JP6990128B2 - Hot air heater - Google Patents

Description

The present invention relates to a hot air heater that heats by exchanging heat between exhaust gas generated by combustion of fuel such as petroleum and indoor air.

Conventionally, in this type of thing, outdoor air is supplied to the combustion part and fuel is supplied to the combustion part to burn it, and the combustion gas is passed through the combustion cylinder having the combustion part and connected to the combustion cylinder. After supplying to the heat exchanger, it is exhausted to the outside as exhaust gas, and the indoor air is sent to the heat exchanger by a convection fan, and then sent to the heat exchanger that has become hot due to the combustion gas passing through the inside. In some cases, the air in the room was exchanged for heat, and the air in the room that was sent became warm air to heat the room.

As for the arrangement of the combustion cylinder having the combustion portion and the heat exchanger, there is one in which the combustion cylinder is arranged long in the vertical direction and the heat exchanger is arranged long in the vertical direction next to the combustion cylinder. (For example, Patent Document 1)
Further, in order to further improve the heat exchange efficiency of the heat exchanger, there is a case in which a plurality of flat box-shaped heat exchangers are arranged side by side so that the short side is in the front-rear direction. (For example, Patent Document 2)

Special Fair No. 04-16691 Japanese Unexamined Patent Publication No. 08-247552

By the way, in this conventional one, when trying to miniaturize the main body of the appliance, the distance between the combustion part and the main body becomes narrow and heat tends to be trapped, and in order to further miniaturize the main body of the appliance, there is also a convection fan that cools the appliance. Since the size is reduced and the amount of air passing through the equipment is reduced, the amount of air that hits the combustion cylinder is reduced, the exhaust temperature of the combustion gas becomes high, and the ignition electrode provided in the combustion cylinder and the frame rod that detects ignition are used. There is a problem that the air volume that hits the electrode set is reduced, the exhaust temperature of the combustion gas becomes high, and the air volume that hits the electrode set is reduced, so that the electrode set becomes hot.

In order to solve the above problems, in claim 1, the present invention comprises a lower plate, a front panel provided with an outlet for blowing warm air substantially in the center of the front surface, a right side plate, a left side plate, a top plate, and a back plate. A vertically long body consisting of a face plate, a burner portion that burns by receiving fuel and combustion air, and a lower end connected to the upper part of the burner portion to guide the combustion gas of the burner portion as exhaust gas. A heat exchanger that is juxtaposed with the outer cylinder and exchanges heat with a blower that circulates combustion gas from the outer cylinder and circulates around the outer cylinder, and the upper end of the outer cylinder and the upper end of the heat exchanger. An exhaust chamber that sends the exhaust gas that has passed through the outer cylinder into the heat exchanger , and an upper heat shield plate, a left heat shield plate, and a right heat shield plate that are provided inside the hot air heater main body. A combustion chamber in which the outer cylinder, an exhaust chamber, and a heat exchanger are arranged inside, and a convection fan provided on the back plate and blowing indoor air to the outer periphery of the heat exchanger and the outer cylinder. In the provided hot air heater, a blower guide plate is provided on the left heat shield plate or the right heat shield plate close to the outer cylinder.

Further, in claim 2, an electrode set including an ignition plug and a frame rod for detecting ignition is provided in the lower part of the outer cylinder, and the blower guide plate is provided so as to be inclined so that the upper side approaches the back plate. The lower end of the blower guide plate is provided so as to be located in the vicinity of the electrode assembly.

Further, in claim 3, the combustion chamber is provided with a back heat shield plate having a vent formed in the upper part through which air blown from the convection fan passes, and ventilation for electrode assembly is provided in the lower part of the back heat shield plate. It formed the mouth.

According to claim 1 of the present invention, since the blower guide plate is provided on the left heat shield plate or the right heat shield plate close to the vertically long outer cylinder that guides the combustion gas of the burner portion as exhaust gas, the left shield from the convection fan. The air flowing toward the hot plate or the right heat shield plate hits the blower guide plate and is guided toward the outer cylinder and flows toward the outer cylinder, whereby the outer cylinder is sufficiently cooled and the exhaust temperature of the combustion gas becomes high. Can be prevented.

