JPH0128854B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to combustion appliances such as oil fan heaters.

Configuration of conventional examples and their problems Conventional combustion appliances, such as oil fan heaters,
As shown in FIG. 1, a movable oil tank 2, a fixed oil tank 3, a burner unit 4, an operation/display section 5, a blower motor 6 and a fan 7, and a control device 8 are provided inside an exterior 1. It is composed of

In operation, kerosene is stored in the movable tank 2, and the base part 9 is connected to the fuel filler port 1 of the fixed tank 3.
0 to maintain a constant oil level in the fixed tank 3. Normally, the suction port 12 of the oil supply pump 11 is installed deeper than this oil level, a certain amount of oil is supplied to the burner 4 for combustion, and the blower motor 6 and fan 7 on the back blow hot air to the front. I'm starting to send it. The fixed tank 3 is equipped with a float switch 13 that detects the oil level. It detects whether the oil level is above a certain level and outputs a signal when the level is below a certain level. is transmitted to the control device 8, notified by the display lamp 14, and within a certain period of time from that point, for example.
Burner unit 4 stopped burning within 10 to 20 minutes. In addition, the control device 8 and the operation panel 5 include a button 15 and a time display 16.
It has the function of setting the current time, setting the timer time, and displaying these functions, and oil fan heaters mainly have a built-in timer (good morning timer) that starts operation when you wake up in the morning. This timer sets the operating time for burning the burner unit 4 to about 1 hour, and is configured so that if you wish to continue using it before the timer time expires, you can cancel the timer and switch to continuous operation. It's summery. In other words, in the case of oil fan heaters, it is necessary to avoid stopping combustion as much as possible due to the smell.

Further, the suction port 12 of the oil supply pump 11 is located below the oil level at which the float switch 13 detects OFF. This is because when the oil in the fixed tank 3 decreases, if the oil supply pump 11 runs dry, it will have a negative effect on the pump, and the oil supply by the pump will not be constant, so the combustion system in the burner unit 4 will also need to be balanced. This is to fill the chamber with unburned gas and cause extreme discomfort, and the float switch 13 always informs the control device 8 of the decrease in the oil level in advance to smoothly stop combustion. .

In such a control system, it is assumed that the float switch 13 stops combustion 10 minutes after detecting a decrease in the oil level. On the other hand, the good morning timer is set to operate tomorrow morning, but even if there is only enough oil for 12 minutes at the time the timer is set, the float switch 13 does not display anything because there is a 2 minute margin. Therefore, if you set the timer as is, it will only run for 12 minutes tomorrow morning, and combustion will stop before the room gets warmed up.

In this way, if the refueling prediction is extremely less than the operating time (for example, 1 hour) by the timer, the effect of the timer will not be demonstrated at all, and there will be a problem that the room will not be warm when you wake up. . In addition, the prediction of refueling is slow and the time required to continue combustion after knowing the need for refueling is short, so even if you are about to go to bed, you have to take the movable tank 2 outside to refuel, making it inconvenient to use. There was also this problem.

OBJECT OF THE INVENTION The present invention was made in view of the above-mentioned problems, and an object of the present invention is to ensure that a good morning timer functions properly and to be easy to use.

Structure of the Invention In order to achieve the above object, the present invention sets the time from detecting the oil level to stopping combustion and the timer time of the good morning timer to be almost the same.

DESCRIPTION OF EMBODIMENTS The embodiment will be described below with reference to FIGS. 2 and 3. This figure shows the relationship between the oil level and the installation of a float switch and oil supply pump shown as an example of the oil level detection element of the fixed tank 3. FIG. 2 shows a conventional example, in which a float switch 13 and an oil supply pump 11 are attached to the upper surface of a fixed tank 3. The height _A1 of the base 9 of the movable tank 2 is when oil is in both tanks, and at this time the float 17 of the float switch 13 is at the upper stopper 18.
Since it has reached the point where float switch 13 is
It is ON, and the control device 8 confirms that there is a lot of oil. Then, when the oil level gradually decreases and the float 17 drops to the oil level _B1 , the float switch 1
3 sends an OFF signal to the control device 8 to predict refueling, and automatically stops combustion in about 10 minutes from this point. Although the oil level at this time is _C1 , there is still some margin in the height _D1 of the suction port 12 of the pump 11.

Similarly, FIG. 3 shows the construction of an embodiment according to the invention, but the arrangement of parts is exactly the same as that in FIG. However, in this case, the capacity of the fixed tank 3a is increased. With this configuration, the steady and stable oil level at the oil filler port 10a of the fixed tank 3a is assumed to be _A2 . At this time, the float 17a of the float switch 13a is in contact with the top stopper 18a, which notifies the control device 8 that the switch is turned on. Next, the oil gradually decreases and the float switch 1
When the oil level B ₂ reaches where 3a issues an OFF signal, the fuel lamp 14 on the display board 15 lights up, and at the same time the control device 8 starts measuring time, and automatically stops combustion after one hour, for example. . This is made possible by changing the timer function for very common measurements from 10 minutes to 1 hour.
And on the fixed tank side, the refueling level after 1 hour is C ₂
is the level of the suction port 12a of the oil supply pump 11a
The capacity is increased so that it is higher than D ₂ , and the time is increased from 10 minutes to 1 hour, and the setting is made so that the fuel pump 11a will not run dry and cause a misfire at this point. be.

In this way, the amount of oil stored in the fixed tank is increased compared to the conventional product, and the time from when the float switch 13a is activated until the control device stops combustion is designed to be longer. If the control device 8 uses a microcomputer, it is easy to increase the time from 10 minutes to 1 hour, but if the fixed tank 3a
Since the amount of oil stored in the fan heater is large, it is necessary to devise measures to prevent a large amount of oil from leaking even if the fan heater falls over.

Note that the predicted refueling time from when the float switch 13a operates to when combustion is stopped may be set to be longer than the good morning timer time, but in order to reduce the amount of oil leakage in the event of a fall as much as possible, the operating time using the good morning timer may be set. It is best to leave it exactly the same (for example, 1 hour) or around this time.

Effects of the Invention As is clear from the above description of the embodiments, the present invention makes the time it takes for an oil level detection element such as a float switch to detect the oil level and stop combustion to be the same as the combustion continuation time determined by the timer. Therefore, if you set the good morning timer and turn on the heating, you can ensure that the good morning timer function is activated, and the heating will always be on when you wake up. In addition, the combustion after refueling prediction continues for a long time, for example, one hour, so even if the refueling display appears just before going to bed, you can continue to use it for a while, and you can refuel the tank whenever you like. It's also effective.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional combustion appliance, FIG. 2 is a sectional view of a fixed tank portion thereof, and FIG. 3 is a sectional view of a fixed tank portion in an embodiment of the present invention. 2, 3a...Tank, 4...Burner unit,
11a...Oil supply pump, 13a...Oil level detection element.

Claims (1)

[Claims] 1. A tank that stores fuel, a burner that burns the fuel, an oil level detection element that detects the oil level in the tank, and a control device that operates based on a signal from the oil level detection element and stops combustion after a certain period of time. and a timer function for starting and stopping the operation, and a time period during which the control device automatically stops combustion of the burner after the oil level detection element detects the oil level;
A combustion appliance in which the timer function starts and stops operating at approximately the same time.