CN114322532A - Automatic drying control process of gas dryer - Google Patents
Automatic drying control process of gas dryer Download PDFInfo
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- CN114322532A CN114322532A CN202210058060.3A CN202210058060A CN114322532A CN 114322532 A CN114322532 A CN 114322532A CN 202210058060 A CN202210058060 A CN 202210058060A CN 114322532 A CN114322532 A CN 114322532A
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- 238000001035 drying Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 238000007664 blowing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The invention discloses an automatic drying control process of a gas dryer, which comprises the following steps: (1) feeding into a dryer: loading linen to be dried into a dryer; (2) drying by a dryer: starting a drying program, starting a burner, starting a PID automatic temperature control program when the conditions are met, and automatically adjusting the temperature of inlet air and outlet air of the dryer; (3) cooling the dryer: after drying is finished, opening the loading door for natural cooling, and finishing cooling after conditions are met; (4) discharging of the dryer: unloading and outputting the dried and cooled linen; (5) removing velvet by a dryer: and after the discharging and unloading are finished, starting a lint removing program, and removing the lint inside the dryer. According to the automatic drying control process for the gas dryer, PID automatic control is performed in the drying stage, and control is performed by combining air outlet and air inlet respectively, so that the temperature stability in the drying process is ensured, the drying efficiency is improved, and meanwhile, the linen is prevented from being damaged.
Description
Technical Field
The invention belongs to a drying control process, and particularly relates to a temperature control process method for an automatic drying process of a gas dryer.
Background
The dryer is a device for drying towel linen and scattering non-towel linen in a laundry factory, and is mainly divided into a gas dryer and a steam dryer.
The dryer is also a device with larger energy consumption in a laundry factory. The steam dryer is a device for drying linen by heating air through the heat of steam. The gas dryer is a device which burns gas in the air and then dries the linen by the temperature. Because the gas drying-machine produces the calorific value through the combustor burning, uncontrollable factor is also more simultaneously to it is difficult to lead to gas drying-machine temperature control in the drying process.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to solve the defects in the prior art and provides an automatic drying control process of a gas dryer.
The technical scheme is as follows: the invention relates to an automatic drying control process of a gas dryer, which comprises the following steps:
(1) feeding into a dryer: loading linen to be dried into a dryer;
(2) drying by a dryer: starting a drying program, starting a burner, starting a PID automatic temperature control program when the conditions are met, and automatically adjusting the temperature of inlet air and outlet air of the dryer;
(3) cooling the dryer: after drying is finished, opening the loading door for natural cooling, and finishing cooling after conditions are met;
(4) discharging of the dryer: unloading and outputting the dried and cooled linen;
(5) removing velvet by a dryer: and after the discharging and unloading are finished, starting a lint removing program, and removing the lint inside the dryer.
Further, the step (1) comprises the following steps: the fan is started, the loading door is automatically opened, the unloading door is automatically closed, and the inner cylinder of the dryer rotates forwards and backwards.
Further, the step (2) comprises the following steps: the rotation frequency of the fan is increased, the loading door is closed, the unloading door is closed, the inner cylinder of the dryer rotates forwards, the burner is started, and the return air door is opened.
Further, the starting program of the burner in the step (2) specifically includes:
(a) when the combustor is just started, the opening rate of the combustor is 100 percent;
(b) when the temperature of the air inlet reaches 160-170 ℃, the opening rate of the burner is reduced to 80 percent;
(c) when the temperature of the air inlet reaches 180 ℃ and 190 ℃, the opening rate of the burner is reduced to 60 percent;
(d) when the temperature of the air inlet reaches 190-;
(e) when the temperature of the air outlet reaches 100-110 ℃, the PID control of the air outlet temperature is started.
Further, the air inlet temperature PID control in the step (d) is to control the opening rate of the burner to stabilize the air inlet temperature until the air outlet temperature reaches a preset value to start the air outlet temperature PID control.
Further, the PID control of the air outlet temperature in the step (e) is to stabilize the temperature of the air outlet by controlling the opening rate of the burner until the linen is dried.
Furthermore, after the linen is dried, the drying time is controlled by the set linen drying humidity.
Further, the step (3) of cooling the dryer comprises time control and temperature control.
Further, the step (4) comprises the following steps: the loading door does not act, the unloading door is opened, the fan is closed, the inner drum of the dryer rotates forwards and backwards, and the dryer discharges materials in an inclined mode.
Further, the step (5) comprises the following steps: the loading door is closed, the unloading door is closed, the fan is stopped, the roller stops rotating, the fluff removing door is opened, the fluff removing oscillator is opened, fluff removing air is blown at a certain interval, and meanwhile the fluff collector is started.
Has the advantages that: the invention has the following beneficial effects:
(1) the invention combines PID control and drying process, realizes automatic control of the drying process, realizes balanced temperature control, optimizes the drying effect, and prevents the phenomenon that linen is yellow or hard due to overhigh temperature; the phenomenon of incomplete drying effect caused by too low temperature;
(2) according to the invention, the air inlet PID control and the air outlet PID control are combined in the process, so that the balanced temperature control of the air inlet and the air outlet is respectively realized, the problem of unstable temperature of the air inlet and the air outlet of the existing gas dryer is solved, and finally, a good drying effect is realized;
(3) in the drying step, the control of the opening rate of the burner is optimized, the drying efficiency is improved, and meanwhile, the damage to the linen is avoided; setting a temperature threshold range to start air inlet temperature PID control or air outlet temperature PID control;
(4) the drying device also comprises a humidity adjusting function after the drying step, and the linen after drying can be further dried according to different linen and different customer requirements, so that the humidity of the linen is adjusted, and different requirements are met.
Drawings
FIG. 1 is a schematic overall process flow diagram of one embodiment of the present invention;
fig. 2 is a schematic flow chart of a drying process according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships shown only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Example 1
As shown in fig. 1, an automatic drying control process for a gas dryer includes the following steps:
(1) feeding into a dryer: loading linen to be dried into a dryer; starting a fan at the feeding stage, wherein the starting frequency is 40-50 HZ; the loading door is automatically opened, the unloading door is automatically closed, the inner cylinder of the dryer rotates forwards and backwards, and the rotation frequency is 30-40 HZ;
(2) drying by a dryer: starting a drying program, starting a burner, starting a PID automatic temperature control program when the conditions are met, and automatically adjusting the temperature of inlet air and outlet air of the dryer; in the drying stage, the rotation frequency of a fan is increased to 50-60HZ, a loading door is closed, an unloading door is closed, an inner cylinder of the dryer rotates forwards at the rotation frequency of 35-45HZ, a burner is started, and an air return door is opened;
(3) cooling the dryer: after drying is finished, the loading door is opened for natural cooling, cooling is finished after conditions are met, the drying machine cooling comprises time control and temperature control, namely after a certain time or a preset temperature value is met, the system judges that cooling is finished;
(4) discharging of the dryer: unloading and outputting the dried and cooled linen, wherein the loading door does not act in the discharging stage, the unloading door is opened, the fan is closed, the inner cylinder of the dryer rotates forwards and backwards, the rotating frequency is 35-45HZ, and the dryer discharges materials in an inclined manner;
(5) removing velvet by a dryer: after discharging and unloading are finished, starting a lint removing program, and performing lint removing operation on the inside of the dryer; the loading door is closed, the unloading door is closed, the fan is stopped, the roller stops rotating, the fluff removing door is opened, the fluff removing oscillator is opened, fluff removing air is blown at a certain interval, and meanwhile the fluff collector is started.
