Aquaponics system

Abstract

To provide an aquaponics system capable of reducing energy costs associated with adjusting the water temperature of rearing water.SOLUTION: An aquaponics system 1, 1A in which rearing of fish F and cultivation of plants P are performed by using rearing water W in a building 2 having a farm 3 and a cultivation chamber 4, includes: a rearing tank 10 which is provided in the farm 3 for rearing the fish F; a cultivation tank 20 which is provided in the cultivation chamber 4, and has LED lighting 21 capable of irradiating light onto the plants P for cultivating the plants P; an air-conditioning device 40 which can recover exhaust heat generated by the LED lighting 21; and an air supply device 50 which can supply the exhaust heat recovered by the air-conditioning device 40 to the farm 3.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the technology of an aquaponics system that combines fish farming and plant cultivation. [Background technology]

[0002] Aquaponics system technology, which combines fish farming and plant cultivation, has been publicly known, as described in Patent Document 1, for example.

[0003] Patent Document 1 discloses an aquaponics system that includes a breeding tank for raising fish and marine life by land-based aquaculture and a cultivation bed for growing plants by hydroponics. In the aquaponics system, the breeding of fish and marine life and the cultivation of plants can be carried out simultaneously by circulating a liquid (breeding water) between the breeding tank and the cultivation bed.

[0004] In the breeding tanks of such aquaponics systems, the temperature of the breeding water is generally regulated using electrical energy. Methods for regulating the temperature of the breeding water include the "circulation method," in which the breeding water is circulated directly to a heater / cooler, the "cushion tank method," in which the water temperature is regulated by cooling or heating water in a cushion tank and circulating it in a heat exchanger, and the "air conditioning control method," in which the entire aquarium equipment is enclosed in a building and the water temperature is regulated by an air conditioning unit inside the building.

[0005] All of the above conventional water temperature adjustment methods for land-based aquaculture consume a lot of energy to adjust the water temperature, resulting in high electricity costs, which puts pressure on the overall production costs of land-based aquaculture. Therefore, reducing the energy costs required to adjust the water temperature in aquaculture tanks has become a major challenge. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6047749 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was made in consideration of the above-mentioned circumstances, and the problem it aims to solve is to provide an aquaponics system that can reduce the energy costs required to adjust the water temperature in the aquaculture tank. [Means for solving the problem]

[0008] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0009] That is, claim 1 describes an aquaponics system for cultivating fish and plants using breeding water in a building having a fish farm and a cultivation room, comprising: a cultivation tank installed in the fish farm for cultivating fish; a cultivation tank installed in the cultivation room having an artificial light source capable of irradiating light to the plants and for cultivating the plants; an exhaust heat recovery unit capable of recovering exhaust heat from the artificial light source; and an exhaust heat supply unit capable of supplying the exhaust heat recovered by the exhaust heat recovery unit to the fish farm.

[0010] In claim 2, the exhaust heat supply unit comprises an exhaust heat storage unit capable of storing the exhaust heat, and an air duct capable of supplying air containing the exhaust heat stored in the exhaust heat storage unit to the aquaculture facility.

[0011] In claim 3, the air duct branches into a first path that can supply the air containing the exhaust heat to the aquaculture farm and a second path that can release the air containing the exhaust heat to the outdoors of the building, and the exhaust heat supply unit is equipped with a first switching unit that can switch between a first state in which the air containing the exhaust heat is supplied to the aquaculture farm via the first path and a second state in which the air is released to the outdoors via the second path.

[0012] In claim 4, the device comprises a first temperature detection unit capable of detecting the air temperature of the aquaculture farm, and a control unit capable of switching the first switching unit to the first state when the air temperature of the aquaculture farm is below a predetermined threshold, and capable of switching the first switching unit to the second state when the air temperature of the aquaculture farm is above the predetermined threshold.

[0013] In claim 5, a second temperature detection unit is provided that can detect the air temperature of the exhaust heat storage unit, and the control unit is capable of switching the first switching unit to the second state when the air temperature of the exhaust heat storage unit is not higher than the air temperature of the farm, even if the air temperature of the farm is below a predetermined threshold.

[0014] In claim 6, the exhaust heat recovery unit is capable of recovering the exhaust heat from the artificial light source by circulating a refrigerant through a heat dissipation portion of the artificial light source, and the exhaust heat supply unit includes a refrigerant pipe that circulates the refrigerant containing the exhaust heat, and a heat exchanger that is capable of supplying the exhaust heat to the rearing water in the aquaculture tank by exchanging heat between the refrigerant circulating through the refrigerant pipe and the rearing water in the aquaculture tank or the rearing water supplied to the aquaculture tank.

[0015] In claim 7, the exhaust heat supply unit includes a radiator capable of radiating the exhaust heat outdoors of the building, the refrigerant piping branches into a third path capable of supplying the refrigerant containing the exhaust heat to the heat exchanger and a fourth path capable of supplying the refrigerant to the radiator, and the exhaust heat supply unit includes a second switching unit switchable between a third state in which the refrigerant containing the exhaust heat is supplied to the heat exchanger via the third path and a fourth state in which the refrigerant is supplied to the radiator via the fourth path.

[0016] In claim 8, the device includes a third temperature detection unit capable of detecting the water temperature of the breeding water in the aquaculture tank or the breeding water supplied to the aquaculture tank, and a control unit capable of switching the second switching unit to the third state when the water temperature of the breeding water in the aquaculture tank or the breeding water supplied to the aquaculture tank is lower than a predetermined threshold, and capable of switching the second switching unit to the fourth state when the water temperature of the breeding water in the aquaculture tank or the breeding water supplied to the aquaculture tank is not lower than the predetermined threshold. [Effects of the Invention]

[0017] The present invention has the following effects.

[0018] According to claim 1, the energy cost required for adjusting the temperature of the breeding water can be reduced.

[0019] In claim 2, the air in the aquaculture farm can be heated by air containing the exhaust heat from the artificial light source, which in turn prevents the temperature of the rearing water in the aquaculture tank from decreasing. Also, by temporarily storing the exhaust heat from the artificial light source in the exhaust heat storage unit, the air containing the exhaust heat can be supplied to the aquaculture farm at an appropriate time.

[0020] In claim 3, the supply destination of the exhaust heat from the artificial light source can be switched as needed.

[0021] In claim 4, the exhaust heat from the artificial light source can be supplied to the aquaculture facility only when it is necessary to heat the breeding water in the aquaculture tank.

