A temperature control method and system based on central air conditioning

Abstract

The application discloses a temperature control method and system based on a central air conditioner and belongs to the technical field of air conditioner control, and the technical solution points of the application are as follows: according to current characteristic parameters of multiple sub-regions, a dynamic load adaptation degree corresponding to each sub-region is obtained; according to the dynamic load adaptation degree, a first sub-region and a second sub-region in the multiple sub-regions under a current sampling frame are determined; the amount of refrigerant medium to be delivered of the second sub-region is determined; and the determined amount of refrigerant medium to be delivered is delivered to the first sub-region through a self-control valve. When the temperature of the first sub-region needs to be adjusted, the application preferentially calls cold energy from other regions belonging to one split sub-region, and if the other regions cannot meet the demand of the first sub-region for the amount of refrigerant medium, the central control system adjusts the temperature of the refrigerant medium in a supply circuit and the temperature of the refrigerant medium in a recovery circuit, so that the temperature of the first sub-region is quickly adjusted, and the time delay caused by direct adjustment of the central control system is reduced.

Description

Technical Field

[0001] This invention relates to the field of air conditioning control technology, and more specifically to a temperature control method and system based on central air conditioning. Background Technology

[0002] In large buildings, such as hospitals or large laboratories, the efficient control of a central control system has always been a core issue of great concern. It not only directly affects the comfort level of the building's interior environment but is also closely related to the rational allocation of energy and the system's operational efficiency. Currently, the mainstream control model is centered on a central control system, which directly refers to the user's preset target temperature to carry out corresponding adjustments.

[0003] Specifically, existing central control systems are typically equipped with cooling units, also known as chillers, which in turn correspond to multiple air conditioning output zones, or hydraulic zones. Taking a building as an example, its lower, middle, and upper floors are often divided into three independent air conditioning output zones. When indoor temperature needs to be adjusted, the central control system first adjusts the refrigerant parameters in the supply circuit of the cooling units. Then, the cooling units, based on the adjusted refrigerant parameters, deliver chilled water to each air conditioning output zone. Each air conditioning output zone then distributes the chilled water to the specific area requiring temperature adjustment, thereby achieving the temperature change.

[0004] Obviously, there is a delay between the adjustment by the central control system and the user's area reaching the target temperature. For scenarios with extremely high requirements for temperature control accuracy and anti-interference capabilities, such as medical and laboratory settings, the delay in existing technologies cannot meet the needs of these scenarios, thus existing technologies have shortcomings. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a temperature control method and system based on central air conditioning. When it is necessary to adjust the temperature of the first sub-zone, the temperature of the first sub-zone can be quickly adjusted by transferring cooling energy from other zones, thereby reducing the time delay caused by direct adjustment by the central control system.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a temperature control method based on a central air conditioning system. The central air conditioning system includes multiple cooling unit units, each cooling unit corresponding to multiple air conditioning output zones, each air conditioning output zone corresponding to multiple sub-areas, and each sub-area controls the temperature of multiple sub-areas through corresponding central control valves and automatic control valves. The temperature control method includes:

[0008] In the current sampling frame, the dynamic load adaptability corresponding to each sub-region is obtained based on the current feature parameters of the multiple sub-regions;

[0009] If the dynamic load adaptability of at least one sub-region is greater than a preset threshold, the first sub-region and the second sub-region under the current sampling frame are determined in the current sampling frame according to the dynamic load adaptability, wherein the second sub-region delivers the amount of refrigerant medium to be delivered to the first sub-region by adjusting the corresponding self-control valve.

[0010] Within the current sampling frame, determine the amount of refrigerant medium to be delivered to the second sub-region, and deliver the determined amount of refrigerant medium to be delivered to the first sub-region through the self-control valve;

[0011] In the next sampling frame adjacent to the current sampling frame, the next sampling frame is used as the current sampling frame, and the determined amount of refrigerant to be delivered is re-delivered through the pipeline where the self-controlled valve is located.

[0012] As a further improvement of the present invention, determining the first sub-region and the second sub-region under the current sampling frame in the plurality of sub-regions based on the dynamic load adaptability includes:

[0013] Based on the dynamic load adaptability and the preset threshold, the adaptability level corresponding to the dynamic load adaptability is determined;

[0014] The first sub-region under the current sampling frame in the plurality of sub-regions is determined according to the adaptation level;

[0015] Based on the sub-regions corresponding to the first sub-region, determine the third sub-region corresponding to the first sub-region;

[0016] Based on the dynamic load adaptation value corresponding to the first sub-region, the second sub-region under the current sampling frame in the plurality of sub-regions is determined from the third sub-region.

[0017] As a further improvement of the present invention, the step of determining the second sub-region under the current sampling frame in the plurality of sub-regions from the third sub-region based on the dynamic load adaptation value corresponding to the first sub-region includes:

[0018] The required amount of refrigerant for the first sub-region is determined based on the dynamic load adaptability value corresponding to the first sub-region and the adaptability level corresponding to the dynamic load adaptability.

[0019] Based on the required cooling medium quantity of the first sub-region and the priority of the third sub-region, the second sub-region under the current sampling frame of the plurality of sub-regions is determined from the third sub-region.

[0020] As a further improvement of the present invention, determining the second sub-region under the current sampling frame from the plurality of sub-regions based on the required cooling medium amount of the first sub-region and the priority of the third sub-region includes:

[0021] The amount of refrigerant to be delivered for the third sub-region is obtained based on the first amount and priority of the refrigerant to be delivered for the third sub-region.

[0022] Based on the amount of refrigerant to be delivered corresponding to the third sub-region and the distance between the third sub-region and the first sub-region, the third sub-region is sorted to obtain the first list of refrigerant to be delivered;

[0023] The second sub-region is determined based on the amount of refrigerant to be delivered corresponding to the third sub-region and the first list of refrigerant to be delivered.

[0024] As a further improvement of the present invention, determining the second sub-region based on the amount of refrigerant to be delivered corresponding to the third sub-region and the first list of refrigerant to be delivered includes:

[0025] Based on the amount of refrigerant to be delivered corresponding to the third and the first list of refrigerant to be delivered, a fourth sub-region is determined, and there are multiple fourth sub-regions.

[0026] Determine whether there is a sub-region adjacent to the first sub-region in the fourth sub-region, and whether the fourth sub-regions are adjacent to each other;

[0027] If not, update the first list of transported cooling media, and determine the second sub-region based on the updated first list of transported cooling media.

[0028] As a further improvement of the present invention, after determining the amount of refrigerant to be delivered in the second sub-region, the temperature control method further includes adjusting the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit.

[0029] As a further improvement of the present invention, the adjustment of the refrigerant temperature in the supply circuit and the refrigerant temperature in the recovery circuit includes:

[0030] If the amount of refrigerant to be delivered in the second sub-region does not meet the demand for refrigerant in the first sub-region, the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit shall be adjusted according to the amount of refrigerant to be delivered in the second sub-region and the total flow rate of chilled water.

[0031] If the amount of refrigerant to be delivered in the second sub-region meets the demand for refrigerant in the first sub-region, the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit are adjusted according to the energy efficiency corresponding to the amount of refrigerant to be delivered.

[0032] As a further improvement of the present invention, adjusting the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit according to the amount of refrigerant to be delivered and the total flow rate of chilled water in the second sub-region includes:

[0033] The second amount of refrigerant to be delivered is determined based on the amount of refrigerant to be delivered in the second sub-region;

[0034] Determine the chilled water flow rate corresponding to the first sub-region based on the total chilled water flow rate;

[0035] The temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit are adjusted according to the second amount of refrigerant to be delivered and the flow rate of the chilled water.

[0036] As a further improvement of the present invention, the step of adjusting the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit according to the energy efficiency corresponding to the amount of refrigerant to be delivered includes:

[0037] Compare the energy efficiency corresponding to the amount of refrigerant to be delivered with the preset energy efficiency;

[0038] If the energy efficiency corresponding to the amount of refrigerant to be delivered is less than the preset energy efficiency, the amount of refrigerant to be delivered is updated according to the preset energy efficiency to obtain a third amount of refrigerant to be delivered;

[0039] Obtain the second list of delivery cooling media corresponding to the second sub-region;

[0040] The second sub-region is updated based on the third amount of refrigerant to be delivered and the second list of refrigerant to be delivered;

[0041] Based on the updated second sub-region, adjust the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit.

[0042] This invention provides a temperature control system based on a central air conditioning system, used to implement the aforementioned temperature control method based on a central air conditioning system, comprising:

[0043] The dynamic load adaptability generation module is used to obtain the dynamic load adaptability of each sub-region based on the current characteristic parameters of multiple sub-regions.

[0044] The sub-region determination module is used to determine the first sub-region and the second sub-region under the current sampling frame among the multiple sub-regions based on the dynamic load adaptation degree.

[0045] The temperature control module adjusts the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit according to the amount of refrigerant to be delivered in the second sub-region.

[0046] This invention, through the sub-regions to which the first sub-region belongs, first identifies a third sub-region belonging to the same sub-region when the temperature of the first sub-region needs to be adjusted, and then identifies a second sub-region that can provide cooling capacity to it. If the second sub-region cannot meet the refrigerant quantity required by the first sub-region, the central control system adjusts the refrigerant temperature in the supply circuit and the refrigerant temperature in the recovery circuit to meet the remaining demand of the first sub-region. Through the settings of this invention, the temperature of the first sub-region can be quickly adjusted, reducing the time delay caused by direct adjustment by the central control system and meeting the user's temperature requirements. Attached Figure Description

[0047] Figure 1 This is a flowchart of a temperature control method based on a central air conditioning system according to the present invention;

[0048] Figure 2 This is a structural diagram showing the division into sub-regions;

[0049] Figure 3 This is a schematic diagram showing the flow direction of chilled water in area A;

[0050] Figure 4 A schematic diagram showing the flow direction of chilled water in regions C and D;

[0051] Figure 5 This is a schematic diagram showing the flow direction of chilled water in areas B and D. Detailed Implementation

[0052] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof.

[0053] The term "and / or" in the following text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0054] In the central air conditioning systems disclosed in the exemplary technology, an integrated structural design is typically adopted. Compared with the separate structure in conventional technology where the chilled pump system, cooling pump system, and air conditioning unit system are set up independently, the core unit of this system is based on the above three key systems, together with the pipeline connection and efficient control system, to form a linkage integrated unit. The integrated design makes the coordination between the various systems closer, effectively reduces the connection loss in system operation, and simplifies the process for subsequent installation and commissioning.

[0055] In terms of the control system's functional configuration, the system is equipped with a scheduled start-up and shutdown module. Users can set the unit's start-up and shutdown times in advance through an intuitive human-machine interface. When the preset start-up time is reached, the control system automatically triggers the unit's startup procedure, ensuring that the unit is put into operation on time when needed. When the preset shutdown time is reached, the control system automatically executes the unit's shutdown procedure, fundamentally avoiding problems such as delayed shutdown or premature start-up that may be caused by human error, greatly improving the standardization and economy of system operation.

[0056] In addition, the control system also incorporates ambient temperature detection parameters, which enable dynamic adaptive adjustment of the refrigerant temperature in the target supply loop and the refrigerant temperature in the recovery loop of the air conditioning unit, so that the unit operation always maintains a precise match with the actual environmental requirements.

[0057] The specific adjustment logic is as follows: Taking an ambient temperature of 30℃ as an example, when the ambient temperature sensor detects a value of 30℃, the control system automatically adjusts the setpoint of the refrigerant temperature in the supply circuit to 9℃, and simultaneously adjusts the setpoint of the refrigerant temperature in the recovery circuit to 16℃; when the ambient temperature sensor detects a value of 35℃, the control system automatically lowers the setpoint of the refrigerant temperature in the supply circuit to 8℃, and lowers the setpoint of the refrigerant temperature in the recovery circuit to 15℃. Through real-time linkage adjustment of the ambient temperature with the refrigerant temperatures in the supply and recovery circuits, the unit's operating load can dynamically adapt to actual environmental demands, thereby minimizing ineffective energy consumption and improving energy efficiency. The system's startup sequence follows the logic of starting the cooling pump system, then the chilled water pump system, and finally the air conditioning unit system. The specific startup process is as follows: After the cooling pump unit starts, it will first start running at the initially set frequency; then the refrigeration pump unit will start and run at the same initially set frequency; after both pump units have entered a stable operating state, the air conditioning unit will start and begin running according to the refrigerant temperature set values ​​in the supply circuit and recovery circuit determined based on the ambient temperature.

[0058] The control system collects the operating load power of the air conditioning unit in real time and converts it into a load rate of 0-100%. 100% corresponds to the unit operating at full power, while 50% corresponds to the unit operating at 50% of its rated power. Under the premise of meeting the system's minimum operating flow rate, the cooling pump set and chilled water pump set automatically adjust their load allocation ratio according to the real-time load rate of the air conditioning unit: when the air conditioning unit load rate is 100%, the load allocation ratio of both the cooling pump set and the chilled water pump set is adjusted to 100%; when the air conditioning unit load rate is 70%, the load allocation ratio of both the cooling pump set and the chilled water pump set is adjusted to 80%.

[0059] The load adjustment methods for these two pump sets mainly include two types: one is frequency conversion adjustment, which achieves precise load adjustment by changing the operating frequency of the motor; the other is unit number adjustment, which changes the overall load by increasing or decreasing the number of pumps put into operation.

[0060] This embodiment simplifies the system installation and commissioning process through integrated design, reducing the time and cost of initial deployment; the scheduled control function effectively avoids the unit's ineffective operating time and reduces unnecessary energy consumption; by adjusting the refrigerant temperature in the supply and recovery circuits in conjunction with ambient temperature, dynamic matching between the unit's operating load and actual demand is achieved, further improving energy-saving performance; and the load linkage control between the pump unit and the main unit further optimizes energy consumption, thus achieving significant energy-saving goals overall.

[0061] It should be noted that the values ​​of temperature, load rate and load input ratio mentioned above are just examples. In actual applications, these values ​​can be flexibly adjusted according to the specific situation for different environmental areas (such as spaces of different sizes and different usage scenarios) and equipment with different performance. This embodiment does not impose any restrictions on this.

[0062] like Figure 1 As shown, in order to address the problem that existing technologies cannot meet the rapid adjustment needs of special scenarios such as medical and laboratory settings, this application provides a temperature control method based on central air conditioning, including:

[0063] In the current sampling frame, the dynamic load adaptation degree corresponding to each sub-region is obtained based on the current feature parameters of multiple sub-regions;

[0064] If the dynamic load adaptability of at least one sub-region is greater than a preset threshold, the first sub-region and the second sub-region under the current sampling frame are determined in the current sampling frame according to the dynamic load adaptability. The second sub-region delivers the amount of refrigerant medium to be delivered to the first sub-region by adjusting the corresponding self-control valve.

[0065] Within the current sampling frame, determine the amount of refrigerant medium to be delivered in the second sub-region, and deliver the determined amount of refrigerant medium to be delivered to the first sub-region through a self-controlled valve;

[0066] In the next sampling frame adjacent to the current sampling frame, the next sampling frame is used as the current sampling frame, and the determined amount of refrigerant to be delivered is re-delivered through the pipeline where the self-controlled valve is located.

[0067] Central air conditioning includes cooling units, piping networks, and a central control system. Cooling units generate cooling capacity, piping networks consist of multiple pipes (connecting pipes) for transmitting cooling capacity, which is the amount of refrigerant. The central control system is responsible for the operation of the central air conditioning system. Cooling capacity refers to the energy used to cool objects or spaces per unit time. The transmission of cooling capacity is not the flow of cooling capacity itself, but rather the equivalent transmission of cooling capacity is achieved through the transmission of chilled water.

[0068] For example, a central air conditioning system within a building may include one or more cooling unit units. For instance, a large shopping mall or office building requires multiple cooling unit units, while a small office building requires only one. Each cooling unit corresponds to multiple air conditioning output zones. For example, an office building may be divided into low-rise, mid-rise, and high-rise sections, each designated as a separate air conditioning output zone. In this embodiment, each cooling unit is independent, and each air conditioning output zone is also independent. That is, the cooling capacity transfer within each air conditioning output zone will not affect other air conditioning output zones, and each air conditioning output zone... The covered area can be the same or different in size. In this embodiment, each air conditioning output zone is divided into multiple sub-zones. For example, when an air conditioning output zone includes multiple floors, each floor is considered a sub-zone. Each sub-zone is independent and includes multiple sub-zones. For example, in a medical setting, a floor (sub-zone) may include operating rooms, preparation rooms, and instrument sterilization rooms (sub-zones). Preferably, to reduce the loss of cold air transfer between sub-zones, reduce the complexity of control, and improve the efficiency of cold air transfer, each sub-zone should include fewer sub-zones, such as 3-5 sub-zones. This embodiment will only use one cooling unit and one sub-zone as an example for subsequent descriptions. When other sub-zones encounter the same problem, the same method can be used to solve it.

[0069] For example, such as Figure 2As shown, assume that sub-region A includes four regions: A, B, C, and D (i.e., four sub-regions). The cooling unit is connected to each air conditioning output zone (air conditioning output zone A, air conditioning output zone B, air conditioning output zone C, and air conditioning output zone D) via the refrigerant main pipe in the supply loop. Each air conditioning output zone is connected to each sub-region (for example, air conditioning output zone B is connected to sub-regions A and B). Figure 2 Placing each air conditioning output zone and each sub-zone on the same horizontal line is only to illustrate the hierarchical and connection relationships between air conditioning output zones and sub-zones, not to illustrate the positional relationships between air conditioning output zones and sub-zones. In reality, when dividing air conditioning output zones and sub-zones according to floors, multiple air conditioning output zones and multiple sub-zones are arranged vertically. Each sub-zone corresponds to one central control valve and one automatic control valve (for example, zone A corresponds to one central control valve A and one automatic control valve A). Adjusting the corresponding central control valve can only control the cooling capacity input to each sub-zone itself. There are connecting pipes between the automatic control valves (indicated by dashed lines). By adjusting the automatic control valves, the cooling capacity input to each sub-zone and other sub-zones can be controlled simultaneously. The pipes between the automatic control valves are equipped with water pumps with bidirectional flow capability, such as centrifugal pumps, which can transfer cooling capacity in different directions. For example, through the water pump in the pipe between the automatic control valves corresponding to zones A and B, the direction of chilled water can be controlled, thereby realizing the transfer of cooling capacity between zones A and B.

[0070] For each sub-region, its corresponding third sub-region is the sub-region located within the same sub-region. For example, the third sub-regions of region A are regions B, C, and D. When the temperature of region A needs to be adjusted, the first step is to determine the second sub-region from the third sub-region based on the load value of region A. Then, based on the amount of refrigerant to be delivered in the second sub-region, cooling capacity is transferred to region A by adjusting the self-control valve. If the amount of refrigerant to be delivered in the second sub-region cannot meet the needs of region A, the central control system adjusts the temperature of the refrigerant in the supply loop and the temperature of the refrigerant in the recovery loop to ultimately regulate the temperature of region A. In this embodiment, the load value of each sub-region is a cooling load value. For example, for the first sub-region (region A), the cooling load value refers to the amount of heat that needs to be removed from region A per unit time. If the temperature in region A needs to be kept constant, the cooling load value should be equal to the cooling capacity, that is, the amount of heat that needs to be removed from region A per unit time is equal to the energy provided by the chilled water for cooling region A per unit time.

[0071] The adjustment of the central control valve and the automatic control valve is mainly carried out by the sub-regions. Specifically, each sub-region is equipped with a dynamic load adaptability generation module, a sub-region determination module, a control module, and a communication module. The dynamic load adaptability generation module is used to acquire the feature parameters collected by the sensors and obtain the dynamic load adaptability corresponding to each sub-region. The sub-region determination module is used to determine the first sub-region and the second sub-region under the current sampling frame among multiple sub-regions based on the dynamic load adaptability. The control module is used to adjust the angle of the central control valve and the automatic control valve to adjust the temperature of the first sub-region. The communication module is used to transmit the feature parameters, dynamic load adaptability, and adjustment angle to the central control system for storage. When the amount of refrigerant to be delivered in the second sub-region does not meet the demand of the first sub-region, it sends a request to the central control system so that the temperature control module in the central control system can adjust the temperature of the refrigerant in the supply loop and the temperature of the refrigerant in the recovery loop.

[0072] In this embodiment, when the temperature of the first sub-region needs to be adjusted, a third sub-region belonging to the same sub-region is first identified, and a second sub-region that can provide cooling capacity is then determined from among them. If the second sub-region cannot meet the required amount of refrigerant for the first sub-region, the central control system adjusts the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit to meet the remaining demand of the first sub-region. Through the settings of this invention, the temperature of the first sub-region can be quickly adjusted, reducing the time delay caused by direct adjustment by the central control system and meeting the user's temperature requirements.

[0073] Furthermore, this embodiment provides a step for determining the first and second sub-regions under the current sampling frame among multiple sub-regions based on dynamic load adaptability, including:

[0074] The adaptation level corresponding to the dynamic load adaptability is determined based on the dynamic load adaptability and the preset threshold.

[0075] The first sub-region under the current sampling frame is determined based on the adaptation level among multiple sub-regions;

[0076] Based on the sub-regions corresponding to the first sub-region, determine the third sub-region corresponding to the first sub-region;

[0077] Based on the load value corresponding to the first sub-region, determine the second sub-region under the current sampling frame from multiple sub-regions in the third sub-region.

[0078] Prior to this step, the dynamic load adaptability of each sub-region is obtained based on the current characteristic parameters of multiple sub-regions. The characteristic parameters include temperature, chilled water flow rate, and equipment load value.

[0079] Specifically, each sub-region is equipped with sensors, such as temperature sensors, flow sensors, and personnel density sensors. The flow sensors collect the flow rate of chilled water, while the personnel density sensors, which can be based on infrared sensing, obtain the personnel density within the sub-region. The interval between two adjacent sampling frames can be selected according to actual conditions; this embodiment does not impose any restrictions on this. The sensors transmit the collected data to the dynamic load adaptability generation module in each sub-region. The dynamic load adaptability generation module calculates the data change rate of the current sampling frame compared to the adjacent previous sampling frame, such as the temperature change rate, flow rate change rate, and density change rate. In addition, the dynamic load adaptability generation module can also obtain the usage status of equipment (such as experimental equipment) in each region, thereby obtaining the equipment load value change rate in that region. The equipment load value refers to the heat generated by the equipment during operation, which can be calculated using power and heat dissipation efficiency. The calculation method for the aforementioned change rate is a common technique used by those skilled in the art, and will not be detailed in this embodiment.

[0080] After obtaining the aforementioned rates of change (temperature rate of change, flow rate of change, density rate of change, and equipment load rate of change) through the collected feature parameters, different weights can be set for each rate of change. Finally, the dynamic load adaptability of each sub-region is obtained by weighting. In this embodiment, the value of the weights is not specifically limited. Those skilled in the art can set them according to different sub-regions. For example, for the operating room, the weight corresponding to the temperature rate of change can be increased.

