CN110438778B - Clothes dryer and drying control method thereof - Google Patents
Clothes dryer and drying control method thereof Download PDFInfo
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- CN110438778B CN110438778B CN201810418041.0A CN201810418041A CN110438778B CN 110438778 B CN110438778 B CN 110438778B CN 201810418041 A CN201810418041 A CN 201810418041A CN 110438778 B CN110438778 B CN 110438778B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The application relates to the technical field of clothes dryers, in particular to a clothes dryer and a drying control method thereof. The drying control method comprises the following steps: under the condition that a heat pump system and an auxiliary heating system are started, acquiring the exhaust temperature and the return air temperature of the heat pump system; and controlling the on-off of the auxiliary heating system according to the exhaust temperature and the return air temperature. The drying control method controls the opening and closing of the auxiliary heating system through the exhaust temperature and the return air temperature, so that the phenomenon that the heat pump system exceeds load due to the continuous opening of the auxiliary heating system is effectively prevented on the premise of ensuring the clothes drying efficiency as much as possible, and the exhaust temperature and the return air temperature of the heat pump system are maintained within a set temperature range more accurately so as to ensure that the heat pump system can stably operate at a proper working temperature.
Description
Technical Field
The application relates to the technical field of clothes dryers, in particular to a clothes dryer and a drying control method thereof.
Background
The heat pump clothes dryer becomes an important product in the clothes dryer market with the excellent quality of energy saving. But due to the characteristics of the heat pump system itself, the drying performance of the dryer is to some extent limited by the ambient temperature. If the temperature of the environment where the clothes dryer is located is low, the temperature of the wet clothes itself will be low after the clothes are washed and spin-dried due to the low air temperature and water temperature. In this case, the period during which the dryer dries the laundry becomes long and the drying effect of the dryer is poor, thereby causing a user to wait for too long and a user experience to be poor.
To solve this problem, the conventional heat pump clothes dryer is provided with an auxiliary heating system (e.g., an electric heater), and the heat pump system and the auxiliary heating system are simultaneously activated to increase the temperature rising speed and the temperature of the air entering the drum, thereby achieving rapid drying of the laundry. However, as the auxiliary heating system continues to operate, the temperature of the gas in the air duct gradually increases, and the operating temperature (exhaust temperature, return air temperature, etc.) of the heat pump system also gradually increases until reaching the limit value, which may cause the heat pump system to exceed the load if the auxiliary heating system continues to operate.
Accordingly, there is a need in the art for a new clothes dryer and a drying control method thereof to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the above-mentioned problems in the prior art, that is, the problem that the heat pump system exceeds the load due to the simultaneous opening of the heat pump system and the auxiliary heating system in the existing heat pump clothes dryer, the present application provides a drying control method of the clothes dryer, wherein the clothes dryer comprises the heat pump system and the auxiliary heating system, and the drying control method comprises: under the condition that a heat pump system and an auxiliary heating system are started, acquiring the exhaust temperature and the return air temperature of the heat pump system; and controlling the on-off of the auxiliary heating system according to the exhaust temperature and the return air temperature.
In the above preferred technical solution of the drying control method, the step of controlling the on/off of the auxiliary heating system according to the exhaust temperature and the return air temperature includes: comparing the exhaust temperature and the return air temperature with corresponding preset temperatures, and controlling the on-off of the auxiliary heating system according to a comparison result.
In the above preferred technical solution of the drying control method, the step of comparing the exhaust temperature and the return air temperature with corresponding preset temperatures and controlling the on/off of the auxiliary heating system according to the comparison result includes: and if the exhaust temperature is less than the first preset temperature and the return air temperature is less than the second preset temperature, maintaining the opening state of the auxiliary heating system.
In the above preferred technical solution of the drying control method, the step of comparing the exhaust temperature and the return air temperature with corresponding preset temperatures and controlling the on/off of the auxiliary heating system according to the comparison result includes: and if the exhaust temperature is greater than or equal to the first preset temperature or the return air temperature is greater than or equal to the second preset temperature, the auxiliary heating system is turned off.
In the above preferred technical solution of the drying control method, the step of comparing the exhaust temperature and the return air temperature with corresponding preset temperatures and controlling the on/off of the auxiliary heating system according to the comparison result includes: after the auxiliary heating system is turned off, if the exhaust temperature is greater than or equal to a third preset temperature and the return air temperature is greater than or equal to a fourth preset temperature, maintaining the off state of the auxiliary heating system; wherein the third preset temperature is less than the first preset temperature, and the fourth preset temperature is less than the second preset temperature.
In the above preferred technical solution of the drying control method, the step of comparing the exhaust temperature and the return air temperature with corresponding preset temperatures and controlling the on/off of the auxiliary heating system according to the comparison result includes: after the auxiliary heating system is turned off, if the exhaust temperature is less than the third preset temperature or the return air temperature is less than the fourth preset temperature, the auxiliary heating system is turned back on.
In the above preferred technical solution of the drying control method, the "obtaining the exhaust temperature and the return air temperature of the heat pump system in the case where the heat pump system and the auxiliary heating system are turned on" is determined by: at least two temperatures among an exhaust temperature, a return air temperature, a condenser temperature of the heat pump system, and a temperature in a drum of the clothes dryer are lower than a fifth preset temperature, so that the heat pump system and the auxiliary heating system are turned on.
In the above preferred technical solution of the drying control method, the "obtaining the exhaust temperature and the return air temperature of the heat pump system in the case where the heat pump system and the auxiliary heating system are turned on" is determined by: and after the heat pump system operates for a set time, if the temperature of the rising exhaust temperature is smaller than a sixth preset temperature or the difference between the exhaust temperature and the return air temperature is smaller than a seventh preset temperature, the heat pump system and the auxiliary heating system are started.
In another aspect, the present application also provides a clothes dryer including a controller for executing the drying control method according to any one of the above aspects.
According to the drying control method, under the condition that the heat pump system and the auxiliary heating system are started, the exhaust temperature and the return air temperature of the heat pump system are obtained, and the auxiliary heating system is controlled to be started and stopped according to the exhaust temperature and the return air temperature, so that effective control of the auxiliary heating system is achieved, and specifically, the heat pump system is protected from exceeding load by monitoring the exhaust temperature and the return air temperature in real time. If the exhaust temperature and the return air temperature are close to the corresponding upper limit temperatures, the protection of the heat pump system can be realized by controlling the on-off of the auxiliary heating system, so that the condition that the heat pump system exceeds the load due to the excessive operation of the auxiliary heating system is avoided. And, compared with the mode of controlling the auxiliary heating system by detecting a single temperature, the drying control method of the application can avoid the following situations: if the auxiliary heating system is controlled only according to the exhaust temperature, it is possible that the exhaust temperature is normal but the return air temperature has exceeded the limit value, at which time the dryer does not shut down the auxiliary heating system, and continued operation of the auxiliary heating system may cause the heat pump system to exceed the load and even may cause damage to the machine. It can be seen that the exhaust temperature and the return air temperature are simultaneously used as monitoring targets, so that the working state of the heat pump system can be known more accurately, and the auxiliary heating system can be controlled according to the states.
In the preferred technical scheme of the application, the exhaust temperature and the return air temperature are respectively compared with the first preset temperature and the second preset temperature, and the closing of the auxiliary heating system is controlled according to the comparison result, so that the load of the heat pump system can be reduced by closing the auxiliary heating system before the heat pump system reaches the maximum load, thereby ensuring that the heat pump system is not damaged. Further, the exhaust temperature and the return air temperature are respectively compared with the third preset temperature and the fourth preset temperature, and the auxiliary heating system is controlled to be restarted according to the comparison result, namely, when the exhaust temperature and the return air temperature of the heat pump system are reduced to the corresponding preset temperatures, the operation of the heat pump system is prevented from being influenced by the excessively low temperature, and the auxiliary heating system is restarted at the moment so as to ensure the normal operation of the heat pump system; and the restarting of the auxiliary heating system is also helpful to accelerate the drying rate of the clothes, thereby ensuring the rapid drying of the clothes. It can be seen that, through the above-mentioned setting, can be under the prerequisite of guaranteeing clothing drying efficiency as far as possible, more accurate with heat pump system's exhaust temperature and return air temperature maintain in the settlement temperature range to guarantee that heat pump system's can be under suitable operating temperature steady operation.
In the preferred technical scheme of the application, through setting the condition that the heat pump system and the auxiliary heating system are started simultaneously, the environment condition that the heat pump system and the auxiliary heating system are operated simultaneously can be accurately judged, so that the drying efficiency of clothes is ensured by simultaneously operating the heat pump system and the auxiliary heating system under the condition that the environment temperature is low. That is, the present application adjusts the on state of the auxiliary heating system after determining the "target mode" for allowing the dryer to simultaneously operate the heat pump system and the auxiliary heating system according to the preset condition.
The application also provides a clothes dryer, which comprises a controller for executing the drying control method according to any one of the schemes. It should be noted that, the clothes dryer has all the technical effects of the foregoing drying control method, and will not be described herein.
Drawings
The dryer and the drying control method thereof of the present application will be described with reference to the accompanying drawings. In the accompanying drawings:
fig. 1 is a schematic structural view of a clothes dryer according to an embodiment of the present application;
fig. 2 is a flowchart illustrating a drying control method of a dryer according to an embodiment of the present application.
List of reference numerals:
1. a roller; 2. an air duct; 3. a heat pump system; 31. a condenser; 32. a throttle device; 33. an evaporator; 34. a compressor; 4. an auxiliary heating system; 5. a blower; 6. a temperature sensor.
Detailed Description
Preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present application, and are not intended to limit the scope of the present application. For example, although the steps of the method of the present application are described in a particular order, these orders are not limiting and one skilled in the art may perform the steps in a different order without departing from the basic principles of the application.
Referring to fig. 1, fig. 1 is a schematic structural view of a clothes dryer according to an embodiment of the present application. As shown in fig. 1, the clothes dryer mainly includes a housing, and a drum 1, an air duct 2, a heat pump system 3, and an auxiliary heating system 4 (e.g., an electric heating pipe) disposed in the housing, wherein the heat pump system 3 mainly includes a condenser 31, a throttle device 32, an evaporator 33, and a compressor 34, which are sequentially connected and form a closed loop. The auxiliary heating system 4 is disposed in the air duct 2 of the dryer. A fan 5 is also provided between the condenser 31 and the auxiliary heating system 4, the fan 5 being primarily intended to provide circulating power for the circulation of air in the air duct 2. A temperature sensor 6 is further arranged in the exhaust air duct of the air duct 2, specifically, the temperature sensor 6 is arranged at a position of the exhaust air duct close to the exhaust outlet of the roller 1, and is mainly used for acquiring the temperature of air exhausted from the roller 1. In order to ensure the drying efficiency, a composite heating mode is generally selected under the condition of low ambient temperature, namely, the heating modes of the heat pump system 3 and the auxiliary heating system 4 are simultaneously started so as to shorten the heating time of the dryer, thereby accelerating the drying speed and shortening the drying time.
It should be noted that, the above-mentioned case where the ambient temperature is low includes, but is not limited to:
1) Before the heat pump system 3 and the auxiliary heating system 4 are not turned on, at least two of the exhaust temperature, the return air temperature, the condenser temperature of the heat pump system 3, and the temperature inside the drum 1 are lower than a fifth preset temperature. Illustratively, the fifth preset temperature ranges from 5 ℃ to 10 ℃;
2) After the heat pump system 3 is operated for a set time (e.g., 10 min), the temperature rise of the exhaust gas temperature is smaller than a sixth preset temperature or the difference between the exhaust gas temperature and the return air temperature is smaller than a seventh preset temperature. Illustratively, the sixth preset temperature ranges from 4K to 6K and the seventh preset temperature ranges from 3K to 5K.
In case any of the above conditions is met, i.e. it represents a low ambient temperature, the drying rate may be increased by switching on the heat pump system and the auxiliary heating system in order to increase the drying temperature.
In the case of simultaneously turning on the heat pump system 3 and the auxiliary heating system 4, the gas is heated by the condenser 31 of the heat pump system and then enters the drum 1 after being heated by the auxiliary heating system 4. In this way, the hybrid heating mode can increase the speed of temperature rise and the temperature of the gas entering the drum 1, compared to the mode of heating only by the heat pump system 3, thereby improving the drying effect of laundry and reducing the drying time. However, as the auxiliary heating system 4 continues to operate, the temperature of the gas in the air duct 2 gradually increases, and the operating temperature (exhaust temperature, return air temperature, etc.) of the heat pump system 3 also gradually increases. When the operating temperature of the heat pump system 3 reaches the upper limit temperature, the heat pump system 3 reaches the maximum load, and if the auxiliary heating system 4 is continuously operated, the heat pump system 3 exceeds the maximum load, so that the heat pump system 3 is damaged.
In view of the above problems, the present application provides a drying control method, which will be described below with reference to fig. 2. Fig. 2 is a flowchart illustrating a drying control method of a dryer according to an embodiment of the present application. As shown in fig. 2, the drying control method of the present application includes:
s20: when the above-described condition of low ambient temperature is satisfied, the heat pump system 3 and the auxiliary heating system 4 are simultaneously turned on.
S21: in the case where the heat pump system 3 and the auxiliary heating system 4 are turned on, the exhaust temperature and the return air temperature of the heat pump system 3 are acquired.
S22: it is determined whether the exhaust temperature is less than a first preset temperature and the return air temperature is less than a second preset temperature, and the auxiliary heating system 4 is selectively turned off according to the result.
The first preset temperature is the exhaust upper limit temperature, the second preset temperature is the return air upper limit temperature, and the exhaust temperature and the return air temperature are respectively compared with the corresponding upper limit temperatures, so that the working state of the heat pump system 3 is accurately acquired. Of course, the values of the first preset temperature and the second preset temperature may be set to be lower than the exhaust gas upper limit temperature and the return air upper limit temperature, thereby further enhancing the protection of the heat pump system 3.
Further, in comparison with the case where the auxiliary heating system 4 is controlled by detecting only a single temperature such as the exhaust gas temperature or the return air temperature, there is a possibility that the detected temperature (such as the exhaust gas temperature) is normal, but the other temperature (such as the return air temperature) of the heat pump system has exceeded the limit value, and at this time, continuing to operate the auxiliary heating system 4 causes the heat pump system 3 to exceed the load and thus causes the heat pump system 3 to be damaged. The auxiliary heating system 4 is controlled by monitoring the exhaust gas temperature and the return air temperature simultaneously so as to more accurately know the operating state of the heat pump system 3.
It will be appreciated that in the above-mentioned judging process, the exhaust temperature and the return air temperature are judged simultaneously, and of course, the exhaust temperature and the return air temperature may be judged successively, for example, whether the exhaust temperature is less than the exhaust upper limit temperature may be judged first, and then whether the return air temperature is less than the return air upper limit temperature may be judged selectively according to the comparison result. Specifically, when the exhaust temperature is greater than or equal to the exhaust upper limit temperature, it can be obtained that the heat pump system 3 has reached the highest load, and then the return air temperature does not need to be judged; when the exhaust gas temperature is less than the exhaust gas upper limit temperature, it is further judged whether the return gas temperature is less than the return gas temperature upper limit temperature so as to judge whether the heat pump system 3 reaches the highest load. Those skilled in the art can reasonably adjust the logic sequence for performing the above temperature determination according to actual requirements, so as to adapt to specific applications.
S221: when the exhaust temperature is less than the first preset temperature and the return air temperature is less than the second preset temperature, step S20 is performed, i.e. the on state of the heat pump system 3 and the auxiliary heating system 4 is continuously maintained.
The exhaust temperature is less than the exhaust upper limit temperature and the return air temperature is less than the return air upper limit temperature, which indicates that the heat pump system 3 has not reached the highest load, and the heat pump system 3 and the auxiliary heating system 4 can be continuously operated to achieve rapid drying of clothes.
S222: when the exhaust temperature is equal to or higher than the first preset temperature or the return air temperature is equal to or higher than the second preset temperature, step S23 is executed, i.e. the auxiliary heating system 4 is turned off, and only the heat pump system 3 is operated.
The above step S222 is mainly divided into three cases, i.e. 1) the exhaust temperature is greater than or equal to the exhaust upper limit temperature, and the return air temperature is less than the return air upper limit temperature; 2) The exhaust temperature is smaller than the exhaust upper limit temperature, and the return air temperature is larger than or equal to the return air upper limit temperature; 3) The exhaust temperature is equal to or higher than the exhaust upper limit temperature, and the return air temperature is equal to or higher than the return air upper limit temperature. In either case, if at least one of the exhaust temperature and the return temperature is equal to or higher than the upper limit temperature corresponding thereto, this means that the heat pump system 3 reaches the highest load, and at this time, the auxiliary heating system 4 needs to be turned off in order to reduce the load of the heat pump system 3.
When the auxiliary heating system 4 is turned off, the return air temperature and the exhaust air temperature of the heat pump system 3 will decrease, but when the return air temperature and the exhaust air temperature are lower than the corresponding lower limit temperatures, the heat pump system 3 will not work properly, so that the application preferably also controls the re-opening of the auxiliary heating system 4 by the exhaust air temperature and the return air temperature so as to maintain the working temperature of the heat pump system 3 in the set range, thereby ensuring the normal operation of the heat pump system 3.
Specifically, the drying control method of the present application further comprises:
s24: when the target mode in which both the heat pump system 3 and the auxiliary heating system 4 are on is selected as the initial state, and S23 is executed, that is, the auxiliary heating system 4 is turned off, and only the heat pump system 3 is operated, it is determined whether the exhaust gas temperature is less than the third preset temperature and the return air temperature is less than the fourth preset temperature, and the auxiliary heating system 4 is selectively turned back on according to the result.
The third preset temperature is the exhaust gas lower limit temperature, the fourth preset temperature is the return gas lower limit temperature, and the exhaust gas temperature and the return gas temperature are respectively compared with the exhaust gas lower limit temperature and the return gas lower limit temperature, so that the working state of the heat pump system 3 is accurately acquired. Of course, the values of the third preset temperature and the fourth preset temperature may be set higher than the exhaust gas lower limit temperature and the return gas lower limit temperature, thereby further enhancing the protection of the heat pump system 3.
It will be appreciated that in the above-mentioned judging process, the exhaust temperature and the return air temperature are judged simultaneously, and of course, the exhaust temperature and the return air temperature may be judged successively, for example, whether the return air temperature is smaller than the exhaust temperature lower limit temperature may be judged first, and then whether the exhaust temperature is smaller than the return air lower limit temperature may be judged selectively according to the comparison result. Specifically, when the exhaust temperature is less than the exhaust temperature lower limit temperature, then it is unnecessary to determine the return air temperature; and when the exhaust temperature is greater than or equal to the exhaust temperature upper limit temperature, continuously judging whether the return air temperature is less than the return air temperature upper limit temperature. Those skilled in the art can reasonably adjust the logic sequence for performing the above temperature determination according to actual requirements, so as to adapt to specific applications. Specifically:
s241: when the exhaust temperature is equal to or higher than the third preset temperature and the return air temperature is equal to or higher than the fourth preset temperature, step S23 is performed, that is, the off state of the auxiliary heating system is maintained, and only the heat pump system is operated.
The exhaust temperature is less than the exhaust upper limit temperature and the return air temperature is less than the return air upper limit temperature, namely that the working temperature of the heat pump system is not lower than the lower limit value, the heat pump system is still in a normal working state, and the auxiliary heating system is kept in a closed state.
S242: when the exhaust temperature is less than the third preset temperature or the return air temperature is less than the fourth preset temperature, step S20 is performed, i.e. the auxiliary heating system 4 is turned on again, so that the heat pump system 3 and the auxiliary heating system 4 operate simultaneously.
The above step S242 is mainly divided into three cases, i.e. 1) the exhaust temperature is less than the third preset temperature, and the return air temperature is greater than or equal to the fourth preset temperature; 2) The exhaust temperature is greater than or equal to the third preset temperature, and the return air temperature is less than or equal to the fourth preset temperature; 3) The exhaust temperature is less than the third preset temperature, and the return air temperature is less than the fourth preset temperature. In either case, as long as at least one of the exhaust temperature and the return air temperature is less than the corresponding upper limit temperature, it means that the heat pump system 3 is lower than the operating temperature, and in order to raise the operating temperature of the heat pump system 3 to ensure stable operation of the heat pump system 3, it is necessary to turn on the auxiliary heating system 4 again. In addition, the re-opening of the auxiliary heating system 4 is also helpful to re-heat the air in the air duct 2, so that the temperature of the air entering the roller 1 is increased again, thereby accelerating the drying rate of the clothes and ensuring the quick drying of the clothes.
In summary, the drying control method of the present application can effectively prevent the heat pump system 3 from exceeding the load due to the continuous on of the auxiliary heating system 4 on the premise of ensuring the clothes drying efficiency as much as possible through the above arrangement, and more precisely maintain the exhaust temperature and the return air temperature of the heat pump system 3 within the set temperature ranges to ensure that the heat pump system 3 can stably operate at a proper working temperature.
Thus far, the technical solution of the present application has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will fall within the scope of the present application.
Claims (5)
1. A drying control method of a clothes dryer including a heat pump system and an auxiliary heating system, characterized by comprising:
under the condition that a heat pump system and an auxiliary heating system are started, acquiring the exhaust temperature and the return air temperature of the heat pump system;
comparing the exhaust temperature and the return air temperature with corresponding preset temperatures, and controlling the on-off of the auxiliary heating system according to a comparison result;
wherein, in the condition that the heat pump system and the auxiliary heating system are started, the starting of the heat pump system and the auxiliary heating system in the process of acquiring the exhaust temperature and the return air temperature of the heat pump system is determined by the following conditions:
after the heat pump system runs for a set time, the difference between the exhaust temperature and the return air temperature is smaller than a seventh preset temperature, and if the ambient temperature is lower than the preset ambient temperature, the heat pump system and the auxiliary heating system are started;
the step of comparing the exhaust temperature and the return air temperature with corresponding preset temperatures and controlling the on/off of the auxiliary heating system according to the comparison result comprises the following steps:
and if the exhaust temperature is greater than or equal to a first preset temperature or the return air temperature is greater than or equal to a second preset temperature, closing the auxiliary heating system, and only operating the heat pump system.
2. The drying control method according to claim 1, wherein the step of comparing the exhaust temperature and the return air temperature with the corresponding preset temperatures and controlling the on/off of the auxiliary heating system according to the comparison result further comprises:
and if the exhaust temperature is less than a first preset temperature and the return air temperature is less than a second preset temperature, maintaining the starting state of the heat pump system and the auxiliary heating system.
3. The drying control method according to claim 1, wherein the step of comparing the exhaust temperature and the return air temperature with the corresponding preset temperatures and controlling the on/off of the auxiliary heating system according to the comparison result further comprises:
after the auxiliary heating system is turned off, if the exhaust temperature is greater than or equal to a third preset temperature and the return air temperature is greater than or equal to a fourth preset temperature, maintaining the off state of the auxiliary heating system;
wherein the third preset temperature is less than the first preset temperature, and the fourth preset temperature is less than the second preset temperature.
4. The drying control method according to claim 3, wherein the step of comparing the exhaust temperature and the return air temperature with the corresponding preset temperatures and controlling the on/off of the auxiliary heating system according to the comparison result further comprises:
after the auxiliary heating system is turned off, if the exhaust temperature is less than the third preset temperature or the return air temperature is less than the fourth preset temperature, the auxiliary heating system is turned back on.
5. A clothes dryer, characterized in that it comprises a controller for executing the drying control method according to any one of the preceding claims 1 to 4.
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| CN201810418041.0A CN110438778B (en) | 2018-05-04 | 2018-05-04 | Clothes dryer and drying control method thereof |
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| CN113718500A (en) * | 2020-05-25 | 2021-11-30 | 合肥海尔滚筒洗衣机有限公司 | Control method of heat pump type clothes drying equipment |
| WO2022143147A1 (en) * | 2020-12-30 | 2022-07-07 | 广东美的白色家电技术创新中心有限公司 | Control method and device of laundry treatment apparatus, controller, and laundry treatment apparatus |
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|---|---|
| CN110438778A (en) | 2019-11-12 |
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Effective date of registration: 20230717 Address after: 266101 south of Tuanjie road and west of zonger Road, Huangdao District, Qingdao City, Shandong Province Applicant after: QINGDAO HAIER WASHING ELECTRIC APPLIANCES Co.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER DRUM WASHING MACHINE Co.,Ltd. |
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