Temperature environment adapting system in agricultural and horticultural house

Abstract

To develop a temperature environment adapting system which sucks and recovers cold air staying in a non-suitable temperature zone in an agricultural and horticultural greenhouse, heats the cold air, then discharges the air into a greenhouse room to circulate the air in the greenhouse room, and efficiently uniforms a temperature of the whole greenhouse room.SOLUTION: A system includes a greenhouse room 13, a heater unit 2 provided in the greenhouse room 13, and a circulation path device 4 for circulating air in the greenhouse room 13, the heater unit 2 including a heater body 24 as a heat source and a blower device 23 for sending out air heated by the heater body 24 into the greenhouse room 13 in a sealed state, wherein one end of an air intake duct 41 in a circulation passage device 4 is connected to an air intake side of a blower device 23, an air outlet of the circulation passage device 4 is formed on an air supply side of the blower device 23, and an air intake port 42 in the air intake duct 41 is faced to a non-suitable temperature zone Z inevitably generated in a house room 13.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a heating method for agricultural and horticultural greenhouses, and in particular to a temperature environment optimization system in agricultural and horticultural greenhouses that can heat the interior of the greenhouse in a uniform manner, which contributes to crop growth, and does not generate carbon dioxide, which is a cause of global warming. [Background technology]

[0002] So-called agricultural and horticultural greenhouses have the advantage that they make it easier to optimize or stabilize the growing environment for crops, and thus allow for the expectation of a stable harvest. On the other hand, when the outside temperature is low, especially at night, it is necessary to heat the inside of the greenhouse with an appropriate heating means and keep it at an appropriate temperature. For this reason, combustion burners and the like are generally operated to heat the inside of the greenhouse and keep it at an appropriate temperature. However, such heating by combustion emits carbon dioxide, which is currently a cause of global warming, and the air required for combustion is introduced from outside the greenhouse, while the combustion gas is exhausted outside the greenhouse, so the heating efficiency is not necessarily good.

[0003] In addition, in actual horticultural greenhouses, the temperature distribution in the field inside the greenhouse is often not uniform due to the crop training conditions, the conditions inside the facility, or the location conditions, and such temperature differences can be a major hindrance to crop cultivation. For this reason, soft ducts (flexible ducts) that can be installed in different positions are used to distribute hot air evenly inside the greenhouse, but even so, depending on the shape of the field, it is difficult to achieve a uniform temperature distribution. In particular, cold air tends to stagnate in low positions within the greenhouse or behind equipment and partitions, and such non-optimum temperature zones are unavoidable in agricultural and horticultural greenhouses.

[0004] In order to heat such a non-optimum temperature zone, a duct outlet has been conventionally arranged to blow hot air toward the non-optimum temperature zone. Although the non-optimum temperature zone can be heated in this way, hot air has a tendency to move upwards, so even if the non-optimum temperature zone is heated by hot air, this is often only a temporary effect. Therefore, coupled with such physical phenomena, the conventional method cannot necessarily efficiently heat the entire house interior to a uniform state. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-189331 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made taking into consideration the above-mentioned background, and has set as its technical objective the development of a new temperature environment optimization system for agricultural and horticultural greenhouses, based on the idea that a method of heating the entire interior of a greenhouse in a uniform manner can be achieved more efficiently by sucking and collecting the cold air that has accumulated in the non-optimum temperature zone, heating it, and releasing it into the greenhouse, thereby circulating air in the sealed greenhouse. [Means for solving the problem]

[0007] That is, the temperature environment optimization system for an agricultural and horticultural greenhouse according to claim 1 is as follows: A system for realizing a temperature environment suitable for crops grown in an agricultural or horticultural greenhouse, the system comprising: A house chamber configured to be able to be sealed in the agricultural and horticultural house; A heater unit provided in the house; and a circulation device for circulating air in the house, The heater unit includes: A heater body as a heat source; and a blower device for blowing the air heated by the heater body into a sealed house room. This device is characterized in that one end of an intake duct in the circulation device is connected to the intake side of the blower device, an outlet of the circulation device is formed on the air delivery side of the blower device, and the intake port of the intake duct faces a non-optimum temperature zone that inevitably occurs inside the house.

