Air conditioner and control method, device and equipment thereof, and medium

Abstract

The application discloses an air conditioner and a control method, device and equipment thereof and a medium. The air conditioner comprises a refrigerant circulation loop, and a heat dissipation branch is further arranged in the refrigerant circulation loop. The heat dissipation branch is connected in parallel to the downstream of an outdoor heat exchanger. A refrigerant radiator and a first flow regulating valve are arranged in the heat dissipation branch, and the first flow regulating valve is located in the upstream of the refrigerant radiator. The method comprises the following steps: if the outdoor environment temperature meets a preset high-temperature condition and the operation mode of the air conditioner is a refrigeration mode, the dew point temperature corresponding to the outdoor environment temperature and the IPM module temperature are obtained, and the temperature difference between the dew point temperature and the IPM module temperature is determined; and the opening degree of the first flow regulating valve is adjusted according to the temperature difference and a preset temperature value. In high-temperature refrigeration, the opening degree of the first flow regulating valve is adjusted to control the temperature and flow entering the refrigerant radiator by combining the IPM module temperature and the dew point temperature, so that the high-temperature performance and reliability of the air conditioner are improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of air conditioners, and in particular to an air conditioner and a control method, device, equipment, and medium thereof. Background Art

[0002] In the field of air conditioning technology, especially for models with cooling capacities of 12 kW and above, performance stability and reliability in high-temperature environments are crucial considerations. These models often utilize refrigerant cooling modules as an effective means of dissipating heat from the motherboard. This approach aims to reduce motherboard temperatures by directly utilizing the refrigerant's heat exchange capacity, ensuring stable system operation. However, a significant concern is that during direct refrigerant cooling of the inverter air conditioner motherboard, if the refrigerant temperature is too low, condensation may form on the heat pipe surface, potentially causing a motherboard short circuit. To mitigate this risk, the conventional approach is to direct the refrigerant from the condenser into the heat pipe without passing through a throttling device. While this approach reduces the risk of condensation, it compromises some heat dissipation efficiency in extremely high temperatures, potentially leading to overheating of the motherboard module. Therefore, the system automatically limits the maximum operating frequency of the compressor, sacrificing some high-temperature performance to ensure safe operation of the entire system. Summary of the Invention

[0003] The present invention provides an air conditioner and a control method, device, equipment and medium thereof, aiming to solve the problem of poor heat dissipation effect of the mainboard of the existing air conditioner under high temperature conditions while preventing condensation on the mainboard.

[0004] In the first aspect, an embodiment of the present invention provides an air conditioner, comprising: a compressor, a reversing valve, an outdoor heat exchanger, an indoor heat exchanger, a refrigerant radiator, a first flow regulating valve and a second flow regulating valve, the compressor, the reversing valve, the outdoor heat exchanger, the second flow regulating valve, the indoor heat exchanger and the reversing valve are connected in sequence to form a refrigerant circulation loop, a heat dissipation branch is also provided in the refrigerant circulation loop, the heat dissipation branch is connected in parallel downstream of the outdoor heat exchanger, the refrigerant radiator and the first flow regulating valve are arranged in the heat dissipation branch, and the first flow regulating valve is located upstream of the refrigerant radiator.

[0005] In a second aspect, the present invention further provides a method for controlling an air conditioner, which is applied to the air conditioner of the first aspect, and the method comprises:

[0006] If the outdoor ambient temperature meets a preset high temperature condition and the operating mode of the air conditioner is a cooling mode, obtaining a dew point temperature and an IPM module temperature corresponding to the outdoor ambient temperature, and determining a temperature difference between the dew point temperature and the IPM module temperature;

[0007] The opening of the first flow regulating valve is adjusted according to the temperature difference and a preset temperature value.

[0008] In a third aspect, the present invention further provides a control device for an air conditioner, comprising a unit for executing the method of the second aspect.

[0009] In a fourth aspect, an embodiment of the present invention further provides a computer device, comprising a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the method of the second aspect when executing the computer program.

[0010] In a fifth aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein the storage medium stores a computer program, and the computer program, when executed by a processor, can implement the method of the second aspect described above.

[0011] The present invention provides an air conditioner and a control method, device, equipment, and medium thereof. The air conditioner includes: a compressor, a reversing valve, an outdoor heat exchanger, an indoor heat exchanger, a refrigerant radiator, a first flow regulating valve, and a second flow regulating valve. The compressor, reversing valve, outdoor heat exchanger, second flow regulating valve, indoor heat exchanger, and reversing valve are sequentially connected to form a refrigerant circulation loop. The refrigerant circulation loop also includes a heat dissipation branch connected in parallel downstream of the outdoor heat exchanger. The refrigerant radiator and the first flow regulating valve are disposed in the heat dissipation branch, with the first flow regulating valve being located upstream of the refrigerant radiator. The method includes: if the outdoor ambient temperature meets a preset high temperature condition and the air conditioner is in cooling mode, obtaining a dew point temperature corresponding to the outdoor ambient temperature and an IPM module temperature, and determining a temperature difference between the dew point temperature and the IPM module temperature; and adjusting the opening of the first flow regulating valve based on the temperature difference and a preset temperature value. During high-temperature cooling, the present application makes a judgment by combining the IPM module temperature and the dew point temperature, and adjusts the opening of the first flow regulating valve to control the temperature and flow entering the refrigerant radiator, thereby improving the heat dissipation capacity of the mainboard and the maximum operating frequency of the compressor under high-temperature conditions, thereby improving the high-temperature performance and reliability of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 Schematic diagram of a refrigerant circulation circuit of an air conditioner according to an embodiment of the present invention;

[0014] Figure 2A schematic flow chart of a method for controlling an air conditioner according to an embodiment of the present invention;

[0015] Figure 3 1 is a schematic flow chart of sub-steps of a method for controlling an air conditioner according to an embodiment of the present invention;

[0016] Figure 4 1 is a schematic flow chart of sub-steps of a method for controlling an air conditioner according to an embodiment of the present invention;

[0017] Figure 5 1 is a schematic flow chart of sub-steps of a method for controlling an air conditioner according to an embodiment of the present invention;

[0018] Figure 6 1 is a schematic flow chart of sub-steps of a method for controlling an air conditioner according to an embodiment of the present invention;

[0019] Figure 7 A simplified control logic diagram of a method for controlling an air conditioner according to an embodiment of the present invention;

[0020] Figure 8 A schematic block diagram of a control device for an air conditioner provided in an embodiment of the present invention;

[0021] Figure 9 A schematic block diagram of a computer device provided in an embodiment of the present invention;

[0022] Reference numerals:

[0023] 1. Compressor; 2. Reversing valve; 3. Outdoor heat exchanger; 4. Indoor heat exchanger; 5. Refrigerant radiator; 6. First flow regulating valve; 7. Second flow regulating valve. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0026] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in the specification and appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0028] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0029] In order to facilitate understanding of the present invention, the air conditioner provided by the embodiment of the present invention is first described. Figure 1 , Figure 1 Schematic diagram of a refrigerant circulation circuit for an air conditioner according to an embodiment of the present invention. The embodiment of the present invention provides an air conditioner comprising: a compressor 1, a reversing valve 2, an outdoor heat exchanger 3, an indoor heat exchanger 4, a refrigerant radiator 5, a first flow regulating valve 6, and a second flow regulating valve 7. The compressor 1, the reversing valve 2, the outdoor heat exchanger 3, the second flow regulating valve 7, the indoor heat exchanger 4, and the reversing valve 2 are sequentially connected to form a refrigerant circulation circuit. The refrigerant circulation circuit is further provided with a heat dissipation branch connected in parallel downstream of the outdoor heat exchanger 3. The refrigerant radiator 5 and the first flow regulating valve 6 are provided in the heat dissipation branch, with the first flow regulating valve 6 located upstream of the refrigerant radiator 5.

