Automatic control method and system for constant temperature oil pressing

Abstract

The application discloses a kind of constant temperature oil pressing automatic control methods, by being divided into multiple pressing areas by pressing chamber compression space size, and the first temperature data of each pressing area is monitored respectively.When the temperature of all pressing areas is within the respective preset threshold range, further calculate the temperature difference data between each pressing area, and judge whether these temperature differences are within the preset temperature difference threshold.If there is temperature difference data that exceeds the temperature difference range, a first warning signal is triggered;if the temperature of a certain pressing area exceeds the upper limit, send a command to the cooling device to cool down the pressing area;if it is lower than the lower limit, a signal is sent to the heating device to raise the temperature of the pressing area.The application calculates the temperature difference data set from the second temperature data obtained within the preset time, which can assess whether the temperature gradient between each area in the pressing chamber is reasonable.If the temperature difference is too large, it may mean that the heat distribution is uneven, and the equipment has potential faults.The application also discloses a constant temperature oil pressing automatic control system.

Description

Technical Field

[0001] This invention relates to the field of oil press chamber temperature control technology, and in particular to an automatic control method and system for constant temperature oil pressing. Background Technology

[0002] An oil press is a common oil extraction device widely used in vegetable oil production. The pressing chamber is the main working part of the oil press, consisting of a screw shaft and a cylindrical pressing cage. The function of the pressing chamber is to press the material, extracting the oil. During the oil pressing process, temperature changes within the pressing chamber can affect the oil yield and oil quality. Temperatures that are too low or too high will reduce the friction between the material fragments, preventing the formation of optimal pressure within the pressing chamber and affecting the oil yield. If the temperature is too low, the viscosity of the vegetable oil will decrease significantly, resulting in poor fluidity and difficulty in oil extraction; if the temperature is too high, the material fragments will be scorched, preventing the cake from being discharged smoothly, potentially causing the pressing chamber to jam, leading to downtime, increased losses, and reduced production efficiency. To ensure the pressing chamber reaches the optimal temperature and shorten the start-up time, [further measures are taken].

[0003] In existing technology, a temperature sensor is simply used to monitor the temperature inside the pressing chamber. When the temperature inside the pressing chamber is lower than the set temperature, the electric heating element starts to heat the pressing chamber, and the cooling system stops. When the temperature inside the pressing chamber reaches the set temperature, the electric heating element automatically stops working, and the cooling system starts. This cycle repeats to maintain a constant temperature inside the pressing chamber.

[0004] However, in the actual oil pressing process, the temperature in different areas of the pressing chamber is not entirely the same. Generally speaking, the temperature in the area near the feed inlet is relatively low because this is where the newly entered material is pressed, the material itself is at a lower temperature, and the pressure in this area is also lower. The temperature in the area near the discharge outlet, on the other hand, may be higher because the material has already been pressed for a longer period and the oil has been extracted. Therefore, simply using a single temperature sensor to monitor the temperature inside the pressing chamber cannot fully reflect the overall temperature situation. Furthermore, if there are other abnormalities inside the pressing chamber, simply maintaining a constant temperature may not detect them. When abnormalities exist within the pressing chamber, even if the temperatures in other areas of the chamber are normal, it may still affect oil pressing efficiency, oil quality, and may even lead to equipment damage. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides an automatic control method and system for constant temperature oil pressing.

[0006] The technical solution adopted in this invention is:

[0007] In a first aspect, this application provides an automatic control method for constant temperature oil pressing, comprising the following:

[0008] The pressing chamber is divided into different pressing zones according to the size of the compression space volume at each stage;

[0009] Obtain the initial temperature data for each pressing zone;

[0010] Determine whether the first temperature data of each pressing zone is within the corresponding preset temperature threshold range;

[0011] If the first temperature data of each pressing zone is within the corresponding preset temperature threshold range, then the second temperature data of each pressing zone within a preset time period is obtained.

[0012] By comparing the second temperature data of each pressing area, multiple temperature difference data are obtained, and a temperature difference dataset is established based on the multiple temperature difference data.

[0013] Determine whether all temperature differences in the temperature difference dataset are within a preset temperature difference threshold range; if any temperature difference in the temperature difference dataset is outside the preset temperature difference threshold range, then send a first warning signal.

[0014] If the first temperature data of at least one pressing area is greater than the upper limit of the corresponding preset temperature threshold range, a first execution signal is sent to the cooling device to cool down the pressing area. If the first temperature data of at least one pressing area is less than the lower limit of the corresponding preset temperature threshold range, a second execution signal is sent to the heating device to heat up the pressing area.

