JP3066262B2 - Dishwasher control circuit - 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 control circuit called a pass-through type.

[0002]

2. Description of the Related Art Conventionally, this kind of dishwasher has an opening facing a washing room, and this opening is closed by a door which can be opened and closed as described in Japanese Patent Application No. 4-29859. Is disclosed. The dishwasher is used in a small-scale dining room or the like, and a rack on which an object to be washed is placed is inserted through one opening and taken out from the other opening. In addition, the entrance and exit of the rack were determined.

The dishwasher is controlled by a microcomputer and can be operated even manually.

[0004]

In the case of such a conventional dishwasher, not only the microcomputer detects the open / closed state of the door at the time of automatic operation, but also the operation at the time of opening the door even in manual operation. It had to be banned.

[0005]

According to a first aspect of the present invention, there is provided a washing chamber which is formed so as to face a loading entrance and a loading exit of a rack on which tableware is placed. When provided entrance of the cleaning chamber, and a carry-in side door for closing the rotatably entrance, provided the carry-out side of the cleaning chamber, and a carry-out side door for closing the rotatably unloading opening Equipped
In dishwashers, the carry-in side door switch provided on the loading side door, with provided on the carry-out side door, and the unloading door switch connected to the entry side door switch in series, tableware said washing chamber To wash the washing water
Connected in series with a manual switching relay that controls the operation of the
While being connected in series to the carry-in side door switch, the
It is connected in parallel with the carry-out door switch to open the carry-in door.
A carry-in door detection device for detecting a state, and the carry-out door switch.
Switch in series with the manual switching relay.
The carry-in side door is connected in parallel with the carry-in side door detection device.
When the closed state is detected after the open state of
Both doors that detect that both doors are closed with the exit door switch
A door detection device, wherein the open state of the carry-in side door is detected.
From the closed state is detected by the double door detection device.
Provided is a control circuit for a dishwasher that enables a washing operation to be performed only when a condition is detected .

According to a second aspect of the present invention, there is provided a control circuit for a dishwasher according to the first aspect, wherein the carry-in side door and the carry-out side door are changeable.

[0007]

[Action] In the present invention of claim 1, the carry-in side door switch, transportable delivery side door switches, manually Dosetsu換relay - a connection in series Then co
The loading side door detection device and the double door detection device
Because the switch is connected in parallel with the switch, the open / close state of the carry-in door is detected by the carry- in door switch, and the open / close state of the carry- out door is detected.
Status is detected by the unloading-side door switch, and the
The closed state is detected after being detected, and the double door detection device
The cleaning operation can be performed only when the closed state of both doors is detected.
The operation of the pump or the like can be prohibited depending on the opening and closing of the door other than the door .

According to the second aspect of the present invention, the carry-in door switch and the carry-out door switch can be changed.
It is possible to change the carry-in side door or the carry-out side door.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a pass-through type dishwasher equipped with the present invention, FIG. 2 is a control circuit diagram of the invention of claim 1,
3 is a control circuit diagram according to the second embodiment of the present invention, FIG. 4 is a flowchart showing the operation of the dishwasher of the present invention, FIG. 5 is a flowchart of a heater control, and FIG. 6 is a flowchart of a hot water supply process.

In FIG. 1, reference numeral 1 denotes a dishwasher main body, which comprises a washing room 2 and a machine room 3 formed below the washing room 2. In the cleaning chamber 2, an upper cleaning nozzle 4a and an upper rinsing nozzle 5a, and a lower cleaning nozzle 4b and a lower rinsing nozzle 5b are coaxially supported and vertically opposed to each other. In addition, a large number of washing water jets 6 for jetting washing water are provided in each of the washing nozzles 4a and 4b, respectively.
Are formed with rinsing water injection ports 7 for injecting rinsing water.

On the other hand, in the machine room 3, a washing tank 11 and a washing pump 12, and a rinsing pump 13 and a booster tank 14 are provided.
When the cleaning pump 12 is driven, the cleaning water in the cleaning tank 11 is pressure-fed to the upper and lower cleaning nozzles 4a and 4b via the cleaning water pipe 8 to be jetted. The rinsing water is heated to about 80 ° C. or higher in the booster tank 14. When the rinsing pump 13 is driven, the rinsing water is supplied to the rinsing nozzles 5a and 5b through the rinsing water pipe 9 and is jetted. Here, the washing water is collected, filtered, cleaned and reused.

By the way, the cleaning chamber 2 has, at opposite side surfaces 16a and 16b, a carry-in port and a carry-out port for loading and unloading a cleaning rack 17 for accommodating dishes to be cleaned into and out of the cleaning chamber 2. A carry-in side door 21A is provided on the carry-in side, and a carry-out side door 21B is provided on the carry-out side. These carry-in side doors 21A and carry-out side doors 21B
Are provided with handles 22a and 22b, and are provided with see-through windows 23a and 23b for viewing the state in the cleaning chamber 2. A carry-in door switch 42 is provided in the carry-in door 21A, and a carry-out door switch 43 is provided in the carry-out door 21B.

Next, a control circuit according to the present invention will be described with reference to FIGS. FIG. 2 shows a control circuit according to the first aspect of the present invention, which is driven by an AC power supply 24. 25 is boo
Switch relay with water supply solenoid valve for supplying water to the star tank 14
31 is controlled. Reference numeral 26 denotes a heating heater provided in the booster tank 14 for heating the water supplied by the water supply solenoid valve 25, and is controlled by a switch relay 32. Reference numeral 27 denotes a heating heater provided in the washing tank 11 for keeping the washing water warm, and is controlled by a switch relay 33. A cleaning pump motor 28 is controlled by a switch relay 34. 2
Reference numeral 9 denotes a rinsing pump motor, which is controlled by a switch relay 35. These are connected in parallel with each other, and during automatic operation, the control board 30 is connected to each of the switch relays 31, 32, 3
3, 34, and 35 are controlled. Reference numeral 36 denotes a water level switch provided in the cleaning tank 11, reference numeral 37 denotes a water temperature sensor for detecting the temperature of the cleaning water in the cleaning tank 11, and reference numeral 38 denotes rinsing water provided in the booster tank 14. Is a water temperature sensor for detecting the temperature of the rinsing water in the booster tank 14. Reference numeral 40 denotes a transformer for converting the AC power supply 24 into a DC power supply in the control board 30.

Reference numeral 41 denotes a manual changeover switch, which is connected to the terminal A for automatic operation, the terminal B for cleaning operation, the terminal C for operation stop, and the terminal D for rinsing operation. Also, 4
4 before Symbol carry-in side door switch 42 and the carry-out side door switch 4
3 is a switching relay switch which is opened and closed by a manual switching relay 45 connected in series with the switching relay 3. These are connected from the right in the order of a carry-in door switch 42, a carry-out door switch 43, and a manual switching relay 45. As shown in FIGS. 2 and 3, the water supply solenoid valve 25, heating heater 26, a warming heater 27, a washing pump motor 28, and a rinsing pump motor 29 are connected in parallel. Reference numeral 46 denotes a photocoupler serving as a carry-in side door detection device, which is connected between the carry-in side door switch 42 and the carry-out side door switch 43 in parallel with the carry-out side door switch. Reference numeral 47 denotes a photocoupler as a double door detecting device, which is connected between the carry-out side door switch 43 and the manual switching relay 45 in parallel with the manual switching relay.

Here, the configuration of the photocouplers 46 and 47 will be described. First, the photocoupler 46 for the loading side door is connected to the phototransistor 48 provided on the control board 30 and the AC power supply 2.
The light-emitting diode 50 is driven by the light-emitting diode 50. Since a direct-current power supply cannot be used due to the use of a DC power source for the control board 30, the light-emitting diode 50 is not used.
The configuration is such that power is supplied to the phototransistor 48 by emitting 0 light. The photocoupler 47 for both doors has the same configuration, and includes a phototransistor 49 provided on the control board 30 and a light emitting diode 51 driven by the AC power supply 24. The light emitting diodes 50 and 51 have resistors 52 and 53 connected in series.

Next, a control circuit according to an embodiment of the present invention will be described with reference to FIG. The same components as those of the control circuit according to the first aspect of the invention are denoted by the same reference numerals.
The configuration different from the invention of claim 1 is that the loading-side door switch 42
Only the configuration of the carry-out side door switch 43 will be described. One end of the manual switching relay 45 is connected to the AC power supply 24, the other end is connected to a photocoupler 47 for both doors, and is connected to the terminal 54A of the first door change switch 54. The first door change switch 54 has a terminal 54B connected to the AC power supply 24 in addition to a terminal 54A connected to the manual switching relay 45. The first door change switch 54 is the unloading side door switch 43.
The carry-out door switch 43 is connected in series with the carry-in door switch 42. A photocoupler 46 for the carry-in side door is connected between the carry-out side door switch 43 and the carry-in side door switch 42. The carry-in side door switch 42 is connected to a second door change switch 55, and the second door change switch 55 is connected to the AC power supply 24.
And a terminal 55B connected to the photocoupler 47 for both doors. Note that the first door change switch 54 and the second door change switch 55 are interlocked, and can change the carry-in side door 21A arbitrarily.

With the above circuit configuration, a control flowchart thereof will be described with reference to FIGS. It should be noted that both the invention of claim 1 and the invention of claim 2 can be achieved by the control of the same flowchart. FIG. 4 is a main flowchart, in which a hot water supply process (step S1) is first performed. The hot water supply process (step S1) is controlled as shown in FIG. 6. Here, a heater control (step S2) is first performed. In the heater control (step S2), the water level switch 36 of the washing tank 11 is turned on by the control shown in FIG.
Is determined (step S3). Here, if the water level switch 36 detects that the water is full (YES; hereinafter, indicated by Y), it is determined whether or not the temperature detected by the heat retention sensor 37 is equal to or lower than the set temperature (step S4).
If the temperature detected by the heat retaining sensor 37 is equal to or lower than the set temperature (Y), the heat retaining heater 27 is turned ON (step S5).
Further, in the case where the water level switch 36 does not detect the full water in the step S3 or the step S4 (NO; hereinafter, indicated by N), or the detected temperature of the heat retention sensor 37 is higher than the set temperature (N). In this case, the heat retaining heater 27 is turned off (step S6). Next, whether or not the water level switch 38 of the booster tank 14 is ON (step S7).
Judge. Heat sensor-3 if full water is detected (Y)
It is determined whether or not 9 is lower than a predetermined temperature (step S8).
When the temperature detected by the heating sensor 39 is equal to or lower than the predetermined temperature (Y), the heating heater 26 is turned on and the water supply electromagnetic valve 25 is turned off (step S9). If the water level switch 38 has not detected that the water is full at step S7 or step S8 (N), or if the temperature detected by the heating sensor 39 is higher than the set temperature (N), the heating heater is turned on. 26 is turned off and the water supply solenoid valve 25 is turned on.
(Step S10).

After performing the above-described heater control (step S2), it is determined whether or not the carry-in side door is closed (step S2).
11) is determined. When the carry-in side door 21A is in the open state (N), the heater control is performed again in step S2, and the operation is continued until the carry-in side door is closed (Y). Loading door 2
When 1A is closed (Y), the heater control is performed again (step S12), and the process is repeated until both doors are closed. When both doors are closed (step S13), the cleaning timer is started (step S14).
Then, a heater control (step S15) is performed. Next, it is determined whether or not both doors are closed (step S16). If the doors are open (N), the process returns to step S2 to perform heater control. If the doors are closed (Y), the cleaning timer is started.
It is determined whether or not the cleaning time has elapsed (step S17). If the cleaning time has not elapsed (N), the process returns to the heater control in step S15. If the cleaning time has elapsed (Y), the rinsing timer is started and the rinsing pump 13 is driven (step S18). )
The tacon control (step S19) is performed. Next, it is determined whether or not both doors are in the closed state (step S20). If the doors are in the open state (N), the rinsing pump 13 is stopped (step S21), and the process returns to the heater control in step S2 to close. If the state (Y), the water level switch 38 of the booster tank 14 is turned on (step S22). If the booster tank 14 is full (Y), the rinsing pump 13 is turned off (step S23). ) And exit.

In step S22, the booster tank 1
If No. 4 does not detect full water (N), a rinsing timer
It is determined whether the rinsing time has elapsed (step S24). If the rinsing timer has passed the rinsing time (Y), the rinsing pump is turned off (step S2).
5) Then, the process returns to the cleaning timer start in step S14. If the rinsing timer has not passed the rinsing time in step S24 (N), the process returns to the heater control in step S19.

When the hot water supply processing in step S1 described above is completed, the above-described heater control (step S26) is performed, and it is determined whether or not the carry-in side door 21A is opened (step S27). When the carry-in side door 21A is in the closed state (N), the heater control of step S26 is performed. If the carry-in side door 21A is in the open state (Y), the heater control is performed (step S28), and it is determined whether or not both doors are in the closed state (step S29). If both doors are not closed (N), step S28
When both doors are closed (Y), the cleaning timer is started and the cleaning pump 12 is turned on (step S30). Then, the heater control is performed again (step S31), and it is determined whether or not both doors are closed (step S32). If both doors are not closed (N), the cleaning pump is turned off (step S33), and the heater control in step S26 is performed.
When both doors are closed (Y), it is determined whether the cleaning timer has passed the cleaning time (step S34). If the cleaning time has not elapsed (N), step S
When the cleaning time has passed (Y), the cleaning pump 12 is turned off, the rinsing timer is started, and the rinsing pump 13 is turned on.
(Step S35). Thereafter, a heater control is performed (step S36), and it is determined whether or not both doors are closed (step S37). If both doors are not closed (N), the rinsing pump 13 is turned off (step S38).
Then, the cleaning pump 12 is turned off (step S33), and the heater control of step S26 is performed. If both doors are in the closed state (Y), it is determined whether or not the rinsing timer has elapsed the rinsing time (step S39). If the rinsing timer has not passed the rinsing time (N),
The heater control in step S36 is performed, and when the rinsing time has elapsed (Y), the rinsing pump 13 is turned off.
(Step S40), and a series of cleaning and rinsing operations are completed. Then, again, the heater control of step S26 is performed.
And perform the next cleaning operation.

The above is the operation in the case of the automatic control. The manual changeover switch 41 shown in FIGS. 2 and 3 sets the position B to the cleaning operation, sets the position D to perform the rinsing operation,
If C positioning the equipment stopped. In addition, manual switching
As for the rail 45, both door switches 42 and 43 are closed and electricity is supplied.
The manual change relay switch 44 is closed
Cleaning pump motor 28 and rinsing pump motor 29
When connected to AC power supply 24 and both doors are closed
And do not drive when both doors are not closed
Like that.

[0022]

The invention of claim 1 according to the present invention is as described above, the carry-in side door switch, transportable delivery side door switches, manually Dosetsu換relay - with a connection in series, the carry-in side door detection device and two doors detection instrumentation
On the relationship connecting the location in parallel to each of the switch, open and closed states of the carry-in side door is detected by carry-door switch, opening and closing state of the unloading door detected by the unloading door switch
The closed state is detected after the open state of the carry-in side door is detected.
When the closed state of both doors is detected by the double door detection device
Only the washing operation can be performed for opening and closing doors other than
Therefore , the operation of the pump and the like can be prohibited6, and highly reliable control can be realized with a simple circuit configuration, so that cost can be reduced.

According to the second aspect of the present invention, since the carry-in side door switch and the carry-out side door switch can be changed,
It is possible to change the entrance door or the exit door,
The user can respond according to the state of use, and the usability of the device can be improved, and a highly reliable device can be realized with a simple circuit configuration, thereby reducing costs. Is what you can do.

[Brief description of the drawings]

FIG. 1 is a front view of a pass-through type dishwasher equipped with the present invention.

FIG. 2 is a control circuit diagram according to the first embodiment of the present invention.

FIG. 3 is a control circuit diagram according to the invention of claim 2;

FIG. 4 is a flowchart showing the operation of the dishwasher of the present invention.

FIG. 5 is a flowchart of a heater control.

FIG. 6 is a flowchart of a hot water supply process.

[Description of Signs] 2 Washing Room 17 Rack 21A Loading Door 21B Loading Door 42 Loading Door Switch 43 Loading Door Switch 45 Manual Changeover Switch 46 Loading Door Detection Device 47 Double Door Detection Device

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A47L 15/42 A47L 15/46

Claims (2)

(57) [Claims] 1. A cleaning chamber formed with a loading and unloading port of a rack on which tableware is placed, and a loading port provided at the loading port of the cleaning chamber and rotatably closing the loading port. A dishwasher provided with a side door and an unloading side door that is provided on the unloading side of the washing chamber and rotatably closes an unloading port, wherein a loading side door switch provided on the loading side door; Discharge-side door switches provided in the discharge-side door and connected in series with the load-side door switch, and dishes in the washing room.
Manual to control the operation of the pump that injects the washing water to be washed
A switching relay is connected in series, and it is connected to the loading side door switch.
Connected in series and parallel with the unloading side door switch
Loading side door that is connected to and detects the opening state of the loading side door
Detecting device, connected in series to the unloading side door switch
And connected in parallel with the manual switching relay
Check whether the entrance side door detector detects the open state of the entrance side door.
When the closed state is detected, both doors are
A double door detection device for detecting that the door is closed,
The closing state is detected after the opening state of the loading side door is detected.
Only when the closed state of both doors is detected by the double door detection device
A control circuit for a dishwasher, which is capable of performing a washing operation . 2. The control circuit according to claim 1, wherein the carry-in side door and the carry-out side door can be changed.