阅读说明：本技术 一种节能管理除湿干燥机的控制方法 (Control method of energy-saving management dehumidification dryer ) 是由 徐小军 吕威 刘自强 陈俊俊 于 2021-06-22 设计创作，主要内容包括：本发明涉及一种节能管理除湿干燥机的控制方法,所述的控制方法包括以下步骤：在所述节能管理除湿干燥机开机后,控制所述除湿机内的变频风机以高转速运行；检测进风口温度与设定干燥温度对比,控制干燥加热输出对循环气体进行加热；控制所述的除湿机的变频风机高转速运行预设时间后,检测干燥机进出风口的温度获取二者的温差；循环判断进出风口温差值是否处于预设的温度区间,并根据判断结果来控制变频风机频率以调节循环气体流量。本发明能够通过干燥机进出风口的温度差与预设的温度区间比较,控制变频风机转速调节循环气体流量,实现节电节水的目的。(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.)

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 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 run for a preset cycle judgment period at a high rotating speed, 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, and controlling the frequency of the variable frequency fan according to the judgment result to adjust the flow of the circulating gas.

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: 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.

5. The control method of an energy-saving management dehumidification dryer according to claim 4, 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 ℃.

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 variable frequency fan of the dehumidifier to run for a preset cycle judgment period (namely preset time) at a high rotating speed, 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.

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, 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, the smaller the flow of the cooling water which is connected in can be, and the purposes of saving energy and water can be achieved.