Air conditioning system and control method and apparatus therefor, and non-volatile storage medium
Patent Information
- Application Number
- PCT/CN2025/130296
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-03-26
- Filing Date
- 2025-10-27
- Publication Date
- 2026-10-01
Smart Images
Figure CN2025130296_01102026_PF_FP_ABST
Abstract
Description
Air conditioning systems and their control methods, devices, and non-volatile storage media
[0001] This application claims priority to the patent application filed on March 26, 2025, with China National Intellectual Property Administration, application number 202510368272.5, entitled "Air Conditioning System and Control Method, Apparatus and Non-volatile Storage Medium Thereof". Technical Field
[0002] This application relates to the field of air conditioning equipment technology, and more specifically, to an air conditioning system and its control method, device, and non-volatile storage medium. Background Technology
[0003] Currently, cold storage technology is widely used in air conditioning equipment. Cold storage refers to the process by which multi-split air conditioners with energy storage functions store cold energy in an energy accumulator. Cold release refers to the process by which multi-split air conditioners with energy storage functions release the cold energy stored in the energy accumulator during the cooling process to assist in cooling and improve their energy efficiency.
[0004] However, the entry and exit mechanisms for cold storage and release in air conditioning systems are primarily based on the temperature of the accumulator and the operating environment. This approach is relatively simplistic and cannot flexibly adapt to changes in operating conditions, resulting in inefficient operation of the cold storage and release functions. Furthermore, when the cold storage capacity is insufficient, the intermittent operation of the cold storage or cooling function leads to deviations in room temperature, which severely impacts the user experience. Summary of the Invention
[0005] The main objective of this application is to provide an air conditioning system and its control method, device, and non-volatile storage medium to solve the problem that the cold storage and release of air conditioning systems in the prior art cannot operate efficiently.
[0006] To achieve the above objectives, according to the first aspect of this application, a method for controlling an air conditioning system is provided, comprising:
[0007] Determine whether the air conditioning system is operating during the first or second electricity price period; wherein the electricity price during the first electricity price period is lower than the electricity price during the second electricity price period.
[0008] When the air conditioning system is in the first electricity price period, the system enters or exits the cold storage mode based on the water temperature of the energy storage tank, the cumulative cold storage time of the system in cold storage mode, and the cumulative cold release time of the system in cold release mode.
[0009] When the air conditioning system is operating during the second electricity price period, the first determination is executed: determine whether the water temperature of the energy storage tank is less than or equal to the first preset temperature T. maxIf yes, control the air conditioning system to enter the cooling release mode; otherwise, control the air conditioning system to exit the cooling release mode.
[0010] Furthermore, when the air conditioning system is operating during the first electricity price period, the method for controlling the air conditioning system to enter or exit the cold storage mode based on the water temperature of the air storage tank, the cumulative cold storage time of the air conditioning system in cold storage mode, and the cumulative cold release time of the air conditioning system in cold release mode includes:
[0011] Determine whether the water temperature of the accumulator is greater than or equal to the second preset temperature T0.
[0012] If so, proceed to the second determination: determine whether the cumulative cold storage time is less than or equal to the first preset time t. max If yes, control the air conditioning system to enter cold storage mode; otherwise, control the air conditioning system to exit cold storage mode.
[0013] Otherwise, determine whether the cumulative duration of cold release is greater than or equal to the second preset duration t. min If yes, control the air conditioning system to execute the second judgment; otherwise, control the air conditioning system to exit the cold storage mode.
[0014] Furthermore, when the cumulative cold storage time is less than or equal to the first preset time t max Subsequently, before the air conditioning system enters the cold storage mode, the control methods for the air conditioning system also include:
[0015] Determine whether the cumulative freezing time of the accumulator is less than or equal to the third preset time t1. If so, control the air conditioning system to enter the cold storage mode; otherwise, control the air conditioning system to exit the cold storage mode.
[0016] Furthermore, before controlling the air conditioning system to enter the cold storage mode after obtaining a cumulative icing time less than or equal to a third preset time t1, the control method for the air conditioning system also includes:
[0017] Determine whether the water level in the accumulator is less than or equal to the preset height H1. If so, control the air conditioning system to enter the cold storage mode; otherwise, control the air conditioning system to exit the cold storage mode.
[0018] Furthermore, the control methods for air conditioning systems also include:
[0019] When the air conditioning system is operating during the second electricity price period, a third determination is made: whether the operating rate of multiple indoor air conditioning units in the air conditioning system is greater than or equal to the preset operating rate X%.
[0020] If both the first and third determinations are true, the air conditioning system is controlled to enter the cooling release mode; otherwise, the air conditioning system is controlled to exit the cooling release mode.
[0021] Furthermore, the control methods for air conditioning systems also include:
[0022] When the air conditioning system is operating during the second electricity price period, the fourth determination is executed: whether the frequency of the air conditioning system's compressor is greater than or equal to the preset frequency f1.
[0023] If both the first and fourth determinations are true, the air conditioning system is controlled to enter the cooling release mode; otherwise, the air conditioning system is controlled to exit the cooling release mode.
[0024] Furthermore, the control methods for air conditioning systems also include:
[0025] When the air conditioning system is operating during the second electricity price period, the fifth judgment is executed: determine whether the maximum pressure of the air conditioning system is greater than or equal to the preset value T1.
[0026] If both the first and fifth determinations are true, the air conditioning system is controlled to enter the cooling release mode; otherwise, the air conditioning system is controlled to exit the cooling release mode.
[0027] Furthermore, the controller of the air conditioning system also includes:
[0028] When the air conditioning system is in the cooling release mode, monitor whether the inlet pipe temperature of the accumulator is less than or equal to the difference between the outlet liquid temperature of the subcooler of the air conditioning system and the subcooling degree T2 increased by the cooling release mode. If so, control the air conditioning system to continue in the cooling release mode; otherwise, control the air conditioning system to exit the cooling release mode.
[0029] Furthermore, the control methods for air conditioning systems also include:
[0030] Determine if the air conditioning system is in whole-system cooling mode. If so, execute the command to control the air conditioning system to enter either cold storage or cold release mode; otherwise, control the air conditioning system to exit either cold storage or cold release mode; and / or
[0031] Receive user commands and control the air conditioning system to enter or exit cold storage mode or cold release mode according to the commands; and / or
[0032] Detect whether any one or more indoor units of the air conditioning system are cooling; if so, control the air conditioning system to exit the cold storage mode.
[0033] According to a second aspect of this application, a control device for an air conditioning system is provided for executing the aforementioned control method for an air conditioning system. The control device for the air conditioning system includes:
[0034] The first judgment unit is used to determine whether the air conditioning system is operating during the first electricity price period or the second electricity price period.
[0035] The first control unit is used to control the air conditioning system to enter or exit the cold storage mode based on the water temperature of the air storage tank, the cumulative cold storage time of the air conditioning system in the cold storage mode, and the cumulative cold release time of the air conditioning system in the cold release mode when the air conditioning system is in the first electricity price period.
[0036] The second judgment unit is used to perform the first judgment when the air conditioning system is operating during the second electricity price period: judging whether the water temperature of the energy storage tank is less than or equal to the first preset temperature T. max ;
[0037] The second control unit is used to control the air conditioning system to enter the cooling release mode when the determination result of the first determination is yes; otherwise, it controls the air conditioning system to exit the cooling release mode.
[0038] According to a third aspect of this application, an air conditioning system is provided, including the control device for the air conditioning system described above.
[0039] According to a fourth aspect of this application, a non-volatile storage medium is provided, the non-volatile storage medium including a stored program, wherein, when the program is running, the device where the non-volatile storage medium is located is controlled to execute the above-described control method for an air conditioning system.
[0040] By applying the technical solution of this application, the control method for the air conditioning system utilizes low electricity prices for cold storage and releases it during high / flat electricity price periods to save energy. Specifically, it stores cold during the first electricity price period and releases it during the second electricity price period. Furthermore, this control method controls the air conditioning system to enter or exit the cold storage mode based on the water temperature of the accumulator, the cumulative duration of cold storage in the cold storage mode, and the cumulative duration of cold release in the cold release mode. It also controls the system to enter or exit the cold release mode based on the water temperature of the accumulator. Therefore, this control method determines whether the air conditioning system should store or release cold by combining the cumulative duration of cold storage, the cumulative duration of cold release, the first electricity price period, the second electricity price period, and the water temperature of the accumulator. This ensures that the system has sufficient and necessary conditions for cold storage and release under different circumstances, enabling stable and efficient operation. This solves the problem of inefficient cold storage and release in existing air conditioning systems. Attached Figure Description
[0041] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:
[0042] Figure 1 shows a first flowchart of the cold storage mode of the control method for the air conditioning system according to this application;
[0043] Figure 2 shows a flowchart of the cooling release mode of the control method for the air conditioning system according to this application;
[0044] Figure 3 shows a second flowchart of the cold storage mode of the control method for the air conditioning system according to this application;
[0045] Figure 4 shows a schematic diagram of the control device of the air conditioning system according to this application.
