A high-temperature prevention control method for heating of an air conditioner and the air conditioner

Abstract

The application provides a high-temperature prevention control method for heating of an air conditioner and the air conditioner, and belongs to the technical field of air conditioners. In the control method, the temperature difference between the indoor environment temperature and the target temperature is obtained, and whether the outlet air temperature exceeds the safe temperature range is determined, and the high-temperature prevention adjustment strategy of the air conditioner is determined according to the comparison results. This method no longer simply relies on a single temperature threshold, but through a dynamic adjustment mechanism based on multiple real-time data, the rationality and effectiveness of the adjustment strategy are ensured, and the decline of the heating capacity caused by the limitation of the heating capacity is avoided, so that the air conditioner can heat efficiently while maintaining the safety of operation and the comfort of users.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and more specifically, to an air conditioner heating and high temperature prevention control method and an air conditioner. Background Technology

[0002] When the air conditioner is in heating mode, the indoor air is heated by the indoor heat exchanger, and then the heated air is sent to the room by the indoor fan.

[0003] To achieve rapid heating, a method is usually adopted to increase the heat exchange temperature difference to achieve high heating capacity. Specifically, by increasing the compressor frequency and increasing the compressor's work, the temperature of the refrigerant circulating to the indoor heat exchanger is raised (causing the indoor heat exchanger temperature to rise), thereby increasing the temperature difference between the indoor heat exchanger and the indoor air for heat exchange and achieving high heating capacity.

[0004] However, simply increasing the compressor frequency can lead to "overheating": Increasing the compressor frequency speeds up refrigerant circulation, raising the high-pressure side pressure of the air conditioning system. Excessively high system pressure can affect system reliability. Simultaneously, the indoor heat exchanger temperature rises, causing the air conditioner's outlet air temperature to increase. Overheated air blowing on people can cause discomfort and even pose a risk of burns. To prevent this "overheating" problem,

[0005] The common practice in existing air conditioners is to directly reduce the compressor's operating frequency when the indoor heat exchanger temperature reaches a certain preset value, thereby lowering the indoor heat exchanger temperature and the outlet air temperature. This high-temperature control method sacrifices heating capacity by limiting the indoor heat exchanger temperature, resulting in reduced heating efficiency, slower indoor temperature rise, and discomfort. Summary of the Invention

[0006] This application provides an air conditioner heating high-temperature prevention control method and an air conditioner. The control method acquires two key comparison results (the temperature difference between the indoor ambient temperature and the target temperature, and whether the outlet air temperature exceeds the safe temperature range), and determines the air conditioner's high-temperature prevention adjustment strategy based on these comparison results. This method no longer simply relies on a single temperature threshold, but uses a dynamic adjustment mechanism based on multiple real-time data to ensure the rationality and effectiveness of the adjustment strategy. This avoids a decrease in heating capacity due to limiting heating capacity, allowing the air conditioner to maintain operational safety and user comfort while providing efficient heating. Specifically:

[0007] The first aspect of this application provides a method for preventing high temperatures during heating in an air conditioner. Under heating conditions, the method includes:

[0008] When the triggering conditions for high temperature protection are met, the first comparison result between the indoor ambient temperature and the target temperature is obtained, and the second comparison result between the outlet air temperature and the preset high temperature threshold is obtained.

[0009] The high-temperature protection adjustment strategy for the air conditioner is determined based on the first comparison result and the second comparison result.

[0010] The first comparison result characterizes the temperature difference between the target temperature and the indoor ambient temperature, while the second comparison result characterizes whether the outlet air temperature exceeds the safe temperature range.

[0011] In the above technical solution, the high-temperature protection adjustment strategy includes:

[0012] The first adjustment strategy is to directly adjust the air conditioner's operating parameters, and the second adjustment strategy is to further obtain environmental state parameters and / or air conditioner system parameters before adjusting the air conditioner's operating parameters. The environmental state parameters include at least the rate of increase of indoor ambient temperature, the air conditioner system parameters include at least the pressure value on the high-pressure side of the air conditioning system, and the air conditioner operating parameters include at least the speed of the indoor fan, the air guide angle of the air guide plate, and the operating frequency of the compressor.

[0013] When the temperature difference between the target temperature and the indoor ambient temperature represented by the first comparison result is less than the preset temperature difference value, the temperature difference between the target temperature and the indoor ambient temperature represented by the first comparison result is small and the first adjustment strategy is executed. When the temperature difference between the target temperature and the indoor ambient temperature represented by the first comparison result is greater than or equal to the preset temperature difference value, the temperature difference between the target temperature and the indoor ambient temperature represented by the first comparison result is large and the second adjustment strategy is executed.

[0014] or

[0015] When the temperature difference between the target temperature and the indoor ambient temperature, as indicated by the first comparison result, is less than the minimum value of the preset temperature difference range, the temperature difference between the target temperature and the indoor ambient temperature is relatively small, and the first adjustment strategy is executed. When the temperature difference between the target temperature and the indoor ambient temperature, as indicated by the first comparison result, is greater than or equal to the maximum value of the preset temperature difference range, the temperature difference between the target temperature and the indoor ambient temperature is relatively large, and the second adjustment strategy is executed.

[0016] In the above technical solution, the first adjustment strategy includes a first adjustment strategy A for adjusting the compressor frequency and a first adjustment strategy B for adjusting the internal fan speed;

[0017] The step of determining the high-temperature protection adjustment strategy for the air conditioner based on the first comparison result and the second comparison result includes:

[0018] When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is small, the first adjustment strategy A or the first adjustment strategy B is executed based on the second comparison result.

[0019] In the above technical solution, determining whether to execute the first adjustment strategy A or the first adjustment strategy B based on the second comparison result includes:

[0020] When the second comparison result indicates that the air temperature is greater than or equal to the safe temperature range, the first adjustment strategy A, which reduces the compressor operating frequency, is executed.

[0021] When the second comparison result indicates that the air temperature is below the safe temperature range, the first adjustment strategy B, which increases the speed of the internal fan, is implemented.

[0022] In the above technical solution, under the first adjustment strategy A, the degree of reduction in the compressor operating frequency is positively correlated with the magnitude of the outlet air temperature;

[0023] and / or

[0024] Under the first adjustment strategy B, the increase in the internal fan speed is positively correlated with the outlet air temperature.

[0025] In the above technical solution, the second adjustment strategy includes a second adjustment strategy A that further acquires environmental state parameters and then adjusts the air conditioner operating parameters, and a second adjustment strategy B that further acquires air conditioner system parameters and then adjusts the air conditioner operating parameters.

[0026] Based on the first comparison result and the second comparison result, the high-temperature protection adjustment strategy of the air conditioner is determined, including:

[0027] When the first comparison result indicates a large temperature difference between the target temperature and the indoor ambient temperature...

[0028] Based on the results of the second comparison, determine whether to implement the second adjustment strategy A or the second adjustment strategy B.

[0029] In the above technical solution, determining whether to implement the second adjustment strategy A or the second adjustment strategy B based on the second comparison result includes:

[0030] When the second comparison result indicates that the air temperature is below the safe temperature range, the second adjustment strategy A is executed;

[0031] When the second comparison result indicates that the air temperature is greater than or equal to the safe temperature range, the second adjustment strategy B is executed.

[0032] In the above technical solutions,

[0033] Implement the second adjustment strategy A, including:

[0034] Determine whether the indoor environment's heating rate is greater than or equal to the preset heating rate;

[0035] If the speed is not exceeded, increase the speed of the internal fan;

[0036] Conversely, maintain the current operating status of the air conditioner.

[0037] In the above technical solutions,

[0038] Implement the second adjustment strategy B, including:

[0039] Determine whether the pressure on the high-pressure side of the air conditioning system is greater than or equal to the high-pressure threshold;

[0040] If so, reduce the operating frequency of the compressor;

[0041] Conversely, adjust the air guide angle of the air guide plate.

[0042] In the above technical solution, the adjusted air guide plate angle satisfies the requirement that the air outlet direction of the air conditioner can avoid the user when it is venting air.

[0043] In the above technical solution, under the second adjustment strategy B, the degree of reduction in the compressor operating frequency is positively correlated with the degree to which the pressure on the high-pressure side of the air conditioning system exceeds the high-pressure threshold.

[0044] In the above technical solution, the control method also includes:

[0045] Under heating conditions, a third comparison result is obtained between the outlet air temperature and the preset trigger temperature threshold.

[0046] If the outlet air temperature is greater than or equal to the preset trigger temperature threshold, the triggering condition for high temperature protection control is met.

[0047] Conversely, the triggering conditions for high-temperature protection control are not met;

[0048] The preset trigger temperature threshold is lower than the preset high temperature threshold.

[0049] In the above technical solution, the high-temperature protection adjustment strategy includes: high-temperature protection adjustment logic and high-temperature protection adjustment methods;

[0050] High-temperature protection measures include at least: changing the internal fan speed, changing the compressor operating frequency, and changing the air guide angle of the air guide plate.

[0051] In the above technical solution, the high-temperature protection adjustment strategy for the air conditioner based on the first comparison result and the second comparison result includes:

[0052] When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is less than the preset temperature difference value, and the second comparison result indicates that the outlet air temperature is greater than or equal to the safe temperature range, the operating frequency of the compressor is reduced.

[0053] When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is less than the preset temperature difference value, and the second comparison result indicates that the outlet air temperature is less than the safe temperature range, the speed of the indoor fan is increased.

[0054] When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is greater than or equal to the preset temperature difference value, and the second comparison result indicates that the outlet air temperature is greater than or equal to the safe temperature range, the compressor's operating frequency is reduced. Further adjustments to the compressor's operating frequency or the air guide vane's angle are determined by combining this with the pressure on the high-pressure side of the air conditioning system.

[0055] When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is greater than or equal to the preset temperature difference value, and the second comparison result indicates that the air outlet temperature is less than the safe temperature range, the indoor fan speed is further adjusted based on the indoor ambient temperature rise rate.

[0056] In the above technical solution, further consideration is given to determining the operating frequency of the compressor or the air guide angle of the air deflector based on the pressure on the high-pressure side of the air conditioning system, including:

[0057] If the pressure on the high-pressure side of the air conditioning system is greater than or equal to the high-pressure threshold, the operating frequency of the compressor should be reduced.

[0058] Conversely, adjust the air guide angle of the air guide plate.

[0059] In the above technical solution, the determination of whether to adjust the speed of the indoor fan is further based on the rate of temperature rise of the indoor environment, including:

[0060] If the indoor temperature rise rate is greater than or equal to the preset temperature rise rate, the air conditioner will maintain its current operating status.

[0061] Conversely, increase the speed of the internal fan.

[0062] The second aspect of this application provides an air conditioner that includes the control method provided in the first aspect of this application.

