JP2013002697A - Fan-forced heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fan-forced heater, which reduces unburned gas and odor, and is pleasant.SOLUTION: As a catalyst body 19 having an oxidation catalyst 20 is provided in an upper part of a flow-adjusting plate 16 having a flow-adjusting hole 15 provided in an upper part of a burning cylinder 11, and the oxidation catalyst 20 is provided at a position right above the flow-adjusting hole 15 in the same size as the flow-adjusting hole 15, burning gas which rises inside the burning cylinder 11, and passes the flow-adjusting hole 15 of the flow-adjusting plate 16 passes the oxidation catalyst 20 of the catalyst body 19 positioned in an upper part of the flow-adjusting hole 15 as it is. Accordingly, it is possible to attempt a reduction of odor during burning and upon fire fighting operations. Further, as the oxidation catalyst 20 has the same size as the flow-adjusting hole 15, the burning gas which passes the flow-adjusting hole 15 and rises passes the whole of the oxidation catalyst 20 uniformly, and the whole of the oxidation catalyst 20 can be maintained in an active temperature sphere to achieve fine catalyst action.

Description

  The present invention relates to odor reduction in a warm air heating apparatus that discharges combustion gas as it is into a room as warm air to heat the room.

  Conventionally, in this type, as shown in FIG. 3, the gas pumped by the electromagnetic pump 101 is vaporized by the vaporizing cylinder 103 which vaporizes the fuel by the vaporizing heater 102, and the combustion supplied by the combustion fan 104. Primary air is premixed and burned by a burner 105 having a flame hole, and the burner 105 and the heat back portion 106 are divided into an upper partition plate 108, a lower partition plate 109, and a side plate (not shown). In the air blowing box 110 constituted by

  The combustion cylinder 111 provided around the burner 105 on the lower partition plate 109 has a combustion confirmation window 112 at the center of the front surface, a combustion secondary air intake 113 at the lower back surface, and an upper end of the combustion cylinder 111. A rectifying plate 116 having a plurality of large and small rectifying holes 115 is fixed via a locking claw 114.

  Then, a catalyst body 119 is attached to the rectifying plate 116 at a peripheral upper portion with a rectifying plate 116 and a gap 118 so that the catalyst body 119 is tilted forward and the combustion gas passes through the catalyst body 119. The carbon monoxide and hydrocarbons in the combustion gas are oxidized to reduce nitrogen oxides, and the odor component in the combustion gas is removed in the same manner to reduce odor.

  When the combustion is started, the flame generated by the combustion of the burner 105 during the combustion is completely burned by the combustion secondary air in which a part of the blast from the convection fan 120 is introduced from the combustion secondary air intake 113, The combustion exhaust gas generated by this combustion rises in the combustion cylinder 111, passes through the rectifying plate 116, removes unburned gas and odor at the catalyst body 119, and is blown out into the room through the hot air outlet 121. It was. (For example, refer to Patent Document 1.)

JP 2000-97495 A

  By the way, in this conventional type, in order to suppress nitrogen oxides in the combustion gas, to make the hot air temperature uniform, or to prevent the flame from being locally ejected from the combustion cylinder 111, the current is rectified at the upper end of the combustion cylinder 111. Although the rectifying plate 116 having the hole 115 is fixed, the portion directly above the rectifying hole 115 in the catalyst body 119 becomes a high temperature because combustion gas always passes, and the catalyst body 119 is not directly above the rectifying hole 115. Since the combustion gas does not pass through the portion of FIG. 6 compared with the portion directly above, the temperature is lower than that of the portion directly above.

  Therefore, the catalyst body 119 does not reach a uniform high temperature state, so that carbon monoxide and hydrocarbons in the combustion gas are oxidized to reduce nitrogen oxides, or odor components in the combustion gas are removed to reduce odor. There is a problem that it cannot be stably performed on the entire catalyst body 119.

  In order to solve the above-mentioned problems, the present invention is particularly configured in the first aspect by premixing a vaporizing cylinder for vaporizing fuel, the vaporized gas and combustion primary air supplied by a combustion fan. A burner to be burned in the formed flame hole, and a combustion cylinder provided so as to surround the burner, a rectifying plate having a rectifying hole is provided at an upper portion of the combustion cylinder, and an upper portion of the rectifying plate is provided In the hot air heating apparatus provided with a catalyst body having an oxidation catalyst, the oxidation catalyst is the same size as the straightening hole and is provided at a position directly above the straightening hole.

