CN113475733B - Method and device for drying tobacco and drying equipment - Google Patents
Method and device for drying tobacco and drying equipment Download PDFInfo
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- CN113475733B CN113475733B CN202110700630.XA CN202110700630A CN113475733B CN 113475733 B CN113475733 B CN 113475733B CN 202110700630 A CN202110700630 A CN 202110700630A CN 113475733 B CN113475733 B CN 113475733B
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- 238000001035 drying Methods 0.000 title claims abstract description 134
- 241000208125 Nicotiana Species 0.000 title claims abstract description 103
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000008859 change Effects 0.000 claims abstract description 63
- 238000004383 yellowing Methods 0.000 claims abstract description 15
- 239000003507 refrigerant Substances 0.000 claims description 30
- 238000004364 calculation method Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000000704 physical effect Effects 0.000 claims description 6
- 238000009834 vaporization Methods 0.000 claims description 6
- 230000008016 vaporization Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000004044 response Effects 0.000 claims 2
- 230000008569 process Effects 0.000 abstract description 6
- 238000007791 dehumidification Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000012790 confirmation Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/10—Roasting or cooling tobacco
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Abstract
The application relates to the technical field of drying and discloses a method for drying tobacco. Under the condition that the tobacco is dried in a yellowing stage, the ratio of flue-curing room return air to outdoor fresh air in a heat regenerator is adjusted according to the current humidity change rate of the flue-curing room; under the condition that the tobacco is dried in a fixed color period, adjusting the frequency of a compressor, the opening degree of a first air valve and the opening degree of a second air valve according to the current humidity change rate and the current temperature rise rate of a curing barn; and under the condition that the tobacco is dried in the stem drying period, adjusting the frequency of a compressor and the opening degree of a secondary air valve according to the current temperature and the current temperature rise rate of the curing barn. In the process of tobacco drying, aiming at different tobacco drying states, a diversified tobacco drying method corresponding to the tobacco drying states is adopted, so that the error regulation of drying equipment is reduced, the tobacco leaf baking quality is improved, and the economic yield and value of tobacco leaves are improved. The application also discloses a device and drying equipment for tobacco is dried.
Description
Technical Field
The application relates to the technical field of drying, for example, to a method and a device for drying tobacco and drying equipment.
Background
In the existing tobacco drying process, a method for monitoring humidity of a curing barn is to place a humidity sensor, and feed back a humidity value measured by the humidity sensor to tobacco drying equipment. The tobacco drying equipment adjusts the frequency of the compressor according to the humidity value of the curing barn to complete the humidity adjustment in the curing barn.
However, in the actual drying process of tobacco, the tobacco leaves are dehumidified into the curing barn while the drying equipment is dehumidified from the curing barn, so that the relative humidity in the space is unstable, and the drying equipment is controlled to dry the tobacco only according to the humidity value, so that the drying equipment is adjusted wrongly according to the humidity value, the color of the tobacco leaves is poor, and the economic yield and value of the tobacco leaves are influenced.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended to be a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for drying tobacco and drying equipment, so as to reduce error adjustment of the drying equipment and improve the color of the dried tobacco.
In some embodiments, the method is applied to a drying device, the drying device comprises a compressor, an evaporator, a first air valve, a second air valve and a heat regenerator, the heat regenerator can be used for exchanging heat between fresh outdoor air and flue-curing barn return air, the first air valve is used for controlling the flow of the flue-curing barn return air entering the heat regenerator, and the second air valve is used for controlling the flow of the flue-curing barn return air entering the evaporator; the method comprises the following steps:
confirming the current humidity change rate of the baking room;
under the condition that the tobacco is dried in a yellowing stage, the ratio of flue-curing room return air to outdoor fresh air in a heat regenerator is adjusted according to the current humidity change rate of the flue-curing room;
under the condition that the tobacco is dried in a fixed color period, adjusting the frequency of a compressor, the opening of a first air valve and the opening of a second air valve according to the current humidity change rate and the current temperature rise rate of the curing barn;
and under the condition that the tobacco is dried in the dry rib period, adjusting the frequency of the compressor and the opening degree of the second air valve according to the current temperature of the curing barn and the current temperature rise rate of the curing barn.
In some embodiments, the apparatus for tobacco drying comprises:
a confirmation module configured to confirm a current humidity change rate of the roasting room;
the first control module is configured to adjust the proportion of flue-curing barn return air and outdoor fresh air in the heat regenerator according to the current humidity change rate of the flue-curing barn under the condition that the tobacco is dried in the yellowing period;
the second control module is configured to adjust the frequency of the compressor, adjust the opening degree of the first air valve and adjust the opening degree of the second air valve according to the current humidity change rate and the current temperature rise rate of the curing barn under the condition that the tobacco is dried in the color fixing period;
and the third control module is configured to adjust the frequency of the compressor and the opening of the second air valve according to the current temperature of the curing barn and the current temperature rise rate of the curing barn under the condition that the tobacco is dried in the stem drying period.
In some embodiments, the apparatus for tobacco drying comprises:
a processor and a memory storing program instructions, the processor being configured, upon execution of the program instructions, to perform the method for tobacco drying described above.
In some embodiments, the drying apparatus includes:
the device for drying the tobacco is described above.
The method, the device and the drying equipment for drying the tobacco provided by the embodiment of the disclosure can realize the following technical effects:
in the process of tobacco drying, the dehumidifying and heating requirements of the tobacco drying under different states are fully considered for different tobacco drying states, a diversified tobacco drying method corresponding to the tobacco drying states is adopted, not only is the humidity change rate adjusting and drying equipment adopted, but also the temperature rise rate and temperature adjusting and drying equipment are adopted, so that the error adjustment of the drying equipment is reduced, the tobacco leaf drying quality is improved, and the economic yield and value of the tobacco leaves are improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated in the accompanying drawings, which correspond to the accompanying drawings and not in a limiting sense, in which elements having the same reference numeral designations represent like elements, and in which:
FIG. 1 is a schematic diagram of a method for tobacco drying provided by an embodiment of the present disclosure;
FIG. 2 is a schematic view of an apparatus for tobacco drying provided by an embodiment of the present disclosure;
fig. 3 is a schematic view of another apparatus for tobacco drying according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and advantages of the embodiments of the present disclosure can be understood in detail, a more particular description of the embodiments of the disclosure, briefly summarized above, may be had by reference to the appended drawings, which are included to illustrate, but are not intended to limit the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
With reference to fig. 1, an embodiment of the present disclosure provides a control method for an air conditioner, which is applied to a drying device, where the drying device includes a compressor, an evaporator, a first air valve, a second air valve, and a heat regenerator, the heat regenerator may be used for heat exchange between outdoor fresh air and flue-curing barn return air, the first air valve is used for controlling flow of the flue-curing barn return air entering the heat regenerator, and the second air valve is used for controlling flow of the flue-curing barn return air entering the evaporator; the method comprises the following steps:
s01, the drying equipment confirms the current humidity change rate of the baking room;
s02, under the condition that the tobacco is dried in a yellowing stage, the drying equipment adjusts the proportion of flue-curing barn return air and outdoor fresh air in a heat regenerator according to the current humidity change rate of the flue-curing barn;
s03, under the condition that the tobacco is dried in the color fixing period, the drying equipment adjusts the frequency of a compressor, the opening degree of a first air valve and the opening degree of a second air valve according to the current humidity change rate and the current temperature rise rate of the curing barn;
and S04, under the condition that the tobacco is dried in the dry tobacco curing period, the drying equipment adjusts the frequency of the compressor and the opening of the second air valve according to the current temperature of the curing barn and the current temperature rise rate of the curing barn.
By adopting the control method for the air conditioner provided by the embodiment of the disclosure, according to the tobacco drying state, under the condition that the requirement of temperature rise in the yellowing stage is not high, the fresh air proportion in the heat regenerator is controlled to dehumidify the return air of the baking chamber according to the obtained current humidity change rate of the baking chamber, so that the air entering the baking chamber meets the humidity requirement, the frequency of a compressor is controlled and adjusted without wasting system resources, the humidity requirement of the yellowing stage can be met, the energy consumption is reduced, in the color fixing stage of tobacco drying, the temperature is increased and the dehumidification is further carried out, the frequency of the compressor, the opening of a first air valve and the opening of a second air valve are adjusted according to the obtained current humidity change rate and the temperature increase rate of the baking chamber, so as to meet the temperature requirement and the humidity requirement of the baking chamber, compared with the method for the air conditioner, the flow of the return air of the evaporator is adjusted by adjusting the opening of the second air valve according to adjust the humidity of the baking chamber only according to the humidity, the refrigerating capacity of the evaporator is improved, the heating capacity of the condenser is increased, the temperature factor is considered, the phenomenon that in the tobacco drying process, tobacco leaves are dehumidified into a curing barn while the drying system is dehumidified from the curing barn, so that the relative humidity in the curing barn is unstable, the error adjustment of drying equipment can be caused only by controlling according to the humidity value is avoided, the temperature is mainly increased in the dry muscle period of tobacco drying, the temperature is required to be stabilized at a fixed value finally, the frequency of a compressor and the opening degree of a second air valve are adjusted according to the current temperature rise rate and temperature of the curing barn, the flow of return air of the curing barn entering the evaporator is controlled, the heating capacity of the condenser is increased, the change of the humidity is not required to be additionally considered, the system resources are saved, and different drying and dehumidifying methods corresponding to the tobacco drying states are adopted according to the different tobacco drying states, the humidity in the curing barn is adjusted in a targeted manner, the energy consumption is reduced, the tobacco leaves are cured to have good color, and the economic yield and value of the tobacco leaves are improved.
Optionally, in a case that the tobacco is dried in the yellowing stage, the adjusting, by the drying device, a ratio of flue-cured room return air to outdoor fresh air in the heat regenerator according to a current humidity change rate of the flue-cured room includes: the drying equipment determines a first humidity change rate difference value between the current humidity change rate of the baking room and a first target humidity change rate; the drying equipment determines the proportion of the flue-curing barn return air and the outdoor fresh air corresponding to the first humidity change rate difference value according to a preset corresponding relation; the drying equipment adjusts the proportion of the flue-curing barn return air and the outdoor fresh air in the heat regenerator according to the proportion.
Therefore, in the yellowing period of tobacco drying, the dehumidifying requirement for tobacco drying is not high, only outdoor fresh air with low temperature and low humidity needs to be introduced, heat exchange is carried out between the fresh air and high-temperature and high-humidity flue-curing barn return air at a heat regenerator, the dehumidifying requirement for the yellowing period of tobacco drying can be completed, the dehumidifying rate of the flue-curing barn still needs to be maintained at a fixed value at the stage, the ratio of the flue-curing barn return air to the outdoor fresh air corresponding to the first humidity change rate difference value is determined according to the first humidity change rate difference value of the current humidity change rate and the first target humidity change rate of the flue-curing barn, and finally the ratio of the flue-curing barn return air to the outdoor fresh air in the heat regenerator is adjusted according to the ratio, the dehumidifying requirement of the flue-curing barn in the yellowing period of tobacco drying can be met by adjusting the ratio of the outdoor fresh air to the flue-curing barn return air in the heat regenerator, the frequency of a compressor and the area of an air valve do not need to be controlled, system resources are saved, and energy consumption is reduced.
Optionally, in the case that the tobacco drying is in the fixation period, the drying device adjusts the frequency of the compressor according to the current humidity change rate of the curing barn and the current temperature rise rate of the curing barn, and adjusting the opening degree of the air valve includes: the drying equipment determines a first temperature rise difference value of the current temperature rise rate and a first target temperature rise rate of the curing barn; the drying equipment determines a second humidity change rate difference value between the current humidity change rate of the baking room and a second target humidity change rate; the drying equipment determines the compressor frequency, the first air valve opening and the second air valve opening corresponding to the first temperature rise difference and the second humidity change rate difference according to a preset corresponding relation; the drying equipment adjusts the frequency of the compressor to a first set frequency according to the frequency of the compressor, the opening degree of the first air valve and the opening degree of the second air valve, adjusts the opening degree of the first air valve to a first set opening degree, and adjusts the opening degree of the second air valve to a second set opening degree.
