JPH06201191A - Gas fan heater - Google Patents

Abstract

PURPOSE:To prevent a cold air from generating when the burner is stopped, and only an air blowing is performed, and prevent an uncomfortable feeling from being given to people by providing a section for which a heat accumulating material enclosed panel is used, on the wall surface of an air passage on the rear stream side of the combustion chamber. CONSTITUTION:A part of air which is sucked in from an air suction port 5 enters a combustion chamber 2 as air for combustion, and the remaining air passes through spaces between the combustion chamber 2 and an inner wall (1b), and between the inner wall (1b) and an outer wall (1a), and mixes with a combustion exhaust gas with a high temperature, and is sent out to the outside from an hot air blow-out port 4 by a fan 6. In this case, at one part of the peripheral wall, i.e., (1b) of an air passage A on the rear stream side of the combustion chamber 2, a heat accumulating material enclosed panel 7 is used, and when a gas burner 3 is operated, one part of the heat of the hot air is accumulated in the heat accumulating material. By this method, even when the gas burner is stopped, the hot air is heated by the latent heat of the heat accumulating material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in gas fan heaters.

[0002]

2. Description of the Related Art Generally, a gas fan heater is designed to maintain a room temperature at a set temperature by controlling the opening of a proportional control valve provided in a gas supply passage. This is because when the on / off control is performed, cold air is blown out at the time of off to give a human body an uncomfortable feeling.

[0003]

However, in general, a gas burner has a limit that combustion becomes unstable or incomplete combustion occurs when the gas amount is further narrowed down. Therefore, a certain turndown ratio (maximum gas The ratio of the quantity to the minimum gas quantity) is provided. Therefore, in a room with good heat retention,
When used in a sunny room, the amount of heat required to maintain room temperature is small, so even if the burner is narrowed to the limit, heating may still be excessive. In such a case, once the room has warmed up, the room temperature rises above the set value, resulting in a waste of energy and a person's discomfort.

As a countermeasure, a method may be considered in which the fan is stopped when the burner is stopped when the room temperature rises above the set temperature. However, in order to cool the residual heat of the burner, avoid blowing cold air for a certain period of time. In addition, the convection deteriorates and the temperature distribution in the room becomes non-uniform, and there is a problem with the temperature detecting means at the air inlet. In view of these problems, the present invention does not generate cold air even if the burner is stopped and only the air is blown, and therefore, even if the on / off control is performed to maintain the room temperature at the set temperature, the person feels uncomfortable. It is an object to provide a gas fan heater without fear.

[0005]

A gas fan heater according to the present invention is a gas fan heater of a method of controlling on-off of room temperature, in which a portion using a heat storage material enclosing panel is used on a wall surface of a ventilation passage on a downstream side of a combustion chamber. It is provided.

[0006]

According to the structure of the present invention, since the heat accumulated in the heat storage material is released when the burner is on, the hot air does not drop to room temperature even after the burner combustion is stopped, and therefore the proportional control is performed. In the gas fan heater of the system, the same effect as that in the case where the proportional control valve can be sufficiently narrowed down is achieved, and the room temperature can be maintained at the set temperature without causing discomfort to a person due to the blowing of cold air.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a gas burner according to the present invention. Reference numeral 1 is a gas fan heater body formed by pressing an iron plate, and has a double structure of an outer wall 1a and an inner wall 1b for heat insulation. Further, the gas burner 3 is provided in the combustion chamber 2 provided inside the inner wall 1b. Reference numeral 4 is a warm air outlet, 5 is an air inlet, and 6 is a blower fan. Part of the air sucked from the air inlet 5 enters the combustion chamber 2 as combustion air, and the rest is the combustion chamber 2 and the inner wall 1b. The high-temperature combustion exhaust gas is mixed with the high-temperature combustion exhaust gas through the space and between the inner wall 1b and the outer wall 1a, and is sent out from the warm air outlet 4 by the fan 6. The gas burner 3 is provided with a control valve (not shown) for controlling the fuel gas, and this control valve is on / off controlled by the output of a thermometer (not shown) provided at the air intake port 5. It has become.

A heat storage material enclosing panel 7 is used on a part of the inner wall 1b of the ventilation passage A on the wake side of the combustion chamber 2, and when the gas burner 3 is turned on, the heat storage material heats the hot air. A part of is being accumulated. As the heat storage material, for example, polyethylene glycol having a melting point of 55 ° C. is used, and even when the gas burner is stopped, the warm air is warmed by the latent heat of the heat storage material at a temperature near the melting point. FIG. 2 shows the temperature of the hot air in the configuration of the present invention (solid line).
Compared with the conventional configuration (dotted line) that does not use a heat storage material, the heat accumulated in the storage material is released during combustion even when the burner is stopped. It has the same effect as just reducing the combustion amount of the gas burner. In this embodiment, the case where the temperature control is performed by the on / off control method is shown. Of course, it goes without saying that the effect of the present invention that cold air is not generated at the time of off due to the action of the heat storage material can actually be achieved by using both control methods together after the room temperature has risen to around the set temperature. There is an advantage that the temperature of the wind does not rise and comfortable heating can be obtained.

[0009]

As described above, according to the structure of the present invention, since the turndown ratio of the gas fan heater is limited,
Even when the burner is stopped so that the room temperature does not rise too much,
Since the heat accumulated in the heat storage material is released, the temperature of the warm air does not drop to room temperature, and therefore, the room temperature is always set to the set temperature without generating cold air when off and causing discomfort to people. It has the advantage that it can be maintained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is an operation explanatory view of the above.

[Explanation of symbols]

 1 Gas fan heater main body 2 Combustion chamber 3 Gas burner 4 Hot air outlet 5 Air inlet 6 Fan 7 Heat storage material enclosing panel A Ventilation path

Claims (2)

[Claims] 1. A gas fan heater of a system for controlling room temperature on / off, wherein a portion using a heat storage material enclosing panel is provided on a wall surface of a ventilation passage on the downstream side of the combustion chamber. 2. The gas fan heater according to claim 1, wherein an on / off control system and a proportional control system are used in combination.