JP3556529B2 - Heating equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heating device such as an oil fan heater.
[0002]
[Prior art]
Conventionally, petroleum fan heaters have been widely used in ordinary households as heating equipment in winter. FIG. 9 is a schematic partially omitted front sectional view of an example of a conventional oil fan heater, and FIG. 10 is a side sectional view thereof. As shown in FIG. 9, a fuel tank 102 for injecting and storing a liquid fuel 104 such as kerosene in advance is provided on the inside of the oil fan heater main body 101. A sufficient amount of liquid fuel 104 is supplied to the fuel tank 103 connected below. The liquid fuel 104 contained in the fuel tank 103 is guided to a carburetor 107 via an oil supply pipe 106 by driving a fuel pumping electromagnetic pump 105. The vaporizer 107 is heated by energizing a vaporizer heater (not shown), and vaporizes the sent liquid fuel 104. Reference numeral 109 denotes a combustion chamber, on which a burner 108 is supported and fixed at the bottom.
[0003]
The fuel gas vaporized by the vaporizer 107 is vigorously injected from a nozzle, and is introduced into the burner 108 together with combustion air. The fuel gas uniformly mixed with the air inside the burner 108 burns at the flame opening 108a, and the air in the combustion chamber 109 is heated by the obtained radiant heat. Then, as shown by an arrow in FIG. 10, the air was sucked through a filter 112 by a blower fan 111 provided on the back of the main body 1 and rotatably fixed to a rotation shaft of a fan motor 110 composed of a single-phase induction motor or the like. The indoor air is mixed with the heated air and the combustion gas in the heating chamber 109 and sent out as warm air from the outlet 113 into the room.
[0004]
The operation of the oil fan heater having the above configuration will be described. When the combustion of the fuel gas is started by the burner 108, the flame current of the combustion flame is detected by the frame sensor 114 provided slightly above the flame opening 108a. When a flame current equal to or greater than a preset value is detected, the fan motor 110 is energized, and after about 1.5 minutes, the fan motor 110 starts driving, and the blower fan 111 rotates to draw air from the room. The hot air is sent 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 based on the temperature difference between the room temperature and the set temperature, thereby the vaporizer 107 of the liquid fuel 104. The heating power of the combustion flame in the burner 108 is adjusted by changing the amount introduced into the burner 108. Therefore, when the operation of the petroleum fan heater is started, the room temperature rapidly reaches the set temperature, and thereafter, is kept constant near the set temperature.
[0005]
[Problems to be solved by the invention]
However, such a conventional oil fan heater has a problem in that only warm air is blown out from an outlet, and lacks a feeling of heating due to radiant heat when a part of a body such as a hand or a foot is cold. is there. In order to eliminate such inconvenience, there is also a heating device provided with a radiating portion that emits radiant heat separately from the outlet that blows out hot air, but since the hot air blowing portion and the radiant heat radiating portion are located separately, There has been no heating device that can simultaneously obtain a feeling of heating by radiant heat radiation and a feeling of heating by warm air. In addition, in the conventional oil fan heater, hot air is constantly blown out at a considerable wind speed, so when hot air hits the human body directly, many people, especially elderly people, are uncomfortable. During operation, noise due to the driving noise of the fan motor, the rotation noise of the blower fan, and the sound of the blowing of warm air leaked into the room and was very annoying.
[0006]
Therefore, an object of the present invention is to provide a heating device capable of obtaining a comfortable feeling of heating by providing a radiant heat radiating portion that also serves as a hot air blowing portion. In addition, the present invention does not delay the rise time of the room temperature immediately after the operation, and gradually radiates the radiant heat after the room temperature reaches the set value, thereby lowering the noise without discomfort due to the blown hot air. The purpose is to provide a simple heating device.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, a heating means for radiating radiant heat, and a blowing means for blowing air from the outside to the outside as warm air from an outlet by heating the air through the heating means. In the heating device having the radiation protection plate, a radiation protection plate having a large number of small holes is provided at an outlet corresponding to the heat generating means. The radiation protection plate may be provided over the entire surface of the outlet, or may be provided at a part of the outlet. According to this, warm air is blown from the outlet, and radiant heat is radiated forward through the radiation protection plate having a relatively large ventilation resistance. When the radiation protection plate is provided in a part of the outlet, if the opening is located below the outlet, the warm air is mainly blown from the lower opening, while the radiant heat passes through the upper radiation protection plate. By radiating heat, the feet are heated with warm air, and the fingers are held over the radiant heat.
[0009]
Further, 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 is blown by the air blowing means. And a control device for adjusting so as to reduce the amount of hot air to be blown. According to this configuration, the switching of the heating mode between the hot air heating and the radiant heating described above is performed based on the external temperature detected by the temperature sensor.
[0010]
In addition, a front panel having a plurality of small holes that covers at least the radiation protection plate is provided in front of the radiation protection plate and facing the external space. According to this, the radiant heat is transmitted through the radiation protection plate, is dispersed throughout the front panel, and is radiated from the small holes of the front panel. Further, the front panel is detachable from the main body, and is turned on / off in accordance with the attachment / detachment of the front panel.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. First, the configuration of the oil fan heater according to the present invention will be described. FIG. 1 is a front view of an example of an oil fan heater according to the present invention, and FIG. 2 is a side sectional view thereof. The oil fan heater main body 1 is formed integrally or separately with a front plate 2 (see FIG. 5) which forms the front surface of the main body 1 and is detachably provided, and side walls (not shown) at both ends in the width direction. It is defined by a casing composed of a top plate 6 and is mounted on a mounting table 5 that receives liquid fuel in the event of leakage.
[0012]
Further, on the front surface of the main body 1, an operation section 3 formed above the main body 1 for performing operation in a desired mode and setting the indoor temperature by performing key input operation, and a width slightly lower than substantially the center in the height direction. An opening 4 is formed to extend in the direction, and an outlet 4 from which warm air is blown out is provided. The combustion chamber 9 is defined by a front wall 17, a back wall 18, and side walls (not shown) at both ends in the width direction, and has a structure having an opening above. The front wall 17 and the back wall 18 surrounding the combustion chamber 9 are made of a heat-resistant material in consideration of the influence of radiant heat due to the combustion flame, or are coated with a heat-resistant material to improve durability for long-term use. I am planning. The combustion chamber 9 is separated from its lower part 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.
[0013]
Above the flame opening 7a of the burner 7, a frame sensor 8 for detecting the flame current of the combustion flame is provided, and the frame sensor 8 is connected to the control device 16. A room temperature thermistor 28 is provided at an arbitrary position in the back of the main body 1 and detects room temperature. The room temperature thermistor 28 is also connected to the control device 16. The control device 16 is composed of a general-purpose microcomputer. As shown in FIG. 3, the outputs of the room temperature thermistor 28 and the frame sensor 8 are input to the control device 16, and the outputs include the fan motor 10 and the fuel pressure feed. An electromagnetic pump 22 is connected. In this figure, circuits related to heating control are omitted.
[0014]
Reference numeral 11a denotes an upper partition plate for partitioning the combustion chamber 9 inside the main body 1 and the upper portion thereof, is formed to extend substantially horizontally from the back to the front, and has a structure that hangs down from the bent portion in the middle with a predetermined inclination. ing. An upper heat shield plate 11b is supported and fixed below the upper heat shield plate 11b so as to face the upper partition plate 11a. Therefore, the air introduction pipe 13 is formed in a space interposed between the upper partition plate 11a and the upper heat shield plate 11b. In addition, in front of the upper partition plate 11, a display unit 15 that forms a part of the operation unit 3 and displays an operation mode, a room temperature, and the like, and receives an input from the operation unit 3 to operate the device. A control device 16 equipped with a microcomputer for controlling and displaying various information on the display unit 15 is provided. A fan motor 10 is attached to the back of the main body 1 at the back of the combustion chamber 9, and a blower fan 10a is rotatably fixed to a rotating shaft thereof.
[0015]
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 from the front. As shown in FIG. 4, the louver mounting plate 19 has an opening 14 at a portion facing the combustion chamber 9. The length of the opening 14 in the height direction is 110 to 120 mm, and the radiation protection plate 12 is attached by welding, fitting, or the like so as to cover a portion 70 to 80 mm above the opening 14. This radiation protection plate 12 is provided with a large number of small holes (slit holes of 5 mm long × 10 mm wide, 60% aperture ratio) throughout, and the surface thereof is coated with a heat-resistant black system. . 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 its internal structure is difficult to read.
[0016]
A portion of the opening 14 below the radiation protection plate 12 serves as a hot air outlet, and a plurality of (two in this figure) louvers extend in the width direction of the louver mounting plate 19 including this portion. 4a are provided. Reference numeral 37 denotes a substantially rectangular opening provided substantially at the center of the louver mounting plate 19 in the height direction and near both side edges, and when the front panel 24 is mounted, the opening 37 is provided as described later. The stopper 34 of the front panel 24 has such a dimension and shape as to penetrate.
[0017]
FIG. 5 is an external perspective view of the front plate from the front. The front plate 2 is made of metal and is formed by press working. Above the blowout opening 4 formed approximately one-third below, the operating portion is provided when the front plate 2 is mounted on the main body 1. 3, a front panel 24 having a large number of small holes (round holes having a diameter of 2 to 3 mm, an opening ratio of 60%) formed over the entire surface except for the opening 44 is detachably provided. ing. That is, as shown in FIGS. 7 and 8, the claw portion 39 at the upper end of the front panel 24 is fitted into the slit portion 38 above the front plate 2, and the folded portion formed substantially horizontally at the lower end of the front panel 24. The front panel 24 can be attached to the front panel 2 with a single touch by pushing the hinge-type stopper 34 attached to the front panel 25 with screws or the like, and can be removed in the reverse order. A large number of ventilation holes 26 are formed in the folded portion 25.
[0018]
FIG. 6 is a front view showing a state in which the front plate and the louver mounting plate have been removed from the oil fan heater according to the present invention. A fuel tank 21 for receiving a supply of liquid fuel such as kerosene from a refueling tank (not shown) and storing a predetermined amount of liquid fuel is provided on a side in the main body 1. It is connected to the vaporizer 20 via the electromagnetic pump 22 for pressure feed and the oil feed pipe 27.
[0019]
Next, the operation of the oil fan heater having the above configuration will be described. When the operation switch (not shown) of the operation unit 3 of the oil fan heater is turned on and driven, the power supply to the vaporizer heater (not shown) attached to the vaporizer 20 is started, and the vaporizer 20 is heated. . At this time, the temperature of the vaporizer 20 is detected by a vaporizer thermistor (not shown). When the vaporizer 20 is heated to a preset vaporizer temperature, the fuel pump electromagnetic pump 22 is energized. . Then, the electromagnetic pump 22 is driven to pump up the liquid fuel in the fuel tank 21 and is sent to the carburetor 20 via the oil supply pipe 27. After the liquid fuel is gasified by the heated vaporizer 20, the liquid fuel is injected from a nozzle toward an opening of the burner 7, and is introduced into the burner 7 together with combustion air. The fuel gas mixed sufficiently with the air 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, the room temperature is detected by the room temperature thermistor 28, and the controller 16 controls the drive of the electromagnetic pump 22 to change the amount of liquid fuel to be sent to the vaporizer 20 based on the temperature difference between the room temperature and the set temperature. The amount of heat generated by radiant heat obtained by combustion is appropriately adjusted.
[0020]
When the flame sensor 8 detects a flame current equal to or greater than a preset current value after the combustion is started in the burner 7, the fan motor 10 provided on the back of the main body 1 is energized and the blower fan 10a rotates. The rotation speed is controlled by the control device 16. In this way, the rotation of the blower fan 10a starts, and accordingly, the air in the room is sucked from the filter 29 facing the external space on the back surface of the main body 1. The sucked indoor air deprives the radiant heat obtained in the combustion chamber 9, and further mixes with the combustion gas and is blown out as hot air from the outlet 4 to the outside of the main body 1, circulating in the room and raising the room temperature. .
[0021]
Hereinafter, the flow of air in the main body 1 will be described with reference to FIG. In a cold winter, when the temperature is very low, immediately after the operation switch (not shown) of the oil fan heater is turned on, the room temperature is considerably lower than the set temperature, and the room temperature needs to be rapidly raised. For this reason, the control device 16 increases the drive output of the electromagnetic pump 22 to increase the amount of liquid fuel sent to the vaporizer 20 to increase the combustion power of the combustion flame in the burner 7, and performs control in conjunction with the electromagnetic pump 22. The output of the fan motor 10 is also increased to increase the rotation speed of the blower fan 10a. As a result, as shown by arrow A in the drawing, hot air of 130 to 180 ° C. is blown out from the outlet 4 into the room vigorously, and the room temperature can be quickly raised to the set temperature.
[0022]
After the temperature in the room reaches the set temperature, the control device 16 lowers the drive output of the electromagnetic pump 22 to reduce the amount of liquid fuel sent to the carburetor 20, thereby weakening the combustion power of the combustion flame in the burner 7, and The output of the fan motor 10, which is controlled in conjunction with the electromagnetic pump 22, is also lowered to reduce the rotation speed of the blower fan 10a. As a result, radiant heat of a relatively low temperature is transmitted through the radiation protection plate 12 having a large number of small holes as shown by the arrow B in the drawing, is dispersed over the entire surface of the front panel 24, and is radiated into the room as a breeze. Can be kept substantially constant around the set temperature, and even if there is a warmer just before the oil fan heater, the discomfort caused by the hot air blown out can be eliminated. Also, compared to the conventional structure that constantly blows out hot air at a considerable wind speed, noise leaking into the room such as fan motor driving noise, blower fan rotation noise, and hot air blowing noise is reduced, so it is quieter. A desired heating effect can be obtained comfortably.
[0023]
In addition, 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 warm 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 pipe 13 is formed above the machine room 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 radiant heat due to combustion. As it flows through the air introduction pipe 13 as shown by a dotted arrow in the drawing and continuously flows to the radiation protection plate 12 and the front panel 24 without being subjected to the heat, it is efficiently cooled to reduce the surface temperature. Can be lowered. As a result, the surface temperature of the radiation protection plate 12 is maintained at about 100 ° C., and the front panel 24 is maintained at 70 to 80 ° C., so that the surface temperature of the front panel 24 provided facing the room is abnormal. It is possible to avoid an undesired rise and prevent an accident in which a warmer touches the front panel 24 and burns.
[0024]
Further, since the opening area of the filter 29 on the back of the main body 1 is made relatively smaller than that of the many small holes of the radiation protection plate 12, most of the dust and dirt in the air sucked in with the air is reduced. Especially when the oil fan heater is operated in a mode in which the radiant heat is sent from the front panel 24 to the room in a zigzag manner, some fine dust and dust passing through the filter 29 are removed by the radiation protection plate. 12 and adheres to the front panel 24, and these dusts and dusts accumulate over a long period of use, and some of the many small holes in the front panel 24 are blocked, and the surface temperature around the portion becomes abnormal. May rise. However, in the oil fan heater according to the present invention, since a large number of ventilation holes 26 are provided in the folded portion 25 at the lower end of the front panel 24, hot air leaks from the ventilation holes 26, and a portion where the front panel 24 is blocked. It is possible to prevent an abnormal rise in the surface temperature at the surface, and prevent the clogged dust or dust from scorching.
[0025]
Further, since the front panel 24 is detachably provided, the front panel 24 can be removed from the front plate 2 for cleaning. The procedure is as follows: the curl portion of the stopper 34 attached to the folded portion 25 at the lower end of the front panel 24. 34a (see FIG. 8) is pulled forward by pulling it forward, and the tab 39 at the upper end of the front panel 24 is pulled out from the slit 38 above the front plate 2 as shown in FIG. After dust and dirt are removed by suction with a vacuum cleaner, the front panel 24 is returned.
[0026]
Such an operation of attaching and detaching the front panel 24 is possible even while the oil fan heater is operating, and when the front panel 24 is attached, the tip of the stopper 34 closes the opening 37 of the louver attachment plate 19 as shown in FIG. By pressing a button 35a of a micro switch 35 which penetrates and is provided slightly behind the opening 37 and controls ON / OFF of the oil fan heater, the micro switch 35 is turned on to drive the oil fan heater. Let it. When the front panel 24 is removed from the front panel 2 during the operation of the oil fan heater, the pressing of the button 35a is released, and the microswitch 35 is turned off to stop driving the oil fan heater. This can prevent accidents such as receiving hot air with discomfort when attaching and detaching the front panel 24 and touching the stored high-temperature member to cause burns.
[0027]
In this embodiment, the case where the radiation protection plate is mounted so as to cover a part of the opening of the louver mounting plate has been described. However, the same effect can be obtained by disposing the radiation protection plate over the entire opening. Of course you can expect it. Further, instead of providing a large number of small holes in the radiation protection plate or the front panel, these may be formed in a mesh-like or honeycomb-like structure. Further, in this embodiment, the oil fan heater has been described as an example, but other heating devices such as a gas fan heater and a ceramic fan heater may have a similar structure.
[0028]
【The invention's effect】
As described above, according to the present invention, by disposing the radiation protection plate having a large number of small holes in the portion of the outlet corresponding to the heat generating means, the outlet has a ventilation resistance, When the momentum of the warm air blown by the blowing means is strong, while the warm air is blown out through the radiation protection plate while maintaining the momentum to some extent, when the blowing speed of the warm air is reduced, The radiant heat is slowly transmitted from the radiation protection plate and radiated forward. Therefore, the room can be quickly heated to the set temperature without delaying the rise of the room temperature immediately after the start of operation, and thereafter the room temperature can be kept substantially constant near the set temperature by radiating radiant heat on a breeze and radiating it. A fine and comfortable heating feeling can be obtained.
[0029]
Further, the switching of the heating mode between the hot air heating and the radiant heating is performed by a temperature sensor that detects a room temperature, and a control device that appropriately adjusts the outputs of the blowing unit and the heating unit based on the temperature sensor. And can be easily realized. By arranging a front panel having a number of small holes facing the external space in front of the radiation protection plate, a safe heating device capable of preventing accidents such as burns without impairing aesthetic appearance. Can be provided.
[Brief description of the drawings]
FIG. 1 is a front view of an example of an oil fan heater according to the present invention.
FIG. 2 is a schematic side sectional view of the 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 from the front of a louver mounting plate of the oil fan heater according to the present invention.
FIG. 5 is an external perspective view from the front of a front plate of the oil fan heater according to the present invention.
FIG. 6 is a schematic front 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. 7 is a partially omitted side sectional view of the oil fan heater according to the present invention.
FIG. 8 is an enlarged view of a main part of FIG. 7;
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. 8;
[Explanation of symbols]
REFERENCE SIGNS LIST 1 oil fan heater body 2 front plate 3 operation unit 4 outlet 4a louver 5 table 6 top plate 7 burner 7a flame 8 flame sensor 9 combustion chamber 10 fan motor 10a blowing fan 11a upper partition plate 11b upper heat shield plate 12 radiation protection Plate 13 Air introduction conduit 14 Opening 15 Display 16 Control device 20 Vaporizer 21 Fuel tank 22 Fuel pump electromagnetic pump 27 Oil feed pipe 24 Front panel 25 Folding section 26 Vent hole 29 Filter 31 Lower heat shield plate 32 Burner box 34 Stopper 35 Micro switch 37, 44 Opening

Claims (5)

A heating means for radiating radiant heat in the heating device and a blowing means for blowing the outside air sucked from the outside as hot air from the air outlet by heating through said-heating means,
A heating device, wherein an opening is formed below the outlet, and a radiation protection plate having a large number of small holes is provided at the outlet above the opening. In a heating device having a heating means for radiating radiant heat, and a blowing means for blowing air taken in from the outside to the outside as warm air from an outlet by heating the air through the heating means,
A heating device, wherein a radiation protection plate having a plurality of small holes through which the warm air passes is provided at the outlet. The heating according to claim 1 or 2, wherein a front panel having a plurality of small holes for covering at least the radiation protection plate is provided in front of the radiation protection plate and facing the external space. machine. 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 is blown by the air blowing means. The heating device according to any one of claims 1 to 3 , further comprising a control device that adjusts the amount of the hot air to be reduced. The heating device according to claim 3, wherein the front panel is detachable from a main body, and is turned on / off in accordance with the attachment and detachment of the front panel.

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