CN110454984A - Control method of constant-temperature gas water heater and gas water heater - Google Patents
Control method of constant-temperature gas water heater and gas water heater Download PDFInfo
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- CN110454984A CN110454984A CN201910698657.2A CN201910698657A CN110454984A CN 110454984 A CN110454984 A CN 110454984A CN 201910698657 A CN201910698657 A CN 201910698657A CN 110454984 A CN110454984 A CN 110454984A
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- gas
- flue
- water heater
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- temperature
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a control method of a constant-temperature gas water heater, which comprises the following steps: starting a gas water heater, collecting a current smoke temperature value, and if the current smoke temperature is within a preset temperature threshold value, not carrying out load regulation and fan flow regulation on the gas water heater; if the current flue gas temperature exceeds the preset temperature threshold, adjusting the current fan flow input by the gas water heater to enable the current flue gas temperature to be within the preset temperature threshold; the invention also discloses a constant-temperature gas water heater. The control method not only effectively solves the problem of overlarge temperature fluctuation when the combustion state of the gas water heater is changed in the using process, but also can keep the optimal working state of the gas water heater in real time, avoid the formation of condensed water, and simultaneously realize the purpose of carrying out real-time constant temperature control on the gas water heater under different conditions.
Description
Technical field
The invention belongs to gas heater technical fields, and in particular to a kind of control method and perseverance of constant temp gas water heater
Warm gas heater.
Background technique
Whether constant temperature is always to measure the most critical factor that has excellent performance of water heater to gas heater, temperature persistance for
It is the most directly to experience for the usage comfort at family.Temperature persistance is mainly guaranteed by two aspects at present: first, heat
Hydrophone constant temperature algorithm matches optimal thermic load section by calculating inlet and outlet temperature difference and monitoring water flow size, uses
Coolant-temperature gage is consistent with the desired setting temperature of user；Second, bypass pipe is directly arranged in heat exchanger water outlet and water route
Road reaches set temperature with water end (W.E.) to meet by hot and cold water mixing.
But during water heater working, there are the variations of air supply deficiency or external environment to lead to unstable combustion
It is fixed, if not controlled to adjust accordingly, water heater performance can be had an impact, the combustion gas for having consumed equivalent does not produce
Equivalent heat is given birth to heat cold water, causes temperature fluctuation excessive, not constant temperature.
Summary of the invention
In view of this, solving existing combustion the object of the present invention is to provide a kind of control method of constant temp gas water heater
Gas water heater when combustion state changes in use temperature fluctuation it is excessive, lead to that combustion instability, constant temperature is not asked
Topic.
The present invention also aims to a kind of constant temp gas water heaters.
The technical scheme adopted by the invention is that: a kind of control method of constant temp gas water heater, which is characterized in that the party
Method includes:
Start gas heater, current flue-gas temperature value is acquired, if the current flue-gas temperature is located at preset temperature threshold
When interior, then the gas heater is adjusted without Load Regulation and compressor flow；
If the current flue-gas temperature exceeds the preset temperature threshold, the current of the gas heater input is adjusted
Compressor flow, so that the current flue-gas temperature is located in the preset temperature threshold.
Preferably, if the current flue-gas temperature exceeds the preset temperature threshold, it is defeated to adjust the gas heater
The current compressor flow entered, so that the current flue-gas temperature is located in the preset temperature threshold, method particularly includes:
If the current flue-gas temperature is higher than the upper limit value of the preset temperature threshold, by reducing the gas and hot water
The current compressor flow of device input, so that the current flue-gas temperature is located in the preset temperature threshold；
If the current flue-gas temperature is lower than the lower limit value of the preset temperature threshold, by improving the gas and hot water
The current compressor flow of device input, so that the current flue-gas temperature is located in the preset temperature threshold.
Preferably, the specified exhaust gas temperature value-of the lower limit value of the preset temperature threshold=gas heater is described
Specified exhaust gas temperature value × 10%.
Preferably, the specified exhaust gas temperature value of the upper limit value of the preset temperature threshold=gas heater+described
Specified exhaust gas temperature value × 10%.
Another technical solution of the invention is achieved in that a kind of constant temp gas water heater comprising water heater sheet
The control of body, flue-gas temperature detection probe, blower, the flue-gas temperature change compressor flow acquired according to flue-gas temperature detection probe
Unit, the blower are arranged in water heater body, and the exhaust fume collecting hood of water heater body is arranged in the flue-gas temperature detection probe
On, and the test side of the flue-gas temperature detection probe is stretched in exhaust fume collecting hood, the flue-gas temperature detection probe and blower with
Control unit is electrically connected the compressor flow for being used for transmission signal and controlling water heater.
Preferably, the flue-gas temperature detection probe is at interval of 2min that signal feedback is primary in described control unit,
After described control unit is compared according to continuous 3 times signal values of feedback, then determine the working condition of the gas heater
And corresponding control is carried out to the gas heater.
Preferably, corresponding control is carried out to the gas heater method particularly includes: to the wind of the gas heater
Machine flow is controlled.
Compared with prior art, preset temperature threshold needed for gas heater is stored in control unit in advance by the present invention
In, then start gas heater, and acquire current flue-gas temperature value, if the current flue-gas temperature is located at preset temperature threshold
When interior, then the gas heater is without load control system；If the current flue-gas temperature exceeds the preset temperature threshold,
The current compressor flow for adjusting the gas heater input, so that the current flue-gas temperature is located at the preset temperature threshold
It is interior, so not only effective solution gas heater when combustion state changes in use temperature fluctuation it is excessive
Problem, and the optimum Working of gas heater can be kept in real time, the formation of condensed water is avoided, is also achieved simultaneously
Thermostatically controlled purpose in real time is carried out to gas heater at different conditions.
Detailed description of the invention
Fig. 1 is the flow chart one that the present invention provides that embodiment 1 provides a kind of control method of constant temp gas water heater；
Fig. 2 is the flowchart 2 that the present invention provides that embodiment 1 provides a kind of control method of constant temp gas water heater；
Fig. 3 is that the present invention provides the structural schematic diagram of the offer kind constant temp gas water heater of embodiment 1.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
A kind of control method for constant temp gas water heater that the embodiment of the present invention 1 provides, as shown in Figure 1 and Figure 2, this method
Include:
Start gas heater, acquires current flue-gas temperature, if current flue-gas temperature is located in preset temperature threshold,
Gas heater is adjusted without Load Regulation and compressor flow；
If current flue-gas temperature exceeds the preset temperature threshold, the current blower stream of regulating gas water heater input
Amount, so that current flue-gas temperature is located in preset temperature threshold.
After adopting the above scheme, by the way that preset temperature threshold needed for gas heater is stored in control unit in advance,
Then start gas heater, and acquire current flue-gas temperature value, if current flue-gas temperature is located in preset temperature threshold,
The gas heater is without load control system；If current flue-gas temperature exceeds preset temperature threshold, regulating gas water heater
The current compressor flow of input, so that current flue-gas temperature is located in preset temperature threshold, not only effective solution is fired in this way
Gas water heater excessive problem of temperature fluctuation when combustion state changes in use, and can keep firing in real time
The optimum Working of gas water heater, avoids the formation of condensed water, while also achieving at different conditions to gas heater
Carry out thermostatically controlled purpose in real time.
As shown in Figure 1 and Figure 2, further, if current flue-gas temperature exceeds the preset temperature threshold, regulating gas
The current compressor flow of water heater input, so that current flue-gas temperature is located in the preset temperature threshold, method particularly includes:
If current flue-gas temperature is higher than the upper limit value of preset temperature threshold, by reducing the current of gas heater input
Compressor flow, so that current flue-gas temperature is located in the preset temperature threshold；
If current flue-gas temperature is lower than the lower limit value of preset temperature threshold, by improving the gas heater input
Current compressor flow, so that current flue-gas temperature is located in the preset temperature threshold.
After adopting the above scheme, by the way that preset temperature threshold needed for gas heater is stored in control unit in advance,
Then start gas heater, and acquire current flue-gas temperature value, if current flue-gas temperature is located in preset temperature threshold,
Gas heater is without load control system；If current flue-gas temperature is higher than the upper limit value of preset temperature threshold, fired by reducing
The current compressor flow of gas water heater input, so that current flue-gas temperature is located in the preset temperature threshold；If current flue gas
When temperature is lower than the lower limit value of preset temperature threshold, by improving the current compressor flow of the gas heater input, so that
Current flue-gas temperature is located in preset temperature threshold；Not only effective solution gas heater in use burns in this way
Temperature fluctuation excessive problem when state changes, and the optimum Working of gas heater can be kept in real time,
The formation of condensed water is avoided, while also achieving and thermostatically controlled purpose in real time is carried out to gas heater at different conditions.
Further, the specified exhaust gas temperature value of lower limit value=gas heater of preset temperature threshold-specified smoke evacuation temperature
Angle value × 10%；The specified exhaust gas temperature value of the upper limit value of preset temperature threshold=gas heater+specified exhaust gas temperature
Value × 10%.
A kind of constant temp gas water heater that the embodiment of the present invention 2 provides, as shown in Figure 3 comprising water heater body 1, cigarette
Gas temperature measuring probe 2, blower 3, according to flue-gas temperature detection probe 2 acquire flue-gas temperature change compressor flow control list
Member 4, blower 3 are arranged in water heater body 1, and flue-gas temperature detection probe 2 is arranged on the exhaust fume collecting hood 11 of water heater body 1,
And the test side of flue-gas temperature detection probe 2 is stretched in exhaust fume collecting hood 11, flue-gas temperature detection probe 2 and blower 3 are single with control
Member 4 is electrically connected the compressor flow for being used for transmission signal and controlling water heater.
After a kind of constant temp gas water heater provided by using the embodiment of the present invention 2, in use, if flue-gas temperature detects
The 2 current flue-gas temperature value of acquisition of probe, if the collected current flue-gas temperature of flue-gas temperature detection probe 2 is located at preset temperature threshold
When in value, then gas heater is without load control system；If the collected current flue-gas temperature of flue-gas temperature detection probe 2 is higher than
When the upper limit value of preset temperature threshold, the signal is fed back to control unit, control unit 4 by flue-gas temperature detection probe 2 at this time
The current compressor flow of gas heater input is reduced according to the signal, so that current flue-gas temperature is located at preset temperature threshold
It is interior；If the collected current flue-gas temperature of flue-gas temperature detection probe 2 is lower than the lower limit value of preset temperature threshold, flue gas at this time
The signal is fed back to control unit 4 by temperature measuring probe 2, and control unit 4 improves what gas heater inputted according to the signal
Current compressor flow, so that current flue-gas temperature is located in preset temperature threshold；Not only effective solution gas and hot water in this way
Device excessive problem of temperature fluctuation when combustion state changes in use, and gas and hot water can be kept in real time
The optimum Working of device, avoids the formation of condensed water, while also achieving and carrying out in fact to gas heater at different conditions
When thermostatically controlled purpose.
Further, flue-gas temperature detection probe 2 is that signal is fed back to, control primary in control unit 4 at interval of 2min
After unit 4 is compared according to continuous 3 times signal values of feedback, then determine gas heater working condition and to the combustion gas
Water heater carries out corresponding control.
Further, corresponding control is carried out to gas heater method particularly includes: to the blower of the gas heater
Flow is controlled.
A kind of control principle for constant temp gas water heater that the embodiment of the present invention 2 provides is as follows:
It burns firstly, a certain proportion of combustion gas enters in the burning cavity in gas heater with air, wherein band
The heat entered mainly includes two parts: one is the physics heat (heat content) brought by combustion gas, air；The second is the chemistry of combustion gas
Heat (calorific value), under conditions of not considering thermal loss, the heat of above-mentioned two o'clock is all used to heat flue gas；And in combustion gas heat
In hydrophone, heat exchanger fin exchanges heat partial heat transmitting water supply, and excess heat is embodied in heat caused by water heater body 1
Loss, last part is the heat for the flue gas being discharged from exhaust fume collecting hood 11；Shown in formula specific as follows,
Hl+Ig+Ia=If
Wherein, Hl is the low heat value of combustion gas；Ig is the physical thermal of combustion gas；Ia is brought into when being dry combustion gas completely burned by air
Physical thermal；If: the enthalpy of the flue gas generated after burning.
The above-mentioned heat balance for before and after fuel gas buring, and ignition temperature is related to calory burning, exchange heat bigger, water heater
1 heat loss of ontology is higher, and it is lower to be embodied in combustion product temperature.
Secondly, fuel gas buring release heat be mainly used for heat combustion product, combustion product number and burning it is abundant
Degree also reflects the variation of flue-gas temperature, and the size of rotation speed of fan control intake, when coefficient of excess air is excessive,
More heats can be taken away, heat loss increases；Shown in formula specific as follows,
Q1+Q2+Q3=Q0
Wherein, Q1 is the heat of discharge；Q2 is the heat that heat-exchange system absorbs；Q3 is the heat that structure itself is lost；Q0
For heat caused by combustion gas under theory.
It can intuitively reflect the relationship of gas heater discharge heat and each section heat, gas and hot water by above-mentioned formula
The exchange capability of heat of fixed heat exchange structure is limited in device, by extraneous factor fluctuation and change, it is specified under heat loss be
The intrinsic heat loss (such as air-tightness, heat exchange material, the difference of heat-insulating heat-preserving material) of gas heater itself, temperature and heat
Conversion by the theoretical formula method in fuel gas buring.
The specific control mode of a kind of constant temp gas water heater that inventive embodiments 2 provide is as follows:
After starting gas heater, gas heater makes its work in suitable load according to water flow value and inflow temperature
Under work, under normal bathing state, when the collected temperature value deviation of flue-gas temperature detection probe 2 is in preset temperature threshold
(its lower limit is specified exhaust gas temperature value × 10% of the specified exhaust gas temperature-of gas heater, and upper limit value is that gas heater is specified
Exhaust gas temperature+specified exhaust gas temperature value × 10%) it is interior when, the control and regulation mode of gas heater is adjusted by normal mode
Section；When the collected temperature value deviation of flue-gas temperature detection probe 2 exceeds preset temperature threshold, control unit receives this letter
After number, gas heater abnormal combustion at this time is determined, then control unit is adjusted the speed according to air quantity of the signal to blower, tool
Body method are as follows:
1) if flue-gas temperature is higher than upper limit value (i.e. the positive deviation) of preset temperature threshold, it is characterized as Q1 raising, combustion gas
The amount of combustion product of the water heater under specified input loading condiction increases, and causes the physical thermal taken away to increase, then needs at this time
The revolving speed (i.e. reduction blower process) for reducing blower 3, reduces one secondary air amount of blower, stablizes burning, flue-gas temperature is examined thereafter
The current flue-gas temperature that probing head 2 continues monitoring discharge keeps this blower if flue-gas temperature is still in preset temperature threshold
Revolving speed, then controlled into normal control mode；
If 2) flue-gas temperature lower than preset temperature threshold lower limit value (i.e. negative bias from) when, be characterized as Q1 reduction, volume combustion
Burning of the gas water heater under specified input loading condiction is insufficient, and substantially Q0 reduces, then needs to improve turning for blower 3 at this time
Speed (i.e. raising blower process), increases by a secondary air amount, guarantees to stablize air capacity required for full combustion under current loads,
Thereafter flue-gas temperature detection probe 2 continues the current flue-gas temperature of monitoring discharge, if flue-gas temperature is still in preset temperature threshold
When, then this rotation speed of fan is kept, then is controlled into normal control mode.
According to the above control principle and control process it is found that the present invention is will test by flue-gas temperature detection probe 2
Flue-gas temperature feed back to control unit water heater made to be in optimum Working, the combustion gas of consumption is corresponding to the heat released
Matching, to effectively avoid gas heater because burning insufficient or heat loss excessive bring water temperature fluctuation being asked
Topic, ensure that temperature persistance, meets power conservation requirement, while also maintaining the optimal combustion state of gas heater.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (5)
1. a kind of control method of constant temp gas water heater, which is characterized in that this method comprises:
Start gas heater, acquires current flue-gas temperature value；
If the current flue-gas temperature is located in preset temperature threshold, the gas heater is without Load Regulation and wind
Machine flow is adjusted；
If the current flue-gas temperature exceeds the preset temperature threshold, the current blower of the gas heater input is adjusted
Flow, so that the current flue-gas temperature is located in the preset temperature threshold.
2. a kind of control method of constant temp gas water heater according to claim 1, which is characterized in that if the current cigarette
When temperature degree exceeds the preset temperature threshold, the current compressor flow of the gas heater input is adjusted, so that described work as
Preceding flue-gas temperature is located in the preset temperature threshold, method particularly includes:
It is defeated by reducing the gas heater if the current flue-gas temperature is higher than the upper limit value of the preset temperature threshold
The current compressor flow entered, so that the current flue-gas temperature is located in the preset temperature threshold；
It is defeated by improving the gas heater if the current flue-gas temperature is lower than the lower limit value of the preset temperature threshold
The current compressor flow entered, so that the current flue-gas temperature is located in the preset temperature threshold.
3. a kind of constant temp gas water heater, which is characterized in that it include water heater body (1), flue-gas temperature detection probe (2),
Blower (3), the control unit (4) for changing compressor flow according to the flue-gas temperature of flue-gas temperature detection probe (2) acquisition, the wind
Machine (3) setting is in water heater body (1), exhaust fume collecting hood of flue-gas temperature detection probe (2) setting in water heater body (1)
(11) on, and the test side of the flue-gas temperature detection probe (2) is stretched in exhaust fume collecting hood (11), the flue-gas temperature detection probe
(2) and blower (3) is electrically connected the compressor flow for being used for transmission signal and controlling water heater with control unit (4).
4. a kind of constant temp gas water heater according to claim 3, which is characterized in that the flue-gas temperature detection probe
(2) to feed back signal in the feedback unit (4) once at interval of 2min, described control unit (4) is according to continuous 3 letters
After number value of feedback compares, then determines the working condition of the gas heater and corresponding control is carried out to the gas heater
System.
5. a kind of constant temp gas water heater according to claim 3 or 4, which is characterized in that the gas heater into
The corresponding control of row method particularly includes: the compressor flow of the gas heater is controlled.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910698657.2A CN110454984A (en) | 2019-07-31 | 2019-07-31 | Control method of constant-temperature gas water heater and gas water heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910698657.2A CN110454984A (en) | 2019-07-31 | 2019-07-31 | Control method of constant-temperature gas water heater and gas water heater |
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ID=68484086
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467965A (en) * | 2020-10-26 | 2021-03-09 | 苏州浪潮智能科技有限公司 | Temperature control method, device and system of multiphase power supply and storage medium |
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| CN103940092A (en) * | 2014-05-08 | 2014-07-23 | 佛山市顺德区奇林电气有限公司 | Combustion heating control device and method used for gas water heater |
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| JPH0252917A (en) * | 1988-08-18 | 1990-02-22 | Toto Ltd | Gas exhausting device for hot water supply apparatus |
| JP2004294030A (en) * | 2003-03-28 | 2004-10-21 | Mitsubishi Electric Corp | Control device of hot air heater |
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| CN112467965A (en) * | 2020-10-26 | 2021-03-09 | 苏州浪潮智能科技有限公司 | Temperature control method, device and system of multiphase power supply and storage medium |
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Application publication date: 20191115 |