Mode switching method, system, device and storage medium of natural cooling unit

Abstract

The application discloses a mode switching method, system and device of a natural cooling unit and a storage medium, and the method comprises the following steps: calculating the energy efficiency ratio of the natural cooling unit in a current mode; and selecting an operation mode to be enabled according to the calculated energy efficiency ratio of the natural cooling unit in the current mode and a set switching strategy. The application provides a mode switching method, system and device of a natural cooling unit and a storage medium. Since the changes of a load, unit configuration and performance attenuation are reflected on the energy efficiency ratio, the energy efficiency ratio of the natural cooling unit in the current mode is calculated, then the operation mode to be enabled of the natural cooling unit is selected according to the calculated energy efficiency ratio and the set switching strategy, and the natural cooling unit can always operate in the best mode, so that the energy-saving performance of the air conditioning unit is improved, and the application is worth adopting and promoting.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a mode switching method, system, device and storage medium for a natural cooling unit. Background Technology

[0002] With the development of data center cooling technology and people's increasing attention to and pursuit of data center energy consumption, the concept of natural cooling has been gradually applied to data centers, and more and more air conditioning units with natural cooling technology are being installed in data center computer rooms.

[0003] Currently, the outdoor ambient temperature switching point for each mode of a natural cooling unit is a fixed value. Taking a refrigerant pump dual-cycle natural cooling unit as an example, when the outdoor ambient temperature is ≥15℃, it operates in compressor mode; when the outdoor ambient temperature is ≤5℃, it will switch to refrigerant pump natural cooling mode; and when 5℃ < outdoor ambient temperature <15℃, it will switch to hybrid mode.

[0004] However, the existing mode switching method has the following problems:

[0005] (1) When setting the outdoor ambient temperature switching point for each mode of the unit, the influence of different loads and different unit configurations on the outdoor ambient temperature switching point of each mode was not considered, resulting in the unit failing to operate in the optimal mode.

[0006] (2) After long-term operation, the unit will experience varying degrees of performance degradation. For example, the evaporator and condenser may become clogged due to dust accumulation, or the air-to-air heat exchanger may become scaled, or key components such as the compressor and refrigerant pump may wear out. These problems will lead to a decrease in cooling capacity, which will require adjustments to the outdoor ambient temperature switching points for each mode. If adjustments are not made in time, the temperature in the machine room will become uncontrollable.

[0007] Therefore, improvements to existing technologies are necessary.

[0008] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Summary of the Invention

[0009] This invention provides a mode switching method, system, device, and storage medium for a natural cooling unit to address the shortcomings of existing technologies.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] In a first aspect, the present invention provides a mode switching method for a natural cooling unit, the method comprising:

[0012] Calculate the energy efficiency ratio of the natural cooling unit under the current mode;

[0013] The operating mode to be enabled is selected based on the calculated energy efficiency ratio of the natural cooling unit in the current mode and the set switching strategy.

[0014] Furthermore, in the mode switching method for the natural cooling unit, the step of calculating the energy efficiency ratio of the natural cooling unit in the current mode includes:

[0015] Measure the cooling capacity of the natural cooling unit;

[0016] Collect the real-time power consumption of the natural cooling unit;

[0017] Based on the cooling capacity and the real-time power consumption, the energy efficiency ratio of the natural cooling unit in the current mode is calculated using the following formula: Energy efficiency ratio = Cooling capacity / Real-time power consumption.

[0018] Furthermore, in the mode switching method for the natural cooling unit, the step of measuring the cooling capacity of the natural cooling unit includes:

[0019] Collect the return air temperature, return air humidity, supply air temperature, and supply air humidity of the natural cooling unit;

[0020] Calculate the enthalpy difference between supply and return air based on the return air temperature, return air humidity, supply air temperature, and supply air humidity.

[0021] Measure the internal circulation air volume of the natural cooling unit;

[0022] Based on the supply and return air enthalpy difference and the internal circulation air volume, the cooling capacity of the natural cooling unit is calculated using the following formula: Cooling capacity = Supply and return air enthalpy difference * Internal circulation air volume.

[0023] Furthermore, in the mode switching method of the natural cooling unit, the step of calculating the enthalpy difference between the supply and return air based on the return air temperature, return air humidity, supply air temperature, and supply air humidity includes:

[0024] Calculate the return air enthalpy value based on the return air temperature and the return air humidity;

[0025] The supply air enthalpy value is calculated based on the supply air temperature and the supply air humidity.

[0026] The supply and return air enthalpy difference is calculated using the following formula: Supply and return air enthalpy difference = Return air enthalpy - Supply air enthalpy.

[0027] Furthermore, in the mode switching method of the natural cooling unit, the step of measuring the internal circulation air volume of the natural cooling unit includes:

[0028] Detect the pressure difference before and after the air guide ring of the circulating fan in the natural cooling unit;

[0029] Based on the pressure difference across the air guide ring and the size of the air guide ring, the internal circulation air volume is calculated using the following formula: Internal circulation air volume = k * (pressure difference across the air guide ring)^0.5; where k is a coefficient related to the size of the air guide ring.

[0030] Furthermore, in the mode switching method for the natural cooling unit, the step of selecting the operating mode to be enabled based on the calculated energy efficiency ratio of the natural cooling unit in the current mode and the set switching strategy includes:

[0031] Determine whether the calculated energy efficiency ratio of the natural cooling unit in the current mode is less than the expected energy efficiency value in the target mode;

[0032] If so, the natural cooling unit is switched to the target mode, and the energy efficiency ratio of the natural cooling unit in the target mode is calculated;

[0033] Determine whether the calculated energy efficiency ratio of the natural cooling unit in the target mode is greater than the energy efficiency ratio calculated before the natural cooling unit switches;

[0034] If yes, the natural cooling unit will remain in the target mode; otherwise, the natural cooling unit will be switched back to the mode before the switch.

[0035] Furthermore, in the mode switching method for the natural cooling unit, the step of selecting the operating mode to be enabled based on the calculated energy efficiency ratio of the natural cooling unit in the current mode and the set switching strategy includes:

[0036] The database is queried to see if a target mode that meets the set conditions exists. The set conditions are that the cooling capacity of the target mode is greater than or equal to the sum of the cooling capacity of the natural cooling unit in the current mode and a first threshold, and the energy efficiency ratio of the target mode is greater than or equal to the sum of the energy efficiency ratio of the natural cooling unit in the current mode and a second threshold.

[0037] If so, the natural cooling unit will be switched to the target mode.

[0038] If not, the natural cooling unit will remain in its current operating mode.

[0039] Furthermore, in the mode switching method for the natural cooling unit, the step of switching the natural cooling unit to the target mode includes:

[0040] Determine whether the number of target patterns that meet the set conditions is one;

[0041] If so, the natural cooling unit will be switched to the target mode;

[0042] If not, the natural cooling unit will be switched to the target mode with the highest energy efficiency ratio.

[0043] Secondly, the present invention provides a mode switching system for a natural cooling unit, the system comprising:

[0044] The energy efficiency ratio calculation module is used to calculate the energy efficiency ratio of the natural cooling unit in the current mode;

[0045] The mode switching module is used to select the operating mode to be enabled based on the calculated energy efficiency ratio of the natural cooling unit in the current mode and the set switching strategy.

[0046] Furthermore, in the mode switching system of the natural cooling unit, the energy efficiency ratio calculation module is specifically used for:

[0047] Measure the cooling capacity of the natural cooling unit;

[0048] Collect the real-time power consumption of the natural cooling unit;

[0049] Based on the cooling capacity and the real-time power consumption, the energy efficiency ratio of the natural cooling unit in the current mode is calculated using the following formula: Energy efficiency ratio = Cooling capacity / Real-time power consumption.

[0050] Furthermore, in the mode switching system of the natural cooling unit, the step of measuring the cooling capacity of the natural cooling unit performed by the energy efficiency ratio calculation module specifically includes:

[0051] Collect the return air temperature, return air humidity, supply air temperature, and supply air humidity of the natural cooling unit;

[0052] Calculate the enthalpy difference between supply and return air based on the return air temperature, return air humidity, supply air temperature, and supply air humidity.

[0053] Measure the internal circulation air volume of the natural cooling unit;

[0054] Based on the supply and return air enthalpy difference and the internal circulation air volume, the cooling capacity of the natural cooling unit is calculated using the following formula: Cooling capacity = Supply and return air enthalpy difference * Internal circulation air volume.

[0055] Furthermore, in the mode switching system of the natural cooling unit, the step of calculating the enthalpy difference between the supply and return air based on the return air temperature, return air humidity, supply air temperature, and supply air humidity, performed by the energy efficiency ratio calculation module, includes:

[0056] Calculate the return air enthalpy value based on the return air temperature and the return air humidity;

[0057] The supply air enthalpy value is calculated based on the supply air temperature and the supply air humidity.

[0058] The supply and return air enthalpy difference is calculated using the following formula: Supply and return air enthalpy difference = Return air enthalpy - Supply air enthalpy.

[0059] Furthermore, in the mode switching system of the natural cooling unit, the step of measuring the internal circulation air volume of the natural cooling unit performed by the energy efficiency ratio calculation module includes:

[0060] Detect the pressure difference before and after the air guide ring of the circulating fan in the natural cooling unit;

[0061] Based on the pressure difference across the air guide ring and the size of the air guide ring, the internal circulation air volume is calculated using the following formula: Internal circulation air volume = k * (pressure difference across the air guide ring)^0.5; where k is a coefficient related to the size of the air guide ring.

[0062] Furthermore, in the mode switching system of the natural cooling unit, the mode switching module is specifically used for:

[0063] Determine whether the calculated energy efficiency ratio of the natural cooling unit in the current mode is less than the expected energy efficiency value in the target mode;

[0064] If so, the natural cooling unit is switched to the target mode, and the energy efficiency ratio of the natural cooling unit in the target mode is calculated;

[0065] Determine whether the calculated energy efficiency ratio of the natural cooling unit in the target mode is greater than the energy efficiency ratio calculated before the natural cooling unit switches;

[0066] If yes, the natural cooling unit will remain in the target mode; otherwise, the natural cooling unit will be switched back to the mode before the switch.

