Novel self-cleaning filter

Abstract

The invention discloses a novel self-cleaning filter, which relates to the technical field of filters, and comprises an electrical control unit, a thermal control unit and a maintenance unit, wherein the electrical control unit is electrically connected with the thermal control unit and the maintenance unit; the electrical control unit is used for providing power for self-cleaning of the maintenance unit, the thermal control unit is used for monitoring the pressure and the pressure difference in the operation process of the filter and deciding starting of a cleaning program according to data, and the maintenance unit forms a basic framework of the filter. The motor is used for controlling the water flow direction and connecting the filter with an external system, and the motor has a reverse rotation function and drives the brush to rotate reversely by adding electrical elements such as a contactor; the bent brush which rotates and operates in the same direction for a long time is rotated reversely, so that the brush is straightened, the cleaning function of the brush is recovered, the normal operation output of the self-cleaning filter is recovered, the purposes of saving spare parts, operating cost and manpower are achieved, and safe and reliable operation of power plant equipment is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of filters, in particular to a novel self-cleaning filter. Background Art

[0002] At present, there are some common problems with the self-cleaning filters widely used in power plants and other industrial applications. These filters are usually designed so that after the water flows into the filter from the inlet, it passes through the filter from the inside to the outside, trapping impurities on the inner surface of the filter. In order to maintain the filtration efficiency, a motor-driven brush is usually used to regularly clean the accumulation on the filter. However, in actual operation, especially after working continuously for several months, the brush may bend and deform due to long-term unidirectional rotation, which will reduce the effective length of the brush and thus affect the brush's ability to clean the inner surface of the filter. As the impurities accumulated on the filter increase, the flow rate of the filter will drop significantly, from the initial 120 tons / hour to 50 tons / hour or even lower. In addition, the pressure difference between the inner and outer surfaces of the filter increases, resulting in the need to trigger the cleaning signal more frequently, but the conventional cleaning procedure cannot effectively reduce this pressure difference, making the filter unable to meet the expected performance requirements. In addition, in order to overcome these problems, it is often necessary to increase the frequency of filter inspection and manually clean the filter, which not only increases maintenance costs, but may also lead to waste of water resources, because each cleaning will discharge about 0.2 cubic meters of water. What is more serious is that as the water quality of the self-cleaning filter's effluent deteriorates, the aging rate of the membrane components in the downstream ultrafiltration equipment may be accelerated.

[0003] The existing solution is usually to maintain the normal operation of the system by regularly replacing the bent brushes or frequent manual intervention, but this does not fundamentally solve the problem, but increases operating costs and human resource consumption. Therefore, it is necessary to design a new self-cleaning filter that can overcome the above shortcomings and improve the reliability and economy of the system. Summary of the invention

[0004] In view of the above problems that the existing filter brushes are bent, resulting in reduced cleaning efficiency, frequent filter screen clogging, flow rate reduced to 50t / h, increased pressure difference, frequent manual cleaning, increased costs and affecting downstream equipment. A new self-cleaning filter is proposed.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: including, an electrical control unit, a thermal control unit and a maintenance unit; wherein, the electrical control unit is electrically connected to the thermal control unit and the maintenance unit; the electrical control unit is used to provide power for self-cleaning of the maintenance unit, the thermal control unit is used to monitor the pressure and pressure difference during the operation of the filter, and determine the start of the cleaning program according to the data, and the maintenance unit constitutes the basic architecture of the filter, which is used to control the water flow direction and the connection between the filter and the external system.

[0006] As a preferred solution of the novel self-cleaning filter described in the present invention, the maintenance unit includes a filter body, a butterfly valve, a water inlet pipe, a water outlet pipe, a filter screen and a self-cleaning component; the filter body is used to filter sewage, the water inlet pipe is located at the water inlet end of the filter body, the water outlet pipe is located at the water outlet end of the filter body, the number of the butterfly valves is two, which are respectively installed on the water inlet pipe and the water outlet pipe, the filter screen is located inside the filter body, and the self-cleaning component is installed on the inner wall of the filter screen.

