JPS59215535A - Control circuit of hot water supply machine - Google Patents

Abstract

PURPOSE:To improve efficiency at the time of repairing at a selling agent or a selling company, through which a burdon to be imposed on a user is lightened also, by classifying and displaying contents by a digital indicator through a symbol and a figure when an abnormal state of a hot water supply machine and a trouble of parts are generated. CONSTITUTION:When the signal of detection of flame is not applied to a microcomputer 23 even after the lapse of a fixed period of time irrespective of a matter that a burner 13 has started operation, ''1'' (error 1) is displayed by a digital indicator 33 in preference to display of an operating state and at the same time action of the burner 13 is suspended also. This is the display showing shortage of fuel oil. Then when a detecting electrode 17 of an empty tank and an earthquake detector 19 are operated respectively ''2'' or ''3'' is displayed respectively on the digital indicator 33. The former and the latter of those become displays urging water supply to a user and resetting of the earthquake detector respectively. The burner 13 is suspended at this time too.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a control circuit for a water heater, and in particular, it is equipped with a digital display that displays all the operating conditions of the water heater, and also detects abnormal conditions or component failures of the water heater. When a problem occurs, its contents are classified and displayed using symbols, numbers, etc. on the digital display.

Conventional configuration of gutter and 'problems' In conventional water heater control circuits, the operating status (f) is generally displayed using a lamp or LKI (Light Indicator (LKI)); "enter", "
1 operation of the heating means.

Many of them simply monitored the normal status of the device, such as the status of ``stop.''Also, even if there was a display that indicated an abnormal status of the device, the content was unclear.

The power of the abnormality indicator lamp on one display or the display of typical abnormal conditions on two or three indicators has been reduced.

FIG. 1 shows the configuration of a display panel section of a conventional oil water heater. 1 to 4 are LED indicators, 1 is the "operation" lamp that monitors the normal operation of the equipment, and 2 to 4 are the "oil drain" lamps.
”, “Water detection”, and “Earthquake” abnormality indicator lamps.

In this example, even if all abnormal conditions are displayed (a), the contents are limited to those that alert the user and require the user to take action. Therefore, when an abnormal condition occurs due to a defective component inside the device, no display is given, and the device may stop or perform irregular operations. In these cases, the store.

The sales company performs the repairs, but it is not easy to discover where the failure is in the equipment, which means that it takes more time and effort, and the costs required for repairs are also high. 1, and there is no abnormality indication, or 1
There are many problems like this, which are to be dealt with by the user.

In many cases, we had to ask the dealer or sales company to do it for us. And the display of these failure details is one in one conventional one.
If a single display device were used to indicate each phenomenon, the number of displays would increase, which would take up more space, and the display would be difficult for the user to see. Furthermore, the display device that is intended to display the details of the failure must also clearly contain a description, which is not good for the appearance of the product.

Therefore, in order to deal with these problems, abnormal conditions of the water heater are displayed using numbers, symbols, etc. to make them easier to read.

It is also possible to increase the efficiency of dealers, sales companies, etc. at the time of repair by displaying many types of defects and also by displaying internal defects of devices according to their contents.

However, when multiple failures occur at the same time, only one failure is displayed at the same time. Once the repair person at the dealership has repaired one fault, the remaining faults will be displayed. There is no problem if it can be repaired immediately at that time, but depending on the nature of the failure, the ATI may need to prepare replacement parts and have to start over again, which leads to the problem of lower repair efficiency.

Purpose of the Invention In view of the above-mentioned conventional problems, the present invention makes it possible to display the normal state of a water heater using numbers or symbols, thereby making the display device simpler and capable of displaying many types. The purpose is to increase the efficiency of repairs at dealers, sales companies, etc., and to lighten the burden on users.

Structure of the Invention The basic structure of the present invention in order to achieve all of the above objects is as follows: sensors such as thermistors that detect various states of the water heater; detection circuits that transmit signals from these sensors to control means; The water heater is equipped with a control means for controlling the heating means of the water heater based on a detection signal, and a digital display for displaying the status of the water heater driven by the side means. .

DESCRIPTION OF EMBODIMENTS FIG. 2 is a longitudinal cross-sectional view of an oil water heater according to an embodiment of the present invention. 1o has a water supply port 11. A heat exchanger 13 is equipped with a hot water supply port 12, a combustion device 13 is a combustion device equipped with an electromagnetic pump, a fan motor, an ignition device, etc., and 14 is a combustion device that performs combustion entirely within the heat exchanger 10. A baffle plate 15 is used to transmit the heat to the heat exchanger 10, which has high thermal efficiency, and an exhaust port 11) is used to release the exhaust gas that has undergone heat exchange. 16 to 19 are sensors, 16
17 is a thermistor that detects the temperature of hot water in the heat exchanger 10; 17 is an empty tank detection electrode that also serves as an anticorrosion effect in the heat exchanger 10;
1B is a flame detection element such as a phototransistor that monitors the entire combustion state of the combustion device, and 19 is an earthquake detector that is activated by the vibration of the equipment, each of which is connected to the user equipment via a signal line.

FIG. 3 is a block diagram of the grinding circuit of this embodiment.

2o is a remote control unit (remote controller), and a 6111 circuit 22 that controls 1till of the main body is connected to the main body by a cable wire 21 with a 7-core configuration.
is connected to. The main body side control circuit 22 is equipped with a microcomputer 23 which is a main means of control.
The signals from various sensors on the main body are sent to the microcomputer 2.
a signal detection circuit 24 for transmitting the signal from the thermistor 16 to the microcomputer 23; and a temperature control circuit 25 for transmitting the signal from the thermistor 16 to the microcomputer 23; System (
property) means 26, a driver circuit 27 that performs all of the driving thereof;
is connected. A system power supply 28 supplies power to these circuits, and the system power supply 28 also supplies power to the remote control 20 at the same time.

On the other hand, the remote control 20 is connected to a temperature control circuit 25, a temperature control volume 29 for setting the water temperature of the water heater, and a microcomputer 23 through three signal lines (data, clock, and strobe). computer 2
It is equipped with a foot register circuit 30 for converting the serial data sent from 3 into fully parallel data, and furthermore, a part of it (17-t
The switch circuit 31 and the rest are input to a decoder circuit 32. The digital display 30 is driven by the signal decoded by the decoder circuit 32. On the other hand, the switch circuit 31 transmits a signal from the remote control 20 to the microcomputer 23 of the operation switch.

FIG. 4 is an external view of the remote controller of this embodiment, showing the digital display 33. Operation switch 34. The operation lamp 36, temperature control volume 29, etc. are on the front and can be operated or displayed.

The table below shows the status of the kerosene water heater of this embodiment, the contents displayed on the digital display at that time, and the operating status of the combustion device.

Table: Water heater status and digital display FIG. 5 is a schematic flowchart of the functions of the microcomputer 23. First, signal scraping circuit 24
．． The data input from the temperature control circuit 25 is judged, and if it is abnormal, the data corresponding to the content is set on the all-digital display 33 (J!'1 to 16) and the combustion device 13 is stopped. If the input signal is normal, display data of the operating state is set on the all-digital display 33 by a combination of various signals. Next, according to the signal from the switch circuit 31 and the boiling signal, when the operation switch 341 is turned on (ON) and there is no boiling, the combustion device 13 is activated and the operation switch 34 is turned on.
The combustion device 13 is stopped during 1 - OFF, 1 boil - 1, and 1 υ1. And finally remote control 2
Output all data to be transmitted to 0.

Next, the operation of this embodiment will be explained.01 First, the state td of the thermistor 16 is taken into the temperature control circuit 26, and is constantly compared with the signal of the temperature control volume 29, and the result is transmitted to the microcombi coater 23. be done. At the same time, the state of the thermistor 16 changes to the upper limit of the resistance value of 7- (
(disconnection) and lower limit value (short circuit), and the results are also sent to the microcomputer 23. Further, an empty tank detection electrode 17, a flame detection element 18. The state of the earthquake detector 19 is also
The signal is transmitted to the microcomputer 23 via each signal detection circuit 24. Therefore, when all these signals are normal, turn on the operation switch 34 using the remote control 20.
Then, an operation start signal is transmitted to the microcomputer 23 via the switch circuit 31, the microcomputer 23 drives the burner pricking means 26 via the driver circuit 2, and the combustion device 13 starts operating. and,
When combustion starts, the flame detection element 18 detects this and transmits it to the microcomputer 23.