[0015] Secondly, this application provides an automatic control system for constant temperature oil pressing, comprising:

[0016] A division module, which is used to divide the pressing chamber into different pressing zones according to the size of the compression space volume at each stage;

[0017] The data acquisition module is used to acquire the first temperature data and the second temperature data of each pressing zone and send them to the control module and the storage module.

[0018] The storage module is used to store the preset temperature threshold range, the preset temperature difference threshold range, and the first temperature data;

[0019] The control module is used to determine whether the first temperature data of each pressing area is within the corresponding preset temperature threshold range; if the first temperature data of each pressing area is within the corresponding preset temperature threshold range, the second temperature data of each pressing area is compared to obtain multiple temperature difference data, and a temperature difference dataset is established based on the multiple temperature difference data.

[0020] Determine whether all temperature differences in the temperature difference dataset are within a preset temperature difference threshold range; if any temperature difference in the temperature difference dataset is outside the preset temperature difference threshold range, then send a first warning signal.

[0021] If the first temperature data of at least one pressing area is greater than the upper limit of the corresponding preset temperature threshold range, a first execution signal is sent to the cooling device to cool down the pressing area. If the first temperature data of at least one pressing area is less than the lower limit of the corresponding preset temperature threshold range, a second execution signal is sent to the heating device to heat up the pressing area.

[0022] The early warning module is used to receive a first early warning signal and issue a warning based on the first early warning signal;

[0023] A cooling device is used to receive a first execution signal and cool the pressing area based on the first execution signal.

[0024] A heating device is provided for receiving a second execution signal and heating the pressing area based on the second execution signal.

[0025] The beneficial effects of the present invention are at least one of the following:

[0026] Based on the compression space volume at each stage within the pressing chamber, the pressing chamber is divided into multiple pressing zones, and a preset temperature threshold is set for each zone. This ensures that the physical compression process at each stage receives optimal temperature support, thereby improving oil extraction efficiency. By monitoring and recording the initial temperature data of each zone, abnormal temperature conditions can be detected promptly. When the temperature exceeds the preset range, an execution signal is sent to the cooling or heating device for adjustment, ensuring that the equipment always operates within the normal temperature range. This effectively avoids oil quality degradation and equipment damage due to overheating, and also prevents insufficient oil extraction due to excessively low temperatures. By calculating the temperature difference dataset from the second temperature data acquired within a preset time period, the rationality of the temperature gradient between zones within the pressing chamber can be assessed. If the temperature difference is too large, it may indicate uneven heat distribution and potential equipment malfunction.

[0027] Monitoring pressure changes after temperature control allows for more accurate identification of internal equipment abnormalities, preventing misjudgments that may arise from relying solely on temperature data and improving the overall stability and reliability of the control system. Furthermore, comparing the consistency between pressure and temperature changes provides a better assessment of equipment performance and the effectiveness of the oil extraction process. Attached Figure Description

[0028] Figure 1 This is a flowchart of the method according to Embodiment 1 of the present invention;

[0029] Figure 2 This is a flowchart of the method in Embodiment 2 of the present invention;

[0030] Figure 3 This is a flowchart of the method in Embodiment 3 of the present invention;

[0031] Figure 4 This is a system block diagram of Embodiment 5 of the present invention. Detailed Implementation

[0032] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] Example 1:

[0034] like Figure 1 As shown, this application provides an automatic control method for constant temperature oil pressing, including the following steps:

[0035] S1, divide the pressing chamber into different pressing zones according to the size of the compression space volume at each stage. Execute S2.

[0036] It should be noted that during the operation of the oil press, the material (such as peanuts, soybeans, etc.) undergoes gradual physical compression as it passes through the pressing chamber to extract the oil. The state and compressibility of the oil inside the material differ at different stages. Initially, the material is relatively loose and requires a larger space for preliminary compaction. As the compression progresses, the material density increases, and further pressing requires a smaller space to apply higher pressure. In this embodiment, the screw is arranged in four stages, and the volume ratio of the compression space at each stage of the precisely designed pressing chamber is 48:15:10:7. The pressing chamber is divided into a first pressing zone, a second pressing zone, a third pressing zone, and a fourth pressing zone, which efficiently distributes the pressing force at each stage, which is conducive to the extraction of oil, smoother oil flow, increased oil yield, and reduced residual oil rate in the cake.

