Loosening and conditioning method for tobacco

Abstract

The application relates to the tobacco production technical field and discloses a tobacco loose conditioning method. The tobacco loose conditioning method comprises the following steps: setting a material spraying nozzle of a loose conditioning machine as a double-medium spraying nozzle; connecting one inlet of the double-medium spraying nozzle to a steam source through a first control valve and connecting the other inlet of the double-medium spraying nozzle to a water source through a second control valve; obtaining temperature measurement and moisture measurement of tobacco at an outlet of the loose conditioning machine; and adjusting the opening degrees of the first control valve and the second control valve based on the temperature measurement and the moisture measurement. The outlet feedback function is added, the steam-water mixed adding mode is adopted, the first control valve and the second control valve are adjusted in real time based on the detected moisture and temperature values at the outlet, the proportion and weight of the steam and the water added into the conditioning machine are controlled, and then the temperature and the moisture of the tobacco leaves at the outlet of the loose conditioning machine are ensured to be within a proper range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tobacco production, in particular to a tobacco loose conditioning method and a loose conditioning system. BACKGROUND

[0002] The moisture content of the tobacco leaf after redrying is generally in the range of 11-15%, if the tobacco material at this moisture value is directly input into the production line for processing, it is easy to cause phenomena such as crushing and dust raising, resulting in increased loss in the processing process. At present, in the tobacco primary processing production line, the tobacco after threshing and redrying and pre-pressing and packaging is generally unpacked and cut into sheet-shaped tobacco blocks, and then the sheet-shaped tobacco blocks are subjected to loose conditioning and moisture conditioning in the loose conditioning process. The low-moisture tobacco blocks are rolled up and down in the equipment cylinder, so that they are gradually loosened into single leaves under the multiple actions of humid process gas, so as to increase the moisture and temperature of the tobacco and avoid the generation of tobacco crushing in the subsequent production process.

[0003] However, the current loose conditioning machine generally uses steam nozzles to directly spray steam into the conditioning machine drum to carry out moisture conditioning on the tobacco therein, which cannot guarantee the moisture and temperature of the tobacco material after moisture conditioning, is not conducive to the subsequent process, and also cannot guarantee the quality of the produced tobacco. SUMMARY

[0004] The present application provides a tobacco loose conditioning method and a loose conditioning system to solve the problem that the existing loose conditioning machine cannot guarantee the moisture and temperature of the tobacco material after moisture conditioning.

[0005] In a first aspect, the present application provides a tobacco loose conditioning method for controlling the temperature and moisture of tobacco at the outlet of a loose conditioning machine, the tobacco loose conditioning method comprising:

[0006] The material spraying nozzle of the loose conditioning machine is set as a double-medium nozzle;

[0007] One of the inlets of the double-medium nozzle is connected to a steam source through a first control valve, and the other inlet of the double-medium nozzle is connected to a water source through a second control valve;

[0008] The temperature measurement value and the moisture measurement value of the tobacco at the outlet of the loose conditioning machine are obtained;

[0009] The opening degrees of the first control valve and the second control valve are adjusted based on the temperature measurement value and the moisture measurement value, respectively.

[0010] The application adds an outlet feedback function, and adopts a steam-water mixed adding mode. The moisture and temperature of the tobacco at the outlet of the loose conditioning machine are detected, and based on the detected moisture and temperature values at the outlet, the first control valve and the second control valve are adjusted in real time to control the proportion and weight of the steam and water added into the conditioning machine, so as to ensure that the temperature and moisture of the tobacco at the outlet of the loose conditioning machine are within a suitable range.

[0011] In a possible implementation of the first aspect, adjusting the opening degrees of the first control valve and the second control valve based on the temperature measurement value and the moisture measurement value respectively comprises:

[0012] obtaining a set moisture value and a set temperature value;

[0013] calculating a difference between the temperature measurement value and the set temperature value as a temperature difference value;

[0014] calculating a difference between the moisture measurement value and the set moisture value as a moisture difference value;

[0015] adjusting the opening degree of the first control valve and the opening degree of the second control valve based on the temperature difference value and the moisture difference value.