  Further, in the hot air heating apparatus according to claim 2, in particular, the configuration thereof according to claim 1, wherein the rectifying plate has a plurality of rectifying holes, and the catalyst body is arranged in a position directly above the rectifying holes. Is provided with an oxidation catalyst of the same size.

  According to the first aspect of the present invention, the catalyst body having the oxidation catalyst is provided on the upper part of the rectifying plate having the rectifying hole provided in the upper part of the combustion cylinder, and the oxidization catalyst has the same size as the rectifying hole, Because it is located directly above, the combustion gas that has risen in the combustion cylinder and passed through the rectifying hole of the rectifying plate passes through the oxidation catalyst of the catalyst body located above the rectifying hole as it is. It is possible to reduce the odor at the time.

  Further, since the oxidation catalyst of the catalyst body is the same size as the rectifying hole of the rectifying plate, the combustion gas rising through the rectifying hole of the rectifying plate uniformly passes through the entire oxidation catalyst of the catalytic body, thereby As a whole, the temperature becomes high, and the entire oxidation catalyst can be maintained in the active temperature range to exhibit good catalytic action.

  Moreover, according to the hot air heating device of the second aspect of the present invention, the rectifying plate has a plurality of rectifying holes, and the catalyst body has the same size as each rectifying hole at a position directly above each rectifying hole. Since the oxidation catalyst is provided, the flow straightening holes in the flow straightening plate are sized in order to suppress nitrogen oxides in the combustion gas, to make the hot air temperature uniform, and to prevent the flame from blowing out locally from the combustion cylinder. Even if a plurality of rectification holes are provided, the oxidation catalyst having the same size as each rectification hole corresponds to the combustion gas rising from each rectification hole. It can exert its action.

Sectional drawing of the warm air heating apparatus which shows one Embodiment of this invention The perspective view of the combustion cylinder. Sectional drawing of the conventional warm air heating apparatus. The perspective view of the combustion cylinder.

Next, one embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a vaporizing cylinder that vaporizes fuel pumped by an electromagnetic pump 2 by a vaporizing heater 3. The vaporized gas and combustion primary air supplied by a combustion fan 4 are premixed, and a flame hole is formed in an upper net. While being burned by the burner 5, the load of the vaporizing heater 3 during combustion is reduced by the heat back part 6, and the burner 5 and the heat back part 6 are divided into an upper partition plate 8 and a lower partition plate that divide the inside of the main body 7. 9 and protrudes into a blower box 10 composed of a side plate (not shown).

  Reference numeral 11 denotes a combustion cylinder provided around the burner 5 on the lower partition plate 9. The combustion cylinder 11 has a combustion confirmation window 12 in the center of the front surface, a combustion secondary air intake port 13 in the lower part of the back surface, and an upper end of the combustion cylinder 11. A rectifying plate 16 having a rectifying hole 15 is fixed via a locking claw 14.

  The catalyst body 19 is attached to the rectifying plate 16 with the rectifying plate 16 and the gap 18 at the upper periphery of the rectifying plate 16 so that the catalyst body 19 is inclined forward. The flame is stabilized and the first catalyst body 19 is heated to an appropriate temperature.

  The catalyst body 19 includes a disk-shaped oxidation catalyst 20 formed by impregnating a catalyst solution in which iron oxide for thermal catalyst is mixed into a honeycomb filter obtained by extruding and firing calcium aluminate, fused silica or the like, and the oxidation catalyst 20. Combustion gas which consists of the disk-shaped catalyst attachment bracket 22 which attaches the catalyst 20 to the catalyst attachment hole 21 of the substantially center, and the combustion gas which rose from the rectification | straightening hole 15 of the rectification | straightening plate 16 passes through the oxidation catalyst 20 of the catalyst body 19, is combusted. It oxidizes carbon monoxide and hydrocarbons in the gas to reduce nitrogen oxides, and also removes odorous components in the combustion gas in the same manner to reduce odors.

  Reference numeral 23 denotes a hot air outlet that is opened at the lower front of the blower box 10 and is provided with a large number of louvers 24. Reference numeral 25 is a warm air outlet that is opened at the rear of the blower box 10 and has an opening above the hot air outlet 23. A convection fan 27 is attached to the warm air intake port 25 via a convection fan guard 26 in which a thin plate is formed into a porous shape by punching.

  A guide plate 28 is provided above the combustion cylinder 11 in the blower box 10, and a cooling passage 29 is formed between the upper partition plate 8 and the fan 7 to prevent the main body 7 from being heated by passing air from the convection fan 27. It is what you are doing.

