CN114182508A

CN114182508A - Clothes drying judging method and device for clothes treatment equipment and clothes treatment equipment

Info

Publication number: CN114182508A
Application number: CN202111450588.7A
Authority: CN
Inventors: 潘光辉; 覃显钧; 赖毅俊; 林帆; 卢诗雅; 李海杰
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-03-15
Anticipated expiration: 2041-11-30
Also published as: WO2023098130A1; CN114182508B

Abstract

A clothes drying judging method and device for a clothes treatment device and the clothes treatment device are provided, the method comprises the following steps: when the clothes treatment equipment enters a dry judging stage, detecting the power and the rotating speed of a drying fan in the clothes treatment equipment at a set sampling frequency; acquiring a static pressure value of a drying system of the clothes processing equipment according to the acquired power, rotating speed and weighing value of the drying fan, and detecting the frequency of a compressor; and when the dry judgment temperature difference is larger than the temperature difference between the air inlet and the air outlet of the clothes treatment equipment, judging that the clothes in the clothes treatment equipment are dried. According to the scheme of the invention, the drying judgment precision of clothes with different weights can be improved; thereby reducing the damage to the clothes caused by fiber shedding caused by too low moisture content of the clothes at the drying end.

Description

Clothes drying judging method and device for clothes treatment equipment and clothes treatment equipment

Technical Field

The invention relates to the field of intelligent control, in particular to a clothes drying judging method and device for clothes treatment equipment and the clothes treatment equipment.

Background

In recent years, the development of the clothes treatment equipment industry shows diversified trends, and along with the improvement of the living standard of people, the demand of drying clothes is increasingly increased; the damage of drying and overdrying to clothes of different materials is large; the user experience is poor if the drying is not done; the drying uniformity is greatly influenced by the quantity of clothes, partial clothes are not dried easily due to more clothes, and the drying effect is poor due to program judgment;

the drying in the current market is mainly electrically heated water-cooled drying, the drying temperature is high, and the accuracy of drying judgment is poor; clothing damage and poor user experience. The heat pump washing and drying machine in the market adopts a scheme of a fixed-frequency press and a variable-frequency fan or a scheme of a variable-frequency press and a fixed-frequency fan or a scheme of a fixed-frequency fan and a fixed-frequency fan; the drying judgment temperature drifts due to different flocks on the air duct filter in each drying process; therefore, the accurate dry judgment time point cannot be determined through the corresponding relation between the press and the fan working point. Therefore, a scheme capable of accurately acquiring the clothes drying temperature difference and drying the clothes is needed in the prior art.

The above information disclosed in the background section is only for further understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

The invention provides a clothes drying judging method and device for clothes processing equipment and the clothes processing equipment, and the clothes drying judging scheme provided by the invention can calculate a static pressure value of a drying system through the power and the rotating speed of a fan; calculating a temperature difference value of drying judgment according to the weight of the clothes, the static pressure value and the press frequency value; in addition, the accuracy of the trunk judgment can be improved, and the damage to the clothes can be reduced.

A first aspect of the present invention provides a laundry judging method for a laundry treating apparatus, comprising: s1: when the clothes processing equipment enters a dry judging stage, detecting the power and the rotating speed of a drying fan in the clothes processing equipment at a set sampling frequency; s2: obtaining a static pressure value of a drying system of the clothes processing equipment according to the power and the rotating speed of the drying fan under the sampling frequency, and detecting the frequency of a compressor; s3: obtaining a dry judgment temperature difference of the clothes treatment equipment according to the weighing value of the weight of clothes in the clothes treatment equipment, the static pressure value and the frequency of a compressor; s4: and when the dryness judging temperature difference is larger than the temperature difference between the air inlet and the air outlet of the clothes treatment equipment, determining that the clothes in the clothes treatment equipment are dried.

According to an embodiment of the present invention, before the step S1, the method further includes: s0: the method includes detecting a weight of laundry in the laundry treating apparatus when the laundry satisfies a drying condition.

According to an embodiment of the present invention, wherein the step S0 includes: detecting the amount of water in the laundry treating apparatus when the laundry satisfies a drying condition, performing a weighing command and detecting the weight of the laundry in the laundry treating apparatus when the amount of water in the laundry treating apparatus is less than a preset threshold, opening a drain structure of the laundry treating apparatus when the amount of water in the laundry treating apparatus is greater than the preset threshold, and performing the weighing command and detecting the weight of the laundry in the laundry treating apparatus when the laundry treating apparatus reaches an empty tub of water.

