CN206947926U - Gas heater and its protection device - Google Patents
Gas heater and its protection device Download PDFInfo
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- CN206947926U CN206947926U CN201720778845.2U CN201720778845U CN206947926U CN 206947926 U CN206947926 U CN 206947926U CN 201720778845 U CN201720778845 U CN 201720778845U CN 206947926 U CN206947926 U CN 206947926U
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Abstract
The utility model discloses a kind of gas heater and its protection device, the protection device includes：The three-pole gang operated switch being connected with three pole pins, to connect zero line, live wire and ground wire with disjunction access power supply；The first detection unit that corresponding zero line and live wire are set, for detecting the electric leakage signal of zero line or live wire；The second detection unit that corresponding ground wire is set, for examining geodesic charged signal；The electric leakage control chip being connected respectively with the first detection unit and the second detection unit, for the fiery earth leakage protective instruction of corresponding generation zero and earth wire charged protecting instruction；The trip circuit being connected with electric leakage control chip, for according to zero fiery earth leakage protective instruction or earth wire charged protecting instruction generation dropout instruction；The tripping mechanism being connected respectively with three-pole gang operated switch and trip circuit, for receiving and performing instruction of threading off, with by controlling three-pole gang operated switch to control zero line, live wire and ground wire to be in disjunction state, so that gas valve is closed automatically.
Description
Technical field
It the utility model is related to household electrical appliance technical field, the protection device and one kind of more particularly to a kind of gas heater
Gas heater.
Background technology
Gas heater has the advantages that heating is fast, easy to use.Although there is some gas heaters zero fire to leak at present
Electric protection function and earth wire charged protecting function, but can cause gas heater when the externally fed circuit exception of power line
Body is powered.If human body is in contact with gas heater body, the electric shock accidents of larger harm can be produced, therefore have must
This is made and targetedly improved.
Utility model content
The utility model is intended to one of technical problem at least solving in above-mentioned technology to a certain extent.
Therefore, a purpose of the present utility model is to propose a kind of protection device of gas heater, it can be improved
The security of gas heater.
Second purpose of the present utility model is to propose a kind of gas heater.
To reach above-mentioned purpose, the utility model proposes a kind of protection device of gas heater, the gas and hot water
Device includes power line and body, and the power line includes three pole pins, and three pole pin is inserted with grafting form and external power source
Seat is attached, and the body includes gas valve, and the protection device includes：Three-pole gang operated switch, the three-pole gang operated switch
It is connected with three pole pin with zero line, live wire and the ground wire of connection and disjunction access power supply；First detection unit, described first
Detection unit corresponds to the zero line and the live wire is set, and first detection unit is used to detect the zero line or the live wire
Electric leakage signal；Second detection unit, second detection unit correspond to the ground wire and set, and second detection unit is used for
Detect the charged signal of the ground wire；Leak electricity control chip, it is described electric leakage control chip respectively with first detection unit and
Second detection unit is connected, and the electric leakage control chip is used to be generated according to the electric leakage signal of the zero line or the live wire
Zero fiery earth leakage protective instruction, and earth wire charged protecting instruction is generated according to the charged signal of the ground wire；Trip circuit, it is described de-
Button circuit is connected with the electric leakage control chip, and the trip circuit is used to be instructed according to described zero fiery earth leakage protective or described
Tape electric protection instruction generation, which is threaded off, to be instructed；Tripping mechanism, the tripping mechanism respectively with the three-pole gang operated switch and described
Trip circuit is connected, and the tripping mechanism is used to receiving and performing the instruction of threading off, with by controlling the three pole linkage to open
Close and control zero line, the live wire and the ground wire to be in disjunction state, wherein, the gas valve is in the zero line, institute
State live wire and the ground wire is in closing automatically during disjunction state.
According to the protection device of gas heater of the present utility model, zero line or live wire are detected by the first detection unit
Electric leakage signal, geodesic charged signal is examined by the second detection unit, and by the control chip that leaks electricity according to zero line or live wire
The fiery earth leakage protective instruction of electric leakage signal generation zero, and earth wire charged protecting instruction is generated according to the charged signal of ground wire, entered
And thread off and instruct according to zero fiery earth leakage protective instruction or earth wire charged protecting instruction generation by trip circuit, and pass through dropout machine
Structure receives and performs dropout instruction, with by controlling three-pole gang operated switch to control zero line, live wire and ground wire to be in disjunction state,
So that gas valve is closed automatically, so as to effectively improve the security of gas heater.
In addition, according to the utility model proposes the protection device of gas heater can also have technology additional as follows
Feature：
Further, the protection device of described gas heater also includes：Zero fiery power-fail detection circuit, zero fire fall
Power detection circuit is used to detect the power-off signal between the zero line and the live wire；Zero fiery power-down actions circuit, zero fire
Power-down actions circuit is connected with described zero fiery power-fail detection circuit and the trip circuit respectively, the zero fiery power-down actions circuit
For being instructed according to the zero fiery power down protection of power-off signal generation between the zero line and the live wire, wherein, the electricity of threading off
Road is additionally operable to according to the described zero fiery power down protection instruction generation instruction of threading off.
Further, the protection device of described gas heater also includes：Upper electric triggers circuit, the upper electricity triggering electricity
Road is used to detect the power on signal between the zero line and the live wire；Upper electric actuating circuit, the upper electric actuating circuit and institute
State electric triggers circuit to be connected, the upper electric actuating circuit is used to generate upper electric action command according to the power on signal；Upper electricity
Actuating mechanism, the upper electric actuating mechanism are connected with the upper electric actuating circuit, and the upper electric actuating mechanism is used to receive and hold
The row upper electric action command, with by controlling the three-pole gang operated switch to control zero line, the live wire and the ground wire
It is in on-state.
Wherein, the electric leakage of the zero line or the live wire that the electric leakage control chip detects in first detection unit
When electric current is more than or equal to the first pre-set current value, the fiery earth leakage protective instruction of generation described zero.
Wherein, the electric current of the ground wire that the electric leakage control chip detect in second detection unit is more than or equal to the
During two pre-set current values, the earth wire charged protecting instruction is generated.
Wherein, it is pre- to be less than or equal to first for voltage of the described zero fiery power-down actions circuit between the zero line and the live wire
If described zero fiery power down protection instruction is generated during magnitude of voltage.
Wherein, the upper electric actuating circuit is used for the upper piezoelectric voltage of the electric triggers circuit detection described more than or equal to second
The upper electric action command is generated during preset voltage value.
To reach above-mentioned purpose, the utility model also proposed a kind of gas heater, and it includes above-mentioned gas and hot water
The protection device of device.
, can be effectively using the protection device of above-mentioned gas heater according to gas heater of the present utility model
Improve the security of gas heater.
Brief description of the drawings
Fig. 1 is the electrical schematic diagram according to the gas heater including protection device of the utility model one embodiment；
Fig. 2 is the electrical schematic diagram according to the power line of the utility model one embodiment.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
The gas heater of the utility model embodiment and its protection device described below in conjunction with the accompanying drawings.
As shown in figure 1, the gas heater of the utility model embodiment, which removes, includes the (not shown in figure 1) of protection device 100
Outside, power line 200 and the (not shown) of body 300 be may also include.As shown in figure 1, power line 200 may include three pole pins
210, three pole pins 210 can be single-phase three pole plate-inserting structure, be attached with grafting form and external power receptacle.Body 300
It may include gas valve 310, blower fan 320, controller 330, igniter (not shown), burning heater (not shown)
With shell 340.
Wherein, burning heater be combustion gas and air can be made to mix in some way and spray carry out heat water dress
Put.Gas valve 310 can be used for receive and perform controller 300 initiation open command or out code so that outer combustion gas with
Supply air line between burning heater is in corresponding opening or closed mode.Gas valve 310 may include magnetic valve,
It is closed automatically when the zero line, live wire and ground wire of gas heater are in disjunction state.
Blower fan 320 can be used for air intake and the air draft (supply of such as air and the discharge of flue gas) of gas heater, its power
Device can be alternating current generator (not shown).Alternating current generator can be supplied by the zero line L ends and live wire N-terminal of power line 200 for it
Electricity.
Controller 330 may include transformer 331, current rectifying and wave filtering circuit 332, microprocessor 333, control relay circuit
334 and relay 335, transformer 331 can be the transformer with electrical isolation, the zero line N-terminal of its input and power line 200
It is connected with live wire L ends, power supply is exported to current rectifying and wave filtering circuit 332 after transformer 331 is depressured.Current rectifying and wave filtering circuit 332
Alternating current after transformer 331 is depressured can be converted to after direct current to microprocessor 333 and control relay circuit 334
Power supply.Controller 30 by microprocessor 333 sends control instruction to control the opening and closing of gas valve 310, igniter
The air intake and air draft of igniting and blower fan 320.
For example, the control instruction of the transmittable shut-off open relay of microprocessor 333 or the control of closing relay refer to
Order.When microprocessor 333 sends the control instruction for disconnecting relay, control relay circuit 334 is receiving disconnection relay
Control instruction after control relay 335 disconnect, similarly control relay circuit 334 is receiving the control of closing relay
Control relay 335 closes after instruction.That is, control relay circuit 334 refers in the control for receiving disconnection relay
After the control instruction of order or closing relay, accordingly control relay 335 is opened or closed, and then can be switched on or switched off blower fan
320 power supply.
Igniter is can be according to the control instruction energy instantaneous ignition combustion gas that controller 330 is sent, and can stablize gas flame
Device.
The material of shell 340 can be metal material, in order to improve the security of gas heater, can be grounded shell 340.
Fig. 2 is the structural representation according to the protection device of the gas heater of the utility model embodiment.
As shown in Fig. 2 the protection device 100 of the gas heater of the utility model embodiment, including three-pole gang operated switch
110th, the first detection unit 120, the second detection unit 130, electric leakage control chip 140, trip circuit 150 and tripping mechanism 160.
Wherein, three-pole gang operated switch 110 is connected with three pole pins 210 with zero line N-terminal, the fire of connection and disjunction access power supply
Line L ends and ground wire E ends.First detection unit, 120 corresponding zero line N-terminal and live wire L end is set, and the first detection unit 120 is used to examine
Survey zero line N-terminal or the electric leakage signal at live wire L ends.Second detection unit, 130 corresponding ground wire E ends are set, and the second detection unit 130 is used
Charged signal in detection ground wire E ends.Leak electricity control chip 140 respectively with the first detection unit 120 and the second detection unit 130
It is connected, electric leakage control chip 140 is used to be instructed according to zero line N-terminal or zero fiery earth leakage protective of the electric leakage signal at live wire L ends generation, and
Earth wire charged protecting instruction is generated according to the charged signal at ground wire E ends.Trip circuit 150 is connected with electric leakage control chip 140, takes off
Circuit 150 is detained to be used to generate instruction of threading off according to zero fiery earth leakage protective instruction or the instruction of ground wire E ends electrization protection.Tripping mechanism
160 are connected with three-pole gang operated switch 110 and trip circuit 150 respectively, and tripping mechanism 160 is used to receiving and performing dropout instruction,
With by controlling three-pole gang operated switch 110 to control zero line N-terminal, live wire L ends and ground wire E ends to be in disjunction state, wherein, combustion gas
Valve is closed automatically when zero line N-terminal, live wire L ends and ground wire E ends are in disjunction state.
In one embodiment of the present utility model, three-level linked switch 110 is connected with three pole pins 210, with connect and
Disjunction accesses zero line N-terminal, live wire L ends and the ground wire E ends of power supply, and it may include the stationary contact being arranged on zero line N-terminal and move to touch
Point, the stationary contact being arranged on live wire L ends and movable contact, the stationary contact and movable contact being arranged on ground wire E ends, the above three is to touching
Point is linkage, and when connecting zero line N-terminal, live wire L ends and the ground wire E ends of access power supply, the ground wire E ends of its three pairs of contacts
Stationary contact is connected prior to zero line N-terminal with movable contact with corresponding stationary contact on live wire L ends with movable contact, in disjunction access power supply
When zero line N-terminal, live wire L ends and ground wire E ends, the stationary contact and movable contact at the ground wire E ends of its three pairs of contacts are after zero line N-terminal and fire
Corresponding stationary contact and movable contact disjunction on line L ends.
In one embodiment of the present utility model, as shown in Fig. 2 the first detection unit 120 may include to be set in zero line N
The first electromagnetic induction coil 121 and zero fiery electric leakage signal processing unit 122 on end and live wire L ends.Wherein, the first electromagnetic induction
Coil 121 can be the ZCT also cross zero line N-terminal and live wire L ends.Zero fiery electric leakage signal processing unit 122 respectively with
First electromagnetic induction coil 121 is connected with electric leakage control chip 140, is examined for receiving and handling the first electromagnetic induction coil 121
The zero line N-terminal of survey or the electric leakage signal at live wire L ends, and export and give electric leakage control chip 140.
In one embodiment of the present utility model, as shown in Fig. 2 the second detection unit 130 may include to be set in ground wire E
The second electromagnetic induction coil 131 and ground wire electrification signal processing unit 132 on end.Wherein, the second electromagnetic induction coil 131 can
For the ZCT also cross ground wire E ends.Ground wire electrification signal processing unit 132 respectively with the second electromagnetic induction coil
131 with electric leakage control chip 140 be connected, for receive and handle the second electromagnetic induction coil 131 detect ground wire E ends it is powered
Signal, and export and give electric leakage control chip 140.
Electric leakage control chip 140 receive the electric leakage signal of zero line N-terminal or live wire L ends, ground wire E ends charged signal
Afterwards, computing and judgement are carried out to zero line N-terminal or the electric leakage signal at live wire L ends, the charged signal at ground wire E ends.If the first detection
The zero line N-terminal or the leakage current at live wire L ends that unit 120 detects are more than or equal to the first pre-set current value Iln, then electric leakage control core
The fiery earth leakage protective instruction of the generation of piece 140 zero.If the electric current at the ground wire E ends of the second detection unit 130 detection is more than or equal to second
Pre-set current value Ie, the then control chip 140 that leaks electricity generate earth wire charged protecting instruction.Wherein, the first pre-set current value Iln is set
Scope can be 0~30mA, and preferred value is 5mA, 6mA, 10mA, 15mA.Second pre-set current value Ie setting ranges can be 0~
50mA, and preferred value is 15mA, 30mA.
Further, after the fiery earth leakage protective instruction of generation zero or generation earth wire charged protecting instruction, trip circuit 150
Thread off and instruct according to zero fiery earth leakage protective instruction or earth wire charged protecting instruction generation, and dropout instruction is sent to tripping mechanism
160, tripping mechanism 160 controls zero line N-terminal, live wire L when receiving dropout instruction by controlling three-pole gang operated switch 110
Three pairs of contacts at end and ground wire E ends are rapidly switched to disjunction state by on-state.Gas valve 310 in gas heater three
It is automatic to close when zero line N-terminal, live wire L ends and the three pairs of contacts at ground wire E ends of pole linked switch 110 are in disjunction state, to cut
Disconnected combustion gas output, now, gas heater enters the safe condition died, and so effectively can not only prevent combustion gas from letting out
Leakage damages to user, and can effectively prevent gas-operated thermal bath facility from continuing to heat, and saves the energy, additionally it is possible to effectively
Prevent user to be continuing with gas heater in the case where there is hot water, and then can effectively prevent user from producing danger of getting an electric shock
Danger.
In a specific embodiment of the present utility model, when zero line N-terminal and the electric leakage of live wire L ends occurs in gas heater
When, if the first detection unit 120 detects that the leakage current value at zero line N-terminal and live wire L ends is more than or equal to the first predetermined current
Value Iln, then the electric leakage signal of zero line N-terminal or live wire L ends is exported and give electric leakage control chip 140, the basis of control chip 140 of leaking electricity
Zero line N-terminal or the fiery earth leakage protective instruction of the electric leakage signal at live wire L ends generation zero, and export to trip circuit 150.Then, drive
Circuit 150 drive tripping mechanism 160 perform thread off instruct and then cause the zero line N-terminal of three-pole gang operated switch 110, live wire L ends and
Three pairs of contacts action at ground wire E ends, the zero line N-terminal of the final three-pole gang operated switch 110 for causing gas heater, live wire L ends and
Ground wire E ends rapidly switch to disjunction state by on-state, you can zero line N-terminal, the live wire L of cut-out three-pole gang operated switch 110
End and ground wire E ends.Meanwhile the zero line N-terminal in three-pole gang operated switch 110, live wire L ends and ground wire E ends be when being cut off, gas valve
310 automatic closings, to cut off combustion gas output.Now, gas heater is in the safe condition died.So as to which combustion can be realized
Zero fiery creepage protection function of gas water heater.Even if the externally fed circuit for power line 200 occur is abnormal, gas heater is also
The i.e. uncharged state of state in power-off isolation, thus, it is possible to effectively prevent user from Danger Electric shock risk, Jin Erke occurs
Effectively improve the security of gas heater.
In a specific embodiment of the present utility model, when gas heater occur ground wire E ends it is powered when, if
Two detection units 130 detect that the powered current value at ground wire E ends is more than or equal to the second pre-set current value Ie, then by ground wire E ends
Charged signal, which exports, gives electric leakage control chip 140, and electric leakage control chip 140 generates ground strip according to the charged signal at ground wire E ends
Electric protection instructs, and exports to trip circuit 150.Then, drive circuit 150 drive tripping mechanism 160 perform dropout instruct into
And cause zero line N-terminal, live wire L ends and the action of three pairs of contacts at ground wire E ends of three-pole gang operated switch 110, finally cause combustion gas heat
Zero line N-terminal, live wire L ends and the ground wire E ends of the three-pole gang operated switch 110 of hydrophone rapidly switch to disjunction shape by on-state
State, you can zero line N-terminal, live wire L ends and the ground wire E ends of cut-out three-pole gang operated switch 110.Meanwhile in three-pole gang operated switch 110
When zero line N-terminal, live wire L ends and ground wire E ends are cut off, gas valve 310 is closed automatically, to cut off combustion gas output.Now, combustion gas heat
Hydrophone is in the safe condition died, so as to realize the earth wire charged protecting function of gas heater.Even if there is electricity
The externally fed circuit of source line 200 is abnormal, and gas heater is also in powering off the i.e. uncharged state of isolation, thus
It can effectively prevent user from Danger Electric shock risk occurs, and then the security of gas heater can be effectively improved.
According to the protection device of the gas heater of the utility model embodiment, by the first detection unit detect zero line or
The electric leakage signal of live wire, geodesic charged signal is examined by the second detection unit, and by the control chip that leaks electricity according to zero line
Or the fiery earth leakage protective instruction of electric leakage signal generation zero of live wire, and earth wire charged protecting is generated according to the charged signal of ground wire and referred to
Order, and then by trip circuit according to zero fiery earth leakage protective instruction or earth wire charged protecting instruction generation dropout instruction, and pass through
Tripping mechanism receives and performs dropout instruction, with by controlling three-pole gang operated switch to control zero line, live wire and ground wire to be in point
Disconnected state, so that gas valve is closed automatically, so as to effectively improve the security of gas heater.
The gas heater of the utility model embodiment can not only have above-mentioned zero fiery creepage protection function and ground strip
Electric protection function, can also have on zero fiery power-down protection and zero fire and electrically connect function.
In one embodiment of the present utility model, as shown in Fig. 2 the protection device 100 of the utility model embodiment is also
It may include zero fiery 171 and zero fiery power-down actions circuit 172 of power-fail detection circuit.Zero fiery power-fail detection circuit 171 is used to detect zero
Power-off signal between line N-terminal and live wire L ends.Zero fiery power-down actions circuit 172 respectively with zero fiery power-fail detection circuit 171 and de-
Detain circuit 150 to be connected, zero fiery power-down actions circuit 172 is used for according to the power-off signal generation zero between zero line N-terminal and live wire L ends
Fiery power down protection instruction, wherein, trip circuit 150 is additionally operable to be threaded off according to zero fiery power down protection instruction generation and instructed.
In a specific embodiment of the present utility model, when operating voltage occur in the zero line N-terminal of water heater and live wire L ends
When moment declines, if zero fiery power-fail detection circuit 171 detects that the voltage Uln between zero line N-terminal and live wire L ends is less than or equal to
First preset voltage value Ulnd, then zero fiery power-fail detection circuit 171 export zero fiery power-off signal to zero fiery power-down actions circuit
172, zero fiery power-down actions circuit 172 generates zero fiery power down protection according to the power-off signal between zero line N-terminal and live wire L ends and referred to
Order.Trip circuit 150 is threaded off according to zero fiery power down protection instruction generation and instructed, and is exported to trip circuit 150.Then, drive
Circuit 150 drive tripping mechanism 160 perform thread off instruct and then cause the zero line N-terminal of three-pole gang operated switch 110, live wire L ends and
Three pairs of contacts action at ground wire E ends, the zero line N-terminal of the final three-pole gang operated switch 110 for causing gas heater, live wire L ends and
By on-state, rapidly (time may be less than being equal to 0.5s) is switched to disjunction state at ground wire E ends, you can the linkage of three poles of cut-out
Zero line N-terminal, live wire L ends and the ground wire E ends of switch 110.Meanwhile the zero line N-terminal in three-pole gang operated switch 110, live wire L ends and ground
When line E ends are cut off, gas valve 310 is closed automatically, to cut off combustion gas output.Now, gas heater is in what is died
Safe condition, so as to which zero fiery power-down protection of gas heater can be realized.Even in zero fiery earth leakage protective of power line 200
When function and earth wire charged protecting disabler, it is also possible that gas heater is in the safe condition died, effectively
Ground prevents user from Danger Electric shock risk occurs, and then, the security of gas heater can be effectively improved.Wherein, the first predeterminated voltage
Value Ulnd setting ranges can be 0~160V.
In one embodiment of the present utility model, as shown in Fig. 2 the protection device 100 of the utility model embodiment is also
Including upper electric triggers circuit 181, upper electric actuating circuit 182 and upper electric actuating mechanism 183.Upper electric triggers circuit 181 is used to detect
Power on signal between zero line N-terminal and live wire L ends.Upper electric actuating circuit 182 is connected with upper electric triggers circuit 181, upper electronic work
Circuit 182 is used to generate upper electric action command according to power on signal.Upper electric actuating mechanism 183 is connected with upper electric actuating circuit 182,
Upper electric actuating mechanism 183 is used to receive and perform electric action command, with by controlling three-pole gang operated switch 110 to control zero line N
End, live wire L ends and ground wire E ends are in on-state.
In a specific embodiment of the present utility model, when operating voltage occur in the zero line N-terminal of water heater and live wire L ends
When reaching normal working voltage from zero moment, if upper electric triggers circuit 181 detects the electricity between zero line N-terminal and live wire L ends
Pressure Uln is more than or equal to the second preset voltage value Ulnh, then upper electric triggers circuit 181 exports power on signal to upper electric actuating circuit
182, the upper electric upper electric action command of the output of actuating circuit 182, to drive upper electric actuating mechanism 183 to perform upper electric action command, with
It is final to cause combustion by controlling three-pole gang operated switch 110 to control zero line N-terminal, live wire L ends and three pairs of contacts at ground wire E ends to act
By disjunction state, rapidly (time can be at zero line N-terminal, live wire L ends and the ground wire E ends of the three-pole gang operated switch 110 of gas water heater
Less than or equal to 0.5s) it is switched on state, you can connect zero line N-terminal, live wire L ends and the ground wire E of three-pole gang operated switch 110
End.Function is electrically connected on zero fire of gas heater so as to realize, enables to gas heater without manual intervention
It is transferred to normal working condition.Wherein, the first preset voltage value Ulnh setting ranges can be 0~110V.
It should be noted that power line 200 may also include connection in addition to including three pole pins 210 and protection device 100
Device 220 and mains cord 230.Connector 220 is connected between mains cord 230 and gas heater, for realizing that power supply is soft
Electrical connection between line 230 and gas heater.Mains cord 230 is connected between protection device 100 and connector 220, is used
In realizing the electrical connection between protection device 100 and connector 220.
Based on above-described embodiment, the utility model also proposed a kind of gas heater.
The gas heater of the utility model embodiment, including the gas heater that the utility model above-described embodiment proposes
Protection device, its specific embodiment can refer to above-described embodiment, to avoid redundancy, will not be repeated here.
, can using the protection device of above-mentioned gas heater according to the gas heater of the utility model embodiment
Effectively improve security.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ",
The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on shown in the drawings
Orientation or position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicates or imply signified dress
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Limitation.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or two
More than, unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be
Mechanically connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be two
The connection of element internal or the interaction relationship of two elements.For the ordinary skill in the art, can basis
Concrete condition understands concrete meaning of the above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature
Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special
Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only
Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with
Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with
Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area
Technical staff the different embodiments or example and the feature of different embodiments or example described in this specification can be entered
Row combines and combination.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model
It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (8)
1. a kind of protection device of gas heater, it is characterised in that the gas heater includes power line and body, described
Power line includes three pole pins, and three pole pin is attached with grafting form and external power receptacle, and the body includes
Gas valve, the protection device include：
Three-pole gang operated switch, the three-pole gang operated switch is connected with three pole pin accesses the zero of power supply with connection and disjunction
Line, live wire and ground wire；
First detection unit, first detection unit corresponds to the zero line and the live wire is set, first detection unit
For detecting the electric leakage signal of the zero line or the live wire；
Second detection unit, second detection unit correspond to the ground wire and set, and second detection unit is used to detect institute
State the charged signal of ground wire；
Leak electricity control chip, it is described electric leakage control chip respectively with first detection unit and the second detection unit phase
Even, the electric leakage control chip is used to be instructed according to zero fiery earth leakage protective of the electric leakage signal of the zero line or live wire generation,
And earth wire charged protecting instruction is generated according to the charged signal of the ground wire；
Trip circuit, the trip circuit are connected with the electric leakage control chip, and the trip circuit is used for according to described zero fire
Instruction that earth leakage protective is instructed or earth wire charged protecting instruction generation is threaded off；
Tripping mechanism, the tripping mechanism are connected with the three-pole gang operated switch and the trip circuit respectively, the dropout machine
Structure is used to receiving and performing the instruction of threading off, with by controlling the three-pole gang operated switch to control the zero line, the live wire
Disjunction state is in the ground wire, wherein, the gas valve is in point in the zero line, the live wire and the ground wire
Closed automatically during disconnected state.
2. the protection device of gas heater according to claim 1, it is characterised in that also include：
Zero fiery power-fail detection circuit, the zero fiery power-fail detection circuit are used to detect the power down between the zero line and the live wire
Signal；
Zero fiery power-down actions circuit, the zero fiery power-down actions circuit respectively with described zero fiery power-fail detection circuit and the dropout
Circuit is connected, and the zero fiery power-down actions circuit is used for according to the fire of power-off signal generation zero between the zero line and the live wire
Power down protection instructs, wherein, the trip circuit is additionally operable to according to the described zero fiery power down protection instruction generation instruction of threading off.
3. the protection device of gas heater according to claim 1 or 2, it is characterised in that also include：
Upper electric triggers circuit, the upper electric triggers circuit are used to detect the power on signal between the zero line and the live wire；
Upper electric actuating circuit, the upper electric actuating circuit are connected with the upper electric triggers circuit, and the upper electric actuating circuit is used for
Upper electric action command is generated according to the power on signal；
Upper electric actuating mechanism, the upper electric actuating mechanism are connected with the upper electric actuating circuit, and the upper electric actuating mechanism is used for
Receive and perform the upper electric action command, with by control the three-pole gang operated switch control the zero line, the live wire and
The ground wire is in on-state.
4. the protection device of gas heater according to claim 3, it is characterised in that the electric leakage control chip is in institute
When the leakage current of the zero line or the live wire of stating the detection of the first detection unit is more than or equal to the first pre-set current value, generation
The zero fiery earth leakage protective instruction.
5. the protection device of gas heater according to claim 3, it is characterised in that the electric leakage control chip is in institute
When stating the electric current of the ground wire of the second detection unit detection and being more than or equal to the second pre-set current value, the ground wire electrification guarantor is generated
Finger shield makes.
6. the protection device of gas heater according to claim 3, it is characterised in that the zero fiery power-down actions circuit
Voltage between the zero line and the live wire, which is less than or equal to generate described zero fiery power down protection during the first preset voltage value, to be referred to
Order.
7. the protection device of gas heater according to claim 3, it is characterised in that the upper electric actuating circuit is used for
Electric action command described is generated when the upper piezoelectric voltage of electric triggers circuit detection described is more than or equal to the second preset voltage value.
8. a kind of gas heater, it is characterised in that including the gas heater according to any one of claim 1-7
Protection device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720778845.2U CN206947926U (en) | 2017-06-29 | 2017-06-29 | Gas heater and its protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720778845.2U CN206947926U (en) | 2017-06-29 | 2017-06-29 | Gas heater and its protection device |
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| CN206947926U true CN206947926U (en) | 2018-01-30 |
Family
ID=61366192
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| CN (1) | CN206947926U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380221A (en) * | 2018-12-27 | 2020-07-07 | 芜湖美的厨卫电器制造有限公司 | Gas water heater and control method thereof |
-
2017
- 2017-06-29 CN CN201720778845.2U patent/CN206947926U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380221A (en) * | 2018-12-27 | 2020-07-07 | 芜湖美的厨卫电器制造有限公司 | Gas water heater and control method thereof |
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Effective date of registration: 20230425 Address after: 241000 west side of 3 / F, No.5 office building, new energy and new materials gathering area, Fuzhou Road, Jiangbei District, Wuhu City, Anhui Province Patentee after: Wuhu Midea intelligent kitchen electricity Manufacturing Co.,Ltd. Address before: 241009 Wan Chun East Road, East Wuhu economic and Technological Development Zone, Wuhu, Anhui Patentee before: WUHU MIDEA KITCHEN AND BATH APPLIANCES MFG. Co.,Ltd. Patentee before: MIDEA GROUP Co.,Ltd. |
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