Pre-filter and water heater

Abstract

The invention discloses a pre-filter and a water heater, the pre-filter comprises a mounting main body, the mounting main body is provided with a water inlet connecting pipe, a water outlet connecting pipe and a pollution discharge connecting pipe; the mounting main body is provided with an open mounting cavity, the open end part of the mounting cavity is provided with a first connecting port, and a second connecting port is further formed in the mounting cavity and located on the inner side of the first connecting port; the filter element comprises a shell and a filter screen, the shell is provided with an inlet and an outlet, and the filter screen covers the inlet; a filter bottle; the cleaning part is provided with a first water flow driving part and a first cleaning part; a first water flow connector, a second water flow connector and a third water flow connector are arranged on the water distributor; the cleaning part is rotatably arranged on the shell in a sleeving mode, and the first cleaning part is configured to rotate along with the cleaning part so as to scrape the filter screen on the shell. The filtering efficiency of the pre-filter is improved; and the service life is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of household appliances, and particularly relates to a pre-filter and a water heater. Background Art

[0002] At present, a water heater is a commonly used household appliance in people's daily life. During the use of the water heater, the water in the tap water pipe enters the water heater through the water inlet pipe and is heated, and then the hot water is output from the water outlet pipe.

[0003] During the use of the water heater, since there are sundries such as sand grains in the water supplied by the tap water pipe in the user's home, for this reason, a pre-filter is provided at the water inlet pipe of a conventional water heater, and the pre-filter is used to filter the water entering the water inlet pipe. Chinese Patent Publication No. CN203944183U discloses a pre-filter for a water heater and a water heater having the pre-filter. A filter screen is provided in the pre-filter to filter the incoming water flow, and at the same time, the filtered water enters the water inlet pipe of the water heater again.

[0004] However, in actual use, as the use time of the pre-filter extends, more dirt will adhere to the surface of the filter screen. On the one hand, it causes the filtration rate of the pre-filter to decrease, and on the other hand, it causes the service life of the filter to decrease. In view of this, how to design a technology to improve the filtration efficiency of the pre-filter and extend its service life is the technical problem to be solved by the present invention. Summary of the Invention

[0005] The present invention provides a pre-filter and a water heater, which can improve the filtration efficiency of the pre-filter and extend its service life.

[0006] To achieve the above technical purpose, the present invention is implemented by adopting the following technical solutions: In one aspect, the present invention provides a pre-filter, comprising: An installation main body, on which a water inlet connecting pipe, a water outlet connecting pipe and a sewage connecting pipe are provided; the installation main body is provided with an open installation cavity, an opening end of the installation cavity is provided with a first connection port, and a second connection port is further provided inside the installation cavity at the position of the first connection port; A filter element, the filter element includes a housing and a filter screen, the housing is provided with an inlet and an outlet, and the filter screen covers the inlet; A filter bottle; A cleaning component, the cleaning component is provided with a first water flow driving part and a first cleaning part; A water distributor, on which a first water flow interface, a second water flow interface and a third water flow interface are provided; Wherein, the water separator is disposed on the second connection port, the filter bottle is disposed on the first connection port and is hermetically connected to the water separator, a water outlet cavity is formed between the water separator and the inner wall of the installation main body, and a water inlet cavity is formed between the water separator and the filter bottle; the filter element and the cleaning component are disposed between the water separator and the filter bottle, and the cleaning component is rotatably sleeved on the housing; The water inlet connecting pipe communicates with the inlet through the first water flow interface, the water outlet connecting pipe communicates with the outlet through the second water flow interface, and the sewage connecting pipe communicates with the inner space of the filter bottle through the third water flow interface.

[0007] In another aspect, the present application further provides a water heater, the water heater is configured with a water inlet pipe and a water outlet pipe, and further includes the above-mentioned pre-filter, and the water outlet connecting pipe of the pre-filter is connected to the water inlet pipe.

[0008] By configuring a cleaning component on the filter element, the cleaning component is provided with a first water flow driving part and a first cleaning part, and the first water flow driving part can use the water flow flowing in the filter to drive the cleaning component to rotate on the filter element. Thus, when it is necessary to clean the surface of the filter element in the filter, the sewage connecting pipe is opened, and the water flow flowing into the filter is used to drive the cleaning component to rotate to clean the filter net of the filter element, reducing the reduction of the filter efficiency caused by the blockage of the filter net of the filter element by dirt, and achieving the improvement of the filter efficiency of the filter and the extension of the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0010] Figure 1 It is a schematic structural diagram of one embodiment of the water heater of the present invention; Figure 2 It is a schematic structural diagram of another embodiment of the water heater of the present invention; Figure 3 It is Figure 1 One of the schematic structural diagrams of the pre-filter in Figure 4 It is Figure 1 Another schematic structural diagram of the pre-filter in Figure 5 It is Figure 4 Another schematic structural diagram of the pre-filter in Figure 6 It isFigure 5 Cross-sectional view taken along line A-A in [object name]; Figure 7 is Figure 3 Exploded view of the pre-filter in [object name]; Figure 8 is Figure 7 Schematic structural diagram of the cleaning component in [object name]; Figure 9 is Figure 7 One of the schematic structural diagrams of the water distributor in [object name]; Figure 10 is Figure 7 Another schematic structural diagram of the water distributor in [object name].

[0011] Reference numerals: 100, water heater main body; 200, water inlet pipe; 300, water outlet pipe; 400, decorative cover; 500, pre-filter; 1, installation main body; 11, water inlet connecting pipe; 12, water outlet connecting pipe; 13, first connection port; 14, second connection port; 15, first installation component; 16, second installation component; 17, sewage discharge connecting pipe; 111, auxiliary flow channel; 153, auxiliary connecting pipe; 2, filter element; 21, housing; 24, filter net; 3, filter bottle; 4, intermediate pipe; 41, concave structure; 5, water distributor; 51, annular spacer; 54, insertion part; 55, first water flow interface; 56, third water flow interface; 57, second water flow interface; 551, diversion channel; 501, end plate part; 502, annular part; 503, support column; 6, cleaning component; 61, first water flow driving part; 62, first cleaning part; 63, first support part; 64, second water flow driving part; 65, second support part; 66, second cleaning part; 67, connecting rib; 7, valve assembly; 71, valve body; 72, rotating part; 73, driving handle; 74, passive gear structure; 75, active gear structure; 76, connecting part; 731, installation hole; 761, sewage discharge hole. Detailed implementation manners

[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0013] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0014] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0015] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0016] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0017] As Figure 1 and Figure 2 shown, the present application provides a device, which includes a water heater main body 100. The represented entity of the water heater main body 100 can be the water tank of an electric water heater, or a heat pump water heater, or a solar water heater.

[0018] When the water heater main body 100 is used in a user's home, it is installed on the wall of the user's home according to the installation requirements.

[0019] Among them, the water heater main body 100 is configured with a water inlet pipe 200 and a water outlet pipe 300. In order to improve the water inlet quality of the water heater, a pre-filter 500 can be added between the water inlet pipe 200 of the water heater and the water supply pipe in the user's home, so as to filter the water output from the water supply pipe through the pre-filter 500.

[0020] Embodiment 1, as Figures 3 - 8 shown, generally, the pre-filter includes an installation main body 1 and a filtering component. The filtering component includes a filter element 2 and a filter bottle 3. The installation main body 1 is used to meet the connection requirements between the water inlet pipe of the water heater and the water supply pipe in the user's home. At the same time, the installation main body 1 is also used to install the filter element 2 and the filter bottle 3 of the filtering component.

[0021] The filter bottle 3 and the filter element 2 are arranged on the installation main body 1. The filter bottle 3 covers the filter element 2. The water inlet connecting pipe 11 is communicated with the inlet, and the water outlet connecting pipe 12 is communicated with the outlet. Among them, an water inlet connecting pipe 11 and a water outlet connecting pipe 12 are arranged on the installation main body 1; the filter element 2 includes a housing 21 and a filter net 24. The housing 21 is provided with an inlet and an outlet, and the filter net 24 covers the inlet.

[0022] In addition, since the filter element 2 is installed between the installation main body 1 and the filter bottle 3, in order to meet the requirement of regularly cleaning the filter net 24 on the filter element 2, the pre-filter further includes a cleaning component 6. The cleaning component 6 is provided with a first water flow driving part 61 and a first cleaning part 62.

[0023] The cleaning component 6 is rotatably sleeved on the housing 21. The first water flow driving part 61 is configured to be driven by water flow to drive the cleaning component 6 to rotate on the housing 21. The first cleaning part 62 is configured to rotate following the cleaning component 6 to scrape the filter net 24 on the housing 21.

[0024] Correspondingly, in order to discharge the sewage formed by cleaning in time after cleaning the filter element 2 through the cleaning component 6, a sewage discharge connecting pipe 17 is further arranged on the installation main body 1. The sewage discharge connecting pipe 17 is communicated with the internal space of the filter bottle 3.

[0025] Specifically, during actual use, when the pre-filter is in normal filtering use, water enters the installation main body 1 through the water inlet connecting pipe 11 and flows into the filter bottle 3. The water is filtered by the filter screen on the housing 21 in the filter bottle 3 and flows into the housing 21 through the inlet on the housing 21 and finally is output from the outlet of the housing 21; the water output from the outlet of the filter element 2 will enter the water outlet connecting pipe 12 and be output and used in the water heater.

[0026] After long-term use, the surface of the filter screen will be covered with dirt such as sediment filtered out. In this way, the filtering ability of the filter screen will decline, resulting in a reduction in the filtering efficiency. At this time, the sewage connecting pipe 17 can be opened to clean the filter screen of the filter element 2 through the cleaning component 6.

[0027] Specifically, first open the sewage connecting pipe 17, and the water introduced by the water inlet connecting pipe 11 enables the water in the filter bottle 3 to be discharged through the sewage connecting pipe 17. During the flow of the water in the pre-filter, the water flow acts on the first water flow driving part 61 of the cleaning component 6, causing the first water flow driving part 61 to drive the cleaning component 6 to rotate. In this way, the dirt on the surface of the filter screen can be scraped by the first cleaning part 62 on the rotating cleaning component 6, so as to clean the dirt on the surface of the filter screen, and then restore the filtering ability of the filter screen, ensuring that the pre-filter can maintain a high filtering ability stably for a long time, thereby extending the overall service life of the pre-filter.

[0028] Among them, when the sewage connecting pipe 17 is in an open state, the water introduced from the water inlet connecting pipe 11 enters the installation main body 1, and at least part of the water flows from the installation main body 1 into the filter bottle 3 and drives the first water flow driving part 61 to drive the cleaning component 6 to rotate on the housing 21 to clean the filter net 24 through the first cleaning part 62, and the water flowing into the filter bottle 3 flows out through the surface of the housing 21 into the sewage connecting pipe 17.

[0029] Specifically, during use, when the sewage connecting pipe 17 is opened, the water introduced by the water inlet connecting pipe 11 will enter the filter bottle 3. In addition, there will also be part of the water flow introduced by the water inlet connecting pipe 11 directly discharged from the sewage connecting pipe 17 inside the installation main body 1 under the action of the water outlet of the sewage connecting pipe 17.

[0030] By arranging a cleaning component 6 on the filter element 2, the cleaning component 6 is provided with a first water flow driving part 61 and a first cleaning part 62. The first water flow driving part 61 can drive the cleaning component 6 to rotate on the filter element 2 by using the water flow flowing in the pre-filter. In this way, when it is necessary to clean the surface of the filter element 2 in the pre-filter, the sewage connection pipe 17 is opened, and the water flow flowing into the pre-filter is used to drive the cleaning component 6 to rotate to clean the filter screen 24 of the filter element 2, reducing the reduction of the filtration efficiency of the pre-filter caused by the blockage of the filter screen 24 of the filter element 2, and achieving the improvement of the filtration efficiency of the pre-filter and the extension of the service life.

[0031] In one embodiment, in order to ensure that the cleaning component 6 can rotate reliably on the housing 21 of the filter element 2, a first supporting part 63 is arranged at one end of the cleaning component 6, and the first supporting part 63 abuts against the outer surface of the housing 21 and is configured to support the cleaning component 6 to rotate on the housing 21.

[0032] Specifically, the cleaning component is supported on the housing 21 through the first supporting part 63 to meet the requirement that the cleaning component can rotate on the housing 21. The first supporting part 63 is installed near the side of the installation main body 1, and the first supporting part 63 and the first cleaning part 62 abutting against the filter screen cooperate to meet the requirement that the cleaning component rotates on the housing 21.

[0033] In some embodiments, in order to improve the supporting reliability of the first supporting part 63, the first supporting part 63 is of a sleeve structure. The first supporting part 63 will be sleeved outside the housing 21 to support the rotation of the cleaning component.

[0034] In addition, in order to improve the rotational driving force generated by the cleaning component under the action of the water flow, a second water flow driving part 64 is arranged on the outer surface of the first supporting part 63, and the first water flow driving part 61 and the second water flow driving part 64 are arranged adjacent to each other along the rotation axis direction of the cleaning component 6; Among them, the first water flow driving part 61 is configured to be driven by the water flow flowing in the direction of the filter bottle 3 to drive the cleaning component 6 to rotate; The second water flow driving part 64 is configured to be driven by the water flow flowing in the direction of the sewage connection pipe 17 to drive the cleaning component 6 to rotate.

[0035] Specifically, for the water flow flowing inside the pre-filter, it is divided into the water flow that enters the installation main body 1 from the water inlet connection pipe 11 and flows in the direction of the filter bottle 3, and this water flow can act on the first water flow driving part 61.

[0036] Meanwhile, for the water flow inside the pre-filter, it is further divided into the water flow that flows from the filter bottle 3 to the installation main body 1 and is discharged from the sewage connection pipe 17, and this water flow can act on the second water flow driving part 64.

[0037] In this way, under the driving action of the water flow, both the first water flow driving part 61 and the second water flow driving part 64 will drive the cleaning component to rotate effectively on the housing 21, so as to drive the first cleaning part 62 to effectively clean the filter screen.

[0038] In some embodiments, the first water flow driving part 61 and the second water flow driving part 64 are respectively a plurality of guide rib strips formed in the circumferential direction of the outer periphery of the cleaning component 6.

[0039] Specifically, the water flow in the pre-filter acts on the guide rib strips, and the guide rib strips will generate resistance to the water flow, and use the reaction force of the water flow to drive the cleaning component to rotate.

[0040] Among them, the guide rib strips are arranged obliquely with respect to the rotation axis of the cleaning component 6. The inclined arrangement direction of the guide rib strips is matched with the water flow acting on them, so that the guide rib strips respectively constituting the first water flow driving part 61 and the second water flow driving part 64 can apply the same-direction rotational driving force to the cleaning component.

[0041] In another embodiment, a second support part 65 is provided at the other end of the cleaning component 6, and the second support part 65 abuts against the outer surface of the housing 21 and is configured to cooperate with the first support part 63 to support the cleaning component 6 to rotate on the housing 21.

[0042] Specifically, a second support part 65 is further configured at the other end of the cleaning component 6, and the first support part 63 and the second support part 65 cooperate with each other to effectively install the cleaning component 6 on the housing 21.

[0043] Among them, for the specific structural form of the second support part 65, there can be multiple ways. For example: the second support part 65 can also adopt a sleeve structure to sleeved on the housing 21, or the second support part 65 is a plurality of support columns 503 to abut against the housing 21.

[0044] In another embodiment, the cleaning component 6 is integrally in a sleeve structure, and the first cleaning part 62 is arranged on the inner wall of the cleaning component 6.

[0045] Specifically, in order to enable the cleaning component 6 to clean the housing 21 thoroughly, the cleaning component 6 is in a sleeve structure to sleeved on the outside of the housing 21, and a plurality of first cleaning parts 62 can be arranged on the inner wall of the cleaning component 6.

[0046] In addition, a second cleaning part 66 can also be arranged on the outer wall of the cleaning part 6, and the second cleaning part 66 is abutted against the inner wall of the filter bottle 3, so as to clean the inside of the filter bottle 3 through the second cleaning part 66.

[0047] The first cleaning part 62 and the second cleaning part 66 are in a strip structure and extend along the rotation axis direction of the cleaning part 6. Moreover, the first cleaning part 62 and the second cleaning part 66 can be made of flexible materials such as silica gel or rubber, so that the first cleaning part 62 and the second cleaning part 66 can be closely attached to the surface to be cleaned.

[0048] The surface of the cleaning part 6 is provided with a hollow structure, so as to allow the water in the filter bottle 3 to enter the inside of the cleaning part 6 through the hollow structure and be filtered by the filter element 2.

[0049] In another embodiment of the present application, for the sewage discharge connecting pipe 17, an independent valve assembly 7 can be externally connected to control the opening and closing, or a valve assembly 7 can be integrally arranged on the sewage discharge connecting pipe 17.

[0050] Specifically, the valve assembly 7 includes a valve body 71 and a rotating part 72. The valve body 71 is rotatably arranged in the sewage discharge connecting pipe 17, the rotating part 72 is arranged on the valve body 71, and the rotating part 72 extends out of the pipe wall of the sewage discharge connecting pipe 17; the valve body 71 is configured to open and close the sewage discharge connecting pipe 17.

[0051] Specifically, the valve body 71 is located in the sewage discharge connecting pipe 17 and can rotate in the sewage discharge connecting pipe 17. The opening and closing of the sewage discharge connecting pipe 17 is controlled by the rotating valve body 71. The rotating part 72 for driving the valve body 71 to rotate extends outside the pipe wall of the sewage discharge connecting pipe 17, and then the valve body 71 in the sewage discharge connecting pipe 17 is driven to rotate by driving the rotating part 72 to rotate.

[0052] Among them, the specific structure of the valve body 71 can adopt the structure of the valve body 71 in a conventional valve. For example: the valve body 71 can be a spherical structure, and a water flow hole is vertically arranged on the sphere. The position of the water flow hole is controlled by rotating the sphere to realize the opening and closing of the sewage discharge connecting pipe; or the valve body 71 can be a valve plate, and the opening and closing of the sewage discharge connecting pipe is controlled by rotating the valve plate.

[0053] In one embodiment, in order to facilitate the user to open and close the valve body 71 during actual use, the valve assembly 7 further includes a driving handle 73. The driving handle 73 is rotatably arranged on the sewage discharge connecting pipe 17 and is configured to drive the rotating part 72 to rotate.

[0054] Specifically, the driving handle 73 is rotatably mounted on the sewage discharge connecting pipe. When the user rotates the driving handle 73 by hand, the rotating member 72 can be controlled to drive the valve body 71 to rotate, so as to open and close the sewage discharge connecting pipe 17.

[0055] In some embodiments, in order to meet the user's labor-saving operation and achieve a compact structure design, a passive gear structure 74 is provided on the rotating member 72, and an active gear structure 75 is provided on the driving handle 73. The passive gear structure 74 and the active gear structure 75 are engaged.

[0056] Specifically, a passive gear structure 74 is provided at the end of the rotating member 72 extending outside the sewage discharge connecting pipe 17. At the same time, an active gear structure 75 is configured on the driving handle 73. By rotating the driving handle 73, the active gear structure 75 is engaged with the passive gear structure to achieve labor-saving driving of the rotating member 72 to rotate.

[0057] In another embodiment, in order to conveniently integrate and assemble the driving handle 73 onto the sewage discharge connecting pipe 17, the valve assembly 7 further includes a connecting member 76. The connecting member 76 is provided at the pipe orifice of the sewage discharge connecting pipe 17. A sewage discharge hole 761 is provided on the connecting member 76, and the sewage discharge hole 761 is communicated with the sewage discharge connecting pipe 17; an installation hole 731 is provided on the driving handle 73, and the connecting member 76 and / or the sewage discharge connecting pipe 17 is inserted into the installation hole 731; the connecting member 76 is configured to prevent the driving handle 73 from falling off the sewage discharge connecting pipe 17.

[0058] Specifically, the driving handle 73 needs to be integrally installed on the sewage discharge connecting pipe 17 and can rotate on the sewage discharge connecting pipe 17. For this reason, an installation hole 731 is provided on the driving handle 73, and by means of the installation hole 731, the driving handle 73 can rotate relative to the sewage discharge connecting pipe 17. The connecting member 76 is connected to the pipe orifice of the sewage discharge connecting pipe 17 so that the driving handle 73 is located between the connecting member 76 and the passive gear structure 74. On the one hand, it can ensure that the active gear structure 75 can be reliably engaged with the passive gear structure 74. On the other hand, the connecting member 76 can ensure that the driving handle 73 is reliably installed on the sewage discharge connecting pipe 17 to meet the requirements of integrated installation.

[0059] Among them, for the driving handle 73, it can be directly sleeved outside the sewage discharge connecting pipe 17 to meet the requirement of rotatable installation. Or, a stepped structure can be provided on the connecting member 76, and the driving handle 73 is rotatably installed on the stepped structure through the installation hole 731 to limit the driving handle 73 by the stepped surface of the stepped structure.

[0060] In another embodiment of the present application, a decorative cover 400 is further provided on the water heater main body 100, and the water inlet pipe 200 and the water outlet pipe 300 are arranged on the back of the decorative cover 400. It is characterized in that a pre-filter 500 is further included; For the pre-filter 500, the filtering assembly is arranged horizontally as a whole and hidden on the back of the decorative cover 400.

[0061] Specifically, the water inlet pipe 200 configured in the water heater is used to meet the internal water inlet, and the water outlet pipe 300 is used to output the heated water to the water-using terminal. For the water entering the water inlet pipe 200, the water quality can be filtered by the pre-filter 500 first to improve the water inlet quality entering the water heater.

[0062] Among them, since the pre-filter 500 is installed on the water inlet pipe 200, in order to enable the pre-filter 500 to be installed in a hidden manner, the installation structure of the pre-filter 500 is improved and designed.

[0063] Specifically, the filter element 2 and the filter bottle 3 of the pre-filter 500 are both arranged horizontally and are installed and arranged horizontally by extending the space at the bottom of the water heater. In this way, the overall height dimension of the pre-filter 500 can be effectively reduced, and the horizontal space at the bottom of the water heater can meet the installation requirements of the pre-filter 500.

[0064] The installation main body 1 of the pre-filter 500 is connected to an external water pipe through the water inlet connecting pipe 11 and is connected to the water inlet pipe 200 on the water heater main body 100 through the water outlet connecting pipe 12. The filter element 2 and the filter bottle 3 are installed on the corresponding connection ports of the installation main body 1.

[0065] Embodiment 2, as Figures 3 - 10 shown, in the filter provided by another embodiment of the present application, in order to facilitate the connection of different water circuits in the installation main body 1, based on the above Embodiment 1, a water distributor 5 is further provided, and the water distributor 5 is used to meet the water circuit connection requirements between the water inlet connecting pipe 11, the water outlet connecting pipe 12, the sewage connecting pipe 17 and the filter element 2.

[0066] Specifically: the installation main body 1 is provided with an open installation cavity, a first connection port 13 is provided at the open end of the installation cavity, and a second connection port 14 is further provided inside the installation cavity at the first connection port 13.

[0067] The water distributor 5 is provided with a first water flow interface 55, a second water flow interface 57 and a third water flow interface 56.

[0068] Among them, the water separator 5 is arranged on the second connection port 14, the filter bottle 3 is arranged on the first connection port 13 and is hermetically connected to the water separator 5. An outlet water cavity is formed between the water separator 5 and the inner wall of the installation main body 1, and an inlet water cavity is formed between the water separator 5 and the filter bottle 3. The filter element 2 and the cleaning component 6 are arranged between the water separator 5 and the filter bottle 3, and the cleaning component 6 is rotatably sleeved on the housing 21. The inlet connection pipe 11 is communicated with the inlet through the first water flow interface 55, the outlet connection pipe 12 is communicated with the outlet through the second water flow interface 57, and the sewage connection pipe 17 is communicated with the inner space of the filter bottle 3 through the third water flow interface 56.

[0069] Specifically, a water separator 5 is built in the installation main body 1. The water separator 5 forms an independent outlet water cavity in the installation main body 1 to be directly connected to the outlet connection pipe 12, and an inlet water cavity is formed between the water separator 5 and the outer filter bottle 3 in the installation main body 1 to meet the connection requirements of the inlet connection pipe 11.

[0070] Correspondingly, the water separator 5 is provided with a first water flow interface 55, a second water flow interface 57 and a third water flow interface 56 to meet the waterway connection requirements of the inlet connection pipe 11, the outlet connection pipe 12 and the sewage connection pipe 17 configured on the installation main body 1.

[0071] During use, the water flow flowing into the inner side of the water separator 5 through the first water flow interface 55 will act on the first water flow driving part 61, so that the first water flow driving part 61 drives the cleaning component 6 to rotate on the housing 21 under the drive of the water flow. Furthermore, the first cleaning part 62 is driven to rotate with the cleaning component 6 to scrape the filter net 24 on the housing 21.

[0072] In some embodiments, for the water separator 5, it has an end plate part 501 and an annular part 502. The first water flow interface 55 and the third water flow interface 56 are arranged on the annular part 502, and the second water flow interface 57 is arranged on the end plate part 501.

[0073] Specifically, the water separator 5 has a cover shell structure. The end plate part 501 of the water separator 5 is used to form an outlet water cavity at intervals inside the installation cavity of the installation main body 1, and the outlet water cavity can be connected to the inlet of the filter element 2 through the second water flow interface 57.

[0074] The first water flow interface 55 and the third water flow interface 56 are arranged on the annular part 502 of the water separator 5 to connect the inlet connection pipe 11 and the sewage connection pipe 17 respectively.

[0075] Among them, after the water distributor 5 is arranged in the installation main body 1, the end of the filter element 2 with the inlet is connected to the second water flow interface 57 and surrounded by the annular part 502. Moreover, a connection and cooperation structure for sealing connection is formed between the annular part 502, the filter bottle 3 and the installation main body 1, so that a water inlet cavity is formed between the water distributor 5 and the filter bottle 3. In this way, the water conveyed by the water inlet connecting pipe 11 enters the water inlet cavity, and the water in the water inlet cavity is filtered by the filter net 24 of the filter element 2 and output from the outlet of the filter element 2. The water output by the filter element 2 flows into the water outlet cavity through the second water flow interface 57 and is finally output from the water outlet connecting pipe 12.

[0076] In some embodiments, a plurality of support columns 503 are arranged on the end plate part 501, and the support columns 503 are located in the water outlet cavity and abut against the installation main body 1.

[0077] Specifically, in order to position the installation position of the water distributor 5, a plurality of support columns 503 can be arranged on the end plate part 501. After the water distributor 5 is assembled into the installation cavity of the installation main body 1, the support columns 503 abut against the inner wall of the installation cavity to form a water outlet cavity at intervals between the water distributor 5 and the installation main body 1. Among them, the plurality of support columns 503 are distributed around the second water flow interface 57.

[0078] In some embodiments, a diversion channel 551 is further arranged on the inner wall of the annular part 502. The diversion channel 551 communicates with the first water flow interface 55, and the water outlet holes of the diversion channel 551 face the first water flow driving part 61.

[0079] Specifically, in order to effectively drive the cleaning component 6 to rotate rapidly on the filter element 2, the water flowing into the water inlet cavity needs to effectively impact the first water flow driving part 61 on the cleaning component 6. For this reason, a diversion channel 551 is arranged on the inner wall of the annular part 502 to guide the water flowing in from the first water flow interface 55. The water outlet holes of the diversion channel 551 discharge water in the direction of the first water flow driving part 61, and the water output from the water outlet holes of the diversion channel 551 will act on the first water flow driving part 61, thereby ensuring that the first water flow driving part 61 bears a sufficient large water pressure to drive the cleaning component 6 to rotate.

[0080] Similarly, one end of the cleaning component 6 is provided with a first support part 63. The first support part 63 abuts against the outer surface of the housing 21 and is configured to support the cleaning component 6 to rotate on the housing 21. The annular part 502 is located outside the first support part 63.

[0081] The first support part 63 is of a sleeve structure, and a second water flow driving part 64 is arranged on the outer surface of the first support part 63. The first water flow driving part 61 and the second water flow driving part 64 are arranged adjacent to each other along the rotation axis direction of the cleaning component 6; Wherein, the first water flow driving part 61 is configured to be driven by the water flow flowing towards the filter bottle 3 to drive the cleaning component 6 to rotate; The second water flow driving part 64 is configured to be driven by the water flow flowing towards the sewage connection pipe 17 to drive the cleaning component 6 to rotate.

[0082] Specifically, for the first support part 63, it is located in the space formed by the surrounding of the annular part 502, and a third water flow interface 56 is further provided on the annular part 502. In this way, the water flow flowing out from the third water flow interface 56 can be further utilized to act on the second water flow driving part 64 to increase the rotation speed of the water flow driving the cleaning component 6.

[0083] In another embodiment, in order to reduce the mutual influence between the water flows received by the first water flow driving part 61 and the second water flow driving part 64, the cleaning component 6 is integrally of a sleeve structure, and the first cleaning part 62 is arranged on the inner wall of the cleaning component 6; a plurality of connecting ribs 67 are provided between the first support part 63 and the cleaning component 6, and a water flow interval is formed between two adjacent connecting ribs 67, and the water flow interval is configured to output water flow towards the second water flow driving part 64.

[0084] Specifically, for the diversion channel 551, the water outlet direction of its diversion channel 551 is towards the water outlet of the filter bottle 3 to generate a water flow impact on the first water flow driving part 61 in its water outlet direction. The water entering the filter bottle 3 can flow into the space between the cleaning component 6 and the filter element 2 and flow back into the third water flow interface 56 of the water distributor 5. During the process of the water flow flowing back to the water distributor 5, it can flow out through the water flow interval between the two connecting ribs 67 to avoid the first water flow driving part 61 on the outer wall of the cleaning component 6; and, the water flow flowing out from the water flow interval flows onto the surface of the first support part 63 to generate a water flow impact on the second water flow driving part 64, thereby better meeting the requirement of using the water flow to drive the cleaning component 6 to rotate.

[0085] In some embodiments, a second cleaning part 66 is further provided on the outer wall of the cleaning component 6, and the second cleaning part 66 abuts against the inner wall of the filter bottle 3. The first cleaning part 62 and the second cleaning part 66 are of a strip structure and extend along the rotation axis direction of the cleaning component 6. The surface of the cleaning component 6 is provided with a hollow structure. And, in order to ensure reliable support for both ends of the cleaning component 6, a second support part 65 can be provided at the other end of the cleaning component 6, and the second support part 65 abuts against the outer surface of the housing 21 and is configured to cooperate with the first support part 63 to support the cleaning component 6 to rotate on the housing 21. For details, reference can be made to the description in the first embodiment above, and details will not be repeated here.

[0086] In some embodiments, in order to facilitate the user to visually see the usage status of the filter element 2 in the filter bottle 3 and replace the filter element 2 in a timely manner under poor water quality conditions, the filter bottle 3 is made of a transparent or semi-transparent structure.

[0087] Specifically, since the filter bottle 3 is made of a transparent or semi-transparent material, when the user is using it, they can directly observe the status of the filter element 2 in the filter bottle 3, and thus, under poor water quality conditions, the replacement cycle of the filter element 2 can be shortened.

[0088] Embodiment 3, in another embodiment of the present application, for the installation main body, it can be an integral structure. For the convenience of processing, the installation main body can also adopt a split structure, which will be described below with reference to the accompanying drawings.

