Front water treatment equipment and water heater

Abstract

The invention discloses front-mounted water treatment equipment and a water heater. The front-mounted water treatment equipment comprises a connecting main body, a filter element, a cleaning part, a filter bottle and a middle pipe, the connecting main body comprises a first connecting piece and a second connecting piece, the first connecting piece is a three-way pipe, a water inlet connecting pipe, a water outlet connecting pipe and an auxiliary connecting pipe are respectively formed at three end parts of the first connecting piece, and a sewage discharging connecting pipe and a communicating port are arranged on the second connecting piece; the filter element comprises a shell and a filter screen; the cleaning part is provided with a first water flow driving part and a first cleaning part; the cleaning part is rotatably arranged on the shell in a sleeving mode, the first water flow driving part is configured to be driven by water flow to drive the cleaning part to rotate on the shell, and the first cleaning part is configured to rotate along with the cleaning part to scrape a filter screen on the shell; and the whole front water treatment equipment is transversely arranged. The space occupied by the installation height of the front water treatment equipment is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of household appliances, and particularly relates to a pre-treatment water treatment device 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 of the user's home, for this reason, a filter is provided at the water inlet pipe of a conventional water heater, and the filter is used to filter the water entering the water inlet pipe. Chinese Patent Publication No. CN203944183U discloses a filter for a water heater and a water heater having the filter. A filter screen is provided in the 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, in order to meet the requirements of the water inlet and outlet of the filter, generally, the water inlet of the filter is arranged on the side, and the water outlet of the filter is arranged on the top, so that the water inlet and the water outlet are arranged in an interlaced and separated manner. When assembling, the filter needs to be arranged vertically, occupying a large space. And after the filter element is used for a long time, the filter bottle needs to be regularly disassembled to clean the filter element, resulting in a poor user experience. In view of this, how to design a technology that reduces the installation height occupied space of the filter and improves the user experience is the technical problem to be solved by the present invention. Summary of the Invention

[0005] The present invention provides a pre-treatment water treatment device and a water heater, which realize reducing the installation height occupied space of the pre-treatment water treatment device and improving the user experience.

[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-treatment water treatment device, including: A connection main body, the connection main body includes a first connection member and a second connection member detachably connected together. The first connection member is a three-way pipe, and three end portions of the three-way pipe respectively form a water inlet connection pipe, a water outlet connection pipe, and an auxiliary connection pipe. An installation cavity is formed in the second connection member, and a sewage connection pipe and a communication port communicating with the installation cavity are provided on the second connection member. The auxiliary connection pipe is connected to the communication 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 cleaning component, the cleaning component is provided with a first water flow driving part and a first cleaning part; Filter bottle; Intermediate pipe; Wherein, the filter bottle and the filter element are arranged on the second connecting part, and the filter bottle covers the filter element; the intermediate pipe is arranged in the water inlet connecting pipe, and an auxiliary flow channel is formed between the outer wall of the intermediate pipe and the inner wall of the water inlet connecting pipe. The water outlet connecting pipe communicates with the outlet of the filter element through the auxiliary flow channel and the communication port. The water inlet of the water inlet connecting pipe communicates with the inlet of the filter element through the intermediate pipe, and the sewage connecting pipe communicates with the internal space of the filter bottle; The cleaning component is rotatably sleeved on the housing, the first water flow driving part is configured to be driven by water flow to drive the cleaning component to rotate on the housing, and the first cleaning part is configured to follow the rotation of the cleaning component to scrape the filter net on the housing; The whole pre-treatment water equipment is arranged horizontally.

[0007] In an embodiment of the present application, the outer end of the intermediate pipe is hermetically connected to the inner wall of the water inlet connecting pipe, the water inlet of the water inlet connecting pipe communicates with the intermediate pipe, and the inner end of the intermediate pipe passes through the communication port and extends into the installation cavity.

[0008] In an embodiment of the present application, it further includes: 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; The water distributor is arranged in the installation cavity and forms a water inlet cavity with the filter bottle. An outlet cavity is formed between the water distributor and the inner wall of the second connecting part. The filter element and the cleaning component are arranged between the water distributor and the filter bottle; The intermediate pipe communicates with the inlet through the first water flow interface, the auxiliary flow channel communicates with the outlet through the second water flow interface, and the sewage connecting pipe communicates with the internal space of the filter bottle through the third water flow interface.

[0009] In an embodiment of the present application, 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; A plurality of support columns are arranged on the end plate part, and the support columns are located in the outlet cavity and abut against the second connecting part.

[0010] In an embodiment of the present application, 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.

[0011] In an embodiment of the present application, a first support portion is provided at one end of the cleaning component. The first support portion abuts against the outer surface of the housing and is configured to support the cleaning component to rotate on the housing, and the annular portion is located outside the first support portion.

[0012] In an embodiment of the present application, the first support portion is of a sleeve structure, and a second water flow driving portion is provided on the outer surface of the first support portion. The first water flow driving portion and the second water flow driving portion are arranged adjacent to each other along the rotation axis direction of the cleaning component; Wherein, the first water flow driving portion is configured to be driven by the water flow flowing towards the filter bottle to drive the cleaning component to rotate; The second water flow driving portion is configured to be driven by the water flow flowing towards the sewage connection pipe to drive the cleaning component to rotate.

[0013] In an embodiment of the present application, the cleaning component is integrally of a sleeve type structure, and the first cleaning portion 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 towards the second water flow driving portion.

[0014] In an embodiment of the present application, 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.

[0015] In another aspect, the present application further provides a water heater, including a water tank. The water tank is configured with a water inlet pipe and a water outlet pipe, and further includes the above-mentioned pre-treatment device for water treatment. The water outlet connecting pipe of the pre-treatment device for water treatment is connected to the water inlet pipe. A decorative cover is provided on the water tank, and the decorative cover covers the front side of the pre-treatment device for water treatment.

[0016] By adopting a split design for the connection main body, a first flow channel and a second flow channel arranged side by side are correspondingly formed on the first connecting member to meet the requirements of the water path connection of the water inlet connecting pipe and the water outlet connecting pipe. The second connecting member is used for installing the filter element and the filter bottle. For the filter element and the filter bottle, they are arranged to extend horizontally as a whole. In this way, after the pre-treatment device for water treatment is installed on the water inlet pipe of the water heater, the filter element and the filter bottle will be installed and arranged by using the horizontal space at the bottom of the water heater, thereby reducing the occupied space of the pre-treatment device for water treatment in the height direction. In this way, the pre-treatment device for water treatment can be hidden inside the decorative cover of the water heater to optimize the overall appearance effect and improve the user experience.

[0017] Meanwhile, by arranging a cleaning component on the filter element, the cleaning component is provided with a first water flow driving part and a first cleaning part. The first water flow driving part can drive the cleaning component to rotate on the filter element by using the water flow flowing in the filter. In this way, when it is necessary to clean the surface of the filter element in the filter, the sewage connection 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 filtering efficiency of the filter caused by the blockage of the filter net of the filter element by dirt, and achieving the improvement of the filtering efficiency of the filter and the extension of the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 the description of the embodiments or the prior art. Obviously, the following drawings 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.

[0019] Figure 1 It is a schematic structural diagram of an embodiment of the water heater of the present invention; Figure 2 It is a second schematic structural diagram of an embodiment of the water heater of the present invention; Figure 3 It is Figure 1 a first schematic structural diagram of the pre-treatment water equipment in Figure 4 It is Figure 1 a second schematic structural diagram of the pre-treatment water equipment in Figure 5 It is Figure 1 a third schematic structural diagram of the pre-treatment water equipment in Figure 6 It is Figure 5 a sectional view taken along the line A-A in Figure 7 It is Figure 3 an exploded view of the pre-treatment water equipment in Figure 8 It is Figure 7 a schematic structural diagram of the cleaning component in Figure 9 It is Figure 7 a first schematic structural diagram of the water distributor in Figure 10 It is Figure 7 a second schematic structural diagram of the water distributor in

[0020] Reference numerals: 100, water heater main body; 200, water inlet pipe; 300, water outlet pipe; 400, decorative cover; 500, pre-treatment water equipment; 1. Connection body; 11. Water inlet connecting pipe; 12. Water outlet connecting pipe; 13. First connection port; 14. Second connection port; 15. First connector; 16. Second connector; 17. Sewage 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 tooth structure; 75. Active tooth structure; 76. Connector; 731. Mounting hole; 761. Sewage hole. Detailed implementation manners

[0021] 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. Apparently, 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.

[0022] 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.

[0023] In the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may 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 circumstances.

[0024] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" 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 additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" 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 "under", "below" 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.

[0025] 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. Such 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.

[0026] As Figure 1 and Figure 2 As shown, the present application provides an appliance, which includes a water heater main body 100. The represented entity of the water heater main body 100 may be the water tank of an electric water heater, or a heat pump water heater, or a solar water heater.

[0027] 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.

[0028] Wherein, 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-treatment device 500 may 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-treatment device 500.

[0029] Embodiment 1, asFigures 3 - 8 As shown, in general, the pre-treatment water treatment device includes a connection main body 1 and a filtration component. The filtration component includes a filter element 2 and a filter bottle 3. The connection 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 connection main body 1 is also used to install the filter element 2 and the filter bottle 3 of the filtration component.

[0030] The filter bottle 3 and the filter element 2 are arranged on the connection main body 1. The filter bottle 3 covers the filter element 2. The water inlet connection pipe 11 is communicated with the inlet, and the water outlet connection pipe 12 is communicated with the outlet. Among them, a water inlet connection pipe 11 and a water outlet connection pipe 12 are arranged on the connection 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.

[0031] In addition, since the filter element 2 is installed between the connection 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-treatment water treatment device 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.

[0032] 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 along with the cleaning component 6 to scrape the filter net 24 on the housing 21.

[0033] 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 connection pipe 17 is further arranged on the connection main body 1. The sewage discharge connection pipe 17 is communicated with the inner space of the filter bottle 3.

[0034] Specifically, in the actual use process, when the pre-treatment water treatment device is in normal filtration use, water enters the connection main body 1 through the water inlet connection pipe 11 and flows into the filter bottle 3. The water is filtered by the filter net 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 connection pipe 12 and be output and used in the water heater.

[0035] After long-term use, the surface of the filter net will be covered with dirt such as sediment filtered out. In this way, the filtering ability of the filter net will be reduced, and thus the filtering efficiency will be decreased. At this time, the sewage discharge connection pipe 17 can be opened to clean the filter net of the filter element 2 through the cleaning component 6.

[0036] Specifically, first open the sewage connection pipe 17. The water introduced by the water inlet connection pipe 11 enables the water in the filter bottle 3 to be discharged via the sewage connection pipe 17. During the flow of the water in the pre-treatment device, 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 filter screen of the filter element 2 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-treatment device can maintain a high filtering ability stably for a long time, and thus extending the overall service life of the pre-treatment device.

[0037] Among them, when the sewage connection pipe 17 is in an open state, the water introduced from the water inlet connection pipe 11 enters the connection main body 1, and at least part of the water flows from the connection 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 so as to clean the filter screen 24 through the first cleaning part 62. The water flowing into the filter bottle 3 flows out through the surface of the housing 21 and is discharged through the sewage connection pipe 17.

[0038] Specifically, during use, when the sewage connection pipe 17 is opened, the water introduced by the water inlet connection pipe 11 will enter the filter bottle 3. In addition, part of the water flow introduced by the water inlet connection pipe 11 will directly be discharged from the sewage connection pipe 17 inside the connection main body 1 under the action of the water flowing out of the sewage connection pipe 17.

[0039] By configuring the 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 use the water flow flowing in the pre-treatment device to drive the cleaning component 6 to rotate on the filter element 2. In this way, when it is necessary to clean the surface of the filter element 2 in the pre-treatment device, open the sewage connection pipe 17, and use the water flow flowing into the pre-treatment device to drive the cleaning component 6 to rotate to clean the filter screen 24 of the filter element 2, reducing the reduction of the filtering efficiency of the pre-treatment device due to the blockage of the filter screen 24 of the filter element 2, and realizing the improvement of the filtering efficiency and the extension of the service life of the pre-treatment device.

[0040] 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 provided at one end of the cleaning component 6. 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.

[0041] Specifically, the cleaning component is supported on the housing 21 through the first support portion 63 to enable the cleaning component to rotate on the housing 21. The first support portion 63 is installed near the side of the connection body 1, and the first support portion 63 and the first cleaning portion 62 that abuts against the filter mesh cooperate to meet the requirement for the cleaning component to rotate on the housing 21.

[0042] In some embodiments, in order to improve the support reliability of the first support portion 63, the first support portion 63 is of a sleeve structure. The first support portion 63 will be sleeved outside the housing 21 to support the rotation of the cleaning component.

[0043] In addition, in order to increase the rotational driving force generated by the cleaning component under the action of water flow, a second water flow driving portion 64 is provided on the outer surface of the first support portion 63, and the first water flow driving portion 61 and the second water flow driving portion 64 are arranged adjacent to each other along the rotation axis direction of the cleaning component 6; Wherein, the first water flow driving portion 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 portion 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.

[0044] Specifically, for the water flow flowing inside the pre-treatment water equipment, it is divided into the water flow that enters the connection body 1 from the water inlet connection pipe 11 and flows towards the filter bottle 3, and this water flow can act on the first water flow driving portion 61.

[0045] Meanwhile, for the water flow flowing inside the pre-treatment water equipment, it is also divided into the water flow that flows from the filter bottle 3 to the connection body 1 and is discharged from the sewage connection pipe 17, and this water flow can act on the second water flow driving portion 64.

[0046] In this way, under the driving action of the water flow on both the first water flow driving portion 61 and the second water flow driving portion 64, the cleaning component will be driven to rotate effectively on the housing 21 to drive the first cleaning portion 62 to effectively clean the filter mesh.

[0047] In some embodiments, the first water flow driving portion 61 and the second water flow driving portion 64 are respectively a plurality of flow guiding rib strips formed in the circumferential direction of the outer periphery of the cleaning component 6.

[0048] Specifically, the water flow in the pre-treatment water equipment acts on the flow guiding rib strips, and the flow guiding rib strips will generate resistance to the water flow, and the reaction force of the water flow is used to drive the cleaning component to rotate.

[0049] Among them, the flow guiding rib strips are arranged obliquely with respect to the rotation axis of the cleaning component 6. The inclined arrangement direction of the flow guiding rib strips is matched with the water flow acting on them, so that the flow guiding rib strips that respectively form the first water flow driving part 61 and the second water flow driving part 64 can apply a rotational driving force in the same direction to the cleaning component.

[0050] In another embodiment, a second support part 65 is provided at the other end of the cleaning component 6. 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.

[0051] Specifically, the other end of the cleaning component 6 is further configured with a second support part 65. The first support part 63 and the second support part 65 cooperate with each other so that the cleaning component 6 is effectively installed on the housing 21.

[0052] Among them, there can be multiple forms of the specific structural form of the second support part 65. For example: the second support part 65 can also adopt a sleeve structure to sleeve on the housing 21, or the second support part 65 is multiple support columns 503 to abut against the housing 21.

[0053] 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.

[0054] Specifically, in order to enable the cleaning component 6 to thoroughly clean the housing 21, the cleaning component 6 is in a sleeve structure to sleeve on the outside of the housing 21, and multiple first cleaning parts 62 can be arranged on the inner wall of the cleaning component 6.

[0055] In addition, a second cleaning part 66 can also be provided on the outer wall of the cleaning component 6. The second cleaning part 66 abuts against the inner wall of the filter bottle 3 to clean the inside of the filter bottle 3 through the second cleaning part 66.

[0056] 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 component 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 closely adhere to the surface to be cleaned.

[0057] The surface of the cleaning component 6 is provided with a hollow structure to allow the water in the filter bottle 3 to enter the inside of the cleaning component 6 through the hollow structure for filtration treatment by the filter element 2.

[0058] 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 of the controller, or a valve assembly 7 can be integrally provided on the sewage discharge connecting pipe 17.

[0059] Specifically: The valve assembly 7 includes a valve body 71 and a rotating member 72. The valve body 71 is rotatably disposed in the sewage discharge connecting pipe 17. The rotating member 72 is disposed on the valve body 71, and the rotating member 72 extends outside 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.

[0060] 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 member 72 that drives 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 member 72 to rotate.

[0061] Among them, for the specific structure of the valve body 71, the structure of the valve body 71 in a conventional valve can be adopted. 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 exhaust connecting pipe; or, the valve body 71 can be a valve plate, and the opening and closing of the exhaust connecting pipe is controlled by rotating the valve plate.

[0062] 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 disposed on the sewage discharge connecting pipe 17 and is configured to drive the rotating member 72 to rotate.

[0063] Specifically, the driving handle 73 is rotatably installed on the exhaust connecting pipe. The user rotates the driving handle 73 by hand, and can control the rotating member 72 to drive the valve body 71 to rotate, so as to realize the opening and closing of the sewage discharge connecting pipe 17.

[0064] In some embodiments, in order to meet the user's labor-saving operation and achieve a compact structure design, a passive tooth structure 74 is provided on the rotating member 72, and an active tooth structure 75 is provided on the driving handle 73. The passive tooth structure 74 and the active tooth structure 75 are engaged.

[0065] Specifically, a passive tooth 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 tooth structure 75 is configured on the driving handle 73. By rotating the driving handle 73, the rotating member 72 is driven to rotate labor-savingly through the meshing cooperation of the active tooth structure 75 and the passive gear structure.

