Control method and device of variable frequency air conditioner and variable frequency air conditioner

Abstract

The application provides a control method and device of a variable frequency air conditioner and the variable frequency air conditioner; the method comprises the following steps: periodically acquiring a temperature parameter of the variable frequency air conditioner when the variable frequency air conditioner is in a refrigeration operation; calculating a target evaporation temperature of the variable frequency air conditioner in a current period according to an outdoor environment temperature, an indoor environment temperature, a user set temperature and a setting parameter; calculating an evaporation temperature difference between the target evaporation temperature and an inner disc temperature, and determining a target correction frequency according to the evaporation temperature difference and a preset threshold; calculating a next target frequency according to the target correction frequency and a current target frequency, and controlling the variable frequency air conditioner to operate according to the next target frequency in a next period. In the control mode, different target evaporation temperatures are accurately calculated according to the temperature parameter and the setting parameter, so as to adjust the frequency of the compressor according to the target evaporation temperature and the inner disc temperature, thereby meeting the refrigeration requirements in different scenes and improving the comfort and energy saving of the variable frequency air conditioner.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, especially to a control method and device of a variable frequency air conditioner and the variable frequency air conditioner. BACKGROUND

[0002] At present, after the existing variable frequency air conditioner is started, closed loop control is mainly performed according to a target evaporation temperature. Specifically, first, an evaporation temperature difference between the target evaporation temperature and an inner disc temperature, that is, ΔT 蒸发温差 =T 制冷目标蒸发温度 -T 内盘温度 is calculated, then a target correction frequency ΔF 目标修正频率 is determined according to the evaporation temperature difference and a corresponding temperature difference interval, and finally a current calculation target frequency is calculated according to a last calculation target frequency, a current target frequency and the target correction frequency, that is, the current calculation target frequency = last calculation target frequency + current target frequency * ΔF 目标修正频率 , so as to control the compressor to operate at the current calculation target frequency. However, when the indoor and outdoor environment temperature changes, the load demand changes, since the above target evaporation temperature is a fixed value, the compressor operates at the current frequency until the set temperature is reached, the control precision is poor, a large amount of energy is wasted, and thus the comfort and energy saving are poor. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a control method and device of a variable frequency air conditioner and the variable frequency air conditioner, so as to alleviate the above technical problems, adjust the frequency of the compressor through a variable target evaporation temperature and inner disc temperature, so as to meet the cooling demand in different scenes without increasing the cost, and improve the comfort and energy saving of the variable frequency air conditioner.

[0004] In the first aspect, an embodiment of the present application provides a control method of a variable frequency air conditioner, comprising: periodically acquiring temperature parameters of the variable frequency air conditioner when the variable frequency air conditioner is in cooling operation; wherein the temperature parameters comprise an outdoor environment temperature, an indoor environment temperature, a user set temperature and an inner disc temperature; calculating a target evaporation temperature of the variable frequency air conditioner in a current period according to the outdoor environment temperature, the indoor environment temperature, the user set temperature and setting parameters; wherein the setting parameters comprise an initial target evaporation temperature, a connecting pipe length, an outdoor environment target value and a plurality of correction coefficients; calculating an evaporation temperature difference between the target evaporation temperature and the inner disc temperature, and determining a target correction frequency according to the evaporation temperature difference and a preset threshold value; calculating a next target frequency according to the target correction frequency and a current target frequency, and controlling the variable frequency air conditioner to operate at the next target frequency in a next period.

[0005] The control method of the variable frequency air conditioner periodically detects the temperature parameter, and accurately calculates different target evaporation temperatures according to the temperature parameter and the setting parameter, so as to adjust the frequency of the compressor according to the target evaporation temperature and the inner disc temperature, thereby meeting the refrigeration requirements in different scenes without increasing the cost, and improving the comfort and energy saving of the variable frequency air conditioner.

[0006] Preferably, the step of calculating the target evaporation temperature of the variable frequency air conditioner in the current period according to the outdoor environment temperature, the indoor environment temperature, the user set temperature and the setting parameter comprises: calculating the target evaporation temperature according to the following formula: T 制冷目标蒸发温度 =A-B*(T 外环 -T0)-C*(T 内环 -T 设定 )-D*(L-5) / L; wherein, T 制冷目标蒸发温度 represents the target evaporation temperature, A represents the initial target evaporation temperature, T 外环 represents the outdoor environment temperature, T0 represents the outdoor environment target value, T 内环 represents the indoor environment temperature, T 设定 represents the user set temperature, L represents the connecting pipe length, B represents the first correction coefficient, C represents the second correction coefficient, and D represents the third correction coefficient.

[0007] Preferably, the value range of A is [8℃, 12℃], and the value range of L is [5m, 50m].

[0008] Preferably, before the step of calculating the next target frequency according to the target correction frequency and the current target frequency, the method further comprises: determining the target calculation mode according to the evaporation temperature difference; wherein, the target calculation mode comprises a first calculation mode, a second calculation mode and a third calculation mode; and calculating the next target frequency according to the target correction frequency and the current target frequency according to the corresponding target calculation mode.

[0009] Preferably, the step of determining the target calculation mode according to the evaporation temperature difference comprises: if the evaporation temperature difference is greater than 0, determining the target calculation mode as the first calculation mode; wherein, the expression of the first calculation mode is F(n+1)=F(n)(1-△F 目标修正频率 ); F(n+1) represents the next target frequency, F(n) represents the current target frequency, and △F 目标修正频率 represents the target correction frequency.

[0010] Preferably, the step of determining the target calculation mode according to the evaporation temperature difference further comprises: if the evaporation temperature difference is equal to 0, determining the target calculation mode as the second calculation mode; wherein, the expression of the second calculation mode is F(n+1)=F(n); F(n+1) represents the next target frequency, and F(n) represents the current target frequency.

[0011] Preferably, the step of determining the target calculation mode according to the evaporation temperature difference further comprises: if the evaporation temperature difference is less than 0, determining the target calculation mode as the third calculation mode; wherein the expression of the third calculation mode is F(n+1)=F(n)(1+△F 目标修正频率 ); F(n+1) represents the next target frequency, F(n) represents the current target frequency, and △F 目标修正频率 represents the target correction frequency.

[0012] In the second aspect, the embodiment of the present application further provides a control device of a variable frequency air conditioner, comprising: a parameter acquisition module, configured to periodically acquire temperature parameters of the variable frequency air conditioner when the variable frequency air conditioner is in cooling operation; wherein the temperature parameters comprise: an outdoor environment temperature, an indoor environment temperature, a user set temperature and an inner disc temperature; a first calculation module, configured to calculate a target evaporation temperature of the variable frequency air conditioner in a current period according to the outdoor environment temperature, the indoor environment temperature, the user set temperature and setting parameters; wherein the setting parameters comprise: an initial target evaporation temperature, a connecting pipe length, an outdoor environment target value and a plurality of correction coefficients; a second calculation module, configured to calculate an evaporation temperature difference between the target evaporation temperature and the inner disc temperature, and determine a target correction frequency according to the evaporation temperature difference and a preset threshold value; and a third calculation module, configured to calculate a next target frequency according to the target correction frequency and a current target frequency, and control the variable frequency air conditioner to operate according to the next target frequency in a next period.

[0013] In the third aspect, the embodiment of the present application further provides a variable frequency air conditioner, comprising a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor implements the steps of the method of the first aspect when executing the computer program.

[0014] In the fourth aspect, the embodiment of the present application further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the steps of the method of the first aspect.

[0015] The embodiment of the present application brings the following beneficial effects:

[0016] The embodiment of the present application provides a control method and device of a variable frequency air conditioner and the variable frequency air conditioner, when the variable frequency air conditioner is in refrigeration operation, first, the temperature parameter of the variable frequency air conditioner is periodically acquired; and the target evaporation temperature of the variable frequency air conditioner in the current period is calculated according to the outdoor environment temperature, the indoor environment temperature, the user set temperature and the setting parameter; then, the evaporation temperature difference between the target evaporation temperature and the inner disc temperature is calculated, and the target correction frequency is determined according to the evaporation temperature difference and the preset threshold value; finally, the next target frequency is calculated according to the target correction frequency and the current target frequency, and the variable frequency air conditioner is controlled to operate according to the next target frequency in the next period. In the control mode, the temperature parameter is periodically detected, and different target evaporation temperatures are accurately calculated according to the temperature parameter and the setting parameter, so that the frequency of the compressor is adjusted according to the target evaporation temperature and the inner disc temperature, thereby meeting the refrigeration requirements in different scenes without increasing the cost, and the comfort and energy saving of the variable frequency air conditioner are improved.

[0017] Other features and advantages of the present application will be set forth in the descriptions below, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the description and the drawings.

[0018] In order to make the above-mentioned objects, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0020] Figure 1 A flow chart of a control method of a variable frequency air conditioner provided by the embodiment of the present application is shown in the figure;

[0021] Figure 2 A structural schematic diagram of a variable frequency air conditioner provided by the embodiment of the present application is shown in the figure;

[0022] Figure 3 A schematic diagram of a control device of a variable frequency air conditioner provided by the embodiment of the present application is shown in the figure;

[0023] Figure 4 Another structural schematic diagram of a variable frequency air conditioner provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] To facilitate understanding of this embodiment, the embodiments of the present invention will be described in detail below.

[0026] This invention provides a control method for a variable frequency air conditioner, such as... Figure 1 As shown, the method includes the following steps:

[0027] Step S102: When the inverter air conditioner is in cooling operation, the temperature parameters of the inverter air conditioner are periodically acquired.

[0028] Specifically, in actual operation, the cooling capacity required by a room varies depending on the load. Therefore, to ensure sufficient cooling capacity output from the inverter air conditioner, thus guaranteeing user comfort, it is necessary to determine the load condition of the inverter air conditioner. This is achieved by periodically monitoring the temperature parameters of the inverter air conditioner during cooling operation to determine different loads. The preferred period is 30 seconds, meaning that the compressor frequency is adjusted and controlled every 30 seconds to ensure that the cooling capacity output by the inverter air conditioner meets the demand and guarantees user comfort.

[0029] Among them, the temperature parameter includes: outdoor ambient temperature T 外环 Indoor ambient temperature T 内环 User-set temperature T 设定 and inner plate temperature T 内盘 .like Figure 2 As shown, the inverter air conditioner includes, but is not limited to: compressor 21, evaporator 22, condenser 23, four-way valve 24, centrifugal fan 25, low-pressure shut-off valve 261, high-pressure shut-off valve 262, electronic expansion valve 263, outer panel 27, gas-liquid separator 28, and a data acquisition device for collecting temperature parameters, including a device for collecting the inner panel temperature T. 内盘 The inner disk temperature sensor 291 is used to collect the indoor ambient temperature T. 内环 Indoor temperature sensor 292 and for acquiring outdoor ambient temperature T 外环 The outdoor temperature sensor is 293. In addition, the inverter air conditioner is also equipped with a remote control device, such as an air conditioner remote control, that communicates with the controller. Users can set the temperature via the remote control device, i.e., the user-set temperature T. 设定It should be noted that the compressor 21 can also be referred to as a variable frequency compressor, and the structure of the variable frequency air conditioner can refer to the existing variable frequency air conditioner, and the embodiments of the present application will not be described in detail here.

[0030] In step S104, the target evaporation temperature of the variable frequency air conditioner in the current period is calculated according to the outdoor environment temperature, the indoor environment temperature, the user set temperature and the setting parameters.

[0031] After the controller periodically acquires the above temperature parameters, the target evaporation temperature that can ensure sufficient refrigerating capacity under the corresponding load condition is determined according to the temperature parameters and the pre-set setting parameters in each period. The setting parameters include: initial target evaporation temperature A, connection pipe length L, outdoor environment target value T0 and multiple correction coefficients. Specifically, the target evaporation temperature is calculated according to the following formula:

[0032] T 制冷目标蒸发温度 =A-B*(T 外环 -T0)-C*(T 内环 -T 设定 )-D*(L-5) / L(1)

[0033] Wherein, T 制冷目标蒸发温度 represents the target evaporation temperature, A represents the initial target evaporation temperature, T 外环 represents the outdoor environment temperature, T0 represents the outdoor environment target value, T 内环 represents the indoor environment temperature, T 设定 represents the user set temperature, L represents the connection pipe length, B represents the first correction coefficient, C represents the second correction coefficient, and D represents the third correction coefficient.

[0034] The initial target evaporation temperature A has a value range of [8℃, 12℃], and is preferably 10℃. The initial target evaporation temperature A of different models is different. Generally, when the rated refrigeration is free running, the actual temperature value of the evaporator inner disc is T 内盘温度 . The above outdoor environment target value T0 is the corresponding outdoor side environment temperature under the rated refrigeration condition. Here, T0 is a constant value, and is preferably 35℃. When T 外环 > 35℃, it means that the load is high, the required refrigerating capacity is larger, T 外环 is larger, the target frequency of the compressor needs to be higher, and T 制冷目标蒸发温度 needs to be smaller; on the contrary, when T 外环 < 35℃, it means that the load is low, the required refrigerating capacity is smaller, T 外环 is smaller, the target frequency of the compressor needs to be lower, and T 制冷目标蒸发温度 needs to be larger.

