JP4725065B2 - Heat shield structure of hot air heater - Google Patents

Description

  The present invention relates to a heat shield structure for a warm air heater capable of preventing a temperature rise inside a frame and making the frame compact.

  A hot air outlet is located on the front of the frame, and an air flow passage is formed in the frame so that the wind of the indoor convection fan provided on the back of the frame flows to the hot air outlet, and continues to the burner, combustion chamber, and combustion chamber. The hot air heater is configured such that heat exchange between the heat exchanger and the air flowing through the air flow path causes hot air to blow out from the hot air outlet.

  Combustion control devices such as fuel supply means and combustion fans are arranged around the burner, which is a heat source, inside the frame, and these combustion control devices are heated by the effects of radiant heat and hot air from the burner and combustion chamber. In order to protect against burns, the heat source is surrounded by a heat shield or between the burner and the combustion control device to prevent the radiant heat of the burner from directly hitting the combustion control device, and the temperature of the combustion control device rises. Is preventing.

The burner is installed on a stand that also serves as the bottom plate of the frame. However, if the burner as a heat source is directly mounted on the stand, the temperature of the floor surface where the burner is attached is There is a problem that it rises due to the amount of heat generated. As countermeasures, there is a heat shield plate on the stand and a burner placed on the heat shield plate, or a heat shield plate added between the stand and the floor. The temperature rise of the floor surface is prevented from being transmitted directly to the floor surface (see Patent Document 1).
JP 2004-108665 A

  As mentioned above, adding a heat shield structure to prevent the floor surface and combustion control equipment from rising due to radiant heat from the burner and combustion chamber increases the number of parts and makes the structure inside the frame complicated. There is a need for a space for adding a heat shield structure, and there is a problem that hinders cost increase and downsizing of the frame.

  In addition, when the heater is an intake / exhaust type heater, the supply / exhaust port provided in the frame body and the intake / exhaust top attached to the wall of the room are connected by the intake / exhaust pipe. When arranged on the back side of the body, the connection portion between the air supply port and the intake pipe protrudes to the back side of the frame body, and the gap between the frame body and the wall surface is widened by the amount of protrusion of this connection portion. On the other hand, when the combustion fan is arranged in the frame, the protrusion of the connection portion between the air supply port and the intake pipe can be eliminated, but the frame shape becomes large.

  As described above, conventionally, since the frame shape is large even if the heater is installed away from the wall surface or near the wall surface, a large installation space is required, and the heater is installed indoors. There was a problem of overhanging and getting in the way.

This invention which solves the above-mentioned subject provides warm air outlet 2 in the front of frame 1, provides indoor convection fan 3 in the back of frame 1, and blows air which makes warm air outlet 2 and indoor convection fan 3 communicate A path 4 is provided in the frame body 1, a combustion chamber 6 is provided above the burner 5 disposed in the frame body 1, a heat exchanger 7 is provided above the combustion chamber 6, and a burner disposed in the frame body 1. A fuel supply means 8 for supplying fuel to the fuel 5, an air supply port 9 provided in the frame body 1 for sucking combustion air supplied to the burner 5, and a combustion fan for supplying the air sucked from the air supply port 9 to the burner 5 10, the amount of heat from the burner 5 and the air sent to the air flow path 4 by the indoor convection fan 3 exchange heat in the heat exchanger 7, and the hot air in the air flow path 4 is discharged indoors from the hot air outlet 2. in heater which, by placing the burner 5 on the bottom plate 4a of the air flow passage 4, the frame 1 Between the table 1a which also serves as a bottom plate and a bottom plate 4a of the air flow passage 4 forms a space A, and the space A heat dissipation portion formed in said burner 5 and the combustion chamber 6 and the heat exchanger 7 placed to Rutotomoni the partitioned said air flow passage 4, together with the mounting of the combustion fan 10 to the rear of the frame 1, to place the fan motor 10a for driving the combustion fan 10 in the space a The discharge portion 10b of the combustion fan 10 passes through the back surface of the frame 1 at a position above the bottom plate 4a of the blower passage 4 and is connected to the wind tunnel 11 of the burner 5 in the blower passage 4. it is characterized in that there.

  Further, a concave portion 1b is formed in the lower portion of the back surface of the frame body 1 toward the inside of the frame body 1, and the combustion fan 10 is attached to the concave portion 1b so that the combustion fan 10 is positioned inside the frame body 1 and the rear surface of the frame body. Therefore, the gap between the frame 1 and the wall surface can be reduced, and the heater can be installed near the wall surface.

  Further, the discharge part 10b of the combustion fan 10 is connected to the wind tunnel 11 of the burner 5, and an air control plate 12 is disposed at a position facing the discharge part 10b of the combustion fan 10 in the wind tunnel 11, and the discharge part 10b. The combustion air sent into the wind tunnel 11 passes between the lower part of the air control plate 12 and the bottom plate 4a of the air flow passage 4 and is supplied to the burner 5 so that the low-temperature combustion air is Since it can flow between the bottom plate 4a of the ventilation flow path 4 and the temperature rise of the bottom plate 4a of the ventilation flow path 4 by the radiant heat of the burner 5 can be prevented, the space A can be maintained at low temperature.

  Further, a wind direction plate 13 connected to the vicinity of the fan motor 10a disposed in the space A is provided in front of a part of the indoor convection fan 3, and a part of the wind of the indoor convection fan 3 is induced by the wind direction plate 13 and burned. By blowing air to the fan motor 10a of the fan 10, a low-temperature air flow is sent to the fan motor 10a and the fan motor 10a is cooled, so that an increase in temperature of the fan motor 10a can be prevented.

  In the present invention, a burner 5 serving as a heat source is disposed on a bottom plate 4 a of an air flow path 4 provided in a frame 1, and a space between a mounting table 1 a that also serves as a bottom plate of the frame body 1 and a bottom plate 4 a of the air flow path 4. Since the space A is formed, the space between the burner 5 and the mounting table 1a can be widened, and the mounting table 1a of the frame 1 is not directly heated by the heat of the burner 5, thereby preventing the temperature of the floor surface from rising. Therefore, it is no longer necessary to add a heat shield structure between the burner 5 and the mounting table 1a or between the mounting table 1a and the floor surface.

  Moreover, since the radiant heat of the burner 5 is interrupted by the bottom plate 4a and the side plate of the air flow channel 4 by arranging the burner 5 in the air flow channel 4, the heat shield structure for preventing the temperature rise of the combustion control device is It became unnecessary, and the number of parts was greatly reduced, resulting in cost reduction.

  Moreover, since the heat radiating portion is constituted by the burner 5, the combustion chamber 6 and the heat exchanger 7, and the heat exchange is performed in the entire heat radiating portion, the overall shape of the heat radiating portion can be reduced while maintaining the heat exchange efficiency. Even if the mounting position of the burner 5 is increased, the frame body 1 does not become taller. By arranging the fan motor 10a of the combustion fan 10 in the space A, the combustion control device in the frame body 1 can be The arrangement efficiency was improved, the depth and lateral dimensions of the frame 1 could be shortened, and the heater could be made compact.

  Moreover, since the recessed part 1b is formed toward the inside of the frame 1 in the lower back part of the frame 1 and the combustion fan 10 is attached to this recessed part 1b, the combustion fan 10 is located inside the frame 1, so that the frame 1 can eliminate the protrusion of the back surface of 1 and the space between the back surface of the frame 1 and the wall surface when the heater is installed becomes narrow so that the heater can be installed near the wall surface. Space could be reduced.

  In addition, when the burner 5 is installed on the bottom plate 4a of the air flow passage 4, there is a risk that the atmospheric temperature in the space A is increased by the radiant heat from the bottom plate 4a heated by the combustion heat of the burner 5. An air control plate 12 is disposed at a position facing the discharge part 10b of the combustion fan 10 connected to the cylinder 11, and the combustion air sent from the discharge part 10b into the wind tunnel 11 is below the air control plate 12 and the air flow path 4. Since the low temperature combustion air flows in the vicinity of the bottom plate 4a of the air flow passage 4 and the heat of the burner 5, the bottom plate 4a of the air flow passage 4 passes between the bottom plate 4a and the burner 5. Therefore, the space A can be maintained at a low temperature, so that the temperature of the mounting table 1a and the fan motor 10a of the combustion fan 10 can be prevented.

  In addition, a wind direction plate 13 that communicates with the vicinity of the fan motor 10 a of the combustion fan 10 disposed in the space A is provided in front of a part of the indoor convection fan 3, and a part of the wind of the indoor convection fan 3 is guided by the wind direction plate 13. Since air that has not been subjected to heat exchange is blown to the fan motor 10a, the fan motor 10a that generates heat during operation can be cooled to prevent the temperature of the fan motor 10a from rising, and the operation of the fan motor 10a can be stabilized. Since the air can flow in the frame 1, the warmed air in the frame 1 can be easily discharged outside the frame 1, and the inside of the frame 1 can be maintained at a low temperature.

