JPH0113237Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a combustion device, that is, a blower for supplying combustion air from a combustion fan to a combustion section, as disclosed in the prior art, for example, in Japanese Utility Model Application No. 56-85143. An adjustment hole is provided in the middle of the route,
The intensity of combustion can be varied by opening this adjustment hole only during weak combustion and discharging a part of the combustion air to the outside, or by changing the frequency of the combustion fan due to the difference in frequency caused by this adjustment hole. Things that try to absorb abilities are already known.

However, with this known method, when a part of the combustion air is discharged from the control hole, an unpleasant whistling sound is generated, which makes the user feel uneasy and also causes noise. It was something like that. This invention focuses on this point and aims to eliminate the above-mentioned drawbacks, eliminate unpleasant noise, and provide a combustion device that can be used comfortably at all times without giving the user a sense of anxiety, and achieves this purpose. In order to achieve this, in particular, the configuration is such that an adjustment hole is provided in the air blowing path that supplies combustion air from a combustion fan to the combustion section to discharge a part of this combustion air to the outside, and furthermore, an adjustment hole is provided outside the adjustment hole. The combustion device is equipped with a sound-muffling member that covers the hole, and an appropriate space is formed between the adjustment hole and the sound-muffling member. Since the sound is muffled by the member, there is no problem such as unpleasant noise that makes the user feel uneasy, and comfortable combustion can always be obtained. Since the space is formed, the adjustment hole and the sound deadening member are not in direct contact with each other, and the sound deadening member does not act as a resistance to the air being discharged, preventing smooth air discharge. Since the air discharged to the outside is once diffused through the space and then escapes to the outside through the sound deadening member, it is possible to always discharge the air smoothly, and while improving the sound deadening effect, there is no difference between conventional air discharge. This has the effect of eliminating the risk of causing problems.

Next, a preferred embodiment of the combustion apparatus according to the invention shown in the drawings will be described.

Reference numeral 1 denotes a combustion section consisting of a vaporization type combustion pot equipped with a heater (not shown) at the bottom, which mixes combustion air and vaporized gas at the inner lower part and forms a combustion flame at the upper end.

A combustion fan 2 supplies combustion air to the combustion section 1, and is provided at the other end of the ventilation path 3 whose one end is open to the combustion section 1.

The ventilation path 3 is divided by a dividing plate 4 into a small ventilation path 5 which is always in communication with the air and a large ventilation path 6 which is in communication only during strong combustion.
The communication is controlled by opening and closing a communication port 7 provided in a part of the dividing plate 4 by a valve body 10 integrated with a plunger 9 that is moved upward by a solenoid 8 that is energized only during strong combustion and performs a suction action. It is something.

Reference numeral 11 denotes a small diameter 2 which is opened in a recessed wall at one place on the side of the large air duct 6 in the air duct 3 and communicates with the outside.
During strong combustion, the valve body 10 opens the communication port 7, and the valve body 10 closes the communication port 7.It is closed only during weak combustion, and the valve body 10 closes the communication port 7. The capacity of the combustion fan 2 is always kept constant.

12 is a ventilation path 3 so as to cover the outside of the adjustment hole 11.
A sound deadening member made of sponge or the like is fixed to the outer circumferential wall with an adhesive or the like, and a space 13 is provided between it and the adjustment hole 11 by recessing the wall surface.

14 is a branch pipe 1 branched from the middle of the small air passage 5
A constant oil level device that is loaded with static pressure of air through 5.
The combustion fan 2 always stores a certain amount of fuel.
Fuel oil is supplied to the combustion section 1 via an oil feed pipe 16 according to the static pressure from the fuel oil.

Reference numeral 17 denotes a fine adjustment valve body for adjusting changes in air flow rate and pressure due to manufacturing errors in the combustion fan 2, air flow path 3, and the like.

18 is a donut-shaped control board, 60Hz
It is installed near the suction port of the combustion fan 2 in the air blowing path 3 only when in use, and further corrects changes in air blowing capacity due to differences in frequency.

Next, the operation will be explained.

If the combustion fan 2 is driven after the heating heater is energized to raise the temperature of the combustion section 1 to a certain temperature, combustion air will be supplied to the combustion section 1 via the ventilation path 3 and branched from the ventilation path 3. Fuel is supplied from the oil supply pipe 16 to the combustion section 1 according to the static pressure applied to the oil level regulator 14 via the branch pipe 15, and while this fuel is vaporized in the combustion section 1, it is mixed with combustion air. At this time, for example, if you want to achieve strong combustion, if you energize the solenoid 8 while the combustion fan 2 is still driven, the plunger 9 will move upward together with the valve body 10 and open the communication port 7. is opened, a large amount of combustion air is supplied to the combustion section 1 under high pressure via the large and small air passages 6 and 5, and a large amount of fuel is also supplied correspondingly to perform intense combustion. It is something.

Next, if you want to achieve weak combustion, just stop energizing the solenoid 8 in the above state, and the valve body 10 integrated with the plunger 9 will descend by its own weight or a spring, closing the communication port 7, thereby reducing combustion. Air is supplied only from the small air passage 5 and is throttled, reduced in volume and pressure, and then supplied to the combustion section 1 for weak combustion.At this time, at the same time as the communication port 7 of the valve body 10 is closed, the valve An adjustment hole 11 is opened by the body 10, and a part of the combustion air in the ventilation path 3 is discharged to the outside, and the combustion air during weak combustion is adjusted to a frequency of 50Hz to 60Hz.
This is to ensure that it is always kept almost constant even if there are changes such as Hz.

In other words, during strong combustion, the amount of combustion air and fuel are large, and the firepower is strong, so the frequency used changes from 50Hz to 60Hz, and the capacity of the combustion fan 2 changes, and the amount of combustion air increases somewhat compared to 50Hz, and the pressure increases greatly. Even if the combustion balance becomes slightly unbalanced, it will not have a major effect on combustion, but during weak combustion, where both the amount of combustion air and fuel are small and the firepower is weak, this frequency change will have a particularly large effect, so during strong combustion If the adjustment hole 11 is opened, the combustion will be less variable, but it is necessary to open the adjustment hole 11 at least during weak combustion, and by opening the adjustment hole 11, the operating frequency will be 50.60Hz A part of the combustion air is exhausted to the outside in either case, but as mentioned above, the combustion air is
At 60Hz, the amount of combustion air increases somewhat and the pressure becomes much stronger, so the amount of combustion air discharged to the outside from the adjustment hole 11 increases at 60Hz, and the amount of combustion air supplied to the combustion section 1 and The static pressure loaded on the oil level regulator 14 is almost the same as that at 50Hz, and even if the frequency changes, the change in combustion can be absorbed by the adjustment hole 11, and the combustion fan 2 can be changed by switching the switch tap like in the past. It eliminates the need for assembly work such as changing the capacity or modifying the ventilation route 3, making it extremely easy to assemble, allowing for mass production, and eliminating the need to add new parts due to frequency differences, resulting in inexpensive equipment. Furthermore, the same equipment can be used as is without any modification in areas with different frequencies, making it extremely convenient and easy to use when moving to a place with a different frequency. It is something.

Furthermore, since a sound deadening member 12 is provided outside the adjustment hole 11, the air discharged from the adjustment hole 11 flows through the sound deadening member 12, is muffled, and then is released to the outside. The whistle-like whistling sound that was emitted when a portion of the combustion air escaped from this adjustment hole 11 was reliably silenced.
To provide a combustion device that does not give a user a sense of anxiety and always performs quiet and comfortable combustion.

Furthermore, since a space 13 is formed between the adjustment hole 11 and the muffling member 12, the air discharged directly from the adjustment hole 11 to the muffler 12 does not enter, and the discharged air is always once inside the space. Since the air is diffused in the section 13 and then flows through the sound deadening member 12, the flow part of the sound deadening member 12 that discharges air is limited and narrow, preventing air from escaping properly and preventing the adjustment hole 11 from performing its original function. This is reliably prevented, and the discharged air is once diffused in the space 13 and discharged to the outside through a wide range of the entire sound deadening member 12, so that a part of the air can always be smoothly and favorably discharged.

In short, this idea connects the combustion fan 2 to the combustion section 1.
An adjustment hole 11 for discharging a part of this combustion air to the outside is provided in the middle of the ventilation path 3 that supplies combustion air, and a sound deadening member 12 is provided outside the adjustment hole 11 to cover the adjustment hole 11. , this adjustment hole 11
Since an appropriate space 13 is formed between the noise reduction member 12 and the noise reduction member 12, it is extremely easy to switch the intensity of combustion amount or absorb changes in combustion fan performance due to differences in frequency using the adjustment hole. Of course, the combustion air exhaust noise from the adjustment hole is always muffled by the sound-deadening member, so there is no problem that this exhaust noise becomes unpleasant and makes the user feel uneasy, unlike in the past. It can be used safely and comfortably, and since a space is formed between the adjustment hole and the sound-deadening member, the discharged air is prevented from flowing, unlike when the sound-deadening member is in direct contact with the adjustment hole. This prevents the part of the sound deadening member that directly flows from being limited and creating resistance that prevents smooth air evacuation, and the air discharged from the adjustment hole is always diffused in the space and then circulates through the entire sound deadening member. Since the air is discharged to the outside, the air can be discharged smoothly and efficiently at all times, and the air can be discharged in the same manner as before, while increasing the noise reduction effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of this invention.
FIG. 2 is an enlarged sectional view of the same essential part showing the control valve in the closed state during strong combustion, and FIG. 3 is an enlarged sectional view of the same essential part showing the control valve in the open state during weak combustion. DESCRIPTION OF SYMBOLS 1... Combustion part, 2... Combustion fan, 3... Ventilation path, 11... Adjustment hole, 12... Sound deadening member, 13
...Space department.

Claims (1)

[Scope of utility model registration request] An adjustment hole 11 for discharging a part of this combustion air to the outside is provided in the middle of the ventilation path 3 that supplies combustion air from the combustion fan 2 to the combustion section 1.
This combustion device is characterized in that a sound deadening member 12 is provided outwardly to cover the adjusting hole 11, and a suitable space 13 is formed between the adjusting hole 11 and the sound deadening member 12.