CN114182514B - 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
CN114182514B
CN114182514B CN202111448370.8A CN202111448370A CN114182514B CN 114182514 B CN114182514 B CN 114182514B CN 202111448370 A CN202111448370 A CN 202111448370A CN 114182514 B CN114182514 B CN 114182514B
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drying
filter screen
fan
power
compressor
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CN114182514A (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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    • 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 is dried the in-process and is followed the production of hair chips, for avoiding the hair chips to block up the stoving wind channel, often can install the filtration unit in fan air inlet department, and the filter screen can effectively filter the hair chips 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 the flock in the 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 a first set rotating speed of the drying fan and calculating a power increase value delta P of each m time n ，ΔP n =（P n+m -P n ) M according to Δ P n The selection proceeds to the next step:
when Δ P is n When the value is more than or equal to the delta Po, executing the step S71; otherwise, executing step S72;
s71 according to Δ P n Increasing 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 the step 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 cP 0 When the following, executing step S73; otherwise, returning to the step S61 and continuing to execute the steps 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 is according to Δ P n And increasing the frequency of the compressor comprises controlling the frequency of the compressor to be up step by step, and returning to the step S62 every time when 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 carrying out the step S8.
In a further alternative embodiment 4, the step of washing the filter screen before the step S61 includes:
s51, reducing the rotating speed of the drying fan and the frequency of the compressor, and enabling the drying fan to operate at a second rotating 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 S51, the method further includes the following drying and screen washing judgment step:
s1, running a drying program to enable a drying fan to run at a set rotating speed, running a compressor at a set power frequency, and obtaining initial power P of the drying fan 0 Presetting total drying time t 0 Timing the running time t of the compressor;
s2, when the drying system operates for a preset time T, controlling the drying fan to operate at a first set rotating speed;
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 P 0 Comparing, when the power of the drying fan is attenuated to aP 0 P ≦ aP 0 If so, executing a drying time length judging step S4, otherwise, continuing to execute the step S3;
s4, judging the actual operation time t of a compressor of the drying system and the preset total drying time t 0 When t is less than or equal to bt 0 If so, executing a filter screen washing control S5 step, otherwise, returning to the S3 step to continue judging;
s5, executing filter screen flushing control;
in the step S3, a is a power attenuation coefficient affecting normal operation of the drying system, and in the step S3, b is a drying time length coefficient.
Further optional example 6, in the step S3, if P is present>aP 0 If so, returning to the step S3 to continue detection; in the step S4, if t>bt 0 And returning to the step S3 to continue detection.
In a further optional embodiment 7, the b is taken from 15 to 20%, the a is taken from 80 to 85%, and the T is taken from 10 to 15 minutes.
In a further optional embodiment 8, the step S4 is performed in a single drying mode.
Further optional embodiment 9, a control apparatus of a heat pump laundry processing apparatus, comprising one or more processors and a non-transitory computer-readable storage medium storing program instructions which, when executed by the one or more processors, the one or more processors are configured to implement the method of any of embodiments 1-8.
A second invention provided by the present invention is a control device of a heat pump laundry processing device, comprising 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 configured to implement the method according to any one of embodiments 1-8.
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 duct 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 control of 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 to enable 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 variation and the set value within the 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.
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 should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
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 that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
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.
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. 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 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 phrases "comprising one of \8230;" does not exclude the presence of additional like elements in an article or system comprising 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, and 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 tub disposed in the casing, and a drying fan assembly 43, a dual device assembly 44 and a connecting air duct between the clothes treating tub and the casing, the clothes treating tub includes an inner tub 3 and an outer tub 23, the drying fan assembly 43, the dual device assembly 44 and the connecting air duct are disposed above the outer tub 23, the top of the outer tub 23 is provided with an outer tub air inlet 22 and an outer tub air outlet 21, the drying fan assembly 43, the dual device assembly 44 is connected between the outer tub air inlet 22 and the outer tub air outlet 21, specifically, the outer tub air inlet 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 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-unit assembly 44 includes two unit boxes forming a heat exchange cavity and two units, i.e., an evaporator and a condenser, disposed in the heat exchange cavity, and the drying air flows through the two unit boxes and then completes heat exchange with the evaporator and the condenser in the heat exchange cavity (the drying air is cooled by the evaporator to remove moisture when flowing through the evaporator and is heated when flowing 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 circulating flow path of drying air, 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 and provides 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 department 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 air outlet 21 of the outer cylinder to facilitate the space for storing the flock and the 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 spray cleaning unit is provided with a spray water inlet pipe 26, and the spray 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 coverage surface, so that the cleaning is more thorough, and the condition that part of 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 the skillful design of multiple spraying modes for different washing requirements can have better washing effect than that of a single washing mode: firstly, unnecessary water waste and energy waste caused by a small drying load are prevented; secondly, avoid because the too big filter screen ponding that leads to of water spray volume is too much and the water film is too thick, cause later stage drying efficiency to reduce and the stoving 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 spraying opening of the spraying device to intermittently spray a washing medium, and the continuous washing is to enable the water spraying opening of the spraying device to continuously spray the washing medium.
