Water feeding system with drainage function and motor home
By introducing a water distribution pipeline and a siphon-based water supply system into the RV's water system, combined with check valves and solenoid valves, the problems of water freezing and incomplete drainage in cold environments are solved, achieving automated and low-cost drainage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- RONGCHENG COMPASS NEW ENERGY VEHICLE CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-05-15
AI Technical Summary
Existing RV water systems are prone to freezing in cold environments and have incomplete drainage. Existing drainage systems are also complex and costly.
The system employs a water supply system with a first branch water supply pipeline and a second branch water supply pipeline. Combining the siphon principle and one-way valve design, it utilizes the negative pressure generated by the water tank drainage to automatically drain water. Automated control is achieved through one-way valves and solenoid valves, simplifying the operation process.
It enables complete drainage without external auxiliary equipment in cold environments, reducing application costs, simplifying operation procedures, ensuring that water lines do not freeze, and improving hot water supply efficiency.
Smart Images
Figure CN224244005U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of RV technology, and in particular to a water supply system with drainage function and an RV. Background Technology
[0002] Some vehicles, such as water trucks, high-pressure cleaning trucks, and RVs, are usually equipped with water tanks and water lines for work or living needs. For RVs, when the temperature is low in winter or when they are not used for a long time, it is necessary to drain all the water from the water pipes to prevent the pipes and equipment from freezing and damaging them.
[0003] like Figure 1 As shown, in a typical RV's water system, the water tank 120 stores cold water. After the water pump is turned on, part of the cold water after the pump goes directly into the mixing valve 150; the other part goes through the heater (becomes hot water) and then enters the mixing valve. Finally, the cold and hot water mix and adjust the temperature in the mixing valve.
[0004] For the above-mentioned water system, the existing technology has the following method for draining water: First, open the drain valve of the water tank to drain all the water in the water tank; then, open the water outlet device 160 and the water pump to drain a portion of the water in the pipeline.
[0005] This solution has the following shortcomings:
[0006] 1. Most of the water in the pipeline between the water pump and the mixing valve is not drained. In cold environments, there is a risk of the pipeline freezing if no action is taken.
[0007] Second, due to incomplete drainage, it is often necessary to fill the water system with antifreeze afterward, which is complicated and the antifreeze residue can also be harmful to the human body.
[0008] Patent CN212108955U discloses a drainage system for a gas water heater with antifreeze function, including a first solenoid valve located at the inlet of the inlet pipe; a second solenoid valve located at the outlet of the outlet pipe; and a drainage device connected to the inlet or outlet pipe. The drainage device can be an air pump or a water pump, which pumps water from the pipes and water heater into the pipes and forces it out with high-pressure air, or pumps it out with a water pump. The above drainage method requires a solenoid valve, an air pump, or a water pump, resulting in a complex control system and high application costs.
[0009] In conclusion, there is an urgent need to develop a new type of drainage system to solve the aforementioned technical problems. Summary of the Invention
[0010] This invention addresses the technical problem of difficulty in draining water from the water system of existing RVs by providing a water supply system and RV that facilitates the removal of accumulated water.
[0011] This utility model provides a water supply system with drainage function, which is provided with a water supply system having a first branch water supply pipe and a second branch water supply pipe. One end of the first branch water supply pipe and the second branch water supply pipe are connected to a mixing valve, and the other end are connected to a water tank through a T-junction A. A first water pump is provided between the T-junction A and the water tank. A heater is provided on the second branch water supply pipe. A drainage system is also provided. The drainage system has a first air inlet pipe, a second air inlet pipe, a first drain pipe and a second drain pipe. The first air inlet pipe is connected to the first drain pipe through a one-way valve, and the second air inlet pipe is connected to the second drain pipe through a one-way valve. The first drain pipe and the second drain pipe are connected to the water tank through a T-junction C and a main drain pipe.
[0012] The first drainage pipe is provided with a four-way A, and the other two ends of the four-way A are connected to the first branch water supply pipe; the second drainage pipe is provided with a four-way B, and the other two ends of the four-way B are connected to the second branch water supply pipe.
[0013] A first drain valve is provided between the tee C and the four-way A, and a second drain valve is provided between the tee C and the four-way B. The first and second drain valves are one-way valves. A third drain valve is provided on the main drain pipe, and a fourth drain valve is provided on the water tank. The heater is located between the tee A and the four-way B.
[0014] Preferably, the first intake pipe and the second intake pipe are connected to the main intake pipe via a T-junction B, and the main intake pipe is equipped with a one-way valve.
[0015] Preferably, a control system is also provided, wherein the third drain valve and the fourth drain valve are solenoid valves or electric valves, and the control system is signal-connected to the third drain valve and the fourth drain valve.
[0016] Preferably, the water tank is equipped with a water level sensor, which is signal-connected to the control system, and the control system is signal-connected to the first water pump.
[0017] Preferably, a second water pump is provided between the three-way A and the four-way B, and the control system is signal-connected to the second water pump.
[0018] This utility model also provides a motorhome, wherein the motorhome's water supply system adopts the above-mentioned water supply system with drainage function.
[0019] The beneficial effects of this utility model are:
[0020] (1) This utility model uses the negative pressure generated by the drainage of the water tank to draw water out of the pipeline by using the siphon principle, without the need for external auxiliary equipment such as drainage pumps or air pumps, and has low application cost.
[0021] (2) When draining water, this utility model only needs to open the drain valve of the water tank. The one-way valve is passively opened under the siphon effect, without the need for manual active control, thus simplifying the operation process.
[0022] (3) This utility model uses multiple sets of one-way valves to ensure that the water in the pipeline and water pump will not flow back;
[0023] (4) This utility model is also equipped with a water level sensor and a control system. By setting a solenoid valve or an electric valve, the system can achieve one-click automatic control of the drainage system.
[0024] (5) The present invention also provides a second water pump between the heater and the mixing valve to improve the efficiency of hot water supply;
[0025] (6) In practical application, the three-way A and four-way A are set close to the first water pump, and the four-way B and heater are set close to the three-way A. This arrangement enables the water in the first branch water pipe and the second branch water pipe to be drained more thoroughly. Attached Figure Description
[0026] Figure 1 This is a structural diagram of an existing RV water supply system;
[0027] Figure 2 This is a schematic diagram of the overall structure of this utility model;
[0028] Figure 3 This is the water supply system structure of Embodiment 1 of this utility model;
[0029] Figure 4 This is a structural diagram of the drainage system of this utility model;
[0030] Figure 5 This is a structural diagram of the water supply system in Embodiment 2 of this utility model.
[0031] Explanation of symbols in the attached drawings:
[0032] 100. Water supply system; 110. Water supply pipeline; 111. First main water supply pipeline; 112. First branch water supply pipeline; 113. Second branch water supply pipeline; 114. Second main water supply pipeline; 120. Water tank; 130. First water pump; 140. Heater; 150. Mixing valve; 160. Water outlet device; 170. T-junction A; 180. Second water pump; 200. Drainage system; 210. Air inlet pipeline; 211. Main air inlet pipeline; 212. First air inlet pipeline; 213. 220. Second intake pipe; 221. Drain pipe; 222. Main drain pipe; 223. First drain pipe; 224. Second drain pipe; 230. Intake valve; 231. First intake valve; 232. Second intake valve; 240. Drain valve; 241. First drain valve; 242. Second drain valve; 243. Third drain valve; 244. Fourth drain valve; 250. Tee B; 260. Tee C; 270. Four-way A; 280. Four-way B; 290. Main intake valve. Detailed Implementation
[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments, so that those skilled in the art to which the present invention pertains can easily implement the present invention.
[0034] Example 1: As Figure 2-4 As shown, this utility model includes a water supply system 100 and a drainage system 200.
[0035] The water supply system 100 includes a water supply pipeline 110, a water tank 120, a first water pump 130, a heater 140, a mixing valve 150, a water outlet device 160, and a tee A170; the water supply pipeline 110 includes a first main water supply pipeline 111, a first branch water supply pipeline 112, a second branch water supply pipeline 113, and a second main water supply pipeline 114.
[0036] One end of the first main water supply pipe 111 is connected to the water tank 120, and the other end is connected to one end of the first branch water supply pipe 112 and one end of the second branch water supply pipe 113 through a tee A170; the first water pump 130 is installed on the first main water supply pipe 111 and is located between the tee A170 and the water tank 120; the other end of the first branch water supply pipe 112 and the other end of the second branch water supply pipe 113 are respectively connected to the mixing valve 150; the heater 140 is installed on the second branch water supply pipe 113, specifically located between the tee A170 and the mixing valve 150, close to the tee A170; the mixing valve 150 is connected to the water outlet device 160 through the second main water supply pipe 114.
[0037] After the cold water in the water tank 120 passes through the first water pump 130, part of it enters the mixing valve 150 along the first main water supply pipe 111 and the first branch water supply pipe 112, and the other part enters the mixing valve 150 along the first main water supply pipe 111, the second branch water supply pipe 113 and the heater 140. The cold and hot water are mixed and regulated in the mixing valve 150, and the regulated water enters the water outlet device 160 through the second main water supply pipe 114.
[0038] The drainage system 200 includes an air intake pipe 210, a drainage pipe 220, an air intake valve 230, a drainage valve 240, a tee B250, a tee C260, a four-way valve A270, and a four-way valve B280; the air intake pipe 210 includes a main air intake pipe 211, a first air intake pipe 212, and a second air intake pipe 213; the drainage pipe 220 includes a main drainage pipe 221, a first drainage pipe 222, and a second drainage pipe 223; the air intake valve 230 includes a first air intake valve 231 and a second air intake valve 232; and the drainage valve 240 includes a first drainage valve 241, a second drainage valve 242, a third drainage valve 243, and a fourth drainage valve 244.
[0039] One end of the main intake pipe 211 is connected to one end of the first intake pipe 212 and one end of the second intake pipe 213 via a tee B250. The other end of the first intake pipe 212 is connected to one end of the first intake valve 231, and the other end of the second intake pipe 213 is connected to one end of the second intake valve 232. When the first intake valve 231 and the second intake valve 232 are open, the air entering the main intake pipe 211 can be diverted to the first intake pipe 212 and the second intake pipe 213.
[0040] The other end of the first air intake valve 231 is connected to one end of the first drain pipe 222 and the first branch water supply pipe 112 via a four-way connector A270. The other end of the second air intake valve 232 is connected to one end of the second drain pipe 223 and the second branch water supply pipe 113 via a four-way connector B280. The other ends of the first drain pipe 222 and the second drain pipe 223 are connected to one end of the main drain pipe 221 via a three-way connector C260. The other end of the main drain pipe 221 is connected to one end of the third drain valve 243. The other end of the third drain valve 243 is connected to the water tank 120. The water tank 120 is equipped with a fourth drain valve 244.
[0041] With the above configuration, air enters the first drain pipe 250 and the second drain pipe 260 through the main air intake pipe 211. Water from the first branch water supply pipe 112, the second branch water supply pipe 113, and the mixing valve 150 converges in the main drain pipe 221 through the first drain pipe 222 and the second drain pipe 223, and flows into the water tank 120 together. Finally, it is discharged through the fourth drain valve 244.
[0042] Heater 140 is located between tee A170 and four-way B280.
[0043] The first intake valve 231 and the second intake valve 232 are one-way valves, their function being to prevent water from flowing back into the first intake pipe 212 and the second intake pipe 213 from the various pipes and the water pump, thus preventing water from flowing back into the vehicle; for example Figure 2 As shown, without the first drain valve 241, the hot water pumped out by the heater 140 will flow back to the first branch water supply pipe 112 through the second drain pipe 223, tee C260, first drain pipe 222, and four-way pipe A270, causing hot water to mix with cold water. Therefore, it is necessary to install the first drain valve 241. The second drain valve 242 also prevents the water in the first branch water supply pipe 112 from mixing with the water in the second branch water supply pipe 113. Furthermore, the first drain valve 241 and the second drain valve 242 are also one-way valves. The one-way valve structures of the first air inlet valve 231, the second air inlet valve 232, the first drain valve 241, and the second drain valve 242 are the same, and all of them are the type that can be opened in one direction under a small negative pressure (such as gravity drainage).
[0044] like Figure 2 As shown, in actual application, the tee A170 and the four-way valve A270 are positioned closer to the first water pump 130, and the four-way valve B280 and the heater 140 are positioned closer to the tee A170. This arrangement allows the water in the first branch water inlet pipe 112 and the second branch water inlet pipe 113 to be drained more thoroughly.
[0045] A main intake valve 290 is provided at the main intake pipe 211, and the main intake valve 290 is a one-way valve. The main intake valve 290 plays a further safety role. When the first intake valve 231 and the second intake valve 232 both fail, the main intake valve 290 can prevent water in the pipeline and water pump from flowing back through the main intake pipe 211.
[0046] Example 2: Differences from Example 1, such as Figure 5 As shown, a second water pump 180 is also provided between the three-way A170 and the four-way B280. The heater 140 can be set at the front or rear of the second water pump 180. The positional relationship between the heater 140 and the second water pump 180 can be adjusted and interchanged according to actual needs. Compared with only the first water pump 130, the hot water supply efficiency is higher after adding the second water pump 180.
[0047] Example 3: Similarities to Example 1 or 2 will not be repeated. The difference is that this example also includes a control system (not shown in the figure), and the third drain valve 243 and the fourth drain valve 244 are solenoid valves or electric valves, preferably normally closed solenoid valves. The control system is signal-connected to the third drain valve 243 and the fourth drain valve 244, and is also signal-connected to the control panel (not shown in the figure). After clicking the one-button drainage command on the control panel, the control system controls the third drain valve 243 and the fourth drain valve 244 to open, thereby realizing the automated control of the drainage system.
[0048] A water level sensor (not shown in the figure) is installed in the water tank 120. The water level sensor is connected to the control system. When the water level sensor detects that the water level in the water tank 120 is low, it sends a feedback signal to the control system. The control system then controls the first water pump 130 and the second water pump 180 to start for a certain period of time and then shut them off to further discharge the remaining water in the pumps.
[0049] This utility model further discloses a motorhome that can adopt the water supply system described in the above embodiments.
[0050] Working principle: When the water supply system needs to be drained, the third drain valve 243 and the fourth drain valve 244 are opened manually or electrically, and the water in the water tank 120 begins to drain. During the drainage process, negative pressure is generated, which opens the main air inlet valve 290, the first air inlet valve 231, the second air inlet valve 232, the first drain valve 241, and the second drain valve 242 through the siphon effect, thereby draining the water from the mixing valve 150 and the water above the four-way A of the first branch water supply pipe 112 and the water above the four-way B of the second branch water supply pipe 113. When the water level sensor detects that the water level in the water tank 120 is low, it sends a feedback signal to the control system. The control system controls the first water pump 130 and the second water pump 180 to start for a certain period of time and then shut them off to further drain the remaining water in the pumps.
[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the scope of the claims of the present invention should be within the protection scope of the present invention.
Claims
1. A water supply system with drainage function, comprising a first branch water supply pipe and a second branch water supply pipe, wherein one end of the first branch water supply pipe and the second branch water supply pipe are connected to a mixing valve, and the other end are connected to a water tank via a tee A, wherein a first water pump is provided between the tee A and the water tank, and a heater is provided on the second branch water supply pipe, characterized in that... It is also equipped with a drainage system, which includes a first air inlet pipe, a second air inlet pipe, a first drain pipe, and a second drain pipe. The first air inlet pipe is connected to the first drain pipe through a one-way valve, and the second air inlet pipe is connected to the second drain pipe through a one-way valve. The first drain pipe and the second drain pipe are connected to the water tank through a T-junction C and a main drain pipe. The first drainage pipe is provided with a four-way A, and the other two ends of the four-way A are connected to the first branch water supply pipe; the second drainage pipe is provided with a four-way B, and the other two ends of the four-way B are connected to the second branch water supply pipe. A first drain valve is provided between the tee C and the four-way A, and a second drain valve is provided between the tee C and the four-way B. The first and second drain valves are one-way valves. A third drain valve is provided on the main drain pipe, and a fourth drain valve is provided on the water tank. The heater is located between the tee A and the four-way B.
2. The water supply system with drainage function according to claim 1, characterized in that, The first intake pipe and the second intake pipe are connected to the main intake pipe via a T-junction B, and the main intake pipe is equipped with a one-way valve.
3. The water supply system with drainage function according to claim 1, characterized in that, A control system is also provided, wherein the third drain valve and the fourth drain valve are solenoid valves or electric valves, and the control system is signal-connected to the third drain valve and the fourth drain valve.
4. The water supply system with drainage function according to claim 3, characterized in that, The water tank is equipped with a water level sensor, which is connected to the control system. The control system is connected to the first water pump.
5. The water supply system with drainage function according to claim 3 or 4, characterized in that, A second water pump is also provided between the three-way A and the four-way B, and the control system is signal-connected to the second water pump.
6. A motorhome, characterized in that, The water supply system of the RV adopts the water supply system with drainage function as described in any one of claims 1-5.