JP5434139B2 - Hot air heater - Google Patents

Description

  The present invention relates to a hot air heater, and more particularly, to a hot air heater of the type used by being placed on a floor.

  FIG. 6 shows an example of a schematic configuration of this type of hot air heater. As shown in the figure, this type of hot air heater a includes a hot air outlet b at the front of the appliance, an intake portion c at the back of the appliance, and a combustion portion d, a convection fan e, and a guide plate f inside the appliance. As prepared. During heating, the convection fan e is driven, and an air flow as shown by arrows in the figure is formed in the appliance by the guide plate f. In this state, the air introduced from the intake section c is used as the combustion section. The air heated by d is configured to forcibly blow out the heated air as hot air from the hot air outlet b to the outside of the appliance.

  By the way, in the warm air heater a having such a configuration, in order to efficiently warm the room with the warm air blown outside the appliance, the hot air outlet b is located as low as possible in the front of the appliance (position close to the floor). It is preferable to arrange. However, on the other hand, it is widely known that when the warm air outlet b is disposed at the lower part of the front of the appliance, the floor material is heated by the blown warm air and the floor material may be discolored or deformed.

  Therefore, in the conventional hot air heater a, the direction of the louver g provided in the hot air outlet b is slightly upward from the horizontal (specifically, while the hot air outlet b is disposed at the lower part of the front of the appliance. Is set with an elevation angle of about 2 to 3 ° so that warm air does not hit the flooring.

  Further, as another method, for example, an air outlet different from the hot air outlet is provided below the hot air outlet, and a part of the air introduced from the air intake portion on the back of the instrument is forced from the air outlet. So that the air blown from the air outlet (air equivalent to room temperature) flows under the hot air blown from the hot air outlet, so that the hot hot air does not directly hit the flooring. Such a configuration has also been proposed (see, for example, FIGS. 1 and 3 of Patent Document 1).

JP-A-9-96447

  However, such conventional hot air heaters have the following problems, and improvements are desired.

  That is, in the configuration in which the elevation angle is set in the louver g, the warm air blown out from the warm air outlet b is directed upward (toward the ceiling) as it moves away from the appliance. There is a problem that the temperature does not rise and a sufficient heating effect cannot be obtained. Moreover, if hot air is blown upward in this way, for example, when the user is sitting on a sofa or the like located at a distance of about a few meters from the hot air heater, the hot air heating is performed. The warm air blown from the machine may hit the user's face, which may make the user feel uncomfortable.

  On the other hand, as in the latter case, in the configuration in which an air outlet is provided below the hot air outlet and the room temperature air is forcibly blown out from the hot air outlet, the room temperature air flows under the hot air blown from the hot air outlet. For example, if the room temperature is low as at the beginning of heating, a fairly cold air will be blown out, preventing the temperature from rising near the floor and preventing your feet from warming immediately. was there.

  The present invention has been made in view of such problems, and an object of the present invention is to provide hot air that can quickly obtain a heating effect from the feet while avoiding an excessive increase in floor temperature. It is to provide a heater.

In order to achieve the above object, a warm air heater according to claim 1 of the present invention heats air introduced from a first suction portion and passes the heated air through a predetermined warm air passage in the appliance. In the hot air heater having a structure forcibly blowing out from the hot air outlet, the lower part of the hot air passing through the hot air passage near the hot air outlet of the hot air passage is unheated air introduced from the second suction portion An air mixing mechanism for joining the region is provided.

That is, in this warm air heater, the warm air in the lower region of the warm air blown out from the warm air outlet is unheated air (second suction section) supplied from the air mixing mechanism in the vicinity of the warm air outlet. Therefore, the temperature is lower than the warm air in the other region (the upper region among the warm air blown out). Therefore, even if the hot air blowing direction (louver angle) is set below horizontal (with a depression angle), the warm air in the lower area (that is, hot air that is cooler than other areas) ) Will be blown, so that the temperature of the floor surface is prevented from excessively rising by the blown hot air.

  In addition, the temperature of the lower area of the hot air blown out from the hot air outlet at that time is lower than the temperature of the other areas (in the hot air, the upper area), but the hot air is taken in from the room. Because it is warm air mixed with air, it becomes a temperature higher than room temperature. Therefore, even if the warm air in the lower region at the beginning of heating is blown to the user's feet, the user is prevented from feeling uncomfortable without giving the user a feeling of cold air.

