CN108930149A - A kind of method of clothing care machine detection clothes drying degree - Google Patents

Abstract

The invention relates to the field of clothes dryness detection methods, and specifically discloses a clothes care machine for clothes dryness detection method, comprising the following steps: detecting the background temperature, and detecting the clothes surface temperature at the clothes detection point; according to the background temperature and the clothes surface The temperature determines whether the clothes are dry. The present invention detects the background temperature and the clothes surface temperature at the clothes detection point, and judges whether the clothes are dry according to the background temperature and the clothes surface temperature. The method for detecting the dryness of clothes for a clothes care machine according to the invention solves the hysteresis problem existing in the clothes care machine using the existing dryness detection method, and improves the detection efficiency.

Description

A method for detecting the dryness of clothes for a clothes care machine

technical field

The invention relates to the field of methods for detecting the dryness of clothes, in particular to a method for detecting the dryness of clothes for a clothes care machine.

Background technique

In the existing clothes care machine, the clothes are hung in the treatment room, the clothes are ironed or deodorized by steam, and then dried by hot air, and the dryness detection is performed during the drying process to determine the dryness of the clothes. A conventional dryness detection method is: using a detection circuit to determine the dryness of the clothes by detecting changes in the electrical conductivity of the clothes.

However, when using clothes care for drying, the clothes are hung up, so the principle of conventional dryness detection cannot be used for detection, but the change of the temperature of the clothes is used to determine the degree of dryness of the clothes. , the absorbed heat is reduced, and the rate of change of the cylinder temperature will increase sharply. However, this detection has a hysteresis, and when a significant temperature change is detected, the clothes are often already dry. If the heat pump system is used to dry the clothes, the temperature change of the drum is not obvious due to the lower drying temperature; the temperature change of the heat pump system is added in time to assist in the determination, and the detection accuracy is not high.

Contents of the invention

The object of the present invention is to provide a method for detecting the dryness of clothes for a clothes care machine, so as to solve the hysteresis problem existing in the clothes care machine using the existing dryness detection method.

For reaching this purpose, the present invention adopts following technical scheme:

A method for detecting the dryness of clothes for a clothes care machine, comprising the following steps:

Detect the background temperature and the surface temperature of the clothing at the detection point of the clothing; judge whether the clothing is dry according to the difference between the background temperature and the surface temperature of the clothing.

As an optimal technical solution, it is judged whether the clothes are dry by comparing the difference between the background temperature and the surface temperature of the clothes, including:

Comparing the relationship between the number A and the preset number K of clothing detection points whose difference ΔT ₁ between the background temperature and the surface temperature of the clothes is greater than the first preset value T1; if A is smaller than K, it is determined that the clothes are dry.

As a preferred technical solution, if A is less than K, it is determined that the clothes are dry, including:

Calculate the clothing detection points whose difference ΔT ₁ between the background temperature and the clothing surface temperature is greater than the first preset value T1 and the corresponding number A;

Determine whether the A clothes detection points whose difference ΔT1 between the background temperature and the clothes surface temperature is greater than the _first preset value T1 are continuous;

If it is continuous, modify the preset number K;

If A is smaller than the corrected preset number K _t , it is determined that the clothes are dry.

As a preferred technical solution, if A clothing detection points whose difference ΔT ₁ between the background temperature and the surface temperature of the clothing is greater than the first preset value T1 are discontinuous, compare the number A of clothing detection points with the preset number The size relationship of the number K, if A is less than K, it is determined that the clothes are dry.

As a preferred technical solution, the determination of whether the clothes detection points whose difference ΔT1 between the A background temperature and the clothes surface temperature is greater than the _first preset value T1 is continuous includes:

Calculating the difference ΔT ₁ between the background temperature and the clothing surface temperature, which is greater than the first preset value T1, and the difference ΔT ₂ between the clothing surface temperature at the clothing detection point and the clothing surface temperature at the clothing detection points surrounding the clothing detection point;

If the difference ΔT ₂ is smaller than the second preset value T2, calculate the sum B of the number of surrounding clothing detection points whose difference ΔT ₂ is smaller than the second preset value T2;

If B is greater than or equal to αA, it is determined that the detection points of the clothes whose difference ΔT ₂ is smaller than the second preset value T2 are continuous; otherwise, it is determined that the clothes whose difference ΔT ₂ is smaller than the second preset value T2 The detection points are discontinuous.

As a preferred technical solution, the method for detecting the dryness of clothes for a clothes care machine according to claim 4 is characterized in that the corrected preset number K _t =A/N*K+C, wherein C is constant, and N is the total number of clothing detection points.

As a preferred technical solution, before calculating the difference ΔT1 between the background temperature and the surface temperature of the clothes, the detection points of the clothes that are greater than the _first preset value T1 and the corresponding number A further include:

Determine whether the background temperature is greater than the preset temperature, if the background temperature is greater than the preset temperature, then calculate the difference ΔT1 between the background temperature and the surface temperature of the clothes to be greater than the _first preset value T1 of the clothes detection points and the corresponding number A; otherwise Continue drying the laundry.

As a preferred technical solution, the surrounding clothing detection point of the clothing detection point refers to the clothing detection point with the smallest distance from the clothing detection point.

As a preferred technical solution, the total number of clothing detection points N=256, the preset number K=240; the first preset value T1=6°C, and the second preset value T2=2 °C, 1<α<8.

As a preferred technical solution, 2≤α≤5.

Beneficial effects of the present invention: the present invention judges whether the clothes are dry or not according to the difference between the background temperature and the clothes surface temperature by detecting the background temperature and the clothes surface temperature at the clothes detection point. The method for detecting the dryness of clothes for a clothes care machine according to the invention solves the hysteresis problem existing in the clothes care machine using the existing dryness detection method, and improves the detection efficiency.

Description of drawings

Fig. 1 is a flow chart of a method for detecting the dryness of clothes for a clothes care machine according to Embodiment 1 of the present invention;

Fig. 2 is a flow chart of the method for detecting the dryness of clothes by the clothes care machine according to the second embodiment of the present invention;

Fig. 3 is the first distribution diagram of the clothing detection points described in the second embodiment;

Fig. 4 is the second distribution diagram of the clothing detection points described in the second embodiment;

Fig. 5 is a flow chart of the method for detecting the dryness of clothes in the clothes care machine according to the third embodiment.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

The invention provides a method for detecting the dryness of clothes for a clothes care machine, which is mainly applied to a clothes care machine. The clothes care machine includes a body, one end is rotatably connected to the body, and the other end can be locked with the body. The unlocked door.

Embodiment one

Fig. 1 is a flow chart of the method for detecting the dryness of clothes for a clothes care machine in this embodiment. Referring to Fig. 1, the method for detecting the dryness of clothes for a clothes care machine in this embodiment is described in detail, which mainly includes the following steps:

S110. Detect the background temperature, and detect the surface temperature of the clothes at the clothes detection point.

The body of the clothing care machine is equipped with an infrared temperature detection module, through which the temperature signal of each detection point is detected, and the measured temperature signal is sent to the controller, which generates a corresponding temperature value.

Wherein, the upper inner wall that cannot be blocked by the clothes in the body is selected as the background temperature detection area, and the side of the clothes opposite to one of the two opposite side walls in the body is selected as the clothes surface temperature detection area. In this embodiment, there are N clothing detection points distributed in m rows and n columns in the clothing surface temperature detection area, where N=m*n=256, and there are several detection points in the background temperature detection area. For background temperature detection points, take the average value of the temperatures measured at several background temperature detection points as the background temperature.

Calculate the background temperature as T. Since the clothing detection points are distributed in m rows and n columns, the clothing surface temperature of each clothing detection point can be expressed as T(i, j), where i=1, 2, 3, .. ., m, j=1, 2, 3, . . . , n.

S120. Comparing the relationship between the background temperature and the preset temperature, if the background temperature is greater than the preset temperature, calculate the clothing detection points whose difference ΔT1 between the background temperature and the surface temperature of the clothes is greater than the _first preset value T1 and the corresponding individual A, otherwise continue dryness detection until the background temperature is greater than the preset temperature.

After starting to dry, affected by the moisture contained in the clothes, the surface temperature of the clothes rises slowly, while the upper inner wall of the nursing machine is not blocked by the clothes, so the temperature rises faster, that is, the background temperature rises faster, then the surface temperature of the clothes and The difference in background temperature will gradually become larger. When the clothes tend to be dry, the moisture in the clothes will decrease, and the surface temperature of the clothes will gradually approach the background temperature. Therefore, it is possible to determine whether the laundry is dry by determining the number of A's.

At the beginning of drying, affected by the moisture in the clothes, the surface temperature of the clothes is quite different from the background temperature. In order to reduce the invalid temperature detection, after many tests and verifications, in this embodiment, after the background temperature is greater than the preset temperature, the clothes start to dry. Clothes detection points whose difference ΔT1 between the background temperature and the surface temperature of the clothes is greater than the _first preset value T1 and the corresponding number A are calculated. The preset temperature in this embodiment is determined as T _preset = 50°C based on multiple tests. The preset temperature should not be too high. If the preset temperature is too high, the clothes may have been dried, and there is an excessive drying temperature; the preset temperature should not be too high. The set temperature should not be too low, because the clothes are relatively wet at the beginning of drying, and the surface of the clothes is low. If the preset temperature is low, the number of times of dryness detection is too high.

The first preset value T1=6°C, where the initial value of A is 0, and each clothing detection point satisfies the condition: the difference ΔT ₁ between the background temperature and the surface temperature of the clothes is greater than the first preset value T1, then A’s The value is correspondingly increased by 1, that is, A=A+1, until the conditions are determined for all the clothes detection points.

S130. If the difference ΔT1 between the background temperature and the clothes surface temperature is greater than the _first preset value T1 and the number A of clothes detection points is less than the preset number K, determine that the clothes are dry; otherwise, the clothes are not dry.

In this embodiment, the preset number K=16. When A is less than 16, it means that the surface temperature of the clothes at most of the clothes detection points is close to or equal to the background temperature, and the clothes can be considered to be dry.

If A is greater than 16, it means that there are too many clothes detection points with large deviations between the surface temperature of the clothes and the background temperature, and it is considered that the clothes are not dry, and step S120 needs to be continued until it is determined that the clothes are dry.

In this embodiment, by detecting the background temperature and the clothes surface temperature at the clothes detection point, and according to the number A and the preset number of clothes detection points whose difference ΔT1 between the background temperature and the clothes surface temperature is less than the _first preset value T1 The relationship of K determines whether the clothes are dry. The method for detecting the dryness of clothes for the clothes care machine described in this embodiment solves the hysteresis problem existing in the clothes care machine using the existing dryness detection method, and improves the detection efficiency.

Embodiment two

The method for detecting the dryness of clothes for a clothes care machine described in Embodiment 1 is mainly applicable to the N clothes detection points where the corresponding positions can be found on the dry clothes in the clothes care machine, that is, the area of the clothes to be dried is relatively large; but For clothes with a small area, some of the clothes detection points used to detect the surface temperature of the clothes are actually not covered by clothes, and the detected temperature is the temperature of the inner wall surface of the clothes care machine. For clothes with a small area, in the process of actually detecting the dryness of the clothes, when the clothes start to dry, the difference ΔT ₁ between the background temperature and the surface temperature of the clothes will be less than the first preset value T1. If the number is too high, it may cause a false judgment that the clothes are dry.

In view of the above situation, this embodiment modifies the preset number K. Due to the different thickness and materials of the clothes, the water evaporation rate will be inconsistent when the clothes are wet, so that the clothes surface temperature value of each clothes detection point is different, and the clothes surface temperature of the clothes detection point is different from the surrounding clothes detection of the clothes detection point. The difference in the temperature of the clothing surface is relatively large. As the clothes are gradually dried, the clothes surface temperature at the clothes detection point and the clothes surface temperature at surrounding clothes detection points of the clothes detection point will gradually approach, that is, the difference between the two will gradually decrease. Therefore, the preset number K can be corrected according to the temperature relationship between the clothing detection point and the surrounding clothing detection points of the clothing detection point.

Fig. 2 is a flow chart of the method for detecting the dryness of clothes for the clothes care machine described in this embodiment. Referring to Fig. 2, the method for detecting the dryness of clothes for the clothes care machine of the present embodiment is described in detail, which mainly includes the following steps:

S210. Detect the background temperature, and detect the surface temperature of the clothes at the clothes detection point.

S220. Comparing the relationship between the background temperature and the preset temperature, if the background temperature is greater than the preset temperature, calculate the clothing detection points whose difference ΔT1 between the background temperature and the surface temperature of the clothes is greater than the _first preset value T1 and the corresponding individual A, otherwise continue dryness detection until the background temperature is greater than the preset temperature.

S230. Determine whether the A clothing detection points whose difference ΔT1 between the background temperature and the surface temperature of the clothing is greater than the _first preset value T1 are continuous;

By determining whether it is continuous, it is determined whether the preset number needs to be corrected. Determining whether the A clothing detection points whose difference ΔT1 between the background temperature and the surface temperature of the clothing is greater than the _first preset value T1 are continuous includes the following steps:

S231. Calculate the difference ΔT ₁ between the background temperature and the clothing surface temperature ΔT 1 between the clothing surface temperature of the clothing detection point that is greater than the first preset value T1 and the clothing surface temperature of the clothing detection points surrounding the clothing detection point ΔT ₂ .

The surrounding clothing detection point of the clothing detection point refers to the clothing detection point with the smallest distance from the clothing detection point, which can be understood as being located at four positions above, below, left and right of the clothing detection point and close to the clothing detection point. Clothing detection points adjacent to the detection point.

Specifically, if the clothing surface temperature at each clothing detection point is T(i, j), where i=1, 2, 3, . . . , m, j=1, 2, 3, . . . , n.

If i=2, 3, 4, ..., m-1, j = 2, 3, 4, ..., n-1, the clothing surface temperatures of the surrounding clothing detection points of the clothing detection point are T (i, j-1), T(i, j+1), T(i-1, j), T(i+1, j).

If i=1, j=1, the surface temperatures of the clothing at the clothing detection points around the clothing detection point are T(1, 2), T(2, 1) respectively.

If i=1, j=n, the clothing surface temperatures of the clothing detection points around the clothing detection point are T(1,n−1), T(2,n) respectively.

If i=m, j=1, the clothing surface temperatures at the clothing detection points around the clothing detection point are T(m, 1) and T(m, 2) respectively.

If i=m, j=n, the clothing surface temperatures of the clothing detection points around the clothing detection point are T(m-1, n), T(m, n-1) respectively.

If i=1, j=2, 3, 4, ..., n-1, the clothing surface temperatures of the clothing detection points around the clothing detection point are T(i, j-1), T(i, j +1), T(i+1, j).

If i=2, 3, 4, ..., m-1, j=1, the clothing surface temperatures of the clothing detection points around the clothing detection point are respectively T(i, j+1), T(i-1 , j), T(i+1, j).

If i=m, j=2, 3, 4, . +1), T(i-1, j).

If i=2, 3, 4, ..., m-1, j=n, the clothing surface temperatures of the clothing detection points around the clothing detection point are T(i, j-1), T(i-1 , j), T(i+1, j).

S232. If the difference ΔT ₂ is smaller than the second preset value T2, calculate the sum B of the numbers of surrounding clothing detection points whose difference ΔT ₂ is smaller than the second preset value T2.

Wherein the first preset value T1=6°C, and the second preset value T2=2°C. Referring to Figure 3 and Figure 4, a total of 90 clothing detection points in 10 rows and 9 columns are used for illustration, wherein the solid circle indicates the clothing detection point where the difference ΔT ₁ between the background temperature and the surface temperature of the clothing is greater than the first preset value T1, The number of corresponding clothing detection points is A=16, and the hollow circle represents the clothing detection point where the difference between the background temperature and the clothing surface temperature ΔT ₁ is less than or equal to the first preset value T1, and the corresponding number of clothing detection points is D=74.

In Figure 3, the number of the 16 clothing detection points whose difference ΔT ₁ between the background temperature and the clothing surface temperature is greater than 6°C and the difference ΔT ₂ of the corresponding surrounding clothing detection points is less than 2°C is 2, 3, respectively. 3, 2, 3, 3, 2, 3, 3, 2, 3, 3, 4, 4, 4, 4, B=48 is calculated.

In Fig. 4, the number of 16 clothing detection points whose difference ΔT ₁ between background temperature and clothing surface temperature is greater than 6°C and the difference ΔT ₂ of the corresponding surrounding clothing detection points is less than 2°C is 0.

S233. If B is greater than or equal to αA, it means that the A clothes detection points whose difference ΔT ₁ between the background temperature and the clothes surface temperature is greater than 6°C are continuous; otherwise, determine the difference △T ₂ Clothes detection points less than 2°C are discontinuous.

If the A clothes detection points whose difference ΔT ₁ between the background temperature and the clothing surface temperature is greater than the first preset value T1 are continuous, it means that the distribution of these clothing detection points is relatively concentrated, and it can be considered that these clothing detection points The area formed by the points is the area of the clothing, that is, it is considered that the area of the clothing cannot completely cover all the clothing detection points.

After many tests and verifications, the value range of α is generally 1<α<8. As a further preferred solution, the value range of α can be limited to 2≤α≤5. The specific value of α depends on the total number of clothing detection points. The number is determined.

If α=2, in Fig. 3, B=48, αA=32, then B is greater than αA, explain 16 in Fig. 3 the difference ΔT ₁ of described background temperature and clothing surface temperature is greater than the first preset value T1 If the clothing detection points are continuous, it can be considered that the area indicated by the solid circle in Fig. 3 is the actual size of the clothing. In Fig. 4, B = 0, αA = 32, then B is less than 32, then it shows that the difference ΔT ₁ between the background temperature and the surface temperature of the clothes in Fig. If the space is discontinuous, it can be considered that the area represented by the solid circle and the hollow circle in Fig. 4 is the actual size of the clothes.

S240. If it is continuous, correct the preset number K; and compare whether the number A of clothing detection points is less than the corrected preset number K _t ; if A is smaller than K _t , determine that the clothes are dry; otherwise, the clothes are not dry.

The corrected preset number K _t =A/N*K+C, wherein C is a constant, and N is the total number of clothing detection points. In this embodiment, the corrected preset number K _t needs to be rounded to an integer. The smaller the clothes, the smaller the corresponding corrected preset number K _t .

S250. If not, compare the size relationship between the number A of detection points of the clothes and the preset number K; if A is less than K, determine that the clothes are dry; otherwise, the clothes are not dry.

Through the method for detecting the dryness of clothes for the clothes care machine described in this embodiment, by correcting the preset number K, it solves the misjudgment that the clothes are dry due to the small area of clothes that cannot completely cover all the clothes detection points The problem.

The parts in this embodiment that are the same as those in Embodiment 1 are not stated here, such as step S210, step S220 and comparing the relationship between A and K. For details, refer to Embodiment 1.

Embodiment Three

The difference between the present embodiment and the first embodiment is that according to the difference between the background temperature and the clothing surface temperature ΔT ₁ is greater than the first preset value T1, the ratio of the number of clothing detection points A to the N clothing detection points and The size relationship of the preset ratio judges whether the clothes are completely dried. Specifically, the preset ratio is K/N, if A/N<K/N, it is considered that the clothes are dry, otherwise the clothes are not dry.

The values of K and N described in this embodiment are the same as those in Embodiment 1, that is, K=16, N=256.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. A clothes care machine is characterized in that, comprises the following steps: Detect the background temperature and the surface temperature of the clothing at the detection point of the clothing; judge whether the clothing is dry according to the background temperature and the surface temperature of the clothing. 2. The method for detecting the dryness of clothes for a clothes care machine according to claim 1, wherein said judging whether the clothes are dry according to the background temperature and the surface temperature of the clothes comprises: Comparing the relationship between the number A and the preset number K of clothing detection points whose difference ΔT ₁ between the background temperature and the surface temperature of the clothes is greater than the first preset value T1; if A is smaller than K, it is determined that the clothes are dry. 3. The clothes care machine according to claim 2 is characterized in that, if A is less than K, then it is determined that the clothes are dry, comprising: Calculate the clothing detection points whose difference ΔT ₁ between the background temperature and the clothing surface temperature is greater than the first preset value T1 and the corresponding number A; Determine whether the A clothes detection points whose difference ΔT1 between the background temperature and the clothes surface temperature is greater than the _first preset value T1 are continuous; If it is continuous, modify the preset number K; If A is smaller than the corrected preset number K _t , it is determined that the clothes are dry. 4. The method for detecting the dryness of clothes for a clothes care machine according to claim 3, wherein if the difference ΔT ₁ between the background temperature and the surface temperature of the clothes is greater than the first preset value T1 of A clothes If the detection points are discontinuous, compare the size relationship between the number A of detection points of the clothes and the preset number K, and if A is smaller than K, it is determined that the clothes are dry. 5. The method for detecting the dryness of clothes for a clothes care machine according to claim 3, characterized in that, determining A clothes whose difference ΔT ₁ between the background temperature and the surface temperature of the clothes is greater than the first preset value T1 Whether the detection points are continuous, including: Calculating the difference ΔT ₁ between the background temperature and the clothing surface temperature, which is greater than the first preset value T1, and the difference ΔT ₂ between the clothing surface temperature at the clothing detection point and the clothing surface temperature at the clothing detection points surrounding the clothing detection point; If the difference ΔT ₂ is smaller than the second preset value T2, calculate the sum B of the number of surrounding clothing detection points whose difference ΔT ₂ is smaller than the second preset value T2; If B is greater than or equal to αA, it is determined that the detection points of the clothes whose difference ΔT ₂ is smaller than the second preset value T2 are continuous; otherwise, it is determined that the clothes whose difference ΔT ₂ is smaller than the second preset value T2 The detection points are discontinuous. 6. The method for detecting the dryness of clothes for a clothes care machine according to claim 5, characterized in that the corrected preset number K _t =A/N*K+C, wherein C is a constant, N is the total number of clothing detection points. 7. The method for detecting the dryness of clothes for a clothes care machine according to claim 3, characterized in that the difference ΔT ₁ between the calculated background temperature and the clothes surface temperature is greater than the first preset value T1 of the clothes detection point And before the corresponding number A also includes: Determine whether the background temperature is greater than the preset temperature, if the background temperature is greater than the preset temperature, then calculate the difference ΔT1 between the background temperature and the surface temperature of the clothes to be greater than the _first preset value T1 of the clothes detection points and the corresponding number A; otherwise Continue drying the laundry. 8 . The method for detecting the dryness of clothes for a clothes care machine according to claim 7 , wherein the surrounding clothes detection points of the clothes detection points refer to the clothes detection points with the smallest distance from the clothes detection points. 9. The method for detecting the dryness of clothes for a clothes care machine according to claim 8, characterized in that, the total number of said clothes detection points N=256, said preset number K=240; said first A preset value T1=6°C, the second preset value T2=2°C, 1<α<8. 10. The method for detecting the dryness of clothes for a clothes care machine according to claim 9, characterized in that 2≤α≤5.