JPH0328261Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a hot air heater that is equipped with a blower for forced convection of hot air on the back side and a burner for burning gas or oil inside. .

Conventional technology Conventional hot air heaters have a convection blower that creates forced convection of hot air on the back of the main unit and a burner inside the main unit, and heat generated by combustion of gas, oil, etc. inside the main unit is transferred to the front of the main unit. The hot air is blown out from the open hot air outlet to heat the room by forced convection, but the air flow path is made up of a convection blower, which draws air from a filter on the back of the convection blower, and a burner is mounted on the convection air flow path. The combustion air passes through a removable internal filter in the burner stand where the burner is placed, and is separated into the combustion air that leads to the burner.When the combustion air passes through the filter, it is further removed from dust and used for combustion, and together with the convection air, it generates warm air. Blows out the hot air forward from the outlet.

Problems that the invention aims to solve: In the conventional structure, combustion air only flows through the internal filter to the burner, so if the internal filter is used in a dusty environment, the internal filter will quickly become clogged and combustion will be interrupted. It causes problems and is not easy to use.

Means for Solving the Problems In order to solve the above-mentioned drawbacks, the present invention provides an opening in the side of the air duct that guides the air from the convection blower to the hot air outlet, in addition to the combustion air passage leading to the burner via the inner filter. The wind from this opening can be used as combustion air.

Effect With this configuration, even in a dusty situation, even if the combustion air through the inner filter decreases due to clogging of the inner filter before cleaning, the side surface of the ventilation duct can be cleaned. Combustion can be continued by the air flowing through the opening, reducing the possibility of unnecessary shutdowns.

Example Embodiments of the present invention will be described below with reference to the drawings.

The configuration of the embodiment is as shown in the figure, 1 is the main body, 2
is removably attached to the back of the main body 1 using a convection blower. Filter 3 for convection blower 2
is installed. A burner 4 has a flame hole 5, and the flame hole 5 is formed of a wire mesh. The burner 4 is attached to a burner mounting table 6 inside the main body 1. The burner mounting table 6 has a combustion air flow path 7, and this flow path 7 is provided with an inner filter 8. A hot air outlet 9 is formed on the front surface of the main body 1. The coarseness of the mesh of the filter 3 is coarser than that of the wire mesh of the flame hole 5, and the coarseness of the inner filter 8 is finer than that of the above-mentioned filter 3, and is equal to or close to the mesh of the wire mesh of the flame hole 5. It is something to do. The inner filter 8 can be cleaned by attaching and detaching the convection blower 2.

On the other hand, a convection blower 2 is installed on the top of the burner mounting table 6.
A blower duct 10 is provided to guide the air to the hot air outlet 9, and an opening 11 is provided in the side wall of the blower duct 10 to serve as a bypass passage for combustion air when the inner filter 8 is clogged.

The operation of this embodiment having the above configuration will be explained.

Indoor air is passed through a filter 3 to a convection blower 2
The air is drawn into the main body 1, where it is divided into convection air and combustion air. Combustion air is supplied to the burner 4 through the inner filter 8, mixed with fuel gas supplied through a separate path (not shown), and combusted in the flame hole 5 to generate combustion heat, and It mixes with the convection air to become warm air, and is blown out into the air from the hot air outlet 9 as warm air. At this time, the coarseness of the mesh of the filter 3 is coarser than the wire mesh of the flame hole 5, and the coarseness of the inner filter 8 is equal to or close to that of the wire mesh of the flame hole 5, so that most of the air for convection is The dust is removed by filter 3. However, since the small particles passing through the filter 3 are removed by the inner filter 8, the wire mesh in the flame hole 5 of the burner 4 is hardly clogged. Dust accumulated in the inner filter 8 is cleaned by removing the convection blower 2 from the main body 1.

On the other hand, an opening 11 provided in the side wall of the ventilation duct 10
Wind from the convection blower 2 also flows into the burner 4 through the outside of the blower duct 10 as combustion air.
It is now available to supply. At this time, the position and opening area are such that it is easier to flow in through the inner filter 8 than through the side wall opening 11 of the blower duct 10. As a result, combustion air is normally supplied to the burner 4 via the inner filter 8.

In this configuration, for example, when the inner filter 8 becomes clogged quickly under dusty usage conditions, the flow resistance increases as the inner filter 8 becomes clogged, and the side wall opening 11 of the air duct 10 The air flowing through the combustion chamber replenishes the air necessary for combustion. By cleaning the inner filter 8 regularly, the inner filter 8 will be returned to its original state without clogging due to adhesion of dust, etc., and the clogging of the flame hole 5 of the burner 4 will hardly progress. do not.

Effects of the Invention As described above, the present invention includes a wire mesh for the flame hole, a combustion air flow path provided in the filter on the back side of the convection blower and the burner mounting table, and an inner filter provided in this flow path. The mesh of the filter is coarser than the wire mesh of the flame hole, the inner filter has a mesh finer than that of the filter, and the mesh of the inner filter is equal to or close to that of the wire mesh of the flame hole. Cleaning is possible by attaching and detaching the convection blower, which removes dirt from the convection air using a filter, removes dirt that cannot be removed by the filter using the inner filter, and releases warm air free of dirt from the hot air outlet. It can blow out and create healthier warm air, and it hardly clogs the burner flame hole, maintaining durability and combustion efficiency.In addition, the inner filter can be cleaned by attaching and detaching the convection blower. Since the inner filter can be easily cleaned, it can withstand long-term use. Furthermore, by providing an opening on the side of the ventilation duct, it can be used in dusty conditions and when the inner filter becomes clogged quickly. When the inner filter becomes clogged, the flow resistance increases, and the air flowing in through the opening replenishes the air necessary for combustion, allowing combustion to continue, and preventing unnecessarily stopping operation. This has the effect of improving surface area, quality, and ease of handling.

[Brief explanation of the drawing]

The figure is a schematic sectional view of a hot air heater showing an embodiment of the present invention. 1...Body, 2...Blower, 3...Filter,
4... Burner, 5... Flame hole, 7... Distribution path, 8...
...Inner filter, 9...Hot air outlet, 10...Blower duct, 11...Opening.

Claims (1)

[Scope of utility model registration request] In a hot air heater that includes a convection blower that performs forced convection of hot air on the back of the main body and a burner inside the main body, the flame hole 5 of the burner 4 is constructed of a wire mesh, and the convection blower 2 is equipped with a filter 3. The mesh of the filter 3 is made coarser than the wire mesh of the flame hole 5, and the flow path 7 of the combustion air from the convection blower 2 to the burner 4 is formed inside the main body 1, and the flow path 7 is provided with a mesh of the flame hole 5 finer than the mesh of the filter 3. An inner filter 8 with a mesh size equivalent to or close to that of a wire mesh is provided, and an opening 11 that serves as a bypass passage to compensate for the lack of combustion air due to clogging of the filter 8 is used to convert the air from the convection blower 2 into hot air. A warm air heater characterized by being provided on the side of a blower duct 10 leading to an outlet 9.