Air conditioner control method and device, air conditioning unit and computer readable storage medium

Abstract

The invention provides an air conditioner control method and device, an air conditioning unit and a computer readable storage medium. The method comprises the steps that the current secondary refrigerant concentration of a secondary refrigerant in the air conditioning unit is obtained; operation compensation parameters corresponding to the current secondary refrigerant concentration are determined; acquiring a first operation parameter of the air conditioning unit; compensating the first operation parameter through the operation compensation parameter to obtain a second operation parameter; and a compressor in the air conditioning unit is controlled to operate according to the second operation parameter. The operation compensation parameter is obtained based on the current secondary refrigerant concentration of the air conditioning unit, and the operation parameter of the compressor is compensated through the operation compensation parameter, so that the compressor can execute refrigeration based on the actual physical attribute of the secondary refrigerant, the refrigeration target of the air conditioning unit can be more accurately achieved, and the reliability of the unit is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning, and more particularly to an air conditioning control method, apparatus, air conditioning unit, and computer-readable storage medium. Background Technology

[0002] Currently, water-cooled air conditioners on the market have specific water temperature requirements for the refrigerant. When the water temperature is low, such as below 10°C, antifreeze, such as ethylene glycol, needs to be added to the refrigerant. However, when the refrigerant is an aqueous solution of ethylene glycol of different concentrations, the thermophysical properties of the aqueous solution of ethylene glycol are different, which causes a significant change in the physical properties of the refrigerant in the air conditioning unit, directly affecting the cooling effect and operational reliability of the unit. Summary of the Invention

[0003] The main objective of this invention is to provide an air conditioning control method, device, air conditioning unit, and computer-readable storage medium, aiming to solve the problem that changes in the concentration of the refrigerant affect the cooling effect and reliability of the unit in the prior art.

[0004] To achieve the above objectives, the present invention provides an air conditioning control method, the method comprising the following steps: Obtain the current refrigerant concentration in the air conditioning unit; Determine the operating compensation parameters corresponding to the current refrigerant concentration; Obtain the first operating parameters of the air conditioning unit; The second operating parameter is obtained by compensating the first operating parameter using the operating compensation parameter. The compressor in the air conditioning unit is controlled to operate at the second operating parameters.

[0005] Optionally, determining the operating compensation parameters corresponding to the current refrigerant concentration includes: Obtain the first specific heat capacity corresponding to the current refrigerant concentration, and the second specific heat capacity corresponding to pure water; Calculate the difference in specific heat capacity between the first specific heat capacity and the second specific heat capacity; The refrigerant attenuation coefficient is obtained based on the specific heat capacity difference value, wherein the specific heat capacity difference value is positively correlated with the refrigerant attenuation coefficient. Generate the operating compensation parameters that include the coolant decay coefficient.

[0006] Optionally, obtaining the first operating parameters of the air conditioning unit includes: Obtain the target control temperature and the current indoor temperature; Calculate the temperature difference between the target control temperature and the current indoor temperature; The cooling performance parameters of the air conditioning unit are obtained, and the initial cooling demand is calculated based on the temperature difference and the cooling performance parameters. Generate the first operating parameters that include the initial cooling requirements.

[0007] Optionally, the step of compensating the first operating parameter with the operating compensation parameter to obtain the second operating parameter includes: Obtain the initial cooling demand from the first operating parameters, wherein the initial cooling demand is the cooling demand corresponding to the current refrigerant concentration being 0; Obtain the refrigerant attenuation coefficient from the operating compensation parameters; The initial cooling demand is increased based on the refrigerant decay coefficient to obtain the target cooling demand; Generate the second operating parameters that include the target cooling requirements.

[0008] Optionally, the step of compensating the first operating parameter with the operating compensation parameter to obtain the second operating parameter includes: Obtain the first refrigerant freezing point temperature from the first operating parameters and the second refrigerant freezing point temperature from the operating compensation parameters, wherein the second refrigerant freezing point temperature is the freezing point temperature of the refrigerant at the current refrigerant concentration; Update the first refrigerant freezing point temperature in the first operating parameters to the second refrigerant freezing point temperature; Generate the second operating parameters, which include the freezing point temperature of the second refrigerant.

[0009] Optionally, controlling the compressor in the air conditioning unit to operate with the second operating parameters includes: Obtain the target cooling demand from the second operating parameter; Obtain the compressor displacement corresponding to the compressor; The target frequency is calculated based on the target cooling demand and the compressor displacement. Control the compressor to operate at the target frequency.

[0010] Optionally, controlling the compressor in the air conditioning unit to operate with the second operating parameters includes: Obtain the low-pressure temperature of the air conditioning unit and the freezing point temperature of the second refrigerant in the second operating parameters; Determine whether the freezing point difference between the low-pressure temperature and the freezing point temperature of the second refrigerant is less than a preset threshold. If the freezing point difference is less than the preset threshold, the operating frequency of the compressor is reduced.

[0011] To achieve the above objectives, the present invention also provides an air conditioning control device, the air conditioning control device comprising: The first acquisition module is used to acquire the current refrigerant concentration in the air conditioning unit; The first determining module is used to determine the operating compensation parameters corresponding to the current refrigerant concentration; The second acquisition module is used to acquire the first operating parameters of the air conditioning unit; The first compensation module is used to compensate the first operating parameters using the operating compensation parameters to obtain the second operating parameters; The first control module is used to control the compressor in the air conditioning unit to operate according to the second operating parameters.

[0012] To achieve the above objectives, the present invention also provides an air conditioning unit, the air conditioning unit including a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the air conditioning control method as described above.

[0013] To achieve the above objectives, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the air conditioning control method described above.

[0014] This invention proposes an air conditioning control method, device, air conditioning unit, and computer-readable storage medium. The method involves: acquiring the current refrigerant concentration in the air conditioning unit; determining operating compensation parameters corresponding to the current refrigerant concentration; acquiring a first operating parameter of the air conditioning unit; compensating the first operating parameter with the operating compensation parameter to obtain a second operating parameter; and controlling the compressor in the air conditioning unit to operate with the second operating parameter. By obtaining the operating compensation parameter based on the current refrigerant concentration of the air conditioning unit and compensating the compressor's operating parameters with the operating compensation parameter, the compressor can perform refrigeration based on the actual physical properties of the refrigerant, achieving the cooling target of the air conditioning unit more accurately and improving the reliability of the unit. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 This is a flowchart illustrating the first embodiment of the air conditioning control method of the present invention; Figure 2 This is a detailed flowchart of the air conditioning control method of the present invention; Figure 3 This is a schematic diagram of the modular structure of the air conditioning unit of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0022] This invention provides an air conditioning control method, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the air conditioning control method of the present invention, the method comprising the following steps: Step S10: Obtain the current refrigerant concentration in the air conditioning unit; The air conditioning unit in this embodiment is a water-cooled air conditioning unit.

[0023] The refrigerant is the carrier for heat transfer in the air conditioning unit; the specific type of refrigerant can be set according to actual needs; for example, the refrigerant can be water, or it can be an aqueous solution of water and ethylene glycol.

[0024] The refrigerant concentration is the concentration of ethylene glycol in the refrigerant. For example, if the refrigerant is made by mixing 2 units of ethylene glycol and 8 units of water, the corresponding refrigerant concentration is 20%. The current refrigerant concentration is the real-time refrigerant concentration in the air conditioning unit.

[0025] It is understandable that a higher refrigerant concentration provides better freeze protection, but it also reduces the specific heat capacity, leading to less heat exchange and affecting the cooling efficiency of the air conditioning unit. Therefore, on-site users can adjust the refrigerant concentration according to actual needs, such as by selecting a specific refrigerant concentration on the main control board of the air conditioning unit. After adjustment, the current refrigerant concentration can be updated automatically or manually. It should be noted that the air conditioning unit can operate in both cooling and heating modes. The cooling efficiency in this embodiment and subsequent embodiments reflects the temperature control efficiency in cooling and heating modes, respectively.

[0026] Step S20: Determine the operating compensation parameters corresponding to the current refrigerant concentration; The cooling efficiency and freezing point of the air conditioning unit vary under different refrigerant concentrations. Therefore, in order to ensure the operation of the air conditioning unit under different refrigerant concentrations, this embodiment determines the operation compensation parameters based on the current refrigerant concentration and compensates the operation of the air conditioning unit using the operation compensation parameters.

[0027] The specific operating compensation parameters can be set based on the impact of refrigerant concentration on the operation of the air conditioning unit. For example, a higher refrigerant concentration leads to lower cooling efficiency of the air conditioning unit. Therefore, operating compensation parameters can be set to improve the operating efficiency of the air conditioning unit and achieve the desired cooling efficiency. Similarly, a higher refrigerant concentration leads to a lower freezing point of the refrigerant. Therefore, operating compensation parameters can be set to reduce the freezing point temperature limit of the refrigerant during operation, thereby enabling the air conditioning unit to operate at a lower refrigerant temperature.

[0028] Step S30: Obtain the first operating parameters of the air conditioning unit; The first operating parameter is the default operating parameter of the air conditioning unit; the default operating parameter can be the parameter before compensation, or the fixed initial operating parameter, such as the operating parameter corresponding to the refrigerant concentration of 0 when the refrigerant is water.

[0029] The specific parameter types included in the first operating parameter can be set according to actual needs. It is understood that since the first operating parameter is compensated based on the refrigerant concentration, the first operating parameter includes relevant parameters that are affected by the refrigerant concentration, such as cooling demand and refrigerant freezing point temperature.

[0030] Step S40: The first operating parameter is compensated using the operating compensation parameter to obtain the second operating parameter; After obtaining the operating compensation parameters, the first operating parameters can be compensated based on the operating compensation parameters to obtain the second operating parameters.

[0031] The second operating parameter is the compensated operating parameter.

[0032] Step S50: Control the compressor in the air conditioning unit to operate with the second operating parameters.

[0033] After determining the second operating parameters, the compressor is controlled to operate based on the second operating parameters, so that the compressor can achieve the cooling effect when the refrigerant concentration is 0 under the current refrigerant concentration. That is, while ensuring the cooling effect, the antifreeze effect is achieved by increasing the refrigerant concentration, thereby avoiding the problem of freezing and cracking of the water-cooled plate heat exchanger in the air conditioning unit.

[0034] This embodiment obtains operating compensation parameters based on the current refrigerant concentration of the air conditioning unit, and compensates the compressor's operating parameters using these parameters. This allows the compressor to perform refrigeration based on the actual physical properties of the refrigerant, enabling more precise achievement of the air conditioning unit's refrigeration target and improving the unit's reliability.

[0035] Further details will follow. Figure 2 In the second embodiment of the air conditioning control method of the present invention based on the first embodiment, step S20 includes the following steps: Step S21: Obtain the first specific heat capacity corresponding to the current refrigerant concentration and the second specific heat capacity corresponding to pure water; Different concentrations of refrigerant correspond to different specific heat capacities. The specific relationship between concentration and specific heat capacity can be found in a table:

[0036] It should be noted that the above table is only an example of selected values. In practical applications, broader or more intensive concentration and temperature settings can be used. During actual matching, the most recent concentration in the table can be used to obtain the specific heat capacity. For example, if the current refrigerant concentration is 20% and the temperature is 20°C, then the most recent concentration in the table, i.e., 19.8%, with a specific heat capacity of 3.94 at 20°C, can be used as the corresponding first specific heat capacity. The refrigerant temperature can be detected or set based on actual needs. For ease of explanation, this embodiment and subsequent embodiments use a refrigerant temperature of 20°C as an example.

[0037] If the current refrigerant concentration is 16%, the corresponding freezing point temperature is -7℃. When the current refrigerant temperature is 50℃, the corresponding specific heat capacity is 4.02.

[0038] The second specific heat capacity is the specific heat capacity corresponding to pure water, that is, the specific heat capacity when the refrigerant concentration is 0. The second specific heat capacity is 4.2.

[0039] Step S22: Calculate the specific heat capacity difference between the first specific heat capacity and the second specific heat capacity; Step S23: Obtain the refrigerant attenuation coefficient based on the specific heat capacity difference value, wherein the specific heat capacity difference value is positively correlated with the refrigerant attenuation coefficient; Step S24: Generate the operating compensation parameters that include the coolant attenuation coefficient.

[0040] It is understandable that the specific heat capacity of a refrigerant with added ethylene glycol is lower than that of pure water refrigerant; the higher the concentration, the lower the corresponding specific heat capacity; and the lower the specific heat capacity, the lower the heat transfer efficiency of the refrigerant. Therefore, it is necessary to improve the operating efficiency of the compressor to ensure the cooling efficiency of the air conditioning unit. Therefore, in this embodiment, the difference in specific heat capacity between the first and second specific heat capacities is first calculated. Specifically, the difference between the second and first specific heat capacities is calculated. Since the specific heat capacity of the refrigerant with added ethylene glycol is lower than that of pure water refrigerant, the difference in specific heat capacity is an integer value and increases with the increase of the current refrigerant concentration. Therefore, in this embodiment, the refrigerant attenuation coefficient is set to be positively correlated with the specific heat capacity difference. This allows for a larger refrigerant attenuation coefficient when the current refrigerant concentration is higher, resulting in lower operating efficiency. This increases the compensation for operating parameters, improves cooling efficiency, and thus ensures the cooling efficiency of the air conditioning unit.

[0041] The refrigerant degradation coefficient indicates the decline in the heat transfer efficiency of the refrigerant. Compensation based on the refrigerant degradation coefficient allows for improved operating efficiency to be achieved despite the decline in heat transfer efficiency, thus ensuring the cooling target of the air conditioning unit. Specifically:

[0042] Where Ks is the refrigerant attenuation coefficient; C1 is the first specific heat capacity; and C2 is the second specific heat capacity.

[0043] If the current refrigerant concentration is 19.8% and the current refrigerant temperature is 20 degrees Celsius, the second specific heat capacity can be found in the table to be 3.899 kJ / kg·K; therefore, the refrigerant attenuation coefficient can be calculated as follows:

[0044] Furthermore, in the third embodiment of the air conditioning control method of the present invention based on the first embodiment, step S30 includes the following steps: Step S31: Obtain the target control temperature and the current indoor temperature; Step S32: Calculate the temperature difference between the target control temperature and the current indoor temperature; Step S33: Obtain the cooling performance parameters of the air conditioning unit, and calculate the initial cooling demand based on the temperature difference and the cooling performance parameters; Step S34: Generate the first operating parameters that include the initial cooling requirements.

[0045] The target control temperature is the temperature that the air conditioning unit needs to achieve in the cooling scenario. The target control temperature can be automatically set by the system based on actual conditions, or it can be set by the user based on actual needs.

[0046] The current indoor temperature is the real-time temperature within the cooling scenario; the current indoor temperature can be collected by a temperature sensor.

[0047] The temperature difference indicates the difference between the target control temperature and the current indoor temperature. In order for the indoor temperature to reach the target control file, the air conditioning unit needs to eliminate the temperature difference. Therefore, the temperature difference can reflect the cooling demand.

[0048] Cooling performance parameters are used to reflect the cooling capacity of an air conditioning unit. These parameters are set at the factory. It should be noted that an air conditioning unit contains multiple indoor units, each with its own cooling performance parameters. Since different indoor units have different cooling performance parameters, the initial cooling demand can be calculated by combining the cooling performance parameters of multiple indoor units.

[0049] The initial cooling demand is the cooling demand when the refrigerant concentration is 0; at this point, the cooling demand does not consider the reduction in cooling efficiency caused by the refrigerant concentration; specifically:

[0050] Where n is the number of indoor units in the air conditioning unit that are turned on; tsj is the current indoor temperature; tnj is the target control temperature; kcn Let be the cooling performance parameters of the nth indoor unit. It's understandable that the initial cooling demand is updated in real time. When the indoor unit that is currently running changes—for example, if an indoor unit that is running is switched off, or vice versa—the initial cooling demand needs to be recalculated based on the actual indoor unit that is running.

[0051] Furthermore, in the fourth embodiment of the air conditioning control method of the present invention based on the first embodiment, step S40 includes the following steps: Step S41: Obtain the initial cooling demand from the first operating parameters, wherein the initial cooling demand is the cooling demand corresponding to the current refrigerant concentration being 0; Step S42: Obtain the refrigerant attenuation coefficient in the operating compensation parameters; Step S43: Increase the initial cooling demand based on the refrigerant decay coefficient to obtain the target cooling demand; Step S44: Generate the second operating parameters that include the target cooling requirements.

[0052] Once the initial cooling demand and the refrigerant attenuation coefficient are determined, the initial cooling demand can be compensated for using the refrigerant attenuation coefficient. Specifically, since the refrigerant attenuation coefficient is positively correlated with the specific heat capacity difference, the initial cooling demand can be increased based on the refrigerant attenuation coefficient, thereby enabling the target cooling demand to compensate for the heat transfer attenuation of the refrigerant.

[0053] Where Qm represents the target cooling demand.

[0054] The higher the current refrigerant concentration, the greater the corresponding specific heat capacity difference, the greater the corresponding refrigerant attenuation coefficient, and the greater the target cooling demand after compensation, thus making the air conditioning unit more efficient. When the refrigerant concentration leads to a decrease in heat transfer efficiency, the cooling efficiency of the air conditioning unit can be guaranteed by increasing the operating efficiency of the air conditioning unit accordingly.

[0055] Furthermore, in the fifth embodiment of the air conditioning control method of the present invention based on the first embodiment, step S40 includes the following steps: Step S45: Obtain the first refrigerant freezing point temperature in the first operating parameters and the second refrigerant freezing point temperature in the operating compensation parameters, wherein the second refrigerant freezing point temperature is the freezing point temperature of the refrigerant at the current refrigerant concentration; Step S46: Update the first refrigerant freezing point temperature in the first operating parameters to the second refrigerant freezing point temperature; Step S47: Generate the second operating parameters, which include the freezing point temperature of the second refrigerant.

[0056] The freezing point temperature of the refrigerant is the temperature at which the refrigerant freezes. It can be understood that when the temperature of the evaporator heat exchanger, i.e., the low-pressure temperature, drops to the freezing point, the refrigerant will freeze at the heat exchanger outlet, causing the water-cooled plate heat exchanger to crack. Therefore, an anti-freeze operation is required. Specifically, the anti-freeze operation is based on the refrigerant's freezing point temperature. When the low-pressure temperature drops to or is about to drop to the refrigerant's freezing point, the anti-freeze operation is executed, specifically by reducing the compressor frequency to increase the low-pressure temperature and prevent the water-cooled plate heat exchanger from freezing and cracking.

[0057] As shown in the aforementioned refrigerant concentration table, the higher the refrigerant concentration, the lower the corresponding freezing point temperature. Therefore, the judgment benchmark for antifreeze operation is also lower, allowing the compressor to maintain a higher frequency of operation at lower low-pressure temperatures. If the freezing point temperature is not updated based on the actual refrigerant concentration, the antifreeze operation will limit the compressor operation based on the freezing point temperature of a refrigerant concentration of 0. For example, if the current refrigerant concentration is 19.8%, the corresponding freezing point temperature is -10℃. If the antifreeze operation is performed according to the freezing point temperature of 0℃ for a refrigerant concentration of 0, the compressor frequency will start to be displayed when the low-pressure temperature approaches 0℃, causing the compressor to be unable to operate normally at low-pressure temperatures between -10℃ and 0℃, prematurely limiting the compressor and reducing the performance of the air conditioning unit. Therefore, in this embodiment, the first refrigerant freezing point temperature is updated using the second refrigerant freezing point temperature, so that the antifreeze operation can be performed based on the actual refrigerant concentration. Specifically, step S50 includes the following steps: Step S55: Obtain the low-pressure temperature of the air conditioning unit and the freezing point temperature of the second refrigerant in the second operating parameters; Step S56: Determine whether the freezing point difference between the low-pressure temperature and the freezing point temperature of the second refrigerant is less than a preset threshold. Step S57: If the freezing point difference is less than the preset threshold, then reduce the operating frequency of the compressor.

[0058] After updating the freezing point temperature of the second refrigerant, an anti-freezing operation is performed based on the freezing point temperature of the second refrigerant. Taking the current refrigerant concentration of 19.8% as an example, the table shows that the corresponding freezing point temperature is -10℃, that is, the freezing point temperature of the second refrigerant is -10℃.

[0059] The low-pressure temperature is the actual temperature detected in the cold water plate heat exchanger.

[0060] The preset threshold serves as a margin for antifreeze operation. It is understood that when the low-pressure temperature reaches the freezing point, it will freeze. Therefore, in order to avoid freezing, a preset threshold is set so that the antifreeze operation is performed when the low-pressure temperature is still a certain distance from the freezing point, ensuring that the low-pressure temperature does not reach the freezing point. The specific value of the preset threshold can be set based on actual needs, such as 2℃.

[0061] The freezing point difference is the difference between the low-pressure temperature and the freezing point temperature of the second refrigerant; for example, if the low-pressure temperature is -5℃, then the corresponding freezing point difference is -5 - (-10) = 5.

[0062] If the freezing point difference is less than the preset threshold, it indicates that the low-pressure temperature is about to reach the freezing point. Therefore, the compressor operating frequency is reduced to increase the low-pressure temperature and prevent the chilled water plate heat exchanger from freezing. When specifically reducing the compressor operating frequency, to avoid large fluctuations in the system, a fixed-step reduction can be used. For example, if the step is set to 5%, the compressor frequency will decrease by 5% in each subsequent control cycle until the freezing point difference is greater than the preset threshold. The length of the control cycle can be set based on actual needs, such as 40 seconds.

[0063] If the freezing point difference is greater than or equal to the preset threshold, it indicates that the difference between the low-pressure temperature and the freezing point temperature is large. The continued operation of the compressor will not cause the chilled water plate heat exchanger to freeze. Therefore, at this time, the compressor operating frequency can be controlled based on the actual cooling needs, without having to reduce the compressor operating frequency based on the freezing point temperature.

[0064] It should be noted that in cooling mode, the cold water plate heat exchanger acts as a condenser, so there is no freezing or cracking problem; however, in heating mode, the cold water plate heat exchanger acts as an evaporator, and when the low-pressure temperature drops to the freezing point, it will cause freezing and cracking. Therefore, the anti-freezing operation in this embodiment can be set to start in heating mode. If it is determined that the current operating mode of the air conditioning unit is cooling mode or heating mode, if the current operating mode is cooling mode, step S55 is not executed; if the current operating mode is heating mode, step S55 is executed.

[0065] Furthermore, in the sixth embodiment of the air conditioning control method of the present invention based on the first embodiment, step S50 includes the following steps: Step S51: Obtain the target cooling demand from the second operating parameters; Step S52: Obtain the compressor displacement corresponding to the compressor; Step S53: Calculate the target frequency based on the target cooling demand and the compressor displacement; Step S54: Control the compressor to operate at the target frequency.

[0066] The compressor displacement directly affects the compressor's cooling efficiency; a larger compressor displacement allows for a greater cooling capacity at the same frequency. Therefore, in this embodiment, the target frequency is calculated based on the compressor displacement and the target cooling demand. Specifically:

[0067] Where f is the target frequency; e is an empirical value, which can be set based on actual experience, such as 200; and R is the compressor displacement.

[0068] If the target cooling demand is 20kW and the compressor displacement is 80, then the target frequency can be calculated as 20×220 / 80=55Hz.

[0069] Once the target frequency is obtained, the compressor can be controlled to operate at the target frequency.

[0070] In this embodiment, the target frequency of the compressor can be accurately obtained by combining the target cooling demand with the compressor displacement.

[0071] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0072] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0073] This application also provides an air conditioning control device for implementing the above-described air conditioning control method, the air conditioning control device comprising: The first acquisition module is used to acquire the current refrigerant concentration in the air conditioning unit; The first determining module is used to determine the operating compensation parameters corresponding to the current refrigerant concentration; The second acquisition module is used to acquire the first operating parameters of the air conditioning unit; The first compensation module is used to compensate the first operating parameters using the operating compensation parameters to obtain the second operating parameters; The first control module is used to control the compressor in the air conditioning unit to operate according to the second operating parameters.

[0074] This air conditioning control device obtains operating compensation parameters based on the current refrigerant concentration of the air conditioning unit, and compensates the compressor's operating parameters using these parameters. This allows the compressor to perform refrigeration based on the actual physical properties of the refrigerant, enabling more precise achievement of the air conditioning unit's refrigeration target and improving the unit's reliability.

[0075] It should be noted that the first acquisition module in this embodiment can be used to execute step S10 in this application embodiment, the first determination module in this embodiment can be used to execute step S20 in this application embodiment, the second acquisition module in this embodiment can be used to execute step S30 in this application embodiment, the first compensation module in this embodiment can be used to execute step S40 in this application embodiment, and the first control module in this embodiment can be used to execute step S50 in this application embodiment.

[0076] Furthermore, the first determining module includes: The first acquisition unit is used to acquire the first specific heat capacity corresponding to the current refrigerant concentration and the second specific heat capacity corresponding to pure water; The first calculation unit is used to calculate the specific heat capacity difference between the first specific heat capacity and the second specific heat capacity; The first execution unit is configured to obtain the refrigerant attenuation coefficient based on the specific heat capacity difference value, wherein the specific heat capacity difference value is positively correlated with the refrigerant attenuation coefficient. The first generation unit is used to generate the operating compensation parameters, which include the coolant attenuation coefficient.

[0077] Furthermore, the second acquisition module includes: The second acquisition unit is used to acquire the target control temperature and the current indoor temperature; The second calculation unit is used to calculate the temperature difference between the target control temperature and the current indoor temperature; The third acquisition unit is used to acquire the cooling performance parameters of the air conditioning unit and calculate the initial cooling demand based on the temperature difference and the cooling performance parameters. The second generation unit is used to generate the first operating parameters that include the initial cooling requirements.

[0078] Furthermore, the first compensation module includes: The fourth acquisition unit is used to acquire the initial cooling demand in the first operating parameters, wherein the initial cooling demand is the cooling demand corresponding to the current refrigerant concentration being 0; The fifth acquisition unit is used to acquire the refrigerant attenuation coefficient in the operation compensation parameters; The second execution unit is used to increase the initial cooling demand based on the refrigerant decay coefficient to obtain the target cooling demand; The third generation unit is used to generate the second operating parameters that include the target cooling requirements.

[0079] Furthermore, the first compensation module includes: The sixth acquisition unit is used to acquire the first refrigerant freezing point temperature in the first operating parameters and the second refrigerant freezing point temperature in the operating compensation parameters, wherein the second refrigerant freezing point temperature is the freezing point temperature of the refrigerant at the current refrigerant concentration; The first updating unit is used to update the first refrigerant freezing point temperature in the first operating parameters to the second refrigerant freezing point temperature. The fourth generation unit is used to generate the second operating parameters, which include the freezing point temperature of the second refrigerant.

[0080] Furthermore, the first control module includes: The seventh acquisition unit is used to acquire the target cooling demand in the second operating parameters; The eighth acquisition unit is used to acquire the compressor displacement corresponding to the compressor; The third calculation unit is used to calculate the target frequency based on the target cooling demand and the compressor displacement. A first control unit is used to control the compressor to operate at the target frequency.

[0081] Furthermore, the first control module includes: The ninth acquisition unit is used to acquire the low-pressure temperature of the air conditioning unit and the freezing point temperature of the second refrigerant in the second operating parameters; The first judgment unit is used to determine whether the freezing point difference between the low-pressure temperature and the freezing point temperature of the second refrigerant is less than a preset threshold. The third execution unit is used to reduce the operating frequency of the compressor if the freezing point difference is less than the preset threshold.

[0082] Reference Figure 3In terms of hardware structure, the air conditioning unit may include components such as a communication module 10, a memory 20, and a processor 30. In the air conditioning unit, the processor 30 is connected to both the memory 20 and the communication module 10. The memory 20 stores a computer program, which is executed by the processor 30. When the computer program is executed, it implements the steps of the above-described method embodiment.

[0083] The communication module 10 can connect to external communication devices via a network. The communication module 10 can receive requests from the external communication devices and can also send requests, instructions, and information to the external communication devices, which can be other air conditioning units, servers, or IoT devices, such as televisions, etc.

[0084] The memory 20 can be used to store software programs and various data. The memory 20 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as obtaining the current refrigerant concentration in the air conditioning unit), etc.; the data storage area may include a database, and may store data or information created based on system usage. Furthermore, the memory 20 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.

[0085] The processor 30 is the control center of the air conditioning unit. It connects to various parts of the unit via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 20, and by calling data stored in the memory 20, it performs various functions and processes data, thereby providing overall monitoring of the air conditioning unit. The processor 30 may include one or more processing units; optionally, it may integrate an application processor and a modem processor. The application processor primarily handles the operating system, user interface, and applications, while the modem processor primarily handles wireless communication. It is understood that the modem processor may not be integrated into the processor 30.

[0086] although Figure 3 Not shown, but the above-described air conditioning unit may further include a circuit control module, which is used to connect to a power supply to ensure the normal operation of other components. Those skilled in the art will understand that... Figure 3 The air conditioning unit structure shown does not constitute a limitation on the air conditioning unit and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0087] The present invention also proposes a computer-readable storage medium having a computer program stored thereon. The computer-readable storage medium may be... Figure 3 The memory 20 in the air conditioning unit may also be at least one of ROM (Read-Only Memory) / RAM (Random Access Memory), magnetic disk, optical disk, etc. The computer-readable storage medium includes a number of instructions to cause a terminal device with a processor (which may be a television, automobile, mobile phone, computer, server, terminal, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0088] In this invention, the terms "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0090] Although embodiments of the present invention have been shown and described above, the scope of protection of the present invention is not limited thereto. It is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, and substitutions to the above embodiments within the scope of the present invention, and such changes, modifications, and substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air conditioning control method, characterized in that, The air conditioning control method includes: Obtain the current refrigerant concentration in the air conditioning unit; Determine the operating compensation parameters corresponding to the current refrigerant concentration; Obtain the first operating parameters of the air conditioning unit; The second operating parameter is obtained by compensating the first operating parameter using the operating compensation parameter. The compressor in the air conditioning unit is controlled to operate at the second operating parameters.

2. The air conditioning control method as described in claim 1, characterized in that, The determination of the operating compensation parameters corresponding to the current refrigerant concentration includes: Obtain the first specific heat capacity corresponding to the current refrigerant concentration, and the second specific heat capacity corresponding to pure water; Calculate the difference in specific heat capacity between the first specific heat capacity and the second specific heat capacity; The refrigerant attenuation coefficient is obtained based on the specific heat capacity difference value, wherein the specific heat capacity difference value is positively correlated with the refrigerant attenuation coefficient. Generate the operating compensation parameters that include the coolant decay coefficient.

3. The air conditioning control method as described in claim 1, characterized in that, The process of obtaining the first operating parameter of the air conditioning unit includes: Obtain the target control temperature and the current indoor temperature; Calculate the temperature difference between the target control temperature and the current indoor temperature; The cooling performance parameters of the air conditioning unit are obtained, and the initial cooling demand is calculated based on the temperature difference and the cooling performance parameters. Generate the first operating parameters that include the initial cooling requirements.

4. The air conditioning control method as described in claim 1, characterized in that, The step of compensating the first operating parameter with the operating compensation parameter to obtain the second operating parameter includes: Obtain the initial cooling demand from the first operating parameters, wherein the initial cooling demand is the cooling demand corresponding to the current refrigerant concentration being 0; Obtain the refrigerant attenuation coefficient from the operating compensation parameters; The initial cooling demand is increased based on the refrigerant decay coefficient to obtain the target cooling demand; Generate the second operating parameters that include the target cooling requirements.

5. The air conditioning control method as described in claim 1, characterized in that, The step of compensating the first operating parameter with the operating compensation parameter to obtain the second operating parameter includes: Obtain the first refrigerant freezing point temperature from the first operating parameters and the second refrigerant freezing point temperature from the operating compensation parameters, wherein the second refrigerant freezing point temperature is the freezing point temperature of the refrigerant at the current refrigerant concentration; Update the first refrigerant freezing point temperature in the first operating parameters to the second refrigerant freezing point temperature; Generate the second operating parameters, which include the freezing point temperature of the second refrigerant.

6. The air conditioning control method as described in claim 1, characterized in that, The control of the compressor in the air conditioning unit to operate at the second operating parameter includes: Obtain the target cooling demand from the second operating parameter; Obtain the compressor displacement corresponding to the compressor; The target frequency is calculated based on the target cooling demand and the compressor displacement. Control the compressor to operate at the target frequency.

7. The air conditioning control method as described in claim 1, characterized in that, The control of the compressor in the air conditioning unit to operate at the second operating parameter includes: Obtain the low-pressure temperature of the air conditioning unit and the freezing point temperature of the second refrigerant in the second operating parameters; Determine whether the freezing point difference between the low-pressure temperature and the freezing point temperature of the second refrigerant is less than a preset threshold. If the freezing point difference is less than the preset threshold, the operating frequency of the compressor is reduced.

8. An air conditioning control device, characterized in that, The air conditioning control device includes: The first acquisition module is used to acquire the current refrigerant concentration in the air conditioning unit; The first determining module is used to determine the operating compensation parameters corresponding to the current refrigerant concentration; The second acquisition module is used to acquire the first operating parameters of the air conditioning unit; The first compensation module is used to compensate the first operating parameters using the operating compensation parameters to obtain the second operating parameters; The first control module is used to control the compressor in the air conditioning unit to operate according to the second operating parameters.

9. An air conditioning unit, characterized in that, The air conditioning unit includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When executed by the processor, the computer program implements the steps of the air conditioning control method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the air conditioning control method as described in any one of claims 1 to 7.

Images