JPH0520286Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a dishwashing control device suitable for controlling washing and rinsing of dishes using hot water from a hot water supply source stored in a hot water storage tank.

(Prior Art) Conventionally, in this type of dishwashing control device,
A washing pump that pumps out washing hot water from a washing water tank that opens from below into a washing chamber that accommodates dishes according to the drive of a washing motor, and a washing pump that is disposed inside the washing chamber and pumps out washing hot water to wash the dishes. A cleaning nozzle that sprays hot water, a hot water storage tank that stores hot water supplied from a hot water supply source when a hot water supply valve is opened, and a rinse pump that pumps out hot water from the hot water storage tank in accordance with the drive of a rinsing motor. a rinsing nozzle for injecting hot water from a rinsing pump so that it flows down into the washing water tank as said washing water, and for injecting hot water from the rinsing pump as rinsing water for rinsing dishes after washing; a detector that detects when the hot water in the hot water storage tank increases to a predetermined amount and generates a detection signal, and causes the detection signal to disappear when the hot water in the hot water storage tank decreases from the predetermined amount; In response to the extinction, the hot water supply valve is opened, and in response to the generation of the detection signal, the hot water supply valve is closed, the cleaning motor is driven for a predetermined cleaning time, and then the rinse motor is controlled to be driven. There is something I did.

(Problem to be solved by the invention) By the way, in such a configuration, hot water cannot be supplied from the hot water source in time due to an increase in the frequency of cleaning or a decrease in the hot water supply capacity due to some cause of the hot water supply source, and the hot water in the hot water storage tank is The amount of hot water may temporarily be less than the predetermined amount at the end of washing the dishes. However, even in such a state, when the predetermined washing time has elapsed as described above, the dishes are always rinsed as described above by the pumping action of the rinse pump driven by the rinse motor. It is not possible to secure the appropriate amount of hot water from the hot water storage tank necessary for rinsing the dishes, resulting in problems such as insufficient rinsing of the dishes and the inability to sufficiently remove detergent adhering to the dishes.

Therefore, in order to deal with this problem, the present invention has a dishwashing control device that extends the washing time for dishes when the amount of hot water in the hot water storage tank is insufficient, and waits until the amount of hot water in the hot water storage tank is sufficient before rinsing the dishes. This is what we are trying to do.

(Means for solving the problem) In order to solve the above problem, in this invention,
As shown in FIG. 1, a washing pump 1b pumps out washing water from a washing water tank that opens from below into a washing chamber that accommodates dishes in accordance with the drive of a washing motor 1a; A washing nozzle that injects washing hot water from a washing pump 1b to wash the dishes, a hot water storage tank that stores hot water supplied from a hot water source when a hot water supply valve 3 is opened, and a motor 2a that rinses the hot water in this hot water storage tank. a rinsing pump 2b that pumps water according to the drive of the rinsing pump 2b, which is disposed in the washing chamber and injects hot water from the rinsing pump 2b so as to flow down into the washing water tank as the washing water; A rinsing nozzle that injects hot water from the rinsing pump 2b as rinsing water for rinsing; and a rinsing nozzle that is provided in the hot water storage tank to detect when the hot water in the hot water storage tank has increased to a predetermined amount and generate a detection signal; a detector 4 that causes a detection signal to disappear when the hot water in the hot water storage tank decreases from the predetermined amount; a hot water supply valve 3 that opens a hot water supply valve 3 in response to the disappearance of the detection signal and starts hot water supply in response to generation of the detection signal; A hot water supply valve control circuit 5 that controls the valve 3 to close, a cleaning motor control circuit 6 that controls the cleaning motor 1a to drive for a predetermined cleaning time, and a rinse motor after controlling the cleaning motor control circuit 6. The dishwashing control device equipped with the rinse motor control circuit 7 that controls the rinsing motor control circuit 2a is characterized by the following configuration.

That is, the structural feature of the present invention is as follows: When the detection signal disappears after the predetermined cleaning time has elapsed, the hot water supply valve control circuit 5 controls the hot water supply valve 3.
The control of the cleaning motor control circuit 6 is extended and continued under the opening control of the hot water supply valve control circuit 5, and this extended continuation control is terminated together with the closing control of the hot water supply valve 3 by the hot water supply valve control circuit 5 due to the generation of the detection signal. This is because the control circuit 8 is provided.

(Function) By configuring the present invention as described above, when the cleaning motor 1a is driven for the predetermined cleaning time under the control of the cleaning motor control circuit 6, the cleaning pump 1b is activated to pump the cleaning water in the cleaning hot water tank. The washing nozzle sprays the washing water toward the tableware to wash the tableware for the predetermined washing time.

However, if the detection signal from the detector disappears after the predetermined cleaning time has elapsed, the auxiliary control circuit 8 continues to extend the control of the cleaning motor control circuit 6, so that the cleaning motor 1a and the cleaning pump 1b
As the operation continues, the washing of the tableware by the washing nozzle is continued and extended even after the predetermined washing time has elapsed. In such a state, the hot water supply valve control circuit 5 controls the hot water supply valve 3 upon disappearance of the detection signal.
Since the hot water source is controlled to open, hot water from the hot water supply source is supplied into the hot water storage tank through the hot water supply valve 3.

After that, when a detection signal is generated from the detector 4, the auxiliary control circuit 8 terminates the extended continuous control of the cleaning motor control circuit 6 with the hot water supply valve 3 closed.
The rinse motor control circuit 7 controls the rinse motor 2a to be driven. Then, rinse pump 2
(b) draws hot water from the hot water storage tank and sprays it as rinsing water from the rinsing nozzle to rinse the tableware.

(Effect) As described above, if the detection signal from the detector 4 disappears due to a shortage of hot water in the hot water storage tank due to some reason when the predetermined cleaning time has elapsed, the hot water valve control circuit 5 The dishes are washed under extended continuous control of the washing motor control circuit 6 until a detection signal is generated from the detector 4 in response to the hot water being supplied from the hot water supply source to the hot water storage tank via the hot water supply valve 3 under control. The cleaning is continued as it is, and when the detection signal is generated, the washing is finished and the dishes are rinsed, so that the appropriate amount of rinsing water necessary for rinsing the dishes is always secured in the hot water storage tank, and then the dishes are washed. Rinsing will be performed. Therefore, the tableware can be constantly rinsed while reliably removing the detergent in the washing water that has adhered to the tableware.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIGS. 2 and 3 show the overall configuration of the dishwashing control device according to the present invention. This tableware washing control device has a washing chamber 10, in which a pair of upper and lower washing nozzles 11a, 1
1b and rinsing nozzles 12a, 12b are respectively arranged so as to face each tableware 14 placed on the rack 13. Further, the cleaning chamber 10 is provided with a cleaning hot water tank 20 that opens from below, and an overflow pipe 21 is provided upright within the cleaning hot water tank 20.

The cleaning pump 30 is driven by a cleaning motor 30a (see FIG. 3), and pumps out the cleaning hot water in the cleaning hot water tank 20 through a pipe _P1 and pumps it out to each cleaning nozzle 11a, _11b via a pipe P2. This means that each washing nozzle 11a, 11b sprays washing water from the pipe _P2 toward each tableware 14 to wash these tableware.

The rinse pump 40 is driven by a rinse motor 40a (see FIG. 3), and pumps hot water in the hot water storage tank 50 through a pipe _P3 and pumps it to each rinse nozzle 12a, 12b via a pipe _P4 . This means that each rinse nozzle 12a, _12b
This means that the hot water is caused to flow down into the washing water tank 20 together with a detergent from a detergent supply system (not shown) as washing water, or is sprayed toward each tableware 14 as rinsing water for rinsing each tableware 14. A hot water supply source 60 such as an instantaneous gas water heater supplies hot water into the hot water tank 50 through a pipe _P5 in response to opening of a hot water supply valve 60a consisting of an electromagnetic valve.

Next, the electric circuit configuration of the dishwashing control device will be explained with reference to FIG.
0 allows power to be supplied to the microcomputer 100 from the commercial power source by closing. The door switch 80 is
A closing signal is generated when the door of the cleaning chamber 10 is closed, and this closing signal is extinguished when the door is opened. As shown in FIG. 2, the hot water level detection switch 90 is provided in the hot water storage tank 50, and this hot water level detection switch 90 detects when the hot water in the hot water storage tank 50 reaches a predetermined amount (an amount suitable for rinsing the tableware 14). It detects the hot water level when it increases and generates a detection signal. The detection signal from the hot water level detection switch 90 disappears when the hot water in the hot water storage tank 50 decreases below the predetermined amount minus an amount corresponding to the hysteresis width of the hot water level detection switch 90. Note that a float switch is employed as the hot water level detection switch 90.

The microcomputer 100 executes the main control program and the interrupt control program according to the flowcharts shown in FIGS. 4 and 5, and during this execution, the cleaning motor 30a and the rinse motor 4
0a, hot water supply valve 60a, extension continuation display lamp 160
and performs arithmetic processing for drive control of each of the drive circuits 110 to 150 connected to the abnormality indicator lamp 170, respectively. However, the above-mentioned main control program and interrupt control program are executed by the microcomputer 10.
It is stored in advance in the ROM of 0. Furthermore, the microcomputer 100 starts executing the main control program in response to power supply from the commercial power source via the power switch 70.
This is done according to the rectification effect on the same feeding power within 0.00. Furthermore, the microcomputer 100 starts the interrupt of the interrupt control program every time a built-in timer (hereinafter referred to as the first timer) of the microcomputer 100 finishes counting a predetermined time. The extension continuation lamp 160 and the abnormality indicator lamp 170 are provided at appropriate locations on the outer wall of the cleaning chamber 10 together with the power switch 70.

In this embodiment configured as described above, when the power switch 70 is closed, the microcomputer 100 resets and starts the first timer and starts the main control program at step 200a according to the flowchart of FIG. Execution is started, initialization processing is performed in step 210, and the process moves to execution of the initial hot water supply routine 220. In this initial hot water supply routine 220, the rinse motor 40a generated from the microcomputer 100
The drive circuit 120 drives the rinse motor 40a in response to a rinse motor drive signal for driving the rinse motor 40a;
Accordingly, the rinsing pump 40 pumps hot water in the hot water storage tank 50 through the pipe _P3 , and pumps it through the pipe _P4 to each rinse nozzle 12a, 12b together with the detergent from the detergent supply system. For this reason, each rinse nozzle 12a, 12b pumps the same hot water together with detergent into the cleaning chamber.
The hot water is injected into the tank 20 and flows down as cleaning hot water into the cleaning hot water tank 20. After that, when it is detected by an appropriate means that the amount of cleaning hot water in the cleaning hot water tank 20 has reached a predetermined amount, the microcomputer 100 eliminates the rinse motor drive signal and starts the rinse motor 40a.
and the rinse pump 40 is stopped.

If the door close signal from the door switch 80 has disappeared at the end of the execution of the initial hot water supply routine 220, the microcomputer 100 repeats the determination of "NO" in step 230. At this stage, as shown in FIG. 2, when each tableware 14 is placed on the rack 13 and the door of the washing chamber 10 is closed, the microcomputer 100 in step 230
Based on the door close signal generated from the door switch 80, the determination is ``YES'', and in step 230a, the built-in timer (hereinafter referred to as the second timer) is reset and started. Therefore, the second timer starts counting by being reset.

Next, in step 230b, the microcomputer 100 generates a cleaning motor drive signal for driving the cleaning motor 30a, and in response to this, the drive circuit 110 drives the cleaning motor 30a, and the cleaning pump 30 pumps the cleaning water. Washing hot water in the tank 20 is forced into the pipe _P2 through the pipe _P1 . Then, the piping
The washing hot water in P ₂ is sprayed from each washing nozzle 11a, 11b toward each tableware 14.
Wash. In such a case, this cleaning
The process continues while the condition that the timer value T<predetermined cleaning time T ₀ (previously stored in the ROM of the microcomputer 100) is satisfied.

Further, when the first timer reset and started as described above finishes counting the predetermined time, the microcomputer 100 starts executing the interrupt control program in step 300a according to the flowchart of FIG. Therefore, if a detection signal is being generated from the hot water level detection switch 90 at this stage, the microcomputer 100 will
At step 310, the determination is ``YES'', and at step 340, the flag F=1 is set. Thereafter, the microcomputer 100 ends the execution of the interrupt control program at step 300b, and resets and starts the first timer again.

When the cleaning of each tableware 14 is completed due to the establishment of T≧T ₀ , the microcomputer 100
is determined as "YES" in step 240. At this stage, since F=1 has already been established in step 330, the microcomputer 100 is in step 330.
250 is determined as "YES", and in step 250a,
Due to the disappearance of the cleaning motor drive signal, the cleaning motor 30
a and the cleaning pump 30, and proceed to step
At 250b, the second timer is reset and started. Therefore, the second timer starts measuring time by being reset. After that, when the condition that the time value T of the second timer ≧ the rest time Tr (already stored in the ROM of the microcomputer 100) is satisfied, the microcomputer 100 starts the step.
260 is determined as “YES”.

When the computer program proceeds to the rinse control calculation processing routine 260a based on such calculation processing, the microcomputer 100 drives the rinse motor 40a by generating a rinse motor drive signal for a predetermined rinse time, and the rinse pump 40 drains the water in the hot water storage tank 50. Pump hot water through pipe P ₃ and place it
P ₄ and is pumped to each rinse nozzle 12a, 12b. For this reason, each of these rinse nozzles 12a,
12b uses the pressure-fed water as rinsing water for each tableware 14.
and rinse each tableware 14 for a predetermined rinsing time. In such a case, on the premise that F=1, the hot water storage tank 5
Since sufficient hot water for rinsing is stored in the container 0, there is no shortage of rinsing water when rinsing each tableware 14. Therefore, each tableware 14 is cleaned while thoroughly removing the detergent, etc. in the washing water that has adhered to each tableware 14.
4 can be properly rinsed. After this rinsing is completed, when the door of the cleaning chamber 10 is opened, the microcomputer 1
00 is determined to be ``YES'' in step 270 when the door close signal from the door switch 80 disappears. After that, replace each tableware 14 with new tableware 13.
Each time the tableware is placed on the table, the same calculation process as described above is performed to wash and rinse the tableware. On the other hand, each time the first timer finishes counting the predetermined time, the microcomputer 100 repeatedly executes the interrupt control program in the same manner as described above. If the detection signal from the hot water level detection switch 90 disappears at the start of each execution, the microcomputer 100
It is determined “NO” in step 310, and the step
Set F=0 at step 310a, and at step 310b,
The other built-in timer (hereinafter referred to as the third timer) is reset and started, and step 310c is executed.
, a valve opening signal for opening the hot water supply valve 60a is generated. Note that, by resetting the third timer, the predetermined hot water supply time t ₀ (microcomputer 1
(previously stored in the ROM of 00).

As described above, when the valve open signal is generated from the microcomputer 100, the drive circuit 130 opens the hot water supply valve 60a, and the hot water supply source 60 starts supplying hot water into the hot water storage tank 50 through the pipe _P5 and the hot water supply valve 60a. After that, when the time value t of the third timer reaches the predetermined hot water supply time _t0 , the microcomputer 10
0 is determined as "YES" in step 320. If the hot water supply as described above is normal, the hot water level detection switch 90 generates a detection signal when the predetermined hot water supply time t ₀ has elapsed. Therefore, the microcomputer 100 determines "YES" in step 330, and proceeds to step 330a.
At step 340, the hot water supply valve 60a is closed as the valve open signal disappears, and F=1 is set at step 340.

On the other hand, if the amount of hot water supplied from the hot water supply source 60 decreases for some reason, or because the frequency of washing dishes is high, the amount of hot water in the hot water storage tank 50 may be insufficient even though the hot water supply from the hot water source 60 is normal. step
Even if the determination in step 320 is ``YES'', if the determination in step 330 is ``NO'', the microcomputer 100 sets F=0 in step 350, and in step 350a, the valve opening signal disappears. The hot water supply valve 60a is closed, and the execution of the interrupt control program ends at step 300b.

Therefore, as mentioned above, the determination in step 240 (see Figure 4) of the main control program is "YES".
When the microcomputer 100 becomes
At step 250, the latest F=0 at step 350
The second timer is reset and started at step 250a, and step 250a is performed.
At step 250b, a washing extension display signal is generated to indicate the extension of washing of each tableware, and at step 280, F=0.
In step 290, the determination is "NO" based on the condition that the time value T of the second timer<the maximum extension time Tm. Therefore, at this stage, each cleaning nozzle 11a, 11 is operated under the action of pumping out cleaning water from the cleaning water tank 20 of the cleaning pump 30 driven by the cleaning motor 30a.
b continues to wash each tableware by spraying washing hot water.
At this time, the drive circuit 140 turns on the extension continuation display lamp 160 in response to the cleaning extension display signal from the microcomputer 100, so that the operator can visually recognize that the cleaning extension is being continued. In such a situation, the steps of the interrupt control program
When the determination of "YES" at 330 and the calculation processing at each step 330a and 340 are performed as described above,
The microcomputer 100 determines "YES" in step 280 based on the latest F=1 in step 340, and in step 280a, the extension continuation indicator lamp 160 is turned on as the cleaning extension indicator signal disappears.
is turned off, and at step 250a, the cleaning motor 30a and cleaning pump 30 are stopped due to disappearance of the cleaning motor drive signal, and the main control program is advanced to steps 250b and subsequent steps. In this case, since an appropriate amount of hot water exists as rinsing water in the hot water storage tank 50, each dish can be rinsed sufficiently and reliably. In addition, the extension continuation indicator lamp 1 as described above
60 is turned off, the operator can visually confirm that each dish is being rinsed while ensuring an appropriate amount of rinsing water in the hot water storage tank 50.

Additionally, each step 250b, 280 and
Even if the arithmetic processing in step 290 is repeated, if the determination in step 280 is "NO" and the determination in step 290 is "YES", there is some kind of abnormality in the hot water supply as described above. Based on the judgment that there is, the microcomputer 100
In step 290a, the extension continuation display lamp 160 is turned off when the cleaning extension display signal disappears, the cleaning motor 30a and the cleaning pump 30 are stopped when the cleaning motor drive signal disappears, and the above-mentioned abnormality is generated as an abnormality display signal, At step 200b, execution of the main control program is stopped along with execution of the interrupt control program. Therefore, the operation of the device of the present invention can be stopped after an abnormality occurs. Further, when the abnormality display signal is generated as described above, the drive circuit 150 turns on the abnormality display lamp 170, so that the operator can visually recognize the occurrence of the abnormality as described above.

In carrying out the present invention, step 310 is omitted in the flowchart of FIG.
Even if the detection signal is performed every time the detection signal disappears, the same effect as in the embodiment described above can be achieved.

Furthermore, in carrying out the present invention, the hot water level detection switch 90 is not limited to a float switch, and various types of liquid level detection switches, liquid level sensors, etc. Instead of the lamp 170, a liquid crystal cell, an audio display, or the like may be used.

Further, in carrying out the present invention, the extended continuous driving of the cleaning motor 30a after the determination of "NO" in step 250 (see FIG. 4) is not limited to continuous driving, but may be intermittent driving.

[Brief explanation of the drawing]

Fig. 1 is a diagram corresponding to the descriptions of each item of the claims of the utility model registration, Figs. 2 and 3 are overall configuration diagrams of the dishwashing control device according to the present invention, and Figs. 3 is a flowchart showing the operation of the microcomputer shown in FIG. Explanation of symbols, 10...Cleaning room, 11a, 11b
... Washing nozzle, 12a, 12b ... Rinse nozzle, 14 ... Tableware, 20 ... Washing water tank, 30
...Cleaning pump, 30a...Cleaning motor, 40...
...Rinse pump, 40a...Rinse motor, 50
. . . hot water storage tank, 60 .

Claims (1)

[Scope of Claim for Utility Model Registration] A washing pump that pumps out washing water from a washing water tank opened from below into a washing chamber that accommodates dishes in accordance with the drive of a washing motor; a cleaning nozzle that injects cleaning hot water from the cleaning pump to clean the water; a hot water storage tank that stores hot water supplied from a hot water supply source when a hot water supply valve is opened; a rinsing pump disposed in the washing chamber to inject hot water from the rinsing pump so that it flows down into the washing water tank as the washing water, and a rinsing pump for rinsing the dishes after the washing. a rinsing nozzle that injects hot water from the hot water as rinsing water; and a rinsing nozzle provided in the hot water storage tank that detects when the hot water in the hot water storage tank increases to a predetermined amount and generates a detection signal; a detector that is turned off when the hot water in the hot water storage tank decreases from the predetermined amount; and a detector that opens the hot water supply valve in response to the disappearance of the detection signal and closes the hot water supply valve in response to generation of the detection signal. a washing motor control circuit that controls the washing motor to drive the washing motor for a predetermined washing time; and a rinsing motor control circuit that controls the washing motor control circuit to drive the rinse motor after controlling the washing motor control circuit. In the dishwashing control device including a motor control circuit, when the detection signal disappears after the predetermined washing time has elapsed, the washing motor control circuit is activated under the opening control of the hot water supply valve by the hot water supply valve control circuit. The tableware is characterized by being provided with an auxiliary control circuit that causes the control to continue for an extended period and terminates this extended continuation control together with the closing control of the hot water supply valve by the hot water supply valve control circuit when the detection signal is generated. Cleaning control device.