KR20190024789A - Carbon dioxide application device - Google Patents

Abstract

The present invention relates to a carbon dioxide application device which comprises: an adsorption tank; a supply control section; and a concentration detection section. The supply control section supplies carbon dioxide adsorbed to an adsorbent of the adsorption tank into an agricultural house. Further, the concentration detection section measures or estimates the concentration of the carbon dioxide supplied from the adsorption tank into the agricultural house, and the supply control section supplies carbon dioxide to the agricultural house from an auxiliary application device when the concentration of the carbon dioxide measured or estimated by the concentration detection section falls short of an A threshold while supplying the carbon dioxide from the adsorption tank.

Description

{CARBON DIOXIDE APPLICATION DEVICE}

This disclosure relates to an apparatus for using carbon dioxide.

In order to improve the yield and quality of horticultural plants, a carbon dioxide application device for applying carbon dioxide into an agricultural house is known. On the other hand, the agricultural house is provided with a warmer for preventing the lowering of night temperature. The warming machine burns heavy oil or kerosene, and supplies warm air to agricultural house.

As described in JP-A-2 015-142531, carbon dioxide in the combustion exhaust gas generated from a warmer at night is stored by the adsorbent, and carbon dioxide stored in the storage tank is supplied to the agricultural house during the daytime. Device is designed.

However, for example, when the nighttime operation rate of the warming-up unit is the daytime, a sufficient amount of carbon dioxide is not stored in the adsorbent of the carbon dioxide-utilizing device. As a result, it becomes difficult to sufficiently supply carbon dioxide into the agricultural house during the daytime.

One aspect of the present disclosure is that it is desirable to supply carbon dioxide appropriately into an agricultural house.

One aspect of the present disclosure is a carbon dioxide application apparatus as a main-working apparatus configured to supply carbon dioxide contained in a combustion exhaust gas into an agricultural house. The carbon dioxide application device includes an adsorption tank, an apparatus, a supply control section, and a concentration detection section. The adsorption tank is disposed therein with an adsorbent configured to adsorb carbon dioxide in the combustion exhaust gas. Further, the device is provided in the carbon dioxide supply passage, and is configured to lower the gas in the carbon dioxide supply passage. The supply control unit is configured to supply carbon dioxide adsorbed by the adsorbent of the adsorption tank to the agricultural house through the carbon dioxide supply channel. The concentration detecting unit is configured to measure or estimate the concentration of carbon dioxide supplied from the adsorption tank into the agricultural house. When the concentration of the carbon dioxide measured or estimated by the concentration detecting unit is lower than a predetermined threshold value while the carbon dioxide is being supplied from the adsorption tank into the agricultural house, the supply control unit supplies, through the carbon dioxide supply channel, And is configured to supply carbon dioxide to the agricultural house from the apparatus.

According to this configuration, when the remaining amount of carbon dioxide stored in the adsorption tank is reduced and it becomes impossible to supply a sufficient amount of carbon dioxide from the adsorption tank into the agricultural house, carbon dioxide is supplied into the agricultural house from the auxiliary application device. Thereby, even when a sufficient amount of carbon dioxide is not stored in the adsorption tank, a sufficient amount of carbon dioxide can be supplied into the agricultural house.

Therefore, it is possible to appropriately supply carbon dioxide into the agricultural house.

The concentration detecting unit may be configured to measure or estimate the concentration of carbon dioxide supplied from the auxiliary testing device into the agricultural house. When the concentration of the carbon dioxide supplied from the auxiliary testing device measured or estimated by the concentration detecting section exceeds the predetermined threshold value differently from the above-mentioned threshold value while supplying carbon dioxide into the agricultural house from the auxiliary testing device , And stop the supply of carbon dioxide from the auxiliary testing device.

According to this configuration, as a result of supplying carbon dioxide into the agricultural house from the auxiliary testing device, the supply of carbon dioxide from the auxiliary testing device is stopped when the agricultural house reaches a proper concentration of carbon dioxide. As a result, excessive operation of the auxiliary testing device can be suppressed and carbon dioxide in the agricultural house can be maintained at an appropriate concentration.

The concentration detecting section may measure or estimate the concentration of carbon dioxide supplied into the agricultural house based on the concentration of the carbon dioxide in the carbon dioxide supply passage.

The concentration detecting section may measure or estimate the concentration of carbon dioxide supplied into the agricultural house based on the concentration of the carbon dioxide in the agricultural house.

