JPH0591968A - Dishwasher - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a dishwasher that can surely dry in a short time by variably controlling the amount of heat of a heater. The controller 3 controls the output variable means 4 to change the heat quantity of the heater 1 with respect to time by the output from the timer 2 which measures the time, and the heat quantity stored on the surface of the material to be dried is internally controlled. To penetrate into. Therefore, the temperature difference between the surface and the inside of the object to be dried can be made smaller than that during steady heating, and the material to be dried can be dried in a short time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher used in general households.

[0002]

2. Description of the Related Art Conventionally, drying has been performed with a constant output of a heater for raising the temperature in the refrigerator.

[0003]

In such a conventional dishwasher, since the heater output is constant, the temperature of the material to be dried rises, but the internal temperature does not rise, so that the surface and the interior of the dishwasher do not rise. There is a problem that the temperature difference is large and the internal temperature of the material to be dried cannot be increased, and thus the drying time of the material to be dried becomes long.

The present invention solves the above problems, and an object of the present invention is to provide a dishwasher capable of shortening the drying time of the material to be dried.

[0005]

In order to achieve the above-mentioned object, a dishwasher of the present invention comprises a heater for raising the temperature inside the refrigerator, a timer for measuring time, and an output for varying the output of the heater. It has a variable means and a controller for inputting the output of the timer and outputting it to the output varying means to change the heat quantity of the heater with respect to time. The amount of heat of the heater is changed so as to penetrate into.

[0006]

According to the present invention, the amount of heat of the heater is varied with respect to time so that the amount of heat stored on the surface of the object to be dried permeates into the inside of the object. Heat can be applied to the inside, and drying can be performed in a short time.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit block diagram of a dishwasher according to an embodiment of the present invention, and FIG. 2 is an output diagram to a heater of the dishwasher. As shown in FIG. 1, the dishwasher is provided with a heater 1, which raises the temperature of air or water in the refrigerator. Further, in the dishwasher, a timer 2 for measuring time, a controller 3 for inputting an output from the timer 2 and varying the heater output according to the heater voltage pattern shown in FIG. 2, and an output from the controller 3 to the heater 1. The output variable means 4 is provided for changing the output of.

Next, this operation will be described with reference to FIGS. 1 and 2. Here, in order to simplify the explanation, it is assumed that a numerical value is set, the temperature in the chamber for drying the material to be dried in the drying step is 50 ° C., and the voltage applied to the heater 1 is 50 V in order to reach this 50 ° C. And Further, the heater output variable of the controller 3 is set to the output pattern of 1 / f fluctuation shown in FIG.
The standard switching time of the output varying means 4 is set to 50 seconds.

When the drying is started, the controller 3 sends a timing signal to the timer 2, and the timer 2 which has received the timing signal starts the timing, and at the same time sends a signal as shown in FIG. Further, the controller 3 always inputs the timer 2, and keeps outputting the same output to the output varying means 4 during the time set in each period a to e. For example, output varying means 4
Applies a voltage of 55 V to the heater 1 for 45 seconds during the period a. That is, the voltage 55V is higher than the applied voltage 50V corresponding to the reference temperature 50 ° C., and the time 45 seconds at this time is shorter than the standard switching time 50 seconds. Then timer 2
When the timer has finished measuring 45 seconds, the controller 3 outputs a reset signal to the timer 2 and outputs a clock signal again. At the same time, the output varying means 4 is output for the next period b. During this period b, the output varying means 4 applies a voltage of 45V to the heater 1. Then, when the timer 2 clocks 55 seconds of the period b, the reset signal is sent to the timer 2 and then the clock signal is sent to make the pattern of the next period c similar to the previous time. At the same time, the output varying means 4 outputs for the period c, and the output varying means 4 outputs 50 V to the heater 1 for 50 seconds. The above repeating operation is sequentially performed.

As described above, when the voltage applied to the heater 1 is variably controlled with respect to time, since the voltage is high during the period a in FIG. 2, the surface temperature of the material to be dried rises. In the next period b, the voltage applied to the heater 1 becomes low, so the surface temperature of the object to be dried decreases, but in this period b, the amount of heat stored on the surface of the object to be dried in the period a permeates into the inside. It has the effect of going. When the fluctuation is performed by the 1 / f control, the temperature difference between the surface and the inside of the material to be dried after a predetermined time becomes smaller than that during steady heating. Therefore, it can be completely dried in a short time. In this embodiment, the output of the heater is made variable by controlling 1 / f fluctuation, but the heater may be changed so that the amount of heat stored on the surface of the material to be dried permeates into the inside.

[0011]

As described above, according to the present invention, since the internal temperature of the material to be dried can be efficiently raised, it is possible to provide a dishwasher having a short drying time.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of a dishwasher according to an embodiment of the present invention.

FIG. 2 is an output diagram to a heater of the dishwasher.

[Explanation of Codes] 1 heater 2 timer 3 controller 4 output varying means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroko Ogiwara 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A heater for raising the temperature inside the refrigerator, a timer for measuring time, an output varying means for varying the output of the heater, and an output of the timer for input to the output varying means. A dishwasher having a controller for changing the amount of heat of the heater with respect to time, and the controller is configured to change the amount of heat of the heater so that the amount of heat of the surface of the material to be dried penetrates into the inside.