CN113418381B - Control method of energy-saving management dehumidification dryer - Google Patents
Control method of energy-saving management dehumidification dryer Download PDFInfo
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- CN113418381B CN113418381B CN202110689534.XA CN202110689534A CN113418381B CN 113418381 B CN113418381 B CN 113418381B CN 202110689534 A CN202110689534 A CN 202110689534A CN 113418381 B CN113418381 B CN 113418381B
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- air inlet
- air outlet
- dryer
- controlling
- variable frequency
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
Abstract
The invention relates to a control method of an energy-saving management dehumidification dryer, which comprises the following steps: after the energy-saving management dehumidification dryer is started, controlling a variable frequency fan in the dehumidifier to operate at a high rotating speed; detecting the temperature of the air inlet and comparing the detected temperature with a set drying temperature, and controlling the drying and heating output to heat the circulating gas; after the variable frequency fan of the dehumidifier is controlled to operate at a high rotating speed for a preset time, detecting the temperature of an air inlet and an air outlet of the dryer to obtain the temperature difference between the air inlet and the air outlet; and circularly judging whether the temperature difference value of the air inlet and the air outlet is in a preset temperature range, and controlling the frequency of the variable frequency fan according to the judgment result to adjust the flow of the circulating gas. The invention can control the rotating speed of the variable frequency fan to adjust the flow of the circulating gas by comparing the temperature difference of the air inlet and the air outlet of the dryer with the preset temperature interval, thereby realizing the purposes of saving electricity and water.
Description
Technical Field
The invention relates to the technical field of dehumidification dryers, in particular to a control method of an energy-saving management dehumidification dryer.
Background
At present, the conveying of the circulating gas is mainly carried out by a fixed-frequency fan, but the fixed-frequency conveying fan has the following big defects in use: no matter how much the actual use capacity of the raw materials is and how much the drying degree of the raw materials is, the circulating air in the machine is always in a fixed high flow rate, the larger the circulating air quantity is, the more the power consumption of heating output is, and the larger the circulating air quantity is, the larger the cooling power of a cooler which is arranged in the dehumidifier for ensuring the service life of a circulating fan and used for exchanging heat with circulating return air and cooling needs to be, the more the cooling water is connected, and therefore the serious waste of electric energy and water is caused.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a control method of an energy-saving management dehumidification dryer, which can control the rotating speed of a variable frequency fan to adjust the flow of circulating gas by comparing the temperature difference of an air inlet and an air outlet of the dryer with a preset temperature interval, thereby achieving the purposes of saving electricity and water.
The technical scheme adopted by the invention for solving the technical problems is as follows: the control method of the energy-saving management dehumidification dryer is provided, the dehumidification dryer comprises a dehumidifier, a dryer and a heating barrel, wherein the dehumidifier is provided with a variable frequency fan, detection modules are arranged at an air inlet and an air outlet of the dryer, an air inlet connecting pipe is connected to an air outlet of the dehumidifier, one end of the air inlet connecting pipe is connected with the heating barrel, the heating barrel is connected with an inlet end of the dryer, an air inlet of the dehumidifier is connected with an air outlet connecting pipe, and one end of the air outlet connecting pipe is connected with an outlet end of the dryer;
the control method comprises the following steps:
after the energy-saving management dehumidification dryer is started, controlling a variable frequency fan in the dehumidifier to operate at a high rotating speed;
detecting the temperature of the air inlet and comparing the detected temperature with a set drying temperature, and controlling the drying and heating output to heat the circulating gas;
After controlling the frequency conversion fan of the dehumidifier to operate at a high rotating speed for a preset cycle judgment period (namely preset time), detecting the temperature of an air inlet and an air outlet of the dryer to obtain the temperature difference between the air inlet and the air outlet;
and circularly judging whether the temperature difference value of the air inlet and the air outlet is in a preset temperature range or not, and controlling the frequency of the variable frequency fan according to the judgment result to adjust the flow of the circulating gas.
As a supplement to the technical scheme of the invention, the variable frequency fan in the dehumidifier runs at a high rotating speed after being started, and the running frequency of the variable frequency fan is controlled to be 60Hz at the high rotating speed.
As a supplement to the technical solution of the present invention, the cycle of the cyclic judgment is less than or equal to 300 seconds.
As a supplement to the technical solution of the present invention, controlling the rotation speed of the variable frequency fan to adjust the flow rate of the circulating gas according to the determination result specifically includes:
when the temperature difference value of the air inlet and the air outlet is greater than or equal to the upper limit of the preset temperature interval, controlling the high-rotating-speed output frequency of the variable-frequency fan to be unchanged;
when the temperature difference value of the air inlet and the air outlet is smaller than the lower limit of the preset temperature interval, controlling the variable frequency fan to operate at a low rotating speed, and controlling the operating frequency of the variable frequency fan to be 35Hz when the rotating speed is low;
When the temperature difference value of the air inlet and the air outlet is smaller than the upper limit of the preset temperature interval and is larger than or equal to the lower limit of the preset temperature interval, and the temperature difference value of the air inlet and the air outlet is smaller than the temperature difference value of the previous time, controlling the frequency of the variable frequency fan to be reduced;
and when the temperature difference value of the air inlet and the air outlet is smaller than the upper limit of the preset temperature interval and is larger than or equal to the lower limit of the preset temperature interval, and the temperature difference value of the air inlet and the air outlet is larger than the temperature difference value of the previous time, controlling the frequency of the variable frequency fan to rise.
As a supplement to the technical scheme of the invention, the lower limit of the preset temperature interval is 15 ℃ +/-a, the upper limit of the preset temperature interval is 25 ℃ +/-a, wherein a is an environmental correction coefficient, and a is more than or equal to 0 ℃ and less than or equal to 5 ℃.
Has the advantages that: the invention relates to a control method of an energy-saving management dehumidification dryer, which can control the rotating speed of a variable frequency fan to adjust the flow of circulating gas by comparing the temperature difference of an air inlet and an air outlet of the dryer with a preset temperature interval, and reduce the flow of the circulating gas when the raw material is less in capacity or basically dried, thereby reducing the power consumption of heating output and the output power of the fan, reducing the consumption of cooling water of the dehumidifier and realizing the purposes of saving electricity and water.
Drawings
FIG. 1 is a diagram of the steps of the present invention;
FIG. 2 is a flow chart of the present invention;
fig. 3 is a schematic structural view of the dehumidifying dryer according to the present invention.
The figure is as follows: 1. dehumidifier, 2, desiccator, 3, air inlet connecting pipe, 4, heating bucket, 5, detection module, 6, air-out connecting pipe.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Embodiments of the present invention relate to a control method of an energy-saving management dehumidifying dryer, as shown in fig. 1 to 3, the dehumidifying dryer comprises a dehumidifier 1 provided with a variable frequency fan, a dryer 2 and a heating barrel 4, the air inlet and the air outlet of the dryer 2 are both provided with a detection module 5, the detection module 5 is used for detecting the temperature of the air inlet and the air outlet of the dryer 2, the detection module 5 generally adopts a temperature sensor, the air outlet of the dehumidifier 1 is connected with an air inlet connecting pipe 3, one end of the air inlet connecting pipe 3 is connected with a heating barrel 4, the heating barrel 4 is connected with the inlet end of the dryer 2, the air inlet of the dehumidifier 1 is connected with an air outlet connecting pipe 6, one end of the air outlet connecting pipe 6 is connected with the outlet end of the dryer 2, the dehumidifier 1 is a variable frequency dehumidifier, and a variable frequency fan is arranged inside the dehumidifier;
The control method comprises the following steps:
after the energy-saving management dehumidification dryer is started, controlling a variable frequency fan in the dehumidifier 1 to run at a high rotating speed;
detecting the temperature of the air inlet and comparing the detected temperature with a set drying temperature, and controlling the drying and heating output to heat the circulating gas;
after controlling the variable frequency fan of the dehumidifier 1 to operate at a high rotating speed for a preset cycle judgment period (namely preset time), detecting the temperature of the air inlet and the air outlet of the dryer 2 to obtain the temperature difference between the air inlet and the air outlet;
and circularly judging whether the temperature difference value of the air inlet and the air outlet is in a preset temperature range or not, and controlling the frequency of the variable frequency fan according to the judgment result to adjust the flow of the circulating gas. Therefore, when the raw materials used in production have low capacity or the raw materials are basically dry, the frequency of the circulating variable frequency fan is controlled and reduced to reduce the flow of the circulating gas, so that the power consumption of heating output and the output power of the fan are reduced, the consumption of cooling water of the dehumidifier 1 is reduced, and the purposes of saving electricity and water are achieved.
The variable frequency fan in the dehumidifier 1 runs at a high rotating speed after being started, and the running frequency of the variable frequency fan is controlled to be 60Hz when the rotating speed is high, so that the circulating gas flow higher than that of the fan (50Hz) under the same standard working condition is obtained to dry the raw materials in the dryer 2, and the drying effect is obvious.
The cycle of the cyclic judgment is less than or equal to 300 seconds.
Controlling the rotating speed of the variable frequency fan to adjust the flow of the circulating gas according to the judgment result, and specifically comprising the following steps of:
when the temperature difference value of the air inlet and the air outlet is greater than or equal to the upper limit of the preset temperature interval, controlling the high-rotating-speed output frequency of the variable-frequency fan to be unchanged;
when the temperature difference value of the air inlet and the air outlet is smaller than the lower limit of the preset temperature interval, controlling the variable frequency fan to operate at a low rotating speed, and controlling the operating frequency of the variable frequency fan to be 35Hz when the rotating speed is low;
when the temperature difference value of the air inlet and the air outlet is smaller than the upper limit of the preset temperature interval and is larger than or equal to the lower limit of the preset temperature interval, and the temperature difference value of the air inlet and the air outlet is smaller than the temperature difference value of the previous time, controlling the frequency of the variable frequency fan to be reduced;
and when the temperature difference value of the air inlet and the air outlet is smaller than the upper limit of the preset temperature interval and is larger than or equal to the lower limit of the preset temperature interval, and the temperature difference value of the air inlet and the air outlet is larger than the temperature difference value of the previous time, controlling the frequency of the variable frequency fan to rise.
The lower limit of the preset temperature interval is 15 +/-a, the upper limit of the preset temperature interval is 25 +/-a, wherein a is an environment correction coefficient, and a is more than or equal to 0 ℃ and less than or equal to 5 ℃.
The temperature of the air inlet and the air outlet of the dryer 2 can be detected by the detection module 5, and the rotating speed of the variable frequency fan can be controlled by monitoring the temperature difference between the temperature of the air inlet and the temperature of the air outlet, so that the output gas capacity can be adjusted, and when the gas capacity conveyed by the fan is reduced, the output power of the fan can be correspondingly reduced. When the volume of the internal circulating gas is reduced, the heating barrel 4 only needs to continuously dry the gas with small volume to reach the set temperature, so that the heating output power is reduced, and the requirements of saving the output power of the fan and drying and heating functions are met; and the smaller the flow of the circulating gas is, the lower the cooling power of a cooler which is arranged in the dehumidifier and used for exchanging heat and cooling the circulating gas for ensuring the service life of the circulating fan can be reduced, and the smaller the flow of the cooling water which is connected in the dehumidifier can be, thereby achieving the purposes of saving energy and water.
Claims (4)
1. A control method of an energy-saving management dehumidification dryer is characterized in that: the dehumidifying dryer comprises a dehumidifier (1) provided with a variable frequency fan, a dryer (2) and a heating barrel (4), wherein detection modules (5) are arranged at an air inlet and an air outlet of the dryer (2), an air inlet connecting pipe (3) is connected with an air outlet of the dehumidifier (1), one end of the air inlet connecting pipe (3) is connected with the heating barrel (4), the heating barrel (4) is connected with an inlet end of the dryer (2), an air inlet of the dehumidifier (1) is connected with an air outlet connecting pipe (6), and one end of the air outlet connecting pipe (6) is connected with an outlet end of the dryer (2);
The control method comprises the following steps:
after the energy-saving management dehumidification dryer is started, controlling a variable frequency fan in the dehumidifier (1) to operate at a high rotating speed;
detecting the temperature of an air inlet and comparing the temperature with a set drying temperature, and controlling the drying and heating output to heat the circulating gas;
after controlling a variable frequency fan of the dehumidifier (1) to operate at a high rotating speed for a preset cycle judgment period, detecting the temperature of an air inlet and an air outlet of the dryer (2) to obtain the temperature difference between the air inlet and the air outlet;
circularly judging whether the temperature difference value of the air inlet and the air outlet is in a preset temperature range or not, and controlling the frequency of the variable frequency fan according to the judgment result to adjust the flow of the circulating gas;
controlling the rotating speed of the variable frequency fan to adjust the flow of the circulating gas according to the judgment result, and specifically comprising the following steps of:
when the temperature difference value of the air inlet and the air outlet is greater than or equal to the upper limit of the preset temperature interval, controlling the high-rotating-speed output frequency of the variable-frequency fan to be unchanged;
when the temperature difference value of the air inlet and the air outlet is smaller than the lower limit of the preset temperature interval, controlling the variable frequency fan to operate at a low rotating speed, and controlling the operating frequency of the variable frequency fan to be 35Hz when the rotating speed is low;
when the temperature difference value of the air inlet and the air outlet is smaller than the upper limit of the preset temperature interval and is larger than or equal to the lower limit of the preset temperature interval, and the temperature difference value of the air inlet and the air outlet is smaller than the temperature difference value of the previous time, controlling the frequency of the variable frequency fan to be reduced;
And when the temperature difference value of the air inlet and the air outlet is smaller than the upper limit of the preset temperature interval and is larger than or equal to the lower limit of the preset temperature interval, and the temperature difference value of the air inlet and the air outlet is larger than the temperature difference value of the previous time, controlling the frequency of the variable frequency fan to rise.
2. The control method of an energy-saving management dehumidification dryer according to claim 1, wherein: the frequency conversion fan in the dehumidifier (1) runs at a high rotating speed after being started, and the running frequency of the frequency conversion fan at the high rotating speed is controlled to be 60 Hz.
3. The control method of an energy-saving management dehumidification dryer according to claim 1, wherein: the cycle of the cyclic judgment is less than or equal to 300 seconds.
4. The control method of an energy-saving management dehumidification dryer according to claim 1, wherein: the lower limit of the preset temperature interval is 15 +/-a, the upper limit of the preset temperature interval is 25 +/-a, wherein a is an environment correction coefficient, and a is more than or equal to 0 ℃ and less than or equal to 5 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110689534.XA CN113418381B (en) | 2021-06-22 | 2021-06-22 | Control method of energy-saving management dehumidification dryer |
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| CN202110689534.XA CN113418381B (en) | 2021-06-22 | 2021-06-22 | Control method of energy-saving management dehumidification dryer |
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| CN113418381A CN113418381A (en) | 2021-09-21 |
| CN113418381B true CN113418381B (en) | 2022-07-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29723003U1 (en) * | 1997-12-31 | 1998-05-20 | Muehlboeck Kurt | Device for drying stacked lumber |
| JP5211056B2 (en) * | 2007-08-03 | 2013-06-12 | 株式会社松井製作所 | Dehumidifying and drying method for granular material, and dehumidifying and drying system for granular material |
| CN208205724U (en) * | 2018-05-23 | 2018-12-07 | 砚山县砚宏页岩砖厂 | Drying unit is used in brick processing |
| CN109269293A (en) * | 2018-09-17 | 2019-01-25 | 芜湖海成科技有限公司 | A kind of electrolytic metal band wind cold drying device |
| CN210718528U (en) * | 2019-07-02 | 2020-06-09 | 广东圆融新材料有限公司 | Hot air drying system for PP production of automobile |
| CN111365977B (en) * | 2020-03-23 | 2021-07-06 | 顺德职业技术学院 | Control method of closed type variable frequency heat pump drying equipment |
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