JPS6311197A - 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 FIELD OF INDUSTRIAL APPLICATION The present invention relates to a clothes dryer for general household use.

2. Description of the Related Art Conventionally, this type of clothes dryer detects the drying exhaust temperature, determines the end point of drying, and displays the approximate time from the detection until the end of drying, as disclosed in Japanese Patent Laid-Open No. 61-37297.
It is known from the G publication. In the clothes dryer S described in the same publication, at the start of drying, the temperature rises from near room temperature to the temperature required for evaporation of moisture (in the preheating range), and then the heat supplied and the heat required to turn into steam are A constant temperature is maintained in equilibrium (constant rate drying region), then the amount of steam decreases and the supplied heat is exhausted as is (lapse rate drying region), and the exhaust heat increases. The dry state is detected by detecting the change in humidity when it changes from the constant rate drying area to the decreasing rate drying area, and this determines the remaining time, but the remaining time is not accurately displayed until the end. I can't.

Problems to be Solved by the Invention If the clothes dryer is of the type that automatically stops heating when drying is finished, it may not be necessary to display the time until the end of drying. There is a strong desire to know the drying time for convenience. However, when displaying the remaining time after detecting the dry state as described above,
It could not be displayed until 10 to 15 minutes before the end of drying. This is too short in terms of housework arrangements and cannot satisfy the user's needs.

The present invention is intended to solve these problems, and aims to make it possible to know the approximate end time at an early point after the start of operation, and to facilitate the preparation of housework.

Means for Solving the Problems In order to solve this problem, the present invention provides a rotating drum for storing clothes, a heat source for drying the clothes in the drum, and a system for transferring heat from the heat source into the drum. Equipped with a fan to guide and discharge the exhaust gas, a sensor to detect the temperature of the exhaust gas discharged from the drum, and a time display device, it is proportional to the time from the start of operation until the exhaust temperature becomes constant in the constant rate drying region. The time required for drying is displayed on the time display device.

Effect: With this configuration, the user can know the approximate end time at a relatively early point in time when starting the operation.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings.

In Fig. 1, 1 is the main body of the clothes dryer;
A drum 2 in which clothes are placed and rotated is provided inside. A heat source 5 fixed by a heater cover 4 is provided between the main body 1 and a curved plate 3 fixed to the main body 1 in order to rotatably support and cover the front part of the drum 2. 6
is a fan for passing air through the heat source 5 and guiding it into the drum 2 as hot air to remove moisture from clothing and exhaust the moist air to the outside of the gate. A sensor 7 is provided for detecting the temperature of the exhaust gas, and a control display device 9 is provided for controlling the heat source 5 and the motor 8 based on the temperature detection by the sensor 7, and for displaying the remaining time. ing. The motor 8 is for driving the drum 2 and the fan 6.

To explain the operation of the above configuration, when clothes are placed in the drum 2 and the power is turned on, the heat source 5 is heated, the motor 8 rotates the drum 2 and the fan 6, and hot air enters the drum 2 and removes moisture from the clothes. and is ejected from the aircraft. At this time, the sensor 7 detects the temperature of the exhaust gas. As shown in Figure 2, the temperature of the exhaust gas initially rises from near room temperature to the temperature required for a moisture nuclear power plant (in the preheating range), after which the supplied heat and the heat required to turn into steam are in balance. and a constant temperature is maintained (constant rate drying region). As the clothes dry, the amount of steam decreases and the supplied heat is directly discharged into the steam, causing the temperature to rise (decrease rate drying region). The rate of temperature rise in the preheating area is proportional to the amount of moisture contained in the clothing; if the amount of moisture is low, the temperature increases rapidly, and if the amount is high, the temperature rises slowly by 1 J. Therefore, the time Δt1 at which the constant increase value ΔT1 is reached from the start of operation until the constant rate drying region is reached is checked, and the end time 1. =α×ΔJ1 is preliminarily calculated and displayed on the control display S 9. The actual drying state is detected by checking the time Δt2 at which the constant increase value ΔT2 is reached in the decreasing rate drying region, determining the end time t2=β×Δt2, and stopping the clothes dryer at a predetermined time. Naturally, predicting the end time using Δt2 is more accurate than predicting the end time using Δ1 and Δt2, and the dry state is detected using Δt2. However, since the required time that the user wants to know is just a rough estimate, the above-mentioned Δt
Even if the end time is predicted by 1, it is sufficient for practical use.

Effects of the Invention As described above, according to the present invention, by predicting and displaying the end time based on temperature changes in the preheating area, the end time can be known at an early point, making it easier to plan housework. We can provide a very convenient clothes dryer.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view of a clothes dryer, and FIG. 2 is a characteristic diagram showing the relationship between exhaust temperature and drying time.

Claims (1)

[Claims] 1. A drum that accommodates and rotates clothes, a heat source for drying the clothes in this drum, a fan that guides and discharges the heat from the heat source into the drum, and detects the temperature of the exhaust gas discharged from the drum. A clothes dryer comprising a sensor and a time display device, and configured to display the required drying time on the time display device in proportion to the time from the start of operation until the exhaust temperature becomes constant in a constant rate drying region.