JP2004325060A - Hot air heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot air heater having improved constructiveness and beautiful appearance. <P>SOLUTION: In the hot air heater to be mounted on a wall face, a plurality of body hooking portions 41 are provided on a mounting plate 25 to be fixed to the wall face and a plurality of inversely L-shaped portions 42 to be hooked by any of the body hooking portions 41 are formed at the reverse upper part of the body 11. Thereby, a positional relationship between the mounting plate 25 and the body 11 can be set flexible. The hot air heater has effectively improved constructiveness and beautiful appearance. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a warm air heater that blows warm air into a room such as a bathroom to heat the room.

  Conventionally, this type of hot air heater supplies hot water from a heat source device and blows out hot air heated by the heat into a bathroom. 2. Description of the Related Art There has been known a configuration in which heat exchange with air is performed, and heated air is blown into a bathroom by a circulation fan or the like (for example, see Patent Document 1).

Patent Literature 1 includes a main body case in which a heating mechanism such as a heat exchanger is housed and a front cover, and a locking claw of a mounting plate fixed to a wall surface of a bathroom is formed on a back surface of the main body case. The main body case is fixed to the wall of the bathroom by inserting it into the insertion hole, and the connection tube connected to the heat exchanger is drawn out through the drawing hole formed on the back of the main body case and the through hole formed on the wall of the bathroom. A hot air heater with a configuration is described. A tube housing recess is formed in the main body case to guide the connection tube drawn out of the machine to a ventilation hole in a wall surface, and a cutout for opening the tube housing recess is formed on the bottom surface of the main body case.
JP 2002-340353 A

  In this type of conventional hot air heater, the position of the mounting plate attached to the wall and the main unit are uniquely determined, so after mounting the mounting plate, the main unit is moved in the width direction even if the mounting position is bad. In such a case, fine adjustment cannot be performed when the gap in the depth direction with respect to the wall surface is unbalanced in the left, right, up, and down directions of the main body.

  The present invention is to solve such a conventional problem, and provides a warm air heater that improves workability and improves aesthetic appearance by making the positional relationship between a mounting plate and a main body flexible. It is.

  In order to achieve the above object, a warm air heater of the present invention is a hot air heater mounted on a wall, wherein a plurality of main body hooks are provided on a mounting plate fixed to the wall, and a main body having a circulation fan and a heat exchanger. A plurality of inverted L-shaped portions for hooking on any of the main body hooking portions are formed on the upper portion of the back surface of the device.

  Further, in order to achieve the above object, the hot air heater of the present invention forms an inverted L-shaped projection extending toward the main body at the lower part of the mounting plate, and forms a screw hole or a hook part at the lower part of the main body. It is screwed or hooked on the inverted L-shaped projection.

  In order to achieve the above object, the warm air heater of the present invention has a width in the lateral direction of the hook portion of the main body larger than the width of the inverted L-shaped portion of the main body, and a screw having a long hole in the width direction at the lower portion of the main body. A hole was formed.

  Further, in order to achieve the above object, the hot air heater of the present invention has the screw holes elongated in the depth direction.

  Further, in order to achieve the above object, the hot air heater of the present invention has a means for adjusting a gap between the main body hooking portion or the inverted L-shaped portion of the main body and the wall surface.

  In addition, in order to achieve the above object, the warm air heater of the present invention has a lower plate fitted into a lower portion of the main body to shield a screw.

  Further, in order to achieve the above object, the hot air heater of the present invention has a round hole formed in a mounting plate communicating with a ventilation hole, and a distal end portion of a duct adapter is pressed by a peripheral portion of the round hole.

  By these means, the positional relationship between the mounting plate and the main body can be made flexible, and the workability and aesthetics of the product can be improved.

  According to the present invention, it is possible to provide a warm air heater having an effect of improving workability and aesthetic appearance by making the positional relationship between the mounting plate and the main body flexible.

  The invention according to claim 1 of the present invention provides a plurality of main body hooks on a mounting plate fixed to a wall surface, and hooks any one of the main body hooks on the upper rear surface of the main body having a circulation fan and a heat exchanger. Since a plurality of inverted L-shaped portions are formed, the position where the main body is mounted on the mounting plate can be freely adjusted in the width direction.

  According to a second aspect of the present invention, in the warm air heater according to the first aspect, an inverted L-shaped protrusion extending toward the main body is formed at a lower portion of the mounting plate, and a screw hole or a lower hole is formed at a lower portion of the main body. Since the hook portion is formed and screwed or hooked on the inverted L-shaped protrusion, the lower portion of the main body can be prevented from projecting forward while improving workability.

  According to a third aspect of the present invention, in the warm air heater according to the first aspect, the width of the main body hooking portion in the lateral direction is larger than the width of the inverted L-shaped portion of the main body, and Since the elongated screw hole is formed in the width direction, even after the mounting plate is fixed to the wall surface, the main body can be moved right and left to adjust the position to the optimum position in the bathroom.

  According to a fourth aspect of the present invention, in the warm air heater according to the first aspect, the screw holes are elongated in the depth direction, so that the lower gap between the wall surface and the main body is adjusted, and the installation state is adjusted. This has the effect of improving the aesthetic appearance of the camera.

  Further, the invention according to claim 5 of the present invention has the means for adjusting the gap between the main body hooking portion or the inverted L-shaped portion of the main body and the wall surface in the warm air heater according to claim 1, This has the effect that the upper gap between the wall surface and the main body can be adjusted.

  According to a sixth aspect of the present invention, in the hot air heater according to any one of the second to fourth aspects, a lower plate is fitted into a lower portion of the main body and a screw is shielded. This has the effect of hiding the exposed screws while smoothing the flow.

  According to a seventh aspect of the present invention, in the hot air heater according to the first aspect, a round hole communicating with the ventilation hole is formed in the mounting plate, and a distal end of the duct adapter is connected to the round hole peripheral portion. As a result, the ventilation air path formed by the gap between the main body and the wall surface is not blocked by the duct adapter, and moisture does not leak from the bathroom into the wall surface.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, taking as an example a case where the present invention is installed in a bathroom.

  FIG. 1 is a perspective view showing an overall configuration of a hot air heater according to the present invention, and FIG. 2 is a cutaway sectional view showing a state where the hot air heater of FIG. 1 is attached to a bathroom. 1 and 2, a hot air heater 10 includes a main body 11 as an indoor unit installed in a bathroom, a ventilation unit 12 as an outdoor unit installed outside a bathroom, and a main unit 11 and a ventilation unit 12 formed on a wall. It consists of a duct 13 connected inside. In addition, the ventilation unit 12 and the duct 13 may be omitted, and the main body 11 may be used alone as a heater.

  The upper part of the main body 11 is provided with a main inlet 14 opening upward, and the lower part thereof is provided with an outlet 15 opening downward. If an automatic louver and an automatic wing operated by a stepping motor are provided at the outlet 15, it is easy to adjust the blowing direction up and down and right and left.

  An auxiliary suction port 18 is formed between the flat panel 16 and the position just above the air outlet 15 of the main body 11. Since the sub-suction port 18 can average the wind speed passing through the heat exchanger portion, the heat exchange efficiency of the heat exchanger can be improved and the air volume can be reduced, so that the operation noise can be reduced. . Further, the balance between the air intake volume from the main intake port 14 and the air intake volume from the sub intake port 18 is appropriately set to the intake air volume 1 to 4 from the sub intake port 18 to the intake air volume 9 to 6 from the main intake port 14. It is. Although the suction port 18 is located immediately above the outlet, the effect is not changed even if the suction port 18 is disposed near the center of the flat panel 16 on the side surface or the front surface.

  As shown in FIG. 2, the coil 21 is arranged so that the plane direction is substantially vertical, the coil 22 is arranged so that the plane direction is substantially horizontal with respect to the ceiling surface, and the coil 23 is blown in the plane direction. It is arranged in a direction substantially perpendicular to the direction of blowing hot air from the outlet 15, and is fixed by a coil fixing tool 31 (see FIG. 5 described later) so as to surround the circulation fan 19. Therefore, the coils 21, 22, and 23 can be made compact while maximizing the area of the heat transfer portion (aluminum fin), thereby increasing the performance and reducing noise. The front surface of the coil 21 is covered with the flat panel 16 of the main body 11. The flat panel 16 can be formed as the flat panel 16 because the plane direction of the coil 21 is substantially perpendicular. By making the front surface of the main body 11 a flat panel structure, the design is excellent, and since there is no accumulation of dust on the front surface of the panel, the cleaning performance is improved.

