JPS6238086Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a solid fuel (coke, coal)-fired heater for use in large-scale horticultural greenhouses.

Traditionally, solid fuels such as coke and coal have lower combustion efficiency than liquid and gaseous fuels such as oil and gas.
Also, because it cannot be burned continuously for long periods of time, it has not been used as a heat source for heaters in large-scale horticultural greenhouses. Therefore, the inventor of the present invention has solved the above-mentioned problems of solid fuel with the invention related to Japanese Patent Application No. 55-63560, and has made it possible to use solid fuel as a heat source for heating large-scale greenhouses for horticulture.

Another object of the present invention is to completely and reliably control the temperature inside the greenhouse, thereby improving the quality and yield of cultivated crops. In other words, the solid fuel-fired space heater has the great advantage of storing the required load of solid fuel (e.g. coke) at one time and burning it in a fixed quantity, but the optimum conditions for the amount of stored coal must be set depending on the weather and the equipment of the gardening house. However, there were some difficulties due to various conditions such as the type of crop cultivation and temperature control.

To put this in concrete terms, the amount of stored coal is set according to conditions such as weather, season (time), and the temperature at which the cultivated crops are controlled, and coke fuel is input. It is fine if they match, but if the amount of coke input is insufficient, the controlled temperature inside the greenhouse cannot be maintained, which will eventually affect the quality and yield of cultivated crops, causing problems in horticultural cultivation. .

Furthermore, since the outside air temperature is variable, it is difficult to set the optimal amount of stored coal. If too much coke is stored, fuel will be wasted, and although it would be possible to scrape out the coke again, this operation is troublesome and is not suitable for women and girls.

This invention was devised in view of such circumstances, and its basic configuration is that the lower abdomen of the coal storage/combustion chamber is
A secondary combustion chamber is arranged laterally through a flame conduit, and an auxiliary combustion burner is inserted in the side wall of the secondary combustion chamber facing the flame conduit, facing toward the flame conduit. The inside of the house is maintained at a predetermined controlled temperature by supplementing the lack of heat due to the combustion of solid fuel using an auxiliary combustion burner.

Hereinafter, an embodiment of the present invention will be described based on the drawings. In the figure, a indicates a coal storage/combustion chamber, and b indicates a secondary combustion chamber connected to the lower abdomen of the coal storage/combustion chamber a via a flame conduit d. , a heat exchanger 1 is installed in the secondary combustion chamber b.
0, smoke exhaust pipes 11 are successively installed, and the above coal storage and combustion chamber a, flame conduit d, secondary combustion chamber b, and heat exchanger 10
A part of the smoke exhaust pipe 11 is disposed inside the oblong box-shaped fuselage A, and the heat generated from the secondary combustion chamber b and the heat exchanger 10 is transferred to the blower 12 mounted on the upper part of the fuselage A.
As a result, heat is exchanged with the outside air sucked into the heating section B, and the hot air is turned into hot air and discharged into the house through the discharge port 13.

Incidentally, the discharge port of the smoke exhaust pipe 11 is projected from the outside of the machine body to the outside of the house (not shown), so that the smoke is discharged to the outside of the house. The above coal storage/combustion chamber a is also used as a coal storage chamber for coke 30, which is a solid fuel, and the coke 30 is introduced through an input port provided at the upper part of the chamber that can be opened and closed freely, and the coke 30 is fed into the coal storage/combustion chamber a provided below the grate 15 at the lower part. The primary combustion air is supplied from the primary combustion air inlet 14, and is ignited by the ignition burner 16 disposed facing the grate 15. Coke 30 with the required heat load is added. In addition, a cooling air flow passage 17 communicating with the heating section B is provided at the upper outer periphery of the coal storage/combustion chamber a to prevent overheating. is equipped with a blower 18 for blowing cooling air, and is further provided with a secondary combustion air heating passage 19 along the lower outer circumferential wall of the coal storage/combustion chamber a, with the passage 19 protruding outside the fuselage. A secondary combustion air inlet 20 with a damper for sucking outside air is provided, and the secondary combustion air is sucked into the heating channel 19 from the air inlet 20, and the flame conduit d
From the secondary combustion air supply port 21 around the discharge port,
It is supplied into the secondary combustion chamber b.

The amount of combustion in the coal storage/combustion chamber a is adjusted by a suction blower 22 (variable) disposed in the smoke exhaust pipe 11, and this suction blower 22 is operated according to a predetermined controlled temperature inside the house. . 23 in the figure is a controller, and this controller 23 controls the blower 18,
23 and the auxiliary combustion burner c are activated and stopped to maintain the temperature inside the house at the controlled temperature. The secondary combustion chamber b has a flame conduit d on one side thereof.
An auxiliary combustion burner c is arranged on the side wall _b1 facing the flame conduit d, facing the direction of the flame conduit d.
This auxiliary combustion burner c uses oil or gas as a heat source, and
As shown in the figure, it may be arranged below the center of the secondary combustion chamber b for U-shaped combustion, or as shown in Fig. 2, it may be arranged at the center for reverse combustion. Any structure is acceptable.

The above-mentioned auxiliary combustion burner c performs the above-mentioned control when the predetermined amount of coke 30 introduced into the coal storage/combustion chamber a does not have enough heat in the house and the temperature inside the house drops (such as when the outside temperature drops more than expected). The fire is automatically ignited by the container 23 to heat the inside of the house and maintain it at a controlled temperature. Therefore, this auxiliary combustion burner c is activated after the combustion of the coke 30 in the coal storage/combustion chamber a is completed, or when the amount of heat is insufficient in the combustion of the coke 30 during combustion.

As described above, in the present invention, when the predetermined amount of solid fuel charged into the coal storage/combustion chamber is insufficient in calorific value, this deficiency can be supplemented by igniting the auxiliary combustion burner. Therefore, since the greenhouse can be maintained at a predetermined controlled temperature, it is possible to prevent the quality and yield of cultivated crops from decreasing due to a drop in temperature. Moreover, since the auxiliary combustion burner is inserted into the side of the secondary combustion chamber facing the flame conduit, the flame from the auxiliary combustion chamber forms an inverted U-shape inside the secondary combustion chamber, resulting in good heat exchange. The burner is also less likely to be damaged by the thermal power generated by the combustion of solid fuel.

Moreover, since the secondary combustion chamber serves as a furnace for the auxiliary combustion burner, and there is no need to provide a separate furnace, the structure is simple and can be provided at low cost.

Furthermore, when the heating season becomes relatively warm and the heating machine is not in operation for many days, it is possible to use only the auxiliary combustion burner in an emergency when it is necessary to heat the house in a short period of time due to a sudden change in temperature during the night. It's very convenient to drive.

[Brief explanation of the drawing]

FIGS. 1 and 2 are longitudinal sectional views showing an embodiment of the present invention. In the figure, a is a coal storage/combustion chamber, b is a secondary combustion chamber, and c
indicate burners for auxiliary combustion.

Claims (1)

[Scope of utility model registration request] A secondary combustion chamber is connected horizontally to the lower abdomen of the coal storage/combustion chamber via a flame conduit, and an auxiliary combustion burner is inserted in the side wall of the secondary combustion chamber facing the flame conduit, facing toward the flame conduit. A solid fuel-fired heating machine for a gardening house, which is characterized by the fact that it is equipped with the following functions: