KR920009083B1 - Forced air blowing type combustion apparatus - Google Patents

Abstract

The apparatus suitable for all primary-air burning type gas- fired water heater, comprises a combusting section having a combustion chamber for burning fuel gas mixed with primary air and an exhaust discharging way with a noise reduction means; a supplying section for forcedly supplying primary-air and fuel gas to the chamber and mixing them, the section having a plate for closing primary air suction inlet; a combustion plate for dividing the combusting section from the supplying section. Fine control means for reducing pulsating combustion generated from the noise reduction means, is mounted on the primary-air suction inlet.

Description

Forced Blowing Combustion Device

1 is a schematic view showing a gas instantaneous water heater to which the first embodiment of the forced-blast combustion apparatus of the present invention is applied.

2 is a front view of a centrifugal blower attached to a gas instantaneous water heater to which the first embodiment of the forced blow combustion device of the present invention is applied.

3 is a side cross-sectional view of FIG.

4 is a perspective view of a shield plate attached to a gas instantaneous water heater to which the first embodiment of the forced-air combustion device of the present invention is applied.

5 is a perspective view showing a second embodiment of the forced-air combustion device of the present invention.

6 shows an adjustment state of the fine adjustment means applied in the present invention, and FIG. 6A shows a state in which the disc portion of the shield plate is adjusted to the lowest. Figure 6b is a side cross-sectional view of the disk portion of the shield plate is adjusted to the middle height. Figure 6c is a special cross-sectional view of the state where the disc portion of the shield plate is adjusted to the highest.

* Explanation of symbols for the main parts of the drawings

a: Noise reduction means 1: Gas instantaneous water heater (Forced air type combustion device)

2: combustion part 4: supply part

5: scroll casing 6: normal

7: shield plate 8: fine adjustment means

20: combustion case 22: combustion plate

23: combustion chamber 24: exhaust passage

25 exhaust port 61 primary air intake

81: first convex shape attachment portion 82: first convex shape attachment portion

83: third convex shape attachment portion

TECHNICAL FIELD The present invention relates to a forced blow type combustion device, and more particularly, to a combustion device suitable for an all primary air type instantaneous water heater with forced blow type.

Generally, a combustion casing having a combustion chamber for primary combustion of fuel gas and primary air and an exhaust passage for discharging combustion exhaust in the combustion chamber, and a scroll casing having a fan for forcibly supplying combustion air in the combustion chamber. The forced blow type combustion device provided tends to produce analgesic combustion (resonance sound).

In addition, in order to reduce noise, in the forced ventilation type combustion apparatus, a sound absorbing material is provided in the exhaust passage, the exhaust passage is bent, or the exhaust port is reduced to change the shape of the exhaust portion.

Changing the shape of the exhaust port in this way causes a pressure loss in the exhaust passage and causes vibrational combustion. Moreover, even in a combustion apparatus having the same shape of exhaust passage, the combustion extension tube may be attached depending on whether the installation place is outdoors or indoors, or the shape of the exhaust extension tube may be changed. In order to suppress vibrational combustion in the field, an adjustable combustion device is required.

In addition, depending on the appearance design, one exhaust port may be installed, or a plurality of designs may be provided to make different models, and a design change of the exhaust port may occur, or vibration combustion may or may not occur. In some cases, it is preferable to cope with such a case by fine adjustment.

The present invention can be fine-tuned in order to suppress vibrational combustion in the field, such as when the exhaust pipe is connected in relation to the installation location, and in response to the shape of the exhaust passage so as to cope with various types of exhaust ports in terms of design. It is an object of the present invention to provide a forced-blast combustion apparatus which can be fine-tuned to suppress vibration combustion.

In order to achieve the above object, the forced-fired combustion apparatus of the present invention has an exhaust chamber provided with a combustion chamber for combustion reaction between primary air and fuel gas and a noise reduction means for discharging combustion exhaust of the combustion chamber and reducing combustion noise. A forced blower having a combustion section having a furnace and a primary air inlet having a shield plate and a supply section for forcibly supplying and mixing primary air and fuel gas to the combustion chamber and a combustion plate for distinguishing the combustion section and the supply section. In the primary air intake port, a configuration in which fine adjustment means that can be fine-tuned is adopted in order to suppress vibrational combustion generated according to the noise place means of the exhaust passage.

By the above configuration, the forced-air combustion apparatus of the present invention has the following functions and effects.

It is possible to make fine adjustments in order to suppress vibrational combustion in the extension, such as when the exhaust pipe is connected in relation to the installation location of the forced-air combustion device, and to cope with a case where there are several types of exhaust ports in terms of design. In order to suppress vibrational combustion in accordance with the shape of the furnace, fine adjustment means which can be fine-tuned are provided in the primary air intake port, whereby combustion noise of the combustion section can be prevented and vibrational combustion can be prevented.

An embodiment of the forced-air combustion apparatus of the present invention will be described with reference to the drawings.

FIG. 1 shows an all primary air type gas instantaneous hot water heater to which the first embodiment of the forced blow combustion apparatus of the present invention is applied. The forced primary air primary gas instantaneous water heater 1 includes a combustion section 2, a heat exchanger section 3, a supply section 4 for supplying combustion air to the combustion section 2, and a gas supply passage. (9) and an electronic controller (90).

The combustion section 2 is provided with a combustion case 20 and a ceramic combustion plate 22 having a plurality of ejection holes drilled by installing a fixing bracket 21 in the combustion case 20. An exhaust fan having an exhaust passage 24 and an exhaust port 25 which are attached to a combustion chamber 23 for combustion-reacting air and an upper portion of the combustion chamber 23, and for discharging combustion exhaust gas combusted in the combustion chamber 22 ( 26 and an exhaust cylinder (not shown) connected to the exhaust fan 26.

The combustion unit 2 may reduce the opening degree of the exhaust passage 24, may provide a sound absorbing material 27 in the exhaust fan 26 to obtain the sound absorbing effect, and may also bend the exhaust passage 24 and the exhaust passage. Therefore, the shape of the exhaust passage 24 and the passage of the exhaust passage is changed to reduce noise. The exhaust passage 24, the exhaust port 25, the exhaust fan 26, the sound absorbing material 27 and the exhaust passage constitute a noise reduction means a.

The heat exchange part 3 is composed of a plate fin group (31), a water supply pipe (32), and a hot water supply pipe (33) for improving heat exchange efficiency, and is disposed between the combustion plate (22) and the exhaust part (4). The water transferred upstream of (32) is exchanged with the exhaust gas in the combustion chamber (23) to become warm water and flows out into the hot water supply pipe (33).

As shown in FIGS. 2 and 3, the supply part 4 has an outer periphery 43 of the scroll casing 5, the mixing chamber 50, and the flat rotary plate 42 provided with the boss part 41 at the center. And a centrifugal blower (46) comprising a curved fan (45) concave in a rotational direction orthogonal to the rotary plate (42) and an inner motor (44) and a motor (46) for driving the fan (45). It is provided. It is fastened to the rotating shaft 47 of the drive motor 46 by the boss part 41 of the rotating plate 42. In the centrifugal blower 40, a space 48 is formed at the inner circumferential edge 44 of the fan 45.

The scroll casing 5 has a spiral shape, a discharge port 53 which communicates with the three screw holes 52 formed in the side surface 51 and the mixing chamber 50 of the combustion case 20, and the side surface. Fine adjustment and exhaust passage for suppressing vibration combustion at the attachment site of the ordinary body 6 fastened to the 51, the shield plate 7 fastened to the normal body 6, and the gas instantaneous water heater 1 (24) and the fine adjustment means 8 which can be adjusted to the side which suppresses the vibration combustion which generate | occur | produces according to the noise reduction means (a) provided in the exhaust cylinder. The ordinary body 6 forms a bellows-shaped primary air intake opening 61 that is opened outward, and the front end portion 62 suppresses the combustion of vibration caused by the noise reduction means a and the centrifugal blower 40. Cylindrical portion 63 fitted in the fan 45 with only a predetermined dimension taking into account the air volume and the opening area of the suction port, the curved portion 64 bent outwardly, and the ring portion 65 extending from the curved portion 64 to the outer circumferential side thereof. ) The cylindrical part 63 is provided in parallel with the inner periphery 44 of the fan 45 and the rotating shaft 47 of the drive motor 46, and is orthogonal to the rotating plate 42. As shown in FIG. In addition, the cylindrical portion 63 is an intake air passage 66.

The annular portion 65 is formed with a screw hole 67 formed by overlapping with the screw hole of the scroll casing 5.

As shown in FIG. 4, the shielding plate 7 has a conical portion 72 in which the tip 71 is located at the center of the primary air intake 61, and the other end 73 of the conical portion 72. As shown in FIG. Thus, it becomes the disc part 74 extended in the outer peripheral side, and the three attachment leg parts 75 which fall vertically from this disc part 74, and the screw hole 76 was formed.

