Multi-connected air conditioner control method and device and electronic equipment
Patent Information
- Application Number
- CN202611307287.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-08-26
- Publication Date
- 2026-11-03
AI Technical Summary
In existing multi-split air conditioning control solutions, the compressor and electronic expansion valve respond independently based on the same temperature difference signal, resulting in drastic fluctuations in system pressure and stagnation of cooling in some rooms, leading to poor operational reliability and a poor user experience.
By calculating the ratio of the global desired temperature regulation rate to the global actual temperature regulation rate of the multi-split air conditioner, the compressor speed and the opening of the indoor unit's throttling device are adjusted to achieve decoupling control between the compressor and the throttling device, ensuring the stability of temperature regulation in each room.
It effectively suppressed drastic fluctuations in system pressure and local room cooling stagnation, improving the operational reliability and user experience of multi-split air conditioners.
Smart Images
Figure CN123028389A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of air conditioning technology, specifically to a multi-split air conditioning control method, device, and electronic equipment. Background Technology
[0002] Existing multi-split air conditioning control schemes often simply combine compressor frequency regulation and throttling device (such as electronic expansion valve) opening regulation as two independent logic modules. The compressor usually performs macroscopic frequency control based on some global deviation, while the throttling device of each indoor unit only performs isolated PID regulation based on the absolute temperature difference of its own room.
[0003] The current loosely coupled control method, where the compressor and electronic expansion valve respond independently based on the same temperature difference signal, can lead to uncontrolled responses from the compressor and throttling device when faced with extreme indoor load imbalances. This can cause severe coupling interference between the total flow output of the multi-split air conditioner and the local throttling of the throttling device, resulting in drastic fluctuations in system pressure and stagnation of temperature control in some rooms. Consequently, the multi-split air conditioner has poor operational reliability and a poor user experience. Summary of the Invention
[0004] This application provides a solution that, while taking into account the temperature control rate of each room, effectively suppresses the problem of drastic system pressure fluctuations and local room cooling stagnation caused by the compressor and electronic expansion valve responding independently based on the same temperature difference signal, thereby effectively improving the operational reliability of multi-split air conditioners and enhancing the user experience.
[0005] The embodiments of this application provide the following technical solutions: According to one embodiment of this application, a multi-split air conditioner control method is provided. The multi-split air conditioner includes a compressor and multiple indoor units that are turned on. Each indoor unit is equipped with a throttling device. The method includes: calculating the ratio of the global desired temperature adjustment rate to the global actual temperature adjustment rate of the multi-split air conditioner; calculating a target speed based on the ratio and the current speed of the compressor; subtracting the global temperature adjustment gap value from the local temperature adjustment gap value of each indoor unit to obtain a temperature adjustment progress deviation value for each indoor unit, wherein the global temperature adjustment gap value is the difference between the global desired temperature adjustment rate and the global actual temperature adjustment rate; adjusting the current opening degree of the throttling device of each indoor unit according to the temperature adjustment progress deviation value to obtain a target opening degree for each throttling device; controlling the compressor to run at the target speed and adjusting each throttling device to the corresponding target opening degree.
[0006] According to one embodiment of this application, a multi-split air conditioning control device is provided. The multi-split air conditioner includes a compressor and multiple indoor units that are turned on. Each indoor unit is equipped with a throttling device. The device includes: a ratio calculation module, which can be used to calculate the ratio between the global desired temperature adjustment rate and the global actual temperature adjustment rate of the multi-split air conditioner; a speed calculation module, which can be used to calculate a target speed based on the ratio and the current speed of the compressor; and a difference calculation module, which can be used to calculate the local temperature adjustment gap value of each indoor unit. Subtract the global temperature regulation gap value from each of the indoor units to obtain the temperature regulation progress deviation value of each of the indoor units. The global temperature regulation gap value is the difference between the global expected temperature regulation rate and the global actual temperature regulation rate. The opening adjustment module can be used to adjust the current opening of the throttling device of each indoor unit according to the temperature regulation progress deviation value of each of the indoor units to obtain the target opening of each throttling device. The system control module can be used to control the compressor to run at the target speed and adjust each throttling device to the corresponding target opening.
[0007] According to another embodiment of this application, a storage medium stores a computer program thereon, which, when executed by a processor of an electronic device, causes the electronic device to perform the methods described in the embodiments of this application.
[0008] According to another embodiment of this application, an electronic device may include: a memory storing a computer program; and a processor reading the computer program stored in the memory to execute the methods described in the embodiments of this application.
[0009] According to another embodiment of this application, a computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the methods provided in the various optional implementations described in the embodiments of this application.
[0010] In this embodiment, the ratio of the global desired temperature control rate to the global actual temperature control rate of the multi-split air conditioner is calculated; based on the rate ratio and the current speed of the compressor, the target speed is obtained; the local temperature control gap value of each operating indoor unit is subtracted from the global temperature control gap value to obtain the temperature control progress deviation value of each operating indoor unit, and the global temperature control gap value is the difference between the global desired temperature control rate and the global actual temperature control rate; according to the temperature control progress deviation value of each operating indoor unit, the current opening degree of the throttling device of each operating indoor unit is adjusted to obtain the target opening degree of each throttling device; the compressor is controlled to run at the target speed, and each throttling device is adjusted to the corresponding target opening degree.
[0011] The compressor speed is controlled based on the ratio of the global desired temperature control rate to the global actual temperature control rate. Furthermore, the opening degree of the throttling device in each operating indoor unit is adjusted according to the temperature control progress deviation of each unit. This allows the compressor speed to be adjusted based on the global deviation, while the opening degree of each operating indoor unit is adjusted based on the local relative deviation in a single room. This decouples the compressor's total flow output from the local throttling of each operating indoor unit. Overall, the compressor's total power supply and the electronic expansion valve's local distribution are separated yet linked. While maintaining the temperature control rate for each room, this effectively suppresses drastic system pressure fluctuations and localized cooling stagnation caused by the compressor and electronic expansion valve responding independently based on the same temperature difference signal. This significantly improves the operational reliability of multi-split air conditioners and enhances the user experience. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 A flowchart of a multi-split air conditioning control method according to an embodiment of this application is shown.
[0014] Figure 2 A flowchart illustrating the rotational speed calculation according to an embodiment of this application is shown.
[0015] Figure 3 A flowchart illustrating the opening adjustment process according to an embodiment of this application is shown.
[0016] Figure 4 A block diagram of a multi-split air conditioning control device according to an embodiment of this application is shown.
[0017] Figure 5 A block diagram of an electronic device according to an embodiment of this application is shown. Detailed Implementation
[0018] The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments provided herein are merely illustrative of the present disclosure and are not intended to limit the present disclosure. Furthermore, the embodiments provided below are some embodiments for implementing the present disclosure, and not all embodiments for implementing the present disclosure. Unless otherwise specified, the technical solutions described in the embodiments of the present disclosure can be implemented in any combination.
[0019] It should be noted that, in the embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a method or apparatus that includes a list of elements includes not only the elements expressly described, but also other elements not expressly listed, or elements inherent to implementing the method or apparatus. Without further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other related elements (e.g., steps in the method or units in the apparatus; for example, a unit may be a portion of circuitry, a portion of a processor, a portion of a program or software, etc.) in the method or apparatus that includes that element.
[0020] For example, the multi-split air conditioner control method provided in this disclosure includes a series of steps, but the multi-split air conditioner control method provided in this disclosure is not limited to the steps described. Similarly, the multi-split air conditioner control device provided in this disclosure includes a series of units, but the device provided in this disclosure is not limited to the units explicitly described, but may also include units that need to be set up for obtaining relevant information or processing based on information.
[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure.
[0022] It is understood that in the specific implementation of this application, relevant data is involved. When the embodiments in this application are applied to specific products or technologies, user permission or consent is required, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions.
[0023] Existing multi-split air conditioning control schemes often simply combine compressor frequency regulation and throttling device (such as electronic expansion valve) opening regulation as two independent logic modules. The compressor usually performs macroscopic frequency control based on some global deviation, while the throttling device of each indoor unit only performs isolated PID regulation based on the absolute temperature difference of its own room.
[0024] The current loosely coupled control method, where the compressor and electronic expansion valve respond independently based on the same temperature difference signal, can lead to uncontrolled responses from the compressor and throttling device when faced with extreme indoor load imbalances. This can cause severe coupling interference between the total flow output of the multi-split air conditioner and the local throttling of the throttling device, resulting in drastic fluctuations in system pressure and stagnation of cooling in some rooms. Consequently, the multi-split air conditioner has poor operational reliability and a poor user experience.
[0025] To address these issues, this application provides a multi-split air conditioning control solution that, while taking into account the temperature regulation rate of each room, effectively suppresses the problems of drastic system pressure fluctuations and local room cooling stagnation caused by the compressor and electronic expansion valve responding independently based on the same temperature difference signal. This effectively improves the operational reliability of the multi-split air conditioning system and enhances the user experience.
[0026] The following is a detailed description of the relevant embodiments of the multi-split air conditioning control scheme provided in this application.
[0027] Figure 1 A flowchart illustrating a multi-split air conditioner control method according to an embodiment of this application is shown. The execution entity of this multi-split air conditioner control method can be an electronic device or a server with processing capabilities. The electronic device can be the main control module of the multi-split air conditioner itself, a remote control, a wired controller, a mobile phone, a computer, a smartwatch, or other home appliances, etc., and the server can be a cloud server or a physical server, etc.
[0028] For example, in one embodiment of this application, the main control module of the multi-split air conditioner itself can be the executing entity of the control method. The main control module may include a processor and a memory, and the memory stores a computer program. Thus, the processor in the multi-split air conditioner can read the computer program stored in the memory to execute the methods of the various embodiments of this application.
[0029] A multi-split air conditioner includes a compressor and multiple indoor units corresponding to the compressor. These indoor units may further include one or more indoor units that are in an on / off state (i.e., powered-on indoor units), such as... Figure 1 As shown, the multi-split air conditioning control method may include steps S110 to S150.
[0030] Step S110: Calculate the ratio of the global actual temperature control rate to the global desired temperature control rate of the multi-split air conditioner. Step S120: Calculate the target speed based on the rate ratio and the current speed of the compressor; Step S130: Subtract the global temperature regulation gap value from the local temperature regulation gap value of each indoor unit that is turned on to obtain the temperature regulation progress deviation value of each indoor unit that is turned on. The global temperature regulation gap value is the difference between the global expected temperature regulation rate and the global actual temperature regulation rate. Step S140: Adjust the current opening of the throttling device of each indoor unit according to the temperature adjustment progress deviation value of each indoor unit to obtain the target opening of each throttling device. Step S150: Control the compressor to run at the target speed and adjust each throttling element to the corresponding target opening.
[0031] For multi-split air conditioners, adjustments can be made at fixed intervals. Control is performed according to the embodiments of this application, that is, the duration of each adjustment cycle is... At the end of the kth adjustment period, t_k (which is also the kth sampling time, t_k = k) Δt) can obtain the target frequency of the k+1th adjustment cycle and the target opening degree of the throttling device (such as electronic expansion valve) of each indoor unit in the manner described in the embodiments of this application, and control the compressor to operate at the target frequency in the k+1th adjustment cycle, and adjust the throttling device of each indoor unit in the k+1th adjustment cycle to the corresponding target opening degree.
[0032] First, at the end time t_k of the k-th adjustment cycle, the global desired temperature control rate of the multi-split air conditioner can be calculated. and global actual temperature adjustment rate rate ratio The global desired temperature control rate represents the overall temperature control rate (such as cooling or heating rate) required / expected to bring all rooms containing all operating indoor units to the desired temperature within the remaining control cycle. The global actual temperature control rate represents the actual overall temperature control rate (such as cooling or heating rate) of all rooms containing all operating indoor units.
[0033] In cooling mode, if the indoor temperature of a room with a particular indoor unit is less than or equal to the set temperature, then the room with that indoor unit is considered to have reached the set temperature. In heating mode, if the indoor temperature of a room with a particular indoor unit is greater than or equal to the set temperature, then the room with that indoor unit is considered to have reached the set temperature. The indoor temperature can be equal to the return air temperature.
[0034] The ratio of the global desired temperature regulation rate to the global actual temperature regulation rate reflects the deviation between the target temperature regulation progress required to achieve the temperature regulation target (i.e., to bring all indoor units to the desired temperature within the expected time) and the actual temperature regulation progress. In other words, it reflects the deviation between the compressor's current total power supply capacity and the target total power supply capacity required to achieve the temperature regulation target. Based on this ratio and the compressor's current speed (e.g., the compressor speed at time t_k), the target compressor speed that matches the compressor's power supply capacity with the target temperature regulation progress can be calculated.
[0035] Furthermore, the difference between the global desired temperature regulation rate and the global actual temperature regulation rate is calculated. This difference is the global temperature control gap value, which reflects the overall temperature control progress deviation / gap of the multi-split air conditioner system during temperature adjustment. The local temperature control gap value of the indoor unit reflects the temperature control progress deviation / gap in the room where that indoor unit is located. Subtracting the global temperature control gap value from the local temperature control gap value of each indoor unit yields the temperature control progress deviation value of each indoor unit. This deviation value reflects the progress deviation of the temperature control progress of a single room relative to the overall system temperature control progress.
[0036] For example, the temperature adjustment progress deviation value of the i-th indoor unit is equal to the local temperature adjustment gap value of the i-th indoor unit minus the global temperature adjustment gap value. The temperature adjustment progress deviation value of the i-th indoor unit reflects the progress deviation of the single-room temperature adjustment progress of the room where the i-th indoor unit is located relative to the overall system temperature adjustment progress. The temperature adjustment progress deviation value of the (i+1)-th indoor unit is equal to the local temperature adjustment gap value of the (i+1)-th indoor unit minus the global temperature adjustment gap value. The temperature adjustment progress deviation value of the (i+1)-th indoor unit reflects the progress deviation of the single-room temperature adjustment progress of the room where the (i+1)-th indoor unit is located relative to the overall system temperature adjustment progress.
[0037] The temperature adjustment progress deviation value can reflect the progress deviation of the temperature adjustment progress of a single room in which the indoor unit is located relative to the overall temperature adjustment progress of the system. Then, based on the temperature adjustment progress deviation value of each indoor unit, the current opening degree of the throttling device of each indoor unit (such as the opening degree of the throttling device at time t_k) is adjusted to obtain the target opening degree of the throttling device that can accurately compensate for the temperature adjustment progress deviation of each indoor unit. With this target opening degree, the refrigerant can be transferred from the room that cools down too quickly / has low demand to the room that cools down lagging / has high demand.
[0038] In the (k+1)th adjustment cycle, the compressor is controlled to run at the target speed, and each throttling device is adjusted to the corresponding target opening. By continuously performing this adjustment method once every adjustment cycle, the indoor units in the rooms where multiple indoor units are located can be precisely and synchronously adjusted to regulate the temperature. Based on the precise and synchronous temperature regulation of multiple indoor units, the target temperature regulation progress required to stably achieve the temperature regulation target (i.e., to make all rooms with indoor units reach the desired temperature within the expected time) can be effectively ensured, thus ensuring the temperature regulation rate of each room.
[0039] Furthermore, the compressor speed is adjusted based on the global deviation (i.e., the deviation between the target temperature adjustment progress required to achieve the temperature adjustment target and the actual temperature adjustment progress), while the opening degree of each indoor unit is adjusted based on the local relative deviation of a single room (i.e., the deviation between the temperature adjustment progress of the single room where the indoor unit is located and the overall temperature adjustment progress of the system). This decouples the total flow output of the compressor from the local throttling of the throttling devices of each indoor unit, effectively avoiding drastic fluctuations in system pressure and local room temperature stagnation caused by coupling interference, allowing for more stable and safer temperature control in each room.
[0040] In summary, this embodiment of the application regulates the compressor speed based on the ratio of the global desired temperature regulation rate to the global actual temperature regulation rate. Furthermore, it adjusts the current opening degree of the throttling device of each operating indoor unit according to the temperature regulation progress deviation value of each operating indoor unit. Thus, the compressor speed is adjusted according to the global deviation, while the opening degree of each operating indoor unit is adjusted according to the local relative deviation of a single room. This decouples the total flow output of the compressor from the local throttling of the throttling devices in each operating indoor unit. Overall, the compressor's total power supply and the electronic expansion valve's local distribution are separated yet linked. This effectively suppresses drastic system pressure fluctuations and local room cooling stagnation caused by the compressor and electronic expansion valve responding independently based on the same temperature difference signal, while considering the temperature regulation rate of each room. This effectively improves the operational reliability of multi-split air conditioners and enhances the user experience.
[0041] The following description Figure 1 Further optional specific embodiments for each step performed when controlling a multi-split air conditioner under the example.
[0042] In one embodiment, before calculating the ratio of the global desired temperature control rate to the global actual temperature control rate of the multi-split air conditioner in step S110, the method may further include: Based on formula and The global desired temperature regulation rate and the global actual temperature regulation rate are calculated; where, This refers to the global desired temperature control rate. This refers to the actual global temperature adjustment rate; The weight of the i-th indoor unit that is turned on. This represents the number of remaining adjustment cycles. This represents the actual temperature setting value of the room where the i-th indoor unit is located during the previous adjustment cycle.
[0043] in, , To adjust the total number of cycles, From total adjustment time and adjusting step size The total adjustment time can be set by the administrator. The total adjustment time represents the expected time for all rooms to reach the set temperature (i.e., the total time from the start of temperature adjustment (such as when a multi-split air conditioner is turned on) to the time when the indoor temperature of all rooms reaches the set temperature).
[0044] Based on formula The global desired temperature control rate is calculated by using the weight of the indoor units that are turned on and the number of remaining adjustment cycles through a weighted average method. The global desired temperature control rate, when characterizing the overall temperature control rate (such as cooling or heating rate) required / expected to bring all rooms with all operating indoor units to the desired temperature within the remaining regulation cycle, further considers the weight of each operating indoor unit, thus further improving the accuracy of the global desired temperature control rate. It can be understood that the global desired temperature control rate can be equivalent to the expected temperature control amount in the next regulation cycle.
[0045] Based on formula The global actual temperature regulation rate is calculated by using the weight of the indoor unit that is turned on and the actual temperature value of the room where the indoor unit is located in the previous regulation cycle through a weighted average method. When characterizing the actual overall temperature regulation rate (such as cooling rate or heating rate) of all rooms where all indoor units are turned on, the global actual temperature regulation rate can further consider the weight of each indoor unit turned on, which can further improve the accuracy of the global actual temperature regulation rate.
[0046] Optionally, in other embodiments, the global desired temperature adjustment rate of the multi-split air conditioner can be equal to "the sum of the desired temperature adjustment rates of all activated indoor units" divided by the total number of activated indoor units. The desired temperature adjustment rate of the i-th activated indoor unit can be equal to the temperature gap value of the room where the i-th activated indoor unit is located (i.e., the current indoor temperature minus the set temperature) divided by the number of remaining adjustment cycles. Optionally, in other embodiments, the global actual temperature adjustment rate of the multi-split air conditioner can be equal to... M represents the total number of all indoor units that are turned on.
[0047] Furthermore, in one embodiment, in cooling mode, the weight of the i-th indoor unit and the actual temperature value of the room where the i-th indoor unit is located in the previous adjustment cycle may specifically include: In the first case, when the current indoor temperature of the room where the i-th indoor unit is located is less than or equal to the set temperature, the weight is equal to the preset minimum constant, and the actual temperature adjustment value is equal to the temperature difference between the indoor temperature at the end and the beginning of the previous adjustment cycle. In the second scenario, when the current indoor temperature is greater than the set temperature and the temperature difference is less than or equal to zero, the weight is equal to the current indoor temperature minus the set temperature, and the actual temperature adjustment value is equal to the preset limit temperature. In the third case, if the above two conditions are not met, the weight is equal to the current indoor temperature minus the set temperature, and the actual temperature adjustment value is equal to the temperature difference.
[0048] In the first case hour, , ,in, This refers to the current indoor temperature of the room where the i-th indoor unit is located. The set temperature for the room where the i-th indoor unit is located. Let i be the weight of the i-th indoor unit that is turned on. It is a preset minimum constant (i.e., a preset minimum constant). This represents the actual temperature setting value of the room where the i-th indoor unit is located during the previous adjustment cycle. It equals the temperature difference between the indoor temperature at the end and the beginning of the previous adjustment cycle. , The indoor temperature at the end of the previous adjustment cycle. (The indoor temperature at the start of the previous adjustment cycle).
[0049] In cooling mode At this time, it can be determined that the room where the i-th indoor unit is turned on is an abnormally cold room. (The weight of the i-th indoor unit that is turned on will be adjusted to a preset minimum constant), and (That is, the actual temperature setting value of the i-th indoor unit remains true) This can reduce the weight of indoor units in abnormally cold rooms, thereby reducing the impact of such indoor units on the calculation of the global expected temperature regulation rate and the global actual temperature regulation rate, and preventing them from continuing to occupy refrigerant allocation slots.
[0050] In the second case and When the i-th indoor unit is in a room with abnormal cooling stagnation, it can be determined that the room is the one where the cooling is stagnant. (That is, the temperature difference between the current indoor temperature and the set temperature is used as the weight). (That is, the actual temperature adjustment value of the i-th indoor unit is corrected to a preset limit temperature (such as the lower limit of temperature reduction)). Appropriate weights can be set for indoor units in rooms with abnormal cooling stagnation, and appropriate actual temperature adjustment can be set to avoid the calculation of abnormal actual temperature adjustment values caused by cooling affecting the accuracy of the calculation of global expected temperature adjustment rate and global actual temperature adjustment rate.
[0051] In the third scenario, if neither of the above two conditions is met (i.e., neither the first nor the second condition is met), the room where the i-th indoor unit is located can be determined as a room undergoing normal cooling. , Therefore, the weights are still allocated according to how far away from the target, and the rooms that are cooling down normally retain the true value. To ensure control sensitivity.
[0052] See Figure 2 In one embodiment, step S120, calculating the target speed based on the rate ratio and the current speed of the compressor, may include: step S210, multiplying the rate ratio by the current speed to obtain the base speed; step S220, smoothing the base speed and the current speed to obtain the smoothed speed; and step S230, obtaining the target speed based on the smoothed speed.
[0053] Specifically, , That is, the rate ratio. That is, the current speed (such as the compressor speed at the end of the kth adjustment cycle, t_k). That is, the base speed. Further analysis of the base speed... Compared with the current speed The smoothed speed is obtained by performing a smoothing process, and the target speed is obtained based on the smoothed speed, which can further ensure smooth speed control.
[0054] Alternatively, in other embodiments, the base rotational speed can be... The target speed can be determined. Alternatively, the smoothed speed can be determined as the target speed.
[0055] The base speed and the current speed are smoothed to obtain the smoothed speed. Specifically, this can be done by: ,in, That is, the speed after smoothing. This refers to the compressor speed adjustment learning rate (i.e., the preset adjustment coefficient).
[0056] Furthermore, in one embodiment, obtaining the target speed based on the smoothed speed may specifically include: determining the maximum speed between the smoothed speed and the first speed; determining the minimum speed between the maximum speed and the second speed; wherein the minimum speed is equal to the target speed, the first speed is equal to the current speed multiplied by the first anti-mutation coefficient, the second speed is equal to the current speed multiplied by the second anti-mutation coefficient, the first anti-mutation coefficient is less than one, and the second anti-mutation coefficient is greater than one.
[0057] Specifically, 'min' represents the minimum value, 'max' represents the maximum value, 'a' is the first anti-sudden change coefficient, and 'b' is the second anti-sudden change coefficient. 'a' and 'b' can respectively characterize the maximum safe percentage boundaries for adjusting the compressor's single-run frequency downwards and upwards. Based on this implementation method, the target speed is obtained from the smoothed speed, which further ensures the safety of compressor speed regulation. 'a' and 'b' can be preset according to actual conditions; in one example, 'a' = 0.7 and 'b' = 1.3.
[0058] In one embodiment, in step S130, the local temperature adjustment gap value of each indoor unit is subtracted from the global temperature adjustment gap value to obtain the temperature adjustment progress deviation value of each indoor unit. Specifically, this can be: ,in, That is, the global temperature control gap value. That is, the local temperature regulation gap value of the i-th indoor unit that is turned on.
[0059] in, , As the local temperature adjustment gap value of the i-th indoor unit, it can accurately reflect the temperature adjustment progress deviation / gap in the room where the i-th indoor unit is located. It can accurately reflect the progress deviation of the temperature adjustment progress of a single room in the room where the i-th indoor unit is located relative to the overall temperature adjustment progress of the system.
[0060] See Figure 3 In one embodiment, step S140, adjusting the current opening of the throttling device of each indoor unit based on the temperature adjustment progress deviation value of each indoor unit, to obtain the target opening of each throttling device, may include: step S310, multiplying the temperature adjustment progress deviation value of the i-th indoor unit, the current opening, and a preset coefficient to obtain the adjusted opening; step S320, adding the adjusted opening to the current opening to obtain the superimposed opening; and step S330, obtaining the target opening of the i-th indoor unit based on the superimposed opening.
[0061] Specifically, ,in, That is, the current opening degree (the opening degree of the throttling device of the i-th indoor unit at the end time t_k of the k-th adjustment cycle). That is, the preset coefficient (i.e., the preset learning rate for adjusting the opening of the electronic expansion valve). That is, adjust the opening. That is, the superimposed opening degree of the throttling device of the i-th indoor unit. According to this implementation method, the superimposed opening degree is obtained by compensating the current opening degree by introducing a preset coefficient and a temperature adjustment progress deviation value, and the target opening degree of the i-th indoor unit is obtained based on the superimposed opening degree.
[0062] Optionally, in one embodiment, obtaining the target opening degree of the i-th indoor unit based on the superimposed opening degree can be: determining the superimposed opening degree of the throttling device of the i-th indoor unit as the target opening degree of the i-th indoor unit.
[0063] In one embodiment, the target opening degree of the i-th indoor unit is obtained based on the superimposed opening degree, which may specifically include: determining the minimum opening degree between the superimposed opening degree and the upper limit opening degree; determining the maximum opening degree between the minimum opening degree and the lower limit opening degree, wherein the maximum opening degree is equal to the target opening degree.
[0064] Specifically, Where min represents the minimum value and max represents the maximum value. That is, the upper limit opening. This refers to the lower limit opening, from which the final target opening can be further determined. It is within the safe opening range.
[0065] Optionally, in one embodiment, the upper limit opening degree and the lower limit opening degree can be opening degrees that are preset according to actual conditions.
[0066] Furthermore, in one embodiment, before obtaining the target opening degree of the i-th indoor unit based on the superimposed opening degree, the following may be included: exist hour, ; exist hour, ; exist hour, ; exist hour, ; in, Let be the inlet pipe temperature of the heat exchanger of the i-th indoor unit that is turned on. To preset the antifreeze protection threshold, To meet the minimum opening requirements for oil return, To preset the antifreeze adjustment coefficient, This is the lower limit of the opening. Let be the overheat of the i-th indoor unit that is turned on. To preset the liquid impact protection threshold, For the current opening, To preset the attenuation opening, For the maximum allowable opening, This is the upper limit of the opening.
[0067] In this embodiment, the upper and lower limits of the opening degree of each indoor unit are dynamically adjusted. Specifically, this is based on the inlet pipe temperature of the heat exchanger of the i-th indoor unit. (e.g., the inlet pipe temperature at the end of the kth adjustment cycle t_k) and the superheat of the i-th indoor unit during startup. (in, , Let the outlet pipe temperature of the heat exchanger of the i-th indoor unit be (e.g., the outlet pipe temperature at the end of the k-th adjustment cycle t_k). The upper limit and lower limit of the opening of the i-th indoor unit are dynamically determined according to the different situations mentioned above.
[0068] in, To meet the minimum opening requirement for oil return, at hour, This ensures that the compressor's minimum oil return requirement is met. The minimum opening degree for oil return is the preset minimum opening degree that satisfies the compressor's oil return requirement. The minimum opening degree for oil return can be set according to actual conditions, and this application does not impose any special limitations.
[0069] in, To preset the antifreeze protection threshold, To preset the antifreeze adjustment coefficient, in This indicates a risk of being frozen. This can effectively protect pipelines from freezing. The preset antifreeze protection threshold and preset antifreeze adjustment coefficient can be set according to actual conditions; this application does not impose any special limitations on these settings.
[0070] in, To preset the attenuation opening, in This indicates a risk of liquid impact. Under liquid hammer conditions, the opening of the throttling device is forcibly reduced to a preset reduction opening degree. This effectively provides protection against liquid impact. The preset attenuation setting can be set according to actual conditions; this application does not impose any special limitations on it.
[0071] also, To preset the liquid impact protection threshold, Both of these thresholds can be set according to actual conditions, and this application does not impose any special limitations on them.
[0072] To facilitate better implementation of the multi-split air conditioning control method provided in this application, this application also provides a multi-split air conditioning control device based on the above-described multi-split air conditioning control method. The meanings of the terms used are the same as in the above-described multi-split air conditioning control method, and specific implementation details can be found in the descriptions within the method embodiments. Figure 4 A block diagram of a multi-split air conditioning control device according to an embodiment of this application is shown.
[0073] like Figure 4As shown, the multi-split air conditioning control device 400 may include: a ratio calculation module 410, which can be used to calculate the ratio between the global desired temperature adjustment rate and the global actual temperature adjustment rate of the multi-split air conditioning; a speed calculation module 420, which can be used to calculate the target speed based on the ratio and the current speed of the compressor; a difference calculation module 430, which can be used to subtract the global temperature adjustment gap value from the local temperature adjustment gap value of each of the operating indoor units to obtain the temperature adjustment progress deviation value of each of the operating indoor units, wherein the global temperature adjustment gap value is the difference between the global desired temperature adjustment rate and the global actual temperature adjustment rate; an opening adjustment module 440, which can be used to adjust the current opening of the throttling device of each of the operating indoor units according to the temperature adjustment progress deviation value of each of the operating indoor units to obtain the target opening of each of the throttling devices; and a system control module 450, which can be used to control the compressor to run at the target speed and adjust each of the throttling devices to the corresponding target opening.
[0074] In one embodiment, when calculating the target speed based on the rate ratio and the current speed of the compressor, the speed calculation module 420 can be used to: multiply the rate ratio by the current speed to obtain the base speed; smooth the base speed and the current speed to obtain the smoothed speed; and obtain the target speed based on the smoothed speed.
[0075] In one embodiment, when obtaining the target speed based on the smoothed speed, the speed calculation module 420 can be used to: determine the maximum speed between the smoothed speed and the first speed; determine the minimum speed between the maximum speed and the second speed; wherein the minimum speed is equal to the target speed, the first speed is equal to the current speed multiplied by the first anti-mutation coefficient, the second speed is equal to the current speed multiplied by the second anti-mutation coefficient, the first anti-mutation coefficient is less than one, and the second anti-mutation coefficient is greater than one.
[0076] In one embodiment, when adjusting the current opening degree of the throttling device of each of the indoor units based on the temperature adjustment progress deviation value of each of the indoor units to obtain the target opening degree of each throttling device, the opening degree adjustment module 440 can be used to: multiply the temperature adjustment progress deviation value of the i-th indoor unit, the current opening degree, and a preset coefficient to obtain the adjusted opening degree; add the adjusted opening degree to the current opening degree to obtain the superimposed opening degree; and obtain the target opening degree of the i-th indoor unit based on the superimposed opening degree.
[0077] In one embodiment, when obtaining the target opening degree of the i-th indoor unit based on the superimposed opening degree, the opening degree adjustment module 440 can be used to: determine the minimum opening degree among the superimposed opening degree and the upper limit opening degree; determine the maximum opening degree among the minimum opening degree and the lower limit opening degree, wherein the maximum opening degree is equal to the target opening degree.
[0078] In one embodiment, before obtaining the target opening degree of the i-th indoor unit based on the superimposed opening degree, the device further includes a boundary determination module that can be used to: exist hour, ; exist hour, ; exist hour, ; exist hour, ; in, Let be the inlet pipe temperature of the heat exchanger of the i-th indoor unit that is turned on. To preset the antifreeze protection threshold, To meet the minimum opening requirements for oil return, To preset the antifreeze adjustment coefficient, The lower limit opening degree; The superheat of the i-th indoor unit that is turned on. To preset the liquid impact protection threshold, For the current opening degree, To preset the attenuation opening, For the maximum allowable opening, The upper limit opening is given.
[0079] In one embodiment, before calculating the ratio of the global desired temperature control rate to the global actual temperature control rate of the multi-split air conditioner, the device further includes a rate determination module that can be used to: Based on formula and The global desired temperature control rate and the global actual temperature control rate are calculated; wherein, This refers to the global desired temperature control rate. This refers to the actual global temperature adjustment rate; The weight of the i-th indoor unit that is turned on. This represents the number of remaining adjustment cycles. The actual temperature setting value of the room where the i-th indoor unit is located in the previous adjustment cycle.
[0080] In one embodiment, in cooling mode, the weight of the i-th indoor unit and the actual temperature value of the room where the i-th indoor unit is located in the previous adjustment cycle include: when the current indoor temperature of the room where the i-th indoor unit is located is less than or equal to the set temperature, the weight is equal to a preset minimum constant, and the actual temperature value is equal to the temperature difference between the indoor temperatures at the end and start of the previous adjustment cycle; when the current indoor temperature is greater than the set temperature, and the temperature difference is less than or equal to zero, the weight is equal to the current indoor temperature minus the set temperature, and the actual temperature value is equal to a preset limit temperature; when neither of the above two conditions is met, the weight is equal to the current indoor temperature minus the set temperature, and the actual temperature value is equal to the temperature difference.
[0081] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.
[0082] Furthermore, embodiments of this application also provide an electronic device, such as... Figure 5 As shown, Figure 5 A block diagram of an electronic device according to an embodiment of this application is shown, specifically: The electronic device may include components such as a processor 501 with one or more processing cores, a memory 502 with one or more computer-readable storage media, a power supply 503, and an input unit 504. Those skilled in the art will understand that... Figure 5 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein: The processor 501 is the control center of the electronic device, connecting various parts of the computer device via various interfaces and lines. It executes software programs and / or modules stored in the memory 502, and calls data stored in the memory 502, to perform various functions of the computer device and process data. Optionally, the processor 501 may include one or more processing cores; preferably, the processor 501 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user page, and application programs, and the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 501.
[0083] The memory 502 can be used to store software programs and modules. The processor 501 executes various functional applications and data processing by running the software programs and modules stored in the memory 502. The memory 502 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 502 may also include a memory controller to provide the processor 501 with access to the memory 502.
[0084] The electronic device also includes a power supply 503 that supplies power to various components. Preferably, the power supply 503 can be logically connected to the processor 501 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 503 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.
[0085] The electronic device may also include an input unit 504, which can be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.
[0086] Although not shown, the electronic device may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 501 in the electronic device can load the executable files corresponding to the processes of one or more computer programs into the memory 502 according to the following instructions, and the processor 501 runs the computer programs stored in the memory 502, thereby realizing the various functions in the foregoing embodiments of this application.
[0087] For example, processor 501 can execute the following: calculate the ratio of the global desired temperature adjustment rate to the global actual temperature adjustment rate of the multi-split air conditioner; calculate the target speed based on the ratio and the current speed of the compressor; subtract the global temperature adjustment gap value from the local temperature adjustment gap value of each of the indoor units in operation to obtain the temperature adjustment progress deviation value of each of the indoor units in operation, wherein the global temperature adjustment gap value is the difference between the global desired temperature adjustment rate and the global actual temperature adjustment rate; adjust the current opening of the throttling device of each indoor unit in operation according to the temperature adjustment progress deviation value of each indoor unit in operation to obtain the target opening of each throttling device; control the compressor to run at the target speed, and adjust each throttling device to the corresponding target opening.
[0088] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by a computer program, or by a computer program controlling related hardware. The computer program can be stored in a computer-readable storage medium and loaded and executed by a processor.
[0089] Therefore, embodiments of this application also provide a storage medium storing a computer program that can be loaded by a processor to execute the steps in any of the methods provided in embodiments of this application.
[0090] The storage medium can be a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.
[0091] Since the computer program stored in the storage medium can execute the steps of any of the methods provided in the embodiments of this application, the beneficial effects that the methods provided in the embodiments of this application can achieve can be realized. For details, please refer to the previous embodiments, which will not be repeated here.
[0092] According to another embodiment of this application, a computer program product or computer program includes computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the methods provided in the various optional implementations described in the embodiments of this application.
[0093] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.
[0094] It should be understood that this application is not limited to the embodiments described above and shown in the accompanying drawings, but various modifications and changes can be made without departing from its scope.
Claims
1. A method for controlling a multi-split air conditioning system, characterized in that, The multi-split air conditioner includes a compressor and multiple indoor units that are turned on, each of which is equipped with a throttling device. The method includes: Calculate the ratio of the global desired temperature adjustment rate to the global actual temperature adjustment rate of the multi-split air conditioner; The target speed is obtained by calculating based on the rate ratio and the current speed of the compressor; Subtract the global temperature adjustment gap value from the local temperature adjustment gap value of each of the indoor units that are turned on to obtain the temperature adjustment progress deviation value of each of the indoor units that are turned on. The global temperature adjustment gap value is the difference between the global expected temperature adjustment rate and the global actual temperature adjustment rate. Based on the temperature adjustment progress deviation value of each of the indoor units, the current opening degree of the throttling device of each indoor unit is adjusted to obtain the target opening degree of each throttling device. The compressor is controlled to operate at the target speed, and each of the throttling elements is adjusted to the corresponding target opening.
2. The method according to claim 1, characterized in that, The calculation of the target speed based on the rate ratio and the current speed of the compressor includes: Multiply the rate ratio by the current rotational speed to obtain the base rotational speed; The base speed and the current speed are smoothed to obtain a smoothed speed. The target rotational speed is obtained based on the smoothed rotational speed.
3. The method according to claim 2, characterized in that, The step of obtaining the target rotational speed based on the smoothed rotational speed includes: Determine the maximum speed between the smoothed speed and the first speed; Determine the minimum speed between the maximum speed and the second speed; Wherein, the minimum rotational speed is equal to the target rotational speed, the first rotational speed is equal to the current rotational speed multiplied by the first anti-mutation coefficient, the second rotational speed is equal to the current rotational speed multiplied by the second anti-mutation coefficient, the first anti-mutation coefficient is less than one, and the second anti-mutation coefficient is greater than one.
4. The method according to claim 1, characterized in that, The step of adjusting the current opening degree of the throttling device of each of the indoor units based on the temperature adjustment progress deviation value of each of the indoor units to obtain the target opening degree of each throttling device includes: The temperature adjustment progress deviation value of the i-th indoor unit, the current opening degree, and the preset coefficient are multiplied together to obtain the adjustment opening degree; The adjusted opening is added to the current opening to obtain the superimposed opening; The target opening degree of the i-th indoor unit is obtained based on the superimposed opening degree.
5. The method according to claim 4, characterized in that, The step of obtaining the target opening degree of the i-th indoor unit based on the superimposed opening degree includes: Determine the minimum opening between the superimposed opening and the upper limit opening; Determine the maximum opening between the minimum opening and the lower limit opening, wherein the maximum opening is equal to the target opening.
6. The method according to claim 5, characterized in that, Before obtaining the target opening degree of the i-th indoor unit based on the superimposed opening degree, the method further includes: exist hour, ; exist hour, ; exist hour, ; exist hour, ; in, Let be the inlet pipe temperature of the heat exchanger of the i-th indoor unit that is turned on. To preset the antifreeze protection threshold, To meet the minimum opening requirements for oil return, To preset the antifreeze adjustment coefficient, The lower limit opening degree; The superheat of the i-th indoor unit that is turned on. To preset the liquid impact protection threshold, For the current opening degree, To preset the attenuation opening, For the maximum allowable opening, The upper limit opening is given.
7. The method according to any one of claims 1 to 6, characterized in that, Before calculating the ratio of the global desired temperature control rate to the global actual temperature control rate of the multi-split air conditioner, the method further includes: Based on formula and The global desired temperature control rate and the global actual temperature control rate are calculated; wherein, This refers to the global desired temperature control rate. This refers to the actual global temperature adjustment rate; The weight of the i-th indoor unit that is turned on. This represents the number of remaining adjustment cycles. The actual temperature setting value of the room where the i-th indoor unit is located in the previous adjustment cycle.
8. The method according to claim 7, characterized in that, In cooling mode, the weight of the i-th indoor unit and the actual temperature value of the room where the i-th indoor unit is located in the previous adjustment cycle include: When the current indoor temperature of the room where the i-th indoor unit is located is less than or equal to the set temperature, the weight is equal to a preset minimum constant, and the actual temperature adjustment value is equal to the temperature difference between the indoor temperature at the end and the beginning of the previous adjustment cycle. When the current indoor temperature is greater than the set temperature and the temperature difference is less than or equal to zero, the weight is equal to the current indoor temperature minus the set temperature, and the actual temperature adjustment value is equal to the preset limit temperature. If neither of the above two conditions is met, the weight is equal to the current indoor temperature minus the set temperature, and the actual temperature adjustment value is equal to the temperature difference.
9. A multi-split air conditioning control device, characterized in that, The multi-split air conditioner includes a compressor and multiple indoor units that are turned on. Each indoor unit is equipped with a throttling device. The device includes: The ratio calculation module is used to calculate the ratio of the global desired temperature adjustment rate to the global actual temperature adjustment rate of the multi-split air conditioner. The speed calculation module is used to: calculate the target speed based on the rate ratio and the current speed of the compressor; The difference calculation module is used to: subtract the global temperature adjustment gap value from the local temperature adjustment gap value of each of the indoor units that are turned on, to obtain the temperature adjustment progress deviation value of each of the indoor units that are turned on, wherein the global temperature adjustment gap value is the difference between the global expected temperature adjustment rate and the global actual temperature adjustment rate. The opening adjustment module is used to: adjust the current opening of the throttling device of each of the indoor units based on the temperature adjustment progress deviation value of each of the indoor units, so as to obtain the target opening of each throttling device; The system control module is used to: control the compressor to run at the target speed, and adjust each of the throttling elements to the corresponding target opening degree.
10. An electronic device, characterized in that, include: Memory, which stores computer programs; A processor reads a computer program stored in memory to perform the method described in any one of claims 1 to 8.