WO2016188265A1 - Automatic drying judgement method for clothes dryer and clothes dryer - Google Patents

Abstract

Disclosed are an automatic drying judgement method for a clothes dryer and a clothes dryer. The clothes dryer is internally provided with a correlation between a time t and a temperature T1 of all loads at a drying state; in a drying process, the clothes dryer detects a temperature value T2 in a barrel in real time and compares the temperature value with a pre-set temperature value T1 corresponding to the time; and when the real-time detected temperature value T2 is greater than or equal to the pre-set temperature value T1 corresponding to the time, clothes in the barrel are judged to be dried. The judgement method realizes quantitative judgement of continuous loads, can accurately judge the drying state of any load and guarantees drying effect of the clothes dryer in any load.

Description

Drying machine automatic drying judging method and clothes dryer Technical field

The invention relates to the field of dry clothes, in particular to a method for judging the automatic drying of a clothes dryer and a clothes dryer.

Background technique

Generally, the dry clothes machine installs an NTC (thermistor) at the outlet of the drum. The automatic drying judgment using NTC is an important branch of the automatic drying control of the dryer. With the drying, the NTC has Figure 1. The characteristic of the curve shown, phase 1 is the start of the heating phase, the exhaust gas temperature rises significantly; phase 2 is the stable drying phase, the exhaust gas temperature is stable; phase 3 is the phase where the drying is about to end, and the exhaust gas temperature rises significantly.

The general method is to take the temperature value of the stage 2 as the stable temperature value T2, take the temperature value T3 of the stage 3, and let δT=T3-T2. For the specific model, the specific load, the test measures the degree of drying of the clothes under different δT. To achieve automatic drying control. The disadvantage of this method is that the amount of the clothes has a relatively large influence on the drying effect, which is often more clothes, and the drying effect is better when the load is close to full load, and when the clothes are small, the drying effect is poor, often it is not baked. dry. It is also possible to carry out drying test on different amounts of clothes, and obtain several ranges. The corresponding range is selected according to the amount of dried clothes to determine the drying state, but only the range is taken, only discrete points can be detected, and Includes all loads.

The present invention has been made in view of this.

Summary of the invention

The object of the present invention is to overcome the deficiencies of the prior art and to provide a method for judging the automatic drying of a clothes dryer.

In order to achieve the object, the present invention adopts the following technical solution: a method for judging the automatic drying of the dryer, and setting the correspondence between the time t and the temperature T1 of all the loads in the drying state in the dryer; drying in the drying process The machine detects the temperature value T2 in the cylinder in real time and compares it with the set temperature value T1 corresponding to the time; when the real-time detection temperature value T2 is greater than or equal to the set temperature value T1 corresponding to the time, it is determined that the laundry in the barrel is dried. .

The correspondence between the time t and the temperature T1 of all the loads in the dry state is a quadratic function relationship.

The quadratic function is a quadratic function with an opening upward, and the corresponding relationship between the time t and the temperature T1 of the all loads in the dry state is the left part of the apex of the quadratic function.

The dryer calculates the curve formula of the quadratic function through experimental test, and stores the curve formula in the dryer main control board. Inside, the curve formula is directly taken during the drying process.

The dryer tests the time t of the plurality of loads and the temperature T1 in the cylinder through experiments, and forms a smooth curve according to the plurality of sets of time t and the temperature T1 in the cylinder, and the smooth curve is a quadratic function curve, and the second is determined. Function curve formula.

The dryer tests the time t of the at least three loads drying and the temperature T1 in the cylinder through experiments, and determines a quadratic function curve formula according to the three sets of time t and the temperature T1 in the cylinder.

A temperature sensor is arranged at the air outlet of the dryer drum to detect the temperature inside the cylinder in real time.

The correspondence between time t and temperature T1 of all loads in the dry state is: T1 = at ² + bt + c, where a, b, c are constants, the constant and the maximum load, heating power, and wind speed of the dryer Related to the temperature control system.

With the difference in ambient temperature, the value of c is corrected, and the ambient temperature is measured at the beginning of drying. The ambient temperature is T3, then: c=72-T3*0.9.

The present invention also provides a clothes dryer having the above method.

After adopting the technical solution described in the present invention, the following beneficial effects are brought about:

The quadratic function curve in the judging method of the present invention includes the correspondence between time and temperature of all loads in the drying state, as long as the drying process temperature curve of the laundry intersects with the quadratic function, the laundry is dried, that is, when When the temperature in the cylinder is greater than or equal to the temperature on the quadratic function curve corresponding to the time, the internal laundry can be judged to be dried, and the quantitative judgment of the continuous load is realized, and the accurate drying state can be judged for any load, and the dryer is ensured. Drying effect of any load.

DRAWINGS

Figure 1: Drying curve in the prior art;

Figure 2: A drying curve diagram in the judging method of the present invention;

Figure 3 is a flow chart of the determination method of the present invention.

detailed description

The specific embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

The invention relates to a method for judging automatic drying of a clothes dryer, and setting a correspondence relationship between time t and temperature T1 of all loads in a drying state in a dryer; in the drying process, the dryer detects the temperature value in the cylinder in real time. T2, and compares with the set temperature value T1 corresponding to the time; when the real-time detection temperature value T2 is greater than or equal to the set temperature value T1 corresponding to the time, Dry the clothes in the broken barrel. This kind of judgment method can judge the accurate drying state for any load, and guarantee the drying effect of the dry load of any dryer.

The correspondence between the time t and the temperature T1 of all the loads in the dry state is a quadratic function relationship, which is consistent with T1=at ² +bt+c, where a, b, and c are constants. The a, b, c correspond to the maximum load or capacity, heating power, wind speed and temperature control system of the dryer. That is, each model corresponds to a group a, b, and c, and each model has a correspondence function of a quadratic function.

After extensive research and experimental research, different amounts of clothing (such as 0.5, 1, 2, 4, 6kg of clothing) were tested for drying, and the drying process temperature curve shown in Figure 2 was obtained. The temperature value at the time is identified in the above figure and is connected into a curve. The curve is a quadratic function, and the quadratic function also covers the relationship between the time and the temperature when the amount of undetected laundry is dried, so the second time The function curve contains the correspondence between time and temperature of all loads in the dry state, as long as the drying process temperature curve of the laundry intersects with the quadratic function, the laundry is dried, that is, when the temperature inside the cylinder is greater than or equal to the time corresponding to the time When the temperature on the quadratic function curve is used, the internal laundry can be judged to be dried. This kind of judgment method realizes the quantitative judgment of the continuous load, can judge the accurate drying state for any load, and guarantee the drying of the dryer with any load. effect.

The drying machine obtains the curve formula of the quadratic function through experimental test, and stores the curve formula into the main control board of the dryer, and directly adopts the curve formula during the drying process, when the temperature in the cylinder is greater than or equal to the time corresponding to When the temperature on the quadratic function curve is determined, the internal laundry can be judged to be dried.

Before the dryer is shipped from the factory, the dryer of this model is tested by experiment to test the time t of the at least three loads and the temperature T1 in the cylinder, and determine the quadratic function curve formula according to the three sets of time t and the temperature T1 in the cylinder. . When the temperature in the cylinder is greater than or equal to the temperature on the quadratic function curve corresponding to the time, the internal laundry can be judged to be dried.

The dryer tests the time t of the plurality of loads and the temperature T1 in the cylinder through experiments, and forms a smooth curve according to the plurality of sets of time t and the temperature T1 in the cylinder, and the smooth curve is a quadratic function curve, and the quadratic function The curve includes the correspondence between time and temperature of all loads in the dry state, as long as the drying process temperature curve of the laundry intersects with the quadratic function, the laundry is dried, that is, when the temperature in the cylinder is greater than or equal to the time corresponding to the time When the temperature on the quadratic function curve is used, the internal laundry can be judged to be dried, and the quadratic function curve formula is determined and stored in the main control panel of the dryer. The curve formula is directly obtained during the drying process, when the temperature in the cylinder is greater than When the temperature on the quadratic function curve corresponding to the time is equal to, the internal laundry can be judged to be dried.

A temperature sensor is arranged at the air outlet of the dryer drum to detect the temperature inside the cylinder in real time. Preferably, the dryer outlet of the dryer drum is provided with an NTC (thermistor).

The quadratic function appears at different positions in the coordinate system with different ambient temperature, and the tested c value is linear with 0.9 times T3. With the difference in ambient temperature, the value of c is corrected, and the ambient temperature is measured at the beginning of drying. The ambient temperature is T3, then: c=72-T3*0.9. The corrected quadratic function is more accurate and more accurate in obtaining accurate drying end points for different weights of clothing.

The invention relates to a clothes dryer using the above-mentioned judging method, a temperature sensor is arranged at the air outlet of the dryer drum, and the temperature in the detection cylinder is detected in real time. Before the dryer is shipped from the factory, the dryer of the model is experimentally tested. The correspondence between time t and temperature T1 of all loads in the dry state is a quadratic function curve formula, which is stored in the main control panel of the dryer. During the drying process, the dryer detects the temperature value T2 in the cylinder in real time. The curve formula is directly retrieved and compared with the set temperature value T1 corresponding to the time; when the real-time detection temperature value T2 is greater than or equal to the set temperature value T1 corresponding to the time, the laundry in the barrel is judged to be dried. The time function t of the three loads drying and the temperature T1 in the cylinder can be experimentally tested by the dryer of this model, and the quadratic function curve formula is determined according to the three sets of time t and the temperature T1 in the cylinder.

Embodiment 1

The invention relates to a 6kg drying capacity straight-line dryer, rated voltage 220V/50Hz, heating power 1800W, control exhaust temperature not exceeding 60 degrees Celsius, intake air temperature not exceeding 120 degrees Celsius, design maximum air volume 150 cubic meters Millimeter per hour, through the test, the quadratic function T1=at ² +bt+c, where a=0.0009, b=-0.2035, c=50.0000, that is, the quadratic function T1=0.0009t ² +0.2035t is obtained through testing. +50.0000, 0 < t ≤ 110.

Presetting this formula in the main control panel of the dryer can achieve an accurate drying end point for different weights of clothing. It should be noted that the a, b, and c constants in the formula are tested at an ambient temperature of 20 degrees Celsius. The c value needs to be corrected as the ambient temperature is different. The ambient temperature is measured when the machine starts to operate, and the ambient temperature is T3. Then: c=72-T3*0.9. The reason why the value of c is calculated is that the quadratic function appears at different positions in the coordinate system with the difference of the ambient temperature, and the tested c value is linear with 0.9 times of T3. The corrected quadratic function is more accurate and more accurate in obtaining accurate drying end points for different weights of clothing.

The above is only a preferred embodiment of the present invention, and it should be noted that various modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention. The scope of protection of the invention.

Claims (10)

A method for judging the automatic drying of a clothes dryer, characterized in that: Corresponding relationship between time t and temperature T1 of all loads in the drying state is set in the dryer; During the drying process, the dryer detects the temperature value T2 in the cylinder in real time and compares it with the set temperature value T1 corresponding to the time; When the real-time detection temperature value T2 is greater than or equal to the set temperature value T1 corresponding to the time, the laundry in the tub is judged to be dried. The method for determining the automatic drying of the dryer according to claim 1, wherein the correspondence between the time t and the temperature T1 of the all loads in the dry state is a quadratic function relationship. The method for judging automatic drying of a clothes dryer according to claim 2, wherein the quadratic function is a quadratic function of an opening upward, and the time t and the temperature T1 of the load in the dry state. The corresponding relationship curve is the left part of the vertices of the quadratic function. The method for judging automatic drying of a clothes dryer according to any one of claims 1-3, characterized in that: the drying machine obtains the correspondence between the time t and the temperature T1 of all the loads in the dry state through experimental tests. Formula, the formula is stored in the main control panel of the dryer, and the formula is directly taken during the drying process. The method for judging automatic drying of a clothes dryer according to any one of claims 1 to 4, characterized in that: the dryer tests the time t of the drying of the plurality of loads and the temperature T1 in the cylinder through experiments, according to the The group time t and the temperature T1 in the cylinder are connected to form a smooth curve, and the smooth curve is a quadratic function curve, and the quadratic function curve formula is determined. The method for judging automatic drying of a clothes dryer according to claim 2 or 3, characterized in that: the dryer tests the time t of the drying of at least three loads and the temperature T1 in the cylinder through experiments, according to the three groups The time t and the temperature T1 in the cylinder determine the quadratic function curve formula. The method for judging the automatic drying of the clothes dryer according to any one of claims 1 to 6, characterized in that: the air outlet of the dryer drum is provided with a temperature sensor, and the temperature inside the cylinder is detected in real time. The method for judging automatic drying of a clothes dryer according to any one of claims 1 to 7, characterized in that: the correspondence between time t and temperature T1 of all loads in the dry state is: T1 = at ² + bt + c, where a, b, and c are constants. The method for judging automatic drying of a clothes dryer according to claim 8, wherein the c value is corrected according to different ambient temperatures, and the ambient temperature is measured at the start of drying, and the ambient temperature is T3. Then: c=72-T3*0.9. A clothes dryer having the method of any of claims 1-9.

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