Dry burning determination method, air energy water heater, device and storage medium

Abstract

The invention provides a dry burning determination method, an air energy water heater, a device and a storage medium, the method is applied to the air energy water heater, the air energy water heater comprises a heat exchange water tank and a compressor, and a gaseous refrigerant output by the compressor is subjected to heat conversion in the heat exchange water tank; the method comprises the steps that the water temperature variable quantity of a heat exchange water tank, the air temperature variable quantity of a gaseous refrigerant output by a compressor and the environment temperature of the space where the air energy water heater is located are obtained, and a water temperature threshold value and an air temperature threshold value corresponding to the environment temperature are determined; and when the water temperature variation is larger than or equal to the water temperature threshold value and the air temperature variation is larger than or equal to the air temperature threshold value, it is determined that the heat conversion state of the heat exchange water tank is a dry burning state. The method can accurately determine that the heat conversion state of the heat exchange water tank is the dry burning state.

Description

Technical Field

[0001] This application relates to the field of electrical equipment, and more specifically, to a dry burning determination method, an air energy water heater, a device, and a storage medium. Background Art

[0002] Due to advantages such as energy conservation, environmental protection, high safety, long service life, all-weather operation, and intelligent control, air energy water heaters have a great advantage in replacing traditional electric water heaters and gas water heaters. Currently, the installation and commissioning of air energy water heaters provided with real estate may be carried out by different staff. Since there are a large number of heat pump water heaters provided with real estate, there may be a situation where the water tank is not filled with water after commissioning and is used, resulting in long-term dry burning operation. The system will frequently have high-pressure protection, seriously affecting the use safety and service life of the air energy water heater. Summary of the Invention

[0003] This application provides a dry burning determination method, an air energy water heater, a device, and a storage medium. This method can accurately determine that the heat conversion state of the heat exchange water tank is a dry burning state.

[0004] In a first aspect, a dry burning determination method is provided, which is applied to an air energy water heater. The air energy water heater includes a heat exchange water tank and a compressor. The gaseous refrigerant output by the compressor undergoes heat conversion in the heat exchange water tank. The method includes: obtaining the water temperature change amount of the heat exchange water tank, the air temperature change amount of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air energy water heater is located; determining the water temperature threshold value and the air temperature threshold value corresponding to the ambient temperature; and when the water temperature change amount is greater than or equal to the water temperature threshold value and the air temperature change amount is greater than or equal to the air temperature threshold value, determining that the heat conversion state of the heat exchange water tank is a dry burning state.

[0005] In a second aspect, a dry burning determination device is provided, which is applied to an air energy water heater. The air energy water heater includes a heat exchange water tank and a compressor. The refrigerant output by the compressor undergoes heat conversion in the heat exchange water tank. The device includes: an obtaining unit, configured to obtain the water temperature change amount of the heat exchange water tank, the air temperature change amount of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air energy water heater is located; a first determination unit, configured to determine the water temperature threshold value and the air temperature threshold value corresponding to the ambient temperature; and a second determination unit, configured to determine that the heat conversion state of the heat exchange water tank is a dry burning state when the water temperature change amount is greater than or equal to the water temperature threshold value and the air temperature change amount is greater than or equal to the air temperature threshold value.

[0006] In a third aspect, an air energy water heater is provided, including: a memory, configured to store executable program code; and a processor, configured to call and run the executable program code from the memory, so that the air energy water heater executes the method in the first aspect or any possible implementation manner of the first aspect.

[0007] Fourthly, a computer program product is provided, which includes computer program code that, when running on a computer, causes the computer to execute the method in the first aspect or any possible implementation manner of the first aspect as described above.

[0008] Fifthly, a computer-readable storage medium is provided, which stores computer program code that, when running on a computer, causes the computer to execute the method in the first aspect or any possible implementation manner of the first aspect as described above.

[0009] In the embodiments of the present application, by obtaining the water temperature change amount of the heat exchange water tank, the air temperature change amount of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air energy water heater is located, the water temperature threshold and the air temperature threshold corresponding to the ambient temperature are determined. Furthermore, when the water temperature change amount is greater than or equal to the water temperature threshold and the air temperature change amount is greater than or equal to the air temperature threshold, it is determined that the heat conversion state of the heat exchange water tank is the dry burning state. In the case where the heat conversion state of the heat exchange water tank is the dry burning state, the refrigerant output by the compressor heats the air in the heat exchange water tank. Since the air density is less than the water density, the heat conversion is relatively fast, resulting in the air energy water heater frequently triggering high-pressure protection and affecting the refrigerant circulation. Therefore, by combining the air temperature change amount of the refrigerant and the water temperature change amount of the heat exchange water tank, the heat conversion state of the heat exchange water tank can be accurately judged; and the heat conversion efficiency of the refrigerant during the refrigerant circulation process and the influence of the ambient temperature on the water temperature change in the water tank are fully considered. Thus, the water temperature threshold and the air temperature threshold corresponding to the ambient temperature are determined, further improving the accuracy of determining that the heat conversion of the heat exchange water tank is in the dry burning state and avoiding misjudgment. Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of an air energy water heater provided by an embodiment of the present application;

[0011] Figure 2 is a schematic flowchart of a dry burning determination method provided by an embodiment of the present application;

[0012] Figure 3 is a schematic flowchart of a dry burning determination method provided by an embodiment of the present application;

[0013] Figure 4 is a schematic flowchart of a dry burning determination method provided by an embodiment of the present application;

[0014] Figure 5 is a schematic structural diagram of a dry burning determination device provided by an embodiment of the present application;

[0015] Figure 6 is a schematic structural diagram of an air energy water heater provided by an embodiment of the present application.

[0016] Description of Reference Numerals:

[0017] 1. Compressor; 2. Four-way valve; 3. Outdoor heat exchanger; 4. Electronic expansion valve; 5. Heat exchange water tank; 6. Exhaust temperature detection component; 7. Ambient temperature detection component; 8. First water temperature detection component; 9. Second water temperature detection component. Detailed Embodiment

[0018] The technical solutions in the present application will be clearly and elaborately described below with reference to the accompanying drawings. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means "or". For example, A / B may represent A or B. The "and / or" in the text is only a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.

[0019] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as implying or suggesting relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0020] Figure 1 It is a schematic structural diagram of an air energy water heater provided by an embodiment of the present application.

[0021] An air energy water heater, also known as an "air source heat pump water heater", works as follows: A small amount of electric energy is used to drive the compressor to operate. The high-pressure liquid refrigerant is throttled and depressurized by the electronic expansion valve 4 and then absorbs a large amount of heat energy in the air in the outdoor heat exchanger 3 to be converted into a gaseous refrigerant. Then, the gaseous refrigerant is transported to the compressor 1, compressed by the compressor 1 into a high-temperature and high-pressure gaseous refrigerant, and then enters the heat exchange water tank 5 through the four-way valve 2 for heat conversion (releasing heat). The gaseous refrigerant is converted into a liquid refrigerant and enters the electronic expansion valve 4, and the refrigerant circulates for heat conversion to heat the water in the heat exchange water tank 5.

[0022] In the case where there is no water in the heat exchange water tank, the high-temperature and high-pressure gaseous refrigerant continues to heat the heat exchange water tank, the temperature of the heat exchange water tank continues to rise, and the system pressure of the air source heat pump water heater increases. In the related art, when it is detected that the system pressure is too high, the high-pressure switch will automatically trigger high-pressure protection, and the air source heat pump water heater stops working; after the temperature of the heat exchange water tank returns to the normal temperature, the system pressure decreases, and the air source heat pump water heater starts to work and continues to perform heat conversion in the heat exchange water tank, and so on in a cycle. Triggering the system high-pressure protection by detecting the increase in pressure requires frequently turning on or off the high-pressure switch to control the start and stop of the air source heat pump water heater, and when it repeatedly starts the system to work, the temperature of the heat exchange water tank is relatively high, which damages the components of the air source heat pump water heater.

[0023] Based on this, the present application proposes a dry-burning determination method, which can obtain the water temperature change amount of the heat exchange water tank, the air temperature change amount of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air source heat pump water heater is located, determine the water temperature threshold and the air temperature threshold corresponding to the ambient temperature, and then when the water temperature change amount is greater than or equal to the water temperature threshold and the air temperature change amount is greater than or equal to the air temperature threshold, determine that the heat conversion state of the heat exchange water tank is the dry-burning state. In the case where the heat conversion state of the heat exchange water tank is the dry-burning state, the refrigerant output by the compressor heats the air in the heat exchange water tank. Since the air density is less than the water density, the heat conversion is relatively fast, resulting in the air source heat pump water heater frequently triggering high-pressure protection and affecting the refrigerant circulation. Therefore, by combining the air temperature change amount of the refrigerant and the water temperature change amount of the heat exchange water tank, the heat conversion state of the heat exchange water tank can be accurately judged; and the heat conversion efficiency of the refrigerant during the refrigerant circulation process and the influence of the ambient temperature on the water temperature change in the water tank are fully considered. Therefore, the water temperature threshold and the air temperature threshold are determined by the ambient temperature, further improving the accuracy of determining that the heat conversion of the heat exchange water tank is in the dry-burning state and avoiding misjudgment.

[0024] Based on Figure 1 the structural schematic diagram shown below, the dry-burning determination method provided by the embodiments of the present application will be introduced in detail in combination with Figures 2 - 4 .

[0025] Please refer to Figure 2 , which is a flowchart of a dry-burning determination method provided by an embodiment of the present application. As Figure 2 shown, the method of the embodiment of the present application may include the following steps S101-S103.

[0026] S101, obtain the water temperature change amount of the heat exchange water tank, the air temperature change amount of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air source heat pump water heater is located;

[0027] In one embodiment, the temperature change of the heat exchange water tank can be the temperature change value detected in the heat exchange water tank at different times; the temperature change of the air can be the temperature change value of the refrigerant output from the outlet of the compressor detected at different times.

[0028] Optionally, please continue to refer to Figure 1 , the air energy water heater further includes an exhaust temperature detection component 6, an ambient temperature detection component 7, and a water temperature detection component. Among them, the exhaust temperature detection component 6 can be installed at the outlet of the compressor, so that the gas temperature of the refrigerant output from the outlet of the compressor at different times can be obtained, and the temperature change of the air can be calculated; the ambient temperature detection component 7 can be installed on the outdoor heat exchanger 3. When the outdoor heat exchanger 3 evaporates the liquid refrigerant into a gaseous refrigerant, it needs to absorb the air heat of the outdoor air. Thus, the ambient temperature of the space where the air energy water heater is located can be obtained through the ambient temperature detection component 7; the water temperature detection component can be installed at the middle position of the heat exchange water tank in the vertical direction to avoid inaccurate temperature collected by the water temperature detection component due to uneven temperature distribution inside the heat exchange water tank.

[0029] In one embodiment, the temperature change of the water and the temperature change of the air can be calculated by obtaining the difference between the water temperature and the air temperature collected at a certain time interval. Exemplarily, during the operation of the air energy water pump, the water temperature detection component collects the water temperature of the heat exchange water tank at the current moment as 12 °C (degrees Celsius), the ambient temperature detected by the ambient temperature detection component is 15 °C, and the air temperature detected by the exhaust temperature detection component at the outlet of the compressor is 20 °C. After 10 minutes, the water temperature detection component collects the water temperature of the heat exchange water tank at the current moment as 32 °C, and the air temperature detected by the exhaust temperature detection component at the outlet of the compressor is 50 °C. Then, the temperature change of the water is 20 °C and the temperature change of the air is 30 °C.

[0030] S102, determine the water temperature threshold and the air temperature threshold corresponding to the ambient temperature;

[0031] In one embodiment, after the ambient temperature detection component collects the ambient temperature of the space where the water heater is located, the water temperature threshold and the air temperature threshold corresponding to the ambient temperature are further determined. The water temperature threshold is used to determine whether the change in the water temperature of the heat exchange water tank meets the judgment condition when the heat conversion state of the heat exchange water tank is in the dry burning state, and the air temperature threshold is used to determine whether the change in the air temperature at the outlet of the compressor meets the judgment condition when the heat conversion state of the heat exchange water tank is in the dry burning state. It can be understood that when there is water in the heat exchange water tank, the high-temperature and high-pressure gaseous refrigerant output from the compressor performs heat conversion with the water in the heat exchange water tank to heat the water in the heat exchange water tank, and the heat conversion state of the heat exchange water tank is in the hot water heating state; when there is no water in the heat exchange water tank, the high-temperature and high-pressure gaseous refrigerant output from the compressor heats the heat exchange water tank without water, resulting in a rapid rise in the temperature of the heat exchange water tank. At this time, the heat conversion state of the heat exchange water tank is in the dry burning state.

[0032] In one embodiment, the water temperature threshold and the air temperature threshold corresponding to the ambient temperature can be determined through a calculation formula.

[0033] S103. When the change in water temperature is greater than or equal to the water temperature threshold and the change in air temperature is greater than or equal to the air temperature threshold, it is determined that the heat conversion state of the heat exchange water tank is in the dry burning state.

[0034] In one embodiment, when it is determined that the change in water temperature is greater than or equal to the water temperature threshold, it is determined that the change in the water temperature of the heat exchange water tank meets the judgment condition when the heat conversion state of the heat exchange water tank is in the dry burning state; when it is determined that the change in air temperature is greater than or equal to the air temperature threshold, it is determined whether the change in the air temperature at the outlet of the compressor meets the judgment condition when the heat conversion state of the heat exchange water tank is in the dry burning state.

[0035] Exemplarily, the water temperature threshold can be 5 and the air temperature threshold can be 10. When the change in water temperature is 20°C and the change in air temperature is 30°C, it is determined that the change in water temperature is greater than the water temperature threshold and the change in air temperature is greater than the air temperature threshold, then it is determined that the heat conversion state of the heat exchange water tank is in the dry burning state.

[0036] In the embodiments of the present application, the water temperature threshold and the air temperature threshold are obtained by comparing the change in the water temperature of the heat exchange water tank and the change in the air temperature of the gaseous refrigerant output by the compressor during the experiment when there is water in the heat exchange water tank, that is, when the heat conversion state of the heat exchange water tank is the hot water heating state, and heating the heat exchange water tank; and when there is no water in the heat exchange water tank, that is, when the heat conversion state of the heat exchange water tank is the dry burning state, heating the heat exchange water tank and comparing the change in the water temperature of the heat exchange water tank and the change in the air temperature of the gaseous refrigerant output by the compressor. It can be understood that when the heat conversion state of the heat exchange water tank is the dry burning state, the high-temperature and high-pressure gaseous refrigerant heats the heat exchange water tank, and the water temperature in the heat exchange water tank changes rapidly. And when the heat exchange water tank is in the dry burning state, the refrigerant output by the compressor heats the air in the heat exchange water tank. Since the air density is less than the water density, the heat conversion is faster, resulting in the air source heat pump frequently triggering the high-pressure protection and affecting the refrigerant circulation. That is, when the heat conversion state of the heat exchange water tank is two different states, the obtained air temperature change and water temperature change are different. Therefore, the water temperature threshold and the air temperature threshold can be used to judge the heat conversion state of the heat exchange water tank.

[0037] In the embodiments of the present application, by obtaining the change in the water temperature of the heat exchange water tank, the change in the air temperature of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air source heat pump is located, the water temperature threshold and the air temperature threshold corresponding to the ambient temperature are determined. Furthermore, when the change in the water temperature is greater than or equal to the water temperature threshold and the change in the air temperature is greater than or equal to the air temperature threshold, it is determined that the heat conversion state of the heat exchange water tank is the dry burning state. When the heat conversion state of the heat exchange water tank is the dry burning state, the refrigerant output by the compressor heats the air in the heat exchange water tank. Since the air density is less than the water density, the heat conversion is faster, resulting in the air source heat pump frequently triggering the high-pressure protection and affecting the refrigerant circulation. Therefore, by combining the change in the air temperature of the refrigerant and the change in the water temperature of the heat exchange water tank, the heat conversion state of the heat exchange water tank can be accurately judged; and the heat conversion efficiency of the refrigerant during the refrigerant circulation process and the influence of the ambient temperature on the water temperature change in the water tank are fully considered. Thus, the water temperature threshold and the air temperature threshold corresponding to the ambient temperature are determined, further improving the accuracy of determining that the heat conversion of the heat exchange water tank is in the dry burning state and avoiding misjudgment.

[0038] Please refer to Figure 3 , which is a schematic flow chart of a dry burning determination method provided by the embodiments of the present application. As Figure 3 shown, the method of the embodiments of the present application may include the following steps S201-S206.

[0039] S201, when the compressor enters the working state, obtain the first water temperature at the first water level of the heat exchange water tank, the second water temperature at the second water level of the heat exchange water tank, the first air temperature of the compressor, and the ambient temperature;

[0040] In one embodiment, after receiving a start command, an air - source heat pump water heater starts components such as a compressor and an outdoor heat exchanger to enter the working state, heats the water in the heat - exchange water tank, and simultaneously obtains the first water temperature at the first water level of the heat - exchange water tank, the second water temperature at the second water level, the first air temperature of the gaseous refrigerant output by the compressor, and the ambient temperature.

[0041] Optionally, the heat - exchange water tank includes a first water level and a second water level, and the installation heights of the first water level and the second water level in the water tank are different. Please continue to refer to Figure 1 , a first water - temperature detection component 8 is installed at the first water level, and a second water - temperature detection component 9 is installed at the second water level. In the embodiments of the present application, the water temperatures in different height spaces of the heat - exchange water tank can be obtained respectively through the water - level detection components installed at the first water level and the second water level, and then the water - temperature change amounts at different times and different heights can be obtained, accurately obtaining the maximum temperature variable in the heat - exchange water tank and improving the accuracy of judging the heat - conversion state of the heat - exchange water tank. Among them, the first water - temperature detection component and the second water - temperature detection component can specifically be temperature bulbs or temperature sensors, and the specific forms thereof are not limited herein.

[0042] S202, when the working duration of the compressor in the working state reaches the duration threshold, obtain the third water temperature at the first water level of the heat - exchange water tank, the fourth water temperature at the second water level of the heat - exchange water tank, and the second air temperature of the compressor;

[0043] In one embodiment, when the compressor enters the working state, a timer is simultaneously started to calculate the working duration of the compressor from entering the working state to the current moment. When it is obtained that the working duration reaches the duration threshold, it is determined that the condition for obtaining the water temperature of the heat - exchange water tank again is satisfied. The third water temperature of the heat - exchange water tank is obtained through the first water - temperature detection component, and the fourth water temperature of the heat - exchange water tank is obtained through the second water - temperature detection component. Similarly, the second air temperature of the compressor is obtained. The specific value of the duration threshold can be set by the user independently or determined according to the refrigeration effect of the air - source heat pump water heater. In the embodiments of the present application, the duration threshold can be 10 min (minutes).

[0044] S203, determine the water - temperature change amount of the heat - exchange water tank based on the first water temperature, the second water temperature, the third water temperature, and the fourth water temperature;

[0045] In one embodiment, the first water temperature, the second water temperature, the third water temperature, and the fourth water temperature are obtained, and the water - temperature change amount of the heat - exchange water tank within the duration threshold is determined based on them.

[0046] Further, in the embodiment of the present application, the first water temperature change amount of the hot water replacement tank within the duration threshold can be obtained, that is, the difference between the first water temperature and the third water temperature is determined as the first water temperature change amount, and the second water temperature change amount of the second water level of the hot water replacement tank within the duration threshold is obtained, that is, the water temperature difference between the second water temperature and the fourth water temperature is determined as the second water temperature change amount, and then the maximum value among the first water temperature change amount and the second water temperature change amount is determined as the water temperature change amount of the hot water replacement tank.

[0047] Exemplarily, when the compressor enters the working state, the first water temperature detection component collects the first water temperature of the hot water replacement tank at the current moment as 15 °C, and the second water temperature detection component collects the second water temperature of the hot water replacement tank at the current moment as 14 °C. After 10 minutes, the first detection component collects the third water temperature of the hot water replacement tank at the current moment as 32 °C, and the second water temperature detection component collects the fourth water temperature of the hot water replacement tank at the current moment as 30 °C. Based on the water temperature difference between the first water temperature and the third water temperature, the first water temperature change amount is obtained as 17 °C, and based on the water temperature difference between the second water temperature and the fourth water temperature, the second water temperature change amount is obtained as 16 °C. Since it is determined that the second water temperature change amount is less than the first water temperature change amount, the first water temperature change amount is determined as the water temperature change amount of the hot water replacement tank, that is, the water temperature change amount in the hot water replacement tank is 17 °C.

[0048] S204. Determine the air temperature change amount based on the first air temperature and the second air temperature;

[0049] Specifically, after obtaining the first air temperature and the second air temperature output from the air outlet of the compressor, the air temperature difference between the first air temperature and the second air temperature is determined as the air temperature change amount of the air outlet.

[0050] Exemplarily, when the compressor enters the working state, the exhaust temperature detection component detects that the air temperature at the air outlet of the compressor is 16 °C. After 10 minutes, the exhaust temperature detection component detects that the air temperature at the air outlet of the compressor is 50 °C, then the air temperature change amount at the air outlet is determined as 34 °C.

[0051] S205. Determine the water temperature threshold and the air temperature threshold corresponding to the environmental temperature in the temperature threshold mapping table, and the corresponding relationship between the environmental temperature and the water temperature threshold and the air temperature threshold is recorded in the temperature threshold mapping table;

[0052] In one embodiment, after obtaining the environmental temperature, the water temperature threshold and the air temperature threshold corresponding to the currently obtained environmental temperature (ambient temperature) can be determined in the temperature threshold mapping table.

[0053] Exemplarily, the temperature threshold mapping table can be referred to as shown in Table 1, where a is the water temperature threshold and b is the air temperature threshold:

[0054]

[0055] For example, if it is determined that the ambient temperature is 20°C, the water temperature threshold can be determined to be 2°C and the air temperature threshold can be determined to be 10°C. The air temperature threshold b is an exemplary fixed temperature value in the embodiments of the present application. In other embodiments, it can vary according to the change of the ambient temperature.

[0056] S206. When the change amount of the water temperature is greater than or equal to the water temperature threshold and the change amount of the air temperature is greater than or equal to the air temperature threshold, determine that the heat conversion state of the heat exchange water tank is the dry burning state.

[0057] Specifically, please refer to the description of step S103 in the above-mentioned embodiments of the specification, which will not be elaborated here.

[0058] In the embodiments of the present application, after the compressor enters the working state, the change amount of the water temperature of the heat exchange water tank and the change amount of the air temperature at the air outlet of the compressor are determined by collecting the water temperature of the first water level and the second water level of the heat exchange water tank and the first air temperature and the second air temperature of the gaseous refrigerant output from the air outlet of the compressor at different times. The water temperature obtained is the water temperature detected at different water level heights of the heat exchange water tank, and the change amount of the water temperature at different positions of the heat exchange water tank and the change amount of the air temperature at the air outlet of the compressor at different times can be obtained, which improves the accuracy of the obtained change amount of the water temperature and the change amount of the air temperature. By determining that the water temperature difference between the first water temperature and the third water temperature is the first water temperature difference and the water temperature difference between the second water temperature and the fourth water temperature is the second water temperature change amount, the change situation of the water temperature at different water levels of the heat exchange water tank can be obtained. Furthermore, among the change situations of the water temperature at different water levels, the change amount of the water temperature with the largest change is determined as the change amount of the water temperature of the heat exchange water tank, which can accurately determine the change amount of the water temperature representing the heat exchange water tank and provide a judgment basis for accurately determining the heat exchange state of the heat exchange water tank subsequently. And in the present application, the water temperature threshold and the air temperature threshold corresponding to the ambient temperature can be directly determined through the temperature threshold mapping table. Since the water temperature threshold and the air temperature threshold are determined by the ambient temperature that affects the heat exchange efficiency of the air energy water heater, the accuracy of the water temperature threshold and the air temperature threshold is improved, and at the same time, the speed of determining the water temperature threshold and the air temperature threshold is increased.

[0059] Please refer to Figure 4 , which is a schematic flow chart of a dry burning determination method provided by the embodiments of the present application. As Figure 4 shown, the method of the embodiments of the present application may include the following steps S301-step S306.

[0060] S301. Obtain the change amount of the water temperature of the heat exchange water tank, the change amount of the air temperature of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air energy water heater is located;

[0061] S302. Determine the water temperature threshold and the air temperature threshold corresponding to the ambient temperature;

[0062] Specifically, please refer to the descriptions of steps S101 - S102 in the above - mentioned specification embodiments, which will not be elaborated here.

[0063] S303. When the water - temperature change amount is greater than or equal to the water - temperature threshold value and the air - temperature change amount is greater than or equal to the air - temperature threshold value, update the water - temperature change amount, the air - temperature change amount, the water - temperature threshold value, and the air - temperature threshold value.

[0064] In one embodiment, when it is first determined that the water - temperature change amount is greater than or equal to the water - temperature threshold value and the air - temperature change amount is greater than or equal to the air - temperature threshold value, it is determined that the water - temperature change amount, the air - temperature change amount, the water - temperature threshold value, and the air - temperature threshold value need to be updated.

[0065] Among them, the update of the water - temperature change amount can be as follows: when the working duration of the compressor entering the working state reaches the second duration threshold value, re - obtain the fifth water - temperature of the first water level of the heat - exchange water tank and the sixth water - temperature of the second water level of the heat - exchange water tank, and then determine the third water - temperature change amount based on the water - temperature difference between the fifth water - temperature and the third water - temperature, determine the fourth water - temperature change amount based on the water - temperature difference between the sixth water - temperature and the fourth water - temperature, and then update the variable with the largest value among the third water - temperature change amount and the fourth water - temperature change amount as the current water - temperature change amount of the heat - exchange water tank; the specific steps for updating the air - temperature change amount can be: when the working duration of the compressor entering the working state reaches the second duration threshold value, re - obtain the third air - temperature of the gaseous refrigerant output from the air outlet of the compressor, and then obtain the air - temperature difference between the third air - temperature and the second air - temperature, and update this air - temperature difference as the current air - temperature change amount; the update of the water - temperature threshold value and the air - temperature threshold value can specifically be to update the water - temperature threshold value and the air - temperature threshold value in the temperature - threshold mapping table according to the number of times of obtaining the water - temperature change amount and the air - temperature change amount, and the environmental temperature. In the embodiments of the present application, the temperature - threshold mapping table can be as shown in Table 2, where an is the water - temperature threshold value corresponding to obtaining the nth water - temperature change amount and air - temperature change amount at different environmental temperatures (ambient temperature), and bn is the air - temperature threshold value corresponding to obtaining the nth water - temperature change amount and air - temperature change amount.

[0066]

[0067] Specifically, after re - obtaining the water - temperature change amount of the heat - exchange water tank and the air - temperature change amount of the air outlet of the compressor, if it is determined that the number of times of obtaining the water - temperature change amount and the air - temperature change amount is 2, then determine the threshold value corresponding to the environmental temperature in a2 as the updated water - temperature threshold value, and determine the threshold value corresponding to the environmental temperature in b2 as the updated air - temperature threshold value. Exemplarily, if the environmental temperature is 20 °C, then it is determined that the water - temperature threshold value is updated to 2.5 and the air - temperature threshold value is updated to 10.

[0068] It can be understood that the second duration threshold can be set according to the number of times of obtaining the temperatures collected by the first water temperature detection component and the second water temperature detection component. Exemplarily, at the first collection, the second duration threshold can be set as follows: when the compressor enters the working state, the first water temperature detection component and the second water temperature detection component immediately collect the water temperature of the heat exchange water tank; at the second collection, the second duration threshold can be set as follows: ten minutes after the first collection is completed; at the third collection, the second duration threshold can be set as follows: fifteen minutes after the second collection is completed. Similarly, according to this second duration threshold, the air temperature variable is updated, which will not be elaborated here. By gradually adjusting the second duration threshold for collecting temperatures, the changes in the operating state of the air source heat pump water heater can be captured more comprehensively, and thus the energy conversion state of the heat exchanger can be accurately determined.

[0069] S304, obtain the update count;

[0070] In one embodiment, after updating the water temperature change amount, the air temperature change amount, the water temperature threshold, and the air temperature threshold, the update count is obtained.

[0071] S305, when the update count reaches the count threshold, and the updated water temperature change amount is greater than or equal to the water temperature threshold, and the air temperature change amount is greater than or equal to the air temperature threshold, determine that the heat conversion state of the heat exchange water tank is in a dry burning state;

[0072] In one embodiment, when the update count reaches the count threshold, and the updated water temperature change amount is greater than or equal to the water temperature threshold, and the air temperature change amount is greater than or equal to the air temperature threshold, then determine that the heat conversion state of the heat exchange water tank is in a dry burning state. If the update count does not reach the count threshold, and the updated water temperature change amount is greater than or equal to the water temperature threshold, and the air temperature change amount is greater than or equal to the air temperature threshold, then perform the steps of updating the water temperature change amount, the air temperature change amount, the water temperature threshold, and the air temperature threshold until the update count reaches the count threshold. In the implementation of this application, the count threshold can be set to 2, and the count threshold can also be set according to the specific type of the air source heat pump water heater. Preferably, in the embodiment of this application, the count threshold can be set to 3. By obtaining the water temperature change amount and the air temperature change amount multiple times to determine whether the heat conversion state of the heat exchange water tank is in a dry burning state, the accuracy of determining the heat conversion state of the heat exchange water tank is improved.

[0073] S306, when the updated water temperature change amount is less than the water temperature threshold and / or the air temperature change amount is less than or equal to the air temperature threshold, clear the update count.

[0074] In one embodiment, when the updated water temperature change amount is less than the water temperature threshold and / or the air temperature change amount is less than or equal to the air temperature threshold, set the update count to 0, and re-obtain and calculate the water temperature change amount and the air temperature change amount.

[0075] In the embodiments of the present application, by obtaining the water temperature change amounts and air temperature change amounts within different working durations, the heat conversion state of the heat exchange water tank is determined to be the dry burning state. The water temperature change amounts and air temperature change amounts are obtained multiple times to avoid mistakes caused by short-term fluctuations during single judgment, thereby improving the accuracy of determining that the heat conversion state of the heat exchange water tank is the dry burning state.

[0076] Based on Figure 1 the structural schematic diagram of Figure 5 , the dry burning determination device provided by the embodiments of the present application will be introduced in detail below. It should be noted that Figure 5 the dry burning determination device in Figures 2 - 4 is used to execute the method of the embodiments of the present application. For the sake of convenience of description, only the parts related to the embodiments of the present application are shown. For the specific technical details not disclosed, please refer to the embodiments shown in Figures 2 - 4 of the present application. Specifically, the dry burning determination device 10 includes:

[0077] An acquisition unit 11, configured to acquire the water temperature change amount of the heat exchange water tank, the air temperature change amount of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air energy water heater is located;

[0078] A first determination unit 12, configured to determine the water temperature threshold and the air temperature threshold corresponding to the ambient temperature;

[0079] A second determination unit 13, configured to determine that the heat conversion state of the heat exchange water tank is the dry burning state when the water temperature change amount is greater than or equal to the water temperature threshold and the air temperature change amount is greater than or equal to the air temperature threshold.

[0080] Optionally, the acquisition unit 11 includes:

[0081] A first acquisition subunit 111, configured to acquire the first water temperature of the first water level of the heat exchange water tank, the second water temperature of the second water level of the heat exchange water tank, the first air temperature of the compressor, and the ambient temperature when the compressor enters the working state;

[0082] A second acquisition subunit 112, configured to acquire the third water temperature of the first water level of the heat exchange water tank, the fourth water temperature of the second water level of the heat exchange water tank, and the second air temperature of the compressor when the working duration of the compressor entering the working state reaches the duration threshold;

[0083] A first determination subunit 113, configured to determine the water temperature change amount of the heat exchange water tank based on the first water temperature, the second water temperature, the third water temperature, and the fourth water temperature;

[0084] A second determination subunit 114, configured to determine the air temperature change amount based on the first air temperature and the second air temperature. The first water level and the second water level are at different heights in the heat exchange water tank.

[0085] Optionally, the first determination subunit 113 is specifically configured to:

[0086] Determine that the temperature difference between the first water temperature and the third water temperature is the first water temperature change amount;

[0087] Determine that the temperature difference between the second water temperature and the fourth water temperature is the second water temperature change amount;

[0088] Determine the water temperature change amount of the heat exchange water tank based on the first water temperature change amount and the second water temperature change amount.

[0089] Optionally, the first determination subunit 113 is specifically configured to:

[0090] When the first water temperature change amount is greater than or equal to the second water temperature change amount, determine that the first water temperature change amount is the water temperature change amount of the heat exchange water tank;

[0091] When the first water temperature change amount is less than the second water temperature change amount, determine that the second water temperature change amount is the water temperature change amount of the heat exchange water tank.

[0092] Optionally, the second determination subunit 114 is specifically configured to:

[0093] Determine that the temperature difference between the first air temperature and the second air temperature is the air temperature change amount.

[0094] Optionally, the first determination unit 12 includes:

[0095] A threshold determination unit 121, configured to determine a water temperature threshold and an air temperature threshold corresponding to the ambient temperature in a temperature threshold mapping table, where the temperature threshold mapping table records the correspondence between the ambient temperature and the water temperature threshold and the air temperature threshold.

[0096] Optionally, the second determination unit 13 includes:

[0097] An update subunit 131, configured to update the water temperature change amount, the air temperature change amount, the water temperature threshold, and the air temperature threshold when the water temperature change amount is greater than or equal to the water temperature threshold and the air temperature change amount is greater than or equal to the air temperature threshold;

[0098] A times acquisition subunit 132, configured to acquire the update times;

[0099] A dry burning subunit 133, configured to determine that the heat conversion state of the heat exchange water tank is a dry burning state when the update times reach the times threshold, and the updated water temperature change amount is greater than or equal to the water temperature threshold and the air temperature change amount is greater than or equal to the air temperature threshold.

[0100] Optionally, the second determination unit 13 further includes:

[0101] A clearing subunit 134, configured to clear the update times when the updated water temperature change amount is less than the water temperature threshold and / or the air temperature change amount is less than the air temperature threshold.

[0102] In the embodiment of the present application, by obtaining the water temperature change of the heat exchange water tank, the temperature change of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air energy water heater is located, the water temperature threshold and the temperature threshold corresponding to the ambient temperature are determined. Furthermore, when the water temperature change is greater than or equal to the water temperature threshold and the temperature change is greater than or equal to the temperature threshold, it is determined that the heat conversion state of the heat exchange water tank is the dry burning state. When the heat conversion state of the compressor is the dry burning state, the refrigerant output by the compressor heats the air in the heat exchange water tank. Since the air density is less than the water density, the heat conversion is faster, resulting in the air energy water heater frequently triggering the high-pressure protection, affecting the refrigerant circulation. Therefore, by combining the temperature change of the refrigerant and the water temperature change of the heat exchange water tank, the heat conversion state of the heat exchange water tank can be accurately judged; and the heat conversion efficiency of the refrigerant during the refrigerant circulation process and the influence of the ambient temperature on the water temperature change in the water tank are fully considered. Thus, the water temperature threshold and the temperature threshold corresponding to the ambient temperature are determined, further improving the accuracy of determining that the heat conversion of the heat exchange water tank is in the dry burning state and avoiding misjudgment.

[0103] Please refer to Figure 6 , which is a schematic structural diagram of an air energy water heater provided by an embodiment of the present application. As Figure 6 shown, the air energy water heater 500 includes a processor 501 and a memory 502. Among them, the processor 501 is electrically connected to the memory 502.

[0104] The processor 501 is the control center of the air source heat pump water heater 500 and may include one or more processing cores. The processor 501 connects various parts of the entire air source heat pump water heater 500 through various interfaces and lines. By running or calling the computer programs stored in the memory 502 and calling the data stored in the memory 502, it executes various functions of the air source heat pump water heater 500 and processes data, thereby performing overall management and control of the air source heat pump water heater 500. Optionally, the processor 501 may be implemented in at least one hardware form of digital signal processing (DSP), field programmable gate array (FPGA), or programmable logic array (PLA). The processor 501 may integrate one or a combination of several of a CPU, a graphics processing unit (GPU), and a modem. Among them, the CPU mainly processes the operating system, user interfaces, and application programs, etc.; the GPU is responsible for rendering and drawing the displayed content; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 501 and may be implemented separately through a communication chip.

[0105] The memory 502 can be used to store software programs and modules. The processor 501 executes various functional applications and data processing by running the computer programs and modules stored in the memory 502. The memory 502 mainly includes a program storage area and a data storage area. Among them, the program storage area can store the operating system, computer programs required for at least one function, etc.; the data storage area can store data created according to the use of the air source heat pump water heater 500.

[0106] In addition, the memory 502 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices. Correspondingly, the memory 502 may also include a memory controller to provide the processor 501 with access to the memory 502.

[0107] In this embodiment, the processor 501 in the air source heat pump water heater 500 loads the instructions corresponding to the processes of one or more computer programs into the memory 502 according to the following steps, and the processor 501 runs the computer programs stored in the memory 502 to implement various functions as follows:

[0108] Obtain the water temperature change of the heat exchange water tank, the air temperature change of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air source heat pump water heater is located;

[0109] Determine the water temperature threshold and air temperature threshold corresponding to the ambient temperature;

[0110] When the change in water temperature is greater than or equal to the water temperature threshold and the change in air temperature is greater than or equal to the air temperature threshold, determine that the heat conversion state of the heat exchange water tank is the dry burning state.

[0111] Optionally, when the processor 501 executes to obtain the change in water temperature of the heat exchange water tank, the change in air temperature of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air energy water heater is located, it specifically executes:

[0112] When the compressor enters the working state, obtain the first water temperature of the first water level of the heat exchange water tank, the second water temperature of the second water level of the heat exchange water tank, the first air temperature of the compressor, and the ambient temperature;

[0113] When the working duration of the compressor entering the working state reaches the duration threshold, obtain the third water temperature of the first water level of the heat exchange water tank, the fourth water temperature of the second water level of the heat exchange water tank, and the second air temperature of the compressor;

[0114] Determine the change in water temperature of the heat exchange water tank based on the first water temperature, the second water temperature, the third water temperature, and the fourth water temperature;

[0115] Determine the change in air temperature based on the first air temperature and the second air temperature. The heights of the first water level and the second water level in the heat exchange water tank are different.

[0116] Optionally, when the processor 501 executes to determine the change in water temperature of the heat exchange water tank based on the first water temperature, the second water temperature, the third water temperature, and the fourth water temperature, it specifically executes:

[0117] Determine that the difference between the first water temperature and the third water temperature is the first change in water temperature;

[0118] Determine that the difference between the second water temperature and the fourth water temperature is the second change in water temperature;

[0119] Determine the change in water temperature of the heat exchange water tank based on the first change in water temperature and the second change in water temperature.

[0120] Optionally, when the processor 501 executes to determine the change in water temperature of the heat exchange water tank based on the first change in water temperature and the second change in water temperature, it specifically executes:

[0121] When the first change in water temperature is greater than or equal to the second change in water temperature, determine that the first change in water temperature is the change in water temperature of the heat exchange water tank;

[0122] When the first change in water temperature is less than the second change in water temperature, determine that the second change in water temperature is the change in water temperature of the heat exchange water tank.

[0123] Optionally, when the processor 501 determines the temperature change amount based on the first temperature and the second temperature, it specifically performs:

[0124] Determine the temperature difference between the first temperature and the second temperature as the temperature change amount.

[0125] Optionally, when the processor 501 determines the water temperature threshold and the air temperature threshold corresponding to the ambient temperature, it specifically performs:

[0126] Determine the water temperature threshold and the air temperature threshold corresponding to the ambient temperature in the temperature threshold mapping table, where the temperature threshold mapping table records the correspondence between the ambient temperature and the water temperature threshold and the air temperature threshold.

[0127] Optionally, when the processor 501 determines that the heat conversion state of the heat exchange water tank is in a dry burning state when the water temperature change amount is greater than or equal to the water temperature threshold and the air temperature change amount is greater than or equal to the air temperature threshold, it specifically performs:

[0128] When the water temperature change amount is greater than or equal to the water temperature threshold and the air temperature change amount is greater than or equal to the air temperature threshold, update the water temperature change amount, the air temperature change amount, the water temperature threshold, and the air temperature threshold;

[0129] Obtain the update count;

[0130] When the update count reaches the count threshold, and the updated water temperature change amount is greater than or equal to the water temperature threshold and the air temperature change amount is greater than or equal to the air temperature threshold, determine that the heat conversion state of the heat exchange water tank is in a dry burning state.

[0131] Optionally, after the processor 501 updates the water temperature change amount, the air temperature change amount, the water temperature threshold, and the air temperature threshold, it also performs:

[0132] When the updated water temperature change amount is less than the water temperature threshold and / or the air temperature change amount is less than the air temperature threshold, clear the update count.

[0133] In an embodiment of the present application, by obtaining the temperature change amount of the heat exchange water tank, the temperature change amount of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air energy water heater is located, a water temperature threshold and an air temperature threshold corresponding to the ambient temperature are determined. Furthermore, when the temperature change amount of the water is greater than or equal to the water temperature threshold and the temperature change amount of the air is greater than or equal to the air temperature threshold, it is determined that the heat conversion state of the heat exchange water tank is the dry burning state. In the case where the heat conversion state of the heat exchange water tank is the dry burning state, the refrigerant output by the compressor heats the air in the heat exchange water tank. Since the density of air is less than the density of water, the heat conversion is relatively fast, resulting in the frequent triggering of the high-pressure protection of the air energy water heater and affecting the circulation of the refrigerant. Therefore, by combining the temperature change amount of the refrigerant and the temperature change amount of the heat exchange water tank, the heat conversion state of the heat exchange water tank can be accurately judged; and the heat conversion efficiency of the refrigerant during the refrigerant circulation process and the influence of the ambient temperature on the water temperature change in the water tank are fully considered. Thus, the water temperature threshold and the air temperature threshold corresponding to the ambient temperature are determined, further improving the accuracy of determining that the heat conversion of the heat exchange water tank is in the dry burning state and avoiding misjudgment.

[0134] It should be understood that the device provided in the embodiment of the present application is used to execute the above-mentioned dry burning determination method, so the same effects as the above-mentioned implementation method can be achieved.

[0135] In the case of adopting an integrated unit, the device may include a processing module and a storage module. Among them, when the device is applied to an air energy water heater, the processing module can be used to control and manage the actions of the air energy water heater. The storage module can be used to support the air energy water heater to execute relevant program codes and the like.

[0136] Among them, the processing module can be a processor or a controller, which can implement or execute various exemplary logical blocks, modules, and circuits described in combination with the disclosure of the present application. The processor can also be a combination that realizes computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module can be a memory.

[0137] In addition, the device provided in the embodiment of the present application can specifically be a chip, a component, or a module. The chip may include a connected processor and a memory; wherein, the memory is used to store instructions, and when the processor calls and executes the instructions, the chip can execute the dry burning determination method provided in the above-mentioned embodiment.

[0138] The embodiment of the present application also provides a computer-readable storage medium, in which computer program code is stored. When the computer program code runs on a computer, the computer is enabled to execute the above-mentioned related method steps to implement the dry burning determination method provided in the above-mentioned embodiment.

[0139] This embodiment also provides a computer program product. When the computer program product runs on a computer, it causes the computer to execute the above-related steps to implement a dry-burning determination method provided by the above embodiment.

[0140] Among them, the device, computer-readable storage medium, computer program product, or chip provided in this embodiment are all used to execute the corresponding method provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method provided above, and will not be elaborated here.

[0141] Through the description of the above embodiments, those skilled in the art can understand that for the convenience and conciseness of description, only the above division of each functional module is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0142] In the embodiments provided in this application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0143] The above content is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application, and all should be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A method for determining dry burning, characterized in that: Applied to an air-energy water heater, the air-energy water heater comprises a heat exchange tank and a compressor, and the gaseous refrigerant output by the compressor is heat-converted in the heat exchange tank; the method comprises: Obtaining the water temperature change of the water exchange water tank, the air temperature change of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air-energy water heater is located; Determining a water temperature threshold and an air temperature threshold corresponding to the ambient temperature; When the water temperature change is greater than or equal to the water temperature threshold, and the air temperature change is greater than or equal to the air temperature threshold, it is determined that the heat conversion state of the water exchange water tank is a dry-burning state.

2. The method according to claim 1, characterized in that The step of obtaining the water temperature change of the water exchange water tank, the air temperature change of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air energy water heater is located includes: When the compressor enters a working state, obtaining a first water temperature of a first water level of the water exchange water tank, a second water temperature of a second water level of the water exchange water tank, a first air temperature of the compressor, and the ambient temperature; When the working time of the compressor entering the working state reaches a time threshold, obtaining a third water temperature of the first water level of the hot water exchange tank, a fourth water temperature of the second water level of the hot water exchange tank, and a second air temperature of the compressor; determining a water temperature change of the heat exchange water tank based on the first water temperature, the second water temperature, the third water temperature, and the fourth water temperature; The air temperature change is determined based on the first air temperature and the second air temperature, and the first water level and the second water level are different in height in the heat exchange water tank.

3. The method according to claim 2, characterized in that The determining the water temperature change of the heat exchange water tank based on the first water temperature, the second water temperature, the third water temperature and the fourth water temperature includes: Determine that the water temperature difference between the first water temperature and the third water temperature is a first water temperature variation; Determine that the water temperature difference between the second water temperature and the fourth water temperature is a second water temperature variation; The water temperature change amount of the heat exchange water tank is determined based on the first water temperature change amount and the second water temperature change amount.

4. The method according to claim 3, characterized in that The determining the water temperature change of the heat exchange water tank based on the first water temperature change and the second water temperature change includes: When the first water temperature change is greater than or equal to the second water temperature change, determining the first water temperature change as the water temperature change of the heat exchange water tank; When the first water temperature change is less than the second water temperature change, the second water temperature change is determined to be the water temperature change of the heat exchange water tank.

5. The method according to claim 2, characterized in that: The determining the temperature change amount based on the first temperature and the second temperature includes: A temperature difference between the first temperature and the second temperature is determined as the temperature change.

6. The method according to claim 1, characterized in that The determining of a water temperature threshold and an air temperature threshold corresponding to the ambient temperature includes: The water temperature threshold and the air temperature threshold corresponding to the ambient temperature are determined in a temperature threshold mapping table, wherein the temperature threshold mapping table records the corresponding relationship between the ambient temperature and the water temperature threshold and the air temperature threshold.

7. The method according to claim 1, characterized in that When the water temperature change is greater than or equal to the water temperature threshold, and the air temperature change is greater than or equal to the air temperature threshold, determining that the heat conversion state of the water exchange water tank is a dry-burning state includes: When the water temperature change is greater than or equal to the water temperature threshold, and the air temperature change is greater than or equal to the air temperature threshold, updating the water temperature change, the air temperature change, the water temperature threshold, and the air temperature threshold; Get the number of updates; When the update number reaches the number threshold, and the updated water temperature change is greater than or equal to the water temperature threshold, and the air temperature change is greater than or equal to the air temperature threshold, it is determined that the heat conversion state of the water exchange water tank is a dry burning state.

8. The method according to claim 7, characterized in that After the updating of the water temperature change, the air temperature change, the water temperature threshold and the air temperature threshold, the further step includes: When the updated water temperature change is less than the water temperature threshold and / or the air temperature change is less than the air temperature threshold, the update times are cleared.

9. A dry burning determination device, characterized in that: Applied to an air-energy water heater, the air-energy water heater comprises a heat exchange tank and a compressor, and the refrigerant output by the compressor is heat-converted in the heat exchange tank; the device comprises: An acquisition unit, used to acquire the water temperature change of the water exchange water tank, the air temperature change of the gaseous refrigerant output by the compressor, and the ambient temperature of the space where the air-energy water heater is located; A first determining unit, used to determine a water temperature threshold and an air temperature threshold corresponding to the ambient temperature; The second determination unit is used to determine that the heat conversion state of the water exchange water tank is a dry-burning state when the water temperature change is greater than or equal to the water temperature threshold and the air temperature change is greater than or equal to the air temperature threshold.

10. An air energy water heater, characterized in that: The air energy water heater comprises: A memory for storing executable program codes; A processor is used to call and run the executable program code from the memory, so that the air-to-water heater executes the method according to any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program code, and when the computer program code is executed, the method according to any one of claims 1 to 8 is implemented.

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