CN114182515B - Clothes treatment equipment and control method for washing drying filter screen - Google Patents
Clothes treatment equipment and control method for washing drying filter screen Download PDFInfo
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- CN114182515B CN114182515B CN202111450585.3A CN202111450585A CN114182515B CN 114182515 B CN114182515 B CN 114182515B CN 202111450585 A CN202111450585 A CN 202111450585A CN 114182515 B CN114182515 B CN 114182515B
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- 238000001035 drying Methods 0.000 title claims abstract description 163
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005406 washing Methods 0.000 title claims abstract description 31
- 238000011010 flushing procedure Methods 0.000 claims abstract description 189
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 239000007921 spray Substances 0.000 claims abstract description 89
- 238000005507 spraying Methods 0.000 claims abstract description 86
- 238000004140 cleaning Methods 0.000 claims abstract description 47
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 230000003068 static effect Effects 0.000 claims description 42
- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 27
- 230000001276 controlling effect Effects 0.000 description 18
- 230000006870 function Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 9
- 239000002699 waste material Substances 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 206010063385 Intellectualisation Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000013528 artificial neural network Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001537 neural effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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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
- D06F58/32—Control of operations performed in domestic laundry dryers
- D06F58/34—Control of operations performed in domestic laundry dryers characterised by the purpose or target of the control
- D06F58/45—Cleaning or disinfection of machine parts, e.g. of heat exchangers or filters
-
- 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
- D06F2103/02—Characteristics of laundry or load
- D06F2103/04—Quantity, e.g. weight or variation of weight
-
- 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
- D06F2103/54—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to blowers or fans
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/02—Water supply
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/34—Filtering, e.g. control of lint removal devices
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
The application provides a clothes treatment device with a drying function and a filter screen flushing control method, wherein the clothes treatment device comprises a filter screen and a spray cleaning unit, wherein the filter screen is assembled in a drying air duct; the filter screen is used for filtering the filings doped in the drying air duct; the spray cleaning unit comprises a spray device with a water spray opening facing the filter screen and a spray water inlet valve for controlling intermittent flushing and continuous flushing of the spray device. In addition, the application also comprises a flushing method for drying the filter screen, and the flushing method is used for controlling the spraying device to alternately perform intermittent flushing and continuous flushing so as to achieve complete coverage of the spraying of the filter screen, thereby achieving a better flushing effect of the filter screen. The washing device of the drying filter screen is additionally arranged on the clothes treatment equipment, so that smoothness of a drying air duct can be effectively ensured, and the drying effect is ensured.
Description
Technical Field
The present application relates to a laundry treating apparatus, and more particularly, to a laundry treating apparatus having a screen washing device with a drying function.
Background
At present, a circulating air type drying device is additionally arranged in clothes treatment equipment, and the generation of filings is accompanied in the clothes drying process, so that a drying air channel is prevented from being blocked by filings, an air filtering unit is often arranged at an air inlet position of a fan, and filings in drying circulating air can be effectively filtered by a filter screen. If the filth accumulated in the filter screen is not cleaned timely to a certain extent, circulation of circulating air can be affected, so that drying efficiency is reduced.
Disclosure of Invention
The application provides clothes treatment equipment with a drying function and a drying filter screen flushing control method, which are used for solving the problem that filter screen filings are difficult to flush and the subsequent drying effect is affected; the method has the advantages that through the mode of combining intermittent spraying and continuous spraying, the complete coverage of the spraying of the filter screen is achieved, so that a better flushing effect of the filter screen is achieved, and a subsequent drying effect is guaranteed.
In a first aspect, a laundry treating apparatus with a drying function, characterized in that: the device comprises a cylinder body, a drying air duct, a filter screen, a spray cleaning unit and a control device; wherein,,
the drying air duct and the cylinder form a drying air circulation flow path for drying air;
the filter screen is arranged in the drying air circulation flow path and is used for filtering drying air.
The spray cleaning unit comprises a spray device for spraying the filter screen, and the spray device comprises a plurality of water spraying ports facing different areas of the filter screen;
the control device controls the water spraying port to realize a plurality of spraying modes, wherein the plurality of spraying modes comprise continuous spraying and intermittent spraying;
the multiple spraying modes can be controlled to operate in one mode or alternately operate in multiple modes according to the filter screen dirt blocking requirements;
the intermittent flushing is to enable a water nozzle of the spraying device to intermittently spray flushing medium;
the continuous flushing is to enable the water jet of the spraying device to continuously spray flushing medium.
In a specific implementation mode, the spraying device is provided with a water inlet valve for controlling the spraying mode of the spraying device; the continuous spraying and the intermittent spraying of the water jet are realized by controlling the opening and closing time of a water inlet valve, and the intermittent flushing is to enable the water jet of the spraying device to intermittently jet flushing medium by controlling the water inlet valve; the continuous flushing is to continuously spray flushing medium out of a water nozzle of the spraying device by controlling the spraying water inlet valve.
In a specific embodiment, the laundry treatment apparatus further comprises control means for controlling the shower inlet valve, the control means controlling the shower cleaning unit to wash in an intermittent and continuous manner through the shower inlet valve; wherein the intermittent flushing is to control a water nozzle of the spraying device to intermittently spray flushing medium by controlling the spraying water inlet valve; the continuous flushing is to control the water spraying port of the spraying device to continuously spray flushing medium by controlling the spraying water inlet valve. And (3) carrying out full-face coverage spraying on the filter screen by two different flushing modes.
In a specific embodiment, the intermittent flushing is mainly used for spraying the middle area of the filter screen, and the continuous flushing is mainly used for flushing the area of the filter screen located at two sides of the middle area and part of the middle area. Preferably, the intermittent spray is controlled to form an approximately parabolic flow surface with an area that increases from the bottom to the top on the screen surface, and the continuous spray is controlled to form a flow surface that covers approximately the entire screen surface.
In a second aspect of the present application, a method for washing a drying screen of a laundry treatment apparatus according to any one of the above-mentioned aspects, before or during execution of a drying program, if it is monitored that the screen needs to be cleaned, selecting an intermittent washing mode or a continuous washing mode according to a cleaning requirement, or alternatively washing the screen according to a preset cycle; the intermittent flushing mode is to control the intermittent opening and closing of the spray water inlet valve to realize intermittent spraying of flushing medium from a water nozzle of the spray device; and the continuous flushing mode is to control the continuous opening of the spray water inlet valve to realize continuous spraying of flushing medium from a water nozzle of the spray device.
In a specific embodiment, the spray device is controlled to spray intermittent flushing for a time t1, and after at least one intermittent flushing for a time t1, the spray device is controlled to spray continuous flushing for a time t 2. The flushing effect of the filter screen is ensured by flushing for different time periods.
In a specific embodiment, the interval time t3 between the intermittent flushing and the continuous flushing is controlled. There is a short interval during the alternating operation of the two forms.
In a specific embodiment, when t1+t2 < t, controlling the spray device by the spray water inlet valve to repeat the intermittent flushing and the continuous flushing until the flushing time reaches a time t; wherein t is the set flushing time. The control device is also used for controlling the total drying time t according to the weight W of the dried clothes before the filter screen is washed o The set flushing time t is determined. The set washing time t, the weight W of the dried clothes before washing the filter screen, and the total drying time t o The following formula is satisfied: t=a w ×t o The method comprises the steps of carrying out a first treatment on the surface of the Wherein a is w The scaling factor corresponding to W. The flushing time t is calculated, so that the flushing effect of the filter screen is guaranteed, the flushing time is saved, and the using amount of flushing medium is reduced.
In a specific embodiment, the flushing method comprises the steps of:
the execution time of the intermittent flushing mode is t1, the execution time of the continuous flushing mode is t2, and the total cleaning time of the filter screen is t;
if t is less than or equal to t1, only executing an intermittent flushing mode of t;
if t1 is less than t and less than t1+t2, executing an intermittent flushing mode of t1 and executing a continuous flushing mode of t-t 1;
if t is more than or equal to t1+t2, the intermittent flushing mode of t1 and the continuous flushing mode of t2 are alternately executed periodically until the time t is reached.
Further optionally, the control sets an interval time t3 between the intermittent flushing mode and the continuous flushing mode, and controls the water inlet valve to keep closing for the interval time t3 after each intermittent flushing mode or continuous flushing mode is executed, and then the next flushing mode is executed.
Further optionally, obtaining the total time of cleaning the filter screen to be t includes:
acquiring the last drying information;
calculating total filter screen cleaning time t=kW+at 0 according to the last drying clothes weight W and drying time t0, wherein k is a set value, and the ratio system of the washing time to the drying clothes weight W is set; a is a set value, and is a proportional coefficient corresponding to the flushing time length and the drying time length t 0. The washing time t is calculated, so that the washing time is saved while the washing effect of the filter screen is guaranteed, the using amount of washing media is reduced, and the situation that a user waits for drying too long after a water film is formed and the customer experience is influenced is avoided.
Further optionally, if the last drying information is not successfully obtained, a fixed flushing time period T is set, and the total cleaning time of the filter screen is t=t.
Further optionally, the monitoring the condition that the filter screen needs to be cleaned includes: and after the drying program executes a set period, judging that the filter screen needs to be washed. Further optionally, the drying program is a dehydration distribution stage before drying after executing a set period.
In a specific embodiment, the monitoring the condition that the filter screen needs to be cleaned includes: monitoring a current static pressure value K of a drying system; the current static pressure value K and the initial static pressure value K 0 Comparing;
if the current static pressure value K is less than or equal to n K 0 Judging that the filter screen needs to be washed;
wherein n is a set multiple, K is 0 And setting an initial static pressure value of the drying system at the rotating speed of the drying fan.
In a specific embodiment, the current static pressure value K is determined based on a functional relation with the current drying fan rotation speed and the current drying fan power, and the functional relation includes:
K＝aP+br+c............................(1)；
p is fan power, r is fan rotating speed; a is a fan power coefficient, b is a fan rotation speed coefficient, and c is a constant.
In the above description, through at clothing treatment facility internally mounted stoving filter screen washing unit, make the inside stoving air circulation of stoving wind channel smooth and easy, reduce the broken time of water film on the one hand, avoid user latency overlength, also reduced the energy consumption simultaneously and guaranteed the stoving effect.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the application, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present application, should fall within the ambit of the technical disclosure.