[0016] In a possible implementation of the first aspect, adjusting the opening degrees of the first control valve and the second control valve based on the temperature measurement value and the moisture measurement value respectively comprises:

[0017] obtaining a set moisture standard deviation value and a set temperature standard deviation value;

[0018] calculating a standard deviation of the temperature measurement value, and taking a difference between the standard deviation of the temperature measurement value and the set temperature standard deviation value as a temperature difference value;

[0019] calculating a standard deviation of the moisture measurement value, and taking a difference between the standard deviation of the moisture measurement value and the set moisture standard deviation value as a moisture difference value;

[0020] adjusting the opening degree of the first control valve and the opening degree of the second control valve based on the temperature difference value and the moisture difference value.

[0021] In a possible implementation of the first aspect, adjusting the opening degrees of the first control valve and the second control valve based on the temperature difference value and the moisture difference value comprises,

[0022] obtaining a temperature difference upper limit, a temperature difference lower limit, a moisture difference upper limit and a moisture difference lower limit respectively;

[0023] comparing the temperature difference value with the temperature difference upper limit and the temperature difference lower limit, and comparing the moisture difference value with the moisture difference lower limit and the moisture difference upper limit;

[0024] if the temperature difference value is greater than the temperature difference upper limit and the moisture difference value is between the moisture difference lower limit and the moisture difference upper limit, decreasing the opening degree of the first control valve;

[0025] If the temperature difference value is less than the temperature difference lower limit and the moisture difference value is between the moisture difference lower limit and the moisture difference upper limit, the opening of the first control valve is increased;

[0026] If the temperature difference value is between the temperature difference lower limit and the temperature difference upper limit and the moisture difference value is less than the moisture difference lower limit, the opening of the second control valve is increased;

[0027] If the temperature difference value is between the temperature difference lower limit and the temperature difference upper limit and the moisture difference value is greater than the moisture difference upper limit, the opening of the second control valve is decreased;

[0028] If the temperature difference value is less than the temperature difference lower limit and the moisture difference value is less than the moisture difference lower limit, the openings of the first control valve and the second control valve are simultaneously increased;

[0029] If the temperature difference value is greater than the temperature difference upper limit and the moisture difference value is greater than the moisture difference upper limit, the openings of the first control valve and the second control valve are simultaneously decreased;

[0030] If the temperature difference value is less than the temperature difference lower limit and the moisture difference value is greater than the moisture difference upper limit, the opening of the second control valve is decreased;

[0031] If the temperature difference value is greater than the temperature difference upper limit and the moisture difference value is less than the moisture difference lower limit, the opening of the second control valve is increased;

[0032] The temperature difference upper limit and the moisture difference upper limit are both greater than 0, and the temperature difference lower limit and the moisture difference lower limit are both less than 0.

[0033] In a possible implementation of the first aspect, a heating assembly for heating water delivered to the other inlet of the double-medium nozzle is further arranged, and the tobacco loose rehydration method further comprises:

[0034] When the temperature difference value is less than the temperature difference lower limit and the moisture difference value is greater than the moisture difference upper limit, the heating assembly is controlled to heat the heating assembly while the opening of the second control valve is decreased.

[0035] In a possible implementation of the first aspect, the first control valve is a pneumatic diaphragm valve.

[0036] In a second aspect, an embodiment of the present application provides a loose rehydration system, which comprises a loose rehydration machine, the nozzle of the loose rehydration machine is a double-medium nozzle, and the loose rehydration system further comprises:

[0037] a steam pipeline, one end of which is connected with one inlet of the double-medium nozzle, and the other end of which is connected with a steam source, and the steam pipeline is provided with a first control valve;

[0038] a water delivery pipeline, one end of which is connected with the other inlet of the double-medium nozzle, and the other end of which is connected with a water source, and the water delivery pipeline is provided with a second control valve;

[0039] A moisture detector is arranged at the outlet of the loose conditioning machine to detect the moisture of the tobacco at the outlet of the loose conditioning machine.

[0040] A temperature detector is arranged at the outlet of the loose conditioning machine to detect the temperature of the tobacco at the outlet of the loose conditioning machine.

[0041] A control module is connected with the moisture detector, the temperature detector, the first control valve and the second control valve respectively, and is configured to adjust the opening degrees of the first control valve and the second control valve according to the output data of the moisture detector and the temperature detector.

[0042] In a possible implementation of the first aspect, the loose conditioning system further includes:

[0043] A flow meter is arranged on the water conveying pipeline and is connected with the control module, and is configured to detect the water flow in the water conveying pipeline.

