CN221055266U

CN221055266U - Power conversion and on-off control device of electric water heater and instant electric water heater

Info

Publication number: CN221055266U
Application number: CN202322661027.2U
Authority: CN
Inventors: 洪雪娇
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-09-28
Filing date: 2023-09-28
Publication date: 2024-05-31
Anticipated expiration: 2033-09-28

Abstract

The utility model discloses a power conversion and on-off control device of an electric water heater and an instant heating electric water heater, wherein the device comprises a water pressure driving mechanism, a power conversion and on-off control mechanism, the water pressure driving mechanism comprises a shell, a diaphragm, a driving piece and two touching pieces, the driving piece respectively drives the two touching pieces through two driving springs, and each touching piece is provided with a limiting part and a touching part; the control mechanism comprises a mounting seat, a switching rotating shaft, a signal micro switch and two power micro switches, wherein a plurality of driving convex strips extend outwards along the axial direction at one end of the switching rotating shaft, the switching rotating shaft is rotated to a set position, the water heater enters a shutdown state from a working state, the signal micro switch contacts act, a control panel of the electric water heater is delayed for a set time to close an electromagnetic gate valve power supply so as to close water inlet, and the driving convex strips press limit parts of two touching pieces when the water inlet state is delayed to be closed, so that the electric heating pipe does not work. The utility model has reliable action, high use safety and long service life.

Description

Power conversion and on-off control device of electric water heater and instant electric water heater

Technical Field

The utility model relates to the technical field of electric water heater manufacturing, in particular to an electric water heater power conversion and on-off control device and an instant heating type electric water heater.

Background

In the technical field of electric water heaters, due to different use scenes, the electric water heater needs to be controlled to be turned on or turned off, has a water pressure detection function, has a heating power conversion function and the like. In order to realize the functions, various control devices are needed, and if the control devices are independent, on one hand, the devices can increase the structural arrangement and assembly difficulty of the electric water heater; on the other hand, because the control devices are independent, the linkage effect is poor, control errors are easy to occur, and the working reliability and the operation convenience of the water heater are affected. In addition, some instant heating type electric water heaters have the advantages that the heating power is high, the capacity of the inner container is small, water is boiled again after water discharge is stopped, and the waste heat of the heating pipe of the electric water heater can heat the water in the inner container to a high temperature, so that people can be scalded when water discharge is restarted, and potential safety hazards are caused.

Therefore, aiming at the problem that the control devices are independent, people start to consider that the control devices are combined together, for example, a pressure detection and power conversion two-in-one switch of a water heater with a patent number of ZL200820101558.9 is disclosed in 1 month and 14 days of 2009, and the switch comprises a pressure detection device, a power turntable and a micro switch group; the pressure detection device is provided with a rubber diaphragm contacted with water of the detected water pressure and a pressure transmission piece contacted with the outer side surface of the rubber diaphragm, and the pressure transmission piece is provided with a transmission end; the micro switch group is provided with a contact, one surface of the power turntable is abutted with the transmission end of the pressure transmission piece, the other surface of the power turntable is abutted with the surface of the micro switch group provided with the contact, and the surface is provided with a concave part capable of accommodating the contact and a convex part capable of pressing down the contact; the power turntable is also provided with a driving piece for driving the power turntable to rotate. The utility model combines the pressure detection device and the power conversion device into a whole, which not only omits a micro switch and a connecting wire of the pressure detection device, reduces the failure rate, makes the installation more convenient, but also saves the space. However, the device cannot solve the problem that water discharged from restarting in the power conversion process scalds people; and the power turntable is required to realize relative movement with the pressure transmission piece and the micro-switch contact through rotary friction, so that the power turntable is easy to clamp, the service life is reduced, and the electric heating pipe is difficult to ensure to be not operated.

Disclosure of utility model

The technical problem to be solved by the utility model is to provide a power conversion and on-off control device of an electric water heater, which integrates the structure of power conversion and on-off, is convenient to install and operate, and improves the reliability of function switching; the problem that people are scalded due to the fact that the water outlet temperature is too high in restarting in the power conversion process can be prevented, the electric heating pipe of the electric water heater does not work in the shutdown gear, the use safety is improved, and the service life is prolonged.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: the power conversion and on-off control device of the electric water heater comprises a water pressure driving mechanism, a power conversion and on-off control mechanism, wherein the water pressure driving mechanism comprises a shell with an inner cavity and a diaphragm which is connected with the shell and divides the inner cavity of the shell, the inner cavity of the shell at one side of the diaphragm is communicated with a water inlet pipe of the electric water heater, a driving piece is arranged in the inner cavity of the shell at the other side of the diaphragm, one end of the driving piece is propped against the diaphragm, the other end of the driving piece respectively drives two touching pieces through two driving springs, a reset spring is further arranged between the driving piece and the shell, and one end of the reset spring is propped against the driving piece and the other end of the reset spring is propped against the shell;

The power conversion and on-off control mechanism comprises a mounting seat, a switching rotating shaft, a signal micro switch and two power micro switches, wherein the mounting seat is fixedly connected with the shell, the switching rotating shaft is pivoted on the mounting seat in a mode of circumferential rotation and axial immobility, the signal micro switch and the two power micro switches are respectively fixedly connected on the mounting seat, and each power micro switch is matched with a control panel of the electric water heater to control a group of electric heating pipes to work;

The two touching pieces are arranged on the shell and can shift along the axial direction of the switching rotating shaft, and each touching piece is provided with a limiting part and a touching part; the contacts of the two power microswitches respectively correspond to the touch part of one touch piece; one end of the switching rotating shaft is axially and outwards extended with a plurality of driving convex strips, after the water inlet pipe is filled with water and reaches a set water pressure, the water pressure driving diaphragm is deformed to drive the driving piece to shift to one side of the switching rotating shaft, the switching rotating shaft is rotated, and the driving convex strips on the switching rotating shaft can respectively touch the limiting parts of one touching piece or simultaneously touch the limiting parts of two touching pieces or are not contacted with the limiting parts of two touching pieces, so that the touching part of one touching piece touches one power micro switch contact or the touching parts of two touching pieces and the two power micro switch contacts are not touched or the touching parts of the two touching pieces respectively touch one power micro switch contact;

The switching rotating shaft is rotated to a set position, the water heater enters a shutdown state from a working state, the signal micro switch contacts act, the control panel of the electric water heater is used for closing the power supply of the electromagnetic gate valve after delaying the set time, then the electromagnetic gate valve is used for closing the water inlet of the water inlet pipe, and the switching rotating shaft presses the limiting parts of the two touching pieces by using the driving convex strips when the water inlet state is delayed to be closed, so that the touching parts of the two touching pieces cannot touch the two power micro switch contacts, and the electric heating pipe of the electric water heater does not work.

Further improvement, a section of abdication notch or a touching convex part is arranged in the middle of the switching rotating shaft, and the touching direction of the signal micro switch contact is vertical to the central axis of the switching rotating shaft; the rotating shaft is rotated to be switched to a set position, the water heater enters a shutdown state from a working state, and the yielding notch yields the signal micro switch contact or the touch convex part touches the signal micro switch contact to enable the signal micro switch contact to act. Thus, the whole structure is more compact and the action reliability is higher.

Preferably, three driving convex strips extending outwards along the axial direction are arranged at one end of the switching rotating shaft, namely a first driving convex strip, a second driving convex strip and a third driving convex strip, the first driving convex strip, the second driving convex strip and the third driving convex strip are all distributed in an arc shape, central axes corresponding to the first driving convex strip, the second driving convex strip and the third driving convex strip are overlapped, the first driving convex strip and the second driving convex strip are positioned on the same cylindrical surface, and the third driving convex strip is positioned on the other cylindrical surface; the first driving raised strips or the second driving raised strips are used for touching the limiting part of one touching piece, and the third driving raised strips are used for touching the limiting part of the other touching piece. The driving convex strips are convenient to touch or separate from the limiting parts of the touch piece, and the reliability of the action is improved.

Further improved, the touching directions of the two power micro switch contacts are parallel to the central axis of the switching rotating shaft, the touching piece comprises a body, a concave hole is formed in one end face of the body, the other end face of the body extends outwards to form the limiting part and the touching part, and the length of the touching part extending outwards from the other end face of the body is larger than that of the limiting part extending outwards from the other end face of the body;

One end of each driving spring is sleeved into one concave hole, two mounting holes are formed in the shell, the body of each touch piece is sleeved on one mounting hole, and the cross section of each mounting hole is matched with the cross section of the body so that the body cannot rotate relative to the mounting hole; the other end of the driving piece is provided with two positioning columns extending along the axial direction of the switching rotating shaft, and the other end of each driving spring is sleeved on one positioning column. Therefore, the connection of all parts is more reliable, the driving piece can drive the two touching pieces through the two driving springs more reliably, and meanwhile, the driving piece and the touching piece can be shifted and abducted relatively.

Further improved, the limiting part is a hemispherical body, the touching part is a cylinder, and the positioning column extends into one concave hole through the mounting hole. And inclined guide parts are arranged at two ends of each driving convex strip. To promote the reliability of the movement between the parts.

Further improved, the shell comprises an upper shell and a lower shell which are fixedly connected together, the diaphragm is clamped between the upper shell and the lower shell, a connecting pipe is arranged on the lower shell and is connected with a water inlet pipe of the electric water heater, two mounting holes are formed in the upper shell, and each mounting hole is communicated with an inner cavity of the shell. So as to facilitate assembly.

Further improved, the mounting seat is also pivoted with a driving shaft, a driving gear is fixedly arranged on the driving shaft, a driven gear is fixedly arranged on the switching rotating shaft, and the driving gear is meshed with the driven gear. Thus, the driving shaft is convenient to set, the driving shaft is convenient to be matched with an external power knob, and the overall aesthetic property is improved.

Further improved, the switching rotating shaft is radially provided with a plurality of positioning grooves, the mounting seat is provided with an elastic positioning piece, the positioning piece is provided with a positioning convex part, and after the switching rotating shaft rotates to switch a position in place, the positioning convex part on the positioning piece is matched with one of the positioning grooves. So as to improve the rotating hand feeling and be more convenient for gear switching.

According to the power conversion and switching control device of the electric water heater, the water pressure driving mechanism and the power conversion and switching control mechanism are fixedly connected into a whole through the shell and the mounting seat, and all relevant functional parts can interact with each other, so that the power conversion and switching functions are integrated in one control device, the installation is convenient, all the relevant functional parts are linked reliably, and the operation is convenient; meanwhile, the driving piece respectively drives the two touch pieces through the two driving springs, so that the touch pieces and the driving piece can be relatively abducted, soft connection and better abdication are realized, the driving piece and the touch pieces do not need to be rubbed relatively, the functional parts are prevented from being blocked mutually or the service life is reduced through hard contact friction, the reliability of the whole action is improved, the control is more reliable, and the service life is prolonged.

On the other hand, the switching rotating shaft is rotated to a set position, the water heater enters a shutdown state from a working state, the signal micro switch contacts act, the control panel of the electric water heater is used for closing the power supply of the electromagnetic gate valve after delaying the set time, then the electromagnetic gate valve is used for closing the water inlet of the water inlet pipe, and the switching rotating shaft is used for pressing the limiting parts of the two touching pieces by the driving convex strips when the water inlet state is delayed to be closed, so that the touching parts of the two touching pieces cannot touch the two power micro switch contacts, and the electric heating pipe of the electric water heater does not work. Therefore, the electric heating pipe can still keep water to be discharged to a set time after not working, so that the cold water takes away the residual heat of the electric heating pipe, the problem that people are scalded due to the fact that the water outlet temperature is too high when the electric heating pipe is restarted in the power conversion process can be effectively prevented, the electric heating pipe of the electric water heater is ensured to not work when the electric heating pipe is in a shutdown gear, and the use safety is improved.

The utility model also discloses a quick-heating type electric water heater which comprises an inner container, two groups of electric heating pipes, a water inlet pipe and a water outlet pipe, wherein the two groups of electric heating pipes are arranged on the inner container, the water inlet pipe is connected with a water inlet of the inner container, the water outlet pipe is connected with a water outlet of the inner container, the quick-heating type electric water heater further comprises the power conversion and on-off control device, an electromagnetic gate valve is arranged on the water inlet pipe, and the inner cavity of the shell at one side of the diaphragm is communicated with the water inlet pipe between the electromagnetic gate valve and the water inlet of the inner container.

The quick-heating electric water heater further comprises a rear seat and a face shell, wherein the liner is fixedly connected to the rear seat, the rear seat is fixedly connected with a left connecting terminal and a right connecting terminal, and a left water inlet branch pipe and a right water inlet branch pipe which are mutually communicated are further arranged on the water inlet pipe close to the water inlet end;

The water inlet pipe is also provided with a flow valve between the electromagnetic gate valve and the water inlet of the inner container, and the inner cavity of the shell at one side of the diaphragm is communicated with the water inlet pipe between the electromagnetic gate valve and the flow valve. So as to regulate the water inlet flow, and further regulate the water outlet temperature and the water outlet flow;

The power knob is connected with the power conversion and on-off control device to control the heating power and on-off of the electric heating pipe. To facilitate assembly and handling.

The instant heating type electric water heater uses the electric water heater power conversion and on-off control device, so that the instant heating type electric water heater has the advantages of compact overall structure, convenience in operation, reliability in control, use safety improvement and service life prolongation.

Drawings

FIG. 1 is a perspective view of a power conversion and on-off control device of the present utility model;

FIG. 2 is an exploded perspective view of FIG. 1;

FIG. 3 is a top view of the power conversion and on-off control device of the present utility model;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a perspective view of a touch member;

Fig. 6 is a perspective view of the switching shaft;

fig. 7 is a perspective view of the instant electric water heater of the present utility model;

fig. 8 is a perspective view of a hidden panel of the instant electric water heater of the present utility model;

FIG. 9 is a perspective view of the hidden face housing, rear seat, control board, power knob and flow knob of the instant electric water heater of the present utility model;

Fig. 10 is a schematic diagram of two touch piece limiting parts corresponding to three driving convex strips in different gear positions on the switching rotating shaft.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the detailed description.

Fig. 1 to 6 and 8 show a power conversion and on-off control device of an electric water heater, which comprises a hydraulic driving mechanism 100 and a power conversion and on-off control mechanism 200.

The hydraulic driving mechanism 100 comprises a shell 1 with an inner cavity and a diaphragm 2 connected with the shell 1 and dividing the inner cavity of the shell 1, wherein the diaphragm 2 can be a rubber diaphragm, the shell 1 comprises an upper shell 11 and a lower shell 12 which are fixedly connected together, the diaphragm 2 is clamped between the upper shell 11 and the lower shell 12, a connecting pipe 13 is arranged on the lower shell 12, the connecting pipe 13 is connected with a water inlet pipe 30 of an electric water heater, namely, the inner cavity 14 of the shell 1 at one side of the diaphragm 2 is communicated with the water inlet pipe 30 of the electric water heater; the inner cavity 15 of the shell 1 at the other side of the diaphragm 2 is provided with a driving piece 3, one end of the driving piece 3 is propped against the diaphragm 2, the other end of the driving piece 4 is used for respectively driving two touching pieces 5, a reset spring 6 is further arranged between the driving piece 3 and the upper shell 11 of the shell 1, one end of the reset spring 6 is propped against the driving piece 3, the other end of the reset spring is propped against the upper shell 11 of the shell 1, and each touching piece 5 is provided with a limiting part 51 and a touching part 52. The lower case 12 is provided therein with a plurality of supporting protrusions 121, and the plurality of supporting protrusions 121 are used to support the diaphragm 2, preventing the diaphragm 2 from being damaged by excessive deformation.

Referring further to fig. 5, the touching member 5 includes a body 53, a concave hole 54 is formed on one end surface of the body 53, and a limiting portion 51 and a touching portion 52 extend outwards from the other end surface of the body 53, and the length of the touching portion 52 extending outwards from the other end surface of the body 53 is greater than the length of the limiting portion 51 extending outwards from the other end surface of the body 53; the edge of the cross section of the body 53 comprises a circle, the circle is connected with one ends of two parallel lines in the radial direction, the other ends of the two parallel lines are connected with two ends of an arc, the limiting part 51 is a hemisphere, and the touching part 52 is a cylinder.

The power conversion and on-off control mechanism 200 comprises a mounting seat 1a, a switching rotating shaft 2a, an on-off signal micro switch 3a and two power micro switches 4a, wherein the mounting seat 1a is fixedly connected with the shell 1, specifically, the mounting seat 1a is fixedly connected with an upper shell 11 of the shell 1 through screws; the switching rotating shaft 2a is pivoted on the mounting seat 1a in a mode of circumferential rotation and axial immobility, the signal micro switch 3a and the two power micro switches 4a are respectively and fixedly connected on the mounting seat 1a, the touching direction of the contacts of the two power micro switches 4a is parallel to the central axis of the switching rotating shaft 2a, the touching direction of the contacts of the signal micro switch 3a is perpendicular to the central axis of the switching rotating shaft 2a, and each power micro switch 4a is matched with the electric water heater control board 601 to control a group of electric heating pipes 20 to work.

The two touching pieces 5 are arranged on the shell 1 and can move along the axial direction of the switching rotating shaft 2a, specifically, two mounting holes 111 are formed in the upper shell 11 of the shell 1, each mounting hole 111 is communicated with the inner cavity 15 of the shell 1, the body 53 of each touching piece 5 is sleeved on one mounting hole 111, and the cross section of the mounting hole 111 is matched with the cross section of the body 53 so that the body 53 cannot rotate relative to the mounting hole 111; one end of each driving spring 4 is sleeved into one concave hole 54, two positioning columns 31 extending along the axial direction of the switching rotating shaft 2a are arranged at the other end of the driving piece 3, the other end of each driving spring 4 is sleeved on one positioning column 31, the positioning columns 31 extend into one concave hole 54 through the mounting holes 111, and the contacts of the two power microswitches 4a correspond to the touch parts 52 of one touch piece 5 respectively.

Three driving convex strips are extended outwards along the axial direction at one end of the switching rotating shaft 2a, namely a first driving convex strip 21a, a second driving convex strip 22a and a third driving convex strip 23a, the first driving convex strip 21a, the second driving convex strip 22a and the third driving convex strip 23a are all distributed in an arc shape, central axes corresponding to the first driving convex strip 21a, the second driving convex strip 22a and the third driving convex strip 23a are overlapped, the first driving convex strip 21a and the second driving convex strip 22a are positioned on the same cylindrical surface, and the third driving convex strip 23a is positioned on the other cylindrical surface; the first driving protrusion 21a or the second driving protrusion 22a is used for touching the limit part 51 of one touching piece 5, and the third driving protrusion 23a is used for touching the limit part 51 of the other touching piece 5. The two ends of the first driving raised strip 21a are respectively provided with an inclined guiding part 211a, the two ends of the second driving raised strip 22a are respectively provided with an inclined guiding part 221a, and the two ends of the third driving raised strip 23a are respectively provided with an inclined guiding part 231a so as to be matched and contacted with the limiting part 51 of the touching piece 5 in the rotating process.

After the water inlet pipe 30 of the water heater enters water and reaches a set water pressure, the water pressure drives the diaphragm 2 to deform so as to drive the driving piece 3 to shift to one side of the switching rotating shaft 2a, and the switching rotating shaft 2a is rotated, so that a plurality of driving convex strips, namely a first driving convex strip 21a, a second driving convex strip 22a and a third driving convex strip 23a, can respectively touch the limiting parts 51 of one touch piece 5 or simultaneously touch the limiting parts 51 of two touch pieces 5 or are not contacted with the limiting parts 51 of the two touch pieces 5, and the touch part 52 of one touch piece 5 touches one of the power micro-switch 4a contacts or the touch part 52 of the two touch pieces 5 and the two power micro-switch 4a contacts are not touched or the touch parts 52 of the two touch pieces 5 respectively touch one power micro-switch 4a contact; thus, the heating power of the electric water heater can be adjusted by whether the contacts of the two power micro switches 4a are touched.

The rotating shaft 2a is rotated to be switched to a set position, the water heater enters a shutdown state from a working state, the signal micro switch contact 3a acts, the control board 601 of the electric water heater turns off the power supply of the electromagnetic gate valve 60 after delaying the set time, then the electromagnetic gate valve 60 turns off the water inlet of the water inlet pipe 30, and the switching shaft 2a presses the limit parts 51 of the two touching pieces 5 by utilizing the two driving convex strips when the water inlet state is delayed to be closed, so that the touching parts 52 of the two touching pieces 5 cannot touch the contacts of the two power micro switches 4a, and the electric heating pipe 20 of the electric water heater does not work.

The rotating shaft 2a is rotated to a set position, the water heater enters a power-off state from a working state, and the specific structure of the action of the signal micro switch contact 3a is as follows: a section of abdication gap 24a is arranged in the middle of the switching rotating shaft 2a, and the touch direction of the contact of the signal micro switch 3a is vertical to the central axis of the switching rotating shaft 2 a; the switching rotating shaft 2a is rotated to a set position, the water heater enters a shutdown state from a working state, and the yielding notch 24a yields the contact of the signal micro switch 3a so that the contact of the signal micro switch 3a acts.

When the signal micro switch 3a is a normally closed switch, the relief notch 24a in the middle of the switching shaft 2a may be designed to touch the protruding portion, and then the contact of the signal micro switch 3a is touched by the touching protruding portion to make the signal micro switch 3a act.

Five positioning grooves 25a are formed in the switching rotating shaft 2a in the radial direction, an elastic positioning piece 5a is arranged on the mounting seat 1a, a positioning convex part 51a is arranged on the positioning piece 5a, and after the switching rotating shaft 2a rotates to switch one gear position in place, the positioning convex part 51a on the positioning piece 5a is matched with one of the positioning grooves 25 a. So as to improve the rotating switching hand feeling and ensure the reliability of power switching.

The mounting seat 1a is also pivoted with a driving shaft 6a, a driving gear 61a is fixedly arranged on the driving shaft 6a, a driven gear 26a is fixedly arranged on the switching rotating shaft 2a, and the driving gear 61a is meshed with the driven gear 26 a. Thus, the electric water heater is convenient to be matched with a shell of the electric water heater, the structure and the knob are convenient to set, and the attractiveness is improved.

When the power conversion and on-off control device is used, the driving gear 61a drives the driven gear 26a and the switching rotating shaft 2a to rotate by rotating the driving shaft 6a, so that gear switching is performed.

Referring to fig. 1 to 9, a quick-heating electric water heater includes a liner 10, two groups of electric heating pipes 20, a water inlet pipe 30, a water outlet pipe 40, and a power conversion and on-off control device 50 described in the foregoing embodiments, where the two groups of electric heating pipes 20 are installed on the liner 10, the heating powers of the two groups of electric heating pipes 20 are different, the water inlet pipe 30 is connected with a water inlet of the liner 10, the water outlet pipe 40 is connected with a water outlet of the liner 10, an electromagnetic gate valve 60 is provided on the water inlet pipe 30, a flow valve 70 is further provided between the electromagnetic gate valve 60 and the water inlet of the liner 10, and an inner cavity of the casing 1 at one side of the diaphragm 2 is communicated with the water inlet pipe 30 between the electromagnetic gate valve 60 and the flow valve 70, that is, i.e. a connecting pipe 13 on the lower casing 12 is connected with the water inlet pipe 30 between the electromagnetic gate valve 60 and the flow valve 70; the control board 601 closes the water inlet of the water inlet pipe 30 by the solenoid gate valve 60 after delaying the set time.

The instant heating type electric water heater of the embodiment further comprises a rear seat 80 and a face shell 90, wherein the liner 10 is fixedly connected to the rear seat 80, and the rear seat 80 is fixedly connected with a left connecting terminal 801 and a right connecting terminal 802, so that the left side and the right side can be connected with an external power supply, and the electric water heater is convenient to install; the water inlet pipe 30 is also provided with a left water inlet branch pipe 301 and a right water inlet branch pipe 302 which are communicated with each other near the water inlet end; therefore, the external water inlet pipe can be connected in the left side, the right side and the lower side, the installation convenience is further improved, and the port which is not connected with the water inlet end can be plugged by the plug head.

The control board 601 is arranged between the face shell 90 and the liner 10; the face shell 90 is also provided with a power knob 901 and a flow knob 902, the flow knob 902 is fixedly connected with the rotating shaft of the flow valve 70 to control the water inflow of the liner 10, and the water outflow temperature can be adjusted by controlling the water inflow; the power knob 901 is fixedly connected with a driving shaft 6a of the power conversion and on-off control device 50, and the switching rotating shaft 2a is rotated by the driving shaft 6a to control the heating power and on-off of the electric heating pipe.

The control process of the instant heating type electric water heater is as follows: referring further to fig. 10, in the off state, that is, in the O gear, the positioning protrusion 51a on the positioning member 5a is matched with one of the positioning grooves 25a on the switching shaft 2a, the contact of the signal micro switch 3a is in the yielding position through the yielding gap 24a in the middle of the switching shaft 2a, the contact is disconnected and inactive, the control board 601 of the electric water heater disconnects the power supply of the electromagnetic gate valve 60, the electromagnetic gate valve 60 closes the water inlet pipe 30, and the flow knob 902 can be in the set position.

Then, the power knob 901 rotates the driving shaft 6a, the driving shaft 6a is meshed with the driven gear 26a through the driving gear 61a to rotate the switching rotating shaft 2a, the switching rotating shaft 2a rotates 72 degrees along the marking direction of fig. 10, so that the positioning convex part 51a on the positioning piece 5a is matched with the other positioning groove 25a on the switching rotating shaft 2a, and I-gear heating is performed, at this time, the switching rotating shaft 2a touches the contact point of the signal micro switch 3a, the signal micro switch 3a is conducted, then the power supply of the electromagnetic gate valve 60 is switched on through the control panel 601, the water inlet pipe 30 enters the inner container 10, after the water inlet pipe 30 reaches the set water pressure, the diaphragm 2 is driven to deform through the connecting pipe 13 water pressure to drive the driving piece 3 to shift to the side of the switching rotating shaft 2a, the other end of the driving piece 3 drives the two touching pieces 5 to move to the side of the switching rotating shaft 2a through the two driving springs 4 respectively, the third driving convex strip 23a touches and presses the limit part 51 of one touching piece 5, the touching part 52 of the corresponding one power micro switch 4a contact point, the power micro switch 4a does not act, and a group of electric heating pipes 20 does not work; the first driving protruding strip 21a and the third driving protruding strip 23a are not contacted with the limiting part 51 of the other touch piece 5, and the touch part 52 of the other touch piece 5 can touch one of the contacts of the power micro switch 4a so that the other group of electric heating pipes 20 can work and heat; the first heating power heating is achieved.

Then, the power knob 901 is rotated again, the switching rotating shaft 2a rotates 72 ° along the identification direction of fig. 10, the positioning convex part 51a on the positioning piece 5a is matched with the other positioning groove 25a on the switching rotating shaft 2a, and the II-gear heating is performed, at this time, the switching rotating shaft 2a keeps the contact point of the touch signal micro switch 3a, the electromagnetic gate valve 60 is continuously connected through the control board 601, the water inlet pipe 30 enters the inner container 10, after the water inlet pipe 30 reaches the set water pressure, the diaphragm 2 is driven to deform by the water pressure of the connecting pipe 13 to drive the driving piece 3 to shift to the side of the switching rotating shaft 2a, the other end of the driving piece 3 drives the two touch pieces 5 to move to the side of the switching rotating shaft 2a through the two driving springs 4 respectively, the first driving convex strip 21a touches the limiting part 51 for pressing one touch piece 5, the touch part 52 of the touch piece 5 cannot touch the corresponding power micro switch 4a contact point, the power micro switch 4a is not turned off, and the electric heating pipe 20 is turned off; the second driving protruding strip 22a and the third driving protruding strip 23a are not contacted with the limiting part 51 of the other touching piece 5, the touching part 52 of the other touching piece 5 can touch the contact of the other power micro switch 4a to heat the other group of electric heating pipes 20 in a working mode, and when in I-grade heating, one group of electric heating pipes 20 is disconnected and not in working mode, so that the second heating power heating is realized.

Then, the power knob 901 is rotated again, the switching shaft 2a rotates 72 ° along the marking direction of fig. 10, the positioning convex part 51a on the positioning piece 5a is matched with the other positioning groove 25a on the switching shaft 2a, and the iii-gear heating is performed, at this time, the switching shaft 2a keeps touching the contact point of the signal micro switch 3a, the electromagnetic gate valve 60 is continuously connected through the control board 601, the water inlet pipe 30 enters the inner container 10, after the water inlet pipe 30 reaches the set water pressure, the diaphragm 2 is driven to deform by the water pressure of the connecting pipe 13 to drive the driving piece 3 to shift to the side of the switching shaft 2a, the other end of the driving piece 3 drives the two touching pieces 5 to move to the side of the switching shaft 2a through the two driving springs 4 respectively, the first driving convex strip 21a, the second driving convex strip 22a and the third driving convex strip 23a are not contacted with the limiting parts 51 of the two touching pieces 5, the touching parts 52 of the two touching pieces 5 can respectively touch the contact points of the power micro switch 4a, the two groups of electric heating pipes 20 work and heat at this time, and the third heating power heating is realized.

Then, the power knob 901 is rotated again, the switching rotating shaft 2a is rotated for 72 degrees again along the identification direction of fig. 10, and the positioning convex part 51a on the positioning piece 5a is matched with the other positioning groove 25a on the switching rotating shaft 2a to enter into IV gear operation; at this time, the switching shaft 2a keeps the contact point of the touch signal micro switch 3a, the electromagnetic gate valve 60 is continuously connected through the control board 601, the water inlet pipe 30 enters the inner container 10, after the water inlet pipe 30 reaches the set water pressure, the diaphragm 2 is driven to deform by the water pressure of the connecting pipe 13 to drive the driving piece 3 to shift to the side of the switching shaft 2a, the other end of the driving piece 3 drives the two touch pieces 5 to shift to the side of the switching shaft 2a through the two driving springs 4 respectively, the second driving convex strip 22a and the third driving convex strip 23a respectively press the limit parts 51 of the two touch pieces 5, the touch parts 52 of the two touch pieces 5 cannot touch the contact point of the power micro switch 4a, the electric heating pipe 20 does not work, heating is stopped, and cold water is discharged.

Then, the power knob 901 is rotated again, the switching shaft 2a is rotated again by 72 ° along the identification direction of fig. 10, the positioning protrusion 51a on the positioning piece 5a is matched with the other positioning groove 25a on the switching shaft 2a, the signal microswitch 3a contacts return to the O gear position through the yielding action of the yielding notch 24a in the middle of the switching shaft 2a, the control board 601 turns off the power supply of the electromagnetic gate valve 60 after delaying the set time, and the electromagnetic gate valve 60 turns off the water inlet of the water inlet pipe 30 after the delayed set time is reached. Meanwhile, the second driving raised line 22a and the third driving raised line 23a respectively press the limiting parts 51 of the two touching pieces 5, and the touching parts 52 of the two touching pieces 5 cannot touch the contact points of the power micro switch 4a, so that the two groups of electric heating pipes 20 are ensured not to work.

In this embodiment, when the control board 601 rotates from any gear to the shutdown gear rapidly, the power of the electromagnetic gate valve 60 is turned off after the set time is delayed, the water inlet of the water inlet pipe 30 is turned off, and the second driving convex strip 22a and the third driving convex strip 23a respectively press the limiting portions 51 of the two touching pieces 5 when the water inlet state is delayed to be turned off, so that the touching portions 52 of the two touching pieces 5 cannot touch the contacts of the power micro switch 4a, and the two groups of electric heating pipes 20 are ensured to be not operated. The water outlet scalding caused by the over high temperature of the water in the inner container during restarting the water outlet is prevented, and the use safety is improved. The flow rate and the temperature of the water outlet can be adjusted by rotating the flow knob 902 when the water outlet flow rate and the temperature of the water outlet are required to be adjusted.

In this embodiment, except for the O gear in the off state, the yielding notch 24a in the middle of the switching shaft 2a yields the contact of the signal micro switch 3a, so that the contact of the signal micro switch 3a is reset to be disconnected, and in other gears, the switching shaft 2a presses the contact of the signal micro switch 3a, so that the signal micro switch 3a is connected.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides an electric water heater power conversion and on-off control device which characterized in that: the hydraulic driving mechanism comprises a shell with an inner cavity and a diaphragm which is connected with the shell and divides the inner cavity of the shell, the inner cavity of the shell at one side of the diaphragm is communicated with a water inlet pipe of an electric water heater, a driving piece is arranged in the inner cavity of the shell at the other side of the diaphragm, one end of the driving piece is propped against the diaphragm, the other end of the driving piece respectively drives two touching pieces through two driving springs, a reset spring is further arranged between the driving piece and the shell, one end of the reset spring is propped against the driving piece, and the other end of the reset spring is propped against the shell;

2. The electric water heater power conversion and on-off control device according to claim 1, wherein: a section of abdication notch or a touching convex part is arranged in the middle of the switching rotating shaft, and the touching direction of the signal micro switch contact is vertical to the central axis of the switching rotating shaft; the rotating shaft is rotated to be switched to a set position, the water heater enters a shutdown state from a working state, and the yielding notch yields the signal micro switch contact or the touch convex part touches the signal micro switch contact to enable the signal micro switch contact to act.

3. The electric water heater power conversion and on-off control device according to claim 1, wherein: three driving convex strips extending outwards along the axial direction are arranged at one end of the switching rotating shaft, namely a first driving convex strip, a second driving convex strip and a third driving convex strip, wherein the first driving convex strip, the second driving convex strip and the third driving convex strip are distributed in an arc shape, central axes corresponding to the first driving convex strip, the second driving convex strip and the third driving convex strip are overlapped, the first driving convex strip and the second driving convex strip are positioned on the same cylindrical surface, and the third driving convex strip is positioned on the other cylindrical surface; the first driving raised strips or the second driving raised strips are used for touching the limiting part of one touching piece, and the third driving raised strips are used for touching the limiting part of the other touching piece.

4. The electric water heater power conversion and on-off control device according to claim 1, wherein: the touch direction of the two power micro switch contacts is parallel to the central axis of the switching rotating shaft, the touch piece comprises a body, a concave hole is formed in one end face of the body, the other end face of the body extends outwards to form a limiting part and a touch part, and the length of the touch part extending outwards from the other end face of the body is larger than that of the limiting part extending outwards from the other end face of the body;

One end of each driving spring is sleeved into one concave hole, two mounting holes are formed in the shell, the body of each touch piece is sleeved on one mounting hole, and the cross section of each mounting hole is matched with the cross section of the body so that the body cannot rotate relative to the mounting hole; the other end of the driving piece is provided with two positioning columns extending along the axial direction of the switching rotating shaft, and the other end of each driving spring is sleeved on one positioning column.

5. The electric water heater power conversion and on-off control device according to claim 4, wherein: the limiting part is a hemispherical body, the touching part is a cylinder, and the positioning column stretches into one concave hole through the mounting hole.

6. The electric water heater power conversion and on-off control device according to claim 4, wherein: the shell comprises an upper shell and a lower shell which are fixedly connected together, the diaphragm is clamped between the upper shell and the lower shell, a connecting pipe is arranged on the lower shell and connected with a water inlet pipe of the electric water heater, two mounting holes are formed in the upper shell, and each mounting hole is communicated with an inner cavity of the shell.

7. The electric water heater power conversion and on-off control device according to claim 1, wherein: the mounting seat is also pivoted with a driving shaft, a driving gear is fixedly arranged on the driving shaft, a driven gear is fixedly arranged on the switching rotating shaft, and the driving gear is meshed with the driven gear.

8. The electric water heater power conversion and on-off control device according to claim 1, wherein: the switching rotating shaft is radially provided with a plurality of positioning grooves, the mounting seat is provided with an elastic positioning piece, the positioning piece is provided with a positioning convex part, and after the switching rotating shaft rotates to switch a position in place, the positioning convex part on the positioning piece is matched with one of the positioning grooves.

9. The utility model provides a quick heating type electric water heater, includes inner bag, two sets of electric heating pipes, inlet tube and outlet pipe, and two sets of electric heating pipes are installed on the inner bag, and the inner bag water inlet is connected to the inlet tube, and the outlet pipe is connected to the inner bag delivery port, its characterized in that: the power conversion and on-off control device further comprises a power conversion and on-off control device according to any one of the claims 1-8, wherein the electromagnetic gate valve is arranged on the water inlet pipe, and the inner cavity of the shell at one side of the diaphragm is communicated with the water inlet pipe between the electromagnetic gate valve and the water inlet of the inner container.

10. The instant heating electric water heater of claim 9, wherein: the water inlet pipe is provided with a left water inlet branch pipe and a right water inlet branch pipe which are communicated with each other near the water inlet end;

The water inlet pipe is further provided with a flow valve between the electromagnetic gate valve and the water inlet of the inner container, and the inner cavity of the shell at one side of the diaphragm is communicated with the water inlet pipe between the electromagnetic gate valve and the flow valve;

The power knob is connected with the power conversion and on-off control device to control the heating power and on-off of the electric heating pipe.