According to this configuration, the concentration of the carbon dioxide supplied into the agricultural house can be measured or estimated well.

Further, the concentration detecting section may be configured to measure or estimate the concentration of carbon dioxide in the agricultural house. When the concentration of carbon dioxide in the agricultural house measured or estimated by the concentration detection unit exceeds a predetermined threshold different from the above-mentioned threshold value while the carbon dioxide is being supplied into the agricultural house, the supply control unit controls the concentration of carbon dioxide Or may be configured to stop the supply.

According to this configuration, an appropriate amount of carbon dioxide can be supplied into the agricultural house. When the concentration of carbon dioxide in the agricultural house measured or estimated by the concentration detection unit is lower than the above-mentioned different threshold value after the supply of the carbon dioxide to the agricultural house is stopped, The adsorption tank may be configured to supply carbon dioxide into the agricultural house.

According to this configuration, an appropriate amount of carbon dioxide can be supplied into the agricultural house.

Further, the auxiliary test apparatus may be configured as a device for heating the inside of the agricultural house while generating carbon dioxide by burning the fuel.

According to this configuration, the energy can be effectively utilized.

Further, the auxiliary test apparatus may be configured as a device for generating carbon dioxide by burning fuel. The supply control unit is configured to let the combustion exhaust gas generated by the combustion in the auxiliary test apparatus to flow into the adsorption tank through the carbon dioxide supply flow channel so as to adsorb the carbon dioxide contained in the combustion exhaust gas to the adsorbent There may be.

According to this configuration, the carbon dioxide contained in the combustion exhaust gas generated in the auxiliary testing device can be utilized effectively.

Further, the auxiliary pilot apparatus may be configured as a cylinder for storing carbon dioxide. The supply control unit may be configured to supply the diluted carbon dioxide discharged from the auxiliary test apparatus with air into the agricultural house.

According to this configuration, it is possible to suppress the supply of carbon dioxide locally to the agricultural house, or to supply the carbon dioxide at an appropriate concentration into the agricultural house.

Hereinafter, an embodiment to which the present disclosure is applied will be described with reference to the drawings.
Fig. 1 is a block diagram schematically showing a configuration of a carbon dioxide application device in the present embodiment.
2 is a flowchart of CO ₂ supply processing.
3 is a graph showing a change in the concentration of carbon dioxide in an agricultural house.
4 is a graph showing a change in the concentration of carbon dioxide in the flow path of the carbon dioxide application device.

The embodiments of the present disclosure are not limited to the following embodiments, and can take various forms as long as they fall within the technical scope of the present disclosure.

[One. Configuration]

The carbon dioxide application device 1 shown in FIG. 1 has a configuration as a main application device for supplying carbon dioxide contained in combustion exhaust gas into the agricultural house 100. The carbon dioxide application device 1 is disposed inside or outside the agricultural house 100. The carbon dioxide application device 1 includes a combustion device 2, a first liquid storage tank 3, a second liquid storage tank 4, a blower 5, a suction tank 6, 7, a purifier 8, and an assistant applicator 9, as shown in Fig.

The carbon dioxide application device 1 also has a flow path for lowering the combustion exhaust gas and for flowing down the carbon dioxide toward the inside of the agricultural house 100. Specifically, the carbon dioxide application device 1 includes an exhaust gas passage 10, a first introduction passage 11, a cooling air passage 12, a second introduction passage 13, a test air passage House oil passage 15, first to third tank oil passages 18 to 20, and an oil passage 14, an oil passage 15, an auxiliary oil passage 16, a house outside passage 17, The carbon dioxide application device 1 further includes a plurality of open / close valves 12A, 14A, 15A, 15B, 16A, 17A, 17B for opening and closing the flow path.

<Combustion Apparatus>

The combustion apparatus 2 burns fuel such as heavy oil or kerosene mainly at night to warm the air in the agricultural house 100. The combustion exhaust gas is discharged through the exhaust gas flow path 10 which is a chimney.

&Lt; First and second liquid storage tanks >

The first and second liquid storage tanks 3 and 4 store the liquid therein and part of the combustion exhaust gas generated from the combustion device 2 is cooled and purified by the liquid.

