Valve path structure of filter and pre-filter using same

Abstract

The utility model provides a valve path structure of filter, including filter upper cover, change over valve, filter drum and filter core. The valve path structure of filter set up change over valve, and set up the water inlet channel, water outlet channel and change over valve installation cavity of making a match in the filter upper cover, because the lateral wall of change over valve is equipped with first communicating port, second communicating port, third communicating port and fourth communicating port in proper order, and is equipped with the first channel, second channel and third channel of not intercommunication in change over valve, through rotating change over valve, can make first communicating port, second communicating port, third communicating port or fourth communicating port respectively with water inlet channel or water outlet channel realize intercommunication, to make filter can switch among four kinds of modes of making water, back flushing, bypass and water stop, when needing to replace filter core, filter rear section pipeline maintenance and maintenance and the quick cleaning of filter core etc. operation, do not need to carry out the water cut operation again, reduced the operation difficulty.

Description

Technical Field

[0001] This utility model relates to the field of filter elements, and more particularly to a valve circuit structure for a filter and a pre-filter using the same. Background Technology

[0002] Currently, with the development of society, people are paying more and more attention to health issues. Because tap water contains many substances that are not good for health, more and more people are installing water purification equipment in their homes to filter tap water.

[0003] However, current filters on the market do not have a multi-state switching linkage valve structure, so the function of pre-filters is relatively simple. When replacing the filter element, the water supply needs to be turned off, which causes inconvenience to other household water appliances. Utility Model Content

[0004] The purpose of this invention is to propose a valve circuit structure for a filter and a pre-filter using it, so as to solve the problem that the above-mentioned filters have relatively simple functions and that the water source needs to be shut off when replacing the filter element.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model provides a valve circuit structure for a filter, including a filter cover, a switching valve, a filter cartridge, and a filter element;

[0007] The outer wall of the filter element, the inner wall of the filter cartridge, and the filter cover cooperate to form a raw water chamber; the filter cover is provided with an inlet channel and an outlet channel, and the filter cover is provided with a switching valve mounting cavity, in which the switching valve is rotatably assembled; the filter element is disposed in the filter cartridge, and the filter cartridge is detachably connected to the filter cover;

[0008] The switching valve has a first connecting port, a second connecting port, a third connecting port, and a fourth connecting port sequentially arranged on its side wall; the switching valve has a first channel, a second channel, and a third channel that are not interconnected; the second channel is sleeved around the outer periphery of the first channel, and a connecting channel is provided between the first channel and the second channel, the connecting channel connecting the first connecting port to the first channel and the second connecting port to the second channel; the third channel runs horizontally through the first channel and the second channel, one end of the third channel connecting to the third connecting port and the other end of the third channel connecting to the fourth connecting port; the first channel is connected to the water outlet of the filter element, and the second channel is connected to the raw water chamber; the fourth connecting port is equipped with a first check valve;

[0009] The valve circuit structure includes four modes: water production, backflushing, bypass, and water shut-off. In water production mode, the second connection port is connected to the inlet channel, and the first connection port is connected to the outlet channel. In backflushing mode, the first connection port is connected to the inlet channel, and the second connection port is connected to the outlet channel. In bypass mode, the third connection port is connected to the inlet channel, and the fourth connection port is connected to the outlet channel. In water shut-off mode, the fourth connection port is connected to the inlet channel, and the third connection port is connected to the outlet channel.

[0010] In the valve circuit structure of the filter, the switching valve includes a switching valve body and a handle. The first channel, the second channel, and the third channel are disposed in the switching valve body. The first connecting port, the second connecting port, the third connecting port, and the fourth connecting port are respectively disposed on the side wall of the switching valve body. The openings of the first channel and the second channel are located at the bottom of the switching valve body.

[0011] The switching valve body is rotatably assembled in the switching valve mounting cavity. A connecting shaft is provided on the top of the switching valve body. The connecting shaft passes through the filter cover and is connected to the handle.