  Moreover, the warm air heater according to claim 2 of the present invention is the warm air heater according to claim 1, wherein one end of the air mixing mechanism is connected to the second suction portion and the other end is the warm air. It is characterized by comprising a passage for introducing air that is opened at the bottom of the passage.

  That is, in this warm air heater, the other end of the air introduction passage having one end communicating with the second suction portion is opened at the bottom of the warm air passage through which the warm air forcedly blown out from the warm air outlet flows. Therefore, the air introduced from the second suction portion is naturally guided into the warm air passage so as to be drawn by the warm air flowing through the warm air passage, and merges with the lower region of the warm air. . Therefore, in this warm air heater, the air mixing mechanism that supplies the air to be merged into the lower region of the warm air can be implemented without using a power component such as a blower fan. In other words, the present invention can be implemented without using extra power, with a simple configuration that merely provides a passage for introducing air from the second suction portion, with low manufacturing costs and no running costs. Can be implemented.

  Moreover, the warm air heater according to claim 3 of the present invention is the warm air heater according to claim 2, wherein the opening on the warm air passage side of the air mixing mechanism extends over the entire length in the width direction of the warm air outlet. Or it is formed in a part of the width direction.

  That is, in this warm air heater, the opening on the warm air passage side of the air mixing mechanism forms a mechanism for merging air for lowering the lower area of the warm air than the other areas. The opening is preferably formed over the entire length in the width direction of the hot air outlet according to the width direction size of the hot air to be blown out. In addition, the opening may be, for example, a predetermined one in the width direction of the hot air outlet as long as the temperature of the lower area of the hot air can be lowered so that the temperature of the floor surface is not excessively increased by the hot air blown out. Only one location can be provided, or a plurality of locations can be provided at predetermined intervals in the width direction of the hot air outlet. In short, the width of the opening and the number of the openings may be appropriately changed in design according to the state of the hot air blown out from the hot air outlet (the temperature of the hot air blown out, the width of the blowout, etc.). it can.

  Moreover, the warm air heater according to claim 4 of the present invention is the warm air heater according to claim 2 or 3, wherein the opening on the warm air passage side of the air mixing mechanism is provided at the peripheral portion on the warm air outlet side. The height position is set lower than the height position of the peripheral edge on the upstream side in the hot air blowing direction.

  That is, in the hot air heater according to claim 2 or 3, the air introduced from the second suction portion is automatically guided into the hot air passage so as to be drawn by the hot air flowing through the hot air passage. Therefore, the height position of the peripheral edge on the hot air outlet side of the opening for introducing air into the hot air passage and the height position of the peripheral edge on the upstream side in the hot air blowing direction are the same height, If the former is higher than the latter, the warm air flowing through the warm air passage may flow into the passage on the air mixing mechanism side and hinder the introduction of air into the warm air passage. For this reason, in this warm air heater, the air is introduced into the warm air passage by setting the height position of the peripheral edge on the warm air outlet side lower than the height position of the peripheral edge on the upstream side in the hot air blowing direction. The warm air is prevented from flowing into the passage on the air mixing mechanism side.

  Moreover, the warm air heater which concerns on Claim 5 of this invention is a warm air heater in any one of Claim 1 to 4. WHEREIN: The said 2nd suction part is arrange | positioned under the warm air blower outlet in front of an instrument. It is characterized by being. Preferably, a plurality of louvers are provided in a height direction of the hot air outlet, and a lowermost louver thereof divides the hot air outlet and the second suction portion, and the air introduction passage. It arrange | positions so that a part of may be formed.

  That is, in this warm air heater, since the 2nd suction part used as the inlet of the air introduce | transduced into a warm air path is arrange | positioned under the warm air blower outlet in the front of an instrument, a warm air path is passed from a 2nd suction part. The distance to the opening on the bottom surface can be set short, and air can be efficiently introduced into the warm air passage. In addition, by using the lowermost louver of the hot air outlet as a partition plate that separates the hot air outlet and the second suction portion and the ceiling plate of the passage for introducing air, the structure of the housing of the instrument can be obtained. It can be simplified and the present invention can be implemented at low cost. Moreover, since the adjustment of the blowing direction of the low temperature hot air can be performed by setting the louver mounting angle, the blowing direction can be arbitrarily set.

