Pneumatic constant-pressure water supply and pressurization water supply system
By using a pneumatic constant pressure water supply and booster water supply system, constant pressure water supply is achieved by using compressed air and pressure tanks, which solves the problems of unstable water supply in railway passenger cars and the difficulty of maintaining the clean water tank pump, improves system reliability and simplifies the maintenance process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- QINGDAO YIDEKE TECH CO LTD
- Filing Date
- 2026-02-12
- Publication Date
- 2026-05-12
AI Technical Summary
The water supply in the railway passenger car water supply and sanitation system is unstable, and the water pump in the clean water tank is difficult to repair, which affects the normal water use of the train and the use of the toilet. Moreover, the repair process is complicated and time-consuming.
The system adopts a pneumatic constant pressure water supply and booster water supply system. Compressed air is added to the clean water tank through the pneumatic control unit. Combined with the pressure sensor and the electronic control unit, constant pressure water supply is achieved, and the pressure tank is used for booster water supply, thus avoiding the use of water pumps and their auxiliary components.
It achieves stable water supply pressure, reduces failure rate, reduces maintenance difficulty and time, saves manufacturing and usage costs, and simplifies the antifreeze and drainage process.
Smart Images
Figure CN122013847A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of water supply and sanitation system control technology, and in particular to a pneumatic constant pressure water supply and booster water supply system. Background Technology
[0002] Common malfunctions in railway passenger car water supply and sanitation systems include pressure switch failure, solenoid valve leakage, and water pump supply failure, which seriously affect the normal water use of trains and the use of toilets.
[0003] The clean water tank supplies clean water to the vehicle's water-using equipment. The water pump is a key component for generating water pressure. A malfunctioning water pump leads to unstable water supply pressure, leaving the vehicle's water-using equipment without water. A malfunction in the water supply system directly affects the normal operation of the toilet system, and its severity often exceeds that of a malfunction in the toilet system itself.
[0004] Most of the clean water tanks are located under the train, making maintenance and replacement of parts very troublesome. They cannot be repaired during train operation and can only be inspected when the train is stopped. Moreover, the space for maintenance under the train is limited, and in most cases, the train skirts need to be removed. The maintenance and replacement of the water pumps require emptying the clean water tanks, which not only wastes water resources but is also very difficult to repair. A single maintenance operation takes about 2 to 3 hours and may even affect the train's punctuality.
[0005] The main causes of failure in the clean water tank include pump malfunction and level switch failure. The stability of the water supply pressure in the clean water tank reflects the main performance indicators of the water supply system; a constant pressure water supply system is an effective technical solution for solving train water supply problems. Summary of the Invention
[0006] To address the problems of unstable water supply and difficult maintenance of the clean water tank pump in existing rail vehicle water supply and sanitation systems, a pneumatic constant pressure water supply and booster water supply system is proposed. By monitoring the pressure in the clean water tank, abnormal water pressure can be detected, and a constant pressure water supply from the clean water tank can be ensured, reducing the failure rate.
[0007] To achieve the above objectives, this application provides a pneumatic constant pressure water supply and booster water supply system.