Further, according to claim 2, an electrode set including an ignition plug and a frame rod for detecting ignition is provided in the lower part of the outer cylinder, and the blower guide plate is provided so as to be inclined so that the upper side approaches the back plate. At the same time, since the lower end of the blower guide plate is provided so as to be located near the electrode assembly, the air flowing from the convection fan toward the left heat shield plate or the right heat shield plate hits the blower guide plate and is guided toward the outer cylinder. By flowing toward the outer cylinder and thereby sufficiently cooling the outer cylinder, it is possible to prevent the spark plug of the electrode set whose tip is located inside the outer cylinder and the frame rod for detecting ignition from becoming hot. It is a thing.

In addition, a part of the air that hits the blower guide plate descends along the inclination of the guide portion of the blower guide plate and hits the electrode set to cool the electrode set, thereby detecting the spark plug and ignition of the electrode set. It is possible to prevent the frame rod from becoming hot.

Further, according to claim 3, the combustion chamber is provided with a back heat shield plate having a vent port formed at the upper part through which air blown from the convection fan passes, and an electrode assembly is provided at the lower part of the back heat shield plate. Since the ventilation port is formed, the air blown from the convection fan passes through the ventilation port for the electrode assembly and goes straight to hit the electrode assembly of the outer cylinder, whereby the electrode assembly can be further cooled.

The front view of the hot air heater which shows one Embodiment of this invention. Front view with the front panel removed. Same rear view. The rear view with the back plate removed. A cross-sectional view of a main part showing the inside of the combustion chamber. Cross-sectional view of the main part showing the ventilation port on the same side surface.

Next, the hot air heater according to the present invention will be described with reference to an embodiment shown in the drawings.
Reference numeral 1 denotes a hot air heater main body, which is provided with an exhaust port 2 for blowing hot air in the center of the front surface, and a plurality of buttons such as an operation switch 3 and a temperature setting switch 4 and a display unit 5 for displaying temperature and time at the upper part of the front surface. An operation / display unit 6 that is integrated with the above is provided, and on the back side, an air supply unit (not shown) for supplying outdoor air to the hot air heater and the exhaust gas of the hot air heater are installed. An exhaust pipe 7 for connecting an air supply / exhaust pipe (not shown) including an exhaust unit (not shown) for exhausting to the outside and an air supply pipe 8 are provided, and the lower plate 9 and the front surface are omitted. It is composed of a front panel 10 having an exhaust port 2 for blowing warm air in the center, a right side plate 11, a left side plate 12, a top plate 13, and a back plate 14.

Reference numeral 15 is a fuel supply unit, which is a main tank (FIG. 15) which is formed of the right side plate 11, the back plate 14, and a substantially L-shaped fuel supply unit heat shield plate 16 and is installed outdoors or the like below. A leveler tank 17 that stores a predetermined amount of fuel oil supplied from (not shown), a fuel pump 18 that is a fuel supply means for supplying fuel oil in the leveler tank 17 to the upper part of the leveler tank 17, and fuel oil from the main tank. A pump 19 is provided in the leveler tank 17, and a control unit 20 made of a printed substrate is attached to the front portion of the heat shield plate 16 of the fuel supply unit.

In this embodiment, no particular parts or the like are arranged in the space inside the fuel supply unit 15, but the fuel is not in the main tank but in the cartridge type tank (not shown) that can be attached to and detached from the hot air heater main body 1. In the model to be supplied, a cartridge type tank is stored in the space inside the fuel supply unit 15, and instead of the leveler tank 17, an oil pan (not shown) for storing a predetermined amount of fuel oil in the cartridge type tank is arranged. It is designed so that the same hot air heater main body 1 can be used even if the model is different.

Reference numeral 21 is a combustion unit, which is connected to a burner unit 23 that burns by kerosene sent from the fuel pump 18 and combustion air sent from the combustion blower 22, and one end connected to the upper part of the burner unit 23. It is composed of an outer cylinder 24 that guides combustion gas as exhaust gas.

Reference numeral 25 is a box-shaped exhaust chamber, and the other end of the outer cylinder 24 is attached to the right side, and a partition plate (not shown) for bypassing and passing the exhaust gas flowing from the outer cylinder 24 is provided inside. It is a thing.

Reference numeral 26 is a heat exchanger, which is provided on the left side of the exhaust chamber 25, and one end of each heat exchange portion 27 of the three flat box-shaped heat exchange portions 27 is connected to the exhaust chamber 25 and the heat exchange portion 27 is connected. The short side is provided side by side so as to be in the front-rear direction, and the heat exchange portions 27 are provided diagonally so that the front side is separated from the outer cylinder 24 from the rear side. It is provided diagonally at the angle of.

Further, in each of the heat exchange portions 27, a plurality of recesses 28 formed by abutting recesses from both long sides at the center of the inside are arranged in a staggered pattern, and a plurality of meandering paths (shown in the figure). It forms a).

Reference numeral 29 denotes an exhaust collecting chamber provided in the lower part of the heat exchange unit 27 for recollecting the exhaust gas after the circulation of each heat exchange unit 27, and from a single plate in which the exhaust gas from each heat exchange unit 27 collides. A rectifying plate (not shown) is provided, and the bottom is connected to the exhaust part of the air supply / exhaust pipe that communicates with the outside, and the exhaust port 30 that guides the exhaust gas that has passed through the heat exchange part 27 to the exhaust part. Is provided.

Reference numeral 31 is a convection fan provided on the back surface of the hot air heater main body 1, which sucks indoor air and blows it toward the outer cylinder 19 and the heat exchanger 26 to exchange heat with the exhaust gas to obtain hot air. It blows out from the outlet 2 to heat the room with warm air, and rotates clockwise when viewed from the front of the hot air heater main body 1.

32 is a combustion chamber, and is a back heat shield having an upper heat shield plate 33, a left heat shield plate 34, a right heat shield plate 35, and a vent 36 through which air blown from a convection fan 31 passes. It is formed by a plate 37 and a fixing plate 38, the burner portion 23 is attached to the fixing plate 38, the outer cylinder 24 is arranged in the combustion chamber 32, and the exhaust chamber 25 is attached to the upper heat shield plate 33. The exhaust chamber 25, the heat exchanger 26, and the exhaust collecting chamber 29 are arranged in the combustion chamber 32.

An upper surface ventilation port 39 is formed in the upper heat shield plate 28, and the open position is between the convection fan 31 and the heat exchange portion 27, and one end thereof is on the heat exchange portion 27 side of the outer cylinder 24. At almost the same position, the other end is formed at almost the same position as the side plate side of the heat exchange portion 27, and is formed in a substantially rectangular shape long in the width direction of the hot air heater main body 1, that is, the upper heat shield. It is opened on the wind side of the position of the heat exchanger 26 of the plate 28 to have substantially the same width as the heat exchanger 26.

Further, a wind direction plate 40 is formed on the lower surface side of the upper surface ventilation port 39, and the tip thereof is provided diagonally downward from the front surface of the main body to the back surface, and the tip portion thereof is bent substantially vertically. The bent portion 41 is formed.
The tip of the bent portion 41 is located at a height of about half the thickness of the exhaust chamber 25, guides a part of the air from the convection fan 31 to the upper ventilation port 39, and guides the remaining air to the exhaust chamber 25. This is to prevent the portion of the exhaust chamber 25 where the wind direction plate 40 is located from becoming hot.

Further, in the left heat shield plate 34, the side ventilation port 42 is formed in a vertically long substantially rectangular shape, and the open position is between the convection fan 31 and the heat exchange portion 27, and the upper end of the opening portion. Is slightly lower than the upper end of the convection fan 31, the lower end is also slightly lower than the lower end of the convection fan 31, and one end of the opening is located slightly closer to the back plate 14 than the front end of the convection fan 31 and the other end is convection. It is formed so as to be located between the front end of the fan 31 and the back side of the exhaust chamber 25, that is, the wind side of the left heat shield plate 34 which is a heat shield plate on the side surface close to the heat exchanger 26. It is opened at substantially the same height as the convection fan 31 and at substantially the same length as the diameter of the convection fan 31.

43 is a set of electrodes, includes a spark plug 44 for ignition and a frame rod 45 for detecting ignition, and is located at the lower part of the outer cylinder 24 in a direction away from the heat exchanger 26 than the position directly in front of the outer cylinder 24. It is provided at a slightly oblique position, and the mixture of kerosene vaporized in the outer cylinder 24 and the combustion air is ignited by the spark plug 44, and the ignition is detected by the frame rod 45.

Reference numeral 46 denotes a ventilation port for electrode assembly formed in the lower part of the back heat shield plate 37, which is formed at substantially the same height as the electrode assembly 43, and the height of the opening portion is formed substantially the same as the height dimension of the electrode assembly 43. The air blown from the convection fan 31 passes through the electrode assembly ventilation port 46 and hits the electrode assembly 43 of the outer cylinder 24.

Reference numeral 47 is a heat shield plate located between the outer cylinder 24 and the heat shield plate 16 of the fuel supply unit. In this embodiment, the blower guide plate is provided on the right heat shield plate 35, and is attached to the right heat shield plate 35. It includes a section 48 and a guide section 49 for guiding the air blown from the convection fan 31.

Further, the guide portion 49 stands up about 45 degrees with respect to the mounting portion 48, and the blower guide plate 47 is formed in an abbreviated shape, and the upper portion is inclined so as to approach the back plate 14 to the right. The upper end of the blower guide plate 47 is provided on the heat shield plate 35 so as to form a gap with the lower end of the exhaust chamber 25, and the lower end is provided so as to be substantially the same height as the upper end of the electrode assembly 43. The lower end of the guide plate 47 is provided so as to be located near the upper end of the electrode assembly 43.

Further, the ventilation guide plate 47 is inclined so that the upper part is substantially the same position as the back side of the outer cylinder 24 and the lower part is substantially the same position as the front side of the outer cylinder 24. The distance between the 24 and the guide portion 49 and the tip is provided so as to be approximately one-third of the distance between the outer cylinder 24 and the right heat shield plate 35.

Next, the operation of one embodiment of the present invention will be described.
First, when the heater (not shown) built in the burner section 23 is energized and the burner section 23 rises to a predetermined temperature, kerosene is sent from the fuel pump 18 which is a fuel supply means to the burner section 23 and vaporized. Further, combustion air is sent from the combustion blower 22 to the burner unit 23, vaporized kerosene and combustion air are mixed, and ignited by the ignition plug 44 of the electrode assembly 43 to start combustion.

The combustion gas passes through the outer cylinder 24 from the burner portion 23 as exhaust gas, rises, is guided by the heat shield plate in the exhaust chamber 25, passes around the exhaust chamber 25, and passes through each of the heat exchangers 26. It flows into the heat exchange section 27, passes through the inside, passes through the exhaust port 30 from the exhaust collecting chamber 29, flows to the exhaust section of the air supply / exhaust stack, and is exhausted to the outside.

Further, when combustion is started in the burner unit 23, a convection fan 31 provided on the back surface of the hot air heater main body 1 is driven to supply air in the room into the hot air heater main body 1 and supply the air. The air in the room is blown forward from the convection fan 31, passes through the outer periphery of each heat exchange section 27 of the outer cylinder 24 and the heat exchanger 26, exchanges heat, and is heated, and then the hot air heater main body. 1 It is blown out as warm air into the room from the front outlet 2.

Explaining the flow of air in the combustion chamber 32 here, among the air passing between the right side of the outer cylinder 24 and the right heat shield plate 24 when viewed from the front, the air passing beside the outer cylinder 24 is Since it flows along the outer peripheral portion of the outer cylinder 24, it does not flow straight toward the outlet 2, but flows so as to be pulled from the side of the outer cylinder 24 toward the center, and the air flowing toward the right heat shield plate 35 is It hits the guide portion 49 of the blower guide plate 47 and is guided in the direction of the outer cylinder 24 and flows toward the outer cylinder 24.

Further, since the upper part of the blower guide plate 47 is inclined so as to be substantially the same position as the back side of the outer cylinder 24 and the lower part is inclined so as to be substantially the same position as the front side of the outer cylinder 24, the guide portion of the blower guide plate 47 A part of the air that hits the 49 descends along the inclination of the guide portion 49 of the blower guide plate 47 and hits the electrode assembly 43, so that the electrode assembly 43 can be cooled.

Further, since the ventilation port 46 for electrode assembly was formed on the back heat shield plate 37 at substantially the same height as the electrode assembly 43, and the height of the opening portion was formed substantially the same as the height dimension of the electrode assembly 43, convection. When the air blown from the fan 31 passes through the electrode assembly ventilation port 46 and goes straight, it hits the electrode assembly 43 of the outer cylinder 24, and the electrode assembly 43 can be further cooled.

Further, the electrode assembly 43 is provided at a position slightly oblique to the direction away from the heat exchanger 26 from the position directly in front of the outer cylinder 24, that is, diagonally toward the right side of the outer cylinder 24 and the right heat shield plate 24. Therefore, the air that has passed through the electrode assembly ventilation port 46 formed on the back heat shield plate 37 sufficiently hits the electrode assembly 43 when traveling straight, and can further cool the electrode assembly 43.

The distance between the right side of the outer cylinder 24 and the right heat shield plate 35 is not wide, and the outlet 2 is up to the front of the right heat shield plate 35, and the outlet 2 is not provided on the right side of the right heat shield plate 35. Therefore, even if the air passing between the right side of the outer cylinder 24 and the right heat shield plate 35 flows toward the outer cylinder 24, the blowing of warm air is not so affected, and the outside from the front. Since the air passing through the left side of the cylinder 24 also flows along the outer peripheral portion of the outer cylinder 24, it does not flow straight toward the outlet 2 but flows so as to be pulled from the side of the outer cylinder 24 toward the center. As a result, the air flowing along the right side of the outer cylinder 24 and the air flowing along the left side of the outer cylinder 24 collide with each other and blow out straight from the outlet 2.

Further, the air passing between the left side of the outer cylinder 24 and the heat exchange portion 27 at the right end of the heat exchanger 26 when viewed from the front is the air passing beside the outer cylinder 24 on the outer peripheral portion of the outer cylinder 24. Since it flows along, it does not flow straight toward the outlet 2, but flows so as to be pulled from the side of the outer cylinder 24 toward the center, and the air flowing toward the heat exchange portion 27 at the right end of the heat exchanger 26 exchanges heat. Since the front side of the portion 27 is provided diagonally so as to be farther from the outer cylinder 24 than the rear side, when flowing along the heat exchange portion 27, the portion 27 flows in the direction away from the outer cylinder 24, but heat is generated. When it passes through the exchange portion 27, it is pulled toward the center of the outer cylinder 24, and as a result, it is straightened and blown out from the outlet 2.

Further, the air passing between the heat exchange portions 27 of the heat exchanger 26 is provided at an angle so that the front side of the heat exchange portion 27 is farther from the outer cylinder 24 than the rear side, so that the heat exchange portion is provided. When flowing along 27, it flows in a direction away from the outer cylinder 24, but when it passes through the heat exchange unit 27, it is pulled toward the center of the outer cylinder 24, and as a result, it becomes straight and the outlet 2 It blows out from.

Further, the air passing between the heat exchange portion 27 at the left end of the heat exchanger 26 and the left heat shield plate 34 when facing from the front exchanges heat with the air flowing toward the heat exchange portion 27 at the left end of the heat exchanger 26. Since the front side of the portion 27 is provided diagonally so as to be farther from the outer cylinder 24 than the rear side, when flowing along the heat exchange portion 27, the portion 27 flows in the direction away from the outer cylinder 24, but heat is generated. When it passes through the exchange portion 27, it is pulled toward the center of the outer cylinder 24, and as a result, it is straightened and blown out from the outlet 2.

Further, the air flowing toward the left heat shield plate 34 also flows in the direction away from the outer cylinder 24 due to the influence of the air flowing toward the heat exchange portion 27 at the left end of the heat exchanger 26, but is in front of the heat exchange portion 27. When it flows to the position, it is pulled toward the center of the outer cylinder 24, and as a result, it becomes straight and blows out from the outlet 2.

As described above, since the blower guide plate 47 is provided on the left heat shield plate 34 or the right heat shield plate 35 close to the vertically long outer cylinder 24 that guides the combustion gas of the burner portion 23 as exhaust gas, it is left from the convection fan 31. The air flowing toward the heat shield plate 34 or the right heat shield plate 35 hits the blower guide plate 47 and is guided toward the outer cylinder 24 and flows toward the outer cylinder 24, whereby the outer cylinder 24 is sufficiently cooled and the combustion gas is charged. It is possible to prevent the exhaust temperature from becoming high.

Further, an electrode assembly 43 provided with a spark plug 44 and a frame rod 45 for detecting ignition is provided in the lower part of the outer cylinder 24, and the blower guide plate 47 is provided so as to be inclined so that the upper side approaches the back plate 14. Since the lower end of the blower guide plate 47 is provided so as to be located near the electrode assembly 43, the air flowing from the convection fan 31 toward the left heat shield plate 34 or the right heat shield plate 35 hits the blower guide plate 47 and is outside. Guided in the direction of the cylinder 24, it flows toward the outer cylinder 24, whereby the outer cylinder 24 is sufficiently cooled to detect ignition with the spark plug 44 of the electrode assembly 43 whose tip is located in the outer cylinder 24. It is possible to prevent the frame rod 45 from becoming hot.

Further, a part of the air that hits the guide portion 49 of the blower guide plate 47 descends along the inclination of the guide portion 49 of the blower guide plate 47 and hits the electrode set 43 to cool the electrode set 43, thereby cooling the electrode set 43. It is possible to prevent the spark plug 44 of the electrode assembly 43 and the frame rod 45 for detecting ignition from becoming hot.

Further, the combustion chamber 32 is provided with a back heat shield plate 37 having a vent 36 formed at the upper part through which air blown from the convection fan 31 passes, and ventilation for electrode assembly is provided at the lower part of the back heat shield plate 37. Since the port 46 was formed, the ventilation port 46 for electrode assembly was formed at substantially the same height as the electrode assembly 43, and the height of the opening portion was formed at substantially the same height as the electrode assembly 43, convection. When the air blown from the fan 31 passes through the ventilation port 46 for electrode assembly and goes straight, it hits the electrode assembly 43 of the outer cylinder 24, whereby the electrode assembly 43 can be further cooled.

Further, the electrode assembly 43 is provided at a position slightly oblique to the direction away from the heat exchanger 26 from the position directly in front of the outer cylinder 24, that is, diagonally toward the right side of the outer cylinder 24 and the right heat shield plate 35. Therefore, the air that has passed through the electrode assembly ventilation port 46 formed on the back heat shield plate 37 hits the electrode assembly 43 when traveling straight, and can further cool the electrode assembly 43.

1 Hot air heater body 2 Outlet 9 Lower plate 10 Front panel 11 Right side plate 12 Left side plate 13 Top plate 14 Back plate 23 Burner part 24 Outer cylinder 25 Exhaust chamber 26 Heat exchanger 31 Convection fan 32 Combustion chamber 33 Upper heat shield Plate 34 Left heat shield plate 35 Right heat shield plate 47 Blower guide plate

Claims (3)

A lower plate, a front panel with an outlet that blows hot air in the center of the front, a right side plate, a left side plate, a top plate, a hot air heater main body consisting of a back plate, fuel and combustion air. A burner portion that burns by receiving the supply of heat, a vertically long outer cylinder whose lower end is connected to the upper part of the burner portion and guides the combustion gas of the burner portion as exhaust gas, and an outer cylinder that is juxtaposed with the outer cylinder and burns. The heat exchanger that circulates the combustion gas from the outer cylinder and exchanges heat with the air that flows around the outer cylinder, and the exhaust gas that has passed through the outer cylinder by connecting the upper end of the outer cylinder and the upper end of the heat exchanger . It has an exhaust chamber to be sent inside , an upper heat shield plate, a left heat shield plate, and a right heat shield plate provided in the hot air heater main body, and has an outer cylinder, an exhaust chamber, and a heat exchanger. In a hot air heater provided with a heat exchanger and a convection fan for blowing indoor air to the outer periphery of the outer cylinder, which is provided on the back plate, and is close to the outer cylinder. A hot air heater characterized in that a blower guide plate is provided on the left heat shield plate or the right heat shield plate. An electrode set including an ignition plug and a frame rod for detecting ignition is provided in the lower part of the outer cylinder, and the blower guide plate is provided so as to be inclined so that the upper side approaches the back plate, and the lower end of the blower guide plate is provided. 1 is the hot air heater according to claim 1, wherein is provided so as to be located in the vicinity of the electrode assembly. The combustion chamber is provided with a back heat shield having a vent at the upper part through which air blown from the convection fan passes, and a ventilation port for electrode assembly is formed at the lower part of the back heat shield. The hot air heater according to claim 2.

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