CN110424135B - Drying equipment, control method and control device thereof - Google Patents
Drying equipment, control method and control device thereof Download PDFInfo
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- CN110424135B CN110424135B CN201910646322.6A CN201910646322A CN110424135B CN 110424135 B CN110424135 B CN 110424135B CN 201910646322 A CN201910646322 A CN 201910646322A CN 110424135 B CN110424135 B CN 110424135B
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- 238000001035 drying Methods 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 abstract description 8
- 230000001276 controlling effect Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Control Of Washing Machine And Dryer (AREA)
Abstract
The embodiment of the invention discloses a drying device, a control method and a control device thereof, wherein the drying device comprises a humidity sensor and a fan, and the control method comprises the following steps: detecting whether a load humidity signal acquired by a humidity sensor is received within a first set time length; and if the load humidity signal is not received within the first set time length, controlling to increase the current first rotating speed of the fan to the second rotating speed. In the embodiment of the invention, when the control device does not receive the load humidity signal acquired by the humidity sensor, the load in the drying equipment can be accelerated by adjusting the rotating speed of the fan so as to be contacted with the humidity sensor, and then the humidity sensor can acquire the humidity information of the load, the control device can judge the drying state of the load according to the load humidity information and control the drying time according to the drying state of the load, thereby solving the problem that the drying effect is not ideal due to the fact that the clothes are less and the machine is stopped after the drying is stopped for a fixed time.
Description
Technical Field
The embodiment of the invention relates to a drying technology, in particular to drying equipment, a control method and a control device thereof.
Background
The clothes dryer is a cleaning type home appliance that instantly evaporates and dries moisture in washed laundry using electric heating. It is especially needed for the winter in north and the difficult-to-dry condition of the 'Hui nan Tian' clothes in south. In addition, the clothes dryer is largely used in industrial production for drying fabrics, thereby improving production efficiency.
Currently, when a user uses a dryer, after selecting a corresponding automatic program, the dryer operates and performs automatic drying. When clothes in the clothes dryer are relatively small, the condition that the load is not contacted with the humidity sensor can occur, at the moment, the clothes dryer can consider that no load exists in the machine, and the condition that the clothes dryer is stopped or stopped after drying for a fixed time can occur according to program setting, so that the clothes drying effect is not ideal, and the user experience is affected.
Disclosure of Invention
The embodiment of the invention provides drying equipment, a control method and a control device thereof, which are used for solving the problem that the drying effect is not ideal due to shutdown or shutdown after drying for a fixed time.
The embodiment of the invention provides a control method of drying equipment, which comprises a humidity sensor and a fan, and comprises the following steps:
detecting whether a load humidity signal acquired by the humidity sensor is received within a first set time length;
and if the load humidity signal is not received within the first set time length, controlling to increase the current first rotating speed of the fan to a second rotating speed.
Further, after the current first rotating speed of the fan is controlled to be increased to be the second rotating speed, the method further comprises the following steps:
continuously detecting whether the load humidity signal is received within a second set time length;
if yes, controlling to adjust the fan to the first rotating speed, and if not, controlling the fan to stop running.
Further, the first set time length is equal to the second set time length.
Further, the method further comprises the following steps:
if the load humidity signal is received within the first set time length, determining a load humidity value according to the load humidity signal;
and when the load humidity value is detected to be smaller than or equal to a load humidity threshold value, controlling the fan to stop running.
Based on the same inventive concept, the embodiment of the invention also provides a control device of a drying device, wherein the drying device comprises a humidity sensor and a fan, and the control device comprises:
the signal detection module is used for detecting whether the load humidity signal acquired by the humidity sensor is received within a first set time length;
and the rotating speed adjusting module is used for controlling the current first rotating speed of the fan to be increased to the second rotating speed if the load humidity signal is not received within the first set time length.
Further, the signal detection module is further configured to continuously detect whether the load humidity signal is received within a second set time period when the fan is at the second rotation speed;
the rotating speed adjusting module is also used for controlling the fan to be adjusted to the first rotating speed when the load humidity signal is received, or controlling the fan to stop running when the load humidity signal is not received.
Further, the first set time length is equal to the second set time length.
Further, the signal detection module is further configured to determine a load humidity value according to the load humidity signal received within the first set time period, and trigger the rotation speed adjustment module to enable the rotation speed adjustment module to control the fan to stop running when the load humidity value is detected to be less than or equal to a load humidity threshold.
Based on the same inventive concept, the embodiment of the invention also provides drying equipment, which comprises a humidity sensor, a fan and the control device.
Further, the humidity sensor is arranged on the flow path of the air flow output by the fan.
In the embodiment of the invention, whether the load humidity signal acquired by the humidity sensor is received within the first set time length is detected, and if the load humidity signal is not received within the first set time length, the current first rotating speed of the fan is controlled to be increased to the second rotating speed. In the embodiment of the invention, when the control device does not receive the load humidity signal acquired by the humidity sensor, the load in the drying equipment can be accelerated by adjusting the rotating speed of the fan so as to be contacted with the humidity sensor, and then the humidity sensor can acquire the humidity information of the load, the control device can judge the drying state of the load according to the load humidity information and control the drying time according to the drying state of the load, thereby solving the problem that the drying effect is not ideal due to the fact that the clothes are less and the machine is stopped after the drying is stopped for a fixed time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a control method of a drying apparatus according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method of a drying apparatus according to an embodiment of the present invention;
fig. 3 is a schematic view of a control device of a drying apparatus according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a drying apparatus according to an embodiment of the present invention.
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 by means of implementation examples with reference to the accompanying drawings in the embodiments of the present invention, 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.
Referring to fig. 1, a flowchart of a control method of a drying apparatus according to an embodiment of the present invention is shown. The drying device provided in this embodiment may be a device integrated with a drying function, such as a dryer or a washing and drying integrated washing machine, and optionally the drying device includes a humidity sensor and a blower, where the humidity sensor may be used to detect the humidity of a load (such as laundry to be dried in the dryer) in the drying device, and the blower is used to provide a drying air flow to circulate air in the drying device.
The control method of the drying equipment provided by the embodiment comprises the following steps:
and step 110, detecting whether a load humidity signal acquired by the humidity sensor is received within a first set time length.
The load humidity signal is a humidity signal of the load acquired by the humidity sensor and comprises parameters such as a humidity value of the load. Specifically, taking a clothes dryer as an example, clothes to be dried in the clothes dryer is the load of the clothes dryer, and when the clothes in the clothes dryer contact the humidity sensor in the drying process, the humidity sensor can acquire a humidity signal of the clothes, namely a load humidity signal. It can be understood that when the load contacts the humidity sensor, the humidity sensor acquires a load humidity signal and transmits the load humidity signal to the control device; when the load is not contacted with the humidity sensor, the humidity sensor also has a signal output, but the signal is obviously different from the humidity signal of the load, and the humidity value and other parameters of the load are not included in the signal.
In this embodiment, after the drying equipment is powered on and operates normally, the control device can detect in real time whether the load humidity signal acquired by the humidity sensor is received. Specifically, the control device receives the signal transmitted by the humidity sensor in real time and detects whether the signal is a load humidity signal, if the control device detects that the signal transmitted by the humidity sensor contains a load humidity value, the control device determines that the signal is the load humidity signal, otherwise, the control device determines that the signal is an invalid signal. The control device only judges that the load humidity signal acquired by the humidity sensor is received when the signal containing the humidity value is received. Based on this, the control device detects whether the load humidity signal acquired by the humidity sensor is received within the first set time period.
It will be appreciated that the load is not constant in the drying apparatus, and thus if the humidity sensor outputs no load humidity signal for a long time, this can be used as a factor in determining whether there is a load in the drying apparatus. The control device judges the load condition in the clothes dryer according to whether the load humidity signal is received within the first set time length. The first set time length is a time length calculated from the time when the last load humidity signal is received, and if the drying apparatus is just powered on, the first set time length is a time length calculated from the time when the drying apparatus is normally operated.
It can be understood that the first set time is too long, which may cause long idle time of the drying device and waste resources; the first set time period is too short, which may result in frequent adjustment of the wind speed of the blower, affecting the life of the drying apparatus. Based on this, the relevant practitioner can reasonably set the first set time length, for example, the first set time length is 3 minutes, but is not limited thereto.
And 120, if the load humidity signal is not received within the first set time period, controlling to increase the current first rotating speed of the fan to the second rotating speed.
In this embodiment, if the control device does not receive the load humidity signal within the first set time period, there may be a case where there is no load in the drying apparatus, or there may be a case where there is too little load to effectively contact the humidity sensor. Based on this, in order to accurately judge the load state, the control device in this embodiment controls the fan to accelerate first, and the fan accelerates to enable the load in the drying equipment with the load to move so that the load can contact the humidity sensor, thereby realizing accurate judgment of the load state. The control device can control the drying time according to the load state, so that the drying time is short when the clothes are fewer, and the drying time can be increased when the clothes are more so as to dry the clothes, and the drying effect is improved.
It is understood that the second rotational speed is greater than the first rotational speed and the second rotational speed is less than the maximum rotational speed of the blower. The relevant practitioner can reasonably set the second rotating speed, for example, the second rotating speed is n times of the first rotating speed, and n is more than 1 and less than 2. The control device can reasonably adjust the fan according to the current rotating speed of the fan, and the excessive or insufficient increment amplitude of the rotating speed is avoided.
In addition, in the prior art, when the load is less, the condition that the load is not collided with the humidity sensor easily appears, and the clothes dryer can consider that no load exists in the machine at this moment, and the condition that the machine is stopped or the machine is stopped after the fixed time of drying can appear according to the setting of procedure, so that the clothes drying effect is not ideal, and the user experience is influenced. In this embodiment, under the condition that the load humidity information is not received, the contact probability of the load and the humidity sensor is improved by adjusting the rotating speed of the fan, so that the problem that the clothes dryer cannot detect the load due to a small amount of clothes and the drying effect is poor is avoided.
In this embodiment, whether the load humidity signal acquired by the humidity sensor is received within the first set time length is detected, and if the load humidity signal is not received within the first set time length, the current first rotation speed of the fan is controlled to be increased to the second rotation speed. In this embodiment, when the control device does not receive the load humidity signal that the humidity sensor gathered, the rotational speed that can make the load in the drying equipment through adjusting the fan accelerates the motion so that the load can contact humidity sensor, and then humidity sensor can gather the humidity information of load, and control device can judge the stoving state of load according to load humidity information to control stoving duration according to the stoving state of load, solved the clothing less and shut down the problem that is not dried or stoving effect is not ideal.
Referring to fig. 2, a schematic diagram of a control method of a drying apparatus according to an embodiment of the present invention is shown. The control method in this embodiment includes:
and step 110, detecting whether a load humidity signal acquired by the humidity sensor is received within a first set time length.
And 120, if the load humidity signal is not received within the first set time period, controlling to increase the current first rotating speed of the fan to the second rotating speed.
Optionally, after the operation of increasing the current first rotational speed of the fan to the second rotational speed, the control in step 120 further includes: step 130, continuing to detect whether the load humidity signal is received within the second set time period.
In this embodiment, after the control device controls to increase the current first rotation speed of the fan to the second rotation speed, if a load exists in the drying device, the fan is accelerated to make the load in the drying device move in an accelerating manner so as to make the load contact with the humidity sensor, and the humidity sensor can acquire and output the load humidity information, so that the control device accurately determines the drying state of the load according to the load humidity information. If no load exists in the drying equipment, the humidity sensor still cannot acquire the parameter information such as the load humidity value after the fan is accelerated, so that the re-detection of the parameter information such as the load humidity value after the fan is accelerated can be used for judging whether the load exists in the drying equipment.
In this embodiment, the first set time period is optionally equal to the second set time period, for example, 3 minutes. It can be appreciated that the excessively long set time may result in long idle time of the drying apparatus, which affects the service life of the drying apparatus.
And 141, if yes, controlling to adjust the fan to a first rotating speed. Specifically, if the load humidity signal is detected to be received within the second set time length, the load exists in the drying equipment, and at the moment, the control device can reduce the rotating speed of the fan, so that the energy consumption is reduced; meanwhile, the control device judges the drying state of the load according to the load humidity signal acquired by the humidity sensor.
And 142, if not, controlling the fan to stop running. Specifically, after the rotation speed of the fan is increased, if the condition that the load humidity signal is not received within the second set time period is detected, the fact that no load exists in the drying equipment can be judged, at the moment, the control device can control the fan to stop running, further control the drying equipment to stop, energy consumption is reduced, and idle running of the drying equipment is avoided.
Optionally, the control method further includes: if the load humidity signal is received within the first set time period, determining a load humidity value according to the load humidity signal; and when the load humidity value is detected to be smaller than or equal to the load humidity threshold value, controlling the fan to stop running. The load humidity threshold is a set parameter related to the load drying state, and is a standard for judging whether drying is performed or not. Specifically, if the load humidity value is lower than the load humidity threshold value, the load can be judged to be dried; if the load humidity value is higher than the load humidity threshold value, the load is determined to be moist and not dried, and the drying needs to be continued.
In this embodiment, whether the load humidity signal is received or not is continuously detected twice, and if the load humidity signal is not received in the first signal detection, the load is accelerated by increasing the wind speed, so that the contact probability between the load and the humidity sensor is increased; and then carrying out the second detection, increasing the contact probability of the load and the humidity sensor by improving the wind speed, and judging that the load does not exist in the drying equipment through the two detections if the control device does not receive the load humidity signal, namely the humidity sensor does not contact the load, wherein the drying equipment needs to be controlled to stop running at the moment, so that the idling of the equipment is avoided. The autonomous detection of the load is realized.
In this embodiment, the control device may acquire the load humidity value according to the load humidity signal as long as it receives the load humidity signal, so as to determine whether the humidity degree of the load is complete or not. Obviously, if the load humidity value is detected to be larger than the load humidity threshold value, the load is determined to be still moist and the drying is required to be continued, and the drying equipment continues to keep running in the current state until the load humidity value is detected to be smaller than or equal to the load humidity threshold value; and when the detected load humidity value is smaller than or equal to the load humidity threshold value, judging that the load is dried, wherein the control device can control the drying equipment to finish running, and the drying program is finished.
It should be noted that, in this embodiment, no matter the drying device is used for drying clothes or no clothes, no timing drying is needed, and as long as the humidity value of the load is detected to be lower than the preset humidity threshold value, the problem of energy waste caused by timing drying can be solved.
When the control device determines that the load exists, the control device can also control the fan to increase the rotating speed at regular or irregular time to operate for a period of time in the whole drying process so as to quickly detect whether the clothes are dried. As soon as laundry drying is detected, the drying process is ended.
In this embodiment, at the initial stage of drying, it is detected whether a load humidity signal collected by the humidity sensor within a first set time period is received, and if not, the fan speed is increased and the fan is operated for a period of time. If the load is still not detected in the period of time of the fan rotation speed increasing operation, judging that no clothes exist in the drying equipment, and controlling the drying equipment to stop heating. If the control device determines that the drying equipment has a load and the load humidity value is greater than the load humidity threshold, it determines that wet clothes exist in the drying equipment, and at this time, the fan rotation speed is reduced to an ideal drying rotation speed and drying is performed, so that the drying power consumption is reduced. Optionally, the control device may intermittently increase the rotation speed of the blower during the drying process to detect whether the laundry is dried, so as to perform the drying process.
Referring to fig. 3, a schematic diagram of a control device of a drying apparatus according to an embodiment of the present invention is shown. The control device provided in this embodiment may execute the control method described in any of the above embodiments, and the control device may be implemented in software and/or hardware and configured to be applied in a drying apparatus. Drying equipment includes humidity transducer and fan, and controlling means includes: the signal detection module 210 is configured to detect whether a load humidity signal acquired by the humidity sensor is received within a first set period of time; the rotation speed adjusting module 220 is configured to control to increase the current first rotation speed of the fan to the second rotation speed if the load humidity signal is not received within the first set time period.
Optionally, the signal detection module 210 is further configured to continuously detect whether the load humidity signal is received within a second set time period when the fan is at the second rotation speed; the rotation speed adjusting module 220 is further configured to control to adjust the fan to the first rotation speed when the load humidity signal is received, or control the fan to stop running when the load humidity signal is not received. Optionally, the first set time length is equal to the second set time length. Optionally, the signal detection module 210 is further configured to determine a load humidity value according to the load humidity signal received within the first set time period, and trigger the rotation speed adjustment module 220 to make the rotation speed adjustment module 220 control the fan to stop running when the load humidity value is detected to be less than or equal to the load humidity threshold.
In this embodiment, whether the load humidity signal acquired by the humidity sensor is received within the first set time length is detected, and if the load humidity signal is not received within the first set time length, the current first rotation speed of the fan is controlled to be increased to the second rotation speed. In this embodiment, when the control device does not receive the load humidity signal that the humidity sensor gathered, the rotational speed that can make the load in the drying equipment through adjusting the fan accelerates the motion so that the load can contact the humidity sensor, and then the humidity information of load can be gathered to the humidity sensor, and control device can judge the stoving state of load according to load humidity information.
Based on the same inventive concept, the embodiment of the present invention as shown in fig. 4 also provides a drying apparatus including a humidity sensor 410, a blower 420, and a control device 430 as described in any of the above embodiments. An optional humidity sensor 410 is disposed in the flow path of the air stream output by the fan 420.
In this embodiment, the optional drying device is a dryer with an independent fan, so that the purpose of fan speed regulation can be independently achieved, and thus the air speed of the drying device (such as the drum of the dryer) in the drying cavity can be actively regulated, and the rotation speed of the independent fan is changed without affecting the rotation speed of the drum.
In this embodiment, after the rotation speed of the fan is increased, the airflow velocity in the drying chamber is increased, so that the probability of contact between the load and the humidity sensor 410 is increased. The optional humidity sensor 410 is disposed on the flow path of the air flow output by the fan 420, and the load may drift toward the humidity sensor along with the flow direction of the air flow, so as to further increase the contact probability between the load and the humidity sensor 410. The optional humidity sensor 410 is provided at a lower portion of an inside of a door of the drying apparatus, and a load such as laundry may touch the humidity sensor during a rolling process, and the control module may determine a drying process to be performed according to a real-time humidity value of the laundry detected by the humidity sensor.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (6)
1. A control method of a drying apparatus, the drying apparatus including a humidity sensor and a blower, the control method comprising:
detecting whether a load humidity signal acquired by the humidity sensor is received within a first set time length;
if the load humidity signal is not received within the first set time length, controlling to increase the current first rotating speed of the fan to a second rotating speed;
after the control increases the current first rotating speed of the fan to the second rotating speed, the control further comprises:
continuously detecting whether the load humidity signal is received within a second set time length;
if yes, controlling to adjust the fan to the first rotating speed, and if not, controlling the fan to stop running;
if the load humidity signal is received within the first set time length, determining a load humidity value according to the load humidity signal;
and when the load humidity value is detected to be smaller than or equal to a load humidity threshold value, controlling the fan to stop running.
2. The control method according to claim 1, characterized in that the first set time length is equal to the second set time length.
3. A control device of a drying apparatus, wherein the drying apparatus includes a humidity sensor and a blower, the control device comprising:
the signal detection module is used for detecting whether the load humidity signal acquired by the humidity sensor is received within a first set time length;
the rotating speed adjusting module is used for controlling the current first rotating speed of the fan to be increased to a second rotating speed if the load humidity signal is not received within the first set time length;
the signal detection module is further used for continuously detecting whether the load humidity signal is received within a second set time length when the fan is at the second rotating speed;
the rotating speed adjusting module is also used for controlling the fan to be adjusted to the first rotating speed when the load humidity signal is received, or controlling the fan to stop running when the load humidity signal is not received;
the signal detection module is further used for determining a load humidity value according to the load humidity signal received in the first set time period, and triggering the rotating speed adjustment module to enable the rotating speed adjustment module to control the fan to stop running when the load humidity value is detected to be smaller than or equal to a load humidity threshold value.
4. A control device according to claim 3, wherein the first set time period is equal to the second set time period.
5. A drying apparatus comprising a humidity sensor, a fan and a control device according to any one of claims 3-4.
6. The drying apparatus according to claim 5, wherein the humidity sensor is disposed on a flow path of the air flow outputted from the blower.
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| CN201910646322.6A CN110424135B (en) | 2019-07-17 | 2019-07-17 | Drying equipment, control method and control device thereof |
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| CN201910646322.6A CN110424135B (en) | 2019-07-17 | 2019-07-17 | Drying equipment, control method and control device thereof |
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| CN110424135B true CN110424135B (en) | 2023-12-01 |
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| CN113897765A (en) * | 2021-11-15 | 2022-01-07 | 木卫智能科技(深圳)有限公司 | Control method of clothes treatment equipment and clothes treatment equipment |
| CN115896959B (en) * | 2022-12-03 | 2024-02-13 | 江苏阿代尔新材料科技有限公司 | Production process of high-elastic polyester regenerated filament yarn |
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| WO2007119969A2 (en) * | 2006-04-14 | 2007-10-25 | Lg Electronics Inc. | Dryer and controlling method thereof |
| JP5974291B2 (en) * | 2012-09-19 | 2016-08-23 | パナソニックＩｐマネジメント株式会社 | Clothes dryer |
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Effective date of registration: 20231026 Address after: No. 40, area D, Sanshui Industrial Park, Foshan, Guangdong 528100 Applicant after: FOSHAN HAIER DRUM WASHING MACHINE Co.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER DRUM WASHING MACHINE Co.,Ltd. Applicant before: Haier Smart Home Co., Ltd. |
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