[0063] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0064] The control method provided in this application obtains two key comparison results (the temperature difference between the indoor ambient temperature and the target temperature, and whether the outlet air temperature exceeds the safe temperature range), and determines the high-temperature protection adjustment strategy of the air conditioner based on these comparison results. This method no longer simply relies on a single temperature threshold, but ensures the rationality and effectiveness of the adjustment strategy through a dynamic adjustment mechanism based on multiple real-time data. It avoids the decrease in heating capacity caused by limiting heating capacity, so that the air conditioner can maintain the safety of operation and the comfort of users while heating efficiently. Attached Figure Description

[0065] Figure 1 The control flow of the high-temperature control method in the embodiments of this application is as follows. Figure 1 ;

[0066] Figure 2 The control flow of the high-temperature control method in the embodiments of this application is as follows. Figure 2 . Detailed Implementation

[0067] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0068] Throughout the specification and claims, the following terms will have at least the meaning explicitly associated herein, unless the context otherwise requires. The meanings defined below are not intended to limit the terms, but are merely illustrative examples.

[0069] In the description of this invention, the phrase "in one embodiment" does not necessarily refer to the same embodiment, although it may refer to the same embodiment. Similarly, the phrase "in some embodiments," as used herein, does not necessarily refer to the same embodiment when used multiple times, although it may refer to the same embodiment. As used herein, the term "or" is an inclusive "or" operator and is equivalent to the term "and / or," unless the context clearly specifies otherwise. The term "based on" is not exclusive and allows for reliance on additional factors not described, unless the context clearly specifies otherwise. The word "exemplary" herein means "used as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior to or better than other embodiments. The scope of this invention is limited only by the scope of the appended claims, and any examples set forth in this specification are not intended to be limiting, but merely illustrate some of the many possible embodiments of the claimed invention. The various embodiments provided in this invention should not be construed as limiting the scope of protection of this invention.

[0070] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0074] like Figures 1-2 As shown, the first aspect of this application provides a method for preventing high temperatures during heating in an air conditioner. Under heating conditions, the method includes:

[0075] When the triggering conditions for high temperature protection are met, the first comparison result between the indoor ambient temperature and the target temperature is obtained, and the second comparison result between the outlet air temperature and the preset high temperature threshold is obtained.

[0076] The high-temperature protection adjustment strategy for the air conditioner is determined based on the first comparison result and the second comparison result.

[0077] The first comparison result characterizes the degree of temperature difference between the indoor ambient temperature and the target temperature, while the second comparison result characterizes whether the outlet air temperature exceeds the safe temperature range.

[0078] The control method provided in this application obtains two key comparison results (the temperature difference between the indoor ambient temperature and the target temperature, and whether the outlet air temperature exceeds the safe temperature range), and determines the high-temperature protection adjustment strategy of the air conditioner based on these comparison results. This method no longer simply relies on a single temperature threshold, but ensures the rationality and effectiveness of the adjustment strategy through a dynamic adjustment mechanism based on multiple real-time data. It avoids the decrease in heating capacity caused by limiting heating capacity, so that the air conditioner can maintain the safety of operation and the comfort of users while heating efficiently.

[0079] Furthermore, in some possible implementations,

[0080] The high-temperature protection adjustment strategy includes:

[0081] The first adjustment strategy is to directly adjust the operating parameters of the air conditioner, and the second adjustment strategy is to further obtain environmental state parameters and / or air conditioner system parameters before adjusting the operating parameters of the air conditioner. The environmental state parameters include at least the rate of increase of indoor ambient temperature, the air conditioner system parameters include at least the pressure value on the high-pressure side of the air conditioning system, and the air conditioner operating parameters include at least the speed of the indoor fan, the air guide angle of the air guide plate, and the operating frequency of the compressor.

[0082] in

[0083] When the temperature difference between the target temperature and the indoor ambient temperature represented by the first comparison result is less than the preset temperature difference value, the temperature difference between the target temperature and the indoor ambient temperature represented by the first comparison result is small and the first adjustment strategy is executed. When the temperature difference between the target temperature and the indoor ambient temperature represented by the first comparison result is greater than or equal to the preset temperature difference value, the temperature difference between the target temperature and the indoor ambient temperature represented by the first comparison result is large and the second adjustment strategy is executed.

[0084] or

[0085] When the temperature difference between the target temperature and the indoor ambient temperature, as indicated by the first comparison result, is less than the minimum value of the preset temperature difference range, the temperature difference between the target temperature and the indoor ambient temperature is relatively small, and the first adjustment strategy is executed. When the temperature difference between the target temperature and the indoor ambient temperature, as indicated by the first comparison result, is greater than or equal to the maximum value of the preset temperature difference range, the temperature difference between the target temperature and the indoor ambient temperature is relatively large, and the second adjustment strategy is executed.

[0086] The first adjustment strategy is suitable for situations with small temperature differences. In this case, the air conditioner's operating parameters (such as indoor fan speed or compressor frequency) are directly adjusted to achieve a quick response, optimize heating performance, and avoid over-adjustment. The second adjustment strategy is suitable for situations with larger temperature differences. In this case, environmental parameters (such as heating rate) and air conditioner system parameters (such as high-pressure side pressure) are further obtained before adjustments are made. This strategy allows for more precise control of the air conditioner's operation, preventing excessively high system pressure or excessively high outlet air temperature caused by large temperature differences.

[0087] The second adjustment strategy is suitable for situations with large temperature differences. In this case, further consideration is given to environmental parameters (such as the heating rate) and air conditioner system parameters (such as the high-pressure side pressure value), which can effectively avoid system failures caused by excessively high outlet air temperature or excessively high system pressure. This helps improve the reliability and stability of the air conditioning system and extend the service life of the air conditioner.

[0088] The first adjustment strategy will be introduced below:

[0089] In some possible implementations,

[0090] The first adjustment strategy includes the first adjustment strategy A, which adjusts the compressor frequency, and the first adjustment strategy B, which adjusts the internal fan speed.

[0091] The high-temperature protection adjustment strategy for the air conditioner is determined based on the first comparison result and the second comparison result, including:

[0092] When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is small, the first adjustment strategy A or the first adjustment strategy B is determined based on the second comparison result.

[0093] This application embodiment further optimizes the high-temperature control method for air conditioners by specifying concrete adjustment parameters (compressor frequency and indoor fan speed) and adjustment strategies (first adjustment strategy A and first adjustment strategy B). This method not only responds quickly to changes in temperature difference and outlet air temperature, but also optimizes heating performance, improves system reliability, and enhances user experience. Through a decision-making mechanism based on real-time data, the rationality and effectiveness of the adjustment strategies are ensured, enabling the air conditioner to maintain operational safety and user comfort while providing efficient heating.

[0094] Furthermore, in some possible implementations, determining whether to execute the first adjustment strategy A or the first adjustment strategy B based on the second comparison result includes:

[0095] When the second comparison result indicates that the air temperature is greater than or equal to the safe temperature range, the first adjustment strategy A, which reduces the compressor operating frequency, is executed.

[0096] When the second comparison result indicates that the air temperature is below the safe temperature range, the first adjustment strategy B, which increases the speed of the internal fan, is implemented.

[0097] The control method in this embodiment reduces heating capacity rapidly by lowering the compressor operating frequency (first adjustment strategy A) when the outlet air temperature is greater than or equal to the safe temperature range, thereby lowering the outlet air temperature and ensuring that the outlet air temperature remains within the safe range. This adjustment method effectively prevents excessively high outlet air temperatures, avoiding user discomfort or the risk of burns.

[0098] The control method in this embodiment increases the airflow and accelerates indoor air circulation by increasing the indoor fan speed (first adjustment strategy B) when the outlet air temperature is below the safe temperature range, thereby improving the heating effect and allowing the indoor temperature to approach the target temperature more quickly. This adjustment method optimizes the heating effect while ensuring a safe outlet air temperature.

[0099] For example, when the outlet air temperature is high, the heating capacity is reduced by lowering the compressor frequency; when the outlet air temperature is low, the air volume is increased by increasing the speed of the indoor fan, thereby accelerating the indoor heating rate.

[0100] Furthermore, in some possible implementations,

[0101] Under the first adjustment strategy A, the degree of reduction in the compressor operating frequency is positively correlated with the degree to which the outlet air temperature exceeds the safe temperature range;

[0102] and / or

[0103] Under the first adjustment strategy B, the increase in the internal fan speed is positively correlated with the degree to which the outlet air temperature exceeds the safe temperature range.

[0104] In the control method of this application embodiment, under the first adjustment strategy A, the degree of reduction in the compressor operating frequency is positively correlated with the outlet air temperature. This means that the higher the outlet air temperature, the greater the reduction in compressor frequency, thereby more effectively reducing heating capacity and ensuring that the outlet air temperature quickly returns to a safe range. This dynamic adjustment mechanism can accurately control the compressor frequency according to the actual changes in outlet air temperature, avoiding over-adjustment or under-adjustment.

[0105] Under the first adjustment strategy B, the increase in indoor fan speed is also positively correlated with the outlet air temperature. This means that the higher the outlet air temperature, the greater the increase in indoor fan speed, thereby increasing the air volume, accelerating indoor air circulation, and optimizing the heating effect. This dynamic adjustment mechanism can precisely control the indoor fan speed according to changes in the actual outlet air temperature, ensuring that the outlet air temperature is always within a safe range.

[0106] In summary, when the difference between the indoor ambient temperature and the user-set target temperature is small, there are two adjustment strategies: one is applied when the outlet air temperature exceeds the safe temperature range (adjustment strategy A), and the other is applied when the outlet air temperature does not exceed the safe temperature range (adjustment strategy B).

[0107] When T is satisfied 设定 -T 内环 <ΔT1 and T 出风 When T2 is greater than or equal to T2, the first adjustment strategy A is adopted, indicating that the current indoor ambient temperature T2 is ≥ T2. 内环 With the user-set target temperature T 设定 The difference is small, and the indoor ambient temperature T 内环 It is close to the user's target temperature T. 设定 At this time, operations to reduce heat output can be performed with minimal impact on users, while the outlet air temperature T 出风 The air outlet temperature is greater than or equal to the preset high temperature threshold T2, i.e., the air outlet temperature T. 出风 The temperature has reached a level that would cause discomfort to the user, necessitating high-temperature control. Therefore, the compressor frequency H2 is reduced. By decreasing the compressor's operating frequency, the outlet air temperature is rapidly lowered, ensuring user comfort and safety. Where H2 = β × (T) 出风 -T2+1), that is, T 出风 The higher the value, the greater the reduction in compressor frequency. However, it should be noted that the reduced compressor frequency should not fall below the lower limit of the allowable compressor operating frequency. Here, ΔT1 represents the user-set target temperature T. 设定 With indoor ambient temperature T 内环The preset difference, in °C, ranges from 0 to 6 °C, with one possible value being ΔT1 = 3 °C. H2 is the compressor frequency reduction value under the first adjustment strategy A, in Hz. β is the frequency reduction coefficient of H2, 1 ≤ β ≤ 8, with β = 4 being the preferred value.

[0108] When T is satisfied 设定 -T 内环 <ΔT1 and T 出风 When the temperature is less than T2, the first adjustment strategy B is adopted, indicating that the current indoor ambient temperature T 内环 With the user-set target temperature T 设定 The difference is small, and the indoor ambient temperature T 内环 It is close to the user's target temperature T. 设定 Meanwhile, the outlet air temperature T 出风 The air outlet temperature T is less than the preset high temperature threshold T2, meaning the air outlet temperature T is... 出风 The temperature hasn't yet reached a level that would make the user uncomfortable, but because the outlet air temperature is slightly high at this point, the outlet air temperature T is achieved by increasing the speed of the internal fan. 出风 While reducing the airflow, it can increase heat output, allowing the room to reach the user-set temperature more quickly; R2 = γ × (T_outlet air - T1 + 1), meaning that the higher the T_outlet air, the greater the increase in indoor fan speed. However, it should be noted that the increased indoor fan speed should not exceed the upper limit of the allowable indoor fan speed. Where ΔT1 is the user-set target temperature T. 设定 With indoor ambient temperature T 内环 The preset difference, in °C, ranges from 0 to 6 °C. R2 is the internal fan speed increase value, in rpm. γ is the internal fan speed increase coefficient of R2, ranging from 10 to 100, with one possible value being γ = 30. T1 is the preset trigger temperature threshold, T1 ≤ T 2， If the outlet air temperature T 出风 If the temperature exceeds the preset trigger temperature threshold T1, the triggering condition for high temperature protection control is met; otherwise, the triggering condition for high temperature protection control is not met.

[0109] The second adjustment strategy will be introduced below:

[0110] In some possible implementations, the second adjustment strategy includes a second adjustment strategy A that further acquires environmental state parameters before adjusting the air conditioner operating parameters, and a second adjustment strategy B that further acquires air conditioner system parameters before adjusting the air conditioner operating parameters.

[0111] Based on the first comparison result and the second comparison result, the high-temperature protection adjustment strategy of the air conditioner is determined, including:

[0112] When the first comparison result indicates a large temperature difference between the target temperature and the indoor ambient temperature...

[0113] Based on the results of the second comparison, determine whether to implement the second adjustment strategy A or the second adjustment strategy B.

[0114] The second adjustment strategy A in this embodiment of the application, by further acquiring environmental state parameters (such as the rate of temperature rise in the indoor environment), can gain a more comprehensive understanding of the current operating environment, thereby making more precise adjustments. For example, if the rate of temperature rise is high, it indicates that the indoor temperature is rising rapidly, and it may be necessary to adjust the operating parameters to avoid overheating.

[0115] The second adjustment strategy B in this embodiment of the application, by further obtaining air conditioner system parameters (such as the pressure value on the high-pressure side of the system), can provide a more comprehensive understanding of the current operating status of the air conditioner, thereby making more precise adjustments. For example, if the pressure on the high-pressure side of the system is too high, it may be necessary to adjust the compressor frequency to reduce the system pressure.

[0116] Based on the second comparison result (whether the outlet air temperature exceeds the safe temperature range), either the second adjustment strategy A or the second adjustment strategy B is selected. This decision-making mechanism based on real-time data ensures the rationality and effectiveness of the adjustment strategy, avoiding system instability or user discomfort caused by adjusting a single parameter.

[0117] Specifically, in some possible implementations, determining whether to execute the second adjustment strategy A or the second adjustment strategy B based on the second comparison result includes:

[0118] When the second comparison result indicates that the air temperature is below the safe temperature range, the second adjustment strategy A is executed;

[0119] When the second comparison result indicates that the air temperature is greater than or equal to the safe temperature range, the second adjustment strategy B is executed.

[0120] In this embodiment, when the outlet air temperature is below the safe temperature range, a second adjustment strategy A is executed, which involves further acquiring environmental state parameters (such as the rate of temperature rise in the indoor environment) before adjusting the air conditioner's operating parameters. This strategy can optimize the heating effect by monitoring environmental state parameters while ensuring the outlet air temperature is safe, thereby ensuring that the indoor temperature reaches the target temperature quickly and stably.

[0121] In this embodiment, when the outlet air temperature is greater than or equal to the safe temperature range, a second adjustment strategy B is executed. This involves further acquiring air conditioner system parameters (such as the pressure value on the high-pressure side of the system) before adjusting the air conditioner operating parameters (such as the air guide angle of the air deflector or the operating frequency of the compressor). This strategy can take more effective measures to reduce the outlet air temperature and ensure that the system operates within a safe range when the outlet air temperature is too high by monitoring the air conditioner system parameters.

[0122] Furthermore, in some possible implementations,

[0123] Implement the second adjustment strategy A, including:

[0124] Determine whether the indoor environment's heating rate is greater than or equal to the preset heating rate;

[0125] If the speed is not exceeded, increase the speed of the internal fan;

[0126] Conversely, maintain the current operating status of the air conditioner.

[0127] In this embodiment, by monitoring the rate of temperature rise in the indoor environment, the current trend of indoor temperature change can be understood more accurately. The rate of temperature rise is an important environmental parameter that reflects the speed at which the indoor temperature increases.

[0128] Furthermore, in some possible implementations,

[0129] Implement the second adjustment strategy B, including:

[0130] Determine whether the pressure on the high-pressure side of the air conditioning system is greater than or equal to the high-pressure threshold;

[0131] If so, reduce the operating frequency of the compressor;

[0132] Conversely, adjust the air guide angle of the air guide plate.

[0133] Preferably, the adjusted air guide plate angle satisfies the requirement that the air outlet direction of the air conditioner can avoid the user when it is venting air.

[0134] In this embodiment, by monitoring the pressure on the high-pressure side of the air conditioning system, it is possible to promptly detect whether the system pressure exceeds a safety threshold. The high-pressure side pressure is a crucial parameter for the operation of the air conditioning system; exceeding the safety threshold may lead to system malfunction or damage. If the high-pressure side pressure exceeds the high-pressure threshold, reducing the compressor's operating frequency can effectively lower the system pressure, protecting the air conditioning system from high-pressure damage and improving system reliability and stability.

[0135] Specifically, in some possible implementations, under the second adjustment strategy B, the degree of reduction in the compressor operating frequency is positively correlated with the degree to which the pressure on the high-pressure side of the air conditioning system exceeds the high-pressure threshold.

[0136] This means that the more the system's high-pressure side pressure exceeds the high-pressure threshold, the more the compressor frequency decreases. This dynamic adjustment mechanism can precisely control the compressor frequency based on actual changes in system pressure, preventing system failures or damage caused by excessively high system pressure.

[0137] In summary, when the difference between the indoor ambient temperature and the user-set target temperature is large, there are two adjustment strategies: one strategy is applied when the outlet air temperature does not exceed the safe temperature range (Second Adjustment Strategy A), and the other strategy is applied when the outlet air temperature exceeds the safe temperature range (Second Adjustment Strategy B). That is:

[0138] When T is satisfied 设定 -T 内环 ≥ΔT1 and T 出风 When T < T2, the second adjustment strategy A is adopted, indicating that the current indoor ambient temperature T 内环 With the user-set target temperature T 设定 The difference is large, indicating that the indoor ambient temperature is low and needs to be raised rapidly, while the outlet air temperature T... 出风 The air outlet temperature is less than the preset high temperature threshold T2, i.e., the air outlet temperature T 出风 The temperature has not yet reached a level that would make users uncomfortable; further testing is needed. 内环i With T inner ring (i-1) When T is satisfied 内环i -T 内环(i-1) A value ≥ψ indicates that the indoor heating rate is already relatively fast, so maintaining the current operating state is sufficient. If this condition is not met, to quickly reach the set indoor temperature, the heat output can be increased to enhance the heating effect. Here, ΔT1 represents the user-set target temperature T. 设定 With indoor ambient temperature T 内环 The preset difference, in °C, ranges from 0 to 6 °C, with one possible value being ΔT1 = 3 °C, T 内环i The current indoor ambient temperature, in °C (°C). This value is the measured value, T. 内环i-1 The indoor ambient temperature is measured in °C for the first minute. This value is also the measured value. ψ is the preset indoor ambient temperature rise rate, measured in °C / min. Its value ranges from 0 to 3 °C / min, and one possible value is ψ = 0.5 °C / min.

[0139] When T is satisfied 设定 -T 内环 ≥ΔT1 and T 出风 When T2 is greater than or equal to T2, the second adjustment strategy B is adopted, indicating that the current indoor ambient temperature T2 is ≥ T2. 内环 With the user-set target temperature T 设定 The difference is large, and the indoor ambient temperature T 内环 The temperature is too low, indicating a need for rapid heating, and the outlet air temperature T is also too low. 出风 The air outlet temperature is greater than or equal to the preset high temperature threshold T2, i.e., the air outlet temperature T. 出风The temperature has reached a level that causes discomfort to the user, requiring high-temperature control. The air conditioning system is equipped with a pressure sensor located at the compressor exhaust end, which can detect the high-pressure side pressure of the system and further monitor P. 压力 When P is satisfied 压力 When P < P1, it indicates that the current system high pressure has not reached the air conditioner's preset high-temperature and high-pressure protection threshold, and the system reliability is still guaranteed. Therefore, the air guide vane is adjusted to the "avoid people" position to prevent hot air from blowing directly on people, ensuring the air conditioner's high heat output and maintaining a rapid indoor temperature rise rate while ensuring user comfort and safety; when P < P1 is met... 压力 When P1 ≥ P1, it indicates that the current system high pressure has reached the air conditioner's preset threshold for high temperature and high pressure protection, posing a potential threat to system reliability. Therefore, the compressor frequency is reduced by H1. By reducing the compressor's operating frequency, the outlet air temperature is quickly lowered, prioritizing the assurance of air conditioner operational reliability. H1 = α × (P 压力 -P1+0.1), that is, P 压力 The higher the value, the greater the reduction in compressor frequency. However, it should be noted that the reduced compressor frequency should not fall below the minimum allowable operating frequency. Here, ΔT1 represents the user-set target temperature T. 设定 With indoor ambient temperature T 内环 The preset difference, in °C, ranges from 0 to 6 °C, with one possible value being ΔT1 = 3 °C. 压力 The system high-pressure side pressure is measured in MPa. P1 is the air conditioner high-pressure threshold in MPa, a pressure threshold to ensure the reliability of the air conditioning system. The value of P1 is related to the configuration of the air conditioning system itself and can be determined through reliability operation experiments or by referring to its compressor specifications. Its value range is 3MPa to 5MPa, and one possible value is P1 = 4.5MPa. H1 is the compressor frequency reduction value under the second adjustment strategy B in Hz. α is the frequency reduction coefficient of H1, 1≤α≤8, and the preferred α = 2.

[0140] As can be seen, by adopting different adjustment strategies (first adjustment strategy A, first adjustment strategy B, second adjustment strategy A, and second adjustment strategy B) under different circumstances, intelligent high temperature prevention can be achieved, significantly reducing the occurrence of hot air blowing into people. At the same time, the indoor temperature rise rate is maintained, thermal comfort is maintained, and user experience is improved.

[0141] Furthermore, in some possible implementations, the control method further includes:

[0142] Under heating conditions, a third comparison result is obtained between the outlet air temperature and the preset trigger temperature threshold.

[0143] If the outlet air temperature is greater than or equal to the preset trigger temperature threshold, the triggering condition for high temperature protection control is met.

[0144] Conversely, the triggering conditions for high-temperature protection control are not met;

[0145] The preset trigger temperature threshold is lower than the preset high temperature threshold.

[0146] It should be noted that the preset trigger temperature threshold T1 and the preset high temperature threshold T2 have a range of 45℃ to 65℃, where T2 > T1. One possible value is T1 = 52℃ and T2 = 58℃.

[0147] In summary, the high-temperature control method provided in this application distinguishes different environmental conditions by detecting the user-set target temperature, indoor ambient temperature, indoor unit outlet air temperature, indoor ambient temperature rise rate, and system high-pressure side pressure, confirms the current high-temperature protection status, and regulates the air conditioning system operation status by adjusting the compressor frequency and indoor fan speed, making the control more reasonable and intelligent, and solving the comfort problems caused by the decrease in heating capacity and the reduced indoor temperature rise rate brought about by conventional high-temperature control.

[0148] Furthermore, in some possible implementations, the high-temperature protection adjustment strategy includes: high-temperature protection adjustment logic and high-temperature protection adjustment means;

[0149] High-temperature protection measures include at least: changing the internal fan speed, changing the compressor operating frequency, and changing the air guide angle of the air guide plate.

[0150] Specifically, the high-temperature protection adjustment strategy for air conditioners based on the first and second comparison results includes:

[0151] When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is less than the preset temperature difference value, and the second comparison result indicates that the outlet air temperature is greater than or equal to the safe temperature range, the operating frequency of the compressor is reduced.

[0152] When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is less than the preset temperature difference value, and the second comparison result indicates that the outlet air temperature is less than the safe temperature range, the speed of the indoor fan is increased.

[0153] When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is greater than or equal to the preset temperature difference value, and the second comparison result indicates that the outlet air temperature is greater than or equal to the safe temperature range, the compressor's operating frequency is reduced. Further adjustments to the compressor's operating frequency or the air guide vane's angle are determined by combining this with the pressure on the high-pressure side of the air conditioning system.

[0154] When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is greater than or equal to the preset temperature difference value, and the second comparison result indicates that the air outlet temperature is less than the safe temperature range, the indoor fan speed is further adjusted based on the indoor ambient temperature rise rate.

[0155] More specifically, the operating frequency of the compressor or the air guide angle of the deflector plate can be adjusted by combining the pressure on the high-pressure side of the air conditioning system, including:

[0156] If the pressure on the high-pressure side of the air conditioning system is greater than or equal to the high-pressure threshold, the operating frequency of the compressor should be reduced.

[0157] Conversely, adjust the air guide angle of the air guide plate.

[0158] More specifically, the adjustment of the indoor fan speed should be determined by considering the rate of temperature increase in the indoor environment, including:

[0159] If the indoor temperature rise rate is greater than or equal to the preset temperature rise rate, the air conditioner will maintain its current operating status.

[0160] Conversely, increase the speed of the internal fan.

[0161] Furthermore, a second aspect of the present application also provides an air conditioner that includes the control method provided in the first aspect of the present application.

[0162] In the above embodiments of this application, the descriptions of each embodiment have their own emphasis. Parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. The steps illustrated in the related flowcharts can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown here. In other words, the order of steps described in the foregoing embodiments is merely an example. Reasonable adjustments to the order of steps based on the content of the embodiments of this application are also within the protection scope of the embodiments of this application.

[0163] The sequence numbers or order of description of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0164] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0165] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for controlling high temperature prevention in the heating function of an air conditioner, characterized in that, Under heating conditions, the high-temperature control method includes: When the triggering conditions for high temperature protection are met, the first comparison result between the indoor ambient temperature and the target temperature is obtained, and the second comparison result between the outlet air temperature and the preset high temperature threshold is obtained. The high-temperature protection adjustment strategy for the air conditioner is determined based on the first comparison result and the second comparison result. The high-temperature protection adjustment strategy includes: The first adjustment strategy is to directly adjust the operating parameters of the air conditioner, and the second adjustment strategy is to further obtain environmental state parameters and / or air conditioner system parameters before adjusting the operating parameters of the air conditioner. The environmental state parameters include at least the rate of increase of indoor ambient temperature, the air conditioner system parameters include at least the pressure value on the high-pressure side of the air conditioning system, and the air conditioner operating parameters include at least the speed of the indoor fan, the air guide angle of the air guide plate, and the operating frequency of the compressor. in When the temperature difference between the target temperature and the indoor ambient temperature represented by the first comparison result is less than the preset temperature difference value, the temperature difference between the target temperature and the indoor ambient temperature represented by the first comparison result is small and the first adjustment strategy is executed. When the temperature difference between the target temperature and the indoor ambient temperature represented by the first comparison result is greater than or equal to the preset temperature difference value, the temperature difference between the target temperature and the indoor ambient temperature represented by the first comparison result is large and the second adjustment strategy is executed. or When the temperature difference between the target temperature and the indoor ambient temperature, as indicated by the first comparison result, is less than the minimum value of the preset temperature difference range, the temperature difference between the target temperature and the indoor ambient temperature is relatively small, and the first adjustment strategy is executed. When the temperature difference between the target temperature and the indoor ambient temperature, as indicated by the first comparison result, is greater than or equal to the maximum value of the preset temperature difference range, the temperature difference between the target temperature and the indoor ambient temperature is relatively large, and the second adjustment strategy is executed.

2. The high-temperature control method according to claim 1, characterized in that, The first adjustment strategy includes a first adjustment strategy A that adjusts the compressor frequency and a first adjustment strategy B that adjusts the internal fan speed; The step of determining the high-temperature protection adjustment strategy for the air conditioner based on the first comparison result and the second comparison result includes: When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is small, the first adjustment strategy A or the first adjustment strategy B is executed based on the second comparison result.

3. The high-temperature control method according to claim 2, characterized in that, The step of determining whether to execute the first adjustment strategy A or the first adjustment strategy B based on the second comparison result includes: When the second comparison result indicates that the air temperature is greater than or equal to the safe temperature range, the first adjustment strategy A, which reduces the compressor operating frequency, is executed. When the second comparison result indicates that the air temperature is below the safe temperature range, the first adjustment strategy B, which increases the speed of the internal fan, is implemented.

4. The high-temperature control method according to claim 3, characterized in that, Under the first adjustment strategy A, the degree of reduction in the compressor operating frequency is positively correlated with the magnitude of the outlet air temperature; and / or Under the first adjustment strategy B, the increase in the rotational speed of the internal fan is positively correlated with the magnitude of the outlet air temperature.

5. The high-temperature control method according to claim 1, characterized in that, The second adjustment strategy includes a second adjustment strategy A that further acquires environmental state parameters before adjusting the air conditioner operating parameters, and a second adjustment strategy B that further acquires air conditioner system parameters before adjusting the air conditioner operating parameters; The step of determining the high-temperature protection adjustment strategy for the air conditioner based on the first comparison result and the second comparison result includes: When the first comparison result indicates a large temperature difference between the target temperature and the indoor ambient temperature... Based on the second comparison result, determine whether to implement the second adjustment strategy A or the second adjustment strategy B.

6. The high-temperature control method according to claim 5, characterized in that, The step of determining whether to execute the second adjustment strategy A or the second adjustment strategy B based on the second comparison result includes: When the second comparison result indicates that the air temperature is below the safe temperature range, the second adjustment strategy A is executed; When the second comparison result indicates that the air temperature is greater than or equal to the safe temperature range, the second adjustment strategy B is executed.

7. The high-temperature control method according to claim 6, characterized in that, The execution of the second adjustment strategy A includes: Determine whether the indoor environment's heating rate is greater than or equal to the preset heating rate; If the speed is not exceeded, increase the speed of the internal fan; Conversely, maintain the current operating status of the air conditioner.

8. The high-temperature control method according to claim 6, characterized in that, The execution of the second adjustment strategy B includes: Determine whether the pressure on the high-pressure side of the air conditioning system is greater than or equal to the high-pressure threshold; If so, reduce the operating frequency of the compressor; Conversely, adjust the air guide angle of the air guide plate.

9. The high-temperature control method according to claim 8, characterized in that, The adjusted air guide plate angle meets the requirement that the air outlet direction of the air conditioner can avoid the user when it is venting air.

10. The high-temperature control method according to claim 8, characterized in that, Under the second adjustment strategy B, the degree of reduction in the compressor operating frequency is positively correlated with the degree to which the pressure on the high-pressure side of the air conditioning system exceeds the high-pressure threshold.

11. The high-temperature control method according to any one of claims 1-10, characterized in that, The control method further includes: Under heating conditions, a third comparison result is obtained between the outlet air temperature and the preset trigger temperature threshold. If the outlet air temperature is greater than or equal to the preset trigger temperature threshold, the triggering condition for high temperature protection control is met. Conversely, the triggering conditions for high-temperature protection control are not met; The preset trigger temperature threshold is lower than the preset high temperature threshold.

12. The high-temperature control method according to claim 1, characterized in that, The high-temperature protection adjustment strategy includes: high-temperature protection adjustment logic and high-temperature protection adjustment methods; The high-temperature protection adjustment methods include at least: changing the internal fan speed, changing the compressor operating frequency, and changing the air guide angle of the air guide plate.

13. The high-temperature control method according to claim 12, characterized in that, The high-temperature protection adjustment strategy for the air conditioner based on the first comparison result and the second comparison result includes: When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is less than the preset temperature difference value, and the second comparison result indicates that the outlet air temperature is greater than or equal to the safe temperature range, the operating frequency of the compressor is reduced. When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is less than the preset temperature difference value, and the second comparison result indicates that the outlet air temperature is less than the safe temperature range, the speed of the indoor fan is increased. When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is greater than or equal to the preset temperature difference value, and the second comparison result indicates that the outlet air temperature is greater than or equal to the safe temperature range, the compressor's operating frequency is reduced. Further adjustments to the compressor's operating frequency or the air guide vane's angle are determined based on the pressure on the high-pressure side of the air conditioning system. When the first comparison result indicates that the temperature difference between the target temperature and the indoor ambient temperature is greater than or equal to the preset temperature difference value, and the second comparison result indicates that the outlet air temperature is less than the safe temperature range, the indoor fan speed is further determined by combining the indoor ambient temperature rise rate.

14. The high-temperature control method according to claim 13, characterized in that, The further determination of adjusting the compressor's operating frequency or the air guide vane's angle based on the pressure on the high-pressure side of the air conditioning system includes: If the pressure on the high-pressure side of the air conditioning system is greater than or equal to the high-pressure threshold, the operating frequency of the compressor should be reduced. Conversely, adjust the air guide angle of the air guide plate.

15. The high-temperature control method according to claim 13, characterized in that, The further determination of whether to adjust the speed of the indoor fan based on the rate of increase in indoor temperature includes: If the indoor temperature rise rate is greater than or equal to the preset temperature rise rate, the air conditioner will maintain its current operating status. Conversely, increase the speed of the internal fan.

16. An air conditioner, characterized in that, The control method included in any one of claims 1-15.

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