CN106642730B - Electric heating faucet with electric leakage protection function - Google Patents
Electric heating faucet with electric leakage protection function Download PDFInfo
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- CN106642730B CN106642730B CN201710061824.3A CN201710061824A CN106642730B CN 106642730 B CN106642730 B CN 106642730B CN 201710061824 A CN201710061824 A CN 201710061824A CN 106642730 B CN106642730 B CN 106642730B
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- pressure
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- heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
Abstract
The invention discloses an electric heating faucet with an electric leakage protection function, which is provided with: a heating cavity; a water inlet channel; a water outlet channel; an on-off valve; an electric switch; the first pressure comparison cavity is communicated with the water inlet channel; the second pressure comparison cavity is communicated with the heating cavity; the rocker is rotatably arranged, and the first end of the rocker abuts against the ejector rod; elastic diaphragm and earth leakage protection subassembly. According to the invention, the difference value between the pressure of water in the water inlet channel and the pressure of water in the heating cavity is associated with the power on/off of the electric switch, so that when the water flow of the water inlet channel is larger, the electric heating body is started in advance to prepare for heating water; when the water flow of the water inlet channel is small, the electric heating body is closed in advance to prevent the electric heating body from being burnt when the water in the heating cavity is small, so that the service lives of the electric heating body and the electric heating faucet with the electric leakage protection function are effectively prolonged. The leakage protection assembly is used for grounding the metal shell, so that the safety of the electric heating faucet is improved.
Description
Technical Field
The invention relates to an electric heating faucet with an electric leakage protection function.
Background
Electric heating faucet with earth leakage protection among the prior art all has a heating chamber, sets up an electric heating body through electric switch control in the heating chamber, and when electric heating faucet with earth leakage protection opened, the electric switch was in the closure state all the time, and the electric heating body was in the on-state all the time. However, when the water flowing into the heating cavity of the electric heating faucet with the leakage protection function is too small, the electric heating body is dry-burned due to the small water, so that the service life of the electric heating faucet with the leakage protection function is shortened.
Disclosure of Invention
In order to solve the technical problems in the prior art, embodiments of the present invention provide an electric heating faucet with a leakage protection function.
In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:
an electric heating faucet with an electric leakage protection function, the electric heating faucet with the electric leakage protection function is provided with:
a metal housing;
a heating cavity formed inside the metal housing, wherein an electric heating body is arranged in the heating cavity;
a water inlet passage communicating with the heating chamber to supply water to the heating chamber;
the water outlet channel is communicated with the heating cavity, and water in the heating cavity flows out of the water outlet channel;
the switch valve is used for controlling the on-off of the water inlet channel;
the electric switch is used for controlling the on-off of the electric heating body and is provided with a mandril, and the mandril has a retraction state for closing the electric switch and an extension state for opening the electric switch;
the first pressure comparison cavity is communicated with the water inlet channel;
a second pressure comparison chamber in communication with the heating chamber;
the rocker is rotatably arranged, and a first end of the rocker abuts against the ejector rod;
a leakage protection assembly grounding the metal case;
the first pressure comparison cavity and the second pressure comparison cavity are divided by the elastic diaphragm, so that when the water pressure in the first pressure comparison cavity is greater than the pressure in the second pressure comparison cavity, the elastic diaphragm deforms towards the direction of the second pressure comparison cavity; the second end of wane with elastic diaphragm connects, in order to work as first pressure ratio is to the water pressure of intracavity with when the pressure differential of the water pressure of intracavity is greater than predetermined pressure difference to the second pressure ratio, elastic diaphragm drives the second end court of wane the second pressure ratio chamber motion, so that the first end of wane pushes away the ejector pin, the ejector pin is switched to the state of contracting by the state of stretching out.
Preferably, the pressure control valve further comprises a control valve core and a control spring, the control valve core is arranged in the heating cavity and located at a position opposite to the water outlet of the water inlet channel, and the control spring is used for enabling the control valve core to block the water outlet of the water inlet channel, so that when the water in the water inlet channel exceeds a preset pressure value, the control valve core is opened, and the water in the water inlet channel flows into the heating cavity.
Preferably, the wane is the L template, the vertical setting of elastic diaphragm, first pressure ratio to the chamber with second pressure ratio is located elastic diaphragm's both sides, the electric switch set up in elastic diaphragm's below, the second end of wane bury underground in elastic diaphragm, the first end of wane with the horizontally mode with the electric switch the ejector pin offsets.
Preferably, the heating device further comprises a temperature sensor and a control module, wherein the temperature sensor is arranged in the heating cavity and used for measuring the temperature of water in the heating cavity and sending the measured temperature value to the control module, and the control module controls the on-off of the power supply according to the temperature value so as to control the on-off of the electric heater.
Compared with the prior art, the electric heating faucet with the electric leakage protection function has the beneficial effects that: according to the invention, the difference value between the pressure of water in the water inlet channel and the pressure of water in the heating cavity is associated with the power on/off of the electric switch, so that when the water flow of the water inlet channel is larger, the electric heating body is started in advance to prepare for heating water; when the water flow of the water inlet channel is small, the electric heating body is closed in advance to prevent the electric heating body from being burnt when the water in the heating cavity is small, so that the service lives of the electric heating body and the electric heating faucet with the electric leakage protection function are effectively prolonged.
The invention also adds an electric leakage protection component which is used for grounding the metal shell, thereby improving the safety of the electric heating faucet.
Drawings
FIG. 1 is a structural view of an electric heating faucet with leakage protection function according to an embodiment of the present invention
Intention is.
Fig. 2 is an enlarged view of a portion a of fig. 1.
In the figure:
1-a shell; 2-a base; 3-heating the cavity; 4-an electric heater; 5-a temperature sensor; 6-control the valve sleeve; 7-control valve core; 8-control spring; 9-an elastic diaphragm; 10-first pressure ratio to cavity; 11-second pressure ratio cavity; 12-a duct; 13-a rocker; 14-a scaffold; 15-an electrical switch; 16-a control module; 17-a water inlet pipe; 18-a water outlet pipe; 19-a valve core; 20-a valve housing; 21-a handle; 22-side cylinder; 1501-mandril.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, an embodiment of the present invention provides an electric heating faucet with an electric leakage protection function, which includes a metal housing 1, a heating cavity 3 formed inside the water inlet housing 1, a water inlet channel, a water outlet channel, a switch valve, an electric switch 15, a first pressure comparison cavity 10, a second pressure comparison cavity 11, a rocker 13, and an elastic diaphragm 9. Specifically, an electric heater 4 is arranged in the heating cavity 3; the water inlet channel is communicated with the heating cavity 3 to supply water to the heating cavity 3; the water outlet channel is communicated with the heating cavity 3, and water in the heating cavity 3 flows out from the water outlet channel; the switch valve is used for controlling the on-off of the water inlet channel; the electric switch 15 is used for controlling the on-off of the electric heating body 4, the electric switch 15 is provided with a mandril 1501, and the mandril 1501 has a retraction state for closing the electric switch 15 and an extension state for opening the electric switch 15; the first pressure comparison cavity 10 is communicated with the water inlet channel; the second pressure ratio cavity 11 is communicated with the heating cavity 3; the rocker 13 is arranged in a rotatable manner, and the first end of the rocker 13 is abutted against the ejector rod 1501; the first pressure ratio cavity 10 and the second pressure ratio cavity 11 are divided by the elastic diaphragm 9, so that when the water pressure in the first pressure ratio cavity 10 is greater than the pressure in the second pressure ratio cavity 11, the elastic diaphragm 9 deforms towards the direction of the second pressure ratio cavity 11; the second end of the rocker 13 is connected to the elastic diaphragm 9, so that when the pressure difference between the water pressure in the first pressure ratio chamber 10 and the water pressure in the second pressure ratio chamber 11 is greater than the predetermined pressure difference, the elastic diaphragm 9 drives the second end of the rocker 13 to move toward the second pressure ratio chamber 11, so that the first end of the rocker 13 pushes the push rod 1501, and the push rod 1501 is switched from the extended state to the retracted state.
According to the above, as shown in fig. 2, when water continuously enters the heating chamber 3 through the water inlet channel and flows out from the heating chamber 3 through the water outlet channel for use by a user, the water in the water inlet channel simultaneously enters the first pressure comparison chamber 10, and the pressure of the water in the first pressure comparison chamber 10 is the same as the pressure of the water in the water inlet channel; the water in the heating chamber 3 simultaneously enters the second pressure ratio chamber 11, which is the same as the pressure of the water in the heating chamber 3 than the pressure of the water in the chamber 11. When the pressure difference between the first pressure ratio and the second pressure ratio between the pressure of the water in the cavity 10 and the pressure of the water in the cavity 11 is greater than the predetermined pressure difference, it indicates that the water pressure of the water in the water inlet channel is greater than the pressure of the water in the heating cavity 3, and it indicates that the flow rate of the water in the water inlet channel is greater, and the water with the greater flow rate needs to be heated by the electric heating body 4 after entering the heating cavity 3. At this moment, under the effect of pressure difference, elastic diaphragm 9 drives the second end of wane 13 and moves towards second pressure ratio to chamber 11, and wane 13 takes place to rotate so that the first end of wane 13 pushes away ejector pin 1501 of electric switch 15 to make electric switch 15 closed, thereby make electric heater 4 circular telegram, electric heater 4 is for getting into the water that nevertheless exists in the water inlet channel in heating chamber 3 and provide the heating preparation. When the difference between the first pressure ratio and the second pressure ratio between the pressure of the water in the chamber 10 and the pressure of the water in the chamber 11 is smaller than the predetermined pressure difference, it means that the pressure of the water in the water inlet passage is smaller than the pressure of the water in the heating chamber 3, meanwhile, the flow rate of the water in the water inlet channel is small, if the small flow rate of the water enters the heating cavity 3, the electric heater 4 is still in the state of being electrically heated, and the electric heater 4 is easily dried, however, at this time, because the pressure difference is smaller than the predetermined pressure difference, the elastic diaphragm 9 drives the second end of the rocker 13, so that the first end of the rocker 13 cannot push against the push rod 1501 to make the push rod 1501 in the retracted state and close the electric switch 15, that is, the electric heater 4 is powered off at this time, thereby effectively preventing the water in the water inlet channel from flowing less, after the water with the smaller flow enters the heating cavity 3, the electric heating body 4 is still in a heating state, so that the electric heating body 4 is dried.
The invention relates to the on-off of the electric switch 15 according to the difference value between the pressure of water in the water inlet channel and the pressure of water in the heating cavity 3, so that when the water flow of the water inlet channel is larger, the electric heating body 4 is started in advance to prepare for heating water; when the water flow of the water inlet channel is small, the electric heating body 4 is closed in advance to prevent the electric heating body 4 from being dried when the water in the heating cavity 3 is less, so that the service lives of the electric heating body 4 and the electric heating faucet with the electric leakage protection function are effectively prolonged.
It should be noted that: the predetermined pressure difference value needs to be set according to the power of the electric heater 4, that is, when the power of the electric heater 4 is larger, the predetermined pressure difference value needs to be set to a smaller value, so that the sensitivity of the electric switch 15 is increased, the sensitivity of the electric heater 4 for switching on and off is also increased, and the electric heater 4 can be more effectively prevented from being burnt dry; when the power of the electric heating body 4 is smaller, the preset pressure difference value needs to be set to a larger value, so that the action of the electric switch 15 is slower, the power-on and power-off frequency of the electric heating body 4 is reduced, the power-on and power-off conversion times are reduced, and the electric heating body cannot reach the dry burning degree due to the fact that the power of the electric heating body 4 is smaller and the heat productivity is small.
Because the metal shell 1 leaks electricity, the invention is also additionally provided with an electric leakage protection component which is used for grounding the metal shell 1, thereby improving the safety of the electric heating faucet.
In order to prevent a small flow of water from entering the heating cavity 3, as shown in fig. 1, in a preferred embodiment of the present invention, the electric heating faucet with the electric leakage protection function further includes a pressure control valve, the pressure control valve includes a control valve core 7 and a control spring 8, the control valve core 7 is disposed in the heating cavity 3, the control valve core 7 is located at a position opposite to the water outlet of the water inlet channel, and the control spring 8 is configured to enable the control valve core 7 to block the water outlet of the water inlet channel, so that when the water in the water inlet channel exceeds a predetermined pressure value, the control valve core 7 is opened, and the water in the water inlet channel flows into the heating cavity 3.
The purpose of providing a pressure control valve is two: on one hand, the water pressure entering the heating cavity 3 is limited, namely the pressure of the water entering the electric heating faucet with the electric leakage protection function is limited, so that the electric heating faucet with the electric leakage protection function controls the circulation of the water according to the water pressure, namely, the electric heating faucet with the electric leakage protection function does not allow the water to flow when the pressure of the water is smaller than the pressure limited by the pressure control valve; on the other hand, the first pressure ratio chamber 10 and the second pressure ratio chamber 11 are facilitated to form a pressure difference, thereby facilitating the control of the electric switch 15.
It should be noted that: the preset pressure value is set according to the preset pressure difference value, and after the preset pressure value is obtained through calculation, the control spring 8 with a certain elastic coefficient can be calculated and selected so as to enable the control valve core 7 to be opened by water in the water inlet channel when the preset pressure value is higher than the preset pressure.
The mode that the rocker 13 can move along with the elastic diaphragm 9 can be various, the connection mode of the rocker 13 and the elastic diaphragm 9 can also be various, in a preferred embodiment of the invention, the rocker 13 is an L-shaped plate, the elastic diaphragm 9 is vertically arranged, the first pressure comparison cavity 10 and the second pressure comparison cavity 11 are positioned at two sides of the elastic diaphragm 9, the electric switch 15 is arranged below the elastic diaphragm 9, the second end of the rocker 13 is embedded in the elastic diaphragm 9, and the first end of the rocker 13 is abutted against the ejector rod 1501 of the electric switch 15 in a horizontal mode.
As can be seen from the above, the rocker 13 is a bridge formed by the elastic diaphragm 9 and the electric switch 15 in linkage, and is also a link formed by the change of the pressure difference between the first pressure ratio cavity 10 and the second pressure ratio cavity 11 and the electric switch 15. In fact, the rocker 13 transmits the pressure difference signal of the two pressure ratios to the cavity in a mechanical motion manner, so as to control the electric switch 15 according to the pressure difference signal, thereby achieving the purposes of heating and preventing dry burning.
The electric heating faucet with the electric leakage protection function has various structures, such as a water inlet channel and a water outlet channel, wherein the water inlet channel and the water outlet channel can be formed by through holes arranged in a solid body and can also be formed by inner holes of pipelines; for another example, the heating chamber 3 may be formed by an inner hole formed in one member, or may be formed by a plurality of members. A preferred embodiment of the present invention shows a preferred structure of the electric heating faucet with the electric leakage protection function of the present invention, and the specific structure is as follows.
As shown in fig. 1 and 2, the electric heating faucet with the electric leakage protection function specifically includes a metal shell 1, a base 2, an electric heating body 4, a water inlet pipe 17, a water outlet pipe 18, a switch valve, a pressure control valve, an electric switch 15, a temperature sensor 5, an elastic diaphragm 9, a rocker 13, and an electric leakage protection assembly. The metal shell 1 is cylindrical, and a side cylinder 22 is integrally welded and formed in the radial direction of the metal shell 1; base 2 sets up in metal casing 1, has seted up heating chamber 3 in base 2, and electric heater 4 sets up in heating chamber 3, and the concrete mode of setting is: the electric heater 4 is arranged at the bottom of the base 2 in a sealing way; an on-off valve is provided in the side cylinder 22, and specifically includes: the valve core 18 is arranged in the side cylinder 22, the valve sleeve 20 is sleeved on the valve core 18, and the handle 21 can drive the valve core 18 to move; the inner hole of the water inlet pipe 17 forms a part of a water inlet channel, the water inlet pipe 17 is communicated with the valve core 19 and is conducted or cut off by the valve core 19 under the swing of the handle 21, another part of the water inlet channel is formed between the heating cavity 3 and the valve core 19, the other part of the water inlet channel is a pore channel 12 arranged at the bottom of the base 2, and the two ends of the water inlet channel are respectively communicated with the valve core 19 and the heating cavity 3; meanwhile, a first pressure comparison cavity 10 is formed in the bottom of the base 2, and the first pressure comparison cavity 10 is communicated with the pore passage 12; a second pressure comparison cavity 11 is further formed in the bottom of the base 2, and the second pressure comparison cavity 11 is communicated with the heating cavity 3; the second pressure comparison cavity 11 is positioned at one side of the first pressure comparison cavity 10 and is separated by an elastic diaphragm 9; electric switch 15 is installed through switch support 14 in the below of base 2, rocker 13 one end is buried underground in elastic diaphragm 9, the other end passes the bottom of base 2 and offsets with the ejector pin 1501 of electric switch 15, simultaneously rocker 13 forms can little pivoted with the bottom of base 2 articulated, thereby when elastic diaphragm 9 warp and drive rocker 13, rocker 13 can rotate a little, thereby push up ejector pin 1501, and ejector pin 1501 is compressed and make electric switch 15 closed, or the orientation rotation that dodges from ejector pin 1501 is and ejector pin 1501 stretches out towards, electric switch 15 disconnection, thereby make first pressure compare chamber 10 and second pressure compare the pressure differential between the chamber 11 can change electric switch 15's the state of opening and shutting. The pressure control valve is arranged in the heating cavity 3, a control valve core 7 of the pressure control valve is opposite to a water outlet of the water inlet channel, the control valve core 7 is arranged in the control valve sleeve 6, and a control spring 8 of the pressure control valve is arranged in the control valve sleeve 6 and pushes the control valve core 7 to block the water outlet. A water outlet pipe 18 is arranged at the upper end of the heating cavity 3 and is communicated with the heating cavity 3, an inner hole of the water outlet pipe 18 forms a water outlet channel, the water outlet pipe 18 is actually an elbow for water outlet, and water heated by the heating cavity 3 flows out through the water outlet pipe 18. A temperature sensor 5 is also arranged in the heating cavity 3, the temperature sensor 5 is plugged at the bottom of the base 2 in a sealing manner, and the temperature sensor 5 is used for measuring the temperature of water in the heating cavity 3; still install control module 16 in the metal casing 1 of the below of base 2, this control module 16 is connected with temperature sensor 5 and switch, and temperature sensor 5 sends the temperature value of measuring for control module 16, and this control module 16 is used for controlling switch according to the temperature value. For example, when the temperature value measured by the temperature sensor 5 is greater than 50 ℃ or less than 0 ℃, the control module 16 controls the power switch to be turned off, and at this time, the electric heater 4 stops heating, thereby effectively protecting the electric heater 4 and other functional components. The electric leakage protection assembly comprises two-core grounding wires 23, a grounding gasket 24 and an electric leakage detection coil, wherein a zero wire and a live wire are arranged in the electric leakage detection coil in a penetrating mode, when the electric heating faucet is not in electric leakage, the currents flowing through the zero wire and the live wire are equal, when the electric leakage occurs, the currents of the zero wire and the live wire are unequal, so that the electric leakage can be detected, one wire core in the two-core grounding wires 23 is connected with the electric heating body 4, the other wire core is connected to the bottom of the metal shell 1 through the grounding gasket 24, so that the metal shell 1 and an internal assembly comprising the base 2 are grounded, and the use safety of the electric heating faucet is improved.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (2)
1. The utility model provides an electric heat tap with earth leakage protection function which characterized in that, electric heat tap with earth leakage protection function has:
a metal housing;
the heating cavity is formed in the metal shell, and an electric heating body is arranged in the heating cavity;
a water inlet passage communicating with the heating chamber to supply water to the heating chamber;
the water outlet channel is communicated with the heating cavity, and water in the heating cavity flows out of the water outlet channel;
the switch valve is used for controlling the on-off of the water inlet channel;
the electric switch is used for controlling the on-off of the electric heating body and is provided with a mandril, and the mandril has a retraction state for closing the electric switch and an extension state for opening the electric switch;
the first pressure comparison cavity is communicated with the water inlet channel;
a second pressure comparison chamber in communication with the heating chamber;
the rocker is rotatably arranged, and a first end of the rocker abuts against the ejector rod;
a leakage protection assembly grounding the metal case;
the first pressure comparison cavity and the second pressure comparison cavity are divided by the elastic diaphragm, so that when the water pressure in the first pressure comparison cavity is greater than the pressure in the second pressure comparison cavity, the elastic diaphragm deforms towards the direction of the second pressure comparison cavity; the second end of the rocker is connected with the elastic diaphragm, so that when the pressure difference between the water pressure in the first pressure ratio cavity and the water pressure in the second pressure ratio cavity is larger than a preset pressure difference value, the elastic diaphragm drives the second end of the rocker to move towards the second pressure ratio cavity, the first end of the rocker pushes the ejector rod, and the ejector rod is switched from an extending state to a retracting state;
still include the pressure control valve, the pressure control valve including set up in control valve core and control spring in the heating chamber, the control valve core be located with the position that the delivery port of inhalant canal is relative, control spring is used for making the shutoff of control valve core the delivery port of inhalant canal, so as to work as when water in the inhalant canal exceeds predetermined pressure value, the control valve core is opened, rivers in the inhalant canal are gone into in the heating chamber.
The wane is the L template, the vertical setting of elastic diaphragm, first pressure compare the chamber with second pressure compares the chamber and is located elastic diaphragm's both sides, the electric switch set up in elastic diaphragm's below, the second end of wane bury underground in elastic diaphragm, the first end of wane with the horizontally mode with the electric switch the ejector pin offsets.
2. The electric heating faucet with the electric leakage protection function as claimed in claim 1, further comprising a temperature sensor and a control module, wherein the temperature sensor is disposed in the heating chamber and is used for measuring the temperature of water in the heating chamber and sending the measured temperature value to the control module, and the control module controls the on/off of the power supply according to the temperature value so as to control the on/off of the electric heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710061824.3A CN106642730B (en) | 2017-01-26 | 2017-01-26 | Electric heating faucet with electric leakage protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710061824.3A CN106642730B (en) | 2017-01-26 | 2017-01-26 | Electric heating faucet with electric leakage protection function |
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| Publication Number | Publication Date |
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| CN106642730A CN106642730A (en) | 2017-05-10 |
| CN106642730B true CN106642730B (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710061824.3A Active CN106642730B (en) | 2017-01-26 | 2017-01-26 | Electric heating faucet with electric leakage protection function |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2537223A1 (en) * | 1975-08-21 | 1977-02-24 | Gerdes Claus Holmer | Membrane operated switch for instant electric water heater - has water pressure controlled membrane in housing carrying heating chamber |
| CN201028114Y (en) * | 2007-06-01 | 2008-02-27 | 陈成云 | Porcelain wave water tap |
| CN201796814U (en) * | 2010-05-18 | 2011-04-13 | 珠海吉泰克燃气设备技术有限公司 | Differential pressure switch |
| CN204533797U (en) * | 2015-02-10 | 2015-08-05 | 陈海峰 | The Instant heating type water tap of safety |
| CN205824365U (en) * | 2016-06-30 | 2016-12-21 | 宁波惠荣电器有限公司 | A kind of electric hot water tap being controlled switch by differential water pressures |
| CN206504482U (en) * | 2017-01-26 | 2017-09-19 | 宁波惠荣电器有限公司 | Electric hot water tap with creepage protection function |
-
2017
- 2017-01-26 CN CN201710061824.3A patent/CN106642730B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2537223A1 (en) * | 1975-08-21 | 1977-02-24 | Gerdes Claus Holmer | Membrane operated switch for instant electric water heater - has water pressure controlled membrane in housing carrying heating chamber |
| CN201028114Y (en) * | 2007-06-01 | 2008-02-27 | 陈成云 | Porcelain wave water tap |
| CN201796814U (en) * | 2010-05-18 | 2011-04-13 | 珠海吉泰克燃气设备技术有限公司 | Differential pressure switch |
| CN204533797U (en) * | 2015-02-10 | 2015-08-05 | 陈海峰 | The Instant heating type water tap of safety |
| CN205824365U (en) * | 2016-06-30 | 2016-12-21 | 宁波惠荣电器有限公司 | A kind of electric hot water tap being controlled switch by differential water pressures |
| CN206504482U (en) * | 2017-01-26 | 2017-09-19 | 宁波惠荣电器有限公司 | Electric hot water tap with creepage protection function |
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| CN106642730A (en) | 2017-05-10 |
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