When the temperature of the hot water rises, a signal is sent from the thermistor 16 to the temperature control circuit 25.

The microcomputer 23 stops driving the combustion device 13 when it receives the "boil" signal.

Next, the entire operation in the event of an abnormality (failure) will be explained. First, even though the combustion device 13 has started operating.

If the flame detection signal is not input to the microcomputer 23 even after a certain period of time has elapsed, the digital display 33 will display "1" (error 1) in priority to the operating status display.
At the same time, the operation of the combustion device 13 also stops. This is a display that shows the entire oil-out condition.

Also, if the empty tank detection electrode 1 and the earthquake detector 19 are activated, the digital display 33 will show "2" or "3".
” is displayed respectively. The former will prompt the user to pay for water, and the latter will prompt the user to reset the earthquake detector.

At this time as well, the combustion device 13 is stopped. rIJ,
``2J・The displays in [3-1] are all the contents that the user performs in the process.

Next, when a signal such as a short circuit or disconnection of the thermistor 16 is transmitted from the temperature control circuit 25 to the microcombination 23, the display 33 displays r4J, r5J.
t respectively, and the combustion device 13 is stopped. The driver circuit 27 gold is not driven, but the flame detection circuit 24
If the ignition signal is input from the ignition signal, it is determined that the flame detection circuit 24 across the flame detection element 18 has clearly failed, and "6" is displayed on the digital display 33, and from then on, the combustion device 13 Avoid driving.

In the case of r4J, r5J, and r6J shown below, the processing must be done by the dealer or sales company. However, since the user already has a rough idea of what the problem is, repairs can be expected to be very quick, and if the user also mentions the display number when contacting the retailer or sales company.

Dealers and sales companies can generally limit the parts and tools they need to bring with them, so in that sense, they have an advantage. In particular, since multiple failures can be detected at the same time, there is no need to restart work due to parts shortages.

Of course, even in the case of displaying [14, r2J, r3J, the content to be processed becomes clear to the user, which improves usability.

Effects of the Invention As described in 2, according to the present invention, the operating status information is displayed at all times, and the contents are displayed at abnormal times, making it easier to see compared to conventional lamp displays. By using a display with fewer types of displays, cost performance is improved. Furthermore, not only the operating condition of the water heater, but also
Multiple malfunctions of one's own parts can be notified by alternating display using a switching display, which has the effect of improving repair and serviceability for users, dealers, and sales companies. .

[Brief explanation of drawings]

Fig. 1 shows the display and structure of the channel part of a conventional kerosene water heater, and Fig. 2 is a vertical cross-sectional view of an kerosene water heater according to an embodiment of the present invention.
FIG. 3 is a block diagram of the pricking circuit. FIG. 4 is a perspective view showing the appearance of the remote controller, and FIG. 5 is a schematic flowchart of the microcomputer. 10... Heat exchanger, 13... Combustion device (heating means), 16... Thermistor (sensor)
, 17... Empty tank detection electrode (sensor), 1
8...Flame detection element (sensor), 19...
... Earthquake detection element (sensor), 20 ... Remote control (remote control section), 23 ... Microcomputer (side slope means), 24 ... Signal detection circuit, 26
・・・・・・1 means for burner system (heating means), 33...
...Digital display. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 4
Figure π Figure 5

Claims (4)

[Claims] (1) A water heater that has a heating means, a sensor such as a thermistor that detects various states of the water heater, a detection circuit that transmits signals from these sensors to a control means, and a control (control) of the heating means based on the detection signal. ) The operating state of the water heater detected by the control means and the sensor is displayed on a digital display driven by the 1111 means, and the sensor detects an abnormal state of the water heater. or when a failure occurs in the sensor or the circuit itself, the water heater control circuit is configured to classify and display the details of the abnormal state and failure on the digital display using numbers, symbols, etc. (2) A control circuit for a water heater according to claim 1, which is configured to switch and display a plurality of displays at regular time intervals when classifying and displaying them on a digital display. (3) The control of the water heater according to claim 1, which is configured to forcibly stop the operation of the heating means in the event of an abnormality in the water heater or a failure of the sensor or circuit itself, depending on the nature of the problem.
goods) circuit. (4) A control circuit for a water heater according to claim 1, wherein a microcomputer is used as the control means.