Device for automatically switching work of water pumps in parallel connection and series connection
By using a parallel and series structure of a self-priming water pump and a brushless motor water pump, combined with a one-way anti-backflow valve and a temperature control valve, the problems of high water pump noise and high temperature damage in smoke purifiers are solved, achieving low noise and long-term stable operation, and extending the equipment's lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU JINYU MOXIBUSTION THERAPY CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-05-05
AI Technical Summary
The water pumps in existing smoke purifiers are noisy and prone to damage during long-term operation, affecting the lifespan of the equipment and making them inconvenient for extended use.
The system adopts a parallel and series structure of a self-priming water pump and a brushless motor water pump, combined with a one-way anti-backflow valve and a temperature control valve to achieve automatic switching of working modes. The self-priming water pump can work for a short time under waterless conditions. After the self-priming pump circulates the water, the brushless motor water pump will work normally to prevent abnormal high temperature. The temperature control valve automatically controls the shutdown and startup of the equipment.
It achieves low-noise short-time water circulation and long-term low-noise operation, protecting the equipment from high-temperature damage and extending the equipment's service life.
Smart Images

Figure CN224200828U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of smoke purifier technology, specifically to a device for automatic switching between parallel and series operation of water pumps. Background Technology
[0002] Moxibustion is a traditional Chinese therapy that uses moxa wool as the main material to make moxa cones or sticks, which are then lit and used to fumigate or warm acupoints on the body surface. The procedure involves lighting moxa sticks made from the Chinese herb mugwort leaves and having the practitioner hold the sticks to fumigate specific acupoints on the body to achieve the purpose of treating and preventing diseases. However, the smoke produced when moxa sticks burn is large and has an irritating odor, polluting the indoor environment. Furthermore, the walls of the room will turn yellow from long-term exposure to the smoke. Therefore, a smoke purifier is needed to purify the smoke. This application provides a device for automatically switching between parallel and series operation of water pumps.
[0003] Existing purification devices only have a single water pump for pumping water into the purification system, which is noisy, inconvenient for long-term operation, and prone to damage after prolonged exposure to high temperatures, making them unsuitable for widespread use. Utility Model Content
[0004] The purpose of this utility model is to provide a device for automatic switching between parallel and series operation of water pumps, in order to solve the problems mentioned in the background art, such as high noise, inconvenience for long-term operation, easy damage to the equipment after long-term high temperature, and inconvenience for widespread use.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A device for automatic switching between parallel and series operation of water pumps includes an inlet component, an outlet component, and an anti-backflow component. The inlet component is fixedly installed on top of the anti-backflow component. The inlet component includes a self-priming water pump, a self-priming pump connecting pipe, a connecting pipe, and an inlet pipe. The outlet component includes a brushless motor water pump, a brushless water pump connecting pipe, and an outlet pipe. The two ends of the anti-backflow component are respectively connected to the inlet component and the outlet component. The anti-backflow component includes an inlet pipe, an outlet pipe, and a one-way anti-backflow valve.
[0007] A further improvement of this utility model is that: an installation water pipe is fixedly installed at the bottom end of the access pipe, and the one-way anti-backflow valve is fixedly installed between the two installation water pipes.
[0008] A further improvement of this utility model is that a temperature control valve is fixedly installed on the top of the one-way anti-backflow valve, and the outlet pipe is fixedly installed at one end of another water pipe.
[0009] A further improvement of the present invention is that a self-priming pump connecting pipe is fixedly installed at the bottom of the self-priming pump, and an inlet pipe is fixedly installed at the bottom end of one of the self-priming pump connecting pipes, the bottom of the inlet pipe being connected to the top end of the connecting pipe.
[0010] A further improvement of the present invention is that a connecting pipe is fixedly installed at the bottom end of the other self-priming pump connecting pipe, and the bottom of the connecting pipe is connected to the top end of the outlet pipe.
[0011] A further improvement of this utility model is that the water inlet assembly is connected to the water outlet assembly through a connecting pipe, and a fixed base is fixedly installed at the bottom of the self-priming water pump.
[0012] A further improvement of this utility model is that: the brushless water pump connecting pipe is fixedly installed at the bottom of the brushless motor water pump, the bottom end of one of the brushless water pump connecting pipes is connected to one end of the connecting pipe, and the other water outlet pipe is fixedly installed at the bottom end of the other brushless water pump connecting pipe.
