CN117287853A - Control method of zero cold water gas water heater - Google Patents

Abstract

The invention discloses a control method of a zero-cooling water gas water heater. The control method comprises the following steps: a zero cold water mode; and under the execution of the zero cooling water mode, the zero cooling water pipe, the water storage container, the circulating pump, the heat exchanger and the water outlet pipe are sequentially communicated and the circulating pump and the electric heating component are started, water input by the zero cooling water pipe is sequentially output to an external circulating pipeline from the water outlet pipe through the water storage container and the heat exchanger, and the electric heating module heats water flowing through the water storage container until the water temperature at the inlet of the water storage container reaches a first set temperature value T1. The method reduces energy consumption and improves user experience of the zero-cold water gas water heater.

Description

Control method of zero cold water gas water heater

Technical Field

The invention belongs to the technical field of household appliances, and particularly relates to a control method of a zero-cooling water gas water heater.

Background

At present, the water heater is a household appliance commonly used in daily life of people. The water heater is classified into a zero-cooling water gas water heater, an electric water heater and the like, wherein the zero-cooling water gas water heater is widely used because of convenient use. Conventional zero-cold water gas water heaters typically include a burner that combusts gas within the combustion chamber to heat water flowing through the heat exchanger, a combustion chamber, and a heat exchanger.

In the prior art, the gas water heater with the zero cold water function is widely popularized and used, and the zero cold water gas water heater is usually arranged in a kitchen, so that the requirement of hot water for the kitchen can be met, and the requirement of hot water for bathing of a user can be met. However, in the actual use process, the user can frequently use water in the kitchen to trigger the frequent starting of the burner of the zero cold water gas water heater; moreover, in the process of frequently starting and stopping water, the zero cold water gas water heater can be further triggered to start the zero cold water mode, so that on one hand, the gas consumption is high, the energy consumption is high, and on the other hand, the burner is started to generate large noise, so that the user experience is poor.

In view of this, it is an object of the present invention to design a technology for reducing the effects of energy consumption and noise to improve the user experience.

Disclosure of Invention

The invention provides a control method of a zero-cold water gas water heater, which can reduce energy consumption and improve user experience of the zero-cold water gas water heater.

In order to achieve the technical purpose, the invention is realized by adopting the following technical scheme:

in one aspect, the invention provides a control method of a zero-cooling water gas water heater, comprising the following steps: the gas water heater is provided with a water outlet pipe, a water inlet pipe and a zero-cooling water pipe, and comprises a burner, a heat exchanger and an electric heating module, wherein the electric heating module comprises a circulating pump, an electric heating part and a water storage container;

the control method comprises the following steps: a zero cold water mode;

and under the execution of the zero cooling water mode, the zero cooling water pipe, the water storage container, the circulating pump, the heat exchanger and the water outlet pipe are sequentially communicated and the circulating pump and the electric heating component are started, water input by the zero cooling water pipe is sequentially output to an external circulating pipeline from the water outlet pipe through the water storage container and the heat exchanger, and the electric heating module heats water flowing through the water storage container until the water temperature at the inlet of the water storage container reaches a first set temperature value T1.

Through configuration electrical heating module, the water storage container that electrical heating module configured can satisfy the requirement of carrying out the inner loop when suspending water, in addition, in the use, can utilize the electrical heating part to carry out instant heating treatment to the water in the water storage container to the electrical heating module that configures, like this, under the scene that water consumption such as kitchen is less, only need start the electrical heating module and supply with hot water and need not frequently start the combustor, on the one hand can effectually reduce because frequent start and lead to the gas consumption great, on the other hand because utilize the electrical heating part to heat the water in the water storage container, can realize silence heating, with the reduction combustor frequent start produces great noise, and then reduced energy consumption and noise influence in order to improve user experience nature. Moreover, the circulating heating requirement of the zero cold water can be realized through the electric heating component without frequent burners, so that the energy consumption and the noise are further reduced.

In an embodiment of the present application, the control method further includes:

in the normal water use process after the zero cold water mode is finished, after water is stopped, the heat exchanger, the water storage container and the circulating pump are sequentially communicated and the circulating pump is started, so that water between the heat exchanger and the water storage container circularly flows until the water temperature at the outlet of the water storage container reaches a second set temperature value T2.

In this application an embodiment, heat exchanger, water storage container and circulating pump communicate in proper order and start the circulating pump, specifically do:

after the normal water use time exceeds the first set time t1, the circulating pump is started after water use is suspended.

In this application an embodiment, heat exchanger, water storage container and circulating pump communicate in proper order and start the circulating pump, specifically do:

when the starting operation time of the circulating pump exceeds the second set time T2 and the water temperature at the outlet of the water storage container does not reach the second set temperature value T2, starting the burner until the water temperature at the outlet of the water storage container reaches the third set temperature value T3, and then stopping the burner and continuously operating the circulating pump until the water temperature at the outlet of the water storage container reaches the second set temperature value T2;

wherein T2> T3.

In an embodiment of the present application, in a normal water use process after the execution of the zero-cold water mode is finished, after the water consumption is suspended for more than a third set time t3, if the water temperature at the outlet of the water storage container is lower than a set starting water temperature value Ts, the zero-cold water mode is executed again;

wherein t3> t2; t3> Ts; t1> Ts.

In an embodiment of the present application, the burner is turned off and the circulation pump continues to operate until the water temperature at the outlet of the water storage container reaches the second set temperature value T2, specifically:

when the burner is turned off and the circulating pump continuously operates, if the water temperature at the outlet of the heat exchanger is higher than a fourth set temperature value T4 and the water temperature at the outlet of the water storage container is higher than T2, a flow path between the outlet of the heat exchanger and the inlet of the water storage container is disconnected, and the flow path between the zero cold water pipe and the inlet of the water storage container is communicated; after the length of the circulating pump is longer than the fourth time T4 when the circulating pump is started to run, the circulating pump is communicated with a flow path between the outlet of the heat exchanger and the inlet of the water storage container, and the flow path between the zero cold water pipe and the inlet of the water storage container is disconnected, and the circulating pump continuously runs until the water temperature at the outlet of the heat exchanger is lower than T5 and the water temperature at the outlet of the water storage container is higher than T2;

wherein t3> t4; t4> T5> T2.

In this application an embodiment, after the user pauses water, heat exchanger, water storage container and circulating pump communicate in proper order and start the circulating pump, specifically:

if the time length of the circulating pump during starting operation is longer than the sixth time length T6, after the water temperature at the outlet of the water storage container does not reach the second set temperature value T2, starting the electric heating component in the electric heating module to perform auxiliary heating until the water temperature at the outlet of the water storage container reaches the second set temperature value T2.

In an embodiment of the present application, the control method further includes:

when water is reused after the water temperature at the outlet of the water storage container reaches the second set temperature value T2, the burner is started after a seventh time period T7.

In an embodiment of the present application, in a zero cold water mode executed for the first time after each start-up of the gas water heater, the burner is started until the water temperature at the outlet of the water storage container reaches a first set temperature value T1;

and/or in the zero cold water mode, if the water temperature at the outlet of the water storage container does not reach the first set temperature value T1 after the circulating pump is started to run for longer than the fifth time T5, starting the burner until the water temperature at the outlet of the water storage container reaches the first set temperature value T1.

In an embodiment of the present application, the control method further includes: a first water mode and a second water mode;

in the first water mode, after water is started, the electric heating module is electrified and started to heat water in the water storage container for instant heating type water supply, and at the moment, the burner is not started;

in the second water mode, after water is started, the burner is started to heat water flowing in the heat exchanger.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic diagram of a zero-cold water gas water heater according to an embodiment of the present invention;

FIG. 2 is a schematic view of a part of the structure of FIG. 1;

FIG. 3 is a schematic diagram of a zero-cold water gas water heater according to another embodiment of the present invention;

FIG. 4 is a schematic view of the partial structure of FIG. 3;

FIG. 5 is a schematic view of the water storage container in the embodiment of the zero-cold water gas water heater of the present invention;

FIG. 6 is a cross-sectional view of the water reservoir of FIG. 5;

FIG. 7 is an exploded view of the water reservoir of FIG. 5;

fig. 8 is an assembly view of the electrical heating element of fig. 7.

Reference numerals illustrate:

1. a housing; 11. a water inlet pipe; 12. a water outlet pipe; 13. zero cooling water pipe; 14. a servo proportional valve; 15. a fuel gas inlet pipe; 16. a second electrically controlled valve;

2. a combustion chamber;

3. a heat exchanger;

41. a first water pipe; 42. a second water pipe; 43. a first electrically controlled valve;

5. an electric heating module; 51. an electric heating member; 52. a water storage container; 53. a circulation pump;

511. a straight pipe section; 512. a helical section; 521. a first connection pipe; 522. a second connection pipe; 523. and a blow-down pipe.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The zero cold water gas water heater is a water heater which adopts gas as a main energy material, and the high-temperature heat generated by combustion of the gas is transferred to cold water flowing through a heat exchanger so as to achieve the purpose of preparing hot water.

The zero-cooling water gas water heater generally comprises a shell, a burner, a heat exchanger, a fan cover and the like which are arranged in the shell.

The gas is conveyed to the burner, and is ignited by the ignition device, so that the burner combusts the conveyed gas, and heat is further generated.

The heat exchanger is internally provided with a heat exchange tube, one end of the heat exchange tube is communicated with a water supply pipeline, and the other end of the heat exchange tube is communicated with a shower head or a tap and the like.

The heat generated by the combustion of the fuel gas by the burner is used for heating the heat exchange tube so as to raise the water temperature in the heat exchange tube to form hot water.

When the zero cold water gas water heater works, cold water provided by the water supply pipeline flows into the heat exchange pipe, is heated into hot water by the heating source generated by the burner, and flows out of the shower head or the water tap through the hot water valve for users to use.

Meanwhile, in the operation of the zero-cooling water gas water heater, the fans are electrified and run simultaneously, and under the action of the fans, the flue gas generated by the burner is discharged outdoors.

Heat generated by combustion of the fuel gas during operation of the burner is conducted to the housing in order to reduce heat transfer.

First embodiment as shown in fig. 1 to 8, the present embodiment provides a zero cold water gas water heater, which includes a housing 1, and a combustion chamber 2, a burner, and a heat exchanger 3 provided in the housing 1. The shell 1 is provided with a water inlet pipe 11, a water outlet pipe 12 and a zero cooling water pipe 13.

Wherein an electric heating module 5 is arranged in the housing 1, the electric heating module 5 comprises a circulating pump 53, an electric heating component 51 and a water storage container 52, the electric heating component 51 is arranged on the water storage container 52 and is configured to electrify and heat water in the water storage container 52, and an inlet of the circulating pump 53 is communicated with an outlet of the water storage container 52;

wherein, the outlet of the heat exchanger 3 is communicated with the water outlet pipe 12, the outlet of the heat exchanger 3 is also selectively communicated with the inlet of the water storage container 52, the inlet of the heat exchanger 3 is communicated with the outlet of the circulating pump 53, and the inlet of the water storage container 52 is respectively communicated with the water inlet pipe 11 and the zero-cooling water pipe 13.

Specifically, the electric heating module 5 is configured with a water storage container 52, and the water storage container 52 can heat the water in the water storage container 52 through the electric heating component 51 so as to meet the requirement of instant heating type water supply under the condition of small flow.

In the use process, when a user needs a large amount of hot water in bath and the like, the zero cold water gas water heater is normally started to burn gas through the burner to heat the water flowing through the heat exchanger 3.

When a user needs a small amount of hot water in kitchen water, on the one hand, the flow rate of the hot water is small, and on the other hand, the user frequently turns on and off to use the hot water, at this time, the electric heating module 5 can be started to heat the water in the water storage container 52 so as to realize the requirement of instant heating type water supply.

In the process, the burner in the zero cold water gas water heater is not started, and only the heat generated by electrifying and heating the electric heating component 51 in the electric heating module 5 is used for heating the water in the water storage container 52, so that the heat generated by the electric heating component 51 in the electric heating module 5 meets the requirement of instant heating with smaller water flow.

In the use process of a user, when the phenomenon of short-time water cut-off in the water using process occurs, the water temperature is increased due to the waste heat of the heat exchanger 3.

In order to achieve the requirement of reducing the temperature rise of the secondary boiled water to increase the constant temperature of the outlet water, the outlet of the heat exchanger 3 may be selectively communicated with the inlet of the water storage container 52.

When the water is stopped in a short time in the water using process, the outlet of the heat exchanger 3 is communicated with the inlet of the water storage container 52. At this time, the heat exchanger 3, the water storage container 52, and the circulation pump 53 are connected in this order to form an internal circulation flow path.

Specifically, in the water consumption process of the user, when the user turns off water briefly, the water in the heat exchanger 3 is heated up due to the residual heat in the combustion chamber 2, so that the circulating pump 53 can be started, and the cold water in the water storage container 52 circularly flows into the heat exchanger 3 to absorb the residual heat, so that the requirement of smaller fluctuation of the water outlet temperature of boiled water in the next time is met.

In order to meet the requirement of flow restriction control, a servo proportional valve 14 is connected in series to a flow path between the water inlet pipe 11 and the heat exchanger 3, and the water inlet flow of the heat exchanger 3 is automatically regulated by the servo proportional valve 14.

In addition, in the actual control process of the zero-cold water gas water heater, a trigger component for triggering the electric heating module 5 to start so as to realize instant heating type hot water supply can be configured on the zero-cold water gas water heater. When the trigger part is triggered during the use of the user, the electric heating module 5 starts to perform heating of water, so that after the user turns on the faucet, the electric heating module 5 starts the instant heating type water supply mode, and in the instant heating type water supply mode, the water inflow is controlled through the servo proportional valve 14.

The triggering component may be a switch arranged on the zero cold water gas water heater, or other components capable of triggering the zero cold water gas water heater to perform mode switching, which is not limited and described herein.

The servo proportional valve 14 generally performs servo adjustment according to the outlet water temperature detected by a temperature sensor disposed on the outlet pipe 12 for adjusting the inlet water amount, for example, when the outlet water temperature of the outlet pipe 12 is higher than a set outlet water temperature, the servo proportional valve 14 increases the inlet water amount; conversely, when the outlet water temperature of the outlet pipe 12 is lower than the set outlet water temperature, the servo proportional valve 14 reduces the inlet water flow. The specific control procedure is not limited and described in detail herein.

Through configuration electrical heating module, the water storage container 52 that electrical heating module disposes can satisfy the requirement of carrying out the inner loop when suspending water, in addition, in the use, can utilize the electrical heating part to carry out instant heating treatment to the water in the water storage container to the electrical heating module that disposes, in this way, under the scene that water consumption such as kitchen is less, only need start electrical heating module and supply hot water and need not frequently start the combustor, on the one hand can effectual reduction because frequent start leads to the gas consumption great, on the other hand because utilize the electrical heating part to heat the water in the water storage container, can realize silence heating, in order to reduce the frequent start of combustor and produce great noise, and then reduced energy consumption and noise influence in order to improve user experience nature.

