JPS602843A - Heater temperature setting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a temperature setting means for a heater.

Structure of the conventional example and its problems The temperature setting means of the temperature control device used in the conventional heater relies on a rotary or sliding variable resistor A as shown in Fig. The air conditioning capacity was varied by comparing the resistance value of a temperature-dependent resistance element such as a thermistor to be detected with the resistance value set by the variable resistor A. In this case, the target set temperature must be set based on the temperature value displayed at the entrance around the moving part of the variable resistor A, and the rattling of the moving part of the variable resistor A should be set as a guide. Considering the deviation, etc., the displayed temperature is expressed as r(
The drawback was that the temperature settings were so crude that they had to be vaguely expressed as "U, r high."

In order to solve the problems of the conventional example described above, we considered setting the temperature using a switch instead of using a variable resistor. The configuration includes at least one switch, and the target value is set in a descending direction or an ascending direction based on the number of times the switch is opened and closed. On the other hand, the number of openings and closings is stored in a counter.
The value stored in the counter is displayed. This eliminates the need for a variable resistor and changes from displacement detection to ON/FF detection, improving reliability and making operation easier and more reliable.

This is because there are problems such as a nuisance when a lamp is lit in the eye. At this time, there is a problem that the setting may be changed due to a child's mischief or unconsciously touching the setting switch, and it is not possible to accurately know this.

OBJECTS OF THE INVENTION The present invention was developed in view of the above-mentioned problems, and is aimed at locking the set temperature when extinguishing a fire.

Structure of the Invention In order to achieve the above object, the present invention provides a gate circuit that opens and closes in response to a signal from the operation switch in the signal path from the output of the setting switch to the counter circuit.
This will cut off the signal from the setting switch.

Description of examples An example of this will be described below with reference to FIG. 2.3.4.

Figures 2', 3, and 4 show an example in which the present invention is used in a hot air heater. Figure 2 shows the upper half of the hot air heater.
FIG. 3 is an enlarged view of a portion of the operation panel 1 of the warm-air heater shown in FIG. 2 related to seismic intensity settings. Pressing the operation switch 2 indicates the heating capacity, etc. The room temperature is detected by the heater 5, and the capacity is automatically varied or the operation is stopped depending on the difference from the set temperature. . 6 is a row of 10 LEDs arranged horizontally, and one of the LEDs corresponds to the room temperature detected by the thermistor 5.
This is a thermo-LED that displays one LED by blinking and one LED corresponding to the set value by lighting.

7 is a down SW that shifts the room temperature set value to the left, that is, to the low temperature side, and 8 is an up switch that shifts the room temperature set value in the opposite direction to SW7. FIG. 4 is a block diagram showing the circuit configuration of the above embodiment. 9 is a thermistor circuit for detecting room temperature; vTH obtained by dividing the voltage between the thermistor 5 and the resistor 10 is input to the A/D converter 11, where it is converted into a digital value; It is communicated to the microcomputer 12. 13 is a switch circuit for setting the room temperature, and the down SW7 and up SWs are pulled down through a resistor 14.15, and the down SW
'Signal line a and up switch that tell that W 7 has been pressed
The signal lines for notifying that s has been pressed are each connected to the microcomputer 12Vc. Furthermore, 16 is a pull-down resistor of the operation switch 2, and a signal line C that indicates that the operation switch has been pressed is also connected to the microcomputer 121pc. 17 starts and stops the hot air heater.

This is a load group that performs sequences such as heating. The inside of the microcomputer 12 is processed by software,
Now, let's explain the software by expressing it in blocks for each function. First, the A/D converter 1 of the thermistor circuit 9.
The room temperature information sent from 1 is held in a 4-bit counter 18 in binary form and is simultaneously transmitted to the entrance of the gate 19 and to the comparator 20. On the other hand, down SW7 is sent from the switch circuit. Opening/closing information of the up SW 8 is transmitted from the transmission buses a and b to the 4-bit counter 24 via the gate circuit 21 and chattering absorption circuits 22 and 23, respectively. In the 4-bit counter 24, a' is 'L
When b' changes to "-" H, the value is incremented by -1, and when b' changes to "L"-"H", the value is incremented by +1.

The value of the counter 24 is determined by the input of the gate 25 and the comparator 20.
The comparator 20 compares the room temperature information transmitted from the counter 18 with the setting information transmitted from the counter 24, and outputs heating capacity variable information to the signal line d based on the magnitude of the comparison. The opening and closing of the gates 19 and 25 are mutually contradictory operations due to the action of the inverting logic element 260, and the output e of the room temperature information and setting information is sent to the PLA 28 via the gate 27 in a time-sharing manner. PLA 28 is a logic element whose input/output logic is determined in terms of nodes, and gate 1
9 or one output line corresponding to the binary value sent out from gate 25 is selected from among 1Q lines. Here, in the gate circuit 27, the output signal C of the operation switch 2 is set to H.
”, input a.

The signals b and d pass through and are cut off when they are L'', and when the operation switch 2 is 0JFO, even if the signals from the down SW a and up SWs are input to the microcomputer 2, the count value of the setting counter 24 does not change. No, the display device is turned off at that time.

In the present invention, any means for displaying the room temperature or set temperature may be used, and in the above embodiment, the microcomputer-5
We used LED as an example from the viewpoint of direct drive, but fluorescent display tubes and neon tubes are also suitable.Furthermore, in addition to horizontal bar display, vertical and diagonal bar display can be considered, and it is also possible to directly drive numerical values. It is okay to display it.

Furthermore, with the present invention, it is possible to preset any value when the power is turned on, that is, in the initial state where the temperature has not been set.
By setting a constant value as the initial value, such as 0° C. or 18° C. for cooling, there is also the effect that there is no need to set the temperature anew under normal usage conditions.

Further, it is not necessary to have two temperature setting SWs, but the same effect can be obtained with just one SW1 for only the descending direction and only for the ascending direction, if they are rotated in a ring shape.

Effect of the invention According to the present invention, the following effects can be expected.

1. When extinguishing a fire, the set temperature is memorized even if the temperature display device does not light up, which saves energy and does not disturb people while they are asleep.

2. The temperature setting value when the fire is extinguished is locked, and when the fire is re-ignited, it will be the same temperature as before the fire was extinguished, so there is no need to set it again.

3. Since a variable resistor is not used to set the temperature, the actual set temperature is not affected by variations in the resistance value of the variable resistor or variations in setting.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional temperature setting example, FIG. 2 is a partial perspective view of the main body in an embodiment of the present invention, FIG. 3 is an enlarged view of the display and operation section of the same main part, and FIG. FIG. 4 is a block diagram showing the configuration of the circuit. 2... Operation switch, 5-... Thermistor, 6
... Temperature display LED, a, 8 ... Setting switch, 12 ... Microcomputer. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Diagram (α) I C Gatsu

Claims (6)

[Claims] (1) At least one switch that sets a target temperature in descending or ascending order, a counter circuit that counts by opening and closing this switch, means for displaying a temperature corresponding to the counted value of the counter circuit, and this temperature display means temperature setting means for setting the temperature corresponding to
Equipped with a gate circuit that is shut off by the heater temperature setting device. (2) The temperature setting device for a heater according to claim 1, wherein the display means is configured to numerically display the set temperature corresponding to the count value of the counter circuit. (3) The display means is composed of a plurality of display elements, and is configured to selectively display one or more display elements corresponding to the counted value. Heater temperature setting device. (4) The temperature setting device for a heater according to claim 1, wherein the display means is configured to disappear when the operation switch is turned off. (5) The switch includes a first switch that acts to increase the count value of the counter circuit, and a second switch that acts to decrease the count value of the counter circuit. Temperature setting device for a heater as described in section. (6) The temperature setting device for a heater according to claim 5, wherein the initial value of the counter circuit is set to a predetermined value.