CN219546769U - Sterilizing and scale-reducing device for water heater - Google Patents

Abstract

The utility model provides a sterilizing and scale-reducing device of a water heater, and belongs to the field of sterilization. The sterilizing and scale-reducing device of the water heater comprises the water heater and the shower head, wherein a sterilizing box is arranged between the water heater and the shower head, and the interior of the sterilizing box is fixedly divided into a first electrolytic cavity, a second electrolytic cavity and a filtering cavity, wherein the first electrolytic cavity, the second electrolytic cavity and the filtering cavity are respectively arranged on the upper part and the bottom of the filtering cavity. The sterilizing and scale-reducing device of the water heater utilizes electrolysis and filter materials to remove scale, microorganisms and other impurities in water to the maximum extent, thereby ensuring the water purifying effect; meanwhile, the sterilizing and descaling device can work simultaneously with the water heater to perform real-time treatment, so that instant and efficient water purification and descaling are realized; the water heater is not required to be modified, the water heater is externally arranged and is suitable for all water heaters on the market, and the adaptability is wide; an independent filter cavity is additionally arranged, oxygen, water hydroxyl or other corrosive substances generated by the electrolyzed water are removed through filtration, the corrosive side effect of the electrolyzed water product after entering the water heater is reduced, and the safety of the inner container of the water heater is ensured.

Description

Sterilizing and scale-reducing device for water heater

Technical Field

The utility model relates to a sterilization device, in particular to a sterilization and scale reduction device of a water heater, and belongs to the technical field of sterilization.

Background

The electric water heater is a water heater which uses electricity as energy source to heat. Is one of three water heaters which are parallel to the gas water heater and the solar water heater.

For families without full house water purification, the electric water heater is easy to form a large amount of scale, the scale is increased to easily cause the breeding of microorganisms such as bacteria and viruses, the inner container can be corroded after long-term use, the scale covers the heating pipe, and the damage such as inflammation and the like of the body after water consumption is caused by blocking the water pipe and the shower head. Considering that a typical domestic water heater heats to 50-70 ℃, this temperature often does not completely kill bacteria or spores. In particular, electric water heaters often store water for a long time, repeatedly heat, and the hidden trouble of scaling and bacteria breeding is more serious. Therefore, it is particularly important to design a device capable of assisting sterilization and scale reduction.

Currently, commercial products generally incorporate magnesium rods to reduce liner corrosion for scale. However, the magnesium rod is a consumable material, needs to be replaced regularly, and a large amount of settled scale still exists in actual use, so that the magnesium rod needs to be cleaned regularly, and the integral descaling effect is incomplete. Current patent application number: 202121135621.2 the utility model discloses an electric water heater with a cleaning function, which comprises an inner container, wherein the outer side of the inner container is sleeved with a shell, the upper end of the shell is provided with a protective cover, a storage tank and a water inlet pipe are arranged in the protective cover, the bottom of the storage tank is connected with a liquid adding pipe communicated with the inner container, a first electromagnetic valve is arranged on the liquid adding pipe, a second electromagnetic valve and a pneumatic booster pump are arranged on the water inlet pipe, the water outlet end of the water inlet pipe is connected with a flushing pipe, and the end part of the flushing pipe is provided with a spray head. Through adding the cleaner to the inner bag, combine the inner wall of high pressure rivers to the inner bag to wash, simultaneously, can utilize the heating rod to heat for incrustation scale cleaning rate and disinfect to realized regularly wasing the inner bag, avoided the inside incrustation scale of inner bag to accumulate with the bacterium for a long time, the reduction of incrustation scale can increase in the use heating time and energy loss, reduces the heating noise, has increased the safety and the health of use. However, such a solution requires a special cleaning operation, requires the addition of a cleaning agent and the cleaning of the liner, and cannot be carried out in daily use. Therefore, although the regular operation can reduce the storage amount of scale and bacteria in the storage tank, tap water is provided with scale ions and germ microorganisms, the scale ions and germ microorganisms can be generated in real time in the use process, the device and the operation cannot cause the scale and the germ microorganisms brought in real time in the use process, and the scale and the germ can still enter a cold water outlet and a shower head, and also corrode the liner to influence the service life of the water heater.

Therefore, there are also cleaning devices using electrode electrolyzed water such as a CN2015160233. X electric water heater and a CN202022787697.5 for water heater. The principle of the device is that scale metal ions are attracted to the vicinity of a cathode through an electrified electrode to precipitate or the scale is settled by combining hydroxide ions, carbonate ions and the like which are directly or indirectly generated by electrolysis; and meanwhile, the water hydroxyl, ions and the like generated by electrolysis are used for sterilization and disinfection. The device can perform real-time treatment on water flow, can perform scale removal and sterilization on water source and water storage of the water heater at any time in use, and has better use effect. They also have the following disadvantages:

1. besides the water source treatment, the water in the water storage tank of the electric water heater needs to be treated for a long time due to the characteristic of long-term water storage and heating. The water tank is provided with the electrolysis electrode, the water heater is required to be modified, and the water heater is not suitable for the common water heaters in the market. And the electrodes are also maintenance-requiring, the electrodes in the can are very inconvenient to maintain.

2. Long-term treatment of water in a tank means long-term power-on electrolysis, which wastes electric energy and water, is very easy to cause excessive electrolysis, generates excessive waste gas, and causes corrosion hidden trouble due to excessive oxygen, ions and free radicals with strong oxidability. Even if this problem is solved by adding time-limited energization of an automated or intelligent electronic control device, system complexity and cost are increased.

Therefore, the above-mentioned devices have not been widely popularized. The product with higher practicability is still needed in the market, is purely external to adapt to various water heaters, and can meet the requirement of real-time treatment of water and avoid the waste and side effects caused by long-term power on.

Disclosure of Invention

(one) solving the technical problems

The utility model aims to solve the problems and provide the sterilizing and descaling device for the water heater, so as to solve the problems of real-time descaling and sterilization, ensuring the clean and scale-free inside the water heater and water outlet of the water heater, and avoiding the waste and side effects caused by long-term power-on in the prior art.

(II) technical scheme

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the sterilizing and scale reducing device of the water heater comprises a sterilizing box, wherein the interior of the sterilizing box is divided into a first electrolytic cavity, a second electrolytic cavity and a filter cavity, wherein the first electrolytic cavity, the second electrolytic cavity and the filter cavity are respectively arranged at the upper part and the bottom, and a one-way valve is arranged between the bottom of the first electrolytic cavity and the filter cavity; the inside of the first electrolytic cavity and the inside of the second electrolytic cavity are respectively provided with an electrolytic electrode plate, and one side of each electrolytic electrode plate is fixedly connected with a constant current voltage regulating plate; a filter material is arranged in the filter cavity; the top of the first electrolysis cavity is provided with a cold water port connected with a tap water pipe, one end of the filter cavity, which is far away from the one-way valve, is provided with a cold water outlet, the cold water outlet is connected with a water inlet of the water heater, the top of the second electrolysis cavity is provided with a hot water inlet, the hot water inlet is connected with the water outlet of the water heater, and the bottom of the second electrolysis cavity is provided with a hot water outlet.

Preferably, it is: the electrolytic electrode sheet is a flaky titanium electrode; the anode coating of the flaky titanium electrode is platinum, and the cathode is pure titanium; the electrodes comprise a plurality of groups, and anodes and cathodes are arranged at intervals.

Preferably, it is: the bottom of the cold water port and the bottom of the hot water inlet are respectively provided with a water flow trigger switch, and the two water flow trigger switches are respectively electrically connected with the two electrolytic electrode plates to control the on-off of the electrolytic electrode circuit.

Preferably, it is: the water flow trigger switch comprises a micro switch and a pressing plate, the middle of the pressing plate is respectively hinged to the bottoms of the cold water inlet and the hot water inlet, and one end of the pressing plate is opposite to the cold water inlet and the hot water inlet; the other end is opposite to the micro switch and can be pressed down to trigger the micro switch, and the other end is supported by a pressure spring fixed at the top of the electrolysis cavity and is far away from the micro switch; when water flows are supplied to the cold water inlet and the hot water inlet, the pressing plates are respectively impacted, and one ends of the pressing plates, which are opposite to the micro switch, trigger the micro switch.

The pressing plate is pushed by water flow and is pressed down like a seesaw to push the micro switch passage, so that the circuit works. When the water heater does not work and no water flows through the device, the pressure spring enables the pressure plate to reset, a circuit is broken, electric energy waste is reduced, and meanwhile, an ion corrosion system generated by excessive electrolysis is avoided.

Preferably, the top of the first electrolysis cavity and the top of the second electrolysis cavity are respectively provided with a pressure release valve.

Preferably, the cold water port (4), the cold water outlet (6), the hot water inlet (3) and the hot water outlet (5) are all provided with switch valves, and the side surface or the bottom surface plate of the sterilization box (15) is detachably connected with the filter cavity in a buckling mode. This design facilitates disassembly for maintenance.

Preferably, the cold water port (4) and the hot water inlet (3) are respectively and movably connected with the water heater (1) through connecting water pipes (24). Is convenient for maintenance, such as adding a scale remover, a cleaning agent and the like, and the disassembly and the installation under the general environment are also convenient.

Preferably, the constant current voltage regulating plate is connected with a power supply, the constant current voltage regulating plate is fixedly connected with the sterilization box, and a wire is arranged between the constant current voltage regulating plate and the electrolytic electrode plate.

Preferably, the constant-current voltage regulating plate, the lead and the electric connection part are all waterproof sealed, so that the tightness and the service life are ensured.

Preferably, the filter material is one or a combination of a plurality of melt-blown PP filter element, activated carbon and ultrafiltration membrane, and the utility model provides a sterilizing and descaling device for a water heater, which has the following beneficial effects:

1. the sterilizing and descaling device of the water heater realizes instant and efficient water purification and descaling. The scale, microorganism and other impurities in the water are cleared to the maximum extent by utilizing the electrolysis and the filter material, so that the water purifying effect is ensured. The device can work simultaneously with the water heater to perform real-time treatment.

2. The sterilizing and scale-reducing device of the water heater is externally used without modifying the water heater. The water heater is suitable for all water heaters in the market and has wide adaptability.

3. The independent filter cavity is additionally arranged, so that the basic effects of removing precipitated scale, microorganism corpse and other impurities can be achieved, oxygen, water hydroxyl or other corrosive substances generated by the electrolyzed water can be removed by filtration after the first electrolytic treatment, the corrosive side effect of the electrolyzed water product after entering the water heater is reduced, and the safety of the inner container of the water heater is ensured. The second electrolysis chamber arranged at the rear part is also arranged at the outside of the water heater, so that compared with the electrolysis in the water heater, the corrosion of electrolysis products to the water storage tank and the overpressure side effect of waste gas can be thoroughly avoided.

4. The sterilizing and scale-reducing device of the water heater adopts two-stage electrolytic purification, and simultaneously ensures that water inlet and water outlet of the water heater are clean. The water source entering the water heater passes through the first electrolytic cavity and the filter cavity, and enters the water heater after sterilization and descaling, so that the corrosion influence of scale on the inner container of the water heater is reduced to the greatest extent, and the sources of scale and microorganisms are reduced. Meanwhile, after water is discharged from the water heater, the water is subjected to secondary sterilization and descaling through the second electrolysis cavity, so that hidden danger of re-precipitation of scale which is not completely removed or re-breeding of microorganisms in the long-term water storage process is reduced, and the purification effect of the final water is ensured.

5. The sterilizing and scale reducing device of the water heater adopts the water flow trigger switch to control the electrolytic reaction, does not need a complex electric control device, and only carries out real-time treatment on a water source and water outlet when the water heater is used for supplementing water or discharging water. Simple structure, low cost, energy and water saving, and can prevent waste caused by excessive electrolysis, excessive waste gas and corrosion side effect.

6. The sterilizing and scale-reducing device of the water heater is convenient to maintain. The valves of each water inlet can be closed, then the valve is opened after being waterproof, the filter material is replaced, and the electrode is cleaned. Or directly adding a scale remover such as citric acid or other cleaning agents to clean the interior.

7. Simple structure, flexible installation and good practicability.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the T-shaped plate of the present utility model;

FIG. 3 is a schematic view showing a partial structure of the sterilization case according to the present utility model;

fig. 4 is a side view of fig. 2.

In the figure: 1. a water heater; 2. a shower head; 3. a hot water inlet; 4. a cold water port; 5. a hot water outlet; 6. a cold water outlet; 7. a T-shaped plate; 8. an electrolytic electrode sheet; 9. a one-way valve; 10. a filter material; 11. a micro-switch; 12. a pressing plate; 13. constant-current pressure regulating plate; 14. a wire; 15. a sterilization box; 16. a power line; 17. a switch valve; 21. the first electrolytic cavity, 22, the second electrolytic cavity, 23, the filter cavity, 24 and the connecting water pipe.

Detailed Description

The embodiment of the utility model provides a sterilizing and scale-reducing device of a water heater.

Referring to fig. 1, 2 and 4, a sterilizing box 15 is arranged between a water heater 1 and a shower 2, a T-shaped plate 7 is fixedly connected inside the sterilizing box 15, the T-shaped plate 7 divides the inside of the sterilizing box 15 into three parts, namely a first electrolytic cavity 21, a second electrolytic cavity 22 and a filter cavity 23, which are respectively arranged at the upper part and the bottom, a one-way valve 9 is arranged between the bottom of the first electrolytic cavity 21 and the filter cavity 23 to prevent the backflow of filtered water; one side of the electrolytic electrode plate 8 is fixedly connected with a constant current voltage regulating plate 13, the constant current voltage regulating plate 13 is connected with a power supply, the constant current voltage regulating plate 13 is fixedly connected with a sterilizing box 15, a lead 14 is arranged between the constant current voltage regulating plate 13 and the electrolytic electrode plate 8, the electrolytic electrode plate 8 is arranged in a first electrolytic cavity 21 and a second electrolytic cavity 22, a filter material 10 is arranged in the filter cavity, and the filter material 10 comprises one or a combination of a plurality of active carbon, a melt-blown PP filter element and an ultrafiltration membrane.

The top of the first electrolysis cavity 21 is provided with a cold water port 4 which is connected with a tap water pipe and is used for water inlet of the device. The top of the first electrolysis cavity and the top of the second electrolysis cavity are respectively provided with a pressure release valve so as to discharge the electrolysis gas conveniently.

One side of the sterilizing box 15 is fixedly connected with a power line 16, one end of a filter cavity 23, which is far away from the one-way valve 9, is provided with a cold water outlet 6 which is connected with a water inlet of the water heater 1 through a connecting water pipe 24, the top of a second electrolysis cavity 22 is provided with a hot water inlet 3 which is connected with a water outlet of the water heater 1 through the connecting water pipe 24, and the bottom of the second electrolysis cavity is provided with a hot water outlet 5 which is connected with the shower head 12 through the connecting water pipe 24.

The constant current voltage regulating plate 13 is specifically a commercial DC adjustable constant current power supply module matched with a DC power supply adapter, the DC power supply adapter is connected with commercial power, and the principle of the DC adjustable constant current power supply module is that a constant current source circuit is formed by two triodes or voltage stabilizing diodes and is used for outputting current with stable magnitude and stabilizing the electrolysis rate. In this example, the input voltage was 12v and the output constant current was 5A.

The electrolytic electrode sheet 8 is a flaky titanium electrode, the anode coating is platinum, and the cathode is pure titanium; the electrodes comprise a plurality of groups, anodes and cathodes are arranged at intervals, and the gap between the two electrode plates is 4mm. The specific bactericidal substance water hydroxyl is generated in the electrochemical electrolysis hot water process of the working electrolytic electrode plate 8, and the water hydroxyl with super strong oxidability can directly react with substances such as bacteria, viruses and the like in water to oxidize and decompose the substances. The strong oxidizing property near the anode can directly oxidize partial microorganisms such as bacteria, viruses and the like in the electrochemical process; the sterilization effect of tap water is achieved through the combined action of the above points; meanwhile, calcium and magnesium ions in water can be combined near the cathode, so that scale is formed on the electrode plate, and the formation of the scale in the water heater is reduced. Compared with other electrodes, the platinum-plated electrode can improve oxidation efficiency more pertinently, improve oxidation potential of oxygen element, and provide more effective substances such as water hydroxyl.

Referring to fig. 2, the bottoms of the cold water inlet 4 and the hot water inlet 3 are respectively provided with a water flow trigger switch, and the two water flow trigger switches are respectively electrically connected with the two electrolytic electrode plates 8 to control the on-off of the electrolytic electrode circuit. The water flow trigger switch comprises a micro switch 11 and a pressing plate 12, the middle of the pressing plate 12 is respectively hinged to the bottoms of the cold water port 4 and the hot water inlet 3, and one end of the pressing plate is opposite to the cold water port 4 and the hot water inlet 3 and can be pushed by water flow; the other end of the pressing plate 12 is opposite to the micro switch 11 and can press down to trigger the micro switch 11, the end is propped against the pressure spring fixed at the top of the electrolysis cavity, and when one end of the cold water inlet 4 and one end of the hot water inlet 3 do not have water flow impact, the end of the micro switch 11 is far away from the micro switch. When water passes through the cold water port 4 and the hot water inlet 3, the pressing plate 12 is pushed, the other end of the pressing plate 12 is reversely pressed downwards like a teeterboard, and the micro switch 11 is triggered, so that the electrode circuit is triggered to be electrified and run. When the water flow stops, the pressing plate 12 is reset under the action of the pressure spring, the micro switch 11 is opened, and the electrode stops working.

The cold water inlet 4, the cold water outlet 6, the hot water inlet 3 and the hot water outlet 5 are all provided with switch valves, and the side surface or the bottom surface of the sterilizing box 15 is detachably connected with the filter cavity 23 in a buckling mode. The design is convenient for disassembly and maintenance; the cold water port 4 is movably connected with a tap water pipe. Through this design, make things convenient for inside drainage and open, carry out inside maintenance, clearance and consumptive material change.

The constant current voltage regulating plate 13 is connected with a power supply, the constant current voltage regulating plate 13 is fixedly connected with the sterilization box 15, and a wire is arranged between the constant current voltage regulating plate and the electrolytic electrode plate.

The constant current voltage regulating plate 13, the lead 14 and the electric connection parts are all sealed by waterproof sealing, and are sealed by a polymer insulating layer, waterproof silica gel and other modes, so that water is prevented from entering the circuit to damage elements.

The operation process and principle of the device are as follows:

the T-shaped plate 7 is fixedly connected inside the sterilization box 15, the sterilization box 15 is divided into three cavities by the T-shaped plate 7, and two groups of electrolytic electrode plates 8 and one filter material 10 are respectively arranged inside the three cavities. Wherein the first electrolysis chamber 21 processes tap water to be fed into the water heater, and the tap water is fed into the filter chamber 23 after being processed to further remove impurities. And then the purified water flows into the water heater, and enters the second electrolysis cavity 22 for secondary treatment after being heated, so that the clean water is ensured.

Specifically, when the user uses the water heater 1, and the shower head 2 leads to water, the hot water after the water heater 1 heats gets into the inside second electrolysis chamber 22 of disinfect box 15 through hot water inlet 3, and the clamp plate 12 of hot water inlet 3 department receives rivers to promote and triggers micro-gap switch 11 to start the electrolysis electrode 8 in the second electrolysis chamber 22, supply with shower head 2 through hot water delivery port 5 after with hot water oxidation sterilization, guarantee the clean of hot water, reduce the influence of bacterium to the user.

Meanwhile, the water heater 1 needs to be replenished with cold water at this time. After tap water enters a first electrolytic cavity 21 in a sterilization box 15 through a cold water port 4, a micro switch 11 is triggered by water flow at the cold water port 4 to start, so that an electrolytic electrode 8 in the first electrolytic cavity 21 is operated, cold water is sterilized and descaled through the electrolytic electrode sheet 8 and flows into a filter cavity 23 through a one-way valve 9, the sterilized tap water is filtered and purified by a filter material 10, the filter material 10 can adsorb impurities separated out in the tap water in the first electrolytic cavity 21 in a mode of electrolysis, oxidization or combination with hydroxyl, and the like, and impurities in water can thoroughly reduce scale, and various particle impurities such as silt, rust, and the like in filtered liquid can be effectively removed. The filter element consists of active carbon, a porous PP filter element with nominal filtering precision of 1 micron and an ultrafiltration membrane. After passing through the filter material, free ions and water hydroxyl generated in electrolysis are mostly adsorbed due to higher reactivity besides particulate matters, so that corrosion of electrolysis products to a water heater is reduced. The one-way valve 9 prevents the filtered water from flowing back, and reduces the waste of repeated electrolysis. The purified water after complete filtration and disinfection enters the water inlet end of the water heater 1 through the cold water outlet 6, so that hidden danger of scale generation, liner corrosion and microorganism breeding in the water heater 1 is comprehensively reduced, and economic cost investment required by maintenance of the water heater 1 is reduced.

The integrated external sterilization box 15 can simultaneously ensure the real-time purification treatment of water inlet and water outlet of the water heater, can be used for purification at any time, and can also avoid the corrosion side effect of oxidation products on the inner container of the water heater.

The constant current voltage regulating plate 13 and the lead 14 are matched to control the operation of the electrolytic electrode plate 8, so that the high efficiency of the electrolytic sterilization effect is ensured, the constant current voltage regulating plate 13 stabilizes the current, and sterilization and descaling are completed with proper current density. And all be provided with clamp plate 12 in hot water inlet 3 and cold water mouth 4 bottom, when hot water gets into the inside of the case 15 of disinfecting through hot water inlet 3 to and the running water is got into the inside of the case 15 of disinfecting through cold water mouth 4, can both make clamp plate 12 by the rivers impact, form the pressing effect, make clamp plate 12 remove control micro-gap switch 11 work. The microswitch 11 controls the electrolytic electrode plate 8 to work, so that the electrolytic electrode plate 8 automatically works when water exists outside, the electrolytic electrode plate 8 is ensured to work according to the flowing of water flow, and the resource waste and the operation steps of workers are reduced.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (9)

1. The utility model provides a water heater disinfects and subtracts dirty device, includes disinfect box (15), its characterized in that: the inner part of the sterilization box (15) is divided into a first electrolytic cavity, a second electrolytic cavity and a filter cavity, wherein the first electrolytic cavity, the second electrolytic cavity and the filter cavity are respectively arranged at the upper part and the bottom, and a one-way valve (9) is arranged between the bottom of the first electrolytic cavity and the filter cavity; the inside of the first electrolytic cavity and the inside of the second electrolytic cavity are respectively provided with an electrolytic electrode plate (8), and one side of the electrolytic electrode plate (8) is fixedly connected with a constant current voltage regulating plate (13); a filter material (10) is arranged in the filter cavity; the utility model discloses a water heater, including first electrolysis chamber top, second electrolysis chamber bottom, first electrolysis chamber top is provided with cold water mouth (4) with running water union coupling, the one end that the check valve (9) was kept away from to the filter chamber is provided with cold water delivery port (6), and cold water delivery port (6) link to each other with the water heater water inlet, second electrolysis chamber top is provided with hot water inlet (3), and hot water inlet (3) link to each other with the water heater delivery port, and second electrolysis chamber bottom is provided with hot water delivery port (5).

2. The sterilizing and descaling device for water heater according to claim 1, wherein: the electrolytic electrode sheet (8) is a sheet-shaped titanium electrode; the anode coating of the flaky titanium electrode is platinum, and the cathode is pure titanium; the electrodes comprise a plurality of groups, and anodes and cathodes are arranged at intervals.

3. The sterilizing and descaling device for water heater according to claim 1, wherein: the bottoms of the cold water port (4) and the hot water inlet (3) are respectively provided with a water flow trigger switch, and the two water flow trigger switches are respectively electrically connected with the two electrolytic electrode plates (8) to control the on-off of the electrolytic electrode circuit.

4. The sterilizing and descaling device for water heater according to claim 3, wherein: the water flow trigger switch comprises a micro switch (11) and a pressing plate (12), the middle of the pressing plate (12) is respectively hinged to the bottoms of the cold water port (4) and the hot water inlet (3), and one end of the pressing plate is opposite to the cold water port (4) and the hot water inlet (3); the other end is opposite to the micro switch (11) and can be pressed to trigger the micro switch (11), and the other end is supported by a pressure spring fixed at the top of the electrolysis cavity and is far away from the micro switch (11); when water flows exist in the cold water port (4) and the hot water inlet (3), the pressing plates (12) are respectively impacted, and one ends of the pressing plates (12) opposite to the micro-switches (11) trigger the micro-switches (11).

5. The sterilizing and descaling device for water heater according to any of claims 1-4, wherein: and pressure release valves are arranged at the tops of the first electrolysis cavity and the second electrolysis cavity.

6. The sterilizing and descaling device for water heater according to any of claims 1-4, wherein: the cold water port (4), the cold water outlet (6), the hot water inlet (3) and the hot water outlet (5) are respectively provided with a switch valve, and the side surface or the bottom surface plate of the sterilizing box (15) is detachably connected with the filter cavity in a buckling mode.

7. The sterilizing and descaling device for water heater according to any of claims 1-4, wherein: the cold water port (4) and the hot water inlet (3) are respectively and movably connected with the water heater (1) through connecting water pipes (24).

8. The sterilizing and descaling device for water heater according to any of claims 1-4, wherein: the constant-current pressure regulating plate (13) and the electric connection part are waterproof sealed.

9. The sterilizing and descaling device for water heater according to any of claims 1-4, wherein: the filter material (10) is one or a combination of a plurality of melt-blown PP filter elements, activated carbon and ultrafiltration membranes.