JP2001082807A - Heating instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain low noises, without being accompanied by any uncomfortable feeling, and comfortable feeling of heating by a method wherein a heating instrument, such as a kerosene fan heater or the like, is provided with a combustion chamber, evaporating liquid fuel to burn the same, as well as a heat generating means, irradiating radiant heat, so that the heat generating means generates heat by receiving heat of warm-air from the combustion chamber. SOLUTION: When combustion in the combustion chamber 9 of a kerosene fan heater is started and a flame sensor 8 has detected a flame current, higher than a preset current value, a fan motor 10 is excited and a ventilating fan 10a is turned to suck air in a room. A louver mounting plate 19 is established before the combustion chamber 9 while the louver mounting plate 19 is provided with an opening on a part opposed to the combustion chamber 9 and a radiation protective plate 12 is attached so as to cover the upper part of the opening. The radiation protective plate 12 is heated by warm-air, passing along the radiation protective plate 12, and radiant heat, coming from the combustion chamber 9, while far infrared rays, irradiated from the far infrared ray coating of the radiation protective plate 12, and radiant heat are irradiated into the room through a multitude of small holes on a front panel 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device such as an oil fan heater.

[0002]

2. Description of the Related Art Conventionally, petroleum fan heaters have been widely used in ordinary households as heating equipment in winter. FIG. 9 is a schematic partial cross-sectional front view of an example of a conventional oil fan heater. FIG. 10 is a side sectional view thereof. As shown in FIG. 9, on the side of the oil fan heater main body 101,
A fuel tank 102 for injecting and storing a liquid fuel 104 such as kerosene in advance is provided, and a sufficient amount of the liquid fuel 104 is supplied to a fuel tank 103 connected below the fuel tank 102. Is done.

The liquid fuel 104 stored in the fuel tank 103 is guided to a carburetor 107 via an oil supply pipe 106 by a fuel pressure feeding electromagnetic pump 105. Here, the sent liquid fuel 104 is vaporized by a vaporizer heater (not shown) provided in the vaporizer 107. 109
Is a combustion chamber, on the bottom of which a burner 108 is supported and fixed.

[0004] The fuel gas vaporized by the vaporizer 107 is vigorously injected from a nozzle, is introduced into the burner 108 together with combustion air, and is burned at a flame opening 108a.
The air in the combustion chamber 109 is heated. As shown by arrows in FIG. 9, the air in the room sucked through a filter 112 is blown by a blower fan 111 attached to a fan motor 110 such as a single-phase induction motor provided on the back surface of the main body 101, and the combustion chamber 109. The air is blown into the room from the outlet 113 as warm air together with the heated air and the combustion gas inside.

On the other hand, a frame sensor 114 provided slightly above the flame opening 108a detects a flame current due to combustion flame. When a flame current of a predetermined value or more is detected, the fan motor 110 is energized. Fan 1
11 rotates, and the air sucked from the room is blown into the room from the outlet 113 as warm air. At this time, the room temperature is detected by the room temperature thermistor 115, and a control device (not shown) controls the driving of the electromagnetic pump 105 for fuel pressure feeding based on the temperature difference between the room temperature and the set temperature. The heating power of the combustion flame in the burner 108 is adjusted by adjusting the supply amount to the vaporizer 107. So, for example,
If you start operating the oil fan heater when the room temperature is low,
The supply amount of the liquid fuel 104 to the vaporizer 107 is increased to rapidly raise the room temperature to a set temperature.
Adjust the supply amount of No. 4 to keep it constant near the set temperature.

[0006]

However, in the conventional oil fan heater, only warm air is blown out from the outlet, and when a part of a body such as a hand or a foot is cooled, a feeling of heating due to radiant heat is obtained. There was a problem that lacked. In order to eliminate such inconvenience, there is a heating device that provides a radiation part by radiation separately from the outlet for blowing hot air,
Since the hot-air blowout portion and the radiation-emitting portion are located apart from each other, there is no heating device that can simultaneously obtain radiation heat by radiation and a feeling of heating by hot air. In addition, conventional oil fan heaters always emit hot air at a considerable wind speed, so when hot air hits the human body directly, many people, especially elderly people, are uncomfortable, During operation of the fan heater, noise due to the driving noise of the fan motor, the rotation noise of the blower fan, the blowing sound of warm air, etc. was harsh.

Accordingly, the present invention provides a radiating portion by radiant heat which also serves as a hot air blowing portion, so that a comfortable feeling of heating can be obtained. In particular, if the indoor temperature rises,
An object of the present invention is to provide a low-noise heating device that suppresses the amount of hot air, uses radiant heat mainly from radiation from a heating unit, and does not cause discomfort.

[0008]

In order to achieve the above object, the present invention provides a combustion chamber for vaporizing and burning a liquid fuel, a heating means for radiating radiant heat, and a front plate having an outlet opening. A heating device having a blowing means for inhaling external air and discharging the air from the outlet, wherein the heat generating means generates heat by receiving heat with warm air from the combustion chamber. Equipment.

Further, the heating means is a heating apparatus characterized in that a paint which emits far infrared rays by heat is applied to the surface on the front plate side.

[0010] Further, there is provided a heating apparatus characterized in that the heating means is provided in a part of a passage from the combustion chamber to the outlet.

Further, the heating device is characterized in that the heating means is attached so that the passage width of the passage is substantially constant.

Further, there is provided a heating device provided with an air introduction passage for sucking external air without passing through the combustion chamber and guiding it to the discharge port.

The heat generating means is provided between the outlet of the air introduction passage and the front plate, and an opening is provided in a part of the heat generating means between the outlet and the front surface. A heating device characterized by the following.

[0014] Further, the heating device is characterized in that the opening is constituted by a large number of small holes.

[0015] Further, there is provided a heating apparatus characterized in that a small hole is provided on a surface of the front plate other than the outlet.

[0016] Further, there is provided a heating device having a control device for energizing the blowing means so as to adjust a blowing amount of the hot air.

Further, a control device is provided for energizing the heating means so as to adjust the amount of heat generated by the radiant heat and energizing the blowing means so as to adjust the amount of hot air blown based on the amount of generated heat. Heating equipment.

A temperature sensor for detecting an external temperature;
After the external temperature detected by the temperature sensor reaches the set temperature, the amount of radiant heat radiated from the heat generating means is reduced, and the amount of warm air blown by the blowing means is reduced. A heating device having a control device for adjusting.

A heating means provided in the housing for radiating radiant heat; a blowing means for sucking room air and discharging the sucked air into a room from an air outlet provided in a lower portion of the front surface of the housing; In a heating device having a baffle duct provided in the housing so as to receive heat from the heat generating means on the way and discharge it into the room through the outlet as warm air, and operate with the front plate provided with a number of small holes. A heating device, wherein a shielding plate is provided in a space between the operating unit facing an external space for operating a state, and a projection is provided on a surface of the shielding plate.

[0020]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of an oil fan heater which is an example of a heating device according to the present invention, and FIG. 2 is a side sectional view thereof.

The petroleum fan heater main body 1 comprises a detachable front plate 2 (see FIG. 6) and a top plate 6 formed integrally with the side surface. It is mounted and fixed on a mounting table 5 for receiving it.

On the front surface of the main body 1, an operation section 3 formed above the main body 1 is operated by a key input operation to operate in a desired mode or set a room temperature. An outlet 4 extending slightly in the width direction and having an opening formed therein to blow warm air is provided. Combustion chamber 9
Is defined by a front wall 17, a back wall 18, and a side wall (not shown) in the width direction, and has a structure having an opening above. Since the front wall 17 and the back wall 18 become high in temperature due to the radiant heat of the combustion flame, the durability against long-term use is improved by using a heat-resistant material or applying a heat-resistant coating. The lower part of the combustion chamber 9 is partitioned by a lower heat shield plate 31, and a burner box 32 containing the burner 7 is suspended from the lower heat shield plate 31.

Above the flame opening 7a of the burner 7, a frame sensor 8 for detecting the flame current of the combustion flame is provided.
The frame sensor 8 is connected to a control device 16.
Reference numeral 28 denotes a room temperature thermistor disposed at an appropriate position on the back of the main body 1 for detecting room temperature. The control device 16 is equipped with a general-purpose microcomputer, and as shown in FIG.
Output signals from the room temperature thermistor 28 and the frame sensor 8 allow the fan motor 10 and the electromagnetic pump 22
Control the output of Circuits related to heating control are omitted.

Reference numeral 11a denotes an upper partition plate which partitions the combustion chamber 9 inside the main body 1 from its upper part, extends substantially horizontally from the back to the front, and is partitioned above the combustion chamber. Further, the upper part of the partition plate 11c is formed so as to extend substantially horizontally forward of the main body and hang down from the bent portion in the middle with a certain inclination forward, thereby forming the upper part of the partition plate. An upper heat shield plate 11b is supported and fixed below the upper partition plate 11a so as to face the upper partition plate 11a. Therefore, the air introduction path 13 is formed in the space sandwiched between the upper partition plate 11a, the upper front partition plate 11c, and the upper heat shield plate 11b. Upper partition plate front 11c and upper heat shield plate 11
and b may be combined to be integrated and incorporated into the upper partition plate 11a. Further, in front of the upper partition plate 11a, a display unit 15 which forms a part of the operation unit 3 and displays an operation mode, a room temperature, and the like, and controls an operation of a device in response to an input from the operation unit 3 A control device 16 having a microcomputer for displaying various information on the display unit 15 is provided. A fan motor 10 having a blower fan 10a is mounted at a position facing the combustion chamber 9 on the back surface of the main body 1 so as to take in room air through a filter 29.

On the other hand, a louver mounting plate 19 is provided upright in front of the combustion chamber 9. FIG. 4 is an external perspective view of the louver mounting plate 19 as viewed from the front. The louver mounting plate 19 has an opening 14 at a portion facing the combustion chamber 9, the height of the opening 14 is 70 to 80 mm, and a radiation protection plate is provided so as to cover a 70 to 80 mm portion above the opening 14. In the upper part of the radiation protection plate 12, a number of small holes 26 (two rows of 5 mm × 30 mm slit holes) are provided. The lower part of the radiation protection plate 12 protrudes downward toward the front of the main body, and is a wind shield portion 25 formed in a “U” shape. Heat-resistant paint that radiates infrared rays is applied.

The louvers 4a, 4a
・ ・ After welding, the surface is coated with heat-resistant black paint. Therefore, even if the inside of the main body 1 is seen through from the front of the main body 1, it is dark and the internal structure is difficult to read.

The portion of the opening 14 below the radiation protection plate 12 is a hot air outlet, and a plurality of the louver mounting plates 19 including this portion extend in the width direction (2 in this figure). Louvers 4a, 4a,...

FIG. 6 is an external perspective view of the front plate. Front plate 2
Is made of metal and is formed by press working. The lower part has an opening 4, and the upper part has an opening 37 for fitting with the operation unit 3. Except for the opening 37, Numerous small holes 23 (round holes with a diameter of 2 to 3 mm) over the entire surface
The front panel 24 is opened. In addition, a panel reinforcing plate 34 is provided on the lower surface of the lower part of the front panel 24,
The panel reinforcing plate 34 has a shape in which a hole is formed in a central portion excluding an edge, and is attached to the front panel 24 side in a “U” shape.
It serves to reinforce the lower part of the front panel 24.

As shown in FIGS. 7 and 8, the front panel 24 is inserted from the inside of the front plate 2 to the outside, and is folded back inside the front plate 2 to form a portion 2a. The slit 2b of the squeezed edge 24a of the front panel 24 is fitted into the hook 2b, and the hook 2b of the folded portion 2a of the front plate is bent and attached.
The method of attaching the front panel 24 to the front plate 2 can be replaced by a method of attaching with screws instead of the folding method of the nail.

FIG. 5 is a front view showing a state in which the front plate 2 and the louver mounting plate 19 have been removed from the oil fan heater according to the present invention. Above the inside of the main body 1, a front panel 24
A small wire or the like is inserted through the small hole 23, and a shielding plate 35 is provided to prevent an electric shock by touching the charged part of the control circuit, and a horizontally long width of about 20 to 3 is provided on the front side of the shielding plate 35.
A 0 mm convex beat portion 36 is provided, the surface is painted black, and the internal structure is difficult to see. Since the front panel 24 is made of a thin steel plate and is provided with the small holes 23, it tends to be sticky when pressed down. Therefore, the front panel 24 is received by the convex beat portion 36 of the shielding plate 35. The rattling can be prevented.

The main body 1 has an oil tank (not shown).
Has a fuel tank 21 for receiving a supply of liquid fuel such as kerosene and storing a predetermined amount of liquid fuel. The fuel tank 21 is connected to a carburetor 20 via a fuel pump electromagnetic pump 22 and an oil supply pipe.

The operation of the above configuration will be described.
When the power switch is turned on by operating an operation switch (not shown) of the operating unit 3 of the oil fan heater, the vaporizer 2 (not shown) attached to the vaporizer 20 causes the vaporizer 2 to operate.
0 is heated. At this time, the temperature of the carburetor 20 is detected by a carburetor thermistor (not shown). When the carburetor 20 is heated to a predetermined temperature, the fuel pumping electromagnetic pump 22 is driven to drive the fuel tank 21 into the fuel tank 21. The liquid fuel is sucked up and sent to the vaporizer 20 via the oil supply pipe 27. The liquid fuel is gasified by the heated vaporizer 20,
The gas is blown out from the burner port 7a of the burner 7, and is ignited at the burner port 7a and burns in the combustion chamber 9. At this time, based on the difference between the room temperature detected by the room temperature thermistor 28 and the set temperature set from the operation unit 3, the control device 16 controls the drive of the fuel pumping type electromagnetic pump 22 to send the liquid fuel to the carburetor 20. By changing the amount, the amount of heat generated by combustion is appropriately adjusted.

When the combustion starts and the flame sensor 8 detects a flame current equal to or greater than a preset current value, the fan motor 10 is energized and the blower fan 10a rotates to suck the room air. The rotation speed is controlled by the control device 16. The sucked indoor air deprives the obtained radiant heat in the combustion chamber 9 and blows out the hot air along with the combustion gas from the outlet 4 to the outside (room) of the main body 1 to increase the room temperature.

Next, the flow of air in the main body 1 will be described with reference to FIG. Immediately after the operation switch (not shown) of the oil fan heater is turned on when the room temperature is very low, the room temperature is considerably lower than the set temperature, and it is necessary to rapidly increase the room temperature.

For this reason, the controller 16 to which the temperature detected by the room temperature thermistor 28 and the set temperature are input increases the drive output of the fuel pumping electromagnetic pump 22 and increases the amount of liquid fuel sent to the carburetor 20 to burner. 7 and the fuel pumped electromagnetic pump 22
Also, the output of the fan motor 10 linked therewith is increased to increase the rotation speed of the blower fan 10a. As a result, as shown by the arrow A in the drawing, 130-180 ° C. warm air is blown into the room from the outlet, and the room temperature can be quickly raised to the set temperature.

When the room temperature thermistor 28 detects that the room temperature has reached the set temperature, the control device 16 lowers the drive output of the fuel pumping type electromagnetic pump 22 and reduces the amount of liquid fuel sent to the carburetor 20, thereby reducing the burner. In addition to weakening the combustion power of the combustion flame at 7, the output of the fan motor 10 controlled in conjunction with the fuel pumping type electromagnetic pump 22 is also reduced to reduce the rotation speed of the blower fan 10a. Thereby, the warm air passing along the radiation protection plate 12 and the combustion chamber 9
The radiation protection plate 12 is heated by the direct radiant heat from the radiator, and the far infrared rays and the radiation heat radiated from the far-infrared paint coated on the radiation protection plate 12 are radiated into the room through the many small holes 23 of the front panel 24. In particular, far-infrared rays penetrate deep into the body of the warmer and have the effect of warming the body from the core, so that comfortable heating can be obtained with the breeze blown out from the outlet 4. In addition, the wind shield 25 of the radiation protection plate 12 is formed obliquely downward and the cross-sectional area of the air flow passage with the combustion chamber is made substantially the same, so that there is no resistance to the flow of air, and Since the warm air is smoothly blown out, the amount of air suctioned from the filter 29 is not reduced, and the combustibility is not affected.

Further, since the radiation protection plate 12 and the front panel 24 are formed of a metal material, the radiation protection plate 12 and the front panel 24 easily accumulate heat due to the heat conduction of hot air or radiant heat passing therethrough, and easily become high in temperature. In the oil fan heater according to the present invention, the air introduction passage 13 is formed above the combustion chamber in the main body 1, and a part of the air in the room sucked from the filter 29 on the back of the main body 1 is affected by the radiant heat due to the combustion. While receiving the air at a low temperature without passing through the air introducing passage 13 as shown by a dotted arrow in the figure,
Air flows at a low temperature without being affected by radiant heat due to combustion from a large number of small holes (slit holes) 26 above the radiation protection plate 12 of the louver mounting plate 19, and a part of the air flows through the radiation protection plate 12. Since it flows along the back surface, the front panel 24 and the radiation protection plate 12 can be efficiently cooled to lower the surface temperature. As a result, the front panel 24
Since the temperature is maintained at 0 to 80 ° C., it is possible to avoid an abnormal increase in the surface temperature of the front panel 24 provided facing the room, and it is possible to prevent a warmer from touching the front panel 24 and getting burned.

[0038]

As described above, according to the present invention, the heat generating means provided in the housing for radiating radiant heat, the indoor air is taken in, and the sucked air is blown into the indoor through the outlet provided in the lower part of the front of the housing. Heating means having a blower means for discharging air to the inside and a wind guide duct provided inside the body so as to receive heat from the heat generating means on the way from the heat generating means and discharge the air into the room from the outlet as warm air. A plurality of small holes are arranged on the vessel body front plate facing the means and separating the air guide duct,
Black heat-resistant paint that emits far-infrared rays is applied to the surface of the air guide duct. According to this configuration, soft radiant heat can be obtained through the small holes, and further, heating that is warmed from the body core by far infrared rays can be obtained.

Further, at least the air guide duct portion facing the small hole is a radiation plate as a separate component, and the radiation plate is coated with heat-resistant paint. According to this configuration, the area for applying the expensive heat-resistant paint is small, and by changing the material and the thickness, the amount of heat storage and thus the duration of the far-infrared radiation can be adjusted.

[0040] Further, a bypass path is formed so as to discharge the air taken in by the air blowing means between the front plate and the air guide duct. According to this configuration, the wind from the bypass path cools the front plate to eliminate the risk of burns and the like.

The bypass passage is provided adjacent to the air duct. According to this configuration, the wind in the bypass receives heat from the adjacent hot air guide duct, the moderately raised temperature rises, and the front panel also comes to an appropriate temperature, thereby providing comfortable heating.

In addition, a control device for energizing the heating means so as to adjust the amount of heat generated by the radiant heat and energizing the blowing means so as to adjust the amount of hot air blown based on the amount of generated heat is provided. A temperature sensor for detecting the temperature of the air, and after the external temperature detected by the temperature sensor reaches the set temperature, the amount of heat of the radiant heat radiated from the heat generating means is reduced and the temperature of the air blown by the air blowing means is reduced. With the control for adjusting the amount of the blown air to be small, the switching of the heating mode between the hot air heating and the radiant heating is performed based on the external temperature detected by the temperature sensor.

In addition, a shield plate is provided in a space between the front panel and an operation unit facing an external space for operating a driving state, and a convex portion is provided on a surface of the shield plate, so that foreign matter from outside can be obtained. However, there is no direct contact with the control device, there is no electrical danger and there is no stickiness.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an oil fan heater according to an embodiment of the present invention.

FIG. 2 is a schematic side sectional view of the oil fan heater of FIG. 1;

FIG. 3 is a block diagram of a control device for an oil fan heater according to the present invention.

FIG. 4 is an external perspective view of the louver mounting plate of the oil fan heater according to the present invention as viewed from the front.

FIG. 5 is a schematic perspective view showing a state where a front plate and a louver mounting plate are removed from the oil fan heater according to the present invention.

FIG. 6 is an external perspective view of a front plate of the oil fan heater according to the present invention.

FIG. 7 is a sectional view of the front plate taken along line AA of FIG. 6;

FIG. 8 is a view showing a state of attachment to a front panel and a front panel of FIG. 6;

FIG. 9 is a partially omitted front sectional view of an example of a conventional oil fan heater.

FIG. 10 is a schematic side sectional view of the oil fan heater of FIG. 9;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 oil fan heater main body 2 front plate 3 operation unit 4 outlet 4a louver 5 table 6 upper plate 7 burner 7a flame 8 flame sensor 9 combustion chamber 10 fan motor 10a blower fan 11a upper partition plate 11b upper partition plate front 11c upper heat shield Plate 12 Radiation protection plate (wind guide duct) 13 Air introduction path (bypass path) 13a Discharge port of air introduction path 14 Opening 15 Display unit 16 Control device 19 Louver mounting plate 20 Vaporizer 21 Fuel tank 22 Electromagnetic pump for fuel pressure feed Reference Signs List 24 Front panel (front panel) 25 Wind shield (radiating plate) 26 Small hole 27 Oil supply pipe 28 Room temperature thermistor (temperature sensor) 29 Filter 34 Panel reinforcing plate 35 Shielding plate 37 Opening

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Morikawa Mamoru F-term in Sharp Corporation (reference) 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka 3K003 KA04 KB04 LA01 NA04 3L028 AA02 AB01 AC01 EA01 EB01 EB04 EC01 ED01

Claims (5)

[Claims] A combustion chamber for vaporizing and burning a liquid fuel;
In a heating device having a heat generating means for radiating radiant heat, a front plate having an outlet opening, and a blowing means for sucking external air and discharging the air from the air outlet, the heat generating means includes: Heating equipment characterized by generating heat by receiving heat with warm air from a room. 2. The heat generating means is provided in a part of a passage from the combustion chamber to the air outlet, and is attached so that the width of the passage is substantially constant, and the heat generating means emits far-infrared rays to the surface by heat. The heating device according to claim 1, wherein a coating material is applied. 3. An air introduction passage for sucking external air without passing through the combustion chamber and guiding the air to the outlet, and the heat generating means is provided between an outlet of the air introduction passage and the front plate. 3. The heating apparatus according to claim 1, wherein an opening is provided in a part of the heating means from the outlet to the front surface. 4. A temperature sensor for detecting an external temperature, and after the external temperature detected by the temperature sensor reaches a set temperature, the amount of radiant heat radiated from the heat generating means is reduced and the air blowing is performed. The heating device according to any one of claims 1 to 3, further comprising a control device that adjusts the amount of hot air blown by the means to be reduced. 5. A heating means provided in the body for radiating radiant heat, a blowing means for sucking room air and discharging the sucked air into a room from an air outlet provided in a lower portion of a front surface of the body, and A heating duct having an air guiding duct provided in the body so as to receive heat from the heat generating means on the way and discharge it into the room through the outlet as warm air, wherein the heating device operates with the front plate having a number of small holes. Provide a shield plate in the space with the operation unit facing the external space to operate the state,
A heating device, wherein a projection is provided on a surface of the shielding plate.