Filtering device and water heater

Abstract

The application relates to a filtering device and a water heater, which comprises a device shell provided with a filter cavity, a filter core water inlet, a filter core water outlet and a blowdown water outlet; a filter core assembly arranged in the filter cavity and comprising a framework and a filter body fixed in the framework; a first end of the framework is provided with a first sealing element to divide the filter cavity into a first filter cavity and a second filter cavity, the filter body is arranged in the first filter cavity, the first end of the framework is further provided with a first backwashing flow channel communicating the second filter cavity and the inside of the filter body, and a first water filtering flow channel communicating the first filter cavity and the second filter cavity; the filter core water inlet communicates with the second filter cavity, the filter core water outlet communicates with a water outlet end of the filter core assembly, and the blowdown water outlet communicates with the first filter cavity; a flow channel assembly is arranged at the first end of the filter core assembly and used for switching the first backwashing flow channel and the first water filtering flow channel; and a switching control element is in transmission connection with the flow channel assembly and used for controlling flow channel switching of the flow channel assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a filter device and a water heater. BACKGROUND

[0002] The filter is a device for filtering impurities in water, which can filter out some particulate matter, and has functions such as beautifying and skin care when used in daily washing and care. The filter is usually applied in the scenes of domestic water, public water, and even some industrial water.

[0003] During long-term use, the filter core is affected by the long-term accumulation of dirt on the filter core, for example, causing the filtering speed to slow down, being blocked, or being unable to filter, etc. This makes the service life of the filter core shorter, and the filter core needs to be replaced frequently, which increases the use cost.

[0004] In addition, the filter is also applied in some electrical appliances, for example, when a gas water heater is used alone, it has no filtering and purifying function, the content of mud, rust, and large particles is high, the hardness is large, the shower water quality is poor, and in some areas, water tank corrosion problems caused by poor water quality affect the service life of the gas water heater. Therefore, some existing water heaters use pre-filtering nets or activated carbon to filter and improve water quality. However, this filtering method has limited filtering effect and affects the water flow of the water heater, which is not conducive to the normal use of the water heater. In addition, some water heaters additionally install a filter at the front end of the water inlet for filtering. However, this method occupies a large installation space, and is more troublesome for ordinary users. SUMMARY

[0005] The present application provides a filter device and a water heater to solve the problem of short service life of the filter core of the existing filter device.

[0006] In a first aspect, the present application provides a filter device, comprising:

[0007] a device housing provided with a filter cavity, a filter core water inlet, a filter core water outlet, and a sewage water outlet;

[0008] a filter core assembly arranged in the filter cavity, comprising a skeleton and a filter body fixed in the skeleton, a first end of the skeleton is provided with a first sealing element to divide the filter cavity into a first filter cavity and a second filter cavity, the filter body is arranged in the first filter cavity, the first end of the skeleton is further provided with a first backwashing flow channel communicating the second filter cavity and the inside of the filter body, and a first water filtering flow channel communicating the first filter cavity and the second filter cavity, the filter core water inlet communicates with the second filter cavity, the filter core water outlet communicates with the water outlet end of the filter core assembly, and the sewage water outlet communicates with the first filter cavity;

[0009] A flow channel assembly is arranged at the first end of the filter element assembly, and is used to switch the first backwashing flow channel and the first water filtering flow channel.

[0010] A switching control member is in transmission connection with the flow channel assembly, and is used to control the flow channel switching of the flow channel assembly.

[0011] Further, the flow channel assembly comprises a flow channel member, a first water filtering sealing member and a first backwashing sealing member, the first water filtering sealing member is connected with the flow channel member, the flow channel member is provided with a flow channel water inlet connected with the filter element water inlet, a second backwashing flow channel and a second water filtering flow channel, the second water filtering flow channel is in communication with the flow channel water inlet, and the second backwashing flow channel is in communication with the second water filtering flow channel and the first backwashing flow channel.

[0012] The switching control member is used to control the movement of the flow channel member to seal the first backwashing flow channel and open the first water filtering flow channel, or to open the first backwashing flow channel and seal the first water filtering flow channel.

[0013] Further, the skeleton is provided with an auxiliary sealing part extending into the second backwashing flow channel, and the first backwashing sealing member is arranged on the auxiliary sealing part.

[0014] Further, a limiting gasket and a fixed pin are arranged on one side of the end of the auxiliary sealing part.

[0015] Further, the end of the flow channel member away from the filter body is provided with a driving surface, the switching control member is provided with a driving part corresponding to the driving surface, and the flow channel member is driven to move by rotating the switching control member.

[0016] Further, a first downward pressing spring is further arranged between the skeleton and the flow channel member.

[0017] Further, the switching control member is provided with a filter material cavity, a detachable charging assembly is arranged in the filter material cavity, and the filter material cavity is in communication with the second water filtering flow channel.

[0018] Further, a water stopping assembly is arranged between the second water filtering flow channel and the filter material cavity.

[0019] Further, the water stopping assembly comprises a movable water stopping plate arranged in the second water filtering flow channel, a water stopping sealing ring arranged on the outer periphery of the water stopping plate, and a second downward pressing spring arranged between the flow channel member and the water stopping plate, and the water stopping plate and the water stopping sealing ring are arranged corresponding to the opening of the filter material cavity.

[0020] In a second aspect, the application provides a water heater, comprising a water pump, a filtering water inlet pipe, a filtering water outlet pipe, a sewage water outlet pipe, a heat exchanger and the filtering device according to any one of the preceding claims.

[0021] The filtered water outlet pipe and the sewage outlet pipe are respectively provided with a filtered water control valve and a sewage control valve.

[0022] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0023] The filter device provided by the embodiment of the present application is characterized in that the filter cavity is divided into a first filter cavity and a second filter cavity, the filter body is arranged outside the first filter cavity, the first filter cavity and the second filter cavity are communicated through a first filtered water flow channel and are controllably sealed by a first filter sealing element, a first backwashing flow channel is arranged to the inside of the filter body and is communicated with the second filter cavity and controllably sealed by a first backwashing sealing element. The flow channel assembly can realize opening of the first filtered water flow channel or opening of the first backwashing flow channel under the control of the switching control element, so that the filtering or backwashing operation can be realized. The structure does not need to change the direction of the external water flow, and only needs to operate the switching control element to realize the operation. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without any creative labor.

[0026] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, and these exemplary illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings in the drawings do not constitute a proportional limitation.

[0027] Figure 1 The filter device structure schematic diagram provided by the embodiment of the present application is shown in the following figure:

[0028] Figure 2 The filter device structure schematic diagram provided by the embodiment of the present application is shown in the following figure: Figure 1 The E-E section structure schematic diagram provided by the embodiment of the present application is shown in the following figure:

[0029] Figure 3 The filter device structure schematic diagram (internal components) provided by the embodiment of the present application is shown in the following figure:

[0030] Figure 4 The skeleton structure schematic diagram provided by the embodiment of the present application is shown in the following figure:

[0031] Figure 5 The flow channel piece structure schematic diagram provided by the embodiment of the present application is shown in the following figure:

[0032] Figure 6 Switching control member structure schematic diagram provided for the embodiment of the present application;

[0033] Figure 7 Charging assembly cross-sectional structure schematic diagram provided for the embodiment of the present application;

[0034] Figure 8 Charging assembly structure schematic diagram provided for the embodiment of the present application;

[0035] Figure 9 Rotary scraper structure schematic diagram provided for the embodiment of the present application;

[0036] Figure 10 Water heater internal structure schematic diagram provided for the embodiment of the present application;

[0037] Figure 11 Water heater internal structure schematic diagram (another side) provided for the embodiment of the present application;

[0038] Figure 12 Water heater internal structure schematic diagram (side view) provided for the embodiment of the present application;

[0039] Figure 13 Water heater filtering process schematic diagram provided for the embodiment of the present application;

[0040] Figure 14 Water heater backwashing process schematic diagram provided for the embodiment of the present application;

[0041] Figure 15 Water heater forward flushing process schematic diagram provided for the embodiment of the present application.

[0042] Explanation of reference signs:

[0043] 1, bottom cover assembly 2, smoke exhaust assembly; 3, carbon monoxide concentration alarm; 4, heat exchanger; 5, first water outlet pipe assembly; 6, combustion chamber; 7, burner; 8, square pipe proportional valve assembly; 9, blowdown control valve; 10, filtered water control valve; 11, second water outlet pipe assembly; 12, power socket; 13, water outlet; 14, air inlet; 15, bottom decorative plate; 16, filtering device; 17, first water inlet assembly, 18, circulating water pump; 19, buckle; 20, second water inlet pipe assembly; 21, blowdown water outlet pipe; 22, 2-way PE elbow; 23, water inlet corrugated pipe assembly; 27, ignition needle;

[0044] 161, device housing; 162, rotary scraper; 163, filter body; 164, framework; 165, flow channel assembly; 166, water stop assembly; 167, charging assembly; 168, switching control member; 169, fixing pin;

[0045] 1610, filter cavity; 1613, filter element water inlet; 1614, filter element water outlet; 1615, blowdown water outlet; 16101, first filter cavity; 16102, second filter cavity;

[0046] 1641, first backwashing flow channel; 1642, first water filtering flow channel; 1643, auxiliary sealing part; 1648, filter element water outlet flow channel; 1649, filter body support;

[0047] 1651, flow channel piece; 1652, fixed bolt; 1653, limiting gasket; first backwashing sealing piece 1654; 1655, first downward pressing spring; 1656, first water filtering sealing piece; 16511, flow channel water inlet; 16512, second backwashing flow channel; 16513, second water filtering flow channel;

[0048] 1661, water stop sealing ring; 1662, water stop plate; 1663, second downward pressing spring;

[0049] 1671, dosing inner cover; 1672, medicine tablet; 1673, dosing outer cover; 1674, dosing pressing tablet; 1675, upward pressing spring;

[0050] 1680, filter material cavity; 1687, locking pin slot. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0052] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the components and arrangements of the specific examples are described in the following. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to the numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and it does not indicate the relationship between the various embodiments and / or arrangements discussed.

[0053] For the convenience of description, spatial relative terms can be used in the specification to describe the relative position relationship or movement condition of one element or feature with respect to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "below", "on", "above", "front", "back", and the like. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "above" another element or feature. Therefore, the example term "below" can include both up and down positions. The device can be additionally oriented (rotated by 90 degrees or in other directions) and the spatial relative relationship descriptors used in the specification are interpreted accordingly.

[0054] In order to solve the technical problems of short service life and high use cost of the filter element of the filtering device in the prior art, the application provides a filtering device, which can improve the service life of the filter element of the filtering device and reduce the use cost of the filtering device.

[0055] Figures 1-3 The filtering device provided by the embodiment of the application is shown, which comprises a device shell 161, a filter element assembly, a flow channel assembly 165, and a switching control member 168.

[0056] In the embodiment, the device shell 161 generally adopts a cylindrical shell structure and needs to bear a certain water pressure so that water can be filtered through the filter element assembly under the water pressure. The device shell 161 is provided with a filter cavity 1610, the filter element assembly and the flow channel assembly 165 are arranged in the filter cavity 1610, and the switching control member 168 is arranged outside the filter cavity 1610 and is rotatably and sealingly connected with the device shell 161 and is drivingly connected with the internal flow channel assembly so as to control the flow channel assembly from outside. The device shell 161 is further provided with a filter element water inlet 1613 and a filter element water outlet 1614, water to be filtered enters through the filter element water inlet 1613, is then filtered through the filter element assembly in the filter cavity 1610, and is then discharged through the filter element water outlet 1614. In the embodiment, the filter element assembly can realize backwashing, and therefore the device shell 161 is further provided with a blowdown water outlet 1615.

[0057] In the embodiment, the filter element assembly is the main component for realizing water filtration, and the filter element assembly is arranged in the filter cavity 1610 and comprises a skeleton 164 and a filter body 163 fixed in the skeleton 164. The filter body 163 can generally be a filter screen, a ceramic, and some filter bodies with a filtering function.

[0058] As shown in FIG. Figure 3 And 4 As shown in FIG. The structure of the skeleton 164 as a whole is adapted to the shape of the filter cavity 1610, which is a columnar structure. Specifically, the skeleton 164 includes: a filter body support 1649, a first backwashing flow channel 1641 arranged at the first end of the filter body support 1649, a filter core outlet water flow channel 1648 arranged at the second end of the filter body support 1649, and a first water filtering flow channel 1642 arranged at the outer periphery of the first end. The filter body support 1649 is a multi-layer groove structure, and a plurality of filter bodies 163 are fixedly embedded in the filter body support 1649 to form a filtering structure.

[0059] As shown in FIG. Figure 2 As shown in FIG. The first end of the skeleton 164 is further provided with a first sealing member 1640 to divide the filter cavity 1610 into a first filter cavity 16101 and a second filter cavity 16102. Specifically, the first sealing member 1640 can be arranged at the outer periphery of the structure forming the first water filtering flow channel 1642.

[0060] As shown in FIG. Figures 2-4 As shown in FIG. The filter body support 1649 and the filter body 163 are arranged in the first filter cavity 16101, the second filter cavity 16102 and the first backwashing flow channel 1641 are communicated, the first filter cavity 16101 and the second filter cavity 16102 are communicated through the first water filtering flow channel 1642, the filter core water inlet 1613 is communicated with the second filter cavity 16102, the filter core water outlet 1614 is communicated with the filter core outlet water flow channel 1648 of the filter core assembly, and the blowdown water outlet 1615 is communicated with the first filter cavity 16101.

[0061] When the filter core assembly is filtering, the first backwashing flow channel 1641 and the second filter cavity 16102 are closed, the first filter cavity 16101 and the second filter cavity 16102 are communicated through the first water filtering flow channel 1641, water enters the first filter cavity 16101 from the outside of the filter body 163 under pressure, and then is discharged through the filter core outlet water flow channel 1648, completing the filtering. When backwashing, the first water filtering flow channel 1642 between the first filter cavity 16101 and the second filter cavity 16102 is closed, and the first backwashing flow channel 1641 is opened and communicated with the first filter cavity 16101. Under the water pressure, the water in the second filter cavity 16102 enters the inside of the skeleton 164 through the first backwashing flow channel 1641, and is backwashed outwardly through the filter body 163. The sewage produced in the internal backwashing process is in the first filter cavity 16101, and the blowdown water outlet 1615 communicated with the first filter cavity 16101 can realize the discharge of the sewage formed by backwashing.

[0062] In this embodiment, the function of the flow channel assembly 165 is to guide the water entering the second filter chamber 16102, so that the water entering the second filter chamber 16102 enters the first filter chamber 16101 or enters the first backwash flow channel 1641. The flow channel assembly 165 is disposed at the first end of the filter element assembly. Under the control of the switching control unit 168, the first backwash flow channel 1641 is sealed and the first water filter flow channel 1642 is opened, or the first backwash flow channel 1641 is opened and the first water filter flow channel 1642 is sealed, so as to realize the switching of the first backwash flow channel 1641 and the first water filter flow channel 1642.

[0063] As a specific implementation method, such as Figure 3 As shown, the flow channel assembly 165 includes a flow channel component 1651, a first water filtration seal 1656, and a first backwash seal 1654. The first water filtration seal 1656 is connected to the flow channel component 1651, and the flow channel component 1651 and the first water filtration seal 1656 are an integral structure. Figure 5 As shown, the flow channel component 1651 is provided with a flow channel inlet 16511 connected to the filter element inlet 1613, a second backwash flow channel 16512 and a second filter flow channel 16513. The second filter flow channel 16513 is connected to the flow channel inlet 16511, the second backwash flow channel 16512 is connected to the second filter flow channel 16513, and the second backwash flow channel 16512 is connected to the second filter flow channel 16513 and the first backwash flow channel 1641.

[0064] For details, please refer to Figure 3 and Figure 4 As shown, the inner wall of the structure forming the first water filtration channel 1642 is provided with a sealing surface (not shown in the diagram) corresponding to the first water filtration seal 1656. Under the control of the switching control unit 168, the first water filtration seal 1656 can fit onto this sealing surface to form a seal on the first water filtration channel 1642. The first backwash seal 1654 is provided on the second backwash channel 16512, and works with the channel component 1651 to form a seal on the second backwash channel 16512.

[0065] As a specific embodiment for achieving the sealing of the first backwash seal 1654, refer to Figure 3 and Figure 4 As shown, the frame 164 is provided with an auxiliary sealing part 1643 extending into the second backwash channel 16512, and a first backwash seal 1654 is disposed on the auxiliary sealing part 1643. Under the control of the switching control unit 168, the first backwash seal 1654 disengages from the second backwash channel 16512 to achieve communication between the first backwash channel 1641 and the second filter channel 16513, or the first backwash seal 1654 enters the second backwash channel 16512 to form a seal, isolating the second filter channel 16513 from the first backwash channel 1641.

[0066] Furthermore, a limiting gasket 1653 and a fixing pin 1652 are provided on one side near the end of the auxiliary sealing part 1643. The limiting gasket 1653 is used to limit the first backwash seal 1654 on the auxiliary sealing part 1643, so as to prevent the first backwash seal 1654 from shifting and ensure its sealing reliability. At the same time, the fixing pin 1652 can fix the position of the limiting gasket 1653.

[0067] In this embodiment, as Figure 5 As shown, a driving surface 16514 is provided at the end of the flow channel component 1651 away from the filter body 163. Specifically, the driving surface 16514 is provided on the structure forming the second water filter flow channel 16513. The driving surface 16514 is a slope or curved surface with a gradually changing height, such as... Figure 6 As shown, the switching control member 168 is provided with a driving part 1681 corresponding to the driving surface 16514. The driving part 1681 is a protruding protrusion structure. By rotating the switching control member 168, the flow channel member 1651 is driven to move. Specifically, when the switching control member 168 rotates, the driving part 1681 slides on the driving surface 16514, thereby driving the flow channel member 1651 to move.

[0068] For further details, please refer to... Figure 3 As shown, a first compression spring 1655 is also provided between the skeleton 164 and the flow channel component 1651 to keep the flow channel component 1651 in tight contact with the switching control component 168, so that when the switching control component 168 rotates back to its original position, the flow channel component 1651 can also return to its original position with the first compression spring 1655.

[0069] In this embodiment, reference Figure 3 and Figure 6 As shown, the switching control unit 168 is also provided with a filter media chamber 1680, and a detachable chemical loading assembly 167 is provided inside the filter media chamber 1680. The filter media chamber 1680 is connected to the second water filtration channel 16513. Figure 7 and Figure 8As shown, the medicine loading assembly 167 comprises: a medicine loading inner cover 1671, a medicine loading outer cover 1673, a medicine loading pressing plate 1674, and an upper pressing spring 1675. The medicine loading outer cover 1673 is provided with a medicine loading inner cavity for placing a medicine tablet 1672. The medicine loading pressing plate 1674 and the upper pressing spring 1675 are arranged at the bottom of the medicine loading inner cavity, for generating an upward pressing force on the medicine tablet. The medicine tablet is pressed in the medicine loading inner cavity by the medicine loading inner cover 1671. The medicine loading inner cover 1671 and the medicine loading outer cover 1673 are connected by a rotating buckle. The bottom of the filter material cavity 1680 is penetrated. The medicine loading assembly 167 can be loaded into the filter material cavity 1680 from the bottom of the switching control member 168, connected by a thread, and sealed by a sealing member. In a normal use state, when water enters from the flow channel member 1651, it enters the filter material cavity 1680 through the second water filtering flow channel 16513, contacts the medicine tablet, and thus improves the water quality. In this embodiment, the medicine tablet 1672 can be a single medicine tablet or a combination of different medicine tablets, such as scale inhibitor, strontium, mineralization, VC, etc., so as to soften the water quality, enrich the water quality with strontium, mineralize, etc.

[0070] Since the bottom of the filter material cavity 1680 is penetrated, in order to avoid water from flowing out of the second water filtering flow channel 16513 during the medicine replacement process, the medicine loading assembly 167 needs to be removed. As shown, Figure 3 In this embodiment, a water stopping assembly 166 is arranged between the second water filtering flow channel 16513 and the filter material cavity 1680. When the medicine loading assembly 167 is removed, the water stopping assembly 166 seals the filter material cavity 1680, so as to avoid water from flowing out of the filter material cavity 1680.

[0071] As a specific embodiment, the water stopping assembly 166 comprises: a water stopping plate 1662 movably arranged in the second water filtering flow channel 16513, a water stopping sealing ring 1661 arranged on the outer periphery of the water stopping plate 1662, and a second lower pressing spring 1663 arranged between the flow channel member 1651 and the water stopping plate 1662. The water stopping plate 1662 and the water stopping sealing ring 1661 are arranged corresponding to the opening of the filter material cavity 1680. When the medicine loading assembly 167 is removed, the water stopping plate 1662 moves towards the filter material cavity 1680 under the action of the second lower pressing spring 1663, covers the opening of the filter material cavity 1680, and is sealed under the action of the water stopping sealing ring 1661. After the medicine loading assembly 167 is loaded, the medicine loading assembly 167 lifts up the water stopping plate 1662, so as to make the filter material cavity 1680 communicate with the second water filtering flow channel 16513, and thus realize the process that the medicine loading assembly 167 contacts the entering water.

[0072] As shown, Figure 9 In order to further improve the cleaning effect of the dirt on the outside of the filter body 163, a rotating scraper 162 is further arranged on the outer periphery of the framework 164 in this embodiment, for scraping off the dirt on the outer surface of the filter body 163.

[0073] In combinationFigure 1 and Figure 6 As shown, to ensure the reliability of the connection of the switching control component 168, a locking pin groove 1687 is provided on the outer periphery of the connection between the switching control component 168 and the device housing 161. A fixing pin 169, which passes through the device housing 161 and into the locking pin groove 1687, also connects the switching control component 168 and the device housing 161. The fixing pin 169 can fix the axial position of the switching control component 168, but allows the switching control component 168 to maintain its rotational function. After prolonged use, when backwashing is no longer sufficient to clean the dirt inside the filter element, the switching control component 168 can be removed by pulling out the fixing pin 169. This allows the internal flow channel component 1651 and the frame 164 to be disassembled and cleaned together, and the filter element 163 on the frame 164 can be cleaned or replaced.

[0074] Based on the above embodiments, as a specific application of the filtration device, such as Figures 10-12 As shown, this application also provides a specific embodiment of a water heater device, which includes: a water pump 18, a filter inlet pipe 20, a filter outlet pipe 24, a sewage outlet pipe 21, a heat exchanger 4, and a filter device 16 as described in the above embodiment; the filter outlet pipe 24 and the sewage outlet pipe 21 are respectively provided with a filter water control valve 10 and a sewage control valve 9.

[0075] Furthermore, the water heater also includes: bottom cover assembly 1, smoke exhaust assembly 2, carbon monoxide concentration alarm 3, first water outlet pipe assembly 5, combustion chamber 6, burner 7, square tube proportional valve assembly 8, second water outlet pipe assembly 11, power socket 12, water outlet 13, air inlet 14, bottom decorative panel 15, first water inlet assembly 17, buckle 19, second water inlet pipe assembly 20, 2-point PE elbow 22, water inlet corrugated pipe assembly 23, ignition needle 27, etc.

[0076] like Figure 13 The diagram shown is a simplified illustration of the water filtration system 16 filtering water during normal use of the water heater. Figures 1-12 Tap water enters the water heater through the water pump 18, is introduced into the filter device 16 through the filter inlet pipe 20, is introduced into the heat exchanger 4 through the filter outlet pipe 24, and is cleaned and drained through the drain outlet pipe 21. During normal filtration, the drain control valve 9 remains closed and the filter control valve 10 remains open. The water filtered by the filter device 16 is introduced into the heat exchanger 4 for heat exchange and finally flows out to the user through the outlet 13.

[0077] like Figure 14 The diagram shown is a simplified illustration of a water heater's backwashing filter device. Figures 1-12 During backwashing, the drain control valve 9 remains open and the filter control valve 10 remains closed, and the wastewater generated during backwashing is directly discharged through the drain outlet pipe 21.

[0078] As shown in Figure 15 The simple schematic diagram of the water heater in the process of washing the filter device is shown, in combination with Figures 1-12 During the washing process, the blowdown control valve 9 remains in the open state, and the filtered water control valve 10 remains in the closed state. The sewage formed by backwashing is directly discharged through the blowdown water outlet pipe 21.

[0079] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0080] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0081] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0082] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0083] In the present application, unless specifically defined otherwise, the expression "on" or "under" of a first feature with respect to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the expression "on", "above" and "over" of a first feature with respect to a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The expression "under", "below" and "underneath" of a first feature with respect to a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0084] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, a person skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0085] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, any modifications and variations of the present application that fall within the scope of the claims of the present application and their equivalents are intended to be included in the present application.

[0086] The above is a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A filter device, characterized in that The device comprises: a device housing (161) provided with a filter cavity (1610), a filter core water inlet (1613), a filter core water outlet (1614), and a blowdown water outlet (1615); a filter core assembly arranged in the filter cavity (1610) and comprising a skeleton (164) and a filter body (163) fixed in the skeleton (164), a first end of the skeleton (164) is provided with a first sealing member (1640) to divide the filter cavity (1610) into a first filter cavity (16101) and a second filter cavity (16102), the filter body (163) is arranged in the first filter cavity (16101), the first end of the skeleton (164) is further provided with a first backwashing flow channel (1641) communicating the second filter cavity (16102) and the inside of the filter body (163), and a first filtered water flow channel (1642) communicating the first filter cavity (16101) and the second filter cavity (16102), the filter core water inlet (1613) communicates with the second filter cavity (16102), the filter core water outlet (1614) communicates with the water outlet end of the filter core assembly, and the blowdown water outlet (1615) communicates with the first filter cavity (16101); a flow channel assembly (165) arranged at the first end of the filter core assembly and used for switching the first backwashing flow channel (1641) and the first filtered water flow channel (1642); a switching control member (168) in transmission connection with the flow channel assembly (165) and used for controlling the flow channel switching of the flow channel assembly (165); wherein the flow channel assembly (165) comprises a flow channel member (1651), a first filtered water sealing member (1656), and a first backwashing sealing member (1654), the first filtered water sealing member (1656) is connected with the flow channel member (1651), the flow channel member (1651) is provided with a flow channel water inlet (16511) connected with the filter core water inlet (1613), a second backwashing flow channel (16512), and a second filtered water flow channel (16513), the second filtered water flow channel (16513) communicates with the flow channel water inlet (16511), and the second backwashing flow channel (16512) communicates the second filtered water flow channel (16513) and the first backwashing flow channel (1641); the switching control member (168) is used for controlling the movement of the flow channel member (1651) to seal the first backwashing flow channel (1641) and open the first filtered water flow channel (1642), or to open the first backwashing flow channel (1641) and seal the first filtered water flow channel (1642); the switching control member (168) is provided with a filter material cavity (1680), a detachable charging assembly (167) is arranged in the filter material cavity (1680), and the filter material cavity (1680) communicates with the second filtered water flow channel (16513).

2. The filter device of claim 1, wherein, The skeleton (164) is provided with an auxiliary sealing portion (1643) extending into the second backwashing flow channel (16512), and the first backwashing sealing member (1654) is arranged on the auxiliary sealing portion (1643).

3. The filter device of claim 2, wherein, A limiting gasket (1653) and a fixing bolt (1652) are arranged at the end of the auxiliary sealing part (1643).

4. The filter device of claim 2, wherein, The flow channel member (1651) is provided with a driving surface (16514) at the end away from the filter body (163), and the switching control member (168) is provided with a driving part (1681) corresponding to the driving surface (16514), and the flow channel member (1651) is driven to move by rotating the switching control member (168).

5. The filter device of claim 1, wherein, A first pressing spring (1655) is further arranged between the skeleton (164) and the flow channel member (1651).

6. The filter device of claim 1, wherein, A water stopping assembly (166) is arranged between the second water filtering flow channel (16513) and the filter material cavity (1680).

7. The filter device of claim 6, wherein, The water stopping assembly (166) comprises a water stopping plate (1662) movably arranged in the second water filtering flow channel (16513), a water stopping sealing ring (1661) arranged at the outer periphery of the water stopping plate (1662), and a second pressing spring (1663) arranged between the flow channel member (1651) and the water stopping plate (1662), and the water stopping plate (1662) and the water stopping sealing ring (1661) are arranged corresponding to the opening of the filter material cavity (1680).

8. A water heater, characterized by The filter device comprises: a water pump (18), a filtering water inlet pipe (20), a filtering water outlet pipe (24), a sewage water outlet pipe (21), a heat exchanger (4), and the filter device as claimed in any one of claims 1-7; the filtering water outlet pipe (24) and the sewage water outlet pipe (21) are respectively provided with a filtering water control valve (10) and a sewage control valve (9).

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