Thus, under the condition that tobacco drying is in a fixed color period, at the moment, further dehumidification is needed, a certain temperature rise rate of a curing barn is maintained, dehumidification is carried out only by adjusting the proportion of outdoor fresh air and curing barn return air in a heat regenerator, the dehumidification requirement of the curing barn at the stage cannot be met, the difference value of the current temperature rise rate of the curing barn and a first target temperature rise rate is determined by determining the difference value of the current humidity change rate of the curing barn and a second target humidity change rate of the curing barn, the difference value of the compressor frequency, the first air valve opening and the second air valve opening corresponding to the difference value of the first temperature rise rate and the second humidity change rate is determined according to a preset corresponding relation, the compressor frequency, the first air valve opening and the second air valve opening which are required to meet the dehumidification rate and the temperature rise rate at the stage are obtained, the first air valve opening and the second air valve opening are obtained, finally, the evaporator and the condenser are enabled to meet the refrigeration and heating requirements by adjusting the first air valve opening to adjust the humidity in the curing barn, the air flow rate of the curing barn to meet the low-temperature-rise rate requirement, and the low-temperature-rise rate of the curing barn is adjusted to meet the requirements of the dehumidification requirement, and the low-temperature-rise rate of the curing barn, and the low-temperature-air is adjusted air. In the color fixing period of tobacco drying, the opening degree of the first air valve, the opening degree of the second air valve and the frequency of the compressor are adjusted according to the temperature rise rate and the dehumidification rate, the dehumidification rate of the curing barn is not controlled only according to the humidity value, the influence of the temperature rise rate is considered, the phenomenon that the tobacco leaves are dehumidified into the curing barn at one time is avoided, the drying system dehumidifies from the curing barn at the other time, the relative humidity in the space is unstable, the drying equipment is controlled to dry the tobacco only according to the humidity value, the drying equipment can be adjusted wrongly according to the humidity value, the tobacco leaves are poor in color, the economic yield and the value of the tobacco leaves are influenced, and the color and the economic value of the tobacco are improved.
Optionally, under the condition that the tobacco is dried in the dry tobacco stem period, the drying device adjusts the frequency of the compressor according to the current temperature of the curing barn and the current temperature rise rate of the curing barn, and adjusting the opening degree of the second air valve includes: the drying equipment acquires the current temperature of the curing barn; the drying equipment acquires the current temperature rise rate of the curing barn under the condition that the current temperature of the curing barn is lower than the set temperature; the drying equipment determines a second temperature rise difference value between the current temperature rise of the curing barn and a second target temperature rise; the drying equipment determines the compressor frequency and the second air valve opening degree corresponding to the second temperature rise difference value according to a preset corresponding relation; and the drying equipment adjusts the frequency of the compressor to a second set frequency and adjusts the opening of the second air valve to a third set opening according to the frequency of the compressor and the opening of the air valve.
Therefore, under the condition that the tobacco is dried in a rib drying period, the temperature rise is the main target in the stage, the temperature of the curing barn is maintained at a fixed value, the current temperature rise rate of the curing barn is obtained under the condition that the current temperature of the curing barn is lower than the set temperature by obtaining the current temperature rise rate of the curing barn, the frequency of a compressor and the opening degree of a wind valve are adjusted according to the current temperature rise rate of the curing barn obtained under the condition that the current temperature rise rate of the curing barn is lower than the set temperature, the condition that the temperature rise rate is increased too fast to be higher than the fixed value due to blind increase of the temperature rise rate is avoided, the difference value of the current temperature rise rate of the curing barn and the second target temperature rise rate is determined, the frequency of the compressor and the opening degree of the second wind valve corresponding to the second temperature rise rate difference value are determined according to a preset corresponding relation, finally, the frequency of the compressor is adjusted to the second set frequency according to the opening degree of the second wind valve, the opening degree of the second wind valve is adjusted to the third set opening degree, the flow rate of the air return air of the evaporator is controlled by adjusting the opening degree of the second wind valve, the air return air of the evaporator, the cooling capacity of the evaporator is improved, the rib drying period and the drying system is not considered, the drying efficiency of the drying system, and the drying efficiency is reduced.
Optionally, the drying apparatus further includes a condenser, and the determining of the current humidity change rate of the baking room by the drying apparatus includes: the drying equipment determines the air humidity change rate according to the evaporator inlet temperature, the evaporator outlet temperature, the evaporator refrigerating capacity, the air constant-pressure specific heat capacity and the water latent heat of vaporization; the refrigerating capacity of the evaporator is determined according to the pressure of a compressor suction port, the pressure of a compressor exhaust port, the temperature of a compressor suction port refrigerant, the temperature of a compressor exhaust port refrigerant, the pressure of a condenser outlet and the temperature of a condenser outlet refrigerant.
Therefore, the current humidity change rate of the baking room can be obtained by obtaining the pressure of the compressor and the condenser, the temperature of the refrigerant flowing through each part and the temperature of the evaporator, the current indoor humidity can be obtained without arranging a humidity sensor with poor stability, low precision and high cost, and the humidity change rate of the baking room can be obtained only according to the temperature and the pressure. In actual use, the temperature sensor and the pressure sensor which are reliable and mature in stability are used for replacing the humidity sensor, and the accurate humidity change rate of the curing barn is directly calculated through the temperature value, the pressure value and the like, so that the acquired humidity change rate of the curing barn is more accurate, the operation of the tobacco drying equipment is adjusted, the operation is accurate, simple and low in cost, the limitation that the humidity sensor cannot work above 40 ℃ is avoided, and the applicability is improved.
Optionally, the determining, by the drying device, an air humidity change rate according to the evaporator inlet temperature, the evaporator outlet temperature, the evaporator refrigerating capacity, the air constant-pressure specific heat capacity, and the latent heat of vaporization of the water includes: drying equipment calculation
Wherein T4 is the inlet temperature of the evaporator, T5 is the outlet temperature of the evaporator, cp is the specific heat capacity of air at constant pressure, gamma is the latent heat of vaporization of water, and Q is the refrigeration of the evaporatorAmount, m a Is the air humidity rate of change.
Like this, the constant pressure specific heat capacity is known definite value, can obtain the air humidity rate of change through pressure and temperature calculation, compare in through traditional humidity transducer, adopt temperature and humidity to calculate and compare in humidity transducer detection humidity more reliable and accurate, the cost is reduced, and not influenced by temperature drift, and humidity transducer does not possess the ability of working more than 40 ℃, adopt temperature and humidity to calculate still can accurately acquire temperature and pressure, the degree of accuracy of calculation has been improved.
Optionally, the drying device determining the cooling capacity of the evaporator according to the pressure of the compressor air suction port, the pressure of the compressor air discharge port, the temperature of the compressor air suction port refrigerant, the temperature of the compressor air discharge port refrigerant, the pressure of the condenser outlet and the temperature of the condenser outlet refrigerant includes: drying equipment calculates Q = m r ×(H 3 -H 1 ) (ii) a Wherein Q is the refrigerating capacity of the evaporator, m r Is the evaporator refrigerant flow, H 1 Is at a first enthalpy value, H 3 Is a third enthalpy value; a first enthalpy value determined by a physical property calculation method according to a compressor suction port pressure and a compressor suction port refrigerant temperature; the third enthalpy value is determined by a physical property calculation method according to the outlet pressure of the condenser and the outlet refrigerant temperature of the condenser; the evaporator refrigerant flow rate is determined based on the compressor power consumption, the first enthalpy and the second enthalpy.
Therefore, the refrigerating capacity of the evaporator is calculated according to the refrigerant flow of the evaporator, the third enthalpy value and the first enthalpy value, wherein the refrigerant flow of the evaporator is calculated through the first enthalpy value, the second enthalpy value and the power consumption of the compressor, the first enthalpy value, the second enthalpy value and the third enthalpy value are calculated according to the temperature and the pressure, the humidity is more reliable and accurate to detect by adopting the temperature and the humidity compared with a humidity sensor, the cost is reduced, the influence of temperature drift is avoided, the humidity sensor does not have the capacity of working above 40 ℃, the temperature and the pressure can be still accurately obtained by adopting the temperature and humidity calculation above 40 ℃, and the calculation accuracy is improved.
Optionally, the drying device consumes power according to the compressor,The first and second enthalpy determining evaporator refrigerant flow rates comprise: the drying equipment obtains a second enthalpy value through a physical property calculation method according to the pressure of the exhaust port of the compressor and the temperature of a refrigerant at the exhaust port of the compressor; drying equipment calculation
Wherein m is r For evaporator refrigerant flow, P is compressor power consumption, H 1 Is at a first enthalpy value, H 2 Is the second enthalpy.
The power consumption of the compressor can be obtained by looking at a nameplate of the compressor, can also be obtained by multiplying the power of the motor by 0.8, and can also be obtained by multiplying the working current by 2, and the mode of obtaining the power consumption of the compressor is not limited herein.
Therefore, according to the difference value of the first enthalpy value and the second enthalpy value and the ratio of the power consumption of the compressor, the refrigerant flow of the evaporator can be calculated, the first enthalpy value and the second enthalpy value are obtained by calculating the measured temperature value and the pressure value, the humidity is more reliable and accurate to detect by adopting the temperature and humidity calculation compared with a humidity sensor, the cost is reduced, the humidity sensor is not influenced by temperature drift, the humidity sensor does not have the capacity of working above 40 ℃, the temperature and the pressure can still be accurately obtained by adopting the temperature and humidity calculation above 40 ℃, and the calculation accuracy is improved.
Referring to fig. 2, an embodiment of the present disclosure provides an apparatus for drying tobacco, including a confirmation module 21, a first control module 22, a second control module 23, and a third control module 24. The confirmation module 21 is configured to confirm the current humidity change rate of the baking room; the first control module 22 is configured to adjust the ratio of the flue-curing barn return air to the outdoor fresh air in the heat regenerator according to the current humidity change rate of the flue-curing barn in the case that the tobacco drying is in the yellowing stage; the second control module 23 is configured to adjust the frequency of the compressor, the opening of the first air valve and the opening of the second air valve according to the current humidity change rate and the current temperature rise rate of the curing barn when the tobacco is dried in the fixing period; the third control module 24 is configured to adjust the frequency of the compressor and the opening degree of the second air valve according to the current temperature of the curing barn and the current temperature rise rate of the curing barn under the condition that the tobacco drying is in the dry rib period.
By adopting the device for drying the tobacco, according to the state of drying the tobacco, under the condition that the temperature rise requirement in the yellowing period is not high, the fresh air proportion in the heat regenerator is controlled to dehumidify the return air of the curing barn according to the obtained current humidity change rate of the curing barn, so that the air entering the curing barn meets the humidity requirement, the frequency of the compressor is controlled and adjusted without wasting system resources, the humidity requirement in the yellowing period can be met, the energy consumption is reduced, in the color fixing period of drying the tobacco, the temperature is increased and the dehumidification is further carried out, the frequency of the compressor, the opening degree of the first air valve and the opening degree of the second air valve are adjusted according to the obtained current humidity change rate and the temperature increase rate of the curing barn, so as to meet the temperature requirement and the humidity requirement of the curing barn, compared with the condition that the humidity of the curing barn is adjusted only according to the humidity, the flow of the return air entering the evaporator is adjusted by adjusting the opening degree of the second air valve, the refrigerating capacity of the evaporator is improved, the heating capacity of the condenser is increased, the temperature factor is considered, the phenomenon that in the tobacco drying process, tobacco leaves are dehumidified into a curing barn while the drying system is dehumidified from the curing barn, so that the relative humidity in the curing barn is unstable, the error adjustment of drying equipment can be caused only according to the control of the humidity value is avoided, the temperature is mainly increased in the dry muscle period of tobacco drying, the temperature is required to be stabilized at a fixed value finally, the frequency of a compressor and the opening degree of a second air valve are adjusted according to the current temperature rise rate and temperature of the curing barn, the flow of return air of the curing barn entering the evaporator is controlled, the heating capacity of the condenser is increased, the change of the humidity is not required to be additionally considered, the system resources are saved, different drying and dehumidifying methods corresponding to the tobacco drying states are adopted according to different tobacco drying states, the humidity in the curing barn is adjusted in a targeted manner, the energy consumption is reduced, the tobacco leaves are cured to be good in color, and the economic yield and value of the tobacco leaves are improved.
As shown in fig. 3, an embodiment of the present disclosure provides an apparatus for drying tobacco, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other through the bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the control method for the air conditioner of the above-described embodiment.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, namely, implements the method for tobacco drying in the above embodiment.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides a drying device, which comprises the device for drying tobacco.
Embodiments of the present disclosure provide a storage medium storing computer-executable instructions configured to perform the above-described method for tobacco drying.
The storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a portable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description for example only and are not limiting upon the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising one of 8230," does not exclude the presence of additional like elements in a process, method or device comprising the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (8)
1. A method for drying tobacco is characterized by being applied to a drying device, wherein the drying device comprises a compressor, an evaporator, a condenser, a first air valve, a second air valve and a heat regenerator, the heat regenerator can be used for exchanging heat between fresh outdoor air and flue-curing barn return air, the first air valve is used for controlling the flow of the flue-curing barn return air entering the heat regenerator, and the second air valve is used for controlling the flow of the flue-curing barn return air entering the evaporator; the method comprises the following steps:
confirming the current humidity change rate of the baking room;
under the condition that the tobacco is dried in a yellowing stage, the proportion of the flue-curing barn return air and the outdoor fresh air in the heat regenerator is adjusted according to the current humidity change rate of the flue-curing barn;
under the condition that the tobacco is dried in the color fixing period, adjusting the frequency of the compressor, the opening degree of the first air valve and the opening degree of the second air valve according to the current humidity change rate and the current temperature rise rate of the curing barn; the flow of flue-curing barn return air entering the evaporator is adjusted by adjusting the opening degree of the second air valve, so that the refrigerating capacity of the evaporator is improved, and the heating capacity of the condenser is increased;
under the condition that the tobacco is dried in a rib drying period, adjusting the frequency of the compressor and the opening degree of the second air valve according to the current temperature of the curing barn and the current temperature rise rate of the curing barn;
the drying apparatus further includes a condenser; the confirming of the current humidity change rate of the curing barn comprises: determining the air humidity change rate according to the evaporator inlet temperature, the evaporator outlet temperature, the evaporator refrigerating capacity, the air constant-pressure specific heat capacity and the latent heat of vaporization of water; the refrigerating capacity of the evaporator is determined according to the pressure of a compressor suction port, the pressure of a compressor exhaust port, the temperature of a compressor suction port refrigerant, the temperature of a compressor exhaust port refrigerant, the pressure of a condenser outlet and the temperature of a condenser outlet refrigerant;
according to evaporimeter inlet temperature, evaporimeter outlet temperature, evaporimeter refrigerating capacity, air constant pressure specific heat capacity and the latent heat of vaporization of water confirm the air humidity rate of change, include:
calculating out
Wherein T4 is the evaporator inlet temperature, T5 is the evaporator outlet temperature, cp is the air constant pressure specific heat capacity, gamma is the latent heat of vaporization of the water, Q is the evaporator refrigerating capacity, m a Is the air humidity rate of change.
2. The method of claim 1, wherein said adjusting the ratio of said flue-curing barn return air to said outdoor fresh air in said regenerator in response to the current rate of change of humidity in said flue-curing barn during the tobacco drying process during the yellowing stage comprises:
determining a first humidity change rate difference value of the current humidity change rate and a first target humidity change rate of the baking room;
determining the proportion of the flue-curing barn return air and the outdoor fresh air corresponding to the first humidity change rate difference value according to a preset corresponding relation;
and adjusting the proportion of the flue-curing barn return air and the outdoor fresh air in the heat regenerator according to the proportion.
3. The method of claim 1, wherein said adjusting the frequency of said compressor, adjusting the opening of said first damper, and adjusting the opening of said second damper in response to the current humidity rate and the current temperature rate of the barn during the time period for tobacco curing, comprises:
determining a first temperature rise difference value of the current temperature rise of the curing barn and a first target temperature rise; determining a second humidity change rate difference value between the current humidity change rate of the baking room and a second target humidity change rate;
determining the compressor frequency, the first air valve opening degree and the second air valve opening degree corresponding to the first temperature rise rate difference value and the second humidity change rate difference value according to a preset corresponding relation;
and adjusting the frequency of the compressor to a first set frequency according to the frequency of the compressor, the opening degree of the first air valve and the opening degree of the second air valve, adjusting the opening degree of the first air valve to a first set opening degree, and adjusting the opening degree of the second air valve to a second set opening degree.
