JPS6093230A - Control device for combustion and feeding of solid fuel - Google Patents

Abstract

PURPOSE:To get positively a desired most appropriate calorie, keep and maintain a stable combustion by a method wherein a desired temperature of a room to be heated and a surrounding air temperature around the room to be heated are compared and an amount of fed solid fuel to a combustion furnace is varied in response to the value of the difference in temperature. CONSTITUTION:A temperature to be held by a room 4 to be heated is set at a desired temperature part 5, and a difference between the set temperature and an output of a surrounding air temperature sensor 7 corresponding to a surrounding air temperature is sensed by a comparison sensor part 4. A difference in temperature is taken out as a variation in time by a voltage time conversion part 9, set as an input for a feeding control part 3 so as to control a feeding interval of the solid fuel is continuously controlled. The voltage time conversion part 9 takes out an output from the comparison sensing part 8, for example, as a variation in frequency by the voltage-frequency conversion part 10 and further it can be taken out through a counting part 11 as a variation in time. That is, when the difference in temperature is high, the fuel feeding interval is short and in turn when the difference in temperature is low, the fuel feeding interval is elongated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a solid fuel combustion input control device for combusting solid fuel and utilizing the combustion heat.

Conventional configuration and its problems In the conventional solid fuel combustion input method, in many cases, it is only necessary to properly input the solid fuel into the combustion furnace and burn it. ,
After that, all that was required was to add solid fuel to continue combustion. Therefore, in many cases, no particular consideration was given to input control, and there was no need for it.

Purpose of the Invention In view of the above-mentioned current state of the art, the present invention provides a solid fuel combustion input control device that can control the amount of fuel input in accordance with the required amount of combustion heat and maintain and continue combustion in a stable state. The purpose is to provide the following.

Structure of the Invention In order to achieve the above object, the present invention compares the set temperature of the room to be heated, which can be set arbitrarily, and the outside air temperature detected by an outside air temperature sensor that detects the outside air temperature around the room to be heated. However, the amount of solid fuel input into the combustion furnace is changed depending on the magnitude of the difference, and with this configuration, the optimum heat required at that time can be reliably obtained.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In the figure, 1 is a combustion furnace in which solid fuel is charged and combusted, and the combustion temperature of this combustion furnace 1 is measured by a combustion temperature sensor 2.
Detected by. Reference numeral 3 denotes an input control unit that controls the input of solid fuel based on the temperature detection output of the combustion temperature sensor 2, etc., and 4 denotes a heating target chamber heated by the combustion heat obtained from the combustion furnace 1; The temperature to be maintained in the chamber 4 can be arbitrarily set by the set temperature section 6. 6
is an outside air temperature detection unit that detects the outside air temperature around the heating target room 4, and the outside air temperature is detected by an outside air temperature sensor 7. Reference numeral 8 denotes a comparison detection unit that compares the set temperature of the set temperature unit 5 and the outside temperature detected by the outside air temperature sensor T, and 9 a voltage/time conversion unit that operates in response to the output signal of the comparison detection unit 8. This voltage/time converter 9 includes a voltage/frequency converter 10 and a voltage/frequency converter 10.
It is composed of a counting section 11 that counts the output from the
By sending the output of the voltage/time converter 9 to the injection control section 3, solid fuel injection control is performed.

The operation in the above configuration will be explained. First, set temperature section 5
arbitrarily set the temperature that the heating target room 4 should maintain, and calculate the difference between the output corresponding to this set temperature and the output corresponding to the outside air temperature detected by the outside air temperature sensor 7 around the heating target room 4. It is detected by the comparison detection section 4. The temperature difference detected here is extracted as a change in voltage. This output is then used as an input to the injection control section 3 to continuously control the injection interval of solid fuel. As described above, as an example of the voltage/time converter 9, the output of the comparison/detector 8 is taken out as a change in frequency using the voltage/frequency converter 1Q, and further taken out as a change in time through the counter 11. Can be done. Note that this voltage-time converter 9 can also be realized by an analog circuit. By performing the above operations, the difference between the outside air temperature and the set temperature is determined, and the fuel injection interval is continuously changed based on the temperature difference. The relationship between the temperature difference and the fuel injection interval is that when the temperature difference is large, the amount of heat required is large, so the fuel injection interval becomes short, and therefore the heat generated11)
, ld increases. Conversely, when the temperature difference is small, the required amount of heat is small, so the fuel input interval becomes longer, and the amount of generated heat is therefore reduced.

In the combustion of solid fuels, unlike liquid or gaseous fuels,
Fuel ignition time is required. Therefore, the ignition time must be taken into consideration when determining the fuel injection interval. When a large amount of fuel is put into the combustion furnace 1 at one time, the ignition time becomes longer, causing a delay in combustion, and as a result, the combustion temperature detected by the combustion temperature sensor 2 of the combustion furnace 1 decreases. If carbon monoxide gas and the like increase, and if combustion starts all at once after ignition, the combustion temperature will rise, and fluctuations in temperature will become large, leading to deterioration of the combustion furnace 1. Therefore, in the combustion of solid fuel, it is important to perform average combustion, and for this purpose, it is necessary to control the fuel injection interval.

Continuously changing the input amount of solid fuel means that
Specifically, it means changing the fuel injection interval as described above, but of course when the form of the fuel becomes smaller or in the case of powder, it is necessary to control the injection amount itself and the fuel injection interval. You can respond by doing so.

Effects of the Invention As described above, according to the present invention, the set temperature of the room to be heated, which can be set arbitrarily, and the outside air temperature detected by the outside air temperature sensor that detects the outside air temperature around the room to be heated, are compared and detected. Since the amount of solid fuel input into the combustion furnace is changed depending on the magnitude of the difference, it is possible to reliably obtain the optimum heat hk required at that time, and as a result, the solid fuel can be used in the most It is capable of effectively burning and maintaining stable combustion.

[Brief explanation of drawings]

The figure is a block diagram of a solid fuel combustion input control device showing an embodiment of the present invention. 1... Combustion furnace, 2... Combustion temperature sensor,
3...Input control unit, 4...Heating target room, 5
... Set temperature vsP, 6 ... Outside temperature detection section, 7 ... Outside air temperature sensor, 8 ... Comparison detection section, 9 ... Voltage/time conversion part, 1o... voltage/frequency conversion part, 11... counting part.

Claims (1)

[Claims] (1) A combustion furnace that charges and burns solid fuel, a combustion temperature sensor that detects the combustion temperature of this combustion furnace, and an input control unit that controls the input of solid fuel based on the temperature detection output of this combustion temperature sensor, etc. , a set temperature section that can arbitrarily set the temperature to be maintained in the heating target room heated by the combustion heat obtained from the combustion furnace, and an outside air temperature sensor that measures the outside air temperature around the heating target room. an outside air temperature detection section that detects; a comparison detection section that compares the set temperature of the setting section with the outside temperature detected by the outside temperature sensor; and a voltage/time conversion section that operates in response to the output signal of the comparison detection section. A solid fuel combustion input control device, characterized in that solid fuel input control is performed by sending the output of the voltage/time converter to the input control unit. ? ) The voltage/time converter includes a voltage/frequency converter;
The solid fuel combustion input control device according to claim 1, further comprising a counter that divides the output from the voltage/frequency converter.