JPH0712861U - Combustion fan heater - Google Patents

Abstract

(57) [Abstract] [Purpose] The depth of the housing is small, and warm air is blown to every corner of the room in a laminar state, and the intake port on the back of the housing is temporarily blocked. Provided is a combustion fan heater that does not deteriorate the combustion state. [Structure] Housing 2 having intake port 8 and hot air outlet 9
And a cross flow fan 10 arranged in the lower part of the housing 2,
Blower duct 15 provided in housing 2, combustion tube 16 provided inside air duct 15 and combustion tube 16
And a combustor 28 provided inside the blower duct 1 for sucking air from the intake port 8 by the cross flow fan 10
5 and the combustion cylinder 16 to be circulated, and the combustion device 28
The vaporized gas vaporized by the carburetor 30 is caused to flow into the combustion cylinder 16 through the suction port 43 of the burner 31 and the inside thereof, and is ejected from the flame port 41 to be burned. The exhaust gas is merged with the air sucked into the air duct 15 to form warm air, and this warm air is sent to the front of the housing 2 through the hot air outlet 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a combustion fan heater that blows warm air from a hot air outlet using exhaust gas from combustion.

[0002]

[Prior art]

 Generally, this type of fan heater has an intake port on the back side and a combustion tube in the housing with a hot air outlet on the front side, the burner is housed in this combustion tube, and a propeller fan is installed at the opening of the intake port. The burner burns fuel such as kerosene.

Exhaust gas generated by combustion in the burner rises in the combustion cylinder and flows out from the opening at the upper end of the combustion cylinder. Also, the rotation of the propeller fan blows air from the intake port toward the warm air outlet, The exhaust gas flowing out from the combustion tube merges with each other to form a warm air having an appropriate temperature, and the warm air is sequentially blown from the hot air outlet to the front of the housing.

[0004]

[Problems to be solved by the device]

 However, in such a conventional fan heater, since the propeller fan is arranged on the back side of the housing, the depth width of the housing becomes large, and since the propeller fan is used, warm air is swirled. As a result, the airflow is reduced and the airflow capacity is reduced, and the hot air cannot be effectively sent to every corner of the distance in the room.

The present invention has been made in view of such a point, and its purpose is to make it possible to reduce the depth width of the housing and to blow warm air in a laminar flow state. It can be effectively delivered to the far corners of the room, and even if the intake port on the back of the housing is temporarily blocked, it does not deteriorate the combustion state. To provide a combustion type fan heater.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention has a housing having an intake port on the back and a hot air outlet on the front, and a cross-flow fan provided in the lower part of the housing along the left-right direction, A fan casing that surrounds the cross-flow fan, an inlet and an outlet provided in the fan casing, and a casing provided inside the casing between the inlet of the fan casing and the inlet of the casing. Blower duct, combustion cylinder provided inside the blower duct, inflow opening formed in the lower part of the combustion cylinder and outflow opening formed in the upper part, and combustion device provided in the combustion cylinder The combustion device includes a burner having an intake port and a flame port, and a carburetor that vaporizes fuel. The crossflow fan draws in air from an intake port on a back surface of the housing to blow air. Inside the duct And the vaporized gas that has been vaporized by the carburetor in the combustion device flows into the interior of the burner from the suction port of the burner together with the air that has been sucked into the combustion tube, and mixes the vaporized gas with the air. Gas is ejected from the flame opening and burned, and the exhaust gas from this combustion is combined with the air sucked into the air duct to form warm air, which is sucked into the fan casing through the suction port. At the same time, the air is blown from the outlet to the front of the casing through the warm air outlet on the front of the casing.

[0007]

[Action]

 When the cross-flow fan is driven and rotates, the air in the blower duct is sucked into the fan casing, and this suction creates a negative pressure in the blower duct. Inhaled into.

A part of this air is sucked into the fan casing through the ventilation passage between the blower duct and the combustion cylinder, and another part of the air is sucked into the combustion cylinder through the inflow opening at the bottom of the combustion cylinder. To be done.