[0044] A heating unit is arranged at the water source and is connected with the control module, and is configured to heat the water of the water source.

[0045] In a possible implementation of the first aspect, along the flow direction of the steam, the steam source, the first control valve, a stop valve, a filter and a pressure reducing valve are arranged in sequence.

[0046] In a possible implementation of the first aspect, the first control valve is a pneumatic diaphragm valve. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 According to some embodiments of the present application, a flowchart of a tobacco loose conditioning method is shown;

[0048] Figure 2 According to some embodiments of the present application, a structural diagram of a loose conditioning system is shown. DETAILED DESCRIPTION

[0049] The present application will be further described below in conjunction with specific embodiments and drawings. It can be understood that the illustrative embodiments of the present disclosure include but are not limited to a tobacco loose conditioning method and a loose conditioning system, and the specific embodiments described herein are only for the purpose of explaining the present application, but not limiting the present application. In addition, for the purpose of description, only the parts related to the present application are shown in the drawings, but not all the structures or processes.

[0050] The present application will be described with reference to particular embodiments of the application and procedures for carrying out the application. Other advantages and benefits of the present application will become apparent to those of ordinary skill in the art upon reading and understanding the following detailed description of the application. While the description of the application will focus on preferred embodiments, it is understood that the application should not be limited to these embodiments. On the contrary, the intent is to cover all alternatives, modifications, and equivalents falling within the scope of the claims based on the present application. In order to provide a thorough understanding of the present application, numerous specific details about the preferred embodiments are included. The present application can be practiced without these details. In addition, well known or commonly used structures and techniques have not been described in detail in order not to unnecessarily obscure the disclosure. It is intended that the embodiments and features of the application described herein can be combined with each other, where not in contradiction.

[0051] Reference Figure 1 In one embodiment of the present application, the loose conditioning method of tobacco comprises:

[0052] Step S101: setting the spray nozzle of the loose conditioning machine as a double medium spray nozzle, connecting one inlet of the double medium spray nozzle to the steam source through the first control valve, and connecting the other inlet of the double medium spray nozzle to the water source through the second control valve.

[0053] Step S102: obtaining the temperature measurement and moisture measurement of the tobacco at the outlet of the loose conditioning machine.

[0054] Step S103: adjusting the opening degree of the first control valve and the second control valve based on the temperature measurement and the moisture measurement, respectively.

[0055] Specifically, the loose conditioning machine of TB-L flex type can be used for loose conditioning treatment of tobacco, and a steam-water mixed spray nozzle (i.e. a double medium spray nozzle) is installed at the outlet of the loose conditioning machine of TB-L flex type, wherein the steam in the steam source enters one inlet of the steam-water mixed spray nozzle through a stop valve, a filter, a pressure reducing valve and a first control valve (such as a pneumatic diaphragm valve) in sequence, the process water enters the other inlet of the steam-water mixed spray nozzle through a heated water tank and a flow meter in sequence, and the steam and the process water are mixed at the steam-water mixed spray nozzle, so that the process water is uniformly sprayed on the tobacco sheet by steam entrainment, thereby realizing the conditioning of tobacco.

[0056] Specifically, if the spray nozzle is blocked, the pressure between the flow meter and the spray nozzle will be very large, which may cause damage to the flow meter. Therefore, in order to protect the flow meter and balance the pressure, an overflow valve can be added between the flow meter and the spray nozzle, so that when the spray nozzle is blocked, the overflow valve is used to prevent damage to the flow meter before the pressure returns to the flow meter.

[0057] Further, the amount of process water and steam sprayed on the tobacco sheet is determined by the TB-L flex type loose conditioning machine outlet moisture detector and temperature detector. In order to ensure normal injection of process water, the amount of steam and the amount of process water can be set in a fixed ratio to prevent process water from not being normally injected and dripping on the tobacco sheet due to insufficient steam. Specifically, the fixed ratio can be obtained by testing according to the selection and structure of the water supply pipeline, steam pipeline and nozzle.

