JP7127528B2 - Carbon dioxide supply device - Google Patents

Description

The present invention relates to a carbon dioxide supply device.

A supply device for carbon dioxide gas (carbon dioxide) using exhaust gas from combustion of fuel is described in Japanese Patent Application Laid-Open No. 2017-176169 (Patent Document 1). Further, as an intake/exhaust structure of a combustion device, for example, one described in Japanese Patent No. 4766373 (Patent Document 2) is known.

JP 2017-176169 A Japanese Patent No. 4766373

In a carbon dioxide supply device such as Patent Document 1, exhaust gas (exhaust) from a combustion mechanism built in a housing is output to the outside. If there is an imbalance with the exhaust amount, there is concern that the combustion state in the combustion mechanism will become unstable.

On the other hand, Patent Literature 1 does not describe specific configurations for intake and exhaust. In addition, in the carbon dioxide supply device, it is possible to optimize the temperature of the supplied carbon dioxide gas by mixing the exhaust gas with the outside air. not

SUMMARY OF THE INVENTION The present invention has been made to solve such problems. It is to provide an intake/exhaust structure for suppressing the

According to one aspect of the present invention, the carbon dioxide supply device includes a housing, an intake port and an exhaust port, an intake fan and a combustion mechanism built into the housing, and is attached to one surface of the housing. and a duct hood. The intake port and the exhaust port are provided on one surface of the plurality of surfaces of the housing. The intake fan draws outside air through the intake port. The combustion mechanism uses air drawn by the intake fan to burn fuel. A passageway for exhaust from the combustion mechanism is formed within the housing between the combustion mechanism and the exhaust port. The duct hood has a connection port to a duct leading to a carbon dioxide supply destination, at least one ventilation port for introducing outside air, and an intake port and an exhaust port for the internal space of the duct hood when attached to the housing. and an opening communicating with the .

According to the present invention, in a carbon dioxide gas supply device using exhaust from a combustion mechanism, the intake port and the exhaust port are communicated with a common internal space to suppress the imbalance of the intake pressure and the exhaust pressure, It is possible to suppress destabilization of combustion in the combustion mechanism.

1 is a schematic diagram illustrating the configuration of a carbon dioxide gas supply system to which a carbon dioxide gas supply device according to the present embodiment is applied; FIG. 1 is a schematic diagram for explaining the internal configuration of a carbon dioxide gas supply device according to the present embodiment; FIG. FIG. 3 is an external view showing a configuration example of a duct hood used in the carbon dioxide gas supply device according to the present embodiment; FIG. 4 is an external view for explaining how the duct hood is attached to the carbon dioxide supply device; FIG. 10 is an external view for explaining a comparative example of arrangement of nets for preventing foreign matter from entering.

BEST MODE FOR CARRYING OUT THE INVENTION Below, embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated in principle.

FIG. 1 is a schematic diagram illustrating the configuration of a carbon dioxide supply system to which a carbon dioxide supply device according to the present embodiment is applied.

Referring to FIG. 1 , carbon dioxide gas supply device 10 includes housing 100 containing a combustion mechanism and the like, and duct hood 200 . Duct hood 200 is provided with connection port 210 with duct 250 . Furthermore, the carbon dioxide supply device 10 is connected to a radiator 180 via pipes 181 and 182 .

FIG. 2 is a schematic diagram for explaining the internal configuration of the carbon dioxide supply device according to the present embodiment.
Referring to FIG. 2 , carbon dioxide gas supply device 10 includes intake fan 130 , combustion mechanism 140 and heat exchanger 155 built in housing 100 . The carbon dioxide supply device 10 further includes an intake cylinder 110 and an exhaust cylinder 120 provided on one of the plurality of surfaces of the housing 100 . In this embodiment, the opening formed by the intake cylinder 110 forms the intake port 111 , and the opening formed by the exhaust pipe 120 forms the exhaust port 121 .

Intake fan 130 is arranged near intake port 111 . The intake fan 130 incorporates a fan motor (not shown), and is driven to rotate by the fan motor, thereby sucking outside air from the intake port 111 . Air taken in by intake fan 130 is supplied to combustion mechanism 140 .

Combustion mechanism 140 may typically consist of a burner that burns a fuel (eg, oil or gas) using air drawn in by intake fan 130 . Any device can be used as the combustion mechanism as long as it generates exhaust gas containing carbon dioxide gas (carbon dioxide) by burning fuel.

High-temperature exhaust from combustion mechanism 140 passes through heat exchanger 155 and is output to exhaust passage 170 connected to exhaust port 121 . In the heat exchanger 155, heat exchange between the exhaust gas and the liquid medium 153 increases the temperature of the liquid medium 153 while decreasing the temperature of the exhaust gas.

The liquid medium 153 flows through a circulation path including pipes 181 and 182 and a radiator 180 (FIG. 1) according to the operation of the circulation pump 160 . As a result, the liquid medium 153 whose temperature has been raised by the heat exchanger 155 is delivered to the radiator 180 through the pipe 181 . The temperature of the liquid medium 153 is lowered by passing through the radiator 180 . The liquid medium 153 whose temperature has been lowered by the radiator 180 is returned to the heat exchanger 155 through the pipe 182 . By arranging the radiator 180 as a radiator for the liquid medium 153 in this way, it is possible to continuously perform the process of lowering the temperature of the exhaust gas by the heat exchanger 155 . It should be noted that it is also possible to dispose a radiator different from the radiator 180. For example, by connecting a pipe installed in a vinyl house or the like to the pipes 181 and 182 and the circulation pump 160, It is also possible to use

The exhaust that has passed through the heat exchanger 155 is sent to the exhaust port 121 via the exhaust passage 170 . Even after passing through the heat exchanger 155 , the temperature of the exhaust air is higher than the temperature of the outside air. The intake port 111 is also provided on the same surface as the exhaust port 121 , ie, on the top surface 101 . In addition, by providing the exhaust port 121 and the intake port 111 on the top surface 101, the installation area of the carbon dioxide gas supply device 10 can be reduced, which is advantageous when the carbon dioxide gas supply device 10 is arranged in a narrow space. .

The duct hood 200 is attached to the surface (top surface 101 in FIG. 1) of the housing 100 on which the intake port 111 and the exhaust port 121 are provided. The shape of duct hood 200 will be described later with reference to FIG. 3. Duct hood 200 has a plurality of surfaces 205-207. A surface 205 of the duct hood 200 is provided with a connection port 210 to the duct 250 .

Referring to FIG. 1 again, one end of duct 250 is connected to connection port 210 . As a result, the exhaust port 121 of the carbon dioxide supply device 10 communicates with the duct 250 via the internal space of the duct hood 200 .

It is preferable that the duct 250 is provided with a blower fan 300 for sending the carbon dioxide gas to a supply destination such as a greenhouse. Duct 250 is branched into a plurality of output pipes 260 on the downstream side of blower fan 300 . A plurality of output pipes 260 are arranged in a vinyl house or the like to which carbon dioxide gas is supplied. That is, a carbon dioxide gas supply route is formed from the duct 250 to the supply destination.

By providing a plurality of output pipes 260, a single carbon dioxide supply device 10 can supply carbon dioxide to a plurality of supply destinations. Furthermore, by operating the blower fan 300, each output pipe 260 can apply air pressure to supply carbon dioxide gas. It should be noted that the carbon dioxide supply device 10 according to the present embodiment can be similarly applied to a single carbon dioxide supply destination.

FIG. 3 is an external view showing a configuration example of the duct hood 200. As shown in FIG.
Referring to FIG. 3 , duct hood 200 has, for example, a rectangular parallelepiped shape and has top surface 205 , side surface 206 and bottom surface 207 . A connection port 210 with a duct 250 is provided on the upper surface 205 . That is, the upper surface 205 corresponds to an example of a "first surface". Note that the connection port 210 is also preferably arranged on the upper surface 205 of the duct hood 200 in consideration of the temperature of the exhaust gas output from the exhaust port 121 .

In the rectangular parallelepiped shape, four side surfaces 206 are provided. A vent 209 is formed in each of the side surfaces 206 . That is, side 206 corresponds to one embodiment of a "second side." A mesh 240 is attached to each vent 209 to prevent foreign matter from entering. The net 240 can be formed using, for example, a metal (typically stainless steel) mesh plate. In FIG. 3, only a part of the area is hatched for convenience of description, but in reality, the mesh 240 is attached to the entire surface of the vent 209. As shown in FIG.

