Method, controller, system and cigarette making machine for temperature control of circulating air flow in a fluidized bed

Abstract

The application relates to a temperature control method, a controller, a system and a cigarette making group of a circulating airflow in a fluidized bed. The temperature control method in the application obtains an opening degree adjustment amount of a flow regulating valve based on a PID control algorithm through preset airflow temperature and collected airflow temperature signals, obtains a target opening degree according to the opening degree adjustment amount and the opening degree before adjustment, adjusts the opening degree of the flow regulating valve according to the target opening degree, can control the flow of the cooling liquid in the cooling liquid pipeline, can effectively adjust the temperature of the circulating liquid, can adjust the temperature of the circulating airflow in the fluidized bed, can effectively reduce the volatilization of the aroma and moisture of the tobacco, can effectively improve the quality of the tobacco, and can effectively improve the taste of the cigarette.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of tobacco mechanical equipment, and particularly relates to a temperature control method, a controller, a system and a cigarette making and connecting machine for circulating airflow in a fluidized bed. BACKGROUND

[0002] The cigarette making and connecting machine in the current tobacco production machine generally adopts a fluidized bed to separate cut tobacco and stem and to convey the cut tobacco.

[0003] The cigarette making and connecting machine generally comprises a circulating fan, an air distribution box, a fluidized bed, a cyclone dust collector and an air pipe. The air outlet of the circulating fan is in communication with the air inlet of the air distribution box. The air outlet of the air distribution box is in communication with the fluidized bed. The air inlet of the air pipe is located above the fluidized bed. The air outlet of the air pipe is in communication with the air inlet of the cyclone dust collector. The air outlet of the cyclone dust collector is in communication with the air inlet of the circulating fan. The airflow generated by the circulating fan is conveyed to the fluidized bed through the air distribution box to provide airflow for primary separation and secondary separation of the cut tobacco in the fluidized bed. After the separation of the cut tobacco and the stem and the flexible conveying of the cut tobacco are completed, the airflow in the fluidized bed flows into the cyclone dust collector through the air pipe. After dust removal by the cyclone dust collector, most of the airflow returns to the circulating fan to form an internal airflow circulation loop. However, as the cigarette making and connecting machine continuously operates, the temperature inside the cigarette making and connecting machine continuously rises, so that the temperature of the circulating airflow conveyed to the fluidized bed continuously rises. The excessively high temperature of the circulating airflow in the fluidized bed increases the volatilization of the aroma and moisture of the cut tobacco, reduces the quality of the cut tobacco and affects the taste of the cigarette. SUMMARY

[0004] The application aims to provide a temperature control method for circulating airflow in a fluidized bed. The temperature control method for circulating airflow in a fluidized bed can adjust the temperature of the circulating airflow in the fluidized bed, effectively reduce the volatilization of the aroma and moisture of the cut tobacco, effectively improve the quality of the cut tobacco and effectively improve the taste of the cigarette.

[0005] The technical scheme provided by the application is as follows:

[0006] A temperature control method for circulating airflow in a fluidized bed is applied to an airflow temperature adjusting device. The airflow temperature adjusting device comprises a circulating liquid circuit, a cooling liquid pipeline, a first heat exchanger, a second heat exchanger, a flow regulating valve, a driving water pump and an airflow temperature sensor. The driving water pump is arranged on the circulating liquid circuit. The circulating liquid in the circulating pipeline and the circulating airflow flow through the first heat exchanger to exchange heat. The circulating liquid in the circulating liquid circuit and the cooling liquid in the cooling liquid pipeline flow through the second heat exchanger to exchange heat. The method comprises the following steps:

[0007] acquiring a gas flow temperature signal of the circulating gas flow collected by the gas flow temperature sensor;

[0008] obtaining an opening degree adjustment amount of the flow regulating valve based on a PID control algorithm according to the gas flow temperature signal and a preset gas flow temperature;

[0009] obtaining a target opening degree according to the opening degree adjustment amount and the opening degree before adjustment;

[0010] adjusting the opening degree of the flow regulating valve according to the target opening degree to control the flow of the cooling liquid in the cooling liquid pipeline.

[0011] Optionally, the gas flow temperature regulating device further comprises a flow meter, and after the opening degree of the flow regulating valve is controlled based on the PID control algorithm according to the gas flow temperature signal and the preset gas flow temperature, the method further comprises:

[0012] determining whether the target opening degree is equal to a threshold opening degree;

[0013] if the target opening degree is equal to the threshold opening degree, controlling to increase the rotating speed of the driving water pump;

[0014] acquiring a flow signal of the circulating liquid in the circulating liquid loop collected by the flow meter;

[0015] determining whether the flow signal is greater than a preset threshold flow;

[0016] if the flow signal is greater than the preset threshold flow, controlling to decrease the rotating speed of the driving water pump and recording the number of times that the flow signal is greater than the preset threshold flow;

[0017] determining whether the number of times is equal to a preset number of times;

[0018] if the number of times is equal to the preset number of times, controlling to increase the flow rate of the cooling liquid or decrease the temperature of the cooling liquid.

[0019] Optionally, the gas flow temperature regulating device further comprises a liquid temperature sensor, and the method further comprises:

[0020] acquiring a liquid temperature signal of the circulating liquid in the circulating liquid loop collected by the liquid temperature sensor;

[0021] adjusting the opening degree of the flow regulating valve according to the liquid temperature signal and a preset liquid temperature until the real-time liquid temperature signal collected by the liquid temperature sensor is greater than or equal to the preset liquid temperature.

[0022] Optionally, the airflow temperature adjusting device further comprises: an inlet pipeline and an outlet pipeline in communication with the circulating liquid circuit, a first electromagnetic valve arranged on the inlet pipeline, a second electromagnetic valve arranged on the outlet pipeline, a third electromagnetic valve, and a pressure sensor, the circulating liquid circuit comprises a first sub-pipeline and a second sub-pipeline, the third electromagnetic valve is arranged on the first sub-pipeline, the pressure sensor and the driving water pump are arranged on the second sub-pipeline, before the airflow temperature signal of the circulating airflow collected by the airflow temperature sensor is acquired, the method further comprises:

[0023] controlling the first electromagnetic valve and the second electromagnetic valve to open, and controlling the third electromagnetic valve to close;

[0024] controlling hot liquid to be injected into the inlet pipeline and lasting for a first preset time length, and then controlling the first electromagnetic valve and the second electromagnetic valve to close.

[0025] acquiring a liquid pressure signal of the second sub-pipeline collected by the pressure sensor;

[0026] judging whether the liquid pressure signal is equal to a preset pressure signal;

[0027] if the liquid pressure signal is equal to the preset pressure signal, controlling the first electromagnetic valve to close, and controlling the third electromagnetic valve to open and the driving water pump to start.

[0028] Optionally, the method further comprises:

[0029] when receiving a circulating fan stop signal, controlling the flow regulating valve to close, and controlling the driving water pump to stop;

[0030] controlling the first electromagnetic valve and the second electromagnetic valve to open, and controlling the third electromagnetic valve to close;

[0031] controlling hot liquid to be injected into the inlet pipeline and lasting for a second preset time length, and then controlling the first electromagnetic valve and the second electromagnetic valve to close.

[0032] The application also provides a circulating airflow temperature controller applied to an airflow temperature adjusting device, the airflow temperature adjusting device comprising a circulating liquid circuit, a cooling liquid pipeline, a first heat exchanger, a second heat exchanger, a flow regulating valve, a driving water pump, and an airflow temperature sensor, the driving water pump being arranged on the circulating liquid circuit, circulating liquid in the circulating pipeline and circulating airflow passing through the first heat exchanger for heat exchange, circulating liquid in the circulating liquid circuit and cooling liquid in the cooling liquid pipeline passing through the second heat exchanger for heat exchange, the controller comprising:

[0033] a first acquisition module for acquiring an airflow temperature signal of the circulating airflow collected by the airflow temperature sensor;

[0034] a first processing module, configured to obtain an opening degree adjustment amount of the flow regulating valve based on a PID control algorithm according to the airflow temperature signal and a preset airflow temperature;

[0035] a second processing module, configured to obtain a target opening degree according to the opening degree adjustment amount and an opening degree before adjustment;

[0036] an adjusting module, configured to adjust the opening degree of the flow regulating valve according to the target opening degree, so as to control the flow of the cooling liquid in the cooling liquid pipeline.

[0037] Optionally, the airflow temperature adjusting device further comprises a flow meter, and the controller further comprises:

[0038] a first judging module, configured to judge whether the target opening degree is equal to a threshold opening degree;

[0039] a first control module, configured to control to increase the rotating speed of the driving water pump when the target opening degree is equal to the threshold opening degree;

[0040] a second obtaining module, configured to obtain a flow signal of circulating liquid in the circulating liquid loop collected by the flow meter;

[0041] a second judging module, configured to judge whether the flow signal is greater than a preset threshold flow;

[0042] a second control module, configured to control to decrease the rotating speed of the driving water pump and record a number of times that the flow signal is greater than the preset threshold flow when the flow signal is greater than the preset threshold flow;

[0043] a third judging module, configured to judge whether the number of times is equal to a preset number of times;

[0044] a third control module, configured to control to increase the flow rate of the cooling liquid or decrease the temperature of the cooling liquid when the number of times is equal to the preset number of times.

[0045] Optionally, the airflow temperature adjusting device further comprises a liquid temperature sensor, and the controller further comprises:

[0046] a third obtaining module, configured to obtain a liquid temperature signal of circulating liquid in the circulating liquid loop collected by the liquid temperature sensor;

[0047] a second adjusting module, configured to adjust the opening degree of the flow regulating valve according to the liquid temperature signal and a preset liquid temperature, until a real-time liquid temperature signal collected by the liquid temperature sensor is greater than or equal to the preset liquid temperature.

[0048] Optionally, the airflow temperature adjusting device further comprises: an inlet pipeline and an outlet pipeline in communication with the circulating liquid circuit, a first electromagnetic valve arranged on the inlet pipeline, a second electromagnetic valve arranged on the outlet pipeline, a third electromagnetic valve, and a pressure sensor, the circulating liquid circuit comprises a first sub-pipeline and a second sub-pipeline, the third electromagnetic valve is arranged on the first sub-pipeline, the pressure sensor and the driving water pump are arranged on the second sub-pipeline, and the controller further comprises:

[0049] a fourth control module configured to control the first electromagnetic valve and the second electromagnetic valve to be opened and control the third electromagnetic valve to be closed;

[0050] a fifth control module configured to control hot liquid to be injected into the inlet pipeline and last for a first preset time length, and then control the second electromagnetic valve to be closed;

[0051] a fourth acquisition module configured to acquire a liquid pressure signal of the second sub-pipeline collected by the pressure sensor;

[0052] a fourth judgment module configured to judge whether the liquid pressure signal is equal to a preset pressure signal;

[0053] a sixth control module configured to, when the liquid pressure signal is equal to the preset pressure signal, control the first electromagnetic valve to be closed, and control the third electromagnetic valve to be opened and the driving water pump to be started.

[0054] Optionally, the controller further comprises:

[0055] a seventh control module configured to, when receiving a circulating fan stop signal, control the flow regulating valve to be closed and the driving water pump to be stopped;

[0056] an eighth control module configured to control the first electromagnetic valve and the second electromagnetic valve to be opened and control the third electromagnetic valve to be closed;

[0057] a ninth control module configured to control hot liquid to be injected into the inlet pipeline and last for a second preset time length, and then control the first electromagnetic valve and the second electromagnetic valve to be closed.

[0058] The application also provides a circulating airflow temperature control system, comprising the circulating airflow temperature controller and the airflow temperature adjusting device according to any one of the preceding embodiments; wherein the airflow temperature adjusting device comprises a circulating liquid circuit, a cooling liquid pipeline, a first heat exchanger, a second heat exchanger, a flow regulating valve, a driving water pump, and an airflow temperature sensor; wherein:

[0059] the driving water pump is arranged on the circulating liquid circuit, and the driving water pump is configured to drive circulating liquid in the circulating liquid circuit to flow;

[0060] The flow regulating valve is arranged on the cooling liquid pipeline and is used for regulating the flow of the cooling liquid in the cooling liquid pipeline.

[0061] The circulating liquid in the circulating liquid loop and the cooling liquid in the cooling liquid pipeline flow through the second heat exchanger for heat exchange.

[0062] The circulating liquid in the circulating liquid loop and the cooling liquid in the cooling liquid pipeline flow through the second heat exchanger for heat exchange.

[0063] The airflow temperature sensor is used for collecting an airflow temperature signal of the circulating airflow.

[0064] Optionally, the airflow temperature regulating device further comprises a flow meter.

[0065] The flow meter is arranged on the circulating liquid loop and is used for collecting a flow signal of the circulating liquid in the circulating liquid loop.

[0066] Optionally, the airflow temperature regulating device further comprises a liquid temperature sensor.

[0067] The liquid temperature sensor is arranged on the circulating liquid loop and is used for collecting a liquid temperature signal of the circulating liquid in the circulating liquid loop.

[0068] Optionally, the circulating liquid loop comprises a first sub-pipeline and a second sub-pipeline, and the airflow temperature regulating device further comprises an inlet pipeline and an outlet pipeline in communication with the circulating liquid loop, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a pressure sensor.

[0069] The first electromagnetic valve is arranged on the inlet pipeline.

[0070] The second electromagnetic valve is arranged on the outlet pipeline.

[0071] The third electromagnetic valve is arranged on the first sub-pipeline.

[0072] The pressure sensor and the driving water pump are arranged on the second sub-pipeline.

[0073] Optionally, the airflow temperature regulating device further comprises a pressure balance tank and an exhaust valve.

[0074] The pressure balance tank and the exhaust valve are arranged on the circulating liquid loop.

[0075] The pressure balance tank is used for balancing the pressure of the circulating liquid in the circulating liquid loop.

[0076] The exhaust valve is used for discharging air bubbles in the circulating liquid in the circulating liquid loop.

[0077] The application also provides a cigarette making machine group, comprising the circulating air flow temperature control system, the circulating fan, the air distribution box, the fluidized bed, the cyclone dust collector and the air pipe.

[0078] The first heat exchanger in the air flow temperature adjusting device in the circulating air flow temperature control system is arranged between the cyclone dust collector and the circulating fan.

[0079] The air outlet of the circulating fan is communicated with the air inlet of the air distribution box.

[0080] The air outlet of the air distribution box is communicated with the fluidized bed.

[0081] The air inlet of the air pipe is located above the fluidized bed.

[0082] The air outlet of the air pipe is communicated with the air inlet of the cyclone dust collector.

[0083] The air outlet of the cyclone dust collector is communicated with the air inlet of the circulating fan.

[0084] Compared with the prior art, the circulating air flow temperature control method in the fluidized bed provided by the application is applied to the air flow temperature adjusting device, in the application, the circulating water is always circulated in the circulating liquid circuit under the action of the water pump, the circulating water enters the first heat exchanger to exchange heat with the circulating air flow, so that the temperature of the circulating air flow is lowered, the circulating water is heated to become high-temperature water, and the circulating water continues to flow and exchanges heat with the external cooling water in the second heat exchanger, and the circulating water becomes low-temperature water again and flows back to the water pump, the circulating water is thus circulated, the circulating air flow is lowered in temperature, the opening degree adjustment amount of the flow regulating valve is obtained based on the PID control algorithm according to the preset air flow temperature and the collected air flow temperature signal, the target opening degree is obtained according to the opening degree adjustment amount and the opening degree before adjustment, and the opening degree of the flow regulating valve is adjusted according to the target opening degree, so that the flow of the cooling liquid in the cooling liquid pipeline can be controlled, the temperature of the circulating liquid can be effectively adjusted, the temperature of the circulating air flow in the fluidized bed can be adjusted, and the volatilization of the aroma and moisture of the cut tobacco can be effectively reduced, the quality of the cut tobacco can be effectively improved, and the taste of the cigarette can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0085] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0086] Figure 1A flowchart of a temperature control method of a circulating gas flow in a fluidized bed according to an embodiment of the present application is shown in FIG. 1.

[0087] Figure 2 A block diagram of a temperature controller of a circulating gas flow according to an embodiment of the present application is shown in FIG. 2.

[0088] Figure 3 A structural diagram of a gas flow temperature adjusting device according to an embodiment of the present application is shown in FIG. 3.

[0089] Figure 4 A structural diagram of another gas flow temperature adjusting device according to an embodiment of the present application is shown in FIG. 4.

[0090] Figure 5 A block diagram of a temperature control system of a circulating gas flow according to an embodiment of the present application is shown in FIG. 5.

[0091] Figure 6 A structural diagram of a cigarette making machine group according to an embodiment of the present application is shown in FIG. 6. DETAILED DESCRIPTION

[0092] In order to enable a person skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor fall within the scope of protection of the present application.

[0093] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0094] It should be understood that the terms “length”, “width”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0095] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of the technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" or "several" is two or more, unless otherwise explicitly and specifically limited.

[0096] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of the present application are only used to cooperate with the disclosed content, to be understood and read by those skilled in the art, and do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, which does not affect the effect and purpose that can be achieved by the present application, should still fall within the scope of the disclosed technical content.

[0097] As shown in Figure 1 The present application provides a temperature control method for circulating gas flow in a fluidized bed, which is applied to a gas flow temperature adjusting device. The gas flow temperature adjusting device includes a circulating liquid circuit, a cooling liquid pipeline, a first heat exchanger, a second heat exchanger, a flow regulating valve, a driving water pump and a gas flow temperature sensor. The driving water pump is arranged on the circulating liquid circuit. The circulating liquid in the circulating pipeline and the circulating gas flow flow through the first heat exchanger for heat exchange. The circulating liquid in the circulating liquid circuit and the cooling liquid in the cooling liquid pipeline flow through the second heat exchanger for heat exchange. The method includes the following steps:

[0098] S101, acquiring a gas flow temperature signal of the circulating gas flow collected by the gas flow temperature sensor;

[0099] In the present embodiment, the gas flow temperature sensor can be arranged between the first heat exchanger and the fluidized bed. The gas flow temperature sensor is used to acquire the gas flow temperature signal of the circulating gas flow after the circulating gas flow and the circulating liquid in the circulating pipeline flow through the first heat exchanger for heat exchange.

[0100] S102, obtaining an opening degree adjusting amount of the flow regulating valve based on a PID control algorithm according to the gas flow temperature signal and a preset gas flow temperature;

[0101] In the present embodiment, the flow regulating valve can be a three-way proportional valve. The circulating liquid can be circulating water. The cooling liquid can be cooling water. The preset gas flow temperature can be the gas flow temperature set by setting the temperature setting button on the gas flow temperature adjusting device. After the preparation work before the operation of the gas flow temperature adjusting device is completed, the gas flow temperature is set t 气, click the start button, the water pump to start running, the circulating water in the circulating water circuit under the action of the pump is always circulating flow, circulating water into the first heat exchanger and circulating gas flow heat transfer, so that the temperature of the circulating gas flow drops, circulating water heated to high temperature water, circulating water continues to flow, in the second heat exchanger with external cooling water heat exchange, circulating water again into low temperature water flow back to the pump, circulating water so circulating flow, circulating gas flow temperature drops.

[0102] In this embodiment, the PID control algorithm can be incremental PID control algorithm, incremental PID control algorithm is according to the gas temperature sensor collected gas temperature signal and the preset gas temperature, the current time control amount, according to the difference between the current time control amount and the last time control amount recursive calculation error correction algorithm, the specific calculation formula is:

[0103] ;

[0104] ;

[0105] Wherein, is the current time control amount, is the last time control amount, is the last time control amount of, Kp is the proportional coefficient, Ki is the integral coefficient, Kd is the differential coefficient, t 气 is the preset gas temperature, t(x) is the gas temperature signal, ΔU(n) is the opening increment of three way proportional valve (i.e. opening adjustment amount).

[0106] S103, according to the opening adjustment amount and the opening before adjustment, the target opening is obtained;

[0107] In this embodiment, according to the opening adjustment amount and the opening before adjustment, the predicted adjusted opening can be obtained, and the specific calculation formula is as follows:

[0108] U(n) = U(n-1) + ∆U(n);

[0109] Wherein, ∆U(n) is the opening adjustment amount, U(n-1) is the opening before adjustment, and U(n) is the predicted adjusted opening.

[0110] When U(n)≤the minimum opening degree 0 of the three-way proportional valve, the target opening degree of the three-way electromagnetic valve is determined as 0; when U(n)≥the maximum opening degree Umax of the three-way proportional valve, the target opening degree of the three-way proportional valve is determined as Umax; when 0

[0111] S104, adjust the opening degree of the flow regulating valve according to the target opening degree to control the flow of the cooling liquid in the cooling liquid pipeline.

[0112] In the embodiment, the opening degree of the flow regulating valve can be adjusted to the target opening degree, and by adjusting the opening degree of the flow regulating valve, the flow of the cooling liquid in the cooling liquid pipeline can be controlled.

[0113] Compared with the prior art, the temperature control method of the circulating gas flow in the fluidized bed provided by the application is applied to the gas flow temperature adjusting device. In the application, the circulating water continuously circulates in the circulating liquid loop under the action of the water pump. The circulating water enters the first heat exchanger to exchange heat with the circulating gas flow, so that the temperature of the circulating gas flow decreases. The circulating water is heated to become high-temperature water. The circulating water continues to flow and exchanges heat with the external cooling water in the second heat exchanger. The circulating water becomes low-temperature water again and flows back to the water pump. The circulating water circulates in this way, and the circulating gas flow is cooled by the circulating water. Based on the PID control algorithm, the opening degree adjustment amount of the flow regulating valve is obtained according to the preset gas flow temperature and the collected gas flow temperature signal. The target opening degree is obtained according to the opening degree adjustment amount and the opening degree before adjustment. The opening degree of the flow regulating valve is adjusted according to the target opening degree. The flow of the cooling liquid in the cooling liquid pipeline can be controlled, the temperature of the circulating liquid can be effectively adjusted, the temperature of the circulating gas flow in the fluidized bed can be adjusted, and the volatilization of the aroma and moisture of the tobacco can be effectively reduced, the quality of the tobacco can be effectively improved, and the taste of the cigarette can be effectively improved.

[0114] As an embodiment, in the embodiment of the application, the gas flow temperature adjusting device further comprises a flow meter. After step S103, the method further comprises:

[0115] S201, determine whether the target opening degree is equal to the threshold opening degree;

[0116] In the embodiment, step S201 can be performed before step S104 or after step S104. Preferably, step S201 is performed after step S104.

[0117] In the embodiment, the threshold opening degree is the maximum opening degree Umax of the three-way proportional valve.

[0118] S202, if the target opening degree is equal to the threshold opening degree, control the water pump to increase the rotating speed;

[0119] In the embodiment, if the target opening degree is equal to the threshold opening degree, the rotating speed of the water pump is controlled to be increased, and the increase of the rotating speed of the water pump will increase the flow rate and the flow per unit volume of the circulating liquid in the circulating liquid circuit.

[0120] S203, acquiring a flow signal of the circulating liquid in the circulating liquid circuit collected by the flow meter;

[0121] In the embodiment, the flow meter is arranged in the pipeline of the circulating liquid circuit, and the flow signal of the circulating liquid in the circulating liquid circuit can be acquired by the flow meter.

[0122] S204, judging whether the flow signal is greater than a preset threshold flow;

[0123] In the embodiment, the preset threshold flow is a threshold flow preset in the controller. Qmax.

[0124] S205, if the flow signal is greater than the preset threshold flow, the rotating speed of the water pump is controlled to be decreased, and the number of times that the flow signal is greater than the preset threshold flow is recorded;

[0125] In the embodiment, in order to avoid leakage of the first heat exchanger and the second heat exchanger, the flow in the circulating liquid circuit cannot exceed the preset threshold flow Qmax, If the flow signal is greater than the preset threshold flow, the rotating speed of the water pump is controlled to be decreased to reduce the flow per unit volume in the circulating liquid circuit, and the number of times that the flow signal is greater than the preset threshold flow is recorded, that is, the first time that the flow signal is greater than the preset threshold flow is recorded as the first time, and the second time that the flow signal is greater than the preset threshold flow is recorded as the second time. A counter is arranged in the controller, and the counter can be used to record the number of times that the flow signal is greater than the preset threshold flow.

[0126] S206, judging whether the number of times is equal to a preset number of times;

[0127] In the embodiment, the preset number of times is a number of times preset in the controller.

[0128] S207, if the number of times is equal to the preset number of times, the flow rate of the cooling liquid is controlled to be increased or the temperature of the cooling liquid is controlled to be decreased.

[0129] In the embodiment, if the number of times is equal to the preset number of times, the flow rate of the cooling liquid can be controlled to be increased or the temperature of the cooling liquid can be controlled to be decreased by controlling the cooling liquid driving device or the cooling liquid supply device, so as to increase the cooling speed and the cooling effect of the circulating gas flow.

[0130] As an implementation manner, in the embodiment, the gas flow temperature adjusting device further comprises a liquid temperature sensor, and the method further comprises:

[0131] S301, acquire a liquid temperature signal of circulating liquid in the circulating liquid loop collected by a liquid temperature sensor;

[0132] In this embodiment, step S301 can be before or after step S101, and preferably before step S101.

[0133] In this embodiment, the liquid temperature sensor can be arranged in or on the pipeline before the water inlet of the first heat exchanger and after the water outlet of the second heat exchanger. After the water pump is started and runs for a preset time, the liquid temperature sensor detects the liquid temperature signal of the cooled circulating liquid.

