JPS59118198A - 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 dehumidifying type clothes dryer using a semiconductor heater for use in general households.

Conventional configuration and its problems Conventionally, in clothes dryers using a single semiconductor heater as described in 1), due to the characteristics of the semiconductor heater, the temperature of the air supplied to the dryer can be lowered to a lower temperature. It has the characteristic that the heater power increases when the time is high and decreases when the temperature is high.This characteristic works well in general duct-type clothes dryers, and when drying using a conventional nichrome heater. It has the advantage that the difference in drying time between low and high temperatures is smaller, and drying can be completed in a relatively short time even at low temperatures.However, in so-called dehumidifying clothes dryers, As shown in Figure 1, the drying air is circulated inside the machine, and is cooled by the outside air in the heat exchanger 1 and condenses moisture, so the heater 2
The 2'lii degrees of air supplied to the heater becomes relatively high during stable operation, and the input to the heater does not change significantly as in the case of a duct type heater. I can't wait.

In addition, in dehumidifying clothes dryers, the temperature of the circulating drying air is low at the start of operation, and the temperature does not reach a stable temperature until approximately 30 minutes have elapsed, so the heater power required is large at the beginning of operation, and low when stable. It has characteristics. However, conventional clothes dryers are rated at 15A, so the human power required for the heater is V'! , 12-13A
must be the maximum input, and if the heater power at the start of operation is not below this value, problems such as breaker tripping will occur. Therefore, as shown in Figure 2, which explains the transition of heater input values, the heater power at the start of operation is set to 13A or less, and when stable operation is approximately 10A.
Generally, it is input as A. In addition, the heater manual flow is as shown in curve 3.

As mentioned above, in a dehumidifying clothes dryer using a semiconductor heater, the temperature is approximately 1 ooo'w4z degrees (1ooV) during the most efficient and stable operation.

This means that only a low input of 10A) is required, resulting in extremely inefficient drying operation, which is a major problem when using highly safe semiconductor heaters in dehumidifying clothes dryers. ing.

OBJECTS OF THE INVENTION It is an object of the present invention to solve these conventional problems and to improve the performance of a dehumidifying type clothes dryer using a semiconductor heater.

Structure of the Invention The present invention includes a current detector that detects the current flowing to a semiconductor heater, a damper for adjusting the circulating air M provided in a part of the circulating air path, and a damper that opens and closes in accordance with the output of the current detector. The controller controls the air supply to the semiconductor heater by opening and closing the damper according to instructions from the controller, and is capable of handling input changes due to changes in the amount of air supplied, which is another characteristic of semiconductor heaters. By applying this method, it is attempted to control the input of a semiconductor heater to a predetermined value.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 3, 4 is a motor, 5 is a clothing storage that is driven by a belt (not shown) by the motor 4, and 6 is a clothes storage cabinet with a built-in semiconductor heater 2, which heats the air dehumidified by the heat exchanger 1. This heater cover forms a wind tunnel leading to the clothes storage 5. γ is a circulation fan driven by the motor 4 like the clothes storage 5; 8 is a fan case containing the circulation fan 7; 9 is a circulation fan that guides the circulating air sent out by the ring fan 7 to the heat exchanger 1; It is a wind fuselage. The clothing storage 5, the circulating air cylinder 9, the heat exchanger 1, and the heater cover 6 constitute a circulating air path. Reference numeral 1o denotes a damper provided in the circulating wind cylinder 9, and its opening and closing are controlled by the controller 12 in accordance with the output of the current detector 11 that detects the input terminal value to the semiconductor heater 2. Note that the outer surface of the heat exchanger 1 is located in the cooling air path that cools the circulating air, and the heat exchanger 1 exchanges heat between the circulating and cooling air.

When the power is turned on at step f41, the motor 4 and the semiconductor heater 2 are energized according to instructions from the controller 12, and the clothes dryer starts operating. motor 4
When the operation is said to be carried out, the fJ fan 7 rotates, and the air that has evaporated the moisture from the clothes in the clothes storage 5 is sent to the heat exchanger 1 through the circulation air cylinder 9. Here, outside air is cooled and dehumidified by a cooling fan (not shown) also driven by the motor 4, and the heater cover 6 is cooled and dehumidified.
The clothes are heated again by the semiconductor heater 2 inside and sent into the clothes storage 5. At this time, the input current value of the semiconductor heater 2 is detected by the current detector 11, and the opening/closing degree of the damper 10 is controlled by the controller 12 so as to maintain this value at a constant value. That is, when the input current value is large, the damper 10 is closed to limit the human power of the semiconductor heater 2, and when the human power current value is small, the damper 10 is opened to increase the heater power, thereby applying feedback control III. Therefore, the input terminal value of the semiconductor heater 2 is the dashed-dotted curve 1 shown in FIG.
A room like 3? Regardless of r'AK, it is possible to always apply the maximum necessary human power to the heater or use 0Tf, which greatly reduces the time required for drying.

Effects of the Invention As is clear from the above examples, the table dryer of the present invention,
Pigeon: The damper is opened/closed by the controller according to the output of the current detector that detects the input current of the semiconductor heater, so the input current of the semiconductor heater ensures constant human power for the heater, regardless of the room temperature. In addition, in terms of configuration, current detection can be processed within the controller, making it possible to make it compact, and it is possible to significantly shorten the drying time, which was a problem in the past.1 , it is possible to provide an extremely efficient dryer.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the configuration of a conventional dehumidifying dryer;
The figure shows the characteristics of the heater input terminal of a dehumidifying dryer using a semiconductor heater. FIG. 3 is a sectional view of a dehumidifying dryer according to an embodiment of the present invention. 1...Heat exchanger, 2...Semiconductor heater, 5...Clothing storage +4'N 10...
Damper, 11...Current detector, 12...
·controller. Names of Lee & Udai Patent attorney Toshio Nakao and one other person

Claims (1)

[Claims] a circulating air path that connects the semiconductor heater and the clothing storage side; a cooling air path that cools the circulating air in the circulating air path; a heat exchanger that exchanges heat between the circulating and cooling air; A damper for regulating circulating air provided in a part of the air path, a current detector for detecting the current flowing to the semiconductor heater, and a controller for opening and closing the damper according to the output of the current detector are provided. A clothes dryer.