Scale removal module, water purification system, control method and water purifier

Abstract

The invention provides a scale removal module, a water purification system, a control method and a water purifier, the scale removal module is used for carrying out scale removal treatment on an RO membrane filter, the RO membrane filter is provided with a flow inlet, and the RO membrane filter introduces water through the flow inlet for filtration; the incrustation removing module is provided with a flow inlet a, a heating module, a cooling module and a flow outlet a; wherein the incrustation removing module is used for introducing water through the flow inlet a; the heating module is used for heating water at the flow inlet a, so that the water is evaporated to obtain high-temperature water vapor; the cooling module is used for cooling the high-temperature water vapor into low-temperature water vapor; and the scale removal module is used for introducing the low-temperature water vapor into a flow inlet of the RO membrane filter through a flow outlet a. According to the technical scheme provided by the invention, the filtering effect and long-acting operation of the RO membrane filter element can be effectively guaranteed, the service life of the RO membrane filter element is guaranteed, and discharged water is pollution-free and good in taste.

Description

Technical Field

[0001] The present invention belongs to the technical field of water purification, and in particular relates to a scale removal module, a water purification system, a control method and a water purifier. Background Art

[0002] In daily use, reverse osmosis water purifiers have large differences in water quality in various regions, especially in areas with serious water pollution, such as high TDS hardness, alkalinity, and organic matter in the water supply, which can easily cause scale to form in the RO membrane filter element in the RO membrane filter. If there is too much scale, it is easy to cause the RO membrane filter element to become blocked and fail, resulting in high after-sales failure rate and maintenance costs. The natural osmotic concentration of the RO membrane filter element has always been the focus of research and development of major manufacturers. The existing related technology discloses a technical solution for flushing the RO membrane filter element with warm water. Since the water molecular weight of warm water is large, its diffusion and permeability are low, resulting in the filtering effect of warm water on the RO membrane filter element is still not ideal, which needs to be improved. Summary of the invention

[0003] Therefore, the present invention provides a scale removal module, a water purification system, a control method and a water purifier, and the main technical problem to be solved is: how to improve the scale removal effect of the RO membrane filter element.

[0004] In order to solve the above problems, the present invention provides a scale removal module for performing scale removal treatment on an RO membrane filter, wherein the RO membrane filter has an inlet, and the RO membrane filter introduces water through the inlet for filtering; the scale removal module has an inlet, a heating module, a cooling module and an outlet;

[0005] Wherein, the scale removal module is used to introduce water through the a inlet;

[0006] The heating module is used to heat the water at the inlet a to evaporate the water and obtain high-temperature water vapor;

[0007] The cooling module is used to cool the high-temperature water vapor into low-temperature water vapor;

[0008] The scale removal module is used to introduce the low-temperature water vapor into the inlet of the RO membrane filter through the outlet a.

[0009] In some embodiments, the heating module includes a heating chamber, which has an inlet b and a steam outlet. The heating module receives water from the inlet a through the inlet b to introduce the water from the inlet a into the heating chamber for heating so that it evaporates and obtains the high-temperature water vapor; the heating module also discharges the high-temperature water vapor through the steam outlet.

[0010] In some embodiments, the b inlet is arranged at the bottom of the heating chamber, and the steam outlet is arranged at the top of the heating chamber.

[0011] In some embodiments, the cooling module includes a heat exchanger, which has a first heat exchange channel and a second heat exchange channel that can exchange heat with each other; one end of the first heat exchange channel is connected to the a inlet, and the other end is connected to the b inlet, so that the b inlet receives water from the a inlet through the first heat exchange channel; one end of the second heat exchange channel is connected to the steam outlet to introduce the high-temperature water vapor into the interior for cooling, and the other end of the second heat exchange channel is connected to the a outlet to guide the low-temperature water vapor obtained after cooling to the a outlet.

[0012] In some embodiments, the scale removal module also includes a first pump body, which is arranged on a pipeline between one end of the second heat exchange channel and the steam outlet, and the first pump body is used to pump high-temperature water vapor from the steam outlet to one end of the second heat exchange channel.

[0013] In some embodiments, the scale removal module further comprises a first switch valve, and the first switch valve is used to control the on-off of the flow path of the scale removal module itself;

[0014] And / or, the scale removal module further comprises a regulating valve, and the regulating valve is used to control the flow rate of the flow path of the scale removal module itself;

[0015] And / or, the scale removal module further includes a check valve arranged on the inlet pipeline of the inlet port a.

[0016] The present invention also provides a water purification system, which comprises any one of the scale removal modules described above.

[0017] In some embodiments, the RO membrane filter has an outlet, and the RO membrane filter discharges water filtered by the internal RO membrane filter element through the outlet;

[0018] Wherein, the inlet a is communicated with the outlet so that the inlet a introduces water from the outlet.

[0019] In some embodiments, the inlet of the RO membrane filter is connected to a water inlet pipeline, and a second switch valve and a second pump body are provided on the water inlet pipeline. The scale removal module is connected to the pipeline section between the second switch valve and the second pump body of the water inlet pipeline through the a outlet, so that the a outlet can introduce the low-temperature water vapor into the inlet of the RO membrane filter through the water inlet pipeline.

[0020] The present invention also provides a control method for the above-mentioned water purification system. When the scale removal module further includes a first switch valve and a regulating valve, the water purification system has a scale removal mode. In the scale removal mode, the second switch valve is closed, the first switch valve and the regulating valve are both opened, and the second pump body and the scale removal module are both started; wherein,

[0021] When the water inlet pressure of the inlet is higher than a first preset value, the water purification system is controlled to enter the scale removal mode, so that the water purification system continues to operate in the scale removal mode until the water inlet pressure of the inlet drops below a second preset value, and then the water purification system is controlled to exit the scale removal mode;

[0022] And / or, when the TDS at the outlet of the RO membrane filter is higher than a third preset value, the water purification system is controlled to enter the scale removal mode, so that the water purification system continues to run in the scale removal mode for a first preset time and then detects the TDS at the outlet again; if the TDS at the outlet drops below a fourth preset value, the water purification system is controlled to exit the scale removal mode, otherwise step S0 is executed; step S0 is: the water purification system continues to run in the scale removal mode for a second preset time and then detects the TDS at the outlet again; if the TDS at the outlet drops below the fourth preset value, the water purification system is controlled to exit the scale removal mode, otherwise step S0 is executed again.

[0023] In some embodiments, after the water purification system exits the scale removal mode, the wastewater outlet of the RO membrane filter is opened for a preset time and then closed.

[0024] The present invention also provides a water purifier, which includes any of the scale removal modules described above, or includes any of the water purification systems described above.

[0025] The present invention provides a scale removal module, a water purification system, a control method and a water purifier having the following features:

[0026] Beneficial effects:

[0027] Compared with the technical solution of using warm water to rinse the RO membrane filter element in the prior art, the molecular weight of the water vapor in the present invention is smaller, and its diffusion and permeability are higher, so that the ability to remove the pollution source intercepted by the RO membrane filter element is stronger, and the flushing surface is cleaner and more thorough, which can effectively ensure the filtering effect and long-term operation of the RO membrane filter element, ensure the service life of the RO membrane filter element and the pollution-free water quality and good taste. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0029] Figure 1 It is a structural diagram of a water purification system provided by one embodiment of the present invention.

[0030] The accompanying drawings are marked as follows:

[0031] 1. Second switch valve; 2. First switch valve; 3. Second TDS probe; 4. First TDS probe; 5. Heating module; 6. First temperature sensing package; 7. Second temperature sensing package; 8. Third temperature sensing package; 9. Second pump body; 10. Cooling module; 11. Pressure sensor; 12. Wastewater solenoid valve; 13. RO membrane filter; 14. First pump body; 15. Regulating valve; 16. PCC composite filter; 17. Flow meter; 18. Check valve; 100. a inlet; 20 0, a outlet; 300, water inlet; 400, water outlet; 500, inlet; 101, first heat exchange channel; 101a, one end of the first heat exchange channel; 101b, the other end of the first heat exchange channel; 102, second heat exchange channel; 102a, one end of the second heat exchange channel; 102b, the other end of the second heat exchange channel; 131, inlet; 132, outlet; 133, wastewater outlet; 501, steam outlet; 502, b inlet. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0034] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0035] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0036] See also Figure 1 As shown, according to an embodiment of the present invention, a scale removal module is provided for performing scale removal treatment on an RO membrane filter 13. The RO membrane filter 13 has an inlet 131, and the RO membrane filter 13 introduces water for filtration through the inlet 131. The specific structure of the RO membrane filter 13 is prior art and will not be described in detail herein.

[0037] The aforementioned scale removal module has an a inlet 100, a heating module 5, a cooling module 10 and an a outlet 200. The scale removal module is used to introduce water through the a inlet 100. The heating module 5 is used to heat the water in the a inlet 100 to evaporate it to obtain high-temperature water vapor. The cooling module 10 is used to cool the high-temperature water vapor into low-temperature water vapor. The scale removal module is used to introduce the low-temperature water vapor into the inlet 131 of the RO membrane filter through the a outlet 200.

[0038] In the above example, high temperature water vapor and low temperature water vapor are relative. The temperature of the high temperature water vapor obtained by heating and evaporation by the heating module 5 is generally 100° C. The temperature of the low temperature water vapor can be 40-45° C. In some occasions, the low temperature water vapor can also be called medium temperature water vapor.

[0039] After the aforementioned low-temperature water vapor is introduced into the inlet 131 of the RO membrane filter, it enters the RO membrane filter 13 and can rinse the RO membrane filter element in the RO membrane filter 13. Compared with the technical solution of using warm water to rinse the RO membrane filter element in the prior art, the molecular weight of the water vapor in the present invention is smaller, and its diffusion and permeability are higher, so that the ability to remove the pollution source intercepted by the RO membrane filter element is stronger, and the surface of the rinse is cleaner and more thorough, which can effectively ensure the filtering effect and long-term operation of the RO membrane filter element, and ensure the service life of the RO membrane filter element and the pollution-free and good taste of the water coming out.

[0040] The aforementioned heating module may be an instant heating module, and the specific structure of the instant heating module is prior art and will not be described in detail here. Figure 1 As shown, the aforementioned heating module 5 may include a heating chamber, and the heating chamber has a b inlet 502 and a steam outlet 501. The heating module 5 receives the water from the a inlet 100 through the b inlet 502, so as to introduce the water from the a inlet 100 into the interior of the heating chamber for heating, so that it evaporates to obtain the aforementioned high-temperature water vapor. The heating module 5 also discharges the high-temperature water vapor through the steam outlet 501. In a specific application example, the aforementioned b inlet 502 can be set at the bottom of the heating chamber, and the steam outlet 501 can be set at the top of the heating chamber. Among them, the specific structure of the heating chamber is the prior art and will not be repeated here.

[0041] In order to realize the functions of the aforementioned cooling module 10, in some embodiments, as Figure 1 As shown, the aforementioned cooling module 10 may include a heat exchanger, and the heat exchanger has a first heat exchange channel 101 and a second heat exchange channel 102 that can exchange heat with each other. One end 101a of the first heat exchange channel is connected to the aforementioned a inlet 100, and the other end 101b is connected to the b inlet 502, so that the b inlet 502 receives water from the a inlet 100 through the first heat exchange channel 101. One end 102a of the second heat exchange channel is connected to the steam outlet 501 to introduce high-temperature water vapor into the interior for cooling. The other end 102b of the second heat exchange channel is connected to the a outlet 200 to guide the low-temperature water vapor obtained after cooling to the a outlet 200.

[0042] In the above example, when the high-temperature water vapor flows through the second heat exchange channel 102, it can exchange heat with the cold water in the first heat exchange channel 101, thereby achieving the effect of cooling the high-temperature water vapor. In addition, the heat exchanger also has the effect of equalizing the temperature, making the temperature of the water vapor more uniform after heat exchange, which is beneficial to improve the flushing effect of the RO membrane filter element.

[0043] In some embodiments, Figure 1 As shown, the scale removal module may further include a first pump body 14, which is disposed on the pipeline between one end 102a of the second heat exchange channel and the steam outlet 501. The first pump body 14 is used to pump high-temperature water vapor from the steam outlet 501 to one end 102a of the second heat exchange channel.

[0044] In the above example, the first pump body 14 can accelerate the flow of high-temperature water vapor, increase the amount of water vapor, and thus improve the flushing effect on the RO membrane filter element.

[0045] In some implementations, the first pump body 14 may be a vacuum water pump or the like.

[0046] In some embodiments, Figure 1 As shown, the aforementioned scale removal module further includes a first switch valve 2, which is used to control the on-off of the flow path of the scale removal module itself. The first switch valve 2 can be arranged on the inlet pipeline 500 of the inlet a.

[0047] In some embodiments, Figure 1 As shown, the aforementioned scale removal module may further include a regulating valve 15, which is used to control the flow rate of the flow path of the scale removal module itself. The regulating valve 15 may be arranged on the inlet pipeline 500 of the inlet port a.

[0048] In some embodiments, Figure 1 As shown, the aforementioned scale removal module may further include a check valve 18 disposed on the inlet pipeline 500 of the inlet port a to prevent the water entering the scale removal module from flowing back.

[0049] It should be noted here that: in some embodiments, the pipeline between the one end 101a of the aforementioned first heat exchange channel and the a inlet 100 is the inlet pipeline 500 of the a inlet.

[0050] In some embodiments, Figure 1As shown, the present invention also provides a water purification system, which includes any of the above-mentioned scale removal modules. Among them, because the water purification system adopts the above-mentioned scale removal module, compared with the technical solution of using warm water to rinse the RO membrane filter element in the prior art, the molecular weight of water vapor in the present invention is smaller, and its diffusion and permeability are higher, so that the ability to remove the pollution source intercepted by the RO membrane filter element is stronger, and the surface of the rinse is cleaner and more thorough, which can effectively ensure the filtering effect and long-term operation of the RO membrane filter element, and ensure the service life of the RO membrane filter element and the pollution-free and good taste of the water coming out.

[0051] In some embodiments, Figure 1 As shown, the aforementioned RO membrane filter 13 has an outlet 132. The RO membrane filter 13 discharges water filtered by the internal RO membrane filter element through the outlet 132. The inlet a 100 is connected to the outlet 132, so that the inlet a 100 introduces water from the outlet 132.

[0052] In the above example, the water filtered through the RO membrane filter element is pure water with better water quality and less impurities. The water vapor obtained by evaporation is used to flush the RO membrane filter element, which has a better purification effect.

[0053] In some embodiments, Figure 1 As shown, the inlet 131 of the RO membrane filter is connected to the water inlet pipeline 300, and the water inlet pipeline 300 is provided with a second switch valve 1 and a second pump body 9. The scale removal module is connected to the pipeline section between the second switch valve 1 and the second pump body 9 of the water inlet pipeline 300 through an outlet a 200, so that the outlet a 200 can introduce low-temperature water vapor into the inlet 131 of the RO membrane filter through the water inlet pipeline 300, thereby realizing flushing of the RO membrane filter 13.

[0054] In some embodiments, the aforementioned second pump body 9 may be a pressure-stabilizing pump or the like.

[0055] In some embodiments, Figure 1 As shown, the outlet 132 of the aforementioned RO membrane filter is connected to a water outlet pipeline 400, and the inlet a 100 of the aforementioned scale removal module can be connected to the water outlet pipeline 400 to communicate with the outlet 132 of the RO membrane filter through the water outlet pipeline 400.

[0056] In some embodiments, the first switch valve 2 and the second switch valve 1 can both be solenoid valves, etc. The regulating valve 15 can be an electric valve with adjustable opening, etc.

[0057] like Figure 1As shown, the aforementioned water purification system may further include a first temperature sensing package 6, a second temperature sensing package 7 and a third temperature sensing package 8. The first temperature sensing package 6 is used to detect the temperature of the high-temperature water vapor heated by the heating module 5, the second temperature sensing package 7 is used to detect the temperature of the low-temperature water vapor cooled by the cooling module 10, and the third temperature sensing package 8 is used to detect the temperature at the inlet 131 of the RO membrane filter.

[0058] like Figure 1 As shown, the aforementioned water purification system also includes a raw water inlet, a first TDS probe 4, a flow meter 17, and a PCC composite filter 16, wherein the PCC composite filter 16 has a PCC composite filter element. The first TDS probe 4 is arranged on the upstream pipeline of the second switch valve 1. The flow meter 17 is arranged on the water inlet pipeline 300, and is located on the pipeline section between the second switch valve 1 and the a outlet 200.

[0059] In some embodiments, the present invention also provides a control method for the above-mentioned water purification system. When the scale removal module further includes the first switch valve 2 and the regulating valve 15, the water purification system has a scale removal mode. In the scale removal mode, the second switch valve 1 is closed, the first switch valve 2 and the regulating valve 15 are both opened, and the second pump body 9 and the scale removal module are started. In this scale removal mode, the second switch valve 1 is closed and the first switch valve 2 is opened, so that the flow path of the scale removal module, the second pump body 9 and the RO membrane filter 13 can form a circulation flow path. At this time, the scale removal module and the second pump body 9 can be turned on to circulate and flush the RO membrane filter element.

[0060] Among them, when the scale removal module is started, the heating module 5 is turned on. When the scale removal module is turned off, the heating module 5 is turned off. When the scale removal module also has a first pump body 14, when the scale removal module is started, the first pump body 14 is turned on; when the scale removal module is turned off, the first pump body 14 is turned off. In this scale removal mode, the steam temperature detected by the first temperature sensing package 6 is 95-100°C. The steam temperature detected by the second temperature sensing package 7 is generally 45-50°C. The steam temperature detected by the third temperature sensing package 8 is generally 40-45°C.

[0061] In some embodiments, when the water inlet pressure of the inlet 131 is higher than a first preset value, the water purification system is controlled to enter a scale removal mode, and the water purification system continues to operate in the scale removal mode until the water inlet pressure of the inlet 131 drops below a second preset value, and then the water purification system is controlled to exit the scale removal mode.

[0062] In the above example, when the water inlet pressure of the inlet 131 is higher than the first preset value, it means that there is a lot of scale on the RO membrane filter element and needs to be cleaned. At this time, the water purification system is controlled to enter the scale removal mode and the RO membrane filter element can be circulated and flushed.

[0063] It should be noted that: in a specific application example, the first preset value may be 8 kg. The pressure sensor 11 may be used to detect the water inlet pressure of the inlet 131. The second preset value may be 6 kg.

[0064] In some embodiments, when the TDS of the outlet 132 of the RO membrane filter is higher than the third preset value, the water purification system is controlled to enter the scale removal mode, and the water purification system is allowed to continue to operate in the scale removal mode for a first preset time, and then the TDS of the outlet 132 is detected again. If the TDS of the outlet 132 drops below the fourth preset value, the water purification system is controlled to exit the scale removal mode, otherwise, step S0 is executed. Step S0 is: the water purification system is allowed to continue to operate in the scale removal mode for a second preset time, and then the TDS of the outlet 132 is detected again. If the TDS of the outlet 132 drops below the fourth preset value, the water purification system is controlled to exit the scale removal mode, otherwise, step S0 is executed again.

[0065] In the above example, when the TDS of the outlet 132 of the RO membrane filter is higher than the third preset value, it means that the water quality in the water purification system is poor and the RO membrane filter element needs to be cleaned. At this time, the water purification system is controlled to enter the scale removal mode and the RO membrane filter element can be circulated and flushed.

[0066] It should be noted that TDS is the abbreviation of total dissolved solids in water. If the TDS value is large, the salt content in the water is high. On the contrary, if the TDS value is small, the water purity is good. The second TDS probe 3 can be used to detect the TDS value of the outlet 132 of the RO membrane filter. The third preset value can be 100ppm, and the fourth preset value can be 50ppm. The first preset time can be 1 minute, and the second preset time can be 30 seconds.

[0067] In some embodiments, after the aforementioned water purification system exits the scale removal mode, the wastewater outlet 133 of the RO membrane filter 13 is opened for a preset time and then closed, so that the scale in the RO membrane filter 13 can be discharged.

[0068] It should be noted here that: the wastewater solenoid valve 12 can be used to control the opening and closing of the wastewater outlet 133.

[0069] In some embodiments, the present invention further provides a water purifier, which may include any of the scale removal modules described above, or include any of the water purification systems described above.

[0070] In the above example, since the water purifier adopts the above-mentioned scale removal module or water purification system, compared with the technical solution of using warm water to rinse the RO membrane filter element in the prior art, the molecular weight of water vapor in the present invention is smaller, and its diffusion and permeability are higher, so that the ability to remove the pollution source intercepted by the RO membrane filter element is stronger, and the flushing surface is cleaner and more thorough, which can effectively ensure the filtering effect and long-term operation of the RO membrane filter element, ensure the service life of the RO membrane filter element and the pollution-free and good-tasting water quality.

[0071] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A scale removal module, used for performing scale removal treatment on an RO membrane filter (13), wherein the RO membrane filter (13) has an inlet (131), and the RO membrane filter (13) introduces water through the inlet (131) for filtration; characterized in that: The scale removal module comprises an inlet (100), a heating module (5), a cooling module (10) and an outlet (200); Wherein, the scale removal module is used to introduce water through the a inlet (100); The heating module (5) is used to heat the water at the a inlet (100) to evaporate the water and obtain high-temperature water vapor; The cooling module (10) is used to cool the high-temperature water vapor into low-temperature water vapor; The scale removal module is used to introduce the low-temperature water vapor into the inlet (131) of the RO membrane filter through the a outlet (200).

2. The scale removal module according to claim 1, characterized in that: The heating module (5) comprises a heating chamber, the heating chamber having a b inlet (502) and a steam outlet (501), the heating module (5) receiving water from the a inlet (100) through the b inlet (502) to introduce the water from the a inlet (100) into the interior of the heating chamber for heating, causing it to evaporate and obtain the high-temperature water vapor; the heating module (5) also discharges the high-temperature water vapor through the steam outlet (501).

3. The scale removal module according to claim 2, characterized in that: The b inlet (502) is arranged at the bottom of the heating chamber, and the steam outlet (501) is arranged at the top of the heating chamber.

4. The scale removal module according to claim 2 or 3, characterized in that: The cooling module (10) comprises a heat exchanger, wherein the heat exchanger has a first heat exchange channel (101) and a second heat exchange channel (102) which can exchange heat with each other; one end (101a) of the first heat exchange channel is connected to the a inlet (100), and the other end (101b) of the first heat exchange channel is connected to the b inlet (502), so that the b inlet (502) receives water from the a inlet (100) through the first heat exchange channel (101); one end (102a) of the second heat exchange channel is connected to the steam outlet (501) so as to introduce the high-temperature water vapor into the interior for cooling, and the other end (102b) of the second heat exchange channel is connected to the a outlet (200) so as to guide the low-temperature water vapor obtained after cooling to the a outlet (200).

5. The scale removal module according to claim 4, characterized in that: It also includes a first pump body (14), which is arranged on a pipeline between one end (102a) of the second heat exchange channel and the steam outlet (501), and the first pump body (14) is used to pump high-temperature water vapor from the steam outlet (501) to one end (102a) of the second heat exchange channel.

6. The scale removal module according to any one of claims 1-3 and 5, characterized in that: The scale removal module further comprises a first switch valve (2), wherein the first switch valve (2) is used to control the on-off of the flow path of the scale removal module itself; And / or, the scale removal module further comprises a regulating valve (15), wherein the regulating valve (15) is used to control the flow rate of the flow path of the scale removal module itself; And / or, the scale removal module further comprises a check valve (18) arranged on the inlet pipeline (500) of the a inlet port (100).

7. A water purification system, characterized in that: The invention comprises the scale removal module according to any one of claims 1 to 6.

8. The water purification system according to claim 7, characterized in that: The RO membrane filter has an outlet (132), and the RO membrane filter discharges water filtered by the internal RO membrane filter element through the outlet (132); The a-inlet (100) is connected to the outlet (132) so that the a-inlet (100) can introduce water from the outlet (132).

9. The water purification system according to claim 8, characterized in that: The inlet (131) of the RO membrane filter is connected to a water inlet pipeline (300), and the water inlet pipeline (300) is provided with a second switch valve (1) and a second pump body (9). The scale removal module is connected to the pipeline section between the second switch valve (1) and the second pump body (9) of the water inlet pipeline (300) through the a outlet (200), so that the a outlet (200) can introduce the low-temperature water vapor into the inlet (131) of the RO membrane filter through the water inlet pipeline (300).

10. A control method for a water purification system according to claim 9, wherein when the scale removal module further comprises a first switch valve (2) and a regulating valve (15), the method is characterized in that: The water purification system has a scale removal mode. In the scale removal mode, the second switch valve (1) is closed, the first switch valve (2) and the regulating valve (15) are both opened, and the second pump body (9) and the scale removal module are both started; wherein: When the water inlet pressure of the inlet (131) is higher than a first preset value, the water purification system is controlled to enter the scale removal mode, so that the water purification system continues to operate in the scale removal mode until the water inlet pressure of the inlet (131) drops below a second preset value, and then the water purification system is controlled to exit the scale removal mode; And / or, when the TDS at the outlet (132) of the RO membrane filter is higher than a third preset value, the water purification system is controlled to enter the scale removal mode, so that the water purification system continues to operate in the scale removal mode for a first preset time and then detects the TDS at the outlet (132) again; if the TDS at the outlet (132) drops below a fourth preset value, the water purification system is controlled to exit the scale removal mode, otherwise, step S0 is executed; step S0 is: the water purification system continues to operate in the scale removal mode for a second preset time and then detects the TDS at the outlet (132) again; if the TDS at the outlet (132) drops below the fourth preset value, the water purification system is controlled to exit the scale removal mode, otherwise, step S0 is executed again.

11. The control method according to claim 10, characterized in that: After the water purification system exits the scale removal mode, the wastewater outlet (133) of the RO membrane filter is opened for a preset time and then closed.

12. A water purifier, characterized in that: A scale removal module comprising any one of claims 1-6, or a water purification system comprising any one of claims 7-9.

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