JPS6344672Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a pot-type oil combustor with a quick start-up of combustion.

[Conventional technology]

A pot-type oil combustor sends a small flow of fuel to the pot with the ignition operation and ignites it with an ignition heater.If a large flow of fuel is sent immediately after ignition, fuel will accumulate in the pot and cause abnormal combustion. It was hot. For this reason, the combustion detector of a pot-type oil combustor detects combustion only after the temperature of the pot or combustion part becomes sufficiently high due to the heat of combustion.

[Problem that the invention attempts to solve]

In this way, pot-type oil combustors detect combustion only after the temperature of the pot and combustion part has become sufficiently high due to combustion heat, so in winter it is not uncommon for preheating combustion to take about 10 minutes, reducing preheating time. It is an important issue for pot-type oil combustors to achieve the set flow rate of the oil volume knob in a short time.

[Means for solving problems]

1 is a wind cylinder to which air is supplied by a blower 7;
Reference numeral 2 denotes a pot located within the wind barrel 1, and air supplied by the blower 7 flows into the pot 2 through an air hole formed in the side wall of the pot 2. 5 is a fuel supply pipe that supplies fuel controlled by the oil amount regulator 8 into the pot 2; 6 is a solenoid valve attached to the fuel supply pipe 5; Valve 6 is open and fuel is supplied to pot 2.
supply to.

Reference numeral 3 denotes a switching contact type combustion detector consisting of a thermostat, which detects a temperature rise due to combustion heat, performs combustion detection, and switches the contact. Reference numeral 4 denotes a pot bottom surface temperature detector installed near the pot 2, and the circuit becomes closed when the pot bottom surface is at high temperature.

The combustion detector 3 uses a switching contact type temperature switch, but this type is expensive, so when using an inexpensive open/close type combustion detector 3', the open/close type combustion detector 3' It is preferable to provide a series circuit with a relay 13 driven by the open/close type combustion detector 3', and configure the switching type combustion detector 3 by the contacts 3'' of the relay 13.

The non-combustion detection contact of the combustion detector 3 is directly connected to the solenoid valve 6.
The operation switch 11, the combustion undetected contact of the combustion detector 3, and the solenoid valve 6 form a series circuit. On the other hand, the combustion detection contact of the combustion detector 3 is connected to the solenoid valve 6 via the pot bottom temperature detector 4, and the combustion detection operation switch 11, the combustion detection contact of the combustion detector 3, and the pot bottom temperature detector 4 are connected to each other.
and the solenoid valve 6 form a series circuit. As a result, the solenoid valve 6 is opened when the operation switch 11 is closed and combustion is not detected, and when the operation switch 11 is closed and combustion is detected and the temperature sensor 4 on the bottom of the pot is closed.
is when a high temperature is detected, and conversely, the electromagnetic valve 6 is closed when the operation switch 11 is open and when combustion is detected and the bottom surface temperature of the pot is low. After the ignition operation to close the operation switch 11, the solenoid valve 6 becomes open when combustion is not detected and the pot 2 is closed.
On the other hand, after combustion is detected, if the bottom of pot 2 is high temperature, fuel is continuously supplied to pot 2, and if the bottom of pot 2 is low, solenoid valve 6 is activated.
combustion continues with the door closed.

12 is an ignition heater, 9 is an oil volume knob attached to the oil volume regulator 8, 10 is a solenoid that operates the flow rate switching pin of the oil volume regulator 8, and the operation switch 11 is interlocked with the oil volume knob 9. Then, the flow rate is changed from the small flow rate when the solenoid 10 suction is ignited to the set flow rate of the oil amount knob 9. In addition to the solenoid 10 that operates the flow rate switching pin of the oil amount regulator 8 as in the embodiment, a flow rate switching type electromagnetic valve may be used.

[Explanation of action]

In the control circuit of the embodiment, when the oil volume knob 9 is turned to open the oil volume regulator 8 and the operation switch 11 is closed, the open/close type combustion detector 3' is in a state where combustion is not detected, and the combustion detector 3' is not detected. The relay 13 connected in series with the combustion detector 3' is not energized, but the series circuit of the operating switch 11, the contact 3 of the relay 13, and the blower 7 is energized. In addition, one relay contact 3'', which functions as a switching type combustion detector 3, is conductive on the non-combustion detected side, energizing the series circuit of the operation switch 11, the relay contact 3'', and the ignition heater 12, and at the same time turning off the operation switch. 11, the relay contact 3'', the diode 14, and the DC circuit of the DC type electromagnetic valve 6. Therefore, the pot 2 receives fuel and combustion air, and the ignition heater 12 starts ignition combustion.

When the open/close type combustion detector 3' detects combustion, the DC circuit of the open/close type combustion detector 3' and the relay 13 is energized, and the relay contact 3 of the activated relay 13 is switched to switch the circuit of the blower 7. Connect directly to the power source and continue operation. On the other hand, the relay contact 3'', which functions as the combustion detection switch 3, switches to shut off the DC type electromagnetic valve 6 and the ignition heater 12, and also detects the operating switch 11, the relay contact 3'', the diode 15, and the bottom surface temperature of the pot. The series circuit of the detector 4 and the DC type solenoid valve 6 is energized, and the series circuit of the operation switch 11, the relay contact 3'', the diode 15, and the DC type solenoid 10 that switches the flow rate is energized. By energizing 10, the pushing action of the flow rate switching pin of the oil amount regulator 8 is stopped, the fuel flow rate set by the oil amount knob 9 is sent to the pot 2, and preheating combustion is completed.