[0067] Furthermore, in the mode switching system of the natural cooling unit, the mode switching module is specifically used for:

[0068] The database is queried to see if a target mode that meets the set conditions exists. The set conditions are that the cooling capacity of the target mode is greater than or equal to the sum of the cooling capacity of the natural cooling unit in the current mode and a first threshold, and the energy efficiency ratio of the target mode is greater than or equal to the sum of the energy efficiency ratio of the natural cooling unit in the current mode and a second threshold.

[0069] If so, the natural cooling unit will be switched to the target mode.

[0070] If not, the natural cooling unit will remain in its current operating mode.

[0071] Furthermore, in the mode switching system of the natural cooling unit, the step of switching the natural cooling unit to the target mode performed by the mode switching module specifically includes:

[0072] Determine whether the number of target patterns that meet the set conditions is one;

[0073] If so, the natural cooling unit will be switched to the target mode;

[0074] If not, the natural cooling unit will be switched to the target mode with the highest energy efficiency ratio.

[0075] Thirdly, the present invention provides a computer device, the device comprising:

[0076] One or more controllers;

[0077] Memory, used to store one or more programs;

[0078] The one or more programs are executed by the one or more controllers, causing the one or more controllers to implement the mode switching method for the natural cooling unit as described in the first aspect above.

[0079] Fourthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the mode switching method for a natural cooling unit as described in the first aspect above.

[0080] Compared with the prior art, the present invention has the following beneficial effects:

[0081] This invention provides a mode switching method, system, device, and storage medium for a natural cooling unit. Since changes in load, unit configuration, and performance degradation are reflected in the energy efficiency ratio, this invention calculates the energy efficiency ratio of the natural cooling unit under the current mode, and then selects the operating mode to be used by the natural cooling unit based on the calculated energy efficiency ratio and the set switching strategy. This ensures that the natural cooling unit always operates in the optimal mode, thereby improving the energy-saving performance of the air conditioning unit. This invention is highly worthy of adoption and promotion. Attached Figure Description

[0082] 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, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0083] Figure 1This is a schematic flowchart of a mode switching method for a natural cooling unit provided in Embodiment 1 of the present invention;

[0084] Figure 2 yes Figure 1 A flowchart illustrating the specific steps of step S100;

[0085] Figure 3 yes Figure 2 A flowchart illustrating the specific steps of step S101;

[0086] Figure 4 yes Figure 3 A flowchart illustrating the specific steps of step S1012;

[0087] Figure 5 yes Figure 3 A flowchart illustrating the specific steps of step S1013;

[0088] Figure 6 yes Figure 1 A flowchart illustrating the specific steps of step S200;

[0089] Figure 7 yes Figure 1 A flowchart illustrating another specific step in step S200;

[0090] Figure 8 yes Figure 7 A flowchart illustrating the specific steps of step S220;

[0091] Figure 9 This is a schematic diagram of the database framework mentioned in Embodiment 1 of the present invention;

[0092] Figure 10 This is a schematic diagram of the functional modules of a mode switching system for a natural cooling unit provided in Embodiment 2 of the present invention.

[0093] Figure 11 This is a schematic diagram of the structure of a computer device provided in Embodiment 3 of the present invention. Detailed Implementation

[0094] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0095] In the description of this invention, it should be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present simultaneously. When a component is considered to be "set" on another component, it can be directly set on the other component or there may be an intermediate component present simultaneously.

[0096] Furthermore, terms such as “long,” “short,” “inner,” and “outer” indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the purpose of describing the present invention and are not intended to indicate or imply that the device or component referred to must have this specific orientation or operate in a specific orientational configuration. Therefore, they should not be construed as limitations of the present invention.

[0097] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0098] Example 1

[0099] In view of the shortcomings of existing mode switching technologies for natural cooling units, the applicant, based on years of practical experience and professional knowledge in the design and manufacture of such units, and in conjunction with theoretical application, has actively conducted research and innovation to create a technology that can solve the shortcomings of existing technologies, making mode switching of natural cooling units more reasonable and feasible. After continuous research, design, and repeated improvements, this invention, which is indeed valuable, has finally been created.

[0100] Please refer to Figure 1 This invention provides a mode switching method for natural cooling units. This method is applicable to air conditioning units with natural cooling technology, such as those using series refrigerant pumps, independent refrigerant pumps, combined refrigerant pumps, indirect evaporative cooling, and other units utilizing natural cold sources to varying degrees and in different ways, for mode switching scenarios. The method is executed by a mode switching system for the natural cooling unit, which can be implemented in software and / or hardware and integrated within the data center's server room equipment. The method specifically includes the following steps:

[0101] S100, Calculate the energy efficiency ratio of the natural cooling unit in the current mode.

[0102] It should be noted that the energy efficiency ratio (EER) is a ratio of energy conversion efficiency, and the value of the EER reflects the energy-saving performance of the air conditioning unit. The higher the EER, the higher the energy conversion efficiency of the air conditioning unit, and therefore the less electricity the air conditioning unit consumes per unit of time.

[0103] Since changes in load, unit configuration, and performance degradation are reflected in the energy efficiency ratio, this embodiment first calculates the energy efficiency ratio of the natural cooling unit in the current mode, and then selects the operating mode that the natural cooling unit should use based on the calculated energy efficiency ratio and the set switching strategy. This allows the natural cooling unit to switch to the optimal mode every time it needs to switch. Compared with the existing technology that sets the outdoor ambient temperature switching point to a fixed value, this embodiment has higher accuracy and stronger anti-interference ability.

[0104] In this embodiment, as Figure 2 As shown, step S100 can be further refined to include the following steps:

[0105] S101. Measure the cooling capacity of the natural cooling unit.

[0106] It should be noted that cooling capacity refers to the total amount of heat removed from a closed space, room, or area per unit time when the air conditioning unit is operating in a cooling mode.

[0107] In this embodiment, as Figure 3 The aforementioned step S101 can be further refined to include the following steps:

[0108] S1011. Collect the return air temperature, return air humidity, supply air temperature, and supply air humidity of the natural cooling unit.

[0109] It should be noted that the above parameters can be collected using corresponding types of sensors. For example, the return air temperature of the natural cooling unit can be obtained using a return air temperature sensor, the supply air temperature of the natural cooling unit can be obtained using a supply air temperature sensor, the return air humidity of the natural cooling unit can be obtained using a return air humidity sensor, and the supply air humidity of the natural cooling unit can be obtained using a supply air humidity sensor.

[0110] S1012. Calculate the enthalpy difference between supply and return air based on the return air temperature, return air humidity, supply air temperature, and supply air humidity.

[0111] In this embodiment, as Figure 4 The aforementioned step S1012 can be further refined to include the following steps:

[0112] S10121. Calculate the return air enthalpy value based on the return air temperature and the return air humidity.

[0113] S10122. Calculate the supply air enthalpy value based on the supply air temperature and the supply air humidity.

[0114] S10123. Calculate the supply and return air enthalpy difference according to the following formula: Supply and return air enthalpy difference = Return air enthalpy value - Supply air enthalpy value.

[0115] It should be noted that, in addition to the specific methods for calculating the supply and return air enthalpy difference given in this invention, those skilled in the art can also fit the calculation formula through experiments based on the structural characteristics of different air conditioning units. As long as the method for determining the supply and return air enthalpy difference only uses the return air enthalpy value and the supply air enthalpy value for calculation, it falls within the protection scope of this invention.

[0116] S1013. Measure the internal circulation air volume of the natural cooling unit.

[0117] It should be noted that internal circulation air volume refers to the amount of air that the air conditioning unit delivers to a closed space or room per unit time.

[0118] In this embodiment, as Figure 5 The aforementioned step S1013 can be further refined to include the following steps:

[0119] S10131. Detect the pressure difference before and after the air guide ring of the circulating fan in the natural cooling unit.

[0120] S10132. Based on the pressure difference across the air guide ring and the size of the air guide ring, calculate the internal circulation air volume using the following formula: Internal circulation air volume = k * (pressure difference across the air guide ring)^0.5; where k is a coefficient related to the size of the air guide ring.

[0121] It should be noted that k can be set by those skilled in the art based on their experience with the size of the air guide ring, and this embodiment does not impose any specific limitations on it.

[0122] It is understood that, in addition to measuring the internal circulation air volume of the natural cooling unit by the method described above in this embodiment, it can also be measured by other methods. Given that these measurement methods have been implemented in the prior art and are not the focus of this solution design, they will not be elaborated on here.

[0123] S1014. Based on the supply and return air enthalpy difference and the internal circulation air volume, calculate the cooling capacity of the natural cooling unit using the following formula: Cooling capacity = Supply and return air enthalpy difference * Internal circulation air volume.

[0124] It is understood that, in addition to measuring the cooling capacity of the natural cooling unit using the method described above in this embodiment, the cooling capacity of the natural cooling unit can also be measured in other ways. For example, the refrigerant state at the inlet and outlet of the evaporator can be measured using the pressure and temperature sensors built into the system. Then, the enthalpy value and enthalpy difference at the inlet and outlet of the evaporator can be calculated based on the refrigerant state. The refrigerant flow rate can be measured using a refrigerant flow meter. Finally, the refrigerant flow rate * inlet and outlet enthalpy difference = evaporator heat exchange, thereby obtaining the cooling capacity of the natural cooling unit.

[0125] S102. Collect the real-time power consumption of the natural cooling unit.

[0126] It should be noted that the real-time power consumption refers to the power consumed by the natural cooling unit under rated voltage.

[0127] For example, the real-time power consumption can be collected from the electricity meter that is integrated into the natural cooling unit.

[0128] S103. Based on the cooling capacity and the real-time power consumption, calculate the energy efficiency ratio of the natural cooling unit in the current mode using the following formula: Energy efficiency ratio = Cooling capacity / Real-time power consumption.

[0129] It should be noted that this step involves calculating the ratio of the cooling capacity of the natural cooling unit to the real-time power consumption, and recording this ratio as the energy efficiency ratio of the natural cooling unit.

[0130] S200: Select the operating mode to be enabled based on the calculated energy efficiency ratio of the natural cooling unit in the current mode and the set switching strategy.

[0131] It should be noted that the switching strategy set in this embodiment can be implemented in multiple ways. For example, it can be a method of switching first and then comparing, or a method of comparing first and then switching. This embodiment will now use these two implementation methods as examples for detailed description.

[0132] In the first implementation, such as Figure 6 The aforementioned step S200 can be further refined to include the following steps:

[0133] S201. Determine whether the calculated energy efficiency ratio of the natural cooling unit in the current mode is less than the expected energy efficiency value of the target mode; if yes, proceed to step S202; if no, continue to proceed to S201.

[0134] It should be noted that the expected energy efficiency value of the target mode can be arbitrarily set by those skilled in the art based on experience and actual application scenarios, and this embodiment does not impose specific limitations here. However, it is understood that this expected energy efficiency value is only a value that is approximately close to the actual energy efficiency ratio, and it does not represent the actual energy efficiency ratio. The actual energy efficiency ratio needs to be determined through calculation to ensure its accuracy.

[0135] S202. Switch the natural cooling unit to the target mode and calculate the energy efficiency ratio of the natural cooling unit in the target mode.

[0136] It should be noted that the calculation of the energy efficiency ratio in this step can be achieved using the calculation method provided in the foregoing content of this embodiment.

[0137] S203. Determine whether the calculated energy efficiency ratio of the natural cooling unit in the target mode is greater than the energy efficiency ratio calculated before the natural cooling unit switches; if yes, proceed to step S204; if no, proceed to step S205.

[0138] S204. Keep the natural cooling unit running in the target mode.

[0139] S205. Switch the natural cooling unit back to the mode before switching.

[0140] It should be noted that this implementation method is based on the premise that the current mode has poor energy efficiency and needs to be switched to the target mode for testing. If the energy efficiency ratio improves, the system will continue to operate in the target mode. If the energy efficiency ratio does not improve or even worsens, the system will revert to the mode before switching.

[0141] In the second implementation, such as Figure 7 The aforementioned step S200 can be further refined to include the following steps:

[0142] S210. Query the database to see if there is a target mode that meets the set conditions. The set conditions are that the cooling capacity of the target mode is greater than or equal to the sum of the cooling capacity of the natural cooling unit in the current mode and the first threshold, and the energy efficiency ratio of the target mode is greater than or equal to the sum of the energy efficiency ratio of the natural cooling unit in the current mode and the second threshold. If yes, proceed to step S220; if no, proceed to step S230.

[0143] It should be noted that the first threshold and the second threshold can be arbitrarily set by technicians based on experience and actual application scenarios, and this embodiment does not impose specific limitations on them.

[0144] In this step, setting a target mode that meets the conditions requires not only that the cooling capacity be greater than or equal to the sum of the cooling capacity of the natural cooling unit in the current mode and the first threshold, but also that the energy efficiency ratio be greater than or equal to the sum of the energy efficiency ratio of the natural cooling unit in the current mode and the second threshold. If either of these conditions is not met, the set conditions are considered not met.

[0145] In this embodiment, the stable operating status of the unit in history is recorded in a database so that when determining the mode switch, the energy efficiency ratio of different "operating modes" and the cooling capacity corresponding to each mode can be "queried" in the database to finally select the best operating mode.

[0146] When creating a new database, all operating conditions can be run once in the laboratory, and it can be updated in real time during field operation.

[0147] (1) Detect the outdoor temperature of the unit to obtain the "outdoor operating condition";

[0148] (2) Detect the return air temperature and humidity of the unit to obtain the "indoor operating conditions";

[0149] (3) The computer group's real-time "cooling capacity" and "energy efficiency ratio" are calculated according to the calculation method provided in the foregoing content of this embodiment;

[0150] (4) Once the stable operation conditions of the unit are met (all automatically adjustable devices of the unit maintain a fixed value for 30 seconds), the indoor operating conditions, outdoor operating conditions, calculated cooling capacity, calculated energy efficiency ratio, and the current operating mode are saved to the database. The database framework diagram is shown below. Figure 9 As shown.

[0151] S220. Switch the natural cooling unit to the target mode.

[0152] In this embodiment, as Figure 8 The aforementioned step S220 can be further refined to include the following steps:

[0153] S221. Determine whether the number of target patterns that meet the set conditions is one; if yes, proceed to step S222; if no, proceed to step S223.

[0154] S222. Switch the natural cooling unit to the target mode;

[0155] S223. Switch the natural cooling unit to the target mode with the highest energy efficiency ratio.

[0156] It should be noted that this step is for situations where more than one target mode matching the set conditions may be found. In such cases, for energy conservation reasons, the target mode with the highest energy efficiency ratio, i.e., the most energy-efficient, should be selected for switching.

[0157] S230. Keep the natural cooling unit running in the current mode.

[0158] This invention provides a mode switching method for natural cooling units. Since changes in load, unit configuration, and performance degradation are reflected in the energy efficiency ratio, this method calculates the energy efficiency ratio of the natural cooling unit under the current mode, and then selects the operating mode to be used for the natural cooling unit based on the calculated energy efficiency ratio and the set switching strategy. This ensures that the natural cooling unit always operates in the optimal mode, thereby improving the energy-saving performance of the air conditioning unit. This method is highly worthy of adoption and promotion.

[0159] Example 2

[0160] Please refer to Figure 10The present invention provides a functional module diagram of a mode switching system for a natural cooling unit according to Embodiment 2 of the present invention. This system is applicable to executing the mode switching method for a natural cooling unit provided in this embodiment of the present invention. The system specifically includes the following modules:

[0161] The energy efficiency ratio calculation module 301 is used to calculate the energy efficiency ratio of the natural cooling unit in the current mode;

[0162] The mode switching module 302 is used to select the operating mode to be enabled based on the calculated energy efficiency ratio of the natural cooling unit in the current mode and the set switching strategy.

[0163] Preferably, the energy efficiency ratio calculation module 301 is specifically used for:

[0164] Measure the cooling capacity of the natural cooling unit;

[0165] Collect the real-time power consumption of the natural cooling unit;

[0166] Based on the cooling capacity and the real-time power consumption, the energy efficiency ratio of the natural cooling unit in the current mode is calculated using the following formula: Energy efficiency ratio = Cooling capacity / Real-time power consumption.

[0167] Preferably, the step of measuring the cooling capacity of the natural cooling unit performed by the energy efficiency ratio calculation module 301 specifically includes:

[0168] Collect the return air temperature, return air humidity, supply air temperature, and supply air humidity of the natural cooling unit;

[0169] Calculate the enthalpy difference between supply and return air based on the return air temperature, return air humidity, supply air temperature, and supply air humidity.

[0170] Measure the internal circulation air volume of the natural cooling unit;

[0171] Based on the supply and return air enthalpy difference and the internal circulation air volume, the cooling capacity of the natural cooling unit is calculated using the following formula: Cooling capacity = Supply and return air enthalpy difference * Internal circulation air volume.

[0172] Preferably, the step of calculating the supply and return air enthalpy difference based on the return air temperature, return air humidity, supply air temperature, and supply air humidity performed by the energy efficiency ratio calculation module 301 includes:

[0173] Calculate the return air enthalpy value based on the return air temperature and the return air humidity;

[0174] The supply air enthalpy value is calculated based on the supply air temperature and the supply air humidity.

[0175] The supply and return air enthalpy difference is calculated using the following formula: Supply and return air enthalpy difference = Return air enthalpy - Supply air enthalpy.

[0176] Preferably, the step of measuring the internal circulation air volume of the natural cooling unit performed by the energy efficiency ratio calculation module 301 includes:

[0177] Detect the pressure difference before and after the air guide ring of the circulating fan in the natural cooling unit;

[0178] Based on the pressure difference across the air guide ring and the size of the air guide ring, the internal circulation air volume is calculated using the following formula: Internal circulation air volume = k * (pressure difference across the air guide ring)^0.5; where k is a coefficient related to the size of the air guide ring.

[0179] Preferably, the mode switching module 302 is specifically used for:

[0180] Determine whether the calculated energy efficiency ratio of the natural cooling unit in the current mode is less than the expected energy efficiency value in the target mode;

[0181] If so, the natural cooling unit is switched to the target mode, and the energy efficiency ratio of the natural cooling unit in the target mode is calculated;

[0182] Determine whether the calculated energy efficiency ratio of the natural cooling unit in the target mode is greater than the energy efficiency ratio calculated before the natural cooling unit switches;

[0183] If yes, the natural cooling unit will remain in the target mode; otherwise, the natural cooling unit will be switched back to the mode before the switch.

[0184] Preferably, the mode switching module 302 is specifically used for:

[0185] The database is queried to see if a target mode that meets the set conditions exists. The set conditions are that the cooling capacity of the target mode is greater than or equal to the sum of the cooling capacity of the natural cooling unit in the current mode and a first threshold, and the energy efficiency ratio of the target mode is greater than or equal to the sum of the energy efficiency ratio of the natural cooling unit in the current mode and a second threshold.

[0186] If so, the natural cooling unit will be switched to the target mode.

[0187] If not, the natural cooling unit will remain in its current operating mode.

[0188] Preferably, the step of switching the natural cooling unit to the target mode performed by the mode switching module 302 specifically includes:

[0189] Determine whether the number of target patterns that meet the set conditions is one;

[0190] If so, the natural cooling unit will be switched to the target mode;

[0191] If not, the natural cooling unit will be switched to the target mode with the highest energy efficiency ratio.

[0192] Although this document frequently uses terms such as energy efficiency ratio calculation module, natural cooling unit, energy efficiency ratio, and mode switching module, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0193] This invention provides a mode switching system for natural cooling units. Since changes in load, unit configuration, and performance degradation are reflected in the energy efficiency ratio, the system calculates the energy efficiency ratio of the natural cooling unit under the current mode and then selects the operating mode to be used for the natural cooling unit based on the calculated energy efficiency ratio and the set switching strategy. This ensures that the natural cooling unit always operates in the optimal mode, thereby improving the energy-saving performance of the air conditioning unit. This system is highly worthy of adoption and promotion.

[0194] The above system can execute the methods provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the methods.

[0195] Example 3

[0196] Figure 11 This is a schematic diagram of the structure of a computer device provided in Embodiment 3 of the present invention. Figure 11 A block diagram of an exemplary computer device 12 suitable for implementing embodiments of the present invention is shown. Figure 11 The computer device 12 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present invention.

[0197] like Figure 11 As shown, the computer device 12 is represented in the form of a general-purpose computing device. The components of the computer device 12 may include, but are not limited to: one or more processors or processing units 16, system memory 28, and a bus 18 connecting different system components (including system memory 28 and processing unit 16).

[0198] Bus 18 represents one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. For example, these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0199] Computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by computer device 12, including volatile and non-volatile media, removable and non-removable media.

[0200] System memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. Computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 may be used to read and write non-removable, non-volatile magnetic media (…). Figure 11 Not shown; usually referred to as a "hard drive"). Although Figure 11 Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of the present invention.

[0201] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 42 typically perform the functions and / or methods described in the embodiments of the present invention.

[0202] Computer device 12 can also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), and with one or more devices that enable a user to interact with the computer device 12, and / or with any device that enables the computer device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). This communication can be performed via input / output (I / O) interface 22. Furthermore, computer device 12 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 20. As shown, network adapter 20 communicates with other modules of computer device 12 via bus 18. It should be understood that, although... Figure 11As not shown, it can be used in conjunction with computer device 12 with other hardware and / or software modules, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0203] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, such as implementing the mode switching method for the natural cooling unit provided in the embodiments of the present invention.

[0204] That is, when the processing unit 16 executes the program, it performs the following: calculates the energy efficiency ratio of the natural cooling unit in the current mode; and selects the operating mode to be enabled based on the calculated energy efficiency ratio of the natural cooling unit in the current mode and the set switching strategy.

[0205] Example 4

[0206] Embodiment 4 of the present invention provides a computer-readable storage medium having a computer program stored thereon. When executed by a processor, the program implements the mode switching method for a natural cooling unit as provided in all embodiments of the present application.

[0207] That is, when the processor executes the program, it performs the following: calculates the energy efficiency ratio of the natural cooling unit in the current mode; and selects the operating mode to be enabled based on the calculated energy efficiency ratio of the natural cooling unit in the current mode and the set switching strategy.

[0208] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0209] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0210] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0211] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0212] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that this application is intended to encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0213] Furthermore, certain terms used in this application have been used to describe embodiments of this application. For example, "an embodiment," "an embodiment," and / or "some embodiments" mean that a particular feature, structure, or characteristic described in connection with that embodiment may be included in at least one embodiment of this application. Therefore, it is to be emphasized and understood that two or more references to "an embodiment" or "an embodiment" or "an alternative embodiment" in various parts of this specification do not necessarily refer to the same embodiment. Moreover, specific features, structures, or characteristics may be appropriately combined in one or more embodiments of this application.

[0214] It should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may extract some features as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when the content of each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0215] Each patent, patent application, publication of the patent application, and other materials such as articles, books, specifications, publications, documents, articles, etc., cited herein may be incorporated by reference. All contents used for all purposes, except for any history of prosecution documents relating to it, that may be inconsistent with or conflict with this document, or any such history of prosecution documents that may have a limiting effect on the widest extent of the claims, are now or hereafter associated with this document. For example, in the event of any inconsistency or conflict between the description, definition, and / or use of terms associated with any of the included materials and the terms, description, definition, and / or used in connection with this document, the terms used herein shall prevail.

[0216] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. A mode switching method of a natural cooling unit, characterized by, The method comprises: calculating the energy efficiency ratio of the natural cooling unit in the current mode; selecting the operation mode to be enabled according to the calculated energy efficiency ratio of the natural cooling unit in the current mode and the set switching strategy; the step of calculating the energy efficiency ratio of the natural cooling unit in the current mode comprises: measuring the refrigerating capacity of the natural cooling unit; collecting the real-time power consumption of the natural cooling unit; calculating the energy efficiency ratio of the natural cooling unit in the current mode according to the refrigerating capacity and the real-time power consumption by the following formula: energy efficiency ratio = refrigerating capacity / real-time power consumption; the step of measuring the refrigerating capacity of the natural cooling unit comprises: collecting the return air temperature, return air humidity, supply air temperature and supply air humidity of the natural cooling unit; calculating the supply-return air enthalpy difference according to the return air temperature, return air humidity, supply air temperature and supply air humidity; measuring the internal circulation air volume of the natural cooling unit; calculating the refrigerating capacity of the natural cooling unit according to the supply-return air enthalpy difference and the internal circulation air volume by the following formula: refrigerating capacity = supply-return air enthalpy difference * internal circulation air volume; the step of calculating the supply-return air enthalpy difference according to the return air temperature, return air humidity, supply air temperature and supply air humidity comprises: calculating the return air enthalpy value according to the return air temperature and the return air humidity; calculating the supply air enthalpy value according to the supply air temperature and the supply air humidity; calculating the supply-return air enthalpy difference according to the following formula: supply-return air enthalpy difference = return air enthalpy value - supply air enthalpy value.

2. The mode switching method of a natural cooling package according to claim 1, characterized by, the step of measuring the internal circulation air volume of the natural cooling unit comprises: detecting the pressure difference before and after the air guide ring of the internal circulation fan of the natural cooling unit; calculating the internal circulation air volume according to the pressure difference before and after the air guide ring and the size of the air guide ring by the following formula: internal circulation air volume = k * (pressure difference before and after the air guide ring)^0.5; wherein k is a coefficient related to the size of the air guide ring.

3. The mode switching method of a natural cooling package according to claim 1, characterized by, the step of selecting the operation mode to be enabled according to the calculated energy efficiency ratio of the natural cooling unit in the current mode and the set switching strategy comprises: judging whether the calculated energy efficiency ratio of the natural cooling unit in the current mode is less than the expected energy efficiency value of the target mode; if yes, switching the natural cooling unit to run in the target mode and calculating the energy efficiency ratio of the natural cooling unit in the target mode; judging whether the calculated energy efficiency ratio of the natural cooling unit in the target mode is greater than the calculated energy efficiency ratio before switching the natural cooling unit; if yes, keeping the natural cooling unit running in the target mode; if no, switching the natural cooling unit back to run in the mode before switching.

4. The mode switching method of a natural cooling package according to claim 1, characterized by, the step of selecting the operation mode to be enabled according to the calculated energy efficiency ratio of the natural cooling unit in the current mode and the set switching strategy comprises: inquiring in the database whether there is a target mode meeting the set condition; the set condition is that the refrigerating capacity of the target mode is greater than or equal to the sum of the refrigerating capacity of the natural cooling unit in the current mode and a first threshold value, and the energy efficiency ratio of the target mode is greater than or equal to the sum of the energy efficiency ratio of the natural cooling unit in the current mode and a second threshold value; if yes, switching the natural cooling unit to run in the target mode. If not, the natural cooling unit is kept running in the current mode.

5. The mode switching method of a natural cooling package according to claim 4, characterized by, The step of switching the natural cooling unit to run in the target mode comprises: determining whether the number of target modes meeting the set condition is one; If so, the natural cooling unit is switched to run in the target mode; If not, the natural cooling unit is switched to run in the target mode with the highest energy efficiency ratio.

6. A mode switching system of a natural cooling unit, characterized by, The system comprises: An energy efficiency ratio calculation module for calculating the energy efficiency ratio of the natural cooling unit in the current mode; A mode switching module for selecting the running mode to be enabled according to the calculated energy efficiency ratio of the natural cooling unit in the current mode and the set switching strategy; The energy efficiency ratio calculation module is specifically configured to: measure the refrigeration capacity of the natural cooling unit; collect the real-time power consumption of the natural cooling unit; calculate the energy efficiency ratio of the natural cooling unit in the current mode according to the refrigeration capacity and the real-time power consumption by the following formula: energy efficiency ratio = refrigeration capacity / real-time power consumption; The step of measuring the refrigeration capacity of the natural cooling unit performed by the energy efficiency ratio calculation module specifically comprises: collecting the return air temperature, return air humidity, supply air temperature and supply air humidity of the natural cooling unit; calculating the supply-return air enthalpy difference according to the return air temperature, return air humidity, supply air temperature and supply air humidity; measuring the internal circulation air volume of the natural cooling unit; calculating the refrigeration capacity of the natural cooling unit according to the supply-return air enthalpy difference and the internal circulation air volume by the following formula: refrigeration capacity = supply-return air enthalpy difference * internal circulation air volume; The step of calculating the supply-return air enthalpy difference according to the return air temperature, return air humidity, supply air temperature and supply air humidity performed by the energy efficiency ratio calculation module comprises: calculating the return air enthalpy value according to the return air temperature and the return air humidity; calculating the supply air enthalpy value according to the supply air temperature and the supply air humidity; calculating the supply-return air enthalpy difference according to the following formula: supply-return air enthalpy difference = return air enthalpy value - supply air enthalpy value.

7. A computer device, characterized by comprises: one or more controllers; a memory for storing one or more programs; The one or more programs are executed by the one or more controllers, so that the one or more controllers implement the natural cooling unit mode switching method according to any one of claims 1-5.

8. A computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the natural cooling unit mode switching method according to any one of claims 1-5.

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