The combustion exhaust gas generated in the combustion apparatus 2 flows into the first liquid storage tank 3 through the first introduction passage 11 and the combustion exhaust gas that has passed through the first liquid storage tank 3 flows into the first liquid storage tank 3, 2 introduction flow path 13 into the second liquid storage tank 4. [0064] The combustion exhaust gas that has passed through the second liquid storage tank 4 flows into the in-house flow path 15.

The first and second liquid storage tanks 3 and 4 are each configured so that the combustion exhaust gas flowing into the tank passes through the liquid inside the tank. In the first and second liquid storage tanks 3 and 4, the combustion exhaust gas is cooled by heat exchange with the liquid, and a part of the components contained in the combustion exhaust gas is removed by the compound contained in the liquid. That is, in the carbon dioxide application device 1, the first and second liquid storage tanks 3 and 4 cool and purify the combustion exhaust gas in two stages.

The liquid stored in the first and second liquid storage tanks 3 and 4 is preferably capable of removing harmful substances such as sulfides and / or nitrides contained in the combustion exhaust gas. For example, aqueous solutions of compounds that react with sulfides and / or nitrides are suitable.

The first liquid storage tank 3 is connected to a cooling air flow path 12 for cooling the stored liquid. The cooling air passage (12) cools the liquid by supplying cooling air into the liquid. The cooling air passage 12 has an on-off valve 12A. The open / close valve 12A is opened when the cooling air is supplied into the liquid, and in other cases, the open / close valve 12A is closed.

<Blower>

The blower 5 is installed in the in-house flow path 15 and is a device for lowering the gas in the in-house flow path 15. The blower 5 supplies the combustion exhaust gas to the adsorption tank 6 and supplies the carbon dioxide into the agricultural house 100 from the adsorption tank 6 or the ancillary apparatus 9 through the flow path. Further, one end of the in-house passage 15 is disposed in the agricultural house 100. The out-house flow path 17 is branched from the in-house flow path 15, and one end of the out-of-house flow path 17 is disposed outside the agricultural house 100.

The gas such as combustion exhaust gas in the in-house flow path 15 is transported toward the agricultural house 100 and the out-house flow path 17 by the operation of the blower 5. Hereinafter, the side on which gas to be pressure-fed by the blower 5 is directed is referred to as the downstream side. The opposite side of the downstream side is referred to as the upstream side.

<Adsorption tank>

In the adsorption tank 6, an adsorbent for adsorbing carbon dioxide in the combustion exhaust gas is disposed inside. As the adsorbent, for example, a porous material such as activated carbon or zeolite can be used. The adsorption tank 6 is connected to the first tank flow path 18 branched from the out-house flow path 17. The adsorption tank 6 is connected to the purifying section 8 through the second tank flow passage 19.

In the process of adsorbing carbon dioxide, which will be described later, when the combustion exhaust gas passes through the adsorption tank 6, carbon dioxide in the combustion exhaust gas is adsorbed by the adsorbent. On the other hand, in the step of applying carbon dioxide, which will be described later, when the test air passes through the adsorption tank 6, carbon dioxide is desorbed from the adsorbent. The desorbed carbon dioxide is put into the agricultural house 100.

<Purification Department>

The purifying section 8 removes harmful substances (for example, sulfur oxides, nitrogen oxides, etc.) adversely affecting the plant growth from the combustion exhaust gas. Concretely, for example, the purifying section 8 may have a filter or the like containing granular activated carbon. The purifying unit 8 may remove harmful substances by adsorbing harmful substances contained in the combustion exhaust gas passing through the purifying unit 8 to the granular activated carbon. The purifying section 8 is connected to the third tank flow path 20 branched from the branching point of the in-house flow path 15 with the out-house flow path 17 at the downstream side.

<Auxiliary device>

The auxiliary pilot device 9 supplies carbon dioxide into the agricultural house 100 when carbon dioxide can not be sufficiently supplied from the adsorption tank 6 in the process of applying carbon dioxide. The carbon dioxide application device 1 may also be constructed by using an apparatus conventionally used for application of carbon dioxide into the agricultural house 100 as an auxiliary application device 9. [

The auxiliary pilot device 9 may be configured as a combustion device that generates carbon dioxide by burning a fuel such as kerosene, for example. Further, the auxiliary testing device 9 may be configured as a carbon dioxide bomb that stores, for example, high-pressure carbon dioxide. The carbon dioxide supplied from the auxiliary pilot device 9 flows into the upstream side of the blower 5 in the in-house flow path 15 via the auxiliary flow path 16.

