JPS6291717A - Burner control unit in grain drier - Google Patents

Abstract

PURPOSE:To make it possible to carry out a drying control with a high accuracy at each control portion by providing a required number of drying portions each of which is provided with a burner and a burner controller. CONSTITUTION:Each drying portion 1 is provided with burner 2 and a burner controller 3, and a main control panel 4 and the burner controller 3 are connected to each other by means of a data communication line 5. The burner controller 3 of each drying portion 1 is provided with a combustion control function based on the ignition control of the burner 2 and the temperature of a hot airflow. The main control panel 4 is provided with functions such as starting, stopping and hot air temperature setting. After entering into an operational state based on the instruction from the main control panel 4, the action control is performed at each drying part. Therefore, the accuracy of drying control of the hot air temperature and the like is greatly improved as the entire grain drier.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a burner control device in a grain dryer for drying grain with hot air.

Conventional technology Conventionally, grain dryers that dry grain by ventilation of hot air are
For example, as described in Japanese Patent Publication No. 48-36753, it is widely known and is in practical use.

Problems to be Solved by the Invention The conventional grain dryer described above has a drying capacity (grain t that can be dried).
) was constructed as an independent structure (・rokara), and there were many models with different drying capacities.

However, in large-scale grain dryers, if drying units with unit drying capacity are used in series, the structure can be simplified and functionally diverse products can be easily obtained.

In view of these circumstances, the present invention has been developed to easily configure the required drying capacity by the number of drying sections each equipped with a burner and its burner controller. It is an object of the present invention to provide a burner control device for a grain dryer that allows high drying control.

Means for Solving the Problems The present invention has the following technical means for achieving the object.

That is, the burner control device for a grain dryer according to the present invention configures a grain dryer by providing a drying section equipped with a burner that generates hot air for ventilation drying grains and a burner controller thereof, and The present invention is characterized in that a main control panel is provided for controlling the burner controller of the drying section provided with the required stand.

Each drying section equipped with a burner and its burner controller has a fixed drying capacity, so by providing one or the required number of drying sections, the drying capacity can be increased based on the drying capacity of one unit. A series of grain dryers are composed. Since each drying section is equipped with a burner controller that controls only its burner, the operation of each drying section is controlled for each drying section after it enters the operating state according to a command from the main control panel. For this reason, the accuracy of drying control such as hot air temperature is greatly improved for the grain dryer as a whole.

Example An embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numerals 1, 1, . 4 is a main control panel, and the burner controllers 3 of each drying section 1 are connected by a data communication line 5.

The burner controller 3 of each drying section 1 has a combustion control function based on the ignition control of each burner 2 and hot air temperature, etc. It has the following functions.

The grain M dryer is configured with one or the required number of drying sections 1 depending on its drying capacity (amount of grain that can be dried).
・Ru. Therefore, each drying section 1 has a drying capacity of the smallest unit of the drying capacity series.

FIG. 2 illustrates the structure of the burner controller 3 of each drying section 1 and its related devices.

In FIG. 2, 6 is a grain moisture sensor, 7 is a flame sensor that detects the combustion flame of the hot air generator, 8 is a hot air temperature sensor, and 9 is a heat J! 1d, all 1d ignition circuits, 10 its fuel supply pump, 11 its blower, 12 its rotation sensor, these are connected to the burner controller 3. In this burner controller 3, 13,
14.15 is an amplifier, 16 is an AD converter, 1γ is an input port, 18 is an arithmetic processing unit, 19 is an output port, 20
is a rotation control circuit for the blower 11. The arithmetic processing unit 18 includes a CPU (central processing unit) 21 and a ROM (memory circuit).
22 and RAM (memory circuit) 23.

Note that if outside air temperature is to be added to the control element, a sensor and related circuits are provided.

Each control content is programmed into the ROM 22 of the arithmetic processing section 18. In other words, 1 In addition to normal automatic drying control, for example, after igniting the hot air generator, stabilization control reduces the amount of fuel supplied and the amount of air blown to stabilize combustion (for example, reduces the amount of fuel and air blown to 33% to stabilize the combustion time) 5 minutes], automatic re-ignition command when abnormal extinguishment occurs in the hot air generator during drying, shortening of combustion stabilization time after re-ignition (for example, shortening combustion stabilization time to 40 seconds) ),
This includes control of commands to stop operation in the event that re-ignition is not possible.

The RAM 23 temporarily stores detection data from the moisture sensor 6, flame sensor T, and hot air temperature sensor 8.
The control content is determined by the CPU 21 based on these various detection data and the program in the ROM 22.

In the structure configured as described above, the burners 2 of all the drying sections 1 constituting the grain dryer are activated and activated by a command signal sent to the all burner controllers 3 via the main control panel 4 or the data communication line 5. The main control panel 4 also sends control data such as hot air temperature to the burner controller 3. Therefore, even if the grain dryer is composed of a plurality of drying sections 1, starting, stopping, and drying control conditions are all centrally managed by the main control panel 4.

However, since the combustion control based on the hot air temperature in each drying section 1 is performed separately by each burner controller 3, the drying control such as the hot air temperature in each drying section 1 is performed accurately, and the grain dryer as a whole has extremely high precision. High drying control is possible.

Note that each drying section 1 and the main control panel 4 are connected by a data communication line 5, so that each drying section 1 and the main control panel 4. Moreover, even if the distance between each drying section 1 is large, no problem arises in terms of management. Control data is exchanged between the main control panel 4 and each drying section 1. For example, a start signal is sent from the main control panel 4 to the first drying section 1, and a start confirmation signal is sent from the drying section 1 to the main control panel. This is a pattern in which all the drying units 1 are sequentially activated by repeating sending the activation signal to the next drying unit 1 when the drying unit 4 is returned.

Effects of the Invention Since the present invention is configured and operates as described above, it is possible to easily configure a desired drying capacity by changing the number of drying sections each equipped with a burner and a burner controller. Moreover, it is possible to perform highly accurate drying control for each drying section.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a block diagram of a grain dryer, and FIG. 2 is a block diagram of a burner controller and related devices.

Claims (3)

[Claims] (1) A grain dryer is constructed by providing a drying section equipped with a burner that generates hot air for ventilation drying grains and a burner controller thereof, and a burner controller of the drying section provided with the necessary stand. A burner control device for a grain dryer, characterized by having a main control panel for controlling the burner. (2) The burner controller in each drying section has functions such as ignition control of each burner and combustion control based on hot air temperature, etc., and the main control panel has functions such as starting and stopping all burners and setting hot air temperature. 2. A burner control device for a grain dryer according to claim 1, comprising: a burner control device for a grain dryer according to claim 1; (3) A burner control device for a grain dryer according to claim 1 or 2, characterized in that the burner controller of each drying section and the main control panel are connected via a data communication line.