JP2008206475A - Method for supplying carbon dioxide to plant cultivation greenhouse, cogeneration apparatus, and plant cultivation greenhouse - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for supplying carbon dioxide to a plant cultivation greenhouse, which is intended for safety of a worker through introducing a proper amount of carbon dioxide into the greenhouse, separating noxious gas contained in exhaust gas, such as carbon monoxide, when supplying carbon dioxide to the plant cultivation greenhouse to which each kind of energy such as heat and electricity and carbon dioxide are supplied by a cogeneration apparatus. <P>SOLUTION: This plant cultivation greenhouse (2) is such that energy including heat or electricity is supplied into a greenhouse body (1) by a cogeneration apparatus (2) which is provided at the greenhouse body (1). An exhaust gas storing bag (3) which stores exhaust gas of a motor of the cogeneration apparatus (2) is set in the greenhouse body (1). The exhaust gas storing bag (3) has a supply pipe (32) which supplies gas at the lower part of the exhaust gas storing bag (3) into the greenhouse body (1), and a discharge pipe (30) which discharges gas at the upper part of the exhaust gas storing bag (3) to the outside of the greenhouse body (1). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a carbon dioxide gas supply method, a cogeneration apparatus, and a plant cultivation house in a plant cultivation house.
Specifically, in order to activate the plants in the plant cultivation house, carbon dioxide gas is supplied by introducing exhaust gas into the house, so that a sufficient amount of heat can be supplied to warm the house. In addition, the present invention relates to a material that equalizes the concentration of carbon dioxide gas in the house so that no deviation occurs. Furthermore, when introducing carbon dioxide gas into the house, it is possible to introduce an appropriate amount into the house separately from toxic gases such as carbon monoxide contained in the exhaust gas, thereby ensuring worker safety. At the same time, it relates to the one that can improve the thermal efficiency of the whole house.

  Energy saving of plant cultivation houses for growing various plants such as vegetables and flowers has become an important issue in terms of both cost reduction and environmental conservation, and various efforts have been made. For example, those that use the heat of groundwater as a heat source to heat the inside of the house, those that effectively use the exhaust heat of the house heater in a heat exchanger, or a double wall on the entire wall of the house to provide an air layer and provide a heat insulation effect Some of them are known to improve, but none of them have been able to demonstrate sufficient performance from the viewpoint of cost effectiveness, and have not yet been put into practical use and spread.

  By the way, in recent years, cogeneration (also referred to as cogeneration) is an energy-saving technology that has attracted particular attention. Cogeneration is an engine that uses an internal combustion engine or the like as a prime mover to extract motive power, electric power, heat, and cold, and to make effective use of each to improve overall energy efficiency. For example, office buildings, hospitals, hotels, It is also being introduced as a source of energy in relatively small facilities such as sports facilities and agricultural facilities. An example of the agricultural facility is a plant cultivation house described in Patent Document 1, for example.

  The house for plant cultivation of patent documents 1 is operated using gas fuel, the cogeneration facility which produces heat and electric power, and the environment suitable for cultivation of a plant in the medium in a house using the produced heat Medium improvement means to improve the power, electric lighting control means for artificially controlling the day length reaction by illuminating the medium using electric power, and carbon dioxide gas for activating the plant in the house And an energy supply device provided with an appropriate supply means. Thereby, the management of the culture medium suitable for the plant cultivated in the house and the growth of the plant can be performed efficiently.

JP2007-20524

However, the plant cultivation house of Patent Document 1 has the following problems.
First, the heat produced by the cogeneration facility is mainly used to warm the medium, and does not directly warm the interior of the house. For this reason, in order to manage the temperature inside the house, heat use efficiency is poor, the amount of heat supplied is insufficient, and a heating device such as a gas heater must be prepared separately.

  Further, since the air in the house is not circulated, the temperature distribution is likely to be uneven, which is not preferable in terms of plant growth environment and worker's work environment. Furthermore, carbon dioxide gas contained in the exhaust gas supplied as appropriate is heavier than other gases and tends to accumulate at the bottom of the house. For this reason, even if the time zone and time when the exhaust gas is introduced are controlled by the control device, if there is a bias in the concentration of carbon dioxide gas in the house, there is a risk of lack of oxygen for the worker, High risk.

In the house for plant cultivation, in order to introduce carbon dioxide gas (CO ₂ ) into the house, a part of exhaust gas itself discharged from a gas engine or a gas turbine is put into the house. However, the exhaust gas contains a toxic gas such as carbon monoxide gas (CO) in addition to the carbon dioxide gas. For this reason, it is not preferable to introduce the exhaust gas into the substantially sealed house as it is in terms of safety of the operator.
Moreover, the structure of the house itself does not have a special structure that enhances heat insulation, but is a very general structure, so heat is dissipated to the outside air actively from the entire house, and heat is generated. It is not easy to escape and thermal efficiency is not good.

