JPH0345000Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is a forced-air combustion system in which combustion air sucked through an air supply cylinder is forcibly supplied to a combustor by an air supply fan. Device.

(b) Prior Art A conventional example of this type of forced air combustion device is Utility Model Application Publication No. 60-60540. This configuration is shown in FIG. 4 and will be described below.

1 is a feed cylinder, 2 is a small hole 3 for weak combustion air supply at the bottom
4 is a bypass path provided to bypass the damper wall 2, 5 is a bypass path 4
6 is an inlet of the bypass, and 7 is an outlet of the bypass. 8 is an on-off valve that opens and closes the inlet 6; 9 is a solenoid that operates the on-off valve 8; 10 is a solenoid that extends from the damper wall 2 above the small hole 3 to the downstream side thereof so as to face the outlet 7; This is a rectifying wall formed by

With the conventional configuration as described above, the inlet 6 of the bypass passage 4 is opened and a large amount of air is sent from both the small hole 3 and the bypass passage 4, causing a "beep" sound during strong combustion.
However, on the contrary, when the inlet of the bypass passage 4 is closed and a small amount of air is sent only from the small hole 3 during weak combustion, the small hole 3 on the downstream side of the damper wall 2 as shown in FIG. A whirlpool-like turbulent flow occurs in the surrounding area, and
It has the disadvantage of producing an abnormal sound.

(c) Problems to be solved by the invention The purpose is to prevent the generation of abnormal noises during weak combustion as well as abnormal sounds during strong combustion.

(d) Means for solving the problem The present invention provides a rectifying wall in the intake cylinder downstream of the intake air amount regulating damper wall and facing the outlet of the bypass passage, and the bypass of the rectifying wall An appropriate number of through holes are drilled in the area facing the outlet of the channel.

(E) Effect: Block the inlet of the bypass passage and supply a small amount of air only from the small holes.During weak combustion, some of the air that has passed through the small holes flows into the bypass above the straightening wall through the through holes in the straightening wall. Escape to the outlet side of the road.

(e) Embodiments The present invention will be explained based on the embodiments shown in FIGS. 1 to 3, with the same numbers assigned to the same elements as in the prior art.

11 is an exterior case; 12 is a horizontal reflector that vertically partitions the combustion section 13 and the combustor 14 provided in the middle of the exterior case 11; 15 is the horizontal reflector 12;
A vertical reflector 16 is installed in the upper part of the outer case 11, and an exhaust inflow part 17 communicating with the combustion part 13 is provided at the lower center of the vertical reflector 16. An exhaust pipe 18 for discharging exhaust gas during combustion to the outside extends from a proper position on the right end of the upper surface.

Reference numeral 26 designates an air air housing fixedly mounted on the inner bottom of the outer case 11, and houses therein a motor 19 and an air supply fan 20 mounted on the rotary shaft 19' of the motor. Reference numeral 21 denotes a combustion tube made of heat-resistant transparent glass that constitutes the combustion section 13. Exhaust gas within this combustion tube 21 is discharged to the outside from the exhaust tube 18 via the exhaust casing 16.

The combustor 14 is connected to the upper surface of the air casing 26, and a fuel atomizer 23 is provided in the vaporization chamber 22, which is rotated by the rotating shaft 19 of the motor, and is supplied through a fuel supply pipe 24. The fuel is sprayed into the vaporization chamber 22 and vaporized, and a mixture of this vaporized gas and combustion air forcibly supplied by the air supply fan 20 is ejected from the flame port 14' to form the combustion tube 21. Burn it inside. Further, 25 is a red-hot member hanging down toward the flame port 14'.

Reference numeral 1 denotes a supply cylinder made of metal or synthetic resin, which introduces combustion air from outside the exterior case 11 through a filter 27, and one end of which is connected to the air housing 26.
The other end is connected to the opening of the exterior case 11 with screws etc., and the other end is screwed to the opening of the outer case 11.
8 etc., and the supply cylinder 1 has a cylindrical main body 1.
It is composed of two parts: a and a bypass case 5 that constitutes a bypass path 4. An inlet 6, which serves as a bypass inlet, and an outlet 7, which serves as a bypass outlet, each having a different opening area, are provided on the upper surface of the circumferential wall of the main body 1a at intervals. Further, in the main body 1a located between the inlet port 6 and the outlet port 7, there is provided an air supply amount regulating damper wall 2 formed with small holes 3 for regulating the amount of combustion air supplied. On the downstream side of the damper wall 2 and facing the outlet 7 of the bypass passage 4, and further above the small hole 3, a combustion air flow flowing out from the outlet 7 is connected to the feed cylinder by integrally or by fitting. A rectifying wall 10 is installed that is oriented in the longitudinal direction of the flowchart.

A suitable number of through holes 29, 29, .

On the other hand, the bypass case 5 has a recessed part 31 integrally formed with a through hole 30 in the center thereof, facing the inflow port 6 on its upper surface.
A solenoid 9 for driving an on-off valve 8 for opening and closing the inlet 6 is mounted and fixed on the upper surface corresponding to the inlet 6. Furthermore, the bypass case 5 has a flange portion 32 integrally formed around the lower end opening. The above-mentioned bypass passage 4 is formed by fixing to the main body 1a with a pin 33 through a gasket. Further, 34 is a spring that is energized so that the on-off valve 8 closes the inlet 6.

Next, the operation of the present invention will be explained. First, strong combustion will be explained. When the combustion device performs a strong combustion operation, the solenoid 9 drives the on-off valve 8 to open the inlet 6, and at the same time, the motor 19 is activated to rotate the air supply fan 20. Then, air is introduced into the feed cylinder 1 via the filter 27, the introduced air flows into the bypass passage 4 through the inlet 6, and the air flowing out from the outlet 7 is passed through the flow control wall 10 into the feed cylinder. The air is oriented and rectified in the longitudinal direction of 1 and merges with the air introduced through the small holes 3 to form the airflow casing 26.
The combined air is supplied to the vaporization chamber 22 of the combustor 14 and contributes to combustion as primary combustion air.

Next, weak combustion will be explained. By manual operation or when the indoor temperature reaches the set temperature, the temperature sensor is activated to reduce the rotation speed of the motor 19 and reduce the air supply capacity of the air supply fan 20, and at the same time deenergize the solenoid 9 and close the bypass path. The opening/closing valve 8 closes the inlet 6 of No. 4.

Then, the bypass passage 4 is closed and the supply cylinder 1
The air introduced into the combustor 1 flows only through the small holes 3 of the damper wall 2, and a small amount of air suitable for weak combustion flows into the combustor 1.
4. A part of the air that has passed through the small holes 3 flows through the through holes 29, 29 of the rectifying wall 10, as shown in FIG.
...and escapes to the upper side of the rectifying wall 10, so that no swirl-like turbulent flow is generated around the small holes 3 on the downstream side of the damper wall 22.

(g) Effect During strong combustion, the downward air introduced through the bypass passage 4 can be directionally rectified in the longitudinal direction of the feed cylinder 1 by the rectifying wall 10, so that the small holes 3
When the air is merged with the air introduced from the air, since the directionality of each air is the same, it is possible to prevent the generation of vortices and also to prevent the generation of whistling noise due to the resonance of the feed cylinder 1. Also, even during weak combustion, a part of the air that has passed through the small holes 3 in the damper wall escapes upward from the through holes 29, 29... in the straightening wall 10, preventing the generation of vortex-like turbulence in this part, and preventing abnormalities. No sound is generated.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main parts of the forced air combustion device of the present invention, Figure 2 is a sectional view taken along line A-A' in Figure 1, and Figure 3
This figure is also a sectional view of the main parts as seen from the front, and FIG. 4 is a diagram explaining a conventional example, and is a sectional view of the main parts corresponding to FIG. 1. 4... Bypass path, 1... Feed cylinder, 14... Combustor, 10... Rectifying wall, 3... Small hole, 29... Through hole, 8... Opening/closing valve, 6... Inlet, 7... ...outlet.

Claims (1)

[Scope of utility model registration request] a supply cylinder; a damper wall provided in the supply cylinder and having a small hole for regulating the amount of combustion air supplied;
weak combustion air introduced through a small hole in the damper wall, comprising an inlet provided on the upstream side of the damper wall, an outlet provided on the downstream side of the damper wall, and a bypass passage having an on-off valve; Alternatively, either the weak combustion air and the strong combustion air, which is obtained by opening the on-off valve provided in the bypass passage and the air introduced by bypassing the damper wall, are forced into the combustor by an air supply fan. A rectifying wall is provided in the intake cylinder on the downstream side of the intake air amount regulating damper wall and facing the outlet of the bypass passage, and an outlet of the bypass passage of the rectifying wall is provided. A forced air combustion device characterized by having an appropriate number of through holes in a portion facing the.