[0030] Specifically, in this embodiment, the outdoor heat exchanger 3 is a condenser, the indoor heat exchanger 4 is an evaporator, the reversing valve 2 is a four-way valve, the first flow control valve 6 and the second flow control valve 7 are electronic expansion valves, and the refrigerant radiator 5 is used to dissipate heat from the air conditioner's mainboard. The various refrigeration components are connected by piping. Based on the refrigerant flow, the refrigerant circulates during cooling as follows: compressor 1 - four-way valve - outdoor heat exchanger 3 - first flow control valve 6 - refrigerant radiator 5 - second flow control valve 7 - indoor heat exchanger 4 - four-way valve - compressor 1. The heat dissipation branch is connected in parallel with the main refrigerant circulation circuit, specifically on the outlet side of the condenser. Both the first flow control valve 6 and the refrigerant radiator 5 are located on the heat dissipation branch, with the first flow control valve 6 upstream and the refrigerant radiator 5 downstream. As a result, after exiting the condenser, the refrigerant splits into two parallel paths: one path passes through the first flow control valve 6, enters the refrigerant radiator 5, and then returns to the second flow control valve 7. The other path is directly connected to the second flow control valve 7. After exiting the condenser, the refrigerant passes through the first flow control valve 6 before entering the refrigerant radiator 5. Adjusting the opening of the first flow control valve 6 controls the temperature and flow of the refrigerant entering the refrigerant radiator 5, thereby adjusting the heat dissipation capacity of the refrigerant radiator 5 and ensuring optimal heat dissipation from the motherboard. Specifically, under high temperature conditions, the motherboard's heat dissipation is poor. In such cases, reducing the opening of the first flow control valve 6 lowers the temperature of the refrigerant entering the refrigerant radiator 5, increasing its heat dissipation capacity and, consequently, improving the motherboard's heat dissipation efficiency.

[0031] Through this embodiment, during high-temperature cooling, the temperature and flow of the refrigerant entering the refrigerant radiator 5 can be controlled by adjusting the opening of the first flow regulating valve 6, thereby improving the heat dissipation capacity of the main board under high-temperature conditions, avoiding the frequency limitation of the compressor 1 when the temperature of the main board is too high, increasing the maximum operating frequency of the compressor 1, and improving high-temperature performance and reliability.

[0032] See also Figure 2 , Figure 2 This is a flow chart of a control method for an air conditioner according to an embodiment of the present invention. The air conditioner applied to the above embodiment has been described in detail in the above embodiment. For the sake of brevity, it will not be repeated here. The control method for the air conditioner is described in detail below. Figure 2 As shown, the method includes the following steps: S110-S120.

[0033] S110: If the outdoor ambient temperature meets a preset high temperature condition and the operating mode of the air conditioner is a cooling mode, obtaining a dew point temperature and an IPM module temperature corresponding to the outdoor ambient temperature, and determining a temperature difference between the dew point temperature and the IPM module temperature;

[0034] S120. Adjust the opening of the first flow regulating valve according to the temperature difference and a preset temperature value.

[0035] In this embodiment, after the air conditioner is turned on, it will first obtain the outdoor ambient temperature, which can be obtained through the outdoor unit's temperature sensor. Then, based on the outdoor ambient temperature, it will determine which preset temperature condition is currently in, including a preset high temperature condition, a preset normal temperature condition, and a preset low temperature condition. The preset high temperature condition can be, for example, greater than or equal to 30°C. The control actions performed under different temperature conditions are different. If the current temperature condition is the preset high temperature condition, then the current operating mode of the air conditioner will be determined, which generally includes cooling mode and heating mode. If it is in heating mode, the outdoor ambient temperature is too high and the air conditioner cannot be turned on. If the temperature is within the range where it can be turned on, it means that the outdoor ambient temperature is below 40°C. After the air conditioner is running, the indoor ambient temperature will quickly reach the set temperature and shut down. Therefore, fully opening the second flow control valve can ensure the reliability of the mainboard. If it is in cooling mode, the dew point temperature corresponding to the outdoor ambient temperature and the IPM module temperature are first obtained.

[0036] The dew point temperature refers to the temperature at which air cools to saturation, with constant water vapor content and air pressure. Simply put, it's the temperature at which water vapor in the air begins to condense into dew or frost. When the surface temperature of an object is lower than the dew point of the surrounding air, water vapor in the air condenses into water droplets on that surface, resulting in condensation. Different outdoor ambient temperatures correspond to different dew point temperatures. The dew point temperature is determined by first obtaining the outdoor ambient temperature, then querying the database preset within the mainboard program. The dew point temperature range is then determined, and the highest value within this range is selected for calculation. Because the dew point temperature varies under different humidity conditions for the same outdoor ambient temperature, and since there are no humidity sensors outdoors, the dew point temperature obtained is a range. To avoid condensation, the highest dew point temperature is typically selected for calculation.