  The present invention will be described with reference to an embodiment of an intake / exhaust type heater shown in the drawing. Reference numeral 1 denotes a frame of the heater, 5 denotes a burner arranged in the frame 1, 6 denotes a combustion chamber arranged above the burner 5, 7 is a heat exchanger arranged in the upper part of the combustion chamber 6, and the burner 5, the combustion chamber 6, and the heat exchanger 7 constitute a heat radiating section.

  Reference numeral 1a denotes a pedestal that also serves as a bottom plate of the frame 1. Reference numeral 8 denotes a fuel supply means composed of a constant oil level device arranged on the pedestal 1a in the frame 1 and an electromagnetic pump attached to the upper part. A fuel pipe 14 a provided between the supply means 8 and a nozzle 14 a provided at the tip of the fuel pipe 14 is pumped up by a fuel supply means 8 and supplied to the burner 5.

  9 is an air supply port provided on the back surface of the frame 1, 15 is an exhaust port provided near the air supply port 9, 16 is an intake pipe connected to the air supply port 9, 17 is an exhaust pipe connected to the exhaust port 15, Reference numeral 18 denotes an intake / exhaust top mounted through the wall, 10 is a combustion fan for supplying combustion air to the burner 5, and in the embodiment shown in the figure, the combustion fan 10 is attached to the back surface of the frame 1, and this combustion An air supply opening 9 is provided in the fan 10. Outdoor air sucked by the combustion fan 10 from the intake / exhaust top 18 through the intake pipe 16 is sent to the burner 5 for combustion, and the combustion gas generated in the burner 5 exchanges heat with indoor air in the heat radiating section. After that, it is discharged from the intake / exhaust top 18 through the exhaust pipe 17 to the outside.

  The burner 5 of the embodiment shown in the figure is composed of a pot type burner, 19 is a bottomed cylindrical pot where the fuel sent to the burner 5 ignites and burns, 19a is opened on the side wall of the pot 19 A large number of air holes 11 are wind tunnels that surround the outer periphery of the pot 19, and the combustion air sent into the wind tunnel 11 by the combustion fan 10 is supplied into the pot 19 from the air holes 19 a.

  Reference numeral 20 denotes an ignition heater that preheats the bottom surface of the pot, and vaporizes and ignites the fuel, which is attached to the bottom surface of the pot 19 with a gap from the bottom surface. The ignition heater 20 is energized to preheat the pot 19 and the fuel supply means 8 The combustion fan 10 is actuated to send fuel and air into the pot 19, and the fuel vaporized at the bottom surface of the pot 19 at a high temperature is mixed with the air supplied from the air holes 19 a and burned.

  21 is an air intake provided on the back of the frame 1, 2 is a hot air outlet provided on the front of the frame 1, 3 is an indoor convection fan disposed in the air intake 21 on the back of the frame 1, 4 is indoors It is a ventilation channel that communicates the convection fan 3 and the hot air outlet 2, and when the indoor convection fan 3 is operated, indoor air is sent into the ventilation channel 4 by the indoor convection fan 3, and a heat radiating part in the ventilation channel 4 When it passes, it becomes warm air and blows out into the room from the warm air outlet 2.

  By the way, in the structure of the conventional hot air heater, the burner 5 serving as a heat source is mounted on a table 1a below the air flow path 4, and the combustion control of the fuel supply means 8, the combustion fan 10, etc. around the burner 5. In general, the device is arranged, but in this structure, the distance between the burner 5 as a heat source and the mounting base 1a is short, and the fuel supply means 8 and the combustion fan 10 arranged in the frame 1 are close to the burner 5. In order to prevent this problem, there is a problem of a rise in the temperature of the floor surface where the heater is installed and a rise in the temperature of the combustion control device such as the fuel supply means 8 and the combustion fan 10 arranged in the frame 1. A heat shield structure for protecting from the heat of the burner 5 is required, and the number of parts and the structure become complicated, leading to an increase in cost.

  The present invention solves the above-mentioned problems. Reference numeral 4a denotes a bottom plate of the air flow path 4 formed in the frame 1, and a burner 5 is disposed on the bottom plate 4a. The burner 5, the combustion chamber 6, and the heat The exchanger 7 is disposed in the air flow path 4, and a space A is formed between the bottom plate 4 a of the air flow path 4 and the mounting base 1 a of the frame 1, and the space A is attached to the back surface of the frame 1. Further, the configuration is such that the fan motor 10a of the combustion fan 10 is located.

  Thus, since the distance between the burner 5 and the mounting table 1a can be secured by installing the burner 5 on the bottom plate 4a of the air flow path 4, the temperature of the mounting table 1a and the floor surface due to the radiant heat from the burner 5 can be increased. It became something that could be prevented. Further, since the burner 5 is surrounded by the air flow passage 4 and is partitioned from the fuel supply means 8 and the fan motor 10a of the combustion fan 10, the temperature of the fuel supply means 8 and the combustion fan 10 is increased by the radiant heat of the burner 5. Can be prevented.

  Further, in the structure in which the conventional burner 5 is installed on the mounting table 1a, since the through hole of the burner 5 is formed in the bottom plate 4a of the air flow path 4, a gap is generated between the bottom plate 4a and the burner 5, and the air flow path 4 Although some of the warm air flowing inside flows into the frame body 1 from this gap and raises the temperature in the frame body 1, in the present invention, the burner 5, the combustion chamber 6, and the heat exchanger 7 are Since it is surrounded by the air flow path 4, the hot air flowing through the air flow path 4 does not flow out into the frame body 1, and the temperature rise in the frame body 1 can be prevented.

  And in this structure, since the ventilation flow path 4 serves also as the heat insulation structure of the burner 5, the heat insulation structure between the burner 5 and the mounting base 1a becomes unnecessary, and the burner 5 is enclosed as in the prior art. Parts such as heat shields that were placed between the engine and the combustion control equipment are no longer required, and the number of parts can be greatly reduced, resulting in cost reduction.

  Moreover, by installing the burner 5 on the bottom plate 4a of the air flow path 4, the burner 5, the combustion chamber 6 and the heat exchanger 7 as a whole become a heat radiating portion, and not only the heat exchanger 7 but also the burner 5 and the combustion chamber. 6 can also perform heat exchange, so that the heat exchange efficiency can be maintained even if the shape of the heat radiating portion is set small, and the height of the frame 1 is kept low even when the mounting position of the burner 5 is high. I was able to.

  Further, since the fan motor 10a of the combustion fan 10 is disposed in the space A below the bottom plate 4a of the air flow path 4 in which the burner 5 is installed, fuel supply means is provided on the side of the air flow path 4 in the frame 1. It is only necessary to secure a space that can be installed in the frame 8, and the depth and width of the frame 1 can be reduced. Therefore, the frame 1 can be made compact.

  When installing the heater, when the combustion fan 10 is attached to the back of the frame 1, the connection between the air inlet 9 and the intake pipe 15 protrudes from the back of the frame 1, and the protruding portion of this connection Only the gap between the back surface and the wall surface of the frame body 1 is widened, the heater is installed at a position away from the wall surface, and a large installation space is required even if the frame body 1 is made compact.

  Reference numeral 1b denotes a recess formed in the lower part of the back surface of the frame 1, and a combustion fan 10 is attached to the recess 1b. Since the combustion fan 10 attached to the recess 1b is located on the inner side of the back surface of the frame body 1, the connecting portion between the air inlet 9 and the intake pipe 15 does not protrude from the back surface of the frame body 1, and a heater is installed. When this is done, the gap between the back surface of the frame 1 and the wall surface can be narrowed, and the heater can be installed near the wall surface, so the installation space for the heater can be reduced.

  Further, the bottom plate 4a of the air flow path 4 provided with the burner 5 is likely to become high temperature due to the heat of the burner 5, and the ambient temperature of the space A is raised by the radiant heat from the bottom plate 4a. It is necessary to prevent the rise. Reference numeral 10b denotes a discharge portion of the combustion fan 10 connected to the wind tunnel 11 of the burner 5, and 12 denotes an air control plate disposed in the wind tunnel 11 so as to face the discharge portion 10b of the combustion fan 10. The air control plate 12 The upper part is connected to the upper surface of the pot 19, and a gap is formed between the lower part of the air control plate 12 and the bottom plate 4 a of the air flow path 4. In this configuration, the combustion air sent from the discharge portion 10 b into the wind tunnel 11 by the combustion fan 10 is directed downward by the air control plate 12, and passes between the lower portion of the air control plate 12 and the bottom plate 4 a of the air flow path 4. And supplied to the pot 19.

  With this configuration, a low-temperature air flow is formed between the bottom of the pot 19 and the bottom plate 4 a of the air flow path 4, thereby preventing an increase in the temperature of the bottom plate 4 a of the air flow path 4 due to the radiant heat of the burner 5. Thus, the temperature rise of the space A due to radiant heat from the bottom plate 4a can be prevented.

  In FIG. 2, reference numeral 13 denotes a wind direction plate that connects a part of the indoor convection fan 3 in front and the vicinity of the fan motor 10 a of the combustion fan 10 disposed in the space A. A part of the wind sent to the wind direction plate 13 changes the flow toward the fan motor 10a.

  Generally, the fan motor 10a generates heat during operation and becomes high temperature. When the temperature rises, the operation becomes unstable and the fan motor 10a cannot operate normally. Since the low-temperature wind before the replacement blows, the fan motor 10a is cooled and temperature rise can be prevented, and the operation of the fan motor 10a is stabilized.

  Further, in order to prevent the temperature inside the frame body 1 from rising due to the heat generated from the fan motor 10a and the radiant heat from the blower passage 4, the air inside the frame body 1 and the air outside the frame body 1 are provided in the outer shell of the frame body 1. Many air holes are opened so that the exchange of the air can be easily performed. The air in the cold room flows into the frame body, and the warmed air flows out of the frame body 1 by natural convection. However, when the wind direction plate 13 is provided as described above, an air flow is formed in the frame 1 so that the air in the frame 1 can be actively exchanged. Thus, the inside of the frame 1 can be more reliably maintained at a low temperature.

It is the left view represented with the longitudinal cross-section of the intake / exhaust type heater which shows the Example of this invention. It is the front view represented with the longitudinal cross-section of the Example shown in FIG. It is a cross-sectional view of the embodiment shown in FIG. It is the right view represented with the longitudinal cross-section of the Example shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame 1a Stand 2 Hot air blowout outlet 3 Indoor convection fan 4 Air flow path 4a Bottom plate 5 Burner 6 Combustion chamber 7 Heat exchanger 8 Fuel supply means 9 Air supply port 10 Combustion fan 10a Fan motor 10b Discharge port 11 Wind tunnel 12 Air Control plate 13 Wind direction plate

Claims (4)

A hot air outlet 2 is provided on the front surface of the frame 1, and an indoor convection fan 3 is provided on the back surface of the frame 1,
An air flow path 4 that communicates the hot air outlet 2 and the indoor convection fan 3 is provided in the frame 1.
A combustion chamber 6 is provided above the burner 5 disposed in the frame 1, a heat exchanger 7 is provided above the combustion chamber 6, and
Fuel supply means 8 for supplying fuel to the burner 5 disposed in the frame 1;
An air supply port 9 provided in the frame 1 for sucking combustion air supplied to the burner 5;
A combustion fan 10 for supplying air sucked from the air supply port 9 to the burner 5;
In the heating machine in which the amount of heat from the burner 5 and the air sent to the air flow path 4 by the indoor convection fan 3 are heat-exchanged by the heat exchanger 7 and the warm air in the air flow path 4 is discharged from the warm air outlet 2 into the room.
The burner 5 is disposed on the bottom plate 4a of the air flow path 4, and a space A is formed between the mounting table 1a that also serves as the bottom plate of the frame 1 and the bottom plate 4a of the air flow path 4.
Placed to Rutotomoni to the burner 5 and the combustion chamber 6 and the air flow passage 4 which is a space A partitioned heat radiation portion constituted by said heat exchanger 7,
The combustion fan 10 is attached to the back surface of the frame 1,
With arranging the fan motor 10a for driving the combustion fan 10 in the space A,
A discharge portion 10 b of the combustion fan 10 passes through the back surface of the frame 1 at a position above the bottom plate 4 a of the blower passage 4 and is connected to the wind tunnel 11 of the burner 5 in the blower passage 4. A heat shield structure for a hot air heater characterized by that.   The heat insulation structure for a warm air heater according to claim 1, wherein a recess 1b is formed in the lower part of the back surface of the frame 1 toward the inside of the frame 1 and a combustion fan 10 is attached to the recess 1b. . The discharge portion 10b opposed to the position of the combustion fan 10 before Symbol air cylinder 11 to place the air control plate 12, the combustion air delivered from the discharge portion 10b in wind tunnel 11 is fed to the lower air control plate 12 The heat shield structure for a hot air heater according to claim 1, wherein the heat shield structure is supplied to the burner (5) through a space between the bottom plate (4a) of the wind passage (4). A wind direction plate 13 is provided in front of a part of the indoor convection fan 3 so as to communicate with the vicinity of the fan motor 10a disposed in the space A.
The heat insulation structure for a hot air heater according to claim 1, wherein a part of the wind of the indoor convection fan (3) is guided to the wind direction plate (13) and blown to the fan motor (10a) of the combustion fan (10).

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