[0035] In addition, T 内环 -T 设定The larger the difference, the higher the target frequency of the compressor needs to be. 制冷目标蒸发温度 The smaller it needs to be, therefore, T 制冷目标蒸发温度 With T 内环 -T 设定 It is inversely proportional, and corrected by a second correction factor C, so that the calculated T 制冷目标蒸发温度 More accurate.

[0036] And, such as Figure 2 As shown, a first connecting pipe 2611 is provided between the evaporator 22 and the low-pressure shut-off valve 261, and a second connecting pipe 2621 is provided between the evaporator 22 and the high-pressure shut-off valve 262. Here, the sum of the first connecting pipe 2611 and the second connecting pipe 2621 is referred to as the connecting pipe. In practical applications, the longer the connecting pipe length L, the greater the low-pressure attenuation, and T... 制冷目标蒸发温度 The smaller the value of T, the higher the target frequency can be; therefore, T 制冷目标蒸发温度 It is inversely proportional to the length L of the connecting pipe, thus increasing L affects T. 制冷目标蒸发温度 Corrections were made to make the actual operation of the inverter air conditioner more closely resemble the actual installation scenario, thereby improving T 制冷目标蒸发温度 The accuracy of the calculation.

[0037] Where L is the actual installed length of the connecting pipe. When the inverter air conditioner is started and debugged, the specific parameter of L is set by the remote control or wired controller. The normal installation length of the piping is 5m, and the upper limit of the long piping installation of the unit is 50m. That is, the value range of the connecting pipe length L is [5m, 50m]. The specific value can be set according to the actual situation.

[0038] It should be noted that the first correction factor B has a value range of [0.10, 0.20], preferably 0.15; the second correction factor C, also known as the temperature difference correction factor between indoor ambient temperature and user-set temperature, has a value range of [0.05, 0.15], preferably 0.10; and the third correction factor D, also known as the long piping correction factor, has a value range of [1.0, 2.0], preferably 1.5. The specific values ​​of B, C, and D can be adjusted adaptively according to actual conditions.

[0039] In summary, when an inverter air conditioner is operating in cooling mode, different T values ​​are detected. 外环 T 内环 and T 设定 By combining the set parameters and following the formula (1) above, different target evaporation temperatures can be accurately calculated. That is, the target evaporation temperature is determined according to the load, thereby ensuring that the cooling capacity output by the inverter air conditioner meets the cooling demand and ensures the user's comfort.

[0040] Step S106: Calculate the evaporation temperature difference between the target evaporation temperature and the inner plate temperature, and determine the target correction frequency based on the evaporation temperature difference and the preset threshold.

[0041] Specifically, after the target evaporation temperature is calculated, the evaporation temperature difference ΔT 蒸发温差 = T 制冷目标蒸发温度 -T 内盘温度 is calculated first, and then the target correction frequency is determined according to the evaporation temperature difference and the preset threshold value. The preset threshold value includes multiple temperature thresholds, and the preset threshold value is taken as an example including-8℃, -5℃, -3℃, -1℃, 1℃, 3℃, 5℃ and 8℃, multiple preset threshold values form multiple intervals, and each interval corresponds to a target correction frequency, that is, ΔF 目标修正频率 , the interval where ΔT 蒸发温差 is located and the corresponding relationship of ΔF 目标修正频率 are shown in Table 1 as follows:

[0042] Table 1

[0043]

[0044] Therefore, in the current period, the corresponding interval is determined according to the calculated evaporation temperature difference ΔT 蒸发温差 , so that the corresponding ΔF 目标修正频率 can be determined, so as to adjust the frequency of the compressor according to ΔF 目标修正频率 .

[0045] Step S108, the next target frequency is calculated according to the target correction frequency and the current target frequency, and the variable frequency air conditioner is controlled to operate according to the next target frequency in the next period.

[0046] After the target correction frequency is determined, the next target frequency can be calculated according to the target correction frequency and the current target frequency, and the next target frequency is the target frequency of the compressor in the next period, so as to control the variable frequency air conditioner to operate according to the next target frequency in the next period, which improves the comfort experience of the user without increasing the cost.

[0047] The control method of the variable frequency air conditioner provided by the embodiment of the application detects the temperature parameter periodically, and accurately calculates different target evaporation temperatures according to the temperature parameter and the setting parameter, so as to adjust the frequency of the compressor according to the target evaporation temperature and the inner disc temperature, thereby meeting the refrigeration demand in different scenes without increasing the cost, and improving the comfort and energy saving of the variable frequency air conditioner.

[0048] In one embodiment, before the step of calculating the next target frequency according to the target correction frequency and the current target frequency, the method further comprises: determining a target calculation mode according to the evaporation temperature difference; wherein the target calculation mode includes a first calculation mode, a second calculation mode and a third calculation mode; and calculating the next target frequency according to the target correction frequency and the current target frequency according to the corresponding target calculation mode.

[0049] Specifically, if the evaporation temperature difference is greater than 0, that is, when T 制冷目标蒸发温度 > T 内盘温度 , it is determined that the target calculation mode is a first calculation mode; wherein the expression of the first calculation mode is F(n+1)=F(n)(1-△F 目标修正频率 ); F(n+1) represents the next target frequency, F(n) represents the current target frequency, and△F 目标修正频率 represents the target correction frequency.

[0050] In addition, if the evaporation temperature difference is equal to 0, that is, when T 制冷目标蒸发温度 =T 内盘温度 , it is determined that the target calculation mode is a second calculation mode; wherein the expression of the second calculation mode is F(n+1)=F(n); F(n+1) represents the next target frequency, and F(n) represents the current target frequency.

[0051] And if the evaporation temperature difference is less than 0, that is, when T 制冷目标蒸发温度 <T 内盘温度 , it is determined that the target calculation mode is a third calculation mode; wherein the expression of the third calculation mode is F(n+1)=F(n)(1+△F 目标修正频率 ); F(n+1) represents the next target frequency, F(n) represents the current target frequency, and△F 目标修正频率 represents the target correction frequency.

[0052] Therefore, according to the size relationship between T 制冷目标蒸发温度 and T 内盘温度 , different target calculation modes are determined respectively, which meets the refrigeration requirements in different scenes without increasing the cost, improves the energy saving and application range of the variable frequency air conditioner, and realizes diversified control and high adjustment precision.

[0053] In an embodiment, for a low-temperature refrigeration scene; specifically, the variable frequency air conditioning unit is factory-set with A=10℃, T0=35℃, the installed connecting pipe length L=10m, and when the operation is started, T 外环 =30℃, T 内环 =27℃, T 设定 =22℃, B=0.15, C=0.10, and D=1.5.

[0054] According to the above formula (1), T 制冷目标蒸发温度 =9.5℃ can be calculated. At this time, the target evaporation temperature closed-loop control is△T 蒸发温差 =T 制冷目标蒸发温度 -T 内盘温度 =9.5℃-T 内盘温度 , that is, T 内盘温度 is operated as the target according to 9.5℃, and if T 内盘温度If T is 9.5℃, no correction is needed for the frequency of the compressor; otherwise, if T is less than 9.5℃, the frequency of the compressor needs to be corrected according to the actual T and T 内盘温度 If T is 9.5℃, no correction is needed for the frequency of the compressor; otherwise, if T is less than 9.5℃, the frequency of the compressor needs to be corrected according to the actual T and T 内盘温度 If T is 9.5℃, no correction is needed for the frequency of the compressor; otherwise, if T is less than 9.5℃, the frequency of the compressor needs to be corrected according to the actual T and T 制冷目标蒸发温度 If T is 9.5℃, no correction is needed for the frequency of the compressor; otherwise, if T is less than 9.5℃, the frequency of the compressor needs to be corrected according to the actual T and T 蒸发温差 If T is 9.5℃, no correction is needed for the frequency of the compressor; otherwise, if T is less than 9.5℃, the frequency of the compressor needs to be corrected according to the actual T and T 目标修正频率 If T is 9.5℃, no correction is needed for the frequency of the compressor; otherwise, if T is less than 9.5℃, the frequency of the compressor needs to be corrected according to the actual T and T

[0055] In one embodiment, for high-temperature refrigeration scenarios: specifically, the factory settings of the variable-frequency air conditioner are A=10℃, T0=35℃, the installed connecting pipe length L=10m, and when the variable-frequency air conditioner is started, T is detected 外环 =48℃, T 内环 =32℃, T 设定 =22℃, B=0.15, C=0.05, and D=1.5.

[0056] According to the above formula (1), T 制冷目标蒸发温度 =6.8℃ can be calculated. At this time, the target evaporating temperature closed-loop control is: ΔT 蒸发温差 =T 制冷目标蒸发温度 -T 内盘温度 =6.8℃-T 内盘温度 , that is, T 内盘温度 According to 6.8℃ as the target, if T 内盘温度 is 6.8℃, no correction is needed for the frequency of the compressor; otherwise, if T 内盘温度 is less than 6.8℃, the frequency of the compressor needs to be corrected according to the actual T and T 内盘温度 If T is 9.5℃, no correction is needed for the frequency of the compressor; otherwise, if T is less than 9.5℃, the frequency of the compressor needs to be corrected according to the actual T and T 制冷目标蒸发温度 If T is 9.5℃, no correction is needed for the frequency of the compressor; otherwise, if T is less than 9.5℃, the frequency of the compressor needs to be corrected according to the actual T and T 蒸发温差 If T is 9.5℃, no correction is needed for the frequency of the compressor; otherwise, if T is less than 9.5℃, the frequency of the compressor needs to be corrected according to the actual T and T 目标修正频率 If T is 9.5℃, no correction is needed for the frequency of the compressor; otherwise, if T is less than 9.5℃, the frequency of the compressor needs to be corrected according to the actual T and T

[0057] Corresponding to the above method embodiment, the present embodiment also provides a control device of a variable-frequency air conditioner, as shown in Figure 3 The device comprises: a parameter acquisition module 31, a first calculation module 32, a second calculation module 33, and a third calculation module 34; wherein the functions of each module are as follows:

[0058] The parameter acquisition module 31 is used to periodically acquire temperature parameters of the variable-frequency air conditioner when the variable-frequency air conditioner is refrigerating; wherein the temperature parameters comprise: an outdoor environment temperature, an indoor environment temperature, a user-set temperature, and an inner-pan temperature;

[0059] The first calculation module 32 is configured to calculate a target evaporating temperature of the variable frequency air conditioner in a current period according to an outdoor environment temperature, an indoor environment temperature, a user set temperature and setting parameters, wherein the setting parameters comprise an initial target evaporating temperature, a connecting pipe length, an outdoor environment target value and a plurality of correction coefficients.

[0060] The second calculation module 33 is configured to calculate an evaporating temperature difference between the target evaporating temperature and the indoor coil temperature, and determine a target correction frequency according to the evaporating temperature difference and a preset threshold value.

[0061] The third calculation module 34 is configured to calculate a next target frequency according to the target correction frequency and a current target frequency, and control the variable frequency air conditioner to operate according to the next target frequency in a next period.

[0062] The control device of the variable frequency air conditioner provided by the embodiment of the present application periodically detects temperature parameters, accurately calculates different target evaporating temperatures according to the temperature parameters and the setting parameters, adjusts the frequency of the compressor according to the target evaporating temperature and the indoor coil temperature, and meets the refrigeration requirements in different scenes without increasing the cost, thereby improving the comfort and energy saving of the variable frequency air conditioner.

[0063] Preferably, the first calculation module 32 further comprises: calculating the target evaporating temperature according to the following formula: T 制冷目标蒸发温度 =A-B*(T 外环 -T0)-C*(T 内环 -T 设定 )-D*(L-5) / L; wherein T 制冷目标蒸发温度 represents the target evaporating temperature, A represents the initial target evaporating temperature, T 外环 represents the outdoor environment temperature, T0 represents the outdoor environment target value, T 内环 represents the indoor environment temperature, T 设定 represents the user set temperature, L represents the connecting pipe length, B represents the first correction coefficient, C represents the second correction coefficient, and D represents the third correction coefficient.

[0064] Preferably, the value range of A is [8℃, 12℃], and the value range of L is [5m, 50m].

[0065] Preferably, before calculating the next target frequency according to the target correction frequency and the current target frequency, the device further comprises: determining a target calculation mode according to the evaporating temperature difference; wherein the target calculation mode comprises a first calculation mode, a second calculation mode and a third calculation mode; and calculating the next target frequency according to the target correction frequency and the current target frequency according to the corresponding target calculation mode.

[0066] Preferably, the target calculation mode determined according to the evaporation temperature difference comprises: if the evaporation temperature difference is greater than 0, determining the target calculation mode as a first calculation mode; wherein the expression of the first calculation mode is F(n+1)=F(n)(1-△F 目标修正频率 ); F(n+1) represents the next target frequency, F(n) represents the current target frequency, and △F 目标修正频率 represents the target correction frequency.

