JP2940262B2 - Dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher and dryer used in homes and industrial use.

[0002]

2. Description of the Related Art A conventional dishwasher performs washing, rinsing, and drying for a predetermined washing time, rinsing time, and drying time regardless of the amount of dishware.

[0003]

However, in the above method, since the washing, rinsing and drying are performed irrespective of the amount of tableware, the execution time of each step may be too long or too short. In other words, there is a problem that waste power may be used due to the occurrence of unwashed portions or the drying time being too long.

[0004] The present invention is to solve the problem of such a conventional structure, and appropriately controls the washing time, the rinsing time, and the drying time according to the amount of stored tableware. The aim is to provide a dishwasher that can be.

[0005]

Means of the present invention for achieving the above object are a washing tank for washing dishes, water supply means for supplying washing water to the washing tank, and a washing nozzle for jetting washing water. Circulation means for supplying cleaning water to the cleaning nozzle, drainage means for draining the cleaning water, heating means for heating the cleaning water, a water temperature sensor for detecting a temperature of the cleaning water, and detecting an outside air temperature Outside air temperature sensor and power supply voltage detection
Voltage detecting means, and time measuring means for measuring time,
The time information measured by the timer means and the water temperature detection means
Water temperature information, the outside air temperature information detected by the outside air temperature sensor,
Processing for processing the information of the power supply voltage detected by the voltage detecting means;
And a fuzzy inference unit, wherein the fuzzy inference unit obtains an initial water temperature, an outside air temperature, and a power supply obtained from the processing unit.
The dishwasher / dryer determines the washing time, the rinsing time, and the drying time by using the pressure and the degree of increase in the water temperature as inputs.

[0006]

[0007]

[0008]

[0009]

The operation of the present invention operates as follows. That is,
Fuzzy inference of the amount of dishes using four parameters of initial water temperature, outside air temperature, power supply voltage and temperature change of washing water, and determining washing time, rinsing time and drying time, so that appropriate washing, rinsing and drying can be performed. You can do it.

[0010]

[0011]

[0012]

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes a main body of a dishwasher, which includes the following units. Reference numeral 2 denotes a washing tank for washing dishes, and a dish basket 3 for storing the dishes is provided. Reference numeral 4 denotes a water supply unit for supplying cleaning water to the cleaning tank 2.
Reference numeral 5 denotes a blower that blows indoor air to the cleaning tank 2. The air blown from the blower 5 and the cleaning water supplied from the water supply unit 4 are heated by the heating device 6 and cleaned. It is supplied to the tank 2. Reference numeral 7 denotes a circulating means including a pump for circulating the washing water, and reference numeral 8 denotes a washing nozzle for ejecting the washing water to wash the tableware stored in the tableware basket 3. Reference numeral 9 denotes a drainage unit including a pump for draining the washing water from the washing tank 2. 10 is a water temperature sensor for detecting the temperature of the washing water, and 11 is an outside air temperature sensor for detecting the outside air temperature.

Reference numeral 17 denotes a control device for controlling each of the above-mentioned devices. In this embodiment, a microcomputer is used. The control device 17 has the following components.
Reference numeral 12 denotes a processing unit, which includes time information measured by the timer 13;
Water temperature information of the water temperature sensor 10, outside temperature information detected by the outside temperature sensor 11, and voltage detecting means 1 for detecting a power supply voltage.
5 is processed to obtain the fuzzy inference unit 14.
To send fuzzy inference information to That is, in this embodiment, four parameters of the initial water temperature, the water temperature increase, the outside air temperature, and the power supply voltage are used as the fuzzy inference information. Reference numeral 16 denotes a control unit which controls the water supply means 4, the heating device 6, the circulation means 7, and the drainage means 7 based on information on the amount of tableware estimated by the fuzzy inference unit 14 acting.

Hereinafter, the operation of the present embodiment will be described focusing on the operation of the fuzzy inference unit 14. The processing unit 12 firstly calculates the initial water temperature of the washing water and the degree of increase in the water temperature after a lapse of a certain time from the time information of the time means 13 and the temperature information of the water temperature sensor 10 as shown in FIG. . T0 is the initial water temperature at time dt0 measured by the timer means 13, and T1 is the time dt1 from the moment when the water temperature information of the water temperature sensor 10 indicates the initial water temperature T0.
At a predetermined water temperature reached after the lapse of time, in this embodiment, this time
dt1 is treated as a water temperature increase and is output to the fuzzy inference unit 14. In other words, since the washing water is heated together with the washing of the dishes, if the amount of dishes stored in the tableware basket 3 is large, the degree of increase in water temperature dt1 is long, and if the amount is small, the degree of increase in water temperature dt1 is short. Second, since the outside air temperature T2 and the power supply voltage V affect the water temperature rise dt1, the processing unit 12 outputs the outside air temperature from the outside air temperature sensor 11 and the outside air temperature
Processes information on T2 and power supply voltage V. That is, the water temperature rises
The degree dT1 becomes shorter when the outside temperature is high, and becomes longer when the outside temperature is low.
Or the heating power of the heating device 6 depending on the power supply voltage.
The water temperature rise dT1 is short if the power supply voltage is high.
Water temperature rises, such as
Through the processing unit 12 to consider the variable element of the degree dT1
Output the values of the outside air temperature T2 and the power supply voltage V to the fuzzy inference unit 14
doing. The fuzzy inference unit 14 calculates the initial water temperature T0 and the outside air temperature.
The cleaning time t1, the rinsing time t2, and the drying time t3 are determined from T2, the power supply voltage V, and the water temperature rise dt1. The control unit 16 controls the cleaning time t1, the rinsing time t2 obtained from the fuzzy inference unit 14,
The heating device 6 and the circulation means 7 are controlled according to the drying time t3.

Next, a method of fuzzy inference in the present embodiment will be described below. The initial water temperature T0 and outside temperature T2
Power supply voltage V and water temperature rise dt1 and proper cleaning time t1
It is difficult to formulate the relationship between the rinsing time t2 and the drying time t3. Therefore, a method of expressing this complicated relationship by fuzzy inference will be described below for the case where the cleaning time t1 is determined.

Fuzzy inference states that "the initial water temperature T0 is high, the outside temperature T2 is high, the power supply voltage V is high, and the water temperature rise dt1 is high.
If the cleaning time is long, the cleaning time t1 is made very long. Is performed based on such a rule. As shown in FIG. 3, 24 such rules are used. The initial water temperature T0 in these rules is "high", the outside temperature T2 is "high",
Qualitative and ambiguous concepts such as the power supply voltage V being “high”, the water temperature rise dt1 being “long”, and the cleaning time t1 being “very long” are shown in FIGS. 4 (a), (b), (c) It is quantitatively expressed by the membership functions shown in 5 (a) and (b).

Here, the reasoning operation of the fuzzy reasoning will be briefly described. As described above, the length of the water temperature increase dt1 has a correlation with the amount of tableware. However, since the detection section of the water temperature rise dt1 is from the initial water temperature T0 to the predetermined temperature T1, the level of the initial water temperature T0 affects the water temperature rise dt1. That is, even with the same water temperature increase dt1, it is necessary to interpret that if the initial water temperature T0 is low, the amount of dishes is small, and if the initial water temperature T0 is high, the amount of dishes is large. Since the outside air temperature T2 and the power supply voltage V also affect the water temperature rise dt1, the fuzzy inference in this embodiment treats these inputs as correction factors when interpreting the water temperature rise dt1.

By using the fuzzy inference as described above, a plurality of pieces of input information can be determined and the operation amount can be determined, so that finer control can be performed. Here, the fuzzy inference for determining the cleaning time t1 has been described, but the fuzzy inference for determining the rinsing time t2 and the drying time t3 is also realized in a similar manner. In the present embodiment, a normal MIN-MAX centroid method is used as a fuzzy inference method, but the present invention is not limited thereto. Here, in the present embodiment, a heater is used for the heating device 6, and a thermistor is used for the water temperature sensor 10 and the outside air temperature sensor 11, but the present invention is not limited to this. Further, the processing unit 12, the timing unit 13, the fuzzy inference unit 14, and the control unit 16 are constituted by the microcomputer 17, but there is no problem by other means.

[0020]

The means of the present invention mainly includes time information,
Temperature information, outside temperature information, and power supply voltage information are stored as inputs.
Equipped with a fuzzy inference unit for estimating the
It is configured to determine time, rinsing time, drying time
Dishwashing can be performed with fine-grained control
It can be a dryer.

[0021]

[0022]

[0023]

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a dishwasher showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating input variables of the fuzzy inference.

FIG. 3 is an explanatory diagram showing a rule table of the fuzzy inference.

FIG. 4 is an explanatory diagram showing a membership function of the fuzzy inference.

FIG. 5 is an explanatory diagram showing a membership function of the fuzzy inference.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Cleaning tank 4 Water supply means 7 Circulation means 8 Cleaning nozzle 9 Drainage means 10 Water temperature sensor 11 Outside air temperature sensor 12 Processing part 13 Time keeping means 14 Fuzzy inference part 15 Voltage detection means 16 Control part

Continued on the front page (72) Inventor Masafumi Sadahira 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. ) Inventor Takayuki Ishihara 1006 Kazuma Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References Hikaru 1-138364 (JP, U) Field surveyed (Int.Cl. ⁶ , DB name) A47L 15/46

Claims (1)

(57) [Claims] 1. A washing tank for washing dishes, a water supply means for supplying washing water to the washing tank, a washing nozzle for jetting washing water, a circulation means for supplying washing water to the washing nozzle, and a washing water Drainage means for draining water, heating means for heating the washing water, a water temperature sensor for detecting the temperature of the washing water,
Outside temperature sensor that detects outside temperature and power supply voltage
Voltage detecting means, time measuring means for measuring time, and the time measuring means
The time information measured by the means and the water detected by the water temperature detection means
Temperature information, outside temperature information detected by outside temperature sensor, and voltage
A processing unit that processes information on the power supply voltage detected by the detection unit;
When, and a fuzzy inference unit, the fuzzy inference section before
The initial water temperature, outside air temperature, power supply voltage,
Dishwasher / dryer that determines washing time, rinsing time, and drying time using the temperature and the degree of rise in water temperature as inputs.