[0037] The Intelligent Power Module (IPM) is a crucial component in air conditioning systems. It integrates multiple power semiconductor devices and drive circuits to control and convert power to meet the demands of the air conditioner compressor and other loads. The IPM module is located on the motherboard and includes a built-in temperature sensor that monitors its temperature. The IPM is the main heat source for the motherboard, and the temperature rise of the motherboard can be determined by measuring the temperature of the IPM.

[0038] Currently, to prevent condensation on the mainboard, refrigerant enters the refrigerant heat pipe directly after exiting the condenser without throttling. Under high outdoor temperatures, excessively high mainboard temperatures limit the compressor's maximum operating frequency, reducing high-temperature performance. To reduce the mainboard temperature while preventing condensation, this embodiment controls the temperature and flow rate entering the refrigerant radiator by measuring the difference between the IPM module temperature and the dew point temperature. This improves the mainboard's heat dissipation capacity, compressor frequency, and mainboard reliability under high-temperature conditions. Specifically, after obtaining the dew point temperature and the IPM module temperature, the difference between the two is calculated to determine the temperature difference. It is understood that this temperature difference incorporates the dew point temperature. Therefore, subsequent adjustments can ensure that the refrigerant radiator does not drop below the dew point temperature, causing condensation on the mainboard. This prevents condensation on the inverter air conditioner mainboard from causing a short circuit due to the cooling of the refrigerant radiator. This temperature difference can be used to determine the current temperature rise of the mainboard. A larger temperature difference indicates a greater temperature rise and poorer heat dissipation. The opening of the first flow control valve is adjusted based on this temperature difference and a preset temperature value. Changing the opening of the first flow control valve changes the temperature of the refrigerant entering the refrigerant radiator. When the opening is reduced, the refrigerant pressure decreases. This, through the Joule-Thomson effect and changes in enthalpy, lowers the refrigerant temperature, thereby reducing the refrigerant's entry temperature and improving the motherboard's heat dissipation.

[0039] Through this embodiment, during high-temperature cooling, the temperature and flow rate entering the refrigerant radiator are controlled by the difference between the IPM module temperature and the dew point temperature and the preset temperature value, thereby improving the heat dissipation capacity of the mainboard, the compressor frequency and the reliability of the mainboard under high-temperature conditions, effectively reducing the mainboard temperature while preventing condensation on the mainboard, increasing the maximum operating frequency, and improving high-temperature performance.

[0040] In one embodiment, if Figure 3 As shown, the step S120 includes: S121-S122.

[0041] S121, determining whether the temperature difference is greater than or equal to a first preset temperature value;

[0042] S122: If the temperature difference is greater than or equal to a first preset temperature value, control the first flow regulating valve to reduce its opening at a first action speed.

[0043] In this embodiment, the IPM module temperature is T IPM , dew point temperature is T 露 , the temperature difference is ΔT, the first preset temperature value is T1, the range of T1 can be 20℃~50℃, ΔT=T IPM -T 露If AT is greater than T1, it indicates that the heat dissipation effect of the mainboard is poor or the heat dissipation effect of the mainboard is poor during the high-power period of the mainboard, which leads to a high temperature rise of the mainboard. In order to prevent the device of the mainboard from burning out and prevent the compressor from triggering the frequency reduction protection due to the high temperature rise of the mainboard, which reduces the refrigeration effect, it is necessary to increase the heat dissipation effect of the refrigerant. By reducing the opening degree of the first flow regulating valve, the refrigerant is throttled to a certain extent, the temperature of the refrigerant entering the mainboard radiator is reduced, and the heat exchange effect is improved. When reducing the opening degree of the first flow regulating valve, the first flow regulating valve is reduced according to the first action speed, and the first action speed can be selected to be 5 steps / s-10 steps / s. Through the embodiment, the heat dissipation capacity of the mainboard under high temperature condition is improved to improve the frequency of the compressor and the reliability of the mainboard, thereby improving the performance of the air conditioner under high temperature condition.

[0044] In an embodiment, as shown in Figure 4 , the step S122 further comprises steps S123-S124.

[0045] S123, acquire the temperature drop rate of the IPM module, and determine whether the temperature drop rate is less than a preset temperature drop rate threshold value;

[0046] S124, if the temperature drop rate is less than the preset temperature drop rate threshold value, control the first flow regulating valve to reduce the opening degree according to a second action speed, wherein the second action speed is less than the first action speed.

[0047] In the embodiment, the temperature drop rate is V 降 , the temperature of the initial moment of the temperature drop of the first flow regulating valve is T0, the temperature of the moment after 20 seconds is T 20 , and then V 降 =(T 20 -T0) / T0. The preset temperature drop rate threshold value is V 阈 , and the preset temperature drop rate threshold value is the alarm value of the temperature drop rate, which can be 0.32-0.21. If it is lower than the value, it indicates that the temperature drop speed is too fast. If the temperature drop speed is too fast, it is also easy to cause over-regulation, which leads to condensation of the mainboard. Therefore, the temperature drop speed and the temperature drop effect of the mainboard need to be controlled within a reasonable range. Specifically, the embodiment compares V 降 and V 阈 . If V 降 <V 阈 , it indicates that the temperature drop is too fast at this time, and the mainboard has the risk of condensation, and the temperature drop speed needs to be slowed down. By controlling the first flow regulating valve to reduce the opening degree according to the second action speed, the opening degree of the first flow regulating valve is reduced at a slow speed, and the second action speed is lower than the speed of the first action speed. The second action speed can be selected to be 1 step / s-3 steps / s. Through the embodiment, by reducing the opening degree of the first flow regulating valve at a slow speed, over-regulation is prevented to cause condensation of the mainboard, and the reliability is improved.

[0048] In one embodiment, if Figure 5 As shown, the step S120 also includes: S125-S126.

[0049] S125. Determine whether the temperature difference is less than the first preset temperature value and greater than or equal to a second preset temperature value, wherein the second preset temperature value is less than the first preset temperature value;

[0050] S126: If the temperature difference is less than the first preset temperature value and greater than or equal to the second preset temperature value, control the first flow regulating valve to maintain a current opening.

[0051] In this embodiment, the second preset temperature value is T2, and the range of T2 can be 10℃~20℃. If ΔT≥T1 is not true, the next level of temperature judgment is continued, and it is judged that T2≤ΔT <T1,若是说明此时主板的温升不高,不管是温降效果还是器件的发热保持在一定比较良好的换热状态,不需要对第一流量调节阀的状态进行调整,保持之前的状态即可,因此控制第一流量调节阀保持当前开度。

[0052] In one embodiment, if Figure 6 As shown, the step S120 also includes: S127-S128.

[0053] S127, determining whether the temperature difference is less than the second preset temperature value;

[0054] S128. If the temperature difference is less than the second preset temperature value, adjust the opening of the first flow regulating valve to the maximum.

[0055] In this embodiment, if T2≤ΔT <T1为否的情形,则继续进行下一级的温度判断,判断ΔT<T2,若是说明此时主板的温升较低,为了防止主板结露,需要把第一流量调节阀全开,也即相当于冷媒不经过节流直接进入冷媒散热器,此情形冷媒温度较高,因此可以避免主板温度进一步降低而凝露,避免影响主板的可靠性。

[0056] In other embodiments, the control method of the air conditioner further includes: if the outdoor ambient temperature meets a preset normal temperature condition and the operation mode of the air conditioner is a cooling mode, adjusting the opening of the first flow regulating valve to the maximum.

[0057] Specifically, after the air conditioner is turned on, it first obtains the outdoor ambient temperature. It then determines the current preset temperature condition based on the outdoor ambient temperature, which includes a preset high temperature condition, a preset normal temperature condition, and a preset low temperature condition. The preset normal temperature condition can be between 20°C and 30°C, and different control actions are performed under different temperature conditions. If the current temperature condition is the preset normal temperature condition, the air conditioner's current operating mode is then determined, which generally includes cooling mode and heating mode. If it is in cooling mode, the first flow control valve is controlled to open to the maximum, that is, the first flow control valve is fully open, and the second flow control valve automatically adjusts according to the exhaust temperature. If it is in heating mode, the second flow control valve is controlled to open to the maximum, that is, the second flow control valve is fully open, and the first flow control valve automatically adjusts according to the exhaust temperature. This indicates that the ambient temperature is moderate, and the refrigerant exiting the condenser does not need to be throttled and flows directly through the mainboard, resulting in a better temperature reduction effect. Therefore, to prevent condensation on the mainboard, the temperature of the refrigerant entering the mainboard is kept higher than the ambient temperature.