<Multiple Opening and Closing Valves>

Closing valves 12A, 14A and 16A are provided in the cooling air passage 12, the working air passage 14 and the auxiliary passage 16, respectively. The test air passage 14 is a passage branched from the upstream side of the blower 5 in the in-house passage 15, and one end thereof is disposed outside the agricultural house 100.

The in-house passage 15 is provided with first and second open / close valves 15A and 15B. The first on-off valve 15A is located on the upstream side of the branch point of the third tank flow path 20 and on the downstream side of the out-of-house flow path 17. The second on-off valve 15B is located on the downstream side of the branch point of the third tank flow path 20.

Further, first and second open / close valves 17A and 17B are provided in the out-house flow path 17. The first on-off valve 17A is located on the upstream side of the branch point of the first tank flow path 18 and the second on-off valve 17B is located on the downstream side of the branch point.

<Control section>

The control unit 7 is a device for controlling the carbon dioxide application device 1. [ The control section 7 may be constituted by, for example, a computer. Specifically, the control unit 7 controls the operation and stop of the blower 5, and the opening and closing of the opening / closing valves provided in the flow path. The control unit 7 also receives measurement signals from the in-flow concentration sensor 15C and the in-house concentration sensor 100A.

The concentration sensor 15C in the flow path is a concentration sensor for measuring the concentration of carbon dioxide supplied from the adsorption tank 6 in the flow path. The concentration sensor 15C in the flow path is provided on the downstream side of the second on-off valve 15B in the in-house flow path 15 as an example. On the other hand, the in-house concentration sensor 100A is a concentration sensor for measuring the concentration of carbon dioxide in the agricultural house 100. [ The in-house concentration sensor 100A is installed in the agricultural house 100.

 [2. process]

The carbon dioxide application device 1 performs an adsorption process for recovering carbon dioxide from the combustion exhaust gas and a process for realizing the application process for supplying carbon dioxide into the agricultural house 100.

<Adsorption Process>

The adsorption process is carried out mainly by operating the blower 5 during the combustion in the combustion apparatus 2 at night. The combustion of the combustion apparatus 2 may also be started by the control unit 7. [ In the adsorption step, the opening / closing valve 12A of the cooling air passage 12, the opening / closing valve 14A of the working air passage 14, the opening / closing valve 16A of the auxiliary passage 16, Closing valve 15B and the first opening and closing valve 17A of the outside passage 17 are closed and the first opening and closing valve 15A of the inside passage 15 and the second opening and closing valve 17A of the outside passage 17 are closed, The valve 17B is opened.

The combustion exhaust gas generated in the combustion apparatus 2 sequentially passes through the purifying section 8 and the adsorption tank 6 by the operation of the blower 5 and flows out to the outside of the agricultural house 100. [ When the combustion exhaust gas passes through the purifying section 8, harmful substances are removed from the combustion exhaust gas. Further, when the combustion exhaust gas passes through the adsorption tank 6, the carbon dioxide contained in the combustion exhaust gas is adsorbed on the adsorbent.

<Application process>

The application process is carried out to supply carbon dioxide into the agricultural house 100 during the daytime. In the application process, a main mode, a sub mode, and a stop mode are provided. In the main mode, carbon dioxide is supplied from the adsorption tank 6, and in the submode, carbon dioxide is supplied from the auxiliary device 9. The main and sub modes are executed by operating the blower 5. In the stop mode, the blower 5 is stopped, and the supply of carbon dioxide into the agricultural house 100 is stopped.

In the main mode, the opening / closing valve 12A of the cooling air passage 12, the opening / closing valve 16A of the auxiliary passage 16, the first opening / closing valve 15A of the inside passage 15, The second opening / closing valve 17B of the indoor air passage 15 is closed, and the first opening / closing valve 17B of the indoor air passage 14 is closed, The valve 17A is opened.

Thus, by the operation of the blower 5, the test air flows from the test air passage 14 and is fed into the agricultural house 100. Specifically, the test air passes through the adsorption tank 6 and the purifier 8 in order and flows into the agricultural house 100. When the test air passes through the adsorption tank 6, the carbon dioxide adsorbed on the adsorbent flows out, and the outflowed carbon dioxide flows into the agricultural house 100 together with the test air.

