A flow channel module for a cleaning device

Abstract

The utility model relates to a kind of flow channel modules for cleaning device, including flow channel seat body, flow channel seat body inside is equipped with pure liquid flow channel, dirty liquid flow channel and circulation flow channel, the outlet of pure liquid flow channel and the import of dirty liquid flow channel can be connected to be cleaned device, filter device is equipped between the outlet of dirty liquid flow channel and the import of circulation flow channel, circulation device is connected between the outlet of circulation flow channel and the import of pure liquid flow channel, it is characterized in that: still include pressure accumulation flow channel, the both ends of pressure accumulation flow channel are respectively arranged on dirty liquid flow channel to make dirty liquid flow channel form the flow control flow section parallel with pressure accumulation flow channel, pressure regulating valve is equipped on flow control flow section, inlet channel is equipped on pure liquid flow channel, inlet channel can be connected to gas source, pressure accumulation flow channel is equipped with pressure accumulation solenoid valve, the outlet of pure liquid flow channel, the import of dirty liquid flow channel, the import of circulation flow channel, the outlet of circulation flow channel and inlet channel are respectively formed external connection interface on the surface of flow channel seat body.

Description

Technical Field

[0001] This utility model relates to the field of pipeline cleaning technology, and in particular to a flow channel module for a cleaning device. Background Technology

[0002] With the rapid development of the automotive industry, heat pump air conditioning systems are increasingly being used in new energy vehicles due to their high efficiency and energy saving advantages. However, over time, components such as the evaporator and pipes in the air conditioning system accumulate dust, mold, bacteria, and other pollutants, which not only affect cooling and heating efficiency but also generate odors, endangering the health of drivers and passengers. Therefore, regular and thorough cleaning of automotive air conditioning systems, especially the complex heat pump air conditioning pipes, is particularly important.

[0003] Currently, most automotive air conditioning cleaning equipment on the market adopts a decentralized component structure, which means that independent components such as liquid pumps, reservoirs, valves, and pressure gauges are temporarily assembled on-site through multiple external hoses and quick connectors. This traditional model has several inherent drawbacks: significant loss of system kinetic energy and low cleaning efficiency. The lengthy external pipelines and numerous connectors result in complex fluid paths and high flow resistance, causing a large amount of the liquid pressure generated by the pump and the kinetic energy of the compressed air to be fully utilized in the aforementioned transportation process. This makes it difficult to effectively act on the interior of the air conditioning ducts to be cleaned, especially to remove firmly attached impurities, making it difficult to guarantee the cleaning effect. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a flow channel module for a cleaning device. The integrated module design can increase the internal pressure bearing capacity of the pipeline, reduce kinetic energy loss, and efficiently and thoroughly clean the heat pump air conditioning pipeline of new energy vehicles.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A flow channel module for a cleaning device includes a flow channel base. The flow channel base has a clean liquid flow channel, a dirty liquid flow channel, and a circulation flow channel inside. The outlet of the clean liquid flow channel and the inlet of the dirty liquid flow channel can be externally connected to the cleaning device. A filter device is provided between the outlet of the dirty liquid flow channel and the inlet of the circulation flow channel. A circulation device is connected between the outlet of the circulation flow channel and the inlet of the clean liquid flow channel. The device is characterized by further including a pressure-accumulating flow channel. Both ends of the pressure-accumulating flow channel are respectively disposed on the dirty liquid flow channel, forming a flow control section in parallel with the pressure-accumulating flow channel on the dirty liquid flow channel. A pressure regulating valve is provided on the flow control section. An air inlet is provided on the clean liquid flow channel, which can be externally connected to an air source. A pressure-accumulating solenoid valve is provided on the pressure-accumulating flow channel. The outlet of the clean liquid flow channel, the inlet of the dirty liquid flow channel, the inlet of the circulation flow channel, the outlet of the circulation flow channel, and the air inlet each form an external interface on the surface of the flow channel base.

[0007] By highly integrating the clean liquid flow channel, dirty liquid flow channel, circulation flow channel, and pressure accumulator flow channel into the flow channel seat, external pipeline connections are greatly reduced, lowering pressure loss and leakage risks. Furthermore, the pressure accumulator flow channel, connected in parallel with the dirty liquid flow channel control section, combined with a pressure accumulator solenoid valve and a pressure regulating valve, constitutes a unique pulse pneumatic purging system. Specifically, during the drying phase, the pressure regulating valve adjusts the system back pressure and pre-compresses and stores the airflow in the pressure accumulator flow channel. When the pressure accumulator solenoid valve opens, the stored high-pressure gas is instantly released, forming a pulse airflow with extremely high kinetic energy. This airflow effectively strips and discharges the liquid remaining in the automotive heat pump air conditioning pipes and internal flow channels, achieving drying efficiency and effect far exceeding conventional continuous airflow purging. This integrated modular design increases the internal pressure-bearing capacity of the pipes, reduces kinetic energy loss, and efficiently and thoroughly cleans the heat pump air conditioning pipes of new energy vehicles.

[0008] Preferably, a reversing valve is also included. The flow channel seat has a reversing component mounting port, and the reversing valve is installed in the reversing component mounting port. The reversing valve has an inlet, a first switching port, a second switching port, and an outlet. The wastewater flow channel includes a first circulation flow channel, and the clean water flow channel has a second circulation flow channel. The outlet of the clean water flow channel is connected to the inlet, and the inlet of the wastewater flow channel is connected to the outlet. The first circulation flow channel is connected to the first switching port, and the second circulation flow channel is connected to the second switching port. The reversing valve is a "two-position four-way" electromagnetic reversing valve, with one inlet for cleaning fluid entry, the first and second switching ports for circulating wastewater from the high and low pressure pipes of the heat pump air conditioner, and the outlet for wastewater discharge. The reversing valve integrates a movable valve core, which connects different flow channels by changing its position. Combined with the control module, it achieves an automatic backwashing function and, with the help of a filtration and circulation system, achieves the environmental protection goals of saving cleaning resources and centralized wastewater treatment.

[0009] Furthermore, it includes an external filter, which is detachably installed on the flow channel housing. The external filter is located in the wastewater flow channel and between the reversing valve and the pressure regulating valve. As a primary coarse filter, this external filter can intercept most particulate impurities, preventing blockage of the internal flow channel. It can also effectively reduce wear on the circulation device and extend its service life. At the same time, the external filter is detachable and replaceable, improving the dirt-holding capacity and reliability of the entire filtration system.

[0010] Preferably, a pressure measuring unit is also included, fixed on the flow channel seat. The pressure measuring unit includes a first sensor, a second sensor, and a third sensor. The first sensor is located on the side of the wastewater flow channel near the inlet of the reversing valve, the second sensor is located at the outlet, and the third sensor is located between the external filter and the pressure regulating valve. The three pressure sensors provide the system with real-time pressure monitoring capabilities, enabling intelligent diagnosis of the system's operating status and filter clogging. This allows the control module to promptly perform reverse flushing control and monitor the clogging of the external filter for timely replacement. This provides a crucial data foundation for predictive maintenance and fully automated intelligent control processes.

[0011] Preferably, the filtration device includes a storage tank and a built-in filter. The storage tank is fixed on the flow channel base, and the built-in filter is installed inside the storage tank, dividing the storage tank into a filtration zone and a filtration zone. The outlet of the wastewater flow channel is connected to the filtration zone, and the inlet of the circulation flow channel is connected to the filtration zone. Integrating the built-in filter into the storage tank creates a compact and fully functional cleaning platform. The built-in filter divides the storage tank into a filtration zone and a filtration zone, forming a dual filtration system together with the external filter. This achieves further filtration and circulation of the wastewater. Simultaneously, the pressurized airflow can wash away impurities adhering to the surface of the built-in filter. The impurities then flow out of the storage tank with the wastewater, achieving the non-disassembly property of the built-in filter and reducing equipment maintenance difficulty.

[0012] Preferably, the system also includes an exhaust duct and an automatic exhaust valve. The surface of the flow channel seat has an exhaust port, and the exhaust duct connects the exhaust port to the storage tank. The automatic exhaust valve is located on the exhaust port. The circulation device uses a high-pressure plunger pump. Because the high-pressure plunger pump generates a high-frequency pulsed liquid flow, if air is present in the cleaning circuit, the air in the pipeline will create a spring effect that counteracts the kinetic energy of the liquid flow. Therefore, this solution specifically includes an automatic exhaust valve on the storage tank. When the system is in the process of circulating cleaning fluid, the circulation pipeline can be filled with cleaning fluid, preventing air residue.

[0013] Furthermore, it also includes a flow meter. The flow channel housing has a flow component mounting port, in which the flow meter is fixed. The flow meter is installed on the sewage flow channel and located between the pressure regulating valve and the filter device. The addition of the flow meter, in conjunction with the pressure regulating valve, can accurately stabilize the system return liquid pressure to protect the water pump, while simultaneously monitoring the circulating flow rate in real time. This ensures the controllability and repeatability of the cleaning process, enabling precise operations to achieve optimal cleaning results for different pipeline types.

[0014] Preferably, a drain solenoid valve is also included. A drain port is located at the bottom of the storage tank, and the drain solenoid valve is installed on the drain port. The drain port is connected to a waste liquid collection tank. The waste liquid is discharged automatically or by program control with one button, completely avoiding the trouble and pollution of manual dumping. This greatly improves the ease of use of the equipment in a single cleaning cycle and maintains the cleanliness of the cleaning solution for subsequent recirculation cleaning.

[0015] Preferably, the system also includes a liquid inlet channel and a liquid inlet. The liquid inlet is located on the surface of the channel housing. One end of the liquid inlet channel connects to the waste liquid channel and is located between the pressure regulating valve and the flow meter. The other end of the liquid inlet channel connects to the liquid inlet. The liquid inlet connects to the cleaning fluid pump and the cleaning fluid. In a single cleaning cycle, frequent manual addition of cleaning fluid is not required. Furthermore, since the liquid inlet channel is positioned before the flow meter, the amount of cleaning fluid added to the closed-loop cleaning circulation pipeline can be clearly calculated, achieving an efficient cleaning fluid addition mode.

[0016] Preferably, a pressure relief channel and a safety valve are also included. One end of the pressure relief channel is connected to the clean liquid channel and located between the air inlet and the reversing valve, while the other end is connected to the exhaust channel. The safety valve is installed on the pressure relief channel. This provides a crucial overpressure protection mechanism for the entire high-pressure system. When the system pressure is abnormal, it can automatically release liquid or gas to the storage tank, effectively preventing equipment damage and serving as the final barrier to ensure the safety of equipment and operators.

[0017] In summary, this cleaning device uses a flow channel module, and the integrated module design can increase the internal pressure-bearing capacity of the pipeline, reduce kinetic energy loss, and efficiently and thoroughly clean the heat pump air conditioning pipeline of new energy vehicles. Attached Figure Description

[0018] The utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the assembly structure of the described embodiment;

[0020] Figure 2 This is a cross-sectional view of the clean liquid flow channel, the pressure relief flow channel, and the internal structure of the storage tank in the embodiment described above;

[0021] Figure 3 This is a first perspective structural schematic diagram of the embodiment described above;

[0022] Figure 4 This is a second perspective structural schematic diagram of the embodiment described above;

[0023] Figure 5 This is a schematic diagram of the reversing valve structure according to the described embodiment;

[0024] Figure 6 This is a schematic diagram of the installation position on the flow channel seat body in the embodiment described above;

[0025] The components include: control module-0, flow channel seat-1, clean liquid flow channel-11, air inlet-111, second circulation flow channel-112, dirty liquid flow channel-12, flow control section-121, first circulation flow channel-122, pressure regulating valve-123, circulation flow channel-13, pressure accumulator flow channel-14, pressure accumulator solenoid valve-141, reversing component mounting port-15, exhaust port-16, flow component mounting port-17, liquid filling flow channel-18, liquid filling port-181, pressure relief flow channel-19, filter device-2, liquid storage tank-21, and built-in filter-22. Drain port-23, Filtering area-24, Filtering area-25, Reversing valve-3, Inlet port-31, First switching port-32, Second switching port-33, Output port-34, External filter-4, Pressure measuring unit-5, First sensor-51, Second sensor-52, Third sensor-53, Exhaust duct-6, Automatic exhaust valve-61, Flow meter-7, Safety valve-8, Inlet solenoid valve-9, Inlet solenoid valve mounting port-91, Accumulator solenoid valve mounting port-92, Pressure regulating valve mounting port-93, External filter mounting port-94. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] A flow channel module for a cleaning device includes a flow channel base 1. The flow channel base 1 contains a clean liquid flow channel 11, a dirty liquid flow channel 12, and a circulation flow channel 13. The outlet of the clean liquid flow channel 11 and the inlet of the dirty liquid flow channel 12 are open to receive the cleaning device. A filter device 2 is provided between the outlet of the dirty liquid flow channel 12 and the inlet of the circulation flow channel 13. A circulation device is connected between the outlet of the circulation flow channel 13 and the inlet of the clean liquid flow channel 11. The device is characterized by further including a pressure-accumulating flow channel 14, with each end of the pressure-accumulating flow channel 14 having a... A flow control section 121 is formed on the waste liquid flow channel 12, which is connected in parallel with the pressure storage flow channel 14. A pressure regulating valve 123 is provided on the flow control section 121. An air inlet 111 is provided on the clean liquid flow channel 11. The air inlet 111 can be connected to an external air source. A pressure storage solenoid valve 141 is provided on the pressure storage flow channel 14. The outlet of the clean liquid flow channel 11, the inlet of the waste liquid flow channel 12, the inlet of the circulation flow channel 13, the outlet of the circulation flow channel 13, and the air inlet 111 are respectively formed on the surface of the flow channel seat 1.

[0028] By highly integrating the clean liquid flow channel 11, the dirty liquid flow channel 12, the circulation flow channel 13, and the pressure accumulator flow channel 14 into the flow channel base 1, the external pipeline connections are greatly reduced, lowering pressure loss and leakage risks. Furthermore, the pressure accumulator flow channel 14, connected in parallel with the flow control section of the dirty liquid flow channel 12, combined with the pressure accumulator solenoid valve 141 and the pressure regulating valve 123, constitutes a unique pulse pneumatic purging system. Specifically, during the drying stage, the pressure regulating valve 123 adjusts the system back pressure and pre-compresses and stores the airflow in the pressure accumulator flow channel 14. When the pressure accumulator solenoid valve 141 opens, the stored high-pressure gas is instantly released, forming a pulse airflow with extremely high kinetic energy. This airflow effectively strips and discharges the liquid remaining in the automotive heat pump air conditioning pipes and internal flow channels, thereby achieving drying efficiency and effect far exceeding that of conventional continuous airflow purging. (See attached reference.) Figure 6 The flow channel seat 1 is equipped with a pressure regulating valve mounting port 93, and the pressure regulating valve 123 has a built-in valve core for controlling liquid flow and can also be completely closed. An intake solenoid valve 9 is installed in the air intake duct 111. The flow channel seat 1 also has mounting ports 91 for the intake solenoid valve 9 and 92 for the accumulator solenoid valve 141. It can be seen that there is a side hole and a central hole. The side hole is used for compressed gas to enter. Both the intake solenoid valve 9 and the accumulator solenoid valve 141 are needle valves, with the needle used to open and close the central air passage. This mounting port design improves the module's pressure storage capacity. This integrated module design increases the internal pressure-bearing capacity of the pipeline, reduces kinetic energy loss, and efficiently and thoroughly cleans the heat pump air conditioning pipeline of new energy vehicles.

[0029] Preferably, a reversing valve 3 is also included, see attached document. Figure 6 The flow channel seat 1 is provided with a reversing component mounting port 15. The reversing valve 3 is installed in the reversing component mounting port 15. The reversing valve 3 is provided with an inlet 31, a first switching port 32, a second switching port 33, and an outlet 34. The sewage flow channel 12 includes a first circulation flow channel 13122, and the clean liquid flow channel 11 is provided with a second circulation flow channel 13112. The outlet end of the clean liquid flow channel 11 is connected to the inlet 31, the inlet of the sewage flow channel 12 is connected to the outlet 34, the first circulation flow channel 13122 is connected to the first switching port 32, and the second circulation flow channel 13112 is connected to the second switching port 33. The reversing valve 3 is a "two-position four-way" electromagnetic reversing valve 3, with an inlet 31 for the cleaning fluid to enter, the first switching port 32 and the second switching port 33 for circulating waste liquid from the high and low pressure pipes of the heat pump air conditioner, and the outlet 34 for sewage discharge. The reversing valve 3 integrates a movable valve core, which connects different flow channels by changing its position. Combined with the control module 0, it realizes the automatic backwashing function, and with the help of the filtration and circulation system, it achieves the environmental protection goals of saving cleaning resources and centralized treatment of waste liquid.

[0030] Furthermore, it also includes an external filter 4, which is detachably installed on the flow channel seat 1. The external filter 4 is located on the sewage flow channel 12 and between the reversing valve 3 and the pressure regulating valve 123. (See attached document) Figure 6 The external filter 4 adopts a rotating installation method with built-in threads. It can be seen that the installation port 94 of the external filter 4 has a side hole and a central hole. The side hole is used for the liquid to be filtered to enter, and the central hole is used for the liquid to flow out. As a primary coarse filter, the external filter 4 can intercept most particulate impurities, prevent clogging of the internal flow channel, and effectively reduce the wear of the circulation device and extend its service life. At the same time, the external filter 4 can be disassembled and replaced, which improves the dirt holding capacity and reliability of the entire filtration system.

[0031] Preferably, a pressure measuring unit 5 is also included. The pressure measuring unit 5 is fixed on the flow channel seat 1 and includes a first sensor 51, a second sensor 52, and a third sensor 53. The first sensor 51 is located on the side of the wastewater flow channel 12 near the inlet 31 of the reversing valve 3; the second sensor 52 is located on the outlet 34; and the third sensor 53 is located between the external filter 4 and the pressure regulating valve 123. The three pressure sensors provide the system with real-time pressure monitoring capabilities, enabling intelligent diagnosis of the system's operating status and filter clogging. This allows the control module 0 to promptly perform reverse flushing control and monitor the clogging of the external filter 4 for timely replacement. This provides a crucial data foundation for predictive maintenance and fully automated intelligent control processes.

[0032] As a preferred option, please refer to the appendix. Figure 2 The filtration device 2 includes a storage tank 21 and a built-in filter 22. The storage tank 21 is fixed on the flow channel base 1, and the built-in filter 22 is installed inside the storage tank 21, dividing the storage tank 21 into a filtration zone 2524 and a filtration zone 25. The outlet of the wastewater flow channel 12 is connected to the filtration zone 2524, and the inlet of the circulation flow channel 13 is connected to the filtration zone 25. Integrating the built-in filter 22 into the storage tank 21 creates a compact and fully functional cleaning platform. The built-in filter 22 divides the storage tank 21 into the filtration zone 2524 and the filtration zone 25, forming a dual filtration system together with the external filter 4. This achieves further filtration and circulation of the wastewater. At the same time, the pressurized airflow can flush the surface of the built-in filter 22, washing away impurities attached to the surface of the built-in filter 22. Then, the wastewater is discharged, and the impurities flow out of the storage tank 21 with the wastewater, realizing the non-disassembly property of the built-in filter 22 and reducing the difficulty of equipment maintenance.

[0033] Preferably, the system also includes an exhaust duct 6 and an automatic exhaust valve 61. An exhaust port 16 is provided on the surface of the flow channel seat 1, and the exhaust duct 6 connects the exhaust port 16 to the liquid storage tank 21. The automatic exhaust valve 61 is installed on the exhaust port 16. The circulation device uses a high-pressure plunger pump. Because the high-pressure plunger pump generates a high-frequency pulsed liquid flow, if air is present in the cleaning circuit, the air in the pipeline will create a spring effect to counteract the kinetic energy of the liquid flow. Therefore, this solution specifically installs an automatic exhaust valve 61 on the liquid storage tank 21 to ensure that the circulation pipeline is filled with cleaning liquid during the cleaning process, preventing air residue.

[0034] Furthermore, it also includes flow meter 7, see attached document. Figure 6 The flow channel seat 1 is equipped with a flow component mounting port 17, and the flow meter 7 is fixed in the flow component mounting port 17. The flow meter 7 is set on the sewage flow channel 12 and located between the pressure regulating valve 123 and the filter device 2. The addition of the flow meter 7, in conjunction with the pressure regulating valve 123, can accurately stabilize the system return liquid pressure to protect the water pump, while monitoring the circulation flow in real time, thereby ensuring the controllability and repeatability of the cleaning process, and enabling refined operations to achieve the best cleaning effect for different pipeline types.

[0035] Preferably, a drain solenoid valve (not shown in the figure) is also included. The bottom of the storage tank 21 is provided with a drain port 23, and the drain solenoid valve is installed on the drain port 23. The drain port 23 is connected to a waste liquid collection tank. The waste liquid is discharged automatically or by program control with one button, which completely avoids the trouble and pollution of manual dumping, greatly improves the ease of use of the equipment in a single cleaning program, and maintains the cleanliness of the cleaning solution for subsequent cleaning cycles.

[0036] Preferably, the system also includes a liquid inlet channel 18 and a liquid inlet 181. The liquid inlet 181 is disposed on the surface of the channel seat 1. One end of the liquid inlet channel 18 is connected to the waste liquid channel 12 and is located between the pressure regulating valve 123 and the flow meter 7. The other end of the liquid inlet channel 18 is connected to the liquid inlet 181. The liquid inlet 181 connects to the cleaning fluid pump and the cleaning fluid. In a single cleaning cycle, frequent manual addition of cleaning fluid is not required. Since the liquid inlet channel 18 is located before the flow meter 7, the amount of cleaning fluid added in the closed-loop cleaning circulation pipeline can be clearly calculated, achieving an efficient cleaning fluid addition mode.

[0037] Preferably, the system also includes a pressure relief channel 19 and a safety valve 8. One end of the pressure relief channel 19 is connected to the clean liquid channel 11 and is located between the air inlet 111 and the reversing valve 3. The other end of the pressure relief channel 19 is connected to the exhaust channel 6. The safety valve 8 is installed on the pressure relief channel 19. This provides a crucial overpressure protection mechanism for the entire high-pressure system. When the system pressure is abnormal, it can automatically release the liquid or gas to the storage tank 21, effectively preventing equipment damage and serving as the final barrier to ensure the safety of equipment and operators.

[0038] In summary, this cleaning device uses a flow channel module, and the integrated module design can increase the internal pressure-bearing capacity of the pipeline, reduce kinetic energy loss, and efficiently and thoroughly clean the heat pump air conditioning pipeline of new energy vehicles.

[0039] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flow channel module for a cleaning device, comprising a flow channel base, wherein the flow channel base has a clean liquid flow channel, a dirty liquid flow channel, and a circulation flow channel inside, wherein the outlet of the clean liquid flow channel and the inlet of the dirty liquid flow channel can externally receive a cleaning device, a filter device is provided between the outlet of the dirty liquid flow channel and the inlet of the circulation flow channel, and a circulation device is connected between the outlet of the circulation flow channel and the inlet of the clean liquid flow channel, characterized in that: It also includes a pressure-accumulating flow channel, with both ends of the pressure-accumulating flow channel respectively set on the sewage flow channel to form a flow control section in parallel with the pressure-accumulating flow channel on the sewage flow channel. The flow control section is equipped with a pressure regulating valve. The clean liquid flow channel is equipped with an air inlet channel, which can be connected to an external air source. The pressure-accumulating flow channel is equipped with a pressure-accumulating solenoid valve. The outlet of the clean liquid flow channel, the inlet of the sewage flow channel, the inlet of the circulation flow channel, the outlet of the circulation flow channel, and the air inlet channel are respectively formed with external interfaces on the surface of the flow channel seat.

2. The flow channel module for the cleaning device according to claim 1, characterized in that: It also includes a reversing valve. The flow channel seat is provided with a reversing component mounting port. The reversing valve is installed in the reversing component mounting port. The reversing valve is provided with an input port, a first switching port, a second switching port, and an output port. The sewage flow channel includes a first circulation flow channel. The clean liquid flow channel is provided with a second circulation flow channel. The outlet end of the clean liquid flow channel is connected to the input port. The inlet of the sewage flow channel is connected to the output port. The first circulation flow channel is connected to the first switching port. The second circulation flow channel is connected to the second switching port.

3. The flow channel module for the cleaning device according to claim 2, characterized in that: It also includes an external filter, which is detachably installed on the flow channel seat and is located on the sewage flow channel between the reversing valve and the pressure regulating valve.

4. The flow channel module for the cleaning device according to claim 3, characterized in that: It also includes a pressure measuring unit, which is fixed on the flow channel seat. The pressure measuring unit includes a first sensor, a second sensor and a third sensor. The first sensor is located on the side of the sewage flow channel near the inlet of the reversing valve, the second sensor is located on the outlet, and the third sensor is located between the external filter and the pressure regulating valve.

5. The flow channel module for the cleaning apparatus according to any one of claims 1-4, characterized in that: The filtration device includes a storage tank and a built-in filter. The storage tank is fixedly installed on the flow channel base. The built-in filter is installed inside the storage tank and divides the storage tank into a filtration zone and a filtration zone. The outlet of the wastewater flow channel is connected to the filtration zone, and the inlet of the circulation flow channel is connected to the filtration zone.

6. The flow channel module for the cleaning device according to claim 5, characterized in that: It also includes an exhaust duct and an automatic exhaust valve. The surface of the flow channel seat is provided with an exhaust port. The exhaust duct connects the exhaust port to the area to be filtered. The automatic exhaust valve is installed on the exhaust port.

7. The flow channel module for the cleaning device according to claim 6, characterized in that: It also includes a flow meter, and the flow channel seat is provided with a flow component installation port. The flow meter is fixed in the flow component installation port and is set on the sewage flow channel and located between the pressure regulating valve and the filter device.

8. The flow channel module for the cleaning device according to claim 7, characterized in that: It also includes a drain solenoid valve, and the bottom of the storage tank is provided with a drain port, and the drain solenoid valve is installed on the drain port.

9. The flow channel module for the cleaning device according to claim 8, characterized in that: It also includes a liquid filling channel and a liquid filling port. The liquid filling port is located on the surface of the channel seat. One end of the liquid filling channel is connected to the sewage channel and is located between the pressure regulating valve and the flow meter. The other end of the liquid filling channel is connected to the liquid filling port.

10. The flow channel module for the cleaning device according to claim 9, characterized in that: It also includes a pressure relief channel and a safety valve. One end of the pressure relief channel is connected to the clean liquid channel and is located between the air intake channel and the reversing valve. The other end of the pressure relief channel is connected to the exhaust channel. The safety valve is installed on the pressure relief channel.

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