JPH0524965Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a soil temperature control device that can obtain moisture for watering and watering at a temperature approximately equal to the soil temperature for successful plant growth experiments. .

(Prior art) Plants grow while absorbing water and nutrients from the soil through their roots, and it is necessary to adjust the soil temperature, which is an environmental condition that promotes or inhibits growth, to suit each plant. It is necessary to adjust and control the condition.

Therefore, conventionally, as a device to adjust and control soil temperature for plant growth experiments, a pot filled with soil is placed in a constant temperature water tank controlled to a desired temperature by a water temperature controller, and the soil temperature is adjusted to the desired temperature by a water temperature controller. Soil temperature control devices that generate heat are often used. Even in such a soil temperature control device, the water for irrigation or sprinkling is controlled without any particular temperature control.
Water was supplied directly from the tap water pipes.

(Problem that the invention aims to solve) However, with this method, the temperature of the water supplied for irrigation or sprinkling depends on the temperature of the tap water piping, so the temperature of the soil that receives water is the soil temperature control. Even though the temperature is adjusted to a predetermined level by the device, the temperature of the water supplied from the tap water pipe fluctuates significantly. In particular, when water is supplied through tap water pipes that are exposed to sunlight in a greenhouse, the water supply temperature will be higher than the soil temperature, and conversely, when water is supplied through tap water pipes that are cooled in a cold area in the shade. Water supply temperature becomes lower than soil temperature. Furthermore, even when water is supplied from underground piping that runs underground where the temperature is stable, if there is a large temperature difference between the water supply temperature and the soil temperature, the soil temperature, which is temperature regulated, may have to be supplied at a significantly different temperature. This caused a problem in that the plants were severely disturbed and had a negative impact on plant growth experiments.

The present invention was devised in view of the above problems, and aims to provide a soil temperature regulating device that can supply water for irrigation or sprinkling with a water temperature that is not significantly different from the soil temperature. .

(Means for Solving the Problems) In order to achieve the above object, the soil temperature control device according to the present invention communicates and connects a constant temperature water tank containing one or more pots filled with soil to a water temperature control machine. to form a temperature-controlled water circulation path, and insert and arrange a heat exchanger by immersing it in the temperature-controlled water in the constant-temperature water tank,
The gist is that a heat exchange water inlet and a heat exchange water outlet of the heat exchanger are opened to the outside of the constant temperature water tank, and a water supply tap is connected to the heat exchange water inlet side.

(Function) According to the above configuration, water supplied for irrigation or sprinkling is passed through the heat exchange water inlet as exchange water, and this exchange water is approximately symmetrical in the heat exchanger due to the thermal action of the temperature controlled water in the constant temperature water tank. The temperature is balanced, and it is possible to obtain heat that is approximately equal to the soil temperature in the pot.

(Embodiment) An embodiment of the soil temperature control device according to the present invention will be described below with reference to the drawings.

In the drawings, reference numeral 1 designates one or more pots filled with soil 2, which are housed in a constant temperature water tank 3 with their upper portions exposed from the temperature controlled water 4. Constant temperature water tank 3 is
It is connected to a water temperature regulator 7 via a temperature-controlled water outlet 5 and a temperature-controlled water suction port 6, and forms a circulation path 8 for the temperature-controlled water 4 with the water temperature regulator 7. That is, the temperature-controlled water 4, which has been controlled to a desired temperature in the water temperature regulator 7, flows into the constant-temperature water tank 3, exerts a thermal effect on the wall surface of the pot 1, and then flows out from the temperature-controlled water suction port 6 side and enters the water temperature regulator. It circulates so that it is sucked back into 7. Therefore, the soil 2 in the pot 1 is heated by the controlled water 4 due to the heat action from the wall of the pot 1.
level soil temperature to obtain the desired temperature conditions for plant growth experiments.

A heat exchanger 9 is inserted into a gap in the constant temperature water tank 3 and immersed in the temperature controlled water 4. This heat exchanger 9 is opened to the outside of the constant temperature water tank 3 through a heat exchange water inlet 10 and a heat exchange water outlet 11, and a water supply tap such as a tap water pipe (not shown) is appropriately connected to the heat exchange water inlet 10 side. ) is connected so that exchange water, that is, water for irrigation or sprinkling, can flow into the heat exchanger 9. The moisture is balanced at approximately the same temperature in the heat exchanger 9 by the thermal action of the temperature-controlled water 4 in the constant temperature water tank 3, and the exchange water flowing out from the heat exchange water outlet 11 reaches the temperature of the soil in the pot 1. is approximately equal to By using this exchanged water as water for irrigation or sprinkling of plants growing in the pot 1, the temperature conditions of the soil in the pot 1 are not disturbed.

(Effects of the invention) Since the present invention is constructed as described above, it is possible to obtain water supply for irrigation or sprinkling at a temperature approximately equal to the soil temperature.
It is possible to provide a soil temperature control device that does not disturb soil temperature conditions, and the present invention has excellent practical effects after implementation.

[Brief explanation of the drawing]

The drawing is a system diagram showing one embodiment of the soil temperature control device according to the present invention. 1... Pot, 2... Soil, 3... Constant temperature water tank,
4... Temperature control water, 7... Water temperature regulator, 9... Heat exchanger, 10... Heat exchange water inlet, 11... Heat exchange water outlet.

Claims (1)

[Scope of Claim for Utility Model Registration] A constant-temperature water tank containing one or more pots filled with soil is connected in communication with a water temperature controller to form a temperature-controlled water circulation path, and the pot is immersed in the temperature-controlled water in the constant-temperature water tank. A heat exchanger is inserted and arranged by immersion, the heat exchange water inlet and heat exchange water outlet of the heat exchanger are opened to the outside of the constant temperature water tank, and a water tap is connected to the heat exchange water inlet side. Soil temperature control device.