JP3534970B2 - Hot air heater - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot air heater for heating by burning fuel such as gas or petroleum. 2. Description of the Related Art Conventionally, in this type, a combustion section and a heat exchange air section provided in an apparatus main body are covered with a heat shield plate and fixed to a back plate of the apparatus main body. After the air blown by the convection fan exchanges heat with the combustion part and the heat exchange air part from the air inlet formed in the back plate through the back opening formed in the back part of the heat shield plate, the air is blown in front of the device body. The heating operation is performed by blowing out hot air from a hot air outlet of the panel, and the control is performed by a printed circuit board provided in the apparatus main body. Further, a heat shield plate for a tank is provided between the cartridge type oil supply tank housed in the main body of the equipment and the combustion part and the heat exchange air part. By arranging the heat shield plate in the apparatus main body such that a cooling passage is formed between the side plate and the back plate, a part of the air blown from the convection fan flows through the cooling passage, and In addition to cooling the back plate, the heat shield plate for the tank, and the heat shield plate, heat is not transmitted from the heat shield plate to the side plate, the back plate, and the heat shield plate for the tank as an air curtain. [0004] By the way, in this conventional device, when the size of the equipment main body is reduced, the side plates and the back plate of the equipment main body and the heat shield plate for the tank are not provided. The space between the heat shield and the heat shield cannot be cooled sufficiently. As a result, it is not enough to prevent heat from being transmitted from the heat shield plate to the side plate, the rear plate, and the tank heat shield plate as an air curtain. The temperature of the hot plate has risen. [0005] For this reason, if the burner touches the side plate or the back plate, or if the temperature of the cartridge-type refueling tank rises, especially if the temperature of the cartridge-type refueling tank rises, the fuel in the tank will be discharged. There is a disadvantage that the pressure in the tank increases due to vaporization, and a large amount of fuel oil is supplied to the oil pan, and the fuel oil spills out of the oil pan. Further, the temperature of the printed circuit board provided in the main body of the device also increases, and the printed circuit board is deformed.
There has been a drawback that the electronic component on the printed circuit board breaks down or malfunctions, so that the operation of the device main body is not performed normally. If the hot air outlet is provided below the front panel in order to reduce the size of the apparatus body, the hot air outlet and the floor surface come close to each other, and the hot air coming out of the hot air outlet remains at a high temperature. There was a drawback that the floor surface was heated to a high temperature. In order to solve the above-mentioned drawbacks, the present invention focuses on this point. In particular, the present invention has a structure in which a warm air outlet is formed in a front panel on the front surface of a substantially box-shaped device main body. At the same time, a convection fan faces the air inlet formed on the back plate of the back of the device main body, and a combustion unit and a heat exchanger unit are disposed in the device main body. The refueling tank and the tank are partitioned by a heat shield plate, and the heat shield plate is provided with a back opening that covers the back and side surfaces of the combustion unit and the heat exchanger unit and has a front opening and a back opening.
In a warm air heater in which a cooling path is formed between the inside of the device main body and the tank heat shield plate, the heat shield plate is provided with a tank heat shield plate side periphery of a back opening formed in the heat shield plate. , is located inside the air inlet of the back plate Rutotomoni, of the device body
A bottom plate constituting a bottom surface, and fixed on the bottom plate and
Cooling between the unit mounting plate where the combustion part is mounted
Providing a substrate storage part through which air in the road flows, and further comprising the bottom plate
Are formed with a plurality of lower outlet holes at the front end thereof. When the operation switch is pressed to start the operation, combustion is started, and at the same time as the combustion is started, the convection fan 28 is operated, and the blown air is supplied from the back of the main body 1 to the air inlet 3 of the back plate 4. And through the back opening 36 of the heat shield plate 30,
After heat exchange in the heat exchanger 23, the hot air is blown out from the hot air outlet 8 of the front panel 9 as hot air. At this time, a part of the back opening 36 on the side of the tank heat shield 13 is straightened to form a chord, so that the periphery of the back opening 36 on the side of the tank heat shield 13 becomes an air inlet. 3 is located on the inner side of the peripheral edge on the tank heat shield plate 13 side, whereby an air guide portion 37 is formed, and a part of the blown air is blocked from flowing toward the heat exchanger 23, and the rear plate It flows into the cooling passage 31 from the gap between the heat sink 4 and the heat shield plate 30, and flows mainly from the back cooling passage 32 toward the right cooling passage 34. A part of the blast air flowing into the cooling passage 31 is supplied to the air guide hole 3 formed in the back of the heat shield plate 30.
