JP2007319089A - Heating device of agricultural greenhouse - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy-saving low-cost heating device of an agricultural greenhouse, having a simple structure. <P>SOLUTION: This heating device has an air-conditioning converting area 5 between storage tanks 2 and 3 vertically set in a box body 1. In the air-conditioning converting area 5, a plurality of heat exchange pipes 6 connect the storage tanks 2 and 3 vertically set in the box body 1, and liquid filled in the lower storage tank 3 is heated with a heater 4 built into the lower storage tank 3 to transmit the heat through the heat exchange pipes 6 to the upper storage tank 2. Warm air is discharged from a blast outlet 10 by passing cool air from the outside through the air-conditioning converting area 5 in which warm air is filled by heat radiation action from the heat exchange pipes 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heating device for maintaining an agricultural greenhouse such as a vinyl house at a desired temperature.

  Conventionally, a heating apparatus in a vinyl house uses a boiler, for example, as a heating facility, and heat from the boiler is blown from a hot air hose laid in the vinyl house to heat the inside of the vinyl house. . However, since boilers produce hot air using kerosene as fuel and circulate it in the vinyl house for heating, CO2 emissions, which are said to contribute to global warming, are high. Therefore, further energy saving was required. In addition, since the price of kerosene depends on the supply and demand balance and the price of crude oil, there is a problem that the operating cost is not constant.

  As cooling equipment, cold air from a cooler was blown into the vinyl house through a cold air hose. However, a conventional cooler generally includes an outdoor unit as a heat source unit, an indoor unit as a use side device, and a refrigerant pipe that connects these units. The outdoor unit has a compressor and a heat source side heat exchanger, the indoor unit has a use side heat exchanger and a throttling device, and the above compressor, heat source side heat exchanger, throttling device, use side heat exchanger, etc. are connected by piping. Thus, a refrigeration cycle is configured. However, in recent years, from the viewpoint of environmental protection, there has been a serious problem that may cause ozone destruction depending on the type of refrigerant charged in the refrigeration cycle.

  Furthermore, both the heating and cooling facilities described above require large-scale construction for burying and laying pipes for blowing air, and have the problems of high equipment, maintenance, and operating costs.

  On the other hand, devices that use electric heaters as heating heat sources for agriculture, horticultural greenhouses, and the like have been developed. (See Patent Document 1)

  The apparatus described in Patent Document 1 is provided with an electric heater in an agricultural greenhouse, and this electric heater is controlled by a temperature sensor. This apparatus heats the greenhouse by energizing an electric heater when the temperature in the greenhouse decreases. Since this apparatus heats the greenhouse with an electric heater, there is a drawback that the power consumption is extremely large and the running cost is remarkably high.

  Running costs can be reduced using midnight power. Late-night power effectively uses surplus power from power plants that cannot be stopped at night when power consumption is low. In particular, power plants in Japan in recent years have a large proportion of nuclear power generation and thermal power generation. In these power plants, the generator cannot be stopped even at night, and the amount of reduction in the output of the generator is limited. Therefore, even if the power consumption is reduced at night, the output of the generator cannot be controlled to the power consumption, and the generated power becomes larger than the power consumption, so that the generated power cannot be used effectively. In addition, since the power generation efficiency of the generator decreases when the output is reduced, if the output is controlled to be small at night, the power generation efficiency is deteriorated and the power generation cost is increased. Effective use of late-night power eliminates this problem.

However, the device of Patent Document 1 that energizes an electric heater with midnight power cannot efficiently use midnight power. This is because the temperature of the greenhouse is detected and the electric heater is turned on and off and held at a predetermined temperature.
Japanese Utility Model Publication No. 60-111647

  The present invention has been made to solve the conventional problems. The objective of this invention is providing the heating apparatus of the greenhouse for agriculture of energy saving and low cost.

  In order to achieve the above-described object, the first agricultural greenhouse heating apparatus of the present invention is provided with an upper water storage tank 2 and a lower water storage provided with an air conditioning conversion area 5 between them and spaced apart vertically. A heat exchanger 18 in which the tank 3 is connected by a plurality of heat exchange pipes 6, a heater 4 which is built in the lower water storage tank 3 and heats the circulating fluid filled in the lower water storage tank 3, and air conditioning The conversion area 5 includes a blower fan 9 that forcibly blows air in the agricultural greenhouse and a timer 20 that is connected to the heater 4 and sets the energization time of the heater 4 to midnight power. The heater 4 is energized, the circulating fluid in the lower storage tank 3 is heated by the energized heater 4, and the heated circulating fluid is circulated through the heat exchange pipe 6 to the upper storage tank 2 to send air. Agricultural greenhouse air with fans 9 And forced air to the conversion area 5, and the air is forcibly blown warmed in the heat exchange pipe 6, characterized by heating the agricultural greenhouse.

  The second agricultural greenhouse heating apparatus of the present invention is characterized in that the heat exchanger 18 is housed in the housing 1.

  Furthermore, the third agricultural greenhouse heating apparatus of the present invention is characterized in that the total length of the upper water storage tank 2 and the lower water storage tank 3 is substantially equal.

  Furthermore, the fourth heating apparatus for an agricultural greenhouse according to the present invention is characterized in that a plurality of fins 7 are provided in the heat exchange pipe 6 at a predetermined interval.

  Furthermore, the fifth heating apparatus for an agricultural greenhouse of the present invention is provided with a cold / hot air switching valve 13 on the discharge side of the air conditioning conversion area 5, and with the cold / hot air switching valve 13, the air conditioning conversion area 5 is provided. It is characterized by switching the passed air up or down.

  Furthermore, the sixth heating apparatus for an agricultural greenhouse of the present invention is provided with a suction duct 16 connected to the air conditioning conversion area 5 above the upper water storage tank 2 and below the lower water storage tank 3, The air sucked into the suction duct 16 is passed through the air conditioning conversion area 5 and discharged to the agricultural greenhouse.

  Furthermore, the seventh heating apparatus for an agricultural greenhouse of the present invention connects a plurality of heat exchangers 18 in parallel, and the upper storage tank 2 and the lower storage tank 3 of each heat exchanger 18 include A vertically long tank, the upper water storage tank 2 and the lower water storage tank 3 made of this long and narrow tank are arranged in parallel to each other and connected in parallel.

  Furthermore, the heating device for an agricultural greenhouse of the eighth aspect of the present invention is characterized in that the liquid stored in the upper water storage tank 2 and the lower water storage tank 3 is water or oil.

  Furthermore, the ninth agricultural greenhouse heating apparatus of the present invention is connected to a water pump 19 for supplying ground water to the lower water storage tank 3 or the upper water storage tank 2, and this water pump 19 is connected to the lower water tank 19. The ground water is supplied to the water storage tank 3 or the upper water storage tank 2 to cool the heat exchange pipe 6, and the air in the agricultural greenhouse is forcibly blown to the air conditioning conversion area 5 to cool it.

  According to the first invention, there is a feature that the greenhouse for agriculture can be heated for energy saving by effectively using the midnight power that is the surplus power at night. In particular, the heating device for an agricultural greenhouse of the present invention does not directly heat the greenhouse with an electric heater energized with midnight power, but uses the electric heater to heat the liquid in the upper and lower storage tanks. Warm and warm the air in the agricultural greenhouse through the heated liquid. This warming device stores the energy of late-night power in a liquid and heats the greenhouse with the thermal energy stored in the liquid. Therefore, it is possible to efficiently store the midnight power supplied during the time period during which midnight power is supplied, for example, from 11:00 pm to 7:00 am in the liquid, and to warm the greenhouse with the stored thermal energy. The thermal energy stored in the liquid can warm the greenhouse after 7:00 am when the supply of midnight power is stopped. Therefore, it can be heated continuously until the morning when the temperature of the greenhouse rises in winter. Moreover, since the greenhouse is efficiently heated by effectively using surplus power at night, the overall energy saving effect including the power plant is extremely large. Furthermore, the temperature of the liquid circulated in the upper and lower water storage tanks is low compared to the temperature of the electric heater, so that the plants in the greenhouse are not heated locally to the high temperature, It has the feature that can warm the plants in the whole greenhouse to an appropriate temperature.

  Furthermore, the heating apparatus for an agricultural greenhouse of the present invention connects an upper water storage tank and a lower water storage tank with a heat exchange pipe to form a heat exchanger, and air in the greenhouse is supplied to the heat exchange pipe of the heat exchanger. Since the greenhouse is heated and the greenhouse is heated, the whole structure can be simplified and the manufacturing cost can be reduced.

  Further, according to the present invention, the heat generation is electric and does not involve combustion, so that it is safe and excellent in durability. In addition, operation and maintenance are easy, and an environmentally friendly effect is produced in which no polluted exhaust is generated.

  According to 4th invention, the heat exchange pipe provided with the several water storage tank and many fins is provided. Thereby, there is an effect that hot air or cold air can be exhausted in a short time.

  According to the fifth aspect of the invention, the warm air generated by this apparatus can be exhausted from the lower side, and the cool air can be exhausted from the upper side. Moreover, the temperature in the greenhouse for agriculture rises as it moves from the ground side in the greenhouse to the roof side in the greenhouse. In other words, the warm air is exhausted to the low temperature region in the greenhouse and the cool air is exhausted to the high temperature region in the greenhouse, so that the temperature difference in the greenhouse can be efficiently reduced.

  In addition, according to the sixth aspect of the invention, since the outside air can be taken in a wide direction and the amount of outside air can be increased, there is an effect that more uniform heat exchange air conditioning can be realized.

  According to the seventh aspect, since the plurality of heat exchangers are connected in parallel, the amount of heat exchange can be controlled by adjusting the number of heat exchangers connected in parallel. Therefore, a large number of heat exchangers can be connected in parallel in a large greenhouse, and in a small greenhouse, the number of parallel connection of heat exchangers can be reduced, so that a wide greenhouse can be heated to an optimal temperature.

  According to the eighth invention, if oil is used for the liquid, the heat exchanger can be prevented from being corroded and can be used so as not to break down for a long time. If water is used, the refrigerant can be used at low cost.

  According to the ninth aspect, the greenhouse can be cooled using groundwater. The water temperature of groundwater is constant throughout the year compared to tap water, which is about 15-18 ° C., which is considerably lower than the temperature in the greenhouse in summer. Cold ground water is supplied to the heat exchanger 18 to cool the heat exchange pipe, and the greenhouse air is forcibly blown to the cooled heat exchange pipe to cool the hot greenhouse in the summer. This state of use can be realized by stopping energization of the electric heater and circulating groundwater to the lower and upper water storage tanks, so that it can be used as it is without modifying the equipment to cool the greenhouse. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment shown below exemplifies an agricultural greenhouse heating device for embodying the technical idea of the present invention, and the present invention is an agricultural greenhouse heating device as follows. Not specified. Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the embodiments are indicated in “Claims” and “Means for Solving the Problems”. It is appended to the members shown. However, the members shown in the claims are not limited to the members in the embodiments. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in the embodiments are not intended to limit the scope of the present invention unless otherwise specified, and are merely explanations. It is just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing. In addition, it is used by the meaning including not only the name but a heating apparatus not only with the name but with the heating apparatus of the greenhouse for agriculture.

(heating)
In FIG. 1, the perspective view of the heating apparatus of the greenhouse for agriculture by one Example of this invention is shown. This agricultural greenhouse heating apparatus can be used for both cooling and heating. In Example 1, an apparatus for heating used in cold weather will be described with reference to FIG.

  The heating apparatus according to the first embodiment incorporates a heat exchanger 18 and a blower fan 9 in a substantially rectangular parallelepiped casing 1. An upper water storage tank 2 and a lower water storage tank 3 are installed at an upper part and a lower part in the housing 1. The water storage tank is made of a metal having high thermal conductivity such as aluminum or iron. The shape of the water tank is hollow so that the liquid can be stored therein. For convenience, the water storage tank is divided into an upper water storage tank 2 installed in the upper part of the housing 1 and a lower water storage tank 3 installed in the lower part of the housing 1. In Example 1, a plurality of upper water storage tanks 2 and lower water storage tanks 3 are continuously provided in parallel in the width direction. Further, each of the upper water storage tank 2 and the lower water storage tank 3 is installed substantially in parallel in the longitudinal direction without a gap.