[0037] S2, obtain the first temperature data for each pressing zone. Execute S3.

[0038] Because the volume ratios of the compression spaces at different stages of the pressing chamber are different, the pressure at each stage also varies during material compression. In the actual oil pressing process, pressure and temperature interact. When the pressure inside the pressing chamber increases, factors such as friction, compression heat effect, and changes in the internal structure of the material lead to a rise in temperature. In higher-pressure areas, the efficiency of converting mechanical energy into heat energy is higher, and the material is subjected to stronger compression, resulting in even higher temperatures. In lower-pressure areas, the material experiences less pressure, generating relatively less heat, and thus the temperature is lower. Therefore, the temperatures in different pressing zones within the pressing chamber vary.

[0039] Therefore, in one possible implementation, temperature sensors (such as thermocouples, infrared thermometers, etc.) can be installed in each pressing area to monitor and record the first temperature data of each area in real time.

[0040] S3, determine whether the first temperature data of each pressing zone is within the corresponding preset temperature threshold range.

[0041] Specifically, different preset temperature threshold ranges are set according to the type of oilseed. These preset temperature threshold ranges include both upper and lower preset temperature data. Different pressing zones can have different preset temperature threshold ranges.

[0042] First pressing zone (larger compression space): Since the material is relatively loose at the beginning, it is mainly for preliminary compaction and heating. The preset temperature range can be set from a low starting temperature to a suitable initial extrusion temperature, such as 60℃ to 90℃.

[0043] Second pressing zone (medium compression space): As the material density increases, the temperature needs to be appropriately increased to facilitate oil flow. The preset temperature range for this zone may be set from 80°C to 120°C.

[0044] The third pressing zone (smaller compression space, higher pressure): This stage requires higher temperatures to overcome the internal resistance caused by the higher pressure and promote further oil extraction. Its preset temperature range can be 110℃ to 140℃.

[0045] Fourth pressing zone (minimum compression space, maximum pressure): In the final stage, to squeeze out as much residual oil as possible, temperature control needs to be very precise. It is necessary to avoid overheating that would degrade the oil quality, while ensuring that the oil is fully extracted. Therefore, the preset temperature range for the fourth pressing zone may be set between 130°C and 150°C.

[0046] If the first temperature data of each pressing zone is within the corresponding preset temperature threshold range, then execute S4;

[0047] If the first temperature data of at least one pressing zone is greater than the upper limit of the corresponding preset temperature threshold range, then execute S7.

[0048] If the first temperature data of at least one pressing zone is less than the lower limit of the corresponding preset temperature threshold range, then execute S8.

[0049] S4: Obtain the second temperature data of each pressing zone within a preset time period, compare the second temperature data of each pressing zone within the preset time period to obtain multiple temperature difference data, and establish a temperature difference dataset based on the multiple temperature difference data. Execute S5.

[0050] It should be noted that as the oil press runs for a period of time, during the oil pressing process, heat is indeed transferred between different pressing zones as the material is gradually compressed and propelled within the pressing chamber. Ideally, to ensure efficient and uniform oil extraction and maintain stable oil quality, the temperature of each pressing zone should gradually increase according to a certain gradient, so that the temperature difference is maintained within a suitable range.

[0051] The specific value of the preset time can be determined through multiple experiments and optimizations based on factors such as the actual performance of the oil press, the type of material, and the process conditions. For example, it can be set to collect the second temperature data of each pressing zone after the oil press has been running for 20 or 30 minutes. The second temperature data of each pressing zone are subtracted from each other to obtain multiple temperature difference data. The temperature difference data are then collected to form a temperature difference dataset.

[0052] S5, determine whether the temperature difference values ​​in the temperature difference data set are all within the preset temperature difference threshold range.

[0053] If there are temperature difference values ​​in the temperature difference dataset that fall within the preset temperature difference threshold range, in one possible implementation, return to execute S2 for loop determination.

[0054] For example: Suppose that in the above temperature acquisition and temperature difference calculation process, the following temperature difference threshold range is preset: 10℃ to 30℃.

[0055] After continuous monitoring for a period of time, the collected temperature difference dataset may include the following data points (taking a certain moment as an example):

[0056] The temperature difference between the first and second pressing zones is 23℃, the temperature difference between the second and third pressing zones is 28℃, and the temperature difference between the third and fourth pressing zones is 22℃.

[0057] At this point, a judgment is made based on the preset temperature difference threshold range:

[0058] The temperature difference of 23℃ between the first and second pressing zones is within the range of 10℃ to 30℃, which meets the requirements. The temperature difference of 28℃ between the second and third pressing zones is also within the range of 10℃ to 30℃, which also meets the requirements. The temperature difference of 22℃ between the third and fourth pressing zones is also within the range of 10℃ to 30℃, which also meets the requirements.

[0059] If all temperature difference data are within the preset temperature difference threshold range, it indicates that the current temperature gradient control is reasonable and the equipment is operating normally.

[0060] If any temperature difference in the temperature difference dataset is outside the preset temperature difference threshold range, then execute S6.

[0061] For example, after continuous monitoring for a period of time, the collected temperature difference dataset may include the following data points (taking a certain moment as an example):

[0062] The temperature difference between the second and third pressing zones is 38℃, which is outside the range of 10℃ to 30℃. This indicates that the heat transfer or distribution between the second and third pressing zones is not uniform, which may mean that there is an abnormality in the equipment operation. For example, the screw or other mechanical parts may be worn or malfunctioning. During the process of the material passing through the pressing chamber, the feeding speed may be unstable or the material distribution may be uneven.

[0063] S6, send the first warning signal.

[0064] Sending a first warning signal can remind operators to conduct further inspections to ensure the stability of the oil extraction process and product quality.

[0065] S7, send a first execution signal to the cooling device so that the cooling device cools down the pressing area.

[0066] The cooling device can be a common water circulation system, which forms closed loops around different pressing zones in the pressing chamber by installing water pipes. When it is necessary to cool down a certain pressing zone, the cooling efficiency can be improved by increasing the water flow rate, lowering the water temperature, or other methods.

[0067] S8, send a second execution signal to the heating device to heat the pressing area.

[0068] The heating device can be multiple 0.75kW electric heating tubes, which are installed on the lower pressing cage according to the corresponding pressing areas.

[0069] In this embodiment, the pressing chamber is divided into four pressing zones (first to fourth pressing zones) based on the volume of each compression space within the pressing chamber. A preset temperature threshold range is set for each zone, adapted to its physical state and the compressibility of the oil. Temperature sensors, such as thermocouples or infrared thermometers, are installed in each pressing zone to continuously monitor the first temperature data and the second temperature data within a preset time period. The temperature difference between the pressing zones is calculated based on the second temperature data, and the acquired first temperature data is compared with the preset temperature threshold range. If the temperature of a zone exceeds its corresponding preset upper or lower limit, the system will perform corresponding operations based on the specific situation: if it is higher than the upper limit, a first execution signal is sent to the cooling device to start cooling; if it is lower than the lower limit, a second execution signal is sent to the heating device to start heating; if the temperature difference exceeds the preset temperature difference threshold range, the system will send a first warning signal to alert the operator that there may be an abnormal heat transfer problem.

[0070] By continuously monitoring, comparing, and adjusting the temperature of each pressing zone, the temperature gradient is kept within a preset range throughout the oil pressing process, thereby optimizing the oil extraction efficiency and quality, while effectively protecting the equipment from overheating or overcooling damage.

[0071] Example 2:

[0072] like Figure 2 As shown, considering that pressure, in addition to temperature, is also an important parameter affecting the oil extraction effect and the safe operation of the equipment, S6 in Example 1, determining whether the temperature difference values ​​in the temperature difference data set are all within the preset temperature difference threshold range, further includes:

[0073] If all temperature differences in the temperature difference dataset are within the preset temperature difference threshold range, then execute S9.

[0074] S9: Obtain the first pressure data for each pressing zone. Execute S10.

[0075] S10, determine whether the first pressure data is within the preset pressure threshold range.

[0076] If the first pressure data is not within the preset pressure threshold range, then execute S11. Otherwise, return to execute S9.

[0077] S11, send the second warning message.

[0078] In this embodiment, temperature control is one of the important factors in ensuring effective oil extraction and maintaining product quality, while pressure is also an equally important parameter. When the temperature difference between each pressing zone is within the preset temperature difference threshold range, it indicates that the temperature gradient control of each pressing zone is reasonable, which is conducive to the uniform and efficient extraction of oil. However, even if the temperature of each pressing zone meets the preset conditions, it may be forcibly formed under the control of the heating and cooling devices, and does not necessarily indicate that the working state inside the pressing chamber is normal. If the pressure control inside the pressing chamber is problematic, it may also affect the final oil extraction effect and equipment safety. Therefore, by detecting pressure data and comparing it with the preset pressure threshold range, potential pressure anomalies can be detected in a timely manner.

[0079] Example 3:

[0080] like Figure 3 As shown, considering that it is unclear whether the equipment response is effective after performing cooling or heating operations, if the first temperature data of at least one pressing area is greater than the upper limit of the corresponding preset temperature threshold range, step S7, sending a first execution signal to the cooling device to make the cooling device cool down the pressing area includes the following sub-steps:

[0081] S7.1, Obtain the third temperature data for the corresponding pressing area;

[0082] S7.2 Send a first execution signal to the cooling device so that the cooling device cools down the pressing area.

[0083] S7.3, obtain the fourth temperature data for this pressing area.

[0084] S7.4 Determine whether the third temperature data is less than or equal to the fourth temperature data.

[0085] If the third temperature data is less than or equal to the fourth temperature data, then execute S7.5; otherwise, execute S7.1.

[0086] S7.5, send the third warning signal.

[0087] If the first temperature data of at least one pressing area is less than the lower limit of the corresponding preset temperature threshold range, S8, a second execution signal is sent to the heating device to cause the heating device to heat the pressing area, including the following sub-steps:

[0088] S8.1, obtain the fifth temperature data of the corresponding pressing area.

[0089] S8.2, Send a second execution signal to the heating device to heat the pressing area.

[0090] S8.3, obtain the sixth temperature data of this pressing area;

[0091] S8.4, determine whether the fifth temperature data is greater than or equal to the sixth temperature data.

[0092] If the fifth temperature data is greater than or equal to the sixth temperature data, then execute S8.5; otherwise, execute S8.1.

[0093] S8.5 sends the fourth warning signal.

[0094] In this embodiment, the first temperature data of each pressing zone is monitored in real time and compared with a preset temperature threshold range. When the temperature of a pressing zone exceeds the upper limit or falls below the lower limit, corresponding measures are taken. In the case of excessively high temperature, the third temperature data of the zone is first acquired (i.e., the instantaneous temperature before the cooling device is started), then a signal is sent to the cooling device to start cooling, and the fourth temperature data is acquired again after the cooling operation.

[0095] In cases where the temperature is too low, the fifth temperature data (the instantaneous temperature before heating is started) is obtained first, and then a signal is sent to the heating device to start heating. The sixth temperature data is obtained after heating.

[0096] Verify the temperature changes after performing cooling or heating operations by comparing the second temperature with the fourth temperature (or the fifth temperature with the sixth temperature) to determine the effectiveness of the cooling or heating. If the temperature does not decrease or increase as expected, it indicates a potential problem with the equipment, and a warning signal is sent to notify the operator.

[0097] Example 4:

[0098] Based on Embodiment 3, considering that even if the effectiveness of the heating or cooling device is verified by the temperature change before and after heating or cooling, it cannot be confirmed whether there is any abnormality in the pressing chamber after temperature control, therefore, if the first temperature data of at least one pressing area is greater than the upper limit of the corresponding preset temperature threshold range, after obtaining the third temperature data of the corresponding pressing area, the method further includes obtaining the second pressure data of the corresponding pressing area; sending a first execution signal to the cooling device to make the cooling device cool down the pressing area; after obtaining the fourth temperature data of the pressing area, the method further includes obtaining the third pressure data of the pressing area; determining whether the third temperature data is less than or equal to the fourth temperature data; if the third temperature data is greater than or equal to the fourth temperature data, comparing the second pressure data with the third pressure data; if the second pressure data is less than or equal to the third pressure data, sending a fifth warning signal.

[0099] If the first temperature data of at least one pressing area is less than the lower limit of the corresponding preset temperature threshold range, then after obtaining the fifth temperature data of the corresponding pressing area, the process further includes obtaining the fourth pressure data of the corresponding pressing area; sending a second execution signal to the cooling device to cause the heating device to heat the pressing area; after obtaining the sixth temperature data of the pressing area, the process further includes obtaining the fifth pressure data of the pressing area; determining whether the fifth temperature data is greater than or equal to the sixth temperature data; if the fifth temperature data is less than or equal to the sixth temperature data, then comparing the fourth pressure data with the fifth pressure data; if the fourth pressure data is greater than or equal to the fifth pressure data, then sending a fifth warning signal.

[0100] In this embodiment, based on the effective reduction of the pressing chamber temperature by the cooling device (i.e., the third temperature data is greater than or equal to the fourth temperature data), the second pressure data is compared with the third pressure data. Normally, as the pressing chamber temperature decreases, the pressure inside the pressing chamber also tends to decrease. Therefore, when the third temperature data is greater than or equal to the fourth temperature data (temperature decreases), but the second pressure data is less than or equal to the third pressure data (pressure does not decrease with temperature), a fourth warning signal is sent. Similarly, based on the effective increase of the pressing chamber temperature by the heating device (i.e., the fifth temperature data is less than or equal to the sixth temperature data), the fourth pressure data is compared with the fifth pressure data. Normally, as the pressing chamber temperature increases, the pressure inside the pressing chamber also tends to increase. Therefore, when the fifth temperature data is less than or equal to the sixth temperature data (temperature increases), but the fourth pressure data is greater than or equal to the fifth pressure data (pressure does not increase with temperature), a fifth warning signal is sent.

[0101] Example 5:

[0102] like Figure 4 As shown, an automatic control system for constant temperature oil pressing includes:

[0103] The dividing module is used to divide the pressing chamber into different pressing areas according to the size of the compression space volume at each level.

[0104] The data acquisition module is used to acquire the first temperature data and the second temperature data of each pressing area and send them to the control module and the storage module.

[0105] The storage module is used to store the preset temperature threshold range, the preset temperature difference threshold range, and the first temperature data.

[0106] The control module is used to determine whether the first temperature data of each pressing zone is within the corresponding preset temperature threshold range; if the first temperature data of each pressing zone is within the corresponding preset temperature threshold range, the second temperature data of each pressing zone is compared to obtain multiple temperature difference data, and a temperature difference dataset is established based on the multiple temperature difference data; it is determined whether the temperature difference values ​​in the temperature difference dataset are all within the preset temperature difference threshold range; if there is a temperature difference value in the temperature difference dataset outside the preset temperature difference threshold range, a first warning signal is sent; if the first temperature data of at least one pressing zone is greater than the upper limit of the corresponding preset temperature threshold range, a first execution signal is sent to the cooling device to cool down the pressing zone; if the first temperature data of at least one pressing zone is less than the lower limit of the corresponding preset temperature threshold range, a second execution signal is sent to the heating device to heat up the pressing zone.

[0107] The early warning module is used to receive a first early warning signal and issue a warning based on the first early warning signal.

[0108] A cooling device is used to receive a first execution signal and cool the pressing area based on the first execution signal.

[0109] A heating device is provided for receiving a second execution signal and heating the pressing area based on the second execution signal.

[0110] The data acquisition module is also used to obtain the first pressure data in each pressing area if the temperature difference values ​​in the temperature difference dataset are all within the preset temperature difference threshold range.

[0111] The control module is also used to determine whether the first pressure data is within a preset pressure threshold range. If the first pressure data is not within the preset pressure threshold range, a second warning message is sent.

[0112] The data acquisition module is also used to acquire the third temperature data of the corresponding pressing area when the first temperature data of at least one pressing area is greater than the corresponding preset temperature threshold range.

[0113] The data acquisition module is also used to acquire a fourth temperature data of the pressing area after the cooling device cools and lowers the temperature of the pressing area.

[0114] The control module is also used to determine whether the third temperature data is less than or equal to the fourth temperature data. If the third temperature data is less than or equal to the fourth temperature data, then a third warning signal is sent.

[0115] The data acquisition module is also used to acquire the fifth temperature data of the corresponding pressing area when the first temperature data of at least one pressing area is less than the lower limit of the corresponding preset temperature threshold range.

[0116] The data acquisition module is also used to acquire the sixth temperature data of the pressing area after the heating device heats the pressing area.

[0117] The control module is also used to determine whether the fifth temperature data is greater than or equal to the sixth temperature data. If the fifth temperature data is greater than or equal to the sixth temperature data, a fourth warning signal is sent.

[0118] The data acquisition module is also used to acquire the third temperature data and the second pressure data of the corresponding pressing area when the first temperature data of at least one pressing area is greater than the upper limit of the corresponding preset temperature threshold range;

[0119] The data acquisition module is also used to cool the pressing area in the cooling device and obtain the fourth temperature data and the third pressure data of the pressing area.

[0120] The control module is also used to determine whether the third temperature data is less than or equal to the fourth temperature data. If the third temperature data is greater than or equal to the fourth temperature data, the second pressure data is compared with the third pressure data. If the second pressure data is less than or equal to the third pressure data, a fifth warning signal is sent.

[0121] The data acquisition module is also used to acquire the fifth temperature data and the fourth pressure data of the corresponding pressing area when the first temperature data of at least one pressing area is less than the lower limit of the corresponding preset temperature threshold range.