  Therefore, an object of the present invention is to supply carbon dioxide gas by introducing exhaust gas into the house for the activation of the plant in the plant cultivation house, and there is a sufficient amount of heat to warm the house. In addition to being able to supply, it is to equalize the concentration of carbon dioxide gas in the house so that there is no bias, thereby improving the risk of working environment such as lack of oxygen.

  Another object of the present invention is to introduce carbon dioxide gas into the house separately from toxic gases such as carbon monoxide contained in the exhaust gas when introducing carbon dioxide gas that activates the plants in the house. It is to ensure the safety of workers by introducing an appropriate amount into the interior.

  Another object of the present invention is to reduce heat dissipation from the house by providing a gas layer that provides heat insulation in a place where heat dissipation from the inside of the house to the outside air is easily performed, in addition to the purpose of the previous stage. It is to be able to improve the thermal efficiency of the whole house.

Means taken by the present invention to solve the above problems are as follows.
The present invention
Air containing heat generated in the cogeneration system and exhaust gas exhausted from the cogeneration system prime mover are introduced into the house body, and the air and exhaust gas containing the introduced heat are introduced into the house body together with the air inside the house body. Forcibly circulates in the circulation path of the plant, heats the circulating gas with a heat exchanger that uses the heat of the exhaust gas as a heat source, and supplies carbon dioxide gas for plant activation into the house body. It is the supply method of the carbon dioxide gas in the house.

The present invention
Air containing heat generated in the cogeneration system and exhaust gas exhausted from the cogeneration system prime mover are introduced into the house body, and the air and exhaust gas containing the introduced heat are introduced into the house body together with the air inside the house body. Cogeneration system that forcibly circulates the gas in the circulation path and heats the circulating gas with a heat exchanger that uses the heat of the exhaust gas as a heat source, and supplies carbon dioxide gas for plant activation into the house body Because
An air flow passage, and in the air flow passage,
Prime mover,
A generator driven by the prime mover;
A blower that is driven by electric power generated by the generator and circulates the gas in the house body;
A heat exchanger that heats the circulating gas using the heat of the exhaust gas of the prime mover as a heat source;
Means for supplying carbon dioxide gas in the house body by discharging exhaust gas of the prime mover;
This is a cogeneration device.

The present invention
Air containing heat generated in the cogeneration system and exhaust gas exhausted from the cogeneration system prime mover are introduced into the house body, and the air and exhaust gas containing the introduced heat are introduced into the house body together with the air inside the house body. The cogeneration system forcibly circulates in the circulation path, and heats the circulating gas with a heat exchanger that uses the heat of the exhaust gas as a heat source, and supplies carbon dioxide gas for plant activation into the house body. A plant cultivation house using a device,
The plant cultivation house is
A house main body and a cogeneration device provided in the house main body, and the cogeneration device supplies energy including heat or / and electricity to the house main body,
The cogeneration apparatus includes an air flow passage,
In the air flow passage,
Prime mover,
A generator driven by the prime mover;
A blower that is driven by electric power generated by the generator and circulates the gas in the house body;
A heat exchanger that heats the circulating gas using the heat of the exhaust gas of the prime mover as a heat source;
Means for supplying carbon dioxide gas in the house body by discharging exhaust gas of the prime mover;
This is a plant cultivation house.

The present invention
Air containing heat generated in the cogeneration system and exhaust gas exhausted from the cogeneration system prime mover are introduced into the house body, and the air and exhaust gas containing the introduced heat are introduced into the house body together with the air inside the house body. The cogeneration system forcibly circulates in the circulation path, and heats the circulating gas with a heat exchanger that uses the heat of the exhaust gas as a heat source, and supplies carbon dioxide gas for plant activation into the house body. A plant cultivation house using a device,
The plant cultivation house is
A house main body and a cogeneration device provided in the house main body, and the cogeneration device supplies energy including heat or / and electricity to the house main body,
The cogeneration device comprises an air flow passage;
In the air flow passage,
Prime mover,
A generator driven by the prime mover;
A blower that is driven by electric power generated by the generator and circulates the gas in the house body;
A heat exchanger that heats the circulating gas using the heat of the exhaust gas of the prime mover as a heat source;
With
An exhaust gas storage part for storing the exhaust gas of the prime mover is provided in the house main body, and a gas supply means for supplying the lower gas in the exhaust gas storage part into the house main body in the exhaust gas storage part And the house for plant cultivation provided with the gas discharge means which discharges | emits the gas of the upper part in an exhaust-gas storage part out of a house main body.

The plant cultivation house of the present invention is
More preferably, the exhaust gas reservoir is provided on the ceiling of the house body.

The plant cultivation house of the present invention is
More preferably, the exhaust gas reservoir is a bag having airtightness and flexibility.

