Underwater water and oxygen storage device and system thereof

Abstract

The underwater water and oxygen storage device comprises a high-pressure gas cylinder and a pair of end socket water tanks, the end socket water tanks are buckled at the two ends of the high-pressure gas cylinder, the underwater water and oxygen storage device is characterized in that the underwater water and oxygen storage device further comprises a mounting capacity expansion box, the mounting capacity expansion box is matched with a guide assembly and a connecting assembly, and the guide assembly is matched with the connecting assembly. The guiding assembly comprises a limiting block arranged on the end socket water tank and a positioning clamping groove formed in the mounting capacity expansion box, the positioning clamping groove is matched with the limiting block, and the connecting assembly comprises a water path connector communicated with the end socket water tank, a gas path connector communicated with the high-pressure gas cylinder and a communication quick connector communicated with the mounting capacity expansion box. When the positioning clamping groove and the limiting block are arranged in a matched mode, the communicating quick connector can be communicated with the water path connector or the air path connector.

Description

Technical Field

[0001] The present invention relates to the field of underwater equipment, and in particular to an underwater water and oxygen storage device and a system thereof. Background Art

[0002] The underwater oxygen and water storage system is installed in the compartment of the underwater device. Its function is to store water and oxygen in the fuel cell. During the process, its temperature and pressure are detected and signals are output. The product has high structural strength, light weight, high safety, reliability and service life, and good comprehensive environmental adaptability.

[0003] Traditional gas cylinders can only carry gas sources. When water sources are needed, the gas cylinders and water tanks need to be assembled together. However, during the assembly and use process, the positioning and installation process between the gas cylinders and the water tanks is relatively cumbersome, making the assembly process very inconvenient and needs to be improved.

[0004] The existing underwater water and oxygen storage device includes a high-pressure gas cylinder and a water storage tank, and on this basis also includes an additional water tank, see application number 202323353560.9, which relates to an oxygen and water storage device. An additional water tank is added to the invention. The additional water tank can only replenish liquid in the water tank, but cannot replenish oxygen in the high-pressure gas cylinder, which has limitations. Summary of the invention

[0005] The present invention aims at the disadvantage that the underwater water and oxygen storage devices in the prior art have only an additional water tank and can only supplement liquid or gas, and provides an underwater water and oxygen storage device and a system thereof.

[0006] In order to solve the above technical problems, the present invention is solved through the following technical solutions: an underwater water and oxygen storage device and its system, comprising a high-pressure gas cylinder and a pair of head water tanks, the head water tanks are buckled at both ends of the high-pressure gas cylinder, and it is characterized in that the underwater water and oxygen storage device also includes a mounting expansion box, the mounting expansion box is equipped with a guide assembly and a connecting assembly, the guide assembly includes a limit block arranged on the head water tank and a positioning slot arranged on the mounting expansion box, the positioning slot is arranged in cooperation with the limit block, the connecting assembly includes a water circuit connector connected to the head water tank, an air circuit connector connected to the high-pressure gas cylinder and a connecting quick connector connected to the mounting expansion box, when the positioning slot is arranged in cooperation with the limit block, the connecting quick connector can be connected with the water circuit connector or the air circuit connector.

[0007] The present invention is further configured as follows: the water circuit joint and the gas circuit joint are arranged on the limit block, the connecting quick joint is arranged in the positioning card slot, and the positioning card slot is provided with connecting holes respectively opposite to the water circuit joint and the gas circuit joint. When the mounting expansion box is used to store liquid, the connecting quick joint is connected to the connecting hole opposite to the water circuit joint; when the mounting expansion box is used to store gas, the connecting quick joint is connected to the connecting hole opposite to the gas circuit joint, and the connecting hole not connected to the connecting quick joint is connected to a plug.

[0008] The present invention is further configured as follows: the connecting quick connector is slidably provided with a sealing cap, and the sealing cap can form a sealing arrangement for the water circuit connector or the gas circuit connector.

[0009] The present invention is further configured as follows: the positioning slot is provided with a pushing mechanism for driving the sealing cap to move, the pushing mechanism includes a toggle plate and a push rod, the toggle plate is provided with a toggle slot for driving the sealing cap to move, when the limit block enters the positioning slot, the limit block abuts against the push rod and drives the push rod to move, the movement of the push rod drives the turntable to rotate, the rotation of the turntable drives the sealing cap to move through the toggle slot and the sealing cap forms a sealing arrangement with the water circuit joint or the gas circuit joint.

[0010] The present invention is further configured as follows: the toggle plate is provided with a lock column, the limit block is provided with a lock slot, and when the limit block completely enters the positioning slot, the lock column and the lock slot are matched.

[0011] The present invention is further configured such that: the push rod is provided with a spring for driving the push rod to return.

[0012] The present invention is further configured as follows: the limit block is provided with an avoidance hole, the avoidance hole is arranged opposite to the push rod, and the limit block is slidably provided with a stopper for covering or not covering the avoidance hole.

[0013] The present invention is further configured such that: the positioning slot is provided with a lever for driving the stopper to move.

[0014] The present invention is further configured as follows: a lifting handle for lifting is provided in the positioning slot, and the lifting handle can be provided in coordination with the positioning slot of other mounting expansion boxes.

[0015] The present invention is further configured as follows: the pulling handle is provided with an auxiliary quick connector which is communicated with other mounting expansion boxes.

[0016] The present invention has significant technical effects due to the adoption of the above technical scheme: by adding liquid or gas in the mounting expansion box, different connecting holes can be selected according to the liquid or gas connecting quick connectors, thereby playing the role of replenishing liquid or gas respectively, and the sealing cap can be driven to move by the cooperation of the toggle plate and the push rod, thereby forming a quick connection between the connecting quick connector and the gas circuit connector or the water circuit connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an underwater water and oxygen storage device and its overall system structure in Example 1;

[0018] Figure 2 It is a schematic diagram of an underwater water and oxygen storage device and its overall system structure in Example 2;

[0019] Figure 3 This is the coordination state between the head water tank and the mounting expansion box in the second embodiment;

[0020] Figure 4 It is a schematic diagram of the structure of the positioning slot part of the mounting expansion box in the second embodiment;

[0021] Figure 5 is a partial cross-sectional view of the guide assembly and the connecting assembly in the second embodiment;

[0022] Figure 6 is a schematic diagram of the structure of the lock slot in the second embodiment;

[0023] Figure 7 It is the mounting expansion box used to store high-pressure oxygen in the second embodiment.

[0024] The names of the parts indicated by the numerical labels in the above drawings are as follows: 1. High-pressure gas cylinder; 2. Head water tank; 3. Mounting expansion box; 4. Nozzle; 5. Gas pipeline; 6. Gas pipeline joint; 7. Water pipeline joint; 8. Connecting quick joint; 9. Plug; 10. Limit block; 11. Positioning slot; 12. Positioning frame; 13. Lifting handle; 14. Sealing cap; 15. Toggle plate; 16. Push rod; 17. Toggle slot; 18. Toggle block; 19. Sealing ring; 20. Avoidance groove; 21. Guide section; 22. Limit section; 23. Avoidance hole; 24. Toggle rod; 25. Auxiliary quick joint; 26. Lock column; 27. Lock slot; 28. Auxiliary high-pressure gas cylinder; 29 Series gas pipe. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] Embodiment 1:

[0027] An underwater water and oxygen storage device and system thereof, see Figure 1 , including a high-pressure gas cylinder 1, a pair of end water tanks 2 and a mounting expansion box 3, the high-pressure gas cylinder 1 is used to store a high-pressure gas source, the end water tank 2 is used to store liquid, a nozzle 4 is provided at one end of the high-pressure gas cylinder 1, the nozzle 4 is provided with an air inlet and outlet mechanism, the air inlet and outlet mechanism includes an air pipeline 5, and the air pipeline 5 is sequentially provided with an oxygen charging port, a high-pressure sensor, an oxygen outlet, a high-pressure solenoid valve, a pressure reducing integrated valve, a low-pressure sensor and a low-pressure solenoid valve.

[0028] A pair of end cap water tanks 2 are buckled at both ends of the high-pressure gas cylinder 1, the upper end of the end cap water tank 2 is provided with a water inlet, and the lower end is provided with a water outlet, the end cap water tank 2 is jointly provided with a water pipeline, and the two ends of the water pipeline are respectively connected to the water inlets of the two end cap water tanks 2, and the water pipeline is respectively provided with a ball valve, a filter and a one-way valve from the middle to the two ends, and the ball valve is provided with a water inlet, and the mounting expansion box 3 is arranged between the lower ends of the pair of end cap water tanks 2 and is used to support the high-pressure gas cylinder 1, and the lower end side wall of the end cap water tank 2 is provided with a limit block 10 for limiting the two end surfaces of the mounting expansion box 3, and the limit block 10 is used to realize rapid positioning between the end cap water tank 2 and the mounting expansion box 3, and the mounting expansion box 3 is used to store liquid, and the end cap water tank 2 and the mounting expansion box 3 are interconnected through a connecting water pipe, and the mounting expansion box 3 is snap-connected or fixedly connected with the limit block 10.

[0029] The nozzle 4 passes through the center of the head water tank 2, and the outer ring of the part of the nozzle 4 extending out of the head water tank 2 is provided with a thread, and a radial limit nut and an axial limit nut are threadedly connected to the thread. A center hole for the nozzle 4 to pass through is opened in the center of the head water tank 2, and the radial limit nut is polygonal. In this embodiment, the radial limit nut has a hexagonal structure, and the center hole of the head water tank 2 is the same shape as the radial limit nut, and the two are arranged with a clearance fit. The outer ring of the axial limit nut is larger than the center hole of the head water tank 2, and the axial limit nut abuts against the side of the head water tank 2 away from the high-pressure gas cylinder 1. The radial limit nut is used to limit the circumferential rotation of the head water tank 2 relative to the high-pressure gas cylinder 1, and the axial limit nut is used to limit the axial movement of the head water tank 2 relative to the high-pressure gas cylinder 1, thereby effectively avoiding displacement under the action of load during use, avoiding the separation of the head water tank 2 and the high-pressure gas cylinder 1, and improving the stability of the structure.

[0030] Embodiment 2:

[0031] The difference between this embodiment and the first embodiment is that, see Figure 2 In this embodiment, the mounting expansion box 3 and the limit block 10 are detachably connected, and a guide component and a connecting component are provided between the mounting expansion box 3 and the head water tank 2. Figure 3The connecting component includes an air circuit connector 6 connected to the oxygen inflation port, a water circuit connector 7 connected to the water circuit pipeline, and a connecting quick connector 8 connected to the mounting expansion box 3. The air circuit connector 6 and the water circuit connector 7 are both arranged on the limit block 10, and the air circuit connector 6 and the water circuit connector 7 are arranged at intervals and staggered. The guide component includes a positioning slot 11 opened at both ends of the mounting expansion box 3 and a limit block 10 matched with the positioning slot 11. The limit block 10 is convexly arranged on the head water tank 2. The positioning slots 11 at both ends of the mounting expansion box 3 are respectively matched with the limit blocks 10 of the head water tanks 2 at both ends. A positioning frame 12 for matching with the limit block 10 is arranged in the positioning slot 11. The positioning frame 12 is fixedly connected to the mounting expansion box 3 by bonding or screws. The positioning frame 12 is a rectangular parallelepiped structure with openings at both ends. The positioning frame 12 is clearance-matched with the limit block 10, and a lifting handle 13 is fixedly connected in the positioning frame 12. The fixed connection in this embodiment can be a screw threaded connection or a welding or bonding connection method. The lifting handle 13 partially extends out of the positioning slot 11. When several mounting expansion boxes 3 are in a stacked state, the lifting handle 13 extending out of the positioning slot 11 can be coordinated with the positioning frame 12 of the mounting expansion box 3 on the adjacent side. Therefore, when the mounting expansion boxes 3 are in a stacked state, the lifting handle 13 can play the same limiting role as the limit block 10, so that the mounting expansion boxes 3 that are not installed on the oxygen and water storage devices are neatly stacked. The positioning slots 11 on both sides of the mounting expansion boxes 3 are provided with lifting handles 13, so that it is convenient for the operator to take the mounting expansion boxes 3 with both hands through the two lifting handles 13.

[0032] See also Figure 2 and Figure 7 There are two types of mounting expansion boxes 3. The two types of mounting expansion boxes 3 have the same external structure and are both cavity structures. The interior can be used to store liquid or high-pressure oxygen. The mounting expansion box 3 for storing high-pressure oxygen is equipped with a plurality of auxiliary high-pressure gas cylinders 28. All auxiliary high-pressure gas cylinders 28 in the mounting expansion box 3 are connected through a series gas pipe 29. The mounting expansion box 3 is located in the positioning card slot 11 and has two connecting holes. When the mounting expansion box 3 cooperates with the limit block 10, the two connecting holes in the positioning card slot 11 are respectively connected to the gas circuit connector 6 and the water circuit connector 7. Relative to each other, the series air pipe 29 is connected to the connecting hole opposite to the air circuit connector 6. When the mounting expansion box 3 is used to store gas, the connecting quick connector 8 is threadedly connected to the connecting hole opposite to the air circuit connector 6, and the other connecting hole of the mounting expansion box 3 opposite to the water circuit connector 7 is threadedly connected to a plug 9, and the plug 9 is used to block the connecting hole. Conversely, when the mounting expansion box 3 is used to store liquid, the connecting quick connector 8 is threadedly connected to the connecting hole opposite to the water circuit connector 7, and the other connecting hole of the mounting expansion box 3 opposite to the air circuit connector 6 is threadedly connected to a plug 9.

[0033] See also Figure 5 and Figure 6The connecting quick connector 8 is provided with a sealing cap 14 that can only slide in the axial direction, and a pushing mechanism for driving the sealing cap 14 to move is provided in the positioning card slot 11. The pushing mechanism includes a toggle plate 15 and a push rod 16 for driving the toggle plate 15 to rotate. The positioning frame 12 is fixedly connected with a rotating shaft. The toggle plate 15 is annular, and its inner ring is rotatably matched with the rotating shaft, and its outer ring is gear-shaped. One side of the push rod 16 is a rack-shaped meshing with the outer ring of the toggle plate 15, and the end surface of the toggle plate 15 is provided with a toggle groove 1 7, the pull groove 17 is spirally arranged relative to the center of the dial plate 15, and a pull block 18 cooperating with the pull groove 17 is convexly arranged on the outer side surface of the sealing cap 14. The sealing cap 14 is a tubular structure, and its inner wall is provided with a stepped surface, and at least one sealing ring 19 is arranged on the stepped surface. When the push rod 16 moves, the dial plate 15 can be driven to rotate, and the spiral pull groove 17 cooperates with the pull block 18, so as to drive the sealing cap 14 on the connecting joint to move toward the corresponding gas circuit joint 6 or water circuit quick street direction until it abuts. The gas circuit joint 6 and the water circuit joint 7 are both provided with a sealing ring 19 that can abut against the inner wall of the sealing cap 14. When the sealing cap 14 moves into place, the connecting quick joint 8 is connected with the water circuit joint 7 or the gas circuit joint 6. The push rod 16 is slidably connected to the lifting handle 13 or the positioning frame 12. In this embodiment, the push rod 16 is slidably connected to the lifting handle 13, and a sliding groove for sliding the push rod 16 is provided on the lifting handle 13, and a return spring is arranged in the sliding groove. When the positioning frame 12 of the mounting expansion box 3 is sleeved on the limit block 10, one end of the push rod 16 abuts against the limit block 10, and the limit block 10 pushes the push rod 16 to move while entering the positioning frame 12. When the limit block 10 completely enters the positioning frame 12, the sealing cap 14 completes the sealing connection of the water circuit connector 7 or the air circuit connector 6. When the mounting expansion box 3 is driven to disengage from the positioning block, the push rod 16 is reset under the action of the spring, and synchronously drives the toggle plate 15 and the sealing cap 14 to reset.

[0034] See also Figures 4 to 6The limit block 10 is provided with an avoidance groove 20 for avoiding the toggle plate 15, and a lock column 26 is convexly provided on the end surface of the toggle plate 15. A lock groove 27 cooperating with the lock column 26 is provided on the end surface of the avoidance groove 20. The lock groove includes an arc-shaped guide section 21 and a linear limit section 22. When the limit block 10 completely enters the positioning frame 12, the lock column enters the limit section 22 from the guide section 21, which can limit the limit block 10 to move in the opposite direction of the positioning frame 12, thereby preventing the positioning frame 12 from being separated from the limit block 10. The lock column can only be driven to separate from the lock groove by rotating the toggle block. An avoidance hole 23 is provided on the limit block 10 relative to the push rod 16, and a retaining plate is slidably provided on the limit block 10. The retaining plate is used to cover the avoidance hole 23. When the positioning frame 1 2 is set on the limit block 10, the push rod 16 abuts against the abutment, and a lever is provided on the lifting handle 13. The lever is a 90-degree bent part, and the bending part of the lever is pivotally connected to the lifting handle 13. When the limit block 10 completely enters the positioning frame 12, the lifting handle 13 abuts against the limit block 10, and one end of the lever abuts against the abutment. Pressing the other end of the lever can drive the lever to push the abutment to move, so that the abutment exposes the avoidance hole 23. The push rod 16 enters the avoidance hole 23 under the action of its matching spring, and at the same time drives the toggle plate 15 to reset, thereby realizing the separation of the mounting expansion box 3 from the limit block 10. The limit block 10 is provided with a reset spring for resetting the abutment. When the mounting expansion box 3 is separated from the limit block 10, the abutment covers the avoidance hole 23 again.

[0035] See also Figure 4 The lifting handle 13 is in an inverted U shape, and the two sides of the U shape are fixedly connected to the inner side wall of the positioning frame 12, and the bottom surface of the U shape is a gripping section. The avoidance groove 20, the avoidance hole 23 and the stop block 10 are also arranged on the gripping section of the lifting handle 13. The connecting quick connector 8 is an electrically controlled three-way valve, and the two ends of the connecting quick connector 8 are respectively connected to the mounting expansion box 3 and the water connector 7 or the gas connector 6, and the remaining end of the connecting quick connector 8 is connected to the auxiliary quick connector 25 through a pipeline. The auxiliary quick connector 25 is arranged at the gripping section of the lifting handle 13. When the mounting expansion box 3 is in a stacked state, the lifting handle 13 of the mounting expansion box 3 enters the positioning frame 12 of the adjacent mounting expansion box 3 on one side, and also pushes the push rod 16 of the adjacent mounting expansion box 3 to move, and the toggle plate 15 is locked relative to the avoidance groove 20. At the same time, the mounting expansion boxes 3 are connected in sequence through the three-way auxiliary quick connector, so that the auxiliary quick connector in the stacked state can form a liquid or gas to be replenished at the same time.

[0036] An underwater water and oxygen storage system, characterized in that it includes a detection module, a replenishment module and a prompt module, the detection module includes a main water volume monitoring unit, a main air pressure detection unit and a mounting detection unit, the main water volume detection unit is used to monitor the remaining water volume in two head water tanks, the main air pressure detection unit is used to detect the remaining air pressure in the high-pressure gas cylinder, the mounting detection unit is used to detect the number of mounting expansion boxes currently mounted and the gas pressure or liquid capacity in the mounting expansion box, the replenishment module includes a water channel replenishment unit and a gas channel replenishment unit, the water channel replenishment unit is used to connect the mounting expansion box filled with liquid according to the remaining water volume detected by the main water volume detection unit, the gas replenishment unit is used to connect the mounting expansion box filled with high-pressure gas according to the remaining air pressure detected by the main air pressure detection unit, and the prompt module is used to generate an alarm message according to the remaining water volume of the main water volume detection unit, the remaining air pressure of the main air pressure detection unit and the gas pressure or liquid capacity mounted on the mounting expansion box when any value reaches a preset minimum value.

Claims

1. An underwater water and oxygen storage device, comprising a high-pressure gas cylinder (1) and a pair of end-sealed water tanks (2), wherein the end-sealed water tanks (2) are buckled at both ends of the high-pressure gas cylinder (1), characterized in that: The underwater water and oxygen storage device further comprises at least one mounting expansion box (3), wherein the mounting expansion box (3) is equipped with a guide assembly and a connection assembly, wherein the guide assembly comprises a limit block (10) arranged on the end cap water tank (2) and a positioning slot (11) arranged on the mounting expansion box (3), wherein the positioning slot (11) is arranged in cooperation with the limit block (10), and the connection assembly comprises a water channel connector (7) connected to the end cap water tank (2), an air channel connector (6) connected to the high-pressure gas cylinder (1), and a connection quick connector (8) connected to the mounting expansion box (3), wherein when the positioning slot (11) is arranged in cooperation with the limit block (10), the connection quick connector (8) can be arranged in communication with the water channel connector (7) or the air channel connector (6).

2. An underwater water and oxygen storage device according to claim 1, characterized in that: The water channel joint (7) and the gas channel joint (6) are arranged on the limit block (10), and the connecting quick joint (8) is arranged on the positioning slot (11). The positioning slot (11) is provided with connecting holes respectively opposite to the water channel joint (7) and the gas channel joint (6). When the mounting expansion box (3) is used to store liquid, the connecting quick joint (8) is connected to the connecting hole opposite to the water channel joint (7); when the mounting expansion box (3) is used to store gas, the connecting quick joint (8) is connected to the connecting hole opposite to the gas channel joint (6), and the connecting hole not connected to the connecting quick joint (8) is connected to the plug (9).

3. An underwater water and oxygen storage device according to claim 1, characterized in that: The connecting quick connector (8) is slidably provided with a sealing cap (14), and the sealing cap (14) can form a sealing arrangement for the water channel connector (7) or the gas channel connector (6).

4. An underwater water and oxygen storage device according to claim 3, characterized in that: The positioning slot (11) is provided with a pushing mechanism for driving the sealing cap (14) to move, the pushing mechanism comprising a toggle plate (15) and a push rod (16), the toggle plate (15) being provided with a toggle groove (17) for driving the sealing cap (14) to move, when the limit block (10) enters the positioning slot (11), the limit block (10) abuts against the push rod (16) and drives the push rod (16) to move, the movement of the push rod (16) drives the rotating disk to rotate, the rotation of the rotating disk drives the sealing cap (14) to move through the toggle groove (17), and the sealing cap (14) forms a sealing arrangement with the waterway joint (7) or the gasway joint (6).

5. An underwater water and oxygen storage device according to claim 4, characterized in that: The toggle plate (15) is provided with a locking column (26), and the limiting block (10) is provided with a locking groove (27). When the limiting block (10) completely enters the positioning slot (11), the locking column (26) and the locking groove (27) are arranged in cooperation.

6. An underwater water and oxygen storage device according to claim 5, characterized in that: The push rod (16) is provided with a spring for urging it to return to its original position.

7. An underwater water and oxygen storage device according to claim 6, characterized in that: The limit block (10) is provided with an avoidance hole (23), the avoidance hole (23) is arranged opposite to the push rod (16), the limit block (10) is slidably provided with a stopper for covering or not covering the avoidance hole (23), and the positioning slot (11) is provided with a lever (24) for driving the stopper to move.

8. An underwater water and oxygen storage device according to claim 7, characterized in that: A lifting handle (13) for lifting is arranged in the positioning slot (11), and the lifting handle (13) can be arranged in coordination with the positioning slot (11) of other mounting expansion boxes (3). The lifting handle (13) is provided with an auxiliary quick connector that communicates with other mounting expansion boxes (3).

9. An underwater water and oxygen storage device according to claim 1, characterized in that: A plurality of auxiliary high-pressure gas cylinders (28) are arranged in the mounting expansion box (3), and all the auxiliary high-pressure gas cylinders (28) in the mounting expansion box (3) are connected via a series gas pipe (29), and the series gas pipe (29) is connected to a connecting hole opposite to the gas circuit connector (6).

10. An underwater water and oxygen storage system, characterized in that: include: One or more underwater water and oxygen storage devices according to any one of claims 1 to 9, comprising a detection module, a replenishment module and a prompt module, The detection module includes a main water volume monitoring unit, a main air pressure detection unit and a mounting detection unit. The main water volume detection unit is used to monitor the remaining water volume in the two end water tanks, the main air pressure detection unit is used to detect the remaining air pressure in the high-pressure gas cylinder, and the mounting detection unit is used to detect the number of mounting expansion boxes currently mounted and the gas pressure or liquid capacity in the mounting expansion box; The replenishment module includes a water replenishment unit and a gas replenishment unit. The water replenishment unit is used to connect the mounting expansion box filled with liquid according to the remaining water volume detected by the main water volume detection unit, and the gas replenishment unit is used to connect the mounting expansion box filled with high-pressure gas according to the remaining air pressure detected by the main air pressure detection unit. The reminder module is used to generate an alarm message based on the remaining water volume of the main water volume detection unit, the remaining air pressure of the main air pressure detection unit and the gas pressure or liquid capacity mounted on the expansion box. When any value reaches a preset minimum value, the reminder module generates an alarm message.

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