[0058] In other embodiments, the air conditioner control method further includes: if the outdoor ambient temperature meets a preset low temperature condition, controlling the first flow regulating valve to close.

[0059] Specifically, after the air conditioner is turned on, it first obtains the outdoor ambient temperature. Based on the outdoor ambient temperature, it then determines which preset temperature condition it is currently in, including a preset high temperature condition, a preset normal temperature condition, and a preset low temperature condition. The preset low temperature condition can be below 20°C, and different control actions are performed under different temperature conditions. Under low outdoor temperatures, the outdoor condenser has a strong heat exchange rate, and the refrigerant leaving it is at a low temperature. This low-temperature refrigerant will condense on the mainboard when it passes through it, and the low temperature of the mainboard components will affect reliability. Furthermore, under low outdoor temperatures, the refrigerant cooled by the condenser will be heated when it passes through the mainboard, causing the refrigerant temperature to rise and reduce performance. To avoid this, this embodiment closes the first flow control valve, effectively de-energizing the first flow control valve. When de-energized, the first flow control valve is in a normally closed state. This prevents refrigerant from passing through the refrigerant radiator. By shutting off the refrigerant in the refrigerant radiator, natural heat exchange is used to raise the mainboard temperature to a reasonable range, preventing condensation and excessively low temperatures from affecting reliability. Moreover, by cutting off the refrigerant in the refrigerant radiator, the refrigerant does not pass through the mainboard and will not be affected by the high temperature of the mainboard, which can maintain a lower cold outlet temperature and improve the heat exchange performance.

[0060] Reference Figure 7 In order to further illustrate the control method of the air conditioner of this embodiment, the control logic of the specific working process of the air conditioner is used for explanation below, as follows.

[0061] First, obtain the outdoor ambient temperature T 设Then, it is judged whether the outdoor environment is high temperature, normal temperature or low temperature.

[0062] If T 设 ≥ 30℃, it means that the current is high temperature condition, and the running mode of the air conditioner is acquired. If the running mode is heating mode, the second flow regulating valve is controlled to be fully opened. If the running mode is cooling mode, the temperature difference ΔT between the IPM module temperature and the dew point temperature is calculated. First, it is judged whether ΔT ≥ T1, if yes, the opening degree of the first flow regulating valve is quickly reduced. Then, in order to avoid over-regulation, the temperature drop rate V 降 of the first flow regulating valve is acquired, and it is judged whether V 降 < V 阈 , if yes, the opening degree of the first flow regulating valve is slowly reduced to avoid over-regulation. If ΔT ≥ T1 is no, it is continued to judge whether T2 ≤ ΔT < T1, if yes, the opening degree of the first flow regulating valve is kept unchanged. If T2 ≤ ΔT < T1 is no, it is continued to judge whether ΔT < T2, if yes, the first flow regulating valve is controlled to be fully opened.

[0063] If 20℃ ≤ T 设 < 30℃, it means that the current is normal temperature condition, and the first flow regulating valve is fully opened when the running mode is cooling, and the second flow regulating valve is fully opened when the running mode is heating.

[0064] If T 设 < 20℃, it means that the current is low temperature condition, and the first flow regulating valve is powered off and kept in normal closed state.

[0065] In summary, according to the outdoor environment temperature, the dew point temperature is judged, and the running mode of the air conditioner and the IPM module temperature of the mainboard are combined to regulate the temperature and flow of the refrigerant entering the mainboard refrigerant radiator. In low temperature heating and low temperature cooling, the refrigerant in the refrigerant radiator is cut off to improve the heat exchange effect of the air conditioner and the reliability of the mainboard, and the performance is improved. In high temperature cooling, the temperature difference between the IPM module temperature and the dew point temperature and the temperature drop rate of the IPM module temperature are used to control the temperature and flow of the refrigerant entering the mainboard refrigerant radiator, so as to improve the heat dissipation capacity of the mainboard, the compressor frequency and the reliability of the mainboard under high temperature condition.

[0066] Figure 8 is a schematic block diagram of a control device 200 of an air conditioner provided by the embodiment of the present application. As shown in Figure 8 , corresponding to the above control method of the air conditioner, the present application further provides a control device 200 of an air conditioner. The control device 200 of the air conditioner comprises units for executing the above control method of the air conditioner, and the device can be configured in a computer equipment. Specifically, referring to Figure 8 , the control device 200 of the air conditioner comprises an acquisition unit 201 and a regulating unit 202.

[0067] Among them, the acquisition unit 201 is used to obtain the dew point temperature and IPM module temperature corresponding to the outdoor ambient temperature if the outdoor ambient temperature meets the preset high temperature condition and the operating mode of the air conditioner is the cooling mode, and determine the temperature difference between the dew point temperature and the IPM module temperature; the adjustment unit 202 is used to adjust the opening of the first flow control valve according to the temperature difference and the preset temperature value.

[0068] In one embodiment, the adjusting unit 202 includes: a first judging unit and a fast reducing unit.

[0069] Among them, the first judgment unit is used to judge whether the temperature difference is greater than or equal to the first preset temperature value; the rapid reduction unit is used to control the first flow control valve to reduce the opening according to the first action speed if the temperature difference is greater than or equal to the first preset temperature value.

[0070] In one embodiment, the adjusting unit 202 further includes: a second determining unit and a slow reducing unit.

[0071] Among them, the second judgment unit is used to obtain the temperature drop rate of the IPM module and determine whether the temperature drop rate is less than the preset temperature drop rate threshold; the slow reduction unit is used to control the first flow control valve to reduce the opening according to the second action speed if the temperature drop rate is less than the preset temperature drop rate threshold, wherein the second action speed is less than the first action speed.

[0072] In one embodiment, the adjusting unit 202 further includes: a third judging unit and a holding unit.

[0073] Among them, the third judgment unit is used to judge whether the temperature difference is less than the first preset temperature value and greater than or equal to the second preset temperature value, wherein the second preset temperature value is less than the first preset temperature value; the maintaining unit is used to control the first flow regulating valve to maintain the current opening if the temperature difference is less than the first preset temperature value and greater than or equal to the second preset temperature value.

[0074] In one embodiment, the adjustment unit 202 further includes: a fourth judgment unit and a full-open unit.

[0075] Among them, the fourth judgment unit is used to judge whether the temperature difference is less than the second preset temperature value; the full-opening unit is used to adjust the opening of the first flow control valve to the maximum if the temperature difference is less than the second preset temperature value.

[0076] In one embodiment, the air conditioner control device 200 further includes: a second full-opening unit and a closing unit.

[0077] Among them, the second fully-open unit is used to adjust the opening of the first flow regulating valve to the maximum if the outdoor ambient temperature meets the preset normal temperature condition and the operating mode of the air conditioner is the cooling mode; the closing unit is used to control the first flow regulating valve to close if the outdoor ambient temperature meets the preset low temperature condition.

[0078] The control device 200 of the air conditioner can be implemented in the form of a computer program. The computer program can be used in Figure 9 Runs on the computer equipment shown.

[0079] See also Figure 9 , Figure 9 5 is a schematic block diagram of a computer device provided in an embodiment of the present application. The computer device 500 may be a terminal.

[0080] See Figure 9 The computer device 500 includes a processor 502 , a memory, and a network interface 505 connected via a system bus 501 , wherein the memory may include a non-volatile storage medium 503 and an internal memory 504 .

[0081] The non-volatile storage medium 503 can store an operating system 5031 and a computer program 5032. The computer program 5032 includes program instructions, which, when executed, can enable the processor 502 to execute a method for controlling an air conditioner.

[0082] The processor 502 is used to provide computing and control capabilities to support the operation of the entire computer device 500.

[0083] The internal memory 504 provides an environment for the operation of the computer program 5032 in the non-volatile storage medium 503. When the computer program 5032 is executed by the processor 502, the processor 502 can execute a method for controlling an air conditioner.

[0084] The network interface 505 is used to communicate with other devices through the network. Figure 9 The structure shown in the figure is merely a block diagram of a portion of the structure related to the solution of the present application, and does not constitute a limitation on the computer device 500 to which the solution of the present application is applied. The specific computer device 500 may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0085] The processor 502 is configured to run a computer program 5032 stored in the memory to implement the steps of the above method.

