor cooler performs refrigeration work and conducts temperature refrigeration regulation through the following formula; Among them, kp represents the proportionality coefficient in the range from high temperature to low temperature, Ti represents the response time coefficient approaching the low temperature range, and Td represents the pre-regulation time coefficient approaching the low temperature range; The Step S74-1, the constant temperature circulation motor operates at a constant frequency of 30Hz, and for every 1°C increase in the oil sump oil temperature, the frequency increases by 1Hz. If the oil sump oil temperature exceeds the third temperature threshold, it operates at the highest frequency, specifically includes: The constant temperature circulation motor operates at a reference frequency of 30Hz. Take the difference obtained by subtracting the second temperature threshold from the reference temperature Tda as the number of Hertz for the frequency increase of the constant temperature circulation motor. When the oil sump oil temperature is greater than or equal to 65°C, the constant temperature circulation motor operates at the highest frequency. When the feedback oil return temperature of the circulation pipeline reaches the constant temperature range, after a 5s delay, re-conduct temperature acquisition and regulation.

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