Water purification system, purification and heating all-in-one machine and control method of water purification system

Abstract

The invention relates to the technical field of water purification, and discloses a water purification system, a purification and heating all-in-one machine and a control method of the water purification system. The water purification system has a non-regeneration mode and a regeneration mode. The water purification system comprises a connecting pipeline; the cooking unit comprises a heating unit and a heat exchange unit, and the heat exchange unit is communicated with the heating unit and is suitable for cooling boiling water of the heating unit to obtain warm water; the filtering unit comprises a front carbon filter element; and the control valve assembly is arranged in the connecting pipeline. The control valve assembly is suitable for controlling the water purification system to be switched between a non-regeneration mode and a regeneration mode, the regeneration mode is started when the carbon filter element reaches or is close to a saturated state, and the regeneration of the carbon filter element is realized through back flushing; and warm water is used for regenerating the front carbon filter element, so that the service life and the element replacement period of the carbon filter element are effectively prolonged, the material damage to the carbon filter element is avoided compared with boiling water, and the regeneration effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, and in particular to a water purification system, a water purification and heat integrated machine, and a control method for the water purification system. Background Art

[0002] The all-in-one water purification and heating machine refers to a new type of water purification equipment that integrates water purification and heating functions. It eliminates the steps of collecting purified water and then boiling water, and realizes pure hot water that can be drunk immediately after opening.

[0003] The water purification system of the integrated water heater generally includes a pre-treatment filter and a reverse osmosis filter. The reverse osmosis filter (RO filter) achieves deep water purification through the nanochannels on the polyamide separation layer on the surface of the reverse osmosis membrane. However, the polyamide separation layer has poor tolerance to oxidizing substances, and its pleated structure is easily damaged. In order to effectively extend the life of the RO filter, the industry often uses pre-treatment to ensure the quality of its inlet water. The water quality requirements mainly include turbidity, SDI 15 The PP cotton and ultrafiltration in the pre-treatment filter can effectively reduce the turbidity and SDI of water. 15 However, only the carbon filter can effectively remove residual chlorine. Therefore, the carbon filter is an indispensable component of the pre-treatment filter of the water purifier. Although optimizing the material, manufacturing method and increasing the dosage can improve its water purification performance and life to a certain extent, the effect is limited. The carbon filter always has a saturation failure point, and it still needs to be disassembled and replaced, which causes inconvenience. It can be seen that the carbon filter in the water purification system in the related technology has a short life and needs to be replaced frequently, which causes inconvenience to users. Summary of the invention

[0004] In view of this, the present invention provides a water purification system, a water purification and heat all-in-one machine and a control method of the water purification system to solve the problem that the carbon filter element has a short life and frequent replacement causes inconvenience to users.

[0005] In a first aspect, the present invention provides a water purification system having a non-regeneration mode and a regeneration mode, the water purification system comprising:

[0006] Connecting pipes;

[0007] The cooking unit comprises a heating unit and a heat exchange unit, wherein the heating unit is adapted to heat water to boil water; the heat exchange unit is connected to the heating unit and is adapted to cool the boiling water to obtain warm water;

[0008] A filter unit, the filter unit comprising a pre-carbon filter element, wherein in the non-regeneration mode, the pre-carbon filter element is located upstream of the cooking unit in the water flow direction; in the regeneration mode, the pre-carbon filter element is located downstream of the cooking unit in the water flow direction, so that the warm water reversely flushes and regenerates the pre-carbon filter element;

[0009] A control valve assembly is disposed in the connecting pipeline, and the control valve assembly is suitable for controlling the water purification system to switch between the non-regeneration mode and the regeneration mode.

[0010] Beneficial effects: The present invention changes the flow path and direction of water in the connecting pipeline by controlling and adjusting the control valve assembly disposed in the connecting pipeline, so that the water purification system can flexibly switch between the non-regeneration mode and the regeneration mode, and then start the regeneration mode when the carbon filter element reaches or approaches the saturation state, and reverse flushing realizes the regeneration of the carbon filter element; the heat exchange unit in the water purification system can cool the boiling water produced by the heating unit to form warm water, and use the temperature effect to break the adsorption balance of the pre-carbon filter element, so that the adsorption is reversed, that is, the pollutants are desorbed, and the regeneration effect is achieved, which effectively extends the life of the carbon filter element and the core replacement cycle. Moreover, compared with boiling water, the use of warm water for regeneration will not cause material damage to the carbon filter element, and the use of warm water to extend the life of the carbon filter element is more effective. Moreover, the flushing warm water in the present invention is obtained by cooling the boiling water through the heat exchange unit, and there is no need to change the heating temperature of the system, so the impact on the purification system is minimal and will not affect the use of users.

[0011] In an optional embodiment, the filter unit further includes a fine filter element; the connecting pipeline includes:

[0012] An external water inlet pipe, connected to the pre-carbon filter element, suitable for introducing an external water source into the water purification system;

[0013] A fine filter water inlet pipe is connected between the pre-carbon filter element and the fine filter element;

[0014] A pure water pipe, adapted to transport purified pure water to the cooking unit;

[0015] A boiling water intake pipe is connected between the cooking unit and the boiling water outlet of the water purification system;

[0016] A warm water intake pipe is connected between the cooking unit and the warm water inlet of the water purification system;

[0017] A water storage connecting pipe, wherein a first end of the water storage connecting pipe is connected to a water storage unit, and a second end of the water storage connecting pipe is connected to the pure water pipe;

[0018] A regeneration flushing pipe, connected and arranged between the warm water intake pipe and the fine filter water inlet pipe;

[0019] The regeneration drainage pipe is arranged in parallel with the external water inlet pipe and is suitable for discharging the regenerated water.

[0020] Beneficial effects: In non-regeneration mode, the external water inlet pipe introduces the external water source into the water purification system. After primary filtration by the pre-carbon filter element, the water enters the fine filter element through the fine filter inlet pipe for fine filtration. The finely filtered water enters the heat exchange unit and the heating unit through the pure water pipe for cooking, and then is connected to the boiling water outlet or the warm water outlet through the boiling water intake pipe or the warm water intake pipe to supply water to the user; in regeneration mode, the water in the water storage unit enters the cooking unit through the water storage connection pipe. The warm water formed after heating and heat exchange enters the pre-carbon filter element through the regeneration flushing pipe for reverse flushing, and the adsorption balance of the pre-carbon filter element is broken by the temperature effect, so that the pollutants are desorbed and the regeneration purpose of the pre-carbon filter element is achieved. In addition, the regeneration flushing pipe is directly led out from the warm water intake pipe of the cooking unit, and there is no need to design a dedicated waterway, which simplifies the pipeline structure of the water purification system.

[0021] In an optional embodiment, the control valve assembly includes:

[0022] A first valve body is disposed in the external water inlet pipe;

[0023] A second valve body is arranged in the fine filter water inlet pipe;

[0024] A third valve body is disposed in the pure water pipe;

[0025] a fourth valve body, disposed in the regeneration flushing pipe;

[0026] a fifth valve body, disposed in the regeneration drain pipe;

[0027] In the non-regeneration mode, the fourth valve body and the fifth valve body are in a closed state; in the regeneration mode, the first valve body and the second valve body are in a closed state.

[0028] Beneficial effect: By arranging the first valve body, the second valve body, the third valve body, the fourth valve body and the fifth valve body in the connecting pipeline, it is convenient to realize the connection and disconnection of any pipeline including the external water inlet pipe, the fine filter water inlet pipe, the pure water pipe, the regeneration flushing pipe and the regeneration drain pipe, thereby changing the water flow path and the water flow direction, and realizing the switching of the water purification system between the non-regeneration mode and the regeneration mode. Without changing the structure of the water purification system, reliable water production can be guaranteed while achieving effective regeneration. The pre-carbon filter element does not need to be replaced, which improves convenience and reduces the cost of replacing the filter element.

[0029] In an optional embodiment, the filter unit further includes a first post-carbon filter element, and the first post-carbon filter element is disposed in the pure water pipe.

[0030] Beneficial effect: The first post-carbon filter element arranged in the pure water pipe can purify the water entering the cooking unit from the water storage unit in the regeneration mode, preventing the water stored in the water storage unit for a long time from polluting the water purification system, thereby ensuring the safety of water quality.

[0031] In an optional embodiment, the filter unit further includes a second post-carbon filter element, which is compositely arranged with the pre-carbon filter element; a post-carbon filter water inlet pipe is arranged between the second post-carbon filter element and the fine filter element.

[0032] Beneficial effects: The second post-carbon filter element can improve the taste of water after fine filtration and increase user satisfaction; the second post-carbon filter element and the front carbon filter element are combined into a shell, and the water purification system structure is more compact; in non-regeneration mode, water filtered by the fine filtration element enters the second post-carbon filter element through the post-carbon filter water inlet pipe, and then enters the pure water pipe after filtration.

[0033] In an optional embodiment, the temperature of the warm water ranges from 35°C to 60°C.

[0034] Beneficial effects: The temperature range of warm water used for regenerating carbon filter elements is 35℃~60℃. Compared with water at room temperature, the increase in temperature increases the activity of pollutants. Temperature acts as an external force to drive the desorption of pollutants, thereby improving the desorption efficiency. Compared with hot water with a water temperature higher than 60℃, it will not cause material damage to the carbon filter element, and will not affect the extension of the carbon filter element's life due to excessively high water temperature, causing a counter-effect.

[0035] In a second aspect, the present invention further provides a water purification and heating all-in-one machine, comprising any of the water purification systems described above.

[0036] Beneficial effect: Since the integrated water purification and heat machine includes the water purification system of the present invention, it has the same technical effect as the water purification system of the present invention, which will not be repeated here.

[0037] In a third aspect, the present invention further provides a control method for a water purification system, which is applicable to any of the water purification systems or the water purification and heating integrated machine described above, and the control method comprises the following steps:

[0038] Get the cumulative clean water volume Q of the pre-carbon filter and the preset regeneration point flow Q n Alignment, n is the number of regenerations;

[0039] Determine whether Q=Q n ;

[0040] If Q=Q n , control the water purification system to enter the state of waiting for regeneration;

[0041] When the regeneration conditions are met, the control starts the regeneration mode.

[0042] Beneficial effect: preset regeneration point flow Q n It is the cumulative amount of clean water corresponding to the time when the pre-carbon filter element reaches the adsorption saturation state, Q = Q n It indicates that the pre-carbon filter has reached the adsorption saturation state and needs to be regenerated. At this time, the water purification system can be controlled to enter the regeneration state to prepare for starting the regeneration mode.

[0043] In an optional embodiment, the regeneration mode includes the following control steps:

[0044] Get the water level h of the water storage unit and the water temperature T of the heating unit, respectively, and compare them with the preset water level h 满 and preset water temperature T 沸 Compare;

[0045] Determine whether h=h 满 and T = T 沸 ;

[0046] If h=h 满 and T = T 沸 , control the regulating control valve assembly, and reversely flush the pre-carbon filter element with warm water.

[0047] Beneficial effects: In the regeneration mode, it is necessary to first determine whether the regeneration conditions are met. The water storage unit must be full of water to ensure a continuous supply of flushing water, and the water in the heating unit must be in a boiling and insulating state to provide regeneration warm water that meets the requirements. Therefore, the regeneration conditions include the water storage unit being full of water, and the water in the heating unit being in a boiling and insulating state. Regeneration can only be started when both the water fullness and boiling and insulating conditions are met at the same time; the water level of the water storage unit is used as the basis for judging whether the water is full or not, which has high reliability, and the detected water temperature is directly used as the basis for judging whether to enter the boiling and insulating state, which is direct and accurate.

[0048] In an optional implementation, if h=h is not satisfied at the same time 满 and T = T 沸 , then the regulating control valve assembly is controlled to start water replenishment, and / or the heating unit is controlled to start or the heating unit continues heating until both h=h 满 and T = T 沸 .

[0049] Beneficial effect: when different, h=h 满 and T = T 沸 , indicating that the water purification system does not meet the regeneration conditions. If the water is not full, it is necessary to start replenishing water until the water is full. If the temperature does not reach the preset boiling temperature, start heating or continue heating until the water in the heating unit reaches the boiling and insulation state.

[0050] In an optional embodiment, after the warm water reverse flushes the pre-carbon filter, the pre-carbon filter cooling step is also included:

[0051] Control closing of control valve assembly;

[0052] Obtain the water temperature T1 in the pre-carbon filter element and compare it with the preset target temperature T0;

[0053] Determine whether T1=T0;

[0054] If T1=T0 is satisfied, the control starts the non-regeneration mode.

[0055] Beneficial effect: After the warm water reverse flushing is completed, the front carbon filter element is cooled to prevent the high-temperature water in the carbon filter element in the non-regeneration mode from entering the rear-end non-high-temperature resistant components, causing component damage and affecting the reliability of the water purification system.

[0056] In an optional implementation, if T1=T0 is not satisfied, control is performed to start normal temperature water replacement or natural cooling until T1=T0 is satisfied.

[0057] Beneficial effect: If the water in the pre-carbon filter element has not cooled to the target value after the warm water reverse flush is completed, it can be quickly cooled by starting the normal temperature water replacement method, or it can wait for a period of time to allow the water in the carbon filter element to cool naturally to the target temperature.

[0058] In an optional embodiment, the regeneration conditions include:

[0059] Get time information t, and idle time t 闲 Or compare the idle time period [t1, t2];

[0060] Determine whether t=t 闲 or t∈[t1,t2];

[0061] If t=t 闲 Or t∈[t1, t2], control starts the regeneration mode.

[0062] Beneficial effect: Setting an idle time point or idle time period is used to indicate that the water purification system is not in water production mode. When in idle time, it can enter the regeneration mode to regenerate the pre-carbon filter element. The pre-carbon filter element is only regenerated in idle time, which will not affect the user's normal water production and water use, and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0064] Figure 1 This is a schematic structural diagram of a water purification system according to an embodiment of the present invention;

[0065] Figure 2 for Figure 1 Schematic diagram of pipeline connection of medium water purification system in non-regeneration mode, where solid lines represent connected pipelines and dashed lines represent disconnected pipelines;

[0066] Figure 3 for Figure 1 Schematic diagram of pipeline connection of the medium water purification system in regeneration mode, where the solid lines represent connected pipelines and the dotted lines represent disconnected pipelines;

[0067] Figure 4 It is a structural schematic diagram of another water purification system according to an embodiment of the present invention;

[0068] Figure 5 for Figure 4 Schematic diagram of pipeline connection of medium water purification system in non-regeneration mode, where solid lines represent connected pipelines and dashed lines represent disconnected pipelines;

[0069] Figure 6 for Figure 4 Schematic diagram of pipeline connection of the medium water purification system in regeneration mode, where the solid lines represent connected pipelines and the dotted lines represent disconnected pipelines;

[0070] Figure 7 Schematic diagram of a first control method of a water purification system according to an embodiment of the present invention;

[0071] Figure 8 Schematic diagram of a second control method for a water purification system according to an embodiment of the present invention;

[0072] Fig. 9 Schematic diagram of a third control method for a water purification system according to an embodiment of the present invention;

[0073] Fig.10 Schematic diagram of a fourth control method for a water purification system according to an embodiment of the present invention;

[0074] Fig.11 Schematic diagram of a fifth control method for a water purification system according to an embodiment of the present invention.

[0075] Description of reference numerals:

[0076] 100. Connect the pipeline;

[0077] 101, external water inlet pipe; 102, fine filter water inlet pipe; 103, pure water pipe; 104, boiled water intake pipe; 105, warm water intake pipe; 106, water storage connection pipe; 107, regeneration flushing pipe; 108, regeneration drain pipe; 109, post-carbon filter water inlet pipe;

[0078] 1. Cooking unit;

[0079] 11. Heating unit; 12. Heat exchange unit;

[0080] 2. Filter unit;

[0081] 21. Pre-carbon filter element; 22. Fine filter element; 23. First post-carbon filter element; 24. Carbon composite filter element;

[0082] 3. Control valve assembly;

[0083] 31. first valve body; 32. second valve body; 33. third valve body; 34. fourth valve body; 35. fifth valve body;

[0084] 4. Check valve;

[0085] 5. Pumping device;

[0086] 6. Thermostatic valve;

[0087] 7. Water storage unit. DETAILED DESCRIPTION

[0088] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0089] In the description of the invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0090] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0091] Combine the following Figures 1 to 11 , describing an embodiment of the present invention.

[0092] According to an embodiment of the present invention, on the one hand, Figure 1-Figure 6 As shown, a water purification system is provided, which has a non-regeneration mode and a regeneration mode, and the water purification system includes:

[0093] Connecting pipeline 100;

[0094] The cooking unit 1 includes a heating unit 11 and a heat exchange unit 12. The heating unit 11 is suitable for heating water to boil water; the heat exchange unit 12 is connected to the heating unit 11 and is suitable for cooling the boiling water to obtain warm water.

[0095] The filter unit 2 includes a pre-carbon filter element 21. In the non-regeneration mode, the pre-carbon filter element 21 is located upstream of the cooking unit 1 in the water flow direction; in the regeneration mode, the pre-carbon filter element 21 is located downstream of the cooking unit 1 in the water flow direction, so that the warm water reversely flushes and regenerates the pre-carbon filter element 21;

[0096] The control valve assembly 3 is disposed in the connecting pipeline 100 , and the control valve assembly 3 is suitable for controlling the water purification system to switch between the non-regeneration mode and the regeneration mode.

[0097] The present invention changes the flow path and direction of water in the connecting pipeline 100 by controlling and adjusting the control valve assembly 3 disposed in the connecting pipeline 100, so that the water purification system can flexibly switch between the non-regeneration mode and the regeneration mode, and then start the regeneration mode when the carbon filter element reaches or approaches the saturation state, and reverse flushing realizes the regeneration of the carbon filter element; the heat exchange unit 12 in the water purification system can cool the boiling water obtained by the heating unit 11 to form warm water, and use the temperature effect to break the adsorption balance of the pre-carbon filter element 21, so that the adsorption is reversed, that is, the pollutants are desorbed, and the regeneration effect is achieved, which effectively prolongs the life of the carbon filter element and the core replacement cycle. Moreover, compared with boiling water, the use of warm water for regeneration will not cause material damage to the carbon filter element, and the use of warm water to extend the life of the carbon filter element is more effective, and the flushing warm water in the present invention is obtained by cooling the boiling water through the heat exchange unit 12, without changing the heating temperature of the system, and the impact on the purification system is minimal, and will not affect the use of users.

[0098] It should be noted that the non-regeneration mode includes the water production mode.

[0099] In some embodiments, the filter unit 2 further includes a fine filter element 22; the connecting pipeline 100 includes:

[0100] The external water inlet pipe 101 is connected to the pre-carbon filter element 21 and is suitable for introducing an external water source into the water purification system;

[0101] The fine filter water inlet pipe 102 is connected between the pre-carbon filter element 21 and the fine filter element 22;

[0102] The pure water pipe 103 is suitable for conveying the purified pure water to the cooking unit 1;

[0103] A boiling water intake pipe 104 is provided between the cooking unit 1 and the boiling water outlet of the water purification system;

[0104] A warm water intake pipe 105 is provided between the cooking unit 1 and the warm water inlet of the water purification system;

[0105] A water storage connecting pipe 106, a first end of which is connected to the water storage unit 7, and a second end of which is connected to the pure water pipe 103;

[0106] The regeneration flushing pipe 107 is connected between the warm water intake pipe 105 and the fine filter water inlet pipe 102;

[0107] The regeneration drainage pipe 108 is arranged in parallel with the external water inlet pipe 101 and is suitable for discharging the regeneration water.

[0108] like Figure 2 and Figure 5As shown, in the non-regeneration mode, the external water inlet pipe 101 introduces the external water source into the water purification system, and after the primary filtration by the pre-carbon filter element 21, the water enters the fine filter element 22 through the fine filter inlet pipe 102 for fine filtration. The finely filtered water enters the heat exchange unit 12 and the heating unit 11 through the pure water pipe 103 for cooking, and then is connected to the boiling water outlet or the warm water outlet through the boiling water intake pipe 104 or the warm water intake pipe 105 to supply water to the user; Figure 3 and Figure 6 As shown, in the regeneration mode, the water in the water storage unit 7 enters the cooking unit 1 through the water storage connecting pipe 106, and the warm water formed after heating and heat exchange enters the pre-carbon filter element 21 through the regeneration flushing pipe 107 for reverse flushing. The adsorption balance of the pre-carbon filter element 21 is broken by the temperature effect, so that the pollutants are desorbed, and the regeneration purpose of the pre-carbon filter element 21 is achieved. In addition, the regeneration flushing pipe 107 is directly led out from the warm water intake pipe 105 of the cooking unit, and there is no need to design a special waterway, which simplifies the pipeline structure of the water purification system.

[0109] Specifically, the external water inlet pipe 101 can be directly connected to tap water, or can be connected to a water storage device.

[0110] In some embodiments, the control valve assembly 3 includes:

[0111] The first valve body 31 is disposed in the external water inlet pipe 101;

[0112] The second valve body 32 is disposed in the fine filter water inlet pipe 102;

[0113] The third valve body 33 is arranged in the pure water pipe 103;

[0114] The fourth valve body 34 is disposed in the regeneration flushing pipe 107;

[0115] A fifth valve body 35 is disposed in the regeneration drain pipe 108;

[0116] In the non-regeneration mode, the fourth valve body 34 and the fifth valve body 35 are in a closed state; in the regeneration mode, the first valve body 31 and the second valve body 32 are in a closed state.

[0117] By providing the first valve body 31, the second valve body 32, the third valve body 33, the fourth valve body 34 and the fifth valve body 35 in the connecting pipeline 100, it is convenient to realize the connection and disconnection of any pipeline among the external water inlet pipe 101, the fine filter water inlet pipe 102, the pure water pipe 103, the regeneration flushing pipe 107 and the regeneration drain pipe 108, thereby changing the water flow path and the water flow direction, and realizing the switching of the water purification system between the non-regeneration mode and the regeneration mode. Without changing the structure of the water purification system, reliable water production can be guaranteed while achieving effective regeneration. The pre-carbon filter element 21 does not need to be replaced, which improves convenience and reduces the cost of replacing the filter element.

[0118] It should be noted that a check valve 4 is also provided in the regeneration flushing pipe 107 to prevent water from flowing back. A temperature regulating valve 6 is also provided at the heat exchange unit 12 to adjust the outlet temperature of the warm water.

[0119] Specifically, the first valve body 31 , the second valve body 32 , the third valve body 33 , the fourth valve body 34 and the fifth valve body 35 are all solenoid valves, which are convenient for automatic control.

[0120] In some embodiments, the filter unit 2 further includes a first post-carbon filter element 23 , and the first post-carbon filter element 23 is disposed in the pure water pipe 103 .

[0121] The first post-carbon filter element 23 arranged in the pure water pipe 103 can purify the water entering the cooking unit 1 from the water storage unit 7 in the regeneration mode, preventing the water stored in the water storage unit 7 for a long time from polluting the water purification system, thereby ensuring the safety of water quality.

[0122] In some embodiments, Figure 4-6 As shown, the filter unit 2 also includes a second post-carbon filter element, which is compositely arranged with the pre-carbon filter element 21; a post-carbon filter water inlet pipe 109 is arranged between the second post-carbon filter element and the fine filter element 22. The PP cotton filter element, the pre-carbon filter element 21, and the second post-carbon filter element can also be composited into one to form a carbon composite filter element 24. Backwashing the carbon composite filter element 24 can achieve effective regeneration of the pre-carbon filter element 21 while also having a certain cleaning effect on the PP cotton filter element in the carbon composite filter element 24.

[0123] The second post-carbon filter element can improve the taste of water after fine filtration and increase user satisfaction; the second post-carbon filter element and the front carbon filter element 21 are combined into a shell, and the water purification system structure is more compact; in the non-regeneration mode, the water filtered by the fine filtration filter element 22 enters the second post-carbon filter element through the post-carbon filter water inlet pipe 109, and then enters the pure water pipe 103 after filtration.

[0124] Specifically, the fine filter element 22 includes an RO membrane filter element. The pre-carbon filter element 21 is used to remove organic matter, some heavy metals, residual chlorine, discoloration and odor in the raw water; the RO membrane filter element can filter all impurity molecules except water molecules; the post-carbon filter element can adjust the taste of water quality.

[0125] In some embodiments, the temperature of the warm water ranges from 35°C to 60°C.

[0126] The temperature range of warm water used to regenerate the carbon filter element is 35℃~60℃. Compared with water at room temperature, the increase in temperature increases the activity of pollutants. The temperature acts as an external force to drive the desorption of pollutants, thereby improving the desorption efficiency. Compared with hot water with a water temperature higher than 60℃, it will not cause material damage to the carbon filter element, and will not affect the extension of the carbon filter element's life due to excessively high water temperature, causing a counter-effect.

[0127] In a second aspect, the present invention further provides a water purification and heat all-in-one machine, including a water purification system.

[0128] Since the integrated water purification and heat machine includes the water purification system of the present invention, it has the same technical effects as the water purification system of the present invention, and will not be described in detail here.

[0129] In a third aspect, the present invention also provides a control method for a water purification system, which is applicable to a water purification system or a water purification and heating integrated machine, such as Figure 7 As shown, the control method includes the following steps:

[0130] Obtain the cumulative clean water volume Q of the pre-carbon filter 21 and the preset regeneration point flow rate Q n Alignment, n is the number of regenerations;

[0131] Determine whether Q=Q n ;

[0132] If Q=Q n , control the water purification system to enter the state of waiting for regeneration;

[0133] When the regeneration conditions are met, the control starts the regeneration mode.

[0134] Preset regeneration point flow rate Q n is the cumulative amount of clean water corresponding to each time the pre-carbon filter element 21 reaches the adsorption saturation state, Q = Q n This indicates that the pre-carbon filter element 21 has reached the adsorption saturation state and needs to be regenerated. At this time, the water purification system can be controlled to enter the waiting for regeneration state to prepare for starting the regeneration mode.

[0135] In some embodiments, Figure 8 As shown, the regeneration mode includes the following control steps:

[0136] The water level h of the water storage unit 7 and the water temperature T of the heating unit 11 are obtained, respectively compared with the preset water level h 满 and preset water temperature T 沸 Compare;

[0137] Determine whether h=h 满 and T = T 沸 ;

[0138] If h=h 满 and T = T沸 , control the regulating control valve assembly 3, and reversely flush the pre-carbon filter element 21 with warm water.

[0139] In the regeneration mode, it is necessary to first determine whether the regeneration conditions are met. The water storage unit 7 must be full of water to ensure a continuous supply of flushing water, and the water in the heating unit 11 must be in a boiling and insulating state to provide regeneration warm water that meets the requirements. Therefore, the regeneration conditions include the water storage unit 7 being full of water, and the water in the heating unit 11 being in a boiling and insulating state. Regeneration can only be started when both the full water and boiling and insulating conditions are met at the same time; the water level of the water storage unit 7 is used as the basis for judging whether the water is full or not, which has high reliability, and the detected water temperature is directly used as the basis for judging whether to enter the boiling and insulating state, which is direct and accurate.

[0140] In some embodiments, Fig. 9 As shown, the regeneration mode includes the following control steps:

[0141] The water level h of the water storage unit 7 and the water temperature T of the heating unit 11 are obtained, respectively compared with the preset water level h 满 and preset water temperature T 沸 Compare;

[0142] Determine whether h=h 满 and T = T 沸 ;

[0143] If yes, the regulating control valve assembly 3 is controlled to reversely flush the pre-carbon filter element 21 with warm water;

[0144] If not, the control valve assembly 3 is controlled to start water replenishment, and / or the heating unit 11 is controlled to start or the heating unit 11 is controlled to continue heating until h=h is satisfied at the same time. 满 and T = T 沸 .

[0145] When different, h=h 满 and T = T 沸 , indicating that the water purification system does not meet the regeneration conditions. If the water is not full, it is necessary to start replenishing water until the water is full. If the temperature does not reach the preset boiling temperature, start heating or continue heating until the water in the heating unit 11 reaches a boiling and heat preservation state.

[0146] In some embodiments, Fig.10 As shown, the control method includes the following steps:

[0147] Obtain the cumulative clean water volume Q of the pre-carbon filter 21 and the preset regeneration point flow rate Q n Alignment, n is the number of regenerations;

[0148] Determine whether Q=Q n ;

[0149] If Q = Q n , control the water purification system to enter the state of waiting for regeneration;

[0150] When the regeneration conditions are met, the control starts the regeneration mode:

[0151] The water level h of the water storage unit 7 and the water temperature T of the heating unit 11 are obtained, respectively compared with the preset water level h 满 and preset water temperature T 沸 Compare;

[0152] Determine whether h=h 满 and T = T 沸 ;

[0153] If h=h 满 and T = T 沸 , control the regulating control valve assembly 3, and reversely flush the pre-carbon filter element 21 with warm water;

[0154] Control closing of control valve assembly 3;

[0155] Obtain the water temperature T1 in the pre-carbon filter element 21 and compare it with the preset target temperature T0;

[0156] Determine whether T1=T0;

[0157] If T1=T0, the control starts the non-regeneration mode;

[0158] If T1=T0 is not satisfied, the control starts normal temperature water replacement or natural cooling until T1=T0 is satisfied.

[0159] After the warm water backwash is completed, the pre-carbon filter 21 is cooled to prevent the high-temperature water in the carbon filter from entering the rear-end non-high-temperature resistant components in the non-regeneration mode, causing component damage and affecting the reliability of the water purification system. If the water in the pre-carbon filter 21 is not cooled to the target value after the warm water backwash is completed, it can be quickly cooled by starting the normal temperature water replacement method, or it can wait for a period of time to allow the water in the carbon filter to naturally cool to the target temperature.

[0160] In some embodiments, Fig.11 As shown, the control method includes the following steps:

[0161] Obtain the cumulative clean water volume Q of the pre-carbon filter 21 and the preset regeneration point flow rate Q n Alignment, n is the number of regenerations;

[0162] Determine whether Q=Q n ;

[0163] If Q = Q n , enter the waiting for regeneration state;

[0164] Get time information t, and idle time t 闲 Or compare the idle time period [t1, t2];

[0165] Determine whether t=t 闲 or t∈[t1,t2];

[0166] If t=t 闲 Or t∈[t1, t2], control starts the regeneration mode:

[0167] The water level h of the water storage unit 7 and the water temperature T of the heating unit 11 are obtained, respectively compared with the preset water level h 满 and preset water temperature T 沸 Compare;

[0168] Determine whether h=h 满 and T = T 沸 ;

[0169] If h=h 满 and T = T 沸 , control the regulating control valve assembly 3, and reversely flush the pre-carbon filter element 21 with warm water;

[0170] Control closing of control valve assembly 3;

[0171] Obtain the water temperature T1 in the pre-carbon filter element 21 and compare it with the preset target temperature T0;

[0172] Determine whether T1=T0;

[0173] If T1=T0, the control starts the non-regeneration mode;

[0174] If T1=T0 is not satisfied, the control starts normal temperature water replacement or natural cooling until T1=T0 is satisfied.

[0175] An idle time point or idle time period is set to indicate that the water purification system is not in water production mode. When in idle time, it can enter the regeneration mode to regenerate the pre-carbon filter 21. The pre-carbon filter 21 is only regenerated in idle time, which will not affect the user's normal water production and water use, thereby improving the user experience.

[0176] In some embodiments, if h=h cannot be satisfied at the same time during the idle time 满 and T = T 沸 , then enter the next idle time period and make another judgment.

[0177] In one embodiment, the water purification system of the heat and water purification machine adopts warm water reverse flushing method for regeneration, using warm water as the medium, and reverse flow flushing to regenerate the pre-carbon filter element 21 in situ. Based on the original water purification system, the warm water regeneration function of the pre-carbon filter element 21 is realized without affecting the original function. The control process is as follows:

[0178] Identify idle time through user settings, default preset time or intelligent learning of user habits, analyze water purification volume, idle time and whole machine status, and automatically enter regeneration when the regeneration entry conditions are met.

[0179] The water purification system mainly includes a filter unit 2, a heat exchange unit 12, a heating unit 11, a water storage unit 7 and a control valve assembly 3. The filter unit 2 mainly includes a pre-treatment filter element, an RO membrane filter element and a post-treatment filter element and a related pumping device 5. The pre-treatment filter element includes a nitrogen pre-carbon filter element 21 or a composite pre-carbon form, and the warm water regeneration object is the pre-carbon filter element 21.

[0180] The water storage unit 7 is generally a pressure barrel, or a water storage device with a self-priming pump. The key to this unit is to have a water discharge driving force, including the pressure of the pressure barrel or a water pump.

[0181] The heating unit 11 is generally a hot tank, a water storage device with a built-in heating element, etc., which can heat the water therein to boiling;

[0182] The heat exchange unit 12 generally includes a heat exchanger, and the heating unit 11 is connected to the heating unit 11 and is provided with two water inlets, namely a boiling water inlet and a warm water inlet, through which boiling water or warm water cooled by the heat exchanger can be taken.

[0183] The specific regeneration process of the pre-carbon filter element 21 is as follows:

[0184] (1) Preparation stage: Before regeneration, the water storage unit 7 must be full of water, and the heating unit 11 has heated the water to a boiling and heat preservation state;

[0185] (2) Warm water regeneration stage: After the water filling and heat preservation conditions are met, the first valve body 31 and the second valve body 32 are closed (the first valve body 31 is used to close the external tap water, and the second valve body 32 is used to prevent warm water from rushing into the rear end parts that are not resistant to high temperatures), and the third valve body 33, the fourth valve body 34 and the fifth valve body 35 are opened. The water in the water storage unit 7 relies on its own driving force to enter the heating unit 11 through the third valve body 33 and the heat exchange unit 12. The boiling water in the heating unit 11 is cooled by the heat exchange unit 12 to become warm water, and then enters the pre-carbon filter element 21 in the reverse direction through the fourth valve body 34, and is reversely flushed and regenerated. Finally, the regenerated waste water is discharged by the fifth valve body 35.

[0186] (3) Filter element cooling stage: After the pre-carbon filter element 21 completes warm water regeneration, the water temperature in the filter element is relatively high. In order to protect the rear-end components that are not resistant to high temperatures, after the warm water regeneration stage is completed, all valves in the system are closed, and the warm water in the pre-carbon filter element 21 is naturally cooled to meet the rear-end temperature resistance limit.

[0187] The water purification system uses warm water as a medium to regenerate the pre-carbon filter 21, restore its adsorption capacity, and through the reverse flushing force, can clean the composite filter components such as PP cotton to a certain extent, extending the filter replacement cycle; the water purification system can realize the in-situ regeneration of the pre-carbon filter 21 without disassembly, and is only controlled by valve components without human intervention.

[0188] A control method for intelligently identifying and automatically regenerating the pre-carbon filter 21 according to an embodiment of the present invention includes:

[0189] Step 1, idle time setting: Since the water purification system cannot start water production when the pre-carbon filter element 21 is in situ for thermal regeneration, in order to optimize the user experience, the user can set the idle time, or the intelligent system can automatically collect and learn the idle time. The idle time can be set to the t1-t2 time period (such as 24:00-5:00);

[0190] Step 2: Calculate the cumulative net water volume Q of the pre-carbon filter 21: The net water volume of the pre-carbon filter 21 is calculated by monitoring the running time of the pumping device 5 or a flow meter, etc., to identify whether the preset regeneration point has been reached. When it reaches the designed regeneration point (Q = Q n ), the filter element enters the waiting state for regeneration, where n is the number of regenerations, and the number of regenerations is automatically increased by 1 after each regeneration, and multiple regenerations are performed within the life of the filter element; Q2=2*Q1,

[0191] Q3=3*Q1,……,Q n =n*Q1; In one embodiment, Q1 ranges from 200L to 3000L;

[0192] Step 3: Preparation stage: After reaching the preset idle time, the whole machine is identified to be in insulation and full of water. If not, the whole machine is heated and replenished with water until it is met and enters step 4. If the preparation stage conditions are not met continuously and the preset time period has been exceeded, the next idle time is identified.

[0193] Step 4: Regeneration stage: After completing step 3, the pre-carbon filter element 21 starts warm water regeneration and filter element cooling, and after completion, continues to calculate the cumulative clean water volume of the pre-carbon filter element 21 (ie, step 2).

[0194] Step 4 includes more specific sub-steps:

[0195] Sub-step 1, warm water regeneration: use hot water to flush and regenerate the pre-carbon filter element 21 to restore its adsorption performance and extend its life;

[0196] Sub-step 2, filter element cooling: cool the filter element by natural cooling or replacement with normal temperature water to prevent the higher temperature warm water in the front carbon filter element 21 from flowing into the rear end parts that are not resistant to high temperatures during normal water production.

[0197] The present invention identifies idle time through user settings, default preset time or intelligent learning of user habits, analyzes cumulative water purification volume, idle time, whole machine status and other regeneration entry conditions, and automatically enters regeneration when they are met, thereby improving user experience.

[0198] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A water purification system, characterized in that: Having a non-regeneration mode and a regeneration mode, the water purification system comprises: Connecting pipeline (100); The cooking unit (1) comprises a heating unit (11) and a heat exchange unit (12), wherein the heating unit (11) is suitable for heating water to boil to obtain boiling water; the heat exchange unit (12) is connected to the heating unit (11) and is suitable for cooling the boiling water to obtain warm water; A filter unit (2), the filter unit (2) comprising a pre-carbon filter element (21), wherein in the non-regeneration mode, the pre-carbon filter element (21) is located upstream of the cooking unit (1) in the direction of water flow; in the regeneration mode, the pre-carbon filter element (21) is located downstream of the cooking unit (1) in the direction of water flow, so that the warm water reversely flushes to regenerate the pre-carbon filter element (21); A control valve assembly (3) is arranged in the connecting pipeline (100), and the control valve assembly (3) is suitable for controlling the water purification system to switch between the non-regeneration mode and the regeneration mode.

2. The water purification system according to claim 1, characterized in that: The filter unit (2) further comprises a fine filter element (22); the connecting pipeline (100) comprises: An external water inlet pipe (101) connected to the pre-carbon filter element (21) and suitable for introducing an external water source into the water purification system; A fine filter water inlet pipe (102), which is arranged in communication between the pre-carbon filter element (21) and the fine filter element (22); A pure water pipe (103), adapted to transport purified pure water to the cooking unit (1); A boiling water intake pipe (104) is arranged to communicate between the cooking unit (1) and the boiling water outlet of the water purification system; A warm water intake pipe (105) is arranged to communicate between the cooking unit (1) and the warm water inlet of the water purification system; A water storage connecting pipe (106), wherein a first end of the water storage connecting pipe (106) is connected to a water storage unit (7), and a second end of the water storage connecting pipe (106) is connected to the pure water pipe (103); A regeneration flushing pipe (107) is arranged in communication between the warm water intake pipe (105) and the fine filter water inlet pipe (102); The regeneration drainage pipe (108) is arranged in parallel with the external water inlet pipe (101) and is suitable for discharging the regenerated water.

3. The water purification system according to claim 2, characterized in that: The control valve assembly (3) comprises: A first valve body (31) is arranged in the external water inlet pipe (101); A second valve body (32) is arranged in the fine filter water inlet pipe (102); A third valve body (33) is arranged in the pure water pipe (103); a fourth valve body (34) disposed in the regeneration flushing pipe (107); a fifth valve body (35), arranged in the regeneration drain pipe (108); In the non-regeneration mode, the fourth valve body (34) and the fifth valve body (35) are in a closed state; in the regeneration mode, the first valve body (31) and the second valve body (32) are in a closed state.

4. The water purification system according to claim 2, characterized in that: The filter unit (2) further comprises a first post-carbon filter element (23), wherein the first post-carbon filter element (23) is arranged in the pure water pipe (103).

5. The water purification system according to claim 2 or 4, characterized in that: The filter unit (2) further comprises a second post-carbon filter element, which is compositely arranged with the pre-carbon filter element (21); a post-carbon filter water inlet pipe (109) is arranged between the second post-carbon filter element and the fine filter element (22).

6. The water purification system according to any one of claims 1 to 5, characterized in that: The temperature of the warm water ranges from 35°C to 60°C.

7. A heat and air conditioning machine, characterized in that: A water purification system comprising any one of claims 1-6.

8. A method for controlling a water purification system, characterized in that: Applicable to the water purification system described in any one of claims 1 to 6 or the water purification and heating integrated machine described in claim 7, the control method comprises the following steps: Get the cumulative clean water volume Q of the pre-carbon filter and the preset regeneration point flow Q n Alignment, n is the number of regenerations; Determine whether Q=Q n ; If Q = Q n , control the water purification system to enter the state of waiting for regeneration; When the regeneration conditions are met, the control starts the regeneration mode.

9. The control method of the water purification system according to claim 8, characterized in that: The regeneration mode includes the following control steps: Get the water level h of the water storage unit and the water temperature T of the heating unit, respectively, and compare them with the preset water level h 满 and preset water temperature T 沸 Compare; Determine whether h=h 满 and T = T 沸 ; If h=h 满 and T = T 沸 , control the regulating control valve assembly, and reversely flush the pre-carbon filter element with warm water.

10. The control method of the water purification system according to claim 9, characterized in that: If h=h is not satisfied at the same time 满 and T = T 沸 , then the regulating control valve assembly is controlled to start water replenishment, and / or the heating unit is controlled to start or the heating unit continues heating until both h=h 满 and T = T 沸 .

11. The control method of a water purification system according to any one of claims 8 to 10, characterized in that: After the warm water reversely flushes the pre-carbon filter element, the pre-carbon filter element cooling step is also included: Control closing of control valve assembly; Obtain the water temperature T1 in the pre-carbon filter element and compare it with the preset target temperature T0; Determine whether T1=T0; If T1=T0 is satisfied, the control enters the non-regeneration mode.

12. The control method of the water purification system according to claim 11, characterized in that: If T1=T0 is not satisfied, the control starts normal temperature water replacement or natural cooling until T1=T0 is satisfied.

13. The control method of a water purification system according to any one of claims 8 to 12, characterized in that: The regeneration conditions are complete and include: Get time information t, and idle time t 闲 Or compare the idle time period [t1, t2]; Determine whether t=t 闲 or t∈[t1,t2]; If t=t 闲 Or t∈[t1, t2], control starts the regeneration mode.

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