Integrated control method and system of multi-connected air conditioner

Abstract

An integrated control method of a multi-connected air conditioner comprises the following steps that in a first period, control instructions received by all indoor units are counted, temperature change values of areas where the indoor units are located are accumulated according to the control instructions, and a total change value is obtained, the input time of the first regulation and control instruction is used as the starting time of the first period; the maximum exhaust air pressure is corrected according to the operation parameters to obtain the corrected air pressure, actual exhaust of the compressor can be better met through judgment of the corrected air pressure, and normal operation of the compressor is guaranteed. And when the actual air pressure is larger than the corrected air pressure, the frequency of the compressor needs to be reduced to reduce the actual air pressure, so that the actual air pressure can meet the exhaust requirement of the compressor, and the problem that when the multi-connected air conditioner conducts temperature control, an air conditioner outdoor unit crashes due to the exhaust pressure is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning control, and in particular to an integrated control method and system for a multi-connected air-conditioner. Background Art

[0002] Multi-split air conditioner, also known as multi-split air conditioning system, is an advanced central air conditioning system, which consists of a single refrigeration cycle system consisting of an air-cooled outdoor unit connected to several direct evaporative indoor units of different or same type and capacity. This system can directly provide processed air to one or several areas, achieving the purpose of delivering cold or hot air to each room.

[0003] In a multi-split air conditioner, one outdoor unit needs to be responsible for the air conditioning output of multiple areas (multiple indoor units), and when the air conditioner is just turned on, multiple areas need to be cooled down or heated up rapidly. At this time, it is necessary to increase the power of the outdoor unit compressor. At this time, the compressor is just starting up, and its internal air pressure is relatively unstable. If the power is increased to a large extent, the air pressure in the compressor will increase. When the air pressure is greater than the maximum exhaust pressure, the gas in the compressor will not be able to be discharged, causing damage to the compressor. Therefore, how to control the power of the multi-split air conditioner has become an urgent problem to be solved. Summary of the invention

[0004] In view of the above-mentioned defects, the purpose of the present invention is to propose an integrated control method and system for a multi-split air conditioner to solve the problem that the compressor frequency is difficult to control in the initial stage of starting the multi-split air conditioner.

[0005] To achieve this purpose, the present invention adopts the following technical solution: an integrated control method for a multi-connected air conditioner, comprising the following method:

[0006] In the first cycle, the control instructions received by all indoor units are counted, and the temperature change values ​​of the areas where the indoor units are located are accumulated according to the control instructions to obtain a total change value, wherein the temperature change value is obtained in the following manner: the indoor temperature of the area where the indoor units are located is obtained as the first temperature, the temperature to be adjusted by the control instruction is obtained as the second temperature, and the difference between the first temperature and the second temperature is used as the temperature change value, wherein the input time of the first control instruction after the outdoor unit is started is used as the starting time of the first first cycle;

[0007] Determine whether the total change value is greater than a temperature threshold; if so, obtain operating parameters of the compressor, and correct the maximum exhaust gas pressure of the compressor according to the operating parameters to obtain a corrected pressure;

[0008] The actual air pressure in the compressor is obtained, and it is determined whether the actual air pressure is greater than the corrected air pressure. If so, the frequency of the compressor is reduced; if not, the frequency of the compressor is maintained.

[0009] Preferably, the operating parameters include the initial temperature of the compressor, the temperature of the compressor after operation, and the humidity in the weather environment;

[0010] The method of obtaining the corrected air pressure is as follows:

[0011] Obtaining a temperature change rate of the compressor according to an initial temperature of the compressor, a temperature after the compressor is operated, and a second threshold time;

[0012] acquiring a humidity change rate in a compressor environment based on the temperature change rate;

[0013] The corrected air pressure is obtained through the temperature change rate, humidity change rate and the operating parameters of the compressor.

[0014] Preferably, the formula for obtaining the humidity change rate is as follows:

[0015]

[0016] Where D r is the temperature change rate, h is the humidity in the weather environment, A is the equivalent heat dissipation area of ​​the compressor surface, β is the influence coefficient of air convection on humidity in the environment, and ΔHH is the change in humidity of the environment where the compressor is located within the second threshold time.

[0017] Preferably, the steps for obtaining the corrected air pressure are as follows:

[0018] acquiring the ambient humidity of the compressor based on the humidity change rate, the humidity in the weather environment, and the second threshold time, and determining a value of the first adjustment coefficient based on the ambient humidity of the compressor;

[0019] Obtaining the intake air temperature of the compressor based on the temperature change rate, the initial gas temperature of the compressor, and the operating time;

[0020] Correcting the intake air temperature of the compressor according to the ambient humidity of the compressor to obtain a corrected temperature, and determining the value of the second adjustment coefficient according to the corrected temperature;

[0021] The formula for obtaining the corrected temperature is as follows:

[0022] T i =T+ω*H*(T-θ)-τ*T*H;

[0023] Where T is the intake temperature of the compressor, H is the ambient humidity of the compressor, ω and τ are adjustment parameters, and θ is a constant greater than zero;

[0024] The maximum exhaust gas pressure is multiplied by the first adjustment coefficient and the second adjustment coefficient to obtain a corrected gas pressure.

[0025] Preferably, the steps of reducing the frequency of the compressor are as follows:

[0026] Set the adjustment threshold;

[0027] Sort the temperature change values ​​of the areas where the indoor units are located;

[0028] Accumulate the temperature change values ​​from small to large until the total of the temperature change values ​​is greater than or equal to the adjustment threshold, and mark the area where the accumulated indoor unit is located as the first area;

[0029] Taking half of the temperature change value in the first area plus the indoor temperature as the temporary temperature, and replacing the user-specified temperature with the temporary temperature;

[0030] After a third threshold time, replacing the temporary temperature with the user-specified temperature;

[0031] The duration of the second threshold time plus the duration of the third threshold time equals the duration of the first cycle.

[0032] Preferably, the method further comprises the following steps:

[0033] Set the number of loops for the first cycle;

[0034] In non-first cycle regulation, obtaining the temperature change remaining amount of the first cycle;

[0035] The remaining temperature change is added to the temperature change value of the area where the control instruction is located in the first cycle to obtain the total change value;

[0036] The temperature change remaining amount is: after the first cycle ends, the difference between the first temperature and the second temperature of the area where the control instruction of the previous first cycle is located.

[0037] An integrated control system for a multi-connected air conditioner, using the integrated control method for a multi-connected air conditioner, comprising: a variation acquisition module, a correction module and a processing module;

[0038] The change amount acquisition module is used to count the temperature change values ​​of all the areas where the indoor units are located in the first cycle to obtain the total change value;

[0039] The correction module is used to determine whether the total change value is greater than a temperature threshold. If it is greater than the temperature threshold, the operating parameters of the compressor are obtained, and the maximum exhaust pressure of the compressor is corrected according to the operating parameters to obtain a corrected pressure.

[0040] The processing module is used to obtain the actual air pressure in the compressor, and determine whether the actual air pressure is greater than the corrected air pressure. If so, the frequency of the compressor is reduced; if so, the frequency of the compressor is maintained.

[0041] Preferably, the correction module comprises a gas correction submodule;

[0042] The gas correction submodule is used to obtain the temperature change rate of the compressor according to the initial temperature of the compressor, the temperature of the compressor after operation, and the second threshold time;

[0043] acquiring a humidity change rate in a compressor environment based on the temperature change rate;

[0044] The corrected air pressure is obtained through the temperature change rate, humidity change rate and the operating parameters of the compressor.

[0045] Preferably, the gas correction submodule includes a first coefficient acquisition unit, a second coefficient acquisition unit and an adjustment unit;

[0046] The first coefficient acquisition unit is used to acquire the ambient humidity of the compressor based on the humidity change rate, the humidity in the weather environment and the second threshold time, and determine the value of the first adjustment coefficient based on the ambient humidity of the compressor;

[0047] The second coefficient acquisition unit is used to acquire the intake temperature of the compressor based on the temperature change rate, the initial gas temperature of the compressor and the running time;

[0048] Correcting the intake air temperature of the compressor according to the ambient humidity of the compressor to obtain a corrected temperature, and determining the value of the second adjustment coefficient according to the corrected temperature;

[0049] The adjustment unit is used for performing correction according to the maximum exhaust gas pressure multiplied by the first adjustment coefficient and the second adjustment coefficient to obtain the corrected gas pressure.

[0050] Preferably, the processing module includes a frequency reduction submodule;

[0051] The frequency reduction submodule is used to set the adjustment threshold;

[0052] Sort the temperature change values ​​of the areas where the indoor units are located;

[0053] Accumulate the temperature change values ​​from small to large until the total of the temperature change values ​​is greater than or equal to the adjustment threshold, and mark the area where the accumulated indoor unit is located as the first area;

[0054] Taking half of the temperature change value in the first area plus the indoor temperature as the temporary temperature, and replacing the user-specified temperature with the temporary temperature;

[0055] After a third threshold time, replacing the temporary temperature with the user-specified temperature;

[0056] The duration of the second threshold time plus the duration of the third threshold time is equal to the duration of the first cycle. One of the above technical solutions has the following advantages or beneficial effects: when the total value of the change is greater than the temperature threshold, it means that the compressor needs to work at a high frequency. At this time, the exhaust pressure of the compressor will increase. When the actual air pressure is greater than the maximum exhaust air pressure, the compressor will be difficult to exhaust, which will cause the compressor to shut down. The maximum exhaust air pressure is usually obtained by the manufacturer through detection in a standard environment. However, the actual application scenario is different from the scenario during detection. In the actual scenario, it will be affected by the humidity, temperature and aging of the weather. If the maximum exhaust air pressure given by the manufacturer is used directly for control, it may cause equipment damage. For this reason, in the present invention, the maximum exhaust air pressure will be corrected according to the operating parameters to obtain the corrected air pressure. Judging by the corrected air pressure will be more in line with the actual exhaust of the compressor and ensure the normal operation of the compressor. When the actual air pressure is greater than the corrected air pressure, the frequency of the compressor needs to be reduced to reduce the actual air pressure so that the actual air pressure can meet the exhaust demand of the compressor, thereby solving the problem of the air conditioner outdoor unit freezing due to exhaust pressure when the multi-split air conditioner is performing temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 is a flow chart of an embodiment of the method of the present invention.

[0058] Figure 2 It is a schematic diagram of the structure of an embodiment of the system of the present invention. DETAILED DESCRIPTION

[0059] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0060] In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] like Figures 1-2 As shown, an integrated control method for a multi-connected air conditioner includes the following methods:

[0063] In the first cycle, the control instructions received by all indoor units are counted, and the temperature change values ​​of the areas where the indoor units are located are accumulated according to the control instructions to obtain a total change value, wherein the temperature change value is obtained in the following manner: the indoor temperature of the area where the indoor units are located is obtained as the first temperature, the temperature to be adjusted by the control instruction is obtained as the second temperature, and the difference between the first temperature and the second temperature is used as the temperature change value, wherein the input time of the first control instruction after the outdoor unit is started is used as the starting time of the first first cycle;

[0064] Determine whether the total change value is greater than a temperature threshold; if so, obtain operating parameters of the compressor, and correct the maximum exhaust gas pressure of the compressor according to the operating parameters to obtain a corrected pressure;

[0065] The actual air pressure in the compressor is obtained, and it is determined whether the actual air pressure is greater than the corrected air pressure. If so, the frequency of the compressor is reduced; if not, the frequency of the compressor is maintained.

[0066] In one embodiment, if there are four indoor unit areas A, B, C, and D, the first control instruction is issued at 10:10 in area A, the second control instruction is issued at 10:12 in area B, and the third control instruction is issued at 10:16 in area C.

[0067] The first cycle is 5 minutes. At this time, the temperature change values ​​of all the areas where the indoor units are located within 10:15 will be obtained. At this time, the temperature change values ​​of areas A and B are counted to get the total change value; and the temperature change value of area C is used in the next statistics. Specifically, if the indoor temperature of the area where the indoor unit A is located is 39°C, and the first control instruction is to adjust the temperature to 26°C, then the temperature change value of area A at this time is 39°C-26°C=13°C. Similarly, if the indoor temperature of the area where the indoor unit B is located is 37°C, and the first control instruction is to adjust the temperature to 27°C. Then the temperature change value of area A at this time is 10°C. Finally, the temperature change values ​​of areas A and B are accumulated to get a total change value of 23°C.

[0068] When the total value of the change is greater than the temperature threshold, it means that the compressor needs to work at a high frequency. At this time, the exhaust pressure of the compressor will increase. When the actual air pressure is greater than the maximum exhaust air pressure, the compressor will be difficult to exhaust, resulting in the compressor shutting down. The maximum exhaust air pressure is usually obtained by the manufacturer in a standard environment. However, the actual application scenario is different from the scenario during the detection. In the actual scenario, it will be affected by the humidity, temperature and aging of the weather. If the maximum exhaust air pressure given by the manufacturer is used directly for control, it may cause equipment damage. For this reason, in the present invention, the maximum exhaust air pressure will be corrected according to the operating parameters to obtain the corrected air pressure. Judging by the corrected air pressure will be more in line with the actual exhaust of the compressor and ensure the normal operation of the compressor. When the actual air pressure is greater than the corrected air pressure, it is necessary to reduce the frequency of the compressor to reduce the actual air pressure so that the actual air pressure can meet the exhaust demand of the compressor, thereby solving the problem that the air conditioner outdoor unit freezes due to the exhaust pressure when the multi-link air conditioner is performing temperature control.

[0069] Preferably, the operating parameters include the initial temperature of the compressor, the temperature of the compressor after operation, and the humidity in the weather environment;

[0070] The method of obtaining the corrected air pressure is as follows:

[0071] Obtaining a temperature change rate of the compressor according to an initial temperature of the compressor, a temperature after the compressor is operated, and a second threshold time;

[0072] The initial temperature of the compressor is the temperature obtained at the beginning of the first cycle, and the temperature after the compressor is running is the temperature from the beginning of the first cycle to the second threshold time. The specific temperature change rate is obtained by subtracting the initial temperature of the compressor from the temperature after the compressor is running, and then dividing it by the second threshold time.

[0073] acquiring a humidity change rate in a compressor environment based on the temperature change rate;

[0074] The corrected air pressure is obtained through the temperature change rate, humidity change rate and the operating parameters of the compressor.

[0075] In addition to temperature, there is another factor that affects the exhaust pressure: humidity. The compressor of a general air conditioner is placed outdoors. At this time, the compressor is greatly affected by the humidity of the external environment. At the same time, changes in temperature will also affect the humidity. Therefore, the rate of change of humidity cannot be obtained in a linear manner like the rate of change of temperature. For this reason, in the present invention, the rate of change of humidity in the compressor environment is obtained based on the temperature change rate. This method avoids the errors and inconveniences that may be caused by directly measuring humidity, and can reflect the dynamic changes of environmental humidity in real time. Improve the accuracy of the calculation.

[0076] This technical solution monitors the temperature change rate of the compressor in real time and indirectly obtains the humidity change rate in the environment to predict the maximum exhaust pressure of the compressor. It has the advantages of real-time, accuracy, intelligence, automation, cost control and maintenance optimization. These advantages jointly improve the operating efficiency and stability of the compressor and reduce maintenance costs and downtime risks.

[0077] It is worth mentioning that the duration of the second threshold time is shorter than the first cycle, generally 1 to 2 minutes. During this time, the air conditioner outdoor unit tends to be stable, and the data obtained at this time is more accurate.

[0078] Preferably, the formula for obtaining the humidity change rate is as follows:

[0079]

[0080] Where D r is the temperature change rate, h is the humidity in the weather environment, A is the equivalent heat dissipation area of ​​the compressor surface, β is the influence coefficient of air convection on humidity in the environment, and ΔH is the change in humidity of the environment where the compressor is located within the second threshold time.

[0081] The humidity in the weather environment can be obtained through meteorological data, and the humidity data displayed in the meteorological data is the humidity in the weather environment. ΔH is calculated through the humidity data obtained by the sensor. The humidity transmitted by the sensor is obtained at the start time of the second threshold time, and then the humidity transmitted by the sensor is obtained at the end time of the second threshold time. The two humidity data are subtracted to obtain the ΔH.

[0082] Preferably, the steps for obtaining the corrected air pressure are as follows:

[0083] acquiring the ambient humidity of the compressor based on the humidity change rate, the humidity in the weather environment, and the second threshold time, and determining a value of the first adjustment coefficient based on the ambient humidity of the compressor;

[0084] The ambient humidity of the compressor can be calculated through the humidity in the weather environment, the humidity change rate and the operating time. For example, the humidity in the weather environment is 70%, the humidity change rate is 0.25% / s, and the operating time is 2 minutes.

[0085] The ambient humidity of the compressor at this time is: 70%-0.25% / s*120=40%. Each range of ambient humidity of the compressor corresponds to a value of the first adjustment coefficient, for example, when the humidity is 0-10%, the corresponding value of the first adjustment coefficient is A1, and when the humidity is 10%-20%, the corresponding value of the first adjustment coefficient is A2, and so on.

[0086] Obtaining the intake air temperature of the compressor based on the temperature change rate, the initial gas temperature of the compressor, and the operating time;

[0087] Correcting the intake air temperature of the compressor according to the ambient humidity of the compressor to obtain a corrected temperature, and determining the value of the second adjustment coefficient according to the corrected temperature;

[0088] The formula for obtaining the corrected temperature is as follows:

[0089] T i =T+ω*H*(T-θ)-τ*T*H;

[0090] Where T is the intake temperature of the compressor, H is the ambient humidity of the compressor, ω and τ are adjustment parameters, and θ is a constant greater than zero;

[0091] The initial gas temperature of the compressor is the temperature when no control instruction is received. Then, the intake temperature of the compressor can be obtained through the temperature change rate and the running time. For example, the initial gas temperature of the compressor is 10°C, the temperature change rate is 0.5°C / s, and the running time is 2 minutes;

[0092] At this time, the intake temperature of the compressor is: (10℃+0.5℃ / s*120)*0.5=35℃. 0.5 is the adjustment parameter. However, the calculated intake temperature of the compressor is calculated by the temperature change rate of the external environment, and the reason for the external temperature change is that the temperature of the working place of the gas component of the compressor changes. In addition, the humidity of the air will also affect the propagation of external heat. Therefore, in the present invention, the intake temperature of the compressor will be corrected according to the ambient humidity of the compressor, so that the intake temperature can be close to the actual intake temperature.

[0093] Each corrected temperature interval of the compressor corresponds to a value of the second adjustment coefficient. For example, when the temperature is 10°C to 13°C, the corresponding value of the second adjustment coefficient is B1, and when the temperature is 13°C to 16°C, the corresponding value of the second adjustment coefficient is B2, and so on.

[0094] The maximum exhaust gas pressure is multiplied by the first adjustment coefficient and the second adjustment coefficient to obtain a corrected gas pressure.

[0095] Preferably, the steps of reducing the frequency of the compressor are as follows:

[0096] Set the adjustment threshold;

[0097] Sort the temperature change values ​​of the areas where the indoor units are located;

[0098] Accumulate the temperature change values ​​from small to large until the total of the temperature change values ​​is greater than or equal to the adjustment threshold, and mark the area where the accumulated indoor unit is located as the first area;

[0099] Taking half of the temperature change value in the first area plus the indoor temperature as the temporary temperature, and replacing the user-specified temperature with the temporary temperature;

[0100] After a third threshold time, replacing the temporary temperature with the user-specified temperature;

[0101] The duration of the second threshold time plus the duration of the third threshold time equals the duration of the first cycle.

[0102] The adjustment threshold is a temperature value given by human experience. In one embodiment, the adjustment threshold is 10°C. The temperature change values ​​of the area where the indoor unit is located are as follows: 12°C in area A, 10°C in area B, 8°C in area C, and 5°C in area D. At this time, the temperature change value of area D + area C is greater than 10°C, and area D + area C will be marked as the first area. If the indoor temperatures of area D and area C are 36°C and 38°C respectively, the temporary temperature of area D is 36-5 / 2=33.5°C, and the temporary temperature of area C is 38-8 / 2=34°C. Since the user's specified temperature is replaced by the temporary temperature, and the temporary temperature has a relatively small change relative to the specified temperature, the frequency of the compressor can be reduced at this time. Moreover, the adjustment is made in the direction of a smaller temperature change value. A smaller temperature change value indicates that the difference between the indoor temperature and the user-specified temperature is small, and the user's experience of temperature adjustment will not be so strong. At this time, the experience of people in the area (area A and area B) where the temperature needs to be adjusted quickly can be taken into account.

[0103] At the same time, the duration of the second threshold time plus the duration of the third threshold time equals the duration of the first cycle. After the third threshold time has passed, the next statistical work will be started, and a new temperature change instruction, i.e., a new control instruction, will be generated by replacing the temporary temperature with the user-specified temperature, and the temperature change of the first area can continue to be monitored.

[0104] Preferably, the method further comprises the following steps:

[0105] Set the number of loops for the first cycle;

[0106] In non-first cycle regulation, obtaining the temperature change remaining amount of the first cycle;

[0107] The remaining temperature change is added to the temperature change value of the area where the control instruction is located in the first cycle to obtain the total change value;

[0108] The temperature change remaining amount is: after the first cycle ends, the difference between the first temperature and the second temperature of the area where the control instruction of the previous first cycle is located.

[0109] Since the compressor tends to be stable after working, any temperature control instruction can be performed in a stable state. For this reason, the number of cycles of the first cycle needs to be set in the present invention. When the number of cycles meets the requirement, the compressor tends to be stable, and then the control is performed in a disorderly manner to reduce the computing power consumption of the control.

[0110] Since the temperature change value of some areas may be large during the adjustment in the previous first cycle, it may not be possible to adjust the indoor temperature of the area to the user-specified temperature through one first cycle. Therefore, when adjusting the next first cycle, it is necessary to consider the remaining temperature change in the previous first cycle. For example, the control instruction of area A is to adjust the temperature to 26°C. After the adjustment of the first cycle, the room temperature of area A drops from 39°C to 30°C. At this time, the remaining temperature change of area A is 30°C-26°C=4°C. Then the remaining temperature change is added to the temperature change value of the area where the control instruction is located in this first cycle to obtain the total change value.

[0111] An integrated control system for a multi-connected air conditioner, using the integrated control method for a multi-connected air conditioner, comprising: a variation acquisition module, a correction module and a processing module;

[0112] The change amount acquisition module is used to count the temperature change values ​​of all the areas where the indoor units are located in the first cycle to obtain the total change value;

[0113] The correction module is used to determine whether the total change value is greater than a temperature threshold. If it is greater than the temperature threshold, the operating parameters of the compressor are obtained, and the maximum exhaust pressure of the compressor is corrected according to the operating parameters to obtain a corrected pressure.

[0114] The processing module is used to obtain the actual air pressure in the compressor, and determine whether the actual air pressure is greater than the corrected air pressure. If so, the frequency of the compressor is reduced; if so, the frequency of the compressor is maintained.

[0115] Preferably, the correction module comprises a gas correction submodule;

[0116] The gas correction submodule is used to obtain the temperature change rate of the compressor according to the initial temperature of the compressor, the temperature of the compressor after operation, and the second threshold time;

[0117] acquiring a humidity change rate in a compressor environment based on the temperature change rate;

[0118] The corrected air pressure is obtained through the temperature change rate, humidity change rate and the operating parameters of the compressor.

[0119] Preferably, the gas correction submodule includes a first coefficient acquisition unit, a second coefficient acquisition unit and an adjustment unit;

[0120] The first coefficient acquisition unit is used to acquire the ambient humidity of the compressor based on the humidity change rate, the humidity in the weather environment and the second threshold time, and determine the value of the first adjustment coefficient based on the ambient humidity of the compressor;

[0121] The second coefficient acquisition unit is used to acquire the intake temperature of the compressor based on the temperature change rate, the initial gas temperature of the compressor and the running time;

[0122] Correcting the intake air temperature of the compressor according to the ambient humidity of the compressor to obtain a corrected temperature, and determining the value of the second adjustment coefficient according to the corrected temperature;

[0123] The adjustment unit is used for performing correction according to the maximum exhaust gas pressure multiplied by the first adjustment coefficient and the second adjustment coefficient to obtain the corrected gas pressure.

[0124] Preferably, the processing module includes a frequency reduction submodule;

[0125] The frequency reduction submodule is used to set the adjustment threshold;

[0126] Sort the temperature change values ​​of the areas where the indoor units are located;

[0127] Accumulate the temperature change values ​​from small to large until the total of the temperature change values ​​is greater than or equal to the adjustment threshold, and mark the area where the accumulated indoor unit is located as the first area;

[0128] Taking half of the temperature change value in the first area plus the indoor temperature as the temporary temperature, and replacing the user-specified temperature with the temporary temperature;

[0129] After a third threshold time, replacing the temporary temperature with the user-specified temperature;

[0130] The duration of the second threshold time plus the duration of the third threshold time equals the duration of the first cycle.

[0131] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0132] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An integrated control method for a multi-connected air conditioner, characterized in that: The following methods are included: In the first cycle, the control instructions received by all indoor units are counted, and the temperature change values ​​of the areas where the indoor units are located are accumulated according to the control instructions to obtain a total change value, wherein the temperature change value is obtained in the following manner: the indoor temperature of the area where the indoor units are located is obtained as the first temperature, the temperature to be adjusted by the control instruction is obtained as the second temperature, and the difference between the first temperature and the second temperature is used as the temperature change value, wherein the input time of the first control instruction after the outdoor unit is started is used as the starting time of the first first cycle; Determine whether the total change value is greater than a temperature threshold; if so, obtain operating parameters of the compressor, and correct the maximum exhaust gas pressure of the compressor according to the operating parameters to obtain a corrected pressure; The actual air pressure in the compressor is obtained, and it is determined whether the actual air pressure is greater than the corrected air pressure. If so, the frequency of the compressor is reduced; if not, the frequency of the compressor is maintained.

2. The integrated control method of a multi-connected air conditioner according to claim 1, characterized in that: The operating parameters include the initial temperature of the compressor, the temperature of the compressor after operation, and the humidity in the weather environment; The method of obtaining the corrected air pressure is as follows: Obtaining a temperature change rate of the compressor according to an initial temperature of the compressor, a temperature after the compressor is operated, and a second threshold time; acquiring a humidity change rate in a compressor environment based on the temperature change rate; The corrected air pressure is obtained through the temperature change rate, humidity change rate and the operating parameters of the compressor.

3. The integrated control method of a multi-connected air conditioner according to claim 2, characterized in that: The formula for obtaining the humidity change rate is as follows: Where D r is the temperature change rate, h is the humidity in the weather environment, A is the equivalent heat dissipation area of ​​the compressor surface, β is the influence coefficient of air convection on humidity in the environment, and ΔH is the change in humidity of the environment where the compressor is located within the second threshold time.

4. The integrated control method of a multi-connected air conditioner according to claim 2, characterized in that: The steps to obtain the corrected air pressure are as follows: acquiring the ambient humidity of the compressor based on the humidity change rate, the humidity in the weather environment, and the second threshold time, and determining a value of the first adjustment coefficient based on the ambient humidity of the compressor; Obtaining the intake air temperature of the compressor based on the temperature change rate, the initial gas temperature of the compressor, and the operating time; Correcting the intake air temperature of the compressor according to the ambient humidity of the compressor to obtain a corrected temperature, and determining the value of the second adjustment coefficient according to the corrected temperature; The formula for obtaining the corrected temperature is as follows: T i =T+ω*H*(T-θ)-τ*T*H; Where T is the intake temperature of the compressor, H is the ambient humidity of the compressor, ω and τ are adjustment parameters, and θ is a constant greater than zero; The maximum exhaust gas pressure is multiplied by the first adjustment coefficient and the second adjustment coefficient to obtain a corrected gas pressure.

5. The integrated control method of a multi-connected air conditioner according to claim 4, characterized in that: The steps to reduce the frequency of the compressor are as follows: Set the adjustment threshold; Sort the temperature change values ​​of the areas where the indoor units are located; Accumulate the temperature change values ​​from small to large until the total of the temperature change values ​​is greater than or equal to the adjustment threshold, and mark the area where the accumulated indoor unit is located as the first area; Taking half of the temperature change value in the first area plus the indoor temperature as the temporary temperature, and replacing the user-specified temperature with the temporary temperature; After a third threshold time, replacing the temporary temperature with the user-specified temperature; The duration of the second threshold time plus the duration of the third threshold time equals the duration of the first cycle.

6. The integrated control method of a multi-connected air conditioner according to claim 5, characterized in that: The following steps are also included: Set the number of loops for the first cycle; In non-first cycle regulation, obtaining the temperature change remaining amount of the first cycle; The remaining temperature change is added to the temperature change value of the area where the control instruction is located in the first cycle to obtain the total change value; The temperature change remaining amount is: after the first cycle ends, the difference between the first temperature and the second temperature of the area where the control instruction of the previous first cycle is located.

7. An integrated control system for a multi-split air conditioner, using the integrated control method for a multi-split air conditioner according to any one of claims 1 to 6, characterized in that: include: A variation acquisition module, a correction module and a processing module; The change amount acquisition module is used to count the temperature change values ​​of all the areas where the indoor units are located in the first cycle to obtain the total change value; The correction module is used to determine whether the total change value is greater than a temperature threshold. If it is greater than the temperature threshold, the operating parameters of the compressor are obtained, and the maximum exhaust pressure of the compressor is corrected according to the operating parameters to obtain a corrected pressure. The processing module is used to obtain the actual air pressure in the compressor, and determine whether the actual air pressure is greater than the corrected air pressure. If so, the frequency of the compressor is reduced; if so, the frequency of the compressor is maintained.

8. The integrated control system of a multi-connected air conditioner according to claim 7, characterized in that: The correction module includes a gas correction submodule; The gas correction submodule is used to obtain the temperature change rate of the compressor according to the initial temperature of the compressor, the temperature of the compressor after operation, and the second threshold time; acquiring a humidity change rate in a compressor environment based on the temperature change rate; The corrected air pressure is obtained through the temperature change rate, humidity change rate and the operating parameters of the compressor.

9. The integrated control system of a multi-connected air conditioner according to claim 8, characterized in that: The gas correction submodule includes a first coefficient acquisition unit, a second coefficient acquisition unit and an adjustment unit; The first coefficient acquisition unit is used to acquire the ambient humidity of the compressor based on the humidity change rate, the humidity in the weather environment and the second threshold time, and determine the value of the first adjustment coefficient based on the ambient humidity of the compressor; The second coefficient acquisition unit is used to acquire the intake temperature of the compressor based on the temperature change rate, the initial gas temperature of the compressor and the running time; Correcting the intake air temperature of the compressor according to the ambient humidity of the compressor to obtain a corrected temperature, and determining the value of the second adjustment coefficient according to the corrected temperature; The adjustment unit is used for performing correction according to the maximum exhaust gas pressure multiplied by the first adjustment coefficient and the second adjustment coefficient to obtain the corrected gas pressure.

10. The integrated control system of a multi-connected air conditioner according to claim 8, characterized in that: The processing module includes a frequency reduction submodule; The frequency reduction submodule is used to set the adjustment threshold; Sort the temperature change values ​​of the areas where the indoor units are located; Accumulate the temperature change values ​​from small to large until the total of the temperature change values ​​is greater than or equal to the adjustment threshold, and mark the area where the accumulated indoor unit is located as the first area; Taking half of the temperature change value in the first area plus the indoor temperature as the temporary temperature, and replacing the user-specified temperature with the temporary temperature; After a third threshold time, replacing the temporary temperature with the user-specified temperature; The duration of the second threshold time plus the duration of the third threshold time equals the duration of the first cycle.

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