JPH01115332A - Dish washer - Google Patents

Abstract

PURPOSE: To change the temp. of washing water corresponding to the change of power supply frequency, to improve the rising of heating while reducing washing irregularity even at any place and to eliminate the extension of an operation time by providing a heating designating part designating the heating power of a heater on the basis of discrimination frequency and a temp. altering and setting part altering and setting predetermined temp. on the basis of the discrimination frequency. CONSTITUTION: A temp. altering and setting part 34 constituted of a microcomputer 25 looks a frequency flag and sets predeteremined temp. to 65 deg.C when the flag is erected and sets the predetermined temp. to 60 deg.C if the flag is not erected. At the same time, a heating designating part 35 constituted of the microcomputer 25 designates heating so that the heating power by a heater 7 becomes total output if the flag is erected and also designates heating so that the heater 7 becomes slightly low output by ON-OFF control of zero cross or phase control if the flag is not erected. By changing the heating temp. of washing water to the change of power supply frequency, even if a jet amt. of water by a washing pump is changed, a change of a water amt. is adjusted by a temp. change to obtain an almost equal washing ratio.

Description

Detailed Description of the Invention [B] Industrial Application Field The present invention uses a washing pump driven by an AC motor to cocoon washing water heated by a heater in a washing tank. This invention relates to a dishwasher that cleans dishes by rotating and spraying water.

(b) Prior Art This type of dishwasher obtains a desired cleaning efficiency by heating and spraying washing water. This injection amount depends on the ability of the AC motor that drives the cleaning pump, but when the power frequency changes to 50 Hz or 60 Hz, the motor's capacity increases to tK. For example, 60Hz
If a 50 Hz cD4 source is supplied to a motor like -, the amount of water jetted will decrease and the cleaning rate will also decrease.

Although it is a washing machine that can obtain a desired cleaning rate in response to such changes in power frequency, Japanese Patent Laid-Open No. 61-1
No. 25389 VC discloses f'Lfc. In this method, the reversal period t'' of the rotor blade is changed in response to a change in the source frequency, and as a result, water scattering, cloth staining, and cleaning* are approximately the same.

Q~ Problems that the invention aims to solve6. Then, like a washing machine, pump 12 is operated intermittently and "C" is used only in places where the cleaning rate is low.
M cannot be achieved, and it is not possible to achieve equalization with a high cleaning rate.

Therefore, the invention focused on the water temperature, which is the other factor involved in the cleaning rate, and changed the temperature of the cleaning water by 1r with respect to the change in the source frequency in 7. This makes the cleaning rate the same despite frequency changes and prevents the operating time from increasing.

B) Means for Solving the Problems The solving means according to the present invention includes a heating control unit that controls heating of cleaning water by a heater based on a set predetermined temperature;
A frequency discrimination section that discriminates the frequency of a power supply; a heating specification section that specifies the heating power of the heater based on the discrimination frequency; and a temperature change setting section that changes and sets the predetermined temperature based on the discrimination frequency. It has a well-developed structure.

(e) When the action station skill number discrimination capital discriminates 60Hz2, the temperature change setting section sets, for example, 60°C as a predetermined temperature, and the heating specification section sets 7J11. @Specify a normal force. Also, if the frequency is determined to be 50Hz, the temperature change setting section will be set to 60Hz.
℃: For example, 65℃ is set, and the heating designated part has a stronger heating power. specify. Calorie heat control unit is
Continuous heating by a heater is performed centrally until the cleaning water reaches a predetermined temperature, and once the predetermined temperature is reached, Calorie heat control, such as ON-OFF control, is performed to maintain this temperature. A large-capacity heater is prepared, and the usual 711I heating power can be omitted for each hour of current (voltage) applied to this heater, or by controlling the phase. Strong heating power is generated by direct current (voltage) t to the heater.
``Obtained by offering.

Therefore, in the case of 60Hz and 5oHz, the predetermined temperature is set at 60℃ for one and 65℃ for the other, so even if the relationship of the sprayed wax is reversed, the overall cleaning rate will be the same as between roads. . Since the q-curves until heating to 65°C use strong heating power, the time is almost the same as that at 60°C. For this reason, if the operation is terminated within a certain period of time after reaching the predetermined temperature,
In both cases, there is almost no difference in the total operating time, and the cleaning rate becomes equal, for example, at 10,096.

(To) To explain based on the example below, Figure 2 shows the main body of the tUa tabletop S:S Torako machine, which has a one-turn door [21'! 1) A cleaning tank (3
) has been established. In the middle of the room (3) is a L-shaped sea urchin that can be put in and taken out from the U-side curved opening.

(57 is the rail for direct use of a.

Washing 4 (3) At the bottom of I7'3, an arm nozzle (6) that rotates and sprays washing water onto the tableware (41) and a large-capacity sheathed heater (7) are installed. The removable filter (8) is installed in the ninth place (9).'ilJ is a water tank compensation means (31 yen), and the upper and lower blades of the float are used to wash 4 times. This purification water level switch (111) detects water leakage, and the abnormally high water level switch (tα4) detects water leakage.
On the outer bottom of the front side, there is a nermistor U4 that outputs a water temperature of 11 yen, and there is also a door switch that detects the closing of the upper door (2).

(151 is the water supply pipe to the water tank (18 m wash + 1 (3), C7) is the water supply pipe to the concave FR [(9) and the drain pump α& is the diameter ratio drainage pipe, C9 is from the concave fr (9) Arm nozzle (
6) is a cleaning bonder that supplies, injects and circulates cleaning water; QU is a blower that circulates drying air within the tank; and the cleaning pump (1!J is driven by an AC motor 1211 such as an induction motor). Sanru.

At the bottom of the front of the main body (13) there is a control box with an operation f1: surface, and on that operation surface there is a start key (c) that also serves as a pause key, and a power switch fC2-II.
is the provision.

The control box contains ROM, RAM, CPU,
1) A control circuit centered on a microcomputer (hereinafter referred to as microcomputer) consisting of 0, etc. is incorporated, and the circuit diagram thereof is shown in FIG. Uυchi, the microcomputer (c) sets the cleaning water level switch f (Ill, abnormal water level switch f'J'J
snar mista u1 door in:P (141, start key No. 16 manually, sheathed heater (7), water supply valve 1e1 drain pump bet, cleaning pump 411 (AC motor D), blower 4 f'lli In addition, the microcomputer j can output an output to the AC solenoid 4 and the power switch Qη, which automatically releases Do at a certain time after the operation ends when the power switch is closed.

To explain the control operation by the microcomputer based on the flowchart in Figure 743, first, the 11c source switch fc2
After 4J'rONL, the initial setting is to clear RAM @ completely, call up the course and hour 1m from the ROM, and set it. Then, check the detected temperature of Teamister IJ31, and at that time, the abnormal temperature control part diagram generated by microcomputer 6 as r4 is 80℃.
When the above is detected, the power switch (2) is turned off by the AC solenoid □□□.

At the same time, the frequency discrimination section 3 which is configured by the microcomputer □□□
v determines the frequency of the supply source, sets a frequency flag when it is 50Hz, and turns off this flag when it is 60Hz. This discriminator 3υ may be a means (circuit) externally attached to the microcomputer.

When the course and Q interval are set and the start key is operated, each process of washing, chopping, and drying is controlled by a microcomputer 4 according to the course and time.
I'm going to go to K and hit the fire n. The washing process during the course is explained in the flowchart of FIG.

Here, the numerical value indicating the content of washing @ 1' Full investigation Next, IIf! Water is supplied by a water supply control section consisting of a microcomputer.

After this, the temperature change setting part diagram, which is made by the microcomputer, looks at the frequency flag and sets the predetermined temperature g65℃.
If not, set the predetermined temperature to 60°C. At the same time, the heating designation section (c), which is composed of a microcomputer,
If the tag is set, the heating power of the heater (7) becomes full output (strong), and if the flag is not set, the heater (power tX cross 0N-OFF control, phase control, etc.) outputs a little The heating control 5 (361) composed of a microcomputer is responsible for controlling the heating by the heater (7) as specified.

The m-degree detection section consisting of four microcomputers checks the water temperature and sets a temperature check flag, and if the water temperature is already above a predetermined temperature, sets a time reduction flag.

The washing process control unit 321 first drives the washing bonder ll' by the AC motor 1211, and if the water temperature is not above a predetermined temperature ■, the heating control Xj15 (to) turns on the heater (power L sword aps, tp line,
If it is 0 or more, the heater (7) is turned off. The temperature attainment flag is set when the water temperature reaches a predetermined temperature σ even once.

The minimum cleaning time for one bed is 12 minutes, and when 12 minutes have passed, the 12-minute elapsed flag is set. If the water temperature has been above the specified temperature ■ from the beginning, the cleaning pump a1 and heater (7
) is turned OFF.

Normally, more than 12 minutes have passed, the water temperature has reached the specified temperature (1), and from this point on, the water temperature will continue to rise for 1 minute.
Cleaning bong σyu and heater (
7) is turned off.

During this washing process, the temperature of the washing water rises quickly and reaches 65°C due to heating at full power (high) when the frequency is 50Hz, but the time it takes to reach 65°C is slower than when the temperature is 608Z. ) The time it takes to reach 60°C with the heating power is the same as the one below.The cleaning rate is relatively low at 50 Hz and has a high temperature, and at 60 Hz is a high water jet and low temperature.
On the road etc. (100*).

After the washing process is completed, the clove-picking process (same as course 2) is carried out, and the dried roots are flinted.

At the end of the course, a completion notification will be made by budai.

In addition, when using wood, adjust the heating power of the heater (7) to 0N-
I tried using OFF control or phase control, but it also doesn't work if I simply switch multiple heaters.

(g) Effects of the invention In order to avoid the effects of the invention, the temperature of the cleaning water can be changed in response to changes in the four-source frequency. It is possible to obtain a substantially uniform cleaning rate by adjusting the temperature and temperature, and also to quickly respond to the predetermined temperature of the rise
It is possible to prevent the distance between Rf from becoming longer. Therefore, 1511 in any place: # Extremely Okawa dishwashing I that has less unevenness and does not prolong operation time! This is something that P Engineer can provide.

[Brief explanation of the drawing]

FIG. 1 is a control block diagram of a dishwasher according to the present invention.
5! Figure c2 is the same part machine 4 figure, Figure 3 is a flowchart for explaining the main work as a whole, and Section 4 is a flowchart for explaining the recommendation f'F-'d of the washing process. j...Microcomputer, +31)...Frequency discrimination section, (
(b)...Temperature change setting section, (iv)...Heating specification section 1, Seki...Heating control section.

Claims (1)

[Claims] (1) When cleaning dishes by circulating and spraying cleaning water heated by a heater in a cleaning tank by a cleaning pump driven by an AC motor, the heating of the cleaning water by the heater is set. a heating control unit that controls based on the determined predetermined temperature; a frequency determining unit that determines the frequency of the power supply; a heating specifying unit that designates the heating power of the heater based on the determined frequency; A dishwasher comprising: a temperature change setting unit that changes and sets the predetermined temperature.