Fig. 1a is a schematic structural view of an embodiment of a laundry treating apparatus (drying system explosion) provided by the present application;
fig. 1b is a schematic structural view showing an embodiment of a laundry treating apparatus (drying system assembled together) according to the present application;
fig. 2 is a schematic structural view of an embodiment of the laundry treating apparatus (outer tub and shower assembly together) provided by the present application;
FIG. 3 is a schematic diagram of an embodiment of a filter screen and spray device according to the present application;
FIG. 4a is a schematic top view of an embodiment of a filter screen and spray member according to the present application;
FIG. 4b is a schematic diagram of a front view of an embodiment of a filter screen and spray member according to the present application;
FIG. 5a is a schematic diagram of an embodiment of the positional relationship between a filter screen and a spray member according to the present application;
FIG. 5B is a schematic view of the structure of the embodiment in the direction B in FIG. 5 a;
FIG. 6 is a schematic structural view of an embodiment of a spray member in a spray zone of a filter screen according to the present application;
fig. 7a is a schematic view illustrating an intermittent flushing coverage effect of a drying filter according to an embodiment of the present application;
fig. 7b is a schematic diagram showing a covering effect of continuous flushing of a drying screen according to an embodiment of the present application;
fig. 7c is a schematic diagram showing the coverage effect of intermittent rinsing and continuous rinsing of a drying filter according to an embodiment of the present application;
FIG. 8 is a graph showing the relationship between the current static pressure K and the power of a fan at a set rotation speed;
fig. 9 is a block diagram of steps of a method for controlling flushing of a filter screen before drying according to an embodiment of the present application.
In the figure:
21-an outer cylinder air outlet; 22-an air inlet of the outer cylinder; 23-an outer cylinder; 241-a filter screen; 242-spraying pieces; 2421-a shower section; 2422-a water jet; 2423-a water inlet section; 2424-a mounting rack; 25-sealing rings; 26-spraying a water inlet pipe;
3-an inner cylinder;
41-a first air duct; 42-a second air duct; 43-a drying fan assembly; 431-volute top cover; 432-volute lower cover; 44-a two-device assembly; 441-an evaporator; 442-a condenser; 443-two-part cassette; 444-two-part box cover;
71-a water inlet valve assembly; 715-third fill valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings.
Other advantages and advantages of the present application will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two, but does not exclude the case of at least one.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.
Example 1
In order to facilitate understanding of the laundry treatment apparatus provided by the embodiment of the present application, a heat pump system is additionally installed in the laundry treatment apparatus to provide a drying function.
As shown in fig. 1a, 1b and 2, the laundry treatment apparatus includes a casing (not shown in the drawings) and a laundry treatment tub disposed in the casing, and a drying blower assembly 43, a two-device assembly 44 and a connection air duct for the laundry treatment tub and the casing, the laundry treatment tub includes an inner tub 3 and an outer tub 23, the drying blower assembly 43, the two-device assembly 44 and the connection air duct are disposed above the outer tub 23, an outer tub air intake 22 and an outer tub air outlet 21 are disposed at the top of the outer tub 23, the drying blower assembly 43 and the two-device assembly 44 are connected between the outer tub air intake 22 and the outer tub air outlet 21, specifically, the outer tub air intake 22 is disposed on a front tub of the outer tub 23, the outer tub air outlet 21 is disposed on a rear tub of the outer tub, and the connection air duct includes a first air duct 41 and a second air duct 42; the first air duct 41 is used for being connected with the outer cylinder air outlet 21, and the second air duct 42 is used for being connected with the outer cylinder air inlet 22. The two-unit assembly 44 includes two units, i.e., an evaporator and a condenser, having a heat exchange chamber formed therein, and two units, i.e., the evaporator and the condenser, disposed within the heat exchange chamber, wherein the drying air flows through the two units to perform heat exchange with the evaporator and the condenser in sequence (the drying air is cooled by the evaporator to remove moisture when flowing through the evaporator and heated when flowing through the condenser); from this urceolus air outlet 21, first wind channel 41, stoving fan subassembly 43, two ware boxes, second wind channel 42 and urceolus air intake 22 sealing connection in proper order and intercommunication form the outside stoving wind channel of clothing processing equipment, and stoving wind channel forms the circulation flow path of stoving air with the clothing processing bucket, and under stoving fan subassembly 43 effect, the stoving air current flows along the circulation of stoving flow path, completes the heat exchange with evaporimeter, condenser in proper order when flowing through the heat exchange chamber, accomplishes the heat exchange with the clothing when flowing through urceolus 23 and realizes the stoving effect of clothing.
Further, referring to fig. 3, 4a, 4b, 5a, and 5b, the laundry treatment apparatus according to this embodiment further includes a filter screen 241, where the filter screen 241 is disposed in the drying air circulation path, and is used for filtering filings doped in the drying air in the drying path. The drying flow path is provided with a fan for driving the drying air to flow, and provides the flowing power of the drying air flow. Preferably, the filter screen is arranged at the air inlet end of the fan, namely at the air outlet 21 of the cylinder body, so that the filth in the drying air can be effectively filtered, and the filth is prevented from flowing into the two devices to influence heat exchange. The preferred screen forms a curved structure protruding toward the washing chamber of the outer tub 23 and is disposed at the outer tub air outlet 21 to facilitate space for retaining lint and to facilitate cleaning in a timely manner.
