CN109140756B - Gas water heater and control method - Google Patents
Gas water heater and control method Download PDFInfo
- Publication number
- CN109140756B CN109140756B CN201811190699.7A CN201811190699A CN109140756B CN 109140756 B CN109140756 B CN 109140756B CN 201811190699 A CN201811190699 A CN 201811190699A CN 109140756 B CN109140756 B CN 109140756B
- Authority
- CN
- China
- Prior art keywords
- water
- branch
- gas
- bath
- water inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- 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
- F24H1/107—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 using fluid fuel
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
Abstract
The invention discloses a gas water heater and a control method, relates to the technical field of fluid heat exchangers, can switch different purification functions according to different requirements, is healthy in water consumption and effectively prevents the heat exchanger from being corroded and leaking water. The gas water heater comprises a shell, wherein a heat exchanger, a water inlet pipe and a water outlet pipe are arranged in the shell, the water inlet pipe comprises a bath water inlet branch and a water storage purification branch which are connected in parallel, a bath water filter for purifying bath water is communicated in the bath water inlet branch, and a water storage filter for filtering water passing through the water storage purification branch into weakly acidic water is arranged in the water storage purification branch; the water outlet pipe comprises a bath water outlet branch and a water discharge branch which are connected in parallel; when the gas water heater works, the bath water inlet branch of the water inlet pipe is used for feeding water, the bath water outlet branch of the water outlet pipe is used for discharging water, after the gas water heater works, the water storage purification branch of the water inlet pipe is used for feeding water, and the water discharge branch of the water outlet pipe is used for discharging water so as to replace water in the heat exchanger. The invention is used for preparing hot water.
Description
Technical Field
The invention relates to the technical field of fluid heat exchangers, in particular to a gas water heater and a control method.
Background
The gas water heater is also called as a gas water heater, and refers to a gas appliance which takes gas as fuel and transfers heat to cold water flowing through a heat exchanger in a combustion heating mode so as to achieve the purpose of preparing hot water. According to the survey feedback, after the gas water heater is used for a period of time (generally about one year), water leakage faults often occur. The water quality of tap water in different regions is different, particularly the tap water in partial regions is poor and alkaline, and the tap water contains a large amount of chloride ions, sulfate ions and bicarbonate radicals, and the tap water and the copper heat exchanger undergo chemical reaction to generate cavitation corrosion, so that the gas water heater has water leakage faults. Therefore, the water entering the gas water heater needs to be filtered and purified to prevent the copper from chemically reacting with harmful substances in tap water, so that the copper heat exchanger is protected from being corroded, the risk of water leakage is reduced, and the service life of the gas water heater is prolonged.
The prior art provides a water heater, as shown in fig. 1, including the box 01, be equipped with heat exchanger 02 in the box 01, be equipped with the inlet tube 03 with the leading-in heat exchanger 02 of water on the box 01, and with the exhaust outlet pipe 04 of water, wherein, the inlet tube 03 includes the first branch of intaking 031 and the second branch of intaking 032 that parallel, it has the filter equipment 05 that is used for filtering large granule object and has the water softener 06 of ion exchange resin to intake in the second branch of intaking 032, the front end of first branch of intaking 031 and second branch of intaking 032 is equipped with three-way valve 07. When the tap water needs to be filtered, the water inlet line is switched to the second branch 032 by the three-way valve 07, and then the tap water is filtered by the filtering device 05 and the water softener 06.
However, the water heater of the prior art is only used for providing healthier domestic water, and the protection effect on the heat exchanger 02 is not obvious. Especially, when the water heater is in a standby state, the heat exchanger 02 is severely corroded by the water stored in the heat exchanger 02 for a long time.
Disclosure of Invention
The embodiment of the invention provides a gas water heater and a control method, which can switch different purification functions according to different requirements, use water healthily and effectively prevent the phenomenon that a heat exchanger is corroded and leaks water.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
the embodiment of the invention provides a gas water heater, which comprises a shell, wherein a heat exchanger for heat exchange, a water inlet pipe and a water outlet pipe which are communicated with the heat exchanger are arranged in the shell, the water inlet pipe comprises a bath water inlet branch and a water storage purification branch which are connected in parallel, a bath water filter for purifying bath water is communicated in the bath water inlet branch, and a water storage filter for filtering water passing through the water storage purification branch into weak acid water is arranged in the water storage purification branch; the water outlet pipe comprises a bath water outlet branch and a water discharge branch which are connected in parallel; when the gas water heater works, the bathing water inlet branch of the water inlet pipe is used for water inlet, the bathing water outlet branch of the water outlet pipe is used for water outlet, after the gas water heater works, the water storage purification branch of the water inlet pipe is used for water inlet, and the water drainage branch of the water outlet pipe is used for water outlet, so that water in the heat exchanger can be replaced.
According to the gas water heater provided by the embodiment of the invention, the water inlet pipe comprises the bathing water inlet branch and the water storage purification branch which are connected in parallel, the bathing water filter for purifying the bathing water is communicated in the bathing water inlet branch, and the water storage purification branch is internally provided with the water storage filter for filtering the water passing through the water storage purification branch into weakly acidic water; the water outlet pipe comprises a bath water outlet branch and a water discharge branch which are connected in parallel; when the gas water heater works, for example, when a user needs to take a bath, the bath water inlet branch of the water inlet pipe is used for feeding water, the bath water filter filters tap water into healthy bath water, then the tap water and the heat exchanger exchange heat to form hot water, and the bath water outlet branch of the water outlet pipe is used for discharging water; when the gas water heater finishes working and prepares for standby, the water storage purification branch of the water inlet pipe is used for water inlet, the water storage filter filters tap water into weakly acidic water, the weakly acidic water flows into the heat exchanger, the original bath water in the heat exchanger is replaced, and the replaced bath water can be discharged from the water discharge branch of the water outlet pipe. Compared with the prior art, the water purifier has two sets of independent purification systems, can switch the effect of purifying water according to different requirements, and particularly can filter tap water into weakly acidic water through the water storage filter when the gas water heater is in standby, so that water in the heat exchanger is replaced. Therefore, when the gas water heater is in a standby state, the water around the heat exchanger is weakly acidic water, so that the time of chemical reaction between the alkaline tap water and the heat exchanger is shortened, and the heat exchanger is protected. Meanwhile, the purified weak acid water can chemically react with scale in the heat exchanger to remove the scale, reduce the attenuation of the heat exchange efficiency of the heat exchanger and prolong the service life of the gas heat exchanger.
In another aspect, an embodiment of the present invention further provides a control method for the gas water heater, where the control method includes:
when the operating state operating instruction is received, the bath water filtering system is operated: the bathing water inlet branch is opened, the water storage purification branch is closed, the bathing water outlet branch is opened, the water drainage branch is closed, and tap water passes through the bathing water filter of the gas water heater;
after receiving the instruction that the operation of the working state is finished, operating the water storage filtering system: the bathing water inlet branch is closed, the water storage purification branch is opened, the bathing water outlet branch is closed, the water drainage branch is opened, and tap water passes through the water storage filter of the gas water heater.
The control method of the embodiment of the invention can switch different purification functions according to different requirements, so that the water is healthy, and the phenomena of corrosion and water leakage of the heat exchanger are effectively prevented.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art water heater;
FIG. 2 is a schematic structural diagram of a gas water heater according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a gas water heater according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the water in the heat exchanger of the gas water heater according to the embodiment of the present invention;
fig. 5 is a second schematic structural diagram of a gas water heater according to an embodiment of the invention.
Reference numerals:
01-a box body; 02-heat exchanger; 03-water inlet pipe; 031-a first water inlet branch; 032-second water inlet branch; 04-a water outlet pipe; 05-a filtration device; 06-a water softener; 07-three-way valve; 1-a shell; 11-a controller; 2-water inlet pipe; 21-bath water inlet branch; 22-water purification branch; 23-a water flow sensor; 3-water outlet pipe; 31-bath water outlet branch; 32-a drainage branch; 4-a heat exchanger; 5-bath water filter; 6-water storage filter; 61-a high pressure pump; 62-a reverse osmosis filter; 621-tap water inlet; 622-weakly acidic water outlet; 623-a waste water outlet; 63-wastewater proportioner; 7-a water inlet valve; 7' -water inlet switching valve; 8-a drain valve; 8' -water outlet switching valve; 9-display input device.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the invention provides a gas water heater, as shown in fig. 2 and 3, comprising a shell 1, wherein a heat exchanger 4 for heat exchange is arranged in the shell 1, and a water inlet pipe 2 and a water outlet pipe 3 which are communicated with the heat exchanger 4, the water inlet pipe 2 comprises a bath water inlet branch 21 and a water storage purification branch 22 which are connected in parallel, a bath water filter 5 for purifying bath water is communicated in the bath water inlet branch 21, and a water storage filter 6 for filtering water passing through the water storage purification branch 22 into weakly acidic water is arranged in the water storage purification branch 22; the water outlet pipe 3 comprises a bath water outlet branch 31 and a water discharge branch 32 which are connected in parallel; when the gas water heater works, the bath water inlet branch 21 of the water inlet pipe 2 is used for feeding water, the bath water outlet branch 31 of the water outlet pipe 3 is used for discharging water, and after the gas water heater works, the water storage purification branch 22 of the water inlet pipe 2 is used for feeding water, and the water drainage branch 32 of the water outlet pipe 3 is used for discharging water so as to replace water in the heat exchanger 4.
As shown in fig. 2 and 3, the gas water heater according to the embodiment of the present invention includes a water inlet pipe 2 including a bath water inlet branch 21 and a water storage purification branch 22 connected in parallel, a bath water filter 5 for purifying bath water is connected to the bath water inlet branch 21, and a water storage filter 6 for filtering water passing through the water storage purification branch 22 into weakly acidic water; the water outlet pipe 3 comprises a bath water outlet branch 31 and a water discharge branch 32 which are connected in parallel; when the gas water heater works, for example, when a user needs to take a bath, referring to fig. 3, the bath water inlet branch 21 of the water inlet pipe 2 is used for feeding water, the bath water filter 5 filters tap water into healthy bath water, then the tap water exchanges heat with the heat exchanger 4 to form hot water, and the hot water is discharged from the bath water outlet branch 31 of the water outlet pipe 3; when the gas water heater is ready to stand by after working, referring to fig. 4, the stored water purifying branch 22 of the water inlet pipe 2 is filled with water, the stored water filter 6 filters tap water into weakly acidic water, then the water flows into the heat exchanger 4, the original bath water in the heat exchanger 4 is replaced, and the replaced bath water can be discharged from the water discharge branch 32 of the water outlet pipe 3. Compared with the prior art, the water purifier has two sets of independent purification systems, can switch the effect of purifying water according to different requirements, and particularly can filter tap water into weakly acidic water through the water storage filter 6 and replace water in the heat exchanger 4 when the gas water heater is in standby. Thus, when the gas water heater is in a standby state, the water around the heat exchanger 4 is weakly acidic water, so that the time for the chemical reaction between the alkaline tap water and the heat exchanger 4 is reduced, and the heat exchanger 4 is protected. Meanwhile, the purified weak acid water can chemically react with the scale in the heat exchanger 4 to remove the scale, reduce the attenuation of the heat exchange efficiency of the heat exchanger 4 and prolong the service life of the gas heat exchanger. Moreover, if the gas water heater provided by the embodiment of the invention is applied to the existing gas water heater, the original combustion system and the original exhaust system are not changed, only the water path structure is changed, and the system transformation cost is greatly reduced.
There are various implementation schemes for implementing the switching of the two sets of purification systems, and for example, two embodiments are described in detail below.
Example one
As shown in fig. 2, a water inlet valve 7 for opening or closing the bath water inlet branch 21 is arranged in the bath water inlet branch 21, and the water storage filter 6 comprises a high-pressure pump 61 and a reverse osmosis filter 62 which are communicated in sequence; the drain valve 8 for opening or closing the drain branch 32 is provided in the drain branch 32.
Since the water storage filter 6 comprises the high-pressure pump 61 and the reverse osmosis filter 62 which are communicated in sequence, when the high-pressure pump 61 is started, the reverse osmosis filter 62 can be started to work, and therefore, the water inlet valve 7 which opens or closes the bath water inlet branch 21 can be directly arranged in the bath water inlet branch 21. When the gas water heater works, referring to fig. 3, the bathing water outlet branch 31 is opened by a user, at this time, the water inlet valve 7 can be controlled to open the bathing water inlet branch 21, the water outlet valve 8 closes the water outlet branch 32, tap water flows through the bathing water inlet branch 21, the bathing water filter 5 filters the tap water into healthy bathing water, hot water is formed by heat exchange with the heat exchanger 4, and water is discharged from the bathing water outlet branch 31 of the water outlet pipe 3 for the user to bathe; when the gas water heater is ready to stand by after working, namely the bathing water outlet branch 31 is closed by a user, referring to fig. 4, the water inlet valve 7 can be controlled to close the bathing water inlet branch 21, the water outlet valve 8 opens the water outlet branch 32, so that the water storage purification branch 22 is filled, the water storage filter 6 filters tap water into weakly acidic water, then the weakly acidic water flows into the heat exchanger to replace the original bathing water in the heat exchanger, and the replaced bathing water can be discharged from the water outlet branch 32 of the water outlet pipe 3.
It should be noted that reverse osmosis is also called reverse osmosis, which is a membrane separation operation that separates a solvent from a solution using a pressure difference as a driving force. The reverse osmosis filter 62 is composed of PP cotton (artificial chemical fiber made of polypropylene fiber), activated carbon and reverse osmosis membrane in sequence, and the bath water filter 5 is composed of activated carbon, calcium sulfite and copper-zinc alloy. Considering the change of filter core, the filter core is quick detach formula design, and the filter core is separable with the pipeline, through the type dismouting of rotation, lock. In addition, the cumulative service life ratio of the filter element of the bath water filter 5 is calculated by a water flow sensor or the cumulative starting time of the system. The percentage of the cumulative service life of the filter element of the bath water filter 5 is equal to the difference between the design purified water volume of the filter element of the bath water filter 5 and the cumulative water volume during bathing divided by the design purified water volume of the filter element of the bath water filter 5 multiplied by 100%. The accumulated water consumption during bathing is obtained through accumulation of the water flow sensor. The percentage of the cumulative service life of the reverse osmosis filter 62 cartridge is equal to the difference between the design purified water volume of the reverse osmosis filter cartridge and the cumulative purified water volume of the reverse osmosis filter 62 cartridge divided by the design purified water volume of the reverse osmosis filter 62 cartridge multiplied by 100%. The cumulative clean water volume in the reverse osmosis filter 62 cartridge is equal to the unit time clean water flow of the cartridge multiplied by the cumulative start-up time of the heat exchanger 4 trap water filtration system. In order to meet the requirement of water flow of a user, the sectional area of a water flow channel of the water inlet valve 7 is not less than the sectional area of a water pipe of the heat exchanger 4; the flow attenuation of the bath water filter 5 to the water flow path should be no more than 30% at a pressure of 0.1 MPa. In order to meet the normal work of the system, the inner diameter of the pipeline of the water inlet pipe 2 and the water outlet pipe 3 is more than 4 mm. The flux of the reverse osmosis filter 62 should be larger than 50G, and in order to ensure the using effect, it is preferable that the flux of the reverse osmosis filter 62 is 400G or more, and the faster the water storing speed of the heat exchanger 4 is replaced, the shorter the waiting time of the user.
In the water storage filter 6 of the present embodiment, the pressure of water is increased by the high pressure pump 61, so that water molecules move from one side of the membrane in the reverse osmosis filter 62 to the other side, and further the required purified water is obtained, meanwhile, the water blocked at the other side of the membrane contains more impurities, and the waste water needs to be discharged in time, therefore, referring to fig. 5, the reverse osmosis filter 62 includes a tap water inlet 621, a weakly acidic water outlet 622, and a waste water outlet 623, the tap water inlet 621 is communicated with the high pressure pump 61, the weakly acidic water outlet 622 is communicated with the heat exchanger 4 through the water storage purification branch 22, and the waste water outlet 623 is communicated with the drainage branch. Waste water can be discharged from the drainage branch 32 through the waste water outlet 623.
In order to adjust the filtering accuracy of the reverse osmosis filter 62, as shown in fig. 5, a wastewater proportioner 63 is provided at a wastewater outlet 623 of the reverse osmosis filter 62. The waste water proportioner 63 can adjust the pressure at the waste water outlet 623, thereby controlling the amount of the flowing waste water and having the function of stabilizing the pressure.
In order to monitor the water inflow, a water flow sensor 23 is connected to the water inlet pipe 2 as shown in fig. 2 and 3. The water flow sensor 23 can monitor the water flow information entering the heat exchanger 4 to provide effective information for automatic control. For example, generally, in order to facilitate user operation, the water inlet valve 7 is opened in a normal state, when a user opens a switch of the shower head, water in the water inlet pipe 2 is set to flow, and at this time, the gas water heater can be controlled to start various operations through water flow information detected by the water flow sensor; or, when the water in the heat exchanger 4 is replaced after the gas water heater is operated, the water flow rate is not enough to reach the starting water flow rate of the gas water heater through the water flow rate information detected by the water flow rate sensor, and the gas water heater cannot be started; or, after the gas water heater is operated, when the water in the heat exchanger 4 is replaced, the water flow information detected by the water flow sensor can know the amount of the water flowing into the heat exchanger 4, and then whether the replacement is completed can be judged.
Of course, in order to further realize automatic control, the controller 11 is further included, the water inlet valve 7, the water outlet valve 8 and the high-pressure pump 61 are electrically connected with the controller 11, and the controller 11 is used for controlling the operation states of the water inlet valve 7, the water outlet valve 8 and the high-pressure pump 61.
In order to facilitate man-machine exchange, as shown in fig. 2, the gas water heater further comprises a display input device 9, wherein the display input device 9 is used for displaying the working states of the gas water heater, the bath water filter 5 and the water storage filter 6 and inputting an operation instruction to the controller 11 by a user. The display input device 9 may provide various information, specifically, the information may be displayed by numbers or images, or may be on/off signals of indicator lights, and the user may input the operation instruction to the controller 11 by a mode such as case input, touch input, or voice input.
After the display input device 9 is arranged, a user can conveniently acquire the working state of the gas heat exchanger, and can conveniently control and carry out corresponding actions. For example, when the gas heat exchanger is replacing the stored water in the heat exchanger 4, and the user cannot take a shower at this time, the display and input device 9 may prompt the user to replace the stored water in the heat exchanger through the status indicator lamp, the gas water heater cannot be used by heating at this time, and the user is prompted by buzzing after the replacement is completed, and the indicator lamp is turned off. For example, the display input device 9 displays the corresponding filter activation state, and the system activation is performed when the filter icon is turned on, and the system deactivation is performed when the filter icon is turned off. The user can be reminded to replace the filter element through indication of three different colors and the like, and the filtering effect is guaranteed. For example, green indicates that the cartridge is in good condition, yellow indicates that the cartridge has reached 80% useful life, and red indicates that the cartridge has reached its limit of useful life and needs replacement. And after the new filter element is replaced, the state of the filter element is reset by pressing a preset combined key.
Example two
As shown in fig. 5, the front ends of the bath water inlet branch 21 and the water storage purification branch 22 are both communicated with the water inlet switching valve 7', and the water inlet switching valve 7' can make water flow pass through any one of the bath water inlet branch 21 and the water storage purification branch 22; the front ends of the bath water outlet branch 31 and the drainage branch 32 are both communicated with the water outlet switching valve 8', and the water outlet switching valve 8' can lead water flow to pass through any one of the bath water outlet branch 31 and the drainage branch 32.