[0008] The pneumatic constant pressure water supply and booster water supply system includes a clean water tank, a pressure tank, a pressure sensor, a venting solenoid valve, a check valve, an automatic air vent valve, an electrical control unit, and a pneumatic control unit. The pneumatic control unit includes a gas source, a first pressure reducing valve, a pressure switch, a second pressure reducing valve, a first solenoid valve, and a second solenoid valve. The first pressure reducing valve is connected to the pressure tank through the first solenoid valve to provide air pressure to the pressure tank. The second pressure reducing valve is connected to the clean water tank through the second solenoid valve to provide air pressure to the clean water tank. The clean water tank includes a first air inlet, a first water outlet, a water inlet, a water inlet ball valve, a drain ball valve, and a venting solenoid valve. The first air inlet is connected to a pneumatic control unit. The first water outlet is connected to a washbasin to provide normal-pressure handwashing water to the washbasin faucet. The first water outlet is connected to a pressure tank via a one-way valve. The second air inlet is connected to the pneumatic control unit to provide pressurized flushing water to the toilet. A pressure sensor is installed on the clean water tank to detect pressure changes within the tank. The pressure tank is used for water storage and pressurization, and includes an inlet and outlet and a second air inlet. The second air inlet is connected to the air source via a second solenoid valve. One end of the inlet and outlet is connected to the first outlet of the clean water tank via a one-way valve, and the other end is connected to the toilet. The toilet includes a flushing switch and a flushing solenoid valve. The flushing switch starts the toilet to flush and discharge waste. The flushing solenoid valve is connected to the inlet and outlet of the pressure tank. When the toilet is flushed, the solenoid valve opens and the first solenoid valve opens to provide air pressure to the pressure tank. The electronic control unit is connected to the pressure sensor, the first solenoid valve, the second solenoid valve, the venting solenoid valve, the flushing solenoid valve, and the flushing switch. The pressure sensor is installed on the clean water tank to detect the pressure inside the tank. The first solenoid valve is connected to the air inlet of the pressure tank to provide compressed air. The second solenoid valve is connected to the air inlet of the clean water tank to provide air pressure. The venting solenoid valve is installed on the clean water tank to control the connection between the clean water tank and the atmosphere. The electronic control unit receives the pressure change signal inside the clean water tank and controls the second solenoid valve to open and close. The electronic control unit receives the flushing switch signal and controls the flushing solenoid valve to open and close. The flushing solenoid valve is installed on the toilet bowl to control the flushing of the toilet bowl. The one-way valve is installed in the pipeline connecting the clean water tank and the pressure tank to prevent the water supplied from the clean water tank to the pressure tank from flowing back. The automatic air vent valve is installed on the water supply pipe of the washbasin to release air from the water supply pipe and to allow the water supply pipe to be connected to the atmosphere when the water supply is stopped.
[0009] In some embodiments of this application, the electronic control unit is configured as follows: Obtain the upper limit threshold P1 of the pressure sensor detection, and the pressure value P2 after the clean water tank supplies water to the washbasin and pressure tank. When the pressure exceeds 5 kPa, the second solenoid valve is energized and opens to add compressed air into the clean water tank. The second solenoid valve closes when the pressure sensor detects that the pressure in the clean water tank has reached the upper pressure threshold P1.
[0010] In some embodiments of this application, a diaphragm is provided inside the pressure tank. When the toilet flushing switch is pressed, the flushing solenoid valve is energized and opens, and at the same time the first solenoid valve is energized and opens. Compressed air enters the pressure tank to generate pressurized water to flush the toilet. Then the first solenoid valve is de-energized and closes, and the flushing solenoid valve is de-energized and closes.
[0011] In some embodiments of this application, a one-way valve is provided between the pressure tank and the clean water tank. The one-way valve can be opened from the clean water tank toward the pressure tank. Low-pressure water in the clean water tank enters the pressure tank through the one-way valve, and pressurized water in the pressure tank cannot flow back to the clean water tank through the one-way valve. In normal standby mode, the pressure tank is full of water. When the water in the pressure tank has flushed the toilet, the one-way valve opens, and the clean water tank automatically replenishes the pressure tank.
[0012] In some embodiments of this application, an automatic air vent valve is provided in the water supply pipeline between the clean water tank and the washbasin. The automatic air vent valve is used to control the discharge of air from the water supply pipeline from the clean water tank to the washbasin.
[0013] In some embodiments of this application, a venting solenoid valve is provided on the clean water tank. In normal standby mode, the venting solenoid valve is in the closed state, and when the system performs antifreeze venting function or is in a power-off state, the venting solenoid valve is in the open state.
[0014] In some embodiments of this application, the electronic control unit includes an antifreeze drain switch; When the antifreeze venting switch is turned on, the control unit controls the second solenoid valve to close, the venting solenoid valve to open, the compressed air in the clean water tank is discharged, the automatic venting valve is connected to the atmosphere, the water in the clean water tank supply pipeline flows back to the clean water tank, the toilet is flushed twice, and the water in the pressure tank is discharged. When the antifreeze venting switch is turned off, the control unit controls the venting solenoid valve to open, the automatic venting valve is connected to the atmosphere, and the water in the water supply pipeline of the clear water tank flows back to the clear water tank.
[0015] In some embodiments of this application, the water tank further includes a water inlet and a drain outlet. The water inlet is connected to an external water source for injecting clean water into the water tank, and the drain outlet is equipped with a drain ball valve for draining water from the water tank.
[0016] Compared with existing technologies, the pneumatic constant pressure water supply and booster water supply system proposed in this application has the following advantages: 1. This application proposes a method for generating stable water supply pressure by introducing compressed air at a certain pressure into a sealed clean water tank, solving the problems of water pump failure and maintenance difficulties. It eliminates the need for a water pump and its auxiliary components, expands the space previously used for the water pump to the volume of the clean water tank, and saves on pump power consumption, thereby reducing the manufacturing and operating costs of the water supply system. This not only ensures constant pressure water supply but also improves the reliability of the water supply system.
[0017] 2. The constant pressure water supply method proposed in this application can install a pressure tank in the water supply pipeline, achieve secondary pressurization through compressed air, and control the air supply pressure by combining a pressure reducing valve, so as to easily set the pressure of constant pressure water supply.
[0018] 3. The constant pressure water supply system proposed in this application does not have a water pump in the water supply pipeline, making it easier to achieve freeze protection and drainage of the water supply pipeline.
[0019] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this application more apparent, specific embodiments of this application are given below. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other variations of the drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the pneumatic constant pressure water supply and booster water supply system provided in the embodiments of this application; In the above figures: 1. Electrical control unit; 2. Toilet bowl, 2.1 flush switch, 2.2 flush solenoid valve; 3. Washbasin, 3.1 Faucet; 4. Pneumatic control unit, 4.1 First pressure reducing valve, 4.2 First solenoid valve, 4.3 Second pressure reducing valve, 4.4 Second solenoid valve, 4.5 Pressure switch; 5. Clean water tank; 5.1 First air inlet; 5.2 Water outlet; 5.3 Water inlet; 5.4 Water inlet ball valve; 5.5 Drain ball valve; 5.6 Air solenoid valve. 6. Pressure tank, 6.1 Water inlet and outlet, 6.2 Second air inlet; 7. Check valve; 8. Pressure sensor; 9. Automatic air vent valve. Detailed Implementation
[0022] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0023] The prefixes such as "first" and "second" used in this application embodiment are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this application embodiment does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and should not constitute unnecessary restrictions due to the use of such prefixes. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.
[0024] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone.
[0025] In the embodiments provided in this application, it should be understood that the disclosed systems and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.
[0026] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments. This application proposes a pneumatic constant pressure water supply and booster water supply system, which can be applied to the water supply and sanitation system of rail vehicles, the water supply system of ships, and the water supply system of buildings.
[0027] The pneumatic constant pressure water supply and booster water supply system provided in this embodiment achieves constant pressure water supply by supplying compressed air to the clean water tank 5 through the pneumatic control unit 4. The clean water tank 5 is a sealed tank. Compressed air is added to the clean water tank 5 to generate pressurized water to supply water to devices such as the toilet 2 and the washbasin 3. A one-way valve 7 is installed in the water supply pipeline, and the pressurized water supply is achieved by supplying compressed air to the pressure tank 6 through the pneumatic control unit 4.
[0028] To achieve the above solution, the specific solution proposed in this application is as follows.
[0029] First, the structure of the pneumatic constant pressure water supply and booster water supply system involved in this application is described. The pneumatic control unit includes a gas source, a first pressure reducing valve 4.1, a pressure switch 4.5, a second pressure reducing valve 4.3, a first solenoid valve 4.2, and a second solenoid valve 4.4. The first pressure reducing valve 4.1 is connected to the pressure tank 6 through the first solenoid valve 4.2 to provide air pressure to the pressure tank 6. The second pressure reducing valve 4.3 is connected to the clean water tank 5 through the second solenoid valve 4.4 to provide air pressure to the clean water tank 5. The clean water tank 5 includes a first air inlet 5.1, a first water outlet 5.2, a water inlet 5.3, a water inlet ball valve 5.4, a drain ball valve 5.5, and a venting solenoid valve 5.6. The first air inlet 5.1 is connected to the pneumatic control unit 4; the first water outlet 5.2 is connected to the washbasin 3 to provide normal-pressure handwashing water to the faucet 3.1; the first water outlet 5.2 is connected to the pressure tank 6 through a one-way valve 7; the second air inlet 6.2 is connected to the pneumatic control unit 4; and the inlet and outlet 6.1 provide pressurized flushing water to the toilet 2. A pressure sensor 8 is installed on the clean water tank 5 to detect pressure changes within the clean water tank 5.
[0030] The pressure tank 6 is used for water storage and pressurization, including an inlet / outlet 6.1 and a second air inlet 6.2. The second air inlet 6.2 is connected to the air source via a second solenoid valve 4.2. One end of the inlet / outlet 6.1 is connected to the first outlet 5.2 of the clean water tank 5 via a one-way valve 7, and the other end is connected to the flushing solenoid 2.2 of the toilet 2. The toilet 2 includes a flush switch 2.1 and a flush solenoid valve 2.2. The flush switch 2.1 starts the toilet flushing and sewage discharge. The flush solenoid valve 2.2 is connected to the inlet and outlet 6.1 of the pressure tank 6. When the toilet is flushed, the solenoid valve 2.2 opens and the first solenoid valve 4.2 opens to provide air pressure to the pressure tank 6.
[0031] The electronic control unit 1 is connected to pressure sensor 8, first solenoid valve 4.2, second solenoid valve 4.4, venting solenoid valve 5.6, flushing solenoid valve 2.2, and flushing switch 2.1. Pressure sensor 8 is installed on clean water tank 8 to detect the pressure inside clean water tank 8. First solenoid valve 4.2 is connected to air inlet 6.2 of pressure tank 6 to provide compressed air to pressure tank 6. Second solenoid valve 4.4 is connected to air inlet 5.1 of clean water tank 5 to provide air pressure to clean water tank 5. Venting solenoid valve 5.6 is installed on clean water tank 5 to control the communication between clean water tank 5 and the atmosphere. The electronic control unit 1 receives the pressure change signal inside clean water tank 5 and controls the opening and closing of second solenoid valve 4.4. The electronic control unit 1 receives the signal from flushing switch 2.1 and controls the opening and closing of flushing solenoid valve 2.2. Flushing solenoid valve 2.2 is installed on toilet bowl and controls the flushing of toilet bowl.
[0032] A one-way valve 7 is installed in the pipeline connecting the clean water tank 5 and the pressure tank 6 to prevent the water supplied from the clean water tank 5 to the pressure tank 6 from flowing back; an automatic air vent valve 9 is installed on the water supply pipeline of the washbasin 3 to release the air in the water supply pipeline and to allow the water supply pipeline to be connected to the atmosphere when the water supply is stopped.
[0033] It should be noted that the water supply system does not supply water to the toilet bowl 2 directly through the clean water tank 5, but rather through the pressure tank 6. The clean water tank 5 is used for water storage. When the toilet bowl 2 needs water, it uses the pressurized water in the pressure tank 6. After the toilet bowl 2 is flushed, the clean water tank 5 is refilled with water into the pressure tank 6. The purpose of this method is to reduce the pressure requirements on the clean water tank 5. If the clean water tank 5 is strong enough, the air pressure entering the tank can be increased, or the toilet bowl 2 can be supplied with water directly through the clean water tank 5.
[0034] To achieve constant pressure water supply, it is necessary to monitor the pressure changes in the clean water tank 5. A pressure sensor 8 is installed at the top of the clean water tank 5 to detect the internal pressure. The electronic control unit 1 acquires the upper pressure threshold P1 (assuming 25 kPa) detected by the pressure sensor 8 and the lower pressure threshold P2 (assuming 20 kPa) after the clean water tank 5 supplies water to the washbasin 3 and pressure tank 6. When P1 - P2 > 5 kPa, the second solenoid valve 4.4 is energized and opens to add compressed air into the clean water tank 5. The second solenoid valve 4.4 closes when the pressure sensor 8 detects that the pressure inside the clean water tank 5 reaches P1.
[0035] The working process of the pneumatic constant pressure water supply and booster water supply system provided in this application will be described in detail below.
[0036] Water from the clean water tank 5 is supplied to the pressure tank 6 under air pressure. The pressure tank 6 is equipped with a diaphragm and is filled with water. When the flush switch 2.1 is pressed, the flush solenoid valve 2.2 is energized and opens, and at the same time, the first solenoid valve 4.2 is energized and opens. Compressed air enters the pressure tank 6 to generate pressurized water to flush the toilet 2. Then, the first solenoid valve 4.2 is de-energized and closes, and the flush solenoid valve 2.2 is de-energized and closes.
[0037] A one-way valve 7 is installed between the pressure tank 6 and the clean water tank 5. Low-pressure water in the clean water tank 5 enters the pressure tank 6 through the one-way valve 7. The pressurized water in the pressure tank 6 cannot flow back to the clean water tank 5 through the one-way valve 7. In normal standby mode, the pressure tank 6 is full of water. After the water in the pressure tank 6 has flushed the toilet 2, the clean water tank 5 automatically replenishes the pressure tank 6.
[0038] An automatic air vent valve 9 is installed in the water supply pipeline from the clean water tank 5 to the washbasin 3. The automatic air vent valve 9 can release air from the water supply pipeline from the clean water tank 5 to the washbasin 3. The clean water tank 5 is equipped with a venting solenoid valve 5.6. In the normal standby state, the venting solenoid valve 5.6 is in the closed state. When the system performs the antifreeze venting function or in the absence of power, the venting solenoid valve 5.6 is in the open state.
[0039] The pneumatic constant pressure water supply and booster water supply system has anti-freeze and air venting functions. When the anti-freeze and air venting switch of the operating control unit 1 is activated, the second solenoid valve 4.4 is closed first, the venting solenoid valve 5.6 is opened, the compressed air in the clean water tank 5 is discharged, the automatic air vent valve 9 is connected to the atmosphere, the water in the water supply pipeline of the clean water tank 5 flows back to the clean water tank 5, the toilet 2 is flushed twice, and the water in the pressure tank 6 is discharged. When the system loses power, the venting solenoid valve 5.6 is opened, the automatic air vent valve 9 is connected to the atmosphere, and the water in the water supply pipeline of the clean water tank 5 flows back to the clean water tank.
[0040] The pneumatic constant pressure water supply and booster water supply system provided in this application can be configured with multiple toilets 2 and multiple washbasins 3. Variations and alternative schemes of the same control principle in the art should be included within the protection scope of this invention.
[0041] The pneumatic constant pressure water supply and booster water supply system provided in this application is applicable not only to railway passenger cars, but also to water supply systems for ships or buildings. Any system that supplies water directly by adding compressed air to a closed container or by secondary boosting of water through a pressure tank is within the scope of the technical solution of this invention. Any simplifications or modifications and substitutions based on this system solution should be included within the protection scope of this invention.
[0042] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Those skilled in the art can easily conceive of variations or substitutions within the technical scope disclosed in this application, and all such variations or substitutions should be covered. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A pneumatic constant pressure water supply and booster water supply system, characterized in that, It includes a clean water tank, a pressure tank, an electrical control unit, and a pneumatic control unit, which are used to provide constant pressure water supply for the washbasin and pressurized water supply for the toilet. The pneumatic control unit includes a gas source, a first pressure reducing valve, a pressure switch, a second pressure reducing valve, a first solenoid valve, and a second solenoid valve. The first pressure reducing valve is connected to the pressure tank through the first solenoid valve to provide air pressure to the pressure tank. The second pressure reducing valve is connected to the clean water tank through the second solenoid valve to provide air pressure to the clean water tank. The clean water tank includes a first air inlet, a first water outlet, a water inlet, a water inlet ball valve, a drain ball valve, and a venting solenoid valve. The first air inlet is connected to a pneumatic control unit. The first water outlet is connected to a washbasin to provide normal-pressure handwashing water to the washbasin faucet. The first water outlet is connected to a pressure tank via a one-way valve to prevent backflow of water supplied from the clean water tank to the pressure tank. The second air inlet of the pressure tank is connected to the pneumatic control unit to provide pressurized flushing water to the toilet. A pressure sensor is installed on the clean water tank to detect pressure changes within the tank. The pressure tank is used for water storage and pressurization, and includes an inlet and outlet and a second air inlet. The second air inlet is connected to the air source via a second solenoid valve. One end of the inlet and outlet is connected to the first outlet of the clean water tank via a one-way valve, and the other end is connected to the toilet. The toilet includes a flushing switch and a flushing solenoid valve. The flushing switch starts the toilet to flush and discharge waste. The flushing solenoid valve is connected to the inlet and outlet of the pressure tank. When the flushing solenoid valve opens, the first solenoid valve opens to provide air pressure to the pressure tank. The electronic control unit is connected to the pressure sensor, the first solenoid valve, the second solenoid valve, the venting solenoid valve, the flushing solenoid valve, and the flushing switch. The venting solenoid valve is installed on the clean water tank to control the clean water tank to communicate with the atmosphere. The electronic control unit obtains the pressure change signal in the clean water tank and controls the second solenoid valve to open and close. The electronic control unit obtains the flushing switch signal and controls the flushing solenoid valve to open and close. The flushing solenoid valve is installed on the toilet bowl and controls the flushing of the toilet bowl. The automatic air vent valve is installed on the water supply pipe of the washbasin to release air from the water supply pipe and to allow the water supply pipe to be connected to the atmosphere when the water supply is stopped.
2. The pneumatic constant pressure water supply and booster water supply system according to claim 1, characterized in that: The electronic control unit is configured as follows: Obtain the upper limit threshold P1 of the pressure sensor detection, and the pressure value P2 after the clean water tank supplies water to the washbasin and pressure tank. When the pressure exceeds 5 kPa, the second solenoid valve is energized and opens to add compressed air into the clean water tank. The second solenoid valve closes when the pressure sensor detects that the pressure in the clean water tank has reached the upper pressure threshold P1.
3. The pneumatic constant pressure water supply and booster water supply system according to claim 1 or 2, characterized in that: The pressure tank is equipped with a diaphragm. When the toilet flushing switch is pressed, the flushing solenoid valve is energized and opens, and at the same time the first solenoid valve is energized and opens. Compressed air enters the pressure tank to generate pressurized water to flush the toilet.
4. The pneumatic constant pressure water supply and booster water supply system according to claim 1, characterized in that: The one-way valve can be opened from the clean water tank towards the pressure tank; in normal standby mode, the pressure tank is full of water. After the water in the pressure tank has flushed the toilet, the one-way valve opens, and the clean water tank automatically replenishes the pressure tank.
5. The pneumatic constant pressure water supply and booster water supply system according to claim 1, characterized in that: An automatic air vent valve is installed in the water supply pipeline between the clean water tank and the washbasin. The automatic air vent valve is used to control the discharge of air from the water supply pipeline from the clean water tank to the washbasin.
6. The pneumatic constant pressure water supply and booster water supply system according to claim 1, characterized in that: In normal standby mode, the venting solenoid valve is in the closed state. When the system performs antifreeze venting function or is in a power-off state, the venting solenoid valve is in the open state.
7. The pneumatic constant pressure water supply and booster water supply system according to claim 1, characterized in that: The electronic control unit includes an antifreeze venting switch; When the antifreeze venting switch is turned on, the control unit controls the second solenoid valve to close, the venting solenoid valve to open, the compressed air in the clean water tank is discharged, the automatic venting valve is connected to the atmosphere, the water in the clean water tank supply pipeline flows back to the clean water tank, the toilet is flushed twice, and the water in the pressure tank is discharged. When the antifreeze venting switch is turned off, the control unit controls the venting solenoid valve to open, the automatic venting valve is connected to the atmosphere, and the water in the water supply pipeline of the clear water tank flows back to the clear water tank.
8. The pneumatic constant pressure water supply and booster water supply system according to claim 1, characterized in that, The clean water tank also includes a drain outlet, and the water inlet can be connected to an external water source for injecting clean water into the clean water tank. The drain outlet is equipped with a drain ball valve for draining water from the clean water tank.