JP2003130336A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion device that prevents noise in oil piping connecting an oil tank to an appliance body as a first problem and produces continuously stable combustion by preventing pulsating combustion as a second problem. SOLUTION: As a means for solving the first problem, in a structure where oil is pumped up by a lift pump 9 from the oil tank 7 to a sub tank 6 disposed in the appliance body 5 and is fed to a burner part 3, piping between the lift pump 9 and the oil tank 7 has in the middle a bellows type resilient accumulator 16 with a periphery placed in close contact with an inner piping surface to form a plurality of partitioned air layers, to thereby absorb vibration of oil efficiently and prevent noise. As a means for solving the second problem, piping between a nozzle 12 and an electromagnetic pump 10 has in the middle a bellows type resilient accumulator with a periphery placed in close contact with an inner piping surface to form a plurality of partitioned air layers, to thereby absorb vibration of oil efficiently, prevent pulsating combustion reliably and produce stable combustion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a combustor for pumping oil from an oil tank installed at a distant place with a pump to supply it to a burner section, and a structure for preventing vibration noise generated in the middle of piping, and The present invention relates to a combustion device in which oil in a sub tank is pressure-fed to a nozzle of a burner section by an electromagnetic pump, and prevents pulsating combustion.

[0002]

2. Description of the Related Art Conventionally, in this type, as disclosed in, for example, Japanese Unexamined Patent Publication (Kokai) No. 11-82995, an accumulator is provided midway between the pumping pump and the oil tank, and a metal pipe such as a copper pipe is provided. It was intended to prevent vibration noise on the way. On the other hand, for example, JP-A-8-42818
As disclosed in the publication, an accumulator is provided in the middle of piping between an electromagnetic pump for hydraulic transmission and a nozzle to obtain stable combustion.

[0003]

By the way, in the former conventional example, the accumulator is branched and installed in the middle of the pipe, so that the vibration of the oil in the pipe cannot be efficiently absorbed and the vibration noise is reduced. It was something that could not be reliably prevented.

Also in the latter conventional example, since the accumulator has a flat surface, it can absorb only pressure fluctuations in one direction, so that pressure fluctuations of oil cannot be efficiently prevented and a hole is formed at one location of the accumulator. When opened, there was a big problem that the space between the protective tube and the protective tube was filled with oil and the vibration absorbing action could not be performed.

[0005]

The present invention focuses on this point and solves the above-mentioned drawbacks. In particular, according to claim 1, a sub-tank provided in the main body of the apparatus is provided with a pump for pumping oil from the oil tank. In the case of pumping up and supplying to the burner part, in the middle of the piping of the pumping pump and the oil tank, the outer peripheral surface is in close contact with the inner surface of the piping and a plurality of partitioned air layers are formed to form a bellows tubular and elastic. It is equipped with an accumulator, and the vibration of the oil flowing in the bellows tubular accumulator can be absorbed from any direction at the bellows part, efficiently absorbing the vibration and reliably preventing vibration noise. It is something that can be done.

According to a second aspect of the present invention, an oil in a sub tank is pressure-fed by an electromagnetic pump to a nozzle of a burner portion provided in the main body of the appliance, and the oil is supplied between the nozzle and the electromagnetic pump. It is equipped with a bellows tubular elastic accumulator in which the outer peripheral surface is in close contact with the inner surface of the pipe to form a plurality of partitioned air layers, which allows fluctuations in the oil pressure generated by the pumping of the electromagnetic pump to occur in the accumulator. Since it is efficiently absorbed by the bellows part and is totally relaxed, pulsating combustion is prevented and stable combustion is always obtained.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment for claim 1 in which the combustion device according to the present invention is applied to a water heater will be described with reference to FIGS. Reference numeral 1 denotes a heat exchanger provided in the middle of the hot water supply passage 2, which is heated by the combustion of the burner portion 3 located below, and appropriately supplies hot water by opening the hot water supply plug 4 provided at the tip of the hot water supply passage 2. .

Reference numeral 5 denotes an instrument main body having the heat exchanger 1 and the burner portion 3 and the like built therein, which has a structure that can be installed on a wall of a house or the like. 6 is a capacity of about 300c provided in the instrument body 5
The sub tank c is supplied with oil from a large-capacity oil tank 7 installed outside the instrument body 5 and always stores a predetermined amount of oil.

Reference numeral 8 denotes an oil feed pipe which constitutes a pipe of a copper pipe connecting the sub tank 6 and the oil tank 7, and is provided with a pump 9 for pumping oil in the middle thereof. Reference numeral 10 denotes an electromagnetic pump that appropriately pressure-feeds the nozzle 12 so that the oil in the sub-tank 6 is sprayed to the vaporization portion 11 of the burner portion 3, and the supply amount is controlled according to the combustion amount.

Reference numeral 13 denotes an oil level detection means provided in the sub tank 6 for controlling the pumping pump 9 so as to keep the oil level in the sub tank 6 constant, and a magnet (inwardly moving up and down according to the oil level) 3 and a lead switch (not shown) which guides the vertical movement of the float 14 and which is turned on and off by the approach of a magnet inwardly.
It is composed of the main pillar 15 provided at the position, the pumping pump 9 is started to be driven at the lower “empty” position, the driving is stopped at the “full” position, and the entire driving is stopped at the “dangerous” position above this. Then, the abnormal oil level is detected.

An accumulator 16 is provided in the vicinity of the suction side of the pumping pump 9 in the middle of the oil supply pipe 8 from the oil tank 7 to the sub tank 6, and is formed of a bellows tubular elastic rubber material having elasticity. The bellows part 1 is inserted into the brass pipe part 17 connected in the middle of the oil supply pipe 8.
The outer peripheral surface of 8 is in close contact with the inner surface of the tube portion 17 to form a plurality of partitioned air layers 19 between the inner surface of the tube portion 17 and the inner surface. Reference numeral 20 is an electric control unit that controls the drive of each unit.

Next, the operation of the first embodiment will be described. If the pump 9 is driven to pump oil from the oil tank 7 to the sub tank 6, the oil is transferred to the sub tank 6 through the oil supply pipe 8. Although supplied, the vibration generated by the starting and stopping movement of the pumping pump 9 at this time is transmitted to the oil flowing through the oil feeding pipe 8, which causes resonance or resonance and causes noise.

However, in the present invention, since the accumulator 16 is provided in the oil supply pipe 8, as shown in FIG. 3, the elastic force of the accumulator 16 itself and the plurality of air layers 19 are provided. The vibration of the oil is absorbed by the shock absorber, and the middle bellows portion 18 can surely absorb the vibration from any direction, and the vibration of the oil can be efficiently absorbed to prevent the vibration noise. Is.

Next, a second embodiment for claim 2 will be described with reference to FIG.
5, the same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. 2 is a sectional view showing the same accumulator 16.

The difference from the first embodiment is that the accumulator 16 is attached at a position midway between the nozzle 12 and the supply pipe 21 of the electromagnetic pump 10 and near the discharge side of the electromagnetic pump 10. There is something.

Due to this difference, even if the vibration of the starting and stopping motion of the electromagnetic pump 10 for pumping the oil is transmitted to the oil to be supplied, this vibration is absorbed by the action of the accumulator 16 described in the first embodiment. And as shown in FIG.
Even if a hole is formed in a part of the mullet 16, only one air layer 19 is filled with oil, the other air layer 19 is maintained as it is, and the vibration absorbing effect is good even when the hole is opened. In this case, pulsating combustion, which often occurs in a low combustion state due to the propagation of vibration to oil, is prevented, and stable combustion is always obtained.

Further, since the accumulator 16 is made of a rubber material, it can be easily manufactured and can be provided at a low cost.
In addition, in this embodiment, the description has been made on the example implemented in the water heater,
Of course, the present invention is not limited to this, and may be applied to, for example, a petroleum air conditioner that heats a refrigerant with a petroleum burner for heating. Also here is the accumulation
Although the mounting positions of the actuators 16 have been described separately, one accumulator body 5 is provided with two accumulators 16, and the first embodiment is used.
And, if they are attached as in the second embodiment, their respective operational effects can be obtained at the same time.

[0018]

As described above, according to the invention of claim 1,
The vibration of the oil due to the pumping pump can be efficiently absorbed by the bellows tubular accumulator, and the noise between the oil tank and the pumping pump and the noise due to the resonance can be reliably prevented.

According to the second aspect of the present invention, the vibration of the oil generated by the pumping of the oil by the electromagnetic pump can be efficiently absorbed by the accumulator having the bellows tubular shape, especially at a low combustion amount. The pulsating combustion that frequently occurs is reliably prevented, and stable combustion is always obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a water heater showing a first embodiment of the present invention.

FIG. 2 is a sectional view of the same main part.

FIG. 3 is an enlarged sectional view of the relevant part.

FIG. 4 is a configuration diagram of a water heater showing a second embodiment of the present invention.

FIG. 5 is an enlarged cross-sectional view of the relevant part.

[Explanation of symbols]

3 burner section 5 Instrument body 6 sub tank 7 oil tank 8 Oil supply piping 9 Pumping pump 10 Electromagnetic pump 12 nozzles 16 Accumulator 17 Pipe 18 Bellows 19 Air layer

Claims (2)

[Claims] 1. A sub-tank provided in an instrument main body, wherein a pumping pump pumps oil from an oil tank and supplies the oil to a burner section. In the piping between the pumping pump and the oil tank, an outer peripheral surface is a pipe. A combustor characterized by comprising a bellows tubular and elastic accumulator that adheres to an inner surface and forms a plurality of partitioned air layers. 2. An apparatus for pumping oil in a sub-tank by an electromagnetic pump to a nozzle of a burner portion provided in a main body of an appliance and supplying the oil to the nozzle, the outer peripheral surface is provided in the middle of the piping of the nozzle and the electromagnetic pump. A combustor characterized by comprising a bellows tubular and elastic accumulator in which a plurality of partitioned air layers are formed in close contact with an inner surface of a pipe.