CN115540582B - Drying adjustment method, dryer, electronic device and storage medium - Google Patents
Drying adjustment method, dryer, electronic device and storage medium Download PDFInfo
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- CN115540582B CN115540582B CN202210950460.5A CN202210950460A CN115540582B CN 115540582 B CN115540582 B CN 115540582B CN 202210950460 A CN202210950460 A CN 202210950460A CN 115540582 B CN115540582 B CN 115540582B
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- 238000001035 drying Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 58
- 230000008859 change Effects 0.000 claims abstract description 84
- 238000004590 computer program Methods 0.000 claims description 13
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000001276 controlling effect Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
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- 238000004364 calculation method Methods 0.000 description 1
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- 239000003507 refrigerant Substances 0.000 description 1
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Classifications
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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
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
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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
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- Engineering & Computer Science (AREA)
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- Control Of Washing Machine And Dryer (AREA)
Abstract
The invention provides a drying adjusting method, a dryer, electronic equipment and a storage medium, which belong to the technical field of drying and comprise the following steps: acquiring the return air humidity of the dryer, and determining a target temperature corresponding to the return air humidity; determining a compressor frequency based on a temperature difference between a target temperature and a return air temperature of the dryer, and executing a control flow based on the compressor frequency; in the control flow, controlling the dryer to run at the compressor frequency, and acquiring a change value of the return air temperature after running for a preset time at the compressor frequency; and updating the frequency of the compressor based on the change value, and returning to the execution control flow until the return air humidity is less than or equal to a preset humidity threshold. According to the drying adjusting method, the dryer, the electronic equipment and the storage medium, the humidity state of the object to be dried is determined by utilizing the return air humidity, and then the frequency of the compressor of the dryer is adjusted according to the humidity state and the return air temperature, so that the aims of energy conservation and emission reduction are achieved while accurate drying is realized.
Description
Technical Field
The present invention relates to the field of drying technologies, and in particular, to a drying adjustment method, a dryer, an electronic device, and a storage medium.
Background
The common heat pump dryer unit mainly comprises main parts such as a heat pump compressor, a controller, a condenser, an expansion valve, an evaporator and the like, and in the drying process, the thermodynamic cycle process of evaporation, compression, condensation, throttling and re-evaporation is continuously repeated in the system by the refrigerant, and meanwhile, the heat released in the thermodynamic cycle process is continuously transferred into a drying chamber, so that the required materials are continuously dried.
The heat pump dryer utilizes the condensation heat of the air conditioner to heat and dehumidify objects, and when materials in a drying room are baked through heat pump drying equipment, the dryer can continuously heat in a high power mode in order to ensure the baking quality of the materials.
However, the control method is simple and rough, and has poor drying efficiency, and high energy consumption is caused.
Disclosure of Invention
The drying adjusting method, the dryer, the electronic equipment and the storage medium are used for solving the problems that in the prior art, the control method is simple and coarse, the drying efficiency is poor, and meanwhile, high energy consumption is caused, and achieving the aims of energy conservation and emission reduction while accurately drying.
The invention provides a drying adjusting method, which comprises the following steps:
acquiring the return air humidity of a dryer, and determining a target temperature corresponding to the return air humidity;
determining a compressor frequency based on a temperature difference between the target temperature and a return air temperature of the dryer, and executing a control flow based on the compressor frequency;
in the control flow, controlling the dryer to run at the compressor frequency, and acquiring a change value of the return air temperature after running for a preset time at the compressor frequency;
And updating the frequency of the compressor based on the change value, and returning to execute the control flow until the return air humidity is less than or equal to a preset humidity threshold.
According to the drying adjustment method provided by the invention, the updating of the compressor frequency based on the change value comprises the following steps:
determining a current change value interval in which the change value is located from a plurality of change value intervals corresponding to the temperature difference;
And updating the compressor frequency based on the compressor frequency updating rule corresponding to the current variation value interval.
According to the drying adjusting method provided by the invention, the plurality of change value intervals comprise a first change value interval and a second change value interval, and the change value in the first change value interval is larger than the change value in the second change value interval;
The compressor frequency updating rule corresponding to the first variation value interval is to reduce or maintain the compressor frequency, and the compressor frequency updating rule corresponding to the second variation value interval is to increase or maintain the compressor frequency.
According to the drying adjustment method provided by the invention, the method for determining the frequency of the compressor based on the temperature difference between the target temperature and the return air temperature of the dryer comprises the following steps:
Determining a current temperature difference interval in which the temperature difference between the target temperature and the return air temperature of the dryer is located from a plurality of temperature difference intervals under the condition that the temperature difference between the target temperature and the return air temperature of the dryer is greater than a temperature difference threshold;
Taking the preset compressor frequency corresponding to the current temperature difference interval as the compressor frequency;
the temperature difference threshold is a negative number, the temperature difference intervals are arranged in sequence from large to small according to the temperature difference, and the preset compressor frequencies corresponding to the temperature difference intervals are sequentially decreased.
According to the drying adjustment method provided by the invention, the determining of the target temperature corresponding to the return air humidity further comprises the following steps:
And under the condition that the temperature difference between the target temperature and the return air temperature of the dryer is smaller than or equal to the temperature difference threshold value, reducing the compressor frequency, controlling the dryer to operate at the reduced compressor frequency, acquiring the temperature difference after the reduced compressor frequency is operated for the preset time period, and comparing the temperature difference with the temperature difference threshold value.
According to the drying regulation method provided by the invention, the determining of the target temperature corresponding to the return air humidity comprises the following steps:
under the condition that the return air humidity is larger than a preset humidity threshold value, determining a current humidity interval in which the return air humidity is located from a plurality of humidity intervals;
taking the preset temperature corresponding to the current humidity interval as the target temperature;
The humidity intervals are arranged in sequence from big to small in humidity, and the preset temperatures corresponding to the humidity intervals are gradually decreased.
According to the drying adjustment method provided by the invention, the method for acquiring the return air humidity of the dryer further comprises the following steps:
and closing a compressor in the dryer under the condition that the duration time length of the return air humidity is smaller than or equal to the preset humidity threshold value is longer than the preset duration time threshold value.
According to the drying adjustment method provided by the invention, the method for acquiring the return air humidity of the dryer comprises the following steps:
And acquiring the return air humidity of the dryer under the condition that the temperature difference between the target temperature and the return air temperature of the dryer is in a preset temperature interval.
The invention also provides a dryer, which comprises a dryer body, wherein a processor, a temperature sensor and a humidity sensor are arranged in the dryer body;
the temperature sensor and the humidity sensor are both arranged at an air return opening of the dryer body;
The temperature sensor is used for collecting return air temperature and sending the return air temperature to the processor;
The humidity sensor is used for collecting the return air humidity and sending the return air humidity to the processor;
The dryer body further includes a memory and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, performs the method of adjusting drying as set forth in any one of the preceding claims.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements any one of the above drying adjustment methods when executing the program.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a drying adjustment method as described in any one of the above.
The present invention also provides a computer program product comprising a computer program which, when executed by a processor, implements a method of drying adjustment as described in any one of the above.
According to the drying adjusting method, the dryer, the electronic equipment and the storage medium, through temperature and humidity monitoring of the return air inlet of the dryer, the humidity state of an object to be dried is determined by utilizing the return air humidity, and then the frequency of the compressor of the dryer is adjusted according to the humidity state and the return air temperature, so that the aims of energy conservation and emission reduction are achieved while accurate drying is achieved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a drying adjustment method provided by the invention;
fig. 2 is a schematic structural view of a dryer provided by the present invention;
Fig. 3 is a schematic structural diagram of an electronic device provided by the present invention.
Reference numerals:
1: a dryer; 100: an air outlet; 200: an air return port; 11: an evaporator; 12: a first electronic expansion valve; 13: a compressor; 14: a second electronic expansion valve; 15: a condenser; 16: a dehumidification module; 17: a fresh air valve; 18: an air outlet fan; 19: a heater; 20: a humidity sensor; 21: a temperature sensor.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The drying adjusting method, the dryer, the electronic device and the storage medium provided by the embodiment of the invention are described below with reference to fig. 1 to 3.
According to the drying adjusting method provided by the embodiment of the invention, the execution main body can be the electronic equipment or the software or the functional module or the functional entity capable of realizing the drying adjusting method in the electronic equipment, and the electronic equipment comprises a processor of a dryer. The execution body is not limited to the present invention.
Fig. 1 is a schematic flow chart of the drying adjustment method provided by the invention, as shown in fig. 1, including but not limited to the following steps:
first, in step S1, the return air humidity of the dryer is acquired, and a target temperature corresponding to the return air humidity is determined.
The dryer can be a heat pump dryer, and a temperature sensor and a humidity sensor can be arranged at an air return opening of the dryer, so that the temperature sensor is used for collecting air return temperature TC according to the collection frequency and sending the air return temperature TC to the processor, the unit of the air return temperature TC is the temperature, and the humidity sensor is used for collecting air return humidity RH according to the collection frequency and sending the air return humidity RH to the processor.
The processor can obtain the return air humidity RH of the dryer and the target temperature TCm corresponding to the return air humidity, and the unit is the temperature.
For example, when the return air humidity RH is (85%, 100% ], the target temperature TCm corresponding to the return air humidity RH is the highest set temperature Tmax of the dryer in degrees celsius.
For another example, in the case that the return air humidity RH is (RHm, 85% ], the target temperature TCm corresponding to the return air humidity RH is set to Tmax-10 in degrees celsius, where the preset humidity threshold RHm should be [0, 85%), which may be flexibly set according to the drying degree requirement of the object to be dried, for example, the preset humidity threshold RHm is set to 30%.
Fig. 2 is a schematic structural view of a dryer provided by the present invention, and as shown in fig. 2, the dryer 1 includes an evaporator 11, a first electronic expansion valve 12 and a compressor 13, which are external, and a second electronic expansion valve 14, a condenser 15, a dehumidifying module 16, a fresh air valve 17, an air outlet fan 18, a heater 19, a humidity sensor 20 and a temperature sensor 21, which are internal; wherein, the air outlet fan 18 is installed at the air outlet 100, and the humidity sensor 20 and the temperature sensor 21 are both installed at the air return 200.
Next, in step S2, a compressor frequency is determined based on a temperature difference between the target temperature and a return air temperature of the dryer, and a control flow described below is performed based on the compressor frequency.
For example, when the return air humidity RH is (85%, 100%) and the object to be dried contains a lot of moisture, the object to be dried needs to be heated continuously.
For another example, in the case where the return air humidity RH is at (RHm, 85% ], the moisture in the object to be dried is not much, and the maximum power of the dryer is not required at this time, the target temperature TCm=Tmax-10 is set, and the temperature difference TCm-TC=Tmax-10-TC between the target temperature TCm and the return air temperature TC of the dryer.
After resetting the target temperature TCm, the compressor frequency f of the dryer is adjusted to the maximum compressor frequency fmax of the dryer in the case that the temperature difference TCm-TC is at (2, 10), the compressor frequency f of the dryer is kept unchanged in the case that the temperature difference TCm-TC is at (-2, 2), and the temperature in the dryer is excessively high in the case that the temperature difference TCm-TC is less than or equal to-2, and the compressor frequency f of the dryer is adjusted by 2Hz.
Under the condition that the return air humidity RH is less than or equal to RHm, the moisture of the object to be dried is close to the drying standard, the current running state of the dryer is maintained, the return air humidity RH is continuously monitored until the object to be dried reaches the drying standard, for example, the new return air humidity RH collected in 3 continuous minutes is not greater than RHm, and the dryer stops heating.
Next, in step S3, in the control flow, the dryer is controlled to operate at the compressor frequency, and a change value of the return air temperature after the dryer operates at the compressor frequency for a preset period of time is obtained.
The preset time period may be set to 1 minute.
The processor of the dryer executes the following control flow, the dryer works according to the adjusted compressor frequency, the return air temperature is continuously collected according to the collection frequency, and the preset duration can comprise one collection period or a plurality of collection periods. The starting time of the preset duration is the starting time of one acquisition period, and the ending time of the preset duration is the starting time of the other acquisition period. For example, the acquisition frequency may be set to 1 acquisition every 1 minute, the acquisition period being 1 minute, and the preset duration being 1 minute in the case where the preset duration includes only one acquisition period.
And when the return air temperature at the starting moment of the preset time is t0 and the return air temperature at the stopping moment of the preset time is t1, the change value delta t=t1-t 0 of the return air temperature after the preset time is so as to judge the change trend of the return air temperature in the preset time. The cut-off return air temperature of the former preset time period can be used as the initial return air temperature of the latter preset time period.
Subsequently, in step S4, the compressor frequency is updated based on the change value, and the control procedure is executed again until the return air humidity is less than or equal to a preset humidity threshold.
And under the condition that the temperature difference TCm-TC is (2, 10) and the change value delta t is more than 0, the compressor frequency is adjusted downwards by 1Hz, the dryer operates according to the adjusted compressor frequency, 1 new return air temperature TC is acquired every 1 minute, the new temperature difference TCm-TC and the new change value delta t are calculated, and the current change value interval where the change value delta t is judged again so as to update the compressor frequency.
And under the condition that the temperature difference TCm-TC is (2, 10) and the variation value delta t is less than or equal to 0, keeping the compressor frequency unchanged, operating the dryer according to the compressor frequency, collecting 1 time of new return air temperature TC every 1 minute, calculating a new temperature difference TCm-TC and a new variation value delta t, and re-judging the current variation value interval where the variation value delta t is positioned so as to update the compressor frequency.
And under the condition that the value of the temperature difference TCm-TC is (-2, 2) and the change value delta t is more than 0, the compressor frequency of the dryer is adjusted downwards by 1Hz, the dryer operates according to the adjusted compressor frequency, the new return air temperature TC is collected for 1 time every 1 minute, the new temperature difference TCm-TC and the new change value delta t are calculated, and the current change value interval where the change value delta t is judged again so as to update the compressor frequency.
And under the condition that the value of the temperature difference TCm-TC is (-2, 2) and the change value delta t is less than or equal to 0, the compressor frequency of the dryer is adjusted by 1Hz, the dryer operates according to the adjusted compressor frequency, the new return air temperature TC is collected for 1 time every 1 minute, the new temperature difference TCm-TC and the new change value delta t are calculated, and the current change value interval where the change value delta t is judged again so as to update the compressor frequency.
Under the condition that the temperature difference TCm-TC is less than or equal to minus 2, the temperature in the dryer is too high, the compressor frequency is adjusted downwards by 2Hz, the dryer operates according to the adjusted compressor frequency, 1 new return air temperature TC is collected every 1 minute, and the new temperature difference TCm-TC is calculated until the new temperature difference TCm-TC is (-2, 10).
Until the monitored return air humidity RH is less than or equal to RHm, the moisture of the object to be dried approaches the drying standard, the current running state of the dryer is maintained, the new return air humidity RH is continuously collected according to the collection frequency of 1 time every 1 minute until the new return air humidity RH collected in 3 minutes continuously is not greater than RHm, the object to be dried reaches the drying standard, and the dryer stops heating.
According to the drying adjusting method provided by the invention, through temperature and humidity monitoring of the return air inlet of the dryer, the humidity state of the object to be dried is determined by utilizing the return air humidity, and then the frequency of the compressor of the dryer is adjusted according to the humidity state and the return air temperature, so that the aims of energy conservation and emission reduction are achieved while accurate drying is realized.
Optionally, the acquiring the return air humidity of the dryer includes:
And acquiring the return air humidity of the dryer under the condition that the temperature difference between the target temperature and the return air temperature of the dryer is in a preset temperature interval.
The preset temperature interval may be set to [ -2,2] in degrees celsius.
For example, the dryer is provided with an initial target temperature TCm, and in the case that the temperature difference TCm-TC between the target temperature TCm and the return air temperature TC of the dryer at the time is within the preset temperature interval [ -2,2], for example, TCm-tc=1, the target temperature is not greatly different from the return air temperature, and the temperature in the dryer is higher and approaches the target temperature, and the return air humidity RH of the dryer at the time is obtained to determine whether further heating is needed.
According to the drying adjusting method provided by the invention, under the condition that the target temperature and the return air temperature are not greatly different, the return air humidity is obtained to judge the dryness of the object to be dried, and a foundation is provided for temperature and frequency control of the dryer.
Optionally, the determining the target temperature corresponding to the return air humidity includes:
under the condition that the return air humidity is larger than a preset humidity threshold value, determining a current humidity interval in which the return air humidity is located from a plurality of humidity intervals;
taking the preset temperature corresponding to the current humidity interval as the target temperature;
The humidity intervals are arranged in sequence from big to small in humidity, and the preset temperatures corresponding to the humidity intervals are gradually decreased.
For example, in the case where the preset humidity threshold RHm is set to 30%, the plurality of humidity sections may be set to [0, 30% ], (30%, 85% ] and (85%, 100% ], respectively.
Under the condition that the return air humidity RH is more than 30%, determining a current humidity interval in which the return air humidity RH is positioned from a plurality of humidity intervals;
In the case where the current humidity interval is (30%, 85% ], the preset temperature is Tmax-10, and correspondingly, the target temperature tcm=tmax-10, tmax is the highest set temperature of the dryer in degrees celsius.
In the case where the current humidity interval is (85%, 100% ], the preset temperature is Tmax, and correspondingly, the target temperature tcm=tmax.
According to the drying adjusting method provided by the invention, the corresponding temperature of the dryer is set by utilizing the gear where the return air humidity is located, so that the fine adjustment of the dryer is realized.
Optionally, the acquiring the return air humidity of the dryer further comprises:
and closing a compressor in the dryer under the condition that the duration time length of the return air humidity is smaller than or equal to the preset humidity threshold value is longer than the preset duration time threshold value.
The preset humidity threshold RHm and the preset duration threshold may be flexibly set according to the drying degree requirement of the object to be dried, where the preset humidity threshold RHm needs to be less than 85%, for example, the preset humidity threshold RHm is set to 30%, and the preset duration threshold is set to 3 minutes.
Under the condition that the return air humidity RH is less than or equal to RHm, the moisture of the object to be dried is close to the drying standard, the current running state of the dryer is maintained, the return air humidity RH of the dryer is continuously monitored, under the condition that the duration time of the return air humidity RH is less than or equal to RHm is longer than 3 minutes, the object to be dried reaches the drying standard, and a compressor in the dryer is turned off.
According to the drying adjusting method provided by the invention, whether the object to be dried meets the drying standard can be simply and accurately judged by continuously monitoring the air return humidity of the dryer.
Optionally, the determining the target temperature corresponding to the return air humidity further includes:
And under the condition that the temperature difference between the target temperature and the return air temperature of the dryer is smaller than or equal to the temperature difference threshold value, reducing the compressor frequency, controlling the dryer to operate at the reduced compressor frequency, acquiring the temperature difference after the reduced compressor frequency is operated for the preset time period, and comparing the temperature difference with the temperature difference threshold value.
For example, the temperature difference threshold may be set at-2 in degrees celsius; the preset time period may be set to 1 minute.
In case the temperature difference between the target temperature TCm and the return air temperature TC of the dryer is less than or equal to the temperature difference threshold, i.e., TCm-TC is less than or equal to-2, at this time the dryer temperature is too high, the compressor frequency should be lowered, for example, the compressor frequency is lowered by 2Hz, i.e., the compressor frequency f=f-2, and the dryer is controlled to operate at the lowered compressor frequency, and the temperature difference TCm-TC after a preset period of time at the lowered compressor frequency is obtained, and the temperature difference TCm-TC is compared with the temperature difference threshold until TCm-TC is at (-2, 10].
According to the drying adjusting method provided by the invention, the frequency of the compressor of the dryer is adjusted according to the temperature difference between the return air temperature and the target temperature, so that the overheating of the dryer is effectively avoided, and the safe operation of the dryer is ensured.
Optionally, the determining the compressor frequency based on the temperature difference between the target temperature and the return air temperature of the dryer includes:
Determining a current temperature difference interval in which the temperature difference between the target temperature and the return air temperature of the dryer is located from a plurality of temperature difference intervals under the condition that the temperature difference between the target temperature and the return air temperature of the dryer is greater than a temperature difference threshold;
Taking the preset compressor frequency corresponding to the current temperature difference interval as the compressor frequency;
the temperature difference threshold is a negative number, the temperature difference intervals are arranged in sequence from large to small according to the temperature difference, and the preset compressor frequencies corresponding to the temperature difference intervals are sequentially decreased.
For example, the temperature difference threshold may be set at-2 in degrees celsius; accordingly, a plurality of temperature difference sections may be set as (-2, 2) and (2, 10), respectively.
