CN203456846U - Water heater and earth wire detection device for water heater - Google Patents
Water heater and earth wire detection device for water heater Download PDFInfo
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- CN203456846U CN203456846U CN201320542428.XU CN201320542428U CN203456846U CN 203456846 U CN203456846 U CN 203456846U CN 201320542428 U CN201320542428 U CN 201320542428U CN 203456846 U CN203456846 U CN 203456846U
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Abstract
The utility model discloses a water heater and an earth wire detection device for the water heater. The earth wire detection device for the water heater includes an earth wire detector which detects the grounding condition of the earth wire of the water heater and generates a detection signal, a prompting device, and a processor which is connected with the earth wire detector and the prompting device respectively, wherein the processor, in case of any detected signal abnormality, controls the water heater to stop heating, and gives prompts through the prompting device. According to the earth wire detection device for the water heater, whether the earth wire of the water heater is in good contact or not and whether the phase conductors and the neutral wire are in reverse connection or not can be detected through the earth wire detector, and the earth wire loop (that is external current added to the earth wire loop in the detection of the earth wire contact condition) can be cut off when the water heater is used by a user, so that personal safety of the user is guaranteed; and at the same time, the earth wire detection device can prompt the user in case of any detected signal abnormality. The earth wire detection device for the water heater is low in cost, high in safety performance and convenient for production, and can meet user's demands.
Description
Technical field
The utility model relates to technical field of water heaters, particularly a kind of grounding wire detection device for water heater and a kind of water heater with this grounding wire detection device.
Background technology
Along with the continuous lifting of people's living standard, people more and more pursue safe and comfortable bathe surrounding.For meeting these demands, not only the power of electric heater is done larger and larger, and safety requirements is also more and more higher.At present, electric heater is all the tightening security property of mode that adopts the earthing of casing substantially.If imperfect earth, will leak electricity, in this case leakage current by human body to form loop, this is very dangerous concerning user.
Existing electric heater has earth wire charged testing device, and its inner bag (ground wire) keeps insulation with shell, shell and wall connecting, and between inner bag and the outer earth's crust, going here and there a resistance and a neon bulb, the resistance in this device plays dividing potential drop.When ground wire electrification, inner bag forms loop by neon bulb and body of wall like this, and loop current flows through neon bulb, makes neon bulb luminous, to point out user now ground wire electrification.
But, existing electric heater does not detect ground wire and whether contacts good device, cause user cannot know whether ground wire contacts well, there is in use potential safety hazard, reason is, when ground wire contacts when good, even ground wire electrification, electric current also can flow into the earth, and now user's use is safe, and when ground wire electrification and loose contact, will leak electricity, if user uses electric heater at this moment, leakage current will form loop by human body and ground, user's personal safety is caused to very large threat, therefore can not meet user's demand.
Utility model content
The purpose of this utility model is intended to solve at least to a certain extent above-mentioned technical problem.
For this reason, an object of the present utility model is to propose a kind of grounding wire detection device for water heater, and whether the ground wire that this grounding wire detection device can detect water heater contacts well, and its cost is low, safe, meets user's demand.
Another object of the present utility model is to propose a kind of water heater.
For achieving the above object, the utility model has proposed a kind of grounding wire detection device for water heater on the one hand, comprising: detect the Grounding of water heater ground wire and generate the earth wire detector of detection signal; Prompting device; And processor, described processor is connected with described earth wire detector and described prompting device respectively, and wherein, described processor is controlled described water heater and is stopped heating when described detection signal is abnormal, and points out by described prompting device.
According to the grounding wire detection device for water heater the utility model proposes, whether the ground wire that can detect water heater by earth wire detector contacts good and when detection signal is abnormal, points out user, and its cost is low, safe, meet user's demand, and be convenient to produce.
Preferably, described processor can be single-chip microcomputer.
Further, described earth wire detector comprises control switch, the first detecting unit and the second detecting unit, wherein, the first end of described control switch is connected with described ground wire, the second end of described control switch is connected with the second detecting unit with described the first detecting unit, the control end of described control switch is connected with described processor, and described processor, when described water heater energising, is controlled described control switch and connected; Described the first detecting unit and the second detecting unit are according to the Grounding output low and high level signal of ground wire.
Further, the described grounding wire detection device for water heater also comprises: discharge detector, described discharge detector is connected with described processor, described discharge detector detects the water-flow signal of described water heater, and production burst signal, described processor is controlled described control switch according to described pulse signal and is turn-offed.
Further, described the first detecting unit further comprises: the first electric capacity, and one end of described the first electric capacity is connected with described processor, the other end ground connection of described the first electric capacity; The first resistance, one end of described the first resistance is connected with one end of described the first electric capacity; The second resistance, one end of described the second resistance is connected with the other end of described the first resistance, and the other end of described the second resistance is connected with the first reference power source; The first optocoupler, the 4th end ground connection of described the first optocoupler, the 3rd end of described the first optocoupler is connected with one end of described the second resistance; The first voltage stabilizing didoe, the negative electrode of described the first voltage stabilizing didoe is connected with phase line with the first end of described the first optocoupler respectively, and the anode of described the first voltage stabilizing didoe is connected with the second end of described the first optocoupler; The first electrochemical capacitor, described the first electrochemical capacitor and described the first voltage stabilizing didoe are connected in parallel, the positive terminal of described the first electrochemical capacitor is connected with the negative electrode of described the first voltage stabilizing didoe, and the negative pole end of described the first electrochemical capacitor is connected with the anode of described the first voltage stabilizing didoe; The 3rd resistance and first diode of mutually connecting, one end of described the 3rd resistance is connected with the negative pole end of described the first electrochemical capacitor, the other end of described the 3rd resistance is connected with the anode of described the first diode, and the negative electrode of described the first diode is connected with described the second detecting unit with the second end of described control switch respectively.
Further, described the second detecting unit further comprises: the second electric capacity, and one end of described the second electric capacity is connected with described processor, the other end ground connection of described the second electric capacity; The 4th resistance, one end of described the 4th resistance is connected with one end of described the second electric capacity; The 5th resistance, one end of described the 5th resistance is connected with the other end of described the 4th resistance, and the other end of described the 5th resistance is connected with described the first reference power source; The second optocoupler, the 4th end ground connection of described the second optocoupler, the 3rd end of described the second optocoupler is connected with one end of described the 5th resistance; The second voltage stabilizing didoe, the negative electrode of described the second voltage stabilizing didoe is connected with phase line with the first end of described the second optocoupler respectively, and the anode of described the second voltage stabilizing didoe is connected with the second end of described the second optocoupler; The 6th resistance, one end of described the 6th resistance is connected with the negative electrode of described the second voltage stabilizing didoe; The second electrochemical capacitor, the positive terminal of described the second electrochemical capacitor is connected with the other end of described the 6th resistance, and the negative pole end of described the second electrochemical capacitor is connected with zero line with the anode of described the second voltage stabilizing didoe respectively; The second diode, the negative electrode of described the second diode is connected with the positive terminal of described the second electrochemical capacitor, and the anode of described the second diode is connected with the negative electrode of described the first diode with the second end of described control switch respectively.
Further, described control switch further comprises: the 7th resistance, and one end of described the 7th resistance is connected with described processor; The first triode, the base stage of described the first triode is connected with the other end of described the 7th resistance, the grounded emitter of described the first triode; The 3rd diode, the anode of described the 3rd diode is connected with the collector electrode of described the first triode, and the negative electrode of described the 3rd diode is connected with the second reference power source; The first relay, one end of described the first relay coil is connected with the anode of described the 3rd diode with the collector electrode of described the first triode respectively, the other end of described the first relay coil is connected with described the second reference power source, one end of described the first relay switch is connected with described ground wire, and the other end of described the first relay switch is connected with the second detecting unit with described the first detecting unit.
Further, described prompting device comprises: the first light-emitting diode and the second light-emitting diode, described the first light-emitting diode is connected with described processor respectively with the second light-emitting diode.
For achieving the above object, the utility model has also proposed a kind of water heater on the other hand, and this water heater comprises the above-mentioned grounding wire detection device for water heater.
According to the water heater the utility model proposes, whether the ground wire that can detect water heater contacts well, whether phase line and the zero line that can detect water heater connect instead, can also when user uses water heater, cut off earth loop (be and detect ground wire contact situation, the external world joins the electric current of earth loop), guarantee user's personal safety, when detection signal is abnormal, point out user, its cost is low, safe simultaneously, meet user's demand, and be convenient to produce.
The aspect that the utility model is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the utility model and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 is according to the block diagram of the grounding wire detection device for water heater of the utility model embodiment; And
Fig. 2 is according to the structural representation of the grounding wire detection device for water heater of an embodiment of the utility model.
Reference numeral:
Earth wire detector 10, prompting device 20, processor 30, single-chip microcomputer IC, heater 40, discharge detector 50, the first detecting units 101, the second detecting unit 102, control switch 103, the first end K1 of control switch 103, the second end K2 and control end K3, ground wire PE, phase line L, zero line N, the first capacitor C 10, the first resistance R 10, the second resistance R 11, the 3rd resistance R 12, the first optocoupler U1, the first voltage stabilizing didoe ZD10, the first electrochemical capacitor EC10, the first diode D10, the second capacitor C 11, the 4th resistance R 13, the 5th resistance R 14, the 6th resistance R 15, the second optocoupler U2, the second voltage stabilizing didoe ZD11, the second electrochemical capacitor EC11, the second diode D11, the 7th resistance R 16, the first triode Q10, the 3rd diode D12, the first relay R Y10, the first LED 20, the second LED 21, the 8th resistance R 21, the 9th resistance R 22, the second triode Q40, the second relay R LY40, the 3rd relay R LY41, water flow sensor CON50.
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.
In description of the present utility model, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be to be directly connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
With reference to description and accompanying drawing below, by these and other aspects of clear embodiment of the present utility model.In these descriptions and accompanying drawing, specifically disclose some specific implementations in embodiment of the present utility model, represent to implement some modes of the principle of embodiment of the present utility model, but should be appreciated that the scope of embodiment of the present utility model is not limited.On the contrary, embodiment of the present utility model comprises spirit and all changes within the scope of intension, modification and the equivalent that falls into additional claims.
The water heater that proposes according to the utility model embodiment is described with reference to the accompanying drawings and for the grounding wire detection device of water heater.
As shown in Figure 1, the grounding wire detection device for water heater according to the utility model embodiment, comprising: earth wire detector 10, prompting device 20 and processor 30.
In the utility model, earth wire detector 10 is for detection of the Grounding of water heater ground wire and generate detection signal; Processor 30 is connected with earth wire detector 10 and prompting device 20 respectively, and wherein, processor 30 stops heating at the abnormal time control heat water producer of detection signal, and points out by prompting device 30.
Whether the ground wire that the grounding wire detection device for water heater of the present utility model can detect water heater by earth wire detector 10 contacts well and points out when detection signal is abnormal user, its cost is low, safe, meet user's demand, and be convenient to produce.
Preferably, in an embodiment of the present utility model, as shown in Figure 2, processor 30 can be single-chip microcomputer IC.
Further, in an embodiment of the present utility model, as shown in Figure 2, earth wire detector 10 comprises the first detecting unit 101, the second detecting unit 102 and control switch 103, and wherein, the first end K1 of control switch 103 is connected with ground wire PE, the second end K2 of control switch 103 is connected with the second detecting unit 102 with the first detecting unit 101, the control end K3 of control switch 103 is connected with processor 30, when processor 30 is switched at water heater, controls control switch 103 and connects; The first detecting unit 101 and the second detecting unit 102 are according to the Grounding output low and high level signal of ground wire PE.
Further, in an embodiment of the present utility model, as shown in Figure 2, the first detecting unit 101 further comprises: the first capacitor C 10, the first resistance R 10, the second resistance R 11, the 3rd resistance R 12, the first optocoupler U1, the first voltage stabilizing didoe ZD10, the first electrochemical capacitor EC10 and the first diode D10.Wherein, one end of the first capacitor C 10 is connected with the P44/RXD pin of processor 30, the other end ground connection of the first capacitor C 10; One end of the first resistance R 10 is connected with one end of the first capacitor C 10; One end of the second resistance R 11 is connected with the other end of the first resistance R 10, and the other end of the second resistance R 11 is connected with the first reference power source; The 4th end ground connection of the first optocoupler U1, the 3rd end of the first optocoupler U1 is connected with one end of the second resistance R 11; The negative electrode of the first voltage stabilizing didoe ZD10 is connected with phase line L with the first end of the first optocoupler U1 respectively, and the anode of the first voltage stabilizing didoe ZD10 is connected with the second end of the first optocoupler U1; The first electrochemical capacitor EC10 and the first voltage stabilizing didoe ZD10 are connected in parallel, and the positive terminal of the first electrochemical capacitor EC10 is connected with the negative electrode of the first voltage stabilizing didoe ZD10, and the negative pole end of the first electrochemical capacitor EC10 is connected with the anode of the first voltage stabilizing didoe ZD10; The 3rd resistance R 12 and the first diode D10 connect mutually, the first diode D10 plays halfwave rectifier, one end of the 3rd resistance R 12 is connected with the negative pole end of the first electrochemical capacitor EC10, the other end of the 3rd resistance R 12 is connected with the anode of the first diode D10, and the negative electrode of the first diode D10 is connected with the second detecting unit 102 with the second end K2 of control switch 103 respectively.
Alternatively, the first detecting unit 101 can also carry out full-wave rectification to replace the halfwave rectifier of the first diode D10.
Further, in an embodiment of the present utility model, as shown in Figure 2, the second detecting unit 102 further comprises: the second capacitor C 11, the 4th resistance R 13, the 5th resistance R 14, the 6th resistance R 15, the second optocoupler U2, the second voltage stabilizing didoe ZD11, the second electrochemical capacitor EC11, the second diode D11.
Wherein, one end of the second capacitor C 11 is connected with the P43/TXD pin of processor 30, the other end ground connection of the second capacitor C 11; One end of the 4th resistance R 13 is connected with one end of the second capacitor C 11; One end of the 5th resistance R 14 is connected with the other end of the 4th resistance R 13, and the other end of the 5th resistance R 14 is connected with the first reference power source; The 4th end ground connection of the second optocoupler U2, the 3rd end of the second optocoupler U2 is connected with one end of the 5th resistance R 14; The negative electrode of the second voltage stabilizing didoe ZD11 is connected with phase line L with the first end of the second optocoupler U2 respectively, and the anode of the second voltage stabilizing didoe ZD11 is connected with the second end of the second optocoupler U2; One end of the 6th resistance R 15 is connected with the negative electrode of the second voltage stabilizing didoe ZD11; The second electrochemical capacitor EC11, the positive terminal of the second electrochemical capacitor EC11 is connected with the other end of the 6th resistance R 15, and the negative pole end of the second electrochemical capacitor EC11 is connected with zero line N with the anode of the second voltage stabilizing didoe ZD11 respectively; The negative electrode of the second diode D11 is connected with the positive terminal of the second electrochemical capacitor EC11, and the anode of the second diode D11 is connected with the negative electrode of the first diode D11 with the second end K2 of control switch 103 respectively.Wherein, of the present utility model, execute in example, the first reference power source can be+5V.
It should be noted that, the first voltage stabilizing didoe ZD10, the second voltage stabilizing didoe ZD11 are respectively used to stablize the input terminal voltage of the first optocoupler U1 and the second optocoupler U2, the first electrochemical capacitor EC10 and level and smooth (exchange and turn direct current) that the second electrochemical capacitor EC11 plays power supply, guarantee provides input voltage to the first optocoupler U1 and the second optocoupler U2 simultaneously when power-half cycle.The first optocoupler U1 and the second optocoupler U2 not only play a part the isolation (safety) of strong, weak electricity, also signal are passed to for example single-chip microcomputer IC of processor 30 simultaneously.
Further, in an embodiment of the present utility model, as shown in Figure 2, control switch 103 further comprises: the 7th resistance R 16, the first triode Q10, the 3rd diode D12, the first relay R Y10.Wherein, one end of the 7th resistance R 16 is connected with the P45 pin of processor 30; The base stage of the first triode Q10 is connected with the other end of the 7th resistance R 16, the grounded emitter of the first triode Q10, and the first triode Q10 plays switch; The anode of the 3rd diode D12 is connected with the collector electrode of the first triode Q10, and the negative electrode of the 3rd diode D12 is connected with the second reference power source; One end of the first relay R Y10 coil is connected with the anode of the 3rd diode D10 with the collector electrode of the first triode Q10 respectively, the other end of the first relay R Y10 coil is connected with the second reference power source, one end of the first relay R Y10 switch is connected with ground wire PE, the other end of the first relay R Y10 switch is connected with the second detecting unit 102 with the first detecting unit 101, and the first relay R Y10 is for connecting and cut off the loop of the first detecting unit 101 and the second detecting unit 102 and ground wire PE.Wherein, of the present utility model, execute in example, the second reference power source can be+12V.
Alternatively, the first relay R Y10 can also be connected to phase line L place.
Further, in an embodiment of the present utility model, as shown in Figure 2, prompting device 20 comprises: the first LED 20 and the second LED 21 are to carry out luminous prompting, and the first LED 20 is connected with P31/INTP2 pin with the P123 pin of processor 30 respectively with the second LED 21.
Alternatively, in an embodiment of the present utility model, prompting device 20 can also comprise the 8th resistance R 21 and the 9th resistance R 22, wherein, the 8th resistance R 21 and the first LED 20 are connected in series, and the 9th resistance R 22 and the second LED 21 are connected in series.Alternatively, prompting device 20 can also comprise other device, to carry out sound, light or other prompting.
In an embodiment of the present utility model, as shown in Figure 2, the operation principle of the above-mentioned grounding wire detection device for water heater is: when water heater is switched on, and the P45 pin of processor 30 output high level, the first relay R Y10 adhesive, connect with ground wire PE, if ground wire PE contact is good, phase line L will form loop with ground wire PE, the first optocoupler U1 conducting, output low level is to the P44/RXD pin of processor 30, and the second not conducting of optocoupler U2, exports high level to the P43/TXD pin of processor 30; If during ground wire PE loose contact, the first optocoupler U1 and the second not conducting of optocoupler U2, all output low level is to P44/RXD pin and the P43/TXD pin of processor 30; If phase line L and zero line N connect inverse time, the first not conducting of optocoupler U1, exports high level to the P44/RXD pin of processor 30, the second optocoupler U2 conducting, and output low level is to the P43/TXD pin of processor 30; Processor 30 is exported corresponding control signal to prompting device 20 according to the difference of detection signal by P123 pin and P31/INTP2 pin, to control the first LED 20 and the second LED 21, sends different light promptings.
Particularly, in an embodiment of the present utility model, if ground wire PE contact is good, the P123 pin of processor 30 and the equal output low level of P31/INTP2 pin, the first LED 20 and the second LED 21 Chang Liang; If ground wire PE loose contact, the P31/INTP2 pin interval 0.5 second output low and high level of processor 30, the second LED 21 is with the frequency scintillation of 1Hz, the P123 pin output low level of processor 30, the first LED 20 Chang Liang; If phase line L and zero line N connect instead, the P123 pin interval of processor 30 0.5 second output low and high level, the first LED 20 is with the frequency scintillation of 1Hz, the P31/INTP2 pin output low level of processor 30, the second LED 21 Chang Liang.
Further, in an embodiment of the present utility model, as shown in Figure 2, the above-mentioned grounding wire detection device for water heater also comprises heater 40, heater 40 is connected with the P40 pin of processor 30, when ground wire PE contacts when good, the P40 pin output high level of processor 30, the second triode Q40 conducting in heater 40, make the coil of the second relay R LY40 and the coil electricity of the 3rd relay R LY41, the switch contacts of the second relay R LY40 and the 3rd relay R LY41, thereby connect the power supply at heater two ends, make heater work, when ground wire PE loose contact, the P40 pin output low level of processor 30, the second triode Q40 in heater 40 closes, thus the second relay R LY40 coil and the 3rd relay R LY41 coil two ends no-voltage cut off the power supply at heater two ends, stop heating, to improve fail safe.Ground wire grounded when normal when detecting, heater 40 normal power supplies.Should be understood that, in embodiment of the present utility model, the second triode Q40 plays on-off action, and the second relay R LY40 and the 3rd relay R LY41 are used for connecting and the power supply that cuts off heater two ends.
Further, in an embodiment of the present utility model, as shown in Figure 2, the above-mentioned grounding wire detection device for water heater also comprises discharge detector 50, discharge detector 50 is connected with the P20/AN0 pin of processor 30, discharge detector 50 detects water heater and has or not water-flow signal, and production burst signal, and processor 30 is controlled control switch 103 according to pulse signal and turn-offed.In other words, discharge detector 50, for taking a decision as to whether the water stage,, when having water-flow signal, is the water stage; When non-water flow signal, it it is the non-water stage.Particularly, when having current, the water flow sensor CON50 in discharge detector 50 can export pulse train, and processor 30 is for example determined with non-water flow for single-chip microcomputer IC by this pulse signal being detected.
In an embodiment of the present utility model, when processor 30 detects the pulse signal of discharge detector 50 outputs, the P45 pin of processor 30 is by output low level, turn-off the first relay R Y10, to disconnect the loop between ground wire PE and phase line L, thereby guarantee that user, when using water heater, does not have impressed current on ground wire, can improve the fail safe of water heater, and the prompting state consistency when prompting state of prompting device 20 and non-water flow.It should be noted that, in an embodiment of the present utility model, water heater one energising, earth wire detector 10 just starts to detect whether ground wire PE contacts good and phase line L and whether zero line N connects instead, and discharge detector 50 just starts after 2 seconds to detect in water heater energising, should be understood that, the time of 2 seconds has enough been detected ground wire grounded situation, within 2 seconds, detect in real time afterwards current, therefore there will not be conflict.
In an embodiment of the present utility model, prompting device 30 is that the difference of the input signal of base area thread detector 10 is pointed out.Therefore,, when having current, cut off the first relay R Y10 in earth wire detector 10, the prompting state consistency when prompting state of prompting device 30 and non-water flow.But be not that while having current with non-water flow, prompting state is identical, but at times, its reason is, water heater can not unanimously maintain streamflow regime, be all with a period of time (having current), stops using a period of time (non-water flow).Particularly, at non-water flow, be that non-water is during the stage, if it is good that earth wire detector 10 detects ground wire PE contact, the first LED 20 and the second LED 21 Chang Liang, then enable water heater, say, having current is that water is during the stage, processor 30 turn-offs the first relay R Y10, and the first LED 20 keeps Chang Liang (consistent with non-water flow) with the second LED 21; When non-water flow, when if earth wire detector 10 detects ground wire PE loose contact, processor 30 turn-offs the first relay R Y10, the first LED 20 Chang Liang, the second LED 21 is with the frequency scintillation of 1Hz, now enabling water heater has current, the first LED 20 Chang Liang, and the second LED 21 is with the frequency scintillation of 1Hz.
According to the grounding wire detection device for water heater of the present utility model, whether the ground wire that can detect water heater by earth wire detector contacts well, whether phase line and the zero line that can detect water heater connect instead, can also when user uses water heater, cut off earth loop and (be the ground wire contact situation that detects, the external world joins the electric current of earth loop), guarantee user's personal safety, when detection signal is abnormal, point out user simultaneously, its cost is low, safe, meet user's demand, and be convenient to produce.
In addition, the utility model embodiment has also proposed a kind of water heater, comprise the above-mentioned grounding wire detection device for water heater, whether the ground wire that this water heater can detect water heater contacts well, whether phase line and the zero line that can detect water heater connect instead, can also when user uses water heater, cut off earth loop and (be the ground wire contact situation that detects, the external world joins the electric current of earth loop), guarantee user's personal safety, when detection signal is abnormal, point out user, its cost is low, safe simultaneously, meet user's demand, and be convenient to produce.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that not departing from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is by claims and be equal to and limit.
Claims (9)
1. for a grounding wire detection device for water heater, it is characterized in that, comprising:
Detect the Grounding of water heater ground wire and generate the earth wire detector of detection signal;
Prompting device; And
Processor, described processor is connected with described earth wire detector and described prompting device respectively, and wherein, described processor is controlled described water heater and is stopped heating when described detection signal is abnormal, and points out by described prompting device.
2. the grounding wire detection device for water heater as claimed in claim 1, is characterized in that, described processor is single-chip microcomputer.
3. the grounding wire detection device for water heater as claimed in claim 1, is characterized in that, described earth wire detector comprises control switch, the first detecting unit and the second detecting unit, wherein,
The first end of described control switch is connected with described ground wire, the second end of described control switch is connected with the second detecting unit with described the first detecting unit, the control end of described control switch is connected with described processor, described processor, when described water heater energising, is controlled described control switch and is connected;
Described the first detecting unit and the second detecting unit are according to the Grounding output low and high level signal of ground wire.
4. the grounding wire detection device for water heater as claimed in claim 3, is characterized in that, also comprises:
Discharge detector, described discharge detector is connected with described processor, and described discharge detector detects the water-flow signal of described water heater, and production burst signal, and described processor is controlled described control switch according to described pulse signal and is turn-offed.
5. the grounding wire detection device for water heater as claimed in claim 3, is characterized in that, described the first detecting unit further comprises:
The first electric capacity, one end of described the first electric capacity is connected with described processor, the other end ground connection of described the first electric capacity;
The first resistance, one end of described the first resistance is connected with one end of described the first electric capacity;
The second resistance, one end of described the second resistance is connected with the other end of described the first resistance, and the other end of described the second resistance is connected with the first reference power source;
The first optocoupler, the 4th end ground connection of described the first optocoupler, the 3rd end of described the first optocoupler is connected with one end of described the second resistance;
The first voltage stabilizing didoe, the negative electrode of described the first voltage stabilizing didoe is connected with phase line with the first end of described the first optocoupler respectively, and the anode of described the first voltage stabilizing didoe is connected with the second end of described the first optocoupler;
The first electrochemical capacitor, described the first electrochemical capacitor and described the first voltage stabilizing didoe are connected in parallel, the positive terminal of described the first electrochemical capacitor is connected with the negative electrode of described the first voltage stabilizing didoe, and the negative pole end of described the first electrochemical capacitor is connected with the anode of described the first voltage stabilizing didoe;
The 3rd resistance and first diode of mutually connecting, one end of described the 3rd resistance is connected with the negative pole end of described the first electrochemical capacitor, the other end of described the 3rd resistance is connected with the anode of described the first diode, and the negative electrode of described the first diode is connected with described the second detecting unit with the second end of described control switch respectively.
6. the grounding wire detection device for water heater as claimed in claim 5, is characterized in that, described the second detecting unit further comprises:
The second electric capacity, one end of described the second electric capacity is connected with described processor, the other end ground connection of described the second electric capacity;
The 4th resistance, one end of described the 4th resistance is connected with one end of described the second electric capacity;
The 5th resistance, one end of described the 5th resistance is connected with the other end of described the 4th resistance, and the other end of described the 5th resistance is connected with described the first reference power source;
The second optocoupler, the 4th end ground connection of described the second optocoupler, the 3rd end of described the second optocoupler is connected with one end of described the 5th resistance;
The second voltage stabilizing didoe, the negative electrode of described the second voltage stabilizing didoe is connected with phase line with the first end of described the second optocoupler respectively, and the anode of described the second voltage stabilizing didoe is connected with the second end of described the second optocoupler;
The 6th resistance, one end of described the 6th resistance is connected with the negative electrode of described the second voltage stabilizing didoe;
The second electrochemical capacitor, the positive terminal of described the second electrochemical capacitor is connected with the other end of described the 6th resistance, and the negative pole end of described the second electrochemical capacitor is connected with zero line with the anode of described the second voltage stabilizing didoe respectively;
The second diode, the negative electrode of described the second diode is connected with the positive terminal of described the second electrochemical capacitor, and the anode of described the second diode is connected with the negative electrode of described the first diode with the second end of described control switch respectively.
7. the grounding wire detection device for water heater as described in claim 3-6 any one, is characterized in that, described control switch further comprises:
The 7th resistance, one end of described the 7th resistance is connected with described processor;
The first triode, the base stage of described the first triode is connected with the other end of described the 7th resistance, the grounded emitter of described the first triode;
The 3rd diode, the anode of described the 3rd diode is connected with the collector electrode of described the first triode, and the negative electrode of described the 3rd diode is connected with the second reference power source;
The first relay, one end of described the first relay coil is connected with the anode of described the 3rd diode with the collector electrode of described the first triode respectively, the other end of described the first relay coil is connected with described the second reference power source, one end of described the first relay switch is connected with described ground wire, and the other end of described the first relay switch is connected with the second detecting unit with described the first detecting unit.
8. the grounding wire detection device for water heater as claimed in claim 1, is characterized in that, described prompting device comprises:
The first light-emitting diode and the second light-emitting diode, described the first light-emitting diode is connected with described processor respectively with the second light-emitting diode.
9. a water heater, is characterized in that, comprises the grounding wire detection device for water heater as described in claim 1-8 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320542428.XU CN203456846U (en) | 2013-09-02 | 2013-09-02 | Water heater and earth wire detection device for water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320542428.XU CN203456846U (en) | 2013-09-02 | 2013-09-02 | Water heater and earth wire detection device for water heater |
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| Publication Number | Publication Date |
|---|---|
| CN203456846U true CN203456846U (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320542428.XU Expired - Lifetime CN203456846U (en) | 2013-09-02 | 2013-09-02 | Water heater and earth wire detection device for water heater |
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| Country | Link |
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| CN (1) | CN203456846U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753030A (en) * | 2015-02-27 | 2015-07-01 | 张正怡 | Anti-electric shock protection system of electric water heater |
| CN110235005A (en) * | 2017-12-19 | 2019-09-13 | 马鞍山市明珠电子科技有限公司 | Electrical equipment and the method for detecting electrical appliance ground state |
| CN114113848A (en) * | 2021-11-24 | 2022-03-01 | 珠海格力电器股份有限公司 | Ground wire detection device, washing machine and ground wire detection method thereof |
-
2013
- 2013-09-02 CN CN201320542428.XU patent/CN203456846U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753030A (en) * | 2015-02-27 | 2015-07-01 | 张正怡 | Anti-electric shock protection system of electric water heater |
| CN110235005A (en) * | 2017-12-19 | 2019-09-13 | 马鞍山市明珠电子科技有限公司 | Electrical equipment and the method for detecting electrical appliance ground state |
| CN114113848A (en) * | 2021-11-24 | 2022-03-01 | 珠海格力电器股份有限公司 | Ground wire detection device, washing machine and ground wire detection method thereof |
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| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20220729 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. |
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| CX01 | Expiry of patent term |
Granted publication date: 20140226 |