[0012] In the valve circuit structure of the filter, the inlet channel and the outlet channel are coaxially arranged along the X-axis direction. The first connecting port, the second connecting port, the third connecting port and the fourth connecting port are arranged on the same horizontal plane, and the first connecting port and the second connecting port are arranged opposite each other, and the third connecting port and the fourth connecting port are arranged opposite each other.

[0013] In the valve circuit structure of the filter, the filter element includes a filter element upper cover, a filter body, and a filter element lower cover. The filter element upper cover is provided with a water outlet, which is connected to the first channel. The filter element upper cover is located at the top of the filter body, and the filter element lower cover is located at the bottom of the filter body.

[0014] In the valve circuit structure of the filter, the water inlet channel is equipped with a second one-way valve.

[0015] The valve circuit structure of the filter also includes a pressure relief valve, and the filter cover is provided with a pressure relief hole; the pressure relief valve includes a pressure relief button, a pressure relief rod, a pressure relief spring, and a top block; the upper end of the pressure relief rod is connected to the pressure relief button, and the lower end of the pressure relief rod passes through the pressure relief hole into the raw water chamber and is connected to the top block; the bottom area of ​​the top block is larger than the top block; one end of the pressure relief spring is pressed against the bottom of the pressure relief button, and the other end of the pressure relief spring is pressed against the top of the filter cover, so that the top block is pressed against the inner wall of the filter cover.

[0016] The valve circuit structure of the filter also includes a hanging plate. The bottom of the hanging plate is detachably connected to the filter cover, and one side of the hanging plate is bent upward to form a hanging surface. A hanging hole is provided on the hanging surface.

[0017] This utility model also provides a pre-filter, which uses the valve circuit structure of the filter described above.

[0018] One of the technical solutions of this utility model can have the following beneficial effects:

[0019] The filter's valve structure includes a switching valve, and the filter cover features a matching inlet channel, outlet channel, and switching valve mounting cavity. The switching valve has a first, second, third, and fourth connecting port sequentially on its side wall, and internally, it has separate first, second, and third channels. By rotating the switching valve, the first, second, third, or fourth connecting port can be connected to either the inlet or outlet channel. This allows the filter to switch between four modes: water production, backwashing, bypass, and shut-off. When replacing the filter element, performing maintenance on the downstream pipeline, or quickly cleaning the filter element, there is no need to shut off the water supply, reducing operational difficulty and saving time. The filter is simple in structure and easy to use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of one embodiment of the present invention in water production mode;

[0022] Figure 3 This is a cross-sectional schematic diagram of one embodiment of the present invention in recoil mode;

[0023] Figure 4 This is a cross-sectional schematic diagram of one embodiment of the present invention in bypass mode;

[0024] Figure 5 This is a cross-sectional schematic diagram of one embodiment of the present invention in the water-stopping mode;

[0025] Figure 6 This is a schematic diagram of the switching valve in one embodiment of the present invention;

[0026] Figure 7 yes Figure 6 A schematic diagram of the structure on the other side of the embodiment;

[0027] Figure 8 This is a schematic diagram of the pressure relief valve in one embodiment of the present invention;

[0028] In the attached diagram: 1. Filter cover; 2. Switching valve; 3. Filter cartridge; 4. Filter element; 5. Hanging plate;

[0029] Water inlet channel 11, water outlet channel 12; pressure relief valve 13; switching valve body 21, handle 22, connecting shaft 23; filter element upper cover 41, filter body 42, filter element lower cover 43; hanging surface 51;

[0030] Raw water chamber 101; second one-way valve 111; pressure relief button 131, pressure relief rod 132, pressure relief spring 133, top block 134; first connecting port 201, second connecting port 202, third connecting port 203, fourth connecting port 204; first one-way valve 205; first channel 211, second channel 212, third channel 213; connecting channel 214; suspension hole 511. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis.

[0033] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Please refer to Figures 1-8 This utility model provides a valve circuit structure for a filter, including a filter cover 1, a switching valve 2, a filter cartridge 3, and a filter element 4;

[0036] The outer wall of the filter element 4, the inner wall of the filter cartridge 3, and the filter cover 1 cooperate to form the raw water chamber 101; the filter cover 1 is provided with an inlet channel 11 and an outlet channel 12, and the filter cover 1 is provided with a switching valve mounting cavity, and the switching valve 2 is rotatably assembled in the switching valve mounting cavity; the filter element 4 is disposed in the filter cartridge 3, and the filter cartridge 3 is detachably connected to the filter cover 1.

[0037] The sidewall of the switching valve 2 is sequentially provided with a first connecting port 201, a second connecting port 202, a third connecting port 203, and a fourth connecting port 204; the switching valve 2 is provided with a first channel 211, a second channel 212, and a third channel 213 that are not interconnected; the second channel 212 is sleeved on the outer periphery of the first channel 211, and a connecting channel 214 is provided between the first channel 211 and the second channel 212, the connecting channel 214 connecting the first connecting port 201 with the first channel 211, and the second connecting port 202 with the second channel 212; the third channel 213 passes through the first channel 211 and the second channel 212 in a horizontal direction, one end of the third channel 213 is connected to the third connecting port 203, and the other end of the third channel 213 is connected to the fourth connecting port 204; the first channel 211 is connected to the water outlet of the filter element 4, and the second channel 212 is connected to the raw water chamber 101; the fourth connecting port 204 is provided with a first one-way valve 205;

[0038] The valve circuit structure includes four modes: water production, backflushing, bypass, and water shut-off. When in water production mode, the second connection port 202 is connected to the water inlet channel 11, and the first connection port 201 is connected to the water outlet channel 12. When in backflushing mode, the first connection port 201 is connected to the water inlet channel 11, and the second connection port 202 is connected to the water outlet channel 12. When in bypass mode, the third connection port 203 is connected to the water inlet channel 11, and the fourth connection port 204 is connected to the water outlet channel 12. When in water shut-off mode, the fourth connection port 204 is connected to the water inlet channel 11, and the third connection port 203 is connected to the water outlet channel 12.

[0039] The filter's valve structure includes a switching valve 2, and the filter cover 1 has a matching inlet channel 11, an outlet channel 12, and a switching valve mounting cavity. The switching valve 2 has a first connecting port 201, a second connecting port 202, a third connecting port 203, and a fourth connecting port 204 sequentially on its side wall. The switching valve 2 also has a first channel 211, a second channel 212, and a third channel 213 that are not interconnected. By rotating the switching valve 2, the first connecting port 201, the second connecting port 202, the third connecting port 203, or the fourth connecting port 204 can be connected to the inlet channel 11 or the outlet channel 12, respectively. This allows the filter to switch between four modes: water production, backwashing, bypass, and water shut-off. When replacing the filter element 4, performing maintenance on the downstream pipeline, or quickly cleaning the filter element, there is no need to shut off the water supply, reducing operational difficulty and saving time. The filter is simple in structure and easy to use.

[0040] In practical applications, the side wall of filter element 4 is the water inlet end, and the inside of filter element 4 is provided with a filter chamber. The top of the filter chamber is connected to the first channel 211. Unfiltered water enters the filter chamber from the side wall of filter element 4 to achieve the purpose of filtration. The water in the filter chamber is the filtered water. The filtered water enters the first channel 211 through the filter chamber.

[0041] When in water production mode, the second connecting port 202 is connected to the inlet channel 11, and the first connecting port 201 is connected to the outlet channel 12. Unfiltered water enters from the inlet channel 11 and flows through the second channel 212 into the raw water chamber 101. After being filtered by the filter element 4, filtered water is formed and flows into the filter chamber. Subsequently, the filtered water first enters the connecting channel 214 through the first channel 211, and then enters the outlet channel 12 through the connecting channel 214, thus achieving the purpose of discharging the filtered water from the filter. At this time, the third connecting port 203 and the fourth connecting port 204 are close to the side wall of the switching valve mounting cavity and do not affect the flow of filtered water.

[0042] In backwash mode, the first connection port 201 is connected to the inlet channel 11, and the second connection port 202 is connected to the outlet channel 12. Unfiltered water enters through the inlet channel 11, passes through the first channel 211 into the filter chamber, and flows from the filter chamber to the raw water chamber 101. After the filter element 4 is rinsed, wastewater is formed, which enters the second channel 212 through the raw water chamber 101. Subsequently, the wastewater enters the outlet channel 12 through the second connection port 202, thus achieving the purpose of rinsing the filter element 4. At this time, the third connection port 203 and the fourth connection port 204 are also close to the side wall of the switching valve mounting cavity and do not affect the flow of wastewater.

[0043] In bypass mode, the third connection port 203 is connected to the inlet channel 11, and the fourth connection port 204 is connected to the outlet channel 12. At this time, the third channel 213 directly connects the inlet channel 11 and the outlet channel 12, allowing water to flow along the inlet channel 11-third channel 213-outlet channel 12, enabling direct discharge. When the filter element becomes clogged, the bypass mode can be used temporarily to allow water to drain directly without passing through the filter element 4, avoiding the problem of water leakage or even breakage of the filter cartridge 3 due to excessive pressure in the original water chamber 101. In this mode, the first channel 211 and the second channel 212 are not connected to the inlet channel 11 or the outlet channel 12, and the water flow is not affected.

[0044] When in the water-stopping mode, the fourth connection port 204 is connected to the water inlet channel 11, and the third connection port 203 is connected to the water outlet channel 12. At this time, the third channel 213 directly connects the water inlet channel 11 and the water outlet channel 12, but the first one-way valve 205 restricts water flow, preventing water from entering the water outlet channel 12 through the third channel 213, thus achieving the purpose of water stoppage. At this time, the filter cartridge 3 can be separated from the filter cover, and the filter element 4 can be replaced.

[0045] Specifically, the switching valve 2 includes a switching valve body 21 and a handle 22. The first channel 211, the second channel 212 and the third channel 213 are disposed in the switching valve body 21. The first connecting port 201, the second connecting port 202, the third connecting port 203 and the fourth connecting port 204 are respectively disposed on the side wall of the switching valve body 21. The openings of the first channel 211 and the second channel 212 are located at the bottom of the switching valve body 21.

[0046] The switching valve body 21 is rotatably assembled in the switching valve mounting cavity. The top of the switching valve body 21 is provided with a connecting shaft 23, which passes through the filter cover 1 and is connected to the handle 22.

[0047] The above structure allows operators to easily rotate the switching valve body 21 with one hand, reducing the difficulty of switching modes of the switching valve 2.

[0048] Specifically, the water inlet channel 11 and the water outlet channel 12 are coaxially arranged along the X-axis direction. The first connecting port 201, the second connecting port 202, the third connecting port 203 and the fourth connecting port 204 are arranged on the same horizontal plane, and the first connecting port 201 and the second connecting port 202 are arranged opposite to each other, and the third connecting port 203 and the fourth connecting port 204 are arranged opposite to each other.

[0049] In one specific embodiment of this utility model, the first connecting port 201 and the second connecting port 202 are arranged opposite to each other, the third connecting port 203 and the fourth connecting port 204 are arranged opposite to each other, and the water inlet channel 11 and the water outlet channel 12 are coaxially arranged. The switching valve 2 only needs to rotate 90° to switch modes, ensuring that each switch is accurately aligned with the target mode and avoiding internal leakage between the two modes. Moreover, the above structure is compact, requiring no space to be reserved for misaligned interfaces, minimizing the valve body diameter, making it suitable for embedded installation, and optimizing pipeline design, allowing direct connection of external pipelines.

[0050] Specifically, the filter element 4 includes an upper cover 41, a filter body 42, and a lower cover 43. The upper cover 41 is provided with a water outlet, which is connected to the first channel 211. The upper cover 41 is located at the top of the filter body, and the lower cover 43 is located at the bottom of the filter body.

[0051] Filter element 4 can be referenced from existing water purifier filter elements. The upper cover 41 and lower cover 43 of the filter element isolate the upper and lower ends of the filter body 42 from the raw water chamber 101, so that unfiltered water can only enter the filtration chamber from the side wall of the filter body 42 in water production mode, and can only enter the raw water chamber 101 from the filtration chamber in backwash mode, avoiding the problem of cross-contamination. The water outlet on the upper cover 41 of the filter element is the water outlet end of the filter element 4.

[0052] Optionally, the water inlet channel 11 is provided with a second one-way valve 111.

[0053] With the above structure, unfiltered water can only enter the water inlet channel 11 in one direction, and the water in the original water chamber 101 cannot be discharged in reverse through the water inlet channel 11, thus preventing backflow and preventing wastewater from flowing back to the water supply network during backwashing mode.

[0054] Preferably, the filter also includes a pressure relief valve 13, and the filter cover 1 is provided with a pressure relief hole; the pressure relief valve 13 includes a pressure relief button 131, a pressure relief rod 132, a pressure relief spring 133, and a top block 134; the upper end of the pressure relief rod 132 is connected to the pressure relief button 131, and the lower end of the pressure relief rod 132 passes through the pressure relief hole into the raw water chamber 101 and is connected to the top block 134; the bottom area of ​​the top block 134 is larger than the bottom area of ​​the filter cover 134; one end of the pressure relief spring 133 is pressed against the bottom of the pressure relief button 131, and the other end of the pressure relief spring 133 is pressed against the top of the filter cover 1, so that the top block 134 is pressed against the inner wall of the filter cover 1.

[0055] The pressure relief valve 13 can be referenced from existing filter pressure relief valves. Utilizing the design where the bottom area of ​​the top block 134 is much larger than the cross-sectional area of ​​the pressure relief orifice, it leverages the water pressure itself to generate a strong upward sealing force. With the assistance of the pressure relief spring 133, the pressure relief orifice is tightly closed under normal conditions. When the user presses the pressure relief button 131 forcefully, it overcomes the pressure relief spring 133 and the enormous water pressure sealing force, forcing the top block 134 to move downwards and open the pressure relief orifice, allowing high-pressure water to be discharged, thus achieving manual pressure relief. When the button is released, the pressure relief spring 133 pushes the top block 134 back to its original position, resealing the valve.

[0056] With the above structure, the pressure relief valve 13 can be used to ensure the pressure balance inside the raw water chamber 101 and avoid the problem of excessive pressure in the raw water chamber 101 causing the filter cartridge 3 to break.

[0057] Preferably, the system also includes a hanging plate 5, the bottom of which is detachably connected to the filter cover 1, and one side of the hanging plate 5 is bent upward to form a hanging surface 51, on which a hanging hole 511 is provided.

[0058] The mounting plate 5 includes a horizontal plate and a hanging surface 51. The horizontal plate is detachably connected to the filter cover 1, and the hanging surface 51 is formed by bending one side of the mounting plate 5 upward, so that the cross-section of the mounting plate 5 is L-shaped. The above structure can facilitate the installation of the filter.

[0059] This utility model also provides a pre-filter, which uses the valve circuit structure of the filter described above.

[0060] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A valve passage structure of a filter, characterized by, Includes filter cover, switching valve, filter cartridge and filter element; The outer wall of the filter element, the inner wall of the filter cartridge, and the filter cover cooperate to form a raw water chamber; the filter cover is provided with an inlet channel and an outlet channel, and the filter cover is provided with a switching valve mounting cavity, in which the switching valve is rotatably assembled; the filter element is disposed in the filter cartridge, and the filter cartridge is detachably connected to the filter cover; The sidewall of the switching valve is provided with a first connecting port, a second connecting port, a third connecting port and a fourth connecting port in sequence; the switching valve is provided with a first channel, a second channel and a third channel that are not interconnected; the second channel is sleeved on the outer periphery of the first channel, and a connecting channel is provided between the first channel and the second channel, the connecting channel connecting the first connecting port to the first channel and the second connecting port to the second channel; The third channel extends horizontally through the first and second channels. One end of the third channel is connected to the third connecting port, and the other end of the third channel is connected to the fourth connecting port. The first channel is connected to the water outlet of the filter element, and the second channel is connected to the raw water chamber. The fourth connecting port is equipped with a first one-way valve. The valve circuit structure includes four modes: water production, backflushing, bypass, and water shut-off. In water production mode, the second connection port is connected to the inlet channel, and the first connection port is connected to the outlet channel. In backflushing mode, the first connection port is connected to the inlet channel, and the second connection port is connected to the outlet channel. In bypass mode, the third connection port is connected to the inlet channel, and the fourth connection port is connected to the outlet channel. In water shut-off mode, the fourth connection port is connected to the inlet channel, and the third connection port is connected to the outlet channel.

2. The valve circuit structure of a filter according to claim 1, characterized in that, The switching valve includes a switching valve body and a handle. The first channel, the second channel, and the third channel are disposed in the switching valve body. The first connecting port, the second connecting port, the third connecting port, and the fourth connecting port are respectively disposed on the side wall of the switching valve body. The openings of the first channel and the second channel are located at the bottom of the switching valve body. The switching valve body is rotatably assembled in the switching valve mounting cavity. A connecting shaft is provided on the top of the switching valve body. The connecting shaft passes through the filter cover and is connected to the handle.

3. The valve circuit structure of a filter according to claim 1, characterized in that, The water inlet channel and the water outlet channel are coaxially arranged along the X-axis direction. The first connecting port, the second connecting port, the third connecting port and the fourth connecting port are arranged on the same horizontal plane, and the first connecting port and the second connecting port are arranged opposite each other, and the third connecting port and the fourth connecting port are arranged opposite each other.

4. The valve circuit structure of a filter according to claim 1, characterized in that, The filter element includes a filter element top cover, a filter body, and a filter element bottom cover. The filter element top cover is provided with a water outlet, which is connected to the first channel. The filter element top cover is located on the top of the filter body, and the filter element bottom cover is located at the bottom of the filter body.

5. The valve circuit structure of a filter according to claim 1, characterized in that, The water inlet channel is equipped with a second one-way valve.

6. The valve circuit structure of a filter according to claim 1, characterized in that, It also includes a pressure relief valve, and the filter cover is provided with a pressure relief hole; the pressure relief valve includes a pressure relief button, a pressure relief rod, a pressure relief spring and a top block; the upper end of the pressure relief rod is connected to the pressure relief button, and the lower end of the pressure relief rod passes through the pressure relief hole into the raw water chamber and is connected to the top block; the bottom area of ​​the top block is larger than the top block; one end of the pressure relief spring is pressed against the bottom of the pressure relief button, and the other end of the pressure relief spring is pressed against the top of the filter cover, so that the top block is pressed against the inner wall of the filter cover.

7. The valve circuit structure of a filter according to claim 1, characterized in that, It also includes a hanging plate, the bottom of which is detachably connected to the filter cover, and one side of the hanging plate is bent upward to form a hanging surface, with hanging holes provided on the hanging surface.

8. A pre-filter, characterized in that, The pre-filter uses the valve circuit structure of the filter according to any one of claims 1 to 7.

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