[0089] As Figure 7 shown, that is, the installation main body 1 includes a first installation component 15 and a second installation component 16. The first installation component 15 is provided with the water inlet connecting pipe 11 and the water outlet connecting pipe 12. An installation cavity is formed in the second installation component 16. The second installation component 16 is provided with a first connection port 13, a second connection port 14, and a sewage connecting pipe 17. The first installation component 15 and the second installation component 16 are fixedly connected together. The water inlet connecting pipe 11, the water outlet connecting pipe 12, and the sewage connecting pipe 17 are respectively communicated with the installation cavity. The inlet of the filter element 2 is located in the filter bottle 3, and the outlet of the filter element 2 is located in the installation cavity.

[0090] Specifically, for the installation main body 1, since two independent water flow requirements of water inlet and water outlet need to be satisfied inside it, in order to simplify the processing difficulty, the water inlet connecting pipe 11 and the water outlet connecting pipe 12 are provided on the first installation component 15, and the sewage connecting pipe 17 is provided on the second installation component 16.

[0091] In order to meet the requirements of water inlet and water outlet inside the installation main body 1 and meet the installation design requirements of structural compactness and miniaturization, the following structural improvements are made to the installation main body 1.

[0092] The first installation component 15 is a three-way pipe. The three ends of the three-way pipe respectively form the water inlet connecting pipe 11, the water outlet connecting pipe 12, and the auxiliary connecting pipe 153. The water inlet connecting pipe 11 and the auxiliary connecting pipe 153 are arranged back to back. The second installation component 16 is provided with a communication port, and the communication port communicates with the installation cavity.

[0093] The pre-filter further includes an intermediate pipe 4, which is arranged in the water inlet connecting pipe 11. The outer end of the intermediate pipe 4 is sealingly connected to the inner pipe wall of the water inlet connecting pipe 11. The water inlet of the water inlet connecting pipe 11 communicates with the intermediate pipe 4. The inner end of the intermediate pipe 4 passes through the communication port and extends into the installation cavity. An auxiliary flow channel 111 is formed between the outer pipe wall of the intermediate pipe 4 and the inner pipe wall of the water inlet connecting pipe 11. The water outlet connecting pipe 12 communicates with the water outlet cavity through the auxiliary flow channel 111 and the communication port. The inner pipe orifice of the intermediate pipe 4 communicates with the water inlet cavity.

[0094] Specifically, for the first installation component 15, its overall structure is a three-way pipe structure, and correspondingly, a water inlet connecting pipe 11 and a water outlet connecting pipe 12 are formed. The other orifice of the three-way pipe will form an auxiliary connecting pipe 153 to connect with the communication port of the second installation component 16 through the auxiliary connecting pipe 153.

[0095] For the water inlet connecting pipe 11 and the water outlet connecting pipe 12 on the first installation component 15, they need to meet the requirements of water inlet and outlet. By arranging the intermediate pipe 4 in the water inlet connecting pipe 11, an auxiliary flow channel 111 can be formed between the intermediate pipe 4 and the inner pipe wall of the water inlet connecting pipe 11. The first installation component 15 is a three-way pipe structure, so that the auxiliary flow channel 111 communicates with the water outlet connecting pipe 12. After the first installation component 15 is connected to the second installation component 16, the auxiliary connecting pipe 153 is connected to the communication port, so that the auxiliary flow channel 111 communicates with the water outlet cavity through the communication port. At the same time, the orifice of the inner end of the intermediate pipe 4 extends into the installation cavity of the second installation component 16 through the auxiliary connecting pipe 153 and the communication port to achieve communication with the water inlet cavity.

[0096] The auxiliary flow channel 111 is formed in the water inlet connecting pipe 11 by using the intermediate pipe 4 to meet the communication requirement between the water outlet connecting pipe 12 and the water outlet cavity, making the overall structure of the first installation component 15 more compact and small, thus meeting the design requirements of miniaturization.

[0097] The water distributor 5 arranged in the installation cavity of the second installation component 16 is used to separate the water outlet cavity and the water inlet cavity in the installation cavity of the second installation component 16. A protruding annular spacer 51 is arranged on the annular part on one side of the communication port, so that the water inlet cavity and the water outlet cavity are separated in the installation cavity of the second installation component 16.

[0098] In some embodiments, a plug-in part 54 is arranged on the annular part. A first water flow interface 55 arranged opposite to the communication port is arranged on the plug-in part 54. The first water flow interface 55 communicates with a diversion channel 551 on the inner wall of the annular part. The inner end of the intermediate pipe 4 is hermetically inserted into the first water flow interface 55, and the inner pipe orifice of the intermediate pipe 4 communicates with the water inlet cavity through the diversion channel 551.

[0099] During the assembly process, the inner end of the intermediate pipe 4 is inserted into the first water flow interface 55 so that the intermediate pipe 4 communicates with the water inlet cavity through the diversion channel 551. Moreover, the intermediate pipe 4 and the insertion part 54 cooperate with each other so that the inner port of the intermediate pipe 4 can be isolated from the water outlet cavity, thereby effectively isolating the water inlet cavity and the water outlet cavity.

[0100] In addition, by arranging the insertion part 54 on the annular part, it can better meet the flow requirement of the water outlet flow by borrowing the internal flow channel of the water inlet connecting pipe 11 for the water outlet connecting pipe 12. At the same time, during the overall assembly of the pre-filter, it is convenient to effectively connect the inner end of the intermediate pipe 4 to the water inlet cavity while also effectively isolating it from the water outlet cavity, facilitating the quick and precise assembly of the pre-filter.

[0101] In order to further increase the space at the water inlet orifice of the water outlet connecting pipe 12, a recessed structure 41 can also be provided on the intermediate pipe 4. The recessed structure 41 is arranged opposite to the water inlet orifice of the water outlet connecting pipe 12. In this way, the water received and delivered by the auxiliary flow channel 111 can flow more smoothly into the water outlet connecting pipe 12 at the recessed structure 41 to ensure the smooth flow of the water outlet flow.

[0102] 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 foregoing embodiments, those of ordinary skill in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present invention.

Claims

1. A pre-filter, characterized in that, it includes: An installation body, the installation body is provided with an open installation cavity, an opening end of the installation cavity is provided with a first connection port, and a second connection port is further provided inside the installation cavity at the position of the first connection port; an inlet connection pipe, an outlet connection pipe and a sewage connection pipe are arranged on the installation body; A filter element, the filter element includes a housing and a filter net, the housing is provided with an inlet and an outlet, and the filter net covers the inlet; A filter bottle; A cleaning component, the cleaning component is provided with a first water flow driving part and a first cleaning part; A water distributor, the water distributor is provided with a first water flow interface, a second water flow interface and a third water flow interface; Wherein, the water distributor is arranged on the second connection port, the filter bottle is arranged on the first connection port and is hermetically connected to the water distributor, an outlet cavity is formed between the water distributor and the inner wall of the installation body, and an inlet cavity is formed between the water distributor and the filter bottle; the filter element and the cleaning component are arranged between the water distributor and the filter bottle, and the cleaning component is rotatably sleeved on the housing; The inlet connection pipe is communicated with the inlet through the first water flow interface, the outlet connection pipe is communicated with the outlet through the second water flow interface, and the sewage connection pipe is communicated with the internal space of the filter bottle through the third water flow interface.

2. The pre-filter according to claim 1, characterized in that, The water distributor has an end plate part and an annular part, the first water flow interface and the third water flow interface are arranged on the annular part, and the second water flow interface is arranged on the end plate part.

3. The pre-filter according to claim 2, characterized in that, A diversion channel is further arranged on the inner wall of the annular part, the diversion channel communicates with the first water flow interface, and the water outlet holes of the diversion channel face the first water flow driving part.

4. The pre-filter according to claim 2, characterized in that, One end of the cleaning component is provided with a first supporting part, the first supporting part abuts against the outer surface of the housing and is configured to support the cleaning component to rotate on the housing, and the annular part is located outside the first supporting part.

5. The pre-filter according to claim 4, characterized in that, The first supporting part is of a sleeve structure, a second water flow driving part is arranged on the outer surface of the first supporting part, and the first water flow driving part and the second water flow driving part are arranged adjacent to each other along the rotation axis direction of the cleaning component; Wherein, the first water flow driving part is configured to be driven by the water flow flowing towards the filter bottle direction to drive the cleaning component to rotate; The second water flow driving part is configured to be driven by the water flow flowing towards the sewage connection pipe direction to drive the cleaning component to rotate.

6. The pre-filter according to claim 5, characterized in that, The cleaning component is integrally of a sleeve type structure, and the first cleaning part is arranged on the inner wall of the cleaning component; A plurality of connecting ribs are provided between the first support portion and the cleaning component, and a water flow interval is formed between two adjacent connecting ribs. The water flow interval is configured to output water flow toward the second water flow driving portion.

7. The pre-filter according to claim 4, wherein, a second support portion is provided at the other end of the cleaning component. The second support portion abuts against the outer surface of the housing and is configured to cooperate with the first support portion to support the cleaning component to rotate on the housing.

8. The pre-filter according to claim 1, wherein, a second cleaning portion is further provided on the outer wall of the cleaning component. The second cleaning portion abuts against the inner wall of the filter bottle.

9. The pre-filter according to any one of claims 1-8, wherein, a switchable valve assembly is further provided on the sewage connection pipe. The valve assembly is configured to open and close the sewage connection pipe.

10. The pre-filter according to claim 9, wherein, the valve assembly includes a valve body and a rotating component. The valve body is rotatably provided in the sewage connection pipe. The rotating component is provided on the valve body. The rotating component extends outside the pipe wall of the sewage connection pipe. The valve body is configured to open and close the sewage connection pipe.

11. The pre-filter according to claim 10, wherein, the valve assembly further includes a driving handle. The driving handle is rotatably provided on the sewage connection pipe and is configured to drive the rotating component to rotate.

12. The pre-filter according to claim 11, wherein, a passive tooth structure is provided on the rotating component, and an active tooth structure is provided on the driving handle. The passive tooth structure and the active tooth structure are engaged.

13. The pre-filter according to claim 12, wherein, the valve assembly further includes a connecting member. The connecting member is provided at the pipe orifice of the sewage connection pipe. A sewage discharge hole is provided on the connecting member. The sewage discharge hole is communicated with the sewage connection pipe. An installation hole is provided on the driving handle. The connecting member and / or the sewage connection pipe are inserted into the installation hole. The connecting member is configured to prevent the driving handle from falling off the sewage connection pipe.

14. A water heater, the water heater is configured with a water inlet pipe and a water outlet pipe, wherein, it further includes the pre-filter according to any one of claims 1-13. The water outlet connection pipe of the pre-filter is connected to the water inlet pipe.

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