Automated fire suppression system for enclosed vehicle compartments

Abstract

The utility model discloses an automatic fire extinguishing system for closed carriage, adopts the fire control water fire extinguishing unit and fire extinguisher fire extinguishing unit of automatic control, and in use, the fire control water unit and fire extinguisher unit can be controlled in the order of use, simultaneous use or selective use, can according to the goods loaded between the both and select the corresponding fire extinguishing unit of opening, and simultaneous use and according to the fire extinguishing situation uses in order, and generally adopts water -based fire extinguishing, has higher fire extinguishing efficiency, and cost is lower, simultaneously, for special goods can adopt fire extinguisher fire extinguishing (the fire extinguishing agent in fire extinguisher can be selectively replaced), therefore, the combination of both can basically be applicable to all kinds of goods, has the universality to the goods kind.

Description

Technical Field

[0001] This utility model relates to a vehicle auxiliary safety system, and more particularly to an automated fire extinguishing system for enclosed vehicle compartments. Background Technology

[0002] Enclosed wagons are a type of freight wagon that are completely enclosed in structure. They can protect the transported goods from the influence of the external environment and are generally used to transport goods that are easily contaminated, fragile, or of high value.

[0003] In actual use, because the enclosed compartment is isolated from the outside world, its heat dissipation is poor. Therefore, heat may accumulate during the transportation of goods, potentially causing a fire. In the early stages of a fire, it is not easily detected, or even if it is detected, the enclosed compartment makes firefighting difficult, leading to a major disaster.

[0004] To address the aforementioned issues, some improvements have emerged. For instance, patent (CN201620209570) discloses an automatic fire extinguishing device for vans. This device comprises a controller, a gas valve, a dry ice fire extinguisher canister, a smoke detector, a solenoid valve, fire extinguishing nozzles, and piping. When a fire occurs inside the van, the smoke detector at the corresponding location triggers a fire alarm signal, causing the controller to activate the solenoid valve at the corresponding location, opening the fire extinguishing nozzles to extinguish the fire. This system enables automated fire suppression. However, while dry ice fire extinguishers have a wide range of applications, their cost is relatively high due to the size of the van and the need to reach every corner. Furthermore, their extinguishing effect is not as good as commonly used water-based fire extinguishers. Of course, there are also existing vans that use water for automatic fire extinguishing, but they share the same application problem as dry ice fire extinguishers: they lack versatility. Water cannot be used to extinguish fires involving certain special goods, such as light, flammable chemicals like oil, leaving safety hazards unresolved.

[0005] Therefore, it is necessary to improve the fire extinguishing system of enclosed carriages to achieve higher fire extinguishing efficiency and applicability to a variety of goods, making it versatile. Utility Model Content

[0006] In view of this, the present invention provides an automated fire extinguishing system for enclosed carriages, which has high fire extinguishing efficiency and is also applicable to goods with various characteristics, thus having versatility.

[0007] The present invention relates to an automated fire extinguishing system for enclosed train carriages, comprising: A fire-fighting water unit includes a water tank and a number of fire-fighting water nozzles distributed on the ceiling inside the vehicle, wherein the fire-fighting water nozzles are closable and connected to the water tank. The fire extinguisher unit includes a fire extinguisher and several fire extinguisher nozzles distributed on the ceiling inside the carriage, wherein the fire extinguisher nozzles are closable and connected to the fire extinguisher. The monitoring unit is used to monitor fire information inside the carriage; The control unit is used to receive fire information from the monitoring unit and to open or close the fire sprinkler head and / or fire extinguisher head according to the fire information. The fire water unit and fire extinguisher unit can be used sequentially, simultaneously, or selectively.

[0008] Furthermore, the fire-fighting water unit also includes a flame retardant storage unit, which is connected to the water tank and can be controlled to open and close by a control unit.

[0009] Furthermore, the fire-fighting water unit also includes a rainwater collection unit, which is capable of collecting rainwater and: Transported to the water tank; Alternatively, it can be connected to the fire sprinkler head in an openable / closeable manner.

[0010] Furthermore, the rainwater collection unit filters the collected rainwater and then delivers it to a water tank, or stores it itself.

[0011] Furthermore, the fire sprinkler head is connected to the water tank via a fire water pipe arranged on the ceiling inside the carriage, which can be opened and closed. Alternatively, the fire sprinkler head is switchably and closably connected to the water tank and the rainwater collection unit via a fire water pipe arranged on the ceiling inside the carriage. The fire extinguisher nozzle is connected to the fire extinguisher via a fire extinguisher pipe located on the ceiling inside the carriage. Furthermore, the monitoring unit includes smoke sensors and / or heat source sensors distributed on the ceiling inside the carriage.

[0012] Furthermore, the water tank is positioned at the front upper part of the exterior of the carriage, and the fire extinguisher is positioned within the fire extinguisher receiving cavity formed by the deformation of the water tank in shape.

[0013] Furthermore, each of the aforementioned fire sprinklers, individually or in groups, is connected to the water tank via a corresponding fire sprinkler solenoid valve that can be opened and closed. Alternatively, several of the fire sprinklers may be individually or in groups, switchable, and connected to the water tank and the rainwater collection unit via corresponding fire sprinkler solenoid valves. Each of the aforementioned fire extinguisher nozzles, individually or in groups, is connected to the fire extinguisher via a corresponding fire extinguisher nozzle solenoid valve that can be opened and closed.

[0014] Furthermore, the flame retardant storage unit is located at the top of the water tank and is connected to the water tank by a control unit through a flame retardant solenoid valve.

[0015] Furthermore, the inlet end of the fire water pipeline is equipped with a fire pump, which is used to draw water from the water tank and deliver it to the fire pipeline; or, the fire pump is equipped with a first inlet and a second inlet that can be opened and closed, and the first inlet and the second inlet are respectively connected to the water tank and the rainwater collection unit that can be opened and closed.

[0016] The beneficial effects of this utility model are as follows: The automated fire extinguishing system for enclosed carriages of this utility model adopts an automatically controlled fire water extinguishing unit and a fire extinguisher extinguishing unit. In use, the fire water unit and the fire extinguisher unit can be used sequentially, simultaneously, or selectively. The appropriate extinguishing unit can be activated according to the cargo being loaded, or, under certain conditions, both can be used simultaneously to improve fire extinguishing efficiency, or they can be used sequentially according to the fire situation. Under normal circumstances, water-based fire extinguishing is used, which has high fire extinguishing efficiency and low cost. At the same time, fire extinguishers can be used for special cargo (the extinguishing agent in the fire extinguisher can be selectively replaced). Therefore, the combination of the two can be applied to almost all types of cargo and has versatility. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a layout diagram of the fire extinguishing system of this utility model; Figure 3 This is a rear view of the water tank; Figure 4 This is a cross-sectional schematic diagram of a rainwater harvesting unit; Figure 5 This is a cross-sectional schematic diagram of the flame retardant storage unit; Figure 6 This is a control block diagram of the present invention. Detailed Implementation

[0019] like Figure 1 and Figure 6 As shown: The automated fire suppression system for enclosed train carriages in this embodiment includes: The fire-fighting water unit includes a water tank 2 and a number of fire sprinklers 9 distributed on the top of the carriage 1. The fire sprinklers 9 are closable and connected to the water tank 2. The location and shape of the water tank 2 are not limited. It can be placed outside, inside, on top, in the middle or even at the bottom of the carriage, and all can achieve the purpose of the utility model. It is preferred to install it on the top. Further details will not be provided here. The fire extinguisher unit includes a fire extinguisher 5 and several fire extinguisher nozzles 10 distributed on the ceiling of the carriage. The fire extinguisher nozzles 10 are closable and connected to the fire extinguisher 5. The fire extinguisher 5 of the fire extinguisher unit generally includes a container and an extinguishing agent inside. The container is selected with an appropriate volume as needed and is generally detachably installed on the outside, inside, top, middle or even bottom of the carriage. The container contains an extinguishing agent. The type of extinguishing agent can be added or replaced as a whole according to the type of goods transported in the carriage, which will not be elaborated here. The extinguishing agent can be a commonly used dry powder extinguishing agent, dry ice extinguishing agent, etc., which will not be elaborated here. The monitoring unit is used to monitor fire information inside the carriage; conventional fire monitoring equipment, such as smoke, heat sensors, and video monitoring, can be used to achieve the purpose of this utility model, and will not be described in detail here. The control unit is used to receive fire information from the monitoring unit and to open or close the fire sprinkler head and / or fire extinguisher head according to the fire information. The control unit can be a single-chip microcomputer control structure of existing technology, or it can directly utilize the ECU system on the vehicle to achieve simple control. The fire water unit and fire extinguisher unit can be used sequentially, simultaneously, or selectively. During use, this invention allows for selection of either the fire water unit or the fire extinguisher unit in the event of a fire, depending on the type of goods (the selected extinguishing method is input into the control unit beforehand). Alternatively, both can be used simultaneously (provided the fire is permissible), improving extinguishing efficiency. Furthermore, they can be used sequentially depending on the fire situation (e.g., fire water depleted but fire not extinguished), to completely eliminate the fire; details will not be elaborated further here. This invention solves the problem of existing technologies having a single extinguishing method that is unsuitable for the versatility of vans in handling various types of goods. The distribution of fire sprinkler heads 9 and fire extinguisher heads 10 is designed to achieve a state of fire suppression without dead angles, based on the characteristics of fire water extinguishing and fire extinguisher extinguishing. Under normal conditions, the two are used in parallel, which will not be elaborated here. Figure 2 The fire sprinkler head 9 and the fire extinguisher nozzle 10 are only schematic diagrams. Their actual structures are not the same. They are designed to accommodate the spraying of fire water and the spraying of fire extinguishing agent, respectively. They are conventional fire water and fire extinguishing agent spraying structures, which will not be described in detail here.

[0020] In this embodiment, the fire-fighting water unit further includes a flame retardant storage unit 4. The flame retardant storage unit 4 is connected to the water tank 2 and can be controlled to open and close by a control unit. The flame retardant storage unit 4 stores flame retardants. When fire-fighting water is used for extinguishing a fire, before the fire-fighting water is activated, the flame retardant in the flame retardant storage unit 4 is controlled to be introduced into the water tank, and then the fire-fighting water is directed to the fire location to extinguish the fire, thus improving fire-fighting efficiency. Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the flame retardant storage unit 4 includes a housing, which can be set separately or integrated into the water tank 2. In this embodiment, the structure selected is integrated into the upper part of the water tank 2, and is provided with a flame retardant loading port 401 and a discharge port 402. The discharge port 402 is located at the lower part and is connected to the inside of the water tank in an openable and closable manner, so that the discharge can be achieved by gravity. The structure is relatively compact.

[0021] In this embodiment, the fire-fighting water unit further includes a rainwater collection unit 3, which is capable of collecting rainwater and: Transported to the water tank; such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the rainwater collection unit 3 is located above the water tank 2 and connected to the water tank at the bottom. It has a strip-shaped trough structure with a funnel-shaped cross-section, which is structurally advantageous for receiving rainwater. The illustration is only a schematic diagram and does not represent the ratio of the rainwater collection unit to the water tank. The upper opening of the rainwater collection unit can be made larger as needed, which will not be elaborated here. This structure can directly introduce rainwater into the water tank 2 for storage, which can save the use of fire-fighting water and is suitable for use in areas with a lot of rain. In actual use, the rainwater collection unit 3 can also be used as the water inlet of the water tank to introduce fire-fighting water when the rainwater storage is insufficient. Of course, the fire-fighting water can also have a separate water inlet, which will not be elaborated here.

[0022] Of course, the rainwater collection unit 3 can also be equipped with its own water storage tank, and can be opened and closed and connected to the fire sprinkler head 9. It can be switched with the water tank 2 as needed, and can also achieve the purpose of this utility model. In this embodiment, the rainwater collected by the rainwater collection unit 3 directly enters the water tank 2, which has a compact structure and uses fewer parts. At this time, the fire extinguishing agent storage unit 4 needs to be equipped with an outlet connected to the rainwater collection unit 3, which will not be described in detail here.

[0023] In this embodiment, the rainwater collection unit 3 filters the collected rainwater and then transports it to the water tank, such as... Figure 4As shown, the rainwater collection unit 3 has a filtration structure arranged from top to bottom, including an upper filter screen 301, a middle filter sand layer 302, and a lower sponge layer 303. It can effectively filter rainwater and dust and debris caused by long-term openness to ensure the cleanliness of the water tank. Water-permeable supports can be set between the upper filter screen 301, the middle filter sand layer 302, and the lower sponge layer 303 as needed. The method of installation in the rainwater collection unit 3 is not limited here. A common mechanical installation structure can be used, which will not be described in detail here.

[0024] In this embodiment, the fire sprinkler heads 9 are connected to the water tank 2 via fire water pipes 7 arranged on the roof of the vehicle compartment. All the fire sprinkler heads 9 can be installed via a circuitous fire water pipe 7, or via branched parallel fire water pipes 7 as shown in the figure, to ensure sufficient coverage on the roof. Figure 2 As shown, the fire water pipe 7 is connected to the water tank 2 via the main fire water valve 701 (a solenoid valve, which is easy to control), enabling the pipe to be opened and closed, facilitating centralized management and selective use by the control unit. Furthermore, each fire sprinkler head 9, or groups thereof, is connected to the fire water pipe 7, allowing the corresponding fire sprinkler head 9 to be activated based on the location of the fire, enabling targeted fire suppression, thereby improving fire suppression efficiency, saving fire suppression costs, and being more friendly to the goods and environment inside the vehicle, minimizing fire damage.

[0025] Of course, when the rainwater collection unit and the water tank are designed to be relatively independent, the fire sprinkler head 9 can be switched and opened / closedly connected to the water tank 2 and the rainwater collection unit 3 through the fire water pipe 7 arranged on the top of the carriage; it has the same technical effect, which will not be described in detail here; it is just that structurally the fire water pipe 7 needs to be connected to the water tank 2 and the rainwater collection unit 3 through branch pipes respectively, which will not be described in detail here; Similarly, the fire extinguisher nozzles 10 are closable and connected to the fire extinguisher 5 via fire extinguisher pipes 8 arranged on the ceiling of the vehicle compartment. All the fire extinguisher nozzles 10 can be installed via a circuitous fire extinguisher pipe 8, or via branching parallel fire extinguisher pipes 8 as shown in the figure, to ensure sufficient coverage on the roof. Their arrangement is basically parallel to the fire water pipes 7. Figure 2As shown, the fire extinguisher pipeline 8 is connected to the fire extinguisher 5 via the main fire extinguisher valve 801 (a solenoid valve for easy control), enabling openable and closable connection, facilitating centralized management and selective use by the control unit. Furthermore, each fire extinguisher nozzle 10, or a group of nozzles, is connected to the fire extinguisher pipeline 8 for openable and closable connection. When a fire extinguisher is selected, the corresponding fire extinguisher nozzle 10 can be activated based on the location of the fire, providing targeted fire suppression, thereby improving fire suppression efficiency, saving fire suppression costs, and being more friendly to the goods and environment inside the vehicle, minimizing fire damage. In this embodiment, the monitoring unit includes smoke sensors and / or heat source sensors distributed on the ceiling inside the carriage. This embodiment uses conventional smoke sensors and heat source sensors, which are distributed as needed. By setting up smoke sensors and heat source sensors and using them in combination, the location of the fire can be accurately determined, thereby enabling targeted fire suppression.

[0026] In this embodiment, the water tank 2 is positioned at the upper front of the outer top of the carriage 1, and the fire extinguisher 5 is arranged within the fire extinguisher receiving cavity 201 formed by the deformation of the water tank 2 in terms of its shape; as Figure 1 , Figure 2 and Figure 3 As shown, the water tank 2 is located at the front upper part of the outer top of the carriage 1, which is equivalent to the position of the roof deflector of the truck. The front side of the water tank forms the shape of the deflector (the streamline shape is a conventional shape of the deflector in the prior art, which will not be described in detail here), which can serve as a deflector and save the cost of the deflector. In addition, this position can also enable the fire water to flow and extinguish the fire by gravity, saving power costs.

[0027] In this embodiment, the fire sprinklers 9, individually or in groups, are connected to the water tank 2 (in this embodiment, through the fire water pipe 7) via corresponding fire sprinkler solenoid valves 901. The fire sprinklers 9 can be grouped as needed, with each group controlled by the same fire sprinkler solenoid valve 901. Alternatively, each fire sprinkler 9 can be controlled by a separate fire sprinkler solenoid valve 901. This embodiment uses a structure where each fire sprinkler 9 is associated with a separate fire sprinkler solenoid valve 901, which allows for more targeted fire suppression compared to grouping. Of course, when the rainwater collection unit is set up independently relative to the water tank 2, a number of fire sprinklers 9 are individually or in groups, switchable, and can be opened and closed by the corresponding fire sprinkler solenoid valves 901, connected to the water tank 2 and the rainwater collection unit 3; in terms of structure and form, the connection is only achieved through branch pipes, which will not be described in detail here. Each of the fire extinguisher nozzles 10, individually or in groups, is connected to the fire extinguisher 5 (in this embodiment, through the fire extinguisher pipe 8) via a corresponding fire extinguisher nozzle solenoid valve 1001. The fire extinguisher nozzles 10 can be grouped as needed, with each group controlled by the same fire extinguisher nozzle solenoid valve 1001. Alternatively, each fire extinguisher nozzle 10 can be controlled by a separate fire extinguisher nozzle solenoid valve 1001. In this embodiment, a single fire extinguisher nozzle 10 is assigned a separate fire extinguisher nozzle solenoid valve 1001, which allows for more targeted fire extinguishing compared to grouping.

[0028] In this embodiment, the flame retardant storage unit 4 is located above the water tank 2 and is connected to the water tank 2 via a flame retardant solenoid valve 403, which can be controlled to open and close by a control unit; for example Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the flame retardant storage unit 4 is integrated into the water tank 2 and divided by the interior of the water tank 2 (this can be achieved by common mechanical means). The upper part is provided with a flame retardant loading port 401, which needs to be equipped with a loading port cover, which will not be described in detail here. The lower part is provided with a discharge port 402, which is located in the upper middle part of the water tank and is connected to the water tank 2. It is equipped with a flame retardant solenoid valve 403. After the flame retardant solenoid valve 403, there is also a discharge one-way valve 404 to prevent fire water from entering the discharge port. The discharge one-way valve 404 is generally a diaphragm one-way valve, which can block water and facilitate the downward flow of flame retardant. In order to ensure the full flow of flame retardant, the bottom of the flame retardant storage unit 4 should be inclined towards the discharge port, which will not be described in detail here.

[0029] In this embodiment, a fire pump 6 is provided at the inlet end of the fire water pipeline 7. The fire pump 6 is used to draw water from the water tank 2 and transport it to the fire pipeline 7; the pump increases the water pressure, thereby improving the fire extinguishing efficiency. Of course, in the structure where the rainwater collection unit 3 is independent of the water tank 2, the fire pump is equipped with a first water inlet and a second water inlet that can be opened and closed. The first water inlet and the second water inlet are respectively connected to the water tank 2 and the rainwater collection unit 3, which can be opened and closed (generally through a solenoid valve).

[0030] like Figure 6 As shown, after loading is completed, the fire extinguishing method for the goods in case of fire is input into the control unit. Alternatively, commonly used goods can be pre-stored in the control unit. After the goods information is input, the control unit will select the corresponding fire extinguishing method (if no preset is used, the default is fire water extinguishing). Of course, you can also choose to use the two methods sequentially or simultaneously, which will not be elaborated here. When fire extinguishing is selected using fire water and a fire occurs inside compartment 1, the smoke detector and heat source detector at the corresponding location in the monitoring unit detect the fire information at that location and transmit it to the control unit. The control unit opens the main fire water valve 701 and starts the fire pump 6 and the corresponding fire water nozzle solenoid valve 901 to extinguish the fire with fire water; or, if fire water is prohibited for extinguishing the fire on the cargo, the main fire extinguisher valve 801 and the corresponding fire extinguisher nozzle solenoid valve 1001 are opened to extinguish the fire with fire extinguishers. Of course, if the fire water runs out or the extinguishing agent in the fire extinguisher is used up before the fire is extinguished, another fire extinguishing method can be activated to continue extinguishing the fire. Of course, a liquid level sensor needs to be installed in the water tank and a pressure sensor needs to be installed in the fire extinguisher to transmit the signal to the control unit. If the smoke sensor and heat source sensor can still detect the fire information when the liquid level in the water tank or the pressure in the fire extinguisher is zero, then another fire extinguishing method can be activated.

[0031] The overall fire extinguishing process simply involves monitoring the fire (location) and transmitting it to the control unit, which then issues an instruction to open the corresponding valve to complete the fire extinguishing. No complicated procedures are required; existing procedures can be used, so they will not be elaborated here.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An automated fire extinguishing system for enclosed train carriages, characterized in that: include: A fire-fighting water unit includes a water tank and a number of fire-fighting water nozzles distributed on the ceiling inside the vehicle, wherein the fire-fighting water nozzles are closable and connected to the water tank. The fire extinguisher unit includes a fire extinguisher and several fire extinguisher nozzles distributed on the ceiling inside the carriage, wherein the fire extinguisher nozzles are closable and connected to the fire extinguisher. The monitoring unit is used to monitor fire information inside the carriage; The control unit is used to receive fire information from the monitoring unit and to open or close the fire sprinkler head and / or fire extinguisher head according to the fire information. The fire water unit and fire extinguisher unit can be used sequentially, simultaneously, or selectively.

2. The automated fire extinguishing system for enclosed train carriages according to claim 1, characterized in that: The fire-fighting water unit also includes a flame retardant storage unit, which is connected to the water tank and can be controlled to open and close by a control unit.

3. The automated fire extinguishing system for enclosed train carriages according to claim 1, characterized in that: The fire-fighting water unit also includes a rainwater collection unit, which is capable of collecting rainwater and: Transported to the water tank; Alternatively, it can be connected to the fire sprinkler head in an openable / closeable manner.

4. The automated fire extinguishing system for enclosed carriages according to claim 3, characterized in that: The rainwater collection unit filters the collected rainwater and then delivers it to a water tank, or stores it itself.

5. The automated fire extinguishing system for enclosed train carriages according to claim 3, characterized in that: The fire sprinkler head is connected to the water tank via a fire water pipe arranged on the ceiling inside the carriage, and can be opened and closed. Alternatively, the fire sprinkler head is switchably and closably connected to the water tank and the rainwater collection unit via a fire water pipe arranged on the ceiling inside the carriage. The fire extinguisher nozzle is connected to the fire extinguisher via a fire extinguisher pipe located on the ceiling inside the carriage.

6. The automated fire extinguishing system for enclosed train carriages according to claim 1, characterized in that: The monitoring unit includes smoke sensors and / or heat source sensors distributed on the ceiling inside the carriage.

7. The automated fire extinguishing system for enclosed train carriages according to claim 1, characterized in that: The water tank is located at the front upper part of the exterior of the carriage, and the fire extinguisher is located inside the fire extinguisher receiving cavity formed by the deformation of the water tank in shape.

8. The automated fire extinguishing system for enclosed carriages according to claim 3, characterized in that: Each of the aforementioned fire sprinklers, individually or in groups, is connected to the water tank via a corresponding fire sprinkler solenoid valve that can be opened and closed. Alternatively, several of the fire sprinklers may be individually or in groups, switchable, and connected to the water tank and the rainwater collection unit via corresponding fire sprinkler solenoid valves. Each of the aforementioned fire extinguisher nozzles, individually or in groups, is connected to the fire extinguisher via a corresponding fire extinguisher nozzle solenoid valve that can be opened and closed.

9. The automated fire extinguishing system for enclosed train carriages according to claim 2, characterized in that: The flame retardant storage unit is located at the top of the water tank and is connected to the water tank by a control unit through a flame retardant solenoid valve.

10. The automated fire extinguishing system for enclosed train carriages according to claim 5, characterized in that: The fire water pipeline is equipped with a fire pump at its inlet end. The fire pump is used to draw water from the water tank and deliver it to the fire pipeline. Alternatively, the fire pump is equipped with a first inlet and a second inlet that can be opened and closed. The first inlet and the second inlet are respectively connected to the water tank and the rainwater collection unit that can be opened and closed.

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