JPS6319713Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a combustion control circuit in a vaporizing oil combustor.

In a combustor that uses combustion heat from the burner to vaporize liquid fuel and combust it into scum, the temperature at which the combustion control circuit of the combustor extinguishes the burner at the upper limit temperature of the heated object and restarts combustion at the lower limit temperature. In the case of a type that includes a control circuit and uses the temperature control circuit to maintain the heated object at a set temperature, the temperature control circuit operates before the temperature of the combustor reaches a sufficient level, and the combustion control circuit turns on the burner. The fuel remaining in the combustor liquefies and accumulates in the combustor, and when it is reburned, it vaporizes again and causes an over-combustion state, resulting in various abnormal combustion conditions. This is accompanied by some inconvenience.

The purpose of the present invention is to obtain a combustion control circuit that does not have such inconveniences.The purpose of the present invention is to provide a combustion control circuit that does not have such inconveniences. In a type in which the combustion control circuit 4 of the combustor 3 is provided with a temperature control switch 5 that extinguishes the burner 1 at the upper limit temperature of the heated object and restarts combustion at the lower limit temperature, the temperature control switch 5 is installed in parallel with the temperature control switch 5. A switch 6 that opens after the lapse of time when the temperature of the combustor 3 reaches a predetermined temperature or higher is intervened.

The ones shown in FIGS. 1 to 4 show examples of vaporizing oil stoves using room air as the object to be heated. In the one shown in FIG. 1, the combustion control circuit 4
Temperature control switch 5 that opens above a certain room temperature
The combustion control circuit 4 is provided with a thermostat 8 for detecting the temperature of the combustor 3, and a relay 9 is inserted in series with the thermostat 8. The relay contact was used as the switch 6 to intervene in parallel with the temperature control switch 5.

In the combustion control circuit 4, 10 is a burner motor, 11 is an electromagnetic pump, and 12 is an ignition transformer.The combustion control circuit 4 also includes a flame detection circuit, a bleed-purge timer circuit, a safety timer circuit, etc. (not shown). These are not particularly different from combustion control circuits commonly used in the past.

The one shown in FIG. 2 has a combustion control circuit 4 similar to that shown in FIG. 4
A timer 13 is inserted to limit the time period for which the combustor 2 reaches a predetermined temperature or higher, and the timer contact of the timer 13 is used as the switch 6 to intervene in parallel with the temperature control switch 5.

3, the a contact point of the relay 15 that intervenes in the room temperature detection circuit 14 is used as a temperature control switch 5, and the combustion control circuit 4 is connected to the power source 7 via the switch 5, and the temperature control circuit 4 is connected to the power supply 7. A timer contact of a timer 16 whose time limit is set at the same time as the excitation of the relay 15 inserted in the temperature control switch 14 is inserted in parallel with the temperature control switch 5 to serve as the switch 6.

The room temperature detection circuit 14 connects a connection point between a negative characteristic thermistor 17 and a resistor 18 connected in series to one input terminal of a comparator 19, and connects a reference potential generation resistor 21 and a resistor 20 connected in series thereto. A relay 15 whose connection point is connected to the other input terminal and whose output from the comparator 19 is connected to the base of a transistor as a switching element 22 which is connected in series to the relay 15 and which is connected in series to the switching element 22. A timer is inserted in parallel with this, and 23 is a timer contact that makes the timer 16 self-hold.

The vaporizing oil stove is shown in Figure 4.
A gas chamber 26 is provided between the combustion tube 24 and an outer tube 25 on its outer periphery to constitute the burner 1. A rotary vaporization tube 27 is provided within the combustion tube 24, and the rotation vaporization tube 27 and the gas chamber 26 are The combustor 3 is constructed by providing a large number of flame holes 28 communicating with each other at the lower part of the combustion tube 24 and communicating with the gas chamber 26 on the inner wall surface of the combustion tube 24. Support the container frame 3
A burner motor 10 for driving the rotary vaporizing cylinder 29 is housed in the lower surface of the burner 1 of No. 1, and a blower fan 30 is provided on the rotating shaft of the burner motor 10, so that the burner is vaporized in the vaporizer cylinder 24 by the air blown by the blower fan 30. The fuel is pumped into the gas chamber 26. In the figure, 31 is a combustion diffusion tube installed in the vaporization tube 27, 32 is a fuel supply pipe for supplying fuel to this, and the thermostat as the temperature control switch 5 in the embodiment shown in FIG. Outer cylinder 2
Installed on 5.

In the above embodiment, the heated object is an evaporative oil stove in which indoor air is used as the heated object. However, the heated object may be water in an instantaneous water heater, for example.

That is, in order to keep the hot water temperature constant in the instant water heater, the burner 1 is opened and closed by a combustion control circuit equipped with a temperature switch that extinguishes the burner at the upper limit of the hot water outlet temperature and restarts combustion at the lower limit temperature. In this case, if the amount of hot water discharged is small, the temperature of the discharged hot water will immediately reach the upper limit temperature, and then when re-combustion occurs, the same problem as described above will occur.

Therefore, if the control circuit for the combustor is configured as shown in FIGS. 1 to 3, this problem can be similarly solved.

In this way, according to the present invention, a switch 6 is inserted in parallel with the temperature control circuit 5, which opens after the lapse of time when the temperature of the combustor 3 reaches a predetermined temperature or higher. is burner 1
Even when working on the extinguishing side, the switch 6 can maintain the state in which the combustion of the burner 1 is supported until the temperature of the combustor 3 reaches a predetermined temperature or higher, thereby eliminating the disadvantages seen in the conventional example. be.

[Brief explanation of drawings]

Figure 1 is an electrical circuit diagram of one example of implementing the present invention, Figure 2
Figure 3 and Figure 3 are electric circuit diagrams of other embodiments;
The figure is a cut-away side view of an example implementation of a vaporizing oil combustor. 1... burner, 2... vaporizer, 3... combustor,
4... Combustion control circuit, 5... Temperature control circuit, 6...
...Switch.

Claims (1)

[Scope of utility model registration request] The vaporizing cylinder 2 is heated by the combustion heat in the burner 1,
A type in which a combustion control circuit 4 of a combustor 3 that vaporizes liquid fuel, gasifies it, and then burns it is provided with a temperature control switch 5 that extinguishes the burner 1 at the upper limit temperature of the heated object and restarts combustion at the lower limit temperature. In this case, a switch 6 is provided in parallel with the temperature control switch 5, which opens after the combustor 3 reaches a predetermined temperature or higher.
Combustion control circuit in a vaporizing oil combustor that involves the intervention of