JPH062058U - Hot air heater - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to effectively heat the entire room even if the amount of air blown by the blower becomes weak, and prevent the combustion flame from blowing out from the outlet even during abnormal combustion. The purpose is to provide a hot air heater. [Structure] A movable louver 11 is provided at an outlet 8 of a main body 1 so as to be vertically swingable, and the movable louver 11 is provided with a blower 7
Incline downward as the amount of air blown by becomes weaker. When the abnormal flame detection device 23 detects the combustion flame, the movable louver 11 is changed to an angle close to the fully closed state, and the outlet 8 is closed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a warm air heater that uses, for example, oil as a fuel.

[0002]

[Prior art]

 The structure of the conventional warm air heater is shown in FIG. In the figure, reference numeral 1 denotes a main body, and inside the main body 1, an electromagnetic pump 2, a carburetor 3, a combustion section 4, a blower 7, etc. are provided.

The vaporizer 3 vaporizes petroleum fuel supplied from a fuel tank (not shown) via an electromagnetic pump 2 as a fuel supply means. The vaporized gas vaporized by the vaporizer 3 is burned by a combustion unit 4 To be supplied to.

The combustion section 4 burns vaporized gas supplied from the vaporizer 3 to generate combustion gas. The combustion gas generated in the combustion section 4 is taken into the main body 1 by the blower 7. The air is mixed with the heated air to become heated air, which is blown to the outside from the blowout port 8 formed on the front surface of the main body 1. The combustion section 4 includes a burner 5 and an ignition heater 6 that ignites the burner 5.

By the way, in the warm air heater configured as described above, the indoor temperature is detected by a temperature sensor such as a thermistor, and when the indoor temperature is higher than the set temperature, for example, the combustion unit 4 and the blower 7 are operated. By switching the operation mode from the strong combustion / strong air volume mode to the weak combustion / weak air volume mode, the indoor temperature is maintained at the set temperature.

[0006]

[Problems to be solved by the device]

 As described above, in the conventional warm air heater, the fixed louver 9 is horizontally fixed to the outlet 8, so that when the combustion mode is switched from the strong combustion / strong air volume mode to the weak combustion / weak air volume mode. The heated air rises as soon as it leaves the outlet 8, making it difficult to blow the heated air far along the floor surface. Therefore, conventionally, there is a problem that the heating effect is deteriorated when the operation mode is switched from the strong combustion / strong air volume mode to the weak combustion / weak air volume mode.

Further, although the combustion state is detected by the flame sensor 28 during combustion, there is not much difference in flame current between normal combustion and abnormal combustion such as oxygen deficiency. It was difficult to detect an abnormal condition only by detecting.

Therefore, the present invention eliminates the above-mentioned drawbacks and can effectively heat the entire room even when the amount of air blown by the blower is switched from relatively strong to weak, and abnormal conditions such as oxygen deficiency can be achieved. It is an object of the present invention to provide a hot-air heater that can detect air more quickly.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the present invention, a main body having an outlet on the front surface, a combustion unit provided in the main body for burning fuel to generate combustion gas, and a combustion unit generated in the combustion unit An air blower that mixes gas with the air taken in the main body and blows air from the outlet, an indoor temperature detecting unit that detects an indoor temperature outside the main body, and a vertical swingable unit provided at the outlet. When the indoor temperature detected by the movable louver and the indoor temperature detecting means is higher than a set temperature, the thermal power of the combustion section and the air flow rate of the blower are controlled to switch from relatively strong to weak, and the movable louver is The blower has a control means for inclining downward as the amount of blown air becomes weaker, and an abnormal flame detection device for detecting the combustion flame blown out from the opening of the burning section. Is obtained so as to drive the movable louver almost completely closed so the air outlet and detecting the.

[0010]

[Action]

 In such a structure, the movable louver inclines downward as the amount of air blown by the blower becomes weaker, so that the direction of the heated air blown from the outlet can be directed to the floor surface. As a result, the heated air does not rise as soon as it leaves the outlet, but it is possible to blow the heated air to a distance along the floor surface, effectively heating the entire room. it can.

Further, when the abnormal flame detection device detects that the combustion flame blows out from the opening of the combustion section, the movable louver becomes an angle close to a fully closed state. Can be prevented from blowing out.

[0012]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

1 to 7 show an embodiment of the present invention, FIG. 1 is a schematic sectional view of a petroleum fan heater according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view in the vicinity of an outlet of the heater. It is a figure. 1 and 2, 1 is a main body, 2 is an electromagnetic pump, 3 is a carburetor, 4 is a combustion part, 5 is a burner, 6 is an ignition heater, 7 is a blower, and 8 is an outlet. Is the same as the conventional one shown in FIG.

Reference numeral 10 a denotes a first louver drive shaft horizontally provided above the outlet 8 and 10 b denotes a second louver drive shaft horizontally provided below the outlet 8. A movable louver 11 is attached to each of the shafts 10a and 10b. The movable louver 11 is for adjusting the direction of the heated air blown from the outlet 8 and is vertically swingable about the louver drive shafts 10a and 10b.

The movable louver 11 is oscillated by a louver drive mechanism 12 as shown in FIG. The louver drive mechanism 12 is composed of a motor 13 and transmission members 15a and 15b that transmit the rotation of the motor 13 to the louver drive shafts 10a and 10b. The transmission members 15a and 15b move vertically when the motor 13 rotates. It is designed to move up and down. When the transmission members 15a and 15b move up, the louver drive shafts 10a and 10b rotate counterclockwise, for example, and when the transmission members 15a and 15b move down, the louver drive shafts 10a and 10b rotate clockwise. Growling.

Reference numeral 16 denotes an indoor temperature detecting thermistor that detects an indoor temperature outside the main body 1. A signal output from the indoor temperature detecting thermistor 16 is input to the control unit 17 shown in FIG. It has become.

Based on the signal from the indoor temperature detecting thermistor 16, the control unit 17 sets the operation modes of the combustion unit 4 and the blower 7 to the strong combustion / strong air volume mode, medium combustion / medium air volume mode, weak combustion / weak air volume mode. And the position of the movable louver 11 is switched and controlled according to the operation modes of the combustion unit 4 and the blower 7. For example, the operation modes of the combustion unit 4 and the blower 7 are strong combustion and strong air flow. In the mode, the movable louver 11 is tilted downward by θ ₁ (for example, 10 to 20 °) as shown in FIG. 2, and in the medium combustion / medium air volume mode, the movable louver 11 is downwards in θ ₂ (for example, 40 to 50 °). In the weak combustion / weak air volume mode, the movable louver 11 is inclined downward by θ ₃ (for example, 70 to 80 °).

Further, 18a and 18b shown in FIG. 3 are louver angle detection switches for detecting the inclination angle of the movable louver 11, and these louver angle detection switches 18a and 18b are turned on at the timing shown in FIG. It is designed to switch from the state to the OFF state. That is, when the movable louver 11 changes from the inclination angle of θ _{1 to} the inclination angle of θ ₂ , the louver angle detection switch 18a switches from the ON state to the OFF state, and the movable louver 11 changes from the inclination angle of θ ₂ to θ _{2. When} the inclination angle changes to _3, the louver angle detection switch 18b switches from the ON state to the OFF state. When the movable louver 11 changes from the inclination angle of θ _{3 to} the inclination angle of θ ₁ , the louver angle detection switches 18a and 18b are switched from the OFF state to the ON state.

The louver angle detection switches 18a and 18b have leaf springs 19 for contact opening and closing abutting on the peripheral surfaces of the cam plates 20a and 20b, respectively, as shown in FIG. These cam plates 20a, 20b are attached to the rotary shaft 14 of the louver drive motor 13 described above, and louver angle detecting switches 18a, 18b are provided on the peripheral surface of each cam plate 20a, 20b. A cutout 21 is formed for switching from ON to OFF and from OFF to ON.

Reference numeral 22 is a blower duct formed in the upper portion of the combustion section 4, and the blower duct 22 is provided with an abnormal flame detection device 23. The abnormal flame detection device 23 detects a combustion flame (not shown) blown out from the opening 4a of the combustion unit 4, and the signal output from the abnormal flame detection device 23 is input to the control unit 17. ing. In FIG. 4, 24 is a combustion switch, 25 is a temperature setting switch, 26 is a carburetor temperature detecting thermistor, 27 is a carburetor heater for heating the carburetor 3, and 28 is a frame sensor.

6 and 7 are flowcharts showing the control operation of the control unit 17, and when the combustion switch 24 is turned on in the control unit 17 as shown in FIG. 6, a heater heat generation signal is sent to the carburetor 3. The petroleum fuel sent out and supplied from the fuel tank (not shown) to the vaporizer 3 is heated to a predetermined temperature by the vaporizer heater 27 (steps S1 and S2). At this time, the control unit 17 detects the temperature of the carburetor 3 based on the signal from the carburetor temperature detection thermistor 26, and whether the carburetor 3 has reached a predetermined temperature (temperature at which petroleum fuel can be vaporized). It is determined (steps S3 and S4). When the carburetor 3 has reached a predetermined temperature, a drive signal is sent to the electromagnetic pump 2 to drive the electromagnetic pump 2 and a heat generation signal is sent to the ignition heater 6 of the combustion section 4 ( Steps S5 and S6). As a result, the petroleum fuel discharged from the electromagnetic pump 2 is vaporized by the vaporizer 3 and becomes vaporized gas, which is supplied to the combustion section 4 and burned by the burner 5 of the combustion section 4.

At this time, the control unit 17 detects the temperature of the combustion unit 4 based on a signal from a combustion temperature detection thermistor (not shown), and determines whether or not the combustion unit 4 has reached the blast temperature ( Steps S7 and S8). Then, when the temperature of the combustion unit 4 has reached the blowing temperature, a drive signal is sent to the blower 7 to rotate the blower 7 (step S9). As a result, the air is taken into the main body 1, and the air taken into the main body 1 passes through the blower duct 22 and is mixed with the combustion gas generated in the combustion section 4 to become heated air, which is then transferred to the front surface of the main body 1. The air is blown to the outside through the formed outlet 8. At this time, the operation modes of the combustion unit 4 and the blower 7 are initially set to the strong combustion / strong air volume mode.

When the blower 7 starts rotating in this manner, the control unit 17 executes room temperature control according to the flow chart shown in FIG. That is, the control unit 17 first detects the room temperature based on the signal from the room temperature detecting thermistor 16, and determines whether the room temperature is equal to or lower than the set temperature -α (steps S10 and S11). . Here, when the indoor temperature is lower than the set temperature -α, the process proceeds to step S12, and it is determined whether the current operation mode of the combustion unit 4 and the blower 7 is the strong combustion / strong air amount mode. If the operation mode is the strong combustion / strong air volume mode, the process proceeds to step S25 in FIG. 6, and the presence or absence of combustion flame at the opening 4a of the combustion unit 4 is determined based on the signal from the abnormal flame detection device 23. To detect.

On the other hand, when the current operation mode is not the strong combustion / strong air volume mode in step S12, it is determined to be the medium combustion mode, and the process proceeds to steps S13 and S14. Then, after changing the inclination angle of the movable louver 11 from θ ₂ to θ ₁ , the operation mode of the combustion unit 4 and the blower 7 is changed and set from the medium combustion / medium air volume mode to the strong combustion / strong air volume mode.

If the indoor temperature is higher than the set temperature −α in step S11, the process proceeds to step S15, and it is determined whether the indoor temperature is equal to or lower than the set temperature. Here, when the indoor temperature is lower than the set temperature and higher than the set temperature −α, the process proceeds to step S16, and it is determined whether or not the current operation mode is the medium combustion / medium air volume mode. Then, if the operation mode is the medium combustion / medium air volume mode, the process proceeds to step S25 described above, and the presence or absence of combustion flame in the opening 4a of the combustion unit 4 is detected based on the signal from the abnormal flame detection device 23.

On the other hand, if the operation mode is not the medium combustion / medium air volume mode in step S16, the process proceeds to step S17, and it is determined whether or not the current operation mode is the strong combustion / strong air volume mode. Here, when the operation mode is the strong combustion / strong air volume mode, after changing the operation mode from the strong combustion / strong air volume mode to the medium combustion / medium air volume mode, the tilt angle of the movable louver 11 is set to θ ₁ To θ ₂ (steps S18 and S19).

When the operation mode is not the strong combustion / strong air volume mode in step S17, it is determined to be the weak combustion / weak air volume mode, and the process proceeds to steps S20 and S21. Then, after changing the tilt angle of the movable louver 11 from θ ₃ to θ ₂ , the operation mode is changed and set from the weak combustion / weak air volume mode to the medium combustion / medium air volume mode.

When the indoor temperature is higher than the set temperature in step S15, the process proceeds to step S22, and it is determined whether or not the current operation mode is the weak combustion / weak air volume mode. Here, when the operation mode is the weak combustion / weak air volume mode, the process proceeds to step S25, and the presence or absence of the combustion flame in the opening 4a of the combustion unit 4 is detected based on the signal from the abnormal flame detection device 23. .

On the other hand, when the operation mode is not the weak combustion / weak air volume mode, it is determined to be the medium combustion / medium air volume mode, and the process proceeds to steps S23 and S24. Then, after changing the inclination angle of the movable louver 11 from θ ₂ to θ ₃ , the operation mode is changed and set from the medium combustion / medium air volume mode to the weak combustion / weak air volume mode.

Further, the control unit 17 detects the presence or absence of combustion flame in the opening 4a of the combustion unit 4 in step S25 described above. If no combustion flame is present, the process proceeds to step S27, and it is determined whether the combustion switch 24 is OFF.

On the other hand, when the abnormal flame detection device 23 detects a combustion flame, it is determined that an abnormality such as oxygen deficiency has occurred. Then, the process proceeds to step S26, and the angle at which the movable louver 11 closes the blowout port 8 almost completely, that is, θ ₃ is changed. At this time, for example, an alarm buzzer may be sounded to notify the user of the abnormality.

As described above, in the present embodiment, the movable louver 11 is provided at the outlet 8 of the main body 1 so as to be swingable in the vertical direction, and the movable louver 11 is operated in the combustion mode of the combustion unit 4 and the blower 7 in the strong combustion By inclining downward as the mode changes from medium combustion / medium air volume mode and medium combustion / medium air volume mode to weak combustion / weak air volume mode, the direction of the heated air blown from the outlet 8 is directed to the floor surface. You can Therefore, even if the amount of air blown by the blower 7 is switched from relatively strong to weak, the heated air can be blown far along the floor surface, and the entire room can be effectively heated.

In addition, in this embodiment, when the abnormal flame detection device 23 detects the blowing out of the burning flame from the opening 4a of the combustion section 4, the movable louver 11 has an angle close to a fully closed state, and therefore the acid It is possible to detect the combustion flame at the time of abnormality due to lack or the like earlier and prevent the combustion flame from being blown out from the blowout port 8.

Although the oil fan heater using petroleum fuel has been described in the above embodiment, the present invention is not limited to this, and the invention can be applied to a gas fan heater using gas as fuel, for example. .

[0035]

[Effect of device]

 As described above, according to the present invention, a movable louver is provided at the outlet of the main body so that the movable louver can be swung upward and downward, and the movable louver is inclined downward as the amount of air blown by the blower becomes weaker. Therefore, the direction of the heated air blown from the outlet can be directed to the floor. As a result, the heated air does not rise as soon as it leaves the outlet, and the heated air can be blown far along the floor surface, and the entire room can be effectively heated. .

Further, when the abnormal flame detection device detects the emission of combustion flame from the opening of the combustion section, the movable louver has an angle at which the outlet is closed almost completely, so even in the event of an oxygen deficiency or the like, It is possible to prevent the combustion flame from being blown out from the outlet.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a warm air heater according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view near the heated air outlet of the hot air heater.

FIG. 3 is a perspective view showing an example of a drive mechanism that swings and drives a movable louver in a vertical direction.

FIG. 4 is a block configuration diagram of a control unit that variably controls an inclination angle of a movable louver.

FIG. 5: O of a switch for detecting the tilt angle of the movable louver
The timing diagram which shows N-OFF state.

FIG. 6 is a flowchart showing the control operation of the control unit.

FIG. 7 is a flowchart showing room temperature control of a control unit.

FIG. 8 is a schematic vertical sectional view of a conventional warm air heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main body 4 ... Combustion part 4a ... Opening 7 ... Blower 8 ... Outlet 11 ... Movable louver 12 ... Louver drive mechanism 16 ... Room temperature detection thermistor 23 ... Abnormal flame detection device

Claims (1)

[Scope of utility model registration request] 1. A main body having an outlet on a front surface thereof, a combustion section provided in the main body for burning fuel to generate combustion gas, and a combustion gas generated in the combustion section is taken into the main body. A blower that mixes with the air and blows air from the outlet, an indoor temperature detecting unit that detects an indoor temperature outside the main body, a movable louver provided at the outlet and vertically swingable, and an indoor temperature detector. When the indoor temperature detected by the means is higher than the set temperature, the heating power of the combustion section and the blower amount of the blower are controlled to be switched from relatively strong to weak and the movable louver becomes weaker as the blower amount of the blower becomes weaker. Control means for inclining downward and an abnormal flame detection device for detecting combustion flame blown out from the opening of the combustion section are provided, and when the abnormal flame detection device detects combustion flame, almost all of the blowout port is provided. A warm air heater characterized in that the movable louver is driven so as to be closed.