On the other hand, for example, when the auxiliary test apparatus 9 is configured as a combustion apparatus, the control unit 7 starts the combustion of the auxiliary test apparatus 9, for example, before or during the transition to the sub mode . In the sub mode, the opening / closing valve 12A of the cooling air passage 12, the opening / closing valve 14A of the working air passage 14, and the first and second opening / closing valves 17A and 17B Closing valve 16A of the auxiliary flow path 16 and the first and second open / close valves 15A and 15B of the in-house flow path 15 are opened.

Thus, by the operation of the blower 5, the carbon dioxide supplied from the auxiliary testing device 9 is fed into the agricultural house 100. Specifically, the carbon dioxide passes through the auxiliary flow path 16 and the in-house flow path 15 in succession and flows into the agricultural house 100.

Further, for example, when the auxiliary test apparatus 9 is configured as a carbon dioxide bomb, the control unit 7 opens the valve of the carbon dioxide bomb at the transition to the sub mode. At this time, the opening / closing valve 12A of the cooling air passage 12 and the first and second opening / closing valves 17A and 17B of the outside passage 17 are closed and the open / Closing valve 16A of the auxiliary flow path 16 and the first and second opening and closing valves 15A and 15B of the in-house flow path 15 are opened.

Thus, the operation of the blower 5 causes the pilot air introduced from the pilot air passage 14 and the carbon dioxide supplied from the auxiliary pilot 9 to be fed into the agricultural house 100. Specifically, the carbon dioxide is diluted to an appropriate concentration by the use air, passes through the in-house flow path 15, and flows into the agricultural house 100. As a result, the supply of carbon dioxide locally to the agricultural house 100 can be suppressed, and at the same time, the carbon dioxide at an appropriate concentration can be supplied into the agricultural house 100.

<CO ₂ supply processing>

The control unit 7 periodically starts the CO ₂ supply process of FIG. 2 in the application process. Thereby, the processing of each mode described above is realized. In addition, the main mode flag is used in the supply process, but the main mode flag is set to zero at the time of resetting the carbon dioxide application device 1. [

In S200, the concentration of carbon dioxide (hereinafter referred to as concentration in the house) in the agricultural house 100 is measured or estimated based on the measurement signal from the intra-house concentration sensor 100A. In the main mode, the concentration in the house may correspond to the concentration of carbon dioxide supplied from the adsorption tank 6 into the agricultural house 100. In the submode, the concentration in the house may correspond to the concentration of carbon dioxide supplied from the auxiliary examination device 9 into the agricultural house 100. [ Instead of the in-house concentration sensor 100A, the concentration in the house may be measured or estimated based on the measurement signal from the in-flow concentration sensor 15C. When the concentration in the house is equal to or less than the first threshold value (e.g., 500 ppm) (S200: YES), the process proceeds to S205. On the other hand, if not (S200: NO), the process proceeds to S240.

In S205, it is determined whether the main mode flag is 1 or not. If the determination is affirmative (S205: YES), the process proceeds to S220. If the determination is negative (S205: NO), the process proceeds to S210.

In S210, the main mode is started. That is, the supply of carbon dioxide from the adsorption tank 6 into the agricultural house 100 is started. Then, in the succeeding step S215, the main mode flag is set to 1, and then the present process is terminated.

In S220, it is determined whether or not t seconds (for example, 10 seconds) has elapsed after the start of the main mode. If the determination is affirmative (S220: YES), the process proceeds to S225. If the determination is negative (S220: NO), the process proceeds to S235.

On the other hand, at S225, the concentration of carbon dioxide (hereinafter referred to as the concentration in the flow path) on the downstream side of the second opening / closing valve 15B of the in-house flow path 15, based on the measurement signal from the in- Is measured. The concentration of carbon dioxide (hereinafter referred to as supply concentration) supplied from the adsorption tank 6 into the agricultural house 100 is measured or estimated by the concentration in the flow path. Instead of the in-flow concentration sensor 15C, the supply concentration may be measured or estimated based on the measurement signal from the in-house concentration sensor 100A. Then, it is determined whether or not the measured or estimated supply concentration falls below a predetermined threshold value. Specifically, when the concentration in the flow path is equal to or less than the second threshold value (1.0% as an example) (S225: YES), the process proceeds to S230. When the concentration in the flow path is the second threshold value, the concentration in the house may be 300 ppm or less as an example. On the other hand, if the concentration in the flow path is larger than the second threshold value (S225: "NO"), the process proceeds to S235.