  The lower water storage tank 3 includes a heater 4. In order to show a state in which the heater is built in FIG. 1, one lower water storage tank 3 with a lid removed is shown among a plurality of lower water storage tanks 3. A schematic wiring diagram of these heaters is also shown. Considering that the lower water storage tank 3 is filled with water as a liquid, the heater 4 is preferably a ceramic heater 4. As a result, the corrosion resistance and weather resistance are enhanced, and it can withstand long-term use. As shown in FIG. 1, a timer 20 is connected to the heater 4 installed in each lower storage tank 3. By setting the timer 20 to a time, it is possible to energize and supply midnight power efficiently during a time period in which midnight power is supplied, for example, from 11:00 pm to 7:00 am. After 7:00 am when the supply of midnight power is stopped, the power supply is stopped, and the greenhouse can be heated using the thermal energy stored in the liquid.

  Further, the upper water storage tank 2 and the lower water storage tank 3 are arranged apart from each other vertically, and an air conditioning conversion area 5 is provided therebetween. In this air conditioning conversion area 5, a heat exchange pipe 6 that connects the lower surface of the upper water storage tank 2 and the upper surface of the lower water storage tank 3 has a desired interval over almost the entire longitudinal direction of the upper water storage tank 2. There are multiple installations. The heat exchange pipe 6 is made of a metal having high thermal conductivity, like the water storage tank. The upper storage tank 2 and the heat exchange pipe 6 and the inner space of the lower storage tank 3 are connected together and filled with a liquid. In addition, a pipe 15 is installed on the first side surface of each upper water storage tank 2, and similarly, a pipe 15 is installed on each second water storage tank 3 on the second side surface facing the first side surface. The The pipes 15 extended from the upper and lower water storage tanks 2 and 3 are gathered together on the way. This facilitates management of drainage and water supply. In the first embodiment, the groundwater pumped up by the water pump 19 is supplied to the lower storage tank 2 through a pipe 15 connected to the water pump 19. Further, a water stop (not shown) is installed in the pipe 15 connected to the upper and lower water storage tanks 2 and 3, and the water can be supplied or drained through the water stop.

  Furthermore, the outer periphery of the heat exchange pipe 6 connected to the lower surface of the upper water storage tank 2 and the upper surface of the lower water storage tank 3 extends from the lower part of the heat exchange pipe 6 to the upper part at substantially equal intervals and in the width direction. A plurality of fins 7 are fixed in parallel. The fins 7 are also made of a metal having high thermal conductivity such as aluminum. As a result, the heat transfer area is increased, and thus heat radiation or cooling into the air conditioning conversion area 5 is efficiently performed.

  The opposite side surfaces in the longitudinal direction of the air conditioning conversion area 5 are open. Of these side surfaces, the first side surface is covered with a straight heater 8 in the form of a mesh, and the opening of the mesh is defined as a straight heater inlet 14. Moreover, the ventilation fan 9 is installed in the 2nd side surface facing the 1st side surface. Further, an air blowing port 10 extending from the second side surface to the outside of the housing 1 is provided. The air blowing port 10 is divided into two directions in the vicinity of the air blowing fan 9. The upper air blowing port is referred to as a cold air duct 11, and the lower air blowing port is referred to as a hot air duct 12. These ducts 11 and 12 can extend into the vinyl greenhouse, or can be connected to separate connecting members to vent the exhaust into the vinyl greenhouse.

  A cold / hot air switching valve 13 is installed in the vicinity of the bifurcation of the cool air duct 11 and the hot air duct 12 in two directions. The cold / hot air switching valve 13 is movable, and can restrict the flow of exhaust to either the cold air duct 11 or the hot air duct 12.

  The blower fan 9 has a function of exhausting the air in the air conditioning conversion area 5 to the blower port 10 side, that is, the air flow is as follows. Outside air passes through the straight heater inlet 14 and enters the air conditioning conversion area 5. The outside air moves from the first side surface side of the air conditioning conversion area 5 to the second side surface side, is sucked by the blower fan 9 and is ventilated to the blower port 10.

(Air conditioning conversion system)
A mechanism for raising the temperature of the intake air from the outside air and exhausting it using the heating device for an agricultural greenhouse as described above will be described with reference to FIG. In the first embodiment, groundwater is taken as an example of the liquid filled in the water storage tank. The groundwater filled in the lower water storage tank 3 is heated by the heater 4. The energy heat of the heater 4 is preferably stored between 11:00 pm and 7:00 am. As a result, the electricity bill can be covered with a cheap late-night charge, resulting in a low cost. The heated hot water in the lower water storage tank 3 moves into the heat exchange pipe 6 connected to the lower water storage tank 3 and into the upper water storage tank 2. This heated upper water storage tank 2 produces an effect of confining heat in the air conditioning conversion area 5. That is, the warmed air in the air conditioning conversion area 5 serves to prevent the warmed air in the air conditioning conversion area 5 from coming into direct contact with the outside air having a low temperature, and the warm air in the air conditioning conversion area 5 can be maintained. Simultaneously with the movement of the hot water, heat transfer proceeds in this order to the lower storage tank 3, the heat exchange pipe 6 and the fins 7, and the upper storage tank 2. On the other hand, the groundwater that has become cold water as the water temperature drops moves to the bottom side due to the difference in density. That is, the cold water moves to the lower water storage tank 3, is heated by the heater 4, and again moves to the upper water storage tank 2 through the heat exchange pipe 6.

  In the state as described above, cool air is sucked into the heating device of the agricultural greenhouse from the straight heater inlet 14. At this time, since the air is passed through the mesh of the straight heater 8 covered on the first side surface, an increase in intake air can be expected. The intake air further passes through the air conditioning conversion area 5 and moves to the blower fan 9 side. At this time, the intake air is warmed by the plurality of heated heat exchange pipes 6 and fins 7 in the air conditioning conversion area 5. This warm air is ventilated by the blower fan 9 to the blower opening 10, further moves to the hot air duct 12, and is exhausted into the vinyl greenhouse.

  Moreover, in Example 1, the heat exchanger 18 which consists of a pair of upper and lower water storage tanks 2 and 3 and the air-conditioning conversion area 5 interposed between them is connected in parallel. Therefore, the amount of heat exchange can be controlled by adjusting the number of heat exchangers 18 connected in parallel. Similarly, since the heat exchange pipe 6 is detachable, the amount of heat exchange can be controlled by adjusting the number of the heat exchange pipes 6. That is, by increasing or decreasing the number of connections of the heat exchanger 18 or the heat exchange pipe 6, it is possible to heat to an optimum temperature from a wide greenhouse to a narrow greenhouse.

  An example of a heating apparatus for another agricultural greenhouse is shown in FIG. In addition to the agricultural greenhouse heating device of the first embodiment, this agricultural greenhouse heating device is further provided with an intake duct 16 above and below the upper water storage tank 2 and below the lower water storage tank 3. ing. The suction duct 16 is connected to the air conditioning conversion area 5. Further, the first end of the suction duct 16 is opened, and outside air is taken in from the opened external intake port 17. The outside air taken into the heating device of the agricultural greenhouse is ventilated into the air conditioning conversion area 5 through the straight heater inlet 14 and heated. Since this heating structure is the same as that of the first embodiment, description thereof is omitted. The heated warm air is exhausted from the air outlet 10 into the vinyl greenhouse. Although a plurality of suction ducts 16 are provided in the second embodiment, they may be provided only on either the upper surface or the lower surface of the housing 1.

(Air conditioning)
An example of a cooling device for an agricultural greenhouse will be described with reference to FIG. A pipe 15 attached to the lower storage tank 3 is connected to a water pump 19 for supplying groundwater, and the groundwater is constantly supplied into the lower storage tank 3. The groundwater supplied through the pipe 15 is stored in the lower storage tank 3, and at the same time, rises in the heat exchange pipe 6 and further moves to the upper storage tank 2. The water stop (not shown) of the pipe 15 attached to the upper water storage tank 2 is open, that is, it is always drained to the outside. Therefore, the flow of groundwater always moves in the order of the lower storage tank 3, the heat exchange pipe 6, the upper storage tank 2, and the outside. When using a cooling device for an agricultural greenhouse, the temperature of groundwater is generally lower than the outside temperature and tap water. Therefore, when the groundwater moves, the heat exchange pipe 6 and the fins 7 are cooled, and thus the inside of the air conditioning conversion area 5 is also cooled. Therefore, the temperature in the agricultural greenhouse can be lowered by exhausting the air cooled in the air conditioning conversion area 5 by forcibly blowing the air in the agricultural greenhouse into the agricultural greenhouse.

  The heating device for an agricultural greenhouse of the present invention can be suitably used for a heating device or a cooling device of a livestock breeding house.

It is a perspective view of the heating apparatus of the greenhouse for agriculture which concerns on Example 1 and Example 3. FIG. It is a perspective view of the heating apparatus of the greenhouse for agriculture which concerns on Example 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Housing 2 ... Upper storage tank 3 ... Lower storage tank 4 ... Heater 5 ... Air-conditioning conversion area 6 ... Heat exchange pipe 7 ... Fin 8 ... Straight heater 9 ... Blower fan 10 ... Blower port 11 ... Cooling air duct 12 ... Hot air duct 13 ... Cool / Hot switching valve 14 ... Straight heater inlet 15 ... Pipe 16 ... Suction duct 17 ... External inlet 18 ... Heat exchanger 19 ... Water pump 20 ... Timer

Claims (9)

An air conditioning conversion area (5) is provided between the upper water tank (2) and the lower water tank (3), which are spaced apart from each other up and down. Agricultural unit (18), heater (4) built in the lower storage tank (3) and warming the circulating fluid filled in the lower storage tank (3), and air conditioning conversion area (5) A fan (9) forcibly blowing air in the greenhouse, and a timer (20) connected to the heater (4) and setting the energizing time of the heater (4) to midnight power,
The heater (4) is energized by the timer (20) at midnight power, the circulating fluid in the lower water storage tank (3) is heated by the energized heater (4), and the heated circulating fluid is heat exchange pipe It is circulated to the upper water storage tank (2) through (6), and the air in the greenhouse for agriculture is forcibly blown to the air conditioning conversion area (5) by the blower fan (9), and the forcedly blown air is heat exchange pipe. A heating apparatus for an agricultural greenhouse characterized by heating in (6) to heat the inside of an agricultural greenhouse.   The heating apparatus for an agricultural greenhouse according to claim 1, wherein the heat exchanger (18) is housed in the housing (1).   The heating apparatus for an agricultural greenhouse according to claim 1 or 2, wherein the upper storage tank (2) and the lower storage tank (3) have substantially the same overall length.   The heating apparatus for an agricultural greenhouse according to any one of claims 1 to 3, wherein the heat exchange pipe (6) is provided with a plurality of fins (7) at predetermined intervals.   A cold / hot air switching valve (13) is provided on the discharge side of the air conditioning conversion area (5), and the air that has passed through the air conditioning conversion area (5) can be switched up or down with the cold / hot air switching valve (13). The heating apparatus for an agricultural greenhouse according to any one of claims 1 to 4.   A suction duct (16) connected to the air conditioning conversion area (5) is provided above the upper water storage tank (2) and below the lower water storage tank (3), and is sucked into the suction duct (16). The heating apparatus for an agricultural greenhouse according to any one of claims 1 to 5, wherein air is passed through the air conditioning conversion area (5) and discharged to the agricultural greenhouse.   A plurality of heat exchangers (18) are connected in parallel, and the upper storage tank (2) and the lower storage tank (3) of each heat exchanger (18) are vertically elongated tanks. The upper water storage tank (2) and the lower water storage tank (3) are arranged in parallel to each other and connected in parallel with each other, and agriculture according to any one of claims 1 to 6 Greenhouse heating device.   The warming device for an agricultural greenhouse according to any one of claims 1 to 7, wherein the liquid stored in the upper water storage tank (2) and the lower water storage tank (3) is water or oil. .   A water pump (19) for supplying ground water is connected to the lower water tank (3) or the upper water tank (2), and this water pump (19) is connected to the lower water tank (3) or the upper water tank. The ground water is supplied to (2) to cool the heat exchange pipe (6), and the air in the agricultural greenhouse is forced to cool to the air conditioning conversion area (5) for cooling. The heating apparatus of the greenhouse for agriculture described in any one of -8.

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