[0046] The above-mentioned figures include the following reference numerals: 10, first judgment unit; 20, first control unit; 30, second judgment unit; 40, second control unit. Detailed Implementation
[0047] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0048] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, 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 application pertains.
[0049] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0050] This application provides a control method for an air conditioning system, as shown in Figures 1 to 3, including:
[0051] Steps S104 and S203 determine whether the air conditioning system is operating during the first electricity price period or the second electricity price period; wherein the electricity price during the first electricity price period is lower than the electricity price during the second electricity price period.
[0052] Step S100: When the air conditioning system is in the first electricity price period, the air conditioning system is controlled to enter or exit the cold storage mode based on the water temperature of the energy storage device of the air conditioning system, the cumulative cold storage time of the air conditioning system in the cold storage mode, and the cumulative cold release time of the air conditioning system in the cold release mode.
[0053] Step S204: When the air conditioning system is operating during the second electricity price period, perform the first determination: determine whether the water temperature of the energy storage tank is less than or equal to the first preset temperature T. max If yes, control the air conditioning system to enter the cooling release mode; otherwise, control the air conditioning system to exit the cooling release mode.
[0054] The control method for the air conditioning system in this application utilizes low electricity prices for cold storage and releases cold energy during periods of high / flat electricity prices. Specifically, it stores cold energy during the first electricity price period and releases it during the second electricity price period. Furthermore, this control method controls the air conditioning system to enter or exit the cold storage mode based on the water temperature of the accumulator, the cumulative duration of cold storage in the cold storage mode, and the cumulative duration of cold release in the cold release mode. It also controls the system to enter or exit the cold release mode based on the water temperature of the accumulator. Therefore, this control method determines whether the air conditioning system should store or release cold energy by combining the cumulative duration of cold storage and release, the first and second electricity price periods, and the water temperature of the accumulator. This ensures that the system has sufficient and necessary conditions for cold storage and release under different circumstances, enabling stable and efficient operation. This solves the problem of inefficient cold storage and release in existing air conditioning systems.
[0055] It should be noted that once the air conditioning system enters the cold storage mode, it begins to accumulate the cold storage time. This accumulated time is reset to zero at the end of the first electricity price period. The total time the air conditioning system operates in cold release mode before the start of the current first electricity price period is counted as the cumulative cold release time. If cold storage was performed during the current first electricity price period, the cumulative cold release time will be reset to zero at the end of that period. If no cold storage was performed during the current first electricity price period, the cumulative cold release time will not be reset and will continue to accumulate upon re-entering the cold release mode. This operation is for continuity with the previous period and therefore does not require resetting. The air conditioning system in question is a multi-split system.
[0056] In specific implementation, T max The water temperature at which the accumulator has fully released its cooling capacity can be obtained through experimental testing and preset in the unit's program. When the accumulator water temperature reaches T... max This indicates that the accumulator's cooling capacity has been fully released, and it will either stop cooling or cease operation. Specifically, T max The temperature is 35℃.
[0057] Specifically, methods for detecting whether it is within the first electricity price period include: users pre-entering their time-of-use electricity price information, for example, the electricity price is low during the period XX:XX to YY:YY; high during the period YY:YY to ZZ:ZZ; and flat during the period ZZ:ZZ to XX:XX; or, retrieving local time-of-use electricity price information based on location information. If it is not within the low electricity price period, i.e., not within the first electricity price period, then cooling storage will be stopped / not performed. Similarly, if it is not within the high / flat electricity price period, then cooling release will be stopped / not performed.
[0058] In this embodiment, when the air conditioning system is operating during the first electricity price period, the method for controlling the air conditioning system to enter or exit the cold storage mode based on the water temperature of the air storage tank, the cumulative cold storage time of the air conditioning system in cold storage mode, and the cumulative cold release time of the air conditioning system in cold release mode includes:
[0059] Step S105: Determine whether the water temperature of the accumulator is greater than or equal to the second preset temperature T0.
[0060] If so, proceed to the second determination: step S106, determine whether the cumulative cold storage time is less than or equal to the first preset time t. max If yes, control the air conditioning system to enter cold storage mode; otherwise, control the air conditioning system to exit cold storage mode.
[0061] Otherwise, determine whether the cumulative duration of cold release is greater than or equal to the second preset duration t. min If yes, control the air conditioning system to execute the second judgment; otherwise, control the air conditioning system to exit the cold storage mode.
[0062] In practical implementation, for an energy storage device using water as the energy storage material, the water temperature of the energy storage device is detected at the beginning of the first electricity price period. If the water temperature is greater than or equal to T0, the process directly proceeds to step S106. If the water temperature is less than T0, the following judgment is made: the total time the air conditioning system has been running in cooling release mode until the beginning of the first electricity price period is counted as the cumulative cooling release time. If cooling storage has been performed during the first electricity price period, the cumulative cooling release time is reset to zero at the end of the first electricity price period. If no cooling storage has been performed during the first electricity price period, the cumulative cooling release time is not reset to zero and continues to be accumulated when the cooling release mode is entered again. If condition S105 is met, the process proceeds to step S106; if condition S105 is not met, cooling storage is not performed. The purpose of setting S105 is to identify situations where the water temperature of the energy storage device rises during the ineffective dissipation of cold energy into the environment when the user is not using cooling release, thus preventing cooling storage from being performed.
[0063] Specifically, the cumulative cooling time is initially set to t0 at the factory, where t0 > t0. min This is to ensure that the initial cooling can proceed smoothly.
[0064] The judgment method in step S105 is illustrated by an example: Assume t min =40 min T0 = 15℃.
[0065] In practical implementation, t max The time it takes for an artificially configured accumulator to fully store cold energy can be obtained through experimental testing and preset in the unit's program. If the cumulative cold storage time reaches t... maxThen it is assumed that the accumulator has stored enough cold energy; optionally, t max The duration is 8 hours. When the air conditioning system enters cold storage mode, the accumulated cold storage time begins to accumulate and is reset to zero at the end of the first electricity price period (the time is not reset even if the unit stops or exits cold storage mode during this period). When the accumulated cold storage time reaches t... max If this happens, then the cooling process will be stopped / not performed.
[0066] In this embodiment, when the cumulative cold storage time is less than or equal to the first preset time t max Subsequently, before the air conditioning system enters the cold storage mode, the control methods for the air conditioning system also include:
[0067] Step S107: Determine whether the cumulative icing time of the accumulator is less than or equal to the third preset time t1. If so, control the air conditioning system to enter the cold storage mode; otherwise, control the air conditioning system to exit the cold storage mode.
[0068] In practical implementation, for an energy accumulator using water as the energy storage material, its cooling process includes a cooling process from hot water to 0°C, followed by the water freezing process. t1 is a manually set timeframe, representing the duration of the water freezing process in the accumulator (from the water temperature dropping to 0°C until the end of the cooling process). This timeframe can be obtained through experimental testing and pre-programmed into the unit's program. Optionally, t1 < t max t1 is 5h.
[0069] The reason for setting steps S106 and S107 is that at the start of cold storage, if the accumulator is in a state where the cold energy has not been completely released, that is, the accumulator already has some residual cold energy (the water in the accumulator is in a cold water state), then there is no need to perform the time t step. max The cold storage process is sufficient to store the cold energy, so step S107 is set to end the cold storage when the freezing time t1 is met, and the termination condition is more precise.
[0070] In this embodiment, before controlling the air conditioning system to enter the cold storage mode after obtaining that the cumulative icing time is less than or equal to the third preset time t1, the control method of the air conditioning system further includes:
[0071] Step S108: Determine whether the water level in the accumulator is less than or equal to the preset height H1. If yes, control the air conditioning system to enter the cold storage mode; otherwise, control the air conditioning system to exit the cold storage mode.
[0072] In practice, the accumulator is equipped with a water level detection device. During the freezing process, the water level gradually rises due to the difference in density between ice and water. When the water level rises to height H1, the accumulator is full of cold energy. Therefore, step S108 is set so that when the water level exceeds H1, the cold energy storage process is stopped or terminated.
[0073] The reason for setting steps S107 and S108 is that if there is still some unmelted ice in the accumulator when the cold storage starts, the cold capacity can be fully stored without reaching the freezing time t1. Therefore, step S108 is set to end the cold storage when the water level height H1 is met, making the termination condition more precise.
[0074] In this embodiment, the control method for the air conditioning system further includes:
[0075] Step S205: When the air conditioning system is operating during the second electricity price period, perform the third determination: determine whether the operating rate of multiple indoor air conditioning units in the air conditioning system is greater than or equal to the preset operating rate X%.
[0076] If both the first and third determinations are true, the air conditioning system is controlled to enter the cooling release mode; otherwise, the air conditioning system is controlled to exit the cooling release mode.
[0077] In practical implementation, the operating rate can be calculated based on the number of indoor units, i.e., operating rate = number of indoor units in operation / total number of indoor units, or it can be calculated based on the indoor unit capacity, i.e., operating rate = indoor unit capacity in operation / total indoor unit capacity. To prevent refrigerant flow obstruction when using heat release mode when too few indoor units are in operation, step S205 is set, i.e., the indoor unit operating rate must be greater than or equal to X% to use the heat release mode. When the operating rate is less than X%, heat release is either stopped or not performed. Specifically, 0 < X ≤ 100, where X can be obtained through experimental testing and preset in the unit program; optionally, X is 30.
[0078] It should be noted that when too few indoor units are running, the refrigerant circulation becomes obstructed due to the use of cold release. This is because a large flow of refrigerant is required to absorb cold energy from the cold storage unit and then deliver it to each indoor unit. If only a few indoor units are running, the refrigerant demand decreases, resulting in insufficient refrigerant circulation and consequently, obstructed flow.
[0079] In this embodiment, the control method for the air conditioning system further includes:
[0080] Step S206: When the air conditioning system is operating during the second electricity price period, perform the fourth determination: determine whether the frequency of the air conditioning system compressor is greater than or equal to the preset frequency f1.
[0081] If both the first and fourth determinations are true, the air conditioning system is controlled to enter the cooling release mode; otherwise, the air conditioning system is controlled to exit the cooling release mode.
[0082] In practical implementation, to prevent refrigerant flow obstruction caused by using refrigerant release when the compressor frequency is too low, condition S206 is set, meaning the compressor frequency must be greater than or equal to f1 to use the refrigerant release mode. When the compressor frequency is less than f1, refrigerant release is either discontinued or not performed. f1 can be obtained through experimental testing and can be preset in the unit program; optionally, f1 is 35Hz.
[0083] In this embodiment, the control method for the air conditioning system further includes:
[0084] Step S207: When the air conditioning system is operating during the second electricity price period, perform the fifth determination: determine whether the maximum pressure of the air conditioning system is greater than or equal to the preset value T1.
[0085] If both the first and fifth determinations are true, the air conditioning system is controlled to enter the cooling release mode; otherwise, the air conditioning system is controlled to exit the cooling release mode.
[0086] In practical implementation, to prevent refrigerant flow obstruction when using cooling release mode due to excessively low system pressure, step S207 is set, meaning the system pressure must be greater than or equal to T1 to use the cooling release mode. When the system pressure is less than T1, cooling release is either stopped or not performed. T1 can be obtained through experimental testing and preset in the unit program; optionally, T1 is 40℃. The preset value T1 is the temperature value corresponding to the pressure of the air conditioning system.
[0087] In practice, the unit will release coolant when conditions S201 to S207 above are met.
[0088] In this embodiment, the controller of the air conditioning system further includes:
[0089] Step S208: When the air conditioning system is in the cooling release mode, monitor whether the inlet pipe temperature of the accumulator is less than or equal to the difference between the outlet liquid temperature of the subcooler of the air conditioning system and the subcooling degree T2 increased by the cooling release mode. If so, control the air conditioning system to continue in the cooling release mode; otherwise, control the air conditioning system to exit the cooling release mode.
[0090] In practice, during the cooling release process, the conditions in step S208 also need to be checked. When the accumulator releases cooling, it adds subcooling to the unit, meaning the accumulator inlet pipe temperature is lower than the subcooler outlet liquid temperature, and the difference between the two is the additional subcooling brought by the accumulator. Step S208 is set so that cooling can continue only when the additional subcooling exceeds T2. When the additional subcooling is less than T2, it indicates that the cooling effect of the accumulator is very poor and has no effect on the unit's energy efficiency, so cooling is stopped. Specifically, T2 is obtained through experimental testing and preset in the unit program; optionally, T2 is 2℃.
[0091] In this embodiment, the control method for the air conditioning system further includes:
[0092] In step S101 or step S201, determine whether the air conditioning system is in whole-system cooling mode. If the air conditioning system is in whole-system cooling mode, execute the instruction to control the air conditioning system to enter the cold storage mode or the cold release mode; otherwise, control the air conditioning system to exit the cold storage mode or the cold release mode.
[0093] In practice, the air conditioning system has two operating modes: cooling and heating. The entire unit should be set to cooling mode to meet the need for cold storage or cold release; therefore, the entire unit must be in cooling mode.
[0094] In this embodiment, step S102 or step S202 involves receiving a user's instruction and controlling the air conditioning system to enter or exit the cold storage mode or the cold release mode according to the instruction.
[0095] In practice, users can choose whether to enable the energy storage function of the air conditioning system via a wired controller or other means; the default is enabled. When the user manually sets it to disabled, the air conditioning system exits / does not perform the cold storage mode. If the user sets it to enabled, or it is enabled by default, other checks are performed. Furthermore, users can choose whether to enable the cold release function of the air conditioning system via a wired controller or other means; the default is enabled. If the user manually sets it to disabled, the air conditioning system exits / does not perform the cold release mode. If the user sets it to enabled, or it is enabled by default, other checks are performed. Steps S102 and S202 can be provided to the user together or separately.
[0096] In this embodiment, step S103 involves detecting whether any one or more indoor air conditioning units in the air conditioning system are cooling; if so, controlling the air conditioning system to exit the cold storage mode.
[0097] In practice, when all indoor air conditioning units are turned off, it indicates that the user has no cooling demand. Because cold storage and cooling conflict in the system flow path, cold storage can only operate when cooling is not required. When the user turns on any one or more indoor air conditioning units for cooling, cold storage will be deactivated / discontinued.
[0098] It should be noted that for air conditioning systems with energy storage function, the system enters or exits the cold storage mode when the judgment conditions in Figures 1 and 3 are met. The operating sequence of S101, S102, S103, S104, and S100 can be changed arbitrarily; the system enters the cold storage mode when all judgment conditions are met, and exits the cold storage mode if any judgment condition is not met, provided that cold storage is currently in progress; otherwise, the system will not enter the cold storage mode if it is in another mode or is shut down.
[0099] It should be noted that for air conditioning systems with energy storage function, the system enters or exits the cooling release mode when the judgment conditions in Figure 2 are met. The operating sequence of S201-S207 can be changed arbitrarily. The system enters the cooling release mode when all conditions are met. If any judgment condition is not met, the system exits the cooling release mode if it is currently releasing coolness; otherwise, it will not enter the cooling release mode if it is currently in another mode or shut down (the system may exit or not enter the cooling release mode, but if necessary, the unit can still perform cooling in the normal cooling mode).
[0100] The technical problem this application addresses is: how to enter or exit the cold storage and release mode according to actual operating conditions (unit status, accumulator status, environmental information, etc.) so that the system has sufficient and necessary conditions for cold storage and release under any circumstances, enabling stable and efficient operation.
[0101] This application specifies the entry and exit conditions for the cold storage mode, including overall unit status, user selection, unit operating status, and electricity price information. It also specifies the entry and exit conditions for the cold release mode, including overall unit status, user selection, unit operating status, and electricity price information. The beneficial effects include: providing entry and exit conditions for the cold storage mode ensures that it meets the unit's cold release needs without excessive cold storage leading to waste; and providing entry and exit conditions for the cold release mode ensures full utilization of the cold storage capacity without continuing to release cold after the cold storage capacity is depleted, thus preventing damage to the unit's energy efficiency.
[0102] This application also provides a control device for an air conditioning system, as shown in FIG4, for executing the control method of the air conditioning system in the above embodiments. The control device for the air conditioning system includes:
[0103] The first judgment unit 10 is used to determine whether the air conditioning system is operating during the first electricity price period or the second electricity price period.
[0104] The first control unit 20 is used to control the air conditioning system to enter or exit the cold storage mode according to the water temperature of the energy storage tank of the air conditioning system, the cumulative cold storage time of the air conditioning system in the cold storage mode, and the cumulative cold release time of the air conditioning system in the cold release mode when the air conditioning system is in the first electricity price period.
[0105] The second judgment unit 30 is used to perform a first judgment when the air conditioning system is operating during the second electricity price period: judging whether the water temperature of the energy storage tank is less than or equal to the first preset temperature T. max ;
[0106] The second control unit 40 is used to control the air conditioning system to enter the cooling release mode when the determination result of the first determination is yes; otherwise, it controls the air conditioning system to exit the cooling release mode.
[0107] In practical implementation, the control device of the air conditioning system sets up a first judgment unit 10, a first control unit 20, a second judgment unit 30, and a second control unit 40, so that the cumulative duration of cold storage, the cumulative duration of cold release, the first electricity price period, and the second electricity price period, together with the water temperature of the energy storage tank, jointly determine whether the air conditioning system should store or release cold. This ensures that the system has sufficient and necessary conditions for cold storage and cold release under different conditions according to the actual operating situation, enabling stable and efficient operation. This solves the problem that the cold storage and cold release of the existing air conditioning system cannot operate efficiently.
[0108] This application also provides an air conditioning system, including the control device of the air conditioning system described in the above embodiments.
[0109] In practical implementation, since the air conditioning system includes a control device, and the control device includes a first judgment unit 10, a first control unit 20, a second judgment unit 30 and a second control unit 40, the problem of the air conditioning system's inefficient operation of cold storage and cold release is solved.
[0110] This application also provides a non-volatile storage medium, which includes a stored program, wherein, when the program is running, it controls the device where the non-volatile storage medium is located to execute the control method of the air conditioning system in the above embodiments.
[0111] Specifically, the aforementioned storage medium is used to store program instructions that perform the following functions, thereby achieving the following functions:
[0112] Determine whether the air conditioning system is operating during the first or second electricity price period; wherein the electricity price during the first electricity price period is lower than the electricity price during the second electricity price period.
[0113] When the air conditioning system is in the first electricity price period, the system enters or exits the cold storage mode based on the water temperature of the energy storage tank, the cumulative cold storage time of the system in cold storage mode, and the cumulative cold release time of the system in cold release mode.
[0114] When the air conditioning system is operating during the second electricity price period, the first determination is executed: determine whether the water temperature of the energy storage tank is less than or equal to the first preset temperature T. max If yes, control the air conditioning system to enter the cooling release mode; otherwise, control the air conditioning system to exit the cooling release mode.
[0115] As can be seen from the above description, the embodiments of this application achieve the following technical effects:
[0116] The control method for the air conditioning system in this application utilizes low electricity prices for cold storage and releases cold energy during periods of high / flat electricity prices. Specifically, it stores cold energy during the first electricity price period and releases it during the second electricity price period. Furthermore, this control method controls the air conditioning system to enter or exit the cold storage mode based on the water temperature of the accumulator, the cumulative duration of cold storage in the cold storage mode, and the cumulative duration of cold release in the cold release mode. It also controls the system to enter or exit the cold release mode based on the water temperature of the accumulator. Therefore, this control method determines whether the air conditioning system should store or release cold energy by combining the cumulative duration of cold storage and release, the first and second electricity price periods, and the water temperature of the accumulator. This ensures that the system has sufficient and necessary conditions for cold storage and release under different circumstances, enabling stable and efficient operation. This solves the problem of inefficient cold storage and release in existing air conditioning systems.
[0117] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0118] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0119] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A control method for an air conditioning system, characterized in that, include: Determine whether the air conditioning system is operating during a first electricity price period or a second electricity price period; wherein the electricity price during the first electricity price period is lower than the electricity price during the second electricity price period; When the air conditioning system is in operation during the first electricity price period, the air conditioning system is controlled to enter or exit the cold storage mode based on the water temperature of the energy storage tank of the air conditioning system, the cumulative cold storage time of the air conditioning system in the cold storage mode, and the cumulative cold release time of the air conditioning system in the cold release mode. When the air conditioning system is operating during the second electricity price period, a first determination is performed: determining whether the water temperature of the energy storage device is less than or equal to a first preset temperature T. max If yes, control the air conditioning system to enter the cooling release mode; otherwise, control the air conditioning system to exit the cooling release mode.
2. The control method for the air conditioning system according to claim 1, characterized in that, When the air conditioning system is operating during the first electricity price period, a method for controlling the air conditioning system to enter or exit the cold storage mode based on the water temperature of the air storage tank, the cumulative cold storage duration of the air conditioning system in cold storage mode, and the cumulative cold release duration of the air conditioning system in cold release mode includes: Determine whether the water temperature of the accumulator is greater than or equal to the second preset temperature T0. If so, perform the second determination: determine whether the cumulative cold storage time is less than or equal to the first preset time t. max If yes, control the air conditioning system to enter the cold storage mode; otherwise, control the air conditioning system to exit the cold storage mode. Otherwise, determine whether the cumulative cooling time is greater than or equal to the second preset time t. min If yes, control the air conditioning system to execute the second determination; otherwise, control the air conditioning system to exit the cold storage mode.
3. The control method for the air conditioning system according to claim 2, characterized in that, When the cumulative cold storage duration is less than or equal to the first preset duration t max Subsequently, before controlling the air conditioning system to enter the cold storage mode, the control method for the air conditioning system further includes: Determine whether the cumulative icing time of the energy storage device is less than or equal to a third preset time t1. If so, control the air conditioning system to enter the cold storage mode; otherwise, control the air conditioning system to exit the cold storage mode.
4. The control method for the air conditioning system according to claim 3, characterized in that, After obtaining that the cumulative icing time is less than or equal to the third preset time t1, but before controlling the air conditioning system to enter the cold storage mode, the control method of the air conditioning system further includes: Determine whether the water level in the accumulator is less than or equal to a preset height H1. If so, control the air conditioning system to enter the cold storage mode; otherwise, control the air conditioning system to exit the cold storage mode.
5. The control method for an air conditioning system according to claim 1, characterized in that, The control method for the air conditioning system further includes: When the air conditioning system is operating during the second electricity price period, a third determination is made: whether the operating rate of the multiple indoor air conditioning units of the air conditioning system is greater than or equal to the preset operating rate X%. If both the first and third determinations are true, the air conditioning system is controlled to enter the cooling release mode; otherwise, the air conditioning system is controlled to exit the cooling release mode.
6. The control method for an air conditioning system according to claim 1, characterized in that, The control method for the air conditioning system further includes: When the air conditioning system is operating during the second electricity price period, the fourth determination is performed: determining whether the frequency of the air conditioning system's compressor is greater than or equal to a preset frequency f1. If both the first and fourth determinations are true, the air conditioning system is controlled to enter the cooling release mode; otherwise, the air conditioning system is controlled to exit the cooling release mode.
7. The control method for an air conditioning system according to claim 1, characterized in that, The control method for the air conditioning system further includes: When the air conditioning system is operating during the second electricity price period, the fifth determination is executed: determine whether the maximum pressure of the air conditioning system is greater than or equal to the preset value T1. If both the first and fifth determinations are true, the air conditioning system is controlled to enter the cooling release mode; otherwise, the air conditioning system is controlled to exit the cooling release mode.
8. The control method for an air conditioning system according to claim 1, characterized in that, The controller of the air conditioning system also includes: When the air conditioning system is in the cooling release mode, monitor whether the inlet pipe temperature of the accumulator is less than or equal to the difference between the outlet liquid temperature of the subcooler of the air conditioning system and the subcooling degree T2 increased by the cooling release mode. If so, control the air conditioning system to continue the cooling release mode; otherwise, control the air conditioning system to exit the cooling release mode.
9. The control method for an air conditioning system according to claim 1, characterized in that, The control method for the air conditioning system further includes: Determine whether the air conditioning system is in whole-system cooling mode. If the air conditioning system is in whole-system cooling mode, execute the command to control the air conditioning system to enter the cold storage mode or the cold release mode; otherwise, control the air conditioning system to exit the cold storage mode or the cold release mode; and / or Receive user instructions and control the air conditioning system to enter or exit the cold storage mode or the cold release mode according to the instructions; and / or The system detects whether any one or more of the indoor units of the air conditioning system are cooling. If so, it controls the air conditioning system to exit the cold storage mode.
10. A control device for an air conditioning system, characterized in that, A control method for executing an air conditioning system according to any one of claims 1 to 9, wherein the control device for the air conditioning system comprises: The first judgment unit is used to determine whether the operating period of the air conditioning system is during the first electricity price period or the second electricity price period; The first control unit is used to control the air conditioning system to enter or exit the cold storage mode based on the water temperature of the energy storage tank of the air conditioning system, the cumulative cold storage time of the air conditioning system in the cold storage mode, and the cumulative cold release time of the air conditioning system in the cold release mode when the air conditioning system is in the first electricity price period. The second judgment unit is used to perform a first judgment when the air conditioning system is operating during the second electricity price period: determining whether the water temperature of the energy storage device is less than or equal to a first preset temperature T. max ; The second control unit is configured to control the air conditioning system to enter the cooling release mode when the determination result of the first determination is yes; otherwise, control the air conditioning system to exit the cooling release mode.
11. An air conditioning system, characterized in that, Includes the control device for the air conditioning system as described in claim 10.
12. A non-volatile storage medium, characterized in that, The non-volatile storage medium includes a stored program, wherein, when the program is executed, the device containing the non-volatile storage medium is controlled to perform the control method of the air conditioning system according to any one of claims 1 to 9.