As an alternative scheme of 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 of the water inlet valve (or further adjusting the opening and closing degree).
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 disclosure; the intermittent washing is that the spraying water inlet valve controls the water spraying port 2422 of the spraying device to intermittently spray washing media, at the moment, an approximately parabolic overflowing surface which is continuously expanded from bottom to top is formed on the screen surface of the screen 241, and when the control device controls the spraying water inlet valve to enable the water spraying port to continuously spray the washing media (such as water), the washing media are downwards sprayed to the middle area of the screen along a parabola, so that a large-area water film of the screen is not formed, and the subsequent drying procedure can be performed by quickly recovering the normal frequency of the compressor. 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. But 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 water film is prevented from being too thick, and unnecessary water source waste, energy waste and time waste (overlong drying time) can be prevented.
Further preferably, the control device controls the water spraying port 2422 to spray the flushing medium at a single intermittent frequency, such as 0.5 to 1 second, so that the sprayed 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 beneficial to forming the parabola-shaped overflow surface of the filter surface. And the control device is also used for controlling the spraying device 21 to spray intermittent washing for t1 time through the spraying water inlet valve, wherein the t1 time is 1-5 seconds, so that one or more times of intermittent washing can be carried out within the t1 time. With further reference to fig. 7, fig. 4 is a schematic view illustrating a covering effect of continuous washing of the drying filter screen according to the embodiment of the present application; the continuous flushing is that the spraying water inlet valve controls the water spraying port of the spraying device to continuously spray 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 continuously washes in the spraying time t 2. the time t2 is at least 5 seconds and the spraying time is continuous, so that continuous straight water flow is formed to wash the two sides of the filter screen 10. In order to fully cover and flush the filter screen 10, the control device controls the spray cleaning unit to clean in an intermittent flushing mode and a continuous flushing mode through the spray water inlet valve, and the intermittent flushing mode and the continuous flushing mode are alternately carried out between the set flushing 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 the control of the reaction time; at interval time t3, the continuously washed aqueous medium is taken as two sides of the middle area of the filter screen and part of the middle area according to the impact position, 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 the interval time t3, the water medium flushed intermittently is converged with the water medium flowing down automatically, the flock on the filter screen 10 is deeply removed, and the ventilation effect of the filter screen is ensured.
Example 2
Inside installing circulated air formula drying device additional of present heat pump washing machine, the clothing is dried the in-process and is accompanied the production of flock, often can block up the filter screen, influences the flow of wind and influences the stoving effect of evaporimeter and condenser, for this reason often needs the stoving filter screen to wash in the stoving operation, hold in what total and wash, how to resume drying system's the very big influence of operation after washing drying efficiency, stoving energy consumption and customer experience. 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 a first set rotating speed of the drying fan and calculating a power increase value delta P of each m time n ，ΔP n =（P n+m -P n ) M according to Δ P n The selection is carried out as follows:
when Δ P n When the value is more than or equal to the delta Po, executing the step S71; otherwise, executing step S72;
s71 according to Δ P n Increasing 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 cP 0 When the following, executing step S73; otherwise, returning to the step S61 and continuing to execute the steps 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 program, the control method comprises the following control steps:
s1, running a drying program to enable a drying fan to run at a set rotating speed, running a compressor at a set power frequency, and obtaining initial power P of the drying fan 0 Presetting total drying time t 0 And timing the running time t of the compressor;
s2, after the drying system operates for a preset time T, controlling the drying fan to operate at a first set rotating speed;
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 P 0 Comparing, when the power of the drying fan is attenuated to aP 0 P ≦ aP 0 If so, executing a drying time length judging step S4, otherwise, continuing to execute the step S3;
s4, judging the actual operation time t of a compressor of the drying system and the preset total drying time t 0 When t is less than or equal to bt 0 If so, executing the step S5 of executing filter screen washing control, otherwise, returning to the step S3 to continue judging;
s5, executing filter screen flushing control until flushing 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 a first set rotating speed of the drying fan and calculating a power rise value delta P of every m time n ，ΔP n =（P n+m -P n ) M according to Δ P n The selection is carried out as follows:
when Δ P n When the value is more than or equal to the delta Po, executing the step S71; otherwise, executing step S72;
s71 according to Δ P n Increasing 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 the step 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 cP 0 When the following, executing step S73; otherwise, returning to the step S61 and continuing to execute the steps 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) S1, a step: running a drying program to enable the drying fan to run at a set rotating speed, running the compressor at a set power frequency, and acquiring the initial power P of the drying fan 0 Presetting total drying time t 0 And 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 filthy blockage condition of the filter screen, the power of the fan is gradually reduced, so that the filthy blockage condition 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 preset 0 The 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 fitted and correspond to the clothes drying time in different weight grades 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 t 0 The 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 cylinder is large in the process of drying starting and temperature rising and influences the judgment of the fan power, selecting 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 stabilization of the drying system, and preferably the T time 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 P 0 Comparing, when the power of the drying fan is attenuated to aP 0 P ≦ aP 0 If so, executing a drying time length judging step S4, otherwise (P)>aP 0 When the step (3) continues to execute the step (3);
(4) S4, judging the actual operation time t of a compressor of the drying system and the preset total drying time t in the step 0 When t is less than or equal to bt 0 If so, executing the step S5 of screen washing control, otherwise (i.e. t)>bt 0 ) Returning to the step S3 for continuous judgment; in the step S4, a is a power attenuation coefficient influencing the normal work of the drying system, the resistance of the drying air duct is large at the moment, and the air volume is influenced, wherein a is generally 80-85%.
(5) S5, performing filter screen washing control;
the method comprises the following steps:
s51, reducing the rotating speed of the drying fan and the frequency of the compressor, and enabling the drying fan to operate at a second rotating 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 the stopping of a water inlet valve of the filter screen spraying device in a time sequence of starting A seconds and stopping B seconds for 10 cycles; the method of washing the screen is not limited, and the dried screen may be washed in any manner by 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, the wash program is preferably executed by reducing the dryer fan speed and the compressor frequency such that the dryer fan operates at a second speed and the compressor operates at a second frequency.
(6) And S6-S7 are subsequent operation procedures for ensuring the drying effect after the filter screen is washed in the S5.
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 a first set rotating speed of the drying fan and calculating a power increase value delta P of each m time n ，ΔP n =（P n+m -P n ) M according to Δ P n The selection is carried out as follows:
when Δ P n When the value is more than or equal to delta Po, executing the step S71; otherwise, executing step S72;
s71 according to Δ P n Increasing 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 the step 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 cP 0 When the following, executing step S73; otherwise, returning to the step S61 and continuing to execute the steps 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, because the filter screen is covered by the water film, the air quantity of the drying system is lower at the moment, the drying system is not suitable for running at 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 above step S71 is based on Δ P n Increasing the frequency of the compressor until the frequency of the compressor is adjusted to the set frequency corresponding to the current drying stage, wherein the specific operation mode of the step S8 can be performed according to the delta P n Increasing the frequency of the compressor, for example, controlling the frequency of the compressor to be higher by gears, and returning to step S62 every time the frequency is increased by one gear, and calculating Δ P n =（P n+m -P n ) M and determining whether or not Δ P n And more than or equal to delta Po until the frequency of the compressor is adjusted to the set frequency corresponding to the current drying stage, and the step S8 is carried out.
Understandably, Δ P n =（P n+m -P n ) M in/m represents a time period; p n Representing the fan power (for) before the m time period; p n+m Representing 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 embodiment n =（P n+m -P n ) 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 S61 of increasing the drying fan rotation speed to the first set rotation speed is to more accurately detect and compare the change in 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 affects the normal operation of the drying system when the water film is covered seriously, 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 falls and is broken due to the self weight. The power attenuation coefficient c is preferably 60 to 65% in the embodiment, m is the standing time of the drying system, and the embodiment is more favorable in the range of 5 to 10 minutes.
(7) S8 step
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 S6-S7, adjusting the frequency of the compressor, and finally enabling the compressor to recover to the set frequency of the current stage to operate and continuously operating 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, 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 application 0 I.e. a x P 0 Product of, bt 0 I.e. bx t 0 The 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 only when the power of the drying fan reaches the set value, the frequency of the compressor is increased, so that the compressor returns 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 in circulation, low in energy consumption, high in drying efficiency, good in drying effect and good in customer experience.
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 shall 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, firstly increasing the rotating speed of the drying fan to a preset rotating speed, and then judging whether the rising value of the power of the drying fan in a set time reaches a set value;
when the power of the drying fan reaches a set value, raising the frequency of the compressor to enable the frequency to reach the set frequency of the current drying stage;
and continuing to operate the drying system until the drying program is finished.
2. The control method according to claim 1, characterized in that: after finishing washing the drying filter screen in the drying operation, firstly increasing the rotating speed of the drying fan to a preset rotating speed, then judging whether the rising value of the power of the drying fan in the set time reaches a set value, and when the power of the drying fan reaches the set value, increasing the frequency of the compressor to enable the drying fan to reach the set frequency corresponding to the current drying stage and continuously operating the drying system until the drying program is finished, wherein the method comprises the following steps:
s61, increasing the rotating speed of the drying fan to a first set rotating speed;
s62, detecting the power of the drying fan in real time at a first set rotating speed of the drying fan and calculating a power increase value delta P of each m time n ，ΔP n ＝(P n+m -P n ) M according to Δ P n The selection is carried out as follows:
when Δ P n When the value is more than or equal to delta Po, executing the step S71; otherwise, executing step S72;
s71 according to Δ P n Increasing 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 cP 0 When the following, executing step S73; otherwise, returning to S61 step to continueExecuting 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:
said step S71 is according to Δ P n And increasing the frequency of the compressor comprises controlling the frequency of the compressor to be up step by step, and returning to the step S62 every time when 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 carrying out 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 rotating speed of the drying fan and the frequency of the compressor, and enabling the drying fan to operate at a second rotating 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 S51, the method also comprises the following drying filter screen washing judging step:
s1, running a drying program to enable a drying fan to run at a set rotating speed, running a compressor at a set power frequency, and obtaining initial power P of the drying fan 0 Presetting total drying time t 0 Timing the running time t of the compressor;
s2, when the drying system operates for a preset time T, controlling the drying fan to operate at a first set rotating speed;
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 P 0 Comparing, when the power of the drying fan is attenuated to aP 0 P ≦ aP 0 If so, executing a drying time length judging step S4, otherwise, continuing to execute the step S3;
s4, judging the actual operation time t of a compressor of the drying system and the preset total drying time t 0 When t is less than or equal to bt 0 If so, executing a filter screen washing control S5 step, otherwise, returning to the S3 step to continue judging;
s5, executing filter screen flushing control;
in the step S3, a is a power attenuation coefficient affecting normal operation of the drying system, and in the step S4, b is a drying time length coefficient.
6. The control method according to claim 5, characterized in that: the b is 15-20%, the a is 80-85%, and the T is 10-15 minutes.
7. The control method according to claim 5, characterized in that: and the drying program in the step S4 is operated in 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 configured to implement the method according to any one of claims 1-7.
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 duct 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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JP2008183307A (en) * 2007-01-31 2008-08-14 Sanyo Electric Co Ltd Laundry drier
WO2011052154A1 (en) * 2009-10-27 2011-05-05 パナソニック株式会社 Clothes dryer and washer/dryer
JP2011115428A (en) * 2009-12-04 2011-06-16 Panasonic Corp Clothes dryer
EP2612964B1 (en) * 2012-01-05 2015-03-04 Electrolux Home Products Corporation N.V. Appliance for drying laundry
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
CN106369749B (en) * 2016-09-07 2019-04-16 珠海格力电器股份有限公司 Determine method, blowing device and its control method of the remaining time of cleaning strainer
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CN112779718B (en) * 2020-12-29 2022-03-01 珠海格力电器股份有限公司 Washing device and control method

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