[0067] Preferably, the target calculation mode determined according to the evaporation temperature difference further comprises: if the evaporation temperature difference is equal to 0, determining the target calculation mode as a second calculation mode; wherein the expression of the second calculation mode is F(n+1)=F(n); F(n+1) represents the next target frequency, and F(n) represents the current target frequency.

[0068] Preferably, the target calculation mode determined according to the evaporation temperature difference further comprises: if the evaporation temperature difference is less than 0, determining the target calculation mode as a third calculation mode; wherein the expression of the third calculation mode is F(n+1)=F(n)(1+△F 目标修正频率 ); F(n+1) represents the next target frequency, F(n) represents the current target frequency, and △F 目标修正频率 represents the target correction frequency.

[0069] The control device of the variable frequency air conditioner provided by the embodiment of the application has the same technical features as the control method of the variable frequency air conditioner provided by the above embodiment, and can solve the same technical problems and achieve the same technical effects.

[0070] The embodiment of the application further provides a variable frequency air conditioner, which comprises a processor and a memory, the memory stores machine executable instructions capable of being executed by the processor, and the processor executes the machine executable instructions to realize the control method of the variable frequency air conditioner.

[0071] As shown in Figure 4 , the variable frequency air conditioner comprises a processor 100 and a memory 101, the memory 101 stores machine executable instructions capable of being executed by the processor 100, and the processor 100 executes the machine executable instructions to realize the control method of the variable frequency air conditioner.

[0072] Further, Figure 4 As shown in , the variable frequency air conditioner further comprises a bus 102 and a communication interface 103, and the processor 100, the communication interface 103 and the memory 101 are connected through the bus 102.

[0073]

[0073] The memory 101 can include a high-speed random access memory (RAM), and can also include a non-volatile memory such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 103 (which can be wired or wireless), and the Internet, a wide area network, a local area network, a metropolitan area network, etc. can be used. The bus 102 can be an ISA (Industrial Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Enhanced Industry Standard Architecture) bus, etc. The above buses can be divided into address buses, data buses, control buses, etc. For ease of representation, Figure 4 Only one bidirectional arrow is used to represent the above buses, but it does not mean that there is only one bus or only one type of bus.

[0074] The processor 100 can be an integrated circuit chip with processing capability. In implementation process, each step of the above method can be completed by integrated logic circuit of hardware in the processor 100 or instruction in the form of software. The processor 100 described above can be a general processor, including a central processing unit (CPU), a network processor (NP), etc.; can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. Each method, step and logic block diagram disclosed in the embodiment of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in combination with the embodiment of the present application can be directly embodied as a hardware code processor for execution, or a combination of hardware and software modules in the code processor for execution. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, etc. The storage medium in the art. The storage medium is located in the memory 101, and the processor 100 reads the information in the memory 101, and combines the hardware to complete the steps of the method of the above embodiment.

[0075] The embodiment also provides a machine readable storage medium, the machine readable storage medium stores machine executable instructions, when the machine executable instructions are called and executed by the processor, the machine executable instructions cause the processor to implement the control method of the variable frequency air conditioner.

[0076] The control method of the variable frequency air conditioner, the device of the variable frequency air conditioner and the computer program product of the variable frequency air conditioner provided by the embodiment of the present application include a computer readable storage medium storing program codes, the instructions included in the program codes can be used to execute the method described in the foregoing method embodiment, and specific implementation can be referred to the method embodiment, and will not be described here.

[0077] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the foregoing method embodiment, and will not be described here.

[0078] In addition, in the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through intervening medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0079] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a nonvolatile computer readable storage medium executable by a processor. Based on this understanding, the technical solutions of the present application or the part of the prior art or the part of the technical solutions can be embodied in the form of software products. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and various program code storage media.

[0080] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0081] Finally, it should be noted that the above-described embodiments are merely specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit the same. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any person skilled in the art can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features, within the technical scope disclosed by the present application. The modifications, changes or replacements do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A control method of a variable frequency air conditioner, characterized by, The method comprises the following steps: When the variable frequency air conditioner is running in a cooling mode, periodically acquire temperature parameters of the variable frequency air conditioner; wherein the temperature parameters comprise an outdoor environment temperature, an indoor environment temperature, a user set temperature and an inner disc temperature; According to the outdoor environment temperature, the indoor environment temperature, the user set temperature and setting parameters, a target evaporating temperature of the variable frequency air conditioner in a current period is calculated; wherein the setting parameters include: an initial target evaporating temperature, a connecting pipe length, an outdoor environment target value and a plurality of correction coefficients; the target evaporating temperature is calculated according to the following formula: T 制冷目标蒸发温度 =A-B*(T 外环 -T0)-C*(T 内环 -T 设定 )-D*(L-5) / L; wherein T 制冷目标蒸发温度 represents the target evaporating temperature, A represents the initial target evaporating temperature, T 外环 represents the outdoor environment temperature, T0 represents the outdoor environment target value, T 内环 represents the indoor environment temperature, T 设定 represents the user set temperature, L represents the connecting pipe length, B represents a first correction coefficient, C represents a second correction coefficient, and D represents a third correction coefficient, and the value range of the L is [5m, 50m]. Calculate an evaporation temperature difference between the target evaporation temperature and the inner disc temperature, and determine a target correction frequency according to the evaporation temperature difference and a preset threshold value; According to the target correction frequency and a current target frequency, calculate a next target frequency, and control the variable frequency air conditioner to run according to the next target frequency in a next period.

2. The method of claim 1, wherein, The value range of the A is [8 ℃, 12 ℃].

3. The method of claim 1, wherein, Before the step of calculating the next target frequency according to the target correction frequency and the current target frequency, the method further comprises the following steps: Determine a target calculation mode according to the evaporation temperature difference; wherein the target calculation mode comprises a first calculation mode, a second calculation mode and a third calculation mode; According to the target correction frequency and the current target frequency, calculate the next target frequency according to the corresponding target calculation mode.

4. The method of claim 3, wherein, The step of determining the target calculation mode according to the evaporation temperature difference comprises the following steps: If the evaporation temperature difference is greater than 0, it is determined that the target calculation mode is the first calculation mode; wherein the expression of the first calculation mode is F(n+1)=F(n)(1-△F 目标修正频率 ); F(n+1) represents the next target frequency, F(n) represents the current target frequency, and △F 目标修正频率 represents the target correction frequency.

5. The method of claim 4, wherein, The step of determining the target calculation mode according to the evaporation temperature difference further comprises the following steps: If the evaporation temperature difference is equal to 0, determine that the target calculation mode is the second calculation mode; wherein the expression of the second calculation mode is F (n+1) = F (n); F (n+1) represents the next target frequency, and F (n) represents the current target frequency.

6. The method of claim 4, wherein, The step of determining the target calculation mode according to the evaporation temperature difference further comprises the following steps: If the evaporation temperature difference is less than 0, it is determined that the target calculation mode is the third calculation mode; wherein the expression of the third calculation mode is F(n+1)=F(n)(1+△F 目标修正频率 ); F(n+1) represents the next target frequency, F(n) represents the current target frequency, and△F 目标修正频率 represents the target correction frequency.

7. A control device for a variable frequency air conditioner, characterized in that, The method comprises the following steps: A parameter acquisition module is configured to periodically acquire temperature parameters of the variable frequency air conditioner when the variable frequency air conditioner is running in a cooling mode; wherein the temperature parameters comprise an outdoor environment temperature, an indoor environment temperature, a user set temperature and an inner disc temperature; The first calculation module is configured to calculate a target evaporating temperature of the variable frequency air conditioner in a current period according to the outdoor environment temperature, the indoor environment temperature, the user set temperature and setting parameters, wherein the setting parameters include an initial target evaporating temperature, a connecting pipe length, an outdoor environment target value and a plurality of correction coefficients; and the target evaporating temperature is calculated according to the following formula: T 制冷目标蒸发温度 =A-B*(T 外环 -T0)-C*(T 内环 -T 设定 )-D*(L-5) / L; wherein T 制冷目标蒸发温度 represents the target evaporating temperature, A represents the initial target evaporating temperature, T 外环 represents the outdoor environment temperature, T0 represents the outdoor environment target value, T 内环 represents the indoor environment temperature, T 设定 represents the user set temperature, L represents the connecting pipe length, B represents a first correction coefficient, C represents a second correction coefficient, and D represents a third correction coefficient, and the value range of the L is [5m, 50m]. A second calculation module is configured to calculate an evaporation temperature difference between the target evaporation temperature and the inner disc temperature, and determine a target correction frequency according to the evaporation temperature difference and a preset threshold value; A third calculation module is configured to calculate a next target frequency according to the target correction frequency and a current target frequency, and control the variable frequency air conditioner to run according to the next target frequency in a next period.

8. A variable frequency air conditioner comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein, The processor executes the computer program to realize the steps of the method in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to perform the steps of the method in any one of claims 1-6.

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