Methods and devices for determining the refrigerant quantity of air-conditioning water heaters and air-conditioning water heaters

Abstract

This invention provides a method, apparatus, and air-conditioning water heater for determining the refrigerant quantity. The method involves acquiring the outlet water temperature and the pressure saturation temperature. Based on the pressure saturation temperature and the outlet water temperature, a first temperature difference is determined. Based on the relationship between the first temperature difference and a first preset threshold, and a pre-acquired correspondence between the difference and the result to be used, the refrigerant quantity is determined. This method allows for obtaining the refrigerant quantity result without relying on after-sales technical personnel, thus improving the efficiency of determining the refrigerant quantity compared to methods that rely on after-sales technical personnel.

Description

Technical Field

[0001] This invention relates to the field of air conditioning water heater technology, and in particular to a method, apparatus and air conditioning water heater for determining the refrigerant quantity. Background Technology

[0002] Air conditioning water heaters absorb low-temperature heat energy from the air, which is then compressed by a compressor and converted into high-temperature heat energy to heat the water. Air conditioning water heaters are highly efficient and energy-saving. Compared to electric water heaters, they save on resource costs when producing the same amount of hot water, and they are even more energy-efficient than electric auxiliary heating solar water heaters. Air conditioning water heaters represent the primary technological approach for this technology.

[0003] For air conditioning water heaters, too much or too little refrigerant can easily lead to problems such as reduced unit lifespan, decreased performance, or even malfunction. Appropriate refrigerant charge is fundamental to the reliable and efficient operation of the air conditioning system. Currently, the refrigerant charge is determined by after-sales technicians based on experience, which suffers from low efficiency. Summary of the Invention

[0004] This invention provides a method, apparatus, and air conditioner water heater for determining the refrigerant quantity, thereby addressing the shortcomings of low efficiency in determining the refrigerant quantity in the prior art and improving the efficiency of determining the refrigerant quantity.

[0005] This invention provides a method for determining the refrigerant quantity in an air-conditioning water heater, the method comprising:

[0006] Obtain the outlet water temperature and the pressure saturation temperature;

[0007] Based on the pressure saturation temperature and the outlet water temperature, a first temperature difference is determined;

[0008] Based on the relationship between the first temperature difference and the first preset threshold, as well as the pre-acquired correspondence between the difference and the result to be used, the refrigerant quantity result is determined.

[0009] According to a method for determining the refrigerant quantity in an air-conditioning water heater provided by the present invention, the step of determining the refrigerant quantity result based on the relationship between the first temperature difference and a first preset threshold, and the pre-acquired correspondence between the difference and the result to be used, includes:

[0010] When the first temperature difference is greater than the first preset threshold, based on the first temperature difference and the pre-acquired correspondence between the difference and the result to be used, the first refrigerant quantity result is determined as the refrigerant quantity result, wherein the first refrigerant quantity result is a result indicating that the refrigerant quantity is higher than the rated refrigerant quantity.

[0011] If the first temperature difference is not greater than the first preset threshold, the exhaust temperature is obtained; based on the second temperature difference between the exhaust temperature and the pressure saturation temperature, and the pre-obtained correspondence between the difference and the result to be used, the refrigerant quantity result is determined.

[0012] According to a method for determining the refrigerant quantity of an air-conditioning water heater provided by the present invention, the step of determining the refrigerant quantity result based on a second temperature difference between the exhaust temperature and the pressure saturation temperature, and a pre-acquired correspondence between the difference and the result to be used, includes:

[0013] When the second temperature difference is greater than the second preset threshold, based on the second temperature difference and the pre-acquired correspondence between the difference and the result to be used, the second refrigerant quantity result is determined as the refrigerant quantity result, wherein the second refrigerant quantity result is a result indicating that the refrigerant quantity is lower than the rated refrigerant quantity;

[0014] If the second temperature difference is not greater than the second preset threshold, based on the second temperature difference and the pre-acquired correspondence between the difference and the result to be used, the third refrigerant quantity result is determined as the refrigerant quantity result, wherein the third refrigerant quantity result is a result indicating that the refrigerant quantity is equal to the rated refrigerant quantity.

[0015] According to the present invention, a method for determining the refrigerant quantity of an air-conditioning water heater, after the step of determining the refrigerant quantity result based on the relationship between the first temperature difference and a first preset threshold, and the pre-acquired correspondence between the difference and the result to be used, the method further includes:

[0016] Based on the refrigerant quantity results and the pre-set correspondence between the results and conversion methods, the conversion method to be used is determined;

[0017] Based on the pre-obtained rated refrigerant quantity and the conversion method to be used, the refrigerant quantity corresponding to the refrigerant quantity result is determined.

[0018] According to a method for determining the refrigerant quantity of an air-conditioning water heater provided by the present invention, prior to the steps of obtaining the outlet water temperature and pressure saturation temperature, the method further includes:

[0019] Get the information to be used;

[0020] The outlet water temperature is adjusted based on the information to be used, and the adjusted outlet water temperature is obtained.

[0021] The step of obtaining the outlet water temperature includes:

[0022] Obtain the adjusted outlet water temperature.

[0023] According to the present invention, a method for determining the refrigerant quantity of an air-conditioning water heater, prior to the step of determining the refrigerant quantity result based on the relationship between the first temperature difference and a first preset threshold, and the pre-acquired correspondence between the difference and the result to be used, the method further includes:

[0024] Based on the adjusted outlet water temperature and the pre-set temperature and relationship correspondence, the correspondence to be used is determined.

[0025] According to a method for determining the refrigerant quantity in an air-conditioning water heater provided by the present invention, the step of obtaining the pressure saturation temperature includes:

[0026] Obtain the detection pressure at the preset detection points;

[0027] The pressure saturation temperature is determined based on the detected pressure and the pre-set pressure-temperature conversion relationship.

[0028] The present invention also provides a device for determining the refrigerant quantity of an air conditioner water heater, the device comprising:

[0029] The acquisition module is used to acquire the outlet water temperature and the pressure saturation temperature;

[0030] The first determining module is used to determine a first temperature difference based on the pressure saturation temperature and the outlet water temperature;

[0031] The second determining module is used to determine the refrigerant quantity result based on the relationship between the first temperature difference and the first preset threshold, as well as the pre-acquired correspondence between the difference and the result to be used.

[0032] The present invention also provides an air conditioner water heater, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of the refrigerant quantity determination method of any of the above-described air conditioner water heaters.

[0033] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the refrigerant quantity determination method for any of the above-described air conditioner water heaters.

[0034] The present invention provides a method, apparatus, and air-conditioning water heater for determining refrigerant quantity. By acquiring the outlet water temperature and the pressure saturation temperature, a first temperature difference is determined based on the pressure saturation temperature and the outlet water temperature. The refrigerant quantity is then determined based on the relationship between the first temperature difference and a first preset threshold, as well as a pre-acquired correspondence between the difference and the result to be used. This method allows for obtaining the refrigerant quantity result without relying on after-sales technical personnel, thus improving the efficiency of refrigerant quantity determination compared to methods that rely on after-sales technical personnel. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is one of the flowcharts illustrating the method for determining the refrigerant quantity in an air-conditioning water heater provided by the present invention;

[0037] Figure 2 This is the second flowchart illustrating the method for determining the refrigerant quantity in an air-conditioning water heater provided by the present invention.

[0038] Figure 3 This is a schematic diagram of the refrigerant quantity determination device for an air conditioner water heater provided by the present invention;

[0039] Figure 4 This is one of the structural schematic diagrams of the air conditioner water heater provided by the present invention;

[0040] Figure 5 This is the second structural schematic diagram of the air conditioner water heater provided by the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0042] To improve the efficiency of determining refrigerant quantity, this invention provides a method, apparatus, and air-conditioning water heater for determining refrigerant quantity. The following describes the method in conjunction with... Figure 1 This invention provides a method for determining the refrigerant quantity in an air-conditioning water heater.

[0043] like Figure 1 As shown in the figure, an embodiment of the present invention provides a method for determining the refrigerant quantity of an air conditioner water heater, the method comprising:

[0044] S101, obtain the outlet water temperature and the pressure saturation temperature.

[0045] To improve the efficiency of determining the refrigerant quantity, the outlet water temperature and pressure saturation temperature can be obtained. The outlet water temperature is the hot water temperature corresponding to the outlet of the air conditioner water heater, and the pressure saturation temperature is the saturation temperature corresponding to the high pressure at the compressor discharge port.

[0046] In one embodiment, when the air conditioner water heater is in heating mode, the user-set outlet water temperature can be obtained. The pressure saturation temperature corresponding to the compressor discharge port can also be obtained and used as the high-pressure saturation temperature.

[0047] In another implementation, when the air conditioner water heater is heating, since the user-set outlet water temperature may not change, the outlet water temperature can be obtained only once. In the case where it is necessary to execute the refrigerant quantity determination method for the air conditioner water heater provided in this embodiment of the invention, the high-pressure saturation temperature can be obtained in real time.

[0048] S102, determine the first temperature difference based on the pressure saturation temperature and the outlet water temperature.

[0049] After obtaining the outlet water temperature and the pressure saturation temperature, a first temperature difference can be determined based on these two values. As one implementation method, the difference between the pressure saturation temperature and the outlet water temperature can be used as the first temperature difference.

[0050] S103 determines the refrigerant quantity result based on the relationship between the first temperature difference and the first preset threshold, as well as the pre-acquired correspondence between the difference and the result to be used.

[0051] After obtaining the first temperature difference, the refrigerant quantity can be determined based on the relationship between the first temperature difference and the first preset threshold, as well as the correspondence between the pre-obtained difference and the result to be used.

[0052] The first preset threshold is a preset threshold determined based on the outlet water temperature, and the correspondence to be used is a correspondence determined based on the outlet water temperature. There is a correspondence between the first preset threshold and the correspondence to be used.

[0053] In one implementation, the outlet water temperature can be adjusted based on the obtained information to be used, and the adjusted outlet water temperature can be obtained. In this case, the first preset threshold is a preset threshold determined based on the adjusted outlet water temperature, and the correspondence to be used is a correspondence determined based on the adjusted outlet water temperature.