[0007] As a preferred solution of the novel self-cleaning filter described in the present invention, the self-cleaning component includes a self-cleaning bearing installed inside the filter, a self-cleaning bracket arranged on the self-cleaning bearing, and a self-cleaning brush arranged on the self-cleaning bracket.

[0008] As a preferred solution of the novel self-cleaning filter described in the present invention, two groups of self-cleaning brackets are installed on the self-cleaning bearing, each group of the self-cleaning brackets has four self-cleaning brackets, and the self-cleaning brackets are arranged in a ring array, and the self-cleaning brush is installed at the end of the self-cleaning bracket, and the outer side of the self-cleaning brush is in contact with the inner wall of the filter.

[0009] As a preferred solution of the new self-cleaning filter described in the present invention, the electrical control unit includes a motor installed on one side of the filter body, a contactor installed on the motor, and auxiliary contacts arranged on the contactor; the motor is electrically connected to the contactor and the auxiliary contacts.

[0010] As a preferred solution of the novel self-cleaning filter described in the present invention, the contactor is used to control the on and off of the power supply of the motor, the auxiliary contacts are used in conjunction with the contactor, and the auxiliary contacts are used to indicate the working status of the contactor or participate in the locking logic to prevent misoperation.

[0011] As a preferred solution of the novel self-cleaning filter described in the present invention, the contactor is installed at the position of the motor control box, and the contactor installation needs to be sealed, and the auxiliary contact is installed on one side of the contactor.

[0012] As a preferred solution of the novel self-cleaning filter described in the present invention, the output end of the motor is connected to the self-cleaning bearing.

[0013] As a preferred solution of the new self-cleaning filter described in the present invention, the thermal control unit includes a pressure and pressure difference measuring point sensor, a time control chip, and a sewage valve control component; wherein the pressure and pressure difference measuring point sensor and the time control chip are electrically connected, the pressure and pressure difference measuring point sensor are installed at the inlet and outlet positions of the filter body, and the time control chip is located on the control panel of the filter body.

[0014] As a preferred solution of the novel self-cleaning filter described in the present invention, the drain valve control assembly includes a drain pipe installed on the filter body, and a drain valve arranged on the drain pipe.

[0015] The beneficial effects of the present invention are as follows: by adding electrical components such as contactors, the motor is provided with a reversing function, thereby driving the brush to reverse; the bent brush that has been rotating in the same direction for a long time is reversed to make the brush straight, thereby restoring its cleaning function and restoring the normal operating output of the self-cleaning filter, thereby achieving the purpose of saving spare parts, operating costs, and manpower, and ensuring the safe and reliable operation of power plant equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative labor.

[0017] Figure 1 It is a schematic diagram of the overall structure of the self-cleaning filter in the present invention.

[0018] Figure 2 It is a plan view of the self-cleaning filter in the present invention.

[0019] Figure 3 It is a schematic diagram of the internal structure of the self-cleaning filter in the present invention.

[0020] Figure 4 It is a cross-sectional view of the filter screen in the self-cleaning filter of the present invention.

[0021] Figure 5 It is a system diagram of the electrical control unit and the thermal control unit in the present invention.

[0022] Figure 6It is the electrical schematic diagram of the self-cleaning filter in the present invention.

[0023] Figure numerals: 100, electrical control unit; 101, motor; 102, contactor; 103, auxiliary contact; 200, thermal control unit; 201, pressure and pressure difference measuring point sensor; 202, time control chip; 203, sewage valve control assembly; 203a, sewage pipe; 203b, sewage valve; 300, maintenance unit; 301, filter body; 302, butterfly valve; 303, water inlet pipe; 304, water outlet pipe; 305, filter screen; 306, self-cleaning assembly; 306a, self-cleaning bearing; 306b, self-cleaning bracket; 306c, self-cleaning brush. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0027] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0028] Example 1, reference Figure 1 to Figure 4 , which is the first embodiment of the present invention, and this embodiment provides a new self-cleaning filter, including an electrical control unit 100, a thermal control unit 200 and a maintenance unit 300; wherein the electrical control unit 100 is electrically connected to the thermal control unit 200 and the maintenance unit 300; the electrical control unit 100 is used to provide power for the self-cleaning of the maintenance unit 300, the thermal control unit 200 is used to monitor the pressure and pressure difference during the operation of the filter, and determine the start of the cleaning program based on the data, and the maintenance unit 300 constitutes the basic architecture of the filter, which is used to control the water flow direction and the connection between the filter and the external system.

[0029] Among them, the electrical control unit 100, the thermal control unit 200 and the maintenance unit 300 work closely together to ensure the normal operation of the self-cleaning filter. The electrical control unit 100 provides power for the self-cleaning of the maintenance unit 300, the thermal control unit 200 decides when to start the cleaning program by monitoring the operating status of the filter, and the maintenance unit 300 is the basis for performing clear tasks.

[0030] When the thermal control unit 200 detects that cleaning is required, it will notify the electrical control unit 100 to start the cleaning program. The electrical control unit 100 controls the motor 101 to start and perform the cleaning work. At the same time, the drain valve in the maintenance unit 300 opens to remove the impurities cleaned. In this way, the system realizes an automated cleaning process, reduces the need for manual intervention, and improves the reliability of operating efficiency.

[0031] The maintenance unit 300 includes a filter body 301, a butterfly valve 302, an inlet pipe 303, an outlet pipe 304, a filter screen 305 and a self-cleaning component 306; the filter body 301 is used to filter sewage, the inlet pipe 303 is located at the inlet end of the filter body 301, the outlet pipe 304 is located at the outlet end of the filter body 301, there are two butterfly valves 302, which are respectively installed on the inlet pipe 303 and the outlet pipe 304, the filter screen 305 is located inside the filter body 301, and the self-cleaning component 306 is installed on the inner wall of the filter screen 305.

[0032] The filter body 301 is the main frame of the entire filtration system, responsible for accommodating the filter medium and the self-cleaning component 306. It is usually a closed container, with a filter screen 305 installed inside, and is provided with a water inlet and a water outlet to allow water to flow through. There are two butterfly valves 302, which are used to control the water inlet and water outlet flow of the filter body 301. When self-cleaning is required, the butterfly valve 302 will be temporarily closed to isolate the filter body 301 to ensure that the normal operation of the system will not be affected during the cleaning process. The water inlet pipe 303 is connected to the filter body 301. The water inlet end of 01 is responsible for guiding the water source to be filtered into the inside of the filter body 301, and the outlet pipe 304 is connected to the water outlet end of the filter body 301, and transports the filtered clean water source to the next processing link or the final destination; the filter screen 305 is installed inside the filter body 301, and is one of the core components of the filtration system. Its main function is to intercept impurities in the flowing water to ensure the quality of the outlet water. The filter screen 305 is usually composed of a fine grid made of corrosion-resistant material, and different pore sizes can be selected according to different filtration accuracy requirements.

[0033] The self-cleaning component 306 includes a self-cleaning bearing 306a installed inside the filter 305, a self-cleaning bracket 306b arranged on the self-cleaning bearing 306a, and a self-cleaning brush 306c arranged on the self-cleaning bracket 306b; two groups of self-cleaning brackets 306b are installed on the self-cleaning bearing 306a, each group of self-cleaning brackets 306b has four self-cleaning brackets 306b, and the self-cleaning brackets 306b are arranged in a ring array, and the self-cleaning brush 306c is installed at the end of the self-cleaning bracket 306b, and the outer side of the self-cleaning brush 306c is in contact with the inner wall of the filter 305.

[0034] The self-cleaning component 306 is designed to automatically remove impurities on the inner wall of the filter 305 to ensure the continuous and efficient operation of the filter body 301, and the self-cleaning component 306 will reverse under certain conditions to restore the straightness of the self-cleaning brush 306c and improve its cleaning efficiency.

[0035] The self-cleaning bearing 306a is the core of the self-cleaning component 306 and is installed at the inner center of the filter 305. It is responsible for supporting the self-cleaning bracket 306b and ensuring that they can rotate smoothly. The self-cleaning bearing 306a is usually designed to withstand a certain load and wear, and has good lubrication properties to reduce friction and ensure long-term reliable operation. The self-cleaning bracket 306b is arranged on the self-cleaning bearing 306a. There are two groups of self-cleaning brackets 306b in each group. These self-cleaning brackets 306b are distributed in a ring array, that is, they are evenly arranged around the center of the self-cleaning bearing 306a. Such a layout helps to ensure that all parts of the filter 305 can be effectively cleaned. The self-cleaning bracket 306b is designed to support the self-cleaning brush 306c and can rotate under the drive of the motor 101 to cover the entire inner surface of the filter 305.

[0036] The self-cleaning brush 306c is installed at the end of the self-cleaning bracket 306b, and its outer side is in close contact with the inner wall of the filter 305. The self-cleaning brush 306c is designed to effectively remove impurities attached to the filter 305. When the motor 101 drives the self-cleaning bracket 306b to rotate, the self-cleaning brush 306c will slide along the inner wall of the filter 305, thereby removing the sediment thereon. The self-cleaning brush 306c is usually made of a material with a certain hardness and wear resistance, which can effectively remove dirt without damaging the surface of the filter 305.

[0037] Operation process: When the system detects that the pressure difference on the filter 305 exceeds the set threshold, the control system will start the self-cleaning program. At this time, the motor 101 drives the self-cleaning bearing 306a to rotate, and the self-cleaning bracket 306b on the self-cleaning bearing 306a rotates accordingly. The self-cleaning brush 306c installed at its end begins to move along the inner wall of the filter 305 to clear the attached impurities. Through such mechanical movement, the filter 305 can be effectively kept clean, reducing the need for manual maintenance and ensuring the filtering effect of the filter body 301.

[0038] Example 2, reference Figure 5 and Figure 6 , which is the second embodiment of the present invention, is based on the previous embodiment, and the difference is: the electrical control unit 100 includes a motor 101 installed on one side of the filter body 301, a contactor 102 installed on the motor 101, and an auxiliary contact 103 arranged on the contactor 102; the motor 101 is electrically connected to the contactor 102 and the auxiliary contact 103.

[0039] The electrical control unit 100 is one of the important components of the self-cleaning filter. Its function is to control the start and stop of the motor 101 and to realize the forward and reverse switching of the motor 101 to ensure that the self-cleaning brush 306c can restore the upright state and continue to effectively clean the filter 305.

[0040] The contactor 102 is used to control the power on and off of the motor 101. The auxiliary contact 103 is used in conjunction with the contactor 102. The auxiliary contact 103 is used to indicate the working status of the contactor 102 or participate in the locking logic to prevent misoperation. The contactor 102 is installed at the control box of the motor 101, and the installation of the contactor 102 needs to be sealed. The auxiliary contact 103 is installed on one side of the contactor 102. The output end of the motor 101 is connected to the self-cleaning bearing 306a.

[0041] The motor 101 is a core component of the electrical control unit 100, and is responsible for providing power for the self-cleaning brush 306c. The motor 101 is installed on one side of the filter body 301, and is connected to the self-cleaning brush 306c through the output end of the motor 101. When the motor 101 is started, it generates power through rotation, driving the self-cleaning brush 306c to rotate, thereby clearing impurities on the filter screen 305. In addition, the motor 101 can also achieve reverse rotation under the command of the control system, and the self-cleaning brush 306c that is bent due to long-term unidirectional rotation is corrected by reversing the self-cleaning brush 306c, so that it can restore upright and continue to work effectively; the contactor 102 is a switch device for controlling the power on and off of the motor 101. It is installed on the motor 101. The contactor 102 is connected to the power line of the motor 101 through its main contacts, and controls the start and stop of the motor 101 by closing or disconnecting the main contacts;

[0042] In addition, the contactor 102 also has an auxiliary contact 103 for feedback of the working status of the contactor 102 to help achieve forward and reverse switching of the motor 101; the installation position of the contactor 102 is usually sealed for the convenience of operation and maintenance to prevent dust and moisture from entering and affecting the normal operation of the electrical equipment.

[0043] Auxiliary contact 103 is an additional electrical contact installed on contactor 102, which is usually used to feedback the working status of contactor 102 and help the control system achieve closed-loop control; auxiliary contact 103 can provide additional signal output when contactor 102 is actuated, for example, to indicate whether contactor 102 is correctly closed, or participate in control logic, such as achieving interlock protection when motor 101 is switched forward and reverse. The design of auxiliary contact 103 helps to enhance the safety of the system and prevent equipment damage caused by misoperation.

[0044] Through the design of the above electrical control unit 100, the forward and reverse rotation control of the motor 101 is realized, thereby solving the problem of the self-cleaning brush 306c bending due to long-term unidirectional rotation, ensuring the normal operation of the filter body 301, and saving spare parts, operating costs and manpower.

[0045] Operation process: When the motor 101 needs to reverse, the control system will issue a command to make the contactor 102 switch the power phase sequence, so that the motor 101 reverses. In this way, the self-cleaning brush 306c that was originally bent due to long-term unidirectional rotation can be restored to an upright position through reversal, thereby restoring the cleaning function of the motor. At the same time, the automatic locking function of the contactor 102 can prevent power misoperation accidents from occurring during the switching process.

[0046] Example 3, reference Figure 1 to Figure 6 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the thermal control unit 200 includes a pressure and pressure difference measuring point sensor 201, a time control chip 202, and a drain valve control component 203; wherein the pressure and pressure difference measuring point sensor 201 and the time control chip 202 are electrically connected, the pressure and pressure difference measuring point sensor 201 is installed at the inlet and outlet positions of the filter body 301, and the time control chip 202 is located on the control panel of the filter body 301.

[0047] The sewage valve control assembly 203 includes a sewage pipe 203a installed on the filter body 301 and a sewage valve 203b arranged on the sewage pipe 203a.

[0048] The thermal control unit 200 is a key part of the self-cleaning filter system for monitoring and controlling the operating status of the filter. The pressure and pressure difference measuring point sensor 201 is used to monitor the pressure and pressure difference at both ends of the inlet and outlet of the filter body 301 in real time. When the accumulation of impurities on the filter screen 305 causes the pressure difference between the inlet and outlet to increase, the pressure and pressure difference measuring point sensor 201 will monitor this change and send a signal to the control system. It is usually installed at the inlet and outlet of the filter body 301, usually installed on the outside of the pipeline, and can directly measure the pressure or pressure difference of the fluid.

[0049] The time control chip 202 is located on the control panel of the filter body 301. It is responsible for receiving data from the pressure and pressure difference measuring point sensor 201, and starting the cleaning program according to the preset time interval or pressure difference condition. It can automatically trigger the cleaning action according to the preset time period, or it can start cleaning immediately when it detects that the pressure difference exceeds the set threshold. The time control chip 202 communicates with the pressure and pressure difference measuring point sensor 201 through an electrical connection to obtain real-time monitoring data and make corresponding control decisions based on it.

[0050] The sewage valve control component 203 is responsible for controlling the sewage discharge process to ensure that the impurities on the filter screen 305 are discharged through the sewage discharge pipe 203a during the cleaning process.

[0051] The sewage valve 203b is installed on the sewage pipe 203a and is opened and closed by the control system. When sewage needs to be discharged, the control system issues a command to open the sewage valve 203b to discharge impurities. After cleaning is completed, the sewage valve 203b is closed.

[0052] The rest of the structure is the same as that of Example 2.

[0053] Operation process: The pressure and pressure difference measuring point sensor 201 monitors the pressure and pressure difference at both ends of the inlet and outlet of the filter body 301 in real time, and the data is transmitted to the time control chip 202 through electrical connection. The time control chip 202 determines whether it is necessary to start the cleaning program based on the data transmitted by the pressure and pressure difference measuring point sensor 201. If the pressure difference exceeds the preset value or reaches the preset time, the control system will start the cleaning program. After the cleaning program is started, the time control chip 202 sends a signal to the electrical control unit 100 to start the motor 101, driving the self-cleaning brush 306c to rotate. At the same time, the control system sends a command to open the drain valve 203b to prepare to discharge the cleaned impurities. During the cleaning process, the impurities are discharged from the filter body 301 through the drain pipe 203a. After cleaning is completed, the control system closes the drain valve 203b to end the cleaning process.

[0054] Through such a design, the thermal control unit 200 can automatically monitor the working status of the filter body 301 and start the cleaning program when necessary, thereby ensuring the efficient operation of the filter, reducing maintenance workload, and improving the reliability and economy of the system.

[0055] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0056] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A new self-cleaning filter, characterized by: include, An electrical control unit (100), a thermal control unit (200) and a maintenance unit (300); The electrical control unit (100) is electrically connected to the thermal control unit (200) and the maintenance unit (300); the electrical control unit (100) is used to provide power for the self-cleaning of the maintenance unit (300); the thermal control unit (200) is used to monitor the pressure and pressure difference during the operation of the filter and determine the start of the cleaning program based on the data; the maintenance unit (300) constitutes the basic architecture of the filter and is used to control the water flow direction and the connection between the filter and the external system.

2. A novel self-cleaning filter as claimed in claim 1, characterized in that: The maintenance unit (300) comprises a filter body (301), a butterfly valve (302), a water inlet pipe (303), a water outlet pipe (304), a filter screen (305) and a self-cleaning component (306); The filter body (301) is used to filter sewage, the water inlet pipe (303) is located at the water inlet end of the filter body (301), the water outlet pipe (304) is located at the water outlet end of the filter body (301), there are two butterfly valves (302), which are respectively installed on the water inlet pipe (303) and the water outlet pipe (304), the filter net (305) is located inside the filter body (301), and the self-cleaning component (306) is installed on the inner wall of the filter net (305).

3. A novel self-cleaning filter as claimed in claim 2, characterized in that: The self-cleaning component (306) comprises a self-cleaning bearing (306a) installed inside the filter (305), a self-cleaning bracket (306b) arranged on the self-cleaning bearing (306a), and a self-cleaning brush (306c) arranged on the self-cleaning bracket (306b).

4. A novel self-cleaning filter as claimed in claim 3, characterized in that: Two groups of self-cleaning brackets (306b) are installed on the self-cleaning bearing (306a), each group of the self-cleaning brackets (306b) has four self-cleaning brackets (306b), and the self-cleaning brackets (306b) are arranged in a ring array. The self-cleaning brush (306c) is installed at the end of the self-cleaning bracket (306b), and the outer side of the self-cleaning brush (306c) is in contact with the inner wall of the filter screen (305).

5. A novel self-cleaning filter as claimed in claim 4, characterized in that: The electrical control unit (100) comprises a motor (101) mounted on one side of the filter body (301), a contactor (102) mounted on the motor (101), and an auxiliary contact (103) arranged on the contactor (102); The motor (101) is electrically connected to the contactor (102) and the auxiliary contact (103).

6. A novel self-cleaning filter as claimed in claim 5, characterized in that: The contactor (102) is used to control the on and off of the power supply of the motor (101); the auxiliary contact (103) is used in conjunction with the contactor (102); the auxiliary contact (103) is used to indicate the working state of the contactor (102) or participate in the locking logic to prevent misoperation.

7. A novel self-cleaning filter as claimed in claim 6, characterized in that: The contactor (102) is installed at the control box of the motor (101), and the installation of the contactor (102) needs to be sealed, and the auxiliary contact (103) is installed on one side of the contactor (102).

8. A novel self-cleaning filter as claimed in claim 7, characterized in that: The output end of the motor (101) is connected to the self-cleaning bearing (306a).

9. A novel self-cleaning filter as claimed in claim 1, characterized in that: The thermal control unit (200) comprises a pressure and pressure difference measuring point sensor (201), a time control chip (202), and a drain valve control component (203); The pressure and pressure difference measuring point sensors (201) and the time control chip (202) are electrically connected, the pressure and pressure difference measuring point sensors are installed at the inlet and outlet positions of the filter body (301), and the time control chip (202) is located on the control panel of the filter body (301).

10. A novel self-cleaning filter as claimed in claim 9, characterized in that: The sewage valve control assembly (203) comprises a sewage pipe (203a) installed on the filter body (301), and a sewage valve (203b) arranged on the sewage pipe (203a).

Images