4. The method of claim 1, wherein said adjusting the frequency of said compressor and the opening of said second damper according to the current temperature of said flue-curing barn and the current temperature rise rate of said flue-curing barn during the dry-rib period of tobacco drying comprises:
acquiring the current temperature of the curing barn;
under the condition that the current temperature of the curing barn is lower than a set temperature, acquiring the current temperature rise rate of the curing barn;
determining a second temperature rise difference value of the current temperature rise of the curing barn and a second target temperature rise;
determining the compressor frequency and the second air valve opening degree corresponding to the second temperature rise difference value according to a preset corresponding relation;
and adjusting the frequency of the compressor to a second set frequency and adjusting the opening of the second air valve to a third set opening according to the frequency of the compressor and the opening of the air valve.
5. The method of claim 1, wherein determining the evaporator capacity based on a compressor suction pressure, a compressor discharge pressure, a compressor suction refrigerant temperature, a compressor discharge refrigerant temperature, a condenser outlet pressure, and a condenser outlet refrigerant temperature comprises:
calculate Q = m r ×(H 3 -H 1 )；
Wherein Q is the refrigerating capacity of the evaporator, m r Is the evaporator refrigerant flow, H 1 Is at a first enthalpy value, H 3 Is a third enthalpy value; the first enthalpy value is determined by a physical property calculation method according to the pressure of the compressor suction port and the temperature of the refrigerant at the compressor suction port; the third enthalpy is determined by a physical property calculation method based on the condenser outlet pressure and the condenser outlet refrigerant temperature; said evaporator refrigerant flow is determined based on compressor power consumption, said first enthalpy and said second enthalpy; the second enthalpy value is obtained by a physical property calculation method according to the compressor discharge port pressure and the compressor discharge port refrigerant temperature.
6. The method of claim 5, wherein determining said evaporator refrigerant flow based on compressor power consumption, said first enthalpy and said second enthalpy comprises:
computing
Wherein m is r For the evaporator refrigerant flow, P for the compressor power consumption, H 1 Is the first enthalpy value, H 2 Is the second enthalpy value.
7. An apparatus for tobacco drying comprising a processor and a memory storing program instructions, characterized in that the processor is configured to perform the method for tobacco drying according to any of claims 1 to 6 when executing the program instructions.
8. The utility model provides a drying equipment, includes compressor, evaporimeter, first blast gate, second blast gate and regenerator, the regenerator can be used to outdoor new trend and roast room return air and carry out the heat exchange, first blast gate is used for the control to get into the regenerator roast room return air's flow, the second blast gate is used for the control to get into the evaporimeter roast room return air's flow, its characterized in that still includes: the apparatus for tobacco drying of claim 7.
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| CN113945086B (en) * | 2021-10-15 | 2023-02-24 | 青岛海尔空调电子有限公司 | Method and device for controlling heat pump dryer, electronic equipment and storage medium |
| CN114002977B (en) * | 2021-10-22 | 2023-12-08 | 珠海格力电器股份有限公司 | Control method and device of tobacco dryer unit, electronic equipment and storage medium |
| CN114396791B (en) * | 2021-12-01 | 2023-06-20 | 青岛海尔空调电子有限公司 | Method and device for controlling semi-closed heat pump drying equipment and semi-closed heat pump drying equipment |
| CN114115405B (en) * | 2021-12-10 | 2022-06-21 | 华南农业大学 | Multi-section type tobacco leaf drying automatic control system and method |
| CN116755487B (en) * | 2023-08-14 | 2024-01-02 | 宁德时代新能源科技股份有限公司 | Drying equipment, control method and device thereof and storage medium |
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| CN109588755A (en) * | 2018-11-28 | 2019-04-09 | 湖南科技大学 | Interior circulating dehumidification bulk curing barn baking system |
| CN209300231U (en) * | 2018-12-03 | 2019-08-27 | 农业部南京农业机械化研究所 | A kind of air source heat pump fruit and vegetable drier based on lateral ventilation structure |
| CN110274443B (en) * | 2019-07-17 | 2024-05-31 | 珠海格力电器股份有限公司 | Heat pump drying system and heat pump drying unit |
| CN111588066A (en) * | 2020-06-29 | 2020-08-28 | 广东依明机械科技有限公司 | Double-backheating combined cycle heat pump drying system |
| CN112304040A (en) * | 2020-10-29 | 2021-02-02 | 广东海悟科技有限公司 | Method for controlling dry-wet bulb temperature of dryer, computer storage medium and dryer |
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