(Function)
The effect | action of the house for plant cultivation of this invention is demonstrated. Here, the constituent elements used in the description are assigned in correspondence with the reference numerals given to the respective parts in the embodiments described later. These reference numerals are the same as the reference numerals described in the claims of the claims. Similarly, it is only for the purpose of facilitating understanding of the contents, and the meaning of each component is not limited to the above-described parts.

When the prime mover (21) of the cogeneration device (2) is started, the generator (22) is driven to generate power. With this electric power, the blower (23) is driven and blown to the heat exchanger (24).
High-temperature exhaust gas generated by the prime mover (21) is sent to the heat exchanger (24), and the circulating gas passing through the heat exchanger (24) is heated. The circulating gas is also warmed mainly by heat produced by the prime mover (21) and the generator (22). Also, the exhaust gas can be discharged directly into the house body (1) after passing through the heat exchanger (24) or without passing through the heat exchanger (24). Gas can be supplied into the house body (1).

  In the case of a plant cultivation house equipped with an exhaust gas storage section (3), the exhaust gas that has passed through the heat exchanger (24) is sent to the exhaust gas storage section (3) and stored. Thus, the exhaust gas discharged from the prime mover (21) is not directly discharged into the house body (1).

  The circulating gas heated by the heat exchanger (24) is further heated by an auxiliary burner or the like as necessary. The circulating gas thus heated is agitated while circulating around the circulation path in the house body (1). At this time, each gas component contained in the circulating gas is dispersed almost evenly, and for example, it is possible to prevent a specific gas component such as carbon dioxide gas from being biased in the house body.

  Then, the circulating gas enters the blower (23) in a state where the temperature is lowered due to heat dissipation to the outside. The heat dissipated from the surfaces of the prime mover (21) and the generator (22) is taken into the circulating gas, and the circulating gas is heated. As the circulating gas is circulated in this manner, the operation and stop of the cogeneration apparatus (2) are appropriately controlled, so that the temperature in the house body (1) is kept at an appropriate temperature.

  Further, inside the exhaust gas storage section (3), the gas contained in the exhaust gas tends to be divided into layers in the vertical direction due to the difference in specific gravity. Carbon dioxide forms a lower layer because of its relatively high specific gravity. In addition, carbon monoxide, nitrogen, oxygen, and the like form an upper layer because of their relatively low specific gravity. For this reason, the gas supply means (32) for supplying the lower gas in the exhaust gas reservoir (3) into the house body (1), for example, into the house body (1) during the time zone required for plant cultivation. Carbon dioxide gas can be discharged efficiently. In addition, the gas exhaust means (30) for exhausting the upper gas in the exhaust gas reservoir (3) to the outside of the house main body (1) efficiently removes other gas components including toxic carbon monoxide gas. It can be discharged outside (1).

  In this way, the exhaust gas discharged from the prime mover (21) is temporarily stored in the exhaust gas storage section (3), and the discharge is controlled by the gas supply means (32) and the gas discharge means (30). When introducing carbon dioxide gas to help the growth of cultivated plants into the house body (1), it is mainly separated from other gas components such as toxic carbon monoxide contained in the exhaust gas. Since an appropriate amount of carbon gas can be introduced, worker safety can be ensured.

In addition, since the circulating gas that is heated in the house body (1) does not always move regularly, the amount of heat retained by the circulating gas tends to gather high-temperature gases. There is a tendency to become biased toward the ceiling of the house body (1). Moreover, the amount of heat dissipated to the outside air tends to increase in the portion where the amount of heat held is large.
Therefore, according to the exhaust gas reservoir (3) provided in the ceiling of the house body (1), the exhaust gas contained in the exhaust gas reservoir (3) becomes a gas layer. Since the heat insulating effect is exhibited, heat dissipation to the outside air at the ceiling portion where a large amount of heat is retained in the space where the circulating gas circulates is prevented. Thereby, the thermal efficiency as the whole house improves.

(A) In the present invention, in order to activate plants in a plant cultivation house, carbon dioxide gas is supplied by introducing exhaust gas into the house body, and heat and exhaust generated in the cogeneration apparatus By introducing the gas together, a sufficient amount of heat for warming the inside of the house can be supplied. In addition, since the air in the house containing exhaust gas circulates in the circulation path and is agitated, each gas component is evenly dispersed, and the concentration of carbon dioxide gas is not biased. The danger of the working environment can be improved.

(B) The house for plant cultivation of the present invention can temporarily store the exhaust gas discharged from the prime mover of the cogeneration apparatus in the exhaust gas storage unit, and control the discharge by the gas supply means and the gas discharge means. As a result, when introducing the carbon dioxide gas that activates the plants in the house, separate from other gas components such as toxic carbon monoxide contained in the exhaust gas, Since an appropriate amount can be introduced to the operator, the safety of the operator can be improved.

(C) The house for plant cultivation in which the exhaust gas storage part is provided in the ceiling part of the house body exhibits the heat insulation effect by the exhaust gas inside the exhaust gas storage part becoming a gas layer, and the circulating gas circulates Heat dissipation to the outside air at the ceiling where the amount of heat held is large in the space that is being prevented. Thereby, the thermal efficiency as the whole house improves.

(D) The plant cultivation house in which the exhaust gas reservoir is an airtight and flexible bag body, even when the operation of the cogeneration apparatus is stopped and the supply of exhaust gas in the bag body is stopped The gas is discharged automatically by the means and the gas discharge means by shrinking and deforming the bag body with its own weight, so that stable supply of carbon dioxide into the house body and house of other gas components Stable discharge to the outside of the main unit becomes possible.

  The present invention will be described in detail based on the embodiments shown in the drawings.

FIG. 1 is a partially sectional explanatory view in plan view showing a first embodiment of a plant cultivation house,
FIG. 2 is a front sectional view of a plant cultivation house,
FIG. 3 is an enlarged side view longitudinal sectional explanatory view of the plant cultivation house.

  The plant cultivation house A1 includes a house main body 1, a cogeneration apparatus 2 installed in the house main body 1, and an exhaust gas storage bag 3 provided in a ceiling portion of the house main body 1. The plant cultivation house A1 is used for plant cultivation for growing plants such as vegetables and flowers in which energy including heat or electricity and carbon dioxide gas that aids plant growth are supplied into the house body 1 by the cogeneration apparatus 2. It is a house. The house for plant cultivation of the present invention includes not only for agriculture and horticulture but also for example a house in a botanical garden.

The house body 1 has a structure in which a synthetic resin sheet 11 is stretched around a framework 10. The frame 10 is provided with a metal support line 12 at a predetermined height in the horizontal direction. As shown in FIG. 1, the support line 12 is stretched in a zigzag manner over the entire length of the house body 1.
The exhaust gas storage bag 3 is placed on the support line 12 and accommodated in the accommodation space 13 above the support line 12. The lower side of the support line 12 is a growing space 14 for growing plants such as vegetables and flowers. Moreover, the lighting fixture 15 is provided in the same height as the support line 12, as shown in FIG.

  The exhaust gas storage bag 3 is a bag made of a synthetic resin sheet having airtightness and flexibility (or deformability). The exhaust gas storage bag 3 can be formed of other flexible materials such as cloth as long as it has necessary and sufficient airtightness and strength. The size of the exhaust gas storage bag 3 is a size that substantially fills the accommodation space 13 when it swells over substantially the entire length of the accommodation space 13.

  On the upper side of the exhaust gas storage bag 3, a discharge pipe 30 serving as a gas discharge means is provided. The discharge pipe 30 is attached through the upper sheet of the exhaust gas storage bag 3, and the tip side with the discharge port is slidably passed through the upper part of the sheet 11 of the house body 1 and exposed to the outside. It is. Note that the front side of the discharge pipe 30 is bent in a hook shape to prevent the discharge pipe 30 from falling into the housing space 13 when the exhaust gas storage bag 3 is deformed in a reduced size.

  Further, an air supply pipe 31 and a supply pipe 32 which is a gas supply means are connected to the lower side of the exhaust gas storage bag 3. The air supply pipe 31 is led out from the heat exchanger 24 of the cogeneration apparatus 2 described later, and sends the exhaust gas of the prime mover 21 to the exhaust gas storage bag 3 (see also FIG. 4 together). The supply pipe 32 is extended to the inlet side of the blower 23 of the cogeneration apparatus 2. The supply pipe 32 is provided with an electromagnetic valve 33 that can perform open / close control.

FIG. 4 is a front view explanatory diagram of a cogeneration apparatus used for a plant cultivation house,
FIG. 5 is an explanatory diagram of the engine speed control mechanism of the cogeneration apparatus.
FIG. 6 is a wiring diagram of the main circuit of the cogeneration apparatus.

  As shown in FIGS. 1 and 2, the cogeneration apparatus 2 is installed on the ground in the middle of the width direction of the house body 1, near one end in the longitudinal direction of the house body 1.

Refer mainly to FIG.
The cogeneration apparatus 2 is driven by the frame 20, the prime mover 21, the generator 22 driven by the prime mover 21, the electric power generated by the generator 22, the blower 23 that circulates the gas in the house body, and the exhaust gas of the prime mover 21. A heat exchanger 24 for heating the circulating gas using heat as a heat source and an auxiliary burner 25 for heating the circulating gas in an auxiliary manner are provided.

  The outer shape of the frame 20 is a rectangular parallelepiped shape. Casters 201 for movement are provided at the four corners of the lower surface of the frame 20. The frame 20 is provided with an intermediate shelf 202 at substantially the middle in the height direction. In the upper part of the intermediate shelf 202, a wind tunnel 203 whose side surfaces and upper surface are surrounded by wall plates (not shown) over almost the entire length of the frame 20 (in FIG. 4, a part of the suction side on the left side is omitted for convenience of showing the inside. Is provided). Inside the wind tunnel 203, that is, in the same air flow path (included in the circulation path), a generator 22, a prime mover 21, a blower 23, and a heat exchanger 24 are provided in order from the suction side.