[0058] The present application can adjust the amount of process water and steam according to various control modes, including:

[0059] Control outlet tobacco sheet moisture deviation mode: the opening degree of the pneumatic diaphragm valve is the minimum opening degree for normal water atomization, and then the water amount is adjusted according to the average value of the outlet moisture deviation;

[0060] Control outlet tobacco sheet temperature deviation mode: close the water supply, and adjust the opening degree of the pneumatic diaphragm valve according to the average value of the outlet tobacco sheet temperature deviation

[0061] Control outlet tobacco sheet moisture standard deviation mode: the opening degree of the pneumatic diaphragm valve is the minimum opening degree for normal water atomization, and the water amount is dynamically adjusted according to the outlet moisture standard deviation

[0062] Control outlet tobacco sheet temperature deviation mode: close the water supply, and dynamically adjust the opening degree of the pneumatic diaphragm valve according to the outlet tobacco sheet temperature standard deviation

[0063] Automatic mode: automatically adjust the outlet tobacco sheet temperature and the outlet tobacco sheet moisture according to the set control mode.

[0064] Specifically, in one embodiment of the present application, the opening degree of the first control valve and the second control valve is adjusted based on the temperature measurement value and the moisture measurement value, including:

[0065] Obtain a set moisture value and a set temperature value;

[0066] Calculate the difference between the temperature measurement value and the set temperature value as a temperature difference value;

[0067] Calculate the difference between the moisture measurement value and the set moisture value as a moisture difference value;

[0068] Adjust the opening degree of the first control valve and the opening degree of the second control valve based on the temperature difference value and the moisture difference value.

[0069] That is, the temperature residual and moisture residual control mode is adopted, specifically, the moisture residual at the outlet of the loose conditioning machine is applied to the control of the process water flow meter, so as to realize the rapid and flexible outlet tobacco sheet moisture adjustment and reduce the outlet tobacco sheet moisture standard deviation; the temperature residual at the outlet of the loose conditioning machine is applied to the control of the steam pipeline pneumatic diaphragm valve, so as to realize the rapid and flexible outlet tobacco sheet temperature adjustment and reduce the outlet tobacco sheet temperature standard deviation.

[0070] Specifically, the moisture set value and the temperature set value can be set according to the situation, and generally, the moisture set value is (17±0.5)% and the temperature set value is (55±1)℃.

[0071] In another embodiment of the present application, the temperature standard parameter and moisture standard residual control module can also be based on, specifically, the opening degrees of the first control valve and the second control valve are adjusted based on the temperature measurement value and the moisture measurement value, including:

[0072] The set moisture standard deviation value and the set temperature standard deviation are obtained;

[0073] The standard deviation of the temperature measurement value is calculated, and the difference between the standard deviation of the temperature measurement value and the set temperature standard deviation is taken as the temperature difference value;

[0074] The standard deviation of the moisture measurement value is calculated, and the difference between the standard deviation of the moisture measurement value and the set moisture standard deviation is taken as the moisture difference value;

[0075] The opening degrees of the first control valve and the second control valve are adjusted based on the temperature difference value and the moisture difference value.

[0076] Further, the opening degrees of the first control valve and the second control valve are adjusted based on the temperature difference value and the moisture difference value, including:

[0077] The temperature difference upper limit, the temperature difference lower limit, the moisture difference upper limit and the moisture difference lower limit are obtained respectively;

[0078] The temperature difference value is compared with the temperature difference upper limit and the temperature difference lower limit, and the moisture difference value is compared with the moisture difference lower limit and the moisture difference upper limit;

[0079] If the temperature difference value is greater than the temperature difference upper limit and the moisture difference value is between the moisture difference lower limit and the moisture difference upper limit, the opening degree of the first control valve is reduced;

[0080] If the temperature difference value is less than the temperature difference lower limit and the moisture difference value is between the moisture difference lower limit and the moisture difference upper limit, the opening degree of the first control valve is increased;

[0081] If the temperature difference value is between the temperature difference lower limit and the temperature difference upper limit and the moisture difference value is less than the moisture difference lower limit, the opening degree of the second control valve is increased;

[0082] if the temperature difference value is between the temperature difference lower limit and the temperature difference upper limit and the moisture difference value is greater than the moisture difference upper limit, then the opening of the second control valve is reduced;

[0083] if the temperature difference value is less than the temperature difference lower limit and the moisture difference value is less than the moisture difference lower limit, then the openings of the first control valve and the second control valve are simultaneously increased;

[0084] if the temperature difference value is greater than the temperature difference upper limit and the moisture difference value is greater than the moisture difference upper limit, then the openings of the first control valve and the second control valve are simultaneously reduced;

[0085] if the temperature difference value is less than the temperature difference lower limit and the moisture difference value is greater than the moisture difference upper limit, then the opening of the second control valve is reduced;

[0086] if the temperature difference value is greater than the temperature difference upper limit and the moisture difference value is less than the moisture difference lower limit, then the opening of the second control valve is increased.

[0087] Specifically, the temperature difference upper limit and the moisture difference upper limit are both greater than 0, the temperature difference lower limit and the moisture difference lower limit are both less than 0, and the temperature difference upper / lower limit and the moisture difference upper / lower limit can be set according to the process and tobacco requirements.

[0088] Further, the process water is output to the nozzle through the heating tank, and when the temperature difference value is less than the temperature difference lower limit and the moisture difference value is greater than the moisture difference upper limit, the process water can be heated by controlling the heating tank while reducing the opening of the second control valve.

[0089] The application increases the outlet feedback function and adopts the steam-water mixed adding mode, detects the moisture and temperature of the tobacco at the outlet of the loose conditioning machine, and based on the detected moisture and temperature values at the outlet, adjusts the first control valve and the second control valve in real time to control the proportion and weight of the steam and water added into the conditioning machine, thereby ensuring that the temperature and moisture of the tobacco at the outlet of the loose conditioning machine are within a suitable range.

[0090] The application also discloses a loose conditioning system, comprising a loose conditioning machine, wherein the nozzle of the loose conditioning machine is a double-medium nozzle, and the loose conditioning system further comprises:

[0091] a steam pipeline, one end of which is connected with one inlet of the double-medium nozzle, and the other end of which is connected with a steam source, and the steam pipeline is provided with a first control valve;

[0092] a water pipeline, one end of which is connected with the other inlet of the double-medium nozzle, and the other end of which is connected with a water source, and the water pipeline is provided with a second control valve;

[0093] a moisture detector, which is arranged at the outlet of the loose conditioning machine and is used for detecting the moisture of the tobacco at the outlet of the loose conditioning machine;

[0094] A temperature detector is arranged at the outlet of the loose conditioning machine to detect the temperature of the tobacco at the outlet of the loose conditioning machine.

[0095] A control module is connected with the moisture detector, the temperature detector, the first control valve and the second control valve respectively, and is configured to adjust the opening degrees of the first control valve and the second control valve according to the output data of the moisture detector and the temperature detector.

[0096] Specifically, the application adds an outlet feedback function, and adopts a steam-water mixing adding mode, detects the moisture and temperature of the tobacco at the outlet of the loose conditioning machine by using the moisture detector and the temperature detector, and adjusts the opening degrees of the first control valve and the second control valve in real time based on the detected moisture and temperature values at the outlet to control the proportion and weight of the steam and water added into the conditioning machine, so as to ensure that the temperature and moisture of the tobacco at the outlet of the loose conditioning machine are within a proper range.

[0097] Specifically, the first control valve is a pneumatic diaphragm valve.

[0098] As shown in Figure 2 As shown in FIG. 2, along the conveying direction of the process water, a heating water tank 21, a flow meter 22 and an overflow valve 23 are further arranged on the output pipeline, wherein the flow meter 22 and the heating water tank 21 are connected with the control module, the flow meter 22 is configured to detect the water flow in the water conveying pipeline, and the heating water tank 21 is configured to heat the process water.

[0099] Specifically, the overflow valve 23 is used to balance the pressure to protect the flow meter 22. Specifically, if the nozzle 30 is blocked, the pressure between the flow meter 22 and the nozzle 30 will be very large, which may cause damage to the flow meter 22. Therefore, in order to balance the pressure to protect the flow meter 22, the overflow valve 23 is added between the flow meter 22 and the nozzle 30, so that when the nozzle 30 is blocked, the overflow valve 23 is used to prevent the flow meter 22 from being damaged before the pressure returns to the flow meter 22.

[0100] As shown in FIG. 2, along the conveying direction of the steam, the steam source and the pneumatic diaphragm valve 14 are sequentially provided with a stop valve 11, a filter 12 and a pressure reducing valve 13, and the steam is sequentially output to the nozzle 30 through the stop valve 11, the filter 12, the pressure reducing valve 13 and the pneumatic diaphragm valve 14.

[0101] It has to be noted that, in the description of the application and in the claims the terms "including" and "having" and the like are used in the sense of "including at least the recited entity or entities, but not excluding others". Furthermore, the terms "first", "second" and the like are used merely as labels, i.e. they are used to distinguish between two entities that have the same or similar characteristics, but do not necessarily indicate a particular order or sequence. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", or "comprises" does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0102] While the application has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the application is not limited to the disclosed embodiments.

Claims

1. A method for loosening and rehumidifying tobacco, used to control the temperature and moisture content of the tobacco at the outlet of a loosening and rehumidifying machine, characterized in that, include: The nozzle of the loosening and rehydration machine is set as a dual-media nozzle; One of the inlets of the dual-medium nozzle is connected to a steam source through a first control valve, and the other inlet of the dual-medium nozzle is connected to a water source through a second control valve. Obtain the temperature and moisture content of the tobacco at the outlet of the loosening and rehumidifying machine; The opening degrees of the first control valve and the second control valve are adjusted based on the temperature measurement value and the moisture measurement value, respectively. Adjusting the opening degrees of the first control valve and the second control valve based on the temperature measurement value and the moisture measurement value respectively includes: Obtain the set moisture value and set temperature value; The difference between the measured temperature value and the set temperature value is calculated as the temperature difference value; The difference between the measured moisture value and the set moisture value is calculated as the moisture difference. The opening degree of the first control valve and the opening degree of the second control valve are adjusted based on the temperature difference and the moisture difference. Adjusting the opening degree of the first control valve and the second control valve based on the temperature difference and the moisture difference includes: Obtain the upper limit of temperature difference, the lower limit of temperature difference, the upper limit of moisture difference, and the lower limit of moisture difference, respectively. The temperature difference value is compared with the upper limit of the temperature difference and the lower limit of the temperature difference, and the moisture difference value is compared with the lower limit of the moisture difference and the upper limit of the moisture difference; If the temperature difference is greater than the upper limit of the temperature difference and the moisture difference is between the lower limit of the moisture difference and the upper limit of the moisture difference, then reduce the opening of the first control valve; If the temperature difference is less than the lower limit of the temperature difference and the moisture difference is between the lower limit of the moisture difference and the upper limit of the moisture difference, then increase the opening of the first control valve; If the temperature difference is between the lower limit of the temperature difference and the upper limit of the temperature difference, and the moisture difference is less than the lower limit of the moisture difference, then the opening of the second control valve is increased. If the temperature difference is between the lower limit and the upper limit of the temperature difference and the moisture difference is greater than the upper limit of the moisture difference, then the opening of the second control valve is reduced. If the temperature difference is less than the lower limit of the temperature difference and the moisture difference is less than the lower limit of the moisture difference, then the opening of the first control valve and the second control valve are increased simultaneously. If the temperature difference is greater than the upper limit of the temperature difference and the moisture difference is greater than the upper limit of the moisture difference, then the opening of the first control valve and the second control valve are reduced simultaneously. If the temperature difference is less than the lower limit of the temperature difference and the moisture difference is greater than the upper limit of the moisture difference, then reduce the opening of the second control valve; If the temperature difference is greater than the upper limit of the temperature difference and the moisture difference is less than the lower limit of the moisture difference, then increase the opening of the second control valve; Wherein, the upper limit of the temperature difference and the upper limit of the moisture difference are both greater than 0, and the lower limit of the temperature difference and the lower limit of the moisture difference are both less than 0; The method also includes a heating assembly for heating water supplied to another inlet of the dual-medium nozzle, and further includes: When the temperature difference is less than the lower limit of the temperature difference and the moisture difference is greater than the upper limit of the moisture difference, the heating component is controlled to heat the water while the opening of the second control valve is reduced.

2. The method for loosening and rehydrating tobacco as described in claim 1, characterized in that, Adjusting the opening degrees of the first control valve and the second control valve based on the temperature measurement value and the moisture measurement value respectively includes: Obtain the set moisture standard deviation and the set temperature standard deviation; Calculate the standard deviation of the temperature measurement value, and take the difference between the standard deviation of the temperature measurement value and the standard deviation of the set temperature as the temperature difference value; Calculate the standard deviation of the moisture measurement value, and take the difference between the standard deviation of the moisture measurement value and the set moisture standard deviation as the moisture difference value; The opening degree of the first control valve and the opening degree of the second control valve are adjusted based on the temperature difference and the moisture difference.

3. The method for loosening and rehydrating tobacco as described in claim 1, characterized in that, The first control valve is a pneumatic diaphragm valve.

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