CN110906557A - Zero-cold-water gas wall-mounted furnace and control method of anti-freezing mode thereof - Google Patents
Zero-cold-water gas wall-mounted furnace and control method of anti-freezing mode thereof Download PDFInfo
- Publication number
- CN110906557A CN110906557A CN201911014081.XA CN201911014081A CN110906557A CN 110906557 A CN110906557 A CN 110906557A CN 201911014081 A CN201911014081 A CN 201911014081A CN 110906557 A CN110906557 A CN 110906557A
- Authority
- CN
- China
- Prior art keywords
- wall
- bathing
- temperature
- water
- built
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 285
- 238000007710 freezing Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000003287 bathing Methods 0.000 claims abstract description 127
- 238000001514 detection method Methods 0.000 claims description 18
- 239000000523 sample Substances 0.000 claims description 18
- 230000002528 anti-freeze Effects 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- 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)
- Control For Baths (AREA)
Abstract
The invention belongs to the technical field of wall-mounted furnaces, and discloses a zero-cold-water gas wall-mounted furnace and an anti-freezing mode control method thereof. The method comprises the following steps: s1, enabling the wall-hanging stove to be in a standby state; s2, detecting the bath inlet water temperature T at the bath inlet1Or bath water outlet temperature T at bath water outlet2(ii) a S3, judging the temperature T of the bath inlet water1Or the bath water outlet temperature T2Whether or not: t is1＞TmaxOr T2＞TmaxWherein T ismaxIs the maximum value of the antifreezing threshold temperature range in the bathing state: if not, the wall-mounted boiler enters a bathing anti-freezing mode; if yes, the wall-mounted boiler maintains a standby state. The method can automatically and accurately perform anti-freezing control.
Description
Technical Field
The invention belongs to the technical field of wall-mounted furnaces, and particularly relates to a zero-cold-water gas wall-mounted furnace and an anti-freezing mode control method thereof.
Background
The zero-cold-water wall-mounted boiler comprises a wall-mounted boiler body, a heating circulation pipeline and a bathing circulation pipeline. In order to realize zero cold water, a built-in circulating water pump capable of pumping water in a bathing circulating pipeline back into the wall-mounted boiler is usually installed in the wall-mounted boiler body.
If the zero-cold-water function of the zero-cold-water wall-mounted boiler does not work for a long time, water reserved in the bathing circulation pipeline is frozen under the condition of low environmental temperature, for example, in the northeast cold winter, the bathing circulation pipeline can be cracked, and the existing zero-cold-water wall-mounted boiler is not usually subjected to anti-freezing control aiming at the bathing circulation pipeline, so that potential safety hazards are caused.
Disclosure of Invention
In view of the above, the invention provides a control method for an anti-freezing mode of a zero-cold-water gas wall-mounted boiler, aiming at the problem that the existing zero-cold-water wall-mounted boiler has no anti-freezing control on a bathing circulation pipeline.
Another object of the present invention is to provide a wall-mounted zero-cooling water gas boiler.
In order to achieve the purpose, the technical scheme of the invention is realized as follows: a control method for an anti-freezing mode of a zero-cold-water wall-mounted gas boiler comprises the following steps:
s1, enabling the wall-hanging stove to be in a standby state;
s2, detecting the bath inlet water temperature T at the bath inlet1Or bath water outlet temperature T at bath water outlet2；
S3, judging the temperature T of the bath inlet water1Or the bath water outlet temperature T2Whether or not: t is1＞TmaxOr T2＞TmaxWherein T ismaxIs the maximum value of the antifreezing threshold temperature range in the bathing state: if not, the wall-mounted boiler enters a bathing anti-freezing mode; if yes, the wall-mounted boiler maintains a standby state.
Preferably, the method further comprises the steps of:
s5, judging the temperature T of the bath inlet water1Or the bath water outlet temperature T2Whether or not: t is1≤TminOr T2≤TminWherein T isminIs the minimum value of the antifreezing threshold temperature range in the bathing state: if yes, switching the wall-mounted boiler to a bathing second-stage anti-freezing mode, wherein the bathing second-stage anti-freezing mode is that the wall-mounted boiler reports a fault; and if not, a built-in circulating water pump for pumping water in the bathing circulating pipeline back to the wall-mounted furnace is started, and the wall-mounted furnace is switched to a bathing first-stage anti-freezing mode.
Preferably, in S5, the switching to the bathing primary antifreezing mode includes the following steps:
s51, detecting the water outlet flow velocity V at the bathing water outlet0And judging whether the water outlet flow velocity V exists within a first time threshold value when the built-in circulating water pump is started0Satisfies the following conditions: v0≥V1Said V is1Is a first flow rate threshold in a bathing state: if not, the built-in circulating water pump stops running, and the wall-mounted boiler reports a fault; if yes, igniting a combustor of the wall-mounted furnace after the built-in circulating water pump is started for a second time threshold;
s52, detecting the bath water outlet temperature T in real time after the burner is ignited2And judging the bathing water outlet temperature T within the third time threshold2Whether or not: t is2More than preset temperature +7+ (preheating temperature threshold-preset temperature)/5: if yes, go to S521; if not, go to S522;
s521, after the burner is flamed out and the built-in circulating water pump keeps running for a fourth time threshold, judging the bathing inflow water temperature T1Whether or not: t is1< the preset temperature:
if yes, the burner is re-ignited, and the step S52 is repeated;
if not, the built-in circulating water pump stops running within a fifth time threshold, and the wall-mounted boiler exits the first-stage bathing anti-freezing mode;
s522, after judging that the burner is ignited to burn for a sixth time threshold, continuing to make the bath inlet water temperature T within a seventh time threshold1Whether or not: t is1Is greater than enteringWater temperature threshold:
if so, stopping the operation of the built-in circulating water pump within a fifth time threshold, and exiting the first-stage bathing anti-freezing mode by the wall-mounted boiler;
if not, S52 is repeated.
Preferably, in S3, the method further comprises the steps of:
s4, judging the preset temperature T of the wall-hanging stovePreset ofWhether or not: t isPreset ofTemperature threshold for preheating:
if yes, the preset temperature T is setPreset ofAutomatically decreasing to the preheat temperature threshold; and if not, the wall-mounted boiler enters a bathing anti-freezing mode.
Preferably, in S51, the method further includes, after the burner of the wall-hanging stove is ignited, the steps of:
s511, judging the water outlet flow velocity V0Whether or not: v0＜V2Said V is2Second flow rate threshold for bathing: if yes, S5111 is carried out; if not, S5112 is carried out;
s5111, the built-in circulating water pump continues to operate;
and S5112, automatically reducing the power of the built-in circulating water pump, and then continuously repeating S51.
Preferably, S5112 further comprises the steps of:
judging whether the total number n of times of automatic power reduction of the built-in circulating water pump meets the following requirements: n is more than N, wherein N is a total time threshold value of automatic power reduction of the built-in circulating water pump;
if not, continuing to repeat S511;
if yes, judging the actual power Q of the built-in circulating water pump after the power is automatically reducedPractice of' whether or not: qPractice of’≤QRated value-(15％～25％)×QPractice ofWherein Q isRated valueIs rated power, Q, of the built-in circulating water pumpPractice ofIs the power of the built-in circulating water pump at the time of starting, and QPractice of≤QRated value(ii) a If not, the built-in circulating water pump continues to automatically reduce the power; if so, thenS5111 is performed.
Preferably, the power of the internal circulating water pump is reduced by 5% each time.
Preferably, S522 further includes the steps of:
s522, judging whether the bathing inlet water temperature T1 in a seventh time threshold meets the following conditions after the combustor is ignited to burn for a sixth time threshold: t1 > Water entry temperature threshold:
if so, stopping the operation of the built-in circulating water pump within a fifth time threshold, and exiting the first-stage bathing anti-freezing mode by the wall-mounted boiler;
if not, go to S5221;
s5221, judging whether the bathing inlet water temperature T1 meets the following conditions after the built-in circulating water pump keeps operating for the eighth time threshold: t1 > Water entry temperature threshold:
if so, stopping running of the built-in circulating water pump within a fifth time threshold, and exiting the first-stage bathing anti-freezing mode by the wall-mounted boiler;
if not, judging the effluent flow velocity V0Whether or not: v0≥V1: if yes, repeating S52; if not, the burner is flamed out, and the outlet water flow velocity V is judged again after the built-in circulating water pump keeps operating for the ninth time threshold0Whether or not: v0≥V1: if yes, the combustor is reignited, and S52 is repeated; if not, the built-in circulating water pump is closed, and the wall-mounted boiler reports a fault.
Preferably, the wall-mounted boiler exiting the first-stage bathing antifreezing mode further comprises the following steps:
s53, judging whether the wall hanging furnace is in a cold standby state:
if yes, the wall-mounted boiler maintains a first-stage bathing anti-freezing mode within a tenth time threshold;
if not, judging the effluent flow velocity V0Whether or not: v0≥V1 Bar: if yes, switching the wall-mounted boiler into a shower state; if not, the wall-mounted boiler is recovered to a hot standby state.
Preferably, the anti-freezing threshold temperature range is 1-5 ℃.
The invention also provides a zero-cold-water gas wall-mounted boiler which comprises a wall-mounted boiler body and a bathing circulation pipeline, wherein one end of the bathing circulation pipeline is connected with a bathing water inlet of the wall-mounted boiler body, the other end of the bathing circulation pipeline is connected with a bathing water outlet of the wall-mounted boiler body, a water inlet temperature detection probe is arranged at the bathing water inlet, a water outlet temperature detection probe is arranged at the bathing water outlet, and a water flow speed detection probe is also arranged at the bathing water outlet;
the water inlet temperature detection probe, the water outlet temperature detection probe and the water flow speed detection probe are electrically connected with the controller of the wall-mounted furnace body.
Compared with the prior art, the control method of the anti-freezing mode has the beneficial effects that by adopting the scheme, the control method of the anti-freezing mode has the following steps:
the wall-mounted boiler needs to be controlled in an anti-freezing mode when in a standby state, and the bathing water inlet temperature T at the bathing water inlet is detected1Or bath water outlet temperature T at bath water outlet2(ii) a Then judging the temperature T of the bath inlet water1Or bath water outlet temperature T2Whether or not: t is1＞TmaxOr T2＞TmaxAnd the wall-mounted boiler can automatically enter a bathing anti-freezing mode. Because of TmaxThe maximum value of the first-stage bath antifreezing threshold temperature range in the bath state, namely, the first-stage bath antifreezing threshold temperature range is the temperature range pre-stored in the wall-mounted furnace in advance and only has T1Or T2Less than or equal to TmaxIn time, the wall-mounted boiler can be subjected to anti-freezing control.
Compared with the prior art, the zero-cold-water gas wall-mounted boiler can monitor the bath inlet water temperature, the bath outlet water temperature and the bath outlet water flow rate in real time, so that the wall-mounted boiler can conveniently control the working mode of the wall-mounted boiler according to real-time detection data.
Drawings
Fig. 1 is a schematic structural view of a zero-cold-water wall-mounted gas boiler provided in embodiment 2 of the present invention;
fig. 2 is a general working flow chart of a control method of an anti-freezing mode of a zero-cold-water gas wall-hanging stove according to embodiment 1 of the present invention;
fig. 3 is a first flowchart of a method for controlling an anti-freezing mode of a zero-cold-water gas wall-hanging stove according to embodiment 1 of the present invention;
fig. 4 is a second flowchart of a control method for an anti-freezing mode of a zero-cold-water gas wall-hanging stove according to embodiment 1 of the present invention;
fig. 5 is a third flowchart illustrating a control method for an anti-freezing mode of a zero-cold-water wall-mounted gas boiler according to embodiment 1 of the present invention;
fig. 6 is a fourth flowchart of a control method of the antifreeze mode of the zero-cold-water gas wall-hanging stove according to embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment provides a control method for an anti-freezing mode of a zero-cold-water wall-mounted gas boiler, as shown in fig. 2, the method includes the following steps:
s1, enabling the wall-hanging stove to be in a standby state;
s2, detecting the bath inlet water temperature T at the bath inlet1Or bath water outlet temperature T at bath water outlet2；
S3, judging the temperature T of the bath inlet water1Or the bath water outlet temperature T2Whether or not: t is1＞TmaxOr T2＞TmaxWherein T ismaxIs the maximum value of the bath first-grade antifreezing threshold temperature range under the bath state: if not, the wall-mounted boiler enters a bathing anti-freezing mode; if yes, the wall-mounted boiler maintains a standby state.
Wherein, the bathing first-stage antifreezing threshold temperature range is the temperature pre-stored in the controller of the wall-hanging stove in advance.
The controller in this embodiment may adopt various units that can implement adjustable digital signals, such as various unit machines, microcontrollers, DSPs (digital signal processors), and FPGAs (field programmable gate arrays).
In this embodiment, the controller can adopt the singlechip, can realize various control functions through programming the singlechip, for example in this embodiment, realize functions such as judgement, control, processing, can realize hanging stove operating condition's automatic switch-over, the singlechip has the advantage that makes things convenient for the interface to call, is convenient for control.
The wall-mounted boiler needs to be controlled in an anti-freezing mode when in a standby state, and the bathing water inlet temperature T at the bathing water inlet is detected1Or bath water outlet temperature T at bath water outlet2(ii) a Then judging the temperature T of the bath inlet water1Or bath water outlet temperature T2Whether or not: t is1＞TmaxOr T2＞TmaxAnd the wall-mounted boiler can automatically enter a bathing anti-freezing mode. Because of TmaxThe maximum value of the first-stage bath antifreezing threshold temperature range in the bath state is adopted, and the first-stage bath antifreezing threshold temperature range is the temperature range pre-stored in the wall-mounted furnace in advance, namely only T1Or T2Less than or equal to TmaxIn time, the wall-mounted boiler can be subjected to anti-freezing control, so that the anti-freezing control is realized.
In a specific embodiment, as shown in fig. 3, the method further comprises the steps of:
s5, judging the temperature T of the bath inlet water1Or bath water outlet temperature T2Whether or not: t is1≤TminOr T2≤TminWherein T isminIs the minimum value of the bath first-grade antifreezing threshold temperature range in the bath state: if so, switching the wall-mounted boiler into a bathing second-stage anti-freezing mode, and reporting a fault for the wall-mounted boiler; if not, a built-in circulating water pump for pumping water in the bathing pipeline back to the wall-mounted furnace is started, and the wall-mounted furnace is switched to a bathing first-stage anti-freezing mode.
In the embodiment, the bathing secondary antifreezing mode is that the wall-hanging stove reports an E0 fault.
The built-in circulating water pump for pumping water in the bathing pipeline back to the wall-mounted boiler can be an alternating-current water pump or a direct-current water pump, and is usually operated at the maximum power when being started.
That is, the freeze protection mode of the present embodiment includes a primary freeze protection mode and a secondary freeze protection mode, which enables more optimal control of the freeze protection mode.
In a specific embodiment, as shown in fig. 3, the switching to the bathing first-stage antifreezing mode in S5 includes the following steps:
s51, detecting the water outlet flow velocity V at the bathing water outlet0And judging whether the water outlet flow velocity V exists within a first time threshold value when the built-in circulating water pump is started0Satisfies the following conditions: v0≥V1，V1Is a first flow rate threshold in a bathing state: if not, the built-in circulating water pump stops running, and the wall-mounted boiler reports a fault; if yes, igniting a combustor of the wall-mounted furnace after a built-in circulating water pump starts a second time threshold;
s52, detecting the bath water outlet temperature T in real time after the burner is ignited2And judging the bath water outlet temperature T within a third time threshold2Whether or not: t is2More than preset temperature +7+ (preheating temperature threshold-preset temperature)/5: if yes, go to S521; if not, go to S522;
s521, judging the bathing water inlet temperature T after the burner is flamed out and the built-in circulating water pump operates for a fourth time threshold in a delayed mode1Whether or not: t is1< the preset temperature:
if yes, the burner is re-ignited, and the step S52 is repeated;
if not, the built-in water pump stops running within a fifth time threshold, and the wall-mounted furnace exits the first-stage bathing anti-freezing mode;
s522, judging the bathing inflow water temperature T within a seventh time threshold after the combustor is ignited and combusted for a sixth time threshold1Whether or not: t is1Water inlet temperature threshold:
if so, stopping running of the built-in circulating water pump within a fifth time threshold, and exiting the first-stage bathing anti-freezing mode by the wall-mounted boiler;
if not, S52 is repeated.
In this embodiment, V1Is a first flow rate threshold value in the bathing state, which actually represents the minimum flow rate in the bathing state, in this embodiment V1＝2.5L/min。
The first time threshold is the time preset in the wall-hanging stove controller in advance, as long as the water outlet flow speed V exists in the first time threshold0Satisfies the following conditions: v0≥V1If the water level in the bathing circulation pipeline is lower than the set water level, the built-in circulation water pump can be started, otherwise, the built-in circulation water pump cannot be started, and the wall-mounted boiler reports an E0 fault; if the condition is not met, the built-in circulating water pump is forcibly started, and the built-in circulating water pump may be damaged. That is, the anti-freezing control can be performed only after the condition that the built-in circulating water pump can be started is satisfied.
The second time threshold is greater than the first time threshold, for example, the second time threshold in this embodiment may be 10s, and the first time threshold may be 8 s. Because after judging built-in circulating water pump can start, built-in circulating water pump continues to operate for 2s, the combustor ignition burning, further guarantee like this that bathing circulating line rivers are unobstructed, the combustor ignition this moment, the effectual condition of avoiding appearing dry combustion method.
During anti-freezing control, the bath outlet water temperature T is detected in real time2And judging the bath water outlet temperature T within the third time threshold2Whether or not: t is2> predetermined temperature +7+ (preheating temperature threshold-predetermined temperature)/5. After the burner is ignited and combusted, because the bathing circulation pipelines are longer, the temperature of some pipelines is lower, and the temperature of some pipelines is higher, in order to ensure the accuracy of the judgment condition and avoid misjudgment, the bathing water outlet temperature T within the continuous third time threshold value needs to be judged2Whether or not: t is2> predetermined temperature +7+ (preheating temperature threshold-predetermined temperature)/5.
In this embodiment, the third time threshold may be 5s, that is, the bathing water temperature T lasting for 5s is determined2Whether or not: t is2> predetermined temperature +7+ (preheating temperature threshold-predetermined temperature)/5. If so, the whole bathing circulation pipeline is heated. If it is thirdIf the time threshold is too long, waste of gas and electric energy is caused.
In this embodiment, the preheating temperature threshold is also a time pre-stored in the controller of the wall-hanging stove in advance, and may be 50 ℃.
The preset temperature is a temperature value preset by a user through a control panel of the wall-mounted boiler.
After the burner is flamed off in S521, the built-in circulating water pump keeps operating for a fourth time threshold, and then the bathing inlet water temperature T is judged1Whether or not: t is1< the preset temperature: if the temperature is satisfied, the water inlet temperature T of the bathing circulation pipeline is determined1And the temperature is low, ignition and combustion are required again, and the constant water temperature in the bathing circulation pipeline is ensured when the anti-freezing mode control is carried out. If not, the temperature T of the inlet water of the bathing circulation pipeline is indicated1Higher, no ignition is required to maintain water temperature.
The fourth time threshold is a value pre-stored in the controller in advance, and can be any value larger than zero. For example, the fourth time threshold in this embodiment is 10s, because the built-in circulating water pump keeps running for 10s, so that the water in the bathing circulation pipeline can circulate at least one circle. Conversely, the fourth time threshold is the time required for the water in the bathing circulation pipeline to circulate for one circle after the built-in water circulation pump is started.
The fifth time threshold is a time pre-stored in the controller of the wall-hanging stove in advance, and can be any time greater than or equal to zero seconds. In this embodiment, the fifth time threshold may be 5 s. The purpose of requiring the built-in circulating water pump to stop running within the fifth time threshold is to ensure that the built-in circulating water pump is prevented from immediately stopping running, so that the built-in circulating water pump is prevented from being damaged.
In S522, the sixth time threshold and the seventh time threshold are both preset in the controller in advance.
In this embodiment, the bath water temperature T lasts for 5s2Does not satisfy: t is2When the temperature is higher than the preset temperature plus 7+ (the preheating temperature threshold value-the preset temperature)/5, the combustor continues to burn for a sixth time threshold value, and then heat is provided for the bathing circulation pipeline, wherein the sixth time threshold value in the embodiment can be 20 s;then judging the bathing water inlet temperature T within the seventh time threshold1Whether or not: t is1A water inlet temperature threshold, wherein the seventh time threshold may be 5s, in order to ensure a detected bath water inlet temperature T1The accuracy of (2). Because some pipelines in the bathing circulation pipeline have high temperature and some pipelines have low temperature in the anti-freezing mode, only the bathing inlet water temperature T within the seventh time threshold is judged1Satisfies the following conditions: t is1When the temperature is higher than the water inlet temperature threshold value, the water in the whole bathing circulation pipeline is completely heated, and the anti-freezing effect is realized.
In this embodiment, the inlet water temperature threshold may be 15 ℃, when the bathing inlet water temperature T is higher than the bathing inlet water temperature T1Satisfies the following conditions: t is1When the temperature is higher than the water inlet temperature threshold value, the water temperature in the bathing circulation pipeline is higher than 15 ℃, and the antifreezing effect is achieved.
In a specific embodiment, as shown in fig. 4, the method further comprises the steps of:
s4, judging the preset temperature T of the wall-hanging furnacePreset ofWhether or not: t isPreset ofTemperature threshold for preheating:
if yes, presetting the temperature TPreset ofAutomatically decreasing to the preheat temperature threshold; if not, the wall-mounted boiler enters a bathing anti-freezing mode.
The purpose is to prevent the user from being scalded by sudden water discharge when the user operates in the anti-freezing mode.
In a specific embodiment, as shown in fig. 5, in S51, the method further includes, after the burner of the wall-hanging stove is ignited, the steps of:
s511, judging the water outlet flow velocity V0Whether or not: v0＜V2Said V is2Second flow rate threshold for bathing: if yes, S5111 is carried out; if not, S5112 is carried out;
s5111, the built-in circulating water pump continues to operate;
and S5112, automatically reducing the power of the built-in circulating water pump, and then continuously repeating the step S511.
Wherein the second flow rate threshold value V2Greater than a first flow rate threshold V1. In this embodiment, the second streamVelocity threshold V2May be 4L/min, the second flow rate threshold V2Is selected according to the built-in circulating water pump, i.e. at the second flow rate threshold V2The built-in circulating water pump is in an optimal working state. In this embodiment, the internal circulating water pump is a 6m DC pump, so V2Is 4L/min.
The purpose of S511 is to ensure that the built-in circulating water pump operates in a better working state under the condition of meeting the requirement of the designed flow rate, and prevent the noise from being overlarge.
Because if V0≥V2If the power of the built-in circulating water pump is reduced, the controller of the wall-mounted boiler automatically controls the reduction of the power of the built-in circulating water pump; if V0＜V2The practical working power of the built-in circulating water pump is proper, and the built-in circulating water pump continues to operate without large noise under the condition of meeting the flow requirement.
In a specific embodiment, as shown in fig. 6, S5112 further includes the following steps:
judging whether the total number n of times of automatic power reduction of the built-in circulating water pump meets the following requirements: n is greater than N, wherein the N is a total time threshold value of automatic power reduction of the built-in circulating water pump;
if not, continuing to repeat S511;
if yes, the actual power Q of the built-in circulating water pump after the power is automatically reduced is judgedPractice of' whether or not: qPractice of’≤QRated value-(15％～25％)×QPractice ofWherein Q isRated valueRated power, Q, of built-in circulating water pumpsPractice ofIs the power of the built-in circulating water pump at the time of starting, and QPractice of≤QRated value(ii) a If not, the built-in circulating water pump continues to automatically reduce the power; if so, S5111 is performed.
In this embodiment, the total number threshold of times that the power of the N-embedded circulating water pump is automatically reduced is a value preset in the controller of the wall-hanging stove in advance, for example, N in this embodiment may be any positive integer greater than or equal to 0, and may be, for example, 3 times or 5 times.
When the total number n of times of automatic reduction of the power of the built-in circulating water pump meets the following conditions: when N is more than N, the actual power Q of the built-in circulating water pump after the power is automatically reduced needs to be judgedPractice of' whether or not: qPractice of’≤QRated value-(15％～25％)×QPractice ofThe purpose is to avoid the built-in water pump from infinitely reducing and ensure the smooth operation of the working process.
In the specific embodiment, the power of the built-in circulating water pump is reduced by 5% each time, because if the power is reduced by a large amount at a time, for example, the power is reduced by 20% at a time, the built-in circulating water pump may be damaged, thereby reducing the service life of the built-in circulating water pump; it is also possible to cause the effluent flow rate V0 < V1. If the work reduction at one time is small, the circulation is needed for many times, and the time is wasted.
In a specific embodiment, as shown in fig. 5 and 6, S522 further includes the following steps:
s522, judging whether the bathing inlet water temperature T1 in a seventh time threshold meets the following conditions after the combustor is ignited to burn for a sixth time threshold: t1 > Water entry temperature threshold:
if so, stopping the operation of the built-in circulating water pump within a fifth time threshold, and exiting the first-stage bathing anti-freezing mode by the wall-mounted boiler;
if not, go to S5221;
s5221, judging whether the bathing inlet water temperature T1 meets the following conditions after the built-in circulating water pump keeps operating for the eighth time threshold: t1 > Water entry temperature threshold:
if so, stopping running of the built-in circulating water pump within a fifth time threshold, and exiting the first-stage bathing anti-freezing mode by the wall-mounted boiler;
if not, judging the effluent flow velocity V0Whether or not: v0≥V1: if yes, repeating S52; if not, the burner is flamed out, and the outlet water flow velocity V is judged again after the built-in circulating water pump keeps operating for the ninth time threshold0Whether or not: v0≥V1: if yes, the combustor is reignited, and S52 is repeated; if not, the built-in part is arrangedAnd (4) closing the circulating water pump, and reporting faults by the wall-mounted boiler.
In this embodiment, S5221 is performed to avoid the phenomenon that T1 cannot satisfy T1 > the inlet water temperature threshold (15 ℃) all the time due to damage of the wall-hanging stove.
Because if the wall-mounted furnace is damaged, the burner is ignited to burn, and the T1 can not meet the condition that T1 is larger than the water inlet temperature threshold, the waste of fuel gas is caused, and even the wall-mounted furnace is further damaged.
In the present embodiment, the flow velocity V of the effluent is performed twice in S52210And V1The purpose of the judgment is to further eliminate the risk of misjudgment and avoid the failure of the wall-hanging stove due to the misjudgment.
The eighth time threshold and the ninth time threshold are times preset in advance in the controller of the wall-hanging stove, and they may be any times greater than zero. In this embodiment, the eighth time threshold may be 10min, and the ninth time threshold may be 5 min. The purpose of the eighth time threshold is to prevent the built-in circulating water pump from running all the time. And the ninth time threshold is used to further avoid the risk of misjudgment.
In a specific embodiment, as shown in fig. 5 and 6, the exiting of the first-stage bathing antifreezing mode by the wall-hanging stove further comprises the following steps:
s53, judging whether the wall-mounted furnace is in a cold standby state:
if yes, the wall-mounted boiler maintains a first-stage bathing anti-freezing mode within a tenth time threshold;
if not, judging the effluent flow velocity V0Whether or not: v0≥V1: if yes, the wall-mounted boiler is switched to a shower state; if not, the wall-mounted boiler returns to the hot standby state.
The tenth time threshold is a time preset in the controller of the wall-hanging stove in advance, and in this embodiment, the tenth time threshold may be 10 min. The purpose of doing so is to further prevent the bathing circulation pipeline from freezing when in a cold standby state. Furthermore, the effluent flow velocity V is judged again0Whether or not: v0≥V1The purpose is according to the water outlet flow velocity V0The wall-mounted stove is automatically switched into a shower shapeAnd the state improves the experience of the user.
In the present example, the freeze protection threshold temperature is in the range of 1 ℃ to 5 ℃, then Tmax＝5℃，Tmin＝1℃。
Example 2
The embodiment provides a zero-cold-water gas wall-mounted furnace, as shown in fig. 1, which comprises a wall-mounted furnace body 1 and a bathing circulation pipeline, wherein one end of the bathing circulation pipeline is connected with a bathing water inlet of the wall-mounted furnace body 1, the other end of the bathing circulation pipeline is connected with a bathing water outlet of the wall-mounted furnace body 1, a water inlet temperature detection probe 2 for detecting the temperature of water flowing into the wall-mounted furnace body 1 is arranged at the bathing water inlet, a water outlet temperature detection probe 3 for detecting the temperature of water flowing out of the wall-mounted furnace body 1 is arranged at the bathing water outlet, and a water flow speed detection probe for detecting the water flow speed of the wall-;
the water inlet temperature detection probe 2, the water outlet temperature detection probe 3 and the water flow speed detection probe are electrically connected with the controller of the wall-mounted furnace body 1.
The zero-cold-water gas wall-mounted boiler can monitor the bathing water inlet temperature, the bathing water outlet temperature and the bathing water outlet flow rate in real time, and therefore the wall-mounted boiler can conveniently control the working mode of the wall-mounted boiler according to real-time detection data.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. A control method for an anti-freezing mode of a zero-cold-water wall-mounted gas boiler is characterized by comprising the following steps of:
s1, enabling the wall-hanging stove to be in a standby state;
s2, detecting the bath inlet water temperature T at the bath inlet1Or bath water outlet temperature T at bath water outlet2；
S3, judging the temperature T of the bath inlet water1Or the bath water outlet temperature T2Whether or not: t is1＞TmaxOr T2＞TmaxWherein T ismaxIs the maximum value of the antifreezing threshold temperature range in the bathing state: if not, the wall-mounted boiler enters a bathing anti-freezing mode; if yes, the wall-mounted boiler maintains a standby state.
2. The method for controlling the freeze protection mode of the zero-cold-water gas wall-hanging stove according to claim 1, further comprising the steps of:
s5, judging the temperature T of the bath inlet water1Or the bath water outlet temperature T2Whether or not: t is1≤TminOr T2≤TminWherein T isminIs the minimum value of the antifreezing threshold temperature range in the bathing state: if yes, the wall-mounted boiler is switched to a bathing secondary anti-freezing mode; and if not, a built-in circulating water pump for pumping water in the bathing circulating pipeline back to the wall-mounted furnace is started, and the wall-mounted furnace is switched to a bathing first-stage anti-freezing mode.
3. The method for controlling the antifreeze mode of the zero-cold-water gas wall-hanging stove as claimed in claim 2, wherein in S5, the switching to the bath primary antifreeze mode includes the steps of:
s51, detecting the water outlet flow velocity V at the bathing water outlet0And judging whether the water outlet flow velocity V exists within a first time threshold value when the built-in circulating water pump is started0Satisfies the following conditions: v0≥V1Said V is1Is a first flow rate threshold in a bathing state: if not, the built-in circulating water pump stops running, and the wall-mounted boiler reports a fault; if yes, igniting a combustor of the wall-mounted furnace after the built-in circulating water pump is started for a second time threshold;
s52, detecting the bath water outlet temperature T in real time after the burner is ignited2And judging the bathing water outlet temperature T within the third time threshold2Whether or not: t is2More than preset temperature +7+ (preheating temperature threshold-preset temperature)/5: if yes, go to S521; if not, go to S522;
s521, after the burner is flamed out and the built-in circulating water pump keeps running for a fourth time threshold, judging the bathing inflow water temperature T1Whether or not: t is1< the preset temperature:
if yes, the burner is re-ignited, and the step S52 is repeated;
if not, the built-in circulating water pump stops running within a fifth time threshold, and the wall-mounted boiler exits the first-stage bathing anti-freezing mode;
s522, after judging that the burner is ignited to burn for a sixth time threshold, continuing to make the bath inlet water temperature T within a seventh time threshold1Whether or not: t is1Water inlet temperature threshold:
if so, stopping the operation of the built-in circulating water pump within a fifth time threshold, and exiting the first-stage bathing anti-freezing mode by the wall-mounted boiler;
if not, S52 is repeated.
4. The method for controlling the antifreezing mode of the zero-cold-water gas wall-hanging stove as claimed in claim 1, wherein the step of entering the bathing antifreezing mode of the wall-hanging stove further comprises:
s4, judging the preset temperature T of the wall-hanging stovePreset ofWhether or not: t isPreset ofTemperature threshold for preheating:
if yes, the preset temperature T is setPreset ofAutomatically decreasing to the preheat temperature threshold; and if not, the wall-mounted boiler enters a bathing anti-freezing mode.
5. The method for controlling the antifreeze mode of the zero-cold-water gas wall-hanging stove according to claim 3, wherein in step S51, the method further comprises the following steps after the burner of the wall-hanging stove is ignited:
s511, judging the water outlet flow velocity V0Whether or not: v0＜V2Said V is2Second flow rate threshold for bathing: if yes, S5111 is carried out;if not, S5112 is carried out;
s5111, the built-in circulating water pump continues to operate;
and S5112, automatically reducing the power of the built-in circulating water pump, and then continuously repeating S51.
6. The control method of the antifreeze mode of the zero-cold-water gas wall-hanging stove according to claim 5, wherein the S5112 further comprises the steps of:
judging whether the total number n of times of automatic power reduction of the built-in circulating water pump meets the following requirements: n is more than N, wherein N is a total time threshold value of automatic power reduction of the built-in circulating water pump;
if not, continuing to repeat S511;
if yes, judging the actual power Q of the built-in circulating water pump after the power is automatically reducedPractice of' whether or not: qPractice of’≤QRated value-(15％～25％)×QPractice ofWherein Q isRated valueIs rated power, Q, of the built-in circulating water pumpPractice ofIs the power of the built-in circulating water pump at the time of starting, and QPractice of≤QRated value(ii) a If not, the built-in circulating water pump continues to automatically reduce the power; if so, S5111 is performed.
7. The method for controlling the antifreeze mode of the zero-cold-water gas wall-hanging stove, according to claim 5, wherein the power of the built-in circulating water pump is reduced by 5% at a time.
8. The method for controlling the freeze prevention mode of the zero-cold-water gas wall-hanging stove according to claim 3, wherein the step S522 further comprises the steps of:
s522, judging whether the bathing inlet water temperature T1 in a seventh time threshold meets the following conditions after the combustor is ignited to burn for a sixth time threshold: t1 > Water entry temperature threshold:
if so, stopping the operation of the built-in circulating water pump within a fifth time threshold, and exiting the first-stage bathing anti-freezing mode by the wall-mounted boiler;
if not, go to S5221;
s5221, judging whether the bathing inlet water temperature T1 meets the following conditions after the built-in circulating water pump keeps operating for the eighth time threshold: t1 > Water entry temperature threshold:
if so, stopping running of the built-in circulating water pump within a fifth time threshold, and exiting the first-stage bathing anti-freezing mode by the wall-mounted boiler;
if not, judging the effluent flow velocity V0Whether or not: v0≥V1: if yes, repeating S52; if not, the burner is flamed out, and the outlet water flow velocity V is judged again after the built-in circulating water pump keeps operating for the ninth time threshold0Whether or not: v0≥V1: if yes, the combustor is reignited, and S52 is repeated; if not, the built-in circulating water pump is closed, and the wall-mounted boiler reports a fault.
9. The method for controlling the antifreeze mode of the zero-cold-water gas wall-hanging stove according to claim 3, wherein the wall-hanging stove exiting the bath first-stage antifreeze mode further comprises the steps of:
s53, judging whether the wall hanging furnace is in a cold standby state:
if yes, the wall-mounted boiler maintains a first-stage bathing anti-freezing mode within a tenth time threshold;
if not, judging the effluent flow velocity V0Whether or not: v0≥V1 Bar: if yes, switching the wall-mounted boiler into a shower state; if not, the wall-mounted boiler is recovered to a hot standby state.
10. The method for controlling the antifreezing mode of the zero-cold-water gas wall-hanging stove as claimed in claim 1, wherein the antifreezing threshold temperature ranges from 1 ℃ to 5 ℃.
11. A zero-cold-water gas wall-mounted furnace comprises a wall-mounted furnace body (1) and a bathing circulation pipeline, wherein one end of the bathing circulation pipeline is connected with a bathing water inlet of the wall-mounted furnace body (1), and the other end of the bathing circulation pipeline is connected with a bathing water outlet of the wall-mounted furnace body (1), and the wall-mounted furnace is characterized in that a water inlet temperature detection probe (2) is arranged at the bathing water inlet, a water outlet temperature detection probe (3) is arranged at the bathing water outlet, and a water flow speed detection probe is also arranged at the bathing water outlet;
the water inlet temperature detection probe (2), the water outlet temperature detection probe (3) and the water flow speed detection probe are electrically connected with the controller of the wall-hanging stove body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911014081.XA CN110906557B (en) | 2019-10-23 | 2019-10-23 | Zero-cold-water gas wall-mounted furnace and control method of anti-freezing mode thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911014081.XA CN110906557B (en) | 2019-10-23 | 2019-10-23 | Zero-cold-water gas wall-mounted furnace and control method of anti-freezing mode thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110906557A true CN110906557A (en) | 2020-03-24 |
| CN110906557B CN110906557B (en) | 2021-10-22 |
Family
ID=69815053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911014081.XA Active CN110906557B (en) | 2019-10-23 | 2019-10-23 | Zero-cold-water gas wall-mounted furnace and control method of anti-freezing mode thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110906557B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111664573A (en) * | 2020-07-08 | 2020-09-15 | 珠海格力电器股份有限公司 | Anti-freezing control method and device for gas water heater |
| CN113432306A (en) * | 2021-07-21 | 2021-09-24 | 华帝股份有限公司 | Anti-freezing control method for gas water heater and gas water heater |
| CN114719446A (en) * | 2022-04-01 | 2022-07-08 | 广东万家乐燃气具有限公司 | Control method for controlling wall-mounted furnace heating and bathing switching overtemperature and wall-mounted furnace |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5869351A (en) * | 1981-10-20 | 1983-04-25 | Matsushita Electric Ind Co Ltd | Anti-freezing device for hot water feeder |
| CN201327115Y (en) * | 2008-09-22 | 2009-10-14 | 广东万家乐燃气具有限公司 | Integrated central hot water system |
| CN202757269U (en) * | 2012-07-31 | 2013-02-27 | 青岛经济技术开发区海尔热水器有限公司 | Two-level freeze-proof gas water heater |
| CN202853173U (en) * | 2012-10-16 | 2013-04-03 | 潍坊高新区领航电气科技促进中心 | Novel freeze proof device of solar energy water heater |
| CN202973561U (en) * | 2012-11-05 | 2013-06-05 | 中山华帝燃具股份有限公司 | Gas water heater with antifreezing function |
| KR20130092147A (en) * | 2012-02-10 | 2013-08-20 | 린나이코리아 주식회사 | Method for preventing freezing of gas heater |
| CN205807847U (en) * | 2016-05-27 | 2016-12-14 | 九阳股份有限公司 | A kind of anti-freezing gas water heater |
| CN106556150A (en) * | 2015-09-30 | 2017-04-05 | 青岛经济技术开发区海尔热水器有限公司 | A kind of water heater control method and water heater |
| CN207335132U (en) * | 2017-08-22 | 2018-05-08 | 樱花卫厨（中国）股份有限公司 | Gas heater with antifreeze and pre- hot function |
-
2019
- 2019-10-23 CN CN201911014081.XA patent/CN110906557B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5869351A (en) * | 1981-10-20 | 1983-04-25 | Matsushita Electric Ind Co Ltd | Anti-freezing device for hot water feeder |
| CN201327115Y (en) * | 2008-09-22 | 2009-10-14 | 广东万家乐燃气具有限公司 | Integrated central hot water system |
| KR20130092147A (en) * | 2012-02-10 | 2013-08-20 | 린나이코리아 주식회사 | Method for preventing freezing of gas heater |
| CN202757269U (en) * | 2012-07-31 | 2013-02-27 | 青岛经济技术开发区海尔热水器有限公司 | Two-level freeze-proof gas water heater |
| CN202853173U (en) * | 2012-10-16 | 2013-04-03 | 潍坊高新区领航电气科技促进中心 | Novel freeze proof device of solar energy water heater |
| CN202973561U (en) * | 2012-11-05 | 2013-06-05 | 中山华帝燃具股份有限公司 | Gas water heater with antifreezing function |
| CN106556150A (en) * | 2015-09-30 | 2017-04-05 | 青岛经济技术开发区海尔热水器有限公司 | A kind of water heater control method and water heater |
| CN205807847U (en) * | 2016-05-27 | 2016-12-14 | 九阳股份有限公司 | A kind of anti-freezing gas water heater |
| CN207335132U (en) * | 2017-08-22 | 2018-05-08 | 樱花卫厨（中国）股份有限公司 | Gas heater with antifreeze and pre- hot function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111664573A (en) * | 2020-07-08 | 2020-09-15 | 珠海格力电器股份有限公司 | Anti-freezing control method and device for gas water heater |
| CN113432306A (en) * | 2021-07-21 | 2021-09-24 | 华帝股份有限公司 | Anti-freezing control method for gas water heater and gas water heater |
| CN114719446A (en) * | 2022-04-01 | 2022-07-08 | 广东万家乐燃气具有限公司 | Control method for controlling wall-mounted furnace heating and bathing switching overtemperature and wall-mounted furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110906557B (en) | 2021-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110906557B (en) | Zero-cold-water gas wall-mounted furnace and control method of anti-freezing mode thereof | |
| CN110220313B (en) | Gas water heater control method and gas water heater | |
| KR101990855B1 (en) | Method for automatically switching hot water and heating of a boiler with low-temperature hot water storage tank | |
| CN111503899A (en) | Rapid heating temperature control method of gas heat exchange equipment | |
| KR20130055086A (en) | Method for preheating hot-water of a boiler using the electric heater for preventing ferrzing | |
| KR20090103448A (en) | Flow control method for circular pump in boiler | |
| CN112197439B (en) | Gas water heater control method, device and system and gas water heater | |
| KR20140085676A (en) | Method for preventing freezing of heating pipe and hot-water pipe of boiler | |
| CN209944770U (en) | Anti-freezing gas water heater | |
| CN111174444A (en) | Control method for intelligent preheating of zero-cold-water heater | |
| CN110873466B (en) | Over-temperature protection control method for heating system of heating furnace and heating furnace | |
| CN212481654U (en) | Gas water heater with current limiting device | |
| KR101017492B1 (en) | OPerating method for preventing freezing in boiler for saving gas and protecting equipment | |
| JP6330451B2 (en) | Bath hot water system | |
| CN110345645B (en) | Wall-mounted furnace water outlet control method and device and wall-mounted furnace equipment | |
| CN110762851B (en) | Quick ignition control method for secondary water consumption of gas water heater | |
| CN110822720B (en) | Wall-mounted boiler safety fault control method | |
| CN113720021A (en) | Water heater anti-freezing method and water heater | |
| CN112577201B (en) | Domestic water constant-temperature supply structure of gas heating stove and anti-freezing method thereof | |
| CN212511772U (en) | Zero-cold-water forced-ventilated type gas water heater | |
| CN110701797A (en) | Wall-mounted furnace control method for preventing icing and wall-mounted furnace | |
| KR20120061253A (en) | Flow control method for preventing brain for circular pump in boiler | |
| CN111426051A (en) | Gas water heater with current limiting device and control method thereof | |
| CN111174275B (en) | Anti-freezing control method and anti-freezing system of wall-mounted boiler | |
| KR101635897B1 (en) | Water leakage blocking of the boiler and water heater with a flow control valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |