Filter and flushing and filtering device for air-conditioning water system

Abstract

The present invention discloses a filter and a flushing and filtering device for an air-conditioning water system. The filter includes an installation pipe having a water inlet, a backwashing inlet, and a backwashing outlet. The filtering mechanism includes a first filtering component and a second filtering component. The first filtering component includes a first positioning ring, a first filter screen, and a first closing piece; the second filtering component includes a second positioning ring, a second filter screen, and a second closing piece. The first positioning ring and the second positioning ring are respectively fixed to the inner pipe wall of the installation pipe. The first filter screen and the second filter screen are respectively movably arranged within the first positioning ring and the second positioning ring. During backwashing, the first closing piece and the second closing piece are deformed to generate a thrust on the water body located between the first filter screen and the second filter screen, so that the impurities adsorbed near the surfaces of the first filter screen and the second filter screen fall off and dissolve into the water body and are discharged from the backwashing outlet, which can periodically restore the filtering capacity of the first filter screen and the second filter screen without disassembling and cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to a filter and a flushing and filtering device for an air-conditioning water system. Background Art

[0002] For the water-cooled air-conditioning system of large public buildings, welded steel pipes are mostly used for air-conditioning water pipes. During the transportation, storage, and installation of welded steel pipes, a large amount of dust and impurities will adhere to the inner wall, and floating rust will be generated. There will be welding slag and coating at the welding joint position. If these impurities exist in the pipeline, they will enter the equipment and instruments along with the water flow, causing equipment damage or instrument malfunction, and affecting the overall operation of the system; therefore, before the operation of the air-conditioning system, it is necessary to flush, remove rust, and coat the entire pipeline system to ensure that the inner wall of the pipeline and the circulating water quality in the pipeline meet the operation requirements of the air-conditioning system.

[0003] The traditional flushing of the air-conditioning water system usually adopts the water flushing method. Generally, the pipeline is first filled with water and circulated to wash the pipe wall, and the impurities are carried away by the flowing water body and then the water is discharged. After repeating the full water replacement two to three times, then, under the state of full water circulation in the pipeline, the method of feeding water at one end and discharging water at the other end is adopted to gradually discharge the pipeline impurities. This method will undoubtedly use a large amount of clean water and generate a large amount of waste water, and the flushing waste water does not meet the requirements of municipal waste water discharge and needs to be pretreated before being discharged into the municipal sewage system. This water flushing method not only generates a large economic cost, but also greatly wastes water resources, which does not meet the requirements of green environmental protection in modern society. On the basis of the above method, there is also a method of purifying the flushing waste water by adding a filter, but the dirt accumulation speed on the filter layer in the filter is fast, and it is easy to reach the upper limit of the filtering capacity in a short period, and the filter layer inside the filter is inconvenient to disassemble and clean, thus affecting the use efficiency of the filter. Summary of the Invention

[0004] Based on this, in view of the problem that the dirt accumulation speed on the filter layer in the traditional filter is fast, it is necessary to provide a filter and a flushing and filtering device for an air-conditioning water system.

[0005] One aspect of the present application provides a filter, including:

[0006] An installation pipe having a water inlet, a backwashing inlet, and a backwashing outlet, the water inlet and the backwashing inlet are oppositely arranged along a first direction, and the first direction is the axial direction of the installation pipe.

[0007] At least one filtering mechanism is arranged in the installation pipe, on the side of the backwashing inlet close to the water inlet, the filtering mechanism includes a first filtering component and a second filtering component, the first filtering component includes a first positioning ring, a first filter screen, and a first closing piece; the second filtering component includes a second positioning ring, a second filter screen, and a second closing piece.

[0008] The first positioning ring and the second positioning ring are arranged along the first direction and are respectively fixed to the inner pipe wall of the installation pipe. The facing directions of the first positioning ring and the second positioning ring are opposite. The first positioning ring is close to the backwash inlet.

[0009] The first filter screen and the second filter screen are respectively movably arranged in the first positioning ring and the second positioning ring, and are respectively blocked from moving along their facing directions across the positioning ring where they are located.

[0010] The first closing piece and the second closing piece are connected to each other, and are respectively fixedly arranged at the bottom of the first filter screen and the bottom of the second filter screen. The material of the first closing piece and the material of the second closing piece are elastic materials.

[0011] Optionally, the filter further includes:

[0012] An installation sleeve rod, which is arranged along the first direction at the axis of the installation pipe.

[0013] A connecting spring, which is sleeved outside the installation sleeve rod.

[0014] The first closing piece and the second closing piece are movably sleeved outside the installation sleeve rod and are connected by the connecting spring.

[0015] Optionally, the filter further includes:

[0016] The first dust scraping claw and the second dust scraping claw are respectively arranged at the edges of the first positioning ring and the second positioning ring, and are respectively in movable contact with the outer wall surfaces of the first filter screen and the second filter screen.

[0017] A rotation driving mechanism, which is connected to at least one of the first filter screen and the second filter screen and is used to drive the first filter screen and the second filter screen to rotate around the installation sleeve rod.

[0018] Optionally, the rotation driving mechanism includes:

[0019] A linkage frame, which is fixed at the opening of the first filter screen,

[0020] A driving sleeve rod, which is sleeved outside the installation sleeve rod and has a first end and a second end arranged opposite to each other. The first end is fixed on the linkage frame.

[0021] A fixing plate, which is fixedly installed on the inner pipe wall of the installation pipe.

[0022] A driving wheel and a driven wheel, which are meshed with each other and are located on the side of the fixing plate close to the driving sleeve rod. The driven wheel is fixedly connected to the second end of the driving sleeve rod.

[0023] A driving motor, which is fixed on the fixing plate and the output shaft of which is connected to the axis of the driving wheel.

[0024] Optionally, the number of the filtering mechanisms is multiple, and the multiple filtering mechanisms are distributed along the first direction.

[0025] The number of backwash inlets is multiple and is provided in one-to-one correspondence with multiple filtering mechanisms.

[0026] Optionally, the number of filtering mechanisms is two;

[0027] The filter further includes:

[0028] The first collection pipe is arranged around inside the installation pipe, located between the first filtering component and the second filtering component. The first collection pipe has first collection holes, and both ends of the first collection pipe penetrate through the installation pipe for connection with an external filter tank.

[0029] The second collection pipe is arranged around inside the installation pipe, located inside the second filter screen. The second collection pipe has second collection holes, and at least one end of the second collection pipe penetrates through the installation pipe for connection with an external filter tank.

[0030] Wherein, the first collection pipe and the second collection pipe form a backwash outlet at a partial penetration position of the installation pipe.

[0031] This application also provides a flushing and filtering device for an air-conditioning water system, including:

[0032] An installation box, inside which the above-mentioned filter is provided.

[0033] A water inlet pipe, which is communicated with the water inlet of the filter and is used for connection with an external air-conditioning water supply pipe.

[0034] A connecting conduit, which is communicated with the water outlet of the filter.

[0035] A water storage tank, which is located above the installation box and is communicated with one end of the connecting conduit far away from the filter.

[0036] A receiving pipe and a backwash pipeline. The backwash pipeline is communicated with the water storage tank through the receiving pipe. The backwash pipeline has a backwash airbag communicated with the backwash inlet of the filter.

[0037] A drain pipe, which is communicated with the backwash pipeline and is used for connection with an external air-conditioning water return pipe.

[0038] Wherein, driving pumps are arranged in the water inlet pipe, the drain pipe and the connecting conduit. Electric control valves are arranged inside the receiving pipe, the water inlet pipe, the drain pipe and the connecting conduit. A one-way driving water pump is arranged inside the receiving pipe.

[0039] Optionally, it further includes:

[0040] A filter tank, which is communicated with the backwash outlet of the filter and can return the filtered liquid to the filter. The filter tank includes a reserved frame arranged outside and a filter element inside. The filter element can be taken out movably from the reserved frame.

[0041] Optionally, the number of filtering mechanisms is 2.

[0042] The air-conditioning water system flushing and filtering device further includes:

[0043] A spiral coil pipe, which is fixed inside the installation pipe and sleeved on the outer edge of the filter and arranged in the first direction.

[0044] An upper connecting pipe and a lower connecting pipe, which are respectively connected to one end of the spiral coil pipe. The other opposite ends of the upper connecting pipe and the lower connecting pipe respectively extend out of the installation box and are connected to both sides of the filtering box.

[0045] A connecting branch pipe, which penetrates through the installation pipe and the installation box and is communicated with the inner edge of the spiral coil pipe.

[0046] Wherein, the filter includes a first collecting pipe and a second collecting pipe. Both ends of the first collecting pipe penetrate through the installation pipe and the installation box and extend into the filtering box.

[0047] The second collecting pipe is communicated with the end of the connecting branch pipe far away from the spiral coil pipe.

[0048] Optionally, the filtering box has two independent filtering chambers. A two-way water pump is included in the filtering chamber.

[0049] The filtering mechanisms are arranged in one-to-one correspondence with the filtering chambers. Wherein, the first collecting pipe and the second collecting pipe corresponding to one filtering mechanism are communicated with the two-way water pump of one filtering chamber.

[0050] The number of the spiral coil pipes is 2, and the spiral coil pipes are arranged in one-to-one correspondence with the filtering mechanisms.

[0051] Or, the number of the spiral coil pipes is 1. A barrier sheet is arranged inside the spiral coil pipe to form two independent flow channels, and the flow channels are arranged in one-to-one correspondence with the filtering mechanisms.

[0052] For the above-mentioned filter, the water inlet and the backwash inlet are arranged oppositely along the axial direction of the installation pipe. The first filter screen and the second filter screen are respectively provided with corresponding positioning rings on the far side of the other positioning ring, and the first closing piece and the second closing piece are connected. In this way, the water entering the filter enters from the water inlet, and the second positioning ring limits the second filter screen and the first filter screen. The water flows through the second filter screen and the first filter screen in sequence for filtration, and impurities stay on the outer wall surfaces of the second filter screen and the first filter screen. During this process, the second positioning ring limits the second filter screen and the first filter screen. During backwashing, the backwash water enters from the backwash inlet, and the flow direction is from the first filter screen to the second filter screen. The first positioning ring limits the first filter screen and the second filter screen. This process causes the first closing piece and the second closing piece to deform. During the deformation process of the first closing piece and the second closing piece, a thrust is generated on the water body located between the first filter screen and the second filter screen, so that the impurities adsorbed near the surfaces of the first filter screen and the second filter screen fall off and dissolve into the water body, and are discharged from the backwash outlet. Through the above backwashing operation, the filtering capacity of the first filter screen and the second filter screen can be restored regularly without disassembly and cleaning. Brief Description of the Drawings

[0053] The features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0054] Figure 1 It is a schematic structural diagram of a flushing and filtering device for an air-conditioning water system proposed by the present invention;

[0055] Figure 2 In a flushing and filtering device for an air-conditioning water system proposed by the present invention Figure 1 It is a schematic structural diagram when it turns 180 degrees;

[0056] Figure 3 It is a partial structural schematic diagram of a flushing and filtering device for an air-conditioning water system proposed by the present invention Figure 1 ;

[0057] Figure 4 It is a partial structural schematic diagram of a flushing and filtering device for an air-conditioning water system proposed by the present invention Figure 2 ;

[0058] Figure 5 It is a partial structural schematic diagram of a flushing and filtering device for an air-conditioning water system proposed by the present invention Figure 3 ;

[0059] Figure 6 It is a partial structural schematic diagram of a flushing and filtering device for an air-conditioning water system proposed by the present invention Figure 4 ;

[0060] Figure 7 It is a partial structural schematic diagram of a flushing and filtering device for an air-conditioning water system proposed by the present invention Figure 5 ;

[0061] Figure 8 Partial structural schematic diagram of a flushing and filtering device for an air-conditioning water system proposed by the present invention Figure 6 。 Description of the drawings:

[0063] 1. Installation box; 2. Filter box; 201. Reserved frame; 202. Filter element; 3. Water storage tank; 301. Mounting seat; 302. Connecting pipe; 4. Water inlet pipe; 5. Drain pipe; 6. Backwashing pipeline; 7. Connecting conduit; 8. Filter; 81. Installation pipe; 801. Backwashing airbag; 802. Sliding piston; 803. Accommodating pipe; 804. First collecting pipe; 805. Installation rod; 8051. Installation frame; 806. First collecting hole; 807. First filtering component; 8071. First filter screen; 8072. First positioning ring; 8073. First closing piece; 8074. First dust scraping claw; 808. Second filtering component; 8081. Second filter screen; 8082. Second positioning ring; 8083. Second closing piece; 8084. Second dust scraping claw; 809. Connecting spring; 810. Fixed plate; 811. Driving motor; 812. Driving sleeve rod; 813. Linkage frame; 9. Spiral coil; 901. Installation ring; 902. Upper connecting pipe; 903. Lower connecting pipe; 904. Second collecting pipe; 905. Connecting branch pipe; 906. Annular conduit; 907. Second collecting hole. Detailed implementation manners

[0064] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0065] The present application provides a filter 8, see Figures 4 to 8 , including an installation pipe 81 and a filtering mechanism. The installation pipe 81 has a water inlet, a backwashing inlet and a backwashing outlet. The water inlet and the backwashing inlet are arranged opposite to each other along a first direction, and the first direction is the axial direction of the installation pipe 81. The setting directions of the water inlet and the backwashing inlet are opposite, that is, they are opposite with respect to the water flow direction in the installation pipe 81. The backwashing inlet is close to the water outlet side of the installation pipe 81. The backwashing inlet can be arranged on the pipe wall of the installation pipe 81. In some embodiments, the backwashing inlet can also share an opening with the water outlet. In some embodiments, the backwashing inlet can also be composed of a pipe, that is, it is connected to the installation pipe 81 through a pipe to allow the backwashing water and impurities to flow out of the installation pipe 81.

[0066] At least one filtering mechanism (such as one, two or more) is arranged in the installation pipe 81, on the side close to the water inlet of the backwash inlet. In this way, when the water filled in the backwash inlet or the power provided by the backwash inlet causes the water in the installation pipe 81 to act on the filtering mechanism, the flow direction of the water is opposite to the flow direction of the water during filtration, thereby forming a backwash.

[0067] The filtering mechanism includes a first filtering component 807 and a second filtering component 808. The first filtering component 807 includes a first positioning ring 8072, a first filter screen 8071 and a first closing piece 8073; the second filtering component 808 includes a second positioning ring 8082, a second filter screen 8081 and a second closing piece 8083.

[0068] The first positioning ring 8072 and the second positioning ring 8082 are arranged along the first direction and are respectively fixed to the inner pipe wall of the installation pipe 81, and the facing directions of the first positioning ring 8072 and the second positioning ring 8082 are opposite. The first positioning ring 8072 is close to the backwash inlet.

[0069] The structures of the first positioning ring 8072 and the second positioning ring 8082 may be the same. For example, both are annular structures with a certain taper. The setting directions of the first positioning ring 8072 and the second positioning ring 8082 are opposite. For example, the opening with a smaller diameter of the first positioning ring 8072 faces the water inlet direction, and the opening with a smaller diameter of the second positioning ring 8082 faces the backwash inlet direction.

