Fault detection method and system for three-way valve in water heater, water heater and medium

Abstract

The application discloses a fault detection method and system of a three-way valve in a water heater, the water heater and a medium. The fault detection method comprises the following steps: determining an actual water pressure value at a water outlet of the water pump, a bathing outlet water temperature of the bathing circuit and a heating outlet water temperature of the heating circuit respectively; and performing fault detection on the three-way valve according to the actual water pressure value, the bathing outlet water temperature and the heating outlet water temperature. The application judges whether the fault preset requirement is met through the actual water pressure value, the bathing outlet water temperature and the heating outlet water temperature, so as to judge whether the three-way valve is faulty. The application can increase the accuracy of fault detection of the three-way valve in the dual-purpose stove, and does not need to increase additional costs.

Description

Technical Field

[0001] This invention relates to the field of fault detection of three-way valves in water heaters, specifically to a fault detection method, system, water heater, and medium for three-way valves in water heaters. Background Technology

[0002] Currently, none of the dual-purpose boilers on the market have a function to detect three-way valve failures. The existing technology only requires adding a water flow detection device to determine whether the three-way valve is faulty based on the water flow status in the heat exchange pipes connected to the heating circuit in the plate heat exchanger. However, adding a water flow detection device will increase costs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art that relies on adding a water flow detection device to detect the failure of a three-way valve, which would increase costs. The present invention provides a method, system, water heater and medium for detecting the failure of a three-way valve in a water heater.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A first aspect provides a method for fault detection of a three-way valve in a water heater, wherein the water heater includes a water pump 101, a heat exchanger 102, a bathing circuit, and a heating circuit, and the three-way valve 103 includes an inlet valve, a first outlet valve, and a second outlet valve. The inlet valve is connected to the hot water outlet of the heat exchanger, the first outlet valve is connected to the bathing circuit, and the second outlet valve is connected to the heating circuit. The fault detection method includes:

[0006] The actual water pressure at the outlet of the water pump, the water temperature at the shower circuit, and the water temperature at the heating circuit are determined respectively.

[0007] The three-way valve is tested for faults based on the actual water pressure value, the bath water temperature, and the heating water temperature.

[0008] Optionally, the step of fault detection of the three-way valve based on the actual water pressure value, the bath water outlet temperature, and the heating water outlet temperature includes:

[0009] Determine whether the actual water pressure value, the shower water temperature, and the heating water temperature meet the fault conditions;

[0010] If so, then the three-way valve is confirmed to be faulty.

[0011] Optionally, the step of fault detection of the three-way valve based on the actual water pressure value, the bath water outlet temperature, and the heating water outlet temperature includes:

[0012] Determine the operating mode of the water heater and the fault conditions that match the operating mode;

[0013] Determine whether the actual water pressure value, the shower water temperature, and the heating water temperature meet the fault conditions;

[0014] If so, then the three-way valve is confirmed to be faulty.

[0015] Optionally, the working mode includes a bathing mode, and the fault conditions matching the bathing mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than a preset water pressure difference value; the difference between the bathing water temperature and the preset bathing temperature is less than a first difference threshold; and the difference between the heating water temperature and the heating not started temperature is greater than a second difference threshold.

[0016] Alternatively, the fault conditions that match the bathing mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the temperature rise of the bathing water outlet temperature within the first preset time period does not match the first preset bathing temperature rise; and the temperature rise of the heating water outlet temperature within the second preset time period does not match the first preset heating temperature rise.

[0017] Optionally, the working mode includes a heating mode, and the fault conditions matching the heating mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than a preset water pressure difference value; the difference between the shower outlet water temperature and the shower non-start temperature is greater than a third difference threshold value; and the difference between the heating outlet water temperature and the preset heating temperature is greater than a fourth difference threshold value.

[0018] Alternatively, the fault conditions that match the heating mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the temperature rise of the shower outlet water temperature within the third preset time period does not match the second preset shower temperature rise; and the temperature rise of the heating outlet water temperature within the fourth preset time period does not match the second preset heating temperature rise.

[0019] Secondly, a fault detection system for a three-way valve in a water heater is provided. The water heater includes a water pump, a heat exchanger, a bathing circuit, and a heating circuit. The three-way valve includes an inlet valve, a first outlet valve, and a second outlet valve. The inlet valve is connected to the hot water outlet of the heat exchanger, the first outlet valve is connected to the bathing circuit, and the second outlet valve is connected to the heating circuit. The fault detection system includes:

[0020] The determination module is used to determine the actual water pressure at the outlet of the water pump, the water temperature at the shower circuit, and the water temperature at the heating circuit, respectively.

[0021] The detection module is used to detect faults in the three-way valve based on the actual water pressure value, the bath water temperature, and the heating water temperature.

[0022] Optionally, the detection module includes:

[0023] The judgment unit is used to determine whether the actual water pressure value, the bath water temperature and the heating water temperature meet the fault conditions; if so, it is the first determination unit.

[0024] The first determining unit is used to determine the fault of the three-way valve.

[0025] Optionally, the detection module includes:

[0026] The second determining unit is used to determine the operating mode of the water heater and the fault conditions that match the operating mode;

[0027] The judgment unit is used to determine whether the actual water pressure value, the bath water temperature and the heating water temperature meet the fault conditions; if so, it is the first determination unit.

[0028] The first determining unit is used to determine the fault of the three-way valve.

[0029] Optionally, the working mode includes a bathing mode, and the fault conditions matching the bathing mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than a preset water pressure difference value; the difference between the bathing water temperature and the preset bathing temperature is less than a first difference threshold; and the difference between the heating water temperature and the heating not started temperature is greater than a second difference threshold.

[0030] Alternatively, the fault conditions that match the bathing mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the temperature rise of the bathing water outlet temperature within the first preset time period does not match the first preset bathing temperature rise; and the temperature rise of the heating water outlet temperature within the second preset time period does not match the first preset heating temperature rise.

[0031] Optionally, the working mode includes a heating mode, and the fault conditions matching the heating mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than a preset water pressure difference value; the difference between the shower outlet water temperature and the shower non-start temperature is greater than a third difference threshold value; and the difference between the heating outlet water temperature and the preset heating temperature is greater than a fourth difference threshold value.

[0032] Alternatively, the fault conditions that match the heating mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the temperature rise of the shower outlet water temperature within the third preset time period does not match the second preset shower temperature rise; and the temperature rise of the heating outlet water temperature within the fourth preset time period does not match the second preset heating temperature rise.

[0033] Thirdly, a water heater is provided, including a memory, a processor, and a computer program stored in the memory and used to run on the processor, characterized in that, when the processor executes the computer program, it implements the fault detection method for the three-way valve in the water heater described in any of the above claims.

[0034] Fourthly, a computer-readable storage medium is provided, on which a computer program is stored, characterized in that, when the computer program is executed by a processor, it implements the fault detection method for the three-way valve in a water heater as described in any of the preceding claims.

[0035] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0036] The positive and progressive effects of this invention are as follows: This invention judges whether the fault preset requirements are met by considering the actual water pressure value, the bathing water temperature and the heating water temperature, thereby determining whether the three-way valve is faulty. This not only increases the accuracy of fault detection of the three-way valve in the dual-purpose boiler, but also does not require additional costs. Attached Figure Description

[0037] Figure 1 A schematic diagram of the structure of a dual-purpose furnace provided for an exemplary embodiment of the present invention;

[0038] Figure 2 A flowchart of a fault detection method for a three-way valve in a water heater provided by an exemplary embodiment of the present invention;

[0039] Figure 3 A flowchart of another method for fault detection of a three-way valve in a water heater provided as an exemplary embodiment of the present invention;

[0040] Figure 4 A schematic diagram of a fault detection system for a three-way valve in a water heater, provided as an exemplary embodiment of the present invention;

[0041] Figure 5 This is a structural diagram of a water heater provided as an exemplary embodiment of the present invention. Detailed Implementation

[0042] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0043] like Figure 1 As shown, the water heater includes a water pump 101, a heat exchanger 102, a bathing circuit, and a heating circuit. The three-way valve 103 includes an inlet valve, a first outlet valve, and a second outlet valve. The inlet valve A is connected to the hot water outlet of the heat exchanger, the first outlet valve B is connected to the bathing circuit, and the second outlet valve C is connected to the heating circuit.

[0044] This embodiment provides a method for fault detection of a three-way valve in a water heater, such as... Figure 2 As shown, the fault detection method includes the following steps:

[0045] Step 201: Determine the actual water pressure at the water pump outlet, the shower outlet water temperature of the shower circuit, and the heating outlet water temperature of the heating circuit.

[0046] The actual water pressure at the water pump outlet D is detected by a water pressure detector inside the water heater. The temperature of the shower water is detected by a temperature sensor on the shower circuit inside the water heater. The temperature of the heating water in the heating circuit is also detected by a temperature sensor on the heating circuit inside the water heater.

[0047] Step 202: Perform fault detection on the three-way valve based on the actual water pressure value, bath water temperature and heating water temperature.

[0048] To prevent misdiagnosis as a water pump malfunction or a fault in other components within the water heater, such as a faulty water level switch controller, sensor, or built-in plate heat exchanger, a more accurate diagnosis is made by assessing three factors: the actual water pressure at the pump outlet, the shower water temperature in the shower circuit, and the heating water temperature in the heating circuit. This allows for a more precise identification of the three-way valve as the malfunction. Relying on only one factor for diagnosis can easily lead to errors. For example, if only water pressure is assessed, some phenomena resembling a three-way valve malfunction may occur when the pump is not running. To determine if the problem lies with the three-way valve, check for small fluctuations in water pressure while the pump is operating. If there is no significant change in water pressure, the problem is confirmed to be a pump malfunction, not a three-way valve issue. Therefore, it is essential to check all three factors: the actual water pressure at the pump outlet, the shower water temperature in the shower circuit, and the heating water temperature in the heating circuit.

[0049] This embodiment determines whether the fault preset requirements are met by considering the actual water pressure value, the shower water temperature, and the heating water temperature, thereby determining whether the three-way valve is faulty. This not only increases the accuracy of fault detection of the three-way valve in the dual-purpose boiler, but also does not require additional costs.

[0050] In one embodiment, step 202 specifically includes: determining whether the actual water pressure value, the shower water temperature, and the heating water temperature meet the fault conditions; if yes, then the three-way valve is determined to be faulty; if no, then the water heater operates normally.

[0051] To determine if a three-way valve is faulty, it's necessary to check if the actual water pressure, shower water temperature, and heating water temperature meet the fault conditions. If they do, the fault can be identified as a three-way valve malfunction. The fault conditions refer to the conditions that must be met to detect a fault in the three-way valve inside the water heater.

[0052] In one embodiment, the operating mode of the water heater and the fault conditions matching the operating mode are determined; it is determined whether the actual water pressure, shower water temperature and heating water temperature meet the fault conditions; if so, the three-way valve is determined to be faulty.

[0053] In this embodiment, the water heater includes different operating modes, and different operating modes correspond to different fault conditions. For example, the water heater includes a bathing mode and a heating mode. When the water heater is in bathing mode, it is necessary to determine whether the actual water pressure, bathing water temperature, and heating water temperature meet the fault conditions corresponding to the bathing mode. If they do, the three-way valve is determined to be faulty. When the water heater is in heating mode, it is necessary to determine whether the actual water pressure, bathing water temperature, and heating water temperature meet the fault conditions corresponding to the heating mode. If they do, the three-way valve is determined to be faulty.

[0054] In this embodiment, by targeting different operating modes of the water heater and judging the fault conditions that match different operating modes, the system can accurately distinguish between different faults under different conditions, thereby more accurately determining whether it is a three-way valve fault and avoiding misjudgment.

[0055] In one embodiment, such as Figure 3 As shown, when the water heater is in shower mode, the fault conditions matching the shower mode include: the difference between the actual water pressure and the standard water pressure when the water heater is not running is greater than the preset water pressure difference; the difference between the shower outlet water temperature and the preset shower temperature is less than the first difference threshold; and the difference between the heating outlet water temperature and the heating not started temperature is greater than the second difference threshold. Alternatively, the fault conditions matching the shower mode include: the difference between the actual water pressure and the standard water pressure when the water heater is not running is greater than the preset water pressure difference; the temperature rise of the shower outlet water temperature within the first preset time period does not match the first preset shower temperature rise; and the temperature rise of the heating outlet water temperature within the second preset time period does not match the first preset heating temperature rise.

[0056] The preset water pressure difference is defined as the difference between the actual water pressure and the standard water pressure when the three-way valve inside the water heater is not malfunctioning. The first difference threshold is the difference between the shower outlet water temperature and the preset shower temperature when the three-way valve inside the water heater is not malfunctioning. The second difference threshold is the difference between the heating outlet water temperature and the heating off-peak temperature when the three-way valve inside the water heater is not malfunctioning. The first preset shower temperature rise is the temperature rise of the shower outlet water within a first preset time period when the three-way valve inside the water heater is not malfunctioning. The first preset heating temperature rise is the temperature rise of the heating outlet water within a second preset time period when the three-way valve inside the water heater is not malfunctioning. The first and second preset time periods can be close in value, and the specific range is not limited; they can be selected according to the needs of the water heater used. Furthermore, the values ​​of the first and second difference thresholds can be set by the user according to the water heater used, without any specific limitations.

[0057] For example: the preset water pressure difference is 0.3 bar, the first preset duration is 10 seconds, the second preset duration is 3 minutes, and the second difference threshold is 10°C; the difference between the actual water pressure and the standard water pressure when the water heater is not running is greater than 0.3 bar, the difference between the shower outlet water temperature and the preset shower temperature is less than the first difference threshold, and the difference between the heating outlet water temperature and the heating not started temperature is less than 10°C; or the fault conditions matching the shower mode include: the difference between the actual water pressure and the standard water pressure when the water heater is not running is greater than 0.3 bar, the shower outlet water temperature is less than the preset shower temperature within 10 seconds, and the first heating outlet water temperature rise is greater than 10°C within 3 minutes, to prevent the heating outlet water temperature from rising slowly when the combustion load is low in the shower mode.

[0058] This embodiment specifically analyzes the fault conditions that must be met when the water heater is in the bathing state, so as to more accurately pinpoint whether the fault is a three-way valve.

[0059] In one embodiment, such as Figure 3As shown, when the water heater is in heating mode, the fault conditions matching the heating mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the difference between the shower outlet water temperature and the shower non-start temperature is greater than the third difference threshold; and the difference between the heating outlet water temperature and the preset heating temperature is greater than the fourth difference threshold. Alternatively, the fault conditions matching the heating mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the temperature rise of the shower outlet water temperature within the third preset time period does not match the second preset shower temperature rise; and the temperature rise of the heating outlet water temperature within the fourth preset time period does not match the second preset heating temperature rise.

[0060] The third difference threshold is based on the difference between the shower outlet water temperature and the shower inactive temperature when the three-way valve inside the water heater is functioning correctly. The fourth difference threshold is based on the difference between the heating outlet water temperature and the preset heating temperature when the three-way valve inside the water heater is functioning correctly. The fourth difference threshold is greater than the second difference threshold plus a fixed temperature difference value, where the fixed temperature difference is the value between the water heater's rated temperature and its shutdown temperature, for example, a fixed temperature difference of 5℃. The second preset shower temperature rise is the temperature rise of the shower outlet water within the third preset time period when the three-way valve inside the water heater is functioning correctly. The second preset heating temperature rise is the temperature rise of the heating outlet water within the fourth preset time period when the three-way valve inside the water heater is functioning correctly. The third and fourth preset durations can be close in value, but the first and third preset durations must be shorter than the second and fourth preset durations. The specific range of these values ​​is not limited and can be selected according to the needs of the water heater used. Furthermore, the values ​​of the first and second difference thresholds can be set according to the water heater used, without specific limitations.

[0061] For example: The preset water pressure difference is 0.3 bar, the third preset duration is 1 minute, the third difference threshold is 3°C, the fourth preset duration is 2 minutes, and the fourth difference threshold is 25°C. The following fault conditions must be met: the difference between the actual water pressure and the standard water pressure when the water heater is not running is greater than 0.3 bar; the difference between the shower outlet water temperature and the shower temperature when not activated is greater than 3°C; and the difference between the heating outlet water temperature and the preset heating temperature is greater than 25°C. Alternatively, fault conditions matching the heating mode include: the difference between the actual water pressure and the standard water pressure when the water heater is not running is greater than 0.3 bar; the temperature rise of the shower outlet water temperature is greater than 3°C within 1 minute; and the difference between the heating outlet water temperature and the preset heating temperature is greater than 25°C within 2 minutes.

[0062] This embodiment specifically analyzes the fault conditions that must be met when the water heater is in heating mode, so as to more accurately pinpoint whether the fault is in the three-way valve.

[0063] This embodiment determines whether the fault preset requirements are met by considering the actual water pressure value, the shower water temperature, and the heating water temperature, thereby determining whether the three-way valve is faulty. This not only increases the accuracy of fault detection of the three-way valve in the dual-purpose boiler, but also does not require additional costs.

[0064] This embodiment provides a schematic diagram of a fault detection system for a three-way valve in a water heater. The water heater includes a water pump, a heat exchanger, a bathing circuit, and a heating circuit. The three-way valve includes an inlet valve, a first outlet valve, and a second outlet valve. The inlet valve is connected to the hot water outlet of the heat exchanger, the first outlet valve is connected to the bathing circuit, and the second outlet valve is connected to the heating circuit. Figure 4 As shown, the fault detection system includes:

[0065] The determination module 401 is used to determine the actual water pressure at the outlet of the water pump, the shower outlet water temperature of the shower circuit, and the heating outlet water temperature of the heating circuit, respectively.

[0066] The detection module 402 is used to detect faults in the three-way valve based on the actual water pressure value, the bath water temperature, and the heating water temperature.

[0067] Optionally, the detection module 402 includes:

[0068] Judgment unit 403 is used to determine whether the actual water pressure value, shower water temperature and heating water temperature meet the fault conditions; if so, it becomes the first determination unit 404.

[0069] The first determining unit 404 is used to determine a three-way valve malfunction.

[0070] Optionally, the detection module 402 includes:

[0071] The second determining unit 405 is used to determine the working mode of the water heater and the fault conditions that match the working mode.

[0072] Judgment unit 403 is used to determine whether the actual water pressure value, shower water temperature and heating water temperature meet the fault conditions; if so, it is the first determination unit.

[0073] The first determining unit 404 is used to determine a three-way valve malfunction.

[0074] Optionally, the operating mode includes a bathing mode, and the fault conditions that match the bathing mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the difference between the bathing outlet water temperature and the preset bathing temperature is less than the first difference threshold; and the difference between the heating outlet water temperature and the heating not started temperature is less than the second difference threshold.

[0075] Alternatively, the fault conditions that match the bathing mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the temperature rise of the bathing water outlet temperature within the first preset time period does not match the first preset bathing temperature rise; and the temperature rise of the heating water outlet temperature within the second preset time period does not match the first preset heating temperature rise.

[0076] Optionally, the operating mode includes a heating mode, and the fault conditions that match the heating mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the difference between the shower outlet water temperature and the shower non-start temperature is greater than the third difference threshold value; and the difference between the heating outlet water temperature and the preset heating temperature is greater than the fourth difference threshold value.

[0077] Alternatively, fault conditions that match the heating mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the temperature rise of the shower outlet water temperature within the third preset time period does not match the temperature rise of the second preset shower water temperature; and the temperature rise of the heating outlet water temperature within the fourth preset time period does not match the temperature rise of the second preset heating water temperature.

[0078] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components shown 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 the present invention according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0079] Figure 5 This is a schematic diagram of a water heater provided as an exemplary embodiment of the present invention. 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, it implements a fault detection method for a three-way valve in the exemplary water heater. Figure 5 The water heater 50 shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

[0080] like Figure 5 As shown, the water heater 50 can be represented as a general-purpose computing device, such as a server device. The components of the water heater 50 may include, but are not limited to: at least one processor 51, at least one memory 52, and a bus 53 connecting different system components (including memory 52 and processor 51).

[0081] Bus 53 includes a data bus, an address bus, and a control bus.

[0082] The memory 52 may include volatile memory, such as random access memory (RAM) 521 and / or cache memory 522, and may further include read-only memory (ROM) 523.

[0083] The memory 52 may also include a program / utility 525 having a set (at least one) of program modules 524, 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.

[0084] The processor 51 executes various functional applications and data processing by running computer programs stored in the memory 52, such as the fault detection method for the three-way valve in the exemplary water heater of the present invention.

[0085] The water heater 50 can also communicate with one or more external devices 54. This communication can be made via input / output (I / O) interface 55. Furthermore, the model-generated device 50 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 network adapter 56. As shown, network adapter 56 communicates with other modules of the model-generated water heater 50 via bus 53. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the model-generated water heater 50, 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.

[0086] It should be noted that although several units / modules or sub-units / modules of the water heater are mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of the present invention, 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.

[0087] This invention also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a fault detection method for a three-way valve in an exemplary water heater according to an embodiment of this invention.

[0088] 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.

[0089] In a possible implementation, the present invention can also be implemented as a program product comprising program code, which, when the program product is run on a terminal device, causes the terminal device to execute a fault detection method for a three-way valve in an exemplary water heater according to an embodiment of the present invention.

[0090] The program code for executing the present invention can be written in any combination of one or more programming languages. The program code can be executed entirely on the user device, partially on the user device, as a standalone software package, partially on the user device and partially on a remote device, or entirely on a remote device.

[0091] It should be understood that in the specific embodiments of the present invention, the terms "first" and "second" serve only as a distinction and do not have any substantial meaning.

[0092] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention 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 the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A method for fault detection of a three-way valve in a water heater, the water heater comprising a water pump, a heat exchanger, a bathing circuit, and a heating circuit, the three-way valve comprising an inlet valve, a first outlet valve, and a second outlet valve, the inlet valve being connected to the hot water outlet of the heat exchanger, the first outlet valve being connected to the bathing circuit, and the second outlet valve being connected to the heating circuit; characterized in that, The fault detection method includes: The actual water pressure at the outlet of the water pump, the water temperature at the shower circuit, and the water temperature at the heating circuit are determined respectively. The three-way valve is tested for faults based on the actual water pressure value, the bath water temperature, and the heating water temperature. The fault detection of the three-way valve based on the actual water pressure value, the bath water outlet temperature, and the heating water outlet temperature includes: Determine the operating mode of the water heater and the fault conditions that match the operating mode; Determine whether the actual water pressure value, the shower water temperature, and the heating water temperature meet the fault conditions; If so, then the three-way valve is confirmed to be faulty; The operating mode includes a bathing mode, and the fault conditions that match the bathing mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than a preset water pressure difference value; the difference between the bathing outlet water temperature and the preset bathing temperature is less than a first difference threshold value; and the difference between the heating outlet water temperature and the heating not started temperature is greater than a second difference threshold value. Alternatively, the fault conditions that match the bathing mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the temperature rise of the bathing water outlet temperature within the first preset time period does not match the first preset bathing temperature rise; and the temperature rise of the heating water outlet temperature within the second preset time period does not match the second preset heating temperature rise.

2. The fault detection method for the three-way valve in a water heater as described in claim 1, characterized in that, The working mode includes a heating mode, and the fault conditions that match the heating mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the difference between the shower outlet water temperature and the shower non-start temperature is greater than the third difference threshold value; and the difference between the heating outlet water temperature and the preset heating temperature is greater than the fourth difference threshold value. Alternatively, the fault conditions that match the heating mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the temperature rise of the shower outlet water temperature within the third preset time period does not match the second preset shower temperature rise; and the temperature rise of the heating outlet water temperature within the fourth preset time period does not match the second preset heating temperature rise.

3. A fault detection system for a three-way valve in a water heater, the water heater comprising a water pump, a heat exchanger, a bathing circuit, and a heating circuit, the three-way valve comprising an inlet valve, a first outlet valve, and a second outlet valve, the inlet valve being connected to the hot water outlet of the heat exchanger, the first outlet valve being connected to the bathing circuit, and the second outlet valve being connected to the heating circuit; characterized in that, The fault detection system includes: The determination module is used to determine the actual water pressure at the outlet of the water pump, the water temperature at the shower circuit, and the water temperature at the heating circuit, respectively. The detection module is used to detect faults in the three-way valve based on the actual water pressure value, the bath water temperature, and the heating water temperature. The detection module includes: The second determining unit is used to determine the operating mode of the water heater and the fault conditions that match the operating mode; The judgment unit is used to determine whether the actual water pressure value, the bath water temperature and the heating water temperature meet the fault conditions; if so, it is the first determination unit. The first determining unit is used to determine the fault of the three-way valve; The operating mode includes a bathing mode, and the fault conditions that match the bathing mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than a preset water pressure difference value; the difference between the bathing outlet water temperature and the preset bathing temperature is less than a first difference threshold value; and the difference between the heating outlet water temperature and the heating not started temperature is greater than a second difference threshold value. Alternatively, the fault conditions that match the bathing mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the temperature rise of the bathing water outlet temperature within the first preset time period does not match the first preset bathing temperature rise; and the temperature rise of the heating water outlet temperature within the second preset time period does not match the second preset heating temperature rise.

4. The fault detection system for the three-way valve in a water heater as described in claim 3, characterized in that, The working mode includes a heating mode, and the fault conditions that match the heating mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the difference between the shower outlet water temperature and the shower non-start temperature is greater than the third difference threshold value; and the difference between the heating outlet water temperature and the preset heating temperature is greater than the fourth difference threshold value. Alternatively, the fault conditions that match the heating mode include: the difference between the actual water pressure value and the standard water pressure value when the water heater is not running is greater than the preset water pressure difference value; the temperature rise of the shower outlet water temperature within the third preset time period does not match the second preset shower temperature rise; and the temperature rise of the heating outlet water temperature within the fourth preset time period does not match the second preset heating temperature rise.

5. A water heater, 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 fault detection method for the three-way valve in the water heater as described in claim 1 or 2.

6. 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 fault detection method for the three-way valve in the water heater as described in claim 1 or 2.

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