JPH06159673A - Warm air heater - Google Patents

Abstract

PURPOSE:To enhance certainty of ignition by operating a solenoid pump before vaporized gas is injected from a vaporizer to make concentration of injected gas uniform. CONSTITUTION:A solenoid pump 2 is operated before vaporized gas of a vaporizer by an operation of a solenoid 4 is started to be injected, and when the solenoid 4 is operated to start to inject the vaporized gas from a vaporized gas injection port, the vaporized gas of uniform concentration is injected. A warm air fan 6 is started to be operated after a short time. Whether a combustion flame is detected or not is decided through a flame detector 7, and when the presence of flame is decided, the igniter 5 is stopped while the operations of an evaporator heater 3, the fan 6 and the pump 2 are continued, and an operation for heating is transferred. Thus, certainty of ignition is enhanced, and generation of white smoke due to failure of the ignition can be suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warm air heater, which improves ignition performance by improving an ignition sequence and also improves safety.

[0002]

2. Description of the Related Art The outline of a conventional structure will be described with reference to FIGS.

When the operation switch 1 is turned on, the controller 8 composed of a microcomputer operates the carburetor heater 3 and operates the solenoid 4 to close the vaporized gas ejection port of the carburetor, and the carburetor temperature. At the same time that the ignition is ready (ignition command) such that
To open the vaporized gas ejection port of the vaporizer, then activate the electromagnetic pump 2 and activate the igniter 5,
In addition, the hot air fan 6 is started to operate, and it is determined whether the combustion flame is detected by the flame detector 7.

When it is determined that there is a frame,
While continuing the operations of the carburetor heater 3, the warm air fan 6 and the electromagnetic pump 2, the igniter 5 is stopped to shift to the operation for heating, while when it is determined that there is no frame, the warm air fan 6 is stopped. Then, the solenoid 4 is operated to close the vaporized gas ejection port of the carburetor to completely stop the operation of the warm air heater.

[0005]

However, in the case of this conventional example, at the same time as the ignition command (completion of ignition preparation), the solenoid 4 is operated to open the vaporized gas ejection port of the carburetor and start the operation of the electromagnetic pump 2. Therefore, the concentration of the vaporized gas to be ejected is low at the beginning and then gradually increases, so that it may not be instantly ignited, and ignition may be performed while emitting white smoke in the room. In addition, in the case where it is determined that there is no flame due to an erroneous ignition, white smoke continues to be emitted indoors while the electromagnetic pump 2 is operating. Therefore, it was important to keep the concentration of the vaporized gas to be jetted constant.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an operation switch for generating a heating operation start signal, and an electromagnetic pump for supplying liquid fuel to a carburetor. A vaporizer heater for heating the vaporizer,
A solenoid that opens and closes the vaporized gas outlet of the vaporizer, an igniter that ignites the vaporized gas ejected from the vaporizer, a warm air fan that expels the high-temperature gas generated by the combustion of the vaporized gas into the heating indoor space, and a combustion frame. A flame detector for detecting, and the activation of the carburetor heater performed when the operation switch is turned on, the activation of the electromagnetic pump and the igniter, the activation of the vaporized gas of the carburetor by the activation of the solenoid, In the heating operation control based on the activation of the warm air fan and the determination of the presence / absence of the frame through the frame detector, control is performed to activate the electromagnetic pump prior to the start of the vaporized gas injection of the vaporizer by the operation of the solenoid. A hot air heater is configured with the control device.

[0007]

With this configuration, when the operation switch is turned on, the control device starts the operation of the electromagnetic pump prior to the start of the vaporized gas injection of the carburetor by the operation of the solenoid, and the emission of the vaporized gas The conditions for uniform concentration are adjusted, and then the solenoid is activated to start ejection of vaporized gas from the vaporizer.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1, 2 and 3. Note that FIG. 3 is also used in the description of the conventional example, and only the operation sequence is different, and the others are common.

In each drawing, 1 is an operation switch for generating a heating operation start signal, 2 is an electromagnetic pump for supplying liquid fuel to the vaporizer, 3 is a vaporizer heater for heating the vaporizer, 4
Is a solenoid that opens and closes the vaporized gas outlet of the vaporizer, 5 is an igniter that ignites the vaporized gas that is ejected from the vaporizer, 6 is a hot air fan that expels the hot gas generated by combustion into the heating indoor space, and 7 is combustion A flame detector for detecting flames, 8 is a controller for controlling the operation of the hot air heater, and 9 is a power supply.

In this structure, when the operation switch 1 is turned on, the controller 8 starts the operation of the carburetor heater 3 and then the solenoid 4 to close the vaporized gas ejection port of the carburetor. In that state, the electromagnetic pump 2 is activated to increase the internal pressure of the carburetor, and at the same time, the igniter 5 is activated, and the solenoid 4 is activated to the place where the pressure increase and the igniter operation are performed. Open the vaporized gas jet. That is, when the electromagnetic pump 2 is activated before the ejection of vaporized gas from the vaporizer by the operation of the solenoid 4 and the solenoid 4 is activated and ejection of vaporized gas from the vaporized gas outlet is started, a uniform concentration is obtained. The vaporized gas of is to be ejected. And after a while, the hot air fan 6 is started to operate. Then, it is determined whether or not the combustion flame is detected through the flame detector 7, and when it is determined that the flame is present, the igniter 5 is stopped while the operations of the carburetor heater 3, the warm air fan 6 and the electromagnetic pump 2 are continued. Then, the operation is changed to heating. On the other hand, when it is determined that there is no frame, the solenoid 4 is operated to close the vaporized gas ejection port of the vaporizer, and the warm air fan 6 is stopped to completely stop the operation of the warm air heater.

The configuration of the embodiment is as described above. Before the solenoid 4 is operated to open the vaporized gas ejection port of the vaporizer, the electromagnetic pump 2 is started to operate so that the concentration of the vaporized gas ejected is uniform. By adjusting the conditions to be like this, it was possible to greatly improve the certainty of ignition.

[0012]

As described above, according to the present invention, when the vaporized gas is ejected from the vaporizer, the electromagnetic pump operates before that, so that the concentration of the gas becomes uniform and the certainty of ignition is increased. It is extremely effective in suppressing the generation of white smoke due to the failure of.

[Brief description of drawings]

FIG. 1 is a flowchart of an ignition sequence according to an embodiment of the present invention.

FIG. 2 is a timing chart of an ignition operation according to an embodiment of the present invention.

FIG. 3 is a schematic view of the configuration of a warm air heater used for explaining the present invention as well as a conventional example.

FIG. 4 is a flowchart of a conventional ignition sequence.

FIG. 5 is a timing chart of an ignition operation of a conventional example.

[Explanation of symbols]

 1 Operation Switch 2 Electromagnetic Pump, 3 Vaporizer Heater 4 Solenoid 5 Igniter 6 Warm Air Fan 7 Frame Detector 8 Controller

Claims (1)

[Claims] 1. An operation switch (1) for generating a heating operation start signal, an electromagnetic pump (2) for supplying liquid fuel to a vaporizer, a vaporizer heater (3) for heating the vaporizer, and a vaporizer. A solenoid (4) for opening and closing the vaporized gas ejection port of
An igniter (5) for igniting vaporized gas ejected from the vaporizer
The hot air fan (6) for discharging the high temperature gas generated by the combustion of the vaporized gas into the heating room space, the flame detector (7) for detecting the combustion flame, and the operation switch were turned on. Sometimes the activation of the carburetor heater, the activation of the electromagnetic pump and the igniter, the activation of the vaporized gas of the carburetor by the operation of the solenoid, the activation of the warm air fan and the flame detector In the heating operation control based on the presence / absence of the frame, a control device (8) for controlling to start the operation of the electromagnetic pump before the start of the vaporized gas injection of the carburetor by the operation of the solenoid is configured. A warm air heater characterized by being installed.