[0022] According to claim 5, it is possible to prevent a situation in which the air in the farm cannot be heated even if the air in the exhaust heat storage section is supplied to the farm.

[0023] According to claim 6, the breeding water in the aquaculture tank can be heated by the refrigerant containing the waste heat from the artificial light source, and the temperature of the breeding water in the aquaculture tank can be optimized.

[0024] In claim 7, the supply destination of the exhaust heat from the artificial light source can be switched as needed.

[0025] In claim 8, the exhaust heat from the artificial light source can be supplied to the breeding water in the aquaculture tank only when it is necessary to heat the breeding water in the aquaculture tank. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a schematic diagram showing the configuration of an aquaponics system according to a first embodiment of the present invention. [Figure 2] Schematic diagram to explain the outline of an aquaponics system. [Figure 3] FIG. 1 is a block diagram showing the configuration of an aquaponics system according to a first embodiment. [Figure 4] 4 is a flowchart showing switching control in the first embodiment. [Figure 5] FIG. 10 is a schematic diagram showing a part of the configuration of an aquaponics system according to a second embodiment of the present invention. [Figure 6] FIG. 10 is a block diagram showing the configuration of an aquaponics system according to a second embodiment. [Figure 7] 10 is a flowchart showing switching control in a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0027] An aquaponics system 1 according to a first embodiment of the present invention will be described below. The aquaponics system 1 is a system for simultaneously cultivating fish and plants. First, an overview of the aquaponics system 1 will be described.

[0028] When cultivating fish, the water used for cultivating fish (hereinafter referred to as "breeding water W") must be purified because ammonia contained in fish waste and other substances is harmful to the fish. Specifically, the ammonia in the breeding water W must be oxidized to nitrate and nitrite, and these nitrates and other substances must be denitrified. Nitrates and other substances are weakly toxic to fish, but are nutrients for plants. The aquaponics system 1 focuses on this point and replaces the above-mentioned denitrification with plant cultivation, thereby purifying (denitrifying) the breeding water W contaminated by fish cultivation while simultaneously cultivating fish and plants.

[0029] As shown in Figure 1, an aquaponics system 1 is installed in a building 2. The building 2 is provided with a fish farm 3 and a cultivation room 4. The fish farm 3 and the cultivation room 4 are arranged side by side in the vertical direction, and specifically, the cultivation room 4 is installed above the fish farm 3.

[0030] The following describes the configuration of the aquaponics system 1. As shown in Figures 1 and 2, the aquaponics system 1 includes a culture tank 10, a cultivation tank 20, a filtration tank 30, an air conditioner 40, an air supply device 50, a temperature detection unit 60, and a control device 70.

[0031] The aquaculture tank 10 shown in Figures 1 and 2 is used to cultivate fish F in breeding water W. As shown in Figure 1, the aquaculture tank 10 is provided in an aquaculture farm 3. The type of fish F cultivated in the aquaculture tank 10 is not particularly limited, and any appropriate type of fish F can be cultivated. For example, freshwater fish such as sturgeon may be cultivated in the aquaculture tank 10, or saltwater fish such as tiger pufferfish may be cultivated. In this way, profitability can be improved by cultivating fish that are in relatively high demand among consumers in the aquaculture tank 10.

[0032] In the aquaculture tank 10, water suitable for raising fish F is stored as the rearing water W. For example, when freshwater fish are cultured in the aquaculture tank 10, well water, tap water, or the like is stored in the aquaculture tank 10 as the rearing water W. Furthermore, when saltwater fish are cultured in the aquaculture tank 10, artificial seawater or the like having a lower salt concentration than natural seawater is stored in the aquaculture tank 10 as the rearing water W. When saltwater fish are cultured in artificial seawater or the like, it is also possible to provide a concentration control mechanism that controls the concentrations of mineral components (target components) such as sodium, calcium, and potassium.

[0033] Ammonia (ammonia nitrogen) is contained in excrement of the fish F cultivated in the cultivation tank 10. In the aquaponics system 1, the ammonia nitrogen can be oxidized to nitrate, nitrite, etc. in the filtration tank 30 described below.

[0034] The cultivation tank 20 shown in Figures 1 and 2 is for cultivating plants P in culture water W containing nitric acid and the like. As shown in Figure 1, the cultivation tank 20 is provided in the cultivation room 4. In the aquaponics system 1, not only fish F but also plants P are cultivated in the culture water W, so water suitable for cultivating fish F and plants P (well water, tap water, artificial seawater, etc.) is used as the culture water W. In the cultivation tank 20, plants P can be cultivated by hydroponic cultivation using the culture water W. Furthermore, in the cultivation tank 20, nitrates and the like contained in the culture water W are absorbed by the plants P, thereby denitrifying the culture water W.

[0035] The cultivation tank 20 is provided with an LED light 21, which is an artificial light source. The LED light 21 is provided so that it can irradiate the plant P with light when turned on. By irradiating the plant P with light from the LED light 21, the growth of the plant P can be promoted.

[0036] The plants P cultivated in the cultivation tank 20 are not particularly limited, but are preferably plants that are suitable for hydroponic cultivation and have relatively high consumer demand. For example, the plants P cultivated in the cultivation tank 20 are preferably leafy vegetables, herbs, tomatoes, etc. Cultivating such plants P can improve profitability.

[0037] The filtration tank 30 shown in FIG. 2 filters the breeding water W and adjusts the composition of the breeding water W. The filtration tank 30 is not shown in FIG. 1. The filtration tank 30 is provided with a filter medium capable of filtering (biologically filtering) the breeding water W. By using the filter medium, it is possible to remove substances to be removed from the breeding water W. The filter medium oxidizes ammonia nitrogen (ammonia nitrogen contained in the excrement of the fish F in the aquaculture tank 10) in the breeding water W that passes through the filter medium, converting it to nitrite nitrogen, and further oxidizes the nitrite nitrogen to nitrate (nitrification). Note that the method of filtration using the filter medium is not limited to biological filtration; for example, physical filtration (sedimentation filtration, sand filtration, membrane filtration, foam separation, etc.) can also be used.

[0038] In the filtration tank 30, the composition of the rearing water W used in the aquaculture tank 10 and the cultivation tank 20 is adjusted and filtered, and the rearing water W after the composition adjustment is supplied to the aquaculture tank 10 and the cultivation tank 20 for reuse. As shown in Fig. 2, the filtration tank 30 is connected to the aquaculture tank 10 and the cultivation tank 20 via a pipe L through which the rearing water W can flow. The pipe L includes a first pipe L1, a second pipe L2, a third pipe L3, a fourth pipe L4, and a fifth pipe L5.

[0039] The first pipe L1 and the second pipe L2 connect the aquaculture tank 10 and the filtration tank 30 to each other. The culture water W in the filtration tank 30 is supplied to the aquaculture tank 10 through the first pipe L1 by the power of a predetermined pump. The culture water W in the aquaculture tank 10 is also discharged through the second pipe L2 and returned to the filtration tank 30. The filtration tank 30 can filter the culture water W discharged from the aquaculture tank 10 using a filter medium.

[0040] The third pipe L3 and the fourth pipe L4 connect the cultivation tank 20 and the filtration tank 30 to each other. The culture water W in the filtration tank 30 is supplied to the cultivation tank 20 via the third pipe L3 by the power of a predetermined pump. The culture water W in the cultivation tank 20 is also discharged via the fourth pipe L4 and returned to the filtration tank 30.

[0041] The fifth pipe L5 branches off from the first pipe L1 and is connected to the filtration tank 30. A switching valve (not shown) is provided at the branch point of the fifth pipe L5, which can switch between circulating the culture water W to the first pipe L1 and circulating the culture water W to the fifth pipe L5. The culture water W circulating through the fifth pipe L5 is returned to the filtration tank 30 by the power of a predetermined pump (for example, a pump shared with the first pipe L1). The culture water W can be filtered by repeatedly supplying and discharging the culture water W to and from the filtration tank 30 using the fifth pipe L5 and passing the culture water W through a filter medium.

[0042] The air conditioning device 40 shown in FIG. 1 conditions the cultivation room 4. The air conditioning device 40 includes an indoor unit 41 and an outdoor unit 42. The indoor unit 41 is installed inside the cultivation room 4. The outdoor unit 42 is installed outside the building 2. The indoor unit 41 is connected to the outdoor unit 42, and a refrigerant can be circulated between the indoor unit 41 and the outdoor unit 42. The air conditioning device 40 can perform heating and cooling operations by circulating a refrigerant between the indoor unit 41 and the outdoor unit 42, thereby adjusting the temperature environment of the cultivation room 4.

[0043] Here, when the LED lighting 21 irradiates the plants P in the cultivation room 4 with light, a large amount of exhaust heat is generated from the LED lighting 21. For this reason, even in winter, it is necessary to cool the cultivation room 4 to a temperature suitable for cultivating the plants P (for example, about 20°C to 23°C if the plants P are lettuce) by operating the air conditioner 40 in cooling mode. The air conditioner 40 can recover the exhaust heat from the LED lighting 21 by operating in cooling mode. Specifically, when the air conditioner 40 operates in cooling mode, the exhaust heat from the LED lighting 21 is discharged from the cultivation room 4 to the outdoor unit 42 outside. Therefore, in the aquaponics system 1, exhaust heat is generated from the cultivation room 4 even in winter.

[0044] Therefore, the aquaponics system 1 is provided with a configuration for heating the culture water W in the aquaculture tank 10 by utilizing the exhaust heat generated from the cultivation chamber 4. The aquaponics system 1 is provided with an air supply device 50, a temperature detection unit 60, and a control device 70 as the configuration.

[0045] The air supply device 50 shown in Figure 1 is for supplying exhaust air from the outdoor unit 42, including the exhaust heat of the LED lighting 21, to the aquaculture facility 3. The air supply device 50 includes a chamber 51, an air duct 52, a switching damper 53, and an exhaust damper 54.

[0046] 1 stores the exhaust heat of the LED lighting 21 discharged from the outdoor unit 42. The chamber 51 is formed in an airtight box shape that can store air inside. The chamber 51 is connected to the outdoor unit 42 so as to be able to receive the air discharged from the outdoor unit 42.

[0047] The air duct 52 shown in Figure 1 is for guiding air from the chamber 51 to the farm 3 or outdoors. The air duct 52 is formed by piping through which air can circulate. The air duct 52 includes a first duct 52a, a second duct 52b, and a third duct 52c.

[0048] One end of the first duct 52a is connected to the chamber 51. The other end of the first duct 52a is connected to the switching damper 53, which will be described later.

[0049] One end of the second duct 52b is connected to a switching damper 53, which will be described later. The other end of the second duct 52b is connected to the fish farm 3.

[0050] One end of the third duct 52c is connected to a switching damper 53, which will be described later. The other end of the third duct 52c is open to the outdoors.

[0051] In this way, the air duct 52 is formed so as to branch the air containing the exhaust heat from the LED lighting 21 stored in the chamber 51 into a path (second duct 52b) that can supply the air to the aquaculture facility 3 and a path (third duct 52c) that can be opened to the outside of the building 2.

[0052] 1 and 3 is used to switch the supply destination of air circulating through the air duct 52. The switching damper 53 is provided at the junction of the first duct 52a, the second duct 52b, and the third duct 52c (the branching portion of the air duct 52). The switching damper 53 is configured to be switchable between a first state in which the air stored in the chamber 51 and circulating through the first duct 52a is supplied to the aquaculture farm 3 via the second duct 52b, and a second state in which the air is released to the outdoors via the third duct 52c. By providing the switching damper 53 in this way, the supply destination of air from the chamber 51 can be switched between the aquaculture farm 3 and the outdoors.

[0053] The exhaust damper 54 shown in Figure 1 is for natural exhaust from the aquaculture farm 3. The exhaust damper 54 is provided on the wall of the aquaculture farm 3 on the side opposite to the part that receives air from the air duct 52. By providing the exhaust damper 54 in this manner, it is possible to prevent the air supplied from the air duct 52 from creating excessive positive pressure inside the aquaculture farm 3.

[0054] The temperature detection unit 60 is for detecting temperatures at various locations. The temperature detection unit 60 includes a first temperature sensor 61 and a second temperature sensor 62.

[0055] 1 and 3 detects the air temperature inside the aquaculture facility 3. The first temperature sensor 61 is provided at an arbitrary position near the aquaculture tank 10.

[0056] 1 and 3 detects the air temperature inside the chamber 51. The second temperature sensor 62 is provided at an arbitrary position inside the chamber 51.

[0057] The control device 70 shown in Figures 1 and 3 is for controlling various devices in the aquaponics system 1. The control device 70 can be installed at any location, for example, in the aquaculture farm 3 as shown in Figure 1. The control device 70 is equipped with an arithmetic unit and a storage device, and can perform processing related to the aquaponics system 1 by performing arithmetic processing using information stored in the storage device.

[0058] The control device 70 is configured to be able to communicate with the first temperature sensor 61 and the second temperature sensor 62. By receiving a signal from the first temperature sensor 61, the control device 70 can obtain the measurement result of the air temperature inside the fish farm 3. In addition, by receiving a signal from the second temperature sensor 62, the control device 70 can obtain the measurement result of the air temperature inside the chamber 51.

[0059] The control device 70 can switch the state of the switching damper 53 between the first state and the second state based on the measurement results. For example, by setting the switching damper 53 to the first state, the control device 70 can switch the supply destination of the air stored in the chamber 51 (exhaust air from the outdoor unit 42) to the aquaculture farm 3. Furthermore, by setting the switching damper 53 to the second state, the control device 70 can switch the supply destination of the air stored in the chamber 51 (exhaust air from the outdoor unit 42) to the outdoors.

[0060] The switching control by the control device 70 will be described below with reference to Fig. 4. The switching control shown in Fig. 4 is control for switching the supply destination of the air (exhaust air from the outdoor unit 42) stored in the chamber 51. The switching control shown in Fig. 4 is executed repeatedly.

[0061] In this embodiment, the switching control shown in Fig. 4 is executed in winter. Also, the switching control shown in Fig. 4 is executed when the air conditioner 40 is performing cooling operation. When the air conditioner 40 is performing cooling operation, air containing exhaust heat from the LED lighting 21 is discharged from the outdoor unit 42 and stored in the chamber 51.

[0062] In step S11 shown in FIG. 3, the control device 70 makes a determination based on the air temperature inside the aquaculture farm 3 (hereinafter referred to as the aquaculture farm temperature T1). The aquaculture farm temperature T1 is obtained based on a signal from the first temperature sensor 61. Here, the appropriate temperature range (control range) of the aquaculture farm temperature T1 is determined, for example, in relation to the appropriate temperature of the breeding water W in the aquaculture tank 10. Hereinafter, the lower limit value of the appropriate temperature range of the aquaculture farm temperature T1 is denoted as "a", and the upper limit value of the appropriate temperature range of the aquaculture farm temperature T1 is denoted as "b". When the aquaculture farm temperature T1 is a or more and b or less (a ≤ T1 ≤ b), the control device 70 proceeds to step S12.

[0063] In step S12, the control device 70 switches the switching damper 53 to the second state and exhausts the exhaust air from the outdoor unit 42 (the air stored in the chamber 51) outdoors. That is, when the aquaculture farm temperature T1 is within the appropriate temperature range (a ≤ T1 ≤ b), the control device 70 determines that it is not necessary to raise the aquaculture farm temperature T1 and does not supply the exhaust air from the outdoor unit 42 to the aquaculture farm 3.

[0064] After performing the process of step S12, the control device 70 ends the switching control shown in FIG. 4.

[0065] On the other hand, in step S11, when the aquaculture farm temperature T1 is less than a (T1 < a), the control device 70 proceeds to step S13.

[0066] Note that when T1 < a in step S11, it indicates that the aquaculture farm temperature T1 is lower than the appropriate temperature range, and thus it is necessary to raise the aquaculture farm temperature T1.

[0067] In step S13, the control device 70 determines whether the air temperature inside the chamber 51 (hereinafter referred to as the chamber temperature T2) is higher than the farm temperature T1 (T2>T1). The farm temperature T1 is obtained based on a signal from the first temperature sensor 61. The chamber temperature T2 is obtained based on a signal from the second temperature sensor 62. If T2>T1 is satisfied (YES in step S13), the control device 70 proceeds to step S14. On the other hand, if T2>T1 is not satisfied (T2≦T1) (NO in step S13), the control device 70 proceeds to step S15.

[0068] If T2>T1 (YES in step S13), this means that the chamber temperature T2 is higher than the farm temperature T1, and therefore it is possible to raise the farm temperature T1 by supplying exhaust air from the outdoor unit 42 in the chamber 51 to the farm 3. On the other hand, if T2>T1 is not true (T2≦T1) (NO in step S13), this means that the chamber temperature T2 is not higher than the farm temperature T1, and therefore it is not possible to raise the farm temperature T1 by supplying exhaust air from the outdoor unit 42 in the chamber 51 to the farm 3.

[0069] In step S14, the control device 70 switches the switching damper 53 to the first state and supplies the exhaust air from the outdoor unit 42 in the chamber 51 to the aquaculture farm 3. This allows the aquaculture farm temperature T1 to be raised by the exhaust air from the outdoor unit 42. This makes it possible to prevent the culture water W in the aquaculture tank 10 from cooling down.

[0070] On the other hand, in step S15, the control device 70 switches the switching damper 53 to the second state, and discharges the exhaust air from the outdoor unit 42 in the chamber 51 to the outdoors.

[0071] After performing the process of step S14 or step S15, the control device 70 ends the switching control shown in FIG.

[0072] On the one hand, in step S11, when the temperature T1 in the breeding farm is greater than b (T1 > b), the control device 70 proceeds to step S16.

[0073] Note that the case where T1 > b in step S11 indicates that since the temperature T1 in the breeding farm is higher than the appropriate temperature range, it is necessary to cool the breeding water W in the breeding tank 10. When the switching control shown in FIG. 4 is executed in winter, it is rare for T1 > b to occur.

[0074] In step S16, the control device 70 determines whether the chamber temperature T2 is lower than the breeding farm temperature T1 (T2 < T1). The breeding farm temperature T1 is obtained based on the signal from the first temperature sensor 61. Also, the chamber temperature T2 is obtained based on the signal from the second temperature sensor 62. When T2 < T1 (YES in step S16), the control device 70 proceeds to step S17. On the other hand, when T2 < T1 is not satisfied (T2 ≥ T1) (NO in step S16), the control device 70 proceeds to step S18.

[0075] Note that the case where T2 < T1 (YES in step S16) indicates that since the chamber temperature T2 is lower than the breeding farm temperature T1, it is possible to lower the breeding farm temperature T1 when the exhaust from the outdoor unit 42 in the chamber 51 is supplied to the breeding farm 3. On the other hand, the case where T2 < T1 is not satisfied (T2 ≥ T1) (NO in step S16) indicates that since the chamber temperature T2 is not lower than the breeding farm temperature T1, it is not possible to lower the breeding farm temperature T1 even if the exhaust from the outdoor unit 42 in the chamber 51 is supplied to the breeding farm 3.

[0076] In step S17, the control device 70 switches the switching damper 53 to the first state and supplies the exhaust from the outdoor unit 42 in the chamber 51 to the breeding farm 3. Thereby, the temperature T1 in the breeding farm can be lowered by the air from the outdoor unit 42. Thereby, the breeding water W in the breeding tank 10 can be cooled.

[0077] On the other hand, in step S18, the control device 70 switches the switching damper 53 to the second state, and discharges the exhaust air from the outdoor unit 42 in the chamber 51 to the outdoors.

[0078] After performing the process of step S17 or step S18, the control device 70 ends the switching control shown in FIG.

[0079] In this way, in the aquaponics system 1 of this embodiment, the exhaust heat from the LED lighting 21 in the cultivation room 4, which is generated even in winter, can be used to adjust the air temperature in the aquaculture area 3, thereby reducing the energy costs associated with heating the air in the aquaculture area 3.

[0080] In addition, by appropriately switching the exhaust heat path of the LED lighting 21 according to the air temperature of the aquaculture farm 3, the air temperature of the aquaculture farm 3 can be appropriately controlled without causing excessive temperature increases or decreases in the aquaculture farm 3.

[0081] Next, the configuration of an aquaponics system 1A according to a second embodiment of the present invention will be described with reference to Figures 5 and 6. In the following, the same components as those in the first embodiment will be denoted by the same reference numerals and will not be described again.

[0082] The aquaponics system 1A according to the second embodiment includes a water jacket 80 and a refrigerant circulation unit 90 instead of the air supply device 50. The temperature detection unit 60 of the aquaponics system 1A according to the second embodiment includes a third temperature sensor 63 instead of the first temperature sensor 61 and the second temperature sensor 62.

[0083] The third temperature sensor 63 detects the temperature of the culture water W in the culture tank 10. The third temperature sensor 63 is provided inside the culture tank 10 so as to be able to detect the temperature of the culture water W in the culture tank 10.

[0084] The water jacket 80 allows a coolant (for example, water) to flow through it, thereby recovering (absorbing) the exhaust heat of the LED light 21. The water jacket 80 is provided near the part of the LED light 21 from which heat is dissipated.

[0085] The refrigerant circulation unit 90 is for circulating the refrigerant in the water jacket 80. The refrigerant circulation unit 90 includes a heat exchanger 91, a radiator 92, refrigerant piping 93, a pump 94, a switching valve 95, a first check valve 96, and a second check valve 97.

[0086] The heat exchanger 91 exchanges heat between the refrigerant flowing through the refrigerant piping 93 (described later) and the culture water W of the culture tank 10. The heat exchanger 91 is provided adjacent to the culture tank 10 so as to absorb heat from the refrigerant flowing through the refrigerant piping 93 (described later) and release heat to (provide heat to) the culture water W of the culture tank 10.

[0087] The radiator 92 dissipates heat from the refrigerant flowing through the refrigerant piping 93 described later. The radiator 92 is installed outdoors so that it can absorb heat from the refrigerant flowing through the refrigerant piping 93 described later and dissipate the heat outdoors of the building 2.

[0088] The refrigerant piping 93 is a path for circulating the refrigerant in the water jacket 80. The refrigerant piping 93 is formed by piping through which the refrigerant can flow. The refrigerant piping 93 includes a first refrigerant piping 93a, a second refrigerant piping 93b, a third refrigerant piping 93c, a fourth refrigerant piping 93d, and a fifth refrigerant piping 93e.

[0089] The first refrigerant pipe 93a is provided to connect the water jacket 80 to a switching valve 95, which will be described later.

[0090] The second refrigerant pipe 93b is provided to connect a switching valve 95 and the heat exchanger 91, which will be described later.

[0091] The third refrigerant pipe 93c is provided to connect the heat exchanger 91 and the water jacket 80 together.

[0092] The fourth refrigerant pipe 93d is provided to connect a switching valve 95 (described later) and the radiator 92.

[0093] The fifth refrigerant pipe 93e is provided to connect the radiator 92 and a midway portion of the third refrigerant pipe 93c.

[0094] The pump 94, when operated, circulates the refrigerant through the refrigerant pipe 93. The pump 94 is provided in the middle of the first refrigerant pipe 93a. More specifically, the pump 94 is provided between the water jacket 80 and the switching valve 95.

[0095] The switching valve 95 switches the destination of the refrigerant flowing through the refrigerant pipe 93. The switching valve 95 is provided at a portion where the first refrigerant pipe 93a, the second refrigerant pipe 93b, and the fourth refrigerant pipe 93d join (a portion where the refrigerant pipe 93 branches). The switching valve 95 is configured to be switchable between a third state in which the refrigerant flowing through the first refrigerant pipe 93a is supplied to the heat exchanger 91 via the second refrigerant pipe 93b, and a fourth state in which the refrigerant is supplied to the radiator 92 via the fourth refrigerant pipe 93d. By providing the switching valve 95 in this manner, the destination of the refrigerant flowing through the refrigerant pipe 93 (first refrigerant pipe 93a) can be switched between the heat exchanger 91 and the radiator 92.

[0096] The first check valve 96 prevents backflow of the refrigerant in the third refrigerant pipe 93 c. The first check valve 96 is provided in the middle of the third refrigerant pipe 93 c and can prevent the refrigerant from flowing back toward the heat exchanger 91 in the third refrigerant pipe 93 c.

[0097] The second check valve 97 prevents the refrigerant from flowing backward in the fifth refrigerant pipe 93 e. The second check valve 97 is provided in the middle of the fifth refrigerant pipe 93 e, and can prevent the refrigerant from flowing backward in the fifth refrigerant pipe 93 e toward the radiator 92.

[0098] The refrigerant pipe 93, pump 94, switching valve 95, first check valve 96 and second check valve 97 configured as described above are provided for each water jacket 80 provided in each of the multiple cultivation tanks 20.

[0099] 6, the control device 70 is configured to be able to communicate with the third temperature sensor 63. By receiving a signal from the third temperature sensor 63, the control device 70 can acquire the measurement result of the water temperature of the breeding water W in the aquaculture tank 10.

[0100] The control device 70 can control the operation of the pump 94. Furthermore, the control device 70 can switch the state of the switching valve 95 to a third state or a fourth state based on the measurement results. For example, the control device 70 can switch the supply destination of the refrigerant flowing through the refrigerant pipe 93 to the heat exchanger 91 by setting the switching valve 95 to the third state. Furthermore, the control device 70 can switch the supply destination of the refrigerant flowing through the refrigerant pipe 93 to the radiator 92 by setting the switching valve 95 to the fourth state.

[0101] The switching control by the control device 70 will be described below with reference to Fig. 7. The switching control shown in Fig. 7 is control for switching the supply destination of the refrigerant (the refrigerant containing the exhaust heat of the LED lamp 21) circulating through the refrigerant pipe 93. The switching control shown in Fig. 7 is executed repeatedly.

[0102] 7, the control device 70 determines whether the LED illumination 21 is on or not. If the LED illumination 21 is on (YES in step S21), the control device 70 proceeds to step S22. On the other hand, if the LED illumination 21 is not on (NO in step S21), the control device 70 ends the switching control shown in FIG.

[0103] In step S22, the control device 70 drives the pump 94 to circulate the refrigerant in the water jacket 80 through the refrigerant pipe 93. After performing the process of step S22, the control device 70 proceeds to step S23.

[0104] In step S23, the control device 70 determines whether the water temperature of the breeding water W in the breeding tank 10 (hereinafter referred to as the breeding tank water temperature T3) is lower than c (T3 < c). Here, "c" represents the lower limit value of the appropriate temperature range of the breeding tank water temperature T3. The breeding tank water temperature T3 is obtained based on the signal from the third temperature sensor 63. When T3 < c (YES in step S23), the control device 70 proceeds to step S24. On the other hand, when T3 is not less than c (T3 ≥ c, NO in step S23), the control device 70 proceeds to step S25.

[0105] Note that when T3 < c in step S23, it indicates that the breeding tank water temperature T3 is lower than the appropriate temperature range, so it is necessary to raise the breeding tank water temperature T3. On the other hand, when T3 is not less than c in step S23, it indicates that the breeding tank water temperature T3 is not lower than the appropriate temperature range, so it is not necessary to raise the breeding tank water temperature T3.

[0106] In step S24, the control device 70 switches the switching valve 95 to the third state and circulates the refrigerant through the heat exchanger 91. The heat exchanger 91 extracts heat (absorbs heat) from the refrigerant flowing through the second refrigerant pipe 93b and supplies (releases heat) the extracted heat to the breeding water W in the breeding tank 10. Thereby, the breeding water W in the breeding tank 10 can be heated. The refrigerant from which heat has been extracted by the heat exchanger 91 is returned to the water jacket 80 via the third refrigerant pipe 93c.

[0107] After performing the process of step S24, the control device 70 ends the switching control shown in FIG. 7.

[0108] On the other hand, in step S25, the control device 70 switches the switching valve 95 to the fourth state and circulates the refrigerant through the radiator 92. The radiator 92 extracts heat (absorbs heat) from the refrigerant flowing through the fourth refrigerant pipe 93d and releases (releases heat) the extracted heat to the outside of the building 2. The refrigerant from which heat has been extracted by the radiator 92 is returned to the water jacket 80 via the fifth refrigerant pipe 93e.

[0109] After performing the process of step S25, the control device 70 ends the switching control shown in FIG.

[0110] Thus, in the aquaponics system 1A of the second embodiment, the exhaust heat from the LED lighting 21 in the cultivation room 4, which is generated even in winter, can be used to adjust the temperature of the breeding water W in the aquaculture tank 10, thereby reducing the energy costs associated with heating the breeding water W in the aquaculture tank 10.

[0111] In addition, by appropriately switching the heat exhaust path of the LED lighting 21 according to the water temperature of the breeding water W in the aquaculture tank 10, the temperature of the breeding water W in the aquaculture tank 10 can be appropriately controlled without causing excessive temperature increases or decreases in the breeding water W in the aquaculture tank 10.

[0112] Furthermore, since the heat exhaust from the LED lighting 21 is processed by the water jacket 80, the thermal load of the air conditioner 40 is reduced. Therefore, the capacity of the air conditioner 40 can be reduced to perform cooling operation. This prevents excessive humidity reduction in the cultivation room 4 due to the operation of the air conditioner 40, and ultimately prevents a decrease in the production efficiency of the plants P.

[0113] As described above, the aquaponics systems 1 and 1A according to the first and second embodiments are An aquaponics system 1, 1A in which fish F are cultivated and plants P are cultivated using breeding water W in a building 2 having an aquaculture area 3 and a cultivation room 4, A culture tank 10 provided in the aquaculture facility 3 for cultivating fish F; a cultivation tank 20 provided in the cultivation room 4, having an LED light 21 (artificial light source) capable of irradiating light onto the plant P, and in which the plant P is cultivated; an exhaust heat recovery unit (air conditioner 40, water jacket 80) capable of recovering exhaust heat from the LED lighting 21; an exhaust heat supply unit (air supply device 50, refrigerant circulation unit 90) capable of supplying the exhaust heat recovered by the exhaust heat recovery unit to the aquaculture facility 3; It is equipped with the following.

[0114] By configuring in this way, the energy cost required to adjust the water temperature of the breeding water W can be reduced. Specifically, by utilizing the exhaust heat from the LED lighting 21 to adjust the temperature of the breeding water W in the aquaculture tank 10, it is possible to reduce the energy cost required to adjust the temperature of the breeding water W, particularly in winter.

[0115] In addition, in the aquaponics system 1 according to the first embodiment, The air supply device 50 (exhaust heat supply unit) a chamber 51 (exhaust heat storage section) capable of storing the exhaust heat; an air duct (52) capable of supplying the air containing the exhaust heat stored in the chamber (51) to the farm (3); It is equipped with the following.

[0116] With this configuration, the air in the aquaculture facility 3 can be heated by the air containing the exhaust heat from the LED lighting 21, and thus the temperature of the rearing water W in the aquaculture tank 10 can be prevented from decreasing. Furthermore, by temporarily storing the exhaust heat from the LED lighting 21 in the chamber 51, air containing the exhaust heat can be supplied to the fish farm 3 at an appropriate timing.

[0117] In addition, in the aquaponics system 1 according to the first embodiment, The air duct 52 is The air containing the exhaust heat is branched into a second duct 52b (first path) capable of supplying the air containing the exhaust heat to the aquaculture site 3, and a third duct 52c (second path) capable of opening the air containing the exhaust heat to the outside of the building 2, The air supply device 50 includes: It is equipped with a switching damper 53 (first switching unit) that can be switched between a first state in which the air containing the exhaust heat is supplied to the aquaculture facility 3 through the second duct 52b, and a second state in which the air is opened to the outdoors through the third duct 52c.

[0118] With this configuration, the supply destination of the exhaust heat from the LED lighting 21 can be switched as appropriate.

[0119] Also, the aquaponics system 1 according to the first embodiment includes a first temperature sensor 61 (first temperature detection unit) capable of detecting the temperature T1 of the aquaculture farm (the air temperature of the aquaculture farm 3), and a control device 70 (control unit) capable of switching the switching damper 53 to the first state when the temperature T1 of the aquaculture farm is lower than the lower limit value a (predetermined threshold value) of the appropriate temperature range of the temperature T1 of the aquaculture farm (T1 < a in step S11 of FIG. 4), and capable of switching the switching damper 53 to the second state when the temperature T1 of the aquaculture farm is not less than the lower limit value a (a ≤ T1 ≤ b in step S11 of FIG. 4). It is equipped with these.

[0120] By configuring it in this way, the waste heat of the LED lighting 21 can be supplied to the aquaculture farm 3 only when it is necessary to heat the breeding water W in the aquaculture tank 10. Specifically, when the temperature T1 of the aquaculture farm is lower than the lower limit value a of the appropriate temperature range of the temperature T1 of the aquaculture farm, it is determined that it is necessary to heat the air in the aquaculture farm 3, and the waste heat of the LED lighting 21 can be supplied to the aquaculture farm 3. On the other hand, when the temperature T1 of the aquaculture farm is not lower than the lower limit value a (not less than the lower limit value a), it is determined that it is not necessary to heat the air in the aquaculture farm 3, and the waste heat of the LED lighting 21 can be prevented from being supplied to the aquaculture farm 3.

[0121] Also, the aquaponics system 1 according to the first embodiment includes a second temperature sensor 62 (second temperature detection unit) capable of detecting the chamber temperature T2 (the air temperature of the chamber 51), and the control device 70 is capable of switching the first switching unit to the second state even when the temperature T1 of the aquaculture farm is lower than the lower limit value a and the chamber temperature T2 is not higher than the temperature T1 of the aquaculture farm (NO in step S13 of FIG. 4).

[0122] By configuring in this way, it is possible to prevent a situation in which the air in the chamber 51 cannot be heated even if it is supplied to the aquaculture farm 3.

[0123] In addition, in the aquaponics system 1A according to the second embodiment, The water jacket 80 (exhaust heat recovery section) is By circulating a refrigerant through a heat dissipation portion of the LED lighting 21, the exhaust heat of the LED lighting 21 can be recovered, The refrigerant circulation unit 90 (exhaust heat supply unit) a refrigerant pipe 93 for circulating the refrigerant containing the exhaust heat; a heat exchanger 91 capable of supplying the exhaust heat to the culture water W of the culture tank 10 by exchanging heat between the refrigerant circulating through the refrigerant piping 93 and the culture water W of the culture tank 10 or the culture water W supplied to the culture tank 10; It is equipped with the following.

[0124] With this configuration, the breeding water W in the aquaculture tank 10 can be heated by the refrigerant containing the exhaust heat from the LED lighting 21, and the temperature of the breeding water W in the aquaculture tank 10 can be optimized.

[0125] In addition, the aquaponics system 1A according to the second embodiment is a radiator 92 capable of radiating the exhaust heat to the outside of the building 2; The refrigerant piping 93 is the refrigerant pipe 93b (third path) is branched into a second refrigerant pipe 93b (third path) capable of supplying the refrigerant containing the exhaust heat to the heat exchanger 91, and a fourth refrigerant pipe 93d (fourth path) capable of supplying the refrigerant to the radiator 92; The refrigerant circulation unit 90 includes: The refrigerant piping 93 is equipped with a switching valve 95 (second switching unit) that can switch between a third state in which the refrigerant containing the exhaust heat is supplied to the heat exchanger 91 via the second refrigerant piping 93b, and a fourth state in which the refrigerant is supplied to the radiator 92 via the fourth refrigerant piping 93d.

[0126] With this configuration, the supply destination of the exhaust heat from the LED lighting 21 can be switched as appropriate.

[0127] In addition, the aquaponics system 1A according to the second embodiment is a third temperature sensor 63 (third temperature detection unit) capable of detecting a culture tank water temperature T3 (the temperature of the culture water W in the culture tank 10 or the culture water W supplied to the culture tank 10); a control device 70 that can switch the switching valve 95 to the third state when the aquaculture tank water temperature T3 in the aquaculture tank 10 is lower than a lower limit value c (a predetermined threshold value) of an appropriate temperature range for the aquaculture tank water temperature T3 (YES in step S23 of FIG. 7), and can switch the switching valve 95 to the fourth state when the aquaculture tank water temperature T3 is not lower than the lower limit value c (NO in step S23 of FIG. 7); It is equipped with the following.

[0128] With this configuration, the exhaust heat from the LED lighting 21 can be supplied to the culture water W of the culture tank 10 only when the culture water W of the culture tank 10 needs to be heated. Specifically, when the aquaculture tank water temperature T3 is below the lower limit c of the appropriate temperature range for the aquaculture tank water temperature T3, it is determined that the culture water W in the aquaculture tank 10 needs to be heated, and the exhaust heat from the LED lighting 21 can be supplied (dissipated) to the culture water W in the aquaculture tank 10. On the other hand, when the aquaculture tank water temperature T3 is not below the lower limit c (is equal to or greater than the lower limit c), it is determined that the culture water W in the aquaculture tank 10 does not need to be heated, and the exhaust heat from the LED lighting 21 can be prevented from being supplied to the culture water W in the aquaculture tank 10.

[0129] Although the embodiments of the present invention have been described above, the present invention is not limited to the above configurations and various modifications are possible within the scope of the invention described in the claims. Furthermore, the specific numerical values ​​exemplified in the above description are merely examples and can be modified as desired.

[0130] For example, the configuration of the aquaponics system 1, 1A described in each of the above embodiments is an example, and the configuration of each part that makes up the aquaponics system 1, 1A can be changed as appropriate within the scope of the invention described in the claims.

[0131] It is also possible to add various mechanisms that are effective for cultivating fish F and plants P to the aquaponics system 1. For example, it is possible to add an impurity removal mechanism that removes chlorine and impurities from fresh water (tap water), a sterilization mechanism that disinfects and sterilizes the breeding water W, a water temperature control mechanism that controls the temperature of the breeding water W, an oxygen supply mechanism that supplies oxygen to the breeding water W, etc.

[0132] Furthermore, although the farm 3 and the cultivation room 4 are arranged vertically, they may also be arranged side by side on a flat surface.

[0133] In addition, in the first embodiment, the exhaust heat from the LED lighting 21 contained in the exhaust air from the outdoor unit 42 of the air conditioning unit 40 is supplied to the air inside the aquaculture facility 3, but as in the second embodiment, it may also be supplied to the breeding water W in the aquaculture tank 10 via a heat exchanger or the like.

[0134] Furthermore, the water temperature adjustment of the rearing water W in the aquaculture tank 10 may be carried out using only the water temperature adjustment configuration of the rearing water W in the aquaculture tank 10 according to each embodiment, or may be carried out in combination with other conventional methods (for example, a "circulation method" in which the rearing water W is directly circulated to a heater / cooler to adjust the water temperature, a "cushion tank method" in which the water temperature is adjusted by cooling or heating water in a cushion tank and circulating it in a heat exchanger, or an "air conditioning control method" in which the entire aquaculture tank equipment is enclosed in a building and the water temperature is adjusted using an air conditioning unit in the building).

[0135] In the second embodiment, the heat exchanger 91 is provided adjacent to the aquaculture tank 10 so as to enable heat exchange between the refrigerant flowing through the refrigerant piping 93 and the culture water W in the aquaculture tank 10, but the heat exchanger 91 may be provided inside the filtration tank 30 (see FIG. 2) so as to enable heat exchange between the refrigerant flowing through the refrigerant piping 93 and the culture water W supplied to the aquaculture tank 10 in the filtration tank 30. In this case, the third temperature sensor 63 may also be provided inside the filtration tank 30 so as to be able to detect the temperature of the culture water W supplied to the aquaculture tank 10 in the filtration tank 30 (see FIG. 2).

[0136] Furthermore, in the second embodiment, the operation of the pump 94 is controlled by the control device 70 so as to be linked to the turning on and off of the LED illumination 21, but it may also be controlled by a timer. [Explanation of symbols]

[0137] 1. 1A Aquaponics System 2. Building 3 Fish farm 4 Cultivation room 10 Aquaculture tank 20 cultivation tank 21 LED lighting 40 Air conditioner 50 Air supply device 51 Chamber 52 Air Duct 53 Switching damper 61 First temperature sensor 62 Second temperature sensor 63 Third temperature sensor 70 Control device 80 Water Jacket 90 Refrigerant circulation section 91 Heat exchanger 92 Radiator 93 Refrigerant piping 95 Switching valve

Claims

1. An aquaponics system in which fish are cultivated and plants are grown using breeding water in a building having a farm and a cultivation room, Aquaculture tanks installed in the aquaculture farm for cultivating fish; a cultivation tank provided in the cultivation room, having an artificial light source capable of irradiating light to the plants, and cultivating the plants; a heat recovery unit capable of recovering the heat exhausted from the artificial light source; an exhaust heat supply unit capable of supplying the exhaust heat recovered by the exhaust heat recovery unit to the aquaculture facility; Equipped with Aquaponics system.

2. The exhaust heat supply unit is a waste heat storage section capable of storing the waste heat; an air duct capable of supplying the air containing the exhaust heat stored in the exhaust heat storage section to the aquaculture facility; Equipped with 2. The aquaponics system of claim 1.

3. The air duct is The air containing the exhaust heat is branched into a first path that can supply the air containing the exhaust heat to the aquaculture farm and a second path that can release the air containing the exhaust heat to the outside of the building, The exhaust heat supply unit is a first switching unit that can switch between a first state in which the air containing the exhaust heat is supplied to the aquaculture farm via the first path and a second state in which the air is released to the outdoors via the second path; 3. The aquaponics system of claim 2.

4. a first temperature detector capable of detecting the air temperature of the farm; a control unit capable of switching the first switch unit to the first state when the air temperature of the farm is below a predetermined threshold, and switching the first switch unit to the second state when the air temperature of the farm is equal to or greater than a predetermined threshold; Equipped with 4. The aquaponics system of claim 3.

5. a second temperature detection unit capable of detecting the air temperature of the exhaust heat storage unit; The control unit Even if the air temperature of the farm is below a predetermined threshold, the first switching unit can be switched to the second state if the air temperature of the exhaust heat storage unit is not higher than the air temperature of the farm.

5. The aquaponics system of claim 4.

6. The exhaust heat recovery unit is The exhaust heat of the artificial light source can be recovered by circulating a refrigerant through a heat dissipation portion of the artificial light source, The exhaust heat supply unit is a refrigerant pipe for circulating the refrigerant containing the exhaust heat; a heat exchanger capable of supplying the exhaust heat to the rearing water in the aquaculture tank by exchanging heat between the refrigerant circulating through the refrigerant pipe and the rearing water in the aquaculture tank or the rearing water to be supplied to the aquaculture tank; Equipped with 2. The aquaponics system of claim 1.

7. The exhaust heat supply unit is a radiator capable of radiating the exhaust heat to the outside of the building; The refrigerant piping is the refrigerant is branched into a third path that can supply the refrigerant containing the exhaust heat to the heat exchanger and a fourth path that can supply the refrigerant to the radiator, The exhaust heat supply unit is a second switching unit that is switchable between a third state in which the refrigerant containing the exhaust heat is supplied to the heat exchanger via the third path and a fourth state in which the refrigerant is supplied to the radiator via the fourth path; 7. The aquaponics system of claim 6.

8. a third temperature detection unit capable of detecting the temperature of the rearing water in the aquaculture tank or the rearing water supplied to the aquaculture tank; a control unit that can switch the second switching unit to the third state when the temperature of the breeding water in the aquaculture tank or the breeding water supplied to the aquaculture tank is lower than a predetermined threshold, and that can switch the second switching unit to the fourth state when the temperature of the breeding water in the aquaculture tank or the breeding water supplied to the aquaculture tank is not lower than a predetermined threshold; Equipped with 8. The aquaponics system of claim 7.

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