CN114182514A - Drying filter screen washing control method and heat pump washing machine - Google Patents

Drying filter screen washing control method and heat pump washing machine Download PDF

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Publication number
CN114182514A
CN114182514A CN202111448370.8A CN202111448370A CN114182514A CN 114182514 A CN114182514 A CN 114182514A CN 202111448370 A CN202111448370 A CN 202111448370A CN 114182514 A CN114182514 A CN 114182514A
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China
Prior art keywords
drying
filter screen
compressor
power
fan
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Granted
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CN202111448370.8A
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Chinese (zh)
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CN114182514B (en
Inventor
司富美
林帆
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN202111448370.8A priority Critical patent/CN114182514B/en
Publication of CN114182514A publication Critical patent/CN114182514A/en
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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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • 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
    • D06F2103/38—Time, e.g. duration
    • 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
    • D06F2103/42—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to filters or pumps
    • 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
    • D06F2105/30—Blowers
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

The invention provides a drying filter screen washing control method and a heat pump washing machine, and drying operation parameters are adjusted through the relation between the power variation and a set value within set time; whether the filter screen is washed can be intelligently judged in the drying process according to the fan power and the relation between the operated time and the total operating time, the filter screen is timely and automatically washed, and the intelligent recognition and intelligent cleaning effects are achieved. Furthermore, the drying fan and the compressor of the drying system are controlled after the washing process is finished, so that energy is saved, the influence of the washing process on the subsequent drying operation is reduced, a user does not need to wait for a long time to finish the drying process, the drying effect is integrally improved, and the user experience is improved.

Description

Drying filter screen washing control method and heat pump washing machine
Technical Field
The present disclosure relates to drying devices, and particularly to a drying filter screen washing device, a control method thereof, and a washing machine having a heat pump drying function.
Background
Circulation wind formula drying device, the clothing stoving in-process is along with the production of flock, for avoiding the flock to block up the stoving wind channel, toward can installing the filtration unit in fan air inlet department, the filter screen can effectively filter the flock in the stoving circulation wind. If the flock in the filter screen is accumulated to a certain degree and is not cleaned in time, the circulation air circulation is influenced, so that the drying efficiency is reduced.
Disclosure of Invention
The application provides a drying filter screen washing control method and a heat pump washing machine, which can intelligently judge the accumulated condition of flock in a filter screen, automatically wash the filter screen in time and achieve the effects of intelligent identification and intelligent cleaning.
As a first embodiment provided by the present invention, a control method for completing washing of a drying filter screen in a drying operation is provided, where the drying filter screen is used to filter a drying airflow of a drying system of a washing machine, the drying airflow is powered by a drying fan, the filter screen is cleaned by a spraying manner, after the washing of the drying filter screen is completed in the drying operation, a rotation speed of the drying fan is increased to a preset rotation speed, and then it is determined whether an increase value of a power of the drying fan within a set time reaches a set value, and only when the power of the drying fan reaches the set value, a frequency of a compressor is increased, so that the compressor is restored to the set frequency of a current drying stage to continue to operate the drying system until a drying program is completed.
As embodiment 2 provided by the present invention, the first embodiment is further optimized, which specifically comprises the following steps:
s61, increasing the rotating speed of the drying fan to the first set rotating speed;
s62, detecting the power of the drying fan in real time at the first set rotating speed of the drying fan and calculating the power rise value delta P of each m timen，ΔPn＝(Pn+m-Pn) M according to Δ PnThe selection is carried out as follows:
when Δ PnWhen the value is more than or equal to the delta Po, executing the step S71; otherwiseStep S72 is executed;
s71 according to Δ PnIncreasing the frequency of the compressor until the frequency of the compressor is adjusted to the set frequency corresponding to the current drying stage, and performing S8;
s72, maintaining the current frequency operation of the compressor and continuously judging the power of the drying fan; when the power of the drying fan is attenuated to cP0When the following, the step S73 is executed; otherwise, returning to the step of S61 to continue executing S61-S62;
s73, controlling the drying system to pause;
and S8, continuing to operate the drying system until the drying program is finished.
Further alternative embodiment 3, said step S71 being according to Δ PnAnd increasing the frequency of the compressor comprises controlling the frequency of the compressor to be up step by step, and returning to execute the step S62 every time the frequency of the compressor is increased by one step until the frequency of the compressor is adjusted to the set frequency corresponding to the current drying stage, and executing the step S8.
In a further alternative embodiment 4, the step of washing the filter screen before the step of S61 includes:
s51, reducing the rotation speed of the drying fan and the frequency of the compressor, and enabling the drying fan to operate at a second rotation speed and the compressor to operate at a second frequency;
and S52, washing the filter screen until the washing is finished.
