JP2006246765A - Boiler for cultivation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a boiler for cultivation which carries out formation of hot water for sterilizing soil and formation of warm water for watering by one boiler. <P>SOLUTION: The hot water boiler (10) for forming hot water at a temperature required for soil disinfection is installed and is equipped with a flow rate control valve (MV1) for changing hot water formed by the hot water boiler (10) from a hot water disinfection hose (19) side of soil (30) to a warm water formation apparatus (20) side or distributing the hot water. The warm water formation apparatus (20) mixes hot water formed by the hot water boiler (10) with water to from warm water suitable for plant growth and connects the warm water to a watering hose (26). The warm water formation apparatus (20) is equipped with a water storage tank (21) for storing a fixed amount of water, mixes water in the water storage tank (21) with hot water at the downstream side of the flow rate control valve (MV1) and circulates the water to form warm water at a temperature suitable for plant growth. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a boiler for cultivation that generates hot water that heats soil to the killing temperature of pathogenic bacteria, or that warms water to be irrigated to a temperature suitable for plant growth.

In general, as a means of performing so-called soil disinfection to kill pathogenic bacteria in the soil, there are chemical disinfection by injecting drugs such as methyl bromide into the soil, hot water disinfection in which the soil is heated to the killing temperature of the pathogen by hot water, etc. is there. In recent years, hot water disinfection has been in the limelight because the chemical disinfection may have an adverse effect on the environment such as pollution. In winter or cold regions, the water to be irrigated is heated to a temperature suitable for plant growth.

By the way, in the past, hot water disinfection uses a dedicated hot water boiler that generates hot water, and when heating the irrigation water, a dedicated hot water boiler is used, which increases equipment costs. It took a lot of time for maintenance and management.
JP 2001-327239 A JP-A-11-42027

An object of the present invention is to obtain a new cultivation boiler that can generate hot water for disinfecting soil with hot water and generate hot water for irrigation with a single boiler.

In order to achieve the above object, the present invention is configured as follows. That is, the invention according to claim 1 is provided with a hot water boiler that generates hot water having a temperature required for soil disinfection, and the hot water generated by the hot water boiler is supplied to the hot water disinfection hose side and the hot water generation device side of the soil. The hot water generating device generates hot water having a temperature suitable for plant growth by mixing water with the hot water generated by the hot water boiler. Can be connected to the irrigation hose.
According to a second aspect of the present invention, as the configuration of the hot water generator, a water storage tank for storing a predetermined amount of water is provided, and the water in the water storage tank is mixed and circulated with hot water on the downstream side of the flow rate adjustment valve. It is designed to generate hot water having a temperature suitable for the growth.

In the invention according to claim 1, when the flow control valve is switched to the hot water disinfection hose side, the hot water generated by the hot water boiler is supplied to the soil via the hot water disinfection hose, and the soil is killed by the pathogenic bacteria. It will be heated up to, that is, hot water disinfection. When the flow rate adjustment valve is switched to the hot water generator side, the hot water generator mixes the hot water generated by the hot water boiler with water to generate hot water, and the hot water passes through the irrigation hose. It will be irrigated with warm water suitable for growth.

In addition, when the flow rate adjustment valve is operated to an intermediate position between the hot water disinfection hose side and the hot water boiler, a part of the hot water generated by the hot water boiler passes through the hot water disinfection hose to the soil on the disinfection side. The supplied hot water disinfects the soil, the remaining hot water is converted to a temperature suitable for plant growth by the hot water generator, and the hot water is irrigated through the irrigation hose.

According to the second aspect of the present invention, when hot water is supplied to the hot water generator, the hot water generator mixes and circulates the water in the water storage tank with the hot water downstream of the flow control valve, thereby growing the plant. Thus, hot water having a temperature suitable for the temperature can be stably obtained.

Hereinafter, the present invention will be described with reference to the drawings. In the figure, FIG. 1 is a side view of a cultivation boiler according to the present invention, FIG. 2 is a piping diagram showing a piping state of the cultivation boiler according to the present invention, and FIG. 3 is a cross-sectional view of a main part showing a hot water disinfection state of soil. 4 is a cross-sectional view of the main part showing the irrigation state of the plant.

In FIG. 1, reference numeral 1 denotes a cultivation boiler, in which a hot water boiler 10 is placed at the rear part (left part in FIG. 1) and a hot water generator 20 is placed at the front part of the carriage 2. The carriage 2 has a wheel 3 on the rear side and a front leg 4 and a handle 5 on the front side. The front leg 4 is grounded to fix the carriage 2 to the ground during hot water disinfection or warm water irrigation, and the handle 5 when moving. To lift the front leg 4 away from the ground and pull the handle 5 to a predetermined location.

The hot water boiler 10 has a burner 12 for burning kerosene, heavy oil or the like at the rear part of the hot water tank 11, and the water supplied to the hot water tank 11 through the water supply pipe 13 is used for the combustion heat of the burner 12. And it produces | generates to 80 to 95 degreeC hot water. Hot water generated in the hot water boiler 10 is discharged to the outside through the hot water pump P1 and the hot water discharge pipe 14. SV1 is a first temperature control valve. As shown in FIGS. 1 and 2, the temperature of hot water on the discharge side of the hot water pump P1 is detected by the hot water sensor S1, and the temperature is set to a set value, that is, 80 ° C. When it reaches ˜95 ° C., it is switched to the hot water discharge pipe 14 side, and when it is lower than the set value, it is switched to the return pipe 15 side and returned to the hot water tank 11.

A flow control valve MV1 of a three-way switching valve type is attached in the middle of the hot water discharge pipe 14, and the hot water in the hot water discharge pipe 14 is disinfected with the hot water supply passage 16 side for disinfection by the flow control valve MV1. Switch to the water supply path 17 side. As shown in FIG. 2, a large number of sterilization hoses 19 are connected to the sterilization hot water supply passage 16 through distribution pipes 18.

The hot water hot water supply path 17 is connected to the hot water generator 20 so as to obtain hot water of about 35 ° C. The temperature of about 35 ° C. is a temperature at which the temperature when watering from the irrigation hose 26 described later becomes a temperature suitable for plant growth, for example, 25 ° C. to 30 ° C. The hot water generator 20 is configured as shown in FIGS. That is, water such as tap water and well water is introduced into a water storage tank 21 that stores a predetermined amount of water via an introduction pipe 22, and the hot water supply path 17 for hot water is supplied to the water in the water storage tank 21 by a hot water pump P2. Mix with hot water inside. A second temperature control valve SV2 is attached to the downstream end of the hot water hot water supply passage 17. The second temperature regulating valve SV2 detects the temperature of the mixed water by the hot water sensor S2, and when the temperature is a set value, that is, about 35 ° C., the second temperature control valve SV2 is switched to the hot water discharge path 23 side and below the set value. In this case, it is switched to the return pipe 24 side and returned to the water storage tank 21. As shown in FIG. 2, a large number of irrigation hoses 26 are connected to the hot water discharge passage 23 through distribution pipes 25.

Next, the usage mode of the embodiment will be described. First, when hydrothermal disinfecting soil, it is performed as follows. That is, as shown in FIG. 3, the disinfection hose 19 in which many ejection holes are formed is placed on the surface of the soil 30 targeted for disinfection. Next, the surface 30a of the soil 30 is covered with a non-breathable sheet 31 made of a polyethylene sheet or a vinyl sheet, and a weight 32 is placed on the periphery of the sheet 31 to seal it, and the upper surface of the sheet 31 is a lightweight heat insulating sheet. 33.

Next, as shown in FIG. 2, the disinfection hose 19 is connected to the disinfecting hot water supply passage (hose) 16 of the hot water boiler 10 through the distribution pipe 18, and the flow rate adjustment valve MV1 is switched to the distribution pipe 18 side. . In this case, the hot water generated by the hot water boiler 10 is supplied to the disinfection hose 19 via the hot water discharge pipe 14, the disinfection hot water supply path 16, and the distribution pipe 18. Hot water 34 is ejected. This state is maintained and the temperature of the soil 30 reaches, for example, a depth of about 20 cm, and is heated so as to reach the killing temperature (60 ° C. or higher) of the crop pathogen.

Next, when irrigating with warm water, it is performed as follows. That is, as shown in FIG. 4, the irrigation hose 26 in which a large number of ejection holes are formed is placed at a predetermined location on the surface of the cultivation area 35 intended for irrigation. Next, as shown in FIG. 2, the irrigation hose (hose) 26 is connected to the hot water discharge passage 23 of the hot water generating device 20 via the distribution pipe 25, and the flow rate adjustment valve MV <b> 1 described above is connected to the hot water hot water supply passage 17. Switch to the side. Then, the warm water generated by the warm water generating device 20 is supplied to the irrigation hose 26 via the warm water discharge path 23 and the distribution pipe 25, and the warm water 37 of 25 ° C. to 30 ° C. is ejected from the irrigation hose 26, It is irrigated with warm water suitable for growing the plant 36. When both hot water disinfection and irrigation are performed with hot water obtained by the hot water boiler 10, the flow rate adjusting valve MV1 is connected between the disinfecting hot water supply path 16 side and the hot water hot water supply path 17 side. Actuate to an intermediate position.

It is a side view of the boiler for cultivation by the present invention. It is a piping diagram which shows the piping state of the boiler for cultivation by this invention. It is principal part sectional drawing which shows the hot water disinfection state of soil. It is principal part sectional drawing which shows the irrigation state to a plant.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Boiler for cultivation 2 Carriage 3 Wheel 4 Front leg 5 Handle 10 Hot water boiler 11 Hot water tank 12 Burner 13 Water supply pipe 14 Discharge pipe 15 Return pipe 16 Disinfection hot water supply path 17 Hot water hot water supply path 18 Distribution pipe 19 Disinfection Hose 20 Hot water generator 21 Water storage tank 22 Introduction pipe 23 Hot water discharge path 24 Return pipe 25 Distribution pipe 26 Irrigation hose 30 Soil 30a Soil surface 31 Sheet 32 Weight 33 Thermal insulation sheet 34 Hot water 35 Cultivated land 36 Plant 37 Hot water P1 Hot water pump P2 Hot water pump SV1 1st temperature control valve SV2 2nd temperature control valve MV1 Flow control valve (three-way switching valve)
S1 Hot water sensor S2 Hot water sensor

Claims (2)

A hot water boiler (10) for generating hot water at a temperature required for soil disinfection is provided, and hot water generated by the hot water boiler (10) is used to generate hot water from the hot water disinfection hose (19) side of the soil (30). A flow control valve (MV1) for switching to or distributing to the device (20) side is provided, and the hot water generator (20) mixes water with the hot water generated by the hot water boiler (10) to produce a plant. A boiler for cultivation characterized in that it generates hot water having a temperature suitable for growing the water and connects the hot water to an irrigation hose (26). The hot water generator (20) includes a water storage tank (21) for storing a predetermined amount of water, and mixes and circulates the water in the water storage tank (21) with hot water downstream of the flow rate adjustment valve (MV1). 2. The boiler for cultivation according to claim 1, wherein hot water having a temperature suitable for plant growth is generated.

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