JPS6296021A - Air conditioning system of vinyl greenhouse - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to an air conditioning system for a vinyl house, and more specifically to a hot water supply pipe that forms a heat dissipation surface on the floor of a vinyl house. This invention relates to an air conditioning system for a vinyl greenhouse that uses a turbo boiler with primary air and secondary air supply pipes opened in a combustion chamber as a hot water supply means.

Conventionally, vinyl greenhouses have been used for the year-round cultivation of blood-sucking shiitake mushrooms, vegetables, or fruits. In a vinyl greenhouse, the indoor temperature must be adjusted to match the growth conditions of the cultivated object, and a heavy oil-fired boiler or the like is used as the heat source for the air conditioner.

The heavy oil-fired boiler mentioned above on the left has a relatively easy ignition operation, and once it enters the combustion state, stable combustion conditions can be maintained with almost no manual operation.

However, in recent years, in preparation for the depletion of petroleum resources, there has been a demand for the establishment of air conditioning systems using alternative fuels other than fossil fuels.
For example, the invention of a boiler device that can maintain stable combustion conditions and high combustion efficiency even when using forest residues, lumber waste, pruning techniques, or waste materials such as Hodagi used for cultivating shiitake mushrooms. was requested. In view of this situation, various air conditioning systems for greenhouses incorporating boiler devices for wood fuel have been proposed, but existing boiler devices have complicated structures and are prone to failures. In addition, there were problems such as difficult ignition operations, which significantly restricted the stable operation of the air conditioning system.

The main object of the present invention is to provide a heating/cooling air conditioning system that can solve the above-mentioned problems found in conventional air conditioning systems for greenhouses.

In view of this objective, the present invention provides a turbo boiler (TB) in which primary air and secondary air supply pipes (6a) and (6b) are opened in the combustion chamber (1). , a hot water storage tank (T) connected to the turbo boiler (TB) via a first hot water circulation pump (Pl), and a hot water storage tank (T) connected to the turbo boiler (TB) via a second hot water circulation pump (P2). ), the hot water supply pipe (20) forms a heat radiation surface on the floor surface of the greenhouse (VH) or below the ground surface, and its base end is connected to the chimney bridge (15) of the turbo boiler (TB),
Further, the gist of the present invention is an air conditioning system for a vinyl greenhouse, which is constituted by an exhaust pipe (21) whose tip end is connected to an exhaust fan (F) installed outdoors of the greenhouse.

Hot water generated by burning wood fuel etc. in a turbo boiler (TB) is stored in a hot water storage tank.
After storing in (T), hot water circulation pump (Pr)
By driving the hot water (P2), the hot water is circulated through the hot water supply pipe (20) to obtain predetermined heating conditions. In addition, the high temperature exhaust gas generated in the turbo boiler (TB) is transferred to the exhaust pipe (2).
1), the heating ability due to the circulation of hot water is reinforced and the inside of the greenhouse is maintained at an appropriate temperature.

On the other hand, in the summer, the operation of the turbo boiler (TB) is stopped, cold water is introduced from outside the system into the hot water supply pipe (20), and the inside of the greenhouse is cooled by circulating the cold water.

FIG. 1 is a front view illustrating the overall layout of the air conditioning system for a greenhouse according to the present invention, and FIG. 2 is a plan view thereof. Moreover, FIG. 3 is a GL cross-sectional side view illustrating the overall structure of the turbo boiler, and FIG. 4 is an explanatory diagram of the state of connection between the turbo boiler and the hot water storage tank. Prior to explaining the overall structure of the air conditioning system, the structure of a turbo boiler (TB) will be explained based on FIG.

As shown in the figure, the main body of the cylindrical turbo boiler (TB) has a water tank (2
) are provided. Furthermore, a fan (3) that functions as a type of supercharger is attached to the upper surface of the outer wall of the combustion chamber (1), and the fan has a flow path for relatively low-temperature air supplied from outside the system. Heat exchangers (4a) (4b) are connected to form a thermal energy exchange site between the combustion chamber (1) and the heated air flow path in the combustion chamber (1).

A primary air introduction tube furnace (6a) whose base end (5) is connected to the vicinity of the heat exchanger (4a) extends downward substantially parallel to the wall surface of the water tank (2). , its tip is mounted near the bottom of the furnace (9).
) is opened at the bottom. On the other hand, its proximal end (
A secondary air introduction tube furnace (6b) formed by connecting the air conditioner 5) near the heat exchanger (4b) extends downward approximately parallel to the wall surface of the water tank (2), and has a tip end thereof. Combustion chamber (1)
It is opened in the middle part of. As shown in the figure, the secondary air introduction tube furnace (6a) is formed from a pipe having a larger diameter than the secondary air introduction tube furnace (6b).

On the other hand, a cooling water flow path (8) formed by connecting a plurality of pipes in parallel is arranged inside the Rosdol (7), which functions as a fuel support member, that is, a fire bed. has been done.

Cold water is supplied to the cooling water flow path (8) via a water supply pump (not shown), and the cooling water, which has been preheated by cooling the Rosdol (7), is supplied to the connecting pipe (not shown) and The water tank (2) passes through the water supply port (10).
flows into the tank. In this way, the cooling water flow path (8) functions as a heating prevention device for the Rosdol (7), and also functions as a preheating device for water supplied into the water tank (2), improving the energy saving effect. Contribute to

In addition, in FIG. 3, reference number (10) indicates the ash outlet, (
12) is a fire outlet, (13) is a safety device consisting of a thermostat and alarm buzzer that generates the necessary alarm signal in response to the temperature of hot water in the water tank (2), and (14) is a temperature sensor for measuring hot water temperature. In total, (15) shows the chimney holder installed on the top of the boiler body, and (1st) shows the systank. still,
The outer wall of the boiler body is made of refractory bricks (1
6) and a heat insulating material (17).

As shown in FIG. 1, the air conditioning system for a greenhouse (V) according to the present invention provides hot water storage via a first hot water circulation pump (Pi) to a turbo boiler (TB) having the above-described structure. Connect the tank (T) and
A second hot water circulation pump (P2) is installed in the hot water storage tank.
) by connecting the hot water supply pipe (20) through the
A heat dissipation surface is formed on the floor of the greenhouse or below the ground surface by circulating hot water. Further, in the present invention, an exhaust pipe line (21) whose base end is connected to the chimney bridge (15) of the turbo boiler (TB) is suspended from the ceiling inside the greenhouse (VH). At the same time, by connecting the tip of the exhaust pipe (21) to an exhaust fan (F) installed outdoors of the greenhouse (VH), exhaust heat from the turbo boiler (TB) can be removed. Forming a heating system utilized.

The vinyl greenhouse (VH) illustrated in Figure 1 is designed for cultivating shiitake mushrooms, and has a length of 400 m to 500 m.
In order to ensure hot water supply capacity corresponding to the floor area of
One turbo boiler with an output of 150,000 K cal 7 hours, two hot water storage tanks (TI) (T2) with a capacity of 1200 N each and 20
First and second hot water circulation pumps CPt) (r'2) with outputs of 0 W and 750 W and a diameter of 50
A hot water circulation path is formed by connecting a main hot water supply pipe (20a) with a diameter of m and a sub hot water supply pipe (20b) with a diameter of 25n. In addition, the hot water supply pipe (20) is arranged so that the hot water circulation path is arranged on the floor surface of the greenhouse (VH) so as to form a heat dissipation surface below the bare wood storage shelf [not shown]. It is set up.

The basic structure of the present invention has been exemplified above based on the description of the embodiments, but the scope of the rights of the present invention should not be construed as limited by the description of the above embodiments. Numerous modifications may be included. For example, depending on the type of cultivation target, the hot water supply pipe (20) can be buried under the ground or laid in a hot water pipe storage groove (not shown). In addition, a temperature thermometer (not shown) having a temperature detection range of about 35 degrees Celsius within -10 degrees Celsius is installed at a predetermined position in the greenhouse, and the operating conditions of the turbo boiler (TB) are adjusted based on the detected value of the temperature thermometer. It's okay.

As can be understood from the above explanation, hot water generated by burning cheap wood fuel such as waste wood in a turbo boiler is sent to a greenhouse via a hot water storage tank and a hot water circulation pump. Desired heating conditions can be obtained by circulating hot water through hot water pipes laid on the floor of the room. Furthermore, by flowing high-temperature exhaust gas (5500° C. or higher) generated in the combustion chamber of the turbo boiler into the exhaust pipe, the heating ability due to the hot water circulation can be reinforced. At this time, turbo boilers maintain a high combustion temperature due to the forced introduction of secondary air and secondary air, so wood waste with a high moisture content, which until now was difficult to use as fuel, Good ignitability and high combustion efficiency can also be obtained when using materials such as forest leftover wood, sawmill waste, pruning techniques, or waste materials such as shiitake mushroom cultivation. As a result, the combustion gas is completely gasified, the thermal efficiency of the turbo boiler is improved by more than 30 percent compared to the conventional device, and the adhesion of tar in the exhaust pipe is drastically reduced. On the other hand, in the summer, the device of the present invention can be converted into a cooling system by stopping the operation of the turbo boiler and introducing cold water (for example, groundwater) supplied from outside the system into the hot water supply pipe.

The hot water used for heating has an outlet temperature of around 26°C, so like the cold water used in the cooling system, it can be used for watering shiitake mushroom cultivation, cultivated plants, etc., or for watering underground. It can be refluxed. In this way, the air conditioning system according to the present invention can maintain good heating or cooling conditions inside the greenhouse, regardless of whether it is winter or summer.

[Brief explanation of drawings]

FIG. 1 is a front view illustrating the overall layout of an air conditioning system for a greenhouse according to the present invention, and FIG. 2 is a plan view thereof. Moreover, FIG. 3 is a longitudinal side view illustrating the overall structure of the turbo boiler, and FIG. 4 is an explanatory diagram of the state of connection between the turbo boiler and the hot water storage tank. (1) - Combustion chamber, (6) - Primary air and secondary air supply lines, (TB) - Turbo boiler, (T) - Hot water storage tank, (P) - Hot water circulation pump, (20
) - Hot water supply pipe, (21) - Exhaust pipe, (VH)
-・Vinyl house.

Claims (1)

[Claims] (1) A turbo boiler with primary air and secondary air supply pipes opened in the combustion chamber, a hot water storage tank connected to the turbo boiler via a first hot water circulation pump, and a second hot water circulation system. A hot water supply pipe connected to the hot water storage tank via a pump and forming a heat dissipation surface on the floor or below the ground surface of the greenhouse, and a base end thereof connected to the chimney holder of the turbo boiler, and An air conditioning system for a vinyl house characterized by comprising an exhaust pipe line whose tip is connected to an exhaust fan installed outdoors.