JPS6038831Y2 - Open type gas hot air heater - Google Patents

Description

[Detailed description of the invention] This invention relates to an open type gas hot air heater that continuously adjusts the amount of gas burned within a certain range and changes the amount of convection air according to the amount of gas burned. It is.

Conventional heaters of this type use a two-stage switching system that works in conjunction with a room thermostat to switch the gas combustion amount to high or low, and also switches the air flow to high or low, or alternatively, only the combustion amount is switched to two stages. , keep the air flow constant,
The amount of air blown was switched in two steps while keeping the amount of combustion constant, and both were step-by-step switching methods.

As a result, there were drawbacks, such as a feeling of cold air when the combustion amount was reduced.

In order to eliminate the drawbacks of the conventional example, the present invention continuously adjusts the amount of combustion, that is, the amount of gas supplied to the gas burner, and the amount of air, that is, the rotation speed of the blower, so that the temperature of the hot air is always constant. The present invention provides an open type gas hot air heater that maintains the temperature.

Hereinafter, embodiments will be described in detail with reference to the drawings.

FIG. 1 shows one embodiment of the present invention, in which 1 is a gas burner, 2 is a convection blower, 3 is a hot air outlet, 4 is a discharge electrode, and 5 is a flame rond.

A gas supply path of the gas burner 1 is provided with a gas regulator 7, a gas governor 7 for controlling the flow rate of gas, and a solenoid valve 8.

The gas governor 7 has a structure as shown in FIG. 2, and gas flows from arrow A to arrow B.

9 is a gas governor valve, 10 is a diaphragm, and 11 is a spring.

Further, 12 and 13 are gears that mesh with each other, and 1
4 is an adjustment knob.

When the adjustment knob 14 is rotated, the gears 13 and 14 are rotated, and the opening of the gas governor valve can be adjusted to adjust the gas flow rate.

15 is a variable resistor. FIG. 3 shows an example of a control circuit, in which the same reference numerals as in FIGS. 1 and 2 indicate the same components, and 16 is a power switch;
7 is an ignition switch, 18 is an igniter, 19 is a control circuit, 2
0 is a combustion confirmation lamp.

The power switch 16 and the ignition switch 1 are interlocked with the gas switch shown in FIG.
The variable resistor 15 shown in the figure is connected in series with the convection blower.

Next, the operation will be explained.

When the gas switch is opened, the power switch 16 and the ignition switch 17 are closed, the convection blower 2 rotates, the igniter 18 is operated, and the discharge electrode 4 is discharged.

Further, the solenoid valve 8 opens, gas is supplied to the gas burner 1, and combustion begins.

When combustion starts, the control circuit 19 detects the flame current between the flame rod 5 and the burner 1, and turns on the combustion confirmation lamp 2.
0 is lit and the ignition switch 17 is turned off.

Even when the ignition switch 17 is turned off, the solenoid valve 8 remains on and gas is continuously supplied.

Now, by turning the adjustment knob 14, the flow rate of the gas can be adjusted, and the resistance value of the variable resistor 15 can be changed to change the rotation speed of the convection blower 2.

That is, the pressure on the secondary side of the gas governor 7 (pressure in FIG. 2B)
If the relationship between the resistance value and the resistance value of the variable resistor 15 is set as shown in Fig. 4, the gas pressure increases, and as the gas pressure supplied to the gas burner 1 increases, the resistance value of the variable resistor 15 decreases. The voltage applied to the blower 2 increases, and the rotation speed increases.

Conversely, when the gas pressure decreases, the resistance value of the variable resistor 15 increases and the rotation speed of the convection blower 2 decreases.

Therefore, the relationship between the gas combustion amount 1 and the air blowing amount Q is as shown in FIG. 5, and the combustion amount and the air blowing amount can be proportionally adjusted steplessly within a certain range.

As explained above, with the present invention, the amount of gas burned and the amount of air blown can be continuously adjusted, and the temperature of the hot air can be kept constant. There is an advantage that this will not happen.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, FIG. 2 is a detailed diagram of the main part of FIG. 1, FIG. 3 is a control circuit diagram, and FIGS. 4 and 5 are characteristic diagrams. 1...Gas burner, 2...Convection blower, 6...Gas cock, 7...Gas governor 8...Solenoid valve, 9. ...Gas governor valve, 12.13...Gear, 14...
...Adjustment knob, 15...Variable resistor.

Claims (1)

[Scope of utility model registration request] A gas that adjusts the amount of gas supplied to the gas burner in an open gas hot air heater that mixes high temperature combustion gas generated by a gas burner with indoor circulating air using a convection blower and blows the air from a hot air outlet for heating. A variable resistor is provided for adjusting the voltage applied to the governor and the convection blower, and a means is provided for steplessly adjusting the gas flow rate in the gas governor and the resistance value of the variable resistor in conjunction with each other. An open type gas hot air heater characterized in that the amount of gas burned and the amount of air blown by the convection blower are made proportional.