JPH01193558A - Gas-burning hot air heater - Google Patents

Abstract

PURPOSE:To quickly heat the room space when the room temperature is low by increasing the coil current to the gas pressure proportioning valve greater than the normal rated level when the room temperature is lower than a certain set temperature so that the burning rate can be increased. CONSTITUTION:The magnetized fixed iron core 31 functions as a regulator spring of an ordinary gas pressure regulator, and, by modulating the current value, it can function as if the regulator spring were working as being compressed, etc., to regulate the gas pressure. Under normal conditions, the rated coil current Ia is supplied to set the ejection pressure from the nozzle 18 at the rated gas pressure P3, and, when the burner 19 is operated for a low intensity burning to match a higher room temperature, the gas pressure is reduced to Pc so as to decrease the gas flow rate. When the room temperature is lower than a certain optional temperature, the burning control section 21 causes the coil current to increase up to a level Ib which is higher than the rated coil current Ia by DELTAI so that the gas pressure may increase up to a level Pb and the burner 19 may operate at an intensity level higher than the rated intensity by a certain amount.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hot air heater that uses gas fuel as a heat source and obtains heating through forced convection using a fan.

Conventional technology In recent years, hot air heaters, known as fan heaters, burn fuel in a burner and supply the heat into the room using a circulating fan installed in the appliance. Wind heaters are the mainstream.

Hereinafter, the above-mentioned conventional warm air heater will be explained with reference to the drawings. FIG. 6 shows a gas control circuit diagram of a conventional gas hot air heater, and FIG. 7 shows its electric control circuit diagram. Gas cock 1 is linked to switch 2, and when gas cock 1 is opened, switch 2 is turned on.
L, the first solenoid valve 3 and the second solenoid valve 4 are turned on, and the burner 6 is ignited by the ignition control circuit 6. Heat obtained by combustion in the burner 8 is blown into the room by the fan motor 7 to warm the room. The room temperature is detected by the thermistor 8, and the room temperature control block 9 controls the second solenoid valve 4 [ONJ,
``0FFJ control and fan motor 7 to ``strong''
, “weak” switching control. The second solenoid valve 4 is [OF
As shown in the gas control circuit diagram in FIG.
It is sent to ``low'' combustion. Therefore, thermistor 8
The fan motor 7 is configured to detect the room temperature and open/close the second electromagnetic valve 4, and at the same time switch the fan motor 7 between high and low.

Problems to be Solved by the Invention However, in the case of a hot air heater with such a configuration, the gas flow rate for combustion at "strong" is a constant value depending on the diameter of the nozzle/l/13 and the set pressure of the gas pressure regulator 1o. It was set to , and was always constant, regardless of room temperature. Therefore, when the room temperature is low, even if you wanted to warm up the room quickly, it was impossible because the amount of combustion is always constant.

In view of the above-mentioned problems, the present invention provides a gas hot air heater that eliminates the drawbacks of the conventional method by configuring it so that when the room temperature is below a certain temperature, it can burn more than the normal amount of combustion. This is what we provide.

Means for Solving the Problems In order to solve the above problems, the gas hot air heater of the present invention uses a gas pressure proportional valve to control the current value flowing through the coil, and detects the combustion amount of the burner with a thermistor. It is constructed so that it can be controlled in conjunction with the room temperature, and is equipped with a circuit that controls the combustion amount to be greater than the rated combustion for a predetermined period of time when the room temperature is below a certain temperature.

According to the above-mentioned structure, the present invention allows the coil current to flow through the gas pressure proportional valve to be higher than the rated current by a certain constant value when the room temperature is below a certain arbitrary temperature, thereby increasing the gas pressure ejected from the nozzle to the rated value. It is now possible to increase the temperature higher than the previous value, and when the room temperature is low, by burning a larger amount than usual, it is possible to warm up the temperature of the room faster than before.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a gas control circuit diagram in one embodiment of the present invention, and FIG. 2 is its electrical control circuit diagram.

The gas cock 14 is interlocked with a switch 15. When the gas cock 14 is opened, the switch 15 is turned on, the solenoid valve 16 and the gas pressure proportional valve 17 are energized, and the nozzle/L'
Gas flows from the burner 18 to the burner 19, and the burner 19 is ignited by the discharge electrode 20a operated by the ignition control circuit 20, and combustion begins. The heat obtained by combustion in the burner 19 is blown into the room while being mixed with the heat generated by the rotation of the fan motor 22 controlled by the combustion control section 21, thereby warming the room. The room temperature is detected by the thermistor 23, converted into a control signal by the indoor control section 24, and the control signal is sent to the combustion control section 21, which controls the fan motor 22 and at the same time controls the coil current of the gas pressure proportional valve 17. It is constructed so that the amount of combustion and airflow can be varied. The gas pressure proportional valve 17 is constructed as shown in the structural diagram shown in FIG. A valve 26 and a permanent magnet 27 are fixed to the diaphragm 25, and are separated into a primary gas pressure chamber 29 and a secondary gas pressure chamber 3o via a valve seat 28. A fixed iron core 31 is provided above the permanent magnet 27, and around the fixed iron core 31 is a coil/coil.
L/32 is sown, and when a current is passed through the coil 32,
The fixed iron core 31 is magnetized and configured to function as an electromagnet. Therefore, when the fixed iron core 31 becomes an electromagnet, the positive or negative of the coil current is determined so that it repels the permanent magnet 27, and the current value is controlled. In addition, increasing or decreasing the current value has the same effect as compressing or otherwise varying the adjustment spring, making it possible to adjust and vary the gas pressure. Therefore, the present invention uses this gas pressure proportional valve 1 to set the ejection pressure from the nozzle 18 to the rated gas pressure Pa by flowing the rated coil current Ia under normal conditions, as shown in FIG. When the Sipana 6, which has a high room temperature, is to be slightly burned, the coil current is reduced to the IC, thereby reducing the gas pressure to Po and controlling the flow rate to be reduced. Furthermore, when the room temperature is below a certain temperature, the combustion control section 21 is configured so that the coil current flows to Ib, which is greater than the rated coil current Ia by ΔI. Therefore, the gas pressure increases to Pb, and the burner The combustion amount of No. 6 is increased by a certain amount from the rated value.

FIG. 6 is a graph showing the relationship between room temperature and time, which shows the relationship between the temperature rise in the room, and the dotted line shows the conventional temperature rise, and the solid line shows the temperature rise in the case of the present invention. be. Therefore, when the temperature of the room is changed from T2 to T2, the present invention has the effect of making the room rise time faster by (1a-1b) compared to the conventional method.

Effects of the Invention As described above, the present invention uses a gas pressure proportional valve, and when the temperature is below a certain room temperature, the coil/L to this gas pressure proportional valve is
/By increasing the current compared to the normal rated value, the gas pressure is varied and the amount of combustion is increased to cause combustion, so when the room temperature is low, it is possible to warm up the temperature of the room faster than before.

[Brief explanation of the drawing]

Fig. 1 is a gas control circuit diagram showing an embodiment of the gas hot air heater of the present invention, Fig. 2 is an electric control circuit diagram thereof, and Fig. 3 is a gas control circuit diagram showing an embodiment of the gas hot air heater of the present invention. 4 is a cross-sectional view of the pressure proportional valve, FIG. 4 is an IP characteristic diagram showing its control characteristics in terms of the relationship between coil current and gas pressure, and FIG. 5 is a diagram showing the conventional gas hot air heater and the hot air heater of the present invention. Figure 6 is a gas control circuit diagram of a conventional gas hot air heater, and Figure 7 is its electrical control circuit diagram. 17... Gas pressure proportional valve, 19... Burner, 21... Combustion control section (control circuit), 23
...Thermistor. Name of agent: Patent attorney Toshio Nakao and one other person Tooko, 2 Figure 3 '31 0 70 lJU Figure 4 Figure 5

Claims (1)

[Claims] It has a gas pressure proportional valve that adjusts the gas pressure and controls the combustion amount of the burner by controlling the current flowing through the coil, and a control circuit that detects room temperature with a thermistor and controls the current flowing to the gas pressure proportional valve. When the temperature is below a certain room temperature, the control circuit causes the coil current of the gas pressure proportional valve to flow above a certain rated current value for a certain period of time, thereby causing combustion to exceed the rated combustion amount by a certain certain value. Gas hot air heater to control gas pressure proportional valve.