[0054] Therefore, the refrigerant quantity can be determined based on the relationship between the first temperature difference and the first preset threshold, as well as the pre-obtained correspondence between the difference and the result to be used. As can be seen, in this embodiment, the outlet water temperature and pressure saturation temperature can be obtained. Based on the pressure saturation temperature and the outlet water temperature, the first temperature difference is determined. Based on the relationship between the first temperature difference and the first preset threshold, as well as the pre-obtained correspondence between the difference and the result to be used, the refrigerant quantity is determined. In this way, the refrigerant quantity can be obtained without relying on after-sales technical personnel, which improves the efficiency of determining the refrigerant quantity compared to relying on after-sales technical personnel.

[0055] As one embodiment of the present invention, the step of determining the refrigerant quantity result based on the relationship between the first temperature difference and the first preset threshold, and the pre-acquired correspondence between the difference and the result to be used, may include:

[0056] If the first temperature difference is greater than the first preset threshold, based on the first temperature difference and the pre-acquired correspondence between the difference and the result to be used, the first refrigerant quantity result is determined as the refrigerant quantity result. The first refrigerant quantity result indicates that the refrigerant quantity is higher than the rated refrigerant quantity.

[0057] In other words, if the first temperature difference exceeds the first preset threshold, it indicates that the pressure saturation temperature is too high. In this case, the refrigerant quantity can be determined to be higher than the rated refrigerant quantity, i.e., too much refrigerant. The rated refrigerant quantity is determined based on the model of the air conditioner / water heater.

[0058] If the first temperature difference is not greater than the first preset threshold, the exhaust temperature is obtained; based on the second temperature difference between the exhaust temperature and the pressure saturation temperature, and the pre-obtained correspondence between the difference and the result to be used, the refrigerant quantity result is determined. Wherein, the exhaust temperature is the exhaust temperature corresponding to the compressor exhaust port.

[0059] The step of determining the refrigerant quantity based on the second temperature difference between the exhaust temperature and the pressure saturation temperature, and the pre-acquired correspondence between the difference and the result to be used, may include:

[0060] If the second temperature difference is greater than the second preset threshold, the second refrigerant quantity result is determined as the refrigerant quantity result based on the second temperature difference and the pre-acquired correspondence between the difference and the result to be used.

[0061] The second refrigerant quantity result indicates that the refrigerant quantity is lower than the rated refrigerant quantity, and the second preset threshold is greater than the first preset threshold. The second temperature difference can be the difference between the exhaust temperature and the pressure saturation temperature.

[0062] If the second temperature difference is not greater than the second preset threshold, based on the second temperature difference and the pre-acquired correspondence between the difference and the result to be used, the third refrigerant quantity result is determined as the refrigerant quantity result, wherein the third refrigerant quantity result is a result indicating that the refrigerant quantity is equal to the rated refrigerant quantity.

[0063] In other words, if the second temperature difference is greater than the second preset threshold, the refrigerant quantity can be determined to be lower than the rated refrigerant quantity, i.e., insufficient refrigerant. If the second temperature difference is not greater than the second preset threshold, the refrigerant quantity can be determined to be equal to the rated refrigerant quantity, i.e., normal refrigerant quantity.

[0064] As can be seen, in this embodiment, the refrigerant quantity can be determined in different ways based on the relationship between the first temperature difference and the first preset threshold. This allows the refrigerant quantity to be determined without relying on after-sales technicians, which improves the efficiency of determining the refrigerant quantity compared to the method of determining the refrigerant quantity through after-sales technicians.

[0065] As one embodiment of the present invention, after the step of determining the refrigerant quantity result based on the relationship between the first temperature difference and the first preset threshold, and the pre-acquired correspondence between the difference and the result to be used, the above method may further include:

[0066] Based on the refrigerant quantity results and the pre-set correspondence between results and conversion methods, the conversion method to be used is determined. Based on the pre-obtained rated refrigerant quantity and the conversion method to be used, the refrigerant quantity corresponding to the refrigerant quantity result is determined.

[0067] After obtaining the refrigerant quantity results, the conversion method to be used can be determined based on the refrigerant quantity results and the pre-set correspondence between results and conversion methods. The pre-set correspondence between results and conversion methods includes: the correspondence between the first refrigerant quantity result and the first conversion method, the correspondence between the second refrigerant quantity result and the second conversion method, and the correspondence between the third refrigerant quantity result and the third conversion method.

[0068] Accordingly, if the refrigerant quantity result is the first refrigerant quantity result, the conversion method to be used is the first conversion method. If the refrigerant quantity result is the second refrigerant quantity result, the conversion method to be used is the second conversion method. If the refrigerant quantity result is the third refrigerant quantity result, the conversion method to be used is the third conversion method.

[0069] When the conversion method to be used is the first conversion method, the pre-obtained rated refrigerant quantity can be multiplied by the first preset value to obtain the first refrigerant quantity. When the conversion method to be used is the second conversion method, the rated refrigerant quantity can be multiplied by the second preset value to obtain the second refrigerant quantity.

[0070] When the conversion method to be used is the third conversion method, the rated refrigerant quantity is used as the third refrigerant quantity. For air conditioners and water heaters with the same rated refrigerant quantity, the first refrigerant quantity is higher than the third refrigerant quantity, and the third refrigerant quantity is higher than the second refrigerant quantity.

[0071] The first preset value is higher than the second preset value. Both the first and second preset values ​​can be determined based on the characteristics of the air conditioner / water heater itself, and are not specified in detail here. For example, if the refrigerant quantity is higher than the rated refrigerant quantity (excessive refrigerant quantity), the refrigerant quantity may be 20% higher than the rated refrigerant quantity. Correspondingly, the first preset value can be any value not less than 120%.

[0072] When the refrigerant level is lower than the rated refrigerant level (low refrigerant level), the refrigerant level is 20% lower than the rated refrigerant level. Accordingly, the second preset value can be any value not exceeding 80%.

[0073] As can be seen, in this embodiment, the refrigerant quantity corresponding to the refrigerant quantity result can be accurately determined according to the conversion method to be used and the rated refrigerant quantity. Compared with the method of after-sales technicians determining the refrigerant quantity result, the accuracy of determining the refrigerant quantity can be improved.

[0074] To better understand the method for determining the refrigerant quantity of an air conditioner water heater provided in this embodiment of the invention, the following is a combination of... Figure 2 The present invention provides an example of a method for determining the refrigerant quantity of an air-conditioning water heater.

[0075] For example, such as Figure 2 As shown, the method for determining the refrigerant quantity of an air conditioner water heater provided in this embodiment of the invention may include the following steps:

[0076] When the air conditioner water heater is operating in heating mode, step S201 can be executed.

[0077] S201, obtain the outlet water temperature and pressure saturation temperature.

[0078] S202, the difference between the pressure saturation temperature and the outlet water temperature is used as the first temperature difference value.

[0079] Assume the first preset threshold is 5℃ and the second preset threshold is 25℃.

[0080] S203, if the first temperature difference is greater than 5°C, based on the first temperature difference and the pre-acquired correspondence between the difference and the result to be used, determine the first refrigerant quantity result as the refrigerant quantity result.

[0081] If the initial temperature difference exceeds 5°C, the high-pressure saturation temperature is too high, resulting in an excessive amount of refrigerant. Following step S203, step S204 can be executed. Assume the first preset value is 120%.

[0082] S204, if the refrigerant quantity result is the first refrigerant quantity result, multiply the pre-obtained rated refrigerant quantity by the first preset multiplier by 120% to obtain the first refrigerant quantity.

[0083] S205, if the first temperature difference is not greater than 5°C, obtain the exhaust temperature, and use the difference between the exhaust temperature and the pressure saturation temperature as the second temperature difference.

[0084] S206, when the second temperature difference is greater than 25°C, based on the second temperature difference and the pre-acquired correspondence between the difference and the result to be used, the second refrigerant quantity result is determined as the refrigerant quantity result.

[0085] S207, if the refrigerant quantity result is the second refrigerant quantity result, multiply the pre-obtained rated refrigerant quantity by the first preset multiplier by 80% to obtain the second refrigerant quantity.

[0086] S208, if the second temperature difference is not greater than 25°C, based on the second temperature difference and the pre-acquired correspondence between the difference and the result to be used, the third refrigerant quantity result is determined as the refrigerant quantity result.

[0087] S209, if the refrigerant quantity result is the third refrigerant quantity result, the pre-obtained rated refrigerant quantity shall be used as the third refrigerant quantity.

[0088] As one embodiment of the present invention, before the steps of obtaining the outlet water temperature and pressure saturation temperature, the method may further include:

[0089] Obtain the information to be used; adjust the outlet water temperature based on the information to obtain the adjusted outlet water temperature.

[0090] To further improve the user experience, the water temperature can be adjusted. To adjust the water temperature, pending usage information can be obtained, which can be at least one of the following: user information, weather information, and time information.

[0091] After obtaining the information to be used, the outlet water temperature can be adjusted based on the information to obtain the adjusted outlet water temperature. Accordingly, the above-mentioned step of obtaining the outlet water temperature may include: obtaining the adjusted outlet water temperature.

[0092] In one implementation, the temperature to be adjusted can be determined based on the information to be used and the correspondence between the pre-set information and the temperature adjustment, and then the outlet water temperature can be adjusted to the temperature to be adjusted, thus obtaining the adjusted outlet water temperature.

[0093] There are several ways to determine the temperature to be adjusted:

[0094] The first method of determination involves using user information, which can include user identity information. This user identity information can be obtained using data collected by infrared sensors, image acquisition devices, and audio acquisition devices. When the information to be used is user information, the frequency of its occurrence can be determined first.

[0095] If the frequency of the same user information appearing exceeds a preset frequency threshold, or if the number of consecutive days the same user information appears exceeds a preset number of days threshold, the temperature to be adjusted can be determined based on the user's identity information and the pre-set correspondence between information and temperature adjustment. The outlet water temperature is then adjusted to the desired temperature, thus obtaining the adjusted outlet water temperature.

[0096] The pre-set information and temperature adjustment correspondence can include the temperature adjustment habits of different users. By using the above method, the water temperature can be adjusted to a temperature that better suits the usage habits of different users, which can further improve the user experience.

[0097] The weather information to be used can be real-time weather data or a forecast for tomorrow. Alternatively, if the weather information is real-time, the temperature to be adjusted can be determined from a pre-set correspondence between the real-time weather data and the adjusted temperature. The outlet water temperature is then adjusted to the desired temperature, thus obtaining the adjusted outlet water temperature.

[0098] The pre-set information and temperature adjustment correspondence can include comfortable temperatures for different weather conditions. By using the above method, the water temperature can be adjusted to better suit different weather conditions, which can further improve the user experience.

[0099] The third method involves determining the desired temperature when the information to be used is the forecast for tomorrow's weather. Based on this forecast, the temperature to be adjusted can be determined from a pre-set correspondence between information and temperature settings. Then, if the user is detected resting and the time meets a preset time condition, the water temperature can be adjusted to the desired temperature. This preset time condition can be a condition where the time exceeds a certain point in time. For example, the preset time condition could be a time exceeding 9 PM.

[0100] This method allows users to adjust the water temperature even when they don't need hot water, enabling them to quickly experience a comfortable water temperature that suits different weather conditions and improving the user experience.

[0101] The fourth method involves using the current time as the time to be used. In this case, the temperature to be adjusted can be determined from the pre-set correspondence between the current time and the adjusted temperature. The outlet water temperature is then adjusted to the desired temperature, thus obtaining the adjusted outlet water temperature.

[0102] The pre-set information and temperature adjustment correspondence can include the temperature adjustment corresponding to different time periods set by the user. In this way, fine control of the water outlet temperature can be achieved, further improving the user experience.

[0103] The fifth method involves determining the user's usage habits in different weather conditions based on their identity information. Then, based on the weather information, corresponding usage habits are identified. Finally, the desired temperature is determined from a pre-set relationship between pre-set information and temperature settings. The outlet water temperature is then adjusted to the desired temperature, thus obtaining the adjusted outlet water temperature.

[0104] In this way, it is possible to determine the temperature adjustment that meets the habits of different users in different weather conditions, thereby adjusting the water temperature to a level that better suits the usage habits of different users in different weather conditions, which can further improve the user experience.

[0105] The sixth method, when the information to be used includes user information and time information, can determine the user's habit information at different time periods based on the user's identity information. Then, based on the time information, it can determine the corresponding usage habit information. Finally, based on the usage habit information, it can determine the temperature to be adjusted from a pre-set correspondence between information and temperature adjustment. The outlet water temperature is then adjusted to the desired temperature, thus obtaining the adjusted outlet water temperature.

[0106] In this way, it is possible to determine the appropriate temperature setting to suit the habits of different users at different times, thereby adjusting the water temperature to better match their usage habits and improving the user experience.

[0107] The seventh method, when the information to be used includes both weather and time information, involves determining the correspondence between the information to be used and the temperature to be adjusted based on the weather information. Then, based on the time information, the temperature to be adjusted is determined from this correspondence. The outlet water temperature is then adjusted to the desired temperature, thus obtaining the adjusted outlet water temperature. This method can address sudden situations such as large temperature differences between day and night or sudden temperature changes, adjusting the outlet water temperature to a more comfortable level for the user at different times of the day.

[0108] The eighth determination method is to use at least one of the determination methods described above, from the first to the eighth determination method, when the information to be used includes the user information to be used, the weather information to be used, and the time information to be used.

[0109] In one implementation, when multiple temperatures to be adjusted are determined, a subsequent temperature to be adjusted can be determined based on a pre-set weight of each determination method. In another implementation, a subsequent temperature to be adjusted can be randomly selected from the multiple temperatures to be adjusted.

[0110] As can be seen, in this embodiment, different methods can be used to adjust the water temperature, thereby further improving the user experience.

[0111] As one embodiment of the present invention, before the step of determining the refrigerant quantity described above, the method may further include:

[0112] Based on the adjusted outlet water temperature and the pre-set temperature and relationship correspondence, the correspondence to be used is determined.

[0113] Once the adjusted outlet water temperature is obtained, the corresponding relationship to be used can be determined based on the adjusted outlet water temperature and the pre-set correspondence between temperature and relationship. The relationship to be used is the correspondence between the difference and the result.

[0114] The first preset threshold is different for different pending correspondences. The value range of the first preset threshold is 0℃-10℃. For example, there can be 10 different pending correspondences for different first preset thresholds.

[0115] Different first preset thresholds correspond to different second preset thresholds, with the second preset threshold ranging from 25℃ to 60℃. For example, if the first preset threshold is 2℃, the second preset threshold can be 35℃; if the first preset threshold is 7℃, the second preset threshold can be 55℃. In this case, the first and second preset thresholds can have a linear relationship.

[0116] Different first preset thresholds can correspond to the same second preset threshold, with the second preset threshold ranging from 25℃ to 60℃. In this case, the relationship between the first and second preset thresholds can be non-linear.

[0117] As one implementation method, the user's preferred outlet water temperature or the factory-set conventional outlet water temperature of the air conditioner water heater can be used as the outlet water temperature threshold. If the adjusted outlet water temperature is equal to the outlet water temperature threshold, the corresponding relationship to be used is the first preset threshold of 5℃ and the second preset threshold of 25℃.

[0118] When the adjusted outlet water temperature is higher than the outlet water temperature threshold, the various temperature values ​​that are higher than the outlet water temperature threshold can be divided into intervals according to the same or different differences. The larger the difference between the outlet water temperature threshold and the temperature value, the smaller the first preset threshold corresponding to the relationship to be used.

[0119] Correspondingly, each temperature value less than the outlet water temperature threshold can be divided into intervals according to the same or different differences. The larger the difference from the outlet water temperature threshold, the larger the first preset threshold corresponding to the relationship to be used.

[0120] As can be seen, in this embodiment, the corresponding relationship to be used can be determined for different adjusted outlet water temperatures, so that the refrigerant quantity can be determined more accurately and the efficiency of determining the refrigerant quantity can be improved.

[0121] As one embodiment of the present invention, the step of obtaining the pressure saturation temperature described above may include:

[0122] Obtain the detection pressure at the preset detection point. Based on the detection pressure and the preset pressure-temperature conversion relationship, determine the pressure saturation temperature.

[0123] To obtain the pressure saturation temperature, the detection pressure at a preset detection point can be obtained. The preset detection point can be the compressor exhaust port or the point on the water-fluorine heat exchanger where the refrigerant temperature corresponds to the high-pressure saturation temperature.

[0124] When using the point where the refrigerant temperature on the water-fluorine heat exchanger corresponds to the high-pressure saturation temperature as the preset detection point, there is a certain delay. Furthermore, due to inaccurate data under certain operating conditions, manual correction of the collected detection pressure is required.

[0125] Using the compressor exhaust port as the preset detection point allows for faster and more accurate acquisition of the detection pressure compared to using the point on the water-fluorine heat exchanger where the refrigerant temperature corresponds to the high-pressure saturation temperature, while also saving manpower.

[0126] After obtaining the detection pressure, the pressure saturation temperature can be determined based on the detection pressure and the pre-set pressure-temperature conversion relationship. The pre-set pressure-temperature conversion relationship is based on the refrigerant characteristics and is not affected by the structure of the air conditioner water heater.

[0127] As can be seen, in this embodiment, the pressure saturation temperature can be determined by acquiring the detection pressure, so that the refrigerant quantity can be determined more accurately and the efficiency of determining the refrigerant quantity can be improved.

[0128] As one embodiment of the present invention, after obtaining the refrigerant quantity result, the refrigerant quantity result can be displayed on the display screen of the air conditioner water heater or the display screen of other devices connected to the air conditioner water heater. After obtaining the refrigerant quantity, the refrigerant quantity can also be displayed accordingly so that users or after-sales personnel can clearly understand the refrigerant quantity result and / or refrigerant quantity.

[0129] As one embodiment of the present invention, if the second temperature difference is higher than the first preset temperature difference, it indicates that the refrigerant quantity is too low. In this case, the air conditioner water heater can be shut down and an alarm can be issued.

[0130] If the second temperature difference is higher than the second preset temperature difference, it indicates that the refrigerant level is low. In this case, an alarm can be issued so that the user or after-sales personnel can respond and handle the situation. The first preset temperature difference is higher than the second preset temperature difference.

[0131] The refrigerant quantity determination device for an air conditioner water heater provided by the present invention is described below. The refrigerant quantity determination device for an air conditioner water heater described below can be referred to in correspondence with the refrigerant quantity determination method for an air conditioner water heater described above.

[0132] like Figure 3As shown, this embodiment of the invention provides a refrigerant quantity determination device for an air conditioner water heater, the device comprising:

[0133] The acquisition module 310 is used to acquire the outlet water temperature and the pressure saturation temperature;

[0134] The first determining module 320 is used to determine a first temperature difference based on the pressure saturation temperature and the outlet water temperature;

[0135] The second determining module 330 is used to determine the refrigerant quantity result based on the relationship between the first temperature difference and the first preset threshold, as well as the pre-acquired correspondence between the difference and the result to be used.

[0136] As one embodiment of the present invention, the second determining module 330 may include:

[0137] The first determining unit is configured to determine the first refrigerant quantity result as the refrigerant quantity result based on the first temperature difference and the pre-acquired correspondence between the difference and the result when the first temperature difference is greater than the first preset threshold, wherein the first refrigerant quantity result is a result indicating that the refrigerant quantity is higher than the rated refrigerant quantity.

[0138] The second determining unit is used to obtain the exhaust temperature when the first temperature difference is not greater than the first preset threshold; and to determine the refrigerant quantity result based on the second temperature difference between the exhaust temperature and the pressure saturation temperature, as well as the pre-obtained correspondence between the difference and the result to be used.

[0139] As one embodiment of the present invention, the second determining unit includes:

[0140] The first determining subunit is used to determine the second refrigerant quantity result as the refrigerant quantity result based on the second temperature difference and the pre-acquired correspondence between the difference and the result when the second temperature difference is greater than the second preset threshold, wherein the second refrigerant quantity result is a result indicating that the refrigerant quantity is lower than the rated refrigerant quantity.

[0141] The second determining subunit is used to determine the third refrigerant quantity result as the refrigerant quantity result based on the second temperature difference and the pre-acquired correspondence between the difference and the result, when the second temperature difference is not greater than the second preset threshold. The third refrigerant quantity result is a result that indicates that the refrigerant quantity is equal to the rated refrigerant quantity.

[0142] As one embodiment of the present invention, the above-mentioned apparatus may further include:

[0143] The third determining module is used to determine the refrigerant quantity result after determining the refrigerant quantity result based on the relationship between the first temperature difference and the first preset threshold, as well as the pre-acquired correspondence between the difference and the result to be used, and then determine the conversion method to be used based on the refrigerant quantity result and the pre-set correspondence between the result and the conversion method.

[0144] The fourth determining module is used to determine the refrigerant quantity corresponding to the refrigerant quantity result based on the pre-acquired rated refrigerant quantity and the conversion method to be used.

[0145] As one embodiment of the present invention, the above-mentioned apparatus may further include:

[0146] The information acquisition module is used to acquire information to be used before acquiring the outlet water temperature and pressure saturation temperature.

[0147] The adjustment module is used to adjust the outlet water temperature based on the information to be used, so as to obtain the adjusted outlet water temperature.

[0148] The aforementioned acquisition module 310 is specifically used to acquire the adjusted outlet water temperature.

[0149] As one embodiment of the present invention, the above-mentioned apparatus may further include:

[0150] The fifth determining module is used to determine the correspondence to be used based on the adjusted outlet water temperature and the correspondence between the preset temperature and the relationship before determining the refrigerant quantity result based on the relationship between the first temperature difference and the first preset threshold, and the correspondence between the pre-acquired difference and the result.

[0151] As one embodiment of the present invention, the acquisition module 310 is further specifically used to acquire the detection pressure of a preset detection point; and to determine the pressure saturation temperature based on the detection pressure and a preset pressure-temperature conversion relationship.

[0152] The following describes the air conditioner water heater provided in the embodiments of the present invention. The air conditioner water heater described below and the method for determining the refrigerant quantity of the air conditioner water heater described above can be referred to each other.

[0153] like Figure 4 As shown, this embodiment of the invention provides an air-conditioning water heater, which includes a compressor 1, a four-way valve 2, a water-refrigerant heat exchanger 3, an electronic expansion valve 4, a condenser 5, and a fan 6. The outlet water temperature is represented by Two, the inlet water temperature by Twi, the exhaust water temperature by Tdi, and the exhaust water pressure by Pd.

[0154] Water-fluoride heat exchangers can be plate heat exchangers or shell-and-tube heat exchangers, and can also be replaced with other types of heat exchangers depending on actual usage requirements. Air conditioning water heaters may also include display devices, such as fault indicator lights, digital displays, buzzers, etc.

[0155] like Figure 4 As shown, when the air conditioner water heater is in heating mode, the refrigerant flows from compressor 1 through four-way valve 2 and then through water-refrigerant heat exchanger 3. Water-refrigerant heat exchanger 3 heats the water entering from the inlet, raising the inlet water temperature from the inlet temperature to the outlet temperature. Then, after passing through the throttling and pressure reduction effect of electronic expansion valve 4, it enters condenser 5. The evaporated refrigerant flows back to compressor 1 through four-way valve 2, thus completing a full heating cycle.

[0156] Figure 5 An example is a schematic diagram of the physical structure of an air conditioner water heater, such as... Figure 5 As shown, the air conditioner water heater may include: a processor 510, a communication interface 520, a memory 530, and a communication bus 540. The processor 510, communication interface 520, and memory 530 communicate with each other via the communication bus 540. The processor 510 can call logical instructions in the memory 530 to execute a method for determining the refrigerant quantity of the air conditioner water heater. This method includes: acquiring the outlet water temperature and the pressure saturation temperature; determining a first temperature difference based on the pressure saturation temperature and the outlet water temperature; and determining the refrigerant quantity result based on the relationship between the first temperature difference and a first preset threshold, as well as a pre-acquired correspondence between the difference and the result to be used.

[0157] Furthermore, the logical instructions in the aforementioned memory 530 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0158] On the other hand, the present invention also provides a computer program product, the computer program product including a computer program, the computer program being stored on a non-transitory computer-readable storage medium, the computer program being executed by a processor, the computer being able to execute the refrigerant quantity determination method for air conditioner water heaters provided by the above methods, the method including: obtaining the outlet water temperature and obtaining the pressure saturation temperature, determining a first temperature difference based on the pressure saturation temperature and the outlet water temperature, and determining the refrigerant quantity result based on the relationship between the first temperature difference and a first preset threshold, and the pre-obtained correspondence between the difference and the result to be used.

[0159] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When executed by a processor, the computer program implements a method for determining the refrigerant quantity of an air conditioner water heater provided by the above methods. The method includes: acquiring an outlet water temperature and acquiring a pressure saturation temperature; determining a first temperature difference based on the pressure saturation temperature and the outlet water temperature; and determining the refrigerant quantity result based on the relationship between the first temperature difference and a first preset threshold, as well as a pre-acquired correspondence between the difference and the result to be used.

