CN113465186A - Gas water heater and control method thereof - Google Patents
Gas water heater and control method thereof Download PDFInfo
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- CN113465186A CN113465186A CN202110855761.5A CN202110855761A CN113465186A CN 113465186 A CN113465186 A CN 113465186A CN 202110855761 A CN202110855761 A CN 202110855761A CN 113465186 A CN113465186 A CN 113465186A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The application relates to a gas water heater and a control method and device thereof. The control method comprises the following steps: if the water using device uses hot water and the water temperature of the water outlet pipe is higher than the preset water temperature, controlling the controlled three-way valve to enter a first state, controlling the fan to supply air in a first air supply mode, and starting the water pump; and after the fan supplies air in the first air supply mode, if the water temperature of the water outlet pipe is reduced to the preset water temperature, controlling the controlled three-way valve to enter a second state, and controlling the fan to supply air in the second air supply mode and controlling the combustion system to start combustion. This scheme makes just flow out from gas heater when leaving water temperature satisfies user's needs, and the temperature fluctuation when having reduced the user and using hot water.
Description
Technical Field
The application relates to the technical field of hot water supply, in particular to a gas water heater and a control method thereof.
Background
The gas water heater takes gas as fuel, transfers heat to cold water in the heat exchanger in a combustion heating mode, and realizes heat exchange with the cold water in the heat exchanger so as to achieve the purpose of preparing hot water. The gas water heater has been developed for many years, has the advantages of convenient installation, good use safety and the like, and is widely applied to occasions needing hot water, such as bathrooms, kitchens and the like.
However, the gas water heater in the traditional technology has the problem of large water temperature fluctuation.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a control method for a gas water heater, which can make the gas water heater output hot water with small water temperature fluctuation to a water using device.
The second technical problem to be solved by the invention is to provide a gas water heater, which can output hot water with small water temperature fluctuation to a water consumption device.
The first technical problem is solved by the following technical scheme:
a control method of a gas water heater comprises a fan, a heat exchanger, a combustion system, a controlled three-way valve, a water inlet pipe, a water outlet pipe and a water pump, wherein the fan is used for supplying air to the heat exchanger and the combustion system, the combustion system is used for heating water flow in the heat exchanger, the water inlet pipe is connected with a water inlet of the heat exchanger, the water outlet pipe is connected with a water outlet of the heat exchanger, a hot water inlet end of the controlled three-way valve is communicated with the water outlet pipe, a hot water outlet end of the controlled three-way valve is used for outputting hot water to a water using device, a water return end of the controlled three-way valve is connected with the water inlet pipe, and the water pump is used for pumping water flow to the heat exchanger and comprises the following steps: if the water using device uses hot water and the water temperature of the water outlet pipe is higher than the preset water temperature, controlling the controlled three-way valve to enter a first state, controlling the fan to supply air in a first air supply mode, and starting the water pump; when the controlled three-way valve is in a first state, the hot water outlet end of the controlled three-way valve is cut off, and the water flow of the water outlet pipe flows back to the heat exchanger through the hot water inlet end and the water return end of the controlled three-way valve; after the fan supplies air in the first air supply mode, if the water temperature of the water outlet pipe is reduced to the preset water temperature, the controlled three-way valve is controlled to enter a second state, and the fan is controlled to supply air in the second air supply mode and control the combustion system to start combustion; when the controlled three-way valve is in the second state, the water return end of the controlled three-way valve is cut off, and the water flow of the water outlet pipe flows out from the hot water inlet end and the hot water outlet end of the controlled three-way valve.
Based on the control method of the gas water heater in the embodiment of the invention, when the water temperature in the water outlet pipe of the gas water heater is too high, the controlled three-way valve is controlled to enter the first state, so that hot water cannot flow to the water using device, the hot water with the too high temperature circulates in the gas water heater through the driving of the water pump, the heat exchanger is cooled through the fan at the moment, and the water temperature of water flow in the heat exchanger is gradually reduced to the preset temperature while the heat exchanger is cooled. At this time, the controlled three-way valve is controlled to enter a second state so that water with a proper temperature flows to a user. In order to ensure that the gas water heater can continuously supply hot water with proper temperature to the water using device, the combustion system needs to be started and the fan needs to be controlled to supply air in the second air supply mode to realize gas combustion, and heat is continuously supplied to the heat exchanger. This scheme makes just flow out from gas heater when leaving water temperature satisfies user's needs, and the temperature fluctuation when having reduced the user and using hot water.
In one embodiment, the control method comprises the following steps: if the water using device uses hot water and the water temperature of the water outlet pipe is lower than the preset water temperature, controlling the controlled three-way valve to enter a first state, controlling the fan to supply air in a third air supply mode, and starting the water pump; and after the fan supplies air in the third air supply mode, controlling the fan to supply air in the second air supply mode and controlling the combustion system to start combustion, and controlling the controlled three-way valve to enter a second state when the water temperature of the water outlet pipe is increased to a preset water temperature.
The gas system is pre-purged before starting the combustion system so that the combustion system can be safely ignited.
In one embodiment, the control method comprises the following steps: if the hot water device uses hot water, acquiring the water flow in a water path formed by the water inlet pipe, the water outlet pipe and the heat exchanger; and if the water flow is smaller than the preset water flow, judging that the gas water heater has water leakage.
In one embodiment, the control method further includes: acquiring the water pressure of a hot water outlet end of the controlled three-way valve; and if the difference value between the water pressure and the initial water pressure is greater than the preset pressure value, judging that the water using device uses hot water.
In one embodiment, if the water using device uses hot water and the water temperature of the water outlet pipe is higher than a preset water temperature, the controlled three-way valve is controlled to enter a first state, the fan is controlled to supply air in a first air supply mode, and the step of starting the water pump comprises the following steps: acquiring the room temperature at the setting position of the gas water heater; if the room temperature is higher than the preset room temperature, the water using device uses hot water, and the water temperature of the water outlet pipe is higher than the preset water temperature, the controlled three-way valve is controlled to enter a first state, the fan is controlled to supply air in a first air supply mode, and the water pump is started; if the room temperature is lower than the preset room temperature, the water using device uses hot water, and the water temperature of the water outlet pipe is higher than the preset water temperature, the controlled three-way valve is controlled to enter a first state, the fan is controlled to supply air in a fourth air supply mode, and the water pump is started; the output power of the fan in the fourth air supply mode is smaller than that of the fan in the first air supply mode.
When the room temperature is lower, the better cooling effect can be achieved by reducing the power of the fan, so that the gas water heater has better energy-saving effect.
The second technical problem is solved by the following technical solutions:
a gas water heater comprising: a heat exchanger; a combustion system for heating the water stream within the heat exchanger; the fan is used for supplying air to the heat exchanger and the combustion system; the water inlet pipe is connected with the water inlet of the heat exchanger; the water outlet pipe is connected with a water outlet of the heat exchanger; the water temperature sensor is arranged on the water outlet pipe and used for collecting the water temperature of the water outlet pipe; a water pump for pumping a flow of water to the heat exchanger; the hot water inlet end of the controlled three-way valve is communicated with the water outlet pipe, the hot water outlet end of the controlled three-way valve is used for outputting hot water to the water using device, and the water return end of the controlled three-way valve is connected with the water inlet pipe; when the controlled three-way valve is in a first state, the hot water outlet end of the controlled three-way valve is cut off, and the water flow of the water outlet pipe flows back to the heat exchanger through the hot water inlet end and the water return end of the controlled three-way valve; when the controlled three-way valve is in the second state, the water return end of the controlled three-way valve is cut off, and the water flow of the water outlet pipe flows out from the hot water inlet end and the hot water outlet end of the controlled three-way valve; the controller is connected with the combustion system, the fan, the water temperature sensor, the controlled three-way valve and the water pump and used for controlling the controlled three-way valve to enter a first state, controlling the fan to supply air in a first air supply mode and starting the water pump if the water using device uses hot water and the water temperature of a water outlet pipe fed back by the water temperature sensor is higher than a preset water temperature; and after the fan supplies air in the first air supply mode, if the water temperature of the water outlet pipe is reduced to the preset water temperature, controlling the controlled three-way valve to enter a second state, and controlling the fan to supply air in the second air supply mode and controlling the combustion system to start combustion.
Based on the gas water heater in the embodiment of the invention, when the water temperature in the water outlet pipe of the gas water heater is too high, the controlled three-way valve is controlled to enter the first state, so that hot water cannot flow to the water using device, the hot water with the too high temperature circulates in the gas water heater through the driving of the water pump, the heat exchanger is cooled through the fan at the moment, and the water temperature of water flow in the heat exchanger is gradually reduced to the preset temperature while the heat exchanger is cooled. At this time, the controlled three-way valve is controlled to enter a second state so that water with a proper temperature flows to a user. In order to ensure that the gas water heater can continuously supply hot water with proper temperature to the water using device, the combustion system needs to be started and the fan needs to be controlled to supply air in the second air supply mode to realize gas combustion, and heat is continuously supplied to the heat exchanger. This scheme makes just flow out from gas heater when leaving water temperature satisfies user's needs, and the temperature fluctuation when having reduced the user and using hot water.
In one embodiment, the gas water heater further comprises a constant-temperature water tank, the constant-temperature water tank is arranged on the water outlet pipe and is used for reducing water temperature fluctuation of water flowing into the controlled three-way valve; the water temperature sensor is arranged between the hot water inlet end of the controlled three-way valve and the water outlet of the constant temperature water tank.
The temperature of the water flow flowing out of the heat exchanger is balanced through the constant temperature water tank, and the water temperature fluctuation at the water outlet pipe is reduced, so that the controller is prevented from frequently changing the state of the controlled three-way valve.
In one embodiment, the gas water heater further comprises a water flow sensor, wherein the water flow sensor is used for acquiring water flow in a water path formed by the water inlet pipe, the water outlet pipe and the heat exchanger; the controller is connected with the water flow sensor and is used for obtaining the water flow fed back by the water flow sensor if the hot water device uses hot water and judging that water leakage occurs in the gas water heater if the water flow is smaller than preset water flow.
In one embodiment, the gas water heater further comprises a pressure sensor, wherein the pressure sensor is used for acquiring the water pressure of a hot water outlet end of the controlled three-way valve; the controller is connected with the pressure sensor and used for obtaining the water pressure fed back by the pressure sensor and judging that the water using device uses hot water if the difference value of the water pressure and the initial water pressure is larger than a preset pressure value.
In one embodiment, the gas water heater further comprises a room temperature sensor, wherein the room temperature sensor is used for acquiring the room temperature at the position where the gas water heater is arranged; the controller is connected with the room temperature sensor and is used for acquiring the room temperature fed back by the room temperature sensor; if the room temperature is higher than the preset room temperature, the water using device uses hot water, and the water temperature of the water outlet pipe is higher than the preset water temperature, the controlled three-way valve is controlled to enter a first state, the fan is controlled to supply air in a first air supply mode, and the water pump is started; the water supply device is also used for controlling the controlled three-way valve to enter a first state, controlling the fan to supply air in a fourth air supply mode and starting the water pump if the room temperature is lower than the preset room temperature, the water supply device uses hot water and the water temperature of the water outlet pipe is higher than the preset water temperature; the output power of the fan in the fourth air supply mode is smaller than that of the fan in the first air supply mode.
When the room temperature is lower, the better cooling effect can be achieved by reducing the power of the fan, so that the gas water heater has better energy-saving effect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a diagram of an embodiment of a gas water heater;
FIG. 2 is a schematic structural diagram of a gas water heater in one embodiment;
FIG. 3 is a schematic flow chart diagram of a control method for a gas water heater in one embodiment;
FIG. 4 is a schematic flow chart of a control method of a gas water heater in another embodiment;
FIG. 5 is a flowchart illustrating the steps of determining a water leak in a gas water heater according to one embodiment;
FIG. 6 is a schematic flow chart illustrating the steps for determining hot water usage by a water consuming device according to one embodiment;
FIG. 7 is a schematic flow chart illustrating the steps for selecting a fan output power based on room temperature in one embodiment;
FIG. 8 is a schematic structural diagram of a gas water heater in another embodiment;
FIG. 9 is a schematic structural view of a gas water heater in yet another embodiment;
FIG. 10 is a block diagram showing the structure of a control device of the gas water heater in one embodiment;
description of reference numerals: 100-a gas water heater, 101-a heat exchanger, 103-a combustion system, 105-a controlled three-way valve, 107-a water inlet pipe, 109-a water outlet pipe, 111-a water pump, 113-a water temperature sensor, 115-a controller, 117-a constant temperature water tank, 11-a first control module and 13-a second control module.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
Just as background art, the gas heater among the prior art has the great problem of temperature fluctuation. The inventor finds that the problem is caused by the fact that the hot water is opened and closed for multiple times during the period that the user uses the hot water, for example, when bathing products such as shower gel and shampoo are used for bathing, the hot water is closed first, and the hot water is opened again after the bathing products are used for bathing. During the period that the combustion system is temporarily shut down, the waste heat of the heat exchanger can continuously heat the water flow in the heat exchanger, resulting in that the water temperature of the water flow is continuously increased, so that the overheated hot water flows out when the user continues to use the hot water, which brings a bad use experience to the user and even can scald the user.
Based on the reasons, the invention provides a control method of a gas water heater. Please refer to fig. 1, which illustrates an application scenario of a gas water heater provided in an embodiment of the present application, in which a water return pipe is connected between a cold water pipe and a hot water pipe at a farthest water using device, and circulation preheating may be performed through the water return pipe to implement a zero cold water function.
Fig. 2 shows a gas water heater 100 according to an embodiment of the present invention, where the gas water heater 100 includes a blower (not shown), a heat exchanger 101, a combustion system 103, a controlled three-way valve 105, a water inlet pipe 107, a water outlet pipe 109, and a water pump 111. The blower is used for supplying air to the heat exchanger 101 and the combustion system 103, and the gas and the air can be better combusted when being mixed in a proper ratio, so that the air needs to be sent into the space where the heat exchanger 101 and the combustion system 103 are located through the blower. The fan structure in the gas water heater 100 includes an upper fan, a lower fan, etc., and the present invention does not limit the installation position, model, etc. of the fans, as long as the fans can supply air to the heat exchanger 101 and the combustion system 103. The combustion system 103 is used for heating the water flow in the heat exchanger 101, the combustion system 103 comprises a burner, a gas valve, an ignition device and the like, the combustion system 103 ignites the gas delivered by the gas valve through the ignition device, the heat generated by the gas combustion is transferred into the heat exchanger 101, and the heat exchanger 101 transfers the heat into the water flow to generate hot water. The water inlet pipe 107 is connected to the water inlet of the heat exchanger 101. The water outlet pipe 109 is connected with the water outlet of the heat exchanger 101. The controlled three-way valve 105 includes three ports, namely a hot water inlet port, a hot water outlet port and a water return port, and the controlled three-way valve 105 can change the on and off states of the ports under the driving of a control signal. The hot water inlet end of the controlled three-way valve 105 is communicated with the water outlet pipe 109, the hot water outlet end of the controlled three-way valve 105 is used for outputting hot water to the water using device, and the water return end of the controlled three-way valve 105 is connected with the water inlet pipe 107. The water pump 111 is used to pump a flow of water to the heat exchanger 101.
As shown in fig. 3, the control method of the gas water heater 100 includes steps S110 and S130.
S110, if the water using device uses hot water and the water temperature of the water outlet pipe 109 is higher than the preset water temperature, the controlled three-way valve 105 is controlled to enter the first state, the blower is controlled to supply air in the first air supply mode, and the water pump 111 is started.
When the controlled three-way valve 105 is in the first state, the hot water outlet of the controlled three-way valve 105 is closed, and the water flow of the water outlet pipe 109 flows back to the heat exchanger 101 through the hot water inlet and the return water end of the controlled three-way valve 105. It is understood that the preset water temperature is a water temperature set according to a water temperature required by a user. The user can input the required water temperature to the gas water heater 100, the preset temperature can be the same as the water temperature, and the size of the preset water temperature can be set based on the water temperature by comprehensively considering factors such as temperature reduction, room temperature and the like in the water delivery process. When the user uses hot water but the water temperature is too high, the hot water outlet end of the controlled three-way valve 105 is cut off by controlling the controlled three-way valve 105 to enter the first state, so that the overheated hot water is prevented from flowing to the water using device. In the first state, the controlled three-way valve 105 is in communication between the hot water inlet end and the water return end, and the superheated hot water in the heat exchanger 101 flows back to the heat exchanger 101 through the water outlet of the heat exchanger 101, the water outlet pipe 109, the hot water inlet end and the water return end of the controlled three-way valve 105, the water inlet pipe 107 and the water inlet of the heat exchanger 101 under the pumping of the water pump 111, so that water circulation is formed. Meanwhile, the fan is performing air supply in a first air supply mode, the first air supply mode is an operation mode in which the fan cools the heat exchanger 101, the temperature of the air supplied by the fan is similar to the room temperature, and the room temperature is far lower than the temperature of the heat exchanger 101, so the heat exchanger 101 is cooled in the first air supply mode of the fan, and the water temperature of the water flow in the heat exchanger 101 is gradually reduced during multiple water circulations. Alternatively, the output power of the fan in the first blowing mode is set according to the temperature of the heat exchanger.
And S130, after the fan supplies air in the first air supply mode, if the water temperature of the water outlet pipe 109 is reduced to the preset water temperature, controlling the controlled three-way valve 105 to enter a second state, controlling the fan to supply air in the second air supply mode and controlling the combustion system 103 to start combustion.
When the controlled three-way valve 105 is in the second state, the water return end of the controlled three-way valve 105 is cut off, and the water flow of the water outlet pipe 109 is subjected to the hot water inlet end and the hot water outlet end of the controlled three-way valve 105. It can be understood that after the water temperature of the water outlet pipe 109 is reduced to the preset water temperature, the water temperature meeting the user requirement can be conveyed to the user, at this time, the controlled three-way valve 105 is controlled to enter the second state, the water return end of the controlled three-way valve 105 is cut off, the hot water outlet end of the controlled three-way valve 105 is switched from cut-off to conduction, at this time, the water flow in the heat exchanger 101 flows to the water consumption device through the water outlet of the heat exchanger 101, the water outlet pipe 109, the hot water inlet end and the hot water outlet end of the controlled three-way valve 105, and the user can obtain the hot water with proper temperature from the water consumption device. Since the hot water is flowing to the water consuming device, the gas water heater 100 will take the cold water from the external water source through the water inlet pipe 107 and deliver the cold water to the heat exchanger 101 under the pumping of the water pump 111. In order to ensure that hot water is continuously supplied to the water consuming device, the combustion system 103 needs to be started for combustion, and the combustion system 103 can be controlled for combustion without performing front cleaning because the fan is started before. When the combustion system 103 is in combustion, the output power is adjusted according to the preset temperature, heat is continuously provided for the heat exchanger 101, and the water temperature at the water outlet pipe 109 is kept at the preset temperature. In order to ensure sufficient combustion of the fuel gas, the fan supplies air in a second air supply mode, which is a working mode in which the fan supplies a proper amount of air to the combustion system 103. Preferably, the output power of the fan in the second air supply mode may be changed according to the output power of the combustion system 103, for example, when the output power of the gas system is high, the output quantity of the gas is increased, and in order to ensure that the ratio of the gas and the air is kept at a good mixing ratio, the power of the fan in the second air supply mode is increased, and the input quantity of the air is increased.
Based on the control method of the gas water heater 100 in the embodiment of the invention, when the water temperature in the water outlet pipe 109 of the gas water heater 100 is too high, the controlled three-way valve 105 is controlled to enter the first state, so that the hot water does not flow to the water consuming device, the hot water with the too high temperature circulates in the gas water heater 100 through the driving of the water pump 111, the heat exchanger 101 is cooled through the fan at the moment, and the water temperature of the water flow in the heat exchanger 101 is gradually reduced to the preset temperature while the heat exchanger 101 is cooled. At this time, the controlled three-way valve 105 is controlled to enter the second state so that water of a proper temperature flows to the user. In order to ensure that the gas water heater 100 can continuously supply hot water with proper temperature to the water consuming device, the combustion system 103 needs to be started and the fan needs to be controlled to supply air in the second air supply mode to realize gas combustion, so as to continuously provide heat for the heat exchanger 101. The scheme ensures that the water flows out of the gas water heater 100 when the water outlet temperature meets the requirements of users, and reduces the temperature fluctuation when the users use hot water.
In one embodiment, as shown in fig. 4, the gas control method further includes S210 and S230.
And S210, if the water utilization device uses hot water and the water temperature of the water outlet pipe 109 is lower than the preset water temperature, controlling the controlled three-way valve 105 to enter a first state, controlling the fan to supply air in a third air supply mode, and starting the water pump 111.
It is understood that the third air supply mode refers to an operation mode of the fan at the time of the pre-sweep process. After the user uses hot water, incompletely combusted gas may remain in the gas water heater 100, and the pre-cleaning process is a safe process of discharging residual gas in the combustion system 103 through a fan in order to prevent a deflagration phenomenon from occurring when the combustion system 103 is ignited next time. When the water temperature of the water outlet pipe 109 is lower than the preset water temperature, the controlled three-way valve 105 is controlled to enter the first state, so that the hot water outlet end of the controlled three-way valve 105 is stopped, and the supercooled water is prevented from flowing to the water using device. In the first state, the controlled three-way valve 105 is communicated between the hot water inlet end and the water return end, and the water in the heat exchanger 101 flows back to the heat exchanger 101 through the water outlet of the heat exchanger 101, the water outlet pipe 109, the hot water inlet end and the water return end of the controlled three-way valve 105, the water inlet pipe 107 and the water inlet of the heat exchanger 101 under the pumping of the water pump 111, so that water circulation is formed.
And S230, after the fan supplies air in the third air supply mode, controlling the fan to supply air in the second air supply mode, controlling the combustion system 103 to start combustion, and controlling the controlled three-way valve 105 to enter a second state when the water temperature of the water outlet pipe 109 is increased to a preset water temperature.
It can be understood that after the blower supplies air in the third air supply mode, i.e. the gas water heater 100 is cleaned before the completion of the cleaning process, the combustion system 103 can be safely ignited. The water in the heat exchanger 101 is heated by controlling the fan and combustion system 103 such that the temperature of the water in the heat exchanger 101 is increased over a plurality of water cycles. When the temperature of the water flowing into the water outlet pipe 109 of the heat exchanger 101 reaches a preset temperature, the hot water meeting the user's requirement is delivered to the water using device by controlling the controlled three-way valve 105 to enter a second state.
In one embodiment, as shown in fig. 5, the control method of the gas water heater 100 further includes steps S310 and S330.
In S310, when the water using device uses hot water, the flow rate of water in the water path formed by the water inlet pipe 107, the water outlet pipe 109, and the heat exchanger 101 is obtained.
It is understood that the main water paths in the gas water heater 100 are the water paths formed by the water inlet pipe 107, the water outlet pipe 109 and the heat exchanger 101, and the gas water heater 100 outputs hot water through the water paths each time the water consuming device uses hot water.
And S330, if the water flow is smaller than the preset water flow, judging that the gas water heater 100 has water leakage.
Specifically, when the water passage is normal when the water supply device is supplying hot water, the flow rate of water in the water passage should be kept stable. However, when the water path has a water leakage failure, the water flow rate in the water path is inevitably reduced, and therefore, whether the water leakage failure occurs in the gas water heater 100 can be determined based on the water flow rate in the water path.
In one embodiment, the control method of the gas water heater 100 further includes: and if water leakage occurs in the gas water heater 100, controlling the gas water heater 100 to stop working. It will be appreciated that the gas water heater 100 includes a number of electrical components therein, which may cause water to intrude into the electrical components and further cause a short circuit when a water leak occurs inside the gas water heater 100. In order to ensure the safety of the gas water heater 100, the gas water heater 100 needs to be immediately controlled to stop working when a water leakage fault is determined. Further, in an embodiment, the gas water heater 100 further includes an alarm module, and the control method of the gas water heater 100 further includes: if the gas water heater 100 leaks, the alarm module is controlled to send out an alarm signal.
In one embodiment, as shown in fig. 6, the control method of the gas water heater 100 further includes step S410 and step S430.
And S410, acquiring the water pressure at the hot water outlet end of the controlled three-way valve 105.
And S430, if the difference value between the water pressure and the initial water pressure is greater than the preset pressure value, determining that the water using device uses hot water.
It can be understood that the hot water outlet port of the controlled three-way valve 105 communicates with the water using device, and when the water using device is turned on by a user, the pressure at the outlet of the water using device will become atmospheric pressure, so that the water pressure at the hot water outlet port is lowered from the initial water pressure to atmospheric pressure, so that when the difference between the water pressure and the initial water pressure is greater than a preset pressure value, it can be determined that the water using device uses hot water.
In one embodiment, as shown in fig. 7, step S110 includes step S111 to step S115.
And S111, acquiring the room temperature of the position where the gas water heater 100 is arranged.
S113, if the room temperature is higher than the preset room temperature, the water using device uses hot water, and the water temperature of the water outlet pipe 109 is higher than the preset water temperature, the controlled three-way valve 105 is controlled to enter the first state, the blower is controlled to supply air in the first air supply mode, and the water pump 111 is started.
And S115, if the room temperature is lower than the preset room temperature, the water using device uses hot water, and the water temperature of the water outlet pipe 109 is higher than the preset water temperature, controlling the controlled three-way valve 105 to enter the first state, controlling the fan to supply air in a fourth air supply mode, and starting the water pump 111.
The output power of the fan in the fourth air supply mode is smaller than that of the fan in the first air supply mode.
It will be appreciated that the room temperature may fluctuate significantly with seasonal variations, for example, the room temperature in winter will generally drop much compared to the room temperature in summer. The effect of the fan in cooling the heat exchanger 101 is related to the room temperature. The lower the room temperature, the faster the heat exchanger 101 cools down. From the perspective of rapid cooling, when the room temperature is high, the fan is controlled to supply air in the first air supply mode with high output power, and more air is supplied to the heat exchanger 101 to rapidly reduce the temperature of the heat exchanger 101. From the viewpoint of energy conservation, when the room temperature is low, the lower wind power can achieve a better cooling effect, so that the fan is controlled to supply air in a fourth air supply mode with lower power.
It should be understood that although the various steps in the flowcharts of fig. 3-7 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 3-7 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
An embodiment of the present invention further provides a gas water heater 100, as shown in fig. 8, the water heater includes a heat exchanger 101, a combustion system 103, a controlled three-way valve 105, a fan, a water inlet pipe 107, a water outlet pipe 109, a water pump 111, a water temperature sensor 113, and a controller 115.
The heat exchanger 101 includes a water inlet and a water outlet, and the water flow flows into the heat exchanger 101 through the water inlet of the heat exchanger 101 and flows out through the water outlet of the heat exchanger 101 after the heat exchange in the heat exchanger 101 is completed. The water inlet pipe 107 is connected to the water inlet of the heat exchanger 101. The water outlet pipe 109 is connected with the water outlet of the heat exchanger 101. The water temperature sensor 113 is disposed on the water outlet pipe 109 and is used for collecting the water temperature of the water outlet pipe 109. The water pump 111 is used to pump a flow of water to the heat exchanger 101, i.e. to power the flow of water in a line in communication with the heat exchanger 101.
The combustion system 103 is used for heating the water flow in the heat exchanger 101, the combustion system 103 comprises a burner, a gas valve, an ignition device and the like, the combustion system 103 ignites the gas delivered by the gas valve through the ignition device, the heat generated by the gas combustion is transferred into the heat exchanger 101, and the heat exchanger 101 transfers the heat into the water flow to generate hot water.
The blower is used for supplying air to the heat exchanger 101 and the combustion system 103, and the gas and the air can be better combusted when being mixed in a proper ratio, so that the air needs to be sent into the space where the heat exchanger 101 and the combustion system 103 are located through the blower. The fan structure in the gas water heater 100 includes an upper fan, a lower fan, etc., and the present invention does not limit the installation position, model, etc. of the fans, as long as the fans can supply air to the heat exchanger 101 and the combustion system 103.
The controlled three-way valve 105 includes three ports, namely a hot water inlet port, a hot water outlet port and a water return port, and the controlled three-way valve 105 can change the on and off states of the ports under the driving of a control signal. The hot water inlet end of the controlled three-way valve 105 is communicated with the water outlet pipe 109, the hot water outlet end of the controlled three-way valve 105 is used for outputting hot water to the water using device, and the water return end of the controlled three-way valve 105 is connected with the water inlet pipe 107. When the controlled three-way valve 105 is in the first state, the hot water outlet of the controlled three-way valve 105 is closed, and the water flow of the water outlet pipe 109 flows back to the heat exchanger 101 through the hot water inlet and the return water end of the controlled three-way valve 105. When the controlled three-way valve 105 is in the second state, the water return end of the controlled three-way valve 105 is cut off, and the water flow of the water outlet pipe 109 is subjected to the hot water inlet end and the hot water outlet end of the controlled three-way valve 105. Preferably, the controlled three-way valve 105 may be a two-position three-way solenoid valve.
The controller 115 is connected to the combustion system 103, the fan, the water temperature sensor 113, the controlled three-way valve 105, and the water pump 111 (a wiring manner is not shown in fig. 8, and different wiring manners may be selected according to layouts of various devices inside the gas water heater), and is configured to control the controlled three-way valve 105 to enter a first state, control the fan to supply air in a first air supply mode, and start the water pump 111 if the water using device uses hot water and the water temperature of the water outlet pipe 109 fed back by the water temperature sensor 113 is higher than a preset water temperature. After the blower performs air supply in the first air supply mode, if the water temperature of the water outlet pipe 109 is reduced to the preset water temperature, the controlled three-way valve 105 is controlled to enter the second state, and the blower is controlled to perform air supply in the second air supply mode and control the combustion system 103 to start combustion. For a detailed description of the functions of the controller 115, reference may be made to the above description of the control method of the gas water heater 100, and the description thereof is omitted here.
In one embodiment, as shown in fig. 9, the gas water heater 100 further comprises a constant temperature water tank 117, the constant temperature water tank 117 is disposed on the water outlet pipe 109, i.e. the constant temperature water tank 117 is communicated with the water outlet pipe 109, and the constant temperature water tank 117 is used for reducing the water temperature fluctuation of the water flow flowing into the controlled three-way valve 105. The water temperature sensor 113 is provided between the hot water inlet end of the controlled three-way valve 105 and the water outlet of the constant-temperature water tank 117. It will be appreciated that the water exiting heat exchanger 101 will mix with the water in thermostatic water tank 117, reducing fluctuations in the water temperature. When the gas water heater 100 is turned off and then turned on, the water flow is overheated by the residual heat of the heat exchanger 101, and at this time, the water is mixed with the water in the constant temperature water tank 117, and the water temperature is lowered. Thereby reducing fluctuations in the temperature of the water flowing into the controlled three-way valve 105 to prevent the controller 115 from frequently changing the state of the controlled three-way valve 105.
In one embodiment, the gas water heater 100 further includes a water flow sensor for sensing water flow within the water path formed by the inlet pipe 107, the outlet pipe 109, and the heat exchanger 101. The controller 115 is connected to the water flow sensor, and is configured to determine that water leakage occurs in the gas water heater 100 if the water flow fed back by the water flow sensor is smaller than a preset water flow. In one particular embodiment, the water flow sensor is disposed on the inlet pipe 107 of the gas water heater 100.
In one embodiment, the gas water heater 100 further includes a pressure sensor for collecting the water pressure at the hot water outlet end of the controlled three-way valve 105. The controller 115 is connected to the pressure sensor, and is configured to obtain a water pressure fed back by the pressure sensor, and determine that the water using apparatus uses hot water if a difference between the water pressure and the initial water pressure is greater than a preset pressure value. In one embodiment, a pressure sensor is provided at the hot water outlet end of the controlled three-way valve 105.
In one embodiment, the gas water heater 100 further includes a room temperature sensor for acquiring a room temperature at a location where the gas water heater 100 is installed. The controller 115 is connected to the room temperature sensor, and is configured to acquire the room temperature fed back by the room temperature sensor, and if the room temperature is greater than the preset room temperature, the water using device uses hot water, and the water temperature of the water outlet pipe 109 is higher than the preset water temperature, control the controlled three-way valve 105 to enter the first state, control the fan to supply air in the first air supply mode, and start the water pump 111. The controller 115 is further configured to control the controlled three-way valve 105 to enter the first state, control the fan to supply air in the fourth air supply mode, and start the water pump 111 if the room temperature is lower than the preset room temperature, the water using device uses hot water, and the water temperature of the water outlet pipe 109 is higher than the preset water temperature. And the output power of the fan in the fourth air supply mode is smaller than that of the fan in the first air supply mode.
In some embodiments, the controller 115 is further configured to implement the steps of any of the above-described embodiments of the control method for the gas water heater 100.
