JPS6019557Y2 - Room temperature control device in greenhouse - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a temperature control device for controlling the conditions of a greenhouse equipped with a geothermal heat exchange type heating device, a ventilation fan, and a heater.

This type of greenhouse described above is configured as shown in Figure 1, for example, and the growing environment (mainly refers to the temperature environment) for the crops to be cultivated is usually maintained by a controlled room temperature control device as shown in Figure 2. are doing.

The conventional room temperature control device shown in FIG. 2 consists of a first control system 101 that controls a geothermal heat exchange type heating device 1, and a second control system 102 that controls a heater 2 and a ventilation fan 3, respectively. Both control systems are connected via relay 103, and heater 2
During the operation, the first control system 101 does not operate.

This control device uses a geothermal heat exchange type heating device 1 and a heater 2.
The latter is controlled almost independently of the former, and the latter takes precedence over the former.

Therefore, the room temperature control is mainly performed by the heater 2 and the ventilation fan 3, and the geothermal heat exchange type heating device 1 only plays an auxiliary role, and the power of the geothermal heat exchange type heating device 1 is wasted. It's a win.

Furthermore, as a result of relying on the heater 2, maintenance costs are also relatively high.

In addition, in FIG. 2, reference numeral 104 is a first thermoswitch which is the main part of the first control system 101, and when the room temperature of the greenhouse H exceeds the maximum optimum temperature for crops (for example, 25° C.), ONL, When the room temperature drops below that temperature, it turns off, and when the room temperature falls below the minimum optimum temperature for crops (for example, 13°C), it turns on again. It is a switch that turns ON when the room temperature drops to, for example, 16°C or less.

In addition, 106, 107, and 108 are thermoswitches that are connected to a time switch 109 that supplies power at different times, as well as the second thermoswitch 105, so that the set temperature of the second thermoswitch 105 changes over time. It is configured so that it can be changed depending on the obi,
Furthermore, 110 is a second control system 10 that operates the ventilation fan 3.
This is a thermoswitch, which is one of the main components of 2.

The present invention aims to eliminate the above-mentioned conventional inconveniences by providing a room temperature control device for a greenhouse that can accurately manage the temperature environment of the greenhouse through rational operation of each equipment. It is.

Next, the configuration of the present invention will be specifically explained based on an embodiment shown in the drawings.

A room temperature control device in a greenhouse as an application example of the present invention is as follows:
It is configured as shown in Fig. 3, and targets the room temperature of the greenhouse H by controlling the equipment such as the underground heat exchange type heating device 1, the ventilation fan 3, and the heater 2 in the greenhouse H shown in Fig. 1. This is to control the value (appropriate state).

This room temperature control device includes a temperature control system 4 that controls a geothermal heat exchange fan IA of a geothermal heat exchange type heating device 1, a ventilation fan 3, and a heater 2, and an alarm circuit 6 having an alarm (buzzer, etc.) 5. It is made by combining.

The temperature control system 4 includes a first thermoswitch 7 connected to the underground heat exchange fan IA and the ventilation fan 3, and a thermoswitch' individually connected to the heater 2 and the underground heat exchange fan 1A. The main body is R″48.

The first thermoswitch 7 is connected to the alternating current 9 via a power switch 10, a first changeover switch 11, and a second changeover switch 12, and is connected to the alternating current 9 when the room temperature of the greenhouse H exceeds a set value. The heat exchanger fan 1A is energized, and when the room temperature further rises, the underground heat exchanger fan IA and the ventilation fan 3 are energized to operate in two ways with a temperature difference.

The thermoswitch group 8 is arranged in parallel and consists of one thermoswitch connected to the time switch 13, and in this embodiment, a second thermoswitch 14, a third thermoswitch 15, and a fourth thermoswitch. It is composed of four switches: a switch 16 and a fifth thermoswitch 17.

Each of these second to fifth thermoswitches 14 to 17 is
The time switch 13 that supplies power by changing the time zone
The set temperature can be changed depending on the time of day by setting the temperature of each thermoswitch 14-17, and each thermoswitch 14-17 is connected to the underground heat exchanger fan IA and the heater 2 and is connected to.

Then, if the room temperature becomes lower than the set temperature in each specified time period, the underground heat exchange fan IA is energized, and if the room temperature falls further, the underground heat exchange fan IA is energized.
Along with A, the heater 2 is also energized to operate the heater 2 as well.

Time switch 1 that supplies power to thermo switch group 8
3 is connected to an AC power source 9 via a power switch 10, a first changeover switch 11, and a second changeover switch 12, and is connected in parallel with the first thermoswitch 7.

The first changeover switch 11 has a two-circuit configuration as shown in the figure, and the second changeover switch 12 connected to the secondary side of this switch can switch to automatic control operation, manual heating operation, and heat storage ventilation operation. It has a three-circuit configuration as shown in the figure.

Further, the power switch 10 also has a two-circuit configuration, one of which is incorporated into the alarm circuit 6.

The alarm circuit 6 includes a DC power supply 18, and two thermoswitches 19, 20, 6th and 7th, which are connected in parallel, and an alarm 5.
and has.

The normally open contact 21A of the relay 21 provided in the temperature control system 4 is installed in parallel with the two thermoswitches 19 and 20, and is coupled to the temperature control system 4.

The sixth thermoswitch 19 of the alarm circuit 6 is for energizing the alarm 5 to notify that the room temperature in the greenhouse H has risen too much and will have an adverse effect on the crops, and the seventh thermoswitch 20 is for This is to notify by energizing the alarm 5 that the room temperature in the greenhouse H has fallen too much and the crops are being adversely affected.

The first to seventh thermoswitches of the temperature control system 4 and alarm circuit 6 are connected to a single thermistor that detects the room temperature of the greenhouse, and the temperature can be set arbitrarily and individually using each volume resistor. It is something.

In the room temperature control device configured as described above, for example, according to the temperature setting example shown in FIG. The fan IA is activated, the solar heat stored in the ground is radiated indoors, and the heating operation of the underground heat exchange type heating device 1 is carried out.

Then, for example, if the room temperature is even lower, 15° C. or less, the heater 2 is activated and the rise in the room temperature is measured.

Also, during the daytime (for example, from 8 o'clock to 1 p.m.), the underground heat exchange fan IA is activated by the first thermoswitch 7 at a room temperature of 25° C. or higher, and the underground heat exchange fan IA is operated underground in the underground heat exchange type heating device 1. The heat storage in the room is measured, and at the same time, the cooling inside the room is measured.

If the room temperature is 28℃ or higher, it is not possible to cool the room quickly by storing heat underground.
The ventilation fan 3 is immediately activated, and as the air in the room is replaced, the fall in the room temperature is measured.

Further, when the weather is bad and there is no sunlight, the underground heat exchange IA is activated when the room temperature is 14° C. or lower, and the heater 2 is also activated when the room temperature is 13° C. or lower.

In the evening (for example, from 15B-e to 18Pr), the underground heat exchange fan IA is operated when the room temperature is 17'C or lower, and the heater 2 is also operated when the room temperature is 16C or lower.

Therefore, at night (for example, from 1:00 to 6:00), when the room temperature is below 13°C, the underground heat exchange fan IA operates to provide heating, and when the room temperature is below 12"C, the heater 2 also performs heating. This is how it is done.

Therefore, the temperature state in the greenhouse H can be controlled within the set temperature range by operating the capabilities of each facility as necessary, and can be managed with the minimum necessary maintenance costs.

Furthermore, when the temperature exceeds the upper limit that is considered dangerous for crops, the alarm circuit 6 is activated by the sixth thermoswitch 19, and the alarm 5 notifies the user of this.

Similarly, regarding the lower temperature limit, the seventh thermoswitch 20 causes the alarm 5 to issue a notification.

Even if the temperature control system 4 becomes uncontrollable due to a power outage, the relay 21 installed in the temperature control system 4 is de-energized, so the normally open contact 21A of the alarm circuit 6 closes and the power alarm 5 is activated. It turns out.

The alarm circuit 6 can be reset with the power switch 10, and by switching the first changeover switch 11 and the second changeover switch 12, power can be applied to all thermoswitches as shown in FIG. Alternatively, it is possible to supply power only to those forming the thermoswitch group 8, or even only to the first thermoswitch 7. It is possible to switch between controlled operation, manual heater operation, and heat storage ventilation operation as needed.

In other words, the room temperature can be appropriately managed by cooperatively controlling the geothermal heat exchange type heating system, ventilation fan, and heater.

As is clear from the above description of the embodiments, the present invention includes a thermoswitch that operates a geothermal heat exchange type heating device and a ventilation fan with a temperature difference, and a thermoswitch that operates a heating device with a temperature difference. It is equipped with a thermoswitch that operates a geothermal heat exchange type heating system.The former thermoswitch stores heat in the ground and lowers the room temperature, and the latter thermoswitch releases heat from the ground and turns on the heater. This is a room temperature control device for greenhouses that measures the rise in room temperature due to each operation, so despite its simple configuration, it can rationally control room temperature by operating greenhouse equipment according to their capabilities. In addition, the geothermal heat exchange type heating system can be operated even during the daytime, and the dependence on the heater can be reduced accordingly.

Therefore, the temperature environment of the greenhouse can be appropriately managed by reducing fuel consumption by the heater.

Furthermore, since the alarm circuit is activated when the temperature exceeds the permissible limit, the difficulty in managing the room temperature can be solved.

In other words, it is possible to realize delicate and accurate greenhouse temperature control.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the configuration of a greenhouse where the room temperature control device works, Fig. 2 is a circuit diagram showing the structure of a conventional room temperature control device, and Fig. 3 is a room temperature control example as an application example of the present invention. FIG. 4, a circuit diagram showing the configuration of the device, is an explanatory diagram showing an example of temperature setting of the room temperature control device shown in FIG. 3. Note that the same reference numerals in the figures indicate the same or equivalent parts. 1...Ground heat exchange type heating device, IA...
...Ground heat exchange fan, 2...Heater, 3...
...Ventilation fan, 4...Temperature control system, 5...
...Alarm, 6...Alarm circuit, 7...
・First thermoswitch, thermoswitch group, 10...power switch, 11...
Changeover switch (first), 12... Changeover switch (second), 13... song time switch, 14... second thermo switch, 15... third Thermo switch, 18.19...Thermo switch, 2
1... Relay, 21A... Normally open contact,
H...Greenhouse.

Claims (3)

[Scope of utility model registration request] (1) In a greenhouse equipped with a geothermal heat exchange type heating system, a ventilation fan, and a heater that uses electricity, oil, or gas as a heat source, if the room temperature of the greenhouse rises above the set value, A thermoswitch that operates a geothermal heat exchange fan, which is the main body of a heat exchange type heating device, and also operates the ventilation fan together with the geothermal heat exchange fan when the room temperature rises further than the temperature at the time the fan is activated. is connected in parallel with this thermoswitch, and operates the underground heat exchange fan when the room temperature drops below a set value, and when the room temperature falls further than the temperature at the time the underground heat exchange fan is activated. A room temperature control device for a greenhouse, comprising: a thermoswitch that operates a heater together with the fan; and an alarm circuit that operates when the room temperature rises or falls beyond an allowable limit. (2) The feature is that multiple thermoswitches are installed in parallel to start the underground heat exchange fan and the heater, and each thermoswitch is connected to a time switch that supplies power at different times. A room temperature control device for a greenhouse according to claim 1 of the utility model registration claim. (3) A room temperature control device for a greenhouse according to claim 1 or 2, wherein the alarm circuit has an independent power supply and is configured so that the alarm circuit is closed by a relay contact in the event of a power outage.