JP2956462B2 - Filter structure of hot air heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for a convection fan in a hot-air heater for applying hot air from a convection fan to a heat source section comprising a combustion section for burning gas or oil. It is about structure.

[0002]

2. Description of the Related Art In a warm air heater, heat is radiated from a heat source into a flow path of a frame. A convection fan provided at the back of the frame blows indoor air into an air flow path to generate warm air. Producing. On the suction side of this convection fan, a fan guard made of punched metal or a thick wire is attached with an air circulation hole large enough to prevent the hand or finger of an infant, and a fine A wire mesh fan cover that also functions as a filter with a mesh is attached.

A fan guard formed of a punched metal or a thick wire may be screwed at two to four locations. However, a wire mesh fan cover using a thin wire of about 0.5 mm is usually mounted on a fan guard because it is easily deformed or deformed into a diamond shape as it is. In addition, when the fan cover is used alone, as shown in FIG. 4, the entire periphery of the fan cover is folded back to reinforce the end surface of the wire so that it does not fall apart. Further, the end of the folded portion is slightly bent. It has strength.

[0004] In the fan cover made of wire mesh whose strength is enhanced by the folded portion, the mesh of the bent portion is screwed at a large number of places at a fine pitch using screw holes, and only the fan cover made of wire mesh is connected to the air inlet portion. It has also been fixed to. The fine mesh fan cover, which has been reinforced in this way, prevents hands and fingers from entering, prevents large dust from passing through small dust floating in the room, and prevents cotton dust from adhering to the convection fan. An effect can be obtained.

[0005]

Since the air on the suction side of the convection fan is where room air flows, fine dust such as cotton dust adheres to the fan cover made of fine mesh so that the convection fan cannot be used. And a filter that keeps dust out of the air channel. In addition, it is common to remove the dust from the dust attached to the mesh by removing the fan cover, but it is quite troublesome to remove and remove many fixing screws and it is very difficult to handle. Had become.

[0006] In addition, even if the wire material is folded, the wire cover is hurt when the wire material is in contact with the wire material on the end face of the filter, and the end face of the wire mesh tends to be scattered. Even if the fan guard parts are omitted and cost reduction is aimed at, there are many problems in use.

In the case of a wire mesh filter, the above problem is prevented by casting the outer peripheral edge into a resin frame. However, in order to firmly fuse the wire mesh filter and the resin frame, it is necessary to use a mesh. It is necessary to cast much of the periphery of the wire, and if the number of cast parts is increased, the strength will be obtained, but the effective opening area of the wire mesh filter when the outer dimensions are the same will be reduced, making it difficult to use it for multiple models. In addition, there is a problem that the material cost increases due to the large volume of the resin frame.

[0008]

The present invention proposes the following in order to solve the above-mentioned problems. That is, it has a heat source portion provided in the frame 1 and a convection fan 2 facing the heat source portion, and a wire mesh filter 3 having a fine mesh is provided on the suction side of the convection fan 2. 3
The convection fan 2 sends the room air that has passed through the wire mesh filter 3 to the heat source portion, and the hot air obtained by heat exchange with the heat source portion is formed on the frame 1 by the convection fan 2. In the hot air heater with a filter that blows out from the front into the room, the casting size of the wire mesh filter 3 is set to be small and the resin frame 4
And a protrusion 4a integrally formed with the resin frame 4 from a plurality of locations of the resin frame 4 in which the wire mesh filter 3 is cast, toward the inside with the filter surface. This is a filter structure of a warm air heater in which the wire mesh filter 3 is cast in the portion 4a.

Further, the filter surface in the central portion of the opening of the wire mesh filter 3 is pressed in a suitable shape to crush the intersection of the wires, and when the flat portion 3a is formed, there is no displacement even in a thin wire. The strength is improved.

[0010]

According to the present invention, the outer periphery of the wire mesh filter 3 is cast into the resin frame 4 to simplify the mounting of the wire mesh filter 3 and can be fixed by several screws like a conventional fan guard. Further, the end face treatment of the wire mesh filter 3 is not required, so that the manufacturing process of the filter is simplified. Further, when the end face of the wire mesh filter 3 is cast into the resin frame 4 as described above, a plurality of projections 4a are formed from the resin frame 4 toward the filter surface, so that the size of the resin frame 4 body is reduced. It was done.

Further, the filter surface of the wire mesh filter 3 is appropriately pressed to form a flat portion 3a by crushing the intersection of the wires near the center of the filter surface. The portion is no longer sticky, and even if the fan guard is formed only by the wire mesh filter 3, there is strong strength and there is no possibility of deformation.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the structure will be described with reference to the drawings showing an embodiment. Reference numeral 1 denotes a frame of a petroleum hot air heater which is an embodiment of the present invention. Have. 2
Is a convection fan attached to the back surface of the frame body 1 and facing the heat source section, and 3 is a fine mesh wire mesh filter provided to face the suction side of the convection fan 2. When rotated, the room air passes through the wire mesh filter 3 and is taken in, and is blown to a heat source section which has been burned and heated in advance. The indoor air that has been heat-exchanged by the heat source unit is turned into warm air by the combustion heat, and is blown into the room as warm air from a warm air outlet provided in the front portion of the frame 1 and used for heating.

Although the wire mesh filter 3 has a substantially square shape in the drawings showing the embodiment, it may be formed in a round shape, and the wire constituting the wire mesh filter 3 is as thin as possible, and the mesh has a filter effect of 12 to 12. A fine wire mesh of 20 mesh is good.

Reference numeral 4 denotes a resin frame cast so as to be sandwiched over the entire periphery of the end face of the wire mesh filter 3. By increasing the width of the resin frame 4, the wire material of the wire mesh filter 3 cast becomes resin. This resin frame 4 does not fall out of the frame 4
Can be used to fix the wire mesh filter 3 to the frame 1. The end face of the wire of the wire mesh filter 3 does not come off or deform during cleaning, and the exposed end face of the wire does not damage the skin.

The configuration in which the outer peripheral end surface is cast into the resin frame 4 without changing the size of the outer shape of the wire mesh filter 3 is as follows.
Since a certain width is required for the resin frame 4, there is a problem that the actual opening area of the filter is reduced and the amount of air passing therethrough is reduced. For this reason, the end face of the wire mesh filter 3 is bent into an L-shape and the L-shaped portion is cast into the resin frame 4 so that the end face of the wire mesh filter 3 does not easily come off and the resin frame 4 can be made thin. However, it is extremely difficult to accurately process a deformable wire mesh, which increases the cost.

According to the present invention, the substantial size of the resin frame 4 can be reduced even if the wire mesh filter 3 to be cast is left without any processing without any processing. The resin is a projection formed integrally with the resin frame 4 inwardly, and the synthetic resin is formed of a portion of the resin frame 4 and the projection 4.
It is cast together in part a. For this reason, the mesh of the wire mesh filter 3 is fixed even in the projection 4a.

In a specific embodiment, the size of the resin frame 4 is 5
mm and a height of about 5 mm, so that the first or second mesh of the wire mesh is applied to the inside of the resin frame 4. The end of the wire material comes off.

In the embodiment of the present invention, two or more protruding portions 4a are provided on one side of the resin frame 4 in the case of a square shape, and approximately 5 to 8 protruding portions in the case of a round shape. If two or three meshes of the wire mesh filter 3 are cast into the projection 4a, even if a force is applied to the center of the wire mesh filter 3, Since the force is larger than the casting size of the protruding part 4a, the wire does not come off immediately,
There is no problem in normal use.

Further, in the wire mesh filter 3 having the above structure, the wire constituting the wire mesh filter 3 does not come off from the resin frame 4 even if the size of the resin frame 4 is reduced. The part is deformed,
For this reason, in general, a pillar that is integrated with the resin frame 4 is cast to have strength. However, if the spacing between the pillars is made smaller, strength is not obtained, and the opening area is reduced by the amount of the pillar. is there.

The present invention is based on the reason that the distance between the columns is wide.
Normally, it does not stick out even in a wide opening where the appearance becomes very bad.
a is a flat portion formed by crushing the intersection of the wire rods by appropriately pressing the filter surface near the center of the opening of the wire mesh filter 3 and crushing the intersection of the wire rods. The crossing portion is made of a thin wire having no strength, so that even when a force is applied from the outside, the crossing portion does not shift in position and is hardly deformed tightly.

Since the flat portion 3a formed of the pressed portion is fixed at the intersection of the wires, the effect can be obtained in an arbitrary shape, and the wire mesh filter 3 has a round shape, a square shape, a diamond shape, a cross shape, and the like. By appropriately processing the above-mentioned shape, a design effect can be obtained while maintaining strength.

Reference numeral 5 denotes a screw for fixing the protection frame 4 portion of the wire mesh filter 3 to the frame body 1. In the case of the square wire mesh filter 3, the screw 5 is provided at four regular corners. 4b is a claw provided on the upper and lower sides or on the left and right sides of the resin frame 4 by utilizing the fact that the resin frame 4 can be curved together with the wire mesh filter 3.
The frame 1 is provided with a locking portion that fits with the pawl portion 4b.
And the number of screws 5 to be fixed can be reduced.

When the claw portion 4b provided on the resin frame 4 is set to be longer, it can be mounted simply by hooking it on the locking portion of the frame 1, and the screw 5 can be omitted, so that the wire mesh filter 3 can be easily attached and detached. It becomes something. Further, if the number of screws 5 can be reduced and the attachment / detachment of the wire mesh filter 3 becomes easy, when the accumulation of dust is large, the wire mesh filter 3 can be immediately removed and washed with water. The convection fan 2 can now be easily cleaned.

In particular, if a lot of dust and debris are floating due to a large number of babies and infants in the interior of the room in which they are used, or when they work in clothing-related jobs, the operation of the convection fan 2 causes the debris and dust to be reduced. Since it accumulates and accumulates on the mesh filter 3,
It is necessary to regularly remove the dust and dirt by suctioning the wire mesh filter 3 with a vacuum cleaner or wiping with a rag or the like to continue the normal operation. However, the structure of the present invention enables frequent cleaning. The durability is much better than that of the product left unattended with dust.

[0025]

The end face of the wire mesh filter 3 of the present invention is cast into the resin frame 4 over the entire circumference, and the sharp cut end of the wire mesh filter 3 is covered with the resin frame 4 to cover the skin of the hand or the like. Since the resin frame 4 serves as a skeleton of the wire mesh filter 3, it is hardly deformed and the detachable structure can be easily configured.

At this time, since the resin frame 4 is provided with a plurality of projections 4a facing the filter surface, even when the end of the wire mesh filter 3 is cast into the thin resin frame 4, the wire mesh filter is Since many of the meshes are also cast into the protruding portions 4 a, the wire rod of the wire mesh filter 3 does not come off from the resin frame 4. For this reason, many meshes are entirely formed in the resin frame 4.
Since the resin frame 4 does not need to be filled, the resin frame 4 can be configured to be thin, and the effective opening area can be widened.

Also, since the central portion of the wire mesh filter 3 is appropriately pressed, and the intersection of the wires is crushed, the wires at the intersection are less likely to move, and the wire mesh itself becomes distorted or sticky. The chilling phenomenon is gone. For this reason, although the conventional wire mesh filter 3 can form the fan cover even though it can form the fan cover, the wire mesh filter 3 can be used for both for the first time.

[Brief description of the drawings]

FIG. 1 is a rear view of a main part of a warm air heater showing an embodiment of the present invention.

FIG. 2 is an enlarged plan view of a component according to the present invention.

FIG. 3 is a sectional view of the component.

FIG. 4 is a cross-sectional view showing one of the conventional examples.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Convection fan 3 Wire mesh filter 3a Flat part 4 Resin frame 4a Projection

Claims (2)

(57) [Claims] 1. A convection fan 2 provided in a frame 1 and a convection fan 2 opposed to the heat source portion, and a wire mesh filter 3 having a fine mesh is provided on a suction side of the convection fan 2. The end face of the wire mesh filter 3 is cast into the resin frame 4 over the entire circumference, and the convection fan 2 sends the room air that has passed through the wire mesh filter 3 to the heat source portion, and exchanges the hot air obtained by heat exchange with the heat source portion. In a hot air heater with a filter that blows out from the front of the frame body 1 into the room, the casting size of the wire mesh filter 3 is set small to reduce the size of the resin frame 4 and the resin into which the wire mesh filter 3 is cast. A projecting portion 4a formed integrally with the resin frame 4 is provided from a plurality of portions of the frame 4 toward the inside with the filter surface, and the wire mesh filter 3 is cast into the resin frame 4 and the projecting portion 4a. Heater filter structure. 2. A flat portion 3a is formed on the filter surface at the center of the opening of the wire mesh filter 3 by pressing the shape of the wire appropriately to crush the intersection of the wires. Filter structure of wind heater.