[0086] It should be understood that in the embodiment of the present application, the processor 502 may be a central processing unit (CPU), and the processor 502 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0087] Those skilled in the art will appreciate that all or part of the steps in the method of the above-described embodiment can be implemented by instructing the relevant hardware through a computer program. The computer program includes program instructions, which can be stored in a storage medium that is computer-readable. The program instructions are executed by at least one processor in the computer system to implement the steps in the method of the above-described embodiment.

[0088] Therefore, the present invention also provides a storage medium. The storage medium may be a computer-readable storage medium. The storage medium stores a computer program, wherein the computer program includes program instructions. When the program instructions are executed by a processor, the processor performs the steps of the above method.

[0089] The storage medium may be any computer-readable storage medium that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a magnetic disk, or an optical disk.

[0090] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the composition and steps of each example according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0091] In the several embodiments provided herein, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the various units is merely a logical functional division, and actual implementation may employ other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not implemented.

[0092] The steps in the methods of the embodiments of the present invention may be adjusted in order, combined, or deleted as needed. The units in the devices of the embodiments of the present invention may be combined, divided, or deleted as needed. Furthermore, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0093] If this integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or all or 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 a number of instructions for causing a computer device to execute all or part of the steps of the method described in various embodiments of the present invention.

[0094] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0095] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, to the extent such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to encompass such changes and modifications.

[0096] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner includes a refrigerant circulation circuit, a heat dissipation branch is provided in the refrigerant circulation circuit, the heat dissipation branch is connected in parallel to the downstream of the outdoor heat exchanger in the refrigerant circulation circuit, a refrigerant radiator and a first flow regulating valve are provided on the heat dissipation branch, and the first flow regulating valve is located upstream of the refrigerant radiator. The method includes: If the outdoor ambient temperature meets a preset high temperature condition and the operating mode of the air conditioner is a cooling mode, obtaining a dew point temperature and an IPM module temperature corresponding to the outdoor ambient temperature, and determining a temperature difference between the dew point temperature and the IPM module temperature; determining whether the temperature difference is greater than or equal to a first preset temperature value; if the temperature difference is greater than or equal to the first preset temperature value, controlling the first flow regulating valve to reduce its opening according to a first action speed; Obtain the temperature drop rate of the IPM module and determine whether the temperature drop rate is less than a preset temperature drop rate threshold; if the temperature drop rate is less than the preset temperature drop rate threshold, control the first flow control valve to reduce the opening according to a second action speed, wherein the second action speed is less than the first action speed.

2. The method according to claim 1, characterized in that The method further comprises: Determining whether the temperature difference is less than the first preset temperature value and greater than or equal to a second preset temperature value, wherein the second preset temperature value is less than the first preset temperature value; If the temperature difference is less than the first preset temperature value and greater than or equal to the second preset temperature value, the first flow regulating valve is controlled to maintain a current opening.

3. The method according to claim 2, characterized in that The method further comprises: Determining whether the temperature difference is less than the second preset temperature value; If the temperature difference is less than the second preset temperature value, the opening of the first flow regulating valve is adjusted to the maximum.

4. The method according to claim 1, wherein The method further comprises: If the outdoor ambient temperature meets the preset normal temperature condition and the operation mode of the air conditioner is the cooling mode, adjusting the opening of the first flow regulating valve to the maximum; and / or, If the outdoor ambient temperature meets the preset low temperature condition, the first flow regulating valve is controlled to close.

5. An air conditioner, characterized in that: include: A compressor, a reversing valve, an outdoor heat exchanger, an indoor heat exchanger, a refrigerant radiator, a first flow regulating valve and a second flow regulating valve, wherein the compressor, the reversing valve, the outdoor heat exchanger, the second flow regulating valve, the indoor heat exchanger and the reversing valve are connected in sequence to form a refrigerant circulation loop, wherein the control device of the air conditioner is used to execute the method described in any one of claims 1 to 4.

6. A control device for an air conditioner, characterized in that: The apparatus comprises means for executing the method according to any one of claims 1 to 4 above.

7. A computer device, characterized in that: The computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the method according to any one of claims 1 to 4 when executing the computer program.

8. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 can be implemented.

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