  The prime mover 21 is a diesel engine that uses light oil as a fuel, but is not limited to this, and a gasoline engine or a gas engine that uses propane gas as a fuel may be employed. The exhaust gas of the prime mover 21 passes through the exhaust pipe 210 and is sent to the heat exchanger 24 described later.

  The exhaust gas of the prime mover 21 may be directly discharged into the house body 1 after passing through the heat exchanger 24 or without passing through a part thereof. In this structure, the exhaust gas storage bag 3 is not necessarily provided. Thereby, the carbon dioxide gas for activating the plant can be directly supplied into the house body 1 by the exhaust gas. In this case, a toxic gas such as carbon monoxide gas contained in the exhaust gas is adsorbed or It is preferable to ensure the safety of workers by using means or devices for detoxification.

  The output shaft of the prime mover 21 is directly connected to the rotating shaft of the adjacent generator 22. Thus, when the prime mover 21 is operated, the generator 22 generates power. The electric power obtained by the generator 22 is used as a power source for the lighting equipment 15 and a fan motor of a blower 23 described later or other electrical equipment.

  The rotation speed of the output shaft of the prime mover 21 can be adjusted by the accelerator lever 211. As shown in FIG. 5, the accelerator lever 211 is set to the H position at high speed. When the accelerator lever 211 is switched to a medium speed, the drive lever 213 fixed to the adjustment shaft end of the control motor 212 is rotated clockwise to move the interlocking accelerator lever 211 from the H position to the M position. Further, similarly, the prime mover 21 can be stopped by moving the accelerator lever 211 from the M position to the S position. Reference numerals 214H, 214M, and 214S are limit switches used to stop the adjustment shaft of the control motor 212 at the commanded position.

  The wiring diagram shown in FIG. 6 will be described. An induction generator is used as the generator 22 driven by the prime mover 21. The induction generator has a structure that is self-excited by a capacitor, and both or one of the capacitors 220a and 220b is connected to the generator 22 by contactors 221a and 221b. The electric power generated by the generator 22 is supplied to the loads 223a and 223b by closing the contactors 222a and 222b.

  In order to maintain the generated voltage appropriately, the generator 22 is controlled by the rotational speed of the generator 22 proportional to the generated frequency, by the capacity and type of the loads 223a and 223b, or by the capacitors 220a and 220b by the contactors 221a and 221b. The combination to connect with can be changed.

The blower 23 is driven by the electric power obtained by the generator 22 as described above, and can blow air to the adjacent heat exchanger 24. In the vicinity of the inlet side of the blower 23, the discharge port of the supply pipe 32 is opened as described above.
The heat exchanger 24 can heat the circulating gas sent by the blower 23 using the hot exhaust gas discharged from the prime mover 21 and sent through the exhaust pipe 210 as a heat source.

  The auxiliary burner 25 is attached to the outside of the discharge side portion of the heat exchanger 24 in the wind tunnel 203. The auxiliary burner 25 can warm the circulating gas by releasing and mixing the high-temperature combustion gas into the circulating gas passing through the inside of the wind tunnel 203 as necessary, for example, when the circulating gas is not sufficiently heated. .

  Note that, on the suction side of the frame 20, an intake pipe 26 is connected to the same height as a path in which the generator 22, the prime mover 21, the blower 23, the heat exchanger 24, and the auxiliary burner 25 are provided. The intake pipe 26 is branched in two directions, and the suction port 261 of each branch pipe 260 opens near the ground. Further, on the discharge side of the frame 20 (right side in FIG. 4), a blower pipe 27 is connected to the same height as the intake pipe 26. The blower pipe 27 is branched in two directions, and each branch pipe 270 is suspended along the lower side of the support line 12, and the discharge port 271 is opened near the other end of the growing space 14.

(Function)
The operation of the plant cultivation house A1 will be described with reference to FIGS.
A cultivation shelf 4 is provided inside the plant cultivation house A1. And when the internal temperature of house A1 for plant cultivation is a low temperature which is not suitable for the growth of the plant to grow, the cogeneration apparatus 2 is operated and temperature is raised to a suitable temperature.
When the prime mover 21 is activated, the generator 22 is driven to generate power. With this electric power, the blower 23 is driven and blown to the heat exchanger 24. This electric power is also used for the lighting fixture 15.

  High-temperature exhaust gas generated by the prime mover 21 is sent to the heat exchanger 24 through the exhaust pipe 210, and the circulating gas passing through the heat exchanger 24 is heated. Further, the exhaust gas that has passed through the heat exchanger 24 passes through the air supply pipe 31, is sent to the exhaust gas storage bag 3, and is stored therein. Thus, the exhaust gas discharged from the prime mover 21 is not directly discharged into the growth space 14.

  The circulating gas heated by the heat exchanger 24 is further heated by the auxiliary burner 25 as necessary. In particular, in the initial stage of operation, it is preferable to operate the auxiliary burner 25 in order to raise the temperature in a short time. The circulating gas heated in this way enters the blower pipe 27, is further divided into the branch pipes 270, and is discharged from the discharge port 271 toward the other end of the growth space 14.

  The circulating gas is stirred while being circulated in the growth space 14, and the temperature is lowered due to heat dissipation to the outside, etc., and from the suction port 261 on the side opposite to the discharge port 271 to each intake pipe 26. Enters the blower 23 through the intake pipe 26. In the path from the intake pipe 26 to the blower 23, the heat dissipated from the surfaces of the prime mover 21 and the generator 22 is taken into the circulating gas, and the circulating gas is heated. The circulating gas is repeatedly circulated through the path, and the temperature in the growth space 14 is kept at an appropriate temperature by appropriately controlling the operation and stop of the cogeneration apparatus 2.

  In addition, since the circulating gas that is heated in the house body 1 does not move all of the gas regularly, the amount of heat of the circulating gas is the house body that tends to gather gas with high temperature. There is a tendency to be biased toward the ceiling of 1 and become larger. Moreover, the amount of heat dissipated to the outside air tends to increase in the portion where the amount of heat held is large. In the present embodiment, since the exhaust gas storage bag 3 is provided on the ceiling of the house body 1, the exhaust gas contained in the exhaust gas storage bag 3 becomes a gas layer and exhibits a heat insulation effect. Therefore, heat dissipation to the outside air at the ceiling where the amount of heat is large in the space where the circulating gas circulates is hindered. Thereby, the thermal efficiency as the whole house improves.

  On the other hand, the exhaust gas storage bag 3 swells when the exhaust gas enters, and a predetermined amount of exhaust gas can be stored. Further, inside the exhaust gas storage bag 3, each gas component contained in the exhaust gas tends to be divided into layers in the vertical direction due to the difference in specific gravity. That is, carbon dioxide forms a lower layer because of its relatively high specific gravity. In addition, carbon monoxide, nitrogen, oxygen, and the like have a relatively low specific gravity and thus form an upper layer.

  Thereby, for example, in the time zone necessary for plant cultivation, the gas component accumulated in the lower part of the exhaust gas storage bag 3, that is, mainly carbon dioxide gas is appropriately supplied to the growing space 14 in the house body 1 by the supply pipe 32. By controlling the electromagnetic valve 33, it can be discharged efficiently. Further, gas components accumulated in the upper portion of the exhaust gas storage bag 3, that is, other gases including toxic carbon monoxide gas can be discharged from the discharge pipe 30 to the atmosphere outside the house body 1.

  In addition, since the circulation gas in the house main body 1 containing exhaust gas (mainly carbon dioxide gas) is circulated and agitated, heat exchange is efficiently performed in the circulation gas, and the house is heated. A sufficient amount of heat can be supplied. Further, by circulating the circulating gas, each gas component is evenly dispersed in the house main body 1 and the concentration of carbon dioxide gas is not biased, thereby improving the risk of working environment such as lack of oxygen. be able to.

  The internal gas pressure for discharging each gas from the exhaust gas storage bag 3 is the air supply pressure when the exhaust gas is sent, or when the exhaust gas storage bag 3 tries to shrink and deform with its own weight. Although it can be obtained by pressure, etc., especially in the latter case, each gas is automatically discharged even when the operation of the cogeneration system 2 is stopped and the exhaust gas supply to the exhaust gas storage bag 3 is stopped. Therefore, stable supply of carbon dioxide gas into the growth space 14 and stable discharge of other gas components to the outside of the house body 1 are possible. The gas pressure may be obtained by using a dedicated fan or blower.

As described above, when the exhaust gas discharged from the prime mover 21 is temporarily stored in the exhaust gas storage bag 3, the carbon dioxide gas that assists the growth of the plant to be cultivated is introduced into the growth space 14. An appropriate amount of carbon dioxide gas can be mainly introduced separately from other gas components such as toxic carbon monoxide contained therein, so that the safety of workers can be improved.
The concentration of carbon dioxide gas in the growth space 14 is monitored and controlled by a concentration control device (not shown) or the like so as not to be in a dangerous oxygen deficient state, and is maintained at a safe concentration, for example, 20 PPM or less. It has become.

FIG. 7 is a side cross-sectional view illustrating a second embodiment of the plant cultivation house.
In addition, in the figure, the same code | symbol is attached | subjected to the location equivalent to the said house A1 for plant cultivation.
In the plant cultivation house A2, the cogeneration apparatus 2 is installed on one end side in the width direction of the house body 1. The intake pipe 26 a and the blower pipe (not shown in the figure) of the cogeneration apparatus 2 are passed through the inside of the cultivation shelf 4 below the legs.

