JP2000194405A - Device controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device controller capable of significantly improving productivity and reducing costs by parts standardization and wiring simplification. SOLUTION: This controller is provided with a signal line 122, a controller, switching elements 128 which are connected to the line 122 and exchange data with the controller and a pressure switch 177. The switching elements 128 have a storing means stored with a self-ID code, a transmitting and receiving means exchanging data with the controller through the signal line and a controlling means which fetches the state of the pressure switch 177, writes it as data to the storing means and transmits the data in the storing means to a main controlling means through the transmitting and receiving means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for devices such as a dishwasher, a commercial / home refrigerator, a low-temperature showcase, a prefabricated refrigerator, an air conditioner, and a vending machine.

[0002]

2. Description of the Related Art Conventionally, for example, in a dishwasher for business use, washing water in a washing tank is sprayed by a washing pump onto dishes and the like stored in a washing room by a washing pump, thereby cleaning dirt and washing. After that, by rinsing the rinse water (hot water) in the rinse tank with a rinse pump,
The tableware is configured to be automatically rinsed.

Further, a liquid or powdery detergent is supplied from the detergent tank as needed into the washing tank, and a predetermined concentration of washing water is always stored in the washing tank.

[0004]

In such a dishwasher, various sensors for detecting the temperature of the hot water in the washing tank and the rinsing tank are attached, and the number of the sensors varies depending on the model. In addition, if the amount of detergent in the detergent tank can be detected, it is possible to replenish the detergent before it becomes empty. In addition, since the number of mounting parts such as a cleaning pump, a rinsing pump, and a detergent pump for supplying a detergent also differs depending on a model, electric wiring including a contact for controlling the parts and a controller for controlling these parts. The configuration also differs for each model.

[0005] For this reason, the productivity has been remarkably reduced, especially for business-use equipment produced in small quantities by other models, and improvement has been desired.

The present invention has been made to solve the above-mentioned conventional technical problems, and is an apparatus capable of remarkably improving productivity and reducing costs by sharing parts and simplifying wiring. Is provided.

[0007]

A control device according to the present invention includes a signal line wired to a device, a main control unit provided in the device, and a data line connected to the signal line and communicating with the main control unit. Detecting device for sending and receiving, and ON-O according to change of detection target
The detection device includes a switch that changes its FF state, the detection device includes a storage unit that holds its own ID code, a transmission / reception unit that transmits and receives data to and from the main control unit via a signal line, And a terminal-side control means for writing data in the storage means and transmitting data in the storage means to the main control means by the transmission / reception means.

According to the present invention, the terminal-side control means of the detecting device captures the ON / OFF state of the switch, writes it in the storage means as data, and transmits this data to the main control means via the signal line by the transmission / reception means. Therefore, the main control unit of the device can monitor the state of the switch without any trouble.

In this case, the detecting device stores its own I
Since the D code is possessed, the main control means can identify the detection device by connecting the detection device to the signal line, and the wiring of the detection device is completed. Thus, the detection device can be wired by a so-called plug-in, and the wiring can be significantly simplified. In addition, since it is possible to use common software for the main control means regardless of the number of detection devices and the like, it is also possible to significantly reduce costs due to common use.

A control device for a device according to a second aspect of the present invention includes a switching unit, a storage unit, a transmission / reception unit, and a terminal-side control unit.
It has an output mode and an input mode. In the output mode, it controls the switching means based on data from the main control means received by the transmission / reception means. A detection device is configured.

According to the second aspect of the present invention, when the terminal side control means of the switching element constituting the detecting device is set to the input mode, the state of the switch can be monitored by the main control means. In output mode,
Since the switching unit is controlled based on the data from the main control unit received by the transmission / reception unit via the signal line, the main control unit of the device can execute the control of the device without any trouble.

That is, the switching element for controlling the operation of the equipment can be used also as a detecting device for monitoring the state of the switch, and the cost can be further reduced by using common components. It is.

According to a third aspect of the present invention, the main control means includes a display means in each of the above inventions, and when the change in the state of the switch is detected based on data from the detection apparatus, the display means is provided. A predetermined display to that effect is performed.

According to the third aspect of the present invention, in addition to the above-mentioned inventions, the main control means has a display means, and when a change in the state of the switch is detected based on data from the detection device, the main control means displays the display. Since the means is provided with a predetermined display to that effect, a user or a maintenance worker can accurately grasp that the state of the switch has changed.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a dishwasher 1 as an embodiment of a device to which the present invention is applied, FIG. 2 is a front view of the dishwasher 1, FIG. 3 is a plan view of a washing room 3 of the dishwasher 1, and FIG.
Is a vertical front view of the washing room 3 of the dishwasher 1, and FIG. 5 is a wiring diagram of an electric system of the dishwasher 1.

The dishwasher 1 of the embodiment is a so-called under-counter type automatic dishwasher installed in a kitchen such as a hotel, a restaurant, a cafeteria, and the like. Cleaning chamber 3 having opening 5
, And a machine room 4 is formed below the inner box 2.

A stainless steel top table (work table) 7 is provided above the top plate of the inner box 2 at intervals, and a stainless steel top table (work table) is also provided outside the back plate 2B and the left and right side plates 2C and 2C. The exterior plates 8 are attached at a small interval.

A rear left portion of the inner box 2 facing the bottom plate 2D is continuous with a washing tank 9 opened on the upper surface. That is, the washing tank 9 is opened upward below the washing chamber 3, and the whole is located at the left rear part in the machine room 4.

On the other hand, a washing nozzle 11 and a rinsing nozzle 12 are rotatably mounted above and below the washing chamber 3, respectively. The front opening 5 of the cleaning room 3 is provided with a door 16.
To open and close. A control panel 15 is mounted on the upper side of the door 16 as shown in FIG. 1 (omitted in FIG. 2).

On the other hand, the side plates 2C, 2C located on the left and right sides of the lower edge of the front opening of the cleaning chamber 3
3, 23 are attached. The rack on which the tableware is placed is slidably mounted on the rack rails 23 from the front opening.

An overflow pipe 24 is set up in the washing tank 9 in a detachable manner. The upper end of the overflow pipe 24 is opened in the upper part of the washing tank 9, and the lower end of the overflow pipe 24 is a bottom plate (unit base) of the machine room 4 described later. ) Connected to a drain pipe (not shown) outside 4A. A pump filter 27 for preventing foreign matter from flowing into the cleaning pump 26 is attached to the inside of the front surface of the cleaning tank 9 so as to be able to be pulled out upward.

A notch 23A is formed in the rack rail 23 corresponding to the upper part of the pump filter 27, and the pump filter 27 can be pulled out through the notch 23A.

Next, the washing pump 26, the rinsing tank 36, and the rinsing pump 37 are installed in the machine room 4. The suction side of the cleaning pump 26 is fixed to the front surface of the cleaning tank 9 and communicates with the inside thereof. The pump filter 27 is attached to the suction port portion. Further, the cleaning tank 9 is heated by a cleaning heater 9A described later, and stores cleaning water at a predetermined temperature. The upper discharge side of the cleaning pump 26 is connected to the bottom plate 2.
D, which is fixed closely to the lower surface and communicates with the upper and lower cleaning nozzles 11 via a passage (not shown).

Tap water is introduced into the rinsing tank 36 from a pipe (not shown), and the rinsing heater
Rinsing water (warm water) at a predetermined temperature is stored by 6A, and the suction side of a rinsing pump 37 communicates with the rinsing tank. The discharge side of the rinsing pump 37 is connected to the upper and lower rinsing nozzles 1 via a passage (not shown).
It is connected to 2.

At the four corners of the bottom plate 4A, there are pedestals 39.
Is attached. Further, the front opening of the machine room 4 is closed by a machine room panel 38 which can be freely opened and closed. Further, a detergent tank 40 for storing a liquid detergent is provided in the machine room 4, and the detergent tank 40 is connected to a detergent supply pipe 44 via a peristaltic detergent pump 41, for example.

At the tip of the detergent supply pipe 44, a detergent input nozzle 42 is attached. This detergent injection nozzle 4
2 is attached to the bottom plate 2D of the inner box 2 on the left side near the opening 5 of the cleaning chamber 3. The detergent pump 41 is operated every time the washing process is performed, and sends a predetermined amount of detergent from the detergent tank 40 to the detergent supply pipe 44 and throws the detergent into the washing tank 9 from the detergent injection nozzle 42.

Next, in FIG. 5, reference numeral 122 denotes a signal line for transmitting and receiving data. The control box 15 is connected to the signal line 122. The pumps of the cleaning pump 26, the rinsing pump 37, and the detergent pump 41, and the power supply boards 124 of the cleaning heater 9A and the rinsing heater 36A are connected to an AC power supply line (not shown).

The signal line 122 includes a chip-like storage device (memory chip) 125, a chip-like washing tank temperature sensor 127 as a sensor for detecting the temperature of the washing water in the washing tank 9, and a rinse tank 36. A chip-shaped rinsing tank temperature sensor 110 as a sensor for detecting the temperature of the rinsing water in the inside, a chip-shaped switching element 128 attached to the power supply board 124, respectively, and a switching element used as a detecting device as described later .. Are connected via connectors.

FIG. 6 shows the structure of the control box 15. The control box 15 is provided with a controller (substrate) 136 constituting a main control unit. The controller 136 includes a CPU (microcomputer) 131, a memory 132 as storage means,
An I / O interface 133 and a bus I / O interface 134 as transmission / reception means are provided. The control box 15 is provided with a display 137 constituted by a liquid crystal display panel, a switch 138 as input means (keyboard, mouse, etc.), a switch 139 as switching means, and the like. 137 and switch 138 are I / O interface 1
33 connected to an operation panel (not shown).

The bus I / O interface 1
Reference numeral 34 is connected to the signal line 122 via the switch 139, and exchanges data with the storage device 125, the temperature sensors 127 and 110, the switching elements 128... Via the signal line 122. The switch 139 is connected to an external laptop PC P (display / display) via a communication line 142.
An external control device including a keyboard and a mouse), a modem M connected to an external telephone line, and the like are connected.

The switch 139 always connects the bus I / O interface 134 to the signal line 122, but switches the bus I / O interface 134 (that is, the control box 15) according to an instruction from the controller 136 or the personal computer P. Disconnect from signal line 122 and
And the modem M, and connect the personal computer P to the signal line 12.
It works to connect to 2.

The controller 136 includes the temperature sensors 127 and 110 and the switching elements 128.
A predetermined communication protocol for performing data communication with the storage device 125 and the personal computer P, and each of the sensors 127 and 11 described later.
0, switching element 128, software for searching and identifying storage device 125, display 137
The display image data to be displayed is set.

Each of the temperature sensors 127,
110, switching element 128, storage device 125
And a predetermined communication protocol for performing data communication with the controller and the controller 136, and software for searching and identifying the sensors 127 and 110, the switching element 128, and the storage device 125 described later. I do.

Next, the washing tank temperature sensor 12
7. The configuration of the rinse tank temperature sensor 110 is shown in FIG. Since the sensors 127 and 110 have the same configuration, the cleaning tank temperature sensor 127 will be described below.
The cleaning tank temperature sensor 127 includes a CPU 143 as a sensor-side control unit and a memory 144 as a storage unit.
And an I / O interface 146 as transmission / reception means
, An A / D converter 147, a sensor unit 148 as a detection element connected to the A / D converter 147, a capacitor 149 as a power storage element, a diode 151 as a rectifying element, and the like. .

In this case, the capacitor 149 is connected to the output side of the diode 151, and each element is connected to a connection point between the diode 151 and the capacitor 149.
A potential (high potential) of, for example, +5 V is applied to the signal line 122, and data is composed of pulses that fall from this high potential to a low potential of 0 V, for example.

When the washing tank temperature sensor 127 is connected to the signal line 122, power is supplied to each element as long as the high-potential and low-potential pulse signals constituting data are at the high potential. The capacitor 149 is also charged. While the potential is low, the capacitor 149
, And the power of each element is covered.

The cleaning tank temperature sensor 127 has Vc
A c (DC + 5V) power supply terminal 145 is also provided, which is connected to a connection point between the diode 151 and the capacitor 149. The cleaning tank temperature sensor 127 connects the Vcc power supply terminal 145 to a power supply line, so that each element operates as a power supply. It is configured to be able to operate by power supply from a line. That is, in this case, each element operates without filling the capacitor 149, so that the convenience is improved when it is desired to quickly operate the cleaning tank temperature sensor 127 at the time of inspection or the like.

Further, the CPU 143 takes in the temperature data detected by the sensor section 148 via the A / D converter 147 and temporarily writes it into the memory 144. Then, when polling from the controller 136 via the signal line 122 by the I / O interface 146, the memory 144
Temperature data written to the I / O interface 1
46 to the controller 136 via the signal line 122.

Here, the memory 144 is used to communicate the ID code of the washing tank temperature sensor 127 itself, identification data indicating that the sensor is a sensor, set value data such as a low / high temperature alarm temperature, and data communication with the controller 136. And the like are stored. If a failure has occurred in the cleaning tank temperature sensor 127, the failure data is also written to the memory 144, and the controller 13
6 is sent.

On the other hand, FIG. 8 shows the configuration of the switching element 128 provided on the power supply board 124 for controlling the cleaning pump 26, the rinsing pump 37, the detergent pump 41, the cleaning heater 9A and the rinsing heater 36A, respectively. . The switching element 128 includes a CPU 158 as terminal-side control means and a memory 159 as storage means.
And an I / O interface 161 as transmission / reception means
And an I / O interface 162 as a driver
And a transistor 163 as switching means connected to the I / O interface 162, a capacitor 164 as a power storage element, and diodes 166 and 167 as rectifying elements.

In this case, the capacitor 164 is connected to the output side of the diode 166, and each element is connected to a connection point between the diode 166 and the capacitor 164.
When the switching element 128 is connected to the signal line 122, power is supplied to each element as long as the high-potential and low-potential pulse signals constituting data are at high potential as described above, and the capacitor 164 is also supplied. Charged. And
While the potential is low, the capacitor 164 is discharged to supply power to each element.

The switching element 128 also has a Vcc (DC + 5V) power supply terminal 1 connected to a connection point between the diode 166 and the capacitor 164 as shown by a broken line in FIG.
If the Vcc power supply terminal 55 is provided and this Vcc power supply terminal 155 is connected to a power supply line, each element of the switching element 128 can operate even when power is supplied from the power supply line. That is, in this case, each element operates without filling the capacitor 164, so that the convenience is improved when the switching element 128 is to be quickly operated at the time of inspection or the like.

The CPU 158 is switchable between an output mode and an input mode and can be set.
The switching element 128 provided above is in the output mode. In this output mode, when ON / OFF data is transmitted from the controller 136 via the signal line 122 by the I / O interface 161, the transistor 163 is turned ON / OFF by the I / O interface 162 based on the ON / OFF data. Turn off. The collector terminal of the transistor 163 (indicated by S2 in FIG. 8) and the I / O interface 162 are connected via a diode 167.

Here, the memory 159 stores an ID code of the switching element 128 itself, identification data indicating that the element is a switching element, a protocol for performing data communication with the controller 36, and the like. Also,
When a failure occurs in the switching element 128, the data is also written to the memory 159 and transmitted to the controller 136.

The switching element 128 is connected to the power supply board 1
The switching unit 168 is wired on the reference numeral 24 as shown in FIG. That is, 169 is a photocoupler composed of a photodiode 169A and a phototriac 169B, 171 is a resistor, 172 is a diode as a rectifying element, and 173 is a capacitor 174 as a power storage element.

In this case, the capacitor 174 is connected to the output side of the diode 172, and the resistor 171 and the photo-detector are connected between the connection point between the diode 172 and the capacitor 174 and the collector terminal (S2 in FIG. 8) of the transistor 163 of the switching element 128. Diode 169A is connected in series. The terminal S1 (FIG. 8) of the switching element 128 is connected before the diode 172. And
Phototriac 169B has AC power line and cleaning pump 2
6. Rinse pump 37, detergent pump 41, cleaning heater 9
A, between the rinse heater 36A.

When the diode 172 is connected to the signal line 122, power is supplied to the photodiode 169A via the resistor 171 while the high-potential and low-potential pulse signals constituting data are at the high potential. , The capacitor 174 is also charged. While the potential is low, it is discharged from the capacitor 174 to supply power to the photodiode 169A.

Similarly, if the Vcc power supply terminal 160 is connected to the connection point between the diode 172 and the capacitor 174, and this Vcc power supply terminal 160 is connected to the power supply line, the photodiode 169A operates even when power is supplied from the power supply line. Will be able to do it. That is, in this case, each element operates without filling the capacitor 174, so that the convenience is improved when it is desired to quickly operate at the time of inspection or the like.

Next, FIG. 10 shows the structure of the switching element 128 used as a detecting device as described above. still,
The configuration of the switching element 128 itself is the same as that of FIG. In this case, the switching 128
Of the transistor 163 (terminal S in FIG. 10)
2) That is, the input side of the diode 167 is connected to the resistor 176 and the pressure sensor 17 connected in series between the Vcc power supply and the ground.
7 (or 178 or 179).

The pressure sensor 177 is connected to the detergent tank 4.
The amount of detergent within 0 is detected, and the contact is turned on (closed) when the amount of detergent is reduced to a predetermined amount, and is turned off (opened) when the amount of detergent is more than that. A pressure sensor 178 detects the amount of rinsing water in the rinsing tank 36 and similarly turns the contacts ON and OFF. A pressure sensor 179 detects the amount of rinsing water in the washing tank 9 and similarly turns ON and OFF the contacts. It is a sensor.

The switching element 128 is connected to each pressure sensor 1
77, 178, 179, together with the pressure sensor 177, constitute a detergent remaining amount sensor, together with the pressure sensor 178, constitute a rinse tank water level sensor, and together with the pressure sensor 179, constitute a washing tank water level sensor.

In this case, the CPU 158 is set to the input mode. In this input mode, the CPU 158 turns off the transistor 163 to invalidate its operation, and takes in the potential of the terminal S2 via the diode 167. Then, the memory 159 writes whether the potential of the terminal S2 is the high potential “H” or the low potential “L”.

When polling is performed from the controller 136 via the signal line 122 by the I / O interface 161, “H” written in the memory 159 is output.
The “L” data (data relating to the state of the pressure switch) is transmitted to the signal line 12 by the I / O interface 161.
2 to the controller 136.

The operation of the above configuration will be described. First, it is assumed that the personal computer P is not connected to the switch 139 at first. Each sensor 127, 110 and switching element 1
28 .. are connected to the signal line 122, the controller 136 (the CPU 131 of)
2 is searched for the connection status of each element (sensors 127 and 110, switching element 128,..., Storage device 125).

In this case, the controller 136 makes an ID request to all the sensors 127, 110, the switching elements 128,..., And the storage device 125, and responds to this request with all the sensors 127, 110, the switching elements 128,. Reference numeral 125 denotes the controller 1
Reply to 36. Controller 136 returns the returned ID
The storage device 125 is connected to the signal line 122 based on a code or the like.
The cleaning tank temperature sensor 127 and the rinsing tank temperature sensor 110 are connected, and the switching element 128 for the cleaning pump 26, the switching element 128 for the rinsing pump 37, the switching element 128 for the detergent pump 41, and the cleaning heater 9A are connected. Switching element 12 for
8, switching element 128 for rinsing heater 36A,
It is recognized that the switching elements of the switching elements 128 for the pressure sensors 177, 178, 179 are connected.

The controller 136 stores the connection status of the recognized temperature sensors 127 and 110, the switching elements 128,..., And the storage device 125 in the memory 132, and thereafter uses this ID code to transfer data to each element. Will be sent.

Next, in the inspection at the time of shipment, the personal computer P is connected to the switch 139. At this time, the controller 136 is disconnected from the signal line 122 as described above. In this state, the personal computer P transmits parameters (data) such as the type, the control method, and the function (each temperature) of the dishwasher 1 to the storage device 125 via the signal line 122. The storage device 125 holds the parameter data transmitted from the personal computer P.

Thereafter, the personal computer P is disconnected from the switch 139, and the controller 136 is connected to the signal line 122 again. When the controller 136 is connected to the signal line 122, the controller 136 accesses the storage device 125 and reads out the parameters written as described above from the storage device 125,
It is stored in its own memory 132. Thus, the setting of the parameters from the personal computer P to the controller 136 is completed.

Next, the controller 136 is turned ON / OF.
F data is supplied to the switching element 128 of the power supply board 124.
And the ID code are transmitted to the signal line 122 to control the pumps and heaters, and the temperature sensors 127 and 11
Data is received from the switching element 128 of 0 or each of the pressure switches 177, 178, and 179, and the following cleaning operation is executed.

That is, the CPU 131 of the controller 136
Polls the sensors 127 and 110 and the switching elements 128... At a predetermined cycle as described above. This polling is performed based on the above-mentioned ID code. The CPU 143 of the sensors 127 and 110 transmits the temperature data to the controller 136 in response to the polling as described above. The CPU 131 of the controller 136 once writes the received temperature data into the memory 132, compares the temperature data from the washing tank temperature sensor 127 with the set temperature in the parameters set as described above, and converts the ON / OFF data. The signal is transmitted to the signal line 122 together with the ID code of the switching element 128 of the cleaning heater 9A.

Switching element 128 of cleaning heater 9A
When the CPU 158 receives ON / OFF data of its own ID code, it turns ON / OFF the transistor 163 based on the received data. This transistor 163
Is turned ON / OFF, the photodiode 169A becomes O
N (emission) / OFF (extinguish), whereby the phototriac 169B is turned ON / OFF, and thereby the cleaning heater 9A is energized / deenergized.

The CPU 131 of the controller 136
Transmits ON / OFF data to the signal line 122 together with the ID code of the switching element 128 of the rinsing heater 36A, and controls energization / non-energization of the rinsing heater 36A.
Thus, the cleaning water and the rinsing water in the cleaning tank 9 and the rinsing tank 36 are maintained at a predetermined temperature (warm water).

Further, the cleaning pump 26 and the rinsing pump 3
7. ON / OFF data together with their ID codes are sent to the switching element 128 of the detergent pump 41 on the signal line 12.
2 and is controlled as described below.

That is, first, the rinsing pump 37 is operated.
Rinsing water (warm water) stored in the rinsing tank 36 is jetted from the vertical rinsing nozzle 12. The injected rinse water drops on the bottom plate 2D, flows into the cleaning tank 9 soon, and is stored as the cleaning water.

[0065] The hot water supply operation is completed and a standby state is established.
Next, a rack on which tableware as an object to be washed is placed is inserted along the rack rails 23 and housed in the washing room 3. Then, the switch 13 of the control box 15
When the predetermined start switch 8 is operated, the washing process is started. In this cleaning step, the controller 136 operates the cleaning pump 26 to inject the cleaning water stored in the cleaning tank 9 from the upper and lower cleaning nozzles 11 toward the dishes. As a result, the dishes are cleaned. The jetted washing water is dropped on the bottom plate 2D and collected in the washing tank 9.
Reused. Further, every time the cleaning process is executed, the controller 136 operates the detergent pump 41 to supply a predetermined amount of the detergent into the cleaning tank 9 as described above.

This cleaning step is performed for a predetermined period, and then the operation shifts to a rinsing step. In this rinsing stroke, the controller 136 operates the rinsing pump 37 in the same manner as described above, and injects the rinsing water in the rinsing tank 36 from the upper and lower rinsing nozzles 12 toward the dishes. As a result, the washing water attached to the tableware is rinsed, and the rinsing water is likewise washed in the washing tank 9.
Flows into.

The water level in the washing tank 9 rises due to the inflow of the rinsing water. However, when the water level becomes higher than the overflow pipe 24, the water flows out therefrom, so that the water level is restricted to the upper end of the overflow pipe 24.

Further, the cleaning water or the rinsing tank 36 in the cleaning tank 9 is executed by executing the cleaning step and the rinsing step.
When the rinsing water in the inside falls to a predetermined water level, the pressure sensor 179 or 178 detects this and turns on the contact. Accordingly, the potential of the terminal S2 in FIG. 10 becomes “L”, and the data held by the switching element 128 becomes “L”.
Becomes

This data is taken into the controller 136 at the time of the next polling, as described above.
Thus, the rinsing water 36 is introduced into the rinsing tank 9 in the same manner as described above, or an operation of opening the valve (not shown) into the rinsing tank 36 is performed. Further, the controller 136 also saves data on the number of times the cleaning operation has been performed in the storage device 125.

Next, when the amount of the detergent in the detergent tank 40 drops to a predetermined amount, the contact of the pressure sensor 177 turns ON, and the potential of the terminal S2 in FIG. 10 becomes "L". As a result, the data held by the switching element 128 becomes “L”.
Becomes This data is taken into the controller 136 at the next polling as described above.

When the controller 136 detects a decrease in the amount of the detergent in the detergent tank 41 by sending and receiving data to and from the switching element 128 of the pressure sensor 177, or when the number of executions of the cleaning process reaches a predetermined number, the controller 1
25, the data is stored in the display 137, an alarm is displayed on the display 137, and a circuit is connected to the modem M by the switch 139. report.

As a result, it is possible to promptly notify that the detergent tank 41 is empty or that the detergent tank 41 is empty, and it is possible to prevent the occurrence of poor cleaning due to running out of detergent. Become.

When the controller 136 detects that the contacts are ON (data is "L") based on the data from the switching elements 128 of the pressure sensors 177, 178 and 179, the display 137 displays as shown in FIG. A window is opened to indicate that the contact has been turned on and the amount of water or detergent has decreased. Accordingly, the user and the maintenance worker can accurately recognize the state of each of the pressure switches 177, 178, and 179.

The contact is turned off by supplying water or replenishing detergent.
(Data is “H”), the controller 136
Closes the window of the display 137.

Further, the controller 136 controls each sensor 12
If the temperature data from 7,110 cannot be taken,
It is determined that the line to the sensor has been disconnected. Further, when data from the switching elements 128... Cannot be taken, it is determined that the switching element 128 has failed or is disconnected. CPU 131 of controller 136
When such a failure occurs, the display 137 indicates that the sensor 127, 110 or the switching element 128 has failed. Then, such data is also stored in the storage device 125.

When the maintenance and inspection (maintenance) of the dishwasher 1 is performed based on such a failure / alarm display or periodically, the personal computer P is connected to the switch 139. As a result, the controller 136 is disconnected from the signal line 122 as described above, and the personal computer P
Are connected to the signal line 122. When a predetermined key operation is performed on the personal computer P, the personal computer P is stored in the storage device 12.
5 to access the failure / alarm data and the data on the number of times the cleaning process is performed.

The maintenance worker (serviceman) can accurately grasp the failure status from the data. In addition, it is possible to quickly determine whether or not the detergent tank 40 should be replenished with the detergent based on the data on the detergent remaining amount and the data on the number of times the cleaning process is performed.

In the embodiment, the pressure sensors 177, 17
Although the remaining amount of each tank is detected at 8, 179, a capacitance sensor or the like may be adopted. Further, although the present invention has been described in the embodiment with an automatic dishwasher, the present invention is not limited thereto, and various electric devices such as commercial / home refrigerators and low-temperature showcases, prefabricated refrigerators, vending machines, or automobiles,
The present invention is also effective for home automation and security systems in houses.

[0079]

As described above in detail, according to the present invention, the terminal-side control means of the detection device fetches the ON / OFF state of the switch, writes the data in the storage means as data, and sends and receives the data via the signal line by the transmission / reception means. Since this data is transmitted to the control means, the main control means of the device can monitor the state of the switch without any trouble.

In this case, the detecting device stores its own I
Since the D code is possessed, the main control means can identify the detection device by connecting the detection device to the signal line, and the wiring of the detection device is completed. Thus, the detection device can be wired by a so-called plug-in, and the wiring can be significantly simplified. In addition, since it is possible to use common software for the main control means regardless of the number of detection devices and the like, it is also possible to significantly reduce costs due to common use.

According to the second aspect of the present invention, when the terminal side control means of the switching element constituting the detecting device is set to the input mode, the state of the switch can be monitored by the main control means according to the first aspect. In output mode,
Since the switching unit is controlled based on the data from the main control unit received by the transmission / reception unit via the signal line, the main control unit of the device can execute the control of the device without any trouble.

That is, the switching element for controlling the operation of the equipment can be used also as a detecting device for monitoring the state of the switch, and the cost can be further reduced by using common components. It is.

According to the third aspect of the present invention, in addition to the above-mentioned inventions, the main control means includes a display means, and when the change of the state of the switch is detected by the data from the detecting device, the display means is displayed. Since the means is provided with a predetermined display to that effect, a user or a maintenance worker can accurately grasp that the state of the switch has changed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a dishwasher as an embodiment to which the present invention is applied.

FIG. 2 is a front view of the dishwasher.

FIG. 3 is a plan view of a washing room of the dishwasher.

FIG. 4 is a vertical sectional front view of a washing room of the dishwasher.

FIG. 5 is a wiring diagram of an electric system of the dishwasher.

FIG. 6 is a block diagram of an electric circuit of the control box.

FIG. 7 is a block diagram of an electric circuit of the temperature sensor.

FIG. 8 is a block diagram of an electric circuit of a switching element in an output mode.

FIG. 9 is an electric circuit diagram of a switching unit using a switching element.

FIG. 10 is a block diagram of an electric circuit of a switching element in an input mode.

FIG. 11 is a view showing a window for a pressure switch displayed on a display of the controller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dishwasher 2 Inner box 3 Washing room 4 Machine room 9 Washing tank 11 Washing nozzle 12 Rinse nozzle 15 Control box 26 Washing pump 36 Rinse tank 37 Rinse pump 40 Detergent tank 41 Detergent pump 42 Detergent injection nozzle 44 Detergent supply pipe 110 , 127 Temperature sensor 122 Signal line 128 Switching element 131, 143, 158 CPU 132, 144, 159 Memory 137 Display 139 Switcher 142 Communication line 146, 161 I / O interface 148 Sensor unit 149, 164 Capacitor 151, 166, 167 Diode 163 Transistor 169 Photocoupler 169A Photodiode 169B Phototriac 177, 178, 179 Pressure sensor M Modem P Personal computer

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsumi Maekawa 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Kazuya Imamura 2--5 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (72) Inventor Tsutomu Ishikura 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 3B082 DB01 DC06 5H215 AA20 BB01 CC09 CX05 EE02 GG02 GG05 HH03 KK03 9A001 BB03 BB04 BB06 DD11 HH34 JJ75 KK32 KZ54

Claims (3)

[Claims] A detecting device connected to the signal line for transmitting and receiving data to and from the main control means; A switch for changing an ON-OFF state in accordance with a change in an object, wherein the detection device transmits and receives data to and from the main control unit via a signal line and a storage unit having its own ID code. Means, and terminal side control means for taking in the state of the switch, writing the data in the storage means as data, and transmitting the data in the storage means to the main control means by the transmission / reception means. Control device of the equipment to do. 2. A switching means, a storage means, a transmitting / receiving means and a terminal-side control means, wherein the terminal-side control means has an output mode and an input mode. 2. The apparatus according to claim 1, wherein the detection device is configured by a switching element that controls the switching unit based on data from the control unit, and in the input mode, turns off the switching unit and captures a state of the switch. Control device. 3. The main control means includes a display means, and when a change in the state of the switch is detected based on data from the detecting device, a predetermined display is displayed on the display means. 3. The control device for a device according to claim 1 or claim 2.