8 flows into the board storage portion 46 between the bottom plate 7 and the unit mounting plate 40 through the inflow hole 43 of the unit mounting plate 40. [0012] Then, from the cooling path 31 to the right side cooling path 34.
Most of the blown air that has flowed into the lower part of the bottom plate 7 after cooling the right side part of the heat shield plate 30 and the side part of the tank heat shield plate 13 so that the tank heat shield plate 13 is not overheated. The tank is blown out from the space 12 below the bottom plate 7 through the blowout hole 44 to the lower front of the apparatus main body 1 or the tank is heated from the right side of the heat shield plate 30 heated by the heat from the combustion unit 16 and the heat exchanger unit 22. It acts as an air curtain to prevent heat from being transmitted to the side portions of the heat shield plate 13, and flows out of the device main body 1 from a hot air outlet 8 of the front panel 9 or a gap between the bottom plate 7 and the front panel 9. To go. The blast air flowing from the cooling path 31 to the left side cooling path 33 prevents the left side plate 5 of the equipment body 1 from being overheated and the left side plate 5 of the equipment body 1 and the heat shield plate 30. After cooling the left side portion of the bottom plate 7, the lower outlet hole 4 of the bottom plate 7
4 and blows out from the space 12 below the bottom plate 7 to the lower front side of the device main body 1 or the left side plate 5 of the device main body 1.
It acts as an air curtain to prevent heat from being transmitted to the air outlet 39 of the side panel 5 of the apparatus main body 1, the hot air outlet 8 of the front panel 9, and the space between the bottom panel 7 and the side panel 5 and the front panel 9. And flows out of the device body 1 through the gap. Further, the blast air flowing from the air guide hole 38 of the heat shield plate 30 through the inflow hole 43 of the unit mounting plate 40 to the substrate storage section 46 between the bottom plate 7 and the unit mounting plate 40 is supplied to the unit mounting plate 40. After passing over the board protection member 49 covering the board mounting plate 45 fixed below the board 40, it passes from the space 12 below the bottom board 7 through the lower blowout hole 44 of the bottom board 7 to the device body. 1 is blown downward from the front. Next, a hot air heater according to the present invention will be described with reference to an embodiment shown in the drawings. 1 is a device body of a warm air heater, a top plate 2 provided with various buttons and a display unit, a back plate 4 having a circular air inlet 3 and an exhaust hole (not shown).
And left and right side plates 5 and 6, a bottom plate 7 on the bottom surface, a front panel 9 provided with a hot air outlet 8, and a leg 10 provided at a corner of the bottom surface of the bottom plate 7. It is installed indoors with a space 12 formed between the bottom plate 7 and the mounting table 11. Reference numeral 13 denotes a tank heat shield plate having a substantially L-shaped cross section.
The tank heat shield plate 13, the back plate 4, and the right side plate 6 form a storage space for a cartridge type tank 14 which is detachably stored, and stores a certain amount of fuel oil supplied from the cartridge type tank 14. It is provided on the upper part of the oil receiving tray 15 to be stored. Reference numeral 16 denotes a combustion unit, which burns fuel oil sent from the oil pan 15 by a fuel pump 17 and mixes and burns combustion air blown from a combustion air blower 18 with the burner unit 19. It comprises an outer cylinder 20 surrounding the combustion flame and guiding high-temperature exhaust gas generated by combustion. The opening of the burner 19 is fixed to the burner mount 21, and one end of the outer cylinder 20 is fixed to the burner mount 21. By doing so, they are integrated. Reference numeral 22 denotes a heat exchanger section, in which the heat of the exhaust gas is blown by passing the high-temperature exhaust gas guided by the outer cylinder 20 in communication with the combustion section 16 through an internal meandering exhaust gas passage. A heat exchanger 23 for efficiently exchanging heat with incoming air, a relay heat exchanger 24 connecting the heat exchanger 23 and the outer cylinder 20 of the combustion section 16, and an exhaust pipe formed in an exhaust hole formed in the back plate 4. An exhaust pipe 26 having one end fixed from the inside of the apparatus main body 1 by a mounting bracket 25, and a connection receiving section 27 for inserting and connecting the other end to exhaust the exhaust gas from the apparatus main body 1; In an integrated state, it is detachably fixed in the device main body 1. A convection fan 28 has a propeller fan 29 whose diameter is slightly smaller than the diameter of the air intake 3 of the back plate 4;
It consists of a blower motor (not shown) that rotates it,
The propeller fan 29 is fixed to the outside of the back plate 4 such that the center of the propeller fan 29 coincides with the center of the air inlet 3 of the back plate 4. Reference numeral 30 denotes a heat shield plate having a substantially U-shaped cross section. The cooling path 31 is formed by disposing a gap between the face plate 5 and the tank heat shield plate 13. The cooling passage 31 is provided between the back plate 4 and the heat shield plate 30.
