CN-121993901-A - Fault self-checking method of water heater, electronic equipment and water heater

CN121993901ACN 121993901 ACN121993901 ACN 121993901ACN-121993901-A

Abstract

The application relates to the technical field of water heaters, in particular to a fault self-checking method of a water heater, electronic equipment and the water heater. The fault self-checking method of the water heater comprises the steps of entering a pre-checking stage to pre-judge whether the water heater has fault risks or not under the condition that the accumulated running time length of the compressor is longer than or equal to the preset accumulated time length, adjusting the running frequency of the compressor to a preset fluorine deficiency judging frequency if the pre-judging water heater has the fault risks, starting an accurate judging stage to accurately determine the fault risks and the fault types when the second current running frequency of the compressor meets the preset frequency conditions, and executing a fault processing program according to the judging result of the fault types of the accurate judging stage. The application can improve the accuracy and timeliness of the fault detection of the water heater.

Inventors

BAI GUOJIAN
OUYANG GUANG
SHI FAN

Assignees

珠海格力电器股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260206

Claims (11)

1. The fault self-checking method of the water heater is characterized in that the water heater comprises a water tank, an external machine and a temperature detection device, wherein the external machine at least comprises an outdoor heat exchanger, a compressor and a four-way reversing valve, and the compressor is a variable-frequency compressor; The fault self-checking method comprises the following steps: The method comprises the steps of entering a pre-detection stage to pre-judge whether a water heater has a fault risk under the condition that the accumulated running time length of the compressor is greater than or equal to a preset accumulated time length, wherein detection parameters based on the pre-judgment of whether the water heater has the fault risk in the pre-detection stage comprise running parameters of the compressor, working state parameters of a four-way reversing valve and fluorine-deficiency protection state parameters of the compressor, the running parameters of the compressor comprise a first current running frequency of the compressor, and the first current running frequency is the current running frequency of the compressor in the pre-detection stage; If the pre-judging water heater has fault risk, adjusting the operating frequency of the compressor to a preset fluorine deficiency judging frequency, and starting an accurate judging stage when the second current operating frequency of the compressor meets a preset frequency condition to accurately determine the fault risk and the fault type, wherein the detection parameters according to which the accurate judging stage accurately determines the fault risk and the fault type comprise the operating parameters of the compressor, the ambient temperature Te of the air inlet side of the outdoor heat exchanger, the inlet pipe temperature Tg of the refrigerant inlet pipe of the outdoor heat exchanger, the water temperature Tw in the water tank and a plurality of temperature parameters in the air suction temperature Tx of the compressor, and the second current operating frequency is the actual current operating frequency after the operating frequency of the compressor is adjusted to the preset fluorine deficiency judging frequency; and executing a fault processing program according to the judging result of the fault type in the accurate judging stage.
2. The fault self-checking method of claim 1, wherein the operating parameters of the compressor further comprise a first current driving power driving the compressor to operate at a first current operating parameter; In the pre-detection stage, pre-judging whether the water heater has a fault risk according to the operation parameters of the compressor, the working state parameters of the four-way reversing valve and the fluorine-deficiency protection state parameters of the compressor, and the pre-judging comprises the following steps: and in a first preset detection duration, if the operating parameters of the compressor, the working state parameters of the four-way reversing valve and the fluorine-deficiency protection state parameters of the compressor meet the following conditions at the same time, determining that the water heater has a fault risk: The first current driving power of the compressor is smaller than or equal to a preset reference power threshold value; The working state parameter of the four-way reversing valve is characterized as a starting state; The parameter of the fluorine-deficiency protection state of the compressor is characterized as a fluorine-deficiency protection effective state; The first current running frequency of the compressor is larger than or equal to a preset frequency threshold value; The preset reference power threshold is determined based on a first current operating frequency of the compressor and working condition compensation power of the compressor, and the working condition compensation power is determined based on an ambient temperature and a lower limit of the ambient temperature at which the compressor can operate.
3. The fault self-checking method according to claim 2, wherein the external machine further comprises an outdoor fan; In the pre-detection stage, according to the operation parameters of the compressor, the working state parameters of the four-way reversing valve and the fluorine-deficiency protection state parameters of the compressor, pre-judging whether the water heater has a fault risk or not, and further comprising: acquiring the fluctuation amplitude of the running current of the outdoor fan within the first preset detection duration; If the fluctuation amplitude is smaller than or equal to a preset fluctuation amplitude and the current rotating speed of the outdoor fan is larger than or equal to a preset rotating speed, continuously determining whether the water heater has a fault risk according to the operation parameters of the compressor, the working state parameters of the four-way reversing valve and the fluorine-deficiency protection state parameters of the compressor; if the fluctuation amplitude is larger than the preset fluctuation amplitude, determining that the outdoor fan is in a fault state, and triggering a fault prompting program of the outdoor fan.
4. The fault self-checking method according to claim 1, wherein in the accurate judging stage, a fault state of the water heater is determined according to an operation parameter of the compressor and a plurality of temperature parameters of the ambient temperature Te, the intake pipe temperature Tg, the water temperature Tw, and the intake air temperature Tx, and a corresponding fault processing program is executed, comprising: if the running parameters of the compressor and a plurality of temperature parameters of the ambient temperature Te, the intake pipe temperature Tg and the suction temperature Tx meet a first judging condition within a second preset detecting duration, determining that the water heater has a fluorine deficiency fault, and executing a first shutdown protection program which cannot be automatically recovered in the fault processing program; If the running parameters of the compressor and a plurality of temperature parameters of the ambient temperature Te, the water temperature Tw and the suction temperature Tx meet a second judging condition within a second preset detection duration, determining that the water heater has a system blockage fault, and executing a second shutdown protection program which cannot be automatically recovered in the fault processing program; and in the second preset detection duration, if the first judgment condition is not met and the second judgment condition is not met, adjusting the current running frequency of the compressor to be the initial running frequency before entering the pre-detection stage, and controlling the water heater to reenter the pre-detection stage.
5. The fault self-checking method according to claim 4, wherein the operation parameter of the compressor and a plurality of temperature parameters among the ambient temperature Te, the intake pipe temperature Tg and the intake air temperature Tx satisfy a first determination condition, including simultaneously satisfying: 1) A second current driving power P second ≤P fluorine ×K1+P compensation of the compressor; 2) A third current operating frequency F actual ≤F fluorine +a of the compressor; 3) A third current operating frequency F actual ≥F fluorine -a of the compressor; 4)Tg<Te-X1; The method comprises the steps of determining P fluorine to be a preset driving power, determining F fluorine to be the preset fluorine deficiency judging frequency, determining P compensation according to the ambient temperature Te and the lower limit of the operable ambient temperature of the compressor, determining a to be a compressor frequency fluctuation allowable value and determining X1 to be a first preset temperature constant.
6. The fault self-checking method according to claim 4, wherein the operation parameter of the compressor and a plurality of temperature parameters among the ambient temperature Te, the water temperature Tw, and the intake air temperature Tx satisfy a second determination condition, including simultaneously satisfying: 1) A second current driving power P second ≤P fluorine ×K1+P compensation of the compressor; 2) A third current operating frequency F actual ≤F fluorine +a of the compressor; 3) A third current operating frequency F actual ≥F fluorine -a of the compressor; 4)Tx≥Te+X2; The third current operating frequency is the current operating frequency of the compressor in the accurate judging stage, P fluorine is preset driving power, F fluorine is the preset fluorine deficiency judging frequency, P compensation is determined according to the detected ambient temperature Te and the lower limit of the operable ambient temperature of the compressor, a is a compressor frequency fluctuation allowable value, and X2 is a second preset temperature constant.
7. The fault self-checking method for the water heater is characterized in that the water heater at least comprises a water tank, an external machine and a temperature detection device, wherein the external machine at least comprises an outdoor heat exchanger, a compressor and a four-way reversing valve, and the temperature detection device is at least used for detecting the ambient temperature Te of the air inlet side of the outdoor heat exchanger and the suction temperature Tx of the suction pipe of the compressor, and the compressor is a constant-frequency compressor; The fault self-checking method comprises the following steps: When the compressor is in a non-defrosting operation state and the temperature detection device has no fault, entering a fault detection stage to determine a fault risk and a fault type, wherein the detection parameters according to which the fault detection stage determines that the fault exists include the ambient temperature Te of the air inlet side of the outdoor heat exchanger and the suction temperature Tx of the suction pipe of the compressor; And executing a fault processing program according to the judging result of the fault type, wherein the fault processing program comprises a third shutdown protection program which can not be automatically recovered.
8. The fault self-checking method according to claim 7, wherein the risk of the fault and the type of the fault are determined according to the following manner: Determining that the water heater has a fluorine deficiency fault if Tx-Te is not less than DeltaT preset and Tx is not less than T preset-suction-t within a third preset detection time period; Wherein Δt preset is a preset temperature difference, and T preset-suction-t is a preset inhalation temperature.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing a method of fault self-checking of a water heater as claimed in any one of claims 1 to 8 when the program is executed by the processor.
10. A water heater comprising a controller or the electronic device of claim 9, wherein the controller is configured to perform the fault self-checking method of the water heater of any one of claims 1 to 8.
11. The water heater as recited in claim 10, further comprising: the feedback communication module is configured to execute fault associated information uploading operation after the water heater determines the fault risk and the fault type, and receive a command remotely issued by operation and maintenance personnel; the feedback communication module comprises a data uploading unit and an instruction receiving unit; The data uploading unit is configured to collect at least one parameter of the ambient temperature Te, the inlet pipe temperature Tg, the water tank water temperature Tw and the air suction temperature Tx, a fault code and a fault judging time of the water heater, which are associated with a fault type, and encrypt and upload the information to a cloud platform; The instruction receiving unit is configured to receive a fault clearing instruction remotely issued by operation and maintenance personnel based on the cloud platform, and after receiving the instruction, the instruction receiving unit feeds back to the controller to verify the effectiveness of the instruction, and after verification, the controller controls the water heater to release the shutdown protection state.

Description

Fault self-checking method of water heater, electronic equipment and water heater Technical Field The application relates to the field of airflow regulating equipment, in particular to a fault self-checking method of a water heater, electronic equipment and the water heater. Background The air energy water heater is widely applied to household and commercial hot water supply scenes by virtue of the advantages of energy conservation and environmental protection, and becomes one of core equipment in a hot water supply system. In the long-term operation process of the air energy water heater, the system is easy to have faults such as refrigerant leakage, insufficient refrigerant or system pipeline blockage, the faults not only can lead to the reduction of the heating efficiency of the water heater and the incapability of normally preparing hot water, influence the use experience of users, but also can lead to the long-term abnormal load state of the compressor, the damage of the compressor is directly caused when serious, the service life of equipment is greatly shortened, and the maintenance cost of the users is increased. In the related art, the detection scheme aiming at the fluorine deficiency and system blockage faults of the air energy water heater is to manually check or set a low pressure sensor or a low pressure switch, and the fault state is judged by detecting the pressure parameters of the system. However, the method can only find and process the faults after the faults occur, so that the faults are processed more laggingly, and the use experience of users is affected. Disclosure of Invention In view of the above, the application provides a fault self-checking method of a water heater, electronic equipment and the water heater, so as to improve the accuracy and timeliness of fault detection of the water heater, reduce equipment maintenance cost and prolong the service life of a compressor. The application provides a fault self-checking method of a water heater, the water heater comprises a water tank, an external machine and a temperature detection device, the external machine at least comprises an outdoor heat exchanger, a compressor and a four-way reversing valve, the fault self-checking method comprises the steps of entering a pre-checking stage to pre-judge whether a fault risk exists in the water heater when the accumulated running time length of the compressor is larger than or equal to the preset accumulated time length, wherein the pre-checking stage pre-judges whether the fault risk exists in the water heater according to detection parameters comprising the running parameters of the compressor, the working state parameters of the four-way reversing valve and the fluorine-deficiency protection state parameters of the compressor, the running parameters of the compressor comprise a first current running frequency of the compressor, the first current running frequency is the running frequency of the compressor in the pre-checking stage if the pre-checking step exists, starting a precise judging stage when the second current running frequency of the compressor meets preset frequency conditions, and determining the fault type accurately, and the temperature of the water heater is in the air inlet channel temperature of the air conditioner is in the air inlet channel according to the temperature type, and the temperature of the air inlet channel is in the temperature condition that the temperature of the air inlet channel is in the temperature of the air inlet channel. Under the condition of adopting the technical scheme, the periodical and pertinence of fault detection can be ensured by setting the grading detection program and taking the accumulated running time of the compressor as the triggering condition of the pre-detection stage, and the resource waste caused by indiscriminate detection is avoided. Further, stable detection working conditions are provided for the accurate judging stage through adjustment and stable control of the current running frequency of the compressor, parameter distortion caused by frequency fluctuation is avoided, accuracy of fault judgment is improved, and continuous damage of the fault working conditions to the compressor can be timely blocked through executing a corresponding fault processing program under the condition that faults are determined to exist, so that the service life of equipment is prolonged. In an alternative implementation manner of the fault self-checking method of the water heater, the operation parameters of the compressor further comprise first current driving power for driving the compressor to operate according to first current operation parameters, in the pre-checking stage, whether the water heater is at fault risk is pre-determined according to the operation parameters of the compressor, the operation state parameters of the four-way reversing valve and the fluorine-deficiency protection state parameters of the compressor, wherein in a f