JP7135834B2 - Carbon dioxide supply device - Google Patents

Description

The present invention relates to a carbon dioxide supply device.

As a carbon dioxide gas (carbon dioxide) supply device, a configuration using exhaust gas from a combustion device that burns fuel is known. As such a combustion device, for example, an outdoor combustor as described in Japanese Utility Model Publication No. 57-261 (Patent Document 1) can be used.

In the combustor described in Patent Literature 1, an intake port is provided on the upper surface of the combustor body, and an exhaust pipe is erected with a gap in the intake port. The upper end of the exhaust pipe is open upward. An umbrella-shaped rainproof plate covering the intake port is provided on the outer circumference of the exhaust pipe and above the main body of the combustor.

Japanese Utility Model Publication No. 57-261

In a combustor such as that disclosed in Patent Document 1, an intake port is arranged on the upper surface of the combustor body, and an exhaust pipe is arranged with a gap between the intake port and the exhaust pipe. There is concern that it may be sucked into the mouth. There is a concern that the exhaust gas sucked into the intake port is sent to the burner built in the combustor main body, which deteriorates the combustion state of the burner.

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

According to one aspect of the present invention, a carbon dioxide supply device includes a housing, an intake cylinder and an exhaust cylinder, an intake fan, a combustion mechanism, a passage for exhaust gas from the combustion mechanism, and a cover member. The intake pipe and the exhaust pipe are provided on one surface of the plurality of surfaces of the housing. The intake fan is built in the housing and configured to draw outside air from the intake port in the intake cylinder. The combustion mechanism is built into the housing and configured to burn fuel using air drawn in by the intake fan. A passageway for exhaust from the combustion mechanism is formed inside the housing between the combustion mechanism and an exhaust port in the exhaust stack. The cover member is provided on the one surface of the housing so as to cover the intake port. The cover member has a first side and a second side. The first surface is positioned above the intake cylinder and is arranged so as to overlap the intake port in a plan view of the one surface of the housing. A second surface is positioned between the intake and exhaust stacks and upstanding from the one surface of the housing. The cover member is open on the side opposite to the second surface with the intake cylinder interposed therebetween.

According to the present invention, it is possible to provide an intake/exhaust structure capable of suppressing entry of moisture and exhaust gas into an intake port in a carbon dioxide gas supply device using exhaust gas from a 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; 4 is an external view showing a configuration example of a cover member; FIG. FIG. 5 is an external view of the cover member viewed from the direction of arrow A in FIG. 4; It is a top view of a cover member.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, 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 showing a configuration example 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 supply device 10 includes intake fan 130 , combustion mechanism 140 , and heat exchanger 155 built into 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 fuel (eg, oil, 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. It should be noted that the terms “intake cylinder”, “intake port” and “intake fan” in the specification of the present application mean that they supply air for combustion to the combustion mechanism 140. It can be rephrased as "ki fan" respectively. In addition, "air intake/exhaust configuration" can be rephrased as "air supply/exhaust configuration".

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.

Liquid medium 153 flows through a circulation path including pipes 181 and 182 and radiator 180 ( FIG. 1 ) in response to operation of 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 piping arranged in a greenhouse or the like to the above-mentioned 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. preferable. The intake port 111 is also provided on the same surface as the exhaust port 121 , ie, on the top surface 101 . 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 installed in a narrow space.

Duct hood 200 is attached to the surface (top surface 101 in FIG. 2) on which intake port 111 and exhaust port 121 of housing 100 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 be provided with a blower fan 255 for sending the carbon dioxide gas to a supply destination such as a greenhouse. The duct 250 is branched into a plurality of output pipes 260 on the downstream side of the blower fan 255 . 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 255, each output tube 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 a rectangular parallelepiped shape, for example, 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 "third 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 "fourth side." 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 "fifth surface". A net (not shown) may be attached to each ventilation port 209 to prevent foreign matter from entering. The net can be formed using, for example, a metal (typically stainless steel) mesh plate. A mesh can be attached to the entire surface of the vent 209 .

By attaching duct hood 200 to top surface 101 of housing 100 , duct hood 200 has an internal space that is separated from the outside of duct hood 200 by top surface 205 and side surfaces 206 .

Bottom surface 207 of duct hood 200 is provided with openings for communicating intake port 111 and exhaust port 121 with the internal space of duct hood 200 . Accordingly, by attaching the duct hood 200 to the top surface 101 of the housing 100, both the intake port 111 and the exhaust port 121 communicate with the common internal space. Thereby, the external pressure acting on the intake port 111 and the exhaust port 121 is made common.

When the external pressure becomes imbalanced between the intake port 111 and the exhaust port 121, the imbalance of the intake pressure and the exhaust pressure causes the pressure inside the enclosure 100, in particular at the combustion mechanism 140, to rise or exceed the proper value. There is concern that the combustion state will become unstable due to the decrease. In particular, if the duct 250 provided with the blower fan 255 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 significant.

In contrast, 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, thereby It is possible to realize an intake/exhaust configuration that suppresses destabilization of combustion.

Further, in the internal space of the duct hood 200 , a mixture of the outside air introduced from the ventilation port 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, the carbon dioxide supplied from each output pipe 260 via the duct 250 can be prevented from being overheated.

On the other hand, since the intake port 111 and the exhaust port 121 are arranged on the same surface of the housing 100 (top surface 101 in FIG. 1), the exhaust gas output from the exhaust port 121 may be sucked into the intake port 111. Concerned. Exhaust gas sucked into intake port 111 is sent to combustion mechanism 140 via intake fan 130, and there is concern that the combustion state in combustion mechanism 140 may deteriorate.

In addition, since the air intake port 111 is arranged on the top surface 101 of the housing 100, if moisture such as rainwater splashes on the duct hood 200 or the top surface 101, the moisture will enter from the air intake port 111, and the air intake fan 130 and the like will be cooled. , there is a concern that parts built in the housing 100 may break down. The exhaust port 121 is also arranged on the top surface 101 of the housing 100 in the same manner as the intake port 111, but the exhaust port 121 does not have a component that can be damaged by moisture. Moreover, even if moisture enters, the moisture may be evaporated by the high-temperature exhaust gas. Therefore, it can be said that the influence of moisture entering the exhaust port 121 is small.

In the carbon dioxide gas supply device 10 according to the present embodiment, a cover member 300 is provided so as to cover the intake port 111 . The cover member 300 is arranged in the internal space of the duct hood 200 along with the intake port 111 and the exhaust port 121 . The cover member 300 is configured to allow outside air to be drawn in through the intake port 111 while suppressing the intrusion of the exhaust air output from the exhaust port 121 and the infiltration of moisture from the outside of the duct hood 200 . The configuration of the cover member 300 will be described in detail below with reference to FIGS. 4 to 6. FIG.

FIG. 4 is an external view showing a configuration example of the cover member 300. As shown in FIG. Note that the illustration of the duct hood 200 is omitted in the external view of FIG. 4 . FIG. 5 is an external view seen from direction A in FIG. 6 is a plan view of the cover member 300. FIG.

Referring to FIGS. 4 and 5, cover member 300 is provided around intake cylinder 110 . Cover member 300 has a top surface 301 and side surfaces 302 and 303 . The cover member 300 is made of, for example, stainless steel.

The upper surface 301 is provided above the intake cylinder 110 . As shown in FIG. 5 , the upper surface 301 is spaced upward from the end of the intake cylinder 110 . As shown in FIG. 6 , the upper surface 301 is arranged so as to overlap the intake port 111 in a plan view seen from the top surface 101 of the housing 100 . That is, the upper surface 301 corresponds to an example of the "first surface". By arranging the upper surface 301 so as to cover the entire surface of the intake port 111 , it is possible to effectively prevent moisture from entering the intake port 111 .

In the example of FIG. 4 , the top surface 301 of the cover member 300 is arranged substantially parallel to the top surface 101 of the housing 100 and the bottom surface 207 of the duct hood 200 . However, the upper surface 301 does not necessarily have to be arranged parallel to the top surface 101 and the bottom surface 207 as long as it overlaps with the intake port 111 in plan view.

Side surface 302 is arranged between intake cylinder 110 and exhaust cylinder 120 so as to stand up from top surface 101 . That is, side surface 302 corresponds to an example of a "second surface." In the example of FIG. 4, the side surface 302 has a rectangular shape and is arranged so as to extend in the same direction (that is, the vertical direction) as the direction in which the intake cylinder 110 and the exhaust cylinder 120 extend (the vertical direction in FIG. 4). .

Side 303 is attached to side 206 of duct hood 200 . For example, the cover member 300 is fixed to the bottom surface 207 of the duct hood 200 by attaching the side surface 303 to the side surface 206 with a fastening member such as a screw.

By arranging the side surface 302 between the intake cylinder 110 and the exhaust cylinder 120 , it is possible to block the path of the exhaust gas output from the exhaust cylinder 120 reaching the intake cylinder 110 . As shown in FIG. 5, the cover member 300 does not have a side surface on the side opposite to the side surface 302 with the intake cylinder 110 interposed therebetween, and is in an open state. With such a configuration, outside air is led to intake cylinder 110 through the opening of cover member 300 and the gap between upper surface 301 and the end of intake cylinder 110 . That is, outside air is led from the side opposite to the exhaust pipe 120 toward the intake pipe 110 . As a result, it is possible to suppress the entry of exhaust gas into the intake port 111 .

If the distance between the end of the intake cylinder 110 and the upper surface 301 (corresponding to the length L in the drawing) is narrowed, it becomes difficult for water to enter the intake port 111, but the intake resistance increases, so that the intake air is reduced. Insufficient, it will lead to deterioration of the combustion state. Therefore, it is preferable to set the distance between the end of intake cylinder 110 and upper surface 301 through experiments or simulations to an appropriate length that can suppress the infiltration of moisture and suppress the increase in intake resistance.

As shown in FIG. 5, the side surface 302 is formed with a vent hole 305 penetrating through the side surface 302 . As a result, the outside air introduced into cover member 300 through the opening of cover member 300 is sucked into intake cylinder 110 and flows outside cover member 300 (that is, toward exhaust cylinder 120 ) through vent 305 . A path is formed. By providing the ventilation port 305 in the side surface 302 in this way, it is possible to prevent the outside air introduced from the ventilation port 209 of the duct hood 200 toward the intake cylinder 110 from staying inside the cover member 300 . As a result, provision of the cover member 300 can prevent the external pressure balance between the intake port 111 and the exhaust port 121 from being disturbed.

Further, even in a situation where the external air led into the cover member 300 contains exhaust air, the exhaust air can be output to the outside of the cover member 300 (exhaust pipe 120 side) from the ventilation openings 305 together with the external air. Therefore, since the exhaust gas does not stay inside the cover member 300 , it is possible to suppress the intake of the exhaust gas into the intake port 111 .

In addition, it is preferable to form the ventilation port 305 at a position distant from the intake pipe 110 when viewed from the exhaust pipe 120 . Specifically, it is preferable to form the ventilation port 305 on the side surface 302 at a position where the distance between the exhaust pipe 120 and the ventilation port 305 is as long as possible. By doing so, it is possible to prevent the exhaust gas output from the exhaust pipe 120 from being directly guided into the cover member 300 through the ventilation port 305 .

Further, it is preferable that the ventilation port 305 is arranged so as not to overlap the intake cylinder 110 when the side surface 302 is viewed from the exhaust cylinder 120 side. In this configuration example, as shown in FIG. 6, when the side surface 302 is viewed from the side of the exhaust pipe 120, the ventilation port 305 is arranged at a position where the opening end of the ventilation port 305 and the side surface of the intake pipe 110 overlap. do not have. As the opening area of the ventilation port 305 increases, the exhaust gas output from the exhaust pipe 120 flows into the cover member 300 through the ventilation port 305 and is easily sucked into the intake pipe 110 . By arranging the ventilation port 305 so that the intake pipe 110 and the ventilation port 305 do not overlap, it is possible to suppress the exhaust gas output from the exhaust pipe 120 from flowing into the intake pipe 110 through the ventilation port 305 as it is.

In addition, the length of the ventilation port 305 in the direction in which the intake cylinder 110 extends (that is, the height of the ventilation port 305) must be equal to or less than the length in the direction in which the intake cylinder 110 extends (that is, the height of the intake cylinder 110). is preferred. This is because if the height of the air vent 305 is higher than the height of the intake cylinder 110 , the exhaust gas output from the exhaust cylinder 120 tends to flow directly into the intake cylinder 110 through the air vent 305 .

Referring to FIG. 5, a lid member 112 is attached to the end surface of intake cylinder 110 . Lid member 112 is provided to adjust the opening diameter of intake port 111 . Specifically, referring to FIG. 6, lid member 112 has a disc shape with an open center. Assuming that the opening diameter of the intake cylinder 110 is φB1 and the opening diameter of the cover member 112 is φB2, the relationship φB1>φB2 is established. Further, when the opening diameter of the end surface of the exhaust pipe 120 is φA, the relationship φA>φB2 holds. That is, by providing lid member 112 , the opening diameter of the end surface of intake cylinder 110 can be made smaller than the opening diameter of the end surface of exhaust cylinder 120 .

By adjusting at least one of the opening diameter of the intake cylinder 110 and the opening diameter of the exhaust cylinder 120 using the lid member 112 in this manner, the ventilation resistance inside the housing 100 can be adjusted. Note that the lid member 112 is preferably provided on the end surface of the intake cylinder 110 . The ventilation resistance can also be adjusted by providing the lid member 112 on the end face of the exhaust pipe 120, but if the lid member 112 is provided on the exhaust pipe 120, fluctuations in internal pressure such as during the ignition operation of the combustion mechanism 140 will occur. This is because if the lid member 112 is large, the lid member 112 may act as an exhaust resistance and generate an abnormal noise.

The shape of the exhaust pipe 120 and the intake pipe 110 is an example, and shapes other than cylindrical, such as a rectangular parallelepiped shape or an elliptical cylindrical shape, are also possible. The shape of the cover member 300 is also an example. Also in these cases, a surface (first surface) provided above intake cylinder 110 to cover intake port 111 and a surface (second surface) standing between intake cylinder 110 and exhaust cylinder 120. A similar effect can be obtained by providing the cover member 300 so as to have .

The mounting surface of the exhaust cylinder 120 and the intake cylinder 110 to the housing 100 can also be a side surface other than the top surface 101 . In this case, the mounting surface of the duct hood 200 to the housing 100 can also be the side surface. By arranging the blower fan 255 in the duct 250, even if the exhaust pipe 120, the intake pipe 110 and the duct hood 200 are attached to the side surface of the housing 100, air containing carbon dioxide gas is sucked from the connection port 210. It can be supplied to a vinyl house or the like.

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 meaning and range of equivalents of the scope of the claims.

REFERENCE SIGNS LIST 10 Carbon dioxide gas supply device 100 Housing 110 Intake cylinder 111 Intake port 112 Lid member 120 Exhaust pipe 121 Exhaust port 130 Intake fan 140 Combustion mechanism 200 Duct hood 250 Duct 300 Cover member 301 top surface, 302, 303 side surface, 305 vent.

Claims (7)

a housing;
an intake pipe and an exhaust pipe 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 an intake port in the intake cylinder;
a combustion mechanism that is built in the housing and 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 an exhaust port in the exhaust stack inside the housing;
a cover member provided on the one surface of the housing so as to cover the intake port;
The cover member is
a first surface located above the intake cylinder and arranged so as to overlap the intake port in a plan view of the one surface of the housing;
a second surface arranged to stand up from the one surface of the housing between the intake pipe and the exhaust pipe, and
A carbon dioxide supply device having an opening on the opposite side of the second surface and the intake cylinder. 2. The carbon dioxide supply device according to claim 1, wherein a ventilation hole is formed in said second surface so as to penetrate said second surface. 3. The carbon dioxide supply device according to claim 2, wherein said ventilation port is formed at a position distant from said intake cylinder when viewed from said exhaust cylinder. 4. The carbon dioxide supply device according to claim 2, wherein said ventilation port is arranged so as not to overlap with said intake cylinder when said second surface is viewed from the side where said exhaust pipe is located. 5. The carbon dioxide supply device according to any one of claims 1 to 4, wherein the opening diameter of the end surface of the intake cylinder is smaller than the opening diameter of the end surface of the exhaust cylinder. further comprising a duct hood attached to said one face of said housing;
The duct hood is
a third surface formed with a connection opening with a duct leading to a supply destination of carbon dioxide gas;
at least one fourth surface formed with a vent for introducing outside air;
When the duct hood is attached, the intake port and the exhaust port are provided with respect to an internal space that faces the one surface of the housing and is separated from the outside of the duct hood by the third and fourth surfaces. 6. The carbon dioxide supply device according to any one of claims 1 to 5, further comprising a fifth surface provided with an opening for communication. 7. The carbon dioxide supply device according to any one of claims 1 to 6, wherein said intake cylinder and said exhaust cylinder are provided on the top surface of said housing.

Images