JP2002243140A - Petroleum combustion equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a filtering effectiveness to purify a petroleum fuel while suppressing a suction of an air to a fuel supply tank via a filter. SOLUTION: A petroleum fuel combustion equipment comprises an oil tank 3 for storing the petroleum fuel 1, a fuel supply pump 5 for pumping the fuel 1 in the tank 3 to supply the fuel to a burner 8, a suction joint 5a provided at the pump 5 and having a suction port 5B at its lower end, a first cylindrical filter 60 with a bottom having a suction opening 60C mounted at a distal end of the joint 5A so as to cover the suction opening 60C covered at a peripheral surface with a first filter net 60A, and a second filter 6 with a bottom having a suction opening 6C mounted at a lower end of the joint 5A so as to cover the first filter 60 and covered at a peripheral surface with a second filter net 6A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil combustion device used for an oil fan heater or the like, for vaporizing and burning oil fuel such as kerosene, and more particularly to an oil supply pump with a filter for supplying oil fuel to a burner.

[0002]

2. Description of the Related Art Conventionally, this type of petroleum combustion apparatus has been disclosed in, for example, Japanese Patent Application Laid-Open Nos.
No. 458, etc., and as shown in FIG.
An oil supply pump 5 is provided in the oil receiving tank 3 and pumps up the oil fuel 1 such as kerosene stored in the oil receiving tank 3 and supplies the oil fuel 1 to the vaporizing burner. A suction port 5B for sucking the petroleum fuel 1 is provided at a lower end of the suction joint 5A. The suction port 5B is provided on an extension of the pumping channel X, and its position is substantially the same as the abnormal oil level U1 described later. Then, a filter 6 is attached so as to cover the suction port 5B.

[0003] The filter 6 sucks dust and dirt mixed in the petroleum fuel 1 from the suction port 5B into the refueling pump 5, and the refueling pump 5 is locked or connected to the refueling pump 5. In order to prevent clogging of the oil supply pipe 7 and adversely affect the burner combustion,
It removes dust and dirt.

Reference numeral 4 in FIG. 5 has a detecting portion 4A at the lower end, and detects whether the oil level in the oil receiving tank 3 has dropped below a predetermined level. Oil sensor, arrow W indicates air flow, U indicates a steady oil level in the oil receiving tank 3 in a steady state, and U1 indicates an oil level in the oil receiving tank 3 in an abnormal case due to a failure of the oil sensor 4 or the like. Shows the oil level at abnormal time.

[0005]

By the way, in the above-described conventional structure, as shown in FIG.
Fails, even if the oil level in the oil receiving tank 3 drops to the abnormal oil level U1, which is lower than the position of the detection unit 4A of the oil amount sensor 4, the oil pump 5 does not stop and the oil fuel is supplied. Continue to pump.

In such an abnormal state, the air in the oil receiving tank 3 is sucked into the suction joint 5A through the upper part of the filter 6 and the suction port 5B as shown by an arrow W, and the sucked air is drawn. As a result, the burner is instantaneously supplied with more oil than normal. With such an instantaneous increase in fuel supply, the burner burner (for example,
A burn-up phenomenon (phenomenon in which the flame extends abnormally long) occurs in the burner head, and the tip of a long flame generated by the burn-up phenomenon is, for example, an open combustion type hot air heater such as an oil fan heater. In such a case, there is a fear that the gas leaks out of the device through the hot air outlet.

The present invention has been made in view of the above-mentioned circumstances, and is intended to improve the filtering efficiency for purifying petroleum fuel while suppressing air from being sucked into a refueling pump through a filter. It is intended to be.

[0008]

According to the first aspect of the present invention, there is provided an oil tank storing petroleum fuel, and pumping up the petroleum fuel in the oil tank to supply it to a burner. A refueling pump, a suction joint provided on the refueling pump, having a suction port at a lower end thereof, and a suction filter mounted on a lower end portion of the suction joint so as to cover the suction port of the suction joint. A bottomed cylindrical first filter having a covered suction opening, and a suction opening attached to the lower end of the suction joint so as to cover the first filter and having a peripheral surface covered with a second filter net; A second filter having a bottomed cylindrical shape.

According to a second aspect of the present invention, in the petroleum combustion apparatus according to the first aspect, the first filter net has a finer mesh than that of the second filter net.

According to a third aspect of the present invention, in the petroleum combustion apparatus according to the first or second aspect, the first filter network has a mesh of about 300 to 350 mesh. I do.

According to a fourth aspect of the present invention, in the petroleum combustion apparatus according to the first or second aspect, the second filter net has a mesh of about 200 to 300 mesh. I do.

According to the present invention described in claim 5, according to claim 1,
5. The oil-fired apparatus according to claim 2, wherein the second filter net has a substantial area of about 100 to 200 mm ^2.
Is set to.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an overall schematic configuration diagram of an oil-fired apparatus showing one embodiment of the present invention, FIG. 2 is an enlarged view of a main part of a partially cut-away view, and FIG. 4 is an enlarged view of a main part of FIG.

In FIG. 1 to FIG. 4, A is an oil-fired device, and this oil-fired device A has a burner B and a fuel supply section C.
It is composed of

Next, the fuel supply section C will be described.
1 is a petroleum fuel such as kerosene, 2 is a removable cartridge type refueling tank for storing the petroleum fuel 1, 3 is an oil receiving tank (oil tank) for replenishing the petroleum fuel 1 from the refueling tank 2, The oil receiving tank 3 contains the oil tank 2
The oil level is kept at the steady state level U in the steady state when the petroleum fuel 1 exists in the inside.

Reference numeral 4 denotes an oil amount sensor which outputs a detection signal when it detects that the oil fuel 1 in the oil receiving tank 2 has become lower than the detection reference level U0. A detection portion 4A is formed at the lower end, and is integrated with an electromagnetic pump 5 (oil supply pump) attached to the oil receiving tank 3.

The electromagnetic pump 5 has a hollow cylindrical suction joint 5A having a pumping passage X inside, and a suction port 5B serving as an inlet of the pumping passage X is opened at a lower end of the suction joint 5A. Have been. Further, the suction port 5B is located below the detection reference level U0 of the oil amount sensor 4, and pumps up the petroleum fuel 1 in the oil receiving tank 3 via the suction joint 5A. The fuel 1 is passed through an oil feed pipe 7 to be described later, and a carburetor 8 of a burner B described later.
Supply to

Reference numeral 60 denotes a first filter mounted so as to cover the lower end of the suction joint 5A. The first filter 60 has a bottomed cylindrical first shape having a plurality of suction openings 60C on its peripheral surface. The first filter main body 60 is formed so as to cover the filter main body 601 and the plurality of suction openings 60C.
The first filter net 60A is formed integrally with the first filter net 60A.

Reference numeral 6 denotes a second filter mounted on the lower end of the suction joint 5A so as to cover the outside of the first filter 60 further.
The second filter 6 has a bottomed cylindrical second filter body 61 having a plurality of suction openings 6C on its peripheral surface, and is integrated with the second filter body 61 so as to cover the plurality of suction openings 6C. And a second filter net 6A molded into the second filter net 6A.

Reference numeral 7 denotes the above-mentioned oil feed pipe connected to the discharge side of the electromagnetic pump 5, and a nozzle portion 9 attached to the tip of the oil feed pipe 7 has a jet port 9A at the tip of the oil feed pipe 9A. 8 facing the vaporization chamber 8A.

Next, the burner B will be described.
Reference numeral 8 denotes a bottomed cylindrical vaporizer for vaporizing the petroleum fuel 1, 10 denotes a burner case covering the outer periphery of the vaporizer 8, and 11 denotes a heavenly cylindrical cylinder provided to cover the upper opening of the vaporizer 8. The burner head 11 has a plurality of flame holes 12 on a peripheral wall of the burner head 11 for ejecting a mixed gas of a vaporized gas sent from a vaporizer 8 and combustion primary air.

Reference numeral 13 denotes a spark plug provided on the outer periphery of the burner head 11, reference numeral 14 denotes a frame rod for detecting the presence or absence of a flame F formed on the burner head 11, and reference numeral 15 denotes a mixing promotion provided inside the burner head 11. A cylinder 16 is a diaphragm plate fitted and mounted on the upper end opening of the vaporizer 8, and 17 is a burner ring arranged on the outer peripheral portion of the burner head 11.

The vaporizer 8 is made of aluminum die-cast, and a primary air supply port 19 opened in the burner case 10 is formed on a peripheral wall of the vaporizer 8, and the primary air supply port 19 is formed through the primary air supply port 19. The ejection port 9A of the part 9 faces the vaporization chamber 8A. Reference numeral 20 denotes a heater for heating the vaporizer 8, such as a sheath heater. The heater 20 is buried in the upper part of the peripheral wall of the vaporizer 8. Reference numeral 21 denotes a temperature detector for detecting the temperature of the vaporizer 8.

Reference numeral 23 denotes a combustion blower. The combustion blower 23 includes a fan case 23A and a fan case 2A.
3A, a combustion fan 23B and a combustion fan 23B.
And a motor 23C for rotating B, and supplies the room air sucked from the air suction port 22 of the fan case 23A to the inside of the burner case 10 as combustion air, and through the primary air supply port 19 The air is supplied to the vaporizing chamber 8A of the vaporizer 8 as primary air.

Next, the suction joint 5A will be described in detail. The suction joint 5A is formed of a synthetic resin, and has a hollow cylindrical shape with an internal pumping channel X. A suction port 5B serving as an inlet for sucking the petroleum fuel 1 is provided at the tip of the suction joint 5A.

The first filter 60 has a first filter network 60A having a mesh of about 300 to 350 mesh, and the second filter 6 has a second filter network 6A having a mesh of about 200 to 300 mesh. In the first filter network 60A, the mesh thereof is set finer than the mesh of the second filter network 6A.

Further, the second filter net has a substantial area set to about 100 to 200 mm ² .
The second filter net 6A corresponds to the suction opening 6C.

In the embodiment configured as described above,
When the oil fuel 1 in the oil receiving tank 3 is maintained at the steady oil level U, the oil amount sensor 4 detects that the oil fuel 1 in the oil receiving tank 3 is present in a predetermined amount or more. The detection signal is output.

When an operation switch (not shown) is turned on, the heater 20 is first energized, and the temperature detector 21 detects a temperature required for vaporizing the petroleum fuel 1, for example, 220 to 260 ° C. Until it is preheated. When the preheating of the carburetor 8 is completed, the combustion blower 23 is driven to draw the room air from the air inlet 22 into the fan case 23A as the combustion air, and the combustion air sucked into the fan case 23A. The air is sent into the internal space of the burner case 10 and the primary air supply port 19
Is supplied to the vaporization chamber 8A as primary air.

On the other hand, when the electromagnetic pump 5 is driven almost simultaneously with the start of driving of the combustion blower 23, the electromagnetic pump 5
, The oil fuel 1 in the oil receiving tank 3 passes through the filter network 6A of the filter 6, and is pumped up through the suction joint 5A. Thus, the petroleum fuel 1 pumped by the electromagnetic pump 5 passes through the oil supply pipe 7 and the nozzle 9
Is ejected from the gas outlet 9A into the vaporizing chamber 8A of the vaporizer 8, and is vaporized in the vaporizing chamber 8A to become a vaporized gas. This vaporized gas is premixed with the primary air in the vaporizing chamber 8A to become a mixed gas. When the mixed gas passes through the throttle plate 16, the concentration distribution of the vaporized gas becomes substantially uniform and is sent into the mixing promoting cylinder 15. Then, the gas passes through a number of through holes (not shown) provided in the mixing promoting cylinder 15 and is ejected from each of the flame holes 12 of the burner head 11.

The mixed gas ejected from each of the flame holes 12 of the burner head 11 is ignited by the spark discharge of the ignition plug 13 to form a flame F and start combustion. After the start of combustion, the heat from the flame F is recovered by the vaporizer 8 by the burner ring 17 and the like, and the vaporizer 8 is heated, so that the power supply to the heating heater 20 is stopped. Combustion is continued while the temperature is maintained at the allowable temperature.

Next, the oil fuel 1 in the refueling tank 2 runs out, the oil level in the oil receiving tank 3 decreases, and the oil level becomes lower than the detection reference level U0 of the oil amount sensor 4. Then, the oil amount sensor 4 detects the oil fuel 1
Is detected, the detection signal is output, and burner B
Is stopped.

Normally, the above-described combustion operation is performed. In such a combustion operation, the oil level in the oil receiving tank 3 does not decrease to the suction port 5B of the suction joint 5A. Does not breathe air.

However, if the oil amount sensor 4 fails due to some cause or the like and becomes abnormal, the pumping operation of the petroleum fuel 1 is continued without stopping the electromagnetic pump 5, and as a result, the oil level becomes lower. The oil level becomes lower than the detection reference level U0 and becomes the abnormal oil level U1.

In such a case, in this embodiment, the bottom end of the suction joint 5A has a suction opening 60C whose peripheral surface is covered with a first filter mesh 60A. Is mounted so as to cover the first filter 60, and the peripheral surface thereof has a second filter net 6 </ b> A.
And a second filter 6 having a cylindrical shape with a bottom and having a suction opening 6C covered with a filter, and the mesh of the first filter mesh 60A is smaller than the mesh of the second filter mesh 6A. Even if the oil level in the oil receiving tank 3 becomes lower than the detection reference level U0 due to a failure of the air conditioner or the like, the air in the oil receiving tank 3 directly passes through the suction port 5B and enters the suction joint 5A as in the related art. Therefore, a situation in which a larger amount of the petroleum fuel 1 is supplied to the carburetor 8 instantaneously than normal is suppressed beforehand, and the flame-starting phenomena in the burner head 11 (the flame is abnormal) When used in an open combustion type hot air heater such as an oil fan heater, part of the flame due to the standing flame phenomenon leaks out of the equipment through the hot air outlet. Safety so that there is no It can be coercive.

Since the first filter mesh 60A has a mesh of about 300 to 350 mesh, the air in the oil receiving tank 2 is supplied to the electromagnetic pump 5 through the second filter 6 and the first filter 60. In addition, the filtration efficiency for purifying the petroleum fuel 1 is improved.

Since the second filter net 6A has a substantial area set to about 100 to 200 mm ² ,
Suppressing the clogging of the second filter 6 for a long time,
The pumping efficiency of the electromagnetic pump 5 can be prevented from lowering.

Since the second filter network 6A has a mesh of about 200 to 300 mesh, it is possible to reliably remove dust in the petroleum fuel 1, and the electromagnetic pump 5 causes a lock phenomenon. And clogging of the oil feed pipe 7 and the nozzle portion 9 can be prevented.

Although the present invention has been described based on one embodiment, the present invention is not limited to this.

[0040]

As is apparent from the above description, the present invention provides an oil tank for storing petroleum fuel, an oil supply pump for pumping up the oil fuel in the oil tank and supplying it to the burner, and an oil supply pump for the oil supply pump. A suction joint having a suction port at its lower end, and a suction opening mounted on the lower end of the suction joint so as to cover the suction port of the suction joint and having a peripheral surface covered with a first filter net. A bottomed cylindrical first filter, and a bottomed cylindrical second filter mounted on the lower end of the suction joint so as to cover the first filter and having a suction opening whose peripheral surface is covered with a second filter net With this configuration, it is possible to prevent a situation in which a larger amount of petroleum fuel is instantaneously supplied to the burner than before, preventing the flaming phenomena in the combustion section, and using a petroleum fan heater, etc. Open combustion of When used in hot air heaters, it is possible to ensure safety so that part of the flame does not leak out of the device through the hot air outlet, and to refuel the pump through both filters. Can be suppressed, and the filtration efficiency for purifying petroleum fuel is improved.

[Brief description of the drawings]

FIG. 1 is an overall schematic configuration diagram of an oil combustion apparatus showing one embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of a partially cut-out.

FIG. 3 is an explanatory diagram illustrating a state where the filter is removed from a suction joint.

FIG. 4 is an enlarged view of a main part of FIG. 3;

FIG. 5 is an explanatory diagram illustrating a conventional example.

[Explanation of symbols]

 Reference Signs List A oil combustion device B burner C fuel supply unit 1 oil fuel 3 oil receiving tank (oil tank) 4 oil amount sensor 5 electromagnetic pump (oil supply pump) 5A suction joint 5B suction port 6 second filter 6A second filter net 6C suction opening 61 second filter main body 60 first filter 60A first filter net 60C suction opening 601 first filter main body 8 burner

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) F04B 21/06 B (72) Inventor Hideo Okada 1 Otsukicho, Ashikaga-shi, Tochigi Sanyo Electric Air Conditioning Co., Ltd. (72) Inventor Yoichi Uchida 1 Otsuki-cho, Ashikaga, Tochigi Sanyo Electric Air Conditioning Co., Ltd. F-term (reference) 3H071 AA07 CC41 DD32 DD62 DD72 3K068 AA15 CA16 CB03 EA02 EA06 4D064 AA23 BM32

Claims (5)

[Claims] 1. An oil tank for storing petroleum fuel, an oil supply pump for pumping the oil fuel in the oil tank and supplying the oil fuel to a burner, a suction joint provided in the oil supply pump and having a suction port at a lower end thereof. Is attached to the lower end of the suction joint so as to cover the suction port of the suction joint, and the peripheral surface of the suction joint is the first.
A first filter having a bottomed cylindrical shape having a suction opening covered with a filter net, and a suction filter mounted on a lower end portion of the suction joint so as to cover the first filter and having a peripheral surface portion covered with a second filter net; An oil-fired apparatus comprising: a bottomed cylindrical second filter having an opening. 2. The oil-fired apparatus according to claim 1, wherein the mesh of the first filter net is finer than the mesh of the second filter net. 3. The petroleum combustion apparatus according to claim 1, wherein the first filter net has a mesh of about 300 to 350 mesh. 4. The petroleum combustion apparatus according to claim 1, wherein the second filter net has a mesh of about 200 to 300 mesh. 5. The petroleum combustion apparatus according to claim 1, wherein the second filter net has a substantial area set to about 100 to 200 mm ² .