Air conditioner segmented independent control method and variable frequency air conditioner equipment

Abstract

The invention relates to an air conditioner control technology, discloses an air conditioner segmented independent control method and variable frequency air conditioner equipment, and solves the problems that an existing variable frequency air conditioner control scheme easily causes temperature overshoot, affects the comfort of a user and causes energy waste. In the air conditioner system, the independent start-stop schemes are set for various time periods and various scenes, independent parameter measurement and distribution are carried out for all the start-stop schemes, and in the working process of the air conditioner, the air conditioner system carries out switching of the start-stop schemes according to the current environment state and the preset switching triggering mechanism.

Description

Technical Field

[0001] The invention relates to air conditioning control technology, and in particular to an air conditioning segmented independent control method and a variable frequency air conditioning device. Background Art

[0002] Heat load refers to the amount of heat that needs to be continuously removed by the air conditioner in order for the room to reach the set temperature. During the daytime in summer, the heat load of the room mainly comes from the strong solar radiation, while the heat load generated by the heat sources in the environment (such as people, electrical appliances, etc.) accounts for a small proportion and can be ignored; however, at night, the situation changes significantly. As the sun sets, the outdoor temperature gradually decreases, the heat transmitted to the room is greatly reduced, and the heat load of the room is also greatly reduced compared to the daytime. The required air conditioning cooling capacity is actually much less than that during the day, so we can find that in summer, the day and night are in completely different cooling environments.

[0003] Then in this cooling environment with different day and night conditions, during the day, if the air conditioner we use is too small (that is, the upper limit of the performance output range is low), then the high-power output capacity will inevitably be poor. Such an air conditioner cannot cope with the high-intensity heat load during the day and cannot meet the user's cooling needs, making people feel very uncomfortable. Therefore, we have to use air conditioners with large specifications. However, this oversized air conditioner still has a disadvantage. The air conditioner with a high performance upper limit cannot maintain a very low performance lower limit. This is due to the mechanical properties of the air conditioner compressor displacement. For example, the performance lower limit of a high-power air conditioner must be higher than that of a low-power air conditioner. This is an inherent defect that cannot be solved. Then, such a large-specification air conditioner will have a low load demand at night, and its minimum performance output will be greater than the actual demand, resulting in the room heat load at night being lower than the minimum capacity adjustment range of the air conditioner.

[0004] In this scenario, the cooling capacity of the air conditioner is greater than the required heat load of the room, and the indoor temperature will be significantly lower than the set temperature, which will "wake people up from the cold". At this time, the air conditioner can only be shut down to prevent the temperature from continuing to drop; but after shutting down, another problem will arise, that is, the adjustment accuracy of existing air conditioners is generally more than ±1°C. When the air conditioner determines that the indoor temperature exceeds the set temperature through the room temperature sensor on the panel, that is, when it determines that the air conditioner can be turned on again, in fact, the room temperature at this time, especially the temperature of the user's sleeping environment, has already exceeded the set temperature by more than 2 to 3°C, which is easy to "wake people up from the heat". This is the so-called "overshoot" phenomenon in the control field, which may cause users to wake up from the cold or heat, which will seriously affect our sleep, reduce the comfort of use, and cause energy waste. Summary of the invention

[0005] The technical problem to be solved by the present invention is to propose an air conditioning segmented independent control method and a variable frequency air conditioning device to solve the problem that the existing variable frequency air conditioning control scheme is prone to cause temperature overshoot, which affects user comfort and causes energy waste.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] In one aspect, the present invention provides a method for independently controlling air conditioner sections, which is applied to variable frequency air conditioners. The method comprises:

[0008] In the air-conditioning system, independent start-stop plans are set for various time periods and various scenarios, and independent parameter measurement and allocation are performed for each start-stop plan. During the operation of the air-conditioning, the air-conditioning system switches the start-stop plan according to the current environmental conditions and the preset switching trigger mechanism.

[0009] Furthermore, the multiple time periods are multiple time periods within a day; or different time periods in a week, a month, a season or a year.

[0010] Furthermore, the multiple time periods are daytime and nighttime, and independent start-stop schemes P1 and P2 are respectively provided for the two scenarios of daytime and nighttime, and independent parameter measurement and allocation are performed for the two start-stop schemes, thereby forming a performance output interval C1 adapted to high load during the daytime and a performance output interval C2 adapted to low load at night;

[0011] The performance output interval C1 is the same as the default performance interval of the air-conditioning system of this specification; the lower limit of the performance output interval C2 is lower than R0 and lower than the lower limit of the performance output interval C1; the upper limit of the performance output interval C2 is higher than the lower limit of the performance output interval C1; R0 is the average heat load value of the room throughout the day;

[0012] During the operation of the air conditioner, the air conditioner system switches between the two start-stop schemes P1 and P2 according to the current environmental conditions and the preset switching trigger mechanism.

[0013] Furthermore, the switching trigger mechanism is a time period trigger, specifically: the air conditioner obtains the time after connecting to the Internet through the network module, and automatically triggers the judgment after reaching a preset time period, or, after the air conditioner is connected to the control unit, the clock module inside the air conditioner automatically obtains the time of the control unit and synchronizes the time, and automatically triggers the judgment after reaching a preset time period.

[0014] Furthermore, the switching trigger mechanism is a light-sensing trigger; specifically, a light-sensing sensor head provided on the air-conditioning panel or an external temperature and humidity sensor that wirelessly communicates with the air-conditioning detects the current light, and a triggering judgment is made by determining the light threshold.

[0015] Furthermore, the switching trigger mechanism is a noise trigger; specifically, a noise sensor arranged on an external temperature and humidity sensor based on wireless communication between the air conditioning panel and the air conditioner detects noise, and a trigger determination is made by determining a noise threshold.

[0016] Furthermore, the switching trigger mechanism is an infrared body sensing trigger; specifically, an infrared sensor arranged on an external temperature and humidity sensor based on wireless communication between the air conditioning panel and the air conditioner is used to detect the human body distance, and a trigger judgment is made by determining the human body distance threshold.

[0017] Furthermore, the switching trigger mechanism is a manual mode limited trigger, specifically: C2 is set to be an independent mode setting for selection in the air-conditioning control unit; or, C2 is set to be hidden under other modes for manual selection.

[0018] Furthermore, the switching trigger mechanism is an overshoot trigger, specifically: when the air-conditioning system runs continuously at P1, after reaching a set time period, the system makes a judgment, and immediately switches to P2 when an overshoot phenomenon occurs for the first time.

[0019] Furthermore, during the execution of the start-stop plan P2, all operating parameters are revised for the second time, specifically:

[0020] The performance output interval C2 is divided into multiple levels of sub-intervals. The operating parameters corresponding to the next level of sub-intervals are set by scaling based on the previous level of sub-intervals. When the air conditioner executes performance output in the current level of sub-interval, the environmental variables are introduced to determine whether the air conditioner enters the control of the next level of sub-interval.

[0021] Furthermore, the start-stop scheme includes:

[0022] The system module is used to limit the air-conditioning system parameters in the performance output ranges C1 and C2, including the compressor frequency cf, the internal fan speed if, the external fan speed of, the expansion valve step number vs, the fresh fan speed af, etc. in any fixed operation link; the fixed operation link can be any link such as the startup phase or the adjustment phase.

[0023] Furthermore, the start-stop scheme also includes:

[0024] The process module is used to limit the air conditioning process parameters of the performance output intervals C1 and C2, including the start waiting time T1, adjustment waiting time T2, frequency increase speed fs, etc. between the two operating links; the fixed operating link can be any link such as the start link or the adjustment link.

[0025] Furthermore, the setting method of limiting the system parameters and process parameters is as follows:

[0026] C1 is the default setting, and C2 is the fixed preset; or, the setting method of the system parameters and process parameters in C1 and C2 is to convert them according to the ratio T, C2 = C1 × T; the size of the ratio T is inversely proportional to the matching number of the model.

[0027] Furthermore, the start-stop scheme also includes:

[0028] Function parameter module, which is used to limit the parameters of other auxiliary function components in the air-conditioning system except performance output, including: the brightness pb of the air-conditioning display panel, the buzzer volume bv, and the voice speaker volume sv; among them, all pb, bv, and sv in C2 use the same parameters of C1 as the basic value, and are steplessly adjusted according to the time difference ratio.

[0029] Furthermore, the start-stop scheme also includes:

[0030] The temperature control module is used to limit the control parameters of the air-conditioning system when it enters the fuzzy control link; when the air-conditioning system enters the fuzzy control link: the C1 scheme is controlled according to the one-dimensional fuzzy control table A, and the table A is specifically a control table in which the temperature difference accuracy and the temperature change rate accuracy are exactly the same and are greater than 1°C; the C2 scheme is controlled according to the multidimensional fuzzy control table B; the table B is specifically a multidimensional fuzzy control table with table A as the parent area and a sub-area.

[0031] Furthermore, the temperature difference accuracy and temperature change rate accuracy of the mother area are limited to within ±3°C;

[0032] The area where 3°C> temperature difference accuracy and temperature change rate accuracy>0.5°C is set as a general adjustment area; there are 4 general adjustment areas; the range of the sub-area is limited to the area other than the 4 general adjustment areas in the parent area;

[0033] The temperature difference in the multidimensional fuzzy control table B is the set temperature minus the current indoor temperature; the temperature change rate in the multidimensional fuzzy control table B is (current indoor temperature minus the indoor temperature before the interval time t) ÷ the interval time t.

[0034] Furthermore, the sub-region can be adjusted by 3rd-order fuzzy control, and the adjustment is performed according to the stages of coarse adjustment-fine adjustment-gaze. The temperature difference accuracy in the three stages becomes smaller and smaller, the temperature change rate accuracy becomes smaller and smaller, and the adjustment range becomes smaller and smaller.

[0035] Furthermore, in the three-order adjustment of the sub-region of the multidimensional fuzzy control table, the temperature difference accuracy of the first stage is 1°C, and the adjustment range is 1HZ; the temperature difference accuracy of the second stage is 0.2°C, and the adjustment range is 0.2HZ; the temperature difference accuracy of the third stage is 0.1°C, and the adjustment range is 0.1HZ;

[0036] In the sub-area, a micro-level adjustment amount (▽) is set, and the micro-level adjustment amount is limited to a multiple of 0.1HZ. The adjustment amount is set only when the temperature difference and temperature change are both identified to be 0.1°C and have the same sign, and the settings are all micro-level adjustments.

[0037] Furthermore, the first order of the sub-region is defined as a coarse adjustment region, specifically:

[0038] The area where the temperature difference accuracy is less than 0.5°C and the temperature change rate accuracy is greater than 0.5°C is set as coarse adjustment area I, and there are 2 in total;

[0039] The area where the temperature difference accuracy is greater than 0.5°C and the temperature change rate accuracy is less than 0.5°C is set as coarse adjustment area II, and there are 2 in total;

[0040] In the coarse adjustment zone I, the maximum number of identical adjustment values ​​in any horizontal dimension is ≥4; in the coarse adjustment zone II, the maximum number of identical adjustment values ​​in any vertical dimension is ≥4.

[0041] Furthermore, the second order of the sub-region is defined as a fine-tuning region, specifically:

[0042] 0.1℃<temperature difference accuracy≤0.5℃, and 0.1℃<temperature change rate accuracy≤0.5℃;

[0043] In the fine-tuning area, the maximum number of identical adjustments in any horizontal or vertical dimension is less than 4.

[0044] Furthermore, the third order of the sub-areas is defined as the gaze area, specifically:

[0045] 0℃≤Temperature difference accuracy≤0.1℃, and 0℃≤Temperature change rate accuracy≤0.1℃;

[0046] In the staring area, the adjustment amount is only used when the temperature difference and temperature change jointly identify a difference of 0.1°C, otherwise the adjustment amount is set to 0.

[0047] Furthermore, in the multidimensional fuzzy control table, when calculating the room temperature change rates of the general adjustment area, the coarse adjustment area, the fine adjustment area and the staring area, the setting amount of the interval time t increases successively.

[0048] Furthermore, when calculating the room temperature change rate in the general adjustment area, the interval time t is set to t0 time; when calculating the room temperature change rate in the coarse adjustment area, the interval time t is set to 2t0 time; when calculating the room temperature change rate in the fine adjustment area, the interval time t is set to 3t0 time; when calculating the room temperature change rate in the staring area, the interval time t is set to 5t0 time.

[0049] Furthermore, the t0 time is 1 minute.

[0050] Further, the multidimensional fuzzy control table acquisition method includes: after obtaining the multidimensional fuzzy control table a in the laboratory environment, storing the multidimensional fuzzy control table a in the air conditioner memory, and then correcting the fuzzy adjustment amount in the multidimensional fuzzy control table a according to the difference between the outdoor temperature of the actual use environment of the air conditioner and the outdoor temperature corresponding to the laboratory environment and a preset correction coefficient, to obtain a corrected multidimensional fuzzy control table b;

[0051] The correction formula is:

[0052] The adjustment amount in the multidimensional fuzzy control table b = k1 (the current actual outdoor temperature - the outdoor temperature corresponding to the laboratory environment) × the adjustment amount in the multidimensional fuzzy control table a;

[0053] Among them, k1 is the preset correction coefficient.

[0054] Furthermore, a fuzzy adjustment amount proportionality mechanism is provided in each area of ​​the multidimensional fuzzy control table. When entering the fuzzy adjustment link, the base frequency Ff when entering the fuzzy adjustment stage is used as a reference to calculate the ratio Pr of each fuzzy adjustment amount to the base frequency, and all fixed fuzzy adjustment amounts in the entire fuzzy control table are converted into corresponding Pr and stored in the system. When the fuzzy control amount is adjusted next time, the current real-time frequency Fr×Pr is used to obtain the corresponding fuzzy adjustment amount, and the fuzzy adjustment is performed with the corresponding fuzzy adjustment amount.

[0055] Furthermore, in the third-order adjustment of the sub-region of the multidimensional fuzzy control table, the minimum adjustment amount can reach 0.1 Hz.

[0056] Furthermore, the control method with an adjustment amount of 0.1HZ is:

[0057] In the temperature control software design, the temperature-resistance relationship table with a temperature interval of 1°C is converted into a temperature-AD sampling value relationship table with a temperature interval of 0.1°C;

[0058] The indoor unit temperature sensor samples the current temperature of the internal resistor, and after AD conversion, the conversion result is looked up in a temperature-AD sampling value relationship table with a temperature interval of 0.1°C to obtain the current indoor temperature value. The current temperature of the internal resistor is the AD sampling value;

[0059] The indoor unit MCU decodes the current indoor temperature setting value and transmits the indoor temperature setting value and the current indoor temperature value to the outdoor unit MCU;

[0060] The outdoor unit MCU compares the indoor temperature setting value with the current indoor temperature value to obtain the temperature difference value, and controls the operation of the compressor according to the size of the temperature difference value with an integer multiple of 0.1Hz and a minimum frequency increment / decrement of 0.1HZ.

[0061] On the other hand, the present invention further provides a variable frequency air conditioning device, which includes a processor and a memory, wherein the memory stores a computer program, and the processor implements the above-mentioned air conditioning segmented independent control method by executing the computer program.

[0062] The beneficial effects of the present invention are:

[0063] (1) The present invention sets independent start-stop schemes by dividing different time periods and scenes, and performs independent parameter measurement and allocation for each start-stop scheme. During the operation of the air conditioner, the air conditioner system switches the start-stop scheme according to the current environmental state and the preset switching trigger mechanism. In this way, the real-time and accurate matching of the air conditioner output cooling capacity and the indoor environmental heat load is achieved, the accuracy of air conditioner control is improved, and other factors affecting comfort (wind speed, noise) are taken into account, so that the performance of the air conditioner can further match the usage scene state, thereby significantly improving the stability and comfort of the air conditioner operation.

[0064] (2) In the fuzzy control of low heat load scenarios, the multidimensional fuzzy control table used is composed of a parent region and a sub-region, where the sub-region can be adjusted by third-order fuzzy control. In addition, the temperature change rate accuracy in the three stages is getting smaller and smaller, and the adjustment range is getting smaller and smaller, thereby achieving more refined control of the temperature. The variable frequency air conditioner can better adapt to the room load size and load change trend during fuzzy control to avoid overshoot, thereby improving user comfort while reducing energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 It is a schematic diagram of the settings for performance intervals C1 and C2;

[0066] Figure 2 Schematic diagram of each area in the multidimensional fuzzy control table, where mark 1 is the coarse adjustment area I, mark 2 is the coarse adjustment area II, mark 3 is the fine adjustment area, and mark 4 is the gaze area. DETAILED DESCRIPTION

[0067] The present invention aims to provide an air conditioning segmented independent control method and variable frequency air conditioning equipment, so as to solve the problem that the existing variable frequency air conditioning control scheme is easy to cause temperature overshoot, which affects the user's comfort and causes energy waste. In the scheme of the present invention, independent start-stop schemes are set respectively by dividing different time periods and scenes, and independent parameter measurement and allocation are performed for each start-stop scheme. During the operation of the air conditioner, the air conditioning system switches the start-stop scheme according to the preset switching trigger mechanism according to the current environmental state, so as to achieve real-time and accurate matching of the air conditioning output cooling capacity with the indoor environmental heat load, thereby improving the accuracy of air conditioning control. In addition, when the variable frequency air conditioner enters the fuzzy adjustment link in the low heat load scene, multi-dimensional variable fuzzy control is performed according to the set multi-dimensional fuzzy control table; wherein, the multi-dimensional fuzzy control table is refined on the basis of the existing fuzzy control table, specifically, it is composed of a parent area and a sub-area, wherein the sub-area can be adjusted by a third-order fuzzy control, and the temperature change rate accuracy of the three stages is getting smaller and smaller, and the adjustment range is getting smaller and smaller. In this way, the present invention can implement multi-dimensional variable fuzzy control according to the actual environment, room load conditions, and load change trends to achieve more refined regulation and control of temperature, thereby improving user comfort while reducing energy waste.

[0068] Example

[0069] In the air-conditioning segmented independent control method provided in this embodiment, in the air-conditioning system, independent start-stop plans are set for various time periods and various scenarios, and independent parameter measurement and allocation are performed for each start-stop plan. During the air-conditioning operation, the air-conditioning system executes the switching of the start-stop plan according to the current environmental status and the preset switching trigger mechanism.

[0070] The multiple time periods may be multiple time periods within a day, may be two time periods, may be three time periods, or even M time periods; the multiple time periods may also be a week, a month, a quarter, or a year, or even N types of classification control methods.

[0071] In a typical example, multiple time periods are independently controlled in two sections within a day, namely day and night, and the loads during the day and night are different. Different performance outputs are output according to the loads. The application object can be an air-conditioning system or other refrigeration systems, such as refrigerators, freezers, and semiconductor refrigeration systems, etc.

[0072] For example, for independent day and night control of the air conditioner, this embodiment provides independent start-stop schemes P1 and P2 for the day and night scenarios, and performs independent parameter measurement and allocation for the two start-stop schemes, thereby forming a performance output interval C1 adapted to high load during the day and a performance output interval C2 adapted to low load at night;

[0073] See also Figure 1 , the performance output interval C1 is the same as the default performance interval of the air-conditioning system of this specification, the lower limit of the performance output interval C2 is lower than R0, and lower than the lower limit of the performance output interval C1, and the upper limit of the performance output interval C2 is higher than the lower limit of the performance output interval C1; R0 is the average heat load value of the room throughout the day;

[0074] During the operation of the air conditioner, the air conditioner system switches between the two start-stop schemes P1 and P2 according to the current environmental conditions and the preset switching trigger mechanism.

[0075] In specific implementation, the switching trigger mechanism can be any of the following:

[0076] (1) Time period triggering, specifically: the air conditioner obtains the time after connecting to the network through the network module, and automatically triggers the judgment after reaching the preset time period; or, after the air conditioner is connected to the control unit, the clock module inside the air conditioner automatically obtains the time of the control unit and synchronizes the time, and automatically triggers the judgment after reaching the preset time period.

[0077] (2) Light-sensing triggering: Specifically, a light-sensing sensor head installed on the air-conditioning panel or an external temperature and humidity sensor that wirelessly communicates with the air-conditioning detects the current light intensity, and a triggering judgment is made by determining the light intensity threshold.

[0078] (3) Noise triggering: Specifically, a noise sensor is installed on an external temperature and humidity sensor based on wireless communication between the air conditioner panel and the air conditioner to detect noise, and a triggering judgment is made by determining the noise threshold.

[0079] (4) Infrared body sensing triggering: Specifically, an infrared sensor installed on an external temperature and humidity sensor based on wireless communication between the air conditioning panel and the air conditioner detects the distance to the human body, and triggers the judgment by determining the human body distance threshold.

[0080] (5) Manual mode limit trigger, specifically: C2 is set to be an independent mode setting for selection in the air conditioning control unit; or C2 is set to be hidden under other modes for manual selection.

[0081] (6) Overshoot trigger: When the air conditioning system is running continuously at P1, after reaching the set time period, the system will make a judgment and immediately switch to P2 when overshoot occurs for the first time.

[0082] In specific implementation, the start-stop scheme includes:

[0083] The system module is used to limit the air-conditioning system parameters in the performance output ranges C1 and C2, including the compressor frequency cf, the internal fan speed if, the external fan speed of, the expansion valve step number vs, the fresh fan speed af, etc. in any fixed operation link; the fixed operation link can be any link such as the startup phase or the adjustment phase.