A rear cooling path 32 formed by a rear part of the heat shield plate 30, a left side cooling path 33 formed by a left side part of the heat shield plate 30 and a part extending to the left side plate 5 of the device body 1, The right side cooling path 34 is formed by a right side part and a part extending to the side surface of the tank heat shield plate 13 of the equipment main body 1. A bell mouth 3 having the center aligned with the air intake 3 of the back plate 4 is provided on the back of the heat shield plate 30.
5 is formed, and the shape of the bell mouth 35 is not the same as the circular air inlet 3 formed in the back plate 4 but has the same diameter as the air inlet 3 of the back plate 4. A part of the circle on the tank heat shield plate 13 side is straightened to form a chord, so that the tank heat shield plate 1 in the rear opening 36 is formed.
The peripheral edge on the third side is located inside the peripheral edge of the air inlet 3 on the side of the tank heat shield 13, thereby forming an air guide portion 37, and a part of the blown air is directed toward the heat exchanger 23. The flow is interrupted, flows into the cooling passage 31 from the gap between the back plate 4 and the heat shield plate 30, and flows from the back cooling passage 32 mainly toward the right side cooling passage 34. Further, below the back portion of the heat shield plate 30,
Air guide holes 38 are formed on the left and right sides to allow a part of the blast air flowing into the rear cooling passage 32 to pass therethrough. Further, the side surface portion on the cartridge type tank 14 side constituting the right side cooling passage 34 of the heat shield plate 30 includes:
It is bent halfway from the upper part to the lower part so as to cover the exhaust pipe 26, and the bent part has the combustion part 16.
Is fixed to the right side cooling path 3
4 are formed. A plurality of ventilation holes 39 are formed on the side plates 5 and 6 of the device body 1 at the bent end portions of the front panel 9 side, and the bent end portions of the side plates 5 and 6 are heat shielded. Board 3
By screwing to the end of the “0”, play of the side plates 5 and 6 and the heat shield plate 30 is prevented, and the assembling strength is improved. Numeral 40 denotes a unit mounting plate, which is mounted on the upper surface of the bottom plate 7 and is integrated with the combustion section 16 and the heat exchanger section 22.
Are detachably fixed to the mounting surface 41, and are bent substantially at right angles to the mounting surface 41, on the left and right sides of the rear engaging portion 42 in contact with the lower rear surface of the heat shield plate 30, and on the upper surface of the bottom plate 7. When the unit mounting plate 40 is mounted, an inlet hole 43 is provided so as to be aligned with the air guide hole 38 of the heat shield plate 30,
A part of the blast air flowing into the rear cooling path 32 is
0 air guide hole 38 to inflow hole 4 of unit mounting plate 40
3 and flows to the lower surface side of the unit mounting plate 40. Reference numeral 44 denotes a lower outlet, which is a front panel 9 of the bottom plate 7.
A plurality of left side cooling passages 3 are provided in the side at substantially equal intervals in the lateral direction.
3 and the bottom plate 7 located on the right side cooling passage 34 are also provided with a lower outlet 44 in a substantially middle position between the gaps. Reference numeral 45 denotes a board mounting plate, which is detachably provided in a board storage section 46 formed between the bottom plate 7 and the unit mounting plate 40, and is a printed board 47 for controlling operation of the apparatus.
And a power transformer 48 for supplying power to the printed circuit board 47 and each electronic component in the device body 1 are detachably attached and integrated. Reference numeral 49 denotes a board protection member made of a soft plastic material or the like, which covers the printed board 47 and the power transformer 48 when the board mounting plate 45 is mounted in the main body 1 of the apparatus. In addition to preventing dust from adhering to the board 47 and the power transformer 48, the unit mounting plate 40 and the board protection portion 49 allow the dust to pass from the air guide hole 38 of the heat shield plate 30 to the inflow hole 43 of the unit mounting plate 40. This forms an air passage 50 through which the blown air passes. Next, the combustion operation of the warm air heater will be described. First, when the operation switch provided on the top plate 2 is pressed, the operation starts, and the heater of the burner section 19 is energized to increase the temperature. When the temperature of the burner section 19 increases to a preset temperature, the fuel Fuel oil is supplied from the pump 17 to the burner unit 19, and combustion air is supplied from the combustion air blower 18 to the burner unit 19, whereby the fuel oil and the combustion air are premixed and mixed in the burner unit 19. The air-fuel mixture blown out from a flame hole (not shown) located in the outer cylinder 20 above the burner 19 is ignited to start combustion. At the same time as the start of combustion, the convection fan 28
Is operated, and the air blown by the convection fan 28
After passing through the air inlet 3 of the back plate 4 and the back opening 36 of the heat shield plate 30 from the back and exchanging heat with the heat exchanger 23, the hot air is blown out from the hot air outlet 8 of the front panel 9. At this time, a part of the blown air is prevented from flowing toward the heat exchanger 23 by the air guide 37 formed on the tank heat shield plate 13 side of the rear opening 36 of the heat shield plate 30. Then, it flows into the rear cooling passage 32 of the cooling passage 31 from the gap between the rear plate 4 and the heat shield plate 30, most of which further flows into the right cooling passage 34, and the remaining part is A part of the blast air flowing into the left side cooling path 33 and into the both side cooling paths 33 and 34 passes from the air guide hole 38 of the heat shield plate 30 through the inflow hole 43 of the unit mounting plate 40 to be mounted on the unit. It flows toward the lower surface side of the plate 40. Most of the air blown to the right side cooling passage 34 is supplied to the right side portion of the heat shield 30 and the side portion of the tank heat shield 13 so that the tank heat shield 13 is not overheated. As well as the combustion section 16 and the heat exchanger section 22
The heat shield plate 30 serves as an air curtain so that heat is not transmitted from the right side portion of the heat shield plate 30 heated by the heat from the bottom plate 7 to the side portion of the tank heat shield plate 13. Through the space 12 below the bottom plate 7 and blows out to the front lower part of the device body 1 or blows out from the gap between the warm air outlet 8 of the front panel 9 and the bottom plate 7 and the front panel 9. It flows out of 1. The blast air flowing into the left side cooling passage 33 is used to prevent the left side plate 5 of the device main body 1 from being overheated, so that the left side plate 5 of the device main body 1 and the left side portion of the heat shield plate 30 are not heated. And also serves as an air curtain so that heat is not transmitted from the left side portion of the heat shield plate 30 heated by the heat from the combustion portion 16 and the heat exchanger portion 22 to the left side plate 5 of the device body 1. And the lower blowout hole 4 formed on the front panel 9 side of the bottom plate 7 forming the left side cooling passage 33.
4 flows through the space 12 below the bottom plate 7 of the device main body 1 and flows downward to the front of the device main body 1 and blows out.
What flows from the ventilation hole 39 of the side plate 4 of the device body 1 to the outside of the device body 1 through a hot air outlet 89 of the front panel 9 or a gap between the bottom plate 7 and the side plate 5 and the front panel 9. It is. Further, since the lower part of the right side cooling path 34 is formed by the burner mount 21 of the combustion part 16 and the part extending to the side surface of the tank heat shield plate 13, the right side cooling path 3 is formed.
