JPH05296441A - Liquid fuel burning apparatus - Google Patents

Abstract

PURPOSE:To maintain safety without using a complicated safety controller by reducing power consumption of a pump while reducing a cost in a liquid fuel burning apparatus in which oil of one oil tray is transferred to the other oil tray. CONSTITUTION:The liquid fuel burning apparatus comprises a first oil tray 35 for storing oil to be supplied to a burning part 32 of a burner, etc., a first oil tank 36 for supplying oil to the tray 35, a second oil tray 37, and a second oil tank 38 for supplying oil to the tray 37. The oil of the tray 37 is transferred to the tray 35 through a pump 41 and an oil feed tube 42. The pump 41 is composed of a pump having no check valve. The tube 42 is raised at one end 42A coupled to the pump 41 above the pump 41, disposed at the other end 42C in the tray 35 to be dipped in steady oil level of the tray 35, and located at an intermediate part 42B lower than a position corresponding to the steady level of the tray 35.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion apparatus such as an oil fan heater and an oil stove, and more particularly to a liquid fuel combustion apparatus having a plurality of refueling tanks.

[0002]

2. Description of the Related Art A conventional liquid fuel combustion apparatus of this type has an outer case 1 having a hot air discharge port (not shown) on the front surface, as shown in FIG. The burner fan 2, an evaporative burner 3 to which combustion air is supplied from the burner fan 2, an upper open combustion cylinder 4 connected to the burner 3, and a blower guide device 5 facing the combustion cylinder 4. And a warm air blower fan (not shown) for feeding warm air to the blower guide device 5 are provided in the central portion,
Further, on both sides of these, the right oil pan 6 and the right oil tank 7 are provided.
And a left oil pan 8 and a left oil tank 9.

An electromagnetic pump 11 for supplying the oil (kerosene) from the right oil pan 6 to the burner 3 via the fuel supply pipe 10 is installed in the right oil pan 6, while the left oil pan 8 is equipped with this electromagnetic pump 11. An electromagnetic pump 13 is provided for transferring the oil in the left oil pan 8 to the right oil pan 6 via the oil feed pipe 12. Further, the right oil pan 6 and the left oil pan 8 are provided with float switches 14 and 15, respectively.

As shown in FIG. 4, each of the above electromagnetic pumps 11 and 13 has a solenoid coil 16 that periodically repeats excitation and non-excitation, and an upper side having a discharge hole 17 disposed inside the solenoid coil 16. Lower pole piece 20 having pole piece 18 and suction hole 19, and both pole pieces 18, 2
And a suction valve 23 provided in the plunger 22.
And a check valve 25 that opens and closes the inner discharge hole 24 provided in the upper pole piece 18.

[0005]

In the above liquid fuel combustion apparatus, when the right oil tank 7 becomes empty and the oil in the right oil pan 6 decreases, the electromagnetic pump 13 installed in the left oil pan 8 is driven, The oil replenished from the left refueling tank 9 to the left oil pan 8 passes through the electromagnetic pump 13 and the oil feed pipe 12 to the right oil pan 6
Since the transferred oil is supplied to the burner 3 by the electromagnetic pump 11, the combustion can be continued until the two refueling tanks are sequentially emptied, and the refueling tank can be refueled as compared with one refueling tank. The frequency of operation is low and it is easy to use. However, the electromagnetic pump 1 described above
3 has a check valve 25 in addition to the intake valve 23, so that the structure is complicated, the number of parts is large, and the price is high.

Further, while the oil is being transferred from the left oil pan 8 to the right oil pan 6, the electromagnetic pump 13 has to be continuously driven, which consumes electric power and causes a high running cost. Instead, in order to prevent oil overflow from the right oil pan 6 due to the large amount of oil being sent from the electromagnetic pump 13, the electromagnetic pump 13 had to be controlled using a complicated safety control device.

The present invention has been made in view of the above circumstances, and in order to reduce the trouble of refueling, the oil in one oil receiving tray is transferred to the other oil receiving tray via the pump and the oil feeding pipe. In order to reduce costs by enabling the use of inexpensive pumps, the power consumption of the pumps can be reduced, and safety can be maintained without using a complicated safety control device. There is.

[0008]

According to the present invention, a combustion section such as a burner, a first oil receiving tray for storing oil supplied to the combustion section, and a first oil receiving section for supplying oil to the first oil receiving tray are provided. Of the second oil receiving tray, a second oil receiving tray, and a second oil receiving tank for replenishing the second oil receiving tray with oil, and the oil in the second oil receiving tray is supplied to the first oil receiving tank via a pump and an oil feed pipe. In a liquid fuel combustion apparatus adapted to transfer to an oil pan, the pump is composed of a pump without a check valve, and the oil feed pipe has one end connected to the pump raised above the pump and the other end. So that it faces the inside of the first oil pan and is immersed below the oil surface of the first oil pan, and the intermediate portion is located below the position corresponding to the steady oil level of the second oil pan. It is a certain structure.

[0009]

As described above, since the pump for transferring the oil in the second oil pan to the first oil pan is a pump without a check valve, a simplified and inexpensive pump can be used. It is possible to reduce the cost. In addition, the oil feed pipe has one end connected to the pump raised above the pump, the other end facing the first oil pan, and immersed under the steady oil level of the first oil pan. And the middle part is the second
By locating it below the steady oil level equivalent position of the oil pan, the siphon phenomenon occurs in the pump and the oil feed pipe, and even after the pump is stopped, the oil in the second oil pan is set to the first oil pan. It can be transferred to the oil pan, the time to energize the pump is greatly shortened, and the power consumption can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a petroleum fan heater will be described below with reference to the drawings of FIGS. In FIG. 1, reference numeral 30 denotes an exterior case having a hot air outlet (not shown) on the front surface thereof. A burner fan 31 is provided in the exterior case 30, and vaporization for supplying combustion air from the burner fan 31. Type burner 32, upper open combustion cylinder 33 connected to this burner 32, blower guide device 34 facing this combustion cylinder 33, and air intake port provided in the center of the back surface of exterior case 30 (see FIG. A hot air blower fan (not shown) that guides air flowing in from a not shown) to the blower guide device 34, mixes it with the combustion gas from the combustion tube 33 and discharges it from the hot air outlet is provided in the central portion. , The right oil pan 35 and the right oil tank 36 on the left and right sides of these.
And a left oil pan 37 and a left oil tank 38 are provided respectively.

An electromagnetic pump 40 for supplying fuel for supplying the oil of the right oil pan 35 to the burner 32 through a fuel supply pipe 39 is provided on the upper surface of the right oil pan 35, and
The right oil pan 35 and the left oil pan 37 are always open to the atmosphere, and the lower end of the pumping pipe 40A of the electromagnetic pump 40 faces the inner bottom of the right oil pan 35. The electromagnetic pump 40 for fuel supply is the same as that shown in the conventional example of FIG.

Reference numeral 41 denotes an oil transfer electromagnetic pump mounted on the upper surface of the left oil receiving tray 37, and the lower end of the pumping pipe 41A of the electromagnetic pump 41 is also exposed near the inner bottom of the left oil receiving tray 37. An oil feed pipe 42 formed by bending a hollow pipe is connected to an upper portion of the electromagnetic pump 41. The oil feed pipe 42 has a one end portion 42A connected to the oil transfer electromagnetic pump 41 higher than the electromagnetic pump 41. While standing up to the position, the intermediate portion 42B is set to a position lower than the position corresponding to the steady oil level L1 of the left oil tray 37 and extends substantially horizontally toward the right oil tray 35, and the other end portion 42C is connected to the one end portion 42.
After being raised to a position lower than A and higher than the right oil pan 35, it is exposed to the inside of the right oil pan 35 and constantly immersed below the oil surface of the right oil pan 35.

Further, the electromagnetic pump 41 for transferring the fuel.
As shown in FIG. 2, is a solenoid coil 43 that periodically repeats excitation and non-excitation, an upper pole piece 45 having a discharge hole 44 and a lower pole having a suction hole 46 arranged inside the solenoid coil 43. Piece 47 and these bipolar pieces 45, 4
7, a plunger 51 supported by an upper spring 49 and a lower spring 50 to slide in a cylinder 48 disposed in 7, and provided in the plunger 51 and weakened to the lower passage 53 side of the plunger by an inner spring 52. The suction valve 54 is energized. The discharge hole 44 communicates with the one end portion 42A side of the oil feeding pipe 42, and the suction hole 46 communicates with the pumping pipe 41A.

Reference numeral 55 denotes a right float switch provided on the right oil pan 35. When the oil surface of the right oil pan 35 is lowered to a predetermined oil level L3 lower than the steady oil level L2, the right float switch 55 is provided. Detecting this, a control device (not shown) composed of a microcomputer or the like is operated and the electromagnetic pump 41 for oil transfer is operated for a predetermined time (for example, 30
It is driven for 60 seconds). 56 is the left oil pan 37
The left float switch 56 includes a left float switch 56, in which the oil level of the left oil pan 37 is the steady oil level L.
An alarm (not shown) such as a lamp or a buzzer that detects when the oil level drops below a predetermined oil level below 1 and notifies that the oil level has run out.
Is to operate.

In the above structure, when the operation is started,
When a vaporizer (not shown) heats a vaporizer (not shown) of the burner 32 and the vaporizer is sufficiently heated, the burner fan 31 and the electromagnetic pump 40 for supplying fuel are driven and an igniter ( (Not shown) is activated, and the burner 32 starts burning. At this time, the electromagnetic pump 40 pumps up the oil in the right oil pan 35 and supplies the oil to the carburetor of the burner 32 via the fuel supply pipe 39. Oil is being replenished.

The combustion gas of the burner 32 is a combustion cylinder 33.
It rises inside and flows out into the blower guide device 34, where it mixes with the air from a blower fan for warm air (not shown) to become warm air, and discharges it into the room from a warm air outlet (not shown). And then heating.

Now, when the oil in the right oil tank 36 is consumed and emptied, the oil level of the right oil pan 35 falls below the steady oil level L2, and the lowered oil level falls to the predetermined oil level L.
When 3 is reached, the oil level is lowered and the right float switch 5
5 detects and receives this detection signal, a control device (not shown) drives the electromagnetic pump 41 for oil transfer for a predetermined time.

By driving the electromagnetic pump 41, the left oil pan 3
The oil of No. 7 flows into the right oil pan 35 through the electromagnetic pump 41 and the oil feed pipe 42. Here, the electromagnetic pump 41 has about 30
It is energized only for a predetermined time of ~ 60 seconds,
1 and the passage in the oil feed pipe 42 are filled with oil, and the oil continues to flow in the electromagnetic pump 41 and the oil feed pipe 42 due to the siphon phenomenon. This oil stops flowing when the oil level of the right oil pan 35 reaches the same level as the oil level of the left oil pan 37, and the oil in the right oil pan 35 is consumed, and the oil in this right oil pan 35 is consumed. When the surface becomes lower than the oil level of the left oil pan 37, the flow starts again. Thus, the left refueling tank 38
The oil in the left oil receiving tray 37 can be transferred to the right oil receiving tray 35 by utilizing the siphon phenomenon that occurs in the electromagnetic pump 41 and the oil feed pipe 42 until is empty.

According to the present embodiment, an oil transfer electromagnetic pump 41 for transferring the oil in the left oil pan 37 to the right oil pan 35.
Has a structure without a check valve, as shown in FIG.
It is not necessary to provide components such as a check valve and a valve seat for a check valve, and the structure can be simplified and the price can be reduced accordingly, and the cost can be reduced.

Further, the oil feed pipe 42 raises one end portion 42A connected to the oil transfer electromagnetic pump 41 to a position higher than the electromagnetic pump 41, and the intermediate portion 42B at the steady oil level L1 of the left oil pan 37. The position is lower than the corresponding position and extends substantially horizontally toward the right oil pan 35, and the other end 42C is lower than the one end 42A and the right oil pan 3
After starting up higher than 5, since it is exposed to the right oil pan 35 and is constantly immersed below the oil surface of the right oil pan 35, a siphon phenomenon occurs in the electromagnetic pump 41 and the oil feed pipe 42, and the electromagnetic pump Even after the driving of 41 is stopped, the oil in the left oil pan 37 can be transferred to the right oil pan 35 by utilizing the siphon phenomenon, so that the energization time to the electromagnetic pump 41 can be extremely shortened and the power consumption of the electromagnetic pump 41 can be reduced. It can be significantly reduced.

Furthermore, since the oil in the left oil pan 37 is transferred to the right oil pan 35 by utilizing the siphon phenomenon occurring in the electromagnetic pump 41 and the oil supply pipe 42, a large amount of oil is fed from the electromagnetic pump 41 to the oil from the right oil pan 35. Does not need to be controlled, and there is no need to control the electromagnetic pump 41 using a complicated safety control device as in the conventional case.

Furthermore, the oil in the refueling tank 38 has one of the oils due to an increase in the internal pressure of the refueling tank 38 (for example, when the oil is left outdoors in a low temperature and left in a high temperature room). Even if the oil is excessively pushed out to the pan 37, the siphon phenomenon occurring in the electromagnetic pump 41 and the oil feed pipe 42 always causes the oil to flow to the other pan 35, so that only the oil surface of one pan 37 rises abnormally. Oil can be prevented from overflowing and safety is improved.

[0023]

As described above, according to the present invention, an inexpensive pump having a simplified structure can be used as a pump for transferring the oil in the second oil receiving tray to the first oil receiving tray, and the cost can be reduced. Of course, since the oil in the second oil pan can be transferred to the first oil pan by using the siphon phenomenon that occurs in the pump and the oil feed pipe, the time for energizing the pump is shortened and the power consumption of the pump is reduced. , Running cost is reduced. In addition, since the oil in the second oil pan can be transferred to the first oil pan by utilizing the siphon phenomenon, there is no risk of oil leakage due to a large amount of oil sent by the pump, and a structure for maintaining safety Can be simplified.

[Brief description of drawings]

FIG. 1 is an internal structure explanatory diagram of an oil fan heater showing an embodiment of a liquid fuel combustion apparatus according to the present invention.

FIG. 2 is a cross-sectional view showing an example of an electromagnetic pump for oil transfer.

FIG. 3 Conventional oil fan heater (liquid fuel combustion device)
It is an internal structure explanatory view showing an example.

FIG. 4 is a cross-sectional view showing a conventional oil transfer electromagnetic pump.

[Explanation of symbols]

 32 burner (combustion section) 35 right oil pan (first oil pan) 36 right oil tank (first oil tank) 37 left oil pan (second oil pan) 38 left oil tank (second oil tank) 41 Oil Transfer Electromagnetic Pump (Pump) 42 Oil Pipe 42A Oil Pipe One End 42B Oil Pipe Middle 42C Oil Pipe Other End

Claims (1)

[Claims] 1. A combustion section such as a burner, a first oil receiving tray for storing oil supplied to the combustion section, a first oil supply tank for supplying oil to the first oil receiving tray, and a second oil receiving tank. An oil receiving tray and a second oil supply tank for replenishing the second oil receiving tray with oil are provided, and the oil in the second oil receiving tray is fed through the pump and the oil feed pipe to the first
In the liquid fuel combustion apparatus adapted to be transferred to the oil pan, the pump is composed of a pump without a check valve, and the oil supply pipe has one end connected to the pump raised above the pump and the other end. The part is exposed to the inside of the first oil pan and immersed under the oil surface of the first oil pan, and the intermediate part is positioned below the steady oil level equivalent position of the second oil pan. A liquid fuel combustion device characterized by being provided.