Control valve and water treatment equipment

Abstract

The invention discloses a control valve and water treatment equipment, and belongs to the technical field of water treatment.The first valve body of the control valve is provided with a first port, a second port, a third port and a fourth port and can be used for being connected with a first treatment tank and a second treatment tank, and liquid flowing through the first treatment tank and the second treatment tank is controlled; therefore, valves do not need to be arranged for the two treatment tanks respectively, the size of the valves can be reduced, and occupied space is reduced. Moreover, the first piston can move to a first main valve position in the first inner cavity, so that a passage between the liquid inlet and the first port, a passage between the second port and the third port and a passage between the fourth port and the liquid outlet are all opened, and therefore, the first treatment tank and the second treatment tank can be connected in series for water supply, and two times of water treatment are realized; the water treatment effect is improved, and the water quality can meet the user requirements.

Description

Technical Field

[0001] This application belongs to the field of water treatment technology, specifically relating to a control valve and water treatment equipment. Background Technology

[0002] Currently, some users have higher requirements for water hardness, especially in areas with high water hardness or for medical applications. To ensure that the water hardness meets standards, water treatment equipment must be able to continuously provide low-hardness water, or even ultra-soft water. However, for most users, the space available for installing water treatment equipment is limited. Current equipment struggles to simultaneously meet the demands for both low-hardness water and a small footprint. Summary of the Invention

[0003] Purpose of the invention: This application provides a control valve designed to overcome the technical problem that current water treatment equipment is difficult to simultaneously meet the requirements of low hardness water and small footprint; another purpose of this application is to provide a water treatment device.

[0004] Technical solution: A control valve according to an embodiment of this application includes:

[0005] The first valve body has a first inner cavity, an inlet, an outlet, a first port, a second port, a third port, and a fourth port. The first port is used to connect to the first processing cavity of the first processing tank, the second port is used to connect to the first central tube of the first processing tank, the third port is used to connect to the second processing cavity of the second processing tank, and the fourth port is used to connect to the second central tube of the second processing tank.

[0006] A first piston is disposed in the first inner cavity and is configured to move to the first main valve position within the first inner cavity. When the first piston is in the first main valve position, the passage between the inlet and the first port, the passage between the second port and the third port, and the passage between the fourth port and the outlet are all opened within the first inner cavity.

[0007] In some embodiments, the first valve body further includes one or more of a first main valve port, a second main valve port, a third main valve port, a fourth main valve port, and a fifth main valve port; and the control valve further satisfies at least one of the following conditions:

[0008] The third main valve port is connected to the third port.

[0009] The fourth main valve port is connected to the second port;

[0010] When the first piston is in the first main valve position, the passage between the first main valve port, the liquid outlet and the fourth port is opened in the first inner cavity, while the passages of the second main valve port, the third main valve port, the fourth main valve port and the fifth main valve port are all closed.

[0011] In some embodiments, the first piston is further configured to move to a second main valve position within the first cavity. When the first piston is in the second main valve position, the passage between the second port, the outlet, and the first main valve port is opened within the first cavity, and the passage between the inlet and the first port, the passage between the fourth port and the second main valve port, and the passage between the third main valve port and the fourth main valve port are all opened, while the passage of the third port and the passage of the fifth main valve port are closed.

[0012] In some embodiments, the first piston is further configured to move to a third main valve position within the first inner cavity. When the first piston is in the third main valve position, the passage between the fourth port, the outlet, and the first main valve port is opened within the first inner cavity, and the passage between the inlet and the third port, the passage between the second main valve port and the fifth main valve port, and the passage between the first port and the fourth main valve port are all opened, while the passage between the second port and the passage between the third main valve port are closed.

[0013] In some embodiments, the first piston is further configured to move to a fourth main valve position within the first cavity. When the first piston is in the fourth main valve position, the passage between the first port, the third main valve port, and the fourth main valve port is opened within the first cavity; the passage between the fourth port, the second main valve port, and the fifth main valve port is opened; and the passage between the inlet and the third port, and the passage between the first main valve port and the outlet are both opened, while the passage at the second port is closed.

[0014] In some embodiments, the first piston is further configured to move to a fifth main valve position within the first cavity, wherein when the first piston is in the fifth main valve position, the passage of the inlet is closed within the first cavity.

[0015] In some embodiments, the control valve further includes:

[0016] Multiple main valve sealing grilles are arranged at intervals along the axial direction of the first piston in the first inner cavity to divide the first inner cavity into multiple main chambers. The inlet, the outlet, the first port, the second port, the third port, the fourth port, the first main valve port, the second main valve port, the third main valve port, the fourth main valve port, and the fifth main valve port are respectively connected to the corresponding main chambers.

[0017] The main valve sealing grille is configured to be able to seal with the first piston to isolate the main chambers located on both sides of the main valve sealing grille;

[0018] The main valve sealing grille is also configured to be spaced apart from the first piston so that the main chambers located on both sides of the main valve sealing grille are in communication with each other.

[0019] In some embodiments, the first piston includes:

[0020] Multiple main valve sealing steps are arranged at intervals along the axial direction of the first piston, and a main valve water passage groove is formed between two adjacent main valve sealing steps;

[0021] The main valve sealing grille is sealed to the main valve sealing step to isolate the main chambers located on both sides of the main valve sealing grille;

[0022] The main valve sealing grille is located at the main valve water passage groove, so as to connect the main chambers located on both sides of the main valve sealing grille through the main valve water passage groove.

[0023] In some embodiments, a plurality of the main valve water passages are arranged at axial intervals along the first piston, with the two outermost main valve water passages having the same width.

[0024] In some embodiments, among the plurality of main valve sealing grilles, the minimum spacing between two adjacent main valve sealing grilles is L. min The maximum spacing is L max ,satisfy:

[0025] L min / L max ≤1 / 2.

[0026] In some embodiments, the control valve further includes:

[0027] The second valve body has a second inner cavity, a first auxiliary valve port, a second auxiliary valve port, a third auxiliary valve port, and a salt port. The first auxiliary valve port is connected to the first main valve port, and the salt port is used to connect to the salt tank.

[0028] The second piston is disposed in the second inner cavity and is configured to move to the first auxiliary valve position in the second inner cavity. When the second piston is in the first auxiliary valve position, the passage between the first auxiliary valve port and the second auxiliary valve port, the passage between the first auxiliary valve port and the salt port, and the passage between the third auxiliary valve port and the salt port are all opened in the second inner cavity.

[0029] The jetting device has a jetting inlet and a nozzle orifice connected in communication. The jetting inlet is configured to communicate with a second auxiliary valve orifice, and the nozzle orifice is configured to communicate with a third auxiliary valve orifice.

[0030] In some embodiments, the second valve body further includes one or more of a fourth auxiliary valve port, a fifth auxiliary valve port, a sixth auxiliary valve port, and a drain port; and the control valve further satisfies at least one of the following conditions:

[0031] The fourth auxiliary valve port is connected to the second main valve port;

[0032] The fifth auxiliary valve port is connected to the fourth main valve port;

[0033] The sixth auxiliary valve port is connected to the siphon port of the jet device, and the siphon port is connected to the jet inlet and the nozzle port;

[0034] When the second piston is in the first auxiliary valve position, the passage between the first auxiliary valve port, the second auxiliary valve port, the third auxiliary valve port, the fourth auxiliary valve port, and the salt port is opened in the second inner cavity, while the passage between the fifth auxiliary valve port, the sixth auxiliary valve port, and the drain port is closed.

[0035] In some embodiments, the second piston is further configured to move to a second auxiliary valve position within the second inner cavity. When the second piston is in the second auxiliary valve position, the passage between the first auxiliary valve port and the second auxiliary valve port, and the passage between the third auxiliary valve port and the fourth auxiliary valve port are all opened within the second inner cavity, while the passages of the salt port, the fifth auxiliary valve port, the sixth auxiliary valve port, and the drain port are all closed.

[0036] In some embodiments, the second piston is further configured to move to a third auxiliary valve position within the second inner cavity. When the second piston is in the third auxiliary valve position, the passages between the first and second auxiliary valve ports, the passages between the third and fourth auxiliary valve ports, the passage between the salt port and the sixth auxiliary valve port, and the passage between the fifth auxiliary valve port and the drain port are all opened within the second inner cavity.

[0037] In some embodiments, the second piston is further configured to move to a fourth auxiliary valve position within the second inner cavity. When the second piston is in the fourth auxiliary valve position, the passage between the first auxiliary valve port, the second auxiliary valve port, the third auxiliary valve port, and the fourth auxiliary valve port is opened within the second inner cavity, the passage between the fifth auxiliary valve port and the drain port is opened, and the passages of the salt port and the sixth auxiliary valve port are closed.

[0038] In some embodiments, the second piston is further configured to move to the fifth auxiliary valve position in the second inner cavity. When the second piston is in the fifth auxiliary valve position, the passage between the first auxiliary valve port, the second auxiliary valve port and the fifth auxiliary valve port is opened in the second inner cavity, the passage between the third auxiliary valve port, the fourth auxiliary valve port and the drain port is opened, and the passage of the salt port and the passage of the sixth auxiliary valve port are both closed.

[0039] In some embodiments, the second piston is further configured to move to the sixth auxiliary valve position within the second inner cavity. When the second piston is in the sixth auxiliary valve position, the passage between the first auxiliary valve port, the second auxiliary valve port, and the fifth auxiliary valve port is opened within the second inner cavity, the passage between the third auxiliary valve port and the fourth auxiliary valve port is opened, and the passages of the salt port, the sixth auxiliary valve port, and the drain port are all closed.

[0040] In some embodiments, the control valve further includes:

[0041] Multiple auxiliary valve sealing grilles are arranged at intervals along the axial direction of the second piston in the second inner cavity to divide the second inner cavity into multiple auxiliary chambers. The first auxiliary valve port, the second auxiliary valve port, the third auxiliary valve port, the fourth auxiliary valve port, the fifth auxiliary valve port, the sixth auxiliary valve port, the salt port, and the drain port are respectively connected to the corresponding auxiliary chambers.

[0042] The secondary valve sealing grille is configured to be able to seal with the second piston to isolate the secondary chambers located on both sides of the secondary valve sealing grille;

[0043] The secondary valve sealing grille is also configured to be spaced apart from the second piston so that the secondary chambers located on both sides of the secondary valve sealing grille are in communication with each other.

[0044] In some embodiments, the second piston includes:

[0045] Multiple auxiliary valve sealing steps are arranged at intervals along the axial direction of the second piston, and a secondary valve water passage groove is formed between two adjacent auxiliary valve sealing steps;

[0046] The secondary valve sealing grille is sealed to the secondary valve sealing step to isolate the secondary chambers located on both sides of the secondary valve sealing grille;

[0047] The secondary valve sealing grille is located at the secondary valve water passage groove, so as to connect the secondary chambers located on both sides of the secondary valve sealing grille through the secondary valve water passage groove.

[0048] In some embodiments, the second piston has a flow passage for connecting at least two of the secondary chambers.

[0049] In some embodiments, the second inner cavity includes a secondary valve cavity and a salt valve cavity arranged axially along the second piston and communicating with each other, the second piston includes a secondary valve piston and a salt valve piston arranged axially and communicating with each other, the secondary valve piston is disposed in the secondary valve cavity, and at least a portion of the salt valve piston is disposed in the salt valve cavity;

[0050] The first auxiliary valve port, the second auxiliary valve port, the third auxiliary valve port, the fourth auxiliary valve port, the fifth auxiliary valve port, and the drain port are respectively disposed in the auxiliary valve chamber, and the salt port and the sixth auxiliary valve port are respectively disposed in the salt valve chamber.

[0051] In some embodiments, the jetting device includes a check valve disposed at the nozzle orifice to block liquid flowing from the third auxiliary valve orifice to the nozzle orifice.

[0052] Accordingly, the water treatment equipment described in this application embodiment includes:

[0053] The system comprises a first processing tank, a second processing tank, and a control valve as described above. The first port of the control valve is connected to the first processing chamber of the first processing tank, the second port of the control valve is connected to the first central tube of the first processing tank, the third port of the control valve is connected to the second processing chamber of the second processing tank, and the fourth port of the control valve is connected to the second central tube of the second processing tank.

[0054] Beneficial Effects: The control valve in this embodiment includes: a first valve body having a first inner cavity, an inlet, an outlet, a first port, a second port, a third port, and a fourth port. The first port is used to connect to the first processing chamber of the first processing tank, the second port is used to connect to the first central tube of the first processing tank, the third port is used to connect to the second processing chamber of the second processing tank, and the fourth port is used to connect to the second central tube of the second processing tank; a first piston is disposed in the first inner cavity and configured to move to a first main valve position within the first inner cavity. When the first piston is in the first main valve position, the passages between the inlet and the first port, the passages between the second and third ports, and the passages between the fourth port and the outlet are all opened within the first inner cavity. In this embodiment, the first valve body of the control valve has a first port, a second port, a third port, and a fourth port, which can be used to connect to the first and second processing tanks to control the liquids flowing through the first and second processing tanks respectively. This eliminates the need to install separate valves for the two processing tanks, reducing the valve size and space occupation. Furthermore, the first piston can move to the first main valve position within the first inner cavity, opening the passages between the inlet and the first port, the second and third ports, and the fourth port and the outlet. Thus, when this control valve is used in a water treatment device, it enables series water supply to the first and second treatment tanks. Water entering through the inlet can enter the first treatment tank for treatment via the first port. The treated water can then enter the second port, and via the third port, enter the second treatment tank for further treatment. Finally, it enters the fourth port and is supplied via the outlet, achieving two treatment processes, improving water treatment efficiency, and helping to ensure that water quality meets user needs.

[0055] The water treatment device according to this application embodiment includes: a first treatment tank, a second treatment tank, and the control valve as described above. The first port of the control valve is connected to the first treatment chamber of the first treatment tank, the second port of the control valve is connected to the first central pipe of the first treatment tank, the third port of the control valve is connected to the second treatment chamber of the second treatment tank, and the fourth port of the control valve is connected to the second central pipe of the second treatment tank. Therefore, this water treatment device can include all the technical features and beneficial effects of the above-described control valve, which will not be repeated here. Attached Figure Description

[0056] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0057] Figure 1 This is a schematic diagram of the structure of a control valve provided in some embodiments of this application;

[0058] Figure 2 This is a schematic diagram of the structure of the first valve body of the control valve provided in some embodiments of this application;

[0059] Figure 3 This is a schematic diagram of the structure of the first piston of the control valve provided in some embodiments of this application;

[0060] Figure 4 This is a schematic diagram of the structure of the second valve body of the control valve provided in some embodiments of this application;

[0061] Figure 5 This is a schematic diagram of the structure of the second piston of the control valve provided in some embodiments of this application;

[0062] Figure 6 A schematic diagram of the structure of the jetting device of the control valve provided in some embodiments of this application;

[0063] Figure 7 A schematic diagram of the flow path of a control valve provided in some embodiments of this application;

[0064] Figure 8 This is a schematic diagram illustrating the series water supply configuration of water treatment equipment provided in some embodiments of this application;

[0065] Figure 9 A schematic diagram illustrating the state of a water treatment device connected in series and filling a brine tank, provided in some embodiments of this application;

[0066] Figure 10 A schematic diagram of the structure of a water treatment device provided in some embodiments of this application, showing the first treatment tank supplying water and the second treatment tank in standby state;

[0067] Figure 11 A schematic diagram of the structure of a water treatment device provided in some embodiments of this application, showing the water supply state of the first treatment tank and the salt absorption state of the second treatment tank;

[0068] Figure 12 A schematic diagram of the structure of a water treatment device provided in some embodiments of this application, showing the water supply to the first treatment tank and the backwashing state of the second treatment tank;

[0069] Figure 13 A schematic diagram of the structure of a water treatment device provided in some embodiments of this application, showing the water supply to the first treatment tank and the forward washing state of the second treatment tank;

[0070] Figure 14 A schematic diagram of the structure of a water treatment device provided in some embodiments of this application, showing the second treatment tank supplying water and the first treatment tank in standby mode;

[0071] Figure 15 A schematic diagram of the structure of a water treatment device provided in some embodiments of this application, showing the second treatment tank supplying water and the first treatment tank absorbing salt.

[0072] Figure 16 A schematic diagram of the structure of a water treatment device provided in some embodiments of this application, showing the water supply to the second treatment tank and the backwashing state of the first treatment tank;

[0073] Figure 17 A schematic diagram of the structure of a water treatment device provided in some embodiments of this application, showing the water supply to the second treatment tank and the forward washing state of the first treatment tank;

[0074] Figure 18 This is a structural schematic diagram of the water treatment equipment in bypass state provided in some embodiments of this application;

[0075] Figure 19 A schematic diagram of a water treatment device in the off state provided in some embodiments of this application;

[0076] Figure 20 This is another structural schematic diagram of the water treatment equipment in the off state provided in some embodiments of this application;

[0077] Reference numerals: 100-First valve body; 110-First inner cavity; 111-Main chamber; 120-Inlet; 130-Outlet; 140-First port; 141-Second port; 142-Third port; 143-Fourth port; 150-First main valve port; 160-Second main valve port; 170-Third main valve port; 180-Fourth main valve port; 190-Fifth main valve port; 200-First piston; 210-Main valve sealing step; 220-Main valve water passage groove; 300-Second valve body; 310-Second inner cavity; 311-Secondary chamber; 312-Secondary valve chamber; 313-Salt valve chamber; 320-First secondary valve port; 330-Secondary valve port; 340-... 350 - Fourth auxiliary valve port; 360 - Fifth auxiliary valve port; 370 - Sixth auxiliary valve port; 380 - Salt port; 390 - Drain port; 400 - Second piston; 401 - Auxiliary valve piston; 402 - Salt valve piston; 410 - Auxiliary valve sealing step; 420 - Auxiliary valve water passage groove; 430 - Flow passage; 500 - Jet device; 510 - Jet inlet; 520 - Nozzle port; 530 - Siphon port; 540 - Check valve; 600 - Main valve sealing grille; 700 - Auxiliary valve sealing grille; 800 - First treatment tank; 810 - First treatment chamber; 820 - First central pipe; 900 - Second treatment tank; 910 - Second treatment chamber; 920 - Second central pipe. Detailed Implementation

[0078] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0079] In the description of this application, it should be understood that the terms "length," "width," "upper," "lower," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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 application. In the description of this application, "a plurality of" means two or more, and "at least one" can mean one, two, or more, unless otherwise expressly specified.

[0080] Some users have higher requirements for low-hardness water, especially in areas with high-hardness water or for medical applications. To ensure that the hardness of the water used by products or users meets standards, water treatment equipment must be able to continuously provide low-hardness water or even ultra-soft water. A single treatment tank cannot continuously supply low-hardness water, nor can it consistently maintain the desired water treatment effect. Therefore, multiple soft water control valves are usually used in conjunction with multiple treatment tanks to provide low-hardness water. However, for some users, such as typical households, under-sink space is limited, and due to installation space constraints, most can only use a single-tank water supply system, which cannot achieve a continuous supply of low-hardness water. In short, existing water treatment equipment control valves or the entire unit cannot effectively balance the needs for continuous water supply, low-hardness water, and a small footprint.

[0081] In view of this, embodiments of this application provide a control valve and a water treatment device including the control valve. Please refer to... Figure 1 In some embodiments of this application, the control valve includes a first valve body 100 and a first piston 200. By setting the first valve body 100 and the first piston 200, the control valve can realize dual-tank series water supply, improving the water treatment effect. In some embodiments of this application, the control valve may also include a second valve body 300, a second piston 400, and a jet device 500. By combining the first valve body 100, the first piston 200, the second valve body 300, the second piston 400, and the jet device 500, the control valve can also realize functions such as dual-tank alternating water supply, bypass, and water injection into the brine tank. The dual-tank alternating water supply can be one tank supplying water while the other tank is in one of the following states: standby, brine absorption, backwashing, or forward washing, thus achieving continuous water supply.

[0082] Specifically, please combine them together. Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the first inner cavity 110 of the first valve body 100 of the control valve is configured as a piston cavity to accommodate the first piston 200. The inlet 120 of the first valve body 100 is used to receive the liquid to be treated (such as tap water, sewage, or other types of aqueous solutions). For example, for a household user, the inlet 120 can be connected to the user's tap water pipe, allowing water from the tap water pipe to enter the first inner cavity 110 via the inlet 120. The outlet 130 of the first valve body 100 can be used to supply the treated liquid. For example, the outlet 130 can be connected to the user's tap water outlet to supply treated soft water to the user. The first port 140 of the first valve body 100 is used to connect to the first treatment chamber 810 of the first treatment tank 800, the second port 141 is used to connect to the first central pipe 820 of the first treatment tank 800, the third port 142 is used to connect to the second treatment chamber 910 of the second treatment tank 900, and the fourth port 143 is used to connect to the second central pipe 920 of the second treatment tank 900. Therefore, the control valve can be connected to the first treatment tank 800 and the second treatment tank 900, meaning that one control valve can connect to two treatment devices. The first treatment tank 800 and the second treatment tank 900 can be resin tanks for softening water. The first treatment chamber 810 and the second treatment chamber 910 can be filled with resin materials capable of softening water. When hard water passes through the first treatment chamber 810 or the second treatment chamber 910, the resin material softens the hard water, thereby reducing its hardness. Alternatively, the first treatment tank 800 and the second treatment tank 900 can be other types of treatment tanks, meaning that the first treatment chamber 810 and the second treatment chamber 910 can be filled with other types of water treatment materials, such as filter materials or adsorption materials. The water treatment materials in the first treatment tank 800 and the second treatment tank 900 can be the same type of material or different types of materials, depending on the actual treatment requirements.

[0083] A first piston 200 is movably disposed within a first inner cavity 110 and is configured to move within the first inner cavity 110 to switch valve positions. The first piston 200 can be connected to a drive device (e.g., a motor) to move within the first inner cavity 110 under the drive of the drive device, thereby switching valve positions. The outer peripheral surface of the first piston 200 is sealed to the inner wall of the first valve body 100 (which forms the first inner cavity 110). When in different valve positions, the first piston 200 can open and close different passages within the first inner cavity 110. In this embodiment, the first piston 200 can move within the first inner cavity 110 to the first main valve position. When the first piston 200 is in the first main valve position, the passages between the inlet 120 and the first port 140, the passage between the second port 141 and the third port 142, and the passage between the fourth port 143 and the outlet 130 are all opened within the first inner cavity 110.

[0084] Please refer to the following: Figure 8 and Figure 9 The diagram illustrates different operating states of the water treatment equipment provided in some embodiments of this application, wherein the first piston 200 of the control valve is always in the first main valve position. It can be seen that when the first piston 200 is in the first main valve position, water entering from the inlet 120 can flow through the first inner cavity 110 to the first port 140, and then enter the first treatment tank 800 from the first port 140. The water is then processed sequentially through the first treatment chamber 810 and the first central pipe 820. The processed water can return to the first inner cavity 110 through the second port 141, and enter the second treatment tank 900 through the third port 142. It is then processed again sequentially through the second treatment chamber 910 and the second central pipe 920, and then returns to the first inner cavity 110 through the fourth port 143, and is supplied via the outlet 130. In other words, when the first piston 200 is in the first main valve position, the first treatment tank 800 and the second treatment tank 900 can be connected in series. Water entering from the inlet 120 can flow through the first treatment tank 800 and the second treatment tank 900 in series to achieve two treatments, thereby improving the water treatment effect and helping to ensure that the water quality meets the user's needs.

[0085] It is understandable that, as described above, the control valve structure can achieve the series water supply of the first treatment tank 800 and the second treatment tank 900 through the first valve body 100 and the first piston 200 in its first inner cavity 110. When only the series water supply function is required and no other functions are needed, the control valve may not be equipped with structures such as the second valve body 300, the second piston 400 and the jet device 500.

[0086] Please refer to the following: Figures 7 to 20In the illustrated embodiment, the first valve body 100 of the control valve further includes a first main valve port 150, a second main valve port 160, a third main valve port 170, a fourth main valve port 180, and a fifth main valve port 190. Furthermore, the third main valve port 170 is interconnected with the third port 142, and the fourth main valve port 180 is interconnected with the second port 141. Moreover, when the first piston 200 is in the first main valve position, in the first inner cavity 110, the passage between the first main valve port 150, the liquid outlet 130, and the fourth port 143 is opened, while the passages of the second main valve port 160, the third main valve port 170, the fourth main valve port 180, and the fifth main valve port 190 are all closed. With this configuration, the first valve body 100 and the first piston 200 of the control valve can not only realize the series water supply function, but also cooperate with the second valve body 300, the second piston 400 and the jet device 500 to realize functions such as injecting water into the brine tank, supplying water to one of the first treatment tanks 800 and the second treatment tank 900 while the other is on standby, supplying water to one while the other draws salt from the brine tank, supplying water to one while the other is backwashing, supplying water to one while the other is forward washing, bypassing and shutting off.

[0087] In different embodiments of this application, depending on the different functional requirements to be achieved, the first valve body 100 of the control valve may also have one or more of the following: a first main valve port 150, a second main valve port 160, a third main valve port 170, a fourth main valve port 180, and a fifth main valve port 190. Furthermore, the control valve also satisfies at least one of the following conditions: a) the third main valve port 170 is interconnected with the third port 142; b) the fourth main valve port 180 is interconnected with the second port 141; c) when the first piston 200 is in the first main valve position, in the first inner cavity 110, the passage between the first main valve port 150, the outlet 130, and the fourth port 143 is opened, while the passages of the second main valve port 160, the third main valve port 170, the fourth main valve port 180, and the fifth main valve port 190 are all closed. The specific selection can be made according to the actual functional requirements of the control valve. For example, Figure 9 As shown, when water needs to be supplied to the brine tank in series with the first treatment tank 800 and the second treatment tank 900, the first valve body 100 also has a first main valve port 150, and when the first piston 200 is in the first main valve position, the passage between the first main valve port 150, the liquid outlet 130 and the fourth port 143 is opened in the first inner cavity 110. For example, Figure 11As shown, when water needs to be supplied to the first treatment tank 800 and salt needs to be absorbed by the second treatment tank 900, the first valve body 100 also has a first main valve port 150, a second main valve port 160, a third main valve port 170, a fourth main valve port 180, and a fifth main valve port 190, and conditions a, b, and c above are all satisfied. When only some of the above functions are needed, only the valve ports that achieve the required functions need to be set. The specific valve ports required for different functions can be understood by reading the full text of this application and the accompanying drawings.

[0088] Please refer to the following: Figure 10 , Figure 11 , Figure 12 and Figure 13 In some embodiments of this application, the first piston 200 is further configured to move to the second main valve position within the first inner cavity 110. When the first piston 200 is in the second main valve position, the passage between the second port 141, the outlet 130, and the first main valve port 150 is opened within the first inner cavity 110. Furthermore, the passages between the inlet 120 and the first port 140, the fourth port 143 and the second main valve port 160, and the third main valve port 170 and the fourth main valve port 180 are all opened, while the passages of the third port 142 and the fifth main valve port 190 are closed. By setting the second main valve position of the first piston 200 within the first inner cavity 110, the control valve can supply water to the first treatment tank 800 in the water treatment equipment. Specifically, water entering from the inlet 120 can flow through the first inner cavity 110 to the first port 140 and then enter the first treatment tank 800 from the first port 140. The water is then processed sequentially through the first treatment chamber 810 and the first central pipe 820. The treated water can return to the first inner cavity 110 through the second port 141 and be supplied through the outlet 130. The second treatment tank 900 can realize standby, salt absorption, backwashing, and forward washing functions according to the control of the second valve body 300, the second piston 400 and the jet device 500, which are described in detail below.

[0089] Please refer to the following: Figure 14 , Figure 15 , Figure 16 and Figure 17In some embodiments of this application, the first piston 200 is further configured to move to the third main valve position within the first inner cavity 110. When the first piston 200 is in the third main valve position, the passage between the fourth port 143, the outlet 130, and the first main valve port 150 is opened within the first inner cavity 110, and the passages between the inlet port 120 and the third port 142, the second main valve port 160 and the fifth main valve port 190, and the first port 140 and the fourth main valve port 180 are all opened, while the passages of the second port 141 and the third main valve port 170 are closed. By setting the third main valve position of the first piston 200 in the first inner cavity 110, the control valve in the water treatment equipment can supply water to the second treatment tank 900. That is, water entering from the inlet 120 can flow through the first inner cavity 110 to the third port 142, and then enter the second treatment tank 900 from the third port 142. The water is then processed sequentially through the second treatment chamber 910 and the second central pipe 920. The treated water can return to the first inner cavity 110 through the fourth port 143 and be supplied through the outlet 130. The first treatment tank 800 can realize standby, brine suction, backwashing, and forward washing functions according to the control of the second valve body 300, the second piston 400, and the jet device 500, which are described in detail below.

[0090] Please see Figure 18 and Figure 19 In some embodiments, the first piston 200 is also configured to move to the fourth main valve position within the first inner cavity 110. When the first piston 200 is in the fourth main valve position, the passages between the first port 140, the third main valve port 170, and the fourth main valve port 180 are opened within the first inner cavity 110; the passages between the fourth port 143, the second main valve port 160, and the fifth main valve port 190 are also opened; and the passages between the inlet port 120 and the third port 142, and between the first main valve port 150 and the outlet port 130 are also opened; the passage at the second port 141 is closed. When the first piston 200 is in the fourth main valve position, in conjunction with the control of the second valve body 300, the second piston 400, and the jetting device 500, the bypass and shut-off functions of the control valve can be realized. The bypass function means that water entering from the inlet 120 will not flow through the first treatment tank 800 and the second treatment tank 900, but will flow out from the outlet 130. The shut-off function means that the control valve is closed, and water cannot flow inside the control valve.

[0091] Please see Figure 20 The first piston 200 is also configured to move to the fifth main valve position within the first inner cavity 110. When the first piston 200 is in the fifth main valve position, the passage of the inlet 120 is closed within the first inner cavity 110, preventing water from entering the control valve, and thus the control valve is closed.

[0092] It should be noted that the first piston 200 can move along its axial direction in the first inner cavity 110 to switch between the first main valve position, the second main valve position, the third main valve position, the fourth main valve position, and the fifth main valve position. The first main valve position, the second main valve position, the third main valve position, the fourth main valve position, and the fifth main valve position correspond to different positions in the first inner cavity 110.

[0093] Please refer to them again. Figure 1 and Figure 2 In some embodiments of this application, the control valve further includes multiple main valve sealing grilles 600. These main valve sealing grilles 600 are arranged at intervals along the axial direction of the first piston 200 within the first inner cavity 110, dividing the first inner cavity 110 into multiple main chambers 111. An inlet 120, an outlet 130, a first port 140, a second port 141, a third port 142, a fourth port 143, a first main valve port 150, a second main valve port 160, a third main valve port 170, a fourth main valve port 180, and a fifth main valve port 190 are respectively connected to their corresponding main chambers 111. Connecting two main chambers 111 also allows the corresponding ports (i.e., the aforementioned ports and main valve ports) of the two main chambers 111 to be connected. The main valve sealing grilles 600 are configured to be able to seal against the first piston 200, thereby isolating the main chambers 111 located on both sides of the main valve sealing grilles 600. The main valve sealing grille 600 is also configured to be spaced apart from the first piston 200 so that the main chambers 111 located on both sides of the main valve sealing grille 600 are in communication with each other.

[0094] Please see Figure 3 In some embodiments of this application, the first piston 200 includes a plurality of main valve sealing steps 210, which are arranged at intervals along the axial direction of the first piston 200. A main valve water passage groove 220 is formed between two adjacent main valve sealing steps 210. The diameter of the first piston 200 at the main valve sealing step 210 is larger than the diameter at the main valve water passage groove 220. When the first piston 200 moves, the main valve sealing grille 600 is sealed to the main valve sealing steps 210, isolating the main chambers 111 located on both sides of the main valve sealing grille 600. When the first piston 200 moves, the main valve sealing grille 600 is located at the main valve water passage groove 220, meaning that the main valve sealing grille 600 is not sealed to any of the main valve sealing steps 210. In this case, the corresponding main valve water passage groove 220 connects to the main chambers 111 located on both sides of the main valve sealing grille 600.

[0095] In some embodiments, a plurality of main valve water passage grooves 220 are arranged at axial intervals along the first piston 200, with the two outermost main valve water passage grooves 220 having the same width. For example, Figure 3In the embodiment shown, four main valve sealing steps 210 are provided along the axial direction of the first piston 200, forming three main valve water passage grooves 220. The width of the main valve water passage grooves 220 on both sides is the same, and is greater than the width of the main valve water passage groove 220 in the middle. This is beneficial for setting and precisely adjusting the valve position, and allows the port in the middle part to be set more compactly and centrally, making the spatial layout more compact. This is beneficial for further reducing the space occupied by the water treatment equipment when connecting the first treatment tank 800 and the second treatment tank 900.

[0096] In some embodiments, among the plurality of main valve sealing grilles 600, the minimum spacing between two adjacent main valve sealing grilles 600 is L. min The maximum spacing is L max Satisfying: L min / L max ≤1 / 2. Optionally, L min / L max =1 / 2, which is beneficial for valve position setting and for miniaturization of equipment.

[0097] Optionally, the main valve sealing grille 600 includes a main valve grille body and a main valve sealing gasket. The main valve grille body is annular, and both its inner and outer circumferential surfaces are provided with sealing grooves, and each is fitted with a main valve sealing gasket. The main valve sealing gasket on the outer circumferential surface is sealed to the inner wall of the first valve body 100, and the main valve sealing gasket on the inner circumferential surface can be sealed to the first piston 200.

[0098] In some embodiments, the control valve may have all or at least some of the technical features described in the above embodiments. In addition, the control valve includes a second valve body 300, a second piston 400, and a jetting device 500. By providing the second valve body 300, the second piston 400, and the jetting device 500, the control valve can achieve more functions beyond the series water supply from the first treatment tank 800 and the second treatment tank 900 described above.

[0099] Please refer to the following for details. Figure 1 , Figures 4 to 7 , Figure 9 The second valve body 300 has a second inner cavity 310, a first auxiliary valve port 320, a second auxiliary valve port 330, a third auxiliary valve port 340, and a brine port 380. The first auxiliary valve port 320 is connected to the first main valve port 150, and the two can be connected through a channel provided between the first valve body 100 and the second valve body 300. The brine port 380 is used to communicate with a brine tank (not shown in the figure), which is used to provide granular salt required for water treatment.

[0100] The second piston 400 is movably disposed in the second inner cavity 310 and is configured to move within the second inner cavity 310 to switch valve positions. The second piston 400 can be connected to a drive device (e.g., a motor) to move within the second inner cavity 310 under the drive of the drive device, thereby switching valve positions. The outer peripheral surface of the second piston 400 is sealed to the inner wall of the second valve body 300 (which forms the second inner cavity 310). When in different valve positions, the second piston 400 can open and close different passages in the second inner cavity 310. In this embodiment, the second piston 400 can move within the second inner cavity 310 to the first secondary valve position. When the second piston 400 is in the first secondary valve position, the passages between the first secondary valve port 320 and the second secondary valve port 330, the passage between the first secondary valve port 320 and the salt port 380, and the passage between the third secondary valve port 340 and the salt port 380 are all opened within the second inner cavity 310.

[0101] The jet device 500 has a jet inlet 510 and a nozzle port 520 connected to each other. The jet inlet 510 is configured to communicate with a second auxiliary valve port 330, and the nozzle port 520 is configured to communicate with a third auxiliary valve port 340.