When the duct hood 200 is attached, the bottom surface 207 faces the top surface 101 of the housing 100 in which the intake port 111 and the exhaust port 121 are formed. That is, the bottom surface 207 corresponds to an example of the "third surface". The bottom surface 207 is provided with openings 211 and 212 for communicating the intake port 111 and the exhaust port 121 with the internal space of the duct hood 200 when the duct hood 200 is attached to the top surface 101 of the housing 100 .

By attaching the duct hood 200 to the housing 100 , an internal space is formed in the duct hood 200 that is separated from the exterior of the duct hood 200 by the top surface 205 and side surfaces 206 .

FIG. 4 is an external view for explaining how the duct hood 200 is attached to the carbon dioxide supply device 10. As shown in FIG.

Referring to FIG. 4 , duct hood 200 is attached to top surface 101 of housing 100 by passing intake pipe 110 and exhaust pipe 120 through openings 211 and 212 provided in bottom surface 207 of duct hood 200 . As a result, both the intake port 111 and the exhaust port 121 communicate with the common internal space. As a result, the pressure (hereinafter also referred to as “external pressure”) acting from the outside of the housing 100 due to the operation of the blower fan 300 is made common to the intake port 111 and the exhaust port 121 .

If the external pressure becomes unbalanced between the intake port 111 and the exhaust port 121, the imbalance of the intake and exhaust pressures will cause the intake and exhaust pressures inside the housing 100, in particular at the combustion mechanism 140, to increase. There is concern that the combustion state may become unstable due to the loss of balance. In particular, if the duct 250 provided with the blower fan 300 is configured to be connected only to the exhaust tube 120 (exhaust port 121), there is a concern that the imbalance of the external pressure will become conspicuous.

On the other hand, according to the carbon dioxide supply device 10 according to the present embodiment, both the intake port 111 and the exhaust port 121 are commonly communicated with the internal space of the duct hood 200, so that the combustion mechanism 140 It is possible to realize an intake/exhaust configuration that suppresses destabilization of combustion.

Also, in the internal space of the duct hood 200 , a mixture of the outside air introduced from the vent 209 and the exhaust air output from the exhaust port 121 can be supplied from the connection port 210 to the duct 250 . As a result, it is possible to prevent the temperature of the carbon dioxide supplied from each output pipe 260 via the duct 250 from rising too much.

Furthermore, in the carbon dioxide supply device 10 , a net 240 for foreign matter entry is attached to the ventilation holes 209 provided on each side surface 206 , so that the housing 100 can pass through the intake port 111 and the exhaust port 121 . It is possible to prevent foreign matter from entering inside.

FIG. 5 shows a comparative example of the arrangement of nets for preventing entry of foreign matter.
In the comparative example of FIG. 5, the mesh 240 is directly attached to the intake port 111 and the exhaust port 121 without arranging the mesh 240 on the ventilation port 209 of the side surface 206 .

Also in the configuration of the comparative example, the mesh 240 can prevent foreign matter from entering the inside of the housing 100 via the intake port 111 and the exhaust port 121 . However, if a foreign object, especially a foreign object with a relatively large area such as a plastic bag, adheres to the mesh 240, it is feared that part or all of the intake port 111 and the exhaust port 121 will be blocked and the combustion state will become unstable. be done.

Referring to FIGS. 3 and 4 again, in the carbon dioxide gas supply device 10 according to the present embodiment, a net 240 is attached to the vent 209 provided in the side surface 206 of the duct hood 200. Even when the net 240 blocks the intrusion, it is possible to prevent the intake port 111 and the exhaust port 121 from being blocked. As a result, even if the arrangement of the mesh 240 with respect to the intake port 111 and the exhaust port 121 is omitted, it is possible to suppress the destabilization of the combustion state due to the adherence of foreign matter to the intake port 111 and the exhaust port 121 .

In the example of FIG. 3, the vents 209 are provided on almost the entire surface of each side surface 206, but the vents 209 and the mesh 240 covering them may be provided only on a partial area of the side surface 206. good. However, the ventilation area via the net 240 is ensured to be larger than the sum of the ventilation areas of the intake port 111 and the exhaust port 121 .

Furthermore, in the example of FIG. 3, by attaching the net 240 having the same shape to each side surface 206, it is possible to reduce the cost by versatility of parts. Furthermore, on each side 206, guide rails 221-223 of the mesh 240 are provided. Net 240 is fixed to duct hood 200 by fastening members 225 while being fitted in grooves formed between guide rails 221 to 223 and duct hood 200 . The fastening member 225 can be composed of, for example, a screw that is screwed into a screw hole (not shown). As a result, the net 240 can be attached and fixed with a single fastening member 225, so that cost can be reduced by reducing the number of parts, and workability during manufacturing can be improved.

Note that the shape of the duct hood 200 shown in FIGS. 3 and 4 is an example, and it is possible to have a shape other than a rectangular parallelepiped, such as a cylindrical shape or a weighted shape. Regardless of the shape of the duct hood 200, a connection port 210 to the duct 250 and a ventilation port 209 for introducing outside air are provided, and when the duct hood 200 is attached to the housing 100, the intake port 111 and the exhaust port 121 are connected to the duct. By forming so as to communicate with the internal space of hood 200, the same effects as in the present embodiment can be obtained. Further, the attachment surface (third surface) to the housing 100 is not partially provided with openings corresponding to the intake port 111 and the exhaust port 121, but the entire surface is opened to ensure the communication. is also possible. Alternatively, the air vent 209 can also be provided on the surface on which the connection port 210 is provided. Also in these cases, it is possible to arrange the mesh 240 with respect to the vent 209 in the same manner as described in this embodiment.

The mounting surface of the duct hood 200 to the housing 100 can also be a side surface other than the top surface 101 if there are restrictions on space. In particular, by arranging the blower fan 300 in the duct 250, even if the duct hood 200 is attached to the side surface of the housing 100, air containing carbon dioxide gas is sucked from the connection port 210 and supplied to a greenhouse or the like. easier to do.

Further, the terms "intake cylinder", "intake port", and "intake fan" in the present application mean that they supply air for combustion to the combustion mechanism. You can call it "fan". Similarly, the “air intake/exhaust configuration” can also be rephrased as “air supply/exhaust configuration”.

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

10 carbon dioxide supply device 100 housing 101 ceiling 110 intake pipe 111 intake port 120 exhaust pipe 121 exhaust port 130 intake fan 140 combustion mechanism 153 liquid medium 155 heat exchanger 160 circulation pump , 170 exhaust passage, 180 radiator, 181,182 piping (liquid medium), 200 duct hood, 205 top surface, 206 side surface, 207 bottom surface, 209 vent, 210 connection port, 211 opening, 221 to 223 guide rail, 225 fastening member , 240 mesh, 250 duct, 260 power tube, 300 blower fan.

Claims (6)

a housing;
an intake port and an exhaust port provided on one of the plurality of surfaces of the housing;
an intake fan that is built in the housing and sucks outside air from the intake port;
a combustion mechanism built in the housing that burns fuel using the air taken in by the intake fan;
a passage for exhaust from the combustion mechanism formed between the combustion mechanism and the exhaust port inside the housing;
a duct hood attached to the one surface of the housing;
The duct hood has a connection port to a duct leading to a supply destination of carbon dioxide, at least one ventilation port for introducing outside air, and the air intake port for the internal space of the duct hood when attached to the housing. and an opening communicating with the exhaust port. The duct hood is
a first surface on which the connection port is formed;
at least one second surface in which the vent is formed;
2. The carbon dioxide supply device according to claim 1, further comprising a third surface on which said opening is provided. The duct hood is
further comprising a net attached to the vent for preventing foreign matter from entering;
3. The carbon dioxide supply device according to claim 1, wherein the ventilation area of said net is larger than the sum of the ventilation areas of said intake port and said exhaust port. The duct hood has a plurality of the vents,
4. The carbon dioxide supply device according to claim 3, wherein said nets attached to each of said plurality of vents have the same shape. A guide rail for holding the net is arranged around the vent,
5. The carbon dioxide supply device according to claim 3, wherein said net is fixed to said duct hood by a single fastening member while being fitted in a groove formed by said guide rail. The intake port and the exhaust port are provided on the top surface of the housing,
The carbon dioxide supply device according to any one of claims 1 to 5, wherein the connection port of the duct hood is provided on a surface facing the top surface.

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