CN107245864B - Control method of clothes dryer and clothes dryer - Google Patents
Control method of clothes dryer and clothes dryer Download PDFInfo
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- CN107245864B CN107245864B CN201710325312.3A CN201710325312A CN107245864B CN 107245864 B CN107245864 B CN 107245864B CN 201710325312 A CN201710325312 A CN 201710325312A CN 107245864 B CN107245864 B CN 107245864B
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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
- D06F58/30—Drying processes
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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
- D06F58/20—General details of domestic laundry dryers
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- Detail Structures Of Washing Machines And Dryers (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
The embodiment of the invention provides a clothes dryer and a control method thereof, and belongs to the field of household appliance optimization design. The control method of the clothes dryer comprises the following steps: detecting the humidity in the clothes drying barrel after the clothes dryer is started; and periodically flushing a heat exchanger of the dryer with water until the detected humidity reaches a second preset value when the detected humidity reaches a first preset value. Through the technical scheme, the heat exchanger of the clothes dryer is periodically washed by water in the operation process of the clothes dryer, so that attached burrs on the heat exchanger can be effectively removed, and inconvenience caused by manual cleaning of a filter screen in front of the heat exchanger is eliminated.
Description
Technical Field
The invention relates to household appliance optimization design, in particular to a control method of a clothes dryer and the clothes dryer.
Background
The clothes dryer can quickly evaporate and dry moisture in the wet clothes. The dryer type that can see on the market has direct vent dryer, heat pipe water condensing dryer, heat pipe air condensing dryer and heat pump air condensing dryer, wherein:
the working principle of the direct-exhausting clothes dryer is that hot air is directly exhausted out of the machine through a drain pipe after moisture is taken away. The clothes dryer has relatively simple structure and low cost, and is a drum-type clothes dryer with relatively low price on the market.
Compared with a direct-exhaust type clothes dryer, the clothes dryer has the advantages that a condensation process is added, namely, water vapor blown out in the drying process is discharged in a cold water cooling mode through a heat exchanger, and compared with the direct-exhaust type clothes dryer, the space is not affected by the fact that air with the water vapor is directly discharged, but hot air is discharged from the clothes dryer body, and the indoor temperature is affected to a certain extent.
The principle of the heat pipe air condensation type clothes dryer is the same as that of the heat pipe water cooling type clothes dryer, and only compared with the former condensation mode, the heat pipe air condensation type clothes dryer has the advantages that cold water is changed into cold air, so that the heat pipe air condensation type clothes dryer is relatively more environment-friendly and saves water.
Compared with a heat pipe type dryer, the heat pump air condensation type dryer has the advantages that the temperature of hot air blown out of the heat pump dryer is more uniform, the same quantity of clothes are dried, the power consumption is lower, meanwhile, heat only circulates in the machine, the temperature of air discharged out of the machine is equivalent to the room temperature, and no influence is caused on the surrounding environment.
In the process of implementing the present invention, the inventor of the present application finds that, in the clothes dryer in the above-mentioned scheme of the prior art, a filter screen is generally installed in front of the heat exchanger to reduce the adhesion problem of the lint on the heat exchanger, and the filter screen in front of the heat exchanger needs to be manually cleaned to clean the lint. In actual use, however, a user easily forgets to clean the heat exchanger, so that the defects that the amount of flocks attached to the front filter screen of the heat exchanger is too large, the air duct is blocked, and the drying time and the drying effect are affected are caused.
Disclosure of Invention
The embodiment of the invention aims to provide a method which can keep a heat exchanger of a clothes dryer clean under the condition of no filter screen, and is convenient and reliable.
In order to achieve the above object, an embodiment of the present invention provides a control method of a dryer, including:
detecting the humidity in the clothes drying barrel after the clothes dryer is started; and
periodically flushing a heat exchanger of the dryer with water when the detected humidity reaches a first preset value until the detected humidity reaches a second preset value.
Optionally, the control method further includes:
when the detected humidity reaches the first preset value, water accumulation is started; and
flushing the heat exchanger with the accumulated water.
Optionally, the control method further includes:
after the clothes dryer is started, sending the condensed water of the heat exchanger to a water box; and
and when the detected humidity reaches a first preset value, accumulating the condensed water and stopping sending the condensed water to the water box.
Optionally, the control method further includes: sending the water after flushing the heat exchanger to a water box.
Optionally, after the detected humidity reaches the second preset value, the method further comprises: the dryer enters a cooling phase.
Optionally, when the detected humidity reaches the second preset value, the method further includes: the heat exchanger was again rinsed with water.
In another aspect of embodiments of the present invention, there is also provided a clothes dryer including a motor, a clothes drying tub, a humidity detecting unit, a control unit, a drain pump, a heat exchanger, and a water tank, wherein,
the motor is configured to drive the laundry tub under the control of the control unit; and
the humidity detection unit is configured to detect humidity in the laundry tub and transmit a detection result to the control unit;
the clothes dryer also comprises a three-way valve, an
The three-way valve is configured to send a flow of water from the drain pump to the water box in a first conducting state, and to send a flow of water from the drain pump to the heat exchanger to flush the heat exchanger in a second conducting state; and
the control unit is configured to control the working state of the drain pump and the conduction state of the three-way valve when the humidity detected by the humidity detection unit reaches a first preset value, so as to periodically flush the water to the heat exchanger until the humidity detected by the humidity detection unit reaches a second preset value.
Optionally, the control unit is further configured to control the drain pump to stop working to accumulate water when the humidity detected by the humidity detection unit reaches the first preset value; and
periodically controlling the drain pump to be turned on to flush the heat exchanger with the accumulated water.
Optionally, the accumulated water is condensed water from the heat exchanger.
Optionally, the control unit is configured to:
and controlling the working state of the drainage pump and the conduction state of the three-way valve so as to send the water after the heat exchanger is flushed to a water box.
Optionally, after the humidity detected by the humidity detection unit reaches a second preset value, the clothes dryer enters a cooling stage.
Optionally, when the humidity detected by the humidity detection unit reaches the second preset value, the controller is configured to control the drain pump to be turned on to flush the heat exchanger with water again.
Through the technical scheme, the heat exchanger of the clothes dryer is periodically washed by water in the operation process of the clothes dryer, so that attached burrs on the heat exchanger can be effectively removed, and inconvenience caused by manual cleaning of a filter screen in front of the heat exchanger is eliminated.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
fig. 1 is a flowchart of a control method of a dryer according to an embodiment of the present invention;
FIG. 2 is a flowchart of a control method of a dryer according to an exemplary embodiment of the present invention;
FIG. 3 is a schematic diagram of a dryer assembly in which embodiments of the present invention may be implemented;
FIG. 4 is a flow chart of a washing control of the dryer provided by the embodiment of the present invention; and
fig. 5 is a block diagram of a program control of a dryer provided in an embodiment of the present invention.
Description of the reference numerals
10 motor 2 clothes drying barrel
30 temperature detecting unit 40 drain pump
50 three-way valve 60 control unit
70 heat exchanger 80 water box
100 clothes dryer.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 is a flow chart of a control method of a clothes dryer according to an embodiment of the present invention. As shown in fig. 1, the embodiment of the present invention provides a method capable of keeping a heat exchanger of a dryer clean without a filter screen, and the method is convenient and reliable.
Specifically, the control method of the clothes dryer provided by the embodiment of the invention can comprise the following steps:
s101, detecting the humidity in a clothes drying barrel after the clothes dryer is started; and
for example, after the dryer is started, the humidity inside the laundry tub (or the humidity of the laundry inside the tub) may be detected by a humidity detection unit of the dryer, such as a humidity sensor.
And S102, periodically flushing a heat exchanger of the clothes dryer by using water when the detected humidity reaches a first preset value until the detected humidity reaches a second preset value.
Considering that lint on the laundry remains attached to the laundry when the humidity of the laundry in the tub is high, the humidity in the tub of the dryer may be kept detected when the dryer is started, and when the detected humidity reaches a first preset value (e.g., corresponding to a humidity value at which the lint will start to be easily detached from the laundry), the heat exchanger of the dryer is started to be periodically washed using water. Because the main effect of heat exchanger is used for the moist hot air condensation through the heat exchanger, consequently, can adopt the mode of periodic washing to the attached flock on water will the heat exchanger is washed away when guaranteeing the heat exchanger effective work, thereby guarantees that the heat exchanger is clean.
When the humidity of the laundry is gradually decreased and the drying process is to be completed, for example (which may be determined, for example, by the humidity reaching the second preset value), the heat exchanger may be rinsed with water again to clean the heat exchanger after the drying process is completed.
Through the technical scheme, the heat exchanger of the clothes dryer is periodically washed by water in the operation process of the clothes dryer, so that attached burrs on the heat exchanger can be effectively removed, and inconvenience caused by manual cleaning of a filter screen in front of the heat exchanger is eliminated.
In the embodiment, the water used for the above process may be condensed water generated in the condensation process of the heat exchanger, or may be washing water supplied from the outside of the dryer. In view of resource conservation, the embodiment of the invention uses the condensed water generated in the condensation process of the heat exchanger to flush the heat exchanger. In an exemplary embodiment, the control method provided by the present invention may include: starting to accumulate water (for example, condensed water) when the detected humidity reaches the first preset value; and flushing the heat exchanger with the accumulated water. In an embodiment, the condensed water may be accumulated in a condensed water tank provided at a lower portion of the heat exchanger, and the condensed water may be accumulated by stopping an operation of a drain pump of the dryer. In various embodiments, additional condensate accumulation containers may be provided separately to contain more condensate for flushing.
As described above, compared with the existing dryer, the control method provided by the embodiment of the invention sends the condensed water generated by the heat exchanger to the water box after the dryer is started; and when the detected humidity reaches a first preset value, beginning to accumulate the condensed water and stopping sending the condensed water to the water box. In an embodiment, after flushing the heat exchanger, the water after flushing the heat exchanger may be sent to a water box.
In an embodiment, the periodic flushing of the heat exchanger may be performed by counting the time for accumulating the condensed water, for example, by starting a timer after the accumulation of the condensed water is started and then flushing the heat exchanger once every predetermined time (e.g., T1) has elapsed. In various embodiments, since the condensed water generated by the heat exchanger is gradually reduced and the lint may be gradually increased in the same time as the humidity of the laundry is gradually reduced, the washing process may be controlled with a variable period in order to ensure the washing effect. For example, when the humidity reaches a first preset value, the first stage (or the first washing stage) is set, and the heat exchanger is periodically washed with water according to a first cycle; after a predetermined time, a second phase (or second flush phase) is entered, and the heat exchanger is periodically flushed with water according to a second cycle. Wherein the second period may be greater than the first period. In an embodiment, the number of the rinsing phases (e.g., three rinsing cycles, four rinsing cycles, etc.) may be set according to the laundry humidity variation law, and the rinsing effect may be optimized in a plurality of rinsing cycles.
In an embodiment, after the humidity of the laundry reaches the second preset value, it may be determined that the laundry is dried, so that the dryer may be controlled to enter the cooling stage. The cooling phase may be performed according to the procedure of the cooling phase of the existing clothes dryer, which will not be described herein. It should be noted that, as described above, after the humidity of the laundry reaches the second preset value, that is, after the dryer enters the cooling stage, the above-mentioned washing process may be performed again to clean the heat exchanger after the drying process is completed.
FIG. 2 is a flow chart of a control method of a clothes dryer according to an exemplary embodiment of the present invention, as shown in FIG. 2, after drying starts, clothes are less in wet lint, and at this time, water can be pumped to a water box at regular time, then whether the current humidity reaches L1 is continuously judged, if L1 is reached, the water pumping at regular time is stopped, water storage is started, and timing is started, when the current humidity does not reach L2, and the water storage time reaches T1, the heat exchanger can be started to be washed, water is pumped to the water box after washing, condensed water and lint are collected to the water box, the water storage, washing and water pumping can be repeated for many times between the humidity L1 and L2, when the humidity reaches L2, drying is stopped, washing is started, water is pumped after washing, the condensed water and the lint are collected to the water box, and drying ends after water pumping, and a user can take out clothes as needed.
FIG. 3 is a schematic diagram of a dryer assembly in which embodiments of the present invention may be implemented. As shown in fig. 3, a dryer 100 according to an embodiment of the present invention may include a motor 10, a tub 20, a humidity detecting unit 30, a control unit 60, a drain pump 40, a heat exchanger 70, and a water box 80, in which white arrows in fig. 3 indicate signal flow directions, solid arrows indicate water flow directions, wherein,
the motor 10 is connected to the drying tub 20, and drives the drying tub 20 under the control of the control unit 60; for example, the control unit 60 controls the motor 10 according to the motor control beat to control the laundry tub 20.
The humidity detection unit 30 is configured to detect a current humidity loaded in the drying tub 20 of the dryer 100 or a humidity of air in the drying tub 20 while the dryer 100 performs a drying function, and generate a current humidity detection result to be transmitted to the control unit 60.
The dryer 100 further includes a three-way valve 50, the conduction state of which is controlled by the control unit 60, and which sends the water flow from the drain pump 40 to the water box 80 in a first conduction state, and sends the water flow from the drain pump 40 to the heat exchanger 70 to be washed in a second conduction state.
The control unit 60 may control an operation state (e.g., start or stop) of the drain pump 40 and a conduction state of the three-way valve 50 (e.g., a conduction state capable of sending the water flow from the drain pump 40 to the water box 80 is defined as a three-way valve, and a conduction state capable of sending the water flow from the drain pump 40 to the heat exchanger 70 for flushing is defined as a three-way valve opening) when the humidity detected by the humidity detecting unit 30 reaches a first preset value (e.g., L1), to periodically (e.g., at a period of time T1) flush the heat exchanger 70 with water until the humidity detected by the humidity detecting unit 30 reaches a second preset value (e.g., L2).
The dryer 100 shown in fig. 3 may be adapted to perform the control method of the dryer provided in the above-described embodiments of the present invention. An exemplary cleaning control flow may be shown in fig. 4, and may include the following steps:
s1, starting the clothes dryer;
s2, determining a drying program;
s2, starting, executing a drying function, detecting a load humidity value, and pumping dried condensate water to a water box through a drainage pump according to a fixed beat;
s4, drying until the humidity detection value reaches the target humidity L1, stopping the work of the drainage pump, starting water storage, and continuing drying;
s5, when the water storage time reaches T1, opening a three-way valve and a drainage pump according to a time sequence, flushing a heat exchanger, and keeping drying continuously;
s6, opening a drainage pump to pump the washed water to a water box;
s7, drying until the humidity detection value reaches the final target humidity L2;
s8, entering a cooling stage, opening the three-way valve and the drainage pump again according to the time sequence, and flushing the heat exchanger;
s9, after the cooling stage is finished, entering a water pumping stage;
s10, finishing the water fetching stage and the drying process, entering a crease-resistant stage, and fetching clothes;
and S11, after the crease-resist stage is finished, finishing all the procedures and shutting down the machine.
Fig. 5 is a block diagram of a program control of a dryer provided in an embodiment of the present invention. As shown in fig. 5, in an exemplary embodiment, when the dryer is pumping water, only the drain pump 40 may be activated, i.e., the water flow is allowed to flow to the water box 80; when the clothes dryer stores water, the drainage pump 40 and the three-way valve 50 do not work, namely the drainage pump 40 stops and the three-way valve 50 is closed; during the washing of the dryer, the three-way valve 50 and the drain pump 40 are both operated, i.e. the drain pump 40 is activated and the three-way valve 50 is opened, allowing water to flow to the heat exchanger 70 for washing.
In an embodiment, the control unit 60 may control the drain pump 40 to stop operating to accumulate water (e.g., condensed water) when the humidity detected by the humidity detecting unit 30 reaches a first preset value; and periodically controlling the drain pump 40 to be turned on to flush the heat exchanger 70 with the accumulated condensed water.
As described above, according to the control method of the clothes dryer and the clothes dryer provided by the embodiments of the present invention, in the automatic drying process, the operating states of the drain pump and the three-way valve are adjusted according to the current detected humidity, so that the condensed water is distributed to be used to automatically flush the heat exchanger without the filter screen at a specific stage, and not only can the lint attached to the heat exchanger without the filter screen be cleaned, but also the condensed water and the lint can be collected.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.
Those skilled in the art can understand that all or part of the steps in the method for implementing the above embodiments may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a (may be a single chip, a chip, etc.) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.
Claims (9)
1. A control method of a clothes dryer, characterized by comprising:
detecting the humidity in the clothes drying barrel after the clothes dryer is started; and
starting to accumulate water when the detected humidity reaches a first preset value, periodically flushing a heat exchanger of the clothes dryer with water until the detected humidity reaches a second preset value,
the water is condensed water generated in the condensation process of the heat exchanger, and a washing period is set according to the clothes humidity change rule so that the heat exchanger is periodically washed by the condensed water.
2. The control method according to claim 1, characterized by further comprising:
after the clothes dryer is started, sending the condensed water of the heat exchanger to a water box; and
and when the detected humidity reaches a first preset value, accumulating the condensed water and stopping sending the condensed water to the water box.
3. The control method according to claim 1 or 2, characterized by further comprising:
sending the water after flushing the heat exchanger to a water box.
4. The control method according to claim 1 or 2, wherein after the detected humidity reaches a second preset value, the method further comprises: the dryer enters a cooling phase.
5. The control method according to claim 1 or 2, characterized in that when the detected humidity reaches the second preset value, the method further comprises: the heat exchanger was again rinsed with water.
6. A clothes dryer includes a motor, a drying tub, a humidity detecting unit, a control unit, a drain pump, a heat exchanger, and a water tank, wherein,
the motor is configured to drive the laundry tub under the control of the control unit; and
the humidity detection unit is configured to detect humidity in the laundry tub and transmit a detection result to the control unit;
characterized in that the clothes dryer also comprises a three-way valve, and
the three-way valve is configured to send a flow of water from the drain pump to the water box in a first conducting state, and to send a flow of water from the drain pump to the heat exchanger to flush the heat exchanger in a second conducting state; and
the control unit is configured to control the operation state of the drain pump and the conduction state of the three-way valve to periodically flush the water to the heat exchanger until the humidity detected by the humidity detection unit reaches a second preset value when the humidity detected by the humidity detection unit reaches a first preset value,
wherein, when the humidity detected by the humidity detection unit reaches the first preset value, the control unit controls the drainage pump to stop working to accumulate water,
the accumulated water is condensed water from the heat exchanger, and a washing period is set according to the clothes humidity change rule so that the condensed water periodically washes the heat exchanger.
7. The clothes dryer of claim 6, wherein the control unit is configured to:
and controlling the working state of the drainage pump and the conduction state of the three-way valve so as to send the water after the heat exchanger is flushed to a water box.
8. The clothes dryer of claim 6, wherein the clothes dryer enters a cooling phase after the humidity detected by the humidity detecting unit reaches a second preset value.
9. The clothes dryer of claim 6, wherein when the humidity detected by the humidity detection unit reaches the second preset value, the controller is configured to control the drain pump to be turned on to flush the heat exchanger with water again.
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| CN201710325312.3A CN107245864B (en) | 2017-05-10 | 2017-05-10 | Control method of clothes dryer and clothes dryer |
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| CN101387059A (en) * | 2007-09-11 | 2009-03-18 | 博西华电器（江苏）有限公司 | Clothing washing facility with drying program and control method thereof |
| CN104911876A (en) * | 2014-03-14 | 2015-09-16 | 海尔集团公司 | Flushing structure for heat exchanger |
| CN105625007A (en) * | 2014-12-01 | 2016-06-01 | 青岛海尔洗衣机有限公司 | Lint cleaning device and method for clothes dryer evaporator |
| CN105951402A (en) * | 2016-06-30 | 2016-09-21 | 无锡小天鹅股份有限公司 | Cleaning control method and system of heat exchanger for clothes dryer and clothes dryer |
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| CN101387059A (en) * | 2007-09-11 | 2009-03-18 | 博西华电器（江苏）有限公司 | Clothing washing facility with drying program and control method thereof |
| CN104911876A (en) * | 2014-03-14 | 2015-09-16 | 海尔集团公司 | Flushing structure for heat exchanger |
| CN105625007A (en) * | 2014-12-01 | 2016-06-01 | 青岛海尔洗衣机有限公司 | Lint cleaning device and method for clothes dryer evaporator |
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