JPS6235319Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a greenhouse plant growing device.

In order to grow crops most efficiently and effectively in greenhouse cultivation, the indoor temperature should always be kept at a constant temperature suitable for growth, and at the same time carbon dioxide gas should be supplied as needed to promote carbon dioxide assimilation as much as possible. . In terms of indoor temperature, it is necessary to keep it warm throughout the day or at least through the night when there is a large temperature drop (heaters for greenhouses have been developed for this purpose), and to supply carbon dioxide, it is necessary to keep it warm throughout the day, or at least through the night when there is a large temperature drop. It is necessary to do this well before and after sunrise when it is most active, and for this purpose, in an effort to develop a single device that can have both of the above functions, for example, Patent No. 857675
No. (Special Publication No. 51-31725) was developed. However, even in this invented device, if the excess air ratio that should increase the efficiency of the heater is reduced,
Harmful carbon monoxide is generated, but in order to reduce this carbon monoxide to zero, the excess air ratio must be increased, which reduces efficiency. Not only is it insufficient in terms of thermal economy because it lacks consideration of the use of thermal energy, but it also lacks consideration of exhaust emissions from combustion equipment, and exhaust emissions are affected by external influences (especially wind effects). As a result, the combustion state changes, causing problems in terms of operation, and the handling of the machine is difficult for amateurs to operate, and furthermore, it is impossible to supply carbon dioxide except when the heater is operating. However, it was not possible to avoid the drawbacks such as:

The present invention eliminates the above-mentioned drawbacks of the conventional device, and embodiments of the present invention will be described below with reference to the drawings.

In the figure, 22 is a greenhouse, and inside the greenhouse 22,
Main blower 9 and hot air outlet 10 for supplying hot air inside the greenhouse
There is a heating device main body 1 which heats and circulates the air in the greenhouse, and a combustion air fan 5 which takes in combustion air to a burner 4 for a combustion chamber 2 in the heating device main body 1. Arrange. A heating combustor main valve 7 is disposed in a fuel gas supply pipe 6 for sending fuel gas to the combustion chamber 2. Reference numeral 17 is a combustion tube for generating carbon dioxide gas, and in the illustrated embodiment, the hot air outlet 10 is located below the combustion chamber 2 so as to open into the flow path 21 between the main blower 9 and the hot air outlet 10. In this way, the combustion tube 17 is provided between the combustion chamber 2 and the hot air outlet 10, although it is provided at a higher position. Thus, the air supply duct 12 to the combustion tube 17 is opened near the air outlet of the main blower 9. Furthermore, a protection tube 18 is provided around the outer circumference of the combustion tube 17, which also serves to prevent overcooling, so that complete combustion for generating carbon dioxide gas can be carried out in the combustion tube 17 under the best temperature conditions. do. (However, if the temperature conditions of the combustion tube 17 are good, the protection tube 1
8 may be omitted. ) Actually, the above-mentioned combustion tube 17 for generating carbon dioxide gas
to the main blower 9 via the air supply duct 12.
The amount of air sent from the combustion tube 17 is slightly excessive for combustion air for combustion in the combustion tube 17, so that complete combustion without carbon monoxide gas is carried out.

In addition, 3 is a chimney connection port, and the combustion chamber 2
This is to send the exhaust gas from the chimney to the chimney (not shown). 8 is the combustion tube 1 of the carbon dioxide gas generator 13
7 is a solenoid valve for a carbon dioxide generator that controls the inflow of fuel gas supplied to 7; 14 is a connection duct connection port;
5 is an electrode rod for ignition. The combustion tube 17 combusts combustion gas to generate carbon dioxide gas, and needs to be cooled due to the generated heat. As shown in FIG. 1, a combustion tube 17 is installed in a part of the air passage 2.

In the present invention, as described above, a combustion cylinder 17 for generating carbon dioxide gas is installed between the combustion chamber 2 and the hot air outlet 10 in the flow path 21 between the main blower 9 and the hot air outlet 10. With this arrangement, the combustion tube 17 is uniformly cooled by the air flow to the hot air outlet 10, so there is no risk of overheating, and the air supply duct 12 to the combustion tube 17 is By opening near the air outlet of the main blower 9, there is no need for a special blower to send air into the combustion tube 17 for generating carbon dioxide gas. The opening is made near the air outlet of the blower 9, and the air intake 11 (inlet) and the opening (outlet) of the combustion tube 17 for generating carbon dioxide gas are arranged in the same heating machine main body 1, so that Combustion tube 1
Air is supplied to the inside of the combustion chamber 7 under pressure, and a sufficient amount of combustion air is supplied. In the greenhouse plant growing device that is the object of the present invention, the time when carbon dioxide gas needs to be supplied and the time when heating is required do not necessarily coincide; It is very convenient to be able to perform supply and heating separately, and when supplying carbon dioxide gas, the combustion tube 17 for this purpose is kept in a good temperature condition.
By receiving a sufficient supply of primary air from the air supply duct 12, sufficient complete combustion can be achieved, and air containing no carbon monoxide gas can be supplied into the greenhouse 22. Furthermore, it has the advantage of being extremely convenient as it is only necessary to incorporate simple equipment into an existing heating machine.

[Brief explanation of the drawing]

The drawings show an embodiment of the greenhouse plant growing device according to the present invention, in which Fig. 1 is an overall front view with a part cut away, and Fig. 2 is a cross-sectional front view of the carbon dioxide gas generator in the same. , Figure 3 is a side view of Figure 1, and Figure 4 is a side view of Figure 1.
FIG. 1 is an electrical circuit diagram for controlling the operation of the device shown in FIG. 1 is the heating machine body, 2 is the combustion chamber built into the main body, 3 is the chimney connection port, 4 is the burner, 5 is the combustion air fan, 6 is the fuel gas supply pipe, 7 is the combustion machine main valve for heating , 8 is a solenoid valve for the carbon dioxide gas generator, 9 is a main blower, 10 is a hot air outlet, 11 is a combustion air intake port for the carbon dioxide gas generator, 12 is an air supply duct, 1
3 is a carbon dioxide gas generator, 14 is a connection duct connection port,
15 is an electrode rod for ignition, 16 is a mounting flange, 17
is a combustion tube for generating carbon dioxide gas, 18 is a protection tube, 20
2 is a heating device, 21 is a flow path, and 22 is a greenhouse.

Claims (1)

[Scope of claim for utility model registration] Main blower 9 and hot air outlet 1 for supplying hot air inside the greenhouse
There is a heating machine main body 1 that heats and circulates the air in the greenhouse, and a fuel gas supply pipe 6 for sending fuel gas to the combustion chamber 2 in the warming machine main body 1.
A heating device 20 in which a heating combustion machine main valve 7 is arranged
In a greenhouse plant growing apparatus in which a carbon dioxide gas generator is provided separately from the combustion chamber 2, the combustion chamber 2 and the temperature are connected in the flow path 21 between the main blower 9 and the hot air outlet 10. Between the wind outlet 10,
A combustion tube 17 for generating carbon dioxide gas is provided so that the combustion tube 17 opens into the flow path 21, and the air intake port 11 of the air supply duct 12 to the combustion tube 17 is connected to the main blower 9. A plant growing device for a greenhouse characterized by having an opening near an air outlet.