On the other hand, in the combustion device, the vaporized gas of the fuel is ejected from the vaporizer toward the inlet of the burner. Then, the air sucked into the combustion cylinder flows into the burner through the suction port of the burner together with the vaporized gas as the primary air for combustion, and the primary air for combustion and the vaporized gas are mixed to form a mixed gas, This mixed gas is ejected from the burner flame and burns.

The high-temperature exhaust gas resulting from this combustion flows out from the outflow opening in the upper part of the combustion cylinder, merges with the air flowing in the air blowing duct, and mixes to become warm air of an appropriate temperature. Then, this warm air is sucked into the fan casing through the suction port, and this warm air is sequentially blown from the discharge port to the front of the housing through the warm air outlet.

As described above, the warm air is blown from the hot air outlet by the cross-flow fan. Therefore, the air blowing capacity is increased as compared with the conventional propeller fan, and the warm air is blown from the hot air outlet. The warm air flows out in a laminar state, and as a result, it reaches the far corners of the room and can effectively heat the room.

Further, since the cross-flow fan is arranged in the lower portion of the housing, the width of the depth of the housing can be reduced, and the amount of protrusion from the wall surface when installed indoors is reduced. During combustion in the combustion device, if the intake port on the back surface of the housing is blocked by, for example, a curtain or the like, the negative pressure state in the blower duct becomes stronger. However, since the entire burner is installed inside the combustion tube inside this blower duct, the air pressure around the burner part of the burner and the air pressure around the suction part are kept at the same pressure and balanced. Therefore, the amount of air flowing into the burner does not fluctuate significantly, so that the combustion state does not deteriorate and a stable combustion state is maintained.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a fan heater, and FIG. 2 is a front view of the fan heater. A housing 2 is attached on top of 1. The inside of the housing 2 is partitioned by a partition plate 3 into a tank chamber 4 and an equipment chamber 5, and an oil pan 6 is provided in the lower portion of the tank chamber 4. A cartridge type fuel tank 7 is removably housed in the tank chamber 4, and fuel (kerosene) is constantly supplied from the fuel tank 7 into the oil receiving tray 6 at a constant level. ing.

An intake port 8 is formed in the upper back portion of the housing 2 so as to face the equipment chamber 5, and a warm air outlet 9 is provided in the lower front portion of the housing 2 so as to face the equipment chamber 5. Has been formed. A cross-flow fan 10 is horizontally provided in the lower part of the equipment chamber 5 along the left-right direction of the housing 2, and the cross-flow fan 10 is surrounded by a fan casing 11. The fan casing 11 has an inlet 12 at the upper part and an outlet 13 at the lower part of the front surface, and is arranged so that the outlet 13 faces the hot air outlet 9 formed in the housing 2. The cross flow fan 10 is driven by a motor (not shown) provided on one side surface of the fan casing 11 to rotate.

A blower duct 15 is provided in the housing 2 above the fan casing 11, and the blower duct 15 faces a back surface facing the intake port 8 and an intake port 12 of the fan casing 11. The lower surfaces are open, and a combustion cylinder 16 is provided inside the blower duct 15.

The combustion cylinder 16 is arranged so as to face the intake port 8 of the housing 2, and a space between the combustion cylinder 16 and the inner surface of the blower duct 15 constitutes a ventilation passage 17. An inflow opening 18 is formed in the lower portion of the combustion cylinder 16, and an outflow opening 19 is formed in the upper portion thereof. The inflow opening 18 faces the intake port 8 and the upper side of the outflow opening 19 is formed. A ventilation guide 20 is provided.

A burner case 23 is provided inside the combustion cylinder 16. As shown in FIG. 3, the burner case 23 includes a rear case plate 24 and a front case plate 25. Both ends of the back case plate 24 are fixed to both side plates of the blower duct 15. A front case plate 25 is detachably attached to the front surface via a plurality of setscrews 26.

A support plate 27 is sandwiched between the rear case plate 24 and the front case plate 25, and the combustion device 28 is supported inside the burner case 23 via the support plate 27, and the rear case plate is supported. An air inlet 29 for taking in combustion air into the burner case 23 is formed at 24. As shown in FIGS. 3 and 4, the combustion device 28 includes a vaporizer 30 that vaporizes fuel (kerosene), and a Bunsen burner 31 that burns vaporized gas of the fuel supplied from the vaporizer 30. The carburetor 30 is attached to one side surface of the support plate 27, and the burner 31 is attached to the other side surface of the support plate 27 to be assembled as an integral unit.

The vaporizer 30 includes a heater 32 and a vaporization pipe 33, an oil supply pipe 34 is detachably connected to one end of the vaporization pipe 33, and the other end of the vaporization pipe 33 extends to the side where the burner 31 is arranged. A nozzle 35 is provided at the extended end of the nozzle 35, a needle valve 36 is incorporated in the nozzle 35, and a solenoid 37 for driving the needle valve 36 is attached to the rear end of the nozzle 35.

Then, the fuel in the oil receiving tray 6 is fed into the vaporizing pipe 33 through the oil feeding pipe 34 by an oil feeding means (not shown) such as an electromagnetic pump, and this fuel is heated by the heater 32 and vaporized. The vaporized gas is sequentially ejected from the nozzle 35 in response to the opening operation of the needle valve 36.

As shown in FIG. 5, the burner 31 is formed in a flat and substantially trumpet shape, an upper end surface of which is a flame mouth portion 41, and a lower end side of which is provided with a mixing tube 42 which extends substantially horizontally. An end surface of the pipe 42 on one end side is opened as a suction port portion 43, and the suction port portion 43 is arranged so as to face the tip portion of the nozzle 35.

As shown in FIG. 3, the upper end of the burner 31 projects upward from the upper wall surface of the burner case 23, and the upper end of the burner 31 is covered with a frame holder 44. An elongated opening 45 is formed so as to face the flame mouth portion 41 of 31. The frame holder 44 is detachably attached to the burner case 23 via a set screw 46.

An ignition heater 47 and a frame rod 48 are attached to the support plate 27 supporting the carburetor 30 and the burner 31 so as to be spaced apart from each other and in parallel, and the tip ends of the ignition heater 47 and the frame rod 48 are attached. As shown in FIG. 4, the burner 31 is arranged so as to extend above the flame opening 41 and face the flame opening 41.

As shown in FIG. 3, the carburetor 30 is provided with a fuse support 50 having excellent heat conductivity, which is made of, for example, aluminum, and a lower end portion of the fuse support 50 projects downward from the burner case 23. A thermal fuse 51, which is electrically connected in series with the heater 32, is attached to the protruding end portion.

The vaporized gas ejected from the nozzle 35 is fed into the mixing pipe 42 from the suction port portion 43 of the burner 31. At this time, the air around the suction port 43 is sucked into the mixing pipe 42 through the suction port 43 as primary air for combustion together with the vaporized gas, and the air and the vaporized gas are mixed in the mixing pipe 42. Becomes mixed gas.

Then, this mixed gas is ejected from the flame mouth portion 41, ignited by the ignition heater 47 and burned, and the combustion flame passes from the flame mouth portion 41 through the inside of the opening 45 of the frame holder 44 and stands above it. Go up. Then, the flame current of the combustion flame is detected by the flame rod 48, and the suitability of the combustion state is judged based on this detection.

As shown in FIG. 1, a front plate 2a is provided on the front surface of the housing 2, and a duct front plate 15a that forms a part of the air duct 15 is provided on the inner side of the front plate 2a. Furthermore, a combustion cylinder front plate 16a forming a part of the combustion cylinder 16 is provided on the inner side of the duct front plate 15a. The front plate 2a, the duct front plate 15a, and the combustion cylinder front plate 16a are detachably attached to the housing 2, the air duct 15, and the combustion cylinder 16 by means such as screws.