With continued reference to fig. 3, 4a, 4b, 5a, 5b, and fig. 6, the laundry treatment apparatus provided in this embodiment further includes a spray cleaning unit for cleaning the filter screen; the spray cleaning unit is provided with a spray inlet pipe 26, and the spray inlet pipe 26 is provided with a water inlet valve 71. The spray cleaning unit is provided with a spray device 24 with water jets directed towards the filter screen. Spray pieces 242 of the spray device are arranged above the filter screen 241, and water spray openings of the spray pieces 242 are configured to spray to the filter screen 241 in multiple directions in a divergent mode, so that the cleaning coverage surface is enlarged, cleaning is more thorough, and the condition that part of burrs are leaked to clean is avoided.
Further, as shown in fig. 5a/5b, the present application further discovers that when the filter screen is configured to be a curved surface structure protruding toward the drying air duct, the spraying member is obliquely disposed above the filter screen, and the spraying distance from the spraying surface of the spraying member to the filtering surface of the filter screen is gradually increased from top to bottom, which is more favorable for forming a larger area of overflow surface and a thinner water film on the filter screen, not only is favorable for cleaning the filter screen in a full-face coverage manner, but also is favorable for reducing evaporation and breaking time of the water film, greatly improving subsequent drying efficiency, reducing waiting time of users and improving customer experience.
Furthermore, the application further discovers that skillfully designing a plurality of spraying modes to adapt to different flushing requirements can have better flushing effect than a single flushing mode: firstly, unnecessary water waste and energy waste are prevented from being caused when the drying load is not large; secondly, excessive accumulated water of the filter screen and too thick water film caused by too large water spraying amount are avoided, so that the later drying efficiency is reduced and the drying time is prolonged. Therefore, the embodiment of the application provides a control device for realizing combination of intermittent flushing and continuous flushing of a filter screen, which can control a water inlet valve according to the cleaning requirement of the filter screen to realize a plurality of spraying modes including continuous spraying and intermittent spraying, and particularly can be operated in one mode or alternately operated in a plurality of modes according to the cleaning requirement of dirt blocking of the filter screen, wherein the intermittent flushing is to enable a water nozzle of the spraying device to intermittently spray flushing medium, and the continuous flushing is to enable the water nozzle of the spraying device to continuously spray the flushing medium.
As an alternative scheme of the control device for controlling the continuous flushing and the intermittent flushing of the water inlet, the control device for the embodiment can realize the continuous spraying and the intermittent spraying of the water jet by controlling the opening and closing time (the opening and closing degree can be further regulated) of the water inlet valve.
As shown in fig. 5a, 5b, 6, 7a, 7b, and 7c, the control device for cleaning the coverage effect of the drying filter screen in an intermittent flushing and continuous flushing manner by controlling the water jet of the spray cleaning unit during flushing of the drying filter screen according to the embodiment of the application. Fig. 3 is a schematic diagram of a coverage effect of intermittent flushing of a drying filter according to an embodiment of the present application; the intermittent flushing is that the spray inlet valve controls the water spraying port 2422 of the spraying device to intermittently spray flushing medium, at this time, an approximately parabolic overflow surface which continuously expands from bottom to top is formed on the filter screen surface of the filter screen 241, when the control device controls the spray inlet valve to continuously spray the flushing medium (such as water) through the water spraying port, the flushing medium is sprayed down to the middle area of the filter screen along parabola, so that the formation of a large-area water film of the filter screen is not caused, and the normal frequency of the compressor is quickly restored to perform subsequent drying procedures. Thus, when the filter screen is not seriously blocked, an intermittent spray washing mode can be adopted. However, when the filter screen is seriously blocked, especially when the local blocking is seriously blocked, a continuous spray washing mode can be adopted, and at the moment, the water flow pressure ratio is larger and the water flow rigidity is larger, so that the filter screen is favorable for quickly washing off the blocking. But as a high cost performance and high cost performance mode, when the filth blockage is not serious, an intermittent flushing and continuous flushing alternate operation mode can be adopted, so that the cleaning effect of the filter screen can be ensured, and the water film is prevented from being too thick, and unnecessary water source waste, energy waste and time waste (overlong drying time) are avoided.
