CN212323349U - Electric water heater plug and electric water heater - Google Patents
Electric water heater plug and electric water heater Download PDFInfo
- Publication number
- CN212323349U CN212323349U CN202020985881.8U CN202020985881U CN212323349U CN 212323349 U CN212323349 U CN 212323349U CN 202020985881 U CN202020985881 U CN 202020985881U CN 212323349 U CN212323349 U CN 212323349U
- Authority
- CN
- China
- Prior art keywords
- switch
- signal
- water heater
- ground wire
- voltage detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Breakers (AREA)
Abstract
The utility model discloses an electric water heater plug and electric water heater, wherein, the electric water heater plug includes that the tripolar is participated in, trip switch, ground wire detecting element and trip circuit, whether ground wire detecting element is used for detecting external power socket's ground wire bad or disappearance, and output ground wire detected signal to trip circuit, when external power socket ground wire connects well, trip circuit does not start trip switch, when external power socket ground wire is bad or disappearance, trip circuit starts trip switch, break off the power between external power socket and the electric water heater, with guarantee user power consumption safety.
Description
Technical Field
The utility model relates to a water heater technical field, in particular to electric water heater plug and electric water heater.
Background
At present, an electric water heater is powered by mains supply, the electric water heater is connected with a power socket through a plug, the power socket has the problems of no grounding or poor grounding due to construction or other factors, and when the plug has the problems of aging, failure and the like, the electric water heater can have the potential danger of electrification due to the reason that the power socket has no grounding or poor grounding.
Accordingly, there is a need for targeted improvements to current electric water heaters.
SUMMERY OF THE UTILITY MODEL
The main object of the present invention is to provide an electric water heater plug, which is to solve one of the technical problems in the above technologies to a certain extent at least, so as to ensure the safety of electricity consumption.
In order to achieve the above object, the utility model provides an electric water heater plug includes:
the three-pole pin is used for being plugged with an external power socket;
the tripping switch is connected with the three-pole pin so as to connect and disconnect a zero line, a live line and a ground line which are connected with a power supply;
the ground wire detection unit is arranged corresponding to the zero line, the live wire and the ground wire and is used for detecting whether the ground wire of the external power socket is bad or missing or not and outputting a ground wire detection signal;
and the tripping circuit is used for receiving the ground wire detection signal and controlling the tripping switch to be switched off when the ground wire of the external power socket is poor or missing.
Preferably, the electric water heater plug further comprises:
the leakage detection unit is used for detecting whether the zero line or the live wire leaks electricity or not and outputting a leakage detection signal to the tripping circuit so that the tripping circuit controls the tripping switch to be switched off according to the leakage detection signal.
Preferably, the trip switch includes:
a three-pole linked switch, one end of the three-pole linked switch is connected with the three-pole pin, the other end of the three-pole linked switch is respectively connected with the zero line, the live line and the ground wire,
the control end of the tripping mechanism is connected with the controlled end of the three-pole linked switch, the signal end of the tripping mechanism is connected with the signal end of the tripping circuit, and the tripping mechanism is used for receiving a tripping instruction output by the tripping circuit when the ground wire of the external power socket is poor or is lost so as to control the three-pole linked switch to be disconnected.
Preferably, the ground line detecting unit includes:
the first voltage detection unit is used for detecting voltage signals of the ground wire and the zero line and outputting a first voltage detection signal;
a first signal end of the second voltage detection unit is connected with the ground wire, a second signal end of the second voltage detection unit is connected with the live wire, a signal output end of the second voltage detection unit is connected with a signal end of the tripping circuit, and the second voltage detection unit is used for detecting voltage signals of the ground wire and the live wire and outputting a second voltage detection signal;
and the first signal end of the third voltage detection unit is connected with the zero line, the second signal end of the third voltage detection unit is connected with the live line, and the signal output end of the third voltage detection unit and the signal end of the tripping circuit are connected with the third voltage detection unit and used for detecting voltage signals of the zero line and the live line and outputting a third voltage detection signal.