[0070] Both the first filter screen 8071 and the second filter screen 8081 have many filter holes. The first filter screen 8071 and the second filter screen 8081 are respectively movably arranged in the first positioning ring 8072 and the second positioning ring 8082. The first filter screen 8071 can be a curved filter screen. For example, the shape and size of the first filter screen 8071 respectively match the shape and size of the first positioning ring 8072, and for example, it is also an annular structure with a certain taper. Similarly, the structure of the second filter screen 8081 and its relationship with the second positioning ring 8082 are similar and will not be elaborated.

[0071] The first filter screen 8071 and the second filter screen 8081 are respectively prevented from moving along their facing directions across the positioning rings where they are located. That is, the first positioning ring 8072 has a certain limiting effect on the first filter screen 8071. For example, the maximum diameter of the first filter screen 8071 is greater than the diameter of the opening with a larger diameter of the first positioning ring 8072. The first filter screen 8071 can move relative to the first positioning ring 8072 along the first direction on the side away from the water inlet. When its opening position contacts the first positioning ring 8072, it cannot continue to move in the first direction. Similarly, the second positioning ring 8082 has a similar limiting effect on the second filter screen 8081 and will not be elaborated.

[0072] The first closing piece 8073 and the second closing piece 8083 are connected to each other, and are respectively fixedly arranged at the bottom of the first filter screen 8071 and the bottom of the second filter screen 8081. The materials of the first closing piece 8073 and the second closing piece 8083 are elastic materials. For example, they are made of rubber materials. The thickness of the first closing piece 8073 and the second closing piece 8083 can be 5 mm to close the first filter screen 8071 and the second filter screen 8081.

[0073] For the above-mentioned filter 8, the water inlet and the backwash inlet are arranged opposite to each other along the axial direction of the installation pipe 81. The first filter screen 8071 and the second filter screen 8081 are respectively provided with corresponding positioning rings on the far side of the other positioning ring, and the first closing piece 8073 and the second closing piece 8083 are connected to each other. In this way, the water entering the filter 8 enters from the water inlet, and the second positioning ring 8082 limits the second filter screen 8081 and the first filter screen 8071. The water flows through the second filter screen 8081 and the first filter screen 8071 in sequence for filtration, and the impurities stay on the outer wall surfaces of the second filter screen 8081 and the first filter screen 8071. During this process, the second positioning ring 8082 limits the second filter screen 8081 and the first filter screen 8071. During backwashing, the backwashing water enters from the backwash inlet, and the flow direction is from the first filter screen 8071 to the second filter screen 8081. The first positioning ring 8072 limits the first filter screen 8071 and the second filter screen 8081. This process also causes the first closing piece 8073 and the second closing piece 8083 to deform. During the deformation process of the first closing piece 8073 and the second closing piece 8083, a thrust is generated on the water body located between the first filter screen 8071 and the second filter screen 8081, so that the impurities adsorbed near the surfaces of the first filter screen 8071 and the second filter screen 8081 fall off and dissolve into the water body and are discharged from the backwash outlet. Through the above backwashing operation, the filtering capabilities of the first filter screen 8071 and the second filter screen 8081 can be periodically restored without disassembly and cleaning.

[0074] In some embodiments, referring to Figures 6 to 7 , the filter 8 further includes an installation sleeve rod and a connecting spring 809. The installation sleeve rod is arranged along the first direction at the axis of the installation pipe 81. For example, both ends of the installation rod 805 are connected to the two ends of the installation pipe 81 through installation brackets 8051.

[0075] The connecting spring 809 is sleeved outside the installation sleeve rod. The first closing piece 8073 and the second closing piece 8083 are movably sleeved outside the installation sleeve rod and are connected through the connecting spring 809. For example, sliding sleeves are fixedly connected to the centers of the first closing piece 8073 and the second closing piece 8083, and the sliding sleeves are movably connected to the installation rod 805.

[0076] In the same filtering mechanism, the sliding sleeves in the center of the adjacent first closing piece 8073 and the second closing piece 8083 are connected by a connecting spring 809, and the spring is in a certain compression state to support the first closing piece 8073 and the second closing piece 8083 to prevent the closing circle from shifting due to water flow, and also to ensure that the water flows from the water inlet to the water outlet during filtration (for the convenience of description, it is called flow from right to left). At the same time, during backwashing, it is ensured that the water flows from the backwash inlet to the water inlet (for the convenience of description, it is called flow from left to right).

[0077] In some embodiments, see Figures 6 to 7 The filter 8 further includes a first scraping claw 8074, a second scraping claw 8084 and a rotation drive mechanism. The first scraping claw 8074 and the second scraping claw 8084 are respectively arranged at the edges of the first positioning ring 8072 and the second positioning ring 8082, and are respectively in active contact with the outer wall surfaces of the first filter screen 8071 and the second filter screen 8081. The rotation drive mechanism is connected to at least one of the first filter screen 8071 and the second filter screen 8081, and is used to drive the first filter screen 8071 and the second filter screen 8081 to rotate around the mounting sleeve rod.

[0078] The rotary drive mechanism can be a manual drive mechanism or an electric drive mechanism. Exemplarily, the rotary drive mechanism is connected to the first filter screen 8071 to drive the first filter screen 8071 to rotate. The first filter screen 8071 drives the second filter screen 8081 to rotate through the first closing plate 8073, the sliding sleeve, the connecting spring 809 and the second closing plate 8083. The first scraping claw 8074 and the second scraping claw 8084 are fixed. Therefore, when the first filter screen 8071 and the second filter screen 8081 rotate, the impurities adsorbed on the surfaces of the two can fall off and dissolve between the first filter screen 8071 and the second filter screen 8081 under the action of the first scraping claw 8074 and the second scraping claw 8084, and dissolve in the water body on the side of the filter mechanism close to the water inlet (such as the water body between the two first filter mechanisms), which is conducive to improving the efficiency of the backwashing operation, so as to facilitate the subsequent impurity removal treatment of this part of the water body.

[0079] In some embodiments, see Figures 6 to 7 The rotary drive mechanism includes a linkage frame 813, a driving sleeve rod 812, a fixed plate 810, a driving wheel, a driven wheel and a driving motor 811. The linkage frame 813 is fixed at the opening of the first filter screen 8071. The driving sleeve rod 812 is sleeved outside the mounting sleeve rod, and has a first end and a second end that are relatively arranged, and the first end is fixed on the linkage frame 813. The fixed plate 810 is fixedly mounted on the inner tube wall of the mounting tube 81. The driving wheel and the driven wheel are meshed with each other and are located on the side of the fixed plate 810 close to the driving sleeve rod 812, and the driven wheel is fixedly connected to the second end of the driving sleeve rod 812. The driving motor 811 is fixed to the fixed plate 810, and the output shaft is connected to the axis of the driving wheel.

[0080] A linkage frame 813 is fixedly connected to the opening of the first filter screen 8071. On one side of the center of the linkage frame 813, a driving sleeve rod 812 is fixedly connected. The end of the driving sleeve rod 812 is fixedly connected to one side of a driven wheel, and the axis of the driven wheel is installed on a fixing plate 810. The fixing plate 810 is fixedly installed on the inner wall of the filter 8. One side of the driven wheel is meshed with a driving wheel, the axis of the driving wheel passes through the fixing plate 810 and is fixedly connected to the output shaft of a driving motor 811, and the driving motor 811 is fixedly connected to the fixing plate 810. The driving motor 811 is relatively small in volume, which is beneficial to the miniaturization of the filter 8 and improves the automation degree of the filter 8.

[0081] In some embodiments, referring to Figures 4 to 5 , the number of the filtering mechanisms is multiple, and the multiple filtering mechanisms are distributed along a first direction. The number of the backwashing inlets is multiple and is correspondingly arranged with the multiple filtering mechanisms one by one. That is, there is a situation where the backwashing inlet is located between two adjacent filtering mechanisms.

[0082] In some embodiments, referring to Figures 4 to 8 , the number of the filtering mechanisms is two. The filter 8 further includes a first collecting pipe 804 and a second collecting pipe 904. In one filtering mechanism, the first collecting pipe 804 is disposed around the installation pipe 81 and is located between the first filtering assembly 807 and the second filtering assembly 808. The first collecting pipe 804 has a first collecting hole 806, and both ends of the first collecting pipe 804 penetrate through the installation pipe 81 for connecting to an external filtering tank 2. The first collecting pipe 804 conveys the water body containing the exfoliated impurities between the first filtering assembly 807 and the second filtering assembly 808 out of the installation pipe 81 and into the filtering tank 2 for filtering.

[0083] The second collecting pipe 904 is disposed around the installation pipe 81 and is located inside the second filter screen 8081. The second collecting pipe 904 has a second collecting hole 907, and at least one end of the second collecting pipe 904 penetrates through the installation pipe 81 for connecting to an external filtering tank 2. For example, through a connecting branch pipe 905 penetrating through the installation pipe 81 and the installation box 1 and communicating with the inner edge of the spiral coil pipe 9. The other end forms an annular conduit 906 located inside the second filter screen 8081. The second collecting hole 907 can be disposed on the annular conduit 906.

[0084] Wherein, the first collecting pipe 804 and the second collecting pipe 904 form a backwashing outlet at a partial penetration position of the installation pipe 81.

[0085] Exemplarily, the second collecting pipe 904 directly conveys the water body containing the exfoliated impurities at the corresponding filter screen to the outside of the installation pipe 81 and into the filtering tank 2 for filtering.

[0086] Exemplarily, the second collection pipe 904 conveys the water body containing the shed impurities at the corresponding filter screen to other pipes, such as the spiral coiled pipe 9. The water body is conveyed outside the installation pipe 81 through the spiral coiled pipe 9 and enters the filter box 2 for filtration.

[0087] This application also provides a flushing and filtering device for an air-conditioning water system. Refer to Figures 1 to 3 , which includes an installation box 1, a water inlet pipe 4, a connecting conduit 7, a water storage tank 3, a receiving pipe 302, a backwashing pipe 6, and a drain pipe 5. A filter 8 as described above is provided inside the installation box 1. The water inlet pipe 4 communicates with the water inlet of the filter 8 and is used to communicate with an external air-conditioning water supply pipe. The connecting conduit 7 communicates with the water outlet of the filter 8. The water storage tank 3 is located above the installation box 1 and communicates with one end of the connecting conduit 7 away from the filter 8. The backwashing pipe 6 communicates with the water storage tank 3 through the receiving pipe 302, and the backwashing pipe 6 has a backwashing airbag 801 that communicates with the backwashing inlet of the filter 8. The drain pipe 5 communicates with the backwashing pipe 6 and is used to communicate with an external air-conditioning water return pipe. Among them, driving pumps are provided in the water inlet pipe 4, the drain pipe 5, and the connecting conduit 7, electric control valves are provided inside the receiving pipe 302, the water inlet pipe 4, the drain pipe 5, and the connecting conduit 7, and a one-way driving water pump is provided inside the receiving pipe 302.

[0088] Specifically, a filter 8 is provided inside the installation box 1. The left and right ends of the filter 8 are respectively connected to the water inlet pipe 4 and the connecting conduit 7. One end of the upper side of the installation box 1 is fixedly connected to an installation seat 301, the upper end of the installation seat 301 is fixedly connected to the water storage tank 3, and the end of the connecting conduit 7 penetrates through the top of the water storage tank 3. The lower side of the water storage tank 3 is fixedly connected to the backwashing pipe 6 through the receiving pipe 302. The lower side of the backwashing pipe 6 is fixedly connected to accommodating pipes 803 at both ends. The lower ends of the accommodating pipes 803 are sequentially connected to the installation box 1 and the filter 8. The lower ends of the accommodating pipes 803 are fixedly connected to backwashing airbags 801. In some embodiments, a sliding piston 802 is slidably and sealingly connected inside the accommodating pipe 803, and a limiting ring is provided on the inner wall of the top end of the accommodating pipe 803 to limit the sliding piston 802 from sliding out.

[0089] In the present invention, by providing a filter 8, when flushing the air-conditioning water system, the water inlet pipe 4 and the drain pipe 5 are respectively connected to the air-conditioning water supply pipe and the air-conditioning water return pipe first, so that the water discharged from the air-conditioning water system enters the water inlet pipe 4 through the air-conditioning water supply pipe, and then enters the filter 8. Under the action of the unidirectional driving water pump, the water flow flows along the filter 8. Under the combined action of the first filter assembly 807 and the second filter assembly 808, the water body is filtered. The purified water body is discharged from the other end of the filter 8 and enters the water storage tank 3 through the connecting conduit 7. During the water storage process, the electric control valve in the receiving pipe 302 is in a closed state, so that the water in the water storage tank 3 cannot enter the backwashing pipeline 6, so as to facilitate the subsequent backwashing operation; then, by opening the electric control valve in the drain pipe 5 and the unidirectional driving water pump, the water flow in the backwashing pipeline 6 is discharged and re-introduced into the air-conditioning water system through the air-conditioning water return pipe; as the water flow in the backwashing pipeline 6 is discharged, the sliding piston 802 is jacked up under the action of air pressure, so that the backwashing airbag 801 returns to its original state.

[0090] In some embodiments, referring to Figure 3 , the connection between the drain pipe 5 and the backwashing pipeline 6 can be set in a shape of a downwardly concave flow collector, and a jacking spring is arranged between the backwashing airbag 801 and the sliding piston 802, so that the water flow in the backwashing pipeline 6 can enter the drain pipe 5 more smoothly.

[0091] In some embodiments, referring to Figures 1 to 3 , the air-conditioning water system flushing and filtering device further includes a filter box 2. The filter box 2 is communicated with the backwashing outlet of the filter 8 and can return the filtered liquid to the filter 8. The filter box 2 includes a reserved frame 201 arranged outside and a filter element 202 inside, and the filter element 202 can be movably taken out from the reserved frame 201.

[0092] When the water storage volume in the water storage tank 3 reaches the requirement, the electric control valve and the unidirectional driving water pump in the connecting pipe 302 are opened, so that the water in the water storage tank 3 quickly enters the backwashing pipeline 6. As the water flows in, the sliding piston 802 moves downward under the action of the water pressure. During the downward movement of the sliding piston 802, the air flow below it squeezes the backwashing airbag 801, causing the backwashing airbag 801 to expand and deform in the water body of the filter 8, thereby generating a reverse driving force on the water body in the filter 8. The driving force at this time can cause the water body to drive the first closing piece 8073 connected to the first filter screen 8071 to deform against the water flow direction, and push the adjacent second closing piece 8083 to deform through the sliding sleeve and the connecting spring 809 in the middle thereof. During the deformation process of the first closing piece 8073 and the second closing piece 8083, a thrust is generated on the water body located between the first filter screen 8071 and the second filter screen 8081, so that the impurities adsorbed near the surfaces of the first filter screen 8071 and the second filter screen 8081 fall off and dissolve into the water body. The above process is a complete backwashing operation.

[0093] A filter element 202 is arranged inside the filter box 2. The water body with the shed impurities in the filter 8 is absorbed and processed by the filter element 202 and then discharged into the filter 8, so that the cleanliness of the recycled water body is higher.

[0094] The filter element 202 is provided with replaceable filter cotton, and the filter element 202 can be movably taken out from the reserved frame 201. In some embodiments, a visualization window or a filter cotton cleanliness monitoring status display screen can be arranged on one side of the filter box 2 to observe or monitor the cleanliness of the filter cotton. When it is visually observed that there are more impurities in the filter cotton and the color changes significantly, the filter cotton should be replaced in time to maintain the efficient filtering operation of the device.

[0095] In some embodiments, referring to Figures 1 to 3 , the air-conditioning water system flushing and filtering device further includes a spiral coil 9, an upper connecting pipe 902 and a lower connecting pipe 903. The spiral coil 9 is fixed in the installation box 1 and is arranged along the first direction outside the filter 8. The upper connecting pipe 902 and the lower connecting pipe 903 are respectively communicated with one end of the spiral coil 9, and the other opposite ends of the upper connecting pipe 902 and the lower connecting pipe 903 respectively extend out of the installation box 1 and are connected to both sides of the filter box 2. Among them, the filter 8 includes a first collecting pipe 804 and a second collecting pipe 904, and both ends of the first collecting pipe 804 penetrate through the installation pipe 81 and the installation box 1 and extend into the filter box 2.

[0096] Specifically, referring to Figures 4 to 6, a spiral coil pipe 9 is sleeved outside the filter 8, and the periphery of the spiral coil pipe 9 is fixedly connected to the installation box 1 through an installation ring 901; the front and rear ends of the spiral coil pipe 9 are respectively fixedly connected with an upper connecting pipe 902 and a lower connecting pipe 903, and the upper connecting pipe 902 and the lower connecting pipe 903 are respectively fixedly installed at the front and rear ends of the installation box 1; the upper connecting pipe 902 and the lower connecting pipe 903 extend out of the installation box 1 and are connected to both sides of the filter box 2, and the filter box 2 is installed on one side outside the installation box 1.

[0097] By arranging a first collecting pipe 804 and a second collecting pipe 904 in the installation pipe 81, during the backwashing operation, the driving pump and the electric control valve in the water inlet pipe 4, and the electric control valve in the connecting conduit 7 should be closed to suspend the filtering operation. As the backwashing operation progresses, the intercepted deposited impurities are separated from the surfaces of the first filter screen 8071 and the second filter screen 8081 and dissolve into the water. The water body containing the shed impurities is recovered through the cooperation of the first collecting pipe 804 and the second collecting pipe 904 with the two-way water pump in the filtering chamber, and after being absorbed and treated by the filter cotton in the filter element 202, it is discharged into the filter 8, making the recycled water body cleaner.

[0098] In some embodiments, sampling ports can be arranged at the corresponding positions at the front and rear ends of the spiral coil pipe 9 to facilitate the detection of the water quality at different positions inside the filter 8, so as to judge the water quality purification degree at each stage. When the water quality is visually clear and there are no visible precipitates to the naked eye, the backwashing operation can be stopped. The present invention can manually start the backwashing operation by observing the filtered water quality, or can cooperate with the electric control system to start the backwashing operation regularly.

[0099] In some embodiments, refer to Figure 3 and 8 , the number of the filtering mechanisms is multiple, and the filter box 2 has multiple independent filtering chambers. The filtering chamber includes a two-way water pump. The filtering mechanisms are arranged in one-to-one correspondence with the filtering chambers. Among them, the first collecting pipe 804 and the second collecting pipe 904 corresponding to one filtering mechanism are communicated with the two-way water pump of one filtering chamber. The number of the spiral coil pipes 9 is multiple, and the spiral coil pipes 9 are arranged in one-to-one correspondence with the filtering mechanisms, or the number of the spiral coil pipes 9 is 1, and a barrier sheet is arranged inside the spiral coil pipe 9 to form multiple independent flow channels, and the flow channels are arranged in one-to-one correspondence with the filtering mechanisms.

[0100] The extending ends of the same group of the first collecting pipe 804 and the second collecting pipe 904 correspond to the same filtering chamber inside the filter box 2. The filter elements 202 are evenly distributed in the filtering chamber. Different filtering chambers are independent and closed. A barrier sheet is arranged in the center of the spiral coil pipe 9 to separate the water bodies flowing through the two groups of the second collecting pipes 904; a two-way water pump is arranged in the filtering chamber, and both ends of the two-way water pump are respectively connected to the end of the first collecting pipe 804 and the end of the upper connecting pipe 902 or the lower connecting pipe 903.

[0101] The embodiments described above merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A filter, characterized in that, it comprises: a mounting pipe having a water inlet, a backwash inlet and a backwash outlet, wherein the water inlet and the backwash inlet are oppositely arranged along a first direction which is the axial direction of the mounting pipe; at least one filtering mechanism arranged inside the mounting pipe, on the side of the backwash inlet close to the water inlet, the filtering mechanism comprising a first filtering component and a second filtering component, the first filtering component comprising a first positioning ring, a first filter screen and a first closing piece; the second filtering component comprising a second positioning ring, a second filter screen and a second closing piece; the first positioning ring and the second positioning ring are arranged along the first direction and are respectively fixed to the inner pipe wall of the mounting pipe, and the facing directions of the first positioning ring and the second positioning ring are opposite; both the first positioning ring and the second positioning ring are annular structures with a taper; the first positioning ring is close to the backwash inlet; the first filter screen and the second filter screen are respectively movably arranged inside the first positioning ring and the second positioning ring and are respectively prevented from moving across the corresponding positioning ring along its facing direction; both the first filter screen and the second filter screen are annular structures with a taper; the bottoms of the first filter screen and the second filter screen are respectively the sides with a smaller diameter in the corresponding annular structures; the first closing piece and the second closing piece are connected to each other and are respectively fixedly arranged at the bottoms of the first filter screen and the second filter screen; the material of the first closing piece and the material of the second closing piece are elastic materials.

2. The filter according to claim 1, characterized in that, the filter further comprises: a mounting sleeve rod arranged along the first direction at the axis of the mounting pipe; a connecting spring sleeved outside the mounting sleeve rod; the first closing piece and the second closing piece are movably sleeved outside the mounting sleeve rod and are connected by the connecting spring.

3. The filter according to claim 2, characterized in that, the filter further comprises: a first dust scraping claw and a second dust scraping claw respectively arranged at the edges of the first positioning ring and the second positioning ring and respectively in movable contact with the outer wall surfaces of the first filter screen and the second filter screen; a rotation driving mechanism connected to at least one of the first filter screen and the second filter screen for driving the first filter screen and the second filter screen to rotate around the mounting sleeve rod.

4. The filter according to claim 3, characterized in that, the rotation driving mechanism comprises: a linkage frame fixed at the opening of the first filter screen, a driving sleeve rod sleeved outside the mounting sleeve rod and having a first end and a second end arranged oppositely, the first end being fixed on the linkage frame; a fixing plate fixedly installed on the inner pipe wall of the mounting pipe; a driving wheel and a driven wheel which are meshed with each other and are located on the side of the fixing plate close to the driving sleeve rod, the driven wheel being fixedly connected to the second end of the driving sleeve rod; a driving motor fixed to the fixing plate and the output shaft of which is connected to the axis of the driving wheel.

5. The filter according to claim 1, characterized in that, The number of the filtering mechanisms is multiple, and the multiple filtering mechanisms are distributed along the first direction; The number of the backwashing inlets is multiple, and they are arranged in one-to-one correspondence with the multiple filtering mechanisms.

6. The filter according to claim 1, characterized in that the number of the filtering mechanisms is two; The filter further includes: A first collection pipe, which is disposed around the installation pipe and located between the first filtering component and the second filtering component. The first collection pipe has first collection holes, and both ends of the first collection pipe penetrate through the installation pipe for connection with an external filtering box; A second collection pipe, which is disposed around the installation pipe and located inside the second filter screen. The second collection pipe has second collection holes, and at least one end of the second collection pipe penetrates through the installation pipe for connection with an external filtering box; Wherein, the first collection pipe and the second collection pipe form the backwashing outlet at a partial penetration position of the installation pipe.

7. A flushing and filtering device for an air-conditioning water system, characterized in that it includes: An installation box, which is internally provided with the filter according to any one of claims 1 to 6; A water inlet pipe, which is communicated with the water inlet of the filter for connection with an external air-conditioning water supply pipe; A connecting conduit, which is communicated with the water outlet of the filter; A water storage tank, which is located above the installation box and is communicated with one end of the connecting conduit far away from the filter; A receiving pipe and a backwashing pipeline, the backwashing pipeline is communicated with the water storage tank through the receiving pipe, and the backwashing pipeline has a backwashing airbag communicated with the backwashing inlet of the filter; A drain pipe, which is communicated with the backwashing pipeline for connection with an external air-conditioning water return pipe; Wherein, driving pumps are arranged in the water inlet pipe, the drain pipe and the connecting conduit, electric control valves are arranged inside the receiving pipe, the water inlet pipe, the drain pipe and the connecting conduit, and a one-way driving water pump is arranged inside the receiving pipe.

8. The flushing and filtering device for an air-conditioning water system according to claim 7, characterized in that it further includes: A filtering box, which is communicated with the backwashing outlet of the filter and can return the filtered liquid to the filter; The filtering box includes a reserved frame arranged outside and a filter core inside, and the filter core can be taken out of the reserved frame movably.

9. The flushing and filtering device for an air-conditioning water system according to claim 7, characterized in that the number of the filtering mechanisms is 2; The flushing and filtering device for an air-conditioning water system further includes: A spiral coil pipe, which is fixed inside the installation box and sleeved outside the filter and arranged along the first direction; An upper connecting pipe and a lower connecting pipe, which are respectively communicated with one end of the spiral coil pipe, and the other opposite ends of the upper connecting pipe and the lower connecting pipe respectively extend out of the installation box and are connected to both sides of the filtering box; A connecting branch pipe, which penetrates through the installation pipe and the installation box and is communicated with the inner edge of the spiral coil pipe; Wherein, the filter includes a first collection pipe and a second collection pipe, and both ends of the first collection pipe penetrate through the installation pipe and the installation box and extend into the filtering box. The second collecting pipe communicates with the end of the connecting branch pipe far from the spiral coil pipe.

10. The air-conditioning water system flushing and filtering device according to claim 9, characterized in that the filter box has two independent filter chambers; a two-way water pump is included in the filter chamber; the filtering mechanisms are arranged in one-to-one correspondence with the filter chambers, wherein the first collecting pipe and the second collecting pipe corresponding to one of the filtering mechanisms communicate with the two-way water pump of one of the filter chambers; the number of the spiral coil pipes is 2, and the spiral coil pipes are arranged in one-to-one correspondence with the filtering mechanisms, or; the number of the spiral coil pipes is 1, a barrier sheet is arranged in the spiral coil pipe to form two independent flow channels, and the flow channels are arranged in one-to-one correspondence with the filtering mechanisms.

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