JPS609640Y2 - Wood-fueled heating furnace - Google Patents

Description

[Detailed description of the invention] This invention uses a blower to send wind through the spiral air passage in the combustion chamber and the heat exchange chamber, while gradually burning the wood and other fuels, thereby exchanging heat from the combustion chamber. This relates to a heating furnace using wood as fuel, which efficiently exchanges heat between the combustion gas flowing into the vessel and air, and continuously generates hot air suitable for heating over a long period of time.

Conventionally, devices that generate hot air using a heavy oil burner combustion chamber as a heat exchanger and use this hot air as a heat source for drying or heating are disclosed in Japanese Utility Model Application No. 52-86055 and Japanese Utility Model Application Publication No. 52-3735. In the former, the combustion furnace is formed of a stainless steel round double-shell heat exchanger 2, and a flue 3 having a chimney 4 at the end is connected in series to the rear of the furnace. Air is blown into the double shell in a perpendicular direction by a blower 5, and this air flows in a spiral manner between the guide plates 8 installed in a spiral shape, reaching the flue 3, which is provided in this part. The hot air is discharged from several hot air exhaust holes 9.

Therefore, the flow distance and time of the air to exchange heat with the combustion gas of heavy oil are greatly increased, making the heat exchange extremely effective. Since it is not possible to store wood etc. in the combustion chamber for combustion, and because the combustion chamber and flue are connected back and forth, the device is long and requires a lot of space to install. There are issues to be addressed.

In the latter case, a combustion chamber 4 is arranged in a hot air generation chamber 3 surrounded by an outer wall 2, a burner 5 is installed facing into the combustion chamber 4, and a certain amount of clearance is provided around the outer periphery of the combustion chamber 4. The front smoke chamber 6 and the rear smoke chamber 7 are arranged in an annular shape while maintaining the same, and are connected to each other by a large number of smoke pipes 8, 8... to communicate the combustion chamber 4 and the rear smoke chamber 7. Pipes 9, 9, .

Therefore, the large number of smoke pipes installed around the combustion chamber increases the heat transfer area, increases the heat exchange ability, and makes it more compact. It is a type of combustion equipment that cannot be used to store wood etc. in the combustion chamber for combustion, and the air sent to the blower travels straight around the combustion chamber and is discharged from the air outlet, reducing the heat exchange distance and The problem was that the time was short.

This invention was made to solve this problem.
The combustion chamber has a structure that can accommodate fuel such as wood, and by controlling natural ventilation and a controller, the wood is gradually and weakly burned, making it possible to generate a constant temperature for a long time. Another object of the present invention is to provide a heating furnace which has high thermal efficiency and does not take up much space for installing the device, by installing a combustion chamber surrounded by a spiral air supply path and a multi-tubular heat exchange chamber above and below.

Next, an example of the implementation of the device related to the present invention will be explained based on the drawings.

In the figure, reference numeral 1 is a combustion chamber that accommodates a fuel such as wood, which is formed into a double structure with a gap formed between an outer cylinder a and an inner cylinder, and a spiral piece 2 is installed in this gap. In addition to forming a spiral air supply path 3, a fire spout 5 with an opening/closing lid 4 is provided on the upper front part, and an air outlet/air intake 6 is provided at the bottom of the firing mouth 5, and this air intake 6 has an opening/closing lid. 7 is attached, a sliding plate 8 is attached to this opening/closing lid 7, and air intake holes 9, 9' are provided in this sliding plate 8 and opening/closing lid 7 at a pitch slightly larger than the hole diameter. The plate 8 is pushed and pulled by an electromagnetic solenoid or a damper motor 10, and the air intake holes 9 and 9' are aligned to allow air to be taken in, or to be misaligned to stop the air intake.

Reference numeral 11 denotes a hook attached to the sliding plate 8. When hooked into the hole 13 of the rod 12 in the electromagnetic solenoid 10, the sliding plate 8 is connected to the solenoid 10, but when removed from the hole 13 of the rod 12, the sliding plate 8 is connected to the solenoid 10. The moving plate 8 can be opened and closed together with the opening/closing lid 7.

Reference numeral 14 denotes a blower, which is attached to the outer cylinder a of the combustion chamber 1 so that its blower port 15 is in contact with the front end of the spiral air passage 3.

Reference numeral 16 denotes a heat exchange chamber installed above the combustion chamber 1, the rear end of which is communicated with the rear end of the spiral air passage 3 through an annular hole 17 surrounding a tube (to be described later), and inside thereof are collecting tubes arranged at both front and rear ends. In the drawing, a heat exchanger 18 connected by four smoke pipes e is arranged, a chimney 19 is connected to the upper part of the front collecting case C, and the rear collecting pipe d passes through the annular hole 17. A pipe 20 communicates with the rear end of the combustion chamber 1 .

f is the outer wall of the collecting tubes C and d, which can be opened and closed by hinges, and when the flue e becomes dirty, it is opened to clean the flue e.

Reference numeral 21 denotes an auxiliary ventilation hole provided in the outer cylinder a close to the annular hole 17, through which a part of the air passes when a large amount of air is supplied.

Reference numeral 22 denotes an air outlet provided at the front end of the heat exchange chamber 16, through which the generated hot air is sent through piping 23 to the chamber to be heated.

24 is a thermometer installed at the hot air outlet 22, which measures and displays the temperature of the hot air.

25 is a temperature controller attached to a box 26 located near the hot air outlet 22, and the temperature is detected by a temperature sensor 27 installed inside the hot air outlet 22, and the detected temperature is 0 to 10.
When the temperature rises above an arbitrary set value within 0°C, the electromagnetic solenoid 10 is activated to close the air intake holes 9 and 9', and the combustion chamber 1 is closed.
However, when the temperature drops below the set value, the electromagnetic solenoid 10 is operated in reverse, the intake ports 9 and 9' are opened, and the air supply is stopped, adjusting the combustion condition and maintaining a constant temperature at all times. Automatic control is performed to generate warm air.

One embodiment of the device according to the present invention is constructed as described above, so that after a kindling is put into the combustion chamber 1 and ignited, waste wood that no longer produces shiitake mushrooms is put in as fuel, and the wood is combusted. When starting, put a certain amount of fuel into the fuel chamber 1, close the firing port 5 with the lid 4, the fuel will be weakly combusted by the natural supply of air from the pressurized air intake port 6, and the combustion gas will be released. enters the rear collecting pipe C from the rear end of the combustion chamber 1 through the pipe 20,
After branching from the collecting pipe C to a plurality of smoke pipes e, the flow collects in the collecting pipe d and is discharged from the chimney 19 to the outside. When air is blown to the front end of the air passage 3, the air is guided by the spiral piece 2 and moves forward while swirling around the combustion chamber 1.
When the air reaches the rear end of the air passage 3, it flows into the heat exchange chamber 16 through the annular hole 17, flows forward around the heat exchanger 18, and reaches the hot air outlet 22. During this time, the cold air is Combustion chamber 1
Since the air is heated by exchanging heat with the combustion gas inside the heat exchanger 18, when it reaches the outlet 22, it becomes warm air suitable for heating a greenhouse, etc., and flows from the outlet 22 to the pipe 23. It is then sent to the place of use.

In this case, in patents featuring wood, the combustion state changes from strong to weak and the temperature of the generated hot air is likely to change, so the temperature detector 27 detects the temperature of the generated hot air, and this temperature is controlled in advance. When the heating temperature rises higher than the appropriate heating temperature set in the controller 25, the controller 25 closes the electromagnetic solenoid 10, pulls the sliding plate 8 to shift the air intake ports 9 and 9', and supplies combustion air. In order to stop the heating, the combustion of the fuel is weakened and the temperature rise of the generated hot air is suppressed.Also, when the temperature of the hot air becomes lower than the optimum temperature for heating, the controller 25 activates the electromagnetic solenoid 1.
0, push the sliding plate 8 and open the air intake ports 9, 9'.
This system automatically controls the hot air temperature to the appropriate temperature for heating by sending combustion air to strengthen the combustion of the fuel, suppressing the temperature rise of the generated hot air, and automatically controlling the temperature of the hot air to the appropriate temperature for heating. It can be stably supplied over a long period of time.

