Central air conditioning power load limiting control system and central air conditioning

Abstract

This application proposes a central air conditioning power load limiting control system and a central air conditioning system, applied in the field of air conditioning technology. The central air conditioning power load limiting control system includes: a signal input area for acquiring a power consumption limit value and a current power consumption value; a signal processing area connected to the signal input area for calculating the power consumption limit value and the current power consumption value to obtain the number of operating chiller units and the water valve opening; and a signal output area connected to the signal processing area for outputting the number of operating chiller units and / or the water valve opening. Because this application can determine the number of operating chiller units and the water valve opening based on the power consumption limit value and the current power consumption value, it can adjust the number of operating chiller units and the water valve opening, thereby achieving precise control of the central air conditioning power load.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a central air conditioning power load limiting control system and a central air conditioning system. Background Technology

[0002] In related technologies, chillers are the largest power-consuming devices in central air conditioning systems. Currently, air conditioning systems in large and medium-sized commercial and office buildings generally achieve power consumption control by shutting down some of the operating chillers to provide rapid demand response. However, shutting down some of the operating chillers cannot control the power consumption of the air conditioning system to a specific target value. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a central air conditioning power load limiting control system and a central air conditioning unit, aiming to improve the accuracy of central air conditioning power load adjustment.

[0004] In a first aspect, embodiments of this application provide a central air conditioning power load limiting control system, including:

[0005] The signal input area is used to obtain the power consumption limit value and the current power consumption value;

[0006] The signal processing area, connected to the signal input area, is used to calculate the power consumption limit value and the current power consumption value to obtain the number of chiller units in operation and the water valve opening degree.

[0007] The signal output area, connected to the signal processing area, is used to output the number of operating chiller units and / or the opening degree of the water valve.

[0008] According to some embodiments of this application, the signal input area includes:

[0009] A demand limit setting module, connected to the signal processing area, is used to obtain the power consumption limit value;

[0010] An air conditioning water system energy consumption monitoring module is connected to the signal processing area and is used to obtain the current power consumption value.

[0011] According to some embodiments of this application, the signal processing region includes:

[0012] The demand limit control module is connected to the demand limit setting module and the air conditioning water system energy consumption monitoring module, respectively, and is used to calculate the power consumption limit value and the current power consumption value to obtain the number of chiller units in operation and the water valve opening degree.

[0013] According to some embodiments of this application, the signal output area includes:

[0014] The air conditioning water system communication module is connected to the demand-limited control module and is used to output the number of operating chiller units and / or the opening degree of the water valve.

[0015] According to some embodiments of this application, the signal output area further includes:

[0016] The chiller module is connected to the air conditioning water system communication module.

[0017] According to some embodiments of this application, the signal output area further includes:

[0018] The air handling unit module is connected to the air conditioning water system communication module.

[0019] According to some embodiments of this application, the central air conditioning power load limiting control system further includes:

[0020] A touch screen is connected to the aforementioned requirement-limited control module.

[0021] According to some embodiments of this application, the air handling unit module further includes:

[0022] Multiple water valves and multiple air handling units are provided, and each of the air handling units is connected to the air conditioning water system communication module through its respective water valve.

[0023] According to some embodiments of this application, the central air conditioning power load limiting control system further includes:

[0024] A water pump is provided, and the chiller module is connected to the air handling unit module via the water pump.

[0025] Secondly, embodiments of this application provide a central air conditioning system, including the central air conditioning power load limiting control system as described in the first aspect above.

[0026] According to the technical solution of the embodiments of this application, at least the following beneficial effects are achieved: This application proposes a central air conditioning power load limiting control system and a central air conditioning system, applied in the field of air conditioning technology. The central air conditioning power load limiting control system includes: a signal input area for acquiring a power consumption limit value and a current power consumption value; a signal processing area connected to the signal input area for calculating the power consumption limit value and the current power consumption value to obtain the number of operating chiller units and the water valve opening; and a signal output area connected to the signal processing area for outputting the number of operating chiller units and / or the water valve opening. Because this application can determine the number of operating chiller units and the water valve opening based on the power consumption limit value and the current power consumption value, thereby adjusting the number of operating chiller units and the water valve opening, it can achieve precise control of the central air conditioning power load.

[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments of this utility model are described below. It should be understood that the drawings described below are only for the convenience of clearly illustrating some embodiments of the technical solutions of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The utility model will be further described below in conjunction with the drawings and embodiments:

[0029] Figure 1 This is a schematic diagram of the structure of a central air conditioning power load limiting control system provided in one embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the structure of a central air conditioning power load limiting control system proposed in another embodiment of this application. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0032] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] In this utility model, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] In some cases, chillers are the largest power-consuming devices in central air conditioning systems. Current large and medium-sized commercial and office building air conditioning systems generally achieve power consumption control by shutting down some of the operating chillers to provide rapid demand response. However, shutting down some of the operating chillers cannot control the power consumption of the air conditioning system to a specific target value.

[0037] Based on the above, this application proposes a central air conditioning power load limiting control system and a central air conditioning unit, aiming to improve the accuracy of central air conditioning power load adjustment.

[0038] The various embodiments of the central air conditioning power load limiting control system of this application will be further described below with reference to the accompanying drawings.

[0039] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a central air conditioning power load limiting control system provided in one embodiment of this application;

[0040] In one embodiment, the central air conditioning power load limiting control system includes a signal input area 100, a signal processing area 200, and a signal output area 300.

[0041] It is understandable that signal input area 100 is used to obtain the power consumption limit value and the current power consumption value.

[0042] Understandably, the signal processing area 200, connected to the signal input area 100, is used to calculate the power consumption limit and the current power consumption value to obtain the number of chiller units in operation and the water valve opening.

[0043] Understandably, the signal output area 300 is connected to the signal processing area 200 and is used to output the number of operating chiller units and / or the opening degree of water valves.

[0044] It is understood that the embodiments of this application can calculate and determine the number of operating chiller units and the opening degree of the water valve by using the power consumption limit value and the current power consumption value, thereby adjusting the number of operating chiller units and the opening degree of the water valve, and thus adjusting the power consumption value of the central air conditioning power load limiting control system to the power consumption limit value, thereby improving the accuracy of central air conditioning power load adjustment.

[0045] In another embodiment, the signal input area 100 includes a demand limit setting module 110 and an air conditioning water system energy consumption monitoring module 120.

[0046] Understandably, the demand limit setting module 110 is connected to the signal processing area 200 and is used to obtain the power consumption limit value.

[0047] Understandably, the air conditioning water system energy consumption monitoring module 120 is connected to the signal processing area 200 to obtain the current power consumption value.

[0048] It is understood that the power consumption limit mentioned above can be set by the user, and this application embodiment does not impose specific limitations on it.

[0049] In another embodiment, the signal processing area 200 includes a demand limiting control module 210.

[0050] It is understandable that the demand limit control module 210 is connected to the demand limit setting module 110 and the air conditioning water system energy consumption monitoring module 120 respectively, and is used to calculate the power consumption limit value and the current power consumption value to obtain the number of chiller units in operation and the water valve opening.

[0051] It is understandable that the number of operating chiller units mentioned above can be calculated using the formula for calculating the number of operating units: ;in, Number of running units This is a power consumption limit value. This is the power output at full load.

[0052] Understandably, ceil is a function that rounds a number up to the nearest integer.

[0053] It is understandable that the water valve opening mentioned above can be calculated using the valve opening calculation formula, which is: ,in, For valve opening, The current valve opening. The first preset threshold, This is the valve opening correction value, which is calculated using the valve opening correction value calculation formula. The valve opening correction value calculation formula is as follows: ,in, This is the current power consumption value. This is a power consumption limit.

[0054] It is understood that the embodiments of this application can calculate the number of operating chiller units and the opening degree of water valves through the demand limiting control module 210, thereby adjusting the number of operating chiller units and the opening degree of water valves, and thus adjusting the power consumption value of the central air conditioning power load limiting control system to the power consumption limit value, thereby improving the accuracy of central air conditioning power load adjustment.

[0055] In another embodiment, the signal output area 300 includes an air conditioning water system communication module 310.

[0056] It is understandable that the air conditioning water system communication module 310 is connected to the demand limitation control module 210 to output the number of operating chiller units and / or the water valve opening degree.

[0057] It is understood that, in this embodiment of the application, the number of operating chiller units and / or the opening degree of water valves are output through the air conditioning water system communication module 310, so as to adjust the number of operating chiller units and the opening degree of water valves, thereby adjusting the power consumption value of the central air conditioning power load limiting control system to the power consumption limit value, and improving the accuracy of central air conditioning power load adjustment.

[0058] In another embodiment, the signal output area 300 further includes a chiller module 320.

[0059] It is understandable that the chiller module 320 is connected to the air conditioning water system communication module 310.

[0060] It is understandable that the number of operating chiller units is output to the chiller unit module 320 through the air conditioning water system communication module 310, so as to adjust the number of operating chiller units in the chiller unit module 320, thereby adjusting the power consumption value of the central air conditioning power load limiting control system.

[0061] In another embodiment, the signal output area 300 further includes an air handling unit module 330.

[0062] It is understandable that the air handling unit module 330 is connected to the air conditioning water system communication module 310.

[0063] It is understandable that the water valve opening is output to the air handling unit module 330 through the air conditioning water system communication module 310, so as to adjust the water valve opening of the air handling unit module 330, thereby adjusting the power consumption value of the central air conditioning power load limiting control system.

[0064] Understandably, the air handling unit module 330 also includes multiple water valves and multiple air handling units.

[0065] It is understandable that each air handling unit is connected to the air conditioning water system communication module 310 through its respective water valve, thereby enabling the water valve to be adjusted by the water valve opening output by the air conditioning water system communication module 310, in order to adjust the power consumption value of the central air conditioning power load limiting control system.

[0066] In another embodiment, the central air conditioning power load limiting control system further includes a touch screen display 400.

[0067] Understandably, the touch display 400 is connected to the demand-limited control module 210.

[0068] It is understood that, since the central air conditioning power load limiting control system of this application embodiment includes a touch screen 400, equipment maintenance personnel can interact with the demand limiting control module 210 in real time to conveniently view the control effect and adjust the control parameters, so as to better regulate the central air conditioning power load limiting control system.

[0069] In another embodiment, the central air conditioning power load limiting control system further includes a water pump 500, and the chiller module 320 is connected to the air handling unit module 330 via the water pump 500.

[0070] Based on the central air conditioning power load limiting control system of the above embodiments, the overall embodiments of the central air conditioning power load limiting control system of this application are presented below.

[0071] Example 1:

[0072] The central air conditioning power load limiting control system is divided into a signal input area 100, a signal processing area 200, and a signal output area 300. The signal input area 100 includes a demand limit setting module 110, which acquires power consumption limits from the power grid or load aggregator and inputs them to the demand limiting control module 210. The signal input area 100 also includes an air conditioning water system energy consumption monitoring module 120, which monitors the power consumption of the chiller units and water pumps 500 in the central air conditioning power load limiting control system in real time through sensors and inputs this data to the demand limiting control module 210. The signal processing area 200 contains a core demand limiting control module 210, which calculates the number of chiller units currently operating and the water valve opening of the air handling units based on the difference between the input signal values ​​(power consumption limit and current power consumption), ensuring that the current power consumption is close to the power consumption limit, thus accurately controlling the power consumption of the central air conditioning power load limiting control system within the target value required by the power grid or load aggregator. The signal output area 300 includes an air conditioning water system communication module 310, which transmits the output signals of the demand limiting control module 210 to the corresponding controllers of each chiller and air handling unit, ultimately executing control commands. Simultaneously, the central air conditioning power load limiting control system is equipped with a touchscreen display 400, allowing equipment maintenance personnel to interact with the control module in real time, facilitating the viewing of control effects and adjustment of control parameters. Based on the proposed central air conditioning power load limiting control system, optimization algorithms can be incorporated to continuously improve the control effect.

[0073] Example 2:

[0074] like Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a central air conditioning power load limiting control system proposed in another embodiment of this application.

[0075] The specific implementation process of the central air conditioning power load limiting control system is as follows: The demand limit setting module 110 obtains the power consumption limit signal value required by the power grid or load aggregator, such as 2000kW. At this time, the air conditioning water system energy consumption monitoring module 120 obtains that there are currently 3 chiller units operating, with a real-time power consumption value of 3000kW. Based on the rated power of each unit being 1000kW, the demand limit control module 210 executes a control command to shut down one of the chiller units. Subsequently, at each time based on the real-time power consumption value, such as 2030kW, the demand limit control module 210 executes a control command to reduce the valve opening of the air handling unit, so that the actual power consumption value is close to the target value (2000kW). Conversely, if the power consumption value is 1970kW, the demand limit control module 210 executes a control command to increase the valve opening of the air handling unit.

[0076] The above provides a detailed description of the preferred embodiments of this application. However, this application is not limited to the above-described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A central air conditioning power load limiting control system, characterized by, include: The signal input area is used to obtain the power consumption limit value and the current power consumption value; The signal processing area, connected to the signal input area, is used to calculate the power consumption limit value and the current power consumption value to obtain the number of chiller units in operation and the water valve opening degree. The signal output area, connected to the signal processing area, is used to output the number of operating chiller units and / or the opening degree of the water valve.

2. The central air conditioning power load limiting control system according to claim 1, wherein The signal input area includes: A demand limit setting module, connected to the signal processing area, is used to obtain the power consumption limit value; An air conditioning water system energy consumption monitoring module is connected to the signal processing area and is used to obtain the current power consumption value.

3. The central air conditioning power load limiting control system according to claim 2, wherein The signal processing area includes: The demand limit control module is connected to the demand limit setting module and the air conditioning water system energy consumption monitoring module, respectively, and is used to calculate the power consumption limit value and the current power consumption value to obtain the number of chiller units in operation and the water valve opening degree.

4. The central air conditioning power load limiting control system according to claim 3, wherein The signal output area includes: The air conditioning water system communication module is connected to the demand-limited control module and is used to output the number of operating chiller units and / or the opening degree of the water valve.

5. The central air conditioning power load limiting control system according to claim 4, wherein The signal output area also includes: The chiller module is connected to the air conditioning water system communication module.

6. The central air conditioning power load limiting control system according to claim 5, wherein The signal output area also includes: The air handling unit module is connected to the air conditioning water system communication module.

7. The central air conditioning power load limiting control system according to claim 3, wherein The central air conditioning power load limiting control system also includes: A touch screen is connected to the aforementioned requirement-limited control module.

8. The central air conditioning power load limiting control system according to claim 6, characterized in that, The air handling unit module also includes: Multiple water valves and multiple air handling units are provided, and each of the air handling units is connected to the air conditioning water system communication module through its respective water valve.

9. The central air conditioning power load limiting control system according to claim 6, characterized in that, The central air conditioning power load limiting control system also includes: A water pump is provided, and the chiller module is connected to the air handling unit module via the water pump.

10. A central air conditioning system, characterized in that, Including the central air conditioning power load limiting control system as described in any one of claims 1 to 9.

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