CN111947297A - Gas water heater, control method and device of gas water heater and storage medium - Google Patents
Gas water heater, control method and device of gas water heater and storage medium Download PDFInfo
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- CN111947297A CN111947297A CN202010827131.2A CN202010827131A CN111947297A CN 111947297 A CN111947297 A CN 111947297A CN 202010827131 A CN202010827131 A CN 202010827131A CN 111947297 A CN111947297 A CN 111947297A
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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
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a gas water heater, a control method and a control device of the gas water heater and a storage medium, wherein a residual water collecting device, a residual water inlet pipe, a residual water exhaust pipe, a first valve arranged on the water inlet pipe of the gas water heater, a second valve arranged on an air inlet pipe of the gas water heater and a fourth valve arranged on the gas inlet pipe of the gas water heater are additionally arranged on the basis of the traditional gas water heater; the residual water collecting device is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with a hot water outlet pipe of the gas water heater; one end of the residual water exhaust pipe is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; and a third valve is also arranged on the residual water inlet pipe. Therefore, when the gas water heater needs to be cleaned later, residual water remained in the pipeline after the gas water heater works can be discharged under the condition that the fan provides power, and the residual water can be reused.
Description
Technical Field
The invention relates to the technical field of electrical equipment, in particular to a gas water heater, a control method and a control device of the gas water heater and a storage medium.
Background
With the development of social economy and the improvement of living standard of people, the gas water heater is favored by consumers due to the advantages of the gas water heater. On the basis of the existing development, the development is rapidly towards intellectualization, miniaturization, multifunction and the like, but the use safety is still the most important.
Anti-freezing is one of the key considerations in the aspect of use safety in the design process of the gas water heater. At present, the common methods in the aspect of anti-freezing treatment are electric auxiliary heating and mechanical anti-freezing, wherein the temperature sensing bulb attached to a water pipe and a ceramic heating rod are used for starting and stopping the heating rod according to a preset temperature value to prevent the water pipe from being frozen and cracked, but the method has the biggest defect of energy consumption, and certain scale can be generated after long-time use, so that the heat exchange performance of the water heater is seriously influenced; after the water is used, the residual water left in the water pipe is manually discharged by means of the water discharge valve, so that the pipeline is prevented from being frozen and cracked in a low-temperature area, the whole process is greatly influenced by subjective factors, and great potential safety hazards exist. On the basis, students and experts also put forward some improvement measures in the follow-up process, but the antifreezing effect has certain limitation.
Disclosure of Invention
In view of this, embodiments of the present invention provide a gas water heater, a control method and device for the gas water heater, and a storage medium, so as to solve the problem of frost cracking of a pipeline of the gas water heater.
According to a first aspect, an embodiment of the present invention provides a gas water heater, including:
a residual water collecting device 17 including a residual water inlet and a residual water outlet;
one end of the residual water inlet pipe 12 is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with the hot water outlet pipe 8 of the gas water heater;
one end of the residual water exhaust pipe 13 is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater;
the first valve 2 is arranged on the water inlet pipe 1 of the gas water heater;
a second valve 15 provided on an air intake pipe 16 of the gas water heater;
a third valve 14 arranged on the residual water inlet pipe 12;
and the fourth valve 10 is arranged on a gas inlet pipe 9 of the gas water heater.
The embodiment of the invention is additionally provided with a residual water collecting device 17, a residual water inlet pipe 12, a residual water exhaust pipe 13, a first valve 2 arranged on a water inlet pipe 1 of the gas water heater, a second valve 15 arranged on an air inlet pipe 16 of the gas water heater and a fourth valve 10 arranged on a gas inlet pipe 9 of the gas water heater on the basis of the conventional gas water heater; the residual water collecting device 17 is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe 12 is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with the hot water outlet pipe 8 of the gas water heater; one end of the residual water exhaust pipe 13 is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; a third valve 14 is also arranged on the residual water inlet pipe 12. Therefore, when the gas water heater needs to be cleaned later, the residual water remained in the pipeline after the gas water heater works can be discharged under the condition that the fan provides power, and compared with the condition that the residual water remained in the pipeline is completely driven by the pressure difference between the inside of the pipeline and the atmospheric pressure, the residual water remained in the pipeline can be discharged more cleanly.
With reference to the first aspect, in the first embodiment of the first aspect, the second valve 15 is further provided on the residual water exhaust pipe 13.
With reference to the first aspect, in a second embodiment of the first aspect, the gas water heater further includes:
and the water flow monitoring device 11 is arranged on the residual water inlet pipe 12.
With reference to the first aspect, in a third embodiment of the first aspect, the gas water heater further includes:
the residual water outlet is arranged on the residual water collecting device 17;
and one end of the residual water outlet pipe 19 is communicated with the residual water outlet.
With reference to the third embodiment of the first aspect, in the fourth embodiment of the first aspect, the gas water heater further includes:
and the fifth valve 18 is arranged on the residual water outlet pipe 19, and the other end of the residual water outlet pipe 19 is communicated with the water inlet pipe 1.
With reference to the fourth embodiment of the first aspect, in the fifth embodiment of the first aspect, the gas water heater further includes:
a pressurizing device 20 arranged between the first valve 2 and the fifth valve 18.
With reference to the fourth embodiment of the first aspect, in the sixth embodiment of the first aspect, the gas water heater further includes:
a tap water inlet communicated with the water inlet pipe 1;
a sixth valve 21 arranged on the inlet conduit 1 upstream of the fifth valve 18.
With reference to the first aspect, in a seventh embodiment of the first aspect, the gas water heater further includes:
and the insulating layer covers the outer side of the residual water collecting device 17 and/or the residual water inlet pipe 12.
With reference to the first aspect, in the eighth embodiment of the first aspect, the residual water inlet and the residual water exhaust port are disposed at the top of the residual water collecting device 17; and/or the residual water outlet is arranged at the bottom of the residual water collecting device 17.
