JPH01102214A - Combustion type heating apparatus - Google Patents

Abstract

PURPOSE:To enable the interior of a room to be quickly warmed up without causing the lowering of ignition rate and the increase of a firing noise by making a burning amount at a burner larger than its rated burning amount during a predetermined period of time after the firing at the burner has been detected by a flame detecting means, at the primary stage of ignition. CONSTITUTION:As for the igniting time when heating is started, the optimum amounts of gas and air for combustion are fed to a burner 15 at the igniting time, whereby the firing at the burner 15 can be carried out without causing the lowering of an ignition rate as well as the increase of a firing noise. Further, the interior of a room can be quickly warmed up by increasing the burning amount of gas at the burner 15 by ten-odd percent over its rated burning amount during a predetermined period of time after the firing at the burner 15 is detected by a thermocouple 34. In this case, in order to make the burning amount at the burner larger than the rated burning amount, a by-pass, which by-passes a proportional control valve, and a valve, which opens and closes this by-pass, may be used, or such a means as to make the opening degree of the proportional control valve larger than the rated amount may be employed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a combustion type heating device that heats a room by burning fuel such as gas or kerosene.

[Prior Art] When installing this type of heating device, the heating device is selected and installed in consideration of the size of the room in which it will be used and the rated combustion amount.

However, when the room is extremely cold, such as during winter, even if the room is heated with the rated combustion amount, the room temperature rises slowly and it takes time for the room to warm up.

Therefore, there is a demand for a heating device that warms a room more rapidly than conventional combustion-type heating devices by increasing the amount of combustion in the burner than the rated combustion amount only during a predetermined period of time at the initial stage of ignition.

[Problems to be solved by the invention] However, if a large amount of fuel or combustion air is sent to the burner at the ignition timing, the ignition rate decreases and a large ignition noise is generated at the time of ignition. Ta.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to prevent the ignition rate from decreasing and the ignition noise from increasing.
To provide a combustion type heating device that can rapidly warm up a room compared to conventional combustion type heating devices.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a combustion type comprising a burner that burns fuel and a combustion amount control device that controls the amount of fuel burned in the burner. In the heating device, the combustion amount control device includes flame detection means for detecting the flame of the burner, and controls the burner for a predetermined period of time after the flame detection means detects ignition in the burner at an initial stage of ignition. The technical means is to make the combustion amount of the fuel larger than the rated combustion amount.

[Operation and Effects of the Invention] The present invention having the above-mentioned configuration controls the combustion amount in the burner by the action of the combustion amount control device for a predetermined period of time after the flame detection means detects ignition in the burner at the initial stage of ignition. Increase the rated combustion rate.

As a result, the ignition is performed using the optimal fuel and combustion air at the time of ignition, which reduces the ignition rate and increases the ignition noise. can be heated to.

[Example] Next, a combustion type heating device of the present invention will be described based on an example shown in the drawings.

FIG. 1 shows a schematic configuration diagram of a gas combustion hot air heating device to which the present invention is applied.

The gas combustion type warm air heating device of this embodiment is an indoor open type (generally called a gas fan heater) that burns air sucked in from the room and blows the combustion gas back into the room.

This gas combustion hot air heating device introduces indoor air,
A combustion air circulation path 10 that burns the introduced air and blows combustion gas back into the room; a gas supply path 20 that supplies gas into the combustion air circulation path 10; and the combustion air circulation path 10 and the gas supply path. 20 and a combustion amount control device 30 that controls the combustion amount of gas.

The above-mentioned combustion air circulation path 10 includes an indoor air intake port 12 equipped with an air filter 11 that introduces air from inside the room, and an indoor air intake port 12 that sucks air from the indoor air intake port 12, and the air inside the combustion air circulation path 10 and combustion air. Blower 13 for gas flow
, a gas mixing chamber 14 that mixes air and gas, and a gas burner 1 that burns gas above this gas mixing chamber 14.
5, a mixing chamber 16 that mixes the combustion gas burned in this gas burner 15 and indoor air, and 11 that blows out the air heated to high temperature in this mixing chamber 16 as warm air! It consists of an air outlet 17.

The gas supply path 20 includes a gas jet nozzle 21 that jets gas into the gas mixing chamber 14 of the combustion air circulation path 10, a gas supply pipe 22 that guides the gas to the gas jet nozzle 21, and an upstream side of the gas supply pipe 22. A main valve 23 is provided on the side and is opened and closed by energization and de-energization, a safety valve 24 is provided downstream of this main valve 23 and is opened and closed by energization control like the main pulp 23, and a safety valve 24 is provided downstream of this safety valve 24. A governor valve 25 is provided to regulate the gas pressure; a proportional control valve 26 is provided downstream of the governor valve 25 and has a variable opening degree depending on the amount of electricity supplied; A first gas bypass 21 has a flow rate adjustment screw 27a that allows a certain amount of gas to flow out from upstream of the proportional control valve 26 to the gas jet nozzle 21, and like this first gas bypass 27, gas is jetted from upstream of the proportional control valve 26. It consists of a second gas bypass 28 that bypasses gas to the nozzle 21, and a rapid heating valve 29 that is provided on this second gas bypass 28 and is opened and closed by energization control, and when the proportional control valve 26 is fully opened. The amount of gas burned in the gas burner 15 becomes the rated combustion amount, the proportional control valve 26 is fully opened, and the rapid heating valve 29 is opened, so that the amount of gas burned in the gas burner 15 becomes the rated combustion amount. For example, it is set to be larger by more than ten percent.

The combustion amount control device 30 is operated by a user,
An operation switch 31 that sets the start and stop of the gas combustion hot air heating device, a room temperature setting means (for example, a temperature control volume) 32 that is set by the user, a room temperature detection means (for example, a thermistor) 33 that detects the indoor temperature, Burner 1
5, an ignition electrode 35 that receives a signal from a thermocouple 34, which is a flame detection means of the present invention that detects the combustion state of the flame above the burner 15, and blows sparks on the combustion surface of the burner 15, the blower 13, and the main valve 23. , the safety valve 24, the proportional control valve 26, the rapid heating valve 29, and the like.

The combustion amount control device 30 of this embodiment is an electronic control circuit using a microcomputer, and when the device is plugged into a commercial power source (not shown), the combustion amount control device 30 of the present embodiment is configured to control the amount of combustion regardless of the setting state of the operation switch 31. It receives electricity without any need for electricity.

Next, the main control portion by the combustion amount control device 30 according to the present invention will be explained based on the flowchart of FIG. 2.

When the operation switch 31 is turned on and heating operation is started, in step S1, after pre-purging is performed by forced air blowing from the blower 13, spark discharge and spark detection are performed by the ignition electrode 34, and the main valve 23 and safety valve 24 are At the same time, the proportional control valve 26 is opened with a delay, and the burner 15 is ignited.

Next, in step S2, it is determined whether the output voltage of the thermocouple 34 has reached a flame detection voltage (for example, 12 mV).

If the determination result in step S2 is NO, it is determined in step S3 whether or not it is within a predetermined time (for example, within 8 seconds) after the start of the heating operation. If the result of this determination is YES, the process returns to step S2, and if the result is NO, the heating operation is stopped.

Further, if the determination result in step S2 is YES, in step S4, subtract the room temperature detected by the room temperature detection means 33 from the set temperature set by the room temperature setting means 32, and check whether the difference is, for example, 5° C. or more. Make a judgment as to whether or not. If the determination result is NO, normal heating operation without rapid heating is performed in step S5. Further, if the determination result in step S4 is '/ES, it is determined that the room to be heated is cold, and in step S6, it is determined whether or not it has been within, for example, 15 minutes after the start of the heating operation.

If the judgment result is NO, the process proceeds to step S5, and if the judgment result is YES, in step S7, the proportional control valve 26 is fully opened, the rapid heating valve 29 is opened, and the blower 13 is operated at maximum. Rapid heating is performed, and then the process returns to step S4.

As shown in the above embodiment, at the time of ignition at the start of heating, the optimum gas and combustion air are sent to the burner 15 at the time of ignition, so the burner 15 is not ignited which causes a decrease in the ignition rate and an increase in ignition noise. can be done. By using the thermocouple 34 to increase the amount of gas burned in the burner 15 for a predetermined period of time after detecting ignition in the burner 15 by more than ten percent than the rated combustion amount, the conventional combustion heating system It can heat up the room quickly compared to

In addition, as a means to increase the combustion amount of the burner larger than the rated amount, we used a bypass that bypasses the proportional control valve and a valve that opens and closes this bypass. This may be done by the following means.

Although we have shown an example of using a computer as a combustion amount control device,
It goes without saying that an analog electric circuit using transistors, operational amplifiers, etc. may be used.

−〇 − In addition, in this example, air sucked from indoors is combusted,
Although we have shown as an example an indoor open-type combustion heating device that blows combustion gas back into the room, there are also FF-type combustion heating devices that exchange heat between the combustion gas and indoor air and release the combustion gas outdoors.
It may also be applied to an air conditioner type combustion heating device incorporating a refrigeration cycle.

Further, although an example in which gas is used as the fuel has been shown, the present invention may also be applied to a heating device that burns other fuels such as kerosene.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a gas combustion temperature mw heating device, and FIG. 2 is a flowchart showing the main parts of the present invention programmed into the combustion amount control device.

Claims (1)

[Scope of Claims] A combustion heating device comprising a burner that burns fuel and a combustion amount control device that controls the amount of fuel burned in the burner, wherein the combustion amount control device controls the flame of the burner. The burner is provided with a flame detection means for detecting ignition, and the combustion amount in the burner is made larger than the rated combustion amount for a predetermined time after the flame detection means detects ignition in the burner at the initial stage of ignition. A combustion type heating device featuring: