CN111365855A - Gas water heater capable of realizing multistage current limiting and temperature control and control method thereof - Google Patents
Gas water heater capable of realizing multistage current limiting and temperature control and control method thereof Download PDFInfo
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- CN111365855A CN111365855A CN202010182583.XA CN202010182583A CN111365855A CN 111365855 A CN111365855 A CN 111365855A CN 202010182583 A CN202010182583 A CN 202010182583A CN 111365855 A CN111365855 A CN 111365855A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 730
- 238000000034 method Methods 0.000 title claims description 16
- 239000003381 stabilizer Substances 0.000 claims abstract description 76
- 230000001276 controlling effect Effects 0.000 claims abstract description 40
- 238000001514 detection method Methods 0.000 claims abstract description 40
- 230000001105 regulatory effect Effects 0.000 claims abstract description 27
- 239000007789 gas Substances 0.000 claims description 84
- 238000003287 bathing Methods 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000002737 fuel gas Substances 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 10
- 239000002699 waste material Substances 0.000 abstract description 9
- 239000008399 tap water Substances 0.000 description 11
- 235000020679 tap water Nutrition 0.000 description 11
- 230000000630 rising effect Effects 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
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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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- 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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
Abstract
The invention discloses a multi-stage flow-limiting and temperature-controlling gas water heater which comprises a burner, a heat exchanger, a water inlet pipe, a water outlet temperature detection device, a water flow detection device, a gas proportional valve, a first water regulating device and a controller, wherein the first water regulating device comprises a first valve body, a first flow stabilizer and a control valve, the first valve body is provided with a first main water path and a first bypass water path, two ends of the first main water path are respectively communicated with external water supply and a water inlet end of the water flow detection device, the first main water path is provided with the first flow stabilizer, a water inlet end and a water outlet end of the first bypass water path are respectively communicated with a water inlet end and a water outlet end of the first flow stabilizer, and the control valve is arranged on the first valve body and used for controlling the on-off of the first bypass water path. The water heater can achieve the effect of rapid temperature rise, reduce the waiting time and the cold water waste amount, and simultaneously can reduce the influence of water supply pressure on the temperature rise stage.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a multistage current-limiting control technology of a water heater.
Background
At present, when a user opens a hot water faucet for the first time, tap water flows into a common constant-temperature gas water heater, a water flow sensing device of a main water path of the gas water heater monitors that water flows through the common constant-temperature gas water heater, a gas valve is opened to ventilate and ignite the tap water, the tap water is heated, and after ignition, the opening of the gas valve is controlled according to the difference between preset temperature and outlet water temperature, so that the outlet water temperature gradually reaches the preset temperature of the gas water heater, and constant-temperature hot water output is realized. However, the interval from the monitoring of the water flow signal to the ignition of the water heater is more than 2 seconds, about 20 seconds are still required until the water outlet temperature reaches the preset temperature after the ignition, and a certain time is also required for the hot water to flow to the hot water faucet through the hot water pipe. Therefore, after a hot water faucet is opened, a section of cold water flows out firstly and then hot water flows out, the time from the hot water faucet being opened to the time when comfortable hot water flows out usually exceeds 30 seconds, and a user needs to wait for the cold water to be discharged completely to use the hot water, so that the waste of tap water is caused.
The heating time of the constant-temperature gas water heater is influenced by factors such as set temperature, water inlet temperature and water supply flow, and generally, the higher the set temperature is, the lower the tap water temperature is, the larger the water supply flow is, the longer the time for the outlet water temperature to reach the preset temperature is. Especially, the heating time of the gas water heater is longer in winter, the time for a user to wait for hot water is longer, the user is easy to catch cold, and more tap water is wasted.
Disclosure of Invention
The invention aims to solve one of the problems in the prior related art at least to a certain extent, and therefore the invention provides the gas water heater capable of realizing multi-stage flow limiting and temperature control, which realizes multi-stage water flow limiting, can heat the temperature rise speed and accurately control the hot water temperature by automatically controlling the water flow gear of the first water regulating device and the opening degree of the gas proportional valve, reduces the waiting time and the cold water discharge amount of a user, and improves the water use experience.
The invention also provides a control method applying the gas water heater, which not only realizes rapid temperature rise and reduces waiting time and cold water discharge, but also can accurately control the temperature of hot water and prevent users from being scalded due to overhigh temperature of outlet water.
According to the gas water heater capable of realizing multistage current-limiting temperature control, the following technical scheme is adopted to realize that:
a gas water heater capable of realizing multi-stage current limiting and temperature control comprises a burner, a heat exchanger, a water inlet pipe, a water outlet temperature detection device, a water flow detection device and a gas proportional valve, wherein the water inlet end and the water outlet end of the heat exchanger are respectively communicated with the water inlet pipe and the water outlet pipe, the water outlet temperature detection device is arranged on the water outlet pipe, the water flow detection device is arranged on the water inlet pipe, the gas proportional valve is communicated with the air inlet end of the burner, the gas water heater further comprises a first water regulating device and a controller, the first water regulating device comprises a first valve body, a first current stabilizer and a control valve, the first valve body is provided with a first main water path and a first bypass water path, the two ends of the first main water path are respectively communicated with external water supply and the water inlet end of the water flow detection device, and a first current stabilizer for regulating and stabilizing water flow is arranged on the, the water inlet end and the water outlet end of the first bypass water path are respectively communicated with the water inlet end and the water outlet end of the first flow stabilizer, the control valve is arranged on the first valve body and used for controlling the on-off of the first bypass water path, and the controller is respectively connected with the water outlet temperature detection device, the water flow detection device, the gas proportional valve and the control valve in an electric connection mode.
In some embodiments, the flow limiting value of the first flow stabilizer is greater than the minimum startup flow of the water heater, and the flow limiting value of the first flow stabilizer is less than the maximum water flow of the water heater.
In some embodiments, the water dispenser further comprises a second water dispenser, the second water dispenser comprises a second valve body, a second flow stabilizer and the control valve, the second valve body is provided with a second main water path and a second bypass water path, two ends of the second main water path are respectively communicated with the water outlet end of the first main water path and the water inlet end of the water flow detection device, the second main water path is provided with a second flow stabilizer for adjusting and stabilizing water flow, the water inlet end and the water outlet end of the second bypass water path are respectively communicated with the water inlet end and the water outlet end of the second flow stabilizer, and the control valve is arranged on the second valve body and electrically connected with the controller for controlling the on-off state of the second bypass water path.
In some embodiments, the flow limiting value of the second flow stabilizer is greater than the flow limiting value of the first flow stabilizer, and the flow limiting value of the second flow stabilizer is less than the maximum water flow of the water heater.
In some embodiments, the water heater further comprises a water inlet joint and a main flow stabilizer, the water inlet joint is communicated with the first main water path water inlet end, the main flow stabilizer is arranged in the water inlet joint or the first main water path water inlet end, and the flow limiting value of the main flow stabilizer is the maximum water flow of the water heater.
In some embodiments, the sum of the current limit value of the third current regulator and the current limit value of the second current regulator is less than the maximum startup flow of the water heater.
In some embodiments, the water inlet device further comprises a water inlet temperature detection device, and the water inlet temperature detection device is arranged on the water inlet pipe and electrically connected with the controller.
According to the control method of the gas water heater, the control method is realized through the following technical scheme:
a control method for applying the gas water heater comprises the following steps:
s1: controlling all control valves to be closed, and entering a bathing mode when the water heater is started and ignited;
s2: controlling the opening of the fuel gas proportional valve and the working state of each control valve at least according to the magnitude relation between the real-time outlet water temperature Ti and the preset temperature Ts;
s3: acquiring and judging whether the real-time inflow flow is less than or equal to the shutdown flow of the water heater, if so, entering a step S4, otherwise, returning to the step S2;
s4: and closing the gas proportional valve and all the control valves, and exiting the bathing mode.
In some embodiments, the controlling the opening degree of the gas proportional valve and the working states of all the control valves according to at least the magnitude relation between the real-time outlet water temperature Ti and the preset temperature Ts includes the steps of:
s201: automatically adjusting the opening degree of a fuel gas proportional valve according to the difference value of the real-time outlet water temperature Ti and the preset temperature Ts;
s202: acquiring and judging whether the real-time outlet water temperature Ti is greater than or equal to a preset temperature Ts, if so, entering step S203, otherwise, judging the relation between the real-time inlet water flow and the shutdown flow of the water heater, and returning to step S201 or entering step S4 according to the judgment result;
s203: calculating the maximum hot water flow of the water heater according to the rated hot water producing capacity of the water heater, the preset temperature Ts and the water temperature obtained when the water heater is started and ignited;
s204: controlling the working state of each control valve according to the maximum hot water flow;
s205: and (4) readjusting the opening of the gas proportional valve, and controlling the water outlet temperature Ti of the water heater according to the preset temperature Ts. In some embodiments, in step S203, the maximum hot water flow of the water heater is calculated by the following formula: vmax 25VProduce waterThe water heater is characterized in that the water heater is/△ T, △ T-Ti 0-Ts-Ta 0, wherein Vmax is the maximum hot water flow of the water heater, and VProduce water△ T is a target heating temperature difference for the rated hot water production capacity of the water heater, Ti0 is the initial outlet water temperature when the water heater is started and ignited, and Ta0 is the initial inlet water temperature when the water heater is started and ignited.
In some embodiments, the controlling the opening degree of the gas proportional valve and the working states of all the control valves according to at least the magnitude relation between the real-time outlet water temperature Ti and the preset temperature Ts further includes the steps of:
s206: obtaining and judging the size relationship between the real-time outlet water temperature Ti and the preset temperature Ts again, if Ti is less than Ts, entering step S207, if Ti is equal to Ts, maintaining the current bathing working state and returning to step S205, and if Ti is more than Ts, entering step S210;
s207: acquiring and judging whether the opening degree of the gas proportional valve is at the maximum opening degree, if so, entering step S208, otherwise, returning to step S205;
s208: judging whether the water heater is in a minimum water flow gear, if so, maintaining the current bathing working state and returning to the step S205, and if not, entering the step S209;
s209: controlling the working state of each control valve, reducing the water flow gear of the water heater and returning to the step S205;
s210: acquiring and judging whether the opening degree of the gas proportional valve is at the minimum opening degree, if so, entering step S211, otherwise, returning to step S205;
s211: judging whether the water heater is in a maximum water flow gear, if so, maintaining the current bathing working state and returning to the step S205, and if not, entering the step S212;
s212: and controlling the working state of each control valve, increasing the water flow gear of the water heater and returning to the step S205.
Compared with the prior art, the invention at least comprises the following beneficial effects:
1. according to the water heater, the first water adjusting device is arranged, so that the water heater can limit water flow in multiple stages, and the water flow is adjusted and stabilized through the first current stabilizer positioned in the first main water channel, so that the water heater is at the minimum water flow gear for heating in a heating stage, the rapid heating effect is favorably achieved, and the problems of long hot water waiting time and large cold water waste of the conventional common constant-temperature gas water heater are solved;
2. the first main water channel is provided with the first flow stabilizer, so that the water flow is regulated and stabilized, and the influence of the water supply pressure on the water heater in the temperature rise stage is reduced;
3. according to the water heater, the controller can automatically control the water flow gear of the water heater and the opening degree of the gas proportional valve according to the relation between the outlet water temperature and the preset temperature, so that the hot water temperature is accurately controlled, a user is prevented from being scalded due to overhigh outlet water temperature, and the water using experience of the user is improved.
Drawings
Fig. 1 is a schematic structural diagram of a gas water heater in a minimum water flow gear in embodiment 1 of the invention;
FIG. 2 is a schematic structural diagram of a first water diversion apparatus in embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of a second water diversion apparatus in embodiment 1 of the present invention;
FIG. 4 is a schematic structural diagram of a gas water heater in a two-stage water flow gear in embodiment 1 of the invention;
fig. 5 is a schematic structural diagram of a gas water heater in a maximum water flow gear in embodiment 1 of the invention;
FIG. 6 is a schematic structural view of a gas water heater in embodiment 2 of the present invention;
fig. 7 is a flowchart of a control method of a gas water heater in embodiment 3 of the invention;
FIG. 8 is a flow chart of the water heater rapidly increasing temperature in the bathing mode according to the embodiment 3 of the present invention;
FIG. 9 is a graph showing the relationship between the real-time outlet water temperature and the outlet water time of the water heater according to embodiment 3 of the present invention;
FIG. 10 is a graph showing the relationship between the maximum hot water flow rate and the target heating temperature difference of the water heater in example 3 of the present invention;
FIG. 11 is a flow chart of the precise temperature control of the water heater in the bathing mode in the embodiment 3 of the present invention.
Detailed Description
The present invention is illustrated by the following examples, but the present invention is not limited to these examples. Modifications to the embodiments of the invention or equivalent substitutions of parts of technical features without departing from the spirit of the invention are intended to be covered by the scope of the claims of the invention.
Example 1
As shown in fig. 1-2, the gas water heater capable of multi-stage current-limiting and temperature-controlling of this embodiment includes a burner 1, a heat exchanger 2, a water inlet pipe 31, a water outlet pipe 32, a water outlet temperature detection device 41, a water flow detection device 5, a gas proportional valve 6, a first water regulating device 7 and a controller 8, wherein a water inlet end and a water outlet end of the heat exchanger 2 are respectively communicated with the water inlet pipe 31 and the water outlet pipe 32, the water inlet end of the water inlet pipe 31 is communicated with a water inlet joint 30, and the water outlet end of the water outlet pipe 32 is communicated with an external hot water. The outlet temperature detection device 41 is disposed on the outlet pipe 32 and electrically connected to the controller 8, and is configured to detect the outlet temperature of the outlet pipe 32 in real time. The water flow detection device 5 is arranged on the water inlet end of the water inlet pipe 31 and electrically connected with the controller 8, and is used for detecting the water inlet flow of the water inlet pipe 31 in real time. The gas proportional valve 6 is communicated with the gas inlet end of the combustor 1 and is electrically connected with the controller 8, and the gas proportional valve is used for controlling the combustion firepower of the water heater by controlling the opening degree of the gas proportional valve 6.
In addition, the first water adjusting device 7 includes a first valve body 71, a first flow stabilizer 72 and a control valve 73, the first valve body 71 is provided with a first main water path 711 and a first bypass water path 712, the water inlet end of the first main water path 711 is communicated with external water supply through the water inlet connector 30, the water outlet end of the first main water path 711 is communicated with the water inlet end of the water flow detection device 5, and the first flow stabilizer 72 for adjusting and stabilizing water flow is arranged on the first main water path 711, so that the water heater is slightly affected by water supply pressure in the temperature rising stage, and rapid temperature rising and rapid constant temperature are favorably realized. The water inlet end of the first bypass water path 712 is communicated with the water inlet end of the first flow stabilizer 72, the water outlet end of the first bypass water path is communicated with the water outlet end of the first flow stabilizer 72, and the control valve 73 is disposed on the first valve body 71 and electrically connected to the controller 8 for controlling the on/off of the first bypass water path 712. In this embodiment, the first flow stabilizer 72 is a flow stabilizer spool and the control valve 73 is preferably a solenoid valve. When the control valve 73 closes the first bypass water passage 712, the first main water passage 711 is in a clear state, and the water heater is in a first-level water flow gear, namely a minimum water flow gear; when the control valve 73 fully opens the first bypass water path 712, the water heater is in the secondary water flow position.
It can be seen that, in the gas water heater of the embodiment, the first water regulating device 7 is arranged between the water inlet connector 30 and the water inlet end of the water flow detection device 5, so that multi-stage water flow limitation is realized, and meanwhile, the first current stabilizer 72 located in the first main water channel 711 can regulate and stabilize the water flow, so that the water heater is at the minimum water flow gear for temperature rise in the temperature rise stage, thereby being beneficial to achieving the effect of rapid temperature rise, solving the problems of long hot water waiting time and large cold water waste of the existing common constant-temperature gas water heater, and meanwhile, the first current stabilizer 72 can reduce the influence of water supply pressure on the water heater in the temperature rise stage; in addition, when leaving water temperature and being close to preset temperature, controller 8 can realize accurate control hot water temperature according to leaving water temperature and the relation of presetting the temperature, the rivers gear of automatic control water heater and the aperture of gas proportional valve 6, prevents that the temperature of leaving water is too high and scald the user, promotes user's water experience.
Preferably, the flow limiting value of the first flow stabilizer 72 is greater than the minimum startup flow of the water heater, and the flow limiting value of the first flow stabilizer 72 is less than the maximum water flow of the water heater, so that the minimum water flow gear of the water heater can meet the minimum startup flow required by startup ignition of the water heater. More preferably, the current limiting value of the first current stabilizer 72 of the present embodiment is 4-8L/min, which is higher than the minimum startup flow of the water heater by 2.5L/min.
As shown in fig. 1 and 3, the water flow regulating device further includes a second water regulating device 9, the second water regulating device 9 includes a second valve body 91, a second flow stabilizer 92 and a control valve 73, the second valve body 91 is provided with a second main water passage 911 and a second bypass water passage 912, two ends of the second main water passage 911 are respectively communicated with a water outlet end of the first main water passage 711 and a water inlet end of the water flow detecting device 5, and the second main water passage 911 is provided with the second flow stabilizer 92 for regulating and stabilizing water flow. The water inlet end and the water outlet end of the second bypass waterway 912 are respectively communicated with the water inlet end and the water outlet end of the second flow stabilizer 92, and the control valve 73 is arranged on the second valve body 91 and electrically connected with the controller 8 for controlling the on-off of the second bypass waterway 912. Therefore, the second water adjusting device 9 is additionally arranged between the first water adjusting device 7 and the water flow detection device 5, and the control valve 73 positioned on the first water adjusting device 7 and the control valve 73 positioned on the second water adjusting device 9 are subjected to combined control, so that the water flow gear of the water heater is finer, and the water flow of the water heater can be accurately controlled.
Preferably, the flow limit value of the second flow stabilizer 92 is greater than the flow limit value of the first flow stabilizer 72, and the flow limit value of the second flow stabilizer 92 is less than the maximum water flow rate of the water heater. More preferably, the second flow stabilizer 92 has a restriction value of 12L/min. Therefore, the first flow stabilizer 72 located in the first main water channel 711 can be used to control a first-stage water flow gear of the water heater, that is, a minimum water flow gear, and the second flow stabilizer 92 located in the second main water channel 911 is used to control a second-stage water flow gear of the water heater, so that the controller 8 can control the operating states of the control valve 73 located in the first water regulating device 7 and the control valve 73 located in the second water regulating device 9, that is, the two control valves 73 are switched, and three-stage stepped water flow regulation is realized.
Further, still include into water temperature-detecting device 42, into water temperature-detecting device 42 sets up on inlet tube 31 and with 8 electric connection of controller. From this, controller 8 can acquire the temperature of intaking of inlet tube 31 according to temperature-detecting device 42 of intaking, and the work of controller 8 according to the temperature control water heater of being convenient for.
The water flow gear of the water heater of the embodiment is described below with reference to fig. 1 and fig. 4-5:
as shown in fig. 1, the control valve 73 at the first water diversion device 7 and the control valve 73 at the second water diversion device 9 are closed. When a user opens the hot water faucet, external water (i.e., tap water) sequentially flows into the heat exchanger 2 through the water inlet connector 30, the first main water passage 711 with the first flow stabilizer 72, the second main water passage 911 with the second flow stabilizer 92, and the water flow detection device 5 to be heated, at this time, the water inlet flow rate of the water supplied to the water flow detection device 5 or the heat exchanger 2 is controlled by the first main water passage 711 with the first flow stabilizer 72, and at this time, the water heater is at a first-stage water flow position (i.e., a minimum water flow position). Because of the limitation of the first flow stabilizer 72, the maximum water flow rate of the minimum water flow gear is 4-8L/min of the current limiting value of the first flow stabilizer 72 and is higher than the minimum starting flow rate of the water heater. From this, when the water heater is in minimum rivers gear, can satisfy water heater start ignition demand to in the water heater intensification stage, heat up through controlling minimum rivers gear, do benefit to and accelerate rate of heating up, reach quick homothermal purpose, reduce user latency and cold water discharge, and under first current regulator 72 restriction effect, reduced the water heater and received water supply pressure influence in the intensification stage, further promote water heater rapid heating effect.
As shown in fig. 4, the control valve 73 at the first water control device 7 is opened to put the first bypass water passage 712 in a conducting state, and at the same time, the control valve 73 at the second water control device 9 is closed. When the user opens the hot water faucet and the external water (i.e. tap water) flows through the first water adjustment device 7, the first bypass water path 712 is in the conduction state, and the water flow is not limited by the first flow stabilizer 72; when the external water supply flows through the second main water channel 911 of the second water transfer device 9, the water heater is in a second-stage water flow gear position because of the limitation of the second flow stabilizer 92 positioned in the second main water channel 911, and the maximum water flow rate of the second-stage water flow gear position is the flow limiting value of the second flow stabilizer 92. From this, when the water heater is in second grade rivers gear, compare in minimum rivers gear, the user water demand of satisfying that can be better, simultaneously under second current regulator 92 restriction effect, make the water heater receive water supply pressure when great discharge to influence littleer.
As shown in fig. 5, the control valve 73 of the first water control device 7 and the control valve 73 of the second water control device 9 are opened at the same time, and both the first bypass water passage 712 and the second bypass water passage 912 are in a conducting state. After a user opens the hot water faucet, external water supply (namely tap water) sequentially passes through the water inlet joint 30, the first water adjusting device 7, the second water adjusting device 9 and the water flow detection device 5 and flows into the heat exchanger 2 to be heated, and as the first bypass water path 712 and the second bypass water path 912 are both communicated, the water inlet flow rate of the water supply detection device 5 or the heat exchanger 2 is not influenced by the first flow stabilizer 72 and the second flow stabilizer 92, and at the moment, the water heater is in a three-level water flow gear, namely, a maximum water flow gear.
Example 2
As shown in fig. 6, the present embodiment is different from embodiment 1 in that a main current stabilizer 10 is further included. The main flow stabilizer 10 is disposed in the water inlet connector 30 or the water inlet end of the first main water channel 711, and the flow limiting value of the main flow stabilizer 10 is the maximum flow rate of the water heater, and other components are the same as those in embodiment 1. In this embodiment, the main flow stabilizer 10 is disposed in the water inlet joint 30 for controlling the maximum flow rate of water flowing through the water heater.
Therefore, the main flow stabilizer 10 for controlling the maximum water flow of the water heater is additionally arranged in the water inlet connector 30, so that the maximum water flow of the water heater is more stable, the accurate control of the water flow of the water heater is facilitated, and the influence of the overlarge water supply pressure of tap water on the constant-temperature hot water outlet effect of the water heater is avoided.
Example 3
This embodiment is different from embodiment 1 in that the second water control device 9 is omitted, and the other parts are the same as embodiment 1. When the first bypass water path 712 is closed, the flow rate of the water is limited by the first flow stabilizer 72 of the first water regulating device 7, and the water heater is at a first-level water flow gear, namely a minimum water flow gear; when the first bypass water path 712 is opened, the water flow is not limited by the first flow stabilizer 72 of the first water regulating device 7, and the water heater is in the second-level water flow gear, i.e., the maximum water flow gear.
It can be seen that the first water adjusting device 7 or the second water adjusting device 9 is omitted, so that the multi-stage control of water flow is realized, and meanwhile, the manufacturing cost is favorably reduced.
Example 4
Referring to fig. 7, a control method of the present embodiment to which the gas water heater as described in embodiment 1 or 2 is applied, the control method comprising the steps of:
s1: all control valves 73 are controlled to be closed, and the bathing mode is started when the water heater is started and ignited;
specifically, the water heater is in the power-on standby mode, and the controller 8 controls all the control valves 73 to be closed so that the water heater is in the minimum water flow gear. When a user opens the hot water faucet at the water using end, tap water sequentially flows through the first water regulating device 7 or the first water regulating device 7 and the second water regulating device 9 through the water inlet connector 30 and then flows into the water flow detection device 5, and due to the limitation of the first flow stabilizer 72 of the first water regulating device 7, the inflow rate is lower than the flow limiting value of the first flow stabilizer 72. The water flow detection device 5 continuously detects the real-time water inlet flow of the water inlet pipe 31 and sends the real-time water inlet flow to the controller 8, the controller 8 judges whether the real-time water inlet flow is larger than or equal to the minimum starting flow of the water heater, if the real-time water inlet flow is larger than or equal to the minimum starting flow, the controller 8 controls the gas proportional valve 6 to be opened and the burner 1 to ignite and burn, the water heater enters a bathing mode from a power-on standby mode, and the water flow is heated and heated.
S2: controlling the opening degree of the gas proportional valve 6 and the working state of each control valve 73 at least according to the magnitude relation between the real-time outlet water temperature Ti and the preset temperature Ts;
specifically, the outlet water temperature detection device 41 continuously detects the real-time outlet water temperature Ti of the water pipe 32, and the controller 8 determines the magnitude relation between the real-time outlet water temperature Ti and the preset temperature Ts according to the outlet water temperature Ti detected by the outlet water temperature detection device 41. In the temperature rising stage of the water heater, the controller 8 automatically adjusts the opening degree of the gas proportional valve 6 to change the combustion firepower according to the characteristic that the real-time outlet water temperature Ti is lower than the preset temperature Ts, so that the real-time outlet water temperature Ti is heated to be close to the preset temperature Ts. By limiting the water flow in the temperature rise stage, the purposes of quickly raising the temperature and discharging hot water and reducing water waste can be achieved.
In addition, when the real-time outlet water temperature Ti is greater than or equal to the preset temperature Ts, the constant-temperature outlet hot water stage is started, the controller 8 controls the working state of each control valve 73 according to the current bathing state, and then controls the gas proportional valve 6 to automatically adjust the opening degree, so that the combustion fire power is matched with the automatically adjusted water flow gear, the water flow is increased, meanwhile, the hot water temperature is accurately controlled, and the hot water is quickly discharged at constant temperature.
S3: acquiring and judging whether the real-time inflow flow is less than or equal to the shutdown flow of the water heater, if so, entering a step S4, otherwise, returning to the step S2;
specifically, the water flow detection device 5 continuously detects the real-time water inflow rate of the water inlet pipe 31 and sends the real-time water inflow rate to the controller 8, the controller 8 judges the magnitude relation between the real-time water inflow rate and the shutdown flow rate of the water heater, and if the real-time water inflow rate is less than or equal to the shutdown flow rate of the water heater, the step S4 is performed; and if the real-time inflow water flow is larger than the shutdown flow of the water heater, returning to the step S2, and continuing to perform multi-stage flow-limiting temperature control.
S4: and closing the gas proportional valve 6 and the all control valves 73, and exiting the bathing mode.
Specifically, the controller 8 controls the gas proportional valve 6 to close, the burner 1 is shut down, and simultaneously controls all the control valves 73 to close, so that the water flow gear of the water heater is recovered to the minimum water flow gear, the bathing mode is exited, and the power-on standby mode is returned.
Therefore, according to the control method of the gas water heater, the water heater is controlled to be in the minimum water flow gear in the temperature rising stage, the effect of rapidly rising the temperature and discharging hot water by reducing the water flow is achieved, the waiting time of a user is shortened, and the waste of water resources is reduced. In addition, in the constant temperature hot water outlet stage, the accurate control of the hot water temperature is realized through the automatic adjustment of water flow gears and the opening degree of the gas proportional valve 6, the hot water is quickly discharged at constant temperature, and the water consumption experience of a user is improved.
As shown in fig. 8, further, in step S2, the controlling the opening degree of the gas proportional valve 6 and the operating state of all the control valves 73 according to the magnitude relationship between at least the real-time outlet water temperature Ti and the preset temperature Ts includes the steps of:
s201: automatically adjusting the opening degree of the fuel gas proportional valve 6 according to the difference value of the real-time outlet water temperature Ti and the preset temperature Ts;
specifically, in the temperature rise stage of the water heater, the difference value between the real-time outlet water temperature Ti and the preset temperature Ts is large, the controller 8 controls the gas proportional valve 6 to automatically adjust the opening degree, and the combustion firepower is changed, so that the real-time outlet water temperature Ti reaches the preset temperature Ts. Because the water heater is in the minimum water flow gear, the purposes of quickly heating up hot water and reducing water waste are achieved by limiting the water flow in the heating-up stage. As shown in fig. 10, compared with the conventional constant-temperature water heater, in the startup heating stage of the water heater of the patent, the water flow is small, the heating speed of hot water is higher, the constant-temperature hot water discharging time and the user waiting time can be shortened, and the waste of water resources can be reduced.
S202: acquiring and judging whether the real-time outlet water temperature Ti is greater than or equal to a preset temperature Ts, if so, entering step S203, otherwise, judging the relation between the real-time inlet water flow and the shutdown flow of the water heater, and returning to step S201 or entering step S4 according to the judgment result;
specifically, the controller 8 obtains the real-time outlet water temperature Ti through the outlet water temperature detection device 41, and determines whether the real-time outlet water temperature Ti is greater than or equal to the preset temperature Ts. And if the real-time outlet water temperature Ti is not less than the preset temperature Ts, the step S203 is executed to perform multi-stage current-limiting control, and the hot water temperature is accurately controlled. If the real-time outlet water temperature Ti is less than the preset temperature Ts, determining that the water consumption of a user is interrupted by judging whether the real-time inlet water flow is less than or equal to the shutdown flow of the water heater, and when the real-time inlet water flow is less than or equal to the shutdown flow of the water heater, entering a step S4, and closing the gas proportional valve 6 and all control valves 73; and returning to the step S201 when the real-time inflow water flow is larger than the shutdown flow of the water heater, and continuing to perform temperature rise control. Therefore, whether the control of the heating stage is finished or not is determined by judging whether the real-time outlet water temperature Ti is greater than or equal to the preset temperature Ts, and whether the water supply of a user is interrupted or not is determined by judging the relation between the real-time inlet water flow and the shutdown flow of the water heater in the heating stage.
S203: calculating the maximum hot water flow of the water heater according to the rated hot water producing capacity of the water heater, the preset temperature Ts and the water temperature obtained when the water heater is started and ignited;
specifically, the water temperature obtained when the water heater is turned on and ignited is specifically the initial inlet water temperature Ta0 or the initial outlet water temperature Ti0 obtained when the controller 8 is turned on and ignited. The controller 8 calculates the maximum hot water flow of the water heater according to the rated hot water producing capacity of the water heater, the preset temperature Ts and the initial inlet water temperature, or according to the rated hot water producing capacity of the water heater, the preset temperature Ts and the initial outlet water temperature. Therefore, the hot water temperature can be accurately controlled by combining the rated hot water production capacity of the water heater, the preset temperature Ts and the initial inlet water temperature Ta 0/initial outlet water temperature Ti 0.
S204: the operating state of each control valve 73 is controlled according to the maximum hot water flow; s205: and (4) readjusting the opening of the gas proportional valve 6, and controlling the outlet water temperature Ti of the water heater according to the preset temperature Ts. Specifically, after the operating state of each control valve 73 is adjusted, the water flow gear of the water heater changes correspondingly, the controller 8 readjusts the opening degree of the gas proportional valve 6 according to the water flow gear of the water heater, so that the combustion fire is guaranteed to be compatible with the water flow gear by switching the water flow gear and adjusting the opening degree of the gas proportional valve 6, and the hot water temperature is controlled accurately and the temperature is kept quickly.
Therefore, the water heater is controlled to be in the minimum water flow gear in the temperature rising stage, the effect of quickly rising the temperature and discharging hot water by reducing the water flow is achieved, the waiting time of a user is shortened, and the waste of water resources is reduced. And when the real-time outlet water temperature Ti is greater than or equal to the preset temperature Ts, the maximum hot water flow of the water heater is calculated, the working state of each control valve 73 is controlled according to the calculated maximum hot water flow, and then the opening of the gas proportional valve 6 is adjusted again, so that the water flow gear of the water heater is accurately controlled, the opening of the gas proportional valve 6 is adjusted, and the aim of accurately controlling the temperature is fulfilled.
Preferably, in step S203, the maximum hot water flow of the water heater is calculated by the following formula: vmax 25VProduce waterThe power supply comprises a power supply, a power supply voltageProduce water△ T is a target heating temperature difference for the rated hot water production capacity of the water heater, Ti0 is the initial outlet water temperature when the water heater is started and ignited, and Ta0 is the initial inlet water temperature when the water heater is started and ignited.
As shown in FIG. 9, the controller 8 calculates the target heating temperature difference △ T according to the preset temperature Ts and the initial inlet water temperature Ta0 or according to the preset temperature Ts and the initial outlet water temperature Ti0, and then automatically matches the rated hot water producing capacity V of the corresponding water heater according to the calculated target heating temperature difference △ TProduce water(ii) a Finally according to rated hot water production capacity VWater production,And calculating the target heating temperature difference △ T to obtain the maximum hot water flow Vmax of the water heater.
Preferably, in step S204, the controlling of the operating state of each control valve 73 according to the maximum hot water flow includes: according to the calculated maximum hot water flow, the controller 8 compares the maximum hot water flow with at least one reference value, automatically matches the corresponding water flow step based on the comparison result, and controls the operating state of each control valve 73 according to the matched water flow step. From this, realized the discharge of automatic adjustment water heater, do benefit to the effect that reaches intelligent accuse temperature.
More preferably, the at least one reference value includes a restriction value of the first flow stabilizer 72 and a restriction value of the second flow stabilizer 92, if the maximum hot water flow rate is greater than the restriction value of the second flow stabilizer 92, the maximum water flow gear is automatically matched, and all the control valves 73 are controlled to be opened; if the flow limiting value of the second flow stabilizer 92 is larger than or equal to the maximum hot water flow rate and larger than the flow limiting value of the first flow stabilizer 72, automatically matching to a second-stage water flow gear, and controlling the control valve 73 of the first water regulating device 7 to be opened and the control valve 73 of the second water regulating device 9 to be closed; if the flow limiting value of the first flow stabilizer 72 is larger than or equal to the maximum hot water flow, the minimum water flow gear is automatically matched, and all the control valves 73 are controlled to be closed.
As shown in fig. 11, the controlling the opening of the gas proportional valve 6 and the working states of all the control valves 73 according to the magnitude relationship between the real-time outlet water temperature Ti and the preset temperature Ts further includes:
s206: obtaining and judging the size relationship between the real-time outlet water temperature Ti and the preset temperature Ts again, if Ti is less than Ts, entering step S207, if Ti is equal to Ts, maintaining the current bathing working state and returning to step S205, and if Ti is more than Ts, entering step S210;
s207: acquiring and judging whether the opening degree of the gas proportional valve 6 is at the maximum opening degree, if so, entering step S208, otherwise, returning to step S205;
s208: judging whether the water heater is in a minimum water flow gear, if so, maintaining the current bathing working state and returning to the step S205, and if not, entering the step S209;
s209: controlling the working state of each control valve 73, reducing the water flow gear of the water heater and returning to the step S205;
s210: acquiring and judging whether the opening degree of the gas proportional valve 6 is at the minimum opening degree, if so, entering step S211, otherwise, returning to step S205;
s211: judging whether the water heater is in a maximum water flow gear, if so, maintaining the current bathing working state and returning to the step S205, and if not, entering the step S212;
s212: and controlling the working state of each control valve 73, increasing the water flow gear of the water heater and returning to the step S205.
Therefore, when the water heater monitors that the real-time outlet water temperature Ti is less than the preset temperature Ts in the stage of controlling the constant-temperature outlet water, the controller 8 controls the gas proportional valve 6 to increase the opening degree by controlling whether the gas proportional valve 6 is in the maximum opening degree or not, and if the gas proportional valve 6 is not in the maximum opening degree, the combustion firepower is improved to improve the outlet water temperature; if the gas proportional valve 6 is in the maximum opening degree, whether the water heater is in the minimum water flow gear is judged. When the water heater is in the minimum water flow gear, the current bathing working state is maintained; when the water flow is not at the minimum water flow gear, the controller 8 correspondingly controls the switch of each control valve 73 to reduce the first-level water flow gear, so that the temperature rise of hot water is increased by reducing the water flow, the temperature of the hot water is accurately controlled, and the quick constant temperature effect is ensured.
When the real-time outlet water temperature Ti is monitored to be higher than the preset temperature Ts, firstly, whether the gas proportional valve 6 reaches the minimum firepower opening degree is judged, and if the minimum firepower opening degree is not reached, the controller 8 reduces the opening degree of the gas proportional valve 6 to reduce the outlet water temperature; and if the minimum firepower opening degree is reached, judging whether the water heater is in a maximum water flow gear or not. When the water heater is in the maximum water flow gear, the current bathing working state is maintained; if the water heater is not in the maximum water flow gear, the controller 8 correspondingly controls the switch of each control valve 73, and one-level water flow gear is increased to realize the reduction of the temperature rise of hot water through the increase of water flow, so that the hot water temperature is accurately controlled, and the user is prevented from being scalded due to overhigh water outlet temperature.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a but gas heater of multistage current-limiting accuse temperature, includes combustor (1), heat exchanger (2), inlet tube (31), outlet pipe (32), goes out water temperature detection device (41), rivers detection device (5) and gas proportional valve (6), the end of intaking and the play water end of heat exchanger (2) respectively with inlet tube (31), outlet pipe (32) intercommunication, play water temperature detection device (41) set up in outlet pipe (32), rivers detection device (5) set up in inlet tube (31), gas proportional valve (6) with combustor (1) inlet end intercommunication, its characterized in that still includes first water regulating device (7) and controller (8), first water regulating device (7) include first valve body (71), first current stabilizer (72) and control valve (73), first valve body (71) are equipped with first main water route (711) and first bypass water route (712), the both ends of first main water route (711) respectively with the outside water supply rivers detection device (5) intake the end intercommunication be equipped with on first main water route (711) and be used for adjusting and stabilize first current regulator (72) of discharge, the end of intaking and the play water end of first bypass water route (712) respectively with first current regulator (72) intake end and play water end intercommunication, control valve (73) set up in be used for controlling on first valve body (71) the break-make in first bypass water route (712), controller (8) respectively with go out water temperature detection device (41), rivers detection device (5) gas proportional valve (6) and control valve (73) electric connection.
2. The gas water heater capable of realizing multi-stage flow limiting and temperature control according to claim 1, wherein the flow limiting value of the first flow stabilizer (72) is larger than the minimum starting flow of the water heater, and the flow limiting value of the first flow stabilizer (72) is smaller than the maximum water flow of the water heater.
3. The gas water heater capable of achieving multi-stage flow limiting and temperature controlling according to claim 1, further comprising a second water regulating device (9), wherein the second water regulating device (9) comprises a second valve body (91), a second flow stabilizer (92) and the control valve (73), the second valve body (91) is provided with a second main water channel (911) and a second bypass water channel (912), two ends of the second main water channel (911) are respectively communicated with a water outlet end of the first main water channel (711) and a water inlet end of the water flow detection device (5), the second main water channel (911) is provided with the second flow stabilizer (92) for adjusting and stabilizing water flow, the water inlet end and the water outlet end of the second bypass water channel (912) are respectively communicated with the water inlet end and the water outlet end of the second flow stabilizer (92), and the control valve (73) is arranged on the second valve body (91) and electrically connected with the controller (8) for controlling the second bypass water channel (912) ) Make and break of (2).
4. The gas water heater capable of realizing multi-stage flow limiting and temperature control according to claim 3, wherein the flow limiting value of the second flow stabilizer (92) is larger than that of the first flow stabilizer (72), and the flow limiting value of the second flow stabilizer (92) is smaller than the maximum water flow of the water heater.
5. The gas water heater capable of realizing multi-stage flow limiting and temperature control according to any one of claims 1-4, further comprising a water inlet joint (30) and a main flow stabilizer (10), wherein the water inlet joint (30) is communicated with the water inlet end of the first main water channel (711), the main flow stabilizer (10) is arranged in the water inlet joint (30) or the water inlet end of the first main water channel (711), and the flow limiting value of the main flow stabilizer (10) is the maximum water flow of the water heater.
6. The gas water heater capable of realizing multi-stage flow limiting and temperature controlling according to claim 1, further comprising an inlet water temperature detection device (42), wherein the inlet water temperature detection device (42) is arranged on the inlet pipe (31) and electrically connected with the controller (8).
7. A control method for applying the gas water heater of any one of claims 1-6, characterized in that the control method comprises the steps of:
s1: all control valves (73) are controlled to be closed, and the bathing mode is started when the water heater is started and ignited;
s2: controlling the opening degree of the fuel gas proportional valve (6) and the working state of each control valve (73) at least according to the magnitude relation between the real-time outlet water temperature Ti and the preset temperature Ts;
s3: acquiring and judging whether the real-time inflow flow is less than or equal to the shutdown flow of the water heater, if so, entering a step S4, otherwise, returning to the step S2;
s4: and (4) closing the gas proportional valve (6) and all control valves (73), and exiting the bathing mode.
8. The control method according to claim 7, wherein the step of controlling the opening degree of the gas proportional valve (6) and the working states of all the control valves (73) at least according to the magnitude relation between the real-time outlet water temperature Ti and the preset temperature Ts comprises the following steps:
s201: automatically adjusting the opening degree of the fuel gas proportional valve (6) according to the difference value of the real-time outlet water temperature Ti and the preset temperature Ts;
s202: acquiring and judging whether the real-time outlet water temperature Ti is greater than or equal to a preset temperature Ts, if so, entering step S203, otherwise, judging the relation between the real-time inlet water flow and the shutdown flow of the water heater, and returning to step S201 or entering step S4 according to the judgment result;
s203: calculating the maximum hot water flow of the water heater according to the rated hot water producing capacity of the water heater, the preset temperature Ts and the water temperature obtained when the water heater is started and ignited;
s204: controlling the operating state of each control valve (73) according to the maximum hot water flow;
s205: and (4) readjusting the opening of the gas proportional valve (6), and controlling the outlet water temperature Ti of the water heater according to the preset temperature Ts.
9. The control method according to claim 8, wherein in step S203, the maximum hot water flow rate of the water heater is calculated by the following formula: vmax 25VProduce waterThe water heater is characterized in that the water heater is/△ T, △ T-Ti 0-Ts-Ta 0, wherein Vmax is the maximum hot water flow of the water heater, and VProduce water△ T is a target heating temperature difference for the rated hot water production capacity of the water heater, Ti0 is the initial outlet water temperature when the water heater is started and ignited, and Ta0 is the initial inlet water temperature when the water heater is started and ignited.
10. The control method according to claim 8, wherein the opening degree of the gas proportional valve (6) and the working states of all the control valves (73) are controlled at least according to the magnitude relation between the real-time outlet water temperature Ti and the preset temperature Ts, and the method further comprises the following steps:
s206: obtaining and judging the size relationship between the real-time outlet water temperature Ti and the preset temperature Ts again, if Ti is less than Ts, entering step S207, if Ti is equal to Ts, maintaining the current bathing working state and returning to step S205, and if Ti is more than Ts, entering step S210;
s207: acquiring and judging whether the opening degree of the gas proportional valve (6) is at the maximum opening degree or not, if so, entering step S208, otherwise, returning to step S205;
s208: judging whether the water heater is in a minimum water flow gear, if so, maintaining the current bathing working state and returning to the step S205, and if not, entering the step S209;
s209: controlling the working state of each control valve (73), reducing the water flow gear of the water heater and returning to the step S205;
s210: acquiring and judging whether the opening degree of the gas proportional valve (6) is at the minimum opening degree or not, if so, entering step S211, and if not, returning to step S205;
s211: judging whether the water heater is in a maximum water flow gear, if so, maintaining the current bathing working state and returning to the step S205, and if not, entering the step S212;
s212: and controlling the working state of each control valve (73), increasing the water flow gear of the water heater and returning to the step S205.
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| CN112524681A (en) * | 2020-11-11 | 2021-03-19 | 华帝股份有限公司 | Wall-mounted boiler and control method thereof |
| CN113531915A (en) * | 2021-07-28 | 2021-10-22 | 华帝股份有限公司 | Water temperature adjusting method and device |
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