The fine adjustment means 8 is formed in the annular portion 65 of the ordinary body 6, and has a screw hole 8a, 8b, 8c and a first screw hole 8a formed on the same circumference. The convex attachment part 81, the 2nd convex attachment part 82 formed higher than this 1st convex attachment part 81, and formed the screw hole 8b, and this 2nd convex attachment part ( It becomes higher than 82, and becomes the 3rd convex attachment part 83 which provided the screw hole 8c.

Here, the first, second, and third block-shaped attachment portions 81, 82, and 83 are alternately arranged at regular equidistant intervals, and the attachment leg portions 75 of the shielding plate 7 are shown as shown in the example. If there are 3), they are arranged at 120 ^o intervals. It is possible to make adjustments to suppress vibration combustion caused by the noise reduction means (a) provided in the exhaust cylinder.

The gas supply passage 9 is integrally formed simultaneously with the scroll casing 5, and a gas ejection nozzle 91 for ejecting fuel gas and a gas supply piping 92 for supplying fuel gas to the gas ejection nozzle 91. ) And a gas control unit 93. The gas control unit 93 is provided between the gas ejection nozzle 91 and the gas supply pipe 92, and the electronic opening / closing side 94 and the downstream side of the opening / closing side 94 which open and close according to energization and non-energization. And an electronic proportional control valve 95 provided at a governor side (not shown) for adjusting the gas flow rate and downstream of the governor side, the opening ratio being variable depending on the amount of energization. The other end of the gas ejection nozzle 91 is attached with an orifice 96 for adjusting the supply pressure and the flow rate of the fuel gas.

The electronic control device 90 is a start switch (not shown) which is turned on when the gas instantaneous water heater 1 is used, and a volume for adjusting temperature (not shown) which is set by the user and set hot water flowing out from the hot water supply pipe 33. Control of energization and non-energization of the spark electrode 97, the motor of the centrifugal blower 40, the gas control unit 93, etc., which sparks from the combustion surface of the combustion plate 22 at the time of ignition in response to the pressure of Is done. Reference numeral 98 denotes a thermocouple which detects an oxygen supply state of the flame of the combustion plate 22.

The operation of the gas instantaneous water heater 1 of the present embodiment will be explained based on the drawings.

When the movable switch is turned on, the gas instantaneous water heater 1 starts the drive motor 63 and rotates the fan 45 from the primary air suction port 61 of the scroll casing 5 and the ordinary body 6. The primary air is supplied to the mixing chamber 50.

The electronic controller 90 outputs to the governor side, the open side 94 and the proportional control side 95 of the gas control unit 93 to adjust the gas flow rate by the governor side, and the open / close side 94 Open and change the opening ratio (閱 口 比) in accordance with the proportional control valve (95).

When the fan 45 starts to rotate at high speed, the primary air existing in the space 48 surrounded by the inner circumferential edge 44 of the fan 45 is accelerated in the centrifugal direction, and the outside of the fan 45 is caused by the centrifugal force. Blown out, and is discharged to the mixing chamber 50. In addition, the primary air existing outside the scroll casing 5 is used to control the flow rate of the primary air between the shield plate 7 and the primary air intake port 61 and at the ordinary body 6 and the curved portion 64. While tightening, the air is sucked into the space 48 through the intake air passage 66. At the same time, fuel gas of a predetermined flow rate is supplied from the gas supply passage 9 to the mixing chamber 50.

Here, in order to counter the noise of the combustion unit 2, the opening degree of the exhaust passage 24 is reduced, and the exhaust fan 26 is bent to obtain the sound absorbing effect, but the shape of the exhaust system is changed. Due to the change of shape, pressure loss occurred, which caused vibration combustion.

However, in this embodiment, the shielding plate 7 has a screw hole 8a of the first convex attachment portion 81 of the fine adjustment means 8 and a screw hole 8b of the second convex attachment portion 82. The attachment height of the shielding plate 7 can be changed by selecting the screw hole 8c of the 3rd convex attachment part 83.

That is, as shown in FIG. 6A, when the attachment leg 75 of the shielding plate 7 is aligned with the first convex attachment portion 81 and screwed into the screw hole 8a, the disc portion 74 of the shielding plate 7 6) and 6c, the disk portion of the shield plate 7 is gradually gradually screwed into the second convex attachment portion 82 or 83, as shown in FIGS. 6b and 6c. The installation height of 74 becomes high. Furthermore, since it is possible to change the opening degree of the primary air intake opening 61 by the fine adjustment means 8 as described above, the flow rate of the primary air flowing into the primary supply intake opening 61 is changed. You can also

In other words, in this embodiment, the exhaust extension tube is attached and the shape of the exhaust extension tube is changed, so that vibration combustion caused by the on-site attachment state such as outdoor or indoor or noise reduction means (a) is prevented. The generation of sound can be suppressed. In addition, even in the case where the shape of the exhaust port is changed in various ways by installing one exhaust port or several installations, it is possible to suppress the occurrence of resonance sound by fine-adjusting as the fine adjustment means 8, thereby providing a plurality of shields. The unit price is low because there is no need to install the board. In this embodiment, stable and good combustion can be performed at all times from ignition to normal combustion, in particular, from extinguishing.

5 shows a second embodiment of the forced-air combustion device of the present invention.

=2.2mm×60개) : (28)....을 뚫은 플레이트(29)를 덮개식으로 부착되고 있다. 이 때문에 배기팬(26)이 형성하는 배기통로 (24)를 단축한 결과가 되어 제1실시예의 가스순간온수기(1)보다 진동연소의 발생을 억제할 수 있다. 더구나, 플레이트(29)를 덮개식으로 부착하지 않은 상기 제1실시예의 배기구의 열림면적보다 작게 되기 때문에, 연소소음의 통과량을 저하시킬 수가 가능하기 때문에 진동연소의 발생을 방지하면서 연소소음도 제1실시예보다 더욱 저하시킬 수가 있게 된다.This second embodiment uses a plurality of small holes (a) as noise reduction means a in the exhaust port 25 of the exhaust fan 26 of the first embodiment.

= 2.2 mm x 60 pieces): A plate (29) through which (28). As a result, the exhaust passage 24 formed by the exhaust fan 26 is shortened, so that vibration combustion can be suppressed more than the gas instantaneous water heater 1 of the first embodiment. In addition, since the opening area of the exhaust port of the first embodiment without the cover 29 attached to the cover 29 becomes smaller than the opening area of the exhaust port, it is possible to reduce the passage amount of combustion noise. It becomes possible to lower more than an Example.

In addition, according to the second embodiment, the forced-air combustion apparatus having one hole in the primary air inlet 61 of the supply unit 4 and a plurality of holes in the exhaust port 25 has a significant effect of reducing vibration combustion. It can be confirmed that it is good.

=2.0mm-2.5mm, 사각형의 구멍의 경우는 한 번이 0.8mm-1.4mm가 바람직하나, 1 개의 구멍크기는 한정적인 것이 아니다.In the present embodiment, as the noise reduction means for reducing the noise, the hole formation of the plate is a small hole, but an ellipse or a polygon may be used. Another hole size is for the circular hole

In the case of a square hole of 2.0mm-2.5mm, 0.8mm-1.4mm is preferable once, but one hole size is not limited.

In the present embodiment, the ordinary portion, which is extended to the primary air intake port of the scroll casing, is formed in a cylindrical shape, but the center portion of the projection portion may be curved.

In this embodiment, although the cylindrical part is provided in the primary air intake port of the scroll casing, it is not necessary to provide the cylindrical part.

In this embodiment, the fine adjustment means is provided on the normal body side, but the fine adjustment means may be provided on the shielding plate side.

In the present embodiment, the forced blow type circulation device of the present invention is used for the gas instantaneous water heater, but the forced blow type combustion device of the present invention may be used for a heating device or other forced blow type circulation device.

Claims (3)

Combustion unit having a combustion chamber for combustion reaction between primary air and fuel gas, and an exhaust passage provided with a noise reduction means for exhausting combustion exhaust of the combustion chamber and reducing combustion noise, and shielding shielding the primary air intake port. A forced-air combustion apparatus comprising a plate having a plate and forcibly supplying and mixing primary air and fuel gas to the combustion chamber, and a combustion plate for distinguishing the combustion unit and the supply unit, wherein the primary supply suction port includes: A forced air-fired combustion apparatus, characterized in that fine adjustment means capable of fine adjustment on the suppressing side of vibration combustion generated by the noise reduction means of the exhaust passage is provided. The forced air-fired combustion apparatus according to claim 1, wherein the noise reducing means is a sound absorbing material provided on a side wall of the exhaust passage, which absorbs noise and reduces the opening degree of the exhaust passage. . The forced air-fired combustion apparatus according to claim 1, wherein the fine adjustment means is a convex shield plate attaching portion formed at each height at the primary air intake port.

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