[0084] The process module is used to limit the air conditioning process parameters of the performance output intervals C1 and C2, including the start waiting time T1, adjustment waiting time T2, frequency increase speed fs, etc. between the two operating links; the fixed operating link can be any link such as the start link or the adjustment link.

[0085] The setting method of limiting the system parameters and process parameters is as follows:

[0086] C1 is the default setting, and C2 is the fixed preset; or, the setting method of the system parameters and process parameters in C1 and C2 is to convert them according to the ratio T, C2 = C1 × T; the size of the ratio T is inversely proportional to the matching number of the model.

[0087] Function parameter module, which is used to limit the parameters of other auxiliary function components in the air-conditioning system except performance output, including: the brightness pb of the air-conditioning display panel, the buzzer volume bv, and the voice speaker volume sv; among them, all pb, bv, and sv in C2 use the same parameters of C1 as the basic value, and are steplessly adjusted according to the time difference ratio.

[0088] The temperature control module is used to limit the control parameters of the air-conditioning system when it enters the fuzzy control link; when the air-conditioning system enters the fuzzy control link: the C1 scheme is controlled according to the one-dimensional fuzzy control table A, and the table A is specifically a control table in which the temperature difference accuracy and the temperature change rate accuracy are exactly the same and are greater than 1°C; the C2 scheme is controlled according to the multidimensional fuzzy control table B; the table B is specifically a multidimensional fuzzy control table with table A as the parent area and a sub-area.

[0089] Wherein, the multidimensional fuzzy control table includes a parent region and sub-regions contained in the parent region;

[0090] The temperature difference accuracy and temperature change rate accuracy of the mother area are limited to within ±3°C;

[0091] The area where 3°C>temperature difference accuracy and temperature change rate accuracy>0.5°C is set as a general adjustment area; there are 4 general adjustment areas; the range of the sub-area is limited to the area in the parent area except the 4 general adjustment areas.

[0092] An exemplary multi-dimensional fuzzy control table is shown in Table 1 below:

[0093] Table 1 Multidimensional fuzzy control table

[0094]

[0095] The temperature difference in the table is the set temperature - current indoor temperature; the temperature change rate is (current indoor temperature - indoor temperature before interval time t) ÷ interval time t.

[0096] The sub-areas in the table can be adjusted by 3rd-order fuzzy control, and the adjustment is carried out according to the stages of coarse adjustment-fine adjustment-gaze. The temperature difference accuracy of the three stages is getting smaller and smaller, the temperature change rate accuracy is getting smaller and smaller, and the adjustment range is getting smaller and smaller. Specifically, in the three-order adjustment of the sub-area, the temperature difference accuracy of the first stage is 1°C, and the adjustment range is 1HZ; the temperature difference accuracy of the second stage is 0.2°C, and the adjustment range is 0.2HZ; the temperature difference accuracy of the third stage is 0.1°C, and the adjustment range is 0.1HZ; in the sub-area, a micro-level adjustment amount (▽) is set, and the micro-level adjustment amount is limited to a multiple of 0.1HZ. The adjustment amount is set only when the temperature difference and temperature change are jointly identified as 0.1°C and have the same sign, and the micro-level adjustment amount is set.

[0097] In the third-order adjustment of the sub-region of the multi-dimensional fuzzy control table implemented in this way, the minimum adjustment amount can reach 0.1HZ. The control method with an adjustment amount of 0.1HZ is:

[0098] In the temperature control software design, the temperature-resistance relationship table with a temperature interval of 1°C is converted into a temperature-AD sampling value relationship table with a temperature interval of 0.1°C;

[0099] The indoor unit temperature sensor samples the current temperature of the internal resistor, and after AD conversion, the conversion result is looked up in a temperature-AD sampling value relationship table with a temperature interval of 0.1°C to obtain the current indoor temperature value. The current temperature of the internal resistor is the AD sampling value;

[0100] The indoor unit MCU decodes the current indoor temperature setting value and transmits the indoor temperature setting value and the current indoor temperature value to the outdoor unit MCU;

[0101] The outdoor unit MCU compares the indoor temperature setting value with the current indoor temperature value to obtain the temperature difference value, and controls the operation of the compressor according to the size of the temperature difference value with an integer multiple of 0.1Hz and a minimum frequency increment / decrement of 0.1HZ.

[0102] For the multidimensional fuzzy control table, the three-order of its sub-region is as follows:

[0103] ①The first order is defined as the coarse adjustment area, specifically:

[0104] The area where the temperature difference accuracy is less than 0.5°C and the temperature change rate accuracy is greater than 0.5°C is set as coarse adjustment area I, and there are 2 in total;

[0105] The area where the temperature difference accuracy is greater than 0.5°C and the temperature change rate accuracy is less than 0.5°C is set as coarse adjustment area II, and there are 2 in total;

[0106] In the coarse adjustment zone I, the maximum number of identical adjustment values ​​in any horizontal dimension is ≥4; in the coarse adjustment zone II, the maximum number of identical adjustment values ​​in any vertical dimension is ≥4.

[0107] ②The second order of the sub-region is defined as the fine-tuning region, specifically:

[0108] 0.1℃<temperature difference accuracy≤0.5℃, and 0.1℃<temperature change rate accuracy≤0.5℃;

[0109] In the fine-tuning area, the maximum number of identical adjustments in any horizontal or vertical dimension is less than 4.