  A combustion control unit 30 controls the electromagnetic pump 2, the vaporizing heater 3, the combustion fan 4, the convection fan 27, an igniter (not shown), and the like.

Next, the operation of one embodiment of the present invention will be described.
The flame generated by the combustion of the burner 5 during combustion is completely combusted by the combustion secondary air that has flowed in from the convection fan 27 through the combustion secondary air intake port 13. The rectifying plate 16 and the gap 18 between the rectifying plate 16 and the catalyst body 19 are designed so that the flame is not biased or unstable by the combustion secondary air that is twisted by inertial force. The generated combustion exhaust gas rises in the combustion cylinder 11, passes through the rectifying hole 15 of the rectifying plate 16, removes unburned gas and odor by the oxidation catalyst 20 of the catalyst body 19, and is purified and deodorized.

  The oxidation catalyst 20 of the catalyst body 19 is heated to a high temperature by the passing combustion exhaust gas, and the entire oxidation catalyst 20 is kept in the high temperature active temperature range by the convection fan 24 passing through the upper and lower gaps 18 of the catalyst body 19. Demonstrates good catalytic action.

  Next, when a fire extinguishing switch (not shown) is turned on, the combustion control unit 30 enters a fire extinguishing operation. First, the convection fan 27 is braked and stopped, and after a delay time, the electromagnetic pump 2 and the combustion fan 4 are stopped. Burn out residual gas.

  At this time, since the convection fan 27 is stopped, the residual gas is combusted to generate a combustion gas containing a large amount of unburned gas and odor, and the combustion gas naturally rising in the combustion cylinder 11 is the oxidation catalyst 20 of the catalyst body 19. Since the unburned gas and odor are removed through the air and are naturally discharged into the room through the hot air intake port 22 on the back of the blower box 10, the odor can be greatly reduced even during fire extinguishing.

  Then, after the residual gas is burned out, the convection fan 27 and the combustion fan 4 operate again for a certain period of time to cool the vicinity of the burner 5 and extinguish the fire.

  Accordingly, in the present invention, the combustion gas that has risen in the combustion cylinder 11 and passed through the rectifying hole 15 of the rectifying plate 16 passes through the oxidation catalyst 20 of the catalyst body 19 positioned above the rectifying hole 15 as it is. It is possible to reduce the odor during the fire extinguishing operation.

  Further, since the oxidation catalyst 20 of the catalyst body 19 is the same size as the rectifying hole 15 of the rectifying plate 16, the combustion gas rising through the rectifying hole 15 of the rectifying plate 16 is uniform throughout the oxidation catalyst 20 of the catalyst body 19. Thus, the oxidation catalyst 20 as a whole becomes a high temperature, and the oxidation catalyst 20 can be kept in the activation temperature range to exhibit a good catalytic action.

  In this embodiment, the rectifying hole 15 of the rectifying plate 16 is made one, and the oxidation catalyst 20 of the catalyst body 19 is also made corresponding to it. Is formed, a plurality of oxidation catalysts 20 of the catalyst body 19 may be provided so as to be positioned above the rectifying holes 15.

  As a result, the size of the rectifying hole 15 of the rectifying plate 16 is changed in order to suppress nitrogen oxides in the combustion gas, to make the hot air temperature uniform, or to prevent the flame from locally ejecting from the combustion cylinder 11. Even if a plurality of the oxidation catalysts 20 are provided, the oxidation catalyst 20 having the same size as each of the rectifying holes 15 corresponds to the combustion gas rising from each of the rectifying holes 15, so that each oxidation catalyst 20 is kept in the active temperature range as a whole. Can exhibit a good catalytic action.

DESCRIPTION OF SYMBOLS 1 Vaporization cylinder 4 Combustion fan 5 Burner 11 Combustion cylinder 15 Current flow hole 16 Current flow plate 19 Catalyst body 20 Oxidation catalyst

Claims (2)

  A vaporizing cylinder for vaporizing the fuel, a burner for premixing the vaporized gas and the combustion primary air supplied by the combustion fan and burning in the formed flame hole, and a combustion cylinder provided around the burner are provided. In the warm air heating apparatus in which a rectifying plate having a rectifying hole is provided at an upper portion of the combustion cylinder and a catalyst body having an oxidation catalyst is provided on the rectifying plate, the oxidation catalyst has a rectifying hole and A hot-air heating device having the same size and provided at a position directly above the rectifying hole.   The hot air heating device according to claim 1, wherein the current plate has a plurality of current flow holes, and the catalyst body is provided with an oxidation catalyst having the same size as each current flow hole at a position directly above each current flow hole. .

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