[0102] Please see Figure 9 , Figure 9 The diagram illustrates the state when the first piston 200 is in the first main valve position and the second piston 400 is in the first auxiliary valve position. In this state, the control valve can supply water in series to the first treatment tank 800 and the second treatment tank 900 in the water treatment equipment, and can also inject water into the brine tank. Specifically, hard water enters the first inner cavity 110 from the inlet 120 of the first valve body 100, and is first softened by the first treatment tank 800 through the first port 140 of the first valve body 100. The water softened for the first time enters the third port 142 from the second port 141 through the first inner cavity 110, and then undergoes a second softening process in the second treatment tank 900. The water softened for the second time enters the first inner cavity 110 from the fourth port 143, with part of it reaching the outlet 130 for water supply, and the other part entering the first auxiliary valve port 320 through the first main valve port 150. After being softened twice, one stream of water flows from the second inner cavity 310 to the brine outlet 380, while the other stream flows from the second auxiliary valve outlet 330 to the jet device, and then sequentially through the jet inlet 510 and the nozzle outlet 520 into the third auxiliary valve outlet 340. The two streams converge in the second inner cavity 310 and flow to the brine outlet 380, and then flow from the brine outlet 380 into the brine tank, thus realizing water injection.

[0103] Please refer to it again. Figures 7 to 20In the illustrated embodiment, the second valve body 300 of the control valve further includes a fourth auxiliary valve port 350, a fifth auxiliary valve port 360, a sixth auxiliary valve port 370, and a drain port 390. Furthermore, the control valve satisfies the following: d. The fourth auxiliary valve port 350 is connected to the second main valve port 160; e. The fifth auxiliary valve port 360 is connected to the fourth main valve port 180; f. The sixth auxiliary valve port 370 is connected to the siphon port 530 of the jet device 500, and the siphon port 530 is connected to the jet inlet 510 and the nozzle port 520; g. When the second piston 400 is in the first auxiliary valve position, in the second inner cavity 310, the passages between the first auxiliary valve port 320, the second auxiliary valve port 330, the third auxiliary valve port 340, the fourth auxiliary valve port 350, and the salt port 380 are opened, while the passages of the fifth auxiliary valve port 360, the sixth auxiliary valve port 370, and the drain port 390 are closed. With this configuration, the control valve can not only perform functions such as series water supply and water injection into the brine tank, but also enable functions such as water supply to one of the first treatment tank 800 and the second treatment tank 900 while the other is on standby, water supply to one of the two tanks while the other draws salt from the brine tank, water supply to one of the two tanks while the other backwashes, water supply to one of the two tanks while the other forwards, bypass, and shut-off.

[0104] In different embodiments of this application, depending on the different functional requirements to be achieved, the second valve body 300 of the control valve also has one or more of the following: a fourth auxiliary valve port 350, a fifth auxiliary valve port 360, a sixth auxiliary valve port 370, and a drain port 390. Furthermore, the control valve also satisfies at least one of the following conditions: d. The fourth auxiliary valve port 350 is connected to the second main valve port 160; e. The fifth auxiliary valve port 360 is connected to the fourth main valve port 180; f. The sixth auxiliary valve port 370 is connected to the siphon port 530 of the jet device 500, and the siphon port 530 is connected to the jet inlet 510 and the nozzle port 520; g. When the second piston 400 is in the first auxiliary valve position, in the second inner cavity 310, the passages between the first auxiliary valve port 320, the second auxiliary valve port 330, the third auxiliary valve port 340, the fourth auxiliary valve port 350, and the salt port 380 are opened, while the passages of the fifth auxiliary valve port 360, the sixth auxiliary valve port 370, and the drain port 390 are closed. The specific selection can be made according to the actual functional requirements of the control valve. For example, Figure 11 As shown, when water needs to be supplied to the first treatment tank 800 and salt needs to be absorbed by the second treatment tank 900, the second valve body 300 also has a fourth auxiliary valve port 350, a fifth auxiliary valve port 360, a sixth auxiliary valve port 370, and a drain port 390, and all four conditions d, e, f, and g above are satisfied. When only some of the above functions are needed, only the valve ports that achieve the required functions need to be set. The specific valve ports required for different functions can be understood by reading the full text of this application and the accompanying drawings.

[0105] Please refer to the following: Figure 8 , Figure 10 , Figure 14 , Figure 19 and Figure 20 In some embodiments of this application, the second piston 400 is further configured to move to the second auxiliary valve position within the second inner cavity 310. When the second piston 400 is in the second auxiliary valve position, the passages between the first auxiliary valve port 320 and the second auxiliary valve port 330, and between the third auxiliary valve port 340 and the fourth auxiliary valve port 350, are all opened within the second inner cavity 310. The passages of the salt port 380, the fifth auxiliary valve port 360, the sixth auxiliary valve port 370, and the drain port 390 are all closed. By setting the second auxiliary valve position of the second piston 400 within the second inner cavity 310, functions such as series water supply to the first treatment tank 800 and the second treatment tank 900, water supply from the first treatment tank 800 to the second treatment tank 900 while the second treatment tank 900 is on standby, water supply from the first treatment tank 800 to the second treatment tank 900 while the second treatment tank 900 is on standby, and control valve closure can be achieved.

[0106] Please see Figure 8 The first piston 200 is in the first main valve position, and the second piston 400 is in the second auxiliary valve position. The first treatment tank 800 and the second treatment tank 900 are connected in series for water supply. Since the flow path from the fourth auxiliary valve port 350 to the second main valve port 160 is blocked at the second main valve port 160, there is no flow between the first valve body 100 and the second valve body 300. Therefore, the control valve is set to the state of the first treatment tank 800 and the second treatment tank 900 being connected in series for water supply.

[0107] Please see Figure 10 The first piston 200 is in the second main valve position, and the second piston 400 is in the second auxiliary valve position. Hard water enters the first inner cavity 110 from the inlet 120 of the first valve body 100. It first undergoes softening treatment in the first treatment tank 800 through the first port 140 of the first valve body 100 (after the hard water enters the first treatment chamber 810, the calcium and magnesium ions in the hard water are adsorbed by resin, and then it exits through the first central pipe 820). Then, it flows through the first inner cavity 110 through the second port 141 and exits through the outlet 130. During this process, the first piston 200 closes the third port 142, and the second piston 400 closes the fifth auxiliary valve port 360, preventing water from entering the second treatment tank 900. Therefore, in this state, the control valve is set to supply water to the first treatment tank 800 while the second treatment tank 900 is on standby.

[0108] Please see Figure 14The first piston 200 is in the third main valve position, and the second piston 400 is in the second auxiliary valve position. Hard water enters the first inner cavity 110 from the inlet 120 of the first valve body 100. It first undergoes softening treatment in the second treatment tank 900 through the third port 142 of the first valve body 100 (after the hard water enters the second treatment chamber 910, the calcium and magnesium ions in the hard water are adsorbed by resin, and then it exits through the second central pipe 920). Then, it enters the first inner cavity 110 through the fourth port 143 and exits through the outlet 130. During this process, the first piston 200 closes the second port 141, and the second piston 400 closes the fifth auxiliary valve port 360, preventing water from entering the first treatment tank 800. Therefore, in this state, the control valve is set to supply water to the first treatment tank 800 while the second treatment tank 900 is on standby.

[0109] Please see Figure 19 The first piston 200 is located in the fourth main valve position, and the second piston 400 is located in the second auxiliary valve position. The second piston 400 closes the fifth auxiliary valve port 360. The flow path from the second main valve port 160 to the fourth auxiliary valve port 350 cannot flow due to the reverse blocking effect of the jet device 500, so that the entire flow path of the control valve is in a closed state, thereby realizing the control valve closing.

[0110] Optionally, in some embodiments, the jetting device 500 includes a check valve 540 disposed at the nozzle orifice 520 to block liquid flowing from the third auxiliary valve orifice 340 to the nozzle orifice 520. By providing the check valve 540, when water flows from the third auxiliary valve orifice 340 to the nozzle orifice 520, it is blocked by the check valve 540, further preventing backflow of water at the jetting device 500. Specifically, the check valve 540 can be a check ball, which can press the check ball against the nozzle orifice 520 when water flows from the third auxiliary valve orifice 340 to the nozzle orifice 520, blocking the nozzle orifice 520 and preventing backflow of water.

[0111] Please see Figure 20 The first piston 200 is in the fifth main valve position, and the second piston 400 is in the second main valve position. The first piston 200 blocks the liquid inlet 120, preventing water from flowing into the control valve and thus closing the control valve.

[0112] Please refer to the following: Figure 11 and Figure 15In some embodiments of this application, the second piston 400 is further configured to move to a third auxiliary valve position within the second inner cavity 310. When the second piston 400 is in the third auxiliary valve position, the passages between the first auxiliary valve port 320 and the second auxiliary valve port 330, between the third auxiliary valve port 340 and the fourth auxiliary valve port 350, between the brine port 380 and the sixth auxiliary valve port 370, and between the fifth auxiliary valve port 360 and the drain port 390 are all opened within the second inner cavity 310. By setting the third auxiliary valve position of the second piston 400 within the second inner cavity 310, functions such as the first treatment tank 800 supplying water and the second treatment tank 900 absorbing brine, or the first treatment tank 800 absorbing brine and the second treatment tank 900 supplying water, can be achieved.

[0113] Please see Figure 11 The first piston 200 is in the second main valve position, and the second piston 400 is in the third auxiliary valve position. Hard water enters the first inner cavity 110 from the inlet 120 of the first valve body 100, first passes through the first treatment tank 800 for softening treatment from the first port 140 of the first valve body 100, and then flows through the first inner cavity 110 through the second port 141 before exiting through the outlet 130. During this process, a portion of the soft water enters the first auxiliary valve port 320 through the first main valve port 150, and then enters the jet inlet 510 of the jet device 500 through the second auxiliary valve port 330. Water flows within the jetting device 500, creating a siphon effect that draws brine from the salt tank into the device through the salt inlet 380 and the sixth auxiliary valve port 370. After mixing with water, the brine is ejected through the nozzle port 520 into the third auxiliary valve port 340, and then flows from the fourth auxiliary valve port 350 into the second main valve port 160. Finally, it flows through the fourth port 143 into the second treatment tank 900. After calcium and magnesium ion exchange, the wastewater passes through the third main valve port 170, the fourth main valve port 180, and the fifth auxiliary valve port 360 before being discharged from the drain port 390. This achieves the function of supplying water to the first treatment tank 800 and absorbing brine from the second treatment tank 900.

[0114] Please see Figure 15The first piston 200 is in the third main valve position, and the second piston 400 is in the third auxiliary valve position. Hard water enters the first inner cavity 110 from the inlet 120 of the first valve body 100, first passes through the second treatment tank 900 for softening treatment via the third port 142 of the first valve body 100, and then flows through the first inner cavity 110 via the fourth port 143 before exiting through the outlet 130. During this process, a portion of the soft water enters the first auxiliary valve port 320 via the first main valve port 150, and then enters the jet inlet 510 of the jet device 500 via the second auxiliary valve port 330. Water flows within the jetting device 500, creating a siphon effect that draws brine from the salt tank into the device through the salt inlet 380 and the sixth auxiliary valve port 370. After mixing with water, the brine is ejected through the nozzle port 520 into the third auxiliary valve port 340, then flows from the fourth auxiliary valve port 350 into the second main valve port 160, and finally into the first treatment tank 800 through the fifth main valve port 190. After calcium and magnesium ion exchange, the wastewater passes through the first port 140, the fourth main valve port 180, and the fifth auxiliary valve port 360 before being discharged from the drain port 390. This achieves the function of supplying water to the second treatment tank 900 and absorbing brine from the first treatment tank 800.

[0115] Please refer to the following: Figure 12 and Figure 16 In some embodiments of this application, the second piston 400 is further configured to move to the fourth auxiliary valve position within the second inner cavity 310. When the second piston 400 is in the fourth auxiliary valve position, the passage between the first auxiliary valve port 320, the second auxiliary valve port 330, the third auxiliary valve port 340, and the fourth auxiliary valve port 350 is opened within the second inner cavity 310; the passage between the fifth auxiliary valve port 360 and the drain port 390 is opened; and the passages of the brine port 380 and the sixth auxiliary valve port 370 are closed. By setting the fourth auxiliary valve position of the second piston 400 within the second inner cavity 310, functions such as water supply to the first treatment tank 800 and backwashing of the second treatment tank 900, and backwashing of the first treatment tank 800 and water supply to the second treatment tank 900, can be achieved.

[0116] Please see Figure 12The first piston 200 is located in the second main valve position, and the second piston 400 is located in the fourth auxiliary valve position. Hard water enters the first inner cavity 110 from the inlet 120 of the first valve body 100, first passes through the first treatment tank 800 for softening treatment from the first port 140 of the first valve body 100, and then flows through the first inner cavity 110 through the second port 141 before exiting through the outlet 130. During this process, a portion of the soft water enters the first auxiliary valve port 320 through the first main valve port 150, and splits into two paths at the first auxiliary valve port 320. One path flows directly to the fourth auxiliary valve port 350, and the other path enters the jet inlet 510 of the jet device 500 through the second auxiliary valve port 330, is ejected through the nozzle port 520, enters the third auxiliary valve port 340, and merges at the fourth auxiliary valve port 350. Then, the water flows from the fourth auxiliary valve port 350 into the second main valve port 160, and then flows back into the second treatment tank 900 through the fourth port 143 to rinse the resin. The wastewater passes through the third main valve port 170, the fourth main valve port 180, and the fifth auxiliary valve port 360 before being discharged from the drain port 390. This achieves the function of supplying water to the first treatment tank 800 and backwashing the second treatment tank 900.

[0117] Please see Figure 16 The first piston 200 is located in the third main valve position, and the second piston 400 is located in the fourth auxiliary valve position. Hard water enters the first inner cavity 110 from the inlet 120 of the first valve body 100, first undergoes softening treatment in the second treatment tank 900 through the third port 142 of the first valve body 100, and then flows through the first inner cavity 110 through the fourth port 143 before exiting through the outlet 130. During this process, a portion of the soft water enters the first auxiliary valve port 320 through the first main valve port 150, and splits into two paths at the first auxiliary valve port 320. One path flows directly to the fourth auxiliary valve port 350, and the other path enters the jet inlet 510 of the jet device 500 through the second auxiliary valve port 330, is ejected through the nozzle port 520, enters the third auxiliary valve port 340, and merges at the fourth auxiliary valve port 350. Then, the water flows from the fourth auxiliary valve port 350 into the second main valve port 160, and then flows back into the first treatment tank 800 through the fifth main valve port 190 to rinse the resin. The wastewater passes through the first port 140, the fourth main valve port 180, and the fifth auxiliary valve port 360 before being discharged from the drain port 390. This achieves the function of supplying water to the second treatment tank 900 and backwashing the first treatment tank 800.

[0118] Please refer to the following: Figure 13 and Figure 17In some embodiments of this application, the second piston 400 is further configured to move to the fifth auxiliary valve position within the second inner cavity 310. When the second piston 400 is in the fifth auxiliary valve position, the passage between the first auxiliary valve port 320, the second auxiliary valve port 330, and the fifth auxiliary valve port 360 is opened within the second inner cavity 310; the passage between the third auxiliary valve port 340, the fourth auxiliary valve port 350, and the drain port 390 is opened; and the passages of the brine port 380 and the sixth auxiliary valve port 370 are closed. By setting the fifth auxiliary valve position of the second piston 400 within the second inner cavity 310, functions such as supplying water to the first treatment tank 800 and performing a backwash on the second treatment tank 900, and vice versa, can be achieved.

[0119] Please see Figure 13 The first piston 200 is located in the second main valve position, and the second piston 400 is located in the fifth auxiliary valve position. Hard water enters the first inner cavity 110 from the inlet 120 of the first valve body 100, first passes through the first treatment tank 800 for softening treatment via the first port 140 of the first valve body 100, then flows through the first inner cavity 110 via the second port 141, and exits through the outlet 130. During this process, a portion of the softened water enters the first auxiliary valve port 320 via the first main valve port 150, flows to the fifth auxiliary valve port 360, and then flows forward into the second treatment tank 900 via the fourth main valve port 180 and the third main valve port 170 to rinse the resin. Wastewater passes through the flow channel 430 of the second piston 400 via the fourth port 143, the second main valve port 160, the fourth auxiliary valve port 350, and the drain channel 430 of the second piston 400, and is discharged from the drain port 390. This achieves the water supply function of the first treatment tank 800 and the forward washing function of the second treatment tank 900.

[0120] Please see Figure 17 The first piston 200 is located in the third main valve position, and the second piston 400 is located in the fifth auxiliary valve position. Hard water enters the first inner cavity 110 from the inlet 120 of the first valve body 100, first passes through the second treatment tank 900 for softening treatment via the third port 142 of the first valve body 100, and then flows through the first inner cavity 110 via the fourth port 143 before exiting through the outlet 130. During this process, a portion of the softened water enters the first auxiliary valve port 320 via the first main valve port 150, and then flows forward into the first treatment tank 800 via the fourth main valve port 180 and the first port 140 to rinse the resin. Wastewater passes through the fifth main valve port 190, the second main valve port 160, the fourth auxiliary valve port 350, and the flow passage 430 of the second piston 400 before being discharged from the drain port 390. This achieves the function of forward rinsing in the first treatment tank 800 and water supply in the second treatment tank 900.

[0121] Please see Figure 18In some embodiments of this application, the second piston 400 is further configured to move to the sixth auxiliary valve position within the second inner cavity 310. When the second piston 400 is in the sixth auxiliary valve position, the passages between the first auxiliary valve port 320, the second auxiliary valve port 330, and the fifth auxiliary valve port 360 are opened within the second inner cavity 310, as are the passages between the third auxiliary valve port 340 and the fourth auxiliary valve port 350. The passages of the salt port 380, the sixth auxiliary valve port 370, and the drain port 390 are all closed. By setting the sixth auxiliary valve position of the second piston 400 within the second inner cavity 310, the bypass function of the control valve can be realized.

[0122] Specifically, such as Figure 18 After the hard water enters the first inner cavity 110 through the inlet 120 of the first valve body 100, it passes sequentially through the third main valve port 170, the fourth main valve port 180, the fifth auxiliary valve port 360, the first auxiliary valve port 320, and the first main valve port 150 before being discharged from the outlet 130. During this process, other flow paths are closed due to the reverse obstruction of the jet device 500 and the internal pressure of the flow paths, preventing water from passing through the first treatment tank 800 and the second treatment tank 900, thus achieving the bypass function of the control valve.

