Control method and device of air conditioning unit, air conditioning unit, equipment and medium

Abstract

The embodiment of the application provides a control method and device of an air conditioning unit, the air conditioning unit, equipment and medium, comprising: obtaining a set temperature value of an air conditioner and an initial running frequency of a compressor, detecting an indoor temperature value and an outdoor temperature value, determining a target running frequency according to the initial running frequency, the set temperature value and the outdoor temperature value, determining a sum of the set temperature value and a first preset difference value to obtain a target temperature upper limit value, and determining a difference between the set temperature value and the first preset difference value to obtain a target temperature lower limit value, comparing the indoor temperature value with the target temperature upper limit value and the target temperature lower limit value to obtain a comparison result, and performing refrigeration control on the air conditioning unit according to the comparison result, so that the energy-saving effect of the air conditioning unit is improved, and the indoor temperature can be stably controlled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to an air conditioning unit control method and device, an air conditioning unit, equipment and a medium. BACKGROUND

[0002] With the continuous progress of science and technology and the increasing demand for energy saving and environmental protection, the operation efficiency of air conditioning units is getting higher and higher, and the energy consumption is getting lower and lower.

[0003] In the related art, a variable frequency compressor is used to control the air conditioning unit, and the compressor speed is automatically adjusted to improve the energy efficiency of the air conditioner to a certain extent. However, since the optimal energy-saving frequency is different under different working conditions, it is difficult for the air conditioning unit to maintain stable indoor temperature and high energy-saving operation. SUMMARY

[0004] In view of the above problems, an air conditioning unit control method and device, an air conditioning unit, equipment and a medium are provided to overcome the above problems or at least partially solve the above problems, comprising:

[0005] An air conditioning unit control method, the method comprising:

[0006] obtaining a set temperature value of an air conditioner and an initial operating frequency of a compressor;

[0007] detecting an indoor temperature value and an outdoor temperature value;

[0008] determining a target operating frequency according to the initial operating frequency, the set temperature value and the outdoor temperature value;

[0009] determining the sum of the set temperature value and a first preset difference value to obtain a target temperature upper limit value, and determining the difference between the set temperature value and the first preset difference value to obtain a target temperature lower limit value;

[0010] comparing the indoor temperature value with the target temperature upper limit value and the target temperature lower limit value to obtain a comparison result;

[0011] controlling the air conditioning unit according to the comparison result, comprising:

[0012] if the indoor temperature value is greater than the target temperature upper limit value, obtaining a preset upper limit frequency value and a preset lower limit frequency value of the compressor, and controlling the air conditioning unit according to the preset upper limit frequency value and the preset lower limit frequency value;

[0013] if the indoor temperature value is greater than or equal to the target temperature lower limit value and less than or equal to the target temperature upper limit value, controlling the air conditioning unit according to the target operating frequency;

[0014] If the indoor temperature value is less than the target temperature lower limit value, the air conditioning unit is controlled to standby.

[0015] Optionally, the method further comprises:

[0016] In the process of controlling the air conditioning unit to refrigerate according to the comparison result, a temperature value of a copper pipe in an evaporator and an evaporating temperature value of the evaporator are detected;

[0017] If the temperature value of the copper pipe is less than or equal to a preset defrosting mode entering temperature value, and a difference between the indoor temperature value and the evaporating temperature value is greater than or equal to a second preset difference value, the control of the air conditioning unit to refrigerate is stopped, and the air conditioning unit is controlled to defrost.

[0018] Optionally, the controlling the air conditioning unit according to the target operating frequency comprises:

[0019] A frequency upper deviation value and a frequency lower deviation value corresponding to the target operating frequency are obtained;

[0020] A sum of the target operating frequency and the frequency upper deviation value is determined to obtain a target frequency upper limit value, and a difference between the target operating frequency and the frequency lower deviation value is determined to obtain a target frequency lower limit value;

[0021] The air conditioning unit is controlled according to the target frequency upper limit value and the target frequency lower limit value.

[0022] Optionally, the method further comprises:

[0023] In the process of controlling the air conditioning unit to defrost, the temperature value of the copper pipe is detected;

[0024] A length of the defrosting control is obtained, and if the temperature value of the copper pipe is greater than a preset defrosting mode exiting temperature value, and / or the length of the defrosting control is greater than or equal to a preset length, the control of the air conditioning unit to defrost is stopped.

[0025] Optionally, the determining the target operating frequency according to the initial operating frequency, the set temperature value and the outdoor temperature value comprises:

[0026] A first proportional coefficient corresponding to the outdoor temperature value and a second proportional coefficient corresponding to the set temperature value are obtained;

[0027] A first product of the outdoor temperature value and the first proportional coefficient and a second product of the set temperature value and the second proportional coefficient are determined;

[0028] A sum of the first product and the second product is determined to obtain a target sum;

[0029] The difference between the initial operation frequency and the sum of the target temperature upper limit value and the target temperature lower limit value is determined as the target operation frequency.

[0030] Optionally, the controlling the air conditioning unit according to the preset upper limit value and the preset lower limit value comprises:

[0031] The operation frequency of the compressor is proportionally-integrally-differentiately closed-loop regulated within a second frequency range composed of the preset upper limit value and the preset lower limit value.

[0032] Optionally, the controlling the air conditioning unit according to the preset upper limit value and the preset lower limit value comprises:

[0033] The operation frequency of the compressor is proportionally-integrally-differentiately closed-loop regulated within a second frequency range composed of the preset upper limit value and the preset lower limit value.

[0034] Optionally, the controlling the air conditioning unit standby comprises:

[0035] The compressor is controlled to be turned off, the fan in the evaporator is controlled to be turned off, and the fan in the condenser is controlled to be turned off with a time delay.

[0036] A control device of an air conditioning unit, the device comprising:

[0037] An initial parameter acquisition module is configured to acquire a set temperature value of an air conditioner and an initial operation frequency of a compressor.

[0038] A temperature detection module is configured to detect an indoor temperature value and an outdoor temperature value.

[0039] A target operation frequency determination module is configured to determine a target operation frequency according to the initial operation frequency and the outdoor temperature value.

[0040] A target temperature upper and lower limit determination module is configured to determine a sum of the set temperature value and a first preset difference value to obtain a target temperature upper limit value, and determine a difference between the set temperature value and the first preset difference value to obtain a target temperature lower limit value.

[0041] A comparison module is configured to compare the indoor temperature value with the target temperature upper limit value and the target temperature lower limit value to obtain a comparison result.

[0042] A refrigeration control module is configured to control the air conditioning unit to perform refrigeration according to the comparison result, comprising:

[0043] If the indoor temperature value is greater than the target temperature upper limit value, a preset upper limit value and a preset lower limit value of the operation frequency of the compressor are acquired, and the air conditioning unit is controlled according to the preset upper limit value and the preset lower limit value.

[0044] if the indoor temperature value is greater than or equal to the lower limit value of the target temperature and less than or equal to the upper limit value of the target temperature, controlling the air conditioning unit according to the target operating frequency;

[0045] if the indoor temperature value is less than the lower limit value of the target temperature, controlling the air conditioning unit to standby.

[0046] An air conditioning unit comprising the control device of the air conditioning unit as described above.

[0047] An electronic device comprising a processor, a memory, and a computer program stored on the memory and capable of running on the processor, the computer program being executed by the processor to implement the control method of the air conditioning unit as described above.

[0048] A computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the control method of the air conditioning unit as described above.

[0049] The embodiment of the present application has the following advantages: by obtaining a set temperature value of an air conditioner and an initial operating frequency of a compressor, detecting an indoor temperature value and an outdoor temperature value, determining a target operating frequency according to the initial operating frequency, the set temperature value, and the outdoor temperature value, determining a sum of the set temperature value and a first preset difference to obtain an upper limit value of the target temperature, and determining a difference between the set temperature value and the first preset difference to obtain a lower limit value of the target temperature, comparing the indoor temperature value with the upper limit value of the target temperature and the lower limit value of the target temperature to obtain a comparison result, and controlling the air conditioning unit according to the comparison result, including: if the indoor temperature value is greater than the upper limit value of the target temperature, obtaining a preset upper limit value of the frequency and a preset lower limit value of the frequency of the compressor, and controlling the air conditioning unit according to the preset upper limit value of the frequency and the preset lower limit value of the frequency, if the indoor temperature value is greater than or equal to the lower limit value of the target temperature and less than or equal to the upper limit value of the target temperature, controlling the air conditioning unit according to the target operating frequency, and if the indoor temperature value is less than the lower limit value of the target temperature, controlling the air conditioning unit to standby, the embodiment realizes control of the air conditioning unit in an optimal compressor operating frequency range, improves energy saving effect, and maintains stable control of indoor temperature. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the description of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor.

[0051] Figure 1is a step flow chart of a control method of an air conditioning unit provided by an embodiment of the present application;

[0052] Figure 2 is a structural schematic diagram of an air conditioning unit provided by an embodiment of the present application;

[0053] Figure 3 is an implementation process diagram of refrigeration control provided by an embodiment of the present application;

[0054] Figure 4 is an implementation process diagram of defrosting control provided by an embodiment of the present application;

[0055] Figure 5 is a structural block diagram of a control device of an air conditioning unit provided by an embodiment of the present application. DETAILED DESCRIPTION

[0056] In order to make the above objectives, characteristics and advantages of the present application more apparent, comprehensible and easier to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0057] Referring to Figure 1 , a step flow chart of a control method of an air conditioning unit provided by an embodiment of the present application is shown, which can specifically include the following steps:

[0058] Step 101, obtaining a set temperature value of an air conditioner and an initial running frequency of a compressor;

[0059] The set temperature value refers to an expected indoor temperature set by a user through an air conditioner control panel or a remote controller. The air conditioner system will adjust the refrigeration or heating capacity according to the set value, so as to make the indoor temperature as close as possible to the set temperature value.

[0060] The initial running frequency refers to an initial reference value required for dynamic adjustment of the running frequency of the compressor.

[0061] Step 102, detecting an indoor temperature value and an outdoor temperature value;

[0062] The indoor temperature value is a temperature detection value of an indoor environment acted on by the air conditioner; the outdoor temperature value refers to a temperature detection value of an outdoor environment relative to the indoor environment. Exemplarily, the compressor of the air conditioning unit is placed outdoors, so that the outdoor temperature value can be collected through the temperature sensor of the compressor. During the running process of the air conditioning unit, the indoor temperature value and the outdoor temperature value can be continuously detected.

[0063] In some examples, the partial structure of the air conditioning unit is as shown in Figure 2 including a compressor 1, a condenser 2, an electronic expansion valve 3, an evaporator 4, a vapor-liquid separator 5, and a controller 6.

[0064] An indoor temperature sensor is installed on the return air side of the evaporator 4 to detect the indoor temperature value (T in ). A temperature sensor is installed on the return air side of the condenser 2 to detect the outdoor temperature value (T out ). In addition, suction temperature sensor, discharge temperature sensor, suction pressure sensor, etc. are installed on the unit, and suction temperature T 吸气 , discharge temperature T 排气 , suction pressure P 吸气 , etc. can also be detected.

[0065] Step 103, determining a target operating frequency according to the initial operating frequency and the outdoor temperature value.

[0066] The target operating frequency is the optimal frequency of the compressor that can take into account energy saving and operating efficiency.

[0067] In some embodiments of the present application, step 103 comprises:

[0068] Obtaining a first proportional coefficient corresponding to the outdoor temperature value, and a second proportional coefficient corresponding to the set temperature value;

[0069] Determining a first product of the outdoor temperature value and the first proportional coefficient, and a second product of the set temperature value and the second proportional coefficient;

[0070] Determining the sum of the first product and the second product to obtain a target sum;

[0071] Determining the difference between the initial operating frequency and the target sum as the target operating frequency.

[0072] For example, let the initial operating frequency be F(y0), the outdoor temperature value be T out , the set temperature value be T m , the first proportional coefficient be K1, and the second proportional coefficient be K2. The target operating frequency F(zy) can be expressed as follows:

[0073] F(zy) = F(y0) - K1*T out + K2*T m

[0074] In practical applications, the first proportional coefficient and the second proportional coefficient can be determined according to the actual needs, for example, by calibrating experimental data.

[0075] Step 104, determining the sum of the set temperature value and the first preset difference value to obtain a target temperature upper limit value, and determining the difference between the set temperature value and the first preset difference value to obtain a target temperature lower limit value;

[0076] In step 104, the first preset difference value, that is, the preset threshold of the difference between the indoor temperature value and the set temperature value, represents the requirement for the control accuracy of the air conditioning unit. The higher the control accuracy requirement, the smaller the difference between the indoor temperature value and the set temperature value.

[0077] The range composed of the target temperature upper limit value and the target temperature lower limit value is used to judge different control modes of the compressor.

[0078] For example, assuming that the set temperature value is T m , the first preset difference value is △T k , the target temperature upper limit value is T m +△T k , and the target temperature lower limit value is T m -△T k .

[0079] Step 105, comparing the indoor temperature value with the target temperature upper limit value and the target temperature lower limit value to obtain a comparison result;

[0080] Step 106, performing refrigeration control on the air conditioning unit according to the comparison result, including:

[0081] Step 107, if the indoor temperature value is greater than the target temperature upper limit value, obtaining a preset upper limit frequency value and a preset lower limit frequency value of the compressor, and controlling the air conditioning unit according to the preset upper limit frequency value and the preset lower limit frequency value.

[0082] In step 107, if the indoor temperature value is greater than the target temperature upper limit value, the air conditioning unit needs to be controlled to enter the refrigeration mode for control, and at this time, the preset upper limit frequency value and the preset lower limit frequency value are obtained. The preset upper limit frequency value can be the maximum operating frequency value of the compressor during operation, and the preset lower limit frequency value can be the minimum operating frequency value of the compressor, which can be set by the compressor manufacturer when designing or shipping the compressor, or can be determined according to actual conditions.

[0083] Then, the operating frequency of the compressor during actual operation is adjusted within the range composed of the preset upper limit frequency value and the preset lower limit frequency value, so that the indoor temperature decreases and approaches the set temperature value as much as possible.

[0084] For example, assuming that the preset upper limit frequency value is F(h), the preset lower limit frequency value is F(1), and the operating frequency of the compressor is F(n), the adjustment range of the operating frequency of the compressor is F(1)≤F(n)≤F(h).

[0085] In some embodiments of the present application, the control of the air conditioning unit according to the preset upper limit value and the preset lower limit value of the frequency comprises:

[0086] In the second frequency range composed of the preset upper limit value and the preset lower limit value of the frequency, the operating frequency of the compressor is proportionally, integrally and differentially closed-loop regulated.

[0087] The proportionally, integrally and differentially closed-loop regulation, namely PID (Proportional-Integral-Derivative) regulation, works by continuously calculating error values (i.e. the difference between the set value and the actual value) and adjusting the control output according to the size of the error, the cumulative error and the error rate of change, so as to stabilize the system around the set value.

[0088] In some examples, the indoor temperature value and the set temperature value can be detected at different time periods, and the operating frequency of the compressor is PID closed-loop regulated according to the difference between the detected indoor temperature value and the set temperature value, and the frequency difference value that needs to be adjusted ΔF(n) can be obtained by the following formula:

[0089] ΔF(n) = K p *(ΔT n -ΔT n-1 )+K i *ΔT n +K d *(ΔT n -2ΔT n-1 +ΔT n-2 )

[0090] Wherein, K p is the proportional coefficient of the frequency of the compressor, K i is the differential proportional coefficient of the frequency of the compressor, and K d is the integral proportional coefficient of the frequency of the compressor; ΔTn is the difference between the detected indoor temperature value and the set temperature value at the current nth time period, ΔT n-1 is the difference between the detected indoor temperature value and the set temperature value at the n-1th, i.e. the last time period, and ΔT n-2 is the difference between the detected indoor temperature value and the set temperature value at the n-2th time period.

[0091] In the process of PID closed-loop regulation of the operating frequency of the compressor, the operating frequency F(n) of the compressor must not be greater than the preset upper limit value of the frequency, nor less than the preset lower limit value of the frequency, i.e. F(1) ≤ F(n) ≤ F(h). When the calculation result of the PID exceeds the range, the corresponding preset upper limit value or preset lower limit value of the frequency is used to control the operating frequency of the compressor.

[0092] If the indoor temperature value is greater than or equal to the lower limit of the target temperature and less than or equal to the upper limit of the target temperature, the air conditioning unit is controlled according to the target operating frequency.

[0093] In step 108, if the indoor temperature value is greater than or equal to the lower limit of the target temperature and less than or equal to the upper limit of the target temperature, it means that the control of the air conditioning unit on the temperature is within the range of control accuracy requirements, and the air conditioner can be controlled by the target operating frequency for energy-saving control, so that the air conditioning unit operates at a lower energy consumption while maintaining stable indoor temperature.

[0094] In some embodiments of the present application, the controlling the air conditioning unit according to the target operating frequency comprises:

[0095] obtaining a frequency upper deviation value and a frequency lower deviation value corresponding to the target operating frequency;

[0096] determining the sum of the target operating frequency and the frequency upper deviation value to obtain a target frequency upper limit value, and determining the difference between the target operating frequency and the frequency lower deviation value to obtain a target frequency lower limit value;

[0097] controlling the air conditioning unit according to the target frequency upper limit value and the target frequency lower limit value.

[0098] In this embodiment, the frequency upper deviation value is the upper limit deviation value of the target operating frequency, and the frequency lower deviation value is the lower limit deviation value of the target operating frequency. The frequency upper deviation value and the frequency lower deviation value are used to provide redundancy for the control of the operating frequency of the compressor. The range composed of the target frequency upper limit value and the target frequency lower limit value is the range for adjusting the operating frequency of the compressor.

[0099] In specific implementation, the operating frequency of the compressor during actual operation can be adjusted within the range composed of the target frequency upper limit value and the target frequency lower limit value, so that the operating frequency of the compressor is maintained at the optimal frequency as much as possible, which takes into account temperature regulation and energy-saving effect.

[0100] In some examples, let the frequency lower deviation value be C1, the frequency upper deviation value be C2, and the target operating frequency be F(zy). The target frequency upper limit value is F(zy)+C2, the target frequency lower limit value is F(zy)-C1, and the adjustment range of the operating frequency F(n) of the compressor is: F(zy)-C1≤F(n)≤F(zy)+C2.

[0101] In some embodiments of the present application, the controlling the air conditioning unit according to the target frequency upper limit value and the target frequency lower limit value comprises:

[0102] The running frequency of the compressor is proportionally-integrally-differentiately closed-loop regulated in the first frequency range composed of the target frequency lower limit value and the target frequency upper limit value.

[0103] In some examples, the indoor temperature value and the set temperature value are detected in different time periods, and the running frequency of the compressor is PID closed-loop regulated according to the difference between the detected indoor temperature value and the set temperature value, and the frequency difference value that needs to be adjusted ΔF(n) can be obtained by the following formula:

[0104] ΔF(n)=Kp*(ΔTn-ΔTn-1)+Ki*ΔTn+Kd*(ΔTn-2ΔTn-1+ΔTn-2)

[0105] Wherein, Kp is the compressor frequency proportional coefficient, Ki is the compressor frequency differential proportional coefficient, Kd is the compressor frequency integral proportional coefficient; ΔTn is the difference between the detected indoor temperature value and the set temperature value in the current nth time period, ΔTn-1 is the difference between the detected indoor temperature value and the set temperature value in the (n-1)th, i.e. the last time period, and ΔTn-2 is the difference between the detected indoor temperature value and the set temperature value in the (n-2)th time period.

[0106] In the process of PID closed-loop regulating the running frequency of the compressor, the running frequency F(n) of the compressor must not be greater than the target frequency upper limit value, nor less than the target frequency lower limit value, i.e. F(zy)-C1≤F(n)≤F(zy)+C2. When the calculation result of the PID exceeds the range, the corresponding target frequency upper limit value or target frequency lower limit value is used to control the running frequency of the compressor.

[0107] Step 109, if the indoor temperature value is less than the target temperature lower limit value, the air conditioning unit is controlled to be in standby.

[0108] In step 109, if the indoor temperature value is less than the target temperature lower limit value, it means that the air conditioning unit does not need to perform refrigeration at this time, and the air conditioning unit is controlled to enter the standby state.

[0109] In some embodiments of the present application, the control of the air conditioning unit in standby includes:

[0110] The compressor is controlled to be turned off, the fan in the evaporator is controlled to be turned off, and the fan in the condenser is controlled to be turned off with a time delay.

[0111] In this embodiment, when the air conditioning unit is in standby mode, by controlling the compressor to shut down, the fan in the evaporator to shut down, and the fan in the condenser to shut down after a delay, the air conditioning unit can stop the function of some equipment while remaining powered on, thus avoiding unnecessary energy consumption. The delayed shutdown of the fan in the condenser can prevent problems such as condensate buildup and corrosion inside the condenser. The specific delay time can be determined according to actual needs, such as 10 seconds or 15 seconds.

[0112] In practical applications, when controlling the air conditioning unit to be in standby mode, the electronic expansion valve between the condenser and evaporator, and the solenoid valve controlling the flow of refrigerant can also be closed.

[0113] In some examples, such as Figure 3 As shown, a diagram illustrating the implementation process of refrigeration control for the air conditioning unit is also provided, as detailed below:

[0114] When the cooling mechanism (i.e., the air conditioning unit) is powered on, the outdoor temperature value T is monitored in real time. out Indoor temperature T in The operating frequency F(n) of the compressor;

[0115] Determine the target operating frequency of the compressor, i.e., the optimal operating frequency F(zy);

[0116] For indoor temperature value T in Set temperature value T m Make judgments and comparisons:

[0117] If Tin > TM + △Tk, control the air conditioning unit to enter the cooling mode, and perform PID closed-loop regulation on the compressor's operating frequency F(n) within the range of F(1) ≤ F(n) ≤ F(h);

[0118] If T m -△T k ≤T in ≤T M +△T k The air conditioning unit is controlled to enter node mode, and the operating frequency F(n) of the compressor is adjusted by PID closed loop within the range of F(zy)-C1≤F(n)≤F(zy)+C2;

[0119] If T in <T m -△T k This controls the air conditioning unit to enter standby mode.

[0120] In some embodiments of the present invention, the method further includes:

[0121] In the process of performing refrigeration control on the air conditioning unit according to the comparison result, the temperature value of the copper pipe in the evaporator and the evaporation temperature value of the evaporator are detected;

[0122] If the temperature value of the copper pipe is less than or equal to the preset entering defrosting mode temperature value, and the difference between the indoor temperature value and the evaporation temperature value is greater than or equal to a second preset difference value, the refrigeration control on the air conditioning unit is stopped, and the defrosting control on the air conditioning unit is performed.

[0123] In the present embodiment, since the surface temperature of the evaporator is too low during the refrigeration of the air conditioning unit, the moisture in the air may condense into frost or ice on the surface of the evaporator, at which time the defrosting control is needed to exit the refrigeration mode and enter the defrosting mode. In the defrosting mode, the air conditioning system can heat the surface of the evaporator by an electric heater or hot gas bypass to remove the frost or ice on the surface of the evaporator, so as to ensure the normal operation of the system.

[0124] The entering defrosting mode temperature value is a judgment temperature value for entering the defrosting mode.

[0125] The evaporation temperature value is the temperature value of the refrigerant when changing from a liquid state to a gaseous state in the evaporator.

[0126] The second preset difference value is the allowable difference value between the indoor temperature value and the outdoor temperature value. Exemplarily, corresponding second preset difference values can be set in different operating modes, different adjustment ranges of the operating frequency of the compressor, and different outdoor temperatures.

[0127] When the temperature value of the copper pipe is less than or equal to the entering defrosting mode temperature value, and the difference between the indoor temperature value and the evaporation temperature value is greater than or equal to the second preset difference value, it means that the surface of the evaporator may have been frosted, and the defrosting control is needed.

[0128] In some examples, a timer is also added to determine whether to enter the defrosting mode. For example, a countdown is set when the air conditioning unit is turned on, which can also be referred to as a defrosting remaining time. When it is detected that the temperature value of the copper pipe is less than or equal to the preset entering defrosting mode temperature value, if the countdown is 0, the difference between the indoor temperature value and the evaporation temperature value is further detected; if the countdown is not 0, the defrosting mode is not needed to be entered, and the subsequent detection of the difference between the indoor temperature value and the evaporation temperature value is not performed.

[0129] In actual application, if the temperature value of the copper pipe is less than or equal to the entering defrosting mode temperature value, but the difference between the indoor temperature value and the evaporation temperature value is less than the second preset difference value, the original operating state of the air conditioning unit, such as the refrigeration mode, the energy saving mode, the standby mode, etc., can be maintained.

[0130] In some embodiments of the present application, the method further comprises:

[0131] In the process of defrosting control of the air conditioning unit, the temperature value of the copper pipe is detected;

[0132] The duration of defrosting control is obtained, and if the temperature value of the copper pipe is greater than a preset defrost mode exit temperature value, and / or the duration of defrosting control is greater than or equal to a preset duration, the defrosting control of the air conditioning unit is stopped.

[0133] In this embodiment, the defrost mode exit temperature value is the determination temperature value for exiting the defrost mode. In the process of defrosting control of the air conditioning unit, the temperature value of the copper pipe is detected. If the temperature value of the copper pipe is greater than the temperature value of the defrost mode, it indicates that the frost on the surface of the evaporator has been removed at this time, and the defrost mode can be exited, and the air conditioning unit returns to its original state, such as the refrigeration mode, the energy saving mode, the standby mode, etc.

[0134] At the same time, in order to avoid damage caused by long time heating of the evaporator, when the duration of defrosting control is greater than or equal to a preset duration, the defrosting control is also exited.

[0135] In some examples, as Figure 4 shown, a process diagram of defrosting control of the air conditioning unit is also provided, which is as follows:

[0136] When the refrigeration unit is in the power-on state, the unit detects the indoor temperature value Tin, the evaporator temperature T 蒸发 , the defrosting temperature (i.e. the real-time temperature of the copper pipe in the evaporator) T 化霜 , the compressor operating frequency F(n), and the defrosting remaining time (i.e. the countdown time for entering the defrosting mode) t 化霜余时 .

[0137] When T 化霜 ≤ T 化霜进入温度 and t 化霜余时 = 0, whether the difference AT1 between Tin and T 化霜 is greater than the set difference AT0 between the different frequency sections, the different environment temperatures and the target evaporator temperature is detected to determine whether the unit enters defrosting.

[0138] If AT1 < AT0, the unit remains in the original state and operates;

[0139] If AT1 ≥ AT0, the defrosting mode is entered. When T 化霜 > T 化霜退出温度 or the defrosting time is greater than the set maximum defrosting duration t 化霜时长max , the unit exits the defrosting mode.

[0140] The embodiment of the present application has the following advantages: by acquiring a set temperature value of an air conditioner and an initial running frequency of a compressor, detecting an indoor temperature value and an outdoor temperature value, determining a target running frequency according to the initial running frequency, the set temperature value and the outdoor temperature value, determining a sum of the set temperature value and a first preset difference to obtain a target temperature upper limit value, and determining a difference between the set temperature value and the first preset difference to obtain a target temperature lower limit value, comparing the indoor temperature value with the target temperature upper limit value and the target temperature lower limit value to obtain a comparison result, and controlling the air conditioning unit according to the comparison result, including: if the indoor temperature value is greater than the target temperature upper limit value, acquiring a preset frequency upper limit value and a preset frequency lower limit value of the compressor and controlling the air conditioning unit according to the preset frequency upper limit value and the preset frequency lower limit value, if the indoor temperature value is greater than or equal to the target temperature lower limit value and less than or equal to the target temperature upper limit value, controlling the air conditioning unit according to the target running frequency, and if the indoor temperature value is less than the target temperature lower limit value, controlling the air conditioning unit to standby, the air conditioning unit is controlled in an optimal compressor running frequency range, the energy saving effect is improved, and the indoor temperature is stably controlled.

[0141] It should be noted that, for the method embodiments, in order to simply describe, they are all described as a series of action combinations, but those skilled in the art should know that the embodiment of the present application is not limited to the action sequence described, because according to the embodiment of the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions involved are not necessarily the necessary of the embodiment of the present application.

[0142] Referring to Figure 5 , a structure schematic diagram of a control device of an air conditioning unit provided by an embodiment of the present application is shown, which can specifically include the following modules:

[0143] The initial parameter acquisition module 501 is used to acquire a set temperature value of an air conditioner and an initial running frequency of a compressor.

[0144] The temperature detection module 502 is used to detect an indoor temperature value and an outdoor temperature value.

[0145] The target running frequency determination module 503 is used to determine a target running frequency according to the initial running frequency and the outdoor temperature value.

[0146] The target temperature upper and lower limit determination module 504 is used to determine a sum of the set temperature value and a first preset difference to obtain a target temperature upper limit value, and determine a difference between the set temperature value and the first preset difference to obtain a target temperature lower limit value.

[0147] The comparison module 505 is configured to compare the indoor temperature value with the target temperature upper limit value and the target temperature lower limit value to obtain a comparison result.

[0148] The refrigeration control module 506 is configured to perform refrigeration control on the air conditioning unit according to the comparison result, including:

[0149] If the indoor temperature value is greater than the target temperature upper limit value, preset upper limit and lower limit values of the frequency of the compressor are obtained, and the air conditioning unit is controlled according to the preset upper limit and lower limit values of the frequency.

[0150] If the indoor temperature value is greater than or equal to the target temperature lower limit value and less than or equal to the target temperature upper limit value, the air conditioning unit is controlled according to the target operating frequency.

[0151] If the indoor temperature value is less than the target temperature lower limit value, the air conditioning unit is controlled to be in standby mode.

[0152] In some embodiments of the present application, the device further comprises:

[0153] The defrosting temperature detection module is configured to detect a temperature value of a copper pipe in an evaporator and an evaporation temperature value of the evaporator during the refrigeration control on the air conditioning unit according to the comparison result.

[0154] The defrosting control module is configured to stop the refrigeration control on the air conditioning unit and perform defrosting control on the air conditioning unit if the temperature value of the copper pipe is less than or equal to a preset entering defrosting mode temperature value and a difference between the indoor temperature value and the evaporation temperature value is greater than or equal to a second preset difference value.

[0155] In some embodiments of the present application, the refrigeration control module 506 comprises:

[0156] The frequency deviation value obtaining sub-module is configured to obtain a frequency upper deviation value and a frequency lower deviation value corresponding to the target operating frequency.

[0157] The target frequency upper and lower limit value determining sub-module is configured to determine a sum of the target operating frequency and the frequency upper deviation value to obtain a target frequency upper limit value, and determine a difference between the target operating frequency and the frequency lower deviation value to obtain a target frequency lower limit value.

[0158] The first control sub-module is configured to control the air conditioning unit according to the target frequency upper limit value and the target frequency lower limit value.

[0159] In some embodiments of the present application, the device further comprises:

[0160] The defrosting exit temperature detection module is configured to detect the temperature value of the copper pipe during defrosting control of the air conditioning unit.

[0161] The defrosting stop control module is configured to obtain a duration of the defrosting control, and stop the defrosting control of the air conditioning unit if the temperature value of the copper pipe is greater than a preset defrosting mode exit temperature value and / or the duration of the defrosting control is greater than or equal to a preset duration.

[0162] In some embodiments of the present application, the target operating frequency determination module 503 comprises:

[0163] The proportional coefficient obtaining sub-module is configured to obtain a first proportional coefficient corresponding to the outdoor temperature value and a second proportional coefficient corresponding to the set temperature value.

[0164] The product determination sub-module is configured to determine a first product of the outdoor temperature value and the first proportional coefficient and a second product of the set temperature value and the second proportional coefficient.

[0165] The target sum determination sub-module is configured to determine a sum of the first product and the second product as a target sum.

[0166] The target operating frequency determination sub-module is configured to determine a difference between the initial operating frequency and the target sum as the target operating frequency.

[0167] In some embodiments of the present application, the refrigeration control module 506 comprises:

[0168] The second control sub-module is configured to perform proportional-integral-derivative closed-loop adjustment on the operating frequency of the compressor within a first frequency range composed of the target frequency lower limit value and the target frequency upper limit value.

[0169] In some embodiments of the present application, the refrigeration control module 506 comprises:

[0170] The third control sub-module is configured to perform proportional-integral-derivative closed-loop adjustment on the operating frequency of the compressor within a second frequency range composed of the preset frequency lower limit value and the preset frequency upper limit value.

[0171] In some embodiments of the present application, the refrigeration control module 506 comprises:

[0172] The device shutdown control sub-module is configured to control the compressor to be shut down, the fan in the evaporator to be shut down, and the fan in the condenser to be delayed to be shut down.

[0173] Some embodiments of the present application also provide an air conditioning unit comprising the control device of the air conditioning unit as described above.

[0174] Some embodiments of the present application further provide an electronic device, which can include a processor, a memory, and a computer program stored on the memory and capable of running on the processor, and the computer program is executed by the processor to implement the control method of the air conditioning unit.

[0175] Some embodiments of the present application further provide a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the control method of the air conditioning unit.

[0176] Some embodiments of the present application further provide a computer program product, which includes a computer program, and the computer program is executed by a processor to implement the control method of the air conditioning unit.

[0177] For the device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts are referred to the part of the method embodiments.

[0178] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of the relevant data need to comply with the relevant laws, regulations and standards of the country and region, and provide corresponding operation portal for the user to choose authorization or refusal.

[0179] Each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between the embodiments can be referred to each other.

[0180] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, device, or computer program product. Therefore, the embodiments of the present application can be in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present application can be in the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

[0181] The embodiments of the present application are described with reference to the flowchart illustrations and / or block diagrams of the methods, terminal devices (systems) and computer program products according to the embodiments of the present application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal devices to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal devices, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams.

[0182] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal devices to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams.

[0183] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal devices, such that a series of operational steps are carried out on the computer or other programmable terminal devices to produce a computer implemented process so that the instructions executed on the computer or other programmable terminal devices provide steps for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in the flowchart illustrations and / or block diagrams.

[0184] Although preferred embodiments of the present application have been described, those skilled in the art will be able to make additional modifications and variations to these embodiments without departing from the scope of the present application. Accordingly, the appended claims are intended to encompass all such modifications and variations as falling within the scope of the present application.

[0185] Finally, it needs to be pointed out that in this document, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying that there is any such actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover non-exclusive inclusions, so that a process, method, article, or terminal device including a list of elements does not only include those elements, but also includes other elements not explicitly listed, or further includes elements inherent in such a process, method, article, or terminal device. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article, or terminal device including the above element.

[0186] The control method and device of the air conditioning unit, the air conditioning unit, the equipment, and the medium provided above are described in detail. The principles and implementation manners of the present application are described by applying specific examples in this document. The above example is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A control method of an air conditioning unit, characterized by, The method comprises: obtaining a set temperature value of an air conditioner and an initial running frequency of a compressor; detecting an indoor temperature value and an outdoor temperature value; determining a target running frequency according to the initial running frequency, the set temperature value and the outdoor temperature value; determining a sum of the set temperature value and a first preset difference value to obtain a target temperature upper limit value, and determining a difference between the set temperature value and the first preset difference value to obtain a target temperature lower limit value; comparing the indoor temperature value with the target temperature upper limit value and the target temperature lower limit value to obtain a comparison result; controlling the air conditioning unit according to the comparison result, comprising: if the indoor temperature value is greater than the target temperature upper limit value, obtaining a preset upper limit frequency value and a preset lower limit frequency value of the compressor, and controlling the air conditioning unit according to the preset upper limit frequency value and the preset lower limit frequency value; if the indoor temperature value is greater than or equal to the target temperature lower limit value and less than or equal to the target temperature upper limit value, controlling the air conditioning unit according to the target running frequency; if the indoor temperature value is less than the target temperature lower limit value, controlling the air conditioning unit to standby; the controlling the air conditioning unit according to the target running frequency comprises: obtaining a frequency upper deviation value and a frequency lower deviation value corresponding to the target running frequency; determining a sum of the target running frequency and the frequency upper deviation value to obtain a target upper limit frequency value, and determining a difference between the target running frequency and the frequency lower deviation value to obtain a target lower limit frequency value; controlling the air conditioning unit according to the target upper limit frequency value and the target lower limit frequency value.

2. The method of claim 1, wherein, The method further comprises: during the process of controlling the air conditioning unit according to the comparison result, detecting a temperature value of a copper pipe in an evaporator and an evaporating temperature value of the evaporator; if the temperature value of the copper pipe is less than or equal to a preset entering defrosting mode temperature value, and a difference between the indoor temperature value and the evaporating temperature value is greater than or equal to a second preset difference value, stopping the refrigeration control of the air conditioning unit and controlling the air conditioning unit to defrost.

3. The method of claim 2, wherein, The method further comprises: during the process of controlling the air conditioning unit to defrost, detecting the temperature value of the copper pipe; obtaining a length of time of the defrosting control, if the temperature value of the copper pipe is greater than a preset exiting defrosting mode temperature value, and / or the length of time of the defrosting control is greater than or equal to a preset time length, stopping the defrosting control of the air conditioning unit.

4. The method according to claim 1 or 2, characterized in that, The determining a target running frequency according to the initial running frequency, the set temperature value and the outdoor temperature value comprises: obtaining a first proportional coefficient corresponding to the outdoor temperature value and a second proportional coefficient corresponding to the set temperature value; determining a first product of the outdoor temperature value and the first proportional coefficient, and a second product of the set temperature value and the second proportional coefficient; determining a sum of the first product and the second product to obtain a target sum; determining a difference between the initial running frequency and the target sum as the target running frequency.

5. The method of claim 1, wherein, The controlling the air conditioning unit according to the target upper limit frequency value and the target lower limit frequency value comprises: The running frequency of the compressor is proportionally-integrally-differentiately closed-loop regulated within a first frequency range composed of the target frequency lower limit value and the target frequency upper limit value.

6. The method of claim 1, wherein, The control of the air conditioning unit according to the preset frequency upper limit value and the preset frequency lower limit value comprises: The running frequency of the compressor is proportionally-integrally-differentiately closed-loop regulated within a second frequency range composed of the preset frequency upper limit value and the preset frequency lower limit value.

7. The method of claim 1, wherein, The control of the air conditioning unit in standby comprises: The compressor is controlled to be turned off, the fan in the evaporator is controlled to be turned off, and the fan in the condenser is controlled to be turned off after a time delay.

8. A control device for an air conditioning unit, characterized by The device comprises: An initial parameter acquisition module is configured to acquire a set temperature value of the air conditioner and an initial running frequency of the compressor. A temperature detection module is configured to detect an indoor temperature value and an outdoor temperature value. A target running frequency determination module is configured to determine a target running frequency according to the initial running frequency and the outdoor temperature value. A target temperature upper and lower limit determination module is configured to determine a sum of the set temperature value and a first preset difference value to obtain a target temperature upper limit value, and determine a difference between the set temperature value and the first preset difference value to obtain a target temperature lower limit value. A comparison module is configured to compare the indoor temperature value with the target temperature upper limit value and the target temperature lower limit value to obtain a comparison result. A refrigeration control module is configured to control the air conditioning unit according to the comparison result, comprising: If the indoor temperature value is greater than the target temperature upper limit value, a preset frequency upper limit value and a preset frequency lower limit value of the compressor are acquired, and the air conditioning unit is controlled according to the preset frequency upper limit value and the preset frequency lower limit value. If the indoor temperature value is greater than or equal to the target temperature lower limit value and less than or equal to the target temperature upper limit value, the air conditioning unit is controlled according to the target running frequency. If the indoor temperature value is less than the target temperature lower limit value, the air conditioning unit is controlled to be in standby. The refrigeration control module comprises: A frequency deviation value acquisition submodule is configured to acquire a frequency upper deviation value and a frequency lower deviation value corresponding to the target running frequency. A target frequency upper and lower limit value determination submodule is configured to determine a sum of the target running frequency and the frequency upper deviation value to obtain a target frequency upper limit value, and determine a difference between the target running frequency and the frequency lower deviation value to obtain a target frequency lower limit value. A first control submodule is configured to control the air conditioning unit according to the target frequency upper limit value and the target frequency lower limit value.

9. An air conditioning unit characterized by, The air conditioning unit comprises the control device of the air conditioning unit according to claim 8.

10. An electronic device, comprising: The computer program is stored on the computer readable storage medium and is executed by the processor to implement the control method of the air conditioning unit according to any one of claims 1 to 7.

11. A computer readable storage medium, characterized in that, The computer program is stored on the computer readable storage medium and is executed by the processor to implement the control method of the air conditioning unit according to any one of claims 1 to 7.

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