JP2002095363A - Temperature controller for plastic greenhouse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature controller for plastic green houses enabling temperature control with a small number of wirings for each of the plural plastic greenhouses at one place. SOLUTION: The temperature controllers 1 for plastic greenhouses is constituted with an operation unit 2 placed in a management room 4 and controlling units 3 placed in each of the plastic greenhouses 5. The operation unit 2 comprises an operation element 9 for inputting set temperatures, a display element 10 for performing various displays, a judging element 8 for judging whether a driving apparatus 7 is driven or stopped and a communication element 11 for sending or receiving data against the controlling unit 3. The controlling unit 3 comprises a communicating unit 12 for sending and receiving data against the operation unit 2, a controlling element 13 for controlling the driving apparatus 7 according to the judgments by a judgment element 8 of the operation unit 2, and an output-input element 15 for outputting the controlling signals from the controlling element 13 to the driving apparatus 7 and imputing alarm signals to the controlling element 13. The transmission path between the operation unit 2 and the controlling unit 3 is wired by a double line multidrop method, and data are sent and received by a center polling method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a greenhouse temperature control device for maintaining the temperature in a greenhouse at an appropriate temperature.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, a greenhouse temperature control device 21 is set in advance to a temperature measured in a greenhouse 22 measured by a temperature sensor 23 installed in the greenhouse 22. A determination unit 2 which compares the set temperature with a set temperature to determine whether to drive or stop a driving device 24 such as a ventilation fan, a heater, and a motor for opening and closing a ventilation window installed in the greenhouse 22.
5, a control unit 26 that outputs a control signal based on the determination by the determination unit 25, and outputs a control signal from the control unit 26 to the drive unit 24 or an alarm signal from a device 27 installed in the greenhouse 22. An input / output unit 28 to which is input
An operating unit 29 for inputting the set temperature and directly operating the drive unit 24 and a display unit 30 for displaying the set temperature, the measured temperature, the drive state of the drive unit 24, and the like are provided. Greenhouse temperature controller 2
One was installed.

[0003] As shown in FIG. 3, a greenhouse temperature control device 41 includes a temperature sensor 43 installed in a greenhouse 42 and a temperature measured in the greenhouse 42 and a preset temperature. And a driving device 4 such as a motor for opening and closing a ventilation fan, a heater, and a ventilation window installed in the greenhouse 42.
Determining unit 45 for determining whether to drive or stop the motor 4
And a control unit 46 that outputs a control signal based on the determination by the determination unit 45. The control unit 46 outputs a control signal from the control unit 46 to the driving device 44, and outputs a warning signal from a device 47 installed in the greenhouse 42. An input / output unit 48 to be input, an operation unit 49 for inputting a set temperature and directly operating the drive unit 44, and a display unit 50 for displaying a set temperature, a measured temperature, a drive state of the drive unit 44, and the like. Then, a greenhouse temperature control device 41 is installed in one greenhouse 42, and a driving device 44 is mounted on another plurality of greenhouses 42.
There is a method in which only a plurality of the greenhouse temperature control devices 41 are installed and the electric wires 51 are wired from the input / output unit 48 of the greenhouse temperature control device 41 to the plurality of greenhouse 42 drive devices 44 to simultaneously control the plurality of drive devices 44.

There is also a method of individually managing all greenhouses in one place such as a management room. This is because, as shown in FIG. 4, the greenhouse temperature controller 61 compares the measured temperature in the greenhouse 62 measured by the temperature sensor 63 installed in the greenhouse 62 with a preset set temperature. A determination unit 65 for determining whether to drive or stop a driving device 64 such as a ventilation fan, a heater, and a motor for opening and closing a ventilation window installed in the greenhouse 62, and a determination by the determination unit 65 A control unit 66 for outputting a control signal according to
An input / output unit 68 for outputting a control signal from the controller 64 to the drive unit 64 and receiving an alarm signal from a device 67 installed in the greenhouse 62, and for inputting a set temperature and controlling the drive unit 64
And a display unit 70 for displaying a set temperature, a measured temperature, a driving state of the driving device 64, and the like.
A plurality of greenhouse temperature controllers 6 in the same quantity as 2
1, a temperature sensor 63, a driving device 64, and a device 67 installed in each greenhouse 62 were connected to the respective greenhouse temperature control devices 61 by electric wires 72.

[0005]

However, in recent years,
Agricultural facilities have become larger, and often have dozens of greenhouses or greenhouses several kilometers away.
Since the greenhouse temperature control device 21 shown in FIG. 1 is installed in each greenhouse 22, it has to be moved to each greenhouse 22 for setting, which is troublesome.

A greenhouse temperature controller 41 shown in FIG. 3 controls a plurality of greenhouse drive units 44 by a control unit 46 of the greenhouse temperature controller 41 installed at one location. The settings for controlling these driving devices 44 were all the same.
For this reason, there have been problems such as a delicate temperature setting for each greenhouse 42 cannot be performed and a crop having a different temperature suitable for cultivation cannot be cultivated. Also, for example,
When the driving device 44 is a motor for opening and closing the ventilation window, assuming that the ventilation windows are provided on both left and right sides of the greenhouse 42, the driving device 44
If two electric wires 51 are required to drive one drive device 44, a total of four wires from the greenhouse 42 in which the greenhouse temperature control device 41 is installed to each greenhouse 42 are provided. In this case, there is a problem that the number of the electric wires 51 increases as the driving device 44 increases.

The greenhouse temperature control device 61 shown in FIG. 4 can individually control the greenhouse 62. However, the greenhouse temperature control device 61 installed in the control room 71 can control each greenhouse. Many wires 72 must be routed over long distances up to 62.
For example, the greenhouse temperature controller 61 uses two electric wires 72 to receive data from the temperature sensor 63.
And two wires 72 to drive the driving device 64 and two wires 72 to receive signals from the equipment 67, and a total of at least six wires 72 are transferred from the control room 71 to each vinyl. It must be wired to the house 62, and furthermore, as the number of the temperature sensors 63, the driving devices 64 and the devices 67 and the number of the greenhouses 62 increase, the electric wires 72
However, there was a problem that the number of pieces increased.

[0008]

SUMMARY OF THE INVENTION In view of the above problems of the conventional greenhouse temperature control device, an object of the present invention is to control the temperature of each of a plurality of greenhouses at one place with a small number of wires. A method of providing a greenhouse temperature control device, in which a method compares a temperature in a greenhouse measured by a temperature sensor with a preset temperature, and outputs a control signal from a control unit based on the comparison result. In the greenhouse temperature control device that controls the driving device, a control unit with a control unit is installed in each greenhouse, and the control unit operates a plurality of control units by an operation unit installed at one place via communication means It is to be.

Further, the transmission path between the control unit and the operation unit is a two-wire multi-drop system, and the communication means is a center polling system.

[0010]

According to the temperature control device for a greenhouse, the temperature in the greenhouse measured by the temperature sensor is compared with a preset temperature, and the control unit is operated based on the comparison result. A control unit equipped with a control unit is installed in each greenhouse, and the control unit is installed in one place via communication means. By operating a plurality of control units, the temperature of each of a plurality of greenhouses can be adjusted at one place with a small number of wires.

According to the temperature control device for a greenhouse according to the second aspect, the transmission path between the control unit and the operation unit is of a two-wire multi-drop type, and the communication means is of a center polling type. Wiring between operation units can be easily performed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a greenhouse temperature control device according to the present invention will be described with reference to the accompanying drawing of FIG.

The greenhouse temperature controller 1 comprises an operation unit 2 and a plurality of control units 3. The operation unit 2 is installed at one place such as a management room 4, and the control unit 3 is connected to each greenhouse 5. is set up.

The operation unit 2 compares a measured temperature measured by a temperature sensor 6 installed in each greenhouse 5 with a preset set temperature, and controls a ventilation fan, a heater and a heater installed in the greenhouse 5. A determination unit 8 for determining whether to drive or stop a driving device 7 such as a motor for opening and closing a ventilation window; an operation unit 9 for inputting a set temperature and directly operating the driving device 7; A display unit 10 for displaying a set temperature and a measured temperature of the house 5 and a driving state of the driving device 7; a communication unit 11 for transmitting and receiving data to and from the control unit 4 installed in each vinyl house 5 by a center polling method; Consists of

The control unit 3 includes a communication unit 12 for transmitting and receiving data to and from the operation unit 2, a control unit 13 for controlling the driving device 7 based on data of the determination unit 8 input via the communication unit 12, An input / output unit 15 outputs a control signal from the unit 13 to the driving device 7 and receives an alarm signal from a device 14 installed in the greenhouse 5. The operation unit 2 and the control unit 3 are controlled by a center polling method.
When an alarm signal is input to the control unit 13 from the control unit 4, the control unit 13
Outputs a control signal to stop the driving device 7,
Is transmitted from the control unit 13 to the communication unit 11 of the operation unit 2 via the communication unit 12, and the display unit 1 is stopped.
0 is displayed.

The temperature measured by the temperature sensor 6 is input to the input / output unit 15 of the control unit 3 and transmitted from the communication unit 12 to the operation unit 2 via the control unit 13. A transmission path between the communication unit 11 of the operation unit 2 and the communication units 12 of the plurality of control units 3 is wired in a two-wire multi-drop manner by a communication line 16 such as an optical fiber, an electric wire, a telephone line, or the like. Is being transmitted and received. Therefore, the number of the communication lines 16 may be two, and the wiring is easy.

The judging section 8 of the operation unit 2 transmits data to the control unit 4 when the measured temperature is out of the set temperature range, and controls the driving device 7 to keep the inside of the greenhouse 5 at an appropriate temperature. .

Since the set temperature is set for each control unit 4 of each greenhouse 5, and the plurality of control units 3 are individually controlled by the operation unit 2, the drive unit 7 of the first greenhouse 5 is provided with a ventilation fan. The driving device 7 of the second greenhouse 5 may be a heater, and
There is no limitation on the driving device 7.

In this embodiment, the transmission path between the communication unit 11 of the operation unit and the communication unit 12 of the control unit 3 is wired by the communication line 16. The communication unit 12 may be changed to use a telephone line for the transmission path. By using a telephone line, by using the control room 4 and each greenhouse 5
Can be easily wired even if they are several kilometers apart. Alternatively, the transmission path may be wireless, and data may be transmitted and received by radio waves. Thus, remote control can be performed without requiring wiring between the control unit and the operation unit. As described above, the communication means is not limited, and can be appropriately changed without departing from the gist of the present invention.

[0020]

As described above, the temperature control device for a greenhouse according to the present invention compares the temperature in the greenhouse measured by the temperature sensor with the preset temperature, and controls the control unit based on the comparison result. In a greenhouse temperature control device that outputs a signal to control a driving device, a control unit having a control unit is installed in each greenhouse, and a plurality of control units are operated by an operation unit installed at one place via communication means. By operating this control unit, there is an excellent effect that the temperature of each of a plurality of greenhouses can be adjusted at one place with a small number of wires.

Further, since the transmission path between the control unit and the operation unit is of a two-wire multi-drop type and the communication means is of a center polling type, there is an effect that wiring between the control unit and the operation unit can be easily performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a greenhouse temperature control device according to the present invention.

FIG. 2 is a block diagram showing a first conventional greenhouse temperature control device.

FIG. 3 is a block diagram showing a second conventional greenhouse temperature controller.

FIG. 4 is a block diagram showing a third conventional greenhouse temperature controller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Greenhouse temperature control device 2 Operation unit 3 Control unit 4 Management room 5 Greenhouse 7 Drive device 8 Judgment part 9 Operation part 10 Display part 11 Communication part 12 Communication part 13 Control part 15 Input / output part

Claims (2)

[Claims] 1. A greenhouse temperature control device for comparing a temperature in a greenhouse measured by a temperature sensor with a preset temperature and outputting a control signal from a control unit based on the comparison result to control a driving device. In the greenhouse, a control unit provided with the control unit is installed in each greenhouse, and the control unit operates the plurality of control units by an operation unit installed at one place via communication means. For temperature control device. 2. A temperature control device for a greenhouse, wherein a transmission line between the control unit and the operation unit is a two-wire multi-drop system, and the communication means is a center polling system.