CN220286580U

CN220286580U - On-off control device and electric heating faucet

Info

Publication number: CN220286580U
Application number: CN202321583300.8U
Authority: CN
Inventors: 王方超; 赵清占
Original assignee: Ningbo Happy Electric Appliance Industry And Trade Co ltd
Current assignee: Ningbo Happy Electric Appliance Industry And Trade Co ltd
Priority date: 2023-06-20
Filing date: 2023-06-20
Publication date: 2024-01-02
Anticipated expiration: 2033-06-20

Abstract

The utility model provides an on-off control device, which belongs to the technical field of control valves and comprises a main body, wherein a water inlet hole communicated with a water inlet channel, a water outlet hole communicated with a water outlet channel and a water outlet hole communicated with the water outlet hole are arranged on the main body, an on-off control cavity is arranged in the main body, an on-off control element is arranged in the on-off control cavity, a through hole communicated with the water outlet hole is formed in the on-off control element, and the on-off control element moves in the on-off control cavity to control the on-off and the on-off of the water inlet hole and the water outlet hole. The utility model can control the on-off of the whole on-off control device by the movement of the on-off control element through the through hole communicated with the drain hole, and has the advantages of simple structure, accurate control, quick response and strong practicability.

Description

On-off control device and electric heating faucet

Technical Field

The utility model belongs to the technical field of control valves, and particularly relates to an on-off control device and an electric heating faucet.

Background

The on-off control device is an automatic basic element for controlling fluid, belongs to an actuator, and is not limited to hydraulic pressure and pneumatic pressure. For use in industrial control systems to adjust the direction, flow, velocity and other parameters of the medium. The method can be matched with different circuits to realize expected control, and has high control precision and strong flexibility.

The existing control device is complex in structure and low in control precision, so that the device is urgently needed to be provided with the on-off control device with simple structure, accurate control and quick response and the electric heating faucet provided with the on-off control device.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides the on-off control device and the electric heating faucet, which have the advantages of simple structure, accurate control and quick response.

The technical scheme adopted by the utility model for solving the technical problems is that the on-off control device is provided, wherein two ends of the on-off control device are respectively connected with a water inlet channel and a water outlet channel, the on-off control device comprises a main body, a water inlet hole communicated with the water inlet channel, a water outlet hole communicated with the water outlet channel and a water outlet hole communicated with the water outlet hole are arranged on the main body, an on-off control cavity is arranged in the main body, an on-off control element is arranged in the on-off control cavity, a through hole communicated with the water outlet hole is formed in the on-off control element, and the on-off control element moves in the on-off control cavity to control the on-off and off of the water inlet hole and the water outlet hole.

In the on-off control device, the on-off control element divides the on-off control cavity to form a first cavity and a second cavity, the water inlet is respectively communicated with the first cavity and the second cavity, and the on-off control element moves between a first position and a second position of the on-off control cavity to control the connection and the disconnection of the water inlet and the water drain.

In the on-off control device, the on-off control element comprises a first side surface positioned in the first cavity and a second side surface positioned in the second cavity, and the on-off control element is controlled to move between a first position and a second position of the on-off control cavity by changing the pressure difference between the first side surface and the second side surface.

In the above-mentioned on-off control device, one side of the on-off control element is connected with a first elastic member, the first elastic member is disposed in the second cavity, and the on-off control element is controlled to move between a first position and a second position of the on-off control cavity by stretching and compressing the first elastic member.

In the above-mentioned on-off control device, be provided with the solenoid valve in the main part, the solenoid valve includes first case, first case with the through-hole sets up relatively, through the power on-off control of solenoid valve first case butt or keep away from the through-hole, and then change the pressure differential between first cavity with the second cavity, control the water inlet with the closure and the switch on of apopore.

In the on-off control device, a water sealing end is arranged on one side, close to the through hole, of the first valve core, a second elastic piece is connected to the other side of the first valve core, the first valve core is controlled to compress the second elastic piece through the electrification of the electromagnetic valve, and then the water sealing end is controlled to be far away from the through hole.

In the above-mentioned on-off control device, the on-off control element is provided with a via hole, a thimble is disposed in the via hole, and in the same horizontal plane, a projection plane of a maximum profile of the thimble disposed in the via hole is located in a projection plane of a minimum profile of the via hole.

In the on-off control device, in the same horizontal plane, the difference between the cross sectional areas of the through hole and the thimble is less than or equal to 0.5mm ² 。

In the above-mentioned on-off control device, the adjusting member includes an open portion and a closed portion that are disposed at intervals, and the first water inlet hole is controlled to be communicated with the open portion by the knob, or the second water inlet hole is controlled to be communicated with the open portion.

The utility model also provides an electric heating faucet, which comprises a control cavity and a heating cavity, wherein the on-off control device is arranged in the control cavity, and a heating pipe is arranged in the heating cavity.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the on-off control device provided by the utility model, the through hole communicated with the drain hole is formed in the on-off control element, so that the on-off and off of the whole on-off control device can be controlled through the movement of the on-off control element, and the on-off control device is simple in structure, accurate in control, quick in response and high in practicability;

2. by arranging the first elastic piece and the electromagnetic valve, the on-off control element can accurately control the on-off and off of the water inlet and the water outlet according to the on-off state of the electromagnetic valve, and can be quickly reset, so that the control is flexible and the reliability is high;

3. by arranging the first valve core, and arranging the water sealing ends and the second elastic pieces on two sides of the first valve core, the first valve core can rapidly respond and move under the on-off state, the opening and closing of the drain hole are controlled, and then the pressure difference between the first cavity and the second cavity is changed, so that the rapid water outlet and water closing of the faucet are realized, the control is accurate and efficient, the reliability is high, and the practicability is strong;

4. the on-off is provided with a through hole on the control element, the diameter of the through hole is smaller than that of the drain hole, the pressure in the second cavity is reduced to the greatest extent, so that the low-power electromagnetic valve can overcome the water pressure of tap water, and the water outlet and the closing of the faucet are controlled;

5. through setting up interval distribution's open portion and closure portion to and the first apopore and the second apopore of adjacent setting, make rotatory knob can control electric tap and be in the response mode or the non-response mode, through-hole and the closure plate that the interval set up make electric tap switch between two modes nimble, it is convenient to adjust, and the reliability is high.

Drawings

FIG. 1 is a schematic cross-sectional view of an overall structure according to a first embodiment of the present utility model.

Fig. 2 is an enlarged schematic diagram A1 of the solenoid valve according to the first embodiment of the present utility model.

Fig. 3 is an enlarged schematic diagram A2 of the structure of the solenoid valve in the first embodiment of the utility model.

Fig. 4 is a schematic structural diagram of a second valve core according to a first embodiment of the present utility model.

Fig. 5 is a schematic structural view of an adjusting member according to a first embodiment of the present utility model.

Fig. 6 is a schematic diagram of an electrothermal faucet according to a second embodiment of the present utility model.

In the figure, 100, an on-off control device; 110. a water inlet channel; 120. a water outlet channel; 130. a knob; 200. a main body; 210. a water inlet hole; 211. a first water inlet hole; 212. a second water inlet hole; 220. a water outlet hole; 230. a drain hole; 300. an on-off control cavity; 310. a first cavity; 320. a second cavity; 400. an on-off control element; 410. a through hole; 420. a first side; 430. a second side; 440. a first elastic member; 450. a via hole; 451. a thimble; 500. an electromagnetic valve; 510. a first valve core; 511. a water sealing end; 512. a second elastic member; 600. a second valve core; 610. an adjusting member; 611. an opening portion; 612. a closing part; 700. an electric heating faucet; 710. a control chamber; 720. and a heating chamber.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Example 1

As shown in fig. 1 to 5, the present utility model provides an on-off control device 100, two ends of which are respectively connected with a water inlet channel 110 and a water outlet channel 120, the main body 200 is provided with a water inlet hole 210 communicated with the water inlet channel 110, a water outlet hole 220 communicated with the water outlet channel 120, and a water outlet hole 230 communicated with the water outlet hole 220, wherein an on-off control cavity 300 is provided in the main body 200, an on-off control element 400 is provided in the on-off control cavity 300, a through hole 410 communicated with the water outlet hole 230 is provided on the on-off control element 400, and the on-off control element 400 moves in the on-off control cavity 300 to control on-off of the water inlet hole 210 and the water outlet hole 220.

The on-off control element 400 divides the on-off control cavity 300 to form a first cavity 310 and a second cavity 320, the water inlet 210 is respectively communicated with the first cavity 310 and the second cavity 320, and the on-off control element 400 moves between a first position and a second position of the on-off control cavity 300 to control the connection and the disconnection of the water inlet 210 and the water outlet 230.

The utility model provides an on-off control device 100 for controlling the on-off of fluid, such as water flow in an electric faucet, wherein two ends of the on-off control device 100 are respectively connected with a water inlet channel 110 and a water outlet channel 120, water flows into a water inlet hole 210 through the water inlet channel 110 and then flows out to the water outlet channel 120 through a water outlet hole 220 to be discharged, in the embodiment, an on-off control element 400 is arranged in a main body 200, a first cavity 310 and a second cavity 320 are respectively formed at two sides of the on-off control element 400, a through hole 410 communicated with a water outlet hole 230 is arranged on the on-off control element 400, and the on-off of the water inlet hole 210 and the water outlet hole 230 is controlled by the movement of the on-off control element 400 in the on-off control cavity 300, so as to further control the on-off of the water inlet hole 210 and the water outlet hole 220. Through set up the through-hole 410 that is linked together with wash port 230 on the break-make control element 400 for can control the switch-on and the switch-off of whole break-make control device 100 through the removal of break-make control element 400, simple structure, control is accurate, and the reaction is quick, and the practicality is strong.

As shown in fig. 1 to 5, the on-off control member 400 includes a first side 420 located in the first cavity 310 and a second side 430 located in the second cavity 320, and the on-off control member 400 is controlled to move between a first position and a second position of the on-off control cavity 300 by varying a pressure difference between the first side 420 and the second side 430.

When the on-off control element 400 is in the first position of the on-off control cavity 300, the pressure applied to the first side 420 is smaller than the pressure applied to the second side 430, and the water inlet 210 and the water outlet 220 are closed; when the on-off control element 400 is in the second position of the on-off control cavity 300, the pressure applied to the first side 420 is greater than the pressure applied to the second side 430, and the water inlet 210 is in communication with the water outlet 220.

In this embodiment, the on-off control element 400 may move between a first position and a second position of the on-off control cavity 300, specifically, when the on-off control device 100 is in a closed state, the on-off control element 400 is in the first position of the on-off control cavity 300, as shown in fig. 2, at this time, the pressure in the first cavity 310 is the water inlet pressure, the pressure in the first side 420 is the water inlet pressure, the pressure in the second cavity 320 includes the water inlet pressure and the elastic force provided by the first elastic member 440, the pressure in the second side 430 is the water inlet pressure and the elastic force, i.e. the pressure in the first side 420 is smaller than the pressure in the second side 430, so that the electromagnetic valve 500 abuts against the drain hole 230, and the conduction between the water inlet 210 and the water outlet 220 is prevented; when the on-off control device 100 is in the open state, the water pressure in the second cavity 320 is released from the through hole 410 via the drain hole 230, and the pressure on the first side 420 is greater than the pressure on the second side 430, and the on-off control member moves from the first position to the second position of the on-off control cavity 300, as shown in fig. 3, to drive the electromagnetic valve 500 away from the through hole 410, so that the water inlet 210 and the water outlet 220 are connected, and the faucet discharges water.

As shown in fig. 1 to 5, a first elastic member 440 is connected to one side of the on-off control element 400, the first elastic member 440 is disposed in the second cavity 320, and the on-off control element 400 is controlled to move between a first position and a second position of the on-off control cavity 300 by extending and compressing the first elastic member 440.

The electromagnetic valve 500 is disposed in the main body 200, the electromagnetic valve 500 includes a first valve core 510, the first valve core 510 is disposed opposite to the through hole 410, the first valve core 510 is controlled to be abutted against or away from the through hole 410 by the on-off control of the electromagnetic valve 500, so as to change the pressure difference between the first cavity 310 and the second cavity 320, and control the closing and the conduction of the water inlet 210 and the water outlet 220.

In this embodiment, the on-off control element 400 is connected with a first elastic member 440, the first elastic member 440 is used for providing elastic support for the movement of the on-off control element 400, specifically, the pressure difference between the first cavity 310 and the second cavity 320 is changed by the on-off of the electromagnetic valve 500, when the electromagnetic valve 500 is powered off, the pressure in the second cavity 320 is greater than the pressure in the first cavity 310, so that the on-off control element 400 is located at the first position of the on-off control cavity 300, the first valve core 510 is abutted against the through hole 410 to control the water inlet 210 and the water outlet 220 to be closed, and the faucet cannot discharge water; when the electromagnetic valve 500 is powered on, the pressure in the first cavity 310 is greater than the pressure in the second cavity 320, that is, the water inlet pressure is greater than the elastic force of the first elastic member 440, so that the on-off control element 400 moves from the first position in the on-off control cavity 300 to the second position in the on-off control cavity 300, at this time, the first valve core 510 moves along the direction away from the on-off control element 400, the first valve core 510 is separated from the through hole 410, the water inlet 210 is conducted with the water outlet 220, the faucet discharges water, after the electromagnetic valve 500 is powered off again, the on-off control element 400 is reset to the first position in the on-off control cavity 300 under the action of the first elastic member 440, and the water inlet 210 and the water outlet 220 are continuously controlled to be closed, so that the circulation is repeated. By arranging the first elastic member 440 and the electromagnetic valve 500, the on-off control element 400 can accurately control the on-off state of the water inlet 210 and the water outlet 220 according to the on-off state of the electromagnetic valve 500, and can be quickly reset, so that the control is flexible and the reliability is high.

As shown in fig. 1 to 5, a water sealing end 511 is disposed on one side of the first valve core 510 near the through hole 410, a second elastic member 512 is connected to the other side of the first valve core 510, and the first valve core 510 is controlled to compress the second elastic member 512 by energizing the electromagnetic valve 500, so as to control the water sealing end 511 to be far away from the through hole 410.

In this embodiment, two sides of the first valve core 510 are respectively provided with a water sealing end 511 and a second elastic member 512, the water sealing end 511 is used for being connected with the through hole 410, controlling the pressure difference between the first cavity 310 and the second cavity 320, the second elastic member 512 is used for providing elastic support for the first valve core 510, when the electromagnetic valve 500 is powered on, the first valve core 510 can be controlled to be far away from the drain hole 230 only by overcoming the elastic force of the second elastic member 512, so that the second cavity 320 is communicated with the through hole 410, and further the pressure in the second cavity 320 is reduced, the water inlet 210 and the water outlet 220 are controlled to be conducted, and when the electromagnetic valve 500 is powered off, the second elastic member 512 drives the second valve core 600 to reset, so that the water sealing end 511 is abutted with the through hole 410, and further the water inlet 210 and the water outlet 220 are controlled to be turned off. Through setting up first case 510 to set up water seal end 511 and second elastic component 512 in the both sides of first case 510, make under the break-make state, first case 510 can quick response remove, control the opening and closing of wash port 230, and then change the pressure differential between first cavity 310 and the second cavity 320, realize tap's quick play water and close water, control accurate high efficiency, the reliability is high, the practicality is strong.

As shown in fig. 1 to 5, the on-off control element 400 is provided with a through hole 450, a thimble 451 is disposed in the through hole 450, and when the on-off control element 400 moves between a first position and a second position in the on-off control cavity 300, the through hole 450 moves along an axial direction of the thimble 451.

The diameter of the drain hole 230 is greater than or equal to three times the diameter of the via hole 450.

And in the same horizontal plane, the projection plane of the maximum outline of the thimble arranged in the through hole is positioned in the projection plane of the minimum outline of the through hole.

In the same horizontal plane, the difference of the cross sectional areas of the through hole and the thimble is less than or equal to 0.5mm ² 。

In the present embodiment, the on-off control element 400 is provided with a via 450, and the via 450 and the first viaThe two cavities 320 are communicated, the diameter of the through hole 450 is smaller than that of the drain hole 230, the diameter of the drain hole 230 is greater than or equal to three times the diameter of the through hole 450, under the condition that processing requirements are met, the pressure in the second cavity 320 is reduced to the greatest extent, the water pressure of tap water can be overcome by the low-power electromagnetic valve 500, water outlet and closing of a control tap are achieved, and the on-off control device 100 provided in the embodiment is small in size, high in integration degree and wide in application range. In addition, by arranging the thimble 451 in the second cavity 320 and passing through the via hole 450, on one hand, when the on-off control element 400 moves, the via hole 450 also moves along the axial direction of the thimble 451, so that the thimble 451 can clean impurities in the via hole 450, and avoid impurity blockage caused by long-time use; on the other hand, the thimble 451 can also be used for adjusting the diameter of the via hole 450, and the diameter of the via hole 450 is limited due to the limitation of the processing technology, so that the inner diameter of the via hole 450 can be adjusted randomly through the thimble 451, the diameter ratio of the via hole 450 to the drain hole 230 is controlled, and the adjustment is flexible and convenient, and the practicability is high. The through hole 450 includes a water through section, the water through section is in the same horizontal plane, the difference between the cross sectional areas of the through hole 450 and the thimble 451, the pressure relief of the on-off control element 400 is controlled by changing the size of the water through section, in this embodiment, the thimble 451 is disposed in the through hole 450, the size of the water through section of the through hole 450 is controlled, and the cross sectional area of the water through section is preferably less than or equal to 0.5mm ² Even in a state of small water pressure, the on-off control element 400 can move in the on-off control cavity 300, so that the conduction between the water inlet 210 and the water outlet 220 is controlled, and the device is flexible and convenient to adjust and high in practicability.

As shown in fig. 1 to 5, the water inlet 210 includes a first water inlet 211 and a second water inlet 212, the main body 200 is provided with a knob 130, the knob 130 is connected with a second valve core 600, an adjusting member 610 is disposed in the second valve core 600, and the knob 130 controls the communication between the adjusting member 610 and the water inlet 210 or the closing thereof, so as to control the first water inlet 211 to be communicated with the water inlet 110, or the second water inlet 212 to be communicated with the water inlet 110.

The adjusting member 610 includes an open portion 611 and a closed portion 612 disposed at intervals, and the first water inlet 211 is controlled to communicate with the open portion 611 or the second water inlet 212 is controlled to communicate with the open portion 611 by the knob 130.

The open portion 611 includes at least two through holes 410, and the closed portion 612 includes at least two closed plates, the through holes 410 being spaced apart from the closed plates.

The first water inlet 211 and the second water inlet 212 are arranged at one end of the second valve core 600 in parallel, and the other end of the second valve core 600 is connected with the knob 130.

In this embodiment, the adjusting member 610 includes an open portion 611 and a closed portion 612 that are distributed at intervals, by rotating the knob 130, so that the open portion 611 is respectively communicated with the first water inlet hole 211 or the second water inlet hole 212, when the knob 130 rotates to the third position, the first water inlet hole 211 is communicated with the through hole 410, the electric faucet is in an induction mode, at this time, the first water inlet hole 211 is communicated with the water inlet channel 110, water flows in through the first water inlet hole 211, at this time, the outflow and shutoff of the water flow are controlled by the on-off of the electromagnetic valve 500, specifically, when the electromagnetic valve 500 receives a boiled water signal of an external user, the electromagnetic valve 500 is electrified, the first water inlet hole 211 is controlled to be communicated with the through hole 410, so that the water flow can normally flow out, when the electromagnetic valve 500 does not receive a boiled water signal of the external user, the electromagnetic valve 500 is powered off, the first water inlet hole 211 is shut off from the through hole 410, at this time, and the water flow does not flow out; when the knob 130 rotates to the fourth position, the second water inlet 212 is connected to the through hole 410, the electric faucet is in a non-sensing mode, the second water inlet 212 is connected to the water inlet 110, water flows directly from the second water inlet 212 to the water outlet 220, and the electric faucet is in a boiled water state. Through setting up the open portion 611 and the closure portion 612 of interval distribution, and the first water inlet 211 and the second water inlet 212 of adjacent setting for rotatory knob 130 can control electric tap and be in the induction mode or the non-induction mode, and through-hole 410 and the closure plate of interval setting make electric tap switch between two modes nimble, and it is convenient to adjust, and the reliability is high.

The on-off control device 100 operates as follows: when the adjusting piece 610 rotates to the third position, the first water inlet hole 211 is communicated with the through hole 410, the electric faucet is in an induction mode, at this time, the first water inlet hole 211 is communicated with the water inlet channel 110, water flows in through the first water inlet hole 211, at this time, the outflow and the shutoff of the water flow are controlled by the on-off control of the electromagnetic valve 500, specifically, when the electromagnetic valve 500 receives a boiled water signal of an external user, the electromagnetic valve 500 is electrified, the first water inlet hole 211 is controlled to be communicated with the through hole 410, so that the water flow can normally flow out, when the electromagnetic valve 500 does not receive the boiled water signal of the external user, the electromagnetic valve 500 is powered off, and the first water inlet hole 211 and the through hole 410 are shut off, at this time, the water flow does not flow out; when the adjusting member 610 rotates to the fourth position, the second water inlet 212 is communicated with the through hole 410, the electric faucet is in a non-sensing mode, the second water inlet 212 is communicated with the water inlet 110, water flows directly from the second water inlet 212 to the water outlet 220, and the electric faucet is in a boiled water state.

Example two

As shown in fig. 6, the embodiment provides an electric heating faucet 700, which comprises a control cavity 710 and a heating cavity 720, wherein the on-off control device 100 according to the first embodiment is installed in the control cavity 710, and a heating pipe is disposed in the heating cavity 720.

In this embodiment, an electric heating faucet 700 is further provided, the electric heating faucet 700 includes a control chamber 710 and a heating chamber 720, the on-off control device 100 described in the first embodiment is disposed in the control chamber 710, a heating pipe is disposed in the heating chamber 720, after tap water enters the electric heating faucet 700 through the water inlet channel 110, whether water flows out or not is controlled by the on-off control device 100, if water flows out, the flowing water flows out through the water outlet channel 120 after being heated by the heating pipe, and is used by a user. By arranging the on-off control device 100 in the electric heating faucet 700, the water outlet control of the electric heating faucet 700 is more intelligent and reliable, and the operation is flexible and convenient.

It should be noted that the description of the present utility model as it relates to "first", "second", "a", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. The terms "coupled," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally formed, for example; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a make-and-break controlling means, its both ends are connected with inlet channel and play water channel respectively, its characterized in that includes the main part, be provided with in the main part with inlet channel is linked together the apopore, with the apopore that the outlet channel is linked together, and with the apopore is linked together, wherein, be provided with the break-make control chamber in the main part, be provided with on-off control element in the break-make control chamber, on-off control element set up with the through-hole that the apopore is linked together, through on-off control element is in the break-and-break control intracavity removes, control the inlet orifice with the switch on and switch off of apopore.

2. The on-off control device according to claim 1, wherein the on-off control element divides the on-off control cavity to form a first cavity and a second cavity, the water inlet is respectively communicated with the first cavity and the second cavity, and the on-off control element moves between a first position and a second position of the on-off control cavity to control the connection and the disconnection of the water inlet and the water drain.

3. An on-off control device according to claim 2, characterized in that the on-off control element comprises a first side located in the first cavity and a second side located in the second cavity, the on-off control element being controlled to move between a first position and a second position of the on-off control cavity by varying the pressure difference between the first side and the second side.

4. An on-off control device according to claim 2, wherein a first elastic member is connected to one side of the on-off control element, the first elastic member is disposed in the second cavity, and the on-off control element is controlled to move between a first position and a second position of the on-off control cavity by stretching and compressing the first elastic member.

5. The on-off control device according to claim 2, wherein an electromagnetic valve is arranged in the main body, the electromagnetic valve comprises a first valve core, the first valve core is arranged opposite to the through hole, the first valve core is controlled to be abutted against or away from the through hole through the on-off control of the electromagnetic valve, the pressure difference between the first cavity and the second cavity is further changed, and the closing and the conduction of the water inlet hole and the water outlet hole are controlled.

6. The on-off control device according to claim 5, wherein a water sealing end is arranged on one side of the first valve core, which is close to the through hole, and a second elastic piece is connected on the other side of the first valve core, and the first valve core is controlled to compress the second elastic piece through the electrification of the electromagnetic valve, so that the water sealing end is controlled to be far away from the through hole.

7. The on-off control device according to claim 2, wherein the on-off control element is provided with a via hole, a thimble is arranged in the via hole, and a maximum profile projection surface of the thimble arranged in the via hole is positioned in a minimum profile projection surface of the via hole in the same horizontal plane.

8. An on-off control device according to claim 7, wherein the difference between the cross-sectional areas of the through hole and the ejector pin is less than or equal to 0.5mm in the same horizontal plane ² 。

9. The on-off control device according to claim 1, wherein the water inlet comprises a first water inlet and a second water inlet, the main body is provided with a knob, the knob is connected with a second valve core, an adjusting piece is arranged in the second valve core, the knob is used for controlling the communication or closing of the adjusting piece and the water inlet, and further controlling the first water inlet to be communicated with the water inlet channel, or the second water inlet to be communicated with the water inlet channel.

10. The on-off control device according to claim 9, wherein the adjusting member comprises an open part and a closed part which are arranged at intervals, and the first water inlet hole is controlled to be communicated with the open part or the second water inlet hole is controlled to be communicated with the open part through the knob.

11. An electric heating faucet is characterized by comprising a control cavity and a heating cavity, wherein the on-off control device as claimed in any one of claims 1-10 is arranged in the control cavity, and a heating pipe is arranged in the heating cavity.