Furthermore, the extinguishing operation can be carried out by turning the oil amount knob 9 in the reverse direction to close the oil amount regulator 8. Since the operation switch 11 is opened by the oil amount knob 9, the solenoid valve 6 and the solenoid valve 6, which are normally energized during combustion, are closed. Solenoid 10 is shut off and fuel supply is stopped. Pot 2 like this
When the fuel supply to the combustor is stopped, the combustor is extinguished and an open/close type combustion detector 3' consisting of a thermostat is switched. Therefore, the relay contacts 3'' and 3 are switched, and the relay contact 3 cuts off the blower 7, which is energized, and the fire extinguishing operation is completed.

By the way, in this device, in order to finish preheating combustion in a short time, the combustion detector 3 is switched early depending on the selection of the mounting position and the decrease in the set temperature, so that a large amount of combustion is detected before combustion is stabilized. Sometimes it becomes. In such a case, even if the pot 2 continues to burn, it will not be able to burn the entire amount of the supplied fuel, and the fuel will accumulate at the bottom of the pot 2, resulting in an incomplete combustion state. In this invention, the combustion detection contact of the combustion detector 3 is connected to the solenoid valve 6 via the pot bottom surface temperature detector 4, so when fuel starts to accumulate at the bottom of the pot 2, the solenoid valve 6 closes and the fuel in the pot 2 is closed. Discontinue supply.

If combustion continues with the fuel already sent into the pot 2, the bottom surface of the pot 2 changes from a wet state to a dry state, and the temperature of the bottom surface of the pot rises, causing the pot bottom surface temperature sensor 4 to close again, and the solenoid valve 6 opens and starts supplying fuel to pot 2. Therefore, on average, after combustion detector 3 switches, pot 2
The combustion can continue at the maximum combustible flow rate at that time, and the flow rate reaches the set flow rate of the oil amount knob 9 in a short time.

[Explanation of effects]

As described above, in this invention, even if the combustion detector 3 is switched at an early stage by using the combustion detector 3 that switches quickly, the pot bottom surface temperature detector 4 detects the condition of the pot 2 and the pot 2 is filled with more fuel than necessary. Since the fuel is no longer supplied, the time from the ignition operation to the setting combustion of the oil amount knob 9 can be greatly shortened without the combustion flame extinguishing or becoming too large.

Also, if there is some trouble at the maximum combustion rate and the supply of fuel exceeds the combustible amount due to some trouble, fuel will accumulate little by little in pot 2 and abnormal combustion will occur.
In this design, fuel is stored in pot 2, and
When a large amount of combustion heat is used to vaporize the fuel, the temperature at the bottom of the pot 2 decreases and the solenoid valve 6 closes, temporarily stopping the fuel supply, which automatically prevents abnormal combustion. It is.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an embodiment of this invention, and FIG. 2 is a diagram of an oil combustor in operation. 1...Wind barrel, 2...Pot, 3...Combustion detector, 3'...Open/close type combustion detector, 3''...Relay contact that functions as a combustion detector, 4...Pot bottom surface temperature detection 5...Fuel supply pipe, 6...Solenoid valve,
7...Blower, 11...Driving switch, 13...
relay.

Claims (1)

[Scope of claims for utility model registration] (1) A fuel supply pipe 5 is connected to a pot 2 located inside the wind barrel 1.
and connect the operation switch 11 to the fuel supply pipe 5.
At the same time, a solenoid valve 6 which is controlled by a solenoid valve 6 and opened when energized is installed, and a blower 7 is provided in communication with the wind cylinder 1.
In a pot type combustor that supplies air sent from the blower 7 into the pot 2 through an air hole drilled in the side wall of the pot 2 and burns fuel sent from the fuel supply pipe 5, the combustor has a pot 2. A switching contact type combustion detector 3 that operates when combustion is detected is provided, the combustion detector 3 and the operation switch 11 are connected in series, and the combustion non-detection contact of the combustion detector 3 is connected to the solenoid valve 6. A series circuit is formed between the operation switch 11, the non-combustion detected contact of the combustion detector 3, and the solenoid valve 6, and a pot bottom surface temperature detector 4 which maintains an open circuit at low temperatures is provided near the pot 2, The combustion detection contact of the combustion detector 3 is connected to the solenoid valve 6 via the pot bottom temperature detector 4, and the combustion detection contact of the combustion detector 3 and the pot bottom temperature detector are connected in parallel to the combustion non-detection contact of the combustion detector 3. 4
This pot-type oil combustion pot type oil combustion pot is characterized in that when combustion is not detected, the solenoid valve 6 is opened to allow fuel to flow, and when combustion is detected and low temperature is detected at the bottom of the pot, combustion continues with the solenoid valve 6 closed. vessel. (2) The pot-type oil combustor according to claim 1, wherein the switching contact type combustion detector 3 is constituted by an open/close type combustion detector 3' and a contact 3'' of a relay 13 connected in series.