JPS62243595A - Drying degree determining method in clothing dryer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) This invention relates to a method for determining dryness in a clothes dryer.

(Prior art) Conventionally, clothes dryers have been controlled temporally using time swings, but this temporal control is extremely difficult because it varies depending on the amount and type of items to be dried, the hot air temperature, etc. be.

The dryness detection device in conventional automatic clothes dryers is
There are methods that detect the humidity of clothing and convert it into an electrical signal, and methods that take advantage of the fact that the exhaust temperature rises rapidly as drying approaches completion, but both methods are limited to items that have been washed with water. .

(Problem to be solved by the invention) However, for clothes that have been washed using the dry cleaning method using organic solvents, a reliable clothes drying control device is required, but there is none in the past, and it is necessary to rely on the operator's eyes and senses. The reality is that there are.

As shown in the graph of FIG. 1, the exhaust temperature of the dryer 11 is divided over time into an initial preheating period T, a middle cautious period T2, and a final decreasing rate period T3.

First, Iseto focused on the decreasing rate period T3 at the end of the rising curve in the winter of 1985, read the temperature change during this period, entered it into the arithmetic function of the microcomputer, determined the numerical value, and determined the drying time. Although the dryer was configured to control the drying time, the temperature of the hot air is set in the dryer to protect the material to be dried, and depending on the set temperature of the hot air, etc., the curve
is not uniform and cannot be used at temperatures below 60°C, and items washed using the dry cleaning method do not have a temperature rise at the end (decrease rate period) and are only for laundry use.

Therefore, the applicant focused on the initial preheating period T1, and as a result of experiments, the temperature increase during the preheating period depends on the amount and type of clothes or the state of dehydration, regardless of the type or condition of the items to be dried. It was found that there was a corresponding change.

(See Figures 2 and 3.) This changes the initial preheating period.Experiments have revealed that if the temperature increase is replaced by a numerical value called the temperature increase rate, an appropriate drying time can be automatically set.

[Structure of the invention]

(Means for Solving the Problems) Therefore, the present invention captures the change in exhaust gas temperature during the preheating period T1 and can be applied to the dry cleaning method, improving a low-performance automatic control device with a narrow range of application. To provide a method for determining the degree of dryness in an automatic clothes dryer that has wide applicability to various types of items to be dried, is adaptable to changes in the amount of items to be dried, performs reliable drying, and is inexpensive. It is.

Hereinafter, an embodiment of the present invention will be described in detail. 1. In a clothes dryer, changes in the residual heat period T of the exhaust gas temperature inside the dryer are read, inputted into the arithmetic function of a microcomputer set in the dryer, and a numerical value is calculated. is determined, the drying time is determined according to this value, and the drying time is controlled based on this value.

The temperature increase that changes during the initial preheating period T1 is defined as the preheating period TI, which is several minutes from the initial stage.
If the temperature of the clothes dryer (when it starts) is 20 degrees Celsius, and the exhaust temperature after 4 minutes (Δt) from the initial stage is measured by a temperature sensor and is 40 degrees Celsius, then the temperature increase is 40 minus 20, which is 2.
It becomes 0.

The microcomputer has variable tables for Rowntree (washing with water) and drying (solvent), which can be changed by switching channels. The numerical value is 67. This value was determined as a result of repeated experiments.

In addition, the numerical value (in the case of strong 100% drying) in the dry cleaning method variable table is set to 57, which is 10 lower than that of washing with water.

Now, if you want to strongly (100%) dry clothes that have been washed in water, the initial temperature is 20°C, and the residual heat period T at the exhaust temperature is 40°C, then subtract the initial temperature of 20°C, and 20°C. Then, subtracting the numerical value 20 from the display 67 of the variable table of the microcomputer yields 47, subtracting the 4 minutes, 43, becomes the calculated numerical value, and this 43 becomes the drying time.

However, the starting temperature of a clothes dryer varies depending on the season and is not constant.

Therefore, in this experiment, the starting temperature was always 20
It was kept at ℃ and the values in the variable table were calculated.

Therefore, if the starting temperature exceeds 20°C, or falls below 20°C, corrections are made within the micro combinator using arithmetic functions. Moreover, the calculation method shown above is only an example of realization, and it can be realized using any other calculation method.

The temperature change during the preheating period T of the exhaust air temperature inside the dryer (1) can be read using a temperature sensor (
2), a large number of small holes (4) are drilled in the peripheral wall of the rotating body (3)
) This is done by detecting the exhaust heat flowing out from the exhaust gas.

〔Effect of the invention〕

According to this invention, the drying time is determined by a microcomputer using the temperature change of the exhaust air temperature in the dryer during the preheating period, so it can be applied to items to be dried using the dry cleaning method. It has a wide range of applications because it can accurately detect changes depending on the amount, type, and condition.
It has extremely beneficial effects, such as being able to perform everything from reliable complete drying to semi-drying.

[Brief explanation of drawings]

FIG. 1 is a graph showing the relationship between exhaust temperature and time in a dryer, and FIG. 2 is a graph showing a curve of exhaust temperature and temperature change up to 100% drying in the present invention. A is dry thin material, A' is dry thick material, A" is Rowntree thin material, and A is Rowntree thick material.
FIG. 3 is a graph showing a curve of temperature change up to 00% drying, and FIG.
Figure 4 is a graph showing the temperature change curves for the following cases: 8% dry matter was added, C' was 75% dry matter, and C'' was 30% dry matter. 5 is a flowchart showing an example of the method of using the present invention, and FIG. 5 is a sectional view showing the mounting location of the temperature sensor used in the present invention. ■...Dryer, 2...Temperature sensor , 3...Rotating cylinder, 4...Small hole, 5...Heat source, 6.6'...Motor, 7...Blower, T1...Preheating period of exhaust gas temperature, Δt... At the time of measurement, patent applicant Nippon Press Manufacturing Co., Ltd. Figure 3 △ Right Figure 1 Time - → Tsuneotsu Figure 5 Figure 4

Claims (1)

[Claims] In a clothes dryer, the residual heat period T of the exhaust temperature inside the dryer
A garment characterized in that the temperature or humidity change of __1 is read, inputted into the arithmetic function of a microcomputer set in the dryer, a numerical value is obtained, the drying time is determined according to this numerical value, and the drying time is thereby controlled. How to determine dryness in a dryer.