In an embodiment of the present application, regarding the installation position of the relevant components in the housing 1, in order to meet the design requirement of the compact structure and the design requirement of the flow path, the following structural design is performed for the installation position of the water storage container 52.

As shown in fig. 1 and 2, the water storage container 52 is disposed at one side of the inside of the housing 1 and above the water outlet pipe 12.

Specifically, the water storage container 52 is disposed below the combustion chamber 2 and the water storage container 52 is placed by making full use of the space of the housing 1 on both sides below the combustion chamber 2.

Alternatively, as shown in fig. 3 and 4, the water storage container 52 is disposed at one side of the inside of the housing 1 above the water inlet pipe 11.

Meanwhile, in order to meet the requirement of gas supply, the housing 1 of the zero-cold water gas water heater is further provided with a gas inlet pipe 15, and the gas inlet pipe 15 is used for supplying gas to the burner in the combustion chamber 2 for combustion. In order to facilitate the running of the air supply pipeline in the shell 1, the gas inlet pipe 15 is arranged at one side of the water storage containers 52, so that the gas inlet pipe 15 can be provided with a gas path through the space between the water storage containers 52.

In another embodiment of the present application, the water storage container 52 is provided with a first connection pipe 521 and a second connection pipe 522, a water outlet of the first connection pipe 521 is disposed at the bottom of the water storage container 52, and a water inlet of the second connection pipe 522 is disposed at the top of the water storage container 52.

Specifically, in order to improve the temperature constant of the water temperature output from the water storage container 52 and the hot water output rate, the water introduced into the water storage container 52 is transferred to the bottom of the water storage container 52 through the first connection pipe 521. After the water outputted from the first connection pipe 521 flows into the bottom of the water storage container 52, so that the water at the bottom can be heated from the bottom of the water storage container 52, and the water in the water storage container 52 is uniformly heated by using the principle of rising hot water.

Meanwhile, by disposing the water outlet of the first connection pipe 521 at the bottom of the water storage container 52, during heating of the water in the heat exchanger 3 by the burner to input hot water to the water storage container 52 through the first connection pipe 521. Since a certain amount of water is stored in the water storage container 52, even if the water temperature outputted from the heat exchanger 3 fluctuates, the water flowing into the water storage container 52 through the first connection pipe 521 can be mixed with the water stored in the water storage container 52, so that the fluctuation range of the water outlet temperature of the water outlet pipe 12 can be effectively reduced, and the user experience can be improved.

In another embodiment of the present application, a first mounting hole and a second mounting hole are provided at the top of the water storage container 52, the first connecting pipe 521 is inserted into the first mounting hole, and the lower end of the first connecting pipe 521 extends to the bottom of the water storage container 52; the water inlet of the second connecting pipe 522 is connected to the second mounting hole.

Specifically, in order to facilitate the installation of the first connection pipe 521 and the second connection pipe 522, the water storage container 52 is provided with installation holes to meet the installation requirements of the connection pipes. Wherein, for the first connection pipe 521, a first mounting hole is provided at the top of the water storage container 52, and the lower end of the first connection pipe 521 is inserted into the first mounting hole and extends to the bottom of the water storage container 52. In this way, the upper end of the first connection pipe 521 is exposed to the top of the water storage container 52 to facilitate the connection of the pipe with the heat exchanger 3 at the top. The second connection pipe 522 is connected in the second mounting hole of the top to satisfy the water output from the water storage container 52.

In another embodiment, in order to improve the electric heating efficiency of the electric heating component to meet the heating requirement of increasing the water flow, the electric heating component comprises a first electric heating pipe 501 and a second electric heating pipe 502, wherein the first electric heating pipe and the second electric heating pipe are in a spiral structure, and the first electric heating pipe is sleeved outside the second electric heating pipe;

the first electric heating pipe and the second electric heating pipe are arranged in the water storage container, and the connecting terminals of the first electric heating pipe and the connecting terminals of the second electric heating pipe extend out of the water storage container.

Specifically, two electric heating pipes with spiral structures are assembled into the electric heating component 51, and the electric heating pipes are in spiral structures so as to increase the contact area between the electric heating pipes and water. Meanwhile, the first electric heating pipe 501 is sleeved outside the second electric heating pipe 502, so that the requirement of the overall compact design of the electric heating component is met, and the electric heating component can be further installed in the water storage container 52.

In order to improve the safety and reliability, the water storage container 52 is further provided with a protecting cover 524, which covers the connecting terminal of the first electric heating pipe 501 and the connecting terminal of the second electric heating pipe 502.

In some embodiments, the first electric heating tube comprises two first straight tube sections 5112 and a first spiral section 5111 connected between the two first straight tube sections;

the second electric heating tube comprises two second straight tube sections 5122 and a second spiral section 5121, wherein the second spiral section is connected between the two second straight tube sections;

the first spiral section is sleeved outside the second spiral section, the first spiral section and the second spiral section are located inside the water storage container, and the first straight pipe section and the second straight pipe section extend out of the water storage container and are respectively provided with a connecting terminal.

Specifically, taking the first electric heating tube 511 as an example, the first spiral section 5111 has a spiral structure to perform a main heating function, and the first straight tube section 5112 performs a supporting and circuit connection function.

In order to achieve a compact design, one of the straight tube sections passes through the space formed around the second spiral section.

In another embodiment, the second spiral section and the first spiral section are arranged in a staggered manner, and a turbulent flow channel is formed between the second spiral section and the first spiral section.

Specifically, the water in the water storage container is input through the first connecting pipe and output through the second connecting pipe, so that the water input through the first connecting pipe can be heated uniformly by the electric heating component 51 sufficiently to improve the output rate of hot water, and the second spiral section 5121 located in the space formed by the first spiral pipe section 5111 is arranged in a staggered manner. When the water flows from the first connection pipe to the second connection pipe along the central line direction of the water storage container, projections of the first spiral pipe section 5111 and the second spiral section 5121 perpendicular to the central line direction of the water storage container are alternately arranged.

In this way, in the process that the water flows through the first spiral pipe section 5111 and the second spiral pipe section 5121, the water flow can be alternately blocked by the first spiral pipe section 5111 and the second spiral pipe section 5121 to play a role of turbulence, so that the water in the water storage container 52 can be fully mixed and heated uniformly, the output rate of hot water is further improved, and the requirement of instant heating water flow is increased.

And in order to achieve sufficient heating uniformity, the second helical segment and the first helical segment are positioned between the water outlet of the first connection tube and the water inlet of the second connection tube.

In one embodiment, in order to meet the design requirement of compact and miniaturized structure, the water storage tank is transversely arranged in the shell; and/or the water storage container is transversely arranged in the shell.

Specifically, to two water storage containers that arrange in the shell, the bottom space in the shell needs to be fully utilized to install, and the bottom in the shell needs to satisfy inlet tube, outlet pipe and gas intake pipe, therefore the shell bottom can reserve certain space in the bottom of combustion chamber, and storage water tank and/or water storage container adopt the mode of transverse arrangement to install in the bottom of shell, can fully utilize the width direction of shell to install and satisfy the requirement of water storage container capacity, simultaneously, reduce because of increasing the increase that the water storage container leads to the whole height of shell, and then satisfy miniaturized and compact design requirement.

In some embodiments, the bottom of the water storage container is further provided with a switchable drain 523, said drain 523 extending to the outside of said housing 1.

Specifically, by disposing the drain pipe 523 at the bottom of the water storage container 52, dirt is easily accumulated at the bottom of the water storage container 52 after the water heater is used for a long period of time, and the dirt in the water storage container 5252 can be cleaned out by opening the drain pipe 523.

In another embodiment, for convenience in fixing the water storage container 52 in the housing 1, a mounting bracket 525 is further provided on the water storage container 5 to fix the water storage container 52 in the housing 1 through the mounting bracket 525.

In some embodiments, the outlet of the heat exchanger 3 is communicated with the water outlet pipe 12 through a first water pipe 41, the first water pipe 41 is also communicated with the inlet of the water storage container 52 through a second water pipe 42, a first electric control valve 43 is arranged on the second water pipe 42, and the first electric control valve 43 is configured to control the on-off of the second water pipe 42.

Specifically, the outlet of the water outlet pipe 12 and the outlet of the heat exchanger 3 are connected through the first water pipe 41, so that the water flow output from the outlet of the heat exchanger 3 flows into the water outlet pipe 12 through the first water pipe 41 to output hot water outwards through the water outlet pipe 12. In order to meet the requirement of internal circulation, the first water pipe 41 is further connected with the inlet of the water storage container 52 through the second water pipe 42, and the first electric control valve 43 arranged on the second water pipe 42 can switch on and off the second water pipe 42. Thus, when the internal circulation is required, the first electric control valve 43 opens the second water pipe 42 so that the heat exchanger 3, the first water pipe 41, the second water pipe 42, the water storage container 52 and the circulation pump 53 are sequentially communicated to form an internal circulation flow path.

In another embodiment, a second electrically controlled valve 16 is disposed on the zero-cooling water pipe 13, and the second electrically controlled valve 16 is configured to control on-off of the zero-cooling water pipe 13.

Specifically, for the zero-cold water gas water heater, the zero-cold water gas water heater has a zero-cold water function, the shell 1 is provided with a zero-cold water pipe 13, the zero-cold water pipe 13 is provided with a second electric control valve 16, and the second electric control valve 16 is configured to control the on-off of a flow path between the zero-cold water pipe 13 and an inlet of a water storage container.

In the zero cold water mode, the water in the external water pipe is heated by the zero cold water gas water heater, namely, the external circulation is realized. In the internal circulation mode, the water circulation heating in the water path inside the casing 1 is to be realized. By arranging the second electric control valve 16 on the zero-cooling water pipe 13, when internal circulation is performed, the second electric control valve 16 closes the zero-cooling water pipe 13, so that water in the external water pipe cannot enter the water storage container 52 through the zero-cooling water pipe 13 after the circulating pump 53 is started, and the water temperature adjusting efficiency of the internal circulation is improved.

In a second embodiment, referring to fig. 1, the invention further provides a control method of the zero-cold water gas water heater, wherein the zero-cold water gas water heater has a first water mode and a second water mode;

in the first water mode, after water is started, the electric heating module 5 is electrified and started to heat the water in the water storage container 52 for instant heating type water supply, and at the moment, the burner is not started;

in the second water mode, after the water is started, the burner starts heating the water flowing in the heat exchanger 3.

Specifically, in the first water mode, taking kitchen water as an example, in a kitchen water scene, the required temperature and flow rate of hot water are lower than the requirements of bath water for a user on water temperature and flow rate. Therefore, the first water mode is started, in this mode, the electric heating module 5 will start to operate, after the user opens the faucet, the water flowing into the water inlet pipe 11 enters the water storage container 52 through the heat exchanger 3, and the water in the water storage container 52 is quickly heated by the electric heating component 51, so as to realize instant heating type water supply, and further meet the water demand of water scenes such as kitchen.

In the second water use mode, taking bath water as an example, the water temperature and water flow rate are required to be higher. At this time, the burner is started to burn, and the normal zero cold water gas water heater is operated to heat water.

In a certain embodiment, in order to meet the requirement of rapid water consumption of a user, in the second water consumption mode, after the user starts water consumption, the electric heating module 5 and the burner are started simultaneously, and after the water outlet temperature of the heat exchanger 3 reaches a set water outlet temperature value, the electric heating module 5 is powered off to stop running. Therefore, the output quantity of cold water at the initial stage of water consumption of a user can be reduced, so that the requirement of the user for quickly obtaining hot water is met.

In another embodiment of the present application, the control method of the zero cold water gas water heater further includes: zero cold water mode.

In the zero-cold water mode, the second water pipe 42 is closed and the circulation pump 53 and the electric heating unit 51 are started, and the water inputted from the zero-cold water pipe 13 is sequentially outputted from the water outlet pipe 12 to the external circulation line via the water storage container 52 and the heat exchanger 3, and the electric heating module 5 heats the water flowing through the water storage container 52 until the water temperature at the inlet of the water storage container 52 reaches the first set temperature value T1.

Specifically, since the zero-cooling water gas water heater is provided with the electric heating module 5, the water in the external pipeline can be circularly heated by the heat generated by electric heating of the electric heating module 5 under the zero-cooling water mode. In this process, the electric heating module 5 can be used to perform the heating water requirement in the zero cold water mode under the condition that the water storage amount and the water temperature lifting amount in the external pipeline are not high, so that the burner can be not started to reduce the running noise.

In another embodiment, the heating power of the electric heating module 5 is limited, and when the water storage amount in the external pipeline and the water temperature increase amount are high, the electric heating module 5 cannot meet the requirement of zero cold water heating, and further depends on the burner to heat the water flowing in the heat exchanger 3.

For this reason, in the zero cold water mode, if the water temperature at the outlet of the water storage container 52 does not reach the first set temperature value T1 after the circulation pump 53 is started to run for longer than the fifth time period T5, the burner is started until the water temperature at the inlet of the water storage container 52 reaches the first set temperature value T1.

Specifically, the specific control method of the zero-cold water gas water heater in starting the burner to perform the zero-cold water heating function may refer to the control process of the zero-cold water gas water heater in the conventional technology to perform the zero-cold water mode, which is not limited herein.

While in the zero cold water mode, the second water line 42 needs to be shut down, the circulation pump 53 is started, and the burner and/or the electric heating module 5 is started. The water input by the zero cooling water pipe 13 enters the heat exchanger 3 through the water storage container 52 for heating, and the water output by the heat exchanger 3 firstly enters the water storage container 52 and then is output to an external circulation pipeline through the water outlet pipe 12.

In the normal water use process after the zero cold water mode is finished, the situation that the user turns off water briefly and restarts exists. At this time, in order to avoid that the temperature of the water inside increases too much due to the waste heat in the heat exchanger 3, the internal circulation mode may be performed.

After the water is suspended, the inner loop mode is performed. In the internal circulation mode, the second water pipe 42 is opened and the circulation pump 53 is started, so that the water between the heat exchanger 3 and the water storage container 52 circulates until the water temperature at the outlet of the water storage container 52 reaches the second set temperature value T2.

After the zero cold water and zero cold water gas water heater executes the zero cold water mode, a user can use hot water to bath. There are situations where the user temporarily shuts down the water during the use of hot water. In this process, the conventional technology will execute the zero-cooling water mode again because the water temperature at the water inlet pipe 11 is low, but the water temperature at the water outlet pipe 12 and the water temperature in the water terminal pipeline of the user are still high, and the frequent start of the zero-cooling water mode will cause the increase of energy consumption.

For this reason, when the user temporarily turns off the water during the use of the hot water, an internal circulation mode may be performed, i.e., the second water pipe 42 is opened and the circulation pump 53 is started so that the water between the heat exchanger 3 and the water storage container 52 flows circularly, and thus, cold water in the water storage container 52 is circulated into the heat exchanger 3 to absorb the residual heat of the heat exchanger 3, thereby avoiding excessive fluctuation in the temperature of the water discharged due to the temperature rise of the residual heat of the heat exchanger 3. Meanwhile, after the user starts again, the burner is started for a certain time, and the hot water in the water storage container 52 can flow into the heat exchanger 3 and finally be output, so that the condition that the cold water enters the heat exchanger 3 and is not heated and is output from the water outlet pipe 12 in the conventional technology, and the fluctuation of the temperature of the water outlet is overlarge is avoided.

In the internal circulation mode, if the water temperature at the outlet of the water storage container 52 does not reach the second set temperature value T2 after the circulation pump 53 is started to run for longer than the sixth time T6, the electric heating unit 51 in the electric heating module 5 is started to perform auxiliary heating. In this way, it can be more beneficial to ensure that the water outlet pipe 12 can output constant-temperature hot water after the user uses water again, so as to improve the use experience of the user.

In some embodiments, to avoid frequent initiation of the internal circulation during use, after the user pauses the use of water, the second water line 42 is opened and the circulation pump 53 is started, specifically:

after the normal water use time exceeds the first set time t1, after the water use is suspended, the second water pipe 42 is opened and the circulation pump 53 is started.

Specifically, in the water consumption process of the user, if the water consumption time exceeds the set first set time t1, at this time, after the water consumption of the user is finished and the water is closed, the zero-cold water gas water heater can trigger to execute the internal circulation mode, so that the waste of extra energy consumption caused by frequent starting of the internal circulation mode in the frequent starting and stopping water consumption process of the user can be avoided.

In another embodiment, the second water pipe 42 is opened and the circulation pump 53 is started, specifically: when the starting operation duration of the circulating pump 53 exceeds the second set time T2 and the water temperature at the outlet of the water storage container 52 does not reach the second set temperature value T2, starting the burner until the water temperature at the outlet of the water storage container 52 reaches the third set temperature value T3, and then shutting down the burner and continuously operating the circulating pump 53 until the water temperature at the outlet of the water storage container 52 reaches the second set temperature value T2; wherein T2> T3.

Specifically, in the internal circulation mode of the zero-cold water gas water heater, the operation time of the circulation pump 53 and the water outlet temperature of the water storage container 52 are determined to trigger the end of the internal circulation mode, that is, after the circulation pump 53 operates for more than the second set time T2 and the water temperature at the outlet of the water storage container 52 exceeds the second set temperature value T2, the internal circulation mode is ended, and the circulation pump 53 stops operating. Thus, the water inside the zero-cooling water and zero-cooling water gas water heater can be fully and circularly mixed uniformly.

In addition, when the water temperature at the outlet of the water storage container 52 does not reach the second set temperature value T2 due to the large amount of heat absorbed by the water temperature of the water storage container 52 during the execution of the internal circulation mode, the burner needs to be started to assist in heating the heat exchanger 3, and after the burner is started, the burner is stopped after detecting that the water temperature at the outlet of the water storage container 52 exceeds the third set temperature value T3, and the circulation pump 53 continues to operate to absorb the waste heat of the heat exchanger 3, so that the water temperature at the outlet of the water storage container 52 continuously rises until the water temperature exceeds the second set temperature value T2, and the circulation pump 53 is stopped.

In other embodiments, during normal water usage after the zero cold water mode is performed, after the water consumption is suspended for more than the third set time t3, if the water temperature at the outlet of the water storage container 52 is lower than the set start water temperature value Ts, the zero cold water mode is performed again;

wherein t3> t2; t3> Ts; t1> Ts.

Specifically, after the user turns off the water, whether or not the internal circulation mode is executed, after the water is suspended for more than the third set time t3, the temperature drop amplitude of the water in the pipeline between the water outlet pipe 12 and the water use terminal becomes large, and at this time, the zero cold water mode needs to be executed again.

In some embodiments, after shutting down the burner and the circulation pump 53 is continuously operated until the water temperature at the outlet of the water storage container 52 reaches the second set temperature value T2, specifically:

in the continuous operation process of turning off the burner circulation pump 53, if the water temperature at the outlet of the heat exchanger 3 is higher than the fourth set temperature value T4 and the water temperature at the outlet of the water storage container 52 is higher than T2, the second water pipe 42 is closed and the flow path between the zero-cooling water pipe 13 and the circulation pump 53 is opened first, after the circulation pump 53 is started to operate for longer than the fourth time T4, the second water pipe 42 is opened and the flow path between the zero-cooling water pipe 13 and the circulation pump 53 is closed, and the circulation pump 53 continues to operate until the water temperature at the outlet of the heat exchanger 3 is lower than T5 and the water temperature at the outlet of the water storage container 52 is higher than T2.

Wherein t3> t4; t4> T5> T2.

Specifically, in the internal circulation mode, when the burner is started to perform auxiliary heating, there is an excessive heat generated by the burner, which results in an excessive overall water temperature inside the internal circulation mode, and at this time, a certain amount of cold water can be introduced through the zero-cold water pipe 13 to further reduce the internal water temperature. That is, if the water temperature at the outlet of the heat exchanger 3 is higher than the fourth set temperature value T4 and the water temperature at the outlet of the water storage container 52 is higher than T2, the water temperature is too high due to excessive waste heat generated by the heat exchanger 3 when the burner is heated, at this time, the second water pipe 42 can be closed and the flow path between the zero-cooling water pipe 13 and the circulating pump 53 can be opened, a certain amount of cold water is introduced through the zero-cooling water pipe 13 under the action of the circulating pump 53, so that the overall water temperature of the internal circulating water is reduced, and finally, the fluctuation of the water outlet temperature when the user uses water again is smaller, thereby improving the user experience.

The specific values of the set temperature and the set time may be obtained by tests according to different models, and are not limited herein.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. The control method of the zero cold water gas water heater is characterized in that the gas water heater is provided with a water outlet pipe, a water inlet pipe and a zero cold water pipe, the gas water heater comprises a burner, a heat exchanger and an electric heating module, and the electric heating module comprises a circulating pump, an electric heating part and a water storage container;

the control method comprises the following steps: a zero cold water mode;

and under the execution of the zero cooling water mode, the zero cooling water pipe, the water storage container, the circulating pump, the heat exchanger and the water outlet pipe are sequentially communicated and the circulating pump and the electric heating component are started, water input by the zero cooling water pipe is sequentially output to an external circulating pipeline from the water outlet pipe through the water storage container and the heat exchanger, and the electric heating module heats water flowing through the water storage container until the water temperature at the inlet of the water storage container reaches a first set temperature value T1.

2. The control method of a gas water heater according to claim 1, further comprising:

in the normal water use process after the zero cold water mode is finished, after water is stopped, the heat exchanger, the water storage container and the circulating pump are sequentially communicated and the circulating pump is started, so that water between the heat exchanger and the water storage container circularly flows until the water temperature at the outlet of the water storage container reaches a second set temperature value T2.

3. The control method of a gas water heater according to claim 2, wherein the heat exchanger, the water storage container and the circulating pump are sequentially communicated and the circulating pump is started, specifically:

after the normal water use time exceeds the first set time t1, the circulating pump is started after water use is suspended.

4. The control method of a gas water heater according to claim 2, wherein the heat exchanger, the water storage container and the circulating pump are sequentially communicated and the circulating pump is started, specifically:

when the starting operation time of the circulating pump exceeds the second set time T2 and the water temperature at the outlet of the water storage container does not reach the second set temperature value T2, starting the burner until the water temperature at the outlet of the water storage container reaches the third set temperature value T3, and then stopping the burner and continuously operating the circulating pump until the water temperature at the outlet of the water storage container reaches the second set temperature value T2;

wherein T2> T3.

5. The control method of a gas water heater according to claim 4, wherein in the normal water use process after the zero cold water mode is performed, if the water temperature at the outlet of the water storage container is lower than the set start water temperature value Ts after the water use is suspended for more than the third set time t3, the zero cold water mode is re-performed;

wherein t3> t2; t3> Ts; t1> Ts.

6. The control method of a gas water heater according to claim 4, wherein the burner is turned off and the circulation pump continues to operate until the water temperature at the outlet of the water storage container reaches a second set temperature value T2, specifically:

when the burner is turned off and the circulating pump continuously operates, if the water temperature at the outlet of the heat exchanger is higher than a fourth set temperature value T4 and the water temperature at the outlet of the water storage container is higher than T2, a flow path between the outlet of the heat exchanger and the inlet of the water storage container is disconnected, and the flow path between the zero cold water pipe and the inlet of the water storage container is communicated; after the length of the circulating pump is longer than the fourth time T4 when the circulating pump is started to run, the circulating pump is communicated with a flow path between the outlet of the heat exchanger and the inlet of the water storage container, and the flow path between the zero cold water pipe and the inlet of the water storage container is disconnected, and the circulating pump continuously runs until the water temperature at the outlet of the heat exchanger is lower than T5 and the water temperature at the outlet of the water storage container is higher than T2;

wherein t3> t4; t4> T5> T2.

7. The control method of a gas water heater according to claim 2, wherein after the user pauses the water use, the heat exchanger, the water storage container and the circulation pump are sequentially connected and the circulation pump is started, specifically:

if the time length of the circulating pump during starting operation is longer than the sixth time length T6, after the water temperature at the outlet of the water storage container does not reach the second set temperature value T2, starting the electric heating component in the electric heating module to perform auxiliary heating until the water temperature at the outlet of the water storage container reaches the second set temperature value T2.

8. The control method of a gas water heater according to claim 2, characterized in that the control method further comprises:

when water is reused after the water temperature at the outlet of the water storage container reaches the second set temperature value T2, the burner is started after a seventh time period T7.

9. The control method of a gas water heater according to any one of claims 1 to 8, wherein in the case of initially executing the zero cold water mode after each start-up of the gas water heater, the burner is started until the water temperature at the outlet of the water storage container reaches a first set temperature value T1;

and/or in the zero cold water mode, if the water temperature at the outlet of the water storage container does not reach the first set temperature value T1 after the circulating pump is started to run for longer than the fifth time T5, starting the burner until the water temperature at the outlet of the water storage container reaches the first set temperature value T1.

10. The control method of a gas water heater according to any one of claims 1 to 8, further comprising: a first water mode and a second water mode;

in the first water mode, after water is started, the electric heating module is electrified and started to heat water in the water storage container for instant heating type water supply, and at the moment, the burner is not started;

in the second water mode, after water is started, the burner is started to heat water flowing in the heat exchanger.