CN112066659A - Circulating dehumidification control system and method for air-source heat pump dryer - Google Patents
Circulating dehumidification control system and method for air-source heat pump dryer Download PDFInfo
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- CN112066659A CN112066659A CN202010969435.2A CN202010969435A CN112066659A CN 112066659 A CN112066659 A CN 112066659A CN 202010969435 A CN202010969435 A CN 202010969435A CN 112066659 A CN112066659 A CN 112066659A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
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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
- F26B21/08—Humidity
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a circulating dehumidification control system and a control method of an air energy heat pump dryer, which comprises the following steps: the heat pump unit heats the drying room to reach a moisture removing condition; the intermittent dehumidification process is that the dehumidification fan and the fresh air valve are opened and closed based on the circulation of the temperature, the humidity and the time in the drying room; and (5) repeating the second step process until the drying is finished by changing the wind direction of the circulating fan. The invention can ensure effective dehumidification of the dried materials, prevent heat and time loss caused by ineffective or low-efficiency dehumidification under the condition of low temperature and low humidity, greatly improve the drying uniformity and timeliness through the conversion of wind directions, greatly improve the dehumidification efficiency compared with the traditional system which simply depends on the dehumidification of the dehumidification wind valve by the cooperation of the dehumidification fan and the fresh air valve, and simultaneously ensure the accuracy of temperature and humidity data and the dehumidification position in the drying process by adopting two groups of different temperature and humidity transmitters, the dehumidification fan and the fresh air valve aiming at the conversion of the wind directions.
Description
Technical Field
The invention relates to the technical field of drying, in particular to a circulating dehumidification control system and a control method of an air-source heat pump dryer.
Background
In the current drying field, the application of the air source heat pump dryer is more and more extensive, the trend of comprehensively replacing original coal and gas for drying is great, the government is vigorously popularized, and the effects of energy conservation and emission reduction are obvious.
The air source heat pump as a heat source is easily influenced by the external environment, and the heating quantity under different working conditions is greatly different. The traditional drying and dehumidifying system usually adopts a table lookup dehumidifying or temperature control dehumidifying method, the dehumidifying performance difference of the same set of dehumidifying parameters of the drying system under different working conditions is very large, the heating capacity can not follow the dehumidifying frequency under the working condition with lower environmental temperature, the low-efficiency dehumidifying with low temperature and low humidity is realized, and the drying efficiency is extremely low. Meanwhile, aiming at some large-scale drying equipment, the drying circulating air duct is long, the phenomenon that the circulating air outlet side is dry and the circulating air return side is dry at last often occurs in the long-time drying process, the problem that the position of the drying material is changed midway through drying is often solved, and the operation is complex, the time is wasted, and the labor is wasted.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a circulating dehumidification control system and a control method of an air energy heat pump dryer.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention provides a circulating humidity-discharging control system of an air-source heat pump dryer, which comprises a temperature and humidity transmitter, an electric control system, a heat pump unit, a circulating fan, a humidity-discharging fan and a fresh air valve, wherein the temperature and humidity transmitter is connected with the electric control system;
the temperature and humidity transmitter is used for acquiring temperature and humidity data in the drying room in real time;
the heat pump unit is used for providing heat energy for the drying room;
the circulating fan is arranged in the drying room, so that air in the room flows to take away heat of the heat pump heat exchanger, and the temperature of the room rises;
the moisture exhausting fan is arranged at the upper part of the drying room and is used for exhausting the damp and hot air in the drying room;
the fresh air valve is embedded in the drying room body and used for supplementing fresh air in the dehumidification process.
As a preferred scheme, the electric control system is used for displaying the state of the drying equipment to a user through the touch display screen;
the drying device is used for receiving and storing drying parameters input by a user from a display screen in real time;
the system is used for controlling the opening and closing of the heat pump unit, the circulating fan, the moisture exhaust fan and the fresh air valve by combining the analysis drying parameters and the collected real-time data.
As a preferred scheme, a plurality of stage drying parameters are stored in an electric control system, and each stage parameter comprises a stage duration time L, a stage target temperature parameter T, a stage target humidity parameter H, a dehumidifying operation time parameter Y, a dehumidifying stop time parameter X, a dehumidifying start temperature difference Q, a dehumidifying cooling temperature difference J, a dehumidifying cooling humidity difference S and an air channel direction parameter F;
the parameters L, X, Y are all positive real numbers and the units are all minutes;
the parameters T, Q, J are all positive and real numbers and are in degrees Celsius; h and S are percentages; the parameter F is two choices "positive"/"negative".
A circulating dehumidification control method of an air-source heat pump dryer comprises the following steps:
s1: conveying the materials to be dried into a drying room, closing a door of the drying room, inputting values of parameters T, H, Y, X, Q, J and S of each stage according to a drying process user, and starting drying operation;
s2: in the drying process, the heat pump unit is started, and along with the rise of the temperature in the drying room, the evaporation of the moisture of the material is accelerated to cause the rise of the humidity in the drying room; when the temperature in the room reaches the target temperature T at the current stage and the humidity in the room is more than or equal to the target humidity H at the stage, starting dehumidification under the dehumidification condition, controlling a fresh air valve and a dehumidification fan to be opened, and entering step S3;
s3: discontinuously dehumidifying, wherein a dehumidifying fan and a fresh air valve are opened and closed circularly based on the temperature, the humidity and the time in the drying room, the circulating opening and closing of the dehumidifying fan and the fresh air valve are continued until the duration L of the current stage, the calling of parameters of the current stage is finished, and the step S4 is entered;
s4: calling the parameters of the next stage, comparing the values of the parameters F, and directly repeating the step S3 if the values of the parameters F are the same as those of the previous stage; if the difference is not the same, the electronic control system controls the circulating fan to change the direction and then repeats the content of the step S3, and the operation is continued until all the stage parameters are called, and the drying is finished.
As a preferable scheme, when the dehumidification process is started in the steps S2 and S3, the fresh air valve is firstly opened, and the dehumidification fan is started after the fresh air valve is completely opened for a moment in a delayed time; and when the moisture removal process is finished, the fresh air valve and the moisture removal fan are closed simultaneously.
As a preferable mode, the starting and ending of the dehumidifying process in step S3 includes:
1) when the temperature in the drying room is more than or equal to the stage target temperature value T-the moisture-removing starting temperature difference Q;
2) the humidity in the drying room is more than or equal to the stage target humidity value H;
3) when the last dehumidification ending time is not less than the dehumidification stopping time X and the three points are reached simultaneously, the dehumidification process starts;
further comprising:
1) the temperature in the drying room is less than the stage target temperature value T, the moisture removal starting temperature difference Q and the moisture removal cooling temperature difference J;
2) the humidity in the drying room is less than the stage target humidity H-the humidity difference S of dehumidification and dehumidification;
3) the last dehumidifying duration is more than or equal to the dehumidifying running time Y, and when any point of the three points is reached, the dehumidifying process is finished.
As a preferable scheme, the reversing process of the circulating fan in the step S4 is as follows:
the heat pump unit is shut down, the circulating fan is reversed, the circulating fan is started, and the heat pump unit is started.
One or more technical schemes provided by the invention at least have the following technical effects or advantages:
1. according to the invention, the temperature, the humidity and the time in the drying room are integrated together to serve as the starting and closing conditions of the dehumidification process, the dehumidification process is accurately controlled, the low-efficiency dehumidification is avoided, the unnecessary heat loss is greatly reduced, and the drying time is shortened.
2. The drying air duct can be repeatedly changed, and the drying uniformity and effectiveness are greatly improved particularly for large-scale drying equipment with a long air duct.
3. According to the invention, the air valve and the fan are matched for moisture removal, so that the moisture removal efficiency is greatly improved, and the humidity in the drying room is rapidly reduced in a short time.
4. Aiming at the change of air channels in the drying process, the invention adopts two groups of independent temperature and humidity controllers, moisture removal fans and fresh air valves, and different air channels call different groups. The data collected by the electric control system are ensured to truly reflect the current drying process, and the fresh air valve and the dehumidifying fan are opened at proper positions in the drying air duct.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
fig. 1 is a schematic diagram of a circulation dehumidification control system of an air-source heat pump dryer in an embodiment of the invention.
Fig. 2 is a flowchart of a method for controlling the circulation moisture removal of an air-source heat pump dryer according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly 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 be indirectly connected to the other element.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
For better understanding of the above technical solutions, the following detailed descriptions will be provided in conjunction with the drawings and the detailed description of the present invention.
Example (b):
referring to fig. 1-2, the present embodiment provides a circulating humidity-discharging control system of an air-source heat pump dryer, including a temperature and humidity transmitter, an electric control system, a heat pump unit, a circulating fan, a humidity-discharging fan and a fresh air valve; the temperature and humidity transmitter is used for acquiring temperature and humidity data in the drying room in real time; the heat pump unit is used for providing heat energy for the drying room; the circulating fan is arranged in the drying room, so that air in the room flows to take away heat of the heat pump heat exchanger, and the temperature of the room rises; the moisture exhausting fan is arranged at the upper part of the drying room and is used for exhausting the damp and hot air in the drying room; the fresh air valve is embedded in the drying room body and used for supplementing fresh air in the dehumidification process.
The electric control system comprises the following aspects: firstly, displaying the state of the drying equipment to a user through a touch display screen; secondly, receiving and storing drying parameters input by a user from a display screen in real time; and thirdly, opening and closing of the heat pump unit, the circulating fan, the moisture exhausting fan and the fresh air valve are controlled by combining the analyzed drying parameters and the collected real-time data.
A plurality of stage drying parameters are stored in the electric control system, and each stage parameter comprises stage duration L, a stage target temperature parameter T, a stage target humidity parameter H, a dehumidifying operation time parameter Y, a dehumidifying stop time parameter X, a dehumidifying start temperature difference Q, a dehumidifying cooling temperature difference J, a dehumidifying and dehumidifying difference S and an air duct direction parameter F; the parameters L, X, Y are all positive real numbers and the units are all minutes; the parameters T, Q, J are all positive and real numbers and are in degrees Celsius; h and S are percentages; the parameter F is two choices "positive"/"negative".
The working principle of the invention is as follows:
referring to fig. 1 and 2, a method for controlling the circulation dehumidification of an air-source heat pump dryer specifically includes the steps of conveying materials to be dried into a drying room, closing a door of the drying room, inputting values of parameters T, H, Y, X, Q, J and S of each stage according to a user of a drying process, and starting drying operation.
In the drying process, the air source heat pump is started, and the temperature rise stage is included. With the rise of the temperature in the drying room, the evaporation of the moisture of the material is accelerated to cause the rise of the humidity in the drying room. The temperature and humidity transmitter monitors the air temperature and humidity data in the room in real time, when the temperature in the room reaches the current stage target temperature T and the humidity in the room is larger than or equal to the stage target humidity H, the humidity discharging condition is achieved, the humidity discharging is started, the fresh air valve and the humidity discharging fan are controlled to be opened, and the intermittent humidity discharging stage is started.
And in the discontinuous dehumidification stage, namely, the dehumidification fan and the fresh air valve are opened and closed based on the circulation of the temperature, the humidity and the time in the drying room.
The specific dehumidification process follows the following rules: when the temperature in the drying room is more than or equal to a stage target temperature value T-a moisture-removing starting temperature difference Q; secondly, the humidity in the drying room is larger than or equal to the stage target humidity value H; and thirdly, when the time from the last dehumidification ending is more than or equal to the dehumidification stopping time X, the fresh air valve is opened, the dehumidification fan is started after a period of time delay, and the dehumidification process starts. When the temperature in the drying room is lower than the stage target temperature value T, the dehumidification starting temperature difference Q and the dehumidification cooling temperature difference J; II, humidity in the drying room is less than stage target humidity H-humidity difference S of dehumidification and dehumidification; III, when the current humidity discharging duration is longer than or equal to the humidity discharging running time Y and any point I, II or III is reached, the humidity discharging fan and the fresh air valve are closed, and the humidity discharging process is finished. The temperature and humidity transmitter, the moisture exhaust fan and the fresh air valve which are used for collecting temperature and humidity parameters at the stage are organized into a group, namely the first temperature and humidity transmitter, the first moisture exhaust fan and the first fresh air valve.
And (4) the circulation opening and closing of the moisture exhausting fan and the fresh air valve are continued until the duration time L of the current stage, the calling of the parameters of the current stage is finished, and the air duct reversing stage is started.
The air duct is reversed, the parameters of the next stage are called first, the values of the parameters F are compared, and if the values of the parameters F are the same as those of the last stage, the intermittent moisture removal content of the last stage is directly repeated; if the temperature and humidity of the air source heat pump and the humidity of the air source heat pump are different, the electric control system controls the air source heat pump to stop, then the circulating fan stops, the circulating fan is started in a reversing mode after a period of time delay, the air source heat pump unit is started, and at the moment, the temperature and humidity transmitter, the humidity exhaust fan and the fresh air valve are changed into another group, namely a temperature and humidity transmitter II, a humidity exhaust fan II and a fresh; and then, continuously carrying out discontinuous moisture removal content, and changing the currently called group of the temperature and humidity transmitter, the moisture removal fan and the fresh air valve every time the circulating fan is reversed.
And the operation of the stages is continued until all the stage parameters are called, and the drying is finished.
According to the circulating dehumidification control method of the air source heat pump dryer, the dehumidification process in the drying process is accurately controlled by comprehensively considering the temperature, the humidity and the time, so that the dried materials are effectively dehumidified, the loss of heat and time caused by ineffective or low-efficiency dehumidification under the condition of low temperature and low humidity can be prevented, the drying uniformity and timeliness can be greatly improved through the conversion of wind directions, the dehumidification efficiency is greatly improved by the cooperation of the dehumidification fan and the fresh air valve compared with the traditional system which simply depends on the dehumidification of the dehumidification air valve, and the accuracy of temperature and humidity data and the dehumidification position in the drying process is ensured by adopting two different groups of temperature and humidity transmitters, the dehumidification fan and the fresh air valve aiming at the conversion of the wind directions.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a circulation hydrofuge control system of air energy heat pump drying-machine which characterized in that: the system comprises a temperature and humidity transmitter, an electric control system, a heat pump unit, a circulating fan, a moisture exhaust fan and a fresh air valve;
the temperature and humidity transmitter is used for acquiring temperature and humidity data in the drying room in real time;
the heat pump unit is used for providing heat energy for the drying room;
the circulating fan is arranged in the drying room, so that air in the room flows to take away heat of the heat pump heat exchanger, and the temperature of the room rises;
the moisture exhausting fan is arranged at the upper part of the drying room and is used for exhausting the damp and hot air in the drying room;
the fresh air valve is embedded in the drying room body and used for supplementing fresh air in the dehumidification process.
2. The system of claim 2, wherein: the electric control system is used for displaying the state of the drying equipment to a user through the touch display screen;
the drying device is used for receiving and storing drying parameters input by a user from a display screen in real time;
the system is used for controlling the opening and closing of the heat pump unit, the circulating fan, the moisture exhaust fan and the fresh air valve by combining the analysis drying parameters and the collected real-time data.
3. The system of claim 2, wherein: a plurality of stage drying parameters are stored in the electric control system, and each stage parameter comprises stage duration L, a stage target temperature parameter T, a stage target humidity parameter H, a dehumidifying operation time parameter Y, a dehumidifying stop time parameter X, a dehumidifying start temperature difference Q, a dehumidifying cooling temperature difference J, a dehumidifying and dehumidifying difference S and an air duct direction parameter F;
the parameters L, X, Y are all positive real numbers and the units are all minutes;
the parameters T, Q, J are all positive and real numbers and are in degrees Celsius; h and S are percentages; the parameter F is two choices "positive"/"negative".
4. A circulating dehumidification control method of an air-source heat pump dryer is characterized by comprising the following steps: the method comprises the following steps:
s1: conveying the materials to be dried into a drying room, closing a door of the drying room, inputting values of parameters T, H, Y, X, Q, J and S of each stage according to a drying process user, and starting drying operation;
s2: in the drying process, the heat pump unit is started, and along with the rise of the temperature in the drying room, the evaporation of the moisture of the material is accelerated to cause the rise of the humidity in the drying room; when the temperature in the room reaches the target temperature T at the current stage and the humidity in the room is more than or equal to the target humidity H at the stage, starting dehumidification under the dehumidification condition, controlling a fresh air valve and a dehumidification fan to be opened, and entering step S3;
s3: discontinuously dehumidifying, wherein a dehumidifying fan and a fresh air valve are opened and closed circularly based on the temperature, the humidity and the time in the drying room, the circulating opening and closing of the dehumidifying fan and the fresh air valve are continued until the duration L of the current stage, the calling of parameters of the current stage is finished, and the step S4 is entered;
s4: calling the parameters of the next stage, comparing the values of the parameters F, and directly repeating the step S3 if the values of the parameters F are the same as those of the previous stage; if the difference is not the same, the electronic control system controls the circulating fan to change the direction and then repeats the content of the step S3, and the operation is continued until all the stage parameters are called, and the drying is finished.
5. The circulation dehumidifying control method of an air-source heat pump dryer according to claim 4, wherein: when the dehumidification process is started in the steps S2 and S3, the fresh air valve is firstly opened, and the dehumidification fan is started after the fresh air valve is completely opened for a while; and when the moisture removal process is finished, the fresh air valve and the moisture removal fan are closed simultaneously.
6. The circulation dehumidifying control method of an air-source heat pump dryer according to claim 5, wherein: the start and end of the dehumidifying process in step S3 includes:
1) when the temperature in the drying room is more than or equal to the stage target temperature value T-the moisture-removing starting temperature difference Q;
2) the humidity in the drying room is more than or equal to the stage target humidity value H;
3) when the last dehumidification ending time is not less than the dehumidification stopping time X and the three points are reached simultaneously, the dehumidification process starts;
further comprising:
1) the temperature in the drying room is less than the stage target temperature value T, the moisture removal starting temperature difference Q and the moisture removal cooling temperature difference J;
2) the humidity in the drying room is less than the stage target humidity H-the humidity difference S of dehumidification and dehumidification;
3) the last dehumidifying duration is more than or equal to the dehumidifying running time Y, and when any point of the three points is reached, the dehumidifying process is finished.
7. The circulation dehumidifying control method of an air-source heat pump dryer according to claim 6, wherein: the reversing process of the circulating fan in the step S4 is as follows:
the heat pump unit is shut down, the circulating fan is reversed, the circulating fan is started, and the heat pump unit is started.
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| CN112815655A (en) * | 2021-01-04 | 2021-05-18 | 上海威士机械有限公司 | Control method of through type dryer |
| CN113137853A (en) * | 2021-04-26 | 2021-07-20 | 四川蜀冷冷暖设备有限公司 | Intelligent control method suitable for dryer |
| CN113899188A (en) * | 2021-11-11 | 2022-01-07 | 广东海悟科技有限公司 | Drying production line and control method thereof |
| CN113945087A (en) * | 2021-10-15 | 2022-01-18 | 青岛海尔空调电子有限公司 | Method and device for dehumidification, electronic equipment and storage medium |
| CN114468325A (en) * | 2021-12-30 | 2022-05-13 | 霍山县天下泽雨生物科技发展有限公司 | Drying and sterilizing device for processing Huoshan ganoderma lucidum and drying method thereof |
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| CN113137853A (en) * | 2021-04-26 | 2021-07-20 | 四川蜀冷冷暖设备有限公司 | Intelligent control method suitable for dryer |
| CN113137853B (en) * | 2021-04-26 | 2022-10-21 | 四川蜀冷冷暖设备有限公司 | Intelligent control method suitable for dryer |
| CN113945087A (en) * | 2021-10-15 | 2022-01-18 | 青岛海尔空调电子有限公司 | Method and device for dehumidification, electronic equipment and storage medium |
| CN113899188A (en) * | 2021-11-11 | 2022-01-07 | 广东海悟科技有限公司 | Drying production line and control method thereof |
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Application publication date: 20201211 |