CN115450021A - Drum washing machine and control method thereof - Google Patents
Drum washing machine and control method thereof Download PDFInfo
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- CN115450021A CN115450021A CN202211315436.0A CN202211315436A CN115450021A CN 115450021 A CN115450021 A CN 115450021A CN 202211315436 A CN202211315436 A CN 202211315436A CN 115450021 A CN115450021 A CN 115450021A
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- water level
- electric conduction
- washing machine
- accommodating cavity
- drum washing
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- 238000005406 washing Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 279
- 238000001514 detection method Methods 0.000 claims abstract description 63
- 238000010438 heat treatment Methods 0.000 claims description 47
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000003205 fragrance Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 238000000222 aromatherapy Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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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
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/08—Liquid supply or discharge arrangements
- D06F39/087—Water level measuring or regulating devices
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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
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
- D06F33/34—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of water filling
-
- 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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/18—Washing liquid level
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
The application discloses drum type washing machine and control method thereof, the washing machine includes: the outer cylinder is provided with a first accommodating cavity; the inner cylinder is provided with a second accommodating cavity and is positioned in the first accommodating cavity, and the second accommodating cavity is communicated with the first accommodating cavity; the first water level detection device comprises a first electric conduction part and a second electric conduction part which are arranged at intervals, and the first electric conduction part and the second electric conduction part are arranged between the outer barrel and the inner barrel and are lower than the preset low water level of the first accommodating cavity; when the water in the first accommodating cavity rises to be in contact with the first electric conduction part and the second electric conduction part, the first electric conduction part and the second electric conduction part are conducted through the water in the first accommodating cavity, so that the first water level detection device works to generate a water level sensing signal. Therefore, because first electric conduction portion and second electric conduction portion are less than and predetermine the low water level, can realize detecting the water level that is less than and predetermine the low water level, can improve the detection accuracy to the low water level.
Description
Technical Field
The application relates to the technical field of household appliances, in particular to a drum washing machine and a control method thereof.
Background
An outer drum and an inner drum are arranged in a shell of the drum washing machine, the inner drum is used as an important part for washing, and holes are usually arranged on the drum wall to enable the inner drum and the outer drum to be communicated, and water is supplied to the outer drum in the clothes washing process. To determine the amount of water supplied, the drum washing machine is provided with a water level detecting device to be able to detect the water level in real time.
At present, the detection precision of a water level detection device used in a drum washing machine has a certain interval range (corresponding to a certain height range of water level in an inner drum), the error is increased when the detection precision exceeds the range, the water level accuracy is greatly reduced, and the high-accuracy detection requirement of certain specific programs on low water level exceeding the range cannot be met.
Disclosure of Invention
The application provides a drum washing machine and a control method thereof, which can improve the detection accuracy of low water level.
The present application provides in a first aspect a drum washing machine, in particular a drum washing machine comprising: the outer cylinder is provided with a first accommodating cavity; the inner cylinder is provided with a second accommodating cavity, the inner cylinder is positioned in the first accommodating cavity, and the second accommodating cavity is communicated with the first accommodating cavity; the first water level detection device comprises a first electric conduction part and a second electric conduction part which are arranged at intervals, the first electric conduction part and the second electric conduction part are arranged between the outer barrel and the inner barrel, and the first electric conduction part and the second electric conduction part are lower than the preset low water level of the first accommodating cavity; when water in the first accommodating cavity rises to be in contact with the first electric conduction part and the second electric conduction part, the first electric conduction part and the second electric conduction part are conducted through the water in the first accommodating cavity, so that the first water level detection device works to generate a water level sensing signal.
In some embodiments, the drum washing machine further includes a heating device disposed between the outer drum and the inner drum, the heating device is configured to heat the water in the first accommodating chamber, and at least one of the first electrically conducting part and the second electrically conducting part is higher than a top of the heating device in a height direction of the drum washing machine.
In some embodiments, the first water level detecting device is fixed to a peripheral wall and/or a side wall of the tub, and the heating device, the first electric conduction part, and the second electric conduction part are located below the tub in a height direction of the drum washing machine.
In some embodiments, the first conduction part is higher than the second conduction part in a height direction of the drum washing machine, and the first conduction part is higher than the top of the heating device.
In some embodiments, the bottom of the outer barrel is recessed towards a direction away from the inner barrel to form a receiving groove, and the heating device, the first electrically conducting portion and the second electrically conducting portion are disposed in the receiving groove.