[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:
[0014] This utility model provides a device for automatic switching between parallel and series operation of water pumps. Under the combined action of a self-priming water pump and a brushless motor water pump, the self-priming water pump can operate without water in the water pipe. However, due to its relatively high noise level, it is not suitable for long-term use and is only suitable for circulating water for a short period of time. The brushless motor water pump can only operate normally if there is no air in the water pipe. Since the self-priming water pump has already circulated the water and there is no air in the water pipe, the brushless motor water pump can operate normally. The brushless motor water pump is relatively quiet and is suitable for long-term use.
[0015] This utility model provides a device for automatic switching between parallel and series operation of water pumps. Under the action of a one-way anti-backflow valve and a temperature control valve, the one-way anti-backflow valve is located in the middle position between the self-priming water pump and the brushless motor water pump, so that the operation of the self-priming water pump and the brushless motor water pump is not affected. In order to prevent abnormal water circulation and high temperature caused by heat dissipation, the temperature control valve detects abnormal high temperature and the whole machine automatically stops. After the temperature returns to below the set temperature, the machine automatically starts. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the device for automatic switching between parallel and series operation of water pumps according to this utility model;
[0017] Figure 2 This is a schematic diagram of the water outlet component of this utility model;
[0018] Figure 3 This is a schematic diagram of the anti-backflow component of this utility model;
[0019] Figure 4 This is a schematic diagram of the water inlet assembly of this utility model.
[0020] In the diagram: 1. Water inlet assembly; 11. Fixed base; 12. Self-priming water pump; 13. Self-priming pump connecting pipe; 14. Water inlet pipe; 15. Connecting pipe; 2. Water outlet assembly; 21. Brushless motor water pump; 22. Brushless water pump connecting pipe; 23. Water outlet pipe; 3. Anti-backflow assembly; 31. Connecting pipe; 32. Installation water pipe; 33. One-way anti-backflow valve; 34. Temperature control valve; 35. Outlet pipe. Detailed Implementation
[0021] The present invention will be further described in detail below with reference to embodiments:
[0022] like Figure 1-4 As shown, this utility model provides a device for automatic switching between parallel and series operation of water pumps, including an inlet assembly 1, an outlet assembly 2, and an anti-backflow assembly 3. The inlet assembly 1 is fixedly installed on top of the anti-backflow assembly 3. The inlet assembly 1 includes a self-priming water pump 12, a self-priming pump connecting pipe 13, a connecting pipe 15, and an inlet pipe 14. The outlet assembly 2 includes a brushless motor water pump 21, a brushless water pump connecting pipe 22, and an outlet pipe 23. The two ends of the anti-backflow assembly 3 are respectively connected to the inlet assembly 1 and the outlet assembly 3. 2. The anti-backflow component 3 includes an inlet pipe 31, an outlet pipe 35, and a one-way anti-backflow valve 33. An installation water pipe 32 is fixedly installed at the bottom end of the inlet pipe 31. The one-way anti-backflow valve 33 is fixedly installed between two installation water pipes 32. A temperature control valve 34 is fixedly installed at the top of the one-way anti-backflow valve 33. After the temperature control valve 34 detects an abnormally high temperature, the whole machine automatically stops. After the temperature returns to below the set temperature, the machine automatically starts. The outlet pipe 35 is fixedly installed at one end of another installation water pipe 32.
[0023] A self-priming pump coupling pipe 13 is fixedly installed at the bottom of the self-priming pump 12. The brushless motor pump 21 can only work normally if there is no air in the connecting pipe 15. An inlet pipe 14 is fixedly installed at the bottom of one of the self-priming pump coupling pipes 13, and the bottom of the inlet pipe 14 is connected to the top of the connecting pipe 31. A connecting pipe 15 is fixedly installed at the bottom of the other self-priming pump coupling pipe 13, and the bottom of the connecting pipe 15 is connected to the top of the outlet pipe 35. The inlet assembly 1 is connected to the outlet assembly 2 through the connecting pipe 15. A fixed base 11 is fixedly installed at the bottom of the self-priming water pump 12. The brushless water pump connecting pipe 22 is fixedly installed at the bottom of the brushless motor water pump 21. Since the self-priming water pump 12 has circulated the water, there is no air in the water pipe. The brushless motor water pump 21 works normally. The brushless motor water pump 21 has low noise and is suitable for long-term use. The bottom end of one of the brushless water pump connecting pipes 22 is connected to one end of the connecting pipe 15. The other outlet pipe 23 is fixedly installed at the bottom end of the other brushless water pump connecting pipe 22.
