JPH0213860Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hot air heater equipped with an air filter that filters primary air and secondary air.

(Prior art) As a conventional hot air heater, a partition wall is provided between the primary air inlet and the secondary air inlet in the heater body to prevent mixing of primary air and secondary air. It is known that an air filter is provided with a common window facing the suction port through which both types of air pass, and a filter member provided on the window.

(Problem to be solved by the invention) By the way, the primary air of the hot air heater is supplied to the burner as combustion air, and if it is mixed with dust, it will cause incomplete combustion in the burner, so the mesh It is preferable to pass through a relatively fine filter member to reduce dust contamination as much as possible, and since the secondary air of a hot air heater is mainly used as hot air for heating, a small amount is sufficient for heating. Therefore, it is preferable to pass through a filter member with a relatively coarse mesh to obtain a large amount.

However, in the conventional type, the same filter member is applied to the entire window frame, and if the mesh is relatively fine, a large amount of secondary air cannot be obtained, and there is an inconvenience that sufficient heating cannot be obtained. ,
Further, if the mesh is relatively coarse, dust may be mixed into the primary air, causing incomplete combustion in the burner.

Therefore, in order to eliminate the above-mentioned inconvenience, a first filter member with a relatively fine mesh is provided in the primary air passage area of the window, and a second filter member with a relatively coarse mesh is provided in the secondary air passage area of the window. However, in this case, since there is no member to support them at the overlapping part of the boundary between both filter members, both filter members loosen and create a gap between them and the partition wall of the heater main body. Dusty air that has not yet been filtered by the air filter or air mixed with dust that has been filtered by the second filter member enters the primary air suction port from the primary air suction port, resulting in incomplete combustion in the burner.

(Means for Solving the Problems) The present invention is intended to solve the above-mentioned inconveniences, and the present invention is to provide a space between the primary air inlet and the secondary air inlet in the main body of the heater. An air filter is provided in which a partition wall is provided to prevent the mixing of air, a common window is provided facing both suction ports and allows both air to pass through, and a filter member is applied to the window, wherein the filter member is It is composed of a first filter member with a relatively fine mesh applied to the primary air passage area of the window, and a second filter member with a relatively coarse mesh applied to the secondary air passage area of the window, and the boundary between the two filter members is The first filter member and the partition are overlapped with each other so that the first filter member is on the heater main body side, and a reinforcing portion is formed along the boundary at least on the first filter member side of the overlapped part to separate the first filter member and the partition. It is characterized by the fact that there are no gaps between it and the wall.

(Function) The present invention has the above configuration. According to this, the primary air passes through the first filter member with a relatively fine mesh and is sufficiently filtered, so that when it is supplied to the burner, there is no possibility of contamination with dust. Since the secondary air passes through the second filter member, which has a relatively coarse mesh, and is obtained in a large amount, it effectively functions as hot air for heating. In this case, since a reinforcing portion is formed along the boundary at least on the side of the first filter member in the overlapped portion of the boundary between both filter members, at least the first filter member is reinforced thereby, and the first filter member is prevented from loosening. There are no gaps between the member and the partition wall, so that no dust can enter the primary air inlet from the overlapped part, and the burner always burns completely.

(Example) Next, an example of the present invention will be described based on the drawings.

In Figures 1 to 3, reference numeral 1 denotes a combustion case 3 equipped with a burner 2 inside, and a combustion case 3 that supplies primary air for combustion to the burner 2, sucks in indoor secondary air, and blows warm air into the room. The main body of the heater includes a fan 4 for discharging the air, and a primary air suction port 6 and a secondary air suction port 7 provided with a reinforcing net 5 are provided at the upper part of the back surface of the heater main body 1. A guide/fixing member 9 is provided on the periphery of the suction ports 6, 7 for mounting the air filter 8 shown in FIG. 4 from above as shown in FIG. In the figure, numeral 10 indicates a partition wall consisting of a gap 10a between the primary air suction port 6 and the secondary air suction port 7, and an outer wall 10b of the combustion casing 3 provided continuously therewith.

The air filter 8 includes a frame body 12 having a common window 11 through which primary air and secondary air pass, and a first filter member 13 having a relatively fine mesh provided in the primary air passage area of the window 11 of the frame body 12. and a second filter member 14 with a relatively coarse mesh applied to the secondary air passage area of the window 11 of the frame 12, and the first filter member 13 covers the boundary between the two filter members 13 and 14. The first filter member 13 and the partition are overlapped with each other so as to be on the side of the heater main body 1, and a reinforcing part B having a wave-shaped cross section along the border is formed at least on the first filter member 13 side of the overlapped portion A, so that the first filter member 13 and the partition are It was made so that there would be no gap between it and the wall 10.

Specifically, the air filter 8 is manufactured as follows.

First, a frame 12 is punched out from a rectangular stainless steel plate to form a common window 11 for passing primary air and secondary air.
form. Next, a first filter member 13 made of a 50# stainless steel plate is applied to the primary air passage area of the window 11 of the frame 12, and the window 11 of the frame 12 is
A second filter member 14 made of a 30# stainless steel plate is provided in the secondary air passage area. Then the frame 12
The peripheral edges of the three sides of the frame body 12 are bent inward to fix the first and second filter members 13 and 14, and the peripheral edge of the remaining one side of the frame 12 is slightly bent. 8. Forms a handle when attaching and detaching. Finally, as shown in FIG. 7, trapezoidal protrusions 13a and 14a are formed and reinforced in the primary air passage area and secondary air passage area of the first and second filter members 13 and 14, respectively, using a press. Also, the overlapped portion A of the boundary between both filter members 13 and 14
A reinforcing portion _B1 having a wavy cross section with a pointed tip is formed along the border on the side of the first filter member 13 to prevent the first filter member 13 from loosening, and to prevent the first filter member 13 from loosening. In addition, a reinforcing part B ₂ is also formed at a location opposite to the reinforcing part B ₁ of the first filter member 13 on the second filter member 14 side, so that both filter members 13,
14 from separating, and both filter members 1
No gap was created between 3 and 14.

In this case, when the air filter 8 is attached to the heater main body 1, between the first filter member 13 of the air filter 8 and the partition wall 10 of the heater main body 1, and between the first filter member 13 and the second filter member 14.
There is no gap between the
When the fan 4 inside the heater body 1 is driven, indoor air is sucked, and the primary air is passed through the primary air suction port 6.
First filter member 1 with a relatively fine mesh on the side
3, the primary air is thoroughly filtered here, and is led to the burner 2 in the combustion chamber 3 as primary air with very little dust, where it acts effectively for proper combustion in the burner 2, and the secondary air is It passes through a second filter member 14 with a relatively coarse mesh on the side of the secondary air suction port 7, is coarsely filtered here, is guided around the combustion casing 3 as a sufficient amount of secondary air, is heated, and is heated again. It is blown into the room and effectively acts as warm air for heating.

In addition, in the illustrated one, both filter members 13 and 14
Although the reinforcing part B having a wavy cross section with a pointed tip is formed at the overlapped part A of the boundary between the two parts, the invention is not limited to this.
For example, the reinforcing part B can have an arbitrary wavy cross-sectional shape, such as a reinforcing part B having a sinusoidal cross-section.

Further, in the above embodiment, only the ends of the first and second filter members 13 and 14 are overlapped, but as shown in FIG. It is also possible to overlap the second filter members 13 and 14, and in this case, the filter members 13 and 14 of FIG. Reinforcement part B ₁ with a wave-like cross section in the opposite direction to
Although B ₂ is applied, it is not necessary to provide the reinforcing portion B ₂ on the second filter member 14 side.

(Effect of the invention) As described above, according to the invention, the boundary portion between the first and second filter members of the air filter is overlapped with each other so that the first filter member faces the heater main body side, and at least the overlapping portion is A reinforcing part is formed along the boundary on the first filter member side to prevent a gap from forming between the first filter member and the partition wall, so dust does not enter from this part, and in particular, primary air is It has the effect of being able to be sucked into the heater body in a clean state.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of the back side of the hot air heater body showing an example of implementation of the present invention, and Fig. 2 is an external perspective view showing a part of the front side of the hot air heater shown in Fig. 1 with a cutout. figure,
FIG. 3 is a sectional view taken along the line -- in FIG. 2, FIG. 4 is a perspective view showing an example of the implementation of the air filter of the present invention, and FIG. 5 shows the air filter in FIG. A perspective view of the back side when attached to the 6th
The figure is a perspective view showing the frame of the air filter in Figure 4;
Figure 7 is a sectional view taken along the - line in Figure 4, and Figure 8 is a cross-sectional view of Figure 4.
FIG. 7 is a cross-sectional view showing a modification of the figure. 1... Heater main body, 6... Primary air suction port, 7
...Secondary air suction port, 8...Air filter, 10
...Partition wall, 11...Window, 13...First filter member, 14...Second filter member, A...Overlapping portion, B...Reinforcing portion.

Claims (1)

[Scope of utility model registration request] Common 1: A partition wall is provided between the primary air suction port and the secondary air suction port in the heater body to prevent mixing of primary air and secondary air, and the partition wall is placed opposite to both suction ports to allow both air to pass through. In the air filter, the air filter is provided with a first filter member having a relatively fine mesh provided in the primary air passage area of the window, and a first filter member having a relatively fine mesh provided in the primary air passage area of the window, and a filter member provided on the window. and a second filter member with a relatively coarse mesh provided in the air passage area, and the first filter member is overlapped with each other so that the boundary between the two filter members is on the side of the heater main body,
A hot air heater characterized in that a reinforcing portion is formed along the boundary at least on the first filter member side of the overlapping portion so that no gap is created between the first filter member and the partition wall. .