The path of water flow can be directly controlled through the water inlet switching valve 7 'and the water outlet switching valve 8', when the gas water heater works, the water inlet switching valve 7 'switches water inlet into a bath water inlet branch 21, the water outlet switching valve 8' switches water outlet into a bath water outlet branch 31, tap water flows through the bath water inlet branch 21, the bath water filter 5 filters the tap water into healthy bath water, hot water is obtained by heat exchange with the heat exchanger 4, and water is discharged from the bath water outlet branch 31 of the water outlet pipe 3 for a user to take a bath; when the gas water heater is ready to stand by after working, the water inlet switching valve 7 'switches the water inlet into the water storage purification branch 22, the water outlet switching valve 8' switches the water outlet into the water discharge branch 32, then the water storage purification branch 22 is enabled to be filled with water, the tap water is filtered into weak acidic water by the water storage filter 6 and flows into the heat exchanger 4, the original bath water in the heat exchanger 4 is replaced, and the replaced bath water can be discharged from the water discharge branch 32 of the water outlet pipe 3.
The water storage filter 6 of the gas water heater of the embodiment can directly realize the control and switching of the water inlet route through the water inlet switching valve 7' and has the characteristic of conduction without active starting of the high-pressure pump 62, so the water storage filter 6 can comprise the high-pressure pump 61 and the reverse osmosis filter 62 which are sequentially communicated, and can also be a device which can add an acidic reagent into water flow. In comparison, the way of adding the acidic reagent into the water flow is affected by different water qualities, so that the pH value cannot be accurately controlled, and the using effect is continuously deteriorated. Therefore, it is also preferable to use the high-pressure pump 61 and the reverse osmosis filter 62.
In addition to making the tap water a weakly acidic water which is less likely to react with the copper pipe, the material of the heat exchanger 4 may be replaced. For example, the replacement heat exchanger 4 is made of stainless steel, which is advantageous only in terms of high corrosion resistance. However, the heat exchanger 4 made of stainless steel has poor heat exchange efficiency and processing reliability as compared with a copper heat exchanger, and is likely to cause welding heat cracks during welding, resulting in water leakage of the heat exchanger.
Of course, the gas water heater of the present embodiment may also be provided with the controller 11 and the display input device 9 as in the present embodiment, so as to realize automatic control and man-machine exchange.
On the other hand, the embodiment of the invention also provides a control method for the gas water heater, and the control method comprises the following steps:
when the operating state operating instruction is received, the bath water filtering system is operated: the bathing water inlet branch 21 is opened, the water storage purification branch 22 is closed, the bathing water outlet branch 31 is opened, and the water drainage branch 32 is closed, so that tap water passes through the bathing water filter 5 of the gas water heater;
after receiving the instruction that the operation of the working state is finished, operating the water storage filtering system: the bathing water inlet branch 21 is closed, the water storage purification branch 22 is opened, the bathing water outlet branch 31 is closed, and the water drainage branch 32 is opened, so that tap water passes through the water storage filter 6 of the gas water heater.
The control method of the embodiment of the invention can switch different purification functions according to different requirements, so that the water is healthy, and the phenomena of corrosion and water leakage of the heat exchanger are effectively prevented.
In the process of actual use of the gas water heater, if the operation of the working state is finished each time, the water storage and filtration system is operated immediately, and the user experience and the equipment can be influenced. Specifically, on one hand, some users turn off hot water to apply soap during bathing and then need to use water again, and on the other hand, the system is frequently started, which causes energy waste and damages corresponding component devices in the system. Therefore, in order to improve user experience and avoid frequent starting of the system, after the gas water heater is normally used, a preset time can be set for delaying, and after the preset time is over, the water storage and filtration system is set to operate. Namely, the control method further includes: when an instruction of finishing the operation in the working state is received, delaying for a preset time, and then operating the water storage filtering system.
The preset time can be set according to needs and can be adjusted at any time, and generally, the default preset time is preferably 5 minutes. In addition, the preset time can be displayed on the display input device 9 in a timed manner, so that the user can know the working state conveniently.
In order to accurately replace water in the heat exchanger 4, a water flow sensor 23 is communicated with the water inlet pipe 2 of the gas water heater, and the water flow sensor 23 is positioned at the rear end of the water storage purification branch 22; the control method further comprises the following steps:
when the water storage filtering system is operated, the water flow sensor 23 detects water flow information;
judging the magnitude relation between the water flow information and the water storage amount information in the heat exchanger 4 of the gas water heater;
if the water content is larger than or equal to the preset value, the operation of the water storage filtering system is stopped.
By judging the magnitude relation between the water flow information detected by the water flow sensor 23 and the water storage amount information in the heat exchanger 4 of the gas water heater, the amount of the weakly acidic water flowing into the heat exchanger 4 can be known, and if the detected water flow is larger than or equal to the water storage amount information, the replacement is completed, so that the operation of the stored water filtering system can be stopped at the moment.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. A gas water heater comprises a shell, wherein a heat exchanger for heat exchange, a water inlet pipe and a water outlet pipe which are communicated with the heat exchanger are arranged in the shell, and the gas water heater is characterized in that the water inlet pipe comprises a bath water inlet branch and a water storage purification branch which are connected in parallel, a bath water filter for purifying bath water is communicated in the bath water inlet branch, and a water storage filter for filtering water passing through the water storage purification branch into weakly acidic water is arranged in the water storage purification branch; the water outlet pipe comprises a bath water outlet branch and a water discharge branch which are connected in parallel; when the gas water heater works, the bathing water inlet branch of the water inlet pipe is used for water inlet, the bathing water outlet branch of the water outlet pipe is used for water outlet, after the gas water heater works, the water storage purification branch of the water inlet pipe is used for water inlet, and the water drainage branch of the water outlet pipe is used for water outlet, so that water in the heat exchanger can be replaced.
2. The gas water heater of claim 1, wherein a water inlet valve for opening or closing the bath water inlet branch is arranged in the bath water inlet branch, and the water storage filter comprises a high-pressure pump and a reverse osmosis filter which are communicated in sequence; and a drain valve for opening or closing the drain branch is arranged in the drain branch.
3. The gas water heater of claim 2, wherein the reverse osmosis filter includes a tap water inlet in communication with the high pressure pump, a weak acid water outlet in communication with the heat exchanger through the stored water purification branch, and a waste water outlet in communication with the drain branch.
4. The gas water heater of claim 3, wherein the waste water outlet of the reverse osmosis filter is provided with a waste water proportioner.
5. The gas water heater of claim 1, wherein a water flow sensor is connected to the water inlet pipe.
6. The gas water heater of claim 2, further comprising a controller, wherein the water inlet valve, the water drain valve and the high pressure pump are electrically coupled to the controller, and the controller is configured to control the operation status of the water inlet valve, the water drain valve and the high pressure pump.
7. The gas water heater of claim 6, further comprising a display input device for displaying the operating status of said gas water heater, said bath water filter and said water trap filter, and for a user to input operating instructions to the controller.
8. The gas water heater of claim 1, wherein the water inlet branch of the bath water and the water storage purification branch are both connected to a water inlet switching valve, and the water inlet switching valve can allow water to pass through either the water inlet branch of the bath water or the water storage purification branch; the front ends of the bath water outlet branch and the drainage branch are communicated with a water outlet switching valve, and the water outlet switching valve can enable water flow to pass through any one of the bath water outlet branch and the drainage branch.
9. The gas water heater of claim 8, wherein the water trap filter is a device that adds an acid agent to the water flow.
10. A control method for a gas water heater according to any one of claims 1 to 9, characterized in that the control method comprises:
when the operating state operating instruction is received, the bath water filtering system is operated: the bathing water inlet branch is opened, the water storage purification branch is closed, the bathing water outlet branch is opened, the water drainage branch is closed, and tap water passes through the bathing water filter of the gas water heater;
after receiving the instruction that the operation of the working state is finished, operating the water storage filtering system: the bathing water inlet branch is closed, the water storage purification branch is opened, the bathing water outlet branch is closed, the water drainage branch is opened, and tap water passes through the water storage filter of the gas water heater.
11. The control method of the gas water heater according to claim 10, wherein when receiving the instruction of the operation completion of the operation state, the operation of the water storage filtering system is delayed for a preset time.
12. The control method of the gas water heater according to claim 10, wherein a water flow sensor is communicated with the water inlet pipe of the gas water heater, and the water flow sensor is positioned at the rear end of the water storage purification branch; the control method further comprises the following steps:
when the water storage filtering system is operated, the water flow sensor detects water flow information;
judging the size relation between the water flow information and the water storage information in the heat exchanger of the gas water heater;
if the water storage quantity is larger than or equal to the preset value, the operation of the water storage filtering system is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811190699.7A CN109140756B (en) | 2018-10-12 | 2018-10-12 | Gas water heater and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811190699.7A CN109140756B (en) | 2018-10-12 | 2018-10-12 | Gas water heater and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109140756A CN109140756A (en) | 2019-01-04 |
| CN109140756B true CN109140756B (en) | 2020-08-21 |
Family
ID=64811534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811190699.7A Active CN109140756B (en) | 2018-10-12 | 2018-10-12 | Gas water heater and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109140756B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110806010B (en) * | 2019-11-01 | 2024-02-23 | 华帝股份有限公司 | Water heater water purification system, control method thereof and water heater |
| CN111238026A (en) * | 2020-02-28 | 2020-06-05 | 华帝股份有限公司 | Multi-stage water purification integrated device, zero-cold-water gas water heater and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203629029U (en) * | 2013-08-29 | 2014-06-04 | 芜湖美的厨卫电器制造有限公司 | Gas water heater |
| CN203848509U (en) * | 2014-03-04 | 2014-09-24 | 芜湖美的厨卫电器制造有限公司 | Water heater with water purification function |
| CN203980646U (en) * | 2014-06-26 | 2014-12-03 | 广东万家乐燃气具有限公司 | Multifunctinoal health water heater |
| CN206447663U (en) * | 2016-12-23 | 2017-08-29 | 青岛海尔智能技术研发有限公司 | Water heater |
| CN206670079U (en) * | 2017-02-20 | 2017-11-24 | 广东万家乐燃气具有限公司 | It is a kind of can intelligent water purification blowdown gas heater |
-
2018
- 2018-10-12 CN CN201811190699.7A patent/CN109140756B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203629029U (en) * | 2013-08-29 | 2014-06-04 | 芜湖美的厨卫电器制造有限公司 | Gas water heater |
| CN203848509U (en) * | 2014-03-04 | 2014-09-24 | 芜湖美的厨卫电器制造有限公司 | Water heater with water purification function |
| CN203980646U (en) * | 2014-06-26 | 2014-12-03 | 广东万家乐燃气具有限公司 | Multifunctinoal health water heater |
| CN206447663U (en) * | 2016-12-23 | 2017-08-29 | 青岛海尔智能技术研发有限公司 | Water heater |
| CN206670079U (en) * | 2017-02-20 | 2017-11-24 | 广东万家乐燃气具有限公司 | It is a kind of can intelligent water purification blowdown gas heater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109140756A (en) | 2019-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3443308B2 (en) | Electrolyzed water generator | |
| CN109140756B (en) | Gas water heater and control method | |
| CN208577523U (en) | A kind of water purification system with water-driven tank | |
| JP3896210B2 (en) | Electrolyzed water generator | |
| CN105036400A (en) | Water purifier | |
| CN103936179B (en) | Drinking water treatment equipment | |
| CN105776685B (en) | Water purifier | |
| CN204723864U (en) | Water purification unit and wastewater control system thereof | |
| CN203781937U (en) | Drinking water treatment equipment | |
| CN203781936U (en) | Drinking water treatment equipment | |
| CN215102326U (en) | Integrated water route board and have water purifier of this integrated water route board | |
| CN205367980U (en) | Little waste water purifier | |
| CN109276999A (en) | Water purifier control method and system | |
| CN204999725U (en) | Purifier | |
| CN209853856U (en) | Intelligent faucet and water taking control system | |
| CN114764018A (en) | Intelligent water meter with water quality cleaning and automatic flushing functions and control method thereof | |
| CN108569793B (en) | Compact type household water purifier complete machine device and control method | |
| JP2593240Y2 (en) | Water treatment device connection type switching tap | |
| JPH06241564A (en) | Hot water supply apparatus including water purifier | |
| CN216549882U (en) | Water purifying device | |
| CN211394051U (en) | Water purifier | |
| CN220887126U (en) | Water route structure and water purification unit of water purification unit | |
| CN202876658U (en) | Water purifying device | |
| CN212198548U (en) | Instant heating type water dispenser matched with water purifier for use | |
| CN211394050U (en) | Water purifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |