Filtering device and water heater

Abstract

The invention relates to a filtering device and a water heater, and the filtering device comprises a device shell which is provided with a filter cavity, a filter element water inlet, a filter element water outlet and a sewage discharge water outlet; the filter element assembly is arranged in the filter cavity and comprises a framework and a filter body fixed in the framework, a first sealing piece is arranged at the first end of the framework and divides the filter cavity into a first filter cavity and a second filter cavity, the filter body is arranged in the first filter cavity, and the first end of the framework is further provided with a first backwashing flow channel communicated with the second filter cavity and the interior of the filter body; the first filter cavity is communicated with the second filter cavity, the filter element water inlet is communicated with the second filter cavity, the filter element water outlet is communicated with the water outlet end of the filter element assembly, and the pollution discharge water outlet is communicated with the first filter cavity; the flow channel assembly is arranged at the first end of the filter element assembly and is used for switching a first backwashing flow channel and a first water filtering flow channel; and the switching control piece is in transmission connection with the runner assembly and is used for controlling runner switching of the runner assembly.

Description

Technical Field

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

[0002] A filter is a device used to filter impurities in water. It can filter out some particulate matter and has beauty and skin care functions when used for daily washing and care. Filters are usually used in household water, public water and even some industrial water scenarios.

[0003] During long-term use of the filter, the dirt on the filter element will accumulate for a long time and affect the filtering effect of the filter element, such as slowing down the filtering speed, blocking or failing to filter, etc. This will shorten the service life of the filter element and require frequent replacement of the filter element, which will increase the cost of use.

[0004] In addition, filters are also used in some electrical appliances. For example, when a gas water heater is used alone, it has no filtering and purification function, and contains a lot of silt, rust, and large particles, and has high hardness. The shower water quality is poor. In some areas, the poor water quality causes corrosion of water tanks and other problems, which affects the service life of the gas water heater. Therefore, some existing water heaters use a pre-coarse filter or activated carbon to filter and improve the water quality. However, this filtering method has limited filtering effect and will affect the water flow rate of the water heater, which is not conducive to the normal use of the water heater. In addition, there are also additional filters installed at the front end of the water inlet of the water heater for filtering. However, this method causes the equipment installation space to occupy a large area, and at the same time, it is more troublesome for ordinary users to operate. Summary of the invention

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

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

[0007] The device housing is provided with a filter chamber, a filter element water inlet, a filter element water outlet and a sewage outlet;

[0008] A filter element assembly is arranged in the filter cavity, comprising a frame and a filter body fixed in the frame, a first seal is arranged at the first end of the frame to separate the filter cavity into a first filter cavity and a second filter cavity, the filter body is arranged in the first filter cavity, a first backwash flow channel connecting the second filter cavity and the inside of the filter body is also arranged at the first end of the frame, and a first water filtration flow channel connecting the first filter cavity and the second filter cavity is arranged, the water inlet of the filter element is connected to the second filter cavity, the water outlet of the filter element is connected to the water outlet end of the filter element assembly, and the sewage outlet is connected to the first filter cavity;

[0009] A flow channel assembly, disposed at the first end of the filter element assembly, for switching between the first backwash flow channel and the first water filtering flow channel;

[0010] The switching control member is transmission-connected to the flow channel assembly and is used to control the flow channel switching of the flow channel assembly.

[0011] Further, the flow channel assembly includes a flow channel member, a first water filter seal and a first backwash seal, the first water filter seal is connected to the flow channel member, the flow channel member is provided with a flow channel water inlet connected to the filter element water inlet, a second backwash flow channel and a second water filter flow channel, the second water filter flow channel is connected to the flow channel water inlet, and the second backwash flow channel is connected to the second water filter flow channel and the first backwash flow channel;

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

[0013] Furthermore, the skeleton is provided with an auxiliary sealing portion extending into the second backwash flow channel, and the first backwash seal is arranged on the auxiliary sealing portion.

[0014] Furthermore, a limiting gasket and a fixing pin are arranged near one side of the end of the auxiliary sealing portion.

[0015] Furthermore, a driving surface is provided at one end of the flow channel component away from the filter body, and the switching control component is provided with a driving portion corresponding to the driving surface, and the flow channel component is driven to move by rotating the switching control component.

[0016] Furthermore, a first downward pressure spring is arranged between the skeleton and the flow channel component.

[0017] Furthermore, the switching control component is provided with a filter material cavity, a detachable medicine charging assembly is provided in the filter material cavity, and the filter material cavity is communicated with the second water filtering channel.

[0018] Furthermore, a water-stop component is provided between the second water filtering channel and the filter material cavity.

[0019] Furthermore, the water stop assembly includes: a water stop plate movably arranged in the second water filter channel, a water stop sealing ring arranged on the outer periphery of the water stop plate, and a second downward pressure spring arranged between the channel member and the water stop plate, and the water stop plate and the water stop sealing ring are arranged corresponding to the opening of the filter material cavity.

[0020] In a second aspect, the present application provides a water heater, comprising: a water pump, a filter water inlet pipe, a filter water outlet pipe, a sewage outlet pipe, a heat exchanger, and a filter device as claimed in any one of claims 1 to 4;

[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 in the embodiment of the present application has a filter chamber divided into a first filter chamber and a second filter chamber, the outside of the filter body is arranged in the first filter chamber, the first filter chamber and the second filter chamber are connected through a first filter channel, and a first filter seal is provided for controllable sealing, and a first backwash channel is provided to the inside of the filter body, which is connected to the second filter chamber and is controllably sealed by a first backwash seal. The channel assembly can realize the opening of the first filter channel or the first backwash channel under the control of the switching control component, thereby realizing the operation of filtering or backwashing. This structure does not need to change the direction of the external water flow, and can be realized by operating the switching control component. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0027] Figure 1 A schematic diagram of the structure of the filtering device provided in the embodiment of the present application;

[0028] Figure 2 for Figure 1 Schematic diagram of the EE cross-section structure;

[0029] Figure 3 A schematic diagram of the structure of the filter device (internal components) provided in the embodiment of the present application;

[0030] Figure 4 A schematic diagram of the skeleton structure provided in the embodiment of the present application;

[0031] Figure 5 A schematic diagram of the flow channel structure provided in an embodiment of the present application;

[0032] Figure 6 A schematic diagram of the structure of a switching control element provided in an embodiment of the present application;

[0033] Figure 7 A schematic diagram of the cross-sectional structure of a charge assembly provided in an embodiment of the present application;

[0034] Figure 8 A schematic diagram of the structure of a charge assembly provided in an embodiment of the present application;

[0035] Fig. 9 A schematic diagram of the structure of a rotating scraper provided in an embodiment of the present application;

[0036] Fig.10 A schematic diagram of the internal structure of a water heater provided in an embodiment of the present application;

[0037] Fig.11 A schematic diagram of the internal structure of a water heater provided in an embodiment of the present application (the other side);

[0038] Fig.12 A schematic diagram of the internal structure of a water heater provided in an embodiment of the present application (side view);

[0039] Fig.13 A schematic diagram of the water heater filtering process provided in an embodiment of the present application;

[0040] Fig.14 A schematic diagram of a backwashing process of a water heater provided in an embodiment of the present application;

[0041] Fig.15 A schematic diagram of the positive flushing process of a water heater provided in an embodiment of the present application.

[0042] Description of reference numerals:

[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 tube proportional valve assembly; 9. Drain 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. Filter device; 17. First water inlet assembly, 18. Circulating water pump; 19. Buckle; 20. Second water inlet pipe assembly; 21. Drain outlet pipe; 22. 2-point PE elbow; 23. Water inlet bellows assembly; 27. Ignition needle;

[0044] 161. Device housing; 162. Rotating scraper; 163. Filter body; 164. Frame; 165. Flow channel assembly; 166. Water stop assembly; 167. Charge assembly; 168. Switching control member; 169. Fixing pin;

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

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

[0047] 1651, flow channel member; 1652, fixing latch; 1653, limiting gasket; first backwash seal 1654; 1655, first downward pressure spring; 1656, first water filter seal; 16511, flow channel water inlet; 16512, second backwash flow channel; 16513, second water filter flow channel;

[0048] 1661, water stop seal ring; 1662, water stop plate; 1663, second downward pressure spring;

[0049] 1671, medicine adding inner cover; 1672, tablets; 1673, medicine adding outer cover; 1674, medicine adding tablet pressing; 1675, upper pressing spring;

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

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0052] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0053] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. 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 figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

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

[0055] Figure 1-3 A filtering device provided in an embodiment of the present application is shown, including: a device housing 161, a filter element assembly, a flow channel assembly 165 and a switching control component 168.

[0056] In this embodiment, the device housing 161 generally adopts a cylindrical housing structure and needs to withstand a certain water pressure so that water can be filtered through the filter element assembly under the water pressure. The device housing 161 is provided with a filter chamber 1610, and the filter element assembly and the flow channel assembly 165 are arranged in the filter chamber 1610. The switching control member 168 is arranged outside the filter chamber 1610, and is rotatably sealed and connected to the device housing 161, and is transmission-connected to the internal flow channel assembly to realize external control of the flow channel assembly. The device housing 161 is also provided with a filter element water inlet 1613 and a filter element water outlet 1614. The water to be filtered enters through the filter element water inlet 1613, and then is filtered through the filter element assembly in the filter chamber 1610, and then is discharged through the filter element water outlet 1614. In this embodiment, the filter element assembly can achieve backwashing, so the device housing 161 is also provided with a sewage outlet 1615.

[0057] In this embodiment, the filter element assembly is the main component for achieving water filtration. The filter element assembly is arranged in the filter cavity 1610, and includes a skeleton 164 and a filter body 163 fixed in the skeleton 164. The filter body 163 can generally be a filter mesh, ceramics, and some filter bodies with filtering functions.

[0058] Combined with the picture Figure 3 and 4 As shown, the overall structure of the skeleton 164 is adapted to the shape of the filter chamber 1610 and is a columnar structure. Specifically, the skeleton 164 includes: a filter support 1649, a first backwash flow channel 1641 disposed at the first end of the filter support 1649, a filter element outlet flow channel 1648 disposed at the second end of the filter support 1649, and a first water filter flow channel 1642 disposed at the periphery of the first end. The filter support 1649 is a multi-layer trough structure, and a plurality of filters 163 are fixedly embedded in the filter support 1649 to form a filtering structure.

[0059] Combination Figure 2 As shown, a first seal 1640 is also provided at the periphery of the first end of the skeleton 164 to separate the filter chamber 1610 into a first filter chamber 16101 and a second filter chamber 16102 . Specifically, the first seal 1640 can be provided at the periphery of a structure forming a first water filter channel 1642 .

[0060] Combination Figure 2-4 As shown, the filter body bracket 1649 and the filter body 163 are arranged in the first filter chamber 16101, the second filter chamber 16102 is connected to the first backwash channel 1641, the first filter chamber 16101 and the second filter chamber 16102 are connected through the first water filtration channel 1642, the filter element water inlet 1613 is connected to the second filter chamber 16102, the filter element water outlet 1614 is connected to the filter element water outlet channel 1648 of the filter element assembly, and the sewage outlet 1615 is connected to the first filter chamber 16101.

[0061] When the filter element assembly is filtering, the first backwash channel 1641 and the second filter chamber 16102 are closed, and the first filter chamber 16101 and the second filter chamber 16102 are connected through the first water filtration channel 1641. Water enters the first filter chamber 16101 from the second filter chamber 16102, enters from the outside of the filter body 163 under pressure, and is then discharged from the filter element outlet channel 1648 to complete the filtration. During backwashing, the first water filtration channel 1642 between the first filter chamber 16101 and the second filter chamber 16102 is closed, and the first backwash channel 1641 is opened and connected to the first filter chamber 16101. Under water pressure, the water in the second filter chamber 16102 enters the interior of the skeleton 164 through the first backwash channel 1641, and is backwashed outward through the filter body 163. The sewage generated during the internal backwashing process is in the first filter chamber 16101. The sewage outlet 1615 is connected to the first filter chamber 16101 to discharge the sewage generated 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 channel 1641. The flow channel assembly 165 is arranged at the first end of the filter element assembly. Under the control of the switching control component 168, the first backwash channel 1641 is sealed and the first water filtration channel 1642 is opened, or the first backwash channel 1641 is opened and the first water filtration channel 1642 is sealed, so as to realize the switching of the first backwash channel 1641 and the first water filtration channel 1642.

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

[0064] Specifically, refer to Figure 3 and Figure 4 As shown, the inner wall of the structure forming the first water filter flow channel 1642 is provided with a sealing surface corresponding to the first water filter seal 1656, which is not shown in the figure. Under the control of the switching control member 168, the first water filter seal 1656 can be attached to the sealing surface to form a seal for the first water filter flow channel 1642. The first backwash seal 1654 is provided on the second backwash flow channel 16512, and cooperates with the flow channel member 1651 to form a seal for the second backwash flow channel 16512.

[0065] As a specific implementation method for achieving the sealing of the first backwash seal 1654, refer to Figure 3 and Figure 4 As shown, the skeleton 164 is provided with an auxiliary sealing portion 1643 extending into the second backwash flow channel 16512, and the first backwash seal 1654 is provided on the auxiliary sealing portion 1643. Under the control of the switching control member 168, the first backwash seal 1654 is separated from the second backwash flow channel 16512 to achieve the communication between the first backwash flow channel 1641 and the second water filtering flow channel 16513, or the first backwash seal 1654 enters the second backwash flow channel 16512 to form a seal, and separates the second water filtering flow channel 16513 from the first backwash flow channel 1641.

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

[0067] In this embodiment, if Figure 5 As shown, the end of the flow channel member 154 away from the filter body 163 is provided with a driving surface 16514. Specifically, the driving surface 16514 is provided on the structure forming the second water filtering flow channel 16513. The driving surface 16514 is a highly gradient inclined surface or curved surface, such as Figure 6 As shown, the switching control member 168 is provided with a driving portion 1681 corresponding to the driving surface 16514. The driving portion 1681 is a protruding convex structure, which drives the flow channel member 154 to move by rotating the switching control member 168. Specifically, when the switching control member 168 rotates, the driving portion 1681 slides on the driving surface 16514, thereby driving the flow channel member 154 to move.

[0068] For further information, please refer to Figure 3 As shown, a first downward pressure spring 1655 is also provided between the skeleton 164 and the flow channel member 165 to maintain the close contact between the flow channel member 165 and the switching control member 168, so that when the switching control member 168 rotates to return to its original position, the flow channel member 165 can also return to its original position under the first downward pressure spring 1655.

[0069] In this embodiment, reference Figure 3 and Figure 6 As shown, the switch control member 168 is also provided with a filter cavity 1680, in which a detachable medicine charging assembly 167 is provided, and the filter cavity 1680 is connected with the second water filtering channel 16513. Figure 7 and Figure 8As shown, the medicine loading assembly 167 includes: a medicine loading inner cover 1671, a medicine loading outer cover 1673, a medicine loading tablet 1674 and an upward pressure spring 1675. The medicine loading outer cover 1673 is provided with a medicine loading inner cavity for placing tablets 1672. The medicine loading tablet 1674 and the upward pressure spring 1675 are arranged at the bottom of the medicine loading inner cavity, and are used to generate upward pressure on the tablets. The medicine loading inner cover 1671 is used to press the tablets in the medicine loading inner cavity. The medicine loading inner cover 1671 and the medicine loading outer cover 1673 can be connected by a rotating buckle. The bottom of the filter material cavity 1680 is penetrated, and 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 threads, and provided with a sealing member for sealing (not shown in the figure). Under normal use, when water enters from the flow channel 165, it enters the filter material cavity 1680 through the second water filter flow channel 16513 and contacts the tablets, thereby improving the water quality. In this embodiment, the tablets 1672 can be a single tablet such as scale inhibitor, strontium enrichment, mineralization, VC, etc., or a combination of different tablets, thereby softening the water quality, enriching the water with strontium, mineralizing, etc.

[0070] Since the bottom of the filter material chamber 1680 is through, in order to prevent water from flowing out of the second filter water flow channel 16513 during the drug change process, the drug loading assembly 167 needs to be removed. Figure 3 As shown, in this embodiment, a water stop assembly 166 is provided between the second water filter channel 16513 and the filter material cavity 1680. When the medicine charging assembly 167 is removed, the water stop assembly 166 will close the filter material cavity 1680, thereby preventing water from flowing out of the filter material cavity 1680.

[0071] As a specific implementation, the water stop assembly 166 includes: a water stop plate 1662 movably arranged in the second water filter channel 16513, a water stop seal ring 1661 arranged on the outer periphery of the water stop plate 1662, and a second downward pressure spring 1663 arranged between the channel member 165 and the water stop plate 1662, and the water stop plate 1662 and the water stop seal ring 1661 are arranged corresponding to the opening of the filter material cavity 1680. When the medicine charging assembly 167 is removed, under the action of the second downward pressure spring 1663, the water stop plate 1662 moves toward the direction of the filter material cavity 1680, and the water stop plate 1662 covers the opening of the filter material cavity 1680, and is sealed under the action of the water stop seal ring 1661. After the medicine-charging assembly 167 is loaded, the medicine-charging assembly 167 will lift up the water stop plate 1662, so that the filter cavity 1680 is connected with the second water filtering channel 16513, thereby realizing the process of the medicine-charging assembly 167 contacting the incoming water.

[0072] like Fig. 9 As shown, 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 provided on the periphery of the skeleton 164 in this embodiment to scrape off the dirt on the outer surface of the filter body 163.

[0073] Combination Figure 1 and Figure 6 As shown, in order to ensure the connection reliability of the switching control member 168, a locking pin groove 1687 is provided on the outer periphery of the connection portion between the switching control member 168 and the device housing 161, and a fixing pin 169 is also passed between the switching control member 168 and the device housing 161, which is inserted from the outside of the device housing 161 into the locking pin groove 1687. The fixing pin 169 can fix the axial position of the switching control member 168, but allows the switching control member 168 to maintain the rotation function. After long-term use, when backwashing can no longer effectively clean the dirt in the filter element, the switching control member 168 can be removed by pulling out the fixing pin 169, so that the internal flow channel member 165 and the skeleton 164 can be disassembled together for cleaning, and the filter body 163 on the skeleton 164 can be cleaned or replaced.

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

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

[0076] like Fig.13 The figure shows a simplified schematic diagram of the filter device 16 filtering water when the water heater is in normal use. Figure 1-12 The 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 discharged through the sewage outlet pipe 21. During normal filtration, the sewage control valve 9 remains in a closed state, and the water filter control valve 10 remains in a normally open state. The water filtered by the filter device 16 is introduced into the heat exchanger 4 for heat exchange, and finally flows out through the outlet 13 for the user.

[0077] like Fig.14 The figure shows a simplified schematic diagram of the backwash filter device of the water heater, combined with Figure 1-12 During backwashing, the sewage control valve 9 remains in an open state, the filter water control valve 10 remains in a closed state, and the sewage formed by backwashing is directly discharged through the sewage outlet pipe 21.

[0078] like Fig.15 The figure shows a simplified schematic diagram of a water heater flushing the filter device, combined with Figure 1-12 During positive flushing, the sewage control valve 9 remains in an open state, the filter water control valve 10 remains in a closed state, and the sewage formed by backwashing is directly discharged through the sewage outlet pipe 21.

[0079] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0080] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0081] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0082] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0083] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0085] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0086] The above is a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field 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 based on the protection scope of the claims.

Claims

1. A filtering device, characterized in that: include: The device housing (161) is provided with a filter chamber (1610), a filter element water inlet (1613), a filter element water outlet (1614) and a sewage outlet (1615); The filter element assembly is arranged in the filter cavity (1610), comprising a frame (164) and a filter body (163) fixed in the frame (164), a first seal (1640) is arranged at the first end of the frame (164) to separate 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), and a seal (1640) is arranged at the first end of the frame (164) to connect the first filter cavity (16101) and the second filter cavity (16102). The first backwash flow channel (1641) is provided inside the second filter chamber (16102) and the filter body (163), and a first water filtration flow channel (1642) is provided to connect the first filter chamber (16101) and the second filter chamber (16102), the filter element water inlet (1613) is connected to the second filter chamber (16102), the filter element water outlet (1614) is connected to the water outlet end of the filter element assembly, and the sewage outlet (1615) is connected to the first filter chamber (16101); A flow channel assembly (165), arranged at the first end of the filter element assembly, and used for switching between the first backwash flow channel (1641) and the first water filtering flow channel (1642); A switching control component (168) is transmission-connected to the flow channel assembly (165) and is used to control the flow channel switching of the flow channel assembly (165).

2. The filtering device according to claim 1, characterized in that: The flow channel assembly (165) comprises a flow channel component (1651), a first water filter seal (1656) and a first backwash seal (1654); the first water filter seal (1656) is connected to the flow channel component (1651); the flow channel component (1651) is provided with a flow channel water inlet (16511) connected to the filter element water inlet (1613), a second backwash flow channel (16512) and a second water filter flow channel (16513); the second water filter flow channel (16513) is connected to the flow channel water inlet (16511); the second backwash flow channel (16512) is connected to the second water filter flow channel (16513) and the first backwash flow channel (1641); The switching control member (168) is used to control the movement of the flow channel member (1651) to seal the first backwash flow channel (1641) and open the first water filtration flow channel (1642), or to open the first backwash flow channel (1641) and seal the first water filtration flow channel (1642).

3. The filtering device according to claim 2, characterized in that: The skeleton (164) is provided with an auxiliary sealing portion (1643) extending into the second backwash flow channel (16512), and the first backwash seal (1654) is arranged on the auxiliary sealing portion (1643).

4. The filtering device according to claim 3, characterized in that: A limiting gasket (1653) and a fixing pin (1652) are provided on one side adjacent to the end of the auxiliary sealing portion (1643).

5. The filtering device according to claim 3, characterized in that: A driving surface (16514) is provided at one end of the flow channel member (154) away from the filter body (163), and the switching control member (168) is provided with a driving portion (1681) corresponding to the driving surface (16514), and the flow channel member (154) is driven to move by rotating the switching control member (168).

6. The filtering device according to claim 2, characterized in that: A first downward pressure spring (1655) is also provided between the skeleton (164) and the flow channel component (165).

7. The filtering device according to claim 2, characterized in that: The switching control component (168) is provided with a filter material cavity (1680), a detachable medicine charging assembly (167) is provided in the filter material cavity (1680), and the filter material cavity (1680) is connected to the second water filtering channel (16513).

8. The filtering device according to claim 7, characterized in that: A water-stop assembly (166) is provided between the second water filtering channel (16513) and the filter material cavity (1680).

9. The filtering device according to claim 8, characterized in that: The water stop assembly (166) includes: a water stop plate (1662) movably arranged in the second water filter channel (16513), a water stop sealing ring (1661) arranged on the outer periphery of the water stop plate (1662), and a second downward pressure spring (1663) arranged between the channel member (165) and the water stop plate (1662), and the water stop plate (1662) and the water stop sealing ring (1661) are arranged corresponding to the opening of the filter material cavity (1680).

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

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