JPH0448116A - Heating device - Google Patents

Abstract

PURPOSE:To prevent a user from unconsciously energizing and heating a heat generating means by providing an energization control means to output a signal, by means of which the heat generating means is prevented from performing the generation of heat, to a heat generation control means when the feed of a power to a source circuit part is stopped and restarted in a state that an operation switch is in an ON-state. CONSTITUTION:When the feed of a power to a source circuit part is stopped once in a state that an operation switch is left in an ON-state and thereafter the feed of a power is restarted, a heat generating part is prevented from starting the generation of heat again without performing some new operation by a user. Namely, through the working of a microcomputer 20, the feed of a power is suspended due to some cause during preheat of a vaporizing cylinder and combustion operation, at this point of time, and operation switch 7 is left in an ON-state, and thereafter the feed of a power is restarted. In this case, a user is prevented from unconsciously preheating the vaporizing cylinder by means of a vaporizing cylinder preheat heater 6, and an accident, e.g. a fire due to careless overheating, can be prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a heating device, particularly to the control of heat generating means.

Hereinafter, a case of a hot air heater using kerosene as fuel will be described as a heating device.

[Conventional technology] Figures 3 and 4 are, for example, Mitsubishi Electric Technical Report/Vow.

57, No. 57, No. 57, No. 57, 1983. FIG. 3 is a block diagram of a control device for the conventional hot air heater, and FIG. 4 is a diagram showing the principle of fuel filling.

In Fig. 3, the CPU (2) of the microcomputer (1) converts the signal from the vaporization 8 preheating temperature sensor (3) into the A/rl converter (
4) converts it into a digital value, determines the preheating temperature of the vaporizer cylinder, and opens and closes a predetermined relay (5) that operates as a heat generation control means to maintain the vaporizer cylinder at a constant temperature that is optimal for vaporizing kerosene. The means for preheating the carburetor cylinder (6) is turned on and off.

When the vaporizer cylinder reaches a certain temperature, it performs the ignition operation.

Combustion begins. The series of operations from preheating to combustion described above is started by turning on the operation switch (7) and supplying electric power from the AClooV power supply (8) via the power supply circuit section (9).

Next, FIG. 4 will be explained. In Figure 4, air for combustion is supplied by a combustion blower fan (10) and a combustion amount switching valve (11).
It is then sent to the vaporizer cylinder (12). On the other hand, air is also fed under pressure to the pressurizing solenoid (13) and the oil level regulator (14). The kerosene passes through a cartridge tank, the oil receiver passes through a tray (not shown), and an electromagnetic pump (1
When 6) is activated, kerosene is pumped up into the leveling device (14) to maintain a constant oil level, and guided into the vaporizer cylinder (j2) using air pressure. Since combustion air is forced into the vaporizer cylinder (12) from the inlet, the kerosene is atomized and atomized the moment it drips from the needle (17). The vaporizer cylinder (]2) is the vaporizer cylinder (1
2) is preheated to a predetermined temperature 2, for example about 400° C., by the vaporizer preheater (18) cast in the vaporizer cylinder. The atomized kerosene is instantaneously gasified in the vaporization tube (12), mixed with air, and combusted in the burner head (I9). The combusted high-temperature gas mixes with air blown from a blower fan (not shown) at the upper rear of the case, and is blown out from a hot air outlet (not shown).

[Problems to be Solved by the Invention 1. Conventional hot air heaters operate as described above, but when the operation switch is turned on, 2. A situation often occurs in which the power supply to the power supply circuit is stopped, the combustion operation is also stopped, and then the power supply is restarted. If the operation switch was kept in the ON state when the power supply was resumed, the preheater would be automatically energized and the vaporizer cylinder would be heated again without any user intervention. .

For this reason, the vaporizing cylinder and eventually the hot air heater reach a high temperature without the user being aware of it, causing a fire or the like. Furthermore, since the vaporizing cylinder is heated when unnecessary, resources, that is, electrical energy are wasted. There was a problem.

This invention was made in order to solve the above-mentioned problems, and provides a heating device that prevents the heating device from being energized and heated without the user being aware of it. The purpose is to obtain.

[Means for Solving the Problems] A heating device according to the present invention includes a power supply circuit section that receives power from a power source, a heat generating means that generates heat when energized from the power supply circuit section, and a control regarding the heat generation of the heat generating means. A heat generation control means and an energization control means for outputting a signal to the heat generation control means to prevent the heat generation means from generating heat when turning on/off a heat generation command for the heat generation means to the heat generation control means. It was established.

[Operation] When the power supply is restarted after being stopped, the heating means will not start generating heat again unless the user performs some new operation.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a block diagram of a control device for a warm air heater according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the characteristic operation of the hot air heater according to the present invention shown in FIG.

In Figure 1, symbols (1), (3), (5) to (9)
) indicate the same or equivalent parts as shown in FIG. 3, and therefore the explanation will be omitted as appropriate.

Reference numeral (20) is a microcomputer, and the one shown in FIG. 1 has the same functions as the conventional example shown in FIG. 3, as well as the function of 1 energization control means.

(21) is a safety switch, safety switch (2])
By turning on the microcontroller (
The function as the energization control means of 20) is activated (22)
is an abnormality warning display section.

Next, the characteristic operation of one embodiment of the present invention will be explained in the first part.
This will be explained based on the diagram and FIG.

Power is supplied to the power supply circuit section (9) and the 2-operation switch (7) is turned on.
) is in the on state (hereinafter referred to as ON as appropriate) and the preheating or combustion operation is in progress (step S1), the safety switch (
21) is turned ON, the microcomputer (20) starts functioning as a Stella energization control means (character≠Imo-A-S).

If the safety switch (2]) is left OFF in step S, the process advances to step S3. When proceeding from step S to step S3, the process from step $3 to step S6 or step Sll is as follows.

Since this is basically the same as when dealing with a conventional device, the explanation will be omitted.

When the safety switch (21) is turned on in step St, during preheating or combustion operation, the operation switch (7) may be turned off due to reasons such as accidentally tripping over the power cord and disconnecting the outlet, or a power outage caused by an external factor. Even if it is left ON, the power supply may be interrupted and the preheating and combustion operations may also stop (step.

Bu S,).

If the user immediately switches the operation switch (7) to the OFF state (hereinafter referred to as OFF as appropriate) while the power supply is interrupted, steps SIQ to SL+ are performed.
Proceed to. In this case, the user is aware of the interruption of power supply and the switching of the operation switch (7), and there is no safety problem. For this reason, step S. When the user turns off the operation switch (7),
In conjunction with this, the safety switch (21) is also turned off (
Step S, ), return to the initial state and resume power supply (step S), then turn on the operation switch (7) (step S, preheat 8 ignition, combustion (step S)). Follow the process.

Also, in step S+s, turn off the operation switch (7).
If the temperature is left at F, the hot air heater does not operate at all, and is completely turned off (step S).

On the other hand, in step SIO, if the user leaves the hot air heater as is and does not turn the operation switch (7) back to OFF, the process proceeds to step SI4. Step S
I4 represents a state in which power supply to the power supply circuit section (9) is resumed. In the state of step S+4, electric power is supplied and the operation switch (7) is also ON. In this state, the microcomputer (20) controls the vaporizer cylinder preheating heater (6 ) to prevent preheating of the vaporization cylinder (12). In addition, the display section (
22), it is displayed that the safety switch (21) is ON and the carburetor preheater (6) is not energized (step S, . . .).

When the user notices an abnormal condition from the display on the display (22), etc., and turns off the operation switch (7),
The safety switch (21) turns OFF in conjunction with the OFF switching of the operation switch (7).
The function of the microcomputer (20) as the energization control means is canceled and the display on the 1 display section (22) also disappears (steps S, 7).
. Then, when the operation switch (7) is turned ON again (Step, S, S), electricity is applied to the carburetor preheater (6), and when the carburetor (]2) reaches a certain temperature, it ignites and starts combustion. (Step SS). If the operation switch (7) is left OFF in step S18, the two hot air heaters do not operate at all, and the entire system remains OFF (step S1).

As described above, in the warm air heater according to the above embodiment, when the safety switch (21) is turned on, the microcomputer (20) functions as the energization control means.

Due to the action of this microcomputer (20), if the power supply is interrupted for some reason during preheating of the carburetor cylinder (12) or combustion operation, the operation switch (7) is left ON at that point, and the power supply is then resumed. When the vaporizer cylinder preheater (6) is restarted, the user unconsciously switches the vaporizer cylinder
), it is effective in preventing accidents such as fires due to inadvertent overheating.

Furthermore, since electricity is not applied to the carburetor preheater (6) when unnecessary, there is also the effect that power consumption can be prevented.

Furthermore, by displaying the abnormal condition on the second display section (22), the user can see the warning display on the display section (22), and the hot air heater at that point will be switched to the operation switch (a). It is also possible to confirm that the power supply has been interrupted and then resumed by leaving it ON, which is useful for taking appropriate measures.

In the above embodiment, a kerosene-type hot air heater is used as the heating device, but in other embodiments, other heating devices such as a gas-type hot air heater, a stove, an electric stove, etc. It is also possible to apply to 2
You can get the same effect.

Also, in the embodiment, it was described that whether or not the microcomputer (20) is to function as the energization control means is selected by turning on and off the safety switch (21), and the switch is switched as appropriate. For example, it is also possible to link the on/off of the operation switch (7) and the on/off of the function of the energization control means, and the same effect can be obtained.

In addition, the above embodiment can also be applied to a warm air heater with a mechanism in which a series of operations of preheating, ignition, and fuel are performed by operating one operation switch (7). Yes, in such a device, if the safety switch (2) is left open even when the preheating mode switch is turned on and the preheating state is maintained, the function as a power control means for the microcomputer (20) will work. .

[Effect of the invention] The heating device of this invention is as described above.

Even if the power supply control means functions and the power supply to the power circuit section is stopped once while the operation switch is in the ON state, and then the power supply to the power supply circuit section is resumed, the user may unconsciously This has the effect that the heating means does not generate heat, and accidents such as fires due to inadvertent overheating can be prevented. Furthermore, since the heat generating means is not energized when unnecessary, there is also an effect that power consumption can be prevented.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a control device for a warm air heater according to an embodiment of the present invention, FIG. 2 is a flowchart showing the characteristic operation of the hot air heater according to the present invention shown in FIG. 1, and FIG. The figure is a block diagram of a conventional hot-air heater control device, and FIG. 4 is a diagram of the combustion principle. In the figure, (5) is a relay, (6) is a carburetor preheater, (7) is an operation switch, (9) is a power supply circuit,
(20) is a microcomputer (energization control means). Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] A power supply circuit unit that receives power from a power source, a heat generation unit that generates heat by energization from the power supply circuit unit, a heat generation control unit that controls the heat generation of this heat generation unit, and the above-mentioned heat generation for this heat generation control unit. an operation switch that turns on and off a heat generation command for the means; when the operation switch is in the ON state and power supply to the power supply circuit section is stopped or restarted, the heat generation means causes the heat generation control means to generate heat; A heating device characterized by comprising an energization control means that outputs a signal to prevent the heating from occurring.