Here, the second threshold value is lower than the first threshold value. It is also conceivable to measure or estimate the supply concentration from the adsorption tank 6 based on the concentration in the house instead of the concentration in the flow path. However, until the change in the supply concentration is reflected in the concentration in the flow passage, there is a larger delay until the decrease in the supply concentration is reflected in the concentration in the house. In order to measure or estimate the supply concentration more quickly, the supply concentration is measured or estimated based on the concentration in the flow passage.

In S230, the sub mode is started. That is, the supply of carbon dioxide from the auxiliary examination device 9 into the agricultural house 100 is started. Then, the present process is terminated. When the auxiliary testing device 9 is configured as a combustion device, after a lapse of a predetermined delay period (for example, 30 seconds) after the start of combustion of the auxiliary testing device 9, (5) may be started. In this delay period, the opening / closing valve 14A of the working air passage 14 may be opened. As a result, carbon monoxide generated at the start of combustion of the auxiliary testing device 9 is released into the atmosphere, and the carbon monoxide can be prevented from flowing into the agricultural house 100.

On the other hand, in S235, the main mode continues and this process ends.

On the other hand, when the concentration in the house is larger than the first threshold value, the stop mode is started in S240. That is, the supply of the carbon dioxide from the adsorption tank 6 and the auxiliary testing device 9 is stopped. More specifically, the blower 5 is stopped. Further, for example, when the auxiliary testing device 9 is configured as a combustion device, the combustion of the auxiliary testing device 9 may be stopped. Further, for example, when the auxiliary testing device 9 is configured as a carbon dioxide bomb, the valve of the carbon dioxide bomb is closed. At this time, the plurality of open / close valves 12A, 14A, 15A, 15B, 16A, 17A, 17B of the flow path may be closed. Subsequently, in the following S245, the main mode flag is set to 0, and the present process is terminated.

In the application process, the concentration in the house fluctuates as indicated by the graph of Fig. 3 by the CO ₂ supply process. That is, when the concentration in the house decreases during the stop mode in which no carbon dioxide is supplied into the agricultural house 100 and the concentration in the house becomes equal to or less than the first threshold at time T0, an affirmative determination is made in S200 of the CO ₂ supply process . Subsequently, in S205, the value of the main mode flag is determined.

When the concentration in the house becomes the first threshold value or less for the first time in the stop mode, the main mode flag is zero. Thereby, the main mode is started in S210, and carbon dioxide is supplied from the adsorption tank 6 into the agricultural house 100. Subsequently, 1 is set to the main mode flag in the subsequent S215.

When the main mode flag is 1 and the concentration in the house is determined to be equal to or less than the first threshold value in S200, an affirmative determination is made in S205. Thereby, the processing progresses to S220, and it is determined whether or not t seconds have elapsed after the transition to the main mode. If a negative determination is made in S220, the main mode continues and the value of the main mode flag is maintained at 1. [ On the other hand, when an affirmative determination is made in S220, the process proceeds to S225, and it is determined whether or not the concentration in the flow path is equal to or lower than the second threshold value. If an affirmative determination is made in S225, the main mode continues and the value of the main mode flag is maintained at 1. On the other hand, when an affirmative determination is made in S225, the main mode shifts to the sub mode. Also at this time, the value of the main mode flag is held at 1. [

In the case of the stop mode, the main mode and the sub mode, when the concentration in the house exceeds the first threshold value, the stop mode is started in S240. Then, the main mode flag is set to 0 in S245.

T0, T2, T4 and T6 in Fig. 3 show the timing when the concentration in the house exceeds the first threshold value, and the state in which the concentration in the house changes to the first threshold value or less. At this timing, the main mode is started. Conversely, T1, T3, and T5 show the timing at which the concentration in the house changes from the state where the concentration in the house is equal to or less than the first threshold value to the state in which the concentration in the house exceeds the first threshold value. At this timing, the stop mode is started.

The description of the second threshold value in Fig. 3 indicates the target of the concentration in the house when the concentration in the flow path becomes the second threshold value. The description of the first threshold value in Fig. 4 indicates the target of the concentration in the flow path when the concentration in the house becomes the first threshold value.

Thereafter, it is assumed that the concentration in the house decreases during the stop mode, and an affirmative determination is made at S200 at time T6. It is assumed that the time T7 has elapsed after t seconds have elapsed since the main mode was started in S210. At this time, as shown in Fig. 4, the concentration in the flow path becomes equal to or less than the second threshold value, and an affirmative determination is made in S225. That is, the remaining amount of carbon dioxide stored in the adsorption tank 6 is reduced, and a sufficient amount of carbon dioxide is not supplied from the adsorption tank 6. At this time, S230 of the CO ₂ supply process is executed, and the sub mode is entered. That is, carbon dioxide is supplied from the auxiliary examination device 9 into the agricultural house 100. Thereafter, when the concentration in the house rises and it is determined at S28 that the concentration in the house exceeds the first threshold value at time T8, S240 of the CO ₂ supply process is executed and the mode shifts to the stop mode.

Further, when the auxiliary testing device 9 is configured as a combustion device, the inside of the agricultural house 100 may be heated in the auxiliary testing device 9. This makes it possible to effectively utilize energy. Also, at this time, the carbon dioxide application device 1 may recover the carbon dioxide generated from the auxiliary application device 9. Specifically, the control unit 7 controls the opening / closing valve 12A of the cooling air passage 12, the opening / closing valve 14A of the working air passage 14, the second opening / closing valve Closing valve 17A of the auxiliary flow path 16 and the first opening and closing valve 15A of the in-house flow path 15 are closed, And the second on-off valve 17B of the out-house flow path 17 may be opened. As a result, when the blower 5 is operated, the carbon dioxide supplied from the auxiliary testing device 9 is sequentially pressure-fed to the purifying section 8 and the adsorption tank 6. Thus, the carbon dioxide is adsorbed to the adsorbent of the adsorption tank 6.

The carbon dioxide may be recovered while supplying carbon dioxide from the auxiliary testing device 9 into the agricultural house 100. That is, the control unit 7 controls the opening / closing valve 12A of the cooling air passage 12, the opening / closing valve 14A of the working air passage 14, the first opening / closing valve 15A of the in- Closing valve 17B of the out-of-house flow path 17 and the second on-off valve 15B of the in-house flow path 15 and the open / close valve 16A of the in- The first opening / closing valve 17A of the outside passage 17 may be opened.

Thus, when the blower 5 is operated, the carbon dioxide supplied from the auxiliary testing device 9 passes through the adsorption tank 6 and the purifying section 8, and then flows into the agricultural house 100. As a result, carbon dioxide can be adsorbed on the adsorbent of the adsorption tank 6. When the carbon dioxide adsorbed on the adsorbent reaches the maximum capacity, the carbon dioxide passes through the adsorption tank 6 and flows into the agricultural house 100. Therefore, the carbon dioxide can be recovered while supplying carbon dioxide from the auxiliary testing device 9 into the agricultural house 100.

 [3. effect]

(1) According to the above embodiment, when the remaining amount of carbon dioxide stored in the adsorption tank 6 is reduced and it becomes impossible to supply a sufficient amount of carbon dioxide from the adsorption tank 6 into the agricultural house 100, From the device 9, carbon dioxide is supplied into the agricultural house 100. Thus, even when a sufficient amount of carbon dioxide is not stored in the adsorption tank 6, a sufficient amount of carbon dioxide can be supplied into the agricultural house 100.

The supply of the carbon dioxide from the adsorption tank 6 and the auxiliary testing device 9 is performed using the blower 5. [ Thus, the supply of carbon dioxide locally to the agricultural house 100 can be suppressed.

Therefore, it is possible to appropriately supply carbon dioxide into the agricultural house 100.

(2) Further, as a result of supplying carbon dioxide into the agricultural house 100 from the auxiliary testing device 9, when the agricultural house 100 reaches a proper carbon dioxide concentration, the supply of carbon dioxide from the auxiliary testing device 9 is stopped . As a result, excessive operation of the assist device 9 can be suppressed and carbon dioxide in the agricultural house 100 can be maintained at an appropriate concentration.

 [4. Other Embodiments]

(1) In the above embodiment, the flow path concentration sensor 15C is provided on the downstream side of the second on-off valve 15B in the in-house flow path 15. However, the concentration sensor 15C in the flow path may be provided at another position in the flow path. Specifically, the concentration sensor 15C in the flow path is disposed in the vicinity of a branch point of the in-house flow path 15 with respect to the third tank flow path 20, the third tank flow path 20, (19) or the like.

 (2) The functions of one component in the above embodiment may be shared among a plurality of components, or the functions of a plurality of components may be exerted on one component. Note that some of the configurations of the above-described embodiments may be omitted as long as the problems can be solved. Further, all the forms included in the technical idea specified from the wording of the claims are the embodiments of the present disclosure.

 [5. Correspondence with Claim Claims]

The control unit 7 and the plurality of opening / closing valves 12A, 14A, 15A, 15B, 16A, 17A, 17B in the above embodiment correspond to an example of the supply control unit. The flow path including at least the in-house flow path 15 in the carbon dioxide application device 1 corresponds to an example of the carbon dioxide supply flow path. The steps S200 and S225 of the CO ₂ supply processing correspond to an example of the concentration detecting unit. The first threshold value corresponds to an example of the B threshold value and the C threshold value, and the second threshold value corresponds to an example of the A threshold value.

Claims (9)

A carbon dioxide application device as a main application device configured to supply carbon dioxide contained in a combustion exhaust gas into an agricultural house,
An adsorption tank in which an adsorbent configured to adsorb carbon dioxide in the combustion exhaust gas is disposed;
A device installed in the carbon dioxide supply passage and configured to discharge the gas in the carbon dioxide supply passage;
A supply control unit configured to supply carbon dioxide adsorbed by the adsorbent of the adsorption tank into the agricultural house through the carbon dioxide feed channel;
And a concentration detector configured to measure or estimate the concentration of carbon dioxide supplied from the adsorption tank into the agricultural house,
Wherein the supply control unit is configured to supply the carbon dioxide to the agricultural house through the carbon dioxide supply channel when the concentration of the carbon dioxide measured or estimated by the concentration detector falls below a predetermined threshold A when the carbon dioxide is supplied from the adsorption tank into the agricultural house, Wherein the carbon dioxide is supplied from the auxiliary test apparatus to the agricultural house. The method according to claim 1,
The concentration detecting section is further configured to measure or estimate the concentration of carbon dioxide supplied from the auxiliary testing apparatus into the agricultural house,
Wherein the supply control unit is configured to control the concentration of carbon dioxide supplied from the auxiliary testing device measured or estimated by the concentration detecting unit to a predetermined value B different from the A threshold value when carbon dioxide is supplied into the agricultural house from the auxiliary testing device And stops the supply of the carbon dioxide from the auxiliary test apparatus when the temperature exceeds the threshold value. 3. The method according to claim 1 or 2,
Wherein the concentration detecting section measures or estimates the concentration of carbon dioxide supplied into the agricultural house based on the concentration of carbon dioxide in the carbon dioxide supply passage. 3. The method according to claim 1 or 2,
Wherein the concentration detecting unit measures or estimates the concentration of carbon dioxide supplied into the agricultural house based on the concentration of carbon dioxide in the agricultural house. The method according to claim 1,
The concentration detecting section is further configured to measure or estimate the concentration of carbon dioxide in the agricultural house,
If the concentration of carbon dioxide in the agricultural house measured or estimated by the concentration detecting unit exceeds the C threshold value determined differently from the A threshold value while the carbon dioxide is being supplied into the agricultural house, And stopping the supply of carbon dioxide into the first tank. 6. The method of claim 5,
Wherein the supply control unit stops the supply of the carbon dioxide to the agricultural house through the carbon dioxide supply passage when the concentration of the carbon dioxide in the agricultural house measured or estimated by the concentration detector falls below the C threshold value, Wherein the apparatus is configured to supply carbon dioxide from the adsorption tank into the agricultural house. 7. The method according to any one of claims 1 to 6,
Wherein the auxiliary test apparatus is configured as an apparatus for heating the inside of the agricultural house while burning fuel to generate carbon dioxide. 8. The method according to any one of claims 1 to 7,
The auxiliary test apparatus is configured as an apparatus for generating carbon dioxide by burning fuel,
Wherein the supply control unit causes the combustion exhaust gas generated by the combustion in the auxiliary test apparatus to flow down to the adsorption tank through the carbon dioxide supply flow channel by the apparatus so that carbon dioxide contained in the combustion exhaust gas is supplied to the adsorbent Wherein the carbon dioxide adsorbing device is configured to adsorb carbon dioxide. 7. The method according to any one of claims 1 to 6,
The auxiliary test apparatus is configured as a bomb storing carbon dioxide,
Wherein the supply control section is configured to supply, into the agricultural house, a diluted air of carbon dioxide emitted from the auxiliary test apparatus.

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