[0008] The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 2 has, in addition to the requirements of claim 1, The non-optimal temperature zone is characterized by a lower temperature compared to the air of the optimal environment.

[0009] The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 3 further comprises, in addition to the requirements of claim 1 or 2, The air heated by the heater body is sent from the heater unit to a buffer chamber, passes through the buffer chamber, and is then released into the house.

[0010] The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 4 has, in addition to the requirements of claim 3, The buffer chamber is characterized in that a metal plate is used as a surface material, and when the interior of the house is heated, the surface material acts as a heat dissipating material.

[0011] The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 5 further comprises, in addition to the requirements of claim 1 or 2, The heater body is characterized in that an electric heater is applied.

[0012] The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 6 further comprises, in addition to the requirements of claim 1 or 2, The intake duct is characterized in that it is formed as a branch pipe having a suction tip side branched into a plurality of pipes.

[0013] The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 7 further comprises, in addition to the requirements of claim 6, The branch pipe is characterized in that a filter cap having a large number of small holes is provided at the tip of the suction side.

[0014] The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 8 further comprises, in addition to the requirements of claim 1 or 2, A mist nozzle for supplying humidifying mist is provided downstream in the direction of air flow from the heater unit.

[0015] The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 9 further comprises, in addition to the requirements of claim 8, The present invention is characterized in that, along with the supply of the humidifying mist, chemicals are also supplied into the house. The above problems are solved by the configurations of the inventions described in each claim. Effect of the Invention

[0016] First, according to the invention described in claim 1 or 2, the air (cold air) stagnating in the non-optimum temperature zone is sucked in by the intake duct, heated by the heater unit, and then released into the sealed house interior. This specific circulating flow configuration makes it possible to efficiently and uniformly heat the house interior. In addition, the temperature environment optimization system of the present invention is not a type that is fixedly installed on the land where the agricultural and horticultural greenhouse is built, so the components can be moved relatively easily. Also, since the air inside the closed greenhouse is sucked in and sent out by a single blower device and circulated, there is no need for troublesome air volume adjustments, and it can be operated relatively easily.

[0017] According to the invention described in claim 3, the air heated by the heater body of the heater unit passes through the buffer chamber before being released into the greenhouse, so even if the air heated by the heater body is somewhat hot (even if it is too hot to be released directly into the greenhouse), by passing through the buffer chamber, the high temperature is alleviated by the time it is released into the greenhouse. This makes it possible to obtain an environment that is even more suitable for crop growth.

[0018] According to the invention described in claim 4, the outer shell material of the buffer chamber is made of a metal plate that has a heat dissipation function, so that in the buffer chamber, the outer shell material of the buffer chamber first absorbs the heat of the heated air, and the outer shell material itself becomes heated and acts as a heat dissipation plate. Therefore, heat is gradually dissipated from the entire surface of the buffer chamber into the greenhouse, and the air in the greenhouse can be heated slowly. In this way, the temperature adjustment function of the buffer chamber, that is, the function of mitigating the high temperature of the heated air and gradually heating the crops in the greenhouse, can be further promoted.

[0019] According to the invention described in claim 5, since an electric heater (electric heater) is applied as the heater main body, it is possible to suppress the generation of carbon dioxide, which is a cause of global warming, when the sucked and collected cold air is heated.

[0020] Furthermore, according to the invention described in claim 6, the suction tip side of the intake duct is configured as multiple branch pipes, so that even if the air (cold air) stagnating in the non-optimum temperature zone extends over a relatively wide area, the cold air can be efficiently sucked in and recovered.

[0021] Furthermore, according to the invention described in claim 7, a filter cap having a large number of small holes is provided at the suction side tip of the branch pipe, so that a strong suction force can be generated at the tip of the branch pipe, and the air (cold air) stagnating in the non-optimum temperature zone can be sucked in and recovered more efficiently.

[0022] According to the invention described in claim 8, an appropriate environment can be created in terms of humidity as well as temperature inside the house.

[0023] According to the invention described in claim 9, in addition to being able to maintain the temperature and humidity inside the greenhouse at an appropriate level, chemicals such as pest repellents, insecticides, and growth promoters can also be sprayed inside the greenhouse unmanned. This eliminates the need for workers to enter the greenhouse directly and spray chemicals manually. In particular, the greenhouse may be in a hot and humid environment, and the present invention, which allows workers to spray chemicals without having to enter the greenhouse directly, also contributes to improving the safety and health management of workers. [Brief description of the drawings]

[0024] [Figure 1] 1A is a perspective view showing an agricultural or horticultural greenhouse to which the thermal environment optimization system of the present invention is applied, and FIG. 1B is a perspective view showing a main part of the thermal environment optimization system. [Diagram 2] 1 is a side view showing an agricultural and horticultural greenhouse to which the thermal environment optimization system of the present invention is applied. [Diagram 3] This is a side view showing an example of a configuration in which gas at an optimum temperature stagnating in the ceiling space inside an agricultural or horticultural greenhouse is merged with cold air sucked and recovered from a non-optimum temperature zone, and these are sent to a heater unit. [Figure 4] This is a side view showing an example configuration in which cold air sucked in and collected from a non-optimum temperature zone is transported to the ceiling space inside an agricultural or horticultural greenhouse, where it absorbs heat (exchanges heat) from the optimum temperature zone stagnating in the ceiling space, and the heated air (cold air) is sent to a heater unit. [Diagram 5]1 is a table showing the temperature distribution in an agricultural or horticultural greenhouse to which the thermal environment optimization system of the present invention is applied. [Figure 6] 1 is a table showing humidity distribution in an agricultural or horticultural greenhouse to which the thermal environment optimization system of the present invention is applied. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] The present invention is embodied in the following examples, and also includes various methods that can be improved within the scope of the technical concept thereof. EXAMPLES

[0026] Hereinafter, the temperature environment optimization system in an agricultural or horticultural greenhouse of the present invention (hereinafter simply referred to as the "temperature environment optimization system") will be specifically described. As shown in Figures 1 and 2 as an example, the temperature environment optimization system of the present invention comprises an agricultural or horticultural greenhouse 1, a heater unit 2 installed therein, a buffer chamber 3 that takes in air heated by the heater unit 2 and releases it into the greenhouse, and a circulation device 4 that circulates the air inside the greenhouse. Here, the buffer chamber 3 is a component that is installed as necessary, but is not necessarily an essential component. This is because, if the air heated in the heater unit 2 is at an appropriate temperature, it can be released directly from the heater unit 2 into the greenhouse without providing a buffer chamber 3. In addition, the term "temperature environment optimization" in the name of this invention refers to heating the air inside the house evenly throughout, in other words, heating the entire house to a uniform state, and is referred to as "(temperature environment) optimization." Hereinafter, each component constituting the thermal environment optimization system of the present invention will be described.

[0027] First, the agricultural and horticultural house 1 will be explained. The agricultural and horticultural greenhouse 1 itself can be of various known greenhouse structures, for example, a frame 11 made of a combination of suitable metal members and a panel material 12 stretched over it to form a greenhouse room 13 of a general gabled shape. Of course, it is possible to adopt a configuration in which a part of the panel material 12, specifically the ceiling part, can be made to be openable and closable, or a rolled-up structure of a flexible resin sheet can be used to allow ventilation with the outside air as needed. Due to its shape, the central part of the roof of the house room 13, which is a three-dimensional space with a gabled roof, is formed high, and this part serves as a ceiling space 14. Furthermore, within the agricultural and horticultural house 1, within the house room 13 surrounded by the panel material 12, crop ridges 15 are formed. These crop ridges 15 are often formed on the ground surface within the house room 13, but depending on the type of crop, they are often formed in a so-called trellis shape, positioned somewhat above the ground surface. The size of the agricultural and horticultural house 1 is, for example, about 1000m2.

[0028] Next, we will explain the heater unit 2 provided in such a house room 13. The heater unit 2 is for heating air, and as an example, as shown in Figs. 1 and 2 above, includes a unit housing 21 that is a shell member having a rectangular parallelepiped shape, and a heater box 22 is installed inside this. The heater box 22 is provided therein with a blower device 23 and a heater main body 24. For example, the blower device 23 has a power consumption of 15 kilowatts and is capable of generating a strong suction force on the suction side. In addition, it is desirable to use an electric convection type hot air heater as the heater main body 24 installed in conjunction with this blower device 23, in order to suppress the generation of carbon dioxide, which is a cause of global warming, during heating. Incidentally, because Japan is poor in resources such as fossil fuels, it is thought that in the future it will become increasingly difficult to procure fossil fuels using conventional methods that use fossil fuels as the main heat source (for example, combustion burners, etc.). In that respect, electricity can be produced from resources within Japan, so it is thought that it will be easier to procure a heat source for electricity than fossil fuels. The heater main body 24 is capable of heating the sucked air up to approximately 200° C., and in addition to heating the air within the house 13, it also has the function of sterilizing it.

[0029] A control unit 25 is provided inside the unit housing 21 of the heater unit 2, and a control panel 26 is disposed on the outer surface of the unit housing 21. In this embodiment, since an electric heater is used as the heater unit 2 as described above, the temperature inside the house room 13 can be easily set to a desired temperature. Specifically, for example, by setting the power supply state to the heater main body 24, the output calorie of the heater main body 24 itself can be changed, and the temperature inside the house room 13 can be controlled. Also, while maintaining the output of the heater main body 24 constant, it is possible to switch the power supply state ON / OFF by setting a timer or detecting temperature by a sensor, and to set the total amount of calories output from the heater main body 24, thereby controlling the temperature inside the house room 13 to a desired temperature. Note that such output control is a difficult method to achieve with a combustion burner. In this embodiment, an air supply pipe 27 is formed in an extended state from the side surface of the heater unit 2 and is connected to the buffer chamber 3 which will be described next.

[0030] The buffer chamber 3 will now be described. The buffer chamber 3 is an intermediate chamber that first takes in the air heated by the heater unit 2 (heater main body 24) and then releases it into the house chamber 13. As a result, even if the air heated by the heater main body 24 is somewhat hot (even if it is too hot to be released directly into the house chamber 13), the high temperature state is alleviated by the time it is released into the house chamber 13. 1 and 2, the buffer chamber 3 is configured by a vertically long rectangular parallelepiped chamber housing 31 as a whole, and the inside of the chamber is a temperature-regulating buffer room 32. The air supply communicating pipe 27 is connected to the buffer chamber 3, and an air outlet 33 is opened on the top surface of the buffer chamber 3. As described above, the buffer chamber 3 has the function of mitigating the high temperature of the heated air, i.e., the temperature adjustment function, so that the chamber housing 31 is desirably formed of a metal plate as the outer shell material. As a result, in the buffer chamber 3, the chamber housing 31 first absorbs the heat of the heated air, and the chamber housing 31 itself becomes a heated heat sink, gradually heating the air in the house 13.

[0031] Next, the circulation device 4 will be described. The circulation device 4 circulates the air within the house room 13 to equalize the temperature environment throughout the house room 13, and first has an air intake duct 41 provided therein. One end of this intake duct 41, the duct discharge side, is connected to the heater box 22 of the heater unit 2, while the other end, the duct suction side (intake port 42), is configured to face the non-optimum temperature zone Z in the house room 13 where low-temperature air (cold air) tends to stagnate. Furthermore, the intake duct 41 is formed, for example, with the tip on the suction side as a branched collecting pipe 41a, and is configured so that the cold air stagnating in the non-optimum temperature zone Z can be sufficiently sucked in from the intake ports 42, which are the tips of the individual branch pipes 41b. That is, even if the non-optimum temperature zone Z is relatively wide and the cold air stagnating therein extends over a relatively wide area, the intake side of the intake duct 41 is formed as a branch pipe 41b, so that the cold air stagnating over such a relatively wide area can be efficiently sucked in and collected.

[0032] Incidentally, the intake port 42 on the duct suction side may simply be opened with a pipe-shaped cross section, but it is preferable to attach a filter cap 43 having a large number of small holes 43a to the intake port 42. This allows a stronger suction force to be generated at the intake port 42, i.e., the tip of the branch pipe 41b, and allows the air (cold air) stagnating in the non-optimum temperature zone Z to be sucked and collected more efficiently. The circulation device 4 is configured so that the discharge side of the intake duct 41 is connected to the heater box 22, and then passes through the heater box 22 to face the blower device 23, and further includes the air blowing communication pipe 27, so that the inside of the buffer chamber 3 also becomes a part of the circulation device 4. Therefore, the air outlet 33 of the chamber housing 31 ultimately constitutes the terminal end of the circulation device 4. In the figure, the symbol H indicates an optimum temperature zone where air with a temperature suitable for crop growth, etc. exists, as opposed to a non-optimum temperature zone Z where cold air tends to stagnate. The air in this optimum temperature zone H is, naturally, air in an optimum temperature environment that is warmer than the cold air.

[0033] In this way, in the present invention, the intake side (intake port 42) of the intake duct 41 is reduced in pressure (negative pressure) by the action of the blower device 23, and cool air is sucked in from the non-optimum temperature zone Z that the intake port 42 faces. In addition, the circulation device 4 (intake duct 41) is arranged so that the sucked cool air passes through the blower device 23, and after the sucked cool air is heated by the heater unit 2, it is discharged as heated air (suitable temperature air) from the discharge side of the intake duct 41 (here, the blowing port 33 of the buffer chamber 3) into the house room 13, thereby forming a circulating flow of air in the sealed house room 13 during heating. The suitable temperature air discharged into the house room 13 is in a positive pressure state.

[0034] The present invention has the basic structure described above, and operates as follows to heat the inside of the greenhouse room 13 of the agricultural and horticultural greenhouse 1 to a uniform temperature environment. First, the heater main body 24 in the heater unit 2 is heated by a small amount of power or the like, and the blower device 23 is operated. The blower device 23 draws air into the heater box 22 through the intake port 42 of the intake duct 41, and as a result, it draws in cold air from the non-optimum temperature zone Z that the intake port 42 of the intake duct 41 faces, and introduces the cold air into the heater box 22. The cold air that has been concentrated in the non-optimum temperature zone Z is heated as it passes through the heater main body 24 by being blown by the blower device 23. Next, the air heated in the heater box 22 is sent into the buffer chamber 32 of the buffer chamber 3 via the air blowing communicating pipe 27.

[0035] The hot air sent into the buffer chamber 32 in this manner has its temperature increased to a more suitable level by the heat being absorbed by the surrounding equipment such as the chamber housing 31, and is then discharged from the air outlet 33 into the house 13. As a result of this air intake and heated air flow, first, in the non-optimum temperature zone Z, the cold air that has been stagnating in that zone is sucked in through the intake port 42 of the intake duct 41, and of course the cold air is heated by the heater unit 2 and reused, but the absorption of the cold air in the non-optimum temperature zone Z means that the air with an appropriate temperature environment that was present around it moves to the area from which the cold air has been removed (the area that was the non-optimum temperature zone Z), thereby heating the non-optimum temperature zone Z. That is, there is a physical phenomenon in which air always flows from an area of ​​high pressure to an area of ​​low pressure, and in the present invention, the non-optimum temperature zone Z facing the intake port 42 of the intake duct 41 is in a reduced pressure (negative pressure) state due to the action of the blower device 23, so that when the cold air in the non-optimum temperature zone Z is sucked in and removed, the air with an appropriate temperature environment that was present around it naturally enters the zone, filling it with air, thereby heating the zone. Furthermore, the air heated by the heater unit 2 is air that exists within the house chamber 13, and air from outside the house chamber 13 is not supplied, so the heating load on the heater unit 2 is kept low. As a result, the house chamber 13 can be heated efficiently and uniformly even with a small amount of electricity.

[0036] FIG. 5 shows the temperature distribution in the agricultural and horticultural greenhouse 1 to which the thermal environment optimization system of the present invention is applied, and FIG. 6 shows the humidity distribution. First, as shown in Fig. 5, the agricultural and horticultural greenhouse 1 used for the measurement had two greenhouse rooms 13 connected in parallel (referred to as "House 1" and "House 2"). The ceiling space 14 (ceiling) of the greenhouse room 13 was measured as measurement point 1 (indicated by circled number "1" in Fig. 5). Two positions near both ends of the longitudinal direction in the greenhouse room 1 were measured as measurement points 2 and 3 (indicated by circled numbers "2" and "3" in Fig. 5), and two positions near both ends of the longitudinal direction in the greenhouse room 2 were measured as measurement points 4 and 5 (indicated by circled numbers "4" and "5" in Fig. 5). Thus, there were a total of five measurement points inside the greenhouse room 13, and for reference, one measurement point outside the greenhouse room 13 was also measured, which is indicated by circled number "6" in Fig. 5. The combined area of ​​buildings 1 and 2 is approximately 700 m 2 It is. Furthermore, "HOT GUN" in FIG. 5 essentially indicates heater unit 2, which is installed near one end of the connection between buildings 1 and 2. The measurements were taken at predetermined times during the operating hours of the heater unit 2 (for example, from 17:00 to 6:00 the next morning), and the measurements were carried out over a period of approximately two days.

[0037] The temperature measurement results in FIG. 5 show that there is no significant difference in temperature within the house room 13 at the same time, that is, the house room 13 is heated uniformly. The maximum temperature difference in the house room 13 at the same time is within 1.5°C. For reference, this maximum temperature difference is calculated as follows: For example, in the measurement at 20:26, the maximum temperature was 20.2°C at measurement point 2 and the minimum temperature was 18.9°C at the ceiling. 20.2-18.9=1.3(℃) It is calculated as follows. Of course, if the temperature outside the house (temperature at measurement point 6) is high, the temperature inside the house room 13 is also relatively high (uniform state), and if the temperature outside the house (outside air temperature) is low, the temperature inside the house is also relatively low (uniform state). Although there are differences in temperature (high / low temperature) inside the house room 13 depending on the outside air temperature in this way, there is almost no temperature difference inside the house room 13 at the same time, and it can be seen that the temperature inside the house room 13 is controlled to be uniform.

[0038] Moreover, from the results of the humidity measurements in FIG. 6, it can be seen that the humidity inside the house room 13 at the same time was also maintained almost uniform. Even if the humidity outside the house varies greatly depending on the time of day, the humidity inside the house room 13 is, for example, 94% to 99%, and is maintained approximately constant while the heater unit 2 is in operation.

[0039] Other Examples The present invention is based on the above-described embodiment as one basic technical concept, but the following modifications can be considered. First, in a typical gable-roofed agricultural or horticultural greenhouse 1, air in a relatively high temperature range (air in an appropriate temperature environment) remains in the ceiling space 14. For this reason, as shown in Fig. 3, for example, an appropriate temperature air recovery duct 46 can be provided along the ceiling of the circulation device 4, and the air in an appropriate temperature environment that remains near the ceiling can be merged into the intake duct 41, thereby making it possible to increase the temperature of the air (cold air) sent to the heater main body 24, and thus the heating load of the heater main body 24 can be further reduced.

[0040] Of course, based on this idea, it is also possible to arrange the intake duct 41 in a detour so that it passes near the ceiling space 14 of the agricultural and horticultural greenhouse 1, as shown in FIG. 4, in order to preheat the cold air to be sent to the heater body 24. In addition, in the above-mentioned embodiment, a buffer chamber 3 was used, but in the case where it is acceptable to release heated air from the heater unit 2 into the house room 13 under appropriate temperature conditions as described above, the buffer chamber 3 does not necessarily have to be provided. Furthermore, by providing a mist nozzle 34 in the buffer chamber 3, as shown in FIG. 4 above, it is possible to discharge an appropriate amount of water mist from the mist nozzle, thereby adding a certain amount of humidity to the heated air coming out of the air outlet 33, thereby adjusting the humidity conditions in the house 13.

[0041] 4, it is possible to spray not only water (mist) but also chemicals such as pest repellents, insecticides, and growth promoters into the buffer chamber 3 and supply them together with the hot air into the house 13. Here, the reference numeral 35 in the figure denotes a chemical nozzle for spraying the appropriate chemicals described above. In addition, when spraying such a chemical into the buffer chamber 3, a separate chemical supply pipe may be installed in parallel with the water supply pipe to the mist nozzle 34, as shown by the solid line in Figure 4, or the chemical supply pipe may be joined midway through the water supply pipe to the mist nozzle 34, as shown by the dashed line in Figure 4. In the latter case, a mixture of water and chemical can be sprayed into the house room 13 from a single mist nozzle 34. In addition to the above-mentioned methods, the method of evaporating the chemicals within the housing 13 may also be such that, for example, a container with an open top containing the chemicals is placed within the buffer chamber 32 . Such a method of spraying the agent can eliminate the need for manual spraying of the agent by a human (operator) inside the house 13. [Explanation of symbols]

[0042] 1. Agricultural and horticultural house 2 Heater Unit 3 Buffer Chamber 4 Circulation system 11 Frame 12 Panel material 13 House Room 14 Ceiling space 15 Cropping row 21 Unit chassis 22 Heater Box 23 Blower unit 24 Heater body 25 Control Unit 26 Control Panel 27 Ventilation communication pipe 31 Chamber housing 32 Buffer Room 33 Air outlet 34 Mist nozzle 35 Chemical nozzle 41 Intake duct 41a Collecting pipe 41b Branch pipe 42 Air Intake 43 Filter Cap 43a small hole 46 Optimum temperature air recovery duct Z Unsuitable temperature zone H Optimum temperature zone

Claims

1. A system for realizing a temperature environment suitable for crops grown in an agricultural or horticultural greenhouse, the system comprising: A house chamber configured to be able to be sealed in the agricultural and horticultural house; A heater unit provided in the house; and a circulation device for circulating air in the house, The heater unit includes: A heater body as a heat source; and a blower device for blowing the air heated by the heater body into a sealed house room. A temperature environment optimization system for an agricultural or horticultural greenhouse, characterized in that one end of an intake duct in the circulation device is connected to the intake side of the blower device, an outlet of the circulation device is formed on the air delivery side of the blower device, and the intake port of the intake duct is made to face a non-optimum temperature zone that inevitably occurs inside the greenhouse.

2. 2. The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 1, wherein the non-optimum temperature zone has a temperature lower than that of the optimum temperature environment.

3. 3. A temperature environment optimization system for an agricultural or horticultural greenhouse as described in claim 1 or 2, characterized in that the air heated by the heater body is sent from the heater unit to a buffer chamber, passes through the buffer chamber, and is then released into the greenhouse.

4. The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 3, characterized in that a metal plate is used as a surface material of the buffer chamber, and when the interior of the greenhouse is heated, the surface material acts as a heat dissipation material.

5. 3. The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 1, wherein the heater body is an electric heater.

6. 3. The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 1, wherein the intake duct is formed as a branch pipe having a suction tip side branched into a plurality of pipes.

7. 7. The temperature environment optimization system for an agricultural or horticultural greenhouse according to claim 6, wherein the branch pipe is provided at its tip on the suction side with a filter cap having a large number of small holes.

8. 3. The temperature environment optimization system for a greenhouse according to claim 1, further comprising a mist nozzle for supplying a humidifying mist, the mist nozzle being provided downstream in the air flow direction from the heater unit.

9. 9. The temperature environment optimization system for a greenhouse according to claim 8, wherein a chemical is also supplied into the greenhouse along with the supply of the humidifying mist.

Images