Liquid circulation device

Abstract

The invention provides a liquid circulation device which appropriately discharges a battery of a moving body. The liquid circulation apparatus includes: a circulation path including a supply path for supplying a discharge processing liquid to a battery of a moving body and a recovery path for recovering the supplied discharge processing liquid; a pump that circulates the discharge processing liquid in the circulation path; a cooling device that cools the discharge treatment liquid flowing through the circulation path; and a control device that controls the pump and the cooling device and supplies the discharge processing liquid having a predetermined temperature to the battery.

Description

Technical Field

[0001] The present invention relates to a liquid circulation device. Background Art

[0002] When a mobile object such as a multi-rotor aircraft using batteries as its energy source senses any abnormality in the aircraft during flight, it will make an emergency landing at the nearest airport. Fire extinguishing equipment for battery fires is installed at the airport that accepts emergency landings (see, for example, Patent Document 1).

[0003] Even if a battery fire is temporarily extinguished, if there is electricity remaining in the battery, there is a possibility that the fire will break out again. Therefore, it is desirable that a terminal for emergency landing of a mobile vehicle or the like has a device for appropriately discharging the battery.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2022-066797 Summary of the invention

[0007] Problems to be solved by the invention

[0008] An object of the present invention is to provide a device for appropriately discharging a battery of a mobile object.

[0009] Technical solutions for solving technical problems

[0010] In order to achieve the above object, one embodiment of the present invention is a liquid circulation device, comprising:

[0011] a circulation path including a supply path for supplying a discharge treatment liquid to a battery of a mobile body and a recovery path for recovering the supplied discharge treatment liquid;

[0012] a pump that circulates the discharge treatment liquid in the circulation path;

[0013] a cooling device that cools the discharge treatment liquid flowing in the circulation path; and

[0014] A control device controls the pump and the cooling device to supply the discharge treatment liquid at a predetermined temperature to the battery.

[0015] Effects of the Invention

[0016] According to the present invention, based on the flow rate and concentration of the discharge treatment liquid flowing in the circulation path, a pump for circulating the discharge treatment liquid in the circulation path and a concentration adjusting device for adjusting the concentration of the discharge treatment liquid flowing in the circulation path are controlled. Thus, the discharge treatment liquid with appropriately adjusted temperature and concentration can be supplied to the battery of the mobile body. Therefore, the battery of the mobile body can be appropriately discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a diagram showing the configuration of an emergency landing port according to an embodiment.

[0018] Figure 2 It is a top view of the emergency landing port in the embodiment.

[0019] Figure 3 This is a block diagram showing a schematic control structure of an emergency landing port according to an embodiment.

[0020] Figure 4 This is a flowchart showing the flow of the discharge process of the unmanned aerial vehicle performed at the emergency landing port according to the embodiment.

[0021] Figure 5 This is a diagram for explaining the discharge process when a worker is able to approach an unmanned aerial vehicle.

[0022] Figure 6 This figure is used to explain the discharge process when the staff cannot approach the unmanned aerial vehicle. DETAILED DESCRIPTION

[0023] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0024] [Composition of emergency landing port]

[0025] Figure 1 2 is a diagram showing the structure of the emergency landing port 1 according to the present embodiment. Figure 2 This is a top view of the emergency landing port 1.

[0026] like Figure 1 and Figure 2 As shown, the emergency landing port 1 of the present embodiment is a landing site where an unmanned aerial vehicle (hereinafter referred to as "drone") 100 performs an emergency landing when an abnormality of the unmanned aerial vehicle (hereinafter referred to as "drone") 100 is sensed. The emergency landing port 1 is an example of the liquid circulation device of the present invention.

[0027] The drone 100 is, for example, a multi-rotor aircraft capable of taking off and landing vertically using a plurality of rotor units (propellers) 121. Specifically, the drone 100 includes a main body 120 and a plurality of rotor units 121.

[0028] The plurality of rotor portions 121 are provided at the front ends of a plurality of arm portions 122 extending in four directions from the main body portion 120 .

[0029] The main body 120 is formed in a rectangular box shape and has a battery 130 and the like for supplying power to various parts of the drone 100. The battery 130 is detachably accommodated in a battery mount 132, for example.

[0030] The main body 120 is provided with a socket 124 to which a connector (plug) 35 described later is connected. The socket 124 is exposed, for example, on the lower surface of the main body 120, and is configured so that the connector 35 can be attached and detached from the outside.

[0031] The emergency landing port 1 includes a circulation unit 30 that circulates a discharge treatment liquid for discharging the battery 130 of the drone 100 between the landing platform 20 as a landing site of the drone 100 and the drone 100 .

[0032] The drop platform 20 is formed in a square concave shape in a plan view, and has a bottom 20a and a wall 20b. The drop platform 20 is made of, for example, a fire-resistant material.

[0033] A circular landing spot 20 c indicating a landing site for the drone 100 is arranged on the bottom 20 a of the landing platform 20 .

[0034] Inside the lowering platform 20, a step platform 20d for ascending and descending a worker is arranged along the inner side surface of each wall portion 20b.

[0035] In addition, the landing platform 20 may be damaged by the emergency landing of the drone 100, and therefore, it is preferably an easily replaceable structure such as an assembled structure.

[0036] As described later, the landing platform 20 also functions as a storage tank for the discharge treatment liquid for discharging the battery 130. Therefore, the height of the wall 20b is such that the discharge treatment liquid can be stored to a depth that submerges the battery 130 of the drone 100 when the drone 100 lands on the bottom 20a. In other words, the height of the wall 20b is higher than the position of the battery 130 of the drone 100 that lands on the bottom 20a.

[0037] The landing platform 20 is provided with a device unit 25 having various devices for supporting the emergency landing of the drone 100. The device unit 25 is not particularly limited, and is provided, for example, on the upper part of the wall 20b.

[0038] The equipment unit 25 of the present embodiment includes a guide device 26 , a fire extinguishing agent release port 27 , various sensors 28 , and an inert gas release port 29 .

[0039] The guidance device 26 guides the drone 100 to the landing point 20c when performing a landing operation. The guidance device 26 includes, for example, a guidance radar (or a light emitting unit) for guiding the drone 100, a communication unit for transmitting position information of the emergency landing port 1, and the like.

[0040] The fire extinguishing agent release port 27 is connected to a fire extinguishing agent tank or a cylinder to release the fire extinguishing agent to the drone 100 that has landed on the landing point 20c.

[0041] The various sensors 28 include various sensors for remotely (non-contact) observing the state of the drone 100. The various sensors 28 include, for example, temperature sensors, gas detectors, voltmeters, etc. The various sensors 28 may include an anemometer for supporting the landing action of the drone 100, etc.

[0042] The inert gas release port 29 is connected to an inert gas tank or a cylinder to release the inert gas to the drone 100 landing on the landing point 20c. The inert gas prevents the gas generated by the discharge process of the battery 130 from igniting.

[0043] [Composition of the cycle unit]

[0044] The circulation unit 30 circulates the discharge treatment solution for discharging the battery 130 to the drone 100 that has landed on the landing platform 20 .

[0045] The discharge treatment liquid circulated by the circulation unit 30 is not particularly limited as long as it promotes the discharge of the battery 130 (battery cell). For example, the discharge treatment liquid is a sodium chloride aqueous solution (e.g., salt water) of a predetermined concentration, water, an anionic surfactant described in Japanese Patent No. 6847716, an aqueous solution of an alkali metal weak acid salt described in Japanese Patent Laid-Open No. 2005-347162, etc.

[0046] Specifically, the circulation unit 30 includes a circulation path 31 of the discharge treatment liquid. The circulation path 31 includes two systems of a first circulation path 31a and a second circulation path 31b.

[0047] The first circulation path 31a and the second circulation path 31b each include a supply path 32 for supplying the discharge treatment liquid to the drone 100 and a recovery path 33 for recovering the supplied discharge treatment liquid. The first circulation path 31a includes a first supply path 32a and a first recovery path 33a. The second circulation path 31b includes a second supply path 32b and a second recovery path 33b.

[0048] The front ends of the first supply path 32a and the first recovery path 33a on the drone 100 side are connected to the connector 35. The connector 35 is configured to be attachable to and detachable from the socket 124 of the drone 100. When the connector 35 is not connected to the socket 124, the first supply path 32a and the first recovery path 33a are blocked in the connector 35. On the other hand, when the connector 35 is connected to the socket 124, the first supply path 32a and the first recovery path 33a are connected to the inside of the battery 130 (or the inside of the battery mounting bracket 132) through the socket 124.

[0049] In addition, the connector 35 is connected to an exhaust device 49 via an exhaust path 36. The exhaust device 49 absorbs gas generated from the battery 130 during the discharge process and safely recovers the gas.

[0050] The discharge port 37 at the front end of the second supply path 32b on the drone 100 side opens on the inner side surface of the wall portion 20b of the landing platform 20. In the present embodiment, the downstream side portion of the second supply path 32b is branched into a plurality of discharge ports 37 from the middle (for example, a valve 47 described later), and the plurality of discharge ports 37 are arranged substantially evenly over the entire circumference of the entire wall portion 20b.

[0051] The suction port 38 at the front end of the second recovery path 33b on the drone 100 side opens on the bottom 20a of the landing platform 20. In this embodiment, the second recovery path 33b branches into four, and the four suction ports 38 open at four corners of the bottom 20a in a plan view.

[0052] That is, in the second circulation path 31 b , the discharge port 37 of the second supply path 32 b and the suction port 38 of the second recovery path 33 b communicate with each other through the internal space of the drop stage 20 .

[0053] The first supply path 32a and the second supply path 32b share a portion on the upstream side, and branch off on the downstream side from the valve 47. The valve 47 switches the supply of the discharge treatment liquid to the first supply path 32a, the second supply path 32b, or both.

[0054] A pump 41, a concentration adjusting device 42, a cooler 43, a filter 44, a first measuring unit 45, and a second measuring unit 46 are arranged in the circulation path 31. These are integrally accommodated in a housing 40 of the circulation unit 30, for example.

[0055] In addition, in this embodiment, for convenience, the starting point of the supply path 32 (the end point of the recovery path 33) is used as the filter 44. However, the starting point of the supply path 32 (the end point of the recovery path 33) is not particularly limited as long as it is a portion of the supply path 32 or the recovery path 33 that is not branched into the first and second parts, and it may be the pump 41, for example.

[0056] The pump 41 circulates the discharge treatment liquid in the circulation path 31 .

[0057] The concentration adjusting device 42 adjusts the concentration of the discharge treatment liquid flowing in the circulation path 31. The concentration adjusting device 42 also serves as a buffer tank of the circulation path 31.

[0058] The cooler 43 cools the discharge treatment liquid flowing in the circulation path 31. The cooler 43 is provided with a bypass path 34 having a bypass valve 48 in parallel.

[0059] The filter 44 removes pollutants from the discharge treatment liquid after the discharge treatment of the battery 130. The filter 44 is connected to the first recovery path 33a and the second recovery path 33b individually.

[0060] The first measuring unit 45 and the second measuring unit 46 each include a flow meter and a temperature meter.

[0061] The pump 41 , the concentration adjusting device 42 , and the cooler 43 are arranged in this order from the downstream side in the unbranched upstream side portion of the supply path 32 .

[0062] The first measuring unit 45 is disposed on the downstream side of the valve 47 in the first supply path 32a. The first measuring unit 45 measures the flow rate and temperature of the discharge treatment liquid flowing in the first supply path 32a toward the connector 35.

[0063] The second measuring unit 46 is disposed in the first recovery path 33a. The second measuring unit 46 measures the flow rate and temperature of the discharge treatment liquid flowing in the first recovery path 33a.

[0064] Figure 3 This is a block diagram showing a schematic control structure of the emergency landing port 1.

[0065] As shown in the figure, the emergency landing port 1 includes an operation unit 51 , a display unit 52 , and a control unit 57 in addition to the above-mentioned configuration.

[0066] The operation unit 51 is an operation device for a worker (user) to perform various operations. The operation unit 51 includes, for example, various buttons, and outputs an operation signal corresponding to the operation content to the control unit 57.

[0067] Display unit 52 is a display such as a liquid crystal, and displays various information according to a display signal input from control unit 57. Display unit 52 may be a touch panel also serving as a part of operation unit 51, or may include a speaker capable of displaying (outputting) voice.

[0068] The control unit 57 is composed of, for example, a CPU (Central Processing Unit) and controls the operation of each part of the emergency landing port 1. For example, the control unit 57 expands a program pre-stored in a storage unit (not shown) according to the operation content of the operation unit 51, and performs various processes in cooperation with the expanded program.

[0069] [Discharge process of the drone at emergency landing port 1]

[0070] Next, the discharge process of the drone 100 executed at the emergency landing port 1 will be described.

[0071] Figure 4 : is a flowchart showing the flow of the discharge process. Figure 5 is a diagram for explaining the discharge process when a worker can approach the drone 100; Figure 6 This is a diagram for explaining the discharge process when the worker cannot approach the drone 100.

[0072] The emergency landing port 1 allows an unmanned aerial vehicle 100 whose battery 130 has abnormally heated up during flight to make an emergency landing and discharge the battery 130 .

[0073] Here, it is assumed that the drone 100 has landed at the landing point 20c of the landing platform 20. When the drone 100 lands, the landing of the drone 100 may be supported by the guidance device 26 or the like.

[0074] like Figure 4 As shown, first, the staff determines whether it is safe to approach the landed drone 100 (step S1).

[0075] Here, the worker determines whether to approach the drone 100 by visually checking whether there is smoke or fire, for example. Alternatively, the detection values ​​of various sensors 28 (such as a temperature sensor) of the equipment unit 25 can be used to determine the material.

[0076] <Situations where staff can approach the drone>

[0077] In step S1 , when it is determined that the drone 100 can be approached safely (step S1 : Yes), the worker attaches the connector 35 of the circulation unit 30 to the socket 124 of the drone 100 (step S2 ).

[0078] Next, the worker operates the operating unit 51, for example, to operate the circulation unit 30, thereby circulating the discharge treatment liquid in the first circulation path 31a (step S3).

[0079] So, if Figure 5As shown, the discharge treatment liquid in the concentration adjusting device 42 also serving as a tank is supplied to the battery 130 (or the battery mounting rack 132) via the first supply path 32a by the pump 41. The battery 130 is cooled by the discharge treatment liquid and starts to discharge.

[0080] The discharge treatment liquid supplied to the battery 130 is recovered by the filter 44 through the first recovery path 33a connected to the connector 35, and pollutants are removed. The discharge treatment liquid passes through the cooler 43 (or the bypass path 34) and the concentration adjusting device 42, and is supplied to the battery 130 again by the pump 41.

[0081] When the circulation of the discharge treatment liquid in the first circulation path 31a starts, the control unit 57 controls the temperature, flow rate, and concentration of the discharge treatment liquid (step S4).

[0082] Specifically, the control unit 57 measures the temperature of the discharge treatment liquid flowing in the first supply path 32a and the first recovery path 33a through the first measuring unit 45 and the second measuring unit 46. Then, the control unit 57 controls the operation of the cooler 43 and the bypass valve 48 based on the temperature information of the discharge treatment liquid before and after the battery 130, and manages the temperature of the circulating discharge treatment liquid. As a result, for example, the discharge treatment liquid supplied to the battery 130 is kept below a predetermined temperature. In addition, the thermometer of the cooler 43 can be used instead of each thermometer of the first measuring unit 45 and the second measuring unit 46.

[0083] In addition, the control unit 57 adjusts the concentration of the discharge treatment liquid through the concentration adjusting device 42. When the discharge treatment liquid is, for example, a sodium chloride aqueous solution (salt water), the concentration is adjusted to compensate for the dilution caused by electrolysis.

[0084] In addition, the control unit 57 measures the flow rates of the discharge treatment liquid flowing in the first supply path 32a and the first recovery path 33a respectively through the first measuring unit 45 and the second measuring unit 46. Then, the control unit 57 controls the operation of the pump 41 based on the flow rate information (flow rate difference) of the discharge treatment liquid before and after the battery 130, and adjusts the flow rate of the discharge treatment liquid supplied to the battery 130. That is, the flow rate difference of the discharge treatment liquid before and after the battery 130 means that the discharge treatment liquid leaks from the outer shell of the battery 130 (or the battery mounting frame 132). Therefore, the control unit 57 adjusts the flow rate of the discharge treatment liquid supplied to the battery 130 based on the flow rate difference of the discharge treatment liquid before and after the battery 130, for example, by increasing the supply flow rate when there is a lot of leakage.

[0085] Furthermore, here, the control unit 57 operates the exhaust device 49 to safely collect the gas generated by the discharge of the battery 130 through the exhaust path 36 .

[0086] Next, the control unit 57 determines whether the temperature of the discharge treatment liquid is stable at or below a predetermined temperature (step S5). The temperature of the discharge treatment liquid is determined by a thermometer of the cooler 43 or a thermometer of the first measuring unit 45 or the second measuring unit 46.

[0087] When the discharge treatment liquid maintains a state below a predetermined temperature for a predetermined time or longer, the control unit 57 determines that the temperature of the discharge treatment liquid is stable below a predetermined temperature. Here, the predetermined temperature is, for example, a temperature at which it can be determined that the possibility of the battery 130 catching fire again is sufficiently low.

[0088] Then, when it is determined that the temperature of the discharge treatment liquid is not stabilized at or below the predetermined temperature (step S5: No), the control unit 57 shifts the process to the above-mentioned step S4 to continue controlling the temperature, flow rate and concentration of the discharge treatment liquid.

[0089] On the other hand, when it is determined in step S5 that the temperature of the discharge treatment liquid is stable at or below the predetermined temperature (step S5: Yes), the control unit 57 stops the circulation of the discharge treatment liquid (step S6) and ends the discharge treatment.

[0090] <Situations where staff cannot approach the drone>

[0091] In step S1 , for example, if it is determined that the worker cannot safely approach the drone 100 due to smoke or fire in the main body 120 (step S1 : No), the worker activates the fire extinguishing equipment of the equipment unit 25 (step S12 ).

[0092] Then, the fire extinguishing agent is released from the fire extinguishing agent release port 27 of the equipment unit 25 to the drone 100 landing on the landing point 20c. At this time, the various sensors 28 of the equipment unit 25 detect the temperature and the like of the drone 100 landing on the landing point 20c.

[0093] Next, the worker operates the operating unit 51, for example, to operate the circulation unit 30, thereby circulating the discharge treatment liquid in the second circulation path 31b (step S13).

[0094] In addition, at this time, if it can be determined that the smoke or fire of the drone 100 has stopped, the temperature has dropped sufficiently, and the possibility of re-fire is also small, the discharge process can be ended. That is, if the staff determines that the smoke or fire has not been extinguished, or there is a risk of re-fire, step S13 can be executed.

[0095] So, if Figure 6As shown, the discharge treatment liquid in the concentration adjustment device 42 which also serves as a tank is released from the release port 37 to the inside of the landing platform 20 via the second supply path 32b by the pump 41. The discharge treatment liquid is stored in the concave landing platform 20 and submerges the battery 130 of the drone 100 (step S14). As a result, the battery 130 is cooled and discharge begins.

[0096] The discharge treatment liquid stored in the drop table 20 is sucked from the suction port 38, and is recovered by the filter 44 through the second recovery path 33b to remove pollutants. The discharge treatment liquid passes through the cooler 43 (or the bypass path 34) and the concentration adjustment device 42, and is supplied to the drop table 20 again by the pump 41.

[0097] When the circulation of the discharge treatment liquid in the second circulation path 31 b starts, the control section 57 controls the temperature and concentration of the discharge treatment liquid (step S15 ).

[0098] Specifically, the control unit 57 measures the temperature of the discharge treatment liquid in the cooler 43, for example, using a thermometer provided in the cooler 43. Then, the control unit 57 controls the operation of the cooler 43 and the bypass valve 48 based on the measured temperature information of the discharge treatment liquid, and manages the temperature of the circulating discharge treatment liquid. Thus, for example, the discharge treatment liquid supplied to the battery 130 is kept at a predetermined temperature or less.