Under the condition that the temperature difference TCm-TC between the target temperature TCm and the return air temperature TC of the dryer is > -2, determining the current temperature difference interval where the temperature difference TCm-TC between the target temperature TCm and the return air temperature TC of the dryer is located from a plurality of temperature difference intervals;
And under the condition that the current temperature difference interval is (-2, 2), the drying temperature in the dryer is close to the target temperature, and the preset compressor frequency is the current compressor frequency f of the dryer, namely, the compressor frequency is not adjusted.
Under the condition that the current temperature difference interval is (2, 10), the drying temperature in the dryer is insufficient, power is required to be increased, and the preset compressor frequency is the maximum compressor frequency fmax of the dryer so as to reduce the drying time.
And taking the preset compressor frequency corresponding to the current temperature difference interval as the compressor frequency.
According to the drying adjusting method provided by the invention, the drying temperature in the dryer is judged according to the return air temperature, and then the frequency of the compressor of the dryer is adjusted, so that the fine control of the dryer is realized.
Optionally, the updating the compressor frequency based on the change value includes:
determining a current change value interval in which the change value is located from a plurality of change value intervals corresponding to the temperature difference;
And updating the compressor frequency based on the compressor frequency updating rule corresponding to the current variation value interval.
For example, the preset time period is set to 1 minute.
Optionally, the plurality of variation value intervals includes a first variation value interval and a second variation value interval, and a variation value in the first variation value interval is greater than a variation value in the second variation value interval;
The compressor frequency updating rule corresponding to the first variation value interval is to reduce or maintain the compressor frequency, and the compressor frequency updating rule corresponding to the second variation value interval is to increase or maintain the compressor frequency.
For example, in the case where the temperature difference TCm-TC is (2, 10], the first variation value interval may be (- +, tx2], and the second variation value interval may be (tx 1, ++), where tx1 Σtx2, the values of tx1 and tx2 may be flexibly set according to the user's needs, for example, setting tx 1=tx2=0; in the case where the temperature difference TCm-TC is (-2, 2), the first variation value interval may be [0, + -infinity), and the second variation value interval may be (- + -infinity, 0).
The compressor frequency update rule may include:
When the temperature difference TCm-TC is (2, 10), the current change value interval of the change value delta t is (tx 1, ++ infinity), the compressor frequency updating rule is to adjust the compressor frequency by 1Hz, and then the dryer operates according to the adjusted compressor frequency.
At a temperature difference TCm-TC of (-2, 2), the current change value interval in which the change value deltat is located is (0, in the case of +++). The compressor frequency updating rule is that after the compressor frequency is adjusted down by 1Hz, the dryer operates according to the adjusted compressor frequency.
Under the condition that the temperature difference TCm-TC is (-2, 2), and the current variation value interval where the variation value delta t is (- ≡0), the compressor frequency updating rule is that the compressor frequency is up-regulated by 1Hz, and then the dryer operates according to the up-regulated compressor frequency.
And under the condition that TCm-TC is less than or equal to-2, the compressor frequency updating rule is that the compressor frequency is adjusted downwards by 2Hz, and the dryer operates according to the adjusted compressor frequency.
After the compressor frequency is adjusted, collecting the new return air temperature TC and the return air humidity RH for 1 time every 1 minute, calculating a new temperature difference TCm-TC and a new change value delta t, re-judging the current change value interval where the change value delta t is located, determining a corresponding compressor frequency updating rule to update the compressor frequency until the return air humidity RH is less than or equal to RHm, keeping the current running state of the dryer, continuously collecting the new return air humidity RH according to the collection frequency of 1 time every 1 minute until the new return air humidity RH collected in 3 minutes is not more than RHm, and stopping heating the dryer until the object to be dried reaches the drying standard.
According to the drying adjusting method provided by the invention, the compressor frequency is continuously and correspondingly adjusted by monitoring the temperature change of the dryer, so that the control is flexible, the drying time is reduced, and the energy consumption of the dryer is effectively reduced.
Optionally, the actual return air temperature TC and the return air humidity RH, the target temperature TCm and the preset humidity threshold RHm are obtained, and the return air humidity RH is judged when TCm-TC is in the preset temperature interval [ -2,2 ].
Further, after the target temperature TCm is reset after the target temperature TCm is adjusted to Tmax with the return air humidity RH being (85%, 100% ], the compressor frequency f is adjusted to the maximum value fmax of the compressor frequency with TCm-TC being (2, 10), the compressor frequency f of the dryer is kept unchanged with Tmax-TC being (-2, 2), and the compressor frequency is adjusted down by 2Hz with Tmax-TC being (-2, 10) until Tmax-TC is (-2, 10).
After the target temperature TCm is reset, the compressor frequency f is adjusted to the maximum value fmax of the compressor frequency with Tmax-10-TC at (30%, 85% ], the compressor frequency f of the dryer is maintained unchanged with Tmax-10-TC at (-2, 2), and the compressor frequency is adjusted by 2Hz with Tmax-10-TC < 2 until Tmax-10-TC is at (-2, 10].
The dryer works according to the adjusted compressor frequency, and continuously collects the return air temperature according to the frequency of 1 time per minute, so that the change value delta t of the return air temperature in any minute can be obtained.
And under the condition that the temperature difference TCm-TC is (2, 10) and the change value delta t is more than 0, the compressor frequency is adjusted downwards by 1Hz, the dryer operates according to the adjusted compressor frequency, 1 new return air temperature TC is acquired every 1 minute, the new temperature difference TCm-TC and the new change value delta t are calculated, and the current change value interval where the change value delta t is judged again so as to update the compressor frequency.
And under the condition that the temperature difference TCm-TC is (2, 10) and the variation value delta t is less than or equal to 0, keeping the compressor frequency unchanged, operating the dryer according to the compressor frequency, collecting 1 time of new return air temperature TC every 1 minute, calculating a new temperature difference TCm-TC and a new variation value delta t, and re-judging the current variation value interval where the variation value delta t is positioned so as to update the compressor frequency.
And under the condition that the value of the temperature difference TCm-TC is (-2, 2) and the change value delta t is more than 0, the compressor frequency of the dryer is adjusted downwards by 1Hz, the dryer operates according to the adjusted compressor frequency, the new return air temperature TC is collected for 1 time every 1 minute, the new temperature difference TCm-TC and the new change value delta t are calculated, and the current change value interval where the change value delta t is judged again so as to update the compressor frequency.
And under the condition that the value of the temperature difference TCm-TC is (-2, 2) and the change value delta t is less than or equal to 0, the compressor frequency of the dryer is adjusted by 1Hz, the dryer operates according to the adjusted compressor frequency, the new return air temperature TC is collected for 1 time every 1 minute, the new temperature difference TCm-TC and the new change value delta t are calculated, and the current change value interval where the change value delta t is judged again so as to update the compressor frequency.
Under the condition that the temperature difference TCm-TC is less than or equal to minus 2, the temperature in the dryer is too high, the compressor frequency is adjusted downwards by 2Hz, the dryer operates according to the adjusted compressor frequency, 1 new return air temperature TC is collected every 1 minute, and the new temperature difference TCm-TC is calculated until the new temperature difference TCm-TC is (-2, 10).
Until the monitored return air humidity RH is less than or equal to RHm, the moisture of the object to be dried approaches the drying standard, the current running state of the dryer is maintained, the new return air humidity RH is continuously collected according to the collection frequency of 1 time every 1 minute until the new return air humidity RH collected in 3 minutes continuously is not greater than RHm, the object to be dried reaches the drying standard, and the dryer stops heating.
The dryer provided by the present invention will be described below, and the dryer described below and the drying adjustment method described above may be referred to correspondingly to each other.
The invention provides a dryer which comprises a dryer body, wherein a processor, a temperature sensor and a humidity sensor are arranged in the dryer body;
the temperature sensor and the humidity sensor are both arranged at an air return opening of the dryer body;
The temperature sensor is used for collecting return air temperature and sending the return air temperature to the processor;
The humidity sensor is used for collecting the return air humidity and sending the return air humidity to the processor;
The dryer body further includes a memory and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, performs the method of adjusting drying as described in any of the embodiments above.
First, the processor acquires the return air humidity of the dryer and determines a target temperature corresponding to the return air humidity.
The dryer can be a heat pump dryer, and a temperature sensor and a humidity sensor can be arranged at an air return opening of the dryer, so that the temperature sensor is used for collecting return air temperature TC and sending the return air temperature TC to the processor, and the humidity sensor is used for collecting return air humidity RH and sending the return air humidity RH to the processor.
The processor can obtain the return air humidity RH of the dryer and the target temperature TCm corresponding to the return air humidity.
For example, when the return air humidity RH is (85%, 100% ], the target temperature TCm corresponding to the return air humidity RH is the highest set temperature Tmax of the dryer in degrees celsius.
For another example, in the case that the return air humidity RH is (RHm, 85% ], the target temperature TCm corresponding to the return air humidity RH is set to Tmax-10 in degrees celsius, where the preset humidity threshold RHm should be [0, 85%), which may be flexibly set according to the drying degree requirement of the object to be dried, for example, the preset humidity threshold RHm is set to 30%.
As shown in fig. 2, the dryer 1 includes an evaporator 11, a first electronic expansion valve 12 and a compressor 13 at the outside, and a second electronic expansion valve 14, a condenser 15, a dehumidification module 16, a fresh air valve 17, an air outlet fan 18, a heater 19, a humidity sensor 20 and a temperature sensor 21 at the inside; wherein, the air outlet fan 18 is installed at the air outlet 100, and the humidity sensor 20 and the temperature sensor 21 are both installed at the air return 200.
Next, the processor determines a compressor frequency based on a temperature difference between the target temperature and a return air temperature of the dryer, and performs a control flow described below based on the compressor frequency.
For example, when the return air humidity RH is (85%, 100%) and the object to be dried contains a lot of moisture, the object to be dried needs to be heated continuously.
For another example, in the case where the return air humidity RH is at (RHm, 85% ], the moisture of the object to be dried is not much, and in order to save electric power, the maximum power of the dryer is not required at this time.
After resetting the target temperature TCm, the compressor frequency f of the dryer is adjusted to the maximum compressor frequency fmax of the dryer in the case that the temperature difference TCm-TC is at (2, 10), the compressor frequency f of the dryer is kept unchanged in the case that the temperature difference TCm-TC is at (-2, 2), and the temperature in the dryer is excessively high in the case that the temperature difference TCm-TC is less than or equal to-2, and the compressor frequency f of the dryer is adjusted by 2Hz.
Under the condition that the return air humidity RH is less than or equal to RHm, the moisture of the object to be dried is close to the drying standard, the current running state of the dryer is maintained, the return air humidity RH is continuously monitored until the object to be dried reaches the drying standard, for example, the new return air humidity RH collected in 3 continuous minutes is not greater than RHm, and the dryer stops heating.
And then, in the control flow, the processor controls the dryer to run at the compressor frequency, and obtains the change value of the return air temperature after running for a preset time at the compressor frequency.
The preset time period may be set to 1 minute.
The processor of the dryer executes the following control flow, the dryer works according to the adjusted compressor frequency, the return air temperature is continuously collected according to the collection frequency, and the preset duration can comprise one collection period or a plurality of collection periods. The starting time of the preset duration is the starting time of one acquisition period, and the ending time of the preset duration is the starting time of the other acquisition period. For example, the acquisition frequency may be set to 1 acquisition every 1 minute, the acquisition period being 1 minute, and the preset duration being 1 minute in the case where the preset duration includes only one acquisition period.
And when the return air temperature at the starting moment of the preset time is t0 and the return air temperature at the stopping moment of the preset time is t1, the change value delta t=t1-t 0 of the return air temperature after the preset time is so as to judge the change trend of the return air temperature in the preset time. The cut-off return air temperature of the former preset time period can be used as the initial return air temperature of the latter preset time period.
And then, the processor updates the compressor frequency based on the change value, and returns to execute the control flow until the return air humidity is less than or equal to a preset humidity threshold.
And under the condition that the temperature difference TCm-TC is (2, 10) and the change value delta t is more than 0, the compressor frequency is adjusted downwards by 1Hz, the dryer operates according to the adjusted compressor frequency, 1 new return air temperature TC is acquired every 1 minute, the new temperature difference TCm-TC and the new change value delta t are calculated, and the current change value interval where the change value delta t is judged again so as to update the compressor frequency.
And under the condition that the temperature difference TCm-TC is (2, 10) and the variation value delta t is less than or equal to 0, keeping the compressor frequency unchanged, operating the dryer according to the compressor frequency, collecting 1 time of new return air temperature TC every 1 minute, calculating a new temperature difference TCm-TC and a new variation value delta t, and re-judging the current variation value interval where the variation value delta t is positioned so as to update the compressor frequency.
And under the condition that the value of the temperature difference TCm-TC is (-2, 2) and the change value delta t is more than 0, the compressor frequency of the dryer is adjusted downwards by 1Hz, the dryer operates according to the adjusted compressor frequency, the new return air temperature TC is collected for 1 time every 1 minute, the new temperature difference TCm-TC and the new change value delta t are calculated, and the current change value interval where the change value delta t is judged again so as to update the compressor frequency.
And under the condition that the value of the temperature difference TCm-TC is (-2, 2) and the change value delta t is less than or equal to 0, the compressor frequency of the dryer is adjusted by 1Hz, the dryer operates according to the adjusted compressor frequency, the new return air temperature TC is collected for 1 time every 1 minute, the new temperature difference TCm-TC and the new change value delta t are calculated, and the current change value interval where the change value delta t is judged again so as to update the compressor frequency.
Under the condition that the temperature difference TCm-TC is less than or equal to minus 2, the temperature in the dryer is too high, the compressor frequency is adjusted downwards by 2Hz, the dryer operates according to the adjusted compressor frequency, 1 new return air temperature TC is collected every 1 minute, and the new temperature difference TCm-TC is calculated until the new temperature difference TCm-TC is (-2, 10).
Until the monitored return air humidity RH is less than or equal to RHm, the moisture of the object to be dried approaches the drying standard, the current running state of the dryer is maintained, the new return air humidity RH is continuously collected according to the collection frequency of 1 time every 1 minute until the new return air humidity RH collected in 3 minutes continuously is not greater than RHm, the object to be dried reaches the drying standard, and the dryer stops heating.
According to the dryer provided by the invention, the temperature sensor and the humidity sensor are added to the return air inlet, so that the return air temperature and the humidity are monitored in real time, the state of an object to be dried is accurately judged, and the compressor and other components are controlled according to different states. Therefore, the purpose of accurately controlling the dryness of the objects to be dried is achieved, the calculation is simple, and the monitoring cost is effectively controlled.
Fig. 3 is a schematic structural diagram of an electronic device provided by the present invention, and as shown in fig. 3, the electronic device may include: processor 310, communication interface (Communications Interface) 320, memory 330 and communication bus 340, wherein processor 310, communication interface 320 and memory 330 communicate with each other via communication bus 340. Processor 310 may invoke logic instructions in memory 330 to perform a dry conditioning method comprising: acquiring the return air humidity of the dryer, and determining a target temperature corresponding to the return air humidity; determining a compressor frequency based on a temperature difference between a target temperature and a return air temperature of the dryer, and executing a control flow based on the compressor frequency; in the control flow, controlling the dryer to run at the compressor frequency, and acquiring a change value of the return air temperature after running for a preset time at the compressor frequency; and updating the frequency of the compressor based on the change value, and returning to the execution control flow until the return air humidity is less than or equal to a preset humidity threshold.
Further, the logic instructions in the memory 330 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product comprising a computer program, the computer program being storable on a non-transitory computer readable storage medium, the computer program, when executed by a processor, being capable of performing the drying adjustment method provided by the above methods, the method comprising: acquiring the return air humidity of the dryer, and determining a target temperature corresponding to the return air humidity; determining a compressor frequency based on a temperature difference between a target temperature and a return air temperature of the dryer, and executing a control flow based on the compressor frequency; in the control flow, controlling the dryer to run at the compressor frequency, and acquiring a change value of the return air temperature after running for a preset time at the compressor frequency; and updating the frequency of the compressor based on the change value, and returning to the execution control flow until the return air humidity is less than or equal to a preset humidity threshold.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the drying adjustment method provided by the above methods, the method comprising: acquiring the return air humidity of the dryer, and determining a target temperature corresponding to the return air humidity; determining a compressor frequency based on a temperature difference between a target temperature and a return air temperature of the dryer, and executing a control flow based on the compressor frequency; in the control flow, controlling the dryer to run at the compressor frequency, and acquiring a change value of the return air temperature after running for a preset time at the compressor frequency; and updating the frequency of the compressor based on the change value, and returning to the execution control flow until the return air humidity is less than or equal to a preset humidity threshold.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A drying adjustment method, characterized by comprising:
acquiring the return air humidity of a dryer, and determining a target temperature corresponding to the return air humidity;
the determining a target temperature corresponding to the return air humidity includes:
under the condition that the return air humidity is larger than a preset humidity threshold value, determining a current humidity interval in which the return air humidity is located from a plurality of humidity intervals;
taking the preset temperature corresponding to the current humidity interval as the target temperature;
The humidity intervals are arranged in sequence from the big humidity to the small humidity, and the preset temperatures corresponding to the humidity intervals are decreased in sequence;
determining a compressor frequency based on a temperature difference between the target temperature and a return air temperature of the dryer, and executing a control flow based on the compressor frequency;
in the control flow, controlling the dryer to run at the compressor frequency, and acquiring a change value of the return air temperature after running for a preset time at the compressor frequency;
updating the frequency of the compressor based on the change value, and returning to execute the control flow until the return air humidity is less than or equal to a preset humidity threshold value;
the updating the compressor frequency based on the change value includes:
determining a current change value interval in which the change value is located from a plurality of change value intervals corresponding to the temperature difference;
Updating the compressor frequency based on a compressor frequency updating rule corresponding to the current variation value interval;
The plurality of variation value intervals comprise a first variation value interval and a second variation value interval, and variation values in the first variation value interval are larger than variation values in the second variation value interval;
The compressor frequency updating rule corresponding to the first variation value interval is to reduce or maintain the compressor frequency, and the compressor frequency updating rule corresponding to the second variation value interval is to increase or maintain the compressor frequency.
2. The drying adjustment method according to claim 1, wherein the determining a compressor frequency based on a temperature difference between the target temperature and a return air temperature of the dryer includes:
Determining a current temperature difference interval in which the temperature difference between the target temperature and the return air temperature of the dryer is located from a plurality of temperature difference intervals under the condition that the temperature difference between the target temperature and the return air temperature of the dryer is greater than a temperature difference threshold;
Taking the preset compressor frequency corresponding to the current temperature difference interval as the compressor frequency;
the temperature difference threshold is a negative number, the temperature difference intervals are arranged in sequence from large to small according to the temperature difference, and the preset compressor frequencies corresponding to the temperature difference intervals are sequentially decreased.
3. The drying regulation method of claim 2, wherein the determining a target temperature corresponding to the return air humidity further comprises:
And under the condition that the temperature difference between the target temperature and the return air temperature of the dryer is smaller than or equal to the temperature difference threshold value, reducing the compressor frequency, controlling the dryer to operate at the reduced compressor frequency, acquiring the temperature difference after the reduced compressor frequency is operated for the preset time period, and comparing the temperature difference with the temperature difference threshold value.
4. The drying-conditioning method according to claim 1, wherein the acquiring the return air humidity of the dryer further comprises:
and closing a compressor in the dryer under the condition that the duration time length of the return air humidity is smaller than or equal to the preset humidity threshold value is longer than the preset duration time threshold value.
5. A drying adjustment method according to any one of claims 1 to 3, wherein said obtaining return air humidity of a dryer comprises:
And acquiring the return air humidity of the dryer under the condition that the temperature difference between the target temperature and the return air temperature of the dryer is in a preset temperature interval.
6. A dryer, comprising a dryer body, the dryer body comprising: a processor, a temperature sensor and a humidity sensor;
the temperature sensor and the humidity sensor are both arranged at an air return opening of the dryer body;
The temperature sensor is used for collecting return air temperature and sending the return air temperature to the processor;
The humidity sensor is used for collecting the return air humidity and sending the return air humidity to the processor;
The dryer body further includes a memory and a program or instructions stored on the memory and executable on the processor, which when executed by the processor performs the drying adjustment method according to any one of claims 1 to 5.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the drying adjustment method according to any one of claims 1 to 5 when executing the program.
8. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the drying adjustment method according to any one of claims 1 to 5.
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| CN113959190A (en) * | 2021-10-15 | 2022-01-21 | 青岛海尔空调电子有限公司 | Method and device for controlling heat pump dryer, electronic equipment and storage medium |
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| CN111365978A (en) * | 2020-03-23 | 2020-07-03 | 顺德职业技术学院 | Control method of open type variable frequency heat pump drying equipment |
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