[0066] In another embodiment, to facilitate the integrated assembly of the drive handle 73 onto the sewage connection pipe 17, the valve assembly 7 further includes a connecting member 76. The connecting member 76 is disposed at the pipe opening of the sewage connection pipe 17. A sewage discharge hole 761 is provided on the connecting member 76, and the sewage discharge hole 761 communicates with the sewage connection pipe 17. An installation hole 731 is provided on the drive handle 73, and the connecting member 76 and / or the sewage connection pipe 17 is inserted into the installation hole 731. The connecting member 76 is configured to prevent the drive handle 73 from detaching from the sewage connection pipe 17.

[0067] Specifically, the drive handle 73 needs to be integrally installed on the sewage connection pipe 17 and can rotate on the sewage connection pipe 17. For this purpose, an installation hole 731 is provided on the drive handle 73, and by means of the installation hole 731, the drive handle 73 can rotate relative to the sewage connection pipe 17. The connecting member 76 is connected to the pipe opening of the sewage connection pipe 17 so that the drive 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 reliably mesh with the passive gear structure 74. On the other hand, the connecting member 76 can ensure that the drive handle 73 is reliably installed on the sewage connection pipe 17 to meet the requirements of integrated installation.

[0068] Among them, for the drive handle 73, it can be directly sleeved outside the sewage connection pipe 17 to meet the requirement of rotatable installation. Or, a stepped structure can be provided on the connecting member 76, and the drive handle 73 is rotatably installed on the stepped structure through the installation hole 731 to limit the drive handle 73 by the stepped surface of the stepped structure.

[0069] 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-treatment water treatment device 500 is further included. For the pre-treatment water treatment device 500, the filtering assembly is arranged horizontally as a whole and hidden on the back of the decorative cover 400.

[0070] Specifically, the water inlet pipe 200 configured for the water heater is used to supply water inside, 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-treatment water treatment device 500 first to improve the quality of the water entering the water heater.

[0071] Among them, since the pre-treatment water treatment device 500 is installed on the water inlet pipe 200, in order to enable the pre-treatment water treatment device 500 to achieve a hidden installation method, the installation structure of the pre-treatment water treatment device 500 is improved and designed.

[0072] Specifically, the filter element 2 and the filter bottle 3 of the pre-treatment water treatment device 500 are both arranged horizontally and are installed and arranged by horizontally extending and utilizing the space at the bottom of the water heater. In this way, the overall height dimension of the pre-treatment water treatment device 500 can be effectively reduced, and the horizontal space at the bottom of the water heater can meet the installation requirements of the pre-treatment water treatment device 500.

[0073] The connection main body 1 of the pre-treatment water treatment device 500 is connected to the external water pipe through the water inlet connection pipe 11 and is connected to the water inlet pipe 200 on the water heater main body 100 through the water outlet connection pipe 12. The filter element 2 and the filter bottle 3 are installed on the corresponding connection ports of the connection main body 1.

[0074] Embodiment 2, as Figures 3 - 10 shown, in the pre-treatment water treatment device provided by another embodiment of the present application, in order to facilitate the connection between different water circuits in the connection main body 1, based on the above Embodiment 1, a water distributor 5 is further provided to meet the water circuit connection requirements between the water inlet connection pipe 11, the water outlet connection pipe 12, the sewage connection pipe 17 and the filter element 2 by using the water distributor 5.

[0075] Specifically: the connection main body 1 is provided with an open installation cavity, the opening end of the installation cavity is provided with a first connection port 13, and a second connection port 14 is further provided inside the installation cavity at the first connection port 13.

[0076] 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.

[0077] Among them, the water distributor 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 distributor 5, an outlet cavity is formed between the water distributor 5 and the inner wall of the connection main body 1, and an inlet cavity is formed between the water distributor 5 and the filter bottle 3; the filter element 2 and the cleaning component 6 are arranged between the water distributor 5 and the filter bottle 3, and the cleaning component 6 is rotatably sleeved on the housing 21; The water inlet connection pipe 11 is communicated with the inlet through the first water flow interface 55, the water 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 internal space of the filter bottle 3 through the third water flow interface 56.

[0078] Specifically, a water distributor 5 is built into the connection main body 1, and the water distributor 5 forms an independent outlet cavity in the connection main body 1 to be directly connected to the water outlet connection pipe 12, while an inlet cavity is formed between the water distributor 5 and the outer filter bottle 3 in the connection main body 1 to meet the connection requirements with the water inlet connection pipe 11.

[0079] Correspondingly, a first water flow interface 55, a second water flow interface 57 and a third water flow interface 56 are provided on the water distributor 5 to meet the water connection requirements for connecting the water inlet connection pipe 11, the water outlet connection pipe 12 and the sewage connection pipe 17 configured on the main body 1.

[0080] During use, the water flow flowing into the inner side of the water distributor 5 through the first water flow interface 55 will act on the first water flow driving part 61, causing the first water flow driving part 61 to drive the cleaning part 6 to rotate on the housing 21 under the drive of the water flow, and then the first cleaning part 62 is driven to rotate with the cleaning part 6 to scrape the filter screen 24 on the housing 21.

[0081] In some embodiments, for the water distributor 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 provided on the annular part 502, and the second water flow interface 57 is provided on the end plate part 501.

[0082] Specifically, the water distributor 5 has a cover structure. The end plate part 501 of the water distributor 5 is used to form a water outlet cavity at intervals inside the installation cavity of the connecting main body 1, and the water outlet cavity can be connected to the inlet of the filter element 2 through the second water flow interface 57.

[0083] The first water flow interface 55 and the third water flow interface 56 are configured on the annular part 502 of the water distributor 5 to connect the water inlet connection pipe 11 and the sewage connection pipe 17 respectively.

[0084] Among them, after the water distributor 5 is arranged in the connecting main body 1, the end of the filter element 2 with the inlet is connected to the second water flow interface 57 and is surrounded by the annular part 502. Moreover, a connection and cooperation structure with a sealed connection is formed between the annular part 502, the filter bottle 3 and the connecting 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 connection pipe 11 enters the water inlet cavity, the water in the water inlet cavity is filtered through the filter screen 24 of the filter element 2 and output from the outlet of the filter element 2, and the water output from 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 connection pipe 12.

[0085] In certain embodiments, a plurality of support columns 503 are provided on the end plate part 501, and the support columns 503 are located in the water outlet cavity and abut against the connecting main body 1.

[0086] Specifically, in order to position the installation position of the water distributor 5, a plurality of support columns 503 can be provided on the end plate part 501. After the water distributor 5 is assembled and connected to the installation cavity of the connecting 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 connecting main body 1. Among them, the plurality of support columns 503 are distributed around the second water flow interface 57.

[0087] In some embodiments, a diversion channel 551 is further provided on the inner wall of the annular portion 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 portion 61.

[0088] 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 portion 61 on the cleaning component 6. For this purpose, a diversion channel 551 is provided on the inner wall of the annular portion 502 to guide the water flow 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 portion 61. The water output from the water outlet holes of the diversion channel 551 will act on the first water flow driving portion 61, thereby ensuring that the first water flow driving portion 61 bears a sufficient water pressure to drive the cleaning component 6 to rotate.

[0089] Similarly, one end of the cleaning component 6 is provided with a first support portion 63. The first support portion 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 portion 502 is located outside the first support portion 63.

[0090] The first support portion 63 is of a sleeve structure, and a second water flow driving portion 64 is provided on the outer surface of the first support portion 63. The first water flow driving portion 61 and the second water flow driving portion 64 are arranged adjacent to each other along the rotation axis direction of the cleaning component 6; Wherein, the first water flow driving portion 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 portion 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.

[0091] Specifically, the first support portion 63 is located in the space formed by the surrounding of the annular portion 502, and a third water flow interface 56 is further provided on the annular portion 502. In this way, the water flow flowing out from the third water flow interface 56 can be further used to act on the second water flow driving portion 64 to increase the rotation speed of the water flow driving the cleaning component 6.

[0092] In another embodiment, in order to reduce the mutual influence between the water flows received by the first water flow driving portion 61 and the second water flow driving portion 64, the cleaning component 6 is integrally of a sleeve structure, and the first cleaning portion 62 is arranged on the inner wall of the cleaning component 6; a plurality of connecting ribs 67 are provided between the first support portion 63 and the cleaning component 6, and a water flow interval is formed between two adjacent connecting ribs 67. The water flow interval is configured to output water flow towards the second water flow driving portion 64.

[0093] Specifically, for the diversion channel 551, the water outlet direction of the diversion channel 551 faces 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 part 6 and the filter element 2 and then flow back to the third water flow interface 56 of the water distributor 5. During the process of the water 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 part 6; moreover, the water flowing out from the water flow interval flows onto the surface of the first supporting 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 part 6 to rotate.

[0094] In some embodiments, a second cleaning part 66 is further provided on the outer wall of the cleaning part 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 in a strip structure and extend along the rotation axis direction of the cleaning part 6. The surface of the cleaning part 6 is provided with a hollow structure. And, in order to ensure reliable support for both ends of the cleaning part 6, a second supporting part 65 can be provided at the other end of the cleaning part 6, and the second supporting part 65 abuts against the outer surface of the housing 21 and is configured to cooperate with the first supporting part 63 to support the cleaning part 6 to rotate on the housing 21. For specific details, reference can be made to the description in the first embodiment above, and details will not be elaborated here.

[0095] In some embodiments, in order to facilitate the user to directly observe the usage state of the filter element 2 in the filter bottle 3 and replace the filter element 2 in a timely manner under the condition of poor water quality, the filter bottle 3 is of a transparent structure or a semi - transparent structure.

[0096] Specifically, since the filter bottle 3 is made of transparent or semi - transparent material, when in use, the user can directly observe the state of the filter element 2 in the filter bottle 3, and thus, under the condition of poor water quality, the replacement cycle of the filter element 2 can be shortened.

[0097] Embodiment 3, in another embodiment of the present application, for the connection main body, it can be of an integral structure. For the convenience of processing, the connection main body can also adopt a split structure, which will be described below with reference to the accompanying drawings.

[0098] As Figure 7As shown, the connection body 1 includes a first connector 15 and a second connector 16. The first connector 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 connector 16. The second connector 16 is provided with a first connection port 13, a second connection port 14 and a sewage connecting pipe 17. The first connector 15 and the second connector 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.

[0099] Specifically, for the connection 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 connector 15, and the sewage connecting pipe 17 is provided on the second connector 16.

[0100] In order to meet the requirements of water inlet and water outlet inside the connection body 1 and meet the installation design requirements of structural compactness and miniaturization, the following structural improvements are made to the connection body 1.

[0101] The first connector 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. A communication port 163 is provided on the second connector 16, and the communication port 163 communicates with the installation cavity.

[0102] The pre-treatment water treatment device further includes an intermediate pipe 4. The intermediate pipe 4 is arranged in the water inlet connecting pipe 11. The outer end of the intermediate pipe 4 is hermetically 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 163 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 163. The inner pipe orifice of the intermediate pipe 4 communicates with the water inlet cavity.

[0103] Specifically, for the first connector 15, its overall structure is a three-way pipe, and correspondingly, the water inlet connecting pipe 11 and the water outlet connecting pipe 12 are formed. The other pipe orifice of the three-way pipe will form the auxiliary connecting pipe 153 to be connected with the communication port 163 of the second connector 16 through the auxiliary connecting pipe 153.

[0104] For the water inlet connecting pipe 11 and the water outlet connecting pipe 12 on the first connecting piece 15, they need to meet the requirements of water inlet and outlet. By arranging an 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 connecting piece 15 is of a three-way pipe structure, so that the auxiliary flow channel 111 communicates with the water outlet connecting pipe 12. After the first connecting piece 15 is connected to the second connecting piece 16, the auxiliary connecting pipe 153 is connected to the communication port 163, so that the auxiliary flow channel 111 communicates with the water outlet cavity through the communication port 163. At the same time, the pipe orifice at the inner end of the intermediate pipe 4 extends into the installation cavity of the second connecting piece 16 through the auxiliary connecting pipe 153 and the communication port 163 to communicate with the water inlet cavity.

[0105] The intermediate pipe 4 is used to form an auxiliary flow channel 111 in the water inlet connecting pipe 11 to meet the communication requirements between the water outlet connecting pipe 12 and the water outlet cavity, making the overall structure of the first connecting piece 15 more compact and small, thus meeting the design requirements of miniaturization.

[0106] The water distributor 5 arranged in the installation cavity of the second connecting piece 16 is used to separate the water outlet cavity and the water inlet cavity in the installation cavity of the second connecting piece 16. A protruding annular spacer 51 is arranged on the annular part on one side of the communication port 163, so that the water inlet cavity and the water outlet cavity are separated in the installation cavity of the second connecting piece 16.

[0107] 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 163 is arranged on the plug-in part 54, and 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.

[0108] 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 plug-in part 54 cooperate with each other so that the inner port of the intermediate pipe 4 can be isolated from the water outlet cavity, thus meeting the effective isolation between the water inlet cavity and the water outlet cavity.

[0109] In addition, by configuring the plug-in part 54 on the annular part, it can better meet the flow requirements of the water outlet water by borrowing the internal flow channel of the water inlet connecting pipe 12. At the same time, during the overall assembly of the pre-treatment water treatment equipment, it is convenient to effectively connect the inner end of the intermediate pipe 4 to the water inlet cavity while effectively isolating it from the water outlet cavity, facilitating the quick and accurate assembly of the pre-treatment water treatment equipment.

[0110] In order to further increase the space at the water inlet of the water outlet connecting pipe 12, a concave structure 41 can also be provided on the intermediate pipe 4. The concave structure 41 is arranged opposite to the water inlet of the water outlet connecting pipe 12. In this way, the water collected and sent by the auxiliary flow channel 111 can flow more smoothly into the water outlet connecting pipe 12 at the concave structure 41, so as to ensure the smooth flow of the water outlet flow.

[0111] 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 recorded 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-treatment water treatment device, characterized in that, it includes: a connection main body, the connection main body includes a first connection member and a second connection member detachably connected together, the first connection part is a three-way pipe, and the three end parts of the three-way pipe respectively form a water inlet connection pipe, a water outlet connection pipe and an auxiliary connection pipe. An installation cavity is formed in the second connection member, and a sewage connection pipe and a communication port communicating with the installation cavity are provided on the second connection member, and the auxiliary connection pipe is connected to the communication port; 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 cleaning component, the cleaning component is provided with a first water flow driving part and a first cleaning part; a filter bottle; an intermediate pipe; Wherein, the filter bottle and the filter element are arranged on the second connection member, and the filter bottle covers the filter element; the intermediate pipe is arranged in the water inlet connection pipe, and an auxiliary flow channel is formed between the outer wall of the intermediate pipe and the inner wall of the water inlet connection pipe. The water outlet connection pipe communicates with the outlet of the filter element through the auxiliary flow channel and the communication port, the water inlet of the water inlet connection pipe communicates with the inlet of the filter element through the intermediate pipe, and the sewage connection pipe communicates with the internal space of the filter bottle; The cleaning component is rotatably sleeved on the housing, the first water flow driving part is configured to be driven by water flow to drive the cleaning component to rotate on the housing, and the first cleaning part is configured to rotate with the cleaning component to scrape the filter net on the housing; The pre-treatment water treatment device is arranged horizontally as a whole.

2. The pre-treatment water treatment device according to claim 1, characterized in that, it further includes that the outer end of the intermediate pipe is hermetically connected to the inner wall of the water inlet connection pipe, the water inlet of the water inlet connection pipe communicates with the intermediate pipe, and the inner end of the intermediate pipe passes through the communication port and extends into the installation cavity.

3. The pre-treatment water treatment device according to claim 2, characterized in that, it further includes: 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; The water distributor is arranged in the installation cavity and forms a water inlet cavity with the filter bottle, and an outlet cavity is formed between the water distributor and the inner wall of the second connection member. The filter element and the cleaning component are arranged between the water distributor and the filter bottle; The intermediate pipe communicates with the inlet through the first water flow interface, the auxiliary flow channel communicates with the outlet through the second water flow interface, and the sewage connection pipe communicates with the internal space of the filter bottle through the third water flow interface.

4. The pre-treatment water treatment device according to claim 3, 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; a plurality of support columns are arranged on the end plate part, and the support columns are located in the outlet cavity and abut against the second connection member.

5. The pre-treatment water treatment device according to claim 4, characterized in that, The inner wall of the annular part is further provided with a diversion channel, which communicates with the first water flow interface, and the water outlet holes of the diversion channel face the first water flow driving part.

6. The pre-treatment water treatment device according to claim 4, wherein, One end of the cleaning component is provided with a first support part, which 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 support part.

7. The pre-treatment water treatment device according to claim 6, wherein, The first support part is of a sleeve structure, and a second water flow driving part is arranged on the outer surface of the first support part. 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 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 connecting pipe to drive the cleaning component to rotate.

8. The pre-treatment water treatment device according to claim 7, wherein, 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 arranged between the first support part and the cleaning component, and a water flow interval is formed between two adjacent connecting ribs, and the water flow interval is configured to output water flow towards the second water flow driving part.

9. The pre-treatment water treatment device according to claim 6, wherein, The other end of the cleaning component is provided with a second support part, which abuts against the outer surface of the housing and is configured to cooperate with the first support part to support the cleaning component to rotate on the housing.

10. A water heater, comprising a water tank, and a water inlet pipe and a water outlet pipe are arranged on the water tank, wherein, It further comprises the pre-treatment water treatment device according to any one of claims 1-9, and the water outlet connecting pipe of the pre-treatment water treatment device is connected to the water inlet pipe; a decorative cover is arranged on the water tank, and the decorative cover covers the front side of the pre-treatment water treatment device.

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