Control method and control device of air conditioner, air conditioner and vehicle

Abstract

The embodiment of the invention discloses a control method and device of an air conditioner, the air conditioner and a vehicle, and belongs to the technical field of air conditioning. The control method comprises the steps that the air inlet temperature and the air outlet temperature of an indoor unit are obtained, and the indoor environment temperature is obtained; determining a first temperature difference according to the absolute value of the difference between the air inlet temperature and the indoor environment temperature, and determining a second temperature difference according to the absolute value of the difference between the air outlet temperature and the indoor environment temperature; determining a temperature difference correction value according to the first temperature difference and the second temperature difference; and controlling compressor frequency according to the temperature difference correction value. According to the embodiment of the invention, the frequency of the compressor is accurately regulated and controlled under the condition that an outdoor environment temperature sensing bulb and a compressor exhaust temperature sensing bulb are omitted, the wiring space of the outdoor unit is saved, the cost is saved, and miniaturization design of the outdoor unit is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a control method and a control device for an air conditioner, an air conditioner and a vehicle. Background Art

[0002] Parking air conditioners are specially designed for large freight vehicles such as trucks. They are usually installed on trucks or vans and can be used when waiting or resting, as well as during long-distance transportation. With the rapid development of the logistics industry, in order to save transportation costs, truck drivers usually use their trucks as their homes, which also makes truck drivers have higher requirements for the comfort and power consumption of parking air conditioners. Therefore, the miniaturization and simplification of parking air conditioners and how to intelligently control the air conditioning compressor to operate at a reasonable operating frequency according to the power of the on-board battery have become difficult problems in the industry.

[0003] Under the premise of achieving the purpose of cooling and energy saving, the air conditioner must not only achieve precise control of the compressor operating frequency, but also ensure the reliability of the air conditioner. In the prior art, the corresponding temperature points are usually obtained based on the external environment temperature sensing package and the exhaust temperature sensing package set on the air conditioner outdoor unit, and the operating frequency of the compressor is precisely controlled according to the corresponding temperature points. However, setting the external environment temperature sensing package and the exhaust temperature sensing package on the air conditioner outdoor unit will make the wiring of the air conditioner outdoor unit complicated, occupy the space of the air conditioner outdoor unit, which is not conducive to the miniaturization design of the air conditioner outdoor unit, and also lead to a high cost of the air conditioner outdoor unit. Summary of the invention

[0004] The embodiments of the present application provide a control method, a control device, an air conditioner and a vehicle for an air conditioner, so as to at least solve the technical problem that the frequency of the compressor is currently controlled by obtaining corresponding temperature points through an external environment temperature sensing package and an exhaust temperature sensing package set in an air conditioner outdoor unit, resulting in complex outdoor unit wiring and large space occupation.

[0005] According to a first aspect of an embodiment of the present application, a method for controlling an air conditioner is provided, the method comprising:

[0006] Get the air inlet temperature and air outlet temperature of the indoor unit, and get the indoor ambient temperature;

[0007] Determine a first temperature difference according to an absolute value of a difference between the inlet air temperature and the indoor ambient temperature, and determine a second temperature difference according to an absolute value of a difference between the outlet air temperature and the indoor ambient temperature;

[0008] determining the temperature difference correction value according to the first temperature difference and the second temperature difference;

[0009] The compressor frequency is controlled according to the temperature difference correction value.

[0010] By adopting this embodiment, the compressor frequency can be controlled by utilizing the indoor unit's inlet air temperature, outlet air temperature and indoor ambient temperature, and the outdoor ambient temperature sensing package and the compressor exhaust temperature sensing package can be omitted, thus saving wiring space for the outdoor unit, saving costs, and facilitating the miniaturization design of the outdoor unit.

[0011] In combination with the first aspect, in an optional implementation of the embodiment of the present application, determining the temperature difference correction value according to the first temperature difference and the second temperature difference includes:

[0012] The temperature difference correction value is a function of the first temperature difference and the second temperature difference. The larger the first temperature difference is, the larger the temperature difference correction value is; and the larger the second temperature difference is, the larger the temperature difference correction value is.

[0013] And / or, the temperature difference correction value, the first temperature difference and the second temperature difference satisfy the following formula: ΔT 修 =K1×ΔT 进 +K2×ΔT 出 +K3, where: ΔT 修 is the temperature difference correction value, ΔT 进 is the first temperature difference, ΔT 出 is the second temperature difference, and K1, K2, and K3 are all constants ranging from 0 to 1.

[0014] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the temperature difference correction value range to which the temperature difference correction value belongs has a preset corresponding relationship with the compressor frequency, and in the preset corresponding relationship, the temperature difference correction value range with a larger temperature difference correction value corresponds to a larger compressor frequency;

[0015] Controlling the compressor frequency according to the temperature difference correction value includes: determining the compressor target frequency according to the preset corresponding relationship, and controlling the compressor to operate at the target frequency.

[0016] In combination with the first aspect, in an optional implementation of the embodiment of the present application, after the step of controlling the compressor frequency according to the temperature difference correction value, the control method further includes:

[0017] Determine whether the indoor ambient temperature reaches the set temperature;

[0018] When the indoor ambient temperature reaches the set temperature, the compressor is controlled to stop;

[0019] When the indoor ambient temperature does not reach the set temperature, the outdoor fan phase current is determined, and whether to control the compressor to continue to run is determined according to the outdoor fan phase current.

[0020] In combination with the first aspect, in an optional implementation of the embodiment of the present application, determining whether to control the compressor to continue running according to the outdoor fan phase current includes:

[0021] Determine the current correction value according to the product of the outdoor fan phase current and the current correction coefficient;

[0022] When the current correction value is within the target current range, controlling the compressor to continue running;

[0023] When the current correction value is smaller than the minimum value of the target current range, or greater than or equal to the maximum value of the target current range, the compressor is controlled to stop.

[0024] In combination with the first aspect, in an optional implementation of the embodiment of the present application, in the step of controlling the compressor to continue running, it is determined whether to adjust the compressor frequency based on the current compressor frequency and the current correction value.

[0025] In combination with the first aspect, in an optional implementation of the embodiment of the present application, determining whether to adjust the compressor frequency according to the current compressor frequency and the current correction value includes:

[0026] When the current compressor frequency is less than or equal to the set frequency, the compressor is controlled to maintain the original frequency and continue to run;

[0027] When the current compressor frequency is greater than the set frequency and the minimum value of the target current range is less than or equal to the current correction value and less than the set current value, the compressor is controlled to maintain the original frequency operation;

[0028] When the compressor frequency is greater than the set frequency and the set current value is less than or equal to the current correction value and less than the maximum value of the target current range, the compressor frequency is controlled to be reduced and then continue to operate.

[0029] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the value range of the current correction coefficient is 1.1 to 1.2;

[0030] And / or, the target current range is 0 to 5A.

[0031] According to the second aspect of an embodiment of the present application, a control device is provided, which includes one or more processors and a non-temporary computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement the control method proposed in the first aspect of the embodiment of the present application.

[0032] According to a third aspect of the embodiments of the present application, an air conditioner is provided, which adopts the control method proposed in the first aspect of the embodiments of the present application, or includes the control device proposed in the second aspect of the embodiments of the present application.

[0033] According to a fourth aspect of an embodiment of the present application, a vehicle is provided, wherein the vehicle has the air conditioner proposed in the third aspect of the embodiment of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is one of the control method flow charts provided in the embodiments of the present application.

[0035] Figure 2 This is the second control method flow chart provided in the embodiment of the present application.

[0036] Figure 3 This is one of the control method flow charts according to a specific example of an embodiment of the present application.

[0037] Figure 4 This is the second flow chart of the control method according to a specific example of an embodiment of the present application.

[0038] Figure 5 It is a structural block diagram of the control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0040] It should be understood that the "plurality" mentioned in this article refers to two or more. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second" and so on are used to distinguish between the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first", "second" and so on do not limit the quantity and execution order, and the words "first", "second" and so on do not limit certain different

[0041] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0042] In the related art, the external environment temperature and the compressor exhaust temperature are usually detected based on the external environment temperature sensor and the exhaust temperature sensor installed on the air-conditioning outdoor unit, and then the compressor operating frequency is accurately controlled based on the external environment temperature and the compressor exhaust temperature. However, this will cause the wiring of the air-conditioning outdoor unit to be complicated, occupy more space of the air-conditioning outdoor unit, which is not conducive to the miniaturization design of the outdoor unit, and at the same time increase the production cost of the air-conditioning outdoor unit.

[0043] In order to solve the above technical problems, this embodiment proposes a control method for an air conditioner, and the control method includes:

[0044] Get the air inlet temperature and air outlet temperature of the indoor unit, and get the indoor ambient temperature;

[0045] The first temperature difference is determined according to the absolute value of the difference between the inlet air temperature and the indoor ambient temperature, and the second temperature difference is determined according to the absolute value of the difference between the outlet air temperature and the indoor ambient temperature;

[0046] Determine a temperature difference correction value according to the first temperature difference and the second temperature difference;

[0047] The compressor frequency is controlled according to the temperature difference correction value.

[0048] This embodiment controls the compressor frequency by utilizing the indoor unit inlet temperature, outlet temperature and indoor ambient temperature, which can eliminate the outdoor ambient temperature sensing package and the compressor exhaust temperature sensing package, save the wiring space of the outdoor unit, save costs, and facilitate the miniaturization design of the outdoor unit.

[0049] The technical solution of this embodiment is described in detail below in conjunction with the accompanying drawings. The following implementation modes and examples may be combined with each other if there is no conflict.

[0050] First, the application scenario of the control method of this embodiment is briefly introduced.

[0051] The control method of this embodiment is applied to an air conditioner, which includes an indoor unit and an outdoor unit. The indoor unit is arranged in an indoor environment, and the outdoor unit is arranged in an outdoor environment. The indoor unit includes an inner casing, an indoor heat exchanger and an inner fan. The inner casing is provided with an air inlet and an air outlet. The setting positions of the air inlet and the air outlet are not limited. In one example, the air inlet is located above the inner casing, and the air outlet is located at the front lower part of the inner casing. An air flow channel is formed between the air inlet and the air outlet. The inner fan and the indoor heat exchanger are both arranged in the inner casing and located in the air flow channel, and the indoor heat exchanger is located upstream of the inner fan in the air flow direction.

[0052] The outdoor unit includes an outer casing, an outdoor heat exchanger, an outdoor fan and a compressor, wherein the outdoor heat exchanger and the compressor are both located in the outer casing, a shell surface of the outer casing is provided with an installation opening, and the outdoor fan is arranged at the installation opening to dissipate the heat generated by the outdoor heat exchange and / or the compressor to the external environment.

[0053] The air conditioner also includes an inlet temperature sensing package, an outlet temperature sensing package and an ambient temperature sensing package. The inlet temperature sensing package is preferably arranged at the air inlet of the indoor unit to detect the inlet temperature of the indoor unit. The outlet temperature sensing package is preferably arranged at the air outlet of the indoor unit to detect the outlet temperature of the indoor unit. The ambient temperature sensing package is preferably arranged at a position of the indoor unit away from the air inlet and outlet to detect the indoor ambient temperature.

[0054] The air conditioner of this embodiment can be used to perform air conditioning in a user's room, and can also be used as a vehicle air conditioner and arranged in a vehicle. In one example, the air conditioner is applied to a vehicle, the air conditioner indoor unit is arranged in the vehicle's cab, and the air conditioner outdoor unit is arranged outside the vehicle's cab.

[0055] Next, the control method of this embodiment is introduced in detail.

[0056] This embodiment proposes a control method for an air conditioner. Figure 1 The control flow chart of the control method includes the following steps:

[0057] S11, obtaining the air inlet temperature and air outlet temperature of the indoor unit, and obtaining the indoor ambient temperature;

[0058] S12, determining a first temperature difference according to the absolute value of the difference between the inlet air temperature and the indoor ambient temperature, and determining a second temperature difference according to the absolute value of the difference between the outlet air temperature and the indoor ambient temperature;

[0059] S13, determining a temperature difference correction value according to the first temperature difference and the second temperature difference;

[0060] S14. Control the compressor frequency according to the temperature difference correction value.

[0061] In this embodiment, during the operation of the air conditioner, the air inlet temperature sensing package provided at the air inlet of the indoor unit of the air conditioner and the air outlet temperature sensing package provided at the air outlet are used to detect the air inlet temperature T of the indoor unit in real time or periodically. 进 and outlet temperature T 出 , and use the ambient temperature sensor to detect the indoor ambient temperature T in real time or periodically, and then adjust the indoor ambient temperature T according to the inlet air temperature T 进 The absolute value of the difference between the indoor ambient temperature T determines the first temperature difference ΔT 进 =|T 进 -T∣, according to the outlet air temperature T 出 The absolute value of the difference between the indoor ambient temperature T determines the second temperature difference ΔT 出 =|T 出 -T|, and determine the temperature difference correction value ΔT according to the first temperature difference and the second temperature difference 修 .

[0062] Among them, the temperature difference correction value ΔT 修 Reflects the load condition of the indoor unit side, ΔT 修 The larger the temperature difference, the higher the load on the indoor unit side and the higher the required compressor frequency. 修 After that, the compressor frequency can be controlled according to the temperature difference correction value to ensure the reliable operation of the system.

[0063] In an optional implementation, the temperature difference correction value is determined according to the first temperature difference and the second temperature difference, including: the temperature difference correction value is a function of the first temperature difference and the second temperature difference, and the larger the first temperature difference, the larger the temperature difference correction value; the larger the second temperature difference, the larger the temperature difference correction value.

[0064] In an optional implementation, determining the temperature difference correction value according to the first temperature difference and the second temperature difference includes: the temperature difference correction value, the first temperature difference and the second temperature difference satisfy the following formula: ΔT 修 =K1×ΔT 进 +K2×ΔT 出 +K3, where: ΔT 修 is the temperature difference correction value, ΔT 进 is the first temperature difference, ΔT 出 is the second temperature difference, and K1, K2, and K3 are all constants ranging from 0 to 1.

[0065] In an optional implementation, the temperature difference correction value range to which the temperature difference correction value belongs has a preset corresponding relationship with the compressor frequency. In the preset corresponding relationship, the larger the temperature difference correction value, the larger the compressor frequency corresponding to the temperature difference correction value range; controlling the compressor frequency according to the temperature difference correction value includes: determining the compressor target frequency according to the preset corresponding relationship, and controlling the compressor to operate at the target frequency.

[0066] This embodiment can control the compressor frequency according to the indoor unit inlet temperature, outlet temperature and indoor ambient temperature, without the help of outdoor ambient temperature and compressor exhaust temperature. Therefore, the outdoor ambient temperature sensing package and the compressor exhaust temperature sensing package can be omitted, saving the wiring space of the outdoor unit, saving costs, and facilitating the miniaturization design of the outdoor unit.

[0067] In an optional implementation, referring to Figure 2 After the step of controlling the compressor frequency according to the temperature difference correction value, the control method further comprises the following steps:

[0068] S21, determining whether the indoor ambient temperature reaches the set temperature;

[0069] S22, when the indoor ambient temperature reaches the set temperature, controlling the compressor to stop;

[0070] S23. When the indoor ambient temperature does not reach the set temperature, determine the outdoor fan phase current, and determine whether to control the compressor to continue running according to the outdoor fan phase current.

[0071] In this embodiment, after the compressor frequency F is determined according to the temperature difference correction value, the compressor is controlled to operate at the determined frequency F. After the compressor operation state reaches a stable state, for example, after the compressor operates at the determined frequency F for t time, it is also necessary to determine whether the indoor ambient temperature T reaches the set temperature T 设 , if the indoor ambient temperature T reaches the set temperature T 设 , there is no need to adjust the indoor ambient temperature, and the compressor can be controlled to stop. 设 At this time, it is also necessary to monitor the external fan phase current, and then adjust the operating status of the compressor according to the external fan phase current to prevent the compressor frequency from failing to reach the target frequency due to overcurrent or undervoltage of the external fan, thereby effectively ensuring the reliability of the system.

[0072] In an optional implementation, determining whether to control the compressor to continue to run according to the outdoor fan phase current includes: determining the current correction value IDC according to the product of the outdoor fan phase current and the current correction coefficient 修正 , the current correction coefficient range is, for example, 1.1 to 1.2. 修正 When the current is within the target range, the phase current of the external fan is within the normal working range, and the compressor continues to run without causing damage to the external fan, so the compressor is controlled to continue running. 修正When the current is less than the minimum value of the target current range, or greater than or equal to the maximum value of the target current range, the external fan phase current has exceeded the upper and lower limits of the normal range, and the compressor must be shut down to prevent damage to the external fan and ensure system reliability.

[0073] In an optional implementation, in the step of controlling the compressor to continue to run, the current compressor frequency and current correction value IDC are also used. 修正 To determine whether to adjust the compressor frequency.

[0074] Specifically, according to the current compressor frequency and current correction value IDC 修正 To determine whether to adjust the compressor frequency, including:

[0075] When the current compressor frequency is ≤ the set frequency, the compressor frequency is low, and the compressor can still run at the original operating frequency to meet the indoor cooling demand, so the compressor is controlled to maintain the original frequency and continue to run.

[0076] When the current compressor frequency is greater than the set frequency and the minimum value of the target current range is less than or equal to the current correction value IDC 修正 <When the current value is set, the phase current is within the normal range and will not be too high. The external fan is safe and reliable. The compressor is controlled to maintain the original frequency operation, which can not only meet the indoor demand for cooling capacity, but also continue to operate at the original frequency for rapid cooling and improve user comfort.

[0077] When the compressor frequency is greater than the set frequency and the set current value is less than or equal to the current correction value IDC 修正 When the maximum value of the target current range is less than the maximum value, the phase current has risen. Although it is still within the safe range, in order to better protect the external fan from damage, the compressor frequency is controlled to be reduced and then continue to run to ensure system reliability.

[0078] Exemplarily, the set frequency is the minimum operating frequency of the compressor, and the minimum value of the target current range is I 相电流保护禁频 , the maximum value of the target current range is I 相电流停机保护 , set the current value to I 相电流保护降频 , I 相电流保护禁频 <I 相电流保护降频 <I 相电流停机保护 The target current range is 0 to 5A. When the current correction value IDC 修正 <I 相电流保护禁频 or IDC 修正 ≥I 相电流停机保护 , indicating that the phase current of the external fan has exceeded the normal working range, and the compressor must be shut down for protection. 修正 Reach I 相电流保护降频In order to better protect the external fan from damage, the compressor needs to run at a lower frequency to ensure reliable operation of the system.

[0079] After determining the compressor frequency based on the indoor unit inlet air temperature, outlet air temperature and indoor ambient temperature, the air conditioner of this embodiment further regulates the operating state and / or operating frequency of the compressor in combination with the phase current of the outdoor fan, to prevent the compressor frequency from failing to reach the target frequency due to overcurrent or undervoltage of the outdoor fan, thereby further ensuring system reliability while achieving the purposes of cooling and energy saving.

[0080] In the above-mentioned embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The steps shown in the relevant flow chart can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flow chart, in some cases, the steps shown or described can be executed in an order different from that here. In other words, the order of steps described in the foregoing embodiments is only an example, and it is also within the scope of protection of the embodiments of the present application to reasonably adjust the order of steps based on the content of the embodiments of the present application.

[0081] In a specific implementation of the embodiment of the present application, refer to Figure 3 The control method includes the following processing steps:

[0082] S31. Obtain the indoor unit inlet air temperature T 进 and outlet temperature T 出 , obtain the indoor ambient temperature T;

[0083] S32,

[0084] Calculate the indoor ambient temperature T and T respectively 进 and T 出 The absolute value of the difference ΔT 进 =|T 进 -T|,ΔT 出 =|T 出 -T|;

[0085] S33, calculate the temperature difference correction value ΔT 修 =K1×ΔT 进 +K2×ΔT 出 +K3;

[0086] S34,

[0087] ΔT 修 Compare with different set values, and determine the parking air conditioning compressor operating frequency F according to the comparison result;

[0088] S35: After the compressor runs at the operating frequency F for t time, it detects whether the indoor ambient temperature reaches the user-set temperature T. 设 If the indoor temperature has reached the user-set temperature T 设 , enter S36, if the user set temperature T is not reached 设 , enter S37;

[0089] S36, controlling the compressor to stop;

[0090] S37, detect the phase current IDC of the external fan at this time 风机相电流 , and calculate the correction value IDC of the phase current of the external fan 修正 =K 风机相电流修正系数 ×IDC 风机相电流 , and compare it with different set values; IDC 风机相电流 The value range is 0~5A;

[0091] S37. According to the above comparison result, the compressor operating frequency is determined again to ensure the reliability of the system.

[0092] Further, combined with Figure 4 Flow chart, ΔT 修 The specific implementation of the comparison with different set values ​​is as follows:

[0093] 1) When ΔT 修 <ΔT1, the indoor load is very small, and a large amount of cooling is not needed to maintain indoor comfort. The compressor is controlled to run at low gear (1st gear) frequency F1 for t1 time. If the indoor ambient temperature has reached T 设 , the compressor stops; if the indoor ambient temperature

[0094] Still not reaching T 设 , detect the phase current IDC of the external fan at this time 风机相电流 , and calculate the correction value IDC of the phase current of the external fan 修正 =K 风机相电流修正系数 ×

[0095] IDC 风机相电流 , if I 相电流保护禁频 ≤IDC 修正 <I 相电流停机保护 At this time, the phase currents are all within the normal range, and the compressor can still run at the original operating frequency to meet the indoor cooling demand until the indoor ambient temperature reaches T 设 After compressor

[0096] Shutdown; if IDC 修正 <I 相电流保护禁频 or IDC 修正 ≥I 相电流停机保护, at this time, the phase current has exceeded the upper and lower limits of the normal range, and the compressor must be shut down to prevent damage to the external fan to ensure system reliability;

[0097] 2) When ΔT1<ΔT 修 <ΔT2, at this time, the indoor load is low, in the medium and low range, the compressor operates at the medium frequency

[0098] The F2 (2nd gear) operating frequency can meet the indoor cooling demand. There is no need to run at a higher frequency to waste energy. The compressor is controlled to run at the middle gear frequency F2 for t2 time. If the indoor ambient temperature has reached T 设 , the compressor stops; if the indoor ambient temperature has not reached T 设 , detect the phase current IDC of the external fan at this time 风机相电流 , and calculate the correction value IDC of the phase current of the external fan 修正 =

[0099] K 风机相电流修正系数 ×

[0100] IDC 风机相电流 , if I 相电流保护禁频 ≤IDC 修正 <I 相电流保护降频 At this time, the phase current is within the normal range and will not be too high. The outdoor fan is safe and reliable, and the compressor still runs at the original operating frequency, which can not only meet the indoor demand for cooling capacity, but also continue to run at the mid-range frequency to achieve faster cooling and improve user comfort until the indoor ambient temperature reaches T 设 After compressor

[0101] Shutdown; if I 相电流保护降频 ≤IDC 修正 <I 相电流停机保护 At this time, the phase current has increased. Although it is still within the safe range, in order to better protect the outdoor fan from damage, the compressor operating frequency needs to be downgraded to operate reliably. The compressor operating frequency is downgraded to level 1 until the indoor temperature reaches T 设 After the compressor stops; if IDC 修正 <I phase 电流保护禁频 or IDC 修正 ≥I 相电流停机保护 , at this time, the phase current has exceeded the upper and lower limits of the normal range, and the compressor must be shut down to prevent damage to the external fan to ensure system reliability;

[0102] 3) When ΔT2≤ΔT 修 <ΔT3, the indoor load is high, in the medium-high range, the indoor demand for cooling is large, the first two operating frequencies can no longer meet the rapid cooling, then the compressor is controlled to run at the medium-high (3rd) frequency F3 for t3 time, if the indoor ambient temperature has reached T设 , the compressor stops; if the indoor ambient temperature has not reached T 设 , detect the phase current IDC of the external fan at this time 风机相电流 , and calculate the correction value IDC of the phase current of the external fan 修正 =K 风机相电流修正系数 ×

[0103] IDC 风机相电流 , if I 相电流保护禁频 ≤IDC 修正 <I 相电流保护降频 At this time, the phase current is within the normal range and will not be too high. The outdoor fan is safe and reliable, and the compressor still runs at the original operating frequency, which can not only meet the indoor demand for cooling capacity, but also continue to run at a medium or high frequency to achieve faster cooling and improve user comfort. This will continue until the indoor ambient temperature reaches T 设 After the compressor stops; if I 相电流保护降频 ≤IDC 修正 <I 相电流停机保护 At this time, the phase current has increased. Although it is still within the safe range, in order to better protect the outdoor fan from damage, the compressor operating frequency needs to be downgraded to operate reliably. The compressor operating frequency is downgraded to level 2 until the indoor temperature reaches T 设 After the compressor stops; if IDC 修正 <I 相电流保护禁频 or IDC 修正 ≥I 相电流停机保护 , at this time, the phase current has exceeded the upper and lower limits of the normal range, and the compressor must be shut down to prevent damage to the external fan to ensure system reliability;

[0104] 4) When ΔT 修 ≥ΔT3, the indoor load is very high, and the indoor demand for cooling is very large. The first three operating frequencies can no longer meet the rapid cooling requirements. The compressor is controlled to operate at the high frequency (4th gear) F4 for t4 time. If T 设 has been reached, the compressor stops; if T 设 It has not yet reached the target value, so the phase current IDC of the external fan is detected. 风机相电流 , and calculate the correction value IDC of the phase current of the external fan 修正 =K 风机相电流修正系数 ×

[0105] IDC 风机相电流 , if I 相电流保护禁频 ≤IDC 修正 <I 相电流保护降频At this time, the phase current is within the normal range and will not be too high. The outdoor fan is safe and reliable, and the compressor still runs at the original operating frequency, which can not only meet the indoor demand for cooling capacity, but also continue to run at a high frequency to achieve faster cooling and improve user comfort, until the indoor ambient temperature reaches T 设 After the compressor stops; if I 相电流保护降频 ≤IDC 修正 <I 相电流停机保护 At this time, the phase current has risen. Although it is still within the safe range, in order to better protect the outdoor fan from damage, the compressor operating frequency needs to be downgraded to be reliable. Because the high-speed F4 has been running for t4 time, the indoor load is no longer as high as at the beginning. The compressor operating frequency is downgraded to the 2nd gear, so that the system is reliable and the indoor temperature can reach T 设 After compressor

[0106] Shutdown; if IDC 修正 <I 相电流保护禁频 or IDC 修正 ≥I 相电流停机保护 At this time, the phase current has exceeded the upper and lower limits of the normal range, and the compressor must be shut down to prevent damage to the external fan to ensure system reliability.

[0107] An embodiment of the present application also provides a control device, which includes one or more processors and a non-temporary computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement the air conditioner control method proposed above.

[0108] Specifically, Figure 5 As shown, the control device includes a processor 100, at least one communication bus 200, a user interface 300, at least one external communication interface 400 and a memory 500. The communication bus 200 is configured to realize the connection and communication between these components. The user interface 300 may include a display screen, and the external communication interface 400 may include a standard wired interface and a wireless interface. The control method of the air conditioner is stored in the memory 500. The processor 100 is used to adopt the above method when executing the control method of the air conditioner stored in the memory 500.

[0109] The description of the control device is similar to the description of the method embodiment, and has similar beneficial effects as the method embodiment. For technical details not disclosed in the control device of the present application, please refer to the description of the method embodiment of the present application for understanding.

[0110] The embodiment of the present application also provides an air conditioner, which adopts the control method proposed above, or includes the control device proposed above.

[0111] An embodiment of the present application also provides a vehicle having the air conditioner as mentioned above.

[0112] The technical effects of the above-mentioned air conditioner and vehicle are similar to the technical effects obtained by the corresponding technical means in the control method, and will not be repeated here.

[0113] The sequence of serial numbers or introduction of the embodiments of the present application is for description only and does not represent the superiority or inferiority of the embodiments.

[0114] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0115] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0116] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0117] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access, or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital versatile disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)). It is worth noting that the computer-readable storage medium mentioned in the embodiment of the present application may be a non-volatile storage medium, in other words, a non-transient storage medium.

[0118] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) and signals involved in the embodiments of this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions. For example, the scene data of the current frame in the three-dimensional virtual scene, the device information of the client, and the scene interaction information involved in the embodiments of this application are all obtained with full authorization.

[0119] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for controlling an air conditioner, characterized in that: The control method comprises: Get the air inlet temperature and air outlet temperature of the indoor unit, and get the indoor ambient temperature; Determine a first temperature difference according to an absolute value of a difference between the inlet air temperature and the indoor ambient temperature, and determine a second temperature difference according to an absolute value of a difference between the outlet air temperature and the indoor ambient temperature; determining a temperature difference correction value according to the first temperature difference and the second temperature difference; The compressor frequency is controlled according to the temperature difference correction value.

2. The air conditioner control method according to claim 1, characterized in that: The determining the temperature difference correction value according to the first temperature difference and the second temperature difference includes: The temperature difference correction value is a function of the first temperature difference and the second temperature difference. The larger the first temperature difference is, the larger the temperature difference correction value is; and the larger the second temperature difference is, the larger the temperature difference correction value is. And / or, the temperature difference correction value, the first temperature difference and the second temperature difference satisfy the following formula: ΔT 修 =K1×ΔT 进 +K2×ΔT 出 +K3, where: ΔT 修 is the temperature difference correction value, ΔT 进 is the first temperature difference, ΔT 出 is the second temperature difference, and K1, K2, and K3 are all constants ranging from 0 to 1.

3. The air conditioner control method according to claim 1, characterized in that: The temperature difference correction value range to which the temperature difference correction value belongs has a preset corresponding relationship with the compressor frequency, and in the preset corresponding relationship, the temperature difference correction value range with a larger temperature difference correction value corresponds to a larger compressor frequency; Controlling the compressor frequency according to the temperature difference correction value includes: determining the compressor target frequency according to the preset corresponding relationship, and controlling the compressor to operate at the target frequency.

4. The air conditioner control method according to any one of claims 1 to 3, characterized in that: After the step of controlling the compressor frequency according to the temperature difference correction value, the control method further includes: Determine whether the indoor ambient temperature reaches the set temperature; When the indoor ambient temperature reaches the set temperature, the compressor is controlled to stop; When the indoor ambient temperature does not reach the set temperature, the outdoor fan phase current is determined, and whether to control the compressor to continue to run is determined according to the outdoor fan phase current.

5. The air conditioner control method according to claim 4, characterized in that: The determining whether to control the compressor to continue to run according to the outdoor fan phase current includes: Determine the current correction value according to the product of the outdoor fan phase current and the current correction coefficient; When the current correction value is within the target current range, controlling the compressor to continue running; When the current correction value is smaller than the minimum value of the target current range, or greater than or equal to the maximum value of the target current range, the compressor is controlled to stop.

6. The air conditioner control method according to claim 5, characterized in that: In the step of controlling the compressor to continue running, whether to adjust the compressor frequency is also determined based on the current compressor frequency and the current correction value.

7. The air conditioner control method according to claim 6, characterized in that: The step of determining whether to adjust the compressor frequency according to the current compressor frequency and the current correction value includes: When the current compressor frequency is less than or equal to the set frequency, the compressor is controlled to maintain the original frequency and continue to run; When the current compressor frequency is greater than the set frequency and the minimum value of the target current range is less than or equal to the current correction value and less than the set current value, the compressor is controlled to maintain the original frequency operation; When the compressor frequency is greater than the set frequency and the set current value is less than or equal to the current correction value and less than the maximum value of the target current range, the compressor frequency is controlled to be reduced and then continue to operate.

8. The air conditioner control method according to claim 5, characterized in that: The current correction coefficient has a value range of 1.1 to 1.2; And / or, the target current range is 0 to 5A.

9. A control device, characterized in that: It includes one or more processors and a non-transitory computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement the control method described in any one of claims 1 to 8.

10. An air conditioner, characterized in that: It adopts the control method described in any one of claims 1 to 8, or includes the control device described in claim 9.

11. A vehicle, characterized in that: The vehicle has the air conditioner according to claim 10.

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