JPH0445737B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to hot air heaters such as oil fan heaters.

BACKGROUND TECHNOLOGY In general, this type of heater heats the room by blowing hot air, but recently, as shown in FIG. In some cases, the heat rays of a metal incandescent body 4 are radiated into the room to provide radiant heating. In FIG. 4, reference numeral 5 denotes an exhaust gas purifying catalyst, which is provided to make the combustion gas from the burner 6, which is blown out as warm air, cleaner. Reference numeral 7 denotes a hot air outlet provided below the main body 1, 8 a fan for hot air, and 9 a hot air path forming body. Further, 3a is a radiation window provided in the combustion tube 3.

In the above configuration, the combustion gas from the burner 6 is guided to the combustion tube 3, rises while heating the incandescent body 4, flows out into the hot air path forming body 9 through the exhaust gas purification catalyst 5, and flows into the fan 8. The hot air is mixed with the air from the hot air outlet 7 and blown out from the hot air outlet 7. Here, the heat rays of the heated red-hot body 4 are radiated into the room via the radiation window 3a and the radiation window 2, thereby performing radiation heating.

However, as mentioned above, this type requires the incandescent element 4 for radiant heating, which increases the cost, and since the incandescent element 4 is originally installed in high-temperature combustion gas, it is susceptible to thermal deterioration. For example, rust occurs due to oxidation, and thermal deformation occurs, causing inconveniences such as uneven red heat and damage.

Therefore, as shown in FIG. 3, we devised a structure in which an exhaust gas purifying catalyst 23 is provided facing the radiation window 12, and red heat emitted from the exhaust gas purifying catalyst 23 is radiated to the outside through the radiation window. To explain Fig. 3 below, 11 is the main body, and the radiation window 12 is at the top of the front.
, and has a hot air outlet 13 below it. 14 is a burner provided in the main body 11 via a stand 15, and 16 is a burner case thereof. Reference numeral 17 denotes a combustion cylinder, which has a radiation window 18 opened at the upper part of the front face opposite to the radiation window 12, and an opening 19 at the front part of the upper part.
It is closed by a canopy 20, and further includes a frame 21 provided within the combustion tube 17 so as to surround the radiation window 18. The frame body 21 also has an opening 22 on the back side facing the radiation window 18. Reference numeral 23 denotes a honeycomb-shaped exhaust gas purifying catalyst disposed in the opening 22 of the frame 21, and is fixed to the opening 22 by bending a claw piece 21a cut and raised from the opening edge of the frame 21. Further, 24 is a hot air path forming body, and 25 is a hot air fan.

In the above configuration, the exhaust gas purifying catalyst 23 is heated by the combustion gas from the burner 14 and becomes red hot, and the heat rays are radiated into the room via the radiation window 18 and the radiation window 12 to perform radiant heating. That is, the exhaust gas purifying catalyst 23 also functions as a conventional metallic red-hot body. Therefore, there is no need for a special member such as a red-hot body, which reduces costs, and the exhaust gas purifying catalyst has the advantage that it does not undergo thermal deterioration unlike a metal red-hot body.

Problems to be Solved by the Invention However, in the configuration as shown in FIG. When the air flows out into the combustion tube 17 and mixes with the air from the fan 25, the air from the fan 25 flows into the combustion tube 17 as shown by arrow A. This increases the pressure loss in the combustion tube 17, and the combustion gas passes through the exhaust gas purification catalyst 23 in a biased manner, resulting in a faster passage speed, and the exhaust gas purification catalyst 23 does not have sufficient purification ability. It may become impossible to purify the combustion gas, which can be achieved as effectively as possible.
Moreover, at the same time that the combustion gas flows in the combustion tube 17 in a biased manner, the wind of arrow A blows against the exhaust gas purifying catalyst 2.
3, the exhaust gas purifying catalyst 23 does not uniformly become red-hot, and the effect of the red-hot body is also reduced.

In view of the above problems, the present invention provides a hot air heater that improves exhaust gas characteristics and exhibits a wide range of radiant heating effects.

Means for Solving the Problems In order to solve the above-mentioned problems, the hot air heater of the present invention is provided with an exhaust gas purifying catalyst in the combustion tube facing the radiation window, and the hot air heater is provided in the combustion tube so that the hot air The combustion tube is arranged at a position that substantially coincides with the center of the fan, and has a diagonally forward upwardly sloping piece having at least the same width as the exhaust gas purifying catalyst at the upper part of the combustion tube behind the exhaust gas purifying catalyst. be.

Effects According to the present invention, with the above-mentioned configuration, the wind from the hot air fan flows through the upper part of the combustion tube along the obliquely forward and upwardly sloping piece, so that it does not flow into the combustion tube, thereby reducing the pressure inside the combustion tube. Loss can be eliminated and the combustion gas can rise uniformly along the combustion tube, so the exhaust gas purification catalyst can be uniformly heated to red heat, improving the purification of the combustion gas.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 31 is a main body having a radiation window 32 at the upper front surface and a hot air outlet 33 below the radiation window 32. 3
4 is a burner provided in the main body 31 via a stand 35, and 36 is a burner case thereof. Reference numeral 37 denotes a combustion tube, which has a radiation window 38 opened at the upper front face opposite to the radiation window 32, an opening 39 in the front part at the upper part, and an inclined piece 40 facing diagonally forward and upward at the rear with the width of the opening 39. A canopy 41 of approximately the same size is placed thereon, and a frame 42 is provided within the combustion tube 37 so as to surround the radiation window 38. The upper part of the combustion cylinder 37 is arranged at a position that almost coincides with the center of the fan 44 for hot air. The frame body 42 has an opening 42a on the back side facing the radiation window 38, and the honeycomb-shaped exhaust gas purifying catalyst 43 is opened in the opening 42a by bending the cut and raised claw pieces 42b from the frame body 42. It is fixed at 45 is a hot air path forming body.

Next, the operation of the configuration of this embodiment will be explained. Combustion gas from the burner 34 is guided to the combustion tube 37 and rises, passes through the exhaust gas purification catalyst 43, flows out from the radiation window 38 and the opening 39 of the canopy 41 into the hot air path forming body 45, and from the fins 44. The warm air is mixed with the air and blown out from the hot air outlet 33.

Here, since the inclined piece 40 is provided on the canopy 41, the wind from the fan 44 flows along the inclined piece 40 as shown by arrow B, and does not flow into the combustion tube 37 as in the conventional case. Further, as is clear from the drawing, the inclined piece 40 is provided at the rear of the exhaust gas purification catalyst 43, so that the flow of the combustion gas rising inside the combustion cylinder and passing through the rear part of the exhaust gas purification catalyst 43 is controlled. There is no obstruction. Therefore, the combustion gas rises uniformly along the combustion tube 37, uniformly heating the exhaust gas purifying catalyst 43, making it red-hot, and improving the purifying ability.

Further, since the entire area of the exhaust gas purifying catalyst 43 becomes red hot uniformly, a wide radiant heating effect can be obtained by the heat rays radiated indoors through the radiant window 38 and the radiant window 32.

Effects of the Invention As described above, the present invention provides a diagonally forward upwardly inclined piece having at least the same width as the exhaust gas purification catalyst at the upper part of the combustion tube behind the exhaust gas purification catalyst. This prevents wind from flowing into the exhaust gas purification catalyst at the top of the combustion cylinder, and also prevents the flow of combustion gas rising inside the combustion cylinder from being obstructed by the inclined piece. It equalizes the red heat of the air, improves the exhaust gas purification effect, and provides even and uniform radiant heating.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a combustion tube of a hot air heater according to an embodiment of the present invention, Fig. 2 is a sectional view of the same hot air heater, and Fig. 3 is a conventional improvement plan leading up to the present invention. FIG. 4 is a sectional view of a conventional hot air heater. 31... Main body, 32... Radiation window, 37... Combustion tube, 40... Inclined piece, 43... Exhaust gas purification catalyst, 44... Fan, 45... Hot air path forming body.

Claims (1)

[Claims] 1.Equipped with a main body having a radiation window on the front surface, a combustion tube provided in the main body, and a hot air path forming body surrounding the combustion tube, the combustion tube has a radiation window in a portion of the main body facing the radiation window. In addition to providing a window and a catalyst for purifying exhaust gas, the upper part of the combustion tube is arranged at a position that almost coincides with the center of the hot air fan, and at least the exhaust gas is A hot air heater equipped with an upwardly sloping piece that is approximately the same width as the purification catalyst.