In some embodiments, the first water level detecting device includes a housing, the housing is hollow to form a closed space, the first and second electrically conducting portions penetrate through the housing, first ends of the first and second electrically conducting portions are exposed out of the housing to be conducted by water in the first accommodating cavity, and second ends of the first and second electrically conducting portions are exposed out of the housing and located outside the first accommodating cavity to be connected to the positive terminal and the negative terminal, respectively.
In some embodiments, the first electrically conducting portion and the second electrically conducting portion are disposed at one end of the housing, an end surface of the housing at the end where the first electrically conducting portion is disposed is a plane, and heights of the first ends of the first electrically conducting portion and the second electrically conducting portion with respect to the end surface are the same.
In some embodiments, the drum washing machine further comprises a second water level detection device disposed outside the first accommodating chamber, the second water level detection device comprises a pressure sensor and a conduction pipe, and the pressure sensor is communicated with the first accommodating chamber through the conduction pipe; when the water level in the first accommodating cavity is higher than the preset low water level, the second water level detection device detects the pressure value in the conduction pipe through the pressure sensor so as to detect the water level detection of the first accommodating cavity.
The present application provides in a second aspect a control method for a drum washing machine, the method being based on the drum washing machine of any of the above embodiments, the method comprising: acquiring a target water level range corresponding to a current running program; and when the highest water level in the target water level range is lower than the preset low water level, controlling the first water level detection device to detect the water level in the first accommodating cavity.
In some embodiments, after the step of obtaining the target water level range corresponding to the currently running program, the method includes: and when the lowest water level in the target water level range is higher than the preset low water level, controlling the second water level detection device to detect the water level in the first accommodating cavity.
The application has at least the following beneficial effects: based on the drum washing machine and the control method thereof provided by the application, the first water level detection device comprises a first electric conduction part and a second electric conduction part which are arranged at intervals, the first electric conduction part and the second electric conduction part are arranged in the first accommodating cavity and are positioned outside the second accommodating cavity, and the first electric conduction part and the second electric conduction part are lower than the preset low water level of the first accommodating cavity; when the water level in the first accommodating cavity reaches a preset working water level, the first electric conduction part and the second electric conduction part are conducted through water in the first accommodating cavity, so that the first water level detection device works to generate a water level sensing signal. Consequently, first electric conduction portion and second electric conduction portion are less than predetermineeing the low water level, and when the water of first holding intracavity made first electric conduction portion and second electric conduction portion to switch on, first water level detection device work produced water level sensing signal to the realization detects the water level that is less than predetermineeing the low water level, can improve the detection accuracy to the low water level.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a drum washing machine provided by the present application;
FIG. 2 is a schematic view of the drum washing machine of FIG. 1 from another perspective;
FIG. 3 isbase:Sub>A sectional view of the drum washing machine of FIG. 2 taken along section line A-A;
FIG. 4 is a schematic structural view of the drum washing machine of FIG. 1 from a further perspective;
fig. 5 is an enlarged schematic view of the structure of the region B in fig. 4;
FIG. 6 is a schematic view illustrating the structure of the water level detecting apparatus of FIG. 5;
FIG. 7 is an enlarged view of the structure of the area A in FIG. 3;
FIG. 8 is a schematic structural view of the first water level detecting apparatus of FIG. 7 from another perspective;
FIG. 9 is a sectional view of the first water level detecting unit of FIG. 8 taken along a sectional line B-B;
fig. 10 is an enlarged view illustrating a partial structure of the drum washing machine of fig. 1;
FIG. 11 is a schematic flow chart diagram illustrating an embodiment of a control method for a drum washing machine according to the present application;
fig. 12 is a flowchart illustrating another embodiment of a control method of a drum washing machine according to the present application.
Description of reference numerals: 10. a drum washing machine; 11. an outer cylinder; 111. a first accommodating cavity; 1111. an accommodating groove; 12. an inner barrel; 121. a second accommodating cavity; 13. a first water level detection device; 131. a first conductive part; 132. a second conductive part; 134. a housing; 134. sealing the space; 14. a heating device; 141. a pressure sensor; 142. a conduction pipe.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and claims of this application and in the above-described drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
inbase:Sub>A first aspect,base:Sub>A drum washing machine 10 is provided, fig. 1 isbase:Sub>A schematic structural diagram of an embodiment of the drum washing machine 10, fig. 2 isbase:Sub>A schematic structural diagram of the drum washing machine 10 in fig. 1 from another view angle, and fig. 3 isbase:Sub>A sectional view of the drum washing machine 10 in fig. 2 alongbase:Sub>A sectional linebase:Sub>A-base:Sub>A.
The drum washing machine 10 includes an outer drum 11 and an inner drum 12, the outer drum 11 is provided with a first accommodating chamber 111, the inner drum 12 is provided with a second accommodating chamber 121, the inner drum 12 is located in the first accommodating chamber 111, and the second accommodating chamber 121 is communicated with the first accommodating chamber 111.
The second accommodating chamber 121 of the drum 12 is used for accommodating the laundry to be washed, so that the laundry is washed in the second accommodating chamber 121. When the drum washing machine 10 runs a washing program, water enters the first accommodating cavity 111 of the outer tub 11, and after the water level in the first accommodating cavity 111 reaches a certain height, the water in the first accommodating cavity 111 enters the second accommodating cavity 121, so that the washed clothes in the second accommodating cavity 121 are soaked.
During the washing of the laundry, the inner tub 12 rotates along its axis in the first accommodating chamber 111 to wash the washed laundry by the rotation, while the outer tub 11 does not move.
Fig. 4 is a schematic structural view of the drum washing machine 10 in fig. 1 from a further viewing angle, and fig. 5 is an enlarged schematic structural view of a region B in fig. 4.
Referring to fig. 4 and 5, the drum washing machine 10 further includes a first water level detecting device 13, the first water level detecting device 13 is disposed on the sidewall of the outer tub 11, and the first water level detecting device 13 is used for detecting the water level in the first accommodating chamber 111.
Fig. 6 is a schematic structural view of the water level detection device 13 in fig. 5, and fig. 7 is an enlarged schematic structural view of a region a in fig. 3.
Referring to fig. 6, in particular, the first water level detecting device 13 includes a first conductive part 131 and a second conductive part 132 which are arranged at intervals, and when the first conductive part 131 is electrically conducted with the second conductive part 132, the first water level detecting device 13 is operated to generate a sensing signal.
Referring to fig. 7, the first and second conductive parts 131 and 132 are disposed between the outer barrel 11 and the inner barrel 12, and the first and second conductive parts 131 and 132 are lower than the preset low water level of the first accommodating cavity 111.
Specifically, the preset low water level of the first receiving cavity 111 may be the lowest water level of the washing machine during the washing process, and the preset low water level is generally higher than the bottom of the inner tub 12. Of course, in other embodiments, the preset low water level may be set by the user, for example, to a position between the heating device and the drum.
It should be understood that the lowest water level of the water levels required by the existing drum washing machine when most programs are operated is higher than the preset low water level, and thus when the water level is detected, the detection accuracy is higher when the water level is higher than the preset low water level, but the detection accuracy is lower when the water level is lower than the preset low water level. The application provides a water level detection device 13 can carry out the detection of high accuracy to being less than the water level of predetermineeing low water level, specifically as follows:
when the water in the first accommodating cavity 111 rises to contact with the first conducting part 131 and the second conducting part 132, the first conducting part 131 and the second conducting part 132 are conducted through the water in the first accommodating cavity 111, so that the first water level detecting device 13 works to generate a water level sensing signal. The first water level detecting device 13 is further connected to a controller (not shown) of the drum washing machine 10, and a sensing signal generated by the first water level detecting device 13 is transmitted to the controller, and the controller knows the water level in the first accommodating chamber 111 based on the sensing signal, so as to perform a control operation.
It should be understood that when the water in the first accommodating cavity 111 contacts the first conducting part 131 and the second conducting part 132 at the same time, the first conducting part 131 and the second conducting part 132 are conducted through the water in the first accommodating cavity 111. Therefore, only when the water level in the first accommodating chamber 111 rises to the preset water level, the first water level detecting device 13 will generate a sensing signal, and then detect the preset water level.
In summary, based on the drum type washing machine 10 provided by the present application, since the first electric conduction part 131 and the second electric conduction part 132 of the first water level detection device 13 are both lower than the preset low water level of the first accommodating chamber 111, when the water in the first accommodating chamber 111 reaches the preset water level to make the first electric conduction part 131 and the second electric conduction part 132 conduct, the preset water level is lower than the preset low water level, so as to realize accurate detection of the lower water level.
Referring to fig. 3 and 7, in some embodiments, the drum washing machine 10 further includes a heating device 14, the heating device 14 is disposed between the outer drum 11 and the inner drum 12, and the heating device 14 is used for heating the water in the first accommodating cavity 111.
The heating device 14 may include a heating pipe directly exposed in the first accommodating cavity 111, and the heating pipe may directly contact with the water in the first accommodating cavity 111 to directly heat the water in the first accommodating cavity 111. It should be understood that the heating device 14 is disposed at a lower position, and the operation of the heating device 14 generally corresponds to a fragrance or steam washing procedure, and the water level in the first accommodating chamber 111 is lower and generally not higher than the bottom of the inner barrel 12.
By arranging the heating device 14 between the outer cylinder 11 and the inner cylinder 12, a small amount of water in the first accommodating chamber 111 can be heated, and the requirements of procedures such as fragrance, steam washing and the like can be met.
At least one of the first and second conduction parts 131 and 132 is higher than the top of the heating device 14 in the height direction of the drum washing machine 10 in combination with the installation position of the first water level detection device 13.
In this arrangement, when the first conducting part 131 is conducted with the second conducting part 132, the preset water level detected by the first water level detecting device 13 is higher than the top of the heating device 14, that is, when the first detecting device 13 obtains the sensing signal, the water in the first accommodating cavity 111 covers the heating device 14.
In some application scenarios, when the first water level detecting device 13 obtains the sensing signal, the heating device 14 is controlled to operate, and at this time, the water in the first accommodating cavity 111 covers the top of the heating device 14, so as to prevent the heating device 14 from being damaged due to dry burning during operation.
In combination with the above, when the water level in the first accommodating cavity 111 drops, and the first conducting part 131 and the second conducting part 132 are not conducted, the first water level detecting device 13 does not generate a sensing signal, which indicates that the water level does not reach the preset water level. In combination with the heating device 14, when the water level in the first accommodating chamber 111 drops to a level where the first conductive part 131 is not conducted with the second conductive part 132 when the heating device 14 is in heating operation, the heating device 14 is stopped to prevent the heating device 14 from being burned. At this time, the preset water level corresponding to the sensing signal generated by the operation of the first water level detecting device 13 may be set as the safe water level for the operation of the heating device 14, that is, the heating device 14 may operate only when the water level reaches the safe water level and the sensing signal is generated by the first water level detecting device 13.
Referring to fig. 3 and 4, in some embodiments, the first water level detecting device 13 is fixed to a peripheral wall and/or a side wall of the outer tub 11, the peripheral wall of the outer tub 11 is a cylindrical wall of the outer tub 11, and the side wall of the outer tub 11 is an end wall of both ends of the outer tub 11. When the first water level detecting device 13 is fixed on the peripheral wall and/or the side wall of the outer tub 11, a part of the first water level detecting device 13 is located outside the outer tub 11, and a part of the first water level detecting device 13 is located inside the outer tub 11, that is, inside the first accommodating chamber 111, so that the part of the first water level detecting device 13 located outside the outer tub 11 is electrically connected with other devices, and the part located inside the outer tub 11 is provided with the first electric conduction part 131 and the second electric conduction part 132.
In conjunction with the installation positions of the heating device 14 and the first and second electrically conducting parts 131 and 132, the heating device 14, the first and second electrically conducting parts 131 and 132 are located below the inner tub 12 in the height direction of the drum washing machine 10. At this time, the positions of the first and second electric conduction parts 131 and 132 and the positions between the heating device 14 and the lower end of the inner barrel 12 are heated to detect the water level lower than the bottom of the inner barrel 12, and at this time, the safe water level for operating the heating device 14 is mainly detected.
Regarding the positional height relationship of the first and second conductive parts 131 and 132 in the first accommodating cavity 111, in some embodiments, the first conductive part 131 is higher than the second conductive part 132 in the height direction of the drum washing machine 10, and the first conductive part 131 is higher than the top of the heating device. Of course, in other embodiments, the heights of the first conducting part 131 and the second conducting part may be the same, and are not limited in particular.
In such an embodiment, during the process of the water level in the first accommodating chamber 111 rising, if the water in the first accommodating chamber 111 only covers the second conducting part 132 and does not cover the first conducting part 131, the first water level detecting device does not work. When the water level further rises to a level where the water in the first accommodating chamber 111 contacts the first conductive part 131, the first conductive part 131 and the second conductive part 132 are conducted.
Therefore, the first electric conduction part 131 may be disposed at a safe water level corresponding to the operation of the heating device 14, and the disposed position of the second electric conduction part 132 is not particularly limited.
In some embodiments, the first water level detecting device 13 includes a plurality of first conductive parts 131, the plurality of first conductive parts 131 are arranged at intervals in a height direction of the drum washing machine 10, and when different first conductive parts 131 are conducted with the second conductive parts 132, different sensing signals are generated to correspond to different water levels.
For example, three first conductive parts 131 are provided, which are respectively disposed at the lower part, the middle part and the upper part, and when the water level is the first water level, the second conductive part 132 is conducted with the first conductive part 131 at the lower part to generate the first sensing signal; when the water level is the second water level, the second conduction part 132 is conducted with the first conduction parts 131 at the lower part and the middle part to generate a second sensing signal; when the water level is the third water level, the second conductive part 132 is conductive with the first conductive parts 131 at the lower part, the middle part and the upper part to generate a third sensing signal, and the first sensing signal, the second sensing signal and the third sensing signal are different from each other.
Of course, a plurality of first water level detecting devices 13 may be provided, and the plurality of water level detecting devices 13 may detect different water levels respectively.
Referring to fig. 7, in some embodiments, the bottom of the outer barrel 11 is recessed toward a direction away from the inner barrel 12 to form a receiving groove 1111, and the heating device 14, the first conductive part 131 and the second conductive part 132 are disposed in the receiving groove 1111.
Specifically, the bottom of the outer tub 11 is recessed downward to form an accommodating groove 1111, and the accommodating groove 1111 extends in the axial direction of the outer tub 11. It should be understood that the receiving recess 1111 is a part of the first receiving chamber 111 of the tub 11, and the heating device 14 located in the receiving recess 1111 is operated to heat the water in the receiving recess 1111 to form steam, etc.
Through the arrangement mode, less water can be stored in the accommodating groove 1111, and then the heating device 14 evaporates the less water in the accommodating groove 1111 to provide required steam for the procedures of aromatherapy, steam washing and the like.
Fig. 8 is a schematic structural view of the first water level detecting device 13 of fig. 7 at another viewing angle, and fig. 9 is a sectional view of the first water level detecting device 13 of fig. 8 taken along a section line B-B.
With reference to fig. 8 and 9, in particular, the first water level detecting device 13 includes a housing 133, the housing 133 is hollow to form a closed space 134, and the first and second conduction parts 131 and 132 penetrate through the housing 133, so that portions of the first and second conduction parts 131 and 132 are located in the closed space 134.
Specifically, first ends of the first conducting part 131 and the second conducting part 132 are exposed out of the housing 133 to be conducted by the water in the first accommodating cavity 111. It should be understood that when the first ends of the first and second electric conduction parts 131 and 132 are in contact with the water in the first accommodating cavity 111, the water in the first accommodating cavity 111 does not enter the enclosed space 134, and the enclosed space 134 isolates one ends of the first and second electric conduction parts 131 and 132 from other parts.
Second ends of the first and second conductive parts 131 and 132 are exposed out of the housing 133 and located outside the first accommodating cavity 111 to be connected to the positive terminal and the negative terminal, respectively. First ends and second ends of the first conduction part 131 and the second conduction part 132 are two ends of the first conduction part and the second conduction part 132, respectively, which are opposite to each other, and since the second ends of the first conduction part 131 and the second conduction part 132 are connected to the positive terminal and the negative terminal, respectively, conduction is achieved when water contacts the first conduction part 131 and the second conduction part 132.
In combination with the above, when the first water level detecting device 13 is disposed on the wall of the outer tube 11, the side of the first water level detecting device 13 where the second ends of the first and second electric conduction parts 131 and 132 are disposed is disposed outside the outer tube, so as to avoid contact with water in the outer tube 11.
In some embodiments, the first and second conductive parts 131 and 132 are disposed at one end of the housing, an end surface of the housing at the end where the first conductive part 131 is disposed is a plane, and heights of the first ends of the first and second conductive parts 131 and 132 with respect to the end surface are the same.
Fig. 10 is an enlarged view of a part of the drum washing machine 10 of fig. 1.
Referring to fig. 1 and 10, in some embodiments, the drum washing machine 10 further includes a second water level detection device disposed outside the first receiving chamber 111, and the second water level detection device can detect a water level higher than a preset low water level with high precision.
Specifically, the second water level detecting means includes a pressure sensor 141 and a conduction pipe 142, and the pressure sensor 141 is communicated with the first accommodating chamber 111 through the conduction pipe 142. When the water level in the first accommodating chamber 111 is higher than the preset low water level, the second water level detecting device detects the pressure value in the conducting pipe 142 through the pressure sensor 141 to detect the water level detection of the first accommodating chamber 111.
It should be understood that, since the conducting pipe 142 is communicated with the water level in the first accommodating chamber 111, when the water level in the first accommodating chamber 111 rises, the air pressure in the conducting pipe 142 changes, the air pressure value in the conducting pipe 142 corresponds to the water level in the first accommodating chamber 111, and the pressure sensor 141 can detect the water level in the first accommodating chamber 111 by detecting the air pressure of the conducting pipe 142.
It should be understood that the pressure sensor 141 has a high detection accuracy when detecting the air pressure in the conduction pipe 142, only when the water level in the first accommodating chamber 111 is higher than the preset low water level. When the water level in the first accommodating cavity 111 is lower than the preset low water level, the detection accuracy is low. The second water level detection device of the application only detects the water level higher than the preset low water level, has higher detection precision, and is realized through the first water level detection device 13 in the water level detection lower than the preset low water level so as to avoid the problem of insufficient detection precision at the low water level.
In summary, based on the drum washing machine 10 provided in the present application, since the first electric conduction part 131 and the second electric conduction part 132 of the first water level detection device 13 are both lower than the preset low water level of the first accommodating chamber 111, when the water in the first accommodating chamber 111 reaches the preset water level and the first electric conduction part 131 and the second electric conduction part 132 are conducted, the preset water level is lower than the preset low water level, so as to realize accurate detection of the lower water level. When the water level in the first accommodating cavity 111 is higher than the higher water level of the preset low water level, the detection can be accurately realized through the second water level detection device, so that the drum washing machine 10 provided by the application can realize accurate water level detection at the high water level or the low water level.
In a second aspect, the present application provides a control method for a drum washing machine, which is based on the drum washing machine 10 in any one of the above embodiments, and fig. 11 is a flowchart illustrating an embodiment of the control method for the drum washing machine provided in the present application. With reference to fig. 11, the method comprises the following steps:
s11: and acquiring a target water level range corresponding to the current running program.
The drum washing machine has a plurality of processes such as a washing process, a fragrance process, and a steam washing process, etc. The drum washing machine generally has different target water level ranges, i.e., ranges having different water level applications, while running different programs.
For example, during a washing process, the water level corresponding to the water level range of the drum washing machine is high, while during a fragrance or steam washing process, the water level corresponding to the water level range is generally low.
S12: and when the highest water level in the target water level range is lower than the preset low water level, controlling the first water level detection device to detect the water level in the first accommodating cavity.
The highest water level of the target water level range is the highest water level required under the corresponding procedure in which the water level needs to be applied and detected.
When the highest water level of the target water level range is lower than the preset low water level, it is described that only the water level lower than the preset low water level needs to be detected in the corresponding procedure, and at this time, the detection is performed through the first water level detection device, so that the detection of the low water level with higher precision can be realized.
Fig. 12 is a flowchart illustrating a control method of a drum washing machine according to another embodiment of the present disclosure. Referring to fig. 12, in some embodiments, after the step of obtaining the target water level range corresponding to the currently running program, that is, after step S11, the method includes:
s13: and when the lowest water level in the target water level range is higher than the preset low water level, controlling the second water level detection device to detect the water level in the first accommodating cavity.
When the lowest water level of the target water level range is detected to be higher than the preset low water level, it is described that only the water level higher than the preset low water level needs to be detected in the corresponding procedure, and the water level lower than the preset low water level does not need to be detected. At this moment, the second water level detection device can realize the detection of the water level with higher accuracy.
In summary, based on the control method of the drum washing machine, different water level detection devices can be controlled corresponding to different water levels to perform water level detection, and therefore more accurate detection results can be achieved at both high water levels and low water levels.
The above are only embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent structures or equivalent processes performed by the present application and the contents of the attached drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A drum washing machine characterized by comprising:
the outer cylinder is provided with a first accommodating cavity;
the inner cylinder is provided with a second accommodating cavity, the inner cylinder is positioned in the first accommodating cavity, and the second accommodating cavity is communicated with the first accommodating cavity;
the first water level detection device comprises a first electric conduction part and a second electric conduction part which are arranged at intervals, the first electric conduction part and the second electric conduction part are arranged between the outer barrel and the inner barrel, and the first electric conduction part and the second electric conduction part are lower than the preset low water level of the first accommodating cavity;
when the water in the first accommodating cavity rises to be in contact with the first electric conduction part and the second electric conduction part, the first electric conduction part is conducted with the second electric conduction part through the water in the first accommodating cavity, so that the first water level detection device works to generate a water level sensing signal.
2. A drum washing machine according to claim 1,
the drum washing machine further comprises a heating device arranged between the outer barrel and the inner barrel, the heating device is used for heating the water in the first accommodating cavity, and at least one of the first electric conduction part and the second electric conduction part is higher than the top of the heating device in the height direction of the drum washing machine.
3. A drum washing machine according to claim 2,
the first water level detecting device is fixed to a peripheral wall and/or a side wall of the outer tub, and the heating device, the first electrically conductive part, and the second electrically conductive part are located below the inner tub in a height direction of the drum washing machine.
4. A drum washing machine according to claim 2,
the first conductive part is higher than the second conductive part in the height direction of the drum washing machine, and the first conductive part is higher than the top of the heating device.
5. A drum washing machine according to claim 3,
the bottom of urceolus orientation is kept away from the sunken holding recess that forms of direction of inner tube, heating device, first electric conduction portion and second electric conduction portion set up in the holding recess.
6. A drum washing machine according to claim 1,
first water level detection device includes the casing, the casing cavity is formed with airtight space, first electric conduction portion and second electric conduction portion passes the casing, first electric conduction portion and the first end of second electric conduction portion expose in the casing, in order to pass through water in the first holding intracavity switches on, first electric conduction portion and the second end of second electric conduction portion expose in the casing just is located outside the first holding intracavity to be connected with positive wiring end and negative terminal respectively.
7. A drum washing machine according to claim 6,
the first electrically conducting portion and the second electrically conducting portion are provided in one end of the housing, the housing is provided with an end face of one end of the first electrically conducting portion being a plane, and the first end of the first electrically conducting portion and the first end of the second electrically conducting portion are the same in height with respect to the end face.
8. A drum washing machine according to claim 1,
the drum washing machine further comprises a second water level detection device arranged outside the first accommodating cavity, the second water level detection device comprises a pressure sensor and a conduction pipe, and the pressure sensor is communicated with the first accommodating cavity through the conduction pipe;
when the water level in the first accommodating cavity is higher than the preset low water level, the second water level detection device detects the pressure value in the conduction pipe through the pressure sensor so as to detect the water level detection of the first accommodating cavity.
9. A control method of a drum washing machine, characterized in that the method is based on the drum washing machine of any one of the preceding claims 1-8, the method comprising:
acquiring a target water level range corresponding to a current running program;
and when the highest water level of the target water level range is lower than a preset low water level, controlling the first water level detection device to detect the water level in the first accommodating cavity.
10. The control method of a drum washing machine according to claim 9, characterized in that after the step of acquiring the target water level range corresponding to the current operation program based on the drum washing machine of claim 8, the method comprises:
and when the lowest water level of the target water level range is higher than a preset low water level, controlling the second water level detection device to detect the water level in the first accommodating cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211315436.0A CN115450021A (en) | 2022-10-25 | 2022-10-25 | Drum washing machine and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211315436.0A CN115450021A (en) | 2022-10-25 | 2022-10-25 | Drum washing machine and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115450021A true CN115450021A (en) | 2022-12-09 |
Family
ID=84311606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211315436.0A Withdrawn CN115450021A (en) | 2022-10-25 | 2022-10-25 | Drum washing machine and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115450021A (en) |
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2022
- 2022-10-25 CN CN202211315436.0A patent/CN115450021A/en not_active Withdrawn
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Application publication date: 20221209 |