CN109440418A - A kind of heat pump, which is washed, dries control method, system and device - Google Patents
A kind of heat pump, which is washed, dries control method, system and device Download PDFInfo
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- CN109440418A CN109440418A CN201811189282.9A CN201811189282A CN109440418A CN 109440418 A CN109440418 A CN 109440418A CN 201811189282 A CN201811189282 A CN 201811189282A CN 109440418 A CN109440418 A CN 109440418A
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- air inlet
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- frequency
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
- D06F58/206—Heat pump arrangements
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/30—Drying processes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/28—Electric heating
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Drying Of Solid Materials (AREA)
Abstract
It is washed the invention discloses a kind of heat pump and dries control method, system and device, belong to an electro-technical field.The method comprise the steps that drying beforehand control, matches suitable compressor original frequency according to air outlet real time temperature and heats up；Later period control is dried, after air inlet real time temperature reaches air inlet target temperature, compressor adjusts frequency according to the air inlet target temperature in real time, keeps air inlet real time temperature close to air inlet target temperature.The present invention realizes that heat pump system does not need to increase additional off-load accessory, guarantees that drying course is stablized, shortens drying time, reduces whole energy consumption.
Description
Technical field
The invention belongs to family's electro-technical fields, and in particular to a kind of heat pump, which is washed, dries control method, system and device.
Background technique
The air circulation of current existing heat-pump-type clothes drying device approximately as: after the condenser heating in heat pump system
Air by blower be sent into cloth drying room, that is, roller in, with wet wash carry out hot and humid area after Hot wet air heating be sucked back into steaming
It sends out and carries out cool-down dehumidification at device, the air after dehumidifying is heated by condenser again and is sent into roller, and circulation reaches repeatedly
Dehumidify drying effect.
The drying system of existing most heat pump clothes-drying, is controlled by invariable frequency compressor mostly, and drying course compressor is with same
The operation of one frequency.The pressure that system can be born is refrigerant in the corresponding saturation pressure of 70 DEG C or so temperature.Due to being that fixed frequency is controlled
System, there are many defects for system.For example, drying needs the operation of compressor high frequency to accelerate to heat up early period, invariable frequency compressor frequency
It is single, it is unable to satisfy this demand, so early period, heat cycles wind took a long time to target temperature.The later period is dried with the liter of temperature
Height, system tend towards stability, and condensation temperature is close to limiting value, and compressor still high frequency is run at this time, and temperature, power persistently rise,
Cooling capacity and heat waste are caused, inlet air temperature is unable to stability contorting；Heat pump system needs off-load, and fixed-frequency control cannot achieve this
Control, although some drying system designs have the off-loads accessory such as auxiliary condenser and accessory fan for after the drying at present
Phase system unloaded, but it has been consequently increased complexity, energy consumption and the cost of system design and control.
Existing method for controlling frequency conversion such as CN103882665A, CN102105631A, compressor frequency modulation is mostly in certain regulations
It is foundation that frequency values operation certain time, evaporator/condenser/delivery temperature, which reach certain temperature value, and whole control flow is multiple
Miscellaneous, frequency controls not smart enoughization, and temperature control is not accurate enough, fluctuation is big.
Summary of the invention
It is washed it is an object of the present invention to provide a kind of heat pump and dries control method, system and device, additional off-load can not be increased
Accessory guarantees that drying course is stablized, and shortens drying time, reduces whole energy consumption, simple easily to realize.
Specifically, the present invention adopts the following technical solutions realize.
On the one hand, the present invention provides a kind of heat pump and washes baking control method, comprising:
Beforehand control is dried, suitable compressor original frequency is matched according to air outlet real time temperature and is heated up；
Later period control is dried, after air inlet real time temperature reaches air inlet target temperature, compressor is according to the air inlet
Mouth target temperature adjusts frequency in real time, keeps air inlet real time temperature close to air inlet target temperature.
Furthermore, the drying beforehand control includes:
Detection air port real time temperature；
Compressor is run with original frequency corresponding with the air outlet real time temperature；
Whether detection air inlet real time temperature is higher than air inlet target temperature, if being not higher than air inlet target temperature,
Judgement be oven-dried whether article has been done, if it is judged that be it is yes, then compressor stopping, if it is judged that be it is no, then compress
Machine continues with original frequency operation；If being higher than air inlet target temperature, drying beforehand control terminates, into the baking
Dry later period control.
Furthermore, the compressor before original frequency corresponding with air outlet real time temperature operation also to wrap
Compressor is included to run with the first original frequency；The original frequency is greater than first original frequency.
Furthermore, the drying later period, which controls, includes:
Calculate the difference of air inlet real time temperature and air inlet target temperature；
Compressor frequency regulated value is determined according to the difference；
The frequency for adjusting compressor is the sum of current frequency and the compressor frequency regulated value；
Judgement is oven-dried whether article has been done, if it is judged that being yes, then compressor stopping, if it is judged that being
It is no, then it is transferred to the difference for calculating air inlet real time temperature and air inlet target temperature.
Furthermore, the drying later period, which controls, further includes and the calculating air inlet real time temperature and air inlet target
Simultaneously, compressor frequency reduces or increases specified numerical value to the difference operation of temperature.
Furthermore, the specified numerical value is 5~10 hertz.
Furthermore, to be specified before being transferred to the difference for calculating air inlet real time temperature and air inlet target temperature etc.
Duration.
Furthermore, the drying later period, which controls, includes:
Compressor is run with first frequency；
Compressor is run with second frequency；
Judge whether air inlet real time temperature is higher than the second target temperature of air inlet, if so, the compressor is with second
Frequency operation, is transferred to second after the designated time and sentences dry process, if it is not, being then transferred to first sentences dry process；
First sentences dry process: judgement is oven-dried whether article has been done, if it is judged that being yes, then compressor stopping, such as
Fruit judging result be it is no, then be transferred to the compressor and run with first frequency；
Second sentences dry process: judgement is oven-dried whether article has been done, if it is judged that being yes, then compressor stopping, such as
Fruit judging result be it is no, then be transferred to the compressor and run with second frequency.
Another aspect, the present invention provide a kind of heat pump and wash baking control system, realize that above-mentioned heat pump washes baking control method, wrap
It includes:
Temperature collecting module, for acquiring air inlet real time temperature and air outlet real time temperature；
Display module, the information washed during drying control method for showing above-mentioned heat pump, and receive in human-computer interaction
The control instruction of input；
Control module, for receiving the data information of the temperature collecting module and/or the instruction letter of the display module
It ceases and is calculated, send drive module for control command, the information that above-mentioned heat pump is washed during drying control method is sent
To display module；
Drive module is dried motor, compressor and/or blower in device and is run according to control instruction for driving heat pump to wash.
In another aspect, the present invention also provides a kind of heat pumps to wash baking device, the heat pump is washed baking device and is washed using above-mentioned heat pump
Dry control method.
Beneficial effects of the present invention are as follows: heat pump of the invention, which is washed, dries control method, system and device, is compressed using frequency conversion
Machine control；Stage phase before baking can match suitable compressor original frequency heating fortune according to the environmental working condition in roller
Row, to shorten circulated air heating-up time early period；Later period drying stage, after circulated air is heated to target temperature, compressor can root
The real-time frequency modulation operation of target temperature accordingly, had not only guaranteed the cool-down dehumidification effect of evaporator, but also can reach needed for condenser heating
Thermic load, but also roller circulation air inlet real time temperature is able to maintain close to air inlet target temperature, even if there is fluctuation up and down
Very little, entire drying course run smoothly；Early period heating and the later period stablize drying course be able to achieve enabling objective control parameter and
Temperature and humidity parameter, mass-and heat-transfer, product power consumption perfect matching, the easy to accomplish and effect of drying course compressor variable frequency control is aobvious
It writes；Heat pump system does not need to increase additional off-load accessory, and compressor variable frequency controls the defect for overcoming fixed-frequency control, compared to existing
The some method for controlling frequency conversion having simply easily are realized, in terms of drying course stability, shortening drying time, reducing whole energy consumption
There is greater advantage.