According to an embodiment of the present invention, wherein the step S2 includes: and obtaining the static pressure value of the drying system of the clothes processing equipment through the functional relation among the power, the rotating speed and the sampling frequency of the drying fan. Wherein said function relates said static pressure value to a₁P+b₁r+c₁Wherein a is₁Is the power coefficient of the drying fan, P is the power of the drying fan, b₁For drying fan speed coefficient, c₁Is a constantAnd r is the rotating speed of the drying fan.

According to an embodiment of the present invention, wherein the step S3 includes: and obtaining the dry judging temperature difference through a mapping relation table of the weighing value of the weight of the clothes in the clothes processing equipment, the static pressure value, the frequency of the compressor and the dry judging temperature difference, which are preset in the clothes processing equipment.

According to an embodiment of the present invention, wherein the compressor frequency is a variable value or a fixed value in the mapping table.

According to an embodiment of the present invention, after the step S3, when the dryness determination temperature difference is smaller than the temperature difference between the air inlet and the air outlet of the laundry treatment apparatus, the steps S1-S2 are continued until the dryness determination temperature difference is larger than the temperature difference between the air inlet and the air outlet of the laundry treatment apparatus.

A second aspect of the present invention provides a laundry drying judging device for a laundry treating apparatus, comprising a memory and a processor; the memory is used for storing a computer program; the processor is used for realizing the clothes drying judging method when executing the computer program.

A third aspect of the present invention provides a clothes treating apparatus, which adopts the clothes drying judging method or comprises the clothes drying judging device.

According to the scheme of the invention, the drying judgment precision of clothes with different weights can be improved; thereby reducing the damage to the clothes caused by fiber shedding caused by too low moisture content of the clothes at the drying end.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive work.

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 flowchart of a clothes drying method for a clothes treating apparatus according to an exemplary embodiment of the present invention.

Fig. 3 is a flowchart of an implementation of a clothes drying method for a clothes treating apparatus according to an exemplary embodiment of the present invention.

FIG. 4 is a graph of static pressure K versus power at a certain rotational speed in accordance with an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

As used herein, the terms "first," "second," and the like may be used to describe elements of exemplary embodiments of the invention. These terms are only used to distinguish one element from another element, and the inherent features or order of the corresponding elements and the like are not limited by the terms. Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms, such as those defined in commonly used dictionaries, are to be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Those skilled in the art will understand that the devices and methods of the present invention described herein and illustrated in the accompanying drawings are non-limiting exemplary embodiments and that the scope of the present invention is defined solely by the claims. Features illustrated or described in connection with one exemplary embodiment may be combined with features of other embodiments. Such modifications and variations are intended to be included within the scope of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, a detailed description of related known functions or configurations is omitted to avoid unnecessarily obscuring the technical points of the present invention. In addition, the same reference numerals refer to the same circuits, modules or units throughout the description, and repeated descriptions of the same circuits, modules or units are omitted for brevity.

Further, it should be understood that one or more of the following methods or aspects thereof may be performed by at least one control unit or controller. The terms "control unit," "controller," "control module," or "master module" may refer to a hardware device that includes a memory and a processor. The memory or computer-readable storage medium is configured to store program instructions, while the processor is specifically configured to execute the program instructions to perform one or more processes that will be further described below. Moreover, it is to be appreciated that the following method may be performed by including a processor in combination with one or more other components, as will be appreciated by one of ordinary skill in the art.

Fig. 1a-1b are schematic views of a drying system of a clothes treating apparatus according to the present invention, according to one exemplary embodiment of the present invention. The interior of the drying box is additionally provided with a heat pump system for providing a drying effect. The specific application scene can be a single dryer or a washing and drying integrated machine.

As shown in fig. 1a and 1b, the clothes treating apparatus of the present embodiment 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 disposed 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, an outer tub air inlet 22 and an outer tub air outlet 21 are disposed at the top of the outer tub 23, 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-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 drum 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 drum 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 drum 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 drum 23, so that the drying effect of the clothes is realized.

Further, 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. The drying flow path is provided with a fan for driving drying air to flow and providing flowing power of drying air flow. Preferably, the filter screen is installed at the air inlet end of 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 outer cylinder air outlet 21 to facilitate the space for storing the flock and facilitate timely cleaning.

Preferably, this application fan is frequency conversion drying fan, compressor and is frequency conversion compressor, and this application still includes detecting element in addition, and detecting element it is equipped with, parts such as air intake temperature sensing package, air-out temperature sensing package.

Fig. 2 is a flowchart of a clothes drying method for a clothes treating apparatus according to an exemplary embodiment of the present invention. According to the invention, by adopting the scheme of the variable frequency fan and the variable frequency compressor, the static pressure value of the drying system can be calculated through the power value and the rotating speed value collected by the variable frequency fan, so that the amount of the flock in the filter is obtained, the drying judgment temperature is adjusted according to the amount of the flock, the drift of the drying judgment temperature is effectively inhibited, the drying judgment is adjusted according to the weight of clothes, the drying uniformity is improved, and the difference value of the drying judgment temperature is calculated according to the working frequency and the static pressure value of the compressor.

As shown in figure 2 of the drawings, in which,

at step S0, when the laundry satisfies the drying condition, the weight of the laundry within the laundry treating apparatus is detected.

At step S1, when the laundry processing apparatus enters a dry judging stage, detecting the power and the rotation speed of a drying fan in the laundry processing apparatus at a set sampling frequency;

at step S2, obtaining a static pressure value of the drying system of the clothes processing equipment according to the power and the rotating speed of the drying fan at the sampling frequency, and detecting the frequency of a compressor; the power value may be determined according to a sampling frequency, for example, a power value at a certain sampling frequency may be selected, or an average value of power values at different sampling frequencies over a period of time may be selected;

at step S3, obtaining a dryness determination temperature difference of the laundry treating apparatus according to a weighing value of the weight of laundry in the laundry treating apparatus, the static pressure value, and the frequency of the compressor;

at step S4, when the dryness determination temperature difference is greater than the temperature difference between the air inlet and the air outlet of the laundry treatment apparatus, it is determined that the laundry in the laundry treatment apparatus is dried.

Fig. 3 is a flowchart of an implementation of a clothes drying method for a clothes treating apparatus according to an exemplary embodiment of the present invention. Wherein the content of the first and second substances,

at S31, the laundry treating apparatus (or laundry treating device) starts drying;

at S32, detecting the amount of water in the tub;

at S33, determining whether the weighed amount of water is satisfied, and if the execution of the drain instruction is not satisfied, directing the drain to the empty bucket level; if yes, executing a weighing command;

at S34, a weigh command is executed, recording a weigh value of M

At S35, judging whether the drying stage reaches the dry judging stage, if not, continuing to execute the drying process until reaching the dry judging stage, and if so, entering the dry judging process;

at S36, the controller detecting unit starts to detect the power and the rotating speed of the drying fan, and the sampling frequency is T1;

at S37, obtaining a static pressure K value from the power, speed, and static pressure functional relationship of fig. 4 based on the S36 sampled data; the function relationship is that the static pressure value is aP + br + c, wherein a is a power coefficient of the drying fan, P is the power of the drying fan, b is a rotation speed coefficient of the drying fan, c is a constant, and r is the rotation speed of the drying fan;

at S38, detecting the compressor frequency F;

at S39, obtaining a dry judgment temperature difference through the mapping relation of the table 1 according to the weighing value M, K value and the frequency value;

at S310, a control unit in the laundry processing apparatus collects temperatures of the air inlet bulb and the air outlet bulb; calculating the difference value of the air inlet temperature minus the air outlet temperature;

at S311, the relationship between the difference T and the dry temperature difference is determined; if T is less than T1, it may be determined that the laundry is dried; if the value is greater than or equal to t 1; the determination is continued from S36.

According to one or more embodiments of the present invention, table 1 is a mapping table of compressor frequency F, laundry weight value M, static pressure K, dry temperature difference t. In table 1, the frequency of the compressor is a variable value.