[0081] After obtaining the dynamic load adaptability, the dynamic load adaptability is compared with a preset threshold to determine the adaptability level corresponding to the dynamic load adaptability. For example, three preset thresholds can be set. , and ,in When the value of dynamic load adaptability is less than or equal to When the dynamic load adaptability corresponds to a low adaptability level, no temperature adjustment is performed for that sub-region; conversely, when the dynamic load adaptability value is greater than a certain threshold, no temperature adjustment is performed. When the dynamic load adaptability corresponds to a high adaptability level, the sub-region corresponding to the high adaptability level dynamic load adaptability is ultimately used as the first sub-region, and subsequent steps are executed.

[0082] This embodiment determines the first sub-region and adjusts the temperature by monitoring changes in characteristic parameters. It does not require waiting for the user to adjust the temperature before adjustment, thus reducing the time required for temperature adjustment. Furthermore, this embodiment is only applicable to cooling scenarios.

[0083] Furthermore, this embodiment provides a method for determining a second sub-region under the current sampling frame from multiple sub-regions based on the load value corresponding to the first sub-region, including:

[0084] The required amount of refrigerant for the first sub-region is determined based on the load value corresponding to the first sub-region and the adaptation level corresponding to the dynamic load adaptation.

[0085] Based on the required cooling medium quantity of the first sub-region and the priority of the third sub-region, the second sub-region under the current sampling frame is determined from multiple sub-regions in the third sub-region.

[0086] Specifically, referring to the example above, the value of dynamic load adaptability should be greater than... After determining the first sub-region as the first sub-region, we continue to determine the fitness level corresponding to the first sub-region, for example, placing the value in the range of... and The sub-regions between these points are designated as low-fit-level sub-regions, with values ​​located in... and The sub-regions between these are designated as high-fitness-level sub-regions. For example, for a high-fitness-level sub-region, the corresponding cooling capacity is first determined based on the current load value of the first sub-region. The current load value can be determined based on the temperature, number of people, and equipment power within the sub-region. The calculation of the load value is a conventional technique, which will not be elaborated upon in this embodiment. Next, the initial temperature is obtained, which is the target temperature after cooling the first sub-region. Based on the current load value and the initial temperature, the cooling capacity corresponding to the current load value can be obtained. This cooling capacity is then subtracted from the cooling capacity it can provide to obtain the required refrigerant quantity. The cooling capacity it can provide can be determined based on the temperature and flow rate of the chilled water flowing into it. For a low-fitness-level sub-region, the corresponding cooling capacity is calculated using the same method, and the cooling capacity it can provide is subtracted. A portion of the result is used as the required refrigerant quantity for the low-fitness-level sub-region. For example, if the calculated result is... The required amount of refrigerant is , ,in This coefficient is used to adjust the refrigerant demand of sub-regions with low compatibility levels, and its purpose is to preliminarily calculate the cooling capacity of these sub-regions. proportionally The data is extracted, and subsequent steps are performed based on the required amount of refrigerant. This embodiment describes... The specific value is not limited, and those skilled in the art can determine it according to the actual situation.

[0087] In this embodiment, before the user adjusts the temperature, the priority of the first sub-region is determined by the dynamic load adaptability monitored in real time. The required amount of refrigerant is adjusted according to the priority, so as to give priority to meeting the cooling demand of the sub-region with high adaptability level and avoid the system from overloading. Then, the second sub-region is determined according to the required amount of refrigerant, and the second sub-region is responsible for the transfer of cooling capacity.

[0088] Furthermore, this embodiment provides a method for determining a second sub-region under the current sampling frame from multiple sub-regions based on the required cooling medium quantity of the first sub-region and the priority of the third sub-region, including:

[0089] Based on the first amount of refrigerant to be delivered and the priority of the third sub-region, the amount of refrigerant to be delivered for the third sub-region is obtained.

[0090] Based on the amount of refrigerant to be delivered corresponding to the third sub-region and the distance between the third sub-region and the first sub-region, sort the third sub-regions to obtain the first list of refrigerant to be delivered.

[0091] The second sub-region is determined based on the amount of refrigerant to be delivered corresponding to the third sub-region and the first list of refrigerant to be delivered.

[0092] Specifically, firstly, based on the priority of the third sub-region and the first amount of refrigerant to be delivered, the amount of refrigerant to be delivered for each third sub-region is determined. The first amount of refrigerant to be delivered is the remaining refrigerant after the current cooling capacity of each third sub-region meets its own cooling needs. The required cooling capacity needs to be calculated based on its own load value, which is calculated in the same way as the load value of the first sub-region. This embodiment will not elaborate on this method. The priority of the third sub-region can be determined according to the type of region. For example, for a sub-region including an operating room, preparation room, and instrument sterilization room, the operating room region has a lower priority, and the preparation room has a higher priority. For the lower-priority third sub-region... In each sub-region, a lower weighting coefficient is set. For higher-priority third sub-regions, a higher weighting coefficient is set to avoid affecting lower-priority but more important third sub-regions, ensuring they retain sufficient cooling capacity to meet their subsequent needs. Then, the weighting coefficient of each third sub-region is multiplied by the first amount of refrigerant to be delivered to obtain the amount of refrigerant to be delivered for each third sub-region. Next, another weighting coefficient is set based on the distance between the third and first sub-regions. This distance can be calculated based on the pipe length between the third and first sub-regions; the greater the distance, the smaller the weighting coefficient. Based on the amount of refrigerant to be delivered and the distance to the first sub-region, the score for each third sub-region can be obtained as follows:

[0093]

[0094]

[0095] in, Indicates the first The score of the third sub-region and They represent the first The third sub-region is assigned a score based on the amount of refrigerant to be delivered and its distance from the first sub-region. The more refrigerant to be delivered, the higher the score, and the farther the distance from the first sub-region, the lower the score. This embodiment does not limit the specific value of the score; for example, each score can be set in the range of 0-10. and They are respectively and The corresponding weighting coefficients, For the first The first amount of refrigerant to be delivered in the third sub-region The corresponding weight coefficient can be determined based on the priority of the third sub-region, that is, based on the type of the third sub-region. For the first The amount of refrigerant to be delivered in the third sub-region, wherein the weight value is not limited in this embodiment, and those skilled in the art can determine it according to actual needs.

[0096] Finally, based on the scores of each third sub-region, the third sub-regions are sorted from largest to smallest to obtain a first list of transported refrigerant media. Then, according to the order in the first list, at least one third sub-region is selected sequentially until the total amount of refrigerant media to be transported from the selected third sub-regions exceeds the required amount of refrigerant media from the first sub-region, and the excess should exceed a threshold. Furthermore, since the self-control valves of sub-regions that do not perform inter-regional cold energy transfer are fully open, if other sub-regions transfer cold energy to the first sub-region via these sub-regions, it will cause a significant loss of cold energy. Therefore, this embodiment further filters the already selected third sub-regions.

[0097] Specifically, the selected third sub-region is designated as the fourth sub-region. First, it's necessary to determine if the fourth sub-region contains any regions adjacent to the first sub-region. For example... Figure 2 If the only sub-regions adjacent to region A are regions B and D, then determine whether the fourth sub-regions are adjacent. For example, if the fourth sub-region is region B and region D, then regions B and D are not adjacent.

[0098] The above screening steps need to be determined for cases with a large number of regions. For example, according to the above description, in this embodiment, it is preferable that the number of sub-regions within the sub-regions can be 3-5. When the number of sub-regions is 3, the cold energy will not pass through the sub-regions that do not carry out cold energy transfer between sub-regions. Therefore, there is no need to perform the above screening steps again, and the fourth sub-region can be directly used as the second sub-region.

[0099] When there are 4 or 5 sub-regions, if only one fourth sub-region is selected, it is only determined whether there is a sub-region adjacent to the first sub-region. If so, the fourth sub-region is designated as the second sub-region; otherwise, it is removed from the first list of transported cooling media, resulting in an updated first list of transported cooling media. The fourth sub-region is then selected again, and the determination process is repeated until a fourth sub-region that meets the determination criteria is selected and designated as the second sub-region. For 4 sub-regions, if two fourth sub-regions are selected, the cooling capacity will not pass through sub-regions where inter-sub-region cooling capacity transfer does not occur. For example, if... Figure 2 Region A is the first sub-region, and the fourth sub-regions are regions B and D. Regions B and D transfer cooling energy from both sides of region A, and will not pass through sub-regions that do not transfer cooling energy between sub-regions. If an adjacent region is region B and region C, then regions B and C transfer cooling energy from right to left, and will not pass through sub-regions that do not transfer cooling energy between sub-regions. Therefore, when there are 4 sub-regions and at least two fourth sub-regions are selected, there is no need to perform the above-mentioned second filtering step, and the fourth sub-region can be directly used as the second sub-region.

[0100] When there are 5 sub-regions and two fourth sub-regions are selected, if both fourth sub-regions are adjacent to the first sub-region, that is, the two selected fourth sub-regions are located on either side of the first sub-region, similar to... Figure 2Regions B and D are located on either side of region C. Therefore, the re-selection step described above is unnecessary; the fourth sub-region is directly selected as the second sub-region. If one of the two fourth sub-regions is adjacent to the first sub-region, the two fourth sub-regions are then compared. If they are adjacent, the two selected fourth sub-regions are selected as the second sub-region. If not, the non-adjacent sub-regions are removed from the first list of transported cooling media, resulting in an updated first list of transported cooling media. The fourth sub-region is then selected again, and the comparison process is repeated. If no sub-region is adjacent to the first sub-region, the sub-region with the lowest score among the two fourth sub-regions is removed from the first list of transported cooling media, resulting in an updated first list of transported cooling media. The fourth sub-region is then selected again, and the comparison process is repeated until a fourth sub-region that meets the comparison criteria is selected and selected as the second sub-region. If there are more fourth sub-regions, for example, if there are three fourth sub-regions, then in the case where all three fourth sub-regions are adjacent to the first sub-region, two of the fourth sub-regions are located on either side of the first sub-region, and the remaining sub-region is adjacent to one of the two fourth sub-regions. In the case where three fourth sub-regions are adjacent, the three sub-regions are linked together in a chain. Figure 2 Regions A, B, and C are adjacent, although regions A and C are not directly adjacent, they can be connected through region B. The determination of adjacency is based on positional relationship and is unrelated to their presence in the first list of transported refrigerant media. If the number of regions increases or a fourth sub-region is selected, the above method can still be used; this embodiment will not elaborate further.

[0101] Specifically, the portion of the total amount of refrigerant to be transported in the second sub-region that exceeds the required amount of refrigerant in the first sub-region should be greater than a threshold value. This ensures that the excess can be used to compensate for losses during the cold energy transfer process. These losses refer to the losses caused by the refrigerant flowing into other sub-regions. For this threshold value, those skilled in the art can set it based on the transmission distance and the heat dissipation of the pipeline, or, to save adjustment time, set a fixed threshold, such as 20% of the required amount of refrigerant. This embodiment does not impose such limitations. If a fourth sub-region that meets the judgment criteria is ultimately not selected, or if the total amount of refrigerant to be transported in the second sub-region is still less than or equal to the required amount of refrigerant in the first sub-region, or if the portion of the total amount of refrigerant to be transported in the second sub-region that exceeds the required amount of refrigerant in the first sub-region is less than or equal to the threshold value, then each third sub-region corresponding to the first sub-region is considered a second sub-region.

[0102] Based on the above analysis, it can be summarized that the steps provided in this embodiment for determining the second sub-region according to the amount of refrigerant to be delivered corresponding to the third sub-region and the first list of refrigerant to be delivered include:

[0103] The fourth sub-region is determined based on the amount of refrigerant to be delivered corresponding to the third sub-region and the first list of refrigerant to be delivered. There are multiple fourth sub-regions.

[0104] Determine whether there is a sub-region in the fourth sub-region that is adjacent to the first sub-region, and whether the fourth sub-regions are adjacent to each other;

[0105] If not, update the first list of delivered cooling media, and determine the second sub-region based on the updated first list of delivered cooling media.

[0106] This embodiment first determines the amount of refrigerant to be delivered to each third sub-region based on its priority and the amount of refrigerant to be delivered. This allows sub-regions with lower priority to retain more cooling capacity to meet their subsequent needs. Simultaneously, by combining the amount of refrigerant to be delivered to each third sub-region with its distance from the first sub-region, a score is calculated for each sub-region. Further filtering of the fourth sub-region is then performed through a judgment step, ultimately resulting in the second sub-region. This allows the second sub-region to transfer cooling capacity to the first sub-region in a shorter time with lower losses. Through the steps of this embodiment, the second sub-region can be selected for cooling capacity transfer based on the dynamic load adaptability of the first sub-region before the user selects to adjust the temperature. Compared to temperature adjustment by a central control system based on the user's selected temperature, the method provided in this embodiment reduces the time required for cooling capacity to arrive, thus meeting the user's temperature requirements.

[0107] Furthermore, after determining the amount of refrigerant to be delivered in the second sub-region, the above-mentioned temperature control method based on central air conditioning also includes adjusting the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit.

[0108] Furthermore, this embodiment provides a step for adjusting the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit, including:

[0109] If the amount of refrigerant to be delivered in the second sub-region does not meet the refrigerant demand of the first sub-region, the refrigerant temperature in the supply loop and the refrigerant temperature in the recovery loop shall be adjusted according to the amount of refrigerant to be delivered in the second sub-region and the total flow rate of chilled water.

[0110] If the amount of refrigerant to be delivered in the second sub-region meets the refrigerant demand of the first sub-region, the refrigerant temperature in the supply circuit and the refrigerant temperature in the recovery circuit are adjusted according to the energy efficiency corresponding to the amount of refrigerant to be delivered.

[0111] The step of determining whether the amount of refrigerant to be delivered in the second sub-region can meet the demand for refrigerant in the first sub-region is as follows: determine whether the sum of the amounts of refrigerant to be delivered in the selected second sub-regions can be greater than the demand for refrigerant in the first sub-region, and whether the greater portion can exceed a threshold. If it can, it means that the second sub-region can meet the demand for refrigerant in the first sub-region; otherwise, it cannot.

[0112] If the required amount of refrigerant in the first sub-region can be met, the energy efficiency of cold transfer through the second sub-region needs to be further considered. Based on the energy efficiency, it is determined whether the central control system needs to adjust the temperature of the refrigerant in the supply loop and the temperature of the refrigerant in the recovery loop. If the required amount of refrigerant cannot be met, the central control system must intervene to adjust the temperature of the refrigerant in the supply loop and the temperature of the refrigerant in the recovery loop.

[0113] Furthermore, this embodiment provides a step of adjusting the temperature of the refrigerant in the supply loop and the temperature of the refrigerant in the recovery loop based on the amount of refrigerant to be delivered and the total flow rate of chilled water in the second sub-region, including:

[0114] The amount of the second refrigerant to be delivered is determined based on the amount of refrigerant to be delivered in the second sub-region.

[0115] Determine the chilled water flow rate corresponding to the first sub-region based on the total chilled water flow rate;

[0116] Adjust the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit according to the amount of the second refrigerant to be delivered and the flow rate of chilled water.

[0117] Specifically, firstly, the total amount of refrigerant to be delivered corresponding to all selected second sub-regions is calculated. Then, the total amount of refrigerant to be delivered corresponding to the second sub-region is subtracted from the total amount of refrigerant to be delivered for the first sub-region and the threshold, to obtain the second amount of refrigerant to be delivered. The second amount of refrigerant to be delivered is the amount of cooling that needs to be provided through the regulation of the central control system. The threshold is the threshold used to compensate for the loss during the cooling process, and the specific determination method has been described above. This implementation will not repeat it here.

[0118] The total chilled water flow rate is the flow rate of chilled water transmitted from the sub-regions corresponding to the first sub-region, for example, such as... Figure 2As shown, the chilled water supplied by the cooling unit reaches each air conditioning output zone through the refrigerant main pipe in the supply loop. Each air conditioning output zone then supplies chilled water to each sub-zone, and so on. Therefore, each sub-zone only receives a portion of the chilled water. Consequently, the chilled water flow rate for each sub-zone needs to be calculated based on the total chilled water flow rate and the proportion of the total chilled water flow reaching each sub-zone. Therefore, the refrigerant temperature in the supply loop that meets the requirements of the second refrigerant quantity to be supplied is first calculated based on the second refrigerant quantity to be supplied. for:

[0119]

[0120] in, The second quantity of refrigerant to be delivered. The specific heat capacity of water, The density of water, This represents the chilled water flow rate corresponding to the first sub-region. The temperature of the refrigerant in the regulated recovery loop is 3.6, which is a unit conversion factor. Since the unit of cooling capacity is usually kilojoules per second, while the unit of flow rate is usually cubic meters per hour, a unit conversion factor is introduced to unify the time unit.

[0121] The adjustment of the refrigerant temperature in the recovery loop is relative to the current refrigerant temperature in the recovery loop. For example, if the current dynamic load adaptability value is high, it means that the current refrigerant temperature in the recovery loop is already higher than the preset refrigerant temperature in the recovery loop. In this case, adjusting the refrigerant temperature in the recovery loop means increasing the cooling capacity transmitted by the cooling unit by lowering the refrigerant temperature in the supply loop, thereby reducing the already elevated refrigerant temperature in the recovery loop to the preset refrigerant temperature in the recovery loop. Therefore, the adjusted refrigerant temperature in the recovery loop should be known. The preset refrigerant temperature in the recovery loop can be determined according to the actual scenario. For example, the refrigerant temperature in the recovery loop should be set between 12-19℃. This embodiment does not impose any restrictions on this.

[0122] Furthermore, this embodiment provides a step of adjusting the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit according to the energy efficiency corresponding to the amount of refrigerant to be delivered, including:

[0123] Compare the energy efficiency corresponding to the amount of refrigerant to be delivered with the preset energy efficiency;

[0124] If the energy efficiency corresponding to the amount of refrigerant to be delivered is less than the preset energy efficiency, the amount of refrigerant to be delivered is updated according to the preset energy efficiency to obtain the third amount of refrigerant to be delivered.

[0125] Obtain the second list of cooling media for the second sub-region;

[0126] Update the second sub-region based on the third quantity of refrigerant to be delivered and the second list of refrigerant to be delivered;

[0127] Adjust the refrigerant temperature in the supply loop and the refrigerant temperature in the recovery loop according to the updated second sub-region.

[0128] Specifically, firstly, the total amount of refrigerant to be transported corresponding to all selected second sub-regions is calculated. The energy efficiency is determined based on the effective cooling capacity received by the first sub-region and the energy consumption used for transmission, specifically equal to the effective cooling capacity divided by the energy consumption. The effective cooling capacity received by the first sub-region is equal to the total amount of refrigerant to be transported corresponding to the second sub-region minus the cooling capacity lost during transmission. Based on the pipe heat dissipation formula, the cooling capacity lost during transmission can be determined based on the pipe's heat transfer coefficient, surface area, and temperature difference between the inside and outside of the pipe. The temperature inside the pipe can be approximated as the temperature of the refrigerant in the current supply loop, and the temperature outside the pipe can be collected by sensors. The energy consumption used for transmission is the equipment energy consumption during cooling capacity transmission, including the energy consumption of the water pump used to drive the cooling capacity transmission and the energy consumption of adjusting the valve angle. Specifically, it can be calculated based on the power and operating time of the equipment (water pump and valve).

[0129] Next, the calculated energy efficiency is compared with the preset energy efficiency. If it is greater than or equal to the preset energy efficiency, the current scheme is executed, that is, cold energy is transferred according to the selected second sub-region. If it is less than the preset energy efficiency, the amount of refrigerant to be transferred is updated according to the preset energy efficiency, that is, the preset energy efficiency is multiplied by the energy consumption used for transfer to obtain the third amount of refrigerant to be transferred. Then, the second sub-region is updated according to the third amount of refrigerant to be transferred, and the temperature of the refrigerant in the supply loop and the temperature of the refrigerant in the recovery loop are adjusted. The purpose of this embodiment is to reduce the time required to lower the temperature of the first sub-region. That is, some energy efficiency can be sacrificed to reduce the time. Therefore, preferably, the preset energy efficiency can be set to a small value so that the calculated energy efficiency has a high probability of meeting the judgment condition, thereby avoiding the need to adjust the temperature of the refrigerant in the supply loop and the temperature of the refrigerant in the recovery loop through the central control system, and further reducing the time required to lower the temperature of the first sub-region. However, this embodiment does not limit the specific value of the preset energy efficiency.

[0130] Specifically, after obtaining the third amount of refrigerant to be delivered, a second list of refrigerant to be delivered corresponding to the second sub-region is obtained. The position of the second sub-region in the second list of refrigerant to be delivered is the same as its position in the first list of refrigerant to be delivered. Then, the second list of refrigerant to be delivered is traversed sequentially, and at least one second sub-region is selected in turn, until the sum of the amounts of refrigerant to be delivered corresponding to all the selected second sub-regions is greater than the third amount of refrigerant to be delivered, and the greater part should exceed a threshold. The specific steps are similar to the steps for obtaining the second sub-region described above, and will not be repeated here in this embodiment. The selected second sub-region is used as the updated second sub-region.

[0131] Next, the difference between the third amount of refrigerant to be delivered and the sum of the amounts of refrigerant to be delivered corresponding to the second sub-region before the update is calculated, and the absolute value of the difference is taken as the updated amount of the second amount of refrigerant to be delivered. Then, the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit are adjusted according to the updated amount of the second amount of refrigerant to be delivered. The specific steps are the same as the adjustment steps described above, and will not be repeated here.

[0132] To further illustrate the method provided in the embodiments of this application, the following is based on... Figure 2 The structural diagram of the subdivided sub-regions shown is further illustrated. For example, it is assumed that subdivided sub-region A is responsible for four sub-regions A, B, C and D. The cooling unit is connected to each air conditioning output zone through the refrigerant main pipe in the supply circuit, and the refrigerant main pipe in the supply circuit includes a regulating valve to control the flow rate of chilled water. In this embodiment, it is assumed that the angle of the regulating valve remains unchanged, that is, the total flow rate of chilled water remains unchanged. When no cold energy transfer occurs between sub-regions, the automatic control valves corresponding to each sub-region are fully open. Alternatively, for sub-regions that are not the first or second sub-region and do not involve cold energy transfer between sub-regions, their corresponding automatic control valves are fully open. The temperature within the region is maintained by adjusting the size of the central control valve. That is, chilled water passes through the automatic control valves and the central control valve in sequence to reach the corresponding sub-regions and exchanges temperature with the air within the sub-regions, releasing cold energy into the room to maintain the temperature within the sub-regions near the initial temperature. Obviously, the cold energy is proportional to the flow rate of chilled water flowing through region A. Based on the current flow rate of chilled water flowing through region A, the specific heat capacity of water, and the temperature difference between the chilled water and the room temperature of region A, the current cold energy that region A can provide can be obtained.

[0133] For example, Figure 3This shows the chilled water flow direction when the central control valve and automatic control valve corresponding to area A are fully open (when rotated 90 degrees upwards from the horizontal line). The arrows indicate the chilled water flow direction, the thicker lines represent valves, the one at the top is the automatic control valve, and the one at the bottom is the central control valve. The automatic control valve consists of two symmetrically arranged valves, each with an adjustment angle of 180 degrees.

[0134] Suppose that the number of people entering area A suddenly increases, causing the rate of change of temperature and density in area A to increase. The cooling capacity that area A can currently provide is not enough to reduce the temperature of area A to the initial temperature, which in turn leads to an increase in dynamic load adaptability, the temperature of the refrigerant in the recovery loop and the load value. In this embodiment, the initial temperature is not limited, for example, the initial temperature can be set to 25°C.

[0135] If calculated based on the data currently collected by the sensors, the current dynamic load adaptability is located at... and In this context, region A is a low-fitness sub-region, and its current refrigerant demand can be calculated based on its corresponding load value. Next, the refrigerant demand for each third sub-region is calculated, resulting in a first refrigerant delivery list. Based on this list, a second sub-region is selected. Assuming the selected second sub-regions are regions C and D, and the combined refrigerant demand from these two sub-regions meets the refrigerant demand of the first sub-region, the angles of the corresponding automatic control valves in regions C and D need to be adjusted based on their respective refrigerant demand. This allows more chilled water to reach region A, achieving cold air transfer without requiring adjustment of the refrigerant temperature in the supply loop through the central control system. Specifically, since region B does not perform cold air transfer, its automatic control valves are not adjusted. The angles that the corresponding automatic control valves in regions C and D need to be adjusted are then calculated based on their respective refrigerant demand. Specifically, regions C and D can calculate the required chilled water flow rate to maintain their constant temperature based on their load values. Then, using the orifice flow rate formula from fluid mechanics, the appropriate valve angle can be obtained when the chilled water flow rate entering the region equals the required chilled water flow rate to maintain its constant temperature. The orifice flow rate formula is:

[0136]

[0137] in, This indicates the flow rate of chilled water required to maintain a constant temperature. The pressure difference across the valve can be measured using a pressure sensor. This indicates the density of water. The flow coefficient of the valve is calculated using the formula above. Then, based on the valve flow characteristic curve or table provided by the valve manufacturer, the valve angle corresponding to the coefficient can be obtained by querying the curve or table, that is, the angle after adjustment of the self-control valve. Based on this, the angle after adjustment of the self-control valve corresponding to region C and region D can be obtained.

[0138] like Figure 4 As shown, after angle adjustment, since there are connecting pipes between areas A, C, and D, and the water pumps located in the pipes need to be adjusted according to the transmission direction between areas C and D, so that the chilled water flows to area A, only a portion of the chilled water reaching the self-control valve in area C can pass through the self-control valve to meet its own needs. The remaining portion will reach area D through the connecting pipe between the self-control valves in areas C and D, and then finally reach area A through the connecting pipe between D and A, thus realizing the transfer of cooling capacity from area C to area A. Similarly, area D transfers cooling capacity to area A through the connecting pipe between D and A. However, when the chilled water transferred from area C passes through the self-control valve in area D, a small portion will flow into area D, causing transmission loss. Therefore, in this embodiment, when selecting the second sub-area, the total amount of refrigerant to be transported in the second sub-area should be greater than the amount of refrigerant required by the first sub-area to compensate for this loss. Figure 4 The solid arrows represent chilled water supplied by the chiller unit to area C, and the dashed arrows represent chilled water supplied by the chiller unit to area D. Furthermore, to ensure that chilled water supplied from areas C and D smoothly reaches area A, the automatic control valves on the left side of areas A and D are rotated 90 degrees downwards relative to the horizontal line. Figure 4 The structure of the central control valve and water pump is omitted.

[0139] If the selected second sub-region is region B, region C, or region D, and the total amount of refrigerant that these three regions can provide is less than the required amount of refrigerant, then the temperature of the refrigerant in the supply loop needs to be adjusted through the central control system. Specifically, firstly, based on the required amount of refrigerant and the amount of refrigerant that regions B, C, and D can provide, the second amount of refrigerant to be delivered is obtained. Then, based on the second amount of refrigerant to be delivered, the temperature of the refrigerant in the supply loop is reduced to cool down region A. The second amount of refrigerant to be delivered arrives at region A later than the amount of refrigerant that these three regions can provide.

[0140] After completing the above steps, it is still necessary to collect sensor data for each area in real time and calculate the dynamic load adaptability. That is, in the next sampling frame, the next sampling frame is taken as the current sampling frame, and the above steps of transferring cold energy from the second sub-region to the first sub-region through the pipeline of the self-control valve by adjusting the self-control valve are repeated. For example, assuming that in the previous sampling frame, area A is a low adaptability level sub-region, and the cold energy transfer scheme has been obtained and implemented through the above steps, in the current sampling frame, the dynamic load adaptability of area A still shows that area A is a low adaptability level sub-region, but its dynamic load adaptability value has decreased. At this time, the previous cold energy transfer scheme is still maintained. If the dynamic load adaptability of area A at the current moment still shows that area A is a low adaptability level sub-region, but its dynamic load adaptability value has increased, then its dynamic load adaptability continues to be monitored. If the dynamic load adaptability at the current moment shows that area A is a high adaptability level sub-region, the previous steps are repeated, the second sub-region is reselected and cold energy transfer is performed. During the period when area A is a high-fitness sub-region, the previous steps must be repeated each time the dynamic load fit increases, and a second sub-region must be selected and the cooling capacity transferred again until area A returns to a low-fitness sub-region. If area A remains a high-fitness sub-region after multiple adjustments to the refrigerant temperature in the supply circuit, and the dynamic load fit continues to rise, then the regulating valve on the main refrigerant pipe in the supply circuit needs to be adjusted to increase the flow rate of chilled water, ultimately achieving the goal of lowering the temperature of area A.

[0141] The structures shown in the attached figures are merely simplified examples, intended to enable those skilled in the art to understand the principle of cold energy transfer in this embodiment. They do not represent actual pipe network structures. This embodiment is applicable to situations where there is a first sub-region that needs to reduce its temperature. If there are multiple sub-regions, the region with the highest dynamic load adaptability is selected as the first sub-region.

[0142] For example, if the second sub-regions corresponding to region A are region B and region D, the chilled water flow direction in regions B and D is as follows: Figure 5 As shown, at this point, it is necessary to adjust the water pumps in the pipes between the self-control valves corresponding to areas A and B, and between the self-control valves corresponding to areas A and D, so that the chilled water flows to area A. To ensure that the chilled water transmitted from areas B and D smoothly reaches area A, both valves in the self-control valve corresponding to area A are rotated 90 degrees downwards relative to the horizontal line. Figure 5 The solid arrow indicates chilled water transferred from the chiller unit to area D, and the dashed arrow indicates chilled water transferred from the chiller unit to area B.

[0143] The temperature control method based on central air conditioning provided in this embodiment can adjust the temperature in the area in advance by monitoring the dynamic load adaptability. Compared with the prior art, which adjusts the temperature only after receiving the user's instruction to adjust the temperature, the time required to lower the temperature is shortened. Furthermore, when adjusting the temperature based on the dynamic load adaptability, this embodiment prioritizes the transfer of cooling capacity from the second sub-region. If the second sub-region cannot meet the required amount of refrigerant in the first sub-region, the temperature of the refrigerant in the supply circuit is then adjusted by the central control system. Compared with the prior art, which directly adjusts the temperature of the refrigerant in the supply circuit by the central control system based on the user's instruction, this further shortens the time for the cooling capacity to reach the first sub-region and reduces time delay.

[0144] Furthermore, embodiments of this application provide a temperature control system based on a central air conditioning system, comprising:

[0145] The dynamic load adaptability generation module is used to obtain the dynamic load adaptability of each sub-region based on the current characteristic parameters of multiple sub-regions.

[0146] The sub-region determination module is used to determine the first and second sub-regions under the current sampling frame among multiple sub-regions based on dynamic load adaptability.

[0147] The temperature control module adjusts the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit according to the amount of refrigerant to be delivered in the second sub-region.

[0148] Specifically, the central air conditioning control system includes the central air conditioning unit, which comprises cooling units, piping, a central control system, cooling pump sets, and chilled water pump sets. The cooling pump sets and chilled water pump sets maintain a stable flow of cooling water within the pipes. Furthermore, to ensure stable operation of the central air conditioning system, when starting it up, the cooling pump sets and chilled water pump sets must be turned on first, followed by other air conditioning components, including fans, heat exchange coils, and condensate pans.

[0149] This invention identifies the first sub-region by dividing it into sub-regions and determining the first sub-region based on dynamic load adaptability. Then, it first identifies a third sub-region belonging to the same sub-region and identifies a second sub-region that can provide cooling capacity. If the second sub-region cannot meet the refrigerant demand of the first sub-region, the central control system adjusts the refrigerant temperature in the supply loop and the refrigerant temperature in the recovery loop to meet the remaining demand of the first sub-region. This invention allows for rapid temperature adjustment of the first sub-region, reducing the time delay caused by direct adjustment by the central control system and meeting the user's temperature requirements.

[0150] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0151] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0152] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0153] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A temperature control method based on central air conditioning, characterized in that, The central air conditioning system includes multiple cooling sub-units, each cooling sub-unit corresponds to multiple air conditioning output zones, each air conditioning output zone corresponds to multiple sub-areas, and each sub-area controls the temperature of multiple sub-areas through corresponding central control valves and automatic control valves. The temperature control method includes: In the current sampling frame, the dynamic load adaptability of each sub-region is obtained based on the current feature parameters of the multiple sub-regions; the feature parameters include chilled water flow rate and equipment load value; the dynamic load adaptability includes the flow rate change rate of the current sampling frame compared to the adjacent previous sampling frame calculated based on the acquired data and the equipment load value change rate of the sub-region obtained based on the usage of the equipment in each sub-region, where the equipment load value refers to the heat generated by the equipment during operation; If the dynamic load adaptability of at least one sub-region is greater than a preset threshold, the first sub-region and the second sub-region under the current sampling frame are determined in the current sampling frame according to the dynamic load adaptability, wherein the second sub-region delivers the amount of refrigerant medium to be delivered to the first sub-region by adjusting the corresponding self-control valve. Within the current sampling frame, determine the amount of refrigerant medium to be delivered to the second sub-region, and deliver the determined amount of refrigerant medium to be delivered to the first sub-region through the self-control valve; In the next sampling frame adjacent to the current sampling frame, the next sampling frame is used as the current sampling frame, and the determined amount of refrigerant to be delivered is re-delivered through the pipeline where the self-controlled valve is located; The step of determining the first and second sub-regions under the current sampling frame in the plurality of sub-regions based on the dynamic load adaptation includes: Based on the dynamic load adaptability and the preset threshold, the adaptability level corresponding to the dynamic load adaptability is determined; Based on the adaptation level, the sub-region corresponding to the dynamic load adaptation with a high adaptation level among the multiple sub-regions is determined as the first sub-region under the current sampling frame; Based on the sub-regions corresponding to the first sub-region, determine the third sub-region corresponding to the first sub-region; Based on the load value corresponding to the first sub-region, determine the second sub-region under the current sampling frame from the third sub-region; The step of determining the second sub-region under the current sampling frame in the plurality of sub-regions from the third sub-region based on the load value corresponding to the first sub-region includes: The required amount of refrigerant for the first sub-region is determined based on the load value corresponding to the first sub-region and the adaptation level corresponding to the dynamic load adaptation. Based on the required cooling medium quantity of the first sub-region and the priority of the third sub-region, a second sub-region under the current sampling frame is determined from the third sub-region; the priority of the third sub-region is determined according to the type of the region.

2. The temperature control method based on central air conditioning according to claim 1, characterized in that, The step of determining the second sub-region under the current sampling frame from the plurality of sub-regions based on the required cooling medium amount of the first sub-region and the priority of the third sub-region includes: The amount of refrigerant to be delivered for the third sub-region is obtained based on the first amount and priority of the refrigerant to be delivered for the third sub-region. Based on the amount of refrigerant to be delivered corresponding to the third sub-region and the distance between the third sub-region and the first sub-region, the third sub-region is sorted to obtain the first list of refrigerant to be delivered; The second sub-region is determined based on the amount of refrigerant to be delivered corresponding to the third sub-region and the first list of refrigerant to be delivered.

3. The temperature control method based on central air conditioning according to claim 2, characterized in that, The step of determining the second sub-region based on the amount of refrigerant to be delivered corresponding to the third sub-region and the first list of refrigerant to be delivered includes: A fourth sub-region is determined based on the amount of refrigerant to be delivered corresponding to the third sub-region and the first list of refrigerant to be delivered; there are multiple fourth sub-regions. Determine whether there is a sub-region adjacent to the first sub-region in the fourth sub-region, and whether the fourth sub-regions are adjacent to each other; If not, update the first list of transported cooling media, and determine the second sub-region based on the updated first list of transported cooling media.

4. The temperature control method based on central air conditioning according to claim 1, characterized in that, After determining the amount of refrigerant to be delivered in the second sub-region, the temperature control method further includes adjusting the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit.

5. A temperature control method based on central air conditioning according to claim 4, characterized in that, The regulation of the refrigerant temperature in the supply circuit and the refrigerant temperature in the recovery circuit includes: If the amount of refrigerant to be delivered in the second sub-region does not meet the demand for refrigerant in the first sub-region, the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit shall be adjusted according to the amount of refrigerant to be delivered in the second sub-region and the total flow rate of chilled water. If the amount of refrigerant to be delivered in the second sub-region meets the demand for refrigerant in the first sub-region, the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit are adjusted according to the energy efficiency corresponding to the amount of refrigerant to be delivered.

6. A temperature control method based on central air conditioning according to claim 5, characterized in that, Adjusting the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit according to the amount of refrigerant to be delivered and the total flow rate of chilled water in the second sub-region includes: The second amount of refrigerant to be delivered is determined based on the amount of refrigerant to be delivered in the second sub-region; Determine the chilled water flow rate corresponding to the first sub-region based on the total chilled water flow rate; The temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit are adjusted according to the second amount of refrigerant to be delivered and the flow rate of the chilled water.

7. A temperature control method based on central air conditioning according to claim 6, characterized in that, The step of adjusting the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit according to the energy efficiency corresponding to the amount of refrigerant to be delivered includes: Compare the energy efficiency corresponding to the amount of refrigerant to be delivered with the preset energy efficiency; If the energy efficiency corresponding to the amount of refrigerant to be delivered is less than the preset energy efficiency, the amount of refrigerant to be delivered is updated according to the preset energy efficiency to obtain a third amount of refrigerant to be delivered; Obtain the second list of delivery cooling media corresponding to the second sub-region; The second sub-region is updated based on the third amount of refrigerant to be delivered and the second list of refrigerant to be delivered; Based on the updated second sub-region, adjust the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit.

8. A temperature control system based on a central air conditioning system, used to implement the temperature control method based on a central air conditioning system according to any one of claims 1-7, characterized in that, include: The dynamic load adaptability generation module is used to obtain the dynamic load adaptability of each sub-region based on the current characteristic parameters of multiple sub-regions. The sub-region determination module is used to determine the first sub-region and the second sub-region under the current sampling frame among the multiple sub-regions based on the dynamic load adaptation degree. The temperature control module adjusts the temperature of the refrigerant in the supply circuit and the temperature of the refrigerant in the recovery circuit according to the amount of refrigerant to be delivered in the second sub-region.

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