[0160] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0161] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0162] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining the refrigerant quantity in an air-conditioning water heater, characterized in that, The method includes: Obtain the outlet water temperature and the pressure saturation temperature, wherein the pressure saturation temperature is the saturation temperature corresponding to the high pressure at the compressor exhaust port; Based on the pressure saturation temperature and the outlet water temperature, a first temperature difference is determined; Based on the relationship between the first temperature difference and the first preset threshold, as well as the pre-acquired correspondence between the difference and the result to be used, the refrigerant quantity result is determined; The step of determining the refrigerant quantity based on the relationship between the first temperature difference and the first preset threshold, and the pre-acquired correspondence between the difference and the result to be used, includes: When the first temperature difference is greater than the first preset threshold, based on the first temperature difference and the pre-acquired correspondence between the difference and the result to be used, the first refrigerant quantity result is determined as the refrigerant quantity result, wherein the first refrigerant quantity result is a result indicating that the refrigerant quantity is higher than the rated refrigerant quantity. If the first temperature difference is not greater than the first preset threshold, the exhaust temperature is obtained; based on the second temperature difference between the exhaust temperature and the pressure saturation temperature, and the pre-obtained correspondence between the difference and the result to be used, the refrigerant quantity result is determined; The step of determining the refrigerant quantity result based on the second temperature difference between the exhaust temperature and the pressure saturation temperature, and the pre-acquired correspondence between the difference and the result to be used, includes: When the second temperature difference is greater than the second preset threshold, based on the second temperature difference and the pre-acquired correspondence between the difference and the result to be used, the second refrigerant quantity result is determined as the refrigerant quantity result, wherein the second refrigerant quantity result is a result indicating that the refrigerant quantity is lower than the rated refrigerant quantity; If the second temperature difference is not greater than the second preset threshold, based on the second temperature difference and the pre-acquired correspondence between the difference and the result to be used, the third refrigerant quantity result is determined as the refrigerant quantity result, wherein the third refrigerant quantity result is a result indicating that the refrigerant quantity is equal to the rated refrigerant quantity.

2. The method for determining the refrigerant quantity of an air-conditioning water heater according to claim 1, characterized in that, After the step of determining the refrigerant quantity result based on the relationship between the first temperature difference and the first preset threshold, and the pre-acquired correspondence between the difference and the result to be used, the method further includes: Based on the refrigerant quantity results and the pre-set correspondence between the results and conversion methods, the conversion method to be used is determined; Based on the pre-obtained rated refrigerant quantity and the conversion method to be used, the refrigerant quantity corresponding to the refrigerant quantity result is determined.

3. The method for determining the refrigerant quantity of an air-conditioning water heater according to claim 1, characterized in that, Prior to the steps of obtaining the outlet water temperature and pressure saturation temperature, the method further includes: Get the information to be used; The outlet water temperature is adjusted based on the information to be used, and the adjusted outlet water temperature is obtained. The step of obtaining the outlet water temperature includes: Obtain the adjusted outlet water temperature.

4. The method for determining the refrigerant quantity of an air-conditioning water heater according to claim 3, characterized in that, Before the step of determining the refrigerant quantity result based on the relationship between the first temperature difference and the first preset threshold, and the pre-acquired correspondence between the difference and the result to be used, the method further includes: Based on the adjusted outlet water temperature and the pre-set temperature and relationship correspondence, the correspondence to be used is determined.

5. The method for determining the refrigerant quantity of an air-conditioning water heater according to any one of claims 1-4, characterized in that, The step of obtaining the pressure saturation temperature includes: Obtain the detection pressure at the preset detection points; The pressure saturation temperature is determined based on the detected pressure and the pre-set pressure-temperature conversion relationship.

6. A device for determining the refrigerant quantity of an air conditioner water heater, characterized in that, The device includes: The acquisition module is used to acquire the outlet water temperature and the pressure saturation temperature, wherein the pressure saturation temperature is the saturation temperature corresponding to the high pressure at the compressor exhaust port. The first determining module is used to determine a first temperature difference based on the pressure saturation temperature and the outlet water temperature; The second determining module is used to determine the refrigerant quantity result based on the relationship between the first temperature difference and the first preset threshold, as well as the pre-acquired correspondence between the difference and the result to be used. The step of determining the refrigerant quantity based on the relationship between the first temperature difference and the first preset threshold, and the pre-acquired correspondence between the difference and the result to be used, includes: When the first temperature difference is greater than the first preset threshold, based on the first temperature difference and the pre-acquired correspondence between the difference and the result to be used, the first refrigerant quantity result is determined as the refrigerant quantity result, wherein the first refrigerant quantity result is a result indicating that the refrigerant quantity is higher than the rated refrigerant quantity. If the first temperature difference is not greater than the first preset threshold, the exhaust temperature is obtained; based on the second temperature difference between the exhaust temperature and the pressure saturation temperature, and the pre-obtained correspondence between the difference and the result to be used, the refrigerant quantity result is determined; The step of determining the refrigerant quantity result based on the second temperature difference between the exhaust temperature and the pressure saturation temperature, and the pre-acquired correspondence between the difference and the result to be used, includes: When the second temperature difference is greater than the second preset threshold, based on the second temperature difference and the pre-acquired correspondence between the difference and the result to be used, the second refrigerant quantity result is determined as the refrigerant quantity result, wherein the second refrigerant quantity result is a result indicating that the refrigerant quantity is lower than the rated refrigerant quantity; If the second temperature difference is not greater than the second preset threshold, based on the second temperature difference and the pre-acquired correspondence between the difference and the result to be used, the third refrigerant quantity result is determined as the refrigerant quantity result, wherein the third refrigerant quantity result is a result indicating that the refrigerant quantity is equal to the rated refrigerant quantity.

7. An air-conditioning water heater, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method for determining the refrigerant quantity of an air conditioner water heater as described in any one of claims 1 to 5.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for determining the refrigerant quantity of the air conditioner water heater as described in any one of claims 1 to 5.

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