TABLE 1

FIG. 4 is a graph of static pressure K versus power at a certain rotational speed in accordance with an exemplary embodiment of the present invention. Fig. 4 shows a diagram of the drying system static pressure K versus the compressor power at a certain rotational speed, wherein the horizontal axis represents the static pressure and the vertical axis represents the power. According to fig. 4, the static pressure value of the drying system at a certain rotation speed can be obtained.

In an implementation manner provided by this embodiment, the current static pressure value K of the drying system is determined according to a functional relationship between the static pressure value K and the rotational speed and power of the drying fan, where the function includes:

K＝aP+br+c；

wherein: p is the fan power, a is the fan power coefficient, r is the fan speed, b is the fan speed coefficient, and c is a constant;

it should be noted that a, b, and c are function relationships based on K, and K is made to approach to the optimal values corresponding to different set rotation speeds and set powers obtained by the corresponding wind tunnel test measured values through neural network learning and training for different set rotation speeds and set powers, so a, b, and c are not completely fixed constants, and are related to the selected set rotation speed and set power of the fan. When the set rotating speed of the fan is unchanged, the set power is unchanged, and a, b and c are relatively unchanged; when the set rotating speed and the set power of the fan are changed, the corresponding a, b and c may not be the same.

Under the condition that the drying systems are the same, the set power of the fan and the set rotating speed are in one-to-one correspondence, and the set power value can be measured according to the operation of the drying fan in the drying systems at the corresponding set rotating speed. In practice, due to different requirements on drying load and drying performance at different operation stages, the set rotating speeds n of the fans meeting the drying work requirements at different drying stages are different. In addition, the actual power of the fan can be changed due to the change of the load of the fan in consideration of the reasons that the filter screen is blocked and the like in the actual operation of the fan power. In order to accurately calculate the static pressure of the drying system according to the functional relationship between the drying system and the rotating speed and the power of the drying fan, it is surprisingly found that, for a certain set rotating speed, the result of calculating the K function by segmenting by taking the set power corresponding to the set rotating speed as a dividing point is more accurate. Of course, without considering the complexity of the program, theoretically, the function relationship between the static pressure value K of the drying system and the rotation speed and power of the drying fan can also be set as more sections of functions, so as to improve the accuracy of the calculation result of the model.

For example, if the set speed n of the drying fan is 4500RPM and the corresponding set power Po of the drying fan is 68W, the linear function can be changed into a piecewise function by using the set power 68W as a boundary value under the condition of keeping the set speed of the drying fan to be 4500RPM, that is, the set speed n of the drying fan is 4500RPM, that is, the linear function is changed into the piecewise function

(1)K₁＝a₁P+b₁r+c₁(r 4500RPM, P less than 68W);

(2)K₂＝a₂P+b₂r₂+c_2；(r 4500RPM, P greater than or equal to 68W);

that is, if the drying fan operates at 4500RPM, K is used when the current power P is less than 68W₁＝a₁P+b₁r+c₁The function calculates K1, and K is adopted if the current power P is larger than 68W₂＝a₂P+b₂r₂+c₂The function finds K2.

Then obtaining the corresponding piecewise function K through nerve training and learning respectively₁A of (a)₁、b₁、 c₁Preferred values and K₂A of (a)₂、b₂、c₂A preferred value of (a), wherein a₁＝-100/3，b₁＝0.5c₁＝383； a₂＝-100/9，b₂＝0.3c₂-228; namely:

(1)K₁-100/3 × P +0.5r +383(r 4500RPM, P less than 68W);

(2)K₂＝-100/9*P+0.3r₂+228(r 4500RPM, P greater than or equal to 68W);

thus, at 4500RPM and 68W, when the current fan power P is less than 68W, the current fan power P may be substituted into K_{1 in}Calculating static pressure value of the drying system, and substituting the current fan power P into K when the current fan power P is more than 68W₂And (5) solving the static pressure value of the drying system. For example, when the set rotation speed is 4500RPM and the current power meter is 70W, the static pressure value is 300 pa.

