JPH08480U - Heating appliances - Google Patents

Abstract

(57) [Summary] [Purpose] To suppress combustion noise and odor at the initial stage of ignition. [Configuration] Upon ignition, the thermal power determination means 14 determines thermal power from the room temperature and the set temperature detected by the thermistor 12. When the determined thermal power is larger than the predetermined thermal power, the gradual increase means 16 operates to gradually increase the thermal power from the initial thermal power to the determined thermal power. When the temperature is close to the initial heating power, the outflow speed of the premixed gas is slow, and therefore the lifting combustion is not performed. As a result, the burner 8 is heated and the temperature of the premixed gas is also increased to start the combustion satisfactorily.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vaporization type heating appliance having improved combustibility in the initial stage of ignition.

[0002]

[Prior art]

 Conventionally, for example, in an oil fan heater as this kind of heating appliance, a vaporized gas of fuel is jetted to a burner and ignited, and at the same time, it is burned with a thermal power determined based on a difference between room temperature and a set temperature. Has become.

[0003]

[Problems to be solved by the device]

 By the way, in most cases, the heating appliances as described above are operated when the room temperature is equal to or lower than the set temperature, so that the heating appliances start burning at the maximum thermal power. In the short time after ignition, the temperature of the vaporized gas and the jetting speed are unstable, and the burner itself is also low in temperature. May cause odor. The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a heating appliance that suppresses combustion noise and odor at the initial stage of ignition.

[0004]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention provides a burner, a nozzle for ejecting vaporized gas of fuel oil to the burner, a flame detection electrode for detecting that the burner has ignited, a temperature sensor for detecting room temperature, and a room temperature. With the thermal power determination means that determines the thermal power based on the difference with the set temperature, and the gradually increasing means that operates at the same time as ignition is detected and gradually increases the thermal power to the determined thermal power, the determined thermal power It is configured to include a combustion continuation means for burning.

[0005]

With the above-described configuration, the heating power is suppressed to a small level immediately after ignition, and the speed of the premixed gas flowing out from the burner becomes slow, so that lifting is prevented. Then, the burner rapidly rises in temperature with combustion, the premixed air temperature also rises, and the combustion continues to be good, so that the combustion noise and odor at the initial stage of ignition can be effectively suppressed.

[0006]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In FIG. 1, reference numeral 1 is a tank in which a pulse drive type pump 2 is provided. The pump 2 communicates with the carburetor 4 via the oil feed pipe 3. The carburetor 4 is provided with a heater 5, and a nozzle 7 which is opened and closed by a valve rod 6 is formed at one end thereof. Reference numeral 8 is a burner, and the ignition electrode 10 and the ends of a flame detection electrode 11 for detecting ignition are located on the crater 9.

Reference numeral 12 is a thermistor as a temperature sensor for detecting room temperature, and 13 is a microcomputer. The microcomputer 13 has a thermal power determination means 14 for determining the thermal power of the burner 8 from the difference between the room temperature and a preset temperature set by the user, a combustion continuation means 15 for burning the burner 8 with the determined thermal power, and at the same time ignition is detected. The gradually increasing means 16 and the like for gradually increasing the heating power to the operationally determined heating power are configured, and the gradually increasing means 16 operates particularly when the determined heating power is the maximum.

Further, 17 is a temperature detecting element for detecting the temperature of the carburetor 4, and 18 is a solenoid for sliding the valve rod 6.

The operation of the above configuration will be described. When the operation is performed, the heater 5 is energized to preheat the carburetor 4. When the temperature detecting element 17 detects that the temperature of the vaporizer 4 has risen and has reached a temperature sufficient to vaporize the fuel oil, the solenoid 18 slides the valve rod 6 to open the nozzle 7, and the pump 2 The fuel oil is pumped to the carburetor 4 by the start of. Then, the fuel oil is heated in the vaporizer 4 to become vaporized gas, which is ejected from the nozzle 7 to the burner 8. Therefore, a premixed gas mixture of vaporized gas and primary air flows out onto the crater 9 for ignition. The electrode 10 is ignited by the discharge, and the discharge is stopped when the flame detection electrode 11 detects the ignition.

When the discharge is stopped, the thermal power determination means 14 determines the thermal power of the burner 8 from the room temperature and the set temperature detected by the thermistor 12. Moreover, since the gradually increasing means 16 operates when the determined thermal power is the maximum thermal power, after ignition, as shown in FIG. 2, the thermal power gradually increases from the initial thermal power FO to the maximum thermal power over several minutes. Go. The initial thermal power FO may be any of a predetermined medium to small thermal power or a thermal power obtained by subtracting an appropriate constant value from the maximum thermal power. When the thermal power reaches the maximum thermal power, the gradually increasing means 16 is stopped at this time, and the combustion continuing means 15 operates instead to shift to normal combustion.

Now, when the operation of the above-mentioned gradually increasing means 16 is started, it is a medium to small thermal power, the amount of vaporized gas is small, and the outflow rate of the premixed gas is slow, so that the flame is in a combustion state in close contact with the crater 9. Present. Then, the crater 9 is heated to a high temperature, and the heat transfer from the burner 8 rapidly raises the temperature of the entire burner 8 to raise the temperature of the premixed gas. Therefore, even if the heating power becomes large thereafter, complete combustion is continued. In other words, by burning as described above, lifting does not occur regardless of whether the room temperature is high or low, and therefore combustion noise and odor at the initial stage of ignition can be effectively suppressed.

Further, since lifting is more likely to occur when the room temperature is lower, a configuration in which the gradually increasing means 16 has a function of changing the initial thermal power FO according to the room temperature is also useful. Explaining this with reference to Fig. 3, for example, when the room temperature is as high as about 10 ° C, combustion can be performed relatively well, so after ignition, the thermal power is gradually increased from the initial thermal power FO1 of about intermediate thermal power to finally burn the maximum thermal power. Move to. Further, when the room temperature is low, for example, -5 ° C, the thermal power is gradually increased from the initial thermal power FO2 smaller than FO1. By changing the initial thermal power according to the room temperature in this way, in addition to preventing lifting as described above, the time until combustion of the determined thermal power can be effectively shortened.

[0013]

[Effect of device]

 As described above, the heating apparatus of the present invention has the following effect because it has the gradually increasing means for operating at the same time as ignition and gradually increasing the heating power up to the determined heating power. That is, immediately after ignition, the heating power is suppressed to a low level, the speed of the premixed gas flowing out of the burner slows down, and lifting combustion does not occur.Furthermore, the burner rapidly rises in temperature with combustion, and the premixed gas temperature also rises. As the temperature rises and good flammability is maintained, combustion noise and odor at the initial stage of ignition can be effectively suppressed.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a heating appliance according to an embodiment.

FIG. 2 is a diagram illustrating an example in which the heat power increases to the maximum heat power after ignition.

FIG. 3 is a diagram illustrating an example in which the heating power increases to the maximum heating power after ignition at each room temperature.

[Explanation of symbols]

 7 Nozzle 8 Burner 11 Flame Detecting Electrode 12 Temperature Sensor (Thermistor) 14 Thermal Power Determining Means 15 Combustion Continuing Means 16 Gradual Increasing Means

Claims (3)

[Scope of utility model registration request] 1. A burner, a nozzle for ejecting a vaporized gas of fuel oil to the burner, a flame detection electrode for detecting ignition of the burner, a temperature sensor for detecting room temperature, and a difference between the room temperature and a set temperature. A thermal power determination means for determining the thermal power based on the above, an increasing means for operating at the same time when the ignition is detected to gradually increase the thermal power to the determined thermal power, and a combustion continuation means for burning with the determined thermal power. Prepared heating equipment. 2. The heating appliance according to claim 1, wherein the gradually increasing means operates when the determined heating power is the maximum heating power. 3. The heating appliance according to claim 1 or 2, wherein the gradually increasing means changes the heating power at the start of operation in accordance with the room temperature.