JPS63296626A - Culture bed for raising seedling - Google Patents

Abstract

PURPOSE:To enable quick heating or cooling of a culture bed for raising of seedling, by filling a space under a raising box with a liquid having low specific heat, e.g. ethylene glycol and heating the liquid with a heater. CONSTITUTION:A liquid 20 having low specific heat, e.g. ethylene glycol is filled in the lower space 16 of a raising box or in a circulation pipe placed in the lower space and is heated by electrifying an electric heater 22. A culture bed 12 for raising seedling is heated to the optimum temperature through the bottom plate of the raising box 10 to enable direct heating of the seed or root from inside. Since a liquid having low specific heat is rapidly heated and cooled, the temperature of the culture bed 12 of the raising box can be delicately controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a cultivation bed for raising seedlings, and more specifically, a cultivation bed that can easily control the temperature of the cultivation bed and suitably raise seedlings of various plants. Regarding cultivation beds.

(Conventional technology) Various types of cultivation beds for raising seedlings are being considered.

A common cultivation bed for raising seeds and seedlings is to spread a bedding material inside a cultivation box and sow seeds onto the bedding material. To control the temperature, the cultivation bed is housed in a plastic greenhouse, etc., and the early seedlings are raised using solar heat. Conventionally, various materials, compositions, etc. of the above-mentioned flooring materials have been studied.

(Problems to be Solved by the Invention) Conventional considerations regarding cultivation beds for raising seedlings have focused primarily on the flooring material as described above, and no progress has been made in examining other matters.

For example, the temperature was controlled by solar heat as mentioned above, or by installing a heater inside the greenhouse.

However, such temperature regulation has the problem that fine control is difficult and suitable seedling growth cannot be carried out.

The present invention was made in view of these circumstances, and
The purpose is to provide a cultivation bed for raising seedlings that can easily control the temperature of the cultivation bed and can suitably raise seedlings of various plants.

(Summary of the invention) The present invention includes the following configuration to achieve the above object.

That is, the seedling raising bed material, an upper space for storing the seedling raising bed material, and a seedling raising box having a lower space formed below, which is partitioned from the upper space and having a lower space formed below, and the upper space are separated from each other. A heat transfer liquid such as ethylene glycol with a high boiling point, low freezing point, and small specific heat, which is sealed in a circulation pipe arranged in the lower space of the box, and the heat transfer liquid. A cultivation bed for raising seedlings, characterized by comprising a heater for heating.

(Function) In FIG. 1, the ethylene glycol 20 is heated by supplying electricity to the electric heater 22, and the temperature of the seedling raising bed material 12 is raised to an appropriate temperature via the bottom plate 24 of the seedling raising box 10.

This allows the seeds or roots to be directly heated from within, making it possible to raise seedlings at an early stage. ethylene glycol 20
Since the specific heat is small, the temperature can be raised and lowered quickly, and the temperature of the seedling raising bed material 12 can be precisely controlled.

(Embodiments) Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a sectional view of a cultivation bed for raising seedlings.

In the figure, 10 is a seedling growing box, which is made of a metal with excellent thermal conductivity such as copper or copper alloy. Seedling box 10
As shown in the figure, there is an upper space 1 for storing bed material 12 for raising seedlings.
4, and a lower space 16 partitioned below the upper space 14.
It is formed into a double structure with. The lower space 16 also extends into the side wall 18 to form the upper space 14. However, the lower space 16 does not necessarily have to extend into the side wall 18. Moreover, the side wall 18 is not necessarily formed integrally with the seedling raising box 10, and may be formed so as to be separable.

The seedling raising bed material 12 may be, for example, suitably granulated soil or rock wool, but the material is not particularly limited in the present invention.

Ethylene glycol 2 is contained in the lower space 16 of the seedling box 10.
Filled with 0s. This ethylene glycol 20 used is essentially 100% stock solution. Note that glycols have hygroscopic properties, so some amount of water may be mixed in.

Furthermore, it is preferable to mix some inhibitor to prevent rust.

22 is an electric heater that heats the ethylene glycol 20.

The present invention is configured as described above.

Therefore, the seedling raising bed material 1 is placed in the upper space 14 of the seedling raising box 10.
2, adjust the moisture content, and sow seeds to raise seedlings. At this time, the ethylene glycol 20 is heated by supplying electricity to the electric heater 12, and the temperature of the seedling raising bed material 12 is raised to an appropriate temperature via the bottom plate 24 of the seedling raising box 10.

This directly heats the seeds or roots, making it possible to raise seedlings at an early stage. Since ethylene glycol 20 has a small specific heat, the temperature can be raised and lowered quickly, and the temperature of the seedling raising bed material 12 can be precisely controlled. Although not shown, a temperature detection unit such as a thermostat is provided.

Although ethylene glycol 2° was used in the above example, it goes without saying that the present invention is not limited to this.
Other glycols such as propylene glycol can also be suitably used. Glycols do not freeze easily, so
It is also excellent in this respect. In addition to glycols, liquids with high boiling points, low freezing points, and small specific heats, such as glycerin, can be used.

The above-mentioned cultivation bed for raising seedlings may be a flat bed or may be multi-tiered. Alternatively, the entire area may be covered with a plastic greenhouse to utilize solar heat.

FIG. 2 shows another embodiment.

In this embodiment, a circulation pipe 26 is provided in the lower space 16 of the seedling raising box 10, and ethylene glycol is circulated into the circulation pipe 26 from the outside. This ethylene glycol is heated by an external heater (not shown) and circulated by a circulation pump (not shown).

The circulation pipe 26 is in contact with the ceiling of the lower space 16 of the seedling growing box 10, thereby heating the bottom plate of the seedling growing box 10 and further heating the seedling growing bed material 12.

Note that the lower space may also be filled with the same liquid or another liquid such as water, and electrical heating may be performed via this other liquid. In this case, the circulation pipe 26 does not necessarily need to be in contact with the ceiling of the lower space 16.

Various embodiments of the present invention have been described above, but
It goes without saying that the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the invention.

(Effects of the Invention) As described above, according to the cultivation bed for raising seedlings according to the present invention, ethylene glycol or the like having a low specific heat is filled in the lower space of the seedling raising box or sealed in the circulation pipe arranged in the lower space. Since the liquid is heated by a heater, the temperature of the seedling raising bed material can be quickly raised and lowered, and the temperature can be easily controlled. Moreover, since the bed material for raising seedlings is heated from the inside, the seeds and roots are directly heated, which has the remarkable effect of allowing early seedling raising.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a cultivation bed for raising seedlings, and FIG. 2 is a sectional view showing another embodiment. 10... Seedling raising box, 12... Seedling raising bed material, 14
...Upper space, 16...Lower space, 18...
side wall, 20... ethylene glycol, 22...
Heater, 26...Circulation pipe.

Claims (1)

[Claims] 1. Bedding material for raising seedlings, There is an upper space and The upper space is separated from the upper space. The bottom formed at least downwardly between A seedling nursery box having a partition space; The lower space of the seedling box is filled with or a circulation pipe placed in the lower space. Ethylene glycol encapsulated in High boiling point, low freezing point, and small specific heat such as heat transfer liquid, a heater that heats the heat medium liquid; A plant for raising seedlings characterized by comprising: Culture bed.