With reference to the first aspect, in a ninth embodiment of the first aspect, the gas water heater further includes: the temperature measuring device 3, the temperature measuring device 3 sets up on inlet tube 1.
According to a second aspect, the embodiment of the present invention provides a control method for a gas water heater, which is applied to a gas water heater, where the gas water heater includes a residual water collecting device 17, a residual water inlet pipe 12, a residual water exhaust pipe 13, a first valve 2 disposed on the gas water heater inlet pipe 1, a second valve 15 disposed on the gas water heater air inlet pipe 16, and a fourth valve 10 disposed on the gas water heater gas inlet pipe 9; the residual water collecting device 17 is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe 12 is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with the hot water outlet pipe 8 of the gas water heater; one end of the residual water exhaust pipe 13 is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; the residual water inlet pipe 12 is also provided with a third valve 14, and the control method of the gas water heater comprises the following steps:
when a post-cleaning instruction is received, determining the type of post-cleaning;
when cleaning after needs are prevented from freezing, a first control instruction for cutting off the water inlet pipe 1 is generated and sent to the first valve 2, a second control instruction for cutting off the gas inlet pipe 9 is generated and sent to the fourth valve 10, a third control instruction for cutting off the air inlet pipe 16 is generated and sent to the second valve 15, a fourth control instruction for opening the residual water inlet pipe 12 is generated and sent to the third valve 14, and the fan of the gas water heater is started.
The embodiment of the invention is additionally provided with a residual water collecting device 17, a residual water inlet pipe 12, a residual water exhaust pipe 13, a first valve 2 arranged on a water inlet pipe 1 of the gas water heater, a second valve 15 arranged on an air inlet pipe 16 of the gas water heater and a fourth valve 10 arranged on a gas inlet pipe 9 of the gas water heater on the basis of the conventional gas water heater; the residual water collecting device 17 is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe 12 is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with the hot water outlet pipe 8 of the gas water heater; one end of the residual water exhaust pipe 13 is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; a third valve 14 is also arranged on the residual water inlet pipe 12. Therefore, when the gas water heater needs to be cleaned later, residual water remained in the pipeline after the gas water heater works can be discharged under the condition that the fan provides power, the automation degree is high and the water safety is guaranteed to a certain extent in the whole process under the control of the main controller, and compared with the method that the residual water remained in the pipeline is completely discharged by taking the pressure difference between the inside of the pipeline and the atmospheric pressure as the power, the method and the device can discharge the residual water remained in the pipeline more cleanly.
With reference to the second aspect, in the first embodiment of the second aspect, when the second valve 15 is further provided on the residual water exhaust pipe 13, and when a third control command to shut off the air intake pipe 16 is generated and sent to the second valve 15, the method further includes: a fifth control command to open the residual water exhaust pipe 13 is generated and sent to the second valve 15.
With reference to the second aspect, in a first embodiment of the second aspect, the determining the type of post-sweep includes:
acquiring the temperature of inlet water;
judging whether the inlet water temperature is less than a preset first threshold value or not;
and when the inlet water temperature is smaller than the first threshold value, judging that the type of the post-cleaning is the anti-freezing post-cleaning.
With reference to the first embodiment of the second aspect, in the second embodiment of the second aspect, the control method of the gas water heater further includes:
and when the water inlet temperature is greater than or equal to the first threshold value, judging that the type of post-cleaning is common post-cleaning.
With reference to the second aspect, in the third embodiment of the second aspect, when the gas water heater further includes the water flow rate monitoring device 11 disposed on the residual water inlet pipe 12, after the second valve 15, the first valve 2, and the fourth valve 10 are closed, the third valve 14 is opened, and the fan of the gas water heater is started, the method further includes:
acquiring the water flow monitored by the water flow monitoring device 11;
and when the water flow is smaller than a preset second threshold value, the fan is turned off.
With reference to the second aspect, in a fourth embodiment of the second aspect, the gas water heater further includes a residual water outlet pipe 19, the residual water outlet pipe 19 is communicated with a residual water outlet on the residual water collecting device 17, a fifth valve 18 is disposed on the residual water outlet pipe 19, and a pressurizing device 20 is disposed between the fifth valve 18 and the first valve 2; a sixth valve 21 is further disposed on the water inlet pipe 1 and located upstream of the fifth valve 18, and the control method of the gas water heater further includes:
when a water use command is received, the fifth valve 18 and the first valve 2 are opened, and the pressurizing device 20 is started;
acquiring the running time of the pressurizing device 20;
when the running time reaches a preset third threshold value, the sixth valve 21 is opened.
The control method of the gas water heater provided by the fourth embodiment of the second aspect of the invention can be used for reheating the stored water in the residual water tank under the control of the main controller, and has certain energy-saving effect.
With reference to the fourth embodiment of the second aspect, in the fifth embodiment of the second aspect, when the operation time reaches a preset third threshold, the method further includes:
obtaining the feedback water pressure of the water inlet pipe 1;
judging whether the feedback water pressure is greater than or equal to the actual demand water pressure;
closing the pressurizing device 20 when the feedback water pressure is equal to or greater than the actual demand water pressure;
when the feedback water pressure is smaller than the actual demand water pressure, a difference between the actual demand water pressure and the feedback water pressure is calculated, and the operating parameter of the pressurizing device 20 is determined using the difference.
With reference to the fourth embodiment of the second aspect, in the sixth embodiment of the second aspect, the third threshold is determined according to the water temperature or the water flow speed in the water inlet pipe 1.
According to a third aspect, the embodiment of the present invention provides a control device for a gas water heater, which is applied to a gas water heater, and the gas water heater includes a residual water collecting device 17, a residual water inlet pipe 12, a residual water exhaust pipe 13, a first valve 2 disposed on the gas water heater inlet pipe 1, a second valve 15 disposed on the gas water heater air inlet pipe 16, and a fourth valve 10 disposed on the gas water heater gas inlet pipe 9; the residual water collecting device 17 is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe 12 is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with the hot water outlet pipe 8 of the gas water heater; one end of the residual water exhaust pipe 13 is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; still be equipped with third valve 14 on surplus water inlet tube 12, gas heater's controlling means includes:
the post-cleaning type determining module is used for determining the type of post-cleaning when receiving a post-cleaning instruction;
back clearance module, when need prevent frostbite after cleaning, the production is cut off inlet tube 1's first control command and send to first valve 2, production are cut off gas intake pipe 9's second control command and send to fourth valve 10, production are cut off air intake pipe 16's third control command and send to second valve 15, production are opened the fourth control command of surplus water inlet tube 12 and send to third valve 14, and start gas heater's fan.
With reference to the third aspect, in the first embodiment of the third aspect, the gas water heater further includes a residual water outlet pipe 19, the residual water outlet pipe 19 is communicated with a residual water outlet on the residual water collecting device 17, a fifth valve 18 is disposed on the residual water outlet pipe 19, and a pressurizing device 20 is disposed between the fifth valve 18 and the first valve 2; on inlet tube 1, be located the upper reaches of fifth valve 18 and still be equipped with sixth valve 21, gas heater's controlling means still includes:
a first starting module, when receiving a water use command, for opening the fifth valve 18 and the first valve 2, and starting the pressurizing device 20;
an acquisition module for acquiring the operating time of the pressurization device 20;
the judging module is used for judging whether the running time is greater than a preset third threshold value or not;
a second enabling module for opening the sixth valve 21 when the running time reaches the third threshold.
With reference to the first embodiment of the third aspect, in a second embodiment of the third aspect, the processing module is further configured to:
the processing module is used for acquiring the feedback water pressure of the water inlet pipe 1 when the running time reaches a preset third threshold value; judging whether the feedback water pressure is greater than or equal to the actual demand water pressure; closing the pressurizing device 20 when the feedback water pressure is equal to or greater than the actual demand water pressure; when the feedback water pressure is smaller than the actual demand water pressure, a difference between the actual demand water pressure and the feedback water pressure is calculated, and the operating parameter of the pressurizing device 20 is determined using the difference.
According to a fourth aspect, the embodiment of the present invention provides a gas water heater, which includes a memory and a processor, the memory and the processor are communicatively connected with each other, the memory stores computer instructions, and the processor executes the computer instructions to execute the control method of the gas water heater according to the second aspect or any one implementation manner of the second aspect.
According to a fifth aspect, the embodiment of the present invention provides a computer-readable storage medium, which stores computer instructions for causing a computer to execute the control method of the gas water heater described in the second aspect or any one of the implementation manners of the second aspect.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
fig. 1 is a schematic structural view of an example of a gas water heater according to embodiment 1 of the present invention;
FIG. 2 is a schematic flow chart of a control method of a gas water heater according to embodiment 2 of the present invention;
FIG. 3 is a schematic flow chart of an example of a gas water heater control method according to embodiment 2 of the present invention;
FIG. 4 is a schematic flow chart of a control method of a gas water heater according to embodiment 3 of the present invention;
FIG. 5 is a schematic flow chart of an example of a gas water heater control method according to embodiment 3 of the present invention;
FIG. 6 is a schematic structural diagram of a control device of a gas water heater according to embodiment 4 of the present invention;
fig. 7 is a schematic structural diagram of a gas water heater control device according to embodiment 5 of the present invention;
wherein, 1, a water inlet pipe; 2. a first valve; 3. a temperature measuring device; 4. a gas water heater body; 5. a direct current variable frequency fan; 6. a finned heat exchanger; 7. a master controller; 8. a hot water outlet pipe; 9. a gas inlet pipe; 10. a fourth valve; 11. a water flow monitoring device; 12. a residual water inlet pipe; 13. residual water exhaust pipe; 14. a third valve; 15. a second valve; 16. an air inlet pipe; 17. a residual water collecting device; 18. a fifth valve; 19. a residual water outlet pipe; 20. a pressurizing device; 21. a sixth valve; 22. a tap water inlet pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, embodiment 1 of the present invention provides a gas water heater, wherein a gas water heater body 4 includes a residual water collecting device 17, a residual water inlet pipe 12, a residual water exhaust pipe 13, a first valve 2, a second valve 15, a third valve 14, and a fourth valve 10.
Specifically, the residual water collecting device 17 includes a residual water inlet and a residual water outlet;
one end of the residual water inlet pipe 12 is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with the hot water outlet pipe 8 of the gas water heater;
one end of the residual water exhaust pipe 13 is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater;
the first valve 2 is arranged on the water inlet pipe 1 of the gas water heater;
a second valve 15 provided on an air intake pipe 16 of the gas water heater;
a third valve 14 arranged on the residual water inlet pipe 12;
and the fourth valve 10 is arranged on a gas inlet pipe 9 of the gas water heater.
As a further embodiment, the second valve 15 is also provided on the residual water exhaust pipe 13. Specifically, the second valve 15 may be a two-position three-way valve.
Specifically, the residual water inlet and the residual water exhaust port are provided at the top of the residual water collecting device 17.
In embodiment 1 of the invention, a first valve 2 is additionally arranged on a water inlet pipe 1 on the basis of the structure of a common gas water heater, and the first valve is mainly used for controlling water flow in the process of collecting and reusing residual water in a pipeline.
In the embodiment 1 of the invention, the direct-current variable-frequency fan 5 is adopted, so that on one hand, the direct-current variable-frequency fan is the same as a gas water heater on the market and is used for ensuring air required by normal combustion of the water heater; on the other hand, the method is applied to the residual water collecting process to provide power for the residual water collecting process.
In embodiment 1 of the present invention, the third valve 14 mainly prevents the hot water in the hot water outlet pipe 8 from entering the residual water collecting tank when the water supply is suddenly stopped during the water supply process, so that the user feels the reduction of the water quality.
As a specific implementation manner, a two-position three-way electromagnetic valve is arranged at the junction of the exhaust pipe of the residual water tank and the air inlet pipe 16 in example 1 of the present invention, mainly for automatically switching different post-cleaning modes.
The embodiment of the invention is additionally provided with a residual water collecting device 17, a residual water inlet pipe 12, a residual water exhaust pipe 13, a first valve 2 arranged on a water inlet pipe 1 of the gas water heater, a second valve 15 arranged on an air inlet pipe 16 of the gas water heater and a fourth valve 10 arranged on a gas inlet pipe 9 of the gas water heater on the basis of the conventional gas water heater; the residual water collecting device 17 is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe 12 is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with the hot water outlet pipe 8 of the gas water heater; one end of the residual water exhaust pipe 13 is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; a third valve 14 is also arranged on the residual water inlet pipe 12. Therefore, when the gas water heater needs to be cleaned later, the residual water remained in the pipeline after the gas water heater works can be discharged under the condition that the fan provides power, and compared with the condition that the residual water remained in the pipeline is completely driven by the pressure difference between the inside of the pipeline and the atmospheric pressure, the residual water remained in the pipeline can be discharged more cleanly.
As a further embodiment, the gas water heater further comprises a water flow monitoring device 11 disposed on the residual water inlet pipe 12. The water flow sensor determines the fan off time mainly by monitoring the water flow in the residual water inlet pipe 12.
As a further embodiment, the gas water heater further comprises a residual water outlet arranged on the residual water collecting device 17, and a residual water outlet pipe 19 communicated with the residual water outlet. Whereby the residual water collected by the residual water collecting means 17 can be discharged out of the residual water collecting means 17. Specifically, the residual water outlet may be disposed at the bottom of the residual water collecting device 17.
As a further implementation mode, the gas water heater further includes a fifth valve 18, the fifth valve 18 is disposed on the residual water outlet pipe 19, and the other end of the residual water outlet pipe 19 is communicated with the water inlet pipe 1. Therefore, the residual water collected by the residual water collecting device 17 can be discharged into the water inlet pipe 1, and the residual water can be recycled. Furthermore, the fifth valve 18 is a check valve, and its main function is to prevent that the water in the inlet tube 1 from entering the surplus water tank during the water use process, and the water flow entering the water heater to participate in the heat exchange reduces, influences the use experience, and even has certain potential safety hazard.
As a further embodiment, the gas water heater further comprises a pressurizing device 20 (e.g. a pressurizing pump), said pressurizing device 20 being arranged between said first valve 2 and said fifth valve 18. Thereby, the residual water collected in the residual water collecting device 17 is completely discharged to the water inlet pipe 1 by the pressurization of the pressurizing device 20.
As a further embodiment, the gas water heater further comprises a tap water inlet and a sixth valve 21. The running water inlet with inlet tube 1 intercommunication, sixth valve 21 sets up on the inlet tube 1 and be located the upper reaches of fifth valve 18. Therefore, in the process of using water, the tap water inlet pipe 22 can be used for supplying water for the gas water heater after the residual water in the residual water collecting device 17 is discharged.
As a further embodiment, the gas water heater further comprises an insulating layer covering the outer side of the residual water collecting device 17 and/or the residual water inlet pipe 12.
As a specific implementation manner, in the invention example 1, the high-temperature flue gas carries out heat convection with water in the pipeline through the fin heat exchanger 6.
In a specific embodiment, a temperature measuring device 3 (e.g., a bulb) is further provided on the water inlet pipe 1, and the temperature of the inlet water is detected by the temperature measuring device 3 to determine whether the normal post-cleaning mode or the anti-freeze post-cleaning mode is to be performed.
Example 2
The embodiment 2 of the invention provides a control method of a gas water heater, which is applied to the gas water heater, wherein the gas water heater comprises a residual water collecting device 17, a residual water inlet pipe 12, a residual water exhaust pipe 13, a first valve 2 arranged on the gas water heater inlet pipe 1, a second valve 15 arranged on the gas water heater air inlet pipe 16 and a fourth valve 10 arranged on the gas water heater gas inlet pipe 9; the residual water collecting device 17 is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe 12 is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with the hot water outlet pipe 8 of the gas water heater; one end of the residual water exhaust pipe 13 is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; a third valve 14 is also arranged on the residual water inlet pipe 12. As shown in fig. 2, the control method of the gas water heater according to embodiment 2 of the present invention includes the steps of:
s201: when a post-cleaning instruction is received, the type of post-cleaning is determined.
As a specific embodiment, the post-cleaning command is generally received when the water use is finished.
As a specific implementation, the following technical solution may be adopted for determining the type of post-cleaning: acquiring the temperature of inlet water; judging whether the inlet water temperature is less than a preset first threshold value or not; when the water inlet temperature is lower than the first threshold value, judging that the type of the post-cleaning is anti-freezing post-cleaning; and when the water temperature is greater than or equal to the threshold value, determining that the type of post-cleaning is normal post-cleaning.
That is to say, whether to enter the anti-freezing cleaning mode is mainly determined by the water temperature of the inlet water, after the user finishes using the water, the temperature sensing bulb on the inlet water pipe detects the water temperature of the inlet water in real time, and when T is reachedInflow water≥TPreset ofEntering a normal post-cleaning stage when TInflow water≤TPreset ofAnd automatically entering an anti-freezing post-cleaning stage, wherein the ordinary post-cleaning means that: after the user finishes using water, in order to get rid of the outdoor process with remaining gas and flue gas in the combustion chamber, mainly prevent that the detonation phenomenon appears in the process of next water ignition, perhaps leak indoor, produce the influence to user's safety. The duration of the ordinary post-cleaning stage is generally about 20S; the cleaning duration after freeze protection is generally 20S to 30S.
S202: when need to clean after preventing frostbite, the production is cut off the first control command of inlet tube and is sent to first valve 2, production are cut off the second control command of gas intake pipe and send to fourth valve 10, production are cut off the third control command of air intake pipe and send to second valve 15, production are opened the fourth control command of surplus water inlet tube and send to third valve 14, and start gas heater's fan.
From this can get into and clean the mode after preventing frostbite, the fan starts under the control of master controller, and atmospheric pressure in the surplus water tank this moment presents the negative pressure state, and water in the pipeline is forced to get into the surplus water tank and remedies the disappearance of atmospheric pressure volume, when installing the flow sensor on surplus water tank inlet tube and detecting this department's anhydrous flow signal, under the control of master controller, fan stall, whole pipeline water storage collection process is accomplished.
As a specific embodiment, when the second valve 15 is further provided on the residual water exhaust pipe, when a third control command for shutting off the air intake pipe is generated and sent to the second valve 15, the method further includes: a fifth control command to open the residual water exhaust pipe is generated and sent to the second valve 15. When the second valve 15 is a two-position three-way valve, the air inlet pipe is cut off and the residual water exhaust pipe is opened by rotating the valve core in the two-position three-way valve, so that no air enters and the residual water collecting device is communicated with the combustion chamber.
On the basis of the ignition time of a gas water heater in the market, the ignition time of the water heater is delayed by 2S, and the ignition time is set to be mainly used for preventing dry burning.
The embodiment of the invention is additionally provided with a residual water collecting device 17, a residual water inlet pipe 12, a residual water exhaust pipe 13, a first valve 2 arranged on a water inlet pipe 1 of the gas water heater, a second valve 15 arranged on an air inlet pipe 16 of the gas water heater and a fourth valve 10 arranged on a gas inlet pipe 9 of the gas water heater on the basis of the conventional gas water heater; the residual water collecting device 17 is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe 12 is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with the hot water outlet pipe 8 of the gas water heater; one end of the residual water exhaust pipe 13 is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; a third valve 14 is also arranged on the residual water inlet pipe 12. Therefore, when the gas water heater needs to be cleaned later, residual water remained in the pipeline after the gas water heater works can be discharged under the condition that the fan provides power, the automation degree is high and the water safety is guaranteed to a certain extent in the whole process under the control of the main controller, and compared with the method that the residual water remained in the pipeline is completely discharged by taking the pressure difference between the inside of the pipeline and the atmospheric pressure as the power, the method and the device can discharge the residual water remained in the pipeline more cleanly.
As a further embodiment, when the gas water heater further includes a water flow rate monitoring device 11 disposed on the residual water inlet pipe 12, after closing the second valve 15, the first valve 2 and the fourth valve 10, opening the third valve 14, and starting the fan of the gas water heater, the method further includes: acquiring the water flow monitored by the water flow monitoring device 11; and when the water flow is smaller than a preset second threshold value, the fan is turned off. Therefore, the water flow flowing into the water tank can be monitored in real time, when no water flow signal exists, the fan stops, and the cleaning mode is finished after freezing prevention.
In order to explain the control method of the gas water heater of embodiment 1 of the present invention in more detail, a specific example of the control method of the gas water heater is provided in conjunction with the gas water heater of embodiment 1 of the present invention. As shown in figure 3, the cleaning mode after entering the freeze-proof mode is mainly determined by the temperature of the inlet water, after the user finishes using the water, the temperature sensing bulb (3) on the inlet water pipe detects the temperature of the inlet water in real time, and when T is reachedInflow water≥TPreset ofEntering a common post-cleaning stage, wherein the duration is about 20S generally; when T isInflow water≤TPreset ofAnd automatically entering a cleaning stage after freezing prevention, wherein the set time of the process is set to be 20-30S. Meanwhile, under the control of the main controller (7), the two-position three-way valve (15) acts to enable the residual water collecting water tank to be communicated with the combustion chamber, the electromagnetic valve (2) on the cold water inlet pipe is closed, the electromagnetic valve (10) is closed, and the electromagnetic valve (14) is opened. Therefore, the direct-current variable-frequency fan is started according to a certain rotating speed, the combustion chamber is connected with the whole space of the water tank to form negative pressure, residual water in the pipeline flows into the residual water collecting water tank, and the water flow sensor arranged on the water inlet pipe of the water tank monitors the water flow flowing into the water tank in real timeAnd feeding back a signal to the main controller, stopping the fan when no water flow signal exists, and ending the cleaning mode after freezing prevention. It is worth noting that the residual water tank and the external pipeline connected with the residual water tank are provided with heat insulation layers, and the opening and closing of the electromagnetic valve (14) arranged on the residual water inlet pipe are controlled by the water using state, and the water using process is closed; when water consumption is finished and the pipeline residual water collecting process is carried out, the main controller (7) controls the pipeline residual water collecting device to be opened. T isInflow water、TPreset ofRespectively referring to the inlet water temperature and the preset temperature.
Example 3
The embodiment 3 of the invention provides a control method of a gas water heater, which is applied to the gas water heater, wherein the gas water heater comprises a residual water collecting device 17, a residual water inlet pipe 12, a residual water exhaust pipe 13, a first valve 2 arranged on the gas water heater inlet pipe 1, a second valve 15 arranged on the gas water heater air inlet pipe 16 and a fourth valve 10 arranged on the gas water heater gas inlet pipe 9; the residual water collecting device 17 is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe 12 is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with the hot water outlet pipe 8 of the gas water heater; one end of the residual water exhaust pipe 13 is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; a third valve 14 is also arranged on the residual water inlet pipe 12; the gas water heater also comprises a residual water outlet pipe 19, the residual water outlet pipe 19 is communicated with a residual water outlet on the residual water collecting device 17, a fifth valve 18 is arranged on the residual water outlet pipe 19, and a pressurizing device 20 is arranged between the fifth valve 18 and the first valve 2; a sixth valve 21 is also arranged on the water inlet pipe 1 upstream of the fifth valve 18. As shown in fig. 4, the control method of the gas water heater according to embodiment 3 of the present invention includes the steps of:
s301: when a water use command is received, the fifth valve 18 and the first valve 2 are opened and the pressurizing means 20 is activated. Thereby, the residual water collected in the residual water collecting device 17 is completely discharged to the water inlet pipe by the pressurizing of the pressurizing device 20.
S302: the operating time of the pressurizing means is acquired.
In embodiment 3 of the present invention, the operation time of the pressurizing device can be obtained by any method in the prior art, and is not described herein again.
S303: when the operating time reaches a preset third threshold value, the sixth valve 21 is opened.
As a specific embodiment, the third threshold is determined according to the water temperature or the water flow rate in the inlet pipe.
Specifically, for the gas water heater, the outlet water temperature and the water flow rate are set by the user according to needs, once the outlet water temperature and the water flow rate are determined, the main controller calculates the time taken for emptying the water in the residual water tank (because the amount of residual water in the collecting pipeline in the water tank is not changed every time), namely the time for operating the pressure pump, according to the relationship between the water capacity and the water flow rate set in advance, and corresponds to the third threshold value in the text. Therefore, the water flow of the pipeline in the water using process can be directly written.
As a further embodiment, when the operation time reaches a preset third threshold, the method further includes: acquiring the feedback water pressure of the water inlet pipe; judging whether the feedback water pressure is greater than or equal to the actual demand water pressure; closing the pressurizing device when the feedback water pressure is greater than or equal to the actual demand water pressure; and when the feedback water pressure is smaller than the actual demand water pressure, calculating a difference value between the actual demand water pressure and the feedback water pressure, and determining the operation parameters of the pressurizing device by using the difference value. Therefore, the water demand of the user can be met.
In order to explain the control method of the gas water heater of embodiment 2 of the present invention in more detail, a specific example of the control method of the gas water heater is provided in conjunction with the gas water heater of embodiment 2 of the present invention. As shown in fig. 5, the water inlet control process is mainly divided into two cases, namely, a case where the water pressure meets the water demand and a case where the water pressure is insufficient, as follows.
1. When the water pressure in the cold water pipeline meets the use requirements of users, after the main controller receives a water use command, the two-position three-way valve (15) acts, the combustion chamber is communicated with the air inlet pipe (16), the electromagnetic valve (2) on the water inlet pipeline is simultaneously opened, and the pressure pump (20) is started according to the rotating speed set by the users; on the basis of the ignition time of a gas water heater in the market, the ignition time of the water heater is delayed by 2S, and the ignition time is set to be mainly used for preventing dry burning. From the time when the booster pump (20) starts to work, the timer starts to count time, and feeds back the result to the main controller (7), if the actual running time of the booster pump (20) reaches the preset time, the booster pump (20) is closed, the electromagnetic valve (21) is opened instantly, and tap water in the municipal pipeline enters the gas water heater to be heated and conveyed to a water consumption point until the water consumption is finished. The preset time for stopping the booster pump is set according to the water flow speed of water in the pipeline, is not a fixed value and is related to the water consumption requirement of a user, and the whole process is automatically adjusted.
2. When the water pressure provided by the municipal pipe network does not meet the water use requirement of a user, the beginning stage of water use is the same as that in the state 1, and the rest water in the water tank (17) is treated firstly; the difference lies in that the pressure pump is not closed after the running time of the pressure pump reaches the preset time, and the pressure pump rotates under the control of the main controller according to the difference between the actual required water pressure and the pipeline feedback water pressure until the water use is finished.
Example 4
Corresponding to embodiment 2 of the present invention, embodiment 4 of the present invention provides a control device for a gas water heater, which is applied to a gas water heater, and the gas water heater includes a residual water collecting device 17, a residual water inlet pipe 12, a residual water exhaust pipe 13, a first valve 2 arranged on the gas water heater inlet pipe 1, a second valve 15 arranged on the gas water heater air inlet pipe 16, and a fourth valve 10 arranged on the gas water heater gas inlet pipe 9; the residual water collecting device 17 is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe 12 is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with the hot water outlet pipe 8 of the gas water heater; one end of the residual water exhaust pipe 13 is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; a third valve 14 is also arranged on the residual water inlet pipe 12. Specifically, as shown in fig. 6, the control apparatus of the gas water heater includes a post-cleaning type determination module 40 and a post-cleaning module 42.
Specifically, the post-cleaning type determining module 40 is configured to determine the type of post-cleaning when receiving the post-cleaning command;
the rear cleaning module 42 is used for generating a first control instruction for cutting off the water inlet pipe and sending the first control instruction to the first valve 2, generating a second control instruction for cutting off the gas inlet pipe and sending the second control instruction to the fourth valve 10, generating a third control instruction for cutting off the air inlet pipe and sending the third control instruction to the second valve 15, generating a fourth control instruction for opening the residual water inlet pipe and sending the fourth control instruction to the third valve 14, and starting the fan of the gas water heater when cleaning after freezing prevention is needed; namely, the second valve 15, the first valve 2 and the fourth valve 10 are closed, the third valve 14 is opened, and the fan of the gas water heater is started.
The details of the gas water heater control device can be understood by referring to the corresponding descriptions and effects in the embodiments shown in fig. 1 to 3, which are not repeated herein
Example 5
Corresponding to embodiment 3 of the present invention, embodiment 5 of the present invention provides a control device for a gas water heater, which is applied to a gas water heater, and the gas water heater includes a residual water collecting device 17, a residual water inlet pipe 12, a residual water exhaust pipe 13, a first valve 2 disposed on the gas water heater inlet pipe 1, a second valve 15 disposed on the gas water heater air inlet pipe 16, and a fourth valve 10 disposed on the gas water heater gas inlet pipe 9; the residual water collecting device 17 is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe 12 is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with the hot water outlet pipe 8 of the gas water heater; one end of the residual water exhaust pipe 13 is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; a third valve 14 is also arranged on the residual water inlet pipe 12; the gas water heater also comprises a residual water outlet pipe 19, the residual water outlet pipe 19 is communicated with a residual water outlet on the residual water collecting device 17, a fifth valve 18 is arranged on the residual water outlet pipe 19, and a pressurizing device 20 is arranged between the fifth valve 18 and the first valve 2; a sixth valve 21 is also arranged on the water inlet pipe 1 upstream of the fifth valve 18. As shown in fig. 7, the control device of a gas water heater according to embodiment 5 of the present invention includes a first starting module 50, an obtaining module 52, a judging module 54, and a second starting module 56.
Specifically, the first starting module 50 is configured to, when receiving a water use instruction, open the fifth valve 18 and the first valve 2, and start the pressurizing device 20;
an acquisition module 52 for acquiring the operating time of the pressurization device 20;
a judging module 54, configured to judge whether the running time is greater than a preset third threshold;
a second enabling module 56 opens the sixth valve 21 when the runtime reaches the third threshold.
As a further embodiment, the control device of the gas water heater further comprises a processing module 58. The processing module 58 is configured to obtain the feedback water pressure of the water inlet pipe when the operation time reaches a preset third threshold; judging whether the feedback water pressure is greater than or equal to the actual demand water pressure; closing the pressurizing device 20 when the feedback water pressure is equal to or greater than the actual demand water pressure; and when the feedback water pressure is smaller than the actual demand water pressure, calculating a difference value between the actual demand water pressure and the feedback water pressure, and determining the operation parameters of the pressurizing device by using the difference value.
The details of the gas water heater control device can be understood by referring to the corresponding descriptions and effects in the embodiments shown in fig. 1 to 5, which are not repeated herein.
Example 6
Embodiments of the present invention also provide a gas water heater, which may include a processor and a memory, wherein the processor and the memory may be connected by a bus or other means.
The processor may be a Central Processing Unit (CPU). The Processor may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or a combination thereof.
The memory, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules corresponding to the control method of the gas water heater in the embodiments of the present invention (e.g., the post-cleaning type determination module 40 and the post-cleaning module 42 shown in fig. 6, and/or the first activation module 50, the acquisition module 52, the second activation module 54, and the processing module 56 shown in fig. 7). The processor executes various functional applications and data processing of the processor by running the non-transitory software programs, instructions and modules stored in the memory, namely, the control method of the gas water heater in the above method embodiment is realized.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor, and the like. Further, the memory may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory optionally includes memory located remotely from the processor, and such remote memory may be coupled to the processor via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory and, when executed by the processor, perform a method of controlling a gas water heater as in the embodiment of fig. 1-5.
The details of the gas water heater can be understood by referring to the corresponding descriptions and effects of the embodiment shown in fig. 1 to 5, and are not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (23)
1. A gas water heater, comprising:
a residual water collecting device (17) which comprises a residual water inlet and a residual water exhaust port;
one end of the residual water inlet pipe (12) is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with a hot water outlet pipe (8) of the gas water heater;
one end of the residual water exhaust pipe (13) is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater;
the first valve (2) is arranged on a water inlet pipe (1) of the gas water heater;
the second valve (15) is arranged on an air inlet pipe (16) of the gas water heater;
the third valve (14) is arranged on the residual water inlet pipe (12);
and the fourth valve (10) is arranged on a gas inlet pipe (9) of the gas water heater.
2. Gas water heater according to claim 1, characterized in that said second valve (15) is also arranged on said residual water exhaust pipe (13).
3. The gas water heater of claim 1, further comprising:
and the water flow monitoring device (11) is arranged on the residual water inlet pipe (12).
4. The gas water heater of claim 1, further comprising:
the residual water outlet is arranged on the residual water collecting device (17);
and one end of the residual water outlet pipe (19) is communicated with the residual water outlet.
5. The gas water heater of claim 4, further comprising:
and the fifth valve (18) is arranged on the residual water outlet pipe (19), and the other end of the residual water outlet pipe (19) is communicated with the water inlet pipe (1).
6. The gas water heater of claim 5, further comprising:
-a pressurizing device (20) arranged between the first valve (2) and the fifth valve (18).
7. The gas water heater of claim 5, further comprising:
the tap water inlet is communicated with the water inlet pipe (1);
and the sixth valve (21) is arranged on the water inlet pipe (1) and is positioned at the upstream of the fifth valve (18).
8. The gas water heater of claim 1, further comprising:
and the heat insulation layer covers the outer side of the residual water collecting device (17) and/or the residual water inlet pipe (12).
9. The gas water heater of claim 1, wherein:
the residual water inlet and the residual water exhaust port are arranged at the top of the residual water collecting device (17);
and/or the residual water outlet is arranged at the bottom of the residual water collecting device (17).
10. The gas water heater of claim 1, further comprising:
the temperature measuring device (3), temperature measuring device (3) sets up on inlet tube (1).
11. A control method of a gas water heater is applied to the gas water heater, and the gas water heater comprises a residual water collecting device (17), a residual water inlet pipe (12), a residual water exhaust pipe (13), a first valve (2) arranged on the gas water heater inlet pipe (1), a second valve (15) arranged on the gas water heater air inlet pipe (16) and a fourth valve (10) arranged on the gas water heater gas inlet pipe (9); the residual water collecting device (17) is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe (12) is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with a hot water outlet pipe (8) of the gas water heater; one end of the residual water exhaust pipe (13) is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; still be equipped with third valve (14) on surplus water inlet tube (12), its characterized in that includes:
when a post-cleaning instruction is received, determining the type of post-cleaning;
when need to clean after preventing frostbite, the production is cut off the first control command of inlet tube (1) and send to first valve (2), production are cut off the second control command of gas intake pipe (9) and send to fourth valve (10), production are cut off the third control command of air intake pipe (16) and send to second valve (15), production are opened the fourth control command of surplus water inlet tube (12) and send to third valve (14), and start gas heater's fan.
12. The control method of a gas water heater according to claim 11, when a second valve (15) is further provided on the residual water exhaust pipe (13), when a third control command to shut off the air intake pipe (16) is generated and sent to the second valve (15), further comprising:
and generating a fifth control instruction for opening the residual water exhaust pipe (13) and sending the fifth control instruction to the second valve (15).
13. The control method of a gas water heater according to claim 11, wherein the determining the type of post-purge includes:
acquiring the temperature of inlet water;
judging whether the inlet water temperature is less than a preset first threshold value or not;
and when the inlet water temperature is smaller than the first threshold value, judging that the type of the post-cleaning is the anti-freezing post-cleaning.
14. The control method of a gas water heater according to claim 13, further comprising:
and when the water inlet temperature is greater than or equal to the first threshold value, judging that the type of post-cleaning is common post-cleaning.
15. The control method of a gas water heater according to claim 11, when the gas water heater further comprises a water flow rate monitoring device (11) provided on the residual water inlet pipe (12), further comprising, after closing the second valve (15), the first valve (2) and the fourth valve (10), opening the third valve (14), and starting a fan of the gas water heater:
acquiring the water flow monitored by the water flow monitoring device (11);
and when the water flow is smaller than a preset second threshold value, the fan is turned off.
16. The control method of the gas water heater according to claim 11, wherein the gas water heater further comprises a residual water outlet pipe (19), the residual water outlet pipe (19) is communicated with a residual water outlet on the residual water collecting device (17), a fifth valve (18) is arranged on the residual water outlet pipe (19), and a pressurizing device (20) is arranged between the fifth valve (18) and the first valve (2); a sixth valve (21) is arranged on the water inlet pipe (1) and is positioned at the upstream of the fifth valve (18), and the control method of the gas water heater further comprises the following steps:
when a water use command is received, opening the fifth valve (18) and the first valve (2), and starting the pressurizing device (20);
-acquiring the operating time of the pressurizing means (20);
when the running time reaches a preset third threshold value, the sixth valve (21) is opened.
17. The control method of a gas water heater according to claim 16, when the operation time reaches a preset third threshold, further comprising:
obtaining the feedback water pressure of the water inlet pipe (1);
judging whether the feedback water pressure is greater than or equal to the actual demand water pressure;
closing the pressurizing means (20) when the feedback water pressure is equal to or higher than the actual demand water pressure;
when the feedback water pressure is less than the actual demand water pressure, a difference between the actual demand water pressure and the feedback water pressure is calculated, and the operating parameter of the pressurizing device (20) is determined using the difference.
18. Control method of a gas water heater according to claim 16, characterized in that the third threshold value is determined according to the water temperature or the water flow speed in the inlet pipe (1).
19. A control device of a gas water heater is applied to the gas water heater, and the gas water heater comprises a residual water collecting device (17), a residual water inlet pipe (12), a residual water exhaust pipe (13), a first valve (2) arranged on the gas water heater inlet pipe (1), a second valve (15) arranged on the gas water heater air inlet pipe (16) and a fourth valve (10) arranged on the gas water heater gas inlet pipe (9); the residual water collecting device (17) is provided with a residual water inlet and a residual water exhaust port; one end of the residual water inlet pipe (12) is communicated with the residual water inlet, and the other end of the residual water inlet pipe is communicated with a hot water outlet pipe (8) of the gas water heater; one end of the residual water exhaust pipe (13) is communicated with the residual water exhaust port, and the other end of the residual water exhaust pipe is communicated with a combustion chamber of the gas water heater; still be equipped with third valve (14) on surplus water inlet tube (12), its characterized in that includes:
the post-cleaning type determining module is used for determining the type of post-cleaning when receiving a post-cleaning instruction;
back clearance module when needs clean after preventing frostbite, produces and cuts off the first control command of inlet tube (1) and send to first valve (2), production cut off the second control command of gas intake pipe (9) and send to fourth valve (10), production cut off the third control command of air intake pipe (16) and send to second valve (15), production are opened the fourth control command of surplus water inlet tube (12) and send to third valve (14), and start the fan of gas heater.
20. The control device of the gas water heater according to claim 19, further comprising a residual water outlet pipe (19), wherein the residual water outlet pipe (19) is communicated with a residual water outlet on the residual water collecting device (17), a fifth valve (18) is arranged on the residual water outlet pipe (19), and a pressurizing device (20) is arranged between the fifth valve (18) and the first valve (2); on inlet tube (1), be located the upper reaches of fifth valve (18) and still be equipped with sixth valve (21), gas heater's controlling means still includes:
a first starting module, when receiving a water use command, for opening the fifth valve (18) and the first valve (2) and starting the pressurizing device (20);
-an acquisition module for acquiring the operating time of the pressurization device (20);
the judging module is used for judging whether the running time is greater than a preset third threshold value or not;
a second enabling module that opens the sixth valve (21) when the runtime reaches the third threshold.
21. The control device of a gas water heater of claim 20, further comprising a processing module:
the processing module is used for acquiring the feedback water pressure of the water inlet pipe (1) when the running time reaches a preset third threshold value; judging whether the feedback water pressure is greater than or equal to the actual demand water pressure; closing the pressurizing means (20) when the feedback water pressure is equal to or higher than the actual demand water pressure; when the feedback water pressure is less than the actual demand water pressure, a difference between the actual demand water pressure and the feedback water pressure is calculated, and the operating parameter of the pressurizing device (20) is determined using the difference.
22. A gas water heater, comprising:
a memory and a processor, the memory and the processor being communicatively connected to each other, the memory having stored therein computer instructions, the processor executing the computer instructions to perform the method of controlling a gas water heater according to any one of claims 11 to 18.
23. A computer-readable storage medium characterized in that the computer-readable storage medium stores computer instructions for causing the computer to execute the control method of a gas water heater according to any one of claims 11 to 18.
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