Example 2
As shown in fig. 1 and 2, an automatic drying control process for a gas dryer includes the following steps:
(1) feeding into a dryer: loading linen to be dried into a dryer; starting a fan at the feeding stage, wherein the starting frequency is 40-50 HZ; the loading door is automatically opened, the unloading door is automatically closed, the inner cylinder of the dryer rotates forwards and backwards, and the rotation frequency is 30-40 HZ;
(2) drying by a dryer: starting a drying program, starting a burner, starting a PID automatic temperature control program when the conditions are met, and automatically adjusting the temperature of inlet air and outlet air of the dryer; in the drying stage, the rotation frequency of a fan is increased to 50-60HZ, a loading door is closed, an unloading door is closed, an inner cylinder of the dryer rotates forwards at the rotation frequency of 35-45HZ, a burner is started, and a return air door is opened.
In this embodiment, the starting program of the burner at the drying stage of the dryer specifically includes:
(a) when the combustor is just started, the opening rate of the combustor is 100 percent; the full opening of the burner at the initial stage is beneficial to rapid temperature rise, so that the dryer can be conveyed at high temperature with maximum efficiency;
(b) when the temperature of the air inlet reaches 160-170 ℃, the opening rate of the burner is reduced to 80 percent; when the temperature of the air inlet reaches 160-170 ℃, the opening rate of the burner is reduced to 80 percent in order to avoid damaging the linen in the dryer and avoid the uncontrollable PID caused by overlarge temperature inertia;
(c) when the temperature of the air inlet reaches 180 ℃ and 190 ℃, the opening rate of the burner is reduced to 60 percent; when the temperature of the air inlet reaches 160-;
(d) when the temperature of the air inlet reaches 190-; the PID control of the inlet air temperature means that the temperature of the air inlet is stabilized by controlling the opening rate of the burner until the temperature of the air outlet reaches a preset value so as to start the PID control of the outlet air temperature. That is, before the outlet air temperature PID control is performed, the inlet air temperature PID control is adopted. The purpose of air inlet temperature PID control is exactly to maintain the air intake temperature, realizes that balanced temperature carries to in the drying-machine, avoids the high temperature or crosses low excessively, and the high temperature can cause the damage to the linen, and the temperature crosses low excessively, can not reach the stoving in the drying-machine and predetermine the temperature, can't realize drying.
When the air inlet temperature is specifically controlled by PID control, the temperature of the air inlet of the dryer is monitored in real time, and a threshold value, for example 200 ℃, can be set for the temperature of the air inlet. When the temperature of the air inlet is lower than a preset threshold value, the PID control increases the opening rate of the burner by 5% -10% until the temperature of the air inlet rises to reach the preset threshold value; when the temperature of the air inlet is higher than a preset threshold value, the PID control reduces the opening rate of the combustor by 5% -10% until the temperature of the air inlet is reduced to the preset threshold value.
The PID control of the inlet air temperature is finally realized in such a way that the temperature of the inlet air is always maintained within a set threshold range or a temperature value.
(e) When the temperature of the air outlet reaches 100-110 ℃, the PID control of the air outlet temperature is started.
When the temperature of the air outlet reaches 100-110 ℃, the temperature in the dryer reaches the drying requirement at the moment, and the temperature only needs to be maintained within the temperature range, and the PID control of the air outlet temperature is needed at the moment.
In this embodiment, the PID control of the outlet air temperature means that the temperature of the outlet air is stabilized by controlling the opening rate of the burner until the linen is dried. The purpose of PID control of the air outlet temperature is to maintain the temperature of an air outlet within a set range, realize the drying of the balanced temperature in the dryer and avoid the phenomenon that the temperature is too high or too low, and the temperature is too high to cause damage to the linen and cause the linen to turn hard; the temperature is low excessively, the preset drying temperature cannot be reached in the dryer, drying cannot be realized, and the drying effect is not ideal.
When the air outlet temperature PID is specifically controlled, the temperature of the air outlet of the dryer is monitored in real time, and a threshold range can be set for the temperature of the air outlet, for example, 100 plus 110 ℃. When the temperature of the air outlet is lower than the range of a preset threshold value, the PID control increases the opening rate of the burner by 5% -10% until the temperature of the air outlet rises to reach the preset threshold value; when the temperature of the air outlet is higher than the range of the preset threshold value, the PID control reduces the opening rate of the burner by 5% -10% until the temperature of the air outlet is reduced to the range of the preset threshold value.
The PID control of the air outlet temperature is finally realized in such a way that the temperature of the air outlet always keeps floating up and down within the set threshold range, so that the drying temperature is ensured, the drying efficiency is improved, meanwhile, the damage to the linen is avoided, and the phenomenon that the linen is yellow or hard is prevented.
In this embodiment, when carrying out air-out temperature PID control, the temperature of air intake can reduce gradually this moment, also can have the circumstances that risees to appear at the in-process that reduces, because when air-out temperature PID controls, can appear increasing the condition of combustor rate of opening, consequently can have the condition of transient temperature rise, then reduction.
The temperature of the air inlet is slowly reduced, when the temperature of the air inlet is reduced to the temperature of the air outlet plus the set temperature, the system judges that the linen is dried, and the drying process is finished.
In this embodiment, after the linen is dried, it is determined that the drying setting condition is reached, and the drying time can be controlled by the set linen drying humidity. That is, according to different linen, after the system achieves the preset drying condition according to the linen, the drying can be finished in principle and the next procedure is started; but different linen and the humidity degree that the customer required are different, consequently after normal drying, can also be directed against different humidity requirements, continue to dry for a period to satisfy the humidity requirement. The sensitivity of the general dry-humidity is adjusted by the PID control parameter of the air outlet temperature.
(3) Cooling the dryer: after drying, the loading door is half opened for natural cooling, and cooling is finished after conditions are met, wherein the drying machine cooling comprises time control and temperature control, namely after a certain time or a preset temperature value is met, the system judges that cooling is finished;
(4) discharging of the dryer: unloading and outputting the dried and cooled linen, wherein a loading door does not act in a discharging stage, the unloading door is opened, a fan is closed, an inner cylinder of the dryer rotates forwards and backwards, the rotating frequency is 35-45HZ, the dryer discharges materials obliquely, and the discharging time is generally set to be 45-60 seconds;
(5) removing velvet by a dryer: after discharging and unloading are finished, starting a lint removing program, and performing lint removing operation on the inside of the dryer; the loading door is closed, the unloading door is closed, the fan is stopped, the roller stops rotating, the lint removing door is opened, the lint removing oscillator is opened, the lint removing air blowing is used for blowing air once every 5 seconds, the single air blowing time is 1 second, the fluff collector is started, and the lint removing air blowing frequency is 5-10 times.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The automatic drying control process of the gas dryer is characterized in that: the method comprises the following steps:
(1) feeding into a dryer: loading linen to be dried into a dryer;
(2) drying by a dryer: starting a drying program, starting a burner, starting a PID automatic temperature control program when the conditions are met, and automatically adjusting the temperature of inlet air and outlet air of the dryer;
(3) cooling the dryer: after drying is finished, opening the loading door for natural cooling, and finishing cooling after conditions are met;
(4) discharging of the dryer: unloading and outputting the dried and cooled linen;
(5) removing velvet by a dryer: and after the discharging and unloading are finished, starting a lint removing program, and removing the lint inside the dryer.
2. The automatic drying control process of the gas dryer according to claim 1, characterized in that: the step (1) comprises the following steps: the fan is started, the loading door is automatically opened, the unloading door is automatically closed, and the inner cylinder of the dryer rotates forwards and backwards.
3. The automatic drying control process of the gas dryer according to claim 1, characterized in that: the step (2) comprises the following steps: the rotation frequency of the fan is increased, the loading door is closed, the unloading door is closed, the inner cylinder of the dryer rotates forwards, the burner is started, and the return air door is opened.