  Although it is best that the flat panel 16 has no suction port at all, there is no difference in the effect even if there is some suction from the front (about 10 to 40% of the total suction air volume). The flat panel 16 can be formed even when the surface direction of the coil 21 is not set substantially in the vertical direction. In this case, the depth dimension is increased, which affects compactness, but does not affect the effect of preventing short circuit and the like, and a similar effect can be obtained.

  The finer the coils 21, 22, and 23 are arranged around the circulation fan 19, the lower the surface wind speed and the lower the noise. Further, the coils 21, 22, and 23 may not be completely divided or may be connected by fins having a small area.

  A filter fixing frame 17 on which a filter is mounted is inserted into the inside of the front surface and the upper surface of the flat panel 16, and the filter fixing frame 17 is taken in and out of the sub suction port 18 by turning the opening of the sub suction port 18 downward. Can be. FIGS. 3 and 4 show a state where the filter fixing frame 17 is pulled out from the sub suction port 18. FIG. A fixing tool 172 having an L-shaped cross section is provided below the filter fixing frame 17, and the convex portion 173 provided on the back side of the fixing tool 172 is formed by a hole or a concave portion (not shown) of the flat panel 16. Engage and fix according to this principle. Therefore, attachment and detachment of the filter can be facilitated.

  The filter fixing frame 17 has a handle 171 for drawing out at the lower end. When removing the filter fixing frame 17, if the handle 171 is slightly raised upward, the convex portion 173 is disengaged from the concave portion of the flat panel 16, so that the filter fixing frame 17 can be pulled out from the sub suction port 18 by pulling downward. . When attaching the filter fixing frame 17, the upper end of the filter fixing frame 17 is inserted into the sub-suction port 18, and the handle 171 is raised upward, so that the dowel is fitted and fixed in the hole of the flat panel 16. As described above, since the filter member can be easily taken in and out, maintenance such as cleaning of the filter and replacement of the filter becomes easy. In addition, since the handle is convex forward, the strength of the filter fixing frame 17 is increased, and the short circuit and turbulence of the air flow hardly occur, so that the driving noise can be reduced.

  When the filter fixing frame 17 is in contact with the coil 21, the filter may not be smoothly taken in and out, or the filter may be damaged. Therefore, the filter device 20 is provided at a position where the filter fixing frame 17 and the coil 21 face each other. This can prevent the filter fixing frame 17 from coming into contact with the coil 21 when the filter fixing frame 17 is taken in and out.

  FIG. 5 is a front view showing the internal structure of the main body 11. The main body 11 has coils 21, 22, and 23 disposed substantially at the center thereof, and has a main suction port 14 at the upper center, and an air outlet 15 and a sub suction port 18 at the lower center. A circulation fan 19 that is rotated by a circulation motor 26 is disposed behind the coils 21, 22, and 23.

  A circulation motor 26, an inlet pipe 28 and an outlet pipe 29 for flowing hot water or refrigerant for heat exchange, and a pipe connection part 27 connected to the inlet pipe 28 and the outlet pipe 29 are arranged on one side of the left and right sides of the main body. Have been. By arranging the inlet pipe 28 and the outlet pipe 29 vertically separated so as to sandwich the circulation motor 26, it is possible to improve the workability while reducing the size. A pipe 30 is connected to the pipe connection portion 27 over the entire width of the main body 11 so that hot water circulates around the circulation fan 19. The inlet pipe 28 and the outlet pipe 29 are connected to a resin pipe or a copper pipe (not shown) connected to an incoming pipe and a return pipe of a boiler for making and circulating hot water. On the other side of the left and right sides of the main body, an electrical unit 36, which is a driving electric system of the main body 11, is arranged, and is electrically connected to the boiler. The lead wires 32 of the outlet 15 such as the stepper motor for the auto louver and the circulation motor 26 are fixed to the lead wire fixture 33 between the lower portions of the coils 21 and 23 and the outlet 15 and are connected to the electrical component 36 to reduce the size. be able to. The lead wire fixing member 33 is used to increase reliability by preventing the lead wire from protruding into the air outlet 15 and to make it easier to remove the lead wire from the main body 11 during maintenance of the main body 11.

  With such a configuration, the main suction port 14, the blowout port 15 and the sub-suction port 18, the heat exchanger, and the circulation fan 19 for generating hot air are arranged substantially at the center in the left-right direction of the main body, and hot water or coolant supply The main body 11 as an indoor unit can be made symmetrical, so that the design can be improved, and even when the main body 11 is installed at one corner of a bathroom. It is possible to prevent performance deterioration and temperature distribution deterioration due to approach to the side wall.

  Next, the heating and drying operation will be described. The receiver provided on the front of the main body 11 receives an infrared signal transmitted from the wireless remote controller by a user's operation, and the operation signal causes a hot water circulation command to flow to the boiler, thereby producing a boiler operated. The hot water flows through the pipe, the heat valve in the opened main body 11, and the heat exchanger formed by the coils 21, 22, and 23.

  During the heating operation, the air in the bathroom is sucked into the main suction unit 14 from above by the circulation fan 19 and exchanged heat by the heat exchanger arranged in the main body 11, and hot air is blown downward from the outlet 15. To circulate through the bathroom and heat the entire bathroom. In this way, by sucking air from above the main body 11 and blowing it out from below, the warm air blown out reaches the bathroom floor without being short-circuited, and circulates along the bathroom wall surface and ceiling surface to the suction port. Therefore, the temperature distribution during heating becomes uniform throughout the bathroom. In addition, since there is no suction port on the front surface, driving noise in front can be reduced.

  During the drying operation, the main body 11 blows out warm air from the air outlet 15 by the same operation as during the heating operation, but at the same time, the ventilation motor and the fan in the ventilation unit 12 installed outdoors rotate, and the main body 11 and the wall surface are rotated. The moisture in the bathroom is sucked through the gap, and the moisture is exhausted from the exhaust port of the ventilation unit 12 through the duct 13. The hot air hits the clothes and the floor and walls of the bathroom, and the clothes and the bathroom can be dried by discharging moisture. Even during the drying operation, the warm air efficiently hits the clothes and the floor and walls of the bathroom, and discharges the humidity outdoors, so that the drying time of the clothes and the bathroom can be reduced and uneven drying can be prevented.

  Next, a configuration in which the main body 11 is installed on a wall surface of a bathroom will be described. Returning to FIG. 2, the main body 11 is installed on the wall surface of the bathroom. In this case, the mounting plate 25 is attached to the wall surface of the bathroom, and the inverted L-shaped portion 42 of the main body 11 is hooked and fixed to the main body hooking portion 41 formed on the upper portion of the mounting plate 25. This is shown in FIG. A plurality of main body hooks 41 of the mounting plate 25 are provided on the upper portion of the mounting plate 25, and a plurality of inverted L-shaped portions 42 for hooking on any of these main body hooks 41 are provided on the upper rear surface of the main body 11. Is formed. Since a plurality of main body hooks 41 and a plurality of inverted L-shaped portions 42 are provided, any one of the main body hooks 41 and the inverted L-shaped portions 42 can be hooked so that the left-right positional relationship with respect to the width direction of the main body 11, that is, the mounting plate 25. Can be adjusted freely.

  On the other hand, an inverted L-shaped projection 43 extending toward the main body 11 is formed at a lower portion of the mounting plate 25, and a screw hole or a hook portion is formed at a lower portion of the main body 11 to be screwed or hooked onto the inverted L-shaped projection 43. Fix with. Thereby, it is possible to prevent the lower part of the main body 11 from being pushed forward by a pipe or the like and rising forward while improving the workability.

  The width of the main body hooking portion 41 of the mounting plate 25 in the lateral direction is made larger than the width of the inverted L-shaped portion 42 of the main body 11, and the screw hole at the lower portion of the main body 11 is formed as a long hole in the width direction. Even after the 25 is fixed to the wall surface, the fixing position of the main body 11 can be moved to the left and right, and the mounting position can be adjusted to be the optimum position in the bathroom.

  In addition, by making the screw holes in the lower portion of the main body 11 elongated in the depth direction, the gap between the wall surface and the main body 11 can be adjusted to improve the appearance in the installed state. As means for adjusting the gap between the wall surface and the main body 11, an elastic member such as rubber is sandwiched between the main body hooking portion 41 of the mounting plate 25 or the inverted L-shaped portion 42 of the main body 11 and the wall surface, or screws are tightened. It is also possible to make adjustments by adjusting the position and the hooking position. In this case, not only the lower gap between the wall surface and the main body 11 but also the upper gap can be adjusted.

