Pre-filter with built-in check valve and flow monitoring function

Abstract

The utility model relates to a pre-filter with a built-in check valve and a flow monitoring function, which comprises a valve head with a water inlet channel, a water outlet channel and a filter bottle matched port, a filter bottle, a filter mechanism and a pollution discharge component, and is further provided with a controller, a check valve assembly cavity is arranged in the valve head, a check valve is arranged in the check valve assembly cavity, and the filter mechanism is arranged in the valve head. The check valve comprises a valve shell, a valve body and a non-return adjusting structure, a check valve assembly cavity is formed in a water channel flowing from the center of the filter screen framework to the water outlet channel of the valve head, a non-return flow channel is formed in the valve shell, the valve body comprises a driving part and a non-return part, the non-return part is matched with the non-return flow channel, and the non-return adjusting structure is fixed to the driving part. And the non-return adjusting mechanism can drive the driving part to drive the non-return part to close or open the non-return flow channel under the action of water pressure in the prefilter. The check valve is simple in structure and easy to install, reliable check control is achieved, and installation of other intelligent control components of the valve head is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to a front filter with built-in check valve and flow monitoring function, belonging to water purification equipment technical field. BACKGROUND

[0002] The mainstream product of the prior art front filter is in the form of filter bottle under placement, comprising: valve head, filter bottle connected with the upper end of the valve head, drain ball valve connected with the lower end of the filter bottle, filter screen framework arranged in the filter bottle, and filter screen framework outer wall sleeved with filter screen. In the process of use, water flows into the gap between the filter bottle and the filter screen from the water inlet of the valve head, flows into the center of the filter screen framework after being filtered by the filter screen, and then flows to the water outlet of the valve head from the center of the filter screen framework. When pollution needs to be discharged, the drain ball valve at the lower end of the filter bottle is opened to achieve this. This structure has the possibility of air entering due to water backflow in the water outlet pipeline when discharging, so a check valve structure is needed.

[0003] The check valve is a kind of valve, also known as non-return valve or reverse valve, which mainly prevents fluid from flowing backward in the pipeline. When the flow direction of fluid in the pipeline changes, the check valve will automatically close to prevent fluid from flowing backward, thereby protecting the safety of the pipeline and equipment. The check valve of the prior art is usually composed of a valve body, a valve cover, a valve seat and a sealing seat, and is installed in the water inlet pipeline and the water outlet pipeline. However, the space of the water inlet port and the water outlet port of the valve head of the front filter is limited, and in the front filter with automatic intelligent control, the valve head integrates a controller, a driving motor and a flow detection mechanism, etc. Therefore, the installation of the conventional check valve is limited, and there is extra space in the water path from the center of the filter screen framework to the water outlet of the valve head, which can install the check valve structure.

[0004] In addition, the filter screen of the filter mechanism will be clogged after a long time of use, so it needs to be cleaned regularly. In the prior art, the cleaning time is not intelligent enough, usually it is preset, or manually opened according to the situation, which cannot accurately judge the clogging state of the filter screen of the filter mechanism, affecting the use effect of the front filter. In addition, when the pipeline of the front filter leaks, it also needs to feedback the abnormal water state in time. The utility model aims to provide a front filter with more optimized structure, including a valve head structure with built-in check valve, the check valve is arranged in the water path from the center of the filter screen framework to the water outlet of the valve head, which can realize reliable control of the check valve when the front filter discharges, avoid air entering due to water backflow in the water outlet pipeline, and does not affect the installation of other intelligent control components of the valve head. Through the reasonable setting of the pressure sensor, the cleaning time of the filter screen is accurately evaluated through the value change of the front filter pressure sensor. In addition, the flow monitoring mechanism is arranged, which can feedback to the user in time when leaking. SUMMARY

[0005] The purpose of this invention is to address the shortcomings of existing pre-filters and to provide a more optimized pre-filter structure. This includes a valve head structure with a built-in check valve. The check valve is located in the water path from the center of the filter screen skeleton to the outlet of the valve head. When the pre-filter is being discharged, reliable backflow prevention is achieved, avoiding water backflow in the outlet pipe that could cause air to enter, without affecting the installation of other intelligent control components on the valve head. A preferred solution uses a pressure sensor to accurately assess the timing of filter screen cleaning based on changes in the pressure sensor readings. An even better solution incorporates a flow monitoring mechanism that promptly alerts the user in case of leakage.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A pre-filter with a built-in check valve and flow monitoring function includes a valve head with an inlet channel, an outlet channel, and a filter bottle assembly port. A filter bottle is assembled at the filter bottle assembly port, and a filtration mechanism is provided inside the filter bottle. The filtration mechanism includes a filter frame and a filter unit, and also includes a controller. The valve head has a check valve assembly chamber, and a check valve is installed within the assembly chamber. The check valve includes a valve housing, a valve body, and a check valve adjustment structure. The check valve assembly chamber is located in the water channel from the center of the filter frame to the outlet channel of the valve head. The valve housing has a check flow channel. The valve body includes a drive unit and a check unit, which are adapted to the check flow channel. The check valve adjustment structure is located in the drive unit. Under the water pressure inside the pre-filter, the check valve adjustment structure can drive the drive unit to drive the check unit to close or open the check flow channel.

[0008] This utility model has a simple structure and is easy to install. It is set in the water path from the center of the filter screen frame to the outlet of the valve head. When the pre-filter is discharged, it can achieve reliable backflow prevention and control, prevent water backflow in the outlet pipe from causing air to enter, and has little impact on the structure of the existing valve head and does not affect the installation of other intelligent control components of the valve head.

[0009] Preferably, it also includes a valve seat, the valve body is placed inside the valve seat, and a valve sleeve is provided between the valve seat and the valve body. The check valve part opens or closes the check valve passage by cooperating with the valve sleeve.

[0010] Preferably, a flow sensor is fixedly installed in the water outlet channel and electrically connected to the controller to obtain water flow information of the water outlet channel.

[0011] Preferably, the flow sensor is a Hall effect flow sensor, including a magnetic induction impeller structure located in the water outlet channel and a matching Hall effect sensor, wherein the Hall effect sensor is electrically connected to the controller.

[0012] The working principle is as follows: when there is water flow in the rear section of the water outlet channel, the check valve is displaced (the elastic return element is compressed), the check valve is opened, the displacement sensor is turned on under the action of magnetic force, and the controller starts timing. When the preset time is exceeded, the controller determines that the water use is abnormal, and sends information to the user. This situation is mainly for the case that the impeller of the magnetic induction impeller mechanism in the water outlet channel does not rotate due to low water flow. When the water flow can drive the impeller to rotate, the positive and negative poles of the magnetic steel on the impeller act on the Hall sensor, and the water flow is calculated by the rotation speed of the impeller. When the single water use exceeds the preset value, the controller determines that the water use is abnormal, and sends information to the user.

[0013] Preferably, the water inlet channel and the water outlet channel are each provided with a pressure sensor, and the pressure sensor is electrically connected with the controller of the pre-filter.

[0014] Working principle: when the product is used normally, the filter unit is gradually clogged, the clogging becomes more and more serious, and the pressure difference between the water inlet channel and the water outlet channel becomes larger and larger. When the pressure difference reaches a preset pressure difference value, the controller controls the blowdown assembly to open, automatically flushes and blows down, and after the flushing and blowdown are completed, the controller controls the blowdown assembly to close again.

[0015] Preferably, the controller can be connected with a remote server or a user terminal through a wireless communication mode, and the controller is provided with a remote communication unit, and the remote communication unit includes a wireless communication module electrically connected with the circuit board of the controller.

[0016] Preferably, the controller has a processor function, the wireless communication module is any one or a combination of two of a 2G module, a 3G module, a 4G module, a 5G module and a WiFi module, and the remote server and the user terminal can receive information or remotely control the controller through the wireless communication module; at least one MCU is integrated on the circuit board of the controller, and the work of the components electrically connected with the MCU is controlled by the MCU, and the wireless communication module is also integrated on the circuit board of the controller.

[0017] Preferably, the bottom of the filter bottle is provided with a blowdown assembly, and the blowdown assembly includes an electrically controlled blowdown valve electrically connected with the controller and controlled by the controller to open and close the blowdown valve.

[0018] Preferably, the valve shell is provided with a water inlet end and a check end, the check flow channel communicates the water inlet end and the check end, the check end and the check portion can form or release extrusion sealing, and the check adjusting structure controls the formation and release of the extrusion sealing under the action of the water pressure in the pre-filter, so as to close or open the check flow channel.

[0019] Preferably, the driving part is a valve stem, the reverse stopping part is a valve plug, the reverse stopping adjusting structure is an elastic return element, one end of the elastic return element is fixed to or abuts against the valve stem or the valve plug, the other end of the elastic return element is fixed to or abuts against the valve head of the pre-filter, and the valve plug is axially movable under the action of the elastic return element to close or open the reverse flow channel.

[0020] Preferably, the valve head is further provided with a guide groove, and the end of the valve stem and the reverse stopping adjusting structure are arranged in the guide groove.

[0021] Preferably, the driving part is a valve stem, the reverse stopping part is a valve plug, the reverse stopping adjusting structure is an elastic return element, one end of the elastic return element is fixed to or abuts against the valve stem or the valve plug, the other end of the elastic return element is fixed to or abuts against the valve seat, the valve seat is provided with a guide hole for axial movement of the valve stem, and the valve plug is axially movable under the action of the elastic return element.

[0022] Preferably, the valve shell is provided with at least one limiting part A at the water inlet end and at least one limiting part B at the reverse stopping end, the limiting part A is used to limit and fix the valve shell and the valve head of the pre-filter, and the limiting part B is used to control the axial movement distance of the valve plug when the valve plug closes the reverse flow channel to form a sufficient extrusion seal.

[0023] Preferably, the limiting part A is a limiting boss derived from the outer side in a circumferential direction, the limiting part B is a limiting boss derived from the inner side in a circumferential direction, and the valve plug has a conical structure.

[0024] Preferably, the limiting part A and the limiting part B are integrally formed with the valve shell.

[0025] Preferably, the built-in reverse stopping valve structure is further provided with a displacement sensor, the driving part is further provided with a magnetic induction element, the magnetic induction element can conduct the displacement sensor through magnetic force, and the magnetic induction element sends a signal of the operation of the reverse stopping valve to the controller of the pre-filter.

[0026] Preferably, the water inlet channel, the water outlet channel and the filter bottle assembly port are provided with isolation bushings, the isolation bushings, the valve shell and the valve body are made of inert materials or at least one side in contact with water is provided with an inert material coating, and the inert material is plastic, rubber or ceramic.

[0027] Preferably, the valve shell and the valve body are integrally injection molded by using plastic or rubber material respectively; the isolation bushings include a water inlet end isolation bushing, a water outlet end isolation bushing and an assembly end isolation bushing, and are integrally injection molded by using plastic or rubber material.

[0028] The utility model discloses beneficial effect is: the utility model simple structure, easy to install, check valve is arranged in the water way of the water outlet of the valve head of filter screen skeleton center flow, when the front filter sewage, realize reliable check control, avoid the water of outlet pipeline and lead to air entering, and the structure influence of prior art valve head is little, does not influence the installation of other intelligent control components of valve head;

[0029] When the front filter normal water, the water outlet opens, and the water pressure compresses the elastic reset element, and the valve body moves up, and the extrusion seal is released, when needing sewage, when opening sewage valve, the water pressure in the front filter communicates with the outside, and the water pressure reduces, and the elastic reset element resets, and the valve body moves down, until extrusion seal;

[0030] When the water flow of the outlet channel rear section, check valve displacement (elastic reset element is compressed), check valve opens, and the displacement sensor is conducted under the magnetic force, and the controller starts timing, when exceeding the preset time, the controller judges that the water is abnormal, and sends information to the user, this kind of situation is mainly aimed at the situation that the impeller of the magnetic induction impeller mechanism in the outlet channel does not rotate because of low water flow, when the water flow can drive the impeller to rotate, the magnetic steel of the impeller acts on the hall sensor respectively, and the water flow is calculated through the rotation speed of the impeller, when single water exceeds the preset value, the controller judges that the water is abnormal, and sends information to the user, when the product is normal, the filter unit is gradually blocked, and the pressure difference of the inlet channel and the outlet channel is bigger and bigger, when the pressure difference is bigger than the preset pressure difference, the controller controls the sewage assembly to open, and automatically flushes and discharges, after flushing and discharging, the controller controls the sewage assembly to close again. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, and obviously, the following description of the drawing is only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating creative labor.

[0032] Figure 1 It is the exploded view of the check valve of the utility model;

[0033] Figure 2 It is Figure 1 partial exploded view;

[0034] Figure 3 It is Figure 1 combination schematic view;

[0035] Figure 4 It is the structure schematic view of the valve head of the utility model;

[0036] Figure 5 is Figure 4 a partial sectional view of the valve head in use (valve open state);

[0037] Figure 6 is a partial sectional view of the valve head in use (valve open state);

[0038] Figure 7 is a partial sectional view of the valve head in use (valve open state);

[0039] Figure 8 is a schematic structural view of the utility model;

[0040] Figure 9 is a schematic structural view of the utility model.

[0041] In the figure: 1, valve shell, 11, water inlet end, 12, check end, 2, valve body, 21, valve rod, 22, valve plug, 3, check adjusting structure, 4, valve seat, 5, valve sleeve, 6, limit part A, 7, limit part B, 8, displacement sensor, 9, magnetic induction element, A valve head, B, check valve assembly cavity, C, magnetic induction impeller structure, D, hall sensor, E, pressure sensor, F, guide groove, G, filter bottle. DETAILED DESCRIPTION

[0042] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.

[0043] In the description of the utility model, it is understood that the orientation description, such as up, down, front, back, left, right and the like, is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, a specific orientation and operation, therefore, cannot be understood as the limitation of the utility model.

[0044] In the description of the utility model, if the first and the second are described for the purpose of distinguishing technical features, they cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0045] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installing and connecting should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme. EMBODIMENT

[0046] As Figures 1-4 shown, the pre-filter with built-in check valve and flow monitoring function includes a valve head A with an inlet channel, an outlet channel and a filter bottle assembly port, the filter bottle assembly port is assembled with a filter bottle G, the filter bottle G is provided with a filtering mechanism, the filtering mechanism includes a filter framework and a filter unit, the bottom of the filter bottle G is provided with a blowdown assembly, and a controller is further provided, the valve head A is provided with a check valve assembly cavity B, the check valve assembly cavity B is provided with a check valve, the check valve includes a valve shell 1, a valve body 2 and a check valve adjusting structure 3, the check valve assembly cavity B is arranged in the water channel of the outlet channel of the filter net framework center flowing to the valve head, the valve shell 1 is provided with a check flow channel, the valve body 2 includes a driving part and a check part, the check part is matched with the check flow channel, the check valve adjusting structure 3 is arranged in the driving part, and the check valve adjusting structure 3 can drive the driving part to drive the check part to close or open the check flow channel under the action of the internal water pressure of the pre-filter.

[0047] In this embodiment, a valve seat 4 is further included, the valve shell 1 is arranged in the valve seat 4, a valve sleeve 5 is arranged between the valve seat 4 and the valve shell 1, the check part is matched with the valve sleeve 5 to open or close the check flow channel, a flow sensor is fixedly arranged in the outlet channel and is electrically connected with the controller to obtain the water flow information of the outlet channel, the flow sensor adopts a Hall type flow sensor, which includes a magnetic induction impeller structure C arranged in the outlet channel and a matched Hall sensor D, the Hall sensor D is electrically connected with the controller, the inlet channel and the outlet channel are both provided with a pressure sensor E, the pressure sensor E can be electrically connected with the controller, the controller can be connected with a remote server or a user terminal through a wireless communication mode, the controller is provided with a remote communication unit, the remote communication unit includes a wireless communication module electrically connected with the circuit board of the controller, the controller has a processor function, the wireless communication module is any one or a combination of two of a 2G module, a 3G module, a 4G module, a 5G module and a WiFi module, and the remote server and the user terminal can receive information or remotely control the controller through the wireless communication module; at least one MCU is integrated on the circuit board of the controller, the working of the components electrically connected with the MCU is controlled by the MCU, and the wireless communication module is also integrated on the circuit board of the controller, the blowdown assembly includes an electrically controlled blowdown valve H, which is electrically connected with the controller and is controlled by the controller to realize the opening and closing of the electrically controlled blowdown valve H.

[0048] Specifically, in this embodiment, the valve shell 1 is provided with an inlet end 11 and a check end 12, the check flow channel communicates the inlet end 11 and the check end 12, and the check end 12 can form or release extrusion sealing with the check part, the check valve adjusting structure 3 controls the formation and release of the extrusion sealing under the action of the internal water pressure of the pre-filter, so as to close or open the check flow channel.

[0049] In this embodiment, the driving part is the valve stem 21, the non-return part is the valve plug 22, and the non-return adjustment structure 3 is an elastic return element. One end of the elastic return element is fixed to or abuts against the valve stem 21 or the valve plug 22, and the other end is fixed to or abuts against the valve head A of the pre-filter. The valve plug 22 can move axially under the drive of the elastic return element, thereby closing or opening the non-return flow channel.

[0050] Specifically, the valve plug 22 is in sliding sealing connection with the non-return valve assembly cavity B, the valve head A is further provided with a guide groove F, and the end of the valve stem 21 and the non-return adjustment structure 3 are both arranged in the guide groove F.

[0051] As a parallel implementation scheme, the driving part is the valve stem 21, the non-return part is the valve plug 22, and the non-return adjustment structure 3 is an elastic return element. One end of the elastic return element is fixed to or abuts against the valve stem 21 or the valve plug 22, and the other end is fixed to or abuts against the valve seat 4. The valve seat 4 is provided with a guide hole 41 for the axial movement of the valve stem 21, and the valve plug 22 can move axially under the drive of the elastic return element.

[0052] The two parallel schemes can also be combined to maximize the adjustment effect.

[0053] In this embodiment, the valve housing 1 is provided with at least one limiting part A6 at the water inlet end 11 and at least one limiting part B7 at the water outlet end 12. The limiting part A6 is used to limit and fix the valve housing 1 and the valve head A of the pre-filter, and the limiting part B7 is used to control the axial movement distance of the valve plug 22 when closing the non-return flow channel, so as to form a sufficient extrusion seal.

[0054] In this embodiment, the limiting part A6 is a limiting boss derived from the outer side, the limiting part B7 is a limiting boss derived from the inner side, and the valve plug 22 has a conical structure.

[0055] In this embodiment, the limiting part A6 and the limiting part B7 are integrally formed with the valve housing 1.

[0056] In this embodiment, the built-in non-return valve structure is further provided with a displacement sensor 8, and the driving part is further provided with a magnetic induction element 9. The magnetic induction element 9 can conduct the displacement sensor 8 through magnetic force, and send a signal of the operation of the non-return valve to the controller of the pre-filter.

[0057] In this embodiment, the water inlet channel, the water outlet channel, and the filter bottle assembly port are provided with an isolation bushing. The isolation bushing, the valve housing 1, and the valve body 2 are made of inert materials or at least one side in contact with water is provided with an inert material coating. The inert material is plastic, rubber, or ceramic.

[0058] In the embodiment, the valve shell 1 and the valve body 2 are integrally injection molded by plastic or rubber material respectively; the isolation bushing includes a water inlet end isolation bushing, a water outlet end isolation bushing and an assembly end isolation bushing, and is integrally injection molded by plastic or rubber material.

[0059] The utility model discloses the beneficial effect is: the utility model discloses simple structure, easy to install, check valve is arranged in the waterway of the water outlet of the filter screen framework center flow to valve head, when the front filter is discharged, realize reliable check control, avoid the water of outlet pipeline backwater and lead to air into, and the structure influence of prior art valve head is little, does not affect the installation of other intelligent control components of valve head,

[0060] When the front filter is normally used, the water outlet is opened, the water pressure compresses the elastic reset element, the valve body moves up, and the extrusion seal is released, when the front filter needs to be discharged, the water pressure in the front filter is connected with the outside when the blowdown valve is opened, the water pressure is reduced, the elastic reset element resets, the valve body moves down, and the extrusion seal is released.

[0061] When there is water flow in the rear section of the water outlet channel, the check valve is displaced (the elastic reset element is compressed), the check valve is opened, the displacement sensor is conducted under the action of magnetic force, and the controller starts timing, when the preset time is exceeded, the controller judges that the water use is abnormal, and sends information to the user; this situation is mainly aimed at the situation that the impeller of the magnetic induction impeller mechanism in the water outlet channel does not rotate due to low water flow. When the water flow can drive the impeller to rotate, the positive and negative poles of the magnetic steel on the impeller act on the Hall sensor, the water flow is calculated through the rotation speed of the impeller, when the single water use exceeds the preset value, the controller judges that the water use is abnormal, and sends information to the user; when the product is normally used, the filter unit is gradually clogged, the clogging is more and more serious, and the pressure difference between the water inlet channel and the water outlet channel is larger and larger, when the pressure difference is larger than the preset pressure difference value, the controller controls the blowdown assembly to open, and automatically flushes and discharges, after the flushing and discharging are completed, the controller controls the blowdown assembly to close again.

[0062] In the embodiment, the filter framework is a filter screen framework, and the filter unit is a filter screen, PP cotton or a filter membrane; or the filter framework is a laminated sheet framework, and the filter unit is a filter laminated sheet.

[0063] The above-mentioned embodiment is only a preferred scheme of the utility model, and does not limit the utility model in any form, and other variants and modifications can be made without exceeding the technical scheme recorded in the claims.

Claims

1. A pre-filter with built-in check valve and flow monitoring function, comprising a valve head (A) with an inlet channel, an outlet channel and a filter bottle assembly port, the filter bottle assembly port is assembled with a filter bottle (G), the filter bottle (G) is provided with a filter mechanism, the filter mechanism comprises a filter framework and a filter unit, and a controller is further provided, characterized in that: The valve head (A) is provided with a check valve assembly cavity (B), and the check valve assembly cavity (B) is provided with a check valve, the check valve comprises a valve shell (1), a valve body (2) and a check adjusting structure (3), the check valve assembly cavity (B) is arranged in the water channel of the water outlet channel of the filter framework center to the valve head (A), the valve shell (1) is provided with a check flow channel, the valve body (2) comprises a driving part and a check part, the check part is matched with the check flow channel, the check adjusting structure (3) is arranged on the driving part, and the check adjusting structure (3) can drive the driving part to drive the check part to close or open the check flow channel under the action of the internal water pressure of the pre-filter.

2. The pre-filter with built-in check valve and flow monitoring function according to claim 1, characterized in that: Further comprising a valve seat (4), the valve shell (1) is arranged in the valve seat (4), a valve sleeve (5) is arranged between the valve seat (4) and the valve shell (1), and the check part is matched with the valve sleeve (5) to open or close the check flow channel.

3. The pre-filter with built-in check valve and flow monitoring function according to claim 1, characterized in that: A flow sensor is fixedly arranged in the water outlet channel and is electrically connected with the controller to obtain the water flow information of the water outlet channel.

4. The pre-filter with built-in check valve and flow monitoring function according to claim 3, characterized in that: The flow sensor adopts a Hall type flow sensor, which comprises a magnetic induction impeller structure (C) arranged in the water outlet channel and a matched Hall sensor (D), and the Hall sensor (D) is electrically connected with the controller.

5. The pre-filter with flow monitoring function and built-in check valve according to claim 1 or 2 or 3 or 4, characterized in that: The water inlet channel and the water outlet channel are both provided with a pressure sensor (E), and the pressure sensor (E) is electrically connected with the controller.

6. The pre-filter with flow monitoring function and built-in check valve according to claim 1 or 2 or 3 or 4, characterized in that: The controller can be connected with a remote server or a user terminal through a wireless communication mode, the controller is provided with a remote communication unit, and the remote communication unit comprises a wireless communication module electrically connected with the circuit board of the controller.

7. The pre-filter with built-in check valve and flow monitoring function according to claim 6, characterized in that: The controller has a processor function, the wireless communication module is any one or a combination of two of 2G module, 3G module, 4G module, 5G module and WiFi module, the remote server and the user terminal can receive information or remotely control the controller through the wireless communication module, at least one MCU is integrated on the circuit board of the controller, the work of the components electrically connected with the MCU is controlled by the MCU, and the wireless communication module is also integrated on the circuit board of the controller.

8. The pre-filter with flow monitoring function of the built-in check valve according to claim 1 or 2 or 3 or 4, characterized in that: The filter bottle is provided with a blowdown assembly, the blowdown assembly comprises an electric control blowdown valve (H) electrically connected with the controller and controlled by the controller to realize the opening and closing of the electric control blowdown valve (H).

9. The pre-filter with flow monitoring function of the built-in check valve according to claim 1 or 2 or 3 or 4, characterized in that: The valve shell (1) is provided with a water inlet end (11) and a check end (12), the check flow channel communicates the water inlet end (11) and the check end (12), the check end (12) and the check part can form or release extrusion sealing, the check adjusting structure (3) controls the formation and release of the extrusion sealing under the action of the internal water pressure of the pre-filter, and then closes or opens the check flow channel.

10. The pre-filter with flow monitoring function and built-in check valve according to claim 1 or 2 or 3 or 4, characterized in that: The driving part is a valve rod (21), the check part is a valve plug (22), the check adjusting structure (3) is an elastic reset element, one end of the elastic reset element is fixed or abuts against the valve rod (21) or the valve plug (22), the other end of the elastic reset element is fixed or abuts against the valve head (A), and the valve plug (22) can move axially under the action of the elastic reset element.

11. The pre-filter with built-in check valve and flow monitoring function according to claim 10, characterized in that: The valve head (A) is also provided with a guide groove (F), and the end of the valve rod (21) and the check adjusting structure (3) are arranged in the guide groove (F).

12. The pre-filter with built-in check valve and flow monitoring function according to claim 2, characterized in that: The driving part is a valve rod (21), the non-return part is a valve plug (22), the non-return adjusting structure (3) is an elastic reset element, one end of the elastic reset element is fixed or abuts against the valve rod (21) or the valve plug (22), the other end is fixed or abuts against the valve seat (4), the valve seat (4) is provided with a guide hole (41) for axial movement of the valve rod (21), and the valve plug (22) can be axially moved under the driving of the elastic reset element.

13. The pre-filter with flow monitoring function of the built-in check valve according to claim 1 or 2 or 3 or 4, characterized in that: The valve housing (1) is provided with at least one limiting part A (6) at the water inlet end (11) and at least one limiting part B (7) at the non-return end (12), the limiting part A (6) is used to limit and fix the valve housing (1) and the valve head (A), and the limiting part B (7) is used to control the axial movement distance of the valve plug (22) when the valve plug (22) closes the non-return flow channel, so as to fully form the extrusion seal.

14. The pre-filter with built-in check valve and flow monitoring function according to claim 13, characterized in that: The limiting part A (6) is a limiting boss derived from the outer side, the limiting part B (7) is a limiting boss derived from the inner side, and the valve plug (22) is in a conical structure.

15. The pre-filter with built-in check valve and flow monitoring function according to claim 14, characterized in that: The limiting part A (6) and the limiting part B (7) are integrally formed with the valve housing (1).

16. The pre-filter with flow monitoring function of the built-in check valve according to claim 1 or 2 or 3 or 4, characterized in that: The non-return valve is also provided with a displacement sensor (8), and the driving part is also provided with a magnetic induction element (9), which can conduct the displacement sensor (8) through magnetic force and send a signal of non-return valve operation to the controller of the pre-filter.

17. The pre-filter with flow monitoring function of the built-in check valve according to claim 1 or 2 or 3 or 4, characterized in that: The water inlet channel, the water outlet channel and the filter bottle assembly port are provided with an isolation bushing, the isolation bushing, the valve housing (1) and the valve body (2) are made of inert materials or at least one side in contact with water is provided with an inert material coating, and the inert material is plastic, rubber or ceramic.

18. The pre-filter with built-in check valve and flow monitoring function according to claim 12, characterized in that: The valve housing (1) and the valve body (2) are integrally injection molded by plastic or rubber material respectively; the isolation bushing includes a water inlet end isolation bushing, a water outlet end isolation bushing and an assembly end isolation bushing, and is integrally injection molded by plastic or rubber material.

19. The pre-filter with flow monitoring function of the built-in check valve according to claim 1 or 2 or 3, characterized in that: The filter framework is a filter screen framework, and the filter unit is a filter screen or PP cotton or a filter membrane; or the filter framework is a laminated framework, and the filter unit is a filter laminated sheet.

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