[0099] In addition, the control unit 57 adjusts the concentration of the discharge treatment liquid through the concentration adjusting device 42. For example, when the discharge treatment liquid is a sodium chloride aqueous solution (salt water), the concentration is adjusted to compensate for the dilution caused by electrolysis.

[0100] Furthermore, here, the control unit 57 releases the inert gas from the inert gas release port 29 of the equipment unit 25 toward the drone 100. This suppresses ignition caused by the gas generated by the discharge of the battery 130.

[0101] Next, the control unit 57 determines whether the temperature of the discharge treatment liquid is stable at a predetermined temperature or less, for example, using a thermometer provided in the cooler 43 (step S16).

[0102] When the discharge treatment liquid maintains a state below a predetermined temperature for a predetermined time or longer, the control unit 57 determines that the temperature of the discharge treatment liquid is stable below a predetermined temperature. Here, the predetermined temperature is, for example, a temperature at which it can be determined that the possibility of the battery 130 catching fire again is sufficiently low.

[0103] Then, when it is determined that the temperature of the discharge treatment liquid is not stabilized at or below the predetermined temperature (step S16: No), the control unit 57 shifts the process to the above-mentioned step S15 to continue controlling the temperature and concentration of the discharge treatment liquid.

[0104] On the other hand, when it is determined in step S16 that the temperature of the discharge treatment liquid is stabilized at or below the predetermined temperature (step S16: Yes), the control unit 57 stops the circulation of the discharge treatment liquid (step S17) and ends the discharge treatment.

[0105] [Technical Effects of the Present Embodiment]

[0106] As described above, according to this embodiment, the control unit 57 controls the pump 41 for circulating the discharge treatment liquid in the circulation path 31 and the cooler 43 for cooling the discharge treatment liquid flowing in the circulation path 31 to supply the discharge treatment liquid at a predetermined temperature to the battery 130 .

[0107] Thus, the discharge treatment liquid having an appropriately adjusted temperature can be stably supplied to the battery 130 of the drone 100. Therefore, the battery 130 of the drone 100 can be appropriately discharged.

[0108] According to the present embodiment, the circulation path 31 (first circulation path 31 a ) is configured to be mountable on the drone 100 , and includes a connector 35 that connects the first supply path 32 a and the first recovery path 33 a .

[0109] Thus, by attaching the connector 35 to the drone 100 , the discharge treatment liquid can be directly supplied to the battery 130 and recovered. In addition, the battery 130 can be appropriately discharged.

[0110] According to the present embodiment, the landing platform 20 can store the discharge treatment liquid, and has a depth such that the battery 130 of the drone 100 is submerged in the liquid (discharge treatment liquid) in the landing platform 20 when the drone 100 stops at the bottom 20 a of the landing platform 20 .

[0111] Thus, even when it is impossible to safely approach the drone 100 , the battery 130 of the drone 100 can be flooded with the discharge treatment liquid in the landing platform 20 and discharged.

[0112] In addition, according to this embodiment, it includes a first circulation path 31a and a second circulation path 31b. The first circulation path 31a circulates the discharge treatment liquid directly to the battery 130 of the drone 100 through the connector 35, and the second circulation path 31b circulates the discharge treatment liquid in the landing platform 20 that can submerge the battery 130.

[0113] Thus, the battery 130 can be appropriately discharged in either case when the worker can approach the drone 100 or when the worker cannot approach the drone 100 .

[0114] Furthermore, according to the present embodiment, the concentration adjusting device 42 is controlled according to the concentration of the discharge treatment liquid flowing in the circulation path 31 .

[0115] Thereby, the discharge treatment liquid of an appropriate concentration can be supplied to the battery 130. Furthermore, the battery 130 can be discharged appropriately.

[0116] Furthermore, according to the present embodiment, predetermined impurities are removed from the discharge treatment liquid circulating in the circulation path 31 by the filter 44 .

[0117] Thereby, impurities and the like mixed in the discharge treatment liquid can be appropriately removed.

[0118] [other]

[0119] As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment (including a modification).

[0120] For example, the landing platform 20 of the emergency landing port 1 can be used as long as it can store the discharge treatment liquid, and can also be simply an inflatable plastic pool, etc. In this case, the second supply path 32b and the second recovery path 33b can be pipes, etc. that can be arranged on the landing platform 20. The equipment unit 25 can be configured to be installed independently of the landing platform 20, and if fire extinguishing equipment can be prepared separately, the equipment unit 25 can also be omitted.

[0121] Thus, by providing the emergency landing port 1 with a simple structure, it can be installed regardless of the location, and for example, it can also appropriately cope with outdoor activities and the like.

[0122] In the discharge process of the above embodiment, either the first circulation path 31a or the second circulation path 31b is used. However, for example, in the case where a fire occurs after approaching the drone 100, the first circulation path 31a and the second circulation path 31b may be used simultaneously. This switching can be done by appropriately adjusting the opening of the valve 47.

[0123] In addition, the shape, structure, etc. of the connector 35 mounted on the socket 124 of the drone 100 are not particularly limited. For example, the first supply path 32a, the first recovery path 33a, and the exhaust path 36 may be connected to the drone 100 separately.

[0124] In addition, in the above-mentioned embodiment, an unmanned aerial vehicle (drone) capable of vertical take-off and landing is cited as an example of a mobile body of the present invention. However, the present invention can be widely applied to mobile bodies equipped with batteries (such as vehicles and ships, or model toys thereof, etc.).

[0125] In the above-mentioned embodiment, the case where the liquid circulation device of the present invention is applied to the emergency landing port of the unmanned aircraft is described. However, the liquid circulation device of the present invention is not limited to the emergency landing port, and can be widely applied to devices for discharging batteries.

[0126] In addition, the details shown in the above-mentioned embodiment can be appropriately changed within the scope not departing from the gist of the invention.

[0127] Explanation of symbols

[0128] 1 Emergency landing port (liquid circulation device)

[0129] 20 landing platform (storage device)

[0130] 20a bottom

[0131] 20b Wall

[0132] 25 equipment units

[0133] 30 cycle units

[0134] 31 loop paths

[0135] 31a First circulation path

[0136] 31b Second loop path

[0137] 32 Supply Paths

[0138] 32a First supply path

[0139] 32b Second supply path

[0140] 33 Recycling Path

[0141] 33a First recycling path

[0142] 33b Second recycling path

[0143] 35 Connectors

[0144] 41 Pumps

[0145] 42Concentration adjustment device (concentration adjustment unit)

[0146] 43 Cooler (cooling device)

[0147] 44 Filters

[0148] 45 First measurement unit

[0149] 46 Second measurement unit

[0150] 57 control unit (control device)

[0151] 100 Unmanned aerial vehicles (mobile)

[0152] 120 Main body

[0153] 130 battery

[0154] 132 battery mounting bracket.

Claims

1. A liquid circulation device, comprising: a circulation path including a supply path for supplying a discharge treatment liquid to a battery of a mobile body and a recovery path for recovering the supplied discharge treatment liquid; a pump that circulates the discharge treatment liquid in the circulation path; a cooling device that cools the discharge treatment liquid flowing in the circulation path; and A control device controls the pump and the cooling device to supply the discharge treatment liquid at a predetermined temperature to the battery.

2. The liquid circulation device according to claim 1, wherein: The circulation path includes a connector configured to be mountable on the moving body. The supply path includes a first supply path connected to the connector, The recovery path includes a first recovery path connected to the connector.

3. The liquid circulation device according to claim 1 or 2, comprising: a storage device for storing the discharge treatment liquid, wherein the supply path includes a second supply path for supplying the discharge treatment liquid to the interior of the storage device, The recovery path includes a second recovery path for recovering the discharge treatment liquid from the interior of the storage device, The storage device has a depth such that the battery of the moving body is submerged in the liquid in the storage device when the moving body stops at the bottom of the storage device.

4. The liquid circulation device according to claim 1, comprising: a concentration adjusting device for adjusting the concentration of the discharge treatment liquid flowing in the circulation path, The control device controls the concentration adjusting device according to the concentration of the discharge treatment liquid flowing in the circulation path.

5. The liquid circulation device according to claim 1, comprising: A filter removes predetermined impurities from the discharge treatment liquid circulating in the circulation path.

Images