  Moreover, the warm air heater which concerns on Claim 7 of this invention is a warm air heater in any one of Claim 1 to 4. WHEREIN: The said 2nd suction part is arrange | positioned at the instrument back surface or the instrument side surface. It is characterized by that.

  In other words, in this case, the distance from the second suction portion to the opening of the bottom surface of the warm air passage becomes long, but air can be taken in from the second suction portion without being affected by the warm air blown from the warm air outlet. Therefore, as much as that, the outside air can be sucked in more efficiently than the hot air heater according to claim 5.

  According to the hot air heater of the present invention, the temperature of the lower region of the hot air blown out from the hot air outlet is suppressed to be lower than the temperature of other regions (the upper region in the hot air blown out). Therefore, even if the hot air is blown out in the direction of hitting the floor (for example, the direction downward from the horizontal), the temperature of the floor surface is prevented from excessively rising due to the blown out hot air.

  Therefore, warm air can be blown out along the floor, and indoor air can be efficiently stirred (a heating effect can be obtained in a short time), thereby saving energy (an effect of suppressing fuel consumption). You can also get Further, by blowing out the warm air along the floor, it is also possible to deliver the warm air to the feet of the user at a remote location. In addition, the temperature of the lower area of the hot air blown out from the hot air outlet is lower than the temperature of the other areas (in the hot air, the upper area), but is higher than the room temperature. The feeling of cold wind is not given to the user, and the user is prevented from feeling uncomfortable.

  Further, the present invention uses a passage for introducing air having one end communicating with the second suction portion and the other end opened on the bottom surface of the warm air passage as the air mixing mechanism. Air can be introduced into the hot air passage from the second suction portion side with a simple configuration without using any power components, and the present invention can be implemented without causing an increase in manufacturing cost and running cost.

  Further, according to the present invention, the opening on the warm air passage side of the air mixing mechanism can be formed over the entire length in the width direction of the warm air outlet or a part of the width direction. It can design suitably so that the temperature of the lower area | region of a warm air may not exceed desired temperature.

  Furthermore, the present invention sets the height position of the peripheral edge on the warm air outlet side in the opening on the warm air passage side of the air mixing mechanism to be lower than the height position of the peripheral edge on the upstream side in the hot air blowing direction. The warm air is prevented from flowing into the passage on the air mixing mechanism side, air can be smoothly introduced into the warm air passage, and the effects of the present invention can be obtained with certainty.

  In the present invention, the second suction portion is disposed below the hot air outlet on the front of the instrument, and the lowest louver among the louvers provided in the height direction of the hot air outlet is By combining the partition plate that separates the hot air outlet and the second suction portion and the ceiling plate of the air introduction passage, the present invention can be implemented at low cost.

It is a schematic structure figure showing an example of a warm air heater concerning the present invention. It is explanatory drawing for demonstrating the function of the air mixing mechanism in the same warm air heater. It is a partial expansion perspective view of the section of the case which shows the structure of the warm air blower outlet and the air mixing mechanism in the warm air heater. It is explanatory drawing which shows the modification of the air mixing mechanism of the same warm air heater, FIG.4 (a) is a case where the whole channel | path of an air mixing mechanism is comprised with a housing | casing, FIG.4 (b) is an air mixing mechanism. The case where a collar part is provided in the warm air passage side opening is shown. It is a schematic block diagram which shows another example of the warm air heater which concerns on this invention. It is a schematic block diagram which shows an example of the conventional warm air heater.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
Embodiment 1
FIG. 1 is a schematic configuration diagram illustrating an example of a hot air heater according to the present invention. Specifically, FIG. 1 shows a cross section of the front central portion of the hot air heater 1 according to the present invention.