  When a screw hole is formed in the lower part of the main body 11 and the main body 11 is fixed to the mounting plate 25, the screw at the lower part of the main body 11 may be exposed. Further, the fixing screws of the flat panel 16 may be exposed to the outside. In this case, these screws can be hidden by fitting the lower plate 45 into the main body 11 as shown in FIG. 2, and the flow of warm air in the lower part of the outlet 15 can be made smooth by the lower plate 45. .

  As described above, the main body 11 is mounted on the wall surface by the mounting plate 25 as shown in FIG. By the way, as shown by the arrows in FIGS. 2 and 6, the ventilation air sucked from the gap between the main body 11 and the wall surface and the ventilation air sucked from the main suction port 14 and the sub suction port 18 are ventilated in the bathroom. This is performed by passing through the duct adapter 24 and the duct 13 through the inside ventilation air passage and exhausting from the outdoor ventilation unit 12. According to such a ventilation method, even if the gap between the main body 11 and the wall surface is reduced, the ventilation air can be sucked from the main suction port 14 and the sub suction port 18, so that a necessary ventilation air volume can be secured. In addition, the gap between the main body 11 and the wall surface can also be used as a ventilation air passage. Therefore, the connection between the main body 11, the duct adapter 24 and the duct 13 is performed as shown in FIG.

  As described in FIG. 6, the main body 11 is attached to the wall surface by using the attachment plate 25. At this time, when the duct adapter 24 is installed on the bathroom side of the wall surface and the duct 13 is pushed into the ventilation hole in the wall from the outer wall side, the duct adapter 24 may be pushed and extend to the main body 11 side. When the duct adapter 24 extends toward the main body 11, the ventilation air passage in the gap between the main body 11 and the wall is blocked, or a gap is formed between the ventilation hole in the wall and the duct adapter 24, and moisture leaks there. May occur and damage the wall. Therefore, a round hole 51 communicating with the ventilation hole on the wall surface is formed in the mounting plate 25, and a protruding portion is formed around the round hole 51 toward the main body 11 to form a concave portion 46 on the wall surface side. Hold it within 46. Thus, even if the duct 13 is pushed in from the outer wall side, the tip of the duct adapter 24 is pressed around the round hole 51 of the mounting plate 25 and does not extend to the main body 11 side. Therefore, the ventilation air passage due to the gap between the main body 11 and the wall surface is not blocked by the duct adapter 24, and moisture does not leak from the bathroom into the wall surface. A plurality of holes 48 are formed in the mounting plate 25, and the mounting plate 25 is fixed to a wall surface by using the holes 48. At this time, by selecting the position of the hole 48 to be fixed, the positional relationship between the round hole 51 and the duct hole of the duct adapter 24 can be adjusted.

  By the way, the ventilation hole on the wall is often provided in the bathroom in an existing state. There is no standard for the existing ventilation holes, and round holes or square holes of various sizes are usually formed arbitrarily. If the ventilation hole is a square hole or a round hole larger than the diameter of the duct adapter 24, the main body 11, the duct adapter 24 and the duct 13 are connected as shown in FIG. That is, the mounting plate 25 having the round hole 51 corresponding to the diameter of the duct adapter 24 and the duct 13 is installed on the wall surface where the square hole 50 is formed, and the duct adapter 24 is inserted into the round hole 51 of the mounting plate 25. And fix it with screws. Next, the duct 13 is connected to the duct adapter 24, and a ventilation unit mounting plate 60 having a hole corresponding to the diameter of the duct 13 is installed in a square hole of the outer wall. 13 and is connected to the ventilation unit 12. Thereby, since the square hole 50 is closed to the bathroom except for the round hole 51 of the mounting plate 25, moisture in the bathroom is prevented from leaking into the wall. Further, rainwater and insects can be prevented from entering the bathroom from the outside. On the other hand, on the outer wall side, the square hole 50 is closed except for the hole through which the duct 13 formed in the mounting plate for the ventilation unit 12 is inserted, so that intrusion of rainwater and insects from the outside can be prevented.

  FIG. 9 is a perspective view in which the main body of the main body 11 is installed in a bathroom. Usually, the main body is installed at a position of about 1.9 m from the floor surface on the bathtub side, and blows out so that the hot air blows out near the center of the washing room. When heating is performed by adjusting the angle of the mouth with an auto louver or the like, the warm air reaches the floor surface, and the temperature near the floor can be effectively raised. Also, once warm air reaches the washing place, it moves upward while warming the floor and low position air and gradually lowering the temperature, forming a cycle where heat is exchanged from the upper suction port of the main body without short circuit, It achieves the ideal temperature distribution of head and foot heat and lowers the suction temperature compared to those that have a short circuit, so it can take a large temperature difference with the heat exchanger, which is advantageous for heat exchange capacity And can greatly improve the heating performance.

  In addition, the main body installation position was on the bathtub, but if it is installed on the entrance of the washing area, for example, at the entrance door, or on the upper part of the wall adjacent to the wall where the door is provided, the distance between the main body outlet and the floor of the washing area will be short. Since the wind speed reaching the floor surface is also increased, the temperature near the floor can be further increased.

  In the above description, a bathroom heater or a bathroom ventilation dryer is described as an example, but the technology of the present invention can be used as an indoor heater or a dryer other than a bathroom.

  Further, in the embodiment, an example has been described in which hot water heated by a boiler such as gas or petroleum is supplied as a heat source of a heat exchanger for performing heat exchange with air. If it is connected to a heat source unit of the type, it can be used only with the electric infrastructure, and if heat exchange is performed by a PTC heater, sheathed heater, radiant heater, etc. The life scene that can be used is expanded by using.

  The hot air heater of the present invention responds to the demand for products that require design and miniaturization in the appearance of the main body, such as sanitary zones such as bathrooms, washrooms, toilets, offices, living rooms, and the like. The present invention can also be applied to indoor heaters and dryers.

The perspective view which shows the whole structure of the warm air heater by this invention 1 is a cross-sectional view showing a state where the hot air heater of FIG. 1 is attached to a bathroom. The perspective view which shows the state which pulled out the filter fixing frame in the warm air heater by this invention. The perspective view of the principal part in the state where the filter fixing frame was pulled out in the warm air heater according to the present invention. The front view which shows the internal structure of the main body of the warm air heater in this invention. The perspective view of the principal part at the time of attaching the main body of the warm air heater in the present invention to the wall surface FIG. 3 is a perspective view illustrating a method of connecting the main body of the hot air heater to the duct adapter and the duct according to the present invention. The perspective view explaining the construction method at the time of attaching a warm air heater in the present invention to a square hole ventilation hole. The perspective view which shows the state in which the hot air heater in this invention was installed in the bathroom.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 10 Hot air heater 11 Main body 12 Ventilation unit 13 Duct 14 Main suction port 15 Outlet 16 Flat panel 17 Filter fixing frame 18 Sub suction port 19 Circulation fan 20 Filter tool 22 Coil 23 Coil 24 Duct adapter 25 Mounting plate 26 Circulation motor 27 Piping connection part 28 Inlet pipe 29 Outlet pipe 30 Piping 31 Coil fixture 32 Lead wire 33 Lead wire fixture 36 Electrical part 41 Main body hook part 42 Inverted L-shaped part 43 Inverted L-shaped projection 45 Lower plate 46 Depressed part 47 Tip part 48 Hole 50 Square hole 51 Round hole 60 Mounting plate for ventilation unit 171 Handle 172 Fixture 173 Convex part

Claims (7)

In a hot-air heater mounted on a wall, a plurality of main body hooks are provided on a mounting plate fixed to the wall, and a reverse portion for hooking on one of the main body hooks on the upper rear surface of the main body having a circulation fan and a heat exchanger. A hot air heater having a plurality of L-shaped portions. 2. The inverted L-shaped projection extending toward the main body at a lower portion of the mounting plate, and a screw hole or a hook portion is formed at a lower portion of the main body to be screwed or hooked on the inverted L-shaped projection. A hot air heater according to claim 1. 2. The hot air heating system according to claim 1, wherein the width of the main body hooking portion in the lateral direction is larger than the width of the inverted L-shaped portion of the main body, and a long screw hole is formed in the lower portion of the main body in the width direction. Machine. The hot air heater according to claim 1, wherein the screw holes are elongated in the depth direction. The hot air heater according to claim 1, further comprising a means for adjusting a gap between the main body hooking portion or the inverted L-shaped portion of the main body and the wall surface. The hot air heater according to any one of claims 2 to 4, wherein a lower plate is fitted into a lower portion of the main body to shield a screw. The hot air heater according to claim 1, wherein a round hole communicating with the ventilation hole is formed in the mounting plate, and a distal end portion of the duct adapter is held down by a peripheral portion of the round hole.

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