Constant temperature control method and system of gas water heater, gas water heater and medium

Abstract

The invention discloses a constant temperature control method and system of a gas water heater, the gas water heater and a medium. The constant temperature control method comprises the steps that temperature related data and flow related data of the gas water heater are obtained; when it is detected that the gas water heater is in the hot water closing state, first flow data are calculated; when it is detected that the gas water heater is in the hot water outlet state again, first demand load data are determined according to the set temperature, the water inlet temperature and the first flow data; cyclically adjusting the first flow data and the first demand load data until the opening degree of the water regulating valve reaches the maximum, and determining corresponding second demand load data; and controlling the gas water heater to burn according to the second demand load data until the outlet water temperature reaches the set temperature. According to the method, when the gas water heater is in the hot water outlet state again, rapid heating is conducted under the small flow, then the water flow is slowly increased, and then the combustion demand load is gradually increased, so that it is guaranteed that the re-outlet water temperature is constant, and the user experience degree is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and in particular to a constant temperature control method and system for a gas water heater, a gas water heater and a medium. Background Art

[0002] Water heaters are household appliances in people's daily lives, and are divided into gas water heaters, electric water heaters and solar water heaters. Gas water heaters use gas as fuel, and transfer heat to cold water flowing through the heat exchange gas by burning and heating to achieve the purpose of preparing hot water.

[0003] In actual use, when the user turns on the faucet again after turning it off for a period of time, a brief cold water phenomenon will occur due to factors such as heat exchange delay, thermal inertia, and system response time. The cold water will flow out of the gas water heater and be directly felt by the user, resulting in a poor experience. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defect in the prior art that when the faucet of a gas water heater is turned off for a period of time and then turned on again, the cold water cannot be heated by the heat exchanger in time, resulting in a poor user experience. A constant temperature control method, system, gas water heater and medium for a gas water heater are provided.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] In a first aspect, the present invention provides a constant temperature control method for a gas water heater, the constant temperature control method comprising:

[0007] Acquire temperature-related data and flow-related data of the gas water heater; the temperature-related data includes at least one of the water inlet temperature, the water outlet temperature and the set temperature;

[0008] When it is detected that the gas water heater is in a hot water off state, first flow data is calculated according to the water inlet temperature, the water outlet temperature, the set temperature and the flow-related data;

[0009] When it is detected that the gas water heater is in a hot water supply state again, determining the first demand load data according to the set temperature, the water inlet temperature and the first flow data;

[0010] Cyclic adjustment is performed on the first flow data and the first demand load data until the opening of the water regulating valve reaches a maximum, and corresponding second demand load data is determined;

[0011] The gas water heater is controlled to burn according to the second demand load data until the outlet water temperature reaches the set temperature.

[0012] Preferably, the step of calculating the first flow data according to the water inlet temperature, the water outlet temperature, the set temperature and the flow-related data comprises:

[0013] Calculate the heat dissipation coefficient according to the water inlet temperature, the water outlet temperature and the set temperature;

[0014] The first flow data is calculated according to the heat dissipation coefficient and the combustion load before the hot water is turned off.

[0015] Preferably, the step of cyclically adjusting the first flow data and the first demand load data until the opening of the water regulating valve reaches the maximum includes:

[0016] In each first preset time period, the first flow data and the first demand load data are cyclically increased by 10% in sequence until the opening of the water regulating valve reaches the maximum.

[0017] Preferably, when it is detected that the gas water heater is in a state of discharging hot water for the first time, the third demand load data is calculated according to the set temperature, the water inlet temperature and the flow-related data;

[0018] The gas water heater is controlled to burn according to the third demand load data until the outlet water temperature reaches the set temperature.

[0019] In a second aspect, the present invention provides a constant temperature control system for a gas water heater, the constant temperature control system comprising:

[0020] An acquisition module, used to acquire temperature-related data and flow-related data of the gas water heater; the temperature-related data includes at least one of an inlet water temperature, an outlet water temperature and a set temperature;

[0021] A first calculation module, for calculating first flow data according to the inlet water temperature, the outlet water temperature, the set temperature and the flow-related data when detecting that the gas water heater is in a hot water off state;

[0022] A first determination module is used to determine the first demand load data according to the set temperature, the water inlet temperature and the first flow data when detecting that the gas water heater is in a state of re-discharging hot water;

[0023] a second determination module, configured to cyclically adjust the first flow data and the first demand load data until the opening of the water regulating valve reaches a maximum, and determine corresponding second demand load data;

[0024] The first control module is used to control the gas water heater to burn according to the second demand load data until the outlet water temperature reaches the set temperature.

[0025] Preferably, the first calculation module includes:

[0026] A first calculation unit, used for calculating a heat dissipation coefficient according to the water inlet temperature, the water outlet temperature and the set temperature;

[0027] The second calculation unit is used to calculate the first flow data according to the heat dissipation coefficient and the combustion load before the hot water is turned off.

[0028] Preferably, the second determining module is specifically used for:

[0029] In each first preset time period, the first flow data and the first demand load data are cyclically increased by 10% in sequence until the opening of the water regulating valve reaches the maximum.

[0030] Preferably, the constant temperature control system further comprises:

[0031] A second calculation module is used to calculate the third demand load data according to the set temperature, the water inlet temperature and the relevant flow data when it is detected that the gas water heater is in a hot water discharge state for the first time;

[0032] The second control module is used to control the gas water heater to burn according to the third demand load data until the outlet water temperature reaches the set temperature.

[0033] In a third aspect, the present invention provides a gas water heater, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the constant temperature control method for the gas water heater as described in the first aspect.

[0034] In a fourth aspect, the present invention provides a computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the constant temperature control method for a gas water heater as described in the first aspect.

[0035] The positive and progressive effects of the present invention are: providing a constant temperature control method, system, gas water heater and medium for a gas water heater, when the gas water heater is in a hot water off state, calculating the first flow data according to the inlet water temperature, outlet water temperature, set temperature and flow related data; when detecting that it is in a hot water outlet state again, determining the first demand load data according to the set temperature, inlet water temperature and the first flow data; cyclically adjusting the first flow data and the first demand load data until the opening of the water regulating valve reaches the maximum, and determining the corresponding second demand load data and maintaining combustion. The present invention ensures that the outlet water temperature is constant again and improves the user experience by using a small flow rate to perform rapid heating when the gas water heater is in a hot water outlet state again, then slowly increasing the water flow rate, and then gradually increasing the combustion demand load. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a first flow chart of a constant temperature control method for a gas water heater according to Embodiment 1 of the present invention.

[0037] Figure 2 This is a second flow chart of the constant temperature control method for a gas water heater according to Embodiment 1 of the present invention.

[0038] Figure 3 This is the third flow chart of the constant temperature control method for a gas water heater according to Embodiment 1 of the present invention.

[0039] Figure 4 This is a schematic diagram of the first module of the constant temperature control system of the gas water heater according to Example 2 of the present invention.

[0040] Figure 5 This is a schematic diagram of the second module of the constant temperature control system of the gas water heater according to Example 2 of the present invention.

[0041] Figure 6 This is a schematic diagram of the hardware structure of the gas water heater according to Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0042] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0043] Example 1

[0044] This embodiment provides a constant temperature control method for a gas water heater. Figure 1 As shown, the constant temperature control method includes:

[0045] S1. Obtaining temperature-related data and flow-related data of the gas water heater; the temperature-related data includes at least one of the water inlet temperature, the water outlet temperature and the set temperature;

[0046] S2. When it is detected that the gas water heater is in a hot water off state, the first flow data is calculated according to the inlet water temperature, the outlet water temperature, the set temperature and the flow related data;

[0047] S3, when it is detected that the gas water heater is in a hot water supply state again, determining the first demand load data according to the set temperature, the water inlet temperature and the first flow data;

[0048] S4, cyclically adjusting the first flow data and the first demand load data until the opening of the water regulating valve reaches the maximum, and determining the corresponding second demand load data;

[0049] S5. Control the gas water heater to burn with the second demand load data until the outlet water temperature reaches the set temperature.

[0050] In this embodiment, the gas water heater includes a water regulating valve, an inlet water temperature sensor and a water flow sensor fixed at the cold water inlet end, an outlet water temperature sensor fixed at the hot water outlet end, a heat exchanger, a burner and a controller. The controller obtains the inlet water temperature, water flow and outlet water temperature in real time through the inlet water temperature sensor, the water flow sensor and the outlet water temperature sensor; the controller also controls the burner to burn and heat water with different demand loads, and controls the opening of the water regulating valve to adjust the water flow. The flow-related data includes real-time water flow and multiple different flow thresholds.

[0051] The first flow threshold is set to 2.8L / min, and the second flow threshold is set to 0L / min. When the outlet water temperature is detected to be the same as the set temperature and both are greater than the inlet water temperature, it indicates that the gas water heater is in a stable combustion state. When the real-time water flow q is detected to be the second flow threshold, it is determined that the gas water heater is in the hot water off state, indicating that the user has turned off the current hot water, and the gas water heater is controlled to start the water servo action. If the real-time water flow q is less than or equal to the first flow threshold but greater than the second flow threshold, it means that the user has reduced the flow of hot water by mistake, and it is determined that the gas water heater is not detected to be in the hot water off state, avoiding misjudgment in subsequent steps.

[0052] When the temperature difference between the set temperature and the outlet water temperature exceeds 4°C, the heat dissipation coefficient is calculated based on the inlet water temperature, outlet water temperature and set temperature, and then the updated first flow data under the corresponding situation is calculated by the combustion load before the hot water state is turned off. When it is detected that the real-time water flow q is greater than or equal to the first flow threshold (for example, 2.8L / min), it is determined that the gas water heater is in the hot water outlet state again. The first demand load data is increased to 120% of the first flow data q1 flow rate to ensure that the water temperature rises faster at a smaller flow rate. Then, every 2s, the first demand load data and the first flow data are increased by 10% respectively until the opening of the water regulating valve reaches the maximum. At this time, the first flow data reaches the maximum, and the second demand load data under the corresponding situation is calculated using the following formula, and then the gas water heater is controlled to burn normally with the second demand load data. When the set temperature is equal to the outlet water temperature, combustion and heating are no longer performed, and the gas water heater maintains normal hot water use.

[0053] Q 需2 =(T 设 -T 进 )*q1

[0054] Among them, T 设 Indicates the set temperature, T 进 represents the inlet water temperature, q1 represents the first flow data, Q 需2 Indicates the second demand load data.

[0055] In one embodiment, Figure 2 As shown, step S2 specifically includes:

[0056] S21, calculating the heat dissipation coefficient according to the water inlet temperature, water outlet temperature and set temperature;

[0057] S22. Calculate the first flow data according to the heat dissipation coefficient and the combustion load before turning off the hot water.

[0058] In this embodiment, the water inlet temperature when the gas water heater is in the hot water off state is the same as that before the gas water heater enters the hot water off state, and the water outlet temperature is the real-time water outlet temperature, which is different from the water outlet temperature before the gas water heater enters the hot water off state. The heat dissipation coefficient and the first flow data are calculated using the following formulas:

[0059] k=(T 出 -T 进 ) / (T 设 -T 进 )

[0060] q1=kQ 关 / ((T 设 -T 进 ))

[0061] Among them, T设 Indicates the set temperature, T 进 represents the inlet water temperature, q1 represents the first flow data, Q 关 It represents the combustion load before turning off the hot water, and k represents the heat dissipation coefficient.

[0062] In one embodiment, step S4 specifically includes:

[0063] In each first preset time period, the first flow data and the first demand load data are cyclically increased by 10% in sequence until the opening of the water regulating valve reaches the maximum.

[0064] In this embodiment, after calculating the smaller first water flow data q1 corresponding to the gas water heater being in the hot water off state, the first demand load data Q is calculated according to the following formula: 需1 In other words, the corresponding demand load data is increased to 120% of the first flow data q1 to ensure that the water temperature rises faster at a smaller flow rate q1. Subsequently, at intervals of 2s in each first preset time period, the first demand load data and the first flow data are increased by 10% each time until the water regulating valve opening reaches the maximum value and the flow rate reaches the maximum value. To ensure that the user perceives very little change in water temperature, it is quickly heated at a small flow rate, and then the water flow rate is slowly increased, and the demand load data is increased again, which ultimately ensures that the water outlet temperature remains stable around the set temperature again, so as to meet the user's demand for continuous surging hot water after turning off the faucet for a period of time and then turning on the faucet again, thereby improving the user's water experience.

[0065] Q 需1 =(T 设 -T 进 )*q1*120%

[0066] q1=q1*110% n

[0067] Q 需1 =Q 需1 *110% n

[0068] Wherein, n represents the number of adjustments.

[0069] In one embodiment, Figure 3 As shown, the constant temperature control method also includes:

[0070] S6. When it is detected that the gas water heater is in a state of discharging hot water for the first time, the third demand load data is calculated according to the set temperature, the water inlet temperature and the flow rate related data;

[0071] S7. Control the gas water heater to burn according to the third demand load data until the outlet water temperature reaches the set temperature.

[0072] It should be noted that when it is detected that the outlet water temperature and inlet water temperature of the gas water heater are the same and both are less than 35°C, and the real-time water flow rate q is greater than or equal to 2.8L / min, it is determined that the gas water heater is in the water heater state for the first time. 需3 =(T 设 -T 进 )*q calculates the third demand load data, controls the gas water heater to burn hot water normally according to the third demand load data, to ensure that the outlet water temperature is the same as the set temperature, so that the gas water heater maintains constant temperature operation.

[0073] In this embodiment, a constant temperature control method for a gas water heater is provided. When the gas water heater is detected to be in a state of discharging hot water again, the first demand load data is determined according to the set temperature, the water inlet temperature and the first flow data; the first flow data and the first demand load data are adjusted cyclically until the opening of the water regulating valve reaches the maximum, and the corresponding second demand load data is determined and combustion is maintained. The present invention ensures that the water outlet temperature is constant again and improves the user experience by using a small flow rate to perform rapid heating when the gas water heater is in a state of discharging hot water again, then slowly increasing the water flow rate, and then gradually increasing the combustion demand load.

[0074] Example 2

[0075] This embodiment provides a constant temperature control system for a gas water heater. Figure 3 As shown, the constant temperature control system includes:

[0076] The acquisition module 210 is used to acquire temperature-related data and flow-related data of the gas water heater; the temperature-related data includes at least one of the water inlet temperature, the water outlet temperature and the set temperature.

[0077] The first calculation module 220 is used to calculate the first flow data according to the inlet water temperature, the outlet water temperature, the set temperature and the flow related data when it is detected that the gas water heater is in the hot water off state.

[0078] The first determination module 230 is used to determine the first demand load data according to the set temperature, the water inlet temperature and the first flow data when it is detected that the gas water heater is in a state of re-discharging hot water;

[0079] The second determination module 240 is used to cyclically adjust the first flow data and the first demand load data until the opening of the water regulating valve reaches the maximum, and determine the corresponding second demand load data;

[0080] The first control module 250 is used to control the gas water heater to burn according to the second demand load data until the outlet water temperature reaches the set temperature.

[0081] In this embodiment, the gas water heater includes a water regulating valve, an inlet water temperature sensor and a water flow sensor fixed at the cold water inlet end, an outlet water temperature sensor fixed at the hot water outlet end, a heat exchanger, a burner and a controller. The controller obtains the inlet water temperature, water flow and outlet water temperature in real time through the inlet water temperature sensor, the water flow sensor and the outlet water temperature sensor; the controller also controls the burner to burn and heat water with different demand loads, and controls the opening of the water regulating valve to adjust the water flow. The flow-related data includes real-time water flow and multiple different flow thresholds.

[0082] The first flow rate threshold is set to 2.8L / min, and the second flow rate threshold is set to 0L / min. When the outlet water temperature is detected to be the same as the set temperature and both are greater than the inlet water temperature, it indicates that the gas water heater is in a stable combustion state. When the first calculation module 220 detects that the real-time water flow rate q is the second flow rate threshold, it is determined that the gas water heater is in a hot water off state, indicating that the user has turned off the current hot water, and the gas water heater is controlled to start the water servo action. If the real-time water flow rate q is less than or equal to the first flow rate threshold but greater than the second flow rate threshold, it means that the user has reduced the flow of hot water by mistake, and it is determined that the gas water heater is not detected to be in a hot water off state, avoiding misjudgment in subsequent steps.

[0083] When the temperature difference between the set temperature and the outlet water temperature exceeds 4°C, the heat dissipation coefficient is calculated according to the inlet water temperature, the outlet water temperature and the set temperature, and then the updated first flow data under the corresponding situation is calculated by the combustion load before the hot water state is turned off. When the first determination module 230 detects that the real-time water flow q is greater than or equal to the first flow threshold (for example, 2.8L / min), it is determined that the gas water heater is in the hot water state again. The first demand load data is increased to 120% of the first flow data q1 flow rate to ensure that the water temperature rises faster at a smaller flow rate. Then, every 2s, the first demand load data and the first flow data are increased by 10% respectively until the opening of the water regulating valve reaches the maximum. At this time, the first flow data reaches the maximum. The second determination module 240 uses the following formula to calculate the second demand load data under the corresponding situation. The first control module 250 then controls the gas water heater to burn normally with the second demand load data. When the set temperature is equal to the outlet water temperature, combustion and heating are no longer performed, and the gas water heater maintains normal hot water use.

[0084] Q 需2 =(T 设 -T 进 )*q1

[0085] Among them, T 设 Indicates the set temperature, T 进 represents the inlet water temperature, q1 represents the first flow data, Q 需2 Indicates the second demand load data.

[0086] In one embodiment, Figure 4 As shown, the first calculation module 220 includes:

[0087] The first calculation unit 221 is used to calculate the heat dissipation coefficient according to the water inlet temperature, the water outlet temperature and the set temperature;

[0088] The second calculation unit 222 is used to calculate the first flow data according to the heat dissipation coefficient and the combustion load before the hot water is turned off.

[0089] In this embodiment, the water inlet temperature when the gas water heater is in the hot water off state is the same as that before the gas water heater enters the hot water off state, and the water outlet temperature is the real-time water outlet temperature, which is different from the water outlet temperature before the gas water heater enters the hot water off state. The first calculation unit 221 and the second calculation unit 222 use the following formulas to calculate the heat dissipation coefficient and the first flow data respectively:

[0090] k=(T 出 -T 进 ) / (T 设 -T 进 )

[0091] q1=kQ 关 / ((T 设 -T 进 ))

[0092] Among them, T 设 Indicates the set temperature, T 进 represents the inlet water temperature, q1 represents the first flow data, Q 关 It represents the combustion load before turning off the hot water, and k represents the heat dissipation coefficient.

[0093] In one embodiment, the second determining module 240 is specifically configured to:

[0094] In each first preset time period, the first flow data and the first demand load data are cyclically increased by 10% in sequence until the opening of the water regulating valve reaches the maximum.

[0095] In this embodiment, after calculating the smaller first water flow data q1 corresponding to the gas water heater being in the hot water off state, the first demand load data Q is calculated according to the following formula: 需1In other words, the corresponding demand load data is increased to 120% of the first flow data q1 to ensure that the water temperature rises faster at a smaller flow rate q1. Subsequently, at intervals of 2s in each first preset time period, the first demand load data and the first flow data are increased by 10% each time until the water regulating valve opening reaches the maximum value and the flow rate reaches the maximum value. To ensure that the user perceives very little change in water temperature, it is quickly heated at a small flow rate, and then the water flow rate is slowly increased, and the demand load data is increased again, which ultimately ensures that the water outlet temperature remains stable around the set temperature again, so as to meet the user's demand for continuous surging hot water after turning off the faucet for a period of time and then turning on the faucet again, thereby improving the user's water experience.

[0096] Q 需1 =(T 设 -T 进 )*q1*120%

[0097] q1=q1*110% n

[0098] Q 需1 =Q 需1 *110% n

[0099] Wherein, n represents the number of adjustments.

[0100] In one embodiment, Figure 4 As shown, the constant temperature control system also includes:

[0101] The second calculation module 260 is used to calculate the third demand load data according to the set temperature, the water inlet temperature and the flow rate related data when it is detected that the gas water heater is in the hot water discharging state for the first time;

[0102] The second control module 270 is used to control the gas water heater to burn according to the third demand load data until the outlet water temperature reaches the set temperature.

[0103] It should be noted that when the second calculation module 260 detects that the outlet water temperature and the inlet water temperature of the gas water heater are the same and both are less than 35°C, and the real-time water flow rate q is greater than or equal to 2.8L / min, it is determined that the gas water heater is in the outlet water heater state for the first time. 需3 =(T 设 -T 进 )*q calculates the third demand load data, and the second control module 270 controls the gas water heater to burn hot water normally according to the third demand load data to ensure that the outlet water temperature is the same as the set temperature, so that the gas water heater maintains constant temperature operation.

[0104] In this embodiment, a constant temperature control system for a gas water heater is provided. When the first calculation module detects that the water heater is in a state of discharging hot water again, the first demand load data is determined according to the set temperature, the water inlet temperature and the first flow data; the second determination module cyclically adjusts the first flow data and the first demand load data until the opening of the water regulating valve reaches the maximum, and determines the corresponding second demand load data and maintains combustion. When the gas water heater is in a state of discharging hot water again, the present invention uses a small flow rate to perform rapid heating, then slowly increases the water flow rate, and then gradually increases the combustion demand load, thereby ensuring that the temperature of the water discharged again is constant and improving the user experience.

[0105] Example 3

[0106] Figure 6 The hardware structure diagram of a gas water heater provided in this embodiment. The water heater includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the constant temperature control method of the gas water heater of embodiment 1 is implemented. Figure 6 The gas water heater 60 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0107] The gas water heater 60 may be in the form of a general computing device, for example, it may be a server device. The components of the gas water heater 60 may include but are not limited to: at least one processor 61, at least one memory 62, and a bus 63 connecting different system components (including the memory 62 and the processor 61).

[0108] The bus 63 includes a data bus, an address bus, and a control bus.

[0109] The memory 62 may include a volatile memory, such as a random access memory (RAM) 621 and / or a cache memory 622 , and may further include a read-only memory (ROM) 623 .

[0110] The memory 62 may also include a program / utility 625 having a set (at least one) of program modules 624, such program modules 624 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0111] The processor 61 executes various functional applications and data processing by running the computer programs stored in the memory 62, such as the constant temperature control method of the gas water heater in Example 1 of the present invention.

[0112] The gas water heater 60 may also communicate with one or more external devices 64 (e.g., keyboards, pointing devices, etc.). Such communication may be performed via an input / output (I / O) interface 65. Furthermore, the model-generated gas water heater 60 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 66. As shown, the network adapter 66 communicates with other modules of the model-generated gas water heater 60 via a bus 63. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the model-generated gas water heater 60, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.

[0113] It should be noted that although several units / modules or sub-units / modules of the water heater are mentioned in the above detailed description, such division is merely exemplary and not mandatory. In fact, according to an embodiment of the present invention, the features and functions of two or more units / modules described above may be embodied in one unit / module. Conversely, the features and functions of one unit / module described above may be further divided to be embodied by multiple units / modules.

[0114] Example 4

[0115] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the constant temperature control method for a gas water heater of Embodiment 1 are implemented.

[0116] The readable storage medium may include but is not limited to: a portable disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical storage device, a magnetic storage device or any suitable combination of the above.

[0117] In a possible implementation manner, the present invention can also be implemented in the form of a program product, which includes a program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps of the constant temperature control method for a gas water heater of Example 1.

[0118] The program code for executing the present invention may be written in any combination of one or more programming languages, and may be executed entirely on a user device, partially on a user device, as an independent software package, partially on a user device and partially on a remote device, or entirely on a remote device.

[0119] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A constant temperature control method for a gas water heater, characterized in that: The constant temperature control method comprises: Acquire temperature-related data and flow-related data of the gas water heater; the temperature-related data includes at least one of the water inlet temperature, the water outlet temperature and the set temperature; When it is detected that the gas water heater is in a hot water off state, first flow data is calculated according to the water inlet temperature, the water outlet temperature, the set temperature and the flow-related data; When it is detected that the gas water heater is in a hot water supply state again, determining first demand load data according to the set temperature, the water inlet temperature and the first flow data; Cyclic adjustment is performed on the first flow data and the first demand load data until the opening of the water regulating valve reaches a maximum, and corresponding second demand load data is determined; The gas water heater is controlled to burn according to the second demand load data until the outlet water temperature reaches the set temperature.

2. The constant temperature control method of a gas water heater according to claim 1, characterized in that: The step of calculating the first flow data according to the water inlet temperature, the water outlet temperature, the set temperature and the flow-related data comprises: Calculate the heat dissipation coefficient according to the water inlet temperature, the water outlet temperature and the set temperature; The first flow data is calculated according to the heat dissipation coefficient and the combustion load before the hot water is turned off.

3. The constant temperature control method of a gas water heater according to claim 2, characterized in that: The step of cyclically adjusting the first flow data and the first demand load data until the opening of the water regulating valve reaches the maximum includes: In each first preset time period, the first flow data and the first demand load data are cyclically increased by 10% in sequence until the opening of the water regulating valve reaches the maximum.

4. The constant temperature control method of a gas water heater according to claim 1, characterized in that: The constant temperature control method also includes: When it is detected that the gas water heater is in a state of discharging hot water for the first time, third demand load data is calculated according to the set temperature, the water inlet temperature and the flow-related data; The gas water heater is controlled to burn according to the third demand load data until the outlet water temperature reaches the set temperature.

5. A constant temperature control system for a gas water heater, characterized in that: The constant temperature control system comprises: An acquisition module, used to acquire temperature-related data and flow-related data of the gas water heater; the temperature-related data includes at least one of an inlet water temperature, an outlet water temperature and a set temperature; A first calculation module, for calculating first flow data according to the inlet water temperature, the outlet water temperature, the set temperature and the flow-related data when detecting that the gas water heater is in a hot water off state; A first determination module is used to determine first demand load data according to the set temperature, the water inlet temperature and the first flow data when detecting that the gas water heater is in a state of re-discharging hot water; a second determination module, configured to cyclically adjust the first flow data and the first demand load data until the opening of the water regulating valve reaches a maximum, and determine corresponding second demand load data; The first control module is used to control the gas water heater to burn according to the second demand load data until the outlet water temperature reaches the set temperature.

6. The constant temperature control system of a gas water heater as claimed in claim 5, characterized in that: The first computing module comprises: A first calculation unit, used for calculating a heat dissipation coefficient according to the water inlet temperature, the water outlet temperature and the set temperature; The second calculation unit is used to calculate the first flow data according to the heat dissipation coefficient and the combustion load before the hot water is turned off.

7. The constant temperature control system of a gas water heater as claimed in claim 6, characterized in that: The second determining module is specifically used for: In each first preset time period, the first flow data and the first demand load data are cyclically increased by 10% in sequence until the opening of the water regulating valve reaches the maximum.

8. The constant temperature control system for a gas water heater according to claim 5, characterized in that: The constant temperature control system also includes: A second calculation module is used to calculate the third demand load data according to the set temperature, the water inlet temperature and the flow-related data when it is detected that the gas water heater is in a hot water discharge state for the first time; The second control module is used to control the gas water heater to burn according to the third demand load data until the outlet water temperature reaches the set temperature.

9. A gas water heater, characterized in that: The invention comprises a processor, a memory and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the constant temperature control method for a gas water heater as claimed in any one of claims 1 to 4 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the constant temperature control method for a gas water heater as described in any one of claims 1 to 4 is implemented.

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