[0122] The data acquisition module is also used to acquire the sixth temperature data and the fifth pressure data of the pressing area after the heating device heats the pressing area.

[0123] The control module is also used to determine whether the fifth temperature data is greater than or equal to the sixth temperature data. If the fifth temperature data is less than or equal to the sixth temperature data, the fourth pressure data is compared with the fifth pressure data. If the fourth pressure data is greater than or equal to the fifth pressure data, a fifth warning signal is sent.

[0124] The embodiments described above are merely illustrative of specific implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An automatic control method for constant temperature oil pressing, characterized in that, Includes the following: The pressing chamber is divided into different pressing zones according to the size of the compression space volume at each stage; Obtain the initial temperature data for each pressing zone; Determine whether the first temperature data of each pressing zone is within the corresponding preset temperature threshold range; If the first temperature data of each pressing zone is within the corresponding preset temperature threshold range, then the second temperature data of each pressing zone within a preset time period is obtained. By comparing the second temperature data of each pressing area, multiple temperature difference data are obtained, and a temperature difference dataset is established based on the multiple temperature difference data. Determine whether all temperature differences in the temperature difference dataset are within a preset temperature difference threshold range; If any temperature difference value in the temperature difference dataset is outside the preset temperature difference threshold range, a first warning signal will be sent. If the first temperature data of at least one pressing area is greater than the upper limit of the corresponding preset temperature threshold range, a first execution signal is sent to the cooling device to cool down the pressing area. If the first temperature data of at least one pressing area is less than the lower limit of the corresponding preset temperature threshold range, a second execution signal is sent to the heating device to heat up the pressing area. If the first temperature data of at least one pressing area is greater than the upper limit of the corresponding preset temperature threshold range, a first execution signal is sent to the cooling device to cause the cooling device to cool down the pressing area, including: If the first temperature data of at least one pressing area is greater than the upper limit of the corresponding preset temperature threshold range, then the third temperature data of the corresponding pressing area is obtained. A first execution signal is sent to the cooling device to cause the cooling device to cool and reduce the temperature of the pressing area; Obtain the fourth temperature data for this pressing area; Determine whether the third temperature data is less than or equal to the fourth temperature data; if the third temperature data is less than or equal to the fourth temperature data, then send a third warning signal. If the first temperature data of at least one pressing area is greater than the upper limit of the corresponding preset temperature threshold range, then after obtaining the third temperature data of the corresponding pressing area, the second pressure data of the corresponding pressing area is also obtained. Sending a first execution signal to the cooling device to cool the pressing area, and after obtaining the fourth temperature data of the pressing area, the method further includes obtaining the third pressure data of the pressing area. Determine whether the third temperature data is less than or equal to the fourth temperature data. If the third temperature data is greater than or equal to the fourth temperature data, then compare the second pressure data with the third pressure data. If the second pressure data is less than or equal to the third pressure data, then a fifth warning signal is sent.

2. The automatic control method for constant temperature oil pressing according to claim 1, characterized in that, Determining whether all temperature differences in the temperature difference dataset are within a preset temperature difference threshold range also includes: If the temperature difference values ​​in the temperature difference dataset are all within the preset temperature difference threshold range, then the first pressure data of each pressing area is obtained. Determine whether the first pressure data is within a preset pressure threshold range. If the first pressure data is not within the preset pressure threshold range, send a second warning message.

3. The automatic control method for constant temperature oil pressing according to claim 1, characterized in that, If the first temperature data of at least one pressing area is less than the lower limit of the corresponding preset temperature threshold range, a second execution signal is sent to the heating device to cause the heating device to heat the pressing area, including: If the first temperature data of at least one pressing zone is less than the lower limit of the corresponding preset temperature threshold range, then the fifth temperature data of the corresponding pressing zone is obtained. A second execution signal is sent to the heating device to cause the heating device to heat up the pressing area; Obtain the sixth temperature data for this pressing area; Determine whether the fifth temperature data is greater than or equal to the sixth temperature data. If the fifth temperature data is greater than or equal to the sixth temperature data, then send a fourth warning signal.

4. The automatic control method for constant temperature oil pressing according to claim 3, characterized in that, If the first temperature data of at least one pressing area is less than the lower limit of the corresponding preset temperature threshold range, then after obtaining the fifth temperature data of the corresponding pressing area, the fourth pressure data of the corresponding pressing area is also obtained. Sending a second execution signal to the heating device to heat the pressing area, and after obtaining the sixth temperature data of the pressing area, the method further includes obtaining the fifth pressure data of the pressing area; Determine whether the fifth temperature data is greater than or equal to the sixth temperature data. If the fifth temperature data is less than or equal to the sixth temperature data, then compare the fourth pressure data with the fifth pressure data. If the fourth pressure data is greater than or equal to the fifth pressure data, then a fifth warning signal will be sent.

5. An automatic control system for constant temperature oil pressing, characterized in that, include: A division module, which is used to divide the pressing chamber into different pressing zones according to the size of the compression space volume at each stage; The data acquisition module is used to acquire the first temperature data and the second temperature data of each pressing zone and send them to the control module and the storage module. The storage module is used to store the preset temperature threshold range, the preset temperature difference threshold range, and the first temperature data; The control module is used to determine whether the first temperature data of each pressing area is within the corresponding preset temperature threshold range; if the first temperature data of each pressing area is within the corresponding preset temperature threshold range, the second temperature data of each pressing area is compared to obtain multiple temperature difference data, and a temperature difference dataset is established based on the multiple temperature difference data. Determine whether all temperature differences in the temperature difference dataset are within a preset temperature difference threshold range; If any temperature difference value in the temperature difference dataset is outside the preset temperature difference threshold range, a first warning signal will be sent. If the first temperature data of at least one pressing area is greater than the upper limit of the corresponding preset temperature threshold range, a first execution signal is sent to the cooling device to cool down the pressing area. If the first temperature data of at least one pressing area is less than the lower limit of the corresponding preset temperature threshold range, a second execution signal is sent to the heating device to heat up the pressing area. The early warning module is used to receive a first early warning signal and issue a warning based on the first early warning signal; A cooling device is used to receive a first execution signal and cool the pressing area based on the first execution signal. A heating device is used to receive a second execution signal and heat the pressing area based on the second execution signal. The data acquisition module is also used to acquire the third temperature data of the corresponding pressing area when the first temperature data of at least one pressing area is greater than the corresponding preset temperature threshold range. The data acquisition module is also used to acquire a fourth temperature data of the pressing area after the cooling device cools and lowers the temperature of the pressing area. The control module is also used to determine whether the third temperature data is less than or equal to the fourth temperature data; if the third temperature data is less than or equal to the fourth temperature data, then a third warning signal is sent. The data acquisition module is also used to acquire the fifth temperature data of the corresponding pressing area when the first temperature data of at least one pressing area is less than the lower limit of the corresponding preset temperature threshold range. The data acquisition module is also used to acquire the sixth temperature data of the pressing area after the heating device heats the pressing area. The control module is also used to determine whether the fifth temperature data is greater than or equal to the sixth temperature data. If the fifth temperature data is greater than or equal to the sixth temperature data, a fourth warning signal is sent. The data acquisition module is also used to acquire the third temperature data and the second pressure data of the corresponding pressing area when the first temperature data of at least one pressing area is greater than the upper limit of the corresponding preset temperature threshold range; The data acquisition module is also used to acquire the fourth temperature data and the third pressure data of the pressing area after the cooling device cools and lowers the temperature of the pressing area; The control module is also used to determine whether the third temperature data is less than or equal to the fourth temperature data. If the third temperature data is greater than or equal to the fourth temperature data, the second pressure data is compared with the third pressure data. If the second pressure data is less than or equal to the third pressure data, a fifth warning signal is sent. The data acquisition module is also used to acquire the fifth temperature data and the fourth pressure data of the corresponding pressing area when the first temperature data of at least one pressing area is less than the lower limit of the corresponding preset temperature threshold range. The data acquisition module is also used to acquire the sixth temperature data and the fifth pressure data of the pressing area after the heating device heats the pressing area. The control module is also used to determine whether the fifth temperature data is greater than or equal to the sixth temperature data. If the fifth temperature data is less than or equal to the sixth temperature data, the fourth pressure data is compared with the fifth pressure data. If the fourth pressure data is greater than or equal to the fifth pressure data, a fifth warning signal is sent.

6. The constant temperature oil pressing automatic control system according to claim 5, characterized in that, The data acquisition module is also used to acquire the first pressure data in each pressing area if the temperature difference values ​​in the temperature difference dataset are all within the preset temperature difference threshold range. The control module is also used to determine whether the first pressure data is within a preset pressure threshold range. If the first pressure data is not within the preset pressure threshold range, a second warning message is sent.

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