As mentioned above, the device according to the present invention stores fuel such as wood in the combustion chamber and naturally supplies air from the waist pressure outlet and air intake port, and the fuel is gradually burned slowly and hot air is produced for a long period of time. In this case, when the combustion state changes and the temperature of the hot air generated changes, the temperature controller acts and adjusts the combustion by adjusting the amount of natural air supply, increasing the temperature of the hot air. Since the temperature of S is kept constant, a suitable heating furnace using solder wood as fuel can be obtained. Moreover, the spiral piece is installed in the gap formed between the inner cylinder and the outer cylinder in the combustion chamber. By installing a spiral air supply path, a blower is attached to the front end, and the rear end is connected to a heat exchange chamber provided above the combustion chamber, and the rear end is connected to the combustion chamber. Since it is equipped with a smoke tube type heat exchanger with a chimney connected to the front end, the air sent to the blower circulates around the combustion chamber many times through the spiral air passage. It enters the heat exchange chamber, flows forward in the heat exchange chamber while coming into contact with the smoke tube-shaped heat exchanger, and reaches the outlet, and the flow distance and flow time are increased by more than twice that of conventional methods. Because the heat exchange between the combustion gas and the air in the combustion chamber and heat exchanger is extremely effective, the exhaust gas to the chimney is at a low temperature without causing any danger, and the temperature of the hot air obtained is high and sufficient. It has a heating capacity, and the combustion gas is discharged into the chimney after passing through the smoke tube heat exchanger in an oxygen-free state, so even if sparks are mixed in, they will quickly disappear, and there is a risk of a fire due to scattering. This makes it extremely practical as an economical and safe heating furnace.

[Brief explanation of drawings]

The drawing shows one embodiment of the device according to the present invention.
The figure is a longitudinal side view. Figure 2 is a partially longitudinal front view. FIG. 3 is a front view showing the air outlet/air intake and its operating members, and FIG. 4 is a longitudinal sectional side view of a conventional heating furnace. FIG. 5 is a vertical sectional front view. In addition, 1 in the figure is the combustion chamber,
a is an outer cylinder, b is an inner cylinder, 2 is a spiral piece, 3 is a spiral air supply path, 5 is a fire opening, 6 is an outlet/air intake port, 16 is a heat exchange chamber,
18 is a heat exchanger, C and d are collecting cases, e is a smoke pipe, 19 is a chimney, 22 is a hot air outlet, and 25 is a temperature controller.

Claims (1)

[Scope of utility model registration request] A combustion chamber is provided with a combustion opening and a pressure/air intake port in the front part, and a combustion chamber for accommodating the combustion of wood and other materials inside, and has a double structure in which a gap is formed between an outer cylinder and an inner cylinder. A spiral air passage is formed by attaching a spiral piece in the air gap, a blower is attached to the front end of the air passage, and the rear end is communicated with the rear end of the heat exchange chamber installed above the combustion chamber. Inside the exchange chamber, a heat exchanger is installed in which the collecting cases at both ends are joined by multiple smoke pipes, the rear collecting case is communicated with the combustion chamber, the chimney is connected to the front collecting case, and the front end of the heat exchanger chamber is connected to the combustion chamber. A hot air outlet is provided in the hot air outlet, temperature changes of the hot air sent out are detected near the hot air outlet, and the temperature of the hot air sent out is kept as constant as possible by adjusting the degree of opening of the extrusion/air intake port. A heating furnace using wood as fuel, characterized in that it is equipped with a temperature controller.