The combustion air 18 and the burner 19 are cooled by the blast air flowing to 3 so that the temperature does not become high. The blast air flowing from the air guide hole 38 of the heat shield plate 30 through the inflow hole 43 of the unit mounting plate 40 and into the substrate storage portion 46 on the lower surface of the unit mounting plate 40 is connected to the unit mounting plate 40. The dust passes through the air passage 50 formed by the substrate protection member 49 and blows off the dust so that the dust does not adhere or accumulate on the substrate protection member 49. Further, while cooling the unit mounting plate 40 from the lower surface, This serves as an air curtain to prevent heat from being transmitted from the unit mounting plate 40 to the printed circuit board 47 and the power transformer 48. Most of the blast air that has passed through the air passage 50 passes from the lower blowout hole 44 of the bottom plate 7 through the space 12 below the bottom plate 7 of the device body 1, and
It flows down and blows out from the front of the camera. As described above, the combustion section 16 and the heat exchanger section 22
Back plate 4 and side plate 5 of equipment body 1 and heat shield plate 1 for tank
3, the air guide portion 37 of the rear opening 36 allows a part of the air blown from the convection fan 28 to flow into the cooling path 31 without fail, so that the heat shield plate 30 and the heat shield plate In addition to cooling the rear plate 4 and the side plate 5 and the tank heat shield plate 13 of the device main body 1 facing the device 30 with a gap therebetween, the heat shield plate 30 cools the rear plate 4 and the side plate 5 of the device main body 1 and the tank. Since heat is prevented from being transmitted to the heat shield plate 13, it is possible to prevent the side plate 5 and the back plate 4 of the device main body 1 from becoming hot. Accordingly, it is possible to prevent a burn due to touching the rear plate 4 and the side plate 5 and the like, and particularly, to prevent the blown air guided to the right side cooling passage 34 on the tank heat shield plate 13 side. By letting most of the fuel flow, the temperature of the cartridge-type refueling tank 14 adjacent to the tank heat shield plate 13 rises, and the fuel in the cartridge-type refueling tank 14 evaporates to increase the pressure in the tank. In addition, it is possible to reliably prevent a large amount of fuel oil from being supplied to the oil receiving tray 15 and to spill fuel oil from the oil receiving tray 15, thereby making the device body 1 compact. A part of the blast air guided to the cooling passage 31 passes from the air guide hole 38 of the heat shield plate 30 to the inflow hole 43 of the unit mounting plate 40, and the unit mounting plate 40 and the substrate protecting member. 49 and the air passage 50 formed by
, The dust is blown off so that dust does not adhere or accumulate on the substrate protection member 49, and further, the unit mounting plate 40 is cooled from the lower surface, and the unit mounting plate 40 serves as an air curtain and is printed from the unit mounting plate 40. Since the heat is not transmitted to the substrate 47 and the power transformer 48, the printed circuit board 47 and the power transformer 48 are mounted on the heat shield plate 30 covering the combustion unit 16 and the heat exchanger unit 22 by reducing the size of the device body 1. Even if approached, the printed circuit board 47 and the power transformer 48 can be prevented from being damaged by heat. Further, the blast air passing through the left side cooling path 33 and the right side cooling path 34 to cool the heat shield plate 30, the rear plate 4, the side plate 5, and the tank heat shield plate 13 of the equipment body 1, After passing through the air passage 50, the unit mounting plate 40 is cooled from the lower surface, and serves as an air curtain from the unit mounting plate 40 to the printed circuit board 47 and the power transformer 48.
The blast air, which prevents heat from being transmitted to the air, flows from the lower outlet hole 44 of the bottom plate 7 to the space 12 below the bottom plate 7 of the device body 1.
Through the lower part of the front surface of the device main body 1 and blown out, it is possible to prevent the high-temperature hot air from the hot-air outlet 8 from directly hitting the floor surface, thereby preventing the floor surface from becoming hot. The position of the hot air outlet 8 of the panel 9 can be made lower, so that the device body can be downsized. In this embodiment, the upper part of the side surface of the heat shield plate 30 on the cartridge type tank 14 side is the exhaust pipe 2.
6, the burner mounting base 21 of the combustion part 16 is fixed to the bent portion, but the present invention is not limited to this. Shape may be sufficient. In this embodiment, the air guide 37 is
The shape of the bell mouth 35 in the back opening 36 of the heat shield plate 30 is formed by forming a chord with a part of the circle on the side of the tank heat shield plate 13 having the same diameter as the air inlet 3 of the back plate 4 as a straight line. However, the present invention is not limited to this. The bell mouth 35 of the rear opening 36 of the heat shield plate 30 has the same diameter as the air intake 3 of the rear plate 4 and has the same diameter as the air intake 3 of the rear plate 4. It may be a circular shape whose center is shifted in a direction away from the cartridge type tank 14. As described above, the present invention provides a convection fan with a hot air outlet formed in a front panel on the front of a substantially box-shaped device main body and an air intake formed on a back plate on the rear of the device main body. And a combustion section and a heat exchanger section are disposed in the apparatus main body, and the combustion section, the heat exchanger section, and the cartridge-type refueling tank are partitioned by a tank heat shield plate. A heat shield plate that covers the back and side surfaces of the heat exchanger unit, opens on the front surface, and has a back opening on the back surface is provided.The heat shield plate is connected to the inside of the equipment body and the heat shield plate for the tank. in warm air heater forming a cooling path therebetween, said tank heat shield plate side peripheral edge of the rear opening formed in the heat shield plate, is located inside the air inlet of the back plate Rutotomoni, wherein Equipment bottom
A bottom plate forming a surface, and a fuel plate fixed on the bottom plate and
Cooling passage between the unit mounting plate to which the grill
A substrate storage part through which air inside is provided, and further, the bottom plate
Since a plurality of lower blowout holes are formed at the front end, air blown from the convection fan can be used even if the combustion unit or heat exchanger unit is placed close to the side plate or back plate of the equipment body. Part of the air flow into the cooling path, and most of the blown air flows into the tank heat shield plate side. As a result, the fuel in the tank evaporates and the pressure rises, which prevents the fuel from overflowing from the oil pan, and furthermore, the blast air guided to the cooling passage.
Some of the air flow from the air guide hole of the heat shield plate to the unit mounting plate
Through the opening, the unit mounting plate and this board protection member
By passing through the formed air passage, the substrate
Prevent dust from accumulating on the protective member
Blow off dust and cool the unit mounting plate from below.
A unit that plays the role of an air curtain together with ease
Heat is not transferred from the mounting plate to the printed circuit board or power transformer.
To reduce the size of the equipment itself,
Printed circuit boards and power supply
Even if the transformer approaches, printed circuit boards and power supply
Can be prevented from being damaged. Also left side cooling
Through the cooling path and the right-side cooling path
Blown air that has cooled plates, side plates, and heat shield plates for tanks,
When the unit mounting plate is cooled down from below through the air passage
Both serve as air curtains and unit mounting plate
From the heat to the printed circuit board and power transformer
The blown air from the bottom plate
Flows through the space under the board and down the front of the device
Hot air from the hot air outlet
The floor surface becomes hot by not directly hitting the floor surface
Position of the hot air outlet on the front panel
The device main body can be made smaller by setting it downward.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a forced air supply / exhaust type heater provided with one embodiment of the present invention. FIG. 2 is a front view showing the inside of the device main body. FIG. 3 is a front view showing a state where the combustion unit and the heat exchanger unit are removed. FIG. 4 is an essential part cross-sectional view showing a flow of air by the convection fan. FIG. 5 is an essential part cross-sectional view showing the flow of air in an air passage between the unit mounting plate and the bottom plate. FIG. 6 is an enlarged sectional view of an essential part of the part A. [Description of Signs] 1 Equipment main body 3 Air intake 4 Back panel 8 Front panel 9 Equipment main body 13 Heat shield plate for tank 14 Cartridge type oil supply tank 16 Combustion unit 22 Heat exchanger unit 28 Convection fan 30 Heat shield plate 31 Cooling path 36 back opening

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tokuzumi Hirono 7-7 Higashi Shinbo, Sanjo City, Niigata Prefecture Corona Co., Ltd. (56) References JP-A-4-3852 (JP, A) JP-A-9-236323 (JP, A) JP-A 6-40757 (JP, U) JP-A 60-48046 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24H 3/04 301 F24H 9 / 00 F24H 9/02 302

Claims (1)

(57) [Claims] [Claim 1] A convection fan is formed at a front panel of a substantially box-shaped device main body front surface at a front panel and at an air intake formed at a rear plate at a back surface of the device main body. A combustion section and a heat exchanger section are provided in the apparatus main body, and the combustion section and the heat exchanger section are separated from the cartridge type oil supply tank by a tank heat shield plate, and the combustion section and the heat exchange section are separated. A heat shield plate that covers the back and side surfaces of the container, opens at the front and has a back opening at the rear, and cools the heat shield between the inside of the equipment body and the heat shield for the tank in warm air heater forming a tract, the tank heat shield plate side edge of the rear opening portion formed in the heat shield plate, Ru is located inside the air inlet of the back plate
Together with a bottom plate constituting a bottom surface of the device main body, and the bottom plate
Unit which is fixed on
Board that allows air in the cooling passage to flow between the mounting plate
Part, and a lower outlet hole is provided at the front end of the bottom plate.
A warm air heater characterized by being formed in a plurality .