[0123] It should be noted that the second piston 400 can move along its axial direction in the second inner cavity 310 to switch between the first auxiliary valve position, the second auxiliary valve position, the third auxiliary valve position, the fourth auxiliary valve position, the fifth auxiliary valve position, and the sixth auxiliary valve position. The first auxiliary valve position, the second auxiliary valve position, the third auxiliary valve position, the fourth auxiliary valve position, the fifth auxiliary valve position, and the sixth auxiliary valve position correspond to different positions in the second inner cavity 310.

[0124] Please refer to them again. Figure 1 and Figure 4 In some embodiments of this application, the control valve further includes a plurality of secondary valve sealing grilles 700. These secondary valve sealing grilles 700 are arranged at intervals along the axial direction of the second piston 400 in the second inner cavity 310, dividing the second inner cavity 310 into a plurality of secondary chambers 311. A first secondary valve port 320, a second secondary valve port 330, a third secondary valve port 340, a fourth secondary valve port 350, a fifth secondary valve port 360, a sixth secondary valve port 370, a salt port 380, and a drain port 390 are respectively connected to their corresponding secondary chambers 311. By connecting two secondary chambers 311, the corresponding ports of the two secondary chambers 311 (i.e., the aforementioned secondary valve port, salt port, and drain port) can also be connected. The secondary valve sealing grilles 700 are configured to be able to seal with the second piston 400, thereby isolating the secondary chambers 311 located on both sides of the secondary valve sealing grilles 700. The secondary valve sealing grille 700 is also configured to be spaced apart from the second piston 400 so that the secondary chambers 311 located on both sides of the secondary valve sealing grille 700 are in communication with each other.

[0125] Optionally, the secondary valve sealing grille 700 includes a secondary valve grille body and a secondary valve sealing gasket. The secondary valve grille body is annular, and both its inner and outer circumferential surfaces are provided with sealing grooves, and each is fitted with a secondary valve sealing gasket. The secondary valve sealing gasket on the outer circumferential surface is sealed to the inner wall of the second valve body 300, and the secondary valve sealing gasket on the inner circumferential surface can be sealed to the second piston 400.

[0126] Please see Figure 5 The second piston 400 includes multiple auxiliary valve sealing steps 410, which are arranged at intervals along the axial direction of the second piston 400. A secondary valve water passage groove 420 is formed between adjacent auxiliary valve sealing steps 410. The diameter of the second piston 400 at the auxiliary valve sealing steps 410 is larger than the diameter at the secondary valve water passage groove 420. When the second piston 400 moves, the auxiliary valve sealing grille 700 is sealed to the auxiliary valve sealing steps 410, isolating the auxiliary chambers 311 located on both sides of the auxiliary valve sealing grille 700. When the second piston 400 moves, the auxiliary valve sealing grille 700 is located at the auxiliary valve water passage groove 420, meaning that the auxiliary valve sealing grille 700 is not sealed to any of the auxiliary valve sealing steps 410. In this case, the corresponding auxiliary valve water passage groove 420 connects to the auxiliary chambers 311 located on both sides of the auxiliary valve sealing grille 700.

[0127] Optionally, the second piston 400 has a flow passage 430 for connecting at least two secondary chambers 311. When the second piston 400 is in the fifth secondary valve position, the flow passage 430 connects the fourth secondary valve port 350 and the drain port 390.

[0128] Please refer to it again. Figure 4 and Figure 5 In some embodiments of this application, the second inner cavity 310 includes a secondary valve cavity 312 and a salt valve cavity 313 arranged axially along the second piston 400 and interconnected. The second piston 400 includes a secondary valve piston 401 and a salt valve piston 402 arranged axially and interconnected. The secondary valve piston 401 is disposed in the secondary valve cavity 312, and at least a portion of the salt valve piston 402 is disposed in the salt valve cavity 313. A first secondary valve port 320, a second secondary valve port 330, a third secondary valve port 340, a fourth secondary valve port 350, a fifth secondary valve port 360, and a drain port 390 are correspondingly disposed in the secondary valve cavity 312, and a salt port 380 and a sixth secondary valve port 370 are correspondingly disposed in the salt valve cavity 313. The diameter of the salt valve cavity 313 is smaller than the diameter of the secondary valve cavity 312, and the diameter of the salt valve piston 402 is smaller than the diameter of the secondary valve piston 401.

[0129] Accordingly, this application also provides a water treatment device, comprising: a first treatment tank 800, a second treatment tank 900, and a control valve as described in any of the above embodiments. The first port 140 of the control valve is connected to the first treatment chamber 810 of the first treatment tank 800, the second port 141 of the control valve is connected to the first central pipe 820 of the first treatment tank 800, the third port 142 of the control valve is connected to the second treatment chamber 910 of the second treatment tank 900, and the fourth port 143 of the control valve is connected to the second central pipe 920 of the second treatment tank 900. This water treatment device can be applied to applications requiring water softening, performing two softening processes to soften water with high hardness. It can also be applied to integrated softening and purification applications, simultaneously providing both soft and purified water, offering a better option for whole-house water treatment solutions. This water treatment device can achieve simultaneous treatment by two tanks connected in series, one for use and one for standby, and independent regeneration of both tanks without interference, enabling uninterrupted and continuous water supply. This water treatment equipment is highly integrated, saving space and reducing costs; in addition, it has richer functions and is suitable for more application scenarios.

[0130] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0131] The control valve and water treatment equipment provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A control valve, characterized in that, include: The first valve body (100) has a first inner cavity (110), an inlet (120), an outlet (130), a first port (140), a second port (141), a third port (142), and a fourth port (143). The first port (140) is used to connect to the first processing chamber (810) of the first processing tank (800), the second port (141) is used to connect to the first central tube (820) of the first processing tank (800), the third port (142) is used to connect to the second processing chamber (910) of the second processing tank (900), and the fourth port (143) is used to connect to the second central tube (920) of the second processing tank (900). A first piston (200) is disposed in the first inner cavity (110) and is configured to move to the first main valve position in the first inner cavity (110). When the first piston (200) is in the first main valve position, the passage between the inlet (120) and the first port (140), the passage between the second port (141) and the third port (142), and the passage between the fourth port (143) and the outlet (130) are all opened in the first inner cavity (110).

2. The control valve according to claim 1, characterized in that, The first valve body (100) further comprises one or more of a first main valve port (150), a second main valve port (160), a third main valve port (170), a fourth main valve port (180), and a fifth main valve port (190); and the control valve further satisfies at least one of the following conditions: The third main valve port (170) is connected to the third port (142); The fourth main valve port (180) is connected to the second port (141); When the first piston (200) is in the first main valve position, the passage between the first main valve port (150), the liquid outlet (130) and the fourth port (143) in the first inner cavity (110) is opened, and the passages of the second main valve port (160), the third main valve port (170), the fourth main valve port (180) and the fifth main valve port (190) are all closed.

3. The control valve according to claim 2, characterized in that, The first piston (200) is also configured to move to the second main valve position in the first inner cavity (110). When the first piston (200) is in the second main valve position, the passage between the second port (141), the liquid outlet (130) and the first main valve port (150) in the first inner cavity (110) is opened, and the passage between the liquid inlet (120) and the first port (140), the passage between the fourth port (143) and the second main valve port (160), and the passage between the third main valve port (170) and the fourth main valve port (180) are all opened, while the passage of the third port (142) and the passage of the fifth main valve port (190) are closed.

4. The control valve according to claim 2, characterized in that, The first piston (200) is also configured to move to the third main valve position in the first inner cavity (110). When the first piston (200) is in the third main valve position, the passage between the fourth port (143), the liquid outlet (130) and the first main valve port (150) in the first inner cavity (110) is opened, and the passage between the liquid inlet (120) and the third port (142), the passage between the second main valve port (160) and the fifth main valve port (190), and the passage between the first port (140) and the fourth main valve port (180) are all opened, while the passage of the second port (141) and the passage of the third main valve port (170) are closed.

5. The control valve according to claim 2, characterized in that, The first piston (200) is also configured to move to the fourth main valve position in the first inner cavity (110). When the first piston (200) is in the fourth main valve position, in the first inner cavity (110), the passage between the first port (140), the third main valve port (170) and the fourth main valve port (180) is opened, the passage between the fourth port (143), the second main valve port (160) and the fifth main valve port (190) is opened, and the passage between the inlet port (120) and the third port (142), and the passage between the first main valve port (150) and the outlet port (130) are all opened, while the passage of the second port (141) is closed.

6. The control valve according to claim 2, characterized in that, The first piston (200) is also configured to move to a fifth main valve position in the first inner cavity (110), and when the first piston (200) is in the fifth main valve position, the passage of the inlet (120) in the first inner cavity (110) is closed.

7. The control valve according to claim 2, characterized in that, The control valve also includes: Multiple main valve sealing grilles (600) are arranged at intervals along the axial direction of the first piston (200) in the first inner cavity (110) to divide the first inner cavity (110) into multiple main chambers (111). The inlet (120), the outlet (130), the first port (140), the second port (141), the third port (142), the fourth port (143), the first main valve port (150), the second main valve port (160), the third main valve port (170), the fourth main valve port (180), and the fifth main valve port (190) are respectively connected to the corresponding main chambers (111). The main valve sealing grille (600) is configured to be able to be sealed to the first piston (200) to isolate the main chamber (111) located on both sides of the main valve sealing grille (600); The main valve sealing grille (600) is also configured to be spaced apart from the first piston (200) so that the main chambers (111) located on both sides of the main valve sealing grille (600) are in communication with each other.

8. The control valve according to claim 7, characterized in that, The first piston (200) includes: Multiple main valve sealing steps (210) are arranged at intervals along the axial direction of the first piston (200), and a main valve water passage groove (220) is formed between two adjacent main valve sealing steps (210); The main valve sealing grille (600) is sealed to the main valve sealing step (210) to isolate the main chamber (111) located on both sides of the main valve sealing grille (600); The main valve sealing grille (600) is located at the main valve water passage (220) to connect the main chamber (111) located on both sides of the main valve sealing grille (600) through the main valve water passage (220).

9. The control valve according to claim 8, characterized in that, Multiple main valve water passages (220) are arranged at intervals along the axial direction of the first piston (200), with the two outermost main valve water passages (220) having the same width.

10. The control valve according to claim 7, characterized in that, Among the plurality of main valve sealing grilles (600), the minimum spacing between two adjacent main valve sealing grilles (600) is L. min The maximum spacing is L max ,satisfy: L min / L max ≤1 / 2.

11. The control valve according to any one of claims 1 to 10, characterized in that, The control valve also includes: The second valve body (300) has a second inner cavity (310), a first auxiliary valve port (320), a second auxiliary valve port (330), a third auxiliary valve port (340), and a salt port (380). The first auxiliary valve port (320) is connected to the first main valve port (150), and the salt port (380) is used to connect to the salt tank. A second piston (400) is disposed in the second inner cavity (310) and is configured to move to the first auxiliary valve position in the second inner cavity (310). When the second piston (400) is in the first auxiliary valve position, the passage between the first auxiliary valve port (320) and the second auxiliary valve port (330), the passage between the first auxiliary valve port (320) and the salt port (380), and the passage between the third auxiliary valve port (340) and the salt port (380) are all opened in the second inner cavity (310). The jet device (500) has a jet inlet (510) and a nozzle port (520) connected together. The jet inlet (510) is configured to communicate with the second auxiliary valve port (330), and the nozzle port (520) is configured to communicate with the third auxiliary valve port (340).

12. The control valve according to claim 11, characterized in that, The second valve body (300) further includes one or more of a fourth auxiliary valve port (350), a fifth auxiliary valve port (360), a sixth auxiliary valve port (370), and a drain port (390); and the control valve also satisfies at least one of the following conditions: The fourth auxiliary valve port (350) is connected to the second main valve port (160); The fifth auxiliary valve port (360) is connected to the fourth main valve port (180); The sixth auxiliary valve port (370) is connected to the siphon port (530) of the jet device (500), and the siphon port (530) is connected to the jet inlet (510) and the nozzle port (520); When the second piston (400) is in the first sub-valve position, in the second inner cavity (310), the passage between the first sub-valve port (320), the second sub-valve port (330), the third sub-valve port (340), the fourth sub-valve port (350), and the salt port (380) is opened, and the passage of the fifth sub-valve port (360), the passage of the sixth sub-valve port (370), and the passage of the drain port (390) are closed.

13. The control valve according to claim 12, characterized in that, The second piston (400) is also configured to move to the second auxiliary valve position in the second inner cavity (310). When the second piston (400) is in the second auxiliary valve position, in the second inner cavity (310), the passage between the first auxiliary valve port (320) and the second auxiliary valve port (330), the passage between the third auxiliary valve port (340) and the fourth auxiliary valve port (350) are all opened, and the passages of the salt port (380), the fifth auxiliary valve port (360), the sixth auxiliary valve port (370) and the drain port (390) are all closed.

14. The control valve according to claim 12, characterized in that, The second piston (400) is also configured to move to the third auxiliary valve position in the second inner cavity (310). When the second piston (400) is in the third auxiliary valve position, the passage between the first auxiliary valve port (320) and the second auxiliary valve port (330), the passage between the third auxiliary valve port (340) and the fourth auxiliary valve port (350), the passage between the salt port (380) and the sixth auxiliary valve port (370), and the passage between the fifth auxiliary valve port (360) and the drain port (390) are all opened in the second inner cavity (310).

15. The control valve according to claim 12, characterized in that, The second piston (400) is also configured to move to the fourth sub-valve position in the second inner cavity (310). When the second piston (400) is in the fourth sub-valve position, in the second inner cavity (310), the passage between the first sub-valve port (320), the second sub-valve port (330), the third sub-valve port (340) and the fourth sub-valve port (350) is opened, the passage between the fifth sub-valve port (360) and the drain port (390) is opened, and the passage of the salt port (380) and the passage of the sixth sub-valve port (370) are closed.

16. The control valve according to claim 12, characterized in that, The second piston (400) is also configured to move to the fifth sub-valve position in the second inner cavity (310). When the second piston (400) is in the fifth sub-valve position, the passage between the first sub-valve port (320), the second sub-valve port (330) and the fifth sub-valve port (360) in the second inner cavity (310) is opened, the passage between the third sub-valve port (340), the fourth sub-valve port (350) and the drain port (390) is opened, and the passage of the salt port (380) and the passage of the sixth sub-valve port (370) are closed.

17. The control valve according to claim 12, characterized in that, The second piston (400) is also configured to move to the sixth sub-valve position in the second inner cavity (310). When the second piston (400) is in the sixth sub-valve position, the passage between the first sub-valve port (320), the second sub-valve port (330) and the fifth sub-valve port (360) is opened in the second inner cavity (310), the passage between the third sub-valve port (340) and the fourth sub-valve port (350) is opened, and the passages of the salt port (380), the sixth sub-valve port (370) and the drain port (390) are all closed.

18. The control valve according to claim 12, characterized in that, The control valve also includes: Multiple auxiliary valve sealing grilles (700) are arranged at intervals along the axial direction of the second piston (400) in the second inner cavity (310) to divide the second inner cavity (310) into multiple auxiliary chambers (311). The first auxiliary valve port (320), the second auxiliary valve port (330), the third auxiliary valve port (340), the fourth auxiliary valve port (350), the fifth auxiliary valve port (360), the sixth auxiliary valve port (370), the salt port (380), and the sewage port (390) are respectively connected to the corresponding auxiliary chambers (311). The secondary valve sealing grille (700) is configured to be able to be sealed to the second piston (400) to isolate the secondary chambers (311) located on both sides of the secondary valve sealing grille (700); The secondary valve sealing grille (700) is also configured to be spaced apart from the second piston (400) so that the secondary chambers (311) located on both sides of the secondary valve sealing grille (700) are in communication with each other.

19. The control valve according to claim 18, characterized in that, The second piston (400) includes: Multiple secondary valve sealing steps (410) are arranged at intervals along the axial direction of the second piston (400), and a secondary valve water passage groove (420) is formed between two adjacent secondary valve sealing steps (410); The secondary valve sealing grille (700) is sealed to the secondary valve sealing step (410) to isolate the secondary chambers (311) located on both sides of the secondary valve sealing grille (700); The secondary valve sealing grille (700) is located at the secondary valve water passage (420) to connect the secondary chambers (311) located on both sides of the secondary valve sealing grille (700) through the secondary valve water passage (420).

20. The control valve according to claim 18, characterized in that, The second piston (400) has a flow passage (430) for connecting at least two of the sub-chambers (311).

21. The control valve according to claim 12, characterized in that, The second inner cavity (310) includes a secondary valve cavity (312) and a salt valve cavity (313) arranged axially along the second piston (400) and communicating with each other. The second piston (400) includes a secondary valve piston (401) and a salt valve piston (402) arranged axially and communicating with each other. The secondary valve piston (401) is disposed in the secondary valve cavity (312), and at least a portion of the salt valve piston (402) is disposed in the salt valve cavity (313). The first auxiliary valve port (320), the second auxiliary valve port (330), the third auxiliary valve port (340), the fourth auxiliary valve port (350), the fifth auxiliary valve port (360), and the drain port (390) are respectively disposed at the auxiliary valve chamber (312), and the salt port (380) and the sixth auxiliary valve port (370) are respectively disposed at the salt valve chamber (313).

22. The control valve according to claim 11, characterized in that, The jetting device (500) includes a check valve (540) disposed at the nozzle port (520) to block liquid flowing from the third auxiliary valve port (340) to the nozzle port (520).

23. A water treatment device, characterized in that, include: The first processing tank (800), the second processing tank (900), and the control valve as described in any one of claims 1 to 22, wherein the first port (140) of the control valve is connected to the first processing chamber (810) of the first processing tank (800), the second port (141) of the control valve is connected to the first central tube (820) of the first processing tank (800), the third port (142) of the control valve is connected to the second processing chamber (910) of the second processing tank (900), and the fourth port (143) of the control valve is connected to the second central tube (920) of the second processing tank (900).

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