[0134] S302, adjust the opening of the flow regulating valve according to the liquid temperature signal and the preset liquid temperature, until the real-time liquid temperature signal collected by the liquid temperature sensor is greater than or equal to the preset liquid temperature.

[0135] In this embodiment, to prevent condensate from being generated on the pipeline in the circulating liquid loop, the temperature of the circulating liquid needs to be set above the air dew point temperature in the workshop room. The air dew point temperature can be obtained by on-site detection. The preset liquid temperature can be set as the detected air dew point temperature. The liquid temperature signal detected by the liquid temperature sensor and the preset liquid temperature are compared. When the liquid temperature signal is less than the preset liquid temperature, it indicates that the temperature of the circulating liquid is too low, and the flow regulating valve is controlled to be completely closed, i.e., the opening of the flow regulating valve is 0. After the flow regulating valve is closed, the external cooling liquid will no longer flow into the second heat exchanger, and the temperature of the circulating liquid will slowly rise. The liquid temperature sensor detects the real-time liquid temperature signal of the adjusted circulating liquid after a preset time (e.g., 2s). If the real-time liquid temperature signal is greater than or equal to the preset liquid temperature, the flow regulating valve is controlled to be opened, i.e., the opening of the flow regulating valve is adjusted to be greater than 0. If the real-time liquid temperature signal is still less than the preset liquid temperature, the liquid temperature sensor detects the real-time liquid temperature signal of the adjusted circulating liquid again after a preset time (e.g., 2s). Until the real-time liquid temperature signal collected by the liquid temperature sensor is greater than or equal to the preset liquid temperature, the flow regulating valve is controlled to be opened.

[0136] As an embodiment, in the embodiment of the present application, the airflow temperature adjusting device further comprises: an inlet pipeline and an outlet pipeline in communication with the circulating liquid loop, a first electromagnetic valve arranged on the inlet pipeline, a second electromagnetic valve arranged on the outlet pipeline, a third electromagnetic valve, and a pressure sensor. The circulating liquid loop comprises a first sub-pipeline and a second sub-pipeline. The third electromagnetic valve is arranged on the first sub-pipeline. The pressure sensor and the water pump are arranged on the second sub-pipeline. Before step S101, the method further comprises:

[0137] S401, control the first electromagnetic valve and the second electromagnetic valve to be opened, and control the third electromagnetic valve to be closed;

[0138] In this embodiment, step S401 can be performed before step S301.

[0139] S402, control the injection of normal temperature liquid into the inlet pipeline and continue for a first preset time, and control the second electromagnetic valve to close;

[0140] In this embodiment, since the first electromagnetic valve and the second electromagnetic valve are in an open state and the third electromagnetic valve is in a closed state, the normal temperature liquid can be transported from the inlet of the inlet pipeline, flow through the inlet pipeline and then be transported to the second sub-pipeline of the circulation pipeline, flow out through the outlet of the outlet pipeline communicated with the second sub-pipeline, so that most of the gas in the circulation liquid path is discharged, and after the injection of the normal temperature liquid and the continuation for the first preset time, the second electromagnetic valve is controlled to close.

[0141] S403, acquiring the liquid pressure signal in the second sub-pipeline collected by the pressure sensor;

[0142] In this embodiment, the pressure sensor can be arranged on the first sub-pipeline, and the pressure sensor can collect the liquid pressure signal in the second sub-pipeline.

[0143] S404, judging whether the liquid pressure signal is equal to a preset pressure signal;

[0144] In this embodiment, the preset pressure signal can be a pressure signal preset in the controller.

[0145] S405, if the liquid pressure signal is equal to the preset pressure signal, the first electromagnetic valve is controlled to close, the third electromagnetic valve is controlled to open, and the water pump is controlled to start.

[0146] In this embodiment, if the liquid pressure signal is equal to the preset pressure signal, the first electromagnetic valve is controlled to close, the third electromagnetic valve is controlled to open, and the water pump is controlled to start. The circulation liquid will circulate in the first sub-pipeline and the second sub-pipeline by the driving of the water pump. An exhaust valve can be arranged on the first sub-pipeline or the second sub-pipeline. Preferably, the exhaust valve is arranged on the first sub-pipeline. The trace amount of air contained in the water will be filtered and discharged to the outside of the pipeline by the exhaust valve.

[0147] A pressure balance tank can be arranged on the first sub-pipeline or the second sub-pipeline. The pressure balance tank balances the pressure in the pipeline, so as to avoid the occurrence of instantaneous excessive pressure in the pipeline.

[0148] After the water pump continuously operates for a preset time, the water pump will automatically stop, and the water preparation work is completed. The water pump can be started again when it is needed to cool the circulating air flow.

[0149] As an implementation manner, in the embodiment of the application, the method further comprises:

[0150] S501、in the receiving circulating fan stop signal, control flow regulating valve closed, and control drive water pump stop;

[0151] In this embodiment, when the fluidized bed is in the receiving stop signal stop running of cigarette making machine group, the circulating fan stops rotating, the controller will receive the circulating fan stop signal, in the receiving circulating fan stop signal, means that the circulating air flow is not needed to be cooled, control flow regulating valve closed, so that the cooling liquid stop flowing into the second heat exchanger, control drive water pump stop, so that the circulating liquid stop circulating flow.

[0152] S502、control the first solenoid valve and the second solenoid valve open, and control the third solenoid valve closed;

[0153] S503、control to inject hot liquid into the inlet pipeline and continue for a second preset time length, control the first solenoid valve and the second solenoid valve closed.

[0154] In this embodiment, the hot liquid can be hot water, and the temperature of the hot liquid can be similar to the temperature of the air flow. Since the first solenoid valve and the second solenoid valve are in the open state, and the third solenoid valve is in the closed state, the hot liquid is injected into the inlet pipeline. The hot liquid enters the second sub-pipeline through the inlet of the inlet pipeline, and the circulating liquid originally lower than the temperature of the hot liquid in the second sub-pipeline is discharged through the outlet of the outlet pipeline. After the hot liquid is continuously supplied for a second preset time length, the first solenoid valve and the second solenoid valve are controlled to be closed, and the supply of the hot liquid is stopped. At this time, the circulating liquid with lower temperature in the circulating liquid circuit is replaced by the hot liquid, and the temperature of the first heat exchanger is close to the temperature of the external air, which can effectively avoid the generation of condensate water in the first heat exchanger during the shutdown stage.