Therefore, when the front plate 2a, the front plate 15a of the duct, and the front plate 16a of the combustion cylinder are removed, the front surfaces of the housing 2, the air duct 15, and the combustion cylinder 16 are opened as shown in FIG. The burner case 23 is exposed on the front side of the housing 2. When the set screw 26 is removed and the burner case 23 is disassembled, the combustion device 28 integrally attached to the support plate 27 is separated from the burner case 23 together with the support plate 27. It can be taken out to the front side of 2 and the work such as maintenance and inspection can be easily performed.

As shown in FIG. 7, a filter unit 54 facing the opening surface of the intake port 8 is detachably attached to the outside of the intake port 8 formed on the back surface of the housing 2. A guard 55 is provided inside 8. The guard 55 is arranged between the intake port 8 and the combustion cylinder 16, and a large number of ventilation holes 56 are evenly formed in the plate surface of the guard 55. A fixed space H is provided between the guard 55 and the filter unit 54.

The filter unit 54 captures foreign matter such as dust in the air passing through the intake port 8, and therefore the filter unit 54 gradually becomes dirty. If the filter unit 54 becomes dirty, remove the filter unit 54 and clean it. Although the intake port 8 is opened when the filter unit 54 is removed, a guard 55 is provided inside the intake port 8 so that the high temperature combustion cylinder 16 is not touched by the hand and the intake port 8 can be safely operated. It can be handled.

Since a fixed distance H is provided between the filter unit 54 and the guard 55, the entire area of the filter unit 54 can be effectively utilized. In other words, if the filter unit 54 and the guard 55 are in close contact with each other, the air does not pass through the entire area of the filter unit 54, but only passes through the portion of the guard 55 facing the ventilation holes 56 ... Although the use efficiency of the filter unit 54 is reduced, in the present embodiment, a constant distance H is provided between the filter unit 54 and the guard 55, so that the entire air space of the filter unit 54 is evenly distributed. Pass through, and therefore the entire area can be effectively utilized without waste.

As shown in FIGS. 8 and 9, between the lower edge of the front wall of the housing 2 and the upper surface of the stand 1, a slight gap 59 is provided below the warm air outlet 9. There is. Then, a protrusion 1a is integrally formed on the upper surface of the mounting table 1 along the left-right direction of the housing 2, and most of the gap 59 is closed by the protrusion 1a, and only a part of the protrusion 1a is provided inside and outside the casing 2. A thermostat 61 as a safety device is provided on the upper surface of the mounting table 1 so as to be opened as a ventilation part 60 for communicating with each other.

The warm air outlet 9 is composed of a frame 62, and the discharge port 13 of the fan casing 11 is connected to the frame 62, and a gap 63 is formed in a part of the connection portion. The inside of the discharge port 13 communicates with the ventilation part 60 via the circumference of the thermostat 61. Reference numeral 64 is a louver provided inside the warm air outlet 9 for changing the wind direction.

During operation of the combustion fan heater thus configured, first, the heater 32 in the combustion device 28 is energized, and the carburetor 30 is preheated by the heater 32. Then, after that, the cross-flow fan 10 is driven, and the air in the blower duct 15 is sucked into the fan casing 11 by the rotation of the fan fan 10, and the suction causes a negative pressure in the blower duct 15, and accordingly the casing is The air outside 2 is sucked into the blower duct 15 through the intake port 8.

A part of this air is sucked into the fan casing 11 from the upper part of the combustion cylinder 16 through the ventilation passage 17, and the other part of the air passes through the inflow opening 18 at the lower part of the combustion cylinder 16. It is sucked into the combustion cylinder 16.

On the other hand, in the combustion device 28, after heating the carburetor 30 to a predetermined temperature by heating by the heater 32, fuel (kerosene) is sequentially supplied into the vaporization pipe 33 through the oil supply pipe 34. Then, this fuel is vaporized by the heat of the vaporizer 30 and becomes vaporized gas, and this vaporized gas is ejected from the nozzle 35 toward the suction port portion 43 of the burner 31.

A part of the air sucked into the combustion cylinder 16 flows into the burner case 23 through the air inlet 29, and this air is burned together with the vaporized gas ejected from the nozzle 35 as the primary air for combustion into the burner 31. From the suction port 43 into the mixing pipe 42, and the primary air for combustion and the vaporized gas are mixed to form a mixed gas. Then, the mixed gas is ejected from the flame opening 41 of the burner 30 and is ignited by the ignition heater 47 to burn, and the combustion flame rises above it through the opening 45 of the frame holder 44.

The high-temperature exhaust gas resulting from this combustion flows out from the outflow opening 19 in the upper part of the combustion cylinder 16, joins with the air flowing through the ventilation passage 7 and mixes, and becomes warm air of an appropriate temperature. Then, the hot air is sucked into the fan casing 11 through the suction port 12, and further, the hot air is sequentially blown from the discharge port 13 to the front of the housing 2 through the warm air outlet 9.

As described above, the warm air is blown from the hot air outlet 9 by the cross-flow fan 10. Therefore, the blowing capacity is increased as compared with the case of the conventional propeller fan, and the warm air is blown from the hot air outlet 9. The warm air flows out in a laminar flow state, and as a result, reaches the far corners of the room to effectively heat the room.

Further, since the cross flow fan 10 is disposed in the lower part of the housing 2, the width of the depth of the housing 2 can be reduced and the amount of projection from the wall surface when installed in the room is reduced.

When the intake port 8 is closed by a curtain or the like during combustion in the combustion device 28, the negative pressure state in the blower duct 15 increases. However, since the entire burner 31 is provided inside the combustion tube 16 inside the blower duct 15, the atmospheric pressure around the flame port 41 of the burner 31 and the atmospheric pressure around the suction port 43 are the same. The pressure is maintained and balanced, so that the amount of air flowing into the burner 31 does not fluctuate significantly, and therefore the combustion state does not deteriorate and a stable combustion state is maintained.

In other words, if the structure is such that the primary air for combustion is taken into the burner 31 from the outside of the casing 2, a large amount of the large amount of air is burned in the burner 31 when the negative pressure state around the flame mouth portion 41 becomes stronger. Although air flows in and causes abnormal combustion such as incomplete combustion due to excess air, in the present embodiment, the amount of air flowing into the burner 31 is almost constant regardless of fluctuations in the negative pressure in the blower duct 15. It can be kept constant to prevent abnormal combustion from occurring.

When the hot air outlet 9 is blocked by an obstacle such as laundry, the pressure inside the discharge port 13 of the fan casing 11 rises, and the temperature of the hot air also rises. Then, as the pressure inside the discharge port 13 rises, the warm air inside the discharge port 13 is ejected from the gap 63 through the ventilation part 60. A thermostat 61 as a safety device is provided in the middle of the path from the gap 63 to the ventilation part 60. Therefore, the thermostat 61 operates along with the flow of hot hot air, and based on this operation. Combustion operation is stopped and safety is ensured.

The energization of the heater 32 in the combustion device 28 is controlled by the energization control circuit, and the temperature of the carburetor 30 is maintained at a predetermined temperature (about 250 to 300 ° C.) suitable for vaporizing the fuel by this control. Then, the heat of the vaporizer 30 is transmitted to the thermal fuse 51 (melting temperature 188 ° C.) through the fuse support 50 having excellent thermal conductivity.

However, the thermal fuse 51 is arranged below the burner case 23, and low-temperature air (about 20 ° C.) constantly flows around the thermal fuse 51. Therefore, this air causes the thermal fuse 51 to flow. After being cooled, the temperature of the thermal fuse 51 is normally maintained at about 110 to 120 ° C.

In this state, for example, if the rotation of the cross flow fan 10 is stopped for some reason, the overheat protector (not shown) normally operates due to overheating of the carburetor 30, and this overheat prevention is prevented. The heater 32 is de-energized by the operation of the vaporizer, but if the overheat protector does not operate properly, the carburetor 30 overheats and the heat passes through the fuse support 50, which has excellent thermal conductivity. It is transmitted to the fuse 51. Further, at this time, the air-cooling action on the thermal fuse 51 is interrupted due to the stop of the cross-flow fan 10, so that the thermal fuse 51 quickly reaches the fusing temperature and fusing, and this fusing cuts off the power supply to the heater 32. Safety is achieved.

Further, even when the carburetor 30 is overheated due to a failure of the power supply control circuit of the heater 32 during the preheating of the carburetor 30 before the cross-flow fan 10 is rotated, the temperature fuse 51 is promptly changed similarly. Fusing to ensure safety.

[0048]

[Effect of device]

 As described above, according to the present invention, since the cross-flow fan is provided in the lower part of the housing, the depth width of the housing can be reduced, which is convenient for indoor installation, and the cross-flow fan blows warm air. The warm air can be blown in a laminar state from the outlet to effectively blow it out to the far corners of the room, and the air intake on the back of the housing may be temporarily blocked. However, there is an advantage that fluctuations in the amount of air flowing into the burner can be suppressed and deterioration of the combustion state can be avoided.

[Brief description of drawings]

FIG. 1 is a sectional view showing the structure of a combustion fan heater according to an embodiment of the present invention.

FIG. 2 is a front view of the combustion type fan heater.

FIG. 3 is a sectional view of a combustion device incorporated in the combustion fan heater.

FIG. 4 is a plan view of the combustion device.

FIG. 5 is a front view of a burner in the combustion device.

FIG. 6 is a cross-sectional view showing a state in which a front portion of the combustion type fan heater is opened.

FIG. 7 is a sectional view of an intake port portion of the combustion type fan heater.

FIG. 8 is a cross-sectional view of a hot air outlet in the combustion type fan heater.

FIG. 9 is a front view of a hot air outlet of the combustion type fan heater.

[Explanation of symbols]

 2 ... Casing 8 ... Intake port 9 ... Warm air blowout port 10 ... Cross flow fan 11 ... Fan casing 12 ... Suction port 13 ... Discharge port 15 ... Blow duct 16 ... Combustion cylinder 18 ... Inflow opening 19 ... Outflow opening 28 ... Combustion Device 30 ... Vaporizer 31 ... Burner 41 ... Flame port 43 ... Suction port

Claims (1)

[Scope of utility model registration request] 1. A housing having an intake port on the rear surface and a hot air outlet on the front surface, a cross-flow fan provided in the lower part of the housing along the left-right direction, and a fan casing enclosing the cross-flow fan. A suction port and a discharge port provided in the fan casing, a blower duct provided in the casing between the suction port of the fan casing and the suction port of the casing, and the blower duct of the blower duct. The combustion device includes: a combustion tube provided inside; an inflow opening formed at a lower portion of the combustion tube; an outflow opening formed at an upper portion of the combustion tube; and a combustion device provided inside the combustion tube. Is equipped with a burner having an intake port and a flame port, and a carburetor for vaporizing fuel. The cross-flow fan draws in air from an intake port on the back surface of the housing and distributes it in a blower duct and a combustion cylinder. Let the combustion device Causes the vaporized gas vaporized by the vaporizer to flow into the interior of the burner through the inlet of the burner together with the air sucked into the combustion cylinder, and the mixed gas of the vaporized gas and the air is ejected from the flame outlet to burn. Then, the exhaust gas from this combustion is combined with the air sucked into the blower duct to form warm air, and this warm air is sucked into the fan casing through the suction port and at the same time from the discharge port to the warm air outlet on the front face of the housing. A combustion-type fan heater characterized in that it blows air through the front of the housing through the.