Zero cold water function starting method and system, intelligent household appliance and storage medium

Abstract

The invention provides a zero cold water function starting method and system, an intelligent household appliance and a storage medium. The starting method comprises the following steps: respectively determining a flow value collected by the flow sensor and a pressure value collected by the pressure sensor; and starting the zero cold water function in response to the situation that the change condition of the flow value and the change condition of the pressure value are matched with a starting condition corresponding to a starting rule. A user can start the zero-cold-water function of the water heater at any water using end at any time by operating the faucet at the water using end, and compared with a mode of starting the zero-cold-water function through the water heater end, the mode of the embodiment is simpler and more convenient to operate. In the embodiment, the opening and closing operation of the faucet is recognized through data of two dimensions of flow and pressure, fluctuation and other influences of a water supply pipeline can be eliminated, and the zero-cold-water function is prevented from being started by mistake.

Description

Technical Field

[0001] This disclosure relates to the field of smart home appliance technology, and in particular to a method, system, smart home appliance, and storage medium for activating the zero-cold-water function of a water heater. Background Technology

[0002] With the improvement of people's quality of life and the promotion and popularization of technologies such as the Internet, big data, artificial intelligence, and voice interaction, more and more traditional lifestyles are gradually changing, and the use of home appliances is gradually moving towards intelligence. While bringing more convenience to users, the functions of various home appliances are also becoming more diversified. The zero cold water function of water heaters realizes the "instant hot water" experience. Users do not need to wait or drain the cold water; they can get hot water as soon as they turn on the hot water tap. At present, there are generally two ways to realize the zero cold water function: (1) continuously heating the water in the pipes, which consumes a lot of energy; (2) starting the zero cold water function before using hot water for preheating, which requires going to the water heater in the kitchen or equipment room to start the zero cold water function, which is more troublesome. Summary of the Invention

[0003] The technical problem to be solved by this disclosure is to overcome the above-mentioned defects in the prior art and provide a method, system, smart home appliance, and storage medium for starting up a zero-cold-water function.

[0004] This disclosure solves the above-mentioned technical problems through the following technical solution:

[0005] Firstly, a method for activating a zero-cold-water function is provided, applied to a water heater, wherein the water heater's hot water outlet is equipped with a flow sensor and a pressure sensor, and the activation method includes:

[0006] The flow rate value collected by the flow sensor and the pressure value collected by the pressure sensor are determined respectively.

[0007] The zero-cold-water function is activated in response to changes in the flow rate and pressure values ​​that match the activation conditions corresponding to the activation rules.

[0008] Optionally, the activation rule is to continuously turn on the tap once for hot water and once for cold water. The activation conditions include: within a first duration, the flow rate first increases and then decreases, and the pressure value does not increase monotonically; and within a second duration, the flow rate is less than or equal to a flow rate threshold, and the pressure value does not decrease monotonically, thus activating the zero cold water function; wherein, the duration between the end of the first duration and the beginning of the second duration is less than or equal to a duration threshold.

[0009] Optionally, the start-up rule is to continuously turn on the tap once for hot water and once for cold water. The start-up conditions include: within a third time period, the flow rate is greater than or equal to a first flow rate threshold and the pressure value is less than a first pressure threshold; within a fourth time period, the flow rate is less than or equal to a second flow rate threshold and the pressure value is greater than or equal to a second pressure threshold; and within a fifth time period, the flow rate is less than or equal to a second flow rate threshold and the pressure value is greater than or equal to a third pressure threshold.

[0010] The duration between the end of the third duration and the beginning of the fourth duration is less than or equal to a duration threshold, and the duration between the end of the fourth duration and the beginning of the fifth duration is less than or equal to a duration threshold. The first pressure threshold is determined based on the pressure value collected by the pressure sensor when no water is used, the second pressure threshold is determined based on the pressure value collected by the pressure sensor during the third duration, and the third pressure threshold is determined based on the pressure value collected by the pressure sensor during the fourth duration.

[0011] Optionally, it also includes:

[0012] In response to a rule adjustment request, new startup conditions matching the rule adjustment request are generated based on a template; wherein, the template includes theoretical flow rate and theoretical pressure values ​​corresponding to turning on hot water once and cold water once.

[0013] Secondly, a zero-cold-water function start-up system is provided for a water heater, wherein the water heater's hot water outlet is equipped with a flow sensor and a pressure sensor, and the start-up system includes:

[0014] The determination module is used to determine the flow rate value collected by the flow sensor and the pressure value collected by the pressure sensor, respectively.

[0015] The control module is used to activate the zero-cold-water function in response to changes in the flow rate and pressure values ​​that match the activation conditions corresponding to the activation rules.

[0016] Optionally, the activation rule is to continuously turn on the tap once for hot water and once for cold water. The activation conditions include: within a first duration, the flow rate first increases and then decreases, and the pressure value does not increase monotonically; and within a second duration, the flow rate is less than or equal to a flow rate threshold, and the pressure value does not decrease monotonically, thus activating the zero cold water function; wherein, the duration between the end of the first duration and the beginning of the second duration is less than or equal to a duration threshold.

[0017] Optionally, the start-up rule is to continuously turn on the tap once for hot water and once for cold water. The start-up conditions include: within a third time period, the flow rate is greater than or equal to a first flow rate threshold and the pressure value is less than a first pressure threshold; within a fourth time period, the flow rate is less than or equal to a second flow rate threshold and the pressure value is greater than or equal to a second pressure threshold; and within a fifth time period, the flow rate is less than or equal to a second flow rate threshold and the pressure value is greater than or equal to a third pressure threshold.

[0018] The duration between the end of the third duration and the beginning of the fourth duration is less than or equal to a duration threshold, and the duration between the end of the fourth duration and the beginning of the fifth duration is less than or equal to a duration threshold. The first pressure threshold is determined based on the pressure value collected by the pressure sensor when no water is used, the second pressure threshold is determined based on the pressure value collected by the pressure sensor during the third duration, and the third pressure threshold is determined based on the pressure value collected by the pressure sensor during the fourth duration.

[0019] Optionally, it also includes:

[0020] The adjustment module, in response to a rule adjustment request, generates new startup conditions that match the rule adjustment request based on a template; wherein, the template includes the theoretical flow rate and theoretical pressure value corresponding to turning on hot water once and cold water once.

[0021] Thirdly, a smart home appliance is provided, including a memory, a processor, and a computer program stored in the memory and used to run on the processor, wherein the processor executes the computer program to implement the startup method of the zero-cold-water function as described in any one of the first aspects.

[0022] Fourthly, a computer-readable storage medium is provided, on which a computer program is stored, wherein when the computer program is executed by a processor, it implements the method for starting the zero-cold-water function as described in any one of the first aspects.

[0023] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this disclosure.

[0024] The positive and progressive effects of this disclosure are as follows: Users can activate the zero-cold-water function of the water heater at any point by operating the faucet at the water outlet. Compared to activating the zero-cold-water function directly at the water heater, this method is simpler to operate. Furthermore, this embodiment uses flow rate and pressure data to identify the opening and closing of the faucet, which can eliminate fluctuations in the water supply pipeline and other influences, preventing accidental activation of the zero-cold-water function. Attached Figure Description

[0025] Figure 1 A flowchart illustrating a method for activating a zero-cold-water function as an exemplary embodiment of this disclosure;

[0026] Figure 2 A schematic diagram illustrating an application scenario of a zero-cold-water function activation method provided in an exemplary embodiment of this disclosure;

[0027] Figure 3 A schematic diagram of curves characterizing the start-up conditions used in a start-up method for a zero-cold-water function provided as an exemplary embodiment of this disclosure;

[0028] Figure 4 This is a schematic diagram of the structure of an electronic device provided as an exemplary embodiment of the present disclosure. Detailed Implementation

[0029] The present disclosure is further illustrated below by way of embodiments, but the present disclosure is not limited to the scope of the embodiments described herein.

[0030] The prefixes such as "first" and "second" used in this disclosure are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this disclosure does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and should not be construed as an unnecessary limitation. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.

[0031] Figure 1 This flowchart illustrates an exemplary embodiment of a zero-cold-water function activation method applied to a water heater. The water heater can be controlled via a voice module, which includes a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, which are then parsed by the voice parsing module. Based on the parsed commands, the controller performs corresponding operations, such as starting the water heater or adjusting the temperature, thereby achieving intelligent control of the water heater and improving the user experience.

[0032] See Figure 2 The hot water outlet of the water heater is equipped with a flow sensor 21 and a pressure sensor 22. The water heater can supply hot water to multiple water outlets along the water supply pipeline through the hot water outlet. The water outlets may include, but are not limited to, at least one of the following: water outlets for shower heads, kitchen water outlets, washbasin water outlets, and balcony sink water outlets.

[0033] See Figure 1 The startup method includes the following steps:

[0034] Step 101: Obtain the flow rate value collected by the flow sensor and the pressure value collected by the pressure sensor respectively.

[0035] The flow rate value collected by the flow sensor represents the water flow rate at the hot water outlet of the water heater, while the pressure value collected by the pressure sensor represents the water pressure at the hot water outlet of the water heater.

[0036] Step 102: In response to changes in flow rate and pressure values ​​that match the startup rules, activate the zero cold water function.

[0037] When the faucet at the water outlet is opened or closed, the pressure and flow rates at the hot water outlet of the water heater change, and the pressure and flow rates differ depending on whether the hot water or cold water is turned on. This embodiment utilizes this principle by installing a flow sensor 21 and a pressure sensor 22 at the hot water outlet of the water heater. Based on the data collected by the flow sensor 21 and pressure sensor 22, the opening and closing operations of the faucet at the water outlet are identified, and corresponding activation rules are formulated. This allows the water heater's zero-cold-water function to be activated by opening and closing the faucet at the water outlet.

[0038] The activation rules can be customized according to actual conditions. For example, activation rules include: turning on the water tap once for hot water and once for cold water; or turning on the tap once for cold water and once for hot water; or turning on the tap twice for hot water and once for cold water. Activation conditions are used to determine the opening and closing of the water tap.

[0039] In this embodiment, the user can activate the water heater's zero-cold-water function at any point by operating the faucet at the water outlet. Compared to activating the zero-cold-water function directly at the water heater, this method is simpler. Furthermore, this embodiment uses flow rate and pressure data to identify the faucet's opening and closing operation, which can eliminate fluctuations in the water supply pipeline and other influences, preventing accidental activation of the zero-cold-water function.

[0040] In one embodiment, the zero-cold-water function is activated by continuously turning on a faucet once for hot water and once for cold water. The corresponding activation conditions include: within a first duration, the flow rate first increases and then decreases, while the pressure value remains monotonically constant; and within a second duration, the flow rate is less than or equal to a flow threshold, while the pressure value remains monotonically constant. The zero-cold-water function is then activated when the duration between the end of the first duration and the beginning of the second duration is less than or equal to a duration threshold.

[0041] Setting the first duration, second duration, and duration threshold is to ensure the continuity of faucet operation and prevent users from misinterpreting two normal water usages as a zero-cold-water function activation request. The first duration, second duration, and duration threshold can be set according to actual needs. The duration threshold can be set to 0, meaning the end of the first duration becomes the start of the second duration. The first duration and second duration can be set to 5 seconds or 3 seconds, depending on the user's faucet operation habits. The first duration and second duration can be the same or different.

[0042] Figure 3 The diagram illustrates the theoretical changes in flow rate and pressure during a series of consecutive hot and cold water cycles, which can be used as the activation condition for the zero-cold-water function. If the changes in flow rate and pressure collected by the flow sensor match the theoretical changes, then the zero-cold-water function of the water heater is activated by the user continuously turning on the hot water and then the cold water.

[0043] See Figure 3 When no water is used, the water pressure at the hot water outlet of the water heater is P0, and the water flow rate is 0. At time t1, the hot water is turned on through a tap at one of the water outlets. As the opening of the hot water valve of the tap increases, the water flow rate gradually increases, and the water pressure decreases from P0 to P1. At time t2, the hot water is turned off. As the opening of the hot water valve of the tap decreases, the water flow rate gradually decreases until it reaches 0, and the water pressure continues to decrease. At time t3, the cold water is turned on. As the opening of the cold water valve of the tap increases, the water pressure decreases from P1 to P2, and the water flow rate remains at 0. At time t4, the cold water is turned off. As the opening of the cold water valve of the tap decreases, the water pressure gradually increases. At time t5, the tap is turned off, and the water pressure returns to P0, and the water flow rate returns to 0.

[0044] The working mechanism of this embodiment is further explained below: If the water heater detects that the flow value collected by the flow sensor increases and the pressure value collected by the pressure sensor decreases, it starts timing; it acquires the flow and pressure values ​​within a first time period. If the flow value first increases and then decreases, and the pressure value remains monotonically unchanged, it continues to acquire the flow and pressure values ​​within a second time period. If the flow value is less than or equal to the flow threshold, and the pressure value remains monotonically unchanged, it determines that the user has continuously turned on the faucet once for hot water and once for cold water, indicating a need for zero cold water, and then activates the water heater's zero cold water function. If either the flow or pressure value within the first or second time period does not meet the activation conditions, it indicates no need for zero cold water, and the zero cold water function does not need to be activated.

[0045] In one embodiment, the activation rule for the zero-cold-water function is to continuously turn on the tap once for hot water and once for cold water. The corresponding activation conditions include: within a third time period, the flow rate is greater than or equal to the first flow rate threshold and the pressure value is less than the first pressure threshold; within a fourth time period, the flow rate is less than or equal to the second flow rate threshold and the pressure value is greater than or equal to the second pressure threshold; and within a fifth time period, the flow rate is less than or equal to the second flow rate threshold and the pressure value is greater than or equal to the third pressure threshold.

[0046] The duration between the end of the third duration and the beginning of the fourth duration is less than or equal to a duration threshold, and the duration between the end of the fourth duration and the beginning of the fifth duration is less than or equal to a duration threshold. The first pressure threshold is determined based on the pressure value collected by the pressure sensor when no water is used, the second pressure threshold is determined based on the pressure value collected by the pressure sensor during the third duration, and the third pressure threshold is determined based on the pressure value collected by the pressure sensor during the fourth duration.

[0047] In this embodiment, the startup conditions are divided into multiple stages:

[0048] Initial stage (stage one) conditions: pressure value P > 0, and no flow rate.

[0049] This stage is the no-water-use stage, and the pressure value during this stage is recorded as the initial pressure P0. When a flow rate is detected and the pressure value begins to decrease, the stage begins, i.e., the hot water-on stage.

[0050] Hot water on stage (stage two) conditions: within the third time period (e.g., 5 seconds), the flow rate Q ≥ Q1 and the pressure P ≤ P1.

[0051] The pressure value measured in the second recording stage is P. T1 .

[0052] The first flow threshold Q1 and the first pressure threshold P1 can be set according to actual needs.

[0053] In one embodiment, the first flow threshold Q1 and the first pressure threshold P1 are determined empirically, for example, the first flow threshold Q1 is set to 1 L / min and the first pressure threshold P1 is set to 90%•P0.

[0054] In one embodiment, the first flow threshold Q1 and the first pressure threshold P1 are determined based on user habits. The maximum flow rate Qmax and the maximum pressure Pmax of the hot water device opened by the user through the furthest faucet are recorded. The first flow threshold Q1 is set to Max{50%•Qmax, 0.5L / min}, and the first pressure threshold P1 is set to 90%•P0, where P0 - P... T1 ≥0.02, thus eliminating fluctuations and other influences.

[0055] The condition for the stage from turning off the hot water to turning on the cold water (stage three) is: the flow rate Q ≤ Q2 and P ≥ P2.

[0056] The pressure value measured in the third stage of recording is P. T2 .

[0057] Q2 can be set close to 0 L / min. P T1 The pressure value measured in stage two is given. Since the pressure value continues to decrease after the hot water is turned on, the pressure value in stage three is generally greater than or equal to the pressure value P in stage two.T1 In one implementation, the second pressure threshold P2 = P T1 In other implementations, the second pressure threshold P2 is set to the minimum pressure during the hot water boiling stage.

[0058] Cold water shut-off stage (stage four) conditions: flow rate Q = 0 L / min and maintained for 3 seconds, and pressure P > P T2 .

[0059] If the above conditions are met, confirm that the user requires zero cold water, and start the zero cold water circulation.

[0060] In this embodiment, the threshold values ​​for each stage are dynamically determined based on the actual conditions of the pipeline.

[0061] In one embodiment, the method further includes: in response to a rule adjustment request, generating new startup conditions that match the rule adjustment request based on a template; wherein the template includes theoretical flow rate values ​​and theoretical pressure values ​​corresponding to turning on hot water once and cold water once.

[0062] In this embodiment, users can configure the activation rules according to their actual needs. Users only need to input the activation rules for the zero cold water function, such as turning on hot water once and then cold water once, or turning on hot water twice and then cold water once, and the system can automatically generate activation conditions for determining the opening and closing of the faucet.

[0063] Corresponding to the aforementioned embodiments of the zero-cold-water function startup method, this disclosure also provides embodiments of the zero-cold-water function startup system.

[0064] This disclosure also provides a schematic diagram of a zero-cold-water function startup system. This system is used to implement the zero-cold-water function startup method provided in any of the above embodiments. The system includes:

[0065] The determination module is used to determine the flow rate value collected by the flow sensor and the pressure value collected by the pressure sensor, respectively.

[0066] The control module is used to activate the zero-cold-water function in response to changes in the flow rate and pressure values ​​that match the activation conditions corresponding to the activation rules.

[0067] Optionally, the activation rule is to continuously turn on the tap once for hot water and once for cold water. The activation conditions include: within a first duration, the flow rate first increases and then decreases, and the pressure value does not increase monotonically; and within a second duration, the flow rate is less than or equal to a flow rate threshold, and the pressure value does not decrease monotonically, thus activating the zero cold water function; wherein, the duration between the end of the first duration and the beginning of the second duration is less than or equal to a duration threshold.

[0068] Optionally, the start-up rule is to continuously turn on the tap once for hot water and once for cold water. The start-up conditions include: within a third time period, the flow rate is greater than or equal to a first flow rate threshold and the pressure value is less than a first pressure threshold; within a fourth time period, the flow rate is less than or equal to a second flow rate threshold and the pressure value is greater than or equal to a second pressure threshold; and within a fifth time period, the flow rate is less than or equal to a second flow rate threshold and the pressure value is greater than or equal to a third pressure threshold.

[0069] The duration between the end of the third duration and the beginning of the fourth duration is less than or equal to a duration threshold, and the duration between the end of the fourth duration and the beginning of the fifth duration is less than or equal to a duration threshold. The first pressure threshold is determined based on the pressure value collected by the pressure sensor when no water is used, the second pressure threshold is determined based on the pressure value collected by the pressure sensor during the third duration, and the third pressure threshold is determined based on the pressure value collected by the pressure sensor during the fourth duration.

[0070] Optionally, it also includes:

[0071] The adjustment module, in response to a rule adjustment request, generates new startup conditions that match the rule adjustment request based on a template; wherein, the template includes the theoretical flow rate and theoretical pressure value corresponding to turning on hot water once and cold water once.

[0072] For the system embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this disclosure according to actual needs.

[0073] Figure 4 This is a schematic diagram of the structure of a smart home appliance according to an example embodiment of the present disclosure. The smart home appliance includes a memory, a processor, and a computer program stored in the memory and used to run on the processor. When the processor executes the computer program, it implements the zero-cold-water function startup method described in any of the above embodiments. Figure 4 The smart home appliance 40 shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments disclosed herein.

[0074] like Figure 4As shown, the smart home appliance 40 can be manifested in the form of a general-purpose computing device, such as a server device. The components of the smart home appliance 40 may include, but are not limited to: at least one processor 41, at least one memory 42, and a bus 43 connecting different system components (including memory 42 and processor 41).

[0075] Bus 43 includes a data bus, an address bus, and a control bus.

[0076] The memory 42 may include volatile memory, such as random access memory (RAM) 421 and / or cache memory 422, and may further include read-only memory (ROM) 423.

[0077] The memory 42 may also include a program tool 425 (or utility) having a set (at least one) program module 424, such program module 424 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0078] The processor 41 executes various functional applications and data processing by running computer programs stored in the memory 42, such as the zero-cold-water function startup method provided in any of the above embodiments.

[0079] The smart home appliance 40 can also communicate with one or more external devices 44 (e.g., keyboards, pointing devices, etc.). This communication can be made through the input / output (I / O) interface 45. Furthermore, the smart home appliance 40 can also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 46. As shown in the figure, the network adapter 46 communicates with other modules of the smart home appliance 40 via a bus 43. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the smart home appliance 40, 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.

[0080] It should be noted that although several units / modules or sub-units / modules of the electronic device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided and embodied by multiple units / modules.

[0081] This disclosure also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the zero-cold-water function startup method provided in any of the above embodiments.

[0082] The readable storage medium may be more specifically adopted, including but not limited to: portable disk, hard disk, random access memory, read-only memory, erasable programmable read-only memory, optical storage device, magnetic storage device, or any suitable combination thereof.

[0083] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the startup method for the zero-cold-water function described in any of the above embodiments.

[0084] The program code for executing the computer program product of this disclosure can be written in any combination of one or more programming languages, and the program code can be executed entirely on a user device, partially on a user device, as a stand-alone software package, partially on a user device and partially on a remote device, or entirely on a remote device.

[0085] While specific embodiments of this disclosure have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this disclosure is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this disclosure, but all such changes and modifications fall within the scope of protection of this disclosure.

Claims

1. A method for starting a zero-cold-water function, characterized in that, Applied to a water heater, the water heater's hot water outlet is equipped with a flow sensor and a pressure sensor, and the starting method includes: The flow rate value collected by the flow sensor and the pressure value collected by the pressure sensor are determined respectively. The zero-cold-water function is activated in response to changes in the flow rate and pressure values ​​that match the activation conditions corresponding to the activation rules.

2. The method for starting the zero-cold-water function according to claim 1, characterized in that, The activation rule is to continuously turn on the tap once for hot water and once for cold water. The activation conditions include: within a first time period, the flow rate first increases and then decreases, and the pressure value does not increase monotonically; and within a second time period, the flow rate is less than or equal to a flow rate threshold, and the pressure value does not decrease monotonically. The zero cold water function is then activated. The time between the end of the first time period and the start of the second time period is less than or equal to a time duration threshold.

3. The method for starting the zero-cold-water function according to claim 1, characterized in that, The start-up rule is to continuously turn on the tap once for hot water and once for cold water. The start-up conditions include: within a third time period, the flow rate is greater than or equal to a first flow rate threshold and the pressure value is less than a first pressure threshold; within a fourth time period, the flow rate is less than or equal to a second flow rate threshold and the pressure value is greater than or equal to a second pressure threshold; and within a fifth time period, the flow rate is less than or equal to a second flow rate threshold and the pressure value is greater than or equal to a third pressure threshold. The duration between the end of the third duration and the beginning of the fourth duration is less than or equal to a duration threshold, and the duration between the end of the fourth duration and the beginning of the fifth duration is less than or equal to a duration threshold. The first pressure threshold is determined based on the pressure value collected by the pressure sensor when no water is used, the second pressure threshold is determined based on the pressure value collected by the pressure sensor during the third duration, and the third pressure threshold is determined based on the pressure value collected by the pressure sensor during the fourth duration.

4. The method for starting the zero-cold-water function according to claim 2 or 3, characterized in that, Also includes: In response to a rule adjustment request, new startup conditions matching the rule adjustment request are generated based on a template; wherein, the template includes theoretical flow rate and theoretical pressure values ​​corresponding to turning on hot water once and cold water once.

5. A start-up system with zero cold water function, characterized in that, Applied to a water heater, the water heater's hot water outlet is equipped with a flow sensor and a pressure sensor, and the start-up system includes: The determination module is used to determine the flow rate value collected by the flow sensor and the pressure value collected by the pressure sensor, respectively. The control module is used to activate the zero-cold-water function in response to changes in the flow rate and pressure values ​​that match the activation conditions corresponding to the activation rules.

6. The zero-cold-water function start-up system according to claim 5, characterized in that, The activation rule is to continuously turn on the tap once for hot water and once for cold water. The activation conditions include: within a first time period, the flow rate first increases and then decreases, and the pressure value does not increase monotonically; and within a second time period, the flow rate is less than or equal to a flow rate threshold, and the pressure value does not decrease monotonically. The zero cold water function is then activated. The time between the end of the first time period and the start of the second time period is less than or equal to a time duration threshold.

7. The zero-cold-water function start-up system according to claim 5, characterized in that, The start-up rule is to continuously turn on the tap once for hot water and once for cold water. The start-up conditions include: within a third time period, the flow rate is greater than or equal to a first flow rate threshold and the pressure value is less than a first pressure threshold; within a fourth time period, the flow rate is less than or equal to a second flow rate threshold and the pressure value is greater than or equal to a second pressure threshold; and within a fifth time period, the flow rate is less than or equal to a second flow rate threshold and the pressure value is greater than or equal to a third pressure threshold. The duration between the end of the third duration and the beginning of the fourth duration is less than or equal to a duration threshold, and the duration between the end of the fourth duration and the beginning of the fifth duration is less than or equal to a duration threshold. The first pressure threshold is determined based on the pressure value collected by the pressure sensor when no water is used, the second pressure threshold is determined based on the pressure value collected by the pressure sensor during the third duration, and the third pressure threshold is determined based on the pressure value collected by the pressure sensor during the fourth duration.

8. The zero-cold-water function start-up system according to claim 6 or 7, characterized in that, Also includes: The adjustment module, in response to a rule adjustment request, generates new startup conditions that match the rule adjustment request based on a template; wherein, the template includes the theoretical flow rate and theoretical pressure value corresponding to turning on hot water once and cold water once.

9. A smart home appliance, comprising a memory, a processor, and a computer program stored in the memory and for running on the processor, characterized in that, When the processor executes the computer program, it implements the startup method for the zero-cold-water function as described in any one of claims 1 to 4.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the startup method of the zero-cold-water function as described in any one of claims 1 to 4.

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