JP2002101770A - Temperature controller for vinyl house - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature controller for vinyl houses capable of optimally and automatically controlling the temperatures in a vinyl house depending on the growth of plants and using the previous setting when cultivating the same farm crop as before. SOLUTION: Light projectors 2a and 2b are arranged to be mutually facing by bringing the farm crop 4 cultivated in a vinyl house 3 between them and 8 photoelectric sensors 2 are arranged in the vertical direction in a predetermined interval. The height of the farm crop is measured by the photoelectric sensors 2 and the temperature in the vinyl house 3 is controlled to a set temperature which is previously set depending on the height of the farm crop 4.

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, a greenhouse temperature control device has a function of adjusting the temperature in a greenhouse in multiple stages according to time. For example, as shown in FIG. 3, this function is set to 35 degrees from 21:00 to 5:00, set to 33 degrees from 5:00 to 10:00, and set to 30 degrees from 10 to 15:00. From 15:00 to 21:00, the temperature is set to 33 degrees, and the temperature in the greenhouse is adjusted according to this setting.

[0003]

The temperature suitable for cultivation of a crop changes with growth. However, the conventional greenhouse temperature control device has no means for detecting the height of the crop.
Since there is no function of adjusting the temperature in accordance with the growth of the crop, the optimum temperature control for cultivating the crop could not be performed. Therefore, depending on the intuition of the farmer, the temperature was reset according to the growth of the crop. Further, since only one pattern can be set by time, if the reset is repeated, the initially set initial set temperature will be erased. Therefore, when the same crop is cultivated next time, there is a drawback that the previously set temperature cannot be used, and the setting is troublesome.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional greenhouse temperature control device, an object of the present invention is to automatically and optimally control the temperature in a greenhouse in accordance with the growth of crops. , To provide a greenhouse temperature control device that can use the previous setting when growing the same crop as the previous time, the method is a greenhouse temperature to keep the temperature inside the greenhouse at an appropriate temperature In the control device, the height of the crop cultivated in the greenhouse is measured by the measurement sensor, and the temperature in the greenhouse is automatically controlled according to the measurement result of the measurement sensor.

Another object is to control the temperature in the greenhouse by raising or lowering the initial setting temperature according to the height of the crop, based on the initially set initial setting temperature.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to a temperature control apparatus for a greenhouse according to the first aspect, in a temperature control apparatus for a greenhouse for keeping the temperature in a greenhouse at an appropriate temperature, a crop cultivated in the greenhouse. By measuring the height of the greenhouse with a measurement sensor and automatically controlling the temperature in the greenhouse according to the measurement result of the measurement sensor,
The temperature inside the greenhouse can be automatically and optimally controlled according to the growth of the crop.

According to the temperature control device for a greenhouse, the temperature in the greenhouse is controlled by raising and lowering the initial temperature in accordance with the growth of the crop, based on the initially set temperature. By doing so, the previous settings can be used when growing the same crop as the previous time, and the settings can be made easily.

[0008]

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 drawings of FIGS.

As shown in FIG. 1, a greenhouse temperature control device 1 includes a transmission type photoelectric sensor 2 having a light projector 2a and a light receiver 2b, and sandwiches a crop 4 cultivated in a greenhouse 3. The light emitter 2a and the light receiver 2b are arranged so as to face each other, and are arranged at predetermined intervals in the vertical direction.
The photoelectric sensors 2 are arranged side by side. When the crop 4 is not germinating, the photoelectric sensor 2 emits the light 2a and the light 2
All the photoelectric sensors 2 output a light receiving signal to the greenhouse temperature controller 1 because there is no light-shielding material between b and b.
Grows, light is shielded between the light projector 2a and the light receiver 2b, so that the photoelectric sensor 2 outputs a light-shielded signal.

Since the temperature of the crop 4 suitable for growth differs according to the growth, the temperature control device 1 for the greenhouse uses the crop 4
The temperature is changed in three stages of germination, growth and harvest according to the height of the rice. The germination period is set in advance as a case where a light receiving signal is output without outputting a light blocking signal from all eight photoelectric sensors 2 and a case where a light receiving signal is output from one photoelectric sensor 2. Is set when the light-shielding signal is output from two to six photoelectric sensors 2, and the harvest period is set when the light-shielding signal is output from seven to eight photoelectric sensors 2.

Since the temperature inside the greenhouse 3 changes under the influence of the outside air, the temperature is set according to time. For example, as shown in FIG. 2A, the angle is set to 35 degrees from 21:00 to 5:00, set to 33 degrees from 5:00 to 10:00, and set to 30 degrees from 10 to 15:00, It is set to 33 degrees from 15:00 to 21:00. This setting is set as the germination period.

On the basis of the setting of the germination period, a state in which the temperature is lower by 2 degrees than the setting of the germination period indicated by the broken line as shown in FIG. As shown in the figure, a state in which the temperature is lower by 4 degrees than the setting of the germination period indicated by the broken line is set as the harvesting period.

The greenhouse temperature controller 1 automatically controls the temperature inside the greenhouse 3 in accordance with the settings and optimally in accordance with the growth of the crop. Further, the temperature control device 1 for the greenhouse performs the temperature control in the growing period and the harvesting period based on the setting of the germination period.
Since the setting of the germination period is not erased even when cultivating, it is not necessary to make troublesome settings again.

Further, by converting the growth period and growth state of the crop and the temperature in the greenhouse into data, it can be used for the next cultivation.

In this embodiment, the number of photoelectric sensors is not limited, and various settings can be appropriately changed according to the crop to be cultivated.

In this embodiment, a photoelectric sensor is used as a measuring sensor for measuring the height of a crop, but a measuring sensor such as an ultrasonic sensor does not cause any problem.

[0017]

As described above, the greenhouse temperature controller according to the present invention is a greenhouse temperature controller for maintaining the temperature in a greenhouse at an appropriate temperature. The temperature inside the greenhouse can be optimally and automatically controlled in accordance with the growth of crops by measuring the temperature using a measurement sensor and automatically controlling the temperature inside the greenhouse according to the measurement result of the measurement sensor. There is an excellent effect.

According to the temperature control device for a greenhouse, the temperature in the greenhouse is controlled by raising and lowering the initial temperature in accordance with the growth of the crop, based on the initially set temperature. By doing so, the previous setting can be used when cultivating the same crop as the previous time, and there is an excellent effect that the setting can be easily performed.

[Brief description of the drawings]

FIG. 1 is a view showing a greenhouse in which a greenhouse temperature control device according to the present invention is installed.

FIG. 2 is a graph showing temperature control during the germination period, (b) during the growth period, and (c) during the harvest period in the greenhouse temperature control device according to the present invention.

FIG. 3 is a graph showing temperature control of a conventional greenhouse temperature controller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Greenhouse temperature control device 2 Photoelectric sensor 2a Projector 2b Receiver 3 Greenhouse 4 Crops

Claims (2)

[Claims] 1. A temperature control device for a greenhouse for keeping the temperature in a greenhouse at an appropriate temperature, wherein a height of a crop cultivated in the greenhouse is measured by a measurement sensor, and a measurement result of the measurement sensor is obtained. A temperature control device for a greenhouse, wherein the temperature in the greenhouse is automatically controlled in accordance with the temperature. 2. The vinyl according to claim 1, wherein the temperature in the greenhouse is controlled by raising and lowering the initial temperature according to the height of the crop, based on the initially set initial temperature. House temperature control device.