Further preferably, referring to fig. 7a, the control device controls the water jet 2422 to jet the flushing medium at a single interval, such as 0.5 to 1 second, so that the sprayed flushing medium deviates from the original path due to insufficient water pressure, and sprays down along a parabola to the middle area of the filter screen 10 to facilitate the formation of a parabolic overflow surface of the filter surface. And the control device is also used for controlling the spraying device 21 to spray intermittent flushing for t1 time through the spraying water inlet valve, and the time t1 is between 1 and 5 seconds, so that one or more intermittent flushing is performed in the time t 1. With further reference to fig. 7b, fig. 4 is a schematic view illustrating a covering effect of continuous flushing of a drying screen according to an embodiment of the present application; the continuous flushing is to control the water jet of the spray device to continuously spray flushing medium by the spray water inlet valve. When the spray inlet valve controls the water jet of the spray device to continuously spray the flushing medium, the flushing medium washes the areas of the filter screen positioned at the two sides of the middle area and part of the middle area along the angle straight line of the water jet. The control device controls the spray water inlet valve to continuously supply water, so that the water spraying device sprays for t2 time to continuously wash. the time t2 is at least 5 seconds or more, and the spraying time is kept, so that continuous straight water flow is formed to flush two sides of the filter screen 10. Referring to fig. 7c together, fig. 7c is a schematic diagram illustrating a coverage effect of intermittent rinsing and continuous rinsing of a drying filter according to an embodiment of the present application; in order to flush the filter screen 10 in a full-face manner, the control device controls the spray cleaning unit to clean in an intermittent flushing and a continuous flushing manner through the spray water inlet valve, and alternately performs the intermittent flushing and the continuous flushing between the set flushing times t. In particular, the control device is also used to control the interval time t3 between intermittent flushing and continuous flushing. t3 is the control reaction time; at interval time t3, the continuously flushed water medium is used for impacting the two sides of the filter screen by utilizing the middle concave of the filter screen according to the impact position except the two sides and part of the middle area of the filter screen, and the sprayed water medium automatically flows downwards along the middle concave after impacting; after the interval time t3, the intermittently rinsed water medium is converged with the water medium flowing down, so that the filth on the filter screen 10 is deeply removed, and the ventilation effect of the filter screen is ensured.
Example 2
A specific washing control method embodiment is provided below taking the laundry treating apparatus described in embodiment 1 above as an example.
The general idea is as follows:
before or during the drying procedure, if the filter screen is monitored to be cleaned, an intermittent flushing mode or a continuous flushing mode is selected to operate according to the cleaning requirement or the filter screen is alternately cleaned according to a preset period;
the intermittent flushing mode is to control the intermittent opening and closing of the spray water inlet valve to realize intermittent spraying of flushing medium from a water nozzle of the spray device;
and the continuous flushing mode is to control the continuous opening of the spray water inlet valve to realize continuous spraying of flushing medium from a water nozzle of the spray device.
Specific:
(1) Before the drying process or after the drying process is performed for a set period, whether the filter screen needs to be washed and in which way is determined. The preferred dehydration distribution stage before drying in this embodiment before the drying process, in which the rinsing judgment is performed and the rinsing is performed, is beneficial to improving the drying efficiency and drying effect. Of course, it is conceivable to those skilled in the art that the washing stage before drying or the rinsing stage before drying or the shaking-off stage before drying may be performed. In any case, the washing procedure of the filter screen is performed by utilizing the stages before drying, which is beneficial to cleaning the filter screen, reducing the waiting time of subsequent drying and improving the drying effect.
(2) The judging that the filter screen needs to be cleaned comprises the following steps:
monitoring a current static pressure value K of a drying system;
the current static pressure value K and the initial static pressure value K 0 Comparing;
if the current static pressure value K is less than or equal to n K 0 Judging that the filter screen needs to be washed;
wherein n is a set multiple, K is 0 And setting an initial static pressure value of the drying system at the rotating speed of the drying fan.
Wherein, for the calculation of the current static pressure value K, the application provides an alternative embodiment:
that is, the current static pressure value K of the drying system is determined according to the functional relation between the static pressure value K and the rotating speed of the drying fan and the power of the drying fan, and the function comprises:
K＝aP+br+c............................(1)；
wherein: p is fan power, a is fan power coefficient, r is fan rotating speed, b is fan rotating speed coefficient, and c is constant;
it should be noted that, a, b, and c are based on a functional relationship of K, and the preferred values corresponding to the different set rotational speeds and set powers obtained by learning and training the neural network to make K approach to the actual measurement values of the corresponding wind tunnel test for the different set rotational speeds and set powers, so a, b, and c are not completely fixed constants, which are related to the selected fan set rotational speeds and fan set powers. When the fan is set to be unchanged in rotating speed, power and a, b and c are relatively unchanged; when the fan set rotation speed and the set power change, the corresponding a, b and c may not be the same.
Under the condition that the drying systems are the same, the fan set power and the set rotating speed are in one-to-one correspondence, and the set power value can be measured according to the operation of the drying fan in the drying systems at the corresponding set rotating speed. In practice, because the requirements of drying load and drying performance are different in different operation stages, the fan set rotating speed n meeting the drying work requirements in different drying stages is different. In addition, the actual power of the fan is changed due to the change of the load of the fan due to the blockage of a filter screen and the like in actual operation of the fan. In order to calculate the static pressure of the drying system more accurately according to the functional relation between the drying system and the rotating speed and the fan power of the drying fan, we surprisingly found that for a certain set rotating speed, the sectional calculation result of the K function by taking the set power corresponding to the set rotating speed as a demarcation point is more accurate. Of course, irrespective of the complexity of the program, in theory, we can set the functional relation between the static pressure value K of the drying system, the rotating speed of the drying fan and the power of the drying fan as more functions, so as to improve the accuracy of the calculation result of the model.
For example, the set rotation speed n of the drying fan is 4500RPM, the corresponding set power Po of the drying fan is 68W, which can be set by changing the primary function into a piecewise function with the set power 68W as a demarcation value under the condition of keeping the set rotation speed of the fan to 4500RPM unchanged, namely
(1)K 1 ＝a 1 P+b 1 r+c 1 (r=4500 rpm, p less than 68W);
(2)K 2 ＝a 2 P+b 2 r 2 +c 2； (r=4500 rpm, p is greater than or equal to 68W);
that is, if the drying fan is operated at the set rotation speed 4500RPM, if the current power P is less than 68W, K is utilized 1 ＝a 1 P+b 1 r+c 1 Function K1 is calculated, if the current power P is larger than 68W, K is adopted 2 ＝a 2 P+b 2 r 2 +c 2 The function is K2.
Then obtaining the corresponding piecewise function K through neural training and learning 1 A of (2) 1 、b 1 、c 1 Preference value sum K 2 A of (2) 2 、b 2 、c 2 Wherein a is 1 ＝-100/3，b 1 ＝0.5c 1 ＝383；a 2 ＝-100/9，b 2 ＝0.3c 2 -228; namely:
(1)K 1 -100/3 x p+0.5r+383 (r=4500rpm, p less than 68W);
(2)K 2 ＝-100/9*P+0.3r 2 +228 (r=4500 rpm, p greater than or equal to 68W);
thus, at a set rotational speed of 4500RPM and a set power of 68W, when the current fan power P is less than 68W, we can substitute the current fan power P into K 1 in Calculating the static pressure value of the drying system, and substituting the current fan power P into K when the current fan power P is larger than 68W 2 And (5) solving a static pressure value of the drying system. For example, when we set the rotation speed to 4500RPM and the current power meter to 70W, we obtain the static pressure value to 300pa.
Based on the calculation thought, a plurality of piecewise function curves corresponding to different set rotating speeds and set powers can be obtained, the curves are stored in the controller, and the corresponding piecewise function curves can be called for comparison during judgment. Thus, the corresponding piecewise function curve and the corresponding static pressure value of the drying system can be searched through the current rotating speed and power. The embodiment shown in FIG. 8 is a two-segment function obtained at a set speed of 4500RPM and a set power meter of 68W, where the horizontal axis represents static pressure and the vertical axis represents power. When we need to determine that the drying fan is currently running at the set rotation speed 4500RPM, we find the function curve of K corresponding to 4500RPM when the current power is 70W, as can be seen in fig. 8, at the set rotation speed 4500RPM, the current static pressure value of the drying system corresponding to the current power 70W is 300pa. Thus, the current static pressure value of the drying system can be determined as long as the current fan rotating speed and power are obtained. The problem that the actual static pressure of the drying system is difficult to measure, so that the filter screen flushing control by utilizing the static pressure value of the drying system is difficult to control is solved. In actual operation, the current static pressure value of the drying system can be determined by monitoring the power and the rotating speed of the fan through the monitoring device and is compared with the initial static pressure of the system, so that the condition of filter screen filth can be judged, the filter screen cleaning is actively and timely carried out, and the intellectualization of the filter screen cleaning is greatly improved.
As will be appreciated by those skilled in the art, K is static pressure, in pa, P is fan power, in w, r is fan speed, in RPM, so a is the fan power factor, pa/w is the fan speed factor, b is the fan speed factor, pa/RPM is the constant, and pa is the unit.
Compared with the method of directly determining the static pressure by using a pressure gauge, the method of determining the current static pressure value of the drying system comprehensively considers the influence of the rotating speed of the fan and the power of the fan, and can more accurately judge the filth blockage degree of the filter screen and more accurately control the flushing mode and the flushing time.
Thus, the current static pressure value of the drying system can be determined as long as the current fan rotating speed and power are obtained. Compared with the method of directly determining the static pressure by using a pressure gauge, the method of determining the current static pressure value of the drying system comprehensively considers the mutual influence of the rotating speed of the fan and the power of the fan and the water film, and can more accurately judge the filth blockage degree of the filter screen and more accurately control the flushing mode and the flushing time. In actual operation, the current static pressure value of the drying system can be determined by monitoring the power and the rotating speed of the fan through the monitoring device and is compared with the initial static pressure of the system, so that the condition of filter screen filth can be judged, the filter screen cleaning is actively and timely carried out, and the intellectualization of the filter screen cleaning is greatly improved.
(3) Regarding the determination and control of the total filter screen cleaning time t, there are two alternative embodiments provided by the present application;
first kind: fixed flush time = T; t is a fixed duration, a longer set time ensures that a better flushing effect is still achieved under the worst condition of the attachment of filter screen filings, but the duration of spraying cannot be accurately controlled, and when the attachment of the filter screen filings is lighter, the spraying is still carried out by the duration of T, so that waste of time and water resources is caused.
Second kind: calculated flush time = t; through the weight W of the last dried clothes and the drying time t o Calculation of t=a w ×t o ；a w The scaling factor corresponding to W. The weight ranges correspond to different grades W, each weight grade W corresponds to a different scale factor a w The required washing time t is calculated by acquiring the weight of clothes, acquiring the corresponding weight grade W and then by a relational expression of the drying time. The quantity of the filings generated in the drying process is positively related to the weight of the dried clothes and the drying time, so that the filings of the filter screen are judged through the last drying parameters, and the filter screen is washed in a planned way. Thereby saving the flushing time and reducing the using amount of flushing medium while guaranteeing the flushing effect of the filter screen.
The second mode is preferably adopted to calculate the total flushing time, and the first mode is adopted when the information of the last drying cannot be obtained.
Specifically, with respect to the control of the second total filter screen cleaning duration t, the present application provides an alternative embodiment comprising the steps of:
acquiring the last drying information;
calculating total filter screen cleaning time t=kW+at according to the weight W of the last dried clothes and the drying time t0 0 Wherein k is a set value, and the washing time length corresponds to the weight W of the dried clothes; a is a set value, and is a flushing time length and a drying time length t 0 Corresponding scaling factor.
It should be noted that, considering that the acquisition of the last drying information may be unsuccessful, it is also preferable in this embodiment to set a fixed flushing time period T if the acquisition of the last drying information is unsuccessful, and control the total cleaning time of the filter screen according to the fixed flushing time period, i.e., t=t.
(4) Selection and control of spray patterns
As a preferred embodiment of the present application, in order to facilitate control and to facilitate formation of a uniform thin water film, the duration of each cycle of the intermittent flushing is preset to a fixed time t2, such as at least 5 seconds or more, the total intermittent flushing time is preset to a fixed time t1, such as a time t1 of between 1 and 5 seconds, the on-off time and on-off frequency of the inlet valve are fixed, and the interval time between the intermittent flushing mode and the continuous flushing mode is preset to a fixed time t3. As an alternative embodiment, the spray control is as follows:
calculating the total time t for cleaning the filter screen, setting the execution time of the intermittent flushing mode as t1, and setting the execution time of the continuous flushing mode as t 2;
controlling the flushing mode according to the obtained relation between the total time t of cleaning the filter screen and the time t1 of executing the intermittent flushing mode and the time t2 of executing the continuous flushing mode:
if t is less than or equal to t1, only executing an intermittent flushing mode of t;
if t1 is less than t and less than t1+t2, executing an intermittent flushing mode of t1 and executing a continuous flushing mode of t-t 1;
if t is greater than or equal to t1+t2, the intermittent flushing mode of t1 and the continuous flushing mode of t2 are alternately executed periodically until the time t is reached, specifically, the interval time t3 between the intermittent flushing mode and the continuous flushing mode is set, the water inlet valve is controlled to keep closing for the interval time t3 after each intermittent flushing mode or continuous mode is executed, and then the next flushing mode is executed.
An example of a complete control flow based on the above embodiment is specifically described below with reference to fig. 9, and fig. 9 is a block diagram of a method for flushing a drying screen according to an embodiment of the present application. The washing method of the drying filter screen comprises the following steps:
step one, running a drying program;
step (a)2. Acquiring the weight W of the last dried clothes and the total drying time t o ；
Step three, judging whether to execute filter screen flushing, if yes, executing step four, otherwise, entering step six; judging whether to execute the filter screen flushing can be to cumulatively run the drying for a plurality of periods, remind the user when the user selects the drying program again, and the user selects whether to flush or not, or judge through the filter screen flushing judgment logic.
Step four, executing a filter screen flushing step:
a. opening a spray water inlet valve and intermittently flushing the water tank in a mode t 1 Closing after the time;
b. interval time t 3 After that, the spray water inlet valve is opened, and the continuous flushing mode t is adopted 2 Closing after the time;
step a is intermittent rinse control and step b is continuous rinse control, with individual and combined rinse effects as shown in fig. 7a, 7b, 7 c.
And step five, repeatedly executing the step four until the flushing time t is over, and entering the step six.
And step six, running a drying control program until the drying is finished.
In the above method, preferably, the intermittent flushing is that the control device controls the water jet 242 to spray the flushing medium at a frequency of single intermittent 0.5-1 second, so that the sprayed flushing medium deviates from the original path due to insufficient water pressure, and sprays down along a parabola to the middle area of the filter screen to form a parabolic flow-through area. And the control device is used for controlling the spraying device 21 to spray intermittent flushing for t1 time through the spraying water inlet valve, and the time t1 is between 1 and 5 seconds, so that one or more intermittent flushing is performed in the time t 1.
The continuous flushing is that the control device continuously supplies water by controlling the spray water inlet valve, so that the water spraying device sprays for t2 time for continuous flushing. the time t2 is at least 5 seconds or more, and the spraying time is kept, so that continuous straight water flow is formed to flush two sides of the filter screen.
The intermittent flushing and the continuous flushing are that the control device controls the spray water inlet valve to intermittently supply water at a set frequency, the intermittent water supply is stopped after the intermittent water supply is carried out for t1 time, the continuous flushing is started after the interval time t3, the continuous flushing is stopped after the interval time t2, and the intermittent flushing is started after the interval time t3.
In the embodiment of the application, only 1 intermittent flushing and 1 continuous flushing are performed, and then periodic circulation is performed; of course, the intermittent flushing may be performed for 1 longer time after the intermittent flushing, and the interval time t3 is negligible.
The washing method of the drying filter screen adopted by the clothes treatment equipment provided by the embodiment of the application enables the drying air in the drying air duct to circulate smoothly, and has the advantages of low energy consumption, high drying efficiency, good drying effect and good customer experience.
The foregoing is merely illustrative embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present application, and the application should be covered. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (11)
1. A laundry treating apparatus with a drying function, characterized in that: the device comprises a cylinder body, a drying air duct, a filter screen, a spray cleaning unit and a control device; wherein,,
the drying air duct and the cylinder form a drying air circulation flow path for drying air;
the filter screen is arranged in the drying air circulation flow path and is used for filtering drying air;
the spray cleaning unit comprises a spray device for spraying the filter screen, and the spray device comprises a plurality of water spraying ports facing different areas of the filter screen;
the clothes treatment device is provided with a plurality of spraying modes, wherein the spraying modes comprise continuous spraying and intermittent spraying;
the multiple spraying modes can be controlled to operate in one mode or alternately operate in multiple modes according to the filter screen dirt blocking requirements;
the filter screen is arranged at the air outlet of the cylinder body and is of a curved surface structure protruding to the drying air duct;
the spraying device comprises a spraying piece, the spraying piece is arranged above the filter screen, the water spraying port forms a spraying surface which is inclined upwards towards the upper part of the filter screen, and the spraying distance from the spraying surface to the filter screen filtering surface is gradually increased from top to bottom; the intermittent spraying forms an approximate parabolic overflow surface which continuously expands from top to bottom on the filtering surface of the filter screen;
the continuous spray is controlled to form an approximately rectangular flow surface on the face of the screen, the approximately parabolic flow surface and the approximately rectangular flow surface overlapping to cover the filtration area of the filter face of the entire screen.
2. The laundry treatment apparatus according to claim 1, wherein the spray device is provided with a water inlet valve for controlling a spray pattern of the spray device; the water spraying port is controlled by the water inlet valve to realize continuous spraying and intermittent spraying, wherein the intermittent spraying is to enable the water spraying port of the spraying device to intermittently spray flushing medium, and the continuous spraying is to enable the water spraying port of the spraying device to continuously spray flushing medium.
3. A control method for a dry filter washing of a laundry treatment apparatus according to any one of claims 1-2, characterized in that, before or during the drying process, if it is monitored that the filter needs to be cleaned, the filter is cleaned by selecting an intermittent washing mode or a continuous washing mode or both according to the cleaning need, alternately according to a preset cycle.
4. A control method for flushing a dry filter screen according to claim 3, wherein the intermittent flushing mode is performed for a time t1, the continuous flushing mode is performed for a time t2, and the intermittent flushing mode or the continuous flushing mode is selected to operate according to cleaning requirements or the intermittent flushing mode or the continuous flushing mode is performed for alternately cleaning the filter screen according to a preset period, and the control method comprises the following steps:
obtaining the total cleaning time of the filter screen as t;
if t is less than or equal to t1, only executing an intermittent flushing mode of t;
if t1 is less than t and less than t1+t2, executing an intermittent flushing mode of t1 and executing a continuous flushing mode of t-t 1;
if t is more than or equal to t1+t2, the intermittent flushing mode of t1 and the continuous flushing mode of t2 are alternately executed periodically until the total filter screen cleaning time t is reached.
5. The method of claim 4, wherein the selecting intermittent flushing mode or continuous flushing mode operation or both to alternately clean the screen according to a preset cycle according to cleaning requirements further comprises the steps of:
and controlling to set the interval time t3 between the intermittent flushing mode and the continuous flushing mode, and controlling the water inlet valve to keep closing for the interval time t3 after each intermittent flushing mode or continuous flushing mode is executed, and then carrying out the next flushing mode.
6. The method of claim 5, wherein the step of obtaining a total screen cleaning time t comprises:
acquiring the last drying information;
calculating total filter screen cleaning time t=kW+at 0 according to the last drying clothes weight W and drying time t0, wherein k is a set value, and the ratio system of the washing time to the drying clothes weight W is set; a is a set value, and is a proportional coefficient corresponding to the flushing time length and the drying time length t 0.
7. The method for controlling flushing of a dry filter screen according to claim 6, wherein,
if the last drying information is not successfully obtained, a fixed flushing time length T is set, and the total cleaning time of the filter screen is t=T.
8. The method for controlling flushing of a dry filter according to claim 3, wherein the monitoring of the condition for determining that the filter needs to be cleaned comprises: and after the drying program executes a set period, judging that the filter screen needs to be washed.
9. The method of claim 8, wherein the drying program is executed for a set period followed by a dehydration profile phase prior to drying.
10. The method for controlling flushing of a dry filter according to any one of claims 3 to 9, wherein the monitoring of the condition for determining that the filter needs to be cleaned comprises: monitoring a current static pressure value K of a drying system; the current static pressure value K and the initial static pressure value K 0 Comparing;
if the current static pressure value K is less than or equal to n K 0 Judging that the filter screen needs to be washed;
wherein n is a set multiple, K is 0 And setting an initial static pressure value of the drying system when the rotating speed of the drying fan is set.
11. The control method of dry screen flushing according to claim 10, wherein the current static pressure value K is determined based on a functional relationship with a current dry fan rotational speed, a current dry fan power, the functional relationship comprising:
K 1 =a 1 P+b 1 r+c 1 ............................(1)；
wherein: p is fan power, r is fan rotating speed; a, a 1 B is the power coefficient of the fan 1 C is the rotation speed coefficient of the fan 1 Is constant.
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