Detailed description of the invention
Fig. 1 is that the heat pump of the embodiment of the present invention washes baking apparatus structure schematic diagram.
Fig. 2 is that the heat pump of the embodiment of the present invention washes baking control method overall flow figure.
Fig. 3 is that the heat pump of the embodiment of the present invention washes baking control method drying model process figure.
Fig. 4 is that the heat pump of the embodiment of the present invention 1 washes baking control method compressor variable frequency control flow chart.
Fig. 5 is that the heat pump of the embodiment of the present invention 1 washes baking control system composition schematic diagram.
Fig. 6 is that the heat pump of the embodiment of the present invention 2 washes baking control method compressor variable frequency control flow chart.
Label in figure: 1- cylinder, 2- circulation air path, 3- air inlet, 4- air outlet, 5- blower, 6- drip tray, 7- condensation
Water pipe, 8- compressor, 9- condenser, 10- throttling set, 11- evaporator.
Specific embodiment
Below with reference to embodiment and referring to attached drawing, present invention is further described in detail.
Embodiment 1:
One embodiment of the present of invention washes for a kind of heat pump and dries control method, system and device.
As shown in Figure 1, heat pump of the invention washes baking device, including cylinder 1, ducting system and heat pump system and other portions
Part.Ducting system includes the circulation air path 2 and blower 5 being connected with cylinder.Heat pump system includes being of coupled connections with circulation air path
Compressor 8, condenser 9, throttling set 10 and evaporator 11.Other component includes the pipeline knot for connecting each component in heat pump system
Structure.Circulated air successively passes through heat pump system, air inlet 3, cylinder 1, air outlet 4, finally arrives heat pump system again, is thusly-formed one
Opposite sealing and circulating wind path, circulating air duct are of coupled connections with heat pump system.
Clothes drying process implements process are as follows: under the driving of blower 5, air outlet 3 row of the damp-heat air from cylinder 1
Out.It first passes through evaporator 11 and damp-heat air is cooled to cold dry air, condensed water is precipitated and realizes that cool-down dehumidification, condensed water drop down onto
In the drip tray 6 of 11 device bottom of evaporator, it is discharged by gravity by condensate pipe 7.Then cold dry air passes through condenser 9
Heating becomes heated dry air, is blown in cylinder 1 by blower 5 from the air inlet 3 of cylinder 1, conducts heat with wet wash contact mass transfer, band
The moisture walked in wet wash forms damp-heat air, flows out by the suction of blower 5, then from the air outlet 4 being connected with cylinder 1, warp
11 cool-down dehumidification of evaporator.Circulation reaches dehumidifying drying purpose repeatedly.
As shown in Fig. 2, heat pump wash dry device integrally wash dry process include first wash dry again wash mould drying formula and only execute
Drying mode.Drying work process under both of which is identical, comprising: drying mode starting；Motor, blower starting；Compressor
Conversion process；Drying control process terminates, and compressor, motor, blower are successively out of service in order, as shown in Figure 3.
Definition is following to dry control parameter:
TOutlet air: air outlet real time temperature is the temperature value of temperature sensor real-time detection at air outlet 4 in Fig. 1；
TAir inlet: air inlet real time temperature is the temperature value of temperature sensor real-time detection at air inlet 3 in Fig. 1；
Th0: air inlet target temperature generally recommends T according to baked strength and required temperatureh0Be set in 45 to 80 DEG C it
Between；
Δ T: air inlet real time temperature TAir inletWith air inlet target temperature Th0Difference, the value of Δ T is warm in real time according to air inlet
Spend TAir inletControl precision size determine that Δ T is closer to 0 DEG C of then air inlet real time temperature TAir inletFluctuation it is smaller, with air inlet
Target temperature Th0It is closer；
f01: the first original frequency of compressor；
f0: compressor original frequency, value and air outlet real-time detection temperature TOutlet airIt is corresponding, f0>f01；
Δ f: compressor frequency modulation value；
fi-1: compressor last moment frequency；
fi: compressor current frequency, fi=fi-1+Δf。
The running frequency of compressor must not be advised according to system capability and drying control method real-time monitoring beyond compressor
The frequency traffic coverage that lattice book limits.
According to different testing results, Δ T value may for positive value, zero or negative value or the range of Δ T respectively Δ T≤-
A ,-a<Δ T<a, the section Δ T>=a, the then correspondingly, value of Δ f is respectively negative value, zero, positive value.The value of a is warm in real time by air inlet
Spend TAir inletWith air inlet target temperature Th0Between deviation precision determine, the value of a is smaller, air inlet real time temperature TAir inletWith air inlet
Target temperature Th0It is closer.The value of a is preferably between 0 DEG C to 2 DEG C.The value of Δ f is specifically by the performance configuration of heat pump system, reaction
The combined factors such as intake air temperature variation speed determine in ability, operational process, it is preferable that control is within ± 10Hz, to protect
Demonstrate,prove drying temperature stability, accuracy, system run all right.
As shown in figure 4, after drying mode starting, into drying beforehand control.Drying beforehand control includes: air outlet temperature
Sensor detection air port real time temperature TOutlet air(101), compressor is first with the first original frequency f01It runs specified time t (1021),
Then compressor is according to TOutlet airWith corresponding original frequency f0Starting operation (1022) detects air inlet real time temperature TAir inletIt is whether big
In equal to air inlet target temperature Th0(104), it if result is no (N), is performed simultaneously and sentences dry process (105), if sentenced dry
Processes result is is (Y), then compressor stops (106), if sentencing dry processes result is no (N), compressor continues with initial
Frequency f0It runs (102)；If it is (Y) that 104 result, which is, enter the control of drying later period.The control of drying later period includes: to calculate
Air inlet real time temperature TAir inletWith air inlet target temperature Th0Difference DELTA T (107), compressor frequency modulation value is determined according to the value of Δ T
Δ f (108) executes compressor real time execution frequency fi=fi-1After+Δ f (109), dry process (110) are sentenced in execution, if sentenced dry
Processes result is is (Y), then compressor stops (111), if sentencing dry processes result is no (N), thens follow the steps 107, so
Circulation, terminates compressor variable frequency control until sentencing to finish becoming a useful person.
1021 compressor of setting steps initially allows for compressor with lower frequency operation a period of time t and just starts rank
Section problem of oil return and system tentatively preheat guarantee stable operation, the step for cancel to system drying run also have substantially no effect on.
It, can be in step 104 knot to guarantee that fluctuation deviation is not too large between inlet air temperature and target temperature under some cases
Fruit is TAir inletReach Th0Afterwards, the frequency of compressor reduces or increases at once 5Hz to 10Hz, and step 107 synchronizes progress.
Sentence and does this control flow according to heat pump system ability, design requirement difference and sentence dry accuracy guarantee, setting pressure
Certain time or inlet air temperature T after the operation of contracting machineAir inletJust start when reaching a certain value of target inlet air temperature value or less；
After step 109 compressor frequency modulation, step 107 is executed if need to recycle, it need to be according to heat pump system respond, air inlet
Mouth real time temperature TAir inlet, air outlet real time temperature TOutlet airChange the difference of speed after certain runing time, just circulation executes
Step 107.This runing time is preferably set between 0.5min to 2min or changes tune on demand according to system response ability
Whole, system has sufficient time operation feedback after guaranteeing compressor frequency modulation with this, avoids compressor advanced or lag frequency modulation.
As shown in figure 5, heat pump wash dry control system include:
Temperature collecting module, for acquiring intake air temperature and air outlet temperature；
Display module, the information washed during drying control method for showing above-mentioned heat pump, and receive in human-computer interaction
The control instruction of input；
Control module, for receiving the data information of the temperature collecting module and/or the instruction letter of the display module
It ceases and is calculated, send drive module for control command, the information that above-mentioned heat pump is washed during drying control method is sent
To display module；
Drive module is dried motor, compressor and/or blower in device and is run according to control instruction for driving heat pump to wash.
Heretofore described drying control method is equally applicable to other heat pumps in addition to applying to clothing heat pump drying device
Drying unit.
Embodiment 2:
Fig. 6 is the second embodiment of compressor variable frequency drying control method.Wherein, drying early period before step 206
Control (step 201~205) is consistent with drying beforehand control (step 101~106) in Fig. 4 of embodiment 1.The present embodiment
In, if TAir inlet≥Th0(203), then enter the control of drying later period.Drying later period control includes: compressor with first frequency f1Fortune
Row a period of time；Judge whether TAir inlet≥Th1(step 207) executes first and sentences if the implementing result of step 207 is no (N)
Dry process (208), if the implementing result that first sentences dry process (208) be (Y) if compressor stop (209), if first
The implementing result for sentencing dry process (208) is that no (N) then recycles execution step 206；If it is (Y) that the implementing result of step 207, which is,
Then compressor is with second frequency f2Operation a period of time (210) executes second and sentences dry process (211), if second sentences dry process
(211) implementing result is is (Y), then compressor stops (212), if the second implementing result for sentencing dry process (211) is no
(N) it then recycles and executes step 210.
Wherein, following parameter is defined:
TOutlet air: air outlet real time temperature is the temperature value of temperature sensor real-time detection at air outlet 4 in Fig. 1；
TAir inlet: air inlet real time temperature is the temperature value of temperature sensor real-time detection at air inlet 3 in Fig. 1；
Th0: air inlet target temperature generally recommends T according to baked strength and required temperatureh0Be set in 45 to 80 DEG C it
Between；
Th1: the first temperature of air inlet generally recommends T according to baked strength and required temperatureh1Be set in 45 to 80 DEG C it
Between, Th1>Th0, recommend control within 5 DEG C；
f01: the first original frequency of compressor；
f0: compressor original frequency, value and air outlet real-time detection temperature TOutlet airIt is corresponding, f0>f01；
f1: compressor first frequency；
f2: compressor second frequency, f0>f1>f2。
The running frequency of compressor must not be advised according to system capability and drying control method real-time monitoring beyond compressor
The frequency traffic coverage that lattice book limits.
Although the present invention has been described by way of example and in terms of the preferred embodiments, embodiment is not for the purpose of limiting the invention.Not
It is detached from the spirit and scope of the present invention, any equivalent change or retouch done also belongs to the protection scope of the present invention.Cause
This protection scope of the present invention should be based on the content defined in the claims of this application.
Claims (10)
1. a kind of heat pump washes baking control method characterized by comprising
Beforehand control is dried, suitable compressor original frequency is matched according to air outlet real time temperature and is heated up；
Later period control is dried, after air inlet real time temperature reaches air inlet target temperature, compressor is according to the air inlet mesh
Mark temperature adjusts frequency in real time, keeps air inlet real time temperature close to air inlet target temperature.
2. heat pump as described in claim 1 washes baking control method, which is characterized in that the drying beforehand control includes:
Detection air port real time temperature；
Compressor is run with original frequency corresponding with the air outlet real time temperature；
Whether detection air inlet real time temperature is higher than air inlet target temperature, if being not higher than air inlet target temperature, judges
Be oven-dried whether article has been done, if it is judged that be it is yes, then compressor stop, if it is judged that be it is no, then compressor after
It is continuous to be run with the original frequency；If being higher than air inlet target temperature, drying beforehand control terminates, into after the drying
Phase control.
3. heat pump as claimed in claim 2 washes baking control method, which is characterized in that the compressor with the outlet air cause for gossip
It further include that compressor is run with the first original frequency before the corresponding original frequency operation of Shi Wendu；The original frequency is greater than institute
State the first original frequency.
4. heat pump as described in claim 1 washes baking control method, which is characterized in that the drying later period, which controls, includes:
Calculate the difference of air inlet real time temperature and air inlet target temperature；
Compressor frequency regulated value is determined according to the difference；
The frequency for adjusting compressor is the sum of current frequency and the compressor frequency regulated value；
Judgement be oven-dried whether article has been done, if it is judged that be it is yes, then compressor stopping, if it is judged that be it is no, then
It is transferred to the difference for calculating air inlet real time temperature and air inlet target temperature.
5. heat pump as claimed in claim 4 washes baking control method, which is characterized in that drying later period control further includes and institute
It states and calculates the difference operation of air inlet real time temperature and air inlet target temperature simultaneously, compressor frequency reduces or increase specified number
Value.
6. heat pump as claimed in claim 5 washes baking control method, which is characterized in that the specified numerical value is 5~10 hertz.
7. heat pump as claimed in claim 4 washes baking control method, which is characterized in that be transferred to calculate air inlet real time temperature with into
The duration to be specified such as before the difference of air port target temperature.
8. heat pump as described in claim 1 washes baking control method, which is characterized in that the drying later period, which controls, includes:
Compressor is run with first frequency；
Compressor is run with second frequency；
Judge whether air inlet real time temperature is higher than the second target temperature of air inlet, if so, the compressor is with second frequency
Operation is transferred to second after the designated time and sentences dry process, if it is not, being then transferred to first sentences dry process；
First sentences dry process: judgement is oven-dried whether article has been done, if it is judged that being yes, then compressor stopping, if sentenced
Disconnected result be it is no, then be transferred to the compressor and run with first frequency；
Second sentences dry process: judgement is oven-dried whether article has been done, if it is judged that being yes, then compressor stopping, if sentenced
Disconnected result be it is no, then be transferred to the compressor and run with second frequency.
9. a kind of heat pump washes baking control system, realize that the heat pump as described in claim 1~8 washes baking control method, feature exists
In, comprising:
Temperature collecting module, for acquiring air inlet real time temperature and air outlet real time temperature；
Display module, for showing that heat pump described in claim 1~8 washes information and recipient during drying control method
The control instruction inputted in machine interaction；
Control module, for receive the temperature collecting module data information and/or the display module command information simultaneously
It is calculated, sends drive module for control command, heat pump described in the claim 1~8 is washed and dries control method mistake
Information in journey is sent to display module；
Drive module is dried motor, compressor and/or blower in device and is run according to control instruction for driving heat pump to wash.
10. a kind of heat pump washes baking device, which is characterized in that the heat pump, which is washed, dries device using the heat pump as described in power 1~8 is any
Wash baking control method.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811189282.9A CN109440418B (en) | 2018-10-12 | 2018-10-12 | Heat pump washing and drying control method, system and device |
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|---|---|---|---|
| CN201811189282.9A CN109440418B (en) | 2018-10-12 | 2018-10-12 | Heat pump washing and drying control method, system and device |
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| CN111207570A (en) * | 2020-03-31 | 2020-05-29 | 郑州轻工业大学 | Energy-saving heat pump drying system and control method thereof |
| CN114687188A (en) * | 2020-12-30 | 2022-07-01 | 无锡小天鹅电器有限公司 | Drying control method, device, equipment and computer readable storage medium |
| CN115523748A (en) * | 2022-08-09 | 2022-12-27 | 青岛海尔空调器有限总公司 | Heat pump dryer control method and device based on return air inlet temperature |
| CN115523750A (en) * | 2022-08-09 | 2022-12-27 | 青岛海尔空调器有限总公司 | Heat pump dryer control method and device based on air inlet temperature |
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| CN114687188A (en) * | 2020-12-30 | 2022-07-01 | 无锡小天鹅电器有限公司 | Drying control method, device, equipment and computer readable storage medium |
| CN114687188B (en) * | 2020-12-30 | 2023-11-24 | 无锡小天鹅电器有限公司 | Drying control method, device, equipment and computer readable storage medium |
| CN115523748A (en) * | 2022-08-09 | 2022-12-27 | 青岛海尔空调器有限总公司 | Heat pump dryer control method and device based on return air inlet temperature |
| CN115523750A (en) * | 2022-08-09 | 2022-12-27 | 青岛海尔空调器有限总公司 | Heat pump dryer control method and device based on air inlet temperature |
| CN115523748B (en) * | 2022-08-09 | 2023-12-19 | 青岛海尔空调器有限总公司 | Control method and device for heat pump dryer based on return air inlet temperature |
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