JP4161100B2 - Heat exchanger for hot air heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat exchanger of the hot air heater with reduced thermal Ibitsuon due to thermal expansion and contraction of the combustion chamber become a high temperature to cover the combustion flame.
[0002]
[Prior art]
In the basic structure of the heat exchanger of the conventional hot air heater, as shown in FIGS. 5 and 6, the indoor air 2 is sucked from the rear of the appliance by the convection fan 1, and inside the combustion chamber 4 located above the burner 3. Combustion increases the temperature of the sucked air passing through and near the combustion chamber 4, passes through the passage 5 in the heat exchanger, and enters the room again from the outlet 6 in front of the appliance. Blows out as wind 7.
[0003]
Further, in the configuration of the burner 3 and the combustion chamber 4, as shown in FIG. 6 , fuel and air are sucked into the burner 3 from the suction port 8 to become a mixed gas and blown upward from the flame port 9 on the upper surface of the burner 3.
[0004]
Further, in the combustion chamber 4 attached to the upper part of the burner 3 with the screw 10, a combustion wall A <b> 13 for closing each side of the combustion box 11 with the four claws 12 provided on both sides of the combustion box 11 to form a box shape. performing fixed vertically bent so that there is no gap between the combustion walls B14 so as not come off easily crowded difference in each four not a one of Tsumeana 15 provided in the strong and combustion wall A13 and combustion walls B14 and Is.
[0005]
[Problems to be solved by the invention]
However, in the conventional configuration, the combustion box that covers the combustion flame has a large thermal expansion and contraction due to the high temperature, and the holding strength of the claws of the combustion box that fixes the combustion wall A and the combustion wall B is reduced. It was. As a result, the thermal expansion / contraction force exceeded the holding strength of the nail, and a rubbing noise, that is, a thermal distortion noise was generated at the portion where the nail and the combustion wall A and the combustion wall B were in surface contact.
[0006]
Note that increasing the holding strength of the nail that fixes the combustion box tends to have a good effect on thermal distortion sound, but if long-term use is taken into consideration, the holding strength will someday decrease. It is considered that thermal distortion sound is generated.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention is designed to fix the combustion chamber to the surface of the nail and the combustion wall A after inserting the nail into the nail hole without fixing the nail of the combustion box and the combustion wall A and the combustion wall B. And it is set as the structure which bends a nail | claw in the position where a clearance gap is made in the surface with the combustion wall B. As a result, the claw, the combustion wall A, and the combustion wall B are loosened to give a degree of freedom, and the strength of the claw becomes unnecessary.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
According to a first aspect of the present invention, there is provided a burner for ejecting fuel, and a box-like combustion chamber attached on the burner for burning the fuel, and the combustion chamber has a U-shape and has a lower opening. And a combustion box provided with a combustion port for forming a combustion flame on its upper surface facing each other and a claw protruding on both sides, and both side surfaces of the combustion box provided with holes for inserting the claw respectively. The combustion box is enclosed, and when the claw of the combustion box is inserted into the hole of the combustion wall and the tip of the claw is bent , the combustion box thermally expands and contracts between the combustion wall and the bent surface of the claw. By having the combustion chamber provided with a predetermined gap larger than the amount , play is generated between the nail and the combustion wall, thereby providing a degree of freedom, and the strength against thermal expansion and contraction applied to the nail becomes unnecessary. Thereby, generation | occurrence | production of a thermal distortion sound can be suppressed.
[0009]
According to the second aspect of the present invention, by providing a notch at the position where the tip of the nail protruding on both sides of the combustion box is bent, the bending of the nail is facilitated and the bending position is easily stabilized. The same effect as in the first aspect can be obtained.
[0010]
According to the third aspect of the present invention, by providing a concave linear shape at the position where the tip of the nail protruding on both sides of the combustion box is bent, it becomes easy to bend the nail and stabilize the bending position. Thus, the same effect as in the first aspect can be obtained.
[0011]
According to the fourth aspect of the present invention, the claw protruding on both sides of the combustion box is inserted into the hole of the combustion wall, and the claw is not bent, so that the bending process of the claw becomes unnecessary and the work process is reduced. The effect similar to that of the first aspect can be obtained.
[0012]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0013]
(Example 1)
FIG. 1 is a detailed view of the combustion chamber in the heat exchanger of the hot air heater according to the first embodiment of the present invention, and the basic configuration of the heat exchanger as the hot air heater is the same as the conventional one.
[0014]
In the figure, the four claws 17 provided on both sides of the combustion box 16 constituting the combustion chamber are inserted into the four claw holes 15 of the combustion wall A13 for closing the both sides of the combustion box 16 into a box shape, The claw 17 is bent inward so as to ensure a gap t between the claw 17 and the combustion wall A13.
[0015]
The claw bending direction may be outside.
[0016]
With respect to this gap t, a thermal expansion is ensured so that a gap t equal to or greater than a value obtained by multiplying the thermal expansion coefficient α of the combustion box 16 and the maximum temperature Y under actual use conditions, that is, t> α * Y can be secured.・ Provide more freedom than the amount of contraction.
[0017]
However, although not shown in the figure, the same configuration is performed on the combustion wall B side opposite to the combustion wall A13.
[0018]
With this configuration, even if the combustion box 16 is affected by thermal expansion / contraction due to a high temperature and exerts a force on the claw 17, it does not come into surface contact with the combustion wall A13 due to the degree of freedom provided, and thermal distortion Generation of sound can be eliminated.
[0019]
(Example 2)
FIG. 2 is a detailed view of a combustion box according to a second embodiment of the present invention, and the basic configuration of a heat exchanger as a hot air heater is the same as that of the conventional one.
[0020]
In the drawing, a notch 20 is provided at the bending position of the claw 19 of the combustion box 18 constituting the combustion chamber, and has the same configuration as described in the first embodiment, and the claw 19 and the combustion wall A13. When bending so as to secure a gap t between them, the same effects as described in the first embodiment can be obtained in that the bending process is easy and the bending position is easily stabilized.
[0021]
However, although not shown in the figure, the same configuration is performed on the combustion wall B side opposite to the combustion wall A13.
[0022]
(Example 3)
FIG. 3 is a detailed view of a combustion box according to a third embodiment of the present invention, and the basic configuration of a heat exchanger as a hot air heater is the same as that of the conventional one.
[0023]
In the figure, a linear shape 23 is provided in the concave in the bending direction at the bending position of the claw 22 of the combustion box 21 constituting the combustion chamber, and has the same configuration as described in the first embodiment. When bending so as to secure a gap t between the claw 22 and the combustion wall A13, the bending process is easy and the bending position is easily stabilized, and the same effect as described in the first embodiment is obtained. can get.
[0024]
However, although not shown in the figure, the same configuration is performed on the combustion wall B side opposite to the combustion wall A13.
[0025]
Example 4
FIG. 4 is a detailed view of a combustion box according to a fourth embodiment of the present invention, and the basic configuration of a heat exchanger as a hot air heater is the same as that of the conventional one.
[0026]
In the figure, the claw 25 of the combustion box 24 constituting the combustion chamber is not bent, and has the same configuration as that described in the first embodiment. The same effect as described in Example 1 is obtained.
[0027]
However, although not shown in the figure, the same configuration is performed on the combustion wall B side opposite to the combustion wall A13.
[0028]
【The invention's effect】
As described above, according to the present invention, as a configuration of the fitting portion in forming the box-shaped combustion chamber, a gap is provided instead of fixing each claw and each combustion wall on both sides of the combustion box. By creating a degree of freedom, the thermal expansion / contraction force due to the high temperature applied from the combustion box to the nail can be released. As a result, it is possible to suppress the generation of the noise generated when the claws and the combustion wall come into contact with each other, that is, the heat distortion noise.
[Brief description of the drawings]
FIG. 1 is a partial perspective view showing a relationship between a combustion wall A and a claw in a heat exchanger of a hot air heater according to Embodiment 1 of the present invention. FIG. 2 shows heat of the hot air heater according to Embodiment 2 of the present invention. The partial perspective view which shows the form of the nail | claw in an exchanger [FIG. 3] The partial perspective view which shows the form of the nail | claw in the heat exchanger of the warm air heater of Example 3 of this invention FIG. FIG. 5 is a partial perspective view showing another nail configuration in the heat exchanger of the hot air heater. FIG. 5 is a basic configuration diagram when the heat exchanger of the conventional hot air heater is viewed from the side. Detailed view of combustion chamber and burner in heat exchanger of wind heater [Explanation of symbols]
1 Convection fan 3 Burner 4 Combustion chamber 11 Combustion box 12 Claw 13 Combustion wall A
14 Combustion wall B
15 Claw hole 20 Notch 23 Linear

Claims (4)

It has a burner that ejects fuel and a box-shaped combustion chamber that is attached on top of it and burns the fuel. The combustion chamber is U-shaped, with the opening located below, and burning on the upper surface that faces it Combustion box for forming a flame, a combustion box provided with claws protruding on both sides, and a combustion wall surrounding each side surface of the combustion box provided with holes for inserting the claws, When inserting a nail into the hole of the combustion wall and bending the tip of the nail, a combustion chamber is provided with a predetermined gap larger than the amount of thermal expansion and thermal contraction of the combustion box between the combustion wall and the bent surface of the nail A heat exchanger for hot air heaters.   The heat exchanger for a hot air heater according to claim 1, wherein a notch is provided at a position where the tips of the claws protruding on both sides of the combustion box are bent.   The heat exchanger for a hot air heater according to claim 1, wherein a linear shape is provided in a concave shape at a position where the tip of the claw protruding on both sides of the combustion box is bent. It has a burner that ejects fuel and a box-shaped combustion chamber that is attached on top of it and burns the fuel. The combustion chamber is U-shaped, with the opening located below, and burning on the upper surface that faces it Combustion box for forming a flame, a combustion box provided with claws protruding on both sides, and a combustion wall surrounding each side surface of the combustion box provided with holes for inserting the claws, A heat exchanger for a hot air heater , wherein the nail is not bent by inserting the nail into the hole of the combustion wall .

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