[0155] As shown in Figure 2 The application also provides a circulating air flow temperature controller, which is applied to the air flow temperature adjusting device, as shown in Figure 3 The air flow temperature adjusting device comprises a circulating liquid circuit 201, a cooling liquid pipeline 202, a first heat exchanger 203, a second heat exchanger 204, a flow regulating valve 205, a drive water pump 206 and an air flow temperature sensor 207. The drive water pump 206 is arranged on the circulating liquid circuit 201. The circulating liquid in the circulating pipeline and the circulating air flow flow through the first heat exchanger 203 for heat exchange. The circulating liquid in the circulating liquid circuit 201 and the cooling liquid in the cooling liquid pipeline 202 flow through the second heat exchanger 204 for heat exchange. The controller comprises:

[0156] The first acquisition module 101 is used for acquiring the air flow temperature signal of the circulating air flow collected by the air flow temperature sensor 207.

[0157] The first processing module 102 is used for obtaining the opening degree adjustment amount of the flow regulating valve 205 based on the PID control algorithm according to the air flow temperature signal and the preset air flow temperature.

[0158] The second processing module 103 is configured to obtain a target opening degree according to the opening degree adjustment amount and the opening degree before the adjustment.

[0159] The adjusting module 104 is configured to adjust the opening degree of the flow regulating valve 205 according to the target opening degree, so as to control the flow of the cooling liquid in the cooling liquid pipeline 202.

[0160] As shown in Figure 4 As an embodiment, the airflow temperature adjusting device further comprises a flow meter 208, and the controller further comprises:

[0161] The first judging module is configured to judge whether the target opening degree is equal to a threshold opening degree.

[0162] The first control module is configured to control the driving water pump 206 to increase the rotating speed when the target opening degree is equal to the threshold opening degree.

[0163] The second obtaining module is configured to obtain a flow signal of the circulating liquid in the circulating liquid loop 201 collected by the flow meter 208.

[0164] The second judging module is configured to judge whether the flow signal is greater than a preset threshold flow.

[0165] The second control module is configured to control the driving water pump 206 to decrease the rotating speed when the flow signal is greater than the preset threshold flow, and record the number of times that the flow signal is greater than the preset threshold flow.

[0166] The third judging module is configured to judge whether the number of times is equal to a preset number of times.

[0167] The third control module is configured to control the flow rate of the cooling liquid to increase or the temperature of the cooling liquid to decrease when the number of times is equal to the preset number of times.

[0168] As shown in Figure 4 As an embodiment, the airflow temperature adjusting device further comprises a liquid temperature sensor 209, and the controller further comprises:

[0169] The third obtaining module is configured to obtain a liquid temperature signal of the circulating liquid in the circulating liquid loop 201 collected by the liquid temperature sensor 209.

[0170] The second adjusting module is configured to adjust the opening degree of the flow regulating valve 205 according to the liquid temperature signal and a preset liquid temperature, until the real-time liquid temperature signal collected by the liquid temperature sensor 209 is greater than or equal to the preset liquid temperature.

[0171] As shown in Figure 4As shown, as an embodiment, the air flow temperature adjusting device in the embodiment of the application further comprises: an inlet pipeline 210 and an outlet pipeline 211 in communication with the circulating liquid loop 201, a first electromagnetic valve 212 arranged on the inlet pipeline 210, a second electromagnetic valve 213 arranged on the outlet pipeline 211, a third electromagnetic valve 214 and a pressure sensor 215, the circulating liquid loop 201 comprises a first sub-pipeline 2011 and a second sub-pipeline 2012, the third electromagnetic valve 214 is arranged on the first sub-pipeline 2011, the pressure sensor 215 and the driving water pump 206 are arranged on the second sub-pipeline 2012, and the controller further comprises:

[0172] A fourth control module is configured to control the first electromagnetic valve 212 and the second electromagnetic valve 213 to be opened and control the third electromagnetic valve 214 to be closed.

[0173] A fifth control module is configured to control hot liquid to be injected into the inlet pipeline 210 and last for a first preset time length, and then control the second electromagnetic valve 213 to be closed.

[0174] A fourth acquisition module is configured to acquire a liquid pressure signal of the second sub-pipeline 2012 collected by the pressure sensor 215.

[0175] A fourth judgment module is configured to judge whether the liquid pressure signal is equal to a preset pressure signal.

[0176] A sixth control module is configured to control the first electromagnetic valve 212 to be closed, and control the third electromagnetic valve 214 to be opened and the driving water pump 206 to be started when the liquid pressure signal is equal to the preset pressure signal.

[0177] As an embodiment, the controller further comprises:

[0178] A seventh control module is configured to control the flow regulating valve 205 to be closed and control the driving water pump 206 to be stopped when a circulating fan stop signal is received.

[0179] An eighth control module is configured to control the first electromagnetic valve 212 and the second electromagnetic valve 213 to be opened and control the third electromagnetic valve 214 to be closed.

[0180] A ninth control module is configured to control hot liquid to be injected into the inlet pipeline 210 and last for a second preset time length, and then control the first electromagnetic valve 212 and the second electromagnetic valve 213 to be closed.

[0181] As shown, Figure 5 The application further provides a circulating air flow temperature control system, comprising the circulating air flow temperature controller and the air flow temperature adjusting device according to any one of the above, wherein, Figure 3As shown in the figure, the air flow temperature adjusting device comprises a circulating liquid loop 201, a cooling liquid pipeline 202, a first heat exchanger 203, a second heat exchanger 204, a flow regulating valve 205, a water pump 206 and an air flow temperature sensor 207; wherein: the water pump 206 is arranged on the circulating liquid loop 201, and is used to drive the circulating liquid in the circulating liquid loop 201 to flow; the flow regulating valve 205 is arranged on the cooling liquid pipeline 202, and is used to regulate the flow of the cooling liquid in the cooling liquid pipeline 202; the circulating liquid in the circulating pipeline and the circulating air flow flow through the first heat exchanger 203 to exchange heat; the circulating liquid in the circulating liquid loop 201 and the cooling liquid in the cooling liquid pipeline 202 flow through the second heat exchanger 204 to exchange heat; the air flow temperature sensor 207 is used to collect the air flow temperature signal of the circulating air flow.

[0182] As shown in the figure, Figure 4 As an embodiment, the air flow temperature adjusting device further comprises a flow meter 208; the flow meter 208 is arranged on the circulating liquid loop 201, and is used to collect the flow signal of the circulating liquid in the circulating liquid loop 201.

[0183] As shown in the figure, Figure 4 As an embodiment, the air flow temperature adjusting device further comprises a liquid temperature sensor 209; the liquid temperature sensor 209 is arranged on the circulating liquid loop 201, and is used to collect the liquid temperature signal of the circulating liquid in the circulating liquid loop 201.

[0184] As shown in the figure, Figure 4 As an embodiment, the circulating liquid loop 201 comprises a first sub-pipeline 2011 and a second sub-pipeline 2012, and the air flow temperature adjusting device further comprises: an inlet pipeline 210 and an outlet pipeline 211 in communication with the circulating liquid loop 201, a first electromagnetic valve 212, a second electromagnetic valve 213, a third electromagnetic valve 214 and a pressure sensor 215; the first electromagnetic valve 212 is arranged on the inlet pipeline 210; the second electromagnetic valve 213 is arranged on the outlet pipeline 211; the third electromagnetic valve 214 is arranged on the first sub-pipeline 2011; and the pressure sensor 215 and the water pump 206 are arranged on the second sub-pipeline 2012.

[0185] As shown in the figure, Figure 4 As an embodiment, the air flow temperature adjusting device further comprises: a pressure balance tank 216 and an exhaust valve 217; the pressure balance tank 216 and the exhaust valve 217 are arranged on the circulating liquid loop 201; the pressure balance tank 216 is used to balance the pressure of the circulating liquid in the circulating liquid loop 201; and the exhaust valve 217 is used to discharge the bubbles in the circulating liquid in the circulating liquid loop 201.

[0186] As shown in the figure, Figure 6As shown, the application further provides a rolling machine group, comprising: the circulating air flow temperature control system of any one of the above, a circulating fan 301, an air distribution box 302, a fluidized bed 303, a cyclone dust collector 304 and an air duct 305; the first heat exchanger 203 in the air flow temperature adjusting device in the circulating air flow temperature control system is arranged between the cyclone dust collector 304 and the circulating fan 301; the air outlet of the circulating fan 301 is in communication with the air inlet of the air distribution box 302; the air outlet of the air distribution box 302 is in communication with the fluidized bed 303; the air inlet of the air duct 305 is located above the fluidized bed 303; the air outlet of the air duct 305 is in communication with the air inlet of the cyclone dust collector 304; and the air outlet of the cyclone dust collector 304 is in communication with the air inlet of the circulating fan 301.

[0187] In the embodiment, the circulating air flow temperature control system and the air flow temperature adjusting device are not shown in the drawings.

[0188] It should be understood that, if "system", "device", "unit" and / or "module" are used in the present application, it is only a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0189] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be mutually referred to.

[0190] The other embodiments are different from each other, and the same or similar parts between the embodiments can be mutually referred to.

[0191] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for temperature control of circulating airflow in a fluidized bed, characterized in that, An airflow temperature regulating device is applied, comprising a circulating liquid circuit, a coolant pipeline, a first heat exchanger, a second heat exchanger, a flow regulating valve, a drive water pump, and an airflow temperature sensor. The drive water pump is installed in the circulating liquid circuit. The circulating liquid and circulating airflow in the circulating liquid circuit exchange heat through the first heat exchanger, and the circulating liquid in the circulating liquid circuit and the coolant in the coolant pipeline exchange heat through the second heat exchanger. The method includes: The airflow temperature signal of the circulating airflow collected by the airflow temperature sensor is acquired; Based on the airflow temperature signal and the preset airflow temperature, the opening adjustment amount of the flow regulating valve is obtained using a PID control algorithm. The target opening is obtained based on the opening adjustment amount and the opening before adjustment; According to the target opening degree, the opening degree of the flow regulating valve is adjusted to control the flow rate of coolant in the coolant pipeline; The airflow temperature regulating device further includes a flow meter. After obtaining the target opening based on the opening adjustment amount and the opening before adjustment, the method further includes: Determine whether the target opening is equal to the threshold opening; If the target opening degree is equal to the threshold opening degree, then the speed of the driving water pump is increased. The flow rate signal of the circulating liquid in the circulating liquid loop is acquired by the flow meter; Determine whether the flow rate signal is greater than a preset threshold flow rate; If the flow rate signal is greater than the preset threshold flow rate, the speed of the driving water pump is reduced, and the number of times the flow rate signal is greater than the preset threshold flow rate is recorded. Determine whether the number of times is equal to the preset number of times; If the number of times is equal to the preset number of times, then the flow rate of the coolant is increased or the temperature of the coolant is decreased. The airflow temperature regulating device further includes a liquid temperature sensor, and the method further includes: The liquid temperature signal of the circulating liquid in the circulating liquid circuit is acquired by the liquid temperature sensor. Based on the liquid temperature signal and the preset liquid temperature, the opening of the flow regulating valve is adjusted until the real-time liquid temperature signal collected by the liquid temperature sensor is greater than or equal to the preset liquid temperature.

2. The method according to claim 1, characterized in that, The airflow temperature regulating device further includes: an inlet pipe and an outlet pipe connected to the circulating liquid circuit, a first solenoid valve disposed on the inlet pipe, a second solenoid valve disposed on the outlet pipe, a third solenoid valve disposed on the outlet pipe, and a pressure sensor. The circulating liquid circuit includes a first sub-pipeline and a second sub-pipeline. The third solenoid valve is disposed on the first sub-pipeline, and the pressure sensor and the drive water pump are disposed on the second sub-pipeline. Before acquiring the airflow temperature signal of the circulating airflow collected by the airflow temperature sensor, the method further includes: Control the first and second solenoid valves to open, and control the third solenoid valve to close; After the room temperature liquid is injected into the inlet pipe and continues for a first preset time, the second solenoid valve is closed. The pressure sensor acquires the liquid pressure signal in the second sub-pipeline. Determine whether the liquid pressure signal is equal to the preset pressure signal; If the liquid pressure signal is equal to the preset pressure signal, then the first solenoid valve is controlled to close, the third solenoid valve is controlled to open, and the drive water pump is controlled to start.

3. The method according to claim 2, characterized in that, The method further includes: Upon receiving a stop signal from the circulating fan, the flow regulating valve is closed, and the drive water pump is stopped. Control the first and second solenoid valves to open, and control the third solenoid valve to close; After injecting hot liquid into the inlet pipe for a second preset time, the first solenoid valve and the second solenoid valve are closed.

