CN210399491U - Stepping type variable-frequency water boiler - Google Patents

Abstract

The utility model discloses a marching type frequency conversion water dispensers relates to electric water boiler technical field, has solved electric water boiler and has been difficult to the high-efficient technical problem who carries out two courage step-by-step heating. Its technical essential is including being provided with the first water courage that is used for initial heating to the warm water, the second water courage of intercommunication first water courage in order to be used for storing the boiling water, set up in the inlet tube of first water courage bottom in order to be used for the supply raw water, set up in the delivery port of second water courage lower half in order to be used for the discharge boiling water and set up respectively in first frequency conversion heating pipe and the second frequency conversion heating pipe of heating in first water courage and second water courage, the upper end of first water courage is provided with the overflow mouth that is used for the warm water to flow in the second water courage, the interior bottom of first water courage is provided with the end cap mechanism of intaking that is used for guiding water source level towards first inner bag lateral wall, the utility model has the advantage of the.

Description

Stepping type variable-frequency water boiler

Technical Field

The utility model relates to an electric water boiler technical field, more specifically say, it relates to a marching type frequency conversion water dispensers.

Background

The existing water boiler uses barreled water or is connected with a tap water pipeline through a water inlet, water is injected into a water liner provided with a variable-frequency heating pipe, raw water can be boiled to more than 95 degrees, when boiled water in the water liner is taken to a certain amount, cold water needs to be supplemented and injected for reheating, in order to keep the water temperature, the boiled water in the water liner needs to be repeatedly boiled, the power consumption is large, the water in the water liner is repeatedly boiled, the water quality can be poor, and the health of a human body can be influenced after drinking.

Chinese patent with publication number CN204358944U discloses a double-container stepping water-saving electric water boiler, which comprises an electric water boiler, wherein one side of the electric water boiler is provided with a water outlet, the bottom of the electric water boiler is provided with a water inlet, an electric heating tube is arranged above the water inlet, the electric heating tube is horizontally arranged in the electric water boiler, a water temperature sensor is arranged above the electric heating tube, a lower water level sensor and an upper water level sensor are sequentially arranged above the water temperature sensor, and a flow limiting valve is arranged at the water inlet.

In the prior art, similar to the electric water boiler, the layered boiling is realized by adopting a layered water inlet and layered heating mode, the raw water and the boiled water are completely layered by utilizing the principle that the raw water and the boiled water have different specific gravities, and the phenomenon of yin and yang water is avoided; however, because the water inlet is directly injected into the electric boiled water tank from bottom to top, if the flow rate of the injected raw water is high, a large amount of raw water is mixed into the boiled water layer and then the raw water is poured into the boiled water layer to generate yin and yang water, if only a slow water inlet mode is used, the heating efficiency of the electric boiled water machine is affected, and the efficiency of layered step-by-step heating is reduced, so that improvement is needed.

SUMMERY OF THE UTILITY MODEL

To the technical problem that has now, an object of the utility model is to provide a marching type frequency conversion water dispensers, its advantage that has the high efficiency and carry out the step-by-step heating of two courages.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a marching type frequency conversion water boiler, is including being provided with first water courage, the first water courage of intercommunication that is used for primary heating to the warm water second water courage for storing the boiling water, set up in first water courage bottom in order to be used for supplying raw water inlet tube, set up in the delivery port of second water courage lower half in order to be used for the boiled water of discharging and set up respectively in first water courage and second water courage in order to be used for first frequency conversion heating pipe and the second frequency conversion heating pipe of heating, the upper end of first water courage is provided with the overflow mouth that is used for the warm water to flow into second water courage, the interior bottom of first water courage is provided with the water inlet plug mechanism that is used for guiding water source level towards first inner bag lateral.

By adopting the technical scheme, the raw water is preliminarily heated to a warm water state by arranging the first water container, the bottom end of the first water container is provided with the water inlet pipe to inject the raw water into the first variable-frequency heating pipe for heating, the warm water in the first water container is stored together by arranging the second water container with the lower half part provided with the water outlet, the warm water at the upper layer of the first water container can flow into the second water container from the overflow port layer by layer, the warm water at the lower half part of the second water container is heated to the boiled water which can be drunk through the second variable-frequency heating pipe, the drinking water of the second water container is prevented from having negative and positive water, the water inlet plug mechanism is arranged at one end part of the water inlet pipe extending into the first water container, when the water inlet pipe starts to supply water, the water column vertically upwards flows into the water inlet plug mechanism, then flows to the inner side wall of the first water container from a plurality of horizontal outlets in the water inlet, the quantity of the upper-layer warm water can be kept under the condition of high injection speed of the raw water, the layering effect can be kept, and the effect of efficiently carrying out double-container stepping heating is realized.

The utility model discloses further set up to: the water inlet plug mechanism comprises a baffle plate arranged at the bottom end inside the first water container and used for shielding a water inlet column from ascending vertically and a plurality of supporting blocks arranged on the lower surface of the baffle plate and used for supporting the baffle plate, and the supporting blocks are respectively positioned at two sides of one end of the first water container, which is stretched into by the water inlet pipe.

Through adopting above-mentioned technical scheme, form into water end cap mechanism through setting up the shielding plate and a plurality of supporting shoe combination, erect the shielding plate in the inlet tube top through a plurality of supporting shoes, the water column is towards the lower surface impact back of shielding plate, and turn flows towards the inside wall of first water container behind the horizontal flow direction, can subduct the impulsive force of water column, realizes the effect of convenient improvement marching type mode of intaking.

The utility model discloses further set up to: the water level detecting device is characterized in that a first water level probe and a second water level probe are respectively arranged in the first water container and the second water container, the first water level probe is close to and arranged above the first variable-frequency heating pipe, the second water level probe is close to and arranged above the second variable-frequency heating pipe, and the first water level probe and the second water level probe are respectively and electrically connected with control switches of the first variable-frequency heating pipe and the second variable-frequency heating pipe.

Through adopting above-mentioned technical scheme, through setting up first water level probe in first water courage, and first water level probe is located the top of first variable frequency heating pipe and closes on the position, avoid first variable frequency heating pipe dry combustion method to lead to first variable frequency heating pipe to damage under the anhydrous condition, set up second water level probe in second water courage again, and the top that second water level probe is located second variable frequency heating pipe closes on the position, avoid second variable frequency heating pipe dry combustion method to lead to second variable frequency heating pipe to damage under the anhydrous condition, realize the effect of protection first variable frequency heating pipe and second variable frequency heating pipe.

The utility model discloses further set up to: the water level sensor is characterized in that a first temperature probe is arranged in the first water container, the first temperature probe is arranged between the first water level probe and the first variable-frequency heating pipe, a water inlet electromagnetic valve is arranged on the water inlet pipe, and the first temperature probe is electrically connected with the water inlet electromagnetic valve.

Through adopting above-mentioned technical scheme, be connected with the solenoid valve electricity of intaking on the inlet tube through the first temperature probe that sets up in first water container, through the temperature between first temperature probe monitoring first water level probe and the first variable frequency heating pipe, after the temperature of first temperature probe reached the temperature value of settlement, the solenoid valve of intaking can pour into raw water into first water container after receiving the signal in, raw water can be followed the bottom and upwards be upwards the propelling movement with the warm water that has heated, realizes the effect that convenient control inlet tube was intake.

The utility model discloses further set up to: and a second temperature probe is arranged in the second water container, the second temperature probe is arranged at the position close to the water outlet, and the second temperature probe is electrically connected with a control switch of the second variable-frequency heating pipe.

By adopting the technical scheme, whether the temperature of the water outlet reaches the drinkable temperature or not can be monitored by arranging the second temperature probe at the water outlet in the second water container, and if the temperature of the water outlet at the position close to the water outlet is lower than the set temperature of the second temperature probe, the second variable frequency heating pipe receives the working electric signal and heats the working electric signal, so that the working effect of the second variable frequency heating pipe is automatically controlled.

The utility model discloses further set up to: and a third temperature probe is arranged in the first water container and positioned at the overflow port, a fourth temperature probe is arranged in the second water container and positioned at the overflow port, and the third temperature probe and the fourth temperature probe are electrically connected with the first variable-frequency heating pipe.

Through adopting above-mentioned technical scheme, through setting up third temperature probe and fourth temperature probe respectively in first water container and second water container and be located the both ends department of overflow mouth, the temperature of the water inlet department of overflow mouth is monitored to the third temperature probe, can monitor the temperature of first water container overflow to the second water container, avoids the warm water that first water container flowed into in the second water container to be less than the settlement temperature, realizes the effect of the first water container leaving water temperature of high-efficient monitoring.

The utility model discloses further set up to: the upper end of first water courage and second water courage all is provided with third water level probe and the fourth water level probe that is used for monitoring full water state, third water level probe and fourth water level probe all are connected with the solenoid valve electricity of intaking.

Through adopting above-mentioned technical scheme, through setting up third water level probe in the upper end of first water courage and fourth water level probe in the upper end of second water courage for water inlet solenoid valve can be controlled to third water level probe when first water courage water yield is full, water inlet solenoid valve can be controlled to fourth water level probe when the water yield in the second water courage is full, it is impaired to avoid the too big first water courage and the second water courage that leads to of water yield load, realize the effect of the total water yield of the first water courage of convenient control and second water courage.

The utility model discloses further set up to: the upper ends of the first water container and the second water container are both provided with descaling holes, and the descaling holes are in threaded connection with blocking pieces.

Through adopting above-mentioned technical scheme, through setting up in the scale removal hole of first water courage and second water courage upper end, with stifled piece threaded mounting on the scale removal hole, pour the detergent into in first water courage and the second water courage, after the reaction of certain time, clear away the water after will handling from the scale removal hole again, realize the effect of convenient washing first water courage and the interior incrustation scale of second water courage.

The utility model discloses further set up to: the bottom of first water courage is provided with first drain pipe, the bottom of second water courage is provided with the second drain pipe, first drain pipe is linked together and the intercommunication department is provided with the drainage solenoid valve with the second drain pipe.

Through adopting above-mentioned technical scheme, through setting up first drain pipe and second drain pipe in the bottom of first water courage and second water courage respectively, the detergent takes place certain reaction back, opens the control switch of drainage solenoid valve, and the hydroenergy in first water courage and the second water courage can be followed first drain pipe and second drain pipe respectively and flowed out, realizes the effect of convenient drainage.

The utility model discloses further set up to: still be provided with the shell on the outer wall of first water courage and second water courage, all be provided with the heat preservation between shell and the outer wall of first water courage and second water courage.

Through adopting above-mentioned technical scheme, enclose the shell that closes on first water courage and the second water courage through the setting, be provided with the heat preservation between shell inner wall and first water courage and the second water courage outer wall, avoid the heat in first water courage and the second water courage to scatter and disappear, realize improving the heat preservation effect of first water courage and second water courage.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) by arranging the first water container for step-by-step heating and the second water container for heating and storing boiled water, raw water is injected from the bottom of the first water container along the water inlet pipe, the flowing direction of an injected water column is changed by the water inlet plug mechanism, so that the raw water can be stably pushed upwards to push a warm water layer and then flows into the second water container from an overflow port on the first water container, and the effect of efficiently carrying out double-container step-by-step heating is achieved;

(2) the water inlet plug mechanism formed by combining a plurality of supporting blocks and the shielding plate is arranged, the supporting blocks are arranged on two sides of the water inlet pipe, after a water column for feeding water vertically and upwards impacts the lower surface of the shielding plate, the water flow direction is converted from the vertical direction to the direction horizontally facing the inner side wall of the first water container, and the effect of preventing raw water from vertically and upwards impacting a mixed temperature water layer is achieved;

(3) supply the detergent to drip into in first water courage and the second water courage through the scale removal hole that sets up first water courage and second water courage upper end, with stifled piece threaded connection on the scale removal hole, set up first drain pipe and second drain pipe respectively in the bottom of first water courage and second water courage, clear up the water after the inside processing through setting up first discharge tube of drainage solenoid valve control and second drain pipe, have the effect of convenient clearance incrustation scale.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is an enlarged view of part A of FIG. 1;

FIG. 3 is a schematic layout view of the temperature control system and the water level monitoring system according to the present embodiment;

FIG. 4 is a top view of the present embodiment;

FIG. 5 is an enlarged view of part A of FIG. 3 according to the present embodiment;

fig. 6 is an enlarged schematic view of part B in fig. 3 according to the present embodiment.

Reference numerals: 1. a first water bladder; 2. a second water container; 3. a temperature control system; 31. a first temperature probe; 32. a second temperature probe; 33. a third temperature probe; 34. a fourth temperature probe; 4. a water level monitoring system; 41. a first water level probe; 42. a second water level probe; 43. a third water level probe; 44. a fourth water level probe; 5. a descaling structure; 51. descaling holes; 52. plugging pieces; 53. a second drain pipe; 54. a water discharge electromagnetic valve; 6. a first variable frequency heating pipe; 7. a second variable frequency heating pipe; 8. an overflow port; 9. a water inlet plug mechanism; 91. a shielding plate; 92. a support block; 10. a water inlet electromagnetic valve; 11. a water inlet pipe; 12. a water outlet; 13. a housing; 14. and (7) an insulating layer.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

The utility model provides a marching type frequency conversion water dispensers, as shown in figure 1, including be provided with be used for the primary heating to the first water courage 1 of warm water, communicate first water courage 1 with the second water courage 2 that is used for storing the boiling water, set up on first water courage 1 and second water courage 2 with the temperature control system 3 that is used for monitoring the temperature, set up on first water courage 1 and second water courage 2 with the water level monitoring system 4 that is used for monitoring the water level and set up on first water courage 1 and second water courage 2 with the scale removal structure 5 that is used for clearing up inside incrustation scale.

Wherein, still including setting up respectively in first water courage 1 and second water courage 2 in order to be used for the first variable frequency heating pipe 6 and the second variable frequency heating pipe 7 of heating, the upper end of first water courage 1 is provided with the overflow mouth 8 that is used for the warm water to flow into second water courage 2, 1 bottom of first water courage is provided with the inlet tube 11 that is used for supplying raw water, be provided with the solenoid valve 10 that intakes that is used for controlling the supply volume of intaking on the inlet tube 11, 2 lower halves of second water courage are provided with the delivery port 12 that is used for the boiling water of discharging, the inlet tube 11 one end that stretches into first water courage 1 is provided with the end cap mechanism 9 that intakes that is used for changing the water column direction of intaking, end cap mechanism 9 that intakes can guide the water. When the water inlet electromagnetic valve 10 is opened, raw water is conveyed to the bottom of the first water container 1 along the water inlet pipe 11, a water column vertically and upwards flows into the water inlet plug mechanism 9, and then flows to the inner side wall of the first water container 1 from a plurality of horizontal outlets in the water inlet plug mechanism 9, so that the raw water is prevented from vertically and upwards rushing to muddy a heated warm water layer, and the effect of stably and quickly injecting the raw water is achieved; wherein, the power of the first variable-frequency heating pipe 6 and the second variable-frequency heating pipe 7 is 500W-3000W.

As shown in fig. 2, the water inlet plug mechanism 9 includes a shielding plate 91 disposed at the bottom end inside the first water container 1 for shielding the water inlet column from ascending vertically and a plurality of supporting blocks 92 disposed on the lower surface of the shielding plate 91 for supporting the shielding plate 91, and each supporting block 92 is respectively located at the left and right sides of one end of the first water container 1, which is extended into the water inlet pipe 11. After the water column collides with the lower surface of the shielding plate 91, the water flow direction is turned from the vertical direction to the horizontal direction, and the raw water can flow towards the inner side wall of the first water container 1 and gradually rises upwards along the lower part of the first water container 1, so that the heated warm water layer is pushed upwards.

As shown in fig. 3, the temperature control system 3 includes a first temperature probe 31 disposed in the first water container 1 for monitoring the water temperature near the first variable-frequency heating pipe 6, a second temperature probe 32 disposed in the second water container 2 for monitoring the water temperature near the water outlet 12, a third temperature probe 33 disposed in the first water container 1 and located at the overflow port 8 for monitoring the water temperature at the water inlet end of the overflow port 8, and a fourth temperature probe 34 disposed in the second water container 2 and located at the overflow port 8 for monitoring the water temperature at the water outlet end of the overflow port 8; wherein, the first temperature probe 31 is arranged between the first water level probe 41 and the first variable-frequency heating pipe 6 and is electrically connected with the water inlet electromagnetic valve 10, the second temperature probe 32 is arranged at the position close to the water outlet 12 and is electrically connected with the control switch of the second variable-frequency heating pipe 7, and the third temperature probe 33 and the fourth temperature probe 34 are connected in series to control the control switch of the first variable-frequency heating pipe 6; the specific set temperature values of the first temperature probe 31, the third temperature probe 33, and the fourth temperature probe 34 are 85 degrees, and the specific set temperature value of the second temperature probe 32 is 95 degrees. An operator sets temperature values of the first temperature probe 31, the second temperature probe 32, the third temperature probe 33 and the fourth temperature probe 34 according to needs, the first variable frequency heating pipe 6 heats the temperature of the water close to the first temperature probe 31, the second variable frequency heating pipe 7 heats the water at the water outlet 12 to drinkable boiled water according to the second temperature probe 32, the third temperature probe 33 and the fourth temperature probe 34 can detect the temperature of the water flowing into the second water container 2 from the first water container 1, and when the temperature of the water at any side of the third temperature probe 33 or the fourth temperature probe 34 is lower than a set value, a switch of the first variable frequency heating pipe 6 is turned on and the water in the first water container 1 is heated.

As shown in fig. 3, the water level monitoring system 4 comprises a first water level probe 41 arranged in the first water tank 1 for monitoring whether the water level is higher than the first variable-frequency heating pipe 6, a second water level probe 42 arranged in the second water tank 2 for monitoring whether the water level is higher than the second variable-frequency heating pipe 7, and a third water level probe 43 and a fourth water level probe 44 arranged at the upper ends of the first water tank 1 and the second water tank 2 for monitoring whether the water tank is full of water; wherein, the first water level probe 41 is arranged above the first variable-frequency heating pipe 6, the second water level probe 42 is arranged above the second variable-frequency heating pipe 7, the first water level probe 41 and the second water level probe 42 are respectively electrically connected with the control switches of the first variable-frequency heating pipe 6 and the second variable-frequency heating pipe 7, and the third water level probe 43 and the fourth water level probe 44 are electrically connected with the water inlet electromagnetic valve 10. Whether the water level in the first water container 1 can be monitored by the first water level probe 41 exceeds the upper end of the first variable-frequency heating pipe 6, whether the water level in the second water container 2 exceeds the upper end of the second variable-frequency heating pipe 7 can be monitored by the second water level probe 42, the situation that the first variable-frequency heating pipe 6 or the second variable-frequency heating pipe 7 is dried is prevented from being damaged, whether the internal water level of the first water container 1 and the second water container 2 is monitored by the third water level probe 43 and the fourth water level probe 44 respectively reaches a full water state, the water inlet electromagnetic valve 10 can be controlled to close water inlet, and therefore the effect of automatically controlling the total water storage capacity is achieved.

Referring to fig. 4 and 5, the descaling structure 5 includes two descaling holes 51 respectively formed at the upper ends of the first and second bladders 1 and 2 for pouring descaling agent, a blocking member 52 screwed to the descaling holes 51 for opening and closing the descaling holes 51, a first drain pipe (not shown) formed at the bottom of the first bladder 1 for draining the sewage in the first bladder 1, and a second drain pipe 53 formed at the bottom of the second bladder 2 for draining the sewage in the second bladder 2; wherein, the first drain pipe is communicated with the second drain pipe 53, and a drain electromagnetic valve 54 for controlling the drain state is arranged at the communication position. The operator rotates out from scale removal hole 51 earlier plug 52, pour into first water container 1 and second water container 2 with the detergent that is usually used for clearing up the incrustation scale again, after a period of reaction time, open the control switch of drainage solenoid valve 54, the hydroenergy in first water container 1 and the second water container 2 can flow along first drain pipe and second drain pipe 53 respectively, pour into the clear water from each scale removal hole 51 again and wash, it can to close drainage solenoid valve 54 and screw plug 52 after the row is dry, thereby reach the effect of the incrustation scale in convenient clearance first water container 1 and the second water container 2.

In this embodiment, as shown in fig. 6, the outer walls of the first water container 1 and the second water container 2 are further provided with a casing 13 for enclosing the first water container 1 and the second water container 2, and a heat insulating layer 14 which is arranged between the casing 13 and the outer walls of the first water container 1 and the second water container 2 and is used for improving a heat insulating effect; specifically, the insulation layer 14 is made of a foam material.

The utility model discloses a working process and beneficial effect as follows:

when water supply is started, the water inlet electromagnetic valve 10 is controlled to be opened, raw water flows into the first water container 1 along the water inlet pipe 11, when the first water level detection probe 41 in the first water container 1 detects the water level, the first variable frequency heating pipe 6 starts to heat, at the moment, the output power of the first variable frequency heating pipe 6 gradually increases to 1500W of 1000-, when the temperature of the water in the second water container 2 reaches 95 ℃, the power of the second variable frequency heating pipe 7 is gradually reduced to 500W from 2500-.

When a user uses water, the fourth water level probe 44 detects that the water level in the second water container 2 does not reach the specified standard, the fourth water level probe 44 controls the water inlet electromagnetic valve 10 to be opened through an electric signal, raw water flows into the first water container 1 along the water inlet pipe 11, after a water column of the raw water vertically collides upwards against the lower surface of the shielding plate 91, the raw water can flow towards the inner side wall direction of the first water container 1 along the lower surface of the shielding plate 91 horizontally, the water inlet electromagnetic valve 10 is closed until the first water level probe 41 monitors the water, meanwhile, the first variable frequency heating pipe 6 is controlled to increase the power to 1500W, and when the first temperature probe 31 detects that newly supplemented raw water is heated to 85-95 ℃, the first variable frequency heating pipe 6 is controlled to return to 500W again to perform heat preservation work.

When the user uses too much water for one time, taking the first water container 1 with a capacity of 7L and the second water container 2 with a capacity of 25L as an example, when the second water container 2 is used for more than 6L once, the first water container 1 is supplemented with water of which the volume is not more than 6L (the rest 1L is used for preventing the first variable-frequency heating pipe 6 from being burnt), at the moment, the first water container 1 is supplemented with raw water until the first water container 1 is fully loaded again, at the moment, the water temperature in the first water container 1 can be controlled at 85 ℃, when the temperature is heated to 85 ℃, the first water container 1 can be replenished with raw water again, the upper layer water in the first water container 1 overflows into the second water container 2 to be mixed with the 95 ℃ hot water in the second water container 2, at the moment, the hot water in the second water container 2 can be cooled, however, when water is discharged, the temperature of the hot water cooled in the second water container 2 can be quickly raised to 95 ℃ by reheating the second variable-frequency heating pipe 7, and the cruising ability of the hot water can be improved by adopting the mode.

After there is some incrustations in first water container 1 and second water container 2, upwards unscrew scale removal hole 51 with two shutoff pieces 52, wait for reaction time after pouring suitable scale remover, open drainage solenoid valve 54 again, make water can follow first drain pipe and second drain pipe 53 outflow, wash first water container 1 and second water container 2 through the scale removal hole 51 that corresponds, wash the inside moisture of back row, again with shutoff piece 52 screw in corresponding scale removal hole 51 can, make the inside of frequency conversion water dispensers can be convenient for clear up fast.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a marching type frequency conversion water dispensers which characterized in that: including being provided with first water container (1) that is used for initial heating to the warm water, intercommunication first water container (1) in order to be used for storing second water container (2) of boiling water, set up in inlet tube (11) of first water container (1) bottom in order to be used for the supply raw water, set up in delivery port (12) of second water container (2) lower half in order to be used for the discharge boiling water and set up respectively in first water container (1) and second water container (2) in order to be used for first variable frequency heating pipe (6) and second variable frequency heating pipe (7) of heating, the upper end of first water container (1) is provided with overflow mouth (8) that are used for the warm water to flow in second water container (2), the interior bottom of first water container (1) is provided with into water end cap mechanism (9) that are used for guiding the water source level towards first inner bag lateral wall.

2. The step-by-step variable frequency water boiler according to claim 1, characterized in that: the water inlet plug mechanism (9) comprises a baffle plate (91) arranged at the bottom end inside the first water container (1) and used for shielding a water inlet column from ascending vertically and a plurality of supporting blocks (92) arranged on the lower surface of the baffle plate (91) and used for supporting the baffle plate (91), wherein the supporting blocks (92) are respectively positioned at two sides of one end of the first water container (1) extended into the water inlet pipe (11).

3. The step-by-step variable frequency water boiler according to claim 2, characterized in that: the water level detecting device is characterized in that a first water level probe (41) and a second water level probe (42) are respectively arranged in the first water container (1) and the second water container (2), the first water level probe (41) is close to and arranged above the first variable-frequency heating pipe (6), the second water level probe (42) is close to and arranged above the second variable-frequency heating pipe (7), and the first water level probe (41) and the second water level probe (42) are respectively and electrically connected with control switches of the first variable-frequency heating pipe (6) and the second variable-frequency heating pipe (7).

4. The step-by-step variable frequency water boiler according to claim 3, characterized in that: the water heating device is characterized in that a first temperature probe (31) is arranged in the first water container (1), the first temperature probe (31) is arranged between a first water level probe (41) and the first variable-frequency heating pipe (6), a water inlet electromagnetic valve (10) is arranged on the water inlet pipe (11), and the first temperature probe (31) is electrically connected with the water inlet electromagnetic valve (10).

5. The step-by-step variable frequency water boiler according to claim 4, characterized in that: a second temperature probe (32) is arranged in the second water container (2), the second temperature probe (32) is arranged at the position close to the water outlet (12), and the second temperature probe (32) is electrically connected with a control switch of the second variable-frequency heating pipe (7).

6. The step-by-step variable frequency water boiler according to claim 5, characterized in that: the first water container (1) is internally provided with a third temperature probe (33) at the position of the overflow port (8), the second water container (2) is internally provided with a fourth temperature probe (34) at the position of the overflow port (8), and the third temperature probe (33) and the fourth temperature probe (34) are both electrically connected with the first variable-frequency heating pipe (6).

7. The step-by-step variable frequency water boiler of claim 6, characterized in that: the upper ends of the first water container (1) and the second water container (2) are respectively provided with a third water level probe (43) and a fourth water level probe (44) which are used for monitoring a full water state, and the third water level probe (43) and the fourth water level probe (44) are respectively electrically connected with the water inlet electromagnetic valve (10).

8. The step-by-step variable frequency water boiler according to claim 7, characterized in that: the descaling device is characterized in that descaling holes (51) are formed in the upper ends of the first water container (1) and the second water container (2), and a blocking piece (52) is connected to the descaling holes (51) in a threaded mode.

9. The step-by-step variable frequency water boiler of claim 8, characterized in that: the bottom of first water courage (1) is provided with first drain pipe, the bottom of second water courage (2) is provided with second drain pipe (53), first drain pipe is linked together and the intercommunication department is provided with drainage solenoid valve (54) with second drain pipe (53).

10. The step-by-step variable frequency water boiler of claim 9, characterized in that: still be provided with shell (13) on the outer wall of first water courage (1) and second water courage (2), all be provided with between shell (13) and the outer wall of first water courage (1) and second water courage (2) heat preservation (14).

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