Gas water heater and control method thereof

Abstract

The present invention discloses a gas water heater and a control method thereof, which relate to the field of water heating devices. The gas water heater includes a combustion device, wherein the combustion device includes a first group of burners and a second group of burners that can be independently turned on and off. The control method of the gas water heater includes: when a first preset condition is met, controlling the first group of burners to start burning and controlling the second group of burners to be in an off state; when the first preset condition is subsequently met, controlling the second group of burners to start burning and controlling the first group of burners to be in an off state, or controlling the second group of burners to start burning and controlling the first group of burners to be in an off state after the first group of burners has been turned on a first preset number of times. This application can solve the problem of easy failure caused by long-term heating of a local area of a heat exchanger, thereby improving the service life of the heat exchanger.

Description

Technical Field

[0001] The present invention relates to the field of water heating devices, and in particular to a gas water heater and a control method thereof. Background Art

[0002] Current gas water heaters typically utilize staged combustion. When a user first starts using water, the system ignites the same burner group, then determines whether to ignite other burner groups based on the required load. Because hot water supply at high loads is relatively rare, occurring only occasionally and for relatively short periods, most hot water heaters heat water at low or medium loads, compared to full load. Consequently, the burner group within the combustion system used for ignition is essentially always burning, and some burner groups near the ignition group are often burning, while the remaining burner groups are typically deactivated and have no gas supply. This results in the gas water heater always igniting the same burner group at low or medium loads. This results in the area of the heat exchanger corresponding to these burner groups being subjected to high heat intensity for extended periods, making scaling more likely and leading to failure. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a gas water heater and a control method thereof, which can solve the problem of easy failure caused by long-term heating of a local area of the heat exchanger, thereby improving the service life of the heat exchanger.

[0004] The specific technical solution of the embodiment of the present invention is:

[0005] A control method for a gas water heater, wherein the gas water heater comprises a combustion device, wherein the combustion device comprises a first group of burners and a second group of burners that can be independently started and stopped;

[0006] The control method of the gas water heater comprises:

[0007] When a first preset condition is met, the first group of burners is controlled to start combustion, and the second group of burners is controlled to be in a closed state;

[0008] When the first preset condition is subsequently met, the second group of burners is controlled to start burning and the first group of burners is controlled to be in a closed state, or after the first group of burners is turned on for a first preset number of times, the second group of burners is controlled to start burning and the first group of burners is controlled to be in a closed state.

[0009] Preferably, there is a preset distance between the first group of burners and the second group of burners.

[0010] Preferably, the first preset condition includes a received water usage signal from a user.

[0011] Preferably, when the user turns on water use, the first group of burners is controlled to start burning first; when the user turns on water use next time, the second group of burners is controlled to start burning first.

[0012] Preferably, when the number of times the first group of burners is first turned on and burned meets a first preset number, when the user turns on water use, the second group of burners is controlled to be first turned on and burned.

[0013] Preferably, the control method of the gas water heater further includes:

[0014] When the number of times the second group of burners are turned on and burned meets the second preset number, when the user turns on water use, the first group of burners is controlled to start burning first, and the second group of burners is controlled to be in an off state.

[0015] Preferably, the combustion device further comprises a third group of burners arranged between the first group of burners and the second group of burners, and the third group of burners can be ignited by the first group of burners or the second group of burners in a burning state.

[0016] Preferably, when a first preset condition is met, the first group of burners is controlled to start combustion first, and when the required load is greater than the load supplied by the first group of burners when combustion is started, the first group of burners is controlled to ignite the third group of burners;

[0017] When the first preset condition is subsequently met, the second group of burners is controlled to start combustion first. When the required load is greater than the load supplied by the second group of burners, the second group of burners is controlled to ignite the third group of burners.

[0018] Preferably, the gas water heater further comprises: at least two gas transmission channels that can be opened and closed independently, and the at least two gas transmission channels are respectively provided corresponding to the first group of burners and the second group of burners;

[0019] Controlling the first group of burners to start combustion specifically includes: opening a gas transmission channel corresponding to the first group of burners to start combustion of the first group of burners;

[0020] Controlling the second group of burners to start combustion specifically includes: opening the gas transmission channels corresponding to the second group of burners, and starting the second group of burners to burn.

[0021] Preferably, the combustion device further comprises a third group of burners arranged between the first group of burners and the second group of burners, and the third group of burners can be ignited by the first group of burners or the second group of burners in a burning state; the gas water heater further comprises: at least three gas transmission channels that can be independently opened and closed, and the at least three gas transmission channels are respectively arranged corresponding to the first group of burners, the second group of burners and the third group of burners;

[0022] When a first preset condition is met, the first group of burners is controlled to start combustion first. When the required load is greater than the load supplied by the first group of burners, the gas supply channel corresponding to the third group of burners is opened, so that the first group of burners ignites the third group of burners.

[0023] When the first preset condition is subsequently met, the second group of burners is controlled to start combustion first. When the required load is greater than the load supplied by the second group of burners when combustion is started, the gas supply channel corresponding to the third group of burners is opened to enable the second group of burners to ignite the third group of burners.

[0024] Preferably, the gas water heater comprises:

[0025] a first ignition device disposed adjacent to the first group of burners;

[0026] A second ignition device is provided adjacent to the second group of burners.

[0027] Preferably, the combustion device further includes a third group of burners and a fourth group of burners arranged between the first group of burners and the second group of burners, the third group of burners being closer to the second group of burners relative to the fourth group of burners; the third group of burners can be ignited by the second group of burners or the fourth group of burners in a burning state, and the fourth group of burners can be ignited by the first group of burners or the third group of burners in a burning state.

[0028] Preferably, when a first preset condition is met, the first group of burners is controlled to start combustion first, and when the required load is greater than the load supplied by the first group of burners when combustion is started, the first group of burners is controlled to ignite the fourth group of burners;

[0029] When the first preset condition is subsequently met, the second group of burners is controlled to start combustion first. When the required load is greater than the load supplied by the second group of burners, the second group of burners is controlled to ignite the third group of burners.

[0030] Preferably, the combustion device further comprises a third group of burners, a fourth group of burners and a fifth group of burners arranged between the first group of burners and the second group of burners, the third group of burners is closer to the second group of burners than the fourth group of burners, and the fifth group of burners is located between the third group of burners and the fourth group of burners;

[0031] The third group of burners can be piloted by the second group of burners or the fifth group of burners in a burning state, and the fourth group of burners can be piloted by the first group of burners or the fifth group of burners in a burning state.

[0032] Preferably, when a first preset condition is met, the first group of burners is controlled to start combustion first, and when the required load is greater than the load supplied by the first group of burners when combustion is started, the first group of burners is controlled to ignite the fourth group of burners;

[0033] When the first preset condition is subsequently met, the second group of burners is controlled to start combustion first. When the required load is greater than the load supplied by the second group of burners, the second group of burners is controlled to ignite the third group of burners.

[0034] A gas water heater, comprising:

[0035] heat exchangers;

[0036] a combustion device disposed opposite to the heat exchanger and capable of supplying heat energy to the heat exchanger; the combustion device comprising at least a first group of burners and a second group of burners, wherein the first group of burners and the second group of burners are spaced apart by a preset distance;

[0037] The gas water heater includes at least a first working state and a second working state:

[0038] In the first working state, the first group of burners is in a burning state, and the second group of burners is in a closed state;

[0039] In the second working state, the second group of burners is in a burning state, and the first group of burners is in a closed state.

[0040] Preferably, the gas water heater comprises: a first ignition device arranged near the first group of burners; and a second ignition device arranged near the second group of burners.

[0041] Preferably, the gas water heater further comprises: a distributor for delivering gas to the combustion device, the distributor comprising at least two gas delivery channels that can be opened and closed independently, and at least two of the gas delivery channels are respectively arranged corresponding to the first group of burners and the second group of burners.

[0042] Preferably, the combustion device further includes a third group of burners, wherein the third group of burners is located between the first group of burners and the second group of burners.

[0043] Preferably, the gas water heater further includes a third working state and a fourth working state:

[0044] In the third working state, the first group of burners and the third group of burners are in a burning state, and the second group of burners is in a closed state;

[0045] In the fourth working state, the second group of burners and the third group of burners are in a burning state, and the first group of burners is in a closed state.

[0046] Preferably, the gas water heater also includes a distributor for supplying gas to the combustion device, and the distributor includes at least three gas supply channels that can be opened and closed independently, and at least three of the gas supply channels are respectively arranged corresponding to the first group of burners, the second group of burners and the third group of burners.

[0047] Preferably, in the third working state, the gas supply channels corresponding to the first group of burners and the third group of burners are in an open state, and the gas supply channels corresponding to the second group of burners are in a closed state; in the fourth working state, the gas supply channels corresponding to the second group of burners and the third group of burners are in an open state, and the gas supply channels corresponding to the first group of burners are in a closed state.

[0048] Preferably, the gas water heater further includes a fifth working state, in which the first group of burners, the second group of burners and the third group of burners are in a burning state.

[0049] Preferably, the combustion device includes at least three fire-bar burners, the first group of burners includes at least one fire-bar burner, the second group of burners includes at least one fire-bar burner, and the third group of burners includes at least one fire-bar burner.

[0050] Preferably, the first group of burners is arranged opposite to a portion of the heat exchanger, the second group of burners is arranged opposite to a portion of the heat exchanger, and the third group of burners is arranged opposite to a portion of the heat exchanger.

[0051] Preferably, the first group of burners, the second group of burners and the third group of burners are arranged in sequence along the horizontal direction.

[0052] Preferably, the combustion device further comprises: a fourth group of burners, the fourth group of burners being located between the third group of burners and the first group of burners;

[0053] A distributor for delivering gas to the combustion device includes at least four gas delivery channels that can be opened and closed independently, and the at least four gas delivery channels are respectively arranged corresponding to the first group of burners, the second group of burners, the third group of burners and the fourth group of burners.

[0054] Preferably, in the first working state, the third group of burners and the fourth group of burners are in a closed state; in the second working state, the third group of burners and the fourth group of burners are in a closed state;

[0055] The gas water heater also includes a third working state and a fourth working state:

[0056] In the third working state, the first group of burners and the fourth group of burners are in a burning state, and the second group of burners and the third group of burners are in a closed state;

[0057] In the fourth working state, the second group of burners and the third group of burners are in a burning state, and the first group of burners and the fourth group of burners are in a closed state.

[0058] Preferably, the combustion device further comprises: a fifth group of burners, the fifth group of burners being located between the third group of burners and the fourth group of burners; the distributor comprising at least five gas transmission channels that can be independently opened and closed, the at least five gas transmission channels being respectively provided corresponding to the first group of burners, the second group of burners, the third group of burners, the fourth group of burners and the fifth group of burners;

[0059] In the first working state, the fifth group of burners, the third group of burners and the fourth group of burners are in a closed state; in the second working state, the fifth group of burners, the third group of burners and the fourth group of burners are in a closed state;

[0060] The gas water heater also includes a third working state and a fourth working state:

[0061] In the third working state, the first group of burners and the fourth group of burners are in a burning state, and the second group of burners, the third group of burners and the fifth group of burners are in a closed state; in the fourth working state, the second group of burners and the third group of burners are in a burning state, and the first group of burners, the fourth group of burners and the fifth group of burners are in a closed state.

[0062] The technical solution of the present invention has the following significant beneficial effects:

[0063] Each time a user starts using water, the control method of the gas water heater in the present application can alternately use the first group of burners and the second group of burners to ignite and start combustion, and use the group of burners that have just been ignited and started to heat the heat exchanger, thereby solving the problem that when the gas water heater is just started to burn and heat and when the required heat load of the gas water heater is small, the same group of burners is always used to heat the heat exchanger 1, thereby causing the local area of the heat exchanger 1 corresponding to the group of burners to be easily failed due to long-term high-intensity heating, thereby extending the service life of the gas water heater.

[0064] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope thereby. Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the drawings are merely illustrative and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances under the guidance of the present invention.

[0066] Figure 1 This is a flowchart of the steps of a method for controlling a gas water heater according to an embodiment of the present invention;

[0067] Figure 2 This is a schematic structural diagram of a gas water heater in a first embodiment of the present invention;

[0068] Figure 3 This is a schematic structural diagram of a gas water heater in a second embodiment of the present invention;

[0069] Figure 4 This is a schematic structural diagram of a gas water heater according to a third embodiment of the present invention;

[0070] Figure 5 This is a schematic structural diagram of a gas water heater in a fourth embodiment of the present invention;

[0071] Figure 6Schematic diagram of the structure of the distributor in an embodiment of the present invention.

[0072] Reference numerals in the above drawings:

[0073] 1. Heat exchanger; 11. First zone; 12. Second zone; 13. Third zone; 14. Fourth zone; 15. Fifth zone; 2. Combustion device; 21. First group of burners; 22. Second group of burners; 23. Third group of burners; 24. Fourth group of burners; 25. Fifth group of burners; 26. Fire bar burners; 3. First ignition device; 4. Second ignition device; 5. Distributor; 51. Gas transmission channel; 52. On-off valve. DETAILED DESCRIPTION

[0074] The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are for illustrative purposes only and are not to be construed as limiting the present invention in any way. Based on the teachings of the present invention, skilled artisans can conceive of any possible variations based on the present invention, all of which should be considered within the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element. The terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, internal communication between two elements, direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms based on the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0075] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0076] In order to solve the problem of easy failure caused by long-term heating of a local area of the heat exchanger, a control method for a gas water heater is proposed in this application. Figure 2 FIG. 1 is a schematic structural diagram of a gas water heater according to an embodiment of the present invention in a first embodiment. Figure 2As shown, the gas water heater includes a combustion device 2, which includes a first group of burners 21 and a second group of burners 22. Optionally, the first group of burners 21 and the second group of burners 22 can be independently turned on and off. The gas water heater may also include a heat exchanger 1. The combustion device 2 is arranged opposite the heat exchanger 1 and can supply heat energy to the heat exchanger 1. The combustion device 2 can be in a burning state or an off state. In the burning state, it is used to heat the heat exchanger 1. With the heat energy supplied by the combustion device 2, the heat exchanger 1 heats the water flowing through it, thereby producing hot water that meets the user's temperature requirements. Optionally, the heat exchanger 1 can be located above the combustion device 2, with the high-temperature flue gas generated by the combustion device 2 flowing through the heat exchanger 1. The entire combustion device 2 extends generally horizontally, and the heat exchanger 1 can also extend generally horizontally in correspondence with the combustion device 2.

[0077] Figure 1 FIG. 1 is a flow chart of the steps of the control method of the gas water heater according to the embodiment of the present invention. Figure 1 As shown, the control method of the gas water heater may include:

[0078] S100: When the first preset condition is met, the first group of burners 21 is controlled to start combustion, and the second group of burners 22 is controlled to be in a closed state.

[0079] In this step, when the first preset condition is met, the first group of burners 21 can be controlled to start burning first, that is, to ignite and start burning first, while the second group of burners 22 can be controlled to be in an off state. In the above process, the first preset condition can include a water use signal received from the user, at which point the gas water heater starts to heat water for the user. When the water use signal is just received from the user, the gas water heater needs to be ignited. The first group of burners 21 can be controlled to ignite and start burning first, while the second group of burners 22 can be controlled to be in an off state, thereby completing the ignition of the gas water heater. At this time, the heating load of the gas water heater is relatively small relative to the maximum heating load of the gas water heater. Afterwards, if the required load is greater than the load supplied by the first group of burners 21 when it is turned on, the second group of burners 22 can be controlled to also start burning.

[0080] As a feasible method, the gas water heater may include: at least two gas transmission channels 51 that can be opened and closed independently, and the at least two gas transmission channels 51 are respectively arranged corresponding to the first group of burners 21 and the second group of burners 22. That is, at least one gas transmission channel 51 is arranged in communication with the first group of burners 21, and at least one gas transmission channel 51 is arranged in communication with the second group of burners 22. In order to form the gas transmission channels 51, the gas water heater may include a distributor 5 for supplying gas to the combustion device 2, and the distributor 5 is formed with the at least two gas transmission channels 51 that can be opened and closed independently. Specifically, Figure 6 FIG. 1 is a schematic diagram of the structure of a distributor according to an embodiment of the present invention. Figure 6 As shown, the distributor 5 has a main gas transmission channel, and at least two gas transmission channels 51 are connected to the main gas transmission channel through their respective corresponding through holes on the distributor 5. An on-off valve 52 is installed on the distributor 5, and the on-off valve 52 can control the opening and closing of the through hole. When the through hole is closed, the gas transmission channel 51 is disconnected from the main gas transmission channel, that is, the gas transmission channel 51 is closed. When the through hole is opened, the gas transmission channel 51 is connected to the main gas transmission channel, that is, the gas transmission channel 51 is opened.

[0081] In controlling the first group of burners 21 to start combustion, it specifically includes: opening the gas supply channel 51 corresponding to the first group of burners 21, and starting the combustion of the first group of burners 21. In controlling the second group of burners 22 to be in an off state, it specifically includes: closing the gas supply channel 51 corresponding to the first group of burners 21. When the required load (the required load refers to the heat load required to heat the water entering the gas water heater to the user-set temperature) is greater than the load supplied by the first group of burners 21 to start combustion, the gas supply channel 51 corresponding to the second group of burners 22 is opened, thereby controlling the second group of burners 22 to start combustion. When a signal is received from the user to stop using water, the gas supply channel 51 corresponding to the first group of burners 21 and the second group of burners 22 is closed, and both the first group of burners 21 and the second group of burners 22 stop working, and the gas water heater stops heating.

[0082] As a feasible method, the gas water heater may include: a first ignition device 3 arranged near the first group of burners 21; and a second ignition device 4 arranged near the second group of burners 22. When the gas supply channel 51 corresponding to the first group of burners 21 is opened and the first group of burners 21 is started to burn, the first group of burners 21 can be ignited by the first ignition device 3 to start the combustion of the first group of burners 21. When the required load is greater than the load supplied by the first group of burners 21 to start combustion, the gas supply channel 51 corresponding to the second group of burners 22 is opened, thereby controlling the second group of burners 22 to start combustion. At this time, the second group of burners 22 can be ignited by the second ignition device 4 to start the combustion of the second group of burners 22; the second group of burners 22 can also be ignited by the first group of burners 21 to start the combustion of the second group of burners 22.

[0083] S200: When the first preset condition is subsequently met, the second group of burners 22 is controlled to start burning and the first group of burners 21 is controlled to be in a closed state, or after the first group of burners 21 is turned on for a first preset number of times, the second group of burners 22 is controlled to start burning and the first group of burners 21 is controlled to be in a closed state.

[0084] In this step, in one embodiment, when a first preset condition is subsequently satisfied, i.e., after the last water use ends, the gas water heater receives a water use signal from the user again, and the gas water heater needs to be turned on again to heat water for the user, the second group of burners 22 can be controlled to start burning first, i.e., ignite and begin burning first, while the first group of burners 21 is simultaneously controlled to be turned off. Alternatively, in another embodiment, when the user turns on water, if the first group of burners 21 is first turned on and burned a number of times that meets the first preset number, then when the first preset condition is subsequently satisfied, i.e., when the gas water heater receives a water use signal from the user again, the second group of burners 22 can be controlled to start burning first, while the first group of burners 21 is controlled to be turned off. Similarly, when the gas water heater needs to be ignited upon receiving a water use signal from the user, the second group of burners 22 can be controlled to start burning first, while the first group of burners 21 is controlled to be turned off, thereby completing the ignition of the gas water heater. At this time, the heating load of the gas water heater is relatively small compared to the maximum heating load of the gas water heater. Afterwards, if the required load is greater than the load supplied by the second group of burners 22 being turned on for combustion, the first group of burners 21 may be controlled to be turned on for combustion.

[0085] When the gas supply channel 51 corresponding to the second group of burners 22 is opened and the second group of burners 22 is started to burn, the second group of burners 22 can be ignited by the second ignition device 4 to start the second group of burners 22 to start the second group of burners 22. When the required load is greater than the load supplied by the second group of burners 22 to start the combustion, the gas supply channel 51 corresponding to the first group of burners 21 is opened, thereby controlling the first group of burners 21 to start the combustion. At this time, the first group of burners 21 can be ignited by the first ignition device 3 to start the first group of burners 21; the first group of burners 21 can also be ignited by the second group of burners 22 to start the first group of burners 21.

[0086] When a signal is received that the user stops using water, the gas transmission channels 51 corresponding to the first group of burners 21 and the second group of burners 22 are closed, the first group of burners 21 and the second group of burners 22 both stop working, and the gas water heater stops heating.

[0087] As a feasible method, the control method of the gas water heater may further include the following steps:

[0088] Repeat step S100 and step S200. After step S200 is executed, when the number of times the second group of burners 22 are turned on and burned meets the second preset number, when the user turns on water, the first group of burners 21 is controlled to start burning first, and at this time, the second group of burners 22 can be controlled to be in the off state first.

[0089] In the above steps, the number of times the second group of burners 22 are turned on for combustion satisfies the second preset number. The second preset number can be one or more times, which is not limited in the present application.

[0090] like Figure 2 As shown, the combustion device 2 may include at least two fire-bar burners 26, with the first group of burners 21 including at least one fire-bar burner 26, and the second group of burners 22 including at least one fire-bar burner 26. When the gas supply channel 51 corresponding to the first group of burners 21 is opened, the gas enters the fire-bar burners 26 of the first group of burners 21 and is then ignited by the first ignition device 3, thereby causing combustion. Similarly, when the gas supply channel 51 corresponding to the second group of burners 22 is opened, the gas enters the fire-bar burners 26 of the second group of burners 22 and is then ignited by the second ignition device 4, thereby causing combustion.

[0091] like Figure 2As shown, the heat exchanger 1 may have multiple regions, such as a first region 11 and a second region 12. The first group of burners 21 is primarily used to heat the first region 11 of the heat exchanger 1, and the second group of burners 22 is primarily used to heat the second region 12 of the heat exchanger 1. When there is no guide mechanism for guiding flue gas between the heat exchanger 1 and the combustion device 2, the first region 11 of the heat exchanger 1 is generally located directly above the first group of burners 21, and the second region 12 of the heat exchanger 1 is generally located directly above the second group of burners 22.

[0092] Each time a user starts using water, the control method of the gas water heater in the present application can alternately utilize the first group of burners 21 and the second group of burners 22 to ignite and start combustion, and utilize the group of burners that have just been ignited and started to heat the heat exchanger 1, thereby solving the problem that when the gas water heater is just started to start combustion and heating and when the required heat load of the gas water heater is relatively small, the same group of burners is always used to heat the heat exchanger 1, thereby causing the local area of the heat exchanger 1 corresponding to the group of burners to be easily failed due to long-term high-intensity heating, thereby extending the service life of the gas water heater.

[0093] Especially when the user's water flow rate is relatively small and the required heat load of the gas water heater is small, at this time, the water flow rate in the heat exchanger 1 is slow, and the local area of the heat exchanger 1 corresponding to the same group of burners has been subjected to high heat intensity for a long time. The local area of the heat exchanger 1 is prone to scaling, and because the water flow rate is slow, the scaling is more likely to adhere to the inner wall of the heat exchange tube of the heat exchanger 1. The scaling is more likely to cause the heat exchange tube of the heat exchanger 1 at this location to be unable to quickly transfer the received heat to the water, thereby causing the heat exchange tube of the heat exchanger 1 at this location to be more likely to burn out and fail.

[0094] As a feasible option, the gas water heater can include at least a first operating state and a second operating state. In the first operating state, the first group of burners 21 is in a burning state, and the second group of burners 22 is in a closed state. In the second operating state, the second group of burners 22 is in a burning state, and the first group of burners 21 is in a closed state. In this manner, each time the gas water heater needs to start heating, the first and second operating states can be alternately used to supply heat energy to the heat exchanger 1.

[0095] Furthermore, a preset distance may be provided between the first group of burners 21 and the second group of burners 22. The preset distance may be such that when the first group of burners 21 is burning, the high-temperature flue gas generated can have less impact on the second region 12 of the heat exchanger 1, thereby preventing the second region 12 from being heated to a higher intensity. Similarly, the preset distance may also ensure that when the second group of burners 22 is burning, the high-temperature flue gas generated can have less impact on the first region 11 of the heat exchanger 1, thereby preventing the first region 11 from being heated to a higher intensity. In this manner, the problem of easy failure caused by long-term high-intensity heating of the first and second regions 11, 12 of the heat exchanger 1 can be effectively avoided, thereby extending the service life of the gas water heater. As a feasible approach, the preset distance can also ensure that when the second group of burners 22 is in a combustion state, the high-temperature flue gas generated can have a less impact on the side of the first area 11 of the heat exchanger 1 close to the second area 12, thereby avoiding high-intensity heating on the side of the first area 11 close to the second area 12; the preset distance can also be the distance at which when the first group of burners 21 is in a combustion state, the high-temperature flue gas generated can have a less impact on the side of the second area 12 of the heat exchanger 1 close to the first area 11, thereby avoiding high-intensity heating on the side of the second area 12 close to the first area 11. In this way, the problem of easy failure caused by long-term high-intensity heating on the side of the first area 11 of the heat exchanger 1 close to the second area 12 and the side of the second area 12 close to the first area 11 can be effectively avoided, thereby extending the service life of the gas water heater.

[0096] If there is no preset distance between the first group of burners 21 and the second group of burners 22, the high-temperature flue gas generated by the first group of burners 21 when burning will significantly affect the second region 12 of the heat exchanger 1, causing the second region 12 to be heated to a higher degree. The high-temperature flue gas generated by the second group of burners 22 when burning will also significantly affect the first region 11 of the heat exchanger 1, causing the first region 11 to be heated to a higher degree. As a result, regardless of whether the first or second group of burners 21, 22 is burning, the first and second regions 11, 12 of the heat exchanger 1 will be significantly affected by the high-temperature flue gas, which will reduce the life of the heat exchanger 1. In particular, regardless of whether the first or second group of burners 21, 22 is burning, the side of the first region 11 of the heat exchanger 1 near the second region 12 and the side of the second region 12 of the heat exchanger 1 near the first region 11 are most severely affected by the high-temperature flue gas, making them most susceptible to scaling and, consequently, failure and damage in the later stages.

[0097] Since the first group of burners 21 and the second group of burners 22 are spaced apart by a preset distance, the first area 11 and the second area 12 of the heat exchanger 1 are also spaced apart by a certain distance. In this way, when the first group of burners 21 starts burning or keeps burning, the degree of heating on the leftmost side of the second area 12 of the heat exchanger 1 corresponding to the second group of burners 22 is greatly reduced. Similarly, when the second group of burners 22 starts burning or keeps burning, the degree of heating on the rightmost side of the first area 11 of the heat exchanger 1 corresponding to the first group of burners 21 is greatly reduced. In this way, whether the first group of burners 21 starts burning or keeps burning or the second group of burners 22 starts burning or keeps burning, the leftmost side of the second area 12 of the heat exchanger 1 corresponding to the second group of burners 22 or the rightmost side of the first area 11 of the heat exchanger 1 corresponding to the first group of burners 21 will not be in a high-intensity heating state for a long time. Therefore, the leftmost side of the second area 12 of the heat exchanger 1 corresponding to the second group of burners 22 and the rightmost side of the first area 11 of the heat exchanger 1 corresponding to the first group of burners 21 are not prone to failure problems, which extends the service life of the gas water heater to a certain extent.

[0098] If there is no preset distance between the first group of burners 21 and the second group of burners 22, the first area 11 and the second area 12 of the heat exchanger 1 will be closely adjacent to each other. Even when the required heat load is low, only the first group of burners 21 or the second group of burners 22 is turned on to heat the heat exchanger 1. If only the first group of burners 21 is turned on to heat the heat exchanger 1, the leftmost portion of the second area 12 of the heat exchanger 1 corresponding to the second group of burners 22 will also be subjected to high-intensity heating. Alternatively, if only the second group of burners 22 is turned on to heat the heat exchanger 1, the rightmost portion of the first area 11 of the heat exchanger 1 corresponding to the first group of burners 21 will also be subjected to high-intensity heating. In other words, when the required heat load is low, the leftmost portion of the second area 12 of the heat exchanger 1 corresponding to the second group of burners 22 and the rightmost portion of the first area 11 of the heat exchanger 1 corresponding to the first group of burners 21 will always be subjected to high-intensity heating, making these two locations extremely susceptible to burnout and failure.

[0099] As a feasible method, in order to make the first group of burners 21 and the second group of burners 22 have a preset distance, such as Figure 2 As shown, the combustion device 2 may include a third group of burners 23, which is located between the first group of burners 21 and the second group of burners. The first group of burners 21, the second group of burners 22, and the third group of burners 23 are arranged in sequence along the horizontal direction. The third group of burners 23 can be ignited by the first group of burners 21 or the second group of burners 22 in the burning state.

[0100] like Figure 2As shown, the distributor 5 may include at least three gas delivery channels 51 that can be independently opened and closed, and the at least three gas delivery channels 51 are respectively provided corresponding to the first group of burners 21, the second group of burners 22, and the third group of burners 23. Correspondingly, the combustion device 2 may include at least three fire bar burners 26, the first group of burners 21 includes at least one fire bar burner 26, the second group of burners 22 includes at least one fire bar burner 26, and the third group of burners 23 includes at least one fire bar burner 26.

[0101] like Figure 2 As shown, the first group of burners 21 is disposed opposite a portion of the heat exchanger 1, the second group of burners 22 is disposed opposite a portion of the heat exchanger 1, and the third group of burners 23 is disposed opposite a portion of the heat exchanger 1. In other words, the heat exchanger 1 may have multiple zones, such as a first zone 11, a second zone 12, and a third zone 13. The first group of burners 21 is primarily used to heat the first zone 11 of the heat exchanger 1, the second group of burners 22 is primarily used to heat the second zone 12 of the heat exchanger 1, and the third group of burners 23 is primarily used to heat the third zone 13 of the heat exchanger 1. When there is no flue gas diversion mechanism between the heat exchanger 1 and the combustion device 2, the third zone 13 of the heat exchanger 1 is generally located directly above the third group of burners 23, and between the first zone 11 and the second zone 12. The third zone 13 creates a certain distance between the first zone 11 and the second zone 12 of the heat exchanger 1. When the third group of burners 23 needs to start combustion, the gas supply channel 51 corresponding to the third group of burners 23 is opened, and the flames of the already burning first group of burners 21 or second group of burners 22 can ignite the gas of the third group of burners 23, thereby starting combustion. To facilitate the flames of the already burning first group of burners 21 or second group of burners 22 to immediately ignite the gas of the third group of burners 23, one side of the third group of burners 23 is closely adjacent to the first group of burners 21, and the other side of the third group of burners 23 is closely adjacent to the second group of burners 22.

[0102] In this embodiment, when the gas water heater is in the first working state, the third group of burners 23 is in the closed state. When the gas water heater is in the second working state, the third group of burners 23 is in the closed state.

[0103] In this embodiment, the gas water heater may further include a third operating state and a fourth operating state. In the third operating state, the first group of burners 21 and the third group of burners 23 are in a burning state, and the second group of burners 22 is in a closed state. At this time, the gas supply channels 51 corresponding to the first group of burners 21 and the third group of burners 23 are in an open state, and the gas supply channels 51 corresponding to the second group of burners 22 are in a closed state. In the fourth operating state, the second group of burners 22 and the third group of burners 23 are in a burning state, and the first group of burners 21 is in a closed state. At this time, the gas supply channels 51 corresponding to the second group of burners 22 and the third group of burners 23 are in an open state, and the gas supply channels 51 corresponding to the first group of burners 21 are in a closed state.

[0104] Furthermore, the gas water heater can also include a fifth operating state: in the fifth operating state, the first group of burners 21, the second group of burners 22, and the third group of burners 23 are in a combustion state. At this time, the gas transmission channels 51 corresponding to the first group of burners 21, the second group of burners 22, and the third group of burners 23 are all in an open state.

[0105] Step 100 may also include: when a first preset condition is met, controlling the first group of burners 21 to start combustion first; when the required load is greater than the load supplied by the first group of burners 21 when combustion is started, controlling the first group of burners 21 to ignite the third group of burners 23.

[0106] Specifically, when the required load is greater than the load supplied by the first group of burners 21 when combustion is started, the gas supply channel 51 corresponding to the third group of burners 23 is opened so that the first group of burners 21 ignites the third group of burners 23, thereby causing the gas water heater to enter the third working state from the first working state.

[0107] Furthermore, when the required load is greater than the load supplied by the first and third burner groups 21, 23, the third burner group 23 is controlled to ignite the second burner group 22. Specifically, the gas supply channel 51 corresponding to the second burner group 22 can be opened to allow the third burner group 23 to ignite the second burner group 22, thereby causing the gas water heater to enter the fifth operating state from the third operating state.

[0108] Step 200 may also include: when the first preset condition is subsequently met, controlling the second group of burners 22 to start combustion first, and when the required load is greater than the load supplied by the second group of burners 22 starting combustion, controlling the second group of burners 22 to ignite the third group of burners 23.

[0109] Specifically, when the required load is greater than the load supplied by the second group of burners 22 when they are turned on for combustion, the gas supply channel 51 corresponding to the third group of burners 23 is opened so that the second group of burners 22 ignites the third group of burners 23, thereby causing the gas water heater to enter the fourth working state from the second working state.

[0110] Furthermore, when the required load is greater than the load supplied by the second and third burner groups 22, 23, the third burner group 23 is controlled to ignite the first burner group 21. Specifically, the gas supply channel 51 corresponding to the first burner group 21 can be opened to allow the third burner group 23 to ignite the first burner group 21, thereby causing the gas water heater to enter the fifth operating state from the fourth operating state.

[0111] In a second embodiment, Figure 3 FIG. 1 is a schematic structural diagram of a gas water heater according to a second embodiment of the present invention. Figure 3 As shown, in this embodiment, the combustion device 2 may include a third group of burners 23 and a fourth group of burners 24 disposed between the first group of burners 21 and the second group of burners 22. The third group of burners 23 is closer to the second group of burners 22 than the fourth group of burners 24. The third group of burners 23 can be ignited by the second group of burners 22 or the fourth group of burners 24 in a burning state, and the fourth group of burners 24 can be ignited by the first group of burners 21 or the third group of burners 23 in a burning state. The first group of burners 21, the fourth group of burners 24, the third group of burners 23, and the second group of burners 22 are disposed in close proximity in this order.

[0112] Correspondingly, the distributor 5 may include at least four gas delivery channels 51 that can be independently opened and closed, and the at least four gas delivery channels 51 are respectively provided corresponding to the at least four groups of burners. Correspondingly, the combustion device 2 may include at least four fire bar burners 26, the first group of burners 21 including at least one fire bar burner 26, the second group of burners 22 including at least one fire bar burner 26, the third group of burners 23 including at least one fire bar burner 26, and the fourth group of burners 24 including at least one fire bar burner 26.

[0113] like Figure 3As shown, the first group of burners 21 is disposed opposite a portion of the heat exchanger 1, the second group of burners 22 is disposed opposite a portion of the heat exchanger 1, the third group of burners 23 is disposed opposite a portion of the heat exchanger 1, and the fourth group of burners 24 is disposed opposite a portion of the heat exchanger 1. In other words, the heat exchanger 1 may have multiple zones, such as a first zone 11, a second zone 12, a third zone 13, and a fourth zone 14. The first group of burners 21 is primarily used to heat the first zone 11 of the heat exchanger 1, the second group of burners 22 is primarily used to heat the second zone 12 of the heat exchanger 1, the third group of burners 23 is primarily used to heat the third zone 13 of the heat exchanger 1, and the fourth group of burners 24 is primarily used to heat the fourth zone 14 of the heat exchanger 1. When there is no flue gas diversion mechanism between the heat exchanger 1 and the combustion device 2, the third region 13 of the heat exchanger 1 is generally located directly above the third group of burners 23, and the fourth region 14 of the heat exchanger 1 is generally located directly above the fourth group of burners 24. The third and fourth regions 13, 14 of the heat exchanger 1 are located between the first and second regions 11, 12, with the third region 13 being closer to the second region 12 than the fourth region 14. The third and fourth regions 13, 14 create a certain distance between the first and second regions 11, 12 of the heat exchanger 1. When the third group of burners 23 needs to burn, the gas supply channel 51 corresponding to the third group of burners 23 is opened, and the flames of the already burning fourth group of burners 24 or second group of burners 22 can ignite the gas of the third group of burners 23, causing it to burn. When the fourth group of burners 24 needs to burn, the gas supply channel 51 corresponding to the fourth group of burners 24 is opened, and the flame of the first group of burners 21 or the third group of burners 23 that is already burning can ignite the gas of the fourth group of burners 24, thereby causing it to start burning.

[0114] In this embodiment, when the gas water heater is in the first working state, the third group of burners 23 and the fourth group of burners 24 are in the closed state. When the gas water heater is in the second working state, the third group of burners 23 and the fourth group of burners 24 are in the closed state.

[0115] In this embodiment, the gas water heater may further include a third operating state and a fourth operating state. In the third operating state, the first and fourth burner groups 21, 24 are in a combustion state, while the second and third burner groups 22, 23 are in a closed state. At this time, the gas supply channels 51 corresponding to the first and fourth burner groups 21, 24 are in an open state, while the gas supply channels 51 corresponding to the second and third burner groups 22, 23 are in a closed state. In the fourth state, the second and third burner groups 22, 23 are in a combustion state, while the first and fourth burner groups 21, 24 are in a closed state. At this time, the gas supply channels 51 corresponding to the second and third burner groups 22, 23 are in an open state, while the gas supply channels 51 corresponding to the first and fourth burner groups 21, 24 are in a closed state.

[0116] Furthermore, in this embodiment, the gas water heater may also include a fifth operating state and a sixth operating state. In the fifth operating state, the first group of burners 21, the fourth group of burners 24, and the third group of burners 23 are in a combustion state, and the second group of burners 22 is in a closed state. At this time, the gas supply channels 51 corresponding to the first group of burners 21, the fourth group of burners 24, and the third group of burners 23 are in an open state, and the gas supply channels 51 corresponding to the second group of burners 22 are in a closed state. In the sixth operating state, the second group of burners 22, the third group of burners 23, and the fourth group of burners 24 are in a combustion state, and the first group of burners 21 is in a closed state. At this time, the gas supply channels 51 corresponding to the second group of burners 22, the third group of burners 23, and the fourth group of burners 24 are in an open state, and the gas supply channels 51 corresponding to the first group of burners 21 are in a closed state.

[0117] Furthermore, the gas water heater can also include a seventh operating state. In the seventh operating state, the first group of burners 21, the second group of burners 22, the fourth group of burners 24, and the third group of burners 23 are all in a combustion state. At this time, the gas transmission channels 51 corresponding to the first group of burners 21, the second group of burners 22, the fourth group of burners 24, and the third group of burners 23 are all in an open state.

[0118] In step S100, the process may further include: when a first preset condition is met, controlling the first group of burners 21 to start combustion first; and when the required load is greater than the load supplied by the first group of burners 21 when combustion is started, controlling the first group of burners 21 to ignite the fourth group of burners 24. Specifically, when the required load is greater than the load supplied by the first group of burners 21 when combustion is started, opening the gas transmission channel 51 corresponding to the fourth group of burners 24, so that the first group of burners 21 ignites the fourth group of burners 24, thereby causing the gas water heater to enter the third working state from the first working state.

[0119] Furthermore, when the required load is greater than the load supplied by the first and fourth burner groups 21, 24, the fourth burner group 24 is controlled to ignite the third burner group 23. Specifically, the gas supply channel 51 corresponding to the third burner group 23 can be opened to allow the fourth burner group 24 to ignite the third burner group 23, thereby causing the gas water heater to enter the fifth operating state from the third operating state.

[0120] Furthermore, when the required load is greater than the load supplied by the first group of burners 21, the fourth group of burners 24, and the third group of burners 23, the third group of burners 23 is controlled to ignite the second group of burners 22. Specifically, the gas supply channel 51 corresponding to the second group of burners 22 can be opened to allow the third group of burners 23 to ignite the second group of burners 22, thereby causing the gas water heater to enter the seventh working state from the fifth working state.

[0121] In step S200, the process may further include: when the first preset condition is subsequently satisfied, controlling the second group of burners 22 to start combustion first, and when the required load is greater than the load supplied by the second group of burners 22 when combustion is started, controlling the second group of burners 22 to ignite the third group of burners 23. Specifically, when the required load is greater than the load supplied by the second group of burners 22 when combustion is started, opening the gas transmission channel 51 corresponding to the third group of burners 23, so that the second group of burners 22 ignites the third group of burners 23, thereby causing the gas water heater to enter the fourth operating state from the second operating state.

[0122] Furthermore, when the required load is greater than the load supplied by the second and third burner groups 22, 23, the third burner group 23 is controlled to ignite the fourth burner group 24. Specifically, the gas supply channel 51 corresponding to the fourth burner group 24 is opened to allow the third burner group 23 to ignite the fourth burner group 24, thereby causing the gas water heater to enter the sixth operating state from the fourth operating state.

[0123] Furthermore, when the required load is greater than the load supplied by the second group of burners 22, the fourth group of burners 24, and the third group of burners 23, the fourth group of burners 24 is controlled to ignite the first group of burners 21. Specifically, the gas supply channel 51 corresponding to the first group of burners 21 can be opened to allow the fourth group of burners 24 to ignite the first group of burners 21, thereby causing the gas water heater to enter the seventh working state from the sixth working state.

[0124] The control method of the above-mentioned gas water heater can realize that the gas water heater can meet different required loads, and when the required load is less than or equal to the load supplied when the second group of burners 22 and the third group of burners 23 are burning, or less than or equal to the load supplied when the first group of burners 21 and the fourth group of burners 24 are burning, the first group of burners 21 and the fourth group of burners 24 and the second group of burners 22 and the third group of burners 23 can be used alternately to supply heat energy to the heat exchanger 1, thereby avoiding the problem of always using one or more groups of burners at the same position to heat the heat exchanger 1, which causes the local area of the heat exchanger 1 corresponding to the burner to be easily failed due to long-term high-intensity heating, thereby extending the service life of the gas water heater.

[0125] In a third embodiment, Figure 4 FIG. 1 is a schematic structural diagram of a gas water heater according to a third embodiment of the present invention. Figure 4 As shown, in this embodiment, the combustion device 2 may include a third group of burners 23 disposed between the first group of burners 21 and the second group of burners 22; and a fourth group of burners 24, with the first group of burners 21 disposed between the third group of burners 23 and the fourth group of burners 24. The third group of burners 23 can be ignited by either the second group of burners 22 or the first group of burners 21 in a burning state, and the fourth group of burners 24 can be ignited by the first group of burners 21 in a burning state. The fourth group of burners 24, the first group of burners 21, the third group of burners 23, and the second group of burners 22 are disposed in close proximity to each other.

[0126] Correspondingly, the distributor 5 may include at least four gas delivery channels 51 that can be opened and closed independently, and the at least four gas delivery channels 51 are respectively arranged corresponding to the at least four groups of burners. The heat exchanger 1 may have multiple areas, such as a first area 11, a second area 12, a third area 13, and a fourth area 14. The above structure is similar to that in the second embodiment and will not be repeated here. Among them, when there is no diversion mechanism for diverting the flue gas between the heat exchanger 1 and the combustion device 2, the third area 13 of the heat exchanger 1 is generally located directly above the third group of burners 23, and the fourth area 14 of the heat exchanger 1 is generally located directly above the fourth group of burners 24. The third area 13 of the heat exchanger 1 is located between the first area 11 and the second area 12, and the first area 11 is located between the fourth area 14 and the third area 13. The third area 13 is used to provide a certain spacing distance between the first area 11 and the second area 12 of the heat exchanger 1. When the third group of burners 23 needs to start combustion, the gas supply channel 51 corresponding to the third group of burners 23 is opened, and the flames of the first group of burners 21 or the second group of burners 22, which are already burning, can ignite the gas of the third group of burners 23, thereby starting combustion. When the fourth group of burners 24 needs to start combustion, the gas supply channel 51 corresponding to the fourth group of burners 24 is opened, and the flames of the first group of burners 21, which are already burning, can ignite the gas of the fourth group of burners 24, thereby starting combustion.

[0127] In this embodiment, when the gas water heater is in the first working state, the third group of burners 23 and the fourth group of burners 24 are in the closed state. When the gas water heater is in the second working state, the third group of burners 23 and the fourth group of burners 24 are in the closed state.

[0128] In this embodiment, the gas water heater may further include a third operating state and a fourth operating state. In the third operating state, the first and fourth burner groups 21, 24 are in a combustion state, while the second and third burner groups 22, 23 are in a closed state. At this time, the gas supply channels 51 corresponding to the first and fourth burner groups 21, 24 are in an open state, while the gas supply channels 51 corresponding to the second and third burner groups 22, 23 are in a closed state. In the fourth operating state, the second and third burner groups 22, 23 are in a combustion state, while the first and fourth burner groups 21, 24 are in a closed state. At this time, the gas supply channels 51 corresponding to the second and third burner groups 22, 23 are in an open state, while the gas supply channels 51 corresponding to the first and fourth burner groups 21, 24 are in a closed state.

[0129] Furthermore, in this embodiment, the gas water heater may also include a fifth operating state and a sixth operating state. In the fifth operating state, the first group of burners 21, the fourth group of burners 24, and the third group of burners 23 are in a combustion state, and the second group of burners 22 is in a closed state. At this time, the gas supply channels 51 corresponding to the first group of burners 21, the fourth group of burners 24, and the third group of burners 23 are in an open state, and the gas supply channels 51 corresponding to the second group of burners 22 are in a closed state. In the sixth operating state, the second group of burners 22, the third group of burners 23, and the first group of burners 21 are in a combustion state, and the fourth group of burners 24 is in a closed state. At this time, the gas supply channels 51 corresponding to the second group of burners 22, the third group of burners 23, and the first group of burners 21 are in an open state, and the gas supply channels 51 corresponding to the fourth group of burners 24 are in a closed state.

[0130] Furthermore, the gas water heater can also include a seventh operating state. In the seventh operating state, the first group of burners 21, the second group of burners 22, the fourth group of burners 24, and the third group of burners 23 are all in a combustion state. At this time, the gas transmission channels 51 corresponding to the first group of burners 21, the second group of burners 22, the fourth group of burners 24, and the third group of burners 23 are all in an open state.

[0131] In step S100, the process may further include: when a first preset condition is met, controlling the first group of burners 21 to start combustion first; and when the required load is greater than the load supplied by the first group of burners 21 when combustion is started, controlling the first group of burners 21 to ignite the fourth group of burners 24. Specifically, when the required load is greater than the load supplied by the first group of burners 21 when combustion is started, opening the gas transmission channel 51 corresponding to the fourth group of burners 24, so that the first group of burners 21 ignites the fourth group of burners 24, thereby causing the gas water heater to enter the third working state from the first working state.

[0132] Furthermore, when the required load is greater than the load supplied by the first group of burners 21 and the fourth group of burners 24, the first group of burners 21 is controlled to ignite the third group of burners 23. Specifically, the gas supply channel 51 corresponding to the third group of burners 23 can be opened to allow the first group of burners 21 to ignite the third group of burners 23, thereby causing the gas water heater to enter the fifth operating state from the third operating state.

[0133] Furthermore, when the required load is greater than the load supplied by the first group of burners 21, the fourth group of burners 24, and the third group of burners 23, the third group of burners 23 is controlled to ignite the second group of burners 22. Specifically, the gas supply channel 51 corresponding to the second group of burners 22 can be opened to allow the third group of burners 23 to ignite the second group of burners 22, thereby causing the gas water heater to enter the seventh working state from the fifth working state.

[0134] In step S200, the process may further include: when the first preset condition is subsequently satisfied, controlling the second group of burners 22 to start combustion first, and when the required load is greater than the load supplied by the second group of burners 22 when combustion is started, controlling the second group of burners 22 to ignite the third group of burners 23. Specifically, when the required load is greater than the load supplied by the second group of burners 22 when combustion is started, opening the gas transmission channel 51 corresponding to the third group of burners 23, so that the second group of burners 22 ignites the third group of burners 23, thereby causing the gas water heater to enter the fourth operating state from the second operating state.

[0135] Furthermore, when the required load is greater than the load supplied by the second group of burners 22 and the third group of burners 23, the third group of burners 23 is controlled to ignite the first group of burners 21. Specifically, the gas transmission channel 51 corresponding to the first group of burners 21 can be opened to allow the third group of burners 23 to ignite the first group of burners 21, thereby causing the gas water heater to enter the sixth working state from the fourth working state, and then the gas water heater to enter the seventh working state from the sixth working state.

[0136] Furthermore, when the required load is greater than the load supplied by the second group of burners 22, the first group of burners 21, and the third group of burners 23, the first group of burners 21 is controlled to ignite the fourth group of burners 24. Specifically, the gas supply channel 51 corresponding to the fourth group of burners 24 can be opened to allow the first group of burners 21 to ignite the fourth group of burners 24.

[0137] The control method of the gas water heater in this embodiment can have the same beneficial effects as that in the second embodiment.

[0138] In a fourth embodiment, Figure 5 FIG. 1 is a schematic structural diagram of a gas water heater according to a fourth embodiment of the present invention. Figure 5As shown, the combustion device 2 may further include a third group of burners 23, a fourth group of burners 24, and a fifth group of burners 25 disposed between the first group of burners 21 and the second group of burners 22. The third group of burners 23 is closer to the second group of burners 22 than the fourth group of burners 24, and the fifth group of burners 25 is located between the third group of burners 23 and the fourth group of burners 24. The third group of burners 23 can be ignited by the second group of burners 22 or the fifth group of burners 25 in a burning state, and the fourth group of burners 24 can be ignited by the first group of burners 21 or the fifth group of burners 25 in a burning state. As is feasible, the first group of burners 21, the fourth group of burners 24, the fifth group of burners 25, the third group of burners 23, and the second group of burners 22 are disposed in close proximity in sequence.

[0139] Correspondingly, the distributor 5 may include at least five gas delivery channels 51 that can be opened and closed independently, and the at least five gas delivery channels 51 are respectively arranged corresponding to the at least five groups of burners. The heat exchanger 1 may have multiple areas, such as a first area 11, a second area 12, a third area 13, a fourth area 14 and a fifth area 15. The above structure is similar to that in other embodiments above and will not be repeated here. Among them, when there is no diversion mechanism for diverting the flue gas between the heat exchanger 1 and the combustion device 2, the third area 13 of the heat exchanger 1 is roughly located directly above the third group of burners 23, the fourth area 14 of the heat exchanger 1 is roughly located directly above the fourth group of burners 24, and the fifth area 15 of the heat exchanger 1 is roughly located directly above the fifth group of burners 25. The fourth, fifth, and third regions 14, 15, and 13 of the heat exchanger 1 are located between the first and second regions 11, 12. The fifth region 15 is located between the fourth and third regions 13. The third region 13 is closer to the second region 12 than the fourth region 14. The fourth, fifth, and third regions 14, 15, and 13 create a certain distance between the first and second regions 11, 12 of the heat exchanger 1. When the third group of burners 23 needs to start combustion, the corresponding gas supply channel 51 is opened. The flames of the already burning second or fifth group of burners 22, 25 can ignite the gas in the third group of burners 23, thus starting combustion. When the fourth group of burners 24 needs to start combustion, the corresponding gas supply channel 51 is opened. The flames of the already burning first or fifth group of burners 21, 25 can ignite the gas in the fourth group of burners 24, thus starting combustion. When the fifth group of burners 25 needs to burn, the gas supply channel 51 corresponding to the fifth group of burners 25 is opened, and the flame of the third group of burners 23 or the fourth group of burners 24 that is already burning can ignite the gas of the fifth group of burners 25, thereby causing it to start burning.

[0140] In this embodiment, when the gas water heater is in the first working state, the third group of burners 23, the fourth group of burners 24, and the fifth group of burners 25 are in the off state. When the gas water heater is in the second working state, the third group of burners 23, the fourth group of burners 24, and the fifth group of burners 25 are in the off state.

[0141] In this embodiment, the gas water heater may further include a third operating state and a fourth operating state. In the third operating state, the first and fourth burner groups 21, 24 are in a combustion state, while the second, third, and fifth burner groups 22, 23, 25 are in a closed state. At this time, the gas supply channels 51 corresponding to the first and fourth burner groups 21, 24 are open, while the gas supply channels 51 corresponding to the second, third, and fifth burner groups 22, 23, 25 are closed. In the fourth operating state, the second and third burner groups 22, 23 are in a combustion state, while the first, fourth, and fifth burner groups 21, 24, 25 are in a closed state. At this time, the gas supply channels 51 corresponding to the second and third burner groups 22, 23, 23 are open, while the gas supply channels 51 corresponding to the first, fourth, and fifth burner groups 21, 24, 25 are closed.

[0142] Furthermore, in this embodiment, the gas water heater may also include a fifth operating state and a sixth operating state. In the fifth operating state, the first, fourth, and fifth burner groups 21, 24, and 25 are in a combustion state, while the second, second, and third burner groups 22, 23 are in a closed state. At this time, the gas supply channels 51 corresponding to the first, fourth, and fifth burner groups 21, 24, and 25 are in an open state, while the gas supply channels 51 corresponding to the second, third, and third burner groups 23 are in a closed state. In the sixth operating state, the second, third, and fifth burner groups 22, 23, and 25 are in a combustion state, while the first, fourth, and fifth burner groups 24 are in a closed state. At this time, the gas supply channels 51 corresponding to the second, third, and fifth burner groups 22, 23, and 25 are in an open state, while the gas supply channels 51 corresponding to the first, fourth, and fourth burner groups 24 are in a closed state.

[0143] Furthermore, the gas water heater can also include a seventh operating state. In the seventh operating state, the first group of burners 21, the second group of burners 22, the third group of burners 23, the fourth group of burners 24, and the fifth group of burners 25 are all in a combustion state. At this time, the gas transmission channels 51 corresponding to the first group of burners 21, the second group of burners 22, the fourth group of burners 24, the third group of burners 23, and the fifth group of burners 25 are all in an open state.

[0144] In step S100, the process may further include: when a first preset condition is met, controlling the first group of burners 21 to start combustion first; and when the required load is greater than the load supplied by the first group of burners 21 when combustion is started, controlling the first group of burners 21 to ignite the fourth group of burners 24. Specifically, when the required load is greater than the load supplied by the first group of burners 21 when combustion is started, opening the gas transmission channel 51 corresponding to the fourth group of burners 24, so that the first group of burners 21 ignites the fourth group of burners 24, thereby causing the gas water heater to enter the third working state from the first working state.

[0145] Furthermore, when the required load is greater than the load supplied by the first and fourth burner groups 21, 24, the fourth burner group 24 is controlled to ignite the fifth burner group 25. Specifically, the gas supply channel 51 corresponding to the fifth burner group 25 can be opened to allow the fourth burner group 24 to ignite the fifth burner group 25, thereby causing the gas water heater to enter the fifth operating state from the third operating state.

[0146] Furthermore, when the required load is greater than the load supplied by the first group of burners 21, the fourth group of burners 24, and the fifth group of burners 25, the fifth group of burners 25 is controlled to ignite the third group of burners 23, and then the third group of burners 23 is used to ignite the second group of burners 22. Specifically, the gas supply channel 51 corresponding to the third group of burners 23 can be opened first to allow the fifth group of burners 25 to ignite the third group of burners 23, and then the gas supply channel 51 corresponding to the second group of burners 22 can be opened to allow the third group of burners 23 to ignite the second group of burners 22, thereby causing the gas water heater to enter the seventh working state from the fifth working state.

[0147] In step S200, the process may further include: when the first preset condition is subsequently satisfied, controlling the second group of burners 22 to start combustion first, and when the required load is greater than the load supplied by the second group of burners 22 when combustion is started, controlling the second group of burners 22 to ignite the third group of burners 23. Specifically, when the required load is greater than the load supplied by the second group of burners 22 when combustion is started, opening the gas transmission channel 51 corresponding to the third group of burners 23, so that the second group of burners 22 ignites the third group of burners 23, thereby causing the gas water heater to enter the fourth operating state from the second operating state.

[0148] Furthermore, when the required load is greater than the load supplied by the second and third burner groups 22, 23, the third burner group 23 is controlled to ignite the fifth burner group 25. Specifically, the gas supply channel 51 corresponding to the fifth burner group 25 can be opened to allow the third burner group 23 to ignite the fifth burner group 25, thereby causing the gas water heater to enter the sixth operating state from the fourth operating state.

[0149] Furthermore, when the required load is greater than the load supplied by the second group of burners 22, the fifth group of burners 25, and the third group of burners 23, the fifth group of burners 25 is controlled to ignite the fourth group of burners 24, and then the fourth group of burners 24 is controlled to ignite the first group of burners 21. Specifically, the gas supply channel 51 corresponding to the fourth group of burners 24 can be opened first to allow the fifth group of burners 25 to ignite the fourth group of burners 24, and then the gas supply channel 51 corresponding to the first group of burners 21 can be opened to allow the fourth group of burners 24 to ignite the first group of burners 21, thereby causing the gas water heater to enter the seventh working state from the sixth working state.

[0150] Through the control method of the above-mentioned gas water heater, the gas water heater can meet different required loads, and when the required load is less than or equal to the load supplied when the second group of burners 22 and the third group of burners 23 are burning, or less than or equal to the load supplied when the first group of burners 21 and the fourth group of burners 24 are burning, each time the gas water heater is started to supply heat, the first group of burners 21 and the fourth group of burners 24 and the second group of burners 22 and the third group of burners 23 can be used alternately to supply heat energy to the heat exchanger 1. In the above process, the fifth group of burners 25 is always between the first group of burners 21 and the fourth group of burners 24 and the second group of burners 22 and the third group of burners 23. In this way, when the first group of burners 21 and the fourth group of burners 24 keep burning, the degree of heating on the left side of the third area 13 of the heat exchanger 1 corresponding to the third group of burners 23 is greatly reduced. Similarly, when the second group of burners 22 and the third group of burners 23 keep burning, the degree of heating on the right side of the fourth area 14 of the heat exchanger 1 corresponding to the fourth group of burners 24 is greatly reduced. In this way, whether it is the first group of burners 21 or the fourth group of burners 24, the heating of the left side of the third area 13 of the heat exchanger 1 corresponding to the third group of burners 23 is greatly reduced. When the second group of burners 21 and the fourth group of burners 24 keep burning or when the second group of burners 22 and the third group of burners 23 keep burning, the leftmost part of the third area 13 of the heat exchanger 1 corresponding to the third group of burners 23 or the rightmost part of the fourth area 14 of the heat exchanger 1 corresponding to the fourth group of burners 24 will not be in a high-intensity heating state for a long time. Therefore, the leftmost part of the third area 13 of the heat exchanger 1 corresponding to the third group of burners 23 and the rightmost part of the fourth area 14 of the heat exchanger 1 corresponding to the fourth group of burners 24 are not prone to failure problems, which extends the service life of the gas water heater to a certain extent.

[0151] As described in the background art, in most cases, gas water heaters are heated at a low or medium load relative to full load. In the above method, when the first group of burners 21 and the fourth group of burners 24 are kept burning, or when the second group of burners 22 and the third group of burners 23 are kept burning, or when the first group of burners 21 is kept burning, or when the second group of burners 22 is kept burning, it is just enough to meet the requirement of the gas water heater to heat at a low or medium load. Secondly, not only can different groups of burners in the combustion device 2 be used to mainly heat different areas of the heat exchanger 1, so that different areas of the heat exchanger 1 can participate in the heat exchange and heating process after the gas water heater is started and heated multiple times, but it also avoids the middle area of the heat exchanger 1 from being subjected to high-intensity heat exchange for a long time. This greatly improves the anti-scaling ability of the heat exchanger 1, thereby increasing the life of the heat exchanger 1. In particular, for areas with hard water, the life of the heat exchanger 1 is significantly improved, which can reach about twice the original life of the heat exchanger 1.

[0152] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "essentially consisting of..." describing a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps herein also contemplates an embodiment that is essentially composed of these elements, ingredients, parts or steps. By using the term "may", it is intended to illustrate that any attribute described that "may" include is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0153] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for controlling a gas water heater, characterized in that: The gas water heater comprises a combustion device, which comprises a first group of burners and a second group of burners that can be independently started and stopped; The control method of the gas water heater comprises: When a first preset condition is met, the first group of burners is controlled to start combustion, and the second group of burners is controlled to be in a closed state; When the first preset condition is subsequently met, the second group of burners is controlled to start burning and the first group of burners is controlled to be in an off state, or after the first group of burners is turned on for a first preset number of times, the second group of burners is controlled to start burning and the first group of burners is controlled to be in an off state; The combustion device further includes a third group of burners arranged between the first group of burners and the second group of burners, wherein the third group of burners can be ignited by the first group of burners or the second group of burners in a burning state; when a first preset condition is met, the first group of burners is controlled to start burning first, and when the required load is greater than the load supplied by the first group of burners when the burners are turned on, the first group of burners is controlled to ignite the third group of burners; when the first preset condition is subsequently met, the second group of burners is controlled to start burning first, and when the required load is greater than the load supplied by the second group of burners when the burners are turned on, the second group of burners is controlled to ignite the third group of burners; Alternatively, the combustion device further includes a third group of burners and a fourth group of burners arranged between the first group of burners and the second group of burners, the third group of burners being closer to the second group of burners relative to the fourth group of burners; the third group of burners can be ignited by the second group of burners or the fourth group of burners in a burning state, and the fourth group of burners can be ignited by the first group of burners or the third group of burners in a burning state; when a first preset condition is met, the first group of burners is controlled to start burning first, and when the required load is greater than the load supplied by the first group of burners when starting combustion, the first group of burners is controlled to ignite the fourth group of burners; when the first preset condition is subsequently met, the second group of burners is controlled to start burning first, and when the required load is greater than the load supplied by the second group of burners when starting combustion, the second group of burners is controlled to ignite the third group of burners.

2. The control method of the gas water heater according to claim 1, characterized in that: There is a preset distance between the first group of burners and the second group of burners.

3. The control method of the gas water heater according to claim 1, characterized in that: The first preset condition includes a received water usage signal from a user.

4. The control method of the gas water heater according to claim 3, characterized in that: When the user turns on water use, the first group of burners is controlled to start burning first; when the user turns on water use next time, the second group of burners is controlled to start burning first.

5. The control method of the gas water heater according to claim 3, characterized in that: When the number of times the first group of burners is turned on first meets the first preset number, when the user turns on water use, the second group of burners is controlled to be turned on first.

6. The control method of the gas water heater according to claim 5, characterized in that: The control method of the gas water heater further includes: When the number of times the second group of burners are turned on and burned meets the second preset number, when the user turns on water use, the first group of burners is controlled to start burning first, and the second group of burners is controlled to be in an off state.

7. The control method of the gas water heater according to claim 1, characterized in that: The gas water heater further comprises: at least two gas transmission channels that can be opened and closed independently, the at least two gas transmission channels being respectively provided corresponding to the first group of burners and the second group of burners; Controlling the first group of burners to start combustion specifically includes: opening a gas transmission channel corresponding to the first group of burners to start combustion of the first group of burners; Controlling the second group of burners to start combustion specifically includes: opening the gas transmission channels corresponding to the second group of burners, and starting the second group of burners to burn.

8. The control method of the gas water heater according to claim 7, characterized in that: When the combustion device further includes a third group of burners disposed between the first group of burners and the second group of burners, and the third group of burners can be ignited by the first group of burners or the second group of burners in a burning state, the gas water heater further includes: at least three gas transmission channels that can be independently opened and closed, and the at least three gas transmission channels are respectively disposed corresponding to the first group of burners, the second group of burners, and the third group of burners; When a first preset condition is met, the first group of burners is controlled to start combustion first. When the required load is greater than the load supplied by the first group of burners, the gas supply channel corresponding to the third group of burners is opened, so that the first group of burners ignites the third group of burners. When the first preset condition is subsequently met, the second group of burners is controlled to start combustion first. When the required load is greater than the load supplied by the second group of burners when combustion is started, the gas supply channel corresponding to the third group of burners is opened to enable the second group of burners to ignite the third group of burners.

9. The control method of a gas water heater according to claim 1, wherein: The gas water heater comprises: a first ignition device disposed adjacent to the first group of burners; A second ignition device is provided adjacent to the second group of burners.

10. The control method of a gas water heater according to claim 1, wherein: When the combustion device includes a third group of burners and a fourth group of burners arranged between the first group of burners and the second group of burners, the combustion device further includes a fifth group of burners, the fifth group of burners being located between the third group of burners and the fourth group of burners; The third group of burners can be piloted by the second group of burners or the fifth group of burners in a burning state, and the fourth group of burners can be piloted by the first group of burners or the fifth group of burners in a burning state.

11. A gas water heater, characterized in that: include: heat exchangers; a combustion device disposed opposite to the heat exchanger and capable of supplying heat energy to the heat exchanger; The combustion device comprises at least a first group of burners and a second group of burners, wherein the first group of burners and the second group of burners are separated by a preset distance; The gas water heater includes at least a first working state and a second working state: In the first working state, the first group of burners is in a burning state, and the second group of burners is in a closed state; In the second working state, the second group of burners is in a burning state, and the first group of burners is in a closed state; The combustion device further includes a third group of burners arranged between the first group of burners and the second group of burners, wherein the third group of burners can be ignited by the first group of burners or the second group of burners in a burning state; when a first preset condition is met, the first group of burners is controlled to start burning first, and when the required load is greater than the load supplied by the first group of burners when the burners are turned on, the first group of burners is controlled to ignite the third group of burners; when the first preset condition is subsequently met, the second group of burners is controlled to start burning first, and when the required load is greater than the load supplied by the second group of burners when the burners are turned on, the second group of burners is controlled to ignite the third group of burners; or, The combustion device also includes a third group of burners and a fourth group of burners arranged between the first group of burners and the second group of burners, the third group of burners being closer to the second group of burners relative to the fourth group of burners; the third group of burners can be ignited by the second group of burners or the fourth group of burners in a burning state, and the fourth group of burners can be ignited by the first group of burners or the third group of burners in a burning state; when a first preset condition is met, the first group of burners is controlled to start burning first, and when the required load is greater than the load supplied by the first group of burners when starting combustion, the first group of burners is controlled to ignite the fourth group of burners; when the first preset condition is subsequently met, the second group of burners is controlled to start burning first, and when the required load is greater than the load supplied by the second group of burners when starting combustion, the second group of burners is controlled to ignite the third group of burners.

12. The gas water heater according to claim 11, wherein: The gas water heater comprises: a first ignition device arranged near the first group of burners; and a second ignition device arranged near the second group of burners.

13. The gas water heater according to claim 11, wherein: The gas water heater also includes: a distributor for delivering gas to the combustion device, the distributor including at least two gas delivery channels that can be opened and closed independently, and the at least two gas delivery channels are respectively arranged corresponding to the first group of burners and the second group of burners.

14. The gas water heater according to claim 11, wherein: When the combustion device further includes a third group of burners arranged between the first group of burners and the second group of burners, the gas water heater further includes a third working state and a fourth working state: In the third working state, the first group of burners and the third group of burners are in a burning state, and the second group of burners is in a closed state; In the fourth working state, the second group of burners and the third group of burners are in a burning state, and the first group of burners is in a closed state.

15. The gas water heater according to claim 14, wherein: The gas water heater also includes a distributor for supplying gas to the combustion device, and the distributor includes at least three gas supply channels that can be opened and closed independently, and the at least three gas supply channels are respectively arranged corresponding to the first group of burners, the second group of burners and the third group of burners.

16. The gas water heater according to claim 15, characterized in that: In the third working state, the gas delivery channels corresponding to the first group of burners and the third group of burners are in an open state, and the gas delivery channels corresponding to the second group of burners are in a closed state; In the fourth working state, the gas delivery channels corresponding to the second group of burners and the third group of burners are in an open state, and the gas delivery channels corresponding to the first group of burners are in a closed state.

17. The gas water heater according to claim 11, wherein: When the combustion device further includes a third group of burners arranged between the first group of burners and the second group of burners, the gas water heater further includes a fifth working state, in which the first group of burners, the second group of burners and the third group of burners are in a combustion state.

18. The gas water heater according to claim 11, wherein: When the combustion device further includes a third group of burners arranged between the first group of burners and the second group of burners, the combustion device includes at least three fire bar burners, the first group of burners includes at least one of the fire bar burners, the second group of burners includes at least one of the fire bar burners, and the third group of burners includes at least one of the fire bar burners.

19. The gas water heater according to claim 11, wherein: When the combustion device further includes a third group of burners arranged between the first group of burners and the second group of burners, the first group of burners is arranged opposite to a portion of the heat exchanger, the second group of burners is arranged opposite to a portion of the heat exchanger, and the third group of burners is arranged opposite to a portion of the heat exchanger.

20. The gas water heater according to claim 11, wherein: When the combustion device further includes a third group of burners disposed between the first group of burners and the second group of burners, the first group of burners, the second group of burners and the third group of burners are sequentially disposed in a horizontal direction.

21. The gas water heater according to claim 11, wherein: When the combustion device further includes a third group of burners and a fourth group of burners arranged between the first group of burners and the second group of burners, the combustion device further includes: a distributor for supplying gas to the combustion device, the distributor including at least four gas supply channels that can be independently opened and closed, and the at least four gas supply channels are respectively arranged corresponding to the first group of burners, the second group of burners, the third group of burners and the fourth group of burners.

22. The gas water heater according to claim 21, wherein: In the first working state, the third group of burners and the fourth group of burners are in a closed state; in the second working state, the third group of burners and the fourth group of burners are in a closed state; The gas water heater also includes a third working state and a fourth working state: In the third working state, the first group of burners and the fourth group of burners are in a burning state, and the second group of burners and the third group of burners are in a closed state; In the fourth working state, the second group of burners and the third group of burners are in a burning state, and the first group of burners and the fourth group of burners are in a closed state.

23. The gas water heater according to claim 21, wherein: The combustion device further includes: a fifth group of burners, the fifth group of burners being located between the third group of burners and the fourth group of burners; the distributor including at least five gas transmission channels that can be independently opened and closed, the at least five gas transmission channels being respectively provided corresponding to the first group of burners, the second group of burners, the third group of burners, the fourth group of burners, and the fifth group of burners; In the first working state, the fifth group of burners, the third group of burners and the fourth group of burners are in a closed state; in the second working state, the fifth group of burners, the third group of burners and the fourth group of burners are in a closed state; The gas water heater also includes a third working state and a fourth working state: In the third working state, the first group of burners and the fourth group of burners are in a burning state, and the second group of burners, the third group of burners and the fifth group of burners are in a closed state; in the fourth working state, the second group of burners and the third group of burners are in a burning state, and the first group of burners, the fourth group of burners and the fifth group of burners are in a closed state.

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