JPH0136054Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention allows the flame to be drawn into the blower while being dispersed almost evenly on both sides, even when the blower is installed in front of the burner. The present invention relates to a hot air generating device that can easily generate hot air with substantially uniform temperature distribution on both left and right sides, thereby uniformly drying grains filled in a plurality of rows of drying passages.

(Prior art) Conventionally, in a grain dryer that dries the grains flowing vertically by directing hot air horizontally to the grains flowing vertically in the dryer body, A hot air generating device is provided, and the hot air generating device has a burner with a hollow flare tube attached to the tip side on the intake side of the hot air generating body with both ends open, and As a configuration in which a blower is installed on each discharge side,
It is known that hot air at an appropriate temperature was generated by continuously sucking the combustion flame emitted from a burner into a blower.
It is publicly known as described in Japanese Patent No. 36753.

(Problem to be solved by the invention) By the way, like the above-mentioned known hot air generator,
When simply attaching a hollow flare tube to the tip of the burner, the combustion flame of the burner is continuously blown toward the blower from the entire circumference of the hollow flame tube, and the blower rotates in one direction. After the outside air is taken in from the intake side, it is blown towards the discharge side, so the air flow inside the hot air generation cylinder is directed from the intake side to the discharge side and flows in the same direction as the rotation direction of the blower. This causes the phenomenon of being forced to turn towards the target.

Therefore, due to the occurrence of the above phenomenon, the combustion flames that are continuously ejected from the entire circumference of the hollow flame tube are not evenly spread around the surrounding area but are not evenly sucked into the entire blower, but are shifted to one side along the air flow. As a result, the temperature of the hot air on the side that sucks in a lot of combustion flames is high, and conversely, the side that sucks in no combustion flames becomes cold air, resulting in an almost even temperature distribution on both the left and right sides. Since it is not possible to uniformly blow hot air from the discharge side, when used as a hot air generator for a grain dryer equipped with multiple rows of drying passages, there is a problem that drying cannot be achieved evenly. occured.

Therefore, the present invention provides an advantage that even when the blower is installed in the hot air generating cylinder, for example, the blower is located on the front side of a burner with a hollow flame tube attached to the tip side, the hollow flame tube can be used. Resistance plates are installed on both the left and right sides of the hot air generation cylinder located between the blowers to distribute the combustion flame ejected from the hollow flame tube almost evenly on the left and right sides. By providing a hot air generator capable of continuously generating hot air with substantially uniform temperature distribution on both the left and right sides by uniformly inhaling the respective combustion flames dispersed in the left and right sides of the blower. This solves the above problem.

(Means for Solving the Problem) Therefore, the technical problem of the present invention is to distribute the combustion flame ejected from the hollow flame tube approximately evenly on the left and right sides, and to prevent the combustion flames distributed in each direction from being biased to one side. To easily generate hot air with a more even temperature distribution on both the left and right sides by allowing the air to be drawn into a blower in a uniform state on both the left and right sides.

In order to solve this technical problem, we specifically designed the burner to have a hot air generating cylinder with both ends open on the intake side, a hollow flame tube attached to the tip side, and a blower on the discharge side in front of the burner. The hot air generating device is characterized in that resistive plates are disposed between the hollow flame tube and the blower and on both left and right sides of the hot air generating cylinder.

(Operation) The technical means of the present invention operates as follows (see figure).

That is, when the blower 4 is started and rotated now, the air is sucked into the hot air generation cylinder 2 from the intake side a by the suction action of the blower 4, and then is blown from the discharge side b by the pressure-feeding action of the blower 4. run Therefore, if the burner 3 is operated under the above-mentioned outside air circulation condition and the combustion flame is blown from the hollow flame tube 7 toward the blower 4, the combustion flame is sucked into the blower 4 along with the circulating air flow. After that, the mixture is stirred and mixed, and hot air at an appropriate temperature is blown from the discharge side b.

By the way, in the combustion state mentioned above,
Resistance plates 9, 9 are installed oppositely on both left and right sides of the hot air generation cylinder 2, located between the blower 4 and the hollow flame-discharging tube 7 that spreads the combustion flame toward the surroundings. When the air flow A is generated in the hot air generating cylinder 2 by the rotation of the cylinder 2, the back side B of the left and right resistance plates 9 and 9 becomes almost negative pressure. The combustion flame that was about to be lit was the hot air generator 2.
The air is divided into approximately equal halves on both the left and right sides of the air blower 4, and is sucked into the left and right sides of the blower 4, respectively.

Therefore, as mentioned above, the combustion flames divided into left and right halves are continuously drawn into both the left and right sides of the blower 4, so that the hot air blown from the discharge side b has an even temperature distribution on the left and right sides. Even when grain drying work is performed by branching hot air into two rows of drying passages, it is possible to uniformly dry the grains with hot air at a uniform temperature.

(Embodiment) A preferred embodiment of the present invention will be described with reference to the accompanying drawings.

In the drawings, reference numeral 1 denotes a hot air generator capable of efficiently blowing hot air whose temperature on both left and right sides is approximately equal from the discharge example;
A horizontal cylindrical hot air generating cylinder 2 with both ends open, a rotary type burner 3 that causes live combustion while sprinkling fuel into fine particles with a rotating plate, and a structure in which the inside of the hot air generating cylinder 2 is moved from the intake side a to the discharge side b. The burner 3 is arranged so as to be centrally located on the intake side a of the hot air generation cylinder 2 via a suitable mounting bracket 5, Further, the blower 4 is disposed on the discharge side b of the hot air generation cylinder 2, which is the front side of the burner 3, and a fixed rectifying blade body 6 on which the blower 4 is rotatably mounted is mounted on the back side of the blower 4. It is permanently installed. A hollow flame-discharging cylinder 7, which is shaped like a rubber band, is removably attached to the tip side of the burner 3 disposed on the intake side a of the hot-air generation cylinder 2, and the combustion flame of the burner 3 is directed toward the blower 4. The flames are erupted in a diffused manner.

Incidentally, resistive plates 9, 9 are provided oppositely on both left and right sides of the hot air generating cylinder 2, located between the above-described hollow flame tube 7 and the blower 4. As shown in FIGS. 1 and 2, the resistance plates 9, 9 are provided perpendicularly to the direction of movement of the air flow A, and the rotation of the blower 4 causes the air flow I to flow inside the hot air generation cylinder 2. When the wind is raised, there is a slight negative pressure on the back side of the resistance plates 9, 9, so the combustion flame that is trying to be ejected in a diffused manner from the entire circumference of the hollow flame tube 7 is attracted and guided in the direction of the resistance plates 9, 9. As a result, the combustion flame is divided into approximately equal left and right halves, and the combustion flame is continuously emitted from both the left and right sides of the hollow flame cylinder 7 in a concentrated state.
Therefore, the two flames ejected from the left and right sides of the hollow flame tube 7 are continuously drawn into the left and right sides of the blower 4, so that the air is blown toward the discharge side b via the fixed rectifier blades 6. The hot air temperature can be made to be substantially equal on both the left and right sides.

Therefore, after dividing the hot air obtained by the hot air generator 1 into two, each hot air is blown into two drying passages in a branched manner, and the grains flowing vertically are individually exposed to the grains for drying. However, by blowing hot air with approximately uniform temperature distribution into each drying passage,
Grain can be dried under the same conditions. FIG. 3 shows another embodiment of the present invention.
It has a structure in which arc-shaped resistance plates 9', 9' are disposed adjacent to the open end of the hollow flame cylinder 7 on both the left and right sides when viewed from the front. In this example, the resistance plates 9', 9' are integrally connected to the hollow flame 7 in a state substantially parallel to the traveling direction of the air flow A generated by the rotation of the blower 4. A part of the air flow A is caused to flow toward the center of the flame outlet of the hollow flame tube 7 through the gaps 10, 10 formed on both the upper and lower sides due to the presence of the resistance plates 9', 9'. The combustion flame that is about to be ejected in a diffused manner from the entire circumference of the blower 7 is divided into approximately equal halves on the left and right by the upper and lower gaps 10, 10, and is inhaled into both the left and right sides of the blower 4, respectively. . 8 in the figure is the peripheral wall of the hollow flame cylinder 7.

(Effects of the invention) In short, since the present invention has the above-mentioned means, for example, a burner 3 having a hollow flame-discharging tube 7 in the shape of a flap attached to the tip side is installed on the intake side a of the hot-air generation cylinder 2 with both ends open. Also, even if the blower 4 is installed on the discharge side in front of the burner 3 to obtain hot air by stirring and mixing the combustion flame and the air flow,
When the air flow A is generated in the air generation cylinder 2 by the rotation of the blower 4, the combustion flames that are about to be ejected from the entire circumference of the hollow flame tube 7 toward the surroundings are generated by the resistance plates 9, 9. It is possible to divide the hollow flame cylinder 7 into two halves so that the left and right sides are approximately equal, and to emit flames evenly and intensively from both the left and right sides of the hollow flame tube 7.
Since the combustion flame can be accurately divided into two halves, each combustion flame can be sucked into the left and right sides of the blower 4, and the hot air can be efficiently blown with substantially even temperature distribution on both the left and right sides. play.

[Brief explanation of the drawing]

The drawings show an embodiment of the hot air generator according to the present invention, in which Fig. 1 is a cross-sectional plan view with main parts cut away, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. The figure is a cross-sectional plan view of essential parts showing another embodiment, and FIG. 4 is a sectional view taken along the line B--B in FIG. 3. 1...Hot air generator, 2...Hot air generator, 3...
...Burner, 4...Blower, 7...Hollow flame tube, 9
...Resistance plate, a...Intake side, b...Discharge side.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A burner with a hollow flare tube attached to the tip side is installed on the intake side of the hot air generation cylinder with both ends open, and a blower is installed on the discharge side of the front of the burner. What is claimed is: 1. A hot air generating device, characterized in that resistance plates are disposed between the hollow flame tube and the blower and on both left and right sides of the hot air generating cylinder. (2) The hot air generator according to claim 1 of the utility model registration, characterized in that the resistance plate is disposed so as to be substantially perpendicular to the traveling direction of the air flow generated by the rotation of the blower. . (3) The hot air generator according to claim 1, wherein the resistance plate is disposed so as to be substantially parallel to the traveling direction of the air flow generated by the rotation of the blower.