[0024] The working principle of the device that automatically switches between parallel and series operation of the water pumps will be explained in detail below.
[0025] like Figure 1-4 As shown, the self-priming water pump 12 can operate without water in the connecting pipe 15. Due to its relatively high noise level, it is not suitable for prolonged use and is only suitable for circulating water for a short period of time. The brushless motor water pump 21 can only operate normally when there is no air in the connecting pipe 15. Since the self-priming water pump 12 has already circulated the water and there is no air in the water pipe, the brushless motor water pump 21 can operate normally. The brushless motor water pump 21 is relatively noisy and is suitable for prolonged use. The one-way anti-backflow valve 33 is located in the middle of the self-priming water pump 12 and the brushless motor water pump 21, and its operation is unaffected when controlling the operation of the self-priming water pump 12 and the brushless motor water pump 21. To prevent abnormal water circulation that could lead to high temperatures due to heat dissipation, the temperature control valve 34 automatically shuts down the entire machine after detecting abnormal high temperatures, and automatically restarts the machine after the temperature returns to below the set temperature.
[0026] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.
Claims
1. A device for automatic switching between parallel and series operation of water pumps, comprising an inlet assembly (1), an outlet assembly (2), and an anti-backflow assembly (3), characterized in that: The water inlet assembly (1) is fixedly installed on the top of the anti-backflow assembly (3). The water inlet assembly (1) includes a self-priming water pump (12), a self-priming pump connecting pipe (13), a connecting pipe (15), and a water inlet pipe (14). The water outlet assembly (2) includes a brushless motor water pump (21), a brushless water pump connecting pipe (22), and a water outlet pipe (23). The two ends of the anti-backflow assembly (3) are respectively connected to the water inlet assembly (1) and the water outlet assembly (2). The anti-backflow assembly (3) includes an inlet pipe (31), an outlet pipe (35), and a one-way anti-backflow valve (33).
2. The device for automatic switching between parallel and series operation of water pumps according to claim 1, characterized in that: The bottom end of the access pipe (31) is fixedly installed with an installation water pipe (32), and the one-way anti-backflow valve (33) is fixedly installed between the two installation water pipes (32).
3. The device for automatic switching between parallel and series operation of water pumps according to claim 2, characterized in that: A temperature control valve (34) is fixedly installed on the top of the one-way anti-backflow valve (33), and the outlet pipe (35) is fixedly installed at one end of another installation water pipe (32).
4. The device for automatic switching between parallel and series operation of water pumps according to claim 1, characterized in that: The bottom of the self-priming water pump (12) is fixedly installed with a self-priming pump connecting pipe (13), and an inlet pipe (14) is fixedly installed at the bottom end of one of the self-priming pump connecting pipes (13), and the bottom of the inlet pipe (14) is connected to the top end of the access pipe (31).
5. The device for automatic switching between parallel and series operation of water pumps according to claim 1, characterized in that: Another self-priming pump coupling pipe (13) is fixedly installed with a connecting pipe (15) at the bottom end, and the bottom of the connecting pipe (15) is connected to the top of the outlet pipe (35).
6. The device for automatic switching between parallel and series operation of water pumps according to claim 1, characterized in that: The water inlet assembly (1) is connected to the water outlet assembly (2) through a connecting pipe (15), and a fixed base (11) is fixedly installed at the bottom of the self-priming water pump (12).
7. The device for automatic switching between parallel and series operation of water pumps according to claim 1, characterized in that: The brushless water pump connector (22) is fixedly installed at the bottom of the brushless motor water pump (21). The bottom end of one of the brushless water pump connectors (22) is connected to one end of the connecting pipe (15), and the other water outlet pipe (23) is fixedly installed at the bottom end of the other brushless water pump connector (22).