4. The automatic drying control process of the gas dryer according to claim 1, characterized in that: the starting program of the burner in the step (2) specifically comprises:
(a) when the combustor is just started, the opening rate of the combustor is 100 percent;
(b) when the temperature of the air inlet reaches 160-170 ℃, the opening rate of the burner is reduced to 80 percent;
(c) when the temperature of the air inlet reaches 180 ℃ and 190 ℃, the opening rate of the burner is reduced to 60 percent;
(d) when the temperature of the air inlet reaches 190-;
(e) when the temperature of the air outlet reaches 100-110 ℃, the PID control of the air outlet temperature is started.
5. The automatic drying control process of the gas dryer according to claim 4, characterized in that: and (d) the air inlet temperature PID control means that the temperature of the air inlet is stabilized by controlling the opening rate of the burner until the temperature of the air outlet reaches a preset value so as to start the air outlet temperature PID control.
6. The automatic drying control process of the gas dryer according to claim 4, characterized in that: and (e) the PID control of the air outlet temperature means that the temperature of an air outlet is stabilized by controlling the opening rate of a burner until the linen is dried.
7. The automatic drying control process of the gas dryer according to claim 6, characterized in that: and after the linen is dried, the drying time is controlled by the set linen drying humidity.
8. The automatic drying control process of the gas dryer according to claim 1, characterized in that: and (3) cooling the dryer, wherein the cooling comprises time control and temperature control.
9. The automatic drying control process of the gas dryer according to claim 1, characterized in that: the step (4) comprises the following steps: the loading door does not act, the unloading door is opened, the fan is closed, the inner drum of the dryer rotates forwards and backwards, and the dryer discharges materials in an inclined mode.
10. The automatic drying control process of the gas dryer according to claim 1, characterized in that: the step (5) comprises the following steps: the loading door is closed, the unloading door is closed, the fan is stopped, the roller stops rotating, the fluff removing door is opened, the fluff removing oscillator is opened, fluff removing air is blown at a certain interval, and meanwhile the fluff collector is started.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210058060.3A CN114322532A (en) | 2022-01-19 | 2022-01-19 | Automatic drying control process of gas dryer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210058060.3A CN114322532A (en) | 2022-01-19 | 2022-01-19 | Automatic drying control process of gas dryer |
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| CN106480685A (en) * | 2015-08-31 | 2017-03-08 | 青岛海尔洗衣机有限公司 | A kind of clothes drying method and dryer |
| CN208293277U (en) * | 2018-04-10 | 2018-12-28 | 广东工贸职业技术学院 | A kind of intelligence hot wind clothing dryer |
| CN111059885A (en) * | 2019-12-27 | 2020-04-24 | 青岛联盛益康食品科技有限公司 | Dehydrated vegetable is dried and is used safe automatic control detecting system |
| CN112815655A (en) * | 2021-01-04 | 2021-05-18 | 上海威士机械有限公司 | Control method of through type dryer |
-
2022
- 2022-01-19 CN CN202210058060.3A patent/CN114322532A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01167569A (en) * | 1987-12-23 | 1989-07-03 | Kaneko Agricult Mach Co Ltd | Drying control method for cereal |
| CN102066648A (en) * | 2008-06-27 | 2011-05-18 | 大宇电子株式会社 | Method for controlling the gas valve of a dryer |
| CN102099524A (en) * | 2008-07-14 | 2011-06-15 | 伊莱克斯家用产品股份有限公司 | Laundry drying machine with vibrating fluff filter |
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| CN208293277U (en) * | 2018-04-10 | 2018-12-28 | 广东工贸职业技术学院 | A kind of intelligence hot wind clothing dryer |
| CN111059885A (en) * | 2019-12-27 | 2020-04-24 | 青岛联盛益康食品科技有限公司 | Dehydrated vegetable is dried and is used safe automatic control detecting system |
| CN112815655A (en) * | 2021-01-04 | 2021-05-18 | 上海威士机械有限公司 | Control method of through type dryer |
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Application publication date: 20220412 |