JPH06343799A - Clothes dryer - Google Patents

Abstract

(57) [Summary] [Purpose] I would like to obtain a clothes dryer that does not cause insufficient drying or uneven drying when a large number of towels are put. [Composition] After the start of drying, the combustion amount control device 4 is temporarily squeezed, and the exhaust temperature at this time is detected by an exhaust temperature detection sensor 7. If this value is lower than a certain level, a towel drying determination device It is judged that a large amount of towels are contained in 12 and the operation time of the dryer is controlled to be a little longer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is applied to a clothes dryer.

[0002]

2. Description of the Related Art A conventional clothes dryer is shown in FIG. In this figure, 1 is a drum, 2 is a filter, 3 is a gas burner, 4 is a combustion amount control device attached to a gas line 5, 6 is a drying sensor attached inside the drum 1, and 7 is a drying sensor.
Is an exhaust temperature detection sensor attached to the exhaust port 8, 9
Is a clothes discrimination device, and 10 is a dryer control device. In the case of this conventional clothes dryer, the dryness of the clothes is detected by the dryness sensor 6, and the operation is stopped when the dryness reaches a constant value. This is the configuration.

Further, in the conventional clothes dryer, it is determined whether the type of clothes put in the drum 1 is cotton or synthetic fiber, for example, by the rate of increase in exhaust temperature detected by the exhaust temperature detection sensor 7. Therefore, control is performed to lengthen or shorten the drying time. FIG. 5 shows this determination criterion. The change width Δt of the exhaust gas temperature during a constant time T is detected after the start of operation and before the drying progresses to a certain level. Judged to be cotton or clothing containing a lot of cotton.

[0004]

However, the method of judging clothes in the clothes dryer has the following drawbacks.

A. When only the towel is dried in a large amount, the correct degree of drying and the temperature of the clothes cannot be detected because the positions of the clothes are difficult to switch and the clothes are difficult to dry.

B. When only a large amount of towel is dried, unevenness in drying occurs if the end of drying is determined in the same manner as normal clothing during drying.

C. The driving pattern cannot be changed between towel drying and clothes containing a lot of cotton.

An object of the present invention is to eliminate the drawbacks described in ac in the judgment of clothes in a clothes dryer.

[0009]

The construction of the clothes dryer according to the present invention is as follows.

A clothes temperature detection sensor is installed in the drum, an exhaust temperature detection sensor is installed in the exhaust port of the drum, and a combustion amount control device for controlling the combustion amount of the gas burner is installed in the gas line. When a constant temperature is detected, the combustion amount control device is temporarily controlled to reduce the combustion amount, and the exhaust temperature when the combustion amount is reduced is detected by an exhaust temperature detection sensor, When there is a certain level of decrease, it is judged that a large amount of heavy cotton is in the drum,
A clothes dryer which is provided with a towel drying determination device that controls a drying end timing based on a signal from a clothes temperature detection sensor in a delayed direction.

[0011]

When the operation switch is turned on, the gas burner is ignited and this warm air is sent into the drum from the warm air outlet. The temperature inside the drum is constantly detected by the clothes temperature detection sensor, and the dryer control device temporarily detects that the temperature detected by the clothes temperature detection sensor has risen to a temperature determined as a detection temperature in advance. Control the combustion amount control device to reduce the amount of gas combustion, and detect the width of decrease in exhaust temperature when this amount is reduced. If this width (level) is above a certain value, a large amount of thick towels etc. The combustion amount control device is controlled so that it is determined that it is contained and that the drying amount is longer than usual. Immediately after the above determination, the normal drying operation is resumed.

In the above, the clothing temperature detecting sensor detects the clothing temperature in the drum to perform the determination control for the clothing detection. However, the dryness (humidity) detected by the drying sensor mounted in the drum The determination control may be performed according to.

[0013]

EXAMPLE FIG. 1 shows an example of the present invention. In this figure, 1 is a drum, 2 is a filter, 3 is a gas burner, 4
Is a combustion control device installed in the gas line 5, 6 is a drying sensor installed in the drum 1, 7 is an exhaust temperature detection sensor installed in the exhaust port 8, 10 is a dryer control device, 11 is clothing temperature The detection sensor 12 is a towel dryness determination device, and this towel dryness determination device 12 has the following functions.

As shown in FIG. 2, when, for example, only a towel is put into the drum 1 and the operation switch is turned on to start drying, the exhaust temperature gradually rises. Initially, the rate of increase is almost the same for both towels and ordinary clothes. Eventually, the combustion amount control device 4 is once narrowed down after the gradual increase. In this way, the exhaust amount decreases and the temperature decreases at the same time, but the temperature decrease level is large in the case of a towel containing a large amount of water, whereas the decrease level of ordinary clothes is small. A towel can be determined based on the level of decrease. When it is determined to be a towel, the operation end timing of the dryer, which is performed based on the operation time, that is, the signal from the drying sensor 6 or the clothes temperature detecting sensor 11, is delayed. FIG. 3 is the above determination flow.

In addition, like a towel or a bathrobe,
It is possible to easily determine the criteria for determining whether the article has high water absorbency and is easily entangled in the drum 1 or is normal clothing by experiment. In addition, not only towels but also more towels than normal clothes may be mixed. Therefore, in the case of the embodiment, the criterion has a certain width.

[0016]

The effects of the present invention are as follows.

A. When only the towel is dried, the drying end timing is too early, and there is no problem of insufficient drying or uneven drying.

B. When towels and normal clothes are mixed, the drying pattern is decided based on this mixing ratio.
By selecting this, it is possible to perform drying under optimum conditions even when a large number of towels are mixed.

[Brief description of drawings]

FIG. 1 is an explanatory view of a clothes dryer according to the present invention.

FIG. 2 is an explanatory diagram of a comparative example of the extent of decrease in exhaust temperature between the case of towels and the case of normal clothes when the combustion amount is temporarily reduced.

FIG. 3 is an explanatory diagram of a determination flow.

FIG. 4 is an explanatory view of a conventional clothes dryer and this control device.

FIG. 5 is an explanatory view of a conventional clothing determination standard.

[Explanation of symbols]

 1 Drum 2 Filter 3 Gas burner 4 Combustion amount control device 5 Gas line 6 Drying sensor 7 Exhaust temperature detection sensor 8 Exhaust port 10 Dryer control device 11 Clothes temperature detection sensor 12 Towel dryness judgment device

Claims (2)

[Claims] 1. A clothes temperature detecting sensor is installed in a drum, an exhaust temperature detecting sensor is installed in an exhaust port of the drum, and a combustion amount control device for controlling a combustion amount of a gas burner is installed in a gas line. When the detected temperature detects a constant detection temperature, the combustion amount control device is temporarily controlled to reduce the combustion amount, and the exhaust temperature when the combustion amount is reduced is detected by an exhaust temperature detection sensor, If this temperature drop is above a certain level, it is judged that a large amount of heavy cotton is in the drum,
A clothes dryer which is provided with a towel drying determination device that controls a drying end timing based on a signal from a clothes temperature detection sensor in a delayed direction. 2. A drying sensor is installed in the drum instead of the clothes temperature detecting sensor, and when a detection temperature at which the dryness detected by the drying sensor is constant is detected, the temporary combustion amount control device is controlled to burn. The clothes dryer according to claim 1, wherein the clothes dryer is configured to reduce the amount.