Chilled water precision air conditioning control method and control system

Abstract

The present invention provides a chilled water precision air conditioning control method and control system, which calculates an ideal control value of the supply air temperature, compares the calculated ideal control value of the supply air temperature with the real-time supply air temperature value, and determines and outputs a control instruction for increasing or decreasing the opening of a chilled water valve, and then controls the opening of the water valve according to the control instruction to control the chilled water flow, the fan supply air temperature, and the fan speed. Not only can the precise control of the chilled water flow be achieved, but also the precise control of the fan supply air temperature is ultimately achieved, thereby reducing the energy consumption of heating and humidification and the energy consumption of the chiller, and the fan speed is controlled to minimize the fan power consumption, so that the average fan power consumption is saved by more than 50%.

Description

Technical Field

[0001] The present disclosure relates to the technical field of refrigeration equipment control, and in particular to a chilled water precision air conditioning control method and control system. Background Art

[0002] Industrial computer rooms, especially communication computer rooms, are equipped with a large number of electronic equipment, and their normal operation requires a stable computer room temperature and humidity environment. Computer room precision air conditioning is an air conditioning system specially designed according to the requirements of various electronic equipment in the computer room for environmental temperature and humidity. Its basic working principle is the same as that of comfort air conditioning used in homes and offices, but due to its high reliability hardware configuration, it can complete high-precision control of the computer room environment temperature and humidity. With the continuous deepening of automation and informatization, data centers and other places with strict requirements on the working environment use a large number of precision air conditioners with precise control of temperature and humidity. Precision air conditioners are flexible in operation and have strong control and adjustment capabilities, but their energy consumption is also very considerable. Taking data centers as an example, the energy consumption of their basic equipment accounts for about 46% of the total energy consumption of data centers, while the energy consumption of air conditioning systems serving basic equipment accounts for 31%. The high energy consumption of data centers not only brings a heavy burden to enterprises, but also causes a huge waste of energy in the whole society. Therefore, under the premise of ensuring the environmental requirements of the workplace, optimizing the operation mode of precision air conditioning systems is of great significance to reducing energy consumption levels.

[0003] In order to ensure the smooth flow of communication lines, various communication equipment in the computer room needs to maintain 24-hour uninterrupted operation, which requires the air conditioner in the computer room to be turned on and running all year round. In addition, due to the dense communication equipment in the computer room, large heat dissipation, and high load heat density, the air conditioner in the computer room needs to be cooled and dissipated even in the severe winter season. The heat load of the computer room usually fluctuates between 10% and 20%, which is caused by the different working states and power consumption of the host equipment. Therefore, the precision air conditioning system in the computer room must be able to adapt to this load change so that the electronic components can work in the required environmental conditions and ensure the reliability of circuit performance.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the present disclosure is to provide a chilled water precision air conditioning control method and control system, which is used to at least to a certain extent overcome the problem that the optimal energy performance of the chiller cannot be guaranteed due to the limitations and defects of the relevant technology, making it difficult to achieve the lowest system energy consumption.

[0006] According to one aspect of the present disclosure, there is provided a chilled water precision air conditioning control method, comprising:

[0007] Obtain the real-time return air temperature value of the fan return air outlet and the real-time supply air temperature value of the fan outlet in the air conditioning system;

[0008] Calculating an ideal control value of the supply air temperature according to the real-time return air temperature value and the preset return air relative humidity setting value and the supply air relative humidity setting value;

[0009] The ideal control value of the supply air temperature is compared with the real-time supply air temperature value to determine and output a control instruction to increase or decrease the opening of the chilled water valve. The opening of the water valve is controlled according to the control instruction to control the chilled water flow, the fan supply air temperature and the fan speed.

[0010] In an exemplary embodiment of the present disclosure, the calculating the ideal control value of the supply air temperature according to the real-time return air temperature value and the preset return air relative humidity setting value and the supply air relative humidity setting value comprises:

[0011] Calculating a saturated water vapor pressure value according to the real-time return air temperature value and a preset return air relative humidity setting value;

[0012] Calculating the moisture content of the humid air according to the saturated water vapor pressure value and the set return air relative humidity setting value;

[0013] The ideal control value of the supply air temperature is calculated according to the moisture content value and the set supply air relative humidity setting value.

[0014] In an exemplary embodiment of the present disclosure, the formula for calculating the saturated water vapor pressure value according to the real-time return air temperature value and the preset return air relative humidity setting value is:

[0015]

[0016] Among them, P s is the saturated water vapor pressure of the moist air at the return air outlet of the air conditioner fan, t is the real-time return air temperature, and exp is an exponential function with the natural logarithm e as the base.

[0017] In an exemplary embodiment of the present disclosure, the formula for calculating the moisture content value of the humid air according to the saturated water vapor pressure value and the set return air relative humidity setting value is:

[0018]

[0019] Where d is the humidity value of the humid air, RH is the set return air relative humidity setting value, P s It is the saturated water vapor pressure of the moist air at the return air outlet of the air conditioner fan, and P is the atmospheric pressure.

[0020] According to one aspect of the present disclosure, there is provided a chilled water precision air conditioning control system, comprising:

[0021] The real-time return air supply air temperature acquisition module is used to obtain the real-time return air temperature value of the fan return air outlet and the real-time supply air temperature value of the fan outlet in the air conditioning system;

[0022] A supply air temperature ideal control value calculation module, used to calculate the supply air temperature ideal control value according to the real-time return air temperature value and the preset return air relative humidity setting value and supply air relative humidity setting value;

[0023] The control module is used to compare the ideal control value of the supply air temperature with the real-time supply air temperature value to determine and output a control instruction to increase or decrease the opening of the chilled water valve, and control the opening of the water valve according to the control instruction to control the chilled water flow, the fan supply air temperature and the fan speed.

[0024] In an exemplary embodiment of the present disclosure, the real-time return air and supply air temperature acquisition module includes a return air temperature sensor arranged at the return air outlet of the fan and a supply air temperature sensor arranged at the air outlet of the fan.

[0025] In an exemplary embodiment of the present disclosure, the air supply temperature ideal control value calculation module includes:

[0026] A saturated water vapor pressure calculation unit, used to calculate a saturated water vapor pressure value according to the real-time return air temperature value and a preset return air relative humidity setting value;

[0027] A moisture content calculation unit, which calculates the moisture content value of the humid air according to the saturated water vapor pressure value and the set return air relative humidity setting value;

[0028] The supply air temperature ideal control value calculation unit calculates the supply air temperature ideal control value according to the moisture content value and the set supply air relative humidity setting value.

[0029] According to one aspect of the present disclosure, there is provided an electronic device, including:

[0030] Memory; and

[0031] A processor is coupled to the memory, and the processor is configured to execute the above-mentioned chilled water precision air conditioning control method based on instructions stored in the memory.

[0032] According to one aspect of the present disclosure, a computer-readable storage medium is provided, on which a program is stored, and when the program is executed by a processor, the above-mentioned chilled water precision air conditioning control method is implemented.

[0033] The disclosed embodiment calculates the ideal control value of the supply air temperature, compares the calculated ideal control value of the supply air temperature with the real-time supply air temperature value, and determines and outputs a control instruction for increasing or decreasing the opening of the chilled water valve, and then controls the opening of the water valve according to the control instruction to control the chilled water flow, the fan supply air temperature and the fan speed. Not only can the precise control of the chilled water flow be achieved, thereby reducing the energy consumption of heating and humidification and the energy consumption of the chiller, but also the fan power can be minimized by controlling the fan speed, so that the average fan power consumption is saved by more than 50%.

[0034] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0036] Figure 1 A flow chart of a chilled water precision air conditioning control method 100 in an embodiment of the present disclosure is schematically shown.

[0037] Figure 2 Schematically shown Figure 1 The specific flow chart of step S104 in the chilled water precision air conditioning control method 100 is shown.

[0038] Figure 3 A schematic diagram of a chilled water precision air conditioning control system 200 in one embodiment of the present disclosure is schematically shown.

[0039] Figure 4 Schematically shown Figure 3 The schematic diagram of the real-time return air and supply air temperature acquisition module 10 in the chilled water precision air conditioning control system 200 is shown.

[0040] Figure 5 Schematically shown Figure 3 The schematic diagram of the ideal control value calculation module 20 for supply air temperature in the chilled water precision air conditioning control system 200 is shown.

[0041] Figure 6 Schematically shown Figure 3 A schematic diagram showing the connection of specific components of the disclosed chilled water precision air conditioning control system 200.

[0042] Figure 7The block diagram schematically shows an electronic device 700 in an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as being limited to the examples set forth herein; on the contrary, these embodiments are provided so that the present disclosure will be more comprehensive and complete, and the concepts of the example embodiments are fully conveyed to those skilled in the art. The described features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known technical solutions are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0044] In addition, the accompanying drawings are only schematic diagrams of the present disclosure, and the same reference numerals in the drawings represent the same or similar parts, so their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities, which do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0045] The exemplary embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0046] Figure 1 The flowchart of the chilled water precision air conditioning control method 100 in the first embodiment of the present disclosure is schematically shown. Figure 2 Schematically shown Figure 1 The specific flow chart of step S104 in the chilled water precision air conditioning control method 100 is shown.

[0047] refer to Figure 1 , the chilled water precision air conditioning control method 100 may include:

[0048] Step S102, obtaining a real-time return air temperature value of a fan return air outlet and a real-time supply air temperature value of a fan outlet in the air conditioning system;

[0049] Step S104, calculating an ideal control value of the supply air temperature according to the real-time return air temperature value and the preset return air relative humidity setting value and the supply air relative humidity setting value;

[0050] Step S106, compare the ideal control value of the supply air temperature with the real-time supply air temperature value to determine and output a control instruction to increase or decrease the opening of the chilled water valve, and control the opening of the valve according to the control instruction to control the chilled water flow, fan supply air temperature and fan speed.

[0051] Next, each step of the chilled water precision air conditioning control method 100 is described in detail.

[0052] In step S102, the real-time return air temperature value of the fan return air outlet and the real-time supply air temperature value of the fan outlet in the air conditioning system are obtained.

[0053] Specifically, a return air temperature sensor and a supply air temperature sensor are respectively provided at the fan return air inlet and the fan outlet in the air conditioning system to obtain the real-time return air temperature value of the fan return air inlet and the real-time supply air temperature value of the fan outlet in the air conditioning system.

[0054] Step S104, calculating an ideal control value of the supply air temperature according to the real-time return air temperature value and the preset return air relative humidity setting value and supply air relative humidity setting value.

[0055] refer to Figure 2 , step S104 specifically includes:

[0056] Step S1040, calculating the saturated water vapor pressure value according to the real-time return air temperature value and the preset return air relative humidity setting value;

[0057] Step S1042, calculating the moisture content of the humid air according to the saturated water vapor pressure value and the set return air relative humidity setting value;

[0058] Step S1044, calculating the ideal control value of the supply air temperature according to the moisture content value and the set supply air relative humidity setting value.

[0059] In step S1040, the saturated water vapor pressure value P is calculated. s The formula (1) is:

[0060]

[0061] In formula (1), P s is the saturated water vapor pressure value of the humid air, t is the real-time return air temperature value t1 collected in step S102, and exp is an exponential function with the natural logarithm e as the base. sThe saturated water vapor pressure, also known as the saturated vapor pressure, refers to the water vapor pressure under closed conditions when the gas phase and liquid phase of water reach equilibrium, that is, the saturated state. The pressure value is related to the corresponding temperature. In step S1040 of the embodiment of the present disclosure, the temperature used is the real-time return air temperature value t of the return air outlet of the air conditioner fan. The return air temperature value t is used to calculate the saturated water vapor pressure P of the humid air corresponding to the return air outlet of the fan. s1 Then, the humidity value d of the return air vent wet air is calculated through step S1042.

[0062] The formula (2) for calculating the humidity value d of the return air vent humid air in step S1042 is:

[0063]

[0064] In formula (2), d is the humidity value of the humid air, RH is the set value of the return air relative humidity, and P s is the saturated water vapor pressure value of the humid air at the return air outlet of the air conditioner fan, P is the atmospheric pressure, which is 101.3 kPa. In step S1042, the return air relative humidity setting value RH1 is set to 50%, and the saturated water vapor pressure value P of the humid air at the return air outlet calculated in step S1040 is substituted. s1 , the humidity content d of the humid air is calculated by formula (2).

[0065] Step S1044, calculate the ideal control value of the supply air temperature according to the moisture content value d calculated in step S1042 and the set supply air relative humidity setting value. In step S1044, the supply air relative humidity setting value RH2 is set to 85%. Substitute the supply air relative humidity setting value RH2, the moisture content value d of the return air outlet humid air calculated in step S1042, and the atmospheric pressure P as known numbers into formula (2) to reversely solve the saturated water vapor pressure value P of the humid air at the supply air outlet when the supply air relative humidity setting value is set to 85%. s2 Then P s2 Substitute the known number into formula (1) and solve for t in reverse. The t solved at this time is the ideal control value T of the supply air temperature.

[0066] Step S106, compare the ideal control value of the supply air temperature with the real-time supply air temperature value to determine and output a control instruction to increase or decrease the opening of the chilled water valve, and control the opening of the valve according to the control instruction to control the chilled water flow, fan supply air temperature and fan speed.

[0067] Specifically, the ideal supply air temperature control value T calculated in step S1044 is compared with the real-time supply air temperature value t2 collected by the supply air temperature sensor arranged at the air supply outlet of the fan to obtain a control deviation, and the proportion and integral of the control deviation are linearly combined to form a control quantity, thereby outputting a control instruction 1 for increasing or decreasing the opening of the chilled water valve 50, and controlling the opening of the water valve 50 arranged at the inlet of the internal coil of the air conditioner, that is, when the real-time supply air temperature value t2 is lower than the ideal supply air temperature control value T, it means that the amount of chilled water is sufficient, and at this time, the control instruction 1 is output to reduce the opening of the water valve 50; when the real-time supply air temperature value t2 is higher than the ideal supply air temperature control value T, it means that the amount of chilled water is insufficient, and at this time, the control instruction 1 is output to increase the opening of the water valve 50, thereby achieving precise control of the opening of the water valve 50, and then achieving precise control of the chilled water flow, and finally achieving precise control of the fan supply air temperature, thereby reducing the heating and humidification energy consumption and the chiller energy consumption.

[0068] Step S106 not only outputs control instruction 1 to control the water valve opening, but also outputs control instruction 2 to control the fan speed, thereby reducing the fan power to the maximum extent, and saving more than 50% of the average fan power consumption. Control instruction 2 is mainly based on the precise control of the fan supply air temperature achieved by control instruction 1. In addition to controlling the fan supply air temperature by outputting control instructions for the chilled water flow, it also assists in controlling the fan supply air temperature by controlling the fan speed. In the embodiment of the present disclosure, the fan speed is mainly controlled by setting the inverter 40 to execute control instruction 2, thereby reducing the fan power to the maximum extent.

[0069] The chilled water precision air conditioning control method of the disclosed embodiment calculates the ideal control value of the supply air temperature, and compares the calculated ideal control value of the supply air temperature with the real-time supply air temperature value to determine and output a control instruction to increase or decrease the opening of the chilled water valve, and then controls the opening of the water valve according to the control instruction to control the chilled water flow, the fan supply air temperature and the fan speed. Not only can the precise control of the chilled water flow be achieved to ultimately achieve precise control of the fan supply air temperature, thereby reducing the energy consumption of heating and humidification and the energy consumption of the chiller, but also the fan speed is controlled to minimize the fan power consumption, thereby saving more than 50% of the average fan power consumption.

[0070] Figure 3 A schematic diagram of a chilled water precision air conditioning control system 200 in one embodiment of the present disclosure is schematically shown. Figure 4 Schematically shown Figure 3 The schematic diagram of the real-time return air and supply air temperature acquisition module 10 in the chilled water precision air conditioning control system 200 is shown. Figure 5 Schematically shown Figure 3The schematic diagram of the ideal control value calculation module 20 for supply air temperature in the chilled water precision air conditioning control system 200 is shown. Figure 6 Schematically shown Figure 3 A schematic diagram showing the connection of specific components of the disclosed chilled water precision air conditioning control system 200.

[0071] refer to Figure 3 , a chilled water precision air conditioning control system 200, comprising:

[0072] The real-time return air supply air temperature acquisition module 10 is used to obtain the real-time return air temperature value of the fan return air outlet and the real-time supply air temperature value of the fan outlet in the air conditioning system;

[0073] The supply air temperature ideal control value calculation module 20 is used to calculate the supply air temperature ideal control value according to the real-time return air temperature value and the preset return air relative humidity setting value and supply air relative humidity setting value;

[0074] The control module 30 is used to compare the ideal control value of the supply air temperature with the real-time supply air temperature value to determine and output a control instruction to increase or decrease the opening of the chilled water valve, and control the opening of the water valve according to the control instruction to control the chilled water flow, the fan supply air temperature and the fan speed.

[0075] refer to Figure 4 The real-time return air supply air temperature acquisition module 10 includes a return air temperature sensor 11 arranged at the fan return air outlet and a supply air temperature sensor 12 arranged at the fan outlet. The supply air temperature ideal control value calculation module 20 and the control module 30 are configured as control chips with control programs and calculation programs written therein.

[0076] refer to Figure 5 The air supply temperature ideal control value calculation module 20 includes:

[0077] A saturated water vapor pressure calculation unit 21, used to calculate a saturated water vapor pressure value according to the real-time return air temperature value and a preset return air relative humidity setting value;

[0078] A moisture content calculation unit 22 calculates the moisture content value of the humid air according to the saturated water vapor pressure value and the set return air relative humidity setting value;

[0079] The supply air temperature ideal control value calculation unit 23 calculates the supply air temperature ideal control value according to the moisture content value and the set supply air relative humidity setting value.

[0080] Since the calculation method of each functional unit of the supply air temperature ideal control value calculation module 20 has been described in detail in the corresponding method embodiment, the present disclosure will not repeat it here.

[0081] refer to Figure 6The chilled water precision air conditioning control system 200 outputs a control instruction 1 for increasing or decreasing the opening of the chilled water valve 50, and controls the opening of the water valve 50 arranged at the inlet of the internal coil of the air conditioner, that is, when the real-time supply air temperature value t2 is lower than the ideal control value T of the supply air temperature, the control instruction 1 is output to reduce the opening of the water valve 50; when the real-time supply air temperature value t2 is higher than the ideal control value T of the supply air temperature, the control instruction 1 is output to increase the opening of the water valve 50, thereby realizing precise control of the opening of the water valve 50, and then realizing precise control of the chilled water flow, and finally realizing precise control of the fan supply air temperature, thereby reducing the heating and humidification energy consumption and the energy consumption of the chiller.

[0082] The chilled water precision air conditioning control system 200 not only outputs control instruction 1 to control the water valve opening, but also outputs control instruction 2 to control the fan speed, thereby reducing the fan power to the maximum extent, and saving more than 50% of the average fan power consumption. Control instruction 2 is mainly based on the precise control of the fan supply air temperature achieved by control instruction 1. In addition to controlling the fan supply air temperature by outputting control instructions for the chilled water flow, it is also assisted in controlling the fan supply air temperature by controlling the fan speed. In the embodiment of the present disclosure, the control of the fan speed is mainly achieved by setting the inverter 40 to execute control instruction 2, thereby reducing the fan power to the maximum extent.

[0083] In the disclosed embodiment, the chilled water precision air conditioning control system 200 calculates the ideal control value of the supply air temperature by setting the ideal control value calculation module 20 for the supply air temperature, and the control module 30 compares the calculated ideal control value of the supply air temperature with the real-time supply air temperature value to determine and output a control instruction to increase or decrease the opening of the chilled water valve, and then controls the opening of the water valve according to the control instruction to control the chilled water flow, the fan supply air temperature and the fan speed. Not only can the precise control of the chilled water flow be achieved, but also the precise control of the fan supply air temperature is ultimately achieved, thereby reducing the energy consumption of heating and humidification and the energy consumption of the chiller. In addition, by controlling the fan speed, the fan power is minimized, and the average fan power consumption is saved by more than 50%.

[0084] It should be noted that, although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into multiple modules or units to be embodied.

[0085] In an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided.

[0086] It will be appreciated by those skilled in the art that various aspects of the present invention may be implemented as systems, methods or program products. Therefore, various aspects of the present invention may be specifically implemented in the following forms, namely: complete hardware implementation, complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software, which may be collectively referred to herein as "circuits", "modules" or "systems".

[0087] Refer to the following Figure 7 An electronic device 700 according to this embodiment of the present invention will be described. Figure 7 The electronic device 700 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0088] like Figure 7 As shown, the electronic device 700 is in the form of a general-purpose computing device. The components of the electronic device 700 may include, but are not limited to: a memory 720, and a processor 710 coupled to the memory 720, the processor 710 being configured to execute the above-mentioned chilled water precision air conditioning control method 100 based on instructions stored in the memory 720. The memory 720 and the processor 710 perform data transmission via a bus 730.

[0089] The memory 720 stores program codes, which can be executed by the processor 710, so that the processor 710 performs the steps according to various exemplary embodiments of the present invention described in the above “Exemplary Method” section of this specification. For example, the processor 710 can perform the following steps: Figure 1 Step S102 shown in: obtaining the real-time return air temperature value of the fan return air outlet and the real-time supply air temperature value of the fan outlet in the air-conditioning system; step S104: calculating the ideal control value of the supply air temperature according to the real-time return air temperature value and the preset return air relative humidity setting value and the supply air relative humidity setting value; step S106: comparing the ideal control value of the supply air temperature with the real-time supply air temperature value to determine and output a control instruction to increase or decrease the opening of the chilled water valve, and controlling the opening of the water valve according to the control instruction to control the chilled water flow, the fan supply air temperature and the fan speed.

[0090] The memory 720 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 7201 and / or a cache memory unit 7202 , and may further include a read-only memory unit (ROM) 7203 .

[0091] The memory 720 may also include a program / utility 7204 having a set (at least one) of program modules 7205, such program modules 7205 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0092] Bus 730 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0093] The electronic device 700 may also communicate with one or more external devices 800 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 700, and / or communicate with any device that enables the electronic device 700 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 750. Furthermore, the electronic device 700 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 760. As shown, the network adapter 760 communicates with other modules of the electronic device 700 via a bus 730. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 700, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0094] Through the description of the above implementation, it is easy for those skilled in the art to understand that the example implementation described here can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation of the present disclosure.

[0095] In an exemplary embodiment of the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the above method of the present specification is stored. In some possible implementations, various aspects of the present invention can also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps according to various exemplary embodiments of the present invention described in the above "Exemplary Method" section of the present specification.

[0096] The program product for implementing the above method according to an embodiment of the present invention can adopt a portable compact disk read-only memory (CD-ROM) and include program code, and can be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto, and in this document, a readable storage medium can be any tangible medium containing or storing a program, which can be used by or in combination with an instruction execution system, an apparatus or a device.

[0097] The program product may use any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0098] Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0099] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0100] Program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., through the Internet using an Internet service provider).

[0101] In addition, the above-mentioned figures are only schematic illustrations of the processes included in the method according to an exemplary embodiment of the present invention, and are not intended to be limiting. It is easy to understand that the processes shown in the above-mentioned figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0102] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary technical solutions in the art that are not disclosed in the present disclosure. The specification and examples are to be considered as exemplary only, and the true scope and concept of the present disclosure are indicated by the claims.

Claims

1. A chilled water precision air conditioning control method, characterized in that: include: Obtain the real-time return air temperature value of the fan return air outlet and the real-time supply air temperature value of the fan outlet in the air conditioning system; Calculating an ideal control value of the supply air temperature according to the real-time return air temperature value and the preset return air relative humidity setting value and the supply air relative humidity setting value; Compare the ideal control value of the supply air temperature with the real-time supply air temperature value to determine and output a control instruction to increase or decrease the opening of the chilled water valve, and control the opening of the valve according to the control instruction to control the chilled water flow, the fan supply air temperature and the fan speed; The calculating of the ideal control value of the supply air temperature according to the real-time return air temperature value and the preset return air relative humidity setting value and the supply air relative humidity setting value comprises: Calculating the saturated water vapor pressure value by a first formula according to the real-time return air temperature value and the preset return air relative humidity setting value; Calculating the moisture content of the humid air by a second formula according to the saturated water vapor pressure value and the set return air relative humidity setting value; According to the moisture content value, the set supply air relative humidity setting value and the atmospheric pressure value, the saturated water vapor pressure value corresponding to the supply air relative humidity setting value is reversely solved by the second formula, and according to the saturated water vapor pressure value, the ideal control value of the supply air temperature is reversely solved by the first formula.

2. The chilled water precision air conditioning control method according to claim 1, characterized in that: The first formula for calculating the saturated water vapor pressure value according to the real-time return air temperature value and the preset return air relative humidity setting value is: Among them, Ps is the saturated water vapor pressure value of the moist air at the return air outlet of the air conditioning fan, t is the real-time return air temperature value, and exp is an exponential function with the natural logarithm e as the base.

3. The chilled water precision air conditioning control method according to claim 1, characterized in that: The second formula for calculating the moisture content of the humid air according to the saturated water vapor pressure value and the set return air relative humidity setting value is: Among them, d is the moisture content of the humid air, RH is the set return air relative humidity setting value, Ps is the saturated water vapor pressure value of the humid air at the return air outlet of the air conditioning fan, and P is the atmospheric pressure.

4. A chilled water precision air conditioning control system, characterized in that: include: The real-time return air supply air temperature acquisition module is used to obtain the real-time return air temperature value of the fan return air outlet and the real-time supply air temperature value of the fan outlet in the air conditioning system; A supply air temperature ideal control value calculation module, used to calculate the supply air temperature ideal control value according to the real-time return air temperature value and the preset return air relative humidity setting value and supply air relative humidity setting value; A control module, used for comparing the ideal control value of the supply air temperature with the real-time supply air temperature value to determine and output a control instruction for increasing or decreasing the opening of the chilled water valve, and controlling the opening of the valve according to the control instruction to control the chilled water flow, the fan supply air temperature and the fan speed; The control module is also used to calculate the saturated water vapor pressure value through the first formula according to the real-time return air temperature value and the preset return air relative humidity setting value; calculate the moisture content value of the humid air through the second formula according to the saturated water vapor pressure value and the set return air relative humidity setting value; reversely solve the saturated water vapor pressure value corresponding to the supply air relative humidity setting value through the second formula according to the moisture content value, the set supply air relative humidity setting value and the atmospheric pressure value, and reversely solve the ideal control value of the supply air temperature through the first formula according to the saturated water vapor pressure value.

5. The chilled water precision air conditioning control system according to claim 4, characterized in that: The real-time return air and supply air temperature acquisition module includes a return air temperature sensor arranged at the return air outlet of the fan and a supply air temperature sensor arranged at the air outlet of the fan.

6. The chilled water precision air conditioning control system according to claim 4, characterized in that: The ideal control value calculation module for the supply air temperature includes: A saturated water vapor pressure calculation unit, used to calculate a saturated water vapor pressure value according to the real-time return air temperature value and a preset return air relative humidity setting value; A moisture content calculation unit, which calculates the moisture content value of the humid air according to the saturated water vapor pressure value and the set return air relative humidity setting value; The supply air temperature ideal control value calculation unit calculates the supply air temperature ideal control value according to the moisture content value and the set supply air relative humidity setting value.

7. An electronic device, characterized in that: include: Memory; as well as A processor coupled to the memory, the processor being configured to execute the chilled water precision air conditioning control method according to any one of claims 1 to 3 based on instructions stored in the memory.

8. A computer-readable storage medium having a program stored thereon, wherein when the program is executed by a processor, the method for controlling the chilled water precision air conditioning according to any one of claims 1 to 3 is implemented.

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