JPS58184895A - Remote controller - Google Patents

Abstract

PURPOSE:To obtain the remote control of home use boiler having a timer function inexpensively by constituting a circuit having high safety. CONSTITUTION:A remote control section 4 is connected to a control circuit 6 at device side through a signal transmission line 5. The circuit 6 converts a serial transmission data signal transmitted from a transmission data signal line 12 in parallel and outputs the result to a latch circuit 16. The latch circuit 16 latches the data with a strobe signal and shares the data to each circuit. A comparison circuit 23 compares the information from a tank with the content of the circuit 16 and outputs its state signal to a main control means 7. If there is a failure in the means 7 and the line 5, an output control signal 16d is a DC signal of ''0'' or ''1'', and an output enable signal 25a outputted from a pump circuit 25 is logical ''0'' and an output enable circuit 24 is cut off.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote control circuit for remotely controlling the main body of a device, and is designed to realize a remote control circuit with a simple circuit configuration that takes safety in particular into consideration, and is suitable for home boilers, hot water heaters, etc. It is intended to be applied to remote control of machines, etc.

Generally, boilers, water heaters, etc. for home use are installed outdoors or in places such as home mechanical rooms.
Inevitably, there is a need for remote control from a living room such as the kitchen.

Conventionally, the remote control function of such household boilers, water heaters, etc. has been very simple. For example, as shown in FIG.
F, water temperature setting using volume resistor 28, LICI)
29 used to display the status of equipment (e.g., a lamp that indicates when the combustion is in progress), and even though it was called remote control, it simply functioned as an extension cable.However, recently, home boilers, water heaters, etc. For example, by adding a timer function and boiling water in a timely manner at the time set by the timer, we aim to improve convenience, and at the same time, by minimizing the time involved in heat radiation loss of hot water in the tank. There is a growing demand for higher functionality and higher added value in order to improve economic efficiency.

Therefore, the present invention provides a remote control circuit that can remotely control highly functional, high value-added home boilers, water heaters, etc. that have such a timer function, with a highly safe circuit configuration and at low cost. The purpose is to provide

The present invention will be described in detail below based on the drawings.

FIG. 1 is a block diagram showing the circuit configuration of the present invention. 1
is the main body of the equipment such as a boiler, 2 is the tank, and 3 is the heat source. Is heat source part 3 a stone? gas combustor, gas combustor,
It is made up of something like an electric heater.

Reference numeral 4 denotes a remote control section, which is connected to the device-side control circuit 6 via a signal transmission line 6. The remote control section 4 is equipped with a main control means 7 realized by a microcomputer or the like, which controls the device side via a signal transmission line 6, and a numeric display 8 in the remote control section 4. It controls the lamp display 9, human power means 10, etc.

The signal transmission line 6 is composed of a black/yellow signal line 11, a transmission data signal line 12, a strobe signal line 13, and a comparison signal line 14, and the timing of each signal is shown in FIG.

In the equipment side control circuit 6, 16 is a shift register 11 and a star circuit, which converts the serial transmission data signal (DATA) sent through the transmission data signal line 12 into parallel and outputs it to the latch circuit 16. do.

The latch circuit 16 latches the data using the strobe signal (STRB), and sends the Jl level signal 16a to the D-me conversion circuit 19, the channel selection signal 16b to the analog multiplexer circuit 18, and the heat source control signal to the output enable circuit 24. 16C and an output control signal 1sd to the pump circuit 26.

The reference level signal 16a mentioned above is applied to the channel selection signal 1 at the 0th to 7th beats y of the transmission data signal in FIG.
6b is transmitted corresponding to the 8th to 11th bits, the heat source control signal 160 is transmitted to the 16th to 22nd bits, and the output control signal 1ed is transmitted corresponding to the 16th bit. The 12th to 14th bits are undefined.

23 is a comparison circuit, analog multiplexer circuit 1
The output voltage of 8 and the output voltage of the D-me conversion circuit 19 are compared, and a comparison signal of 0" or 1" (5L
GN)- to the comparison signal line 14. That is, the thermistors 21a to 21, which are rumored to be installed on the wall of the tank 2 and monitor the water temperature inside the tank 2,
Among the output signals from C, the empty tank detector 22, which detects whether there is water (hot water) in the tank 2, etc., the channel selected by the analog multiplexer circuit 18 is outputted to the D-channel. By comparing the reference level signal 16a outputted from the conversion circuit 19 with a predetermined reference voltage corresponding to the reference level signal 16a, the main control means 7
The status of the C1 empty tank detector 22, etc. can be notified in the form of O'' or 1''.

The output enable circuit 24 is isometrically a switch means, and it can be considered that the switch means is turned ON-OFF by the output enable signal 2S& from the pump circuit 26. That is, when the output enable signal 26a from the pump circuit 26 is logic "'1", the heat source control signal 1
6G is given to the driver circuit 17, otherwise the power is turned off.

Output control signal 1e input to pump circuit 26
When d is a logic "1", that is, an active signal, it is a rectangular wave pulse train, and at this time, the output enable signal 25a is output in a logic "1" state.

2o is a heat source control means realized by a relay, a tri-ray, an SCR, etc., and drives the heat source section 3 - FIG. 2 shows a partial embodiment of the present invention, 26a, 26
b, 26c are 0MO8 general-purpose IC "4o94",
The internal functional configuration of the shift register circuit 15-1 is as shown in FIG. Latch circuit 16-1. Output enable circuit 2
The score is now 4-1. Its operation is to store the serial data input to the D terminal in the shift register circuit 16-1 using the clock signal input to the OL terminal, and to transfer the serial data to the S
It is latched into the latch circuit 16-1 by the strobe signal input to the T terminal. The latched data is output to the output terminals Q1 to Q8 in response to an output enable signal of "1" inputted to the OE terminal.

Incidentally, when the output enable signal is logic ``0'', the voice terminal is activated. 1 to Q8 are in a high impedance state.

19a is an R-2R type resistor ladder circuit, using a 2ec 0MO8Ic output transistor switch,
This constitutes the D-me conversion circuit 19.

18a and 18b are 0MO8 general-purpose ICs "4o51" and constitute an analog multiplexer circuit 18 having 16 input channels.

17a is a general-purpose transistor array that controls one power supply to the heat source control means 20, which is composed of an ant, an IJ4 array, and the like. 17b is a power switch circuit for controlling the other power supply to the heat source control means 2o, and its control signal is transmitted through the second pump circuit 17c to 0MO8IC[40
It is given from the Qj terminal of 94J 26a. That is =
Only when a rectangular wave pulse train signal is output from the Q+ terminal, the second pump circuit 17c switches to the power switch circuit 1.
It drives the transistor 7b and supplies +12V power to one terminal of the heat source control means 2o.

Therefore, in this embodiment, the transistor array 17a,
A driver circuit 17 is configured by a power supply control circuit 17b and a second pump circuit 17c.

The output control signal 16d is the driver circuit 17 described above.
0MO8IC [-4094
” 26b and is input to the pump circuit 25. Output enable signal 2 is output from the pump circuit 25.
5a is output and connected to the driver circuit 17
8IC "Configure it to be input to the OE terminal of 4o94126a.

6-6 are timing diagrams showing the relationship between the output control signal 16d and the output enable signal 25a.

Now, it is assumed that the signal transmission process shown in Fig. 4 is repeated at a time interval of approximately 2m5EC, and the 15th bit of the transmission data signal (DATA) in Fig. 4 is alternately 0 → 1 → 0.
→1→0..., the output control signal becomes a rectangular wave pulse train with a period of about 4 m SEC as shown in FIG. 5C.

FIG. 6 shows the relationship between the output enable signal 26a and the output control signal 16d. Figure 6 shows the output voltage when the output control signal as shown in Figure 6a is applied to the pump circuit 26, and the logic of 0'' or '1'' is determined by the predetermined threshold voltage VTH. Been the 6th
This is the output enable signal in Figure C.

Therefore, when the main control means 7, the signal transmission line 6, the shift register circuit 15, the latch circuit 16, etc. are normally provided and in operation, the output control signal 16d is approximately 4 m S K as in the embodiment. By outputting a rectangular wave pulse train of C period, an output enable signal in a logic "1" state can be generated via the pump circuit 25.

Conversely, if an abnormality occurs in the main control means 7, signal transmission line 5, etc. and normal signal transmission is not performed, the output control signal 16d will always be a DC signal of "o" or 1. The output enable signal 25& outputted from the pump circuit 25 becomes logic "0", and the output enable circuit 24 enters the cut-off state.

As is clear from the above configuration and explanation thereof, there are the following effects.

(1) Since the above-mentioned output enable circuit 24 is configured to be cut off when signal transmission is not performed normally due to a malfunction of the main control means 7, a mistake in the signal transmission line 6, etc., the heat source control means The heat source control means 2o is prohibited from operating the driver circuit 17 that is intended to drive the heat source control means 2o.
It is possible to stop the power supply to. Therefore, the heat source section 3 does not operate erroneously, making it possible to realize a very safe remote control circuit.

(2) The logic "1" state of the output control signal 16d for making the output enable circuit 24 function is set as a pulse train signal, and this is sent to the output vehicle 5 only by inputting the pulse train signal. ．． By configuring the control terminal of the output enable circuit 24 to be supplied to the control terminal of the output enable circuit 24 through the pump circuit 26 as shown in FIG.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the circuit configuration of the present invention, FIG. 2 is a diagram showing a partially detailed embodiment, FIG. 3 is a partially detailed diagram, and FIG. 4 is a partially timing diagram. 5 is another part of the timing diagram, FIG. 6 is another part of the timing diagram, and FIG. 7 is a circuit block diagram showing a conventional example. ...Remote control section, 5
... Signal transmission line, 7 ... Main control means,
15...Shift register circuit, 16...
・Latch circuit, 17... Driver circuit, 24.
...Output enable circuit. Name of agent: Patent attorney Toshio Nakao and one other person'□
. □ II2 Figure 3 El

Claims (4)

[Claims] (1) A remote control unit for remotely controlling the device main body, a main control means provided within the remote control unit and controlling the device side, and a signal transmission line connecting the device side and the remote control unit; A shift register circuit provided on the equipment side, a latch circuit connected to the output of this shift register circuit, and an output enable circuit connected to the output of this latch circuit for controlling the output signal from the latch circuit. , a remote control device comprising a driver circuit that is connected to the output of the output enable circuit and drives a relay or the like for operating the device. (2) A remote control device according to claim 1, which supplies a control signal for operating the pre-distribution enable circuit from another output terminal of the latch circuit; (3) The control signal for making the output enable circuit function is a pulse train signal, and the output voltage is generated only by this pulse signal. The remote control device according to item 1. (4) The remote control device according to claim 1, wherein a microcomputer is used as the main control means.