CN108396530B - Drying judgment method for clothes dryer and clothes dryer - Google Patents
Drying judgment method for clothes dryer and clothes dryer Download PDFInfo
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- CN108396530B CN108396530B CN201710069253.8A CN201710069253A CN108396530B CN 108396530 B CN108396530 B CN 108396530B CN 201710069253 A CN201710069253 A CN 201710069253A CN 108396530 B CN108396530 B CN 108396530B
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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
- D06F58/30—Drying processes
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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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/08—Humidity
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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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/12—Temperature
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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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/28—Air properties
- D06F2103/36—Flow or velocity
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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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/16—Air properties
- D06F2105/24—Flow or velocity
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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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/28—Electric heating
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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
- D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
- D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
Abstract
The invention discloses a drying judgment method for a clothes dryer, and relates to the technical field of clothes dryers. The method comprises the following steps: collecting the temperature at the air outlet every X seconds, and recording the temperature value as a balance temperature value TempA1 in the current time when the number of times that a certain temperature value continuously appears is detected to be N; obtaining the relation between the balance temperature value TempA stored in the clothes dryer and the balance difference value delta T, and obtaining the balance difference value delta T1 corresponding to the balance temperature value TempA1 in the current time; and continuously heating, detecting and calculating the difference value between the temperature at the air outlet and the balance temperature value TempA1 in real time, and judging that the clothes are dried when the difference value is greater than or equal to the balance difference value delta T1. The invention also discloses a clothes dryer using the drying judgment method. The invention judges whether the drying of the clothes dryer is finished or not by utilizing the balance temperature value, and can dynamically correct the balance temperature value of the clothes dryer by detecting the temperature at the air outlet in real time, thereby greatly improving the control precision and the judgment accuracy of the clothes dryer.
Description
Technical Field
The invention relates to the technical field of clothes dryers, in particular to a clothes dryer drying judgment method and a clothes dryer using the same.
Background
A dryer is a home appliance for drying laundry, and generally has a function of automatically judging a drying degree, and automatically turns off a heating device after the laundry is dried, and stops drying. The existing drying control method of the clothes dryer mainly has the following forms: one is to adopt a humidity sensor to measure the humidity of the discharged air, and judge the drying degree of the dried clothes according to the humidity, thereby realizing automatic stop control; however, the clothes dryer adopting the method has the disadvantages of complex structure, complicated algorithm and high cost. The other method is to judge whether the clothes are sufficiently dried according to the weight change before and after the clothes are dried; however, in this control method, the clothes are made of different materials and have different water absorption properties, so that the judgment error is easily caused, and the drying effect of the clothes dryer is affected. Another method, which is more commonly used, is to detect a temperature change at an air outlet of the clothes dryer through an NTC (temperature sensor) to determine whether the temperature change reaches a drying set temperature of the clothes dryer, so as to control the drying process to stop or continue. In the method, the drying set temperature is a fixed value arranged in the clothes drying program and cannot be adjusted along with the change of the actual environment, so that the method has poor universality on the change of the environment temperature, has low judgment accuracy and is easy to cause insufficient drying or over-drying of the clothes.
Disclosure of Invention
Based on the above, an object of the present invention is to provide a method for determining whether drying of a clothes dryer is completed by using a balance temperature value, which uses a temperature sensor to detect a temperature value at an air outlet in real time and calculates a balance temperature value according with current reality in real time; and then, according to the obtained balance temperature value, calculating the degree of the clothes dryer still needing to be heated in the state, thereby accurately controlling the operation and the stop of the clothes dryer.
Another object of the present invention is to provide a dryer using the above dryer drying judgment method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a drying judgment method of a clothes dryer comprises the following steps:
step A: collecting the temperature at the air outlet every X seconds, and recording the temperature value as a balance temperature value TempA1 in the current time when the number of times that a certain temperature value continuously appears is detected to be N;
and B: obtaining the relation between the balance temperature value TempA stored in the clothes dryer and the balance difference value delta T, and obtaining the balance difference value delta T1 corresponding to the balance temperature value TempA1 in the current time;
and C: and continuously heating, detecting and calculating the difference value between the temperature at the air outlet and the balance temperature value TempA1 in real time, and judging that the clothes are dried when the difference value is greater than or equal to the balance difference value delta T1.
As a preferable scheme of the drying judgment method of the clothes dryer, before the step a, the following steps are further provided:
step A1: drying tests are carried out on different loads to obtain a drying temperature and time curve under each load;
step A2: calculating a balance temperature value TempA and an end point temperature value T corresponding to each load according to the drying temperature and time curve;
step A3: and calculating the balance difference value delta T corresponding to each balance temperature value TempA according to a formula T ═ TempA + deltaT.
As a preferable scheme of the drying judgment method of the clothes dryer, after the step a and before the step B, the following steps are further provided:
step A4: and continuously collecting the temperature at the air outlet, and recording the temperature value as TempA1 again if the continuous occurrence frequency of a certain temperature value is detected to be more than the occurrence frequency of the last TempA 1.
As a preferable configuration of the drying judgment method for the dryer, in the step a, if the TempA1 is not obtained in a certain set time period, the temperature value with the largest occurrence frequency in the time period is recorded as TempA 1.
As an optimal scheme of the drying judgment method for the clothes dryer, in the step a, the value of X is adjusted according to models with different structures, and the value range is as follows: x is more than or equal to 1 and less than or equal to 30.
As an optimal scheme of the drying judgment method for the clothes dryer, in the step a, the value of N is adjusted according to different load types and load weights, and the value range is as follows: n is more than or equal to 3 and less than or equal to 15.
As a preferable scheme of the drying judgment method of the clothes dryer, in the step a, for a large load, when the number of times that a certain temperature value continuously appears is detected to be N, the temperature value is recorded as a current equilibrium temperature value TempA 1; for a small load, when the number of times that a certain temperature value continuously appears is detected to be N-a, recording the temperature value as a current balance temperature value TempA 1; where a is the test constant.
As a preferable scheme of the drying judgment method for the clothes dryer, in the step B, a relationship between the balance temperature value TempA and the balance difference value Δ T is as follows: when TempA is more than or equal to 40 ℃ and less than or equal to 42 ℃, the delta T is 24 ℃; when TempA is more than or equal to 43 ℃ and less than or equal to 46 ℃, the delta T is 21 ℃; when TempA is more than or equal to 47 ℃ and less than or equal to 50 ℃, the delta T is 16 ℃.
As a preferable scheme of the drying judgment method of the clothes dryer, a temperature sensor is installed at an air outlet of a roller of the clothes dryer and used for detecting the air outlet temperature of the clothes dryer.
The invention also provides a clothes dryer which performs drying by using the clothes dryer drying judgment method.
The invention has the beneficial effects that:
firstly, the invention judges whether the drying of the clothes dryer is finished or not by utilizing the balance temperature value, comprehensively considers the influences of factors such as load size, clothes material, environment temperature, moisture content after drying and the like, and can correct the balance temperature value of the clothes dryer at any time by detecting the temperature at the air outlet in real time, thereby greatly improving the control precision and the judgment accuracy of the clothes dryer. Secondly, the current balance temperature value is determined according to the continuous occurrence frequency of a certain temperature value in the current time period, the balance temperature value is a dynamic value which accords with the current actual state, the degree of the clothes dryer which still needs to be heated in the current balance state can be calculated according to the balance temperature value, and the operation and the stop of the clothes dryer can be accurately and conveniently controlled.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a graph of drying temperature versus time according to an embodiment of the present invention.
Fig. 2 is another graph of drying temperature versus time according to the embodiment of the present invention.
Fig. 3 is a flowchart of a dryer drying judging method according to an embodiment of the present invention.
Fig. 4 is a flowchart illustrating the determination of the equilibrium temperature value TempA1 according to the embodiment of the present invention.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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.
As shown in fig. 1 to 4, the present embodiment provides a preferable drying judgment method for a clothes dryer, so as to solve the problem that the existing clothes dryer is influenced by external environment during drying, and cannot accurately judge the drying time of clothes, thereby causing over-wet or over-dry of clothes. Specifically, the drying judging method includes steps 1 to 3 performed before the use of the dryer, and steps 4 to 11 performed during the use of the dryer.
Step 1: firstly, selecting different loads to carry out a drying test to obtain a curve of the corresponding relation between the drying temperature and the heating time under each load;
the clothes dryer tests the time and the temperature in the drum when a plurality of loads are dried through experiments, and is connected into a smooth curve according to a plurality of groups of coordinate points of the drying temperature and the time, wherein the smooth curve is one part of a quadratic function curve. As shown in fig. 1 and 2, drying temperature-time curves are given for three different loads (load 1 < load 2 < load 3), wherein phase 1 is the initial heating phase and the exhaust temperature of the dryer rises significantly; stage 2 is a stable drying stage, and the exhaust temperature of the clothes dryer is stable; stage 3 is a stage where drying is about to end, and the exhaust temperature of the dryer is significantly increased. After the drying temperature-time curve is obtained, the clothes dryer calculates a corresponding relation formula of time and drying temperature of each load in a drying state, the formula is stored in a main control panel of the clothes dryer, and the formula can be directly called in the drying process.
Step 2: according to the curve of the drying temperature and the drying time, calculating a balance temperature value TempA and an end point temperature value T corresponding to each load;
here, since the temperature in the stage 2 is relatively stable, the temperature with the largest occurrence frequency in the process is taken as the equilibrium temperature value TempA, and the temperature value corresponding to the drying end point in the stage 3 is taken as T, so that the end point temperature values T corresponding to different equilibrium temperature values TempA are obtained.
And step 3: let Δ T be T-TempA, thereby calculating the balance difference Δ T corresponding to each balance temperature value TempA.
And 4, step 4: and switching on the power supply of the clothes dryer and starting the clothes dryer.
And 5: collecting the temperature at the air outlet every X seconds, and recording the temperature value as a balance temperature value TempA1 in the current time when the number of times that a certain temperature value continuously appears is detected to be N;
specifically, the clothes dryer is provided with the temperature sensor at the air outlet of the roller, and the temperature sensor can be used for detecting the air outlet temperature of the clothes dryer in real time. Here, the value of X in "every X seconds" is adjusted according to models of different structures, and the value range is generally: x is 1 ≦ 30, and this embodiment is preferably acquired every 10 seconds. In addition, the value of N can be adjusted according to different load types and load weights, and the value range is as follows: n is more than or equal to 3 and less than or equal to 15, and the preferred N in the embodiment is 6-8.
It should be noted that, for a large load, when it is detected that the number of times that a certain temperature value continuously appears is N, the temperature value is recorded as a current equilibrium temperature value TempA 1; for a small load, when the number of times that a certain temperature value continuously appears is detected to be N-a, the temperature value is recorded as a current balance temperature value TempA 1; that is, the number of times of judging a large load is larger than that of judging a small load, where a is a constant taken during the test.
Step 6: and continuously collecting the temperature at the air outlet, and recording the temperature value as TempA1 again if the continuous occurrence frequency of a certain temperature value is detected to be more than the occurrence frequency of the last TempA 1.
For example, during the drying process, 40 ℃ is detected to occur 6 times consecutively for the first time, and the temperature is determined as the equilibrium temperature value TempA1, but during the subsequent process, 41 ℃ is detected to occur 10 times consecutively, which indicates that the temperature of 41 ℃ is more stable than 40 ℃, and thus 41 ℃ is defined as the equilibrium temperature value TempA1 again. Of course, if the TempA1 is not obtained within a certain set time period, the temperature value that appears most frequently within the time period is referred to as TempA 1.
And 7: obtaining the relation between the balance temperature value TempA stored in the clothes dryer and the balance difference value delta T, and obtaining the balance difference value delta T1 corresponding to the balance temperature value TempA1 in the current time;
specifically, since the equilibrium temperature value TempA in the drying process is generally between 40 ℃ and 50 ℃, the embodiment performs the test with the temperature change of an integer value in this interval, and the relationship between the equilibrium temperature value TempA after the test and the equilibrium difference value Δ T is as follows: when TempA is more than or equal to 40 ℃ and less than or equal to 42 ℃, the delta T is 24 ℃; when TempA is more than or equal to 43 ℃ and less than or equal to 46 ℃, the delta T is 21 ℃; when TempA is more than or equal to 47 ℃ and less than or equal to 50 ℃, the delta T is 16 ℃. Therefore, in this step, the corresponding balance difference Δ T1 can be obtained quickly by determining the interval in which the balance temperature value TempA1 is located.
And 8: and continuously heating, detecting and calculating the difference value between the temperature at the air outlet and the balance temperature value TempA1 in real time, and judging that the clothes are dried when the difference value is greater than or equal to the balance difference value delta T1.
This step is equivalent to stage 3 in fig. 2, and Δ T1 is continuously increased on the basis of the equilibrium temperature value TempA1, so that the drying standard is reached. Here, the drying end point is judged according to the balance temperature value TempA1 instead of depending on external factors such as load size, so that the influence of load weight, material, ambient temperature, humidity and the like on drying judgment is avoided, and the working reliability of the clothes dryer is greatly improved. The clothes dryer determines the current balance temperature value according to the continuous occurrence times of a certain temperature value in the current time period, the balance temperature value is a dynamic value which accords with the current actual state, the degree of the clothes dryer which still needs to be heated in the current balance state can be calculated according to the balance temperature value, and the operation and the stop of the clothes dryer can be controlled more accurately and more conveniently.
And step 9: and after drying is finished, blowing cold air into the inner cavity of the clothes dryer until the temperature of the load is reduced to a set value.
In this step, the cooling setpoint is generally between 38 ℃ and 45 ℃ and preferably 40 ℃.
Step 10: and (5) alarming and prompting the clothes dryer, and alarming for 5 minutes.
The alarm in this embodiment includes a buzzer sound and a digital tube flashing. Specifically, the buzzer buzzes for 10 seconds every 2 minutes, and the buzzing frequency is 1 second ON and 1 second OFF; the frequency of the charactron flash was 0.5 seconds ON, 0.5 seconds OFF. The clothes taking device can remind a user to take out clothes in time through alarming so as to prevent the clothes from wrinkling and unevenness.
Step 11: the clothes dryer is automatically powered off and shut down.
If the user does not perform other operations within the set time, the clothes dryer is automatically powered off and shut down, so that the waste of resources and the potential safety hazard of the clothes dryer are reduced.
The present embodiment also provides a dryer that performs a drying work using the drying determination method as described above. The invention judges whether the clothes dryer finishes drying or not by using the balance temperature value, comprehensively considers the influences of factors such as load size, clothes material, environment temperature, moisture content after drying and the like, and can correct the balance temperature value of the clothes dryer at any time by detecting the temperature at the air outlet in real time, thereby greatly improving the control precision and the judgment accuracy of the clothes dryer.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A drying judgment method for a clothes dryer is characterized by comprising the following steps:
step A1: drying tests are carried out on different loads to obtain a drying temperature and time curve under each load;
step A2: calculating a balance temperature value TempA and an end point temperature value T corresponding to each load according to the drying temperature and time curve;
step A3: calculating a balance difference value delta T corresponding to each balance temperature value TempA according to a formula T ═ TempA + < delta > T;
step A: collecting the temperature at the air outlet every X seconds, and recording the temperature value as a balance temperature value TempA1 in the current time when the number of times that a certain temperature value continuously appears is detected to be N;
and B: obtaining the relation between the balance temperature value TempA stored in the clothes dryer and the balance difference value delta T, and obtaining the balance difference value delta T1 corresponding to the balance temperature value TempA1 in the current time;
and C: and continuously heating, detecting and calculating the difference value between the temperature at the air outlet and the balance temperature value TempA1 in real time, and judging that the clothes are dried when the difference value is greater than or equal to the balance difference value delta T1.
2. The drying judgment method for the clothes dryer according to claim 1, wherein after the step A and before the step B, further comprising:
step A4: and continuously collecting the temperature at the air outlet, and recording the temperature value as TempA1 again if the continuous occurrence frequency of a certain temperature value is detected to be more than the occurrence frequency of the last TempA 1.
3. The drying judgment method of the dryer as claimed in claim 1, wherein in the step a, if the TempA1 is not obtained in a certain set time period, the temperature value with the largest occurrence frequency in the time period is recorded as TempA 1.
4. The drying judgment method for the clothes dryer according to claim 1, wherein in the step a, the value of X is adjusted according to models with different structures, and the value range is as follows: x is more than or equal to 1 and less than or equal to 30.
5. The drying judgment method of the clothes dryer according to claim 1 or 4, wherein in the step A, the value of N is adjusted according to different load types and load weights, and the value range is as follows: n is more than or equal to 3 and less than or equal to 15.
6. The drying judgment method of the clothes dryer according to claim 5, wherein in the step A, when the number of times that a certain temperature value appears continuously is detected as N, the temperature value is recorded as a current equilibrium temperature value TempA 1; for a small load, when the number of times that a certain temperature value continuously appears is detected to be N-a, recording the temperature value as a current balance temperature value TempA 1; where a is the test constant.
7. The drying judgment method of the clothes dryer according to claim 1, wherein in the step B, the relationship between the balance temperature value TempA and the balance difference Δ T is: when TempA is more than or equal to 40 ℃ and less than or equal to 42 ℃, the delta T is 24 ℃; when TempA is more than or equal to 43 ℃ and less than or equal to 46 ℃, the delta T is 21 ℃; when TempA is more than or equal to 47 ℃ and less than or equal to 50 ℃, the delta T is 16 ℃.
8. The drying judgment method for the clothes dryer according to claim 1, wherein a temperature sensor is installed at an air outlet of the drum of the clothes dryer for detecting an air outlet temperature of the clothes dryer.
9. A clothes dryer characterized in that the clothes dryer performs drying using the clothes dryer drying judgment method according to any one of claims 1 to 8.
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| JP2007075189A (en) * | 2005-09-12 | 2007-03-29 | Toshiba Corp | Clothes dryer |
| CN1955370A (en) * | 2005-10-27 | 2007-05-02 | 海尔集团公司 | Drying decision device and method of drier |
| CN104344493A (en) * | 2013-07-25 | 2015-02-11 | 珠海格力电器股份有限公司 | Method and device for detecting falling of exhaust temperature sensing bulb and air conditioner |
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| CN104990326A (en) * | 2015-06-26 | 2015-10-21 | 青岛海尔股份有限公司 | Refrigerator and temperature measuring method based on infrared sensors |
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