  As shown in the figure, this hot air heater 1 is a hot air heater of the type used by being placed on the floor surface F, and a combustion section for heating air is provided inside the housing 2 of the appliance. 3, a convection fan 4 for forcibly blowing the air heated by the combustion unit 3 as warm air outside the instrument, and a plurality of guide plates 5 for controlling the air flow in the housing 2. The room temperature air is joined to the lower area of the hot air blown out from the hot air outlet 7, and the temperature of the hot air in the lower area is set to other areas (the middle area and the upper area of the hot air blown out). The air mixing mechanism 6 is configured to be lower than the temperature of the air.

  The housing | casing 2 comprises the outer frame of the warm air heater 1, Comprising: It forms by forming a metal member in substantially box shape. A warm air outlet 7 is provided on the front surface of the housing 2, and an air suction port (first suction portion) 8 for taking combustion air into the housing 2 on the back surface. Is provided.

  The combustion unit 3 is a combustion unit housed in the housing 2. In this embodiment, a known gas burner using gas as fuel is used as the combustion unit. Specifically, the gas burner is provided with a gas solenoid valve, a gas proportional valve, and the like (not shown), and these gas solenoid valve and gas proportional valve can be controlled by a control unit (not shown).

  Further, in relation to the combustion section 3, reference numeral 9 in the figure indicates a discharge electrode for igniting the gas burner, and reference numeral 10 indicates a thermocouple for detecting a combustion flame of the gas burner. . Reference numerals 11 and 12 denote overheat prevention devices. Since the discharge electrode 9, the thermocouple 10, and the overheat prevention devices 11 and 12 are all well-known components in the hot air heater, description thereof will be omitted.

  The convection fan 4 is a blower fan provided to forcibly blow out the air heated by the combustion unit 3 to the outside of the appliance. The convection fan 4 is configured to be controllable by the control unit. In the present embodiment, the convection fan 4 is also used as a fan for sucking air from the air suction unit 8.

  That is, the hot air heater 1 of the present embodiment guides the air introduced from the air suction port 8 to the combustion unit 3 in the housing 2, and the air heated by the combustion unit 3 is convection fan 4. A plurality of guide plates 5 are arranged so as to be guided to the hot air outlet 7 through the air flow. By driving the convection fan 4, an air flow as indicated by arrows in FIG. It is configured to occur. That is, by driving the convection fan 4, air necessary for combustion is introduced from the air suction port 8 to the combustion unit 3, and the air heated by the combustion unit 3 is drawn to the convection fan 4 and led to the convection fan 4. In addition, the convection fan 4 is configured to be blown out of the appliance from the hot air outlet 7. In the following description, the passage from the convection fan 4 to the warm air outlet 7 is referred to as a warm air passage.

  The air mixing mechanism 6 is a mechanism for lowering the temperature of the lower region of the hot air blown from the hot air outlet 6 to be lower than the temperature of other regions (the middle and upper regions of the hot air blown out). Specifically, one end is connected to a second air suction port (second suction portion) 13 and the other end is configured by an air introduction passage 14 opened at the bottom surface of the warm air passage. .

  In the present embodiment, the second air inlet 13 is disposed below the hot air outlet 7 (see FIG. 2), and the opening 15 at the other end of the passage 14 is provided with the hot air passage (specifically, Is provided in the vicinity of the hot air outlet 7 of the hot air passage. The details of the passage 14 will be described later.

  The hot air outlet 7 constitutes an outlet for blowing out the air heated by the combustor 3 as hot air to the outside of the appliance, and this hot air outlet 7 can blow the hot air along the floor surface F. Thus, it is provided in the lower part (specifically, the position near the floor surface F) of the instrument front. More specifically, the warm air outlet 7 is opened at the lower front portion of the housing 2 so as to form a rectangular outlet extending substantially in the entire width direction of the appliance in the lower front portion of the appliance in front view. ing.

  The warm air outlet 7 is provided with a plurality of (in the illustrated example, five) louvers 16, 16,... In the height direction. These louvers 16, 16,... Set the direction of warm air blown out from the warm air outlet 7. In this embodiment, any louvers 16, 16,. (See FIG. 3). That is, in the warm air heater 1 of this embodiment, the warm air blowing direction is fixed to a preset blowing direction, and the user cannot freely adjust the blowing direction.

  This is because it is desirable to set the angle of the louvers 16 (especially the lowermost louver) in advance so that the action of the air mixing mechanism 6 described later functions sufficiently. It is also possible to make a part of the movable louver capable of arbitrarily adjusting the angle.

  Here, in this embodiment, since the 2nd air suction inlet 13 of the air mixing mechanism 6 is arrange | positioned under the warm air blower outlet 7, the warm air blower outlet side end of the housing | casing 2 which comprises a warm air channel | path. The portion is bent in a substantially L shape so as to expand downward, and a step is provided in the opening, and the downwardly expanded space formed by the step is used as the second air suction port 13, the passage 14, and the opening 15. And the warm air blower outlet 7 and the 2nd air inlet 13 are comprised using the lowermost louver 16 of the said louvers 16,16, ....

  That is, in the present embodiment, the lowermost louver 16 is used as both a partition plate that separates the hot air outlet 7 and the second suction port 13 and a ceiling plate of the air introduction passage 14. When the lowermost louver 16 is attached, the louver 16 is formed such that a gap constituting the opening 15 is formed between the base end of the louver 16 on the housing side and the housing 2. Is attached to the housing 2 (see FIG. 3).

  The gap between the lowermost louver 16 and the housing is set to be about several millimeters (for example, 2 to 3 mm). This is because, if this interval is too wide, the warm air flowing through the warm air passage tends to flow into the passage 14, so that such inflow does not occur. In relation to this, the height position (more specifically, the height of the upper surface of the base end portion) of the base end portion of the lowermost louver 16 (in other words, the peripheral portion of the opening 15 on the warm air outlet side). Position) so as not to disturb the flow of hot air flowing through the hot air passage (in other words, on the upstream side in the hot air blowing direction upstream of the opening 15 of the casing 2 constituting the hot air passage). The peripheral position is set lower than the height position (more specifically, the height position of the bottom surface of the warm air outlet side end of the warm air passage). In this embodiment, the difference L between the height positions of the two is set to about 1 mm (see FIG. 2).

  Moreover, in this embodiment, this clearance gap (namely, opening 15) is formed over the full length of the width direction of the warm air blower outlet 7 (refer FIG. 3). This is to allow the air introduced from the opening 15 to the warm air passage to join the entire lower region of the warm air blown from the warm air outlet 7.

  By the way, the air introduced into the hot air passage from the opening 15 is for lowering the temperature of the lower region of the hot air flowing through the hot air passage, as will be described later. Any shape can be used as long as it can be achieved. For example, the hot air outlet 7 is provided only at a predetermined position in the width direction (for example, the central portion), or at a plurality of locations at predetermined intervals in the width direction of the hot air outlet 7. You may comprise so that it may form in the part of the width direction of the warm air blower outlet 7, such as providing. In short, the shape of the opening 15 (its width dimension, arrangement position, number of arrangements, etc.) depends on the state of the hot air blown out from the hot air outlet (the temperature of the hot air blown out, its width, etc.). The design can be changed as appropriate.

  The louver 16 shown in FIG. 3 has a shape with its tip folded back, but this is to prevent foreign objects such as fingers from being inserted between the louvers 16, 16. The specific shape of can be changed as appropriate. That is, the number of louvers 16 can be increased to form a flat plate that does not have its tip folded back.

  The air suction port 8 constitutes a suction port for taking combustion air into the housing 2, and the air suction port 8 is provided with a filter so as not to suck dust and dust. In the present embodiment, the air introduced from the air suction port 8 is used for combustion of the combustion unit 3, and the combustion flame does not hit the guide plate 5 disposed above the combustion unit 3. As described above, the tip of the combustion flame is deflected sideways (the tip portion of the combustion flame is tilted to the front side of the instrument).

  Next, operation | movement (especially effect | action of the air mixing mechanism 6) of the warm air heater 1 comprised in this way is demonstrated using FIG.1 and FIG.2.

  When an operation for instructing the start of the heating operation is performed by an operation unit (not shown), the control unit of the hot air heater 1 drives the convection fan 4 and controls the gas electromagnetic valve and the gas proportional valve to control the fuel gas. The fuel is supplied to the combustion unit 3 to discharge the discharge electrode and ignite the combustion unit 3.

  Thereby, the air introduced from the air suction port 8 is introduced into the housing 2 while forming a flow as indicated by the arrow in FIG. And the air heated by the combustion part 3 is drawn in to the convection fan 4 side along the guide plate 5, and blows out through the warm air passage from the warm air outlet 7 provided in the lower part of the front of the instrument to the outside of the instrument. Is done.

  At that time, since the warm air heater 1 according to the present invention is provided with the air mixing mechanism 6 described above, the air mixing mechanism 6 is introduced into the lower region of the warm air blown from the warm air outlet 7. The air to be joined merges, and the temperature of the lower region is lower than the other middle and upper regions.

  That is, as shown in FIG. 2, when hot hot air blown out by the convection fan 4 flows through the hot air passage at a high speed (see arrow A in the figure), the outside air ( Unheated room temperature air) passes through the passage 14 from the second suction port 13 and merges into the hot air passage from the opening 15 provided in the bottom surface of the hot air passage (see arrow B in the figure).

  Thereby, among the warm air blown out from the warm air outlet 7, the warm air in the lower region (see arrow C in the figure) is heated and the hot air flowing through the warm air passage and the second suction port 13 are heated. Unheated room temperature air that has flowed in from the air is mixed, and the temperature decreases due to the mixing of unheated air, resulting in a lower temperature than the warm air in other areas (see arrow D in the figure). Then, it is blown out from the hot air outlet 7.

  Therefore, according to the hot air heater 1 of the present invention, even if the hot air blown out from the hot air outlet 7 is blown out horizontally or below the horizontal, the low-temperature hot air in the lower region is blown to the floor F. Therefore, the temperature of the floor surface F can be prevented from excessively rising, and the hot air blowing direction (setting angle of the louver 16) is set downward (with a depression angle) from the horizontal. Will be able to.

  And since the warm air can be blown out along the floor surface F in this way, according to the warm air heater 1 of the present invention, the air in the room can be efficiently stirred, and the heating efficiency is high. An indoor heating effect can be obtained in a short time, and a hot air heater with low fuel consumption and high energy saving effect can be provided.

  Furthermore, since the warm air can be blown out along the floor surface F, the warm air can be delivered to the feet of the user at a remote position. In particular, in the present invention, although the temperature of the lower region of the hot air blown out from the hot air outlet 7 is lower than the temperature of the other regions (in the hot air, the upper region), Is a mixture of high-temperature hot air and air taken from the room, so it will be hot air at least higher than room temperature, so even if hot air in the lower area is blown to the user's feet, This prevents the user from feeling cold and does not make the user feel uncomfortable.

  In the present embodiment, the lowermost louver 16 is used as the partition plate that separates the hot air outlet 7 and the second suction port 13 and the ceiling plate of the air introduction passage 14. For example, as shown in FIG. 4 (a), instead of the lowermost louver 16, the shape of the housing 2 may be changed to dispose the passage forming member 2a and thereby the passage 14 may be formed. is there. In this case as well, the height position of the peripheral edge of the opening 15 on the warm air outlet side is lower than the height position of the peripheral edge of the opening 15 on the upstream side in the hot air blowing direction as in the embodiment described above. It is the same.

  Moreover, although the case where the exit (opening 15) by the side of the warm air channel | path of the air mixing mechanism 6 was directly opened by the bottom face of the warm air channel | path was shown in embodiment mentioned above, in this exit, FIG. As shown in b), there is provided a flange 2b formed by extending the end portion of the casing 2 on the side of the hot air outlet in a bowl shape, and the flange 2b is configured to prevent inflow of warm air into the passage 14. It is also possible.

Embodiment 2
Next, a second embodiment of the present invention will be described with reference to FIG.
The warm air heater 1 ′ shown in the present embodiment is obtained by modifying the arrangement position of the second air suction port 13 in the hot air heater 1 according to the above-described first embodiment, and accordingly, the passage 14. Except for the fact that the arrangement is changed, the other configurations are almost the same as those of the first embodiment, and therefore, the portions having the same configurations are denoted by the same reference numerals and the description thereof is omitted.

  That is, in the warm air heater 1 ′ shown in the present embodiment, the second air suction port 13 ′ is disposed on the back surface of the appliance (housing 2). Specifically, a second air suction port 13 'is provided in the lower part of the back surface of the housing 2, one end communicates with the second air suction port 13', and the other end is the temperature of the hot air passage. A passage 14 ′ opened (15 ′) at the bottom of the hot air passage in the vicinity of the air outlet 7 is provided below the hot air passage.

  When the second air suction port 13 'is provided on the back surface of the appliance in this way, the hot air blowing of the casing 2 that constitutes the hot air passage as in the hot air heater 1 shown in the first embodiment described above. Although it is not necessary to form the outlet side end portion so as to spread downward, the structure of the housing 2 can be simplified. Even in this case, the height position of the peripheral edge portion on the hot air outlet side of the opening 15 ′ is the hot air blowing direction. It is the same as that of embodiment mentioned above to comprise so that it may become lower than the height position of the peripheral part of an upstream.

  Thus, when the second air suction port 13 'is provided on the back surface of the instrument as in the present embodiment, the distance of the passage 14' from the second air suction port 13 'to the opening 15' on the bottom surface of the hot air passage. However, when the air is introduced from the second air inlet 13 ', it is not affected by the hot air blown from the hot air outlet 7, so that the outside air can be efficiently sucked accordingly. become.

  By the way, in this embodiment, although the case where the said 2nd air inlet 13 'was provided in the instrument back surface was shown, this 2nd air inlet 13 may be provided in an instrument side, for example. Further, if outside air can be introduced (for example, when there is a gap between the bottom plate of the appliance and the floor F), the second suction port 13 is provided on the bottom of the appliance. May be.

  Note that the above-described embodiments merely show preferred embodiments of the present invention, and the present invention is not limited to these, and various design changes can be made within the scope thereof.

  For example, in the above-described embodiment, the case where the present invention is applied to a combustion-type hot air heater using gas as a fuel is shown. However, the present invention is a combustion-type using a fuel (for example, petroleum) other than gas. Of course, it can also be applied to hot air heaters, but if it has a configuration that forcibly blows out hot air, a non-combustion type hot air heater (for example, an electric heater or hot water for air heating as a heat source) It can also be applied to a warm air heater equipped with a heat exchanger or the like.

  In the above-described embodiment, the case where the convection fan 4 for blowing hot air is also used as the fan for sucking air from the air suction portion 8 is shown. However, the fan for sucking air and the fan for blowing hot air are used. May be provided separately.

1, 1 'Hot air heater 2 Housing 3 Combustion unit 4 Convection fan 5 Guide plate 6 Air mixing mechanism 7 Hot air outlet 8 Air inlet (first inlet)
13, 13 'second air inlet (second inlet)
14, 14 'Air mixing mechanism passage 15, 15' Air mixing mechanism opening 16 Louver F Floor

Claims (7)

In the hot air heater having a structure for heating the air introduced from the first suction portion and forcibly blowing the heated air from the hot air outlet through a predetermined hot air passage in the appliance,
The warm air blow near the outlet of the warm air passage, temperature, characterized in that it comprises an air mixing mechanism for combining the non-heated air introduced from the second suction unit in the lower region of the hot air through the hot air passage Wind heater.   The said air mixing mechanism is comprised by the channel | path for an air introduction in which one end leads to the said 2nd suction part and the other end is opened by the bottom face of the said warm air channel | path. Hot air heater.   The hot air heater according to claim 2, wherein the opening on the warm air passage side of the air mixing mechanism is formed over the entire length in the width direction of the warm air outlet or part of the width direction. .   The opening on the warm air passage side of the air mixing mechanism is characterized in that the height position of the peripheral portion on the warm air outlet side is set lower than the height position of the peripheral portion on the upstream side in the hot air blowing direction. The warm air heater according to claim 2 or 3.   The hot air heater according to any one of claims 1 to 4, wherein the second suction portion is disposed below the hot air outlet on the front of the appliance.   A plurality of louvers are provided in the height direction of the hot air outlet, and the lowermost louver of these divides the hot air outlet and the second suction portion and forms part of the air introduction passage. It arrange | positions so that it may do. The hot air heater of Claim 5 characterized by the above-mentioned.   The hot air heater according to any one of claims 1 to 4, wherein the second suction portion is disposed on a back surface or a side surface of the device.

Images