JPS5824156Y2 - leaf tobacco dryer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a leaf tobacco dryer having a circulating air blowing structure.

Conventionally, this type of leaf tobacco dryer, such as those shown in "Tobacco Drying Method" published by Urayama Fishing Village Cultural Association, pages 167 to 243 and in Figures 3 and 4, has a hot air generating section inside a sealed box-shaped container a'. axial flow blower 4', heat source burner 10', furnace 1
A heater consisting of a heat exchanger 5' is installed, outside air inlets 1' are bored at appropriate locations on the outer wall, and a heat-resistant and flame-retardant heat insulating material (for example, compressed To prevent heat loss and dew condensation on the interior walls, the building was covered with aluminum foil pasted on a glass cotton board that had a certain degree of rigidity.

However, when the axial blower is operated at high speed to maintain a constant pressure inside the drying chamber, the blower generates noise.
In addition, the insulation material peels off when exposed to warm circulating air, making it impossible to use it for a long period of time, and preventing complete insulation.
There were defects such as.

Therefore, the present invention aims to prevent the generation of noise caused by the blower and at the same time prevent heat loss due to peeling of the heat insulating material.

The gist of the present invention to achieve the above objectives is to provide a hollow airtight outer cylinder with an outside air inlet at the bottom and a hot air generator inside, and a space between the inner wall surface of the outer cylinder. The hot air generating inner cylinder has an upper part communicating with the upper part of the circulation drying chamber and a lower part communicating with the lower part of the circulation drying chamber, and the hot air generating inner cylinder has a damper attached to the upper part. A leaf tobacco dryer comprising an inside air inlet, a blower for sucking outside air and recirculated air, and a heat exchanger installed in the blowing direction of the blower for exchanging heat by bringing the heat generated by a furnace into contact with outside air and recirculating air. It is something.

Therefore, the hot air generating inner cylinder is surrounded by the outer cylinder, and an inside air intake port is provided in the upper part of the inner cylinder, and an outside air intake port is provided in the lower part of the outer cylinder, so that the noise from the blower is canceled by the outer cylinder and is transmitted to the outside. There is no leakage, and thermal energy such as heat dissipation from the hot air generating inner cylinder to the outside, air leaking from the heated part due to the pressure of the blower, etc. does not leak to the outside due to the outer cylinder, and is transferred between the outer cylinder and the hot air generating inner cylinder. It is stored in the space between the cylinder and the cylinder.

Therefore, this thermal energy is recovered into the inner cylinder for generating hot air by the operation of the blower, so that no heat loss occurs.

An embodiment of the invention will be described below based on Figs. 1 and 2. In the figures, a indicates an outer cylinder, b indicates an inner cylinder for generating hot air, and the outer cylinder a is made of a metal plate or the like to form a closed rectangular cylinder. This outer cylinder a
is connected to one side wall of the drying chamber C, and an inner cylinder, which will be described later, is installed inside.

A in the figure is a space between the outer cylinder a and the inner cylinder.

Note that it is optional to attach a silencing compensator to the inner wall surface of the outer cylinder a.

The inner cylinder is formed into a cylindrical shape from a metal plate or the like, and the circulation duct 3 is connected to the upper part of the inner cylinder so that it communicates with the upper part of the drying chamber C, and the opening at the lower part communicates with the ventilation section 8 at the bottom of the drying chamber C. Eggplant.

Also, from the top to the bottom of this inner cylinder, there is an inside air intake port 2.
, an axial blower 4 and a heater 5 are installed in this order, and a rotary damper is attached to the inside air inlet 2 so as to be able to open and close freely.
The inner air intake port 2 is opened and closed by operating the operating rod 9 that protrudes from the outer wall of the outer cylinder a.

The heaters 10, 11.5 are composed of a burner 10, a furnace 11, and a heat exchanger 5. The heat exchanger 5 has a concave upper part, and the outside air sucked by the blower 4 is passed through the concave part. Air is blown inside to efficiently heat outside air, etc.

In this way, when the operating rod 9 is operated to open the inside air intake port 2, and the blower 4 is activated and the burner 10 is ignited, the outside air is sucked into the space A from the outside air intake ports 1, 1, and then the inside air is drawn into the space A. Inside air is sucked into the inner tube through the suction port 2 of the tube and heated by the heat exchanger 5 to become hot air.

Also, when the blower 4 is operated, the circulation duct 3 is filled with outside air.
The circulating air after drying in the upper part of the drying chamber C is sucked in and heated by the heat exchanger 5 in the same way as outside air to become hot air.

Therefore, hot air is circulated in the drying chamber C as shown by the arrow, thereby drying the leaf tobacco suspended within the chamber.

In addition, although the illustrated one has one inner tube in the outer tube a, it is also possible to arrange a large number of inner tubes in the outer tube, or the inner tube can be replaced with a square tube. Of course, it may be made into a shape, etc.

In the figure, 7 is an exhaust port.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a vertical side view, Fig. 2 is a perspective view with a part of the main part cut away, Fig. 3,
Figure 4 shows the conventional product, Figure 3 is its vertical side view, and Figure 4 shows the conventional product.
The figure is a longitudinal sectional front view of the same. In the figure, a is an outer cylinder, b is an inner cylinder for generating hot air, C is a drying chamber,
1 is an outside air intake port, and 2 is an inside air intake port.

Claims (1)

[Scope of utility model registration request] The outside air inlet is bored at the bottom, and the upper part is placed in the upper part of the circulation drying chamber, and the lower part is placed so that a space is created between the hollow sealed outer cylinder with a hot air generator installed inside and the inner wall surface of this outer cylinder. Consisting of hot air generating inner cylinders that communicate with each other at the bottom of the circulation drying chamber,
The hot air generating inner cylinder has an inside air inlet with a damper provided at the top thereof, a blower for sucking outside air and recirculated air, and a blower installed in the direction of air flow of the blower to bring the heat generated by the furnace into contact with the outside air and recirculated air. A leaf tobacco drying machine that consists of a heat exchanger that exchanges heat.