JPH0247408Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is a hot-air heating system that can heat greenhouses etc. using waste materials or solid fuels such as waste shavings, firewood, and coke, which are cheap fuels. This relates to improvements to exchangers.

(b) Prior Art Conventionally, a combustion cylinder is provided in which solid fuel is supplied and stored inside from the supply port and burned in an outer cylinder that forms a solid fuel supply port, an air blowing port, and a hot air blowing port. A heat exchanger is installed to circulate and discharge the exhaust gas in the combustion cylinder, and the air sent from the air outlet by a heat exchange blower is circulated around the combustion cylinder and the heat exchanger, and the air is exchanged during this circulation. There is a hot air heat exchanger that is configured to convert hot air into hot air and blow the hot air into the room from a hot air outlet.

(c) Problems to be solved by the invention By the way, in this kind of hot air heat exchanger, if the peripheral wall of the outer cylinder is partially brought too close to the peripheral wall of the combustion cylinder, this part of the outer cylinder will be damaged. The distance between the two is kept approximately constant because abnormal overheating can easily cause cracking, but the farther the distance is, the less the thermal effect on the outer cylinder will be. However, it becomes difficult for air to circulate around the combustion tube, which shortens the life of the combustion tube and reduces heat exchange efficiency, which is a structural problem. It was hot. In contrast, at present, this problem remains unresolved and the spacing between the two is determined at a reasonable point, but on the other hand, it is possible to extend the life of the outer cylinder, combustion cylinder, etc., and at the same time improve heat exchange efficiency. The reality is that there is a strong desire for a hot air heat exchanger that can be improved.

(d) Means for solving the problem Therefore, this invention solves the above problem by implementing the following means.

That is, the solid fuel is supplied and housed inside from the supply port into the outer cylinder, which has a solid fuel supply port on the front wall, an air blow port on the rear wall, and a hot air blowout port at a suitable position on the front side circumferential wall. and a heat exchanger that extends rearward from the upper part of the rear wall of the combustion tube and is connected to the rear wall of the outer tube to circulate and discharge exhaust gas. and a hot air heat exchanger forming a heat exchange circulation chamber between the outer surface of the heat exchanger and the heat exchanger, in which large air conditioning tools are installed at approximately constant intervals along the outer periphery of the combustion tube to connect the combustion tube and the heat exchanger. The combustion tube is located near the combustion tube and is attached approximately concentrically with the combustion tube.

(e) Effect With the above configuration, the air sent into the heat exchange distribution chamber from the air outlet is guided to flow along the outer circumferential surface of the combustion tube when it reaches the air conditioning device. During this flow, heat is effectively exchanged and the air becomes warm air, which can then be blown out from the hot air outlet.

(F) Embodiments Hereinafter, specific embodiments of this invention will be described with reference to the drawings.

The hot air heat exchanger includes a combustion cylinder 1, a heat exchanger 2, an air conditioning tool 3, an outer cylinder 4, a heat exchange blower 5, and the like.

The combustion tube 1 has a cylindrical shape such as a circle, an oval circle, a square, a polygon, etc., with an opening 1a that is fully opened at the front. In a sealed manner along the inner peripheral edge of the solid fuel A supply port 6 formed in approximately the same opening as the opening 1a,
And it is fixed in a cantilevered manner.

The heat exchanger 2 has an exhaust gas flow passage 9 through which exhaust gas in the combustion cylinder 1 is circulated and discharged, and an arbitrary number of heat exchange through flow passages 10 that vertically penetrate the exhaust gas flow passage. It extends rearward from the upper part of the rear wall of the combustion tube 1 and is communicatively connected to the rear wall of the outer tube 4. Note that the exhaust gas flow path 9 includes an arbitrary number of exhaust gas holes 1b formed in the upper part of the rear wall of the combustion tube 1.
A heat exchange box 2a with a front opening is fixed in a sealed manner to this part so as to close it from the rear side, and the rear wall of this heat exchange box and the rear wall of the outer cylinder 4 are connected in communication with one flue pipe 2b. It is formed by On the other hand, the heat exchange through-flow passage 10 is arranged in parallel between the upper and lower walls of the heat exchange box 2a.
An arbitrary number of through pipes 2C... are connected in communication so as to pass through the exhaust gas flow path 9 therein, and each through pipe 2C...
It is formed inside.

The air straightening tool 3 is made of a so-called short tube that is large in the shape of a large tube at approximately constant intervals along the outer periphery of the combustion tube 1 and is short in the front-rear direction, and is concentric with the combustion tube 1 in the front-rear direction. It is installed near the connection between the combustion tube 1 and the heat exchanger 2. As a result, much of the air sent toward the rear wall of the combustion cylinder 1 from the air outlet 7 formed on the rear wall of the outer cylinder 4 is transferred to the air straightener 3.
The direction of the air is changed by the inner peripheral surface, and the air flows along the outer peripheral surface of the combustion tube 1 from the rear side to the front side.

In addition, in the illustrated example as a specific means for attaching the air conditioning tool 3, the inner peripheral surface is fixed to the outer surface side of a support member 11 made of an appropriate number (5) of rods. It is shown. Each support member 1
1... has each front end fixed to the front wall of the outer cylinder 4 so that the inner surface of the combustion cylinder 1 can be brought into contact with the outer circumferential surface of the combustion cylinder 1 along the front-rear direction and hold this combustion cylinder. The outer surface side of the rear end portion is fitted to the inner circumferential surface of a holding tube 13 fixed to a fixing member 12 on the rear wall of the outer cylinder 4 so as to be able to expand and contract in the front and rear directions. Holding tube 1 at this time
A tube 3 is shorter than the short tube used to form the wind straightener 3, and is arranged concentrically with the combustion tube 1.

The outer cylinder 4 accommodates the combustion cylinder 1, the heat exchanger 2, the air conditioning tool 3, etc., and has a double-walled structure in which a heat exchange circulation chamber 14 is formed between the inner surface of the outer cylinder and the outer surfaces of the combustion cylinder 1 and the heat exchanger 2. It consists of a structure that can be shaped into a structure, with a solid fuel A supply port 6 on the front wall and an air blowing port 7 on the lower part of the rear wall.
A hot air outlet 8 is formed at a suitable position on the front side peripheral wall. In the illustrated example, a cylindrical shape that is spaced apart from each other along the outer periphery of the air conditioning tool 3 and is longer than the combustion tube 1 in the front and back direction is placed concentrically with the combustion tube 1, the air conditioning device 3, and the holding tube 13. It shows what is in place.

In the illustrated example, the combustion cylinder 1 to which the heat exchanger 2 is integrally fixed to the outer cylinder 4, and each support member 11...
are welded on one side to the inner surface of the front wall of the outer cylinder, and as a support structure for each free end, the free end of the smoke pipe 2b of the heat exchanger 2 is slightly welded to the rear wall of the upper part of the air outlet 7 of the outer cylinder 4. A support structure in which each support member 11 is supported in a sealed manner by a heat-resistant sealing material 15 so as to be slidable back and forth, and the free end portion of each support member 11 is fitted into the holding tube 13 so as to be slidable back and forth to some extent as described above. is shown. As a result, the combustion tube 1 and the heat exchanger 2 integrated therewith, and each support member 11...
This means that it can absorb some expansion and contraction in the front-back direction due to the influence of heat, which is advantageous compared to those that are fixed entirely by welding.

The heat exchange blowing device 5 is installed behind the air blowing port 7, and can blow air by rotating an internal fan 5a in conjunction with a drive source as appropriate.

In the figure, 16 is an outer lid that can be opened and closed, 17 is an air intake adjustment means provided at the lower center of the outer lid 16 to adjust the intake amount of air necessary for combustion, and 18 is an outer cylinder 4.
19 is a base provided at the hot air outlet 8, and 20 is a chimney.

According to the above, when the outer cover 16 is opened and the solid fuel A
is supplied from the supply port 6 directly to the lower part of the combustion tube 1 or by placing a rostol (not shown) on top of it and ignited it to cause the combustion action of the solid fuel A. Then, the exhaust gas flows from the exhaust gas hole 1b... The gas enters the heat exchange box 2a, passes through the exhaust gas flow path 9, and is discharged from the chimney 18 to the outdoors. Meanwhile, during this time, heat exchange distribution room 1
4 becomes moderately warm, the heat exchange blower 5 is driven to blow air through the air outlet 6 into the heat exchange distribution chamber 14.
The air that is forcibly sent toward the rear wall of the heated combustion tube 1 inside, hits this rear wall, and undergoes heat exchange.The air is then redirected toward the inner circumferential surface of the air conditioning tool 3, and is transferred to the inner heat exchanger. After the air flowing on the second side undergoes heat exchange when flowing through the outer periphery of this heat exchanger and the heat exchange through-flow passage 10, when it reaches the inner peripheral surface of the air conditioning tool 3,
As a result of this, the air direction is changed again and it flows along the outer circumferential surface of the combustion tube 1, so that heat is exchanged effectively during this time and it becomes warm air, and this warm air flows from the hot air outlet 8 to the outside of the outer tube 4. This means that the air can be blown out to heat the room.

(g) Effects of the device In this device having the above configuration, air sent from the air outlet 7 on the rear wall of the outer cylinder 4 flows through the heat exchange distribution chamber 14, and the air flows through the front side peripheral wall of the outer cylinder 4 at an appropriate location. During the flow of hot air from the hot air outlet 8, the combustion tube 1
Since the air is circulated along the outer circumferential surface of the combustion tube 1 by the air conditioning tool 3 attached to the combustion tube 1, heat can be sufficiently transferred from the outer circumferential wall of the combustion tube 1 to this circulating air, which is different from the conventional air conditioning device without the air conditioning device. In comparison, heat exchange efficiency can be significantly improved, and as a result, effective heating can be achieved with less fuel. Also, this means that
Since overheating of the combustion tube 1, heat exchanger 2 and outer tube 4 is prevented, the lifespan of these can be extended, and
It is possible to design the outer cylinder 4 peripheral wall closer to the combustion cylinder 1 peripheral wall as a whole than in the conventional design, and the design can also be made more compact.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing a hot air heat exchanger implementing this invention, Fig. 2 is a sectional view taken along line X-X in Fig. 1, and Fig. 3 is a side sectional view showing the same hot air heat exchanger. FIG. Code, 1... Combustion cylinder, 2... Heat exchanger, 3...
Air conditioner, 4...outer cylinder, 6...supply port, 7...air blowing port, 8...hot air outlet, 14...heat exchange distribution chamber, A...solid fuel.

Claims (1)

[Scope of utility model registration request] The solid fuel A is supplied to the supply port 6 in the outer cylinder 4, which has a supply port 6 for the solid fuel A on the front wall, an air blowing port 7 on the rear wall, and a hot air blowing port 8 at a suitable position on the front side circumferential wall.
A heat exchanger 2 is installed which extends rearward from the upper part of the rear wall of the combustion cylinder 1 and is connected to the rear wall of the outer cylinder 4 to circulate and discharge exhaust gas. , a heat exchange circulation chamber 1 between the inner surface of the outer cylinder 4 and the outer surfaces of the combustion cylinder 1 and the heat exchanger 2;
In the hot air heat exchanger forming the combustion tube 1, large air conditioning tools 3 are installed at approximately constant intervals along the outer periphery of the combustion tube 1.
A hot air heat exchanger characterized in that a hot air heat exchanger is provided near a connecting portion between the combustion tube 1 and the heat exchanger 2, and substantially concentrically with the combustion tube 1.