Preferably, the first voltage detection unit, the second voltage detection unit and the third voltage detection unit each include a first resistor and a second resistor, a first end of the first resistor is the first signal end, a first end of the second resistor is the second signal end, and a second end of the first resistor and a second end of the second resistor are connected and are a signal output end of the voltage detection unit.
Preferably, the electric water heater plug further comprises:
a first signal input end of the switch selection unit is connected with a signal output end of the first voltage detection unit, a second signal input end of the switch selection unit is connected with a signal output end of the second voltage detection unit, a third signal input end of the switch selection unit is connected with a signal output end of the third voltage detection unit, a signal output end of the switch selection unit is connected with a signal end of the tripping circuit, and a controlled end of the switch selection unit is connected with the control of the tripping circuit;
the switch selection unit is used for receiving a switch selection signal of a trip circuit, and respectively communicating a first signal input end, a second signal input end and a third signal input end of the switch selection unit with a signal output end according to the switch selection signal, so as to respectively output a first voltage detection signal, a second voltage detection signal and a third voltage detection signal to the trip circuit.
Preferably, the switch selection unit includes a first switch, a second switch, and a third switch;
the input end of the first switch is the first signal input end of the switch selection unit, the input end of the second switch is the second signal input end of the switch selection unit, the input end of the third switch is the third signal input end of the switch selection unit, the output end of the first switch, the output end of the second switch and the output end of the third switch are interconnected, and the connection node of the first switch, the output end of the second switch and the output end of the third switch is the signal output end of the switch selection unit.
Preferably, the leakage detecting unit is an electromagnetic coil.
The utility model discloses still provide an electric water heater, this water heater includes:
an electric water heater plug as described above;
a body;
the power cord is respectively connected with the plug of the electric water heater and the connector, and the connector is used for connecting the body.
Preferably, an inner container and a heater are arranged in the body, and a temperature controller and a thermal circuit breaker are further connected between the connector and the body.
The utility model discloses electric water heater plug respectively draws forth a connecting wire and ground wire detecting element connection alone on ground wire, live wire, zero line to output ground wire detected signal to trip circuit, when external power source socket ground wire connects well, trip circuit does not start tripping device, when external power source socket ground wire is bad or lack, tripping device starts tripping device, cuts off the power between external power source socket and the electric water heater, with guarantee user's power consumption safety.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic block diagram of a first embodiment of an electric water heater plug according to the present invention;
fig. 2 is a schematic block diagram of a second embodiment of the plug of the electric water heater of the present invention;
fig. 3 is a schematic block diagram of a third embodiment of the plug of the electric water heater of the present invention;
fig. 4 is a schematic block diagram of a fourth embodiment of the plug of the electric water heater of the present invention;
fig. 5 is a schematic circuit diagram of an embodiment of a voltage detection unit in the plug of the electric water heater of the present invention;
fig. 6 is a schematic block diagram of a fifth embodiment of the plug of the electric water heater of the present invention;
fig. 7 is a schematic block diagram of a sixth embodiment of the plug of the electric water heater according to the present invention;
fig. 8 is a schematic structural diagram of an embodiment of the electric water heater of the present invention;
fig. 9 is a schematic block diagram of an embodiment of the electric water heater according to the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that the description relating to "first", "second", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is: the method comprises three parallel schemes, wherein the scheme is taken as an A/B (A/B) as an example, the scheme comprises a scheme A, a scheme B or a scheme A and a scheme B which are simultaneously met, in addition, the technical schemes between the various embodiments can be combined with each other, but the technical schemes must be realized by a person with ordinary skill in the art as a basis, and when the technical schemes are mutually contradictory or can not be realized, the combination of the technical schemes is not considered to exist, and the protection scope of the invention is not within the protection scope of the invention.
The utility model provides an electric water heater plug 110.
As shown in fig. 1, in the present embodiment, the plug 110 of the electric water heater includes:
the three-pole pin 10 is used for being plugged with an external power socket;
the trip switch 40, the trip switch 40 couples to tripolar base pin 10 in order to put through and cut off zero line N, live wire L and earth wire E which insert the power;
the ground wire detection unit 20 is arranged corresponding to the zero line N, the live line L and the ground wire E, and the ground wire detection unit 20 is used for detecting whether the ground wire E of the external power socket is bad or missing or not and outputting a ground wire detection signal;
and the tripping circuit 30 is used for receiving the ground wire detection signal and controlling the tripping switch 40 to be switched off when the ground wire E of the external power socket is poor or missing.
In this embodiment, the three-pole pin 10 may be a single-phase two-pole ground three-pole plug-in strip structure, and is connected to the external power socket in a plug-in manner to provide commercial power, the trip switch 40 may be a relay trip switch 40, or a combination of a trip mechanism 41 and a three-level linked switch, as shown in fig. 3, in an embodiment, the trip switch 40 includes a trip mechanism 41 and a three-pole linked switch 42, one end of the three-pole linked switch 42 is connected to the three-pole pin 10, the other end of the three-pole linked switch 42 is respectively connected to the zero line N, the live line L and the ground line E, a control end of the trip mechanism 41 is connected to a controlled end of the three-pole linked switch 42, a signal end of the trip mechanism 41 is connected to a signal end of the trip circuit 30, and the trip mechanism 41 is configured to receive a trip instruction output by the trip circuit 30 when the ground line E of the external power socket is bad or missing, so as to control the three-pole linked switch 42.
The ground wire detection unit 20 is arranged corresponding to the zero line N, the live line L and the ground wire E, and can be respectively connected with the live line L, the zero line N and the ground wire E on the input side of the trip switch 40 through connecting wires, and also can be respectively connected with the live line L, the zero line N and the ground wire E on the output side of the trip switch 40 through connecting wires, and the connection position of the ground wire detection unit 20 is not limited.
The ground wire detection unit 20 obtains voltage signals on the live wire L, the zero line N and the ground wire E through a connecting wire, and outputs detection signals to the trip circuit 30, and the trip circuit 30 can determine whether the ground wire E of the external power socket is bad or missing according to the voltage signals of the live wire L, the zero line N and the ground wire E. The specific judgment method is as follows:
ground line E is missing: when the ground wire E is correctly installed and the grounding is good, the voltage Vle close to the phase voltage exists between the live wire L and the ground wire E, when the ground wire E is not installed, the live wire L and the ground wire E cannot form a loop, the voltage Vle is close to zero, and when the voltage Vln between the live wire L and the zero line N is detected to be normal, and the voltage Vle between the live wire L and the ground wire E is detected to be close to zero, the ground wire E can be judged to be missing.
Poor ground wire E: although the external power socket ground wire E is already installed, there is a possibility that the ground wire E is bad due to the oxidation of the connection terminal, the disconnection of the ground wire E, etc., when the ground wire E is disconnected due to some reason, an induced voltage will be generated on the ground wire E due to the equivalent capacitance of the ground wire E to the live wire L, and at this time, the voltage Vle between the voltages of the live wire L to the ground wire E will be smaller than the voltage Vln of the live wire L to the zero wire N, that is, Vle < Vln and Vne > normal value (e.g. 6V), i.e., the ground wire E is bad.
When the ground wire E of the external power socket is determined to be good and normal, the trip circuit 30 does not output a control signal or output a start voltage signal to the trip switch 40 to keep the trip switch 40 in a closed state, and when the ground wire E of the external power socket is determined to be bad or missing, outputs a control signal or turns off the control signal to the trip switch 40 to turn off the trip switch 40, so that a power supply between the external power socket and the electric water heater is switched, and the electricity utilization safety of a user is improved.
The utility model discloses electric water heater plug 110 respectively draws forth a connecting wire alone on ground wire E, live wire L, zero line N and is connected with ground wire detecting element 20 to output ground wire detected signal to trip circuit 30, when external power source socket ground wire E connects well, trip circuit 30 does not start tripping switch 40, when external power source socket ground wire E is bad or lack, tripping circuit 30 starts tripping switch 40, break off the power between external power source socket and the electric water heater, with guarantee user power consumption safety.
As shown in fig. 2, in an embodiment, the electric water heater plug 110 further includes:
the leakage detection unit 50 is arranged corresponding to the zero line N and the live line L, and the leakage detection unit 50 is used for detecting whether leakage occurs to the zero line N or the live line L and outputting a leakage detection signal to the trip circuit 30, so that the trip circuit 30 controls the trip switch 40 to be switched off according to the leakage detection signal.
Specifically, the trip circuit 30 determines that the leakage occurs in the zero line N or the live line L when the leakage current value of the zero line N or the live line L detected by the leakage detecting unit 50 is greater than or equal to a first preset current value. The first preset current value can be calibrated according to actual conditions, the range of the first preset current value can be generally set within 30mA, and the first preset current value is preferably 5mA, 6mA, 10mA and 15 mA.
In one embodiment, if the insulation of the live device inside the electric water heater fails, the leakage of the neutral wire N or the live wire L may occur. The leakage detection unit 50 detects a leakage signal of the zero line N or the live line L to determine whether the zero line N or the live line L leaks electricity, and if the leakage current value of the zero line N or the live line L is greater than or equal to a first preset current value, it is determined that the zero line N or the live line L leaks electricity. When the zero line N or the live line L leaks electricity, the leakage signal of the zero line N or the live line L is sent to the tripping circuit 30, the tripping circuit 30 generates a tripping instruction to control the tripping switch 40, so that the tripping switch 40 generates a tripping action, the zero line N, the live line L and the ground line E are all in a breaking state quickly, the electric connection between the electric water heater and an external power socket is cut off, the electric water heater is in a non-electricity safe state, and the electricity safety can be effectively guaranteed.
The leakage detecting unit 50 may be an electromagnetic coil, and is configured to detect a leakage signal of the zero line N or the live line L and determine whether the zero line N or the live line L leaks electricity, and when the zero line N or the live line L leaks electricity, the tripping circuit 30 generates a tripping instruction, and the tripping mechanism 41 controls the three-pole link switch 42 when receiving the tripping instruction, so that the zero line N, the live line L, and the ground line E are all in a breaking state, and therefore, the power consumption safety can be effectively guaranteed.
As shown in fig. 4, in an embodiment, the ground line detecting unit 20 includes a first voltage detecting unit 21, a second voltage detecting unit 22 and a third voltage detecting unit 23, a first signal end of the first voltage detecting unit 21 is connected to the ground line E, a second signal end of the first voltage detecting unit 21 is connected to the zero line N, a signal output end of the first voltage detecting unit 21 is connected to a signal end of the trip circuit 30, the first voltage detecting unit 21 is configured to detect voltage signals of the ground line E and the zero line N and output a first voltage detection signal, a first signal end of the second voltage detecting unit 22 is connected to the ground line E, a second signal end of the second voltage detecting unit 22 is connected to the live line L, a signal output end of the second voltage detecting unit 22 is connected to a signal end of the trip circuit 30, the second voltage detecting unit 22 is configured to detect voltage signals of the ground line E and the live line L, and outputs a second voltage detection signal, a first signal end of the third voltage detection unit 23 is connected with the zero line N, a second signal end of the third voltage detection unit 23 is connected with the live line L, a signal output end of the third voltage detection unit 23 and a signal end of the trip circuit 30 are connected with the third voltage detection unit 23 for detecting voltage signals of the zero line N and the live line L and outputting a third voltage detection signal, and the trip circuit 30 judges whether the ground line E of the external power socket is bad or missing according to the first voltage detection signal, the second voltage detection signal and the third voltage detection signal, and further correspondingly controls the trip switch 40 to be turned on or turned off.
Further, as shown in fig. 5, each of the first voltage detecting unit 21, the second voltage detecting unit 22 and the third voltage detecting unit 23 includes a first resistor R1 and a second resistor R2, a first end of the first resistor R1 is a first signal end, a first end of the second resistor R2 is a second signal end, and a second end of the first resistor R1 and a second end of the second resistor R2 are connected and are signal output ends of the voltage detecting units.
Specifically, the first voltage detection unit 21, the second voltage detection unit 22, and the third voltage detection unit 23 respectively perform voltage division sampling on voltages between the ground line E, the live line L, and the zero line N through voltage division resistors, and respectively output a first voltage detection signal, a second voltage detection signal, and a third voltage detection signal to the trip circuit 30, so that the trip circuit 30 determines whether the ground line E of the external power socket is bad or missing according to the voltage detection signals.
In an embodiment, the plug 110 of the electric water heater further includes a switch selecting unit 60, as shown in fig. 6, a first signal input end of the switch selecting unit 60 is connected to a signal output end of the first voltage detecting unit 21, a second signal input end of the switch selecting unit 60 is connected to a signal output end of the second voltage detecting unit 22, a third signal input end of the switch selecting unit 60 is connected to a signal output end of the third voltage detecting unit 23, a signal output end of the switch selecting unit 60 is connected to a signal end of the trip circuit 30, and a controlled end of the switch selecting unit 60 is connected to the control of the trip circuit 30;
the switch selecting unit 60 is configured to receive a switch selection signal of the trip circuit 30, and correspondingly connect the first signal input terminal, the second signal input terminal, and the third signal input terminal of the switch selecting unit 60 to the signal output terminals according to the switch selection signal, so as to output the first voltage detection signal, the second voltage detection signal, and the third voltage detection signal to the trip circuit 30.
Specifically, in order to avoid mutual interference between the voltage detection signals, the trip circuit 30 may output different control signals to the switch selection signal, so that the output end of the switch selection signal is respectively communicated with the first signal input end, the second signal input end, and the third signal input end, thereby respectively obtaining the first voltage detection signal, the second voltage detection signal, and the third voltage detection signal.
In one embodiment, as shown in fig. 7, the switch selecting unit 60 includes a first switch 61, a second switch 62, and a third switch 63;
an input terminal of the first switch 61 is a first signal input terminal of the switch selection unit 60, an input terminal of the second switch 62 is a second signal input terminal of the switch selection unit 60, an input terminal of the third switch 63 is a third signal input terminal of the switch selection unit 60, an output terminal of the first switch 61, an output terminal of the second switch 62, and an output terminal of the third switch 63 are interconnected, and a connection node thereof is a signal output terminal of the switch selection unit 60.
In this embodiment, the first switch 61, the second switch 62 and the third switch 63 may be transistors, field effect transistors, etc., output terminals of the first switch 61, the second switch 62 and the third switch 63 are interconnected, and are turned on and off according to a signal output by the trip circuit 30, so as to output the first voltage detection signal, the second voltage detection signal and the third voltage detection signal to the trip circuit 30, preferably, in order to reduce signal interference, the first switch 61, the second switch 62 and the third switch 63 are not turned on at the same time.
In an embodiment, the trip circuit 30 is an MCU, and the trip circuit 30 correspondingly controls the trip switch 40 to operate according to the received ground detection signal and the leakage detection signal and the internal program, so as to improve the electrical safety of the user.
As shown in fig. 8, the present invention further provides an electric water heater, which includes the electric water heater plug 110, the body 200, the power cord 100 and the connector 120 described in the above embodiments, and the specific structure of the electric water heater plug 110 refers to the above embodiments, and since the electric water heater adopts all the technical solutions of all the above embodiments, all the beneficial effects brought by the technical solutions of the above embodiments are at least provided, which are not repeated herein. The power cord 100 is connected to the plug 110 of the electric water heater and the connector 120 for connecting the body 200.
Specifically, the plug 110 of the electric water heater is a device that the electric water heater is electrically connected with an external power socket in a matching manner, and has the functions of power connection, power disconnection, zero-fire leakage protection and grounding protection. The power cord 100 is used to electrically connect the plug 110 of the electric water heater with the connector 120. The connector 120 is used for electrical connection between the power cord 100 and the body 200.
As shown in fig. 8 and 9, in one embodiment, a liner 201 and a heater 202 are disposed in the body 200. A thermostat 300 and a thermal cut-out 400 are also connected between the connector 120 and the body 200.
Specifically, the inner container in the body 200 is a positive displacement device, and can be used for storing water. The heater 202 provided in the body 200 can be used to heat the water stored in the inner container 201. The thermal cut-out 400 may be connected to the live line L and the neutral line N of the power line 100, and the thermal cut-out 400 may perform power-off protection of the heater at a temperature set by a user. The thermostat 300 may be connected between the thermal cut-off 400 and the body 200, and the thermostat 300 may automatically connect or disconnect the heater to or from the external power source according to a temperature set by a user.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. An electrical water heater plug, comprising:
the three-pole pin is used for being plugged with an external power socket;
the tripping switch is connected with the three-pole pin so as to connect and disconnect a zero line, a live line and a ground line which are connected with a power supply;
the ground wire detection unit is arranged corresponding to the zero line, the live wire and the ground wire and is used for detecting whether the ground wire of the external power socket is bad or missing or not and outputting a ground wire detection signal;
and the tripping circuit is used for receiving the ground wire detection signal and controlling the tripping switch to be switched off when the ground wire of the external power socket is poor or missing.
2. The electrical water heater plug of claim 1, further comprising:
the leakage detection unit is used for detecting whether the zero line or the live wire leaks electricity or not and outputting a leakage detection signal to the tripping circuit so that the tripping circuit controls the tripping switch to be switched off according to the leakage detection signal.
3. The plug for an electric water heater of claim 1, wherein the trip switch comprises:
a three-pole linked switch, one end of the three-pole linked switch is connected with the three-pole pin, the other end of the three-pole linked switch is respectively connected with the zero line, the live line and the ground wire,
the control end of the tripping mechanism is connected with the controlled end of the three-pole linked switch, the signal end of the tripping mechanism is connected with the signal end of the tripping circuit, and the tripping mechanism is used for receiving a tripping instruction output by the tripping circuit when the ground wire of the external power socket is poor or is lost so as to control the three-pole linked switch to be disconnected.
4. The plug for an electric water heater of claim 1, wherein the ground wire detecting unit comprises:
the first voltage detection unit is used for detecting voltage signals of the ground wire and the zero line and outputting a first voltage detection signal;
a first signal end of the second voltage detection unit is connected with the ground wire, a second signal end of the second voltage detection unit is connected with the live wire, a signal output end of the second voltage detection unit is connected with a signal end of the tripping circuit, and the second voltage detection unit is used for detecting voltage signals of the ground wire and the live wire and outputting a second voltage detection signal;
and the signal output end of the third voltage detection unit is connected with the signal end of the tripping circuit, and the third voltage detection unit is used for detecting the voltage signals of the zero line and the live line and outputting a third voltage detection signal.
5. The plug of electric water heater according to claim 4, wherein the first voltage detecting unit, the second voltage detecting unit and the third voltage detecting unit each comprise a first resistor and a second resistor, a first end of the first resistor is the first signal terminal, a first end of the second resistor is the second signal terminal, and a second end of the first resistor and a second end of the second resistor are connected and are signal output terminals of the voltage detecting unit.
