JP2001349613A - Gas warm-air furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas warm-air furnace in which such a problem is eliminated that convection air is reduced, and extended combustion gas hits a heat- shield body to raise its temperature, and a front board is heated, in the case when a filter is clogged with dust. SOLUTION: A deflection heat-shield board 17 is provided between the top face of the heat-shield body 6 and an upper combusting guide 4. The board 17 prevents high-temperature combustion gas from being discharged to the direction of the heat-shield body 6, and the gas is deflected into the direction of warm-air outlet 11. Thus, the heat-shield body 6 is prevented from being heated by the high-temperature combustion gas 7, and the front board 16 is prevented from being heating to a high temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a configuration of a combustion chamber of a gas hot air heater.

[0002]

2. Description of the Related Art The configuration of a conventional gas hot air heater is shown in FIG. A burner body 1 having a plurality of flame holes arranged in a longitudinal direction,
The supplied gas is burned in a box-shaped burner case 2 having an opening serving as a secondary flame hole on the upper surface of the burner main body 1. A front combustion guide 3 is provided in front of the burner case 2, an upper combustion guide 4 is provided above, and a rear combustion guide 5 is provided in the rear. Reference numeral 6 denotes a heat shield, which is provided from the upper side of the upper combustion guide 4 to the front of the front combustion guide 3. A convection fan 9 is provided below the combustion exhaust gas 7 generated by the combustion and the front combustion guide 3 for mixing the air from the room and the combustion exhaust gas 7 and sending out the warm air 8 to the room. Inhale the air 10. A hot air outlet 11 is mounted in front of the convection fan 9, and a convection filter 13 for taking in convection air 10 is provided on a rear surface of the entire case 12. A thermistor 14 is mounted on the upper surface of the heat shield 6 above the upper combustion guide 4.

Next, the operation will be described. The high-temperature combustion exhaust gas 7 generated by burning gas at the burner holes of the burner main body 1 in the burner case 2 and the convection air 10 that has passed through the convection filter 13 in the ventilation passage 15 outside the front combustion guide 3. Mixed. The mixed hot air is sent out by the convection fan 9 as the hot air 8 from the hot air outlet 11 at the lower front portion of the front plate 16 to heat the room.

[0004] Since the primary burner hole is surrounded by the burner case 2, the secondary air is restricted, and the flame of the primary burner hole extends with an increase in the amount of combustion. Burn.

When the convection filter 13 is clogged with dust, the convection air 10 decreases, the combustion exhaust gas 7 expands, the temperature of the upper surface of the heat shield 6 rises, and the thermistor 14 senses the heat and stops the combustion. Or reduce the amount of combustion.

[0006]

In the above-described configuration in which the front combustion guide 3, the upper combustion guide 4, and the heat shield 6 are provided, if the convection filter 13 is clogged with dust,
There is a problem that the convection air 10 decreases, the high-temperature combustion exhaust gas 7 extends and hits the heat shield 6, and the heat shield 6 becomes high in temperature and heats the front panel 16 by convection and radiation.

[0007]

In order to solve the above-mentioned problems, the present invention has a configuration in which a deflecting heat shield is provided in a ventilation path between the upper surface of a heat shield and an upper combustion guide.

According to this means, even if the convection filter is clogged with dust, the convection air is reduced, and the high-temperature combustion exhaust gas is extended, the direction of the combustion exhaust gas is directed to the hot air outlet by the deflection heat shield plate. Thus, the heat shield is less likely to be hit, and as a result, the temperature of the heat shield is less likely to be high, and the temperature of the front plate can be controlled to be low.

According to the configuration in which the material of the deflection heat shield is made of stainless steel and heat-treated at 550 to 650 ° C., the color of the deflection heat shield changes between a new article and a long-time use due to the heat treatment. If the amount of dust clogging the convection filter from the deflecting heat shield to the upper surface of the heat shield is constant, the combustion can be stopped or reduced by installing a thermistor that controls the combustion. Can be controlled.

When the deflection heat shield plate is provided with a ceramic coating layer, the color of the deflection heat shield plate does not change between a new product and a long-time use due to the ceramic coating layer. If the amount of dust clogging the convection filter from the radiant heat to the upper surface of the heat shield is constant, the combustion can be stopped or reduced by installing a thermistor for controlling the combustion.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has a configuration in which a deflection heat shield is provided between the upper surface of a heat shield and an upper combustion guide.

Even when the convection filter is clogged with dust, the convection air is reduced, and the high-temperature combustion exhaust gas is extended, the direction of the combustion exhaust gas is guided by the deflection heat shield plate toward the hot air outlet. The contact with the heat shield is controlled, so that the temperature of the heat shield does not become high and the temperature of the front plate can be controlled to be low.

The deflection heat shield plate is made of stainless steel, heat-treated at 550 to 650 ° C., and a burner is equipped with a thermistor serving as a device for controlling combustion. The radiant heat from the deflecting heat shield to the upper surface of the heat shield is not changed by the thermistor that controls combustion if the amount of dust clogging the convection filter is constant. It can be shut down or the amount of combustion reduced.

Further, when a ceramic coating layer is applied to the deflection heat shield, the color of the deflection heat shield does not change between a new product and a long-time use due to the ceramic coating layer.
If the amount of dust clogging the convection filter from the deflecting heat shield to the upper surface of the heat shield is constant, the combustion can be stopped or reduced by installing a thermistor for controlling the combustion.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view of a gas hot air heater according to an embodiment of the present invention. Since the basic configuration is the same as that of the conventional example, the description is omitted. In addition, the same reference numerals in the drawings 1 and 2 have the same configuration, and description thereof will be omitted.

Reference numeral 17 denotes a deflection heat shield provided between the upper surface of the heat shield 6 and the upper combustion guide 4. Convection filter 1
When the dust 3 is clogged, the convection air 10 is reduced, and even if the high-temperature combustion exhaust gas 7 is extended, the direction of the combustion exhaust gas 7 is changed to the direction of the hot air outlet 11 by the deflection heat shield plate 17, and the heat shielding is performed. The contact with the body 6 is controlled, so that the temperature of the heat shield 6 does not become high and the temperature of the front plate 16 can be lowered.

(Embodiment 2) The material of the deflection heat shield 17 is made of stainless steel, and a heat treatment at 550 to 650 ° C. is performed. Deflection heat shield plate 1 when new and when used for a long time by heat treatment
The color of 7 does not change, and the radiant heat from the deflection heat shield 17 to the upper surface of the heat shield 6 controls the combustion at the upper part of the heat shield 6 if the amount of dust clogging the convection filter 13 is constant. The combustion can be stopped or the amount of combustion can be reduced by the function of the thermistor 14 attached to the device.

(Embodiment 3) A ceramic coating layer is applied to the deflection heat shield 17. Due to the ceramic coating layer, the color of the deflection heat shield 17 does not change between when it is new and when it is used for a long time, and the radiant heat from the deflection heat shield 17 to the upper surface of the heat shield 6 is the amount of dust clogging the convection filter 13. Is constant, the function of the thermistor 14 attached to the upper part of the heat shield 6 and controlling the combustion can stop the combustion or reduce the amount of combustion.

[0020]

As described above, according to the present invention, since the deflection heat shield is provided between the upper surface of the heat shield and the upper combustion guide, the convection filter is clogged with dust.
Even if the convection air decreases and the high temperature flue gas elongates, the direction of the flue gas is deflected to the direction of the hot air outlet by the deflected heat shield and controlled to hit the heat shield, so the temperature of the heat shield is high. And the temperature of the front panel can be reduced.

Further, since the material of the deflection heat shield plate is made of stainless steel and heat-treated at 550 to 650 ° C., the color of the deflection heat shield plate does not change by heat treatment when it is new and when it is used for a long time. If the amount of dust clogging the convection filter from the deflecting heat shield to the upper surface of the heat shield is constant, the combustion can be stopped or reduced by installing a thermistor that can control the combustion. Can be reduced.

Also, since the deflection heat shield plate is provided with a ceramic coating layer, the color of the deflection heat shield plate does not change between a new product and a long-time use due to the ceramic coating layer. If the amount of dust clogging the convection filter is constant, radiant heat to the upper surface of the heating element should be stopped or reduced by installing a thermistor that can control the combustion of the heat shield. Can be.

[Brief description of the drawings]

FIG. 1 is a sectional view of a gas hot air heater according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional gas warm air heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Burner main body 2 Burner case 3 Front combustion guide 4 Upper combustion guide 6 Heat shield 11 Hot air outlet 14 Thermistor 13 Convection filter 16 Front plate 17 Deflection heat shield plate

Claims (3)

[Claims] 1. A burner body having a primary flame hole for burning gas, a burner case surrounding the primary flame hole and having a secondary flame hole on an upper surface, and a front plate having a warm air outlet below. A heat shield that is located between the front plate and the burner case and controls heat transfer to the plate, a convection filter that passes convection air, and a convection fan that blows warm air to the warm air outlet. A gas hot air heater provided in the entire case, wherein a front combustion guide is provided in front of the burner case, an upper combustion guide is provided in an upper portion of the burner case, and a rear combustion guide is provided in a rear portion of the burner case. The hot air blow-out port is provided between the upper combustion guide and the heat shield, and the combustion exhaust gas flowing from the upper part of the burner case toward the heat shield in a ventilation path through which convection air flows. Bias to turn around and guide A gas hot air heater equipped with a heat shield plate. 2. The gas hot air heater according to claim 1, wherein the deflection heat shield plate is made of stainless steel heat-treated at 550 to 650 ° C., and a thermistor for controlling combustion of the burner body is provided. 3. The gas hot air heater according to claim 1, wherein a ceramic coating layer is provided on the heat shielding deflection plate, and a thermistor for controlling combustion of the burner body is provided.