[0110] ③The third order of sub-areas is defined as the gaze area, specifically:

[0111] 0℃≤Temperature difference accuracy≤0.1℃, and 0℃≤Temperature change rate accuracy≤0.1℃;

[0112] In the staring area, the adjustment amount is only used when the temperature difference and temperature change jointly identify a difference of 0.1°C, otherwise the adjustment amount is set to 0.

[0113] For the third-order regions divided into multidimensional fuzzy control tables, see Figure 2 shown.

[0114] In the above multidimensional fuzzy control table, when calculating the room temperature change rate in the general adjustment area, the interval time t is set to t0 time; when calculating the room temperature change rate in the rough adjustment area, the interval time t is set to 2t0 time; when calculating the room temperature change rate in the fine adjustment area, the interval time t is set to 3t0 time; when calculating the room temperature change rate in the staring area, the interval time t is set to 5t0 time. Wherein, t0 is a unit time, which can be 1 minute.

[0115] Since the multidimensional fuzzy control table is usually obtained by testing in a laboratory environment, and the outdoor temperature corresponding to the laboratory environment is usually different from the outdoor temperature of the actual use environment, if the multidimensional fuzzy control table obtained in the laboratory environment is directly used, there may be inaccurate control. Therefore, after obtaining the multidimensional fuzzy control table a in the laboratory environment, the embodiment stores the multidimensional fuzzy control table a in the air conditioner memory, and then corrects the fuzzy adjustment amount in the multidimensional fuzzy control table a according to the difference between the outdoor temperature of the actual use environment of the air conditioner and the outdoor temperature corresponding to the laboratory environment and the preset correction coefficient, to obtain the corrected multidimensional fuzzy control table b;

[0116] The correction formula is:

[0117] The adjustment amount in the multidimensional fuzzy control table b = k1 (the current actual outdoor temperature - the outdoor temperature corresponding to the laboratory environment) × the adjustment amount in the multidimensional fuzzy control table a;

[0118] Among them, k1 is the preset correction coefficient.

[0119] In order to facilitate the calculation of fuzzy amounts for fuzzy adjustment, a fuzzy adjustment amount proportionality mechanism is provided in each area of ​​the multidimensional fuzzy control table. When entering the fuzzy adjustment link, the base frequency Ff when entering the fuzzy adjustment stage is used as a reference to calculate the ratio Pr of each fuzzy adjustment amount to the base frequency. All fixed fuzzy adjustment amounts in the entire fuzzy control table are converted into corresponding Pr and stored in the system. When the fuzzy control amount is adjusted next time, the current real-time frequency Fr×Pr is used to obtain the corresponding fuzzy adjustment amount, and the fuzzy adjustment is performed with the corresponding fuzzy adjustment amount.

[0120] The fuzzy control table in the traditional solution is shown in Table 2 below. It can be seen that when controlling according to this fuzzy control table, it can only be adjusted with an accuracy of 1°C, which is easy to overshoot and waste energy. In contrast, the fuzzy control table in this solution can not only realize fuzzy control with conventional accuracy, but more importantly, it can realize multi-dimensional variable fuzzy control according to the actual environment, room load conditions, and load change trends, so as to achieve more refined temperature control, while improving user comfort, also reducing energy waste.

[0121] Table 2 Fuzzy control table in traditional scheme

[0122]

[0123] Finally, it should be noted that the above embodiments are only preferred implementations and are not intended to limit the present invention. It should be pointed out that for those skilled in the art, several modifications, equivalent replacements, improvements, etc. can be made without departing from the scope of the present invention and the scope of protection of the claims, and all of these should be included in the protection scope of the present invention.

Claims

1. An air conditioner segmented independent control method, applied to variable frequency air conditioners, characterized in that: The method includes: In the air-conditioning system, independent start-stop plans are set for various time periods and various scenarios, and independent parameter measurement and allocation are performed for each start-stop plan. During the operation of the air-conditioning, the air-conditioning system switches the start-stop plan according to the current environmental conditions and the preset switching trigger mechanism.

2. The air conditioning segmented independent control method according to claim 1, characterized in that: The multiple time periods are multiple time periods within a day; or different time periods in a week, a month, a season or a year.

3. The air conditioning segmented independent control method according to claim 1, characterized in that: The multiple time periods are daytime and nighttime, and independent start-stop schemes P1 and P2 are respectively set for the two scenarios of daytime and nighttime, and independent parameter measurement and allocation are performed for the two start-stop schemes, thereby forming a performance output interval C1 adapted to high load during the day and a performance output interval C2 adapted to low load at night; The performance output interval C1 is the same as the default performance interval of the air-conditioning system of this specification; the lower limit of the performance output interval C2 is lower than R0 and lower than the lower limit of the performance output interval C1; the upper limit of the performance output interval C2 is higher than the lower limit of the performance output interval C1; R0 is the average heat load value of the room throughout the day; During the operation of the air conditioner, the air conditioner system switches between the two start-stop schemes P1 and P2 according to the current environmental conditions and the preset switching trigger mechanism.

4. The air conditioning segmented independent control method according to claim 3, characterized in that: The switching trigger mechanism is a time period trigger, specifically: the air conditioner obtains the time after connecting to the Internet through the network module, and automatically triggers the judgment after reaching a preset time period, or, after the air conditioner is connected to the control unit, the clock module inside the air conditioner automatically obtains the time of the control unit and synchronizes the time, and automatically triggers the judgment after reaching a preset time period.

5. The air conditioning segmented independent control method according to claim 3, characterized in that: The switching trigger mechanism is a light-sensing trigger; specifically, a light-sensing sensor head provided on the air-conditioning panel or an external temperature and humidity sensor that wirelessly communicates with the air-conditioning detects the current light, and a triggering judgment is made by determining the light threshold.

6. The air conditioning segmented independent control method according to claim 3, characterized in that: The switching trigger mechanism is a noise trigger; specifically, a noise sensor is provided on an external temperature and humidity sensor based on wireless communication between the air conditioning panel and the air conditioner to detect noise, and a trigger determination is made by determining a noise threshold.

7. The air conditioning segmented independent control method according to claim 3, characterized in that: The switching trigger mechanism is infrared body sensing trigger; specifically, an infrared sensor arranged on an external temperature and humidity sensor based on wireless communication between the air conditioning panel and the air conditioner is used to detect the human body distance, and a trigger judgment is made by determining the human body distance threshold.

8. The air conditioning segmented independent control method according to claim 3, characterized in that: The switching trigger mechanism is a manual mode limited trigger, specifically: C2 is set to be an independent mode setting for selection in the air-conditioning control unit; or C2 is set to be hidden under other modes for manual selection.

9. The air conditioning segmented independent control method according to claim 3, characterized in that: The switching trigger mechanism is an overshoot trigger, specifically: when the air-conditioning system runs continuously at P1, after reaching the set time period, the system makes a judgment, and immediately switches to P2 when overshoot occurs for the first time.

10. The air conditioning segmented independent control method according to claim 3, characterized in that: During the execution of the start-stop plan P2, all operating parameters are revised for the second time, specifically: The performance output interval C2 is divided into multiple levels of sub-intervals. The operating parameters corresponding to the next level of sub-intervals are set by scaling based on the previous level of sub-intervals. When the air conditioner executes performance output in the current level of sub-interval, the environmental variables are introduced to determine whether the air conditioner enters the control of the next level of sub-interval.

11. The air conditioning segmented independent control method according to claim 3, characterized in that: The start-stop scheme includes: The system module is used to limit the air-conditioning system parameters in the performance output ranges C1 and C2, including the compressor frequency cf, the internal fan speed if, the external fan speed of, the expansion valve step number vs, and the fresh air fan speed af in any fixed operation link; the fixed operation link can be any link in the startup phase or the adjustment phase.

12. The air conditioning segmented independent control method according to claim 11, characterized in that: The start-stop scheme also includes: The process module is used to limit the air conditioning process parameters of the performance output intervals C1 and C2, including the start waiting time T1, the adjustment waiting time T2, and the frequency increase speed fs between the two operating links; the fixed operating link can be either the start link or the adjustment link.

13. The air conditioning segmented independent control method according to claim 12, characterized in that: The setting method of limiting the system parameters and process parameters is as follows: C1 is the default setting, and C2 is the fixed preset; or, the setting method of the system parameters and process parameters in C1 and C2 is to convert them according to the ratio T, C2 = C1 × T; the size of the ratio T is inversely proportional to the matching number of the model.

14. The air conditioning segmented independent control method according to claim 13, characterized in that: The start-stop scheme also includes: Function parameter module, which is used to limit the parameters of other auxiliary function components in the air-conditioning system except performance output, including: the brightness pb of the air-conditioning display panel, the buzzer volume bv, and the voice speaker volume sv; among them, all pb, bv, and sv in C2 use the same parameters of C1 as the basic value, and are steplessly adjusted according to the time difference ratio.

15. The air conditioning segmented independent control method according to claim 14, characterized in that: The start-stop scheme also includes: The temperature control module is used to limit the control parameters of the air-conditioning system when it enters the fuzzy control link; when the air-conditioning system enters the fuzzy control link: the C1 scheme is controlled according to the one-dimensional fuzzy control table A, and the table A is specifically a control table in which the temperature difference accuracy and the temperature change rate accuracy are exactly the same and are greater than 1°C; the C2 scheme is controlled according to the multidimensional fuzzy control table B; the table B is specifically a multidimensional fuzzy control table with table A as the parent area and a sub-area.

16. The air conditioning segmented independent control method according to claim 15, characterized in that: The temperature difference accuracy and temperature change rate accuracy of the mother area are limited to within ±3°C; The area where 3°C> temperature difference accuracy and temperature change rate accuracy>0.5°C is set as a general adjustment area; there are 4 general adjustment areas; the range of the sub-area is limited to the area other than the 4 general adjustment areas in the parent area; The temperature difference in the multidimensional fuzzy control table B is the set temperature minus the current indoor temperature; the temperature change rate in the multidimensional fuzzy control table B is (current indoor temperature minus the indoor temperature before the interval time t) ÷ the interval time t.

17. The air conditioning segmented independent control method according to claim 15, characterized in that: The sub-region can be adjusted by three-order fuzzy control, and the adjustment is performed according to the stages of coarse adjustment-fine adjustment-gaze. The temperature difference accuracy in the three stages becomes smaller and smaller, the temperature change rate accuracy becomes smaller and smaller, and the adjustment range becomes smaller and smaller.

18. The air conditioning segmented independent control method according to claim 17, characterized in that: In the three-stage adjustment of the sub-region of the multidimensional fuzzy control table, the temperature difference accuracy of the first stage is 1°C, and the adjustment range is 1HZ; the temperature difference accuracy of the second stage is 0.2°C, and the adjustment range is 0.2HZ; the temperature difference accuracy of the third stage is 0.1°C, and the adjustment range is 0.1HZ; In the sub-area, a micro-level adjustment amount is set, and the micro-level adjustment amount is limited to a multiple of 0.1HZ. The adjustment amount is set only when the temperature difference and temperature change are both identified to be 0.1°C and have the same sign, and the micro-level adjustment amount is set.

19. The air conditioning segmented independent control method according to claim 18, characterized in that: The first order of the sub-region is defined as the coarse adjustment region, specifically: The area where the temperature difference accuracy is less than 0.5°C and the temperature change rate accuracy is greater than 0.5°C is set as coarse adjustment area I, and there are 2 in total; The area where the temperature difference accuracy is greater than 0.5°C and the temperature change rate accuracy is less than 0.5°C is set as coarse adjustment area II, and there are 2 in total; In the coarse adjustment zone I, the maximum number of identical adjustment values ​​in any horizontal dimension is ≥4; in the coarse adjustment zone II, the maximum number of identical adjustment values ​​in any vertical dimension is ≥4.

20. The air conditioning segmented independent control method according to claim 18, characterized in that: The second order of the sub-region is defined as the fine tuning region, specifically: 0.1℃<temperature difference accuracy<0.5℃, and 0.1℃<temperature change rate accuracy<0.5℃; In the fine-tuning area, the maximum number of identical adjustments in any horizontal or vertical dimension is less than 4.

21. The air conditioning segmented independent control method according to claim 18, characterized in that: The third order of sub-areas is defined as the gaze area, specifically: 0℃≤Temperature difference accuracy≤0.1℃, and 0℃≤Temperature change rate accuracy≤0.1℃; In the staring area, the adjustment amount is only used when the temperature difference and temperature change jointly identify a difference of 0.1°C, otherwise the adjustment amount is set to 0.

22. The air conditioning segmented independent control method according to claim 15, characterized in that: In the multidimensional fuzzy control table, when calculating the room temperature change rates of the general adjustment area, the rough adjustment area, the fine adjustment area and the staring area, the setting amount of the interval time t increases in sequence.

23. The air conditioning segmented independent control method according to claim 22, characterized in that: When calculating the room temperature change rate in the general adjustment area, the interval time t is set to t0 time; when calculating the room temperature change rate in the coarse adjustment area, the interval time t is set to 2t0 time; when calculating the room temperature change rate in the fine adjustment area, the interval time t is set to 3t0 time; when calculating the room temperature change rate in the staring area, the interval time t is set to 5t0 time.

24. The air conditioning segmented independent control method according to claim 23, characterized in that: The t0 time is 1 minute.

25. The air conditioning segmented independent control method according to claim 15, characterized in that: The multidimensional fuzzy control table acquisition method includes: after obtaining the multidimensional fuzzy control table a in a laboratory environment, storing the multidimensional fuzzy control table a in an air conditioner memory, and then correcting the fuzzy adjustment amount in the multidimensional fuzzy control table a according to the difference between the outdoor temperature of the actual use environment of the air conditioner and the outdoor temperature corresponding to the laboratory environment and a preset correction coefficient, to obtain a corrected multidimensional fuzzy control table b; The correction formula is: The adjustment amount in the multidimensional fuzzy control table b = k1 (the current actual outdoor temperature - the outdoor temperature corresponding to the laboratory environment) × the adjustment amount in the multidimensional fuzzy control table a; Among them, k1 is the preset correction coefficient.

26. The air conditioning segmented independent control method according to any one of claims 15 to 25, characterized in that: A fuzzy adjustment amount proportionality mechanism is provided in each area of ​​the multidimensional fuzzy control table B. When entering the fuzzy adjustment link, the base frequency Ff when entering the fuzzy adjustment stage is used as a reference to calculate the ratio Pr of each fuzzy adjustment amount to the base frequency, and all fixed fuzzy adjustment amounts in the entire fuzzy control table are converted into corresponding Pr and stored in the system. When the fuzzy control amount is adjusted next time, the current real-time frequency Fr×Pr is used to obtain the corresponding fuzzy adjustment amount, and the fuzzy adjustment is performed with the corresponding fuzzy adjustment amount.

27. The air conditioning segmented independent control method according to any one of claims 15 to 25, characterized in that: In the third-order adjustment of the sub-area of ​​the multi-dimensional fuzzy control table, the minimum adjustment amount can reach 0.1HZ.

28. The air conditioning segmented independent control method according to claim 27, characterized in that: The control method with an adjustment amount of 0.1HZ is: In the temperature control software design, the temperature-resistance relationship table with a temperature interval of 1°C is converted into a temperature-AD sampling value relationship table with a temperature interval of 0.1°C; The indoor unit temperature sensor samples the current temperature of the internal resistor, and after AD conversion, the conversion result is looked up in a temperature-AD sampling value relationship table with a temperature interval of 0.1°C to obtain the current indoor temperature value. The current temperature of the internal resistor is the AD sampling value; The indoor unit MCU decodes the current indoor temperature setting value and transmits the indoor temperature setting value and the current indoor temperature value to the outdoor unit MCU; The outdoor unit MCU compares the indoor temperature setting value with the current indoor temperature value to obtain the temperature difference value, and controls the operation of the compressor according to the size of the temperature difference value with an integer multiple of 0.1Hz and a minimum frequency increment / decrement of 0.1HZ.

29. A variable frequency air conditioning device, comprising a processor and a memory, wherein a computer program is stored in the memory, wherein: The processor implements the air conditioning segmented independent control method as described in any one of claims 1-28 by executing the computer program.

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