  The intake pipes 26a are provided with three inlets 261a at the positions of the respective cultivation shelves 4, each of the inlets 261a is opened near the ground, and the outlets of the blower pipes (not visible in the figure) are the growth spaces 14. It is opening near the other end (near the rear end in FIG. 7). Thereby, it can install so that the intake pipe 26a and a ventilation pipe, especially a ventilation pipe may not become obstructive, and may not stand out.

FIG. 8 is a front view longitudinal sectional view showing a third embodiment of the plant cultivation house.
In addition, in the figure, the same code | symbol is attached | subjected to the location equivalent to the said house A1 for plant cultivation.
In the plant cultivation house A3, an isolation curtain 34 formed of a sheet made of synthetic resin having airtightness is provided on the support line 12. A space surrounded by the isolation curtain 34 and the top side of the house main body 1 is an exhaust gas storage portion 3a provided almost airtight from the outside.

The isolation curtain 34 can also be formed by attaching a highly rigid plate such as aluminum to the skeleton 10 instead of a synthetic resin sheet. In this case, the support line 12 is not necessarily required, but support means such as the support line 12 may be provided.
An exhaust pipe 30a that exhausts gas components including toxic carbon monoxide gas and the like in the exhaust gas storage section 3a to the atmosphere is provided on the upper portion on one end side of the house body 1. Further, an air supply pipe 31 and a supply pipe 32 provided with a solenoid valve (not shown in FIG. 8) are connected to the lower side of the isolation curtain 34. According to this, the structure of the exhaust gas storage part becomes simpler, and the equipment cost can be suppressed to a low cost.

FIG. 9 is a schematic explanatory view showing another embodiment of the cogeneration apparatus.
In addition, in the figure, the same code | symbol is attached | subjected to the location equivalent to the said house A1 for plant cultivation.
In the cogeneration apparatus 2a, the snake pipes 251 and 252 are provided in the wind tunnel 203, and the circulating gas sent by the blower 23 can ventilate the gap between the snake pipes 251 and 252. Both end sides of the snake pipes 251 and 252 are passed through the upper and lower portions of the side wall of the wind tunnel 203, and the ends are open.

  On the upper suction side, a combustion chamber 253 is provided so as to surround the upper ends of the serpentine tubes 251 and 252, and an auxiliary burner 25 is attached to the side wall of the combustion chamber 253. The combustion chamber 253 is provided with an intake port 254. Further, a decompression chamber 255 is provided on the lower discharge side so as to surround the lower ends of the serpentine tubes 251 and 252, and a blower 256 is attached to a side wall of the decompression chamber 255. Exhaust gas from the blower 256 is sent to the exhaust gas storage bag 3 through an air supply pipe 257.

  According to this, the circulating gas can be heated by the combustion gas of the auxiliary burner 25 via the serpentine tubes 251 and 252 and the combustion gas is sent to the exhaust gas storage bag 3 without being mixed with the circulating gas. Further, since the carbon dioxide is mainly supplied from the exhaust gas storage bag 3 to the growth space 14 in the same manner as the exhaust gas from the prime mover 21, toxic carbon monoxide contained in the combustion gas is included in the circulating gas. Other gas components other than carbon dioxide gas such as gas are not mixed, or the mixed amount can be reduced. Thereby, the safety | security with respect to an operator can further be improved.

  Note that the terms and expressions used in this specification are merely explanatory and are not limiting at all, and terms and expressions equivalent to the features described in this specification and parts thereof. There is no intention to exclude. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

Plan view partial cross-section explanatory drawing which shows 1st Embodiment of the house for plant cultivation. Front view longitudinal cross-section explanatory drawing of the house for plant cultivation. The side view longitudinal cross-section explanatory drawing to which the house for plant cultivation expanded. Front view explanatory drawing of the cogeneration apparatus used for the house for plant cultivation. Explanatory drawing of the engine speed control mechanism of a cogeneration apparatus. The wiring diagram of the main circuit of a cogeneration apparatus. Side view longitudinal cross-section explanatory drawing which shows 2nd Embodiment of the house for plant cultivation. Front view longitudinal cross-section explanatory drawing which shows 3rd Embodiment of the house for plant cultivation. Schematic explanatory drawing which shows other embodiment of a cogeneration apparatus.

Explanation of symbols

A1 House for plant cultivation 1 House body 10 Frame 11 Sheet 12 Support line 13 Accommodating space 14 Growing space 15 Lighting equipment 2 Cogeneration device 20 Frame 201 Caster 202 Intermediate shelf 203 Wind tunnel 21 Motor generator 210 Exhaust pipe 211 Accelerator lever 212 Control motor 213 Drive Lever 214H, 214M, 214S Limit switch 22 Generator 220a, 220b Capacitor 221a, 221b Contactor 222a, 222b Contactor 223a, 223b Load 23 Blower 24 Heat exchanger 25 Auxiliary burner 26 Intake pipe 260 Branch pipe 261 Suction port 27 Blower pipe 270 Branch pipe 271 Exhaust port 3 Exhaust gas storage bag 30 Exhaust pipe 31 Air supply pipe 32 Supply pipe 33 Solenoid valve 4 Cultivation shelf A2 House for plant cultivation 26a Intake pipe 261a Plug mouth A3 for plant cultivation house 3a exhaust gas reservoir 30a discharge pipe 34 isolated curtain 2a cogeneration system 251, 252, the flexible tube 253 combustion chamber 254 inlet 255 vacuum chamber 256 blower 257 flues

Claims (6)

Air containing heat generated in the cogeneration device (2) and exhaust gas discharged from the prime mover (21) of the cogeneration device (2) are introduced into the house body (1), and the air containing the introduced heat The exhaust gas is forcedly circulated through the circulation path in the house body (1) together with the air in the house body (1), and the circulating gas is heated by the heat exchanger (24) using the heat of the exhaust gas as a heat source. And supplying carbon dioxide gas for plant activation into the house body (1),
A method for supplying carbon dioxide gas in a house for plant cultivation. Air containing heat generated in the cogeneration device (2) and exhaust gas discharged from the prime mover (21) of the cogeneration device (2) are introduced into the house body (1), and the air containing the introduced heat The exhaust gas is forcedly circulated through the circulation path in the house body (1) together with the air in the house body (1), and the circulating gas is heated by the heat exchanger (24) using the heat of the exhaust gas as a heat source. And a cogeneration apparatus for supplying carbon dioxide gas for plant activation into the house body (1),
An air flow passage (203), and in the air flow passage (203),
Prime mover (21),
A generator (22) driven by the prime mover (21);
A fan (23) that is driven by electric power generated by the generator (22) and circulates the gas in the house body (1),
Using the heat of the exhaust gas of the prime mover (21) as a heat source, a heat exchanger (24) for heating the circulating gas,
Means for supplying carbon dioxide gas in the house body (1) by discharging exhaust gas of the prime mover (21);
Cogeneration equipment equipped with. Air containing heat generated in the cogeneration device (2) and exhaust gas discharged from the prime mover (21) of the cogeneration device (2) are introduced into the house body (1), and the air containing the introduced heat The exhaust gas is forcedly circulated through the circulation path in the house body (1) together with the air in the house body (1), and the circulating gas is heated by the heat exchanger (24) using the heat of the exhaust gas as a heat source. And a house for plant cultivation using a cogeneration device (2) for supplying carbon dioxide gas for plant activation into the house body (1),
The plant cultivation house is
A house main body (1) and a cogeneration device (2) provided in the house main body (1) are provided, and heat or / and electricity is supplied into the house main body (1) by the cogeneration device (2). Including energy,
The cogeneration apparatus (2) includes an air flow passageway (203),
In the air flow passage (203),
Prime mover (21),
A generator (22) driven by the prime mover (21);
A fan (23) that is driven by electric power generated by the generator (22) and circulates the gas in the house body (1),
Using the heat of the exhaust gas of the prime mover (21) as a heat source, a heat exchanger (24) for heating the circulating gas,
Means for supplying carbon dioxide gas in the house body (1) by discharging exhaust gas of the prime mover (21);
A plant cultivation house. Air containing heat generated in the cogeneration device (2) and exhaust gas discharged from the prime mover (21) of the cogeneration device (2) are introduced into the house body (1), and the air containing the introduced heat The exhaust gas is forcedly circulated through the circulation path in the house body (1) together with the air in the house body (1), and the circulating gas is heated by the heat exchanger (24) using the heat of the exhaust gas as a heat source. And a house for plant cultivation using a cogeneration device (2) for supplying carbon dioxide gas for plant activation into the house body (1),
The plant cultivation house is
A house main body (1) and a cogeneration device (2) provided in the house main body (1) are provided, and heat or / and electricity is supplied into the house main body (1) by the cogeneration device (2). Including energy,
The cogeneration device (2) includes an air flow passageway (203),
In the air flow passage (203),
Prime mover (21),
A generator (22) driven by the prime mover (21);
A fan (23) that is driven by electric power generated by the generator (22) and circulates the gas in the house body (1),
Using the heat of the exhaust gas of the prime mover (21) as a heat source, a heat exchanger (24) for heating the circulating gas,
With
An exhaust gas storage part (3) for storing the exhaust gas of the prime mover (21) is provided in the house body (1), and the exhaust gas storage part (3) includes an exhaust gas storage part (3 ) Gas supply means (32) for supplying the lower gas in the house main body (1) and gas discharge means for discharging the upper gas in the exhaust gas storage section (3) out of the house main body (1) ( 30)
House for plant cultivation. An exhaust gas storage part (3) is provided on the ceiling of the house body (1),
The house for plant cultivation of Claim 4. The exhaust gas storage part (3) is a bag having airtightness and flexibility,
The house for plant cultivation according to claim 4 or 5.

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