JPS6125564Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to an improvement of hot air heaters. In other words, in conventional hot air heaters, if the hot air outlet is blocked for some reason, hot air remains inside the frame. Therefore, in such cases, it was necessary to ensure that there was no abnormality or to quickly extinguish the fire. (This is also stipulated in the JIS standard.) Conventionally, a temperature sensing element is provided in the frame to detect abnormal heating within the frame, and combustion is stopped when the temperature sensing element detects abnormal heating. It was something that was happening.

However, until the temperature inside the frame reaches the operating temperature of the temperature sensing element, especially in the case where the combustion hot air of the combustion burner is released as hot air, the hot air fan's air directly acts on the combustion of the combustion burner, causing abnormalities. There was a risk of combustion and abnormal combustion resulting in fire, etc.

This invention focuses on this point and attempts to provide a hot air heater that eliminates the above-mentioned drawbacks.

Next, an embodiment of this invention shown in the drawings will be described. Reference numeral 1 denotes a combustion burner having a concave shape and having a plurality of flame ports 2 arranged in two rows around the upper part and provided within a frame 3. It is equipped with a heater 4 that heats the fuel to about 200 to 240 degrees, and vaporizes the fuel and burns it at the upper flame port 2.

Reference numeral 5 designates the combustion burner 1 by projecting the upper part of the combustion burner 1 through a through hole 7 bored in the approximate center of the bottom plate 6.
A combustion chamber whose upper part is covered, and the combustion hot air generated by combustion in the combustion burner 1 is discharged into the room from a discharge port 9 at the front by blowing air from a hot air fan 8 provided at the rear of the frame 3. A guide plate 12 is formed on the upper part of the rear wall surface 11 of the combustion chamber 5 and is inclined upwardly toward the front. A see-through window 14 that faces the viewing window 13 and has a glass or the like that exposes the combustion of the combustion burner 1 to the outside.
is provided.

Reference numeral 15 denotes a cylindrical flame tube with a draft effect that covers the combustion burner 1 with a gap that does not contact the flame of the combustion burner 1 inside the combustion chamber 5, and has a plurality of small holes in the upper part. A dissipating section 16 is formed to diffuse and release the formed combustion hot air into the air passage 10, and a see-through window 14 and a viewing window 1 are provided at the front to transmit the combustion flame.
A plurality of through holes 17 are bored through which the frame 3 is exposed to the outside through the combustion chamber 5, and between the wall surface 11 of the combustion chamber 5 and the flame tube 15, there is a hole 17 through which the temperature that is blown in when the outlet 9 is closed is provided. A flow path 18 is formed with a spacing smaller than the inner diameter of the flame tube 15 so that the flow rate of the air blown by the wind fan 8 is at least faster than that flowing through the flame tube 15, and further below the flow path 18, the air flowing through the flow path 18 is formed. Even when the discharge port 9, which blows the air from the bottom to the top from the flame port 2 of the combustion burner 1, is closed, the flame tube 15
A ventilation means 19 is provided which directs the flame upward against the hot air blowing from the hot air fan 8 blowing into the interior.This ventilation means 19 is a small gap 20 formed between the lower part of the flame tube 15 and the bottom plate 6. Further, an air supply hole 21 formed in the bottom plate 6 facing the flow passage 18 and the air supply hole 2
1 is a communication passage 23 that communicates with the through hole 7 located below the flame nozzle 2 of the combustion burner 1 and the supply hole 22, and a ventilation means 19 is provided for either or both of them.
is composed of

Reference numeral 24 denotes a stand that supports the combustion burner 1 and is provided between the bottom plate 6 of the combustion chamber 5 and the bottom plate 6 through a communication path 23, and a support frame 25 that accommodates the lower part of the combustion burner 1 is fixed thereto.

Reference numeral 26 denotes a combustion fan that supplies combustion air into the combustion burner 1 through a wind barrel 27. At the tip of the wind barrel 27, atomized fuel is supplied into the combustion burner 1 by changing the amount of fuel supplied according to the head wind pressure. A fuel supply nozzle 28 is provided for supplying fuel.

29 is provided on the rear wall 11 of the combustion chamber 5, and senses when the inside of the frame 3 becomes abnormally high temperature and stops the operation of the operating mechanisms such as the hot air fan 8 and the combustion fan 26 to stop combustion. Temperature sensing element.

30 is a lower plate on which the frame 3 is placed.

This idea is constructed as described above,
Next, the operation of this embodiment of the invention will be explained. By a well-known combustion operation, the mixed gas vaporized and mixed in the combustion burner 1 is released from the flame port 2 and lit by an appropriate igniter (not shown). It is ignited, forms a flame, and starts combustion.

The combustion heat generated by this combustion is
Due to the draft effect, the air rises upward smoothly and is diffused and released through the dissipation section 16. At this time, the hot air is emitted into the room from the front outlet 9 by the hot air fan 8 flowing through the air passage 10. The air heats the room, and the combustion hot air is diffused and released by the dissipation part 16 and mixed with the wind from the hot air fan 8, so the odor peculiar to the combustion hot air is removed, and the hot air from the hot air fan 8 is removed. The wind No. 8 is guided by the guide plate 12 at the rear of the combustion chamber 5, increases the flow velocity above the dissipation part 16, and improves the mixing of the hot air and the blown air, further removing odor and obtaining good warm air. It is.

Next, if the outlet 9 is blocked for some reason, the air blown by the hot air fan 8 will be trapped inside the frame 3, resulting in an abnormally high temperature inside the frame 3, which will be transferred to the temperature sensing element 29.
is detected and stops combustion to prevent danger, but the hot air fan 8 blows into the flame of the combustion burner 1 by the time the inside of the frame 3 reaches the detection temperature at which the temperature sensing element 29 operates. Conventionally, the hot air fan 8 blows the air downward in the combustion chamber 5, causing the fire to flow downwards, and the flames burn out combustible materials such as the combustion mechanism below the combustion chamber 5, causing the fire to burn out. There was a risk of damage or fire due to the presence of paint.

However, in this invention, a flame cylinder 15 that covers the combustion burner 1 is provided in the combustion chamber 5, a flow passage 18 is formed between the combustion chamber 5 and the wall surface 11, and a ventilation means 19 is provided below the flow passage 18. As a result, the air blown by the warm air fan 8 flows downward in the combustion chamber 5, but within the flame tube 15, this air is weakened to some extent by the upward current of hot air due to the draft effect, and the inner diameter of the flame tube 15 is reduced. The air flowing through the smaller spaced flow passages 18 has a higher flow velocity than the air flowing through the flame tube 15 in the flow passages 18, and passes through the lower ventilation means 19, that is, the small gap 20, the air supply hole 21, and the communication passage 23. blow from below to the top of the flame opening 2 through the through hole 7 and the supply hole 22, directing the flame upward against the blowing air with an upward wind stronger than the blowing air, and bringing the flame to a normal state until the temperature detected by the temperature sensing element 29 is reached. This is to prevent damage to the operating mechanism or fire.

Further, due to the draft effect of the flame cylinder 15, the flow passage 18, and the ventilation means 19, secondary air is smoothly supplied to the combustion burner 1 even during normal combustion, resulting in good combustion. As described above, this invention forms a combustion chamber 5 having a combustion burner 1 below in a frame 3, and blows hot combustion air from the combustion burner 1 through a discharge port 9 into the frame. 3. For those that heat the air by emitting heat to the outside,
The combustion chamber 5 is provided with a flame tube 15 that has a dissipation part 16 for discharging combustion hot air from the combustion burner 1 at an appropriate place and covers the combustion burner 1, and further includes a flame tube 15 and a flame tube 15 that covers the combustion burner 1.
A flow passage 18 is formed between the combustion burner 1 and the wall surface 11 at intervals smaller than the inner diameter of the flame cylinder 15, and at the bottom of the flow passage 18 there are a plurality of holes or Since a certain ventilation means 19 is provided from the passage, etc., even if the outlet is blocked for some reason and the warm air fan acts on the combustion chamber before the temperature sensing element is activated, the combustion chamber will not be affected. A flame tube is provided to cover the combustion burner, and a flow passage is provided between the combustion chamber and the wall surface, and a ventilation means is provided below the flow passage, so that hot air from the fan that flows downward inside the flame tube is provided. The wind power of the blast is weakened by the upward current of hot air due to the draft effect inside the flame tube, and the air flowing down through the flow passages that are spaced smaller than the flame tube has a flow velocity higher than that of the air flowing inside the flame tube, which increases the airflow below. Since the air is vigorously blown upward from the bottom of the combustion burner through the means, the flame is maintained in a normal state until the temperature sensing element is activated, and unlike conventional methods, equipment damage or fires caused by the downward direction of the flame can be avoided. This prevents the risk of injury, ensures safety, and gives the user a sense of security. Furthermore, since the air is blown at multiple locations and from different angles, it is possible to direct the fire upward in a well-balanced manner and to obtain a good fire with fine wood grains. Furthermore, during normal combustion,
Combustion air is supplied smoothly and accurately through the draft effect of the flame tube, the flow path, and the ventilation means,
It has advantages such as good combustion.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of this invention, Figure 2 is a sectional view showing an embodiment of this invention.
The figure is an enlarged sectional view of the same main part. 1... Combustion burner, 3... Frame, 5... Combustion chamber, 8... Warm air fan, 9... Discharge port, 11...
Wall surface, 15...Flame cylinder, 16...Diffusion part, 18...
Distribution path, 19... ventilation means.

Claims (1)

[Scope of utility model registration request] A combustion chamber 5 having a combustion burner 1 below is formed in the frame 3, and combustion hot air from the combustion burner 1 is blown by a hot air fan 8 and discharged to the outside of the frame 3 through a discharge port 9 to provide heating. In this case, the combustion chamber 5 is equipped with a flame tube 15 that has a dissipation part 16 for discharging combustion heat from the combustion burner 1 at an appropriate place and covers the combustion burner 1, and further includes a flame tube 15 and a combustion chamber 5. A flow path 18 is formed between the combustion burner 1 and the wall surface 11 at intervals smaller than the inner diameter of the flame tube 15, and at the bottom of the flow path 18, there are a plurality of holes or holes for blowing air from below to above the combustion burner 1 from different angles. A hot air heater characterized by being provided with a ventilation means 19 consisting of a passage or the like.