The embodiment of the invention also provides a control device of the gas water heater 100, the gas water heater 100 comprises a fan, a heat exchanger 101, a combustion system 103, a controlled three-way valve 105, a water inlet pipe 107, a water outlet pipe 109 and a water pump 111, the fan is used for supplying air to the heat exchanger 101 and the combustion system 103, the combustion system 103 is used for heating water flow in the heat exchanger 101, the water inlet pipe 107 is connected with a water inlet of the heat exchanger 101, the water outlet pipe 109 is connected with a water outlet of the heat exchanger 101, a hot water inlet end of the controlled three-way valve 105 is communicated with the water outlet pipe 109, a hot water outlet end of the controlled three-way valve 105 is used for outputting hot water to a water using device, a water return end of the controlled three-way valve 105 is connected with the water inlet pipe 107, and the water pump 111 is used for pumping water flow to the heat exchanger 101. As shown in fig. 10, the control apparatus includes a first control module 11 and a second control module 13.
The first control module 11 is configured to control the controlled three-way valve 105 to enter the first state, control the fan to supply air in the first air supply mode, and start the water pump 111 if the water using device uses hot water and the water temperature of the water outlet pipe 109 is higher than a preset water temperature. When the controlled three-way valve 105 is in the first state, the hot water outlet of the controlled three-way valve 105 is closed, and the water flow of the water outlet pipe 109 flows back to the heat exchanger 101 through the hot water inlet and the return water end of the controlled three-way valve 105.
The second control module 13 is configured to, after the fan blows air in the first air blowing mode, control the controlled three-way valve 105 to enter the second state if the water temperature of the water outlet pipe 109 matches a preset water temperature, control the fan to blow air in the second air blowing mode, control the combustion system 103 to start combustion, and start the water pump 111. When the controlled three-way valve 105 is in the second state, the water return end of the controlled three-way valve 105 is cut off, and the water flow of the water outlet pipe 109 is subjected to the hot water inlet end and the hot water outlet end of the controlled three-way valve 105.
In one embodiment, the control apparatus further comprises a third control module and a fourth control module. The third control module is used for controlling the controlled three-way valve 105 to enter the first state, controlling the fan to supply air in the third air supply mode and starting the water pump 111 if the water using device uses hot water and the water temperature of the water outlet pipe 109 is lower than the preset water temperature. The fourth control module is used for controlling the fan to supply air in the second air supply mode and controlling the combustion system 103 to start combustion after the fan supplies air in the third air supply mode, and controlling the controlled three-way valve 105 to enter the second state when the water temperature of the water outlet pipe 109 rises to the preset water temperature.
In one embodiment, the control device further comprises a water leakage monitoring module. The water leakage monitoring module is used for acquiring water flow in a water path formed by the water inlet pipe 107, the water outlet pipe 109 and the heat exchanger 101 if the water using device uses hot water, and determining that water leakage occurs in the gas water heater 100 if the water flow is smaller than a preset water flow.
In one embodiment, the control apparatus further comprises a water usage monitoring module. The water usage monitoring module is configured to obtain a water pressure at a hot water outlet of the controlled three-way valve 105 and determine that the water usage device uses hot water if a difference between the water pressure and an initial water pressure is greater than a preset pressure value.
In one embodiment, the first control module 11 includes a room temperature obtaining unit, a first control unit, and a second control unit. The room temperature acquiring unit is used for acquiring the room temperature at the position where the gas water heater 100 is disposed. The first control unit is configured to control the controlled three-way valve 105 to enter the first state, control the fan to supply air in the first air supply mode, and start the water pump 111 if the room temperature is greater than the preset room temperature, the water using device uses hot water, and the water temperature of the water outlet pipe 109 is higher than the preset water temperature. The second control unit is configured to control the controlled three-way valve 105 to enter the first state, control the fan to supply air in the fourth air supply mode, and start the water pump 111 if the room temperature is lower than the preset room temperature, the water using device uses hot water, and the water temperature of the water outlet pipe 109 is higher than the preset water temperature.
Specific limitations regarding the control device of the gas water heater 100 can be found in the above limitations regarding the control method of the gas water heater 100, which are not described herein again. The various modules in the control device of the gas water heater 100 described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps in the control method of any of the gas water heaters 100 described above.
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 hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A control method of a gas water heater is characterized in that the gas water heater comprises a fan, a heat exchanger, a combustion system, a controlled three-way valve, a water inlet pipe, a water outlet pipe and a water pump, the fan is used for supplying air to the heat exchanger and the combustion system, the combustion system is used for heating water flow in the heat exchanger, the water inlet pipe is connected with a water inlet of the heat exchanger, the water outlet pipe is connected with a water outlet of the heat exchanger, a hot water inlet end of the controlled three-way valve is communicated with the water outlet pipe, a hot water outlet end of the controlled three-way valve is used for outputting hot water to a water using device, a water return end of the controlled three-way valve is connected with the water inlet pipe, and the water pump is used for pumping water flow to the heat exchanger, and the control method comprises the following steps:
if the water using device uses hot water and the water temperature of the water outlet pipe is higher than the preset water temperature, controlling the controlled three-way valve to enter a first state, controlling the fan to supply air in a first air supply mode, and starting the water pump; when the controlled three-way valve is in the first state, the hot water outlet end of the controlled three-way valve is cut off, and the water flow of the water outlet pipe flows back to the heat exchanger through the hot water inlet end and the water return end of the controlled three-way valve;
after the fan supplies air in a first air supply mode, if the water temperature of the water outlet pipe is reduced to a preset water temperature, the controlled three-way valve is controlled to enter a second state, the fan is controlled to supply air in a second air supply mode, and the combustion system is controlled to start combustion; when the controlled three-way valve is in the second state, the water return end of the controlled three-way valve is cut off, and water of the water outlet pipe flows out through the hot water inlet end and the hot water outlet end of the controlled three-way valve.
2. The control method of a gas water heater according to claim 1, characterized in that the control method comprises:
if the water using device uses hot water and the water temperature of the water outlet pipe is lower than a preset water temperature, controlling the controlled three-way valve to enter the first state, controlling the fan to supply air in a third air supply mode, and starting the water pump;
and after the fan supplies air in a third air supply mode, controlling the fan to supply air in a second air supply mode and controlling the combustion system to start combustion, and controlling the controlled three-way valve to enter the second state when the water temperature of the water outlet pipe is increased to a preset water temperature.
3. The control method of a gas water heater according to claim 1, characterized in that the control method comprises:
if the hot water device uses hot water, acquiring the water flow in a water path formed by the water inlet pipe, the water outlet pipe and the heat exchanger;
and if the water flow is smaller than the preset water flow, judging that water leakage occurs in the gas water heater.
4. The control method of a gas water heater according to claim 1, further comprising:
acquiring the water pressure of a hot water outlet end of the controlled three-way valve;
and if the difference value between the water pressure and the initial water pressure is greater than a preset pressure value, judging that the water using device uses hot water.
5. The control method of the gas water heater according to claim 1, wherein if the water using device uses hot water and the water temperature of the water outlet pipe is higher than a preset water temperature, the controlled three-way valve is controlled to enter a first state, the fan is controlled to supply air in a first air supply mode, and the step of starting the water pump comprises the steps of:
acquiring the room temperature at the setting position of the gas water heater;
if the room temperature is greater than the preset room temperature, the water using device uses hot water, and the water temperature of the water outlet pipe is higher than the preset water temperature, the controlled three-way valve is controlled to enter a first state, the fan is controlled to supply air in a first air supply mode, and the water pump is started;
if the room temperature is lower than the preset room temperature, the water using device uses hot water, and the water temperature of the water outlet pipe is higher than the preset water temperature, the controlled three-way valve is controlled to enter a first state, the fan is controlled to supply air in a fourth air supply mode, and the water pump is started; and the output power of the fan in the fourth air supply mode is smaller than that of the fan in the first air supply mode.
6. A gas water heater, comprising:
a heat exchanger;
a combustion system for heating the water stream within the heat exchanger;
a fan for supplying air to the heat exchanger and the combustion system;
the water inlet pipe is connected with the water inlet of the heat exchanger;
the water outlet pipe is connected with a water outlet of the heat exchanger;
the water temperature sensor is arranged on the water outlet pipe and used for collecting the water temperature of the water outlet pipe;
a water pump for pumping a flow of water to the heat exchanger;
the hot water inlet end of the controlled three-way valve is communicated with the water outlet pipe, the hot water outlet end of the controlled three-way valve is used for outputting hot water to a water using device, and the water return end of the controlled three-way valve is connected with the water inlet pipe; when the controlled three-way valve is in a first state, the hot water outlet end of the controlled three-way valve is cut off, and the water flow of the water outlet pipe flows back to the heat exchanger through the hot water inlet end and the water return end of the controlled three-way valve; when the controlled three-way valve is in a second state, the water return end of the controlled three-way valve is cut off, and water in the water outlet pipe flows out through the hot water inlet end and the hot water outlet end of the controlled three-way valve;
the controller is connected with the combustion system, the fan, the water temperature sensor, the controlled three-way valve and the water pump, and is used for controlling the controlled three-way valve to enter the first state, controlling the fan to supply air in a first air supply mode and starting the water pump if the water using device uses hot water and the water temperature of the water outlet pipe fed back by the water temperature sensor is higher than a preset water temperature; and after the fan supplies air in a first air supply mode, if the water temperature of the water outlet pipe is reduced to a preset water temperature, controlling the controlled three-way valve to enter a second state, and controlling the fan to supply air in a second air supply mode and controlling the combustion system to start combustion.
7. The gas water heater of claim 6, further comprising a constant temperature water tank disposed on the outlet pipe for reducing fluctuations in water temperature of water flowing into the controlled three-way valve; the water temperature sensor is arranged between the hot water inlet end of the controlled three-way valve and the water outlet of the constant-temperature water tank.
8. The gas water heater of claim 6, further comprising a water flow sensor for sensing water flow within a waterway formed by the inlet pipe, the outlet pipe, and the heat exchanger;
the controller is connected with the water flow sensor and used for acquiring the water flow fed back by the water flow sensor if the hot water device uses hot water, and judging that water leakage occurs in the gas water heater if the water flow is smaller than a preset water flow.
9. The gas water heater of claim 6, further comprising a pressure sensor for collecting a water pressure at a hot water outlet of the controlled three-way valve;
the controller is connected with the pressure sensor and used for obtaining the water pressure fed back by the pressure sensor and judging that the water using device uses hot water if the difference value between the water pressure and the initial water pressure is larger than a preset pressure value.
10. The gas water heater of claim 6, further comprising a room temperature sensor for acquiring a room temperature at a location where the gas water heater is disposed;
the controller is connected with the room temperature sensor and is used for acquiring the room temperature fed back by the room temperature sensor; if the room temperature is greater than the preset room temperature, the water using device uses hot water, and the water temperature of the water outlet pipe is higher than the preset water temperature, the controlled three-way valve is controlled to enter a first state, the fan is controlled to supply air in a first air supply mode, and the water pump is started; the water supply device is also used for controlling the controlled three-way valve to enter a first state, controlling the fan to supply air in a fourth air supply mode and starting the water pump if the room temperature is lower than the preset room temperature, the water supply device uses hot water and the water temperature of the water outlet pipe is higher than the preset water temperature; and the output power of the fan in the fourth air supply mode is smaller than that of the fan in the first air supply mode.
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| CN113465186B (en) | 2023-01-03 |
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