CN104110883B - Gas heater and its control method - Google Patents
Gas heater and its control method Download PDFInfo
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- CN104110883B CN104110883B CN201410082014.2A CN201410082014A CN104110883B CN 104110883 B CN104110883 B CN 104110883B CN 201410082014 A CN201410082014 A CN 201410082014A CN 104110883 B CN104110883 B CN 104110883B
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Abstract
The present invention proposes a kind of gas heater and its control method, wherein control method the following steps are included: detection gas heater water inlet water flow signal；Judge whether water flow is greater than or equal to default water flow according to water flow signal；Timing is carried out if water flow is greater than or equal to default water flow, and further judges whether timing time is greater than preset time；If timing time is greater than or equal to preset time, gas heater starting heating is controlled.Gas heater and its control method of the invention, it can be determined that whether really there is water flow to flow through gas heater, and heated in a relatively short period of time after gas heater unlatching, and the malfunction of gas heater can be prevented.
Description
Technical field
The present invention relates to the technical field of electrical appliances manufacturing, in particular to a kind of gas heater and its control method.
Background technique
Gas heater is a kind of commonplace household electrical appliance, provides great convenience to people.Most of combustion gas heat
Hydrophone perceives the size of water flow using Hall type water flow sensor, is returned by water flow sensor in the detection unit time
The umber of pulse returned judges the size of current water flow.If after opening tap, without hot water, it will cause water flows for a long time
Waste, on the contrary, if the too short time be detected by water flow to opening water heater, in the water inlet pipe of other and water heater
When water is closed in identical place, the water inlet of water heater can be caused to impact, thus water heater is caused to malfunction.
In addition, existing Hall type water flow sensor generally judges current water flow: pulse frequency using following formula
Rate (Hz)=8.1* water flow size (L/min) -3, wherein pulse frequency is that Hall type water flow sensor is issued according to water flow
Pulse frequency.For example, water flow is 5L(liter per minute), then it is 8.1*5- according to the frequency of above-mentioned acquisition water flow sensor
3=37.5Hz, that is to say, that the signal of water flow is 37.5 pulses of transmission per second.It is generally acknowledged that being more than the water flow of 3L
Start water heater, i.e., when umber of pulse per second >=21 thinks that user opens tap, is converted to the time, i.e. between two pulses
Think that user opens tap when being spaced≤47 milliseconds.The process for carrying out water flow detection at present specifically includes that one timing of detection
In pulse number with it is determined whether to enable taps, such as when pulse number >=10 item in 500ms think open the fire hose
Head.Alternatively, the interval between two pulses of detection, thinks to open water when for example, the interval between two pulses is less than 47 milliseconds
Faucet.
It is understood that water flow sensor can issue pulse frequency immediately if user normally opens tap
Signal judges water flow by above-mentioned method, and then the unlatching for controlling water heater is that there is no problem.But in practice, due to
The laying of the extraneous pipeline local boiled water that perhaps hydraulic pressure is excessively high or user communicates at other with heater inleting pipe closes water again
Afterwards, impact can be also resulted in the water flow sensor of water heater, the effect that water flow sensor is under pressure also can be in a timing
Interior rotation, thus issue pulse duration frequency signal.For example, it was verified that in kitchen faucet and water feeding of heater faucet distance
Within 10 meters, and hydraulic pressure is in 0.2MPa(megapascal) more than when, kitchen faucet is opened closes again, the water flow of water heater sensing
Device can send the signal that pulse is more than 3L, and the time can achieve 600-700 milliseconds, if detecting the time of water flow lower than this
Value opens water heater, and it will cause water heater malfunctions, thus cause the illusion of water heater failure.
Summary of the invention
The purpose of the present invention is intended to solve above-mentioned technical problem at least to a certain extent.
For this purpose, an object of the present invention is to provide a kind of control method of gas heater, the gas heater
Control method can decide whether really have water flow to flow through gas heater, and after gas heater is opened when shorter
It is interior to be heated, and the malfunction of gas heater can be prevented.
It is another object of the present invention to propose a kind of gas heater.
In order to achieve the above objectives, an aspect of of the present present invention embodiment proposes a kind of control method of gas heater, the combustion
The control method of gas water heater is the following steps are included: detect the water inlet water flow signal of gas heater；According to the water flow
Signal judges whether water flow is greater than or equal to default water flow；If the water flow is greater than or equal to the default water flow
Timing is then carried out, and further judges whether timing time is greater than preset time；If the timing time is greater than or equal to pre-
If the time, then the gas heater starting heating is controlled.
The control method of gas heater according to an embodiment of the present invention is big in water flow by detection water inlet water flow
When presetting water flow, and meet the time of this condition more than or equal to preset time, confirmation has water to flow through combustion gas heat
Hydrophone, so control gas heater heated, so as to whether have water flow through gas heater carry out it is stringenter
Judgement, can be laid with to avoid such as external water pipe of the impact because of water inlet or hydraulic pressure is excessively high that gas heater is caused to malfunction,
And when user really uses water, gas heater starting heating is controlled within a short period of time, it is more convenient.
In some embodiments of the invention, if the water flow is less than the default water flow, timing is reset.
Wherein, in some embodiments of the invention, the water flow is sensed by the water flow of the gas heater
Device is detected, and the water flow sensor generates pulse duration frequency signal according to the water flow.
Specifically, in some embodiments of the invention, above-mentioned control method further include: according to the pulse duration frequency signal
Obtain the interval time between each pulse；Judge whether the interval time is less than or equal to preset interval time；If institute
Stating interval time then carries out timing less than or equal to the preset interval time, and it is pre- further to judge whether timing time is greater than
If the time.
In addition, in some embodiments of the invention, if the interval time is greater than the preset interval time, counting
When reset.
In order to achieve the above objectives, another aspect of the present invention embodiment proposes a kind of gas heater, the gas heater
It include: water flow sensor, for detecting gas heater water inlet water flow signal；Timer；Controller, the controller root
Judge whether water flow is greater than or equal to default water flow according to the water flow signal, and is greater than or equal to institute in the water flow
When stating default water flow, controls the timer and carry out timing, and further judge whether timing time is greater than preset time, with
And when the timing time is greater than or equal to preset time, the gas heater starting heating is controlled.
Gas heater according to an embodiment of the present invention detects water inlet water flow by water flow amount detector, in water flow
More than or equal to default water flow, and when the time for meeting this condition of timer record is greater than or equal to preset time, confirmation
There is water to flow through gas heater, and then controller control gas heater is heated, so as to whether thering is water to flow through combustion
Gas water heater carries out stringenter judgement, can be to avoid due to the impact of water inlet such as external water pipe is laid with or hydraulic pressure is excessively high
Cause gas heater to malfunction, and when user really uses water, gas heater starting can be controlled within a short period of time and added
Heat, it is more convenient.
In some embodiments of the invention, when the water flow is less than the default water flow, the controller control
The timer is made to reset.
Wherein, the water flow sensor generates pulse duration frequency signal according to the water flow signal.
In some embodiments of the invention, the controller is also used to obtain each arteries and veins according to the pulse duration frequency signal
Interval time between punching, and judge whether the interval time is less than or equal to preset interval time, in the interval time
The timer is controlled when less than or equal to the preset interval time and carries out timing, and further judges whether timing time is big
In preset time.
In some embodiments of the invention, when the interval time being greater than the preset interval time, the control
Device controls the timer and resets.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is the flow chart according to the control method of the gas heater of one embodiment of the present of invention；
Fig. 2 is the process according to the partial routine of the control method of the gas heater of another embodiment of the invention
Figure；
Fig. 3 is the flow chart of the control method of the gas heater of a specific embodiment according to the present invention；
Fig. 4 is the schematic diagram according to the gas heater of one embodiment of the present of invention；And
Fig. 5 is the schematic diagram according to the course of work of the gas heater of one embodiment of the present of invention.
Appended drawing reference
Water flow sensor 10, timer 20 and controller 30.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Following disclosure provides many different embodiments or example is used to realize different structure of the invention.For letter
Change disclosure of the invention, hereinafter the component of specific examples and setting are described.Certainly, they are merely examples, and
It is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or letter.It is this heavy
It is for purposes of simplicity and clarity, itself not indicate the relationship between discussed various embodiments and/or setting again.This
Outside, the present invention provides various specific techniques and material example, but those of ordinary skill in the art may be aware that
The applicable property of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it
The structure of "upper" may include the embodiment that the first and second features are formed as directly contacting, and also may include other feature shape
At the embodiment between the first and second features, such first and second feature may not be direct contact.
In the description of the present invention, it should be noted that unless otherwise specified and limited, term " installation ", " connected ",
" connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, the connection being also possible to inside two elements can
, can also indirectly connected through an intermediary, for the ordinary skill in the art to be to be connected directly, it can basis
Concrete condition understands the concrete meaning of above-mentioned term.
Referring to following description and drawings, it will be clear that these and other aspects of the embodiment of the present invention.In these descriptions
In attached drawing, some particular implementations in the embodiment of the present invention are specifically disclosed, to indicate to implement implementation of the invention
Some modes of the principle of example, but it is to be understood that the scope of embodiments of the invention is not limited.On the contrary, of the invention
Embodiment includes all changes, modification and the equivalent fallen within the scope of the spirit and intension of attached claims.
The gas heater proposed according to embodiments of the present invention and its control method are described with reference to the accompanying drawings.
Fig. 1 is the flow chart according to the control method of the gas heater of one embodiment of the present of invention.As shown in Figure 1,
The control method of the gas heater of the embodiment of the present invention the following steps are included:
S1 detects the water inlet water flow signal of gas heater.
For example, it is identical as existing gas heater, water inlet water flow letter can be detected by Hall type water flow sensor
Number.Water flow sensor is located at the water inlet of gas heater, and water flow flows through gas heater, when there is water flow to pass through, Hall type
The magnet rotor of water flow sensor can rotate, thus generate water flow signal corresponding with water flow, in addition, it is necessary to explanation
That the laying or hypertonia due to gas heater external world connecting pipe make water inlet pressure big, also tend to meeting so that
Magnet rotor generates rotation, thus water flow sensor detects water flow signal.Such as kitchen faucet and water heater into
Tap distance is within 10 meters, and hydraulic pressure is in 0.2MPa(megapascal) more than when, kitchen faucet open again close, gas and hot water
The water flow sensor of device can send the signal that pulse is more than 3L, and the time can achieve 600-700 milliseconds, it is easy to cause to miss
Operation.
S2 judges whether water flow is greater than or equal to default water flow according to water flow signal.
Specifically, such as Hall type water flow sensor detects water flow signal such as pulse signal, output pulse letter
Number frequency is directly proportional to the revolving speed of magnet rotor, and the revolving speed of magnet rotor is again directly proportional to water flow, and then can be according to water flow
Amount signal judges the relationship of water flow Yu default water flow, if water inlet water flow is greater than or equal to default water flow, executes
Step S3.
S3 carries out timing if water flow is greater than or equal to default water flow, and further whether judges timing time
Greater than preset time.
If it is determined that water flow is greater than or equal to default water flow such as 3L/min (liter/min), then record meets this
The time of part, and timing time is compared with such as 800 milliseconds of preset time, it is preset if timing time is greater than or equal to
Time thens follow the steps S4.
S4 controls gas heater starting heating if timing time is greater than or equal to preset time.
Specifically, if timing time is greater than or equal to preset time, meet water flow in other words and be greater than or equal to default water
The duration of flow is greater than or equal to such as 800 milliseconds of preset time, then thinks have water flow by gas heater at this time, uses
Family open tap, then control gas heater and heated, with guarantee confirmation really open tap when can as early as possible into
Row heating obtains hot water, meets user's needs.
In one embodiment of the invention, if it is determined that water inlet water flow is less than default water flow such as 3L/min, then
Timing is reset.Specifically, for example, if timing is carried out, if examined again when water inlet water flow is greater than or equal to default water flow
When the water inlet water flow of survey is less than default water flow, then timing is reset, and is greater than or equal to default water flow again in water inlet water flow
When amount, reclocking is carried out.
Specifically, in one embodiment of the invention, the water flow sensor that water flow signal passes through gas heater
It is detected, and then water flow sensor generates pulse duration frequency signal according to water flow signal.As shown in Fig. 2, include in turn with
Lower step:
S201 obtains the interval time between each pulse according to pulse duration frequency signal.
Wherein, the interval between each pulse and water flow have corresponding relationship.
S202, judges whether interval time is less than or equal to preset interval time.
Such as judge whether the interval between pulse is less than or equal to 47 milliseconds, that is, correspond to whether water flow is greater than or equal to
3L/min.If interval time, which is less than or equal to 47 milliseconds of preset interval time, thens follow the steps S203, otherwise return step
S201。
S203 carries out timing if interval time is less than or equal to preset interval time, and when further judging timing
Between whether be greater than preset time.
Specifically, when judging that the interval between two pulses is less than or equal to such as 47 milliseconds of preset interval time, then
Timing is carried out, record meets the duration of above-mentioned condition, and then judges whether the duration is greater than such as 800 milli of preset time
Second, if so, thening follow the steps S4, i.e., when timing time is greater than preset time, then it is assumed that there is water flow to flow through gas heater,
Control water heater is heated.In other words according to the interpulse period of water flow sensor and the duration of continuous impulse come
Water flow is judged whether there is by gas heater, when only meeting above-mentioned two condition simultaneously, just thinks that water flow flows through combustion gas heat
Hydrophone, and then the blower starting of gas heater is controlled, heating tube is opened, and preparation starts to burn.Otherwise return step S201.
In addition, during carrying out timing, if the interval time of pulse is greater than preset interval time, it is believed that combustion gas heat
The water inlet water flow of hydrophone is less than default water flow, then timing is reset, and is less than preset interval time in detection interval time again
When, re-start timing.
According to the control process of above-mentioned gas heater, in one particular embodiment of the present invention, as shown in figure 3, packet
It includes:
S301 is set with water flow duration T all=0.
S302 detects that the failing edge of water flow signal interrupts.
S303 calculates the interval time Tn (millisecond) between a upper failing edge.
S304 judges whether to meet Tn≤47 millisecond.
Wherein, preset interval time is 47 milliseconds.If so, S305 is thened follow the steps, it is no to then follow the steps S308.
S305 has the water flow duration to increase Tall=Tall+Tn.
S306 judges whether to meet Tall >=800 millisecond.
Wherein, preset time is 800 milliseconds, if so, thening follow the steps S307, otherwise returns goods step S302.
S307, has water to flow through gas heater, and control fuel gas of fuel gas water heater valve closing is heated.
S308 has the water flow duration to reset Tall=0.
In conclusion the control method of gas heater according to an embodiment of the present invention, by detecting water flow of intaking,
When the time that water flow, which is greater than or equal to, to be preset water flow, and meet this condition is greater than or equal to preset time, confirmation has water flow
It through gas heater, and then controls gas heater and is heated, so as to whether thering is water to flow through gas heater to carry out
Stringenter judgement can be laid with to avoid such as external water pipe of the impact because of water inlet or hydraulic pressure is excessively high leads to gas heater
Malfunction, and when user really uses water, gas heater starting heating is controlled within a short period of time, it is more convenient.
The gas heater of embodiment according to a further aspect of the invention is described with reference to the accompanying drawings.
Fig. 4 is the schematic diagram according to the gas heater of one embodiment of the invention.As shown in figure 4, the embodiment of the present invention
Gas heater 100 include water flow sensor 10, timer 20 and controller 30.Wherein, water flow sensor 10 is used for
Detect gas heater water inlet water flow signal.It is pre- that controller 30 according to water flow signal judges whether water flow is greater than or equal to
If water flow, and when water flow is greater than or equal to default water flow, control timer 20 carries out timing, and further judgement meter
When the time whether be greater than preset time, and when timing time is greater than or equal to preset time, control gas heater 100 is opened
Dynamic heating.
Specifically, for example, it is identical as existing gas heater, water inlet water can be detected by Hall type water flow sensor
Flow signal.Water flow sensor 10 is located at the water inlet of gas heater, and water flow flows through gas heater, when water passes through Hall
The magnet rotor of type water flow sensor can rotate, thus generate water flow signal corresponding with water flow, in addition, it is necessary to illustrate
, laying or hypertonia due to gas heater external world connecting pipe make water inlet pressure larger, also tend to meeting
So that magnet rotor generates rotation, thus water flow sensor detects water flow signal.Such as in kitchen faucet and hot water
Device feed cock distance is within 10 meters, and hydraulic pressure is in 0.2MPa(megapascal) more than when, kitchen faucet open again close, combustion gas
The water flow sensor of water heater can send the signal that pulse is more than 3L, and the time can achieve 600-700 milliseconds, thus hold very much
Easily cause maloperation.
Hall type water flow sensor exports the revolving speed of water flow signal such as pulse signal frequency and magnet rotor at just
Than the revolving speed of magnet rotor is again directly proportional to water flow, and then can judge water flow and default water flow according to water flow signal
The relationship of amount, if water inlet water flow is greater than or equal to default water flow such as 3L/min (liter/min), controller 30 is controlled
Timer 20 carries out timing, and further, when meeting water inlet water flow more than or equal to default water flow, timer 20 is carried out
Continue timing, and then controller 30 judges whether timing time is greater than such as 800 milliseconds of preset time.If timing time is greater than
Or it is equal to preset time, meet water flow in other words and is greater than or equal to the duration of default water flow more than or equal to preset time
Such as 800 milliseconds, then think have water flow by gas heater at this time, user opens tap, then controller 30 controls combustion gas
Water heater is heated, to guarantee that can carry out heating as early as possible when confirmation really opens tap obtains hot water, meets user
It needs.
In one embodiment of the invention, if it is determined that water inlet water flow is less than default water flow such as 3L/min, then
Controller 30 controls 20 timing of timer and resets.Specifically, for example, if when water inlet water flow is greater than or equal to default water flow,
Timing is carried out, if the water inlet water flow detected again is less than default water flow, 20 timing of timer is reset, in water inlet water
When flow is greater than or equal to default water flow again, reclocking is carried out.
Specifically, in one embodiment of the invention, detection is carried out by water flow sensor 10 and obtains water flow letter
Number, water flow sensor 10 can generate pulse duration frequency signal according to water flow signal.And then controller 30 can be according to pulse
Frequency signal controls blower, gas valve, to start or stop burning.
Specifically, such as the schematic diagram of the course of work for the gas heater that Fig. 5 is one embodiment of the present of invention.Such as Fig. 5
It is shown, water flow sensor 10 according to water flow size variation send different frequency pulse signal to controller 30 for example
CPU (Central Processing Unit, central processing unit), so CPU according to pulse duration frequency signal obtain each pulse it
Between interval time, and judge whether interval time is less than or equal to preset interval time, wherein the interval between each pulse
There is corresponding relationship with water flow.Such as the current water flow for being 3L, calculating umber of pulse per second according to formula is less than 21.3
It is a, be calculated as the corresponding time, i.e. between two pulses between to be divided into the water flow that 47 milliseconds are then thought at this time be 3L/min.Similarly
Detect that 16.18 milliseconds are divided between two umber of pulses then thinks that current water flow is 8L/min.Such as controller 30 judges arteries and veins
Whether the interval between punching is less than or equal to such as 47 milliseconds of preset interval time, that is, corresponds to whether water flow is greater than or equal to
3L/min.If interval time is less than or equal to 47 milliseconds of preset interval time, controller 30 controls timer 20 and is counted
When, and further judge whether timing time is greater than preset time.
In other words, when judging that the interval between two pulses is less than or equal to such as 47 milliseconds of preset interval time,
Then timer 20 carries out timing, and record meets the duration of above-mentioned condition, and then controller 30 judges whether the duration is big
In such as 800 milliseconds of preset time, and then when timing time is greater than preset time, then it is assumed that there is water flow to flow through gas and hot water
Device, then controller 30 controls blower, heating tube and gas valve starting, and control water heater is heated.30 basis of controller in other words
The interpulse period of water flow sensor and the duration of continuous impulse are to determine whether there is water flow to pass through gas and hot water
Device when only meeting above-mentioned two condition simultaneously, just thinks that water flow flows through gas heater, and then control the wind of gas heater
Machine starting, heating tube are opened, and preparation starts to burn.
In addition, during carrying out timing, if the interval time of pulse is greater than preset interval time, it is believed that combustion gas heat
The water inlet water flow of hydrophone is less than default water flow, then controller 30 controls 20 timing of timer and resets, at detection interval again
When time is less than preset interval time, carry out re-starting timing.
In conclusion gas heater according to an embodiment of the present invention, detects water inlet water flow by water flow amount detector,
It is greater than or equal to default water flow in water flow, and the time for meeting this condition of timer record is greater than or equal to preset time
When, confirmation has water to flow through gas heater, and then controller control gas heater is heated, so as to whether having water
It flows through gas heater and carries out stringenter judgement, it can be to avoid the impact because of water inlet such as external water pipe laying or hydraulic pressure
It is excessively high and gas heater is caused to malfunction, and when user really uses water, gas heater can be controlled within a short period of time
Starting heating, it is more convenient.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: there is the electricity of one or more wirings
Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random-access memory (ram), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
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 spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is by appended claims and its equivalent limits.
Claims (10)
1. a kind of control method of gas heater, which comprises the following steps:
Detect the water inlet water flow signal of gas heater；
Judge whether water flow is greater than or equal to default water flow according to the water flow signal；
If the water flow be greater than or equal to the default water flow, start timing, and record the water flow be greater than or
Equal to the duration of the default water flow；
When the duration being greater than or equal to preset time, then the gas heater starting heating is controlled.
2. the control method of gas heater as described in claim 1, which is characterized in that further include:
If the water flow is less than the default water flow, stop timing, and the duration is reset.
3. the control method of gas heater as described in claim 1, which is characterized in that the water flow signal passes through described
The water flow sensor of gas heater is detected, and the water flow sensor generates pulse frequency according to the water flow signal
Rate signal.
4. the control method of gas heater as claimed in claim 3, which is characterized in that further include:
The interval time between each pulse is obtained according to the pulse duration frequency signal；
Judge whether the interval time is less than or equal to preset interval time；
If the interval time is less than or equal to the preset interval time, start timing, and record the pulse frequency
Signal meets the duration for the interval time being less than or equal to the preset interval time, and further judges described lasting
Whether the time is greater than preset time.
5. the control method of gas heater as claimed in claim 4, which is characterized in that further include:
If the interval time is greater than the preset interval time, stop timing, and the duration is reset.
6. a kind of gas heater characterized by comprising
Water flow sensor, for detecting gas heater water inlet water flow signal；
Timer；
Controller, the controller are used to judge whether water flow is greater than or equal to default water flow according to the water flow signal
Amount, the timer are used to start timing, and record the water when the water flow is greater than or equal to the default water flow
Flow is greater than or equal to the duration of the default water flow, and the controller in the duration for being greater than or equal to
When preset time, the gas heater starting heating is controlled.
7. gas heater as claimed in claim 6, which is characterized in that be less than the default water flow in the water flow
When, the controller controls the timer and stops timing, and the duration is reset.
8. gas heater as claimed in claim 6, which is characterized in that the water flow sensor is believed according to the water flow
Number generate pulse duration frequency signal.
9. gas heater as claimed in claim 8, which is characterized in that the controller is also used to according to the pulse frequency
Signal obtains the interval time between each pulse, and judges whether the interval time is less than or equal to preset interval time,
The timer is also used to start timing, and record institute when the interval time being less than or equal to the preset interval time
It states pulse duration frequency signal and meets the duration that the interval time is less than or equal to the preset interval time, the controller
For further judging whether the duration is greater than preset time.
10. gas heater as claimed in claim 9, which is characterized in that be greater than the preset interval in the interval time
When the time, the controller controls the timer and stops timing, and the duration is reset.
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| CN106091396A (en) * | 2016-07-15 | 2016-11-09 | 珠海格力电器股份有限公司 | Water heating apparatus and water flow regulating device thereof and method |
| CN108302771B (en) * | 2018-01-31 | 2021-03-16 | 广东万和新电气股份有限公司 | Shared control method, device and system for gas water heater |
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| CN113983694B (en) * | 2021-11-25 | 2023-06-02 | 华帝股份有限公司 | Control method for minimum load matching start flow of gas water heater |
| CN114224260A (en) * | 2021-12-15 | 2022-03-25 | 珠海格力电器股份有限公司 | Control method and device for accurate water inlet of dish washing machine, medium and dish washing machine |
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