Based on the above calculation thought, a plurality of piecewise function curves corresponding to different set rotating speeds and set powers can be obtained, the curves are stored in the controller, and the corresponding piecewise function curves can be called for comparison in judgment. Therefore, the corresponding piecewise function curve and the corresponding static pressure value of the drying system can be searched through the current rotating speed and power. The embodiment shown above is a two-stage piecewise function obtained with a set speed of 4500RPM and a set power meter of 68W, where the horizontal axis represents static pressure and the vertical axis represents power. When it is required to determine that the drying fan is currently operated at the set rotation speed of 4500RPM, the current drying system static pressure value at the current power of 70W is found, and the corresponding function curve of K at 4500RPM is found, as described above, at the set rotation speed of 4500RPM, the current drying system static pressure value at the current power of 70W is 300 pa. Therefore, the current static pressure value of the drying system can be determined as long as the current fan rotating speed and power are obtained. Through the static pressure determining mode of the drying system, the mutual influence of the rotating speed of the fan, the power of the fan and a water film is comprehensively considered, and the filthy degree of the filter screen can be more accurately judged, and the washing mode and the washing time can be more accurately controlled. The problem of the drying system actual static pressure be difficult to measure and lead to utilizing the drying system static pressure value to carry out the filter screen and wash the difficult control is solved. In actual operation, the current static pressure value of the drying system can be determined only by monitoring the power and the rotating speed of the fan through the monitoring device.

As will be understood by those skilled in the art, K is static pressure in units of pa, P is fan power in units of w, r is fan speed in units of RPM, such that a is a fan power coefficient in units of pa/w, b is a fan speed coefficient in units of pa/RPM, and C is a constant in units of pa.

According to one or more embodiments of the present invention, a table of a mapping relationship of the stored laundry weight value M, the stored static pressure K, and the stored temperature difference t in the control system of the laundry treating apparatus is shown in table 2, wherein the frequency of the compressor in table 2 is F1, which is fixed.

TABLE 2

At this time, the implementation flow of the clothes drying judging method for the clothes treatment equipment is as follows:

at S41, the laundry treating apparatus starts drying;

at S42, detecting the amount of water in the tub;

at S43, determining whether the weighed amount of water is satisfied, and if the execution of the drain instruction is not satisfied, directing the drain to the empty bucket level; if yes, executing a weighing command;

at S44, a weigh command is executed, recording a weigh value of M

At S45, judging whether the drying stage reaches the dry judging stage, if not, continuing to execute the drying process until reaching the dry judging stage, and if so, entering the dry judging process;

at S46, the controller detecting unit (or control system) of the laundry treating apparatus starts to detect the power and the rotation speed of the drying fan, with a sampling frequency of T1;

at S47, obtaining a static pressure K value from the power, speed, and static pressure functional relationship of fig. 4 based on the S46 sampled data;

at S48, detecting the compressor frequency F;

at S49, obtaining a dry judgment temperature difference through the mapping relation of the table 2 according to the weighing value M, K value and the frequency value;

at S410, the control unit collects the temperatures of the air inlet bulb and the air outlet bulb; calculating the difference between the air inlet temperature and the air outlet temperature;

at S411, judging the relation between the difference T and the dry judgment temperature difference; if T is less than T1, it may be determined that the laundry is dried; if the value is greater than or equal to t 1; the determination is continued from S46.

According to one embodiment of the invention, the methods in which the static pressure is calculated and the arbitration temperature is interchanged; the sampling time point in the drying process can be before the drying judgment or after the drying is started.

According to one or more embodiments of the present invention, there is also provided a laundry judging device for a laundry treating apparatus, including a memory and a processor; the memory is used for storing computer programs; the processor is used for realizing the clothes drying judging method when executing the computer program.

According to one or more embodiments of the present invention, there is also provided a laundry treatment apparatus, which employs the above-described arbitration method, or includes the above-described arbitration device.

In accordance with one or more embodiments of the present invention, the control logic of the laundry arbitration scheme in the methods of the present invention can implement the processing of the flow as in the above methods of the present invention using encoded instructions (e.g., computer and/or machine readable instructions) stored on a non-transitory computer and/or machine readable medium (e.g., hard disk drive, flash memory, read-only memory, optical disk, digital versatile disk, cache, random access memory, and/or any other storage device or storage disk) in which information is stored for any period of time (e.g., for extended periods of time, permanent, transient instances, temporary cache, and/or information cache). As used herein, the term "non-transitory computer-readable medium" is expressly defined to include any type of computer-readable storage device and/or storage disk and to exclude propagating signals and to exclude transmission media.

According to one or more embodiments of the present invention, the laundry drying solution of the present invention may be implemented by using a control circuit, (control logic, main control system or control module), which may contain one or more processors, or may contain a non-transitory computer readable medium inside. In particular, the master control system or control module may comprise a microcontroller MCU. The processor implementing the processes of the present method may be such as, but not limited to, one or more single-core or multi-core processors. The processor(s) may include any combination of general-purpose processors and special-purpose processors (e.g., graphics processors, application processors, etc.). The processor may be coupled thereto and/or may include a memory/storage device and may be configured to execute instructions stored in the memory/storage device to implement various applications and/or operating systems running on the controller in accordance with the present invention.

The drawings referred to above and the detailed description of the invention, which are exemplary of the invention, serve to explain the invention without limiting the meaning or scope of the invention as described in the claims. Accordingly, modifications may be readily made by those skilled in the art from the foregoing description. Further, one skilled in the art may delete some of the constituent elements described herein without degrading performance, or may add other constituent elements to improve performance. Further, the order of the steps of the methods described herein may be varied by one skilled in the art depending on the environment of the process or apparatus. Therefore, the scope of the present invention should be determined not by the embodiments described above but by the claims and their equivalents.

While the invention has been described in connection with what is presently considered to be practical embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A laundry drying judging method for a laundry treating apparatus, comprising the steps of:

s1: when the clothes processing equipment enters a dry judging stage, detecting the power and the rotating speed of a drying fan in the clothes processing equipment at a set sampling frequency;

s2: obtaining a static pressure value of a drying system of the clothes processing equipment according to the power and the rotating speed of the drying fan under the sampling frequency, and detecting the frequency of a compressor;

s3: obtaining a dry judgment temperature difference of the clothes treatment equipment according to the weighing value of the weight of clothes in the clothes treatment equipment, the static pressure value and the frequency of a compressor;

s4: and when the dryness judging temperature difference is larger than the temperature difference between the air inlet and the air outlet of the clothes treatment equipment, determining that the clothes in the clothes treatment equipment are dried.

2. The method of claim 1, further comprising, before the step S1:

s0: when the laundry satisfies a drying condition, a weight of the laundry within the laundry treating apparatus is detected.

3. The method of claim 1, wherein the step S0 includes:

detecting the amount of water in the laundry treating apparatus when the laundry satisfies the drying condition, performing a weighing command and detecting the weight of the laundry in the laundry treating apparatus when the amount of water in the laundry treating apparatus is less than a preset threshold, opening a drain structure of the laundry treating apparatus when the amount of water in the laundry treating apparatus is greater than the preset threshold, and performing the weighing command and detecting the weight of the laundry in the laundry treating apparatus when the laundry treating apparatus reaches an empty tub of water.

4. The method of claim 1, wherein the step S2 includes: and obtaining the static pressure value of the drying system of the clothes treatment equipment according to the functional relation between the power and the rotating speed of the drying fan.

5. The method of claim 4, wherein the functional relationship is:

the static pressure value is aP + br + c;

wherein a is the power coefficient of the drying fan, P is the power of the drying fan, b is the rotation speed coefficient of the drying fan, c is a constant, and r is the rotation speed of the drying fan.

6. The method of claim 1, wherein the step S3 includes: and obtaining the dry judging temperature difference through a mapping relation table of the weighing value of the weight of the clothes in the clothes processing equipment, the static pressure value, the frequency of the compressor and the dry judging temperature difference, which are preset in the clothes processing equipment.

7. The method of claim 6, wherein the compressor frequency is a variable value in the mapping table.

8. The method of claim 6, wherein the compressor frequency is a fixed value in the mapping table.

9. The method of claim 1, after the step S3, when the dryness temperature difference is smaller than the temperature difference between the inlet and outlet of the laundry treatment apparatus, continuing to perform the steps S1-S2 until the dryness temperature difference is larger than the temperature difference between the inlet and outlet of the laundry treatment apparatus.

10. A clothes drying judging device for clothes processing equipment comprises a memory and a processor;

the memory is used for storing a computer program;

the processor, when executing the computer program, for implementing the method according to any of claims 1-9.

11. A laundry treatment apparatus, employing a method according to any of claims 1-9, or comprising a device according to claim 10.