6. The electrical water heater plug of claim 5, further comprising:
a first signal input end of the switch selection unit is connected with a signal output end of the first voltage detection unit, a second signal input end of the switch selection unit is connected with a signal output end of the second voltage detection unit, a third signal input end of the switch selection unit is connected with a signal output end of the third voltage detection unit, a signal output end of the switch selection unit is connected with a signal end of the tripping circuit, and a controlled end of the switch selection unit is connected with the control of the tripping circuit;
the switch selection unit is used for receiving a switch selection signal of a trip circuit, and respectively communicating a first signal input end, a second signal input end and a third signal input end of the switch selection unit with a signal output end according to the switch selection signal, so as to respectively output a first voltage detection signal, a second voltage detection signal and a third voltage detection signal to the trip circuit.
7. The plug for an electric water heater of claim 6, wherein the switch selection unit includes a first switch, a second switch and a third switch;
the input end of the first switch is the first signal input end of the switch selection unit, the input end of the second switch is the second signal input end of the switch selection unit, the input end of the third switch is the third signal input end of the switch selection unit, the output end of the first switch, the output end of the second switch and the output end of the third switch are interconnected, and the connection node of the first switch, the output end of the second switch and the output end of the third switch is the signal output end of the switch selection unit.
8. The plug for an electric water heater of claim 2, wherein the leakage detecting unit is an electromagnetic coil.
9. An electric water heater, comprising:
the electrical water heater plug of any one of claims 1-8;
a body;
the power cord is respectively connected with the plug of the electric water heater and the connector, and the connector is used for connecting the body.
10. The electric water heater according to claim 9, wherein the body is provided with an inner container and a heater, and a temperature controller and a thermal circuit breaker are connected between the connector and the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020985881.8U CN212323349U (en) | 2020-06-01 | 2020-06-01 | Electric water heater plug and electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020985881.8U CN212323349U (en) | 2020-06-01 | 2020-06-01 | Electric water heater plug and electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212323349U true CN212323349U (en) | 2021-01-08 |
Family
ID=74026635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020985881.8U Active CN212323349U (en) | 2020-06-01 | 2020-06-01 | Electric water heater plug and electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212323349U (en) |
-
2020
- 2020-06-01 CN CN202020985881.8U patent/CN212323349U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8472155B2 (en) | Leakage detection protective circuit | |
| CN108790928B (en) | Charging gun for electric automobile using standard power supply socket | |
| CN108933427B (en) | Electric water heater and protection device thereof | |
| CN1097864C (en) | Socket | |
| US8129863B2 (en) | Connection apparatus for parallel running generators | |
| CN212323349U (en) | Electric water heater plug and electric water heater | |
| CN108011256B (en) | Leakage protection plug and electric water heater | |
| CN108981181B (en) | Electric water heater and heating control device and method thereof | |
| CN206353643U (en) | Leakage protecting plug and electric heater | |
| CN112531643B (en) | User cold ground wire detection circuit and electrical equipment using same | |
| CN212366532U (en) | Protection device and distribution box with same | |
| CN204597627U (en) | PLC controls duplicate supply and generator automatic switching device | |
| WO2014155336A2 (en) | Household appliance with a safety circuit | |
| CN209960772U (en) | Electric water heater with water outlet and power off functions | |
| CN201541113U (en) | Controller capable of automatic electricity restriction | |
| CN213990145U (en) | Safe circuit and intelligent device for generating ground current | |
| CN102377164B (en) | Energy-efficient leakage detection protection circuit | |
| CN213460346U (en) | Power connector with temperature control protection | |
| CN217469746U (en) | Low-power consumption circuit | |
| CN218446491U (en) | Control circuit of electric hot-water bag | |
| CN220421423U (en) | Three-phase four-wire system neutral line broken wire detection protection circuit | |
| CN220457127U (en) | Intelligent distribution box | |
| CN220606098U (en) | Electric heating circuit and R290 heat pump | |
| CN2279724Y (en) | Leakage breaker with zero line detection function | |
| CN220857630U (en) | Power supply access circuit and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |