A burner segmented combustion switching method and system

Abstract

The present invention relates to a staged combustion switching method and system of a burner. The method comprises: a setting step, setting N stage combustion intervals from the first stage combustion interval to the Nth stage combustion interval of the burner, wherein N is a natural number, setting a jump point for jumping to the combustion interval of the adjacent stage and the heat of the jump point; an inspection step, inspecting the heat required by the burner; a judgment step, judging the relationship between the heat required by the burner obtained in the inspection step and the heat of the jump point set in the setting step, judging whether to continue to perform the following switching step based on the relationship; and a switching step, executing the switching of the combustion interval of the burner. According to the present invention, the automatic switching of the staged combustion of the burner can be accurately and quickly realized.

Description

Technical Field

[0001] The invention relates to a burner control technology, and in particular to a burner segmented combustion switching method and a system thereof. Background Art

[0002] Figure 1 It is a schematic diagram showing the heat output of a burner with only one combustion stage. Based on the technology of using one combustion stage, the prior art has proposed a staged combustion technology of setting multiple stages. For example, Figure 2 is a schematic diagram showing the heat output of a burner having two combustion stages. Figure 1 and Figure 2 In the figure, the horizontal axis is the heat output (unit: kW), and the vertical axis is the gas valve current value or the fire exhaust pressure. Figure 2 Two combustion sections are set in the system: A and B. A means that the combustion slices are partially burned (7 of the 14 combustion slices are burned), and B means that all 14 combustion slices are burned.

[0003] In the existing staged combustion technology, a solution that can achieve accurate and rapid staged combustion switching needs to be proposed. Summary of the invention

[0004] In view of the above problems, the present invention aims to provide a staged combustion switching method and system for a burner that can accurately and quickly realize automatic switching.

[0005] A staged combustion switching method for a burner according to one aspect of the present invention comprises:

[0006] A setting step, setting N combustion intervals from the first combustion interval to the Nth combustion interval of the burner, wherein N is a natural number, and from the first combustion interval to the Nth combustion interval, the number of combustion slices of the burner participating in the combustion increases sequentially, and for each of the N combustion intervals, setting a jump point to jump to an adjacent combustion interval and a heat of the jump point;

[0007] Check the steps to check the heat required by the burner;

[0008] a judging step, judging the relationship between the heat required by the burner obtained in the checking step and the heat of the jump point set in the setting step, and executing the following switching step when the relationship meets the preset judging condition; and

[0009] The switching step switches the combustion range of the burner.

[0010] A staged combustion switching system for a burner according to one aspect of the present invention comprises:

[0011] A setting module, used to set N combustion intervals from the first combustion interval to the Nth combustion interval of the burner, wherein N is a natural number and the number of combustion slices of the burner participating in combustion increases from the first combustion interval to the Nth combustion interval, and for each of the N combustion intervals, a jump point to jump to the combustion interval of the adjacent section and the heat of the jump point are set;

[0012] Check module, used to check the heat required by the burner;

[0013] A judgment module, used for judging the relationship between the heat required by the burner obtained in the inspection module and the heat of each jump point set in the setting module, and when the relationship meets the preset judgment condition, the following switching module is executed to perform an action; and

[0014] The switching module is used to execute the switching of the burner intervals.

[0015] According to the present invention, more flexible and accurate switching can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram showing the heat output of a burner having only one combustion stage.

[0017] Figure 2 is a schematic diagram showing the heat output of a burner having two combustion stages.

[0018] Figure 3 is a schematic diagram showing the switching points in the staged combustion process.

[0019] Figure 4 This is a flowchart showing a staged combustion switching method of a burner according to an embodiment of the present invention.

[0020] Figure 5 This is a flowchart showing a staged combustion switching method of a burner according to still another embodiment of the present invention.

[0021] Figure 6 It is a block diagram showing the structure of the staged combustion switching system of the burner of the present invention. DETAILED DESCRIPTION

[0022] The following is a description of a staged combustion switching method for a burner according to an embodiment of the present invention. Figure 2 The two-stage combustion case shown is used as an example for explanation.

[0023] First, the switching points in the staged combustion process will be described. Figure 3 is a schematic diagram showing the switching points in the staged combustion process.

[0024] like Figure 3 As shown, two combustion sections are set, as shown in A and B, where section A represents partial combustion, section B represents full combustion, and the horizontal axis represents the output heat (unit: KW). Among them, A1 represents the minimum load of section A (nominal value or actual value). A2 represents the maximum load of section A (nominal value or actual value). B1 represents the minimum load of section B (nominal value or actual value). B2 represents the maximum load of section B (nominal value or actual value). And the following 4 switching points (fixed values) are set at the same time:

[0025] (1) A-JP-1: the first jumping point of Section A; (2) A-LP-1: the first landing point of Section A; (3) B-JP-1: the first jumping point of Section B; (4) B-LP-1: the first landing point of Section B.

[0026] Here, first refer to Figure 4 Describe the process of switching from segment A to segment B.

[0027] Figure 4 This is a flowchart showing a staged combustion switching method of a burner according to an embodiment of the present invention.

[0028] Figure 4 The steps shown include:

[0029] S100: Partial combustion in DHW (domestic hot water) mode (i.e. equivalent to Figure 3 The combustion interval of section A);

[0030] S101: Check the heat required by the burner;

[0031] S102: Determine whether the heat required by the burner obtained in step S101 exceeds the heat at the switching point. Figure 3 The first jump point A-JP-1 of segment A in the above example, if the judgment result is yes ( Figure 4 If the result of the judgment is "Y", the same below), then continue to step S103. If the result of the judgment is no ( Figure 4 "N" in the figure, the same below) returns to step S101;

[0032] S103: after a predetermined delay, determine whether the heat required by the burner still exceeds the heat at the switching point. If the determination result is yes, proceed to the following step S104. If the determination result is no, return to step S101. The purpose of setting step S103 is to prevent misjudgment caused by some false signals. It is an optional step, not a necessary step.

[0033] S104: Start the switching action, that is, start switching the combustion range of the burner, so that the combustion range of the burner is switched from section A to section B. The specific switching action can be implemented by, for example, the ACU unit (Automatic Control Unit) and the combustion unit in the burner. The specific switching action is described in detail in the following steps S109 to S115.

[0034] In step S101, the heat required by the burner can be calculated according to the following formula as an embodiment:

[0035] m∆t = c * (DCW flow) * (DHW set temperature – DCW inlet temperature),

[0036] Where c refers to specific heat capacity. Here, as an example, c is taken as 4.187 (specific heat capacity refers to the ability of an object to absorb or dissipate heat. The specific heat capacity of liquid water is different at different temperatures and pressures). DCW (domestic cold water) flow rate refers to the flow rate of cold water flowing into the burner, which is obtained by the water flow sensor. DHW (domestic hot water) set temperature refers to the preset hot water temperature that the burner needs to output. This temperature can be set by the user. DCW inlet temperature refers to the inlet temperature of cold water flowing into the burner, which is measured by the water inlet sensor.

[0037] So far, the first switching logic for switching from section A to section B has been described, that is, whether to switch from section A to section B is determined by determining whether the heat required by the burner exceeds the heat at the switching point. However, in addition to this case, there may be some extreme cases, such as deviations in gas valve production regulation, deviations in gas calorific value, and deviations caused by the influence of altitude, etc. In extreme cases, the actual maximum load point that can be achieved may not reach the originally set A2, and the actual maximum load point that can be achieved may even be lower than the switching point A-JP-1. In this way, when the required heat is within the range between the actual maximum load point that can be achieved and the switching point A-JP-1, it is impossible to switch from section A to section B according to the first switching logic.

[0038] In order to compensate for such an extreme situation, a second switching logic is further set up on the basis of the first switching logic. Figure 4 The second switching logic (step S105 to step S108 ) is described in detail.

[0039] S105: Determine whether the current of the main gas valve of the burner reaches the maximum. If the determination result is yes, proceed to step S106; if the determination result is no, return to step S101;

[0040] S106: Determine whether the main gas valve current of the burner reaches the target current value corresponding to the preset hot water setting temperature. If the determination result is yes, return to step S101; if the determination result is no, proceed to step S107;

[0041] S107: Determine whether the difference between the set hot water temperature and the actual hot water temperature (the difference here refers to a positive value) is greater than a preset value. If the determination result is yes, jump to the switching step (i.e. S104); if the determination result is no, proceed to step S108;

[0042] S108: After a predetermined delay, determine whether the main gas valve current of the burner reaches the target current value corresponding to the preset hot water setting temperature. If the determination result is no, execute the above switching step, i.e., the above step S104. If the determination result is yes, return to step S101.

[0043] Here, in Figure 4 What is illustrated is that the second switching logic is set in parallel with the first switching logic. It can be understood that the subsequent switching action can be performed by satisfying any one of the first switching logic or the second switching logic. This is an embodiment of the present invention. The present invention also includes other transformation methods. For example, instead of setting the second switching logic in parallel, when it is judged in step S102 (i.e., the first switching logic) that it is not switched, the second switching logic is further set (step S105 to step S108). In this way, the setting of the second switching logic can also make up for the shortcomings of the first switching logic in extreme cases. Although this method is not illustrated, it is also included in the protection scope of the present invention.

[0044] Next, continue to refer to Figure 4 Describe the specific actions of the switching steps, including:

[0045] S109: The solenoid valve of the burner is set to an open direction within a certain period of time. Here, the solenoid valve is used to control the number of burner slices participating in the combustion in the A-stage combustion interval and the B-stage second combustion interval, and the opening direction refers to increasing the number of burner slices participating in the combustion. In this embodiment, the solenoid valve of the burner is opened to switch from the A-stage combustion interval in which some of the combustion slices participate in the combustion to the B-stage combustion interval in which all the combustion slices participate in the combustion;

[0046] S110: Reduce the main gas valve current of the burner to make the heat reach Figure 3 The first landing point of Section B is B-LP-1;

[0047] S111: The control action executed based on the PID algorithm is stopped, wherein the PID algorithm is an algorithm for adjusting the main gas valve current by determining the required heat input. The reason for stopping the PID algorithm here is that, in general, the PID algorithm is a set of algorithms for the real-time outlet water temperature, inlet water temperature and set hot water set temperature to quickly determine the required heat input to fine-tune the gas valve current in turn. Normally, the PID is always working, but when the gas valve current is forcibly switched here, if the PID algorithm is also working, it will cause system confusion. Therefore, when the current is forcibly switched, it is best to make the PID not work. Once this forced process is completed, the PID is restored to normal operation (i.e., the following steps S113~S115).

[0048] S112: Determine whether there is a flame failure. If it is determined that there is no flame failure, proceed to the following steps S113 to S115;

[0049] S113: Keep the solenoid valve of the burner in the open direction;

[0050] S114: Execute control actions based on PID algorithm; and

[0051] S115: and adjusting the main gas valve current based on the PID algorithm.

[0052] As described above, the staged combustion switching method of a burner according to an embodiment of the present invention can accurately and quickly switch from the A-stage combustion interval to the B-stage combustion interval when conditions are met.

[0053] Figure 5 This is a flowchart showing a staged combustion switching method of a burner according to still another embodiment of the present invention. Figure 5 It shows the process of switching from the B-segment combustion interval to the A-segment combustion interval.

[0054] like Figure 5 As shown, the staged combustion switching method of the burner according to the embodiment of the present invention comprises the following steps:

[0055] S200: The burner's combustion slices are fully burned, and the entire combustion interval in the DHW mode (i.e., equivalent to Figure 3 The combustion interval of section B);

[0056] S201: Check the heat required by the burner, which is calculated in the same way as in step S101;

[0057] S202: Is the heat required by the burner lower than Figure 3If the result of the judgment is yes, the process proceeds to step S203; if the result of the judgment is no, the process returns to step S201;

[0058] S203: After a specified time has passed, determine whether the heat required by the burner is still lower than Figure 3 The heat result of the first jump point B-JP-1 of the B segment in the embodiment of the present invention is obtained. If the judgment result is yes, the process proceeds to step S204. If the judgment result is no, the process returns to step S201.

[0059] S204: starting the switching action, i.e. starting the switching of the combustion interval of the burner, so that the combustion interval of the burner is switched from the B section to the A section. The specific switching action is described in detail in the following steps S205 to S211;

[0060] S205: The solenoid valve of the burner is set to a closed direction within a certain period of time, wherein the closed direction refers to reducing the number of burner slices participating in the combustion, and here the participation of all the burner slices in the combustion is switched to the participation of some of the burner slices in the combustion;

[0061] S206: Increase the main gas valve current of the burner to make the heat reach Figure 3 The heat of the first landing point A-LP-1 in the A segment;

[0062] S207: Stop the control action based on the PID algorithm;

[0063] S208: If no flame failure is detected, proceed to the following steps S209 ~ S211;

[0064] S209: The solenoid valve of the burner continues to maintain the closing direction;

[0065] S210: Execute control actions based on PID algorithm; and

[0066] S211: Adjust the main gas valve current based on the PID algorithm.

[0067] The present invention is not limited to the case of two-stage combustion intervals, but can also be applied to the case of multiple-stage combustion intervals. The case of multiple-stage combustion intervals will also be described below.

[0068] A staged combustion switching method of a burner according to another embodiment of the present invention comprises the following steps:

[0069] A setting step, setting N combustion intervals from the first combustion interval to the Nth combustion interval of the burner, wherein N is a natural number and the number of combustion segments of the burner participating in combustion increases from the first combustion interval to the Nth combustion interval, and for each of the N combustion intervals, setting the heat of a jump point to jump to an adjacent combustion interval;

[0070] Check the steps to check the heat required by the burner;

[0071] a judging step, judging the relationship between the required output heat of the burner obtained in the checking step and the heat of each jump point set in the setting step, and judging whether to continue with the following switching step according to the relationship; and

[0072] The switching step switches the combustion range of the burner.

[0073] Wherein, in the inspection step, the required heat cm∆t is calculated according to the following formula:

[0074] cm∆t = c * (DCW flow) * (DHW set temperature – DCW inlet temperature). The parameters of the formula are the same as described above.

[0075] An example of setting three combustion zones is described below.

[0076] In this embodiment, three combustion intervals are set, namely, the combustion interval A to the combustion interval C, wherein the combustion interval A and the combustion interval B are Figure 3 The situation shown is similar, with an additional C-stage combustion interval. In this embodiment, the number of combustion pieces participating in the combustion increases successively from the A-stage combustion interval to the C-stage burner interval.

[0077] For section A, A1 is the minimum load of section A, and A2 is the maximum load of section A. For section B, B1 is the minimum load of section B, and B2 is the maximum load of section B. Among them, A-JP-1 is the first jump point of section A, and A-LP-1 is the first landing point of section A; B-JP-1 is the first jump point of section B, and B-LP-1 is the first landing point of section B.

[0078] In this embodiment, segment C is added, and the following points are added:

[0079] C1: minimum load of section C; C2: maximum load of section C; B-JP-2: second jump point of section B; B-LP-2: second landing point of section B;

[0080] C-JP-1: The first jump point of section C; C-LP-1: The first landing point of section C.

[0081] The switching of the combustion intervals that can be performed in this embodiment includes: from section A to section B, from section A to section C, from section B to section C, from section B to section A, from section C to section B, and from section C to section A.

[0082] Specifically, when the combustion zone is located in section A, it is possible to switch from section A to section B and from section A to section C, which is achieved by the following judgment:

[0083] Determine whether the heat required by the burner is lower than the first jump point A-JP-1 of section A. If the determination result is yes, no switching is performed;

[0084] Determine whether the heat required by the burner is between the first jump point A-JP-1 of the A segment and the second jump point B-JP-2 of the B segment. If the determination result is yes, switch the combustion interval from the A segment to the B segment and land at the first landing point B-LP-1 of the B segment.

[0085] Determine whether the heat required by the burner exceeds the second jump point B-JP-2 of segment B. If the judgment result is yes, switch the combustion interval from segment A to segment C and land at the first landing point C-LP-1 of segment C.

[0086] Next, when the combustion zone is located in section B, it is possible to switch from section B to section A and from section B to section C, which is achieved by the following judgment:

[0087] Determine whether the heat required by the burner is lower than the first jump point B-JP-1 of the B segment. If the determination result is yes, switch the combustion interval from the B segment to the A segment and land at the first landing point A-LP-1 of the A segment.

[0088] Determine whether the heat required by the burner is between the first jump point B-JP-1 of segment B and the second jump point B-JP-2 of segment B. If the determination result is no, no switching is performed;

[0089] Determine whether the heat required by the burner exceeds the second jump point B-JP-2 of segment B. If the judgment result is yes, switch from segment B to segment C and land at the first landing point C-LP-1 of segment C.

[0090] In addition, when the combustion zone is located in the C section, it is possible to switch from the C section to the B section and from the C section to the A section, which is achieved by the following judgment:

[0091] Determine whether the heat required by the burner exceeds the first jump point C-JP-1 of the C segment. If the judgment result is no, no switching is performed;

[0092] Determine whether the heat required by the burner is between the first jump point C-JP-1 of the C segment and the first jump point B-JP-1 of the B segment. If the determination result is no, switch from the C segment to the B segment and land at the second landing point B-JP-2 of the B segment.

[0093] Determine whether the heat required by the burner is lower than the first jump point B-JP-1 of segment B. If the judgment result is yes, switch from segment C to segment A and land at the first landing point A-LP-1 of segment A.

[0094] Next, the staged combustion switching system of the burner according to the present invention will be described.

[0095] Figure 6 It is a block diagram showing the structure of the staged combustion switching system of the burner of the present invention.

[0096] like Figure 6 As shown, the staged combustion switching system of the burner of the present invention comprises:

[0097] The setting module 100 is used to set N combustion intervals from the first combustion interval to the Nth combustion interval of the burner, wherein N is a natural number and the number of combustion slices of the burner participating in combustion increases from the first combustion interval to the Nth combustion interval, and for each of the N combustion intervals, the heat of a jump point to jump to the combustion interval of an adjacent section is set;

[0098] The inspection module 200 is used to inspect the heat required by the burner;

[0099] The judging module 300 is used to judge the relationship between the heat required by the burner obtained in the checking module 200 and the heat of each jump point set in the setting module 100, and judge whether to make the following switching module perform an action according to the relationship; and

[0100] The switching module 400 is used to execute the switching of the burner interval based on the judgment result of the judgment module 300 .

[0101] Optionally, the inspection module 200 includes:

[0102] The first acquisition submodule 210 is used to obtain the DCW flow rate, i.e., the cold water flow rate, from the water flow rate sensor;

[0103] The second acquisition submodule 220 is used to obtain the DCW inlet temperature, i.e., the cold water inlet temperature, from the water inlet sensor.

[0104] The initial setting submodule 230 is used to preset the DHW set temperature, i.e., the hot water temperature; and

[0105] The calculation submodule 240 is used to calculate the required heat cm∆t according to the following formula:

[0106] cm∆t = c*(DCW flow)*(DHW set temperature – DCW inlet temperature), where the parameters in the formula are set as described above.

[0107] The present invention also provides a computer-readable medium on which a computer program is stored, characterized in that when the computer program is executed by a processor, the staged combustion switching method of the burner is implemented.

[0108] The present invention also provides a computer device, comprising a storage module, a processor, and a computer program stored in the storage module and executable on the processor, wherein the processor implements the staged combustion switching method of the burner when executing the computer program.

[0109] The above examples mainly illustrate the staged combustion switching method of the burner and the staged combustion switching system of the burner of the present invention. Although only some of the specific embodiments of the present invention are described, it should be understood by those skilled in the art that the present invention can be implemented in many other forms without departing from its subject matter and scope. Therefore, the examples and embodiments shown are regarded as illustrative rather than restrictive, and the present invention may cover various modifications and substitutions without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A staged combustion switching method for a burner, characterized in that: include: A setting step, setting N combustion intervals from the first combustion interval to the Nth combustion interval of the burner, wherein N is a natural number, and from the first combustion interval to the Nth combustion interval, the number of combustion slices of the burner participating in the combustion increases sequentially, and for each of the N combustion intervals, setting a jump point to jump to an adjacent combustion interval and a heat of the jump point; Check the steps to check the heat required by the burner; a judging step, judging the relationship between the heat required by the burner obtained in the checking step and the heat of the jump point set in the setting step, and when the relationship meets the preset judging condition, executing the following switching step; and The switching step switches the combustion range of the burner.

2. The staged combustion switching method of a burner according to claim 1, characterized in that: In the inspection step, the heat cm∆t required by the burner is calculated according to the following formula: cm∆t = c * (DCW flow) * (DHW set temperature – DCW inlet temperature), Where c is the specific heat capacity, DCW flow rate refers to the flow rate of cold water flowing into the burner. DHW set temperature refers to the pre-set hot water temperature that the burner needs to output. DCW inlet temperature refers to the inlet temperature of the cold water flowing into the burner.

3. The staged combustion switching method of a burner according to claim 1, characterized in that: In the setting step, a first combustion interval and a second combustion interval of the burner are set, and a first jump point in the first combustion interval from the first combustion interval to the second combustion interval and a heat amount of the first jump point are set. The judging step comprises: The first judging step is to judge whether the heat required by the burner obtained in the checking step exceeds the heat of the first jump point, and if the judging result is yes, the switching step is executed. In the switching step, switching from the first combustion interval to the second combustion interval is performed.

4. The staged combustion switching method of a burner according to claim 3, characterized in that: The determining step further comprises: a second judging step, judging whether the main gas valve current of the burner reaches the target current value corresponding to the preset target temperature, if the judging result is no, returning to the checking step, if the judging result is yes, continuing to the following third judging step; and a third judging step, judging whether the difference between the target temperature and the actual hot water temperature is greater than a preset value, if the judging result is yes, executing the switching step, if the judging result is no, continuing to perform the following fourth judging step; and The fourth judgment step is to judge whether the main gas valve current of the burner reaches the target current value corresponding to the preset target temperature after a delay of a specified time. If the judgment result is no, the switching step is executed; if the judgment result is yes, the process returns to the checking step.

5. The staged combustion switching method of a burner according to claim 3 or 4, characterized in that: In the setting step, the heat of the first landing point and the first landing point jumping from the first combustion interval to the second combustion interval and landing in the second combustion interval are further set. The switching step includes: The first switching sub-step causes the solenoid valve of the burner to be in the opening direction within a certain period of time, reduces the main gas valve current of the burner so that the heat reaches the heat of the first landing point, and stops the control action performed based on the PID algorithm, wherein the solenoid valve is used to control the number of burner slices participating in the combustion in the first combustion interval and the second combustion interval and the opening direction refers to increasing the number of burner slices participating in the combustion, wherein the PID algorithm is an algorithm for adjusting the main gas valve current by determining the required heat input, If no flame failure is detected after the first switching sub-step, the switching step further comprises: The second switching sub-step enables the solenoid valve of the burner to continue to maintain the opening direction, executes the control action based on the PID algorithm and adjusts the main gas valve current based on the PID algorithm.

6. The staged combustion switching method of a burner according to claim 1, characterized in that: The steps include: In the setting step, a first combustion interval and a second combustion interval of the burner are set, and a second jump point in the second combustion area from the second combustion interval to the first combustion area and a heat of the second jump point are set. In the judging step, it is judged whether the heat required by the burner obtained in the checking step is lower than the heat of the second jump point. If the judging result is yes, the switching step is executed. In the switching step, switching from the second stage combustion interval to the first stage combustion interval is performed.

7. The staged combustion switching method of a burner according to claim 6, characterized in that: In the setting step, the heat of the second landing point and the second landing point in the first combustion interval after jumping from the second combustion interval to the first combustion interval is further set. The switching step includes: The first switching sub-step causes the solenoid valve of the burner to be in the closing direction within a certain period of time, increases the main gas valve current of the burner so that the heat reaches the heat of the second landing point, and stops the control action based on the PID algorithm, wherein the solenoid valve is used to control the number of burner slices participating in the combustion in the first combustion interval and the second combustion interval and the closing direction refers to reducing the number of burner slices participating in the combustion, wherein the PID algorithm is an algorithm for adjusting the main gas valve current by determining the required heat input, In the switching step, if no flame failure is detected after the first switching sub-step, the switching step further includes: The second switching sub-step enables the solenoid valve of the burner to continue to maintain the closing direction, executes the control action based on the PID algorithm and adjusts the main gas valve current based on the PID algorithm.

8. A staged combustion switching system for a burner, characterized in that: include: A setting module, used to set N combustion intervals from the first combustion interval to the Nth combustion interval of the burner, wherein N is a natural number and the number of combustion slices of the burner participating in combustion increases from the first combustion interval to the Nth combustion interval, and for each of the N combustion intervals, a jump point to jump to the combustion interval of the adjacent section and the heat of the jump point are set; Check module, used to check the heat required by the burner; A judgment module, used for judging the relationship between the heat required by the burner obtained in the inspection module and the heat of each jump point set in the setting module, and making the following switching module perform an action when the relationship meets the preset judgment condition; and The switching module is used to execute the switching of the burner intervals.

9. The staged combustion switching system of a burner according to claim 8, characterized in that: The inspection module comprises: The first acquisition submodule is used to obtain the DCW flow rate, i.e., the cold water flow rate, from the water flow rate sensor; The second acquisition submodule is used to obtain the DCW inlet temperature, that is, the cold water inlet temperature, from the water inlet sensor; An initial setting submodule is used to preset a DHW set temperature, i.e., a hot water temperature; and The calculation submodule is used to calculate the required heat cm∆t according to the following formula: cm∆t = c * (DCW flow) * (DHW set temperature – DCW inlet temperature), Where c is the specific heat capacity, DCW flow rate refers to the flow rate of cold water flowing into the burner. DHW set temperature refers to the pre-set hot water temperature that the burner needs to output. DCW inlet temperature refers to the inlet temperature of the cold water flowing into the burner.

10. A computer device comprising a storage module, a processor, and a computer program stored in the storage module and executable on the processor, characterized in that: When the processor executes the computer program, the staged combustion switching method of the burner according to any one of claims 1 to 7 is implemented.

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