JPH0127008Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention automatically controls the hot air fan motor according to the change in combustion capacity due to capacity switching, so that an appropriate amount of hot air can be obtained. The present invention also relates to a capacity switching type gas combustion heater that can be used as a thermal radiation type heater by stopping air blowing.

[Conventional technology]

Conventionally, hot-air heaters have been proposed in which the combustion heat of a gas burner is converted into electricity using a thermoelectric element in a capacity-switchable stove, which is then supplied to a hot-air fan motor to send out hot air. Since it is necessary to obtain an air volume that corresponds to a change in combustion capacity, a switching device that changes the air volume as the capacity changes is required. In addition, the gas combustion heater can be used as a hot air heater by rotating the hot air fan.
The drawback was that the hot air fan could not be turned off and used as a radiant heater.

[Problem that the invention attempts to solve]

In view of the above points, the present invention automatically controls the hot air fan motor according to the change in combustion capacity due to capacity switching so that an appropriate amount of hot air can be obtained. The purpose is to enable gas combustion heaters to be used for hot air heating and thermal radiant heating.

[Means to solve the problem]

The present invention is a capacity-switchable gas combustion heater that changes the combustion capacity of the gas burner 1 by changing the number of burners 1a, 1b constituting the gas burner 1. A number of thermoelectric elements 6 are arranged facing each other, and the plurality of thermoelectric elements 6 are connected in series to the coil of the hot air fan motor 8, and the electromotive force generated by the thermoelectric elements 6 is connected to the closed circuit. The above-mentioned problem is solved by interposing a selection switch 9 for supplying and disconnecting the wind fan motor 8 to switch between warm air heating and thermal radiant heating.

[Function] When the ignition operation is performed when using the capacity switching type gas combustion heater, gas is supplied to the burner units 1a and 1b of the number corresponding to the "large" or "small" combustion capacity and ignites them. The gas burner 1 starts combustion, and a plurality of thermoelectric elements 6 disposed opposite each other in each burner unit 1a, 1b are heated, and electric power proportional to the combustion area, that is, the amount of combustion heat is generated. Then, selection switch 9
If it is turned on and the hot air heating side is set, the electric power is supplied to the hot air fan motor 8 and the amount of air according to the combustion capacity is blown. When switching the capacity after ignition, the number of burning burners increases or decreases, and the number of thermoelectric elements 6 heated changes accordingly, so the applied voltage also changes proportionally, causing a change in the hot air fan motor 8. The supplied electric power is automatically and proportionally changed, and the hot air fan 7 is controlled so that the optimum air volume is blown.

Next, turn off the selection switch 9 for switching between hot air heating and thermal radiant heating, and set it to the thermal radiant heating side.
Since the supply of electric power to the hot air fan motor 8 is stopped and the hot air fan 7 does not rotate, the capacity switching type gas combustion heater can be used as a heat radiation type heater.

〔Example〕

1 to 5 show an embodiment of the present invention. In FIG. 1, a gas burner 1 is connected to two burner units 1.
a, 1b, these two burners alone 1a,
The gas supply passage 2 is connected to the piping 2a, 2b leading to the gas supply passage 1b so that the gas supply passage 2 is connected to the gas supply passage 2,
A three-way valve 4 for switching the capacity is interposed at the branch point between the two, and a three-way valve 4 for switching the capacity is interposed in conjunction with the capacity switching knob 3, and a control valve (Fig. (not shown), the burner unit 1a,
1b, thermoelectric elements 6 composed of, for example, P-type FeSi ₂ and N-type FeSi _2, etc., are provided facing each other at approximately equal intervals across the entire width, and these plurality of thermoelectric elements 6 are connected in series, and are placed on the back of the gas burner 1. Installed hot air fan 7
It is connected to a hot air fan motor 8 which rotates the hot air fan motor 8.
Reference numeral 9 denotes a selection switch that switches between hot air heating and thermal radiant heating by turning on and off contacts, and is interposed in a closed circuit consisting of the thermoelectric element 6 and the coil of the hot air fan motor 8.

Figures 2 and 3 show that as the hot air fan 7 rotates, air is sucked in through the suction port 11 provided at the bottom of the back of the capacity-selectable gas combustion heater, and the combustion exhaust gas from the combustion of the gas burner 1 is transferred to the top of the front. This is a capacity switching type gas combustion heater that blows out warm air from an outlet 10. In addition, in FIGS. Warm air outlet 1 located below the front for exhaust gas
This is a capacity switching type gas combustion heater that ejects air from 0'.

In the above embodiment, a red-hot plate combustion type gas burner 1 is used, and in this case, the combustion surface of the gas burner 1 has a certain uniform temperature distribution, and there is a risk that the thermoelectric element 6 may be heated above its heat-resistant temperature. It has a long lifespan and is easy to install. Further, the thermoelectric elements 6 whose number is proportional to the combustion area of the gas burner 1 are heated to raise the temperature, thereby obtaining a thermoelectromotive force approximately proportional to the heating capacity of the gas burner 1.

With the above configuration, when the ignition control lever 5 is operated to ignite, the gas supply passage 2 is opened, and when the capacity switching knob 3 is set to "small" capacity, the three-way valve 4 for capacity switching connects the supply passage 2 and the piping 2b to the burner unit 1b. Alternatively, since the pipe 2a to the burner unit 1a is connected, gas is supplied only to the burner unit 1a or the burner unit 1b, and when the capacity is "high", the three-way valve 4 for capacity switching connects the supply passage 2 and the pipe 2a. ,2
b are communicated with each other, gas is supplied to both burners 1a and 1b, and a spark is ignited by an ignition device (not shown).

When gas burner 1 starts combustion, burner 1
Thermoelectric elements 6 disposed opposite a and 1b are heated and generate an electromotive force. The magnitude of this electromotive force is determined by the number of heated thermoelectric elements 6 and the combustion heat, so if the combustion capacity is "large" and both burners 1a and 1b are burned and the combustion area is large, eight thermoelectric elements 6 generates an electromotive force and the electric power becomes large. Conversely, when the combustion capacity is "small" and only one burner unit 1a or burner unit 1b is burned, the thermoelectric element 6 that generates an electromotive force is As the number of units decreases, the power becomes smaller. When using the capacity switching type gas combustion heater as a hot air heater, select switch 9.
When turned ON, the electric power generated by the thermoelectric element 6 described above is supplied to the hot air fan motor 8, and the hot air fan sucks an amount of air according to the combustion capacity through the suction port 11 or 11' and rises from the gas burner 1. A hot air outlet 10 or 1 provided at the upper front (see Figures 2 and 3) or lower front (see Figures 4 and 5) along with the combustion exhaust gas.
Warm air is sent out from 0'. Therefore, when using the capacity switching type gas combustion heater, the capacity switching knob 3
When the combustion capacity is changed by operating the engine, the rotational speed corresponding to the combustion capacity, that is, the appropriate air volume, is automatically controlled and the air is blown.

Above, we have shown an example in which the number of burners 1a, 1b is directly proportional to the number of thermoelectric elements 6 (generated thermoelectromotive force) to obtain an air flow proportional to the combustion capacity of the gas burner, but it is not necessarily necessary to make them directly proportional. ,
The magnitude may be changed as appropriate depending on the relationship between the resistance value of the thermoelectric element and the resistance value of the fan motor coil.

Next, when the selection switch 9 is turned OFF, the electric power generated by the thermoelectric element 6 described above is no longer supplied to the hot air fan motor 8, and the hot air fan 7 does not rotate, and the capacity switching type gas combustion heater becomes a thermal radiation type heater. It can be used to provide directional, concentrated heating.

[Effects of the invention] As mentioned above, the present invention connects a number of thermoelectric elements corresponding to the combustion area in series and connects them to the coil of a hot air fan motor, and also inserts a selection switch in the closed circuit. With this simple structure, even if the combustion capacity changes due to capacity switching, the generated power will automatically change and be supplied to the warm air fan motor, so an appropriate air volume can be obtained, and the rotation of the fan motor will be controlled. This has the effect of eliminating the need for power switching devices such as inverters (frequency converters) for number conversion.
Further, there is an advantage that the capacity switching type gas combustion heater can be used as a hot air heater or a thermal radiation heater simply by operating the selection switch.

[Brief explanation of the drawing]

Figure 1 is a schematic explanatory diagram of a variable capacity gas combustion heater according to the present invention, and Figures 2 and 3 are a sectional view and a front view of a variable capacity gas combustion heater that blows hot air from above the front. Figures 4 and 5 are a cross-sectional view and a front view of a variable capacity gas combustion heater that blows out hot air from below the front surface. 1...Gas burner, 1a, 1b...Burner unit, 6...Thermoelectric element, 8...Hot air fan motor,
9...Selection switch.

Claims (1)

[Scope of claim for utility model registration] A plurality of individual burners 1 constituting the gas burner 1
In a capacity switching type gas combustion heater in which the combustion capacity of the gas burner 1 is changed by changing the number of combustion pieces of the burners 1a and 1b, thermoelectric elements 6 for heat corresponding to the combustion area are provided facing each burner unit 1a and 1b, and A plurality of thermoelectric elements 6 are connected in series and connected to a hot air fan motor 8 installed at the back of the gas burner 1 to form a closed circuit, and the closed circuit is switched between hot air heating and thermal radiation heating. A capacity switching type gas combustion heater characterized in that a selection switch 9 is installed. The capacity switching type gas combustion heater according to claim 1, wherein the gas burner 1 is of a red-hot plate type.