Further optional embodiment 5, before the step of S51, the method further includes the following step of drying, washing and judging the filter screen:
s1, running a drying program to enable the drying fan to run at a set rotating speed and the compressor frequency to run at a set power, and obtaining the initial power P of the drying fan0Presetting total drying time t0And timing the running time t of the compressor;
s2, controlling the drying fan to operate at a first set rotating speed after the drying system operates for a preset time T;
s3, detecting the power P of the drying fan in real time at the first rotating speed of the drying fan and comparing the power P with the initial power P0Comparing, when the power of the drying fan is attenuated to aP0P ≦ aP0If so, executing a drying time length judging step S4, otherwise, continuing to execute a step S3;
s4, judging the actual operation time t of the compressor of the drying system and the preset total drying time t0When t is less than or equal to bt0If so, executing a filter screen washing control S5 step, otherwise, returning to the S3 step to continue judging;
s5, executing filter screen washing control;
in the step S3, a is a power attenuation coefficient affecting the normal operation of the drying system, and in the step S3, b is a drying duration coefficient.
In a further alternative embodiment 6, in the step S3, if P is detected>aP0If so, returning to the step of S3 to continue detection; in the step S4, if t is the same as>bt0Otherwise, the process returns to step S3 to continue the detection.
Further optional example 7, wherein b is 15-20%, a is 80-85%, and T is 10-15 minutes.
In a further alternative embodiment 8, the step S4, in which the drying program is operated, is a single drying mode.
Further optional embodiment 9, a control apparatus of a heat pump laundry treatment apparatus comprising one or more processors and a non-transitory computer readable storage medium storing program instructions, the one or more processors being configured to implement the method according to any one of embodiments 1-8 when the program instructions are executed by the one or more processors.
A second invention provided by the present invention is a control apparatus of a heat pump type laundry processing apparatus, comprising one or more processors and a non-transitory computer-readable storage medium storing program instructions, the one or more processors being configured to implement the method according to any one of embodiments 1-8 when the one or more processors execute the program instructions.
The present invention also provides a non-transitory computer-readable storage medium having stored thereon program instructions which, when executed by one or more processors, are configured to implement the method according to any one of embodiments 1-8.
The present invention also provides a heat pump laundry treating apparatus characterized in that it employs the method of any one of embodiments 1-8, or comprises the control apparatus of embodiment 9, or has the non-transitory computer-readable storage medium according to embodiment 10.
The present invention also provides a heat pump type laundry treating apparatus according to embodiment 11, provided with a drying system including: the device comprises a heat pump system, a drying fan, a drying air duct, a drying filter screen and a spraying cleaning unit;
the drying air channel is communicated with a space for forming air circulation and circulation between the air inlet and the air outlet of the roller and is used for the circulation of drying air;
the drying fan is arranged in the drying air channel and provides circulating power for drying air;
the drying filter screen is arranged at the air outlet of the roller or in the drying air channel and is used for filtering drying air;
the filter screen cleaning unit is a spraying device with a water inlet valve and is used for cleaning the filter screen;
the control device includes:
the detection unit is used for acquiring parameter information of the drying system, wherein the parameter information comprises rotating speed information of the drying fan, power information of the drying fan and frequency information of the compressor;
the storage unit is used for storing set parameters of the drying system, and the set parameters comprise set rotating speed information of the drying fan, set power information of the drying fan, set frequency information of the compressor and drying time length information at different drying stages;
the timing unit is used for timing the operation time of the drying system and the washing time of the filter screen;
and the processing unit is used for calculating, analyzing and processing according to the information of the detection unit, the storage unit and the timing unit.
The invention controls the drying fan and the compressor of the drying system after the washing process is finished, not only can save energy, but also reduces the influence of the washing process on the subsequent drying operation, and does not need a client to wait for a long time to finish the drying process, thereby integrally improving the drying effect and improving the client experience. In addition, in the judgment before re-flushing, the drying operation parameters are adjusted according to the relationship between the power change amount in the set time and the set value; whether the filter screen is washed and can intelligently judge the accumulated condition of the flock in the filter screen in the drying process or not is judged according to the fan power and the relation between the running time and the total running time, the filter screen is timely and automatically washed, and the intelligent recognition and intelligent cleaning effects are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 is to be understood that the drawings in the following description are merely exemplary and that other embodiments may be derived by those skilled in the art without inventive step from the drawings provided.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modifications, changes in the ratio relationships, or adjustments of the sizes, should fall within the scope of the present invention without affecting the functions and the achievable purposes of the present invention.
FIG. 1a is a schematic structural diagram of an embodiment of a laundry processing apparatus (drying system exploded) according to the present invention;
FIG. 1b is a schematic structural diagram of an embodiment of a clothes treating apparatus (drying system assembled together) provided by the present invention;
FIG. 2 is a schematic structural view of an embodiment of a clothes treating apparatus (an outer tub and a spraying device are assembled together) provided by the present invention;
FIG. 3 is a schematic structural view of an embodiment of a screen and a spraying device provided in the present invention;
FIG. 4a is a schematic top view of an embodiment of a screen and a spray element according to the present invention;
FIG. 4b is a schematic structural diagram of a filter screen and a spraying member according to an embodiment of the present invention;
FIG. 5a is a schematic structural view of an embodiment of a positional relationship between a filter screen and a spray member according to the present invention;
FIG. 5B is a schematic structural diagram 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 provided by the present invention in a spray region of a filter screen;
fig. 7 is a flowchart of a method for controlling a screen washing in drying according to an embodiment of the present disclosure;
in the figure:
21-outer cylinder air outlet; 22-an air inlet of the outer cylinder; 23-an outer barrel; 241-a filter screen; 242-spraying member; 2421-a spraying part; 2422-water spray nozzle; 2423, water inlet part; 2424-a mounting bracket; 25-a sealing ring; 26-spraying water inlet pipe;
3-inner cylinder;
41-a first air duct; 42-a second air duct; 43-drying fan assembly; 431-volute upper cover; 432-volute lower cover; 44-a two-device assembly; 441-an evaporator; 442-a condenser; 443-two-container box; 444-two-container lid;
71-a water inlet valve assembly; 715-third water inlet valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings.
Other advantages and features of the present invention will become readily apparent to those skilled in the art from the following detailed description, wherein it is to be understood that the invention is not limited to the specific embodiments disclosed, but is to be construed as limited only by the appended claims. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude the inclusion of at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good 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 good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in a commodity or system that includes the element.
Example 1
In order to facilitate understanding of the clothes treatment equipment provided by the embodiment of the application, a heat pump system is additionally arranged in the clothes treatment equipment, so that a drying effect is provided.
As shown in fig. 1a, 1b and 2, the clothes treating apparatus includes a casing (not shown in the drawings) and a clothes treating barrel disposed in the casing, and a drying fan assembly 43, a two-device assembly 44 and a connecting air duct between the clothes treating barrel and the casing, the clothes treating barrel includes an inner barrel 3 and an outer barrel 23, the drying fan assembly 43, the two-device assembly 44 and the connecting air duct are disposed above the outer barrel 23, the top of the outer barrel 23 is provided with an outer barrel air inlet 22 and an outer barrel air outlet 21, the drying fan assembly 43, the two-device assembly 44 are connected between the outer barrel air inlet 22 and the outer barrel air outlet 21, specifically, the outer barrel air inlet 22 is disposed on a front barrel of the outer barrel 23, the outer barrel air outlet 21 is disposed on a rear barrel of the outer barrel, and the connecting 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-device assembly 44 includes two device boxes forming a heat exchange cavity and two devices, namely an evaporator and a condenser, arranged in the heat exchange cavity, and when the drying air flow passes through the two device boxes, the drying air flow completes heat exchange with the evaporator and the condenser in the heat exchange cavity in sequence (the drying air is cooled by the evaporator to remove moisture when passing through the evaporator and is heated when passing through the condenser); the outer barrel air outlet 21, the first air duct 41, the drying fan assembly 43, the two-device box, the second air duct 42 and the outer barrel air inlet 22 are sequentially connected in a sealing manner and communicated to form an external drying air duct of the clothes treatment equipment, the drying air duct and the clothes treatment barrel form a drying air circulation flow path, under the action of the drying fan assembly 43, drying air flows circularly along the drying flow path, heat exchange is successively completed with the evaporator and the condenser when flowing through the heat exchange cavity, and heat exchange is completed with clothes when flowing through the outer barrel 23, so that the drying effect of the clothes is realized.
Further, with reference to fig. 3, 4a, 4b, 5a, and 5b, the laundry processing apparatus provided in this embodiment further includes a filter screen 241, and the filter screen 241 is disposed in the drying air circulation flow path and is used for filtering the lint mixed in the drying air in the drying flow path. And a drying fan for driving drying air to flow is arranged on the drying flow path to provide flowing power of drying air flow. Preferably, the filter screen is installed at the air inlet end of drying fan, also is barrel air outlet 21 to can effectively filter the flock in the drying air, avoid it to flow into two wares and influence the heat transfer. The preferred curved surface structure of the filter screen forming the washing cavity protruding to the outer cylinder 23 is arranged at the outer cylinder air outlet 21 to facilitate the space for storing the flock and facilitate timely cleaning.
With continuing reference to fig. 3, 4a, 4b, 5a, 5b and 6, the clothes treating apparatus provided in this embodiment further includes a spray cleaning unit for cleaning the filter screen; the spraying cleaning unit is provided with a spraying water inlet pipe 26, and the spraying water inlet pipe 26 is provided with a water inlet valve 71. The spraying cleaning unit is provided with a spraying device 24 with a water spraying opening facing the filter screen. The spraying piece 242 of the spraying device is arranged above the filter screen 241, and the water spraying opening of the spraying piece 242 is constructed to spray to the filter screen 241 in a divergent multi-direction mode so as to enlarge the cleaning covering surface, so that the cleaning is more thorough, and the condition that part of the flocks are leaked to be cleaned is avoided.
Furthermore, the present invention further finds that, as shown in fig. 5a/5b, when the filter screen is configured as a curved surface structure protruding toward the washing cavity of the cylinder, the spraying member is obliquely arranged 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 beneficial to forming a larger-area flow surface and a thinner water film on the filter screen, not only beneficial to performing overall covering type cleaning on the filter screen, but also beneficial to reducing the evaporation and crushing time of the water film, so as to greatly improve the subsequent drying efficiency, reduce the waiting time of a user, and improve the customer experience.
Furthermore, the invention also finds that skillfully designing a plurality of spraying modes to adapt to different washing requirements has better washing effect than a single washing mode: firstly, unnecessary water waste and energy waste caused by a small drying load are prevented; secondly, avoid because the water spray volume is too big to lead to the filter screen ponding too much and the water film is too thick, cause later stage drying efficiency to reduce and drying time extension. Therefore, the embodiment of the application provides a control device for realizing intermittent washing and continuous washing of a filter screen, the control device can control a water inlet valve to realize multiple spraying modes including continuous spraying and intermittent spraying according to the cleaning requirement of the filter screen, and specific control can be operated in one mode or alternatively operated in multiple modes according to the cleaning requirement of dirty and blocked filter screen, wherein the intermittent washing is to enable a water outlet of the spraying device to intermittently spray a washing medium, and the continuous washing is to enable the water outlet of the spraying device to continuously spray the washing medium.
As an optional scheme for controlling the continuous flushing and the intermittent flushing of the water inlet by the control device in this embodiment, the control device in this embodiment can realize the continuous spraying and the intermittent spraying of the water outlet by controlling the opening and closing time (or further adjusting the opening and closing degree) of the water inlet valve.
As shown in fig. 5a, 5b and 6, the control device for washing the drying screen according to the embodiment of the present application is a schematic diagram of the covering effect of washing the drying screen by controlling the water spraying ports of the spray washing unit to intermittently wash and continuously wash. Fig. 3 is a schematic diagram illustrating a coverage effect of intermittent washing of a drying filter screen according to an embodiment of the present application; the intermittent washing is that the water spray port 2422 of the spray device is controlled by the spray water inlet valve to intermittently spray washing media, at the moment, an approximately parabolic overflowing surface which is continuously expanded from bottom to bottom is formed on the filter screen surface of the filter screen 241, and when the control device controls the spray water inlet valve to enable the water spray port to continuously spray the washing media (such as water), the washing media are sprayed to the middle area of the filter screen along a parabola, so that a large-area water film of the filter screen is not formed, and the normal frequency of the compressor can be quickly restored to perform subsequent drying procedures. Thus, when the filter screen is not seriously clogged, an intermittent spray washing mode can be adopted. However, when the filth blockage of the filter screen is serious, especially when the local filth blockage is serious and obvious, a continuous spray washing mode can be adopted, and at the moment, the water flow pressure ratio is higher and the water flow rigidity is higher, so that the filth blockage can be quickly washed away. However, as a mode with high cost performance and cost performance, when filth blockage is not serious, an intermittent washing and continuous washing alternate operation mode can be adopted, so that the cleaning effect of the filter screen can be ensured, and the excessive thickness of a water film and unnecessary water source waste, energy waste and time waste (overlong drying time) can be prevented.
Further preferably, the control device controls the water jet 2422 to jet the flushing medium at a frequency of 0.5 to 1 second in a single intermittent manner, so that the jetted flushing medium deviates from the original path due to insufficient water pressure and is sprayed downwards to the middle area of the filter screen 10 along the parabola, which is favorable for forming the parabolic overflow surface of the filter surface. And the control device is also used for controlling the intermittent flushing of the spraying device 21 at the time of spraying t1 through the spraying water inlet valve, wherein the time of t1 is 1-5 seconds, so that one or more times of intermittent flushing are carried out within the time of t 1. Fig. 4 is a schematic view illustrating a covering effect of continuous washing of a drying screen according to an embodiment of the present application; the continuous flushing is that the water spray nozzle of the spray inlet valve control spray device continuously sprays flushing medium. When the spraying water inlet valve controls the water spraying port of the spraying device to continuously spray the washing medium, the washing 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 spraying port. The control device controls the spraying water inlet valve to continuously supply water, so that the spraying device sprays t2 for continuous time for flushing. the time t2 is at least 5 seconds or more, and the spraying time is continued, so that continuous straight water flow is formed to wash the two sides of the filter screen 10. In order to fully and thoroughly wash the filter screen 10, the control device controls the spray washing unit to wash in an intermittent washing mode and a continuous washing mode through the spray water inlet valve, and the intermittent washing mode and the continuous washing mode are alternately carried out between the set washing time t. In particular, the control device is also used for controlling the interval time t3 between the intermittent flushing and the continuous flushing. t3 is control reaction time; at interval time t3, according to the impact position, the continuously washed aqueous medium is the two sides of the middle area and part of the middle area of the filter screen, the middle of the filter screen is sunken, so that the sprayed aqueous medium impacts the two sides of the filter screen, and the aqueous medium flows downwards along the middle sunken part after impact; after a time interval t3, intermittently rinsing with an aqueous medium
The water medium that flows down from the rivers converges mutually, carries out the degree of depth to cleaing away the flock on the filter screen 10, guarantees the ventilation effect of filter screen.
Example 2
Inside installing circulated air formula drying device additional of present heat pump washing machine, the clothing stoving in-process is along with the production of flock, can block up the filter screen often, influences the flow of wind and influences the stoving effect of evaporimeter and condenser, often needs the stoving filter screen to wash for this reason in the stoving operation, holds in total and washes what, how to resume drying system's the very big influence of operation drying efficiency, stoving energy consumption and customer experience after washing. Therefore, the invention has the innovative discovery that after the drying filter screen is washed in the drying operation, the rotating speed of the drying fan is firstly increased to the preset rotating speed, then whether the rising value of the power of the drying fan in the set time reaches the set value is judged, and the frequency of the compressor is increased only when the power of the drying fan reaches the set value, so that the drying fan returns to the set frequency of the current drying stage to continuously operate the drying system until the drying program is finished. Will very big promotion drying efficiency, stoving energy consumption and customer experience.
Specifically, the control method provided by the embodiment after the drying filter screen is washed in the drying operation basically comprises the following steps:
s61, increasing the rotating speed of the drying fan to the first set rotating speed;
s62, detecting the power of the drying fan in real time at the first set rotating speed of the drying fan and calculating the power rise value delta P of each m timen，ΔPn＝(Pn+m-Pn) M according to Δ PnThe selection is carried out as follows:
when Δ PnWhen the value is more than or equal to the delta Po, executing the step S71; otherwise, executing step S72;
s71 according to Δ PnIncreasing the frequency of the compressor until the frequency of the compressor is adjusted to the set frequency corresponding to the current drying stage, and performing S8;
s72, maintaining the current frequency operation of the compressor and continuously judging the power of the drying fan; when the power of the drying fan is attenuated to cP0When the following, the step S73 is executed; otherwise, returning to the step of S61 to continue executing S61-S62;
s73, controlling the drying system to pause;
and S8, continuing to operate the drying system until the drying program is finished.
The following is a specific embodiment of the present invention in connection with a washing control process, but it will be understood by those skilled in the art that the control method of the present invention after washing the filter screen is not limited to the washing control method of the following examples:
the general idea is as follows:
a control method for washing a drying filter screen, wherein the drying filter screen is used for filtering drying air flow of a drying system of a washing machine, the drying air flow is powered by a drying fan, the cleaning of the filter screen adopts a spraying mode for washing, and when the washing machine runs a drying procedure, the control method comprises the following control steps:
s1, running a drying program to enable the drying fan to run at a set rotating speed and the compressor frequency to run at a set power, and obtaining the initial power P of the drying fan0Presetting total drying time t0And timing the running time t of the compressor;
s2, controlling the drying fan to operate at a first set rotating speed after the drying system operates for a preset time T;
s3, detecting the power P of the drying fan in real time at the first rotating speed of the drying fan and comparing the power P with the initial power P0Comparing, when the power of the drying fan is attenuated to aP0P ≦ aP0If so, executing a drying time length judging step S4, otherwise, continuing to execute a step S3;
s4, judging the actual operation time t of the compressor of the drying system and the preset total drying time t0When t is less than or equal to bt0If so, executing a step of executing filter screen washing control S5, otherwise, returning to the step S3 to continue judging;
s5, executing filter screen washing control until washing is finished;
s61, increasing the rotating speed of the drying fan to the first set rotating speed;
s62, detecting the power of the drying fan in real time at the first set rotating speed of the drying fan and calculating the power rise value delta P of each m timen，ΔPn＝(Pn+m-Pn) M according to Δ PnThe selection is carried out as follows:
when Δ PnWhen the value is more than or equal to the delta Po, executing the step S71; otherwise, executing step S72;
s71 according to Δ PnIncreasing the frequency of the compressor until the frequency of the compressor is adjusted to the set frequency corresponding to the current drying stage, and performing S8;
s72, maintaining the current frequency operation of the compressor and continuously judging the power of the drying fan; when the power of the drying fan is attenuated to cP0When the following, the step S73 is executed; otherwise, returning to the step of S61 to continue executing S61-S62;
s73, controlling the drying system to pause;
and S8, continuing to operate the drying system until the drying program is finished.
Specifically, the method comprises the following steps:
(1) and step S1: running the drying program to make the drying fanOperating at a set rotating speed, operating the compressor at a set power at a compressor frequency, and acquiring the initial power P of the drying fan0Presetting total drying time t0And timing the running time t of the compressor;
in order to ensure the normal operation and the operation effect of the drying program, the filter screen washing program can judge whether the filter screen needs to be washed and cleaned in any mode before the drying program or in the drying program. But the problem is how to make the filter screen washing program reduce the waiting time of the subsequent drying and improve the drying effect. The embodiment that this application provided is that the user uses this clothing processing apparatus to carry out clothing drying process, carries out the filter screen washing control program in the stoving procedure under the single stoving mode of selection.
When the drying system is started, the initial parameters of the drying system run with set parameters, for example, the fan runs at a set rotating speed, the compressor runs at a set frequency, the initial power of the fan is the power detected when the fan runs at the set rotating speed under the condition that the drying filter screen is not dirty and blocked. Along with the aggravation of the filter screen filth blockage situation, the fan power is gradually reduced, so that the filth blockage situation of the filter screen can be judged by comparing the relation between the real-time power and the initial power.
In addition, the total drying time t is preset0The method for acquiring the clothes drying time is common in the field of clothes drying, generally, according to specific time-consuming data of clothes drying in different weight grades, the set values which are matched and correspond to the clothes drying time in different weight grades in one-to-one mode can roughly reflect actual drying time of the clothes in the corresponding weight grades, and the method for acquiring the clothes drying time can be used for presetting the total drying time t0The calculation of (c) does not exclude the use of prior art techniques.
(2) And S2, controlling the drying fan to operate at a first set rotating speed after the drying system operates for a preset T time, namely, considering that the temperature fluctuation in the drum is large in the drying starting and temperature rising process and influences the judgment of the fan power, selecting the drying system to operate after the drying operation is stable for a period of time, wherein the T time is the time from the drying operation to the drying system stabilization, and the preferable T is 10-15 minutes.
The first set rotating speed of the drying fan at this time can be greater than or equal to or less than the set parameter when the drying system is started.
(3) S3, detecting the power P of the drying fan in real time at the first rotating speed of the drying fan and the initial power P0Comparing, when the power of the drying fan is attenuated to aP0P ≦ aP0If so, the drying time period judging step S4 is performed, otherwise (P)>aP0Time) continues to execute the step S3;
(4) s4, judging the actual operation time t of the drying system compressor and the preset total drying time t0When t is less than or equal to bt0Then the step of executing screen flushing control S5 is executed, otherwise (i.e. t)>bt0) Returning to the step S3 to continue the determination; in step S4, a is a power attenuation coefficient that affects normal operation of the drying system, and at this time, the resistance of the drying air duct is large, which affects the air volume, and a is typically 80-85%.
(5) Executing filter screen washing control in the step of S5;
the method comprises the following steps:
s51, reducing the rotation speed of the drying fan and the frequency of the compressor, and enabling the drying fan to operate at a second rotation speed and the compressor to operate at a second frequency;
and S52, washing the filter screen until the washing is finished.
Specifically, the filter screen can be washed by controlling the opening and closing of a water inlet valve of a filter screen spraying device in a time sequence of starting the filter screen for A seconds and stopping the filter screen for B seconds, and the time sequence lasts for 10 cycles; the screen washing method is not limited, and the dried screen may be washed in any manner using water as a medium.
The flushing method of example 1 above can be adopted.
In order to avoid the filter screen from being washed, the washing water enters the air duct system to cause irreversible damage to the drying system, the drying fan needs to be set to operate at a lower rotating speed, and meanwhile, the compressor is set to operate at a lower frequency for matching the current air quantity. To this end, we prefer to reduce the dryer fan speed and compressor frequency when performing the rinse sequence so that the dryer fan operates at the second speed and the compressor operates at the second frequency.
(6) And the steps S6 to S7 are the subsequent operation procedures for ensuring the drying effect after the filter screen washing in the step S5 is finished.
The method comprises the following steps:
s61, increasing the rotating speed of the drying fan to the first set rotating speed;
s62, detecting the power of the drying fan in real time at the first set rotating speed of the drying fan and calculating the power rise value delta P of each m timen，ΔPn＝(Pn+m-Pn) M according to Δ PnThe selection is carried out as follows:
when Δ PnWhen the value is more than or equal to the delta Po, executing the step S71; otherwise, executing step S72;
s71 according to Δ PnIncreasing the frequency of the compressor until the frequency of the compressor is adjusted to the set frequency corresponding to the current drying stage, and performing S8;
s72, maintaining the current frequency operation of the compressor and continuously judging the power of the drying fan; when the power of the drying fan is attenuated to cP0When the following, the step S73 is executed; otherwise, returning to the step of S61 to continue executing S61-S62;
s73, controlling the drying system to pause;
and S8, continuing to operate the drying system until the drying program is finished.
Δ Po in step S61 is a power increase setting value, and an increase of 1W per minute is generally set as a determination. After the filter screen is washed, the air quantity of the drying system is lower due to the fact that the filter screen is covered by the water film, the drying system is not suitable for running at a higher compressor frequency, along with the reduction of the water film, the power of the fan is gradually increased, and the frequency of the compressor can be gradually recovered.
The step of S71 is based on Δ PnThe frequency of the compressor is increased until the frequency of the compressor is adjusted to the set frequency corresponding to the current drying stage, and the specific operation manner of the step S8 can be performed according to the Δ PnIncreasing the compressor frequency, e.g. controlling the compressor frequency to shift up, and returning to step S62 every time the compressor frequency is increased by one shift, calculating Δ Pn＝(Pn+m-Pn) M and determining whether or not Δ PnΔ Po until the frequency of the compressor is adjusted to be in pairThe step S8 is performed according to the set frequency of the current drying stage.
Understandably, Δ Pn＝(Pn+m-Pn) M in/m represents a time period; pnRepresenting the fan power (for m time periods); pn+mRepresenting the fan power after the m time period.
Of course, the monitoring of the change of the fan power is not limited to the Δ P given in the embodimentn＝(Pn+m-Pn) And/m, and may be a power rise value, a rise difference value, and a rise rate. These are all possible variations of the invention and are within the spirit and scope of the invention as defined by the appended claims.
The step of increasing the drying fan rotating speed to the first set rotating speed in the step of S61 is to more accurately detect and compare the change of the fan power.
The power attenuation coefficient c in the step S72 directly reflects the water film condition after the filter screen is washed, and when the water film is covered seriously, the normal operation of the drying system is affected, and at this time, the drying system needs to stop operating, preferably, the drying system is allowed to stand for a period of time by stopping the operation of the drying system, and the drying system can continue to operate after the water film is broken due to the self weight. The power attenuation coefficient c is preferably 60-65% in the embodiment, m is the standing time of the drying system, and the embodiment is more favorable when the power attenuation coefficient c is preferably within the range of 5-10 minutes.
(7) Step S8
And after the filter screen is washed, judging whether the rising value of the fan power reaches a set value within a set time range through the steps of S6-S7, adjusting the frequency of the compressor, finally enabling the compressor to recover to the set frequency of the current stage to operate, and continuing to operate the drying system until the drying program is finished. Therefore, the condition that the compressor recovers the set power too early when the water film is not completely broken can be avoided, and the drying effect is reduced, the drying time is prolonged, and the energy consumption is increased.
As will be understood by those skilled in the art, the specific determination manner of the "setting parameter of the current stage" according to the compressor frequency set by the drying parameter and the drying performance adjustment requirement of the stage is well known in the art and will not be described in detail herein.
Further, it should be noted that: aP of the present application0I.e. a x P0Product of, bt0I.e. bx t0The product of (a).
After the drying filter screen is washed in the drying operation, the rotating speed of the drying fan is firstly increased to the preset rotating speed, then whether the rising value of the power of the drying fan in the set time reaches the set value or not is judged, and the frequency of the compressor is increased only when the power of the drying fan reaches the set value, so that the compressor is recovered to the set frequency of the current drying stage to continuously operate the drying system until the drying program is finished. The drying air inside the drying air channel is smooth and easy to circulate, the energy consumption is low, the drying efficiency is high, the drying effect is good, and the customer experience is good.
The above description is only for the specific 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 conceive of the changes or substitutions within the technical scope of the present application, and all the changes or substitutions should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (11)

1. The utility model provides a control method after accomplishing stoving filter screen washing in the stoving operation, the stoving filter screen is used for filtering washing machine drying system's stoving air current, the stoving air current is provided power by drying fan, the clearance of filter screen adopts the mode of spraying to wash its characterized in that:
after the drying filter screen is washed in the drying operation, the rotating speed of the drying fan is firstly increased to a preset rotating speed, then whether the rising value of the power of the drying fan in the set time reaches a set value or not is judged, and only when the power of the drying fan reaches the set value, the frequency of the compressor is increased, so that the compressor is recovered to the set frequency of the current drying stage to continuously operate the drying system until the drying program is finished.
2. The control method according to claim 1, characterized in that: after finishing drying the filter screen and washing in the stoving operation, rising drying blower rotational speed earlier and predetermineeing the rotational speed, judge again whether the rising value of drying blower power in the settlement time reaches the setting value, only reach the setting value when drying blower power, just rise the compressor frequency, make it resume to the setting frequency of current stoving stage and continue to operate drying system until the stoving procedure is ended, include:
s61, increasing the rotating speed of the drying fan to the first set rotating speed;
s62, detecting the power of the drying fan in real time at the first set rotating speed of the drying fan and calculating the power increase value delta P of each m timen，ΔPn＝(Pn+m-Pn) M according to Δ PnThe selection is carried out as follows:
when Δ PnWhen the value is more than or equal to the delta Po, executing the step S71; otherwise, executing step S72;
s71 according to Δ PnIncreasing the frequency of the compressor until the frequency of the compressor is adjusted to the set frequency corresponding to the current drying stage, and performing S8;
s72, maintaining the current frequency operation of the compressor and continuously judging the power of the drying fan; when the power of the drying fan is attenuated to cP0When the following, the step S73 is executed; otherwise, returning to the step of S61 to continue executing S61-S62;
s73, controlling the drying system to pause;
and S8, continuing to operate the drying system until the drying program is finished.
3. The control method according to claim 2, characterized in that:
the step of S71 is according to delta PnAnd increasing the frequency of the compressor comprises controlling the frequency of the compressor to be up step by step, and returning to execute the step S62 every time the frequency of the compressor is increased by one step until the frequency of the compressor is adjusted to the set frequency corresponding to the current drying stage, and executing the step S8.
4. The control method according to claim 3, characterized in that:
the screen washing step performed before the S61 step includes:
s51, reducing the rotation speed of the drying fan and the frequency of the compressor, and enabling the drying fan to operate at a second rotation speed and the compressor to operate at a second frequency;
and S52, washing the filter screen until the washing is finished.
5. The control method according to claim 4, characterized in that:
before the step of S51, the method also comprises the following drying filter screen washing judgment steps:
s1, running a drying program to enable the drying fan to run at a set rotating speed and the compressor frequency to run at a set power, and obtaining the initial power P of the drying fan0Presetting total drying time t0And timing the running time t of the compressor;
s2, controlling the drying fan to operate at a first set rotating speed after the drying system operates for a preset time T;
s3, detecting the power P of the drying fan in real time at the first rotating speed of the drying fan and comparing the power P with the initial power P0Comparing, when the power of the drying fan is attenuated to aP0P ≦ aP0If so, executing a drying time length judging step S4, otherwise, continuing to execute the step S3;
s4, judging the actual operation time t of the compressor of the drying system and the preset total drying time t0When t is less than or equal to bt0If so, executing a filter screen washing control S5 step, otherwise, returning to the S3 step to continue judging;
s5, executing filter screen washing control;
in the step S3, a is a power attenuation coefficient affecting the normal operation of the drying system, and in the step S4, b is a drying time period coefficient.
6. The control method according to claim 5, characterized in that: and b is 15-20%, a is 80-85%, and T is 10-15 minutes.
7. The control method according to claim 5, characterized in that: the operation of the drying program in the step S4 is a single drying mode.
8. A control device of a heat pump laundry treatment device, characterized in that it comprises one or more processors and a non-transitory computer-readable storage medium storing program instructions, which when executed by the one or more processors, are adapted to implement the method according to any one of claims 1-8.
9. A non-transitory computer-readable storage medium having stored thereon program instructions which, when executed by one or more processors, are to implement the method of any one of claims 1-7.
10. A heat pump laundry treatment apparatus, characterized in that it employs the method of any of claims 1-7, or comprises the control apparatus of claim 8, or has the non-transitory computer readable storage medium of claim 9.
11. A heat pump laundry processing apparatus according to claim 10, wherein: it is equipped with drying system, drying system includes: the device comprises a heat pump system, a drying fan, a drying air duct, a drying filter screen and a spraying cleaning unit;
the drying air channel is communicated with a space for forming air circulation and circulation between the air inlet and the air outlet of the roller and is used for the circulation of drying air;
the drying fan is arranged in the drying air channel and provides circulating power for drying air;
the drying filter screen is arranged at the air outlet of the roller or in the drying air channel and is used for filtering drying air;
the filter screen cleaning unit is a spraying device with a water inlet valve and is used for cleaning the filter screen;
the control device includes:
the detection unit is used for acquiring parameter information of the drying system, wherein the parameter information comprises rotating speed information of the drying fan, power information of the drying fan and frequency information of the compressor;
the storage unit is used for storing set parameters of the drying system, and the set parameters comprise set rotating speed information of the drying fan, set power information of the drying fan, set frequency information of the compressor and drying time length information at different drying stages;
the timing unit is used for timing the operation time of the drying system and the washing time of the filter screen;
and the processing unit is used for calculating, analyzing and processing according to the information of the detection unit, the storage unit and the timing unit.
CN202111448370.8A 2021-11-30 2021-11-30 Drying filter screen washing control method and heat pump washing machine Active CN114182514B (en)

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CN106592183A (en) * 2015-10-20 2017-04-26 杭州三花家电热管理系统有限公司 Drying system, clothes drying device and working method of clothes drying device
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CN110438753A (en) * 2018-05-03 2019-11-12 无锡小天鹅电器有限公司 Line considers self cleaning method and system to be worth doing
CN112779718A (en) * 2020-12-29 2021-05-11 珠海格力电器股份有限公司 Washing device and control method

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* Cited by examiner, † Cited by third party
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JP2008183307A (en) * 2007-01-31 2008-08-14 Sanyo Electric Co Ltd Laundry drier
CN102482823A (en) * 2009-10-27 2012-05-30 松下电器产业株式会社 Clothes dryer and washer/dryer
JP2011115428A (en) * 2009-12-04 2011-06-16 Panasonic Corp Clothes dryer
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