4. A temperature controller for circulating airflow, characterized in that, An airflow temperature regulating device is applied, comprising a circulating fluid circuit, a coolant pipeline, a first heat exchanger, a second heat exchanger, a flow regulating valve, a drive water pump, and an airflow temperature sensor. The drive water pump is installed in the circulating fluid circuit. The circulating fluid and circulating airflow in the circulating fluid circuit exchange heat with each other through the first heat exchanger, and the circulating fluid in the circulating fluid circuit and the coolant in the coolant pipeline exchange heat with each other through the second heat exchanger. The controller includes: The first acquisition module is used to acquire the airflow temperature signal of the circulating airflow collected by the airflow temperature sensor; The first processing module is used to obtain the opening adjustment amount of the flow regulating valve based on the airflow temperature signal and the preset airflow temperature and a PID control algorithm. The second processing module is used to obtain the target opening based on the opening adjustment amount and the opening before adjustment; An adjustment module is used to adjust the opening of the flow regulating valve according to the target opening degree, so as to control the flow rate of coolant in the coolant pipeline; The airflow temperature regulating device also includes a flow meter, and the controller also includes: The first judgment module is used to determine whether the target opening degree is equal to the threshold opening degree; The first control module is used to control and increase the speed of the drive water pump when the target opening degree is equal to the threshold opening degree; The second acquisition module is used to acquire the flow rate signal of the circulating liquid in the circulating liquid circuit collected by the flow meter; The second judgment module is used to determine whether the flow signal is greater than a preset threshold flow. The second control module is used to control the speed of the driving water pump to be reduced when the flow signal is greater than the preset threshold flow, and to record the number of times the flow signal is greater than the preset threshold flow. The third judgment module is used to determine whether the number of times is equal to the preset number of times; The third control module is used to control the flow rate of the coolant to increase or the temperature of the coolant to decrease when the number of times equals the preset number of times. The airflow temperature regulating device further includes a liquid temperature sensor, and the controller further includes: The third acquisition module is used to acquire the liquid temperature signal of the circulating liquid in the circulating liquid circuit collected by the liquid temperature sensor. The second adjustment module is used to adjust the opening of the flow regulating valve according to the liquid temperature signal and the preset liquid temperature, until the real-time liquid temperature signal collected by the liquid temperature sensor is greater than or equal to the preset liquid temperature.

5. The controller according to claim 4, characterized in that, The airflow temperature regulating device further includes: an inlet pipe and an outlet pipe connected to the circulating liquid circuit, a first solenoid valve disposed on the inlet pipe, a second solenoid valve disposed on the outlet pipe, a third solenoid valve disposed on the outlet pipe, and a pressure sensor. The circulating liquid circuit includes a first sub-pipeline and a second sub-pipeline. The third solenoid valve is disposed on the first sub-pipeline, and the pressure sensor and the drive water pump are disposed on the second sub-pipeline. The controller further includes: The fourth control module is used to control the opening of the first and second solenoid valves and to control the closing of the third solenoid valve; The fifth control module is used to control the injection of room temperature liquid into the inlet pipeline for a first preset time, and then control the second solenoid valve to close. The fourth acquisition module is used to acquire the liquid pressure signal in the second sub-pipe collected by the pressure sensor; The fourth judgment module is used to determine whether the liquid pressure signal is equal to the preset pressure signal; The sixth control module is used to control the first solenoid valve to close, the third solenoid valve to open, and the drive pump to start when the liquid pressure signal is equal to the preset pressure signal.

6. The controller according to claim 5, characterized in that, The controller also includes: The seventh control module is used to control the flow regulating valve to close and control the drive water pump to stop when a stop signal of the circulating fan is received; The eighth control module is used to control the opening of the first solenoid valve and the second solenoid valve, and to control the closing of the third solenoid valve; The ninth control module is used to control the injection of hot liquid into the inlet pipe and, after a second preset time, to control the first solenoid valve and the second solenoid valve to close.

7. A temperature control system for circulating airflow, characterized in that, Includes a circulating airflow temperature controller and an airflow temperature regulating device as described in any one of claims 4 to 6; wherein the airflow temperature regulating device includes a circulating liquid circuit, a coolant pipeline, a first heat exchanger, a second heat exchanger, a flow regulating valve, a drive water pump, and an airflow temperature sensor; wherein: The drive water pump is installed on the circulating liquid circuit, and the drive water pump is used to drive the flow of circulating liquid in the circulating liquid circuit. The flow regulating valve is installed on the coolant pipeline, and the flow regulating valve is used to regulate the flow rate of coolant in the coolant pipeline; The circulating liquid and circulating airflow in the circulating liquid circuit exchange heat through the first heat exchanger. The circulating fluid in the circulating fluid circuit and the coolant in the coolant pipeline flow through the second heat exchanger to exchange heat. The airflow temperature sensor is used to collect the airflow temperature signal of the circulating airflow; The airflow temperature regulating device also includes a flow meter; The flow meter is installed on the circulating liquid circuit and is used to collect the flow rate signal of the circulating liquid in the circulating liquid circuit; The airflow temperature regulating device also includes a liquid temperature sensor; The liquid temperature sensor is installed on the circulating liquid circuit and is used to collect the liquid temperature signal of the circulating liquid in the circulating liquid circuit.

8. The system according to claim 7, characterized in that, The circulating fluid circuit includes a first sub-pipeline and a second sub-pipeline. The airflow temperature regulating device further includes: an inlet pipe and an outlet pipe connected to the circulating fluid circuit, a first solenoid valve, a second solenoid valve, a third solenoid valve, and a pressure sensor. The first solenoid valve is installed on the inlet pipe; The second solenoid valve is installed on the outlet pipeline; The third solenoid valve is installed on the first sub-pipeline; The pressure sensor and the drive pump are installed on the second sub-pipeline.

9. The system according to any one of claims 7 and 8, characterized in that, The airflow temperature regulating device also includes: a pressure balancing tank and an exhaust valve; The pressure balancing tank and the exhaust valve are installed on the circulating fluid circuit; The pressure balancing tank is used to balance the pressure of the circulating fluid in the circulating fluid loop. The vent valve is used to release air bubbles in the circulating fluid within the circulating fluid circuit.

10. A coiling and splicing unit, characterized in that, include: The circulating airflow temperature control system, circulating fan, air distribution box, fluidized bed, cyclone dust collector, and air duct as described in any one of claims 7 to 9; The first heat exchanger in the airflow temperature regulating device of the circulating airflow temperature control system is located between the cyclone dust collector and the circulating fan. The air outlet of the circulating fan is connected to the air inlet of the air distribution box; The air outlet of the air distribution box is connected to the fluidized bed; The air inlet of the air duct is located above the fluidized bed; The air outlet of the air duct is connected to the air inlet of the cyclone dust collector; The outlet of the cyclone dust collector is connected to the inlet of the circulating fan.

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