CN114234437B - Water heater and control method thereof - Google Patents
Water heater and control method thereof Download PDFInfo
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- CN114234437B CN114234437B CN202111522182.5A CN202111522182A CN114234437B CN 114234437 B CN114234437 B CN 114234437B CN 202111522182 A CN202111522182 A CN 202111522182A CN 114234437 B CN114234437 B CN 114234437B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 933
- 238000000034 method Methods 0.000 title claims abstract description 64
- 230000008569 process Effects 0.000 claims abstract description 27
- 230000008859 change Effects 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims description 20
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 description 14
- 230000001276 controlling effect Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 206010053615 Thermal burn Diseases 0.000 description 2
- 238000003287 bathing Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000007788 liquid Substances 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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/124—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium 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
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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
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2028—Continuous-flow heaters
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- Control For Baths (AREA)
Abstract
The application relates to a water heater and a control method thereof. The method comprises the following steps: when a starting instruction is received, acquiring normal water flow, water inlet temperature and preset water outlet temperature; the normal water flow is the water flow when the water valve is in an open state and the water pump is in a closed state; in the process of the impact bath, when the switching state of the water valve or the switching state of the water pump is detected to change, determining the current impact water flow according to the switching state of the water valve, the switching state of the water pump and the normal water flow; and determining the current actual power of the water heater according to the current impact water flow, the water inlet temperature, the preset water outlet temperature and the preset overall efficiency, so that the water heater heats according to the current actual power. According to the embodiment of the application, the water outlet flow is matched with the preset water outlet temperature, the regulation and control capability of the water outlet temperature is improved, the water outlet temperature is the preset water outlet temperature, the water outlet temperature change caused by water outlet flow fluctuation is avoided to be large, and the bath comfort is improved.
Description
Technical Field
The application relates to the technical field of water heaters, in particular to a water heater and a control method thereof.
Background
At present, the impact bath has the functions of washing and massaging, and the use of the impact bath has become the trend of the water heater industry, so that the impact bath is more and more favored by consumers; water heaters on the market can be realized by linearly and circularly changing the temperature of discharged water within a set range through program adjustment.
However, in the process of impact bath, the regulation and control capability of the outlet water temperature is weaker, and when the water flow rate of the outlet water changes suddenly, the variation range of the outlet water temperature is larger, so that the bath comfort of a user is reduced.
Disclosure of Invention
The application provides a shortcoming to current mode for solve the great technical problem of water temperature variation in the impact bath in-process that prior art exists.
In a first aspect, an embodiment of the present application provides a control method of a water heater, where the water heater includes a water valve and a water pump for implementing an impact bath function, and the control method of the water heater includes: when a starting instruction is received, acquiring normal water flow, water inlet temperature and preset water outlet temperature; the normal water flow is the water flow when the water valve is in an open state and the water pump is in a closed state; in the process of the impact bath, when the switching state of the water valve or the switching state of the water pump is detected to change, determining the current impact water flow according to the switching state of the water valve, the switching state of the water pump and the normal water flow; and determining the current actual power of the water heater according to the current impact water flow, the water inlet temperature, the preset water outlet temperature and the preset overall efficiency, so that the water heater heats according to the current actual power.
As an optional implementation manner, the formula for determining the actual power of the water heater according to the current impact water flow, the water inlet temperature, the preset water outlet temperature and the preset overall efficiency is as follows: q (Q) Actual practice is that of =c×l× (T1-T2)/η/60; wherein Q is Actual practice is that of The water heater is characterized in that the water heater is in actual power, the specific heat capacity of water is C, the current impact water flow is L, the preset water outlet temperature is T1, the water inlet temperature is T2, and the overall efficiency is eta.
As an alternative embodiment, the control method of the water heater further includes: if the normal water flow is not greater than the first water flow, locking the water valve and the water pump; if the normal water flow is larger than the first water flow and not larger than the second water flow, closing the water valve after a preset time period; after closing the water valve for a preset period of time, simultaneously opening the water pump and the water valve; simultaneously turning on the water pump and the water valve for a preset time period, turning off the water pump, and repeatedly executing the water valve step after the preset time period until a closing instruction is received; if the normal water flow is greater than the second water flow, closing the water valve after a preset time period; and after the water valve is closed for a preset time period, opening the water valve, and repeatedly executing the water valve closing step after the preset time period until a closing instruction is received.
As an alternative embodiment, the control method of the water heater further includes: if the determined actual power of the water heater is greater than the maximum overall power, reducing the water outlet temperature to a target water outlet temperature, and re-determining the current actual power of the water heater according to the current impact water flow, the water inlet temperature, the target water outlet temperature and the preset overall efficiency; if the current actual power is less than or equal to the maximum overall power, heating the water heater according to the current actual power; if the determined current actual power is larger than the preset complete machine power, the water pump is turned off until the impact bath is finished.
As an optional implementation manner, the formula for determining the current impact water flow according to the on-off state of the water valve, the on-off state of the water pump and the normal water flow is as follows: l (L) Closing valve ＝(7.1×L Normal state -1.8)/13；L Pump on ＝(9.3×L Normal state +69.6)/13; wherein L is Closing valve For the impact water flow rate when the water valve and the water pump are in the closed state, L Normal state Is normal water flow, L Pump on And the water valve and the water pump are in an open state.
In a second aspect, embodiments of the present application provide a water heater including a controller, a water valve for implementing an impingement bath function, and a water pump; when a starting instruction is received, the controller is used for acquiring normal water flow, water inlet temperature and preset water outlet temperature; the normal water flow is the water flow when the water valve is in an open state and the water pump is in a closed state; in the process of impact bath, when the switching state of the water valve or the switching state of the water pump is detected to change, the controller determines the current impact water flow according to the switching state of the water valve, the switching state of the water pump and the normal water flow; the controller determines the current actual power of the water heater according to the current impact water flow, the water inlet temperature, the preset water outlet temperature and the preset overall efficiency, so that the water heater heats according to the current actual power.
As an alternative embodiment, the controller determines the formula of the actual power of the water heater according to the following formula: q (Q) Actual practice is that of =c×l× (T1-T2)/η/60; wherein Q is Actual practice is that of For practical power, C is the specific heat capacity of water, L is the current impact water flow, T1 is the preset water outlet temperature, T2 is the water inlet temperature, and eta is the overall efficiency.
As an alternative embodiment, the controller is configured to lock the water valve and the water pump if the normal water flow is not greater than the first water flow; if the normal water flow is greater than the first water flow and not greater than the second water flow, the controller is used for closing the water valve after a preset time period; after closing the water valve for a preset period of time, the controller is used for simultaneously opening the water pump and the water valve; after the water pump and the water valve are started for a preset time, the controller is used for closing the water pump, and the water valve is closed after the preset time is repeatedly executed until a closing instruction is received; if the normal water flow is greater than the second water flow, the controller is used for closing the water valve after a preset time period; and after closing the water valve for a preset time period, the controller is used for opening the water valve, and repeatedly executing the water valve closing step after the preset time period until a closing instruction is received.
As an optional implementation manner, if the determined actual power of the water heater is greater than the maximum overall power, the controller reduces the outlet water temperature to a target outlet water temperature, and redetermines the current actual power of the water heater according to the current impact water flow, the inlet water temperature, the target outlet water temperature and the preset overall efficiency; if the current actual power is less than or equal to the maximum overall power, heating the water heater according to the current actual power; and if the re-determined current actual power is greater than the preset complete machine power, the controller turns off the water pump until the impact bath is finished.
As an alternative embodiment, the controller determines the current impingement water flow rate according to the following formula: l (L) Closing valve ＝(7.1×L Normal state -1.8)/13；L Pump on ＝(9.3×L Normal state +69.6)/13; wherein L is Closing valve For the impact water flow rate when the water valve and the water pump are in the closed state, L Normal state Is normal water flow, L Pump on And the water valve and the water pump are in an open state.
The utility model provides a water heater and control method thereof, according to normal water flow, the impact water flow when water valve and water pump all are in the closed state, and the impact water flow when water valve and water pump all are in the open state, and combine the water temperature rising value of default outlet water temperature and inlet water temperature determination, confirm the heating load in advance, when confirming the state of water pump and water valve state switching, heat inlet water according to the heating load of confirming, realize accurate heating, make outlet water temperature be the outlet water temperature of default throughout in the impact bath process, realize the purpose of quick accuse temperature under the rivers abrupt change condition, with the regulation and control ability and the stability of improvement outlet water temperature, user scald that has avoided the great temperature fluctuation to cause, safety in utilization and bathing comfort have been improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a water heater according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a water valve in a water heater according to an embodiment of the present disclosure in a closed state;
FIG. 3 is a schematic diagram of a water valve in a water heater according to an embodiment of the present disclosure in an open state;
FIG. 4 is a schematic flow chart of a control method of a water heater according to an embodiment of the present disclosure;
fig. 5 is a schematic flow chart of specific steps of obtaining a normal water flow, a water inlet temperature and a preset water outlet temperature when a start command is received in the control method of the water heater provided in the embodiment of the present application;
FIG. 6 is a schematic flow chart of a control method of a water heater according to another embodiment of the present disclosure;
FIG. 7 is a graph of correspondence between the flow rate of impinging water and the flow rate of normal water in a control method of a water heater according to an embodiment of the present application;
FIG. 8 is a graph of the correspondence between proportional valve current, 2 fire, 4 fire, 6 fire, and load in a control method of a water heater according to an embodiment of the present disclosure;
fig. 9 is a schematic flow chart of a specific method in a control method of a water heater according to an embodiment of the present application.
Reference numerals and corresponding description of the drawings:
1: a water heater main body;
2: a control panel;
3: a water inlet pipe;
4: a water flow sensor;
5: a water inlet temperature sensor;
6: a water valve; 61: a valve body; 62: a valve seat;
7: a water pump;
8: a controller;
l1: a first water inlet channel width;
l2: a first water inlet channel width;
a1: defining a relation curve of inflow water flow when the water pump is in a closed state and the water valve is in an open state and impact water flow when the water valve and the water pump are in the closed state as a relation straight line after linear relation;
a2: defining a relation curve of inflow water flow when the water pump is in a closed state and the water valve is in an open state and impact water flow when the water valve and the water pump are both in the open state as a relation straight line after linear relation;
A3:2, a corresponding relation line of the proportional valve current and the load for discharging fire;
a4:4, a corresponding relation line of the proportional valve current and the load for discharging fire;
a5: and 6, a proportional valve current of fire discharge and a corresponding relation line of load.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
First, the description and explanation of the nouns involved in the present application will be given:
watts is the unit of power in international units. Watts are defined as 1J/sec, i.e., how much energy (measured in joules) is converted, used, or dissipated per second, with 1W representing 1J of work done for 1s of object. Kilowatts are more commonly used in daily life as a unit, 1 kw=1000 watts.
Specific heat capacity refers to the mass of a substance, and the ratio of the heat absorbed or released to the product of the mass of the substance and the elevated temperature, when the temperature is increased or decreased, is referred to as the specific heat capacity of the substance, and is denoted by symbol C. The units in the international system of units are joules per kilogram kelvin or joules per kilogram per degree celsius. I.e. the energy required to raise (or lower) the temperature of 1 kg of substance by 1 kelvin. Specific heat capacity is a physical quantity commonly used in thermodynamics and represents the ability of a substance to raise the temperature by heat, rather than the ability to absorb or dissipate heat. The specific heat capacity of water at normal pressure of liquid water is 4.2 joules per kilogram per degree celsius.
The inventor of the application considers that in the process of using the impact bath function, the water quantity suddenly changes to generate severe fluctuation of the water temperature, the problem of water temperature overshoot easily occurs, the user experience is poor, and particularly when the water quantity is changed into a small water quantity, the risk of scalding the user exists.
The water heater and the control method thereof aim to solve the technical problem of large temperature change of water outlet in the impact bath process in the prior art.
The following describes the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems in detail with specific embodiments.
The water heater may be an electric water heater, a gas water heater, a magnetic energy water heater, etc., and for convenience of description, the water heater in this embodiment is a gas water heater.
The structure of the water heater is shown in fig. 1, and the gas water heater comprises a water heater main body 1, a control panel 2 and a water inlet pipeline 3. At least part of the water inlet pipeline 3 is arranged inside the water heater main body 1 and is used for feeding water into the water heater main body 1 to heat up and then output out of the water heater main body 1; the control panel 2 is arranged outside the water heater main body 1, so that a user can conveniently switch the functions and the states of the gas water heater. The water inlet end of the water inlet pipeline 3 is provided with a water flow sensor 4, and the rear end of the water flow sensor 4 can be sequentially provided with a water inlet temperature sensor 5, a water valve 6 and a water pump 7.
The water heater main body 1 is a main body which forms hot water output through heat exchange after the gas of the gas water heater is combusted; the water flow sensor 4 can feed back the water flow of the water in real time through detecting the water flow signal of the water inflow; the water inlet temperature sensor 5 is used for feeding back the water inlet temperature in real time.
The control panel 2 includes keys for turning on and off, keys for controlling the start and stop of the impact bath, keys for inputting a preset water outlet temperature, and a display area for displaying the water temperature.
The schematic structure of the water valve 6 in the closed state is shown in fig. 2, L1 in fig. 2 is the first water inlet channel width, the schematic structure of the water valve 6 in the open state is shown in fig. 3, and L2 in fig. 3 is the second water inlet channel width. When the water valve 6 is in a closed state, a first water inlet channel is formed between the valve body 61 of the water valve 6 and the valve seat 62; when the water valve 6 is in the open state, a second water inlet channel is formed between the valve body 61 and the valve seat 62 of the water valve 6, wherein the first water inlet channel width L1 may be a quarter of the second water inlet channel width L2. The pressure of the inflow water flow is increased or reduced by controlling the rotating speed of the water pump 7; the change of the water inlet channel is realized by controlling the opening and closing of the water valve 6. By controlling the states of the water pump 7 and the water valve 6, the adjustment of the water inlet channel and the pressure of the water inlet flow is realized, the change of the water flow of the water outlet flow is realized, and the impact bath function is realized.
The embodiment of the application provides a control method of a water heater, as shown in fig. 4, the control method of the water heater comprises steps S100-S120:
s100: when a starting instruction is received, the normal water flow, the water inlet temperature and the preset water outlet temperature are obtained.
Before the gas water heater starts the impact bath, the water pump 7 is in a closed state, the water valve 6 is in an open state, and the normal water flow is the water flow when the water valve 6 is in the open state and the water pump 7 is in the closed state; after the user sets the preset water outlet temperature through the keys of the control panel 2 and starts the impact bath, the normal water flow is obtained through the water flow sensor 4, and the water inlet temperature is obtained through the water inlet temperature sensor 5.
S110: in the process of the impact bath, when the switching state of the water valve 6 or the switching state of the water pump 7 is detected to change, the current impact water flow is determined according to the switching state of the water valve 6, the switching state of the water pump 7 and the normal water flow.
After the normal water flow is obtained, the impact water flow when the water valve 6 and the water pump 7 are in the closed state and the impact water flow when the water valve 6 and the water pump 7 are in the open state can be determined according to a preset algorithm. The current impact water flow is the impact water flow when the water valve 6 and the water pump 7 are in the closed state, the impact water flow when the water valve 6 and the water pump 7 are in the open state, or the normal water flow when the water pump 7 is in the closed state and the water valve 6 is in the open state.
As an alternative embodiment, the formula for determining the current striking water flow rate according to the on-off state of the water valve 6, the on-off state of the water pump 7 and the normal water flow rate is as follows:
L closing valve ＝(7.1×L Normal state -1.8)/13；
L Pump on ＝(9.3×L Normal state +69.6)/13；
Wherein L is Closing valve For the flow rate of the impinging water when the water valve 6 and the water pump 7 are both in the closed state, L Normal state Is normal water flow, L Pump on For the flow of impinging water when both the water valve 6 and the water pump 7 are in an open state.
S120: and determining the current actual power of the water heater according to the current impact water flow, the water inlet temperature, the preset water outlet temperature and the preset overall efficiency.
The preset water outlet temperature and the water inlet temperature can be differentiated, the temperature to be increased is determined, and the load of the gas water heater when the current impact water flow is increased to the preset water outlet temperature can be obtained by combining the determined front impact water flow. According to the preset overall efficiency and theoretical power, determining the current actual power of the water heater, and enabling the water heater to heat the determined front impact water flow according to the current actual power, so that the water outlet temperature is the preset water outlet temperature.
As an alternative implementation manner, the formula for determining the actual power of the water heater according to the current impact water flow rate, the water inlet temperature, the preset water outlet temperature and the preset overall efficiency is as follows:
Q Actual practice is that of ＝C×L×(T1-T2)/η/60；
Wherein Q is Actual practice is that of The water heater is characterized in that the water heater is in actual power, the specific heat capacity of water is C, the current impact water flow is L, the preset water outlet temperature is T1, the water inlet temperature is T2, and the overall efficiency is eta.
The embodiment of the application provides a control method of a water heater, according to normal water flow, the impact water flow when a water valve 6 and a water pump 7 are in a closed state and the impact water flow when the water valve 6 and the water pump 7 are in an open state are determined, and a water inlet heating value determined by combining a preset water outlet temperature and a water inlet temperature is used for determining a heating load in advance, when the state of the water pump 7 and the state of the water valve 6 are determined to be switched, the water inlet is heated according to the determined heating load, the accurate heating is realized, the water outlet temperature is always the preset water outlet temperature in the impact bath process, the purpose of rapid temperature control under the condition of abrupt change of water flow is realized, the regulation capacity and stability of the water outlet temperature are improved, user scalding caused by large temperature fluctuation is avoided, and the use safety and the bath comfort are improved.
As an alternative embodiment, as shown in fig. 5, the control method of the water heater further includes steps S200 to S221:
s200: if the normal water flow is not greater than the first water flow, the water valve 6 and the water pump 7 are locked.
When the water flow sensor 4 detects that the water flow is not greater than the first water flow, the water valve 6 cannot be started in a closed state, and in order to ensure the normal operation of the gas water heater, the water valve 6 and the water pump 7 are required to be locked, so that the impact bath function cannot be started. Optionally, the first water flow rate is 4 liters per minute.
S210: if the normal water flow is greater than the first water flow and not greater than the second water flow, the water valve 6 is closed after a preset period of time.
Under the condition that the impact bath can be started, after the impact bath is started for a preset period of time, the water valve 6 is closed, and the second water inlet channel is switched into the first water inlet channel, so that the water inlet flow is reduced, the water outlet flow is further reduced, and the purpose of reducing the water outlet is achieved. The preset duration may be preset and readjusted. Alternatively, the preset duration may be 3 seconds. Optionally, the second water flow rate is 10 liters per minute.
S211: after closing the water valve 6 for a preset period of time, the water pump 7 and the water valve 6 are simultaneously turned on.
After the preset time length of the inflow water flow is reduced, the inflow water flow is increased by simultaneously starting the water pump 7 and the water valve 6 and switching the first inflow channel into the second inflow channel, and meanwhile, the inflow water flow pressure is increased to increase the inflow water flow, so that the increase of the outflow water flow is further realized, and the purpose of increasing the outflow water is achieved.
S212: and after the water pump 7 and the water valve 6 are started for a preset time, the water pump 7 is turned off, and the water valve 6 is turned off after the preset time is repeatedly executed until a turn-off instruction is received.
After the preset time period of the inflow water flow is increased, the inflow water flow pressure is reduced by closing the water pump 7, so that the inflow water flow is reduced, the reduction of the outflow water flow is further realized, and after the preset time period, the step of closing the water valve 6 after the preset time period is repeated, so that the outflow water amount in the impact bath process shows periodic change.
When the normal water flow is greater than the first water flow and not greater than the second water flow, the state changes of the water pump 7 and the water valve 6 in the process of the impact bath include:
first state: the water pump 7 is in a closed state and the water valve 6 is in an open state.
Second state: the water pump 7 and the water valve 6 are both in a closed state.
Third state: both the water pump 7 and the water valve 6 are in an open state.
In the process of the impact bath, the first state is switched to the second state, the second state is switched to the third state, and the third state is switched to the periodic switching of the first state, so that the water yield is correspondingly changed from reduced to increased and then to reduced periodicity, and the impact bath function is realized.
S220: if the normal water flow is greater than the second water flow, after a preset period of time, the water valve 6 is closed.
When the water flow sensor 4 detects that the normal water flow is larger than the second water flow, the effect of realizing pressurization by controlling the water pump 7 to be started is not obvious, and under the condition, the water pump 7 is always in a closed state and does not participate in the regulation of the water flow of the discharged water.
After the preset time period, the second water inlet channel is switched to the first water inlet channel by closing the water valve 6 so as to reduce the water inlet flow, reduce the water outlet flow and further reduce the water outlet.
S221: after the water valve 6 is closed for a preset time period, the water valve 6 is opened, and the step of closing the water valve 6 after the preset time period is repeatedly executed until a closing instruction is received.
After the preset time period of the inflow water flow is reduced, the first inflow channel is switched to the second inflow channel by opening the water valve 6, the inflow water flow is increased, so that the increase of the outflow water flow is realized, and after the preset time period, the steps of closing the water valve 6 after the preset time period are repeated, so that the outflow water amount in the impact bath process is periodically changed.
When the normal water flow is greater than the second water flow, the state changes of the water pump 7 and the water valve 6 in the process of the impact bath include:
Fourth state: the water pump 7 is in a closed state and the water valve 6 is in an open state.
Fifth state: the water pump 7 and the water valve 6 are both in a closed state.
Through switching from the fourth state to the fifth state and then from the fifth state to the fourth state, the change from the decrease to the increase of the water flow of the effluent is sequentially realized, and the impact bath function is realized.
For the initial state of the water pump 7 and the water valve 6 in the impact bath stage and in the process of regulating and controlling the water flow of the discharged water, the regulation rules of the states of the water pump 7 and the water valve 6 can be preset and re-set, and different impact effects can be realized by regulating the switching rules of the states of the water pump 7 and the water valve 6.
As an alternative embodiment, as shown in fig. 6, the control method of the water heater further includes steps S300 to S320:
s300: if the determined actual power of the water heater is greater than the maximum overall power, the outlet water temperature is reduced to the target outlet water temperature, and the current actual power of the water heater is redetermined according to the current impact water flow, the inlet water temperature, the target outlet water temperature and the preset overall efficiency.
When the actual power of the water heater is determined to be larger than the maximum overall power, the water outlet temperature can be reduced to the target water outlet temperature in order to still realize the impact bath function, and the current actual power of the water heater is re-determined. The absolute value of the difference between the water outlet temperature and the target water outlet temperature is a preset temperature difference. Optionally, the preset temperature difference is greater than 1 degree celsius and not greater than 3 degrees celsius.
S310: and if the redetermined current actual power is smaller than or equal to the maximum overall power, the water heater heats according to the redetermined current actual power.
S320: if the determined current actual power is larger than the preset complete machine power, the water pump 7 is turned off until the impact bath is finished.
In a specific embodiment, as shown in table 1, the inflow water flow rates of the gas water heater in different states of the water valve 6 and the water pump 7 during the impact bath are predetermined.
Table 1 inflow Water flow during the impact bath when the water valve 6 and the water pump 7 are in different states
As is clear from table 1, the normal water flow rate of the gas water heater is not less than 3 liters per minute and not more than 16 liters per minute, the impact water flow rate when the water valve 6 and the water pump 7 are both in the on state is not less than 7.5 liters per minute and not more than 16.8 liters per minute, and the impact water flow rate when the water valve 6 and the water pump 7 are both in the off state is not less than 1.5 liters per minute and not more than 8.6 liters per minute.
The corresponding relation diagram of the impact water flow and the normal water flow is shown in fig. 7. A1 is a relation curve of inflow water flow when the water pump is in a closed state and the water valve is in an open state and impact water flow when the water valve and the water pump are both in the closed state, and the relation curve is defined as a relation straight line after linear relation; a2 is a relation curve of inflow water flow when the water pump is in a closed state and the water valve is in an open state and impact water flow when the water valve and the water pump are both in the open state, and the relation curve is defined as a relation straight line after linear relation.
The corresponding relationship curve between the inflow water flow (normal water flow) and the impact water flow (including the impact water flow in the pump-off state and the valve-off state, and the impact water flow in the valve-on state and the valve-on state) when the water pump 7 is in the closed state and the water valve 6 is in the open state, which is obtained according to table 1, can be obtained by defining the curve in fig. 7 as a linear relationship:
L closing valve ＝(7.1×L Normal state -1.8)/13；
L Pump on ＝(9.3×L Normal state +69.6)/13；
Wherein L is Closing valve For the flow rate of the impinging water when the water valve 6 and the water pump 7 are both in the closed state, L Normal state Is normal water flow, L Pump on For the flow of impinging water when both the water valve 6 and the water pump 7 are in an open state.
In addition, the process of defining the curve as a linear relationship is the prior art, and will not be described in detail.
For any water heater, the corresponding relation between the normal water flow and the current impact water flow can be predetermined by the method, so that in the use process, the corresponding front impact water flow can be obtained quickly after the normal water flow is determined.
In the process of impact bath, the preset outlet water temperature and the inlet water temperature are unchanged, so the temperature difference between the preset outlet water temperature and the inlet water temperature is unchanged, namely the temperature of the temperature rise is unchanged, and when the flow of the inlet water is changed, the actual load of the corresponding gas water heater needs to be determined in order that the outlet water temperature is the preset outlet water temperature.
The actual load of the gas water heater can be calculated according to the energy formula Q=C×M×ΔTand the formula Q Actual practice is that of ＝Q Theory of And/eta.
Wherein C is the specific heat capacity of water, M is the mass of the inlet water, deltaT is the heating value of the water, namely the absolute value of the difference value between the preset outlet water temperature and the inlet water temperature, Q Theory of For theoretical load of gas water heater, Q Actual practice is that of Is the actual load of the gas water heater, and eta is the efficiency of the whole machine.
For example, the gas water heater is of a two-stage energy-efficient type, under the condition that the water flow is in a nominal lifting number, the normal water flow is 16 liters per minute, the highest temperature rise when the gas water heater burns with the maximum actual load is 25 ℃, the overall efficiency of the corresponding two-stage energy-efficient type is 89%, namely 0.89, Q Theory of ＝4.2x10 3 x16 x25/60＝28kW，Q Actual practice is that of ＝Q Theory of /0.89＝31.5kW。
In the embodiment, the load of the gas water heater is controlled by adopting a gas proportional valve in a 2-4-6 sectional mode.
As shown in fig. 8, a map of correspondence between proportional valve current of 2 fire rows, 4 fire rows, 6 fire rows, and load is shown, wherein A3 is a correspondence line between proportional valve current of 2 fire rows and load, A4 is a correspondence line between proportional valve current of 4 fire rows and load, A5 is a correspondence line between proportional valve current of 6 fire rows and load, and shaded portions in the map are load overlapping sections of 2 fire rows and 4 fire rows, and 4 fire rows and 6 fire rows.
The load range can be adjusted with the same proportional valve current for different fire row numbers. Wherein the 2-fire load ranges from 3 to 10 kilowatts, the 4-fire load ranges from 8 to 20 kilowatts, and the 6-fire load ranges from 15 to 32 kilowatts.
After the actual load of the gas water heater is determined, the proportional valve current and the required fire row number can be determined according to the corresponding relation between the proportional valve current and different load sections. When the determined actual load of the gas water heater is the load overlapping section with different section numbers, selecting the adjacent load section as the preferable switching. For example, when the actual load of the gas water heater is determined to be 17 kw and the 17 kw is the load overlapping section of 4-row fire and 6-row fire, when switching from 2-row load fire, the gas water heater needs to be switched to 4-row fire adjacent to the gas water heater for heating.
From the above, according to the water outlet temperature and the water inlet temperature preset by the user, the temperature rise difference is determined, and the normal water flow obtained by the water flow sensor 4 is determined by using the formula (L Closing valve ＝(7.1×L Normal state -1.8)/13 and L Pump on ＝(9.3×L Normal state +69.6)/13) determines the percussion water flow rate at different states of the water valve 6 and the water pump 7, and determines the current percussion water flow rate according to the states of the water valve 6 and the water pump 7. According to q=c×m×Δt, and Q Actual practice is that of ＝Q Theory of The corresponding actual load can be determined by eta, the corresponding proportional valve current is determined according to the actual load value in a preset relation table of the actual load and the proportional valve current, and the proportional valve current is adjusted according to the determined proportional valve current, so that the accurate heating of the inlet water is realizedThe water outlet temperature is the preset water outlet temperature, and the purpose of constant temperature is achieved.
In this embodiment, as shown in fig. 9, after a user sets a preset water outlet temperature and turns on the impact bath function, the water inlet temperature is obtained through the water inlet temperature sensor 5, and the normal water flow is obtained through the water flow sensor 4.
The current impact water flow can be determined according to the on-off state of the water valve, the on-off state of the water pump and the normal water flow, and the actual power of the water heater is determined according to the current impact water flow, the water inlet temperature, the preset water outlet temperature and the preset overall efficiency.
If the determined actual power of the water heater is greater than the maximum overall power, the controller reduces the water outlet temperature to the target water outlet temperature, and the current actual power of the water heater is redetermined according to the current impact water flow, the water inlet temperature, the target water outlet temperature and the preset overall efficiency; if the current actual power is less than or equal to the maximum overall power, the water heater heats according to the current actual power; if the determined current actual power is greater than the preset complete machine power, the controller turns off the water pump until the impact bath is finished.
It can be later determined that the water valve 6 and the water pump 7 are locked if the normal water flow is not greater than the first water flow.
If the normal water flow is greater than the first water flow and not greater than the second water flow, determining the impact water flow when the water valve 6 and the water pump 7 are both in the closed state and the impact water flow when the water valve 6 and the water pump 7 are both in the open state according to the normal water flow. Heating the water heater in a preset time period with the current actual power of the water heater determined according to the normal water flow, so that the water outlet temperature is the preset water outlet temperature; after a preset time period, closing the water valve 6, reducing the water flow of the water outlet, and heating by the determined current actual power of the water heater according to the impact water flow when the water valve 6 and the water pump 7 are both in a closed state, so that the water outlet temperature is the preset water outlet temperature; after the water valve 6 is closed for a preset time period, the water pump 7 and the water valve 6 are simultaneously opened, the water outlet flow rate is increased, the current actual power of the water heater is determined according to the impact water flow rate when the water valve 6 and the water pump 7 are both in an opened state, the water outlet temperature is the preset water outlet temperature, the steps of closing the water valve 6 after the preset time period are repeated, the water outlet rate in the impact bath process is periodically changed, and the water outlet temperature is kept to be the preset water outlet temperature until a user closes the impact bath function.
If the normal water flow is greater than the second water flow, determining the impact water flow when the water valve 6 and the water pump 7 are in the closed state according to the normal water flow. Heating the water heater in a preset time period with the current actual power of the water heater determined according to the normal water flow, so that the water outlet temperature is the preset water outlet temperature; after the preset time period, the water valve 6 is closed, the water flow of the water outlet is reduced, the current actual power of the water heater is determined to heat according to the impact water flow when the water valve 6 and the water pump 7 are in the closed state, the water outlet temperature is the preset water outlet temperature, after the water valve 6 is closed for the preset time period, the water valve 6 is opened, the current actual power of the water heater is determined according to the normal water flow to heat, the water outlet temperature is the preset water outlet temperature, the steps of closing the water valve 6 after the preset time period are repeated, the water outlet in the impact bath process is periodically changed, and the water outlet temperature is kept to be the preset water outlet temperature until a user closes the impact bath function.
It should be understood that, although the steps in the flowcharts of fig. 4 to 6 and 9 are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least a portion of the steps of fig. 4-6, and 9 may include steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor does the order in which the steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the steps or stages in other steps.
It should be understood that the same/similar parts of the embodiments of the method described above in this specification may be referred to each other, and each embodiment focuses on differences from other embodiments, and references to descriptions of other method embodiments are only needed.
Based on the same inventive concept, as shown in fig. 1, the embodiment of the present application provides a water heater, which comprises a controller 8, a water valve 6 for realizing the impact bath function and a water pump 7; when receiving a starting instruction, the controller 8 is used for acquiring normal water flow, water inlet temperature and preset water outlet temperature; the normal water flow is the water flow when the water valve 6 is in an open state and the water pump 7 is in a closed state; in the process of the impact bath, when the switching state of the water valve 6 or the switching state of the water pump 7 is detected to change, the controller 8 determines the current impact water flow according to the switching state of the water valve 6, the switching state of the water pump 7 and the normal water flow; the controller 8 determines the current actual power of the water heater according to the current impact water flow rate, the water inlet temperature, the preset water outlet temperature and the preset overall efficiency, so that the water heater heats according to the current actual power.
The embodiment of the application provides a water heater, according to normal water flow, the impact water flow when confirming that water valve 6 and water pump 7 are in the closed state, and the impact water flow when water valve 6 and water pump 7 are in the open state, and combine the water temperature rising value of default outlet water temperature and inlet water temperature determination, confirm the heating load in advance, when confirming the state of water pump 7 and water valve 6 state switch, heat inlet water according to the heating load of confirming, realize accurate heating, make outlet water temperature be the outlet water temperature of default throughout in the impact bath process, realize the purpose of quick accuse temperature under the rivers abrupt change condition, with the regulation and control ability and the stability of improving outlet water temperature, user's scald that the temperature fluctuation is great causes has been avoided, safety in utilization and bathing comfort have been improved.
As an alternative embodiment, the controller 8 determines the formula of the actual power of the water heater according to the following formula:
Q actual practice is that of ＝C×L×(T1-T2)/η/60；
Wherein Q is Actual practice is that of For practical power, C is the specific heat capacity of water, L is the current impact water flow, T1 is the preset water outlet temperature, T2 is the water inlet temperature, and eta is the overall efficiency.
As an alternative embodiment, the controller 8 is configured to lock the water valve 6 and the water pump 7 if the normal water flow is not greater than the first water flow; if the normal water flow is greater than the first water flow and not greater than the second water flow, the controller 8 is configured to close the water valve 6 after a preset period of time; after the water valve 6 is closed for a preset period of time, the controller 8 is used for simultaneously opening the water pump 7 and the water valve 6; after the water pump 7 and the water valve 6 are started for a preset time, the controller 8 is used for closing the water pump 7, and repeatedly executing the steps of closing the water valve 6 after the preset time until a closing instruction is received; if the normal water flow is greater than the second water flow, the controller 8 is used for closing the water valve 6 after a preset time period; after the water valve 6 is closed for a preset time period, the controller 8 is used for opening the water valve 6, and repeatedly executing the steps of closing the water valve 6 after the preset time period until a closing instruction is received.
As an alternative implementation manner, if the determined actual power of the water heater is greater than the maximum overall power, the controller 8 reduces the outlet water temperature to the target outlet water temperature, and redetermines the current actual power of the water heater according to the current impact water flow, the inlet water temperature, the target outlet water temperature and the preset overall efficiency; and if the redetermined current actual power is smaller than or equal to the maximum overall power, the water heater heats according to the redetermined current actual power. If the re-determined current actual power is greater than the preset overall power, the controller 8 turns off the water pump 7 until the impact bath is over.
As an alternative embodiment, the controller 8 determines the current impingement water flow rate according to the following formula:
L closing valve ＝(7.1×L Normal state -1.8)/13；
L Pump on ＝(9.3×L Normal state +69.6)/13；
Wherein L is Closing valve For the flow rate of the impinging water when the water valve 6 and the water pump 7 are both in the closed state, L Normal state Is normal waterFlow, L Pump on For the flow of impinging water when both the water valve 6 and the water pump 7 are in an open state.
For specific limitations of the water heater, reference may be made to the above limitations of the control method of the water heater, and no further description is given here. The various modules in the water heater described above may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (6)
1. A control method of a water heater is characterized in that the water heater comprises a water valve (6) and a water pump (7) for realizing an impact bath function, and the pressure of water inflow is increased or decreased by controlling the rotating speed of the water pump (7); the change of the water inlet channel is realized by controlling the opening and closing of the water valve (6); when the water valve (6) is in a closed state, a first water inlet channel is formed between a valve body (61) and a valve seat (62) of the water valve (6); when the water valve (6) is in an open state, a second water inlet channel is formed between a valve body (61) of the water valve (6) and the valve seat (62); the control method of the water heater comprises the following steps:
when a starting instruction is received, acquiring normal water flow, water inlet temperature and preset water outlet temperature; the normal water flow is the water flow when the water valve (6) is in an open state and the water pump (7) is in a closed state;
in the process of the impact bath, when the switching state of the water valve (6) or the switching state of the water pump (7) is detected to change, determining the current impact water flow according to the switching state of the water valve (6), the switching state of the water pump (7) and the normal water flow;
Determining the current actual power of the water heater according to the current impact water flow, the water inlet temperature, the preset water outlet temperature and the preset overall efficiency, so that the water heater heats according to the current actual power;
locking the water valve (6) and the water pump (7) if the normal water flow is not greater than a first water flow;
if the normal water flow is larger than the first water flow and not larger than the second water flow, closing the water valve (6) after a preset time period;
after the water valve (6) is closed for a preset period of time, the water pump (7) and the water valve (6) are simultaneously opened;
simultaneously, after the water pump (7) and the water valve (6) are started for a preset time period, the water pump (7) is closed, and the step of closing the water valve (6) after the preset time period is repeatedly executed until a closing instruction is received;
if the normal water flow is greater than the second water flow, closing the water valve (6) after a preset time period;
after the water valve (6) is closed for a preset time period, the water valve (6) is opened, and the step of closing the water valve (6) after the preset time period is repeatedly executed until a closing instruction is received;
the formula for determining the current impact water flow according to the on-off state of the water valve (6), the on-off state of the water pump (7) and the normal water flow is as follows:
L Closing valve =（7.1×L Normal state -1.8）/13；
L Pump on =（9.3×L Normal state +69.6）/13；
Wherein L is Closing valve For the flow rate of the impact water when the water valve (6) and the water pump (7) are in the closed state, L Normal state Is normal water flow, L Pump on The water valve (6) and the water pump (7) are both in an open state.
2. The control method of a water heater according to claim 1, wherein the formula for determining the actual power of the water heater according to the current impinging water flow rate, the inlet water temperature, the preset outlet water temperature and the preset overall efficiency is as follows:
Q actual practice is that of =C× L×（T1-T2）/η/60；
Wherein Q is Actual practice is that of The water heater is characterized in that the water heater is in actual power, the specific heat capacity of water is C, the current impact water flow is L, the preset water outlet temperature is T1, the water inlet temperature is T2, and the overall efficiency is eta.
3. The method for controlling a water heater according to claim 1, further comprising:
if the determined actual power of the water heater is greater than the maximum overall power, reducing the water outlet temperature to a target water outlet temperature, and re-determining the current actual power of the water heater according to the current impact water flow, the water inlet temperature, the target water outlet temperature and the preset overall efficiency;
if the current actual power is less than or equal to the maximum overall power, heating the water heater according to the current actual power;
If the re-determined current actual power is larger than the preset complete machine power, the water pump (7) is turned off until the impact bath is finished.
4. A water heater, characterized by comprising a controller (8), a water valve (6) for realizing the impact bath function and a water pump (7); the pressure of the inflow water flow is increased or reduced by controlling the rotating speed of the water pump (7); the change of the water inlet channel is realized by controlling the opening and closing of the water valve (6); when the water valve (6) is in a closed state, a first water inlet channel is formed between a valve body (61) and a valve seat (62) of the water valve (6); when the water valve (6) is in an open state, a second water inlet channel is formed between a valve body (61) of the water valve (6) and the valve seat (62);
when a starting instruction is received, the controller (8) is used for acquiring normal water flow, water inlet temperature and preset water outlet temperature; the normal water flow is the water flow when the water valve (6) is in an open state and the water pump (7) is in a closed state;
in the process of the impact bath, when the switching state of the water valve (6) or the switching state of the water pump (7) is detected to change, the controller (8) determines the current impact water flow according to the switching state of the water valve (6), the switching state of the water pump (7) and the normal water flow;
The controller (8) determines the current actual power of the water heater according to the current impact water flow, the water inlet temperature, the preset water outlet temperature and the preset overall efficiency, so that the water heater heats according to the current actual power;
if the normal water flow is not greater than the first water flow, the controller (8) is used for locking the water valve (6) and the water pump (7);
if the normal water flow is greater than the first water flow and not greater than the second water flow, the controller (8) is used for closing the water valve (6) after a preset time period;
after closing the water valve (6) for a preset period of time, the controller (8) is used for simultaneously opening the water pump (7) and the water valve (6);
after the water pump (7) and the water valve (6) are started for a preset time, the controller (8) is used for closing the water pump (7) and repeatedly executing the step of closing the water valve (6) after the preset time until a closing instruction is received;
if the normal water flow is greater than the second water flow, the controller (8) is used for closing the water valve (6) after a preset time period;
after closing the water valve (6) for a preset time period, the controller (8) is used for opening the water valve (6) and repeatedly executing the step of closing the water valve (6) after the preset time period until a closing instruction is received;
The controller (8) determines the current impingement water flow rate according to the following formula:
L closing valve =（7.1×L Normal state -1.8）/13；
L Pump on =（9.3×L Normal state +69.6)/13; wherein,,
L closing valve For the flow rate of the impact water when the water valve (6) and the water pump (7) are in the closed state, L Normal state Is normal water flow, L Pump on The water valve (6) and the water pump (7) are both in an open state.
5. A water heater according to claim 4, wherein the controller (8) determines the formula for the actual power of the water heater according to the formula:
Q actual practice is that of =C× L×（T1-T2）/η/60；
Wherein Q is Actual practice is that of For practical power, C is the specific heat capacity of water, L is the current impact water flow, T1 is the preset water outlet temperature, T2 is the water inlet temperature, and eta is the overall efficiency.
6. The water heater of claim 4, wherein the water heater is configured to provide water from the water heater,
if the determined actual power of the water heater is greater than the maximum overall power, the controller (8) reduces the water outlet temperature to the target water outlet temperature, and redetermines the current actual power of the water heater according to the current impact water flow, the water inlet temperature, the target water outlet temperature and the preset overall efficiency;
if the current actual power is less than or equal to the maximum overall power, heating the water heater according to the current actual power;
If the re-determined current actual power is greater than the preset complete machine power, the controller (8) turns off the water pump (7) until the impact bath is over.
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| CN106482353A (en) * | 2016-11-18 | 2017-03-08 | 广东万家乐燃气具有限公司 | A kind of water heater and its surfing mode bathing control method |
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| JP6591816B2 (en) * | 2015-07-30 | 2019-10-16 | 株式会社ガスター | Bath equipment |
| JP6583110B2 (en) * | 2016-04-12 | 2019-10-02 | 三菱電機株式会社 | Hot water system |
| CN109907955B (en) * | 2017-12-12 | 2022-02-22 | 能率(中国)投资有限公司 | Heating stove or water heater with massage module and control method thereof |
| CN110186195B (en) * | 2018-05-22 | 2021-06-08 | 华帝股份有限公司 | Control method and control system of gas water heater |
| CN112577185A (en) * | 2019-09-27 | 2021-03-30 | 博世热力技术（上海）有限公司 | Gas water heater |
| CN110986373A (en) * | 2019-11-18 | 2020-04-10 | 华帝股份有限公司 | Intelligent supercharged gas water heater and control method |
| CN111536695B (en) * | 2019-12-05 | 2022-09-16 | 广东万和新电气股份有限公司 | Water quantity adjusting method, water quantity adjusting device, water heater, terminal and hot water system |
| CN112460810B (en) * | 2020-10-26 | 2022-06-10 | 华帝股份有限公司 | Intelligent pressurization method for gas water heater and gas water heater using intelligent pressurization method |
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| CN105716294A (en) * | 2016-04-11 | 2016-06-29 | 广东万家乐燃气具有限公司 | Instantaneous gas water heater capable of achieving multiple shower functions |
| CN106482353A (en) * | 2016-11-18 | 2017-03-08 | 广东万家乐燃气具有限公司 | A kind of water heater and its surfing mode bathing control method |
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