CN105042874A - Electric water heater and method for controlling electric water heater - Google Patents
Electric water heater and method for controlling electric water heater Download PDFInfo
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- CN105042874A CN105042874A CN201510459979.3A CN201510459979A CN105042874A CN 105042874 A CN105042874 A CN 105042874A CN 201510459979 A CN201510459979 A CN 201510459979A CN 105042874 A CN105042874 A CN 105042874A
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- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims description 134
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- 238000005485 electric heating Methods 0.000 abstract description 2
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Abstract
The invention discloses a method for controlling an electric water heater. The method includes the steps that the water outlet temperature change state detected by a temperature sensor in a hot water outlet pipe within the first preset time is acquired; and when the acquired water outlet temperature change state is a rising state, it is judged that the hot water outlet pipe is in a water outlet state, and a power supply of an electric heating element of the water heater is cut off. The invention further provides the electric water heater. According to the electric water heater and the method for controlling the electric water heater, the sensitivity is high and detection results are accurate; the electric water heater and the method for controlling the electric water heater are not affected by the water flow rate; the problem that the water outlet state cannot be detected when the water flow rate is small in the prior art is solved.
Description
Technical field
The present invention relates to technical field of water heaters, particularly relate to the control method of a kind of electric heater and electric heater.
Background technology
Conventional storage-type electric water heater is judged user's use water by flow sensor at present, simultaneously by judging that the heating tube that user's use water generally starts instant heating provides more hot water to user or the safety of guarantee user use procedure of cutting off the electricity supply later, but there is the problem starting threshold value in flow sensor, when using discharge to be less than the startup threshold value of flow sensor, this flow sensor cannot judge that user's uses water behavior.
Summary of the invention
The invention provides the control method of a kind of electric heater and electric heater, its main purpose is cannot detect the problem that electric heater goes out water state when solving less by discharge in prior art.
For achieving the above object, the invention provides a kind of control method of electric water heater, this control method of electric water heater comprises:
Obtain the leaving water temperature variable condition that the temperature sensor in hot water outlet pipe detects in the first Preset Time;
When the described leaving water temperature variable condition got is propradation, is judged as that described hot water outlet pipe is in out water state, disconnects the power supply of the electrical heating elements of described water heater.
Preferably, the step of the leaving water temperature variable condition that the temperature sensor in described acquisition hot water outlet pipe detects in the first Preset Time comprises:
The leaving water temperature that temperature sensor in hot water outlet pipe described in continuous acquisition detects in described first Preset Time;
According to continuous acquisition in described first Preset Time to described leaving water temperature judge its variable condition.
Preferably, described in be judged as that described hot water outlet pipe is in out water state, after disconnecting the step of the power supply of the electrical heating elements of described water heater, described control method of electric water heater also comprises:
Receive instant heating instruction;
The instant heating heating tube starting described water heater according to the described instant heating instruction received heats the hot water of described water heater courage inner top.
Preferably, described in be judged as that described hot water outlet pipe is in out water state, after disconnecting the step of the power supply of the electrical heating elements of described water heater, described control method of electric water heater also comprises:
Obtain the head temperature in described water heater courage;
When the head temperature in the described water heater courage got is lower than preset temperature, the hot water that the instant heating heating tube starting described water heater heats described water heater courage inner top reaches described preset temperature.
Preferably, after the step of the leaving water temperature variable condition that the temperature sensor in described acquisition hot water outlet pipe detects in the first Preset Time, described control method of electric water heater also comprises:
When the described leaving water temperature got is in decline state in described first Preset Time, obtain the variable condition of described water heater courage inner top temperature in the second Preset Time;
When the variable condition of the described head temperature got is for stopping declining, is judged as that described hot water outlet pipe stops water outlet, is communicated with the power supply of the electrical heating elements of described water heater.
In addition, for achieving the above object, the present invention also provides a kind of electric heater, and this electric heater comprises:
Leaving water temperature detection module, the leaving water temperature variable condition that the temperature sensor for obtaining in hot water outlet pipe detects in the first Preset Time;
Heating element heater control module, for when the described leaving water temperature variable condition got is propradation, is judged as that described hot water outlet pipe is in out water state, disconnects the power supply of the electrical heating elements of described water heater.
Preferably, described leaving water temperature detection module comprises:
Leaving water temperature collecting unit, for the leaving water temperature that the temperature sensor in hot water outlet pipe described in continuous acquisition detects in described first Preset Time;
Variations in temperature judging unit, for according in described first Preset Time continuous acquisition to described leaving water temperature judge its variable condition.
Preferably, described control device also comprises:
Head temperature detection module, for when the described leaving water temperature got is in decline state in described first Preset Time, obtains the variable condition of described water heater courage inner top temperature in the second Preset Time;
Described heating element heater control module also for when the variable condition of the described head temperature got is for stopping declining, is judged as that described hot water outlet pipe stops water outlet, is communicated with the power supply of the electrical heating elements of described water heater.
Preferably, described control device also comprises:
Instant heating command reception module, for receiving instant heating instruction;
First instant heating heating tube control module, the instant heating heating tube for starting described water heater according to the described instant heating instruction received heats the hot water of described water heater courage inner top.
Preferably, described control device also comprises:
Middle portion temperature detection module, for obtaining the head temperature in described water heater courage;
Second instant heating heating tube control module, for when the head temperature in the described water heater courage got is lower than preset temperature, the hot water that the instant heating heating tube starting described water heater heats described water heater courage inner top reaches described preset temperature.
The electric heater that the present invention proposes and control method of electric water heater, by set temperature sensor in the hot water outlet pipe of electric heater, Real-time Collection leaving water temperature, and judge that its variable condition in Preset Time is to judge whether user uses hot water, when being judged as that user brings into use hot water, cut off the power supply of electrical heating elements, temperature sensor is highly sensitive and testing result is accurate, not by the impact of discharge size, even if when the flow of user's water is less, also judge whether with water by variations in temperature, the problem that electric heater goes out water state cannot be detected when solving less by discharge in prior art.
Accompanying drawing explanation
Fig. 1 is the flow chart of control method of electric water heater first embodiment of the present invention;
Fig. 2 is the refinement schematic flow sheet of step S10 in Fig. 1;
Fig. 3 is the flow chart of control method of electric water heater second embodiment of the present invention;
Fig. 4 is the flow chart of control method of electric water heater of the present invention 3rd embodiment;
Fig. 5 is the flow chart of control method of electric water heater of the present invention 4th embodiment;
Fig. 6 is the high-level schematic functional block diagram of electric heater first embodiment of the present invention;
Fig. 7 is the refinement high-level schematic functional block diagram of leaving water temperature detection module in Fig. 6;
Fig. 8 is the high-level schematic functional block diagram of electric heater second embodiment of the present invention;
Fig. 9 is the high-level schematic functional block diagram of electric heater of the present invention 3rd embodiment;
Figure 10 is the high-level schematic functional block diagram of electric heater of the present invention 4th embodiment.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of control method of electric water heater.
With reference to the flow chart that Fig. 1, Fig. 1 are control method of electric water heater first embodiment of the present invention.
In a first embodiment, the method comprises:
Step S10, obtains the leaving water temperature variable condition that the temperature sensor in hot water outlet pipe detects in the first Preset Time;
The top of existing storage-type electric water heater generally in courage and middle part are respectively arranged with temperature sensor, and to detect the temperature at hot water top and middle part in courage, whether the hot water in water heater is heated to preset temperature is generally as the criterion with middle portion temperature.The present embodiment on the basis of existing technology, by arranging a temperature sensor to detect coolant-temperature gage in hot water outlet pipe, because the induction sensitivity of temperature sensor is high, judgement for flow is sensitive, accurately can judge that the user being less than below general flow sensor startup flow threshold uses water behavior.
With reference to shown in Fig. 2, step S10 comprises following refinement step:
Step S101, the leaving water temperature that the temperature sensor in hot water outlet pipe described in continuous acquisition detects in described first Preset Time;
In real time and detect coolant-temperature gage continuously, after water heater power supply is connected, temperature sensor in outlet pipe is started working, real-time collection leaving water temperature, such as each second or two seconds can gather a leaving water temperature, and the temperature value collected being uploaded to the processor of water heater, processor carries out record.
Step S102, according to continuous acquisition in described first Preset Time to described leaving water temperature judge its variable condition.
The temperature of hot water outlet pipe when not having hot water to flow through of water heater is lower, be generally normal temperature or a little more than normal temperature, when the hot water in water heater courage is in keeping warm mode, if user opens hot water water, have hot water to flow through, the temperature in hot water outlet pipe can rise at short notice fast, and the temperature sensor in hot water outlet pipe is at Real-time Collection leaving water temperature, when it rises at short notice fast, processor can according to continuous acquisition to leaving water temperature judge its variable condition.
Step S20, when the described leaving water temperature variable condition got is propradation, is judged as that described hot water outlet pipe is in out water state, disconnects the power supply of the electrical heating elements of described water heater.
Existing storage-type electric water heater structure is generally sealed outlet, and it is intake from top water outlet by bottom with water, and namely in its courage, the temperature decline process of hot water must be that first bottom temp declines, then in courage, temperature declines, and last top declines.
When user uses hot water, the hot water conditions in water heater courage and the hot water conditions in hot water outlet pipe comprise following several situation:
1) hot water, in courage is heated to keeping warm mode: water heater normal heating is to preset temperature, enter keeping warm mode, now the middle portion temperature of water heater is consistent with head temperature, all reach preset temperature, the temperature that top and middle portion temperature sensor record within a certain period of time keeps stable, if user now uses water, the temperature in hot water outlet pipe quick rising even can reach head temperature.
2) hot water, in courage is in the process of heating: water heater is not also heated to preset temperature; now middle portion temperature and head temperature are all at slow ascent stage; if and now put hot water; the temperature that the temperature sensor that there will be top and middle part records stops rising or rising slowly, and the temperature in hot water outlet pipe there will be zooming state.
3) state of the cooling from being incubated of the hot water, in courage: now in water heater courage, hot water is heated to preset temperature, and due to long-time heat preservation temperature start decline, but also do not reach the temperature again starting heating, if and now put hot water, substantially being heated to each temperature sensor under keeping warm mode with the hot water in courage shows consistent, and the temperature in hot water outlet pipe there will be zooming state.
Can be known by above situation, when user starts to use water, the temperature no matter top and middle portion temperature sensor measure stablizes, stops rising or slowly declining, all can there is zooming state in the temperature in its hot water outlet pipe, as long as when therefore detecting that its leaving water temperature is propradation, just can judging that hot water outlet pipe is for going out water state, disconnecting the power supply of the electrical heating elements of water heater, to ensure user's water safety.Simultaneous temperature sensor, relative to flow sensor of the prior art etc., reduces cost.
It should be noted that, the control method of electric water heater that the present embodiment proposes to be enumerated by state based on the structure of storage-type electric water heater itself and operating characteristic and is realized with transfer analysis, obviously can by increasing inflow temperature sensor or increasing speed and the accuracy that overall judgement accelerated by temperature sensor at mixed water valve place.Or by increasing the heating of top heating tube, and the outlet pipe temperature this tentative determination methods that do not rise all belongs to the method being judged user's water by outlet pipe variations in temperature.
The control method of electric water heater that the present embodiment proposes, by set temperature sensor in the outlet pipe of electric heater, Real-time Collection leaving water temperature, and judge that its variable condition in Preset Time is to judge whether user uses hot water, when being judged as that user brings into use hot water, cut off the power supply of electrical heating elements, temperature sensor is highly sensitive and testing result is accurate, not by the impact of discharge size, even if when the flow of user's water is less, also judge whether with water by variations in temperature, the problem that electric heater goes out water state cannot be detected when solving less by discharge in prior art.
With reference to shown in Fig. 3, the second embodiment of control method of electric water heater of the present invention is proposed based on the first embodiment.In the present embodiment, after step slo, the method also comprises:
Step S30, when the described leaving water temperature got is in decline state in described first Preset Time, obtains the variable condition of described water heater courage inner top temperature in the second Preset Time;
The present embodiment mainly uses water to judge whether user stopped.Due to when detecting that declining appears in leaving water temperature, may be the use of the hot water in water heater courage along with user, its temperature starts to be reduced gradually to top by bottom, therefore, the leaving water temperature now detected also can decline thereupon slowly, therefore will judge whether user stopped and also will judge in conjunction with the change of head temperature with water.Because the sensitivity of temperature sensor is higher, the interval of the first Preset Time and the second Preset Time is very little, and when reality judges, may be the time difference in a few second, the variations in temperature during this be negligible, does not affect overall judgement.
Step S40, when the variable condition of the described head temperature got is for stopping declining, is judged as that described hot water outlet pipe stops water outlet, is communicated with the power supply of the electrical heating elements of described water heater.
When user stops using hot water, the hot water conditions in water heater courage and the hot water conditions in hot water outlet pipe comprise following several situation:
1), middle portion temperature does not decline: showing under this state that present water heater uses hot water less, also do not cause the change of middle portion temperature, if now detect temperature decline in hot water outlet pipe to reach certain amplitude, then must be user's stopping water.
2), head temperature does not decline: this state refers to that middle portion temperature has started to decline, but head temperature does not also decline, if now detect temperature decline in hot water outlet pipe to reach certain amplitude, then must be user's stopping water.
3), head temperature declines: this state shows that head temperature has started to decline, hot water now in water heater seldom, when detecting that head temperature is stablized under this state, namely stops declining, detect temperature decline in hot water outlet pipe and reach certain amplitude, then judge that user stops use water.
When middle portion temperature does not decline, water heater uses hot water less, even if user's stopping hot water now being detected, the hot water temperature in courage is still in higher state, and the electrical heating elements now without the need to being communicated with water heater again heats.
The present embodiment is to judge that head temperature stops dropping to benchmark and judges whether hot water outlet pipe stops water outlet, in other embodiments, also can stop dropping to benchmark with middle portion temperature and judge whether hot water outlet pipe stops water outlet, or the variable condition further, in conjunction with head temperature and middle portion temperature judges whether hot water outlet pipe stops water outlet.
In conjunction with the variable condition of head temperature and leaving water temperature, the control method of electric water heater that the present embodiment proposes judges whether hot water outlet pipe stops water outlet, to be communicated with the power supply of the electrical heating elements of water heater in time and to continue heat hot water.
With reference to shown in Fig. 4, the 3rd embodiment of control method of electric water heater of the present invention is proposed based on the first embodiment.In the present embodiment, after step S20, the method also comprises:
Step S50, receives instant heating instruction;
Step S60, the instant heating heating tube starting described water heater according to the described instant heating instruction received heats the hot water of described water heater courage inner top.
In step S20, be judged as that described hot water outlet pipe is in out water state, after disconnecting the power supply of the electrical heating elements of described water heater, along with the hot water in courage continuously outflows, its temperature also constantly reduces, if now user still will continue, with hot water, can send instant heating instruction, this instruction can be passed through the methods such as the contact panel of remote controller or water heater and realize, for prior art, do not repeat them here.
Water heater is after receiving instant heating instruction, and can start instant heating heating tube for user provides hot water fast.This instant heating heating tube is arranged on the tip position of inner bag, water inlet due to hot water outlet pipe is positioned at the top of inner bag, near instant heating heating tube, therefore instant heating heating tube can provide hot water to arrange anticreeper for user fast, to ensure the safety of user.
The control method of electric water heater that the present embodiment proposes, after the power supply disconnecting electrical heating elements, by accepting the instant heating instruction of user, starting instant heating heating tube provides hot water fast for user, brings better Consumer's Experience.
With reference to shown in Fig. 5, the 4th embodiment of control method of electric water heater of the present invention is proposed based on the first embodiment.In the present embodiment, after step S20, the method also comprises:
Step S70, obtains the head temperature in described water heater courage;
Step S80, when the head temperature in the described water heater courage got is lower than preset temperature, the hot water that the instant heating heating tube starting described water heater heats described water heater courage inner top reaches described preset temperature.
The control method of electric water heater that the present embodiment proposes also is for user provides hot water fast by startup instant heating heating tube, be that the method for the present embodiment is without the need to accepting user instruction relative to the difference of the 3rd embodiment, by judging water heater courage inner top temperature, because head temperature is last decline, when head temperature drops to certain value, illustrate that the hot water temperature in courage is lower, automatically startup and hot heater provide hot water, to meet the hot water demand of user fast for user.
The present invention also proposes a kind of electric heater.
With reference to Fig. 6, it is the high-level schematic functional block diagram of electric heater first embodiment of the present invention.
In this embodiment, electric heater comprises:
Leaving water temperature detection module 10, the leaving water temperature variable condition that the temperature sensor for obtaining in hot water outlet pipe detects in the first Preset Time;
The top of existing storage-type electric water heater generally in courage and middle part are respectively arranged with temperature sensor, and to detect the temperature at hot water top and middle part in courage, whether the hot water in water heater is heated to preset temperature is generally as the criterion with middle portion temperature.The present embodiment on the basis of existing technology, a temperature sensor is set in hot water outlet pipe to detect coolant-temperature gage, because the induction sensitivity of temperature sensor is high, judgement for flow is sensitive, accurately can judge that the user being less than below general flow sensor startup flow threshold uses water behavior.
With reference to shown in Fig. 7, leaving water temperature detection module 10 comprises with lower unit:
Leaving water temperature collecting unit 110, for the leaving water temperature that the temperature sensor in hot water outlet pipe described in continuous acquisition detects in described first Preset Time;
In real time and detect coolant-temperature gage continuously, after water heater power supply is connected, temperature sensor in outlet pipe is started working, the collection leaving water temperature that leaving water temperature collecting unit 110 is real-time, be uploaded to processor, such as each second or two seconds can gather a leaving water temperature, and the temperature value collected is uploaded to the processor of water heater, processor carries out record.
Variations in temperature judging unit 120, for according in described first Preset Time continuous acquisition to described leaving water temperature judge its variable condition.
The temperature of hot water outlet pipe when not having hot water to flow through of water heater is lower, be generally normal temperature or a little more than normal temperature, when the hot water in water heater courage is in keeping warm mode, if user opens hot water water, hot water is had to flow through, temperature in hot water outlet pipe can rise at short notice fast, and the temperature sensor in hot water outlet pipe is at Real-time Collection leaving water temperature, when it rises at short notice fast, variations in temperature judging unit 120 according to continuous acquisition to leaving water temperature judge its variable condition.
Heating element heater control module 20, for when the described leaving water temperature variable condition got is propradation, is judged as that described hot water outlet pipe is in out water state, disconnects the power supply of the electrical heating elements of described water heater.
Existing storage-type electric water heater structure is generally sealed outlet, and it is intake from top water outlet by bottom with water, and namely in its courage, the temperature decline process of hot water must be that first bottom temp declines, then in courage, temperature declines, and last top declines.
When user uses hot water, the hot water conditions in water heater courage and the hot water conditions in hot water outlet pipe comprise following several situation:
1) hot water, in courage is heated to keeping warm mode: water heater normal heating is to preset temperature, enter keeping warm mode, now the middle portion temperature of water heater is consistent with head temperature, all reach preset temperature, the temperature that top and middle portion temperature sensor record within a certain period of time keeps stable, if user now uses water, the temperature in hot water outlet pipe quick rising even can reach head temperature.
2) hot water, in courage is in the process of heating: water heater is not also heated to preset temperature; now middle portion temperature and head temperature are all at slow ascent stage; if and now put hot water; the temperature that the temperature sensor that there will be top and middle part records stops rising or rising slowly, and the temperature in hot water outlet pipe there will be zooming state.
3) state of the cooling from being incubated of the hot water, in courage: now in water heater courage, hot water is heated to preset temperature, and due to long-time heat preservation temperature start decline, but also do not reach the temperature again starting heating, if and now put hot water, substantially being heated to each temperature sensor under keeping warm mode with the hot water in courage shows consistent, and the temperature in hot water outlet pipe there will be zooming state.
Can be known by above situation, when user starts to use water, the temperature no matter top and middle portion temperature sensor measure stablizes, stops rising or slowly declining, all can there is zooming state in the temperature in its hot water outlet pipe, as long as when therefore leaving water temperature detection module 10 detects that its leaving water temperature is propradation, heating element heater control module 20 just can judge that hot water outlet pipe is for going out water state, disconnect the power supply of the electrical heating elements of water heater, to ensure user's water safety.And temperature sensor is relative to flow sensor of the prior art etc., reduce cost.
The electric heater that the present embodiment proposes, by set temperature sensor in the outlet pipe of electric heater, Real-time Collection leaving water temperature, and judge that its variable condition in Preset Time is to judge whether user uses hot water, when being judged as that user brings into use hot water, cut off the power supply of electrical heating elements, temperature sensor is highly sensitive and testing result is accurate, not by the impact of discharge size, even if when the flow of user's water is less, also judge whether with water by variations in temperature, the problem that electric heater goes out water state cannot be detected when solving less by discharge in prior art.
With reference to shown in Fig. 8, the second embodiment of electric heater of the present invention is proposed based on the first embodiment.In the present embodiment, electric heater also comprises:
Head temperature detection module 30, for when the described leaving water temperature got is in decline state in described first Preset Time, obtains the variable condition of described water heater courage inner top temperature in the second Preset Time;
The present embodiment mainly uses water to judge whether user stopped.Due to when detecting that declining appears in leaving water temperature, may be the use of the hot water in water heater courage along with user, its temperature starts to be reduced gradually to top by bottom, therefore, the leaving water temperature now detected also can decline thereupon slowly, therefore will judge whether user stopped and also will judge in conjunction with the change of head temperature with water.Because the sensitivity of temperature sensor is higher, the interval of the first Preset Time and the second Preset Time is very little, and when reality judges, may be the time difference in a few second, the variations in temperature during this be negligible, does not affect overall judgement.
Heating element heater control module 20, also for when the variable condition of the described head temperature got is for stopping declining, being judged as that described hot water outlet pipe stops water outlet, being communicated with the power supply of the electrical heating elements of described water heater.
When user stops using hot water, the hot water conditions in water heater courage and the hot water conditions in hot water outlet pipe comprise following several situation:
1), middle portion temperature does not decline: showing under this state that present water heater uses hot water less, also do not cause the change of middle portion temperature, if now detect temperature decline in hot water outlet pipe to reach certain amplitude, then must be user's stopping water.
2), head temperature does not decline: this state refers to that middle portion temperature has started to decline, but head temperature does not also decline, if now detect temperature decline in hot water outlet pipe to reach certain amplitude, then must be user's stopping water.
3), head temperature declines: this state shows that head temperature has started to decline, hot water now in water heater seldom, when detecting that head temperature is stablized under this state, namely stops declining, detect temperature decline in hot water outlet pipe and reach certain amplitude, then judge that user stops use water.
When middle portion temperature does not decline, water heater uses hot water less, even if user's stopping hot water now being detected, the hot water temperature in courage is still in higher state, and the electrical heating elements now without the need to being communicated with water heater again heats.
With head temperature detection module 30, the present embodiment judges that head temperature stops dropping to benchmark and judges whether hot water outlet pipe stops water outlet, when being judged as stopping water outlet, heating element heater control module 20 is communicated with the power supply of Water heater electric heating element heater.In other embodiments, also can stop dropping to benchmark with middle portion temperature and judge whether hot water outlet pipe stops water outlet, or further, the variable condition in conjunction with head temperature and middle portion temperature judges whether hot water outlet pipe stops water outlet.
In conjunction with the variable condition of head temperature and leaving water temperature, the electric heater that the present embodiment proposes judges whether hot water outlet pipe stops water outlet by head temperature detection module 30, to be communicated with power supply and the continuation heat hot water of the electrical heating elements of water heater in time.
With reference to shown in Fig. 9, the 3rd embodiment of electric heater of the present invention is proposed based on the first embodiment.In the present embodiment, this electric heater also comprises:
Instant heating command reception module 40, for receiving instant heating instruction;
First instant heating heating tube control module 50, the instant heating heating tube for starting described water heater according to the described instant heating instruction received heats the hot water of described water heater courage inner top.
When heating element heater control module 20 is judged as that described hot water outlet pipe is in out water state, after disconnecting the power supply of the electrical heating elements of described water heater, along with the hot water in courage continuously outflows, its temperature also constantly reduces, if now user still will continue, with hot water, can send instant heating instruction, this instruction can be passed through the methods such as the contact panel of remote controller or water heater and realize, for prior art, do not repeat them here.
Instant heating command reception module 40 is after receiving instant heating instruction, and the first instant heating heating tube control module 50 starts instant heating heating tube for user provides hot water fast.This instant heating heating tube is arranged on the tip position of inner bag, water inlet due to hot water outlet pipe is positioned at the top of inner bag, near instant heating heating tube, therefore instant heating heating tube can provide hot water to arrange anticreeper for user fast, to ensure the safety of user.
The electric heater that the present embodiment proposes, after the power supply disconnecting electrical heating elements, by accepting the instant heating instruction of user, starting instant heating heating tube for user provides hot water fast.
With reference to shown in Figure 10, the 4th embodiment of electric heater of the present invention is proposed based on the first embodiment.In the present embodiment, this electric heater also comprises:
Middle portion temperature detection module 60, obtains the head temperature in described water heater courage;
Instant heating heating tube control module 70, when the head temperature in the described water heater courage got is lower than preset temperature, the hot water that the instant heating heating tube starting described water heater heats described water heater courage inner top reaches described preset temperature.
The electric heater that the present embodiment proposes also is for user provides hot water fast by startup instant heating heating tube, be that the present embodiment is without the need to accepting user instruction relative to the difference of the 3rd embodiment, water heater courage inner top temperature is judged by middle portion temperature detection module 60, because head temperature is last decline, when head temperature drops to certain value, illustrate that the hot water temperature in courage is lower, the automatic startup of instant heating heating tube control module 70 and hot heater provide hot water, to meet the hot water demand of user fast for user.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a control method of electric water heater, is characterized in that, described control method of electric water heater comprises:
Obtain the leaving water temperature variable condition that the temperature sensor in hot water outlet pipe detects in the first Preset Time;
When the described leaving water temperature variable condition got is propradation, is judged as that described hot water outlet pipe is in out water state, disconnects the power supply of the electrical heating elements of described water heater.
2. control method of electric water heater according to claim 1, is characterized in that, the step of the leaving water temperature variable condition that the temperature sensor in described acquisition hot water outlet pipe detects in the first Preset Time comprises:
The leaving water temperature that temperature sensor in hot water outlet pipe described in continuous acquisition detects in described first Preset Time;
According to continuous acquisition in described first Preset Time to described leaving water temperature judge its variable condition.
3. control method of electric water heater according to claim 1 and 2, it is characterized in that, after the step of the leaving water temperature variable condition that the temperature sensor in described acquisition hot water outlet pipe detects in the first Preset Time, described control method of electric water heater also comprises:
When the described leaving water temperature got is in decline state in described first Preset Time, obtain the variable condition of described water heater courage inner top temperature in the second Preset Time;
When the variable condition of the described head temperature got is for stopping declining, is judged as that described hot water outlet pipe stops water outlet, is communicated with the power supply of the electrical heating elements of described water heater.
4. control method of electric water heater according to claim 1 and 2, it is characterized in that, describedly be judged as that described hot water outlet pipe is in out water state, after disconnecting the step of the power supply of the electrical heating elements of described water heater, described control method of electric water heater also comprises:
Receive instant heating instruction;
The instant heating heating tube starting described water heater according to the described instant heating instruction received heats the hot water of described water heater courage inner top.
5. control method of electric water heater according to claim 1 and 2, it is characterized in that, describedly be judged as that described hot water outlet pipe is in out water state, after disconnecting the step of the power supply of the electrical heating elements of described water heater, described control method of electric water heater also comprises:
Obtain the head temperature in described water heater courage;
When the head temperature in the described water heater courage got is lower than preset temperature, the hot water that the instant heating heating tube starting described water heater heats described water heater courage inner top reaches described preset temperature.
6. an electric heater, is characterized in that, described electric heater comprises:
Leaving water temperature detection module, the leaving water temperature variable condition that the temperature sensor for obtaining in hot water outlet pipe detects in the first Preset Time;
Heating element heater control module, for when the described leaving water temperature variable condition got is propradation, is judged as that described hot water outlet pipe is in out water state, disconnects the power supply of the electrical heating elements of described water heater.
7. electric heater according to claim 6, is characterized in that, described leaving water temperature detection module comprises:
Leaving water temperature collecting unit, for the leaving water temperature that the temperature sensor in hot water outlet pipe described in continuous acquisition detects in described first Preset Time;
Variations in temperature judging unit, for according in described first Preset Time continuous acquisition to described leaving water temperature judge its variable condition.
8. the electric heater according to claim 6 or 7, is characterized in that, described control device also comprises:
Head temperature detection module, for when the described leaving water temperature got is in decline state in described first Preset Time, obtains the variable condition of described water heater courage inner top temperature in the second Preset Time;
Described heating element heater control module also for when the variable condition of the described head temperature got is for stopping declining, is judged as that described hot water outlet pipe stops water outlet, is communicated with the power supply of the electrical heating elements of described water heater.
9. the electric heater according to claim 6 or 7, is characterized in that, described control device also comprises:
Instant heating command reception module, for receiving instant heating instruction;
First instant heating heating tube control module, the instant heating heating tube for starting described water heater according to the described instant heating instruction received heats the hot water of described water heater courage inner top.
10. the electric heater according to claim 6 or 7, is characterized in that, described control device also comprises:
Middle portion temperature detection module, for obtaining the head temperature in described water heater courage;
Second instant heating heating tube control module, for when the head temperature in the described water heater courage got is lower than preset temperature, the hot water that the instant heating heating tube starting described water heater heats described water heater courage inner top reaches described preset temperature.
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| CN107152788A (en) * | 2017-07-20 | 2017-09-12 | 广东万家乐燃气具有限公司 | Control system of electric water heater and electric heater |
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Application publication date: 20151111 |